CN101956405A - Gravitational potential energy recovery device during descending of engineering machinery movable arm - Google Patents
Gravitational potential energy recovery device during descending of engineering machinery movable arm Download PDFInfo
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- CN101956405A CN101956405A CN 201010226699 CN201010226699A CN101956405A CN 101956405 A CN101956405 A CN 101956405A CN 201010226699 CN201010226699 CN 201010226699 CN 201010226699 A CN201010226699 A CN 201010226699A CN 101956405 A CN101956405 A CN 101956405A
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Abstract
The invention relates to a gravitational potential energy recovery device during descending of an engineering machinery movable arm, comprising three parts, i.e. a hydraulic device for driving the movable arm to work, an accumulator device and a hydraulic system safety protection device, wherein the hydraulic device adopts two bidirectional quantitative hydraulic pumps-motors, an oil port thereof is respectively connected with a rod cavity of a movable arm cylinder (10) and an accumulator (9) by a connecting pipeline, and another oil port thereof is connected with a rodless cavity of the movable arm cylinder (10) by a connecting pipeline; the two bidirectional quantitative hydraulic pumps-motors are driven by mechanical transmission or driven coaxially; the flow ratio of the two bidirectional quantitative hydraulic pumps-motors is 1:(K-1), wherein K is the area ratio of the rodless cavity and the rod cavity of the movable arm cylinder; and the hydraulic system safety protection device mainly comprises three groups of overflowing valves and three groups of check valves which are respectively arranged on connecting pipelines.
Description
Technical field
The invention provides the gravitional force retracting device that a kind of engineering machinery swing arm descends, particularly a kind of closed hydraulic loop movable arm potential energy recovery system that adopts accumulator.
Background technology
Characteristics such as engineering machinery is big owing to consumption, oil consumption is high, discharging is poor, one of its efficient, energy-conservation target that has become domestic and international project mechanical investigations person pursuit.The energy-conservation research of engineering machinery system mainly launches from two aspects: based on the energy-conservation research of system control strategy and control method with based on the energy-conservation research of system architecture.Energy-conservation research based on system architecture comprises the energy-conservation research of reclaiming based on valve control system improvement, power source system improvement, energy.The energy-conservation research of the engineering machinery that reclaims based on energy comprises that mechanical type, fluid pressure type, electric energy reclaim.Fluid pressure type reclaims and adopts accumulator as energy-storage travelling wave tube, and accumulator can store and the release pressure energy, and its stable performance can be satisfied the requirement of engineering machinery fast energy-saving.Electric reclaims electric energy-storage travelling wave tube battery or the capacitors of adopting more), mechanical energy is converted into electrical power storage and utilization.
There are problems in present electric energy reclaiming method, is example with the hydraulic crawler excavator, and the energy of the hydraulic crawler excavator of studying on the engineering reclaims the potential energy recovery of main research swing arm and the recover kinetic energy of dipper at present.The overwhelming majority adopts the electric way of recycling.Because the cost of electric energy-storage travelling wave tube and generator is higher, has limited the application in practice of this recovery scheme.Substantially finish in 2s because of swing arm decline process, in the process that rotating speed changes significantly, the charge efficiency of the generating of generator and battery or electric capacity is lower, and mechanical energy, pressure energy, transforming repeatedly of electric energy also greatly reduce the utilization rate that energy reclaims simultaneously.
The present invention just is based on such background proposition.
Summary of the invention
The objective of the invention is to design a kind of shortcoming that can overcome existing engineering machinery energy-recuperation system, obtain the energy-saving scheme of the engineering machinery of energy recovery utilization rate better: the gravitional force retracting device that a kind of engineering machinery swing arm descends, easy in the hope of realizing, simple to operate, cost is low, reliable.
Above-mentioned purpose of the present invention is achieved through the following technical solutions, and accompanying drawings is as follows:
The gravitional force retracting device that a kind of engineering machinery swing arm shown in Figure 1 descends, its canonical system be by a boom cylinder, a motor, a pair of gear, two two-way quantitative hydraulic pump-motors, accumulator, three groups of overflow valves and one way valve composition.
Discharge capacity by selecting two two-way quantitative hydraulic pump- motors 4,5 and design gear are to 2,3 gearratio, and making the flow-rate ratio of two two-way quantitative hydraulic pumps-motor output is 1: (K-1), wherein K is the boom cylinder rodless cavity and the ratio of the area of rod chamber.
Satisfy system's (direction as shown in Figure 1) when motor just changes of aforementioned condition, the fluid of two-way constant displacement pump-motor 4 outputs leads to the boom cylinder rod chamber, and the swing arm cylinder shrinks, and swing arm descends, and establishing its flow is Q
1Under action of gravity, the fluid flow that swing arm cylinder rodless cavity is extruded should be KQ
1, this flow removes the flow Q that is siphoned away by pump-motor 4
1Outward, the part that has more (K-1) Q
1Siphoned away and be pressed in the accumulator by pump-motor 5, the gravitional force of swing arm is converted into the pressure energy of accumulator inner fluid.During the motor counter-rotating, extract fluid in two-way constant displacement pump-motor 4 slave arm cylinder rod chambers, its flow is Q
2, two-way constant displacement pump-motor 5 extracts fluid (K-1) Q from accumulator
2, it is KQ that the fluid of the two extraction converges the back flow
2Be injected into the swing arm rodless cavity, boom cylinder stretches out, and swing arm rises.Originally be stored in the gravitional force that pressure in the accumulator can be converted to swing arm again.
Aforementioned closed hydraulic loop system is equipped with overflow valve 7,11,15 and one way valve 8,12,16 respectively in the rod chamber of boom cylinder, connection oil circuit 6,13,14 that rodless cavity connects oil circuit and accumulator.From the flow analysis of front as can be seen, each path flow of this hydraulic system is balance in theory.These valve groups just are used under oil cylinder, pump-situations such as motor existence leakage for preventing what the flow imbalance was provided with.Above-mentioned energy-recuperation system has been compared following advantage with existing engineering machinery energy conserving system:
1. energy conversion number of times is few.The pressure that is stored in the accumulator can be able to directly be utilized.
2. controllability is good.Carry out the recovery control of pressure energy by pump-motor, compare with valve control hydraulic energy recovery system, the energy of recovery does not impact when recycling.
3, capacity usage ratio height.Since adopted closed type hydraulic system, motor start-up, and oil cylinder is started working; Motor stops, and oil cylinder quits work.Compare with common valve control hydraulic system and to have improved capacity usage ratio greatly.
4. system cost is low.System's critical piece comprises accumulator, variable-frequency motor or permagnetic synchronous motor, constant displacement pump-motor etc., and cost is low, and is safe and reliable.
5. reliability height.The present invention mainly concentrates in the commutation control and rotating speed control to motor the control of system, all is mature technology, is easy to realize the reliability height.
Description of drawings
Fig. 1 is a movable arm potential energy recovery system schematic diagram;
The gravitional force retracting device that Fig. 2 descends for the engineering machinery swing arm.
1 is that motor 1,2,3 is a pair of gear among the figure, and wherein 2 is the 1st gear, and 3 is the 2nd gear, and 4 is the 1st two-way quantitative hydraulic pump-motor, and 5 is the 2nd two-way quantitative hydraulic pump-motor, and 6 is the 1st connection oil circuit, and 14 is the 3rd connection oil circuit, and 13 is the 2nd connection oil circuit; 15,11,7 be respectively the 1st, 2,3 overflow valves, 16,12,8 are respectively the 1st, 2,3 one way valves, and 10 is hydraulic cylinder.
The specific embodiment
The gravitional force retracting device embodiment that descends below in conjunction with a kind of engineering machinery swing arm shown in the drawings further specifies particular content of the present invention.
The gravitional force retracting device that a kind of engineering machinery swing arm descends; comprise the hydraulic means that drives swing arm work; accumulator apparatus and hydraulic system safety guard three parts; described hydraulic means adopts two two-way quantitative hydraulic pump-motors; a hydraulic fluid port of two two-way quantitative hydraulic pump-motors links to each other with accumulator 9 with boom cylinder 10 rod chambers by connecting line respectively; another hydraulic fluid port of two two-way quantitative hydraulic pump-motors links to each other with boom cylinder 10 rodless cavities by connecting line; motor 1 drives or two two-way quantitative hydraulic pump-motors of Driven by Coaxial by machine driving; the flow-rate ratio of described two two-way quantitative hydraulic pumps-motor output is 1: (K-1); wherein K is the boom cylinder rodless cavity and the ratio of the area of rod chamber, and described hydraulic system safety guard mainly is made up of the 3 groups of overflow valves and the one way valve that are contained in respectively on the connecting line.
Described machine driving adopts a pair of gear,,, is set the gearratio of two gears and gets 1: (K-1) when the discharge capacity of choosing two bidirectional hydraulic pump-motors is identical through this two-way quantitative hydraulic pump-motor to two of gear distributed power rear drives by motor 1.
Described machine driving adopts a pair of gear, when the discharge capacity ratio of choosing two bidirectional hydraulic pump-motors is 1: in the time of (K-1), set the gearratio of two gears and got 1: 1.
Described machine driving adopts a pair of gear, the gearratio of choosing two gears and the discharge capacity of two two-way quantitative hydraulic pump-motors compare long-pending be 1/ (K-1).
Accumulator 9 is used to reclaim swing arm decline potential energy, the fluid that the boom cylinder rodless cavity is discharged when by the 2nd two-way quantitative hydraulic pump-motor 5 swing arm being descended is after the 1st two-way quantitative hydraulic pump-motor 4 charges into the boom cylinder rod chamber, the part that has more is pressed in the accumulator 9 and preserves, treat that two-way quantitative hydraulic pump-motor that this part pressure oil was moved when swing arm rose reclaims again, is used to promote swing arm and rises in the other direction.
Overflow valve and one way valve comprise the 1st, 2,3 overflow valves 15,11,7 and the 1st, 2,3 one way valves 16,12,8 that are contained on the 1st, 2,3 connecting lines 6,13,14, in order to the hypertonia that prevents to cause because of the flow imbalance and the generation of negative pressure emptying phenomenon.
A typical type of engineering machinery is a hydraulic crawler excavator, it is 2 oil cylinder that its boom cylinder adopts the ratio of rodless cavity area and rod chamber more, we have designed the gravitional force retracting device scheme that engineering machinery swing arm as shown in Figure 2 descends for this reason, it is an example among the present invention program shown in Figure 1, but the example of implementing the present invention program not only this.
Among Fig. 2, two with discharge capacity the 1st, 2 two-way quantitative hydraulic pump- motors 4,5 respectively with 1 coaxial linking to each other of motor, motor 1 adopts variable-frequency motor or permasyn morot.The 1st two-way quantitative hydraulic pump-motor 4 one hydraulic fluid ports are connected by the 1st connecting line 6 with the rod chamber of swing arm cylinder 10; Another hydraulic fluid port is connected with the rodless cavity of swing arm cylinder 10 by the 2nd connecting line 13 with after the 2nd two-way quantitative hydraulic pump-motor 5 one hydraulic fluid ports link to each other again; The 2nd two-way quantitative hydraulic pump-motor 5 another hydraulic fluid ports link to each other with accumulator 9 by connecting line 14.
1st, be respectively equipped with the 1st, 2,3 overflow valves 15,11,7 and the 1st, 2,3 one way valves 16,12,8 in 2,3 connecting lines 6,13,14.Three overflow valves guarantee that pipeline is no more than safe pressure, and three one way valves guarantee that the phenomenon that hydraulic oil is inhaled sky does not appear in pipeline in the course of work, play the effect of repairing.
Among Fig. 2, when motor 1 was just changeing, driving two two-way quantitative hydraulic pump-motors just changeed in the same way, because of discharge capacity equates, established its each delivery flow Q
3At this moment, the pressure oil of the 1st two-way quantitative hydraulic pump-motor 4 outputs is directly inputted to swing arm cylinder 10 rod chambers, the withdrawal of swing arm cylinder, and swing arm descends, and meanwhile the fluid of swing arm cylinder 10 rodless cavities is extruded, and its flow is 2Q
3, a part is delivered to swing arm cylinder 10 rod chambers by the 1st two-way quantitative hydraulic pump-motor 4, and flow is Q
3, another part flow Q
3Be input to accumulator 9 through the 2nd two-way quantitative hydraulic pump-motor 5, the gravitional force that swing arm descends is converted into the pressure of accumulator inner fluid and can stores.
When motor 1 counter-rotating, drive two two-way quantitative hydraulic pump-motors and reverse in the same way.At this moment, the 1st two-way quantitative hydraulic pump-motor 4 is delivered to swing arm cylinder 10 rodless cavities with the hydraulic oil of swing arm cylinder 10 rod chambers, and establishing its flow is Q
4The 2nd two-way quantitative hydraulic pump-motor 5 is delivered to swing arm cylinder 10 rodless cavities with the pressure oil liquid that stores in the accumulator 9 simultaneously, and its flow also is Q
4So sending into rodless cavity pressure oil flow summation is 2Q
4, just in time be the needed flow of flow equilibrium.The hydraulic oil of storage is used to promote the swing arm rising in the accumulator 9 in this process, and the energy of storage obtains recycling.
Claims (6)
1. the gravitional force retracting device that descends of an engineering machinery swing arm; comprise the hydraulic means that drives swing arm work; accumulator apparatus and hydraulic system safety guard three parts; it is characterized in that; described hydraulic means adopts two two-way quantitative hydraulic pump-motors; a hydraulic fluid port of two two-way quantitative hydraulic pump-motors links to each other with accumulator (9) with boom cylinder (10) rod chamber by connecting line respectively; another hydraulic fluid port of two two-way quantitative hydraulic pump-motors links to each other with boom cylinder (10) rodless cavity by connecting line; motor (1) drives or two two-way quantitative hydraulic pump-motors of Driven by Coaxial by machine driving; the flow-rate ratio of described two two-way quantitative hydraulic pumps-motor output is 1: (K-1); wherein K is the boom cylinder rodless cavity and the ratio of the area of rod chamber, and described hydraulic system safety guard mainly is made up of the 3 groups of overflow valves and the one way valve that are contained in respectively on the connecting line.
2. the gravitional force retracting device that a kind of engineering machinery swing arm according to claim 1 descends, it is characterized in that, described machine driving adopts a pair of gear, by motor (1) through this two-way quantitative hydraulic pump-motor to two of gear distributed power rear drives, when the discharge capacity of choosing two bidirectional hydraulic pump-motors is identical, sets the gearratio of two gears and get 1: (K-1).
3. the gravitional force retracting device that a kind of engineering machinery swing arm according to claim 1 descends, it is characterized in that, described machine driving adopts a pair of gear, when the discharge capacity ratio of choosing two bidirectional hydraulic pump-motors is 1: in the time of (K-1), set the gearratio of two gears and got 1: 1.
4. the gravitional force retracting device that a kind of engineering machinery swing arm according to claim 1 descends, it is characterized in that, described machine driving adopts a pair of gear, the gearratio of choosing two gears and the discharge capacity of two two-way quantitative hydraulic pump-motors compare long-pending be 1/ (K-1).
5. the gravitional force retracting device that descends according to claim 1,2,3 or 4 described a kind of engineering machinery swing arms, it is characterized in that, accumulator (9) is used to reclaim swing arm decline potential energy, by the 2nd two-way quantitative hydraulic pump-motor (5) fluid that the boom cylinder rodless cavity was discharged when swing arm was descended after the 1st two-way quantitative hydraulic pump-motor (4) charges into the boom cylinder rod chamber, the part that has more is pressed in the accumulator (9) and preserves, treat that two-way quantitative hydraulic pump-motor that this part pressure oil was moved when swing arm rose reclaims again, is used to promote swing arm and rises in the other direction.
6. the gravitional force retracting device that a kind of engineering machinery swing arm according to claim 5 descends, it is characterized in that, overflow valve and one way valve comprise the 1st, 2,3 overflow valves (15,11,7) and the 1st, 2,3 one way valves (16,12,8) that are contained on the 1st, 2,3 connecting lines (6,13,14), in order to the hypertonia that prevents to cause because of the flow imbalance and the generation of negative pressure emptying phenomenon.
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| CN 201010226699 CN101956405A (en) | 2010-07-15 | 2010-07-15 | Gravitational potential energy recovery device during descending of engineering machinery movable arm |
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| CN103276762A (en) * | 2013-05-28 | 2013-09-04 | 上海三一重机有限公司 | Structure for improving bucket rod suction and hydraulic excavator |
| CN103470544A (en) * | 2013-09-16 | 2013-12-25 | 愚公机械股份有限公司 | Energy-saving hoisting system of hydraulic crane |
| CN103924629A (en) * | 2014-04-15 | 2014-07-16 | 中国人民解放军63983部队 | Hydraulic excavator driving system with potential energy recovery function |
| CN104047932A (en) * | 2013-03-15 | 2014-09-17 | 宝钢工业炉工程技术有限公司 | Potential energy recovery system of lifting equipment and use method under non-stable load condition |
| CN104047934A (en) * | 2013-03-15 | 2014-09-17 | 宝钢工业炉工程技术有限公司 | Potential energy recovery system of lifting equipment and matching method during load continuous change |
| CN104047935A (en) * | 2013-03-15 | 2014-09-17 | 宝钢工业炉工程技术有限公司 | Potential energy recovery system of lifting equipment and use method under non-stable load condition |
| CN104878798A (en) * | 2015-04-01 | 2015-09-02 | 柳州柳工挖掘机有限公司 | Excavator |
| CN105201936A (en) * | 2014-10-16 | 2015-12-30 | 徐州重型机械有限公司 | Hydraulic system and crane |
| CN106662130A (en) * | 2014-08-01 | 2017-05-10 | 株式会社神户制钢所 | Hydraulic drive device |
| CN108298474A (en) * | 2017-12-26 | 2018-07-20 | 浙江大学 | A kind of fork truck energy saving system with speed-regulating function |
| CN108350914A (en) * | 2015-09-28 | 2018-07-31 | 博世力士乐株式会社 | Driven by Hydraulic Cylinder device |
| CN108468358A (en) * | 2018-03-15 | 2018-08-31 | 福建工程学院 | The excavator and its dynamical system of distributed hydraulic-driven |
| CN109267599A (en) * | 2018-12-10 | 2019-01-25 | 福建工程学院 | The excavator dynamical system that distributed two parallel pumps directly drive |
| CN111226008A (en) * | 2017-10-13 | 2020-06-02 | 斗山英维高株式会社 | Movable arm speed-increasing hydraulic system of engineering machinery |
| CN112594262A (en) * | 2020-12-16 | 2021-04-02 | 徐州徐工挖掘机械有限公司 | Energy recovery system for construction machine and construction machine |
| CN114294275A (en) * | 2021-12-31 | 2022-04-08 | 中冶赛迪技术研究中心有限公司 | Hydraulic control system of walking beam furnace |
| CN114606995A (en) * | 2022-03-30 | 2022-06-10 | 徐工集团工程机械股份有限公司科技分公司 | Electric hydraulic system and loader |
| EP4080062A1 (en) * | 2021-04-23 | 2022-10-26 | Norrhydro OY | Electrohydraulic actuator and method |
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| CN104047932A (en) * | 2013-03-15 | 2014-09-17 | 宝钢工业炉工程技术有限公司 | Potential energy recovery system of lifting equipment and use method under non-stable load condition |
| CN104047934A (en) * | 2013-03-15 | 2014-09-17 | 宝钢工业炉工程技术有限公司 | Potential energy recovery system of lifting equipment and matching method during load continuous change |
| CN104047935A (en) * | 2013-03-15 | 2014-09-17 | 宝钢工业炉工程技术有限公司 | Potential energy recovery system of lifting equipment and use method under non-stable load condition |
| CN104047932B (en) * | 2013-03-15 | 2016-03-30 | 宝钢工业炉工程技术有限公司 | The potential energy recovery system of jacking equipment under Vnsteady loads and using method thereof |
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| CN103276762B (en) * | 2013-05-28 | 2016-03-30 | 常熟华威履带有限公司 | A kind of structure and hydraulic crawler excavator improving bucket rod suction |
| CN103470544A (en) * | 2013-09-16 | 2013-12-25 | 愚公机械股份有限公司 | Energy-saving hoisting system of hydraulic crane |
| CN103924629A (en) * | 2014-04-15 | 2014-07-16 | 中国人民解放军63983部队 | Hydraulic excavator driving system with potential energy recovery function |
| CN106662130A (en) * | 2014-08-01 | 2017-05-10 | 株式会社神户制钢所 | Hydraulic drive device |
| CN105201936A (en) * | 2014-10-16 | 2015-12-30 | 徐州重型机械有限公司 | Hydraulic system and crane |
| CN104878798B (en) * | 2015-04-01 | 2017-03-29 | 柳州柳工挖掘机有限公司 | Excavator |
| CN104878798A (en) * | 2015-04-01 | 2015-09-02 | 柳州柳工挖掘机有限公司 | Excavator |
| CN108350914A (en) * | 2015-09-28 | 2018-07-31 | 博世力士乐株式会社 | Driven by Hydraulic Cylinder device |
| CN111226008A (en) * | 2017-10-13 | 2020-06-02 | 斗山英维高株式会社 | Movable arm speed-increasing hydraulic system of engineering machinery |
| CN108298474A (en) * | 2017-12-26 | 2018-07-20 | 浙江大学 | A kind of fork truck energy saving system with speed-regulating function |
| CN108468358A (en) * | 2018-03-15 | 2018-08-31 | 福建工程学院 | The excavator and its dynamical system of distributed hydraulic-driven |
| CN109267599A (en) * | 2018-12-10 | 2019-01-25 | 福建工程学院 | The excavator dynamical system that distributed two parallel pumps directly drive |
| CN112594262A (en) * | 2020-12-16 | 2021-04-02 | 徐州徐工挖掘机械有限公司 | Energy recovery system for construction machine and construction machine |
| EP4080062A1 (en) * | 2021-04-23 | 2022-10-26 | Norrhydro OY | Electrohydraulic actuator and method |
| CN114294275A (en) * | 2021-12-31 | 2022-04-08 | 中冶赛迪技术研究中心有限公司 | Hydraulic control system of walking beam furnace |
| CN114606995A (en) * | 2022-03-30 | 2022-06-10 | 徐工集团工程机械股份有限公司科技分公司 | Electric hydraulic system and loader |
| CN114606995B (en) * | 2022-03-30 | 2022-11-11 | 徐工集团工程机械股份有限公司科技分公司 | Electric hydraulic system and loader |
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