CN210239998U

CN210239998U - Noise elimination structure of low-noise oxidation fan

Info

Publication number: CN210239998U
Application number: CN201920690994.2U
Authority: CN
Inventors: Xiaojing Wang; 王孝景; Wentao Yang; 杨文涛; Jun Xiong; 熊俊; Kongbing Li; 黎孔兵; Youguo Su; 苏有国
Original assignee: Hubei Yihua Songzi Fertilizer Co ltd
Current assignee: Hubei Yihua Songzi Fertilizer Co ltd
Priority date: 2019-05-15
Filing date: 2019-05-15
Publication date: 2020-04-03
Anticipated expiration: 2029-05-15

Abstract

The utility model belongs to the technical field of fluid machinery equipment, especially, relate to a low noise oxidation fan noise-abatement structure. The exhaust muffler is connected with the exhaust port through a connecting flange; the left side of exhaust muffler is provided with one-stage pressure release horn mouth, and the right side of one-stage pressure release horn mouth is connected with switches on the straight tube, and the right side that switches on the straight tube is connected with two-stage pressure release horn mouth, wherein, the surface that switches on the straight tube be provided with the micropore baffle, and the outside welding that switches on the two-stage pressure release horn mouth of straight tube has the static pressure pouring jacket, the flange joint of the right side and the two-stage pressure release horn mouth right-hand member of static pressure pouring. The structure of the silencing exhaust port of the traditional oxidation fan is improved, the pressure relief bell mouth is matched with the static pressure box together, the air pulsation inside and outside the air outlet is buffered through the bell mouth, the air pressure is stabilized under the action of the static pressure box, and the noise is reduced.

Description

Noise elimination structure of low-noise oxidation fan

Technical Field

The utility model belongs to the technical field of fluid machinery equipment, especially, relate to a low noise oxidation fan noise-abatement structure.

Background

The Roots blower is a positive displacement blower, the delivered air quantity is proportional to the rotating speed, small gaps are always kept between the end face of the impeller and front and rear end covers of the blower and between the impellers of the blower, and the air is delivered to one side of the discharge from the air inlet of the blower along the inner wall of the shell under the drive of the synchronous gear. However, when low-pressure gas in the existing fan is contacted with high-pressure gas at the air outlet, no buffer exists, so that large gas pulsation is caused, and further large impact vibration and noise are generated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a simple structure, reasonable in design, convenient to use's low noise oxidation fan noise-abatement structure, it improves the structure of traditional oxidation fan noise-abatement gas vent, is in the same place pressure release horn mouth and static pressure case cooperation, through the inside and outside gas pulsation of horn mouth buffering air outlet to carry out gas steady voltage, noise reduction under the effect of static pressure case.

In order to achieve the above object, the utility model adopts the following technical scheme: the device comprises a Roots blower, a driving motor, an air inlet silencing pipe, an air outlet and an exhaust silencer; the exhaust silencer consists of a one-stage pressure relief bell mouth, a conduction straight pipe, a two-stage pressure relief bell mouth, a micropore partition plate and a static pressure sleeve box; the exhaust muffler is connected with the exhaust port through a connecting flange; the left side of exhaust muffler is provided with one-stage pressure release horn mouth, and the right side of one-stage pressure release horn mouth is connected with switches on the straight tube, and the right side that switches on the straight tube is connected with two-stage pressure release horn mouth, wherein, the surface that switches on the straight tube be provided with the micropore baffle, and the outside welding that switches on the two-stage pressure release horn mouth of straight tube has the static pressure pouring jacket, the flange joint of the right side and the two-stage pressure release horn mouth right-hand member of static pressure pouring.

Preferably, the inside of the one-stage pressure relief bell mouth is coated with a rough rubber gasket.

Preferably, the internal one-stage pressure relief bell mouth, the conduction straight pipe and the two-stage pressure relief bell mouth of the exhaust silencer keep the same length, and the length of each section is controlled to be-cm.

Preferably, the caliber of the one-stage pressure relief bell mouth is half of the caliber of the two-stage pressure relief bell mouth.

Preferably, the static pressure jacket box is formed by welding a hollow sandwich plate in a sealing manner.

After the structure is adopted, the utility model discloses beneficial effect does: a low noise oxidation fan noise-abatement structure, it improves the structure of traditional oxidation fan noise-abatement gas vent, with pressure release horn mouth and static pressure case cooperation together, through the inside and outside gas pulsation of horn mouth buffering air outlet to carry out gaseous steady voltage, noise reduction under the effect of static pressure case, the utility model has the advantages of simple structure, it is reasonable to set up, the cost of manufacture is low.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the exhaust muffler 5 of the present invention.

Fig. 3 is a schematic end view of the exhaust muffler 5 of the present invention.

Description of reference numerals:

the device comprises a Roots blower 1, a driving motor 2, an air inlet muffler 3, an exhaust port 4, an exhaust muffler 5, a one-stage pressure relief bell mouth 6, a conduction straight pipe 7, a two-stage pressure relief bell mouth 8, a micropore partition plate 9, a static pressure sleeve box 10 and a rubber gasket 11.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to fig. 3, the following technical solutions are adopted in the present embodiment: the device comprises a Roots blower 1, a driving motor 2, an air inlet silencing pipe 3, an air outlet 4 and an exhaust silencer 5; the exhaust muffler 5 consists of a first-stage pressure relief bell mouth 6, a conducting straight pipe 7, a second-stage pressure relief bell mouth 8, a micropore partition plate 9 and a static pressure jacket box 10; the exhaust muffler 5 is connected with the exhaust port 4 through a connecting flange; exhaust muffler 5's left side is provided with one-stage pressure release horn mouth 6, and one-stage pressure release horn mouth 6's right side is connected with switches on straight tube 7, and the right side that switches on straight tube 7 is connected with two-stage pressure release horn mouth 8, wherein, the surface that switches on straight tube 7 be provided with micropore baffle 9, and the outside welding that switches on two-stage pressure release horn mouth 8 of straight tube 7 has static pressure pouring jacket 10, the right side of static pressure pouring jacket 10 and the flange joint of two-stage pressure release horn mouth 8 right-hand members.

Wherein, the inside of the one-stage pressure relief bell mouth 6 is coated with a rough rubber gasket 11; the three parts of the first-stage pressure relief bell mouth 6, the conducting straight pipe 7 and the second-stage pressure relief bell mouth 8 in the exhaust muffler 5 keep the same length, and the length of each section is controlled to be 40-50 cm; the caliber of the first-stage pressure relief bell mouth 6 is half of the caliber of the second-stage pressure relief bell mouth 8; the static pressure jacket box 10 is formed by welding a hollow sandwich plate in a sealing way.

The working principle of the specific embodiment is as follows: firstly, air is fed through a Roots blower 1, and after high-pressure air is exhausted from an exhaust port 4, the high-pressure air is acted by a stage of pressure relief bell mouth 6, and under the cooperation of an inner wall rubber gasket 11, air pressure buffering and noise elimination treatment are realized; then, under the action of the conducting straight pipe 7 and the micropore partition plate 9, the buffered gas enters the static pressure jacket box 10 through the micropore partition plate 9 to realize pressure stabilization; finally, the pressure-stabilizing gas is output along with the exhaust of the two-stage pressure-relief bell mouth 8.

After adopting above-mentioned structure, this embodiment beneficial effect does: the structure of the silencing exhaust port of the traditional oxidation fan is improved, the pressure relief bell mouth is matched with the static pressure box together, the air pulsation inside and outside the air outlet is buffered through the bell mouth, the air pressure stabilization is carried out under the action of the static pressure box, and power is provided for long-distance conveying.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a low noise oxidation fan sound-absorbing structure which characterized in that: the device comprises a Roots blower (1), a driving motor (2), an air inlet silencing pipe (3), an air outlet (4) and an exhaust silencer (5); the exhaust muffler (5) consists of a first-stage pressure relief bell mouth (6), a conducting straight pipe (7), a second-stage pressure relief bell mouth (8), a micropore partition plate (9) and a static pressure jacket box (10); the exhaust muffler (5) is connected with the exhaust port (4) through a connecting flange; the left side of exhaust muffler (5) is provided with one-stage pressure release horn mouth (6), and the right side of one-stage pressure release horn mouth (6) is connected with switches on straight tube (7), and the right side that switches on straight tube (7) is connected with two-stage pressure release horn mouth (8), wherein, the surface that switches on straight tube (7) be provided with micropore baffle (9), and the outside welding that switches on two-stage pressure release horn mouth (8) of straight tube (7) has static pressure pouring jacket (10), the flange joint of the right side of static pressure pouring jacket (10) and two-stage pressure release horn mouth (8) right-hand member.

2. The noise elimination structure of the low-noise oxidation fan as set forth in claim 1, wherein: and a rough rubber gasket (11) is coated inside the one-stage pressure relief bell mouth (6).

3. The noise elimination structure of the low-noise oxidation fan as set forth in claim 1, wherein: the three parts of the first-stage pressure relief bell mouth (6), the conducting straight pipe (7) and the second-stage pressure relief bell mouth (8) in the exhaust muffler (5) keep the same length, and the length of each section is controlled to be 40-50 cm.

4. The noise elimination structure of the low-noise oxidation fan as set forth in claim 1, wherein: the caliber of the first-stage pressure relief bell mouth (6) is half of the caliber of the second-stage pressure relief bell mouth (8).

5. The noise elimination structure of the low-noise oxidation fan as set forth in claim 1, wherein: the static pressure jacket box (10) is formed by welding a hollow sandwich plate in a sealing way.