Reciprocating Hydrogen Compressor Pipe To Vibration For Analysis And Structure Improvement

Reciprocating compressor consist of two types, piston compressor and plunger piston compressor, the first type compressor is the most widely used. The working principle of piston compressor is that one or more piston do reciprocating motion in airtight container to compress the air. Because of the periodical intake and discharge of piston, there is the air-current pulsation in the pipeline which can rise to the piping vibration. Piping vibration not only make control instruments and valve lose efficacy, but also decreases the capacity effectiveness of compressor. Strong pipeline vibration may lead to serious harms:leakage and explosion. So the study to the vibration control of the pipeline of piston compressor have momentous theoretical significance and current significance.In this passage I will build the model of the pipeline by Proe/engineer, then import ansys for pipeline structure of modal analysis used to obtain the top 10 order natural frequency and vibration mode figure of pipeline and air-current. Then improving the structure of the pipeline to avoid resonance of the pipe and air-current by adding the pipeline bracket and airflow orifice plate. Through comparing with the stimulate frequency, adding pipe bracket and airflow orifice plate can change the natural frequency of pipeline and air-current in order to keep them away from stimulate frequency area. This can provide the reliable theory basis for optimization pipeline.Harmonic response analysis for pipeline is also made which is calculated by ansys through the simulation practical situation and loading corresponding load. According to the harmonic response calculation results, we can obtain the points which is the most vibration displacement. Adding pipeline bracket and airflow orifice plate at these points in order to make the vibration weaken.Some vibration control methods are given at last. Such as eliminating air-current pulsation in the design of main engine, setting up buffer, setting up acoustic filters, avoiding the air-current and pipeline vibration and so on. These methods, not only in the times of designing pipeline, but also when the compressor cannot been adjusted greatly but also working unsafely, are of momentous guiding significance.