Common faults and troubleshooting methods of general double-beam bridge cranes

The universal double girder bridge crane is a crane that runs across the track above the factory building. Lifting hook cranes use hooks as picking devices, which are suitable for loading and unloading in the solid spans of workshops and warehouses of general industrial and mining enterprises. Such a failure, then how do we solve it?

1. The brake cannot brake the brake wheel

Cause 1. The hinge of the lever is stuck. 2. There is oil stain on the brake wheel and friction plate. 3. The electromagnet core does not have enough stroke. 4. The brake wheel or friction plate is severely worn (a basic type of component failure). 5. The main spring (Spring) is loose and damaged. 6. The lock nut is loose and the tie rod is loose.

Remedy 1. Lubricate and eliminate stuck faults. 2. Clean oil stains. 3. Adjust the brake. 4. Replace the friction plate. 5. Replace the main bullet and lock nut. 6. Tighten the lock nut. 7. Overhaul the impeller (referring to the wheel disc equipped with moving blades) pushing mechanism.

2. The brake is hot, the friction plate emits a burnt smell and wears out (a basic type of component failure) quickly

Causes of failure 1. After the brake shoe is released, there is no uniform (jūn yún) and the brake wheel completely disengaged, resulting in friction. The single beam crane has two operation modes: ground and air. There are two types of ground operation: wired handle operation and remote control handle operation; aerial operation refers to operation in the driver's cab. The driver’s cab has two types: open and closed. It can be divided into two types for installation on the left or right according to the actual situation. There are two types of entry directions: side and end to meet the needs of users. 2. The gap between the two brake shoes and the brake wheel is uneven, or the gap is too small. 3. The auxiliary spring (Spring) of the short-stroke brake is damaged or bent (Bend). 4. The working surface of the brake wheel is rough.

Remove (Remove) method 1. Adjust the gap. 2. Adjust the gap. 3. Replace or repair the auxiliary spring (Spring). 4. Process the surface of the brake wheel as required.

3. The reducer (divided into gear reducer, worm reducer, etc.) has uneven (jūn yún) knocking sound when gears are meshed, and the casing vibrates

The cause of the fault is that the tooth surface is defective, and the gear teeth are not in contact along the entire tooth surface but at a corner. The single-beam crane has two modes of operation on the ground and in the air. There are two types of ground operation: wired handle operation and remote control handle operation; aerial operation refers to operation in the driver's cab. The driver’s cab has two types: open and closed. It can be divided into two types for installation on the left or right according to the actual situation. There are two types of entry directions: side and end to meet the needs of users. Single-girder cranes usually refer to single-girder bridge cranes. The main beams of single-beam crane bridges mostly use I-shaped steel or a combined section of steel and steel plates. Lifting trolleys are often assembled by chain hoists, electric hoists, or hoists as parts of the lifting mechanism.

Remedy Replace the gear.

4.The reducer housing, especially the place where the bearing is installed heats up

Causes of failure 1. The bearing is broken. 2. The journal is stuck. 3. Wear of gear teeth. 4. Lack of lubricating oil.

Eliminate (Remove) method 1, replace the bearing. 2. Replace the bearing. 3. Trim the gears. 4. Replace lubricating oil

5. The wire rope of general double girder bridge crane wears quickly or is often damaged

Cause 1. The diameter of pulley and reel is too small. 2. The size of the rope groove on the reel does not match the rope diameter, which is too small. 3. There is dirt and lack of lubrication. 4. The lifting limit baffle is not installed correctly, and the rope is often ground. 5. The bottom of the pulley groove or the rim of the pulley is not smooth and defective.

Remove method 1. Replace a more flexible wire rope (composed of steel wire, rope core and grease) or increase the diameter of the pulley or drum. 2. Replace the wire rope with the same lifting capacity but smaller diameter, or replace the pulley and drum. 3. Cleaning and lubrication. 4. Reinstall. 5. Eliminate defects.

6. Crane carriage bridge runs skewedly

Fault reason 1. The diameter error of the two active wheels is too large. 2. Not all active wheels are in contact with the track. 3. The axis of the driving wheel is not correct. 4. The metal structure is deformed. 5. The track installation quality is poor. 6. There is oil on the top of the rail

Eliminate (Remove) method 1. Measure and replace the wheel. 2. Drive the full-load trolley to the end where the cart is behind. If the cart goes straight, it means that the driving wheel at this end is not in full contact with the track, and the wheel pressure is small. You can increase the diameter of the driving wheel at this end. 3. Check and eliminate the axis deflection phenomenon to correct. 5. Adjust the shaft track to make the track meet the standard. 6. Eliminate oil stains.

7. Universal double girder bridge crane crane trolley sliding

Causes of failure 1. Oil stains on the track, etc. 2. Different wheel pressures. 3. The elevation difference between the two tracks in the same section is too large

Elimination method 1. Eliminate. 2. Adjust wheel pressure. 3. Adjust the track.

8. General purpose double girder overhead crane truck runs on three legs

Causes of failure 1. Excessive wheel diameter deviation 2. Unreasonable installation. 3. Deformation of the trolley frame.

Remedy 1. Process the wheels as required 2. Re-adjust and install according to technical conditions. 3. Correction of the frame.

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