CN112483488A - Electrically controlled hydraulic system and hydraulic drive method - Google Patents

Electrically controlled hydraulic system and hydraulic drive method Download PDF

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Publication number
CN112483488A
CN112483488A CN202010324371.0A CN202010324371A CN112483488A CN 112483488 A CN112483488 A CN 112483488A CN 202010324371 A CN202010324371 A CN 202010324371A CN 112483488 A CN112483488 A CN 112483488A
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CN
China
Prior art keywords
valve
hydraulic
oil
controller
control
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Pending
Application number
CN202010324371.0A
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Chinese (zh)
Inventor
侯跃军
吴迪
姚远
程昕
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FJ Dynamics Technology Co Ltd
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FJ Dynamics Technology Co Ltd
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Priority to CN202010324371.0A priority Critical patent/CN112483488A/en
Publication of CN112483488A publication Critical patent/CN112483488A/en
Priority to PCT/CN2021/088483 priority patent/WO2021213400A1/en
Pending legal-status Critical Current

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    • 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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B71/00—Construction or arrangement of setting or adjusting mechanisms, of implement or tool drive or of power take-off; Means for protecting parts against dust, or the like; Adapting machine elements to or for agricultural purposes
    • A01B71/02—Setting or adjusting mechanisms
    • 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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • 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
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • 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
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • 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
    • F15B21/087—Control strategy, e.g. with block diagram
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/857—Monitoring of fluid pressure systems

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention provides an electric control hydraulic system and a hydraulic driving method, wherein the electric control hydraulic system comprises a hydraulic assembly, a power output device, oil which can be transmitted between the hydraulic assembly and the power output device, and at least one operating device. The power output device is connected with the hydraulic assembly in a conducting manner, wherein the power output device outputs hydraulic power in a transmission manner of the oil, wherein the operating device is electrically connected with the controller, the operating device further comprises an operating element and at least one rotation angle sensor, the rotation angle sensor is arranged on the operating element, the rotation angle sensor is electrically connected with the controller, a rotation angle change value of the operating element is collected by the rotation angle sensor, and the controller controls the hydraulic assembly based on the rotation angle change value to control the transmission speed and the transmission direction of the oil.

Description

Electrically controlled hydraulic system and hydraulic drive method
Technical Field
The invention relates to a hydraulic device, in particular to an electric control hydraulic power device and a hydraulic driving method.
Background
The hydraulic power device of agricultural machinery is mainly used for adjusting agricultural implements according to external conditions or specific requirements in the use process, and the mode of adjusting agricultural implements is more commonly used: position adjustment, resistance adjustment, force position comprehensive adjustment and the like, and also can realize the adjustment of rapid ascending and descending of the agricultural implement under the non-tillage condition. The position adjustment is realized by controlling the relative position between the farm tool and the tractor through a position adjusting handle of the lifter or a limiting clamp of the oil cylinder so as to ensure that the farm tool works at the selected tilling depth.
At present, a lifter and an external output of an existing agricultural machine mostly adopt a mechanical force-position feedback mode and a manual operation handle mode, and an operator controls the hydraulic oil in a distributor to change direction by operating the axial displacement of a valve rod of the distributor, so that an oil cylinder of the agricultural machine is controlled, and actions such as rising, falling, neutral and the like of an agricultural implement are realized. The mechanical force-position feedback mechanism used in the agricultural machine of the prior art has large response delay of soil resistance received by the working tool of the agricultural machine, such as a cultivator, and the position of a lifter, and has slow execution speed and poor cultivation quality. Therefore, the mechanical force-position feedback structure in the prior art is difficult to operate, and the position of the handle needs to be manually adjusted in real time by the experience of a manipulator according to the vibration of the vehicle and the rotating speed of the engine so as to control the ascending and descending of the working tool of the agricultural machine with equal amplitude. On the other hand, the valve is controlled to be opened in a manual adjusting mode so as to adjust the flow rate to control the lifting speed. The flow in the hydraulic cylinder is difficult to accurately control and is often preset to a specific speed, but the speed adjusting process is often difficult to adapt to the terrain and the lifting height, namely the driving speed provided by the agricultural machinery lifter in the prior art is difficult to coordinate.
In addition, the lifting speed of the agricultural machinery hydraulic lifter in the prior art is raised or lowered in a constant speed mode according to the preset oil flow speed. That is to say, the agricultural machinery man can't adjust the speed of drive speed in good time according to the demand when operating agricultural machinery hydraulic pressure lifting mechanism. Generally, for safety reasons, the lifting speed of the agricultural hydraulic machine of the prior art is relatively slow, which inevitably causes the lifting and lowering speed of the agricultural machine to be relatively slow during operation.
The feedback mechanism and the operation setting mechanism of the hydraulic lifter in the prior art are mechanical parts, so that the action connection and transmission links are more, the mechanical structure is unstable in transmission and is easy to adjust and tedious, and the accuracy is low. The closed loop calculation capability of mechanical parts is poor, the system cannot be optimally matched, the overall performance of the agricultural machine is severely restricted, and the development of automation and intellectualization of the agricultural machine is not facilitated.
Disclosure of Invention
One of the main advantages of the present invention is to provide an electric control hydraulic system and a hydraulic driving method, wherein the electric control hydraulic system controls the operation of the electric control hydraulic system in an electric control manner, which is beneficial to reducing the operation difficulty of the hydraulic system.
Another advantage of the present invention is to provide an electro-hydraulic system and a hydraulic driving method, in which the electro-hydraulic system automatically controls a hydraulic oil flow rate according to an angle of a driving stroke, thereby controlling a driving speed of the electro-hydraulic system.
Another advantage of the present invention is to provide an electro-hydraulic system and a hydraulic driving method, in which the electro-hydraulic system automatically adjusts a hydraulic oil flow rate according to an angle of a driving stroke so as to be driven at a fast speed when the driving stroke of the electro-hydraulic system is large and to be driven at a slow speed when the driving stroke is small.
Another advantage of the present invention is to provide an electro-hydraulic system and a hydraulic driving method, wherein the electro-hydraulic system automatically adjusts the flow rate of the oil according to the driving stroke angle, which is beneficial to save time and improve the safety of the equipment.
Another advantage of the present invention is to provide an electro-hydraulic system and a hydraulic driving method, wherein the electro-hydraulic system obtains operation information of an operator and automatically controls a hydraulic action of the electro-hydraulic system according to the operation information, thereby simplifying operation difficulty of the hydraulic system.
Another advantage of the present invention is to provide an electro-hydraulic system and a hydraulic driving method, wherein the electro-hydraulic system includes a controller and at least one hydraulic assembly, and wherein the controller controls the hydraulic assembly based on the acquired operation control information, which facilitates automation of the agricultural machine.
Another advantage of the present invention is to provide an electric hydraulic system and a hydraulic driving method, wherein the electric hydraulic system further includes an operating handle and an angle sensor disposed at the operating handle, wherein the angle sensor detects angle information of the operating handle and transmits the detected angle information to the controller, so that the controller automatically controls the hydraulic assembly based on an operating angle of the handle, facilitating automation of the agricultural machine.
Another advantage of the present invention is to provide an electric control hydraulic system and a hydraulic driving method, wherein the electric control hydraulic system detects a driving angle of the hydraulic assembly during driving, and automatically controls a driving speed of the electric control hydraulic system based on data information of the detected driving angle, which is beneficial to intellectualization of the agricultural machinery.
Another advantage of the present invention is to provide an electric control hydraulic system and a hydraulic driving method, wherein the electric control hydraulic system detects hydraulic pressure of the hydraulic assembly during driving, and automatically controls lifting or lowering of the electric control hydraulic system based on data information of the detected hydraulic pressure, which is beneficial to intellectualization of the agricultural machinery.
Another advantage of the present invention is to provide an electro-hydraulic system and a hydraulic driving method, wherein the controller of the electro-hydraulic system can control the opening and closing of the control valves of the hydraulic assemblies with different flow rates so as to adjust the lifting or lowering speed of the hydraulic assemblies according to the driving angles of the hydraulic assemblies.
Another advantage of the present invention is to provide an electro-hydraulic system and a hydraulic driving method, wherein the electro-hydraulic system is suitable for agricultural machinery, wherein the electro-hydraulic system is simple to operate and reduces the skill level requirement of the driver of the agricultural machinery.
Another advantage of the present invention is to provide an electric control hydraulic system and a hydraulic driving method, wherein the electric control hydraulic system automatically detects the lifting height and the pressure value during the driving process of the agricultural machine, and controls the operation of the hydraulic assembly by the controller according to the detected detection data, so that the agricultural machine intelligently and fully automatically controls the operation device of the agricultural machine.
It is another advantage of the present invention to provide an electro-hydraulic system and hydraulic drive method in which the electro-hydraulic system can be powered hydraulically by external devices. That is, the hydraulic drive of the external device may be connected to the electrically controlled hydraulic system, which provides the external device with hydraulic kinetic energy.
Another advantage of the present invention is to provide an electric control hydraulic system and a hydraulic driving method, wherein the electric control hydraulic system automatically collects data information of agricultural machinery operation during a hydraulic operation process, and adjusts a working state of the electric control hydraulic system according to the collected data information, so that the electric control hydraulic system adapts to the current agricultural machinery operation of the agricultural machinery. The electric control hydraulic system is high in corresponding speed of executing actions according to the collected data information, and the operation quality of the agricultural machine when the electric control hydraulic system is used is improved.
Additional advantages and features of the invention will be set forth in the detailed description which follows and in part will be apparent from the description, or may be learned by practice of the invention as set forth hereinafter.
In accordance with one aspect of the present invention, the foregoing and other objects and advantages are achieved in an electrically controlled hydraulic system, comprising:
a hydraulic assembly;
a power take-off and an oil driveable between the hydraulic assembly and the power take-off, wherein the power take-off is communicably connected to the hydraulic assembly, wherein the power take-off outputs hydraulic power in the form of the transmission of the oil;
a controller, wherein the hydraulic assembly is electrically connected to the controller; and
and the operating device is electrically connected with the controller, the operating device further comprises an operating element and at least one rotation angle sensor, the rotation angle sensor is arranged on the operating element, the rotation angle sensor is electrically connected with the controller, and a rotation angle change value of the operating element is acquired by the rotation angle sensor, wherein the controller controls the hydraulic assembly based on the rotation angle change value so as to control the transmission speed and the transmission direction of the oil.
According to an embodiment of the present invention, the hydraulic assembly includes an oil tank, at least one oil pump, and at least one valve set, wherein the oil pump delivers the oil stored in the oil tank to the valve set, and the valve set is electrically connected to the controller, and the controller controls a transmission direction of the oil in the valve set.
According to an embodiment of the present invention, the valve set further includes an integration valve block, at least one electromagnetic overflow valve, at least one directional control valve, and at least one control valve, wherein the electromagnetic overflow valve, the directional control valve, and the control valve are electrically connected to the controller, and the controller controls the electrical conduction states of the electromagnetic overflow valve, the directional control valve, and the control valve, wherein when the directional control valve is energized, the directional control valve controls the flow direction of the oil, and when the controller controls the electrical conduction of the control valve, the oil in the valve set is transmitted to the power output device, and the power output device outputs hydraulic power.
According to an embodiment of the invention, the reversing valve comprises at least two reversing valve units, wherein the reversing valve units are connected in parallel with each other and are independently arranged on the integrated valve block.
According to an embodiment of the present invention, the reversing valve unit of the reversing valve is a voltage proportional reversing valve, and the controller controls a flow rate of the oil in the valve block by controlling a voltage value of the reversing valve unit.
According to an embodiment of the present invention, the valve block further comprises at least one adapter, wherein the adapter is communicably connected to the manifold block, the control valve controls the opening and closing of the adapter, and the manifold block transmits the oil to the power take-off through the adapter when the control valve is in conductive communication controlled by the controller.
According to an embodiment of the present invention, the control valve further includes a first control valve and a second control valve, wherein the first control valve and the second control valve are provided to the integration valve block, wherein the power output device outputs the driving force in a lifting manner by the oil when the first control valve is electrically conducted, and wherein the power output device outputs the driving force in a lowering manner by the oil when the second control valve is electrically conducted.
According to an embodiment of the present invention, the power output device includes at least one driving cylinder and at least one power output shaft, wherein the power output shaft is drivably connected to the driving cylinder, the valve set is communicably connected to the driving cylinder through the adaptor, when the first control valve is turned on, the oil drives the power output shaft to lift, and when the second control valve is turned on, the oil drives the power output shaft to descend.
According to an embodiment of the present invention, the valve block further includes at least one external hydraulic control valve and at least one external hydraulic adapter, wherein the external hydraulic control valve and the external hydraulic adapter are disposed on the integrated valve block, the external hydraulic control valve controls opening and closing of the external hydraulic adapter, the external hydraulic control valve is electrically connected to the controller, and the controller controls an electrical conduction state of the external hydraulic control valve, so that the external hydraulic adapter provides hydraulic kinetic energy to an external tool.
According to an embodiment of the present invention, the control system further comprises at least one angle sensor, wherein the angle sensor is disposed on the power output device, the angle sensor acquires a feedback angle α of the power output device, the controller derives an oil flow value Z delivered to the power output device by the valve group based on the feedback angle α, and the controller controls the reversing valve and the control valve based on the oil flow value Z and the feedback angle α.
According to an embodiment of the present invention, the controller determines the feedback angles α and β, where β is a predetermined value relationship, and if the feedback angle α is not greater than β, the controller generates voltage control information of a spool opening degree of the directional valve, where the spool opening degree of the directional valve corresponds to a rotational acceleration of the operating element, and if the feedback angle α > β, divides a flow value Z corresponding to the feedback angle α into an X flow section and a Y flow section, where Z is X + Y, α is β + γ, where β corresponds to the X flow section, γ corresponds to the Y flow section, generates voltage control information of the spool opening degree of the directional valve, and a flow speed of the oil of the Y flow section is greater than a flow speed of the oil of the X flow section.
According to an embodiment of the present invention, the hydraulic assembly further comprises at least one hydraulic sensor, wherein the hydraulic sensor is disposed at the valve block of the hydraulic assembly and is electrically connected to the controller, the hydraulic sensor detects oil pressure of the valve block and transmits the detected pressure data to the controller, and the controller controls the valve block of the hydraulic assembly based on the pressure data.
According to another aspect of the present invention, the present invention further provides a hydraulic driving method, wherein the hydraulic driving method includes the steps of:
(a) an electromagnetic overflow valve electrically connected with a valve group, wherein the electromagnetic overflow valve establishes the hydraulic pressure of the electric control hydraulic system;
(b) acquiring the rotation angle change of an operating element of an operating device, and obtaining a control signal based on the rotation angle change; and
(c) and at least one reversing valve and a control valve are electrically conducted based on the control signal so as to control the flow direction and the flow speed of the oil in the valve group, and the oil controls the driving direction and the driving speed of a power output device.
According to an embodiment of the present invention, in the step (b), the method further includes:
(b.1) the collected data information is transmitted to a controller, and the controller obtains the rotation acceleration of the operating element based on the collected rotation angle data information; and
(b.2) obtaining the flow speed required for controlling the oil liquid based on the rotation acceleration.
According to an embodiment of the present invention, the step (b) further comprises the steps of:
and acquiring a feedback angle alpha of the power output device, and obtaining a flow value Z of the oil liquid required by the power output device to move to a corresponding angle alpha.
According to an embodiment of the present invention, in the step (c), the controller controls a spool opening of the direction valve based on the detected feedback angle α and the corresponding flow value Z, and controls a flow direction and a flow value of the oil by the direction valve.
According to an embodiment of the present invention, the step (b) further comprises the steps of:
judging the relation between the feedback angle alpha and beta, wherein beta is a preset value, and if the feedback angle alpha is not more than beta, generating voltage control information of the valve core opening degree of the reversing valve, wherein the valve core opening degree of the reversing valve corresponds to the rotation acceleration of the operating element; and if the feedback angle alpha is larger than beta, dividing the flow value Z corresponding to the feedback angle alpha into an X flow section and a Y flow section, wherein Z is X + Y, and alpha is beta + gamma, beta corresponds to the X flow section, gamma corresponds to the Y flow section, generating voltage control information of the opening degree of a valve core of the reversing valve, and the flow speed of the oil liquid in the Y flow section is larger than that of the oil liquid in the X flow section.
According to an embodiment of the present invention, the step (c) further comprises the steps of:
controlling the reversing valve unit of the reversing valve to be electrically conducted, controlling the opening degree of a valve core of the reversing valve unit according to the angle change of the rotation angle sensor, and passing through the oil liquid of a Y flow section corresponding to gamma; and
and when the feedback angle reaches beta, controlling the reversing valve unit of the reversing valve to be electrically conducted, controlling the opening degree of a valve core of the reversing valve unit according to the angle change of the rotation angle sensor, and passing through the oil liquid of the X flow section corresponding to the beta, wherein the valve core of the reversing valve unit is slowly attached.
According to another aspect of the present invention, there is further provided an agricultural machine comprising:
an agricultural machinery host; and
an electro-hydraulic system, wherein the electro-hydraulic system is mounted to the agricultural machinery main frame, wherein the electro-hydraulic system further comprises:
a hydraulic assembly;
a power take-off and an oil driveable between the hydraulic assembly and the power take-off, wherein the power take-off is communicably connected to the hydraulic assembly, wherein the power take-off outputs hydraulic power in the form of the transmission of the oil;
a controller, wherein the hydraulic assembly is electrically connected to the controller; and
and the operating device is electrically connected with the controller, the operating device further comprises an operating element and at least one rotation angle sensor, the rotation angle sensor is arranged on the operating element, the rotation angle sensor is electrically connected with the controller, and a rotation angle change value of the operating element is acquired by the rotation angle sensor, wherein the controller controls the hydraulic assembly based on the rotation angle change value so as to control the transmission speed and the transmission direction of the oil.
Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the claims.
Drawings
FIG. 1 is a schematic view of an agricultural machine according to a first preferred embodiment of the present invention.
Fig. 2A is a schematic view of an electrically controlled hydraulic system of the agricultural machine according to the above preferred embodiment of the present invention.
Fig. 2B is a schematic view of another view of the electrically controlled hydraulic system of the agricultural machine according to the above preferred embodiment of the present invention.
Fig. 2C is a schematic view of another view of the electrically controlled hydraulic system of the agricultural machine according to the above preferred embodiment of the present invention.
Fig. 3A is a schematic view of a hydraulic assembly of the electrically controlled hydraulic system of the agricultural machine according to the above preferred embodiment of the present invention.
Fig. 3B is another schematic view of the hydraulic assembly of the electrically controlled hydraulic system of the agricultural machine according to the above preferred embodiment of the present invention.
Fig. 4 is a schematic operation diagram of an operating device of the electrically controlled hydraulic system of the agricultural machine according to the above preferred embodiment of the present invention.
Fig. 5 is a schematic view of a transmission of the electrically controlled hydraulic system of the agricultural machine according to the above preferred embodiment of the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
An agricultural machine according to a first preferred embodiment of the present invention is illustrated in the following description with reference to figure 1 of the accompanying drawings. The agricultural machine comprises an agricultural machine main body 100 and an electric control hydraulic system 200 carried on the agricultural machine main body 100, wherein the electric control hydraulic system 200 outputs hydraulic power, and the electric control hydraulic system 200 supports the operation of agricultural machine operation equipment, such as a cultivator, a plough, sowing equipment and the like; or the electric control hydraulic system 200 drives the agricultural machinery operation equipment to move. The electric control hydraulic system 200 is carried to the agricultural machinery main machine 100, wherein the agricultural machinery main machine 100 provides working electric energy required by the electric control hydraulic system 200 to drive the electric control hydraulic system 200 to output hydraulic kinetic energy. In the preferred embodiment of the present invention, the electrohydraulic system 200 is disposed at the rear end of the main frame 100, and is towed by the main frame 100 and supports the electrohydraulic system 200.
Referring to fig. 2A to 5 of the drawings in the specification, the electric control hydraulic system 200 of the agricultural machine according to the first preferred embodiment of the present invention is specifically explained. The electro-hydraulic control system 200 includes a hydraulic assembly 10, a controller 20, at least one connecting bracket 30, at least one power output device 40, and at least one oil 50 driven between the hydraulic assembly 10 and the power output device 40, wherein the hydraulic assembly 10 is electrically connected to the controller 20, and the controller 20 sends a control signal to the hydraulic assembly 10. The hydraulic assembly 10 receives control signals from the controller 20 and controls the transmission of oil 50 within the hydraulic assembly 10 based on the control signals. The power output device 40 is connected to the hydraulic assembly 10 in a conductive manner, and the hydraulic assembly 10 guides oil 50 to the power output device 40 based on the control signal, so that hydraulic power is output through the power output device 40; or the power output device 40 returns the oil 50 to the hydraulic assembly 10, and the power output device 40 is in a pressure relief state.
In the preferred embodiment of the present invention, the power output device 40 is provided to the connecting bracket 30, wherein the connecting bracket 30 is fixedly provided to the main agricultural machine 100. In other words, the main agricultural machine 100 tows and supports the electric control hydraulic system 200 through the connecting bracket 30. Preferably, in the preferred embodiment of the present invention, the hydraulic assembly 10 is disposed on the connecting bracket 30, and the hydraulic assembly 10 is fixed to the main agricultural machine 100 by the connecting bracket 30.
It should be noted that, in the preferred embodiment of the present invention, the controller 20 controls the transmission of the oil 50 in the hydraulic assembly 10 in an electrically controlled manner, so as to control the hydraulic power output by the power output device 40, which is beneficial to accurately control the hydraulic power output by the electrically controlled hydraulic system 200.
As shown in fig. 3A and 3B, the hydraulic assembly 10 includes an oil tank 11, at least one oil pump 12, and at least one valve set 13, wherein the oil pump 12 is communicably connected to the oil tank 11, the oil 50 stored in the oil tank 11 is pumped to the valve set 13 by the oil pump 12, the oil 50 that does not participate in hydraulic power in the valve set 13 can flow back to the oil tank 11, and the oil is stored in the oil tank 11. The hydraulic assembly 10 further includes at least one oil inlet pipe 101 and at least one oil outlet pipe 102, wherein the oil inlet pipe 101 communicates the oil pump 12 with the valve block 13, that is, the oil pump 12 pumps oil into the valve block 13 through the oil inlet pipe 101. The outlet line 102 communicates the valve block 13 with the oil tank 11, wherein the valve block 13 returns the oil 50 not participating in hydraulic pressure to the oil tank 11 through the outlet line 102.
It is worth mentioning that the oil inlet pipe 101 and the oil outlet pipe 102 of the hydraulic assembly 10 are hydraulic hoses or hard pipes. It is to be understood that the pipe types of the inlet pipe 101 and the outlet pipe 102 are merely exemplary and not limiting.
It should be noted that the oil pump 12 of the hydraulic assembly 10 is drivingly disposed on the main agricultural machinery 100, and the main agricultural machinery 100 drives the oil pump 12 to pump the oil 50 into the valve block 13. Preferably, in the preferred embodiment of the present invention, the oil pump 12 is a gear pump. It is to be understood that the manner in which the oil pump 12 is driven is by way of example only and not by way of limitation. Therefore, the oil pump 12 may also be implemented as other types of pump devices.
The valve block 13 is electrically connected to the controller 20 of the electro-hydraulic control system 200, wherein the controller 20 controls the opening and closing of the valve block 13, and the valve block 13 guides the transmission of the oil 50 between the valve block 13 and the power take-off 40. In detail, when the electro-hydraulic system 200 drives the ascending or descending motion, the controller 20 controls the valve set 13 of the hydraulic assembly 10 to introduce the oil 50 to the power output device 40, so that the power output device 40 provides hydraulic power upwards or downwards. When the electro-hydraulic system 200 is in a pressure relief state, the controller 20 controls the valve set 13 to lead out the oil 50 of the power output device 40.
The valve set 13 further includes an integrated valve block 131, at least one electromagnetic overflow valve 132 disposed on the integrated valve block 131, at least one direction switching valve 133, and at least one control valve 134, wherein the electromagnetic overflow valve 132, the direction switching valve 133, and the control valve 134 are electrically connected to the controller 20, and the controller 20 controls the opening and closing of the valve elements to control the transmission direction or the transmission speed of the oil 50. The integration valve block 131 is communicably connected to the oil pump 12 through the oil inlet pipe 101, wherein the oil pump 12 pumps the oil 50 in the oil tank 11 into the integration valve block 131. The integration valve block 131 is communicably connected to the oil tank 11 through the oil outlet pipe 102, and the oil 50 of the integration valve block 131 is returned to the oil tank 11 through the oil outlet pipe 102.
The electromagnetic overflow valve 132 is electrically connected to the controller 20, the controller 20 controls the electromagnetic overflow valve 132 to be turned on and off, and when the electrically controlled hydraulic system 200 needs to act, the controller 20 controls the electromagnetic overflow valve 132 to be turned on so as to enable the valve block 13 to establish a working pressure, wherein the oil pump 12 pumps the oil into the valve block 13; when the electronic control hydraulic system 200 is depressurized, the controller 20 controls the electromagnetic spill valve 132 to be powered off, and the oil 50 in the valve group 13 flows back to the oil tank 11.
The direction change valve 133 is provided to the integration valve block 131, and the direction change valve 133 is communicably connected to the controller 20, wherein the direction change valve 133 switches the transmission direction of the oil in the valve block 13 based on a control signal of the controller 20, thereby controlling the movement direction of the power output apparatus 40, such as the ascending movement, the descending movement, and the like of the power output apparatus. The direction valve 133 is also used to control the flow rate of the oil 50 in the valve set 13, and thus the driving speed of the power output device 40, i.e. the speed of the power output device 40.
Accordingly, the direction switching valve 133 further includes at least two direction switching valve units 1331, wherein the direction switching valve units 1331 are connected in parallel with each other and are independently disposed on the integrated valve block 131, and the direction switching valve units 1331 control the transmission direction and the transmission speed of the oil 50 in the integrated valve block 131. Wherein the direction valve unit 1331 is electrically connected to the controller 20, and the controller 20 controls the operation state of the direction valve unit 1331, such as voltage, current value, etc.
It is worth mentioning that the controller 20 may control one or more of the directional valve units 1331 of the directional valve 133 to be activated to adjust the flow rate of the oil in the valve block 13 by opening the directional valve units 1331.
Preferably, in the preferred embodiment of the present invention, the direction valve unit 1331 of the valve group 13 may be, but is not limited to, a voltage proportional direction valve, that is, the valve spool opening size of the direction valve unit 1331 is related to the voltage value of the direction valve unit 1331, so that the flow rate of the control oil of the valve group 13 is adjusted according to the voltage proportion. In the preferred embodiment of the present invention, the controller 20 controls the flow direction and the flow speed of the oil in the valve block 13 by controlling the voltage value of the switching valve 133 and the polarity of the voltage.
The valve manifold 13 further includes at least one adapter 135, wherein the adapter 135 is connected to the manifold block 131, wherein the oil in the manifold block 131 flows to the power take-off 40 via the adapter 135. The control valve 134 controls the opening and closing of the adapter 135, wherein when the electro-hydraulic system 200 is actuated, the controller 20 electrically conducts the control valve 134, and the control valve 134 controls the opening of the adapter 135 to allow the oil 50 to flow from the integration valve block 131 to the power take-off 40. When the electro-hydraulic control system 200 is in a pressure relief state, the controller 20 de-energizes the control valve 134, wherein the control valve 134 controls the adapter 135 to close, thereby preventing the oil 50 from passing through.
The control valve 134 of the valve set 13 further includes a first control valve 1341 and a second control valve 1342, wherein the first control valve 1341 and the second control valve 1342 are respectively disposed in the integrated valve block 131 in a communication manner. The first control valve 1341 and the second control valve 1342 are electrically connected to the controller 20, respectively, and the controller 20 controls the operation states of the first control valve 1341 and the second control valve 1342. When the first control valve 1341 and the second control valve 1342 are in an electrically conductive state, the first control valve 1341 and the second control valve 1342 control at least one of the joints 135 to be conductive to allow the oil 50 in the integrated valve block 131 to flow to the power take-off 40 through the joint 135. Preferably, the first control valve 1341 and the second control valve 1342 may be, but are not limited to, an electromagnetic ball valve.
Preferably, in this preferred embodiment of the invention, the power take-off 40 is raised, lowered, neutral or floated by the hydraulic assembly 10. In other words, the hydraulic assembly 10 outputs the oil 50 to the power take-off 40, so that the power take-off 40 lifts the working device under the action of the oil 50; or the power output device 40 can lift the working device under the action of the oil liquid 50; or the power output device 40 is kept in a neutral state by the oil 50; or the power output device 40 may move up and down by the driving of the working device.
The hydraulic assembly 10 further includes a lift oil pipe 103 and a lower oil pipe 104, wherein the lift oil pipe 103 communicates with an adapter 135 of the valve block 13 to the power take-off 40, and wherein the first control valve 1341 controls the opening and closing of the adapter 135. When the controller 20 opens the first control valve 1341, the oil 50 in the integrated valve block 131 of the valve block 13 flows to the power take-off 40 via the adapter 135 and the riser pipe 103, wherein the power take-off 40 lifts the work device under the hydraulic pressure of the oil 50. The lowering service line 104 communicates with an adapter 135 of the valve block 13 to the power plant 40, wherein the second control valve 1342 controls the opening and closing of the adapter 135. When the controller 20 opens the second control valve 1342, the oil 50 in the integrated valve block 131 of the valve block 13 flows to the power take-off 40 via the adapter 135 and the lowering oil pipe 104, wherein the power take-off 40 lowers the work device under the hydraulic pressure of the oil 50.
As shown in fig. 4 and 5, the power output device 40 includes at least one driving cylinder 41 and at least one power output shaft 42, wherein the power output shaft 42 is connected to the driving cylinder 41 in a driving manner. The valve group 13 of the hydraulic assembly 10 transmits the oil 50 to the driving cylinder 41 of the power output device 40, wherein the driving cylinder 41 drives the power output shaft 42 to move up and down under the action of the oil 50. It can be understood that the driving cylinder 41 of the power output device 40 converts the hydraulic acting force into a driving acting force for driving the power output shaft 42 to move in the vertical direction, and the power output shaft 42 drives the working device to ascend, descend or keep in a stationary state.
Preferably, in the preferred embodiment of the present invention, the number of the driving cylinders 41 of the power output device 40 is two, wherein the driving cylinders 41 are symmetrically and fixedly arranged at two sides of the connecting bracket 30, and each driving cylinder 41 drives the power output shaft 42 to move under the supporting action of the connecting bracket 30. It is to be understood that the number of the drive cylinders 41 of the power output apparatus 40 in the preferred embodiment of the present invention is merely exemplary and not limited thereto.
More preferably, the driving cylinder 41 is a double-acting driving cylinder, that is, when the oil 50 is transferred to the driving cylinder 41, the driving cylinder 41 drives the power output shaft 42 to move upwards in a lifting manner; or the driving cylinder 41 drives the power take-off shaft 42 to move downward in a descending manner.
Each driving oil cylinder 41 is communicated with the adapter 135 of the valve group 13 through the lifting action pipeline 103 or the descending action pipeline 104, that is, the valve group 13 outputs the oil liquid 50 to the driving oil cylinder 41 through the lifting action pipeline 103 or the descending action pipeline 104, and the driving oil cylinder 41 converts the hydraulic acting force into a driving acting force for driving the power output shaft 42 to move.
The driving cylinder 41 further includes a cylinder 411 and a driving rod 412 telescopically disposed on the cylinder 411, wherein the valve set 13 guides oil into the cylinder 411, and the driving rod 412 is driven by the pressure of the oil to telescopically move. The power take-off shaft 42 is drivingly connected to the driving rod 412 of the driving cylinder 41, and the power take-off shaft 42 is driven to move up and down by the driving rod 412 under the hydraulic pressure of the oil 50.
The lifting pipe 103 is conductively connected to the lower end of the cylinder 411, and when the oil 50 is output to the lower end of the cylinder 411 through the lifting pipe 103, the oil 50 in the cylinder 411 drives the driving rod 412 to move upwards under the hydraulic action, that is, the driving rod 412 extends outwards under the pressure of the oil. The descending pipe 104 is connected to the upper end of the cylinder 411 in a conductive manner, and when the oil 50 is output to the lower end of the cylinder 411 through the descending pipe 104, the oil in the cylinder 411 drives the driving rod 412 to move downward under the hydraulic action, that is, the driving rod 412 retracts to the cylinder 411 under the pressure of the oil 50.
It should be noted that the driving cylinder 41 of the power output device 40 is further conductively connected to the oil tank 11, and when the electric hydraulic system 200 is in a pressure relief state, the oil 50 in the driving cylinder 41 is introduced into the oil tank 11, so as to implement pressure relief of the driving cylinder 41.
The power take-off shaft 42 of the power take-off device 40 is drivingly provided to the connecting bracket 30, and the power take-off shaft 42 is driven to swing up and down by the drive rod 412 of the drive cylinder 41. Preferably, the power take-off shaft 42 is pivotably provided to the upper end of the connecting bracket 30 based on a rotating shaft, and the power take-off shaft 42 rotates up and down based on the rotating shaft when the driving cylinder 41 drives the power take-off shaft 42.
The power take-off shaft 42 further comprises a pivot shaft 421 and at least one swing link 422 extending outwardly from the pivot shaft 421, wherein the driving rod 412 of the driving cylinder 41 is drivingly connected to the swing link 422, and the swing link 422 is driven by the driving rod 412 to rotate based on the pivot shaft 421.
As shown in fig. 2A to 2C, the electro-hydraulic system 200 further includes at least one suspension assembly 60, wherein the suspension assembly is drivingly disposed on the power output device 40, and the suspension assembly 60 is driven by the power output device 40 to move up and down. An agricultural working device is drivingly provided to the suspension assembly 60, and the power of the power take-off 40 is transmitted by the suspension assembly 60 to the agricultural working device, such as a plow, a tilling implement, or the like. The suspension unit 60 is provided to the connecting bracket 30, the suspension unit 60 is supported by the connecting bracket 30, and the agricultural implement is supported and suspended by the suspension unit 60. Preferably, in the preferred embodiment of the present invention, the suspension assembly 60 is implemented as a three-point suspension assembly, it being understood that the specific implementation of the suspension assembly 60 is merely exemplary and not limiting herein.
The suspension assembly 60 includes at least one transmission link 61, a transmission bracket 62 and at least one connecting member 63, wherein the transmission link 61 is capable of being connected to the power output shaft 42 in a transmission manner to the transmission bracket 62, and when the electrically controlled hydraulic system 200 ascends or descends, the power output shaft 42 drives the transmission link 61 and the transmission bracket 62 is driven by the transmission link 61 to move up and down. The transmission bracket 62 is pivotally disposed at the connection bracket 30, and the transmission link 61 drives the transmission bracket 62 to rotate based on the connection bracket 30. The connecting member 63 is pivotally connected to the transmission bracket 62 and the main agricultural machinery 100.
As shown in fig. 3A to 3B, the valve block 13 of the hydraulic assembly 10 further includes at least one external hydraulic control valve 136 and at least one external hydraulic adapter 137, wherein the external hydraulic control valve 136 is disposed on the integrated valve block 131, and the external hydraulic adapter 137 is communicably connected to the integrated valve block 131. The external hydraulic control valve 136 controls the opening and closing of the external hydraulic adapter 137. The hydraulic transmission of an external hydraulic tool pitch plow, tilling implement, etc. may be connected to the hydraulic assembly 10 by the external hydraulic adapter 137, i.e., the hydraulic assembly 10 may provide the oil 50 required for hydraulic power to the external hydraulic tool.
The external hydraulic control valve 136 is electrically connected to the controller 20, and the controller 20 controls the conduction state of the external hydraulic control valve 136. When the controller 20 switches on the external hydraulic control valve 136, the external hydraulic control valve 136 controls the external hydraulic adapter 137 to open, wherein the oil 50 in the integrated valve block 131 can be output to an external hydraulic tool through the external hydraulic adapter 137, and the external hydraulic tool is driven to work by the hydraulic assembly 10. Preferably, the external hydraulic control valve 136 may be, but is not limited to, an electro-proportional reversing valve.
Preferably, in the preferred embodiment of the present invention, the valve block 13 of the hydraulic assembly 10 is fixedly disposed on the connecting bracket 30, wherein the valve block 13 is located above the oil tank 11, so that the oil of the valve block 13 can flow back to the oil tank 11. The hydraulic assembly 10 further includes at least one fixing frame 14, and the valve set 13 is fixed to the connecting bracket 30 by the fixing frame 14.
As shown in fig. 2A to 2C, the controller 20 includes a control unit 21 and a plurality of communication cables 22, wherein the communication cables 22 electrically connect the control unit 21 to the hydraulic assembly 10, and the communication cables 22 transmit control signals of the control unit 21. The control unit 21 generates and transmits the control signal to the valve block 13 of the hydraulic assembly 10 based on the detected data information and the operator's operation information to control the hydraulic assembly 10 to output hydraulic power through the power output apparatus 40.
Preferably, in the preferred embodiment of the present invention, the Control Unit 21 of the controller 20 is implemented as an ECU (Electronic Control Unit), wherein the Control Unit 21 is provided to the main agricultural machinery 100 of the agricultural machinery, and the operation of the Control Unit 21 of the controller 20 is supported by the main agricultural machinery 100.
The electro-hydraulic system 200 further includes an operating device 70, wherein the operating device 70 is communicatively connected to the controller 20, and the operating device 70 transmits the operating information of the user to the controller 20. The controller 20 controls the hydraulic assembly 10 based on the operation information of the operation device 70, and hydraulic working power is transmitted from the power output device 40. The operating device 70 further comprises an operating element 71 and at least one rotation angle sensor 72, wherein the rotation angle sensor 72 is arranged on the operating element 71, and the rotation angle sensor 72 detects the rotation angle of the operating element 71. The rotation angle sensor 72 is electrically connected to the controller 20, and the rotation angle of the operation member 71 is transmitted to the controller 20 by the rotation angle sensor 72. The controller 20 controls the valve block 13 of the hydraulic unit 10 based on the rotational angle information collected by the rotational angle sensor 72.
Preferably, in the preferred embodiment of the present invention, the operation member 71 is implemented as an operation handle or knob device, and the rotation angle sensor 72 collects the rotation angle of the operation member 71 in real time when the user operates the operation member 71. As will be understood by those skilled in the art, the controller 20 automatically controls the opening of the valve block 13 of the hydraulic assembly 10 based on operator operation information, and thus controls the operation of the power take-off 40.
The electro-hydraulic control system 200 further includes at least one angle sensor 80, wherein the angle sensor 80 is disposed on the power output shaft 42 of the power output device 40, and the angle sensor 80 collects the rotation angle of the power output shaft 42 in real time. The angle sensor 80 is electrically connected to the control unit 21 of the controller 20, and the rotation angle of the power take-off shaft 42 is fed back by the angle sensor 80 in real time. The controller unit 21 of the controller 20 controls the point-on state of the valve group 13 of the hydraulic assembly 10 based on the angle information collected by the angle sensor 80, so as to adjust the transmission speed of the power output device 40.
For example, when the controller 20 obtains a large acceleration value of the power output device 40 based on the angle information of the power output shaft 42 acquired by the angle sensor 80, the controller 20 controls the conduction state of the reversing valve 133 of the valve group 13 so as to control the oil transmission speed between the valve group 13 and the power output device 40, so that the power output device 40 outputs hydraulic power at a fast driving speed.
When a user operates the operating element 71 of the operating device 70 to control the power output device 40 of the electronic control hydraulic system 200 to drive, the controller 20 calculates an oil flow value Z transmitted from the valve group 13 to the power output device 40 based on the feedback angle α collected by the angle sensor 80. The controller 20 automatically controls the direction switching valve 133 and the control valve 134 of the valve block 13 based on the direction and magnitude of the feedback angle α of the angle sensor 80, and controls the flow direction and the flow rate velocity of the oil 50 in the valve block 13 through the direction switching valve 133 to control the driving speed of the power output apparatus 40.
In detail, when the feedback angle α ≦ β of the operation element 71, (where β is a predetermined value), the controller 20 controls the switching valve 133 that opens the valve block 13 at a small activation voltage, so that the switching valve 133 controls the flow speed of the oil 50 in the valve block 13 at a small flow rate, thereby moving the power output apparatus 40 slowly. When the feedback angle α of the operating element 71 is greater than β (where β is a predetermined value), the controller 20 calculates the flow rate value Z of the oil 50 required for the power output device 40 to move to a corresponding angle according to the magnitude of the corresponding value of the feedback angle α. The controller 20 divides the flow value Z corresponding to the feedback angle α into an X flow segment and a Y flow segment, where Z is X + Y. α ═ β + γ, where β corresponds to the X flow segment and γ corresponds to the Y flow segment. The controller 20 controls the oil 50 in the valve set 13 to be transmitted to the power output device 40 at different flow rates in the X flow rate section and the Y flow rate section, that is, the power output device 40 outputs driving acting force at different driving speeds in the X flow rate section and the Y flow rate section of the oil 50. It is worth mentioning that the controller 20 controls the flow rate of the oil 50 in the Y flow section to be greater than the flow rate of the oil 50 in the X flow section.
When the user operates the operating element 71 of the operating device 70, the rotational angle sensor 72 collects an angular change of the operating element 71, and the controller 20 automatically calculates a control voltage required for the direction switching valve 133 based on an angular change acceleration a of the rotational angle sensor 72 to control a valve element opening degree of the direction switching valve unit 1331 of the direction switching valve 133. When the feedback angle α is determined, the controller 20 controls the switching valve unit 1331 of the switching valve 133 to be opened, controls the opening degree of the spool of the switching valve unit 1331 according to the angle change of the rotation angle sensor 72, and passes through the oil 50 of the Y flow rate section corresponding to γ. When the feedback angle reaches β, the controller 20 controls the switching valve unit 1331 of the switching valve 133 to be opened, controls the valve core opening degree of the switching valve unit 1331 according to the angle change of the rotation angle sensor 72, and passes through the oil 50 of the X flow rate section corresponding to β, wherein the valve core of the switching valve unit 1331 is slowly attached.
According to another aspect of the present invention, the present invention further provides a hydraulic driving method of an electrically controlled hydraulic system, wherein the hydraulic driving method includes the steps of:
(a) an electromagnetic spill valve 132 electrically connected to a valve block 13, wherein the electromagnetic spill valve 132 establishes the hydraulic pressure of the electro-hydraulic control system 200;
(b) acquiring a rotation angle change of an operation element 71 of an operation device 70, and obtaining a control signal based on the rotation angle change; and
(c) at least one direction change valve 133 and a control valve 134 are electrically conducted based on the control signal to control the flow direction and the flow rate of the oil in the valve block 13, and the oil 50 controls the driving direction and the driving speed of a power output device 40.
In the step (b) of the hydraulic drive method of the present invention, further comprising:
(b.1) the collected data information is transmitted to a controller 20, and the controller 20 obtains the rotational acceleration of the operating element 71 based on the collected rotational angle data information; and
(b.2) obtaining the flow speed required for controlling the oil liquid based on the rotation acceleration.
In the hydraulic drive method of the present invention, the step (b) further includes the steps of:
and acquiring a feedback angle alpha of the power output device 40, and obtaining a flow value Z of the oil liquid 50 required by the power output device 40 to move to a corresponding angle alpha. Accordingly, in step (c), the controller controls the spool opening of the direction switching valve 133 based on the detected feedback angle α and the corresponding flow rate value Z, and controls the flow direction and flow rate value of the oil by the direction switching valve 133. It is worth mentioning that when the electro-hydraulic system 200 is controlled to be raised, the controller 20 electrically conducts the first control valve 1341 of the control valve 134; when the electro-hydraulic system 200 controls the descent, the controller 20 electrically conducts the second control valve 1342 of the control valves 134.
In the hydraulic drive method of the present invention, the step (b) further includes the steps of:
judging the relation between the feedback angle alpha and beta (wherein beta is a preset value); and
if the feedback angle α is not greater than β, voltage control information of a spool opening degree of the switching valve 133 is generated, wherein the spool opening degree of the switching valve 133 corresponds to a rotational acceleration of the operating element 71, and if the feedback angle α > β, a flow rate value Z corresponding to the feedback angle α is divided into an X flow rate section and a Y flow rate section, wherein Z is X + Y, α is β + γ, wherein β corresponds to the X flow rate section, γ corresponds to the Y flow rate section, voltage control information of the spool opening degree of the switching valve 133 is generated, and a flow speed of the oil 50 of the Y flow rate section is greater than a flow speed of the oil 50 of the X flow rate section.
In the hydraulic drive method of the present invention, the step (c) further includes the steps of:
when the feedback angle α is large, the switching valve unit 1331 of the switching valve 133 is controlled to be electrically conducted, the opening degree of the spool of the switching valve unit 1331 is controlled according to the angle change of the rotation angle sensor 72, and the oil 50 of the Y flow section corresponding to γ is passed; and
when the feedback angle reaches β, the direction valve unit 1331 of the direction valve 133 is controlled to be electrically conducted, the opening degree of the valve spool of the direction valve unit 1331 is controlled according to the angle change of the rotation angle sensor 72, and the oil 50 of the X flow rate section corresponding to β passes through, wherein the valve spool of the direction valve unit 1331 is slowly attached.
The electro-hydraulic control system 200 further includes at least one hydraulic sensor 90, wherein the hydraulic sensor 90 is disposed on the valve set 13 of the hydraulic assembly 10, and the hydraulic sensor 90 collects the hydraulic pressure of the oil 50 in the valve set 13. The hydraulic sensor 90 is electrically connected to the control unit 21 of the controller 20, the hydraulic sensor 90 transmits the hydraulic data information of the valve group 13 to the control unit 21, the control unit 21 controls the on state of the valve group 13 based on the collected hydraulic data information, and the hydraulic pressure of the oil 50 in the valve group 13 is adjusted by adjusting the movement of the power output device 40.
Preferably, the hydraulic sensor 90 is disposed on the integrated valve block 131 of the valve block 13, and the pressure of the oil 50 in the integrated valve block 131 and the oil pipe is collected by the hydraulic sensor 90.
The electro-hydraulic control system 200 further includes at least one displacement sensor 201, wherein the displacement sensor 201 is disposed on the power output device 40, and displacement information of the power output device 40 is collected by the displacement sensor 201. The displacement sensor 201 is electrically connected to the controller 20, and the displacement sensor 201 transmits the collected displacement information of the power output apparatus 40 to the controller 20, so that the controller 20 controls the on state of the valve set 13 of the hydraulic assembly 10 to control the power output apparatus 40.
When the electro-hydraulic system 200 is in the unloading state, the controller 20 controls the electromagnetic spill valve 132 of the valve group 13, and the reversing valve 133 and the control valve 134 are in the de-energized state. When the electrically controlled hydraulic system 200 needs to be lifted or lowered, the controller 20 controls the electromagnetic spill valve 132 of the valve block 13 to be in an electrically conductive state, and the electromagnetic spill valve 132 builds pressure. The controller 20 obtains an acceleration value (or a deceleration value) of the power output apparatus 40 and obtains the flow rate of the oil 50 required by the power output apparatus 40 based on the angle data information of the operating element 71 collected by the rotation angle sensor 72 of the operating device 70 and the data information collected by the angle sensor 80 and the hydraulic pressure sensor 90. The control unit 21 of the controller 20 individually controls the direction valve unit 1331 of the direction valve 133 to be turned on; or the second direction valve unit 1332 is separately controlled to be conducted by the control unit 21; or the control unit 21 controls the direction valve unit 1331 and the second direction valve unit 1332 to be in a conducting state together, so as to meet the flow demand of the power output device 40 for the oil 50.
Therefore, when the operation element 71 of the operation device 70 is operated, the corner controller 72 transmits the collected operation data information of the operation element 71 to the controller 20 in real time, and controls the valve unit of the valve block 13 to be opened or closed by the control unit 21 of the controller 20 based on the operation data information.
The electro-hydraulic system 200 has a floating hydraulic mode and a high pressure mode, and the operation mode of the electro-hydraulic system 200 is controlled by the control unit 21 of the controller 20. When the electro-hydraulic system 200 is in the floating mode, the oil 50 is pumped into the integration valve block 131 of the valve block 13. The controller 20 controls the electromagnetic overflow valve 132 of the valve set 13 to be energized to enable the valve set 13 to build pressure, and when the controller 20 controls the reversing valve 133 of the valve set 13 not to work, the controller 20 controls the first control valve 1341 of the control valve 134 to be energized, wherein the upper end of the driving cylinder 41 of the power output device 40 has no pressure, and the lower end of the driving cylinder 41 is pressed down. The power output device 40 of the electric control hydraulic system 200 is depressurized under the gravity and traction of the suspension assembly 60 until the power output shaft 42 of the power output device 40 descends to the position required by the operating device 70, and the valve group 13 is in a middle unloading state. When the controller 20 controls the first control valve 1341 to be powered on and controls the second control valve to be powered off, the lower end of the driving cylinder 41 of the power output device 40 maintains pressure, the upper end of the driving cylinder 41 has no pressure, and the suspension assembly 60 maintains a certain suspension height.
When the controller 20 selects the strong pressure mode, the user operates the operating member 71 of the operating device 70, wherein the rotational angle sensor 72 collects the rotational angle of the operating member 71 and transmits the rotational angle data to the control unit 21 of the controller 20. The controller 20 controls the electromagnetic spill valve 132 to be opened, so that the valve group 13 builds pressure. The controller 20 controls the direction switching valve 133 and controls the first control valve 1341 or the second control valve 1342 of the control valve 134 to be opened, wherein the oil in the valve set 13 is introduced into the power output device 40, and the suspension assembly 60 is driven to ascend or descend by the power output device 40.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims (19)

1. An electrically controlled hydraulic system, comprising:
a hydraulic assembly;
a power take-off and an oil driveable between the hydraulic assembly and the power take-off, wherein the power take-off is communicably connected to the hydraulic assembly, wherein the power take-off outputs hydraulic power in the form of the transmission of the oil;
a controller, wherein the hydraulic assembly is electrically connected to the controller; and
and the operating device is electrically connected with the controller, the operating device further comprises an operating element and at least one rotation angle sensor, the rotation angle sensor is arranged on the operating element, the rotation angle sensor is electrically connected with the controller, and a rotation angle change value of the operating element is acquired by the rotation angle sensor, wherein the controller controls the hydraulic assembly based on the rotation angle change value so as to control the transmission speed and the transmission direction of the oil.
2. The electro-hydraulic control system according to claim 1, wherein the hydraulic assembly comprises a tank, at least one oil pump, and at least one valve block, wherein the oil pump delivers the oil stored in the tank to the valve block, wherein the valve block is electrically connected to the controller, and the controller controls the direction of the oil flow in the valve block.
3. The electro-hydraulic control system according to claim 2, wherein the valve block further comprises an integration valve block, at least one electromagnetic spill valve, at least one directional control valve, and at least one control valve, wherein the electromagnetic spill valve, the directional control valve, and the control valve are electrically connected to the controller, and the controller controls the electrical conduction state of the electromagnetic spill valve, the directional control valve, and the control valve, wherein when the directional control valve is energized, the directional control valve controls the flow direction of the oil, and when the controller controls the control valve to be energized, the oil in the valve block is transmitted to the power take-off and the power take-off outputs hydraulic power.
4. The electro-hydraulic system of claim 3, wherein the directional valve includes at least two directional valve units, wherein the directional valve units are connected in parallel with each other and are independently disposed on the integrated valve block.
5. The electro-hydraulic control system according to claim 4, wherein the reversing valve unit of the reversing valve is a voltage proportional reversing valve, and the controller controls the flow rate of the oil in the valve block by controlling the voltage value of the reversing valve unit.
6. The electro-hydraulic control system of claim 3, wherein the valve block further includes at least one adapter, wherein the adapter is communicatively coupled to the manifold block, wherein the control valve controls the opening and closing of the adapter, and wherein the manifold block transfers the oil to the power take-off via the adapter when the control valve is controlled by the controller to be electrically conductive.
7. The electro-hydraulic system of claim 6, wherein the control valve further comprises a first control valve and a second control valve, wherein the first control valve and the second control valve are disposed on the integration valve block, wherein the power take-off is lifted by the oil to output a driving force when the first control valve is electrically conductive, and wherein the power take-off is lowered by the oil to output a driving force when the second control valve is electrically conductive.
8. The electro-hydraulic system of claim 7, wherein the power take-off comprises at least one drive cylinder and at least one power take-off shaft, wherein the power take-off shaft is drivably connected to the drive cylinder, the valve block is communicably connected to the drive cylinder via the adapter, and the oil drives the power take-off shaft up when the first control valve is conductive and drives the power take-off shaft down when the second control valve is conductive.
9. The electro-hydraulic system of claim 3, wherein the valve block further comprises at least one external hydraulic control valve and at least one external hydraulic adapter, wherein the external hydraulic control valve and the external hydraulic adapter are disposed on the integrated valve block, the external hydraulic control valve controls opening and closing of the external hydraulic adapter, the external hydraulic control valve is electrically connected to the controller, and the controller controls the electrical continuity of the external hydraulic control valve to provide hydraulic kinetic energy to an external tool via the external hydraulic adapter.
10. An electro-hydraulic system according to any one of claims 2 to 9, further comprising at least one angle sensor, wherein the angle sensor is disposed at the power take-off, the angle sensor sensing a feedback angle α of the power take-off, wherein the controller derives an oil flow value Z delivered by the valve block to the power take-off based on the feedback angle α, the controller controlling the reversing valve and the control valve based on the oil flow value Z of the feedback angle α.
11. The electro-hydraulic control system according to claim 10, wherein the controller determines the feedback angles α and β, where β is a predetermined value relationship, and if the feedback angle α is not greater than β, the controller generates voltage control information of a spool opening degree of the directional valve, where the spool opening degree of the directional valve corresponds to a rotational acceleration of the operating element, and if the feedback angle α > β, divides a flow value Z corresponding to the feedback angle α into an X flow section and a Y flow section, where Z is X + Y, α is β + γ, where β corresponds to the X flow section, γ corresponds to the Y flow section, generates voltage control information of the spool opening degree of the directional valve, and a flow speed of the oil of the Y flow section is greater than a flow speed of the oil of the X flow section.
12. The electro-hydraulic system of claim 10, further comprising at least one hydraulic sensor, wherein the hydraulic sensor is disposed in the valve block of the hydraulic assembly and is electrically connected to the controller, wherein the hydraulic sensor senses oil pressure in the valve block and transmits sensed pressure data to the controller, and wherein the controller controls the valve block of the hydraulic assembly based on the pressure data.
13. A hydraulic drive method, wherein the hydraulic drive method comprises the steps of:
(a) an electromagnetic overflow valve electrically connected with a valve group, wherein the electromagnetic overflow valve establishes the hydraulic pressure of the electric control hydraulic system;
(b) acquiring the rotation angle change of an operating element of an operating device, and obtaining a control signal based on the rotation angle change; and
(c) and at least one reversing valve and a control valve are electrically conducted based on the control signal so as to control the flow direction and the flow speed of the oil in the valve group, and the oil controls the driving direction and the driving speed of a power output device.
14. The hydraulic drive method of claim 13, wherein in said step (b), further comprising:
(b.1) the collected data information is transmitted to a controller, and the controller obtains the rotation acceleration of the operating element based on the collected rotation angle data information; and
(b.2) obtaining the flow speed required for controlling the oil liquid based on the rotation acceleration.
15. The hydraulic drive method of claim 13 wherein said step (b) further comprises the step of:
and acquiring a feedback angle alpha of the power output device, and obtaining a flow value Z of the oil liquid required by the power output device to move to a corresponding angle alpha.
16. The hydraulic driving method according to claim 15, wherein in step (c), the controller controls a spool opening of the direction change valve, by which a flow direction and a flow value of the oil are controlled, based on the detected feedback angle a and the corresponding flow value Z.
17. The hydraulic drive method of claim 15 wherein said step (b) further comprises the step of:
judging the relation between the feedback angle alpha and beta, wherein beta is a preset value, and if the feedback angle alpha is not more than beta, generating voltage control information of the valve core opening degree of the reversing valve, wherein the valve core opening degree of the reversing valve corresponds to the rotation acceleration of the operating element; and if the feedback angle alpha is larger than beta, dividing the flow value Z corresponding to the feedback angle alpha into an X flow section and a Y flow section, wherein Z is X + Y, and alpha is beta + gamma, beta corresponds to the X flow section, gamma corresponds to the Y flow section, generating voltage control information of the opening degree of a valve core of the reversing valve, and the flow speed of the oil liquid in the Y flow section is larger than that of the oil liquid in the X flow section.
18. The hydraulic drive method of claim 17 wherein said step (c) further comprises the step of:
controlling the reversing valve unit of the reversing valve to be electrically conducted, controlling the opening degree of a valve core of the reversing valve unit according to the angle change of the rotation angle sensor, and passing through the oil liquid of a Y flow section corresponding to gamma; and
and when the feedback angle reaches beta, controlling the reversing valve unit of the reversing valve to be electrically conducted, controlling the opening degree of a valve core of the reversing valve unit according to the angle change of the rotation angle sensor, and passing through the oil liquid of the X flow section corresponding to the beta, wherein the valve core of the reversing valve unit is slowly attached.
19. An agricultural machine, comprising:
an agricultural machinery host; and
an electro-hydraulic system, wherein the electro-hydraulic system is mounted to the agricultural machinery main frame, wherein the electro-hydraulic system further comprises:
a hydraulic assembly;
a power take-off and an oil driveable between the hydraulic assembly and the power take-off, wherein the power take-off is communicably connected to the hydraulic assembly, wherein the power take-off outputs hydraulic power in the form of the transmission of the oil;
a controller, wherein the hydraulic assembly is electrically connected to the controller; and
and the operating device is electrically connected with the controller, the operating device further comprises an operating element and at least one rotation angle sensor, the rotation angle sensor is arranged on the operating element, the rotation angle sensor is electrically connected with the controller, and a rotation angle change value of the operating element is acquired by the rotation angle sensor, wherein the controller controls the hydraulic assembly based on the rotation angle change value so as to control the transmission speed and the transmission direction of the oil.
CN202010324371.0A 2020-04-23 2020-04-23 Electrically controlled hydraulic system and hydraulic drive method Pending CN112483488A (en)

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