Assembly of planetary gear transmission

Planetary gear transmission is an advanced gear transmission device. Compared with fixed shaft gear transmission device, it has the advantages of large transmission ratio, small volume, light weight, less material consumption, coaxial input and output shafts, etc. For this reason, planetary gear transmission has been widely used in many machinery, such as turbine compressor, various cranes, etc.

In planetary gear transmission, there are generally two or more planetary gears engaged in meshing, so that the load distribution among the planetary gears involved in power transmission is uniform, which is the basic problem in all kinds of planetary gear transmission. Therefore, in addition to the general process requirements, attention should be paid to improving and checking the meshing quality between the gears, so that the load of the planetary gears can be as much as possible The distribution is even, so as to ensure its smooth operation and service life. For this reason, some measures are often taken to improve the meshing quality in manufacturing units.

(1) To control the radial runout and tooth thickness tolerance of each gear ring, some units choose to assemble for this purpose.

(2) Directional assembly is used to make some errors cancel each other during assembly.

(3) Pay attention to ensure the coaxiality of the body, inner ring gear, end cover, driving and driven shafts.

Due to this situation, when installing planetary transmission on site, if disassembling and assembling is to be carried out, attention shall be paid to the above situation. For planetary transmission adopting directional assembling, marks shall be made on the corresponding meshing teeth during disassembling to avoid reducing the original meshing quality after disassembling the device.

After the planetary gear is assembled, each part shall rotate flexibly, and the meshing condition of each tooth surface can be checked by coloring method, and the contact accuracy shall meet the technical requirements. During no-load test run, the sound shall be stable without impact or special sound.