Discussion on several common damage causes of stainless steel chain
The stainless steel chain as a common transmission power device, through the hyperbolic arc of the "chain" design, reduce the friction, so that the power ratio of the larger and slower operation of the place, than the belt drive has obvious advantages, such as tanks, pneumatic compressors, etc., but the transmission speed can not be too fast, because the chain flexibility is not as good as belt conveyor.
The stainless steel chain is especially suitable for corrosion-resistant, cleaning or demanding areas of certain chemicals and for high and low temperature occasions.
1. Abrasion damage
In the open drive or against the worst strength, poor quality of the stainless steel chain, wear is usually the main damage method of the stainless steel chain drive. Stainless steel chain after wear chain section and chain length elongation, meshing point along the tooth profile operation Edge to the tooth top movement, the ultimate cause of the jump tooth or off chain. Wear is primarily caused by the outer chain section. When the pin shaft and sleeve inside the regiment outside wear, the hinge gap increases, so that the outer chain section elongation. The internal chain distance depends on the adjacent rollers with the same side of the bus, because of the cylindrical surface of the rollers and the sleeve wear very little, so the inner chain section will not elongate. When the stainless steel chain wear elongation reached 3%, the stainless steel chain will be broken off the chain, then the elongation rate of the outer chain can reach 6%. In order to advance the wear life of the stainless steel chain, it is necessary to keep an eye on the smoothness and to constrain the useful force in the range of permissible operating loads.
2. Fatigue damage
Stainless steel chains with outstanding smooth premises and wear resistance are usually damaged by fatigue damage. Because the stainless steel chain has tight edges and loose edges, the stainless steel chain parts Accept the load of the variable size alternating. In each winding of the chain, the stress of the stainless steel chain is tensile and tortuous, the force of the pin is cut, kneaded and twisted, the rollers accept kneading and impact, and the sleeve accepts kneading, shearing and impact. Under the effect of alternating loads, the cracks are produced, and the crack propagation is caused by fatigue fracture. The impact times of stainless steel chain can be considered as the stress cycle times of stainless steel chain parts. In practice, the stainless steel chain is usually only considered the impact of the hinge during each turn, so the stainless steel chain rotates every minute as the number of shocks per minute.
In order to advance the fatigue strength of stainless steel chain, the factory selected a variety of methods to strengthen the parts, such as chemical heat treatment to make the surface of the parts carburizing, stainless steel chain mining hole to resist stress gathering, widen the stainless steel chain waist width to the stress of the smooth hole to gather, the parts of the shot
3. Damage of connection strength
Stainless steel chain in the application process, under the operating load effect, the outer stainless steel chain and PIN axis cooperation, as well as the inner stainless steel chain and sleeve cooperation joint loose, so that the stainless steel chain hole wear, stainless steel chain agile elongation and damage. Because the stainless steel chain pin axle head riveting parts loose, stainless steel chain out, or because reluctant pin cut, card spring flying off the formation of the chain section will be damaged stainless steel chain.
4. Stainless Steel chain bonding
Stainless steel chain running speed through the high and smooth when the pin shaft and sleeve abrasions, sticky card can not be used.
5. Static Pull Off
In the Low-speed overload, the load spike exceeds the allowable breaking load, which causes the stainless steel chain to pull off.
Stainless steel chain repeated starting, braking, reversing the formation of many breakthroughs, stainless steel chain due to side grinding and thinning, or because of the sprocket teeth wear and plastic deformation, sprocket devices, such as the surface of the stainless steel chain may be damaged.