what is the common faults and solutions of the conveyor chain?

Question

Accepted Answer

The chain drive uses a wide variety of types of chain and complete products, including transmission tooth chain, stepless transmission chain, long pitch conveyor chain, short pitch roller chain, double pitch roller conveyor chain, double speed conveyor chain, transmission Use sleeve chain, bending roller chain for heavy-duty drive, double-pitch roller chain for transmission, short-pitch roller conveyor chain, plate chain, etc.

1, stainless steel chain

As the name suggests, the stainless steel chain is made of stainless steel as the main casting material. This chain has good corrosion resistance and can adapt to a higher or lower temperature working environment. The main application areas of stainless steel chains are the food manufacturing and processing industry, the chemical industry and the pharmaceutical manufacturing industry.

2, self-lubricating chain

The necessary manufacturing material for the self-lubricating chain is a special sintered metal impregnated with lubricating oil. The chain made from this metal has a wear-resistant, corrosion-resistant ability, and can be self-lubricating, no maintenance, and more convenient to use. The working life is also longer. Self-lubricating chain is suitable for occasions with high abrasion resistance and is not easy to maintain, such as food automation production lines.

3, rubber chain

The method of manufacturing the rubber chain is to add various rubbers to the outside of the attachment plate after adding U-shaped attachment plates to the outer chain links of the ordinary chain. The rubber used for the rubber chain is mostly natural rubber NR or silicone rubber SI, so that the chain can obtain better wear resistance, and can reduce noise during operation and increase anti-vibration capability.

4, high strength chain

The high-strength chain is a special roller chain, which is based on the original chain to improve the shape of the chain plate, and the special treatment of the chain plate, the chain plate hole and the pin shaft. High-strength chains have good tensile strength, 15% to 30% higher tensile strength than ordinary chains, and have good impact resistance and fatigue resistance.

There are several types of failures in the chain conveyor chain: damage to the chain, removal of the conveyor chain in the chain slot, loss of the conveyor chain on the power sprocket, breakage of the link chain, and damage to the chain link.

1. The damage of the chain plate is mostly excessive wear and bending deformation, and occasional cracking phenomenon. The main reasons for this are as follows: the bottom plate of the chain plate machine slot is unevenly laid, or the bending angle beyond the design requirements; the bottom plate of the chain plate machine slot is not well connected, or local deformation occurs;

2. The conveyor chain is pulled out from the slot of the chain plate. The main reasons for this are: the bottom plate of the chain plate conveyor is not paved and straightened according to the design requirements during laying, but is uneven and excessively curved; the chain plate Or the slot of the chain plate is seriously worn so that the gap between the two is too large;

3, the power sprocket and the transmission chain can not be meshed properly, resulting in the transmission chain off the power sprocket, there commonly known as "tooth jumping" phenomenon. The main reasons for this are: the wear of the power sprocket is serious or stir-in debris; the two chains are inconsistent;

4. The link chain is broken. The various link chains used in China's chain-plate conveyors are produced in accordance with the relevant standards. The breaking load is approximately 10 times that of the chain plates, and the safety factor is large. Theoretically, it should not happen that the chain-breaking accident occurs, but actually The use of the connection chain failure rate is relatively large, the main reasons for its production are: long-term exposure to pulsating load, far below the breaking force, fatigue failure, the fracture is generally at the link of the arc and the transition of the link; production Manufacturing quality does not meet standards, materials and heat treatment levels do not pass;

5, damage the link chain. In actual use, since the link chain is often slightly larger than the conveyor chain and the wear condition is severe, the link chain becomes a weak point in the entire transport chain. Its main forms of damage are severe wear, fracture, and pull-open. Its main causes are: long-term exposure to pulsating loads, fatigue damage, loose connection bolts or bolts, failure to find supplements in time, resulting in uneven stress on the contact links or Lat.