Design of piston compressor's displacement test system

DU Bin-kang， GAO Hong-gang， LU Pei， LU Zhi-ming
（College of Mechanical Engineering，Zhejiang University of Technology， Hangzhou 310012， China）

Abstract：In order to measure the high speedily changed displacement of the piston compressor in the last stage accurately，modern detecting technology and collecting method was applied to build the performance test system based on the piston compressor performance test experiment. In this test system，GB-3000A pressure transmitter was used to detect the pressure and LM35 temperature transmitter was applied to detect the temperature. Finally，the pressure and temperature data was collected by PCI2000 data acquisition board to the performance test system built by the high-level programming language，Visual Basic. Comparing the displacements tested by the performance test system，the displacements tested by the original method and the theoretical displacements in different conditions，it reveals that the displacements tested by the performance test system are close to the displacements tested by the original test method and they are even more closer to the theoretical results. It informs that the piston compressor's displacement test system has the quality of high accuracy，reliability and rapidity.
Key words： piston compressor； performance test； Visual Basic （VB）； data acquisition；displacement