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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  • 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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  • Externally-engaged spherical gear pump

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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 meshed spherical gear pump, which comprises a pump body (1), a male gear (2), a female gear (3), a driven shaft (4), a driving shaft (5), and a rear pump cover ( 6), positioning pin (7), bearing cover (8), front pump cover (9); the tooth shape of the male tooth gear (2) is a convex spherical tooth, and the tooth shape of the female tooth gear (3) is the same as that of the male tooth The convex spherical teeth of the gear (2) are concave spherical teeth meshed with each other; the working tooth surfaces of the male gear and the female gear of the present invention are spherical convex tooth profiles and concave tooth corridors, and the volume change of the oil suction chamber is large , and the arc radius of the convex tooth profile and the concave tooth corridor are equal, therefore, the contact strength of the teeth is high, the load between the teeth is small, the output flow is large, the flow pulsation is small, the noise is low, and the stability and service life of the pump are average. Outperforms conventional gear pumps with involute tooth profiles.

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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