The Ministry of Public Security promulgated and implemented GB51251-2017 "Technical Standard for Building Smoke Prevention and Smoke Exhaust Systems" on August 1, 2018, which specified clear requirements for mechanical pressurized air supply and smoke exhaust in various places, as well as fire protection supporting facilities. The protection of wind turbines puts forward higher requirements.
DECENT Fan independently developed centrifugal fire smoke exhaust fans through mutual understanding and mutual discussions with well-known architectural design units, large installation companies and customers in the industry, and combined with the specific requirements of the new standards. This series of fans has passed relevant inspections and inspections by the fire department. Certification. It can well meet the new standards' requirements for air supply and smoke exhaust in buildings, and some models have been used in related projects.
The centrifugal fire smoke exhaust fan adopts a backward-inclined plate impeller and a lateral double-inlet air inlet form. It has the characteristics of large air volume and high pressure, as well as simple installation and convenient maintenance.
01 Panel
The box body adopts the form of double-layer plywood. The outer and inner plates are made of high-quality steel plates, and the middle is filled with sound-absorbing fireproof cotton. It has the characteristics of high structural strength and excellent flame retardant performance.
02 frame
It is made of galvanized steel and is connected by fasteners. Welding is not used to damage the outer surface of the material. Structures such as center columns are added to ensure the overall strength of the frame. Combined assembly enables on-site assembly for situations where transportation is inconvenient. Flexible installation.
03 volute
It is made of high-quality galvanized sheet (carbon steel sheet) with anti-corrosion treatment. The sheet is cut by a fully automatic high-precision laser, and the cutting surface is smooth and flat. The worm plate is processed into one piece using a fully automatic undercut machine for precise undercutting or a fully automatic welding machine for welding. Type, the board surface is reinforced by rolling ribs.
04 impeller
The double-inlet backward-inclined impeller is made of high-quality hot-rolled steel plates. The flat blades designed according to the ternary flow theory are welded to the front disk processed on a fully automatic high-precision laser cutting machine. The ABB robot automatically welds the impeller for high-speed heavy loads. The impeller is reinforced with round steel. All impellers undergo dynamic and static balance testing, and the balance accuracy reaches G2.5 level.
05 axis
The fan shaft is made of 45# low-alloy steel, which is made by turning, quenching and tempering heat treatment, and grinding. It has high strength and low interference. The dimensional tolerance and shape tolerance of the shaft diameter are strictly controlled. Each shaft is coated and anti-rust.
06 Bearing
The fan uses high-quality self-aligning seated ball bearings, which are optimized to minimize noise. Light-weight bearings are selected for low speeds, which have low noise and long life. Heavy-duty bearings are selected for high speeds, which are high-strength, safe and reliable. The bearings are equipped with lubricating oil holes. , the later maintenance is easy, the bearing is installed on the bearing bracket, the bearing life is L10 ≥ 100000 hours; imported brands such as NSK and FYH are optional.
07 Air inlet and outlet flange
The flange is integrally formed by a galvanized steel forming machine, and is connected to the box through fasteners. It is easy to disassemble, has beautiful appearance, and has sufficient stiffness and strength.
08 motor
Select domestic high-quality brands, and can also configure according to customer requirements. The motor protection grade is IP54 or above, the insulation grade is F, and imported brands such as ABB and Siemens are optional.
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