Spray into the compression chamber of lubricating oil will fill into the leak path, sealing effect, effectively reduce the gas leakage. As to the leakage of oil, it will cut gas volume in suction chamber, heating in gas, directly reduce the displacement. If the gap was filled with lubricating oil, no gas leaks, but relatively games leak path wall of high speed in the viscous shear loss that nots allow to ignore. In addition, the leakage of oil from the low pressure cavity to the high pressure cavity will also cost a certain capability. So on spray oil leakage of single screw air compressor, to consider the sealing oil and viscous shear together lead to the conflict of elements such as power consumption.
According to the working process of the single screw compressor internal characteristics and relevant test, can think, value is not as long as the gap is too big, seal oil leakage passage can be extremely well. Then oil instantaneous leakage quantity and viscous shear loss to calculation formula are obtained.
Leakage passage, there are two cylinder, the star is next to the tooth surface and screw groove wall leakage of triangle. The area to be able to pass smaller type line planning control. So after their oil and gas leakage is very small.
Through Test known, about the two leakage around the vent channel, because the pressure difference before and after its bigger (for suction exhaust pressure difference), even if the fuel injection quantity is larger, the oil is not easy to be sealed completely. Test and calculation indicate after the gas leakage is larger, here is air compressor key elements of displacement and thermal power.
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| denair |
