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公开(公告)号：US4810177A
公开(公告)日：1989-03-07
申请号：US108438
申请日：1987-10-13
IPC分类号： F01C21/08 , F04C18/344 , F04C29/02
CPC分类号： F01C21/0872
摘要： A vane compressor has a vane back pressure adjustment device including back-pressure chambers defined in a vane-supporting rotor and surrounded by vanes and side blocks secured to axial ends of a cylinder. The back-pressure chamber has axial ends disposed to follow a path against each of the side blocks when the rotor rotates. The path is divided into at least one high-pressure zone in which the vanes move across a pump outlet defined in the cylinder, and at least one normal-pressure zone which is the remainder of the path. In the normal-pressure zone, oil grooves defined in surfaces of the side blocks which face the rotor and supplied with oil from an oil sump in the vane compressor are in communication with the back-pressure chambers, to thereby maintain the oil pressure in the back-pressure chambers at a pressure level in the oil sump. In the high-pressure zone, the back-pressure chambers are out of communication with the oil grooves so that the oil fed into the back-pressure chambers is confined therein, except through a restrictor means. When the vanes move across the pump outlet, the vanes enter the high-pressure zone to trap oil in the back-pressure chambers to thereby elevate the oil pressure in the back-pressure chambers to a high level. Therefore, the vanes are prevented from being retracted deeply into vane slits in the rotor and then popping out into hitting engagement with the cylinder.
摘要翻译： 叶片式压缩机具有叶片背压调节装置，该叶片背压调节装置包括限定在叶片支承转子中的背压室，并被固定在气缸的轴向端部的叶片和侧块包围。 背压室具有轴向端部，当转子旋转时，轴向端部设置成沿着每个侧块的路径。 该路径被分成至少一个高压区域，在该高压区域中，叶片移动通过限定在气缸中的泵出口，以及作为路径的剩余部分的至少一个正常压力区域。 在正常压力区域中，限定在面向转子并且从叶片式压缩机中的油底壳供给油的侧块的表面中的油槽与背压室连通，从而将油压保持在 在油底壳中处于压力水平的背压室。 在高压区域中，背压室与油槽不连通，除了通过限流装置之外，供给到背压室的油被限制在其中。 当叶片移动穿过泵出口时，叶片进入高压区以捕获背压室中的油，从而将背压室中的油压提升到高水平。 因此，防止叶片深深地缩回到转子中的叶片狭缝中，然后弹出与滚筒的接合。
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