I. Introduction of Linear Motor Industry The tamping machine is composed of linear motors. Before introducing the tamping machine, it first introduces the advantages of the linear motor, the application of the linear motor, the advantages of the linear motor, and the combination of transmission elements and actuators of the linear displacement mechanism. . According to the energy conversion theorem, linear motors of the feed mechanism can be classified into synchronous motors and asynchronous motors. The linear motor has the advantages of compact structure, low power loss, high speed of rapid movement, high acceleration, low motion noise, etc. The biggest difference between the linear motor drive mode and the rotary motor drive mode is that it eliminates all the mechanical intermediate between the motor and the table. The transmission link realizes “zero transmission†and avoids the disadvantages of backlash, inertia, friction, and lack of rigidity in the screw drive.
1. Applications in industry and automation As linear motors have their own unique advantages, they are widely used in the mechanical and electrical integration of mechanical equipment and machine tools, such as linear motor-driven punching machines, electromagnetic hammers, screw presses, electromagnetic Foil machines, die casting machines and profile rolling tractors. The power source used for reciprocation in mechanical processing machines—linear electromagnetic drive devices—is used in turning, planing, grinding, inserting, sawing, and pulling machines to replace traditional mechanical transmissions. Linear motor driven XY tables are also used in laser machinery and semiconductor manufacturing equipment. And for the combination of machine tool automation production machine tool linear motor drive transmission line, for the molten metal mixer float glass production line. Linear motor driven vacuum circuit breakers used in power grids for beneficiation of linear motor ferromagnetic separators. Used in the metallurgical industry electromagnetic pump, liquid metal mixer. Linear motor-driven electric shuttles, cutting devices and various automated instruments and electric actuators used in the textile industry.
2. Applications in the transportation industry Linear motor technology is an important application in magnetic levitation trains. It is a major breakthrough in the development of transportation technologies. In addition to this, there are linear electromagnetic motor driven electromagnetic propellers. Motor-driven subways, high-speed electric vehicles driven by linear motors, etc.
3. Applications in material handling and handling Linear motors have unique advantages in the transport and handling of various materials, such as linear motor elevators and elevators in vertical transport, and linear motor-driven postal packages in flat transport. Sorting conveyor line, baggage sorting conveyor line, steel production line, electrical, electronic, mechanical processing production line, food processing line, pharmaceutical production line and other industrial processing lines, assembly lines, testing lines, shopping malls, hospitals and other occasions of the material transport And the transportation of three-dimensional warehouses, the dispatch of a three-dimensional garage.
4. Application in civil and construction industry Linear motors are also widely used in civil and construction industries, such as linear motor-driven doors and door locks, windows and curtains, beds, tables, chairs, etc., which are driven by linear motors. Washing machines, dryers, drying racks, power tools, moving hands, tightening devices, etc.
5. Linear motor applications in the field of computers and office equipment In the computer drive equipment, input and output devices, such as digital scanners, printers, have adopted a linear motor drive. Linear motors such as graphics and pen recorders are also used in office equipment.
6. In the military, medical and other fields, linear motors have been applied to electromagnetic guns, submarines, and military simulation facilities. Some linear motors have also been used on satellites and spacecraft. In medical instruments, linear motors have been used in artificial hearts, blind haptic simulators, and linear motors in electrotherapy and magnetotherapy massage. The toy industry also makes extensive use of linear motors.
Second, linear motor drive tamping machine and traditional tamping machine advantages 1. The traditional tamping machine working principle Through the motor reducer, the use of speed reducer output shaft rotation, through the coupling, transmission mechanism, camshaft system, cam edge circular motion The ramming hammer is thrown 400mm. The hammer rod accurately enters the coal trough through the upper and lower racks and guiding devices. The continuous oscillating motion of the camshaft is used to throw the tamping hammer up and down to achieve continuous tamping. 2. Problems with traditional tamping machines 1) Problems with ramming hammers Due to the large clearance between the hammer rod and the guide device, During the process, under the influence of external forces, the ramming hammer cannot fall into the coal trough vertically, causing a rammer.
2) gear teeth gear reducer problems due to inaccurate guidance, tamping hammer in the tamping process often swings, forcing the tamping hammer to do irregular movements, resulting in the tamping speed reducer in the tamping process by uneven external force collision , After a long period of irregular movements, gear reducer gear teeth.
3) Rack cracking problems Due to the softness of the steel structure of the original frame and the weak part of the force, together with the weight of the tamping hammer, the weight is about 400Kg, which is affected by the shock of the irregular movement and tamping process. Over time, the steel frame of the tamping machine is fatigued and the frame is cracked.
4) Damage to Elastic Components Due to inaccurate guiding of the original guide mechanism, tamping of the hammer bar during the tamping process, the elastic member is hit by an external force, causing frequent damage.
5) It is inconvenient to maintain the consumable parts of the equipment. The friction plates of the tamping rods should be replaced regularly. For example, in the production, the friction plates fall off and get squeezed in the eccentric wheel, causing the ram bar to fail to lift the hammer. This kind of problem is handled as follows: release Fixed wire, remove the friction plate, put down the tamping rod, replace the new friction plate and tamping rod, long maintenance cycle, high cost, affect the production.
Third, the use of GTAKE variable frequency linear motor program 1, linear motor tamping machine composed of single hammer tamping machine, there is a GK600-4T132G/160L, four linear motors, rated power of 17.5KW, rated current 35A, rated thrust 2500N, grade Number six, power factor 0.54, a 480Kg hammer, gantry, guide wheel and auxiliary machinery, electronic control system consists of Siemens S7-300PLC and Wincc.
2. Inverter drives linear motor and four linear motors are connected in parallel. The inverter supplies power to four motors at the same time and adopts V/F control.
Control parameter A0-09=0V/F control B0-01=2 Frequency main reference method Analog quantity AI1
B0-08=15.35 Maximum frequency B0-09=15.35 Frequency upper line B1-00=1 Terminal control B1-13=1 Free stop B2-01=0.05 Speed ​​up time C0-01=3 Terminal X1 function forward rotation C1-00= 3 Inverter operation C1-02=14 Fault output D0-00=0 Normal motor D0-01=70 Rated power D0-02=380 Rated voltage D0-03=140 Rated current D0-04=13.55 Rated frequency D0-05 =6 Series D0-06=306 Rated Speed ​​IV. Benefits of the Control System of Jitaike Control System 1. The working efficiency of the linear motor driven by the inverter is improved, and the operating height is all at 400mm. The number of traditional tamping machines is about 60 times. , The frequency converter drives the linear motor to run about 67 times.
2. Because the clearance between the hammer rod and the motor coil is about 2mm, the clearance is small, and there is no phenomenon of the traditional tamping machine hammer.
3. The linear motor operates in a direct drive mode, there is no speed reducer, there is no wear and repair of the reducer, and the point of failure is reduced.
4. The old tamping machine is of friction type. The friction linings should be frequently replaced and maintained. Maintenance cost, maintenance time, and high failure rate affect the production. The frequency conversion linear motor type tamping machine does not have friction linings, saving maintenance cost and maintenance time.
5. The equipment stability is improved and the production efficiency is increased. Different from the principle, there is no mechanical device such as a reducer or a friction plate to reduce the weight of the equipment. The service life of the gantry under the same weight increases.
V. Concluding remarks The above solutions have been applied in many occasions and have been approved by the manufacturers. They have been used for a long period of time. They have been running smoothly and have excellent control results. They have been well received by users.
About Jitai Koji Tyco Electric Co., Ltd. is based on the power electronics technology and motor control technology with independent intellectual property rights, and is committed to building a world-class technology platform to serve international and domestic companies in the industry with first-class products and system solutions. VIP. Gytecho has been continuously innovating around the needs of its customers, and has opened up cooperation with partners to provide customers with a full range of supporting drive solutions to create maximum value. At present, its products and solutions are widely used in various medium and high-end applications in the drive industry.
The company always adheres to the concept of "Strudent-based". It upholds the spirit of independent innovation and sincere solidarity in its business operations. It adopts the concept of modern enterprise management and utilizes modern management tools to make its business processes standardized and efficient.
1. Applications in industry and automation As linear motors have their own unique advantages, they are widely used in the mechanical and electrical integration of mechanical equipment and machine tools, such as linear motor-driven punching machines, electromagnetic hammers, screw presses, electromagnetic Foil machines, die casting machines and profile rolling tractors. The power source used for reciprocation in mechanical processing machines—linear electromagnetic drive devices—is used in turning, planing, grinding, inserting, sawing, and pulling machines to replace traditional mechanical transmissions. Linear motor driven XY tables are also used in laser machinery and semiconductor manufacturing equipment. And for the combination of machine tool automation production machine tool linear motor drive transmission line, for the molten metal mixer float glass production line. Linear motor driven vacuum circuit breakers used in power grids for beneficiation of linear motor ferromagnetic separators. Used in the metallurgical industry electromagnetic pump, liquid metal mixer. Linear motor-driven electric shuttles, cutting devices and various automated instruments and electric actuators used in the textile industry.
2. Applications in the transportation industry Linear motor technology is an important application in magnetic levitation trains. It is a major breakthrough in the development of transportation technologies. In addition to this, there are linear electromagnetic motor driven electromagnetic propellers. Motor-driven subways, high-speed electric vehicles driven by linear motors, etc.
3. Applications in material handling and handling Linear motors have unique advantages in the transport and handling of various materials, such as linear motor elevators and elevators in vertical transport, and linear motor-driven postal packages in flat transport. Sorting conveyor line, baggage sorting conveyor line, steel production line, electrical, electronic, mechanical processing production line, food processing line, pharmaceutical production line and other industrial processing lines, assembly lines, testing lines, shopping malls, hospitals and other occasions of the material transport And the transportation of three-dimensional warehouses, the dispatch of a three-dimensional garage.
4. Application in civil and construction industry Linear motors are also widely used in civil and construction industries, such as linear motor-driven doors and door locks, windows and curtains, beds, tables, chairs, etc., which are driven by linear motors. Washing machines, dryers, drying racks, power tools, moving hands, tightening devices, etc.
5. Linear motor applications in the field of computers and office equipment In the computer drive equipment, input and output devices, such as digital scanners, printers, have adopted a linear motor drive. Linear motors such as graphics and pen recorders are also used in office equipment.
6. In the military, medical and other fields, linear motors have been applied to electromagnetic guns, submarines, and military simulation facilities. Some linear motors have also been used on satellites and spacecraft. In medical instruments, linear motors have been used in artificial hearts, blind haptic simulators, and linear motors in electrotherapy and magnetotherapy massage. The toy industry also makes extensive use of linear motors.
Second, linear motor drive tamping machine and traditional tamping machine advantages 1. The traditional tamping machine working principle Through the motor reducer, the use of speed reducer output shaft rotation, through the coupling, transmission mechanism, camshaft system, cam edge circular motion The ramming hammer is thrown 400mm. The hammer rod accurately enters the coal trough through the upper and lower racks and guiding devices. The continuous oscillating motion of the camshaft is used to throw the tamping hammer up and down to achieve continuous tamping. 2. Problems with traditional tamping machines 1) Problems with ramming hammers Due to the large clearance between the hammer rod and the guide device, During the process, under the influence of external forces, the ramming hammer cannot fall into the coal trough vertically, causing a rammer.
2) gear teeth gear reducer problems due to inaccurate guidance, tamping hammer in the tamping process often swings, forcing the tamping hammer to do irregular movements, resulting in the tamping speed reducer in the tamping process by uneven external force collision , After a long period of irregular movements, gear reducer gear teeth.
3) Rack cracking problems Due to the softness of the steel structure of the original frame and the weak part of the force, together with the weight of the tamping hammer, the weight is about 400Kg, which is affected by the shock of the irregular movement and tamping process. Over time, the steel frame of the tamping machine is fatigued and the frame is cracked.
4) Damage to Elastic Components Due to inaccurate guiding of the original guide mechanism, tamping of the hammer bar during the tamping process, the elastic member is hit by an external force, causing frequent damage.
5) It is inconvenient to maintain the consumable parts of the equipment. The friction plates of the tamping rods should be replaced regularly. For example, in the production, the friction plates fall off and get squeezed in the eccentric wheel, causing the ram bar to fail to lift the hammer. This kind of problem is handled as follows: release Fixed wire, remove the friction plate, put down the tamping rod, replace the new friction plate and tamping rod, long maintenance cycle, high cost, affect the production.
Third, the use of GTAKE variable frequency linear motor program 1, linear motor tamping machine composed of single hammer tamping machine, there is a GK600-4T132G/160L, four linear motors, rated power of 17.5KW, rated current 35A, rated thrust 2500N, grade Number six, power factor 0.54, a 480Kg hammer, gantry, guide wheel and auxiliary machinery, electronic control system consists of Siemens S7-300PLC and Wincc.
2. Inverter drives linear motor and four linear motors are connected in parallel. The inverter supplies power to four motors at the same time and adopts V/F control.
Control parameter A0-09=0V/F control B0-01=2 Frequency main reference method Analog quantity AI1
B0-08=15.35 Maximum frequency B0-09=15.35 Frequency upper line B1-00=1 Terminal control B1-13=1 Free stop B2-01=0.05 Speed ​​up time C0-01=3 Terminal X1 function forward rotation C1-00= 3 Inverter operation C1-02=14 Fault output D0-00=0 Normal motor D0-01=70 Rated power D0-02=380 Rated voltage D0-03=140 Rated current D0-04=13.55 Rated frequency D0-05 =6 Series D0-06=306 Rated Speed ​​IV. Benefits of the Control System of Jitaike Control System 1. The working efficiency of the linear motor driven by the inverter is improved, and the operating height is all at 400mm. The number of traditional tamping machines is about 60 times. , The frequency converter drives the linear motor to run about 67 times.
2. Because the clearance between the hammer rod and the motor coil is about 2mm, the clearance is small, and there is no phenomenon of the traditional tamping machine hammer.
3. The linear motor operates in a direct drive mode, there is no speed reducer, there is no wear and repair of the reducer, and the point of failure is reduced.
4. The old tamping machine is of friction type. The friction linings should be frequently replaced and maintained. Maintenance cost, maintenance time, and high failure rate affect the production. The frequency conversion linear motor type tamping machine does not have friction linings, saving maintenance cost and maintenance time.
5. The equipment stability is improved and the production efficiency is increased. Different from the principle, there is no mechanical device such as a reducer or a friction plate to reduce the weight of the equipment. The service life of the gantry under the same weight increases.
V. Concluding remarks The above solutions have been applied in many occasions and have been approved by the manufacturers. They have been used for a long period of time. They have been running smoothly and have excellent control results. They have been well received by users.
About Jitai Koji Tyco Electric Co., Ltd. is based on the power electronics technology and motor control technology with independent intellectual property rights, and is committed to building a world-class technology platform to serve international and domestic companies in the industry with first-class products and system solutions. VIP. Gytecho has been continuously innovating around the needs of its customers, and has opened up cooperation with partners to provide customers with a full range of supporting drive solutions to create maximum value. At present, its products and solutions are widely used in various medium and high-end applications in the drive industry.
The company always adheres to the concept of "Strudent-based". It upholds the spirit of independent innovation and sincere solidarity in its business operations. It adopts the concept of modern enterprise management and utilizes modern management tools to make its business processes standardized and efficient.
the self-rescuer [1] is a kind of respiratory protective device that is carried by people entering the well to prevent harmful gas poisoning or hypoxia asphyxiation when fire, gas, coal dust explosion, coal and gas outburst occur underground.A self - rescuer is a small, lightweight, portable device that protects the respiratory organs of individuals.The main purpose of the rescue is that when an accident happens in a coal mine, the miners can quickly leave the disaster area by wearing it through a tunnel filled with harmful gases.According to its working principle, the self-rescuer can be divided into filter type and isolation type.According to the principle of oxygen generation, the isolated self - rescuer can be divided into two types: chemical oxygen self - rescuer and compressed oxygen self - rescuer.The structure, working principle and matters needing attention of filter type self - rescuer, chemical oxygen self - rescuer and compressed oxygen self - rescuer are introduced in detail.
Production Rescuer Equipment,Self Rescuer Breathing Apparatus,Rescue Equipment,Mining Self Rescuer Equipment
Jining Dongda Electromechanical Co.,Ltd. , http://www.coal-mine-equipment.com