Pendulum slide pump with at least one communication channel

Abstract

A pendulum slider pump may include an inner rotor connected via a plurality of pendulums to an outer rotor. The pendulums may be mounted on the outer rotor in an articulated manner, and the pendulums may respectively include a pendulum foot guiding in an associated radial groove arranged in the inner rotor. The radial grooves may each include a groove base and two circumferentially spaced groove walls. The outer rotor, the inner rotor and two pendulums adjacent in a circumferential direction may each delimit a chamber. Each pendulum foot together with the associated groove walls and the groove base may delimit a pendulum foot space. At least one pendulum foot space may be connected to the associated chamber via at least one communication channel. The at least one communication channel may open into the pendulum foot space in a region of the groove base.

Claims

1. A pendulum slider pump, comprising: an inner rotor having a rotation axis connected via a plurality of pendulums to an outer rotor; the inner rotor including a plurality of radial grooves configured to receive the plurality of pendulums, the plurality of radial grooves each including a groove base and at least two circumferentially spaced groove walls; the plurality of pendulums mounted on the outer rotor in an articulated manner, the plurality of pendulums respectively including a pendulum foot guided in a corresponding one of the plurality of radial groove; a plurality of chambers each defined by the outer rotor, the inner rotor and two pendulums adjacent in a circumferential direction of the rotation axis; a plurality of pendulum foot spaces defined in the plurality of radial grooves, wherein each of the plurality of pendulum foot spaces is delimited by the pendulum foot of the plurality of pendulums together with the at least two groove walls and the groove base of the plurality of radial grooves; and at least one communication channel provided for each of the plurality of pendulum foot spaces, wherein each communication channel is arranged in the inner rotor to fluidly connect an associated pendulum foot space of the plurality of pendulum foot spaces to a respective chamber of the plurality of chambers, and wherein each communication channel is structured at one end to open into the respective chamber and at another end to open into the associated pendulum foot space in a region of the groove base of each of the plurality of radial grooves.

2. The pendulum slider pump according to claim 1, wherein the at least one communication channel provided for at least one of the plurality of pendulum foot spaces is arranged with respect to a direction of rotation in front of the associated pendulum or after the associated pendulum.

3. The pendulum slider pump according to claim 1, wherein at least one of the plurality of pendulum foot spaces includes at least two communication channels arranged on opposite sides of an associated pendulum with respect to a direction of rotation, and wherein at least one of the at least two communication channels is arranged in front of the associated pendulum with respect to the direction of rotation and connected to one of the plurality of chambers, and at least one other of the at least two communication channels is arranged after the associated pendulum with respect to the direction of rotation and connected to another of the plurality of chambers.

4. The pendulum slider pump according to claim 1, wherein the at least one communication channel provided for at least one of the plurality of pendulum foot spaces includes at least one of a groove defined on a face end of the inner rotor and a bore.

5. The pendulum slider pump according to claim 1, wherein the at least one communication channel provided for at least one of the plurality of pendulum foot spaces is formed via at least one of a primary forming process and eroding.

6. The pendulum slider pump according to claim 1, wherein the at least one communication channel of the associated pendulum foot space for each of the plurality of pendulum foot spaces is fluidly separated from the at least one communication channel of each circumferentially adjacent pendulum foot space with respect to the rotation axis.

7. The pendulum slider pump according to claim 1, wherein each communication channel extends radially between the associated pendulum foot space and the corresponding chamber at least one of linearly and curved.

8. The pendulum slider pump according to claim 1, wherein the pendulum slider pump is an oil pump.

9. A motor vehicle, comprising: at least one pendulum slider pump for supplying a fluid to at least one of an internal combustion engine and a transmission, the at least one pendulum slider pump including: an inner rotor having a rotation axis connected to an outer rotor via a plurality of circumferentially spaced pendulums; a plurality of radial grooves disposed on the inner rotor configured to receive the plurality of pendulums, the plurality of radial grooves each including at least two circumferentially spaced groove walls and a groove base disposed between the at least two groove walls; the plurality of pendulums respectively including a pendulum head mounted on the outer rotor and a pendulum foot arranged in a corresponding one of the plurality of radial grooves; a plurality of chambers each defined by the inner rotor, the outer rotor and two circumferentially adjacent pendulums; a pendulum foot space associated with each of the plurality of radial grooves, wherein each pendulum foot space is delimited by each pendulum foot of the plurality of pendulums together with the at least two groove walls and the groove base of each of the plurality of radial grooves; a plurality of communication channels disposed on the inner rotor, the plurality of communication channels including at least two communication channels provided for the pendulum foot space of at least one associated radial groove of the plurality of radial grooves, wherein the at least two communication channels are disposed on circumferentially opposite sides of the at least one associated radial groove with respect to the rotation axis, and the at least two communication channels are each arranged to fluidly connect the pendulum foot space of the at least one associated radial groove to a respective one of the plurality of chambers; and wherein at least one of the at least two communication channels extends radially from at least one of the at least two groove walls of the at least one associated radial groove to a respective chamber of the plurality of chambers and at least one other of the at least two communication channels extends radially from at least one other of the at least two groove walls of the at least one associated radial groove to another respective chamber of the plurality of chambers, and wherein the at least two communication channels respectively open into the pendulum foot space of the at least one associated radial groove at the groove base.

10. The motor vehicle according to claim 9, wherein the plurality of communication channels further includes at least one communication channel provided for the pendulum foot space of each associated one of the plurality of radial grooves, and wherein each pendulum foot space is fluidly connected to a corresponding one of the plurality of chambers via the at least one communication channel.

11. The motor vehicle according to claim 10, wherein the at least one communication channel provided for the pendulum foot space of each associated one of the plurality of radial grooves is fluidly separated from the at least one communication channel of each circumferentially adjacent pendulum foot space with respect to the rotation axis.

12. The motor vehicle according to claim 9, wherein the at least two communication channels connect the pendulum foot space of the at least one associated radial groove to circumferentially adjacent chambers with respect to the rotation axis separated from one another via a corresponding one of the plurality of pendulums.

13. The motor vehicle according to claim 9, wherein the at least one of the at least two communication channels is arranged in front of the associated pendulum with respect to a direction of rotation and the at least one other of the at least two communication channels is arranged after the associated pendulum with respect to the direction of rotation.

14. The motor vehicle according to claim 9, wherein the plurality of communication channels further includes at least two communication channels provided for the pendulum foot space of each of the plurality of radial grooves.

15. The motor vehicle according to claim 9, wherein the at least two communication channels include at least one of a groove defined on a face end of the inner rotor and a bore hole extending in the inner rotor.

16. The motor vehicle according to claim 9, wherein the at least two communication channels extends at least one of linearly and curved between the at least one associated radial groove and the respective one of the plurality of chambers.

17. The motor vehicle according to claim 9, wherein the at least two communication channels are each structured at one end to open into the respective one of the plurality of chambers and at another end to open into the pendulum foot space of the at least one associated radial groove at the groove base.

18. A pendulum slider pump, comprising: an inner rotor having a rotation axis; an outer rotor; a plurality of pendulums connecting the inner rotor to the outer rotor; the inner rotor including a plurality of radial grooves configured to receive the plurality of pendulums, the plurality of radial grooves each including a groove base and at least two circumferentially spaced groove walls; the plurality of pendulums mounted on the outer rotor in an articulated manner, the plurality of pendulums respectively including a pendulum foot guided in a corresponding one of the plurality of radial grooves; a plurality of chambers each defined by the outer rotor, the inner rotor and two pendulums adjacent in a circumferential direction of the rotation axis; a plurality of pendulum foot spaces defined in the plurality of radial grooves, wherein each pendulum foot space is delimited by the pendulum foot of each of the plurality of pendulums together with the at least two groove walls and the groove base of each of the plurality of radial grooves; an arrangement of communication channels disposed on the inner rotor, the arrangement of communication channels including at least one communication channel provided for each of the plurality of pendulum foot spaces; wherein each communication channel of the arrangement of communication channels is disposed in the inner rotor to fluidly connect an associated pendulum foot space of each of the plurality of pendulum foot spaces to a respective one of the plurality of chambers, and wherein each communication channel of the arrangement of communication channels is structured at one end to open into the respective one of the plurality of chambers and at another end to open into the associated pendulum foot space at the groove base of each of the plurality of radial grooves.

19. The pendulum slider pump according to claim 18, wherein the at least one communication channel of the arrangement of communication channels provided for each of the plurality radial grooves is fluidly separated from the at least one communication channel of a circumferentially adjacent radial groove with respect to the rotation axis.

20. The pendulum slider pump according to claim 18, wherein the arrangement of communication channels further includes at least two communication channels provided for a respective pendulum foot space of at least one radial groove of the plurality of radial grooves, the at least two communication channels disposed on circumferentially opposite sides of the at least one radial groove and each arranged to fluidly connect the respective pendulum foot space to a separate chamber of the plurality of chambers, and wherein the at least two communication channels extend from the separate chambers to the at least one radial groove and open into the respective pendulum foot space at a respective corner defined by a corresponding one of that at least two groove walls and the groove base.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Here it shows, in each case schematically,

(2) FIG. 1 a sectional representation through a pendulum slider pump according to the invention,

(3) FIG. 2 a detail representation of the pendulum slider pump with a curved communication channel,

(4) FIG. 3 a representation as in FIG. 2, however with a linear communication channel.

DETAILED DESCRIPTION

(5) According to FIG. 1, a pendulum slider pump 1 according to the invention, which can for example be designed as an oil pump in a motor vehicle, comprises an inner rotor 2, which via pendulums 3 is connected to an outer rotor 4. Here, the pendulums 3 are mounted on the outer rotor 4 in an articulated manner and with their pendulum foot 5 guided in radial groove 6 in the inner rotor 2. For the articulated mounting the pendulums 3 comprise a pendulum head, which is mounted in a corresponding joint socket on the outer rotor 4. The outer rotor 4, the inner rotor 2 as well as two pendulums 3 adjacent in circumferential direction additionally delimit a chamber 7, which is formed as suction chamber or as pressure chamber depending on the rotary position. Considering the detail representation according to FIGS. 2 and 3 it is clearly evident from these in particular that the pendulum foot 5 together with two groove walls 8 and 8 and a groove base 9 delimit a pendulum foot space 10, which via a communication channel 11 (see FIGS. 1 to 3) is connected to an associated chamber 7, wherein the communication channel 11 opens into the pendulum foot space 10 in the region of the groove base 9.

(6) In the pendulum slider pumps 1 according to FIGS. 1 to 3, each pendulum foot space 10 is connected to the associated chamber 7 via a communication channel, wherein the communication channel 11 depending on the direction of rotation of the inner rotor 2 is arranged in front of or after the associated pendulum 3. Considering, by contrast, FIG. 3, it is evident with the help of the same that two communication channels 11 can also be provided for each pendulum foot space 10 in principle which are arranged in direction of rotation in front of and after the associated pendulum 3. According to FIG. 3, one of the two communication channels 11 is drawn with a continuous line and the other with an interrupted line.

(7) With the communication channels 11 according to the invention, particularly simple and rapid filling or mainly emptying of the pendulum foot spaces 10 is possible, as a result of which undesirable dynamic stagnation pressure built-up within the pendulum foot space 10 can be effectively avoided. The built-up of a dynamic stagnation pressure is to be avoided in particular because the same makes it difficult or obstructs the entry movement of the respective pendulum 3 in the associated groove 6 and because of this influences the eccentricity of the outer rotor 4 relative to the inner rotor 2 in an undesirable manner. In the case of changed or undesirably influenced eccentricity the delivery characteristics of the pendulum slider pump 1 are also influenced. By providing the at least one communication channel 11 on each pendulum foot space 10 the build-up of this undesirable dynamic stagnation pressure can be reliably avoided. By providing the opening of the communication channel 11 in the region of the groove base 9 complete and simple emptying of the pendulum foot space 10 is additionally made possible and in addition to this none of the groove walls 8, 8 is influenced in such a manner that these can no longer assume guiding of the pendulum 3 in the desired manner. In Addition, by providing two communication channels 11 for each pendulum foot space 10 the draining and filling operation can be rendered even more quickly in addition, as a result of which a particularly smooth-operating pendulum slider pump 1 can be created.

(8) Purely theoretically, the communication channel 11 can be formed as a groove and closed off by a face-end lid which is not shown. Alternatively it is also conceivable that the communication channel 11 is formed as a bore, as is shown for example according to FIG. 3. In this case, the communication channel is embodied linearly. Alternatively, the communication channel can also be embodied curved (see FIGS. 1 and 2), wherein in this case the communication channel 11 is produced for example through eroding or during casting by inserting a suitable casting core.

(9) With the at least one communication channel 11 for each pendulum foot space 10 according to the invention, directed filling or emptying of the pendulum foot spaces 10 is made possible, in particular if merely one communication channel 11 for each pendulum foot space 10 is provided. Through the communication channel 11 according to the invention a tendency towards wear can also be reduced since the pendulum slider pump 1 no longer has to battle high dynamic stagnation pressures within the pendulum foot spaces 10. Through the opening of the communication channel 11 in the base of the respective groove 6, i.e. in the region of the groove base 9, no reduction of the frictional area of the pendulum 3 whatsoever occurs in the inner rotor 2, i.e. specifically on the groove walls 8, 8.