FBCDZ-6-No30 Coal Mine Exhaust Explosion-Proof Counter-Rotating Axial Flow Fan

This article's table of contents introduction:

1. Model Breakdown: FBCDZ-6-No30
2. Full Translation & Definition
3. Key Features and Design
4. Application
5. Specifications Summary

This is a specific model designation for a specialized industrial fan used in underground mining operations. Let's break down the name FBCDZ-6-No30 to understand exactly what this machine is.

Model Breakdown: FBCDZ-6-No30

• F: Fan
• B: Explosion-proof (防爆, Fángbào)
• C: Coal mine (煤矿, Méikuàng)
• DZ: Counter-rotating axial flow (对旋轴流式, Duì xuán zhóu liú shì)
• 6: Motor Pole Count (6-pole motor, typically running at ~980 RPM on a 50Hz supply)
• No30: Impeller Diameter (30 dm = 3,000 mm or 118 inches)

Full Translation & Definition

FBCDZ-6-No30 Coal Mine Exhaust Explosion-Proof Counter-Rotating Axial Flow Fan

This is a large, explosion-proof, two-stage axial fan specifically designed for the main ventilation system of an underground coal mine. Its primary function is to exhaust (pull out) stale, dusty, or potentially explosive air (containing methane gas) from the mine.

Key Features and Design

1. Explosion-Proof (B): The fan casing, motor, and all components are designed to contain any internal explosion (e.g., from methane ignition) and prevent it from spreading to the surrounding mine atmosphere. This is critical for safety in gassy mines.
2. Counter-Rotating (DZ): The fan has two impellers mounted on the same axis but rotating in opposite directions.
   • Why? This design eliminates the need for stationary guide vanes (which are common in single-stage axial fans). The rear impeller acts as the guide vane for the flow from the front impeller, recovering energy and increasing efficiency. It also provides very high pressure compared to standard axial fans, which is necessary for overcoming the resistance of long, complex mine tunnels.
3. 6-Pole Motor (6): The motor runs at a slower speed (approx. 980-1000 RPM). This reduces mechanical wear, noise, and allows the large 3-meter diameter impeller to operate safely without excessive tip speeds.
4. No30 (3m Diameter): This is a massive fan. It moves an enormous volume of air. Typical airflow for a No30 fan can range from 6,000 m³/min to over 15,000 m³/min (depending on pressure and blade angle), which is equivalent to the total air volume of several large commercial buildings every minute.

Application

This specific fan model is used as a Main Mine Fan (MMF) .

• Location: Installed on the surface at the mine's exhaust shaft.
• Role: It creates a negative pressure (vacuum) inside the mine, drawing fresh air down the intake shaft, through the working faces, and out the exhaust shaft.
• Safety: It must be reversible. In the event of a fire or gas outburst, the fan can be reversed to change the direction of airflow in the mine.

Specifications Summary

In short: The FBCDZ-6-No30 is a critical piece of life-safety equipment. It is the "lungs" of a large coal mine, designed to be powerful, durable, and absolutely safe in an explosive atmosphere.