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The failure analysis and repair of impact crushers

Impact crushers can also be known as mobile impact crushers, are widely employed in building material marketplace, chemical business, coal mine and coke business for coarse intermediate and fine crushing of the brittle materials together with much less than intermediate hardness. Impact crushers features are high crushing rates, high output, low energy consumption, and also grains of their products.

PF impact crushers developed by YIFAN is able to crushing the mineral deposits and stones with breaking power as much as 320 MPa, featuring with higher processing capability and finer discharging particles. The crushed merchandise are in rectangle-shaped shape with reduced flakes and no internal cracks. Therefore, this type of impact crushers equipment is preferable to become selected as the facilities for crushing superb stone materials utilised for highways and within the regions of water conservancy, airport and civil construction of high-rise buildings.

PF Impact crushers is the most widely used crusher except jaw crusher. Deeply welcomed by customers for its excellent performance and simple operation. Now we discussion the failure analysis and repair of impact crushers.

There is a failure impact crushers, after collapse of the seriously damage crusher we found:
[1]、The impact crushers bolt of the incoming lining board bolt are all cut off,  the liner fall off, the flat head wedge bolt fault.
[2]、The impact crushers rotor is casting, the surface is very rough and the contact surface of each other is for contacts or line contact. The flat head bolts contact the wedge is also have rough surface, have bad contact.
[3]、The impact crushers flat head bolts contacted rotor is for M12, but the hole of rotor is for 23 or 25.
[4]、The impact crushers flat head bolts for positioning have rough surface, and the gap is too large, can't positioning.

The improve repair measures of impact crushers:After in view of the above analysis, the key to repair the impact crushers is prosition, so we can take the following measures:
[1]、Milling the rotor surfaces of the impact crushers, improve the surface quality, in order to ensure the good contacts.
[2]、Processing the impact crushers convex and concave set in the surface of the rotor in order to have the function of positioning, avoid shift under the action of centrifugal force
[3]、The impact crushers contacting bolts we should choose the type of M20, in order to guarantee the conjunction.

Zhengzhou YiFan Machinery Co.,Ltd(the share-holder is Shande Technology (Beijing) Co., Ltd) has its headquarter in Beijing. It is a famous manufacturer of crushing and screening equipment and provides series stone crusher and crushing plants equipment for customers, which includes hydraulic cone crusher, jaw crusher, impact crushers, vertical shaft impact crushers,vibrating screen and mobile crushing plant. We offer not only products with good quality and competitive price, but also top service and solution.
Thank you for your interest in YiFan. Please use any of the methods below to get in touch with us.
Add: The Middle of Zhengyuan Road, Xingyang Eastern Development Zone.
zip:450100
E-mail：yifanseo@yfmac.com
MSN On line: yifancrusher@yahoo.cn
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Tel: +86-371-64628852 Fax: +86-371-64628872
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