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Raw billets, beam billets, and plate billets are lifted using electric lifting magnets.
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Specialized Lifting Electromagnet for High-Speed Wire (Coil)
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Pipe blanks, steel pipes, large round blanks for lifting with electric lifting magnets
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Heavy rail, steel pipe lifting with electric lifting magnets
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Medium-thick steel plate lifting with electric lifting magnet
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Medium-thick steel plate multi-sheet lifting special lifting electromagnet
RELATED INFORMATION
Long-term blocked torque motor type cable reel
The JM□D series long-term stall torque motor cable reels are widely used in large mechanical equipment that requires translational movement, such as bucket wheel stacker-reclaimers, gantry cranes, ship loaders, container cranes, and tower cranes. The power source and signal source are located at the midpoint or endpoint of the stroke, transmitting the power source and control signals through the winding and unwinding of the cable on the cable reel.
Classification:
E-mail：hnyysg0730@163.com
Case Details
Model Description
Host
1. Power Section
Long-term stall torque motor (with brake), special gearbox, collector slip ring box.
Parameters of the long-term stall torque motor[For reference only]
Electrical parameters and characteristics of the long-term stall torque motor
1.1. The tension of the cable is constant from the empty reel to the full reel, suitable for long-term low-speed and frequent forward and reverse operations.
1.2. Unlike common motors, the stall current is low, allowing for long-term stalling and reversing.
1.3. An 8-10 hour stall test has been conducted before assembly, with a motor temperature rise of <65K, and the stall torque drop within 5% under thermal conditions.
Torque Motor Brake Diagram
The brake consists of a yoke, excitation coil, spring, brake disc, armature, gear sleeve, manual release device, screws, etc.
The brake is installed on the rear end cover of the motor, and the installation screws are adjusted to achieve the appropriate air gap value. The motor drive shaft is connected to the brake disc via the gear sleeve.
When the brake's excitation coil is connected to the rated voltage (DC), the electromagnetic force attracts the armature, releasing it from the brake disc. At this time, the motor shaft drives the brake disc to operate normally. When the motor is powered off, the brake is also powered off, causing the spring to press the armature, forcing friction torque between the brake disc, armature, and flange, quickly stopping the motor shaft.
2. Power (Signal) Transmission Section
The collector slip ring box can be divided into power transmission and signal transmission based on its applications, and can be categorized by voltage levels such as 220V, 500V, 3KV, 6KV, 10KV, etc.
II. Cable Reel Section
Reel: Can be divided into multi-layer winding and single-layer winding. For ease of transportation, reels with a diameter ≤3m are of integral structure; reels >3m are assembled on-site.
Schematic Diagram of Assembled Reel
III. Cable Guide Frame Installation Diagram
IV. Electrical Schematic Diagram of Cable Reel
Long-term stall torque motor type cable reel
Working Principle
The power section and speed regulation section of the long-term stall torque motor type cable reel are handled by the motor, which has unique electrical and mechanical characteristics. The motor has a wide speed regulation range and soft mechanical characteristics, allowing the working speed of the motor to change accordingly with load variations; that is, when the load increases, the speed decreases, and when the load decreases, the speed increases. Moreover, the motor can operate stably at any point on its torque-speed characteristic curve for a long time, ensuring that the cable achieves the appropriate winding speed and tension at the corresponding radius on the reel.
1. Winding Cable The motor output torque provides power, driving the reel to collect the cable.
2. Releasing Cable The motor output torque acts as a resistance, preventing the cable from rapidly unwinding from the reel, ensuring the synchronization of cable release.
3. When Stopping The long-term stall motor is equipped with a disc-type normally closed brake, which ensures that when the motor is powered off, the cable will not fall off the reel due to gravity.
Selection Considerations
1. The height of this series of cable reel machines should be ≤3m. If the installation height exceeds 3m, please contact our company for assistance in selection.
2. When ordering, it is necessary to specify the cable specifications, winding length, installation height, and trolley running speed.
3. For single-layer winding, the determination of the reel width W: W = 1.1 times the diameter of the round cable, W = 1.2 times the width of the flat cable.
Appearance Structure and Installation Dimension Table
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Outline Dimension Diagram
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Key words:
Electromagnetic equipment manufacturing, multi-function lifting electromagnet, special lifting electromagnet, multi-purpose lifting electromagnet, permanent magnet coupling hysteresis head
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RELATED PRODUCTS
This series is used for absorbing and lifting cast iron ingots, steel balls, pig iron blocks, machined chips; return materials, iron concentrate powder, cutting heads; packaged scrap steel, etc. The excitation method can be: rated voltage DC220V method; strong excitation method: over-excitation method.
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This series is the most widely used rectangular electromagnet, mainly suitable for lifting square billets, steel ingots, and large initial rolled billets, and can also be used for lifting round billets, section steel, etc. Different magnetic circuit designs are adopted for different types of steel.
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Address: Liji Avenue, Junshan Industrial Park, Yueyang City, Hunan Province
Fax: 0730-8647119