FBCDZ-10-No22 Coal Mine Exhaust Explosion-Proof Counter-Rotating Axial Flow Fan

This article's table of contents introduction:

1. Breakdown of the Model: FBCDZ-10-No22
2. Complete Meaning of "FBCDZ-10-No22"
3. Key Features & Application
4. Typical Specifications for this Model (Approximate)
5. Applications
6. Key Advantages of this Design
7. Important Note for Compliance:

This is a model specification for a specialized industrial fan used in underground coal mining. Here is a detailed breakdown of what each part of the name FBCDZ-10-No22 means, along with the context of its application.

Breakdown of the Model: FBCDZ-10-No22

The naming convention follows the Chinese standard for mining fans (MT/T 754-2005).

1. F = Fan
2. B = Explosion-Proof (防爆, Fángbào)
3. C = Counter-Rotating (对旋, Duìxuán)
4. D = Motor Direct Drive (电机对旋, Diànjī duìxuán - specifically meaning the motors are directly coupled to the impellers, one for each rotor, and are located inside the fan casing).
5. Z = Axial Flow (轴流式, Zhóuliúshì)

Putting it together (FBCDZ):

• FBCDZ means "Fan, Blast (exhaust/forced ventilation), Counter-rotating, Direct drive, Zaxial flow."

10 = Motor Power/Frame Size Code

• This number usually refers to the power of the motor or a specific design iteration. In this context, it often corresponds to a specific motor power rating range or design variant for the series.

No22 = Impeller Diameter (Rotor Diameter)

• No22 means the diameter of the fan impeller (the rotating blades) is 22 decimeters (dm), which is 2 meters (or approximately 87 inches).

Complete Meaning of "FBCDZ-10-No22"

This describes a Mine Exhaust Explosion-Proof Counter-Rotating Axial Flow Fan with a specific motor/design code (10) and an impeller diameter of 2 meters.

Key Features & Application

• "Exhaust" Implication: The "Z" in the model can sometimes imply "exhaust" (抽出式, Chōuchūshì) in contrast to "G" (supply). In coal mines, these fans are primarily used as the main ventilation fan on the surface to exhaust (pull) foul air (methane, dust, gases) out of the mine.
• Explosion-Proof (B): This is critical for coal mines where methane gas is present. The fan casing, motor, and electrical components are designed to contain any internal explosion without igniting the surrounding atmosphere. The motors are typically flameproof (Exd).
• Counter-Rotating (C): The fan has two impellers (rotors) that spin in opposite directions. This design:
  • Provides very high pressure (static pressure) without needing guide vanes.
  • Allows for reversible airflow (for emergency ventilation or relocating the mine face) simply by reversing the rotation of the impellers.
  • Achieves higher efficiency compared to single-stage axial fans.
• Direct Drive (D): The motors are directly connected to the impellers (no belts or gears). This reduces maintenance, increases reliability, and allows for easier speed control (via variable frequency drives - VFDs).

Typical Specifications for this Model (Approximate)

Note: Exact specs vary by manufacturer (e.g., Shandong, Henan, Sichuan fan factories). Based on a 2.2m impeller:

• Airflow (Q): 30 – 80 m³/s (63,500 – 170,000 CFM) depending on speed and blade angle.
• Static Pressure (P): 1,500 – 4,500 Pa (6 – 18 inches w.g.) depending on motor power and speed.
• Motor Power: Typically 2 × 55 kW to 2 × 160 kW (two motors, one for each impeller). The "10" code might correspond to a specific power range, often around 2×90kW to 2×132kW.
• Speed: 740 – 990 RPM (four-pole motors, typically 8 or 10 pole for large diameter).
• Noise: 85 – 90 dB(A) with silencers.

Applications

• Primary Mine Ventilation (Main Fan): Installed at the surface of underground coal mines to continuously extract contaminated air.
• Tunnel Ventilation: Long roadways or tunnels in mining or civil engineering.

Key Advantages of this Design

1. High Efficiency: Counter-rotating design minimizes energy losses.
2. High Pressure: Capable of overcoming high resistance from long underground roadways.
3. Reversibility: Can reverse airflow direction easily without mechanical dampers.
4. Reliability: Simple direct drive with explosion-proof motors.
5. Safety: Essential for methane drainage and maintaining safe oxygen levels underground.

Important Note for Compliance:

If you are specifying or purchasing this fan, it must come with a valid MA (Mine Safety) Certificate issued by a recognized authority (like the Coal Mine Safety Administration in China or equivalent international body) to be legally used in an underground coal mine. The fan must also meet local standards for explosion-proof equipment (e.g., ATEX, IECEx, or GB standards).