CN109440846A - A kind of excavator energy-saving hydraulic control system and working method - Google Patents
A kind of excavator energy-saving hydraulic control system and working method Download PDFInfo
- Publication number
- CN109440846A CN109440846A CN201811383014.0A CN201811383014A CN109440846A CN 109440846 A CN109440846 A CN 109440846A CN 201811383014 A CN201811383014 A CN 201811383014A CN 109440846 A CN109440846 A CN 109440846A
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- boom cylinder
- excavator
- energy
- accumulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
Abstract
The present invention relates to a kind of excavator energy-saving hydraulic control systems and working method, including the boom cylinder for driving excavator swing arm to act, the rodless cavity of the boom cylinder is connected by the oil inlet of the first control valve and accumulator, the oil outlet of accumulator is connected by the oil inlet of the second control valve and fixed displacement motor, the output shaft of the fixed displacement motor is connect by one-way clutch with gear drive, fixed displacement motor delivers power to gear drive, the output axis connection of gear drive and engine, impart power to engine output shaft, positive load is provided for engine, use hydraulic control circuit of the invention, reduce the fuel consumption of excavator, play energy-efficient effect.
Description
Technical field
The present invention relates to engineering mechanical device technical fields, and in particular to a kind of excavator energy-saving hydraulic control system
And working method.
Background technique
The attention rate of fuel consumption rate is continuously improved in the continuous rising of fuel price, client, manufactures the host of excavator
Factory is more and more, and market competition is more and more fierce, also higher and higher to the job requirements of excavator, existing excavator energy consumption compared with
The amount of fuel of height, consuming is larger, and in the excavator course of work, when swing arm declines, the potential energy of generation is wasted, cannot be good
It is utilized, wastes the energy, therefore it is urgent to provide a kind of hydraulic control circuits of excavator swing arm, can efficiently use under swing arm
The potential energy generated when drop reduces the energy consumption of excavator.
Summary of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of excavator to be controlled with energy-saving hydraulic
System, the potential energy that descending movable arm of excavator is generated is the positive load of supply engine, to reduce the output of engine
Torque, and then save the fuel consumption of engine.
To achieve the above object, the present invention adopts the following technical solutions:
A kind of excavator energy-saving hydraulic control system, it is hydraulic including the swing arm for driving excavator swing arm to act
The rodless cavity of cylinder, the boom cylinder is connected by the oil inlet of the first control valve and accumulator, and the oil outlet of accumulator is logical
The oil inlet for crossing the second control valve and fixed displacement motor connects, and the output shaft of the fixed displacement motor is passed by one-way clutch and gear
The connection of motivation structure, fixed displacement motor deliver power to gear drive, the output axis connection of gear drive and engine,
Engine output shaft is imparted power to, provides positive load for engine.
Further, the rodless cavity of the boom cylinder and rod chamber are connect with main valve, and the main valve and main pump connect
It connects, main pump is connected with hydraulic tank, and main pump can drive the hydraulic oil in hydraulic oil container to enter main valve, enters swing arm by main valve
Hydraulic cylinder.
Further, pressure sensor is installed on the pipeline that the main valve is connect with boom cylinder rodless cavity, it is described
Pressure sensor is used to detect the oil pressure in boom cylinder rodless cavity.
Further, the accumulation of energy, which rises, uses piston accumulator.
Further, the oil outlet of the fixed displacement motor is connected with hydraulic tank, and the hydraulic oil for flowing through fixed displacement motor passes through
The oil outlet of fixed displacement motor flows back to hydraulic oil container.
Further, the rod chamber of the boom cylinder is connected with hydraulic tank by high pressure check valve and counterbalance valve.
Further, the hydraulic oil container is connect with hydraulic oil cooling loop, is connected with leaf in the hydraulic cooling circuit
Piece pump, hydraulic oil radiator, the hydraulic oil radiator side are provided with cooling fan, the cooling fan to hydraulic oil radiator into
Row cooling.
The invention also discloses a kind of excavator working methods of energy-saving hydraulic control system, when swing arm declines, the
One control valve opens the hydraulic path of accumulator and boom cylinder rodless cavity, and the second control valve closes fixed displacement motor and accumulator
Hydraulic path, hydraulic oil by boom cylinder rodless cavity by the first control valve flow into accumulator, carry out accumulation of energy, pressure pass
Oil pressure in the rodless cavity of sensor real-time detection boom cylinder, when pressure reaches setting value, the work of the first control valve is closed
The hydraulic path of accumulator and boom cylinder rodless cavity, stops accumulation of energy, and accumulator and quantitative horse are opened in the work of the second control valve
The connecting path reached, hydraulic oil flow into fixed displacement motor through the second control valve, and fixed displacement motor output shaft imparts power to gear biography
Motivation structure, gear drive act on the output shaft of engine, generate positive load, reduce the output torque of engine.
Further, when swing arm declines, counterbalance valve work generates back pressure, and section hydraulic oil enters having for boom cylinder
Rod cavity carries out repairing to the rod chamber of boom cylinder.
Beneficial effects of the present invention:
Hydraulic control system of the invention, by the way that accumulator is arranged, the potential energy generated when can decline to swing arm is stored,
And the potential energy generated when being declined using swing arm acts on engine by fixed displacement motor, one-way clutch, gear drive
Output shaft generates positive load to engine output shaft, to reduce the output torque of engine, and then saves the fuel oil of engine
Consumption.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not constitute the restriction to the application for explaining the application.
Fig. 1 is hydraulic control system schematic diagram of the present invention；
Wherein, 1. boom cylinder, 1-1. rod chamber, 1-2. rodless cavity, 2. main valves, 3. main pumps, 4. hydraulic oil containers, 5. pressures
Force snesor, 6. first control valves, 7. accumulators, 8. second control valves, 9. fixed displacement motors, 10. one-way clutch, 11. gears
Transmission mechanism, 12. engines, 13. high pressure check valves, 14. counterbalance valves, 15. vane pumps, 16. hydraulic oil radiators, 17. is cooling
Fan.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, existing excavator fuel consumption rate is higher, and energy-saving effect is poor, asks for above-mentioned
Topic, present applicant proposes a kind of energy-saving boom cylinder control systems of excavator.
In a kind of exemplary embodiment of the application, as shown in Figure 1, a kind of excavator controls system with energy-saving hydraulic cylinder
System, including boom cylinder 1, the boom cylinder are used to control the work of swing arm, have inside the boom cylinder and live
Plug, piston connect with piston rod, and boom cylinder is divided into rod chamber 1-1 and rodless cavity 1-2 by piston, the rod chamber and without bar
Chamber is connect with main valve 2, and the main valve is connect with main pump 3, and main pump is connect with hydraulic oil container 4, and main pump can drive in hydraulic oil container
Hydraulic oil enter main valve, main valve control hydraulic oil enters the rod chamber and rodless cavity of boom cylinder, controls boom cylinder
Movement, the hydraulic connecting access of main pump and main valve, main valve and boom cylinder is hydraulic using existing excavator main valve and swing arm
The connecting path of cylinder, herein without describing in detail.
Pressure sensor 5, the pressure sensing are installed on the connecting line of the main valve and boom cylinder rodless cavity
Device can detecte the oil pressure in boom cylinder rodless cavity.
The rodless cavity of the boom cylinder is connect by the first control valve 6 with accumulator 7, and first control valve uses
3-position-3-way solenoid valve, the accumulator use piston accumulator, the oil inlet of 3-position-3-way solenoid valve and piston accumulator
Mouth connection, the oil outlet of the piston accumulator are connected to the second control valve 8, second control valve and fixed displacement motor 9
Oil inlet connection, second control valve use two-position two-way solenoid valve, and the oil outlet and hydraulic oil container of the fixed displacement motor connect
Logical, an interface of the 3-position-3-way solenoid valve is also connected to hydraulic oil container, after accumulator, which fills energy pressure, reaches setting value,
It is connected with the access of fuel tank connection for 3-position-3-way solenoid valve work, and the hydraulic oil in boom cylinder rodless cavity directly flows
Enter hydraulic oil container, stops accumulation of energy.It is provided between the oil inlet of the 3-position-3-way solenoid valve and piston accumulator unidirectional
Valve can prevent the hydraulic fluid leak in piston accumulator.
The output shaft of the fixed displacement motor is connected with gear drive 11, the gear drive by one-way clutch 10
The output axis connection of mechanism and engine, the gear drive include multiple pitch wheels, fixed displacement motor it is defeated
Shaft is connect with one of gear, drives its rotation, and as driving gear, engine output shaft is connect with a gear, should
Gear is as driven gear, and by gear engaged transmission between driving gear and driven gear, fixed displacement motor is delivered power to
Power is passed to the output shaft of engine by the output shaft of engine, fixed displacement motor by gear drive, is engine
Output shaft provides positive load, reduces the output torque of engine output shaft.
The rod chamber of the boom cylinder is connected with counterbalance valve 13 by high pressure check valve 12, the counterbalance valve with it is hydraulic
Fuel tank connection, the counterbalance valve can produce back pressure, and when swing arm declines, swing arm spool is mobile, under the action of counterbalance valve, hydraulic oil
Rod chamber is entered by hydraulic oil container, repairing can be carried out to the rod chamber of boom cylinder, boom cylinder rod chamber is avoided to generate
Emptying phenomenon.
The hydraulic oil container is also connected with hydraulic oil cooling loop, the hydraulic oil cooling loop be equipped with vane pump 14,
The side of hydraulic oil radiator 15, the hydraulic oil radiator is equipped with cooling fan 16, and the cooling fan connect with solenoid valve, passes through
The motor of solenoid valve control cooling fan, to obtain target cooling fan revolving speed, the hydraulic oil cooling loop uses existing digging
Hydraulic oil cooling loop on pick machine, herein without describing in detail.
The invention also discloses a kind of excavator working method of energy-saving swing arm hydraulic control system, main pump drives liquid
Hydraulic oil in pressure oil case enters main valve, and enters the rod chamber and rodless cavity of boom cylinder by main valve, drives swing arm liquid
The work of cylinder pressure, pressure sensor can flow back into liquid with the pressure information in real-time detection boom cylinder rodless cavity, hydraulic oil
Pressure oil case, the hydraulic oil in hydraulic oil container enter under the action of vane pump it is hydraulic have cooling circuit, in hydraulic oil radiator
It is cooled down under effect, and passes back into hydraulic oil container.
When descending movable arm of excavator, the control system of excavator controls the work of the first control valve, the conducting of the first control valve
The hydraulic path of boom cylinder rodless cavity and accumulator, hydraulic oil enter accumulator and carry out accumulation of energy, and pressure sensor is examined in real time
The oil pressure in rodless cavity is surveyed, when reaching setting pressure, the first control valve cuts off the hydraulic path of rodless cavity and accumulator, connection
The access of rodless cavity and hydraulic oil container, hydraulic oil flows into hydraulic oil container by the first control valve, while the second control valve works, and leads
Hydraulic path between logical accumulator and fixed displacement motor, hydraulic oil flows through fixed displacement motor, and is flowed back by the oil outlet of fixed displacement motor
Enter hydraulic oil container, the output shaft of fixed displacement motor delivers power to the output shaft of engine by gear drive, to start
Machine output shaft provides positive load, reduces the output torque of engine, and then saved the fuel consumption of engine.Fixed displacement motor
The hydraulic oil of outflow flows into hydraulic oil container.
Using boom cylinder control system of the invention, 20% or more fuel consumption is saved compared with equivalent specifications excavator.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (9)
1. a kind of excavator energy-saving hydraulic control system, which is characterized in that including for driving excavator swing arm to act
The rodless cavity of boom cylinder, the boom cylinder is connected by the oil inlet of the first control valve and accumulator, accumulator
Oil outlet is connected by the oil inlet of the second control valve and fixed displacement motor, and the output shaft of the fixed displacement motor passes through one-way clutch
Connect with gear drive, fixed displacement motor delivers power to gear drive, gear drive and engine it is defeated
Axis connection out imparts power to engine output shaft, provides positive load for engine.
2. a kind of excavator energy-saving hydraulic control system as described in claim 1, which is characterized in that the swing arm is hydraulic
The rodless cavity and rod chamber of cylinder are connect with main valve, and the main valve is connect with main pump, and main pump is connected with hydraulic tank, and main pump can
Hydraulic oil in driving hydraulic oil container enters main valve, enters boom cylinder by main valve.
3. a kind of excavator energy-saving hydraulic control system as described in claim 1, which is characterized in that the main valve and dynamic
Pressure sensor is installed on the pipeline of arm hydraulic cylinder rodless cavity connection, the pressure sensor for detect boom cylinder without
Oil pressure in rod cavity.
4. a kind of excavator energy-saving hydraulic control system as described in claim 1, which is characterized in that the accumulation of energy rises and adopts
Use piston accumulator.
5. a kind of excavator energy-saving hydraulic control system as claimed in claim 2, which is characterized in that the fixed displacement motor
Oil outlet be connected with hydraulic tank.
6. a kind of excavator energy-saving hydraulic control system as claimed in claim 2, which is characterized in that the swing arm is hydraulic
The rod chamber of cylinder is connected with hydraulic tank by high pressure check valve and counterbalance valve.
7. a kind of excavator energy-saving hydraulic control system as claimed in claim 2, which is characterized in that the hydraulic oil container
It is connect with hydraulic oil cooling loop, vane pump, hydraulic oil radiator is connected in the hydraulic cooling circuit, the hydraulic oil dissipates
Hot device side is provided with cooling fan, and the cooling fan carries out cooling to hydraulic oil radiator.
8. a kind of working method of excavator as claimed in claim 6 energy-saving hydraulic control system, which is characterized in that swing arm
When decline, the first control valve opens the hydraulic path of accumulator and boom cylinder rodless cavity, and the second control valve closes quantitative horse
Up to the hydraulic path with accumulator, hydraulic oil flows into accumulator by the first control valve by the rodless cavity of boom cylinder, carries out
Accumulation of energy, the oil pressure in the rodless cavity of pressure sensor real-time detection boom cylinder, when pressure reaches setting value, the first control
Valve work, closes the hydraulic path of accumulator and boom cylinder rodless cavity, stops accumulation of energy, and the work of the second control valve is opened and stored
Can device and fixed displacement motor connecting path, hydraulic oil flows into fixed displacement motor through the second control valve, and fixed displacement motor output shaft is by power
Gear drive is passed to, gear drive acts on the output shaft of engine, generates positive load, reduces the defeated of engine
Torque out.
9. working method as claimed in claim 8, which is characterized in that when swing arm declines, counterbalance valve work generates back pressure, portion
Liquid separation pressure oil enters the rod chamber of boom cylinder, carries out repairing to the rod chamber of boom cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811383014.0A CN109440846A (en) | 2018-11-20 | 2018-11-20 | A kind of excavator energy-saving hydraulic control system and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811383014.0A CN109440846A (en) | 2018-11-20 | 2018-11-20 | A kind of excavator energy-saving hydraulic control system and working method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109440846A true CN109440846A (en) | 2019-03-08 |
Family
ID=65554546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811383014.0A Pending CN109440846A (en) | 2018-11-20 | 2018-11-20 | A kind of excavator energy-saving hydraulic control system and working method |
Country Status (1)
| Country | Link |
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| CN (1) | CN109440846A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107561A (en) * | 2019-05-30 | 2019-08-09 | 湖南三一港口设备有限公司 | Heat dissipation system, heat dissipation method and engineering machinery |
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| JP2010084888A (en) * | 2008-10-01 | 2010-04-15 | Caterpillar Japan Ltd | Power regenerating mechanism of hydraulic working machine |
| CN102587444A (en) * | 2012-03-07 | 2012-07-18 | 浙江大学 | Oil hybrid system for excavator with energy differential recovery |
| JP2014119106A (en) * | 2012-12-19 | 2014-06-30 | Sumitomo Heavy Ind Ltd | Hydraulic circuit and control method therefor |
| CN203846541U (en) * | 2014-05-21 | 2014-09-24 | 徐工集团工程机械股份有限公司 | Life-prolonging hydraulic system of boom cylinder of loader |
| CN105386485A (en) * | 2015-12-03 | 2016-03-09 | 山河智能装备股份有限公司 | Hydraulic energy-saving control loop and control method of excavator |
| CN107345411A (en) * | 2017-08-03 | 2017-11-14 | 三重机有限公司 | Boom cylinder energy conserving system and its control method, excavator |
| CN207525807U (en) * | 2017-12-01 | 2018-06-22 | 贵州理工学院 | A kind of hydraulic drive circuit for excavator cooling system |
| CN209323586U (en) * | 2018-11-20 | 2019-08-30 | 青岛雷沃工程机械有限公司 | A kind of excavator energy-saving hydraulic control system |
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2018
- 2018-11-20 CN CN201811383014.0A patent/CN109440846A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2427662Y (en) * | 2000-05-12 | 2001-04-25 | 西南交通大学 | Energy-saving type integrated hydraulic source |
| JP2010084888A (en) * | 2008-10-01 | 2010-04-15 | Caterpillar Japan Ltd | Power regenerating mechanism of hydraulic working machine |
| CN102587444A (en) * | 2012-03-07 | 2012-07-18 | 浙江大学 | Oil hybrid system for excavator with energy differential recovery |
| JP2014119106A (en) * | 2012-12-19 | 2014-06-30 | Sumitomo Heavy Ind Ltd | Hydraulic circuit and control method therefor |
| CN203846541U (en) * | 2014-05-21 | 2014-09-24 | 徐工集团工程机械股份有限公司 | Life-prolonging hydraulic system of boom cylinder of loader |
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| CN207525807U (en) * | 2017-12-01 | 2018-06-22 | 贵州理工学院 | A kind of hydraulic drive circuit for excavator cooling system |
| CN209323586U (en) * | 2018-11-20 | 2019-08-30 | 青岛雷沃工程机械有限公司 | A kind of excavator energy-saving hydraulic control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107561A (en) * | 2019-05-30 | 2019-08-09 | 湖南三一港口设备有限公司 | Heat dissipation system, heat dissipation method and engineering machinery |
| CN110107561B (en) * | 2019-05-30 | 2020-08-04 | 湖南三一港口设备有限公司 | Heat dissipation system, heat dissipation method and engineering machinery |
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Address after: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Applicant after: LOVOL Engineering Machinery Group Co.,Ltd. Address before: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Applicant before: QINGDAO LOVOL ENGINEERING MACHINERY Co.,Ltd. |
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Address after: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Applicant after: Lovol Heavy Industry Group Co.,Ltd. Address before: 266500 No. 75 East Huanghe Road, Huangdao District, Qingdao City, Shandong Province Applicant before: LOVOL Engineering Machinery Group Co.,Ltd. |