DISCUSSION ON CONTROLLABILITY OF MECHANICAL

SEAL AND ITS ENGINEERING APPLICATION

Sun Jianjun  Gu Boqin

(College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009)

Wei Long

(Department of Mechanical Technology, Nanjing College of Chemical Engineering and Technology, Nanjing 210048)

Abstract: The feasibility on engineering application of controllability study of mechanical seal is analyzed in theory and practice in this paper. Controllable parameter of mechanical seal includes face temperature, film thickness, friction torque, leakage rate and face pressure. Machinery includes electromagnetic iron, adjustor and fluid drive device, etc. Meanwhile, stationary ring with temperature sensor is complex, inconvenient to be set up and of low reliability in measuring film thickness. Torque sensor can be used successfully in measuring friction torque between main shaft and motor in the non-load mechanical seal test. A mechanical seal control system consisting of mechanical seal, torque sensor, hollow O-ring, signal adjustor, center processor and performer is designed.

Key words: Mechanical seal  Controllability  Engineering application  Operating life  Leakage rate

CLC No: TH136

江苏省高校高新技术产业发展项目(JH02－064)资助. Received 20040406, received in revised form 20020040620