Vibration Analysis Of ZW Type Reciprocating Compressor And Its Pipe System

Compressor is a kind of general equipment for compressing and transporting gas.when reciprocating compressor running, the compressor itself and its piping will vibrate because of its structure, operation mechanism,rough manufacture and other reasons, that cause the serious influence for production efficiency and personnel safety.therefore, we need research reciprocating compressor and its piping vibration problem, not only it can provide the basis for the optimization design and improvement of the structure of the compressor and its pipe system,but also can reduce the possibility of the failure of reciprocating compressor.In this paper, firstly, according to the structure and working principle of reciprocating compressor, the vibration mechanism of reciprocating compressor and the reason of pipe system vibration are analyzed,and show that reciprocating compressor vibration excitation source arising mainly from the inertial force and inertial moment, gas force,the friction and mechanical shock, and the inertia force and inertia moment are the most important factors in influencing factors. And the main reason for the vibration of the piping system comes from the pulsation of the pipe system and the resonance of the gas cylinder and the pipe structure itself. Then the virtual models of the key components of the reciprocating compressor were established by using the 3D drawing software SolidWorks, and the force analysis of the reciprocating compressor was carried out, using finite element software ANSYS, the modal analysis and is carried out on the crankshaft, and the finite element analysis is carried out on the compressor body.The first six order modes of the crankshaft and machine body of the ZW-0.8/10-16 type reciprocating compressor show that the crankshaft occurs mainly bending vibration and machine body occurs mainly bending vibration and torsional vibration. Further, the research methods of pipe system vibration are analyzed, compared with transfer matrix method, transfer coefficient method and stiffness matrix method, the finite element method has special advantages. And the existing piping system is established, the modal analysis of the gas cylinder and pipe and harmonic response analysis of the pipeline structure are carried out by using ANSYS.we obtained the frequency of the gas column, the natural frequency of the pipeline, the pulsation pressure of the pipe system and the response of the pipe vibration, and it provides a theoretical reference for the improvement of pipeline structure.Finally, the crankshaft of ZW-0.8/10-16 type reciprocating compressor is optimized, the inertia force is reduced by 51%.Structural optimization is carried out on the body by increasing the wall thickness and coating the damping material on its surface.and the vibration amplitude of machine body is greatly reduced, the vibration mode becomes simple.And a variety of vibration reduction measures are used on the pipe system and focus on the change of the support number and location, and the vibration amplitude of the pipe system is greatly reduced and the structure resonance of the pipeline is avoided.