液壓裝置-外文資料翻譯-液壓系統(tǒng)-文庫(kù)吧資料
2025-01-27 03:46本頁(yè)面
【正文】 t prepression, as soon as the delivery port opens, the gas in the delivery pipe expands back into the pump, and the whole volume has again to be pressed. A rotary pressor with prepression cannot be operated with hydraulic fluid. d. Provision for air or water cooling of the cylinder so that the temperature of the air in the pressor may be kept as near isothermal as possible, and the volume of air being delivered correspondingly increased. This is a feature not normally necessary on a hydraulic pump. e. Means for controlling gas leakages during pression either by piston rings on a reciprocating piston pressor, or fine clearances on the rotary types. f. Adequate inlet valve to prevent throttling of the ining air, with the consequent loss of volumetric efficiency. 。 f）配置足夠的進(jìn)氣閥的面積以防止因進(jìn)來(lái)的氣體在節(jié)流過(guò)程中所產(chǎn)生的容積效率的損失。這是液壓泵在正常情況下所不需要的特性。具有預(yù)壓縮裝置的旋轉(zhuǎn)壓縮
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