Oil pump with inside engaged gear

A gear machine and internal meshing technology, which is applied in the direction of pumps, mechanical equipment, machines/engines, etc., can solve the problems of reducing the working efficiency of the gearbox, abnormal wear of parts, and high friction coefficient of parts, and achieve good low and high speed characteristics, Improved reliability and service life, and high lubrication efficiency

Inactive Publication Date: 2011-04-20
HUNAN OIL PUMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The oil pump of the existing construction machinery gearbox lubrication system uses a splash type, drip irrigation type or cycloidal rotor pump and other lubrication methods, the lubrication efficiency is low, the lubrication effect is poor, and the friction coefficient of the parts is high, resulting in abnormal parts wear, reducing the efficiency of the gearbox

Method used

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  • Oil pump with inside engaged gear
  • Oil pump with inside engaged gear
  • Oil pump with inside engaged gear

Examples

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Embodiment Construction

[0012] Such as Figure 1-2 As shown, an internal gear oil pump includes a pump body 1, a pump cover 2, an internal gear 3, an external gear 4, and a transmission shaft 5, and the middle part of the transmission shaft 5 and the external gear 4 are interference-connected and installed with the internal gear 3 as a complete set. In the gear hole and the shaft hole of the pump body 1 and the pump cover 2, there is a crescent-shaped separation plate integrally formed with the pump body 1 in the eccentricity space formed by the outer gear hole and the inner gear hole in the inner cavity of the pump body 1. 6. The isolation plate 6 is not only a channel for the isolation and oil delivery of the lubricating oil in the tooth chambers of the internal gear 3 and the external gear 4, but also an isolation device for blocking the oil outlet chamber and the oil inlet chamber and preventing the return of pressure oil. The isolation plate 6. The inner circular arc line and the top circle of t...

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Abstract

The invention relates to an oil pump with an inside engaged gear, which comprises a pump body 1, a pump cover 2, an inside gear 3, an outside gear 4 and a transmission shaft 5. The middle of the transmission shaft 5 is in interference connection with the outside gear 4 and arranged together with the inside gear 3 in the gear hole and axleholes of the pump body 1 and the pump cover 2. A crescent spacer 6, which is not only a channel for separating and transferring lubricating oil in the gear cavities of the inside gear 3 and the outside gear 4, but also an separator for separating the oil outlet cavity from the oil inlet cavity and preventing the pressure oil from backflowing, integrally formed with the pump body 1 is arranged in an eccentricity space formed mutually by the outside and the inside gear holes in the inner cavity of the pump body 1. By adopting the above design, compared with prior art, the invention has the advantages of simple structure, low noise, stable oil transfer, strong self-absorption, high lubricating efficiency, good lubricating effect, good low-high rotating speed characteristic and improves the lubricating efficiency and quality so that the safety, reliability and service life of the oil pump are improved to a great extent.

Description

technical field [0001] The invention relates to an oil pump for a lubricating system of a gear box of construction machinery, in particular to an internal meshing gear oil pump. Background technique [0002] The oil pump of the existing construction machinery gearbox lubrication system uses a splash type, drip irrigation type or cycloidal rotor pump and other lubrication methods, the lubrication efficiency is low, the lubrication effect is poor, and the friction coefficient of the parts is high, resulting in abnormal parts wear, reducing the efficiency of the gearbox. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provide an internal meshing gear oil pump with simple structure, stable oil delivery, high lubrication efficiency and good lubrication effect, so as to improve the lubrication efficiency and lubrication quality, and improve the lubrication efficiency of the lubrication ...

Claims

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Application Information

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IPC IPC(8): F04C2/10
Inventor 许仲秋刘光明徐建明
Owner HUNAN OIL PUMP
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