Vibration test and analysis during fan operation Before the fan is ready to start, the sensor of the vibrometer is placed in the horizontal direction of the bearing seat at both ends of the fan. After the fan is started normally, under the condition of normal air volume, wind pressure and speed, Observe the amount of vibration displayed on the vibrometer. That is, the amount of vibration of the fan measured under various conditions. Within half a month of continuous operation of the fan, there were successive problems such as cracking of the steel expansion joint of the fan inlet and outlet, tearing of the partition at the secondary impeller of the fan, and welding of the weld at the outer side wall of the secondary impeller. After the foreign experts and the relevant technical personnel of our factory confirmed the disintegration of the fan, there are many defects in the design of the fan: 1 The hard connection of the fan inlet and outlet is easy to cause the casing to resonate with the pipeline; 2 The rotor itself has dynamic balance difference; 3 The strength of the casing is weak. To this end, technical transformation is needed to eliminate the deficiencies that exist. It can be seen from Table 3 that the improved vibration amount is significantly reduced, which fully satisfies the normal operation of the fan. Measures to eliminate fan vibration. The on-site dynamic balance correction of the fan rotor is due to the rotor rotor impeller diameter of 2300mm and the rotor mass of 3700kg, which can only be corrected in the field. Plastic product processing for strength reinforcement of the fan casing. From the tearing of the baffle on the secondary impeller side and the weld bead welding on the outer side wall of the secondary impeller appearing during the operation of the fan, it is made of 10mm thick steel plate. The strength of the casing is obviously insufficient. For this reason, in addition to the repair welding of the original weld, a plurality of 20mm thick rib plates are added to the outer surface of the casing, and at the same time, the air inlet between the first and second impellers The secondary impeller ventilator adds a reinforcing support rod to increase the overall strength of the fan housing. The steel expansion joints of the fan inlet and outlet are changed into soft joint expansion joints. From the fracture phenomenon of the steel expansion joints of the inlet and outlet appearing during the operation of the fan, the rigid connection of the fan inlet and outlet is easy to make the fan casing Resonance with the inlet and outlet ducts, resulting in increased vibration of the casing, the use of special canvas expansion joints can eliminate resonance and reduce the vibration of the casing. In addition to the above measures to eliminate vibration, the bearing working clearance of the fan was adjusted, and the fan inlet filter was modified. The implementation of these measures greatly reduced the vibration of the fan and kept the operation of the fan. Stable state. Buy Badminton Set,Badminton Bags,Fiber Badminton Racket,Plastic Badminton Racket Set HANGZHOUÂ LEMONÂ IMPORTÂ ANDÂ EXPORTÂ CO.,LTD. , https://www.lemonsports-factory.com