EP4166752B1 - Pompe avec dispositif de retenue axiale - Google Patents

Pompe avec dispositif de retenue axiale

Info

Publication number
EP4166752B1
EP4166752B1 EP22200759.3A EP22200759A EP4166752B1 EP 4166752 B1 EP4166752 B1 EP 4166752B1 EP 22200759 A EP22200759 A EP 22200759A EP 4166752 B1 EP4166752 B1 EP 4166752B1
Authority
EP
European Patent Office
Prior art keywords
retaining element
holding element
pump
end wall
spring structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP22200759.3A
Other languages
German (de)
English (en)
Other versions
EP4166752A1 (fr
EP4166752C0 (fr
Inventor
Claus Welte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schwaebische Huettenwerke Automotive GmbH
Original Assignee
Schwaebische Huettenwerke Automotive GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schwaebische Huettenwerke Automotive GmbH filed Critical Schwaebische Huettenwerke Automotive GmbH
Publication of EP4166752A1 publication Critical patent/EP4166752A1/fr
Application granted granted Critical
Publication of EP4166752B1 publication Critical patent/EP4166752B1/fr
Publication of EP4166752C0 publication Critical patent/EP4166752C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/406—Casings; Connections of working fluid especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/805—Fastening means, e.g. bolts

Definitions

  • the invention relates to a pump, in particular a rotary pump, with a spring structure and in particular to the arrangement of the spring structure on the pump. Furthermore, the invention relates to the axial securing of the pump, in particular of the pump housing, for example, for transport of the pump and/or during its operation. In particular, the invention relates to the manner in which the spring structure and/or an end wall of the pump housing is held to the pump housing and in particular to a preassembled pump or assembly unit.
  • the pump can be used as a gear pump to supply a transmission, for example an automatic transmission or steering gear of a vehicle or a transmission of a wind turbine, with pressurized fluid.
  • it can be used as a lubricating oil pump and/or coolant pump to supply an internal combustion engine and/or an electric motor, for example a drive motor of a vehicle, with lubricating oil and/or coolant.
  • a combined use as a lubricating oil pump and/or coolant pump and additionally as a gear pump is also conceivable, particularly in designs in which the pump has multiple flow passages.
  • a design as a vacuum pump is also conceivable.
  • the pump can be single-flow or multi-flow, in particular multi-circuit.
  • the pump can advantageously be designed as a cartridge.
  • Pumps in cartridge design are known from the prior art, which can be inserted as an assembly unit into a receiving device, in particular into a receiving shaft, for example of a gearbox, such as. EP 3 081 744 A1 and DE 10 2013 209877 A1
  • the axial securing of pumps is usually achieved through press fits or additional, externally accessible elements such as retaining rings.
  • Such axial securing devices generate dirt particles in the form of abrasion during assembly or disassembly of the pump, which can lead to damage during operation or, in the worst case, to pump failure due to wear.
  • non-destructive disassembly without damaging the surface and/or increasing the pump's tolerances is impossible due to the pressing process.
  • spring structures for exerting an axial force on the pump housing are sometimes loosely inserted into the mounting shaft during assembly or installed within the pump housing, for example, between a housing cover and a peripheral wall.
  • the spring structure is held in position primarily by axial contact pressure.
  • This loose assembly of the spring structure can result in the spring structure not being optimally aligned with the end wall of the pump housing from an axial perspective, for example, exhibiting a radial offset from the pump housing and/or being inserted upside down when inserted into the receiving device, i.e., in the case of a circular spring structure, being rotated by 180° with the diameter as the rotation axis.
  • This can result in the compressive force exerted by the spring structure on the pump housing not being evenly distributed into the pump housing, which can lead to malfunctions and leaks, particularly if the spring structure simultaneously performs a sealing function between a pump outlet and a pressure connection of the receiving device.
  • a pump as pertaining to the invention comprises a pump housing with a delivery chamber radially surrounded by a peripheral wall.
  • the pump housing comprises an inlet for the fluid on a low-pressure side and at least one outlet for the fluid on a high-pressure side, as well as a delivery element movable within the delivery chamber for delivering the fluid from the low-pressure side to the high-pressure side.
  • the delivery element is preferably formed by a rotatable delivery rotor, for example, by a rotor of a vane pump with at least one vane.
  • the low-pressure side of the pump extends from a reservoir from which the pump draws the fluid, via the inlet to at least one pumping chamber inlet. If the transition from low pressure to High pressure takes place in the delivery chamber, the low pressure side of the pump also includes the low pressure side of the delivery chamber, i.e. extends on the low pressure side into the delivery chamber.
  • the high-pressure side of the pump comprises the high-pressure region extending within the pump housing, in particular including the high-pressure region of the delivery chamber, and further extends to at least the unit to be supplied with the fluid or, if the pump supplies multiple units with the fluid, to each of these units.
  • the high-pressure side comprises the high-pressure region extending within the pump housing and the high-pressure region extending within the receiving device up to a pressure connection of the receiving device, through which the pressurized fluid flowing through the pump outlet can be discharged.
  • the delivery chamber is bounded in the axial direction by an end wall. At least one outlet for the fluid delivered from the delivery chamber opens out on an outer end side of the end wall facing away from the delivery chamber.
  • the pump can comprise a seal provided for sealing the outlet on the outer end face of the end wall.
  • the seal can have a sealing loop surrounding the outlet on the outer end face of the end wall.
  • the seal if present, is preferably designed as an axial seal. If the pump is designed with multiple flow, in particular with multiple circuits, the axial seal can serve in particular to fluidically separate the individual outlets.
  • the pump housing comprises the peripheral wall and the end wall as a first end wall. Furthermore, the pump housing comprises a further, second end wall arranged on the axial end side of the peripheral wall facing away from the first end wall.
  • the first end wall or the second end wall can be formed integrally with the peripheral wall to form a housing pot.
  • the first end wall or the second end wall can be joined to the peripheral wall or formed, for example, cast, and together form a housing pot.
  • the peripheral wall, the first end wall and the second end wall are separately manufactured components, which are preferably pressed axially against each other in loose pressure contact.
  • the Peripheral wall, the first end wall and the second end wall are held together axially by a securing device.
  • the pump comprises a spring structure for applying a pressure force to the pump housing.
  • the pressure force serves, in particular, to press the peripheral wall, the first end wall, and/or the second end wall tightly against one another.
  • the spring structure is arranged on the outer end face of the end wall. In the axial direction, the spring structure is preferably arranged on the first end wall of the pump housing, in particular on the outer end face of the first end wall facing away from the delivery chamber.
  • the spring structure is preferably formed by a mechanical spring and can in particular be formed by a disc spring.
  • the spring structure is preferably formed by a ring capable of bearing loads in the axial direction, in particular by an annular disc capable of bearing loads in the axial direction.
  • the spring structure can be designed in the shape of a conical shell, in particular as a conical shell-shaped annular disc.
  • the spring structure can be wave-shaped in the circumferential direction; in particular, the spring structure can be a wave-ring spring.
  • the spring structure can be slotted, i.e., the spring structure can have slots extending in the radial direction, wherein the slots extend from radially inside to radially outside and/or from radially outside to radially inside.
  • the spring structure can also have other recesses, e.g., circular segment-shaped or angular recesses radially outside or radially inside the spring structure and/or angular or circular holes.
  • the pump housing together with the spring structure, forms a preassembled pump unit, i.e., an assembly unit.
  • the pump comprises a securing device with a female retaining element having an axially extending recess and a male retaining element, which can be brought into axially tensile engagement with the female retaining element in the recess, and with an additional retaining element.
  • the securing device can also axially secure only the pump housing.
  • the peripheral wall can be connected to the first end wall and/or the second end wall via a holding device, in particular via at least one holder.
  • the end wall or walls are positioned and held together by the holding device with respect to the rotational angle relative to the peripheral wall.
  • the holding device can be formed separately from the securing device.
  • the holding device is formed by the securing device, in particular by at least one of the holding elements.
  • the holder of the holding device is preferably formed by one of the holding elements, preferably the female holding element.
  • one of the holding elements, preferably the female holding element preferably protrudes into the first end wall and/or the second end wall with a rod-shaped section or passes through them.
  • one of the holding elements, preferably the female holding element can protrude into the peripheral wall with a rod-shaped section or pass through it.
  • the additional retaining element is a separate and additional retaining element from the male retaining element and the female retaining element.
  • the securing device serves to axially secure the pump housing, in particular to axially secure the spring structure and/or the end wall.
  • the securing device serves to releasably axially secure the pump housing, in particular to axially secure the spring structure and/or the end wall to the pump housing.
  • the securing device secures the end wall to the pump housing.
  • the spring structure and/or the end wall has axial contact with the securing device on an outer end face axially facing away from the conveying chamber, in particular with one of the holding elements, and are/is thereby held on the pump housing.
  • the end wall is held on the pump housing, this means that the end wall is held in particular on the peripheral wall and/or the second end wall of the pump housing.
  • the spring structure and/or the end wall is held on the pump housing by one of the holding elements through the joining engagement.
  • the spring structure preferably has axial contact with the securing device, in particular with one of the holding elements, on a rear side axially facing away from the pump housing and is thereby held on the pump housing.
  • the receiving device can, in particular, be a housing of a unit to be supplied with the pressurized fluid, such as a transmission or a motor.
  • the first end wall or the second end wall preferably the first end wall, lies axially opposite a connecting wall of the receiving device.
  • the connecting wall of the receiving device can, in particular, be a floor of a receiving shaft for the pump.
  • a pressure connection can open into the connecting wall of the receiving device, through which the pressurized fluid flowing through the outlet can be discharged.
  • the safety device When the pump is installed, the safety device has no axial pressure contact, in particular no sealing contact, with the connecting wall of the receiving device.
  • the exclusion of axial pressure contact, in particular sealing contact, with the connecting wall should not mean that the safety device cannot have contact with the connecting wall of the receiving device.
  • the safety device can have axial contact with the connecting wall of the Receiving device, which, however, does not exert any permanent axial compressive forces on the securing device.
  • the securing device can have axial contact with the connecting wall of the connecting device without being pressed against it, as is the case, for example, with axial seals.
  • the securing device has no axial contact with the connecting wall of the receiving device.
  • the safety device and in particular the additional retaining element do not have a sealing function, especially when the pump is installed.
  • the safety device preferably does not serve to fluidically separate the high-pressure side from the low-pressure side.
  • the safety device does not serve to establish a tight fluid connection between the pump outlet and the pressure connection of the receiving device.
  • the securing device When the pump is installed, the securing device is preferably surrounded radially outward by the spring structure, wherein the securing device can at least partially overlap with the spring structure when viewed axially.
  • the securing device preferably extends radially outward to a lesser extent than the spring structure.
  • the additional retaining element is surrounded radially outwardly by the spring structure when the pump is installed, wherein the additional retaining element can at least partially overlap with the spring structure when viewed axially.
  • the additional retaining element preferably extends radially outwardly less far than the spring structure.
  • the spring structure surrounds the female retaining element and/or the male retaining element in the radial direction, wherein the female retaining element and/or the male retaining element can at least partially overlap with the spring structure when viewed axially.
  • the spring structure can be in axial contact, in particular in axial pressure contact, with the connecting wall of the receiving device when the pump is installed.
  • the spring structure is preferably in axial sealing contact with the connecting wall of the receiving device when the pump is installed. Establish a tight fluid connection between the pump outlet and the pressure port of the receiving device.
  • the spring structure can perform a sealing function and fluidly connect the pump outlet to the pressure port of the receiving device while simultaneously fluidly separating it from the low-pressure side.
  • the securing device in particular the part of the securing device visible in an axial view of the end wall, is arranged entirely within the high-pressure side.
  • the securing device is thus preferably exclusively flushed with pressurised fluid from the high-pressure side.
  • the additional holding element is arranged entirely on the high-pressure side.
  • the additional holding element is thus preferably exclusively flushed with pressurised fluid from the high-pressure side.
  • the female holding element and/or the male holding element are/are also arranged within the high-pressure side of the pump.
  • the additional retaining element has at least one passage through which the female retaining element or the male retaining element, preferably the male retaining element, can axially protrude.
  • the passage can be formed on a radially outer edge of the additional retaining element, in particular in the region of a tab that protrudes radially outward on an outer circumference of the additional retaining element.
  • the tab of the additional retaining element preferably overlaps the spring structure when viewed axially towards the end wall.
  • the additional retaining element preferably has a plurality of tabs that project outwards when viewed axially towards the additional retaining element, for example two diametrically opposed tabs or four tabs radially opposed in pairs. If the additional retaining element has a plurality of tabs, these are preferably evenly distributed along the outer circumference.
  • a tab has the same angular distance from its directly adjacent tabs or, in the case of two tabs, from its adjacent tab in both circumferential directions, for example 90° for four tabs, 120° for three tabs, or 180° for only two tabs.
  • a passage for the female retaining element or the male retaining element can be formed in the area of each tab, or only for individual tabs.
  • the additional retaining element has several tabs, with one or no passage for the female retaining element and/or the male retaining element being formed alternately in the area of the tabs.
  • the additional retaining element is preferably formed separately from the female retaining element and the male retaining element and is preferably held by the mating engagement of the female retaining element with the male retaining element.
  • the additional retaining element can be formed jointly with the male retaining element or the female retaining element and can be connected to the male retaining element or the female retaining element form a single component.
  • the additional retaining element is directly in mating engagement with the male retaining element or the female retaining element.
  • the additional retaining element overlaps the end wall in an axial view, in particular in an axial view of the first end wall, and holds the pump housing axially together.
  • the additional retaining element overlaps the outlet in an axial view, in particular, the additional retaining element completely covers the outlet in an axial view.
  • the end wall in particular the first end wall, extends further in the radial direction than the additional holding element, such that the end wall protrudes in the radial direction relative to the additional holding element.
  • the additional holding element can have contact with the end wall on its side axially facing the pump housing and can thereby hold the end wall to the pump housing.
  • the additional holding element can preferably be at least partially in axial contact with the end wall, in particular rest on the end wall.
  • the additional holding element has no direct contact with the first end wall.
  • the additional holding element can axially secure the first end wall in the axial direction relative to the peripheral wall and/or the second end wall, in particular through the axial contact with the end wall.
  • the additional retaining element can be in contact, in particular axial contact, exclusively with the female retaining element and/or the male retaining element, the spring structure, and preferably the first end wall.
  • the additional retaining element, with its rear side facing away from the end wall is in contact, in particular axial contact, exclusively with the male retaining element or the female retaining element.
  • the additional retaining element, with its rear side facing away from the end wall is in contact, in particular axial contact, exclusively with the male retaining element.
  • the additional holding element is preferably formed by a plate or a flat shell.
  • the additional holding element can be flat or shell-shaped, in particular concave or convex with respect to the pump housing.
  • the additional holding element is a flat plate.
  • the additional retaining element in particular its circumference, is circular.
  • the additional retaining element can be single-layered or multi-layered.
  • the additional retaining element is preferably formed by one layer.
  • the additional retaining element can be formed by a continuous plate or shell or a perforated plate or shell.
  • the additional retaining element is formed by a perforated plate with at least one passage for the fluid.
  • the additional retaining element can have one or more passages for the fluid.
  • the passages preferably have a circular cross-section, but in alternative embodiments, they can also have a rectangular cross-section.
  • the additional retaining element preferably functions as a throttle and/or cold-start plate.
  • the axial extent of the recess of the female retaining element is greater than the furthest radial extent of the recess.
  • the recess extends more than twice as far in the axial direction as in the radial direction.
  • the recess of the female retaining element extends further in the axial direction than the average thickness of the spring structure, wherein the average thickness of the spring structure is understood to be the arithmetic mean of the possibly varying axial extent of the spring structure over its entire surface.
  • the recess preferably extends to an opening axially facing the spring structure and is closed apart from the opening.
  • the recess of the female retaining element has an opening at a first axial end and a base at a second axial end.
  • a section through the recess of the female retaining element or a portion of the recess transverse to its axial extent is preferably substantially circular, but may also be, for example, elliptical or rectangular.
  • substantially circular within the meaning of the present application is understood to include, in particular, not only circular cross-sections but also cross-sections having a circular core, such as those found, for example, in splines or threads.
  • the recess of the female retaining element has a substantially constant cross-section along its axial extent.
  • the term "substantially constant” is intended to take into account, in particular, cross-sections of a thread that may differ from one another along their axial length depending on the cutting plane.
  • the cross-section of the recess may change along its axial extent, for example, in shape and/or size.
  • the recess of the female retaining element is formed by a blind hole, in particular a circular blind hole.
  • the male retaining element extends through one of the pump housing and the additional retaining element and/or protrudes from one of the pump housing and the additional retaining element.
  • the male retaining element extends through the additional retaining element in the axial direction.
  • the male retaining element extends through the additional retaining element in the axial direction toward the first end wall.
  • the male retaining element preferably has its greatest extent in the axial direction. This means that the male retaining element extends further in the axial direction than in the radial direction.
  • a section through the male retaining element or a portion of the male retaining element transverse to the axial direction of the male retaining element preferably has a substantially circular cross-sectional area, but may also be elliptical, annular, or rectangular, for example.
  • the male retaining element has a cross-section complementary to the cross-section of the recess of the female retaining element.
  • the male retaining element has a variable cross-section along its axial extent.
  • the cross-section can change in shape and/or size, particularly in a stepped manner, between a first part of the male retaining element and a second part of the male retaining element.
  • the male retaining element can have a constant cross-section along its axial extent.
  • the male retaining element has a shaft and a head.
  • the male retaining element can be brought into axially tensile engagement with the female retaining element via the recess in the female retaining element.
  • the male retaining element protrudes at least partially, in particular with its shaft, into the recess of the female retaining element and forms an axially tensile engagement with the female retaining element.
  • the engagement can be positively and/or non-positively engaged.
  • the engagement is advantageously designed to be releasable.
  • the engagement of the female retaining element with the male retaining element can be released non-destructively.
  • the male retaining element has a shaft and a head, wherein the shaft extends axially through a passage of the additional retaining element and into the recess of the female retaining element.
  • the head of the male retaining element is in axial contact with the rear side of the additional retaining element facing axially away from the pump housing and presses the additional retaining element against the spring structure and/or the end wall, so that the spring structure and/or the end wall is held to the pump housing.
  • the male retaining element can form the joining engagement with the female retaining element, for example, by means of a press connection or pressure connection.
  • a press connection or pressure connection the male retaining element has an oversize relative to the recess of the female retaining element, i.e., the male retaining element is pressed or pushed into the recess of the female retaining element.
  • the female retaining element can be pushed or pressed onto the male retaining element, or the male retaining element can be pushed or pressed into the female retaining element. To establish the joining engagement, the female retaining element or the male retaining element is moved toward the other retaining element.
  • one of the retaining elements preferably the female retaining element, is formed or inserted in or on an end wall, preferably the first end wall, or preferably projects into or through the end wall with axial sliding contact.
  • the male retaining element can be, for example, a screw, a blind rivet, a threaded pin, or a press-in bolt or press-in pin.
  • the male retaining element is preferably a standard part.
  • the male retaining element can, for example, be formed by a threaded pin with an external thread, preferably in accordance with DIN EN ISO 4026, DIN EN ISO 4027, DIN EN ISO 4028, or DIN EN ISO 4029 in the version valid on the date of application.
  • one of the retaining elements consisting of the male retaining element and the female retaining element projects from the peripheral wall in front of or through the peripheral wall axially into or through the first end wall.
  • one of the retaining elements consisting of the male retaining element and the female retaining element projects from the second end wall and projects through the peripheral wall and the first end wall.
  • the retaining element can be formed together with the second end wall or can be firmly connected to the second end wall as a separate component.
  • the female retaining element is a standard pin with internal thread, preferably according to DIN EN ISO 8735 or DIN EN ISO 8733.
  • the pump can be, for example, a linear displacement pump or, more preferably, a rotary pump.
  • a rotary pump it can be externally axial, for example, an external gear pump, or internally axial, for example, a vane pump, internal gear pump, or pendulum-slider pump.
  • the conveying element can comprise a rotor that is rotatable about a rotational axis in the conveying chamber and serves to convey the fluid from one or more inlets to one or more outlets.
  • the rotor can advantageously serve to form conveying cells that periodically expand and contract as the rotor rotates in order to convey the fluid from the low-pressure side of the pump to the high-pressure side of the pump.
  • the pump can be driven by the vehicle's drive motor, for example, an internal combustion engine or an electric motor.
  • the pump can be driven either by the internal combustion engine or by the electric motor.
  • the pump drive can also be designed so that the pump can be driven either by the internal combustion engine or the electric motor, or by both of these motors together.
  • the internal combustion engine and the electric motor can drive the pump, in particular via a gear train.
  • the conveyor member is preferably formed by a rotatable conveyor rotor 18, which is non-rotatably connected to a drive shaft 17 and is driven by the latter.
  • Figure 3 is a longitudinal section through the pump.
  • the drive shaft 17 extends axially through the second end wall 13.
  • the rotor 18 is immobilely connected to the drive shaft 17, so that rotation of the drive shaft 17 about the rotational axis R results in rotation of the rotor 18 about the rotational axis R.
  • the conveyor rotor 18 is preferably formed by a rotor of a vane pump with at least one vane. It should be noted that the invention is not limited to vane pumps. The invention can also be used, for example, in pendulum-slide pumps, external gear pumps, or internal gear pumps.
  • the peripheral wall 12 forms a closed ring, while the end walls 11 and 13 each plate-shaped.
  • An outlet for the fluid opens into the end wall 11 on the outer end face axially facing away from the pumping chamber.
  • the pump according to the first embodiment is single-flow, i.e., it has a working flow with one inlet and one outlet. It should be noted at this point that the invention is not limited to single-flow pumps and can also be applied, for example, to multi-flow or multi-circuit pumps, in particular double-flow pumps, with multiple outlets and/or inlets.
  • the pump housing 10 is secured in the axial direction by a securing device 20.
  • the securing device 20 according to the first embodiment comprises a female retaining element 21 with an axially extending recess 22 and a male retaining element 23, which is in axially tensile engagement with the female retaining element 21 in the recess 22, as well as an additional retaining element 24.
  • the spring structure 14 is arranged axially between the first end wall 11 and the additional holding element 24.
  • the additional holding element 24 overlaps the spring structure 14 in an axial view of the first end wall 11 in a radially inner region of the spring structure 14; preferably, the additional holding element 24 overlaps the spring structure with the tabs 25.
  • the additional holding element 24 engages behind the spring structure 14; preferably, the additional holding element 24 engages behind the spring structure with the tabs 25.
  • the spring structure 14 formed as a mechanical spring, in the exemplary embodiment as a disc spring, serves to axially press the housing walls 11, 12 and 13 of the pump housing 1 together when the pump is assembled, thereby sealing the delivery chamber.
  • the securing device 20 serves in particular to axially secure the spring structure 14 to the pump housing 10 and to axially secure the pump housing 10.
  • the female holding element 21, the male holding element 23 and the additional holding element 24 serve to secure the spring structure 14 to the pump housing 10 and to axially secure the pump housing 10.
  • the securing device can axially secure the end wall 11 to the pump housing instead of the spring structure 14.
  • the additional holding element 24 is a separate holding element from the male holding element 23 and the female holding element 21.
  • the additional holding element can also be formed integrally with the female holding element 21 or the male holding element, in particular by the female holding element 21 or the male holding element 23, as shown in the Figures 6 and 7 is revealed.
  • the additional holding element 24 is held on the pump housing 10 by the mating engagement of the male holding element 23 with the female holding element 21.
  • the additional holding element 24 is formed on the side of the first end wall 11 of the pump housing 10.
  • the additional holding element 24 is formed on the side of the pump housing 10 axially remote from the second end wall 13.
  • the additional retaining element 24 has at least one tab 25 on its outer circumference, which protrudes radially outward.
  • the additional retaining element 24 has four tabs 25 that protrude radially outward from the additional retaining element 24.
  • the tabs 25 are evenly distributed over the outer circumference of the additional retaining element 24.
  • the tabs 25 overlap the spring structure 14 when viewed axially toward the end wall 11.
  • the spring structure 14 is in axial contact with the additional retaining element 24, in particular with the tabs 25 of the additional retaining element 24, on a rear side axially facing away from the pump housing 10, and is thereby held on the pump housing 10.
  • the additional retaining element 24 presses the spring structure 14 in the axial direction against the pump housing 10, in particular against the first end wall 11.
  • the additional retaining element 24 also presses the end wall 11 against the pump housing 10, in particular against the peripheral wall 12.
  • the additional holding element 24 has at least one passage through which the female holding element 21 or the male holding element 23 axially protrudes.
  • the male holding element 23 protrudes through the passage of the additional holding element 24 in the axial direction.
  • the additional holding element 24 has a total of two passages for Each has a male retaining element 23.
  • the passages are formed in the region of a tab 25 on the outer edge of the additional retaining element 24.
  • a male retaining element 23 extends through the additional retaining element 24 in the axial direction toward the first end wall 11.
  • the additional holding element 24 is in axial contact with a part of the male holding element 23 on a rear side axially facing away from the pump housing 10 and is pressed in the axial direction against the spring structure 14.
  • the additional holding element 24 in turn presses the spring structure 14 in the axial direction against the pump housing 10, in particular against the first end wall 11, whereby the end wall 11 is held on the pump housing 10.
  • the additional holding element 24 has axial contact with the spring structure 14 and the first end wall 11 on its front side axially facing the pump. In this way, the additional holding element 24 presses the spring structure 14 in the axial direction against the first end wall 11 and the first end wall 11 in the axial direction towards the second end wall 13. In this way, the pump housing 10 is held together in the axial direction.
  • the male retaining element 23 protrudes at least partially into the recess 22 of the female retaining element 21 and forms a joining engagement with the female retaining element 21 that can withstand axial tensile loads.
  • the joining engagement of the male retaining element 23 with the female retaining element 21 is designed to be releasable and, according to the first embodiment, is formed in the form of a screw connection.
  • the male retaining element 23 closes the recess 22 of the female retaining element 21.
  • the male retaining element 23 closes the recess 22 of the female retaining element 21.
  • the additional retaining element 24 is designed in the form of a perforated plate that overlaps, in particular completely overlaps, the outlet of the pump housing 10 in the axial direction. In this way, the additional retaining element 24 also performs a throttling function.
  • the female retaining element 21 is formed on the front side of the additional retaining element 24 facing the pump housing 10.
  • the female retaining element 21 is designed in the form of a holder and is a component of the pump housing 10. It positions the peripheral wall 12 and the end wall 11 relative to each other in terms of angular position.
  • the recess of the female retaining element 21 is provided on the end side of the female retaining element 21 facing the spring structure 14.
  • the female retaining element 21 protrudes from the peripheral wall 12 and through the first end wall 11.
  • the female retaining element 21 protrudes from the second end wall 13 in the axial direction through the peripheral wall 12 and through the first end wall 11. In this way, the female retaining element 21 positions the first end wall 11 and the second end wall 13 with respect to the rotational angular position relative to the peripheral wall 12 and holds them together.
  • the female retaining element 21 is designed in the form of a standard part, in particular a standard pin with an internal thread.
  • the male retaining element 23 is correspondingly designed as a standardized screw, which engages the internal thread of the female retaining element 21.
  • Figure 4 shows the screw engagement of the male retaining element 23 with the female retaining element 21 in detail.
  • the shaft of the male retaining element 23 extends axially through a passage of the additional retaining element 24 and projects into the recess 22 of the female retaining element 21.
  • the passage of the additional retaining element 24 is provided on a radially outer edge of the additional retaining element 24 and can be formed in particular in the region of the tabs 25.
  • the head of the male retaining element 23 presses axially against the additional retaining element 24, so that the additional retaining element 24 has axial contact with the male retaining element 23 on a rear side axially facing away from the pump housing 10.
  • the male retaining element 23 clamps the additional retaining element 24 axially against the pump housing 10.
  • the additional retaining element 24 can be omitted, so that the head of the male retaining element 23 presses axially against the end wall 11, so that the end wall 11 is held on the pump housing.
  • the joining engagement is formed radially inside the spring structure 14 in an axial view of the spring structure 14.
  • the joining engagement is formed in an axial view of the spring structure 14 within the sealing contact with, on the one hand, the first end wall 11 and, on the other hand, the axially opposite end wall 11 in the assembled state of the pump, Figures 1 , 3 and 4 not shown, connecting wall of the receiving device.
  • the joining engagement is provided in the region of the radially outwardly projecting tabs 25.
  • Figure 5 shows the pump of the first embodiment in the installed state.
  • the pump is arranged on or in a receiving device, with the first end wall 11 axially opposite a connecting wall of the receiving device.
  • a pressure connection (not shown in detail) opens into the connecting wall of the receiving device, through which the fluid flowing through the outlet can be discharged.
  • the pump outlet faces axially toward the connecting wall of the receiving device.
  • the receiving device is sealed by a radial seal 16 arranged on the pump housing 10.
  • the spring structure 14 is tensioned between the end face of the first end wall 11 facing the connecting wall and the connecting wall. In this way, the spring structure 14 has axial contact with the first end wall 11 and the connecting wall of the receiving device. In particular, the spring structure 14 has axial sealing contact with the first end wall 11 and the connecting wall, so that it additionally functions as an axial seal separating the high-pressure side from the low-pressure side.
  • the pump has at least one further radial seal 15 for separating the high-pressure side from the low-pressure side, in particular in the region of the peripheral wall of the first end wall 11.
  • the securing device 20 has no axial contact with the connecting wall of the receiving device.
  • the securing device 20 has no axial sealing contact, in particular no pressure contact, with the connecting wall of the receiving device.
  • neither the male retaining element 23 nor the additional retaining element 24 nor the female retaining element 21 have axial contact with the connecting wall of the receiving device.
  • the safety device 20 is designed exclusively on the high-pressure side of the pump. This means that the safety device 20, in particular the additional holding element 24 and the male holding element 23, are only exposed to fluid, which is discharged by the pump through the outlet.
  • the spring structure 14 surrounds the securing device 20 radially outward, with the additional holding element 24 at least partially axially overlapping the spring structure 14.
  • Figure 2 shows an isometric view of a pump according to a second embodiment. Unless otherwise stated, the statements regarding the first embodiment, unless they contradict the embodiment according to Figure 2 their validity.
  • the pump from Figure 2 differs from the pump of the first embodiment in that the additional holding element 34 does not have any tabs on the outer circumference which project radially outwards and that the additional holding element 34 does not overlap with the spring structure 14 in an axial view of the spring structure 14.
  • Figure 6 shows a third embodiment in which the male retaining element 43 is formed by the additional retaining element 44 and does not extend through it.
  • the additional retaining element 44 in particular the tabs 25, has a convex curvature or bulge that protrudes from the additional retaining element 44 toward the first end wall 11 or toward the female retaining element 41.
  • the male retaining element of the additional retaining element 44 can also be formed as a projecting pin, cam, or the like.
  • a plug-in engagement is also understood to mean a snap-in or locking engagement of the retaining elements, similar to a push-button connection. It is generally advantageous if the respective plug-in engagement is designed such that the recess 42 or 52 is closed by the male retaining element 43 or 53 to such an extent that any dirt particles that may have entered the recess 42 or 52 are enclosed and are not discharged during pump operation.
  • the male retaining element 63 has an external thread, in particular a metric external thread, at its end axially remote from the second end wall 13.
  • the male retaining element 63 can have a thread only in one axial end section, in both axial end sections, or be designed as a threaded pin having a thread over its entire axial length. In designs as a threaded pin with a continuous thread over the axial length or with threads at the axial ends, the male retaining element 63 is preferably in screw engagement with both the female joining element 62 and the second end wall 13.
  • retaining elements in the form of screw elements can be firmly joined to the additional retaining element 24 and preferably arranged on the tabs 25.
  • the respective screw counter-element is axially fixed to the pump housing 10, but is rotatably connected to the pump housing 10 in order to be able to establish the joining engagement as a screw engagement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Claims (15)

  1. Pompe pour alimenter un ensemble en fluide, la pompe comprenant:
    1.1 un boîtier de pompe (10) présentant
    - une entrée pour le fluide sur un côté basse pression,
    - une sortie pour le fluide sur un côté haute pression,
    - une paroi circonférentielle (12) entourant radialement une chambre de refoulement, et
    - une paroi frontale (11) présentant une face frontale extérieure axialement opposée à la chambre de refoulement, sur laquelle débouche la sortie ;
    1.2 une structure à ressort (14) disposée sur la face frontale extérieure de la paroi frontale (11) ;
    1.3 un élément de refoulement (17, 18) mobile à l'intérieur de la chambre de refoulement pour refouler le fluide depuis le côté basse pression vers le côté haute pression ;
    1.4 un dispositif de blocage (20) pour bloquer axialement, en particulier pour le transport, le boîtier de pompe (10), le dispositif de blocage (20) comprenant
    - un élément de maintien femelle (21 ; 41 ; 51 ; 61) présentant un évidement s'étendant axialement (22 ; 42 ; 52 ; 62),
    - un élément de maintien mâle (23 ; 43 ; 53 ; 63) qui est en engagement de joint pouvant être sollicité en traction axiale avec l'élément de maintien femelle (21 ; 41 ; 51 ; 61) dans l'évidement (22 ; 42 ; 52 ; 62), et
    - un élément de maintien supplémentaire (24 ; 34 ; 44 ; 54 ; 64) ;
    1.5 la structure à ressort (14) et / ou la paroi frontale (11) étant maintenue(s) par l'un des éléments de maintien sur le boîtier de pompe (10) par l'intermédiaire de l'engagement de joint,
    caractérisée en ce que
    1.6 le dispositif de blocage (20) n'est pas en contact d'étanchéité axial avec une paroi de raccordement d'un dispositif de réception lorsque la pompe est installée et
    1.7 l'élément de maintien supplémentaire (24 ; 34 ; 44 ; 54 ; 64) chevauche la paroi frontale (11) en vue axiale et maintient le boîtier de pompe (10) ensemble axialement.
  2. Pompe selon la revendication précédente, dans laquelle la structure à ressort (14) et / ou la paroi frontale (11) est ou sont en contact axial avec l'un des éléments de maintien sur une face frontale extérieure axialement opposée à la chambre de refoulement et ainsi maintenue(s) sur le boîtier de pompe (10).
  3. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien supplémentaire (24 ; 34 ; 44 ; 54 ; 64) est formé séparément de l'élément de maintien femelle (21 ; 41 ; 51 ; 61) et de l'élément de maintien mâle (23 ; 43 ; 53 ; 63) et maintenu par l'intermédiaire de l'engagement de joint des éléments de maintien, l'élément de maintien femelle (21 ; 41 ; 51 ; 61) et / ou l'élément de maintien mâle (23 ; 43 ; 53 ; 63) traversant de préférence l'élément de maintien supplémentaire (24 ; 34 ; 44; 54 ; 64).
  4. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien supplémentaire (24 ; 34 ; 44 ; 54 ; 64) est formé par une plaque ou une coque plate concave ou convexe par rapport au boîtier de pompe (10), l'élément de maintien supplémentaire (24 ; 34 ; 44 ; 54 ; 64) étant de préférence perforé et / ou monocouche et / ou circulaire.
  5. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien supplémentaire (24 ; 34 ; 44 ; 54 ; 64) comprend en outre la fonction d'un étrangleur et / ou d'une plaque de démarrage à froid.
  6. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien supplémentaire (24 ; 44 ; 54 ; 64) chevauche la structure à ressort (14) en vue axiale de la structure à ressort (14) et maintient la structure à ressort (14) sur le boîtier de pompe (10).
  7. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien supplémentaire (24) présente au moins une languette (25) faisant saillie radialement qui chevauche la structure à ressort (14) en vue axiale de la structure à ressort (14) et maintient la structure à ressort (14) sur le boîtier de pompe (10).
  8. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien femelle (21 ; 41 ; 51 ; 61) ou l'élément de maintien mâle (23 ; 43 ; 53 ; 63) est en contact axial avec une face arrière de l'élément de maintien supplémentaire (24 ; 34 ; 44 ; 54 ; 64) axialement opposée au boîtier de pompe (10), l'élément de maintien supplémentaire (24 ; 34 ; 44 ; 54 ; 64) pressant contre la structure à ressort (14) et / ou contre la paroi frontale (11).
  9. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien supplémentaire (24 ; 34 ; 44 ; 54 ; 64) est en contact exclusivement avec l'élément de maintien femelle (21 ; 41 ; 51 ; 61) et / ou l'élément de maintien mâle (23 ; 43 ; 53 ; 63) et / ou la structure à ressort (14) et / ou la paroi frontale (11) lorsque la pompe est installée.
  10. Pompe selon l'une quelconque des revendications précédentes, dans laquelle la structure à ressort (14) est en contact d'étanchéité avec la paroi frontale (11) et / ou la paroi de raccordement du dispositif de réception lorsque la pompe est installée.
  11. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien femelle (21 ; 41 ; 51 ; 61) ou l'élément de maintien mâle (23 ; 43 ; 53 ; 63) fait saillie axialement à partir de la paroi circonférentielle (12) ou à travers la paroi circonférentielle (12) et dans la paroi frontale (11) ou à travers la paroi frontale (11).
  12. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien femelle (21 ; 41 ; 51 ; 61) et / ou l'élément de maintien mâle (23 ; 43 ; 53 ; 63) est ou sont disposé(s) sur le côté haute pression de la pompe.
  13. Pompe selon l'une quelconque des revendications précédentes, dans laquelle la structure à ressort (14) entoure l'élément de maintien femelle (21 ; 41 ; 51 ; 61) et / ou l'élément de maintien mâle (23 ; 43 ; 53 ; 63) en direction radiale.
  14. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien femelle (21 ; 61) et l'élément de maintien mâle (23 ; 63) sont en engagement de joint par l'intermédiaire d'une liaison à vis.
  15. Pompe selon l'une quelconque des revendications précédentes, dans laquelle l'élément de maintien femelle (21 ; 61) et l'élément de maintien mâle (23 ; 63) sont formés par des pièces normalisées à filetage métrique, l'élément de maintien femelle (21 ; 61) étant de préférence une goupille normalisée à filetage intérieur et l'élément de maintien mâle (23 ; 63) étant de préférence une vis mécanique correspondante.
EP22200759.3A 2021-10-12 2022-10-11 Pompe avec dispositif de retenue axiale Active EP4166752B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021126416.2A DE102021126416A1 (de) 2021-10-12 2021-10-12 Axialsicherung einer Pumpe

Related Parent Applications (1)

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DE102021126416 Previously-Filed-Application 2021-10-12

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EP4166752A1 EP4166752A1 (fr) 2023-04-19
EP4166752B1 true EP4166752B1 (fr) 2025-08-13
EP4166752C0 EP4166752C0 (fr) 2025-08-13

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US (1) US11815102B2 (fr)
EP (1) EP4166752B1 (fr)
CN (1) CN115962126A (fr)
DE (1) DE102021126416A1 (fr)

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US5876192A (en) * 1996-11-08 1999-03-02 Ford Global Technologies, Inc. Differential expansion control assembly for a pump
DE112009002350A5 (de) 2008-10-22 2011-06-30 ixetic Bad Homburg GmbH, 61352 Pumpe, insbesondere Flügelzellenpumpe
CN104541058B (zh) 2012-06-12 2016-08-24 麦格纳动力系巴德霍姆堡有限责任公司 泵
DE102013209877A1 (de) 2013-05-28 2014-12-04 Mahle International Gmbh Pendelschieberpumpe
DE102015017078B4 (de) 2015-04-17 2019-10-24 Schwäbische Hüttenwerke Automotive GmbH Pumpe
DE102015105928B4 (de) 2015-04-17 2018-05-17 Schwäbische Hüttenwerke Automotive GmbH Pumpe
DE102015105933B4 (de) * 2015-04-17 2018-04-26 Schwäbische Hüttenwerke Automotive GmbH Pumpe
DE102016200893A1 (de) * 2016-01-22 2017-07-27 Magna Powertrain Bad Homburg GmbH Pumpeneinsatz
DE102016204098B4 (de) 2016-03-11 2019-09-12 Magna Powertrain Bad Homburg GmbH Flügelzellenpumpe
DE102018133680A1 (de) * 2018-12-28 2020-07-02 Schwäbische Hüttenwerke Automotive GmbH Rotationspumpe mit axialer Kompensation, Auslassdichtung für eine Pumpe sowie vormontierte Pumpeneinheit
DE102018133679A1 (de) * 2018-12-28 2020-07-02 Schwäbische Hüttenwerke Automotive GmbH Rotationspumpe mit axialer Kompensation, Auslassdichtung für eine Pumpe sowie vormontierte Pumpeneinheit
DE102019103675A1 (de) * 2019-02-13 2020-08-27 Schwäbische Hüttenwerke Automotive GmbH Feder-Dichtungs-Einheit
DE102019215933A1 (de) * 2019-07-26 2021-01-28 Hanon Systems Efp Deutschland Gmbh Flügelzellenpumpe
DE102019132729A1 (de) * 2019-12-02 2021-07-01 Schwäbische Hüttenwerke Automotive GmbH Sickendichtung
DE102020116731A1 (de) * 2020-06-25 2021-12-30 Schwäbische Hüttenwerke Automotive GmbH Pumpe mit befestigter Dichtung
DE102020116822A1 (de) 2020-06-25 2021-12-30 Schwäbische Hüttenwerke Automotive GmbH Axiale Druckentlastung in Gleitlagern von Pumpen
DE102020133200A1 (de) * 2020-12-11 2022-06-15 Schwäbische Hüttenwerke Automotive GmbH Sickendichtung
JP7141481B2 (ja) 2021-02-26 2022-09-22 Ｋｙｂ株式会社 カートリッジ式ベーンポンプ及びこれを備えるポンプ装置

Also Published As

Publication number Publication date
US11815102B2 (en) 2023-11-14
US20230113025A1 (en) 2023-04-13
CN115962126A (zh) 2023-04-14
DE102021126416A1 (de) 2023-04-13
EP4166752A1 (fr) 2023-04-19
EP4166752C0 (fr) 2025-08-13

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