CN117469221A - Control system and control method for damping and buffering of header of combine harvester - Google Patents

Control system and control method for damping and buffering of header of combine harvester Download PDF

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Publication number
CN117469221A
CN117469221A CN202311232328.1A CN202311232328A CN117469221A CN 117469221 A CN117469221 A CN 117469221A CN 202311232328 A CN202311232328 A CN 202311232328A CN 117469221 A CN117469221 A CN 117469221A
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CN
China
Prior art keywords
valve
header
oil
control system
energy accumulator
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.)
Pending
Application number
CN202311232328.1A
Other languages
Chinese (zh)
Inventor
杨震
武小伟
胡德利
张树岗
王志浩
孟先程
丁爽爽
刘江汉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weichai Lovol Intelligent Agricultural Technology Co Ltd
Original Assignee
Weichai Lovol Intelligent Agricultural Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Weichai Lovol Intelligent Agricultural Technology Co Ltd filed Critical Weichai Lovol Intelligent Agricultural Technology Co Ltd
Priority to CN202311232328.1A priority Critical patent/CN117469221A/en
Publication of CN117469221A publication Critical patent/CN117469221A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D47/00—Headers for topping of plants, e.g. stalks with ears
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/021—Installations or systems with accumulators used for damping
    • 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
    • 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
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005—Fault detection or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

The invention relates to a control system and a control method for damping and buffering of a header of a combine harvester. The control system comprises an electromagnetic reversing valve, a throttle valve, a one-way valve, a header oil cylinder and an energy accumulator, wherein the electromagnetic reversing valve, the throttle valve and the one-way valve are respectively connected in series with an oil way, the oil ways where the electromagnetic reversing valve, the throttle valve and the one-way valve are arranged are connected in parallel, one end of the oil way after being connected in parallel is connected with the header oil cylinder, the other end of the oil way after being connected in parallel is connected with the energy accumulator, one end of the oil way after being connected in parallel is also connected with an oil source through a pipeline, the pipeline is provided with the control valve, the electromagnetic reversing valve is connected with the control system of the harvester, and the control system is used for adjusting the on-off electricity reversing state of the electromagnetic reversing valve according to the running speed of the harvester. The advantages are that: the vibration reduction and buffering action speed of the energy accumulator can be automatically adjusted according to the change of the speed of the grain harvester or the change of the operation mode change-over switch of the cab in the operation and transfer processes of the grain harvester, and meanwhile, the driving comfort of drivers in different operation modes and the high efficiency of header operation are ensured.

Description

Control system and control method for damping and buffering of header of combine harvester
Technical Field
The invention relates to the technical field of agricultural machinery equipment, in particular to a control system and a control method for damping and buffering of a header of a combine harvester.
Background
In recent years, the modern construction result of the agricultural equipment in China is remarkable, and the important innovation breaks through a new period. The method is a large agricultural country, has wide grain planting area and various types, and provides an important opportunity for the development of an automatic and intelligent harvester. However, at present, compared with the advanced combine harvester abroad, the combine harvester in China still has a plurality of problems and disadvantages in terms of automation and intelligence.
When harvesting, the header needs to keep a certain height with the ground to meet the requirement of consistent stubble harvesting, operators need to pay attention to fluctuation of the ground in front of the harvesting operation at any time, and the posture of the header is regulated at any time according to the ground condition, so that the header is required to respond quickly. Meanwhile, when the harvester transfers work, the vibration of the header can be transmitted to the cab when the harvester bumps the road surface, so that the driver feels uncomfortable in the driving process. The traditional processing mode can be added with an energy accumulator to solve the problem, but no automatic adjusting mode exists, two driving modes cannot be considered at the same time, and the intelligent control system is limited to one working mode.
In view of domestic requirements on driving feeling of the combine harvester, the driving comfort and harvesting efficiency are improved, the invention aims at a header energy accumulator vibration reduction and buffering control system and an automatic control method, and the vibration reduction and buffering action speed of the energy accumulator is automatically adjusted according to the change of the vehicle speed or the change of the operation mode of a cab in the whole vehicle working process, so that additional operation is not needed, and two operation modes can be simultaneously considered.
Disclosure of Invention
The invention aims to provide a control system and a control method for damping and buffering of a header of a combine harvester, and the defects of the prior art are effectively overcome.
The technical scheme for solving the technical problems is as follows:
a control system for damping and buffering of a header of a combine harvester comprises an electromagnetic directional valve, a throttle valve, a one-way valve, a header oil cylinder and an energy accumulator, wherein the electromagnetic directional valve, the throttle valve and the one-way valve are respectively connected with an oil way in series, the oil ways where the three are arranged are connected in parallel, one end of the oil way after being connected in parallel is connected with the header oil cylinder, the other end of the oil way after being connected with the energy accumulator is connected with an oil source through a pipeline, the pipeline is provided with the control valve, the electromagnetic directional valve is connected with a control system of the combine harvester, and the control system is used for adjusting the on-off electricity switching state of the electromagnetic directional valve according to the running speed of the combine harvester.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the electromagnetic directional valve is a two-position two-way electromagnetic directional valve.
Further, the two header cylinders are respectively connected with one end of the oil path after being connected in parallel.
Further, the control valve is a shut-off valve.
Further, the energy accumulator is provided with a plurality of energy accumulators and is respectively connected with the other ends of the oil paths after being connected in parallel.
Further, the accumulator is provided with three
Further, the other end of the oil path after parallel connection is connected with a pressure measuring device.
The beneficial effects of the invention are as follows: the self-adaptive vibration reduction buffer function of the energy accumulator can be realized, and the driving comfort of a driver is ensured.
Also provided is a control method for damping and buffering of a header of a combine harvester, comprising:
if the running speed of the harvester is detected to be smaller than or equal to a set value, controlling the electromagnetic reversing valve to be electrified and reversed, wherein the header oil cylinder is communicated with the energy accumulator through the throttle valve, and the buffer action of the energy accumulator on the header is limited by the throttle valve;
or the running speed of the harvester is detected to be smaller than or equal to a set value and is in a pit passing working condition, the electromagnetic reversing valve is electrically reversed, the header oil cylinder is communicated with the energy accumulator through the throttle valve, the energy accumulator is limited by the throttle valve in buffering action of the header, the header oil cylinder is pulled out due to inertia action, and the energy accumulator supplements the header oil cylinder through the one-way valve;
or if the running speed of the harvester is detected to be greater than the set value, controlling the electromagnetic directional valve to lose electricity, and communicating the header oil cylinder with the energy accumulator through the electromagnetic directional valve, the throttle valve and the one-way valve.
The beneficial effects are that: the vibration reduction and buffering action speed of the energy accumulator can be automatically adjusted according to the change of the speed of the grain harvester or the change of the operation mode change-over switch of the cab in the operation and transfer processes of the grain harvester, and meanwhile, the driving comfort of drivers in different operation modes and the high efficiency of header operation are ensured.
Drawings
Fig. 1 is a schematic structural view of a control system for damping and buffering a header of a combine harvester according to the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. an electromagnetic reversing valve; 2. a throttle valve; 3. a one-way valve; 4. a header oil cylinder; 5. an accumulator.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1
As shown in fig. 1, the control system for damping and buffering of a header of a combine harvester in this embodiment includes an electromagnetic directional valve 1, a throttle valve 2, a check valve 3, a header cylinder 4 and an energy accumulator 5, where the electromagnetic directional valve 1, the throttle valve 2 and the check valve 3 are respectively connected in series with oil paths, the oil paths where the three are located are connected in parallel, one end of the oil path after parallel connection is connected with the header cylinder 4, the other end of the oil path after parallel connection is connected with the energy accumulator 5, one end of the oil path after parallel connection is also connected with an oil source through a pipeline, a control valve is arranged on the pipeline, the electromagnetic directional valve 1 is connected with a control system of the harvester, and the control system is used for adjusting the on-off switching state of the electromagnetic directional valve 1 according to the running speed of the harvester. Wherein the control system is a control system of the harvester.
The main oil inlet and the oil outlet of the electromagnetic reversing valve 1 are respectively connected in series on corresponding oil paths, the throttle valve 2 and the one-way valve 3 are respectively connected in series on the corresponding oil paths, and the three paths of oil paths are connected in parallel. Part of oil from an oil source enters two header oil cylinders 4, the other part of the oil passes through the electromagnetic directional valve 1 and/or the throttle valve 2 to the energy accumulator 5, and the energy accumulator 5 additionally supplements the header oil cylinders 4 through the one-way valve 3 when needed, and the concrete control method is as follows:
if the running speed of the harvester is detected to be smaller than or equal to a set value (an operation mode, specifically, the running speed can be adjusted to the operation mode through a control switch in a control system), the electromagnetic reversing valve 1 is controlled to be electrified and reversed, the header oil cylinder 4 is communicated with the energy accumulator 5 through the throttle valve 2, the buffer action of the energy accumulator 5 on the header is limited by the throttle valve 2, the header is more stable in posture and quicker in action, and the consistency of the stubble cutting height can be effectively ensured;
or detecting that the running speed of the harvester is smaller than or equal to a set value (an operation mode is specifically adjusted to be the operation mode through a control switch in a control system), and is in a pit-passing working condition, the electromagnetic reversing valve 1 is electrified and reversed, the header oil cylinder 4 is communicated with the energy accumulator 5 through the throttle valve 2, the buffer effect of the energy accumulator 5 on the header is limited by the throttle valve 2, the header oil cylinder 4 is pulled out due to the inertia effect, the energy accumulator 5 supplements the header oil cylinder 4 through the one-way valve 3, so that the phenomenon of sucking air of the header oil cylinder 4 is avoided, and the header oil cylinder 4 and an oil supply device (oil source) can be damaged due to long-time effect;
or the running speed of the harvester is detected to be greater than a set value (a transition mode is particularly adjusted to be the transition mode through a control switch in a control system), the electromagnetic directional valve 1 is controlled to lose power, the energy accumulator 5 has an obvious buffering effect on the header, the header buffering effect is more obvious in the transition transportation process of the combine harvester, the impact is small, and the driving comfort is fully ensured. The header oil cylinder 4 is communicated with the energy accumulator 5 through the electromagnetic reversing valve 1, the throttle valve 2 and the one-way valve 3.
In this embodiment, the aperture of the throttle valve 2 may be calibrated according to the sizes of the header cylinders 4.
In this embodiment, the electromagnetic directional valve 1 adopts the existing two-position two-way electromagnetic directional valve, and the specific model is flexibly and reasonably adapted according to the actual use requirement.
Preferably, the header oil cylinders 4 are provided with two cylinders and are respectively connected with one end of the oil path after being connected in parallel.
In this embodiment, the control valve adopts the existing stop valve, and the specific model is flexible and reasonable according to the actual use requirement. The supplementary ones are: one end of the parallel oil path is connected with an oil source through a stop valve, and when the header oil cylinder 4 needs to be lifted, the oil source supplies oil, and the stop valves in other states are closed.
In this embodiment, the accumulator 5 is provided in plurality and is connected to the other end of the oil passage after being connected in parallel. The number of connections of the accumulator 5 may be determined according to actual use requirements, which will not be described in detail herein.
In this embodiment, the other end of the oil path after parallel connection is connected with a pressure measuring device (denoted by M in the figure), and the pressure measuring device is connected to a control system, so that safety monitoring of the oil pressure in real time can alert an operator in an alarm mode if the oil pressure is too high or too low.
In this embodiment, the pressure measuring device may be a product of the existing technologies such as the existing electronic pressure gauge, and specific models may be flexibly and reasonably configured according to actual use requirements, which is not described herein.
In the embodiment, the whole control system can reduce the operation of a driver, realize the automatic adjustment of buffering and vibration reduction under different driving working conditions, improve the riding comfort and improve the efficiency of harvesting operation. And when the driver changes the transition mode, the program can be automatically adjusted according to the speed of the vehicle, and the whole automatic control adjustment can be realized.
Example 2
Based on the embodiment 1, the original electromagnetic directional valve 1 and the throttle valve 2 are replaced with two-position two-way throttle type electromagnetic directional valves (which belong to the products of the prior art and are not described here in detail).
Otherwise, the same as in example 1 was conducted.
Example 3
On the basis of embodiment 1, a control valve group is added, the control valve group is provided with a total oil inlet, two branch oil ports and a plurality of oil outlets, wherein the total oil inlet is connected with an oil source through a pipeline (see an A1 port in fig. 1), the two branch oil ports are respectively and correspondingly connected with one ends (see an A2 port and an A3 port in fig. 1) of the header oil cylinder 4 and the oil paths after parallel connection, the plurality of oil outlets are respectively connected with the other ends of the oil paths after parallel connection and the corresponding energy storages 5 (see S1, S2 and S3 in fig. 1), and three energy storages 5 are optimally arranged in the embodiment.
Otherwise, the same as in example 1 was conducted.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (8)

1. A control system for combine header shock attenuation buffering, its characterized in that: including electromagnetic directional valve (1), choke valve (2), check valve (3), header hydro-cylinder (4) and energy storage ware (5), electromagnetic directional valve (1), choke valve (2) and check valve (3) establish ties respectively have the oil circuit, and the oil circuit at three place is parallelly connected, and the one end of the oil circuit after the parallel connection is connected header hydro-cylinder (4), the other end is connected energy storage ware (5), the one end of the oil circuit after the parallel connection is still through the pipeline connection oil source, and is equipped with the control valve on this pipeline, electromagnetic directional valve (1) are connected the control system of harvester, control system is used for adjusting according to the travel speed of harvester the break-make switching-over state of electromagnetic directional valve (1).
2. A control system for vibration damping cushioning of a combine header according to claim 1, wherein: the electromagnetic reversing valve (1) is a two-position two-way electromagnetic reversing valve.
3. A control system for vibration damping cushioning of a combine header according to claim 1, wherein: the cutting table oil cylinders (4) are arranged in two and are respectively connected with one end of the oil path after being connected in parallel.
4. A control system for vibration damping cushioning of a combine header according to claim 1, wherein: the control valve is a stop valve.
5. A control system for vibration damping cushioning of a combine header according to claim 1, wherein: the energy accumulator (5) is provided with a plurality of energy accumulators and is respectively connected with the other end of the oil path after being connected in parallel.
6. A control system for vibration dampening of a combine header as defined in claim 5, wherein: the energy accumulator (5) is provided with three.
7. A control system for vibration damping cushioning of a combine header according to claim 1, wherein: the other end of the oil path after parallel connection is connected with a pressure measuring device.
8. A control method of a control system for a combine header damping buffer according to any one of claims 1 to 7, comprising:
if the running speed of the harvester is detected to be smaller than or equal to a set value, controlling the electromagnetic reversing valve (1) to obtain electricity for reversing, wherein the header oil cylinder (4) is communicated with the energy accumulator (5) through the throttle valve (2), and the buffer effect of the energy accumulator (5) on the header is limited by the throttle valve (2);
or the running speed of the harvester is detected to be smaller than or equal to a set value and is in a pit passing working condition, the electromagnetic reversing valve (1) is electrified and is in reversing, the header oil cylinder (4) is communicated with the energy accumulator (5) through the throttle valve (2), the buffer effect of the energy accumulator (5) on the header is limited by the throttle valve (2), the header oil cylinder (4) is pulled out due to the inertia effect, and the energy accumulator (5) supplements the header oil cylinder (4) through the one-way valve (3);
or when the running speed of the harvester is detected to be greater than a set value, controlling the electromagnetic directional valve (1) to lose electricity, and communicating the header oil cylinder (4) with the energy accumulator (5) through the electromagnetic directional valve (1), the throttle valve (2) and the one-way valve (3).
CN202311232328.1A 2023-09-22 2023-09-22 Control system and control method for damping and buffering of header of combine harvester Pending CN117469221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311232328.1A CN117469221A (en) 2023-09-22 2023-09-22 Control system and control method for damping and buffering of header of combine harvester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311232328.1A CN117469221A (en) 2023-09-22 2023-09-22 Control system and control method for damping and buffering of header of combine harvester

Publications (1)

Publication Number Publication Date
CN117469221A true CN117469221A (en) 2024-01-30

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ID=89632062

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311232328.1A Pending CN117469221A (en) 2023-09-22 2023-09-22 Control system and control method for damping and buffering of header of combine harvester

Country Status (1)

Country Link
CN (1) CN117469221A (en)

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