Excavator Tooth Adapter 3G8354 Teeth

The impact of edge gear damage on construction machinery

The damage of edge teeth in construction machinery will cause multi-dimensional performance decline and systemic risks. The specific impacts are as follows:

1. Deterioration of transmission accuracy

The transmission ratio is inaccurate ‌

Tooth surface wear leads to thinning of tooth thickness or distortion of tooth shape, deviation of input/output speed from the design value, and expansion of material conveying positioning error to the millimeter level (such as misalignment of printing equipment).

Return trip error intensifies ‌

When the meshing clearance increases due to wear, the reverse transmission experiences idle travel, and the positioning accuracy drops from the 0.1mm grade to above the 1mm grade.

Abnormal load transfer ‌

The pitting and spalling of the tooth surface cause periodic impacts, and the fluctuation range of the output torque exceeds the design value by 20%.

Two. Breakdown of operational stability

Sharp increase in vibration ‌

The wear of the tooth top fillet leads to "top edge meshing", and the vibration velocity soars from the normal value of 2.8mm/s to 11.2mm/s (exceeding the safety threshold of ISO 10816).

Noise pollution ‌

The meshing impact sound pressure level rose from 75dB(A) to 90dB(A), masking the early fault signals of the equipment.

Iii. Loss of carrying capacity

Tooth surface strength attenuation ‌

When the pitting area exceeds 30%, the contact stress breaks through the material limit (such as the allowable value of 1500MPa for 20CrMnTi gears), inducing tooth surface cracking.

Risk of root fracture ‌

Wear and thinning of the cross-section at the tooth root, superimposed stress concentration cracks, and instantaneous overload can cause the entire tooth to break (such as when a heavy object falls from a crane).

Support shaft failure ‌

When the decarburization depth of the inner hole reaches 0.15mm, the bending fatigue strength decreases by 60%, triggering a chain reaction of planetary carrier deformation.

Four. The operation and maintenance costs have soared

Energy consumption surges ‌

Wear increases the coefficient of friction by 40%, and the decline in transmission efficiency leads to an increase in energy consumption.

Lubrication system failure ‌

Metal debris on the tooth surface contaminates the lubricating oil, accelerating the wear of the bearing rollers and the breakage of the cage.

Secondary injury spread ‌

The impact of shaft fracture causes the coupling to be flung out, the seal to fail and leak oil, polluting the environment and accelerating the wear of parts.

V. Escalation of Safety Hazards

The shear stress of the planetary carrier bolts increased by 200% when operating on a 35° slope, and the emergency braking impact load reached seven times the static load.

The breakage of the reducer shaft may cause the connecting parts to fly off, resulting in mechanical injury to the operator.

Key conclusion ‌ : The impact of edge tooth damage has a chain-like conductivity - starting from the deterioration of transmission accuracy, gradually causing mechanical vibration, load failure, and ultimately leading to system collapse and safety accidents. Comprehensive prevention and control should be carried out through material strengthening ³, regular grinding ¹, and working condition adaptation ⁷.