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Externally-engaged spherical gear pump

An external meshing and spherical tooth technology, applied in the field of hydraulic pumps, can solve the problems of unsatisfactory flow pulsation performance, small inter-tooth load, and low flow pulsation of involute gear pumps, so as to achieve small inter-tooth load and high gear meshing degree. , the effect of large output flow

Inactive Publication Date: 2017-07-28
CHANGZHOU UNIV
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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 solve the problems of unsatisfactory flow pulsation performance, abnormal gear wear and premature scrapping of existing involute gear pumps, and to provide an external meshing spherical tooth pump with small inter-gear load and low flow pulsation

Method used

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Embodiment Construction

[0017] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0018] figure 1 with figure 2 One embodiment of the present invention is shown. The external meshing ball-tooth pump of the present invention consists of a pump body 1, a male gear 2, a female gear 3, a driven shaft 4, a driving shaft 5, a rear pump cover 6, a positioning pin 7, a bearing cover 8, a front pump cover 9, etc. composition. The main points of the structure are: the tooth profile of the male gear 2 is a convex spherical tooth, the tooth profile of the female gear 3 is a concave spherical tooth that meshes with the convex spherical tooth of the male gear 2, and the driving shaft 5 passes through the male The toothed gear 2 drives the male gear 2 to rotate through a key connection, and the driven shaft 4 passes through the female gear 3.

[0019] The outer shape of the pump body 1 is elliptical. The male gear 2 and the female gear 3 mesh wi...

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Abstract

The invention relates to an externally-engaged spherical gear pump which comprises a pump body (1), a male-tooth gear (2), a female-tooth gear (3), a driven shaft (4), a driving shaft (5), a rear pump cover (6), positioning pins (7), a bearing cover (8) and a front pump cover (9). The tooth shape of the male-tooth gear (2) is a convex spherical gear, and the tooth shape of the female-tooth gear (3) is a concave spherical gear engaged with the convex spherical gear of the male-tooth gear (2). The work tooth face of the male-tooth gear and the work tooth face of the female-tooth gear are a spherical convex-tooth gear profile and a spherical concave-tooth gear profile correspondingly, the volume change quantity of an oil absorption cavity is large, the circular arc radius of the convex-tooth gear profile is equal to that of the concave-tooth gear profile, therefore the gear tooth contact strength is high, the inter-tooth load is small, the output flow is large, flowing the pulse is small, noise is low, and steadiness of pump operation and the service life are both superior to those of a traditional gear pump adopting an involute gear profile.

Description

Technical field [0001] The invention relates to the technical field of hydraulic pumps, in particular to an external meshing spherical gear pump. Background technique [0002] The gear pump achieves the effect of sucking and pressing oil by generating a volume change through a pair of gears. Traditional gear pumps all use involute gears. Because the position of the involute gear meshing point changes instantly, the load between teeth is large and the output flow pulsation is large during operation. At this stage, involute gear pumps are developing in the direction of high speed and high pressure, but the problems brought about are increased load between teeth, increased gear wear, and shortened gear life; flow pulsation reduces the involute gear pump’s Output flow stability. [0003] In order to improve the performance of the gear pump and prolong its service life, researchers have used cascaded gears to reduce flow pulsation, and improve the wear resistance by processing the sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/18F04C15/00
CPCF04C2/18F04C15/00F04C2240/20
Inventor 祝海林沈一帆
Owner CHANGZHOU UNIV
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