Rotating sheet type high-temperature high-pressure gas (liquid) elastic contact type dynamic sealing device and preparation method

Abstract

The invention provides a rotating sheet type high-temperature high-pressure gas (liquid) elastic contact type dynamic sealing device which comprises a movable ring and a stationary ring, wherein the movable ring is hermetically fixed to an outer circumferential surface of a rotor, and the stationary ring is fixed to an inner molded surface of a shell corresponding to the rotor. The movable ring comprises a low pressure side matrix, a high pressure side matrix and a plurality of sealing sheets distributed along the circumferential direction of the rotor located in an inner cavity formed by thelow pressure side matrix and the high pressure side matrix. Inclination angles exist between the sealing sheets and the axial direction and the radial direction of the rotor. Compared with the prior art, the sealing sheets not only play a vertical cutting role to an air flow, but also change the direction of the air flow and thrust the incoming flow reversely. The sealing sheets play a disturbingrole to entering high-temperature high-pressure gas (liquid), so that the gas (liquid) cannot pass through a gap between the movable ring and the stationary ring, thereby playing a sealing role to a medium.

Description

technical field [0001] The invention relates to the technical field of mechanical seals, in particular to a rotating disc type high temperature and high pressure gas (liquid) body elastic contact type dynamic sealing device and a preparation method. Background technique [0002] The dynamic seals for high temperature and high pressure gases mainly include soft and hard packing seals, labyrinth seals, piston ring seals and brush seals. The core of sealing is to reduce the leakage of sealing medium per unit time as much as possible under the same conditions. [0003] The soft packing is sealed under the appropriate packing and structure, the maximum applicable pressure is 35MPa, the temperature is 600°C, and the linear speed is 20m / s, which can meet the sealing requirements under general conditions. It is prone to packing hardening under open flame conditions, and the wear compensation is insufficient; The packing seal uses a pressure of 350MPa and a linear speed of 12m / s, wh...

AI Technical Summary

Problems solved by technology

[0005] The piston ring seal is a high-temperature and high-pressure gas sealing structure of the most commonly used engine and similar structures. It must work under continuous lubrication and cooling conditions, and has low adaptability to working conditions and is extremely easy to wear

[0006] As the key technology of modern turbomachinery, the brush seal has a contact surface of 120 pieces / mm 2 The metal wire group is grown on the forming substrate, the production is difficult, the cost is high, and the lubrication and cooling conditions are high

In addition, the brushing of the shaft by the brush wire is serious

Images