CN108909832A - steering hydraulic system and loading machine - Google Patents
steering hydraulic system and loading machine Download PDFInfo
- Publication number
- CN108909832A CN108909832A CN201810926421.5A CN201810926421A CN108909832A CN 108909832 A CN108909832 A CN 108909832A CN 201810926421 A CN201810926421 A CN 201810926421A CN 108909832 A CN108909832 A CN 108909832A
- Authority
- CN
- China
- Prior art keywords
- steering
- valve
- fluid port
- hydraulic fluid
- diverter
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/065—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
Abstract
The present invention relates to steering hydraulic system and loading machines, to solve the problems, such as that existing loading machine steering circle number easily causes operation fatigue more；A kind of steering hydraulic system, including steering cylinder, flux amplification valve, diverter, steering wheel assembly, controller, steering tiller, electric proportional control valve, switching valve are provided；The steering electric signal control electric proportional control valve that controller is exported according to steering tiller exports corresponding steering pilot pressure signal, the course changing control end connection for turning to pilot pressure signal output end and flow control valve for turning to pilot pressure signal output end and diverter of electric proportional control valve.In the present invention, operator carries out outside normal steering operation except through steering wheel rotation, when loading machine is when fixed field domain frequently turns to, steering operation can also be carried out by operation steering tiller, it is turned to by steering tiller, labor intensity is low, is suitble to frequent steering operation.
Description
Technical field
The present invention relates to a kind of course changing controls, more specifically to a kind of steering hydraulic system and loading machine.
Background technique
For existing Work machine, such as loading machine, fork truck etc., it is mechanically configured with steering hydraulic system this kind of,
The steering hydraulic system includes the diverter of direction dish driving, with diverter connect flux amplification valve, is controlled by flux amplification valve
Steering cylinder etc..In this kind of steering system, operator realizes course changing control by steering wheel rotation.But for some works
Industry machinery is in fixed area operation, such as loading machine, when mining site loads and unloads material, running track is substantially fixed, loading machine
Steering operation is also substantially fixed.In order to improve the operating efficiency of machine, usually require that loading machine realizes fast steering, this will
Operator's quick rotation steering wheel is sought, but since loading machine wheel steering circle number is more, operator needs to rotate frequently direction
Disk, arm fatiguability, labor intensity are larger.
Summary of the invention
The technical problem to be solved by the present invention is to easily cause asking for operation fatigue for existing loading machine steering circle number more
Topic, and provide and a kind of fast steering and the low steering hydraulic system and loading machine of labor intensity may be implemented.
The present invention is to realize that the technical solution of its purpose is such：A kind of steering hydraulic system, including steering oil are provided
Cylinder, the flux amplification valve being connected on steering cylinder driving oil circuit, diverter, the steering wheel assembly for driving diverter, to steering
Device and flux amplification valve provide the steering pressure oil sources of pressure oil, it is characterised in that further include controller, connected to the controller
Steering tiller, control terminal electric proportional control valve connected to the controller, switching valve；
Left steering and right turn electric signal are exported to the controller when steering tiller swings；
The controller exports course changing control to the electric proportional control valve according to the steering electric signal that steering tiller exports
Electric signal makes the A hydraulic fluid port of electric proportional control valve or B hydraulic fluid port export left steering pilot pressure oil and right turn pilot pressure oil；
The oil inlet end of the electric proportional control valve is connect with steering pressure oil sources, the A hydraulic fluid port and B of the electric proportional control valve
Hydraulic fluid port, the L hydraulic fluid port of diverter and R hydraulic fluid port, the left steering control terminal of flux amplification valve and right turn control terminal with the switching
Valve connection, the left steering control terminal and right turn control terminal of the flux amplification valve receive electric proportional control by switching valve correspondence
The steering pilot pressure oil of L hydraulic fluid port and R the hydraulic fluid port output of the pilot pressure oil or diverter of A hydraulic fluid port and B the hydraulic fluid port output of valve.?
In the present invention, operator carries out outside normal steering operation except through steering wheel rotation, when loading machine is frequent in fixed field domain
When steering, steering operation can also be carried out by operation steering tiller, be turned to by steering tiller, labor intensity is low, is suitble to
Frequent steering operation.
It further, further include being connect with controller for detecting whether diverter has in above-mentioned steering hydraulic system
The diverter steering operation detection device of steering operation, when controller receives the detection of diverter steering operation detection device transmission
Signal simultaneously judges to stop exporting course changing control electric signal to electric proportional control valve when diverter has steering operation.Turned by setting
Wheel steering operator precedence is established to device steering operation detection device.
Further, in above-mentioned steering hydraulic system, the switching valve includes left steering shuttle valve and right turn shuttle valve；It is described
The left steering control terminal of flux amplification valve is connect with left steering shuttle valve oil outlet, the right turn control terminal of the flux amplification valve with
The oil outlet of right turn shuttle valve connects, and the L hydraulic fluid port of the diverter is connect with an oil inlet end of left steering shuttle valve, the steering
The R hydraulic fluid port of device is connect with an oil inlet end of right turn shuttle valve；The A hydraulic fluid port of the electric proportional control valve is another with left steering shuttle valve
One oil inlet end connection, the B hydraulic fluid port of the electric proportional control valve are connect with another oil inlet end of right turn shuttle valve.
Further, in above-mentioned steering hydraulic system, the switching valve can also be two control terminals and the controller
The two-position three way magnetic valve of connection, wherein two oil inlets of two-position three way magnetic valve described in one respectively with electric proportional control valve
A hydraulic fluid port and the diverter L hydraulic fluid port, the left steering control of the oil outlet and flux amplification valve of the two-position three way magnetic valve
End processed；Two oil inlets of two-position three way magnetic valve described in another respectively with the B hydraulic fluid port of electric proportional control valve and the steering
The R hydraulic fluid port of device, the oil outlet of the two-position three way magnetic valve and the right turn control terminal of flux amplification valve；When the steering hand
Handle output turns to electric signal and diverter does not have controller output control signal when steering operation to control the two-position three way
Solenoid valve is by the A hydraulic fluid port of electric proportional control valve and B hydraulic fluid port in the left steering control terminal and right turn control terminal pair of flux amplification valve
It should connect, otherwise the controller output control signal controls L hydraulic fluid port and R hydraulic fluid port of the two-position three way magnetic valve by diverter
It is correspondingly connected with the left steering control terminal and right turn control terminal of flux amplification valve.
Further, in above-mentioned steering hydraulic system, it is described to device steering operation detection device be for detection direction disk
The rotation sensor whether component rotates.Steering wheel assembly includes steering wheel and the shaft for connecting steering wheel and diverter, rotation
Whether sensor is rotated for shaft in detection direction disk component, and when the spindle is rotated, rotation sensor is exported to controller
Signal is detected, controller is to judge that diverter has steering operation.
Further, in above-mentioned steering hydraulic system, diverter steering operation detection device be can also be for detecting
The L hydraulic fluid port of diverter and the pressure sensor of R hydraulic fluid port are stated, when controller detects the diverter by the pressure sensor
L hydraulic fluid port or R hydraulic fluid port pressure be greater than preset value when then determine diverter have steering operation.
Further, in above-mentioned steering hydraulic system, the steering pressure oil sources is variable pump, the diverter LS hydraulic fluid port
Connect with the variable pump load feedback mouth with flux amplification valve LS hydraulic fluid port, it is described can be with to device steering operation detection device
The pressure sensor for detecting the diverter LS hydraulic fluid port, when controller detected by the pressure sensor it is described
The pressure of diverter LS hydraulic fluid port then determines that diverter has steering operation when being greater than preset value.
It further, further include being connected to the diverter LS hydraulic fluid port and the variable pump in above-mentioned steering hydraulic system
Load feedback mouth connects the LS control valve on oil circuit, the spring cavity of the LS hydraulic fluid port of the electric proportional control valve and the LS signal valve
Connection.
The present invention is to realize that the technical solution of its purpose is such：A kind of loading machine is provided, which has aforementioned
Steering hydraulic system.
Compared with prior art, the present invention in the present invention, operator is normally turned except through steering wheel rotation
To outside operation, in due course, steering operation can also be carried out by operation steering tiller, to reduce frequent steering operation
Labor intensity.
Detailed description of the invention
Fig. 1 is the schematic diagram of steering hydraulic system of the present invention.
Fig. 2 is another schematic diagram of steering hydraulic system of the present invention.
Parts title and serial number in figure：
Variable pump 1, steering tiller 2, controller 3, electric proportional control valve 4, steering wheel 5, diverter 6, left steering shuttle valve 71,
Right turn shuttle valve 72, flux amplification valve 8, steering cylinder 9, pressure sensor 10, LS control valve 11, fuel tank 12.
Specific embodiment
Illustrate specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, the steering hydraulic system in the present embodiment is the steering hydraulic system of loading machine comprising variable pump
1, the components such as electric proportional control valve 4, flux amplification valve 8, steering cylinder 9, fuel tank 12.Fuel tank 12 is used for saving hydraulic system
Hydraulic oil；The draw oil from hydraulic oil container 12 of variable pump 1, pumps out from its oil outlet, the load feedback mouth on variable pump 1
X obtains load signal, and variable pump 1 pumps the hydraulic oil of appropriate flow according to load signal.
Flux amplification valve 8 is used to control the flexible of steering cylinder 9, realizes and turns to.Flux amplification valve 8 has and variable pump 1
Oil outlet connection oil inlet HP；With left actuator port CL and right actuator port CR, left actuator port CL and right working oil
Mouth CR is connect with the big chamber of steering cylinder 9 and small chamber respectively.Also there is interflow delivery outlet EF, for that will turn on flux amplification valve 8
To hydraulic system surplus hydraulic system of working fuel feeding from hydraulic fluid flow rate to loading machine.The oil return opening HT of flux amplification valve 8 with
The connection of fuel tank circuit；Oil sources delivery outlet P on flux amplification valve 8 can export the hydraulic oil of certain flow, can be used as electric ratio control
Valve 4 processed controls the pilot oil source of flux amplification valve 8；Also there is left steering control terminal L and right turn control terminal on flux amplification valve 8
Two pilot control ends R, for receiving the pilot control oil signal of electric proportional control valve 4 or diverter 6, to realize that flow is put
Big valve 8 controls the movement of steering cylinder 9；The LS hydraulic fluid port of flux amplification valve 8 is load feedback hydraulic fluid port, the LS hydraulic fluid port and variable pump 1
The X connection of load feedback mouth, meanwhile, the load feedback hydraulic fluid port LS hydraulic fluid port of diverter 6 is through LS control valve 11 and flux amplification valve 8
The connection of LS hydraulic fluid port, when use direction disk turns to, LS hydraulic fluid port, the LS hydraulic fluid port of flux amplification valve and the load of variable pump of diverter
Feedback port X connection, transmits load signal.
Electric proportional control valve 4 has P mouthfuls of oil sources access, load feedback LS hydraulic fluid port, T mouthfuls of oil return and control port, electric ratio
The oil sources of example control valve 4 accesses P mouthfuls and connect with the oil sources delivery outlet P of flux amplification valve 8, obtains required for electric proportional control valve 4
Pressure oil-source；The LS hydraulic fluid port of electric proportional control valve 4 is connect with the spring cavity of LS control valve 11 realizes that the load to variable pump 1 is anti-
It presents mouth X and transmits load signal.The control port of electric proportional control valve 4 divides A hydraulic fluid port and B hydraulic fluid port, be respectively used to output left steering and
The steering pilot pressure signal of right turn；T mouthfuls of oil return of electric proportional control valve 4 are connect with the oil return access port T of flow variable valve 8
The oil return circuit in flux amplification valve 8 is entered, through the counterbalance valve in flux amplification valve 8 from the oil return opening HT of flux amplification valve 8
Access fuel tank circuit.
Left steering is exported to controller 3 when steering tiller 2 swings and right turn electric signal, steering wheel 5 pass through shaft
Diverter 6 is driven, the output of diverter 6 is made to turn to pilot pressure signal.Pressure sensor 10 is mounted on the outlet of LS control valve 11
End, when steering wheel 5 rotates, the LS hydraulic fluid port of diverter 6 generates pressure signal, and pressure sensor 10 is converted into electric signal and passes
It is handed to controller 3, the pressure that controller is detected according to pressure sensor is compared with preset value, when pressure sensor 10 is examined
When the pressure measured is greater than preset value, then decision person's steering wheel rotation makes diverter have go to action.
The spool of electric proportional control valve 4 and diverter 6 belongs to out neutral valve core, when not doing any movement, the L of diverter
Hydraulic fluid port and R hydraulic fluid port and T mouthfuls of conductings, the A hydraulic fluid port and B hydraulic fluid port of electric proportional control valve and T mouthfuls of conductings.
The A hydraulic fluid port and B hydraulic fluid port of electric proportional control valve, the L hydraulic fluid port of diverter and R hydraulic fluid port pass through switching valve and flux amplification valve
Left steering control terminal L connected with right turn control terminal R, in the present embodiment, switching valve is made of two shuttle valves, is left respectively
Turn to shuttle valve 71 and right turn shuttle valve 72.The left steering control terminal L of flux amplification valve 8 is connect with 71 oil outlet of left steering shuttle valve,
The right turn control terminal R of flux amplification valve 8 is connect with the oil outlet of right turn shuttle valve 72, the L hydraulic fluid port and left steering shuttle of diverter
One oil inlet end of valve 71 connects, and the R hydraulic fluid port of diverter 6 is connect with an oil inlet end of right turn shuttle valve 72；Electric proportional control
The A hydraulic fluid port of valve 4 is connect with another oil inlet end of left steering shuttle valve 71, the B hydraulic fluid port and right turn shuttle valve 72 of electric proportional control valve 4
Another oil inlet end connection.When diverter carries out steering operation, the L hydraulic fluid port of diverter 6 and the pilot pressure oil of R hydraulic fluid port
Not Tong Guo left steering shuttle valve 71 and right turn shuttle valve 72 be transferred to the left steering control terminal L and right turn control terminal of flux amplification valve
R.When carrying out steering operation using steering tiller 2, the A hydraulic fluid port of electric proportional control valve 4 and the pilot pressure oil of B hydraulic fluid port are led to respectively
It crosses left steering shuttle valve and right turn shuttle valve is transferred to the left steering control terminal and right turn control terminal of flux amplification valve.
The course of work of loading machine steering hydraulic system in the present embodiment is as follows：
1, when steering tiller 2 swings (steering wheel does not rotate) to the left, steering tiller 2 is turned left to the transmission of controller 3
Electric signal, controller 3 export left-hand rotation electric signal to electric proportional control valve 4, and the proportional valve spool of electric proportional control valve 4 moves up, electric ratio
The P mouth of example control valve 4 is connected to by proportional valve spool 41 with the A hydraulic fluid port of electric proportional control valve 4, LS hydraulic fluid port, electric proportional control valve 4
One road binders is flowed out via A hydraulic fluid port, and the left steering control terminal of flux amplification valve 8 is entered by left steering shuttle valve 7, controls Flow amplification
Valve main valve plug works in left position, and hydraulic oil is made to respectively enter the size of steering cylinder 9 from the left actuator port CL of flux amplification valve 8
Chamber, another road binders of electric proportional control valve 4 flow out from the LS hydraulic fluid port of electric proportional control valve 4 by proportional valve spool 41, act on LS
Spring cavity one end of control valve 11, the oil inlet end of LS control valve 11 and the LS hydraulic fluid port of flux amplification valve 8, the load of variable pump 1 are anti-
Mouth X connection is presented, realizes that electric proportional control valve 4 and the LS pressure of flux amplification valve 8 match, and feed back to the load of variable pump 1
Feedback port X, variable pump 1 are supplied to the corresponding hydraulic oil of system.
2, when steering tiller swings to the right (steering wheel does not rotate), steering tiller 2 sends right-handed electricity to controller 3
Signal, controller 3 export right-hand rotation electric signal to electric proportional control valve 4, and the proportional valve spool of electric proportional control valve 4 moves down, electric ratio
The P mouth of control valve 4 is connected to by proportional valve spool 41 with the B hydraulic fluid port of electric proportional control valve 4, LS hydraulic fluid port, and the one of electric proportional control valve 4
Road binders is flowed out via B hydraulic fluid port, and the right turn control terminal of flux amplification valve 8 is entered by right turn shuttle valve 72, controls Flow amplification
Valve main valve plug works in right position, and hydraulic oil is made to respectively enter the size of steering cylinder 9 from the right actuator port CR of flux amplification valve 8
Chamber, another road binders of electric proportional control valve 4 flow out from the LS hydraulic fluid port of electric proportional control valve 4 by proportional valve spool 41, act on LS
Spring cavity one end of control valve 11, the oil inlet end of LS control valve 11 and the LS hydraulic fluid port of flux amplification valve 8, the load of variable pump 1 are anti-
Mouth X connection is presented, realizes that electric proportional control valve 4 and the LS pressure of flux amplification valve 8 match, and feed back to hydraulic variable displacement pump 1
Load feedback mouth X, variable pump 1 are supplied to the corresponding pump oil of system.
3, when steering tiller 2 and steering wheel 5 move at the same time, pressure sensor 10 detects the rotation when institute of steering wheel 5
The pressure signal of generation is then converted into electric signal and is output to controller 3, and controller cuts off the electricity of the output to electric proportional control valve
Stream, the proportional valve spool 41 of electric proportional control valve 4 are in power failure state, and spool is in middle position.The operation control of steering tiller 4 does not act as
With.The LS hydraulic fluid port no pressure signal of electric proportional control valve 4 exports, and the hydraulic oil of the LS hydraulic fluid port of flux amplification valve 8 overcomes LS control
The spring force of valve is connected to the LS signal of diverter 6 with the load feedback mouth X of variable pump 1, transmits load signal, controls high pressure
Oil enters the left steering control terminal of flux amplification valve by diverter 6 and right turn control terminal realizes that control turns to.
In the present embodiment, it is also possible to use two pressure sensors as diverter steering operation detection device, this
Two pressure sensors are separately mounted to the L hydraulic fluid port and R hydraulic fluid port of diverter, for detecting whether diverter has steering pilot pressure
Oil output is controlled when any one of two pressure sensors detect the output of the steerings pilot pressure oil greater than preset value
Device processed is then determined as that diverter carries out steering operation, and controller is cut off to the defeated of the control electric signal of electric proportional control valve at this time
Out, the control of wheel steering operator precedence is realized.Diverter steering operation detection device can also be that is used for a detection direction
The rotation sensor whether disk component rotates.Steering wheel assembly includes steering wheel and the shaft for connecting steering wheel and diverter, rotation
Turn sensor whether is rotated for shaft in detection direction disk component, when the spindle is rotated, rotation sensor is defeated to controller
Signal is detected out, and controller is to judge that diverter has steering operation.
In the present embodiment, switching valve can also be two control terminals two-position three way magnetic valve 73 connected to the controller,
As shown in Fig. 2, wherein two oil inlets of a union II position-3-way solenoid valve respectively with the A hydraulic fluid port of electric proportional control valve and described turn
To the L hydraulic fluid port of device, the oil outlet of the two-position three way magnetic valve and the left steering control terminal of flux amplification valve；Described in another
Two oil inlets of two-position three way magnetic valve R hydraulic fluid port with the B hydraulic fluid port of electric proportional control valve and the diverter respectively, this is described
The oil outlet of two-position three way magnetic valve and the right turn control terminal of flux amplification valve；Electric signal is turned to when the steering tiller exports
And diverter does not have controller output control signal when steering operation to control the two-position three way magnetic valve for electric ratio control
The A hydraulic fluid port and B hydraulic fluid port of valve processed and the left steering control terminal and right turn control terminal of flux amplification valve are correspondingly connected with, the otherwise control
Device output control signal processed controls the two-position three way magnetic valve for a left side for the L hydraulic fluid port of diverter and R hydraulic fluid port and flux amplification valve
Course changing control end and right turn control terminal are correspondingly connected with.
Claims (9)
1. a kind of steering hydraulic system including steering cylinder, the flux amplification valve being connected on steering cylinder driving oil circuit, turns to
Device, the steering wheel assembly for driving diverter provide the steering pressure oil sources of pressure oil, feature to diverter and flux amplification valve
It is to further include controller, steering tiller connected to the controller, control terminal electric proportional control valve connected to the controller, switching
Valve；
Left steering and right turn electric signal are exported to the controller when steering tiller swings；
The controller exports course changing control telecommunications to the electric proportional control valve according to the steering electric signal that steering tiller exports
Number make the A hydraulic fluid port or B hydraulic fluid port output left steering pilot pressure oil and right turn pilot pressure oil of electric proportional control valve；
The oil inlet end of the electric proportional control valve is connect with steering pressure oil sources, A hydraulic fluid port and the B oil of the electric proportional control valve
Mouthful, the L hydraulic fluid port of diverter and R hydraulic fluid port, the left steering control terminal of flux amplification valve and right turn control terminal with the switching valve
Connection, the left steering control terminal and right turn control terminal of the flux amplification valve receive electric proportional control valve by switching valve correspondence
A hydraulic fluid port and B hydraulic fluid port output pilot pressure oil or diverter L hydraulic fluid port and R hydraulic fluid port output steering pilot pressure oil.
2. steering hydraulic system according to claim 1, it is characterised in that further include connecting to turn for detecting with controller
Whether there is the diverter steering operation detection device of steering operation to device, when controller receives diverter steering operation detection dress
It sets the detection signal of transmission and judges to stop exporting course changing control telecommunications to electric proportional control valve when diverter has steering operation
Number.
3. steering hydraulic system according to claim 1 or 2, it is characterised in that the switching valve include left steering shuttle valve and
Right turn shuttle valve；The left steering control terminal of the flux amplification valve is connect with left steering shuttle valve oil outlet, the flux amplification valve
Right turn control terminal connect with the oil outlet of right turn shuttle valve, one of the L hydraulic fluid port of the diverter and left steering shuttle valve into
Oily end connection, the R hydraulic fluid port of the diverter are connect with an oil inlet end of right turn shuttle valve；The A oil of the electric proportional control valve
Mouthful connect with another oil inlet end of left steering shuttle valve, the B hydraulic fluid port of the electric proportional control valve and right turn shuttle valve another
Oil inlet end connection.
4. steering hydraulic system according to claim 2, it is characterised in that the switching valve be two control terminals with it is described
Controller connection two-position three way magnetic valve, wherein two oil inlets of two-position three way magnetic valve described in one respectively with electric ratio
The A hydraulic fluid port of control valve and the L hydraulic fluid port of the diverter, the oil outlet of the two-position three way magnetic valve and a left side for flux amplification valve
Course changing control end；Two oil inlets of two-position three way magnetic valve described in another respectively with the B hydraulic fluid port of electric proportional control valve and institute
State the R hydraulic fluid port of diverter, the oil outlet of the two-position three way magnetic valve and the right turn control terminal of flux amplification valve；When described
Steering tiller output turns to electric signal and diverter does not have controller output control signal when steering operation to control described two
Position-3-way solenoid valve is by the A hydraulic fluid port of electric proportional control valve and B hydraulic fluid port in the left steering control terminal and right turn control of flux amplification valve
End processed is correspondingly connected with, and otherwise the controller output control signal controls L hydraulic fluid port of the two-position three way magnetic valve by diverter
Left steering control terminal and right turn control terminal with R hydraulic fluid port in flux amplification valve are correspondingly connected with.
5. steering hydraulic system according to claim 2, it is characterised in that it is described to device steering operation detection device be use
In the rotation sensor whether detection direction disk component rotates.
6. steering hydraulic system according to claim 2, it is characterised in that diverter steering operation detection device is to be used for
Detect the L hydraulic fluid port of the diverter and the pressure sensor of R hydraulic fluid port, when controller detected by the pressure sensor it is described
The L hydraulic fluid port of diverter or the pressure of R hydraulic fluid port then determine that diverter has steering operation when being greater than preset value.
7. steering hydraulic system according to claim 2, it is characterised in that the steering pressure oil sources is variable pump, described
Diverter LS hydraulic fluid port and flux amplification valve LS hydraulic fluid port are connect with the variable pump load feedback mouth, described to examine to device steering operation
Surveying device is the pressure sensor for detecting the diverter LS hydraulic fluid port, when controller is detected by the pressure sensor
The pressure of the diverter LS hydraulic fluid port then determines that diverter has steering operation when being greater than preset value.
8. steering hydraulic system according to claim 7, it is characterised in that further include being connected to the diverter LS hydraulic fluid port
The LS control valve on oil circuit is connect with the variable pump load feedback mouth, the LS hydraulic fluid port and the LS of the electric proportional control valve are controlled
The spring cavity of valve processed connects.
9. a kind of loading machine, it is characterised in that the loading machine has steering hydraulic system described in any item of the claim 1 to 8
System.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810926421.5A CN108909832B (en) | 2018-08-15 | 2018-08-15 | Steering hydraulic system and loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810926421.5A CN108909832B (en) | 2018-08-15 | 2018-08-15 | Steering hydraulic system and loader |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108909832A true CN108909832A (en) | 2018-11-30 |
| CN108909832B CN108909832B (en) | 2021-11-09 |
Family
ID=64404783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810926421.5A Active CN108909832B (en) | 2018-08-15 | 2018-08-15 | Steering hydraulic system and loader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108909832B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112590922A (en) * | 2020-12-09 | 2021-04-02 | 中冶宝钢技术服务有限公司 | Steering control device and control method for vehicle and vehicle |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1688473A (en) * | 2002-09-13 | 2005-10-26 | 沃尔沃建造设备控股（瑞典）有限公司 | Method, device and computer program product for controlling the steering of a vehicle |
| CN101774398A (en) * | 2010-02-09 | 2010-07-14 | 北京农业信息技术研究中心 | Manual priority tractor self-steering method and device |
| CN201592732U (en) * | 2010-02-09 | 2010-09-29 | 北京农业信息技术研究中心 | Automatically steering device of tractor preferring manual operation |
| US20140216580A1 (en) * | 2013-02-01 | 2014-08-07 | Danfoss Power Solutions Aps | Hydraulic steering and method for detecting a valve position |
| CN104144843A (en) * | 2011-09-30 | 2014-11-12 | 伊顿公司 | Steering control unit and electro-hydraulic steering load sense control |
| CN104295551A (en) * | 2014-08-18 | 2015-01-21 | 中国农业大学 | Self-steering proportional control valve block and navigation hydraulic system based on self-steering proportional control valve block |
| US20150259884A1 (en) * | 2012-03-29 | 2015-09-17 | Komatsu Ltd. | Steering device for wheel loader |
| CN105848989A (en) * | 2013-12-27 | 2016-08-10 | 日立建机株式会社 | Hydraulic driving system |
| CN106480927A (en) * | 2016-11-02 | 2017-03-08 | 广西柳工机械股份有限公司 | Determine varying load sensitivity combining hydraulic system and loader |
| CN106697044A (en) * | 2016-11-16 | 2017-05-24 | 广西柳工机械股份有限公司 | Steering hydraulic system and loading machine |
| JP2017226492A (en) * | 2016-06-20 | 2017-12-28 | 川崎重工業株式会社 | Hydraulic drive system |
-
2018
- 2018-08-15 CN CN201810926421.5A patent/CN108909832B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1688473A (en) * | 2002-09-13 | 2005-10-26 | 沃尔沃建造设备控股（瑞典）有限公司 | Method, device and computer program product for controlling the steering of a vehicle |
| CN101774398A (en) * | 2010-02-09 | 2010-07-14 | 北京农业信息技术研究中心 | Manual priority tractor self-steering method and device |
| CN201592732U (en) * | 2010-02-09 | 2010-09-29 | 北京农业信息技术研究中心 | Automatically steering device of tractor preferring manual operation |
| CN104144843A (en) * | 2011-09-30 | 2014-11-12 | 伊顿公司 | Steering control unit and electro-hydraulic steering load sense control |
| US20150259884A1 (en) * | 2012-03-29 | 2015-09-17 | Komatsu Ltd. | Steering device for wheel loader |
| US20140216580A1 (en) * | 2013-02-01 | 2014-08-07 | Danfoss Power Solutions Aps | Hydraulic steering and method for detecting a valve position |
| CN105848989A (en) * | 2013-12-27 | 2016-08-10 | 日立建机株式会社 | Hydraulic driving system |
| CN104295551A (en) * | 2014-08-18 | 2015-01-21 | 中国农业大学 | Self-steering proportional control valve block and navigation hydraulic system based on self-steering proportional control valve block |
| JP2017226492A (en) * | 2016-06-20 | 2017-12-28 | 川崎重工業株式会社 | Hydraulic drive system |
| CN106480927A (en) * | 2016-11-02 | 2017-03-08 | 广西柳工机械股份有限公司 | Determine varying load sensitivity combining hydraulic system and loader |
| CN106697044A (en) * | 2016-11-16 | 2017-05-24 | 广西柳工机械股份有限公司 | Steering hydraulic system and loading machine |
Non-Patent Citations (2)
| Title |
|---|
| 叶建文: "《电液比例控制阀在工程机械中的应用研究》", 《机电产品开发与创新》 * |
| 邢克鹏: "《大型拖拉机全液压自动转向系统设计》", 《农业装备与车辆工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112590922A (en) * | 2020-12-09 | 2021-04-02 | 中冶宝钢技术服务有限公司 | Steering control device and control method for vehicle and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108909832B (en) | 2021-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104884818B (en) | The proportional flow control of fluid pump assemblies | |
| CN103597218B (en) | For the hydraulic system of engineering machinery | |
| US8806860B2 (en) | Hybrid construction machine | |
| US9328757B2 (en) | Hydraulic system for work machine | |
| US9995018B2 (en) | Control system of hybrid construction machine | |
| JP2002512922A (en) | Hydraulic steering system for vehicles, especially for mobile work machines | |
| CN105605014B (en) | Hydraulic control system of extractor accessory | |
| CN106895039B (en) | Electric proportional control valve and hydraulic system of loading machine working device | |
| KR101680902B1 (en) | Steering load sensing system for a heavy equipment | |
| US20160312443A1 (en) | Control system of hybrid construction machine | |
| CN201526546U (en) | Hydraulic control system of underground anti-explosion hoister adopting multi-pump combination technique | |
| CN102616705B (en) | Energy-saving forklift hydraulic system with energy recovery function | |
| CN103950870A (en) | Forklift hydraulic system with energy recovery and double-pump oil supply functions | |
| CN102030265B (en) | Crane hydraulic system for load sensitive ship | |
| CN108909832A (en) | steering hydraulic system and loading machine | |
| CN104595273B (en) | Engineering machinery refinement hydraulic system | |
| CN108909831A (en) | steering hydraulic system and loading machine | |
| CN108517918B (en) | Automatic speed change control system and control method for steering of crawler excavator | |
| CN106697044A (en) | Steering hydraulic system and loading machine | |
| CN203890013U (en) | Double-pump oil supply and energy recovery type forklift hydraulic system | |
| KR102385608B1 (en) | Control valves for shovels and shovels | |
| JP2001041165A (en) | Hydraulic system for industrial vehicle | |
| CN107630871A (en) | Hydraulic system | |
| CN103114624A (en) | Load-sensitive operation system of loading machine | |
| JP2010112493A (en) | Control device for working machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |