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    • 73. 发明公开
    • Hydraulic pump
    • 液压泵
    • EP1555432A1
    • 2005-07-20
    • EP04250254.2
    • 2004-01-19
    • Delphi Technologies, Inc.
    • Bootle, Geoffrey David
    • F04B1/04
    • F04B1/0443F04B1/0408F04B1/0413F04B1/0435F04B1/0531F04B7/04
    • An hydraulic pump (100) comprises a plurality of pumping bores (16a - 16d), each pumping bore (16a - 16d) including an inlet port (32a - 32d) for the supply of hydraulic fluid into said pumping bore (16a - 16d), a delivery port (30a - 30d) for the delivery of said hydraulic fluid from said pump (100) and a plurality of pump plungers (20a - 20d), each pump plunger (20a - 20d) being reciprocable within a respective one of said pumping bores (16a - 16d). Each pump plunger includes a head portion (22a - 22d) and a skirt portion (24a - 24d), and each pump plunger (20a - 20d) defines with said pumping bore (16a - 16d) a pumping chamber (23a - 23d) disposed between said head portion of said pump plunger and one end of said pumping bore and a transfer chamber disposed between said head portion (22a - 22d) and said skirt portion (24a - 24d) of said pump plunger (20a - 20d). The pump also includes communication means connected between the pumping chamber of each pumping bore and the transfer chamber of an adjacent pumping bore, and drive means (140) for reciprocably driving each of the pump plungers (20a - 20d) within said pumping bores (16a - 16d) such that hydraulic fluid is drawn into said pumping chamber through the inlet port of an adjacent pumping bore and pumped from said pumping chamber through the delivery port of said adjacent pumping bore. The drive means (140) includes means for temporarily halting at least one of the pump plungers (20a - 20d) during a part of its stroke.
    • 液压泵(100)包括多个泵送孔(16a-16d),每个泵送孔(16a-16d)包括用于将液压流体供应到所述泵送孔(16a-16d)中的入口(32a-32d) ,用于从所述泵(100)输送所述液压流体的输送口(30a-30d)和多个泵柱塞(20a-20d),每个泵柱塞(20a-20d)可在所述泵 抽油孔(16a〜16d)。 每个泵柱塞包括一个头部分(22a-22d)和一个裙部(24a-24d),每个泵柱塞(20a-20d)与所述泵送孔(16a-16d) 在所述泵柱塞的所述头部和所述泵送孔的一端之间,以及设置在所述泵柱塞(20a-20d)的所述头部(22a-22d)和所述裙部(24a-24d)之间的传送室。 泵还包括连接在每个泵送孔的泵送室和相邻泵送孔的传送室之间的连通装置,以及驱动装置(140),用于在所述泵送孔(16a)内可往复地驱动每个泵柱塞(20a-20d) 16d),使得液压流体通过相邻泵送孔的入口被抽吸到所述泵送室中,并且从所述泵送室泵送通过所述相邻泵送孔的输送端口。 驱动装置(140)包括用于在其行程的一部分期间临时停止至少一个泵柱塞(20a-20d)的装置。