CN114962364A - Paver control system and method with intelligent electro-hydraulic driving unit - Google Patents

Paver control system and method with intelligent electro-hydraulic driving unit Download PDF

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Publication number
CN114962364A
CN114962364A CN202210567868.4A CN202210567868A CN114962364A CN 114962364 A CN114962364 A CN 114962364A CN 202210567868 A CN202210567868 A CN 202210567868A CN 114962364 A CN114962364 A CN 114962364A
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CN
China
Prior art keywords
electro
hydraulic
control
drive unit
pressure
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Pending
Application number
CN202210567868.4A
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Chinese (zh)
Inventor
郑建丰
井然
李英瑞
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Xuzhou XCMG Road Construction Machinery Co Ltd
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Xuzhou XCMG Road Construction Machinery Co Ltd
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Priority to CN202210567868.4A priority Critical patent/CN114962364A/en
Publication of CN114962364A publication Critical patent/CN114962364A/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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • 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
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only
    • F15B13/0803—Modular units
    • F15B13/0832—Modular valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D25/00—Fluid-actuated clutches
    • F16D25/12—Details not specific to one of the before-mentioned types
    • F16D25/14—Fluid pressure control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0203—Control by fluid pressure with an accumulator; Details thereof
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0221—Valves for clutch control systems; Details thereof
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)

Abstract

The invention discloses a paver control system and a paver control method with an intelligent electro-hydraulic drive unit in the technical field of pavers, wherein the paver control system comprises an electro-hydraulic drive unit, a hydraulic control valve group, an actuating mechanism and a control module (I/O), wherein: a hydraulic interface of the electro-hydraulic drive unit is connected with an oil inlet/return port of the hydraulic control valve bank; the working oil port of the hydraulic control valve group is connected with the oil port of the actuating mechanism; the electric interfaces of the electro-hydraulic drive unit and the hydraulic control valve group are respectively connected with the port of a control module (I/O), and after the control module (I/O) receives parameters and instructions input from the outside, the control module controls and operates the actuating mechanism through the electro-hydraulic drive unit and the hydraulic control valve group. The invention realizes various control modes of flow control, pressure control, power control and the like of the electro-hydraulic drive unit to different execution mechanisms by a software program writing mode, and realizes the control of various execution mechanisms by matching with a hydraulic control valve group.

Description

Paver control system and method with intelligent electro-hydraulic driving unit
Technical Field
The invention relates to a paver control system with an intelligent electro-hydraulic driving unit and a paver control method, belonging to the technical field of pavers.
Background
The paver is used as road construction equipment with the most functions and the highest complexity. Under the condition that the labor cost and human resources are increasingly scarce at present, users pay more attention to convenience and intelligence of equipment operation on the basis of pursuing the satisfaction of construction function requirements.
In the prior art, an actuating mechanism with larger driving power of the paver is mostly controlled by a hydraulic system, such as a walking system; the actuator with low power requirement is generally controlled by a manual or electric actuator or an independent hydraulic loop system, for example, the lifting of a driving shed of the paver is mostly operated by a mode of manually pressing an independently arranged hand pump, for example, the extension and retraction control of a telescopic oil cylinder of a screed plate of the paver is mostly controlled to an appointed operation position by an independently arranged hydraulic pump driving system, for example, the control of a power clutch of the paver is generally controlled by an independently arranged hydraulic shunt loop system for meeting the response time requirement in the clutch process, and the like. The control of the executing mechanisms needs to be operated by independently setting corresponding driving devices according to respective working characteristics, so that not only are hardware resources wasted and the operation is complicated, but also some operations can be executed after the diesel engine is normally operated and deviate from the energy-saving requirement.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a paver control system and method with an intelligent electro-hydraulic drive unit, which can realize various control modes of flow control, pressure control, power control and the like of the electro-hydraulic drive unit to different execution mechanisms in a software program writing mode according to the parameter configuration requirements of an execution mechanism of a paver, and can realize the control of various execution mechanisms by matching with a hydraulic control valve group.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
in a first aspect, the present invention provides a method of controlling a paving machine having an intelligent electro-hydraulic drive unit, comprising the electro-hydraulic drive unit, a set of hydraulic control valves, an actuator, and a control module (I/O), wherein:
a hydraulic interface of the electro-hydraulic drive unit is connected with an oil inlet/return port of the hydraulic control valve bank;
the working oil port of the hydraulic control valve group is connected with the oil port of the actuating mechanism;
the electric interfaces of the electro-hydraulic drive unit and the hydraulic control valve group are respectively connected with the port of a control module (I/O), and after the control module (I/O) receives parameters and instructions input from the outside, the control module controls and operates the actuating mechanism through the electro-hydraulic drive unit and the hydraulic control valve group.
Furthermore, the electro-hydraulic drive unit comprises a hydraulic pump, a drive motor, an electro-hydraulic drive unit ECU, a pressure control valve, a pressure sensor and an oil tank, wherein the hydraulic pump is connected with the oil tank, and the electro-hydraulic drive unit ECU outputs a control instruction to rotate the drive motor according to the user parameter configuration requirement, so that the flow output of the hydraulic pump is controlled; the electro-hydraulic drive unit ECU sets parameters of outlet pressure of the hydraulic pump by controlling the pressure control valve, and the pressure sensor monitors and feeds back the outlet pressure of the hydraulic pump.
Further, the control mode of the pressure control valve comprises pressure control, flow control and power control, wherein:
and (3) pressure control: setting the rotating speed of the driving motor to be a constant value, and controlling the pressure parameter of the pressure control valve to change according to the requirement of a user;
flow control: setting the pressure of the pressure control valve to a constant value, and controlling the rotating speed parameter of the driving motor to change according to the requirement of a user;
and (3) power control: and setting the product of the pressure parameter of the pressure control valve and the rotating speed parameter of the driving motor to a constant value according to the requirement of a user for operation.
Furthermore, the drive motor of the electro-hydraulic drive unit is a direct current motor or an alternating current motor, the hydraulic pump is a fixed displacement pump, the fixed displacement pump comprises a gear pump, a vane pump or a plunger pump, the pressure control valve is an electric proportional pressure valve, and the electro-hydraulic drive unit ECU is a programmable controller.
Furthermore, the hydraulic control valve group comprises a first electromagnetic directional valve, a second electromagnetic directional valve, a third electromagnetic directional valve and an energy accumulator, wherein an oil inlet of the first electromagnetic directional valve is connected with an oil outlet of the electrohydraulic driving unit, and a working oil port of the first electromagnetic directional valve is connected with an oil inlet of the third electromagnetic directional valve; an oil return port of the first electromagnetic directional valve is connected with an oil return port of the electro-hydraulic drive unit, another working oil port of the first electromagnetic directional valve is connected with an oil inlet of the second electromagnetic directional valve, and an energy accumulator in the hydraulic control valve group is connected to an inlet of the third electromagnetic directional valve in parallel.
Furthermore, the actuating mechanism comprises a driving shed lifting oil cylinder and a power clutch, a third electromagnetic directional valve is connected with the power clutch, a second electromagnetic directional valve is connected with the driving shed lifting oil cylinder, the three electromagnetic directional valves control oil pressure to enter a brake cavity of the power clutch when being electrified to separate the power clutch, the three electromagnetic directional valves control the oil pressure release of the brake cavity of the power clutch when being powered off to combine the power clutch, and the energy accumulator can be matched with the oil inlet response time of the power clutch; the first electromagnetic directional valve is used for controlling the lifting of the driving shed lifting oil cylinder when being electrified, and the first electromagnetic directional valve and the second electromagnetic directional valve are both used for controlling the descending of the driving shed lifting oil cylinder when being electrified.
Furthermore, the control module (I/O) is a programmable controller with input/output ports, the ports of the controller are respectively electrically connected with the power supply, the main console, the electro-hydraulic drive unit ECU, the external operation unit and the hydraulic control valve bank, the external operation unit and the control module (I/O) are connected in a cable connection or a wireless signal connection, and the main console and the control module (I/O) are connected in a CAN connection.
In a second aspect, the present invention provides a paver control system having an intelligent electro-hydraulic drive unit, implemented by a control module (I/O), comprising:
receiving externally written drive control parameters;
transmitting the drive control parameters to an electro-hydraulic drive unit to match the control characteristics of an actuating mechanism;
receiving an operation instruction of an external operation unit;
and controlling the pressure oil of the electro-hydraulic driving unit to drive the actuating mechanism to perform actions through the hydraulic control valve bank based on an operation instruction of the external operation unit.
Furthermore, when the operation instruction of the external operation unit is a rising instruction, the pressure oil of the electro-hydraulic drive unit is electrified through a solenoid directional valve in the hydraulic control valve group to drive a rodless cavity of a driving shed lifting oil cylinder in the execution mechanism to move upwards; when the operation instruction of the external operation unit is a descending instruction, the pressure oil of the electro-hydraulic drive unit moves downwards through a rod cavity of a driving shed lifting oil cylinder in the electric drive execution mechanism of a first electromagnetic directional valve and a second electromagnetic directional valve in the hydraulic control valve group.
Furthermore, the actuating mechanism comprises a driving shed lifting oil cylinder and a power clutch which are operated independently, when the operating instruction of the external operating unit is a disengagement instruction, the electro-hydraulic driving unit firstly starts to charge oil to an energy accumulator in the hydraulic control valve group to build pressure, pressure oil enters a brake cavity of the power clutch after delay through three-way electric control oil pressure of an electromagnetic directional valve in the hydraulic control valve group, after the power clutch is disengaged, the rotating speed of the driving motor is automatically reduced by an electro-hydraulic driving unit ECU according to feedback information of a pressure sensor in the electro-hydraulic driving unit, and the flow required for maintaining the set pressure is output.
Compared with the prior art, the invention has the following beneficial effects:
compared with the prior art, a user can realize various control forms of flow control, pressure control, power control and the like of the electro-hydraulic drive unit to different execution mechanisms in a software program writing mode according to the parameter configuration requirements of the paver execution mechanism, and the electro-hydraulic drive unit is matched with a hydraulic control valve group to realize the control of the various execution mechanisms; meanwhile, centralized control of different execution mechanisms by the main console is realized through configuration of the control module (I/O), or remote or near control is performed by utilizing an external operation unit, so that the intelligent level of control of the paver is improved, and the paver is not only energy-saving, but also simple in control and wide in application.
Drawings
FIG. 1 is a schematic diagram of a paving machine control system with an intelligent electro-hydraulic drive unit according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of a control module (I/O) configuration of a paving machine control system having an intelligent electro-hydraulic drive unit, according to an embodiment of the present invention.
In the figure: 1. an electro-hydraulic drive unit; 2. a hydraulic control valve group; 3. an actuator; 4. a control module (I/O); 1.1, a hydraulic pump; 1.2, driving a motor; 1.3, an electro-hydraulic drive unit ECU; 1.4, a pressure control valve; 1.5, a pressure sensor; 1.6, an oil tank; 2.1, a first electromagnetic directional valve; 2.2, a second electromagnetic directional valve; 2.3, a third electromagnetic directional valve; 2.4, an energy accumulator; 3.1, driving a shed lifting oil cylinder; 3.2 and a power clutch.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
as shown in fig. 1-2, the present embodiment discloses a paver control system with an intelligent electro-hydraulic drive unit, which includes an electro-hydraulic drive unit 1, a hydraulic control valve group 2, an actuator 3 and a control module (I/O)4, wherein a hydraulic interface of the electro-hydraulic drive unit 1 is connected to an oil inlet/return port of the hydraulic control valve group 2, and a working oil port of the hydraulic control valve group 2 is connected to an oil port of the actuator 3; an electrical interface of the electro-hydraulic drive unit 1 and an electrical interface of the hydraulic control valve group 2 are respectively connected with a port of a control module (I/O) 4.
The electro-hydraulic drive unit 1 comprises a hydraulic pump 1.1, a drive motor 1.2, an electro-hydraulic drive unit ECU1.3, a pressure control valve 1.4, a pressure sensor 1.5 and an oil tank 1.6, and is integrated into a whole; the electro-hydraulic drive unit ECU1.3 outputs a control instruction to drive the drive motor 1.2 to rotate according to the user parameter configuration requirement, so as to control the flow output of the hydraulic pump 1.1; the outlet pressure of the hydraulic pump 1.1 is subjected to parameter setting through the pressure control valve 1.4, and the outlet pressure of the hydraulic pump 1.1 is monitored and fed back by the pressure sensor 1.5.
The driving motor 1.2 of the electrohydraulic driving unit 1 can be a direct current motor or an alternating current motor; the hydraulic pump 1.1 is a fixed displacement pump, and can be a gear pump, a vane pump or a plunger pump; the pressure control valve 1.4 is an electric proportional pressure valve; the electro-hydraulic drive unit ECU1.3 is a programmable controller.
The electro-hydraulic drive unit 1 can set the rotating speed of a drive motor 1.2 and the pressure of a pressure control valve 1.4 through an electro-hydraulic drive unit ECU1.3 according to the configuration requirements of user parameters, and the following control modes are realized:
a. pressure control, namely setting the rotating speed of the driving motor 1.2 to be a constant value, and controlling the pressure parameter of the pressure control valve 1.4 to change according to the requirement of a user;
b. flow control, namely setting the pressure of the pressure control valve 1.4 to be a constant value, and controlling the rotating speed parameter of the driving motor 1.2 to change according to the requirement of a user;
c. and power control, namely setting the product of the pressure parameter of the pressure control valve 1.4 and the rotating speed parameter of the driving motor 1.2 to a certain constant value according to the requirement of a user for operation.
The hydraulic control valve group 2 can be configured to have a reversing function, or a start-stop function requiring response time or other hydraulic control valve groups capable of matching with the electro-hydraulic drive unit 1 to control the actuator 3 according to the working requirements of the actuator 3.
The actuator 3 can be any mechanism meeting the control requirement of the electro-hydraulic drive unit 1 in the paver, for example, the first actuator is a driving shed lifting cylinder 3.1 (or a screed telescopic cylinder), the second actuator is a power clutch 3.2, and the hydraulic control valve 2 is used for controlling the lifting and descending of the driving shed lifting cylinder 3.1 (or the extension and contraction of the screed telescopic cylinder) and controlling the disengagement or combination of the power clutch 3.2;
in the embodiment, the hydraulic control valve group 2 comprises a first electromagnetic directional valve 2.1, a second electromagnetic directional valve 2.2, a third electromagnetic directional valve 2.3 and an energy accumulator 2.4; an oil inlet of the first electromagnetic directional valve 2.1 is connected with an oil outlet of the electro-hydraulic drive unit 1, a working oil port of the first electromagnetic directional valve 2.1 is connected with an oil inlet of the third electromagnetic directional valve 2.3, oil pressure is controlled to enter a brake cavity of the power clutch 3.2 through the electrification of the third electromagnetic directional valve 2.3, the power clutch 3.2 is disengaged, the oil pressure of the brake cavity of the power clutch 3.2 is released through the outage of the third electromagnetic directional valve 2.3, and the power clutch 3.2 is combined; an oil return port of the first electromagnetic directional valve 2.1 is connected with an oil return port of the electro-hydraulic drive unit 1, another working oil port of the first electromagnetic directional valve 2.1 is connected with an oil inlet of the second electromagnetic directional valve 2.2, the lifting of the driving cab lifting oil cylinder 3.1 is controlled by electrifying the first electromagnetic directional valve 2.1, and the descending of the driving cab lifting oil cylinder 3.1 is controlled by electrifying the first electromagnetic directional valve 2.1 and the second electromagnetic directional valve 2.2.
And the energy accumulators 2.4 in the hydraulic control valve group 2 are connected in parallel at the inlet of the electromagnetic directional valve III 2.3 and are used for matching the oil inlet response time of the power clutch 3.2.
As shown in fig. 2, the control module (I/O)4 is a programmable controller with input/output ports, and the ports of the controller are respectively connected with the power supply, the main console, the electro-hydraulic drive unit ECU1.3, the external operation unit, and the hydraulic control valve bank 2 through electrical interfaces including a first electromagnetic directional valve 2.1, a second electromagnetic directional valve 2.2, and a third electromagnetic directional valve 2.3. The connection between the external operation unit and the control module (I/O)4 may be a cable connection or a wireless signal connection, that is, a short-distance operation or a long-distance operation; the connection between the master console and the control module (I/O)4 is CAN connection, and a master operator CAN perform centralized operation on different execution mechanisms 3 through the master console.
Example two:
the embodiment also discloses a paving machine control method with the intelligent electro-hydraulic driving unit, which comprises the following steps:
a, writing parameters of an electro-hydraulic drive unit ECU1.3 through a control module (I/O)4 according to the flow control characteristics of a driving shed lifting oil cylinder 3.1 (or a screed plate telescopic oil cylinder) of an actuating mechanism I, the constant pressure and the constant flow (constant power) in the disengagement process of a power clutch 3.2 of an actuating mechanism II and the constant pressure control characteristics after disengagement;
b, clicking a 3.1-liter button of the driving shed lifting oil cylinder through an external operation unit, and electrifying pressure oil of the electro-hydraulic drive unit 1 through a first electromagnetic directional valve 2.1 to drive a rodless cavity of the driving shed lifting oil cylinder 3.1 to move upwards; and when the external operation unit clicks a descending button of the driving shed lifting oil cylinder 3.1, the pressure oil of the electro-hydraulic driving unit 1 is electrified through the first electromagnetic directional valve 2.1 and the second electromagnetic directional valve 2.2 to drive a rod cavity of the driving shed lifting oil cylinder 3.1 to move downwards.
And c, in order to avoid mutual interference of actions of the first executing mechanism and the second executing mechanism, the two executing mechanisms need to be operated independently, and the actions are not distinguished. Clicking a disengagement button of the power clutch 3.2 through an external operation unit, starting the electro-hydraulic drive unit 1 to charge oil to the energy accumulator 2.4 for pressure build-up, and after about 500ms of delay, controlling the oil pressure to enter a brake cavity of the power clutch 3.2 through a third 2.3 electromagnetic directional valve to disengage the power clutch 3.2; after the system is disconnected, the system can feed back information according to the pressure sensor 1.5, and the electro-hydraulic drive unit ECU1.3 can automatically reduce the rotating speed of the drive motor 1.2 and output the flow required for maintaining the set pressure.
According to the above embodiments, the following preferred description is made of the application scenario of the paving machine control system and method with the intelligent electrohydraulic driving unit. For example, in construction in high-altitude areas, the paving construction is often affected due to the problems that the oxygen content of air is low and the starting load of an engine of the paver is large, so that the engine is started for many times or cannot be started. At this time, before the engine is started, a user can click a driving shed lifting button by using an external operation unit (the external operation unit is in wireless connection with a control module (I/O), such as a wireless key), the control module (I/O)4 is triggered to output a driving shed lifting instruction, the electro-hydraulic drive unit 1 and the electromagnetic directional valve 2.1 in the hydraulic control valve group 2 are controlled to be electrified, the driving shed 3.1 is automatically lifted according to configured parameters, and the lifting speed of the driving shed 3.1 can be controlled by intermittent clicking or continuous clicking of the external operation unit; then, a user clicks a power clutch release button, a control module (I/O)4 is triggered to output a power clutch release instruction, the electro-hydraulic drive unit 1 and an electromagnetic directional valve 2.3 in the hydraulic control valve group 2 are controlled to be electrified, and the power clutch 3.2 is automatically released according to configured parameters. Finally, the user can easily start the engine to carry out subsequent work. The whole operation process gives full play to the advantages of the paver control system with the intelligent electro-hydraulic driving unit and the paver control method, and improves the intelligent level of the paver control.
The control method of the paver with the intelligent electro-hydraulic drive unit can carry out parameter configuration through an external control module (I/O) according to application characteristics of different actuating mechanisms of the paver, utilize the hydraulic control valve bank to control the actuating mechanisms to complete corresponding work tasks, and realize diversified and intelligent requirements of the electro-hydraulic drive unit on the pressure control, or flow control, or power control and the like of the actuating mechanisms.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A paver control system with an intelligent electro-hydraulic drive unit, characterized by comprising an electro-hydraulic drive unit, a hydraulic control valve bank, an actuator and a control module (I/O), wherein:
a hydraulic interface of the electro-hydraulic drive unit is connected with an oil inlet/return port of the hydraulic control valve bank;
the working oil port of the hydraulic control valve group is connected with the oil port of the actuating mechanism;
the electric interfaces of the electro-hydraulic drive unit and the hydraulic control valve group are respectively connected with the port of a control module (I/O), and after the control module (I/O) receives parameters and instructions input from the outside, the control module controls and operates the actuating mechanism through the electro-hydraulic drive unit and the hydraulic control valve group.
2. The paving machine control system with intelligent electro-hydraulic drive unit as claimed in claim 1, wherein the electro-hydraulic drive unit comprises a hydraulic pump, a drive motor, an electro-hydraulic drive unit ECU, a pressure control valve, a pressure sensor and an oil tank, the hydraulic pump is connected with the oil tank, the electro-hydraulic drive unit ECU outputs a control command to rotate the drive motor according to a user parameter configuration requirement, thereby controlling the flow output size of the hydraulic pump; the electro-hydraulic drive unit ECU sets parameters of outlet pressure of the hydraulic pump by controlling the pressure control valve, and the pressure sensor monitors and feeds back the outlet pressure of the hydraulic pump.
3. The paving machine control system with intelligent electro-hydraulic drive unit of claim 2, wherein the control of the pressure control valve comprises pressure control, flow control and power control, wherein:
and (3) pressure control: setting the rotating speed of the driving motor to be a constant value, and controlling the pressure parameter of the pressure control valve to change according to the requirement of a user;
flow control: setting the pressure of the pressure control valve to a constant value, and controlling the rotating speed parameter of the driving motor to change according to the requirement of a user;
and (3) power control: and setting the product of the pressure parameter of the pressure control valve and the rotating speed parameter of the driving motor to a constant value according to the requirement of a user for operation.
4. The paving machine control system with intelligent electro-hydraulic drive unit as recited in claim 2, wherein the drive motor of the electro-hydraulic drive unit is a dc motor or an ac motor, the hydraulic pump is a fixed displacement pump, the fixed displacement pump comprises a gear pump, a vane pump or a plunger pump, the pressure control valve is an electric proportional pressure valve, and the electro-hydraulic drive unit ECU is a programmable controller.
5. The paver control system with intelligent electro-hydraulic drive unit of claim 1 wherein said hydraulic control valve set comprises a first electro-magnetic directional valve, a second electro-magnetic directional valve, a third electro-magnetic directional valve and an accumulator, an oil inlet of said first electro-magnetic directional valve is connected with an oil outlet of said electro-hydraulic drive unit, and a working oil port of said first electro-magnetic directional valve is connected with an oil inlet of said third electro-magnetic directional valve; an oil return port of the first electromagnetic directional valve is connected with an oil return port of the electro-hydraulic drive unit, another working oil port of the first electromagnetic directional valve is connected with an oil inlet of the second electromagnetic directional valve, and an energy accumulator in the hydraulic control valve group is connected to an inlet of the third electromagnetic directional valve in parallel.
6. The paver control system with intelligent electrohydraulic drive units of claim 5 wherein said actuator includes a driving cab lift cylinder and a power clutch, said electromagnetic directional valve III is connected to the power clutch, said electromagnetic directional valve II is connected to the driving cab lift cylinder, said electromagnetic directional valve III controls oil pressure to enter a brake cavity of the power clutch when it is electrically energized, to disengage the power clutch, said electromagnetic directional valve III controls oil pressure release from the brake cavity of the power clutch when it is electrically de-energized, to engage the power clutch, said accumulator can match the power clutch oil-intake response time; the first electromagnetic directional valve is used for controlling the lifting of the driving shed lifting oil cylinder when being electrified, and the first electromagnetic directional valve and the second electromagnetic directional valve are both used for controlling the descending of the driving shed lifting oil cylinder when being electrified.
7. The paving machine control system with intelligent electro-hydraulic drive unit as recited in claim 1, wherein the control module (I/O) is a programmable controller with input/output ports, which are electrically interfaced with the power supply, the console, the ECU, the external operating unit, and the hydraulic control valve set, respectively, the external operating unit and the control module (I/O) are connected by cable or wireless signal, and the console and the control module (I/O) are connected by CAN.
8. A method of controlling a paving machine having an intelligent electro-hydraulic drive unit, performed by a control module (I/O), comprising:
receiving externally written drive control parameters;
transmitting the drive control parameters to an electro-hydraulic drive unit to match the control characteristics of an actuating mechanism;
receiving an operation instruction of an external operation unit;
and controlling the pressure oil of the electro-hydraulic driving unit to drive the actuating mechanism to perform actions through the hydraulic control valve bank based on an operation instruction of the external operation unit.
9. The paving machine control method with intelligent electro-hydraulic drive unit as claimed in claim 8, wherein when the operation command of the external operation unit is a lifting command, the pressure oil of the electro-hydraulic drive unit is used to drive the rodless cavity of the driving shed lifting oil cylinder in the actuating mechanism to move upwards through the electromagnetic directional valve and the electrified electromagnetic directional valve in the hydraulic control valve group; when the operation instruction of the external operation unit is a descending instruction, the pressure oil of the electro-hydraulic drive unit moves downwards through a rod cavity of a driving shed lifting oil cylinder in the electric drive execution mechanism of a first electromagnetic directional valve and a second electromagnetic directional valve in the hydraulic control valve group.
10. The method as claimed in claim 8, wherein the actuator comprises a driving cab lift cylinder and a power clutch which are operated independently, when the operation command of the external operation unit is a disengagement command, the electro-hydraulic drive unit first starts to charge oil to an energy accumulator in the hydraulic control valve group to build pressure, after delay, the pressure oil enters a brake cavity of the power clutch through three-way electric control of an electromagnetic directional valve in the hydraulic control valve group, after the power clutch is disengaged, the rotation speed of the drive motor is automatically reduced by an electro-hydraulic drive unit ECU according to feedback information of a pressure sensor in the electro-hydraulic drive unit, and a flow required for maintaining the set pressure is output.
CN202210567868.4A 2022-05-24 2022-05-24 Paver control system and method with intelligent electro-hydraulic driving unit Pending CN114962364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210567868.4A CN114962364A (en) 2022-05-24 2022-05-24 Paver control system and method with intelligent electro-hydraulic driving unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210567868.4A CN114962364A (en) 2022-05-24 2022-05-24 Paver control system and method with intelligent electro-hydraulic driving unit

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CN114962364A true CN114962364A (en) 2022-08-30

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CN202210567868.4A Pending CN114962364A (en) 2022-05-24 2022-05-24 Paver control system and method with intelligent electro-hydraulic driving unit

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