Structural features The explosion-proof centrifugal fan is mainly composed of an impeller, a casing, an air inlet, an adjustment door and a transmission part. (1) The aluminum impeller is welded by 12 rear-tilted wing-shaped aluminum blades between the curved wheel cover and the flat-shaped wheel. Thanks to the wing-shaped blades, the fan is highly efficient, low noise and high. strength. The impeller is operated smoothly by static and dynamic balance correction. The structure of the ventilation and impeller of the same machine is the same. (2) The casing of the casing is a volute formed by welding ordinary steel plates. The casing of the fan is made into a unitary structure. For the induced draft fan, a ash door is opened on the volute plate, and at the same time, it is appropriately thickened to prevent the ash from being worn and prolonging its service life. (3) The air inlet is a convergent streamlined overall structure, which is bolted to the inlet side of the casing. (4) A device for adjusting the flow rate of the fan. It consists of 13 flower-shaped blades, all of which are axially mounted in front of the air inlet. Thanks to the external transmission structure, the rotation is flexible and convenient. The adjustment range is from 90° (fully closed) to 0° (fully open). Adjust the position of the handle of the door, as seen from the direction of the air inlet, on the right side. For the right-handed fan, the push-up from the bottom to the top is from full-close to full-open; for the left-handed fan, the pull-up from the top to the full-open direction. (5) The transmission group consists of a main shaft, a bearing housing, and a coupling. The spindle is made of high quality steel. Water-cooled integral bearing housing with rolling bearing. Therefore, it is necessary to install a water pipe, and the water consumption varies depending on the ambient temperature, and is generally considered to be 0.5 to 1 m3/h. A thermometer and oil level indicator are mounted on the bearing housing. The fixing parts of the explosion-proof centrifugal fan cause resonance the reason: 1. The cement foundation is too light or the grouting is poor or the plane size is too small, causing the fan foundation and the foundation to be disconnected, the anchor bolts are loose, and the joint of the machine base is not firm enough to make the foundation stiffness insufficient; 2. The rigidity of the fan base or the volute is too low; 3. The inlet and outlet pipes connected to the fan are not supported and softly connected; 4. The proximity of the facility to the foundation of the fan is too close, or its stiffness is too small; Approach: 1. Reinforce the foundation or re-grout and tighten the nut; 2. Strengthen its rigidity; 3. Add support and soft connection; 4, increase the stiffness; Explosion-proof centrifugal fan bearing temperature is too high Cause: 1. Bearing damage; 2. The selection of lubricating oil or lubricating grease is incorrect; 3. The lubricating oil level is too high or lack of oil; 4. The amount of cooling water is insufficient; 5. The motor and fan are different from one center line; 6. Rotor vibration; Approach: 1. Replace the bearing; 2. Re-select and replace the appropriate oil; 3. Adjust the oil level; 4. Increase the amount of cooling water; 5. Find the radial and axial levels; 6. Find balance on the rotor. Sealing Machine,Tube Filling And Sealing Machine,Tube Filling Machine,Automatic Tube Sealing Machine ZHEJIANG FUCHANG MACHINERY CO., LTD. , https://www.fuchangmachinery.com
Explosion-proof centrifugal fan composition and troubleshooting
Proof centrifugal fan is mainly composed of: an aluminum-made blade, casing, couplings, shafts, wind pressure explosion-proof motor and impeller is the main energy for power transmission member; main housing for introducing air and exhaust gas while the gas Part of the kinetic energy becomes pressure energy; the coupling is used to connect the motor and the fan to transmit torque.