An new packing revolving sealing structure was introduced,sealing force was introduced and confirmed.

Optimization of spiral seal applied to mechanical driven shaft in flue gas desulphurization system of dense flow absorber;

Through an analysis of structural failure of dual-end-face, mechanical seal and soft packing seal parts of centrifugal oil pumps, a suggestion of improving the pump seal structure with spiral seal made of engineering plastic material is proposed and practiced with satisfactory effect.

Comparing former design of seal structure-stuffing seal,the new sealing structure-spiral seal was reslndied and introduced.

This paper briefly introduces the sealing principle of the screw sealing feed water pump, and deals with its frequent trip problem arising from inadequate pressure difference of seal water.

Problems in the construction design of screw seals;

Research And Optimizing of Sealing Capability For Screw Seal;

In this paper,sealing capability of screw seal for different construction type and different slot shape is discussed theoretically from the viewpoint of engineering application better practicality theoretical formula on sealing capability are proposed.

This paper Introduced the application of spiral sealing and control system in boiler feed pump, the design method of hand of spiral, best spiral dimension and vice-fit length of sealing is summarized.

Aimed at the existed shortcomings of contact typed sealing up,this paper put forward a point of view of adopting the spiral sealing instead of the traditional contact typed sealing up.