pump based on TRIZ theory

 

 

SUN Xiao pan1, LI Jing1, LIU Hong wei2, WANG Shan kai1, FAN Xiao jian1

 

(1. College of Mechanical and Electrical Engineering Xi′an Polytechnic University, Xi′an 710048, China;

 

2. The Technology Company of Xi′an Kangben, Xi′an  710048, China)

 

 

Abstract: Aiming at the problems that the insufficient strength of crankshaft, vibration and shorten the life span which were caused by the eccentric of emulsion pump crankshaft, a study was conducted on the eccentric crank. Conflict analyses of the eccentric problem of emulsion pump crankshaft were carried out on the theory of theory of innovation and problem sloving (TRIZ). First the conflict which between complexity of device and stability of the system was used to obtain the essence of the problem which the shaft neck was confined to adjust the axial position. The issue could be solved by air bearings or magnetic bearings instead of the original supporting structures through the principle of changing dimension. Then the optimal one was selected relying on the conflict which was between the degree of difficulty of monitoring and the low productivity. The scheme choose magnetic bearings by the principle of parameter variation. At last, the applicability analysis of the optimal scheme was completed. The results indicate that the magnetic bearings can fulfill the requirements to supporting and reducing eccentric.The scheme can also provide theoretical reference for the designing of new supporting structures of the crankshaft of emulsion pump.

 

Key words: crankshaft eccentric; magnetic bearing; theory of innovation and problem sloving (TRIZ); conflicts