Monday, August 6, 2012

Operation and maintenance of the hammer crusher

Hammer crusher is applied to crushing medium hard and weak corrosive materials as jaw crusher. Hammer crusher crushes materials mainly by the shock effect to the materials.  The broken materials obtain kinetic energy from the hammer, and then run toward the baffles, sieve article. At the same time, materials impact each other, and been repeatedly broken, some of the materials discharged from the gap of the sieve article, and some bigger materials will be impacted, grinded again by the hammer, and become the products with required granularity.Disadvantages of the hammer crusher: The hammer and the sieve article wear easily, especially crushing hard materials. When crushing sticky materials, the sieve article will be stocked by the materials, and will cause downtime. So the moisture of the material should not exceed 15%.
The hammer crusher is a simple machine to operate. It has a simple ON/OFF operation and reset feature in the event that the latch is opened while running or thermal overloads trip. However, as with all machines there are other things to consider before operating.
The inside of the machine is free of paint in order to prevent ongoing contamination of samples. However, there is a light coating of rust preventative present. Initial samples will wear this coating off and leave a bare metal surface that will not affect your sample.
Refer to you lab policies on the number of discard samples that should be run before using the machine for test readings.
Hammer crusher crushes the materials through the high speed rotating hammer. Then the installment of basic and rotating axial must be horizontal, the length ways error is less than 0.5/1000mm, the axial error is less than 0.1/1000mm;
Hammer crusher crushes the materials through the high speed rotating hammer. Then the installment of basic and rotating axial must be horizontal, the lengthways error is less than 0.5/1000mm, the axial error is less than 0.1/1000mm;
Crushers for fine and medium crushing are designed with reverse operation of the rotor and hammers. The design of the inlet chamber, rotor with staggered hammers and smooth grate surface have a favorable influence on thecrusher capacity. The design of the crusher housing (its tipping part) allows simple and quick access to important parts of the crusher for maintenance.The impact crusher can be rearranged either in a closed path or in an open path. The machine can be supplied with a common base frame for the crusher and drive which shortens the installation time of the crusher. The frame can be supplied with a flexible seating to reduce the dynamic forces on the foundations.

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