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a gear pump

A gear pump and gear technology, applied in the direction of pumps, pump components, rotary piston pumps, etc., can solve the problems of reducing the volumetric efficiency of the gear pump, the volume loss of the gear pump, and reducing the performance of the gear pump.

Active Publication Date: 2021-11-23
HENAN AEROSPACE HYDRAULIC & PNEUMATIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a gear pump to solve the technical problems in the prior art that the volume loss of the gear pump is caused by the leakage of the end face of the gear pump, the volumetric efficiency of the gear pump is reduced, and the performance of the gear pump is reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0024] Such as Figure 1 to Figure 3 As shown, the gear pump includes a pump casing. Two gears are arranged in the pump casing. The two gears are the driving gear 1 and the driven gear 2 that mesh with each other to form a gear pair. The pump casing has a low-pressure chamber 6, a high-pressure chamber 5 and a The alveolar chamber 7 surrounded by the gear teeth and the pump casing, the high-pressure chamber 5 and the low-pressure chamber 6 are on both sides of the plane where the two gear axes are located, the high-pressure chamber 5 communicates with the outlet of the gear pump, and the low-pressure chamber 6 communicates with the gear pump outlet. import connections.

[0025] Such as figure 1 and figure 2 As shown, the gear pump also includes a gear shaft. The gear shaft includes a driving shaft 8 and a driven shaft 9. The driving shaft 8 and the driving gear 1 are assembled and arranged coaxially in the circumferential direction, and the driven shaft 9 and the driven gea...

specific Embodiment 2

[0038] The difference between it and Embodiment 1 is that only the high-pressure chamber diversion groove whose outer end communicates with the high-pressure chamber is provided on the gear mating surface, and the low-pressure chamber diversion groove and the alveolar cavity diversion groove are not provided, and the high-pressure chamber diversion groove is set The end face leakage of the gear pump can be reduced, the volume loss of the gear pump can be reduced, and the volumetric efficiency of the gear pump can be increased. Moreover, the gear pump with this structure can simplify the processing and manufacture of the gear pump, reduce the processing cost, and improve the processing efficiency.

specific Embodiment 3

[0040] The difference from Embodiment 1 is that only the high-pressure chamber diversion groove whose outer end communicates with the high-pressure chamber and the alveolar chamber diversion groove whose outer end communicates with the alveolar cavity are provided on the gear mating surface, and no low-pressure chamber diversion groove is provided. , the setting of the high-pressure chamber guide groove and the alveolar chamber guide groove can reduce the end face leakage of the gear pump, help reduce the volume loss of the gear pump, and increase the volumetric efficiency of the gear pump, and the gear pump with this structure can also Simplify the processing and manufacturing of the gear pump, reduce the processing cost and improve the processing efficiency.

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Abstract

The present invention relates to gear pumps. The gear pump includes a pump casing on which a gear mating surface is provided. The gear mating surface includes an outer ring part for matching with the gear tooth clearance and an inner ring part located in the outer ring part; The cavity diversion groove, the high-pressure cavity diversion groove has the inner end of the high-pressure chamber diversion groove located on the inner ring part and the outer end of the high-pressure chamber diversion groove located on the outer ring part or outside the outer ring part; in the direction of rotation of the corresponding gear , the inner end of the diversion groove of the high-pressure chamber is behind the outer end of the diversion groove of the high-pressure chamber, or the outer end of the diversion groove of the high-pressure chamber is located radially outside the inner end of the diversion groove of the high-pressure chamber; the outer end of the diversion groove of the high-pressure chamber communicates with the high-pressure chamber , to export the oil in the gear end face clearance to the high pressure chamber when the gear rotates to reduce the end face leakage, reduce the volume loss of the gear pump, and improve the performance of the gear pump, and the setting of the high pressure chamber diversion groove can also reduce The friction between the gear and the mating surface of the gear reduces the loss of the input power of the gear pump.

Description

technical field [0001] The invention relates to a gear pump. Background technique [0002] A gear pump generally includes an upper cover, a pump body, an end cover, a driving shaft, a driving gear and a driven gear, etc. During the working process of the gear pump, when the main and driven gears are meshed and driven, the teeth of the low-pressure oil suction chamber are separated, and the volume of the oil suction chamber becomes larger, creating a certain vacuum space. Enter the oil suction chamber through the oil inlet, and then the oil in the oil suction chamber is brought to the high-pressure oil pressure chamber by the rotating gear, the teeth of the main and driven gears on the side of the oil pressure chamber mesh, and the volume in the oil suction chamber is compressed. The oil is squeezed to the oil outlet to complete the whole pumping process. [0003] Since the high-pressure oil chamber and the low-pressure oil suction chamber in the gear pump are not completel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C2/14F04C29/00
CPCF04C2/14F04C29/00F04C2240/30
Inventor 赵洪锋赵亮张凯韩志英杨凯王向前韩正杰陈荣尚白祥志邵振振
Owner HENAN AEROSPACE HYDRAULIC & PNEUMATIC TECH