Liquid ring pump control
AssigneeEdwards Technologies Vacuum Engineering (Qingdao) Company Limited
InventorsAndries Daniel Jozef De Bock, Xin Dai, Xibo Liu
Life of this patent
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Abstract
A system comprising: a liquid ring pump (10) comprising: a chamber (102); a suction inlet; an exhaust outlet; and an operating liquid inlet; a gas line (36) coupled to the liquid ring pump (10); a valve (8) disposed on the gas line (36); a first sensor (81) configured to measure a first parameter of the inlet fluid; a second sensor (82) configured to measure a second parameter of either the operating liquid, the exhaust fluid, or a fluid within the chamber; and a controller (20) configured to: determine a vapour pressure of the operating liquid using the second parameter; and control operation of the valve (8) based on the first parameter and the vapour pressure.
Claims15
A system comprising:
- a liquid ring pump comprising:
- a chamber;
- a suction inlet;
- an exhaust outlet;
- and
- an operating liquid inlet;
- wherein
- the liquid ring pump is configured to:
- pump an inlet fluid into the chamber via the suction inlet;
- pump an exhaust fluid out of the chamber via the exhaust outlet;
- and
- receive an operating liquid into the chamber via the operating liquid inlet;
- a gas line coupled to the liquid ring pump such that a gas may flow into the chamber of the liquid ring pump via the gas line;
- a valve disposed on the gas line;
- a first sensor configured to measure a first parameter of the inlet fluid;
- a second sensor configured to measure a second parameter of a fluid selected from the group of fluids consisting of the operating liquid, the exhaust fluid, and a fluid within the chamber;
- and
- a controller configured to:
- determine a vapour pressure of the operating liquid using the measurement of the second parameter;
- and
- control operation of the valve based on the measurement of the first parameter and the determined vapour pressure.
A control method for controlling a system, the system comprising a liquid ring pump, a gas line, and a valve disposed on the gas line, wherein the liquid ring pump comprises a chamber, a suction inlet, an exhaust outlet, and an operating liquid inlet, the liquid ring pump is configured to pump an inlet fluid into the chamber via the suction inlet, pump an exhaust fluid out of the chamber via the exhaust outlet, and receive an operating liquid into the chamber via the operating liquid inlet, and the gas line is coupled to the liquid ring pump such that a gas may flow into the chamber of the liquid ring pump via the gas line, the method comprising:
- measuring a first parameter of the inlet fluid;
- measuring a second parameter of a fluid selected from the group of fluids consisting of the operating liquid, the exhaust fluid, and a fluid within the chamber;
- determining a vapour pressure of the operating liquid using the measurement of the second parameter;
- and
- controlling operation of the valve based on the measurement of the first parameter and the determined vapour pressure.
Dependencies are inferred from the claim text.