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Internal gear rotary pump or motor

An internal gear pump, internal gear technology, applied in the direction of intermeshing engines, pumps, rotary piston pumps, etc., can solve problems such as large leakage, avoid inherent gaps, have a good degree of sealing, and compensate for tooth tip gaps. Effect

Inactive Publication Date: 2007-12-05
ZHENJIANG DALI HYDRAULIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the defect of excessive leakage caused by the radial and axial clearance of the gear pair in the internal meshing gear pump or motor without wedge-shaped blocks, and to provide a small internal leakage, high volumetric efficiency, and use Long life internal gear pump or motor

Method used

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  • Internal gear rotary pump or motor

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Embodiment Construction

[0030] The present invention will now be described in further detail in conjunction with the accompanying drawings and embodiments.

[0031] Please refer to FIG. 3 and FIG. 4 for structural diagrams of the present invention, which illustrate that the internal meshing gear pump includes a housing part 10 , an internal meshing gear pair 20 and a flexible side plate 30 .

[0032] The housing part 10 consists of a front housing part 11 and a rear housing part 12 . Please refer to FIG. 5 for an exploded structural view of the front housing part 11 , the front housing part 11 includes a front housing 110 , an input shaft 111 and a front bearing 112 . The front housing 110 has a central hole 1101 and an inner end surface 1102 perpendicular to the axis of the central hole 1101; the input shaft 111 penetrates the central hole 1101 and is mounted on the front housing 110 through the front bearing 112. In the central hole 1101; please refer to Fig. 8 for the longitudinal sectional view ...

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PUM

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Abstract

The invention discloses an inner meshing gear or motor which contain an inner meshing gear makes up with annular gear and a rotor. The annular gear has arc conjugate inner tooth. The rotor has arc teeth type outer tooth which makes up with cylindrical rolling needle and rolling needle groove sets on rotor body. The inner part of rolling needle sets in the groove and outer part meshing with inner tooth of annular gear. The rolling needle can rotate free in the groove and move trace at radial of rotor. Flexible side plate which can deform laterally sets on side of inner meshing gear. It can prevent inner leakage and release wear by deform the meshing contact of gear tooth to rolling touch. The inner meshing gear or motor has low inner leakage, high volumetric efficiency and long service life; it can be used in several of high and low pressure hydraulic system.

Description

Technical field: [0001] The invention relates to a rotating liquid displacement machine, in particular to an internal meshing gear pump or motor for a hydraulic transmission system. Background technique: [0002] All hydraulic systems are inseparable from hydraulic components, and gear pumps or motors are one of the important hydraulic components. Compared with external gear pumps, internal gear pumps have the advantages of compact structure, light weight, small flow and pressure pulsation, low noise, and insensitivity to medium pollution, so they have developed rapidly in recent years. [0003] The basic structure of a traditional internal gear pump is generally composed of a housing and an internal gear pair accommodated in the housing. The ring gear is in the housing and can rotate freely in it, and there is a certain eccentricity between the axis center of the rotor and the shaft center of the ring gear. Usually, the power input shaft of the pump directly drives the ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/10F03C2/00F01C1/10
Inventor 王晓忻
Owner ZHENJIANG DALI HYDRAULIC MOTOR
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