公开(公告)号：US3924969A

公开(公告)日：1975-12-09

申请号：US51910174

申请日：1974-10-30

申请人： BOSCH GMBH ROBERT

发明人： ROMETSCH WERNER ,  VEIL KARL

IPC分类号： F04C14/22 ,  F04B49/08 ,  F04B49/10 ,  F04B49/00

CPC分类号： F04C14/223 ,  F04B49/08

摘要： A variable-flow hydraulic pump has an adjusting member movable between a plurality of flow-adjusting positions. A larger and a smaller piston act upon this member at opposite sides thereof. The smaller piston is always connected with the high-pressure side of the pump. A multi-position servo-control unit is connected in circuit with the high pressure side and the lowpressure side and includes a relief valve connected with the larger piston and serving to control the flow of fluid from the high-pressure side to the same when the fluid pressure exceeds a preset limit. A control valve is connected with the high pressure side and with the servo-control unit and serves to operate at a pressure slightly below the preset limit and at this time to move the servo-control unit to a position in which the unit connects the larger piston with the high-pressure side and interrupts the communication of the larger piston with a low-pressure space.

公开(公告)号：US3866421A

公开(公告)日：1975-02-18

申请号：US39710073

申请日：1973-09-13

申请人： BOSCH GMBH ROBERT

发明人： KERSTEN GUNTER ,  FRICKE HANS-JURGEN ,  VEIL KARL

IPC分类号： F16H61/40 ,  F16H61/4104 ,  F16H61/4139 ,  F16H61/4165 ,  F16B21/04

CPC分类号： F16H61/4104 ,  F16H61/4139 ,  F16H61/4165 ,  Y10S60/912

摘要： The high pressure conduit and the low pressure conduit of a hydrostatic transmission are connected by a flushing control valve provided with a discharge outlet into a low pressure area, and by a pressure limiting valve which permits at increased pressure in the high pressure conduit, fluid to flow therethrough so that the fluid flowing ouf of the pressure limiting valve is divided into a first flow part which is discharged by the control valve, and a second flow part entering the low pressure conduit at a point spaced from the point at which a priming pump discharges into the low pressure conduit. In this manner, only part of the hot fluid flows into the pump of the hydrostatic transmission while an other part of the fluid is discharged into a discharge area, and displaced in the low pressure conduit means by cool fluid from the priming pump.

摘要翻译： 静压传动装置的高压导管和低压导管通过设置有排出口的冲洗控制阀连接到低压区域，并通过压力限制阀连接，压力限制阀允许在高压管道中增加压力，流体到 流过其中，使得限流阀的流体流动被分成由控制阀排出的第一流动部分，以及第二流动部分在与起动泵的位置间隔开的点处进入低压管道 排入低压管道。 以这种方式，只有部分热流体流入静液压变速器的泵，同时流体的另一部分被排放到排放区域中，并且通过来自起动泵的冷却流体在低压管道装置中移位。