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1. Deterioration of transmission accuracy and abnormal vibration The deformation of the planet carrier (especially the hidden deformation caused by long-term self-weight or heavy load) will change the relative position of the planet pin, directly causing the instantaneous center distance between the planet gear, sun gear, and internal ring gear to change. This spatial unevenness will cause the meshing state of the gear teeth to deteriorate: the meshing backlash at some locations approaches zero or even interferes, while the backlash on the opposite side increases sharply. This will cause the instantaneous stiffness of the transmission chain to fluctuate violently, which is especially obvious under low-speed conditions, resulting in continuous abnormal shaking and knocking of the reducer. 2. Serious imbalance of load distribution and accelerated wear. The deformation of the planet carrier (including torsion and bending deformation) will break the theoretical uniform load design. The deviation in the position of each planet pin hole will cause a serious imbalance in the proportion of loads borne by different planet wheels. A planetary wheel that carries too much weight will increase tooth surface wear and even cause tooth breakage; while a planetary wheel that carries too little weight may cause idling vibration. Read More

1. The transmission accuracy decreases and the coaxiality deviation will cause the gear meshing position to deviate from the theoretical center, increase the gear backlash, and cause the return clearance to exceed the standard. In applications that require frequent forward and reverse rotation or precise positioning, this will directly lead to inaccurate positioning and delayed response, seriously affecting transmission accuracy. 2. The deviation of mechanical efficiency reduction will cause uneven force on the gears, and the instantaneous transmission ratio will change during the transmission process, resulting in periodic fluctuations in output speed and torque. At the same time, the gear meshing surface has poor contact and changes from ideal line contact to point contact or partial contact. The contact stress increases sharply and sliding friction increases, resulting in a decrease in mechanical efficiency. 3. Increased vibration and noise. Due to the sudden change in center distance, the gears will generate impact loads when entering and exiting mesh, causing harsh noises. This vibration and noise will be transmitted to the box through the shaft and bearings, causing vibration of the entire machine. If the vibration frequency coincides with the natural frequency of the reducer or equipment, resonance may occur, further Read More

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The spline shaft of the ZLY280‑16‑1 hard tooth surface gear reducer is a key torque transmission component. Most of the failure problems are concentrated in three categories: tooth surface wear, spline fracture, and plastic deformation of the shaft body. The various fault phenomena and inducing factors are explained below. 1. Spline tooth surface wear Tooth surface wear is the most common failure mode of spline shafts. Fault phenomenon: The flanks of the spline teeth are gradually worn and thinned, the matching gap between the spline shaft, the matching gear, and the connecting sleeve continues to increase, and the transmission matching accuracy decreases. Failure causes: Poor lubrication conditions: insufficient lubricant supply, mismatched lubricant grades, or oil mixed with metal particles and other impurities, causing dry friction and abrasive wear on the tooth surface. Working condition load impact: The equipment continues to bear vibration and impact loads during operation, which intensifies the relative friction loss between the spline meshing surfaces. Assembly coordination defects: The side clearance of the spline assembly is too large, which causes impact during torque transmission and accelerates the tooth surface wear process. 2. Spline breakage Read More