【正文】
被壓縮。 d)缸體氣冷或水冷措施,使得壓縮機中氣體溫度盡可能保持等溫狀態(tài),而被輸送的氣體體積相應(yīng)增加。 e)在壓縮期間,控制氣體泄漏的措施是靠壓縮機往復(fù)運動活塞上的密封環(huán)或者依靠旋轉(zhuǎn)式壓縮機上的細微間隙。 Hydraulic Systems Sources of Pressure Pumps and Compressors Fundamentally most pumps suitable for pumping hydraulic fluid will operate with air or gas, although most oil pumps make poor air pressors, and some pressors will not operate with inpressible fluid without modification. General considerations. The main requirements of a hydraulic pump capable of delivering sufficiently great a pressure to be of practical use, are: a. Means for controlling fluid leakage either by special seals or close working clearances. b. A substantially uniform, nonpulsating delivery. c. The absence of trapping of fluid during rotation, since the fluid is for all practical purpose inpressible. d. Mechanical balance to a sufficient degree to enable t