Bridge crane brake is very important spare parts for double girder overhead cranes. In order to meet the working needs of various mechanisms of the bridge crane and ensure the safety of the operation, each working mechanism of the double-beam bridge crane should be equipped with reliable mechanical brakes.
The role of the bridge crane brakes in the various mechanisms of the crane mainly has the following principles:
1. Deceleration braking: decelerate and stop the running mechanism
2. Control braking: make the mechanism run at the required speed through braking
3. Maintain the brake: When the mechanism loses its drive, the mechanism is braked to prevent the mechanism from moving under the action of load, gravity, wind and other external forces
The following three principles should be followed when choosing a double-beam bridge crane brake:
The bridge crane brake is a highly versatile component product, and the products have been standardized. When choosing a brake, you should choose a product that meets our country’s current standards. If domestic standard products cannot meet the requirements, products that meet the relevant product standards can be selected. If domestic and foreign standard products cannot meet the requirements, try to choose the finalized products of domestic and foreign brake manufacturers. If they still cannot meet the requirements, they can design themselves or entrust professional organizations according to the requirements.
When selecting a bridge crane brake, it is necessary to fully consider that the brake specification is consistent with or similar to the center height of the mechanism brake.
When selecting braking methods and bridge crane brakes, the safety of each mechanism of the bridge crane should be fully considered, and the safety requirements of the mechanism should be matched. If the quality of the double-beam bridge crane brake is not good enough, it is prone to failure, so when you encounter problems, we need to know the cause of the crane brake failure, and solve it in a targeted manner.
The brake is an important safety device on the double-beam bridge crane. It can brake the motor to ensure that the mechanism and other operating mechanisms can be accurately and reliably stopped at the specified position. Common brakes include block brakes, disc brakes, and band brakes and cone brakes.
There are many common brake failures, such as insufficient braking force, brake failure, excessive brake wheel temperature, and brake arm not opening, etc. There are many reasons for these failures:
■The brake band or the brake wheel is seriously worn, part of the brake band has fallen off, the impeller of the hydraulic push rod brake release device cannot rotate normally, the lock nut falls off and the pull rod falls off, the main spring adjustment is not tight enough, and the brake belt , there is oil pollution between the brake wheels, and the movable hinge is stuck;
■ The gap between the brake and the gasket is unreasonable, too large or too small;
■ The brake pad has severely fallen off, the main spring has failed, and the long-stroke electromagnet has been blocked;
■ The main components of the double-beam gantry crane brake are damaged;
■ The hinge is stuck and the braking torque is adjusted too much;
■The amount of oil in the hydraulic cylinder of the hydraulic push bar release is insufficient, and the oil used by the latter does not meet the standard.
The prevention measures summarized after years of practical experience are as follows:
Maintenance personnel and crane manufacturers should regularly maintain the brakes of the double-beam overhead crane. Before each operation, they need to check the brakes of the lifting mechanism, and check the brakes of the operating mechanism every day to analyze the results of the inspection. To ensure that the brake can work accurately and safely, and it is forbidden to work with diseases.
■At the same time, the brakes need to be regularly repaired and maintained to ensure the safety performance during use. The inspection contents of the double-beam overhead crane brake include the following:
■There is no jamming of the hinge and no loosening of the fastening parts;
■ Check whether the movement of each component is normal and sensitive;
■Check whether the degree of wear between the brake wheel and the brake band is within a reasonable range, and check whether there is oil contamination in the gap.
■As a professional crane manufacturer, we can not only supply you the whole overhead crane system but also can supply you the crane spare parts. For the bridge crane brake, if you have any questions, please contact us freely.
