CN2078808U

CN2078808U - High-efficient silencing apparatus

Info

Publication number: CN2078808U
Application number: CN 90221575
Authority: CN
Inventors: 王法源
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-10-06
Filing date: 1990-10-06
Publication date: 1991-06-12

Abstract

The utility model relates to a high-efficient silencing apparatus, particularly the silencer used in inlet and outlet pipe lines or pipes, and the high-efficient silencing apparatus at least comprises one rotary impeller for consuming sound energy, and stationary damping components. The utility model is characterized in that the downstream points of the rotary impellers are provided with wedge absorber panels, the wedge absorber panels are studded with spaced wedges and small holes and are arranged in damping shrouds in a way of facing to the upstream points, the damping shrouds are provided with small holes which are densely distributed, the inner split sticking to a shell is provided with a sound absorbing lining board. When the silencing apparatus is used for inlet and outlet pipes of the compressor, the internal-combustion engine and the blower fan, noise can be reduced by 10-20 db, and vibration is obviously reduced.

Description

Efficient silencer

The utility model relates to a kind of efficient silencer, and especially the silencing apparatus that uses in intake and exhaust pipeline or piping particularly, can be used for air compressor, on the intake and exhaust pipelines such as internal-combustion engine, blower fan.

In Chinese patent application 88106682, a kind of airflow noise-elimination method and device are disclosed in 6, its objective is: make its sound reduction method that provides and the device can be in whirligig the energy storage of air-flow, and be converted to the rotation function of this device, meanwhile, can also aspirate or air inlet is pressurizeed exhaust when needed.Its formation is: the rotary blade of a sound energy consumption is housed in this device at least, also disposes damping plate and damping sleeve pipe as static damping member simultaneously.Because this device is based on expansion, interfere noise-cancelling theory and a kind of reactive muffling scheme of drawing, should affirm it for the low-frequency noise source, have good noise elimination effect, but then seem not good enough for the noise elimination effect of middle and high audio-frequency noise.

For this reason, the purpose of this utility model is that a kind of efficient silencer will be provided, and it not only has better noise elimination effect to low-frequency noise, and can reduce middle and high audio-frequency noise effectively.

Technical solution of the present utility model is: a kind of efficient silencer, especially the silencer that in intake and exhaust pipeline or piping, uses, the rotary blade of a sound energy consumption is housed within it at least, and be provided with static damping member, its special way is: the downstream part at rotary blade is provided with the wedge absorber plate, be abound with alternate each other wedge and aperture on this wedge absorber plate, and in upstream end is contained in the damping cover, the aperture that has dense distribution on the damping cover, the inwall that pastes housing is provided with the sound absorption liner plate.

And the wedge height of described wedge absorber plate can be 1/2nd of wavelength (people).

And outside described damping cover, suit another damping cover.

And the material of described sound absorption liner plate is a noise reducing plate.

The utility model is in the advantage that has possessed above-mentioned application case, owing to set up resistance noise reduction members such as wedge absorber plate and sound absorption liner plate, thereby widened noise elimination frequency band (100～4000HZ), the opinion if divide, then the former centering, low-frequency noise, latter's centering, high-frequency noise have tangible acoustically effective respectively.When being used for the intake and exhaust pipeline of air compressor, internal-combustion engine, blower fan, can making noise descend 10～20 decibels, and vibrate three values (acceleration, vibration velocity, displacement) obvious decline is also arranged.Remove in addition, the damping cover that is sleeved on has together constituted two-stage restricting orifice (being mainly used in exhaust duct), owing to force emptying again after the high-pressure gas stepped throttling step-down, so have tangible noise reduction.

The drawing of accompanying drawing is described as follows:

Fig. 1 is the sectional view of signal the utility model structure.

Fig. 2 is the sectional view at Figure 1A-A place.

Fig. 3 is the plan view of wedge absorber plate.

Fig. 4 is the plan view (stain is a damping hole, and roundlet is a wedge) of Fig. 3.

The utility model is described in further detail below in conjunction with accompanying drawing:

Comprise housing [4] with reference to Fig. 1, Fig. 2, this silencer, the inwall place of the suction port end [1] of housing [4] is connecting a bearing [3] that extends to housing [4] inner chamber, there is an axle sleeve [16] by three gussets [14] supporting in the central authorities of bearing [3] end, the hole internal fixation of axle sleeve [16] one with housing [4] parallel axes the axle [15], a rotary blade [11] respectively is equipped with at the two ends of this axle [15], between the two for being slidingly matched.Cylindrical place by bearing [3] extending end, have and respectively connecting a damping cover [6,5] that extends to air outlet end [8] on two continuous ring-shaped steps [17,18], each step [17,18], that is two damping cover [5,6] be connected on the step [17,18] of bearing [3] in the mode of suit, and two be covered with aperture [9,13], wherein on the damping cover [5,6], the aperture of external damping cover [5] is 1～1.5mm (not high or when being used for the admission line place when exhaust pressure, as also can not want the external damping cover); The aperture of internal damping cover [6] is 2～2.5mm, a macropore [10] is arranged at its bottom, while is in the bottom inside of internal damping cover [6], a wedge absorber plate [12] (referring to Fig. 3 towards air-flow upstream end setting-in, Fig. 4), have on this wedge absorber plate [12] and be the aciculiform wedge [7] that " woods " shape is abound with, it highly is 1/2nd of a wavelength (people), and the root that has on the base plate of wedge absorber plate [12] with wedge [7] is the aperture [19] (covering in the macropore of internal damping cover bottom) that alternate shape distributes, wedge absorber plate [12] can be metalwork, also can for moulding (wherein, metalwork is applicable to that pipe temperature is higher than 80 ℃, and moulding is applicable to below 80 ℃).

On the inwall of housing [4] and bearing [3], be provided with sound absorption liner plate [2] (the HM87-10 noise reducing plate that can select for use Macheng City acoustic damping materials factory to produce), its Placement can be bonding.

Claims

1, a kind of efficient silencer, especially the silencing apparatus that in intake and exhaust pipeline or piping, uses, the rotary blade [11] of a sound energy consumption is housed within it at least, and be provided with static damping member, it is characterized in that, downstream part at rotary blade [11] is provided with wedge absorber plate [12], be abound with alternate each other wedge [7] and aperture [19] on this wedge absorber plate [12] and in upstream end is contained in damping cover [6], the aperture [13] that has dense distribution on the damping cover [6], the inwall that pastes housing [4] is provided with sound absorption liner plate [2].

2, silencer according to claim 1 is characterized in that: the wedge [7] of wedge absorber plate [12] highly is 1/2nd of wavelength (people).

3, silencer according to claim 2 is characterized in that, outside damping cover [6], suit another damping cover [5].

According to claim 1 or 2 or 3 described silencer, it is characterized in that 4, the material of sound absorption liner plate [2] is a noise reducing plate.