The ZWZA200 - 160 is a typical DC electromagnetic drum brake under the ZWZA series. It has a rated braking torque of 160 N·m (128 N·m when the duty cycle is 40%) and is specifically designed for DC - driven industrial equipment. It stands out in industrial scenarios with its stable braking performance, convenient maintenance, and strong adaptability. Here is a detailed breakdown of its advantages, application scenarios, and usage considerations:
Core Advantages
Stable and Balanced Braking Performance: It is equipped with an interlocking shoe clearance balancing device and a shoe self - aligning device. These devices can keep the clearance of the brake shoes on both sides consistent all the time, eliminating the need for frequent manual adjustment and completely avoiding the problem that one side of the brake lining sticks to the brake wheel. In addition, the new type of armature self - aligning device ensures that the armature and the magnetic yoke are always closely fitted, which guarantees stable braking force output during the operation of the brake.
Long Service Life and Low Operational Consumption: The main hinge points of the brake are installed with self - lubricating bearings. This design not only improves the transmission efficiency but also avoids the trouble of regular lubrication during use, thus prolonging the service life of the equipment. At the same time, the brake spring is placed in a closed spring tube, which can effectively prevent the spring from being damaged by external impact and contaminated by dust, ensuring the stability of the spring's elastic force during long - term use.
Convenient Maintenance and Replacement: The brake lining adopts a card - mounted integral structure. When the lining is worn, it can be replaced quickly without disassembling the whole brake. Moreover, users can choose brake linings of different materials such as semi - metal non - asbestos hard, semi - hard, and soft types according to different working conditions, which greatly meets the diverse usage needs. Besides, the brake is designed to replace the old ZWZ series products, and its installation dimensions and interfaces are standardized, making it convenient for equipment upgrading and transformation.
Reliable Fail - Safe Braking: It adopts the fail - safe principle of power - off braking. It relies on the spring force to realize braking when the power is cut off, and electromagnetic force to release the brake when the power is on. This ensures that in case of sudden power failure or electrical failure of the equipment, the brake can quickly lock the running part, preventing safety accidents such as equipment sliding and load falling.
Application Scenarios
This brake is specially applicable to DC - driven or DC power grid - powered equipment and is not suitable for AC - driven machinery. Its main application fields include:
Lifting and Hoisting Machinery: It is widely used for deceleration and parking braking of electromagnetic hoists and various lifting equipment. For example, in workshops and factories, it can be matched with small and medium - sized DC - driven cranes and winches to ensure stable braking when lifting and transferring workpieces.
Port and Material Handling Equipment: It plays a key role in port loading and unloading machinery. It can be applied to DC - driven loading and unloading tools such as container lifting devices and bulk cargo conveyors, realizing rapid and stable braking during material transfer and improving the safety and efficiency of port operations.
Metallurgical and Construction Machinery: In the metallurgical field, it is suitable for braking related mechanisms of DC - driven equipment in steelmaking and rolling workshops. In the construction field, it can be used in DC - powered lifting platforms and material conveyors on construction sites to ensure the safety of equipment operation at construction sites with complex environments.
Belt Conveyor Systems: It is used for the working braking of DC - driven belt conveyors. These conveyors are often used in scenarios such as coal transportation and mineral processing. The brake can prevent the material from reversing due to inertia when the conveyor stops, ensuring the normal order of the production line.
Usage Notes
Comply with Power Supply Specifications: It is a DC electromagnetic brake and must be used with a matching DC power supply. It cannot be directly applied to AC - driven equipment. When in use, it is necessary to confirm the matching of the electromagnet and the power grid parameters to avoid damage to the coil caused by voltage mismatch.
Adapt to the Operating Environment: It is suitable for working environments with a temperature range of - 20°C to 40°C and a relative humidity not exceeding 90%. It should be avoided to be used in places with flammable, explosive, and highly corrosive gases. If it is used outdoors, it is necessary to configure rain and snow protection devices to prevent the internal components such as the electromagnet and spring from being eroded and affecting the performance.
Regular Inspection and Maintenance: Regularly check the wear condition of the brake lining. Once the wear exceeds the limit, it should be replaced in time to avoid reducing the braking efficiency. At the same time, clean the surface of the brake drum regularly to remove rust and debris. If the runout of the brake drum exceeds the allowable range, it should be repaired or replaced. In addition, check the tightness of the closed spring tube regularly to ensure that the internal spring is not contaminated or damaged.
Standardize Torque Adjustment: The brake spring is arranged in a square tube with a scale. Users can directly read the braking torque value through the scale when adjusting, without complicated measurement and calculation. When adjusting, it is necessary to operate according to the rated torque requirements of the equipment to prevent insufficient braking force or excessive wear of the lining caused by improper torque.
