Rotary kiln tyre, also known as the rolling ring, its role is to
transfer all the gravity of the cylinder body (including the
gravity of refractory bricks, internal devices and materials) to
the supporting roller, and make the cylinder can rotate smoothly on
the supporting roller, so the tyre should have enough strength and
durability. At the same time, the Tyre is to strengthen the radial
stiffness of the cylinder parts, should have enough stiffness.
classification
According to the different cross-section shapes of the rotary kiln
tyre, it can be divided into the following categories:
1. Rectangular Tyre of rotary kiln
Its section is solid rectangle, the shape is simple, the
manufacturing quality is easy to guarantee. Generally, the service
life is longer than that of the box wheel belt, and it is widely
used. But its rigidity is relatively small, the material
utilization is unreasonable, the heat dissipation condition is
poor.
2. Box Tyre of rotary kiln
Its cross section is hollow box shape, good thermal conditions,
high rigidity, reasonable material utilization is difficult. The
wheel belt and the cylinder body constitute an integral structure,
can avoid the "neck shrinkage temperature stress" between the wheel
belt and the cylinder body. And make the wheel belt give full play
to the reinforcement of the simplified body, and make the material
of the wheel belt get reasonable use, simplify the manufacturing,
installation work, easy to operate. The installation of the wheel
belt on the cylinder body usually adopts the looper type, the form
of the pad and baffle. The belt is not directly installed on the
simplified section, but installed on the cushion plate, so that a
natural ventilation channel is formed between the cylinder and the
belt. On the one hand, this strengthens the heat dissipation, and
on the other hand, reduces the heat conduction of the kiln body to
the belt, so that the temperature difference between the inner and
outer edges of the belt is small. When the thermal system in the
kiln is changed, the temperature difference does not change much,
thus reducing the temperature stress on the wheel belt. When the
kiln is running, the wheel belt and the simple body will slide
relative to each other along the axial direction, causing wear and
tear. At this time, the cushion plate plays a role in protecting
the cylinder body. On both sides of the wheel belt, the baffle or
retaining ring is used to limit the axial movement of the wheel
belt along the cylinder.
