DE102017004248A1 - Adjustable vane pump - Google Patents

Abstract

The present invention relates to an adjustable vane pump, in particular for conveying oil, with a about a rotation axis (11) rotatable rotor (10) which is arranged between two axial walls (31, 32) and a plurality of radially adjustable wings (12) abutting a vane ring (20) of the vane pump pivotable about a pivot axis (25) such that pairs of adjacent vanes (12) together with the two axial walls (31, 32), the rotor (10) and the slip ring (20) Pumping chambers (1-8) whose volumes vary as the rotor (10) in the slip ring (20) rotates about its axis of rotation (11) to promote fluid from an inlet (51) to an outlet (52) Volumes of the pumping chambers (1-8) by pivoting the sliding ring (20) about its pivot axis (25) are adjustable, wherein at least between one of the axial walls (31, 32) and one of these opposite axial end face (21, 22) of the sliding ring ( 20) a seal (41, 42) a is subordinate.

Description

The present invention relates to an adjustable vane pump and an internal combustion engine and a motor vehicle with the vane pump.

An object of an embodiment of the present invention is to improve an adjustable vane pump.

This object is achieved by a vane pump with the features of claim 1. Claims 10, 11 provide an internal combustion engine and a motor vehicle with at least one vane pump described here under protection. Advantageous embodiments of the invention are the subject of the dependent claims.

According to one embodiment of the present invention, a vane pump has a one-part or multi-part rotor which, in particular by a drive or a drive shaft and / or fixed or variable speed, rotatable about a, in particular relative to a housing of the vane pump fixed, rotational axis is.

The rotor according to an embodiment of the present invention is arranged (axially) between two walls, which in the present case are referred to as axial walls.

The two walls are or are in one embodiment with each other, in particular non-destructively solvable or non-destructive releasably, in particular form, friction and / or frictionally engaged, connected, in particular screwed. One or both walls have in one embodiment (each) a flange surrounding the rotor radially outward.

Similarly, a separate housing ring radially outwardly surrounding the rotor and with two axial walls, in particular non-destructively detachable or non-destructive releasably, in particular form, friction and / or frictionally engaged, connected, in particular screwed, or be.

One or the housing of the vane pump has in one embodiment, the two axial walls and optionally the housing ring.

By a non-destructively releasable connection in one embodiment, a production, (De) installation and / or maintenance of the vane pump can be improved by a non-destructive releasable connection in one embodiment, their strength and / or tightness.

According to one embodiment of the present invention, the rotor has a plurality, in particular at least two, in particular at least four, in particular at least six, radially adjustable, in particular displaceable (on, in particular, stored in the rotor) s wings, in particular sealing and / or prestressed, abut against a sliding ring of the vane pump, which is pivotable about a, in particular relative to one or the housing of the vane pump stationary and / or spaced from the axis of rotation and / or parallel, pivot axis, wherein pairs (in the circumferential direction) of adjacent wings together with the two axial walls, the rotor, in particular its radial outer side, and the sliding ring, in particular its radial inner side, (respectively) form or limit pumping chambers, wherein the vane pump is designed or arranged such that the volumes of these pumping chambers, in particular cyclically , vary when or by the rotor in the Rotary ring rotates about its axis of rotation to or so that fluid from an inlet to an outlet to promote or can be or be promoted, the volumes of the pumping chambers are adjustable by pivoting of the sliding ring about its pivot axis or be adjusted.

In this way, in one embodiment, a delivery volume of the vane pump can be advantageously adjusted, in particular at a fixed rotational speed of the rotor.

According to one embodiment of the present invention is at least (axially) between one of the axial walls, which is hereinafter also referred to without limitation of generality as a first (axial housing) wall, and an end face of the sliding ring, which this axially opposite and as (First) axial end face is called, a one- or multi-part (first) seal arranged.

As a result, in one embodiment, a leakage between (first axial housing) wall and (first) axial end side advantageously reduced and thereby reduced in one embodiment consumption and / or size of the vane pump and / or control, in particular control, the vane pump can be improved ,

In one embodiment is also (axially) between the other of the two axial walls, which is hereinafter also referred to as a second (axial housing) wall, and another end face of the sliding ring, this axially opposite and correspondingly as (second ) Axial end face is called, a one or more parts further (second) seal arranged.

As a result, leakage between the second axial (housing) wall and further or second axial end side may be advantageous in one embodiment reduced and thereby further reduced in one embodiment consumption and / or size of the vane pump and / or a control, in particular control, the vane pump can be further improved.

In one embodiment, the one (first) seal and / or the further (second) seal (in each case) is arranged at least partially in an (axially) frontal or axial groove, in particular a ring or partial annular groove, of the sliding ring.

As a result, in one embodiment, it can be advantageous, in particular compact, supported and / or its sealing function and / or assembly improved.

In the present case, the directional indication "axially" designates in particular a direction parallel to the axis of rotation and / or pivot, a circumferential direction corresponding in particular to a direction of rotation about this axis, the directional indication "radially" corresponding in particular to a direction which is perpendicular to the axial and circumferential directions.

In one embodiment, the axial groove in which the (first) seal is at least partially disposed, and / or the axial groove in which the further (second) seal is at least partially disposed, is / are together with the Slip ring shaped, in particular sintered.

As a result, in one embodiment, they can be formed advantageously, in particular quickly and / or cheaply.

Additionally or alternatively, in one embodiment, this axial groove is produced in a material-removing manner, in particular by machining.

As a result, it can be advantageous in one embodiment, in particular precisely finished. Equally, in another embodiment, it can already be finished by the primary molding, so that a material-removing machining, in particular finishing or finishing, can be dispensed with and thus the groove in one embodiment can be formed particularly quickly and / or favorably.

In one embodiment, the (first) seal and / or the further (second) seal extends (respectively in the circumferential direction) at least along or over 25%, in a development at least 45%, in particular at least 55%, and / or at most 75% , In particular at most 65%, of a circumference of the axial end face on which it is or is, in one embodiment in particular along or over 100% or along or over the entire circumference (s) or is this seal ring-like , in another embodiment, only along one or over a part (s) of the circumference of the axial end face or is this seal part ring, in particular circular segment-like or open in the circumferential direction.

Additionally or alternatively, it extends in one embodiment (in the circumferential direction) at least along or over the inlet (es) and / or at least along or over the outlet (es) or its extent in the circumferential direction.

By such a minimal extent, in one embodiment, in each case a leakage can advantageously be reduced, thereby reducing in one embodiment a consumption and / or a size of the vane pump and / or a control, in particular control, of the vane pump can be improved.

Through an extension along or over the entire circumference or an annular seal, the leakage can be maximally reduced in one embodiment, by an extension along or over only a portion of the circumference or a partial ring, in particular circular segment-like, seal in a design weight , Manufacture and / or assembly improved and / or friction when pivoting or adjusting the sliding ring can be reduced.

By extending at least along the outlet or at least over the outlet, a leakage can be advantageously reduced, in particular in this region of higher pressures.

In one embodiment, the (first) seal and / or the further (second) seal (respectively) in an undeformed state has a circular cross-section. Additionally or alternatively, the (first) seal arranged between the one (first) axial wall and the one (first) axial end side and / or the further arranged between the other or second axial wall and the further (second) end side is or (second) seal at least, in particular only, elastically deformed.

As a result, in one embodiment, the sealing function and / or assembly can be improved.

In one embodiment, the (first) seal and / or the further (second) seal (in each case) one or more elastomers, in particular rubber, in one embodiment of ethylene-acrylate rubber (AEM), on, they may in particular be made thereof or be or persist.

As a result, in one embodiment, the sealing function and / or assembly can be improved.

Additionally or alternatively, in one embodiment, the rotor, the slip ring and / or at least one of the axial walls of metal, in particular at least one light metal, and / or plastic, he or she may in particular be made thereof, in particular urgeformt, be or be.

As a result, weight and / or strength can be improved in one embodiment.

In one embodiment, the vane pump has a control chamber for hydraulically pivoting the slide ring about its pivot axis. The control chamber is or is at least partially formed or limited in one embodiment by the sliding ring and the two axial walls. In one embodiment, the sliding ring is biased by a spring means about its pivot axis and / or actuates the control chamber with the same fluid or actuated, which promotes the vane pump.

As a result, the vane pump can advantageously be adjusted in one embodiment and the slide ring advantageously pivoted.

A vane pump according to the invention can in particular be suitable for conveying oil and therefore can be set up or used for this purpose. With particular advantage, a vane pump according to the invention is used in an internal combustion engine or a motor vehicle.

• 1 einen Schnitt durch eine Flügelzellenpumpe nach einer Ausführung der vorliegenden Erfindung längs der Linie I-I in 2;
• 2 einen Teilschnitt durch die Flügelzellenpumpe längs der Linie II-II in 1;
• 3 einen Schnitt durch eine Flügelzellenpumpe nach einer weiteren Ausführung der vorliegenden Erfindung längs der Linie I-I in 4; und
• 4 einen Teilschnitt durch diese Flügelzellenpumpe längs der Linie II-II in 3.
• 1, 2 zeigen eine verstellbare Flügelzellenpumpe nach einer Ausführung der vorliegenden Erfindung in einem Schnitt senkrecht zu einer Rotationsachse 11 (1) bzw. senkrecht zu einer Umfangsrichtung (2).

Further advantageous developments of the present invention will become apparent from the dependent claims and the following description of preferred embodiments. This shows, partially schematized:

• 1 a section through a vane pump according to an embodiment of the present invention along the line II in FIG 2 ;
• 2 a partial section through the vane pump along the line II-II in 1 ;
• 3 a section through a vane pump according to another embodiment of the present invention along the line II in FIG 4 ; and
• 4 a partial section through this vane pump along the line II-II in 3 ,
• 1 . 2 show an adjustable vane pump according to an embodiment of the present invention in a section perpendicular to a rotation axis 11 ( 1 ) or perpendicular to a circumferential direction ( 2 ).

The vane pump has a rotor 10 on, around the axis of rotation 11 is rotatable.

The rotor 10 is axial (vertical in 2 ) between two axial housing walls 31 . 32 a housing of the vane pump arranged through a housing ring 33 (see. 1 ) are interconnected.

The rotor 10 has a plurality of radially displaceable wings 12, which by a guide ring 13 sealing against a sliding ring 20 the vane pump to be clamped, which is about a pivot axis 25 is pivotally mounted so that pairs in the circumferential direction of adjacent wings 12 together with the two axial walls 31 . 32 , the radial outside of the rotor 10 and the radially opposite radial inner side of the sliding ring 20 each pumping chambers 1 - 8 form or limit, with the rotor 10 rotate and their volumes by rotation of the rotor 10 around its axis of rotation 11 in the slip ring 20 vary cyclically, allowing fluid from an inlet 51 to an outlet 52 is promoted, wherein the volumes of the pumping chambers 1-8 by pivoting the sliding ring 20 around its pivot axis 25 be adjusted.

For this, oil can pass through an opening 53 in one through a radial seal 43 sealed control chamber 9 be introduced to the slip ring 20 against a spring 60 to pivot, with the spring 60 resets the sliding ring when the control oil pressure decreases.

Limits of inlet and outlet 51 . 52 are in 1 . 3 dashed lines for clarity.

Between both axial walls 31 . 32 and these axially opposite axial end faces 21 . 22 of the sliding ring 20 (see. 2 ) is a seal 41 respectively. 42 at least partially in an axial groove 23 respectively. 24 of the sliding ring 20 arranged.

In the execution of 1 . 2 the ring-like seals extend 41 . 42 from AEM respectively along or over the entire circumference of the axial end face 21 respectively. 22 where they are located.

In the execution of 3 . 4 , which, except for the below explained difference in the execution of the 1 . 2 so as to refer to the description thereof and corresponding features are identified by identical reference numerals, the part-ring type seals extend 41 . 42 in the circumferential direction in each case along or over the outlet 52 and over 50% of the circumference of the faces 21 . 22 ,

Although exemplary embodiments have been explained in the foregoing description, it should be understood that a variety of modifications are possible. It should also be noted that the exemplary embodiments are merely examples that are not intended to limit the scope, applications and construction in any way. Rather, the expert is given by the preceding description, a guide for the implementation of at least one exemplary embodiment, with various changes, in particular with regard to the function and arrangement of the components described, can be made without departing from the scope, as it turns out according to the claims and these equivalent combinations of features.

LIST OF REFERENCE NUMBERS

1-8

pumping chamber

9

control chamber

10

rotor

11

axis of rotation

72

wing

13

guide ring

20

sliding ring

21, 22

axial end face

23, 24

axial groove

25

swivel axis

31, 32

axial housing wall

33

housing ring

41

poetry

42

another seal

43

radial seal

51

inlet

52

outlet

53

opening

60

feather

Claims (11)

Adjustable vane pump, in particular for conveying oil, having a rotor (10) which is rotatable about a rotation axis (11) and which is arranged between two axial walls (31, 32) and has a plurality of radially adjustable vanes (12) abutting about a pivot axis (25) pivotable sliding ring (20) of the vane pump that pairs of adjacent wings (12) together with the two axial walls (31, 32), the rotor (10) and the sliding ring (20) pumping chambers (1-8 ) whose volumes vary as the rotor (10) in the slip ring (20) rotates about its axis of rotation (11) to deliver fluid from an inlet (51) to an outlet (52), wherein volumes of the pumping chambers (1 8) by pivoting the sliding ring (20) about its pivot axis (25) are adjustable, wherein at least between one of the axial walls (31, 32) and one of these opposite axial end face (21, 22) of the sliding ring (20) has a seal ( 41, 42) is arranged. An adjustable vane pump according to the preceding claim, wherein a further seal (41, 42) is arranged between the other of the axial walls (31, 32) and a further axial end face (21, 22) of the sliding ring (22) opposite thereto. Adjustable vane pump according to one of the preceding claims, wherein the seal and / or the further seal (41, 42) at least partially in an axial groove (23, 24) of the sliding ring (20) is arranged. Adjustable vane pump according to the preceding claim, wherein the axial groove (23, 24) with the slide ring (20) is urgeformt and / or produced material removal. Variable vane pump according to one of the preceding claims, wherein the seal and / or the further seal (41, 42) at least along 25% and / or at most 75% of a circumference of the axial end face (21, 22) on which it is arranged, and / or at least along the inlet and / or outlet (51, 52) extends. Adjustable vane pump according to one of the preceding claims, wherein the seal and / or the further seal (41, 42) in a non-deformed state has a circular cross-section and / or arranged between the axial wall (21) and the end face (31) seal ( 41) and / or between the other axial wall (22) and the further end face (32) arranged further seal (42) is at least elastically deformed. Adjustable vane pump according to one of the preceding claims, wherein the seal and / or the further seal (41, 42) comprises at least one elastomer, in particular rubber. An adjustable vane pump according to any one of the preceding claims, wherein the rotor (10), the sliding ring (20) and / or at least one of the axial walls (31, 32) comprises metal and / or plastic. Adjustable vane pump according to one of the preceding claims, comprising a control chamber (9) for hydraulically pivoting the sliding ring (20). Internal combustion engine with at least one adjustable vane pump according to one of the preceding claims. Motor vehicle with at least one adjustable vane pump according to one of the preceding claims.

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