Large steel foundries recommend that you replace the ball mill gear ring in this way

/in /by

The gear ring is a component required in many mechanical equipment. It will directly drive the entire equipment to operate. During operation, sometimes a new ball mill gear ring needs to be replaced due to other conditions, which is prone to tolerance jump. So, what are the steps for replacing the gear ring and the reasons for the jump tolerance?

1. Steps for replacing the ball mill gear ring:

(1) The old gear ring will be knocked out of the flywheel body at multiple points with a brass rod in a cold state and removed. Before assembling the new gear ring, try to chamfer the teeth one by one with a file to facilitate meshing and reduce damage.

(2) The gear ring and the flywheel are hot-pressed, with an interference fit of 0.25-0.64mm. During assembly, the gear ring is heated with a blowtorch or welding gun, generally at 300-400°C, and is heat-fitted on the edge of the processed flywheel. Then hammer it in with a hammer or press it down with a hydraulic press. In order to prevent the large gear ring from loosening, the large steel foundry drilled holes every 1200 places and inserted steel pins to fix it.
(3) After the large gear ring is firmly assembled, the chamfer of the wheel teeth needs to be polished. Pay attention to improving the assembly so that the chamfered surface of the ball mill large gear ring faces the crankshaft mounting surface. Drilled 200 holes and fixed with steel nails.

2. Summary of the reasons for the tolerance runout of the large gear ring in the large steel foundry:
(1) The quality of the raw materials used in making the gear ring is very poor.
(2) When the gear ring is used as the workpiece spindle on the machine tool, its rotation accuracy is very low.
(3) When the gear ring is used, the gear ring installed on the tool holder is not positioned well.

If you have a large gear ring processing demand, you can consult us at any time. The large steel foundry will tailor the large gear ring for you according to the drawing!

Precautions and tips for installing the new environmentally friendly rotary kiln large gear ring

/in /by

Among all the parts of the rotary kiln, the large gear ring is one of the main parts of the rotary kiln equipment. Since the large gear ring is mounted on the rotary kiln cylinder and drives the operation of the entire cylinder during operation, the installation method is directly related to the use effect and production efficiency of the equipment. So what problems should be paid attention to when installing the large gear ring?
Due to the needs of manufacturing capacity, transportation and installation, the large gear ring is composed of two half gears, connected together with matching screws, and fixed tangentially on the kiln body through a spring plate. Therefore, in order to complete the installation and alignment of the large gear ring with high quality, a scientific and feasible construction plan must be formulated whether it is a new installation or a reset installation after overhaul. The correct installation process is not only responsible for your own safety, but also effectively extends the service life of the rotary kiln.

Installation precautions

1. Before installing and aligning the large gear ring, the center line of the cylinder at the riveted spring plate must be adjusted to the correct position.

2. During the installation and alignment of the large gear ring, the pre-installation of the gear ring is a very critical link. The pre-installation must be of high quality, high standards and strict requirements. The alignment of the gear ring and the cylinder during installation is only “centering” and cannot correct the gear ring.

3. The pre-installed large gear ring must be hoisted as a whole, otherwise the pins and bolts at the gear ring are difficult to install and tighten, and the pitch error at the interface and the roundness tolerance of the gear ring cannot be guaranteed.

4. The spring plate and the cylinder must fit tightly in a free state. The spring plate and the cylinder must not be fixed or riveted forcibly. Otherwise, after loosening the spiral top and drawing the wire, the radial and end face runout of the gear ring will increase or the error will exceed the standard under the action of the spring plate.

5. The radial and end face runout values ​​during fine alignment must be less than the standard values. After removing the spiral top and drawing, the radial and end face runout of the gear ring may increase, but the difference will not exceed the standard.6. When drilling the spring plate and the cylinder, proceed in sequence, and tighten a positioning bolt for each hole drilled.

7. After the rotary kiln is delivered for overhaul and put into production for 12h to 24h, the kiln should be stopped to check the rivets of the spring plate and tighten the screws of the large gear ring for a second time.