Started in 1980s, Zhengzhou Unique Industrial Equipment Co., Ltd (Unique Group) is already a famous manufacturer & developer of mining equipment like stone crushing & screening equipment and ore processing equipment in China. Our products scope mainly includes cone crusher, jaw crusher, impact crusher, sand making machine, vibrating screen, vibrating feeder, belt conveyor, stationary & mobile stone crushing plant, ball mill, magnetic separator and cement production line etc.

What should I do if the vibrating screen has a small amplitude and low screening efficiency? How to adjust the amplitude?

2021-11-08 17:44:37

What should I do if the vibrating screen has a small amplitude and low screening efficiency? How to adjust the amplitude?

Amplitude is an important factor that affects the screening efficiency of the vibrating screen. Users can control the speed of screening by adjusting the vibrating screen amplitude. How to adjust? What should I do if the amplitude is small, and what caused it?

1. Insufficient power supply voltage

The vibrating screen is designed according to 380V three-phase electricity. If the line is not connected according to the regulations, the voltage is insufficient, which will cause the vibrating screen to have a small amplitude.

2. Too few eccentric block

By increasing or decreasing the number of eccentric blocks and controlling the amplitude, you can try to increase the number of eccentric blocks to increase the amplitude.

3. The included angle of the eccentric block is too small

If the vibrating screen is equipped with a vibrating motor, the angle between the eccentric blocks at both ends of the motor shaft will also affect the amplitude. The angle becomes smaller, the exciting force becomes larger, and the amplitude becomes larger. Otherwise, the amplitude becomes smaller, so you can change the angle by changing the angle to adjust the amplitude.

4. Large feed volume and large accumulation

If the stone material transported to the screen surface at one time exceeds its bearing range, the remaining material or accumulation in the screen surface and under-screen hopper will be too much, which will increase the equipment load and affect the amplitude. At this time, it is necessary to stop the machine first, reduce the material on the screen to the normal range, and then start. In addition, the particle size of the material is directly related to the calculation result of the vibrating screen amplitude

5. Unreasonable spring design

We know that the vibrating screen is mainly composed of vibrators, screen boxes, supporting devices, transmission devices, etc. The spring is an important part of the supporting device, so when designing the spring, the net variable of the spring should be smaller than the height of the device, otherwise, it will The vibrating screen’s amplitude is too small; however, if the net variable of the spring is too large, it may cause the body to separate from the spring.

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