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Pharmaceutical Network Technical Article: Spin sieve is a high-precision fine powder screening machinery, its low noise, high efficiency, for the full yaround structure, suitable for grain, powder, mucus and other materials screening filtration, widely used in Chinese medicine, filtration and other fields According to different applications, the cyclone sieve can be divided into ordinary type, gate type and edge type
Among them, the common type cyclone sieve is mainly for ordinary powder, small particle material screening operations, gate-type rotary sieve for ultra-light, ultra-fine material screening, users can once cast long-term screening operation, through the control of the opening and closing of the gate to achieve a good sieve Point of purpose, this screening operation is mostly used in traditional Chinese medicine powder, pollen and other industries, plus-edge cyclone sieve is in the ordinary type of rotary sieve on the basis of increasing the inlet, and through special angle design to prevent liquid splashing filter ingress ingres sieve equipment, in paint, water filtration, Pulp filtration and other industries have a wide range of applications
In terms of structure, the rotary sieve is composed of sieve cover, sieve frame, motor (vibration source), vibration reed, base and so on When the vibration sieve is working, the eccentric block of different phases on and off the vibration motor produces a compound inertial force due to the centrifugal action of high-speed rotation, and the forced sieve produces a reel-type vibration, and its vibration altogether is a complex spatial three-dimensional curve The projection of this curve on the plane is circular, and the projection on both vertical faces is elliptical
For users, getting a good screening effect is a pursuit Some technical personnel pointed out that the user can adjust the vibration sieve on, the lower hammer relative position, to improve the material on the sieve trajectory, extend or shorten the material on the sieve time, in order to achieve the ideal screening effect However, many users said that they still do not know the way to adjust the spin sieve up and down the hammer, for which, the author made a brief dry goods sharing
Adjusting the additional heavy block according to the demand Can be seen by observation, the side of the hammer (upper and lower eccentric block) is fitted with additional heavy blocks, the role of which is to increase the vibration of the sieve machine Users can according to the number of layers of the screening machine, the proportion of materials are different, to increase or decrease additional heavy weight blocks, so that the screening machine to achieve a more satisfactory screening effect
Adjust the phase angle of the upper and lower sledgehammer Because the upper hammer of the cyclone sieve can not be adjusted angle, the user needs to open the bottom barrel adjustment hole, release the under-hammer fixing bolt, according to the screening material trajectory to the outlet in the opposite direction to adjust the phase angle of the upper and lower heavy hammer A small amount of material is then placed on top of the screen, the sieve machine is running, and the sieve material movement trajectory is checked, when the processing parameters have achieved good results, the fastening bolt should be stopped, so that the adjustment work is completed (remember the tight retention bolt)
Technicians say that by changing the phase angle of the upper and lower hammers, the trajectory and dwell time of the material on the screen can be changed However, in order to adapt the sieve machine to the separation state required by various materials, such as the distribution of materials, processing volume, separation efficiency, over-the-net rate and other changes, it should be adjusted to a reasonable state
In addition, it should be reminded that sometimes due to the weight of the material, humidity, stacking tilt angle and other parameters, the user can not adjust the phase angle once the success, so it is recommended that users need to have sufficient patience to adjust the equipment, so that the machine to play its due effect.