1. Visual inspection of tooth shape
The tooth shape of the rubber synchronous belt is found to be worn--
Cracked tooth root: Longitudinal cracks appear at the root of the tooth and need to be replaced immediately.
Tooth top wear: Tooth height wear exceeds 30% (the tooth becomes shorter and flatter with naked eyes) or the tooth shape is deformed.
Tooth side wear: The tooth side is worn out with a bevel or asymmetry, resulting in inaccurate meshing. Use your fingernail to gently scrape the tooth surface. If there is obvious depression or chipping, it indicates that the rubber is aging and needs to be replaced.
Rubber synchronous belt body damage--
Transverse cracks: Transverse cracks appear on the surface or back of the belt body.
Damage to the cloth layer: The surface anti-wear cloth layer falls off or tears, exposing the internal fiber line.
Edge delamination: The edge of the belt body is delaminated or burred, which may be due to improper installation or excessive tensioning.
Foreign matter embedding and contamination--
Oil stains and chemical corrosion cause the belt body to expand, become sticky or harden.
Hard objects such as metal debris are embedded in the tooth groove, causing local damage.
2. Abnormal operation status
The rubber synchronous belt emits high-frequency whistling (tooth slippage) or regular knocking sounds (tooth skipping) during operation. The vibration amplitude of the equipment increases significantly, which may be caused by uneven tension of the synchronous belt or damage to the tooth shape. The equipment has positioning deviation (such as arm offset) and speed fluctuation (such as unstable conveyor belt speed). The phase of the driving wheel and the driven wheel is not synchronized (need to be detected by a laser phase meter). The temperature of the belt body or pulley increases significantly when touched (normally it should be close to the ambient temperature), indicating that the friction increases or is overloaded. At this time, the synchronous belt needs to be replaced in time to ensure the safety of the equipment and staff.
3. Replacement signals for special scenarios
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Scenario
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Change signal
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High temperature environment
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The belt body hardens, cracks faster, and the surface is powdery
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Chemical exposure
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The belt body expands, becomes brittle or dissolves, and loses elasticity
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High dust environment
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The tooth grooves are filled with dust, resulting in meshing failure and increased wear
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Frequent start and stop/heavy load
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The belt body is partially broken and the transverse cracks at the tooth root increase
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