CN103397679A - Movable arm energy-saving control system - Google Patents
Movable arm energy-saving control system Download PDFInfo
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- CN103397679A CN103397679A CN2013103279816A CN201310327981A CN103397679A CN 103397679 A CN103397679 A CN 103397679A CN 2013103279816 A CN2013103279816 A CN 2013103279816A CN 201310327981 A CN201310327981 A CN 201310327981A CN 103397679 A CN103397679 A CN 103397679A
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Abstract
本发明公开了一种液压挖掘机的动臂节能控制系统，包括第一油箱、变量泵、电动机、溢流阀、单向阀、三位三通电磁换向阀、动臂油缸、第一压力传感器、第一液控单向阀、二位三通电磁换向阀、第一二位二通电磁换向阀、第二油箱、第二二位二通电磁换向阀、第二压力传感器、定量马达、变量马达、光电编码器、第二液控单向阀、蓄能器、第三油箱、第三二位二通电磁换向阀、计算机。本发明以定量马达、变量马达组成的液压变压器作为能量转换元件、液压蓄能器为储能元件的液压式能量回收方式，具有安全、成本低、效率高等优点，在工程机械上具有较大的发展潜力，尤其对液压挖掘机的节能有重要发展潜力。
The invention discloses a boom energy-saving control system of a hydraulic excavator, which comprises a first oil tank, a variable pump, a motor, an overflow valve, a one-way valve, a three-position three-way electromagnetic reversing valve, a boom oil cylinder, a first pressure Sensor, first hydraulic control check valve, two-position three-way electromagnetic reversing valve, first two-position two-way electromagnetic reversing valve, second oil tank, second two-position two-way electromagnetic reversing valve, second pressure sensor, Quantitative motor, variable motor, photoelectric encoder, second hydraulic control check valve, accumulator, third oil tank, third two-position two-way electromagnetic reversing valve, computer. The present invention uses a hydraulic transformer composed of a fixed motor and a variable motor as an energy conversion element, and a hydraulic accumulator as an energy storage element. The hydraulic energy recovery method has the advantages of safety, low cost, and high efficiency, and has great advantages in construction machinery. Development potential, especially for the energy saving of hydraulic excavators has important development potential.
Description
Technical field
The present invention relates to the Construction Machinery Energy Saving field, relate in particular to a kind of swing arm energy-saving control system of movable arm potential energy recycling of hydraulic crawler excavator.
Background technology
In engineering machinery field, hydraulic crawler excavator is widely used, yet the utilization rate of its energy is lower, and when traditional Hydraulic Excavator's Boom descended, the decline potential energy of whole swing arm consumed on throttle orifice, and potential energy is converted into thermal loss and falls, and energy loss is serious.And the loss of these energy is all also the loss of electric energy simultaneously.The power consumption of engineering mechanical device is very large, improves the electric energy saving of equipment, is all significant to reduction or the energy-saving and emission-reduction of country of the cost of enterprise.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is for the deficiencies in the prior art, and a kind of swing arm energy-saving control system is provided.
In order to solve the problems of the technologies described above, the invention discloses a kind of swing arm energy-saving control system of hydraulic crawler excavator, comprise the first fuel tank, variable pump, overflow valve, 3-position-3-way solenoid operated directional valve, the first pressure sensor, the first hydraulic control one-way valve, two position, three-way electromagnetic change valve, the first bi-bit bi-pass solenoid operated directional valve, the second fuel tank, the second bi-bit bi-pass solenoid operated directional valve, the second pressure sensor, fixed displacement motor, variable displacement motor, photoelectric encoder, the second hydraulic control one-way valve, accumulator, the 3rd fuel tank, the 3rd bi-bit bi-pass solenoid operated directional valve, computer;
An interface of described the first fuel tank, variable pump, 3-position-3-way solenoid operated directional valve is pipeline communication successively, and two interfaces of all the other of 3-position-3-way solenoid operated directional valve are communicated with respectively rod chamber and the rodless cavity of boom cylinder; The rod chamber of boom cylinder successively with the first bi-bit bi-pass solenoid operated directional valve and the 3rd bi-bit bi-pass solenoid operated directional valve pipeline communication; The rodless cavity of boom cylinder successively with the first hydraulic control one-way valve, fixed displacement motor and the 3rd bi-bit bi-pass solenoid operated directional valve pipeline communication; The 3rd bi-bit bi-pass solenoid operated directional valve connects the 3rd fuel tank simultaneously; Between the rodless cavity of boom cylinder and described the first hydraulic control one-way valve, bypass is provided with two position, three-way electromagnetic change valve, and two position, three-way electromagnetic change valve is communicated with the first hydraulic control mouth of the first hydraulic control one-way valve simultaneously; Fixed displacement motor is connected connection with variable displacement motor, variable displacement motor pipeline respectively connects the second fuel tank and the second bi-bit bi-pass solenoid operated directional valve, and the second bi-bit bi-pass solenoid operated directional valve connects accumulator by the second hydraulic control one-way valve simultaneously;
Variable pump connects motor and by Motor Drive;
Described variable pump, 3-position-3-way solenoid operated directional valve, two position, three-way electromagnetic change valve, the first bi-bit bi-pass solenoid operated directional valve, variable displacement motor, the second bi-bit bi-pass solenoid operated directional valve and the 3rd bi-bit bi-pass solenoid operated directional valve are electrically connected to respectively described computer.
Be provided with the first pressure sensor that is connected computer between the rodless cavity of boom cylinder and described the first hydraulic control one-way valve.
In the present invention, be provided with the second pressure sensor that is connected computer between accumulator and the second hydraulic control one-way valve.
In the present invention, be provided with one way valve between variable pump and 3-position-3-way solenoid operated directional valve.
In the present invention, be provided with bypass duct between one way valve and 3-position-3-way solenoid operated directional valve and be communicated with the first fuel tank, this bypass duct is provided with overflow valve.
In the present invention, variable displacement motor is provided with the photoelectric encoder that connects computer.
In the present invention, computer is for detection of the data of the first pressure sensor, photoelectric encoder, the second pressure sensor, and by data, process, send signal, the rotating speed of control variables pump, pump/motor, the spool of 3-position-3-way solenoid operated directional valve, two position, three-way electromagnetic change valve, the first bi-bit bi-pass solenoid operated directional valve, the second bi-bit bi-pass solenoid operated directional valve, the 3rd bi-bit bi-pass solenoid operated directional valve moves.
The objective of the invention is by the effective monitoring circuit information of computer, send in real time control signal, guarantee the work of each element effective of loop, reclaim the gravitional force of Hydraulic Excavator's Boom, the hydraulic transformer that forms by fixed displacement motor and variable displacement motor is converted into hydraulic energy with potential energy, and is stored in accumulator, when swing arm rises, discharge the energy in accumulator, reach energy-conservation effect.
Beneficial effect: advantage of the present invention is the hydraulic transformer that forms take fixed displacement motor-variable displacement motor as energy conversion component, the hydraulic accumulator fluid pressure type energy way of recycling as energy-storage travelling wave tube, have that safety, cost are low, the efficiency advantages of higher, have larger development potentiality on engineering machinery, especially hydraulic crawler excavator energy-conservation had the important development potentiality.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the present invention is done further and illustrates, above-mentioned and/or otherwise advantage of the present invention will become apparent.
Fig. 1 is the hydraulic energy-saving control principle drawing that embodiment is used for the Hydraulic Excavator's Boom loop.
The specific embodiment
as shown in Figure 1, the invention discloses a kind of novel Hydraulic Excavator's Boom energy-saving control system, comprise the first fuel tank 1, variable pump 2, motor 3, overflow valve 4, one way valve 5, 3-position-3-way solenoid operated directional valve 6, described variable pump 2 entrances connect the first fuel tank 1, outlet is connected with one way valve 5 entrances, one way valve 5 outlets are connected with 3-position-3-way solenoid operated directional valve 6 interface one 6a, one way valve 5 is arranged on the outlet of variable pump 2, the normal operation of the compression shock image pump of on the one hand anti-locking system, the fluid of anti-locking system flows backwards through the blowback fuel tank when air pump inoperative on the other hand, motor 3 is used for driving variable pump 2 work, bypass between described variable pump 2 and the first fuel tank 1 is connected with an overflow valve 4, overflow valve 4 is used for the maximum pressure of the system that limits, play the effect of overload protection.
Described 3-position-3-way solenoid operated directional valve 6 has three interface 6a, 6b, 6c, two position, three-way electromagnetic change valve 10 has three interface 10a, 10b, 10c, the first bi-bit bi-pass solenoid operated directional valve 11 has two interface 11a, 11b, the second bi-bit bi-pass solenoid operated directional valve 16 has two interface 16a, 16b, the 3rd bi-bit bi-pass solenoid operated directional valve 20 has two interface 20a, 20b, boom cylinder 7 comprises rod chamber 7a and rodless cavity 7b, the first hydraulic control one-way valve 9 has the first hydraulic control mouth 9a, and the second hydraulic control one-way valve 17 has the second hydraulic control mouth 17a.
Described 3-position-3-way solenoid operated directional valve 6 comprises three interfaces, one way valve 5 outlet connecting interface one 6a, rodless cavity 7b connecting interface two 6b of boom cylinder 7, rod chamber 7a connecting interface three 6c of boom cylinder 7.
Described fixed displacement motor 12 right-hand members are connected to the rodless cavity 7b of boom cylinder 7 by a hydraulic control individual event valve 9, left end is connected with the 3rd bi-bit bi-pass solenoid operated directional valve 20 interface one 20a, hydraulic control individual event valve 9 right-hand members are connected with interface one 10a of two position, three-way electromagnetic change valve 10, interface three 10c of described two position, three-way electromagnetic change valve 10 are connected with the first hydraulic control mouth 9a, and interface two 20b of described the 3rd bi-bit bi-pass solenoid operated directional valve 20 are connected with the second fuel tank 21.
Interface one 11a of described the first bi-bit bi-pass solenoid operated directional valve 11 is connected with the rod chamber 7a of boom cylinder 7, and interface two 11b are connected with interface one 20a of the 3rd bi-bit bi-pass solenoid operated directional valve 20.
In the present invention, fixed displacement motor 12 is connected with variable displacement motor 13 is coaxial, variable displacement motor 13 is connected with a photoelectric encoder 14, variable displacement motor 13 right-hand members are connected with the 3rd fuel tank 15, left end is connected to interface one 16a of the second bi-bit bi-pass solenoid operated directional valve 16, fixed displacement motor 12 forms a hydraulic transformer with variable displacement motor 13, as the conversion element of energy.
In the present invention, accumulator 18 is connected with the second hydraulic control one-way valve 17 left ends, and the second hydraulic control one-way valve 17 right-hand members are connected to interface two 16a of the second bi-bit bi-pass solenoid operated directional valve 16, and the second unidirectional pilot operated valve device 17 left ends are connected with the second hydraulic control mouth 17a again.
In the present invention, the first pressure sensor 8 is connected with the rodless cavity 7b of boom cylinder 7, and the second pressure sensor 19 is connected with accumulator 18, and pressure sensor is for detection of the oil liquid pressure in loop.
In the present invention, computer 22 is for detection of the data of the first pressure sensor 8, photoelectric encoder 14, the second pressure sensor 19, and by data, process, send signal, the rotating speed of control variables pump 2, pump/motor 13, the spool of 3-position-3-way solenoid operated directional valve 6, two position, three-way electromagnetic change valve 10, the first bi-bit bi-pass solenoid operated directional valve 11, the second bi-bit bi-pass solenoid operated directional valve 16, the 3rd bi-bit bi-pass solenoid operated directional valve 20 moves.
Below concrete action and the Energy Saving Control process prescription of hydraulic circuit.
as shown in Figure 1, during descending movable arm of excavator, computer 22 sends signal, 3-position-3-way solenoid operated directional valve 6 left position work, interface 6a is communicated with interface 6c, hydraulic oil from the first fuel tank 1 through variable pump 2, one way valve 5 flows into the rod chamber 7a of boom cylinder 7 to the interface 6c of 3-position-3-way solenoid operated directional valve 6, hydraulic oil in the rodless cavity 7b of boom cylinder 7 flow to the first hydraulic control one-way valve 9, effect due to one way valve, loop is obstructed, this moment, the first pressure sensor 8 detected the rising of rodless cavity 7b pressure, computer 22 sends signal to two position, three-way electromagnetic change valve 10 after receiving data, make its left position work, interface 10a and 10c are communicated with, hydraulic oil in rodless cavity 7b is communicated with the first hydraulic control mouth 9a through interface 10a and 10c, when pressure raises, the first hydraulic control one-way valve 9 is opened, hydraulic oil in rodless cavity 7b flows into fixed displacement motor 12, fixed displacement motor 12 is started working, the gravitional force of swing arm is converted into the kinetic energy of fixed displacement motor 12.Because variable displacement motor 13 and fixed displacement motor 12 are coaxial connections, therefore variable displacement motor 13 is also started working, when photoelectric encoder 14 detects rate signal, computer 22 sends signal to the second bi-bit bi-pass solenoid operated directional valve 16, make its right position work, interface 16a is connected with 16b, variable displacement motor 13 sucks the hydraulic oil in the second fuel tank 15, fluid enters accumulator 18 through the second hydraulic control one-way valve 17, the potential energy of swing arm was converted into again hydraulic energy and was stored in accumulator 18 this moment, had realized the recovery of movable arm potential energy.This computer-chronograph 22 sends signal to the first bi-bit bi-pass solenoid operated directional valve 11, make its next work, interface 11a is communicated with 11b, and the hydraulic oil of the fixed displacement motor 12 of flowing through enters the rod chamber 7a of boom cylinder 7 through the first bi-bit bi-pass solenoid operated directional valve 11, realized flow regeneration.
In swing arm decline process, the potential energy of swing arm is converted into kinetic energy, be hydraulic energy by kinetic transformation again, realized the recovery of potential energy, the hydraulic transformer of fixed displacement motor 12 and variable displacement motor 13 compositions has been realized the conversion of this energy just, has effectively reclaimed potential energy, and the hydraulic oil in rodless cavity 7b flow into again rod chamber 7a, can prevent that stopper arms produces rod chamber because Action of Gravity Field descends rapidly and inhales sky, realized that the fluid in the rod chamber comes from rod chamber, both swing arm flow regeneration.
as shown in Figure 1, when excavator swing arm rises, computer 22 sends signal to 3-position-3-way solenoid operated directional valve 6, make its meta work, this moment, variable pump 2 was not worked, the energy that accumulator 18 will reclaim starts to discharge, hydraulic oil flows into the second hydraulic control mouth 17a of the second hydraulic control one-way valve 17, the second hydraulic control one-way valve 17 is opened, the hydraulic oil second bi-bit bi-pass solenoid operated directional valve 16 entering variable motors 13 of flowing through, variable displacement motor 13 is started working, fluid returns to the second fuel tank 15, also start working with its coaxial fixed displacement motor that is connected 12 simultaneously, computer 22 sends signal and makes the left position work of the 3rd bi-bit bi-pass solenoid operated directional valve 20, interface 20a is communicated with 20b, fixed displacement motor 12 sucks the hydraulic oil in the 3rd fuel tank 21, flow into the rodless cavity 7b of boom cylinder 7 through the first hydraulic control one-way valve 9, fluid in rod chamber 7a is through the first bi-bit bi-pass solenoid operated directional valve 11 at this moment, fixed displacement motor 12, the first hydraulic control one-way valve 9 enters rodless cavity 7b, excavator swing arm starts to rise, when the second pressure sensor 19 detects hydraulic oil in accumulator 18 and is not enough to drive variable displacement motor 13 work, computer 22 sends signal to 3-position-3-way solenoid operated directional valve 6 and variable pump 2, 3-position-3-way solenoid operated directional valve 6 right position work, interface 6a is communicated with 6c, variable pump 2 is started working, hydraulic oil is through one way valve 5, 3-position-3-way solenoid operated directional valve 6 enters the rodless cavity 7b of boom cylinder 7, swing arm continues to rise.
The second fuel tank 15, the 3rd fuel tank 21 need regularly to detect Fuel Oil Remaining wherein, and suitably oiling remains on the nominal situation level.
In the process that swing arm rises, the hydraulic oil that is stored in accumulator 18 drives variable displacement motor 13, variable displacement motor 13 output torques drive fixed displacement motor 12 and rotate, fixed displacement motor 12 and variable displacement motor 13 form hydraulic transformer rodless cavity 7b are delivered in fluid supercharging in boom cylinder 7 rod chamber 7a and the 3rd fuel tank 21, drive swing arm and rise; When the insufficient pressure of accumulator 18 is worked to drive hydraulic transformer, computer 22 will be switched to variable pump 2 fuel feeding, drive swing arm and continue to rise.This process implementation the recycling that recovers energy, reduced fuel consumption, reached energy-conservation purpose.
The invention provides a kind of swing arm energy-saving control system; method and the approach of this technical scheme of specific implementation are 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.In the present embodiment not clear and definite each ingredient all available prior art realized.
Claims (6)
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| CN201310327981.6A CN103397679B (en) | 2013-07-31 | 2013-07-31 | Movable arm energy-saving control system |
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| CN201310327981.6A CN103397679B (en) | 2013-07-31 | 2013-07-31 | Movable arm energy-saving control system |
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Cited By (8)
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| CN105133687A (en) * | 2015-09-14 | 2015-12-09 | 山河智能装备股份有限公司 | Start and stop control method and device for energy conservation device of excavator |
| CN105442658A (en) * | 2015-12-29 | 2016-03-30 | 太原理工大学 | Quick response power system for engineering machinery |
| CN105570210A (en) * | 2014-11-07 | 2016-05-11 | 中国石油化工股份有限公司 | Hydraulic brake circuit and brake method |
| CN107208672A (en) * | 2015-06-01 | 2017-09-26 | 日立建机株式会社 | The hydraulic control device of engineering machinery |
| CN107939753A (en) * | 2017-11-24 | 2018-04-20 | 福建新源重工有限公司 | A kind of excavator hydraulic oil case and fuel-flow control method |
| CN112388611A (en) * | 2020-10-15 | 2021-02-23 | 南京晨光集团有限责任公司 | Full hydraulic drive system for rotary motion of mechanical arm |
| CN113404730A (en) * | 2021-07-30 | 2021-09-17 | 华侨大学 | Steering system of electric loader based on hydraulic accumulator and variable displacement motor |
| CN115126731A (en) * | 2022-03-13 | 2022-09-30 | 南阳广正检测科技有限公司 | Environment-friendly energy-saving multi-working-condition potential energy recycling system for hoisting machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105570210A (en) * | 2014-11-07 | 2016-05-11 | 中国石油化工股份有限公司 | Hydraulic brake circuit and brake method |
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| CN112388611A (en) * | 2020-10-15 | 2021-02-23 | 南京晨光集团有限责任公司 | Full hydraulic drive system for rotary motion of mechanical arm |
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| CN113404730A (en) * | 2021-07-30 | 2021-09-17 | 华侨大学 | Steering system of electric loader based on hydraulic accumulator and variable displacement motor |
| CN113404730B (en) * | 2021-07-30 | 2023-05-05 | 华侨大学 | Steering system of electric loader based on hydraulic accumulator and variable motor |
| CN115126731A (en) * | 2022-03-13 | 2022-09-30 | 南阳广正检测科技有限公司 | Environment-friendly energy-saving multi-working-condition potential energy recycling system for hoisting machinery |
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