发明名称 |
Roller vane pump |
摘要 |
The invention relates to a roller vane pump for operating an automatic transmission for motor vehicles. The pump is provided with a pump housing (12), a rotor (4), a cam ring (2) and roller elements (7), which define a number of pump chambers (13). Fluid is communicated between a hydraulic channel (24) and a pump chamber (13) through suction ports (11 and 16) and discharge ports (17 and 18). According to the invention the pump is provided with a suction port (26) for allowing a predominantly radial flow of fluid to a pump chamber (13) and/or with a rotor (4) with slots (6) with a circumference (32) which is partly curved with a curvature substantially matching the curvature of the roller elements (7) and/or with a rotor (4) with a circumference segment (30) deviating at least partly from a circle, in order to decrease the amount of wear of pump parts as well as the noise level generated during pumping. <IMAGE> <IMAGE>
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申请公布号 |
EP0921314(A1) |
申请公布日期 |
1999.06.09 |
申请号 |
EP19970203854 |
申请日期 |
1997.12.08 |
申请人 |
VAN DOORNE'S TRANSMISSIE B.V. |
发明人 |
VAN WIJK, ELIAS;VAN SPIJK, JOHANNES GERARDUS LUDOVICUS MARIA |
分类号 |
F04C2/344;F04C15/06;F16H61/00;(IPC1-7):F04C15/02 |
主分类号 |
F04C2/344 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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