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Vane pump

A technology of vane pumps and vanes, which is applied in the direction of pumps, pump components, pump control, etc., and can solve the problems of insufficient back pressure and pressure drop of vanes

Pending Publication Date: 2022-04-12
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, in the vane pump described in JP2018-123818A, when the back pressure introduced into the pump chamber from the plate side pressurization groove and the rotor side pressurization groove rises, it may cause such a problem that the back pressure groove The pressure in the slot is reduced and there is not enough back pressure to push the blade out of the slit
Therefore, depending on the specifications such as the required discharge pressure, the required discharge amount, etc., these measures may not necessarily produce a sufficient erosion suppression effect

Method used

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Examples

Experimental program
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Embodiment

[0021] The following will refer to Figure 1 to Figure 6B Embodiments of the present invention are described. It should be noted that the following embodiments are described as preferred specific examples for carrying out the present invention. There are sections that specifically describe various technical matters that are technically preferable, but the technical scope of the present invention is not limited to such specific examples.

[0022] figure 1 is a configuration diagram showing a schematic configuration of a vane pump according to an embodiment of the present invention. figure 2 is along figure 1 The cross-sectional view of the vane pump taken by the line II-II in . Figure 3A is a plan view showing the rotor, Figure 3B is a perspective view showing part of the rotor together with the blades. Figure 4 It is a plan view showing the side plate and the cam ring of the vane pump. Figure 5A is a perspective view showing side panels, Figure 5B is a perspectiv...

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Abstract

A vane pump (1) comprises a cam ring (3), a rotor (5), a plurality of vanes (6) and a lateral plate (4). The lateral plate (4) has an extending groove. When the first blade (6) passes through the base end portion of the extension groove, the shape of the pump chamber forming surface as viewed from the rotation axis direction of the rotor (5) satisfies the following requirements i) and ii): i) the center line of the groove width of the extension groove is inclined from the radial direction of the rotor (5); and ii) the slit accommodating the second blade has an open end that falls within a band-shaped range obtained by extending the groove width of the base end portion of the extension groove along a virtual extension line.

Description

technical field [0001] The invention relates to a vane pump. Background technique [0002] A vane pump is used for the operation of a transmission such as a vehicle, wherein the vane pump is configured to discharge oil sucked into an inlet port by a rotor rotating inside a rotor chamber from a discharge port. The rotor is configured such that the vanes are accommodated in corresponding slits formed in a radial manner. In such a vane pump, when fine air bubbles contained in oil are crushed flat due to pressure increase in the oil discharge step, erosion (cavitation damage) is caused by the impact of this crushing. In view of this, various measures against this erosion have been proposed. [0003] In the vane pump described in Japanese Unexamined Patent Application Publication No. 2019-210881 (JP2019-210881A), the vanes are provided with recesses that are recessed in the direction of the plate thickness of the vanes so that the volume of air bubbles in the pump chamber is th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/344F04C15/00F16H57/04
CPCF04C2/3446F01C21/108F01C21/0836F04C2210/206F04C2250/30F04C2240/20F04C2/344F04C2240/801F04C2270/165
Inventor 高桥祐司
Owner JTEKT CORP