CN106351898A - Land leveler front wheel driving hydraulic system - Google Patents
Land leveler front wheel driving hydraulic system Download PDFInfo
- Publication number
- CN106351898A CN106351898A CN201610920339.2A CN201610920339A CN106351898A CN 106351898 A CN106351898 A CN 106351898A CN 201610920339 A CN201610920339 A CN 201610920339A CN 106351898 A CN106351898 A CN 106351898A
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- China
- Prior art keywords
- mouth
- valve
- control valve
- front wheel
- hydraulic
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention relates to a land leveler front wheel driving hydraulic system. In order to solve the problem of possible occurrence of single side slippage due to free distribution of the flow rate of two front wheel driving motors of the existing land leveler, the invention provides the land leveler front wheel driving hydraulic system, which comprises a left hydraulic motor, a right hydraulic motor, a hydraulic pump and a control valve connected with the hydraulic pump. The land leveler front wheel driving hydraulic system is characterized by also comprising a distribution valve, wherein the distribution valve comprises an electromagnetic switch valve, a hydraulic control reverse valve and an equal distribution valve, wherein the electromagnetic switch valve is connected between an opening T and the liquid control end of the liquid control reversing valve; the electromagnetic switch valve enables the liquid control reversing valve to work in a first work position or a second work position; hydraulic oil enters the motors through the liquid control reversing valve, the equal distribution valve and the like or is freely distributed to the hydraulic motors only by the liquid control reversing valve according to the requirements.
Description
Technical field
A kind of a kind of the present invention relates to level land machine hydraulic system, more particularly, it relates to land leveller front wheel driven hydraulic system
System.
Background technology
Existing land leveller front-wheel drive mode is the front-wheel drive open type hydraulic system of a pump band two motor, as shown in figure 1,
Hydraulic pump 1 pump discharge pressure oil is directly accessed the motor 3 of two parallel connections after control valve 2, enters the flow of the pressure oil of two motors
For free distribution, when a side drive wheel is deteriorated with ground attachment condition, the ground reaction force that is, this side drive wheel is subject to becomes
Little, then this side motor obtains the flow of pressure oil and can increase, and leads to this side motor rotary speed to be accelerated, and opposite side motor rotary speed is slack-off
Even do not turn, i.e. the monolateral skidding of front-wheel.
Because land leveller working condition is more complicated, ground attachment condition is changeable, and how unbalance loading operating mode is relatively it is easy to make
Become wheel speed about during land leveller straight line operation inconsistent, or even the phenomenon of above-mentioned monolateral skidding occurs, lead to whole machine every
Degradation, such as power loss increase, hauling ability is deteriorated, and skid simultaneously and cause tire wear to aggravate, and lead to ground attachment bar
Part becomes worse, greatly reduces economy and the working performance of land leveller.
Content of the invention
The technical problem to be solved in the present invention is freely to distribute for existing land leveller two front-wheel drive motor flow to lead to
It is likely to occur monolateral slippage problems, and a kind of land leveller front wheel driven hydraulic system is provided.
The present invention is such that to provide a kind of left hydraulic motor of inclusion, right hydraulic pressure horse for the technical scheme realizing its purpose
Reach, hydraulic pump, control valve it is characterised in that also including the control circuit that distributing valve and distributing valve connect, described distributing valve has
Flow freely distributes and two kinds of flow output modes of impartial distribution, the work oil-in of described control valve and the pump of described hydraulic pump
Mouth connects, and the work b mouth of described control valve is connected with the first actuator port of described left hydraulic motor and right hydraulic motor simultaneously；
The work the allocated valve of a mouth of described control valve is connected with the second actuator port of described left hydraulic motor and right hydraulic motor.?
In the present invention, hydraulic pressure has and flows to from the work oil-in of described control valve, from work a mouth output, after work b mouth backflow again from
The fuel tank circuit interface of control valve enters fuel tank loop；Or from work b mouth output, again from control valve after work a mouth backflow
Fuel tank circuit interface enters fuel tank loop；Distributing valve can be realized impartial distribution and freely distribute two kinds of assignment of traffic patterns.When
Land leveller control circuit in straight line operation controls distributing valve to work in impartial allocation model, makes front-wheel both sides motor be assigned to phase
Deng flow, the ground regardless of front-wheel both sides tire adheres to condition, front-wheel both sides motors all can be made to keep equal rotating speed,
Eliminate monolateral skidding.When land leveller turns to, control circuit controls distributing valve to switch to free allocation model, front-wheel both sides
Motor distributes flow it is ensured that steering is smoothed out automatically according to turning to needs.
In above-mentioned land leveller front wheel driven hydraulic system, described distributing valve has p mouth, t mouth, c mouth, d mouth；T mouth and fuel tank
Loop connects, and connects with the work a mouth of described control valve with the p mouth of described distributing valve, the c mouth of described distributing valve is corresponding with d mouth
Connect with described left hydraulic motor and right hydraulic motor second actuator port.Described distributing valve and inclusion electromagnetic switch valve, hydraulic control
Reversal valve, impartial distributing valve, described electromagnetic switch valve is connected between the hydraulic control end of described pilot operated directional control valve and t mouth, described equal
It is made up of two identical choke valves in distributing valve, one end of described two throttlings is all connected with the k mouth of described equalization distributing valve,
The other end correspondence of two choke valves is connected with described c mouth and d mouth；Described pilot operated directional control valve have the e mouth connecting with p mouth and
First hydraulic fluid port of described equalization distributing valve k mouth connection and the second hydraulic fluid port connecting with described c mouth and d mouth；Described pilot operated directional control valve
Hydraulic control end connect with the e mouth of described pilot operated directional control valve, when described pilot operated directional control valve is in the first working position its e mouth and first oil
Mouth conducting, its e mouth and the conducting of the second hydraulic fluid port when described pilot operated directional control valve is in the second working position.
In above-mentioned land leveller front wheel driven hydraulic system, between described c mouth and d mouth, it is connected with the 3rd choke valve.
In above-mentioned land leveller front wheel driven hydraulic system, the hydraulic control end of described pilot operated directional control valve and the e mouth of pilot operated directional control valve
Between oil circuit be provided with the 4th choke valve.
In above-mentioned land leveller front wheel driven hydraulic system, also include control circuit, the electric magnet of described electromagnetic switch valve is even
It is connected in institute's control circuit, described control circuit is included by the pressure switch of described land leveller steering pressure triggering, pressure switch
During closure, described electromagnetic switch valve is on position makes described pilot operated directional control valve work in the second working position, when pressure switch disconnects
Described electromagnetic switch valve is in cut-off position makes described pilot operated directional control valve work in the first working position.
In above-mentioned land leveller front wheel driven hydraulic system, described control circuit also includes forerunner and enables switch, controls relay
Device, described forerunner enables switch and the electric magnet of electromagnetic switch valve is connected on the contact series of described control relay；Described pressure
Power switch is serially connected on the coil of described control relay.
In above-mentioned land leveller front wheel driven hydraulic system, distributing valve relay indicating light, described distributing valve relay indicating light with
The electric magnet of described electromagnetic switch valve is in parallel or series.
The present invention compared with prior art, open by the front-wheel drive of effectively solving of the present invention existing land leveller one pump band two motor
The defect of the monolateral skidding of keeping straight on existing for formula hydraulic system, land leveller, during straight trip arrives straight trip again to steering, distributes
Valve assignment of traffic pattern automatically switches, and realizes automatic control function.
Brief description
Fig. 1 is existing land leveller front wheel driven hydraulic systematic schematic diagram.
Fig. 2 is land leveller front wheel driven hydraulic system of the present invention.
Fig. 3 is the schematic diagram of distributing valve in the present invention.
Fig. 4 is the electric control theory figure of the present invention.
In figure parts title and sequence number:
Hydraulic pump 1, control valve 2, motor 3, distributing valve 4, electromagnetic switch valve 41, pilot operated directional control valve 42, impartial distributing valve 43,
First throttle valve 431, second throttle 432, the 3rd choke valve 44, the 4th choke valve 45, pressure switch 5, forerunner enable switch
6th, control relay 7, electric magnet 8, distributing valve relay indicating light 9.
Specific embodiment
Specific embodiments are described below in conjunction with the accompanying drawings.
As shown in Fig. 2 the land leveller front wheel driven hydraulic system in the present embodiment includes motor 3, hydraulic pump 1, control valve
2nd, distributing valve 3 etc..Wherein hydraulic pump 1 is Variable plunger pump, and motor 3 includes two hydraulic motors with left and right front-wheel.Control valve 2
It is connected with hydraulic pump 1, two actuator ports of control valve 2 are the first work of b mouth in a mouth and b mouth and two hydraulic motors 3
Hydraulic fluid port connects, and a mouth of control valve 2 is connected with the p mouth of distributing valve 4, and the c mouth of distributing valve 4 and d mouth correspond to and two hydraulic motors 3
Second actuator port connect.By manipulating control valve 2, a mouth of achievable control valve 2 presses oil different flow directions with b oral fluid, from
And realize positive and negative rotation of motor.
As shown in figure 3, distributing valve 4 have p mouth, t mouth, c mouth, d mouth and include electromagnetic switch valve 41, pilot operated directional control valve 42,
Impartial distributing valve 43；Wherein: pilot operated directional control valve 42 has e mouth, the first hydraulic fluid port is g mouth, the second hydraulic fluid port is f mouth and h mouth, wherein f
Mouth is connected with c mouth, and h mouth is connected with d mouth, e mouth is connected with p mouth.Electromagnetic switch valve 41 is connected to the hydraulic control end of pilot operated directional control valve 42,
The hydraulic control end of pilot operated directional control valve 42 is connected with e mouth through the 4th choke valve 45 simultaneously, pilot operated directional control valve 42 spring cavity and t mouth even
Logical, t mouth and fuel tank circuit communication.When pilot operated directional control valve 42 is in the first working position, e mouth is turned on g mouth, at pilot operated directional control valve 42
When the second working position, e mouth is turned on f mouth and h mouth.
As shown in figure 3, impartial distributing valve 42 is made up of two identical choke valves, this two choke valves are respectively first segment
Stream valve 431 and second throttle 432, first throttle valve 431 is distributed with impartial after being connected with wherein one end of second throttle 432
The k mouth connection of valve, the other end port of first throttle valve 431 is connected with c mouth, and the another port of second throttle 432 is with d mouth even
Logical.It is connected with the 3rd choke valve 44 between c mouth and d mouth.The k mouth of impartial distributing valve is connected with the g mouth of pilot operated directional control valve.
As shown in Fig. 2 Fig. 4, control circuit includes forerunner and enables switch 6, control relay 7, pressure switch 5, distributing valve work
Make display lamp 9.Increase pressure transducer at steering gear feedback port, pressure switch 5 is triggered by land leveller steering pressure, works as level land
During machine straight trip, pressure transducer no signal, pressure switch 5 is off-state；When land leveller turns to, pressure transducer has letter
Number, triggering pressure switch 5 is at closure state.Forerunner enables switch 6 and the electric magnet 8 of electromagnetic switch valve 41 is connected on control
On outputting circuit for relay processed, i.e. the contact series with control relay；Pressure switch 5 is serially connected in the coil of control relay
On.Distributing valve relay indicating light 9 is in parallel with the electric magnet 8 of electromagnetic switch valve.The k1 termination power positive pole of control circuit, k2 terminates
Power cathode.
In the present embodiment, when forerunner's function enables switch 6 and disconnects, when that is, car load does not use front-wheel drive, distributing valve
Relay indicating light 9 does not work, and electric magnet 8 must not be electric, and the assignment of traffic pattern of distributing valve 4 is free allocation model.
When forerunner's function enables switch 6 closure, distributing valve relay indicating light 9 is bright, and meanwhile, electric magnet 8 obtains electric, Ye Ji electricity
The solenoid of magnetic switch valve 41 obtains electric, and electromagnetic switch valve is in by state, and pilot operated directional control valve works in the first working position,
I.e. upper, now the e mouth of pilot operated directional control valve and g mouth turn on, and e mouth and f mouth and h mouth are all by front wheel driven hydraulic oil is through equalization
Distributing valve exports from c mouth and d mouth, is equally distributed on two hydraulic motors it is ensured that front-wheel both sides motor during land leveller straight trip
Rotating speed is equal.Now, when land leveller turns to, pressure switch 5 closes, and control relay 7 obtains electric, distributing valve relay indicating light 9
Go out, meanwhile, electric magnet 8 dead electricity, namely electromagnetic switch valve is on position, pilot operated directional control valve works in the second working position, namely
Bottom, the e mouth of pilot operated directional control valve is both turned on f mouth and h mouth, and front wheel driven hydraulic oil freely distributes to c mouth and the output of d mouth, protects
Card land leveller turns to and is smoothed out；When land leveller recovers straight trip, pressure switch 5 disconnects, control relay 7 dead electricity, distributing valve
Relay indicating light 9 is bright, meanwhile, electric magnet 8 electric, pilot operated directional control valve work again with upper, the assignment of traffic pattern of distributing valve 4 oneself
Move and switch to impartial allocation model.
Claims (8)
1. a kind of land leveller front wheel driven hydraulic system, including left hydraulic motor, right hydraulic motor, hydraulic pump, control valve, it is special
Levy the control circuit being also to include that distributing valve and distributing valve connect, described distributing valve has flow and freely distributes and impartial distribution
Two kinds of flow output modes, the work oil-in of described control valve is connected with the pumping hole of described hydraulic pump, the work of described control valve
Make b mouth to connect with the first actuator port of described left hydraulic motor and right hydraulic motor simultaneously；The work a mouth warp of described control valve
Distributing valve is connected with the second actuator port of described left hydraulic motor and right hydraulic motor.
2. land leveller front wheel driven hydraulic system according to claim 1 is it is characterised in that described distributing valve has p mouth, t
Mouth, c mouth, d mouth；T mouth is connected with fuel tank loop, connects with the work a mouth of described control valve with the p mouth of described distributing valve, described
The c mouth of distributing valve is connected with described left hydraulic motor and right hydraulic motor second actuator port with d mouth correspondence.
3. land leveller front wheel driven hydraulic system according to claim 2 it is characterised in that described distributing valve and include electricity
Magnetic switch valve, pilot operated directional control valve, impartial distributing valve, described electromagnetic switch valve is connected to hydraulic control end and the t of described pilot operated directional control valve
Between mouthful, described equalization distributing valve is made up of two identical choke valves, one end of described two throttlings all with described equal decile
Join the k mouth connection of valve, the other end correspondence of two choke valves is connected with described c mouth and d mouth；Described pilot operated directional control valve has and p
The first hydraulic fluid port and the second hydraulic fluid port connecting with described c mouth and d mouth that the e mouth of mouth connection is connected with described equalization distributing valve k mouth；
The hydraulic control end of described pilot operated directional control valve is connected with the e mouth of described pilot operated directional control valve, and described pilot operated directional control valve is in the first working position
When its e mouth and the first hydraulic fluid port conducting, when described pilot operated directional control valve is in the second working position, its e mouth and the second hydraulic fluid port turn on.
4. land leveller front wheel driven hydraulic system according to claim 3 is it is characterised in that connect between described c mouth and d mouth
It is connected to the 3rd choke valve.
5. land leveller front wheel driven hydraulic system according to claim 3 is it is characterised in that the liquid of described pilot operated directional control valve
Oil circuit between control end and the e mouth of pilot operated directional control valve is provided with the 4th choke valve.
6. land leveller front wheel driven hydraulic system according to any one of claim 1 to 5 is it is characterised in that described electromagnetism
The electric magnet of switch valve is connected in institute's control circuit, and described control circuit is included by the pressure of described land leveller steering pressure triggering
Power switchs, and during pressure switch closure, described electromagnetic switch valve is on position makes described pilot operated directional control valve work in the second work
Position, when pressure switch disconnects, described electromagnetic switch valve is in cut-off position makes described pilot operated directional control valve work in the first working position.
7. land leveller front wheel driven hydraulic system according to claim 6 is it is characterised in that described control circuit also includes
Forerunner enables switch, control relay, and described forerunner enables switch and the electric magnet of electromagnetic switch valve is connected on controlled relay
The contact series of device；Described pressure switch is serially connected on the coil of described control relay.
8. land leveller front wheel driven hydraulic system according to claim 6 is it is characterised in that distributing valve relay indicating light, institute
State the electric magnet of distributing valve relay indicating light and described electromagnetic switch valve in parallel or series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610920339.2A CN106351898B (en) | 2016-10-21 | 2016-10-21 | Land leveller front wheel driven hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610920339.2A CN106351898B (en) | 2016-10-21 | 2016-10-21 | Land leveller front wheel driven hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106351898A true CN106351898A (en) | 2017-01-25 |
| CN106351898B CN106351898B (en) | 2018-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610920339.2A Active CN106351898B (en) | 2016-10-21 | 2016-10-21 | Land leveller front wheel driven hydraulic system |
Country Status (1)
| Country | Link |
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| CN (1) | CN106351898B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107448425A (en) * | 2017-07-21 | 2017-12-08 | 广西柳工机械股份有限公司 | Control valve and land leveller front wheel driven hydraulic system |
| CN109356895A (en) * | 2018-10-31 | 2019-02-19 | 广西柳工机械股份有限公司 | Land leveller front-wheel drive control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107448425A (en) * | 2017-07-21 | 2017-12-08 | 广西柳工机械股份有限公司 | Control valve and land leveller front wheel driven hydraulic system |
| CN109356895A (en) * | 2018-10-31 | 2019-02-19 | 广西柳工机械股份有限公司 | Land leveller front-wheel drive control system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106351898B (en) | 2018-06-26 |
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