EP3903006A1

EP3903006A1 - Rotary pump with axial compensation, outlet seal for a pump, and pre-assembled pump unit

Info

Publication number: EP3903006A1
Application number: EP19835307.0A
Authority: EP
Inventors: Claus Welte
Original assignee: Schwaebische Huettenwerke Automotive GmbH
Current assignee: Schwaebische Huettenwerke Automotive GmbH
Priority date: 2018-12-28
Filing date: 2019-12-27
Publication date: 2021-11-03
Also published as: US20210396226A1; CN113348302A; US11608828B2; WO2020136270A1; CN113348302B; DE102018133679A1

Abstract

The invention relates to a pump for supplying an assembly with a compressed fluid, said pump comprising: - a pump housing (1) with a peripheral wall (2) which surrounds a delivery chamber (5) of the pump and with a first end wall (3) and a second end wall (4) which delimit the delivery chamber (5) at the chamber end faces, - a rotor (10), which can rotate about a rotational axis (R) in the delivery chamber (5), for forming delivery cells, - a pressure outlet (8) which leads to an outer end face of the first end wall (3), said end face facing away from the delivery chamber (5), and by means of which the compressed fluid can be discharged out of the delivery chamber (5), - an outlet seal (14) which is provided on the outer end face of the first end wall (3) in order to seal the pressure outlet (8), and - a mounting (27) which is in retaining engagement with the outlet seal (14), positions the peripheral wall (3) and the end walls (2, 4) relative to each other, and axially holds same together by means of the retaining engagement as a pre-assembled assembly unit.

Description

Rotary pump with axial compensation,

Outlet seal for a pump

and pre-assembled pump unit

The invention relates to a rotary pump which is set up for axial compensation of component and / or installation tolerances, thermally induced changes in geometry and pressure-related movements. In addition, the invention relates to an outlet seal for a pump, which can be designed in particular as a rotary pump, and also to the pump including the outlet seal. The pump can be single-flow or multi-flow, in particular multi-circuit. Finally, the invention also relates to a preassembled pump or assembly unit. The pump can be used as a transmission pump for supplying a transmission, for example an automatic transmission or steering gear of a vehicle or a transmission of a wind turbine, with pressurized fluid. In yet another use, it can be used as a lubricating oil pump to supply a

Internal combustion engine, for example a drive motor of a vehicle, can be used with lubricating oil. A combined use as a lubricating oil pump and as

A gear pump is also conceivable, especially in versions in which the pump is multi-flow. The pump can advantageously be designed in a cartridge design.

A pump in the form of a pump insert, which is arranged in a receiving shaft of a receiving device, is known from WO 01/94791 A1. The pump insert includes a peripheral wall surrounding a pump delivery chamber and two

End walls that delimit the delivery chamber on both ends. In the

Delivery chamber is a rotor with blades rotatable about an axis of rotation. The delivery chamber is divided into delivery cells by means of the vanes, which periodically increase and decrease as the rotor rotates in order to deliver pressure fluid from a low-pressure side of the pump to a high-pressure side. The pump insert is arranged axially between a bottom of the receiving shaft and a cover of the receiving device. During operation of the pump, the pressure fluid is drawn from an outer circumference

The pump insert extends into the delivery chamber and is sucked through the one end wall into a pressure chamber formed between this end wall and the bottom of the receiving shaft and from there. An annular sealing element, which surrounds the relevant end wall and acts as a radial seal, separates the pressure chamber from the Suction chamber. A spring device is arranged in the pressure chamber, which axially tensions the pump insert against the cover. The pump insert is axially movable to a small extent relative to the receiving device against the force of the spring device, so that

Component tolerances and changes in geometry can be compensated. The end wall is axially guided by the receiving device in the area of the radial seal. The pump has two working flows, which deliver together in the pressure chamber, i. H. the floods of work are not separate; the pump is designed as a single circuit pump.

EP 3 081 741 A2 discloses a gear pump with several working floods. The pump is designed as a multi-circuit pump. The pump accordingly has separate pressure outlets which are sealed off from one another, in each case at least one pressure outlet per flood. In exemplary embodiments, a first pressure outlet is sealed by means of an annular radial seal which surrounds a housing of the pump. An annular outlet seal, which surrounds a second pressure outlet in a sealing manner, is arranged within the pressure chamber obtained by means of the radial seal in order to separate the second pressure outlet from the first pressure chamber. The pump is designed in a cartridge design and is installed with an outer end face of the pump housing first in a receiving shaft of a receiving device, for example a housing of an automatic transmission. A pressure fluid delivered by the pump is discharged via the pressure outlets and axially opposite pressure connections of the receiving device. A

Spring device, which is supported on a bottom of the receiving shaft, presses axially toward the bottom of the receiving shaft with spring force

opposite outer face of the pump housing, whereby tolerances and changes in geometry in the axial direction can be compensated.

US 2017/0260979 A1 discloses a sealing arrangement for a vane pump in a cartridge design, the vane pump having two working flows and being designed as a two-circuit pump. The sealing arrangement comprises a radial seal which runs around the circumference of an end wall of the pump housing and which separates a first pressure chamber of the pump from the suction chamber, and an outlet seal which is arranged on an outer end side of the end wall. The outlet seal separates the first pressure chamber from a second pressure chamber of the pump and seals a shaft passage for a drive shaft of the pump in that the outlet seal rotates around the shaft passage. It is an object of the invention to provide a pump which is suitable for arrangement in a receiving shaft of a receiving device and for this purpose has a housing end wall with one or more pressure outlets for the discharge of a pressure fluid from a delivery chamber of the pump. For such a pump, the sealing of the one or more pressure outlets is to be improved in relation to component and / or installation tolerances of the receiving device and the pump and / or thermally-related changes in geometry and / or pressure-related movements of housing structures of the pump.

A pump as the invention relates to a pump housing with a

Delivery chamber and a rotor which is rotatable in the delivery chamber about an axis of rotation to form delivery cells which increase and decrease periodically as the rotor rotates, in order to pressurize fluid from a low-pressure side of the pump to one

To promote the high pressure side of the pump. The pump housing has a peripheral wall which surrounds the delivery chamber of the pump, a first end wall and a second end wall, the end walls delimiting the delivery chamber on their end faces. At an outer end face of the first end wall facing away from the delivery chamber opens

Pressure outlet for pressure fluid delivered from the delivery chamber. The pump comprises an outlet seal which is provided for sealing the pressure outlet on the outer end face of the first end wall.

The pump housing can be mounted by means of a mounting structure on a receiving device available at the mounting location or can already be mounted. If it is said that the pump can be mounted on a mounting device, this also includes mounting inside the mounting device. The

Assembly structure can be part of the pump. In addition to

Pump housing provided or by one of the components mentioned

Pump housing, for example, are formed by the second end wall. In alternative designs, a mounting structure can be part of the

Recording device and thus be provided externally in relation to the pump.

The receiving device can in particular be a housing of an assembly to be supplied with the pressurized fluid, such as a transmission or a motor. In the assembled state, the first end wall of the pump housing is axially opposite a connecting wall of the receiving device. At the connection wall of the receiving device can in particular be a floor of a receiving shaft for the pump. A pressure connection, via which the pressure fluid flowing through the pressure outlet can be discharged, opens at the connecting wall of the receiving device. The outlet seal serves to establish a tight fluid connection between the pressure outlet of the pump and the pressure connection of the receiving device.

The pump can include a pressing device for applying a pressure force to the outlet seal. The pressure force acts axially on the outlet seal away from the assembly structure in order to press it into a sealing contact with the connecting wall. The mounting structure can in particular be set up to absorb the reaction force acting in the axial opposite direction.

In a first embodiment, the pump housing, which comprises at least the circumferential wall, the first end wall arranged on an axial end face of the circumferential wall and the second end wall arranged on the axially opposite end face of the circumferential wall, is axially movable relative to the mounting structure and axially on the mounting structure via the pressing device supported. In advantageous variants of the first embodiment, in which the pump housing and the mounting structure, optionally also the outlet seal, form a preassembled mounting unit, the pump housing can be kept axially movable on the mounting structure before installation at the installation location.

In a second embodiment, the outlet seal is instead axially movable relative to the pump housing and axially supported on the pump housing via the pressing device. In advantageous variants of the second embodiment, in which the pump housing and the outlet seal, the outlet seal can optionally also be an addition to the

Pump housing existing assembly structure, form a pre-assembled assembly unit, be held axially movable before assembly at the installation site on the pump housing and / or on the assembly structure.

In a third embodiment, the pump housing is axially movable relative to the mounting structure and the outlet seal relative to the pump housing. It is

Pump housing via the pressure device on the mounting structure or the

Outlet seal is axially supported by the pressure device on the pump housing. In the third embodiment, the pump housing can also be attached to the assembly structure via the pressing device and the outlet seal can be attached to the mounting structure Pump housing be axially supported, in advantageous variants of the third embodiment, in which the pump housing, the mounting structure and the outlet seal form a preassembled mounting unit, the pump housing are axially movable on the mounting structure and the outlet seal is axially movable on before installation at the installation location

Pump housing and / or held on the mounting structure.

When the pump is installed at the installation site, the pressure force presses the outlet seal against the connection wall of the mounting device in order to close the pressure outlet of the

To connect the pump housing and the pressure connection of the receiving device to one another and to separate them from the environment. If the pump is arranged in a receiving shaft of the receiving device, in particular a bottom of the receiving shaft can form the connecting wall. By means of the pressing device and the one generated by it

Pressure force is then ensured that the outlet seal is pressed against the bottom of the receiving shaft axially opposite the first end wall. The axial mobility of the outlet seal together with the pump housing relative to the mounting structure and / or relative to the pump housing, in combination with the axial pressing force that can be generated by the pressing device, ensures to an increased degree that the outlet seal despite the pressure outlet and the pressure connection of the receptacle despite the direction Component tolerances and / or installation tolerances of the receiving device and the pump and / or thermally induced changes in geometry and / or pressure-related axial movements of the pump housing as a whole or parts of the pump housing reliably seals.

If the pump housing is axially movable relative to the assembly structure, this will form

Pump housing and the mounting structure in preferred embodiments together a thrust joint, in which the mounting structure guides the pump housing axially movable. If the outlet seal is axially movable relative to the pump housing, in preferred embodiments the pump housing and the outlet seal form a thrust joint in which the pump housing guides the outlet seal in an axially movable manner. In versions in which the pump housing relative to the mounting structure and the outlet seal relative to the

Pump housings are each axially movable, both thrust joints can be realized. In simple and, not least, therefore advantageous designs, either only the pump housing can be moved axially relative to the mounting structure or only the outlet seal can be moved axially relative to the pump housing. The pressing device can comprise a spring device, which also includes the case that the pressing device is a spring device, ie from a

Spring device exists. The spring device can act pneumatically and / or mechanically. A mechanical spring device with one or more springs is preferred. Alternatively, the pressing force can be generated hydraulically, i.e. H. the pressing device can be formed as a purely hydraulic pressing device. The pressure device can in

Developments both a spring device and a hydraulic

Include pressing device.

By means of the spring device, the pump housing can be mounted with an axial pretension, thereby ensuring that the outlet seal is always pressed into an axial sealing contact with pretensioning force and the first end wall and / or the second end wall are pressed axially in the direction of the peripheral wall. The tightness can hereby be ensured at a standstill and thus immediately when the pump starts up, for example during a first start or a cold start. Using a hydraulic pressure device, the pressure force can be increased during operation of the pump, for example to compensate for a pressure in the delivery chamber on the high pressure side, which increases with the rotor speed, and the tightness of the pump housing and the sealing function of the outlet seal even at high speeds of the rotor and / or to ensure pressure peaks due to pressure pulsation. If the pressing device comprises a spring device and a hydraulic pressing device which is operated with pressurized fluid from the high pressure side of the pump, the spring device can be arranged with a pretensioning force which is sufficiently large to ensure tightness in the lower speed range in the warm operating state, i.e. with low-viscosity pressure fluid. The preload force can be so low that the outlet seal during a cold start and so on

highly viscous pressure fluid shows a certain leak, for example against the

The pressure force of the spring device lifts out of the sealing contact in order to reduce a pressure peak that typically occurs during a cold start.

If the pressure device comprises a spring device arranged with pretension, this is _. Pump housing on the mounting structure and / or the outlet seal on

Pump housing axially supported in all operating states of the assembled pump against the restoring pressing force of the pressing device. If the pressing device acts only pneumatically or only hydraulically, the pressing device can in particular do so

be set up so that it generates the pressure force only when the pump is operating. This happens all to designs in which a purely pneumatic or a purely hydraulic pressing device generates the pressing force as a function of the pressure of the pressure fluid delivered by the pump.

In versions in which the pump housing is axially movable relative to the mounting structure, regardless of the question of whether the pressing device is implemented purely hydraulically or hydraulically in combination with a spring device, the pump housing and the mounting structure can be used with one another or together with the receiving device to implement the hydraulic pressing device form a piston-cylinder unit with the pump housing as a piston. The hydraulic pressure acts on the pump housing and is axially supported on the mounting structure. In advantageous embodiments, the mounting structure surrounds the cylinder space of the piston-cylinder unit on the outer circumference, that is, encloses the cylinder space on the circumference, so that the pump housing and the

Assembly structure alone together form the piston-cylinder unit. Although less preferred, it is in principle also possible for the cylinder space to be obtained only in combination with the receiving device, in that the receiving device surrounds the cylinder space and delimits its circumference.

In versions in which the outlet seal is axially movable relative to the pump housing and the pressure device acts between the pump housing and the outlet seal, the outlet seal is supported in the axial direction via the pressure device on the pump housing. For these designs, it is advantageous if the pressing device is a spring device with one or more mechanical springs or at least comprises such a mechanical spring device. The outlet seal, which is axially movable relative to the pump housing, can act as a radial seal with respect to the pump housing and can seal the pressure outlet in cooperation with a peripheral wall of the pump housing surrounding the pressure outlet by forming a radial sealing gap with the peripheral wall of the pump housing. The axially movable outlet seal maintains the sealing gap with said peripheral wall of the pump housing over the axial distance of its mobility.

In versions in which tolerances and / or changes in geometry are not compensated for by means of a pump housing that is movable relative to the mounting structure, but only by means of an outlet seal that is axially movable relative to the pump housing, the mounting structure can be an integral part of the pump housing, for example of second end wall are formed. In preferred embodiments, however, the mounting structure is manufactured separately from the pump housing and forms a preassembled mounting unit with the pump housing, in which the pump housing is axially movable relative to the mounting structure.

The circumferential wall of the pump housing can be formed together with the first end wall or instead together with the second end wall in a process of primary shaping, optionally with post-processing. In advantageous embodiments, however, the peripheral wall, the first end wall and the second end wall are three separately shaped parts which are arranged axially next to one another. In such designs, the pump housing is constructed in layers. The end walls are pressed axially in the direction of the peripheral wall at least in the assembled state of the pump in order to tightly enclose the delivery chamber apart from a delivery chamber inlet on the low pressure side and a delivery chamber outlet on the high pressure side.

The first end wall is preferably located directly on a first end side of the

The peripheral wall and the second end wall are arranged directly on the opposite end face of the peripheral wall and are pressed axially against the peripheral wall, at least in the assembled state of the pump.

In advantageous designs, the pump housing and the mounting structure form a preassembled pump unit, i. H. an assembly unit. In such designs, the pump comprises a securing device with one or more holders, which ensures or together ensure the cohesion of the preassembled components of the pump. The assembly unit comprises at least the peripheral wall, the first

End wall and the second end wall of the pump housing, the rotor arranged in the pump housing and optional rotor blades. It is advantageous, if that

Outlet seal is a pre-assembled part of the assembly unit. So it can

Securing device, the outlet seal in a holding engagement of the holder and

Hold the outlet seal in place on the pump housing. Additionally or instead, the holder or the plurality of holders of the securing device can be in a holding engagement with the first end wall and hold the pump housing together in the preassembled state. The outlet seal can be held on the first end wall by means of a plug connection when the holding engagement is formed with the first peripheral wall. Is the outlet seal with the holder or the multiple holders of the Safety device in the holding engagement, it can additionally be held on the first end wall by means of a plug connection.

The pressing device is expediently an integrated part of the

Assembly unit. If the assembly structure is a component of the pump in addition to the pump housing, this assembly structure can also be a preassembled part of the

Assembly unit. It is advantageous if the components of the assembly unit are held in position relative to one another by means of the securing device such that the

Assembly unit for the purpose of assembly only with the outlet seal first pressed axially against the mentioned connecting wall of the receiving device and the

Assembly unit using the pre-assembled or externally provided

Mounting structure must be axially fixed to the receiving device in order to

Components of the pump for pump operation relative to each other and relative to

To position and fix the holder.

The provision of an assembly unit in which the pump housing and at least the outlet seal are held in position relative to one another in a preassembled state by means of a securing device, the securing device for this being in a holding engagement with the outlet seal, is also without realizing the axial compensation according to the invention and / or the invention

Pressure device is an advantage. However, there is one application, namely the

Spring device and / or the hydraulic pressure device, in preferred

Versions a component of the pre-assembled pump unit, d. H. of the

Assembly unit. The provision of the aforementioned components of the pump in the form of an assembly unit facilitates installation at the destination, i. H. the attachment to the receiving device. This is particularly beneficial for series production, as the

Pump components are not individually delivered to series production and only there as part of the assembly, for example the series assembly of motors or gearboxes.

must be assembled, but pre-assembled to the pump unit, typically at the manufacturer of the pump components, and accordingly made available for final assembly in series production as an assembly unit.

The pump can be designed with only a single work flow, that is to say a single flow. In preferred embodiments, the pump is of multi-flow design, for example double-flow, and accordingly has a first work flow and at least one further, second Flood of work. In multi-flow versions, the pressure outlet can be a pressure outlet common to the several working flows and the pump can accordingly be a multi-flow single circuit pump. More preferably, the pump in a multi-flow design is also designed as a multi-circuit pump and accordingly has, for different working floods, sealed, ie separate, pressure outlets. When the pump is designed as a multi-circuit pump, the pressure outlet already explained is a first pressure outlet only for the first working flood of the pump, while the pump for the at least one further, second working flood has its own, second pressure outlet, and these at least two pressure outlets are fluidly separated from one another.

When the pump is designed as a multi-circuit pump with the first pressure outlet and the second pressure outlet, the outlet seal can be shaped as a sealing unit which separates these two pressure outlets from one another and also from the low-pressure side of the pump. The outlet seal faces the second pressure outlet

expediently also the features disclosed above and also below for the one and the first pressure outlet, respectively. In versions as multi-circuit pumps, the pump has a first flood of work with the first pressure outlet and a second

Working flood with the second pressure outlet, which is separated from the first pressure outlet, the outlet seal can have a first sealing web for the first pressure outlet and a second sealing web for the second pressure outlet. The first sealing web surrounds the first pressure outlet in a sealing manner and separates the first pressure outlet from the low-pressure side of the pump and the second pressure outlet. The second sealing web surrounds the second pressure outlet and separates the second pressure outlet from the low pressure side of the pump and the first pressure outlet. In advantageous embodiments, the first sealing web and the second sealing web are connected to form a unit, they are preferred

together in a process of master shaping, for example in one

Plastic casting process, molded.

In advantageous embodiments, the outlet seal comprises a carrier structure made of, for example, a metallic material or plastic and a sealing structure made of a sealing material suitable for fulfilling the sealing function, such as

for example a rubber or, expediently, an elastomer material. The

Sealing material forms at least one sealing web running around the pressure outlet. In multi-circuit pump designs, the sealing structure formed from the sealing material comprises the first sealing web and the second sealing web. The sealing structure can, for example, be shaped as a protruding sealing flange or comprise such a sealing flange. Within the cross-section that the respective sealing web frames and in which the assigned pressure outlet opens, the support structure can have one or more passages, so that the support structure for the respective one

Pressure outlet forms a kind of aperture, for example pinhole. By means of one

Carrier structure can flow in the transition area between the pressure outlet and

Pressure connection can be reassured. The shape of the support structure can in particular be sheet-like, i. H. be an areal thin structure. It can simply be flat in the form of a disk, more preferably it has the shape of a flat cover or is three-dimensionally curved with one or more sealing flange (s) each acting as a sealing web and a bulge protruding from the respective sealing flange.

Those disclosed above and below with respect to the outlet seal

Features such as the presence of a support structure made of a first material and a more flexible sealing structure made of one

Sealing material, and / or the special design of the outlet seal for use as an outlet seal of a multi-circuit, for example two-circuit pump, are used in preferred embodiments in combination with the features of a pump according to the invention. On the other hand, however, these features are also fundamentally advantageous, that is to say also in the case of a pump in which the described axial relative mobility is not realized and / or an inventive one

Pressure device is not available. The subject of a separate application can also be an outlet seal as such, which is suitable for sealing a first flood and a second flood of a multi-circuit pump, preferably a rotary pump, and / or has a support structure which serves not only to support the sealing structure but also above it is also designed as a flow resistance to withstand pressure peaks at

Dismantle the pressure outlet.

It is therefore an object of the invention to provide an outlet seal for a pump which is suitable for performing several functions and is nevertheless easy to mount on a housing of the pump.

According to a first aspect, it is an object to provide an outlet seal for a multi-circuit pump. The outlet seal is intended to separate a first work flow and a second work flow of the pump from each other and from a low pressure side of the pump can. It should therefore perform a first sealing function in relation to the first flood of work and a second sealing function in relation to the second flood of work, but can nevertheless be easily installed.

According to a second aspect, it is an object to provide an outlet seal for a pump, the outlet seal being intended to perform a sealing function and to be able to contribute to the reduction of pressure peaks. Pressure peaks can typically occur during a cold start with viscous pressure fluid.

Another task is to create a pump with a multifunctional outlet seal.

According to the first aspect, the outlet seal for sealing an outlet area of a multi-circuit pump has a sealing structure made of a sealing material. The outlet area comprises a first pressure outlet and a second pressure outlet, which are fluidly separated from one another and also from one each by means of the outlet seal

Low pressure side of the pump should be separated. The sealing structure comprises a first sealing web, which has a first one which is provided for the first pressure outlet

Fluid passage of the outlet seal in an axial plan view of the outlet seal framed tightly, and a second sealing web, one for the second

Pressure outlet provided, in the plan view laterally next to the first fluid passage framed second fluid passage of the outlet seal in the plan view.

The at least two in the axial top view next to each other by one

Sealing webs encircling fluid passage are coherent as uniform

Shaped sealing structure and / or arranged on a support structure of the outlet seal, preferably molded on. In the first versions, the outlet seal includes a

Support structure, and the sealing webs are coherent, forming the sealing structure as a unit from the sealing material on the support structure. In the second

Versions, the outlet seal also includes a support structure, but the

Sealing webs are not connected, but separate from each other on the

Support structure arranged. In third versions, the sealing webs are made of

Sealing material is coherently shaped so that it is uniform

Form sealing structure, however, the outlet seal includes in addition to Sealing structure made of sealing material no support structure. All versions have in common that the outlet seal is provided as a mountable unit.

The fluid passages can each have a major axis in the axial plan view and a minor axis in the transverse direction orthogonal to the major axis and a greatest longitudinal extent parallel to the major axis and a greatest transverse extent parallel to the minor axis, the greatest longitudinal extent being greater than the greatest transverse extent. For example, the top view of the fluid passages can be oval or, in particular, each D-shaped and can be arranged next to one another in the transverse direction. By means of such a shape and arrangement of the fluid passages, an outer face of a pump housing which is at least substantially circular in the axial plan view can be used for the most part for the at least two fluid passages. If the fluid passages are D-shaped, their flat long sides are in the transverse direction

advantageously facing each other.

In preferred embodiments, the sealing webs are shaped such that they can form an axial seal in the assembled state with an external connection wall provided at the installation location of the pump. With the pump housing, the sealing webs or only one of the sealing webs can also have an axial seal based on axial sealing contact with an axial end face of the pump housing, or one on a radial one

Form sealing contact with a circumferential surface of the pump housing based radial seal. In a third variant, the sealing webs or, if appropriate, only one of the sealing webs with the pump housing can form both an axial seal and a radial seal.

The sealing structure can be arranged immovably on a pump housing relative to the latter or can be provided for such an arrangement. In such designs, it can be arranged, for example, in a correspondingly shaped receiving groove and / or can be integrally joined to the pump housing. In these versions, the sealing structure alone can form the outlet seal from the sealing material. In such designs, the outlet seal does not have to have a support structure. However, it can also be provided for an arrangement that is axially movable relative to a housing of the pump. Is the outlet seal for axial mobility relative to the

Provided pump housing or axially movably arranged on a pump housing, it can be shaped on its inner end face axially facing the pump housing be that it cooperates with an end face of the pump housing as an axial seal. Instead or in addition, it can act as a radial seal with a peripheral surface of the pump housing, preferably an inner peripheral surface, which always remains in radial sealing contact with the peripheral surface of the pump housing over the axial distance of the relative mobility.

With movable as well as immovable arrangement, it is advantageous if the

Outlet seal comprises a support structure in addition to the sealing webs made of sealing material, around the sealing webs relative to one another and during assembly relative to the

To keep the pump housing in position and / or to stiffen the outlet seal as a whole. In advantageous embodiments, the outlet seal is designed in such a way that it is held on the pump housing in a preassembled state of the pump by means of a plug connection in the area of the sealing webs. In advantageous embodiments, the plug connection or the frictional engagement is designed such that the outlet seal can be moved axially relative to the pump housing in the preassembled state of the pump and preferably also in the assembled state of the pump, even if the

The outlet seal acts as a pure axial seal, and even more so when the outlet seal is only or primarily intended for radial sealing contact with the pump housing.

Features of the invention will also become apparent in the aspects formulated below

described. The aspects are formulated in the type of claims and can replace them. Features disclosed in the aspects can further supplement and / or relativize the claims, point out alternatives to individual features and / or

Extend claim characteristics. Reference numerals in parentheses relate to exemplary embodiments of the invention illustrated below in figures. They do not restrict the features described in the aspects under the word sense as such, but on the other hand show preferred options for realizing the respective feature.

Aspect 1. Pump for supplying a unit, for example a transmission, with a pressure fluid, the pump comprising:

1.1 a pump housing (1) with a peripheral wall (2) which surrounds a delivery chamber (5) of the pump, a first end wall (3) and a second end wall (4; 40) which delimit the delivery chamber (5) on their end faces, 1.2 a rotor (10) which is rotatable in the delivery chamber (5) about an axis of rotation (R) to form delivery cells which increase and decrease periodically as the rotor (10) rotates, to pressurized fluid from a low-pressure side of the pump to a high-pressure side of the pump to promote,

1.3 a pressure outlet (8) which opens at an outer end face of the first end wall (3) facing away from the delivery chamber (5) and can be removed from the delivery chamber (5) by the pressure fluid, and

1.4 an outlet seal (14; 44) which is provided on the outer end face of the first end wall (3) for sealing the pressure outlet (8),

1.5 wherein the pump housing (1) can be mounted on a receiving device (35) by means of a mounting structure (20; 40, 41) and the mounting structure (20; 40, 41) is a component of the pump or the receiving device (35).

Aspect 2. Pump according to the preceding aspect, wherein the pump housing (1) can be mounted on the receiving device (35) by means of the mounting structure (20; 40, 41), so that the first end wall (3) of a connecting wall (37) of the receiving device ( 35) is axially facing.

Aspect 3. Pump according to one of the preceding aspects, the mounting structure (20) having an axial cylindrical guide (23) which surrounds the pump housing (1) in the region of the second end wall (4), preferably only the second end wall (4) and the pump housing (1) leads axially movable.

Aspect 4. Pump according to one of the preceding aspects, wherein the mounting structure (20) surrounds the pump housing (1) and / or the pump housing (1) the mounting structure (20) in the region of the second end wall (4) with an axial overlap and the mounting structure ( 20) the pump housing (1) in the area of the overlap in a sliding contact axially movable.

Aspect 5. Pump according to one of the preceding aspects, wherein the pump housing (1) with the mounting structure (20) is a piston-cylinder arrangement with the

Pump housing (1) as a piston and the mounting structure (20) as a cylinder.

Aspect 6. Pump for supplying a unit, for example a transmission, with a pressure fluid, the pump preferably being formed according to one of the preceding claims, the pump comprising:

6.1 a pump housing (1) with a peripheral wall (2) which surrounds a delivery chamber (5) of the pump, a first end wall (3) and a second end wall (4; 40) which delimit the delivery chamber (5) at their end faces, 6.2 a rotor (10) which is rotatable in the delivery chamber (5) about an axis of rotation (R) to form delivery cells which increase and decrease periodically as the rotor (10) rotates, to supply pressure fluid from a low pressure side of the pump to a high pressure side of the pump to promote,

6.3 a pressure outlet (8) which opens on an outer end face of the first end wall (3) facing away from the delivery chamber (5) and can be removed from the delivery chamber (5) by the pressure fluid,

6.4 wherein the pump is optionally multi-flow and a first flood with the pressure outlet as the first pressure outlet (8) and a second flood with a second pressure outlet (9) which is located on the outer end face of the first end wall (3) next to the first pressure outlet (8) flows, exhibits, and

6.5 an outlet seal (14; 44) which is provided on the outer end face of the first end wall (3) for sealing the pressure outlet (8) and, if present, also the second pressure outlet (9).

Aspect 7. Pump according to the preceding aspect, the pump housing (1) being mountable to a receiving device (35) by means of a mounting structure (20; 40, 41) and the mounting structure (20; 40, 41) being a component of the pump or the

Receiving device (35).

Aspect 8. Pump according to one of the preceding aspects, the mounting structure (20) guiding or guiding the pump housing (1) and / or the pump housing (1) in an axially movable manner.

Aspect 9. Pump according to one of the preceding aspects, wherein the pump housing (1) with the mounting structure (20) and / or with the outlet seal (44) forms a thrust joint (1, 20; 1, 44) with axial mobility or in each case.

Aspect 10. Pump according to one of the preceding aspects, further comprising a pressing device (30; 45) for applying an axial pressure force to the outlet seal (14; 44) for pressing the outlet seal (14; 44) against one in the assembled state of the outer end face of the first end wall (3) axially

Opposing connection wall (37) of the receiving device (35).

Aspect 11. Pump according to the previous aspect, wherein

- The pump housing (1) is axially movable relative to the mounting structure (20) and is axially supported on the mounting structure (20) via the pressing device (45) and / or

- The outlet seal (44) is axially movable relative to the pump housing (1) and is axially supported on the pump housing (1) via the pressing device (45). Aspect 12. Pump according to one of the two immediately preceding aspects, wherein the pump housing (1) is or can be moved axially relative to the mounting structure (20) and / or the outlet seal (44) relative to the pump housing (1) and the

Outlet seal (44) is axially supported by the push-on device (45) on the mounting structure (20; 41).

Aspect 13. Pump according to one of the preceding aspects in combination with aspect 10, wherein the pressing device (30; 45) a pressure chamber (31) for generating the pressing force by means of hydraulic pressure and / or a spring device (33; 45) for generating the pressing force by means of Includes spring force.

Aspect 14. Pump according to the preceding aspect, wherein the spring device (33) is arranged in the pressure chamber (31).

Aspect 15. Pump according to one of the preceding aspects in combination with aspect 10, wherein the pressing device (30; 45) comprises a spring device (33; 45) which extends in the axial direction between the pump housing (1) and the mounting structure (20) or between the pump housing (1) and the outlet seal (44) act to generate a spring force which forms at least part of the pressing force.

Aspect 16. Pump according to one of the three immediately preceding aspects, wherein the spring device (33; 45) comprises at least one spring supported on an end wall (21) of the mounting structure (20) or on the first end wall (3) of the pump housing (1), wherein the at least one spring is preferably supported directly on the end wall (21) of the mounting structure (20) or the first end wall (3) of the pump housing (1).

Aspect 17. Pump according to one of the preceding aspects in combination with aspect 10, wherein the pressure device (30) comprises a pressure chamber (31) which is axially delimited by the pump housing (1) and can be acted upon by pressure fluid on the high pressure side, so that a pressure Pressure chamber (31) generates pressure axially acting away from the mounting structure (20) on the pump housing (1).

Aspect 18. Pump according to the preceding aspect, wherein an end wall (21) of the mounting structure (20) axially delimits the pressure chamber (33).

Aspect 19. Pump according to one of the preceding aspects in combination with aspect 13, wherein the pressure chamber (31) is permanently connected to the high pressure side of the pump or connected to a check valve or control valve and can be connected via the check valve or control valve to the high pressure side of the pump and from this is separable. Aspect 20. Pump according to one of the preceding aspects in combination with aspect 13, wherein the pressure chamber (31) is connected to a check valve or control valve and the pressure can be relieved via the check valve or control valve.

Aspect 21. Pump according to one of the preceding aspects in combination with aspect 13, wherein the pressure chamber (31) inside the pump housing (1) with the

High pressure side of the delivery chamber (5) is connected.

Aspect 22. Pump according to one of the preceding aspects, the outlet seal (14) to the pump housing (1) acting as an axial seal, which bears against an outer end face of the first end wall (3) and an axial one with the outer end face of the first end wall (3) Forms a sealing gap which surrounds the pressure outlet (8) or the first pressure outlet (8).

Aspect 23. Pump according to the preceding aspect, wherein the outlet seal (14) lies loosely in axial pressure contact on the outer end face of the first end wall (3) or is integrally formed on the first end wall (3), for example in one

Plastic casting process.

Aspect 24. Pump according to one of the preceding aspects, the outlet seal (44) to the pump housing (1) acting as a radial seal which is connected to a

The inner circumferential surface of the first end wall (3) forms a radial sealing gap in sliding contact, which surrounds the pressure outlet (8) or the first pressure outlet (8).

Aspect 25. Pump according to one of the preceding aspects, wherein the first end wall (3) of the pump housing (1) surrounds the outlet seal (44) and / or the outlet seal (44) the first end wall (3) of the pump housing (1) with an axial overlap and the pump housing (1) guides the outlet seal (44) axially movably in the region of the overlap in a sliding contact.

Aspect 26. Pump according to one of the preceding aspects, the pump having a multiple flow and having a first flow with the pressure outlet as the first pressure outlet (8) and a second flow with a second pressure outlet (9) which is on the outer end face of the first end wall (3) opens next to the first pressure outlet (8).

Aspect 27. Pump according to the preceding aspect, wherein the outlet seal (14;

44) the second pressure outlet (9) also on the outer face of the first

Seals end wall (3).

Aspect 28. Pump according to the preceding aspect, wherein the outlet seal (14;

44) comprises a first sealing web (18) and a second sealing web (19), the first sealing web (18) sealingly surrounds the first pressure outlet (8) and from which

Low pressure side of the pump and the second pressure outlet (9) separates and the second Sealing web (19) surrounds the second pressure outlet (9) and separates it from the low pressure side of the pump and the first pressure outlet (8).

Aspect 29. Pump according to the preceding aspect, wherein the sealing webs (18, 19) are connected to one another, preferably formed together as a unit.

Aspect 30. Pump according to the preceding aspect, the first end wall (3) of the pump housing (1) having a passage in a radially central region for mounting a drive shaft (12) of the rotor (10) and / or for lubricating oil for lubricating the drive shaft ( 12) and the first sealing web (18) separates the first pressure outlet (8) from the passage and the second sealing web (19), if present, separates the second pressure outlet (9) from the passage.

Aspect 31. Pump according to one of the three immediately preceding aspects, the first sealing web (18) and the second sealing web (19) having a common one

Sealing web section (18a) having an inner end near the axis of rotation (R) and a peripheral end remote from the axis of rotation (R) and the common sealing web section (18a) extends between the first pressure outlet (8) and the second pressure outlet (9).

Aspect 32. Pump according to one of the preceding aspects, the outlet seal (14; 44) being a sealing structure (16) made of a flexible sealing material, for example a rubber or elastomer material, for sealing the pressure outlet (8) and / or the second pressure outlet (9 ), if available.

Aspect 33. Pump according to one of the preceding aspects, the outlet seal (14; 44) comprising a support structure (15), preferably a three-dimensionally curved, thin support structure (15), and a seal structure (16) connected to the support structure (15) Sealing material, for example a rubber or elastomer material, for sealing the pressure outlet (8) and / or the second pressure outlet (9), if present, comprises.

Aspect 34. Pump according to the preceding aspect, wherein the support structure (15) axially opposite one or more passages (15e), preferably a plurality of hole-like passages (15e), to the pressure outlet (8) and / or the second pressure outlet (9), if present. , so that the support structure (15) has a

Flow resistance for through the pressure outlet (8) and / or the second

Pressure outlet (9) from the delivery chamber (5) forms flowing pressure fluid.

Aspect 35. Pump according to one of the two immediately preceding aspects, the sealing material being injection-molded onto the carrier structure (15) in the form of the sealing structure (16) in an injection molding process or the carrier structure (15) in one Injection molding process with the sealing material in the form of the sealing structure (16) is encapsulated.

Aspect 36. Pump according to one of the preceding aspects, the outlet seal (14; 44) being arranged on an outer end face of the first end wall (3) of the pump housing (1) and in an axial top view the pressure outlet (8) and / or the second Pressure outlet (9), if present, surrounds the outer end face of the first end wall (3).

Aspect 37. Pump according to one of the preceding aspects, the outlet seal (14) axially abutting an outer end face of the first end wall (3) of the pump housing (1), around the first pressure outlet (8) and / or the second pressure outlet (9) seal, if present, in an axial sealing contact with the first end wall (3).

Aspect 38. Pump according to one of the preceding aspects, wherein the outlet seal (14 ') surrounds an outer circumferential surface of the pump housing (1) surrounding the pressure outlet (8) and / or the second pressure outlet (9), if present, in an all-round manner to seal the respective pressure outlet (8, 9) in a radial sealing contact with the pump housing (1).

Aspect 39. Pump according to one of the preceding aspects, wherein the first end wall (3) of the pump housing (1) has a depression (3a) or first depression (3a) on an outer end face, the pressure outlet (8) or the first pressure outlet (8) opens into this recess (3a) and the outlet seal (14; 44) protrudes into this recess (3a).

Aspect 40. Pump according to the preceding aspect, the outlet seal (14;

44) is inserted into the depression (3a) or first depression (3a).

Aspect 41. Pump according to one of the two immediately preceding aspects, wherein the outlet seal (14) forms an axial sealing gap surrounding the pressure outlet (8) or first pressure outlet (8) and the depression (3a) or first depression (3a), around which Seal pressure outlet (8) or first pressure outlet (8).

Aspect 42. Pump according to one of the three immediately preceding aspects, the outlet seal (44) forming, with an inner circumferential surface of the depression (3a) or first depression (3a), a radial sealing gap surrounding the pressure outlet (8) or the first pressure outlet (8), around the pressure outlet (8) or first

Seal the pressure outlet (8).

Aspect 43. Pump according to one of the four immediately preceding aspects, wherein the first end wall (3) of the pump housing (1) has a further, second depression (3b) on the outer end face, the second pressure outlet (9) into the second depression (3b ) opens and the outlet seal (14; 44) protrudes into the second recess (3b), is preferably inserted into the second recess (3b).

Aspect 44. Pump according to the preceding aspect, the outlet seal (14;

44) is inserted into the second recess (3b).

Aspect 45. Pump according to one of the two immediately preceding aspects, the outlet seal (14) forming an axial sealing gap surrounding the second pressure outlet (9) and the second depression (3b) in order to seal the second pressure outlet (9).

Aspect 46. Pump according to one of the three immediately preceding aspects, the outlet seal (44) with an inner circumferential surface of the second depression (3b) forming a further radial sealing gap surrounding the second pressure outlet (9) in order to seal the second pressure outlet (9).

Aspect 47. Pump for supplying an assembly, for example a transmission, with a pressure fluid, the pump preferably being formed according to one of the preceding claims, the pump comprising:

47.1 a pump housing (1) with a peripheral wall (2) which surrounds a delivery chamber (5) of the pump, a first end wall (3) and a second end wall (4; 40) which delimit the delivery chamber (5) on their end faces,

47.2 a rotor (10) which is rotatable in the delivery chamber (5) about an axis of rotation (R) to form delivery cells which increase and decrease periodically as the rotor (10) rotates, to supply pressure fluid from a low-pressure side of the pump to a high-pressure side of the pump to promote,

47.3 a pressure outlet (8) which opens at an outer end face of the first end wall (3) facing away from the delivery chamber (5) and can be removed from the delivery chamber (5) by the pressure fluid,

47.4 an outlet seal (14; 44) which is provided on the outer end face of the first end wall (3) for sealing the pressure outlet (8),

47.5 optionally attaching the pump to a receiving device (35)

serving mounting structure (20; 40, 41), which can be provided in addition to the pump housing (1) or can be formed by the second end wall (40), and

47.6 a holder (27) which is in a holding engagement with the outlet seal (14; 44) and which covers the peripheral wall (3) and the end walls (2, 4) and

Assembly structure (20; 40, 41), if this is provided in addition to the second end wall (4), positioned relative to one another and held together axially by means of the holding engagement as a pre-assembled assembly unit. Aspect 48. Pump for supplying a unit, for example a transmission, with a pressure fluid, the pump preferably being formed according to one of the preceding claims, the pump comprising:

48.1 a pump housing (1) with a peripheral wall (2) which surrounds a delivery chamber (5) of the pump, a first end wall (3) and a second end wall (4; 40) which delimit the delivery chamber (5) on their end faces,

48.2 a rotor (10) which is rotatable in the delivery chamber (5) about an axis of rotation (R) to form delivery cells which increase and decrease periodically as the rotor (10) rotates, to supply pressure fluid from a low-pressure side of the pump to a high-pressure side of the pump to promote,

48.3 a pressure outlet (8) which opens at an outer end face of the first end wall (3) facing away from the delivery chamber (5) and can be removed from the delivery chamber (5) by the pressurized fluid,

48.4 optionally an outlet seal (14; 44) which is provided on the outer end face of the first end wall (3) for sealing the pressure outlet (8),

48.5 a resistance structure (15) which is provided on the outer end face of the first end wall (3) immediately downstream of the pressure outlet (8) in order to form a flow resistance for pressure fluid flowing out of the pressure outlet (8) to reduce pressure peaks,

48.6 optionally attaching the pump to a receiving device (35)

48.7 a with wide rsta nd structure (15) in a holding engagement holder (27), the peripheral wall (3) and the end walls (2, 4) and the mounting structure (20; 40, 41), if this in addition to second end wall (4) is provided, positioned relative to one another and preassembled by means of the holding engagement

Assembly unit holds together axially.

Aspect 49. Pump according to the preceding aspect, the resistance structure (15) being part of the outlet seal (14; 44) and in particular being able to form the support structure (15) described in one of the aspects 33 to 35, 77, 102 and 103.

Aspect 50. Pump according to aspect 48, the resistance structure (15) being provided separately from the outlet seal (14; 44).

Aspect 51. Pump for supplying a unit, for example a transmission, with a pressure fluid, the pump preferably being formed according to one of the preceding claims, the pump comprising: 51.1 a pump housing (1) with a peripheral wall (2) which surrounds a delivery chamber (5) of the pump, a first end wall (3) and a second end wall (4; 40) which delimit the delivery chamber (5) on their end faces,

51.2 a rotor (10) which is rotatable in the delivery chamber (5) about an axis of rotation (R) to form delivery cells, which increase and decrease periodically as the rotor (10) rotates, to supply pressure fluid from a low-pressure side of the pump to a high-pressure side of the pump to promote,

51.3 a pressure outlet (8) which opens at an outer end face of the first end wall (3) facing away from the delivery chamber (5) and can be removed from the delivery chamber (5) by the pressure fluid,

51.4 an outlet seal (14; 44) which is provided on the outer end face of the first end wall (3) for sealing the pressure outlet (8),

51.5 optionally one of attaching the pump to a receiving device (35)

51.6 a holder (27) which is in a holding engagement with the first end wall (3) and which holds the peripheral wall (3) and the end walls (2, 4) and the mounting structure (20; 40, 41), if this is in addition to the second end wall ( 4) is provided, positioned relative to one another and pre-assembled by means of the holding engagement

Assembly unit holds together axially.

Aspect 52. Pump according to one of the preceding aspects, the outlet seal (14; 44) being connected to the first end wall (3) in an axially frictional manner by means of a plug connection.

Aspect 53. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, wherein the holder (27) the peripheral wall (3) and the

End walls (2, 4) and the mounting structure (20; 40, 41), if this is provided in addition to the second end wall (4), positioned relative to each other in holding engagement with (i) the outlet seal (14; 44) or (ii) the Resistance structure (15) or (iii) of the first end wall (3) in a loose connection as the pre-assembled assembly unit holds together axially.

Aspect 54. Pump according to the preceding aspect, the outlet seal (14 ″) being connected in a loose connection only to the first end wall (3 ″) by means of the plug connection.

Aspect 55. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, wherein the holder (27) in the axial direction of the Assembly structure (20), if this is additionally provided, or the second end wall (40) protrudes into the holding engagement and is preferably immovably connected to the assembly structure (20), if this is additionally provided, or the second end wall (40).

Aspect 56. Pump according to one of the preceding aspects in combination with one of the aspects 47, 48 and 51, the holder (27) engaging behind the outlet seal (14; 44) in the holding engagement with respect to the axial direction and thereby axially holding the assembly unit together.

Aspect 57. Pump according to one of the preceding aspects in combination with one of the aspects 47, 48 and 51, the outlet seal (14; 44) having an axial passage (15c) and the holder (27) at least up to the passage (15c) protrudes and the outlet seal (14; 44) axially immediately behind the passage (15c) or in

Passes behind (15c) in the holding engagement with respect to the axial direction.

Aspect 58. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, wherein the holder (27) holds the outlet seal (14; 44) in holding engagement from the side, namely an outer circumference and / or an inner circumference the outlet seal (14; 44), with respect to the axial direction.

Aspect 59. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, wherein an engagement element (15d; 16d) of the outlet seal (14; 44) and an engagement counter-element (29) of the holder (27) in the holding engagement are.

Aspect 60. Pump according to the preceding aspect, wherein the engagement element (15d;

16d) engages behind the engaging counter-element (29) with respect to the axial direction.

Aspect 61. Pump according to one of the two immediately preceding aspects, wherein the engagement element (15d; 16d) holds a barb for the

Forming mating element (29).

Aspect 62. Pump according to one of the three immediately preceding aspects, wherein the engagement element (15d; 16d) and / or the engagement counter-element (29) is or are flexible in the radial direction against elastic restoring force, so that the respective elastic restoring force is applied when the holding engagement is produced radial yielding and then an automatic radial snap or widen the

Engagement elements (15d; 16d) and / or the engagement counter-element (29) in the

Hold intervention causes. Aspect 63. Pump according to the preceding aspect, the engagement element (15d; 16d) of the outlet seal (14; 44) being flexible in the radial direction against elastic restoring force.

Aspect 64. Pump according to one of the two immediately preceding aspects, wherein the mating engagement element of the holder is flexible in the radial direction against elastic restoring force.

Aspect 65. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, wherein an engagement element (15d; 16d) of the outlet seal (14; 44) and an engagement counter-element (29) of the holder (27) in the holding engagement are and the holder (27) in an axial end portion, which comprises a free axial end of the holder (27), the mating element (29) in the form of a radial Abrag ung or circumferential radial widening (29).

Aspect 66. Pump according to one of the preceding aspects, wherein the holder (27) is elongated in the axial direction, preferably in the form of a pin or rod, has a free axial end and is axially close to the holding engagement at the free end or the free end.

Aspect 67. Pump according to one of the preceding aspects in combination with one of the aspects 47, 48 and 51, the outlet seal (14; 44) in addition to the

Holding engagement on the first end wall (3) is frictionally held, preferably by means of an axial plug connection of the outlet seal (14; 44) and the first end wall (3).

Aspect 68. Pump according to the preceding aspect, the holder (27) axially projecting behind an outer end face of the outlet seal (14; 44) which faces axially away from the pump housing (1).

Aspect 69. Pump according to one of the preceding aspects in combination with one of the aspects 47, 48 and 51, wherein the holding engagement consists of a frictional connection and / or a positive connection.

Aspect 70. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, the holder (27) following the peripheral wall (2) and the first end wall (3) in holding engagement with the outlet seal (14; 44) pointing downwards on the second end wall (40) or the pump housing (1) with the outlet seal (14; 44) pointing downwards on the mounting structure (20), if this is additionally provided, hanging against gravity in order to position the pump housing ( 1) on the receiving device (35).

Aspect 71. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, the holder (27) extending axially through the peripheral wall (2) of the pump housing (1), optionally also through the first end wall (3) and / or the second end wall (4) of the pump housing (1).

Aspect 72. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, wherein the holder (27) the peripheral wall (2) and the

End walls (3, 4), optionally also the outlet seal (14; 44), in relation to the

Positioned circumferentially relative to each other.

Aspect 73. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, wherein a further holder (27), the holder (27) according to one of the preceding aspects, is provided accordingly and with the outlet seal (14; 44) is in a further holding engagement, the holder (27) the peripheral wall (3) and the end walls (2, 4) and the mounting structure (20; 40, 41), if this is provided in addition to the second end wall (4), relative to one another position and hold together axially by means of the respective holding engagement in a loose connection as a pre-assembled assembly unit.

Aspect 74. Pump according to one of the preceding aspects in combination with one of the aspects 47, 48 and 51, the peripheral wall (2) and / or the first end wall (3) and / or the outlet seal (14; 44) from the holder (27 ) is or will be guided axially.

Aspect 75. Pump according to one of the preceding aspects in combination with one of the aspects 47, 48 and 51, the mounting structure (20; 40, 41) on one

Receiving device (35), preferably an assembly to be supplied with the pressurized fluid, is axially fixed and the outlet seal (14; 44) is pressed against an axially facing connecting wall (37) of the receiving device (35) into an axial sealing contact with the connecting wall (37) .

Aspect 76. Pump according to one of the preceding aspects in combination with one of the aspects 47, 48 and 51, the outlet seal (14; 44) being a support structure (15) made of a support material, preferably a three-dimensionally curved, thin

Carrier structure (15), and a sealing structure (16) made of a sealing material, for example a rubber or elastomer material, connected to the carrier structure (15) for sealing the pressure outlet (8), and the carrier structure (15) and / or the sealing structure (16 ) with the holder (27) in the holding engagement.

Aspect 77. Pump according to one of the preceding aspects, wherein the outlet seal (14; 44) for sealing a first pressure outlet (8) and an optional second pressure outlet (9) of the pump has a sealing structure (16) made of a sealing material, the sealing structure (16 ) full: 77.1 a first sealing web (18) which surrounds a first fluid passage (18a) of the outlet seal (14; 44) provided for the first pressure outlet (8) in an axial plan view of the outlet seal,

77.2 optionally a second sealing web (19) which, in plan view, frames a second fluid passage (19a) of the outlet seal (14; 44), which is optionally located laterally next to the first fluid passage (18a), and

77.3 a carrier structure (15) which is fixedly connected to the sealing structure (16) and which extends in plan view into the first fluid passage (18a) in order to provide a flow resistance in the region of the first fluid passage (18a) for through the first fluid passage (18a) to form flowing pressure fluid

77.4 wherein the holder (27) and, if present, also the further holder according to aspect 20 with the support structure (15) and / or the sealing structure (16) is or are in the respective holding engagement.

Aspect 78. Pump according to one of the preceding aspects, wherein the pump housing (1) on the mounting structure (20) and / or the outlet seal (44) on the pump housing (1) is or are axially movable in the holding engagement.

Aspect 79. Pump according to one of the preceding aspects, the pump housing (1) and the outlet seal (14; 44) being preassembled in position in relation to one another in the assembly unit.

Aspect 80. Pump according to the preceding aspect, wherein the second end wall (4) of the pump housing (1) forms the mounting structure (40, 41) or the mounting structure (20) is additionally provided and pre-assembled in position with respect to the pump housing (1) in the mounting unit .

Aspect 81. Pump according to one of the preceding aspects, the outlet seal (14; 44) being secured axially in a pre-assembled state relative to the pump housing (1) in a certain position, preferably being held in a form-fitting and / or frictional manner.

Aspect 82. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, wherein the holder (27) extends axially through the first end wall (3) of the pump housing (1).

Aspect 83. Pump according to one of the preceding aspects in combination with one of the aspects 47, 48 and 51, the holder (27) extending axially through the second end wall (4) of the pump housing (1). Aspect 84. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, wherein the holder (27) extends axially through the peripheral wall (2) of the pump housing (1).

Aspect 85. Pump according to one of the preceding aspects in combination with one of aspects 47, 48 and 51, wherein the holder (27) guides the pump housing (1) in an axially movable manner.

Aspect 86. Pump according to one of the preceding aspects, the peripheral wall (2), the first end wall (3) and the second end wall (4) of the pump housing (1) being manufactured separately from one another and arranged axially next to one another, preferably in one loose axial face contact directly against each other.

Aspect 87. Pump according to one of the preceding aspects in combination with aspect 10, wherein the first end wall (3) of the pump housing (1) relative to the peripheral wall (2) and / or the second end wall (4) of the pump housing (1) relative to the peripheral wall

(2) against the force of the pressing device (30) is axially movable or in each case.

Aspect 88. Pump according to one of the preceding aspects, wherein the first end wall

(3) of the pump housing (1) is loosely pressed against a first end face of the peripheral wall (2) and / or the second end wall (4) of the pump housing (1) is loosely pressed against a second end face of the peripheral wall (2).

Aspect 89. Pump according to one of the preceding aspects, wherein the first end wall (3) of the pump housing (1) and / or the second end wall (4) of the pump housing (1) and / or an end wall (21) of the mounting structure (20) Mount the rotor (10) rotatably about the axis of rotation (R) or store together.

Aspect 90. Pump according to one of the preceding aspects, the mounting structure (20) sealingly surrounding the second end wall (4) of the pump housing (1), forming a radial sealing gap.

Aspect 91. Pump according to one of the preceding aspects, wherein the mounting structure (20) comprises one or more fastening elements (29) for fastening the pump to a receiving device (35).

Aspect 92. Pump according to one of the preceding aspects, wherein the mounting structure (20; 40, 41) is axially fixed to a receiving device (35), preferably an assembly to be supplied with the pressurized fluid, and the pressures in the direction (30; 45) the outlet seal (14; 44) against an axially facing connection wall (37) of the

Presses the receiving device (35). Aspect 93. Pump according to the preceding aspect in combination with aspect 10, wherein the pressing device (30) pushes the pump housing (1) with the outlet seal (14) in the direction of the connection wall (37) and thereby the outlet seal (14) against the connection wall ( 37) presses.

Aspect 94. Pump according to one of the two immediately preceding aspects, the outlet seal (14; 44) acting as an axial seal with respect to the connection wall (37).

Aspect 95. Pump according to one of the three immediately preceding aspects, the pump housing (1) projecting axially from the mounting structure (20) into a receiving shaft (36) of the receiving device (35).

Aspect 96. Pump according to one of the four immediately preceding aspects, wherein the receiving device (35) has a pressure channel which opens at the connection wall (37) to form a pressure connection (38) for the pressure outlet (8), and wherein the outlet seal (14; 44) surrounds the pressure outlet (8) of the pump housing (1) and the pressure connection (38) of the receiving device (35) in a sealing manner.

Aspect 97. Pump according to the preceding aspect in combination with aspect 26, the receiving device (35) having a further pressure channel which opens at the connection wall (37), around a pressure connection (39) for the second

Form pressure outlet (9), and wherein the outlet seal (14; 44), the second pressure outlet (9) of the pump housing (1) and the pressure connection (39)

Receiving device (35) surrounds sealing.

Aspect 98. Pump according to one of the preceding aspects, the pump being a vane pump and comprising one or more vanes (11) which are coupled to the rotor (10) for rotary driving in order to form the delivery cells (6).

Aspect 99. Pump according to one of the preceding aspects, the pump being as

Gear pump is used to supply a gear with the pressure fluid as the working fluid and / or as a lubricant.

Aspect 100. Pump according to one of the preceding aspects, the pump being of

a drive motor of a vehicle or an electric motor provided in addition to the drive motor of the vehicle and serves to supply the drive motor and / or a transmission of the vehicle with the pressurized fluid as working fluid and / or as a lubricant.

Aspect 101. Pump according to one of the preceding aspects, wherein the pump is driven by a shaft of a device for generating electrical energy and serves to supply a transmission of the device with the pressure fluid as working fluid and / or as a lubricant. Aspect 102. Pump according to one of the preceding aspects, a relief channel (5a) opening on an outer surface of the first end wall (3), preferably on the outer end surface of the first end wall (3), which connects the low-pressure side of the delivery chamber (5) with the connects external environment of the pump housing (1).

Aspect 103. Pump according to the preceding aspect, wherein the relief channel (5a) on the outer end face of the first end wall (3) next to the sealing web (18), in a multi-flow design of the pump in an axial top view, preferably between the first sealing web (18) and the second sealing web (19) opens.

Aspect 104. Outlet seal used to seal a first pressure outlet (8) and a second pressure outlet (9) of a pump and to separate the first

Pressure outlet (8) from the second pressure outlet (9) has a sealing structure (16) made of a sealing material, the sealing structure (16) comprising:

• a first sealing web (18) which surrounds a first fluid passage (18a) of the outlet seal (14; 44) provided for the first pressure outlet (8) in an axial plan view of the outlet seal, and

• a second sealing web (19), the one for the second in plan view

Pressure outlet (9), laterally adjacent to the first fluid passage (18a), surrounds the second fluid passage (19a) of the outlet seal (14; 44) tightly,

• wherein the sealing structure (16) the sealing webs (18, 19) connected as

Unit forms and / or the outlet seal (14; 44) comprises a support structure (15) on which the sealing webs (18, 19) are arranged.

Aspect 105. Outlet seal which has a sealing structure (16) made of a sealing material for sealing a first pressure outlet (8) and an optional second pressure outlet (9) of a pump, the sealing structure (16) comprising:

A first sealing web (18) which surrounds a first fluid passage (18a) of the outlet seal (14; 44) provided for the first pressure outlet (8) in an axial plan view of the outlet seal,

• optionally a second sealing web (19) which, in plan view, surrounds a second fluid passage (19a) of the outlet seal (14; 44), which is optionally located laterally next to the first fluid passage (18a), and

• a support structure (15) which is fixedly connected to the sealing structure (16) and which extends in the plan view into the first fluid passage (18a) to in the area of the first fluid passage (18a) to form a flow resistance for pressure fluid flowing through the first fluid passage (18a).

Aspect 106. Outlet seal according to the previous aspects, the first

Sealing web (18) and the second sealing web (19) are each D-shaped in plan view, in each case a flat web section and one of the flat web section

have bulging web section and with their flat web sections facing each other, the flat web sections being able to form a common sealing web section (17) over at least part of their extent.

Aspect 107. Outlet seal according to one of the preceding aspects, the first sealing web (18) and the second sealing web (19) having a common sealing web section

(17).

Aspect 108. Outlet seal according to one of the two immediately preceding aspects, wherein the common sealing web section (17) extends in plan view from a peripheral section end in the direction of a central region of the outlet seal (14; 44) to a central section end.

Aspect 109. Outlet seal according to the preceding aspect, the first sealing web

(18) and the second sealing web (19) at the central section end of the common sealing web section (17) converge to frame the respective fluid passage (18a, 19a).

Aspect 1 10. Outlet seal according to one of the two immediately preceding aspects, wherein the sealing webs (18, 19) diverge in plan view at the peripheral section end of the common sealing web section (17).

Aspect 1 11. Outlet seal according to one of the five immediately preceding aspects, the flat sealing web sections or the common sealing web section (17) extend or extends between the first fluid passage (18a) and the second fluid passage (19a).

Aspect 1 12. Outlet seal according to one of the six immediately preceding aspects, the first sealing web (18) and the second sealing web (19) running together in a B-shape in plan view.

Aspect 1 13. Outlet seal according to one of the seven immediately preceding aspects, the first sealing web (18) and the second sealing web (19) being arranged in a plan view, forming a passage (17a) remaining between the sealing webs (18, 19) at a distance from one another extend towards the periphery of the outlet seal (14; 44). Aspect 114. Outlet seal according to the preceding aspect, the first sealing web (18) and the second sealing web (19) being in a plan view from the central one

Section end from the peripheral section end of the common

Sealing web section (17) pointing to form the passage (17a) at a distance next to each other in the direction of the periphery of the outlet seal (14; 44).

Aspect 1 15. Outlet seal according to one of the two immediately preceding aspects, the passage (17a) up to the periphery of the outlet seal (14; 44) being free of sealing material and open at the periphery or being closed by the sealing structure (16).

Aspect 1 16. Outlet seal according to one of the three immediately preceding aspects, wherein a longitudinal direction of the passage (17a) from the central region of the

Outlet seal (14; 44) points in the direction of the periphery and the passage (17a), measured transversely to the longitudinal direction, has a width which is less than a greatest width of the first fluid passage (18a) and less than a greatest width of the second

Fluid passage (19a).

Aspect 1 17. Exhaust seal according to one of the preceding aspects, wherein the

Sealing structure (16) with the support structure (15) is firmly connected and the support structure (15) extends in plan view in the first fluid passage (18a) and / or in the second fluid passage (18a, 19a) in the area of the respective

Fluid passage (18a, 19a) to form a flow resistance for pressure fluid flowing through the respective fluid passage (18a, 19a).

Aspect 118. Outlet seal according to the preceding aspect, the support structure (15) having a first bulge (15b) and optionally a second bulge (15b) located laterally next to the first bulge (15b) in plan view, and the first bulge (15b) with an axially offset to the first sealing web (18)

Surface area in the plan view extends into the first fluid passage (18a), and the second bulge (15b), if present, extends with a surface area axially offset from the second sealing web (19) in the plan view in the second

Fluid passage (19a) extends.

Aspect 119. Outlet seal according to one of the preceding aspects, further comprising a third sealing web (16a) which, in plan view, shows a between the first

Fluid passage (18a) and the second fluid passage (19a) located, preferably central area of the outlet seal (14) framed tightly all around.

Aspect 120. Outlet seal according to the preceding aspect in combination with aspect 1-13, wherein the third sealing web (16a) is a section of the first sealing web (18) and comprises a section of the second sealing web (19) and surrounds the passage (17a) remaining between the first sealing web (17) and the second sealing web (18) tightly all around in the plan view.

Aspect 121. Outlet seal according to one of the preceding aspects, the

Support structure (15) in plan view the cross-sectional area of the respective

Fills the fluid passage (18a, 19a) completely or at least for the most part and has one or more narrow, preferably hole-like passages (15e) compared to the cross-sectional area of the respective fluid passage (15e) in order to reduce the flow resistance as a pinhole or in the manner to form a pinhole.

Aspect 122. Outlet seal according to one of the preceding aspects, wherein the

Sealing material is injection-molded onto the carrier structure (15) in the form of the sealing structure (16) or the carrier structure (15) in one

Injection molding process with the sealing material in the form of the sealing structure (16) is encapsulated.

Aspect 123. Outlet seal according to one of the preceding aspects, wherein the

Sealing material is a rubber or elastomer material, preferably a

thermoplastic elastomer (TPE).

Aspect 124. Outlet seal according to one of the preceding aspects, the

Carrier structure (15) consists of a carrier material that has a higher strength and / or a higher hardness and / or a higher modulus of elasticity than the sealing material.

Aspect 125. Outlet seal according to one of the preceding aspects, wherein

• the outlet seal (14; 44), preferably the support structure (15), a first flange (15a) and a first one projecting axially from the first flange (15a)

Bulge (15b),

• The first flange (15a) around the first bulge (15b) and the first

Fluid passage (18a) extends and

• The first sealing web (18) extends along the end face axially facing away from the first bulge (15b), preferably also along the other end face, of the first flange (15a) and is firmly connected to the first flange (15a).

Aspect 126. Outlet seal according to one of the preceding aspects, wherein

The outlet seal (14; 44), preferably the support structure (15), has a first flange (15a) and a first bulge (15b) protruding from the first flange (15a), • The first flange (15a) extends around the first bulge (15b) and the first fluid passage (18a) and

• the outlet seal (14; 44) along an outer circumference of the first

Bulge (15b) and extended with the outer circumference of the first

Bulge (15b) comprises a firmly connected first peripheral region (18 ″; 48) made of the sealing material in order to form a plug connection and / or a first radial sealing web (48) with a pump housing (1) when the outlet seal (44) is arranged.

Aspect 127. Outlet seal according to one of the preceding aspects, wherein

The outlet seal (14; 44), preferably the support structure (15), has a second flange (15a) and a second bulge (15b) protruding from the second flange (15a),

• The second flange (15a) extends around the second bulge (15b) and the second fluid passage (19a) and

• The second sealing web (19) extends along the end face axially facing away from the second bulge (15b), preferably also along the other end face, of the second flange (15a) and is firmly connected to the second flange (15a).

Aspect 128. Outlet seal according to one of the preceding aspects, wherein

• the outlet seal (14; 44) along an outer circumference of the second

Bulge (15b) and extended with the outer circumference of the second

Bulge (15b) firmly connected second peripheral region (19 ″; 49) of the sealing material to form a plug connection and / or a second radial sealing web (49) when the outlet seal (44) is arranged on a pump housing (1).

Aspect 129. Outlet seal according to one of the aspects 104 to 124, the

Support structure (15 ') is lid-shaped or disk-shaped.

Aspect 130. Outlet seal according to one of the preceding aspects, wherein the

Sealing structure (16 ') on an outer circumference a radial sealing web (16 ") for the Has a radial seal on an outer periphery of a pump housing (1) of the pump.

Aspect 131. Outlet seal according to one of the preceding aspects in combination with a pressure device (45; 46; 47) acting as a spring, which is shaped to follow the course of the first sealing web (18) and / or the course of the second sealing web (19) at least in sections to the outlet seal (44) on a

Support the pump housing (1) of the pump in a spring-elastic manner.

Aspect 132. Outlet seal according to the previous aspect, wherein the

Pressure device (45; 46; 47) is shaped as a pressure ring (45) or comprises a pressure ring (46a; 47a) and the pressure ring (45; 46a; 47a) can be placed axially on the outlet seal (44) and in the applied state in a top view The course of the first sealing web (18) and, if present, also the second sealing web (19) follows at least in sections and covers the respective sealing web (18, 19).

Aspect 133. Outlet seal according to one of the two immediately preceding aspects, the pressing device (45; 46; 47) being able to be applied axially to the first sealing web (18) and, if present, also the second sealing web (19) and, in the applied state, being orthogonal spring axis pointing to the respective sealing web (18, 19).

Aspect 134. Outlet seal according to one of the three immediately preceding aspects, the pressing device (45; 46) being in axial alignment with the first sealing web (18) and, if present, also with the second sealing web (19) on one of the respective sealing web (18, 19 ) axially facing back one or more support points for an axial

Has support of the pressing device.

Aspect 135. Outlet seal according to one of the preceding aspects, the

Exhaust seal (14; 44) in plan view one or more passages (15c) each with one or more protruding into the respective passage (15c)

Has engagement elements (15d) to engage in a securing element (27) when one protrudes through the respective passage (15c).

Aspect 136. Outlet seal according to one of the preceding aspects, the

Carrier structure (15) is a three-dimensionally curved, thin shell structure made of a metal material or plastic material.

Aspect 137. Outlet seal according to one of the preceding aspects, the

Carrier structure (15) is a sheet metal or plastic structure and

in particular can be a metal sheet or organic sheet.

Aspect 138. Exhaust gasket according to one of the aspects 104 to 137, which as the

Outlet seal (14; 44) of the pump according to one of the aspects 1 to 103 is used. The invention is explained below using exemplary embodiments. Features which become apparent in the respective exemplary embodiment advantageously, individually and in each combination of features, further develop the subjects of the claims, the subjects of the aspects and also the embodiments explained above. One or more features that are or are disclosed in one of the exemplary embodiments may or may each be combined with one or more in another of the

Embodiments disclosed feature (s) can be combined as long as features of different embodiments are not mutually exclusive. Show it:

Figure 1 shows a pump of a first embodiment in an axial view of a

Pump delivery chamber,

Figure 2 components of the pump in perspective view lined up along one

Axis of rotation of the pump,

FIG. 3 shows the longitudinal section A-A of FIG. 1,

FIG. 4 shows the longitudinal section C-C of FIG. 1,

FIG. 5 shows a holding engagement to form a preassembled pump unit,

6 shows the preassembled pump unit in a view of an outlet seal, FIG. 7 shows a perspective view of an outer end face of the outlet seal,

FIG. 8 shows a perspective view of an inner end face of the outlet seal,

FIG. 9 shows the outlet seal in a longitudinal section,

Figure 10 shows a modified holding engagement to form a pre-assembled

Pump unit,

FIG. 11 shows a modified outlet seal in a top view,

FIG. 12 shows a pump of a second exemplary embodiment in a longitudinal section,

FIG. 13 shows a pump of a third exemplary embodiment in a longitudinal section,

FIG. 14 the pressing device of the pump of the third exemplary embodiment,

Figure 15 shows a modified pressure device for the pump of the third

Embodiment, and

16 shows a modified further pressing device.

FIG. 1 shows a pump of a first exemplary embodiment in an axial view of a pump housing 1. A delivery chamber 5 is formed in the pump housing 1. The

Pump housing 1 comprises a peripheral wall 2, which surrounds the delivery chamber 5, and End walls which axially limit the delivery chamber 5 on both end faces. One of the end walls is removed in FIG. 1, so that the view into the delivery chamber 5 is clear.

The pump is designed as a rotary pump and comprises a rotor 10 which can be rotated about an axis of rotation R in the delivery chamber 5 and a plurality of vanes 11 which are guided in the slots of the rotor 10 so as to be radially movable or at least essentially movable in the radial direction, as is customary in vane pumps is. The peripheral wall 2 forms a

Guide surface for the blades 1 1. When the rotor 10 rotates, the blades 11 are pressed against the guide surface of the peripheral wall 2. When the rotor 10 rotates, the guide surface determines how far the blades 11 protrude beyond the outer circumference of the rotor 10. The wings 1 1 limit the conveying cells formed in the conveying chamber 5 in the circumferential direction. The course of the guide surface of the circumferential wall 2 is selected such that the delivery cells periodically enlarge on a low-pressure side of the delivery chamber 5 when the rotor 10 rotates and decrease again on a high-pressure side of the delivery chamber 5 in order to contain a fluid that flows through an inlet on the low-pressure side of the Delivery chamber 5 in the

Delivery chamber 5 flows, with increased pressure to expel it as pressure fluid on the high pressure side of delivery chamber 5 through a pressure outlet located there. In advantageous embodiments, the pump is set up to draw the fluid through the inlet, for example against gravity.

As a further component, the pump comprises a mounting structure 20 which is connected to the

Pump housing 1 is loosely joined in a preassembled state to form the pump as a preassembled assembly unit. The mounting structure 20 serves to fix the pump to a receiving device, i. H. at the installation site. For the fixation, the mounting structure 20 has a flange 21 which projects radially beyond the pump housing 1 and is provided with fastening elements 29 which are used for fastening to the

Serve reception facility. As in the exemplary embodiment, the fastening elements 29 can be passages, such as simple bores, for fastening means, for example fastening screws.

The pump is multi-flow, in the exemplary embodiment double-flow, that is, it has a first work flow and a second work flow. Accordingly, the delivery chamber 5 has a first inlet 6 and a first pressure outlet at 8a for the first working flood and a second inlet 7 and a second pressure outlet at 9a for the second working flood. The rotor 10 rotates counterclockwise in Figure 1, which is indicated by a Direction of rotation arrow is indicated. 8a denotes a first passage which extends axially through the peripheral wall 2 on the high pressure side of the first working flood and 9a denotes a second passage which extends axially through the peripheral wall 2 on the high pressure side of the second working flood. The pressure passages 8a and 9a are each connected to associated pressure outlets of the first end wall 3, as will be explained below with reference to FIG. 2.

Figure 2 shows the separately manufactured components of the pump in a perspective view along the axis of rotation R (Figure 1) one behind the other and relative to each other for the

Assembly of the pump lined up. The peripheral wall 2 forms a closed ring, while the end walls 3 and 4 are plate-shaped. In a first angular range over which the low-pressure side of the first flood of work extends, the peripheral wall 2 has a recess on both end faces in order to form the first inlet 6. Furthermore, the peripheral wall 2 has a different angular range over which the

Low-pressure side of the second flood of work, each has a second recess on both end faces to form the second inlet 7. The fluid can flow into the delivery chamber 5 (FIG. 1) via the end recesses, that is to say via the first inlet 6 and the second inlet 7. The peripheral wall 2 has in the angular range of

Inlet 6 and inlet 7 also have recesses on their outer circumference, which each extend axially from one end-side recess to the axially opposite one another. The recesses on the circumference connect the two end recesses of the first inlet 6 and on the opposite side the two end recesses of the second inlet 7, so that a comparative

large-volume first inlet 6 and a likewise large-volume second inlet 7 can be obtained. The end walls 3 and 4 are each provided with associated recesses 6a and 6b in order to enlarge the flow cross section of the inlet 6. With regard to the second inlet 7, the conditions are the same, only the recess 7a of the first end wall 3 being recognizable in FIG. 2 and the corresponding recess in the second

End wall 4 is covered.

A first pressure outlet 8 extends through the first end wall 3 in an angular range over which the high-pressure side of the first working flood extends and a second pressure outlet 9 extends in an angular range over which the high-pressure side of the second working flood extends the first pressure outlet 8 axially

opposite a first recess and the second pressure outlet 9 axially opposite a second recess. In the assembled state, the first recess is connected to the first pressure outlet 8 via the first passage 8a of the peripheral wall 2 and the second recess is connected to the second pressure outlet 9 via the second passage 9a. The pressure fluid is thus displaced in the pump mode on the front side of the delivery chamber 5, on which the second end wall 5 is arranged, and from there passes through the two passages 8a and 9a of the peripheral wall 2 into the pressure outlet 8 or 9 of the work flow concerned and becomes over the concerned

Pressure outlet 8 or 9 removed. Even without an explicit mention, reference is always made to FIG. 2 below.

The first pressure outlet 8 and the second pressure outlet 9 are on the outer end face of the first end wall 3 axially facing away from the peripheral wall 2 by means of a

Outlet seal 14 sealed against each other and against the low pressure side of the pump. The outlet seal 14 is provided as a seal unit. It comprises a carrier structure 15 made of a carrier material and a sealing structure 16 made of a sealing material which, in advantageous embodiments, is more flexible than the carrier material. The support structure serves as a support for the sealing material, thus gives the sealing material a hold and also serves to correctly position the sealing material relative to the pump housing 1.

The carrier material can be a metal, for example an alloy and in particular steel, or a plastic material, including plastic composite material. The

Sealing material can be resilient so that it contacts a press in one press

Counter surface can perform a sealing function. In particular, the sealing material can be an elastomer material or, for example, rubber. It can be used to fulfill the

Sealing function elastic and / or preferably elastic, d. H. be elastically compressible in itself. In principle, however, would also be a plastically compliant one

Seal material can be used. The sealing material is preferred! a thermoplastic elastomer (TPE).

Figure 3 shows the pump of the first embodiment in the preassembled state in longitudinal section A-A of Figure 1. The pump housing 1 includes those already mentioned

Wall structures, namely the peripheral wall 2, the first end wall 3 and the second

End wall 4, which together delimit the delivery chamber 5 over its circumference and axially on its end faces. The end walls 3 and 4 are each with axial contact on the Circumferential wall 2. The peripheral wall 2 can be joined to the end walls 3 and 4 in particular loosely, ie without a material bond.

The rotor 10 is non-rotatably connected to a drive shaft 12. The drive shaft 12 passes through the end walls 3 and 4 and also the mounting structure 20. In an axial section of the drive shaft 12 protruding from the mounting structure 20, a drive wheel 13 is arranged so as to be non-rotatable relative to the drive shaft 12. In the exemplary embodiment, the drive wheel 13 forms an axial end of the drive shaft 12. The drive wheel 13 is a drive wheel for a belt drive of the drive shaft 12 and thus together of the rotor 10. Alternatively, the drive wheel 13 can also be a chain wheel for a chain drive or a gear wheel for a gear drive of the drive shaft 12. The shaft passage of the assembly structure 20 is sealed by means of a shaft seal 26.

The pump housing 1 is axial relative to the mounting structure 20, i. H. movable back and forth parallel to the axis of rotation R and is linearly guided by the mounting structure 20 within the scope of its relative axial mobility. For the axial mobility, the pump housing 1 and the mounting structure 20 in the region of the second end wall 4 are in an axial

Leadership intervention. The mounting structure 20 and the end wall 4 form a thrust joint, advantageously with a guide sliding engagement and the degree of freedom of the axial one

Translation. The axial mobility serves to compensate for component and / or installation tolerances and / or thermal changes in geometry and / or axial movements which can result from changes in the delivery pressure. So that the rotor 10 can follow axial compensation movements, the rotor 10 can be in one

Anti-rotation engagement with the drive shaft 12 relative to the drive shaft 12 and / or the drive shaft 12 can be axially movable relative to the mounting structure 20. The first end wall 3 and / or the second end wall 2 can be axially movable relative to the drive shaft 12.

The mounting structure 20 has an end wall 21 which extends radially over the

Pump housing 1 protruding area forms the flange already mentioned for fixing the pump at the installation site. An inner collar 22 and outer collar 23 project axially from the end wall 21. The outer collar 23 completely surrounds the pump housing 1 in the region of the second end wall 4 about the axis of rotation R, ie over 360 °. The inner collar 22 surrounds the drive shaft 12. It forms a shaft bushing. Advantageously The inner collar 22 also extends completely, ie over 360 °, around the axis of rotation R.

The inner collar 22 and the outer collar 23 delimit a recess of the assembly structure 20 that is open toward the pump housing 1. The pump housing 1 projects into this annular recess in the region of the second end wall 4 and is used to form the

Shear joint shaped to fit this depression. The pump housing 1 can be guided axially on the inner collar 22 and / or on the outer collar 23.

In order to ensure the sealing of the pressure outlets 8 and 9 against the low-pressure side of the pump and also against one another despite any tolerances and / or changes in geometry of the receiving device on which the pump is arranged and / or of components of the pump, the pump comprises a pressing device 30. The

Pressing device 30 serves to generate an axial pressing force with which the

Outlet seal 14 against an axially facing connection wall thereof

Recording device is pressed.

Figure 4 shows the pump in the assembled state, the pump as such being shown in section C-C of Figure 1. The pump is arranged on a receiving device 35. The arrangement is such that in the assembled state the pump projects with the outlet seal 14 forward into a receiving shaft 36 of the receiving device 35. The mounting structure 20 serves at least for the axial fixation, preferably the complete fixation of the pump on the receiving device 35. In the exemplary embodiment, the mounting structure 20 is screwed to the receiving device 35 in the assembled state by means of a plurality of fastening screws which pass through the fastening elements 29 (FIG. 1). In principle, other types of fixation, for example a snap-in connection, can alternatively also be implemented. The receiving device 35 has a connecting wall 37 which faces axially in the assembled state of the outlet seal 14 and which forms a bottom of the receiving shaft 36. A first pressure connection 38 for the first pressure outlet 8 and a second pressure connection 39 for the second pressure outlet 9 are provided in the connecting wall 37. in the

Pump operation, the pressure fluid of the first working flow is conveyed through the first pressure outlet 8 and the subsequent first pressure connection 38 to an assembly to be supplied with the pressure fluid, while the pressure fluid of the second working flow is conveyed through the second pressure outlet 9 and the subsequent second pressure connection 39 to another Aggregate or the same aggregate and in this case expediently be transported to another location of the same unit. The unit to be supplied can be, for example, a transmission, such as a

Automatic gearbox or steering gear of a vehicle or a gearbox of a plant for generating electrical energy. The fluid is a liquid, such as working oil or lubricating oil, but can in principle also be a gas.

In the first embodiment, the pressing device 30 acts between the

Mounting structure 20 and the pump housing 1. The pressing force that can be generated by the pressing device 30 acts axially on the pump housing 1 and is supported on the mounting structure 20 in the opposite axial direction. The mounting structure 20 and the pump housing 1 limit one axially and in the exemplary embodiment also radially

Recording space 31 in which the pressing device 30 is realized. The receiving space 31 is formed in the recess of the mounting structure 20 into which the pump housing 1 projects and is delimited in one axial direction by the pump housing 1, namely by the second end wall 4. The pressing device 30 comprises a hydraulic device for generating a hydraulic pressing force. For the hydraulic device, the receiving space 31 forms a pressure chamber for a pressure fluid and is also referred to below as the pressure chamber 31. This pressure fluid can in particular be the pressure fluid delivered by the pump. Thus, the pressure chamber 31 can be connected to the high-pressure side of the first working flood and / or the high-pressure side of the second working flood, in order to conduct pressure fluid from the respective working flood into the pressure chamber 31. The fluid connection in question can be implemented as a permanent fluid connection or as a switchable or controllable fluid connection. In simple, and not least therefore preferred, versions, it is a permanent fluid connection, so that the pressure chamber 31 is permanently connected to the high pressure side of the first working flood and / or the high pressure side of the second working flood during operation. In advantageous

Versions is the pressure chamber 31 within the pump housing 1 with the

High pressure side of the delivery chamber 5 (Figures 1 and 3) connected.

The pressing device 30 comprises, in addition to the hydraulic device, a spring device 33 for generating a spring force which also serves as a pressing force for the outlet seal 14. The spring device 33 is arranged in the pressure chamber 31. The

Spring device 33 can, as in the exemplary embodiment, be formed as an annular plate spring. The spring device 33 can be seen in FIG. 2 as an individual component. Other types of spring can also be used to implement the spring device 33. The To generate the spring force, the spring device can also comprise a plurality of springs, which can advantageously be arranged in the pressure chamber 31. The realization of the spring device 33 by means of a single plate spring is advantageous with regard to a simple structure of the spring device 33 and its robustness. Furthermore, the arrangement of the spring device 33 in the pressure chamber 31 is favorable with regard to a compact, ie space-saving, construction of the pump. The spring device 33 acts axially directly on the pump housing 1 and is supported directly on the mounting structure 20 in the opposite axial direction.

In the context of the hydraulic device, the pump housing 1 and the mounting structure 20 form a piston-cylinder unit, within which the pump housing 1 forms the piston and the mounting structure 20 the cylinder. A pressure chamber seal 24, which seals the pressure chamber 31 against the low-pressure side of the pump, is arranged in the gap running between the second end wall 4 and the outer collar 23 of the mounting structure 20. A space seal 25 also extends over the outer circumference of the outer collar 23 and serves, as can be seen in FIG. 4, to seal the receiving shaft 36. In the assembled state, an annular space remains in the receiving shaft 36 around the outer circumference of the pump housing 1, which is filled with the fluid on the low pressure side during pump operation, i.e. the fluid flows through this annular space and the inlets 6 and 7 into the

Delivery chamber 5. In typical applications, the pump draws the fluid from one

Fluid reservoir in the annular space, so that it is also used in such applications

Suction chamber can be called.

As already mentioned, the components of the pump are loosely joined together, as already mentioned. The components, such as in particular the peripheral wall 2, the

End walls 3 and 4, the mounting structure 20 and the outlet seal 14 form an axial layer composite within the pre-assembled pump or mounting unit. This layer composite is held together by means of a safety device of the pump. The securing device comprises at least one holder 27, in the exemplary embodiment it comprises a first holder 27 and, preferably only a further, second holder 27. The respective holder 27 projects in a rod-like manner in the axial direction from the mounting structure 20, through it projects from the mounting structure 20 first seen the second end wall 4, then the peripheral wall 2 and finally also the second end wall 3 and is in a holding engagement with the outlet seal 14. The respective holder 27 can be formed directly on the assembly structure 20 or can be firmly connected to it in a friction or material connection. In principle, the respective holder 27 can protrude loosely through the mounting structure 20 and can be secured axially only by tension. In the exemplary embodiment, the respective holder 27 is pressed into the mounting structure 20.

The assembly unit can be held on the assembly structure 20, for example gripped and handled by means of an automatic assembly machine, wherein the pump housing 1 together with the outlet seal 14 can be held hanging on the assembly structure 20 by the respective holder 27 and outlet seal 14. About the backup or

Holding function, the respective holder 27 can also perform a positioning function due to its arrangement eccentric to the axis of rotation R in order to position the pump housing 1 and thus in particular the pressure outlets 8 and 9 relative to the mounting structure 20 in a specific angular position. In pump operation, the respective holder 27 can also serve as a guide element for axially guiding the housing structures 2, 3 and 4 of the pump housing 1, relative to one another and / or relative to the mounting structure 20.

FIG. 5 shows the holding engagement of one of the holders 27 and the outlet seal 14 in detail. In the holding engagement, the respective holder 27 also projects through the outlet seal 14

Outlet seal 14 is provided with a passage 15c, i.e. one passage 15c per holder 27, the respective passage 15c being shaped to match the associated holder 27. The adjustment is that the respective holder 27 of the

Assembly structure 20 as seen through the passage 15c in question

Exhaust seal 14 performed, but can no longer be withdrawn after performing. The outlet seal 14 acts in the area of the passage after the respective holder 27 has been passed through, like a barb which prevents the holder 27 from being pulled back.

The outlet seal 14 has engagement elements 15d for the holding engagement, which are seen from the outer edge of the respective passage 15c in an axial plan view in FIGS

Project passage 15c. As can be seen in FIG. 5, the engagement elements 15d can be inclined in the axial insertion direction of the associated holder 27. They are elastically bendable. The respective holder 27 is elongated in the form of a rod, preferably cylindrical, and has an engagement section 28 in the region of its free end and an engagement mating element 29 axially adjoining it in the form of a radial widening. The

The mating engagement element 29 forms the free end of the holder 27. The engagement elements 15d act as spring tongue-like barbs for the mating engagement element 29. During the pre-assembly, the second end wall 4, the peripheral wall 2 and the first end wall 3 are pushed along the holder 27 in the direction of the assembly structure 20. Furthermore, the outlet seal 14 is pressed axially against the holder 27 which is widened in the shape of the mating engagement elements 29 at the free end. The mating engagement elements 29 are axially inserted into the associated passage 15c and pressed against the mating engagement elements 15d projecting inwards. The engaging elements 15d yield under the pressure of the engaging counter elements 29 and spring into the holding engagement shown in FIG. 5 when they have been passed by the engaging counter element 29. The engaging elements 15d come axially behind the respective one in the holding engagement

Mating engagement element 29, d. H. to lie axially in the region of the engagement section 28 of the respective holder 27 and prevent the outlet seal 14 from being able to be pulled axially away from the first end wall 3 again. The holding engagement can be coordinated in such a way that the outlet seal 14 in the area of the sealing flanges or sealing webs 18 and 19 is pressed against the counter face surface of the first end wall 3 with a certain pressure force. Alternatively, there may be a small amount of axial play.

The carrier structure 15 forms the respective passage 15c and the engaging elements 15d projecting into this passage 15c. The sealing structure 16 can also form an edge region of the respective passage 15c.

In the first exemplary embodiment, the outlet seal 14 acts as an axial seal both with respect to the pump housing 1 and with respect to the connection wall 37. This can be clearly seen in FIG. 4. In the assembled state of the pump, the outlet seal 14 performs a sealing function 18 along a first sealing web 18 and a second

Sealing web 19 pressed between an outer end face of the first end wall 3 and an axially facing end face of the connecting wall 37.

The first end wall 3 has a first depression 3a and a further, second depression 3b on its outer end face. The wells 3a and 3b cover the

predominant part of the outer end face of the end wall 3. They are advantageously symmetrical in plan view with respect to a straight line intersecting the axis of rotation R. In the exemplary embodiment, they are semicircular, but can be modified

for example, each extend in an arc or kidney shape around the axis of rotation R. The first pressure outlet 8 (FIG. 2) opens into the recess 3a. The second pressure outlet 9 (FIG. 2) opens into the recess 3b. The outlet seal 14 has a sealing flange, a first bulge 15b projecting from the sealing flange (FIG. 3) and a second bulge 15b projecting from the sealing flange. The sealing flange forms the first sealing web 18 and the second sealing web 19

Carrier structure 15, the bulges 15b and one around each of them

Carrier flange 15a. The flange 15a of the support structure 15 is covered on both ends with the sealing material in order to form the sealing webs 18 and 19 and thus the sealing structure 16. The bulges 15b can be free of sealing material.

In modifications, the carrier flange 15a can be omitted in sections or entirely, and the sealing material the sealing flange in the form of the sealing webs 18 and 19

Form in sections or everywhere alone and be flange-shaped or molded directly onto the side walls of the bulges 15b, for example. Instead or in addition, sealing material can cover the side walls of the bulges of the carrier structure 15 in order to improve the hold of the sealing structure 16 on the carrier structure 15. In the exemplary embodiment, the outlet seal 14 is held in the preassembled state of the pump in engagement with the respective holder 27 on the pump housing 1. Instead, or preferably additionally, it can be shaped in a manner adapted to the recess 3a and / or the recess 3b and, in the preassembled state, inserted into the respective recess 3a and / or 3b, ie. H. be held on the end wall 3 positively and frictionally.

The first bulge 15b protrudes into the first depression 3a and the second bulge 15b protrudes into the second depression 3b. The first sealing web 18 extends along the edge of the first recess 3a and the second sealing web 18 extends along the edge of the second recess 3b. The sealing webs 18 and 19 lie against the axially projecting outer end face of the first end wall 3 with respect to the depressions 3a and 3b and frame the depressions 3a and 3b around the pressure outlet 8 located in the depression 3a and the pressure outlet located in the depression 3b 9 to seal. In the assembled state (Figure 4), the sealing web 18 provides a tight, i.e. fluid connection closed off to the outside between the first pressure outlet 8 (FIG. 2) and the first pressure connection 38.

At the same time, the second sealing web 19 provides a tight, i.e. externally sealed fluid connection between the second pressure outlet 9 (Figure 2) and the second

Pressure port 39. The sealing webs 18 and 19 seal the respective fluid connection from the respective other fluid connection and also against the low-pressure side of the pump, including the shaft passage for the drive shaft 12. FIG. 6 shows the pump as a preassembled assembly unit in a perspective view of the outlet seal 14. As already mentioned, the outlet seal 14 comprises the

Carrier structure 15 and the sealing webs 18 and 19, which are each formed from the sealing material. As can be seen in the two longitudinal sections of FIGS. 3 and 4, the support structure 15 projects like a two-part flat basket into the depressions 3a and 3b which are formed on the outer end face of the first end wall 3. The two sealing webs 18 and 19 divide the outer end face of the first end wall 3 into at least substantially equal halves.

The sealing webs 18 and 19 each have an outer, arc-shaped sealing web section which extends on or near the periphery of the end wall 3, following the periphery of the end wall 3. The arcuate section of the first sealing web 18 and the

arcuate section of the second sealing web 19 run on the periphery of the

Outlet seal 14 into one another and form a common sealing web section 17 which extends inwards from a peripheral section end in the direction of a radially central region of the outlet seal 14. The end wall 3 has a shaft passage for the drive shaft 12 in the central region. At an inner section end that borders on the central area, in the exemplary embodiment near the shaft passage, the common sealing web section 17 branches into a section of the first sealing web 18 that extends around the central area on one side of the central area and one around the central area around the central area extended section of the second sealing web 19. Im

In the exemplary embodiment, the two sections of the sealing webs 18 and 19 extend around the shaft passage. After each partial circulation around the central area of the

Outlet seal 14, here the shaft passage, the sealing webs 18 and 19 continue to extend separately from each other radially outwards, in the direction of the periphery, in order to form the respective sealing web 18 and 19 in a closed circulation. In axial

Seen from above, the first sealing web 18 frames a first fluid passage 18a for the pressure fluid from the first pressure outlet 8 and the second sealing web 19 frames a second fluid passage 19a for the pressure fluid from the second pressure outlet 9. The sealing webs 18 and 19 each leave a large cross-section that can be flowed through for the pressure fluid flowing out of the pressure outlet 8 and the pressure outlet 9. Together, the two fluid passages 18a and 19a cover the major part of the outer end face of the first end wall 3. With their common sealing web section 17, they divide the end face of the pump housing 1 into two at least substantially identical hemispheres, in which the pressurized fluid can be removed. Viewed in plan view, the sealing webs 18 and 19 leave a passage 17a, which extends from the central region of the outlet seal 14 in the direction of the periphery, free for a lubricating fluid. The passage 17a extends from the central region of the outlet seal 14 to at least one connecting channel 5a, which extends through the first end wall 3 and connects the passage 17a to the low-pressure side of the delivery chamber 5 (FIG. 1). The passage 17a runs open at the periphery, ie extends further outwards via the mouth of the connecting channel 5a. Lubricating fluid for lubricating the shaft bearing of the drive shaft 12 can thus enter the delivery chamber 5 and / or on the periphery of the outlet seal 14 via the passage 17a and the connecting channel 5a

Flush out the receiving shaft 36 and thus to the low pressure side of the pump. In particular, the return through the connecting channel 5a extending in the pump housing 1 directly into the delivery chamber 5 is advantageous. The fluid to be delivered by the pump can advantageously also be the lubricating fluid.

The carrier structure 15 not only fulfills the function of a carrier for the sealing material. It also serves to reduce pressure peaks when the pressure fluid is cold and therefore comparatively viscous, for example when starting during a cold start. To perform this function, the axial projection, i.e. H. Provided in plan view, region of support structure 15 extending within first sealing web 18 and region of carrier structure 15 extending in plan view within second sealing web 19 are provided with passages 15e. In the exemplary embodiment, the support structure 15 is provided with small, hole-like passages 17, i.e. it is perforated as seen across the fluid passages 18a and 19a. The carrier structure 15 acts as a flow resistance, i. H. as a throttle or orifice, thereby reducing pressure peaks. In the warm operating state and correspondingly reduced viscosity of the pressure fluid, there is a certain, then only slight increase in

Flow resistance no longer matters.

FIGS. 7 to 9 show an outlet seal 14 as such, before being arranged on the pump housing 1. In this case, FIG. 7 is a perspective view of the outer end face of the outlet seal 14 in the assembled state, and FIG. 8 is a perspective view of the outer end wall in the assembled state 3 facing inner face of the

Outlet seal 14 and FIG. 9 a longitudinal section through the central area and the two passages 15c, which in the preassembled state of the pump serve for holding engagement with one holder 27 each. The outlet seal 14 corresponds with respect to its outer end face, which can be seen in the perspective of FIG. 7, to the outlet seal 14 of FIGS. 2 to 6. The support structure 15 with its two perforated bulges 15b and the passages 15c used for securing corresponds to the support structure 15 the outlet seal 14 of FIGS. 2 to 6. In the longitudinal section of FIG. 9, the flanges 15a surrounding the fluid passages 18a and 19a can also be seen.

In contrast to the outlet seal 14 of FIGS. 2 to 6, the bulges 15b are also covered with the sealing material all around on the sides. These circumferential areas are designated 18 'and 19'. The bulges 15b are by the

Sealing material widened laterally, so that the modified in this way

Outlet seal 14 inserted into the recesses 3a and 3b and with their in the

Circumferential regions 18 'and 19' with bulges 15b covered with sealing material in the depressions 3a and 3b by means of a plug connection, i. H. can be held with friction. The frictional engagement serves to position and hold the outlet seal 14 in addition to the holding engagement.

In Figures 7 to 9 are also the engagement elements 15d for securing in

pre-assembled condition of the pump recognizable. The engagement elements 15d are projections which project into the respective passage 15c from the circumference thereof. In the holding engagement, which is shown in detail in FIG. 5, the engaging elements 15d engage in the engaging section 28 of the respective holder 27 and engage behind the engaging counter-element 29, which is formed as a widening of the respective holder 27, so that the outlet seal 14 does not simply axially emerge from the holding engagement can be pulled. The engagement elements 15d are inclined to facilitate the insertion of the respective holder 27 in the axial insertion direction. They are designed as spring tongues so that they can be bent away from one another against elastic restoring force by the holder 27 pressing against them during axial insertion and after passing through the mating engagement element 29 into the slimmer ones

Spring back engagement section 28, whereby the holding engagement shown in Figure 5 is produced.

Figure 10 shows a section of a modified with respect to the holding intervention

Outlet seal 14 in the area of the holding engagement in longitudinal section. The modified

Outlet seal 14 differs from the outlet seal 14 of FIGS. 2 to 6 and the outlet seal 14 of FIGS. 7 to 9 in that the holding engagement is not between the holder 27 and the support structure 15, but between the holder 27 and the

Sealing structure 16 is produced. The carrier structure 15 has one passage per holder 27, but the respective passage is lined with the sealing material all around, so that the sealing material is in the area of the passage

Forming engagement element 16d, which is elastically compressed when the outlet seal 14 is pushed on by the mating engagement element 29 of the holder 27 and elastically radially extends into the slimmer engagement section 28 when the engagement mating element 29 has passed through the passage of the outlet seal 14. The holder 27 corresponds entirely to the holder 27 of FIGS. 1 to 9. Apart from the differences explained

correspond to the outlet seal 14 and basically also that in FIG. 10

holding engagement of the outlet seal 14 shown in FIGS. 7 to 9.

Figure 11 shows a modified outlet seal 14 in a plan view of its outer end face in the assembled state. The modified outlet seal 14 differs from the outlet seal 14 of FIG. 6 only in that the passage 17a is closed at the periphery by means of a short sealing section and therefore lubricating fluid only into the delivery chamber via the connecting channel 5a (FIG. 6) opening into the passage 17a 5 can be traced. The sealing webs 18 and 19, together with the short sealing web section adjoining the periphery, form a third sealing web 16a which, in the axial plan view, frames the central area of the outlet seal 14 and the passage 17a, which connects the central area with the connecting channel 5a, and im assembled state by axial sealing contact with the connecting wall 37 (Figure 4) tightly encloses and thus separates from the annular space in the receiving shaft 36. Apart from the third sealing web 16a, the modified outlet seal 14 corresponds to that described above. The modified outlet seal 14 can optionally be used instead of the one previously described

Outlet seal 14 can be used.

FIG. 12 shows a pump that is also designed as a rotary pump in a second exemplary embodiment, which is derived from the first exemplary embodiment. So far

To distinguish components of the modified pump from the functionally equivalent components of the first exemplary embodiment, the reference symbols of the first exemplary embodiment are provided with an apostrophe for the relevant components. In the second exemplary embodiment, the end walls 3 'and 4' support the drive shaft 12. The mounting structure 20 'does not form a bearing point for the drive shaft 12. Accordingly, a shaft seal 26 is arranged in the bearing gap between the drive shaft 12 and the second end wall 4'. In the assembly structure 20 ', the inner collar has been omitted, and the second protrudes instead

End wall 4 'with an axially projecting collar, which is also a socket for the

Drive shaft 12 forms in a central passage of the assembly structure 20 '. The pressure chamber 31 formed between the pump housing 1 and the mounting structure 20 'as in the first exemplary embodiment is sealed radially on the inside by means of an inner pressure chamber seal 24' which is arranged between the end wall 4 'and the mounting structure 20'. As in the first exemplary embodiment, the pressure space 31 is formed radially outside by means of the

Pressure chamber seal 24 sealed.

A modified outlet seal 14 'is arranged on the outer end face of the first end wall 3'. In contrast to the first exemplary embodiment, the first end wall 3 ′ provided with the pressure outlets 8 and 9, as in the first exemplary embodiment, has no large-scale depressions 3a and 3b. Correspondingly, the outlet seal 14 'has a modified support structure 15', which is at least essentially shaped as a flat, thin disk and only circumferentially on the outer circumference in the axial direction

has upstanding edge, so that it has the shape of a flat cover, which is excepted in the central area around the shaft passage. The outlet seal 14 'is plugged onto the first end wall 3' in the region of the upstanding edge of the support structure 15 'and is held there by friction. The holders 27 'hook with the first end wall 3' in order to hold the components of the assembly unit together in the preassembled state and to position them relative to the assembly structure 20 'in a certain angular position.

The outlet seal 14 'has a sealing structure 16' with sealing webs 18 'and 19', which in the top view has the same course as the sealing webs 18 and 19 of the first

Have embodiment. In addition, the sealing structure 16 ', with the sealing webs 18' and 19 'connected radially on the outside, has an outer radial sealing web 16''which covers the upstanding edge of the support structure 15' on the outside. As in the first exemplary embodiment, the outlet seal 14 ′ interacts both with the pump housing 1 and with the connecting wall 37 of the receiving device 35 (FIG. 4) as an axial seal. In addition, it can act as a radial seal with its outer radial sealing web 16 “when assembled. Figure 13 shows a pump of a third embodiment in a longitudinal section. The third exemplary embodiment is also a rotary pump. This differs from the pumps of the first and second exemplary embodiments in that it has an outlet seal 44, which is supported on the pump housing 1 by means of a pressing device 45 so that it can move axially relative to the pump housing 1.

A mounting structure in addition to the pump housing 1 is not present in the third exemplary embodiment. The second end wall 4 of the previous exemplary embodiments is instead replaced by a second end wall 40, which also serves as an assembly structure. The pump is fastened to the receiving device 35 (FIG. 4) by means of the second end wall 40. The second end wall 40 has a radially projecting flange 41 for mounting, in the area of which fastening elements 29 are provided which, as in the previous exemplary embodiments, serve as passages for, for example

Fixing screws can be formed. In the assembled state in the

Receiving shaft 36 projecting axial section surrounds a space seal 42, the second end wall 40 to seal the receiving shaft 36 and the suction chamber formed therein to the outside environment. The layered structure of the pump housing 1 with the peripheral wall 2, the first end wall 3 and the second end wall 40 otherwise corresponds to the housing structure of the previous exemplary embodiments. The rotor 10 with the vanes 11 and the drive shaft 12 also correspond to the functionally identical components of the previous exemplary embodiments.

As in the previous exemplary embodiments, the pump of the third exemplary embodiment has two circuits and therefore has a first pressure outlet 8 and a second pressure outlet 9 corresponding to the first exemplary embodiment. The first end wall 3 corresponds at least substantially to the first end wall 3 of the first exemplary embodiment and, like this, has, on its outer end face, a depression 3a in plan view, into which the first pressure outlet 8 opens, and a second depression 3b, in which the second

Pressure outlet 9 opens. What has been said about the recesses 3a and 3b of the first exemplary embodiment applies to the recesses 3a and 3b.

The axially movable outlet seal 44 has a support structure 15 corresponding to the first exemplary embodiment and a sealing structure 16 made of the sealing material, which has a first sealing web 18 for the first working flood and the first pressure outlet 8 and a second sealing web 19 for the second working flood and the second pressure outlet 9 forms. The sealing webs 18 and 19 correspond to the course according to the sealing webs 18 and 19 of the first exemplary embodiment and act with the connecting wall 37 in FIG

Receiving device 35 as an axial seal.

The outlet seal 44 differs from the outlet seal 14 in that it is connected to the peripheral walls of the recesses 3a and 3b, i.e. H. with the inner peripheral surfaces of the depressions 3a and 3b, each form a radial seal. Accordingly, the sealing material not only forms the sealing webs 18 and 19, but also covers the support structure 15 in the region of the bulges 15b which protrude into the depressions 3a and 3b in order to form the respective radial seal with the peripheral wall of the respective depression 3a and 3b.

The radial sealing webs which act as a radial seal are designated 48 for the first flood of work or first depression 3a and 49 for the second flood of work or second depression 3b.

The radial sealing webs 48 and 49 are shaped to match the course of the inner circumferential surfaces of the depressions 3a and 3b, so that they seal the depressions 3a and 3b all round on the inner circumferential surfaces and in this way separate the pressure outlets 8 and 9 from one another and from the low-pressure side of the pump. The outlet seal 44 can largely on its inner end face axially facing the pump housing 1

Outlet seal 14 of Figures 7 to 9 correspond. The radial sealing webs 48 and 49 thus correspond to the peripheral regions 18 'and 19' covered with the sealing material, the radial sealing webs 48 and 49, however, unlike the peripheral regions 18 'and 19', not being interrupted by passages 15c. To form functionally identical passages 15c, these can be arranged closer to the central area in the outlet seal 44 than in the case of the outlet seal 14 in FIGS. 7 to 9, or the depressions 3a and 3b and correspondingly also the radial sealing webs 48 and 49 locally in the area of the passages 15c further outwards be bulged in order to receive the radial sealing webs 48 and 49 completely circumferentially without interruption. The bulges 15b and the sealing webs 48 and 49 expediently have a greater height in the axial direction, measured from the

Axial sealing webs 18 and 19, as the bulges 15b and peripheral regions 18 'and 19' of the outlet seal 14 of Figures 7 to 9, on the one hand, the arrangement of the

To compensate pressure device 45 and on the other hand to ensure the radial seal despite the axial mobility relative to the first end wall 3. Apart from the differences explained, the outlet seal 44 corresponds to the outlet seal 14 of the first exemplary embodiment and in particular to the modified outlet seal 14 of FIGS. 7 to 9. The pressing device 45 is a spring device. The pressure force is generated purely mechanically.

In Figure 14, the pressing device 45 is shown individually, in the non-installed state. It is designed as an annular wave spring.

The pressing device 45 acts in the region of the peripheral web sections of the sealing webs 18 and 19 on the outlet seal 44 in order to press it axially against the facing connecting wall 37 in all operating states of the pump and thereby to seal the two working flows from one another and against the low-pressure side of the pump

guarantee. In the installed state, the pressing device 45 lies with a

Spring end face on the sealing flange on the outer circumference of the outlet seal 44 and is supported with the other spring end face on an axially opposite outer end face region of the first end wall 3. The pressing device 45 overlaps with the peripheral sections of the sealing webs 18 and 19, so that the pressure force generated as a spring force acts on the sealing webs 18 and 19 in the web sections in question without radial offset.

FIG. 15 shows a pressing device 46, which is used as an alternative to the pressing device 45 and can also be arranged in a comparable manner to the pressing device 45. In the third exemplary embodiment, the pressing device 46 can simply replace the pressing device 45. The pressing device 46 has an advantageously planar pressing ring 46a, which is used to abut the outlet seal 44, and a plurality of spring elements 46b, which are arranged at equal angular intervals around the circumference of the pressing ring 46a and which, when installed, rest against the first end wall 3 around the pressing ring 46a and thus the outlet seal 44 is supported axially on the first end wall 3. The spring elements 46b are shaped and arranged on the pressure ring 46a in such a way that the spring forces generated by the spring elements 46b during axial compression act axially and without offset on the pressure ring 46a and thus on the peripheral sections of the sealing webs 18 and 19.

FIG. 16 shows a further modified pressing device 47. The pressing device 47 also forms, in an integrated design, a support structure for an outlet seal, which, as a structural unit, also forms the sealing webs required to seal the working floods Has sealing material. The sealing structure with the sealing webs is not shown in FIG. 16. The carrier structure 47a has the shape of the sealing webs 18 and 19 of the outlet seal 14 shown in FIG. 11 in an axial plan view. Accordingly, it encircles a peripheral ring and structural sections for supporting the sealing web section 17 common in FIG. 11 and the two the passage 17a laterally

delimiting further sealing web sections. A plurality of spring elements 47b protrude evenly distributed from the ring over the circumference. The sealing webs required for the fulfillment of the sealing function are joined with the carrier structure 47a following their course or molded onto the carrier structure 47a following their course, for example in a plastic injection molding process, in which case preferably a sealing material is used

thermoplastic elastomer is used.

Reference number:

1 housing

2 peripheral wall

3 end wall

4 end wall

5 delivery chamber

5a relief channel

6 admission

6a recess

6b recess

7 entry

7a recess

8 pressure outlet

8a connecting channel

9 pressure outlet

9b connecting channel

10 rotor

1 1 wing

12 drive shaft

13 drive wheel

14 Outlet seal '' Outlet seal, support structure

‘Support structure

a flange

b bulge

c continuity

d engagement element

e passage

Sealing structure

a sealing bar

d engagement element

‘Sealing structure

“Radial sealing web

Sealing web section passage

Sealing web

‘Peripheral area

a fluid passage

Sealing web

Circumferential area

a fluid passage

Assembly structure

Front wall

inner waistband

outer waistband

Pressure chamber seal

Installation space seal

Shaft seal

holder

’Holder

Engaging section

Engagement counter element pressing device

Pressure chamber, receiving space - 3 spring device, spring 4

5 Support device 6 Support shaft 7 Connection wall, floor 8 Pressure connection 9 Pressure connection 0 front wall

1 assembly structure 2 installation space seal 3

4 outlet seal 5 pressure device 6 pressure device 6a pressure ring

6b spring element

7 pressing device

47a pressure ring

47b spring element

48 radial sealing web

49 radial sealing web

R axis of rotation

Claims

Expectations

1. Pump for supplying an assembly, for example a transmission, with a

Pressurized fluid, the pump comprising:

1.1 a pump housing (1) with a peripheral wall (2) which surrounds a delivery chamber (5) of the pump, a first end wall (3) and a second end wall (4; 40) which delimit the delivery chamber (5) on their end faces,

1.2 a rotor (10) which is rotatable in the delivery chamber (5) about an axis of rotation (R) to form delivery cells which increase and decrease periodically as the rotor (10) rotates, to pressurized fluid from a low-pressure side of the pump to a high-pressure side of the pump to promote,

1.3 a pressure outlet (8) which opens at an outer end face of the first end wall (3) facing away from the delivery chamber (5) and through the pressure fluid from the

Conveyor chamber (5) can be removed,

1.5 optionally a mounting structure (20; 40, 41) serving to attach the pump to a receiving device (35), which can be provided in addition to the pump housing (1) or can be formed by the second end wall (40), and

1.6 one with the outlet seal (14; 44) in a holding engagement, the holder (27), the peripheral wall (3) and the end walls (2, 4) and the mounting structure (20; 40, 41), if this in addition to the second end wall (4) is provided, positioned relative to each other and held together axially by means of the holding engagement as a preassembled assembly unit.

2. Pump according to the preceding claim, wherein the assembly unit

Compression device (30; 45) for applying an axial pressure force to the outlet seal (14; 44), wherein

- The pump housing (1) is axially movable relative to the mounting structure (20) and is axially supported on the mounting structure (20) via the pressing device (45)

and or

- The outlet seal (44) is axially movable relative to the pump housing (1) and is axially supported on the pump housing (1) via the pressing device (45).

3. Pump according to one of the preceding claims, wherein the mounting unit comprises a spring device (33; 45) which in the axial direction between the pump housing (1) and the mounting structure (20) or between the pump housing (1) and

Outlet seal (44) acts to apply an axial spring force to the outlet seal (14; 44) and thereby against an axially opposite connecting wall (37) of the outer end face of the first end wall (3) in the assembled state

Press the receiving device (35).

4. Pump according to one of the preceding claims, wherein the holder (27) the

Extends outlet seal (14; 44) in holding engagement with respect to the axial direction and thereby axially holds the assembly unit together, the holder (27) in preferred embodiments protruding at least into an axial passage (15c) of the outlet seal (14; 44) and the outlet seal (14; 44) engages axially immediately behind the passage (15c) or in the passage (15c) in holding engagement with respect to the axial direction.

5. Pump according to one of the preceding claims, wherein an engaging element (15d; 16d) of the outlet seal (14; 44) and an opposing mating element (29) of the holder (27) are in the holding engagement, the engaging element (15d; 16d) in the holding engagement the

Counter engaging element (29) holds in relation to the axial direction, preferably engages behind.

6. Pump according to the preceding claim, wherein the engagement element (15d; 16d)

and / or the mating element (29) in the radial direction against elastic

Restoring force is or are resilient, so that the respective elastic restoring force causes a radial yielding during the production of the holding engagement and then an automatic radial snap-in or widening of the engaging element (15d; 16d) and / or the engaging counter-element (29) into the holding engagement.

7. Pump according to one of the preceding claims, wherein the holder (27) in axial

Direction from the mounting structure (20), if this is additionally provided, or the second end wall (40) protrudes into the holding engagement and is preferably immovably connected to the mounting structure (20), if this is additionally provided, or the second end wall (40) is.

8. Pump according to one of the preceding claims, wherein the holder (27)

Peripheral wall (3) and the end walls (2, 4) and the mounting structure (20; 40, 41), if this is provided in addition to the second end wall (4), positioned relative to one another in the holding engagement in a loose connection as the pre-assembled assembly unit holds together axially.

9. Pump according to one of the preceding claims, wherein the holder (27) in axial

Elongated, preferably pin or rod-shaped, has a free axial end and is axially close to the holding engagement at the free end or the free end.

10. Pump according to one of the preceding claims, wherein the outlet seal (14; 44) in addition to the holding engagement on the first end wall (3) is frictionally held, preferably by means of an axial plug connection of the outlet seal (14; 44) and the first end wall (3).

11. Pump according to one of the preceding claims, wherein the holding engagement consists of a positive connection and / or a frictional connection.

12. Pump according to one of the preceding claims, wherein the holder (27) axially through the peripheral wall (2) of the pump housing (1), optionally also through the first end wall (3) and / or the second end wall (4) of the pump housing ( 1), wherein the peripheral wall (2), the first end wall (3) and the second end wall (4) of the

Pump housing (1) are preferably made separately from one another and lie directly against one another in a loose axial contact.

13. Pump according to one of the preceding claims, wherein the pump as a gear pump for supplying a gear with the pressure fluid as the working fluid and / or as

Lubricant is used, preferably in a vehicle.

14. Pump according to one of the preceding claims, wherein the outlet seal (14; 44) a support structure (15) made of a support material, preferably a three-dimensionally curved, thin support structure (15), and a sealing structure (16) connected to the support structure (15) comprises a sealing material, for example a rubber or elastomer material, for sealing the pressure outlet (8) and the support structure (15) and / or the sealing structure (16) with the holder (27) is in the holding engagement, in preferred embodiments the T backing material has a higher strength and / or a higher hardness and / or a higher modulus of elasticity than the sealing material.

15. Pump according to one of the preceding claims, wherein the outlet seal (14; 44) for sealing a first pressure outlet (8) and an optional second

Pressure outlet (9) of the pump has a sealing structure (16) made of a sealing material, the sealing structure (16) comprising:

• Optionally, a second sealing web (19) which, in plan view, optionally has a second fluid passage (19a) located to the side of the first fluid passage (18a)

Outlet seal (14; 44) framed tightly all around, and

• a support structure (15) which is fixedly connected to the sealing structure (16) and which extends in plan view into the first fluid passage (18a) in order to provide a flow resistance in the region of the first fluid passage (18a) for through the first fluid passage (18a) to form flowing pressure fluid

• wherein the holder (27) with the support structure (15) and / or the sealing structure (16) is in the holding engagement.