Nonlinear Dynamic Analysis of Reciprocating Compressor Considering Different Clearance

The dynamic model of reciprocating compressor was established, and then it's dynamic behavior with different clearance was studied. The effect of clearance is modeled by elastic damped internal force to establish collision contact relationship. The dynamic simulation of reciprocating compressor under different crankshaft speeds and different clearance is carried out respectively. From the simulation results, it can be seen that the dynamic behavior of reciprocating compressor is greatly affected by different clearance and crankshaft speed. The number and time interval of two large contact collisions are directly related to crankshaft speed. Clearance shapes have little effect on two large collision frequencies and collision intervals. The Lyapunov exponent is used to study the nonlinear characteristics of the system. The results show that chaos occurs when the system contains different clearance.