Rotary Kiln Large Gear Ring Installation and Alignment: Key Points to Note: (1) Before installing and aligning the large gear ring of the rotary kiln, the cylinder centerline 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 is a critical step. It must be of high quality, standards, and strict requirements. The alignment during the installation process is merely "centering" and cannot correct the gear ring. The pre-installed large gear ring must be lifted and installed as a whole; otherwise, it will be difficult to install and tighten the pin and bolt at the gear ring mating point, and it cannot ensure the gear pitch error and gear ring roundness tolerance. (4) The spring plate and cylinder must fit tightly in a free state without forcing them to be fixed or riveted together. Otherwise, after releasing the helical cap and wire, the radial and end face跳动 of the large gear ring of the rotary kiln will increase or exceed the tolerance under the action of the spring plate. (5) The radial and end face跳动 values during precise alignment must be less than the standard values. After removing the helical cap and wire, the radial and end face跳动 of the large gear ring of the rotary kiln may increase, but the difference will not exceed the tolerance. (6) When drilling holes for the spring plate and cylinder, follow the sequence in the drawing, and tighten one locating bolt for each hole. (7) After the large repair of the rotary kiln is delivered for production operation for 12-24 hours, stop the kiln to check the rivet condition of the spring plate and re-tighten the bolts for the large gear ring mating.