What should I do if the vibrating screen is too noisy?

In daily production, noise is inevitable, but too much noise will have an adverse effect on the body of the staff. For this reason, the following measures can be taken to reduce the noise of the vibrating screen:

1. Choose bearings with a higher degree of housing

The vibration produced by the bearing during operation includes two aspects:

One is the structure: the rolling elements cause a slight change in the position of the axis through the compound action, which causes vibration;

The second aspect is manufacturing: the geometric errors of rolling elements, inner and outer rings, cages, etc. after rolling will cause vibration.

Load, speed, lubrication and working clearance will all affect the vibration of the bearing to varying degrees. Therefore, when selecting the bearing, the first thing to do is to meet the conditions of the bearing life, and secondly, it is necessary to use the smaller size and higher box as much as possible. Bearing.

2. Polyurethane screens replace metal screens

Because polyurethane material has small elastic modulus and large internal resistance, switching to polyurethane screen can effectively reduce noise. According to a French document, as far as the screen itself is concerned, the noise of the polyurethane screen can be 15-20dB(A) lower than that of the ordinary metal screen under the same excitation conditions. However, since the noise of the side panels and other components has not yet been reduced, in actual use, the overall noise of the vibrating screen can be reduced by 5dB(A).

3. Add constrained damping layer to the side plate of the screen box

The side plate and rear end plate of the screen box are all made of thin plates by welding or riveting. These large-area thin plates will radiate strong noise under the action of excitation force. The vibration speed is proportional to the square of it. For this reason, constrained damping materials can be applied to the board surface to achieve the purpose of noise reduction.

4. Use flexible spoke gears instead

In the vibration process, gear noise is also a noise source that is worthy of attention due to the meshing of gears. Synchronous gears used in general vibrating screens themselves work in a strong vibration environment. Because of the greater impact of biting and biting, the impact noise is also higher. Due to the large internal resistance and elastic deformation of rubber, it can not only reduce the impact of biting and biting, but also absorb more vibration energy, so flexible spoke gears can be used to achieve the purpose of noise reduction.

5. Use rubber springs instead

During the vibration, relative sliding occurs between the end of the spring and the support. Because it is dry friction, the frequency of friction noise is high and the sound is loud, so that the local noise at the position of the vibrating screen spring is significantly increased. After the rubber spring is used, part of the noise can be significantly reduced.

6. chute with rubber liner

The vibrating screen has an inlet chute and a discharge chute. The chute is welded with steel plates. The collision and friction of the material in the chute will also affect the noise of the vibrating screen. For this reason, rubber is laid on the inner wall of the inlet and the discharge chute. The liner can also reduce the noise of the chute.

summary:

In addition, the fasteners of the vibrating screen should be checked regularly to avoid additional vibration due to the loosening of individual components, and the vibrating screen equipment should be maintained and repaired.