CN211573880U

CN211573880U - Silencer of blower

Info

Publication number: CN211573880U
Application number: CN201922371533.1U
Authority: CN
Inventors: 刘挥
Original assignee: Wuhan Gdw Brocoo Pneumatic Technique Co ltd
Current assignee: Wuhan Gdw Brocoo Pneumatic Technique Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-09-25
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses an air blower muffler aims at providing an air blower muffler who effectively reduces the air current noise of air-blower air inlet, and its technical scheme main points are, including connecting the amortization barrel on the air-blower, the amortization barrel is equipped with air intake, amortization passageway and air outlet, be equipped with first orifice plate and second orifice plate in the amortization passageway, the outer fringe of first orifice plate has first through-hole along circumference range for the air current can get into the below region of first orifice plate again after the dispersion, the gas flow energy has been consumed tentatively, the lower terminal surface of first orifice plate is equipped with the acoustical panel, the up end of second orifice plate is equipped with the amortization pad, the middle part of second orifice plate is equipped with the second through-hole, sets up the noise that has effectively reduced the air current velocity of flow change in-process through the combination of acoustical panel with the amortization pad.

Description

Silencer of blower

Technical Field

The utility model relates to a technical field of air-blower accessory especially relates to an air-blower muffler.

Background

With the development of the technology, the performance of the blower is continuously improved, and the suction and discharge effects on the air flow are stronger and stronger. For the air flow near the air inlet of the blower, the flow velocity of the air flow will suddenly become larger as the distance from the air inlet is reduced, thereby forming an unstable abrupt change region. Because the air current in sudden change district often is unstable, gaseous itself will take place violent collision, has aggravated the noise when air current gets into the air-blower greatly, has produced a large amount of noise pollution, seriously disturbs the normal operating environment of mill.

Disclosure of Invention

The utility model aims at solving the problem that the air current near the air blower air inlet among the prior art is unstable because of the sudden change of the velocity of flow, produces a large amount of noises near the air blower air inlet easily.

The technical solution of the utility model is that: the utility model provides an air blower silencer, including connecting the amortization barrel on the air blower, amortization barrel from the top down is equipped with air intake, amortization passageway and air outlet in proper order, be equipped with first orifice plate and the second orifice plate that is parallel to each other in the amortization passageway, the outer fringe range of first orifice plate has first through-hole, the up end of first orifice plate faces air intake and lower terminal surface are equipped with the acoustical panel, the second orifice plate set up in the below of first orifice plate, the acoustical panel is located the inboard of the range position of first through-hole just is used for leading the air current second orifice plate, the up end of second orifice plate is equipped with the amortization pad, the middle part of second orifice plate is equipped with the second through-hole.

The beneficial effect of above-mentioned scheme does: the first orifice plate is arranged in the silencing passage, so that the airflow can enter the lower area of the first orifice plate after being dispersed, and the energy of the airflow is consumed preliminarily; and the setting of acoustical panel makes the air current can be led the position that is close to the upper surface of amortization pad in the amortization, and the amortization pad can carry out the amortization to the air current better. When the air current flows to the second through hole, although the velocity of flow has accelerated, the noise that produces in the air current velocity of flow change process has effectively been reduced to the combination setting of noise reduction board and amortization pad.

Preferably, the amortization barrel is cylindrical, the diameter of air intake and air outlet all is less than the diameter of amortization passageway, be equipped with conical transition region between air intake and the amortization passageway to make the air current more steadily get into the amortization passageway from the air intake, and because the sectional area of amortization passageway is greater than the sectional area of air intake, avoided gas to reduce by a wide margin when passing first through-hole the flow area.

Preferably, first through-hole is four at least, first through-hole is followed the circumference evenly distributed of first orifice plate to make the air current more steadily and enter into the amortization passageway of first orifice plate below evenly after the first through-hole dispersion, improved the noise cancelling effect.

Preferably, the sound-absorbing plate is a circular cylinder, and an oblique angle is arranged on one side of the sound-absorbing plate close to the first through hole, so that the thickness of the upper end of the sound-absorbing plate is larger than that of the lower end of the sound-absorbing plate. Contact with the acoustical panel after the air current passes first orifice plate, the acoustical panel on the one hand tentatively consumes the energy of air current and realizes preliminary amortization this moment, and on the other hand acoustical panel leads the upper surface of amortization pad with the air current for the amortization pad can carry out the amortization to the air current better.

Preferably, the distance between the bottom end of the sound-absorbing plate and the upper end face of the second pore plate is larger than the diameter of the first through hole, so that the airflow speed between the first pore plate and the second pore plate is prevented from changing too fast, and secondary noise is avoided.

Preferably, the total cross-sectional area of the first through holes is smaller than or equal to the cross-sectional area of the second through holes, so that the air flow can more stably pass through the first through holes and the second through holes, and the sudden change of the flow speed of the air flow is prevented.

Preferably, the first through hole and the air inlet are staggered in the vertical direction, so that the air flow can pass through the first through hole after turning due to the blocking of the middle part of the first pore plate, and the energy of the air flow is consumed preliminarily.

Preferably, the material of the silencing plate is glass wool, the material of the silencing pad is polyester sponge, and the silencing pad is wavy. The glass wool can make the air current by the reposition of redundant personnel when flowing through the acoustical panel, and partly air current gets into the upper surface region of amortization pad along the direction of acoustical panel, and another fractional air current can directly pass the acoustical panel, has promoted the circulation efficiency of air current when guaranteeing the noise cancelling effect.

Drawings

FIG. 1 is a schematic front view of a blower muffler of the present invention (dotted line represents perspective);

FIG. 2 is a schematic cross-sectional view taken along line A-A in FIG. 1;

FIG. 3 is a schematic view of a first orifice plate of the blower muffler of the present invention;

FIG. 4 is a schematic view of a second orifice plate of the blower muffler of the present invention;

in the drawings: 1-an air inlet; 101-a transition region; 2-a silencing channel; 3, air outlet; 4-a first orifice plate; 401 — a first via; 402-a sound-absorbing panel; 5-a second orifice plate; 501-a second through hole; 502-sound damping pad; 6-blower.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1 and 2, the utility model discloses a 6 silencers of air-blower, the amortization barrel is cylindrical, and the top of amortization barrel is equipped with air intake 1, and the middle part is equipped with amortization passageway 2, and the lower part is equipped with air outlet 3, and air intake 1, amortization passageway 2 and air outlet 3 communicate in proper order. The diameters of the air inlet 1 and the air outlet 3 are the same and are both smaller than the diameter of the silencing passage 2. A conical transition area 101 is arranged between the air inlet 1 and the silencing passage 2, so that the air flow can circulate in the silencing cylinder more stably. The blower 6 is arranged under the silencing barrel and communicated with the air outlet 3.

As shown in fig. 3 and 4, the first orifice plate 4 and the second orifice plate 5 are both circular and have the same diameter as the sound-deadening channel 2. The first orifice plate 4 is installed in the first half of amortization passageway 2, and second orifice plate 5 is installed in the second half of amortization passageway 2, and first orifice plate 4 is parallel to each other with second orifice plate 5. Wherein the upper end surface of the first pore plate 4 is over against the air inlet 1, and the lower end surface is over against the second pore plate 5; the upper end face of the second pore plate 5 is opposite to the first pore plate 4, and the lower end face is opposite to the air outlet 3.

Eight first through holes 401 are arranged along the circumferential direction at the outer edge of the first orifice plate 4, the first through holes 401 are symmetrically arranged relative to the center of the first orifice plate 4, and the intervals between the adjacent first orifice plates 4 are equal. Of course, the number of the first through holes 401 may be other, but it should be ensured that the first through holes 401 are evenly distributed on the first orifice plate 4, so as to ensure that the airflow can more evenly pass through the first orifice plate 4 and enter the silencing passage 2. In addition, the larger the number of the first through holes 401 is, the larger the flow area of the first orifice plate 4 is, and the more favorable the air flow passes through. The lower end face of the first orifice plate 4 is provided with a circular annular sound-absorbing plate 402, the sound-absorbing plate 402 is positioned at the inner side of the first through hole 401, and the sound-absorbing plate 402 is made of glass wool. The side of the sound-absorbing panel 402 adjacent to the first through-hole 401 is beveled so that the thickness of the upper end of the sound-absorbing panel 402 is greater than the thickness of the lower end, so that the air flow, when passing through the first through-hole 401, can enter the upper surface of the sound-absorbing pad 502 along the direction of the sound-absorbing panel 402.

The middle part of the second pore plate 5 is provided with a second through hole 501, and the diameter of the second through hole 501 is equal to that of the air outlet 3. The upper end surface of the second orifice plate 5 is provided with a sound-deadening pad 502 made of polyester sponge, and the upper surface of the sound-deadening pad 502 is wavy. When the air current flows to the second channel on the upper surface of the silencing pad 502, although the flow velocity of the air current will be increased due to the reduction of the flow area, the energy of the air current will be effectively reduced due to the presence of the wavy protrusions, thereby reducing the noise generated when the flow velocity of the air current changes.

Further, the distance between the second orifice plate 5 and the bottom end of the silencing plate 402 is larger than the diameter of the first through hole 401, so that the airflow speed between the first orifice plate 4 and the second orifice plate 5 is prevented from changing too fast, and the generation of secondary noise is avoided.

The utility model discloses an application principle does: when the blower 6 is in operation, ambient air flows from the air inlet 1 into the conical transition region 101. Due to the obstruction in the middle of the first orifice plate 4, the air flow will be dispersed and pass through the first through holes 401 into the lower side of the first orifice plate 4. At this time, due to the guiding action of the silencing plate 402, the air flow will flow to the side near the silencing pad 502 and flow to the second through hole 501 along the upper surface of the silencing pad 502. At this time, although the air flow is accelerated due to the reduction of the flow area and the influence of the air flow approaching the blower 6, the energy of the air flow is rapidly consumed due to the wavy structure of the silencing pad 502, so that the noise of the air flow passing through the second through hole 501 is effectively reduced, and the air flow can stably come to the air outlet 3 and enter the blower 6.

The above is the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that any improvements and modifications to the present invention without departing from the principles of the present invention should also be considered within the scope of the present invention by those skilled in the art.

Claims

1. A silencer of a blower comprises a silencing cylinder body connected with the blower and is characterized in that, the silencing cylinder body is sequentially provided with an air inlet (1), a silencing channel (2) and an air outlet (3) from top to bottom, a first pore plate (4) and a second pore plate (5) which are parallel to each other are arranged in the silencing passage (2), first through holes (401) are arranged at the outer edge of the first pore plate (4), the upper end surface of the first pore plate (4) faces the air inlet (1), and a silencing plate (402) is arranged at the lower end surface, the second orifice plate (5) is arranged below the first orifice plate (4), the sound-absorbing plate (402) is located inside the arrangement position of the first through holes (401) and is used for guiding the air flow to the second orifice plate (5), the upper end face of the second pore plate (5) is provided with a silencing pad (502), and the middle of the second pore plate (5) is provided with a second through hole (501).

2. The blower muffler according to claim 1, wherein the muffling cylinder is cylindrical, the diameters of the air inlet (1) and the air outlet (3) are both smaller than the diameter of the muffling channel (2), and a tapered transition area (101) is provided between the air inlet (1) and the muffling channel (2).

3. The blower muffler according to claim 1, wherein the number of the first through holes (401) is at least four, and the first through holes (401) are uniformly distributed along a circumferential direction of the first orifice plate (4).

4. The blower muffler according to claim 3, wherein the sound-absorbing plate (402) is a circular cylindrical body, and a side of the sound-absorbing plate (402) adjacent to the first through hole (401) is beveled such that an upper end thickness of the sound-absorbing plate (402) is greater than a lower end thickness.

5. The blower muffler according to claim 4, wherein a distance between a bottom end of the sound-deadening plate (402) and an upper end surface of the second orifice plate (5) is larger than a diameter of the first through hole (401).

6. A blower muffler according to claim 3, characterized in that the total cross-sectional area of the first through holes (401) is smaller than or equal to the cross-sectional area of the second through holes (501).

7. The blower muffler according to claim 6, characterized in that the first through hole (401) is vertically offset from the air inlet opening (1).

8. The blower silencer according to any of claims 1-7, wherein the sound-absorbing panel (402) is made of glass wool, the sound-absorbing pad (502) is made of polyester sponge, and the sound-absorbing pad (502) is corrugated.