Mechanical Seal Information Collection And Applications

Mechanical face seals are the equipments containing at least a pair of end faces perpendicular to axis of rotation, which are working in the liquid pressure and the elasticity of compensation organizations(or magnetic force) as well as the coordination of auxiliary seals to keep integrating closely and sliding relatively, take affect to prevent liquid leaking. Mechanical face seals are used to seal various fluids on a lot of occasions , it is the pillar of fluid seals in pump and compressor at present. Via the effort of several generation, though it was confirmed by experiments long ago that there is liquid film between mechanical sealing contact surface, the lubrication mechanism of mechanical face seals isn't still mastered. The design parameter can't be used to forecast the operation performance of mechanical face seals accurately. Therefore, the research focusing on the friction operating mode and mechanism the temperature distribution the dynamics property of sealing assembly will be significant in improving the design of mechanical face seals.According to the present research situations of mechanical face seals in theory and test, the work such as the information classifications of end faces, the theoretical calculations of the face information of mechanical seal face and experimental measurement as well as the application of the face information of mechanical seal face is done in this paper.On the basis of analysis about domestic and international research situation in mechanical sealing at present, various parameters for the mechanical face seals are classified using the knowledge of information theory for the first time. The concepts of the static and dynamic information of mechanical sealing are put forward, and the measurement methods of various information are also compared respectively.The temperature distribution of seal face is an important factor that can affect the performance of mechanical sealing. In this paper a kind of relatively reasonable temperature calculation method was put forward on the comprehensive foundation of the domestic and international temperature calculation methods. The convection coefficient and heat flow path direction are specified by means of formula calculation rather then artificial setting in this temperature calculation method, in which the parameters can be calculated according to the difference of structure size and operation condition. Compared with results of other temperature calculation method in identical boundary condition, the result of this method is more close to the result of test under the condition of saving time. Therefore, the method offers the basis and comparison for the theoretical calculation of the face information of mechanical seal.Experimental measurement is still the major method of the temperature research of sealing face because the determination of the boundary conditions is difficult to accord with the reality in the temperature theoretic calculation. Thermocouple was selected to measure the temperature of end face on the basis of comparison of various temperature test methods in this paper. After a thermocouple purchased from market was refitted and fixed to the stator who has two holes on the back, the temperature sensor was got. It is proved by experiment that the output linearity of the thermocouple is good and the biggest error compared with theoretical output does not exceed 9%.The torque of end face is the direct reflection of the friction state of end face and also the one of important dynamic information of mechanical seal face. A new kind of torque measurement method rather than the present torque measurement technique was applied to measure the torque of mechanical sealing face after having refitted the traditional structure in this paper. A lid containing a thin wall cylinder was designed to install stator and measure torque. The method who pastes strain gauge symmetrically outside thin wall cylinder to measure the torque of end face in this paper is a kind of new torque measurement technique. It was proved by test t...