CN104631541A - High-power high-voltage motor safe operation protective system of electric hydraulic excavator - Google Patents
High-power high-voltage motor safe operation protective system of electric hydraulic excavator Download PDFInfo
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- CN104631541A CN104631541A CN201510025762.1A CN201510025762A CN104631541A CN 104631541 A CN104631541 A CN 104631541A CN 201510025762 A CN201510025762 A CN 201510025762A CN 104631541 A CN104631541 A CN 104631541A
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Abstract
The invention discloses a high-power high-voltage motor safe operation protective system of an electric hydraulic excavator. The high-power high-voltage motor safe operation protective system comprises a high-voltage motor (1), a high-voltage vacuum auxiliary contactor (6), an electric reactor (7), a high-voltage power supply detection unit (9), a high-voltage fuse (11), a control transformer (12), a low-voltage switch (13), an overvoltage protector (20), a main controller (18), a high-voltage vacuum main contactor (5), a microcomputer protector (8), an automatic vacuum breaker (10), an insulation detection device (15), a motor heater control device (16) and a stop button (17), wherein the high-voltage vacuum main contactor (5), the microcomputer protector (8), the automatic vacuum breaker (10), the insulation detection device (15), the motor heater control device (16) and the stop button (17) are connected with the main controller; the high-voltage motor is internally provided with a motor heater, a temperature sensor and a lubrication detection switch. By the adoption of the high-power high-voltage motor safe operation protective system, the high-power high-voltage motor can safely start and operate on the excavator, and the application economical efficiency, the environmental protection performance and the operating safety and reliability of the excavator are achieved.
Description
Technical field
The present invention relates to a kind of electric hydraulic excavating machine motor safe operation protection system, specifically a kind of electric hydraulic excavating machine high-power high voltage motor safe operation protection system, belongs to excavator high power motor security protection technology field.
Background technology
Ultra-large type hydraulic crawler excavator has flexibly, and efficiency is high, and structure is simple, and volume is little, the advantage that cost is low, deeply welcomes by large-scale mine.Along with global environment worsens, the problems such as energy scarcity become increasingly conspicuous, and energy-saving and emission-reduction have become the object of all trades and professions primary study.The motor of current ultra-large type hydraulic crawler excavator mainly adopts high output diesel engine and motor, and because high output diesel engine efficiency is low, oil consumption high noisy is large, pollute high, domestic fuel price is high, and manufacturer is few, purchase cost is high, and motor efficiency is high, domestic grid costs is low, pollution-free, manufacturer is more, there is cost of use low, parts buying and maintenance cost low, environmental protection.Therefore, ultra-large type electric hydraulic excavating machine becomes the research direction of large excavator energy-saving and emission-reduction gradually, deeply welcomes by mine at home.
For mining 100 ~ 400 ton large-scale hydraulic crawler excavators, dynamical system power at least 500kw ~ 1500KW, existing national main flow electrical network grade is 220V, 380V, 6KV, 10KV, 35KV,, working cable severe by starting current and excavator operating mode need move with excavator, less to automatically controlled space.Due to 6KV as high power motor in industrial control field extensive use, required components and parts small volume, the requirement that the automatically controlled space of excavator is little can be met, but the thinner starting current of cable reduces about 15 times than 380V, if motor total head directly starts, starting current is about 6 times of rated current, hydraulic crawler excavator is when starting, load is low, is equivalent to No Load Start, has certain influence to electrical network impact, electrical machinery life.Therefore, require higher to protection, insulation and safe distance than 380V.
In addition, hydraulic excavator for mine affects by resource distribution, be mainly used in the mine environment that low temperature is high and cold, high humility, high temperature, High aititude, high dust etc. are severe, vibratory impulse is large, open work, and under low-temperature condition, cable connector, electrical machine insulation there will be frost, condensation, therefore, higher to water proof and dust proof deicing requirements.
In sum, if 6KV/50hz electric network source is as the motor power of large hydraulic excavator, the safe and reliable operation of motor how is enable to become the technical problem being badly in need of solution at present.
Summary of the invention
For above-mentioned prior art Problems existing; the object of this invention is to provide a kind of electric hydraulic excavating machine high-power high voltage motor safe operation protection system; load required for it can be provided when excavating machine starting; and excavator can be met in severe working environment during operation; water proof and dust proof is antifreeze; high temperature resistant; meet various working condition requirement; make the clean boot on board a dredger of high-power high voltage motor, safe operation; meet excavator its usage economy, the feature of environmental protection, and the safety and reliability of operation.
To achieve these goals, a kind of electric hydraulic excavating machine high-power high voltage of the present invention motor safe operation protection system, comprises high-tension motor, high pressure vacuum auxiliary contactor, reactor, high voltage source detecting unit, high-voltage insurance, control transformer, low tension switch, overvoltage protector, master controller, and the high pressure vacuum main contactor be connected with master controller, Microcomputer Protection device, automatic vacuum line breaker, insulation detection device, motor heating device control device and stop button; Described high-tension motor inside is also provided with motor heating device, temperature pick up and lubrication sense switch; Described temperature pick up is connected with master controller with lubrication sense switch;
Described high-tension motor connects automatic vacuum line breaker by high pressure vacuum main contactor, and automatic vacuum line breaker connects high voltage source detecting unit;
Described automatic vacuum line breaker connects control transformer by high-voltage insurance, and control transformer connects insulation detection device and motor heating device control device respectively by low tension switch, and described motor heating device control device is connected with motor heating device;
Described reactor one end takes over voltage protector and high-tension motor respectively, and the other end connects Microcomputer Protection device by high pressure vacuum auxiliary contactor, described overvoltage protection device ground connection.
Further, the circuit between automatic vacuum line breaker and main controller is connected to emergency stop push button.
Further, be also provided with phase sequence relay, described phase sequence relay is all connected on the circuit between low tension switch and motor heating device control device by wire.
Further, be also provided with transmission monitor, described transmission monitor is electrically connected with master controller.
Preferably, transmission monitor is large-scale LCDs.
Compared with prior art, Starting mode buying reduced-voltage starting of the present invention reduces high power motor starting current, prevents electrical network from impacting; Microcomputer Protection device is used to prevent motor phase failure, overcurrent protection; Use and adopt high-pressure detection unit detection of grid voltage; Use automatic vacuum line breaker to control total system, super safe time automatically protect; Heating system is used to prevent motor from making moist and condensation; Phase sequence relay is used to prevent motor reversal; Insulation detection device is used to prevent electrical part insulation ag(e)ing leaky from occurring; By control transformer, 6KV high pressure is become 380V and 24V safe working voltage; Master controller and exigency stop system is used to carry out grading control according to level of security to system; and use giant-screen watch-dog to show all information; and simultaneous display and warning are carried out to anomaly; thus the work that well protection motor is safe and reliable in running, also well protect the personal safety of staff simultaneously.The present invention is applicable to high-power high voltage motor, is particularly useful for 100 ~ 400 tons of high-power electric hydraulic crawler excavators.
Accompanying drawing explanation
Fig. 1 is principle of the invention figure.
In figure: 1. high-tension motor, 2. motor heating device, 3. temperature pick up; 4. lubricate sense switch; 5. high pressure vacuum main contactor, 6. high pressure vacuum auxiliary contactor, 7. reactor; 8. Microcomputer Protection device; 9. high voltage source detecting unit, 10. automatic vacuum line breaker, 11. high-voltage insurances; 12. control transformers; 13. low tension switches, 14. phase sequence relay, 15. insulation detection devices; 16. motor heating device control device; 17. stop buttons, 18. master controllers, 19. main monitoring; 20. overvoltage protection devices, 21. emergency stop push buttons.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, a kind of electric hydraulic excavating machine high-power high voltage of the present invention motor safe operation protection system, comprise high-tension motor 1, high pressure vacuum auxiliary contactor 6, reactor 7, high voltage source detecting unit 9, high-voltage insurance 11, control transformer 12, low tension switch 13, overvoltage protector 20, master controller 18, and the high pressure vacuum main contactor 5 be connected with master controller 18, Microcomputer Protection device 8, automatic vacuum line breaker 10, insulation detection device 15, motor heating device control device 16 and stop button 17; Described high-tension motor 1 inside is also provided with motor heating device 2, temperature pick up 3 and lubrication sense switch 4; Described temperature pick up 3 is connected with master controller 18 with lubrication sense switch 4;
Described high-tension motor 1 connects automatic vacuum line breaker 10 by high pressure vacuum main contactor 5, and automatic vacuum line breaker 10 connects high voltage source detecting unit 9;
Described automatic vacuum line breaker 10 connects control transformer 12 by high-voltage insurance 11, and control transformer 12 connects insulation detection device 15 and motor heating device control device 16 by low tension switch 13, and motor heating device control device 16 is connected with motor heating device 2;
Described reactor 7 one end takes over voltage protector 20 and high-tension motor 1 respectively, and the other end connects Microcomputer Protection device 8 by high pressure vacuum auxiliary contactor 6, described overvoltage protection device ground connection 20;
Described insulation monitoring and warning device 15 is all connected on the circuit between low tension switch 13 and motor heating device control device 16 by wire.
As the improvement of the present invention to technique scheme; circuit between described automatic vacuum line breaker 10 and main controller 18 is connected to emergency stop push button 21; when vehicle has irresistible factor; when needing to stop immediately; press the tight scram button 21 on vehicle, automatic vacuum line breaker 10 will be disconnected immediately, disconnect 6kv high voltage source; motor shuts down, thus protects the personal safety of staff preferably.
As the further improvement of the present invention to technique scheme, described phase sequence relay 14 is all connected on the circuit between low tension switch 13 and motor heating device control device 16 by wire.Phase sequence relay mainly plays the effect preventing motor reversal, detects power phase by phase sequence relay 14, and ensure that motor power phase sequence is normal, motor can rotate according to clockwise direction, prevents main pump from reversely rotating.Static control high pressure vacuum main contactor 5 and high pressure vacuum auxiliary contactor 6 closing of contact.
As the further improvement of the present invention to technique scheme, the present invention is provided with safe man-machine interface, and described master controller 18 is connected with transmission monitor 19.Described transmission monitor 19 is large-scale LCDs.By transmission monitor 19 pairs of system phase shortages, overvoltage, under-voltage, all press the phenomenon such as imbalance, overcurrent, overload, overheated, velocity anomaly, Communications failure to show, be convenient to monitoring and the operation excavator of staff.
This electric hydraulic excavating machine dynamical system mainly adopts electrical network 6KV high-tension electricity, by high voltage source detecting unit 9, press automatic vacuum line breaker 10 switch knob, high pressure vacuum main contactor 5 powers to high-tension motor 1 and the work of control motor and stopping are carried out in power failure, drives main pump work and stopping.
During startup, control high pressure vacuum auxiliary contactor 6 conducting in high-voltage motor 1 front end by master controller 18, seal in reactor 7; After motor rotation 5s, connect high pressure vacuum main contactor 5, disconnect high pressure vacuum auxiliary contactor 6 simultaneously, high-voltage motor is normally run, reduces motor starting current and electrical network is impacted.
6KV high pressure is introduced by automatic vacuum line breaker 10 lower end, through high-voltage insurance 11, be 24V and 380V safe voltage to control transformer 12 transformation, control low voltage control system by low tension switch 13, be that 24V powers to a whole set of control system by rectification, effectively improve the safety that machine runs.
High-tension motor 1 indoor design motor heating device 2, temperature pick up 3, lubrication sense switch 4; when detection does not work for a long time; or environment temperature less than-10 DEG C low temperature; control motor heating device control device 16 by master controller 18 to work; motor heating device 2 pairs of high-tension motors 1 are used to carry out heat drying, to be heated after normal condition, high-tension motor 1 could be started; and shown by main monitoring 19, thus protect motor preferably.
When lacking lubricant grease, lubrication sense switch 4 disconnects, control high pressure vacuum main contactor 5 after master controller 18 Information Monitoring and high pressure vacuum auxiliary contactor 6 can not close, ensure that bearing of motor lubricating system normally works, prevent motor to lack lubricating grease stuck and burn out motor.
By Microcomputer Protection device 8 pairs of current of electric, voltage acquisitions; information exchange is carried out by CAN and master controller 18; when there is high pressure Main motor current overcurrent, voltage overvoltage, phase shortage; control high pressure vacuum main contactor 5 and high pressure vacuum auxiliary contactor 6 contact are in disconnection; when not disconnecting, control automatic vacuum line breaker 10 and disconnect immediately.
By master controller, auxiliary relay 6 is controlled; Time high pressure vacuum main contactor 5 works, high pressure vacuum auxiliary contactor 6 can not be connected; Before connecting high pressure vacuum auxiliary contactor 6, must be that high pressure vacuum main contactor 5 stops more than 2 minutes.
When vehicle needs to stop, press stop button 17, disconnect high pressure vacuum main contactor 5 by controller 18, motor power-off is shut down, overvoltage protection device absorbs the surge produced when motor stops.Press automatic vacuum line breaker 10 stop button again, disconnect 6kv high-tension electricity, disconnect high voltage source on digging machine.
6KV, 380V, 220V system detection of electrical leakage on insulation detection device 15 pairs of excavators, if find electric leakage, automatically automatic vacuum line breaker 10 is stopped immediately, namely 6kv power supply is disconnected, motor shuts down, efficiently avoid unexpected generation, ensure that the personal safety of staff and the safety of machine operation.
Applicable industry electrical network 6KV power supply of the present invention, motor is replaced with high power motor, effectively prevent the strong electric system of 6KV at low temperature, high humility, high temperature, difficulty in starting is there is in high altitude environment, overvoltage, under-voltage, frost, condensation, overheated, overcurrent, overload, phase shortage, motor reversal, motor for preventing starts for 2 times, emergency, urgent exception parking, the anomalies such as speed, ensure that electric excavator 6KV high-tension motor can safe operation, the Proper Match of motor and hydraulic pump power is realized by efficient power control strategy, and in screen display all working status data, ensure that excavator motor normally works.
Claims (5)
1. an electric hydraulic excavating machine high-power high voltage motor safe operation protection system, comprise high-tension motor (1), it is characterized in that, also comprise high pressure vacuum auxiliary contactor (6), reactor (7), high voltage source detecting unit (9), high-voltage insurance (11), control transformer (12), low tension switch (13), overvoltage protector (20), master controller (18), and the high pressure vacuum main contactor (5) to be connected with master controller (18), Microcomputer Protection device (8), automatic vacuum line breaker (10), insulation detection device (15), motor heating device control device (16) and stop button (17), described high-tension motor (1) inside is also provided with motor heating device (2), temperature pick up (3) and lubrication sense switch (4), described temperature pick up (3) is connected with master controller (18) with lubrication sense switch (4),
Described high-tension motor (1) connects automatic vacuum line breaker (10) by high pressure vacuum main contactor (5), and automatic vacuum line breaker (10) connects high voltage source detecting unit (9);
Described automatic vacuum line breaker (10) connects control transformer (12) by high-voltage insurance (11), control transformer (12) connects insulation detection device (15) and motor heating device control device (16) respectively by low tension switch (13), and described motor heating device control device (16) is connected with motor heating device (2);
Described reactor (7) one end takes over voltage protector (20) and high-tension motor (1) respectively, and the other end connects Microcomputer Protection device (8), described overvoltage protection device ground connection (20) by high pressure vacuum auxiliary contactor (6).
2. a kind of electric hydraulic excavating machine high-power high voltage motor safe operation protection system according to claim 1, is characterized in that, the circuit between described automatic vacuum line breaker (10) and main controller (18) is connected to emergency stop push button (21).
3. a kind of electric hydraulic excavating machine high-power high voltage motor safe operation protection system according to claim 1 and 2; it is characterized in that; also be provided with phase sequence relay (14), described phase sequence relay (14) is connected on the circuit between low tension switch (13) and motor heating device control device (16) by wire.
4. a kind of electric hydraulic excavating machine high-power high voltage motor safe operation protection system according to claim 3, it is characterized in that, be also provided with transmission monitor (19), described transmission monitor (19) is electrically connected with master controller (18).
5. a kind of electric hydraulic excavating machine high-power high voltage motor safe operation protection system according to claim 4, it is characterized in that, described transmission monitor (19) is large-scale LCDs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510025762.1A CN104631541B (en) | 2015-01-20 | 2015-01-20 | System is protected in a kind of electric hydraulic excavating machine high-power high voltage motor safe operation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510025762.1A CN104631541B (en) | 2015-01-20 | 2015-01-20 | System is protected in a kind of electric hydraulic excavating machine high-power high voltage motor safe operation |
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| CN104631541A true CN104631541A (en) | 2015-05-20 |
| CN104631541B CN104631541B (en) | 2017-10-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109515209A (en) * | 2018-10-18 | 2019-03-26 | 南京世界村汽车动力有限公司 | A kind of new-energy automobile electric-control system |
| CN110828253A (en) * | 2018-08-08 | 2020-02-21 | 三菱电机株式会社 | Energy storage method of air circuit breaker and air circuit breaker |
| CN111490478A (en) * | 2020-02-12 | 2020-08-04 | 贵州振华群英电器有限公司（国营第八九一厂） | Standard machine box type intelligent comprehensive power distribution structure |
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Cited By (4)
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Effective date of registration: 20190321 Address after: 221000 39 Gaoxin Road, Xuzhou Economic Development Zone, Jiangsu Patentee after: Xuzhou Xugong Mining Machinery Co., Ltd. Address before: 221000 39 Gaoxin Road, Xuzhou Economic Development Zone, Jiangsu Patentee before: XCMG Excavator Machinery Co., Ltd. |