Floating ring type damping sealing device

Abstract

The invention discloses a floating ring type damping sealing device for sealing a rotating shaft. The floating ring type damping sealing device comprises a baffle ring, an elastic ring and a floating ring. The floating ring is arranged outside the rotating shaft through a floating ring through hole of the floating ring in a sleeved manner, the inner surface of the floating ring is in clearance fit with the outer surface of the rotating shaft, the outer surface of the floating ring is provided with an annular groove, and the elastic ring is arranged in the annular groove; the baffle ring is arranged outside the rotating shaft through a baffle ring through hole of the baffle ring in a sleeved manner, the baffle ring surrounds the floating ring through an outer ring on the outer side of the baffle ring, and the outer ring inner wall of the baffle ring presses the elastic ring; and the floating ring is provided with radial throttling holes with the two ends being open, and the multiple throttling holes are uniformly distributed in the floating ring in the circumferential direction. The dynamic pressure and static pressure mixed bearing principle is adopted, fluid film bearing capacity is large, friction wear of the floating ring and the rotating shaft in the low-speed operation process can be avoided, and the floating ring type damping sealing device has the advantages of being high in operation work rotation speed, small in leakage quantity, long in service life and good in vibration reduction effect.

Description

technical field [0001] The invention relates to a sealing and damping device, in particular to a floating ring type damping sealing device for damping and sealing a rotating shaft. Background technique [0002] The floating ring seal device is also called the floating ring seal, which is a flow resistance type non-contact dynamic sealing structure. It achieves the purpose of sealing and preventing leakage through the fluid resistance effect in the sealing gap. A fluid film is formed in the tiny gap between them, and the fluid film has a certain bearing capacity to ensure that the floating ring and the rotating shaft are always in a non-contact state. Due to its automatic centering function, compared with the fixed seal, the floating ring seal has a smaller gap and lower leakage, and is widely used in the rotary shaft seal of steam turbines, compressors, rotary joints, rocket turbo pumps, etc. [0003] There are two problems in the traditional floating ring seal: first, the ...

AI Technical Summary

Problems solved by technology

[0003] There are two problems in the traditional floating ring seal: one is that the fluid film only has a dynamic pressure effect, and the dynamic pressure bearing capacity is small at low speed, and the floating ring moves with the rotating shaft, and there is friction and wear between the two

However, due to the small gap of the floating ring seal, under eccentric conditions, a large cross stiffness will be generated, which will have an adverse effect on the stability of the shafting system. In severe cases, it will cause the shafting system to become unstable and cause safety accidents.

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