Grate

Abstract

A chain grate machine, especially the driver and tension unit of chain grate machine, is disclosed. Its drive wheel is arranged at the ordinary-temp feeding end of grate bed, so running in ordinary-temp region. Its tension unit using weight for vertical tension is arranged at the high-temp discharge end. Its advantages are high reliability, long service life and low cost.

Description

Technical field [0001] The invention relates to metallurgical heat transfer equipment, in particular to a driving and tensioning device for a grate machine. Background technique [0002] During the production of pellets, the raw balls are distributed into the tail of the grate machine, transported to the head and unloaded into the rotary kiln for further roasting. The raw balls enter the high temperature gas at 1000°C-1100°C from the head of the grate machine through the rotary kiln for reverse drying, Dehydration and preheating, heat the green balls from room temperature to 800°C-850°C. The well-known general grate machine is driven by the head (unloading place), and the tail (feeding place) is tensioned, that is, the tight side of the transport chain is on the upper part, and the lower return is the loose side, so as to ensure the smooth operation of the grate bed surface supporting the material . But the head is the drive sprocket and the chain mesh, the head wheel bear...

AI Technical Summary

Problems solved by technology

If the drive shaft adopts hollow water-cooled or air-cooled shaft, the sprocket is made of high heat-resistant alloy steel, and the drive motor and reducer are equipped with heat insulation and cooling settings, etc., the investment and consumption costs will also increase accordingly.

However, in the harsh high-temperature environment, the strength of the material attenuates sharply under high temperature, and the hidden dangers of accidents increase. It is inevitable to stop for maintenance and stop the temperature

[0003] In addition, due to the increase in temperature of the running chain, especially the increase in pitch, the chain elongates, which not only affects the meshing, but also causes the running chain to stagnate and overlap the chain at the lower part of the nose reversing wheel.

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