PDF《Compressors》

3 International Compressor Engineering Conference at Purdue, July 14-17,

2008 its time-dependent pressure decay is measured by a semiconductor pressure transducer. 3. LEAKAGE TEST RESULTS Measured pressure decays in the high pressure chamber due to leakage through

10 μm axial and radial clearances with the surface roughness of 0.4 μm are shown in Figures 2a and 3a as solid lines, where four additional test results with different initial pressures from 1.1 MPa to 3.1 MPa are also plotted. The initial pressures were chosen as being representative of pressure differences between adjacent compression chambers in scroll compressors. At time t =0, the release valve opens the low pressure chamber to the atmosphere and then the high pressure decays due to refrigerant leakag........