Broken teeth of cylindrical gear reducer

Tooth breakage is a common fault in gears, and the fracture of transmission gears usually occurs on the teeth. Due to the high stress at the teeth, it is the source of stress. There are three common conditions for broken teeth:

1. Tired and broken teeth. Because the stress caused by the transmission gear root under the load effect is the alternating crustal stress of the pulsating beverage circulation system, and it will cause fatigue cracks under the composite effect of stress sources such as gear tooth arc, production and processing knife lines, and raw material defects. The cracks gradually spread and expand, ultimately causing fatigue and tooth breakage in the transmission gear.

2. Broken teeth under load. Cylindrical gear reducers are commonly used in the squeezing roll and water pump drive system of the production workshop of the paper industry, and their gears are mostly made of ductile raw materials such as pig iron or high toughness carbon steel. Because of the relatively serious load or damaged load effect, the crustal stress on the risk cross section of the gear teeth will exceed the specified value, resulting in sudden tooth fracture.

3. Partial tooth breakage. When the machining accuracy of the tooth surface is low or the installation quality of the gear is weak, touching the line along the tooth surface can cause a wheel weight condition where one end touches and the other end does not touch. The wheel load significantly expands the crustal stress at the teeth of the transmission gear that is partially touched, which exceeds the specified value and results in partial tooth breakage, which is always at the top of the transmission gear.