Control method, device and system for operation boundary of rotating fluid machine
A technology of fluid machinery and control methods, applied in pump control, mechanical equipment, machines/engines, etc., can solve problems such as abnormal shutdown of equipment, inability to prevent surge, and inability to achieve precise control, so as to prevent abnormal shutdown of equipment , Precise control and simple control method
Active Publication Date: 2020-11-24
北京智拓博科技有限公司
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Problems solved by technology
Therefore, controlling the operating boundary of the equipment according to the rotational speed cannot achieve precise control, which will lead to abnormal shutdown of the equipment or failure to prevent the occurrence of surge
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[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0048] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances ...
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The invention provides a control method, device and system for a operation boundary of a rotating fluid machine. The control method comprises the steps of acquiring air pressure of the position wherethe rotating fluid machine is located, and generating ambient pressure data; generating performance curve data based on the ambient pressure data and preset flow data, wherein the flow data in the performance curve data is an independent variable, and the performance curve data is a dependent variable; determining a left boundary fitting constant and a right boundary fitting constant; acquiring air pressure data of the current time, and determining the value of the left boundary fitting constant and the value of the right boundary fitting constant; and acquiring flow data, and outputting prompt data when the flow data is beyond the interval between the value of the left boundary fitting constant and the value of the right boundary fitting constant. According to the control method, the operation range of equipment can be controlled strictly, and the equipment is prevented from being shut down abnormally or damaged due to occurrence of surge. The control method is simple, and the operation range of the rotating fluid machine can be accurately controlled as long as several fitting constants are obtained.
Description
technical field [0001] The invention relates to automatic control technology, in particular to a method, device and system for controlling the operating boundary of a rotary fluid machine. Background technique [0002] The operating boundary of rotating fluid machinery includes the left boundary of surge and the right boundary of clogging, corresponding to surge flow and clogging flow respectively. The left boundary of surge means that when the flow rate decreases to a certain value, due to the deterioration of the internal flow of the impeller, it cannot work on the gas normally, resulting in the outlet pressure being lower than the resistance of the pipe network, and the airflow oscillation will be caused between the equipment and the pipe network system. The right boundary of blockage means that when the mechanical back pressure of the fluid or the resistance of the pipe network continues to decrease, the flow rate of the equipment and the airflow velocity in the channel ...
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IPC IPC(8): F04D27/00F04D27/02
CPCF04D27/00F04D27/02F04D27/001F04D27/008
Inventor 李记东陈军
Owner 北京智拓博科技有限公司