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Variable displacement vane pump

A vane pump, capacity technology, applied in the direction of rotary piston pumps, pumps, pump components, etc., can solve the problem of sliding wear of the drive shaft, and achieve the effect of suppressing insufficient lubrication

Inactive Publication Date: 2015-09-16
HITACHI AUTOMOTIVE SYST STEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, according to the above structure, during the suction action, due to the negative pressure generated by the increase in the volume of the pump chamber accompanying the rotation of the rotor, the working fluid used for bearing lubrication is sucked up in the bearing portion, which may result in a Defects such as sliding wear of the drive shaft due to insufficient lubrication of the shaft bearing

Method used

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  • Variable displacement vane pump

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach 〕

[0089] Figure 1 to Figure 6 The first embodiment of the variable displacement oil pump of the present invention is shown. The variable displacement vane pump (hereinafter simply referred to as "pump") is as follows: Figure 1 ~ Figure 3 As shown, there is a substantially cylindrical pump casing 11 having a pump element housing portion 10 inside; a drive shaft 12 is inserted and supported in the axial direction of the pump casing 11, and is based on a driving force transmitted from an engine not shown in the figure. is driven to rotate; the annular adapter ring 13 is fitted to the peripheral wall of the pump element housing portion 10; the annular cam ring 14 is rotated relative to the axis of the drive shaft 12 (rotation of the rotor 21 described later). Center) Q can be accommodated eccentrically on the inner peripheral side of the adapter ring 13; the pump element is accommodated and arranged on the inner peripheral side of the cam ring 14, and has a drive shaft 12, through...

no. 2 Embodiment approach 〕

[0118] Figure 8 The second embodiment of the variable displacement vane pump according to the present invention is different from the first embodiment in that the partition wall 43 is deleted, and the first seal groove 41 and the second seal groove are separated. 42 is constituted as a continuous seal groove 45, and constitutes the first seal member S1 and the second seal member S2 as an integral seal member S0.

[0119] In this way, in this embodiment, since the above-mentioned continuous seal groove 45 is formed, compared with the first embodiment in which the above-mentioned partition wall 43 is provided, the space occupied by the partition wall 43 can be omitted. As a result, the opening area of ​​the first suction port 25a can be enlarged, contributing to the improvement of pump suction efficiency.

[0120] Furthermore, since the first and second seal members S1 and S2, which are constituted by independent members in the first embodiment, are constituted by the integral...

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PUM

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Abstract

A variable displacement vane pump includes a pump housing, a drive shaft supported in the pump housing, a rotor rotated by the drive shaft, a plurality of vanes mounted to the rotor, a cam ring disposed movably around the pump element and a pressure plate arranged facing the rotor and the cam ring. The pressure plate has formed therein a discharge hole and a drive shaft insertion hole. The pump housing has formed therein a suction hole, a high-pressure chamber and a low-pressure chamber. The variable displacement vane pump further includes a first seal member disposed on a pressure receiving surface of the pressure plate so as to separate the drive shaft insertion hole from the high-pressure chamber and a second seal member disposed on the pressure receiving surface of the pressure plate so as to separate the low-pressure chamber from the high-pressure chamber and the drive shaft insertion hole.

Description

technical field [0001] The present invention relates to a variable capacity vane pump suitable for a hydraulic supply source of an automatic transmission of an automobile, for example. Background technique [0002] As a conventional variable displacement vane pump applied to an automatic transmission of an automobile, an invention described in, for example, the following Patent Document 1 is known. [0003] This variable capacity vane pump has: a cylindrical pump casing with a pump element housing part inside; a drive shaft inserted through and supported on the pump casing; a rotor driven by the drive shaft; The plurality of vanes on the outer peripheral portion of the rotor; the cam ring is housed on the outer peripheral side of the rotor so as to be eccentrically movable with respect to the axis of the drive shaft, and partitions a plurality of pump chambers along the circumferential direction together with the rotor and the plurality of vanes. The discharge flow rate is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/344F04C15/00
CPCF04C14/223F04C15/0046F01C21/02F04C2/3446F04C15/0023F04C2/3441F04C14/226F04C2240/52
Inventor 今永广喜内田由纪雄
Owner HITACHI AUTOMOTIVE SYST STEERING