Combined silencing, sound-insulating and vibration-isolating device of centrifugal fan

Abstract

The invention discloses a combined silencing, sound-insulating and vibration-isolating device of a centrifugal fan. The combined silencing, sound-insulating and vibration-isolating device of the centrifugal fan comprises a silencer, an acoustic shield and vibration isolators, the silencer is integrated with the acoustic shield, silencer parts on two lateral surfaces form a silencing elbow, and an L-shaped silencing passage is formed to improve the silencing capacity; a fan, a motor and a bracket are arranged on a heavy concrete pedestal through a plurality of vibration isolators, and the mass centers of the fan, motor and bracket pass through the centers of the vibration isolator planes so as to prevent the fan shaking. The combined silencing, sound-insulating and vibration-isolating device of the centrifugal fan is simple in structure, the silencer is integrated with the acoustic shield, the silencer is L-shaped, the amplitude of the silencing and sound-insulating device is reduced, and the silencing capacity is improved; the device is arranged on the heavy concrete pedestal through the vibration isolators, and the mass center of the whole body passes through the centers of the vibration isolator planes so as to prevent the fan shaking.

Description

technical field [0001] The invention belongs to the field of fan noise control, and in particular relates to a sound-absorbing, sound-insulating, and vibration-isolating composite device for a centrifugal fan. Background technique [0002] The vibration and noise produced by the centrifugal fan is one of the main reasons for the environmental noise pollution of industrial enterprises. There are two main measures to reduce the noise of the fan (see figure 2 ): one is to install the muffler 5 directly at the fan air inlet 1 of the fan 3, this method is only effective for reducing the intake noise of the fan, but cannot reduce the noise radiated by the metal casing of the fan; the other is to install the muffler 5 on the fan 3 The sound insulation cover 4 is placed on the outer cover of the sound insulation cover 4, and the muffler 5 is installed at the external air inlet of the sound insulation cover 4. Although this method reduces the noise emitted by the fan casing, it canno...

AI Technical Summary

Problems solved by technology

[0002] The vibration and noise produced by the centrifugal fan is one of the main reasons for the environmental noise pollution of industrial enterprises. There are two main measures to reduce the noise of the fan (see figure 2 ): one is to install the muffler 5 directly at the fan air inlet 1 of the fan 3, this method is only effective for reducing the intake noise of the fan, but cannot reduce the noise radiated by the metal casing of the fan; the other is to install the muffler 5 on the fan 3 The sound insulation cover 4 is placed on the outer cover of the sound insulation cover 4, and the muffler 5 is installed at the external air inlet of the sound insulation cover 4. Although this method reduces the noise emitted by the fan casing, it cannot control the sound transmission of the fan through the structure of the bottom mounting frame. , and because the motor is also covered in the sound insulation cover, the heat generated by the motor cannot be dissipated, which affects the service life of the motor and the safety of the circuit

Images