CN2072546U - Hydraulic shovel slewing system with reclaiming brake energy - Google Patents
Hydraulic shovel slewing system with reclaiming brake energy Download PDFInfo
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- CN2072546U CN2072546U CN 90216151 CN90216151U CN2072546U CN 2072546 U CN2072546 U CN 2072546U CN 90216151 CN90216151 CN 90216151 CN 90216151 U CN90216151 U CN 90216151U CN 2072546 U CN2072546 U CN 2072546U
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Abstract
The utility model relates to a hydraulic shovel slewing system which can reclaim brake energy. The utility model is characterized in that the utility model is provided with an energy saving circuit which can reclaim the brake energy of a slewing table and can make the brake energy of the slewing table realize the regeneration. The energy saving circuit is mainly composed of an accumulator connected with an oil motor in parallel, an unloading valve and a hydraulic one-way valve, and the energy saving circuit can be used as an independent device and is added in the present slewing system. When the slewing brake happens, the kinetic energy of the slewing table can be converted to hydraulic energy and is charged into the accumulator to realize energy reclamation. When the slewing table starts, during the primary stage, the reclaimed energy released by the accumulator can solely drive the hydraulic shovel slewing system, and an oil pump realizes unloading. When the pressure of the accumulator drops below the set pressure of the unloading valve, the oil pump and the accumulator can drive the hydraulic shovel slewing system together. The tests show that the energy can be saved by 30% and the smooth brake can be realized.
Description
The utility model relates to a kind of big inertia oil motor system of recyclable braking energy, the hydraulic crawler excavator rotary system of especially recyclable braking energy.
At present, the rotary system of hydraulic crawler excavator generally is an open type oil motor system, and there is very big energy loss in the course of the work in this oil motor system.One of its reason is: for the flow of the dump pump of rotary motor oil fuel feeding is to determine by the maximum speed of turntable, so in the whole process that the turntable starting is quickened, the output flow of dump pump is always greater than the required flow of rotary motor oil, thereby the generation spill losses, this part energy loss can be imported half of energy up to system.Especially at the turntable starting initial stage, the rotary motor oil rotating speed is very low, needs flow seldom, and spillway discharge is maximum, and pressure fuel pump is the highest simultaneously, so system is in the high-pressure high-flow overflow situation, and the energy loss maximum.The another one reason of existing rotary system produce power loss is: in the turntable braking procedure, the kinetic energy that turntable has all is converted into heat energy through overload valve and is lost, and this part energy loss equals the energy that turntable is obtained in theory in starting process.Therefore, the energy that loses in a working cycles of hydraulic crawler excavator can reach the twice of effectively utilizing energy.For reducing the rotation energy loss of hydraulic crawler excavator, West Germany Liebherr (LIEBHER) company has developed the enclosed rotary system of hydraulic crawler excavator, but system complex, the cost costliness, in addition, if adopt the enclosed rotary system to need the existing whole hydraulic system of hydraulic crawler excavator is done basic change, these requirements make the manufacturer of hydraulic crawler excavator and user thereof be difficult to accept, and are restricted thereby it is applied.At present, has recyclable hydraulic crawler excavator rotary braking energy and make the open type rotary system of its regeneration function still not have report at home and abroad.
The utility model aims to provide a kind of simple in structure, increase at cost under the prerequisite of the existing hydraulic system other parts of little and constant hydrodynamic pressure excavator, formed by the transformation of open type rotary system, recyclable turntable braking energy also makes the energy-conservation rotary system of its regeneration.While is starting and the braking ability in order to improve turntable also, has increased the stationarity of braking, improves the application life of system element.
Task of the present utility model is by changing the overload valve braking in the existing open type rotary system of hydraulic crawler excavator into the accumulator braking, has increased that braking energy based on accumulator and unloader reclaims with the regenerative circuit realization.The braking of the inertia kinetic energy of turntable and realization rotary motor oil when accumulator is used to reclaim the rotary motor oil braking.The effect of the unloader that communicates with the hydraulicchange-over valve oil pipeline is the duty of control dump pump, the control port of unloader communicates with accumulator and the set pressure of unloader is lower than maximum pressure in the accumulator of rotary motor oil braking back, that is: the unlatching of unloader and closure, and then the duty of oil pump is controlled by energy storage pressure.Braking is during turntable, is oil that the rotary motor oil of pump operating mode discharges and charges into accumulator and carry out topping up boost braking and energy recovery.During the turntable starting, from the control oil of controlling oil sources hydraulicchange-over valve is pushed the operating position, the hydraulic control one-way valve between accumulator and the rotary motor oil is opened simultaneously, and accumulator discharges the braking energy that is reclaimed and drives rotary motor oil.When energy storage pressure was higher than the unloader set pressure, unloader was opened, the dump pump off-load, and rotary motor oil is driven separately by accumulator.Have only when energy storage pressure drops to the set pressure that is equal to or less than unloader, unloader cuts out, and oil pump just begins the input energy to system.
Advantage of the present utility model is that this system can reclaim the braking energy of hydraulic crawler excavator turntable and is used, and energy-saving effect can reach 30%.The existing rotary system of hydraulic crawler excavator is maximum in turntable starting initial stage input power maximum and energy loss, and the rotary system that the utility model provides is exactly driven separately by accumulator at the starting initial stage, not only the noenergy loss exists, and system's input energy approximation is zero.Simultaneously, rising, braking steadily of turntable helps the raising in system element life-span.This system constitutes simple, and cost only be about 1/8 of an enclosed rotary system, has good practicality, is easy to be accepted by hydraulic crawler excavator manufacturer and user, has very big production meaning to reach promotion prospect widely.
Accompanying drawing be conform with the utility model theme embodiment.
Hydraulic crawler excavator rotary system to recyclable braking energy provided by the utility model elaborates with reference to the accompanying drawings:
As accompanying drawing, this system utilizes rotary motor oil (14) to drive turntable (36), the rotation direction of rotary motor oil (14) is by hydraulicchange-over valve (3) control, and the pressure oil of system's working connection is provided by dump pump (1), and the power of system is from prime mover (31).The power saving function of system is that the contained element of double dot dash line (35) has constituted the braking energy recovery and the regenerative circuit of this rotary system.The annexation of each element is in the formation of braking energy recovery and regenerative circuit and the system thereof: accumulator (4) is in parallel with rotary motor oil (14), and is in series with hydraulic control one-way valve (5) between the oil pipeline (15) of rotary motor oil (14) and the accumulator (4).The control oil channel (19) of hydraulic control one-way valve (5) is in parallel with the control oil channel (21) of hydraulicchange-over valve (3), and control oil channel (21) communicates with the oil pipeline (23) of pilot valve (25).Be in series with hydraulic control one-way valve (6) between oil pipeline of rotary motor oil (16) and the accumulator (4), the control oil channel (20) of hydraulic control one-way valve (6) is in parallel with the control oil channel (22) of hydraulicchange-over valve (3), and control oil channel (22) communicates with the oil pipeline (24) of pilot valve (25).Between the oil pipeline (15) that hydraulic control one-way valve (7) is connected on rotary motor oil (14) and the oil pipeline (28) of hydraulicchange-over valve (3) and its control oil channel (27) communicate with the oil pipeline (29) of hydraulicchange-over valve (3).Between the oil pipeline (16) that hydraulic control one-way valve (8) is connected on rotary motor oil and the oil pipeline (29) of hydraulicchange-over valve (3) and its control oil channel (26) communicate with the oil pipeline (28) of hydraulicchange-over valve (3).Unloader (10) is in parallel with the oil pipeline (28) of hydraulicchange-over valve (3), and the control port of unloader (10) communicates with accumulator (4) through pipeline (33).Unloader (11) is in parallel with the oil pipeline (29) of hydraulicchange-over valve (3), and the control port of unloader (11) communicates with accumulator (4) through pipeline (34).The set pressure of unloader (10), (11) all is lower than the maximum pressure in rotary motor oil (14) the braking back accumulator (4), therefore the open and close of unloader (10), (11) are by the pressure control of accumulator (4), that is: as long as the pressure of accumulator (4) is higher than the pressure of unloader (10) or (11), unloader (10) or (11) just are in opening, and dump pump (1) just is in unloading condition.
The course of work of this rotary system is as follows:
1. the revolution first time of turntable (36), before this, rotary motor oil (14) is without braking procedure, and accumulator (4) does not reclaim braking energy as yet.After the operator pulls pilot valve (25) position, a left side (39), the control oil of control oil sources (38) makes hydraulicchange-over valve (3) be in position, a left side (17) through the oil pipeline (23) of pilot valve (25) and the control oil channel (21) of hydraulicchange-over valve (3), the oil that dump pump (1) is discharged is behind the oil pipeline (28) and hydraulic control one-way valve (7) of hydraulicchange-over valve (3), a part enters rotary motor oil (14) through oil pipeline (15), and the redundance that exceeds rotary motor oil (14) needs enters accumulator (4) through hydraulic control one-way valve (5) and stores.Quicken with turntable (36), the flow that enters rotary motor oil (14) increases.When the flow that enters rotary motor oil (14) equates with the flow of dump pump (1), pressure in the oil pipeline (15) descends, simultaneously, accumulator (4) discharges the fluid of being stored and enters rotary motor oil (14) through hydraulic control one-way valve (5) and oil pipeline (15).During the proceed-to-send of turntable (36), this emptying of oil base in the accumulator (4), for the braking energy that reclaims turntable (36) ready.When needing the turntable braking, pilot valve (25) can be turned back meta, hydraulicchange-over valve (3) returns meta simultaneously, hydraulic control one-way valve (7), (8) cut off the advancing of rotary motor oil (14), oil return line, rotary motor oil (14) continues the operating mode that revolution is pump under the inertia force effect of turntable (36), the oil of its discharge enters accumulator (4) through oil pipeline (16) and hydraulic control one-way valve (6) to carry out braking energy and reclaims, simultaneously, the pressure in accumulator (4) and the oil pipeline (16) raises and forms braking moment.
2. typical turning course: as long as rotary motor oil (14) has passed through once braking, accumulator (4) has just charged into pressure oil because of having reclaimed braking energy, and the revolution of carrying out after this is called typical case's revolution.The rotating starting process of typical case is divided two stages: the starting initial stage is that accumulator (4) drives dump pump (1) the off-load stage separately.When pilot valve (25) being pulled right position (37), the control oil of control oil sources (38) enters hydraulicchange-over valve (3) through pilot valve (25) and oil circuit (24) control oil channel (22), make hydraulicchange-over valve (3) be in right position (18), the pressure of control oil channel (20) makes hydraulic control one-way valve (6) reverse-conducting simultaneously, accumulator (4) discharges the braking energy that is reclaimed and enters rotary motor oil (14) through hydraulic control one-way valve (6) and oil pipeline (16), makes turntable (36) starting.At the starting initial stage, because the pressure of accumulator (4) is higher than the set pressure of unloader (11), so unloader (11) is opened, the oil that dump pump (1) is discharged flows back to fuel tank (30) through hydraulicchange-over valve (3), oil pipeline (29) and unloader (11), oil pump (1) is in unloading condition, and rotary motor oil (14) is driven by accumulator (4) separately.In this stage, because of dump pump (1) off-load, so prime mover (31) is in idling conditions, system's input energy is almost nil.The second stage of starting is that dump pump (1) and accumulator (4) are united the driving stage: discharge the braking energy that is reclaimed with accumulator (4), pressure in the accumulator (4) descends, when the pressure of accumulator (4) drops to the set pressure that is equal to or less than unloader (11), unloader (11) cuts out, cut off the unloading channel of dump pump (1), the oil that dump pump (1) is discharged is through the oil pipeline (29) of hydraulicchange-over valve (3), hydraulic control one-way valve (8) and oil pipeline (16) enter rotary motor oil (14), drive turntable (36) starting jointly with accumulator (4) and quicken.When proceed-to-send, the pressure in the oil pipeline (16) descends, and the oil in the accumulator (4) is discharged, and is ready for reclaiming braking energy.In turntable (36) when braking,, the oil that rotary motor oil (14) is discharged enters accumulator (4) through oil pipeline (15) and hydraulic control one-way valve (5) to carry out boost braking and energy of topping up and reclaims the repairing in oil pipeline (16) of while one way valve (13).During rotary motor oil (14) reversed turning, just the respective direction of oil stream changes and operating principle is turned round identical with above-mentioned typical case.Overflow valve (2) and (9) are respectively applied for the maximum pressure of restriction system maximum pressure and accumulator (4).
So far, illustrated rotary system provided by the utility model, use this system that obvious energy-saving effect is not only arranged, eliminated starting, braking is impacted, and braking energy reclaim with regenerative circuit partly can be used as one independently energy saver be attached in the existing hydraulic crawler excavator rotary system.This system is not only applicable to the hydraulic crawler excavator rotary system, and be applicable to that all frequently rise, the big inertia oil motor system of braking.
Claims (3)
1, a kind of hydraulic crawler excavator rotary system of recyclable braking energy.This system is provided with the rotary motor oil that drives turntable, the hydraulicchange-over valve of control rotary motor oil rotation direction and dump pump and prime mover that power is provided to system.It is characterized in that also being provided with the recovery and the regenerative circuit of turntable braking energy, accumulator (4) is in parallel with rotary motor oil (14), and the hydraulic control one-way valve (5) of having connected between the oil pipeline (15) of accumulator (4) and rotary motor oil (14), the hydraulic control one-way valve (6) of having connected between the oil pipeline (16) of accumulator (4) and rotary motor oil (14).The control oil channel (19) of hydraulic control one-way valve (5) is in parallel with the control oil channel (21) of hydraulicchange-over valve (3), and the control oil channel (20) of hydraulic control one-way valve (6) is in parallel with the control oil channel (22) of hydraulicchange-over valve (3).Unloader (10), (11) are in parallel with two oil pipelines (28), (29) of hydraulicchange-over valve (3) respectively, the control oil channel (33) of unloader (10), (11), (34) all communicate with accumulator (4), the hydraulic control one-way valve (8) of having connected between the hydraulic control one-way valve (7) of having connected between the oil pipeline (28) of hydraulicchange-over valve (3) and the oil pipeline (15) of rotary motor oil (14), the oil pipeline (29) of hydraulicchange-over valve (3) and the oil pipeline (16) of rotary motor oil (14).
2, according to the hydraulic crawler excavator rotary system of the described recyclable braking energy of claim 1, it is characterized in that the set pressure of unloader (10), (11) all is lower than the maximum pressure of rotary motor oil (14) braking back accumulator (4), as long as the pressure of accumulator (4) is higher than the set pressure of unloader (10) or (11), dump pump (1) just is in unloading condition.
3, according to the hydraulic crawler excavator rotary system of the described recyclable braking energy of claim 1, it is characterized in that as long as hydraulicchange-over valve (3) is in position, a left side (17), hydraulic control one-way valve (5) just is in the reverse-conducting state, as long as hydraulicchange-over valve (3) is in right position (18), hydraulic control one-way valve (6) just is in the reverse-conducting state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90216151 CN2072546U (en) | 1990-07-10 | 1990-07-10 | Hydraulic shovel slewing system with reclaiming brake energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90216151 CN2072546U (en) | 1990-07-10 | 1990-07-10 | Hydraulic shovel slewing system with reclaiming brake energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2072546U true CN2072546U (en) | 1991-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90216151 Withdrawn CN2072546U (en) | 1990-07-10 | 1990-07-10 | Hydraulic shovel slewing system with reclaiming brake energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2072546U (en) |
Cited By (28)
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| CN1867737B (en) * | 2003-10-10 | 2010-04-28 | 株式会社小松制作所 | Travel vibration suppressing device for working vehicle |
| CN101113597B (en) * | 2007-07-27 | 2010-12-08 | 浙江工业大学 | Prime move output torque equalising control device |
| CN102021927A (en) * | 2010-11-10 | 2011-04-20 | 三一重机有限公司 | Rotary oil supply loop for hydraulic excavator |
| CN102094434A (en) * | 2011-01-11 | 2011-06-15 | 浙江大学 | System for differential recovery of potential energy of boom of oil liquid hybrid power excavating machine |
| CN102249154A (en) * | 2010-05-21 | 2011-11-23 | 上海三一科技有限公司 | Free-slewing cushion and brake hydraulic system and method used in crawler crane |
| CN102336370A (en) * | 2010-07-26 | 2012-02-01 | 徐州重型机械有限公司 | Rotating hydraulic system of crane and its control method |
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| CN102561444A (en) * | 2011-11-24 | 2012-07-11 | 柳工常州挖掘机有限公司 | Energy recovery excavator slewing system and control method thereof |
| CN101876595B (en) * | 2009-04-29 | 2012-09-05 | 中国水产科学研究院渔业机械仪器研究所 | Energy recovery test stand for hydraulic net-lifting winch |
| CN102704524A (en) * | 2012-04-19 | 2012-10-03 | 华南理工大学 | Rotary energy saving system of hydraulic excavator |
| CN102733442A (en) * | 2011-04-02 | 2012-10-17 | 柳工常州挖掘机有限公司 | Gyration energy recycling system of hydraulic excavator |
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| CN101463850B (en) * | 2007-12-17 | 2013-02-13 | 天津市华泰森淼生物工程技术有限公司 | Method and system for pressure relief energy recovery and recycle of superpressure plant in parallel |
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-
1990
- 1990-07-10 CN CN 90216151 patent/CN2072546U/en not_active Withdrawn
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| CN1867737B (en) * | 2003-10-10 | 2010-04-28 | 株式会社小松制作所 | Travel vibration suppressing device for working vehicle |
| CN101113597B (en) * | 2007-07-27 | 2010-12-08 | 浙江工业大学 | Prime move output torque equalising control device |
| CN101463850B (en) * | 2007-12-17 | 2013-02-13 | 天津市华泰森淼生物工程技术有限公司 | Method and system for pressure relief energy recovery and recycle of superpressure plant in parallel |
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| CN103893940A (en) * | 2014-04-16 | 2014-07-02 | 山东理工大学 | Energy-saving system for remote-control emergency fire-fighting robot |
| CN105715596A (en) * | 2014-12-18 | 2016-06-29 | 罗伯特·博世有限公司 | Hydrostatic Drive For A Slewing Gear, Slewing Gear Having Such A Drive And Mobile Working Machine Having Such A Slewing Gear |
| CN105715596B (en) * | 2014-12-18 | 2020-01-10 | 罗伯特·博世有限公司 | Hydrostatic drive for a slewing gear, slewing gear comprising such a drive |
| CN104912136A (en) * | 2015-05-28 | 2015-09-16 | 潍柴动力股份有限公司 | Excavator and rotational hydraulic system thereof |
| CN105805066A (en) * | 2016-05-06 | 2016-07-27 | 同济大学 | Dual-motor type energy recovery bedstand for hydraulic net hauling winch |
| CN105840598A (en) * | 2016-05-25 | 2016-08-10 | 华侨大学 | Driving system for automatic recovering and recycling of energy of rotary table of engineering machine |
| CN106193175A (en) * | 2016-08-31 | 2016-12-07 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic crawler excavator revolution energy conserving system |
| CN107939752A (en) * | 2017-10-10 | 2018-04-20 | 三重机有限公司 | Braking energy-saving hydraulic system and excavator |
| CN107939752B (en) * | 2017-10-10 | 2019-11-26 | 三一重机有限公司 | Braking energy-saving hydraulic system and excavator |
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