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Rectangular sealing strip and variable displacement vane pump

A sealing strip and vane pump technology, which is applied in the field of oil pumps, can solve problems such as unexpected variables, advanced variables, and inaccurate oil pump variables.

Pending Publication Date: 2021-05-18
HUNAN OIL PUMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on the above premise, the high-pressure oil at the oil outlet of the oil pump can easily leak into the variable control chamber through the end face clearance of the variable slider, causing extra pressure in the variable control chamber, which will lead to inaccurate oil pump variables and irregularities. Phenomena such as expected variables, or advance variables

Method used

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  • Rectangular sealing strip and variable displacement vane pump
  • Rectangular sealing strip and variable displacement vane pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 The shown rectangular sealing strip is used to be installed in the seal installation groove of the variable slider of the vane pump. The specific installation position is as follows: figure 2 As shown, notches 61 are provided on the same side of the upper and lower ends of the rectangular sealing strip.

Embodiment 2

[0023] Such as figure 1 , 2 As shown, a variable displacement vane pump includes a pump body 1, a rotating pin 2, a rotor 3, a variable slider 4, a variable spring 5, a rectangular sealing strip 6, and a sealing support 7. The pump body 1 and the variable sliding A variable control cavity 8 is provided between the blocks 4; the variable slider 4 is provided with a spring pressure block and a seal installation groove, and the seal support 7 and the rectangular sealing strip 6 are installed in the seal installation groove of the variable slider 4; the seal support The part 7 is a round rubber rod; the upper and lower ends of the rectangular sealing strip 6 are provided with notches 61 on the outward side.

[0024] Since the ends of the upper and lower ends of the rectangular sealing strip 6 are provided with gaps 61, the excess pressure oil in the variable control chamber 8 can pass through the gaps 61 and flow into the oil inlet chamber of the oil pump through the gap between ...

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Abstract

The invention provides a rectangular sealing strip which is used for being installed in a sealing piece installation groove of a vane pump variable sliding block. A notch is formed in the end portion of at least one end of the rectangular sealing strip. The invention further provides a variable displacement vane pump which comprises a pump body, a rotating pin, a rotor, a variable sliding block, a variable spring, a rectangular sealing strip and a sealing supporting piece. A variable control cavity is formed between the pump body and the variable sliding block, and the variable sliding block is provided with a spring pressing block and the sealing piece installation groove. The sealing supporting piece and the rectangular sealing strip are installed in the sealing piece installation groove of the variable sliding block, and a notch is formed in the end portion of at least one end of the rectangular sealing strip. Due to the fact that the notches are formed in the end portions of the upper end and the lower end of the rectangular sealing strip, extra pressure oil leaking into the variable control cavity can flow into the oil inlet cavity of the oil pump through the notches of the rectangular sealing strip, the influence of the pressure oil leaking from a end face gap on the variable control cavity can be eliminated, and therefore variable accuracy of the oil pump is guaranteed.

Description

technical field [0001] The invention relates to the technical field of oil pumps, in particular to a rectangular sealing strip and a variable displacement vane pump. Background technique [0002] The existing variable displacement vane pump is equipped with a variable control chamber, which usually introduces pressure oil from the main oil passage for feedback, and the oil in the main oil passage has passed through machine cooling and filter, there will be The pressure decays, so the oil pressure in the variable control chamber will be lower than the oil pressure at the oil pump outlet. [0003] Based on the above premise, the high-pressure oil at the oil outlet of the oil pump can easily leak into the variable control chamber through the end face clearance of the variable slider, causing extra pressure in the variable control chamber, which will lead to inaccurate oil pump variables and irregularities. Phenomena such as expected variables, or advance variables. Contents ...

Claims

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Application Information

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IPC IPC(8): F04C15/00F04C2/344F16N13/20
CPCF04C2/344F04C15/0003F16N13/20
Inventor 刘铁飞许仲秋刘光明佘笑梅
Owner HUNAN OIL PUMP
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