Two-stage internal gear pump

A technology of internal gear pump and pump casing, applied in the direction of pump, pump components, pump control, etc., can solve the problem that the gear pump cannot meet the working requirements of the high-pressure hydraulic system, and achieves the improvement of gap leakage, high pump hydraulic pressure and working conditions. Efficiency and small size

Inactive Publication Date: 2017-01-11
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of its own structure and working mechanism, the current gear pump still cannot meet the working requirements of 35MPa in the high-pressure hydraulic system

Method used

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0026] The two-stage internal gear pump shown in the figure includes an outer rotor 7, an intermediate rotor 8 and an inner rotor 9 closed by a sealing member M, and also includes a high-pressure sealing block 10 and a low-pressure sealing block 11, an outer rotor 7, an intermediate rotor 8 and the inner rotor 9 are sequentially meshed from outside to inside, the inner rotor 9 is connected to the power input device, and the high-pressure sealing block 10 and the sealing member M separate the inner rotor 9 and the intermediate rotor 8 into a closed secondary low-pressure area 24 and Secondary high-pressure zone 25, the low-pressure sealing block 11 and sealing member M separate the intermediate rotor 8 and the outer rotor 7 into a closed primary low-pressure zone 23 and a primary high-pressure zone 22, wherein the primary low-pressure zone 23...

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Abstract

The invention discloses a two-stage internal gear pump. The two-stage internal gear pump comprises an outer rotor, a middle rotor and an inner rotor which are sealed through sealing components, and further comprises a high-pressure sealing block and a low-pressure sealing block; the outer rotor, the middle rotor and the inner rotor are sequentially sealed from outside to inside, the inner rotor is connected with power input equipment, the high-pressure sealing block and the corresponding sealing component separate the inner rotor and the middle rotor into a closed second-stage low-pressure area and a closed second-stage high-pressure area, and the low-pressure sealing block and the corresponding sealing component separate the middle rotor and the outer rotor into a closed first-stage low-pressure area and a closed first-stage high-pressure area; and the first-stage low-pressure area is communicated with a liquid inlet, the second-stage high-pressure area is communicated with a liquid outlet, and the second-stage low-pressure area is communicated with the first-stage high-pressure area. Compared with a common gear pump, the two-stage internal gear pump has the function of secondary pressurizing, the higher liquid pumping pressure and working efficiency can be achieved, and the working requirement of a high pressure hydraulic system is met.

Description

technical field [0001] The invention relates to a liquid pumping device of a high-pressure hydraulic system, in particular to a two-stage internal meshing gear pump with two-stage pressurization. [0002] technical background [0003] As an important aspect of modern hydraulic technology, hydraulic transmission has a wide range of applications. In the hydraulic transmission system, the hydraulic pump converts the mechanical energy output by the power machine into the pressure energy of the flowing liquid, drives the hydraulic actuator in the system, and completes various output actions. The hydraulic pump is the power source of the hydraulic system. If there is no energy conversion link of the hydraulic pump, the actuator will not work. Among all kinds of hydraulic pumps, internal gear pumps are widely used in machine tools, aviation, ships and various engineering machinery because of their stable operation, low noise, small trapped oil, compact structure and small volume. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/10F04C15/00
CPCF04C2/101F04C15/00F04C15/0003F04C2240/20F04C2270/125F04C2270/135
Inventor 蒋劲应锐邱艳军李燕辉富友孙强强刘来全郭佳栋
Owner WUHAN UNIV
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