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    • 3. 发明授权
    • Gas separation control in a centrifugal pump/vacuum pump
    • 离心泵/真空泵中的气体分离控制
    • US6120252A
    • 2000-09-19
    • US163387
    • 1998-09-30
    • Voitto ReponenReijo VesalaVesa Vikman
    • Voitto ReponenReijo VesalaVesa Vikman
    • F04D7/04F04B23/14F04C19/00
    • F04D7/045F05B2210/132
    • A centrifugal and vacuum pump combination in which the impeller of a centrifugal pump is disposed on the same shaft as a rotor of the vacuum pump, with a gas outlet extending between the centrifugal and vacuum pumps, is operated by positively controlling the flow of gas passing through the gas outlet duct, for example by changing the effective cross-sectional flow area of the outlet duct. The fluent material handled by the pump is preferably a cellulose fiber slurry having a solids consistency of between about 6-15%. The control can be effected automatically in response to solids consistency, inlet pressure, and/or gas content of the slurry being pump. The vacuum pump housing includes an eccentric inner wall, and operation of the pump may be primarily controlled by moving the vacuum pump housing.
    • 一种离心泵和真空泵组合,其中离心泵的叶轮设置在与真空泵的转子相同的轴上,在离心泵和真空泵之间延伸出气体出口,通过积极地控制气体通过的流动 通过气体出口管道,例如通过改变出口管道的有效横截面流动面积。 由泵处理的流动材料优选为具有约6-15%之间的固体稠度的纤维素纤维浆料。 控制可以响应于泵的浆料的固体一致性,入口压力和/或气体含量而自动实现。 真空泵壳体包括偏心内壁,并且可以主要通过移动真空泵壳体来控制泵的操作。
    • 6. 发明授权
    • Controlling operation of a centrifugal pump
    • 控制离心泵的运行
    • US4435193A
    • 1984-03-06
    • US439600
    • 1982-11-05
    • Johan E. GullichsenEsko HarkonenToivo NiskanenJaakko KujalaVoitto Reponen
    • Johan E. GullichsenEsko HarkonenToivo NiskanenJaakko KujalaVoitto Reponen
    • B01D19/00D21D5/26F04D7/04
    • F04D7/045B01D19/0057D21D5/26F05B2210/132
    • The operation of a centrifugal pump which pumps a liquid or suspension (e.g. 8-12 percent consistency) containing gas is controlled to minimize pump power consumption, or to vary the pump flow rate. The suspension is rotated within the pump so that a gas bubble is created at a central part of the pump, and gas is discharged from the gas bubble, at a gas discharge pressure. The differential pressure between the suspension inlet and the gas discharge is determined, and the head and/or discharge flow rate of the pump are controlled by controlling the differential pressure so determined. The discharge flow rate may be maintained constant utilizing a control valve and flow meter in the pump discharge line, in which case controlling the discharge of gas from the gas bubble controls the head, and minimizes power consumption for a given flow rate. Alternatively the flow rate is controlled by controlling the gas discharge, with no control valve in the pump discharge line being provided.
    • 控制泵送含有气体的液体或悬浮液(例如8-12%稠度)的离心泵的操作以最小化泵功率消耗或改变泵的流量。 悬浮液在泵内旋转,使得在泵的中心部分产生气泡,气体在气体排放压力下从气泡排出。 确定悬浮液入口和气体放电之间的压差,并且通过控制如此确定的压差来控制泵的头部和/或排出流量。 利用泵排出管线中的控制阀和流量计,排出流量可以保持恒定,在这种情况下控制气泡的气体排放控制头部,并且使给定流量下的功率消耗最小化。 或者,通过控制气体排放来控制流量,而不设置泵排出管路中的控制阀。