Production test results showed that while only used long nozzle and no sealed nozzle joint gap, the sealing effect was lower: oxygen content of inner ambience in nozzle was 10.0%～18.0%; as used long nozzle and sealing ring, the sealing effect appreciably advanced, especially for first casting heat, oxygen content of inner ambience in nozzle was 1.0%～15.0%;
The paper analyzes the reasons for failure of mechanical seals for caustic circulation pump ( E -GA203)of the ethylene plant, the seal structure is improved and the materials of the rubbing pair is used, resulting in good sealing effect and economical benefit.
The reason of often leakage for water pump packing shaft seal is that the present water seal structure and seal material are not suitable for seal. After reconstruction,the water seal structure is canceled,the seal material is changed. The seal effectiveness is fairly good.
It is shown that the seal efficiency is relevant to the amplitude of leakage fluctuation,furthermore,the sequence of H/W from 0 3,0 5 to 0 1 is also the order of both increasing seal efficiency and increasing amplitude of leakage fluctuation.
As a general rule, the degree of seal effectiveness is a function of the gasket deformation or percent compression.
Minimization of seal clearance is necessary to achieve labyrinth seal effectiveness.
This progressive deterioration of seal effectiveness and the resulting turbine performance erosion has spurred the search for viable alternatives.
This paper describes the Construction of the piston rod stuffing box and the Pressure Submitted on the piston rod packing and provides the method of Calculating the amount of gas leaking from the stuffing box in the non-lubricated reciprocating Compressor.
In this paper we first point out the position and feature of the liquid seal among the sealing technology for the clean room,and then introduce the physical and chemical performance of a new special kind of sealing liquid,and we make some experiments in its sealing capacity and give some detections for its effect.Finally,we analyze the applied value and abvantage for this new technology.
The main physico-mechanical properties of soft graphite packing are briefly introduced"."This material has been applied to refit packing seal of water pump by Shanghai metallurgical system since 1980. Some methods to improve seal effect, to decrease power expense, and to prolong service life are emphasized.