The rotor is a key component crusher, so to the rational design of its structure and the various parameters. This paper describes the design of the rotor structure.
According to the actual statistics, rotor diameter D (mm) can be calculated as follows: D = 1.85Dmax +110 ...... ①, Max feed size where Dmax counterattack crusher (mm). For single-rotor impact crusher, the result of this formula ① multiplied by 2/3. The rotor length L based primarily on the size of the productivity, based on existing data L / D = 0.7 ~ 1.5, for hard materials should be selected smaller.
Rotor impact crusher by the spindle, turntable, hammer, hammer fastening devices and other components, have adopted a whole cast structure of the rotor, there is the use of thick steel plates made of steel or made of composite rotor disk, Also useful welded steel hollow rotor. Gravel crusher system are thick steel, thick-walled tubes, castings welded processed welding, soldering contact points on the material that tungsten carbide wear-resistant materials. Rotor mass should be concentrated in the outer edge, increasing the moment of inertia. Use tight rotor spindle expansion sets swelling, keyless connection, so easy disassembly, and overload protection. Rotor mass is too small, it will reduce the crushing effect; too large, it may cause difficulty in starting. The rotor may be initially calculated based on the total mass ratio of the mass of the rotor and the motor power, the total mass of the rotor set to M, the motor power is P, the ratio between the M / P ≈ 31kg/kW, whereby the value of M can be calculated according to the motor power P ; if known, the value of M, calculate motor power P value.
In strength, stiffness conditions allowed the rotor structure design should maximize the value of the rotor radius, thus have a greater quality of available kinetic energy is small, and therefore should not only pay attention to the quality of attention rotor rotor design. Crushing effect of improving and reducing the wear plate in view of the hammer, towards increasing the quality of the rotor M, the direction of reducing the speed of the rotor.
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