CN202450561U - Electric hydraulic excavator - Google Patents
Electric hydraulic excavator Download PDFInfo
- Publication number
- CN202450561U CN202450561U CN 201120553047 CN201120553047U CN202450561U CN 202450561 U CN202450561 U CN 202450561U CN 201120553047 CN201120553047 CN 201120553047 CN 201120553047 U CN201120553047 U CN 201120553047U CN 202450561 U CN202450561 U CN 202450561U
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- variable pump
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- frequency converter
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Abstract
The utility model discloses an electric hydraulic excavator with an electricity grid as a power source. The electric hydraulic excavator comprises a controller, a main motor frequency converter, a main motor, a first pressure transmitter, a second pressure transmitter, a pilot pump, a first variable pump, a second variable pump, a first power regulator, a second power regulator, an electromagnetic proportional valve, a rotary speed reducer, a rotary motor and a rotary frequency converter. In the electric hydraulic excavator, the motor is powered by a 380V electricity grid; the controller is in data communication with the frequency converter, converts the frequency and regulates the speed of the motor according to change of a load and controls the electromagnetic proportional valve to regulate the pumping power of the variable pump, so as to achieve optimal power matching; and the controller is in data communication with the rotary motor frequency converter and converts the frequency and regulates the speed of the rotary motor. The electric hydraulic excavator solves the problem that the rotation speed of the conventional electric excavator is fixed and cannot be regulated, realizes reasonable power matching, realizes electric driving of a rotary device, and solves the problem of high energy consumption caused by hydraulic rotation, thereby being energy-saving, low-noise and environment-friendly.
Description
Technical field
The utility model relates to a kind of electric power hydraulic crawler excavator, and being specifically related to a kind of power source is the electrical network electric energy, and can realize the hydraulic crawler excavator of rational power coupling.
Background technology
For a long time, the excavator of each producer is that excavator work provides power source with engine combustion diesel oil all, and the traditional power mode of this kind not only costs an arm and a leg, and the pollution of environment also can not be ignored.Along with International Crude Oil rises steadily, the running cost of excavator constantly increases; Simultaneously, the notion of low-carbon environment-friendly has more and more become the new concept of product design.Though the domestic product that electric excavator is arranged, it is dual-purpose to have plenty of electronic and diesel oil, and what have plenty of employing is constant speed motor; Pattern is single, and operating rate is unadjustable, can't carry out the power adjustment; Revolution simultaneously drives and still adopts fluid motor-driven, does not have thoroughly to solve the problem of hydraulic pressure coupling.
Application number is 200710118549.0 one Chinese patent application, discloses a kind of fuel oil and electric dual-purpose digging machine, comprises vehicle frame; Vehicle frame is provided with panoramic table, and panoramic table is provided with ac motor, additional one group of hydraulic pump that drives with ac motor in hydraulic system; Be used alternatingly through fuel oil, electronic two kinds of type of drive; But corresponding, its structure more complicated has been used fuel oil equally in the middle of use; And the switching of two kinds of type of drive can only be after a kind of stop using, start a kind of in addition, the also corresponding complicacy of operation.
Application number is the one Chinese patent application of 201110108547.X, discloses a kind of electrical control system of electric excavator, and it is a constant speed motor, and operating rate is unadjustable, can't carry out the power adjustment.
In addition, many use oil electric mixed dynamic systems in the prior art, but oily electric mixed tensor utilization rate is low, and area its utilization rate sufficient at electric energy still is not so good as electric excavator.
The utility model content
The utility model purpose is to solve the dependence of excavator work for a long time to fuel oil; And, reduce running cost through power control realization motor and variable pump rational power coupling, also reduce the consumption of electric energy simultaneously; Be a kind of more energy-conservation, the excavator of environmental protection.
To achieve these goals; The utility model has adopted following technical scheme: a kind of electric power hydraulic crawler excavator; Comprise the control system, said control system is made up of controller, main motor frequency conversion device, main motor, first pressure transmitter, second pressure transmitter, pioneer pump, first variable pump, second variable pump, first power governor, second power governor, electromagnetic proportional valve, rotary reducer, turning motor and revolution frequency converter;
Wherein main motor frequency conversion device is controlled by controller with the revolution frequency converter, main motor by the control of main motor frequency conversion device and turning motor by the revolution Frequency Converter Control; Said pioneer pump is communicated with by main driven by motor and with first variable pump and second variable pump; First power governor and second power governor are connected in parallel, and wherein an end of first power governor connects the oil-out of first variable pump, and an end of second power governor connects the oil-out of second variable pump; First power governor all is electrically connected with controller through electromagnetic proportional valve with the other end of second power governor; Said first variable pump is communicated with first pressure transmitter, and is electrically connected with controller through first pressure transmitter, and said second variable pump is communicated with second pressure transmitter, and is electrically connected with controller through second pressure transmitter;
Said main motor frequency conversion device and turning motor frequency converter are high-performance open loop vector frequency converter, are the devices that motor is carried out frequency control, it through with the controller communication, motor is carried out variable frequency regulating speed control.
Said main motor is a rare earth permanent-magnet synchronization motor, and its effect is to adopt 380V high-voltage fence electric energy, and drive main pump rotation under the control of frequency converter is for hydraulic system provides power.
Said turning motor is a rare earth permanent-magnet synchronization motor, and its effect is to adopt 380V high-voltage fence electric energy, drives rotary motor, for digger revolving provides power.
Said first variable pump and second variable pump are plunger type duplex swash plate variable pump.
The beneficial effect of the utility model is:
1. in the utility model; Pattern according to controller is set; Main motor frequency conversion device can carry out frequency control to motor so that control motor speed within the specific limits automatically according to the size of main motor load, and through controller adjustment electromagnetic proportional valve power is adjusted.Finally reach the rational Match between main motor speed and the variable pump pump oil mass, have simple to operate, high, the low characteristics of power consumption of main motor current utilization rate.
2. the electric power hydraulic crawler excavator of the utility model utilizes electrical network electric energy (380V) for excavator work power source to be provided; Be compared to diesel, more energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the overall structure sketch map of the excavator of the utility model:
Fig. 2 is the structural representation of the utility model control system.
1. electric power hydraulic crawler excavators, 2. control systems, 3. controllers among the figure; 4. main motor frequency conversion device; 5. main motor; 6. first pressure transmitter; 7. second pressure transmitter; 8. pioneer pump; 9. second variable pump; 10. second power governor; 11. first variable pump; 12. electromagnetic proportional valve; 13. first power governor; 14. rotary reducer; 15 turning motors; 16. revolution frequency converter
The specific embodiment
The whole system of the utility model comprises transfer of data and collection and treatment system; Form by surveillance and control system; The control system gathers the car load operational factor and working condition and warning message is carried out record, and surveillance realizes the demonstration to controller data.
With reference to Fig. 1 and Fig. 2, the electric hydaulic excavator control system 2 of the utility model is made up of controller 3, main motor frequency conversion device 4, main motor 5, first pressure transmitter 6, second pressure transmitter 7, pioneer pump 8, the first plunger type duplex swash plate variable pump 11, the second plunger type duplex swash plate variable pump 9, first power governor 13, second power governor 10, electromagnetic proportional valve 12, rotary reducer 14, turning motor 15, revolution frequency converter 16.
Wherein surveillance is a monitor, and monitor is covering on the driver's cabin through screw, and monitor is realized the demonstration to controller data.Controller passes through screw on the driver's cabin base plate; Main motor frequency conversion device 4 is through being bolted on excavator 1 puts on the shelf; Main motor 5 is through being bolted on the putting on the shelf of excavator 1, and first pressure transmitter 6 and second pressure transmitter 7, the first plunger type duplex swash plate variable pump 11 and the second plunger type duplex swash plate variable pump 9, first power governor 13 and second power governor 10 and electromagnetic proportional valve 11 are installed on the pioneer pump 8; Pioneer pump 8 is connected on the main motor 5 through shaft coupling, and turning motor 15 is connected on the rotary reducer 14 through key, connects the back and puts, turns round frequency converter 16 on the shelf through being bolted on the putting on the shelf of excavator 1 through what be bolted to excavator 1.
The effect of controller 3 is that the signal that first pressure transmitter 6 and second pressure transmitter 7 and main motor frequency conversion device 4, revolution frequency converter 15 are gathered is compared and make judgement; Send control instruction through the main motor of 4 pairs of main motor frequency conversion devices 5, revolution frequency converter 15 pairs of turning motors 14 with electromagnetic proportional valve 11 then; Thereby realize the rotating speed of main motor 5 and the rational Match of pioneer pump 8 pump oil masses, reach the purpose that improves power utilization; The effect of main motor frequency conversion device 4 is after receiving control instruction main motor 5 to be carried out frequency control, to reach the purpose of power match; Main motor 5 is connected with pioneer pump 8 through shaft coupling, and its effect is to be that hydraulic system provides power through the outside electric power network electric energy; First pressure transmitter 6 and second pressure transmitter 7 are installed on the pioneer pump 8, and its effect is an oil pressure of gathering pioneer pump, and pass to controller 3 after changing this pressure signal into the signal of telecommunication; The effect of pioneer pump 8 is the mobile power that provides for hydraulic system hydraulic oil; First power governor 13 and second power governor 10 are installed on the pioneer pump 8; Its effect is to regulate the fuel delivery of pioneer pump 8 according to the pressure signal of electromagnetic proportional valve 12 outputs, thereby reaches the purpose of power adjusting; First variable pump 11 and second variable pump 9 are installed on the pioneer pump 8, and its effect is the flow of control pioneer pump 8 hydraulic oil; The effect of turning motor 15 is the power supplys that receive outside electric power network 380V through conducting slip ring; For digger revolving provides power; The effect of revolution frequency converter 16 is to receive the controller instruction and turning motor 15 is carried out variable frequency regulating speed control, carries out variable frequency regulating speed control through the revolution of 14 pairs of excavators 1 of rotary reducer.
Main motor is a rare earth permanent-magnet synchronization motor, and its effect is to adopt 380V high-voltage fence electric energy, and drive main pump rotation under the control of frequency converter is for hydraulic system provides power.Turning motor is a rare earth permanent-magnet synchronization motor, and its effect is to adopt 380V high-voltage fence electric energy, drives rotary motor, for digger revolving provides power.Main motor frequency conversion device and turning motor frequency converter are high-performance open loop vector frequency converter, are the devices that motor is carried out frequency control, it through with the controller communication, motor is carried out variable frequency regulating speed control.First variable pump and second variable pump are conventional plunger type duplex swash plate variable pump.
The electric power hydraulic crawler excavator of the utility model; Can set according to the pattern of controller; Main motor frequency conversion device can be according to the size of main motor load; Automatically motor is carried out frequency control so that control motor speed within the specific limits, and power is adjusted through controller adjustment electromagnetic proportional valve.Finally reach the rational Match between main motor speed and the variable pump pump oil mass, have simple to operate, high, the low characteristics of power consumption of main motor current utilization rate.
The electric power hydraulic crawler excavator of the utility model utilizes electrical network electric energy (380V) for excavator work power source to be provided; Be compared to diesel, more energy-conserving and environment-protective.
Though the above-mentioned accompanying drawing that combines is described the specific embodiment of the utility model; But be not restriction to the utility model protection domain; One of ordinary skill in the art should be understood that; On the basis of the technical scheme of the utility model, those skilled in the art need not pay various modifications that creative work can make or distortion still in the protection domain of the utility model.
Claims (3)
1. electric power hydraulic crawler excavator; Comprise control system and surveillance, said control system is made up of controller, main motor frequency conversion device, main motor, first pressure transmitter, second pressure transmitter, pioneer pump, first variable pump, second variable pump, first power governor, second power governor, electromagnetic proportional valve, rotary reducer, turning motor and revolution frequency converter;
It is characterized in that said main motor frequency conversion device is controlled by controller with the revolution frequency converter, main motor by the control of main motor frequency conversion device and turning motor by the revolution Frequency Converter Control; Said pioneer pump is communicated with by main driven by motor and with first variable pump and second variable pump; First power governor and second power governor are connected in parallel, and wherein an end of first power governor connects the oil-out of first variable pump, and an end of second power governor connects the oil-out of second variable pump; First power governor all is electrically connected with controller through electromagnetic proportional valve with the other end of second power governor; Said first variable pump is communicated with first pressure transmitter, and is electrically connected with controller through first pressure transmitter, and said second variable pump is communicated with second pressure transmitter, and is electrically connected with controller through second pressure transmitter; Said surveillance is a monitor.
2. electric power hydraulic crawler excavator according to claim 1 is characterized in that, said main motor frequency conversion device and turning motor frequency converter are the open loop vector frequency converter, its through with the controller communication, motor is carried out variable frequency regulating speed control.
3. electric power hydraulic crawler excavator according to claim 1 and 2 is characterized in that, said turning motor is a rare earth permanent-magnet synchronization motor, and it adopts 380V high-voltage fence electric energy, drives rotary motor, for digger revolving provides power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120553047 CN202450561U (en) | 2011-12-27 | 2011-12-27 | Electric hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120553047 CN202450561U (en) | 2011-12-27 | 2011-12-27 | Electric hydraulic excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202450561U true CN202450561U (en) | 2012-09-26 |
Family
ID=46866432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120553047 Withdrawn - After Issue CN202450561U (en) | 2011-12-27 | 2011-12-27 | Electric hydraulic excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202450561U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433902A (en) * | 2011-12-27 | 2012-05-02 | 山重建机有限公司 | Electric hydraulic excvavtor |
| CN103603407A (en) * | 2013-10-22 | 2014-02-26 | 山重建机(济宁)有限公司 | Oil-electric powered hydraulic gripper control device |
| CN104120752A (en) * | 2014-07-08 | 2014-10-29 | 昆明理工大学 | Alternating current/storage battery dual-purpose electric excavator |
| CN104674877A (en) * | 2015-02-12 | 2015-06-03 | 徐州徐工挖掘机械有限公司 | Electric hydraulic excavator control system |
| CN110725360A (en) * | 2019-12-03 | 2020-01-24 | 湖南力诚新能源科技有限公司 | Hydraulic pump control device of electric excavator and control method of hydraulic pump |
-
2011
- 2011-12-27 CN CN 201120553047 patent/CN202450561U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433902A (en) * | 2011-12-27 | 2012-05-02 | 山重建机有限公司 | Electric hydraulic excvavtor |
| CN102433902B (en) * | 2011-12-27 | 2013-10-30 | 山重建机有限公司 | Electric hydraulic excvavtor |
| CN103603407A (en) * | 2013-10-22 | 2014-02-26 | 山重建机(济宁)有限公司 | Oil-electric powered hydraulic gripper control device |
| CN104120752A (en) * | 2014-07-08 | 2014-10-29 | 昆明理工大学 | Alternating current/storage battery dual-purpose electric excavator |
| CN104674877A (en) * | 2015-02-12 | 2015-06-03 | 徐州徐工挖掘机械有限公司 | Electric hydraulic excavator control system |
| CN110725360A (en) * | 2019-12-03 | 2020-01-24 | 湖南力诚新能源科技有限公司 | Hydraulic pump control device of electric excavator and control method of hydraulic pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120926 Effective date of abandoning: 20131030 |
|
| RGAV | Abandon patent right to avoid regrant |