Analysis of Impact Fatigue Life for Valve Leaves in Small Hermetic Reciprocating Compressors
نویسندگان
چکیده
Impact fatigue life of valve leaves has great influence on energy saving performance and lifetime of small hermetic reciprocating compressors. This paper presented a test system that intended to analysis and evaluate of impact fatigue life of valve leaves used in small hermetic reciprocating compressors. Firstly, an incentive system was designed to simulate real work condition for valve leaf. Then, a data acquisition system was built to collect the sound signal while valve leaf was being under test. Simultaneously, the system could control the working state of incentive system so that test could be terminated automatically once fatigue was detected. Finally, fatigue detection system was designed to detect fatigue of valve leaf. Fatigue detection was the key point of this test system. Fast Fourier Transform (FFT) and Wavelet Packet Transform (WPT) were applied to analyze sound signal, both of which were effective in detecting the damage through analyzing. Facts showed that the test system provided a feasible approach to evaluate impact fatigue life for valve leaf manufacturing.
منابع مشابه
Numerical Study and Experimental Comparison of CO2 Reciprocating Compressors for Small Cooling and/or Freezing Capacity Applications
The present paper is a numerical and experimental comparative study of hermetic and semi-hermetic reciprocating compressors working with carbon dioxide as fluid refrigerant against the conventional R134a hermetic compressors. When cooling conditions for one-stage compressor type (i.e., evaporation temperatures between 7.2oC and –10oC) have been considered, the numerical and experimental results...
متن کاملAdvanced Numerical Simulation Model of Hermetic Reciprocating Compressors
A complete and advanced numerical simulation model of the thermal and fluid-dynamic performance of hermetic reciprocating compressors has been developed and is used in the optimization Electrolux compressor design. During the last few years several global experimental validations have been carried out. A detailed instrumentation of a commercial reciprocating compressor for household refrigerato...
متن کاملParametric Study of Hermetic Reciprocating Compressor
A numerical simulation of the thermal and fluid-dynamic behaviour of hermetic reciprocating compressors has been developed by solving the one-dimensional and transient governing equations of the flow (continuity, momentum and energy) in the whole compressor domain. The governing equations are discretized using an implicit control-volume formulation. A SIMPLE-like algorithm, extended to compress...
متن کاملCAE Approach to the Development of Rotary Compressors
This paper describes the computer aided engineering (CAE) approach to in,estigate the vibration of rolling piston type rotary compressors in the design and analysis stages. At first, the optimum design procedure for the compressor and piping system is presented. Then ,a compressor data base used for a dynamic simulation of the royary compressors are carried out. Finally, a practical application...
متن کامل