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Filter screen assembly and oil pump

A technology of oil pump and filter screen, which is applied in the field of oil pump, can solve the problems of insensitive feedback of the feedback cavity, stagnation, and untimely response of the variable displacement of the oil pump, etc., and achieves the effect of being easy to fix and preventing rubber deformation

Pending Publication Date: 2019-03-22
HUNAN OIL PUMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the feedback chamber is located between the inner wall of the rotor chamber and the variable slider, and it is a long and narrow chamber, and there are inevitably particles such as impurities in the oil, when the impurities in the oil enter the feedback chamber, it will cause Abnormal wear or even stagnation between the variable slider and the inner wall of the rotor chamber, resulting in insensitive feedback from the feedback chamber and untimely response of the variable displacement of the oil pump

Method used

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  • Filter screen assembly and oil pump
  • Filter screen assembly and oil pump
  • Filter screen assembly and oil pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 , 2 A filter screen assembly shown is used for an oil pump, comprising a metal casing 10 and a rubber ring 20 located in the metal casing 10, the hollow part of the rubber ring 20 is equipped with a filter screen 21, and the metal casing 10 is composed of a Circular bottom plate 11 and an annular wall 12 constitute, and described circular bottom plate 11 is provided with through hole, and described circular bottom plate 11 is positioned at one end of described annular wall 12, and the other end of described annular wall 12 is provided with inward Flange structure13.

Embodiment 2

[0022] Such as image 3 As shown, an oil pump includes a pump casing 30, on which a feedback oil passage is provided, and the filter screen assembly in Embodiment 1 is installed at the inlet of the feedback oil passage. As a preferred solution, the metal shell of the filter screen assembly is installed at the inlet of the feedback oil channel of the pump casing 30 in an interference fit manner.

[0023] Since the filter screen assembly includes a metal shell and a rubber ring inside, this structure can not only prevent rubber deformation, but also facilitate fixing, and can be installed on the pump casing in an interference fit manner. Install the filter screen assembly of this structure on the machine At the inlet of the feedback oil channel of the oil pump, the particles and impurities in the oil can be prevented from entering the feedback chamber.

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Abstract

The invention provides a filter screen assembly. The filter screen assembly is used for an oil pump and comprises a metal outer shell and a rubber ring located in the metal outer shell, a filter screen is mounted in a hollow part of the rubber ring, the metal outer shell is composed of a round bottom plate and an annular wall, a through hole is formed in the round bottom plate, the round bottom plate is located at one end of the annular wall, and an inward flanging structure is arranged at the other end of the annular wall. The invention further provides the oil pump. The oil pump comprises apump shell, a feedback oil duct is arranged on the pump shell, and the filter screen assembly is mounted at an inlet of the feedback oil duct. The filter screen assembly and the oil pump have the beneficial effects that the filter screen assembly comprises the metal outer shell and the inside rubber ring, the structure can prevent rubber from deforming, is convenient to fix, can be mounted on thepump shell in an interference fit mode, the filter screen assembly with the structure is mounted at the inlet of the feedback oil duct of the oil pump, and particle impurities in engine oil can be prevented from entering a feedback cavity.

Description

technical field [0001] The invention relates to an engine lubricating system, in particular to a filter screen assembly and an oil pump using the filter screen assembly. Background technique [0002] For the vane oil pump with variable displacement, it usually includes a feedback chamber and a feedback oil passage. The feedback chamber is a narrow and long cavity located between the inner wall of the rotor chamber and the variable slider. The feedback oil passage is arranged on the pump casing. It is used to introduce the pressure oil from the pump outlet or the main oil passage into the feedback chamber, and the oil pressure in the feedback chamber acts on the variable slider. When the oil pressure in the feedback chamber is large enough, it can overcome the elastic force of the variable spring and push the variable slider. The block moves, otherwise, the variable slide block returns under the elastic force of the variable spring, and the change of the position of the varia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01M11/03
CPCF01M11/03F01M2011/035
Inventor 许仲秋康淞宣
Owner HUNAN OIL PUMP