CN105569111B - Excavator hydraulic system - Google Patents
Excavator hydraulic system Download PDFInfo
- Publication number
- CN105569111B CN105569111B CN201510952389.4A CN201510952389A CN105569111B CN 105569111 B CN105569111 B CN 105569111B CN 201510952389 A CN201510952389 A CN 201510952389A CN 105569111 B CN105569111 B CN 105569111B
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- joint
- main control
- excavator
- 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
Classifications
-
- 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
-
- 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic 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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to hydraulic crawler excavator, once there is power failure and the problem of may the influenceing construction that can not move to solve hydraulic crawler excavator；A kind of excavator hydraulic system is provided, itself high pressure fuel source, itself pilot control, itself fuel tank, pilot valves, main control valve, hydraulic actuator including excavator, oil sources selector valve is set up between main control valve and itself high pressure fuel source, and connection introduces the joint of external high pressure oil sources on oil sources selector valve, shuttle valve is set between pilot control and pilot valve and the joint for quoting external pilot oil sources is connect by shuttle valve, main control valve and itself fuel tank indirect stop valve and be connected the joint being connected with external fuel tank.There is the outside oil sources of access when power failure can not move in excavator to enable excavator to act mobile and leave job site, so as to avoid hindering the problem of machine can not move and influence construction for some reason.
Description
Technical field
The present invention relates to a kind of excavator, more specifically to a kind of hydraulic system of excavator.
Background technology
Excavator as engineering machinery king, applied to various operating modes.Existing excavator is mostly hydraulic crawler excavator, its by
Motor or Engine driven Hydraulic Pump, hydraulic pump drive hydraulic actuator such as hydraulic jack, hydraulic motor etc. and drive dig
The shift action of the walking of pick machine, the revolution of upper mechanism and swing arm, dipper and scraper bowl.If hydraulic crawler excavator is moved
Failure in terms of power, for example, drive the engine of hydraulic pump or motor breaks down or hydraulic pump breaks down and is unable to work
Make, then whole machine can be caused not act, machine can not be moved, upper mechanism can not be turned round, swing arm and dipper can not be moved.
If now machine is in narrow and small regional work, the occasion such as brickkiln, tunnel can not be overhauled because space is limited, and because digging
Pick machine runs out of steam, it is impossible to exit working space, or even other rescue outfits such as crane, trailer etc. can not be used to be rescued.
Therefore existing hydraulic crawler excavator, once occurring dynamically working in the inconvenient place of maintenance, will be a very troublesome thing,
Even understand therefore schedule delays and produce a large sum of compensation.
The content of the invention
The technical problem to be solved in the present invention is that once occur power failure for existing hydraulic crawler excavator and can not move
The problem of construction may being influenceed, and a kind of excavator hydraulic system that outside oil sources can be used to make machine act temporarily is provided.
The present invention is such for the technical scheme for realizing its purpose：A kind of excavator hydraulic system is provided, including excavated
Itself high pressure fuel source, itself pilot control, itself fuel tank, pilot valves, main control valve, the hydraulic actuator of machine, the guide
The control output end of valve group is connected with the hydraulic control end of the main control valve, the delivery outlet of the main control valve and the hydraulic actuator
Connection, the oil return opening of main control valve is connected by pipeline with itself fuel tank, it is characterised in that outside also including shuttle valve, for connecting
First joint of portion's pilot control, the second joint for connecting external high pressure oil sources, for connect external hydraulic fuel tank
Three joints, oil sources selector valve, stop valve, the oil inlet of the pilot valves are connected with the oil-out of the shuttle valve, the shuttle valve
Two oil inlets correspondence be connected with first joint and itself pilot control, itself high pressure fuel source, main control valve, second
Joint is connected with the oil sources selector valve, and the oil sources selector valve selects selection conducting itself high pressure fuel source and main control valve
Between oil circuit or the second joint of conducting and main control valve between oil circuit, the oil return opening of the main control valve and the 3rd joint
Stop valve is provided with connection and the pipeline between the oil return opening of the main control valve and itself fuel tank.In the present invention, if
During machine normal work, shuttle valve turns on itself pilot control of pilot valves and excavator, and oil sources selector valve is by excavator
Oil circuit conducting between itself high pressure fuel source and main control valve, the stop valve being connected between main control valve and hydraulic oil container, which is also at, leads
Lead to state, now excavator is worked under self power drive pattern., can be with if the dynamical system of excavator breaks down
Call the engineering mechanical device on the excavator periphery as rescue aid, the pilot control of the first joint and rescue aid is connected
Connect, the high pressure fuel source connection of the second joint and rescue aid, the fuel tank loop connection of the 3rd joint rescue aid, then by oil sources
Selection Vavle switching turns on the oil circuit between the second joint and main control valve, the oil between main control valve and excavator itself high pressure fuel source
Road is ended, and stop valve between main control valve oil return opening and itself fuel tank is in cut-off state, and shuttle valve is by the guide oil of rescue aid
The pilot valves conducting of source and excavator, now excavator can recover each hydraulic pressure under the hydraulic oil source driving of rescue aid and hold
The action of units, the movement of the revolution of walking, upper mechanism such as lower mechanisms, swing arm and equipment dipper, so that
Excavator leaves work-yard, into maintenance place or on to being sent to repair shop on trailer.High pressure fuel source refers on excavator
To the oil sources of the hydraulic actuator fuel feeding such as running motor, rotary motor, boom cylinder, bucket arm cylinder, bucket cylinder, these are high
The pressure in force feed source generally reaches 20 to 50 MPas of even more highs.The present invention sets outside oil sources joint on board a dredger, so that
Solve the problem of excavator influences construction because that can not be moved dynamical system failure.
Above-mentioned excavator hydraulic system, the oil sources selector valve includes two first switch valves and second switch in parallel
Valve, each correspondence connects the oil inlet of the first switch valve and second switch valve with second joint and itself high pressure fuel source
Connect, the oil-out of the first switch valve and second switch valve is connected with the oil inlet of the main control valve.First switch valve and
Two switch valves can be designed to linkage, and when first switch valve is turned on, second switch valve closes cut-off, when the conducting of second switch valve
When first switch valve close cut-off, therefore first switch valve and second switch valve can also be merged to form a valve.
Above-mentioned excavator hydraulic system, in addition to the shunting being arranged between second joint and the oil sources selector valve
Valve, the oil inlet of the flow divider is connected with second joint, and several oil-outs and the oil sources of the flow divider are selected
The corresponding oil inlet connection of valve, itself high pressure fuel source and the main control valve have identical with the flow divider oil-out number
Hydraulic fluid port and the connection of each hydraulic fluid port corresponding with oil sources selector valve hydraulic fluid port.Hydraulic crawler excavator is that a kind of hydraulic system is complicated
Machine, it includes a variety of hydraulic pressure such as lower running motor, rotary motor, boom cylinder, bucket arm cylinder, bucket cylinder and performs member
Main control valve on part, excavator is a banked direction control valves, and each executive component has corresponding oil circuit driving, control, mini-excavator
It is general to use three oil pump feeds.Medium-and-large-sized excavator then uses double pump fuel feeding., in order to which excavator is in the hydraulic oil of external rescue aid
With using the fuel feeding situation of itself high pressure fuel source closer during source, flow divider is set between the second joint and oil sources selector valve, will
The rescue aid high pressure fuel source entered from the second joint by flow divider is divided into multichannel, and the hydraulic oil for being divided into multichannel passes through oil sources again
Different oil ducts and hydraulic fluid port output enter corresponding control connection in main control valve on selector valve, and driving correspondence hydraulic actuator is moved
Make.
Above-mentioned excavator hydraulic system, first joint, the second joint, the 3rd joint can be ordinary couplings, but make
For superior technique scheme, one or more of which can be quick-release connector.Using quick-release connector, need to connect in excavator
It can be quickly accessed when entering outside oil sources, and quick-release connector can close the oil circuit of joint automatically when disengaging connection, can keep away
It is the leakage for causing hydraulic oil to exempt from joint connection and disengagement.
Compared with prior art, the present invention sets up oil sources selector valve between main control valve and itself high pressure fuel source, and in oil
Connection introduces the joint of external high pressure oil sources on the selector valve of source, sets shuttle valve between pilot control and pilot valve and is connect by shuttle valve
The joint of external pilot oil sources is quoted, in connecing that the indirect stop valve and being connected of main control valve and itself fuel tank is connected with external fuel tank
Head.Periphery rescue aid is borrowed when excavator can not move because of dynamical system failure, the hydraulic power of rescue aid is accessed
Behave excavator and leave job site, it is to avoid the influence construction of failure machine.
Brief description of the drawings
Fig. 1 is the schematic diagram of excavator hydraulic system of the present invention.
Parts title and sequence number in figure：
Main pump 1, pilot valves 2, main control valve 3, the first joint 4, the second joint 5, the 3rd joint 6, stop valve 7, oil sources choosing
Select valve 8, first switch valve 81, second switch valve 82, flow divider 9, itself fuel tank 10, shuttle valve 11.
Embodiment
Illustrate specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, excavator hydraulic system in the present embodiment include main pump 1, pilot valves 2, main control valve 3, itself
Fuel tank 10 and hydraulic actuator (not shown).Main control valve 3 is also to be made up of multi-joint reversing control valve, each executive component
Valve block corresponding with main control valve is connected, while there is the action of corresponding pilot control oil circuit control executive component..In order that
This excavator can use outside oil sources and act, in addition to shuttle valve 11, the first joint 4, the second joint 5, the 3rd joint 6, cut
Only valve 7, oil sources selector valve 8, flow divider 9.Wherein the first joint 4, the second joint 5, the 3rd joint 6 are quick-release connector.
Wherein main pump 1 includes P1 pumps, P2 pumps, P3 pumps, pioneer pump.Pioneer pump is used as itself pilot control of excavator, P1
Pump, P2 pumps, P3 pumps as excavator itself high pressure fuel source.The oil-out of pioneer pump is connected with an oil inlet of shuttle valve 11,
First joint 4 is used to connect external pilot oil sources, and the first joint 4 is connected with another oil inlet of shuttle valve 11, shuttle valve 11
Oil-out is connected with the oil inlet of pilot valves 2.
Oil sources selector valve 8 is made up of first switch valve 81 and second switch valve 82, first switch valve 81 and second switch valve
82 be two six-way valves, and when first switch valve 81 is on, its three oil inlets are led with corresponding three oil-outs
It is logical；When in cut-off position, the oil circuit cut-off between its three oil inlets and corresponding three oil-outs.Second switch valve 82 is same
Sample is also in this way, when it is on, its three oil inlets are turned on corresponding three oil-outs, when in cut-off position
When, the oil circuit cut-off between its three oil inlets and corresponding three oil-outs.Three oil inlets correspondence of first switch valve 81
Connected with the oil-out of the P1 pumps in main pump, P2 pumps, P3 pumps, three oil inlets correspondence and the flow divider 9 of second switch valve 82
Three oil-out connections, the oil inlet of flow divider 9 is connected with the second joint 5, and the second joint 5 is used to connect external high pressure oil sources,
The external high pressure oil sources introduced at second joint 5 is divided into three roads into oil sources selector valve by flow divider 9.First switch valve 81 and
Two switch valve 82 is in parallel, and their three oil-outs correspondence is connected with three road oil inlets of main control valve.Due to making for outside oil sources
Relatively low with frequency, it is contemplated that cost and reliability, first switch valve 81 and second switch valve 82 can select manual control, certainly
Hydraulic control or automatically controlled can be selected.In design, first switch valve 81 and second switch valve 82 can be arranged to linkage, i.e., first opens
Close second switch valve 82 when valve 81 is turned on to end, first switch valve 81 ends when second switch valve 82 is turned on, so as to realize oil sources
Selector valve 8 selects a selection and turns on the oil circuit between itself high pressure fuel source and main control valve 3 or turn on the second joint 5 and main control valve 3
Between oil circuit.
Stop valve 7 is arranged on pipe of the oil return opening of main control valve 3 (T1 mouthfuls and T2 mouthfuls) between itself fuel tank 10 of excavator
Lu Shang, the 3rd joint 6 is connected on the oil return opening of main control valve 3 (T1 mouthfuls), is connected for the fuel tank loop with external rescue equipment.
In the present embodiment, if excavator is normal, oil sources selector valve 8 turns on the oil circuit between main pump 1 and main control valve 3,
Oil circuit cut-off between flow divider 9 and main control valve 3；The guide oil of pioneer pump pumping in main pump 1 is from the PP mouths of main pump 1 through shuttle valve
The 11 P1 pumps delivered in pilot valves 2, the control main control valve 3 of pilot valves 2, main pump 1, P2 pumps, the hydraulic oil of P3 pumpings are respectively hung oneself
Cross main pump 1 P1 mouths, P2 mouthfuls, the A1 mouths of the oil-outs such as PG mouthfuls to oil sources selector valve 8, B1 mouthfuls, after C1 mouthfuls through oil sources selector valve 8
A2 mouths, B2 mouthfuls, C2 mouthfuls flow to main control valve P1 mouths, P2 mouthfuls, the oil inlets such as P3 mouthfuls.Each hydraulic pressure is driven to perform by main control valve 3
Element movement, the oil return of hydraulic actuator then returns to itself oil of excavator by T mouthfuls of the oil return of main control valve 3, stop valve 7
Case, now stop valve 7 is in the conduction state.
When dynamical system the failure such as engine failure or main pump failure of excavator is unable to pumps hydraulic and performed
During hydraulic oil needed for element, the hydraulic test on the excavator periphery can be now called to be selected as rescue aid, and by fluid
Select valve 8 to switch, turn on the oil circuit between flow divider 9 and main control valve 3, the first joint 4 then passes through the elder generation of pipeline and rescue aid
Oil Guide source is connected, and the second joint 5 is connected by the high pressure fuel source of pipeline and rescue aid, and the 3rd joint 6 passes through pipeline and rescue
The fuel tank loop connection of equipment, and close the stop valve 7 between main control valve 3 and itself fuel tank 10 on connecting line.Start rescue
After equipment, the guide oil in rescue aid enters pilot valves 2 by shuttle valve 11, and the high pressure fuel source of rescue aid is through the second joint
4th, oil return in each hydraulic actuator action that oil sources selector valve 8 enters on main control valve 3, driving excavator, hydraulic actuator
T mouthfuls of oil return and the 3rd joint 6 then by main control valve 3 flow back into the fuel tank of rescue aid, realizes the circulation of hydraulic oil.Come with this
The action and movement of excavator are realized, so as to leave job site under in rescue aid, applying for job site is not influenceed
Work.
Claims (4)
1. a kind of excavator hydraulic system, its itself high pressure fuel source for including excavator, itself pilot control, itself fuel tank, elder generation
Pilot valve group, main control valve, hydraulic actuator, the control output end of the pilot valves are connected with the hydraulic control end of the main control valve,
The delivery outlet of the main control valve is connected with the hydraulic actuator, and the oil return opening of main control valve passes through pipeline and itself fuel tank
Connection, it is characterised in that the first joint also including shuttle valve, for connecting external pilot oil sources, for connecting external high pressure oil sources
The second joint, the 3rd joint, oil sources selector valve, stop valve for connecting external hydraulic fuel tank, the pilot valves enter
Hydraulic fluid port is connected with the oil-out of the shuttle valve, two oil inlets correspondence and first joint and itself guide oil of the shuttle valve
Source is connected, and itself high pressure fuel source, main control valve, the second joint are connected with the oil sources selector valve, the oil sources selector valve
Select the oil circuit described in selection conducting between itself high pressure fuel source and main control valve or turn between the second joint and main control valve
Oil circuit, the oil return opening of the main control valve be connected with the 3rd joint and the main control valve oil return opening and itself fuel tank it
Between pipeline on be provided with stop valve.
2. excavator hydraulic system according to claim 1, it is characterised in that the oil sources selector valve includes two parallel connections
First switch valve and second switch valve, the respective correspondence and described second of the oil inlet of the first switch valve and second switch valve
Joint and itself high pressure fuel source are connected, the oil-out of the first switch valve and second switch valve and the oil inlet of the main control valve
Connection.
3. excavator hydraulic system according to claim 1 or 2, it is characterised in that also including being arranged on second joint
With the flow divider between the oil sources selector valve, the oil inlet of the flow divider is connected with second joint, the flow divider
Several oil-outs and the oil sources selector valve corresponding oil inlet connect, itself high pressure fuel source and the main control valve have
With the same number of hydraulic fluid port of flow divider oil-out and the hydraulic fluid port connection corresponding with the oil sources selector valve of each hydraulic fluid port.
4. excavator hydraulic system according to claim 1, it is characterised in that first joint, the second joint, the 3rd
Joint is quick-release connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510952389.4A CN105569111B (en) | 2015-12-18 | 2015-12-18 | Excavator hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510952389.4A CN105569111B (en) | 2015-12-18 | 2015-12-18 | Excavator hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105569111A CN105569111A (en) | 2016-05-11 |
| CN105569111B true CN105569111B (en) | 2017-09-26 |
Family
ID=55879689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510952389.4A Active CN105569111B (en) | 2015-12-18 | 2015-12-18 | Excavator hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105569111B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177095A (en) * | 2020-11-02 | 2021-01-05 | 山东临工工程机械有限公司 | Hydraulic energy supply system and excavator |
| CN112962710B (en) * | 2021-02-20 | 2023-02-03 | 三一重机有限公司 | Hydraulic system of excavator, excavator and power sharing machine group |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060074254A (en) * | 2004-12-27 | 2006-07-03 | 현대중공업 주식회사 | Engine rpm & pump control system for excavator |
| JP2010190368A (en) * | 2009-02-19 | 2010-09-02 | Hitachi Constr Mach Co Ltd | Hydraulic control device of construction machine |
| CN102733442B (en) * | 2011-04-02 | 2015-07-22 | 柳工常州机械有限公司 | Gyration energy recycling system of hydraulic excavator |
| CN103742474A (en) * | 2014-01-07 | 2014-04-23 | 中联重科股份有限公司 | Tower crane, tower crane winch system and hydraulic station |
-
2015
- 2015-12-18 CN CN201510952389.4A patent/CN105569111B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105569111A (en) | 2016-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104220763B (en) | The hydraulic circuit and its control device of construction machinery | |
| US7500360B2 (en) | Hydraulic driving system of construction machinery | |
| JP2010013927A (en) | Hydraulic drive system for excavator | |
| JP5669448B2 (en) | Hydraulic drive system for excavator | |
| CN104246234B (en) | The hydraulic circuit of construction machinery | |
| US7721538B2 (en) | Hydraulic circuit for construction machine | |
| CN105492779B (en) | The multi-joint reversal valve of building machinery | |
| US9523184B2 (en) | Hybrid excavator having a system for reducing actuator shock | |
| CN109844230A (en) | Engineering machinery | |
| CN105569111B (en) | Excavator hydraulic system | |
| CN104454737B (en) | Sheet multiway valve hydraulic system used for mini excavator | |
| CN105612359A (en) | Hydraulic drive unit | |
| CN113700689A (en) | Excavator and hydraulic control system thereof | |
| CN102828536B (en) | Excavator convergent flow control system and excavator | |
| CN104822950B (en) | The hydraulic circuit of engineering machinery | |
| KR20080051212A (en) | Hydraulic system for small-sized excavator to improve bucket speed | |
| KR100656046B1 (en) | Apparatus for controlling arm speed in a miniature excavator | |
| CN207092166U (en) | A kind of hydraulic crawler excavator logical valve | |
| CN107630484A (en) | A kind of hydraulic crawler excavator logical valve | |
| CN204828113U (en) | Valve module, including hydraulic system and machine of this valve module | |
| CN212838660U (en) | Multi-way control valve | |
| JP2012067509A (en) | Hydraulic working machine and method of increasing output | |
| JP2005068718A (en) | Hydraulic drive unit of construction machinery | |
| JP6860400B2 (en) | Hydraulic control device for construction machinery | |
| KR101500745B1 (en) | Control circuit for selecting option operation of construction 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 |