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Resonant cavity noise elimination device, noise-eliminating volute, centrifugal fan and road cleaning device

A technology of resonance cavity and muffler device, which is applied in resonance cavity muffler device, centrifugal fan and road cleaning device, muffler volute field, can solve noise pollution, lack of noise reduction design of centrifugal fan, discrete noise of centrifugal fan big problem

Active Publication Date: 2017-05-17
ZOOMLION ENVIRONMENTAL IND CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The centrifugal fan in the existing road cleaning device includes a special fan volute, such as Image 6 As shown, the fan volute mainly includes a volute part 8' and a volute tongue part 7'. However, due to the lack of noise reduction design of the centrifugal fan, the discrete noise of the centrifugal fan is too large when the road cleaning device is in operation, thus serious noise pollution

Method used

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  • Resonant cavity noise elimination device, noise-eliminating volute, centrifugal fan and road cleaning device
  • Resonant cavity noise elimination device, noise-eliminating volute, centrifugal fan and road cleaning device
  • Resonant cavity noise elimination device, noise-eliminating volute, centrifugal fan and road cleaning device

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Embodiment Construction

[0046] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0047] Figure 1 to Figure 3 A schematic structural view of the resonant cavity noise reduction device provided by the present invention is shown. Such as figure 1 As shown, the resonance cavity noise reduction device includes a front plate 1 with a curved surface, a closed enclosure 2 extending from opposite sides of the front panel 1 to a closed enclosure, and sealing the front panel 1 and the enclosure 2 to form a closed chamber 4 of the siding 3 . Wherein, a plurality of through holes 5 are provided on the curved surface of the front plate 1 , and at least two resonance chambers with different volumes are formed in the closed chamber 4 .

[0048] Throug...

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Abstract

The invention relates to the field of road cleaning, and provides a resonant cavity noise elimination device, a noise-eliminating volute, a centrifugal fan and a road cleaning device. The resonant cavity noise elimination device comprises a front plate (1) with a curved surface, an encircling plate (2) and wall plates (3), wherein the encircling plate (2) extends from the relative two sides of the front plate (1) to be sealed, and the wall plates (3) are combined with the front plate (1) and the encircling plate (2) in a sealing mode so as to form a sealed cavity (4). A plurality of through holes (5) are formed in the curved surface of the front plate (1), and at least two resonant cavities with different sizes are formed in the sealed cavity (4). The resonant cavity noise elimination device can conduct noise reduction and elimination on an existing fan volute, and therefore the noise pollution of the centrifugal fan is greatly reduced, and the centrifugal fan can be used in a more comfortable and environmentally-friendly mode.

Description

technical field [0001] The invention relates to the field of road cleaning, in particular to a resonance cavity noise reduction device, a noise reduction volute, a centrifugal fan and a road cleaning device. Background technique [0002] The road cleaning device is mainly used to clean the road surface, usually integrating cleaning and suction. During the operation of the road cleaning device, the centrifugal fan is used as the main component of the road cleaning device to realize the gas discharge, that is, the centrifugal fan relies on the input mechanical energy to increase the gas pressure and discharge the gas. [0003] The centrifugal fan in the existing road cleaning device includes a special fan volute, such as Image 6 As shown, the fan volute mainly includes a volute part 8' and a volute tongue part 7'. However, due to the lack of noise reduction design of the centrifugal fan, the discrete noise of the centrifugal fan is too large when the road cleaning device is i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66F04D29/42
CPCF04D29/4233F04D29/665
Inventor 李亮张斌万军滕新科
Owner ZOOMLION ENVIRONMENTAL IND CO LTD
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