CN204982991U - Excavator swing arm decline hydraulic control system - Google Patents
Excavator swing arm decline hydraulic control system Download PDFInfo
- Publication number
- CN204982991U CN204982991U CN201520475503.4U CN201520475503U CN204982991U CN 204982991 U CN204982991 U CN 204982991U CN 201520475503 U CN201520475503 U CN 201520475503U CN 204982991 U CN204982991 U CN 204982991U
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- China
- Prior art keywords
- oil
- swing arm
- boom cylinder
- valve
- regeneration valve
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- Expired - Fee Related
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Abstract
The utility model provides an excavator swing arm decline hydraulic control system, including the volume adjustable hydraulic pump, the swing arm case, pressure sensor, boom cylinder, a controller, the regeneration valve, solenoid valve and oil tank etc, the variable pumps the hydraulic fluid port and links to each other with swing arm case oil inlet, two oil -outs of swing arm case are respectively with boom cylinder's no pole chamber and there is the pole chamber to link to each other, the regeneration valve oil inlet does not have the pole chamber with boom cylinder and links to each other, two oil -outs of regeneration valve link to each other with boom cylinder's have pole chamber and oil tank respectively, two oil -outs of solenoid valve are continuous with swing arm case decline control mouth and regeneration valve control mouth respectively, pressure sensor oil pressure response mouth does not have the pole chamber with boom cylinder and links to each other, and the input and the output of controller link to each other with pressure sensor output and solenoid valve control mouth respectively. The utility model discloses when swing arm decline operating mode, the transposition of control regeneration valve, the main pump does not have pole chamber fuel feeding for boom cylinder, when propping the turner condition, the transposition of control swing arm case, the main pump has pole chamber fuel feeding for boom cylinder, accomplishes and props the car action.
Description
Technical field
The utility model belongs to excavation machinery technical field, is specifically related to a kind of descending movable arm of excavator hydraulic control system.
Background technology
Large hydraulic excavator is widely used in mine construction, Opencut coal mine mining etc.Because large hydraulic digger operating device quality is large, generally all will by carrying out throttling to the oil return of boom cylinder rodless cavity, the speed that restriction swing arm declines, what have also needs by regenerative circuit by a part of rodless cavity oil return introducing rod chamber, to reduce the fuel delivery of main pump.In order to the requirement of satisfied support car, no matter be that swing arm declines or support car, boom cylinder rod chamber always has main pump fuel feeding, i.e. consumed power.In prior art, in order to control swing arm decrease speed, when swing arm declines, throttling is carried out to the oil return of boom cylinder rodless cavity; In order to the requirement of satisfied support car, boom cylinder rod chamber needs main pump fuel feeding always.
But prior art Problems existing is: 1, in order to control swing arm decrease speed, when swing arm declines, due to throttling will be carried out to the oil return of boom cylinder rodless cavity, like this when supportting car, limit support vehicle speed; 2, in order to the requirement of satisfied support car, the rod chamber of boom cylinder needs by main pump fuel feeding always, and like this when swing arm declines, the power consumed to swing arm rod chamber fuel feeding has just wasted.
Utility model content
The purpose of this utility model is to solve prior art Problems existing, there is provided a kind of descending movable arm of excavator hydraulic control system, this system energy automatic decision descending movable arm of excavator operating mode, and enable regeneration valve or swing arm spool according to operating mode, energy conservation, improves support vehicle speed.
The technical scheme that the utility model adopts is:
A kind of descending movable arm of excavator hydraulic control system, comprise volume adjustable hydraulic pump, swing arm spool, pressure sensor, boom cylinder, controller, regeneration valve, electromagnetic valve, pioneer pump and swing arm pilot-actuated valve, hydraulic oil container, swing arm spool, regeneration valve and electromagnetic valve all have an oil-in and two oil-outs, wherein: the oil-out of described variable pump is connected with the oil-in of swing arm spool, first oil-out of swing arm spool and the second oil-out are connected with the rodless cavity of boom cylinder and rod chamber respectively, and the oil return opening of swing arm spool is connected with fuel tank; The oil-in of described regeneration valve is connected with the rodless cavity of boom cylinder, first oil-out of regeneration valve and the second oil-out are connected with the rod chamber of boom cylinder and fuel tank respectively, the oil-in of electromagnetic valve is connected with swing arm pilot-actuated valve decline oil-out, and the control mouth that the first oil-out second oil-out of electromagnetic valve controls mouth and regeneration valve with the decline of swing arm spool is respectively connected; Pressure sensor oil pressure induction mouth is connected with boom cylinder rodless cavity, and its output is connected with the input of controller, and the output of controller is connected with the control mouth of electromagnetic valve.
In above-mentioned descending movable arm of excavator hydraulic control system, electromagnetic valve adopts two four-way electromagnetic reversing valves.
Compared with prior art, the beneficial effects of the utility model are:
1, when excavator is in swing arm decline operating mode, control regeneration valve by this hydraulic control system and replace, make main pump not to boom cylinder rod chamber fuel feeding, so swing arm relies on gravity to decline completely, energy conservation;
2, when excavator is in support turner condition, control swing arm spool by this hydraulic control system and replace, make main pump to boom cylinder rod chamber fuel feeding, complete the action of support car, and rodless cavity passes through swing arm spool without throttling return oil, be conducive to improving support vehicle speed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model specific embodiment;
Fig. 2 is control flow chart of the present utility model.
In figure, the title of each number designation respectively: 1-hydraulic oil container, 2-hydraulic pump, 3-swing arm spool, 4-pressure sensor, 5-boom cylinder, 6-controller, 7-regeneration valve, 8-electromagnetic valve, 9-pioneer pump, 10-swing arm pilot-actuated valve.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
As shown in Figure 1, a kind of descending movable arm of excavator hydraulic control system, it comprises volume adjustable hydraulic pump 2, swing arm spool 3, pressure sensor 4, boom cylinder 5, controller 6, regeneration valve 7, electromagnetic valve 8 and hydraulic oil container 1 etc., the oil-out of volume adjustable hydraulic pump 2 is connected with the oil-in of swing arm spool 3, first oil-out of swing arm spool 3 is connected with the rodless cavity of boom cylinder 5, its second oil-out is connected with the rod chamber of boom cylinder 5, and the oil return opening of swing arm spool 3 is connected with fuel tank; The oil-in of regeneration valve 7 is connected with the rodless cavity of boom cylinder 5, regeneration valve 7 first oil-out is connected with the rod chamber of boom cylinder 5, its second oil-out is connected with fuel tank, the oil-in of electromagnetic valve 8 is connected with the decline oil-out of swing arm pilot-actuated valve 10, its first oil-out controls mouth with the decline of swing arm spool 3 and is connected, and its second oil-out is connected with the control mouth of regeneration valve 7; Pressure sensor 4 is arranged on boom cylinder 5 rodless cavity place, and its oil pressure induction mouth is connected with boom cylinder 5 rodless cavity, and its output is connected with controller 6 input, and the output of controller 6 is connected with the control mouth of electromagnetic valve 8.Controller 6 in the present embodiment can adopt RC4-4 controller, and electromagnetic valve 8 adopts two four-way electromagnetic reversing valves.
Specific works principle of the present utility model is: pressure sensor 4 imports the rodless cavity pressure signal of the boom cylinder 5 collected into controller 6, and controller 6 judges operating mode according to the pressure of boom cylinder 5 rodless cavity, preset threshold pressure P in controller 6
l, when rodless cavity pressure P w is more than or equal to critical pressure P
ltime, judge that excavator is as decline operating mode, then controller 6 does not export the signal of telecommunication, and electromagnetic valve 8 is in left position under spring force, and (the spool left end of electromagnetic valve 8 has the spring being in compressive state, and spool pushes away to the right by spring force, then spool is in left position; Be energized to electromagnetic valve coil, then spool pushes away left by electromagnetic force, spool is just in right position), decline guide oil enters regeneration valve 7 through electromagnetic valve 8 and controls mouth, swing arm spool 3 is failure to actuate, and regeneration valve 7 replaces, and a part of oil return of boom cylinder 5 rodless cavity enters rod chamber through regeneration valve 7, prevent rod chamber from inhaling empty, another part oil return oil sump tank after throttling; When rodless cavity pressure P
wbe less than critical pressure P
ltime, judge that excavator is as support turner condition, then controller 6 exports the signal of telecommunication, electromagnetic valve 8 obtains electric transposition to right position, decline guide oil enters swing arm spool through electromagnetic valve 8 and controls mouth, and swing arm spool 3 replaces, and main pump fuel feeding enters boom cylinder 5 rod chamber through swing arm spool 3, rodless cavity without throttling return oil, completes the action of support car by swing arm spool 3.
Claims (2)
1. a descending movable arm of excavator hydraulic control system, comprise volume adjustable hydraulic pump (2), swing arm spool (3), pressure sensor (4), boom cylinder (5), controller (6), regeneration valve (7), electromagnetic valve (8), pioneer pump (9) and swing arm pilot-actuated valve (10), hydraulic oil container (1), swing arm spool (3), regeneration valve (7) and electromagnetic valve (8) all have an oil-in and two oil-outs, it is characterized in that: the oil-out of described variable pump (2) is connected with the oil-in of swing arm spool (3), first oil-out of swing arm spool (3) and the second oil-out are connected with the rodless cavity of boom cylinder (5) and rod chamber respectively, the oil return opening of swing arm spool (3) is connected with fuel tank, the oil-in of described regeneration valve (7) is connected with the rodless cavity of boom cylinder (5), first oil-out of regeneration valve (7) and the second oil-out are connected with the rod chamber of boom cylinder (5) and fuel tank respectively, the oil-in of electromagnetic valve (8) is connected with swing arm pilot-actuated valve (10) decline oil-out, and the control mouth that the first oil-out second oil-out of electromagnetic valve (8) controls mouth and regeneration valve (7) with the decline of swing arm spool (3) is respectively connected, the oil pressure induction mouth of pressure sensor (4) is connected with boom cylinder (5) rodless cavity, its output is connected with the input of controller (6), and the output of controller (6) is connected with the control mouth of electromagnetic valve (8).
2. descending movable arm of excavator hydraulic control system according to claim 1, is characterized in that electromagnetic valve (8) adopts two four-way electromagnetic reversing valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520475503.4U CN204982991U (en) | 2015-07-03 | 2015-07-03 | Excavator swing arm decline hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520475503.4U CN204982991U (en) | 2015-07-03 | 2015-07-03 | Excavator swing arm decline hydraulic control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204982991U true CN204982991U (en) | 2016-01-20 |
Family
ID=55117373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520475503.4U Expired - Fee Related CN204982991U (en) | 2015-07-03 | 2015-07-03 | Excavator swing arm decline hydraulic control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204982991U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729479A (en) * | 2018-05-28 | 2018-11-02 | 柳州柳工挖掘机有限公司 | Bucket rod cylinder of excavator hydraulic control system and control method |
| CN110499799A (en) * | 2019-08-15 | 2019-11-26 | 青岛雷沃工程机械有限公司 | A kind of pilot valve and diverter take oil return line, loader hydraulic system and method |
| CN114541508A (en) * | 2022-03-29 | 2022-05-27 | 徐州徐工矿业机械有限公司 | Hydraulic excavator supporting self-adaptive system based on closed-loop control and using method |
| CN115492183A (en) * | 2022-11-03 | 2022-12-20 | 徐州徐工矿业机械有限公司 | Regenerative valve group, hydraulic system for excavator boom cylinder and hydraulic control method |
-
2015
- 2015-07-03 CN CN201520475503.4U patent/CN204982991U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729479A (en) * | 2018-05-28 | 2018-11-02 | 柳州柳工挖掘机有限公司 | Bucket rod cylinder of excavator hydraulic control system and control method |
| CN110499799A (en) * | 2019-08-15 | 2019-11-26 | 青岛雷沃工程机械有限公司 | A kind of pilot valve and diverter take oil return line, loader hydraulic system and method |
| CN114541508A (en) * | 2022-03-29 | 2022-05-27 | 徐州徐工矿业机械有限公司 | Hydraulic excavator supporting self-adaptive system based on closed-loop control and using method |
| CN115492183A (en) * | 2022-11-03 | 2022-12-20 | 徐州徐工矿业机械有限公司 | Regenerative valve group, hydraulic system for excavator boom cylinder and hydraulic control method |
| CN115492183B (en) * | 2022-11-03 | 2023-12-19 | 徐州徐工矿业机械有限公司 | Regeneration valve group, hydraulic system for movable arm oil cylinder of excavator and hydraulic control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20160703 |