According to the layout of the basket, it can also be divided into horizontal and vertical. The scraper unloading centrifugal dewatering machine uses the centrifugal force of the sieve blue to generate centrifugal force to dehydrate the material, and the scraper is used to discharge the dehydrated material out of the sieve blue. The whole can also be divided into body parts, buffer system, transmission system and lubrication system.
The body contains many components, one of the most important components is the mandrel in the middle of the body and the hollow shaft. It is the key to achieving simultaneous operation of the screen basket and the scraper. Different pulley (or gear) diameter ratios are the key to achieving different speeds for screen blue and scraper. Inside the machine housing
Scraper unloading centrifugal dewatering machine
And the scraper itself has a wear-resistant lining because it has to be in direct contact with the material.
Buffer systems, like vibrating centrifuges, generally use rubber springs for vibration isolation, vibration damping and vibration limiting.
The drive system also consists of two parts. One part is the rotary motion of the screen basket, and the other part is the rotary motion of the scraper. The speed of rotation of the screen basket and the scraper is different. Under normal circumstances, the speed of the scraper is more than ten turns of the screen blue speed. Their parts are driven by the rotation of the main motor. Rotating motion is transmitted through pulleys (or gears), belts, bearings, and the like. There is no longer a reciprocating vibration here.
The function of the lubrication system is still to lubricate the rotating bearings with oil and reduce the operating temperature of the bearings to maximize the service life of the bearings.
Each machine has a corresponding material parameter requirement. There are specific requirements for the amount of treatment, the size of the material, the moisture content of the material before dewatering, and the dewatering rate after dehydration. After the feed parameters are met, the gap between the sieve blue and the scraper has a great influence on the operation of the centrifuge. The small gap will reduce the amount of coal laid on the blue wall of the sieve, reduce the friction, facilitate the flow of materials, and reduce the clogging phenomenon of the screen basket to some extent. It is also easier for the moisture of the material to pass through the material layer, which is beneficial to dehydration. The large gap will increase the amount of coal on the blue wall of the sieve, increasing the movement resistance and is not conducive to dehydration. The centrifuge for the unloading of the spiral scraper generally requires a clearance of about 2 mm. The size of this gap can be fine-tuned by adjusting the relative position of the blade to the basket. The direction of the spiral blade on the blade is designed according to the relative position of the blade and the rotation of the screen blue. It causes the material to advance toward the discharge end along the direction of rotation of the blade spiral. Therefore, the steering of the motor can not be replaced at will, and the power must be connected according to the design rotation direction.
The vertical scraper discharge centrifugal dewatering machine is basically the same in structure as the horizontal type. The way they are arranged is different. The working principle is basically the same.