CN103397679B - A kind of swing arm energy-saving control system - Google Patents
A kind of swing arm energy-saving control system Download PDFInfo
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- CN103397679B CN103397679B CN201310327981.6A CN201310327981A CN103397679B CN 103397679 B CN103397679 B CN 103397679B CN 201310327981 A CN201310327981 A CN 201310327981A CN 103397679 B CN103397679 B CN 103397679B
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Abstract
The invention discloses a kind of swing arm energy-saving control system of hydraulic crawler excavator, comprise the first fuel tank, variable pump, motor, overflow valve, one way valve, 3-position-3-way solenoid operated directional valve, boom cylinder, 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.The fluid pressure type energy regenerating mode that the present invention is energy-storage travelling wave tube using the hydraulic transformer of fixed displacement motor, variable displacement motor composition as energy conversion component, hydraulic accumulator, have that safety, cost are low, efficiency advantages of higher, engineering machinery has larger development potentiality, especially has important development potentiality to the energy-conservation of hydraulic crawler excavator.
Description
Technical field
The present invention relates to Construction Machinery Energy Saving field, particularly relate 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, but the utilization rate of its energy is lower, and when traditional Hydraulic Excavator's Boom declines, the decline potential energy of whole swing arm consumes on throttle orifice, and potential energy is that thermal loss falls, and energy loss is serious.And the loss of these energy is also all electric loss of energy simultaneously.The power consumption of engineering mechanical device is very large, improves the electric energy saving of equipment, be to the reduction of the cost of enterprise or the energy-saving and emission-reduction of country all significant.
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 swing arm energy-saving control system.
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;
The interface pipeline communication successively of described first fuel tank, variable pump, 3-position-3-way solenoid operated directional valve, all the other two interfaces of 3-position-3-way solenoid operated directional valve are communicated with rod chamber and the rodless cavity of boom cylinder respectively; 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; 3rd bi-bit bi-pass solenoid operated directional valve connects the 3rd fuel tank simultaneously; Between the rodless cavity of boom cylinder and described 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 coaxially connected with variable displacement motor, and variable displacement motor respectively pipeline 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 is driven by motor;
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 described computer respectively.
The rodless cavity of boom cylinder is provided with between described first hydraulic control one-way valve the first pressure sensor being connected computer.
In the present invention, between accumulator with the second hydraulic control one-way valve, be provided with the second pressure sensor being connected computer.
In the present invention, between variable pump and 3-position-3-way solenoid operated directional valve, be provided with one way valve.
In the present invention, be provided with bypass duct between one way valve with 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 connecting computer.
In the present invention, computer is for detecting the data of the first pressure sensor, photoelectric encoder, the second pressure sensor, and pass through data processing, 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 object of the invention is by the effective monitoring circuit information of computer, send control signal in real time, ensure the work of each element effective in loop, reclaim the gravitional force of Hydraulic Excavator's Boom, potential energy is hydraulic energy by the hydraulic transformer consisted of fixed displacement motor and variable displacement motor, and is stored in accumulator, when swing arm rises, energy in release accumulator, reaches energy-conservation effect.
Beneficial effect: the fluid pressure type energy regenerating mode that advantage of the present invention is is energy-storage travelling wave tube using the hydraulic transformer of fixed displacement motor-variable displacement motor composition as energy conversion component, hydraulic accumulator, have that safety, cost are low, efficiency advantages of higher, engineering machinery has larger development potentiality, especially has important development potentiality to the energy-conservation of hydraulic crawler excavator.
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 hydraulic energy-saving control principle drawing of embodiment for hydraulic excavator movable arm loop.
Detailed description of the invention
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 entrance connects the first fuel tank 1, outlet is connected with one way valve 5 entrance, one way valve 5 exports and is 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 work of the compression shock image pump of anti-locking system on the one hand, when air pump inoperative, the fluid of anti-locking system flows backwards through blowback fuel tank on the other hand, motor 3 works for driving variable pump 2, 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 restriction system, play the effect of overload protection.
Described 3-position-3-way solenoid operated directional valve 6 has three interfaces 6a, 6b, 6c, two position, three-way electromagnetic change valve 10 has three interfaces 10a, 10b, 10c, first bi-bit bi-pass solenoid operated directional valve 11 has two interfaces 11a, 11b, second bi-bit bi-pass solenoid operated directional valve 16 has two interfaces 16a, 16b, 3rd bi-bit bi-pass solenoid operated directional valve 20 has two interfaces 20a, 20b, boom cylinder 7 comprises rod chamber 7a and rodless cavity 7b, 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, and one way valve 5 exports 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 member is 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 member is 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 is connected with the first hydraulic control mouth 9a, and interface two 20b of described 3rd bi-bit bi-pass solenoid operated directional valve 20 is connected with the second fuel tank 21.
Interface one 11a of described 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 is 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 coaxially connected with variable displacement motor 13, variable displacement motor 13 is connected with a photoelectric encoder 14, variable displacement motor 13 right-hand member is 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 and variable displacement motor 13 form a hydraulic transformer, as the conversion element of energy.
In the present invention, accumulator 18 is connected with the second hydraulic control one-way valve 17 left end, and the second hydraulic control one-way valve 17 right-hand member is 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 end is 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 used for the oil liquid pressure in measure loop.
In the present invention, computer 22 is for detecting the data of the first pressure sensor 8, photoelectric encoder 14, second pressure sensor 19, and pass through data processing, 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, first bi-bit bi-pass solenoid operated directional valve 11, 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 is to the rod chamber 7a of the interface 6c inflow boom cylinder 7 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, due to the effect of one way valve, loop is obstructed, now the first pressure sensor 8 detects that rodless cavity 7b pressure raises, computer 22 sends signal after receiving the data to two position, three-way electromagnetic change valve 10, make its left position work, interface 10a with 10c is communicated with, hydraulic oil in rodless cavity 7b is communicated with the first hydraulic control mouth 9a through interface 10a with 10c, when pressure raises, 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 transform gravitational energy of swing arm is the kinetic energy of fixed displacement motor 12.Because variable displacement motor 13 is connected with fixed displacement motor 12 is coaxial, 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 and 16b is connected, hydraulic oil in second fuel tank 15 sucks by variable displacement motor 13, fluid enters accumulator 18 through the second hydraulic control one-way valve 17, now the potential energy of swing arm is converted into again hydraulic energy and is stored in accumulator 18, achieves 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 and 11b is communicated with, and the hydraulic oil flowing through fixed displacement motor 12 enters the rod chamber 7a of boom cylinder 7 through the first bi-bit bi-pass solenoid operated directional valve 11, achieves flow regeneration.
In swing arm decline process, the potential energy of swing arm is kinetic energy, be hydraulic energy by kinetic transformation again, achieve the recovery of potential energy, the hydraulic transformer that fixed displacement motor 12 and variable displacement motor 13 form just achieves the conversion of this energy, has effectively reclaimed potential energy, and the hydraulic oil in rodless cavity 7b flow into again rod chamber 7a, can rod chamber be made to produce suction sky because Action of Gravity Field declines rapidly by anti-stopper arms, the fluid achieved in 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, now variable pump 2 does not work, the energy of recovery is started release by accumulator 18, hydraulic oil flows into the second hydraulic control mouth 17a of the second hydraulic control one-way valve 17, second hydraulic control one-way valve 17 is opened, hydraulic oil flows through the second bi-bit bi-pass solenoid operated directional valve 16 entering variable motor 13, variable displacement motor 13 is started working, fluid returns the second fuel tank 15, also start working with its coaxial fixed displacement motor 12 be connected simultaneously, computer 22 sends signal and makes the 3rd bi-bit bi-pass solenoid operated directional valve 20 left position work, interface 20a and 20b is communicated with, hydraulic oil in 3rd fuel tank 21 sucks by fixed displacement motor 12, the rodless cavity 7b of boom cylinder 7 is flowed into through the first hydraulic control one-way valve 9, fluid now in rod chamber 7a is through the first bi-bit bi-pass solenoid operated directional valve 11, fixed displacement motor 12, first hydraulic control one-way valve 9 enters rodless cavity 7b, excavator swing arm starts to rise, when the hydraulic oil that the second pressure sensor 19 detects in accumulator 18 is not enough to drive variable displacement motor 13 to 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 and 6c is communicated with, 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.
Second fuel tank 15, the 3rd fuel tank 21 need periodic detection Fuel Oil Remaining wherein, suitably refuel and remain on nominal situation level.
In the process that swing arm rises, the hydraulic oil be stored in accumulator 18 drives variable displacement motor 13, variable displacement motor 13 output torque drives fixed displacement motor 12 to rotate, fixed displacement motor 12 and variable displacement motor 13 form hydraulic transformer and rodless cavity 7b are delivered in fluid supercharging in boom cylinder 7 rod chamber 7a and the 3rd fuel tank 21, drive swing arm to rise; When the insufficient pressure of accumulator 18 is to drive hydraulic transformer to work, computer 22 will be switched to variable pump 2 fuel feeding, drive swing arm to continue to rise.This process implementation recycling recovered energy, reduces fuel consumption, reaches energy-conservation object.
The invention provides a kind of swing arm energy-saving control 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 (1)
1. a swing arm energy-saving control system, it is characterized in that, 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;
The interface pipeline communication successively of described first fuel tank, variable pump, 3-position-3-way solenoid operated directional valve, all the other two interfaces of 3-position-3-way solenoid operated directional valve are communicated with rod chamber and the rodless cavity of boom cylinder respectively; 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; 3rd bi-bit bi-pass solenoid operated directional valve connects the 3rd fuel tank simultaneously; Between the rodless cavity of boom cylinder and described 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 coaxially connected with variable displacement motor, and variable displacement motor respectively pipeline 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 is driven by motor;
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 described computer respectively;
The rodless cavity of boom cylinder is provided with between described first hydraulic control one-way valve the first pressure sensor being connected computer;
The second pressure sensor being connected computer is provided with between accumulator with the second hydraulic control one-way valve;
One way valve is provided with between variable pump and 3-position-3-way solenoid operated directional valve;
Be provided with bypass duct between one way valve with 3-position-3-way solenoid operated directional valve and be communicated with the first fuel tank, this bypass duct is provided with overflow valve;
Variable displacement motor is provided with the photoelectric encoder connecting computer.
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| CN201310327981.6A CN103397679B (en) | 2013-07-31 | 2013-07-31 | A kind of swing arm energy-saving control system |
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| CN201310327981.6A CN103397679B (en) | 2013-07-31 | 2013-07-31 | A kind of swing arm energy-saving control system |
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| CN103397679B true CN103397679B (en) | 2015-12-02 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP6324347B2 (en) * | 2015-06-01 | 2018-05-16 | 日立建機株式会社 | Hydraulic control equipment for construction machinery |
| CN105133687B (en) * | 2015-09-14 | 2017-09-15 | 山河智能装备股份有限公司 | Excavator energy saver opens and closes control method and device |
| CN105442658B (en) * | 2015-12-29 | 2018-01-05 | 太原理工大学 | A kind of engineering machinery rapid-response power system |
| CN107939753B (en) * | 2017-11-24 | 2024-04-30 | 福建新源重工有限公司 | Hydraulic oil tank of excavator and oil quantity control method |
| CN112388611B (en) * | 2020-10-15 | 2022-06-21 | 南京晨光集团有限责任公司 | Full hydraulic drive system for rotary motion of mechanical arm |
| CN113404730B (en) * | 2021-07-30 | 2023-05-05 | 华侨大学 | Steering system of electric loader based on hydraulic accumulator and variable motor |
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| CN2482602Y (en) * | 2001-06-14 | 2002-03-20 | 浙江大学 | Energy economizer with accumulator for variable frequency drive hydraulic elevator |
| CN2705588Y (en) * | 2004-05-09 | 2005-06-22 | 浙江大学 | Energy saving closed loop hydraulic oil pumping unit |
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| WO2012145290A2 (en) * | 2011-04-18 | 2012-10-26 | Caterpillar Inc. | Load holding for meterless control of actuators |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009270660A (en) * | 2008-05-09 | 2009-11-19 | Caterpillar Japan Ltd | Hydraulic control system for working machine |
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| CN2482602Y (en) * | 2001-06-14 | 2002-03-20 | 浙江大学 | Energy economizer with accumulator for variable frequency drive hydraulic elevator |
| CN2705588Y (en) * | 2004-05-09 | 2005-06-22 | 浙江大学 | Energy saving closed loop hydraulic oil pumping unit |
| CN101654915A (en) * | 2009-09-01 | 2010-02-24 | 四川省成都普什机电技术研究有限公司 | Excavator energy-recuperation system |
| WO2012145290A2 (en) * | 2011-04-18 | 2012-10-26 | Caterpillar Inc. | Load holding for meterless control of actuators |
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