Precautions for operation of main components of linear vibrating screen

Linear vibrating screen is generally composed of vibrator, screen box, support or suspension device, transmission device and other parts, and is mainly used in mining, coal, smelting, building materials and other industries. The working conditions of the linear vibrating screen are relatively harsh, and various failures often occur during operation. In response to these problems, the vibrating screen manufacturer gave us the following detailed explanations on the key points of operation and maintenance of the main components of the linear vibrating screen.

1. Adjustment of the eccentric block of the exciter

1) The size of the exciting force is closely related to the movement of the screen machine. There are 8 adjustment holes between the main block and the counterweight block of the eccentric block,which are equally divided by 15°, so it can be adjusted according to 8 positions at different angles. After being adjusted to different positions, the centrifugal force changes, and the vibration amplitude of the screen machine is changed accordingly.

When adjusting, each vibrator needs to be adjusted synchronously. If the adjustment position is different, the exciting force generated is different, and the material on the screen surface will jump irregularly. Therefore, correct adjustments must be made, especially when the exciter is replaced. When using the vibrator, the position of the adjustment hole must be consistent.

2) Inspection after adjustment, it is required that the two symmetrical points on both sides of the screen have the same amplitude and direction. If there is a slight difference in the amplitude of the two sides of the screen machine, no more than 0.5mm is allowed, because the movement track of the material is related to the uniformity of the material on the screen surface, and it is necessary to adjust the distribution of the incoming material in time.

2. Coupling

The vibration exciters on both sides of the screen machine are connected by universal couplings. When replacing them, attention should be paid to the straightness of the joint surface of the universal couplings. The universal coupling has been dynamically balanced before leaving the factory, and the straightness of the coupling is directly related to the vibration amplitude of the screen machine.

When replacing, use the method of natural sagging of the eccentric block of the exciter, and then connect and fix the universal coupling with the coupling of the exciter. The difference in screw hole position is adjusted by adjusting the position of the spline. One thing to note is that the length dimension of the coupling and the length dimension of the spline should be selected reasonably to avoid insufficient coupling length or spline jamming.

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3. Rubber buffer spring

Each rubber buffer spring can be used for about 15 to 20 months, and the size varies with the model of the screen machine. The temperature of the equipment cannot exceed 45°C when it is running. When replacing the rubber spring, attention should be paid to the elastic coefficient, that is, the height of the rubber spring at the inlet of the screen machine is similar to that of the outlet, so that the buffer rubber spring can be used reasonably and not easily damaged.

Also, when replacing the rubber springs, it should be noted that the rubber springs on the front and rear parallel lines should be replaced at the same time to avoid amplitude changes due to inconsistent aging of the rubber springs.

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