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    • 1. 发明申请
    • PRESSURE LIMITING IN HYDRAULIC SYSTEMS
    • 液压系统压力限制
    • WO2012154464A2
    • 2012-11-15
    • PCT/US2012036090
    • 2012-05-02
    • CATERPILLAR INCHARLOW RANDALL AHAND TIMOTHY LBRINKMAN JASON LBACON KEVIN A
    • HARLOW RANDALL AHAND TIMOTHY LBRINKMAN JASON LBACON KEVIN A
    • F15B13/044F15B13/02
    • F15B11/168F15B2211/30555F15B2211/6058F15B2211/653F15B2211/654
    • This disclosure provides for pressure limiting a hydraulic system (100, 200) to a desired pressure value by a particular circuit by controlling and closing the compensator when the desired pressure setting is achieved. Closing the compensator will reduced the pressure head and flow in the circuit resulting in improved efficiency. One illustrated embodiment of the disclosure provides a relief valve (30) in the pilot signal for a compensator. The method relates to limiting the pressure on an open side (202a) of the compensator, such that the pressure on the other side closes the compensator thereby limiting the pressure and also flow in the hydraulic circuit. In other words, the pressure on the open side (202a) is limited by the relief valve (30). Thus, the pressure on the other side increases thereby regulating the flow and pressure through the compensator. In another embodiment of the disclosure, instead of reducing the pressure on the open side (202a), the pressure on the closed side (202b) is increased, thereby controlling the flow and pressure of the hydraulic circuit. The pressure can be increased by a pump (12) or any other suitable mode.
    • 本公开提供了当实现期望的压力设定时,通过控制和关闭补偿器,通过特定的电路将液压系统(100,200)限制到期望的压力值。 关闭补偿器将减少电路中的压头和流量,从而提高效率。 本公开的一个示出的实施例提供了用于补偿器的导频信号中的安全阀(30)。 该方法涉及限制补偿器的开放侧(202a)上的压力,使得另一侧的压力关闭补偿器,从而限制压力并且还在液压回路中流动。 换句话说,开放侧(202a)的压力受到安全阀(30)的限制。 因此,另一侧的压力增加,从而调节通过补偿器的流量和压力。 在本公开的另一个实施例中,代替减小开口侧(202a)上的压力,封闭侧(202b)上的压力增加,从而控制液压回路的流量和压力。 压力可以通过泵(12)或任何其他合适的模式来增加。