CN110594222A - Hydraulic valve group of unmanned agricultural machine - Google Patents
Hydraulic valve group of unmanned agricultural machine Download PDFInfo
- Publication number
- CN110594222A CN110594222A CN201910819435.1A CN201910819435A CN110594222A CN 110594222 A CN110594222 A CN 110594222A CN 201910819435 A CN201910819435 A CN 201910819435A CN 110594222 A CN110594222 A CN 110594222A
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- valve
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- hydraulic
- agricultural machine
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- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 84
- 230000009471 action Effects 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- 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
-
- 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
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic valve group of an unmanned agricultural machine, which comprises a variable pump, a variable control mechanism, a variable control valve, a first one-way sequence valve, a first shuttle valve, a second one-way sequence valve, a first throttle valve, a second shuttle valve, a three-position four-way electric proportional valve, a hydraulic control three-way valve, a second throttle valve, a third throttle valve, an oil return port T and an oil inlet port P, wherein the variable pump is connected with the hydraulic control three-way valve through the oil inlet port P, an oil outlet of the hydraulic control multi-way three-way valve is respectively connected with oil inlets of an external oil inlet, the three-position four-way electric proportional valve and the oil return port T, the third throttle valve is arranged between the hydraulic control three-way valve and the oil return port T, the hydraulic valve group of the unmanned agricultural machine can supply oil and supply pressure according to needs, reduce energy consumption, realize the functions of preferential steering and hydraulic output of the unmanned agricultural machine, and simultaneously ensure that the unmanned agricultural machine steers, the stability of the unmanned agricultural machine is higher.
Description
Technical Field
The invention relates to the technical field of hydraulic valve banks, in particular to a hydraulic valve bank of an unmanned agricultural machine.
Background
The steering and hydraulic output of the traditional agricultural machinery equipment respectively adopt two quantitative hydraulic pumps for oil supply, the two quantitative hydraulic pumps cannot work in a coordinated mode, and meanwhile, the two quantitative pumps always output pressure and flow, so that the problems of large energy loss, low efficiency, poor economy, large installed power, unreasonable power utilization and the like can occur.
When the unmanned agricultural machinery performance test is carried out, the hydraulic valve bank of the transmission agricultural machinery still consumes energy when turning to and hydraulic output does not work, so that the operation cost is improved, the priority cannot be guaranteed by turning to and hydraulic output simultaneously, the turning to and the hydraulic output can not be carried out simultaneously, and the stability of the operation of the unmanned agricultural machinery can be influenced due to low turning precision.
Disclosure of Invention
The invention aims to overcome the technical problems in the prior art, and provides a hydraulic valve bank of an unmanned agricultural machine, which can supply oil and pressure to the unmanned agricultural machine as required, reduce energy consumption, realize the functions of preferential steering and hydraulic output of the unmanned agricultural machine, realize stepless adjustment of steering speed, ensure that the unmanned agricultural machine can be steered accurately and in place at one time, effectively lock the steering position, ensure that the operation stability of the unmanned agricultural machine is higher, and effectively solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a hydraulic valve set of an unmanned agricultural machine comprises a variable pump, a variable control mechanism, a variable control valve, a first one-way sequence valve, a first shuttle valve, a second one-way sequence valve, a first throttle valve, a second shuttle valve, a three-position four-way electric proportional valve, a hydraulic control three-way valve, a second throttle valve, a third throttle valve, an oil return port T and an oil inlet port P, wherein the variable pump is connected with the hydraulic control three-way valve through the oil inlet port P, the oil outlet of the hydraulic control three-way valve is respectively connected with oil inlets of an external multi-way valve, the three-position four-way electric proportional valve and the oil return port T, the third throttle valve is arranged between the hydraulic control three-way valve and the oil return port T, the oil return port T is connected with an oil tank, the first one-way sequence valve is connected with the second one-way sequence valve through a hydraulic pipeline, the oil inlets of the first one-way sequence valve and the second one-way sequence valve are, the oil outlet of the first throttle valve is respectively connected with the oil inlets of the second shuttle valve, the overflow valve and the third throttle valve, the oil outlet of the first throttle valve is provided with steering load feedback pressure oil Ls2, the overflow valve is connected with an oil return port T, the oil inlet at the other end of the second shuttle valve is connected with an external multi-way valve, the joint of the oil inlet and the external multi-way valve is provided with multi-way valve load feedback pressure oil Ls1, the oil outlet of the second shuttle valve is connected with the variable control valve, and the input end of the three-position four-way electric proportional valve is electrically connected with the output end of.
As a preferable technical solution of the present invention, a second check valve is provided between the hydraulic control three-way valve and the external multi-way valve, and a connection point between the hydraulic control three-way valve and the second check valve is a connection port P2.
As a preferable technical solution of the present invention, a first check valve is disposed between the hydraulic control three-way valve and the three-position four-way electric proportional valve, and a connection point between the hydraulic control three-way valve and the first check valve is a connection port P1.
As a preferable technical scheme of the invention, the hydraulic control three-way valve, the second throttling valve and the overflow valve form a priority valve system.
As a preferable technical solution of the present invention, the first shuttle valve, the first throttle valve, and the third throttle valve constitute a priority control oil path.
As a preferable aspect of the present invention, the first shuttle valve, the first throttle valve, and the second shuttle valve constitute a variable displacement pump displacement control oil path.
As a preferable technical solution of the present invention, the first one-way sequence valve and the second one-way sequence valve are both connected to a steering mechanism.
As a preferable technical scheme of the invention, the external multi-way valve is connected with an oil tank in an oil return mode.
Compared with the prior art, the invention has the beneficial effects that: the hydraulic valve bank of the unmanned agricultural machine has reasonable design, compact structure and small occupied space when in use, realizes the function of preferential steering by adopting the load feedback variable pump to supply oil and the hydraulic control three-way valve to control the flow direction of liquid, and ensures the safety without losing the direction when the agricultural machine works; the load feedback variable pump receives a load feedback signal, supplies oil and pressure as required, has low energy consumption and good economical efficiency, and is particularly suitable for agricultural equipment which has urgent requirements on energy conservation; the three-position four-way electro-proportional valve is adopted, an external electric control system provides a steering signal to control the flow and the direction of fluid, so that the steering speed and the steering angle of the agricultural machine are controlled, the three-position four-way electro-proportional valve is particularly suitable for steering systems of unmanned, remotely-controlled and auxiliary-driven agricultural machines, the steering and the deviation correcting angles are accurately controlled according to positioning information, the stability is high, the repeatability is good, and the unmanned agricultural machine is more accurately controlled.
Drawings
Fig. 1 is a schematic diagram of the principle of the present invention.
In the figure: the variable valve control system comprises a first one-way sequence valve 1, a first shuttle valve 2, a second one-way sequence valve 3, a first throttling valve 4, a second shuttle valve 5, a three-position four-way electric proportional valve 6, a first one-way valve 7, a second one-way valve 8, a hydraulic control three-way valve 9, a second throttling valve 10, an overflow valve 11, a third throttling valve 12, a variable pump 13, a variable control mechanism 14 and a variable control valve 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments (for convenience of description and understanding, the left side of fig. 1 is taken as the left side for description). All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a hydraulic valve set of unmanned agricultural machinery comprises a variable pump 13, a variable control mechanism 14, a variable control valve 15, a first one-way sequence valve 1, a first shuttle valve 2, a second one-way sequence valve 3, a first throttle valve 4, a second shuttle valve 5, a three-position four-way electro-proportional valve 6, a hydraulic control three-way valve 9, a second throttle valve 10, a third throttle valve 12, an oil return port T and an oil inlet port P, wherein the variable pump 13 is connected with the hydraulic control three-way valve 9 through the oil inlet port P, an oil outlet of the hydraulic control three-way valve 9 is respectively connected with oil inlets of an external multi-way valve, the three-position four-way electro-proportional valve 6 and the oil return port T, a first one-way valve 7 is arranged between the hydraulic control three-way valve 9 and the three-way electro-proportional valve 6, a connecting port P1 is arranged at the connecting position of the hydraulic control three-way valve 9 and the first one-way valve 7, a second one-way valve 8 is arranged between the hydraulic control three-way valve 9 and, and avoids the impact of pressure fluctuation to the variable pump 13, the external multi-way valve returns oil and is connected with an oil tank, the joint of the hydraulic control three-way valve 9 and the second one-way valve 8 is a connecting port P2, a third throttle valve 12 is arranged between the hydraulic control three-way valve 9 and the oil return port T, the oil return port T is connected with the oil tank, the first one-way sequence valve 1 is connected with the second one-way sequence valve 3 through a hydraulic pipeline, the first one-way sequence valve 1 and the second one-way sequence valve 3 are both connected with a steering mechanism, the oil outlets of the first one-way sequence valve 1 and the second one-way sequence valve 3 are both connected with the oil inlet of the first shuttle valve 2, the arrangement of the first one-way sequence valve 1 and the second one-way sequence valve 3 ensures that the hydraulic oil in the steering execution mechanism is locked when no steering requirement exists, the driving direction is unchanged when external resistance is received, the adjustment of the direction is reduced, the straight, the oil outlet of the first throttle valve 4 is respectively connected with the oil inlets of a second shuttle valve 5, an overflow valve 11 and a third throttle valve 12, the oil outlet of the first throttle valve 4 is provided with steering load feedback pressure oil Ls2, the overflow valve 11 is connected with an oil return port T, the oil inlet at the other end of the second shuttle valve 5 is connected with an external multi-way valve, the joint of the oil inlet and the external multi-way valve is provided with multi-way valve load feedback pressure oil Ls1, the oil outlet of the second shuttle valve 5 is connected with a variable control valve 15, a hydraulic control three-way valve 9, the second throttle valve 10 and the overflow valve 11 form a priority valve system, the first shuttle valve 2, the first throttle valve 4 and the third throttle valve 12 form a priority control oil path, the first shuttle valve 2, the first throttle valve 4 and the second shuttle valve 5 form a variable pump 13 discharge control oil path, the input end of the three-position four-way electric proportional valve 6 is electrically, when the hydraulic steering device is used, the occupied space is small, automatic switching between steering and hydraulic output can be realized, oil can be supplied simultaneously when the flow is sufficient, and steering is preferred; the oil supply and pressure supply are realized according to the requirement, and the variable pump 13 has zero flow and zero power consumption when the steering and hydraulic output do not work.
When turning to and hydraulic output all is out of work, zero flow, zero consumption: under the condition of no steering and no hydraulic output, the pressure oil output by the variable pump 13 pushes the variable control valve 15 to move leftwards, the larger value of Ls1 and Ls2 flows back to the oil tank through Ls1 and Ls2 to enable the oil tank to work at the right position, the pressure oil enters the variable control mechanism 14 and overcomes the spring force, the displacement of the variable pump 13 is reduced to zero, and no flow is output; at this time, although the variable displacement pump 13 is rotating, its power consumption is zero, that is, when there is no steering and no hydraulic output, the power consumption is zero, and when the hydraulic output multi-way valve is not operating, Ls1 is communicated with the tank through the hydraulic output multi-way valve.
Steering is accurate: taking a right turn as an example, an external electric control system sends steering information to the three-position four-way electro-proportional valve 6 to enable the three-position four-way electro-proportional valve to work at a right position, a steering oil way is connected, hydraulic oil output by the variable pump 13 enters the three-position four-way electro-proportional valve 6 through the hydraulic control three-way valve 9 and the first one-way valve 7, then enters the steering mechanism through the second one-way sequence valve, the first one-way sequence valve 1 is pushed open by oil inlet pressure of the second one-way sequence valve 3, and oil return is returned to an oil return tank from the first one-way sequence valve to an oil return port T through the three-;
the external electric control system receives the steering signal, outputs a steering demand signal after processing, controls the opening degree of the three-position four-way electric proportional valve 6 by the steering signal, and controls the flow rate of the three-position four-way electric proportional valve from zero to the maximum value;
the first shuttle valve 2 selects the first one-way sequence valve 1 and the second one-way sequence valve 3 with high oil inlet end pressure to transmit to the first throttle valve 4, the low-flow high-pressure oil Ls2 of the first throttle valve 4 flows to the second shuttle valve 5, the second shuttle valve 5 selects the high-pressure oil inlet Ls1 and Ls2 of the external multi-way valve to transmit to the variable control valve 15, the pressure of the oil inlet pressure of the variable control valve 15 is balanced with the oil pressure of the oil inlet port P under the action of the spring force at the local side, if the oil pressure of the oil inlet port P is increased, the oil supply is excessive, at the moment, the valve core of the variable control valve moves leftwards, the pressure oil of the oil inlet port P enters the variable control mechanism 14 and pushes the oil inlet port P to move rightwards, the displacement of the variable pump 13 is;
the other path of high-pressure oil Ls2 flows to the third throttle valve 12 and the overflow valve 11, the overflow valve 11 is used for limiting the highest steering pressure, the third throttle valve 12 controls the oil inlet and outlet flow of the hydraulic control three-way valve 9 during steering, the moving speed of the hydraulic control three-way valve 9 is further controlled, and finally the steering speed is controlled.
Steering and hydraulic output work, wherein the steering is prior: when the hydraulic output works and the steering does not work, the valve core of the hydraulic control three-way valve 9 is subjected to the hydraulic thrust on the left side by the control oil from the port P1 through the second throttle valve, and simultaneously is subjected to the resultant force generated by the right side spring force and the control oil thrust, the control oil flows into the oil tank through the third throttle valve 12, under the action of the left side thrust, the valve core is pushed to move to the right, and the hydraulic control three-way valve 9 supplies oil to the external multi-way valve;
when steering is required, the valve core is pushed to move left under the combined action of thrust generated by the right Ls2 and spring force, so that steering priority is ensured;
when the steering and hydraulic output work simultaneously and the variable pump 13 supplies sufficient oil, the hydraulic control three-way valve 9 is positioned at a certain position in the middle under the combined action of acting forces on two sides, the steering oil supply requirement is preferentially met, the residual flow is supplied to the external multi-way valve, the requirement of simultaneous action of the steering and the hydraulic output is met, the oil is supplied to the working device when the steering is not performed or the flow is sufficient, the working speed is accelerated, and the working efficiency is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a hydraulic pressure valves of unmanned agricultural machinery which characterized in that: the variable displacement hydraulic control system comprises a variable displacement pump (13), a variable control mechanism (14), a variable control valve (15), a first one-way sequence valve (1), a first shuttle valve (2), a second one-way sequence valve (3), a first throttle valve (4), a second shuttle valve (5), a three-position four-way electric proportional valve (6), a hydraulic control three-way valve (9), a second throttle valve (10), a third throttle valve (12), an oil return port T and an oil inlet port P, wherein the variable displacement pump (13) is connected with the hydraulic control three-way valve (9) through the oil inlet port P, oil outlets of the hydraulic control three-way valve (9) are respectively connected with an external multi-way valve, the three-position four-way electric proportional valve (6) and oil inlets of the oil return port T, the third throttle valve (12) is arranged between the hydraulic control three-way valve (9) and the oil return port T, the oil return port T is connected with an oil tank, the, oil inlets of the first one-way sequence valve (1) and the second one-way sequence valve (3) are connected with an oil outlet of the first shuttle valve (2), an oil outlet of the first shuttle valve (2) is connected with an oil inlet of the first throttle valve (4), an oil outlet of the first throttle valve (4) is respectively connected with oil inlets of the second shuttle valve (5), an overflow valve (11) and a third throttle valve (12), a steering load feedback pressure oil Ls2 is arranged at the oil outlet of the first throttle valve (4), the overflow valve (11) is connected with an oil return port T, an oil inlet at the other end of the second shuttle valve (5) is connected with an external multi-way valve, a multi-way valve load feedback pressure oil Ls1 is arranged at the connection position of the oil outlet of the second shuttle valve (5) and the variable control valve (15), and an input end of the three-position four-way electric proportional valve (6) is electrically connected with an output end of an external electric.
2. The hydraulic valve bank of an unmanned agricultural machine according to claim 1, wherein: and a second one-way valve (8) is arranged between the hydraulic control three-way valve (9) and the external multi-way valve, and a connecting part of the hydraulic control three-way valve (9) and the second one-way valve (8) is a connecting port P2.
3. The hydraulic valve bank of an unmanned agricultural machine according to claim 1, wherein: a first one-way valve (7) is arranged between the hydraulic control three-way valve (9) and the three-position four-way electric proportional valve (6), and a connecting part of the hydraulic control three-way valve (9) and the first one-way valve (7) is a connecting port P1.
4. The hydraulic valve bank of an unmanned agricultural machine according to claim 1, wherein: the hydraulic control three-way valve (9), the second throttling valve (10) and the overflow valve (11) form a priority valve system.
5. The hydraulic valve bank of an unmanned agricultural machine according to claim 1, wherein: the first shuttle valve (2), the first throttle valve (4) and the third throttle valve (12) form a priority control oil path.
6. The hydraulic valve bank of an unmanned agricultural machine according to claim 1, wherein: and the first shuttle valve (2), the first throttle valve (4) and the second shuttle valve (5) form a displacement control oil path of the variable displacement pump (13).
7. The hydraulic valve bank of an unmanned agricultural machine according to claim 1, wherein: and the first one-way sequence valve (1) and the second one-way sequence valve (3) are both connected with a steering mechanism.
8. The hydraulic valve bank of an unmanned agricultural machine according to claim 1, wherein: and the return oil of the external multi-way valve is connected with an oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910819435.1A CN110594222B (en) | 2019-08-31 | 2019-08-31 | Hydraulic valve group of unmanned agricultural machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910819435.1A CN110594222B (en) | 2019-08-31 | 2019-08-31 | Hydraulic valve group of unmanned agricultural machinery |
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| Publication Number | Publication Date |
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| CN110594222A true CN110594222A (en) | 2019-12-20 |
| CN110594222B CN110594222B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910819435.1A Active CN110594222B (en) | 2019-08-31 | 2019-08-31 | Hydraulic valve group of unmanned agricultural machinery |
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| CN (1) | CN110594222B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404735A (en) * | 2021-06-22 | 2021-09-17 | 中煤科工集团重庆研究院有限公司 | Load-sensitive hydraulic system for adjusting inclination angle of drilling machine and working method of load-sensitive hydraulic system |
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-
2019
- 2019-08-31 CN CN201910819435.1A patent/CN110594222B/en active Active
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| CN110594222B (en) | 2024-04-19 |
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