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K and DK series of mine energy-saving axial flow fans

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Description

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Product Description

The new K and DK series of mine energy-saving axial flow fans have been designed based on the original K series of mine energy-saving fans by the Metallurgical Ministry and China Nonferrous Metals Corporation Mine Energy Saving Promotion Station. Through technological improvements and structural enhancements, the efficiency has been increased, and the range of sizes has been expanded. These fans feature higher operational efficiency, lower noise levels, and a broader performance range, resulting in better compatibility with mine ventilation networks and more significant energy-saving effects. Additionally, they are equipped with a steady-flow ring anti-surge device inside the main air duct, ensuring a smooth characteristic curve without humps, which guarantees stability in multi-fan joint operation under any resistance conditions.

To expand the performance coverage of this series of fans and meet the ventilation needs of various large, medium, and small metal mines, enabling low, medium, and high-resistance as well as large, medium, and small airflow types of ventilation networks to select main fans, auxiliary fans, and multi-stage station fans operating in high-efficiency zones, we have adopted three basic hub ratios of 0.40, 0.45, and 0.62, along with two structural forms: single and counter-rotating (divided into K and DK types). The K series uses 4, 6, and 8-pole motors for three different speeds, while the DK series uses 6, 8, 10, and 12-pole motors for five different speeds, totaling 700 specifications and models. With the hub ratio varying continuously from 0.40 to 0.62, a total of 16,000 specifications and models can be formed, creating a vast series of fans that can be reasonably matched with the ventilation networks of any metal mines nationwide, thus achieving high operational efficiency.

The new K and DK series of mine fans are specifically designed to meet the ventilation needs of various metal mines in metallurgy, nonferrous metals, gold, chemicals, building materials, and nuclear industries. They can serve as main or auxiliary ventilation fans, suitable for installation both on the surface and underground, making them ideal for multi-fan joint operation in multi-fan series and parallel systems and multi-stage station ventilation systems. They are also applicable for ventilation and air exchange in large workshops, tunnels, civil air defense projects, and other environments.

Features

1. Utilizes advanced C-4/II type space-distorting wing-shaped blades, designed according to 'three-dimensional flow' principles, resulting in high aerodynamic efficiency, which is the premise and foundation for energy-saving performance of the fan.

2. Wide performance range and complete specifications, capable of matching various resistance and airflow types of mine ventilation networks, ensuring long-term efficient operation with significantly noticeable actual energy-saving effects.

3. Equipped with a steady-flow ring anti-surge device, the characteristic curve has no hump, eliminating surge risks, allowing safe and stable operation under any resistance conditions, particularly suitable for combined multi-fan operations.

4. Employs the simplest direct-connected structure of motor and impeller, providing excellent overall stability, easy installation, and maintenance, with low local resistance. Compared to belt and long-shaft transmission, it offers higher transmission efficiency, no transmission faults, and no risk of shaft breakage, minor ground subsidence, or slippage does not affect normal operation.

5. Compact structure with good moisture-proof performance. The main body of the fan is made of steel plates and structural steel welded together, with hollow steel plate material for the blades, and medium carbon alloy steel for the blade shafts, heat-treated for high strength. Suitable for surface or underground installation, especially ideal as a station fan in multi-stage ventilation systems.

6. Can reverse direction directly for counterflow, with a counterflow rate exceeding 60%, eliminating the need for reverse airflow ducts.

7. Adjustable blade angle, allowing real-time adjustment of fan operating conditions based on changes in mine production.

8. Minimal civil engineering work, saving substantial construction investment.

9. Low operational noise, with optional impedance silencers for further noise reduction if required.

Structure of the Fan

1. K series mine energy-saving axial flow fans feature a direct-connected structure, with the main body of the ventilator made from steel plates and structural steel welded together, housing the motor and impeller, offering a compact and stable design. The main body includes a steady-flow ring device to ensure the fan's characteristic curve has no hump, avoiding surge risks. The fan consists of four parts: collector, main unit, diffuser, and sometimes a diffuser tower.

2. DK series mine energy-saving axial flow fans have two stages of impellers closely mounted on two stages of motors, forming a contra-rotating dual-stage structure. The fan comprises five parts: collector, first-stage main unit, second-stage main unit, diffuser, and sometimes a diffuser tower.

3. For K and DK series fans of model number 12 and below, the main units adopt an integral structure. For models 12 and above, the main units are split horizontally, with horizontal flanges welded at the seam, sealed with gaskets for a tight seal.

Diffuser

For K and DK series mine energy-saving axial flow fans used as main or station fans, a dedicated diffuser is generally recommended. Surface-mounted main fans with diffusers convert part of the dynamic pressure into static pressure, reducing outlet dynamic pressure loss for energy savings. Underground fans with diffusers reduce local resistance coefficients and outlet dynamic pressure values, significantly lowering the local resistance of the fan system and saving ventilation electricity consumption.

K and DK series mine energy-saving axial flow fans come with dedicated diffusers. The diffuser inlet flange connects to the fan outlet flange using bolts.

K and DK series of mine energy-saving axial flow fans (1)

K and DK series of mine energy-saving axial flow fans (2)

K and DK series of mine energy-saving axial flow fans (3)

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Products

Products

How do fan shafts impact industrial efficiency?

How do blowers advance environmental protection?

How do high-temp gas fans improve industrial efficiency?

How are corrosive gas fans innovating sustainability?

What’s the role of induced draft fan furnaces?

What’s the role of induced draft fan furnaces?

K and DK series of mine energy-saving axial flow fans

Description

marker

Product Description

Features

Structure of the Fan

Diffuser

contact us

Related popular products

Wear-resistant centrifugal fans

Smoke exhaust fans

High-temperature draft fans

An auxiliary combustion fan

Anti-corrosion centrifugal fans

Desulfurization fans

Dust removal centrifugal fans

High-pressure centrifugal blowers

Impeller of a centrifugal fan

Anti-corrosion axial flow fans

Multi-stage centrifugal blower

Coal gas booster fan

FBD series (dⅠ) explosion-proof pressure-injection counter-rotating axial flow local ventilation fan

Roof axial fans

Boiler centrifugal induced draft fans

XQ-type inclined chute high-pressure centrifugal fan

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