Vibration crushers typically use an electric motor directly connected to the crushing unit, a simple and easy-to-maintain setup. However, if the two components do not connect properly during assembly, it can cause overall vibration in the crusher.

(1) The motor rotor is not concentric with the crusher rotor. The position of the motor can be adjusted left or right, or shims can be added under the motor's base feet to align the concentricity of the two rotors.

The crusher rotor is not concentric. The cause is that the two support surfaces for the rotor shaft are not in the same plane. Copper sheet can be placed under the bottom surface of the support bearing seat, or an adjustable wedge iron can be added at the bottom of the bearing to ensure that the two shaft ends are concentric.

(3) The粉碎室experiences significant vibration. This is due to misalignment of the coupling with the rotor or uneven mass distribution of the internal flat hammer blades. Adjustments can be made to the coupling's connection with the motor based on the type of coupling used: when the hammer blade mass is uneven, reselect and match each set of hammer blades to ensure that the symmetrical blades have an error less than 5G.

The original balance has been disrupted. After motor repair, dynamic balance testing is required to ensure overall matching balance.

(5) In the case of loose foundation bolts or unstable bases in the crushing system, ensure even tightening of the foundation bolts during installation or maintenance. Between the foundation and the crusher, install shock-absorbing devices to reduce vibration.

(6) Blade breakage or the presence of hard debris in the crushing chamber can lead to unbalanced rotation of the rotor, causing the entire machine to vibrate. Therefore, regular inspections are necessary, especially for blades with severe wear. When replacing them, symmetric replacement is required; any abnormal sounds during the operation of the crushing machine should be immediately stopped for inspection, and the cause should be identified and addressed promptly.

(7) The connection between the crusher system and other equipment does not match. For instance, improper connections of feed and discharge pipes can cause vibration and noise. Therefore, these connection points should not be rigidly connected; it is recommended to use flexible connections instead.

2. Bearings Overheating - Bearings are a crucial component in crushers, directly affecting the normal operation and production efficiency of the equipment. During operation, users must pay close attention to the temperature rise of the bearings and the noise from the bearing area, and handle any abnormalities promptly.

(1) Uneven bearing supports or misalignment between the motor rotor and the crushing machine rotor can cause additional shock loads on the bearings, leading to overheating. In such cases, immediately shut down the machine to troubleshoot the issue to prevent premature bearing failure.

Excess, insufficient, or aging lubricating oil within the bearing is a primary cause of overheating and damage. Therefore, it is crucial to follow the manual's instructions for timely and proper lubricant replenishment. Generally, lubrication should occupy 70% to 80% of the bearing space; too much or too little can be detrimental to both lubrication and heat transfer, ultimately extending the bearing's service life.

(3) A tight fit between the bearing cover and the shaft can lead to overheating due to either too tight or too loose fitting of the bearing with the shaft. Once this issue occurs, during equipment operation, it will emit friction noises and noticeable swinging. The machine should be stopped, and the bearing should be removed. The friction area should be trimmed, and then reassembled according to specifications.

3. Crushing Machine Clog: A common malfunction encountered during the operation of crushing machines is the clog, which can be attributed to design issues with the machinery, but is more often due to improper usage and operation.

(1) The feeding speed is too fast, causing an increase in load and resulting in a blockage. During the feeding process, pay close attention to the deflection angle of the ammeter needle. If it exceeds the rated current, it indicates that the motor is overloaded. Prolonged overloading can damage the motor. In such cases, immediately reduce or close the feed door, or alter the feeding method by increasing the feeder to control the feeding quantity. Feeders are available in manual and automatic types, and users should choose the appropriate one based on the actual situation. Due to the high speed and large load of the crushing machine, as well as the strong fluctuation of the load, the current during the operation of the crushing machine is generally controlled at about 85% of the rated current.

(2) Inadequate or blocked discharge pipes, or excessive feed rate, can lead to clogging in the crushing machine's air inlet; improper matching with conveying equipment can cause the discharge pipe to weaken wind or completely blockage after the wind stops. After identifying the fault, the first step should be to clear and adjust the mismatched conveying equipment at the delivery port, and then adjust the feed rate to ensure the equipment operates normally.

(3) Blade breakage, aging, clogged and torn screens, and excessive moisture content in the crushed material can all lead to blockages in the crushing machine. Regularly replacing broken and severely aged blades is essential to maintain optimal machine performance. Additionally, screens should be checked regularly, and the moisture content of the crushed material should be kept below 14%. This not only improves production efficiency but also prevents blockages and enhances the reliability of the crushing machine.