CN103628519B - Excavator gyration braking energy recovery system - Google Patents
Excavator gyration braking energy recovery system Download PDFInfo
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- CN103628519B CN103628519B CN201310535753.8A CN201310535753A CN103628519B CN 103628519 B CN103628519 B CN 103628519B CN 201310535753 A CN201310535753 A CN 201310535753A CN 103628519 B CN103628519 B CN 103628519B
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- 238000011084 recovery Methods 0.000 title abstract description 6
- 239000012530 fluid Substances 0.000 claims description 147
- 238000006073 displacement reaction Methods 0.000 claims description 26
- 239000002828 fuel tank Substances 0.000 claims description 24
- 239000000523 sample Substances 0.000 claims description 10
- 206010008469 Chest discomfort Diseases 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 25
- 239000010720 hydraulic oil Substances 0.000 abstract description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000001172 regenerating effect Effects 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
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Abstract
The invention discloses an excavator rotation braking energy recovery system, which comprises: the system comprises an engine, a variable pump, a transfer case, an electromagnetic reversing valve, a hydraulic control one-way valve, a hydraulic control reversing valve, an energy accumulator, a rotary motor, a variable motor and a controller. The mechanical energy during the rotation braking of the excavator is the kinetic energy before the braking of the excavator. The system can recover energy when the rotary motor brakes, the pressure increasing valve increases pressure oil and stores the pressure oil in the energy accumulator in a hydraulic energy mode, and when the energy is released, hydraulic oil in the energy accumulator drives the variable motor and the motor to drive the main pump to work on a working load after power distribution of the transfer case. The invention adopts the hydraulic regulator consisting of the booster valve, the energy accumulator, the hydraulic control one-way valve and the variable motor, reduces the conversion link during energy recovery, improves the energy recovery efficiency, enables the engine to work in a high-efficiency area all the time, and reduces the oil consumption.
Description
Technical field
The present invention relates to excavator field of energy-saving technology, particularly relate to a kind of digger revolving brake energy recovering system.
Background technology
Excavator is as the important engineering machinery of one of earthwork construction, the earth volume that carry the world 65% ~ 70% is excavated, have the advantages that function is strong, market share amount is large, but its oil consumption is high, the drawback of discharge difference is further obvious under increasingly strict Abgasgesetz and high fuel price background, and the research of its power-saving technology becomes international research focus.The gross efficiency of excavator system is only about 20%, and energy loss mainly comprises: motor loss, restriction loss, Hydraulic Elements loss, mechanical device loss.At present, for above problem, the domestic research having carried out some excavator power-saving technologies, proposes the patent achievement that many energy regenerating utilize.
In these energy-saving schemes, great majority are that energy when utilizing accumulator to brake excavator reclaims, and because the hydraulic energy pressure reclaimed is lower, lower than system pressure, causes recovering energy and cannot discharge.Also scholar's energy regenerating proposed when being braked by excavator is had to be converted into electrical power storage in battery, together with motor, main pump is done work when work, and the dynamic response of battery is slow, during discharge and recharge, specific power is low, and be mechanical energy by hydraulic energy transfer, then during to electric energy, power conversion link is more, loss also just increases thereupon, therefore energy-storing efficiency is very low.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is for the deficiencies in the prior art, provides a kind of digger revolving brake energy recovering system.
In order to solve the problems of the technologies described above, the invention discloses a kind of digger revolving brake energy recovering system, comprising hydraulic circuit and control loop;
Hydraulic circuit comprises motor, main pump, transfer case, main reversing valve, the first pilot operated directional control valve, the second pilot operated directional control valve, the first solenoid operated directional valve, the second solenoid operated directional valve, the 3rd hydraulic control one-way valve, the 4th hydraulic control one-way valve, rotary motor, accumulator, variable displacement motor and the first fuel tank;
Described control loop comprises: pilot operated handle, pressure charging valve, PLC, pressure gauge and speed probe;
The power transmission shaft of motor is connected with the first power shaft I of transfer case, and the second power shaft II of transfer case is connected with the output shaft of variable displacement motor, and the output shaft of transfer case is connected with the power shaft of main pump; The input port of main pump connects the first fuel tank, and delivery outlet connects main reversing valve; Main reversing valve has four hydraulic fluid ports, and the first solenoid operated directional valve and the second solenoid operated directional valve have three hydraulic fluid ports; First hydraulic fluid port of main reversing valve is connected with main pump delivery outlet, main reversing valve the 4th hydraulic fluid port is connected to the first fuel tank, second hydraulic fluid port of main reversing valve is connected with the second hydraulic fluid port of the first solenoid operated directional valve, and the 3rd hydraulic fluid port of main reversing valve is connected with the first hydraulic fluid port of the second solenoid operated directional valve; 3rd hydraulic fluid port of the first solenoid operated directional valve is connected with the A mouth of rotary motor, and the B mouth of rotary motor is connected to the 3rd hydraulic fluid port of the second solenoid operated directional valve; First hydraulic fluid port of the first solenoid operated directional valve connects the 3rd hydraulic control one-way valve, second hydraulic fluid port of the second solenoid operated directional valve connects the 4th hydraulic control one-way valve, the first hydraulic fluid port of pressure charging valve is connected after 3rd hydraulic control one-way valve is connected with the 4th hydraulic control one-way valve, second hydraulic fluid port of pressure charging valve connects accumulator and the 5th hydraulic control one-way valve respectively, the entrance of the outlet link variable motor of the 5th hydraulic control one-way valve, 5th hydraulic control one-way valve is controlled by pressure charging valve signal end, control signal is sent by the commutation signal of pressure charging valve, the 5th hydraulic control one-way valve work when pressure charging valve cuts out;
Guide's hydraulic fluid port of described first pilot operated directional control valve, the hydraulic control mouth of the 4th hydraulic control one-way valve are connected with the 3rd hydraulic fluid port of main reversing valve, and guide's hydraulic fluid port, the hydraulic control mouth of the 3rd hydraulic control one-way valve of the second pilot operated directional control valve are connected with the second hydraulic fluid port of main reversing valve; When the second hydraulic fluid port of main reversing valve does not have pressure oil to export, the second pilot operated directional control valve is closed, and the 3rd hydraulic control one-way valve is opened; When the 3rd hydraulic fluid port of main reversing valve does not have pressure oil to export, the first pilot operated directional control valve is closed, and the 4th hydraulic control one-way valve is opened;
The control signal of pilot operated handle is outputted to the left-right signal end of main reversing valve respectively by X, Y port, pressure gauge is arranged on the hydraulic fluid port of accumulator, speed probe is arranged on the output shaft of variable displacement motor, controller receives the mode of operation signal of X, Y end simultaneously, the tach signal of manometric pressure signal and speed probe, and export control signal by controller to main pump, motor, pressure charging valve, variable displacement motor.
In the present invention, comprise choke valve, the first hydraulic control one-way valve, the second hydraulic control one-way valve and the second fuel tank; First fluid-control one-way valve outlet port connects the A mouth of rotary motor, second fluid-control one-way valve outlet port connects the B mouth of rotary motor, the first hydraulic fluid port of choke valve is connected to after first fluid-control one-way valve inlet and the second hydraulic control one-way valve inlet in series, second hydraulic fluid port of choke valve is connected with the second fuel tank, the signal input of choke valve is connected with PLC, is connected to the signal output of choke valve after the hydraulic control mouth of the first hydraulic control one-way valve and the hydraulic control mouth parallel connection of the second hydraulic control one-way valve;
Choke valve is controlled by controller, and when rotary motor is braked, the high pressure chest of rotary motor obtains pressure oil by the first hydraulic control one-way valve or the second hydraulic control one-way valve in choke valve second fuel tank.
In the present invention, when handle goes to X end, the left position work of main reversing valve, the first hydraulic fluid port of main reversing valve is communicated with the second hydraulic fluid port, and the 3rd hydraulic fluid port of main reversing valve is communicated with the 4th hydraulic fluid port; When handle goes to Y end, the right position work of main reversing valve, the first hydraulic fluid port of main reversing valve is communicated with the 3rd hydraulic fluid port, and the second hydraulic fluid port of main reversing valve is communicated with the 4th hydraulic fluid port.
In the present invention, bypass between main reversing valve second hydraulic fluid port and the second hydraulic fluid port of the first solenoid operated directional valve is connected with the first one way valve, the first pilot operated directional control valve, and the bypass between main reversing valve the 3rd hydraulic fluid port and the first hydraulic fluid port of the second solenoid operated directional valve is connected with the second one way valve, the second pilot operated directional control valve.
In the present invention, the bypass between main reversing valve second hydraulic fluid port and the second hydraulic fluid port of the first solenoid operated directional valve is connected with the first overflow valve, and the bypass between main reversing valve the 3rd hydraulic fluid port and the first hydraulic fluid port of the second solenoid operated directional valve is connected with the second overflow valve.
In the present invention, main reversing valve is three-position four-way electromagnetic directional valve, has four hydraulic fluid ports; First pilot operated directional control valve and the second pilot operated directional control valve are bi-bit bi-pass reversal valve, have two hydraulic fluid ports; First solenoid operated directional valve and the second solenoid operated directional valve are two position three way directional control valve, have three hydraulic fluid ports; Choke valve and pressure charging valve are bi-bit bi-pass solenoid operated directional valve, have two hydraulic fluid ports.
In the present invention, pressure charging valve, the 5th hydraulic control one-way valve, accumulator, variable displacement motor form fluid pressure governor.Pressure charging valve first hydraulic fluid port receives the pressure oil from rotary motor, be stored in accumulator, when pressure charging valve cuts out, the 5th hydraulic control one-way valve is opened, and the hydraulic oil in accumulator drives variable displacement motor and motor to drive main pump to do work to workload after the power of transfer case distributes.And the hydraulic oil flowing through variable displacement motor can enter other executing agencies, achieves the regeneration of flow.
In the present invention, the control signal of main reversing valve is controlled by pilot operated handle, when handle goes to X end, and the left position work of main reversing valve, the first hydraulic fluid port is communicated with the second hydraulic fluid port, and the 3rd hydraulic fluid port is communicated with the 4th hydraulic fluid port; When handle goes to Y end, the right position work of main reversing valve, the first hydraulic fluid port is communicated with the 3rd hydraulic fluid port, and the second hydraulic fluid port is communicated with the 4th hydraulic fluid port.
The present invention compared with prior art, has following beneficial effect:
(1) system employs the fluid pressure governor be made up of pressure charging valve, the 5th hydraulic control one-way valve, accumulator and variable displacement motor, can be used for receiving the pressure oil of rotary motor, and by the supercharging of pressure charging valve and the energy storage of accumulator, achieve self conversion of hydraulic energy, namely low pressure is to high pressure, overcome and changed to the complexity of hydraulic energy again to mechanical energy, electric energy by hydraulic energy, decrease power conversion link.
(2) in the energy regenerating stage, when oil liquid pressure is lower, pressure oil enters accumulator by pressure charging valve supercharging, and when oil liquid pressure is higher, pressure oil directly enters accumulator by pressure charging valve, substantially increases energy recovery efficiency.
(3) in the fault offset stage, pressure charging valve cuts out, 5th hydraulic control one-way valve is opened, pressure oil in accumulator drives variable displacement motor and motor to drive main pump work after the power of transfer case distributes, the energy of recovery is made to obtain abundant release, engine stabilizer is operated in fuel efficient district, reduces oil consumption.
Accompanying drawing explanation
To do the present invention below in conjunction with the drawings and specific embodiments and further illustrate, above-mentioned and/or otherwise advantage of the present invention will become apparent.
Fig. 1 is the structural representation of energy-recuperation system of the present invention.
Detailed description of the invention
Embodiment
Reference numeral in the present embodiment Fig. 1 is corresponding as follows: the first fuel tank 1, main pump 2, motor 3, main reversing valve 4, first pilot operated directional control valve 5, second pilot operated directional control valve 6, first one way valve 7, second one way valve 8, first overflow valve 9, second overflow valve 10, first solenoid operated directional valve 11, second solenoid operated directional valve 12, rotary motor 13, first hydraulic control one-way valve 14, second hydraulic control one-way valve 15, choke valve 16, pilot operated handle 17, 3rd hydraulic control one-way valve 18, 4th hydraulic control one-way valve 19, controller 20, transfer case 21, pressure charging valve 22, accumulator 23, 5th hydraulic control one-way valve 24, pressure gauge 25, variable displacement motor 26, speed probe 27, second fuel tank 28.
As shown in Figure 1, the present embodiment digger revolving brake energy recovering system comprise the first fuel tank 1, main pump 2, motor 3, main reversing valve 4, first pilot operated directional control valve 5, second pilot operated directional control valve 6, first one way valve 7, second one way valve 8, first overflow valve 9, second overflow valve 10, first solenoid operated directional valve 11, second solenoid operated directional valve 12, rotary motor 13, first hydraulic control one-way valve 14, second hydraulic control one-way valve 15, choke valve 16, pilot operated handle 17, 3rd hydraulic control one-way valve 18, 4th hydraulic control one-way valve 19, controller 20, transfer case 21, pressure charging valve 22, accumulator 23, 5th hydraulic control one-way valve 24, pressure gauge 25, variable displacement motor 26, speed probe 27, second fuel tank 28, the power transmission shaft of motor 3 is connected with the first power shaft I of transfer case 21, second power shaft II of transfer case 21 is connected with the output shaft of variable displacement motor 26, the output shaft of transfer case 21 is connected with the power shaft of main pump 2, main reversing valve 4 has four hydraulic fluid ports, main pump 2 delivery outlet is connected with the first hydraulic fluid port 4P of main reversing valve 4, 4th hydraulic fluid port 4T of main reversing valve 4 is connected to the first fuel tank 1, first solenoid operated directional valve 11 and the second solenoid operated directional valve 12 have three hydraulic fluid ports, second hydraulic fluid port 4A of main reversing valve 4 is connected with the second hydraulic fluid port 11B of the first solenoid operated directional valve 11, 3rd hydraulic fluid port 11C of the first solenoid operated directional valve 11 is connected with the A mouth of rotary motor 13, the B mouth of rotary motor 13 is connected to the 3rd hydraulic fluid port 12C of the second solenoid operated directional valve 12, first hydraulic fluid port 12A of the second solenoid operated directional valve 12 is connected with the 3rd hydraulic fluid port 4B of main reversing valve 4.
Bypass between described main reversing valve 4 the 3rd hydraulic fluid port 4B and the second solenoid operated directional valve 12 first hydraulic fluid port 12A is connected with the second one way valve 8, second pilot operated directional control valve 6, second overflow valve 10.Second hydraulic fluid port 12B of the second solenoid operated directional valve 12 is connected with the entrance of the 3rd hydraulic control one-way valve 18, and the outlet of the 3rd hydraulic control one-way valve 18 is connected to the first hydraulic fluid port 22A of pressure charging valve 22.
Bypass between described main reversing valve 4 second hydraulic fluid port 4A and the second hydraulic fluid port 11B of the first solenoid operated directional valve 11 is connected with the first one way valve 7, first pilot operated directional control valve 5, first overflow valve 9.First hydraulic fluid port 11A of the first solenoid operated directional valve 11 is connected with the entrance of the 4th hydraulic control one-way valve 19, and the outlet of the 4th hydraulic control one-way valve 19 is connected to the first hydraulic fluid port 22A of pressure charging valve 22.
Guide's hydraulic fluid port of described first pilot operated directional control valve 5, the hydraulic control mouth of the 4th pilot operated directional control valve 19 are connected with the 3rd hydraulic fluid port 4B of main reversing valve 4, and guide's hydraulic fluid port of the second pilot operated directional control valve 6, the hydraulic control mouth of the 3rd hydraulic control one-way valve 18 are connected with the second hydraulic fluid port 4A of main reversing valve 4.When the second hydraulic fluid port 4A of main reversing valve 4 does not have pressure oil to export, the second pilot operated directional control valve 6 is closed, and the 3rd hydraulic control one-way valve 18 is opened; When the 3rd hydraulic fluid port 4B of main reversing valve 4 does not have pressure oil to export, the first pilot operated directional control valve 5 is closed, and the 4th hydraulic control one-way valve 19 is opened.
The control signal of pilot operated handle 17 is outputted to the left-right signal end of main reversing valve 4 respectively by X, Y port, controller 20 receives mode of operation signal, the pressure signal of pressure gauge 25 and the tach signal of speed probe 27 that X, Y hold simultaneously, and exports control signal by controller 20 to main pump 2, pressure charging valve 22, motor 3, choke valve 16 and variable displacement motor 26.
Main reversing valve 4 is three-position four-way electromagnetic directional valve, has four hydraulic fluid ports; First pilot operated directional control valve 5 and the second pilot operated directional control valve 6 are bi-bit bi-pass reversal valve, have two hydraulic fluid ports; First solenoid operated directional valve 11 and the second solenoid operated directional valve 12 are two position three way directional control valve, have three hydraulic fluid ports; Pressure charging valve 22 and choke valve 16 are bi-bit bi-pass solenoid operated directional valve, have two hydraulic fluid ports.
Pressure charging valve 22, the 5th hydraulic control one-way valve 24, accumulator 23 and variable displacement motor 26 form fluid pressure governor.Pressure charging valve 22 first hydraulic fluid port 22A receives the pressure oil from rotary motor 13, be stored in accumulator 23, when pressure charging valve 22 cuts out, 5th hydraulic control one-way valve 24 is opened, and the hydraulic oil in accumulator 23 drives variable displacement motor 26 and motor 3 after the power of transfer case distributes, drive main pump 2 pairs of workload actings.And the hydraulic oil flowing through variable displacement motor 26 can enter other executing agencies, achieves the regeneration of flow.
5th hydraulic control one-way valve 24 is controlled by pressure charging valve 22 signal end, and control signal is sent by the commutation signal of pressure charging valve 22, and when pressure charging valve 22 cuts out, the 5th hydraulic control one-way valve 24 works.
Choke valve 16 is controlled by the signal of telecommunication, and controller 20 sends signal makes choke valve 16 work, and when rotary motor 13 is braked, high pressure chest obtains pressure oil by the first hydraulic control one-way valve 14 or the second hydraulic control one-way valve 15 from the second fuel tank 28.
The control signal of main reversing valve 4 is controlled by pilot operated handle 17, when handle goes to X end, and the left position work of main reversing valve 4, the first hydraulic fluid port 4P is communicated with the second hydraulic fluid port 4A, and the 3rd hydraulic fluid port 4B is communicated with the 4th hydraulic fluid port 4T; When handle goes to Y end, the right position work of main reversing valve 4, the first hydraulic fluid port 4P is communicated with the 3rd hydraulic fluid port 4B, and the second hydraulic fluid port 4A is communicated with the 4th hydraulic fluid port 4T.
As shown in Figure 1, when pilot operated handle 17 is placed in left end X, start working in the left position of main reversing valve 4, first hydraulic fluid port 4P is connected with the second hydraulic fluid port 4A, 3rd hydraulic fluid port 4B is connected with the 4th hydraulic fluid port 4T, second solenoid operated directional valve 12 right position work, 3rd hydraulic fluid port 12C is connected with the second hydraulic fluid port 12B, hydraulic oil from the first fuel tank 1 through main pump 2, first solenoid operated directional valve 11, enter the A chamber of rotary motor 13, the B chamber hydraulic oil of rotary motor 13 flows through the second pilot operated directional control valve 6 through the second hydraulic fluid port 12B of the second solenoid operated directional valve 12, the first fuel tank 1 got back to by second one way valve 8, rotary motor 13 rotates.
When guide's operating grip 17 is placed in right-hand member Y, start working in the right position of main reversing valve 4, first hydraulic fluid port 4P is connected with the 3rd hydraulic fluid port 4B, second hydraulic fluid port 4A is connected with the 4th hydraulic fluid port 4T, first solenoid operated directional valve 11 left position work, 3rd hydraulic fluid port 11C is connected with the first hydraulic fluid port 11A, hydraulic oil from the first fuel tank 1 through main pump 2, second solenoid operated directional valve 12, the B chamber entering rotary motor 13, the A chamber hydraulic oil of rotary motor 13 flows through the first pilot operated directional control valve 5, first one way valve 7 through the first hydraulic fluid port 11A of the first solenoid operated directional valve 11 and gets back to the first fuel tank 1, and rotary motor 13 rotates.
When rotary motor 13 rotates, hydraulic oil flows to B chamber from A chamber, when revolving dial needs to brake, controller 20 sends signal to main pump 2 and choke valve 16, main pump 2 quits work, choke valve 16 left position work, hydraulic fluid port 16A with 16B is communicated with, now the second pilot operated directional control valve 6 is closed, 3rd hydraulic control one-way valve 18 is opened, first hydraulic control one-way valve 14 works, second hydraulic control one-way valve 15 does not work, rotary motor 13 is rotated further under effect of inertia, A cavity pressure raises, pressure oil from the second fuel tank 29 through choke valve 16, first hydraulic control one-way valve 14 enters the A chamber of rotary motor 13, the pressure oil in B chamber is through the second solenoid operated directional valve 12, 3rd hydraulic control one-way valve 18, pressure charging valve 22 enters accumulator 23, accumulator 23 is in energy storage state, when pressure gauge 25 detects that pressure signal diminishes, controller 20 sends signal to pressure charging valve 22, pressure charging valve 22 cuts out, 5th hydraulic control one-way valve 24 is opened, energy regenerating is complete.
When rotary motor 13 rotates, hydraulic oil flows to A chamber from B chamber, when revolving dial needs to brake, controller 20 sends signal to main pump 2 and choke valve 16, main pump 2 quits work, choke valve 16 left position work, hydraulic fluid port 16A with 16B is communicated with, now the first pilot operated directional control valve 5 is closed, 4th hydraulic control one-way valve 19 is opened, second hydraulic control one-way valve 15 works, first hydraulic control one-way valve 14 does not work, rotary motor 13 is rotated further under effect of inertia, B cavity pressure raises, pressure oil from the second fuel tank 29 through choke valve 16, second hydraulic control one-way valve 15 enters the B chamber of rotary motor 13, the pressure oil in A chamber is through the first solenoid operated directional valve 11, 4th hydraulic control one-way valve 19, pressure charging valve 22 enters accumulator 23, accumulator 23 is in energy storage state, when pressure gauge 25 detects that pressure signal diminishes, controller 20 sends signal to pressure charging valve 22, pressure charging valve 22 cuts out, 5th hydraulic control one-way valve 24 is opened, energy regenerating is complete.
When rotary motor 13 is rotated further, controller 20 sends signal to variable displacement motor 26, motor 3, main pump 2, pressure oil in accumulator 23 drives variable displacement motor 26 and motor 3 to distribute rear drive main pump 2 through the power of transfer case through the 5th hydraulic control one-way valve 24 and works, when speed probe 27 detects that the output speed of variable displacement motor 26 declines, controller sends signal to variable displacement motor 26, motor 3, main pump 2, variable displacement motor 26 quits work, now drive main pump 2 to rotate by motor 3, continue to drive rotary motor 13 to rotate.In energy release process, the Conversion of Energy of accumulator 23 is mechanical energy by variable displacement motor 26, combines output with motor, makes up because the motor 3 that load change causes greatly exports deficiency, stablize motor 3 and be operated in fuel efficient district, improve fuel economy, save excavator oil consumption.
The invention provides a kind of digger revolving brake energy recovering system; the method and access of this technical scheme of specific implementation is a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each ingredient not clear and definite in the present embodiment is realized.
Claims (5)
1. a digger revolving brake energy recovering system, is characterized in that, comprises hydraulic circuit and control loop;
Hydraulic circuit comprises motor, main pump, transfer case, main reversing valve, the first pilot operated directional control valve, the second pilot operated directional control valve, the first solenoid operated directional valve, the second solenoid operated directional valve, the 3rd hydraulic control one-way valve, the 4th hydraulic control one-way valve, rotary motor, accumulator, variable displacement motor and the first fuel tank;
Described control loop comprises: pilot operated handle, pressure charging valve, PLC, pressure gauge and speed probe;
The power transmission shaft of motor is connected with the first power shaft I of transfer case, and the second power shaft II of transfer case is connected with the output shaft of variable displacement motor, and the output shaft of transfer case is connected with the power shaft of main pump; The input port of main pump connects the first fuel tank, and delivery outlet connects main reversing valve; Main reversing valve has four hydraulic fluid ports, and the first solenoid operated directional valve and the second solenoid operated directional valve have three hydraulic fluid ports; First hydraulic fluid port of main reversing valve is connected with main pump delivery outlet, main reversing valve the 4th hydraulic fluid port is connected to the first fuel tank, second hydraulic fluid port of main reversing valve is connected with the second hydraulic fluid port of the first solenoid operated directional valve, and the 3rd hydraulic fluid port of main reversing valve is connected with the first hydraulic fluid port of the second solenoid operated directional valve; 3rd hydraulic fluid port of the first solenoid operated directional valve is connected with the A mouth of rotary motor, and the B mouth of rotary motor is connected to the 3rd hydraulic fluid port of the second solenoid operated directional valve; First hydraulic fluid port of the first solenoid operated directional valve connects the 4th hydraulic control one-way valve, second hydraulic fluid port of the second solenoid operated directional valve connects the 3rd hydraulic control one-way valve, the first hydraulic fluid port of pressure charging valve is connected after 3rd hydraulic control one-way valve is connected with the 4th hydraulic control one-way valve, second hydraulic fluid port of pressure charging valve connects accumulator and the 5th hydraulic control one-way valve respectively, the entrance of the outlet link variable motor of the 5th hydraulic control one-way valve, 5th hydraulic control one-way valve is controlled by pressure charging valve signal end, control signal is sent by the commutation signal of pressure charging valve, the 5th hydraulic control one-way valve work when pressure charging valve cuts out;
Guide's hydraulic fluid port of described first pilot operated directional control valve, the hydraulic control mouth of the 4th hydraulic control one-way valve are connected with the 3rd hydraulic fluid port of main reversing valve, and guide's hydraulic fluid port, the hydraulic control mouth of the 3rd hydraulic control one-way valve of the second pilot operated directional control valve are connected with the second hydraulic fluid port of main reversing valve; When the second hydraulic fluid port of main reversing valve does not have pressure oil to export, the second pilot operated directional control valve is closed, and the 3rd hydraulic control one-way valve is opened; When the 3rd hydraulic fluid port of main reversing valve does not have pressure oil to export, the first pilot operated directional control valve is closed, and the 4th hydraulic control one-way valve is opened;
The control signal of pilot operated handle is outputted to the left-right signal end of main reversing valve respectively by X, Y port, pressure gauge is arranged on the hydraulic fluid port of accumulator, speed probe is arranged on the output shaft of variable displacement motor, controller receives the mode of operation signal of X, Y end simultaneously, the tach signal of manometric pressure signal and speed probe, and export control signal by controller to main pump, motor, pressure charging valve, variable displacement motor.
2. a kind of digger revolving brake energy recovering system according to claim 1, is characterized in that, comprises choke valve, the first hydraulic control one-way valve, the second hydraulic control one-way valve and the second fuel tank; First fluid-control one-way valve outlet port connects the A mouth of rotary motor, second fluid-control one-way valve outlet port connects the B mouth of rotary motor, the first hydraulic fluid port of choke valve is connected to after first fluid-control one-way valve inlet and the second hydraulic control one-way valve inlet in series, second hydraulic fluid port of choke valve is connected with the second fuel tank, the signal input of choke valve is connected with PLC, is connected to the signal output of choke valve after the hydraulic control mouth of the first hydraulic control one-way valve and the hydraulic control mouth parallel connection of the second hydraulic control one-way valve;
Choke valve is controlled by controller, and when rotary motor is braked, the high pressure chest of rotary motor obtains pressure oil through choke valve by the first hydraulic control one-way valve or the second hydraulic control one-way valve from the second fuel tank.
3. a kind of digger revolving brake energy recovering system according to claim 1, it is characterized in that, when handle goes to X end, the left position work of main reversing valve, first hydraulic fluid port of main reversing valve is communicated with the second hydraulic fluid port, and the 3rd hydraulic fluid port of main reversing valve is communicated with the 4th hydraulic fluid port; When handle goes to Y end, the right position work of main reversing valve, the first hydraulic fluid port of main reversing valve is communicated with the 3rd hydraulic fluid port, and the second hydraulic fluid port of main reversing valve is communicated with the 4th hydraulic fluid port.
4. a kind of digger revolving brake energy recovering system according to claim 1, it is characterized in that, bypass between main reversing valve second hydraulic fluid port and the second hydraulic fluid port of the first solenoid operated directional valve is connected with the first one way valve, the first pilot operated directional control valve, and the bypass between main reversing valve the 3rd hydraulic fluid port and the first hydraulic fluid port of the second solenoid operated directional valve is connected with the second one way valve, the second pilot operated directional control valve.
5. a kind of digger revolving brake energy recovering system according to claim 1, it is characterized in that, bypass between main reversing valve second hydraulic fluid port and the second hydraulic fluid port of the first solenoid operated directional valve is connected with the first overflow valve, and the bypass between main reversing valve the 3rd hydraulic fluid port and the first hydraulic fluid port of the second solenoid operated directional valve is connected with the second overflow valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310535753.8A CN103628519B (en) | 2013-11-01 | 2013-11-01 | Excavator gyration braking energy recovery system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310535753.8A CN103628519B (en) | 2013-11-01 | 2013-11-01 | Excavator gyration braking energy recovery system |
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| CN103628519A CN103628519A (en) | 2014-03-12 |
| CN103628519B true CN103628519B (en) | 2015-10-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103993624B (en) * | 2014-06-06 | 2016-02-24 | 山东中川液压有限公司 | A kind of hydraulic crawler excavator accumulator Energy release control device |
| CN104196079A (en) * | 2014-07-25 | 2014-12-10 | 昆山三一数字科技有限公司 | Hydraulic excavator hybrid power system and hydraulic excavator thereof |
| CN104358749B (en) * | 2014-09-30 | 2017-01-18 | 徐州徐工挖掘机械有限公司 | Energy recovery and utilization system for movable arm potential energy |
| CN104563193B (en) * | 2014-12-26 | 2017-07-28 | 潍柴动力股份有限公司 | A kind of excavator and its hydraulic power system |
| KR102582826B1 (en) * | 2016-09-12 | 2023-09-26 | 에이치디현대인프라코어 주식회사 | Contorl system for construction machinery and control method for construction machinery |
| JP6676824B2 (en) * | 2017-09-29 | 2020-04-08 | 株式会社日立建機ティエラ | Hydraulic drive for work machines |
| CN108708422A (en) * | 2018-05-30 | 2018-10-26 | 马鞍山松鹤信息科技有限公司 | A kind of energy saving excavator |
| CN110499794B (en) * | 2019-08-30 | 2021-03-12 | 中国矿业大学 | Heavy-load movable arm potential energy recycling system of large hydraulic excavator and control method thereof |
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| JP3625149B2 (en) * | 1999-03-31 | 2005-03-02 | コベルコ建機株式会社 | Hydraulic control circuit for construction machinery |
| CN102587444A (en) * | 2012-03-07 | 2012-07-18 | 浙江大学 | Oil hybrid system for excavator with energy differential recovery |
| CN202745096U (en) * | 2012-09-11 | 2013-02-20 | 华南理工大学 | Hybrid power system capable of recycling potential energy of movable arm of excavator |
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|---|---|---|---|---|
| JP5758137B2 (en) * | 2011-01-31 | 2015-08-05 | 株式会社Kcm | Industrial vehicle hydraulic pump control system and industrial vehicle |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3625149B2 (en) * | 1999-03-31 | 2005-03-02 | コベルコ建機株式会社 | Hydraulic control circuit for construction machinery |
| CN102587444A (en) * | 2012-03-07 | 2012-07-18 | 浙江大学 | Oil hybrid system for excavator with energy differential recovery |
| CN202745096U (en) * | 2012-09-11 | 2013-02-20 | 华南理工大学 | Hybrid power system capable of recycling potential energy of movable arm of excavator |
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