High-pressure gear pump bearing with sealing structure

A gear pump with sealing technology, which is applied in the direction of rotating bearings, bearings, bearing components, etc., can solve the problems of large leakage and affect the oil supply efficiency of the gear pump, and achieve the effect of avoiding gap leakage and improving oil supply efficiency

Inactive Publication Date: 2017-02-22
BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

Due to the existence of dimensional and shape tolerances in the processing of parts, in order to ensure the normal installation of the bearing in the housing cavity, a certain gap must be ensured between the outer diameter of the bearing and the inner diameter of the housing cavity, so that fuel leakage is inevitable, especially in Under the condition of high outlet pressure, the leakage here is relatively large, which affects the oil supply efficiency of the gear pump

Method used

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  • High-pressure gear pump bearing with sealing structure
  • High-pressure gear pump bearing with sealing structure
  • High-pressure gear pump bearing with sealing structure

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Embodiment Construction

[0016] The present invention will be described in further detail below. Referring to the accompanying drawings, a high-pressure gear pump with a sealed structure is composed of a high-pressure gear pump bearing 3, a thrust bearing 6, a floating bearing 7, a housing 1 and gears. An annular sealing ring groove is designed on the high pressure gear pump bearing 3 and the thrust bearing 6, and the rectangular sealing ring 2 is installed in the sealing ring groove. In the gear pump cavity of the casing 1, a high pressure gear pump bearing 3 is installed at one end of the high pressure gear, and a floating bearing 7 and a thrust bearing 6 are installed at the other end. On the high-pressure gear pump bearing 3, the floating bearing 7, and the thrust bearing 6, an oil through hole is designed, and the oil through hole guides the high-pressure fuel oil at the outlet of the gear pump on the bearing end face to the bottom of the rectangular sealing ring 2 installation groove on the bear...

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Abstract

The invention relates to a high-pressure gear pump bearing with a sealing structure; and the high-pressure gear pump bearing is used for reducing the fuel leakage after pumping when a high-pressure gear pump works, so that the oil supply efficiency of the gear pump is improved. Because of existence of the part machining dimensional tolerance and geometric tolerance, in order to guarantee normal installation of the bearing in a shell cavity, a certain gap is guaranteed between the outer diameter of the bearing and the inner diameter of the shell cavity, so that the fuel leakage is inevitable. The high-pressure gear pump bearing with the sealing structure is provided with a peripheral sealing groove in the outer surface; and an oil passing hole is formed in the end surface bonded with a gear, and is communicated with the sealing groove. High-pressure radial pressure is applied to a rectangular sealing ring in the sealing groove through high-pressure oil to realize peripheral seal. The rectangular-section sealing ring is added on the bearing to guarantee sealing between the bearing and a shell to prevent leakage of the high-pressure fuel in an outlet of the gear pump from the gap between the bearing and the shell.

Description

technical field [0001] The invention relates to a high-pressure gear pump bearing with a sealing structure, which is used for reducing fuel leakage behind the pump and improving the oil supply efficiency of the gear pump when the high-pressure gear pump is working. Background technique [0002] A large number of gear pumps are used in the fuel system of aeroengines to pressurize the fuel and supply fuel to the engine. The gear pumps are required to have high outlet pressure, high fuel temperature, high working efficiency, compact structure, light weight and long service life. In order to ensure the above-mentioned working ability of the gear pump, the bearing structure of the fixed gear in the gear pump is required to have a simple structure, strong pressure bearing capacity, good lubricity, and high sealing performance. Currently, aviation fuel gear pumps use a large number of sliding bearings to fix the gears. [0003] The working principle of the gear pump is that a pair ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C17/26F16C33/74F04C15/00
CPCF16C17/26F04C15/00F04C15/0003F16C33/74F16C33/741F16C2360/22
Inventor 夏宗记杨惠英李学明
Owner BEIJING HANGKE ENGINE CONTROL SYST SCI & TECH
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