CN107165897A - A kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism - Google Patents
A kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism Download PDFInfo
- Publication number
- CN107165897A CN107165897A CN201710546961.6A CN201710546961A CN107165897A CN 107165897 A CN107165897 A CN 107165897A CN 201710546961 A CN201710546961 A CN 201710546961A CN 107165897 A CN107165897 A CN 107165897A
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- China
- Prior art keywords
- hydraulic
- hydraulic control
- valve
- vehicle body
- control system
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/16—Special measures for feedback, e.g. by a follow-up device
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Vehicle Body Suspensions (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Abstract
The present invention relates to agricultural machinery technological field, more particularly, to a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism.Including sensor, ECU and hydraulic system, sensor and hydraulic system are electrically connected with ECU respectively, the hydraulic system includes fuel tank, oil pump, proportion directional throttle valve, check valve, counterbalance valve, hydraulic cylinder and hydraulic control one-way valve, connect to form oil circuit by oil pipe between each part so that hydraulic system possesses commutation speed-regulating function, locking function, equilibrium function, load releasing function.
Description
Technical field
The present invention relates to agricultural machinery technological field, more particularly, to a kind of liquid of agricultural machinery vehicle body elevating mechanism
Pressure control system.
Background technology
Farm machinery often uses running on wheels or crawler travel.Crawler-type traveling will consume more multi-energy, and efficiency is low, crawler belt pair
Soil original appearance destruction is big, has a great impact to crops;Running on wheels control is simple, efficiency high, is used widely.
Suspension is fixed using spring more than the farm machinery of current running on wheels, agricultural equipment use according to requirements by
Artificial control lifting.Because crops land used is generally uneven state, machine is easy to vehicle body and ground occur in operation
Or with crops occur it is improper contact, crops may be hurt;Machine is in pitch state, agricultural equipment and ground
Distance is in change, and manually operation utensil is it is difficult to ensure that be accurately positioned, and production operation precision is low, and manipulation strength is big, seriously
It has impact on effectively using for machine.
The content of the invention
The present invention is to overcome at least one defect described in above-mentioned prior art can be automatic according to state of ground there is provided one kind
Realize that vehicle body is lifted, accurate positioning is not required to artificial interference, reduces the farm machinery vehicle body elevating mechanism of operating personnel's working strength
Hydraulic control system.
In order to solve the above technical problems, present invention employs following technical scheme:
A kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism, including sensor, ECU and hydraulic system, sensing
Device and hydraulic system are electrically connected with ECU respectively, and the hydraulic system includes fuel tank, oil pump, proportion directional throttle valve, list
To valve, counterbalance valve, hydraulic cylinder and hydraulic control one-way valve;Fuel tank stores hydraulic oil, and oil pump is connected with fuel tank, the extract from fuel tank
Force feed is supplied to oil circuit, two interfaces of four interfaces of proportion directional throttle valve respectively with fuel pump outlet, fuel tank and hydraulic cylinder
Be connected, the rod end and rear end of hydraulic cylinder are connected respectively connects proportion directional throttle valve after hydraulic control one-way valve, counterbalance valve and
After check valve is in parallel in the oil circuit of access hydraulic cylinder rear end connection proportion directional throttle valve, the hydraulic control mouthful of counterbalance valve and check valve
Oil inlet be connected with proportion directional throttle valve.The situation on sensor detection ground simultaneously communicates information to ECU, electricity
Control unit is handled information and controls hydraulic system to adjust vehicle body lifts direction and adjustment amount with agricultural equipment;Above-mentioned hydraulic pressure
Control system is also equipped with following advantage:When hydraulic cylinder be in decline state when, check valve cut-off, oil return can only by counterbalance valve,
Because counterbalance valve is only just turned on when the rod end of hydraulic cylinder leads to hydraulic oil, prevent hydraulic cylinder from shape out of control occur in decline
State, it is ensured that hydraulic cylinder smooth decreasing;Proportion directional throttle valve is in middle position off-load when hydraulic cylinder does not work, and reduces energy and damages
Lose, improve the life-span of oil pump, efficiency high.
Further, proportion directional throttle valve is electrically connected with ECU, ECU control proportion directional throttle valve from
And control hydraulic cylinder to commutate and speed governing.The information that ECU is detected according to sensor is sent accordingly to proportion directional throttle valve
Electric current, proportion directional throttle valve has commutation and speed-regulating function, when proportion directional throttle valve is in left position, and hydraulic cylinder, which is in, to be risen
State;When ratio side's commutation choke valve is in right position, hydraulic cylinder is in decline state.
Further, described hydraulic system includes two hydraulic cylinders and four hydraulic control one-way valves, and two hydraulic cylinders have
Rod end and rear end connect after a hydraulic control one-way valve correspondence and linked together respectively, each one of two hydraulic cylinders or so, the two
Keep synchronous working.Four hydraulic control one-way valves make hydraulic cylinder possess locking function, when the choke valve that commutates is in middle position, four
Hydraulic control one-way valve is in cut-off state, and it can make piston rapid, steady, reliable when hydraulic cylinder does not work and be locked for a long time
Firmly, it will not be moved because of external force.
Further, described hydraulic control system also includes overflow valve and filter, and filter is connected to fuel tank and oil
In the middle of pump, hydraulic oil is filtered, overflow valve is connected in parallel on oil pump two ends, maintain the oil pressure of working connection stable.
Further, the connection between each part of hydraulic system is connected by oil pipe.
Preferably, described ECU is ECU automobile specified microcomputerized controllers;ECU is by microprocessor, memory, defeated
Enter/output interface, analog-digital converter and shaping, the large scale integrated circuit such as driving composition.Also referred to as " car running computer ".
Preferably, the proportion directional throttle valve is direct acting type proportion directional throttle valve, and the hydraulic cylinder is single rod liquid
Cylinder pressure, the sensor is ultrasonic sensor.
Compared with prior art, beneficial effect is:(1)Vehicle body is controlled to lift by computer, automaticity is high;(2)
With unloading function, consuming little energy, efficiency high;(3)Using standard component, original paper quantity is few, simple in construction, assembly cost
It is low;(4)Realize vehicle body and any position reliable location of agricultural equipment.
Brief description of the drawings
Fig. 1 is the structural representation of hydraulic system.
Embodiment
As shown in figure 1, hydraulic system includes fuel tank 1, filter 2, oil pump 3, proportion directional throttle valve 4, check valve 8, the back of the body
Pressure valve 5, two asymmetric servo cylinders 7, overflow valve 9 and hydraulic control one-way valve 6;Fuel tank 1 stores hydraulic oil, the connection filter 2 of oil pump 3
It is connected afterwards with fuel tank 1, hydraulic oil is extracted from fuel tank 1 and is supplied to oil circuit, counterbalance valve 5 is connected in parallel on 3 liang of filter 2 and oil pump
End, four interfaces of proportion directional throttle valve 4 are connected with two interfaces of fuel pump outlet, fuel tank 1 and asymmetric servo cylinder 7 respectively
Connect, the rod end and rear end of two asymmetric servo cylinders 7 are connected respectively connects proportion directional throttling after a hydraulic control one-way valve 6
In the oil circuit that the rear end of asymmetric servo cylinder 7 connection proportion directional throttle valve 4 is accessed after valve 4, counterbalance valve 5 and the parallel connection of check valve 8,
The hydraulic control mouthful of counterbalance valve 5 is connected with the oil inlet and proportion directional throttle valve 4 of check valve 8, and above-mentioned connection is connected by oil pipe
Connect.
A kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism of the present invention also includes ECU and ultrasonic wave
Sensor, ECU connects ultrasonic sensor and the proportion directional throttle valve of hydraulic system, ultrasonic sensor peace respectively
On agricultural equipment, for detecting farmland surface appearance, sensor will detect state of ground passed to electric signal it is automatically controlled
Unit, ECU requires to send phase induced current, proportion directional throttling to direct acting type proportion directional throttle valve according to actual control
Valve has commutation and speed-regulating function, when proportion directional throttle valve is in left position, and hydraulic cylinder is in propradation;Proportion directional throttles
When valve is in right position, hydraulic cylinder is in decline state.Realize that adjust automatically vehicle body lifts direction and adjustment amount with agricultural equipment.
Specifically, when hydraulic cylinder is in different working condition, the flow direction of hydraulic oil is as follows:
(1) hydraulic cylinder rises:Direct acting type proportion directional throttle valve is in left position;
Fuel feeding:Oil pump 3 → direct acting type proportion directional throttle valve 8 → hydraulic control one-way valve of left 4 → check valve of position, 6 → hydraulic cylinder 7 is without bar
End;
Oil return:7 rod ends of the hydraulic cylinder → left 4 → fuel tank of position 1 of hydraulic control one-way valve 6 → direct acting type proportion directional throttle valve.
(2) hydraulic cylinder declines:Direct acting type proportion directional throttle valve is in right position;
Fuel feeding:The rod end of 6 → hydraulic cylinder of the oil pump right 4 → hydraulic control one-way valve of position of 3 → direct acting type proportion directional throttle valve 7;
Oil return:7 rear ends of the hydraulic cylinder → right 4 → fuel tank of position of hydraulic control one-way valve 6 → counterbalance valve, 5 → direct acting type proportion directional throttle valve
1。
(3) hydraulic cylinder is motionless:Direct acting type proportion directional throttle valve is in middle position, and oil pump is in unloading condition, hydraulic cylinder lock
It is only motionless;
Oil circuit:4 → fuel tank of oil pump 3 → direct acting type proportion directional throttle valve middle position 1.
Hydraulic system is also equipped with following function in addition to possessing commutation speed-regulating function:
Locking function:When proportion directional throttle valve 4 is in middle position, four hydraulic control one-way valves are in cut-off state, and it can be in list
Outlet-rod hydraulic cylinder 7 makes piston rapid, steady, reliable and is lockable for a long time when not working, will not be moved because of external force;
Equilibrium function:When asymmetric servo cylinder 7 is in decline state, check valve 8 ends, oil return can only by counterbalance valve 5, by
Only just turned on when the rod end of asymmetric servo cylinder 7 leads to hydraulic oil in counterbalance valve 5, can prevent asymmetric servo cylinder 7 under
Occurs runaway condition during drop, it is ensured that the smooth decreasing of asymmetric servo cylinder 7;
Load releasing function:Proportion directional throttle valve 4 is in middle position off-load when asymmetric servo cylinder 7 does not work, and reduces energy loss,
Improve the life-span of oil pump, efficiency high.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Any modifications, equivalent substitutions and improvements made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (10)
1. a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism, it is characterised in that:Including sensor, ECU and
Hydraulic system, sensor and hydraulic system are electrically connected with ECU respectively, and the hydraulic system includes fuel tank(1), oil pump
(3), proportion directional throttle valve(4), check valve(8), counterbalance valve(5), hydraulic cylinder(7)And hydraulic control one-way valve(6);Fuel tank(1)Storage
Liquid storage is pressed oil, oil pump(3)With fuel tank(1)It is connected, from fuel tank(1)Middle extraction hydraulic oil is supplied to oil circuit, proportion directional throttling
Valve(4)Four interfaces respectively with fuel pump outlet, fuel tank(1)And hydraulic cylinder(7)Two interfaces be connected, hydraulic cylinder(8)'s
Rod end and rear end connect hydraulic control one-way valve respectively(6)After connect proportion directional throttle valve(4), counterbalance valve(5)And check valve
(8)Hydraulic cylinder is accessed after parallel connection(7)Rear end connects proportion directional throttle valve(4)Oil circuit in, counterbalance valve(5)Hydraulic control mouthful with
Check valve(8)Oil inlet and proportion directional throttle valve(4)It is connected.
2. a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism according to claim 1, it is characterised in that:Institute
The hydraulic system stated includes two hydraulic cylinders(7)With four hydraulic control one-way valves(6), two hydraulic cylinders(7)Rod end and without bar
End connects a hydraulic control one-way valve respectively(6)Correspond to and link together afterwards.
3. a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism according to claim 1 or 2, its feature exists
In:Described hydraulic control system also includes overflow valve(9), with oil pump(3)It is in parallel.
4. a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism according to claim 1 or 2, its feature exists
In:Described hydraulic control system also includes filter(2), it is connected to fuel tank(1)And oil pump(3)It is middle.
5. a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism according to claim 1, it is characterised in that:Liquid
Connection between pressure various parts is connected by oil pipe.
6. a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism according to claim 1, it is characterised in that:Institute
State proportion directional throttle valve(4)For direct acting type proportion directional throttle valve.
7. a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism according to claim 1, it is characterised in that:Institute
Hydraulic cylinder is stated for asymmetric servo cylinder.
8. a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism according to claim 1, it is characterised in that:Institute
Sensor is stated for ultrasonic sensor, the situation for sensing farmland surface.
9. a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism according to claim 1, it is characterised in that:Than
Example directional throttle valve(4)Electrically connected with ECU, ECU control proportion directional throttle valve (4) is so as to control hydraulic cylinder to change
To and speed governing.
10. a kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism according to claim 1, it is characterised in that:
Described ECU is ECU automobile specified microcomputerized controllers.
Priority Applications (1)
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CN201710546961.6A CN107165897A (en) | 2017-07-06 | 2017-07-06 | A kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism |
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CN201710546961.6A CN107165897A (en) | 2017-07-06 | 2017-07-06 | A kind of hydraulic control system of agricultural machinery vehicle body elevating mechanism |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108591188A (en) * | 2018-01-17 | 2018-09-28 | 岭南师范学院 | A kind of hydraulic control system of sugar-cane cutting machine |
CN111677708A (en) * | 2020-07-13 | 2020-09-18 | 北京世纪合兴起重科技有限公司 | Emergency operation hydraulic system and hydraulic hoist |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108591188A (en) * | 2018-01-17 | 2018-09-28 | 岭南师范学院 | A kind of hydraulic control system of sugar-cane cutting machine |
CN111677708A (en) * | 2020-07-13 | 2020-09-18 | 北京世纪合兴起重科技有限公司 | Emergency operation hydraulic system and hydraulic hoist |
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Application publication date: 20170915 |
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