The JZ - 400 series electromagnetic drum brake is a member of the JZ series of energy - saving electromagnetic drum brakes. It is widely used in industrial heavy - duty scenarios with its normally closed design and excellent performance. Here is a detailed introduction to its core parameters, structural principles, performance characteristics, and application fields:
Core Technical Parameters
| Parameter | Details |
|---|---|
| Applicable wheel diameter | 400 mm |
| Overall dimension parameters | The length, width and other key dimensions are 505mm, 180mm, etc. (specifically, dimensions such as installation and connection include a value of 350mm for parameter e, 180mm for f, 350mm for g, 782mm for h, etc.) |
| Power supply parameters | AC 380V, 50Hz |
| Operating environment conditions | The ambient temperature ranges from -20°C to +40°C, the relative humidity is no more than 90%, and the altitude is less than 2000m |
| Compliance standards | Its connection dimensions and braking torque parameters meet the JB/ZQ4388 - 86 standard, and technical requirements comply with the JB/T7685 - 2006 standard |
Structural Composition and Working Principle
Structural composition: The brake is mainly composed of an electromagnet, armature, screw, brake arm, brake shoe, return spring and other components. It is equipped with riveted brake shoes as standard, and can also be customized with a clamped integral molding structure if required. In addition, its main swing hinge points are equipped with self - lubricating bearings, which can improve transmission efficiency.
Working principle: It adopts a normally closed design. When the power is turned on, the electric control box first supplies a strong current to the electromagnetic coil for excitation, making the armature quickly and reliably pull in. Then it switches to a weak current to maintain power supply. The armature pushes the screw to drive the brake arm, so that the brake shoe opens, and the brake is released to allow the equipment to run normally. When the power is cut off, the electromagnetic force disappears. Under the action of the return spring, the screw drives the armature to reset, and the brake shoe is pressed tightly on the inner side of the brake drum. The friction force generated realizes the braking of the equipment.
Key Performance Characteristics
Safe, reliable and energy - efficient: The normally closed design ensures that the brake can automatically engage in case of power failure, which is a key safety guarantee for equipment that needs to prevent sudden movement, such as hoisting machinery. At the same time, the power supply mode of converting from strong current to weak current after the armature is pulled in avoids the problem of excessive power consumption of the electromagnetic coil, and achieves a good energy - saving effect.
Stable operation and long service life: It uses non - asbestos gaskets, which are environmentally friendly. During the braking process, it runs stably without noise. Moreover, the self - lubricating bearings at the hinge points do not need additional lubrication during use, which not only reduces the daily maintenance work, but also improves the transmission efficiency and prolongs the overall service life of the brake.
Convenient customization and strong adaptability: It can not only be customized with different types of brake shoes, but also can be equipped with brake drums or drum couplings of different structures according to user needs. For outdoor occasions affected by rain and snow erosion or corrosive gases, anti - corrosion type products can also be customized to meet the needs of different working conditions.
Typical Application FieldsThis series of brakes are mainly used for deceleration and parking braking of various mechanical drive mechanisms. Its common application scenarios include lifting and transportation equipment such as cranes and winches, port loading and unloading machinery, metallurgical workshop auxiliary equipment, and mining transportation machinery. In addition, it is also applied to the drum motor braking of drum type pumping units. It can cope with the frequent start - stop and emergency braking requirements of these devices, ensuring the safe and stable operation of the equipment.
