Type 9-28 High pressure centrifugal fan Forward curved long and short blade impeller, convergent air inlet, high pressure, large flow, high efficiency Centrifugal fan The total pressure efficiency is about 83%. With wide efficiency area and wide performance coverage, it is one of the high-pressure fans widely used in various industries.

1. Purpose of fan

The 9-28 type high-pressure centrifugal fan is generally used for forging and smelting furnaces and high-pressure forced ventilation, and can also be used to transport materials, air, and gases without corrosion, spontaneous combustion, explosion, volatilization, and viscous substances. The medium temperature generally does not exceed 50 ℃ and 80 ℃, and the dust and hard particles contained in the medium are not more than 150mg/m3.

2. Fan type 1. The fan is single suction type, usually with 13 fan numbers: № 4, 4.5, 5, 5.6, 6.3, 7.1, 8, 9, 10, 11.2, 12.5, 14, 16.

3. The fan is usually made into two types: right rotation and left rotation.

4. The outlet position of the fan is expressed by the outlet angle of the casing. The "left" and "right" fan casings are made into 0 °, 45 °, 90 °, 135 °, 180 ° and 225 °. 3. Structure of fan The fan is mainly composed of impeller, casing, air inlet, support, etc.

(1) Impeller: 9-28 type fan has 16 long and 16 short blades, all of which are forward curved. The peripheral linear speed of the impeller diffuser shall not exceed 140m/s. After the impeller is formed, it is calibrated by static and dynamic balance, so it runs smoothly.

(2) Casing: it is welded into a whole volute shell with ordinary steel plate.

(3) Air inlet: It shall be made into a convergent streamlined overall structure and fixed on the front cover plate with bolts.

(4) Drive group: composed of main shaft, bearing box, coupling, etc. The main shaft is made of high-quality steel, and the bearing box is of integral structure. Rolling bearing shall be adopted and lubricated with grease.

5. High pressure centrifugal fan is commonly used in smelting furnace, cupola, incinerator, boiler, electroplating, breeding, environmental protection, ceramic kiln and other occasions where high pressure air supply, air blast combustion support, rapid cooling, vessel blowing, glass tempering, powder separation, etc. are required, as well as the pneumatic transportation of powder particles and small pieces of materials in grain and oil, feed, mining, building materials, chemical industry and other industries Wind classification system.