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A wear-resistant sealing mechanism for a hydraulic pump drive shaft for stopping jaws

A technology of sealing mechanism and hydraulic pump, applied in the sealing field of hydraulic pump, can solve the problems such as the failure of the aircraft hydraulic system to work normally, the oil leakage of the hydraulic pump drive shaft exceeding the standard, and the oil leakage easily exceeding the standard, etc., so as to avoid mechanical seal failure, The effect of increasing the contact area and not easy to wear

Active Publication Date: 2022-07-29
AVIC LIYUAN HYDRAULIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The hazards of excessive oil leakage of the hydraulic pump drive shaft: The excessive oil leakage of the hydraulic pump drive shaft may cause the oil in the fuel tank of the aircraft hydraulic system to decrease rapidly, causing the aircraft hydraulic system to fail to work normally; the oil leaked out of the standard A large number of accumulations in the engine compartment will cause catastrophic accidents if exposed to open flames
[0009] Therefore, the existing sealing mechanism of the drive shaft has the disadvantage that the amount of oil leakage is easy to exceed the standard, which may cause the aircraft hydraulic system to fail to work normally and cause catastrophic accidents

Method used

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  • A wear-resistant sealing mechanism for a hydraulic pump drive shaft for stopping jaws
  • A wear-resistant sealing mechanism for a hydraulic pump drive shaft for stopping jaws
  • A wear-resistant sealing mechanism for a hydraulic pump drive shaft for stopping jaws

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but not as a basis for limiting the present invention.

[0032] Example. A sealing mechanism for the wear-resistant hydraulic pump drive shaft of the stopping jaw, such as Figure 1 to Figure 6 As shown, the sealing mechanism of the transmission shaft consists of the transmission shaft 1, the leather cup 2, the rear cover bushing 3, the sixth sealing ring 4, the first sealing ring 5, the second sealing ring 6, the third sealing ring 7, the first pin Sub 9, oil leakage pipe joint 10, fourth sealing ring 11, bearing 12, inner shaft 13, toothed ring 15, retaining ring 16, shaft sleeve 17, sealing bushing 18, fifth sealing ring 19, gasket 20, The mounting seat 21, the bolt 22, the wave ring 23, the rear cover 24, the second pin 25 and other components are composed. The hydraulic pump is fixed on the aircraft accessory casing through the mounting seat 21, an...

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Abstract

The invention discloses a wear-resistant sealing mechanism for a hydraulic pump transmission shaft of a stopper claws. The sealing mechanism of the transmission shaft is provided with a sealing bushing (18) and a rear cover bushing (3). The sealing bushing (18) is provided with a gap (28), the rear cover bushing (3) is provided with a stop claw (27) matched with the gap (28), and the rear cover bushing (3) is made of horse Sterile stainless steel, the outer diameter of the sealing bush (18) is greater than or equal to the outer diameter of the stop claw (27), the outer diameter of the sealing bush (18) and the outer diameter of the stop claw (27) The difference between them is less than or equal to 7mm; the grade of the martensitic stainless steel is 1Cr 17 Ni 2 . The invention has the advantages that the amount of oil leakage is not easy to exceed the standard, and can avoid the failure of the aircraft hydraulic system to work normally and the occurrence of catastrophic accidents caused by the increase of the amount of oil leakage.

Description

technical field [0001] The invention belongs to the field of sealing of hydraulic pumps of an aircraft hydraulic system, in particular to a sealing mechanism of a hydraulic pump drive shaft with wear-resistant stopping claws. Background technique [0002] The sealing mechanism of the transmission shaft of the hydraulic pump of the aircraft hydraulic system usually adopts the structural form combining the mechanical seal and the sealing ring seal, which is widely used in hydraulic pumps at home and abroad. The mechanical seal includes a sealing bushing (also known as a fixed ring) and a toothed ring (also known as a moving ring). It can ensure a certain sealing effect under the conditions of static and relative rotational motion. [0003] During the working process of the hydraulic pump, the hydraulic oil enters the pump cavity through the gap between the rotor and the plunger, the gap between the oil separator and the rotor, the gap between the slipper and the wear-resistan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/16F16C35/12F16C33/72F04B53/00
CPCF16J15/16F04B53/00F16C35/12F16C33/723
Inventor 郎鹿余稀梦王兴艳徐荣孙凯
Owner AVIC LIYUAN HYDRAULIC
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