The exciter of circular vibrating screen has the common type of eccentric and cox exciter. The eccentric exciter of circular vibrating screen has easy installation and adjustment, higher price, and nonadjustable eccentric distance. The relative location of box exciter is alary eccentric block with adjustable exciting force and adjustable amplitude.

The working of exciter is eccentric block bending eccentric spindle with centrifugal force. And then the outer ring will have a deflection and make vibrating screen move. The inertia force in working will make bearing have an opposite function and this will break the stable operation of bearing and other spare parts. Practice shows that the same condition of vibrating frequency and screen box flexibility will cause screen box have violent vibration. The vibrating system of vibrating bearing parts and eccentric system is called free single system. The main spindle and movable spindle is called resonance system.

Exciter is the major parts of circular vibrating screen. The quality of exciter will determine vibrating service life directly. The design structure of exciter is eccentric tube exciter lubricated by lubrication oil and sealed with felt ring. The advantages of exciter are as follows:

1. Direct connecting of tyre coupling, easy structure, and convenient assembling.

2. Eccentric structure and adjustable exciting force.

3. Connecting tube with machine two-side and higher machine strength.

4. Felt ring sealing way, better sealing performance.

Circular movement of circular vibrating screen is a multi-level and high efficient vibrating screen. The structure of vibrating screen is with tube eccentric exciter and adjusting amplitude with eccentric block, lining material screen, multi-type screen. The character of vibrating screen has reliable structure, strong exciting force, high screening efficiency, low vibrating noise, endurable and strong feature, easy maintenance, and safe using. Also vibrating screen can be used in the material grading in mining, building material, transportation, energy, and chemical industries.

YKZ circular vibrating screen plays a major role in coal gradation. Also there are some disadvantages and advantages in operation, however, with the upgrading of exciter technology, vibrating screen has a reliable and stable operation, full advantage expending, and higher competitive force.