Vibrating feeder is to use the eccentric block in the vibrator to rotate to generate centrifugal force, so that the movable parts such as the screen box and vibrator make forced continuous circle or approximate circle movement. The material is continuously thrown on the inclined screen surface with the screening box, and the material is continuously and evenly sent to the receiving port.
When the floor plate moves forward together with the material, the material in the silo fills the space in the body. When the bottom plate moves backwards, the material on the bottom plate cannot be returned and is blocked from being discharged to achieve feeding. The amount of feed can be adjusted by changing the amplitude and frequency of the floor movement and the height of the discharge gate. The feeding capacity is generally within 40 tons/h. This type of feeder is suitable for medium and small particle size materials, mainly trough type and pendulum type. The bottom plate of the trough feeder is flat, and it reciprocates when working. The bottom plate of the pendulum feeder is arc-shaped, hinged on the body, and the bottom plate swings when working.
The feeder consists of rotating discs, guide sleeves and scrapers. The material in the silo is stacked on a disc lined with wear liner by means of a guide sleeve, the disc rotates, and the material is scraped out by the scraper for feeding. Adjusting the scraper position or the level of the guide sleeve can change the feed volume. The diameter of the disc is generally less than 3 meters, and the speed does not exceed 10 rpm. The disc feeder runs smoothly and reliably, it is convenient to adjust the feeding volume, and the energy consumption is less, but the structure is relatively bulky, which is suitable for powdery materials with less viscosity.
Some feeders are composed of casing and impeller. The inlet and outlet ports at the upper and lower ends of the casing are connected with the silo and the receiving equipment respectively. When the impeller rotates around the horizontal axis, the material falls between the chambers of the impeller, rotates with the impeller for half a cycle, and then unloads into the receiving equipment. The equalizing pressure pipe can discharge high pressure from the cavity before entering the material area, so as not to fail to feed when it reaches the material area. Changing the impeller speed can adjust the feed volume. The diameter of the impeller is generally below 500 mm, and the speed does not exceed 45 rpm. This kind of feeder structure is relatively simple, small external size, light weight, good airtightness when feeding, suitable for small particle size and powdery materials.
