Shaft end sealing structure and sealing performance test device for deep water reducer

Abstract

The invention provides a shaft end sealing structure and a sealing performance testing device for a deep-water reducer, including a pressure vessel assembly, an outer shell assembly, a mechanical seal assembly and a drive assembly, and the first end of the outer shell assembly is located inside the pressure vessel assembly , the second end of the outer casing assembly is fixedly connected to the first end of the second head of the pressure vessel assembly, the mechanical seal assembly is located inside the outer casing assembly, the bell housing of the drive assembly and the second end of the second head of the pressure vessel assembly end connection. In the mechanical seal assembly, the first end of the static seal ring is provided with a square hole and an oval hole in the radial direction, the static seal ring is connected to the first end of the dynamic seal ring, and the spring seat is connected to the dynamic seal ring through the second pin shaft. The second end of the connection, the spring is located in the spring hole of the spring seat. In the present invention, the square-elliptical double-layer composite texture processed on the static sealing ring enables the liquid film between the end faces of the friction pair of the mechanical seal to generate a dynamic pressure effect, and the sealing end faces realize non-contact, high stability and low wear operation.

Description

technical field [0001] The invention relates to the technical field of reducer shaft end sealing, in particular to a shaft end sealing structure and a sealing performance testing device for a deep water reducer. Background technique [0002] With the development of deep sea exploration and other industries, higher requirements are put forward for the mechanical seal of the shaft end of the deep water reducer. For the high water pressure environment in the deep sea, the shaft end seal of the reducer must achieve zero leakage, low maintenance cost and long service life. . 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. Thereby affecting the sealing performance and life of the mechanical seal, and there is not...

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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