FBCDZ-10-No25 is a specific model designation for a type of industrial fan used in underground coal mining. Here is a breakdown of what each part of the name means:
FBCDZ
This is the core series designation, broken down as follows:
- F: Fan
- B: Explosion-proof (Bào zhà)
- C: Counter-rotating (Chéng xiàng)
- D: Motor-driven (Direct drive, usually meaning the motor is mounted inside the fan casing)
- Z: Axial flow (Zhóu liú)
In short: "Explosion-proof Counter-rotating Axial Flow Fan."
10
This indicates the number of blades on the first-stage impeller.
- Most notably, a "10" typically refers to the impeller blade count. (Note: Some manufacturers also use this number for design variations, but blade count is standard.)
No25
This indicates the fan diameter.
- No25 means the impeller diameter is 25 decimeters (2.5 meters / 2500 mm).
Detailed Interpretation of the Full Title
"FBCDZ-10-No25 Coal Mine Exhaust Explosion-Proof Counter-Rotating Axial Flow Fan"
What it is:
This is a large, high-power ventilation fan specifically designed to extract exhaust (stale, contaminated, or gas-laden air) from underground coal mines.
Key Features:
| Component | Meaning |
|---|---|
| Exhaust | This fan is designed for exhausting air out of the mine (negative pressure ventilation), as opposed to blowing fresh air in (forcing). |
| Explosion-Proof | The motor and internal components are sealed to prevent sparks from igniting methane (firedamp) or coal dust in the mine atmosphere. This is mandatory for coal mine use. |
| Counter-Rotating | The fan has two impellers rotating in opposite directions (one clockwise, one counter-clockwise) without stationary guide vanes between them. This design provides: • Higher pressure (to overcome mine resistance) • Better efficiency • Reverse airflow capability (for emergency ventilation) |
| Axial Flow | Air flows parallel to the fan's axis (straight through the fan). |
| No25 | Impeller diameter = 2.5 meters. |
Typical Specifications for an FBCDZ-10-No25:
- Airflow Range: Approximately 40 – 100 m³/s (depending on speed and pressure)
- Static Pressure Range: ~1,000 – 4,000 Pa (depending on system resistance)
- Motor Power: Usually 2 x 110 kW to 2 x 315 kW (two motors, one for each impeller)
- Voltage: Typically 380V / 660V / 1140V (mine voltages)
Where it is used:
- Main mine ventilation shafts (exhaust side)
- Underground auxiliary ventilation stations
- Tunnels and longwall faces requiring forced exhaust to remove gas and dust
Why "FBCDZ" fans are preferred in coal mines:
- Safety: Explosion-proof construction prevents ignition of methane.
- High Pressure: Counter-rotating design generates higher static pressure than single-stage fans, necessary for deep or long mines.
- Reverse Airflow: Can quickly reverse airflow direction for emergency evacuation or gas control (by reversing motor rotation).
- Efficiency: Good efficiency over a wide operating range.
Summary:
The FBCDZ-10-No25 is a 5-meter diameter, explosion-proof, counter-rotating axial fan used for exhausting air from coal mines, capable of moving large volumes of air at moderate to high pressures while meeting strict safety standards for explosive environments.
