CN115823469A - Constant temperature control system for oil supply of cigarette making machine and constant temperature control method thereof - Google Patents

Abstract

The invention discloses a constant temperature control system and a constant temperature control method for oil supply of a cigarette making machine, wherein the system comprises: the oil supply unit comprises an oil pool oil temperature sensor, an oil pool liquid level sensor, an oil supply motor and an inlet oil pressure sensor; the oil temperature outlet detection unit comprises sensors for detecting the temperature of main shaft return oil, spider hand return oil, first brand box return oil, second brand box return oil, spiral return stems and chopper disk return oil; the constant temperature circulation unit comprises an oil temperature stirring motor, a constant temperature circulation motor, a semiconductor refrigerator, an axial flow fan, a condensation temperature sensor and a circulating pipeline return oil temperature sensor, wherein the semiconductor refrigerator comprises a condensation fin, a pipeline and a semiconductor. The constant temperature control system and the constant temperature control method for the oil supply of the cigarette making machine provided by the invention control the temperature of the lubricating oil within a reasonable range, keep the viscosity of the lubricating oil high-efficiently constant, reduce the abrasion of parts and prolong the service life of a sealing element.

Description

Constant temperature control system for oil supply of cigarette making machine and constant temperature control method thereof

Technical Field

The invention relates to the technical field of cigarette production, in particular to an oil supply constant temperature control system of a cigarette making machine and a constant temperature control method thereof.

Background

The cigarette making machine is used as a machine for producing and manufacturing cigarettes, the high-speed motion of the machine not only needs the driving of a motor, but also needs gears and bearings of internal parts of the machine to carry out precise matching transmission, various frictions among the parts generate a large amount of heat, and the functions of lubrication, heat dissipation and cooling are achieved through the circulation of lubricating oil. When the machine works for a long time, lubricating oil can accumulate heat continuously, so that the temperature is increased continuously, the abrasion of mechanical parts is accelerated, equipment failure is caused, meanwhile, the aging of a sealing ring is aggravated, oil leakage is caused, a cigarette is greasy, and serious quality accidents are caused; the adoption of the cooling device can cause the whole oil temperature to be lower, so that the viscosity is increased, the fluidity is reduced, and the equipment is damaged. The oil temperature not only affects the abrasion of transmission parts, but also affects the service life of a sealing element.

Therefore, a constant temperature control system for oil supply of a cigarette making machine and a constant temperature control method thereof are needed.

Disclosure of Invention

The invention aims to provide an oil supply constant temperature control system of a cigarette making machine and a constant temperature control method thereof, which are used for solving the problems in the prior art, controlling the temperature of lubricating oil within a reasonable range, keeping the viscosity of the lubricating oil high and constant, reducing the abrasion of parts, prolonging the service life of a sealing part and enabling the operation of equipment to be more stable.

The invention provides an oil supply constant temperature control system of a cigarette making machine, which comprises:

oil bath, fuel feeding unit, oil temperature export detecting element, constant temperature circulation unit and control module, wherein:

the oil pool is divided into an oil supply area and a constant-temperature circulation area by a partition plate, and the oil supply area is communicated with the constant-temperature circulation area by the bottom of the partition plate;

the oil supply unit comprises an oil pool oil temperature sensor, an oil pool liquid level sensor, an oil supply motor and an inlet oil pressure sensor, wherein the oil pool oil temperature sensor is arranged on the left side of the oil pool and used for detecting the oil temperature of an oil supply area;

the oil temperature outlet detection unit comprises a main shaft oil return temperature sensor, a spider hand oil return temperature sensor, a first brand box oil return temperature sensor, a second brand box oil return temperature sensor, a spiral return stem and a chopper disc oil return temperature sensor;

the constant-temperature circulation unit comprises an oil temperature stirring motor, a constant-temperature circulation motor, a semiconductor refrigerator, an axial fan, a condensation temperature sensor and a circulation pipeline oil return temperature sensor, the oil temperature stirring motor and the constant-temperature circulation motor are arranged on an oil pool cover plate of a constant-temperature circulation area, the semiconductor refrigerator comprises a condensation fin, a pipeline and a semiconductor, the pipeline is wound on the condensation fin, the semiconductor is fixed on the condensation fin in a patch mode to conduct cold or heat generated by the semiconductor to the condensation fin, the axial fan is arranged at the rear end of the condensation fin on the side of the semiconductor to conduct the cold or heat emitted by the semiconductor to the condensation fin in an accelerated mode, the condensation temperature sensor is arranged in the condensation fin, and the circulation pipeline oil return temperature sensor is arranged on a circulation oil return pipe far away from one side of the semiconductor refrigerator;

the control module is respectively connected with the oil supply motor, the oil temperature stirring motor and the constant temperature circulating motor and used for controlling the oil supply motor, the oil temperature stirring motor and the constant temperature circulating motor to operate at a speed-regulating speed according to the detection results of the oil supply unit, the oil temperature outlet detection unit and the constant temperature circulating unit.

The oil supply constant temperature control system of the cigarette making machine is characterized in that the control module is a PLC (programmable logic controller) and is provided with a Profibus port, and the control module is respectively connected with the oil supply motor, the oil temperature stirring motor and the frequency converter of the constant temperature circulating motor through the Profibus port so as to control the oil supply motor, the oil temperature stirring motor and the constant temperature circulating motor to operate at a speed regulated mode through a bus.

The oil supply constant temperature control system for the cigarette making machine as described above, wherein preferably, the oil supply constant temperature control system for the cigarette making machine further comprises an input/output module respectively connected with the oil supply unit, the oil temperature outlet detection unit, the constant temperature circulation unit and the control module,

the input and output module comprises an analog quantity input module, an analog quantity output module, a digital quantity input module and a digital quantity output module, wherein:

the analog quantity input module is respectively connected with the oil pool liquid level sensor, the oil pool oil temperature sensor, the inlet oil pressure sensor, the main shaft oil return temperature sensor, the spider hand oil return temperature sensor, the first brand sub-box oil return temperature sensor, the second brand sub-box oil return temperature sensor, the spiral return stem and riving knife disc oil return temperature sensor, the condensation temperature sensor and the circulating pipeline oil return temperature sensor, and is used for acquiring 0-10V voltage signals of the sensors and converting the voltage signals into 0-32000 data signals so as to provide the data signals for the control module to calculate data;

the analog quantity output module is used for converting the data calculated by the control module into a voltage signal of 0-10V and controlling the temperature of the semiconductor refrigerator through a current regulating control module;

the digital quantity input module is used for acquiring an operation signal of the auxiliary drive of the cigarette making machine;

the digital output module is used for controlling the temperature reversal of the semiconductor refrigerator 14 and the operation of the axial flow fan.

The oil supply constant temperature control system for the cigarette making machine as described above, wherein preferably, the oil supply constant temperature control system for the cigarette making machine further comprises a human-computer interaction module for feeding back the control condition of the whole oil temperature in real time through a curve graph and reflecting the alarm information in the oil temperature control.

The invention also provides a cigarette making machine oil supply constant temperature control method adopting the system, which comprises the following steps:

s1, starting auxiliary driving of a cigarette making machine, detecting oil temperature of an oil supply area through an oil pool oil temperature sensor, sending an oil temperature detection result to a control module, detecting the height of the liquid level of an oil pool through an oil pool liquid level sensor, and sending a liquid level detection result to the control module; the control module judges whether the oil temperature of the oil pool detected by the oil pool oil temperature sensor is between a first temperature threshold and a second temperature threshold and whether the liquid level of the oil pool detected by the oil pool liquid level sensor is greater than or equal to a preset liquid level threshold, wherein the first temperature threshold is smaller than the second temperature threshold;

s2, if the condition is not met, the auxiliary drive cannot be started; if so, the control module controls the oil supply motor to supply oil at a preset oil supply starting frequency and controls the oil temperature stirring motor to stir at a preset stirring starting frequency;

s3, detecting the oil supply pressure of the pipeline through an inlet oil pressure sensor, and sending an oil supply pressure detection result to a control module, wherein the control module adjusts the rotating speed of an oil supply motor through a frequency converter according to the oil supply pressure detection result so as to adjust the oil supply pressure;

s4, detecting the oil temperature of an oil supply area through an oil pool oil temperature sensor, sending an oil temperature detection result to the control module, and judging whether the oil temperature of the oil pool detected by the oil pool oil temperature sensor is between a first temperature threshold value and a second temperature threshold value or not by the control module;

step S5, if yes, returning to the step S4, if not, sequentially judging whether the main shaft oil return temperature detected by a main shaft oil return temperature sensor, the spider hand oil return temperature detected by the spider hand oil return temperature sensor, the first brand box oil return temperature detected by a first brand box oil return temperature sensor, the second brand box oil return temperature detected by a second brand box oil return temperature sensor, the spiral return stem detected by the spiral return stem and the chopper disk oil return temperature sensor and the chopper disk oil return temperature are smaller than a first temperature threshold value or larger than a second temperature threshold value or not by a control module, and recording data;

s6, judging whether the oil temperature of the oil pool detected by the oil pool oil temperature sensor is smaller than a first temperature threshold value or larger than a second temperature threshold value by a control module;

and S7, selecting the lowest item or the highest item of the main shaft oil return temperature, the spider hand oil return temperature, the first brand box oil return temperature, the second brand box oil return temperature, the spiral return stem and the chopper disk oil return temperature as reference temperatures according to the oil temperature of the oil pool and the first temperature threshold or the second temperature threshold, adjusting the rotating speed of an oil pool stirring motor by a control module through a frequency converter, and controlling the semiconductor refrigerator to be heated or refrigerated to the regulation and control temperature by a controller according to the reference temperatures.

As above, the cigarette making machine oil supply thermostatic control method, preferably, in step S3, the control module adjusts the rotation speed of the oil supply motor through the frequency converter according to the oil inlet pressure detection result to adjust the oil supply pressure, and specifically includes:

if the oil inlet pressure is smaller than a first preset pressure threshold value, the frequency of the oil supply motor is increased by a first preset amplitude through the frequency converter, so that the rotating speed of the oil supply motor is increased by the first preset amplitude;

if the oil inlet pressure is greater than or equal to a second preset pressure threshold value, the frequency of the oil supply motor is reduced by a second preset amplitude through the frequency converter, so that the rotating speed of the oil supply motor is reduced by the second preset amplitude;

if the oil inlet pressure is between a second preset pressure threshold and a second preset pressure threshold, maintaining the frequency of the oil supply motor constant;

and after the preset time, returning to the step of judging the oil inlet pressure.

As described above, preferably, in the step S5, the control module sequentially determines whether the oil return temperature of the main shaft detected by the main shaft oil return temperature sensor 7, the oil return temperature of the spider hand detected by the spider hand oil return temperature sensor 8, the oil return temperature of the first brand box detected by the first brand box oil return temperature sensor 9, the oil return temperature of the second brand box detected by the second brand box oil return temperature sensor 10, and the oil return temperature of the spiral stem and the chopper disk detected by the spiral stem and chopper disk oil return temperature sensor 11 are less than a first temperature threshold or greater than a second temperature threshold, and records data, and specifically includes:

recording the current oil temperature of the oil pool through a register 0 in the control module, and if the oil temperature of the oil pool is greater than a second temperature threshold value or less than a first temperature threshold value;

and gradually judging whether the oil return temperature of the main shaft, the spider hand, the first brand box, the second brand box, the spiral return stem and the riving knife disc is greater than a second temperature threshold or less than a first temperature threshold, and respectively recording the corresponding oil return temperatures in a register 1, a register 2, a register 3, a register 4 and a register 5 in the control module.

The method for controlling the oil supply constant temperature of the cigarette making machine as described above, wherein preferably, when the oil temperature of the oil sump is less than the first temperature threshold, the step S7 selects the lowest item or the highest item of the oil return temperature of the main shaft, the spider hand oil return temperature, the first brand sub-box oil return temperature, the second brand sub-box oil return temperature, the spiral return stem and the chopper disk oil return temperature as the reference temperature according to the oil temperature of the oil sump and the first temperature threshold or the second temperature threshold, the control module adjusts the rotation speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor refrigerator to be heated or cooled to the regulation and control temperature according to the reference temperature, specifically comprising:

step S71, if the oil temperature of the oil pool is less than a first temperature threshold value, selecting the lowest item of a main shaft oil return temperature, a spider hand oil return temperature, a first brand box oil return temperature, a second brand box oil return temperature, a spiral return stem and a chopper wheel oil return temperature as a reference temperature;

step S72, the control module raises the rotating speed of an oil pool stirring motor through a frequency converter;

s73, controlling the semiconductor refrigerator to be heated to a regulation temperature by the controller according to the reference temperature;

s74, operating the constant-temperature circulating motor at a constant frequency of 20 Hz;

and step S75, judging whether the oil temperature of the circulating pipeline is between the first temperature threshold and the second temperature threshold, if not, making up according to the difference value between the heating temperature and the temperature of the circulating pipeline, and returning to the step S73.

The method for controlling the constant temperature of the oil supply for the cigarette making machine as described above, wherein preferably, the step S71 of selecting the lowest item of the main shaft oil return temperature, the spider hand oil return temperature, the first brand of box oil return temperature, the second brand of box oil return temperature, the spiral return stem and the chopper wheel oil return temperature as the reference temperature specifically includes:

the temperature data in the registers 1 to 5 are compared, the minimum temperature is used as a reference value Tda,

step S73, the controller controls the semiconductor refrigerator to be heated to the regulation temperature according to the reference temperature, and specifically includes:

the temperature heating point to be reached is calculated by the following formula,

wherein Tam represents a normal constant temperature, tda represents a reference temperature, tmax represents a second temperature threshold value, tmin represents a first temperature threshold value, tou represents a circulating pipeline return oil temperature, tin represents a semiconductor refrigerator temperature, and To represents a temperature heating point required To be reached;

the semiconductor refrigerator performs heating work, temperature heating regulation and control are performed through the following formula,

wherein kp represents a proportionality coefficient ranging from a high temperature to a low temperature, ti represents a response time coefficient approaching the low temperature range, and Td represents a pre-conditioning time coefficient approaching the low temperature range.

The method for controlling the oil supply constant temperature of the cigarette making machine as described above, wherein preferably, when the oil temperature of the oil sump is less than the first temperature threshold, the step S7 selects the lowest item or the highest item of the oil return temperature of the main shaft, the spider hand oil return temperature, the first brand sub-box oil return temperature, the second brand sub-box oil return temperature, the spiral return stem and the chopper disk oil return temperature as the reference temperature according to the oil temperature of the oil sump and the first temperature threshold or the second temperature threshold, the control module adjusts the rotation speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor refrigerator to be heated or cooled to the regulation and control temperature according to the reference temperature, specifically comprising:

s71-1, if the oil temperature of the oil pool is greater than a second temperature threshold value, selecting the highest item of the main shaft oil return temperature, the spider hand oil return temperature, the first brand box oil return temperature, the second brand box oil return temperature, the spiral return stem and the chopper disk oil return temperature as a reference temperature;

s72-1, judging whether the difference value between the reference temperature and the second temperature threshold value is larger than a preset temperature difference threshold value or not by the control module, and if so, reducing the rotating speed of an oil pool stirring motor by the control module through a frequency converter;

s73-1, controlling the semiconductor refrigerator to refrigerate to a regulation temperature by the controller according to the reference temperature;

s74-1, operating the constant-temperature circulating motor at a constant frequency of 30Hz, increasing the frequency by 1Hz when the oil temperature of the oil pool increases by 1 ℃, and operating at the highest frequency if the oil temperature of the oil pool exceeds a third temperature threshold value;

step 75-1, judging whether the oil temperature of the circulating pipeline is between the first temperature threshold value and the second temperature threshold value, if not, making up according to the difference value between the refrigeration temperature and the temperature of the circulating pipeline, returning to the step S73-1,

when the oil temperature of the oil pool is greater than the second temperature threshold value, the step S71-1 of selecting the highest item of the oil return temperature of the main shaft, the oil return temperature of the spider hand, the oil return temperature of the first brand box, the oil return temperature of the second brand box, the oil return temperature of the spiral return stem and the oil return temperature of the riving knife disc as a reference temperature specifically includes:

the temperature data in the registers 1 to 5 are compared, the maximum temperature data is used as a reference value Tda,

step S73-1, the controller controls the semiconductor refrigerator to refrigerate to the regulation temperature according to the reference temperature, and the method specifically comprises the following steps:

the temperature refrigerating point required to be reached is calculated by the following formula,

wherein Tam represents a normal constant temperature, tda represents a reference temperature, tmax represents a second temperature threshold value, tmin represents a first temperature threshold value, tou represents a circulation pipeline return oil temperature, tin represents a semiconductor refrigerator temperature, and To represents a temperature refrigerating point required To be reached;

the semiconductor refrigerator carries out refrigeration work, carries out temperature refrigeration regulation and control through the following formula,

wherein kp represents a proportionality coefficient ranging from a high temperature to a low temperature, ti represents a response time coefficient approaching a low temperature range, td represents a pre-regulation time coefficient approaching a low temperature range,

step S74-1, the constant-temperature circulation motor operates at a constant frequency of 30Hz, and the frequency increases by 1Hz for every 1 ℃ increase in the oil temperature of the oil sump, and operates at the highest frequency if the oil temperature of the oil sump exceeds a third temperature threshold, specifically including:

and (3) operating the constant-temperature circulating motor at a reference frequency of 30Hz, taking the difference obtained by subtracting the second temperature threshold from the reference temperature Tda as the number of hertz of the frequency rise of the constant-temperature circulating motor, operating the constant-temperature circulating motor at the highest frequency when the oil temperature of the oil pool is greater than or equal to 65 ℃, and performing temperature acquisition regulation and control again after 5s of time delay when the oil return temperature of the feedback circulating pipeline reaches a constant temperature range.

The constant temperature control system and the constant temperature control method for the oil supply of the cigarette making machine can ensure the constancy of oil temperature control, obviously reduce the temperature of each lubricating part of equipment, improve the abrasion condition of parts at the parts, prolong the service life of a sealing element, reduce the maintenance time of the equipment, improve the effective operation rate of the equipment and reduce the occurrence of cigarette quality accidents; the working is stable and reliable, the temperature of the lubricating oil is kept in the most effective range, the service life of a sealing element is obviously prolonged, the risk of cigarette pollution is reduced, the overhaul time of equipment is effectively shortened, the effective operation rate of the equipment is improved, the consumption of spare and accessory parts is reduced, and the overall benefit is improved; reduces the risk of cigarette pollution and has better market application prospect.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of an embodiment of a constant temperature control system for supplying oil to a cigarette making machine according to the present invention;

FIG. 2 is a control schematic diagram of the constant temperature control system for the oil supply of the cigarette making machine provided by the invention;

FIG. 3 is a flow chart of an embodiment of a method for controlling the constant temperature of the supplied oil of a cigarette making machine according to the present invention;

FIG. 4 is a logic diagram of adjusting the oil inlet pressure in the embodiment of the constant temperature control method for supplying oil to the cigarette making machine provided by the invention;

FIG. 5 is a logic diagram of an embodiment of a method for controlling the constant temperature of the cigarette making machine fuel supply provided by the present invention.

Description of reference numerals: 1-an oil pool oil temperature sensor, 2-an oil pool liquid level sensor, 3-an oil supply motor, 4-an oil temperature stirring motor, 5-an inlet oil pressure sensor, 6-a constant temperature circulating motor, 7-a main shaft return oil temperature sensor, 8-a spider hand return oil temperature sensor, 9-a first brand sub-box return oil temperature sensor, 10-a second brand sub-box return oil temperature sensor, 111-a spiral return stem and chopper disc return oil temperature sensor, 12-an axial fan, 13-a condensation temperature sensor, 14-a semiconductor refrigerator, 15-a circulating pipeline return oil temperature sensor, 16-an oil supply area and 17-a constant temperature circulating area.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not restrictive, unless specifically stated otherwise.

As used in this disclosure, "first", "second": and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific component is described as being positioned between a first component and a second component, there may or may not be an intervening component between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without having an intervening component, or may be directly connected to the other components without having an intervening component.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

As shown in fig. 1, the oil supply thermostatic control system for the cigarette making machine provided by the embodiment includes: oil bath, fuel feeding unit, oil temperature export detecting element, constant temperature circulation unit and control module, wherein:

the oil pool is divided into an oil supply area 16 and a constant temperature circulation area 17 by a partition plate, and the oil supply area 16 is communicated with the constant temperature circulation area 17 by the bottom of the partition plate;

the oil supply unit comprises an oil pool oil temperature sensor 1, an oil pool liquid level sensor 2, an oil supply motor 3 and an inlet oil pressure sensor 5, wherein the oil pool oil temperature sensor 1 is arranged on the left side of the oil pool and used for detecting the oil temperature of an oil supply area, the oil pool liquid level sensor 2 is arranged above an oil pool cover plate and used for detecting the liquid level of the oil pool, the oil supply motor 3 is arranged on the oil pool cover plate of the oil supply area and used for supplying oil for the operation of a machine, and the inlet oil pressure sensor 5 is arranged on a pipeline of an oil supply inlet and used for detecting the oil supply pressure of the pipeline and adjusting the oil supply pressure by adjusting the rotating speed of the oil supply motor 3 so as to keep the oil supply pressure constant;

the oil temperature outlet detection unit comprises a main shaft oil return temperature sensor 7, a spider hand oil return temperature sensor 8, a first brand oil return temperature sensor 9, a second brand oil return temperature sensor 10 and a spiral return stem and chopper disc oil return temperature sensor 11;

the constant temperature circulation unit comprises an oil temperature stirring motor 4, a constant temperature circulation motor 6, a semiconductor refrigerator 14, an axial flow fan 12, a condensation temperature sensor 13 and a circulation pipeline oil return temperature sensor 15, wherein the oil temperature stirring motor 4 and the constant temperature circulation motor 6 are arranged on an oil tank cover plate of a constant temperature circulation area 17, the semiconductor refrigerator 14 comprises condensation fins, pipelines and semiconductors, the pipelines are wound on the condensation fins, the semiconductors are fixed on the condensation fins in a patch mode to conduct cold or heat generated by the semiconductors to the condensation fins, the axial flow fan 12 is arranged at the rear end of the condensation fins on the semiconductor side to accelerate conduction of the cold or heat emitted by the semiconductors to the condensation fins, the condensation temperature sensor 13 is arranged in the condensation fins, and the circulation pipeline oil return temperature sensor 15 is arranged on a circulation oil return pipe on the side far away from the semiconductor refrigerator 14;

the control module is respectively connected with the oil supply motor 3, the oil temperature stirring motor 4 and the constant temperature circulating motor 6 and is used for controlling the speed regulation operation of the oil supply motor 3, the oil temperature stirring motor 4 and the constant temperature circulating motor 6 according to the detection results of the oil supply unit, the oil temperature outlet detection unit and the constant temperature circulating unit.

As shown in fig. 2, the control module is a PLC controller and has Profibus ports, and is connected to the oil supply motor 3, the oil temperature stirring motor 4, and the frequency converter of the constant temperature circulation motor 6 through the Profibus ports, respectively, so as to control the speed regulation operation of the oil supply motor 3, the oil temperature stirring motor 4, and the constant temperature circulation motor 6 in a bus mode.

Further, as shown in fig. 2, the oil supply constant temperature control system of the cigarette making machine further comprises an input/output module respectively connected with the oil supply unit, the oil temperature outlet detection unit, the constant temperature circulation unit and the control module,

the input and output module comprises an analog quantity input module, an analog quantity output module, a digital quantity input module and a digital quantity output module, wherein:

the analog quantity input module is respectively connected with the oil pool liquid level sensor 2, the oil pool oil temperature sensor 1, the inlet oil pressure sensor 5, the main shaft oil return temperature sensor 7, the spider hand oil return temperature sensor 8, the first brand oil return temperature sensor 9, the second brand oil return temperature sensor 10, the spiral loop stem and chopper disk oil return temperature sensor 11, the condensation temperature sensor 13 and the circulating pipeline oil return temperature sensor 15, and is used for acquiring voltage signals of 0-10V of each sensor, converting the voltage signals into data signals of 0-32000 and providing the data signals to the control module for data calculation;

the analog quantity output module is used for converting the data calculated by the control module into a voltage signal of 0-10V and controlling the temperature of the semiconductor refrigerator 14 through a current regulating control module;

the digital quantity input module is used for acquiring an operation signal of auxiliary drive of the cigarette making machine;

the digital output module is used for controlling the temperature reversal of the semiconductor refrigerator 14 and the operation of the axial flow fan 12.

Furthermore, the cigarette making machine oil supply constant temperature control system further comprises a human-computer interaction module which is used for feeding back the control condition of the whole oil temperature in real time through a curve chart and reflecting alarm information in oil temperature control.

Correspondingly, as shown in fig. 3 to 5, the method for controlling the constant temperature of the supplied oil of the cigarette making machine provided by the embodiment specifically includes the following steps in an actual implementation process:

s1, as shown in a figure 4, starting auxiliary driving of the cigarette making machine, detecting oil temperature of an oil supply area through an oil pool oil temperature sensor, sending an oil temperature detection result to a control module, detecting the height of an oil pool liquid level through an oil pool liquid level sensor, and sending a liquid level detection result to the control module; the control module judges whether the oil temperature of the oil pool detected by the oil pool oil temperature sensor is between a first temperature threshold (for example, 35 ℃) and a second temperature threshold (for example, 45 ℃) and whether the oil pool liquid level detected by the oil pool liquid level sensor is greater than or equal to a preset liquid level threshold (for example, 50%), wherein the first temperature threshold is smaller than the second temperature threshold.

S2, if the condition is not met, the auxiliary drive cannot be started; if yes, the control module controls the oil supply motor to supply oil at a preset oil supply starting frequency (for example, 25 Hz), and controls the oil temperature stirring motor to stir at a preset stirring starting frequency (for example, 15 Hz).

And S3, detecting the oil supply pressure of the pipeline through the inlet oil pressure sensor 5, sending an oil inlet pressure detection result to the control module, and adjusting the rotating speed of the oil supply motor 3 through the frequency converter by the control module according to the oil inlet pressure detection result so as to adjust the oil supply pressure.

In an embodiment of the method for controlling a constant temperature of a cigarette making machine fueling according to the present invention, the step S3 may specifically include:

step S31, if the oil inlet pressure is smaller than a first preset pressure threshold (for example, 0.2 MPa), increasing the frequency of the oil supply motor by a first preset amplitude (for example, 5%) through the frequency converter, so as to increase the rotation speed of the oil supply motor by the first preset amplitude.

And step S32, if the oil inlet pressure is greater than or equal to a second preset pressure threshold (for example, 0.35 MPa), reducing the frequency of the oil supply motor by a second preset amplitude (for example, 5%) through the frequency converter, so that the rotating speed of the oil supply motor is reduced by the second preset amplitude.

The first preset amplitude and the second preset amplitude may be the same or different, and the present invention is not limited to this specifically.

And S33, if the oil inlet pressure is between the second preset pressure threshold and the second preset pressure threshold, maintaining the frequency of the oil supply motor constant.

And step S34, after the preset time (for example, 10S) passes, returning to the step of judging the oil inlet pressure.

And S4, as shown in FIG. 5, detecting the oil temperature of the oil supply area through the oil pool oil temperature sensor 1, sending the oil temperature detection result to the control module, and judging whether the oil temperature of the oil pool detected by the oil pool oil temperature sensor is between a first temperature threshold value and a second temperature threshold value by the control module.

And S5, if so, returning to the step S4, otherwise, sequentially judging whether the main shaft oil return temperature detected by the main shaft oil return temperature sensor 7, the spider hand oil return temperature detected by the spider hand oil return temperature sensor 8, the first brand box oil return temperature detected by the first brand box oil return temperature sensor 9, the second brand box oil return temperature detected by the second brand box oil return temperature sensor 10, and the spiral return stem and the chopper disk oil return temperature detected by the spiral return stem and chopper disk oil return temperature sensor 11 are smaller than a first temperature threshold value or larger than a second temperature threshold value, and recording data.

As shown in fig. 5, in an embodiment of the method for controlling the fueling thermostat of the cigarette making machine according to the present invention, the step S5 may specifically include:

and S51, recording the current oil temperature of the oil pool through a register 0 in the control module, wherein if the oil temperature of the oil pool is greater than a second temperature threshold value (45 ℃) or less than a first temperature threshold value (35 ℃).

And S52, gradually judging whether the main shaft oil return temperature, the spider hand oil return temperature, the first brand sub-box oil return temperature, the second brand sub-box oil return temperature, the spiral return stem and the riving knife disc oil return temperature are greater than a second temperature threshold (45 ℃) or less than a first temperature threshold (35 ℃), and respectively recording the corresponding oil return temperatures in a register 1, a register 2, a register 3, a register 4 and a register 5 in the control module.

And S6, judging whether the oil temperature of the oil pool detected by the oil temperature sensor 1 of the oil pool is smaller than a first temperature threshold value (35 ℃) or larger than a second temperature threshold value (45 ℃) by a control module.

And S7, selecting the lowest item or the highest item of the main shaft oil return temperature, the spider hand oil return temperature, the first brand box oil return temperature, the second brand box oil return temperature, the spiral return peduncle and the chopper disk oil return temperature as reference temperatures according to the oil temperature of the oil pool and the first temperature threshold (35 ℃) or the second temperature threshold (45 ℃), adjusting the rotating speed of a stirring motor of the oil pool by a control module through a frequency converter, and controlling the semiconductor refrigerator to be heated or refrigerated to the regulation and control temperature by a controller according to the reference temperatures.

In an embodiment of the method for controlling the constant temperature of the oil supply of the cigarette making machine according to the present invention, when the oil temperature of the oil sump is less than the first temperature threshold, the step S7 may specifically include:

and S71, if the oil temperature of the oil pool is less than a first temperature threshold (35 ℃), selecting the lowest item of the main shaft oil return temperature, the spider hand oil return temperature, the first brand box oil return temperature, the second brand box oil return temperature, the spiral return stem and the chopper disk oil return temperature as a reference temperature.

Specifically, the temperature data in the registers 1 to 5 are compared, and the minimum temperature is set as the reference value Tda.

And step S72, the control module raises the rotating speed of the oil pool stirring motor through a frequency converter.

And S73, controlling the semiconductor refrigerator to be heated to the regulation temperature by the controller according to the reference temperature.

In an embodiment of the method for controlling the constant temperature of the cigarette making machine oil supply of the present invention, the step S73 may specifically include:

step S731, calculating a temperature heating point to be reached by the following formula,

where Tam denotes a normal constant temperature, tda denotes a reference temperature, tmax denotes a second temperature threshold value, tmin denotes a first temperature threshold value, tou denotes a circulation line return oil temperature, tin denotes a semiconductor cooler temperature, and To denotes a temperature heating point that needs To be reached.

Step S732, the semiconductor refrigerator performs heating operation, performs temperature heating control according to the following formula,

wherein kp represents a proportionality coefficient ranging from a high temperature to a low temperature, ti represents a response time coefficient approaching the low temperature range, and Td represents a pre-conditioning time coefficient approaching the low temperature range. It should be noted that kp is related to the selected cooling material, ti and Td need to be obtained by trial and error adjustment in debugging, and are not specific values, and different device characteristics are different, and corresponding values are also different.

And step S74, operating the constant-temperature circulating motor at a constant frequency of 20 Hz.

When the oil return temperature of the feedback circulation pipeline reaches the constant temperature range, the temperature acquisition and control are carried out again after 5s of time delay.

And step S75, judging whether the oil temperature of the circulating pipeline is between a first temperature threshold (35 ℃) and a second temperature threshold (45 ℃), if not, making up according to the difference value between the heating temperature and the temperature of the circulating pipeline, and returning to the step S73.

In an embodiment of the method for controlling the constant temperature of the oil supply of the cigarette making machine according to the present invention, when the oil temperature of the oil sump is greater than the second temperature threshold, the step S7 may specifically include:

and S71-1, if the oil temperature of the oil pool is greater than a second temperature threshold value (45 ℃), selecting the highest item of the main shaft oil return temperature, the spider hand oil return temperature, the first brand box oil return temperature, the second brand box oil return temperature, the spiral return stem and the chopper wheel oil return temperature as a reference temperature.

Specifically, the temperature data in the registers 1 to 5 are compared, and the maximum temperature data is set as the reference value Tda.

And S72-1, judging whether the difference value between the reference temperature and the second temperature threshold value is larger than a preset temperature difference threshold value by the control module, and if so, reducing the rotating speed of the oil pool stirring motor by the control module through the frequency converter (for example, the reduction amplitude is 10%).

And S73-1, controlling the semiconductor refrigerator to refrigerate to the regulation temperature by the controller according to the reference temperature.

In an embodiment of the method for controlling the constant temperature of the cigarette making machine fueling of the present invention, the step S73-1 may specifically include:

step S73-11, calculating the temperature refrigerating point required to be reached through the following formula,

where Tam denotes a normal constant temperature, tda denotes a reference temperature, tmax denotes a second temperature threshold value, tmin denotes a first temperature threshold value, tou denotes a circulation line return oil temperature, tin denotes a semiconductor cooler temperature, and To denotes a temperature cooling point that needs To be reached.

Step S73-12, the semiconductor refrigerator carries out refrigeration work, temperature refrigeration regulation and control are carried out through the following formula,

wherein kp represents a proportionality coefficient ranging from a high temperature to a low temperature, ti represents a response time coefficient approaching the low temperature range, and Td represents a pre-conditioning time coefficient approaching the low temperature range.

And S74-1, operating the constant-temperature circulating motor at a constant frequency of 30Hz, increasing the frequency by 1Hz when the oil temperature of the oil pool increases by 1 ℃, and operating at the highest frequency when the oil temperature of the oil pool exceeds a third temperature threshold (for example, 5 ℃).

Specifically, the constant-temperature circulating motor runs at a reference frequency of 30Hz, a difference value obtained by subtracting the second temperature threshold value from the reference temperature Tda is used as the number of hertz of frequency rise of the constant-temperature circulating motor, when the oil temperature of the oil pool is greater than or equal to 65 ℃, the constant-temperature circulating motor runs at the highest frequency, and when the oil return temperature of the feedback circulating pipeline reaches a constant temperature range, temperature acquisition regulation and control are carried out again after 5s of time delay.

And 75-1, judging whether the oil temperature of the circulating pipeline is between the first temperature threshold and the second temperature threshold, if not, making up according to the difference value between the refrigeration temperature and the temperature of the circulating pipeline, and returning to the step S73-1.

Further, in some embodiments of the present invention, the method for controlling the constant temperature of the oil supply of the cigarette making machine further comprises:

and S8, under the condition that the auxiliary drive cannot be started, the control module controls the human-computer interaction module to give an alarm and display fault information.

The constant temperature control system and the constant temperature control method for the oil supply of the cigarette making machine provided by the embodiment of the invention can ensure the constancy of oil temperature control, obviously reduce the temperature of each lubricating part of equipment, improve the abrasion condition of parts at the parts, prolong the service life of a sealing element, reduce the maintenance time of the equipment, improve the effective operation rate of the equipment and reduce the occurrence of cigarette quality accidents; the working is stable and reliable, the temperature of the lubricating oil is kept in the most effective range, the service life of a sealing element is obviously prolonged, the risk of cigarette pollution is reduced, the overhaul time of equipment is effectively shortened, the effective operation rate of the equipment is improved, the consumption of spare and accessory parts is reduced, and the overall benefit is improved; reduces the risk of cigarette pollution and has better market application prospect.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (10)

1. The utility model provides a cigarette machine fuel feeding thermostatic control system which characterized in that includes:

oil bath, fuel feeding unit, oil temperature export detecting element, constant temperature circulation unit and control module, wherein:

the oil pool is divided into an oil supply area and a constant-temperature circulation area by a partition plate, and the oil supply area is communicated with the constant-temperature circulation area by the bottom of the partition plate;

the oil supply unit comprises an oil pool oil temperature sensor, an oil pool liquid level sensor, an oil supply motor and an inlet oil pressure sensor, wherein the oil pool oil temperature sensor is arranged on the left side of the oil pool and used for detecting the oil temperature of an oil supply area;

the oil temperature outlet detection unit comprises a main shaft oil return temperature sensor, a spider hand oil return temperature sensor, a first brand box oil return temperature sensor, a second brand box oil return temperature sensor, a spiral return stem and a chopper wheel oil return temperature sensor;

the constant-temperature circulation unit comprises an oil temperature stirring motor, a constant-temperature circulation motor, a semiconductor refrigerator, an axial fan, a condensation temperature sensor and a circulation pipeline oil return temperature sensor, the oil temperature stirring motor and the constant-temperature circulation motor are arranged on an oil pool cover plate of a constant-temperature circulation area, the semiconductor refrigerator comprises a condensation fin, a pipeline and a semiconductor, the pipeline is wound on the condensation fin, the semiconductor is fixed on the condensation fin in a patch mode to conduct cold or heat generated by the semiconductor to the condensation fin, the axial fan is arranged at the rear end of the condensation fin on the side of the semiconductor to conduct the cold or heat emitted by the semiconductor to the condensation fin in an accelerated mode, the condensation temperature sensor is arranged in the condensation fin, and the circulation pipeline oil return temperature sensor is arranged on a circulation oil return pipe far away from one side of the semiconductor refrigerator;

the control module is respectively connected with the oil supply motor, the oil temperature stirring motor and the constant temperature circulating motor and used for controlling the oil supply motor, the oil temperature stirring motor and the constant temperature circulating motor to operate at a speed-regulating speed according to the detection results of the oil supply unit, the oil temperature outlet detection unit and the constant temperature circulating unit.

2. The system as claimed in claim 1, wherein the control module is a PLC controller and has Profibus ports, and is connected to the frequency converters of the oil supply motor, the oil temperature stirring motor and the thermostatic circulation motor through the Profibus ports, respectively, so as to control the speed regulation operation of the oil supply motor, the oil temperature stirring motor and the thermostatic circulation motor in a bus mode.

3. The cigarette making machine oil supply thermostatic control system according to claim 1, further comprising an input and output module respectively connected to the oil supply unit, the oil temperature outlet detection unit, the thermostatic circulation unit and the control module,

the input and output module comprises an analog quantity input module, an analog quantity output module, a digital quantity input module and a digital quantity output module, wherein:

the analog quantity input module is respectively connected with the oil pool liquid level sensor, the oil pool oil temperature sensor, the inlet oil pressure sensor, the main shaft oil return temperature sensor, the spider hand oil return temperature sensor, the first brand sub-box oil return temperature sensor, the second brand sub-box oil return temperature sensor, the spiral return stem and riving knife disc oil return temperature sensor, the condensation temperature sensor and the circulating pipeline oil return temperature sensor, and is used for acquiring 0-10V voltage signals of the sensors and converting the voltage signals into 0-32000 data signals so as to provide the data signals for the control module to calculate data;

the analog quantity output module is used for converting the data calculated by the control module into a voltage signal of 0-10V and controlling the temperature of the semiconductor refrigerator through the current regulating control module;

the digital quantity input module is used for acquiring an operation signal of auxiliary drive of the cigarette making machine;

the digital output module is used for controlling the temperature reversal of the semiconductor refrigerator 14 and the operation of the axial flow fan.

4. The system of claim 1, further comprising a human-computer interaction module for real-time feedback of the overall oil temperature control condition through a graph and for responding to alarm information in oil temperature control.

5. A method of thermostatically controlling the supply of fuel to a cigarette making machine using the system of any one of claims 1 to 4, comprising the steps of:

s1, starting auxiliary driving of a cigarette making machine, detecting oil temperature of an oil supply area through an oil pool oil temperature sensor, sending an oil temperature detection result to a control module, detecting the height of an oil pool liquid level through an oil pool liquid level sensor, and sending a liquid level detection result to the control module; the control module judges whether the oil temperature of the oil pool detected by the oil pool oil temperature sensor is between a first temperature threshold and a second temperature threshold and whether the liquid level of the oil pool detected by the oil pool liquid level sensor is greater than or equal to a preset liquid level threshold, wherein the first temperature threshold is smaller than the second temperature threshold;

s2, if the condition is not met, the auxiliary drive cannot be started; if so, the control module controls the oil supply motor to supply oil at a preset oil supply starting frequency and controls the oil temperature stirring motor to stir at a preset stirring starting frequency;

s3, detecting oil supply pressure of a pipeline through an inlet oil pressure sensor, sending an oil inlet pressure detection result to a control module, and adjusting the rotating speed of an oil supply motor through a frequency converter by the control module according to the oil inlet pressure detection result to adjust the oil supply pressure;

s4, detecting the oil temperature of an oil supply area through an oil pool oil temperature sensor, sending an oil temperature detection result to the control module, and judging whether the oil temperature of the oil pool detected by the oil pool oil temperature sensor is between a first temperature threshold value and a second temperature threshold value or not by the control module;

step S5, if yes, returning to the step S4, if not, sequentially judging whether the main shaft oil return temperature detected by a main shaft oil return temperature sensor, the spider hand oil return temperature detected by the spider hand oil return temperature sensor, the first brand box oil return temperature detected by a first brand box oil return temperature sensor, the second brand box oil return temperature detected by a second brand box oil return temperature sensor, the spiral return stem detected by the spiral return stem and the chopper disk oil return temperature sensor and the chopper disk oil return temperature are smaller than a first temperature threshold value or larger than a second temperature threshold value or not by a control module, and recording data;

s6, judging whether the oil temperature of the oil pool detected by the oil pool oil temperature sensor is smaller than a first temperature threshold value or larger than a second temperature threshold value by a control module;

and S7, selecting the lowest item or the highest item of the oil return temperature of the main shaft, the spider hand, the first brand box, the second brand box, the spiral return stem and the oil return temperature of the riving knife disc as reference temperatures according to the oil temperature of the oil pool and the first temperature threshold or the second temperature threshold, adjusting the rotating speed of the stirring motor of the oil pool by the control module through a frequency converter, and controlling the semiconductor refrigerator to heat or refrigerate to the regulation temperature by the controller according to the reference temperatures.

6. The method according to claim 5, wherein in step S3, the control module adjusts the rotation speed of the oil supply motor through a frequency converter according to the oil inlet pressure detection result to adjust the oil supply pressure, and specifically comprises:

if the oil inlet pressure is smaller than a first preset pressure threshold value, the frequency of the oil supply motor is increased by a first preset amplitude through the frequency converter, so that the rotating speed of the oil supply motor is increased by the first preset amplitude;

if the oil inlet pressure is greater than or equal to a second preset pressure threshold value, the frequency of the oil supply motor is reduced by a second preset amplitude through the frequency converter, so that the rotating speed of the oil supply motor is reduced by the second preset amplitude;

if the oil inlet pressure is between the second preset pressure threshold and the second preset pressure threshold, maintaining the frequency of the oil supply motor constant;

and after the preset time, returning to the step of judging the oil inlet pressure.

7. The method as claimed in claim 5, wherein in step S5, the control module sequentially determines whether the oil return temperature of the main shaft detected by the main shaft oil return temperature sensor 7, the oil return temperature of the spider hand detected by the spider hand oil return temperature sensor 8, the oil return temperature of the first brand box detected by the first brand box oil return temperature sensor 9, the oil return temperature of the second brand box detected by the second brand box oil return temperature sensor 10, and the oil return temperature of the spiral stem and the chopper disk detected by the spiral stem and chopper disk oil return temperature sensor 11 are less than a first temperature threshold or greater than a second temperature threshold, and records data, specifically comprising:

recording the current oil temperature of the oil pool through a register 0 in the control module, and if the oil temperature of the oil pool is greater than a second temperature threshold value or less than a first temperature threshold value;

and gradually judging whether the oil return temperature of the main shaft, the spider hand, the first brand box, the second brand box, the spiral return stem and the riving knife disc is greater than a second temperature threshold or less than a first temperature threshold, and respectively recording the corresponding oil return temperatures in a register 1, a register 2, a register 3, a register 4 and a register 5 in the control module.

8. The method as claimed in claim 7, wherein when the oil temperature of the oil sump is less than the first temperature threshold, the step S7 of selecting the lowest or highest of the main shaft oil return temperature, the spider hand oil return temperature, the first brand sub-tank oil return temperature, the second brand sub-tank oil return temperature, the spiral return stem and the chopper disk oil return temperature as the reference temperature according to the oil temperature of the oil sump and the first temperature threshold or the second temperature threshold, the control module adjusts the rotation speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor refrigerator to be heated or cooled to the regulation temperature according to the reference temperature, specifically comprising:

s71, if the oil temperature of the oil pool is less than a first temperature threshold value, selecting the lowest item of the main shaft oil return temperature, the spider hand oil return temperature, the first brand box oil return temperature, the second brand box oil return temperature, the spiral return stem and the chopper disk oil return temperature as a reference temperature;

step S72, the control module raises the rotating speed of the oil pool stirring motor through a frequency converter;

s73, the controller controls the semiconductor refrigerator to be heated to a regulation temperature according to the reference temperature;

s74, operating the constant-temperature circulating motor at a constant frequency of 20 Hz;

and step S75, judging whether the oil temperature of the circulating pipeline is between the first temperature threshold value and the second temperature threshold value, if not, making up according to the difference value between the heating temperature and the temperature of the circulating pipeline, and returning to the step S73.

9. The method for controlling the constant temperature of the oil supply of the cigarette making machine according to claim 8, wherein the step S71 of selecting the lowest one of the main shaft oil return temperature, the spider hand oil return temperature, the first brand of box oil return temperature, the second brand of box oil return temperature, the spiral return stem and the chopper wheel oil return temperature as the reference temperature specifically comprises the following steps:

the temperature data in the registers 1 to 5 are compared, the minimum temperature is used as a reference value Tda,

step S73, the controller controls the semiconductor refrigerator to be heated to the regulation temperature according to the reference temperature, and specifically includes:

the temperature heating point to be reached is calculated by the following formula,

wherein Tam represents a normal constant temperature, tda represents a reference temperature, tmax represents a second temperature threshold value, tmin represents a first temperature threshold value, tou represents a return oil temperature of a circulating pipeline, tin represents a temperature of a semiconductor cooler, and To represents a temperature heating point required To be reached;

the semiconductor refrigerator performs heating work, temperature heating regulation and control are performed through the following formula,

wherein kp represents a proportionality coefficient ranging from high temperature to low temperature, ti represents a response time coefficient approaching to the low temperature range, and Td represents a pre-conditioning time coefficient approaching to the low temperature range.

10. The method as claimed in claim 7, wherein when the oil temperature of the oil sump is greater than the second temperature threshold, the step S7 of selecting the lowest or highest of the main shaft oil return temperature, the spider hand oil return temperature, the first brand sub-tank oil return temperature, the second brand sub-tank oil return temperature, the spiral return stem and the chopper disk oil return temperature as the reference temperature according to the oil temperature of the oil sump and the first temperature threshold or the second temperature threshold, the control module adjusts the rotation speed of the oil sump stirring motor through the frequency converter, and the controller controls the semiconductor refrigerator to be heated or cooled to the regulation temperature according to the reference temperature, specifically comprising:

s71-1, if the oil temperature of the oil pool is greater than a second temperature threshold value, selecting the highest item of the main shaft oil return temperature, the spider hand oil return temperature, the first brand box oil return temperature, the second brand box oil return temperature, the spiral return stem and the chopper disk oil return temperature as a reference temperature;

s72-1, judging whether the difference value between the reference temperature and the second temperature threshold value is larger than a preset temperature difference threshold value or not by the control module, and if so, reducing the rotating speed of an oil pool stirring motor by the control module through a frequency converter;

s73-1, controlling the semiconductor refrigerator to refrigerate to a regulation temperature by the controller according to the reference temperature;

s74-1, operating the constant-temperature circulating motor at a constant frequency of 30Hz, increasing the frequency by 1Hz when the oil temperature of the oil pool increases by 1 ℃, and operating at the highest frequency if the oil temperature of the oil pool exceeds a third temperature threshold value;

step 75-1, judging whether the oil temperature of the circulating pipeline is between the first temperature threshold value and the second temperature threshold value, if not, making up according to the difference value between the refrigeration temperature and the temperature of the circulating pipeline, returning to the step S73-1,

when the oil temperature of the oil pool is greater than the second temperature threshold value, the step S71-1 of selecting the highest item of the main shaft oil return temperature, the spider hand oil return temperature, the first brand box oil return temperature, the second brand box oil return temperature, the spiral return stem and the riving knife disc oil return temperature as the reference temperature specifically includes:

the temperature data in the registers 1 to 5 are compared, the maximum temperature data is used as a reference value Tda,

step S73-1, the controller controls the semiconductor refrigerator to refrigerate to the regulation temperature according to the reference temperature, and the method specifically comprises the following steps:

the temperature refrigeration point required to be reached is calculated by the following formula,

wherein Tam represents a normal constant temperature, tda represents a reference temperature, tmax represents a second temperature threshold value, tmin represents a first temperature threshold value, tou represents a return oil temperature of a circulating pipeline, tin represents a temperature of a semiconductor refrigerator, and To represents a temperature refrigerating point required To be reached;

the semiconductor refrigerator carries out refrigeration work, carries out temperature refrigeration regulation and control through the following formula,

wherein kp represents a proportionality coefficient ranging from a high temperature to a low temperature, ti represents a response time coefficient approaching a low temperature range, td represents a pre-regulation time coefficient approaching a low temperature range,

step S74-1, the constant-temperature circulation motor operates at a constant frequency of 30Hz, and the frequency increases by 1Hz for every 1 ℃ increase in the oil temperature of the oil sump, and operates at the highest frequency if the oil temperature of the oil sump exceeds a third temperature threshold, specifically including:

and (3) operating the constant-temperature circulating motor at a reference frequency of 30Hz, taking the difference obtained by subtracting the second temperature threshold from the reference temperature Tda as the number of hertz of the frequency rise of the constant-temperature circulating motor, operating the constant-temperature circulating motor at the highest frequency when the oil temperature of the oil pool is greater than or equal to 65 ℃, and performing temperature acquisition regulation and control again after 5s of time delay when the oil return temperature of the feedback circulating pipeline reaches a constant temperature range.

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