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    • 10. 发明授权
    • Control apparatus of variable delivery pump
    • 变送泵控制装置
    • US4930992A
    • 1990-06-05
    • US408218
    • 1989-09-18
    • Kunihiko TakeuchiYoshisuke AkitaOsamu Hayakawa
    • Kunihiko TakeuchiYoshisuke AkitaOsamu Hayakawa
    • F04B49/06G05D7/06G05D16/20
    • G05D16/2066F04B49/06G05D7/0688
    • A control load such as a cylinder or the like is driven at a constant speed by controlling the flow rate of a variable delivery pump. The control mode is switched to the pressure control to keep the stop pressure constant on the basis of an increase in pressure when the control load stops. A remaining delivery amount which will be necessary to raise the delivery pressure to an object stop pressure when the load stops and an excess delivery volume due to the operation time lag when it is assumed that the delivery by the pump is stopped at the present time are predicted. When they coincide, the delivery amount of the pump is set to zero and the control mode is switched to the pressure control. On the other hand, the product of a load volume and a fluid compressibility is calculated from the increase in pressure when the load stops. The feedback gain of the pressure control is controlled on the basis of the calculated value of this product. Further, the pressure difference and the designated flow rate are compared and either smaller one of them is always set to the designated value of the flow control.
    • 通过控制可变输送泵的流量,以恒定的速度驱动诸如气缸等的控制负载。 控制模式切换到压力控制,以便在控制负载停止时基于压力增加来保持停止压力恒定。 当假设当前停止泵的输送时,在负载停止时将输送压力提高到物体停止压力以及由于操作时间延迟的过量输送量所需的剩余输送量是: 预料到的。 当它们重合时,泵的输送量被设置为零,并且将控制模式切换到压力控制。 另一方面,当负载停止时,从压力的增加计算负载体积和流体压缩性的乘积。 基于该产品的计算值控制压力控制的反馈增益。 此外,比较压力差和指定的流量,并且将其中的较小的一个总是设置为流量控制的指定值。