CN104278703B - Damping hydraulic controller for moving arm of excavator - Google Patents
Damping hydraulic controller for moving arm of excavator Download PDFInfo
- Publication number
- CN104278703B CN104278703B CN201410502377.7A CN201410502377A CN104278703B CN 104278703 B CN104278703 B CN 104278703B CN 201410502377 A CN201410502377 A CN 201410502377A CN 104278703 B CN104278703 B CN 104278703B
- Authority
- CN
- China
- Prior art keywords
- valve
- moving arm
- overflow valve
- excavator
- secondary pressure
- 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.)
- Active
Links
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a damping hydraulic controller for a moving arm of an excavator. The damping hydraulic controller comprises a hydraulic pump, a system overflow valve, two moving arm cylinders, a three-position electrohydraulic reversing valve, a pilot control valve, a two-stage pressure overflow valve and a two-stage pressure on-off valve. Two output ends of the three-position electrohydraulic reversing valve are connected with the rod cavity connection ends and the rodless cavity connection ends of the moving arm cylinders, respectively. One output end of the pilot control valve is sequentially connected with rod cavities of the moving arm cylinders respectively through the two-stage pressure on-off valve and the two-stage pressure overflow valve. The damping hydraulic controller has the advantages that when the moving arm descends, oil pressure of the rod cavities of the moving arm cylinders can be decreased from a high level to a medium level set by the two-stage pressure overflow valve, descending force of the moving arm is limited, the moving arm is stopped at a required position, the risk in raising the excavator for mine stone operations is effectively avoided, and safety of mine stone operations is improved; the excavator produces less vibration during leveling, and leveling comfort is improved.
Description
Technical field
The present invention relates to the hydraulic system of a kind of excavator, especially one be used for controlling descending movable arm of excavator stopping position
Put, reduce the device of excavator vibrations, belong to engineering machinery hydraulic drive technology field.
Background technology
Big-and-middle-sized excavator is used for mine cubic meter of stone operation, and its job position is many on dangerous steep cliff or clitter, deeply
Press arm under inevitably needing when digging operation, particularly new hand's not very familiar excavator characteristic, under carrying out, press arm behaviour
When making, because boom cylinder rod chamber oil pressure is too high, boom cylinder piston rod retract not in place then can lifting excavator, careless slightly
The major accident that excavator is tumbled will occur.
It addition, big-and-middle-sized excavator is when making leveling operation, because equipment (including swing arm, dipper and scraper bowl) is conducted oneself with dignity relatively
Greatly, when carrying out swing arm step-down operation, too high because of boom cylinder rod chamber oil pressure equally, boom cylinder piston rod can not stop at
Desired position, causes swing arm to be declined by less than position, then scraper bowl is easy to prick soil lifting excavator, is just not only affecting leveling operation
Often carry out, and bring bigger vibrations to excavator car load, reduce pilot control comfort.
Summary of the invention
It is an object of the invention to provide a kind of excavator swing arm damping fluid pressure control device, improve the excavator mine cubic meter of stone and make
The safety of industry, reduces vibrations during leveling operation, improves the manipulation comfort of leveling operation.
The present invention is achieved by the following technical programs:
A kind of excavator swing arm damping fluid pressure control device, including hydraulic pump, system overflow valve, two boom cylinders, three
Position electro-hydraulic directional valve, pilot-actuated valve, secondary pressure overflow valve and secondary pressure on-off valve, hydraulic pump outfan respectively be
System overflow valve and three electro-hydraulic directional valve two inputs are connected, and two outfans of pilot-actuated valve are electro-hydraulic with three respectively to be moved
Being connected to the valve two control end that surges, three electro-hydraulic directional valve two outfans rod chamber with two boom cylinders respectively is connected end
Connect end with rodless cavity to be connected；One outfan of pilot-actuated valve passes sequentially through secondary pressure on-off valve, secondary pressure overflow valve
Rod chamber with two boom cylinders is connected respectively.
The purpose of the present invention can also be realized further by techniques below measure.
Aforesaid excavator swing arm damping fluid pressure control device, wherein said secondary pressure overflow valve includes the first overflow valve
With the first check valve, described first check valve go side is connected with secondary pressure on-off valve, the first check valve not-go-end and the first overflow
The pilot control end of valve is connected, and the first overflow valve input rod chamber with two boom cylinders respectively is connected, the first overflow valve
Outfan leads to fuel tank；First check valve draining end leads to fuel tank.
Aforesaid excavator swing arm damping fluid pressure control device, wherein said secondary pressure on-off valve is two-position three-way electromagnetic
Reversal valve.
Aforesaid excavator swing arm damping fluid pressure control device, rod chamber or the rodless cavity of two of which boom cylinder pass through
Respective fluid pressure line is connected with corresponding relief valve group respectively.
Aforesaid excavator swing arm damping fluid pressure control device, wherein said relief valve group includes the second overflow valve and second
Check valve, described second overflow valve input and the second check valve not-go-end are connected, the second overflow valve outfan and the second check valve
Go side is logical fuel tank after being connected.
The present invention is additionally arranged two grades between the connection end of pilot-actuated valve one outfan and two boom cylinder rod chambers
Pressure relief valve, and control pilot-actuated valve and secondary pressure overflow valve and two swing arms by two position, three-way electromagnetic change valve
Cylinder rod chamber connects the connection of end.When swing arm declines, can by boom cylinder rod chamber oil pressure from 37～38MPa high pressure
Drop to the middle pressure of secondary pressure overflow valve sets 9～10MPa, limit the decline strength of swing arm and to make swing arm stop at required
On position, thus the danger of excavator lifting when efficiently avoid mine cubic meter of stone operation, improve the safety of mine cubic meter of stone operation
Property.The vibrations of excavator when can also reduce leveling operation, improve the manipulation comfort of leveling operation.
Advantages of the present invention and feature, by for illustration and explanation by the non-limitative illustration of preferred embodiment below,
These embodiments, are only used as example referring to the drawings and are given.
Accompanying drawing explanation
Fig. 1 is the hydraulic schematic diagram of the present invention.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, the present invention include hydraulic pump 1,2, two boom cylinders of system overflow valve 3, three electro-hydraulic move to
Valve 4, pilot-actuated valve 5, secondary pressure overflow valve 6 and secondary pressure on-off valve 7, hydraulic pump 1 outfan respectively with system overflow
Valve 2 is connected with first input end P1, the second input P2 of three electro-hydraulic directional valves 4, the first of three electro-hydraulic directional valves 4
Output terminals A the 1, the 3rd outfan B1 rod chamber with two boom cylinders 3 respectively is connected end and rodless cavity connects end and is connected.Three
Second output terminals A 2 of electro-hydraulic directional valve 4 is logical fuel tank 8, three electro-hydraulic directional valves of the present embodiment after being connected with oil revolving end O1
4 is three clematis stem electro-hydraulic directional valves.
First outfan 51 of pilot-actuated valve 5 surge with the first of three electro-hydraulic directional valves 4 control end 41 be connected, elder generation
Lead the second outfan 52 of control valve 5 control end 42 that surges with the second of three electro-hydraulic directional valves 4 to be connected, pilot-actuated valve 5
The first outfan 51 also pass sequentially through secondary pressure on-off valve 7, secondary pressure overflow valve 6 respectively with two boom cylinders 3
Rod chamber is connected.
Secondary pressure overflow valve 6 includes the first overflow valve 61 and the first check valve 62, described first check valve 62 go side with
The A3 end of secondary pressure on-off valve 7 is connected, and the pilot control end of the first check valve 62 not-go-end and the first overflow valve 61 is connected, and first
Overflow valve input 611 rod chamber with two boom cylinders respectively is connected, first overflow valve outfan the 612, first check valve
62 draining ends lead to fuel tank 8.Secondary pressure on-off valve 7 is two position, three-way electromagnetic change valve.
The rod chamber of two boom cylinders 3 or rodless cavity by respective fluid pressure line 31 respectively with corresponding relief valve group
9 are connected.Relief valve group 9 includes the second overflow valve 91 and the second check valve 92, the second overflow valve input 911 and the second check valve
92 not-go-end are connected, and the second overflow valve outfan 912 is logical fuel tank 8 after being connected with the second check valve go side, when two boom cylinders 3
When operating oil pressure is more than the setting oil pressure of the second overflow valve 91, the rodless cavity off-load of two boom cylinders 3, it is ensured that two swing arm oil
The safety of cylinder 3.In swing arm quick acting, when hydraulic pump 1 is for shortage of oil, opens the second check valve 92, mend to two boom cylinders 3
Oil.
When swing arm needs to decline, handle pilot-actuated valve 5 so that it is the pressure oil of the second outfan 52 surges control by second
End 42 processed promotes three electro-hydraulic directional valves 4 to commutate to left position, and the hydraulic oil that hydraulic pump 1 pumps out is through three electro-hydraulic directional valves
The 3rd outfan B1 of 4 leads to the rod chamber of two boom cylinders 3.Damping pattern, secondary pressure break-make is opened after pressing under swing arm
Valve 7 electric must commutate to left position, and the input P3 of secondary pressure on-off valve 7 connects with output terminals A 3, the guide of the first overflow valve 61
Control end open, 37～the hydraulic oil of 38MPa in the rod chamber of two boom cylinders 3 by first overflow valve 61 set 9～
The oil pressure off-load of 10MPa is substantially reduced to fuel tank 8, the rod chamber oil pressure of two boom cylinders 3, thus limits swing arm down-force
Amount so that it is desired position can be stopped at.
In addition to the implementation, the present invention can also have other embodiments, all employing equivalents or equivalent transformation shape
The technical scheme become, all falls within the protection domain of application claims.
Claims (1)
1. an excavator swing arm damping fluid pressure control device, including hydraulic pump, system overflow valve, two boom cylinders, three
Electro-hydraulic directional valve, pilot-actuated valve, secondary pressure overflow valve and secondary pressure on-off valve, hydraulic pump outfan respectively with system
Overflow valve and three electro-hydraulic directional valve two inputs are connected, two outfans of pilot-actuated valve respectively electro-hydraulic with three move to
The valve two control end that surges is connected, three electro-hydraulic directional valve two outfans rod chamber with two boom cylinders respectively be connected end and
Rodless cavity connects end and is connected；One outfan of pilot-actuated valve passes sequentially through secondary pressure on-off valve, secondary pressure overflow valve divides
It is not connected with the rod chamber of two boom cylinders；It is characterized in that, described secondary pressure overflow valve includes the first overflow valve and
One check valve, described first check valve go side is connected with secondary pressure on-off valve, the first check valve not-go-end and the first overflow valve
Pilot control end is connected, and the first overflow valve input rod chamber with two boom cylinders respectively is connected, and the first overflow valve exports
The logical fuel tank of end；First check valve draining end leads to fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410502377.7A CN104278703B (en) | 2014-09-28 | 2014-09-28 | Damping hydraulic controller for moving arm of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410502377.7A CN104278703B (en) | 2014-09-28 | 2014-09-28 | Damping hydraulic controller for moving arm of excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104278703A CN104278703A (en) | 2015-01-14 |
| CN104278703B true CN104278703B (en) | 2017-01-11 |
Family
ID=52254010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410502377.7A Active CN104278703B (en) | 2014-09-28 | 2014-09-28 | Damping hydraulic controller for moving arm of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104278703B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894731B (en) * | 2019-11-28 | 2024-04-30 | 徐工集团工程机械股份有限公司 | Working device buffer system and engineering equipment |
| CN112726693B (en) * | 2020-12-29 | 2022-07-05 | 山推工程机械股份有限公司 | Loader work vibration reduction control system and fuzzy control method |
| CN112942456B (en) * | 2021-01-29 | 2022-07-29 | 上海三一重机股份有限公司 | Loader mobile arm shock mitigation system and operation machinery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204199342U (en) * | 2014-09-28 | 2015-03-11 | 中外合资沃得重工（中国）有限公司 | Excavator swing arm damping fluid pressure control device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6422804B1 (en) * | 2000-02-18 | 2002-07-23 | Deere & Company | Inertia load dampening hydraulic system |
| DE102005038333A1 (en) * | 2005-08-11 | 2007-02-15 | Deere & Company, Moline | Hydraulic arrangement |
| DE102012208307A1 (en) * | 2012-05-18 | 2013-11-21 | Robert Bosch Gmbh | Damping device for wheeled loader, has hydropneumatic accumulator discharged through discharging valve according to operation of control valve when pressure at storage terminal is larger than pressure at power port |
| CN102705423B (en) * | 2012-06-11 | 2014-05-14 | 上海三一重机有限公司 | Vibration reduction valve and controlling method thereof and excavator |
| CN203498889U (en) * | 2013-08-19 | 2014-03-26 | 北京安期生技术有限公司 | Movable arm floating device of underground carrier-scraper |
-
2014
- 2014-09-28 CN CN201410502377.7A patent/CN104278703B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204199342U (en) * | 2014-09-28 | 2015-03-11 | 中外合资沃得重工（中国）有限公司 | Excavator swing arm damping fluid pressure control device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104278703A (en) | 2015-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101879881B1 (en) | Control circuit for energy regeneration and working machine | |
| CN104071709B (en) | A kind of crane controls system and crane with the fixing stepless luffing of auxiliary | |
| CN104278703B (en) | Damping hydraulic controller for moving arm of excavator | |
| CN102434512A (en) | Hydraulic cylinder synchronization control loop and crane with same | |
| CN202381427U (en) | Hydraulic oil cylinder synchronization control loop and crane using same | |
| CN107250563A (en) | Flow control valve for building machinery | |
| CN104265718B (en) | There is the handle pilot valve of float function | |
| CN105065352A (en) | Hydraulic synchronous lifting system for eccentric-load loading and unloading truck | |
| CN204199342U (en) | Excavator swing arm damping fluid pressure control device | |
| CN108104183A (en) | A kind of hydraulic excavator bucket regenerating unit and hydraulic crawler excavator | |
| CN102398866A (en) | Crane luffing control valve and crane luffing hydraulic system | |
| CN102478029A (en) | Hydraulic system | |
| CN202732527U (en) | Proportional overflow valve device | |
| CN105156381A (en) | Suction nozzle balance device for special sanitation truck | |
| CN202441660U (en) | Backpressure loop of bridge synchronous jacking hydraulic system | |
| CN102304931B (en) | Hydraulic energy-saving control system and method for loader movable arm | |
| CN202296922U (en) | Crane variable-amplitude control valve and crane variable-amplitude hydraulic system | |
| CN103206423A (en) | Hydraulic system and engineering machine | |
| CN103836020A (en) | High pressure and low pressure switching system of concrete pump and concrete pump | |
| CN109356218B (en) | Distribution valve for loader and loader hydraulic system | |
| CN203546778U (en) | Hydraulic system and excavator | |
| CN204127008U (en) | A kind of two move back piston hydraulic pressure valve group and twoly move back piston hydraulic pressure device | |
| CN210766969U (en) | Swing arm descending return oil reuse control device and excavator | |
| CN107461375A (en) | Complete-section tunnel boring machine is hinged hydraulic system | |
| CN106246621A (en) | Hydraulic circuit and engineering machinery for engineering machinery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20150114 Assignee: JIANGSU ZHENJI MACHINERY MANUFACTURING Co.,Ltd. Assignor: SINO-FOREIGN JOINT VENTURE WORLD HEAVY INDUSTRY (CHINA) Co.,Ltd. Contract record no.: X2023320000082 Denomination of invention: Shock-absorbing hydraulic control device of excavator boom Granted publication date: 20170111 License type: Common License Record date: 20230206 |
|
| EE01 | Entry into force of recordation of patent licensing contract |