Electric single-girder crane is a kind of lifting machinery used for lifting and transporting objects in workshops or warehouses where work is not busy. As mechanical equipment, some failures may occur after long use, which will affect the production of enterprises. The editor introduces the common faults and solutions of electric single-beam cranes.
During the use of the crane, the common faults and treatment methods are shown in the following table:
| Abnormal phenomenon | reason | Repair method |
| 1. The gear makes a noise when it is running. | The oil in the reducer is cut off; the gear is worn out and the gear mesh is poor. | Add oil and check if the gear is loose on the shaft. If the gear is excessively worn, it should be replaced with a new gear. |
| 2. The lubricating oil from the bearing of the reducer housing flows out of the reducer along the splitting surface and vibrates. | The bearing is faulty and the journal is stuck. Oil leaks, loose screws. The installation center is not correct, and the coupling is damaged. |
Check the bearing condition, remove it, and replace the lubricating oil. Tighten the screws, replace the gasket, and scrape the flat surface. |
| 3. Unsteady walking and skew phenomenon found. | Excessive wear of the wheels. Due to the uneven wear diameter of the driving wheels, the wheel-rail contact points are not on the same reference plane. |
Replace the walking wheel. When the amount of wear does not exceed 3 mm, the driving wheel has the same diameter. |
| 4. The running direction does not match the direction indicated by the button. | The three-phase power cord is connected incorrectly. | Correct wiring errors. |
| 5. The limit switch does not work | The limit switch circuit is short-circuited. The wiring from the limit switch to the controller is incorrectly connected. |
Check the wiring. Correct wiring errors. |
In order to reduce the probability of failure of electric single-girder cranes, attention should be paid to crane maintenance during daily use. Only the correct use of regular inspections and frequent attention to maintenance can ensure the normal and safe operation of the crane. The inspection is mainly to observe and find the worn or damaged parts, and then repair or replace them. At the same time, the welding reliability of all the fastening elements must be checked.
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