Category: Chains and sprockets

The main reasons for dynamic loads generated by chain sprockets and chain drives during operation are

(1) The chain speed and the angular velocity of the driven sprocket vary periodically, resulting in an additional dynamic load. The greater the acceleration of the chain, the greater the dynamic load will be. The acceleration of the chain can be seen that the higher the speed of the chain wheel, the larger the chain pitch and the fewer the number of teeth of the chain wheel, the higher the dynamic load will be. (2) The chain speed along the vertical direction...

The main forms of failure of roller chain drives

The main forms of chain drive failure are as follows: (1) Chain plate fatigue damage The chain plate will be fatigue damaged after a certain number of cycles under the repeated action of loose side tension and tight side tension. Under normal lubrication conditions, fatigue strength is the main factor limiting the bearing capacity of the chain drive. (2) Roller sleeve...

Heat treatment of 45 gauge steel for gear sprockets

According to the requirements of the sprocket gear: if the impact is small case small can be surface carburizing, nitriding and other technologies! This way the surface hardness is higher, while the base hardness is lower, the wear resistance is good, and it is not easy to fracture. If the impact load is large, it should be tempered, that is, high-temperature tempering. 45#...

Analysis of the design calculation of roller chain drive

1、Failure form of chain transmission 1）Fatigue damage of chain When the chain is working, the chain on both sides of the sprocket is tensioned and slackened on one side. The chain is constantly moving from the loose side to the tight side, so its components are working under variable stress, after a certain number of cycles, the chain plate will be fatigue break...

Chain wheel chain in the scraper conveyor card chain or broken chain cause analysis

Fault: One of the main functions of the scraper conveyor in a comprehensive mining face is to transport the coal blocks cut by the coal miner, and this function is achieved by the chain installed on the scraper conveyor. The chain itself is an elastomer and the uncertainty in the amount of coal cut by the coal miner leads to inconsistent weight of the coal blocks carried by the scraper conveyor chain. Long...

The main forms of failure of roller chain drives

The main failure forms of chain wheel and chain transmission are as follows: (1) Chain plate fatigue damage The chain plate will be fatigue damaged after a certain number of cycles under the repeated action of loose side tension and tight side tension. Under normal lubrication conditions, fatigue strength is the main factor limiting the load-bearing capacity of the chain drive. (2) ...

Analysis of gear design to take full account of process issues

Due to their specificity, gear products must be designed taking into account the influence of all aspects of their blanks, machining, heat treatment and testing. Manufacturing-testing integration can optimize materials and processes, quantitative evaluation, help decision-making, and improve product power density. Especially for bevel gears with curved teeth, since their tools are of non-standard design, the same...

Finishing of gear sprockets and racks

At present, the main methods of gear finishing for industrial applications are gear shaving, gear grinding, gear squeezing, gear grinding and gear honing. Gear shaving is a method of gear finishing by shaving the teeth with a shaving knife on a shaving machine, which is equivalent to a helical gear with many edges on the teeth. It drives the relative rotation of the processed gears, just like the interlocking shaft gear mesh...

Double chain tooth drive roller conveyor, how to determine the roller between

For example, how to determine the center distance between the rollers of a double chain tooth drive roller conveyor? Of course, the center distance should be initially determined according to the structural requirements. However, the center distance required by the structure does not necessarily match the results of the chain link length calculation, so it is necessary to adjust the center distance according to the actual number of chain links in turn after the calculation is completed...

Analysis of the unevenness of motion in chain drives

The chain enters the sprocket and forms a folding line, so the movement of the chain drive is very similar to the belt drive around a positive polygon wheel, see Figure 9. The side length is equivalent to the chain pitch p, and the number of sides is equivalent to the number of teeth of the sprocket z. The distance the chain moves for each week of the sprocket is zp, let z1 and z2 be the number of teeth of the two sprockets, and p be the pitch...

The use and maintenance of garage sprocket chain drive

Correct use and maintenance of the chain drive has a decisive influence on reducing the wear and tear of the chain and improving the service life of the chain drive. The use and maintenance should pay attention to the following points: 1. Reasonable control of processing error and assembly error Reasonable control of pitch error (the difference between the specified pitch and the actual pitch) should be less than 2%; two sprocket wheel teeth end...

Causes and consequences of root cut in gears

The cause of root cut: When the intersection of the tool tooth top line and the mesh line exceeds the mesh limit point N1, and the tool continues to move from position II, the involute tooth profile that has been cut out of the root is cut off again. Consequences of root cutting: A gear with severe root cutting, on the one hand, weakens the bending strength of the gear teeth; on the other hand, it will...

Arrangement, tensioning and lubrication of sprocket chain drive

1、The arrangement of the chain drive The chain drive should generally be arranged in the plumb plane, as far as possible to avoid the arrangement in the horizontal or inclined plane. If it is necessary, it should be considered to add pallets or tensioning wheels and other devices, and design a more compact center distance. 2、Tensioning of the chain drive Purpose: To avoid the chain from draping too much...