1. Mechanical Performance Deterioration
1. Increased Wear of Moving Parts
Unlubricated screws, bearings, and other components can generate metal debris due to dry friction, leading to jamming or unusual noises during telescopic movement, and in severe cases, complete locking.
Increased clearance (exceeding 0.2mm) between the guide rails or spline pairs can cause mast wobble and affect positioning accuracy.
2. Decreased Structural Strength
Rusted metal connectors (such as flanges and bolts) can reduce tensile strength by over 30%, and in extreme cases, may even break.
Prolonged overload and unmaintained use of an unmaintained mast increases the risk of metal fatigue and can lead to permanent bending and deformation.
2. Electrical and Sealing System Failure
1. Electrical Safety Hazards
Failure to replace worn motor carbon brushes can cause sparks or overheating, potentially causing a short circuit (immediate attention is required if the insulation resistance falls below 0.5MΩ).
Dust accumulation on components within the control box can cause malfunctions, such as loss of automatic lifting control. 2. Seal Failure
A damaged dust boot allows dust to enter the telescopic joint, accelerating internal wear and causing grease loss of up to 50%.
Rust in humid environments can spread from the inside, causing mast sections to become stuck and unable to separate.
3. Reduced Environmental Adaptability
Corrosive environments (such as coastal areas and chemical plants): Metal parts not coated with rust preventative oil will develop visible rust within 3-6 months, shortening their lifespan by 40%.
High and Low Temperature Environments: Plastic seals become brittle and may break directly below -20°C.
4. Typical Failure Cases
Vehicle-mounted communication mast: Due to a failure to inspect the locking mechanism, the mast broke in strong winds, damaging a vehicle.
Rescue telescopic mast: A damaged dust boot caused mud and sand to become stuck, delaying rescue efforts.
Maintenance Recommendations
Immediately deactivate the mast: If deformation, unusual noises, or electrical anomalies are detected, the mast should be discontinued.
Preventative Measures: Lubricate moving parts quarterly and inspect seals monthly.
