CN103696455B - A kind of electrohydraulic mixed power device, excavator and method - Google Patents
A kind of electrohydraulic mixed power device, excavator and method Download PDFInfo
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- CN103696455B CN103696455B CN201310694773.XA CN201310694773A CN103696455B CN 103696455 B CN103696455 B CN 103696455B CN 201310694773 A CN201310694773 A CN 201310694773A CN 103696455 B CN103696455 B CN 103696455B
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Abstract
The invention discloses a kind of electrohydraulic mixed power device, excavator and method, belong to Mechanical course field, comprise the motor 1, main pump 2, first generator/motor 3, second generator/motor 8 and the pump motor 13 that are connected successively.Be connected successively and form the accumulator 10 of hydraulic oil circuit, pump motor 13 and fuel tank 14.When underloading or rotary motor 6 are braked, the first generator/motor 3 or generator 5 generate electricity and drive the second generator/motor 8, pump motor 13 and make hydraulic oil to accumulator 10; During heavy duty, hydraulic oil driving pump motor 13, second generator/motor 8, first generator/motor 3 and main pump 2 in accumulator 10.Technical scheme of the present invention can convert hydraulic energy for the energy reclaimed to by electric energy and preserves and be used, and can recover energy in a big way, prevent waste, and then reduce cost and complete machine oil consumption.
Description
Technical field
The invention belongs to plant equipment and manufacture field, relate to a kind of electrohydraulic mixed power device, particularly relate to a kind of excavator electrohydraulic mixed power device, excavator and method.
Background technology
In the course of the work, the gyration inertia of slew gear is large, can discharge a large amount of heats when retarding braking for hydraulic crawler excavator; Excavator is when underloading works, and engine output can not be absorbed by main pump completely, causes energy dissipation.
The hybrid excavator of currently available technology adopts single energy regenerating mode usually, and capacity usage ratio is not high, causes certain waste.
Summary of the invention
In view of this, the present invention can convert hydraulic energy for the energy reclaimed to by electric energy and preserves and be used, and can recover energy in a big way, prevent waste, and then reduce cost and complete machine oil consumption.
For achieving the above object, concrete technical scheme is as follows:
On the one hand, a kind of electrohydraulic mixed power device is provided, be applicable to excavator, described excavator comprises connected motor and main pump, described electrohydraulic mixed power device comprises the first generator/motor, second generator/motor, pump motor, accumulator and fuel tank, described motor, main pump, first generator/motor, second generator/motor is connected successively with pump motor, described accumulator, pump motor and fuel tank are connected successively and form hydraulic oil circuit, hydraulic oil is provided with in described hydraulic oil circuit, described pump motor to drive hydraulic oil to drive described pump motor to rotate via pump motor to fuel tank via hydraulic oil pump motor to accumulator or described accumulator from fuel tank.
Preferably, also comprise generator, also comprise rotary motor in described excavator, described rotary motor, generator are connected successively with the second generator/motor.
Preferably, described first generator/motor and the second generator/motor and be also provided with inversion/rectifier between generator and the second generator/motor.
Preferably, also transfer valve is provided with between described pump motor and accumulator.
Preferably, described accumulator is also provided with pressure sensor.
Preferably, also comprise controller, described controller is connected with pressure sensor with described generator, the first generator/motor, inversion/rectifier, generator, the second generator/motor, pump motor, transfer valve respectively.
Preferably, also transmission device is provided with between described second generator/motor and pump motor.
On the other hand, provide a kind of excavator, comprise electrohydraulic mixed power device as above.
On the other hand, a kind of electrohydraulic mixed power method as above-mentioned electrohydraulic mixed power device is provided, comprises:
When the braking of described rotary motor, described electrical power generators also drives described second generator/motor, described second generator/motor drive described pump motor to rotate and drive hydraulic oil from fuel tank via pump motor to accumulator;
When described excavator underloading, the first generator/motor described in described motor driven generates electricity and drives described second generator/motor, described second generator/motor drive described pump motor to rotate and drive hydraulic oil from fuel tank via pump motor to accumulator;
When described excavator heavy duty, in described accumulator, hydraulic oil drives described pump motor to rotate via pump motor to fuel tank, described pump motor drives described second generator/motor generate electricity and drive described first generator/motor, and described first generator/motor drives described main pump.
Relative to prior art, the advantage of technical scheme of the present invention has:
1, the recycling of slew gear inertia potential energy is by the conversion of electric energy, can reclaim the inertia potential energy of slew gear in a big way;
2, motor excess energy can be recovered to accumulator by motor, and the energy that accumulator stores can by being discharged into main pump, makes engine operation in the lower region of energy consumption, and then lowers complete machine oil consumption.
3, hydraulic accumulator power density is large, solves the problem that electric hybrid powering energy recovery rate is low, reduces the high cost difficult problem adopting super capacitor to recover energy.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the embodiment of the present invention.
Wherein, 1 be motor, 2 be inversion/rectifier for main pump, 3 is the first electric generator/electric motor, 4,5 be generator, 6 be transmission device for rotary motor, 8 is the second electric generator/electric motor, 9,10 be accumulator, 11 be pressure sensor, 12 be transfer valve, 13 be pump motor, 14 be fuel tank, 15 for controller.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Below with reference to accompanying drawing, concrete explaination is done to embodiments of the invention.
A kind of electrohydraulic mixed power device of embodiments of the invention as shown in Figure 1 and excavator.Excavator comprises connected motor 1 and main pump 2.Electrohydraulic mixed power device comprises the first generator/motor 3, second generator/motor 8, pump motor 13, accumulator 10 and fuel tank 14.Motor 1, main pump 2, first generator/motor 3, second generator/motor 8 are connected successively with pump motor 13.Accumulator 10, pump motor 13 are connected successively with fuel tank 14 and form hydraulic oil circuit, are provided with hydraulic oil in hydraulic oil circuit.
Pump motor 13 drives hydraulic oil from fuel tank 14 via pump motor 13 to accumulator 10, or in accumulator 10, hydraulic oil rotates via pump motor 13 to fuel tank 14 driving pump motor 13.
And preferably also comprise generator 5.Rotary motor 6 is also comprised in excavator.Rotary motor 6, generator 5 are connected successively with the second generator/motor 8.
Electrohydraulic mixed power method, comprising:
When rotary motor 6 is braked, generator 5 generates electricity and drives the second generator/motor 8, second generator/motor 8 driving pump motor 13 rotate and drive hydraulic oil from fuel tank 14 via pump motor 13 to accumulator 10;
When excavator underloading, motor 1 drives the first generator/motor 3 to generate electricity and drives the second generator/motor 8, second generator/motor 8 driving pump motor 13 rotate and drive hydraulic oil from fuel tank 14 via pump motor 13 to accumulator 10;
When excavator heavy duty, in accumulator 10, hydraulic oil rotates via pump motor 13 to fuel tank 14 driving pump motor 13, and pump motor 13 drives the second generator/motor 8 to generate electricity and drives the first generator/motor 3, first generator/motor 3 Host actuating pump 2.
Embodiments of the invention can convert hydraulic energy for the energy reclaimed to by electric energy and preserve and be used, and can recover energy in a big way, prevent waste, and then reduce cost and complete machine oil consumption.
As shown in fig. 1, in an embodiment of the present invention, comprising:
First energy regenerating mode:
By pressure sensor 11, controller 15 detects that accumulator 10 does not have storage power, or the energy stored is little; When rotary motor 6 is braked, pivotal inertia potential energy drive electrical generators 5.Controller 15 controls generator 5 and generates electricity, and the electric energy that electric energy is reverse into burning voltage by inversion/rectifier 4 drives the second generator/motor 8, second generator/motor 8 to drive pump motor 13 by transmission device 9.Transfer valve 12 opened by controller 15, and pump motor 13 becomes hydraulic energy to be stored in accumulator 10 electric energy conversion.Above process completes the recovery of the inertia potential energy of rotary motor 6;
Second energy regenerating mode:
By pressure sensor 11, controller 15 detects that accumulator 10 does not have storage power, or the energy stored is little; Excavator is when light duty works, controller 15 controls the first generator/motor 3 and generates electricity, the electric energy that electric energy is reverse into burning voltage by inversion/rectifier 4 drives the second generator/motor 8, second generator/motor 8 to drive pump motor 13 by transmission device 9.Transfer valve 12 opened by controller 15, and pump motor 13 becomes hydraulic energy to be stored in accumulator 10 electric energy conversion.Above process completes the recovery of motor 1 excess energy;
Fault offset mode:
When excavator works at severe duty, if by pressure sensor 11, controller 15 detects that accumulator 10 stores comparatively multi-energy; Transfer valve 12 opened by controller 15, the hydraulic energy that accumulator 10 stores is by pump motor 13, pump motor 13 drives the second generator/motor 8 to generate electricity, electric energy is reverse into electrical energy drive first generator/motor 3, first generator/motor 3 Host actuating pump 2 common with motor 1 of burning voltage by inversion/rectifier 4.Above process completes the release of accumulator 10 energy;
When energy regenerating, the first electric generator/electric motor 3 uses as generator, and the second electric generator/electric motor 8 uses as motor, and pump motor 13 uses as hydraulic pump.
When fault offset, the first electric generator/electric motor 3 uses as motor, and the second electric generator/electric motor 8 uses as generator, and pump motor 13 uses as hydraulic motor.
Also comprise a kind of excavator in embodiments of the invention, be provided with electrohydraulic mixed power device described above.Because above-mentioned electrohydraulic mixed power device has above-mentioned technique effect, therefore, the excavator being provided with this electrohydraulic mixed power device also should possess corresponding technique effect, and its specific implementation process is similar to the above embodiments, does not hereby repeat.
Be described in detail specific embodiments of the invention above, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and substituting also all among category of the present invention.Therefore, equalization conversion done without departing from the spirit and scope of the invention and amendment, all should contain within the scope of the invention.
Claims (8)
1. an electrohydraulic mixed power device, be applicable to excavator, described excavator comprises connected motor (1) and main pump (2), it is characterized in that, described electrohydraulic mixed power device comprises the first generator/motor (3), second generator/motor (8), pump motor (13), accumulator (10) and fuel tank (14), described motor (1), main pump (2), first generator/motor (3), second generator/motor (8) is connected successively with pump motor (13), described accumulator (10), pump motor (13) is connected successively with fuel tank (14) and forms hydraulic oil circuit, hydraulic oil is provided with in described hydraulic oil circuit, described pump motor (13) to drive hydraulic oil to drive described pump motor (13) to rotate via pump motor (13) to fuel tank (14) via hydraulic oil pump motor (13) to accumulator (10) or described accumulator (10) from fuel tank (14), described electrohydraulic mixed power device also comprises generator (5), rotary motor (6) is also comprised in described excavator, described rotary motor (6), generator (5) is connected successively with the second generator/motor (8).
2. electrohydraulic mixed power device as claimed in claim 1, it is characterized in that, described first generator/motor (3) and the second generator/motor (8) and be also provided with inversion/rectifier (4) between generator (5) and the second generator/motor (8).
3. electrohydraulic mixed power device as claimed in claim 2, is characterized in that, be also provided with transfer valve (12) between described pump motor (13) and accumulator (10).
4. electrohydraulic mixed power device as claimed in claim 3, is characterized in that, described accumulator (10) is also provided with pressure sensor (11).
5. electrohydraulic mixed power device as claimed in claim 4, it is characterized in that, also comprise controller (15), described controller (15) is connected with pressure sensor (11) with described generator (5), the first generator/motor (3), inversion/rectifier (4), generator (5), the second generator/motor (8), pump motor (13), transfer valve (12) respectively.
6. electrohydraulic mixed power device as claimed in claim 1, is characterized in that, be also provided with transmission device (9) between described second generator/motor (8) and pump motor (13).
7. an excavator, is characterized in that, comprises the electrohydraulic mixed power device as described in any one of claim 1 to 6.
8. an electrohydraulic mixed power method for electrohydraulic mixed power device as claimed in claim 1, is characterized in that, comprising:
When described rotary motor (6) is braked, described generator (5) generates electricity and drives described second generator/motor (8), described second generator/motor (8) drive described pump motor (13) to rotate and drive hydraulic oil from fuel tank (14) via pump motor (13) to accumulator (10);
When described excavator underloading, described motor (1) drives described first generator/motor (3) to generate electricity and drives described second generator/motor (8), described second generator/motor (8) drive described pump motor (13) to rotate and drive hydraulic oil from fuel tank (14) via pump motor (13) to accumulator (10);
When described excavator heavy duty, hydraulic oil drives described pump motor (13) to rotate via pump motor (13) to fuel tank (14) in described accumulator (10), described pump motor (13) drives described second generator/motor (8) to generate electricity and drives described first generator/motor (3), and described first generator/motor (3) drives described main pump (2).
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| CN201310694773.XA CN103696455B (en) | 2013-12-16 | 2013-12-16 | A kind of electrohydraulic mixed power device, excavator and method |
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| CN201310694773.XA CN103696455B (en) | 2013-12-16 | 2013-12-16 | A kind of electrohydraulic mixed power device, excavator and method |
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| CN103696455A CN103696455A (en) | 2014-04-02 |
| CN103696455B true CN103696455B (en) | 2016-03-02 |
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| CN108975235B (en) * | 2017-05-31 | 2020-11-06 | 北谷电子有限公司 | Power system of lifting device and control method thereof |
| CN111425466B (en) * | 2020-04-13 | 2021-11-30 | 三一重机有限公司 | Hydraulic energy storage loop and engineering machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006055978A1 (en) * | 2004-11-22 | 2006-05-26 | Bosch Rexroth Corporation | Hydro-electric hybrid drive system for motor vehicle |
| WO2012102654A1 (en) * | 2011-01-27 | 2012-08-02 | Parker Hannifin Ab | Hyraulic accumulator system |
| CN102864811A (en) * | 2012-10-22 | 2013-01-09 | 三一重机有限公司 | Energy storage hydraulic system and excavator using same |
| CN103215982B (en) * | 2013-04-16 | 2015-10-14 | 三一重机有限公司 | Hybrid power gyroscopic drive system and engineering machinery |
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