Design method of workshop logistics conveying equipment based on digital twinning

Abstract

The invention relates to the technical field of digital twinning, and particularly discloses a digital twinning-based workshop logistics conveying equipment design method, which comprises the following steps: step 1, carrying out overall design and demand analysis on a paper roll logistics conveying system of a papermaking workshop, understanding the productivity scale and logistics planning of the papermaking workshop, analyzing paper roll characteristics, and carrying out digital twinning on the paper roll logistics conveying system of the papermaking workshop; production fluctuation and environmental influence are comprehensively evaluated, the requirement for the conveying capacity is defined, function design is carried out, and design of efficient transmission and intelligent control and configuration of a protection and recognition positioning device are covered; step 2, performing scheme design and structural design for the chain conveyor, establishing a corresponding three-dimensional geometric model, designing paths of two logistics schemes by importing the established three-dimensional models of the three conveyors into a digital twinning simulation software platform, and performing logistics process simulation and result comparative analysis based on a digital twinning technology so as to obtain a digital twinning simulation result; finally, the arc-shaped turning conveyor which is smoother in logistics process and simpler in structure is selected.

Description

Technical Field

[0001] The present invention relates to the technical field of digital twins, and in particular to a design method for workshop logistics transportation equipment based on digital twins. Background Art

[0002] The invention of paper has played an immeasurable role in human communication of ideas, dissemination of culture, and development of science and technology. The papermaking workshop is the core place for paper production and a vital link in the entire papermaking process chain. With the continuous development of modern technology, papermaking workshops have gradually shifted from traditional manual operations to automated and intelligent production modes.

[0003] Currently in the papermaking workshop, the original paper roll conveyor for finished product logistics is not efficient, the logistics transportation equipment has efficiency bottlenecks, the logistics transportation line is unbalanced with the production line, the beat is not fixed, and the cycle is delayed. It is necessary to redesign the conveyor and simulate and optimize the logistics process. Summary of the invention

[0004] In view of the shortcomings of existing technologies, the present invention provides a design method for workshop logistics transportation equipment based on digital twins, which solves the problems of low efficiency of the original conveyor and imbalance between the logistics transportation line and the production line.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A design method for workshop logistics transportation equipment based on digital twins, comprising the following method steps:

[0006] Step 1: Overall design of paper roll logistics conveying system

[0007] Conduct demand analysis, understand the production capacity and logistics planning of the papermaking workshop, analyze paper roll characteristics, evaluate production fluctuations and environmental impacts, clarify the requirements for conveying capacity, and carry out functional design, which covers the design of efficient transmission and intelligent control, as well as the configuration of protection and identification and positioning devices. Use digital twin-based design simulation and iterative optimization technology to design the chain conveyor scheme and structure, select and design the steering device, complete the structural layout design and simulation analysis of the two in the factory in the virtual space, estimate the scheme cost, and complete the overall scheme design;

[0008] Step 2: Chain conveyor design based on digital twin

[0009] Select the type of chain conveyor, compare the differences between chain and chain plate conveyors, consider paper roll and workshop factors, and conduct detailed design, including structural design, determination of main design parameters, mechanical transmission and electrical transmission system design. Use 3D CAD design software to build a 3D model of the chain conveyor, assemble parts, check interference, and render the assembly model. Through motion process simulation and iterative optimization based on the digital twin platform, the design scheme of the chain conveyor is continuously improved and optimized until a satisfactory design scheme is obtained.

[0010] Step 3: Function selection and design of steering device based on digital twin

[0011] In-depth study of the kinematic and dynamic characteristics of conveyor steering devices, analysis of their application requirements in different scenarios and adaptability to complex environments, evaluation of the performance of shaft-type rotary conveyors and curved turning conveyors, comparison of pros and cons and selection decisions, and parameter, structural and electrical design of steering devices. Use 3D CAD design software to build a 3D model of the steering device, assemble and check interference, render the assembly model, and continuously improve and optimize the design of the conveyor transformation device through motion process simulation and iterative optimization based on the digital twin platform until a satisfactory design is obtained;

[0012] Step 4: Simulation and optimization of paper roll logistics process in papermaking workshop based on digital twin

[0013] Use 3D CAD design software to digitally model the entire papermaking workshop. Then, the digital model of the workshop is lightweight and imported into the digital twin simulation software platform. By formulating two different logistics plans, logistics routes and equipment actions, the logistics process simulation of arc and rotary conveyors is carried out, the workshop layout, equipment operating parameters and logistics routes are optimized, and the simulation results of the two logistics plans are compared to make the best choice.

[0014] Preferably, the chain conveyor is used to connect the flat plate or scale plate bearing member on the traction chain to support and convey materials. The flat plate or scale plate bearing member is an annular bottom plate composed of a plurality of plate bodies fixed to two traction chains, which is wound around the driving sprocket and the tensioning sprocket. Rollers for supporting walking are installed at the joints of the traction chains. The rollers are supported on the rails of the frame and mesh with the wheel points of the sprockets. The sprockets are driven by the transmission mechanism. The materials are added to the bottom plate by the feeding device and move forward along the longitudinal center line of the conveyor together with the bottom plate. The materials are transported to the discharge end and discharged.

[0015] The rotary steering machine is connected to the gear of the reduction motor through a rack by fixing a gear in the middle of the rotating shaft, and the rack drives the rotating shaft to rotate. A pallet is connected to the top of the rotating shaft by a flange, and a conveyor and a conveyor drive system are fixed above the pallet. The conveyor drive system uses chain drive, and a chain connects the motor sprocket and the sprocket on the conveyor rotating shaft.

[0016] Preferably, the shaft-type rotary conveyor is composed of a shaft, a base, a bearing seat, a conveying system, and a driving system, and the driving system drives the shaft to rotate to realize the steering conveying;

[0017] The arc turning conveyor is specially designed for the smooth arc turning requirements in the material transmission process. The structure is similar to that of the chain conveyor, but the belt needs to be replaced with a chain, and the driving system drives the rollers to rotate to achieve transportation.

[0018] Preferably, in step 2, the transmission design of the chain conveyor includes the following steps: selecting the rolling friction coefficient of the chain plate f=0.1,

[0019] The pulling force when transporting the maximum weight of the cargo is:

[0020] F = fmg = 0.1 × 800 × 10 = 800N

[0021] Among them, m0 is the maximum conveying weight of the conveyor, and g is the acceleration of gravity;

[0022] The conveyor load is:

[0023] Q=(m0+m1)K=(800+150)×3=2850kg

[0024] Among them, m1 is the total weight of the chain plate, and K is the safety factor;

[0025] The motor drive power is:

[0026]

[0027] Among them, v is the conveyor speed, K is the safety factor, and η is the conveyor efficiency;

[0028] After taking into account the power required by the chain plate and transmission accessories, a motor with a rated power of 2 kW is sufficient to meet the requirements. The chain length x = 418, the chain length L = 10.62m, then the chain pitch is set to p = 25.4mm, and the number of teeth Z = 23; the number of teeth of the driving wheel is selected: 17 teeth are generally selected for short-distance transmission, 19 teeth or more are selected for medium and high-speed stable operation, and 23 teeth or more are required for large load ratios and forward and reverse rotation. Considering that the chain plate conveyor needs forward and reverse rotation, the number of teeth is selected as 23 here;

[0029] Initially set the center distance A0 = 197, chain number: 16A, its pitch circle diameter D = 0.187m, so the motor output speed is:

[0030]

[0031] D is the pitch circle diameter and the torque is:

[0032]

[0033] Z is the number of teeth, p is the chain pitch, and n is the speed, so the design speed of the chain is:

[0034]

[0035] Chain effective circumferential force:

[0036]

[0037] Preferably, in the step 3, different electrical designs are used for two different conveyors, namely, the shaft-type rotary conveyor and the arc-shaped curved conveyor, and different data can be obtained by selecting different torques and speeds;

[0038] The arc-shaped turning conveyor: because the pitch circle diameter of the chain plate conveyor is 0.187m, the chain plate of the chain plate conveyor is a strip plate, which is higher than the chain plate of the arc-shaped turning conveyor, so the pitch circle diameter of the turning conveyor is set to 0.2m, the friction force between the chain plate and the conveyed object is set to f1=0.15, and the conveying speed is also set to: v=0.5m / s;

[0039] The expression of torque is:

[0040]

[0041] The expression for the rotation speed is:

[0042]

[0043] The shaft-type rotary conveyor: The shaft-type rotary conveyor needs to design and select the drive motor of the conveyor and the drive motor of the shaft. First, calculate the drive motor of the conveyor. The conveying speed is also set to: v = 0.5m / s, and the roller diameter is set to 0.07m. Because the roller and the motor sprocket are linked by chain drive, the transmission ratio is 1, and the expression of the motor speed is obtained as follows:

[0044]

[0045] Torque is the product of force and lever arm, where the lever arm is the radius of the drum. The expression for torque is:

[0046]

[0047] Preferably, in step 4, the model is lightweight, including the following specific steps:

[0048] Convert the 3D model of the assembly built in the 3D CAD design software into a lightweight JT format;

[0049] After completing the overall design and modeling of the logistics equipment, the built 3D model was imported into the simulation software to build a digital model of the logistics conveyor line of the papermaking workshop;

[0050] Before modeling the conveyor line, the previously established 3D model of the conveyor must be converted into the JT format. Using the Crossmanager format conversion tool, first save the model file in the 3D CAD design software as an STL format without saving the parts separately, and then drag the STL model file into the Crossmanager conversion bar to complete the conversion of the model file from STL format to JT format.

[0051] Preferably, in the step 4, the workshop model is constructed by using 3D modeling software to create a digital model of the workshop, and then the 3D models of the components of the rotary conveyor and the curved turning conveyor created previously are placed into the digital model of the workshop, and integrated with the digital model of the papermaking workshop;

[0052] Then, the components are virtually assembled to simulate the motion relationship in actual work. Interference checking and motion simulation tools are used to check whether there is interference between moving parts and optimize it.

[0053] The assembled model is realistically rendered and integrated with the digital model of the papermaking workshop according to the actual process design. The motion process of related equipment is simulated to fully replicate the physical state, and it is rendered and post-processed. The working principle and action process of the steering device are visually displayed through the monitoring screen.

[0054] The present invention provides a design method for workshop logistics transportation equipment based on digital twins. It has the following beneficial effects:

[0055] 1. The present invention carries out scheme design and structural design for chain conveyors, and carries out detailed structural design for chain plate conveyors, rotary conveyors and curved turning conveyors respectively, and establishes corresponding three-dimensional geometric models; the three-dimensional models of the three conveyors are imported into the digital twin simulation software platform, the paths of two logistics schemes are designed, and the logistics process simulation and result comparison analysis are carried out based on the digital twin technology. Finally, a curved turning conveyor with a smoother logistics process and a simpler structure is selected.

[0056] 2. The present invention redesigns and models the logistics conveyor lines and equipment according to different needs, and constructs a digital model of the logistics conveyor lines and equipment based on the data used in the above modeling. The digital twin technology is adopted to simulate the motion process based on the digital model of the logistics conveyor lines and their equipment. Through multiple iterations, the logistics rhythm is optimized, the bottlenecks are identified and optimized, and the equipment structure and operating parameters are optimized. The logistics conveyor lines and equipment are continuously iteratively optimized and updated, thereby optimizing the relationship between production and logistics, improving logistics efficiency, eliminating logistics equipment bottlenecks, and achieving a balance between production lines and logistics. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a flow chart of a design method of workshop logistics transportation equipment based on digital twin of the present invention; DETAILED DESCRIPTION

[0058] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] Example:

[0060] Please see attached Figure 1 , an embodiment of the present invention provides a design method for workshop logistics transportation equipment based on digital twin, comprising the following method steps:

[0061] Step 1: Overall design of paper roll logistics conveying system

[0062] Conduct demand analysis, understand the production capacity and logistics planning of the papermaking workshop, analyze paper roll characteristics, evaluate production fluctuations and environmental impacts, clarify the requirements for conveying capacity, and carry out functional design, which covers the design of efficient transmission and intelligent control, as well as the configuration of protection and identification and positioning devices. Use digital twin-based design simulation and iterative optimization technology to design the chain conveyor scheme and structure, select and design the steering device, complete the structural layout design and simulation analysis of the two in the factory in the virtual space, estimate the scheme cost, and complete the overall scheme design;

[0063] Step 2: Chain conveyor design based on digital twin

[0064] Select the type of chain conveyor, compare the differences between chain and chain plate conveyors, consider paper roll and workshop factors, and conduct detailed design, including structural design, determination of main design parameters, mechanical transmission and electrical transmission system design. Use 3D CAD design software to build a 3D model of the chain conveyor, assemble parts, check interference, and render the assembly model. Through motion process simulation and iterative optimization based on the digital twin platform, the design scheme of the chain conveyor is continuously improved and optimized until a satisfactory design scheme is obtained.

[0065] Step 3: Function selection and design of steering device based on digital twin

[0066] In-depth study of the kinematic and dynamic characteristics of conveyor steering devices, analysis of their application requirements in different scenarios and adaptability to complex environments, evaluation of the performance of shaft-type rotary conveyors and curved turning conveyors, comparison of pros and cons and selection decisions, and parameter, structural and electrical design of steering devices. Use 3D CAD design software to build a 3D model of the steering device, assemble and check interference, render the assembly model, and continuously improve and optimize the design of the conveyor transformation device through motion process simulation and iterative optimization based on the digital twin platform until a satisfactory design is obtained;

[0067] Step 4: Simulation and optimization of paper roll logistics process in papermaking workshop based on digital twin

[0068] Use 3D CAD design software to digitally model the entire papermaking workshop. Then, the digital model of the workshop is lightweight and imported into the digital twin simulation software platform. By formulating two different logistics plans, logistics routes and equipment actions, the logistics process simulation of arc and rotary conveyors is carried out, the workshop layout, equipment operating parameters and logistics routes are optimized, and the simulation results of the two logistics plans are compared to make the best choice.

[0069] 2. A design method for workshop logistics transportation equipment based on digital twin according to claim 1, characterized in that: the chain plate conveyor is used to connect the flat plate or scale plate bearing member on the traction chain to support and transport materials, the flat plate or scale plate bearing member is an annular bottom plate composed of a plurality of plate bodies fixed to two traction chains, wound around the driving sprocket and the tensioning sprocket, and rollers supporting walking are installed at the joints of the traction chain. The rollers are supported on the track of the frame and mesh with the wheel points of the sprocket. The sprocket is driven by a transmission mechanism, and the material is added to the bottom plate by the feeding device, and moves forward along the longitudinal center line of the conveyor together with the bottom plate. The material is transported to the discharge end and discharged;

[0070] The rotary steering machine is connected to the gear of the reduction motor through a rack by fixing a gear in the middle of the rotating shaft, and the rack drives the rotating shaft to rotate. A pallet is connected to the top of the rotating shaft by a flange, and a conveyor and a conveyor drive system are fixed above the pallet. The conveyor drive system uses chain drive, and a chain connects the motor sprocket and the sprocket on the conveyor rotating shaft.

[0071] 3. According to a design method of workshop logistics transportation equipment based on digital twins as described in claim 1, it is characterized in that: the arc turning conveyor is specially designed for the smooth arc turning requirements during material transmission. The structure is similar to the chain conveyor, but the belt needs to be replaced with a chain, and the roller is driven by the drive system to rotate to achieve transportation.

[0072] 4. According to a design method of workshop logistics conveying equipment based on digital twinning according to claim 1, it is characterized in that: in the step 2, the transmission design of the chain conveyor includes the following steps, selecting the rolling friction coefficient of the chain plate f=0.1, then the pulling force when conveying the maximum weight of the goods is:

[0073] F = fmg = 0.1 × 800 × 10 = 800N

[0074] Among them, m0 is the maximum conveying weight of the conveyor, and g is the acceleration of gravity;

[0075] The conveyor load is:

[0076] Q=(m0+m1)K=(800+150)×3=2850kg

[0077] Among them, m1 is the total weight of the chain plate, and K is the safety factor;

[0078] The motor drive power is:

[0079]

[0080] v is the conveyor speed, K is the safety factor, and η is the conveyor efficiency;

[0081] After taking into account the power required by the chain plate and transmission accessories, a motor with a rated power of 2 kW is sufficient to meet the requirements. The chain length x = 418, the chain length L = 10.62m, then the chain pitch is set to p = 25.4mm, and the number of teeth Z = 23; the number of teeth of the driving wheel is selected: generally 17 teeth are selected for short-distance transmission, 19 teeth or more are selected for medium and high-speed stable operation, and 23 teeth or more are selected for large load ratios and forward and reverse rotation. Considering that the chain plate conveyor needs forward and reverse rotation, the number of teeth is selected as 23 here;

[0082] Initially set the center distance A0 = 197, chain number: 16A, its pitch circle diameter D = 0.187m, so the motor output speed is:

[0083]

[0084] Where D is the pitch circle diameter

[0085] The torque is:

[0086]

[0087] Z is the number of teeth, p is the chain pitch, and n is the speed, so the design speed of the chain is:

[0088]

[0089] Chain effective circumferential force:

[0090]

[0091] 5. The design method of workshop logistics conveying equipment based on digital twin according to claim 1 is characterized in that: in the step 3, different electrical designs are adopted for two different conveyors, namely, the shaft-type rotary conveyor and the arc-shaped curve conveyor, and different data can be obtained by selecting different torques and speeds;

[0092] The arc-shaped turning conveyor: because the pitch circle diameter of the chain plate conveyor is 0.187m, the chain plate of the chain plate conveyor is a strip plate, which is higher than the chain plate of the arc-shaped turning conveyor, so the pitch circle diameter of the turning conveyor is set to 0.2m, the friction force between the chain plate and the conveyed object is set to f1=0.15, and the conveying speed is also set to: v=0.5m / s;

[0093] The expression of torque is:

[0094]

[0095] The expression of speed is:

[0096]

[0097] The shaft-type rotary conveyor: The shaft-type rotary conveyor needs to calculate and select the conveyor drive motor and the shaft drive motor. First calculate the conveyor drive motor. The conveying speed is also set to: v = 0.5m / s, and the roller diameter is set to 0.07m. Because the roller and the motor sprocket are linked by a chain drive, the transmission ratio is 1, and the formula for the motor speed is:

[0098]

[0099] Torque is the product of force and lever arm, where the lever arm is the radius of the drum. The expression for calculating torque is:

[0100]

[0101] 6. According to a method for designing workshop logistics transportation equipment based on digital twins according to claim 1, it is characterized in that: in the step 4, the model is lightweight, including the following specific steps:

[0102] Convert the 3D model of the assembly built in the 3D CAD design software into a lightweight JT format;

[0103] After completing the overall design and modeling of the logistics equipment, the built 3D model was imported into the simulation software to build a digital model of the logistics conveyor line of the papermaking workshop;

[0104] Before modeling the conveyor line, the previously established 3D model of the conveyor must be converted into the JT format. Using the Crossmanager format conversion tool, first save the model file in the 3D CAD design software as an STL format without saving the parts separately, and then drag the STL model file into the Crossmanager conversion bar to complete the conversion of the model file from STL format to JT format.

[0105] 7. According to the design method of workshop logistics transportation equipment based on digital twins as described in claim 1, it is characterized in that: in the step 4, the workshop model is constructed by using three-dimensional modeling software to create a digital model of the workshop, and then the three-dimensional models of the components of the rotary conveyor and the curved turning conveyor created previously are placed in the digital model of the workshop, and integrated with the digital model of the papermaking workshop;

[0106] Then, the components are virtually assembled to simulate the motion relationship in actual work. Interference checking and motion simulation tools are used to check whether there is interference between moving parts and optimize it.

[0107] The assembled model is realistically rendered and integrated with the digital model of the papermaking workshop according to the actual process design. The motion process of related equipment is simulated to fully replicate the physical state, and it is rendered and post-processed. The working principle and action process of the steering device are visually displayed through the monitoring screen.

[0108] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A design method for workshop logistics transportation equipment based on digital twin, characterized in that: The method comprises the following steps: Step 1: Overall design of paper roll logistics conveying system Conduct demand analysis, understand the production capacity and logistics planning of the papermaking workshop, analyze paper roll characteristics, evaluate production fluctuations and environmental impacts, clarify the requirements for conveying capacity, and carry out functional design, which covers the design of efficient transmission and intelligent control, as well as the configuration of protection and identification and positioning devices. Use digital twin-based design simulation and iterative optimization technology to design the chain conveyor scheme and structure, select and design the steering device, complete the structural layout design and simulation analysis of the two in the factory in the virtual space, estimate the scheme cost, and complete the overall scheme design; Step 2: Chain conveyor design based on digital twin Select the type of chain conveyor, compare the differences between chain and chain plate conveyors, consider paper roll and workshop factors, and conduct detailed design, including structural design, determination of main design parameters, mechanical transmission and electrical transmission system design. Use 3D CAD design software to build a 3D model of the chain conveyor, assemble parts, check interference, and render the assembly model. Through motion process simulation and iterative optimization based on the digital twin platform, the design scheme of the chain conveyor is continuously improved and optimized. Step 3: Function selection and design of steering device based on digital twin In-depth study of the kinematic and dynamic characteristics of conveyor steering devices, analysis of their application requirements in different scenarios and adaptability to complex environments, evaluation of the performance of shaft-type rotary conveyors and curved turn conveyors, comparison of pros and cons and selection decisions, and parameter, structural and electrical design of steering devices. Use 3D CAD design software to build a 3D model of the steering device, assemble and check interference, render the assembly model, and continuously improve and optimize the design of conveyor transformation devices through motion process simulation and iterative optimization based on the digital twin platform; Step 4: Simulation and optimization of paper roll logistics process in papermaking workshop based on digital twin Use 3D CAD design software to digitally model the entire papermaking workshop. Then, the digital model of the workshop is lightweight and imported into the digital twin simulation software platform. By formulating two different logistics plans, logistics routes and equipment actions, the logistics process simulation of arc and rotary conveyors is carried out, the workshop layout, equipment operating parameters and logistics routes are optimized, and the simulation results of the two logistics plans are compared to make the best choice.

2. The design method of workshop logistics transportation equipment based on digital twin according to claim 1 is characterized in that: The chain conveyor is used to connect the flat plate or scale plate bearing member on the traction chain to support and convey materials. The flat plate or scale plate bearing member is an annular bottom plate composed of a plurality of plate bodies fixed to two traction chains, which is wound around the driving sprocket and the tensioning sprocket. Rollers supporting walking are installed at the joints of the traction chain. The rollers are supported on the rails of the frame and mesh with the wheel points of the sprocket. The sprocket is driven by the transmission mechanism. The material is added to the bottom plate by the feeding device and moves forward along the longitudinal center line of the conveyor together with the bottom plate. The material is transported to the discharge end and discharged; The rotary steering machine is connected to the gear of the reduction motor through a rack by fixing a gear in the middle of the rotating shaft, and the rack drives the rotating shaft to rotate. A pallet is connected to the top of the rotating shaft by a flange, and a conveyor and a conveyor drive system are fixed above the pallet. The conveyor drive system uses chain drive, and a chain connects the motor sprocket and the sprocket on the conveyor rotating shaft.

3. The design method of workshop logistics transportation equipment based on digital twin according to claim 1 is characterized in that: The arc turning conveyor is specially designed for the smooth arc turning requirements in the material transmission process. The structure is similar to that of the chain conveyor, but the belt needs to be replaced with a chain, and the driving system drives the rollers to rotate to achieve transportation.

4. The design method of workshop logistics transportation equipment based on digital twin according to claim 1 is characterized in that: In step 2, the transmission design of the chain conveyor is: The following steps are included. The rolling friction coefficient of the chain plate is selected to be f = 0.

1. Then the pulling force when conveying the maximum weight of the goods is: F = fmg = 0.1 × 800 × 10 = 800N Among them, m0 is the maximum conveying weight of the conveyor, and g is the acceleration of gravity; The conveyor load is: Q=(m0+m1)K=(800+150)×3=2850kg Among them, m1 is the total weight of the chain plate, and K is the safety factor; The motor drive power is: v is the conveyor speed, K is the safety factor, and η is the conveyor efficiency; After taking into account the power required by the chain plate and transmission accessories, a motor with a rated power of 2 kW is sufficient to meet the requirements. The chain length x = 418, the chain length L = 10.62m, then the chain pitch is set to p = 25.4mm, and the number of teeth Z = 23; the number of teeth of the driving wheel is selected: generally 17 teeth are selected for short-distance transmission, 19 teeth or more are selected for medium and high-speed stable operation, and 23 teeth or more are selected for large load ratios and forward and reverse rotation. Considering that the chain plate conveyor needs forward and reverse rotation, the number of teeth is selected as 23 here; Initially set the center distance A0 = 197, chain number: 16A, its pitch circle diameter D = 0.187m, so the motor output speed is: Where D is the pitch circle diameter The torque is: Z is the number of teeth, p is the chain pitch, and n is the speed, so the design speed of the chain is: Chain effective circumferential force:

5. The design method of workshop logistics transportation equipment based on digital twin according to claim 1 is characterized in that: In the step 3, different electrical designs are used for two different conveyors, namely, the shaft-type rotary conveyor and the arc-shaped curved conveyor. Different data can be obtained by selecting different torques and speeds. The arc-shaped turning conveyor: because the pitch circle diameter of the chain plate conveyor is 0.187m, the chain plate of the chain plate conveyor is a strip plate, which is higher than the chain plate of the arc-shaped turning conveyor, so the pitch circle diameter of the turning conveyor is set to 0.2m, the friction force between the chain plate and the conveyed object is set to f1=0.15, and the conveying speed is also set to: v=0.5m / s; The expression of torque is: The expression of speed is: The shaft-type rotary conveyor: The shaft-type rotary conveyor needs to calculate and select the conveyor drive motor and the shaft drive motor. First calculate the conveyor drive motor. The conveying speed is also set to: v = 0.5m / s, and the roller diameter is set to 0.07m. Because the roller and the motor sprocket are linked by a chain drive, the transmission ratio is 1, and the formula for the motor speed is: Torque is the product of force and lever arm, where the lever arm is the radius of the drum. The expression for calculating torque is:

6. The design method of workshop logistics transportation equipment based on digital twin according to claim 1 is characterized by: In step 4, the model is lightweight, including the following specific steps: Convert the 3D model of the assembly built in the 3D CAD design software into a lightweight JT format; After completing the overall design and modeling of the logistics equipment, the built 3D model was imported into the simulation software to build a digital model of the logistics conveyor line of the papermaking workshop; Before modeling the conveyor line, the previously established 3D model of the conveyor must be converted into the JT format. Using the Crossmanager format conversion tool, first save the model file in the 3D CAD design software as an STL format without saving the parts separately, and then drag the STL model file into the Crossmanager conversion bar to complete the conversion of the model file from STL format to JT format.

7. The method for designing workshop logistics transportation equipment based on digital twin according to claim 1 is characterized in that: In the fourth step, the workshop model is constructed by using 3D modeling software to create a digital model of the workshop, and then the 3D models of the components of the rotary conveyor and the curved turning conveyor created previously are placed in the digital model of the workshop, and integrated with the digital model of the papermaking workshop; Then, the components are virtually assembled to simulate the motion relationship in actual work. Interference checking and motion simulation tools are used to check whether there is interference between moving parts and optimize it. The assembled model is realistically rendered and integrated with the digital model of the papermaking workshop according to the actual process design. The motion process of related equipment is simulated to fully replicate the physical state, and it is rendered and post-processed. The working principle and action process of the steering device are visually displayed through the monitoring screen.

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