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Operation control system of static pressure air suspension centrifugal refrigeration compressors

A technology of refrigeration compressors and centrifugal compressors, applied in engine control, pump control, mechanical equipment, etc., can solve problems such as increased pollution risk of ultra-high-speed oil system, and achieve the effect of eliminating human intervention

Inactive Publication Date: 2021-12-14
安徽润安思变能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a static pressure air suspension centrifugal refrigeration compressor operation control system, which is used to solve the problems that the traditional oil-lubricated bearings are difficult to withstand the ultra-high speed and the existence of the oil system leads to the increased risk of pollution

Method used

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  • Operation control system of static pressure air suspension centrifugal refrigeration compressors
  • Operation control system of static pressure air suspension centrifugal refrigeration compressors
  • Operation control system of static pressure air suspension centrifugal refrigeration compressors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] like figure 2 As shown, the startup process includes:

[0050] Step S1: According to the start-up command, first start the air bearing, open the liquid supply valve 1, set the liquid supply valve 1 to open for 5 seconds and then start the working medium pump 2, judge that the liquid level of the air supply tank 16 reaches the set value LTset1, and then open Electric heater 3;

[0051] Step S2: After judging that the pressure 15 of the air supply tank reaches the set value Pset1, open the air supply valve 4. At this time, as the air supplied to the bearing enters the compressor, the air bearing starts to enter the air floating state. In order to keep the air bearing working normally, It is necessary to monitor the liquid level 16 of the gas supply tank and the pressure 15 of the gas supply tank in real time. According to the difference between the liquid level 16 of the gas supply tank and the set value LTset01 as the input of the PID algorithm, the operating frequency...

Embodiment 2

[0059] like image 3 As shown, the variable working condition of the compressor mainly refers to the need to adjust the operating speed of the compressor as the heat load of the external system changes, so as to ensure the water supply temperature required by the external system, and at the same time make the compressor run in a stable, safe and efficient state. In addition, this process can realize fully adaptive and intelligent control and operation without human intervention.

[0060] The operation process of the compressor unit under variable working conditions includes:

[0061] The signal for the compressor to automatically sense changes in working conditions comes from the chilled water temperature 14 of the external system, and the value of the chilled water temperature 14 is marked as TE04. By judging whether the chilled water temperature 14 is within the set temperature range, it is determined whether the compressor speeds up or not. Decrease the speed. At this time...

Embodiment 3

[0066] like Figure 4 As shown, the security system of the compressor includes a compressor component status protection module, an anti-surge protection module, a motor operation protection module and a compressor operation protection module.

[0067] The compressor component status protection module monitors the status of all sensors, valves, electric heaters 3, pumps, permanent magnet motors 7 and other components, and feeds back to the PLC whether the status of each component is normal or faulty, as a basic protection; Component failure signal, that is, through PLC alarm and protection shutdown, reminding to troubleshoot;

[0068] The compressor anti-surge protection module judges whether it is at the risk of surge by comparing the ratio of the compressor discharge pressure 12 to the compressor intake pressure 10 with the value of the compressor surge risk line; that is, read (PT02 / PT01) is compared with the value of the surge risk line, if it exceeds the allowable limit,...

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Abstract

The invention belongs to the field of electrical control of air suspension centrifugal compressors, and particularly relates to an operation control system of static pressure air suspension centrifugal refrigeration compressors, the operation control system is used for solving the problems that a traditional oil-lubricated bearing is difficult to bear ultrahigh rotating speed and the pollution risk is increased due to the existence of an oil system. The operation control system comprises the two-stage centrifugal compressors, an air supply cooling system, an integrated control cabinet and a monitoring sensor, the two-stage centrifugal compressors comprise the first-stage compressor and the second-stage compressor, and a permanent magnet motor is arranged in the two-stage centrifugal compressor; and one-key starting and stopping, unattended operation and automatic variable-working-condition operation of a static pressure air suspension centrifugal refrigeration compressor unit are achieved, the automatic control system of the compressor is internally integrated, the compressor serves as a closed black box, integration with different external heat exchanger systems is easy to achieve, and the automatic control system is suitable for different application scenes.

Description

technical field [0001] The invention belongs to the electrical control field of air suspension centrifugal compressors, in particular to an operation control system of static pressure air suspension centrifugal refrigeration compressors. Background technique [0002] In the existing market, scroll compressors and screw compressors are mainly used as main engines in the field of small and medium-sized central air conditioners and heat pumps, while positive displacement compressors have inherent disadvantages of low efficiency, loud noise, and severe vibration; The large centrifugal compressors used in large water-cooled central air conditioners will encounter many problems after being miniaturized, including the sharp increase in the speed of the compressor after the unit is miniaturized, which makes it difficult for traditional oil-lubricated bearings to withstand ultra-high speeds; The existence of the system will also increase the risk of pollution and require a lot of man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00F04D27/02
CPCF04D27/00F04D27/001F04D27/003F04D27/004F04D27/008F04D27/0223F04D27/0292F05D2270/706F05D2270/334F05D2270/303
Inventor 陶加银黄峰张泽国
Owner 安徽润安思变能源技术有限公司
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