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公开(公告)号:US4317466A
公开(公告)日:1982-03-02
申请号:US136391
申请日:1980-04-01
申请人: Akinori Ikeda , Fuyuki Nagai , Takashi Okuno
发明人: Akinori Ikeda , Fuyuki Nagai , Takashi Okuno
IPC分类号: B66D1/44 , E02F9/22 , F15B11/02 , F15B11/028 , F15B11/044 , F15B13/02
CPC分类号: B66D1/44 , E02F9/2221 , F15B11/02 , F15B11/0445 , F15B2211/3051 , F15B2211/324 , F15B2211/40515 , F15B2211/41581 , F15B2211/473 , F15B2211/50518 , F15B2211/50536 , F15B2211/5151 , F15B2211/5154 , F15B2211/528 , F15B2211/55 , F15B2211/57 , F15B2211/6309 , F15B2211/665 , F15B2211/7058 , Y10T137/2605 , Y10T137/87177
摘要: A hydraulic drive circuit for a load-handling machine such as hydraulic crawler crane, shovel or the like in which the maximum output pressure of the circuit is determined by a main relief valve provided on the delivery side of a hydraulic pump. The drive circuit is capable of producing a surge of power or output by automatically increasing the relief pressure of the main relief valve above a rated pressure of the circuit for a short time period of about a few seconds, when required for extracting an implanted pile, for pulling a bucket which is caught on a large stone, or for getting a machine out of a muddy spot. At the end of the predetermined time period, the circuit pressure is automatically returned to the level of the rated pressure. The surge output is from 130% to 150% of the rated output but allows use of hydraulic components or an engine of a capacity designed for the rated output without troubles or engine stops.
摘要翻译: 用于液压履带式起重机,铲式等装载机的液压驱动电路,其中电路的最大输出压力由设置在液压泵的输出侧的主溢流阀确定。 驱动电路能够通过在需要提取植入的桩时自动将主安全阀的溢流压力自动地增加到电路的额定压力大约几秒的短时间段以下来产生浪涌, 用于拉一个被抓在大石头上的桶,或者将机器从泥泞的地方拿出来。 在预定时间段结束时,回路压力自动返回到额定压力的水平。 浪涌输出从额定输出的130%到150%,但允许使用液压部件或设计用于额定输出的容量的发动机,无需任何故障或发动机停止。