CN114951580B - Method and device for driving cooling roller to rotate, storage medium and electronic equipment - Google Patents
Method and device for driving cooling roller to rotate, storage medium and electronic equipment Download PDFInfo
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- CN114951580B CN114951580B CN202210737544.0A CN202210737544A CN114951580B CN 114951580 B CN114951580 B CN 114951580B CN 202210737544 A CN202210737544 A CN 202210737544A CN 114951580 B CN114951580 B CN 114951580B
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- 238000001816 cooling Methods 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000003860 storage Methods 0.000 title claims abstract description 12
- 239000010720 hydraulic oil Substances 0.000 claims description 31
- 238000003723 Smelting Methods 0.000 claims description 19
- 239000003921 oil Substances 0.000 claims description 13
- 238000004590 computer program Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 239000011261 inert gas Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000007600 charging Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0611—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a single casting wheel, e.g. for casting amorphous metal strips or wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/068—Accessories therefor for cooling the cast product during its passage through the mould surfaces
- B22D11/0682—Accessories therefor for cooling the cast product during its passage through the mould surfaces by cooling the casting wheel
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The invention discloses a method and a device for driving a cooling roller to rotate, a storage medium and electronic equipment, wherein the method comprises the following steps: acquiring a real-time revolution number PV of a hydraulic motor, converting the real-time revolution number PV into a first analog signal, and transmitting the first analog signal; receiving a first analog signal, comparing the real-time revolution number PV with the set revolution number SV, and determining a control instruction for the hydraulic motor according to the comparison result of the real-time revolution number PV and the set revolution number SV; and sending a second analog signal comprising a control command, and controlling the revolution number of the hydraulic motor according to the second analog signal. Therefore, the method realizes that the hydraulic motor is driven by a closed-loop control method to control the revolution of the cooling roller, and has convenient operation and high control precision.
Description
Technical Field
The invention relates to the technical field of neodymium iron boron vacuum smelting, in particular to a method and a device for driving a cooling roller to rotate, a storage medium and electronic equipment.
Background
The scheme of the existing driving cooling roller rotation is as follows: during molten steel casting, a built-in variable frequency motor of the smelting chamber is used for driving the cooling roller to rotate. The interior of the smelting chamber is generally in vacuum or a small amount of inert gas (such as argon with pressure of 27+/-1 KPa) atmosphere, and the built-in variable frequency motor needs to dissipate heat in the operation process, so that the heat dissipation effect in the interior of the smelting chamber is poor due to the lack of a heat conduction medium. Under the environment, the built-in variable frequency motor can burn after running for a period of time, and can burn out after 2 to 3 months of use, and the built-in variable frequency motor needs to be replaced again.
In the above scheme, a multi-speed control mode of the frequency converter is generally used, the frequency is outputted by a fixed value to control the number of revolutions of the built-in variable frequency motor of the cooling roller, if the number of revolutions of the cooling roller is found to be not in accordance with the smelting production process requirement and needs to be adjusted, the frequency of the frequency converter which needs to be adjusted is calculated according to the real-time number of revolutions of the cooling roller and the set number of revolutions of the cooling roller, and then the calculated frequency of the frequency converter is inputted into the frequency converter, namely, the method of controlling the number of revolutions of the cooling roller by an open loop is complex in operation and is difficult to adjust the number of revolutions in time.
Disclosure of Invention
In view of the above, the invention provides a method, a device, a storage medium and an electronic device for driving a cooling roller to rotate, which realize that a hydraulic motor is driven by an incomplete differential PID closed-loop control method to control the rotation number of the cooling roller, and the method is convenient to operate and high in control precision.
An embodiment of a first aspect of the present invention provides a control method for driving a cooling roller to rotate by a hydraulic motor system, wherein the hydraulic motor system includes:
The hydraulic motor is arranged in the vacuum smelting furnace and connected with the cooling roller, and the hydraulic motor is used for driving the cooling roller to rotate;
The revolution sensing device comprises a revolution sensor and a dial indicator, and is used for acquiring the revolution of the cooling roller;
And the proportional valve amplifier is electrically connected with the proportional valve and is used for controlling the proportional valve to adjust the flow of hydraulic oil.
The control method for driving the cooling roller to rotate by the hydraulic motor system comprises the following steps:
acquiring a real-time revolution number PV of a hydraulic motor, converting the real-time revolution number PV into a first analog signal, and transmitting the first analog signal;
Receiving a first analog signal, comparing the real-time revolution number PV with the set revolution number SV, and determining a control instruction for the hydraulic motor according to the comparison result of the real-time revolution number PV and the set revolution number SV;
And sending a second analog signal comprising a control command, and controlling the revolution number of the hydraulic motor according to the second analog signal.
In some embodiments, obtaining the real-time revolution number PV includes:
the revolution sensor acquires a pulse signal of the revolution of the hydraulic motor, feeds back the pulse signal to the dial indicator, and converts the pulse signal into a real-time revolution PV.
In some embodiments, transmitting the first analog signal includes:
the first analog signal is converted into a real-time revolution signal, and the real-time revolution signal is transmitted.
In some embodiments, transmitting the second analog signal includes:
and receiving the real-time revolution number signal, converting the real-time revolution number signal into a second analog signal, and transmitting the second analog signal.
In some embodiments, a method of controlling the number of revolutions of a hydraulic motor according to a second analog signal includes:
the proportional valve amplifier receives the second analog signal, converts the second analog signal into a hydraulic oil mass signal and sends the hydraulic oil mass signal to the proportional valve;
The proportional valve controls the oil quantity in the hydraulic motor according to the hydraulic oil quantity signal so as to control the revolution number of the hydraulic motor.
In some embodiments, the second analog signal is linearly related to the amount of oil within the hydraulic motor.
In some embodiments, the first analog signal is a current signal ranging from 4mA to 20mA; the second analog signal is a direct current voltage signal in the range of 0V to 5V.
An embodiment of the second aspect of the present invention provides a control device for driving a cooling roller to rotate by a hydraulic motor system, wherein the hydraulic motor system includes:
The hydraulic motor is arranged in the vacuum smelting furnace and connected with the cooling roller, and the hydraulic motor is used for driving the cooling roller to rotate;
The revolution sensing device comprises a revolution sensor and a dial indicator, and is used for acquiring the revolution of the cooling roller;
And the proportional valve amplifier is electrically connected with the proportional valve and is used for controlling the proportional valve to adjust the flow of hydraulic oil.
The control device comprises:
The analog input module is used for acquiring the real-time revolution number PV of the hydraulic motor, converting the real-time revolution number PV into a first analog signal and transmitting the first analog signal;
The CPU module receives the first analog signal, compares the real-time revolution number PV with the set revolution number SV and determines a control instruction for the hydraulic motor according to the comparison result of the real-time revolution number PV and the set revolution number SV;
and the analog output module is used for sending a second analog signal comprising a control instruction and controlling the revolution of the hydraulic motor.
In some embodiments, obtaining the real-time revolution number PV includes:
the revolution sensor acquires a pulse signal of the revolution of the hydraulic motor, feeds back the pulse signal to the indication meter, and the indication meter converts the pulse signal into a real-time revolution PV.
In some embodiments, transmitting the first analog signal includes:
The analog input module converts the first analog signal into a real-time revolution signal and sends the real-time revolution signal.
In some embodiments, transmitting the second analog signal includes:
The CPU module receives the real-time revolution signal, and the analog output module converts the real-time revolution signal into a second analog signal and sends the second analog signal.
In some embodiments, a method of controlling the number of revolutions of a hydraulic motor according to a second analog signal includes:
the proportional valve amplifier receives the second analog signal, converts the second analog signal into a hydraulic oil mass signal and sends the hydraulic oil mass signal to the proportional valve;
The proportional valve controls the oil quantity in the hydraulic motor according to the hydraulic oil quantity signal so as to control the revolution number of the hydraulic motor.
In some embodiments, the second analog signal is linearly related to the amount of oil within the hydraulic motor.
In some embodiments, the first analog signal is a current signal ranging from 4mA to 20mA; the second analog signal is a direct current voltage signal in the range of 0V to 5V.
An embodiment of the third aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described control method for driving a cooling roller to rotate by a hydraulic motor system.
An embodiment of a fourth aspect of the present invention provides an electronic apparatus that performs a control method of a hydraulic motor system driving a cooling roller to rotate, including a processor and a memory for storing operation instructions; the processor is used for executing the control method for driving the cooling roller to rotate by the hydraulic motor system by calling the operation instruction.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
a control method for a hydraulic motor system to drive a cooling roller to rotate, comprising: acquiring a real-time revolution number PV of a hydraulic motor, converting the real-time revolution number PV into a first analog signal, and transmitting the first analog signal; receiving a first analog signal, comparing the real-time revolution number PV with the set revolution number SV, and determining a control instruction for the hydraulic motor according to the comparison result of the real-time revolution number PV and the set revolution number SV; and sending a second analog signal comprising a control command, and controlling the revolution number of the hydraulic motor according to the second analog signal. Therefore, the hydraulic motor is driven to control the revolution of the cooling roller by the incomplete differential PID closed-loop control method, the operation is convenient, and the control precision is high.
The hydraulic motor can adapt to vacuum or a small amount of inert gas atmosphere in the vacuum smelting furnace, so that the cooling roller driving device is prevented from being burnt out due to the lack of a heat dissipation medium; and the hydraulic motor can adapt to the environment with more dust, so that the phenomena of overheating of the motor, bearing blocking and the like caused by covering metal dust are avoided, and the service life of the cooling roller driving device is prolonged.
The technical scheme is that an incomplete differential PID closed-loop control method is adopted, the set revolution SV is set in the CPU module, the real-time revolution PV is enabled to track the set revolution SV, and the real-time revolution SV and the set revolution SV are kept consistent, and the incomplete differential PID closed-loop control method is high in control precision, simple and convenient to operate and convenient to adjust the real-time revolution PV of the cooling roller in time.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 shows a schematic cross-sectional structure of a vacuum melting furnace according to an embodiment of the present invention;
FIG. 2 shows a schematic flow chart of open loop control of a built-in variable frequency motor to drive a cooling roller to rotate;
FIG. 3 shows a schematic view of a smelting chamber that uses a built-in hydraulic motor system to drive the cooling rolls in rotation;
FIG. 4 shows a schematic flow chart of a closed-loop control built-in hydraulic motor system driving a cooling roller to rotate;
fig. 5 is a schematic structural view of a control device for driving a cooling roller to rotate by a hydraulic motor system according to an embodiment of the present invention;
fig. 6 shows a schematic structural diagram of an electronic device according to an embodiment of the present invention.
The correspondence between the reference numerals and the component names in fig. 1 to 6 is:
10 charging chambers, 11 first gate valves, 12 charging mechanisms, 20 smelting chambers, 21 crucibles, 22 tundish, 23 cooling rolls, 24 driving devices, 25 trolleys, 30 preparation chambers, 31 second gate valves, 40 recovery devices, 50 hydraulic motor systems.
Detailed Description
In order that the above-recited objects, features and advantages of the invention will be more clearly understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
An alternative embodiment of the present invention will be described in detail below with reference to fig. 1 to 6.
The vacuum melting furnace is equipment for feeding, melting, refining, casting, quick setting and recycling metal raw materials such as neodymium iron boron and the like under vacuum or inert gas atmosphere, and comprises a feeding chamber 10, a melting chamber 20, a preparation chamber 30 and a recycling device 40. As shown in fig. 1, the charging chamber 10 and the melting chamber 20 are set under an isobaric inert gas atmosphere, the first gate valve 11 is opened, the metal raw material is fed into the crucible 21 through the charging mechanism 12, and then the charging mechanism 12 is retracted, and the first gate valve 11 is closed. The metal raw material is melted in the crucible 21, and the melted liquid metal is cast onto the rotating cooling roll 23 through the tundish 22 at a constant flow rate, rapidly solidified into alloy flakes and falls into the recovery device 40. When the recovery of the alloy flakes is completed, the second gate valve 31 is opened, the carriage 25 conveys the tundish 22 and the cooling roller 23 to the preparation chamber 30, the second gate valve 31 is closed, the tundish 22 is replaced and the cooling roller 23 is polished using a sand blaster. Finally, the door of the preparation chamber 30 is closed, the preparation chamber 30 is re-evacuated and filled with inert gas, the second gate valve 31 is opened, the re-treated tundish 22 and cooling roll 23 are transported into the melting chamber 20, the second gate valve 31 is closed, and the processes of charging, melting, refining, casting, rapid hardening and recycling are repeated to complete the continuous production.
As shown in fig. 2, in the smelting process, the driving device 24 generally adopts a variable frequency motor 241 disposed inside the smelting chamber 20, and drives the variable frequency motor 241 to rotate and operate the cooling roller 23 at a constant frequency through a multi-speed mode of the frequency converter. Specifically, the sensor collects a pulse signal of the number of revolutions of the cooling roller 23 and feeds back to the revolution pulse meter, and judges whether the number of revolutions of the cooling roller 23 is proper or not according to the number of the revolutions pulse meter. When the number of revolutions of the cooling roller 23 is inappropriate, the frequency of the frequency converter to be adjusted is calculated according to the real-time number of revolutions of the cooling roller 23 and the set number of revolutions of the cooling roller 23, and then the calculated frequency of the frequency converter is input into the frequency converter, namely, the open loop control method controls the cooling roller 23 to rotate, the operation is complex, and the number of revolutions is difficult to adjust in time.
On the other hand, the interior of the smelting chamber 20 is generally in a vacuum or inert gas atmosphere, and the heat conduction medium is lack, so that the heat dissipation effect of the variable frequency motor 241 is poor in the operation process, and after a period of operation, the variable frequency motor 241 is scalded; after 2 to 3 months of use, the variable frequency motor 241 is burned out and needs to be replaced again. Meanwhile, in the smelting process, a large amount of metal dust can volatilize in the smelting furnace, and the dust covered on the shell can cause poor heat dissipation and overheating of the motor; dust covering the bearings can affect lubrication and even cause the variable frequency motor 241 to seize. If a lubricant is used to lubricate the bearings, the oil and gas atmosphere of the lubricant can also affect the vacuum environment within the melting chamber 20, causing a detrimental effect on the alloy Jin Linpian.
As shown in fig. 3, the invention provides a control method for driving a cooling roller to rotate by a hydraulic motor system, wherein the hydraulic motor is arranged in a vacuum smelting furnace and connected with the cooling roller for driving the cooling roller to rotate; the revolution sensing device comprises a revolution sensor and a dial indicator, and is used for acquiring the revolution of the cooling roller; the proportional valve amplifier is electrically connected with the proportional valve and used for controlling the proportional valve to adjust the flow of hydraulic oil. That is, the present invention uses the built-in hydraulic motor system as the driving device 24, so that the driving device 24 can work for a long time under vacuum or a small amount of inert gas atmosphere, and the hydraulic motor system can adapt to the metal dust environment, and the service life of the driving device 24 is prolonged.
The output shaft of the hydraulic motor is provided with a recognition piece, preferably, the recognition piece is of a convex structure or a concave structure made of magnetic or magnetic conductive materials, and the revolution sensor can acquire the revolution of the hydraulic motor by judging the position of the recognition piece.
Among them, the present embodiment preferably measures the number of revolutions of the hydraulic motor by an analog revolution sensor, and converts the number of revolutions of the hydraulic motor into an electrical signal to be output.
The proportional valve amplifier is used for amplifying the received electric signals so as to control the proportional valve to adjust the flow of hydraulic oil in the hydraulic motor.
As shown in fig. 4, a control method for driving the cooling roller by the hydraulic motor system is applied to the vacuum melting furnace using the built-in hydraulic motor system as the driving device 24, and is programmed based on the mitsubishi Q series PLC device to realize the control of the cooling roller by driving the hydraulic motor system by the incomplete differential PID closed-loop control method, so that the operation is convenient and the control precision is high. The Mitsubishi Q series PLC adopts a modularized structure, the maximum input/output point number can reach 4096 points, the maximum program memory capacity can reach 252K steps, the processing speed of basic instructions can reach 34ns, and the control requirement on a vacuum smelting furnace can be met.
The control method for driving the cooling roller to rotate by the hydraulic motor system comprises the following steps:
Step S102: and acquiring the real-time revolution number PV of the hydraulic motor, converting the real-time revolution number PV into a first analog signal and transmitting the first analog signal.
Specifically, an analog input module (a/D module) firstly reads the number of the indication table to obtain the real-time revolution number PV of the cooling roller, and then the analog input module performs analog conversion on the real-time revolution number PV to obtain a first analog signal and sends the first analog signal. Wherein the first analog signal is a current signal.
Step S104: and receiving a first analog signal, comparing the real-time revolution number PV with the set revolution number SV, and determining a control instruction for the hydraulic motor according to the comparison result of the real-time revolution number PV and the set revolution number SV.
Specifically, after the CPU module receives the first analog signal, the CPU module reads the real-time revolution number PV included in the first analog signal, and judges whether the real-time revolution number PV of the cooling roller needs to be adjusted according to an incomplete differential PID control method and a set revolution number SV, so that the real-time revolution number PV is consistent with the set revolution number SV, and the accuracy of closed-loop control is improved.
The incomplete differential PID control method directly monitors and controls the real-time revolution number PV of the cooling roller, and can avoid the influence of the hydraulic oil temperature and the load change of the hydraulic motor on the revolution number of the cooling roller. It will be appreciated that as the internal temperature of the vacuum melting furnace increases, the viscosity of the hydraulic oil decreases, the flow resistance becomes smaller, and the flow rate increases, resulting in the faster the number of revolutions of the hydraulic motor output, and thus the deviation from the set number of revolutions SV. On the other hand, during casting, the load of the hydraulic motor also affects the number of revolutions, the liquid metal in the crucible is cast onto the rotating cooling roller, and the alloy flakes are quickly solidified into alloy flakes, and the alloy flakes generate resistance to the rotating cooling roller, so that the load of the hydraulic motor is increased and the number of revolutions is reduced.
Step S106: and sending a second analog signal comprising a control command, and controlling the revolution number of the hydraulic motor according to the second analog signal.
Specifically, the CPU module sends a second analog signal through the analog quantity output module (D/A module) and is used for controlling the rotation number of the cooling roller driven by the hydraulic motor, and meanwhile, the rotation number sensing device acquires the real-time rotation number PV of the cooling roller, so that the closed-loop state of the control process is realized.
In some embodiments, obtaining the real-time revolution number PV includes:
Step S102-1: the revolution sensor acquires a pulse signal of the revolution of the hydraulic motor, feeds back the pulse signal to the revolution meter, and converts the pulse signal into a real-time revolution PV.
Specifically, the revolution sensor sends pulse signals to the output shaft of the hydraulic motor, receives the pulse signals returned by the identification piece, simultaneously, the revolution sensor feeds the returned pulse signals back to the revolution meter in real time, the revolution meter receives and reads the pulse signals, converts the pulse signals into real-time revolution PV, and displays the real-time revolution PV through the display screen, so that operators can observe the revolution of the hydraulic motor conveniently.
In some embodiments, transmitting the first analog signal includes:
Step S102-2: the first analog signal is converted into a real-time revolution signal, and the real-time revolution signal is transmitted.
Specifically, after receiving the first analog signal, the analog input module performs analog conversion on the first analog signal, and obtains a real-time revolution signal which can be identified by the CPU module, so that the CPU module can compare the real-time revolution PV with the set revolution SV.
In some embodiments, transmitting the second analog signal includes:
Step S106-1: and receiving the real-time revolution number signal, converting the real-time revolution number signal into a second analog signal, and transmitting the second analog signal.
Specifically, the analog output module receives the real-time revolution signal, performs analog conversion on the real-time revolution signal to obtain a second analog signal which can be identified by the hydraulic motor system, and sends the second analog signal to control the hydraulic motor system. The second analog signal is a direct current voltage signal.
In some embodiments, a method of controlling the number of revolutions of a hydraulic motor according to a second analog signal includes:
Step S106-2: the proportional valve amplifier receives the second analog signal, converts the second analog signal into a hydraulic oil mass signal, and sends the hydraulic oil mass signal to the proportional valve.
Specifically, the proportional valve amplifier continuously receives the second analog signal sent by the analog output module, and converts the second analog signal into a hydraulic oil mass signal in real time, and the hydraulic oil mass signal is used for controlling the proportional valve to continuously and proportionally control the hydraulic oil flow in the hydraulic motor so as to continuously drive the hydraulic motor system to control the revolution of the cooling roller.
Step S106-3: the proportional valve receives the hydraulic oil quantity signal and controls the oil quantity in the hydraulic motor according to the hydraulic oil quantity signal so as to control the revolution of the hydraulic motor.
Specifically, after the proportional valve receives the hydraulic oil quantity signal, the opening is adjusted to be increased or decreased according to the hydraulic oil quantity signal, when the opening of the proportional valve is increased, the hydraulic oil flow is increased, and the number of revolutions of the cooling roller is increased; when the opening of the proportional valve is reduced, the flow rate of the hydraulic oil is reduced, and the number of rotations of the cooling roller is reduced, so that the real-time number of rotations PV of the cooling roller is stabilized at the set number of rotations SV.
In some embodiments, the second analog signal is linearly related to the amount of oil within the hydraulic motor.
It can be understood that in the control method for driving the cooling roller to rotate by the hydraulic motor system, the real-time revolution PV is directly adopted to track the set revolution SV, so that the closed-loop control of the revolution of the cooling roller is realized, the influence of the oil temperature of hydraulic oil and the load change of the hydraulic motor can be avoided, and the second analog signal and the oil quantity in the hydraulic motor are in a linear relation.
In some embodiments, the first analog signal is a current signal ranging from 4mA to 20mA, suitable for indicating the reading range of the meter; the second analog signal is a direct-current voltage signal, and the range is 0V to 5V, so that the second analog signal is suitable for the receiving range of the proportional valve amplifier. That is, the ranges of the current signal and the direct-current voltage signal can be adapted to the normal operation of the control device, and the accuracy of the rotation number of the cooling roller driven by the hydraulic motor system is improved.
Further, as a specific implementation of the control method shown in fig. 4, the present embodiment provides a control device 600 for driving a cooling roller to rotate by a hydraulic motor system, where the hydraulic motor system 50 includes:
The hydraulic motor is arranged in the vacuum smelting furnace and connected with the cooling roller, and the hydraulic motor is used for driving the cooling roller to rotate;
The revolution sensing device comprises a revolution sensor and a dial indicator, and is used for acquiring the revolution of the cooling roller;
And the proportional valve amplifier is electrically connected with the proportional valve and is used for controlling the proportional valve to adjust the flow of hydraulic oil.
As shown in fig. 5, the control device 600 includes:
The analog input module 610 acquires a real-time revolution number PV of the hydraulic motor, converts the real-time revolution number PV into a first analog signal, and transmits the first analog signal;
the CPU module 620 receives the first analog signal, compares the real-time rotation number PV with the set rotation number SV, and determines a control command for the hydraulic motor according to the comparison result of the real-time rotation number PV and the set rotation number SV;
the analog output module 630 transmits a second analog signal including a control command for controlling the number of revolutions of the hydraulic motor.
In some embodiments, obtaining the real-time revolution number PV includes:
the revolution sensor acquires a pulse signal of the revolution of the hydraulic motor, feeds back the pulse signal to the indication meter, and the indication meter converts the pulse signal into a real-time revolution PV.
In some embodiments, transmitting the first analog signal includes:
the analog input module 610 converts the first analog signal into a real-time revolution signal and transmits the real-time revolution signal.
In some embodiments, transmitting the second analog signal includes:
The CPU module 620 receives the real-time revolution signal, and the analog output module 630 converts the real-time revolution signal into a second analog signal and transmits the second analog signal.
In some embodiments, a method of controlling the number of revolutions of a hydraulic motor according to a second analog signal includes:
the proportional valve amplifier receives the second analog signal, converts the second analog signal into a hydraulic oil mass signal and sends the hydraulic oil mass signal to the proportional valve;
The proportional valve controls the oil quantity in the hydraulic motor according to the hydraulic oil quantity signal so as to control the revolution number of the hydraulic motor.
In some embodiments, the second analog signal is linearly related to the amount of oil within the hydraulic motor.
In some embodiments, the first analog signal is a current signal ranging from 4mA to 20mA; the second analog signal is a direct current voltage signal in the range of 0V to 5V.
Based on the control method shown in fig. 4, correspondingly, the embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the control method for driving the cooling roller to rotate by the hydraulic motor system shown in fig. 4. Because the computer program stored in the storage medium can execute any control method for driving the cooling roller to rotate by the hydraulic motor system, the control method has all the beneficial technical effects of the control method for driving the cooling roller to rotate by the hydraulic motor system, and the detailed description is omitted.
Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, where the software product may be stored in a non-volatile storage medium (may be a CD-ROM, a usb flash disk, a mobile hard disk, etc.), and includes several instructions for causing an electronic device (may be a mitsubishi Q-series PLC device, etc.) to execute the control method described in each implementation scenario of the present application.
The storage medium may also include an operating system, a network communication module. An operating system is a program that manages and saves electronic device hardware and software resources, supporting the execution of information handling programs, as well as other software and/or programs. The network communication module is used for realizing communication among all components in the storage medium and communication with other hardware and software in the entity equipment.
Based on the control method shown in fig. 4, in order to achieve the above objective, an embodiment of the present application further provides an electronic device 700, as shown in fig. 6, where the electronic device 700 includes a processor 710 and a memory 720; the memory 720 is used for storing operation instructions of a control method for driving the cooling roller to rotate by the hydraulic motor system; the processor 710 is configured to execute the control method for driving the cooling roller to rotate by the hydraulic motor system as shown in fig. 4 by calling the operation command.
It will be appreciated by those skilled in the art that the structure of the electronic device 700 provided in this embodiment is not limited to the electronic device 700, and may include more or fewer components, or may combine certain components, or may have a different arrangement of components.
It should be noted that the terms "first," "second," and the like in the description and in the claims are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that such uses may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those described herein. Furthermore, the terms "include" and variations thereof are to be interpreted as open-ended terms that mean "include, but are not limited to.
Those skilled in the art will appreciate that the drawing is merely a schematic illustration of a preferred implementation scenario and that the modules or flows in the drawing are not necessarily required to practice the application. Those skilled in the art will appreciate that modules in an apparatus in an implementation scenario may be distributed in an apparatus in an implementation scenario according to an implementation scenario description, or that corresponding changes may be located in one or more apparatuses different from the implementation scenario. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method for driving a cooling roller to rotate is characterized in that,
Driving the chill roll using a hydraulic motor system comprising:
the hydraulic motor is arranged in the vacuum smelting furnace and connected with the cooling roller, and the hydraulic motor is used for driving the cooling roller to rotate;
the revolution sensing device comprises a revolution sensor and a dial indicator, and is used for acquiring the revolution of the cooling roller;
the proportional valve amplifier is electrically connected with the proportional valve and is used for controlling the flow of the proportional valve;
The method comprises the following steps:
acquiring a real-time revolution number PV of the hydraulic motor, wherein the revolution number sensor acquires a pulse signal of the revolution number of the hydraulic motor, and feeds back the pulse signal to a count table to convert the pulse signal into the real-time revolution number PV;
converting the real-time revolution number PV into a first analog signal;
Transmitting the first analog signal, including converting the first analog signal into a real-time revolution signal, and transmitting the real-time revolution signal;
receiving the first analog signal, comparing the real-time revolution number PV with a set revolution number SV, and determining a control instruction for the hydraulic motor according to a comparison result of the real-time revolution number PV and the set revolution number SV, wherein after receiving the first analog signal, the real-time revolution number PV contained in the first analog signal is read, and whether the real-time revolution number PV of the cooling roller needs to be adjusted is judged according to an incomplete differential PID control method and the set revolution number SV;
transmitting a second analog signal including the control command, including receiving the real-time revolution signal, converting the real-time revolution signal into a second analog signal, and transmitting the second analog signal;
The revolution of the hydraulic motor is controlled according to the second analog signal, the revolution of the hydraulic motor is controlled by the proportional valve amplifier, the second analog signal is received by the proportional valve amplifier, the second analog signal is converted into a hydraulic oil quantity signal, the hydraulic oil quantity signal is sent to the proportional valve, and the oil quantity in the hydraulic motor is controlled by the proportional valve according to the hydraulic oil quantity signal so as to control the revolution of the hydraulic motor;
The first analog signal is a current signal, and the second analog signal is a direct current voltage signal.
2. The method of driving a chill roll in rotation of claim 1, wherein:
The second analog signal is in a linear relationship with the amount of oil within the hydraulic motor.
3. The method of driving a chill roll in rotation of claim 1, wherein:
The first analog signal ranges from 4mA to 20mA;
the second analog signal ranges from 0V to 5V.
4. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method of driving a cooling roller in rotation according to any one of the preceding claims 1 to 3.
5. An electronic device comprising a processor and a memory:
the memory is used for storing operation instructions;
the processor is configured to execute the method of driving the cooling roller to rotate according to any one of claims 1 to 3 by calling the operation instruction.
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