Shaft end sealing structure for deepwater speed reducer and sealing performance testing device

Abstract

The invention provides a shaft end sealing structure for a deepwater speed reducer and a sealing performance testing device. The shaft end sealing structure for the deepwater speed reducer comprises a pressure vessel assembly, an outer shell assembly, a mechanical sealing assembly and a driving assembly; a first end of the outer shell assembly is located inside the pressure vessel assembly; a second end of the outer shell assembly is fixedly connected with a first end of a second end socket of the pressure vessel assembly; the mechanical sealing assembly is located in the outer shell assembly; and a bell jar of the driving assembly is connected with a second end of the second end socket of the pressure vessel assembly. In the mechanical sealing assembly, a square hole and an oval hole are separately formed in a first end of a sealing static ring in the radial direction; the sealing static ring is connected with a first end of a sealing movable ring; a spring seat is connected with a second end of the sealing movable ring through a second pin shaft; and a spring is located in a spring hole of the spring seat. According to the invention, the square-oval double-layer composite texture machined on the sealing static ring enables a liquid film between the end faces of a mechanical sealing friction pair to generate a dynamic pressure effect, and non-contact, high-stability and low-abrasion operation of the sealing end faces is achieved.

Description

Technical field [0001] The present invention relates to the sealing technology of gear gear shaft end sealing, and more particularly to a shaft end sealing structure and a sealing performance test device for deep water deceleration. Background technique [0002] With the increasing development of deep-sea probation, the mechanical seal of deep water with reduction, and the high-water pressure environment of deep sea, the replacement axis end seal must reach zero leakage, low maintenance costs and long life use . For ordinary contact mechanical seals, huge pressure is generated between the huge water pressure, the sealing ring and the sealing static ring, when the speed is operated, the sealing ring and the sealing stop are friction, and the wear of the friction surface is accelerated. Thereby affecting the sealing performance and life of the mechanical seal, and there is no market sealing test device for deep water. [0003] For a mechanical sealing structure, a mechanical sealin...

AI Technical Summary

Problems solved by technology

For ordinary contact mechanical seals, due to the huge water pressure, a huge pressure is generated between the sealing dynamic ring and the sealing static ring. When the reducer is running, the sealing dynamic ring and the sealing static ring rub against each other, which accelerates the wear of the friction surface. As a result, the sealing performance and life of the mechanical seal are affected, and there is no sealing test device for deep water reducer on the market

[0003] Aiming at the published patent application number 201710669154.3, a connection structure between the dynamic ring and the static ring of a mechanical seal is mainly aimed at the wedge-shaped surface of the static ring provided at one end of the sealed static ring. The wedge-shaped surface of the dynamic ring and the wedge-shaped surface of the static ring abut each other to achieve the sealing effect , but the wedge-shaped surface of the static ring rubs violently during operation, and the sealing ring wears seriously, which affects the sealing performance and life of the mechanical seal

For the published patent application number 201520050274.1, after the high-pressure gas is introduced, it is judged by the pressure change of the manometer whether there is leakage between the dynamic ring and the static ring of the marine mechanical seal pressure test device. There is a first seal ring and a second seal ring in other connection parts, so this device can only be used for static seal experiments, and the dynamic seal performance of the mechanical seal device cannot be tested.

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