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1. 发明授权

US4024710A Load sensing hydraulic circuit having power matching means 失效
标题翻译：具有动力匹配装置的负载感测液压回路
公开(公告)号：US4024710A
公开(公告)日：1977-05-24
申请号：US670151
申请日：1976-03-25
申请人： Lester L. Zelle
发明人： Lester L. Zelle
IPC分类号： B62D11/18 , E02F9/22 , F15B11/17 , F16H61/46 , F16H61/47 , F15B13/09 , F16H39/46
CPC分类号： B62D11/183 , E02F9/2232 , E02F9/2239 , E02F9/2292 , E02F9/2296 , F15B11/17 , F16H61/46 , F16H61/47 , F15B2211/20553 , F15B2211/20576 , F15B2211/30505 , F15B2211/30535 , F15B2211/3133 , F15B2211/351 , F15B2211/4053 , F15B2211/6054 , F15B2211/65 , F15B2211/71 , F15B2211/7142
摘要： A load sensitive hydraulic circuit for material handling equipment is energized by a prime mover. The hydraulic circuit includes variable displacement pumps coupled to the prime mover and having pressure and flow compensating control means for varying the volumetric output. Each pump is connected to a valve bank which controls various hydraulic actuators of the material handling equipment. Load pressure feedback is provided to the pump compensators for establishing pump flows to operate the actuators at a fixed pressure differential in excess of load pressure. The valve banks contain pressure compensated valves for providing desired fluid flow rates and speeds in the hydraulic actuators. Means are provided to sense reductions in the prime mover speed resulting from excessive hydraulic loads. The means is connected to the pump compensators for simultaneously adjusting the volumetric output of the hydraulic pumps at the preselected pressure differential over the load pressure and power demands on the prime mover so that demands on the prime mover are matched to its available power output.
摘要翻译：用于材料处理设备的负载敏感液压回路由原动机通电。液压回路包括耦合到原动机的可变排量泵，并具有用于改变体积输出的压力和流量补偿控制装置。每个泵连接到阀组，其控制材料处理设备的各种液压致动器。负载压力反馈被提供给泵补偿器，用于建立泵流量以在超过负载压力的固定压力差下操作致动器。阀组包含压力补偿阀，用于在液压致动器中提供所需的流体流速和速度。提供装置以感测由于过大的液压负载而导致的原动机速度的降低。该装置连接到泵补偿器，用于在预先选择的压力差上，在原动机上的负载压力和功率需求上同时调节液压泵的体积输出，使得对原动机的要求与其可用功率输出相匹配。

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