CN205478235U - Reciprocating compressor tolerance governing system - Google Patents
Reciprocating compressor tolerance governing system Download PDFInfo
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- CN205478235U CN205478235U CN201620082424.1U CN201620082424U CN205478235U CN 205478235 U CN205478235 U CN 205478235U CN 201620082424 U CN201620082424 U CN 201620082424U CN 205478235 U CN205478235 U CN 205478235U
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Abstract
The utility model relates to a reciprocating compressor tolerance governing system. The characterized in that of this system: the snifter valve is installed in the reciprocating compressor intracavity of breathing in, carries out the hydro -cylinder and is fixed in the snifter valve valve gap and is connected with the fluid pressure line, carries out the hydro -cylinder and adopts split type design with hydraulic control valve, between the two through the fluid pressure line connection. This design special character has 2 points: 1 )Tolerance governing system installs the structure of covering at reciprocal compressor valve does not have electric control element, and this part need not to consider explosion -proofly during in the face of explosion -proof service environment, 2 )Can change hydraulic control valve under the state that the reciprocating compressor was not shut down, avoid the tolerance governing system who carries out hydro -cylinder and hydraulic control valve global design at present must stop earlier the problem that the reciprocating compressor just can carry out hydraulic control valve's maintenance, maintenance and change.
Description
Technical field
This utility model relates to a kind of reciprocating compressor amount regulating system.
Background technology
Reciprocating compressor can be divided into air compressor, nitrogen compressor, carbon-dioxide gas compressor, natural gas compressor according to the difference of compressed media and face hydrogen species compressor in (containing a certain amount of hydrogen in medium).Owing to reciprocating compressor pressure at expulsion is wider with extraction flow subject range, it is widely used in the industries such as oil, petrochemical industry, pipeline, is the core unit in the devices such as hydrogenation, reformation, polyethylene from high pressure process.All the time, reciprocating compressor operation energy consumption is bigger.Generally unit discharge capacity is done certain processing and amplifying during domestic petroleum petrochemical equipment initial designs, and device load does not often reach design requirement in actual motion, cannot be adjusted flexibly according to producing needs owing to reciprocating compressor rated discharge amount is fixing, a large amount of units can only be by returning, to the gases at high pressure after compression, the discharge capacity that flow control is final, and the most substantial amounts of gas is by Repeated Compression.As a example by the rated power unit as 1000KW, unit effective power is about the 50%-60% of rated power, when unit is in 80% load operation, the power just having about 1000KW × 60% × (1-80%)=120KW is in unnecessary waste state, and the electricity charge of waste in a year are more than 2,000,000.
In recent years, the research of reciprocating compressor tolerance regulation technology is accelerated with application paces.Reciprocating compressor tolerance regulative mode includes at present: the regulation of reciprocating compressor start/stop machine, rotational speed regulation, pipeline regulation, clearance volume regulation, pressing-off suction valve regulation.In said method, start/stop machine regulation uses less with method for adjusting rotation speed, no longer compares analysis, and the strengths and weaknesses analysis of other control methods is as follows.
(1) bypass regulation: be commonly called as " returning stream ", operation principle is will to pass through charge air cooler and control valve beyond the compressed gas needed, be input to suction end from exhaust end, for recompression.Because a large amount of gases are compressed repeatedly, unit idle work is more, and therefore the method for bypass energy consumption is the highest.The advantage of bypass regulation is that control is easy, reliable, uses regulation valve can realize stepless being automatically adjusted, and range of accommodation is big.
(2) clearance volume regulation method: by compresser cylinder structure on two sides being transformed and adjusted clearance volume, control cylinder intake air quantity.Owing to reciprocating compressor exists expansion process, by controlling the clearance volume size adjustable expansion process time, being gradually increased with clearance volume, expansion process constantly expands and breathing process constantly shortens, and capacity constantly reduces.Clearance volume method need to carry out bigger change to compressor arrangement body, and expense cost is higher, and outside cylinder is relatively easy, and inner cylinder difficulty is bigger.
(3) pressing-off suction valve regulation method: the method is by hydraulic pressure, air pressure mode, unloader is used to force at compression process pressing-off suction valve, guiding gas returns aspirating air pipe, thus controls capacity, particularly may be divided into total travel and presses off and press off two ways with local stroke.It is relevant to unit concrete structure because of it that total travel presses off method, and flow-control effect is limited；And local stroke presses off method, press off time and Withdrawal times can realize the stepless Flow-rate adjustment of 0～100% in theory by controlling unloader；But gas valves of reciprocating compressors is easily adversely affected by pressing-off suction valve method, cause the faults such as air valve greater impact even valve block fracture.
At present, pressing-off suction valve control method is at present at oil, the most widely used a kind of tolerance control method of Refining Chemical Industry.Total travel is pressed off method and is controlled by cylinders multiple to reciprocating compressor, reaches to regulate tolerance purpose, but range of accommodation and precision are relatively low, can only achieve 0%, and 25%, 50%, 75%, 100%；Partial journey presses off method and presses off by controlling inlet valve in a reciprocating compressor cycle of operation and close, and adjusts unloader and controls compressor air-discharging amount action time.At present, the patent that partial journey presses off the formation of method aspect is more with product, as patent US-A-5695325 is rotated between air valve and valve seat by specific device, it is achieved inlet valve open and close；Form the amount regulating system including Zhejiang University's machine Research Institute of product, the stepless amount regulating system of HydroCOM of He Erbige company of Austria research and development, apply for Chinese patent CN03158561.2, be the stepless amount regulating system being the most uniquely widely used at present.Other regulative modes and systematic study aspect, Wuhan University of Technology has invented a kind of clearance stepless adjusting device of piston reciprocating compressor, has applied for Chinese patent CN200820066897.8；The adjustable small-displacement gas compressor device of a kind of pressure ratio continuously has been invented by Shanghai Communications University, has applied for Chinese patent CN200610148229.5；A kind of charging-controlled combined valve has been invented by Wuxi Wuyang Saide Compressor Co., Ltd., has applied for Chinese patent CN200620070226.X；A kind of air displacement stepless regulating method for reciprocating-piston compressor has been invented by Xi'an Communications University, has applied for Chinese patent CN200710018568.6.
Above-mentioned patent and product, more application has been obtained for representative with the stepless amount regulating system of HydroCOM of He Erbige company of Austria research and development, HydroCOM system uses hydraulic actuating mechanism and electromagnetic valve, electric panel room (comprises microprocessor, the electrical equipments such as solenoid-driven) global design technology, advantage is that each actuator can independently control, but also there is certain shortcoming, need to consider requirement of explosion proof including the electric part in actuator, electric part once catastrophe failure needs compressor shutdown to overhaul, the corresponding a set of hydraulic pressure of each inlet valve is bigger with electrical control agency cost.
For the problem overcoming current reciprocating compressor amount regulating system to exist, the utility model proposes a kind of reciprocating compressor amount regulating system based on hydraulic actuator, use the electrical equipment split-type design such as hydraulic actuating mechanism and hydraulic control valve, significantly simplify compressor block to install, overhaul difficulty, and needs can be controlled according to reality, realize the flexible configuration of hydraulic actuating mechanism and hydraulic control valve, save cost.
Summary of the invention
This utility model relates to a kind of reciprocating compressor amount regulating system, it is characterised in that:
(1) a kind of reciprocating compressor amount regulating system, this system includes inlet valve, inlet valve valve gap, performs oil cylinder, fluid pressure line, hydraulic control valve, hydraulic oil unit, control system, control signal cable, monitoring sensor, monitoring signal cable；It is characterized in that:
Inlet valve is installed in reciprocating compressor suction muffler, performs oil cylinder and is fixed on inlet valve valve gap and is connected with fluid pressure line, performs oil cylinder and uses split-type design with hydraulic control valve, is connected by fluid pressure line between the two.
(2) perform in-oil cylinder plunger and can promote inlet valve unloader positive opening inlet valve valve block under hydraulic oil effect；Performing to install on fluid pressure line between oil cylinder and hydraulic oil unit hydraulic control valve, hydraulic control valve is connected with control system by control signal cable, accepts control system signal and controls the break-make of hydraulic oil, thus controls to perform the oil cylinder effect to inlet valve unloader；Monitoring sensor includes temperature sensor, pressure transducer, liquid level sensor, vibrating sensor, key phase; respectively liquid level in oil pressure, petrol station in monitoring hydraulic oil unit oil temperature, pipeline, perform oil cylinder temperature, gas leakage line temperature, reciprocating compression machine vibration, key signal; above-mentioned signal, by monitoring signal cable metering-in control system, carries out amount regulating system and reports to the police and shut down judgement；
(3) performing oil cylinder and hydraulic control valve and use split-type design, connected by fluid pressure line between the two, this design special character has 2 points:
1) structure that amount regulating system is arranged on reciprocating compressor valve gap does not has electric control element, and when explosion-proof use environment, this part is explosion-proof without considering；
2) hydraulic control valve can be changed under the non-stop-machine state of reciprocating compressor, it is to avoid the amount regulating system performing oil cylinder and hydraulic control valve global design at present must first stop the maintenance that reciprocating compressor just can carry out hydraulic control valve, the problem overhauled and change；
According to the requirement of hydraulic control valve flow with Redundant Control design, between hydraulic control valve and execution oil cylinder, annexation can be divided into following 4 kinds:
1) 1 hydraulic control valve controls 1 road hydraulic pressure execution oil cylinder,
2) 1 hydraulic control valve controls multipath hydraulic execution oil cylinder simultaneously,
3) multiple hydraulic control valves control 1 road hydraulic pressure execution oil cylinder,
4) multiple hydraulic control valves control multipath hydraulic execution oil cylinder simultaneously.
Accompanying drawing explanation
Fig. 1 is system structure schematic diagram；
Fig. 2 is inlet valve, inlet valve valve gap, oil cylinder and unloader installation diagram；
Fig. 3 is monitoring and control circuit theory figure；
Detailed description of the invention
With embodiment, this utility model is described further below in conjunction with the accompanying drawings.
As shown in Figure 1, the present embodiment uses 1 hydraulic control valve to control the pattern of 1 road hydraulic jack, and this reciprocating compressor is the horizontal unit of two cylinders, and the inlet valve quantity of each cylinder is 2, therefore inlet valve is 4, install and perform oil cylinder 4, hydraulic control valve 4, fluid petrol station 1, control system 1 is overlapped, monitoring sensor includes hydraulic oil unit oil temperature, oil pressure, liquid level sensor, each execution cylinder block temperature, each leaking gas conduit temperature sensor, reciprocating compression machine vibration, key phase；
As in figure 2 it is shown, after reciprocating compressor inlet valve, inlet valve valve gap being installed, installing execution oil cylinder has hydraulic oil import, leakage of oil recovery port and recovery port of leaking gas in inlet valve valve gap, employing bolt fastening, execution oil cylinder top-down processing；It is connected by fluid pressure line between hydraulic oil import with hydraulic control room valve；Leakage of oil recovery port is connected with leakage of oil collection box by fluid pressure line；Gas leakage recovery port is connected with air leak recovery device by gas leakage recovery pipe；Performing cylinder block temperature sensor to be installed on cylinder body, leaking gas conduit temperature sensor is installed in gas leakage recovery pipe.
Hydraulic control valve is connected with hydraulic oil unit by fluid pressure line, complete oil-feed and oil return, hydraulic control valve is connected with control system by controlling cable simultaneously, receive control system control signal, can require including Redundant Control, perform cylinder action coherence request etc., select rational control mode according to hydraulic control valve flow according to actual needs, as it was noted above, include four kinds:
1) 1 hydraulic control valve controls 1 road hydraulic pressure execution oil cylinder
Under this kind of mode, each hydraulic pressure performs oil cylinder and independently controls, and controls independence preferable, but high to hydraulic control valve quantitative requirement.
2) 1 hydraulic control valve controls multipath hydraulic execution oil cylinder simultaneously
The inlet valve that multipath hydraulic oil cylinder controls should require to open simultaneously, if inlet valve unlatching requires different, it is impossible to use this programme.
3) multiple hydraulic control valves control 1 road hydraulic pressure execution oil cylinder
Under this kind of mode, similar with first kind of way, each hydraulic pressure performs oil cylinder and independently controls, and controls independence preferable, meanwhile, performs oil cylinder Redundant Control preferable；But it is high to hydraulic control valve quantitative requirement.
4) multiple hydraulic control valves control multipath hydraulic execution oil cylinder simultaneously
Under this kind of mode, similar with the second way, the inlet valve that multipath hydraulic oil cylinder controls should require to open simultaneously, performs oil cylinder Redundant Control also preferable, but high to hydraulic control valve quantitative requirement.
As it is shown on figure 3, each road control signal, monitoring signal are by controlling cable and monitoring signal cable metering-in control system.
This reciprocating compressor amount regulating system work process is as follows:
1) starting hydraulic oil unit and reciprocating compressor, control system checks that hydraulic oil unit oil pressure, oil temperature, liquid level are the most abnormal with unit key signal, and as without exception, can come into operation amount regulating system；
2) coming into operation after amount regulating system, control system sends control instruction, hydraulic control valve execution according to unit key signal to hydraulic control valve, performs oil cylinder and can be obtained the hydraulic oil of hydraulic oil unit output by fluid pressure line；
3) after execution oil cylinder is by hydraulic oil effect, cylinder body inner plunger promotes unloader ejector rod forcibly to open inlet valve valve block；After performing the backflow of oil cylinder inner high voltage oil, unloader high pressure spring promotes push rod to reset with cylinder body inner plunger；
4) inlet valve valve block is by performing oil cylinder effect, opens at Partial shrinkage procedure coercion, and now in reciprocating compressor cylinder block, gas is back in air inlet pipeline by inlet valve, and compressor gas merit reduces, and unit load synchronizes to decline；By controlling hydraulic oil action time and then controlling the inlet valve valve block enforced opening time, compressor load can be controlled, reduce unit capacity, meet needs of production.
The concrete three aspect outstanding advantages of native system:
(1) execution oil cylinder and hydraulic control valve split-type design are used, once hydraulic control valve electrical equipment or mechanical part break down, after hydraulic control valve being carried out power-off and the fluid pressure line pressure release performed between oil cylinder and hydraulic control valve is processed, without stopping reciprocating compressor, the maintenance of hydraulic control valve electrical equipment or mechanical part can be completed, replacing processes, under the conditions of changing existing reciprocating compressor amount regulating system execution oil cylinder and hydraulic control valve global design, hydraulic control valve is replaced, maintenance, it is first necessary to stop the defect that compressor could realize, improve reciprocating compressor operational efficiency, avoid the economic loss caused because of shutdown；
(2) hydraulic control valve and to perform annexation between oil cylinder various, change existing reciprocating compressor amount regulating system hydraulic control valve with perform oil cylinder must defect one to one；By considering that set structure, inlet valve are distributed, Safety Redundancy controls requirement, by selecting flow to meet the hydraulic control valve of requirement, various control scheme can be formulated.Such as, high Safety Redundancy is controlled the occasion required, multiple hydraulic control valve can be used to control 1 road hydraulic pressure and to perform the mode of oil cylinder, perform the main hydraulic control valve of oil cylinder 1, auxiliary hydraulic pressure control valve 1 tunnel, under nominal situation, main hydraulic control valve controls to perform oil path in oil cylinder break-make, and auxiliary hydraulic pressure control valve remains turned-off, the most main hydraulic control valve fault, control system is switched to auxiliary hydraulic pressure control valve and controls to perform oil path in oil cylinder break-make, improves system redundancy；For another example, there is multiple inlet valve reciprocating compressor single cylinder the same side, the regulation of stepless tolerance needs these inlet valves of Synchronization Control, 1 hydraulic control valve can be used simultaneously to control multipath hydraulic and to perform the mode of oil cylinder, by selecting flow to meet the hydraulic control valve of requirement, can ensure that multipath hydraulic performs oil cylinder synchronization action, and then control multiple inlet valve and open and close simultaneously；
(3) native system monitoring sensor is comprehensive, is monitored reciprocating compression machine vibration, key signal especially, is also monitored gas leakage line temperature, it is possible to obtain unit vibration under tolerance regulates, speed conditions, it is judged that the exception that unit occurs；Also can effectively judge to perform oil cylinder to compressing the actual effect of air seal in reciprocating compressor by the change of gas leakage line temperature, safety is preferable.
Claims (2)
1. a reciprocating compressor amount regulating system, this system includes inlet valve, inlet valve valve
Lid, execution oil cylinder, fluid pressure line, hydraulic control valve, hydraulic oil unit, control system, control
Signal cable, monitoring sensor, monitoring signal cable；It is characterized in that:
Inlet valve is installed in reciprocating compressor suction muffler, performs oil cylinder and is fixed on inlet valve valve gap
And be connected with fluid pressure line, perform oil cylinder and hydraulic control valve and use split-type design, both it
Between connected by fluid pressure line.
A kind of reciprocating compressor amount regulating system the most according to claim 1, its feature
It is:
Hydraulic control valve and to perform annexation between oil cylinder be one of following 4 kinds:
1) 1 hydraulic control valve controls 1 road hydraulic pressure execution oil cylinder,
2) 1 hydraulic control valve controls multipath hydraulic execution oil cylinder simultaneously,
3) multiple hydraulic control valves control 1 road hydraulic pressure execution oil cylinder,
4) multiple hydraulic control valves control multipath hydraulic execution oil cylinder simultaneously.
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| CN201620082424.1U CN205478235U (en) | 2016-01-27 | 2016-01-27 | Reciprocating compressor tolerance governing system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939660A (en) * | 2017-11-22 | 2018-04-20 | 北京航天石化技术装备工程有限公司 | A kind of reciprocating compressor tolerance stepless regulating system |
| CN108691760A (en) * | 2018-04-08 | 2018-10-23 | 北京化工大学 | A kind of Capacity Control Method of Reciprocating Compressor of part stroke reflux |
| CN109026642A (en) * | 2018-07-09 | 2018-12-18 | 四川美丰化工股份有限公司 | Reciprocating compressor flow control method based on temperature and admission pressure |
| CN111472961A (en) * | 2020-02-26 | 2020-07-31 | 无锡康茨压缩机配件与系统有限公司 | Stepless air quantity regulation load control method for compressor by adopting side regulation |
| CN114042993A (en) * | 2021-12-08 | 2022-02-15 | 佛山晖泽换热设备有限公司 | Cutting device is used in production of heat exchanger copper pipe |
-
2016
- 2016-01-27 CN CN201620082424.1U patent/CN205478235U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939660A (en) * | 2017-11-22 | 2018-04-20 | 北京航天石化技术装备工程有限公司 | A kind of reciprocating compressor tolerance stepless regulating system |
| CN107939660B (en) * | 2017-11-22 | 2023-12-15 | 北京航天石化技术装备工程有限公司 | Stepless air quantity regulating system of reciprocating compressor |
| CN108691760A (en) * | 2018-04-08 | 2018-10-23 | 北京化工大学 | A kind of Capacity Control Method of Reciprocating Compressor of part stroke reflux |
| CN108691760B (en) * | 2018-04-08 | 2020-06-26 | 北京化工大学 | Method for adjusting gas quantity of reciprocating compressor with local stroke backflow |
| CN109026642A (en) * | 2018-07-09 | 2018-12-18 | 四川美丰化工股份有限公司 | Reciprocating compressor flow control method based on temperature and admission pressure |
| CN111472961A (en) * | 2020-02-26 | 2020-07-31 | 无锡康茨压缩机配件与系统有限公司 | Stepless air quantity regulation load control method for compressor by adopting side regulation |
| CN114042993A (en) * | 2021-12-08 | 2022-02-15 | 佛山晖泽换热设备有限公司 | Cutting device is used in production of heat exchanger copper pipe |
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