CN101403405A - Energy recovery system of hybrid single-pump multi-execution component engineering machinery - Google Patents
Energy recovery system of hybrid single-pump multi-execution component engineering machinery Download PDFInfo
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- CN101403405A CN101403405A CNA2008101220747A CN200810122074A CN101403405A CN 101403405 A CN101403405 A CN 101403405A CN A2008101220747 A CNA2008101220747 A CN A2008101220747A CN 200810122074 A CN200810122074 A CN 200810122074A CN 101403405 A CN101403405 A CN 101403405A
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- 238000011084 recovery Methods 0.000 title abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims abstract description 68
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims description 15
- 230000011664 signaling Effects 0.000 claims description 10
- 239000002828 fuel tank Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 47
- 239000010720 hydraulic oil Substances 0.000 description 6
- 238000005381 potential energy Methods 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses an energy recovery system of a hybrid power single-pump multi-implementation-element engineering machine. The energy recovery system mainly comprises a planetary gear mechanism, a variable pump, an engine, a proportion direction valve, a variable motor, a fuel tank, a signal control unit, a rectifier/inverter, a variable frequency motor, a super-capacitor and the like. The signal control unit obtains a control signal from a control handle and a pressure sensor, sends out a control command to the engine, the variable pump, the proportion direction valve, an electromagnetic reversal valve, the rectifier/inverter, and the variable motor so as to control the position of the throttle position of the engine, the discharge capacity of the variable pump, the valve core displacement of the proportion direction valve, the work station of the electromagnetic reversal valve, the rotating speed of the variable frequency motor, and the discharge capacity of the variable motor, and therefore controls the action of the fuel tank. After the invention uses the planetary gear mechanism, a hybrid power system and the energy recovery system share one variable frequency motor, thereby reducing the installation space, and can recover the energy directly, thereby improving the recovery efficiency of the energy recovery system.
Description
Technical field
The present invention relates to the hydraulic control system that electrohydraulic control technology is a feature, especially relate to a kind of energy-recuperation system of hybrid single-pump multi-execution component engineering machinery.
Background technique
Along with being on the rise of energy shortage in the world wide and environmental pollution problem, the power saving of research engineering machinery has important practical significance.Because the lifting and transfer weight repeatedly of the power cylinder in many actuators engineering machinery, and each mechanical arm inertia of engineering machinery is bigger, when mechanical arm descends or brakes, can discharge a large amount of potential energy or kinetic energy, in traditional engineering machinery, this part energy is difficult to reclaim, stores and utilizes, has not only caused the waste of the energy, also can cause harm such as heating, noise, vibration and reduction life-span.If can and utilize again this part energy recovery, can improve the capacity usage ratio of engineering machinery, thereby reduce its energy consumption.
Introduce mixed power system in engineering machinery, owing to possess energy storage devices such as battery or electric capacity in the power system, the recovery of energy and storage all are easy to realize.At present, the energy recovery scheme based on hybrid power engineering machinery is: the oil back chamber of oil hydraulic cylinder and reclaims oil hydraulic motor and links to each other, and this oil hydraulic motor links with dynamoelectric machine M1 is coaxial.The hydraulic oil of hydraulic actuator oil back chamber drives the oil hydraulic motor revolution, and hydraulic pressure can be converted into mechanical energy output, and drives dynamoelectric machine M1 generating, and the three phase current electric energy is direct current energy and is stored in the middle of the energy-storage travelling wave tube electric capacity through rectification/inverter rectification.When system needed, direct current energy drove dynamoelectric machine M2 by the three phase current electric energy that rectifier is reverse into target frequency, drove load (oil hydraulic pump) work jointly with motor.Electric capacity in the system both had been the energy-storage travelling wave tube of oil hydraulic motor recovered energy, also was the DC electrical source of motor M in the hybrid electric drive system simultaneously.This energy-recuperation system has two dynamoelectric machines, complex structure, bulky, all loads simultaneously descend the potential energy recycling that discharges all through the multiple energy conversion of the mechanical energy of the potential energy of associating-hydraulic pressure energy-mechanical energy-electric energy-battery-drivings variable displacement pump, flow of energy is very complicated in the system, has influenced the energy recovery efficiency of system.
Summary of the invention
In order to reduce the restriction loss of hydraulic control valve, gravitational potential energy when making full use of the weight whereabouts, the inertia energy, the energy recovery efficiency of raising system, the object of the present invention is to provide a kind of energy-recuperation system of hybrid single-pump multi-execution component engineering machinery, not only utilize the electric weight storage device of hybrid power engineering machinery, by oil hydraulic motor-dynamoelectric machine above-mentioned energy being changed into electric energy recycles, and can utilize oil hydraulic motor, planetary gears directly drives variable displacement pump to above-mentioned energy recovery, and effectively dynamoelectric machine in the dynamoelectric machine of mixed power system and the energy-recuperation system is coupled by planetary gears, make and make the system architecture compactness by the hybrid power system shared motor generator set of energy-recuperation system of unifying.
In order to achieve the above object, the technical solution used in the present invention is as follows:
The present invention includes: planetary gears, variable displacement pump, motor, proportion directional valve, variable displacement motor, two one-way valves, proportional pressure control valve, safety valve, oil cylinder, Joystick, pressure transducer, signaling control unit, solenoid directional control valve, rectification/inverter, variable-frequency motor and super capacitors.
Its interconnected relationship is as follows:
Motor, the coaxial back that links of variable displacement pump link to each other with the planet carrier of planetary gears; The sun gear of variable displacement motor and planetary gears links to each other; The gear ring of variable-frequency motor and planetary gears links to each other; The oil outlet of variable displacement pump divides two-way, and the first via connects the input end of pressure transducer, and the second the tunnel connects the filler opening of first one-way valve; The oil outlet of first one-way valve is divided into four the tunnel, and the first via connects the filler opening of proportional pressure control valve, and the second the tunnel connects P mouth, the P1 mouth of proportion directional valve, and Third Road connects the driving oil circuit mouth of other actuators, and the four the tunnel connects the filler opening of safety valve; The T mouth of proportion directional valve links to each other with the P mouth of solenoid directional control valve; The A mouth links to each other with the rodless cavity of oil cylinder, and the B mouth links to each other with the rod chamber of oil cylinder, C mouth connected tank; The B mouth connected tank of solenoid directional control valve, the A mouth divides two-way, and the filler opening of the first via and variable displacement motor links to each other, and the second the tunnel connects the oil outlet of second one-way valve, the filler opening connected tank of one-way valve; Signaling control unit obtains control signal from Joystick, obtain load signal from pressure transducer, send throttle position, variable pump delivery, the valve core displacement of proportion directional valve, the station of solenoid directional control valve, the rotating speed of variable-frequency motor and the discharge capacity of variable displacement motor of control command control motor to motor, variable displacement pump, proportion directional valve, solenoid directional control valve, rectification/inverter and variable displacement motor, thereby control the action of oil cylinder.
The present invention compares with background technique, has useful effect to be:
1, system utilizes planetary gears, gravitational potential energy, inertia energy and the Brake Energy of the hydraulic actuator that variable displacement motor reclaims can directly drive variable displacement pump by planetary gears, avoid the energy recovery process owing to the energy loss that the multiple conversions of energy causes, improved the reuse efficiency of energy-recuperation system.
2, system adopts planetary gears that variable displacement motor, motor, motor effectively are coupled, and the hybrid power system shared dynamoelectric machine of energy-recuperation system of unifying has reduced by a dynamoelectric machine, has reduced the installation space.
3, adopt this reclaiming system after, when power cylinder descends, adopted energy-recuperation system that kinetic energy or the potential energy that oil cylinder retraction or braking discharge is reclaimed.Simultaneously, owing to proportion directional valve standard-sized sheet this moment, the speed that system descends is controlled by the inlet flow rate of oil hydraulic motor, no longer the valve core displacement of passing ratio directional control valve is controlled, and has avoided the meter in loss because of proportion directional valve oil inlet and oil return mouth interlock generation in the hydraulic drive circuit.
Description of drawings
Accompanying drawing is a structural principle schematic representation of the present invention.
Among the figure: 1, planetary gears, 2, variable displacement pump, 3, motor, 4, pressure difference transducer, 5, one-way valve, 6, proportional pressure control valve, 7, proportion directional valve, 8, oil cylinder, 9, safety valve, 10, Joystick, 11, signaling control unit, 12, solenoid directional control valve, 13, one-way valve, 14, variable displacement motor, 15, rectification/inverter, 16, variable-frequency motor, 17, super capacitor, 18, the driving oil circuit of other actuators.
Embodiment
Below in conjunction with accompanying drawing, provide details of the present invention by description to embodiment.
As shown in drawings, the present invention includes planetary gears 1, variable displacement pump 2, motor 3, proportion directional valve 7, variable displacement motor 14, two one- way valves 5,13, proportional pressure control valve 6, safety valve 9, oil cylinder 8, Joystick 10, pressure transducer 4, signaling control unit 11, solenoid directional control valve 12, rectification/inverter 15, variable-frequency motor 16 and super capacitors 17; Its interconnected relationship is as follows: motor 3, the variable displacement pump 2 coaxial backs that link link to each other with the planet carrier of planetary gears 1; Variable displacement motor 14 links to each other with the sun gear of planetary gears 1; Variable-frequency motor 16 links to each other with the gear ring of planetary gears 1; The oil outlet of variable displacement pump 2 divides two-way, and the first via connects the input end of pressure transducer 4, and the second the tunnel connects the filler opening of first one-way valve 5; The oil outlet of first one-way valve 5 is divided into four the tunnel, and the first via connects the filler opening of proportional pressure control valve 6, and the second the tunnel connects P mouth, the P1 mouth of proportion directional valve 7, and the driving oil circuit mouth 18, the four tunnel that Third Road meets other actuators connects the filler opening of safety valve 9; The T mouth of proportion directional valve 7 links to each other with the P mouth of solenoid directional control valve 12; The A mouth links to each other with the rodless cavity of oil cylinder 8, and the B mouth links to each other with the rod chamber of oil cylinder 8, C mouth connected tank; The B mouth connected tank of solenoid directional control valve 12, the A mouth divides two-way, and the first via links to each other with the filler opening of variable displacement motor 14, and the second the tunnel connects the oil outlet of second one-way valve 13, the filler opening connected tank of one-way valve 13; Signaling control unit 11 obtains control signal from Joystick 10, obtain load signal from pressure transducer 4, send throttle position, the discharge capacity of variable displacement pump 2, the valve core displacement of proportion directional valve 7, the station of solenoid directional control valve 12, the rotating speed of variable-frequency motor 16 and the discharge capacity of variable displacement motor 14 of control command control motor 3 to motor 3, variable displacement pump 2, proportion directional valve 7, solenoid directional control valve 12, rectification/inverter 15 and variable displacement motor 14, thereby control the action of oil cylinder 8.
The working principle of system is as follows:
Joystick 10 sends control signal and gives signaling control unit 11, signaling control unit 11 carries out the A/D conversion to the output of pressure transducer 4 simultaneously, after treated, send control command to motor 3, variable-frequency motor 16, variable displacement motor 14 and variable displacement pump 2, the rotating speed of controlled variable pump 2 and discharge capacity, promptly controlled the flow of variable displacement pump 2, the rotating speed of controlled variable motor 14 and discharge capacity have promptly been controlled the flow of variable displacement motor 14; Send control signal to proportional pressure control valve 6, controlled variable pump 2 outlet pressures; Send control signal to proportion directional valve 7, the area of passage of two valve ports is promptly controlled in the displacement of control ratio directional control valve 7 valve cores; Simultaneously, send control system to solenoid directional control valve 12, the oil return of proportion directional valve 7 is to take back fuel tank by variable displacement motor 14, still direct oil sump tank; Control signal one timing at operating grip 10, the throttle shift control signal of motor is constant, the tach signal that is motor is constant, can estimate to drive the needed bearing power of load (variable displacement pump 2) by the induced pressure of pressure transducer 4 detections and the discharge capacity signal of variable displacement pump 2.
When control signal for just, specific as follows:
(1) proportion directional valve 7 right laterals, solenoid directional control valve 12 left lateral, variable displacement pump 2 hydraulic oil enter oil cylinder 8 rodless cavities by P mouth, the A mouth of one-way valve 5, proportion directional valve 7, promote oil cylinder 8 risings and lift weight; The hydraulic oil of oil cylinder 8 rod chambers is through the B of proportion directional valve 7 mouth and T mouth, the P mouth of solenoid directional control valve 12, B mouth oil sump tank.This moment, system controlled oil cylinder 8 rates of climb by regulating the 7 valve core displacements of proportion directional valve, was in the entrance throttle governing circuit state;
(2) mixed power system be made up of motor 3 and variable-frequency motor 16 of variable displacement pump 2 drives jointly, and variable displacement motor is in idling conditions.When bearing power during greater than the output power of motor 3, variable-frequency motor 16 is operated in motoring condition, and variable displacement pump 2 is driven jointly by motor 3 and variable-frequency motor 16, and super capacitor 17 is in discharge condition; When bearing power during less than the output power of motor 3, variable-frequency motor 16 is operated in generating state, motor 3 drives variable-frequency motor 16 when driving variable displacement pump 2 the unnecessary energy of motor output is changed into electrical power storage in super capacitor 17, and super capacitor 17 is in charged state.
When control signal for negative, concrete working principle is as follows:
(1) proportion directional valve 7 left lateral, solenoid directional control valve 12 right laterals, variable displacement pump 2 hydraulic oil enter oil cylinder 8 rod chambers through the P mouth and the B mouth of one-way valve 5, proportion directional valve 7, and the hydraulic oil of oil cylinder 8 rodless cavities is through the P mouth of the A of proportion directional valve 7 mouth and T mouth, solenoid directional control valve 12 and A mouth, variable displacement motor 14 oil sump tanks.At this moment, proportion directional valve 7 valve port standard-sized sheets, the speed that system's oil cylinder 8 descends is to control by the flow of Moderator Variable motor 14, is in the retraction volume speed regulating control;
(2) hydraulic oil of oil cylinder 8 rodless cavities drives variable displacement motor 14 rotations, the output speed of variable displacement motor 14 and torque can directly drive variable displacement pump 2 by planetary gears 1, also can drive variable-frequency motor 16 generatings by planetary gears 1, the transformation of energy during with oil cylinder 8 retractions or braking is to be stored in the energy storage apparatus super capacitor 17 of mixed power system behind the electric energy.
(3) when the power of the driving oil circuit mouth 18 of other actuators of system during greater than the regenerative power of variable displacement motor 14, variable displacement pump 2 is driven jointly by motor 3, variable displacement motor 14 and variable-frequency motor 16, wherein the regenerative power of variable displacement motor 14 all drives variable displacement pump 2 by planetary gears 1, and the mixed power system that not enough power is made up of motor 3 and variable-frequency motor 16 drives; When the power of the driving oil circuit mouth 18 of other actuators of system during less than the regenerative power of variable displacement motor 14, variable displacement motor 14 drives variable displacement pump 2 by planetary gears 1 the load power demand is provided, drive variable-frequency motor 16 feedbacks generating by planetary gears 1 simultaneously, motor 3 is in the auto idle speed state.
More than, the rectification/inverter 14 that the present invention relates to, super capacitor 17 can be chosen in market as required.Signaling control unit 11 can adopt the PLC programmable logic controller (PLC).
Claims (1)
1, a kind of energy-recuperation system of hybrid single-pump multi-execution component engineering machinery, it is characterized in that: comprise planetary gears (1), variable displacement pump (2), motor (3), proportion directional valve (7), variable displacement motor (14), two one-way valves (5,13), proportional pressure control valve (6), safety valve (9), oil cylinder (8), Joystick (10), pressure transducer (4), signaling control unit (11), solenoid directional control valve (12), rectification/inverter (15), variable-frequency motor (16) and super capacitor (17); Its interconnected relationship is as follows:
Motor (3), the coaxial back that links of variable displacement pump (2) link to each other with the planet carrier of planetary gears (1); Variable displacement motor (14) links to each other with the sun gear of planetary gears (1); Variable-frequency motor (16) links to each other with the gear ring of planetary gears (1); The oil outlet of variable displacement pump (2) divides two-way, and the first via connects the input end of pressure transducer (4), and the second the tunnel connects the filler opening of first one-way valve (5); The oil outlet of first one-way valve (5) is divided into four the tunnel, the first via connects the filler opening of proportional pressure control valve (6), and the second the tunnel connects P mouth, the P1 mouth of proportion directional valve (7), and Third Road connects the driving oil circuit mouth (18) of other actuators, the four the tunnel connects the filler opening of safety valve (9); The T mouth of proportion directional valve (7) links to each other with the P mouth of solenoid directional control valve (12); The A mouth links to each other with the rodless cavity of oil cylinder (8), and the B mouth links to each other with the rod chamber of oil cylinder (8), C mouth connected tank; The B mouth connected tank of solenoid directional control valve (12), the A mouth divides two-way, and the first via links to each other with the filler opening of variable displacement motor (14), and the second the tunnel connects the oil outlet of second one-way valve (13), the filler opening connected tank of one-way valve (13); Signaling control unit (11) obtains control signal from Joystick (10), obtain load signal from pressure transducer (4), send throttle position, the discharge capacity of variable displacement pump (2), the valve core displacement of proportion directional valve (7), the station of solenoid directional control valve (12), the rotating speed of variable-frequency motor (16) and the discharge capacity of variable displacement motor (14) of control command control motor (3) to motor (3), variable displacement pump (2), proportion directional valve (7), solenoid directional control valve (12), rectification/inverter (15) and variable displacement motor (14), thereby control the action of oil cylinder (8).
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| CN101791943A (en) * | 2010-04-02 | 2010-08-04 | 三一重机有限公司 | Hydro-electric mixed driving system used for engineering machinery |
| CN102182730A (en) * | 2011-05-05 | 2011-09-14 | 四川省成都普什机电技术研究有限公司 | Movable arm flow re-generation system with potential energy recovery device for excavator |
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- 2008-10-31 CN CNA2008101220747A patent/CN101403405A/en active Pending
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