DE102016226069A1 - Gear machine and method of manufacturing a gear machine - Google Patents

Abstract

The invention relates to a gear machine (1), wherein a component (22, 26) is formed by a bushing (28, 30) on whose axial end section (22a, 18b) facing a side surface (20, 24) of toothed wheels (16, 18) , 26a) a thrust washer (32, 34) is arranged.

Description

The invention relates to a gear machine. The invention further relates to a method for producing a gear machine.

State of the art

In a Rankine process, medium is pumped in a circle and heated via at least one evaporator. In many cases, two evaporators are used. The goal is to reach steam in each path, or at least to reach 100% steam after the two paths have joined. For this purpose, a precisely calculated flow rate is usually conveyed via a feed pump, preferably designed as an external gear pump.

The DE 199 24 057 A1 discloses a gear machine with a housing having an interior space in which is arranged at least one gear arrangement having at least two externally meshing gears, on which for axial sealing on a first side surface at least a first axially displaceable component and on a second side surface at least a second axially displaceable component is pressed,

Disclosure of the invention

The present invention provides a gear machine with a housing having an interior, in which at least one gear arrangement is arranged, which has at least two externally meshing gear wheels, wherein for axial sealing of a side surface of the gears, a component is arranged contacting the side surface, wherein the component is formed by a first bushing, on whose, the side surface of the gears facing axial end portion of a thrust washer is arranged.

The present invention further provides a method of manufacturing a gear machine. The method comprises producing a housing having an interior space in which at least one gear arrangement is arranged, which has at least two toothed wheels meshing with each other in external engagement.

The method further comprises contacting a component on a side surface of the gears to axially seal the side surface of the gears.

The method further comprises forming the component through a first socket. The method further includes locating a thrust washer on an axial end portion of the first sleeve facing the side surface of the gears.

An idea of the present invention is, by providing a respective component comprising a bushing and arranged on the bush or firmly connected to this thrust washer, which component is thus designed as a collar, advantageously a conventionally used radial bearing in conjunction with a stop plate to replace. Due to the omission of the aforementioned radial bearing in conjunction with the starting plate also eliminates an associated additional sealing point, which is very expensive to produce as a plate.

Advantageous embodiments and further developments emerge from the dependent claims and from the description with reference to the figures.

According to a preferred refinement, it is provided that the thrust washer arranged on the axial end section facing the side surface of the toothed wheels is welded to the first bushing. Thus, advantageously, the radial bearing and the thrust plate can be replaced by an integrally formed component.

According to another preferred embodiment, it is provided that the component is combined to form a flange bushing and pressed into a second bushing or screwed to the second bushing. After the components have been pressed in, a module socket can be machined completely in a single clamping with very good form and position tolerances.

According to a further preferred embodiment, it is provided that the first socket and the thrust washer are firmly connected to each other. Thus, the collar bushing can be formed in an advantageous manner.

According to a further preferred development, it is provided that the first component and the second component have a carrier layer with a plurality of metal layers, preferably steel and / or bronze. As a result, a good strength of the carrier layer can be achieved.

According to a further preferred development, it is provided that the component has a carrier layer with a plurality of metal layers, preferably steel and / or bronze, and a plastic layer, preferably a peek layer or a PTFE layer. By providing the additional plastic layer, flatness defects due to machining can be reduced to a minimum.

According to a further preferred embodiment, it is provided that an O-ring is arranged on an end face of the second socket. Thus, advantageously no gap between the other socket and the component or the socket exist, whereby leakage from the pressure side over the gap between the housing and a radial edge of the thrust washer can be prevented.

According to a further preferred embodiment, it is provided that the thrust washers have openings into which fastening means for fastening the component to the second sleeve of the external gear pump can be inserted. The tight fit of the component can thus be replaced or supplemented by an axial screw through the thrust washer of the component.

According to a further preferred embodiment, it is provided that the component is formed with a transition fit to the second socket and in this a respective shaft of the gears is mounted. Thus, an optimal centering can be achieved and heat generated by a bearing point can be transferred to the second socket. At high temperatures, therefore, no tight fit must be ensured in an advantageous manner, in the low temperature case a pressure is advantageously limited to a low level, since the second bush is formed of aluminum, which shrinks more than the steel layer of the socket of the component and thus a Temperature-dependent bearing gap change is limited.

According to another preferred embodiment, it is provided that the fastening means are formed by screws, wherein a screw head of a respective screw in the inserted into the opening of the thrust washer state is positioned spaced from a swept by gear edges sealing surface of the first socket. The screws can advantageously compensate for positional tolerances between a radial bearing shell region of the component and the screw position.

According to a further preferred development, it is provided that reversing edges are introduced, preferably milled, into the thrust washer, wherein the reversing edges are introduced into the thrust washer in a preassembly state of the thrust washer or after a press-fit of the second bush. Thus, flexibility of the manufacturing process can be improved.

The described embodiments and developments can be combined with each other as desired.

Further possible refinements, developments and implementations of the invention also include combinations, not explicitly mentioned, of features of the invention described above or below with regard to the exemplary embodiments.

list of figures

The accompanying drawings are intended to provide further understanding of the embodiments of the invention. They illustrate embodiments and, together with the description, serve to explain principles and concepts of the invention.

Other embodiments and many of the stated advantages will become apparent with reference to the drawings. The illustrated elements of the drawings are not necessarily shown to scale to each other.

• 1 eine Längsschnittansicht einer Zahnradmaschine gemäß einer bevorzugten Ausführungsform der Erfindung;
• 2 eine schematische Darstellung eines erfindungsgemäßen Bauteils der Zahnradmaschine gemäß der bevorzugten Ausführungsform der Erfindung;
• 3 eine Detailansicht des Bauteils in einem Montagezustand gemäß der bevorzugten Ausführungsform der Erfindung;
• 4 eine schematische Darstellung des Bauteils gemäß einer weiteren bevorzugten Ausführungsform der Erfindung;
• 5 eine schematische Darstellung der Zahnradpumpe mit geöffnetem Deckel gemäß der weiteren bevorzugten Ausführungsform der Erfindung; und
• 6 ein Ablaufdiagramm eines Verfahrens zum Herstellen einer Zahnradmaschine gemäß der bevorzugten Ausführungsform der Erfindung.

Show it:

• 1 a longitudinal sectional view of a gear machine according to a preferred embodiment of the invention;
• 2 a schematic representation of a component according to the invention of the gear machine according to the preferred embodiment of the invention;
• 3 a detailed view of the component in a mounting state according to the preferred embodiment of the invention;
• 4 a schematic representation of the component according to another preferred embodiment of the invention;
• 5 a schematic representation of the gear pump with the lid open according to the further preferred embodiment of the invention; and
• 6 a flowchart of a method for manufacturing a gear machine according to the preferred embodiment of the invention.

In the figures of the drawings, like reference characters designate like or functionally identical elements, components or components unless otherwise indicated.

1 shows a longitudinal sectional view of a gear machine according to a preferred embodiment of the invention.

The gear machine 1 has a housing 10 on. The housing 10 has an interior 12 on. In the interior 12 is at least one Gear arrangement 14 is arranged, the at least two meshing with each other in external engagement gears 16 . 18 having. For the axial sealing of a first side surface 20 the gears 16 . 18 is at least a first component 22 intended. For the axial sealing of a second side surface 24 the gears 16 . 18 is at least a second component 26 intended.

The first component 22 and the second component 26 contact the respective side surfaces 20 . 24 the gears 16 . 18 , wherein the first component 22 and the second component 26 through a first socket 28 . 30 are formed, at whose, the side surfaces 20 . 24 the gears 16 . 18 facing axial end portion 22a, 26a a thrust washer 32 . 34 is arranged.

The on the, the respective side surface 20 . 24 the gears 16 . 18 facing axial end portion 22a . 26a arranged thrust washer 32 . 34 is preferably with the socket 28 . 30 welded to a collar bushing. Alternatively, another suitable connection may be provided.

The first component 22 and the second component 26 are preferably on one on a gear shaft 35 arranged (in 1 not shown) second socket or with the (in 1 not shown) screwed second sleeve of the gear machine.

Alternatively to the provision of the first component 22 and the second component 26 For example, only a component in the form of a socket on a predetermined side of the gears 16 . 18 be arranged.

2 shows a schematic representation of a component according to the invention of the gear machine according to the preferred embodiment of the invention. The socket 28 of the first component 22 is preferably formed as a hollow cylinder. At the axial end portion 22a of the component 22 is the thrust washer 32 arranged. The first component 22 and that (in 2 not shown) second component preferably have a carrier layer with a plurality of metal layers, preferably steel and / or bronze on. The first component 22 and the second component preferably additionally comprise a plastic layer, preferably a peek layer. Alternatively, for example, a PTEF layer may be provided.

3 shows a detailed view of the component in a mounting state according to the preferred embodiment of the invention. At one end 36a the second socket 36 Preferably, an O-ring 39 is arranged. A weld 49 connects the thrust washer 32 with the socket 28 ,

4 shows a schematic representation of the component according to another preferred embodiment of the invention. The thrust washer 32 preferably has a plurality of openings 40 of which, by way of example, in FIG 4 one is shown. In the openings 40 are preferably fasteners 42 for fixing the first component 22 and the second component 26 at the second socket 36 the external gear pump can be inserted. The first component 22 is preferably with a transition fit to the second socket ( 36 ) is formed and in this a respective shaft of the gears ( 16 , 18) stored. The fasteners 42 are preferably formed by screws. A screw head 44 a respective screw is in the opening 40 the thrust washer 32 inserted state of one of gear flanks (in 4 not shown) swept sealing surface of the socket 28 positioned at a distance.

Into the thrust washer 32 are preferably Umsteuerkanten 48 introduced, preferably milled, wherein the Umsteuerkanten in a pre-assembly state of the thrust washer 32 into the thrust washer 32 be introduced or can be introduced. Alternatively, the Umsteuerkanten after pressing the second socket 36 on the gear shaft 35 into the thrust washer 32 be introduced.

5 shows a schematic representation of the gear pump with the lid open according to the further preferred embodiment of the invention. A (in 5 not shown) screw head of a respective screw is in the opening 40 the thrust washer 32 inserted state of a swept by gear edges sealing surface 46 the socket 28 positioned at a distance.

6 shows a flowchart of a method for manufacturing a gear machine according to the preferred embodiment of the invention. The method comprises producing a housing having an interior space in which at least one gear arrangement is arranged, which has at least two toothed wheels meshing with each other in external engagement.

The method further comprises contacting at least a first component on a first side surface of the gears to axially seal the first side surface of the gears and a second component on a second side surface of the gears for axially sealing the second side surface of the gears.

The method further comprises forming the first component and the second component through a first bushing or to a collar bushing. The method further includes placing a thrust washer on one of the respective ones Side surface of the gears facing, axial end portion of the socket.

Although the present invention has been described above with reference to preferred embodiments, it is not limited thereto but is modifiable in a variety of ways. In particular, the invention can be varied or modified in many ways without deviating from the gist of the invention.

For example, a shape, size and / or nature of the components of the gear machine can be modified according to respective structural or constructive requirements.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19924057 A1 [0003]

Claims (11)

Gear machine (1) with a housing (10) having an interior space (12) in which at least one gear arrangement (14) is arranged, which has at least two externally meshing gears (16, 18), wherein for the axial sealing of a Side surface (20, 24) of the gears (16, 18) a component (22, 26), the side surface (20, 24) is arranged in contact, wherein the component (22, 26) by a first bush (28, 30) is formed , on whose, the side surface (20, 24) of the gear wheels (16, 18) facing the axial end portion (22a, 26a) a thrust washer (32, 34) is arranged. Gear machine after Claim 1 , characterized in that at the, the side surface (20, 24) of the gears (16, 18) facing the axial end portion (22a, 26a) arranged thrust washer (32, 34) with the first sleeve (28, 30) is welded. Gear machine after Claim 1 or 2 , characterized in that the component (22, 26) combined to form a flanged bushing and in a second bushing (36) or screwed to the second bushing (36). Gear machine according to one of the preceding claims, characterized in that the first bush (28, 30) and the thrust washer (32, 34) are fixedly connected to each other. Gear machine according to one of the preceding claims, characterized in that the component (22, 26) has a carrier layer with a plurality of metal layers, preferably steel and / or bronze, and a plastic layer, preferably a peek layer or a PTFE layer. Gear machine according to one of the Claims 3 to 5 , characterized in that an O-ring (39) is arranged on an end face (36a) of the second bushing (36). Gear machine according to one of the preceding claims, characterized in that the thrust washers (32, 34) openings (40) into which fastening means (42) for securing the component (22, 26) to the second sleeve (36) of the external gear pump can be inserted , Gear machine according to one of the Claims 3 to 7 , characterized in that the component (22, 26) is formed with a transition fit to the second sleeve (36) and in this a respective shaft of the gears (16, 18) is mounted. Gear machine after Claim 7 or 8th , characterized in that the fastening means (42) are formed by screws, wherein a screw head (44) of a respective screw in the opening (40) of the thrust washer (32, 34) inserted state of a swept by tooth flanks sealing surface (46) first socket (28, 30) is positioned at a distance. Gear machine according to one of the Claims 3 to 9 , Characterized in that the thrust washer (32, 34) introduced Umsteuerkanten (48) are preferably milled, wherein the Umsteuerkanten (48) in a pre-assembly of the thrust washer (32, 34) or by a press-fitting the second bush (36) in the thrust washer (32, 34) are introduced. Method for producing a gear machine (1), comprising the steps: Producing (S1) a housing (10) having an internal space (12) in which at least one gear arrangement (14) is arranged, which has at least two externally meshing gearwheels (16, 18); Contacting (S2) a component (22, 26) on a side surface (20, 24) of the gears (16, 18) to axially seal the side surface (20, 24) of the gears (16, 18); Forming (S3) the component (22, 26) through a first socket; and Arranging (S4) a thrust washer (32, 34) on an axial end portion (22a, 26a) of the first bush facing the side surface (20, 24) of the gears (16, 18).

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