CN106979640B - Control method of helium screw compressor - Google Patents
Control method of helium screw compressor Download PDFInfo
- Publication number
- CN106979640B CN106979640B CN201710158741.6A CN201710158741A CN106979640B CN 106979640 B CN106979640 B CN 106979640B CN 201710158741 A CN201710158741 A CN 201710158741A CN 106979640 B CN106979640 B CN 106979640B
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- China
- Prior art keywords
- screw compressor
- helium
- helium screw
- compressor
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000001307 helium Substances 0.000 title claims abstract description 155
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 155
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 155
- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000000977 initiatory effect Effects 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000000739 chaotic effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
- F25B1/047—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/026—Compressor control by controlling unloaders
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
A helium screw compressor control method comprises a compressor loading and unloading operation method, a compressor frequency control method and a compressor unit protection method. The method mainly means that in the operation process of a compressor unit, the suction pressure or the exhaust pressure of the compressor unit is not used as a control parameter for loading and unloading the compressor, but the loading and unloading of the compressor unit are controlled sequentially. The frequency control method of the compressor is used for controlling the frequency of the compressor in the whole operation process of the cryogenic system, thereby controlling the flow rate of helium in the helium cryogenic system. The compressor unit protection method is used for protecting the compressor unit and preventing unit equipment such as a main machine and the like from being damaged in an emergency. This ensures reliable operation of the entire helium cryogenic system.
Description
Technical field
The invention belongs to refrigeration technology field more particularly to a kind of control methods of Helium screw compressor.
Background technology
The development of Helium screw compressor is as the development of large-scale cryogenic system gets up.In recent years big
Large-scale cryogenic system has quick development at home under the promotion of Scientific Engineering.Helium oil-flooded screw compressors are also from most
Just domestic several are slowly provided with a certain amount of scale.Helium screw compressor is compressed as a kind of oil-flooded screw
Machine is helium work with the maximum difference of helical-lobe compressor of common air injection type helical-lobe compressor and conventional refrigerant working medium
In the easy leakage of matter and the process control method of entire Compressor Group.Conventional air screw compressor and refrigerant compression
Machine all uses identical control method, but Helium screw compressor is different because Helium screw compressor according to it is normal
The identical control method of helical-lobe compressor is advised, will mutually conflict with the control method of entire large-scale cryogenic system, cause to control
Confusion is stopped so as to cause whole system, control failure.Therefore, Helium screw compressor needs exploitation to be adapted to large-scale helium low
The control method of warm system ensures the reliable operating of entire large-scale cryogenic system.
Invention content
In consideration of it, it is necessary to provide a kind of Helium screw compressor control method being adapted to large-scale cryogenic system, it can
To ensure the reliability service of entire cryogenic system.
A kind of control method of Helium screw compressor, includes the following steps：
After starting Helium screw compressor by the Central Control Room of cryogenic system, the Helium screw compressor starts by 0Hz
The Helium screw compressor initiation culture is run to, and stable operation is carried out with the initiation culture, wherein the startup frequency
Rate is remotely located by the Central Control Room；
During the Helium screw compressor stable operation, when the flow in the cryogenic system needs to improve,
The instruction of raising frequency is sent out from the Central Control Room to the Helium screw compressor, the Helium screw compressor is required according to instruction
Promote operating frequency, the Helium screw compressor load operating；
During the Helium screw compressor stable operation, when the flow in the cryogenic system needs to reduce,
The instruction of frequency reducing is sent out from the Central Control Room to the Helium screw compressor, the Helium screw compressor is required according to instruction
Reduce operating frequency, the Helium screw compressor unloading operation；
When the Helium screw compressor is when needing to shut down, the Central Control Room sends out drop to the Helium screw compressor
The instruction of the low Helium screw compressor frequency, the Helium screw compressor reduce frequency until the helium according to instruction
The operating frequency of gas helical-lobe compressor is stablized in the initiation culture, and then, the Central Control Room can be to the helium screw compression
Machine sends out halt instruction, and the Helium screw compressor is according to instruction stop.
In one of the embodiments, the Helium screw compressor receive after halt instruction hard stop or according to
The running protection technological requirement of the Helium screw compressor, is shut down by the Helium screw compressor in preset time.
In one of the embodiments, in the cryogenic system operational process, the Helium screw compressor exhaust
When pressure is more than rated operating pressure, the frequency of the Helium screw compressor is first reduced, until the Helium screw compressor
Pressure at expulsion is restored to rated discharge pressure or less.
Further include following steps in one of the embodiments,：When the frequency of the reduction Helium screw compressor is to most
When low, when the pressure at expulsion of the Helium screw compressor cannot still be restored to rated discharge pressure or less, then institute out of service
State Helium screw compressor.
Safety valve is additionally provided with to protect in the Helium screw compressor machine set system in one of the embodiments,
The safety of the Helium screw compressor unit various components inside.
Pressure difference is considered to protect the operational safety of the cryogenic system by the way that oil is arranged in one of the embodiments,.
In one of the embodiments, by the way that delivery temperature is arranged to protect the operational safety of the cryogenic system.
In one of the embodiments, by the way that current of electric is arranged to protect the operational safety of the cryogenic system.
Different from conventional helical-lobe compressor control method, above-mentioned Helium screw compressor control method is adapted to large size
Cryogenic system, for Helium screw compressor unit itself, the startup of Helium screw compressor, load operating all use
Single sequential control.The frequency of Helium screw compressor transfers to the Central Control Room of large-scale cryogenic system to carry out remote control, system
The operating characteristic of one control Helium screw compressor, can ensure the reliability service of entire cryogenic system in this way.
Description of the drawings
Fig. 1 is the flow chart of the control method of the Helium screw compressor of an embodiment.
Specific implementation mode
In order to make the objectives, technical solutions, and advantages of the present invention be more clear, with reference to the accompanying drawings and embodiments, to this hair
It is bright to be further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
Referring to Fig. 1, the control method of the Helium screw compressor of an embodiment, includes the following steps：
S10, by cryogenic system Central Control Room start Helium screw compressor after, Helium screw compressor starts by 0Hz
Helium screw compressor initiation culture is run to, and stable operation is carried out with initiation culture, wherein initiation culture is remote by Central Control Room
Journey is arranged.
During S20, Helium screw compressor stable operation, when the flow in cryogenic system needs to improve, in
Control room sends out the instruction of raising frequency to Helium screw compressor, and Helium screw compressor requires to promote operating frequency, helium according to instruction
Gas helical-lobe compressor load operating.
During S30, Helium screw compressor stable operation, when the flow in cryogenic system needs to reduce, in
Control room sends out the instruction of frequency reducing to Helium screw compressor, and Helium screw compressor requires to reduce operating frequency, helium according to instruction
The unloading operation of gas helical-lobe compressor.
S40, when Helium screw compressor need shut down when, Central Control Room to Helium screw compressor send out reduce helium spiral shell
Frequency is reduced the operating frequency until Helium screw compressor according to instruction by the instruction of bar compressor frequency, Helium screw compressor
Rate is stablized in initiation culture, and then, Central Control Room can send out halt instruction to Helium screw compressor, Helium screw compressor according to
Instruction stop.
In S40, Helium screw compressor receives after halt instruction hard stop or by Helium screw compressor pre-
If being shut down in the time.
In S40, after Helium screw compressor receives halt instruction, according to the running protection technique of Helium screw compressor
It is required that can be shut down within the preset time.Preset time is by Helium screw compressor producer sets itself.
The pressure of inspiration(Pi) of above-mentioned Helium screw compressor operating, pressure at expulsion Helium screw compressor safe handling model
In enclosing, determined by entire cryogenic system, rather than by the frequency of pressure of inspiration(Pi) or pressure at expulsion and Helium screw compressor
It is adjusted using PID between rate.
Specifically, the control method of above-mentioned Helium screw compressor, further includes following steps：
S50, in cryogenic system operational process, Helium screw compressor pressure at expulsion be more than rated operating pressure when,
The frequency for first reducing Helium screw compressor, until the pressure at expulsion of Helium screw compressor is restored to rated discharge pressure or less.
S50 further comprises operating as follows：When reduce Helium screw compressor frequency to it is minimum when, helium screw rod pressure
When the pressure at expulsion of contracting machine cannot still be restored to rated discharge pressure or less, then Helium screw compressor out of service.
Safety valve is additionally provided in Helium screw compressor machine set system to protect inside Helium screw compressor unit
The safety of all parts.
In addition to above-mentioned protection, in the control method of above-mentioned Helium screw compressor, pressure difference, exhaust temperature are considered by the way that oil is arranged
The correlation safeguard measure such as degree, current of electric is to protect the operational safety of cryogenic system.Oil considers pressure difference, delivery temperature, motor electricity
Stream etc. can be arranged by Central Control Room, can also be configured by the local control interface of compressor.
The pressure of inspiration(Pi) conservation suggestion of Helium screw compressor is completed by the entire control method of large-scale cryogenic system.
Above-mentioned Helium screw compressor control method includes load and unloading operation method, the helium of Helium screw compressor
Gas helical-lobe compressor control method for frequency, Helium screw compressor generator protection method etc..
The load of Helium screw compressor and unloading operation method, being the key that Helium screw compressor unit can run
Method operates the load of Helium screw compressor and unloading for realizing large-scale cryogenic system Central Control Room.This method is main
Refer in Compressor Group operational process, not using the pressure of inspiration(Pi) of Helium screw compressor unit or pressure at expulsion as helium
Helical-lobe compressor adds the control parameter of unloading, but uses the load and unloading of sequential control Helium screw compressor unit.Institute
The sequential control of meaning is exactly to give directions to hit startup, and compressor frequency is raised to the initiation culture of setting, and the pressure at expulsion of compressor is gradual
It increases, not any mutual restriction or control logic between parameters therein.
The control method for frequency of Helium screw compressor is the key method of Helium screw compressor unit flow control,
Frequency for controlling Helium screw compressor in entire cryogenic system operation process, to control helium in cryogenic system
Flow.It requires first, needs to start with certain frequency when Helium screw compressor starts.Secondly, in helium screw compression
In machine operation process, characteristic parameter that the central control system of large-scale cryogenic system is operated according to entire cryogenic system controls helium
The variation of screw compression unit frequency, without the control system by Helium screw compressor itself to Helium screw compressor
Frequency is controlled.To realize the coordination of entire cryogenic system control system.
Helium screw compressor generator protection method is for protecting Helium screw compressor unit itself, for preventing tight
The damage of the unit equipments such as host in the case of urgency.
The control of conventional helical-lobe compressor unit is all the pressure at expulsion or pressure of inspiration(Pi) masterpiece using Compressor Group
Point in order to control carries out PID control according to pressure at expulsion or pressure of inspiration(Pi) to the frequency of compressor, and this method is for large-scale helium
It is fatal for cryogenic system, it is easy to the control hazard for leading to the control and entire cryogenic system of compressor itself, to
Cause control chaotic so that entire cryogenic system parking.It is different from conventional helical-lobe compressor control method, above-mentioned helium screw rod
Compressor control method is adapted to large-scale cryogenic system, for Helium screw compressor unit itself, helium screw rod pressure
The startup of contracting machine, load operating all use single sequential control.The frequency of Helium screw compressor transfers to large-scale helium low temperature system
The Central Control Room of system carries out remote control, is uniformly controlled the operating characteristic of Helium screw compressor, can ensure that entire helium is low in this way
The reliability service of warm system.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (8)
1. a kind of control method of Helium screw compressor, which is characterized in that include the following steps：
After starting Helium screw compressor by the Central Control Room of cryogenic system, the Helium screw compressor starts to be run by 0Hz
To the Helium screw compressor initiation culture, and with the initiation culture carry out stable operation, wherein the initiation culture by
The Central Control Room is remotely located；
During the Helium screw compressor stable operation, when the flow in the cryogenic system needs to improve, by institute
The instruction that Central Control Room sends out raising frequency to the Helium screw compressor is stated, the Helium screw compressor requires to be promoted according to instruction
Operating frequency, the Helium screw compressor load operating；
During the Helium screw compressor stable operation, when the flow in the cryogenic system needs to reduce, by institute
The instruction that Central Control Room sends out frequency reducing to the Helium screw compressor is stated, the Helium screw compressor requires to reduce according to instruction
Operating frequency, the Helium screw compressor unloading operation；
When the Helium screw compressor is when needing to shut down, the Central Control Room is sent out to the Helium screw compressor reduces institute
The instruction of Helium screw compressor frequency is stated, the Helium screw compressor reduces frequency until the helium spiral shell according to instruction
The operating frequency of bar compressor is stablized in the initiation culture, and then, the Central Control Room can be sent out to the Helium screw compressor
Go out halt instruction, the Helium screw compressor is according to instruction stop.
2. the control method of Helium screw compressor as described in claim 1, which is characterized in that the Helium screw compressor
It receives hard stop after halt instruction or is shut down in preset time by the Helium screw compressor.
3. the control method of Helium screw compressor as described in claim 1, which is characterized in that when the cryogenic system is transported
During row, when the Helium screw compressor pressure at expulsion is more than rated operating pressure, the helium screw compression is first reduced
The frequency of machine, until the pressure at expulsion of the Helium screw compressor is restored to rated discharge pressure or less.
4. the control method of Helium screw compressor as claimed in claim 3, which is characterized in that further include following steps：When
Reduce the frequency of the Helium screw compressor to it is minimum when, the pressure at expulsion of the Helium screw compressor cannot be still restored to
When below rated discharge pressure, then the Helium screw compressor out of service.
5. the control method of Helium screw compressor as described in claim 1, which is characterized in that the Helium screw compressor
Safety valve is additionally provided in machine set system to protect the safety of the Helium screw compressor unit various components inside.
6. the control method of Helium screw compressor as described in claim 1, which is characterized in that by be arranged oil consider pressure difference with
Protect the operational safety of the cryogenic system.
7. the control method of Helium screw compressor as described in claim 1, which is characterized in that by be arranged delivery temperature with
Protect the operational safety of the cryogenic system.
8. the control method of Helium screw compressor as described in claim 1, which is characterized in that by be arranged current of electric with
Protect the operational safety of the cryogenic system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710158741.6A CN106979640B (en) | 2017-03-16 | 2017-03-16 | Control method of helium screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710158741.6A CN106979640B (en) | 2017-03-16 | 2017-03-16 | Control method of helium screw compressor |
Publications (2)
| Publication Number | Publication Date |
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| CN106979640A CN106979640A (en) | 2017-07-25 |
| CN106979640B true CN106979640B (en) | 2018-10-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710158741.6A Active CN106979640B (en) | 2017-03-16 | 2017-03-16 | Control method of helium screw compressor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112460770B (en) * | 2020-11-20 | 2022-07-15 | 珠海格力电器股份有限公司 | Multi-module unit and control method and device thereof, storage medium and processor |
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| JP2007085360A (en) * | 1996-02-19 | 2007-04-05 | Hitachi Industrial Equipment Systems Co Ltd | Method for operating screw compressor |
| CN101086251A (en) * | 2006-06-06 | 2007-12-12 | 乐金电子(天津)电器有限公司 | Air conditioner compressor system and its control method |
| CN101603751A (en) * | 2009-07-15 | 2009-12-16 | 北京科技大学 | A kind of frequency conversion energy-saving control method of refrigeration system |
| JP2010185458A (en) * | 1996-02-19 | 2010-08-26 | Hitachi Industrial Equipment Systems Co Ltd | Method of operating screw compressor |
| CN101839230A (en) * | 2009-03-18 | 2010-09-22 | 中国科学院理化技术研究所 | Thermal compressor system |
| CN104047841A (en) * | 2013-03-12 | 2014-09-17 | 住友重机械工业株式会社 | Cryopump system, method of operating the same, and compressor unit |
-
2017
- 2017-03-16 CN CN201710158741.6A patent/CN106979640B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007085360A (en) * | 1996-02-19 | 2007-04-05 | Hitachi Industrial Equipment Systems Co Ltd | Method for operating screw compressor |
| JP2010185458A (en) * | 1996-02-19 | 2010-08-26 | Hitachi Industrial Equipment Systems Co Ltd | Method of operating screw compressor |
| JP2002235674A (en) * | 2001-02-07 | 2002-08-23 | Honda Motor Co Ltd | Method for operating a plurality of compressors |
| CN101086251A (en) * | 2006-06-06 | 2007-12-12 | 乐金电子(天津)电器有限公司 | Air conditioner compressor system and its control method |
| CN101839230A (en) * | 2009-03-18 | 2010-09-22 | 中国科学院理化技术研究所 | Thermal compressor system |
| CN101603751A (en) * | 2009-07-15 | 2009-12-16 | 北京科技大学 | A kind of frequency conversion energy-saving control method of refrigeration system |
| CN104047841A (en) * | 2013-03-12 | 2014-09-17 | 住友重机械工业株式会社 | Cryopump system, method of operating the same, and compressor unit |
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| CN106979640A (en) | 2017-07-25 |
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Effective date of registration: 20210727 Address after: 1407, 14th floor, building 51, 63 Zhichun Road, Haidian District, Beijing 100083 Patentee after: Beijing Zhongke Fu Hai Low Temperature Technology Co.,Ltd. Address before: No. 29 East Zhongguancun Road, Haidian District, Beijing 100190 Patentee before: Technical Institute of Physics and Chemistry Chinese Academy of Sciences |
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