Common faults and solutions of C-type chain scraper conveyor

Common faults and solutions of C-type chain scraper conveyor

1. Mechanical components malfunction

Chain failure:

Chain quality issues: The material and manufacturing process of the chain are insufficient, such as weak link connections and improper heat treatment, resulting in insufficient chain strength.

Chain wear: During long-term operation, the chain continuously rubs against parts such as chutes and sprockets, resulting in a gradual reduction in the cross-section of the chain links and a decrease in strength. When the tension is limited, it is easy to break the chain.

Scraper chain too tight or too loose: Tightening the chain will increase the initial tension of the chain, accelerate the wear of the chain, shorten the service life, and there is no buffer space when the chain gets stuck; If the chain is too loose, it is easy to form stacked chains, causing the scraper to go out of the groove, resulting in chain jamming and chain breakage.

Abnormal spacing between scrapers: When the distance between scrapers exceeds twice the required distance, when running to the machine head, due to the tension of the chain, the chain without a scraper cannot slide in the scraper groove, and the next scraper also stretches with the chain, interfering with the coal unloading plate of the machine head, causing chain jamming and breakage.

2. Scraper chain floating chain, inclined pull or groove failure

Tank body problem: The bottom of the groove is uneven, not straight, resulting in grooves or deformation, which causes the scraper chain to be unable to maintain linear motion during operation, resulting in floating chains, diagonal pulling, or out of the groove phenomenon.

Inappropriate tightness of scraper chain: If the scraper chain is too tight or not adjusted properly, the material will be squeezed into one side of the chute, and the scraper chain will run on the material. A slight tilt may cause it to fall off the chute.

Scraper problem: The scraper is missing and bent too much, making it easy for the scraper to leave the groove at the curved chute; Loose bolts connecting the scraper and chain can also cause the scraper to shift in position, leading to malfunctions.

3. Malfunction of the driving device

Motor malfunction:

Insulation damage: When installing the motor, the rotor winding or stator winding is damaged, resulting in a decrease in the motor's insulation to ground or between phases. After the motor heats up, it is easy to cause phase to phase short circuit or grounding.

Power supply voltage issue: The power supply voltage is too low, the load suddenly increases, the starting voltage is too high, resulting in insufficient power station capacity, and the long time between the head and tail motors may cause the motors to fail to start or operate abnormally.

Restricted heat dissipation: Poor heat dissipation of the motor, insufficient or blocked water, and prolonged overload operation can cause the motor temperature to be too high, affecting its performance and lifespan.

4. Gearbox malfunction

Oil leakage: Poor oil seal material, damaged sealing ring, loose joint surface, and loose bolts of various bearing covers can all cause oil leakage in the reducer.

High noise: unclean lubricating oil, metal debris in the reducer, insufficient or excessive oil volume, severe wear or damage to bearings or gears, excessive bearing clearance, etc. This will cause the reducer to produce significant noise during operation.

5. Other faults

Chain malfunction:

Material blockage: The conveyed material contains large blocks of material or debris. During the operation of the scraper chain, these large pieces of material or debris may get stuck between the scraper and the chute, causing abnormal operation of the scraper chain.

Chain wheel failure: The chain wheel is worn and aged, or foreign objects are bitten in, causing the scraper chain to detach from the teeth, resulting in chain jamming failure.

Chute wear: When material flows in the chute, it will cause friction and impact on the inner wall of the chute. Under long-term action, the inner wall of the chute will gradually wear down, and in severe cases, material leakage may occur, affecting the normal operation of the conveyor.

Common faults and solutions of C-type chain scraper conveyor