20MG40.11.02 China made Medium speed coal mill elastic sleeve
Description of 20mg40.11.02 Elastic sleeve
Elastic sleeve 20mg40.11.02 is installed at the connection part of the coupling, which absorbs the vibration and impact during operation through its own elastic deformation, and compensates the installation deviation between the two shafts at the same time, which provides an important guarantee for the efficient operation of the coal mill.
The elastic sleeve 20MG40.11.02 is usually cylindrical, the inner wall is closely matched with the pin of the coupling, and the outer wall is embedded in the pin hole of the coupling flange to form a flexible connection structure. The whole adopts a multi-petal or integral design, and the surface is distributed with uniform flanges or grooves. These structures can not only increase the friction between the elastic sleeve and the connecting piece, prevent relative sliding, but also change in multiple directions when the force is applied. Deformation disperses stress and improves the overall elastic cushioning performance. Both ends of the elastic sleeve are chamfered to facilitate smooth insertion into the pin hole during installation, while avoiding early damage caused by stress concentration during assembly.
Elastic sleeve 20mg40.11.02 needs to take into account excellent elasticity, wear resistance and aging resistance, usually made of nitrile rubber or polyurethane materials. Nitrile rubber has good oil resistance and elasticity, can maintain stable performance in the lubricating oil environment that may be exposed to the coal mill, and its Shore hardness is generally controlled between 60-80 degrees, which not only ensures sufficient carrying capacity, but also Can provide suitable elastic deformation. Polyurethane material has higher wear resistance and tear strength, and is suitable for working conditions with large transmission torque. By adjusting the material formula, it can still maintain good elasticity in low temperature environment and avoid brittle fracture caused by low temperature. In addition, some high-end elastic sleeves will be embedded in nylon or metal frames inside the rubber to further enhance structural strength and extend service life.
The elastic sleeve 20mg40.11.02 is to buffer vibration reduction. When the coal mill is running, the speed of the motor and the reducer may fluctuate instantaneously. The elastic sleeve absorbs the impact caused by this speed difference through its own elastic deformation and reduces the vibration to the equipment. The transmission of other parts reduces the wear of precision parts such as bearings and gears. The second is to compensate for deviations, due to manufacturing and installation errors or thermal expansion and contraction in operation, the two shafts connected by the coupling may have axial, radial or angular deviations, and the flexible characteristics of the elastic sleeve can compensate for these deviations through deformation. Avoid additional torque caused by rigid connection and protect shaft system components.
Application of 20mg40.11.02 Elastic sleeve
In the power transmission system of the ZGM113N type coal mill, the performance of the elastic sleeve 20MG40.11.02 directly affects the running stability of the coupling. When the coal mill is started, the torque output by the motor is transmitted to the elastic sleeve through the coupling pin, and then transmitted to the input shaft of the reducer by the elastic sleeve. During this process, the elastic sleeve stores elastic potential energy through compression deformation and smoothly releases Power to avoid damage to the shaft system caused by starting impact. In the normal operation stage, the elastic sleeve continues to withstand periodic torque changes, and fatigue stress will be generated inside the material. If the elastic sleeve is aged or worn, it will cause the transmission efficiency to decrease, the vibration will increase, and even abnormal noise will occur, which will affect the normal output of the coal mill.
HKZX-2025-09-29-A
