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Concrete ways of running rotary kiln in a good manner

6 March, 2013 at 2:57 am in Business

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Rotary kiln is the central and the most complex component of cement production process. Its task is to take an appropriate mixture of input material (“raw meal”), and to gradually burn and bake it to produce clinker, coarse-grained pieces of cement which are then transported away from the kiln and milled in a special mill to get the cement dust. The kiln itself is a complex cylindrical device, consuming fuel to get preheated to a high temperature necessary to produce clinker. Pinion installation and maintenance and the drive shaft alignment is very important. Installation, to initial positioning tooth tip clearance.

A. Determination of tooth tip clearance

The gear tooth tip clearance c = 0. 25M (where M is modulus gear). Rolling circle and supporting rolle for long-term wear and tear due to high temperature can cause the whereabouts of the rotary kiln cylinder and a large gear ring radial runout and other factors. Addendum must be necessary to increase the gap - Recommended for large rotary kiln c = 0.28M (where the ground round modulus M).

B. Installation process

(a) Find the tooth tip clearance to the initial position. Length of the bar can be slightly larger than the width of the pinion gear on the two clenched between the top of the root.Then complete the localization of small gear.Next adjust the tooth surface at both ends of the parallel degree of backlash and as you can. Simultaneous measurement of gear backlash must meet the requirements.

(b) General pinion ring gear is wider than the body width of the rotary kiln. Difference should be equal to the width of the cylinder runout. So should run up and down rotary kiln position in which it is set to wide-tooth contact position. To achieve the normal operation of the rotary kiln thermal process. Large and small gear longitudinal centerline coincide.

(c) directly to the two gear pitch circle tangent method to install. Although this approach that the large thermal expansion of the ring gear. The tire inflation would raise the kiln shell. It does not result in changes in gear meshing. The introduction of the rotary kiln is currently doing.

(d) The current small gear installed in two ways: when a small gear, gear shaft, bearing, steel base has been installed by the manufacturer together. Direct alignment with a small gear, the overall installed in place when the parts in bulk to the scene. It is required with the order after the assembly. The overall look is in place.

C. Technical requirements of rotary kiln pinion installation

(a) pinion installation design requirements should allow the expansion of a large amount of gear. And determine its pitch to meet the requirements.

(b) adjusting the determination of the size of the gear tooth tip clearance. It can be 0. 28M or o. 25M + (2 ~ 3) mm total take (M for the gear module.)

(c) meshing well, the direction of the contact surface in the tooth should not be less than 50%. In the tooth width direction of not less than 65%;

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