Reasons for using helical gears in reducers

The reason for using helical gears in gearbox manufacturing is that the main drawback of spur gears is that they generate vibration. Especially the slow drive motor and main motor, the oil pump motor and main motor of the oil station are interlocked, and other interlocks are required on the bottom device diagram.

Check and confirm that the connection points of the slow drive installation are located behind. After using the handle to connect it to the reducer, manually rotate the slow drive installation and confirm that there is no jamming or impact during operation. Only then can the slow drive motor be started for operation. Because at any instant, approximately half of the time (assuming a coincidence of approximately 1.5) there will be two teeth meshing, which brings additional benefits in terms of strength.

Check whether the foundation bolts and all connecting bolts of the entire reducer system are tightened, and whether the entire control system is complete and prepared firmly. Whether due to design, manufacturing, or deformation reasons, some changes in the involute shape may occur along the entire tooth surface at the same time. After 30 minutes of oil supply, check and confirm the connection flanges of the pipeline system, the oil pressure and temperature of the oil station, and the normal operation of all systems before starting the main motor to operate the reducer. Helical gears, unlike spur gears, can cause poor axial force. This will result in a regular, once per tooth excitation, which is often very strong. Therefore, in the manufacturing of reducers, helical gears are chosen instead of straight gears. For example, there are four major series: R series coaxial helical gear reducers, K series spiral bevel gear reducers, S series helical worm gear reducers, and F series parallel axis helical gear reducers. Manufacturing and assembling a large number of thin straight gears is both difficult and uneconomical, so it is necessary to manufacture gears that are connected as a whole and have teeth along the spiral direction. But the benefits in terms of vibration and strength far outweigh the drawbacks brought about by axial thrust and slightly increased manufacturing costs. The resulting vibration not only causes a large load on the gear, but also causes noise. Another disadvantage is that sometimes the additional strength obtained from the meshing of two pairs of teeth during contact time cannot be utilized, as the stress is limited by the condition of single tooth meshing in the cycle. The helical gear of the reducer can be seen as a cylindrical gear formed by a group of thin and misaligned gear teeth, so that the contact of each piece is at different parts of the tooth profile, resulting in the compensation of the error of each thin gear tooth. This compensation effect is very effective due to the elasticity of the gear teeth, and thus the result is that the error of the gear teeth within 10mm can be averaged. Therefore, under load conditions, It can run smoothly like a gear tooth with an error of within 1mm. Therefore, stress can be established on the basis of 1.5 times the tooth width, rather than one tooth width.

Before the planetary reducer operates, turn on the oil station heater and heat the smooth oil to 38 ℃ (pay attention to self circulation of the oil station during heating) before supplying oil to the reducer. If there is no abnormality after running for 20 minutes, it can be stopped from running. After using the handle to make it separate from the main reducer, lock the handle with a locking bolt.