CN102518156B - System for accurately controlling the rotation of excavation end of loader digger - Google Patents
System for accurately controlling the rotation of excavation end of loader digger Download PDFInfo
- Publication number
- CN102518156B CN102518156B CN201210000822.0A CN201210000822A CN102518156B CN 102518156 B CN102518156 B CN 102518156B CN 201210000822 A CN201210000822 A CN 201210000822A CN 102518156 B CN102518156 B CN 102518156B
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- side oil
- oil
- cylinder
- rotation
- 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.)
- Expired - Fee Related
Links
Images
Abstract
A system for accurately controlling the rotation of the excavation end of a loader digger comprises a left side oil cylinder, a right side oil cylinder and a reversing valve, wherein the small cavity of the left side oil cylinder is connected with the large cavity of the right side oil cylinder; the large cavity of the left side oil cylinder is connected with the small cavity of the right side oil cylinder; the large cavities of the left and the right side oil cylinders are connected with two reversing oil parts of the reversing valve respectively; a pressure switch is arranged in the oil circuit of the large cavity of each oil cylinder; the two oil circuits are connected with each other through an oil circuit with a throttle valve and an electromagnetic valve; and the pressure switches are connected with the electromagnetic valve through delay relays respectively. The accurate control system benefits as follows: 1, static hydraulic braking is realized by balancing the pressure difference of the small and the larger cavities of the oil cylinders, so as to accurately control rotation; and 2, as the pressure switches control the rise of oil pressures in the oil cylinders caused by inertial impact, a sealing piece is protected effectively, and the service lives of the oil cylinders are prolonged.
Description
Technical field
The present invention relates to a kind of control system, particularly a kind of accurate control system of loader-digger rotation of excavation end that excavates swing arm rotation of realizing with angling cylinder control pivoting support.
Background technology
Loader-digger front and back end is respectively load terminal and digging end, and a same complete machine can be realized and loading and data mining duty, is therefore commonly called as " two is busy ".
The revolution of the digging end swing arm of loader-digger is at present by angling cylinder, to promote pivoting support to rotate, and pivoting support drives whole excavation swing arm to rotate.Angling cylinder comprises left and right angling cylinder, the large loculus interconnection of left and right angling cylinder, the also loculus fuel feeding to the angling cylinder of opposite side in the time of large chamber fuel feeding to a side angling cylinder, the piston rod of realizing a side angling cylinder stretches out cylinder body, the piston rod of opposite side angling cylinder shrinks in cylinder body, thereby realizes the rotation of angling cylinder promotion pivoting support.But after excavation swing arm turns an angle, need to stop while carrying out digging operation, because the effect of inertia excavation swing arm that excavates swing arm cannot rest on the position needing immediately and accurately, can swing back and forth and just finally stop several times.Particularly, when excavating the anxious stopping time of ± 45 ° of (now oil cylinder does not cushion) scopes of swing arm revolution, excavation swing arm can swing back and forth and just can stop for 5,6 times.Owing to excavating the effect of inertia of swing arm, the oil pressure in angling cylinder can raise rapidly, and two cavity pressures alternately rise to decay to be close to and equate, follow digging end to swing back and forth simultaneously.The rapid rising meeting that replaces of this oil pressure causes enormous impact to the seal of angling cylinder, affects the application life of seal, causes angling cylinder leakage of oil; This swinging back and forth can cause manipulation difficulty, location to be forbidden, and is difficult to realize rotating accurate manipulation.
Summary of the invention
Goal of the invention: the object of this invention is to provide the poor accurate control system of loader-digger rotation of excavation end of realizing the hydrostatic braking of a kind of size cavity pressure of capable of realizing balanced rotation oil cylinder rapidly.
Technical scheme: the accurate control system of a kind of loader-digger rotation of excavation end, comprise left side oil cylinder, right side oil cylinder, reversal valve, the loculus of described left side oil cylinder is connected with the large chamber of right side oil cylinder, the large chamber of described left side oil cylinder is connected with the loculus of right side oil cylinder, the large chamber of described left side oil cylinder and right side oil cylinder is connected with two commutation hydraulic fluid ports of reversal valve respectively, in the large chamber oil circuit of described left side oil cylinder and right side oil cylinder, be respectively equipped with pressure switch, between two oil circuits by being connected with the oil circuit of choke valve and electromagnetic valve; Two described pressure switches are respectively by time-delay relay control electromagnetic valve.When rotation of excavation end arrives assigned address, the confession oil return circuit of reversing valve operated cut-out left and right side oil cylinder; Because causing the piston rod of a side cylinder, digging end effect of inertia is compressed, therefore the large cavity pressure of this oil cylinder raises, but when pressure is elevated to pressure switch setting value, pressure switch is connected electromagnetic valve by time-delay relay, make the poor rapid balance of oil cylinder size cavity pressure, realize the hydrostatic braking, excavate swing arm static rapidly; Time-delay relay cuts off electromagnetic valve after the time of setting arrives, and the large loculus oil circuit of oil cylinder disconnects again.Between two cavity oil road, owing to being provided with choke valve, therefore in the anxious stopping time of digging end, not having too many fluid and flow to low pressure chamber to cause digging end beat, to realize real revolution, accurately manipulate.While excavating swing arm to opposite side stop turn, the in like manner pressure switch of opposite side action, realizes the hydrostatic braking.
Beneficial effect: 1, by the poor the hydrostatic braking of realizing of balancing cylinder size cavity pressure, reach the object of accurate revolution control; 2, in the angling cylinder causing due to inertia impact by pressure switch control, the rising of oil pressure, has protected seal effectively, has improved the application life of oil cylinder.
Accompanying drawing explanation
Fig. 1 is control principle drawing of the present invention.
The specific embodiment
As shown in the figure, the accurate control system of a kind of loader-digger rotation of excavation end, comprise left side oil cylinder 1, right side oil cylinder 2, reversal valve 3, the loculus of described left side oil cylinder 1 is connected with the large chamber of right side oil cylinder 2, the large chamber of described left side oil cylinder 1 is connected with the loculus of right side oil cylinder 2, the large chamber of described left side oil cylinder 1 and right side oil cylinder 2 is connected with two commutation hydraulic fluid ports of reversal valve 3 respectively, in the large chamber oil circuit of described left side oil cylinder 1 and right side oil cylinder 2, be respectively equipped with between pressure switch 4, two oil circuits by being connected with the oil circuit of electromagnetic valve 6 with choke valve 5; Two described pressure switches 4 are controlled electromagnetic valve 6 by time-delay relay 8 respectively.When digging end rotates back into finger position, reversing valve operated 3 cut off the oil return circuit that supplies of left and right side oil cylinders 1,2; Because causing the piston rod of a side cylinder, digging end effect of inertia is compressed, therefore the large cavity pressure of this oil cylinder raises, but pressure is elevated to pressure switch 4 while setting value, pressure switch 4 is connected electromagnetic valve 6 by time-delay relay 8, make the poor rapid balance of oil cylinder size cavity pressure, realize the hydrostatic braking, excavate swing arm static rapidly; Time-delay relay 8 cuts off electromagnetic valve 6 after the time of setting arrives, and the large loculus oil circuit of oil cylinder disconnects again.While excavating swing arm to opposite side stop turn, in like manner the pressure switch 4 of opposite side is moved, and realizes the hydrostatic braking.Time-delay relay delay time is set as 0.65-1 second, between two cavity oil road, owing to being provided with choke valve 5, therefore in the anxious stopping time of digging end, not having too many fluid and flows to low pressure chamber to cause digging end beat, to realize real revolution, accurately manipulates.
Claims (1)
1. the accurate control system of loader-digger rotation of excavation end, comprise left side oil cylinder (1), right side oil cylinder (2), reversal valve (3), the loculus of described left side oil cylinder (1) is connected with the large chamber of right side oil cylinder (2), the large chamber of described left side oil cylinder (1) is connected with the loculus of right side oil cylinder (2), the large chamber of described left side oil cylinder (1) and right side oil cylinder (2) is connected with two commutation hydraulic fluid ports of reversal valve (3) respectively, it is characterized in that: in the large chamber oil circuit of described left side oil cylinder (1) and right side oil cylinder (2), be respectively equipped with pressure switch (4), between two oil circuits, by band choke valve (5), be connected with the oil circuit of electromagnetic valve (6), two described pressure switches (4) are controlled electromagnetic valve (6) by time-delay relay (8) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210000822.0A CN102518156B (en) | 2012-01-04 | 2012-01-04 | System for accurately controlling the rotation of excavation end of loader digger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210000822.0A CN102518156B (en) | 2012-01-04 | 2012-01-04 | System for accurately controlling the rotation of excavation end of loader digger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102518156A CN102518156A (en) | 2012-06-27 |
| CN102518156B true CN102518156B (en) | 2014-04-16 |
Family
ID=46289200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210000822.0A Expired - Fee Related CN102518156B (en) | 2012-01-04 | 2012-01-04 | System for accurately controlling the rotation of excavation end of loader digger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102518156B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805877B (en) * | 2015-03-30 | 2018-03-06 | 徐州徐工挖掘机械有限公司 | A kind of flow control system of super-tonnage backacter dipper recovery |
| CN110409549A (en) * | 2019-06-28 | 2019-11-05 | 三一重机有限公司 | A kind of anti-rock hydraulic system, revolution executive device and excavator |
| CN113323070B (en) * | 2021-06-28 | 2022-03-25 | 雷沃工程机械集团有限公司 | Excavator movable arm hydraulic system and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101220601A (en) * | 2008-01-11 | 2008-07-16 | 长沙中联重工科技发展股份有限公司 | Hydrostatic transmission grader |
| CN101619580A (en) * | 2009-07-08 | 2010-01-06 | 三一重机有限公司 | Method and device for improving operation comfort of excavator |
| CN101981260A (en) * | 2008-03-26 | 2011-02-23 | 卡亚巴工业株式会社 | Controller of hybrid construction machine |
| CN202416405U (en) * | 2012-01-04 | 2012-09-05 | 江苏柳工机械有限公司 | Precision control system for slewing of digging end of loader-digger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100974275B1 (en) * | 2007-12-17 | 2010-08-06 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | shock absorption device and method thereof for excavator |
-
2012
- 2012-01-04 CN CN201210000822.0A patent/CN102518156B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101220601A (en) * | 2008-01-11 | 2008-07-16 | 长沙中联重工科技发展股份有限公司 | Hydrostatic transmission grader |
| CN101981260A (en) * | 2008-03-26 | 2011-02-23 | 卡亚巴工业株式会社 | Controller of hybrid construction machine |
| CN101619580A (en) * | 2009-07-08 | 2010-01-06 | 三一重机有限公司 | Method and device for improving operation comfort of excavator |
| CN202416405U (en) * | 2012-01-04 | 2012-09-05 | 江苏柳工机械有限公司 | Precision control system for slewing of digging end of loader-digger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102518156A (en) | 2012-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103089738B (en) | Straight line walking valve and controlling system achieving excavator straight line walking | |
| CN102518156B (en) | System for accurately controlling the rotation of excavation end of loader digger | |
| CN104047309A (en) | Controllable multi-connecting-rod loading machine with active metamorphic function | |
| CN204491710U (en) | A kind of mini-excavator Dual-pump flow-converging hydraulic circuit | |
| CN102140808A (en) | Device for enhancing excavating handling characteristics and levelling operation characteristics of excavator | |
| CN104047312A (en) | Simple multi-connecting-rod controllable loader with active metamorphic function | |
| CN202577399U (en) | Movable arm lifting priority control system in medium-sized hydraulic excavator negative flow system | |
| CN103321984B (en) | Hydraulic control system for differential oil compensation with electric-hydraulic proportional cartridge valves | |
| CN203188273U (en) | Excavator hydraulic control system and hydraulic excavator | |
| CN102296666B (en) | Pilot buffer device of excavator hydraulic motor | |
| CN102628284B (en) | Oil circuit control device for excavators | |
| CN102518612B (en) | Regeneration function implementing device for bucket arm of hydraulic excavator | |
| CN108915007B (en) | Excavator swing arm bucket rod economizer system | |
| CN102828536B (en) | Excavator convergent flow control system and excavator | |
| CN202416405U (en) | Precision control system for slewing of digging end of loader-digger | |
| CN105386477B (en) | Swing arm declines the device of energy absorption during a kind of excavator composite move | |
| CN204199341U (en) | A kind of Hydraulic Excavator's Boom oil cylinder regenerative circuit | |
| CN104153988B (en) | Distributing valve, pumping mechanism and concrete pump | |
| CN109183892A (en) | Equipment drives oil circuit and excavator | |
| CN202090373U (en) | Changeable regeneration structure of hydraulic excavator dipper handle | |
| CN104594405A (en) | Controllable excavating mechanism capable of keeping posture of big arm through active metamorphic function | |
| CN205225910U (en) | Swing arm hydraulic circuit system | |
| CN204140523U (en) | A kind of integrating electro-hydraulic actuator | |
| CN2588103Y (en) | Energy-saving self-locking hydraulic controlled one direction multi-way change valve | |
| CN106468062A (en) | There is the excavator soil-shifting hydraulic system of dozer float function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20200104 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |