The girth gear is one of the more commonly used parts in large mechanical equipment (such as rotary kiln, ball mill). Its function is to transmit and change the direction of force through the large ring gear. The large ring gear belongs to the thin-walled ring castings. In the casting process, problems such as uneven thickness, folding, and ellipse are prone to occur. Therefore, it is necessary to pay attention to the details of the casting process to improve the quality of the casting during the processing.

Due to manufacturing capabilities, transportation and installation requirements, the girth gear is composed of two half gears that are joined together by counter screws and tangentially fixed to the kiln body by spring plates. To complete the installation and alignment of the girth gear with high quality, it is necessary to develop a scientific and feasible construction plan whether it is newly installed or reset after overhaul. On the casting girth gear, CHAENG uses high-quality ZG45, ZG42CrMO and other cast steel materials, and uses a unique heat treatment technology in the casting, which optimizes the ring gear structure, improves the hardness, and greatly improves the wear resistance and impact resistance of the product. 

The girth gear is one of the key components in the rotary kiln transmission. The installation quality directly affects the stability of the rotary kiln drive system, the stability of the rotary kiln operation, the service life of the kiln lining and the rotary kiln operation rate. Therefore, CHAENG uses high-strength steel for girth gear casting during processing, and optimizes the transmission characteristics of the rotary kiln to ensure the stability of the components under long-term operation and prolong the service life of the components.

All along, Xinxiang Great Wall has been at the forefront of the industry in processing large steel castings, and has continuously met the needs of customers in service. CHAENG adheres to the concept of “exquisite design and meticulous casting”, taking into account the details of temperature, speed and material characteristics in the process of casting girth gears, so as to ensure that each girth gear can be equipped with high efficiency, durability, and user usage requirements.