Here's how it works and why it's important:
1. Purpose
Prevents overheating damage to the motor, hydraulic pump, or gearbox.
Ensures safe operation for workers in tunnels, mines, and slope works.
Avoids costly repairs caused by burnt coils, seized pumps, or oil degradation.
2. How It Works
Temperature Sensors (thermocouples or thermistors) are installed in:
Hydraulic oil tank
Motor windings
Gearbox or reducer
When the temperature exceeds a set threshold (e.g., 70–85 °C for hydraulic oil, 120–150 °C for electric motors), the control system:
Triggers alarms (sound + flashing light).
Automatically stops the pump to prevent further heating.
Locks the restart until the temperature drops to a safe range.
3. Additional Features
Overheat warning display on the control panel.
Cooling system (fan, radiator, or water cooling) starts automatically when oil temperature is high.
Data logging for maintenance records, so operators can track frequent overheating issues.
4. Benefits
Longer machine lifespan.
Stable shotcrete quality (since overheating can change concrete viscosity).
Safer for operators, especially in confined spaces where fire risk is higher.
