Category Chains and sprockets

The main reason why the sprocket chain drive generates dynamic load during work is

(1) The chain speed and the driven sprocket angular speed change periodically, resulting in additional dynamic load.The greater the acceleration of the chain, the greater the dynamic load will be.The acceleration of the chain is visible, the higher the speed of the sprocket, the larger the chain pitch, and the less the number of sprocket teeth, the dynamic load will increase. (2) The speed of the chain in the vertical direction...

The main failure mode of roller chain drive

The main failure modes of chain drive are as follows: (1) Fatigue failure of chain plate Under the repeated action of the tension of the loose side and the tension of the tight side, the chain plate will suffer fatigue damage after a certain number of cycles.Under normal lubrication conditions, fatigue strength is the main factor limiting the load-carrying capacity of a chain drive. (2) Roller sleeve…

Heat treatment of gear sprocket made of 45 gauge steel

According to the requirements of the sprocket gear: if the impact force is small, surface carburizing, nitriding and other technologies can be carried out!In this way, the surface hardness is high, the matrix hardness is low, the wear resistance is good, and it is not easy to break.If the impact load is large, it is due to the quenching and tempering treatment, that is, high temperature tempering. 45#…

Analysis of Design Calculation of Roller Chain Drive

1. Failure form of chain drive 1) Fatigue damage of chain When the chain is working, the chains on both sides of the sprocket are tensioned and relaxed.The chain continuously moves from the loose edge to the tight edge, so all its components work under the action of variable stress. After a certain number of cycles, the chain plate will have fatigue fracture…

Analysis of the Causes of the Chain Stuck or Broken Chain of the Sprocket Chain in the Scraper Conveyor

Failure: One of the main functions of the scraper conveyor in the fully mechanized mining face is to transport the coal blocks cut by the shearer, which is realized by the chain installed on the scraper conveyor.The chain itself is an elastic body, and the amount of coal cut by the shearer is uncertain, resulting in inconsistent weight of coal blocks carried by the scraper conveyor chain.long…

Simple calculation method of analytical sprocket

1. The number of teeth Z of the sprocket is calculated according to the transmission ratio ι: ι=n2/n2=Z1/Z1 In the formula: n2: the speed of the small sprocket n1: the speed of the large sprocket Z2: the number of teeth of the small sprocket ZXNUMX: The number of teeth of the large sprocket is two, the diameter of the index circle of the sprocket...

The main failure mode of roller chain drive

The main failure modes of sprocket chain transmission are as follows: (1) Fatigue failure of chain plate Under the repeated action of the tension of the loose side and the tension of the tight side, the chain plate will suffer fatigue damage after a certain number of cycles.Under normal lubrication conditions, fatigue strength is the main factor limiting the load-carrying capacity of a chain drive. (2)…

Analytical gear design should fully consider process problems

Due to its particularity, the design of gear products must consider the influence of various aspects such as blank, machining, heat treatment and testing.Manufacturing-test integration can optimize materials and processes, quantitatively evaluate, help decision-making, and improve product power density.Especially for spiral bevel gears, due to the non-standard design of the tool, the same…

Finishing of gears, sprockets, racks

At present, the gear finishing methods used in industry are mainly shaving, grinding, extrusion, grinding and honing.Teeth shaving is to shave teeth with a shaving knife on a shaving machine. It is a method of gear finishing. The shaving knife is equivalent to a helical gear with many edges on the tooth surface.It drives the processed gears to rotate relative to each other, like staggered shaft gears meshing…

How to determine the distance between the rollers of the roller conveyor with double chain teeth

For example, how to determine the center distance between the rollers of a roller conveyor with double chain teeth?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 conform to the result of the chain link length calculation, so it is necessary to adjust the center distance according to the actual number of chain links after the calculation is completed…

Analysis of motion non-uniformity of chain drives

After the chain enters the sprocket, a broken line is formed, so the motion of the chain drive is very similar to that of the belt drive wound on a regular polygon wheel, as shown in Figure 9.The side length corresponds to the chain pitch p, and the number of sides corresponds to the number of sprocket teeth z.For each revolution of the sprocket, the distance the chain moves is zp. Let z1 and z2 be the number of teeth of the two sprockets, and p is the pitch...

Garage sprocket chain drive use and maintenance

Correct use and maintenance of chain drives have a decisive impact on reducing chain wear and increasing the service life of chain drives.The use and maintenance should pay attention to the following points: 1. Reasonable control of machining error and assembly error Reasonable control of pitch error (difference between specified pitch and actual pitch) should be less than 2%;

Reasons and consequences of gear undercuts

The reason for the undercut: when the intersection of the tool tooth top line and the meshing line exceeds the meshing limit point N1, and the tool continues to move from position II, the involute tooth profile that has been cut at the root is cut off again.Consequences of undercutting: gears with severe undercuts, on the one hand, weaken the bending strength of the gear teeth; on the other hand, will…

Arrangement, tensioning and lubrication of sprocket chain drives

1. Arrangement of chain drive The chain drive should generally be arranged in the vertical plane, and should be avoided as far as possible in the horizontal or inclined plane.If it is really necessary, devices such as a pallet or a tensioner should be considered, and a more compact center distance should be designed. 2. The purpose of tensioning the chain drive: to avoid the occurrence of excessive chain sag...