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A Method of Simultaneously Controlling Compressor Inlet and Exhaust Pressure

A technology of intake pressure and exhaust pressure, applied in pump control, mechanical equipment, machine/engine, etc., can solve problems such as the inability to adjust the linkage of compressor units, the inability to obtain a stable operating state, and the lack of calculation methods for displacement adjustment. Achieve the effects of wide application range, stable operation and reduced difficulty

Active Publication Date: 2022-04-08
SINOPEC OILFIELD EQUIP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing displacement adjustment of the compressor unit cannot realize the simultaneous adjustment of the intake and exhaust pressure of the compressor unit. It can only adjust the intake pressure or exhaust pressure separately, and then estimate it according to the adjusted displacement parameters. For the next adjustment, the efficiency is low, and there is no fixed displacement adjustment calculation method, and it is often impossible to obtain a stable operating state after multiple adjustments

Method used

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  • A Method of Simultaneously Controlling Compressor Inlet and Exhaust Pressure

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Embodiment 1

[0064] A method for simultaneously controlling the inlet and outlet pressures of a compressor, comprising the steps of:

[0065] Step S1: The main motor of the compressor unit is a variable frequency motor, and the compressor is connected with a bypass flow regulating valve; electrically connect the variable frequency motor of the compressor and the bypass flow regulating valve to the control system; set the intake pressure of the compressor unit is P3, and the exhaust pressure is P4;

[0066] Step S2: Set the compressor intake pressure target value P1 and discharge pressure target value P2 within the normal operating range of the compressor, assign values ​​to P1 and P2, set P1=0.4MPa, P2=2.0 MPa, and upload the data to the controller system;

[0067] Step S3: Set the maximum value M of the intake pressure and the minimum value N of the intake pressure of the unit, as well as the maximum value J of the exhaust pressure and the minimum value K of the exhaust pressure of the u...

Embodiment 2

[0089] A method for simultaneously controlling the inlet and outlet pressures of a compressor, comprising the steps of:

[0090] Step S1: The main motor of the compressor unit is a variable frequency motor, and the compressor is connected with a bypass flow regulating valve; electrically connect the variable frequency motor of the compressor and the bypass flow regulating valve to the control system; set the intake pressure of the compressor unit is P3, and the exhaust pressure is P4;

[0091] Step S2: Set the compressor intake pressure target value P1 and discharge pressure target value P2 within the normal operating range of the compressor, assign values ​​to P1 and P2, set P1=0.2MPa, P2=2.3 MPa, and upload the data to the control system;

[0092] Step S3: Set the maximum value M of the intake pressure and the minimum value N of the intake pressure of the unit, as well as the maximum value J of the exhaust pressure and the minimum value K of the exhaust pressure of the unit...

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Abstract

The invention discloses a method for controlling the inlet and outlet pressures of compressors at the same time, which replaces the existing method for adjusting the displacement of compressor units in three ways: clearance adjustment, driver speed adjustment and bypass flow adjustment valve adjustment. The intake and exhaust pressure comparison parameters △E and △T are introduced to represent the deviation between the intake and exhaust pressure in the actual operation of the unit and the target value, and the comparison parameters with large deviations are continuously reduced through the iterative algorithm, that is, the control system adjusts the bypass The opening of the flow rate regulating valve and the speed of the main motor make the intake and exhaust pressure of the unit in actual operation close to the target value, and finally keep the same, so as to achieve the purpose of simultaneously controlling the intake and exhaust pressure of the unit.

Description

technical field [0001] The invention belongs to the field of automatic adjustment of compressors, and more specifically relates to a method for simultaneously controlling the inlet and outlet pressures of compressors. Background technique [0002] The inlet and exhaust pressure of the compressor is closely related to the displacement of the unit. If the displacement of the compressor unit is greater than the required displacement, the inlet pressure of the unit will decrease and the exhaust pressure will increase; if the displacement of the compressor is less than the required displacement, It will cause the intake pressure of the unit to increase and the exhaust pressure to decrease. [0003] The displacement of the compressor is generally carried out in three ways: clearance adjustment, driver speed adjustment and bypass flow adjustment valve adjustment; through the adjustment of the unit displacement, the control of the intake and exhaust pressure of the unit is realized....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06F04B49/02F04B49/08F04B49/10F04B49/20F04B49/24
CPCF04B49/065F04B49/08F04B49/10F04B49/20F04B49/24F04B49/02
Inventor 陈光亮裴秀丽苗帅龚贻斌郑鹏举翁学英侯小兵黄远明王有朋
Owner SINOPEC OILFIELD EQUIP CORP