The crane brake is installed on the rotating shaft of the electric motor to brake the operation of the motor, so that its operation or lifting mechanism can accurately and reliably stop at the predetermined position.
Commonly used are spring type short stroke electromagnetic double brake shoe brakes, abbreviated as short stroke brakes (single-phase brakes); Spring type long stroke electromagnetic double brake shoe brake, abbreviated as long stroke brake (three-phase brake); There are three types of hydraulic push rod dual brake shoe brakes, abbreviated as push rod brakes.
The brake plays an indispensable role in protecting the Overhead crane. It can be said that if the brake device is not installed in the Overhead crane, just as the car does not have the brake function, parking under the effect of inertia is a serious hazard.
Crane brakes are an important factor in ensuring the safe operation of cranes, especially with the increasingly widespread application of cranes today, resulting in more frequent safety accidents. Due to the complex working environment of cranes, it is necessary to ensure the safe selection of crane brakes. The performance of the crane brake, as a core component, directly affects the daily work efficiency and construction efficiency of the crane. Based on this, it is of great significance to strengthen the selection and safety performance analysis of crane brakes
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Safety selection of crane brakes
2.1 Adjusting the braking torque
To ensure the safety of crane selection, it is necessary to analyze the torque performance of the brake. The selected brake needs to match the selection standard, measure the operating size of the brake torque, and based on this, adjust the torque value of the brake through the method of marking.
2.2 Adjusting the Drive Device
The driving device is mainly responsible for the load-bearing action of the crane. By analyzing the device and adjusting the driving device parameters reasonably, it ensures the safety of the crane in practical applications. Relevant data and usage requirements can be annotated and indicated in the application of the driving device. In practical applications, it is necessary to combine the application frequency of the driving device and observe the changes in the actual operation of the crane. Without adding brake pad wear conditions, automatic compensation brakes need to be installed to avoid the driving device from exceeding the range and even causing the brake to disappear. During the adjustment of the driving device, it is necessary to ensure that the crane is in a power off state to detect the brake compensation device. If the travel of the compensation device is small, it is necessary to adjust the driving parameters in a timely manner. In addition, if the gasket experiences deformation issues in long-term application, it can lead to a decrease in compensation stroke, thereby reducing braking force, which requires timely replacement of the gasket.
2.3 Adjusting the compensation device
By installing brake pads in the crane brake, the brake can be effectively compensated. In the practical application process of cranes, due to frequent crane movements and large load capacity, it is necessary to replace and adjust the pads. By adjusting the compensation system and adopting corresponding reinforcement measures, it is possible to avoid the wear of the brake pad and reduce the braking force, otherwise safety hazards may arise due to insufficient braking force. During the adjustment of the compensation device, construction personnel need to follow the adjustment instructions and standards. After the adjustment is completed, a trial run is required to observe whether the compensation mechanism is perfect, in order to ensure the operational performance of the crane
2.4 Backtracking adjustment
After the adjustment of the driving device is completed, it is necessary to conduct a thorough analysis of the brake pad backlash of the crane to ensure that all corners of the brake pad are equal. Otherwise, the backlash on one side may be too large or too small due to different backlash. Due to the direct impact of backtracking on the service life of the brake pad, it is necessary to adjust the standard according to the manual, ensuring that the brake pad is in the center position.