CN110594222B - Hydraulic valve group of unmanned agricultural machinery - Google Patents
Hydraulic valve group of unmanned agricultural machinery Download PDFInfo
- Publication number
- CN110594222B CN110594222B CN201910819435.1A CN201910819435A CN110594222B CN 110594222 B CN110594222 B CN 110594222B CN 201910819435 A CN201910819435 A CN 201910819435A CN 110594222 B CN110594222 B CN 110594222B
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- throttle
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- 230000007246 mechanism Effects 0.000 claims abstract description 14
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 84
- 230000009471 action Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 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
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 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
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 three-way valve is respectively connected with an oil inlet of an external multiway valve, the three-position four-way electric proportional valve and the oil return port T, and the third throttle valve is arranged between the hydraulic control three-way valve and the oil return port T.
Description
Technical Field
The invention relates to the technical field of hydraulic valve groups, in particular to a hydraulic valve group of an unmanned agricultural machine.
Background
The steering and hydraulic output of the traditional agricultural machinery equipment are respectively supplied with oil by adopting two quantitative hydraulic pumps, the two quantitative hydraulic pumps cannot work in coordination with each other, 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 unmanned agricultural machinery performance test is carried out, the hydraulic valve group of transmission agricultural machinery still can consume the energy when turning to and hydraulic output do not work, causes the improvement of operation cost, turns to simultaneously and hydraulic output can't guarantee the priority and both go on simultaneously, turns to the stability that the precision was also can influence unmanned agricultural machinery operation moreover low.
Disclosure of Invention
The invention aims to overcome the existing defects, and provides the hydraulic valve group of the unmanned agricultural machine, which can enable the unmanned agricultural machine to supply oil and pressure 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, enable the unmanned agricultural machine to steer accurately in place once, effectively lock the steering position, enable the operation stability of the unmanned agricultural machine to be higher, and effectively solve the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the hydraulic valve bank of the unmanned agricultural machinery comprises a variable pump, a variable control mechanism, a variable control valve, a first unidirectional sequence valve, a first shuttle valve, a second unidirectional 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 the oil inlets of an external multiway valve, the three-position four-way electric proportional valve and the oil return port T, a 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 unidirectional sequence valve is connected with the second unidirectional sequence valve through a hydraulic pipeline, the oil inlet of the first unidirectional sequence valve and the second unidirectional sequence valve are connected with the oil inlet of the first shuttle valve, the oil outlet of the first shuttle valve is connected with the oil inlet of the first throttle valve, the oil outlet of the first throttle valve is respectively connected with the second shuttle valve, the overflow valve and the third throttle valve are connected with the oil inlet of the third throttle valve, the oil outlet of the first throttle valve is respectively, the oil outlet of the hydraulic control three-way valve is connected with the second shuttle valve, the three-way valve is connected with the oil inlet of the load and the load, the load is connected with the output end of the load of the three-way valve, and the load is the load, and the load is connected with the load is the load at the output from the load.
As a preferable technical scheme of the invention, a second one-way valve is arranged between the hydraulic control three-way valve and the external multi-way valve, and a connecting port P2 is arranged at the connecting position of the hydraulic control three-way valve and the second one-way valve.
As a preferable technical scheme of the invention, a first one-way valve is arranged between the hydraulic control three-way valve and the three-position four-way electric proportional valve, and a connecting port P1 is arranged at the joint of the hydraulic control three-way valve and the first one-way valve.
As a preferable technical scheme of the invention, the hydraulic control three-way valve, the second throttle valve and the overflow valve form a priority valve system.
As a preferable technical scheme of the invention, the first shuttle valve, the first throttle valve and the third throttle valve form a priority control oil path.
As a preferable technical scheme of the invention, the first shuttle valve, the first throttle valve and the second shuttle valve form a displacement control oil way of the variable pump.
As a preferable technical scheme of the invention, the first one-way sequence valve and the second one-way sequence valve are both connected with the steering mechanism.
As a preferable technical scheme of the invention, the oil return of the external multi-way valve is connected with an oil tank.
Compared with the prior art, the invention has the beneficial effects that: the hydraulic valve set of the unmanned agricultural machine is reasonable in design, compact in structure and small in occupied space in use, and the functions of steering priority are realized by adopting the load feedback variable pump for supplying oil and the hydraulic control three-way valve for controlling the flow direction of liquid, so that the safety is ensured without losing the direction when the agricultural machine works; the load feedback variable pump receives the load feedback signal, supplies oil and pressure according to the requirement, has low energy consumption and good economy, and is particularly suitable for agricultural equipment with urgent energy conservation requirements; the three-position four-way electric proportional valve is adopted, an external electric control system is used for providing steering signals, controlling the flow and the direction of fluid, further controlling the steering speed and the steering angle of the agricultural machine, and the three-position four-way electric proportional valve is particularly suitable for steering systems of unmanned, remote control driving and auxiliary driving agricultural machines, and is high in stability and good in repeatability, and steering and deviation correcting angles are accurately controlled according to positioning information.
Drawings
Fig. 1 is a schematic diagram of the principle of the present invention.
In the figure: the hydraulic control system comprises 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 first one-way valve 7, a second one-way valve 8, a hydraulic control three-way valve 9, a second throttle valve 10, an overflow valve 11, a third throttle valve 12, a 13 variable pump, a 14 variable control mechanism and a 15 variable control valve.
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 apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments (for convenience of description and understanding, the description is below with the left side of fig. 1 as the left side). All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: the hydraulic valve group of the 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 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 pump 13 is connected with the hydraulic control three-way valve 9 through the oil inlet port P, the oil outlet of the hydraulic control three-way valve 9 is respectively connected with the oil inlets of an external multi-way valve, the three-position four-way electric 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-position four-way electric proportional valve 6, a connecting port P1 is arranged at the joint 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 the external multi-way valve, the arrangement of the first one-way valve 7 and the second one-way valve 8 effectively avoids the mutual interference of working and steering oil ways, avoids the impact of pressure fluctuation on the variable pump 13, is connected with an oil tank by external multi-way valve oil return, the connecting part of the hydraulic 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 three-way valve 9 and an oil return port T, the oil tank is connected with the oil tank by the oil return port T, 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, oil inlets of the first one-way sequence valve 1 and the second one-way sequence valve 3 are both connected with an 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 running direction is unchanged when the hydraulic oil in the steering executing mechanism is locked when no steering requirement is received, the direction adjustment is reduced, straight running is ensured, the oil outlet of the first shuttle valve 2 is connected with the oil inlet of the first throttle valve 4, the oil outlet of the first throttle valve 4 is respectively connected with the oil inlets of the second shuttle valve 5, the overflow valve 11 and the third throttle valve 12, the oil outlet of the first throttle valve 4 is 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 multiway valve and is multiway valve load feedback pressure oil Ls1 at the joint of the two, the oil outlet of the second shuttle valve 5 is connected with a variable control valve 15, the pilot operated 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 way, the first shuttle valve 2, the first throttle valve 4 and the second shuttle valve 5 form a variable pump 13 displacement control oil way, the input end of the three-position four-way electric proportional valve 6 is electrically connected with the output end of an external electric control system, the hydraulic steering system is reasonable in design, the structure is compact, the occupied space is small in use, and the automatic steering and the steering can be realized when the steering is realized at the sufficient and the steering flow is preferred; the on-demand oil supply and pressure supply are realized, and the variable pump 13 has zero flow and zero power consumption when the steering and hydraulic output do not work.
When the steering and hydraulic output do not work, the zero flow and the zero power consumption are achieved: under the condition that no steering is carried out and no hydraulic pressure is output, the pressure oil output by the variable pump 13 pushes the variable control valve 15 to move leftwards, larger values in Ls1 and Ls2 flow back to the oil tank through Ls1 and Ls2, so that the variable control valve works in 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, the variable displacement pump 13 rotates, but the power consumption is zero, that is, the power consumption is zero when no steering is performed and no hydraulic pressure is output, and Ls1 is communicated with the oil tank through the hydraulic pressure output multi-way valve when the hydraulic pressure output multi-way valve is not operated.
Steering is accurate: taking right turning as an example, an external electric control system sends steering information to the three-position four-way electric proportional valve 6 to enable the three-position four-way electric proportional valve 6 to work at the right position, a steering oil way is connected, hydraulic oil output by the variable pump 13 enters the three-position four-way electric 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 jacked up by the oil inlet pressure of the second one-way sequence valve 3, and oil returns from the first one-way sequence valve to an oil return port T through the three-position four-way electric proportional valve 6;
The external electric control system receives a steering signal, outputs a steering demand signal after processing, controls the opening degree of the three-position four-way electric proportional valve 6, the flow of the steering signal can be from zero to the maximum value, the steering mechanism feeds back the steering angle to the external electric control system, and the external electric control system controls the opening degree of the three-position four-way electric proportional valve according to the deviation signal until reaching the target angle, so that accurate steering according to the requirement is realized;
The first shuttle valve 2 selects a first one-way sequence valve 1 and a second one-way sequence valve 3, the pressure of the oil inlet end of the first one-way sequence valve 3 is high and is transmitted to the first throttle valve 4, the small-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 Ls1 and Ls2 of the external multi-way valve and is transmitted to the variable control valve 15, the pressure of the oil inlet pressure of the variable control valve 15 and the oil pressure of the oil inlet port P are balanced under the action of the spring force of the side, if the oil pressure of the oil inlet port P rises, 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 variable control mechanism to move rightwards, the displacement of the variable pump 13 is reduced, and the oil supply according to the requirement is realized;
The other high-pressure oil Ls2 flows to a third throttle valve 12 and an overflow valve 11, the overflow valve 11 is used for limiting the highest steering pressure, and the third throttle valve 12 controls the oil inlet and outlet flow of the hydraulic control three-way valve 9 during steering, further controls the moving speed of the hydraulic control three-way valve 9, and finally controls the steering speed.
Steering and hydraulic output work, steering priority: when the hydraulic output works and the steering does not work, the valve core of the hydraulic control three-way valve 9 receives hydraulic thrust force of the P1 port, which is acted on the left side by control oil of the second throttle valve, and simultaneously receives resultant force generated by right side spring force and control oil thrust force, the control oil flows into an oil tank through the third throttle valve 12, and under the action of the left side thrust force, the valve core is pushed to move right, and the hydraulic control three-way valve 9 supplies oil to an external multi-way valve;
When the steering is required, the valve core is pushed to move left under the combined action of the thrust force and the spring force generated by the right side Ls2, so that the steering priority is ensured;
When the steering and hydraulic output work simultaneously and the variable pump 13 is full in oil supply, the hydraulic control three-way valve 9 is in a certain middle position 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 the 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 full, 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 understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein 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: 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 electric proportional valve (6), a hydraulic 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 three-way valve (9) through the oil inlet port P, an oil outlet of the hydraulic three-way valve (9) is respectively connected with an oil inlet of an external multi-way valve, the three-position four-way electric proportional valve (6) and the oil return port T, the oil return port T is connected with an oil tank, the first one-way sequence valve (1) is connected with the second one-way sequence valve (3) through a hydraulic pipeline, an oil inlet of the first one-way sequence valve (1) and an oil inlet port P are respectively connected with an oil inlet of the first shuttle valve (2), an oil outlet of the first throttle valve (4) is connected with an oil inlet of the first throttle valve (4), an oil outlet of the first throttle valve (4) is connected with an oil inlet of the load (4) of the first throttle valve (4), the overflow valve (11) is connected with the 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 and is used for feeding back pressure oil Ls1 for the load of the multi-way valve at the joint of the two, the oil outlet of the second shuttle valve (5) is connected with the variable control valve (15), and the input end of the three-position four-way electric proportional valve (6) is electrically connected with the output end of an external electric control system.
2. The hydraulic valve bank of an unmanned agricultural machine of claim 1, wherein: a second one-way valve (8) is arranged between the hydraulic control three-way valve (9) and the external multi-way valve, and the joint of the hydraulic control three-way valve (9) and the second one-way valve (8) is a connection port P2.
3. The hydraulic valve bank of an unmanned agricultural machine of 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 the joint of the hydraulic control three-way valve (9) and the first one-way valve (7) is a connection port P1.
4. The hydraulic valve bank of an unmanned agricultural machine of claim 1, wherein: the pilot-operated three-way valve (9), the second throttle valve (10) and the overflow valve (11) form a priority valve system.
5. The hydraulic valve bank of an unmanned agricultural machine of claim 1, wherein: the first shuttle valve (2), the first throttle valve (4) and the third throttle valve (12) form a priority control oil way.
6. The hydraulic valve bank of an unmanned agricultural machine of claim 1, wherein: the first shuttle valve (2), the first throttle valve (4) and the second shuttle valve (5) form a displacement control oil way of the variable pump (13).
7. The hydraulic valve bank of an unmanned agricultural machine of claim 1, wherein: the first one-way sequence valve (1) and the second one-way sequence valve (3) are connected with the steering mechanism.
8. The hydraulic valve bank of an unmanned agricultural machine of claim 1, wherein: and the oil return 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 CN110594222A (en) | 2019-12-20 |
| CN110594222B true CN110594222B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910819435.1A Active CN110594222B (en) | 2019-08-31 | 2019-08-31 | Hydraulic valve group of unmanned agricultural machinery |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001323902A (en) * | 2000-05-16 | 2001-11-22 | Hitachi Constr Mach Co Ltd | Hydraulic driven device |
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2019
- 2019-08-31 CN CN201910819435.1A patent/CN110594222B/en active Active
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