Application summary of planetary reducer in mining machinery

In order to meet the rapid growth of my country's coal demand, the power of coal mining equipment has doubled, and users have higher and higher requirements for mechanical transmission.The traditional fixed shaft transmission structure has been unable to meet the existing work requirements.Planetary reducers are used in coal mining machinery.
The planetary gear transmission of the planetary reducer has the characteristics of power splitting.The center wheels can form a coaxial linear transmission, and the internal meshing gear pair is reasonably applied, and has the advantages of light weight, small size, compact structure, and strong bearing capacity.In addition, the symmetry of the planetary gear transmission structure balances the reaction force acting on the center wheel and the bearing of the rotating arm, which is conducive to improving the transmission efficiency; multiple planetary gears with the same structure are evenly distributed around the center wheel, so that the planetary gear and the rotating arm The inertial forces of the arms balance each other, increasing the number of meshing gears, the planetary transmission can run smoothly, the ability to resist shock and vibration is enhanced, and the work reliability is higher; by choosing the appropriate planetary gear transmission type and gear matching scheme, less gears can be used The gear gets a larger transmission ratio.
The structural performance analysis of the planetary reducer is as follows:
The output bearings are distributed at both ends of the output shaft, which maximizes the distance between the bearings * * * and maximizes the radial force * * *.The bearing series are self-aligning roller bearings, which not only meet the carrying capacity, but also realize the compensation of processing and installation errors; the output mode adopts internal spline output, which meets the maximum radial force output by the drive shaft reducer; in order to improve work efficiency, Mechanical friction should be avoided as much as possible.Bearings are installed in front of the intermediate sun gears at all levels to prevent mechanical friction between the planetary carriers, reduce noise and temperature rise; the planetary carriers and intermediate sun gears are connected by splines to ensure sufficient torque transmission.The connection with the middle sun gear enhances the axial positioning of the pin shaft and prevents the overall axial series movement of the planet carrier caused by the uneven centrifugal force when the reducer is running at high speed.
In order to make the design of the planetary reducer more reasonable and the performance better, the gear material is made of low-carbon alloy steel.The precision grade of the external gear can reach grade 6, and the tooth surface is carburized to maintain toughness and improve the hardness of the tooth surface.