Vane pump

Patent metadata

Field	Value
Publication number	US-2021095665-A1
Application number	US-202017025203-A
Country	US
Kind code	A1
Filing date	Sep 18, 2020
Priority date	Sep 26, 2019
Publication date	Apr 1, 2021
Grant date	—

Abstract

A vane pump that includes a first communication passage that extends along an outer periphery of the cam ring and that guides a fluid that has not flowed into the first suction port from the first inflow passage to the second suction port; a second communication passage that extends along the outer periphery of the cam ring on an opposite side of the first communication passage with respect to the rotor and that guides a fluid that has not flowed into the second suction port from the second inflow passage to the first suction port; and a rectifying portion that guides the fluid from the second inflow passage so that the fluid flows into the second suction port along the outer periphery of the cam ring.

First claim

What is claimed is:

1 . A vane pump including a pump housing having a first inflow passage and a second inflow passage into which a fluid respectively flows, a cam ring having an inner peripheral cam surface, a rotor having a plurality of slits formed in a radial shape, a plurality of vanes each disposed in the slits of the rotor so as to be slidable and be in contact with the inner peripheral cam surface of the cam ring, a first suction port in communication with the first inflow passage, and a second suction port in communication with the second inflow passage, the vane pump comprising:
a first communication passage that extends along an outer periphery of the cam ring and that guides a fluid that has not flowed into the first suction port from the first inflow passage to the second suction port; a second communication passage that extends along the outer periphery of the cam ring on an opposite side of the first communication passage with respect to the rotor and that guides a fluid that has not flowed into the second suction port from the second inflow passage to the first suction port; and a rectifying portion that guides the fluid from the second inflow passage so that the fluid flows into the second suction port along the outer periphery of the cam ring.

2 . The vane pump according to claim 1 , wherein the rectifying portion is a protruding portion that is provided on the pump housing so that a fluid from the first communication passage and a fluid from the second inflow passage are merged at an acute angle, on an upstream side of the second suction port.

3 . The vane pump according to claim 1 , wherein the rectifying portion partitions the second inflow passage and the first communication passage on an upstream side of a merging portion of the second inflow passage and the first communication passage, and is tapered toward the second suction port.

4 . The vane pump according to claim 1 , wherein the second inflow passage merges with the first communication passage at a position that is on an opposite side of the first inflow passage with respect to the rotor and that is spaced away from the second suction port along a tangential direction of the outer periphery of the cam ring.

5 . The vane pump according to claim 1 , wherein the vane pump further comprises a second rectifying portion that guides the fluid in the second communication passage to flow into the first suction port along the outer periphery of the cam ring.

6 . The vane pump according to claim 1 , wherein
the vane pump further comprises:
a first discharge port for discharging the fluid sucked from the first suction port; and
a second discharge port for discharging the fluid sucked from the second suction port, and
the first inflow passage is in communication with a fluid storage portion via a strainer, and the fluid drained from a hydraulic control device that regulates a pressure of the fluid from the first and second discharge ports flows into the second inflow passage.

7 . The vane pump according to claim 2 , wherein the rectifying portion partitions the second inflow passage and the first communication passage on an upstream side of a merging portion of the second inflow passage and the first communication passage, and is tapered toward the second suction port.

8 . The vane pump according to claim 2 , wherein the second inflow passage merges with the first communication passage at a position that is on an opposite side of the first inflow passage with respect to the rotor and that is spaced away from the second suction port along a tangential direction of the outer periphery of the cam ring.

9 . The vane pump according to claim 3 , wherein the second inflow passage merges with the first communication passage at a position that is on an opposite side of the first inflow passage with respect to the rotor and that is spaced away from the second suction port along a tangential direction of the outer periphery of the cam ring.

10 . The vane pump according to claim 7 , wherein the second inflow passage merges with the first communication passage at a position that is on an opposite side of the first inflow passage with respect to the rotor and that is spaced away from the second suction port along a tangential direction of the outer periphery of the cam ring.

11 . The vane pump according to claim 2 , wherein the vane pump further comprises a second rectifying portion that guides the fluid in the second communication passage to flow into the first suction port along the outer periphery of the cam ring.

12 . The vane pump according to claim 3 , wherein the vane pump further comprises a second rectifying portion that guides the fluid in the second communication passage to flow into the first suction port along the outer periphery of the cam ring.

13 . The vane pump according to claim 4 , wherein the vane pump further comprises a second rectifying portion that guides the fluid in the second communication passage to flow into the first suction port along the outer periphery of the cam ring.

14 . The vane pump according to claim 9 , wherein the vane pump further comprises a second rectifying portion that guides the fluid in the second communication passage to flow into the first suction port along the outer periphery of the cam ring.

15 . The vane pump according to claim 10 , wherein the vane pump further comprises a second rectifying portion that guides the fluid in the second communication passage to flow into the first suction port along the outer periphery of the cam ring.

16 . The vane pump according to claim 2 , wherein
the vane pump further comprises:
a first discharge port for discharging the fluid sucked from the first suction port; and
a second discharge port for discharging the fluid sucked from the second suction port, and
the first inflow passage is in communication with a fluid storage portion via a strainer, and the fluid drained from a hydraulic control device that regulates a pressure of the fluid from the first and second discharge ports flows into the second inflow passage.

17 . The vane pump according to claim 3 , wherein
the vane pump further comprises:
a first discharge port for discharging the fluid sucked from the first suction port; and
a second discharge port for discharging the fluid sucked from the second suction port, and
the first inflow passage is in communication with a fluid storage portion via a strainer, and the fluid drained from a hydraulic control device that regulates a pressure of the fluid from the first and second discharge ports flows into the second inflow passage.

18 . The vane pump according to claim 4 , wherein
the vane pump further comprises:
a first discharge port for discharging the fluid sucked from the first suction port; and
a second discharge port for discharging the fluid sucked from the second suction port, and
the first inflow passage is in communication with a fluid storage portion via a strainer, and the fluid drained from a hydraulic control device that regulates a pressure of the fluid from the first and second discharge ports flows into the second inflow passage.

19 . The vane pump according to claim 9 , wherein
the vane pump further comprises:
a first discharge port for discharging the fluid sucked from the first suction port; and
a second discharge port for discharging the fluid sucked from the second suction port, and
the first inflow passage is in communication with a fluid storage portion via a strainer, and the fluid drained from a hydraulic co

Assignees

• Aisin Aw Co
• Jtekt Corp

Inventors

• Torii Takahiro
• Kojima Kazuki
• Yoshida Naohito
• Ebihara Tsuyoshi

Classifications

• F04C15/06 Primary

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04C2250/10

  of the inlet or outlet · CPC title

• F04C2/3446 Primary

  the inner and outer member being in contact along more than one line or surface · CPC title