CN109080454A - A kind of electro-hydraulic drive system reducing power of motor - Google Patents
A kind of electro-hydraulic drive system reducing power of motor Download PDFInfo
- Publication number
- CN109080454A CN109080454A CN201810966236.9A CN201810966236A CN109080454A CN 109080454 A CN109080454 A CN 109080454A CN 201810966236 A CN201810966236 A CN 201810966236A CN 109080454 A CN109080454 A CN 109080454A
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- Prior art keywords
- hydraulic
- motor
- electro
- valve
- entrance
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- 239000003921 oil Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 5
- 230000001133 acceleration Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/12—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of electric gearing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
Abstract
The invention belongs to electro-hydraulic combination drive technical fields, a kind of electro-hydraulic drive system for reducing power of motor is disclosed, respectively driving two motors due to accumulator and motor for existing electro-hydraulic hybrid drive system when causing to there is a problem that installation and difficult arrangement and vehicle accelerate for vehicle lesser for chassis, power of motor is big.The present invention includes battery, inverter, motor, hydraulic pump and hydraulic motor, the battery is electrically connected with inverter, inverter is connected to motor, the output axis connection hydraulic pump of motor, A mouthfuls and B mouthfuls of two actuator ports of the entrance and exit of hydraulic pump and 3-position 4-way electro-hydraulic proportional valve are connected to, the P mouth of 3-position 4-way electro-hydraulic proportional valve is connected with high pressure accumulator, and the entrance and exit of hydraulic pump is also communicated with hydraulic valve block, and hydraulic valve block is connected to the entrance and exit of hydraulic motor.
Description
Technical field
The invention belongs to electro-hydraulic actuation techniques fields, and in particular to a kind of electro-hydraulic drive system for reducing power of motor.
Background technique
Electric vehicle has zero-emission, low noise and other advantages, and developing electrokinetic technique can effectively solve the problem that energy source of car and environment
The problems such as pollution, is beneficial to energy conservation emission reduction.
The main thought of electro-hydraulic hybrid dynamic system is exactly the high pressure stored when loading and increasing using high pressure accumulator release
Hydraulic oil provides hydraulic power electrical machine with power under identical load power demand and reduces naturally.
The mode of existing electro-hydraulic hybrid dynamic system, electrical power and hydraulic power coupling is motor, hydraulic pump driving one
A servo-motor is operated alone in motor, accumulator, and two motors drive load jointly.But this electro-hydraulic hybrid dynamic system for
For the too small vehicle of the chassis such as electric bus or municipal refuse vehicle, due to needing to configure two hydraulic motors, to lead
It causes Hydraulic Elements more, so that for the vehicle of floor underframe for vehicle size, there is arrangement and difficult to install.
Simultaneously because in the driving branch roads system of two motor drivings, motor-hydraulic pump and hydraulic motor driving composition, liquid
Press pump entrance generally connects low tension loop, and pressure is basically unchanged, admittedly the pressure of only hydraulic pump outlet (that is to say, hydraulic motor entrance)
Power increases, since hydrostatic rotational efficienty is not inherently very high, so that power input to a machine is more than pure motor driven
Height, in this way energy consumption increase.
Summary of the invention
The present invention causes pair to solve existing electro-hydraulic hybrid drive system since accumulator and motor respectively drive two motors
It there is a problem that power of motor is big when installation and difficult arrangement and vehicle accelerate for the lesser vehicle of chassis, and provide
A kind of electro-hydraulic drive system reducing power of motor, it is (such as electronic to meet the lesser vehicle of chassis to reduce Hydraulic Elements
Bus and municipal refuse vehicle etc.) arrangement and installation, while by accumulator can reduce vehicle operation when motor power,
Achieve the purpose that improve service lifetime of accumulator and palpus cruising ability.
In order to solve the technical problem, the technical scheme adopted by the invention is that:
A kind of electro-hydraulic drive system reducing power of motor, including battery, inverter, motor, hydraulic pump and hydraulic motor, institute
Battery is stated to be electrically connected with inverter, inverter is connected to motor, the output axis connection hydraulic pump of motor, the entrance of hydraulic pump and
It exports and is connected to A mouthfuls and B mouthfuls of two actuator ports of 3-position 4-way electro-hydraulic proportional valve, the P mouth company of 3-position 4-way electro-hydraulic proportional valve
Be connected to high pressure accumulator, the entrance and exit of hydraulic pump is also communicated with hydraulic valve block, the entrance of hydraulic valve block and hydraulic motor and
Outlet.
Low pressure accumulator is also communicated on the hydraulic valve block.
The hydraulic valve block includes two-position two-way electromagnetic directional valve and overflow valve, the two-position two-way electromagnetic directional valve series connection
It is connected to the entrance of hydraulic pump and the outlet connecting pipe road of hydraulic motor, the low pressure accumulator is connected in bi-bit bi-pass in parallel
On connecting line between solenoid directional control valve and the outlet of hydraulic motor；The Single port of the overflow valve is connected to bi-bit bi-pass electricity
On connecting line between magnetic reversal valve and low pressure accumulator, the another port of the overflow valve is connected to the electro-hydraulic ratio of 3-position 4-way
On connecting line between example valve and the entrance of hydraulic motor.
The tie point of the 3-position 4-way electro-hydraulic proportional valve and hydraulic pump inlet is located at hydraulic pump inlet and bi-bit bi-pass electricity
On connecting line between magnetic reversal valve.
Compared with prior art, the invention has the following advantages:
The electro-hydraulic drive system of reduction power of motor of the invention, the drive being made of motor, accumulator, hydraulic pump, hydraulic motor
Dynamic system is only used only a hydraulic motor and vehicle is driven to be moved, so that Hydraulic Elements are greatly reduced, especially suitable for
The lesser vehicle of chassis (such as electric bus and municipal refuse vehicle etc.) uses, installation and cloth convenient for the lesser vehicle of chassis
It sets, achievees the purpose that reduce cost.
The present invention in use when vehicle demand power increases, is stored by high pressure accumulator by high pressure simultaneously
Energy device changes the pressure of hydraulic pump inlet, although the outlet pressure of hydraulic pump is changed, hydraulic pump outlet and entrance
Between pressure difference do not change and perhaps vary less i.e. power of motor and do not increase or increase seldom, can but reach acceleration
Purpose so that the power of motor vehicle accelerate when do not increase or increase seldom, thus compared with the prior art
Power of motor when vehicle accelerates is reduced, the cruising ability of battery is improved.
The present invention passes through the connection of high pressure accumulator and 3-position 4-way electro-hydraulic proportional valve and hydraulic pump, it can by liquid
The mode that press pump entrance is drained the oil changes the inlet pressure of hydraulic pump, can also drain the oil to form interflow by the outlet in hydraulic pump
Mode change the output power of hydraulic pump so that the present invention has the characteristics that control flexible operation, can satisfy not
With the configuration requirement of vehicle.
Detailed description of the invention
Fig. 1 is the principle of the present invention block diagram；
Fig. 2 is the functional block diagram of one embodiment of the invention；
Marked in the figure: 1, battery, 2, inverter, 3, motor, 4, hydraulic pump, 5,3-position 4-way electro-hydraulic proportional valve, 6, high pressure storage
Can device, 7, hydraulic valve block, 71, two-position two-way electromagnetic directional valve, 72, overflow valve, 8, low pressure accumulator, 9, hydraulic motor, 10, subtract
Fast device, 11, wheel.
Specific embodiment
The present invention will be further described with reference to the examples below, and described embodiment is only present invention a part
Embodiment is not whole embodiment.Based on the embodiments of the present invention, those skilled in the art are not making
Other embodiments used obtained, belong to protection scope of the present invention under the premise of creative work.
In conjunction with attached drawing, the electro-hydraulic drive system of reduction power of motor of the invention, including battery 1, inverter 2, motor
3, hydraulic pump 4 and hydraulic motor 9, the battery 1 are electrically connected with inverter 2, and inverter 2 is connect with motor 3, motor 3 it is defeated
Axis connection hydraulic pump 4 out, the entrance and exit of hydraulic pump 4 and A mouthfuls of two actuator ports of 3-position 4-way electro-hydraulic proportional valve 5 and B
Mouth connection, the P mouth of 3-position 4-way electro-hydraulic proportional valve 5 are connected with high pressure accumulator 6, and the entrance and exit of hydraulic pump 1 is also communicated with
Hydraulic valve block 7, hydraulic valve block 7 are connected to the entrance and exit of hydraulic motor 9, wherein battery, inverter, motor, hydraulic pump,
Hydraulic motor, high pressure accumulator and 3-position 4-way electro-hydraulic proportional valve belong to prior art products, and those skilled in the art is
It can be appreciated that and understand, details are not described herein.The output shaft of hydraulic motor is connected with retarder 10, and hydraulic motor delivers power to
Retarder 10, retarder imparts power to wheel 11 again, so that vehicle be driven to advance.
Low pressure accumulator 8 is also communicated on the hydraulic valve block 7.The present invention passes through low pressure accumulator and high pressure accumulator also
Energy during vehicle braking can be recycled, further decrease the energy consumption of vehicle.
As a kind of preferred mode of the present invention, the hydraulic valve block 7 includes two-position two-way electromagnetic directional valve 71 and overflow
Valve 72, the two-position two-way electromagnetic directional valve 71 are connected in series in the entrance of hydraulic pump 4 and the outlet connecting pipe road of hydraulic motor 9
On, the low pressure accumulator 8 is connected in the connecting tube between two-position two-way electromagnetic directional valve 71 and the outlet of hydraulic motor 9 in parallel
On the road；The Single port of the overflow valve 72 is connected to the connecting tube between two-position two-way electromagnetic directional valve 71 and low pressure accumulator 8
On the road, the another port of the overflow valve 72 is connected to the company between 3-position 4-way electro-hydraulic proportional valve 5 and the entrance of hydraulic motor 9
Adapter tube road.
The tie point of the 3-position 4-way electro-hydraulic proportional valve 5 and 4 entrance of hydraulic pump is located at 5 entrance of hydraulic pump and bi-bit bi-pass
On connecting line between solenoid directional control valve 71.
In conjunction with Fig. 2, electro-hydraulic drive system of the invention is further elaborated；
Power needed for the acceleration of vehicle is P1, and when using mixed dynamic, it is P2 that accumulator, which provides power, and motor provides function at this time
Rate is P3, P1=P2+P3, if the load of pure motor driven accelerates, power is just P1, is greater than P2's naturally.
The output power general expression of hydraulic pump when normal driving are as follows: Pp=Δ pV/2 π=(pOutlet-pEntrance) V/2 π,
Middle PpIndicate that power, V indicate discharge capacity, the pressure difference of Δ p pump inlet and outlet, pOutletPump discharge pressure, pEntrancePump inlet pressure.
In the prior art, when external power increase in demand, P is also meaned thatpIncrease, discharge capacity is constant, hydraulic to be pumped into
The general knot low tension loop of mouth, pressure is basically unchanged, therefore the pressure increase of only pump discharge i.e. motor inlet, hydrostatic biography
Efficiency of movement be not inherently it is very high, it is higher than pure electric drive to allow for power input to a machine in this way, and energy consumption in this way increases.
And the present invention, when external demand power increases, is changed by high pressure accumulator 6 and 3-position 4-way electro-hydraulic proportional valve 5
Become pump inlet pressure pEntranceAlthough pOutletIt increases, but Δ p does not still have without variation or amplification very little, i.e. power of motor
Increase or increase seldom, but reaches the purpose of acceleration.According to the conservation of energy, power of motor does not increase, and the energy of acceleration comes
The high-voltage oil liquid released derived from high pressure accumulator, so that the present invention reduces electricity when vehicle accelerates by high pressure accumulator
The power of machine, to improve the cruising ability of battery.
In conclusion the electro-hydraulic drive system of reduction power of motor of the invention, by motor, accumulator, hydraulic pump, hydraulic
The drive system of motor composition is only used only a hydraulic motor and vehicle is driven to be moved, to greatly reduce hydraulic member
Part is used especially suitable for the lesser vehicle of chassis (such as electric bus and municipal refuse vehicle etc.), lesser convenient for chassis
The installation and arrangement of vehicle, achieve the purpose that reduce cost.
The present invention in use when vehicle demand power increases, is stored by high pressure accumulator by high pressure simultaneously
Energy device changes the pressure of hydraulic pump inlet, although the outlet pressure of hydraulic pump is changed, hydraulic pump outlet and entrance
Between pressure difference do not change and perhaps vary less i.e. power of motor and do not increase or increase seldom, can but reach acceleration
Purpose so that the power of motor vehicle accelerate when do not increase or increase seldom, thus compared with the prior art
Power of motor when vehicle accelerates is reduced, the cruising ability of battery is improved.
The present invention passes through the connection of high pressure accumulator and 3-position 4-way electro-hydraulic proportional valve and hydraulic pump, it can by liquid
The mode that press pump entrance is drained the oil changes the inlet pressure of hydraulic pump, can also drain the oil to form interflow by the outlet in hydraulic pump
Mode change the output power of hydraulic pump so that the present invention has the characteristics that control flexible operation, can satisfy not
With the configuration requirement of vehicle.
Claims (4)
1. a kind of electro-hydraulic drive system for reducing power of motor, including battery (1), inverter (2), motor (3), hydraulic pump
(4) it is electrically connected with hydraulic motor (9), the battery (1) with inverter (2), inverter (2) is connect with motor (3), motor
It exports axis connection hydraulic pump (4), the entrance and exit of hydraulic pump (4) and two working oils of 3-position 4-way electro-hydraulic proportional valve (5)
A mouthfuls of mouth is connected to B mouthfuls, and the P mouth of 3-position 4-way electro-hydraulic proportional valve (5) is connected with high pressure accumulator (6), the entrance of hydraulic pump (4)
It is also communicated with hydraulic valve block (7) with outlet, hydraulic valve block (7) is connected to the entrance and exit of hydraulic motor (9).
2. the electro-hydraulic drive system according to claim 1 for reducing power of motor, which is characterized in that the hydraulic valve block
(7) low pressure accumulator (8) are also communicated on.
3. the electro-hydraulic drive system according to claim 2 for reducing power of motor, which is characterized in that the hydraulic valve block
It (7) include two-position two-way electromagnetic directional valve (71) and overflow valve (72), the two-position two-way electromagnetic directional valve (71) is connected in series
In the entrance of hydraulic pump (4) and the outlet connecting pipe road of hydraulic motor (9), the low pressure accumulator (8) is connected in two in parallel
On connecting line between two electric change valves of position (71) and the outlet of hydraulic motor (9)；One end of the overflow valve (72)
Mouth is connected on the connecting line between two-position two-way electromagnetic directional valve (71) and low pressure accumulator (8), the overflow valve (72)
Another port be connected on the connecting line between 3-position 4-way electro-hydraulic proportional valve (5) and the entrance of hydraulic motor (4).
4. the electro-hydraulic drive system according to claim 3 for reducing power of motor, which is characterized in that the 3-position 4-way electricity
Connecting tube of the tie point of liquid proportional valve (5) and hydraulic pump inlet between hydraulic pump inlet and two-position two-way electromagnetic directional valve
On the road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810966236.9A CN109080454A (en) | 2018-08-23 | 2018-08-23 | A kind of electro-hydraulic drive system reducing power of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810966236.9A CN109080454A (en) | 2018-08-23 | 2018-08-23 | A kind of electro-hydraulic drive system reducing power of motor |
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| CN109080454A true CN109080454A (en) | 2018-12-25 |
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| CN201810966236.9A Pending CN109080454A (en) | 2018-08-23 | 2018-08-23 | A kind of electro-hydraulic drive system reducing power of motor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380359A (en) * | 2019-07-09 | 2019-10-25 | 西南交通大学 | A kind of railcar for Metro Cable laying |
| CN110667375A (en) * | 2019-10-29 | 2020-01-10 | 倪天新 | Hydraulic transmission device for pure electric vehicle |
| CN111976471A (en) * | 2020-08-09 | 2020-11-24 | 肇庆高新区伙伴汽车技术有限公司 | Method for improving cost performance of new energy automobile and automatic transmission automobile |
| CN111981122A (en) * | 2020-08-09 | 2020-11-24 | 肇庆高新区伙伴汽车技术有限公司 | Automatic transmission automobile without clutch gearbox |
| CN111998068A (en) * | 2020-08-09 | 2020-11-27 | 肇庆高新区伙伴汽车技术有限公司 | Sliding vane type hydraulic driver |
| CN113580912A (en) * | 2021-09-07 | 2021-11-02 | 浙江大学 | Series-type electro-hydraulic hybrid power system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380359A (en) * | 2019-07-09 | 2019-10-25 | 西南交通大学 | A kind of railcar for Metro Cable laying |
| CN110667375A (en) * | 2019-10-29 | 2020-01-10 | 倪天新 | Hydraulic transmission device for pure electric vehicle |
| CN111976471A (en) * | 2020-08-09 | 2020-11-24 | 肇庆高新区伙伴汽车技术有限公司 | Method for improving cost performance of new energy automobile and automatic transmission automobile |
| CN111981122A (en) * | 2020-08-09 | 2020-11-24 | 肇庆高新区伙伴汽车技术有限公司 | Automatic transmission automobile without clutch gearbox |
| CN111998068A (en) * | 2020-08-09 | 2020-11-27 | 肇庆高新区伙伴汽车技术有限公司 | Sliding vane type hydraulic driver |
| CN111976471B (en) * | 2020-08-09 | 2022-01-18 | 肇庆高新区伙伴汽车技术有限公司 | Method for improving cost performance of new energy automobile and automatic transmission automobile |
| CN111981122B (en) * | 2020-08-09 | 2022-05-10 | 肇庆高新区伙伴汽车技术有限公司 | Automatic transmission automobile without clutch gearbox |
| CN111998068B (en) * | 2020-08-09 | 2022-05-10 | 肇庆高新区伙伴汽车技术有限公司 | Sliding vane type hydraulic driver |
| CN113580912A (en) * | 2021-09-07 | 2021-11-02 | 浙江大学 | Series-type electro-hydraulic hybrid power system |
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