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Common Faults in 71 Gear Reducer Motors: Severe Heating in the Reducer
Release date:
2024-09-10
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Insufficient or excessive lubricant
If the oil level is below the lower mark on the dipstick, dry friction occurs between the gear surfaces, causing the temperature to rise rapidly. Conversely, if the oil level is too high, it can lead to excessive churning at high speeds, also generating significant heat. After shutting down the equipment, check the oil level—top up or drain oil as needed until it reaches the midpoint of the sight glass—and ensure the lubricant grade meets the manufacturer’s specifications (typically VG 220–320). -
Oil product aging or water ingress
The oil has turned black, become emulsified, and contains metal particles, leading to reduced lubrication performance and an increased coefficient of friction. Immediately drain the oil, clean the inner walls of the reservoir, replace the oil with fresh lubricant, and simultaneously swap out the breather cap to prevent further water ingress. -
Long-term Overloading
The actual load torque exceeds the reducer's rated value, causing the input current to remain persistently high and the housing to become dangerously hot to the touch. Re-evaluate the operating conditions: If the output torque surpasses the sample's rated value, you must either reduce the load or upgrade to a larger model. Alternatively, if there are significant instantaneous shocks, consider installing a hydraulic coupling or opting for a variable-frequency soft-start system. -
Environmental temperature is too high, or heat dissipation is poor.
The equipment is installed near a heat source and in a ventilation dead zone, with no air circulation on the enclosure surface. To address this, install an exhaust fan and an air duct cover to reduce the ambient temperature below 40°C. If necessary, add cooling fins to the enclosure or connect an external cooling coil for enhanced heat dissipation. -
Bearing damage or gear galling
Cracked bearing cages, burned raceways, or adhesive scoring on gear surfaces can all cause a sharp increase in temperature at the friction interface. When shutting down and listening: high-frequency squealing usually indicates a bearing failure, while low-frequency, muffled knocking often points to gear adhesion. After disassembling and inspecting, replace any damaged components and ensure the lubrication system isn’t blocked.
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