CN103696455A - Electro-hydraulic mixed power device, excavator and method - Google Patents
Electro-hydraulic mixed power device, excavator and method Download PDFInfo
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- CN103696455A CN103696455A CN201310694773.XA CN201310694773A CN103696455A CN 103696455 A CN103696455 A CN 103696455A CN 201310694773 A CN201310694773 A CN 201310694773A CN 103696455 A CN103696455 A CN 103696455A
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Abstract
The invention discloses an electro-hydraulic mixed power device, an excavator and a method and belongs to the field of mechanical control. The mixed power device comprises an engine 1, a main pump 2, a first generator/motor 3, a second generator/motor 8 and a pump motor 13 which are sequentially connected and an energy accumulator 10, a pump motor 13 and an oil tank 14 which are sequentially connected to form a hydraulic oil loop. When the mixed power device is in the light load state or a rotation motor 6 brakes, the first generator/motor 3 or a generator 5 generates power and drives the second generator/motor 8 and the pump motor 13 to enable hydraulic oil to flow to the energy accumulator 10. Under the heavy load condition, the hydraulic oil in the energy accumulator 10 drives the pump motor 13, the second generator/motor 8, the first generator/motor 3 and the main pump 2. By means of the device, the excavator and the method, recyclable energy is converted into hydraulic energy from electric energy to be stored and utilized, the energy is recycled in a large range, waste is avoided, and cost and complete machine oil consumption are further reduced.
Description
Technical field
The invention belongs to plant equipment and manufacture field, relate to a kind of electrohydraulic mixed power device, relate in particular to electrohydraulic mixed power device, excavator and method for a kind of excavator.
Background technology
In the course of the work, the gyration inertia of slew gear is large, when retarding braking, can discharge a large amount of heats for hydraulic crawler excavator; When excavator is worked in underloading, engine output can not be absorbed by main pump completely, causes energy dissipation.
The hybrid excavator of currently available technology adopts single energy way of recycling conventionally, and capacity usage ratio is not high, has caused certain waste.
Summary of the invention
In view of this, the present invention can convert hydraulic energy to by electric energy for the energy reclaiming and preserves and be used, and can recover energy in a big way, prevent waste, and then lower 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, the second generator/motor, pump motor, accumulator and fuel tank, described motor, main pump, the first generator/motor, the second generator/motor is connected successively with pump motor, described accumulator, pump motor is connected successively and forms hydraulic oil circuit with fuel tank, in described hydraulic circuit, be provided with hydraulic oil, described pump motor drive hydraulic oil from fuel tank via pump motor to hydraulic oil accumulator or described accumulator via pump motor to fuel tank and drive described pump motor rotation.
Preferably, also comprise generator, also comprise rotary motor in described excavator, described rotary motor, generator and the second generator/motor are connected successively.
Preferably, between described the first generator/motor and the second generator/motor and generator and the second generator/motor, be also provided with inversion/rectifier.
Preferably, between described pump motor and accumulator, be also provided with transfer valve.
Preferably, on described accumulator, be 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, between described the second generator/motor and pump motor, be also provided with transmission device.
On the other hand, provide a kind of excavator, comprise electrohydraulic mixed power device as above.
On the other hand, provide a kind of electrohydraulic mixed power method of as above-mentioned electrohydraulic mixed power device, comprising:
When the braking of described rotary motor, described generator generate electricity and drive described the second generator/motor, described the second generator/motor to drive described pump motor to rotate and drive hydraulic oil from fuel tank via pump motor to accumulator;
When described excavator underloading, described in described motor driven the first generator/motor generate electricity and drive described the second generator/motor, described the second generator/motor to 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 via pump motor to fuel tank and drive the rotation of described pump motor, described pump motor drives described the second generator/motor to generate electricity and drives described the first generator/motor, and described the first generator/motor drives described main pump.
With respect to prior art, the advantage of technical scheme of the present invention has:
1, the recycling of slew gear inertia potential energy, by the conversion of electric energy, can be reclaimed 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 make engine operation in the lower region of energy consumption by being discharged into main pump, and then lowers complete machine oil consumption.
3, hydraulic accumulator power density is large, has solved the low problem of electric hybrid powering energy recovery rate, has reduced a high cost difficult problem that adopts super capacitor to recover energy.
Accompanying drawing explanation
The accompanying drawing that forms 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 is used 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 is that motor, 2 is that main pump, 3 is that the first electric generator/electric motor, 4 is that inversion/rectifier, 5 is that generator, 6 is that rotary motor, 8 is that the second electric generator/electric motor, 9 is that transmission device, 10 is that accumulator, 11 is that pressure sensor, 12 is that transfer valve, 13 is that pump motor, 14 is that fuel tank, 15 is controller.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the present invention can combine mutually.
Below with reference to accompanying drawing, embodiments of the invention are done to concrete explaination.
A kind of electrohydraulic mixed power device and the excavator of embodiments of the invention as shown in Figure 1.Excavator comprises connected motor 1 and main pump 2.Electrohydraulic mixed power device comprises the first generator/motor 3, the second generator/motor 8, pump motor 13, accumulator 10 and fuel tank 14.Motor 1, main pump 2, the first generator/motor 3, the second generator/motor 8 are connected successively with pump motor 13.Accumulator 10, pump motor 13 and fuel tank 14 are connected successively and form hydraulic oil circuit, are provided with hydraulic oil in hydraulic circuit.
Pump motor 13 drive hydraulic oil from fuel tank 14 via pump motor 13 to accumulator 10, or in accumulator 10 hydraulic oil via pump motor 13 to fuel tank 14 13 rotations of driving pump motor.
And preferably also comprise generator 5.In excavator, also comprise rotary motor 6.Rotary motor 6, generator 5 and the second generator/motor 8 are connected successively.
Electrohydraulic mixed power method, comprising:
When rotary motor 6 braking, generator 5 generate electricity and drive the second generator/motor 8, the second generator/motor 8 driving pump motors 13 to rotate and drive hydraulic oil from fuel tank 14 via pump motor 13 to accumulator 10;
When excavator underloading, motor 1 drive the first generator/motor 3 to generate electricity and drive the second generator/motor 8, the second generator/motor 8 driving pump motors 13 to 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 is via pump motor 13 to fuel tank 14 13 rotations of driving pump motor, and pump motor 13 drives the second generator/motor 8 generate electricity and drive the first generator/motor 3, the first generator/motor 3 Host actuating pumps 2.
Embodiments of the invention can convert hydraulic energy to by electric energy for the energy reclaiming and preserve and be used, and can recover energy in a big way, prevent waste, and then lower cost and complete machine oil consumption.
As shown in fig. 1, in an embodiment of the present invention, comprising:
The first energy way of recycling:
The second energy way of recycling:
Energy delivery mode:
When excavator is when severe duty is worked, if detecting accumulator 10 by pressure sensor 11, controller 15 stores more energy; Controller 15 is opened transfer valve 12, the hydraulic energy that accumulator 10 stores is by pump motor 13, pump motor 13 drives the second generator/motor 8 generatings, the electric energy that electric energy is reverse into burning voltage by inversion/rectifier 4 drives the first generator/motor 3, the first generator/motors 3 and the common Host actuating pump 2 of motor 1.Above process has completed the release of accumulator 10 energy;
When energy reclaims, the first electric generator/electric motor 3 is used as generator, and the second electric generator/electric motor 8 is used as motor, and pump motor 13 uses as hydraulic pump.
When energy discharges, the first electric generator/electric motor 3 is used as motor, and the second electric generator/electric motor 8 is used as generator, and pump motor 13 uses as hydraulic motor.
In embodiments of the invention, also comprise a kind of excavator, be provided with electrohydraulic mixed power device described above.Because above-mentioned electrohydraulic mixed power device has above-mentioned technique effect, therefore, the excavator that is 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.
Above specific embodiments of the invention be have been described in detail, 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 alternative also all among category of the present invention.Therefore, equalization conversion and the modification done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.
Claims (9)
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), the second generator/motor (8), pump motor (13), accumulator (10) and fuel tank (14), described motor (1), main pump (2), the first generator/motor (3), the second generator/motor (8) is connected successively with pump motor (13), described accumulator (10), pump motor (13) is connected successively and forms hydraulic oil circuit with fuel tank (14), in described hydraulic circuit, be provided with hydraulic oil, described pump motor (13) drive hydraulic oil from fuel tank (14) via pump motor (13) to hydraulic oil accumulator (10) or described accumulator (10) via pump motor (13) to fuel tank (14) and drive described pump motor (13) to rotate.
2. electrohydraulic mixed power device as claimed in claim 1, is characterized in that, also comprises generator (5), also comprises rotary motor (6) in described excavator, and described rotary motor (6), generator (5) and the second generator/motor (8) are connected successively.
3. electrohydraulic mixed power device as claimed in claim 2, is characterized in that, between described the first generator/motor (3) and the second generator/motor (8) and generator (5) and the second generator/motor (8), is also provided with inversion/rectifier (4).
4. electrohydraulic mixed power device as claimed in claim 3, is characterized in that, between described pump motor (13) and accumulator (10), is also provided with transfer valve (12).
5. electrohydraulic mixed power device as claimed in claim 4, is characterized in that, is also provided with pressure sensor (11) on described accumulator (10).
6. electrohydraulic mixed power device as claimed in claim 5, it is characterized in that, also comprise controller (15), described controller (15) is connected 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) and pressure sensor (11) respectively.
7. electrohydraulic mixed power device as claimed in claim 1, is characterized in that, between described the second generator/motor (8) and pump motor (13), is also provided with transmission device (9).
8. an excavator, is characterized in that, comprises the electrohydraulic mixed power device as described in claim 1 to 7 any one.
9. an electrohydraulic mixed power method for electrohydraulic mixed power device as claimed in claim 2, is characterized in that, comprising:
When described rotary motor (6) is braked, described generator (5) generate electricity and drive described the second generator/motor (8), described the second generator/motor (8) to 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 the first generator/motor (3) to generate electricity and drives described the second generator/motor (8), described the 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, in described accumulator (10) hydraulic oil via pump motor (13) to fuel tank (14) and drive described pump motor (13) rotation, described pump motor (13) drives described the second generator/motor (8) to generate electricity and drives described the first generator/motor (3), and described the 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 true CN103696455A (en) | 2014-04-02 |
| CN103696455B CN103696455B (en) | 2016-03-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1025608B1 (en) * | 2017-05-31 | 2019-04-29 | Chen Tai Financial Leasing (Shanghai) Co., Ltd. | DRIVE SYSTEM OF A LIFTING EQUIPMENT |
| CN111425466A (en) * | 2020-04-13 | 2020-07-17 | 三一重机有限公司 | Hydraulic energy storage loop and engineering machinery |
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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 |
| CN103215982A (en) * | 2013-04-16 | 2013-07-24 | 三一重机有限公司 | Hybrid-powered rotation driving system and construction machinery |
-
2013
- 2013-12-16 CN CN201310694773.XA patent/CN103696455B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103215982A (en) * | 2013-04-16 | 2013-07-24 | 三一重机有限公司 | Hybrid-powered rotation driving system and construction machinery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1025608B1 (en) * | 2017-05-31 | 2019-04-29 | Chen Tai Financial Leasing (Shanghai) Co., Ltd. | DRIVE SYSTEM OF A LIFTING EQUIPMENT |
| CN111425466A (en) * | 2020-04-13 | 2020-07-17 | 三一重机有限公司 | Hydraulic energy storage loop and engineering machinery |
| 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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| CN103696455B (en) | 2016-03-02 |
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