FBCDZ-10-No29 Coal Mine Exhaust Explosion-Proof Counter-Rotating Axial Flow Fan

This article's table of contents introduction:

1. Breakdown of the Model Code
2. Key Technical Features
3. Typical Performance Parameters (Estimate)
4. Common Components Included
5. Summary

This appears to be a specific model designation for a piece of heavy industrial ventilation equipment used in underground coal mining.

Here is a detailed breakdown of what the name FBCDZ-10-No29 Coal Mine Exhaust Explosion-Proof Counter-Rotating Axial Flow Fan means, based on standard Chinese mining nomenclature (MT/T and GB standards).

Breakdown of the Model Code

• F – Fan (通风机)
• B – Explosion-Proof (防爆). The motor and internal components are designed to prevent the ignition of methane (CH4) or coal dust.
• C – Counter-Rotating (对旋/抽出式). This indicates the fan has two impellers rotating in opposite directions (no stator vanes between them) to generate high pressure. The "C" often implies "extraction" (exhaust) in this context.
• DZ – Axial Flow (轴流式). Specifically, a low-noise or customized axial type.
• 10 – Motor/Design Sequence. This often relates to the motor pole pairs or a specific design iteration. In many cases, "10" corresponds to a 10-pole motor (approx. 580 RPM at 50Hz) or a specific power/speed design.
• No29 – Impeller Diameter. The fan wheel diameter is 29 dm, which equals 9 meters (9.5 feet). This is the most critical physical size dimension.

Key Technical Features

• Function: Exhaust (Extraction) . This fan is designed to pull stale, potentially explosive air (containing methane) out of the mine, creating negative pressure in the mine shaft.
• Explosion-Proof Design: The fan casing and motor are built to withstand an internal gas explosion and contain the flames, preventing it from propagating back into the mine.
• Counter-Rotating Technology:
  • Two Impellers: The fan has two sets of rotating blades on a single shaft or two separate motor shafts.
  • High Efficiency: By using a second impeller to straighten the air (without guide vanes), it converts rotational energy into useful pressure more efficiently than a single-stage fan.
  • High Pressure: It can overcome high mine resistance (up to 4000-5000 Pa typically).
  • Reversible: Unlike many fans, a counter-rotating fan can reverse flow by swapping the rotation direction of one or both impellers, allowing it to be used for auxiliary ventilation or reversing the airflow.
• Size & Application:
  • No29 (2.9m) is a large-scale main mine fan (Main Ventilator).
  • It is used for the main ventilation system of large underground coal mines, moving air volumes typically in the range of 80 to 200 m³/s (170,000 to 420,000 CFM), depending on the speed and motor power.

Typical Performance Parameters (Estimate)

Since exact specs depend on the motor and blade settings (e.g., blade angle), here are typical values for a FBCDZ-10-No29 fan:

• Rated Speed: ~580-750 RPM (depending on motor poles)
• Motor Power: Usually 2 x 250kW to 2 x 400kW (Dual motors – one for each rotor)
• Air Volume (Q): 80 – 160 m³/s (varies with blade angle)
• Static Pressure (Psf): 2000 – 5000 Pa
• Efficiency (ηs): Up to 82-85%

Common Components Included

A typical installation of this fan includes:

1. Fan Assembly: The main casing with two counter-rotating blade sets (impellers).
2. Explosion-Proof Motors: Two external (or internal, water-cooled) explosion-proof motors (e.g., YBF or YBFe series).
3. Diffuser/Evasee: A cone-shaped outlet to recover velocity pressure.
4. Bearing Monitor: Temperature sensors for real-time monitoring.
5. Silencer: To reduce noise, as these fans are very loud at full speed.
6. Electrical Control Cabinet: Soft starter or VFD (Variable Frequency Drive) for variable speed control.

Summary

Definition: A 2.9-meter diameter, explosion-proof, high-pressure exhaust fan used as the primary main ventilation fan for a large coal mine. It uses two counter-rotating impellers to move large volumes of air while handling explosive gas mixtures safely.

Would you like assistance calculating the power requirements, finding a specific datasheet for this model, or understanding how it compares to a single-stage axial fan for your application?