CN202690448U - Control system for low-pressure oil injection screw compressor - Google Patents
Control system for low-pressure oil injection screw compressor Download PDFInfo
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- CN202690448U CN202690448U CN 201220354283 CN201220354283U CN202690448U CN 202690448 U CN202690448 U CN 202690448U CN 201220354283 CN201220354283 CN 201220354283 CN 201220354283 U CN201220354283 U CN 201220354283U CN 202690448 U CN202690448 U CN 202690448U
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Abstract
The utility model relates to a control system for a low-pressure oil injection screw air compressor. The control system comprises a main motor, a cooling fan, an alternating current contactor, an isolation control transformer, an instrument fuse, a resistance-capacitance absorber, a current transducer, a fuse, an air circuit breaker, a hot protective relay, a low voltage controller, a loading/unloading solenoid valve, a fan contactor, a main contactor, a star contactor, an angle contactor, an oil pump contactor, a mushroom-head-shaped emergency stop switch, an oil pump motor, a temperature sensor, a pressure sensor, an air-filtering differential pressure switch, an oil-filtering differential pressure switch and an oil-separating differential pressure switch, wherein the loading/unloading solenoid valve is connected with the temperature sensor; the fan contactor is connected with the low-pressure controller; the main contactor is connected with the instrument fuse; the star contactor is connected with the pressure sensor; and the low voltage controller is respectively connected with an exhausting temperature sensor, a front bearing exhausting temperature sensor, an exhausting pressure sensor and an oil injecting pressure sensor. The control system for the low-pressure oil injection screw compressor solves the problems of insufficient oil injection and excessively low oil injection pressure of a machine head.
Description
Technical field
The utility model relates to Compressor Manufacturing, particularly the control system of the low-pressure fuel injection screw air compressor of a kind of delivery pressure below 0.3MPa.
Background technique
The common delivery pressure of compressor industry is more than the 0.7MPa at present.Along with productivity grow stronger day by day and all trades and professions to the demand of different operating pressure, the compressed-air actuated demand of low-pressure is also growing.When being 0.2-0.3MPa with atmospheric pressure, select conventional 0.7-0.8MPa air compressor will cause huge power wastage, select the low pressure screw air compressor under same power of motor, can increase considerably compressed-air actuated gas production, correspondingly can power saving 20%-50%.
If buy the air compressor of 0.7MPa, and actual working pressure is 0.3MPa, its working procedure is normally such: screw host arrives 0.7MPa with air compressing first, by approach such as reduction valve pressure is being reduced to the 0.3MPa use.That is to say, use be 0.3MPa pressure, what bear is the power consumption of 0.7MPa.From energy-conservation angle, compare like this power consumption, be great waste, with China's sustainable development, the core concepts such as energy-saving and emission-reduction are not inconsistent.
At present, use numerous air compressors in industries such as China's weaving, glass, powder conveying, it is in large scale, and traditional piston compressor energy consumption is high, and noise is large, volume is large, is badly in need of updating.
Summary of the invention
Task of the present utility model provides a kind of low-pressure exhaust end base of oil injection threaded bolt control system of air compressor; it has solved following two problems: one is the problem of head fuel injection quantity deficiency; Second Problem is the excessively low protection of injection pressure and detection, so that realize reliable operation in making low pressure fuel injector screw air compressor process.
Technical solution of the present utility model is as follows:
A kind of low-pressure exhaust end base of oil injection threaded bolt control system of air compressor, it comprises main motor, cooling blower, A.C. contactor, isolated controlling transformer, instrument fus, rc absorber, current transducer, fus, air circuit breaker and hot protective relay, and it also comprises low-pressure controller, loading and unloading solenoid valve, blower fan contactor, main contactor, star contactor, corner connection tentaculum, oil pump contactor, the tight guard's valve of mushroom head, Oil pump electrical machinery, temperature transducer, pressure transducer, air filter differential pressure switch, oil filter differential pressure switch and oil content differential pressure switch;
Described loading and unloading solenoid valve (14) connects temperature transducer (12), blower fan contactor (31) connects low-pressure controller (10), main contactor (32) connects instrument fus (7), star contactor (33) Bonding pressure sensor (13), the tight guard's valve of the first mushroom head (9), corner connection tentaculum (34) connects loading and unloading solenoid valve (14), Oil pump electrical machinery (11), and oil pump contactor (35) connects current transducer (16), rc absorber (15);
Described pressure transducer (13) comprises back pressure transducer (131) and injection pressure sensor (132);
Described temperature transducer (12) comprises exhaust gas temperature sensor (121) and fore bearing exhaust gas temperature sensor (122);
Described low-pressure controller (10) Y0 output terminal connects loading and unloading solenoid valve (14), low-pressure controller (10) Y1 holds connecting fan contactor (31), low-pressure controller (10) Y3 end connects main contactor (32), low-pressure controller (10) Y4 end connects star contactor (33), low-pressure controller (10) Y5 holds angle of attachment contactor (34), and low-pressure controller (10) Y6 end connects oil pump contactor (35);
Described low-pressure controller (10) connects respectively exhaust gas temperature sensor (121), fore bearing exhaust gas temperature sensor (122), back pressure transducer (131), injection pressure sensor (132);
Described low-pressure controller (10) also connects respectively the tight guard's valve of the second mushroom head (21), air filter differential pressure switch (25), oil filter differential pressure switch (26), oil content differential pressure switch (27);
The monitoring of described low-pressure controller (10) main control system three phase circuit, the monitoring of blower fan three phase circuit and three-phase voltage phase sequence detect.
Because low pressure fuel injector screw air compressor working pressure is low, the head fuel injection quantity is not enough, therefore needs oil pump of particular design to come supercharging to continue to the screw host fuel feeding.Low-pressure exhaust end base of oil injection threaded bolt control system of air compressor of the present utility model increases an oil pump control output point, is used for strict control oil pump start and stop.Cause the head oil-feed too much if drive too early oil pump, starting load is bigger than normal, and its Main motor current is excessive, and it is large that sky is opened load, may cause overload-alarm to shut down.If too late unlatching oil pump can cause the screw rod head excessively low because of injection pressure, can't make lubricant oil enter head, cause screw rod head oil starvation to damage bearing, cause the equipment significant trouble, easily damage equipment.
Low-pressure exhaust end base of oil injection threaded bolt control system of air compressor of the present utility model also arranges a pressure transducer, be used for detecting injection pressure, by strict test, provide suitable oil pump and open and stop time simultaneously, thereby guarantee low-pressure fuel injection helical lobe compressor reliable operation.In case injection pressure is lower than the setting value shutdown of will reporting to the police.
Description of drawings
Fig. 1 is the left-half of the electrical schematic diagram of a kind of low-pressure exhaust end base of oil injection threaded bolt control system of air compressor of the present utility model.
Fig. 2 is the right half part of the electrical schematic diagram of a kind of low-pressure exhaust end base of oil injection threaded bolt control system of air compressor of the present utility model, and wherein left-half links to each other by L1, L2, L3 line with right half part.
Reference character:
1 is main motor M 1; 2 is cooling blower M2; 3 is A.C. contactor KM1; KM3; 4 is A.C. contactor KM2; 5 is A.C. contactor KM4; KM5; 6 is isolated controlling transformer T1; 7 is instrument fus FU1; 8 is instrument fus FU2; 9 is the tight guard's valve SB1-1 of the first mushroom head; 10 is low-pressure controller PLC; 11 is Oil pump electrical machinery M3; 12 is temperature transducer, and 121 is exhaust gas temperature sensor RT1, and 122 is fore bearing exhaust gas temperature sensor RT2; 13 is pressure transducer; 131 is back pressure transducer BP1, and 132 is injection pressure sensor BP2, and 14 is loading and unloading solenoid valve YV1; 15 is rc absorber RC1-6; 16 is current transducer CT1, and 17 is current transducer CT2, and 18 is wiring base XT1; 19 is wiring base XT2; 20 is air circuit breaker QF1, and 21 is the tight guard's valve SB1-2 of the second mushroom head, and 22 is tenminal block baffle plate XT2-1; 23 is terminal retainer XT2-2; 24 is hot protective relay FR1, and 25 is air filter differential pressure switch PS1, and 26 is oil filter differential pressure switch PS2; 27 is oil content differential pressure switch PS3; 29 is fus FU0, and 30 is air circuit breaker QF0, and 31 is the blower fan contactor; 32 is main contactor; 33 is star contactor, and 34 are the corner connection tentaculum, and 35 is the oil pump contactor.
Embodiment
Referring to Fig. 1 and Fig. 2; the utility model provides a kind of low-pressure exhaust end base of oil injection threaded bolt control system of air compressor, wherein is provided with main motor M 1, cooling blower M2, Oil pump electrical machinery M3, A.C. contactor KM1-5, isolated controlling transformer T1, instrument fus FU1, FU2, rc absorber RC1-6, current transducer CT1, CT2, fus FU0, air circuit breaker QF0, QF1, hot protective relay FR1, wiring base XT1, XT2, tenminal block baffle plate XT2-1 and terminal retainer XT2-2.
The utility model also is provided with low-pressure specific PLC controller 10, loading and unloading solenoid valve 14, blower fan contactor 31, main contactor 32, star contactor 33, corner connection tentaculum 34, oil pump contactor 35, the tight guard's valve SB1-1 of the first mushroom head, the tight guard's valve SB1-2 of the second mushroom head, temperature transducer 12, pressure transducer 13, air filter differential pressure switch PS1, oil filter differential pressure switch PS2 and oil content differential pressure switch PS3.Wherein pressure transducer 13 comprises back pressure transducer 131 and injection pressure sensor 132, and temperature transducer 12 comprises exhaust gas temperature sensor 121 and fore bearing exhaust gas temperature sensor 122.
As shown in Figure 2, loading and unloading solenoid valve 14 connects temperature transducer 12, blower fan contactor 31 connects low-pressure controller 10, main contactor 32 connects instrument fus 7, star contactor 33 Bonding pressure sensors 13 and the tight guard's valve 9 of the first mushroom head, corner connection tentaculum 34 connects loading and unloading solenoid valve 14 and Oil pump electrical machinery 11, and oil pump contactor 35 connects current transducer 16 and rc absorber 15.
The Y0 output terminal of low-pressure controller 10 connects loading and unloading solenoid valve 14, the Y1 end connecting fan contactor 31 of low-pressure controller 10, the Y3 end of low-pressure controller 10 connects main contactor 32, the Y4 end of low-pressure controller 10 connects star contactor 33, the Y5 end angle of attachment contactor 34 of low-pressure controller 10, the Y6 end of low-pressure controller 10 connects oil pump contactor 35.
Low-pressure controller 10 connects respectively exhaust gas temperature sensor 121, fore bearing exhaust gas temperature sensor 122, back pressure transducer 131, injection pressure sensor 132.Low-pressure controller 10 also connects respectively the tight guard's valve 21 of the second mushroom head, air filter differential pressure switch 25, oil filter differential pressure switch 26, oil content differential pressure switch 27.
The monitoring of low-pressure controller 10 main control system three phase circuits, the monitoring of blower fan three phase circuit and three-phase voltage phase sequence detect.
Work and the control procedure of low-pressure exhaust end base of oil injection threaded bolt control system of air compressor of the present utility model are as follows:
According to electrical schematic diagram mounting electrical element, connect all lines, carry out the parameter setting, and come into operation after the start debugging well.
Screw rod owner motor uses traditional star delta reduced-voltage starting so that the structure of compressor more simple, be convenient to maintenance.Cooling blower and Oil pump electrical machinery power are lower, use direct Starting mode.Control the startup of main motor, the startup of cooling blower and the startup of pressure oil pump by programmable controller.Controlling the PLC controller of selecting particular design, wherein the Y0 end is exported the controlled loading solenoid valve, Y1 end control blower fan contactor, Y3 end control main contactor is switched on to motor, Y4 end control star contactor, Y5 end controlled angle contactor, Y6 end control oil pump contactor.The PLC controller is controlled one tunnel delivery temperature, one road fore bearing temperature, one tunnel exhaust pressure, one road injection pressure.The monitoring of PLC controller main control system three phase circuit, the monitoring of blower fan three phase circuit and three-phase voltage phase sequence detect.
Main contactor and star contactor adhesive get electric after the start, so that air compressor starts under the star state, through behind certain delay time, the adhesive of dihedral contactor, the star contactor disconnects, finished the star delta reduced-voltage starting this moment, after the adhesive of dihedral contactor 5 second the gear pump motor begin adhesive and continue to pressurize to injection tubing.A period of time rear electromagnetic valve after the main frame start begins electricly, and compressor starts loads.In service, control system, is opened suction valve and is made load operating when it is lower than the on-load pressure of setting according to the feedback of delivery pressure; When it is higher than the unloading pressure of setting, closes suction valve and do the unloading operation, so that the delivery pressure of air compressor is between on-load pressure and unloading pressure.Under normal operating condition, press the halt command key, controller can disconnect solenoid valve immediately, to close suction valve, allows air compressor continue operation a period of time complete main motor and blower fan of just closing of delaying time under unloaded state.Oil pump electrical machinery quits work 2 seconds after shutdown.The working condition of real-time detection two-way temperature in service, two-way pressure is in case exceed the shutdown of can reporting to the police of the alarming value of setting.
Certainly, those skilled in the art in the art will be appreciated that, above-described embodiment only is that the utility model is described, and be not with opposing restriction of the present utility model, as long as in connotation scope of the present utility model, all will drop in the scope of the utility model claim variation, the modification of above-described embodiment.
Claims (1)
1. low-pressure exhaust end base of oil injection threaded bolt control system of air compressor, it comprises main motor, cooling blower, A.C. contactor, the isolated controlling transformer, the instrument fus, rc absorber, current transducer, fus, air circuit breaker and hot protective relay, it is characterized in that it also comprises the low-pressure controller, the loading and unloading solenoid valve, the blower fan contactor, main contactor, star contactor, the corner connection tentaculum, the oil pump contactor, the tight guard's valve of mushroom head, Oil pump electrical machinery, temperature transducer, pressure transducer, the air filter differential pressure switch, oil filter differential pressure switch and oil content differential pressure switch;
Described loading and unloading solenoid valve (14) connects temperature transducer (12), blower fan contactor (31) connects low-pressure controller (10), main contactor (32) connects instrument fus (7), star contactor (33) Bonding pressure sensor (13), the tight guard's valve of the first mushroom head (9), corner connection tentaculum (34) connects loading and unloading solenoid valve (14), Oil pump electrical machinery (11), and oil pump contactor (35) connects current transducer (16), rc absorber (15);
Described pressure transducer (13) comprises back pressure transducer (131) and injection pressure sensor (132);
Described temperature transducer (12) comprises exhaust gas temperature sensor (121) and fore bearing exhaust gas temperature sensor (122);
Described low-pressure controller (10) Y0 output terminal connects loading and unloading solenoid valve (14), low-pressure controller (10) Y1 holds connecting fan contactor (31), low-pressure controller (10) Y3 end connects main contactor (32), low-pressure controller (10) Y4 end connects star contactor (33), low-pressure controller (10) Y5 holds angle of attachment contactor (34), and low-pressure controller (10) Y6 end connects oil pump contactor (35);
Described low-pressure controller (10) connects respectively exhaust gas temperature sensor (121), fore bearing exhaust gas temperature sensor (122), back pressure transducer (131), injection pressure sensor (132);
Described low-pressure controller (10) also connects respectively the tight guard's valve of the second mushroom head (21), air filter differential pressure switch (25), oil filter differential pressure switch (26), oil content differential pressure switch (27);
The monitoring of described low-pressure controller (10) main control system three phase circuit, the monitoring of blower fan three phase circuit and three-phase voltage phase sequence detect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220354283 CN202690448U (en) | 2012-07-20 | 2012-07-20 | Control system for low-pressure oil injection screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220354283 CN202690448U (en) | 2012-07-20 | 2012-07-20 | Control system for low-pressure oil injection screw compressor |
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| Publication Number | Publication Date |
|---|---|
| CN202690448U true CN202690448U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220354283 Expired - Lifetime CN202690448U (en) | 2012-07-20 | 2012-07-20 | Control system for low-pressure oil injection screw compressor |
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| Country | Link |
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| CN (1) | CN202690448U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949036A (en) * | 2017-05-10 | 2017-07-14 | 南京中车浦镇海泰制动设备有限公司 | One kind auxiliary uses oil-free air compressor device |
-
2012
- 2012-07-20 CN CN 201220354283 patent/CN202690448U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949036A (en) * | 2017-05-10 | 2017-07-14 | 南京中车浦镇海泰制动设备有限公司 | One kind auxiliary uses oil-free air compressor device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |
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| CX01 | Expiry of patent term |