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    DISPLACEMENT PUMP AND CONTROL SYSTEM
    4.
    发明申请
    DISPLACEMENT PUMP AND CONTROL SYSTEM 审中-公开

    公开(公告)号：US20180080442A1

    公开(公告)日：2018-03-22

    申请号：US15706374

    申请日：2017-09-15

    申请人： Wanner Engineering, Inc.

    发明人： Paul Davis ,  Mike Jaworsky

    IPC分类号： F04B49/06 ,  F04B17/03

    CPC分类号： F04B49/06 ,  F04B17/03 ,  F04B43/02 ,  F04B43/04 ,  F04B43/067 ,  F04B49/065 ,  F04B49/08 ,  F04B2203/0201 ,  F04B2203/0207 ,  F04B2205/05

    摘要： A pump system includes a positive displacement pump, such as a diaphragm pump, an electric motor directly coupled to the positive displacement pump, and a programmable controller configured to maintain a desired current to the electric motor. The programmable controller is adapted to sense the current to the motor and to maintain constant current. It has been found that constant current provides constant torque and constant torque achieves constant fluid discharge pressure from the pump. The programmable controller utilizes an absorbed power formula to determine the correct current to achieve the necessary torque for a desired fluid discharge pressure. The programmable controller includes a power saving mode with minimal current and the pump is “dead headed” with no flow. The system is operated with a method that maintains constant fluid discharge pressure as well as having a power saving mode.

    PUMP MONITORING METHOD
    6.
    发明申请
    PUMP MONITORING METHOD 审中-公开

    公开(公告)号：US20180045194A1

    公开(公告)日：2018-02-15

    申请号：US15550918

    申请日：2016-02-15

    申请人： Pulsar Process Measurement Limited

    发明人： Keith Victor Beard ,  Sang Tran

    IPC分类号： F04B49/02 ,  G05B23/02 ,  F04B17/03 ,  F04B49/06 ,  E03F5/22

    CPC分类号： F04B49/02 ,  E03F5/22 ,  F04B17/03 ,  F04B49/065 ,  F04B2203/0201 ,  F04B2205/02 ,  F04D15/0088 ,  F05D2260/80 ,  F05D2270/335 ,  G05B23/0283

    摘要： A system comprising: a reservoir (14) for holding a liquid; a pump (20) arranged to pump the liquid out of the reservoir (14) or into the reservoir (14); a level sensor (26) configured to detect the level of the liquid in the reservoir (14) and to generate level data; a current monitor (28) configured to monitor the current drawn by the pump (20) and to generate current data; and a controller (30) configured to: receive level data and determine the static head from the level data, and generate head data from the static head; receive first current and head data corresponding to the current drawn by the pump (20) as a function of the static head for a first period of operation of the pump (20); receive second current and head data corresponding to the current drawn by the pump (20) as a function of the static head for a second period of operation of the pump (20), wherein the second current and head data is recorded when the liquid in the reservoir (14) is between a first liquid level and a second liquid level, and wherein the first current and head data is recorded when the liquid in the reservoir (14) is between at least the first liquid level and the second liquid level; and process the first current and head data and the second current and head data to determine first difference data (PPI) representing the difference between the current drawn between the first liquid level and the second liquid level in the first period of operation and the second period of operation, the first difference data providing a pump performance indicator giving an indication of the condition of the pump.

    Hydraulically actuated diaphragm pumps
    8.
    发明授权
    Hydraulically actuated diaphragm pumps 有权

    公开(公告)号：US09845794B2

    公开(公告)日：2017-12-19

    申请号：US14049088

    申请日：2013-10-08

    申请人： Ingersoll-Rand Company

    发明人： Warren A. Seith ,  Aaron M. Crescenti

    IPC分类号： F04B9/04 ,  F04B43/02 ,  F04B43/067 ,  F04B49/06

    CPC分类号： F04B9/045 ,  F04B43/026 ,  F04B43/067 ,  F04B49/065 ,  F04B2201/0206 ,  F04B2201/1202 ,  F04B2203/0201

    摘要： A diaphragm pump may comprise a housing defining a first pumping chamber, a second pumping chamber, and a hydraulic fluid chamber, a first flexible diaphragm separating the first pumping chamber from the hydraulic fluid chamber, a second flexible diaphragm separating the second pumping chamber from the hydraulic fluid chamber, a rod mechanically linking the first flexible diaphragm and the second flexible diaphragm such that an expansion of one of the first and second flexible diaphragms exerts a contraction force on the other of the first and second flexible diaphragms, and a piston disposed within the hydraulic fluid chamber and configured to reciprocate to cause a hydraulic fluid contained within the hydraulic fluid chamber to alternately exert an expansion force on the first and second flexible diaphragms.