摘要
提出利用激光三角法测量压缩机的活塞位移,结合压力传感器测得的气体压力,计算得到压缩机的活塞PV功;忽略活塞间隙的漏气损失,可计算得压缩机的输送PV功。设计了适用于激光测量活塞位移的带可视化窗口的压缩机外壳。针对一台特定压缩机,理论计算活塞与气缸之间的漏气量并通过实验验证了漏气量为小量。不同工况下对压缩机活塞位移进行测量,计算得到相应的活塞PV功和输送PV功,并与热线测量的输送PV功进行相互验证。利用激光测活塞位移的方法,观察脉冲管制冷机降温过程中压缩机活塞位移、压力、PV功及相位角的变化,给出相关分析。
The method of laser triangulation was proposed for measuring piston displacement of compressor in pulse tube refrigerator（PTR）.The PV power of piston face was calculated from the piston displacement and the pressure measuring with pressure transducer.The PV power delivered to the cold end was determined by ignoring the flow loss through the gap between piston and cylinder.A compressor shell with a quartz glass window on the end was designed for the shining through of laser.The calculated ratio between flow loss and flow produced by piston displacement was relatively small and the results were verified by experiment.Piston displacement and PV power of the compressor under different conditions were measured and calculated respectively with an experiment system,the results were similar to those from using a hot wire anemometer.The changes of piston displacement,pressure,PV power and phase shift were observed with the laser method and corresponding analysis were given.
出处
《低温工程》
CAS
CSCD
北大核心
2012年第2期5-10,共6页
Cryogenics
基金
国家自然科学基金(51006112)项目资助
关键词
压缩机
激光
活塞位移
PV功
compressor
laser
piston displacement
PV power
