Variable displacement rotor oil pump

A technology of rotor oil pump and displacement, applied in the direction of lubricating pumps, mechanical equipment, engine components, etc., can solve the problems of engine power loss, increase oil volume, etc., and achieve the effect of simple structure

Inactive Publication Date: 2012-07-04
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this structure can adjust the displacement of the oil pump, but at high speed, the oil pressure of the oil pump increases and the oil volume increases, and the pressure relie

Method used

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  • Variable displacement rotor oil pump
  • Variable displacement rotor oil pump
  • Variable displacement rotor oil pump

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0029] Please refer to figure 1 , The variable displacement rotor oil pump 100 of the preferred embodiment of the present invention includes a pressure relief valve module 10, a pump cover 20, a displacement adjustment structure 30, a driving gear 311, a middle cover 40, a pump housing 50, and a bottom end cover The plate 60 and the oil inlet valve module 70.

[0030] The pressure relief valve module 10 includes a screw plug 12, a return spring 14 and a one-way valve 16.

[0031] The pump cover 20 has a bottom surface 21 and a top surface 29, please refer to figure 2 , The bottom surface 21 is recessed to form an inner cavity 22. An upper high pressure oil area 24 and an upper low pressure oil area 25 are provided in the inner cavity 22. The pump cover 20 is provided with a pressure relief hole 26 on the side of the upper low pressure oil area 25. The screw plug 12, the return spring 14 and the one-way valve 16 are installed in the pressure relief hole 26. A number of first pos...

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PUM

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Abstract

The invention relates to a variable displacement rotor oil pump which comprises a pump cover, a pump case, a displacement adjusting structure and an intermediate cover plate, wherein the displacement adjusting structure comprises a centrifugal adjusting mechanism, a first inner rotor, a first outer rotor, a second inner rotor, a second outer rotor and a rotating shaft; an upper oil cavity is formed between the pump cover and the intermediate cover plate; the first inner rotor and the first outer rotor are matched with each other and are positioned in the upper oil cavity; a lower oil cavity is formed between the intermediate cover plate and the pump case; the second inner rotor and the second outer rotor are matched with each other and are positioned in the lower oil cavity; the lower oil cavity is divided to form a lower high-pressure oil area and a lower low-pressure oil area; the centrifugal adjusting mechanism, the first inner rotor and the second inner rotor rotate along with the rotating shaft; when the rotating speed of the rotating shaft is lower than the preset value, the oil in the lower high-pressure oil area is separated from the oil in the lower low-pressure oil area; and when the rotating speed of the rotating shaft is higher than the preset value, the rotating shaft and the second inner rotor are driven to rise upwards by the centrifugal force of the centrifugal adjusting mechanism, and the oil in the lower high-pressure oil area is communicated with the oil in the lower low-pressure oil area.

Description

technical field [0001] The invention relates to a rotor oil pump, in particular to a variable displacement rotor oil pump. Background technique [0002] At present, the oil pumps used in automotive internal combustion engines are generally fixed-displacement oil pumps, and the oil flow is proportional to the engine speed. The flow of this type of oil pump increases continuously with the increase of the engine speed. For a specific internal combustion engine, designers usually choose a large-displacement oil pump under the worst working conditions, that is, the oil pump corresponds to the low engine speed after determining the displacement, so that as the engine speed increases, the oil pump will The displacement of the oil pump increases accordingly. However, the lubrication of some parts of the engine does not need to increase the lubricating oil all the time as the engine speed increases. Doing so will increase the oil pressure in the engine oil passage and increase the o...

Claims

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Application Information

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IPC IPC(8): F16N13/20F01M1/02
Inventor 佟宇由毅沈源袁爽赵福全
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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