How to choose sieve plate
Writer： admin Time：2020-05-19 15:18 Browse：℃
The high-efficiency vibrating screen works by using the double-rotation vibration generated by vibrator excitation. The upper rotating weight of the vibrator causes plane whirl vibration on the screen surface, while the lower rotating weight produces conical surface oscillating vibration on the screen surface, and its combined effect causes the screen surface to produce double-rotating vibration. Its vibration trajectory is a complex space curve. The projection of the curve on the horizontal plane is a circle, and the projection on the vertical plane is an ellipse. The amplitude can be changed by adjusting the exciting force of the upper and lower rotating weights. Adjusting the spatial phase angle of the upper and lower weights can change the curve shape of the trajectory of the screen surface and change the trajectory of the material on the screen surface. The selection of the working sieve plate of the vibrating screen is very important. The selection of the vibrating sieve plate of Chai Shang Trading Company is as follows:
The main reason that the steel structure sieve plate is easy to damage and easy to block is that the steel structure sieve plate has strong rigidity. It is a rubber sieve plate which can choose steel skeleton polyurethane to replace the steel knot sieve plate to soften the rigidity. The main features are:
1. Polyurethane is a high compound between rubber and plastic, and its wear resistance is 3 to 4 times that of manganese steel. The strength is 3 ~ 5 times that of rubber. Therefore, the sieve plate is resistant to wear and deflection, has a long service life and is light in weight.
2. The steel frame of the sieve plate is cast in polyurethane rubber and exposed to give full play to the performance of the polyurethane elastomer. The sieve plate and the sieve beam are elastically connected. When the sieve plate and the sieve beam are timed, the bolts are pre-tensioned to form Lock, thereby preventing the loosening of the sieve plate.
3. During the vibration of the sieve, the surface of the polyurethane rubber sieve plate can generate secondary vibration, which is conducive to the self-cleaning of the sieve holes without blocking the sieve holes.
At present, most of the sieve plates used in coal preparation plants are traditional structural sieve plates, and the following defects appear after use.
1. The sieve plate hole is worn from a cylindrical shape into a rounded table shape. When the sieve is working, the material is embedded in the sieve hole and it is not easy to pass through, so the sieve hole is plugged. Dehydration effect.
2. When a bolt that fixes the screen plate is worn or loosened, the plate periodically flexes with the vibration of the screen, and the screen beams are constantly beaten to make the screen plate fatigue break or vibration welding.
Modification and selection of vibrating screen plate:
From the above, the main reason that the steel structure sieve plate is easy to be damaged and easy to block is that the steel structure sieve plate has strong rigidity. It is a rubber sieve plate which can choose steel skeleton polyurethane to replace the steel knot sieve plate to soften the rigidity. The advantages are as follows.
1. The steel frame of the screen plate is cast in polyurethane rubber and exposed to give full play to the performance of the polyurethane elastomer. The screen plate and the screen beam are elastically connected. When the screen plate and the screen beam are timing, the bolts are pre-tightened to form Lock, thereby preventing the loosening of the sieve plate.
2. During the vibration of the sieve, the surface of the polyurethane rubber sieve plate can generate secondary vibration, which is conducive to the self-cleaning of the screen hole without blocking the screen hole.
3. Polyurethane is a high compound between rubber and plastic, and its wear resistance is 3 to 4 times that of manganese steel. The strength is 3 ~ 5 times that of rubber. Therefore, the sieve plate is resistant to wear and deflection, has a long service life and is light in weight.
Since the establishment of Chai Shang Trading Company, the company has made sophisticated modern management systems and made independent innovations. It has brought together a group of scientific and technological elites. The company has long-term cooperation with domestic and foreign scientific research units and introduced advanced technologies and processes at home and abroad. A variety of crusher models, high-efficiency sand making machine production lines, stone crusher production lines, mining vibration screening machines, electromagnetic vibration feeders, energy-saving high-efficiency ball mills, mining rotary dryers, etc., high technical content and high reliability , Low use and maintenance cost, our products have been at a leading level, has been exported to Russia, the Middle East, Africa, Southeast Asia and other countries. For more information about the screening equipment, please contact the polyurethane screen manufacturer.
