I. Overview
The new generation K, DK (now named FKZ, FKCDZ by the safety standard certification) series of mining energy-saving fans have been successfully designed by improving technology, refining structure, enhancing performance, and expanding the model range from the original mining energy-saving fans. This series boasts higher operating efficiency, lower noise, a broader performance range, and more significant energy-saving effects. Additionally, the main air duct is equipped with a flow stabilizing ring, ensuring a non-peak characteristic curve that guarantees stable operation of the fan under any air resistance condition.
To expand the performance range of this series of fans to meet the needs of various large, medium, and small non-coal mines, and to ensure that ventilation networks with low, medium, and high resistances and large, medium, and small air volumes can all select main fans, auxiliary fans, and multi-stage station fans operating in the high-efficiency zone, this series of fans are available in two hub ratios of 0.40 and 0.45, and in two structural types: single-machine and counter-rotating. This results in four models: K40, K45, DK40, and DK45. The K40 models are equipped with 4, 6, and 8-pole motors for three speeds, while the K45 models have 4 and 6-pole motors for two speeds. Both the DK40 and DK45 models are equipped with 6 and 8-pole motors for two speeds.
By combining the various machine numbers with two types of wheel hubs, two structural styles, and three speeds in a certain manner, the series of fans consists of a total of 93 specifications.
Purpose
This series of fans is specifically designed to meet the needs of various non-coal mining industries such as metallurgy, non-ferrous metals, gold, chemicals, building materials, and nuclear industries. They can serve as main or auxiliary fans, and are suitable for installation both on the surface and underground. They are ideal for multi-fan operation and are perfect for multi-stage fan stations in a series-parallel multi-stage ventilation system. They are also suitable for ventilation and air exchange in large workshops, tunnels, civil defense projects, and other similar environments.
III. Features
Key Features of the K Series Fans:
1. Utilizing twisted wing-shaped blades, it boasts high aerodynamic efficiency and exhibits extremely significant energy-saving effects.
2. Diverse in performance and comprehensive in specifications, it perfectly matches various resistance and airflow types of ventilation networks, ensuring long-term and efficient operation.
3. Equipped with a flow stabilizing device, the characteristic curve has no hump and no risk of surge, ensuring safe and stable operation under any resistance condition. It is also suitable for the joint operation of multiple fans.
4. Utilizes a direct connection between the electric motor and impeller, featuring good overall stability, easy installation, straightforward maintenance, and low local resistance.
5. Compact structure with excellent moisture resistance. The fan body is made of steel plate and shaped steel welding, with blades made of steel plate material, hollowed, featuring high strength in both blades and the entire unit. It has strong resistance to underground blasting shockwaves, suitable for installation on the surface as well as underground, particularly well-suited for use as a station fan in multi-stage station ventilation systems.
6. Capable of reversing reverse wind, with a reverse wind rate over 60%, no need for a reverse wind channel construction.
7. Blade installation angle is adjustable, allowing for real-time adjustments to the fan's condition in response to changes in mine production.
8. The civil engineering volume is minimal, allowing for significant investment savings.
9. Lower noise level.
Four: Diffuser
The K, DK series (now named FKZ, FKCDZ under the safety standard certificate) mining energy-saving fans, when used as main fans and station fans, should be equipped with special diffusers. The use of diffusers on surface main fans can convert dynamic pressure into static pressure, reducing the dynamic pressure loss at the outlet to achieve energy-saving goals. Fans installed underground with diffusers can both lower the local resistance coefficient and reduce the dynamic pressure value at the diffuser outlet, significantly decreasing the local resistance of the fan unit and saving ventilation energy consumption.
