What Are the Key Factors Affecting Sand-Making Machine Vibration?

The rotor is the core component of the impact sand-making machine. If the rotor vibrates for any reason, it may cause vibration throughout the entire equipment. Therefore, we first introduce the causes of rotor vibration.

1. Misalignment between the motor shaft and the rotor shaft

The solution is to realign the components. After inspecting the installation, ensure that the motor shaft and the rotor shaft are concentric.

2. Damaged rotor bearing

If the bearing clearance exceeds the allowable limit or if the bearing is damaged, it will result in severe rotor vibration. The solution is to replace the bearing with a new one. During operation, regular inspections should be conducted to determine whether the bearing needs replacement, thereby avoiding production delays.

3. Rotor Imbalance

Imbalance in other rotor components can lead to overall rotor imbalance and subsequent vibration, necessitating careful inspection and separate adjustment of the rotor balance. For instance, when rotating hammers are used, all hammers within the crusher must be rotated simultaneously to prevent rotor weight imbalance. Failure to do so will result in severe vibration during operation. During installation, ensure that the weight difference between corresponding hammer groups does not exceed 5g.

4. Material Blockage

If material blockage occurs, it should be cleared promptly. To prevent vibration caused by blockages, strictly control feeding specifications and ensure that unbreakable foreign objects or oversized particles do not enter the crusher. High moisture content in the feed can cause materials to stick inside the crusher, gradually forming large clumps that adhere to the inner walls. If not cleaned in time, this leads to blockages; therefore, monitor the moisture content of the feed closely.

In addition, the following factors can also cause abnormal vibration in sand-making machines

1. Unstable foundation or loose anchor bolts

When abnormal vibration occurs in a sand-making machine, first check whether it is caused by issues with the foundation or anchor bolts. If the foundation is unstable or the anchor bolts are loose, the stability of the machine will be compromised. In such cases, inspect and tighten the bolts immediately. During future operation, regularly check for looseness in the foundation or bolts and reinforce them promptly if necessary.

2. Excessive feed volume or oversized material

If the feed volume exceeds the load capacity of the sand-making machine, the machine will not be able to crush materials in the crushing chamber in time. This leads to material accumulation within the chamber, causing abnormal vibration. Adjust the feed volume promptly to ensure uniform and continuous feeding.

Oversized material particles can also trigger abnormal vibration. Therefore, verify that the feed size meets operational requirements and remove any materials with abnormal particle sizes in a timely manner.

3. Spindle Bending Deformation

Bending deformation of the sand-making machine’s main shaft can also trigger abnormal vibrations. In such cases, timely replacement or correction of the spindle is required.

4. Wear of Wear Parts

When the wear-resistant blocks of the sand-making machine are worn, the crushing process may become obstructed, leading to abnormal vibration. Therefore, regular inspections are essential, and any worn parts should be repaired or replaced promptly.

Abnormal vibration is not only a common issue in sand-making machines but also frequently occurs in other crushing equipment. During troubleshooting, careful inspection is crucial, particularly for vibrations caused by worn or detached internal consumables.