What are the factors that cause the drum gear coupling damage?

What are the factors that cause the drum gear coupling damage?

The axial momentum of the main motor shaft is too large

The motor is supported by a sliding bearing, the factory standard rotor axial momentum is 5% of the magnetic base of the motor, and the orientation of the magnetic base is not indicated, and the axial momentum of the gear coupling is 5%, just because the axial momentum of the rotor of the main motor is greater than the axial momentum of the drum gear coupling, forming in the process of the start and stop of the main motor. The axial movement of the rotor has a great impact on the gear coupling, resulting in the damage of the gear.

Improper motor installation

Because the motor does not indicate the orientation of the magnetic base, the rotor orientation of the motor is not on the orientation of the magnetic base when the motor is in the static device, and the influence of the magnetic base of the motor is neglected during the installation process. When the motor rolls, because of the control effect of the gear coupling, the motor rotor can not be positioned under the magnetic base, which increases the impact on the gear coupling and speeds up the damage of the gear shaft

The structure and principle of the drum coupling before improvement

The connection between the motor and the coupling before the improvement is as follows: The motor and half coupling 4 cooperation part is 6mm, the length is 32mm, there is no keyway on the shaft, can not complete the key connection transfer torque, according to the installation requirements of the motor, the motor and half coupling hole choose between the transition cooperation, torque mainly depends on the two M5 set screws fixed on the half coupling transmission, in the use of the process, this structure has the following lack:

(1) Between the motor shaft and the setting screw is a linear touch, the touch surface is exceptionally small, and the transmission torque is very limited.

(2) The threaded connection does not have a loose-proof function, and through several disassembly and long-term operation, the relative rolling and axial movement of the semi-coupling shaft and the motor shaft will be formed, resulting in the equipment being unable to work.

Drum gear coupling fault factors: the bearing capacity and life of drum gear coupling depend on the touch strength, and the tooth surface curvature radius and tooth engagement Angle directly affect the touch strength of the tooth engagement Angle and radius of curvature and touch strength of the relationship between the touch stress F - the circular force accepted by the gear E - data elastic modulus - tooth surface curvature radius - displacement circle radius - engagement Angle - the tooth surface meshing high The contact stress is directly affected by the curvature radius and meshing Angle of the tooth surface. The smaller meshing Angle is the larger curvature radius, and the larger curvature radius is the smaller touch stress. The engagement Angle of the drum gear coupling in foreign countries is 20°, 21.5°, 28°, 30°. We choose 20° meshing Angle to reduce the touch stress. ① The tooth surface wear is severe.② The axial displacement of the inner tooth ring is large, and even cannot mesh.③ The scene of broken teeth.④ the coupling bolt is broken. The problems of the coupling of lifting accessories: ① the tooth surface is seriously worn. ② The axial displacement of the inner gear ring is large, and even cannot mesh. ③ The scene of broken teeth. ④ the coupling bolt is broken. The primary factor in the formation of the above description is the lack of oil or oil of the drum gear coupling of the lifting accessories. The horizontal and coaxial errors of the two axes are too large, exceeding the scale that the coupling can compensate, making the shaft teeth engage with the inner teeth inaccurate, forming part of the touch, and creating additional torque.