公开(公告)号：US6068448A

公开(公告)日：2000-05-30

申请号：US761871

申请日：1996-12-09

申请人： Ryoji Muratsubaki ,  Yukiaki Nagata ,  Osamu Honokidani ,  Masanori Kanemitsu ,  Masanori Takimae ,  Shinko Yamagishi ,  Tadashi Urasawa ,  Tadashi Sugimori

发明人： Ryoji Muratsubaki ,  Yukiaki Nagata ,  Osamu Honokidani ,  Masanori Kanemitsu ,  Masanori Takimae ,  Shinko Yamagishi ,  Tadashi Urasawa ,  Tadashi Sugimori

IPC分类号： F04B3/00 ,  F04B9/02 ,  F04B53/16 ,  F04B49/06 ,  F04B39/10

CPC分类号： F04B53/166 ,  F04B3/00 ,  F04B9/02

摘要： A high pressure hydraulic pump apparatus constituting a two-stage pressurizing hydraulic booster combining a pair of plunger pumps. The first and second pumps are driven into a push-pull synchronous operation at the equal stroke with each other. The per-stroke displacement of the first pump is greater than that of the second pump. The first pump draws by self-suction the liquid from a reservoir while the second pump is on the pressurizing and delivery stroke. When the first pump is on the delivery stroke, the liquid pressurized to a certain intermediate pressure by the first pump is sucked into the second pump. During the next reverse stroke the second pump further pressurizes and discharges the liquid while the first pump effects the suction stroke. At the final pressurization by the second pump, the driving stroke length of the pump is controlled to a limited value which provides a minimum delivery flow required for the interior of a load vessel to attain a target pressure in accordance with the compressibility of the liquid and the detection of a load pressure.

摘要翻译： 一种组合一对柱塞泵的两级加压液压助力器的高压液压泵装置。 第一和第二泵以相等的冲程彼此驱动进入推挽同步操作。 第一泵的每冲程位移大于第二泵的每冲程位移。 当第二个泵处于加压和输送冲程时，第一个泵通过自吸从贮存器中抽出液体。 当第一泵处于输送行程时，被第一泵加压至一定中间压力的液体被吸入第二泵。 在下一个反冲程中，第二泵进一步对液体进行加压和排出，同时第一泵实现吸入冲程。 在由第二泵最终加压时，泵的驱动行程长度被控制到有限的值，其提供负载容器的内部所需的最小输送流量以根据液体的压缩性获得目标压力，并且 检测负载压力。