CN201746870U - Hydraulic hybrid power device of excavator - Google Patents
Hydraulic hybrid power device of excavator Download PDFInfo
- Publication number
- CN201746870U CN201746870U CN201020232332XU CN201020232332U CN201746870U CN 201746870 U CN201746870 U CN 201746870U CN 201020232332X U CN201020232332X U CN 201020232332XU CN 201020232332 U CN201020232332 U CN 201020232332U CN 201746870 U CN201746870 U CN 201746870U
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- variable pump
- excavator
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- accumulator
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Abstract
The utility model discloses a hydraulic hybrid power device of an excavator. The hydraulic hybrid power device is connected with a hydraulic rotary motor. The hydraulic hybrid power device comprises a variable pump I and a variable pump II which are reversely connected, a one-way valve, reversing valves, an accumulator and shuttle valves, wherein the two ends of the shuttle valve are connected with an oil inlet and an oil outlet of the rotary motor, and the variable pump I and the variable pump II are respectively connected with the two shuttle valves through the reversing valves; and the accumulator is connected with one reversing valve, and the variable pump II is connected with the accumulator through the one-way valve. The utility model can effectively absorb the energy of the excavator when the excavator rotatably brakes and release the energy of the excavator when the excavator reversely rotates, thereby realizing the recycling of the energy, simultaneously protecting a hydraulic system and hydraulic components, preventing the hydraulic shock and overflow heating, and prolonging the service life of the hydraulic components and mechanical parts.
Description
Technical field
The utility model belongs to the hybrid power system of engineering machinery vehicle, is specifically related to a kind of excavator hydraulic hybrid device.
Background technology
The rotating energy consumption of monobucket hydraulic crawler excavator slew gear accounts for 25%～40%, and the calorific value of revolution hydraulic circuit accounts for 30%～40% of hydraulic system gross calorific power.Certainly lead to hydraulic shock and overflow heating during rotary braking; bring adverse effect for the application life of hydraulic pressure element and the heat balance of hydraulic system; as this part energy is recycled; system and element have promptly been protected; saved energy again, so everybody more and more pays close attention to the recycling of this part energy.
In the actual job of excavator, revolution is that work cycle must be used, and after excavating, filling bucket, carries swing arm and turns round simultaneously, be turned back to unloading position before, begin braking, the discharging of exhibition bucket.Reversed turning, the arm that falls are got back to the initialization state then, enter next working cycles again.When rotary braking, at first must operate the revolution pilot valve and get back to meta, the oil circuit of turnover rotary motor A, B mouth is cut off, yet this moment is because the inertia of top rotating part, motor still continues rotation, suppose to be the oil-feed of A mouth before, cause the B mouth pressure sharply to raise, cause hydraulic shock, when hydraulic pressure is elevated to the setting pressure of overload valve, open overload valve, overflow back hydraulic oil container, thereby cause spill losses.
Present medium-and-large-sized excavator power control system all is devoted to the Study on energy saving of hybrid power, on some medium-sized excavator, just actively apply electric mixed dynamic system, with energy conservation effectively, but the electric hybrid system must use components and parts such as generator motor, current transformer, capacitor, converter, electric rotating machine, could be effectively mechanical energy during with revolution be converted to electric energy and store, by discharging and recharging of capacitor, drive motor drives the rotary reducer motion, the recycling of energy during with the realization rotary braking.The electricity mixed power of this basic principle is adopted in the prior art field more.Its defective is: use multiple electric elements such as capacitor, space above the digger revolving platform is narrow and small, give to install and use and cause many difficulties, the back maintenance of breaking down is also inconvenient, and electric elements connect complicated, volume is big, cost an arm and a leg and the life-span short.
Summary of the invention
In order to overcome the above-mentioned defective that the prior art field exists, the purpose of this utility model is, a kind of excavator hydraulic hybrid device is provided, avoided hydraulic shock and overflow heating, and has improved the application life of Hydraulic Elements, machine components.
The excavator hydraulic hybrid device that the utility model provides, be connected with the hydraulic gyration motor of excavator, it comprises variable pump I, the variable pump II of opposing connection, and one way valve, reversal valve, accumulator, shuttle valve, the shuttle valve two ends connect the oil inlet and outlet of rotary motor, variable pump I, variable pump II are connected with two shuttle valves by reversal valve respectively, and accumulator is connected with a reversal valve, and variable pump II is connected with accumulator by one way valve.
The excavator hydraulic hybrid device that the utility model provides, hydraulic circuit is connected with the rotary motor oil circuit, during the forward braking, the energy that produces owing to inertia during with braking is converted to hydraulic pressure at last and can stores, and then when reverse rotation, again hydraulic pressure can be discharged in the oil circuit of rotary motor by the loop, drive the motor reverse rotation.Realize the recycling of energy.When forward turned round, the hydraulic oil that produces during rotary braking was through shuttle valve and hydraulic control one-way valve entering variable pump I, and this moment, variable pump I used as hydraulic motor, drove variable pump II rotation, to the accumulator pressurising, finished the pressurising process.II uses as hydraulic motor when reverse rotation variations per hour pump, drive variable pump I, pressure oil in the accumulator enters the oil-in of hydraulic motor through variable pump I, hydraulic control one-way valve and shuttle valve, mechanical energy when rotary fluid motor is braked like this is converted into the hydraulic pressure energy, pressurising and release by accumulator constantly are recycled.
The excavator hydraulic hybrid device that the utility model provides; its beneficial effect is; energy in the time of can effectively absorbing the digger revolving braking; and when the excavator reversed turning, discharge; thereby realize the recycling of energy; protect hydraulic system and element simultaneously, avoided hydraulic shock and overflow heating, and the application life of having improved Hydraulic Elements, machine components.This apparatus structure is succinct, control is simple, and use, operation, installation, maintenance are conveniently.
The present invention compares with existing electricity mixed power, and advantage of the present invention is:
1. the utility model control principle simple possible, used components and parts are few, install simple, the stringing wiring is convenient, cost is low, and be easy to realize, only draw pressure oil to hydraulic accumulator, can realize effectively that the recovery of energy is used, and the installation site concentrates on rotary motor one side from the oil inlet and outlet of rotary motor;
2. the mechanical energy that the inertia when in the time of will braking because excavator top is turned round produces is converted to the hydraulic pressure energy, comes recycling; Only adopt Hydraulic Elements, do not need electric elements, compare with electricity mixed power, the weight of unit power is little, and volume is little, and it is little to take up room, and installs with maintenance very convenient;
3. it is convenient to handle control, and employing hydraulic valve and two-way variable displacement pump change pressure, flow and the flow direction of liquid stream and realize stepless speed regulation.Job security is easy to realize overload protection well;
4. compare with electricity mixed power, response is fast, and dynamic characteristic is good;
5. compare with electricity mixed power, hydraulic hybrid is all realized by hydraulic system and Hydraulic Elements, difficult manufacturing such as no high-voltage capacitance, generator motor, the electrical part that price is high, safety, green, environmental protection.
Description of drawings
Fig. 1 is the overall structure schematic diagram of an embodiment of the utility model;
Mark among the figure:
1. variable pump I; 2. variable pump II; 3. one way valve; 4. reversal valve I; 5. accumulator; 6. shuttle valve I, 7. reversal valve II; 8. shuttle valve II.
The specific embodiment
With reference to the accompanying drawings, in conjunction with an embodiment, the excavator hydraulic hybrid device that the utility model is provided is described in detail.
Embodiment
With reference to Fig. 1, the excavator hydraulic hybrid device of present embodiment, be connected with the hydraulic gyration motor of excavator, it comprises variable pump I 1, the variable pump II 2 of opposing connection, and one way valve 3, reversal valve I 4, reversal valve II 7, accumulator 5, shuttle valve I 6, shuttle valve II 8, the shuttle valve two ends connect the oil inlet and outlet of rotary motor, variable pump I, variable pump II are connected with two shuttle valves by reversal valve respectively, accumulator 5 is connected with reversal valve I 4, and variable pump II 2 is connected with accumulator 5 by one way valve 3.
The excavator hydraulic hybrid device of present embodiment, hypothesis A mouth oil-feed when rotary motor begins the forward revolution, the B mouth is fuel-displaced, the hydraulic oil that the rotary motor hydraulic system produces is ended to reversal valve II behind shuttle valve II by the A mouth, pressure oil before the hydraulic braking this moment time-delay valve is 0, can not open reversal valve II.Although the pilot pressure of revolution guide operating valve simultaneously also is transported to reversal valve I, open reversal valve I, not storing the hydraulic pressure that hydraulic pressure can or store in the accumulator 5 as yet can discharge.Variable pump II stops, and can not drive variable pump I rotation.
When the forward revolution is finished, during rotary braking, pressure oil before the hydraulic braking time-delay valve is directed to reversal valve II, opens reversal valve II, the hydraulic oil that the rotary motor hydraulic system produces by the B mouth through shuttle valve I and reversal valve II entering variable pump I, this moment, variable pump I used as hydraulic motor, drive variable pump II rotation, open one way valve 3, this moment, reversal valve I ended, to accumulator 5 pressurisings, finish the pressurising process.Mechanical energy when rotary motor is braked like this is converted into the hydraulic pressure energy, and hydraulic pressure can be converted into mechanical energy by variable pump I.Mechanical energy is converted into the hydraulic pressure energy again by variable pump II, stores at accumulator.
When reverse rotation, the pilot pressure of revolution guide operating valve also is transported to reversal valve I, reversal valve II simultaneously, open reversal valve I, reversal valve II,, the pressure oil in the accumulator is through reversal valve I entering variable pump II, and variable pump II uses as hydraulic motor, drive variable pump I, the pressure oil that variable pump I produces enters the oil-in of motor through reversal valve II and shuttle valve I, accumulator hydraulic pressure energy like this, and II is converted into mechanical energy by variable pump.Mechanical energy is converted into the hydraulic pressure energy again by variable pump I, to the rotary motor fuel feeding.Pressurising and release by accumulator constantly are recycled.
Claims (1)
1. excavator hydraulic hybrid device, be connected with the hydraulic gyration motor of excavator, it is characterized in that: it comprises variable pump I, the variable pump II of opposing connection, and one way valve, reversal valve, accumulator, shuttle valve, the shuttle valve two ends connect the oil inlet and outlet of rotary motor, variable pump I, variable pump II are connected with two shuttle valves by reversal valve respectively, and accumulator is connected with a reversal valve, and variable pump II is connected with accumulator by one way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020232332XU CN201746870U (en) | 2010-06-10 | 2010-06-10 | Hydraulic hybrid power device of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020232332XU CN201746870U (en) | 2010-06-10 | 2010-06-10 | Hydraulic hybrid power device of excavator |
Publications (1)
| Publication Number | Publication Date |
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| CN201746870U true CN201746870U (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020232332XU Expired - Fee Related CN201746870U (en) | 2010-06-10 | 2010-06-10 | Hydraulic hybrid power device of excavator |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858094A (en) * | 2010-06-10 | 2010-10-13 | 重汽集团专用汽车公司 | Hydraulic hybrid power system of excavator |
| CN102704524A (en) * | 2012-04-19 | 2012-10-03 | 华南理工大学 | Rotary energy saving system of hydraulic excavator |
| CN103790196A (en) * | 2014-01-17 | 2014-05-14 | 徐州徐工挖掘机械有限公司 | Movable arm potential energy recycle control device of hydraulic excavator |
| WO2015055042A1 (en) * | 2013-10-15 | 2015-04-23 | 徐州徐工挖掘机械有限公司 | Rotatory energy recycling control device for hydraulic excavator |
-
2010
- 2010-06-10 CN CN201020232332XU patent/CN201746870U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101858094A (en) * | 2010-06-10 | 2010-10-13 | 重汽集团专用汽车公司 | Hydraulic hybrid power system of excavator |
| CN101858094B (en) * | 2010-06-10 | 2016-07-06 | 中国重汽集团青岛重工有限公司 | Hydraulic hybrid power system of excavator |
| CN102704524A (en) * | 2012-04-19 | 2012-10-03 | 华南理工大学 | Rotary energy saving system of hydraulic excavator |
| CN102704524B (en) * | 2012-04-19 | 2014-06-11 | 华南理工大学 | Rotary energy saving system of hydraulic excavator |
| WO2015055042A1 (en) * | 2013-10-15 | 2015-04-23 | 徐州徐工挖掘机械有限公司 | Rotatory energy recycling control device for hydraulic excavator |
| US10287750B2 (en) | 2013-10-15 | 2019-05-14 | Xuzhou Xugong Excavator Machinery Co., Ltd | Rotatory energy recycling control device for hydraulic excavator |
| CN103790196A (en) * | 2014-01-17 | 2014-05-14 | 徐州徐工挖掘机械有限公司 | Movable arm potential energy recycle control device of hydraulic excavator |
| CN103790196B (en) * | 2014-01-17 | 2016-04-06 | 徐州徐工挖掘机械有限公司 | A kind of Hydraulic Excavator's Boom potential energy recovery control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SINOTRUK QINGDAO HEAVY INDUSTRY CO., LTD. Free format text: FORMER NAME: SPECIAL AUTOCARS CO, HEAVY AUTOMOBILE GROUP |
|
| CP03 | Change of name, title or address |
Address after: 266111 Jin Rong Road, Qingdao high tech Industrial Development Zone, Shandong, China, No. 369 Patentee after: China National Heavy Duty Truck Group qingdao heavy industry co., ltd. Address before: 266031 No. 141, Ruichang Road, Sifang District, Shandong, Qingdao Patentee before: Special Truck Company, CNHTC |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20170610 |