CN113738706A - Anti-surge muffler device for vacuum pump system - Google Patents
Anti-surge muffler device for vacuum pump system Download PDFInfo
- Publication number
- CN113738706A CN113738706A CN202111103105.6A CN202111103105A CN113738706A CN 113738706 A CN113738706 A CN 113738706A CN 202111103105 A CN202111103105 A CN 202111103105A CN 113738706 A CN113738706 A CN 113738706A
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- Prior art keywords
- baffle
- throttle
- stage
- vacuum pump
- pump system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses an anti-surge noise elimination device for a vacuum pump system, which comprises a connecting flange and a bent pipe, wherein one end of the bent pipe is communicated with an anti-surge valve arranged on the vacuum pump system, the other end of the bent pipe is provided with an air inlet noise elimination assembly, the air inlet noise elimination assembly comprises a first-stage throttling baffle and a second-stage throttling baffle which are sequentially arranged along the air inlet direction, a first-stage throttling depressurization section is formed between the first-stage throttling baffle and the second-stage throttling baffle, a second-stage throttling depressurization section is formed between the second-stage throttling baffle and the bent pipe, and gas sequentially passes through the first-stage throttling baffle, the first-stage throttling depressurization section, the second-stage throttling baffle and the second-stage throttling depressurization section, and enters the anti-surge valve after being subjected to speed reduction and noise elimination; based on the two-stage throttling decompression and resistive silencing principle, the invention effectively reduces the turbulent noise of high-pressure and high-flow-speed airflow, has wide noise reduction frequency band and strong adaptability, has good noise reduction effect on low-frequency, medium-frequency and high-frequency noise, and has a throttling convergent and divergent structure, thereby being beneficial to balancing the pressure change in a vacuum pump system and avoiding the severe surging damage of an impeller.
Description
Technical Field
The invention relates to the technical field of noise reduction and noise elimination, in particular to an anti-surge noise elimination device for a vacuum pump system.
Background
When the vacuum pump system is in operation, when the vacuum degree is too high, gas can enter the vacuum system to avoid surging by opening an anti-surging valve arranged on a steam-water separator. Due to the fact that high-speed gas enters instantaneously, large airflow noise exists, the fact that high air pressure released by the anti-surge valve influences an air pressure field in the volute is avoided, and air pressure in the vacuum pump system is effectively balanced. The noise of the high-speed airflow of the instant air intake is effectively eliminated.
The existing anti-surge valve is lack of a noise elimination device, when the anti-surge valve is opened, large airflow noise is generated, and the impeller is impacted due to sudden change of internal pressure and external pressure, so that the impeller is easily damaged.
Disclosure of Invention
The technical purpose is as follows: the invention discloses an anti-surge muffler device of a vacuum pump system, which aims at overcoming the defects that the opening noise of a surge valve of the existing vacuum pump is large and gas impacts an impeller and performs intake muffler of the surge valve and balances the pressure change in the vacuum pump system.
The technical scheme is as follows: in order to achieve the technical purpose, the invention adopts the following technical scheme:
the utility model provides a vacuum pump system's anti-surge noise eliminator, including flange and return bend, return bend one end and the anti-surge valve intercommunication of setting on vacuum pump system, the other end sets up the noise elimination subassembly of admitting air, the noise elimination subassembly of admitting air includes sets gradually the one-level throttle baffle along the direction of admitting air, the second grade throttle baffle, form one-level throttle depressurization section between one-level throttle baffle and second grade throttle baffle, form second grade throttle depressurization section between second grade throttle baffle and return bend, gas passes through the one-level throttle baffle in proper order, one-level throttle depressurization section, the second grade throttle baffle, second grade throttle depressurization section, get into the anti-surge valve after the deceleration noise elimination.
Preferably, the first-stage throttling baffle and the second-stage throttling baffle both adopt tubular structures, a tubular body formed by the second-stage throttling baffle is concentrically positioned in a tubular body formed by the first-stage throttling baffle, the first-stage throttling depressurization section is positioned between the inner wall of the first-stage throttling baffle and the outer wall of the second-stage throttling baffle, one end of the bent pipe close to the air inlet silencing assembly is provided with a fixing plate for fixing the first-stage throttling baffle and the second-stage throttling baffle, the center of the fixing plate is provided with an opening for communicating the second-stage throttling baffle with the bent pipe, the overlapped part of the fixing plate and the first-stage throttling depressurization section adopts a closed structure, and air flows into the second-stage throttling baffle from the first-stage throttling depressurization section and flows into the bent pipe from the opening in the center of the fixing plate.
Preferably, the primary throttling baffle and the secondary throttling baffle both adopt a perforation structure, the perforation aperture of the primary throttling baffle is 5 mm-20 mm, and the perforation rate is 5% -20%.
Preferably, the hole diameter of the secondary throttling baffle is 1-15 mm, and the punching rate is 1-15%.
Preferably, the inner wall of the elbow pipe is sequentially provided with a perforated protective layer and a sound absorption layer from inside to outside, and the sound absorption layer is tightly pressed on the inner wall of the elbow pipe by the perforated protective layer.
Preferably, the perforated protective surface layer provided by the invention is made of aluminum alloy and galvanized sheet, the perforation rate is 5-40%, the aperture is 0.1-15 mm, the hole spacing is 1-20 mm, and the thickness of the perforated protective surface layer is 0.5-5 mm.
Preferably, the sound absorption layer of the invention is made of porous sound absorption material, and comprises superfine glass wool and polyurethane foam plastic, the thickness of the sound absorption layer is 20 mm-150 mm, and the volume weight is 20kg/m3~50kg/m3The moisture content is 0.2% -3%, the mass moisture absorption rate is 2% -8%, and the hydrophobic rate is more than or equal to 98%.
Has the advantages that: the anti-surge muffler device for the vacuum pump system has the following beneficial effects:
1. the invention is based on the two-stage throttling decompression and resistive silencing principle, effectively reduces the turbulent noise of high-pressure and high-flow-speed airflow, has wide noise reduction frequency band and strong adaptability, and solves the problem of huge noise when the anti-surge valve of the vacuum pump is opened.
2. The invention has good noise reduction effect on low, medium and high frequency band noise through the perforation structure design.
3. The invention is beneficial to balancing the pressure change in the vacuum pump system, reducing the impact of the inlet air on the impeller and avoiding the severe surging and damage of the impeller by the throttling reducing and expanding structure of the two-stage throttling pressure reducing section.
4. The invention has simple structure, small volume and convenient installation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an internal structural view of the present invention;
wherein, 1-connecting flange, 2-elbow, 3-first class throttle baffle, 4-second class throttle baffle, 5-first class throttle depressurization section, 6-second class throttle depressurization section, 7-fixed plate.
Detailed Description
The present invention will be more clearly and completely described below by way of a preferred embodiment in conjunction with the accompanying drawings, without thereby limiting the scope of the invention to the described embodiment.
As shown in fig. 1 and 2, the anti-surge muffler device for a vacuum pump system disclosed by the invention comprises a connecting flange 1 and a bent pipe 2, wherein one end of the bent pipe 2 is communicated with an anti-surge valve arranged on the vacuum pump system, the other end of the bent pipe is provided with an air inlet muffler assembly, the air inlet muffler assembly comprises a first-stage throttle baffle 3 and a second-stage throttle baffle 4 which are sequentially arranged along an air inlet direction, a first-stage throttle pressure reducing section 5 is formed between the first-stage throttle baffle 3 and the second-stage throttle baffle 4, a second-stage throttle pressure reducing section 6 is formed between the second-stage throttle baffle 4 and the bent pipe 2, and air sequentially passes through the first-stage throttle baffle 3, the first-stage throttle pressure reducing section 5, the second-stage throttle baffle 4 and the second-stage throttle pressure reducing section 6, and enters the anti-surge valve after speed reduction and noise elimination.
The primary throttle baffle 3 and the secondary throttle baffle 4 both adopt tubular structures, a tubular body formed by the secondary throttle baffle 4 is concentrically positioned in a tubular body formed by the primary throttle baffle 3, a primary throttle depressurization section 5 is positioned between the inner wall of the primary throttle baffle 3 and the outer wall of the secondary throttle baffle 4, a fixed plate 7 for fixing the primary throttle baffle 3 and the secondary throttle baffle 4 is arranged at one end of a bent pipe 2 close to an air inlet noise elimination component, an opening for communicating the secondary throttle baffle 4 with the bent pipe is formed in the center of the fixed plate 7, a closed structure is adopted at the overlapped part of the fixed plate 7 and the primary throttle depressurization section 5, air flows into the secondary throttle baffle 4 from the primary throttle depressurization section 5, flows into the bent pipe 2 from the opening in the center of the fixed plate 7, high-speed air flow after secondary throttle depressurization enters a vacuum pump system through the bent pipe, the primary throttle baffle 3 and the secondary throttle baffle 4 eliminate noise except for air inlet noise, the air inlet speed is mainly reduced, and severe impact on the impeller and damage to the impeller are avoided.
According to the invention, the primary throttle baffle 3 and the secondary throttle baffle 4 both adopt a perforated structure, the pressure of the discharged air can be effectively reduced by perforation, and the perforation aperture of the primary throttle baffle 3 for eliminating high-speed airflow noise is 5-20 mm, preferably 8 mm; the perforation rate is 5% -20%, and the preferable rate is 10%; the aperture of a through hole of the secondary throttling baffle 4 is 1 mm-15 mm, preferably 5 mm; the perforation rate is 1% -15%, and the preferable rate is 5%.
According to the invention, the inner wall of the elbow pipe 2 is sequentially provided with the perforated protective surface layer and the sound absorption layer from inside to outside, the sound absorption layer is tightly pressed on the inner wall of the elbow pipe by the perforated protective surface layer to form a resistive noise elimination section, the perforated protective surface layer is made of aluminum alloy and galvanized plate, and the perforation rate is 5-40%, preferably 15%; the aperture is 0.1 mm-15 mm, preferably 1.5 mm; the hole spacing is 1 mm-20 mm, preferably 3 mm; the thickness of the perforated protective layer is 0.5 mm-5 mm, preferably 1.5 mm; the sound absorption layer is made of porous sound absorption materials and comprises superfine glass wool and polyurethane foam plastics, and the thickness of the sound absorption layer is 20 mm-150 mm, preferably 50 mm; the volume weight is 20kg/m3~50kg/m3Preferably 36kg/m3(ii) a The water content is 0.2% -3%, and the preferable water content is 0.5%; the mass moisture absorption rate is 2% -8%, and the preferential rate is 2.5%; the hydrophobic rate is more than or equal to 98 percent, the flow resistance is proper, the pores are uniform, and the sound absorption performance and the chemical stability are higher.
When the anti-surge silencer for the vacuum pump system is used, the silencer is communicated with an air inlet end of an anti-surge valve through a connecting flange, when the vacuum degree is overlarge, the anti-surge valve arranged on a steam-water separator of the vacuum pump system is opened, air in the environment enters from a first-stage throttling baffle 3, high-pressure air flows pass through a first-stage throttling depressurization section 5, the high-pressure air flows enter a second-stage throttling baffle 4 after being subjected to primary depressurization, the air flows pass through the second-stage throttling baffle 4 enter a second-stage throttling depressurization section 6, the high-speed air flows after being subjected to secondary throttling depressurization enter a bent pipe from an opening in the center of a fixing plate 7, and the high-speed air flows enter the vacuum pump system after being subjected to secondary silencing through a resistive silencing section of the bent pipe; the gradual-shrinkage structure from the first-stage throttling pressure reduction section 5 to the second-stage throttling pressure reduction section 6 and the gradual-drawing structure from the second-stage throttling pressure reduction section 6 to the elbow pipe 2, which are formed by the air inlet silencing component, solve the problem of air inlet silencing, reduce the gas flow rate, and avoid the damage of an impeller when the pressure in a shell of the balance vacuum pump is changed.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (7)
1. The utility model provides an anti-surge noise eliminator for vacuum pump system, a serial communication port, including flange (1) and return bend (2), return bend (2) one end and the anti-surge valve intercommunication of setting on vacuum pump system, the other end sets up the noise elimination subassembly of admitting air, the noise elimination subassembly of admitting air includes along the direction of admitting air set gradually one-level throttle baffle (3), second grade throttle baffle (4), form one-level throttle step-down section (5) between one-level throttle baffle (3) and second grade throttle baffle (4), form second grade throttle step-down section (6) between second grade throttle baffle (4) and return bend (2), gas passes through one-level throttle baffle (3) in proper order, one-level throttle step-down section (5), second grade throttle baffle (4), second grade throttle step-down section (6), get into the anti-surge valve after the noise elimination of slowing down.
2. The surge-proof muffler device for the vacuum pump system according to claim 1, wherein the first-stage throttle baffle (3) and the second-stage throttle baffle (4) both have a tubular structure, the tubular body formed by the second-stage throttle baffle (4) is concentrically located in the tubular body formed by the first-stage throttle baffle (3), the first-stage throttle pressure reduction section (5) is located between the inner wall of the first-stage throttle baffle (3) and the outer wall of the second-stage throttle baffle (4), the bent pipe (2) is provided with a fixing plate (7) for fixing the first-stage throttle baffle (3) and the second-stage throttle baffle (4) at one end close to the intake muffler assembly, the fixing plate (7) is provided with an opening at the center for communicating the second-stage throttle baffle (4) and the bent pipe, the overlapping portion of the fixing plate (7) and the first-stage throttle pressure reduction section (5) has a closed structure, and gas flows into the second-stage throttle baffle (4) from the first-stage throttle pressure reduction section (5), flows into the elbow pipe (2) from an opening at the center of the fixing plate (7).
3. The surge-proof silencer for the vacuum pump system according to claim 1, wherein the primary throttle baffle (3) and the secondary throttle baffle (4) both adopt a perforated structure, the perforated aperture of the primary throttle baffle (3) is 5 mm-20 mm, and the perforation rate is 5% to 20%.
4. The surge-proof muffler device for a vacuum pump system as claimed in claim 3, wherein the secondary throttle baffle (4) has a perforation aperture of 1mm to 15mm and a perforation rate of 1% to 15%.
5. The surge-proof muffler device for a vacuum pump system as claimed in claim 1, wherein the inner wall of the bent pipe (2) is provided with a perforated facing layer and a sound-absorbing layer in this order from inside to outside, the perforated facing layer pressing the sound-absorbing layer against the inner wall of the bent pipe.
6. The surge-proof muffler device for a vacuum pump system as claimed in claim 5, wherein the perforated facing layer is made of aluminum alloy or galvanized sheet, the perforation rate is 5% to 40%, the aperture is 0.1mm to 15mm, the hole pitch is 1mm to 20mm, and the thickness of the perforated facing layer is 0.5mm to 5 mm.
7. The surge-proof muffler device for a vacuum pump system as claimed in claim 5, wherein the sound absorption layer is made of porous sound absorption material, including ultra-fine glass wool and polyurethane foam, and has a thickness of 20 mm-150 mm and a volume weight of 20kg/m3~50kg/m3The moisture content is 0.2% -3%, the mass moisture absorption rate is 2% -8%, and the hydrophobic rate is more than or equal to 98%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111103105.6A CN113738706B (en) | 2021-09-18 | 2021-09-18 | Anti-surge muffler device for vacuum pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111103105.6A CN113738706B (en) | 2021-09-18 | 2021-09-18 | Anti-surge muffler device for vacuum pump system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113738706A true CN113738706A (en) | 2021-12-03 |
| CN113738706B CN113738706B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111103105.6A Active CN113738706B (en) | 2021-09-18 | 2021-09-18 | Anti-surge muffler device for vacuum pump system |
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| CN (1) | CN113738706B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979587A (en) * | 1989-08-01 | 1990-12-25 | The Boeing Company | Jet engine noise suppressor |
| CN201179406Y (en) * | 2008-04-15 | 2009-01-14 | 苏州苏净保护气氛有限公司 | Air discharge emptying silencer muffler |
| US20110186376A1 (en) * | 2010-02-02 | 2011-08-04 | E.I. Du Pont De Nemours And Company | Muffler with integrated catalytic converter and polymeric muffler body |
| CN203114751U (en) * | 2013-02-01 | 2013-08-07 | 中国航空工业集团公司西安飞机设计研究所 | Integrated noise reduction device for vacuum pump |
| CN203311840U (en) * | 2013-05-06 | 2013-11-27 | 杭州鼎岳空分设备有限公司 | Straight-line silencer for air separation device exhaust system |
| CN108561289A (en) * | 2018-03-06 | 2018-09-21 | 安徽朝祯环保科技有限公司 | A kind of exhaust silencer |
| CN111255975A (en) * | 2020-02-24 | 2020-06-09 | 马鞍山钢铁股份有限公司 | Blast furnace fan air discharge pipe noise reduction and vibration damping device and manufacturing method and blast furnace fan system |
| US20200224893A1 (en) * | 2017-08-09 | 2020-07-16 | Carrier Corporation | A muffler for a refrigeration system and the refrigeration system |
| CN211648607U (en) * | 2020-01-02 | 2020-10-09 | 振欣透平机械有限公司 | Subassembly is prevented breathing heavily by turbine vacuum pump bypass |
| CN212225615U (en) * | 2020-06-02 | 2020-12-25 | 亿昇(天津)科技有限公司 | Magnetic suspension vacuum pump anti-surge valve muffler |
-
2021
- 2021-09-18 CN CN202111103105.6A patent/CN113738706B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979587A (en) * | 1989-08-01 | 1990-12-25 | The Boeing Company | Jet engine noise suppressor |
| CN201179406Y (en) * | 2008-04-15 | 2009-01-14 | 苏州苏净保护气氛有限公司 | Air discharge emptying silencer muffler |
| US20110186376A1 (en) * | 2010-02-02 | 2011-08-04 | E.I. Du Pont De Nemours And Company | Muffler with integrated catalytic converter and polymeric muffler body |
| CN203114751U (en) * | 2013-02-01 | 2013-08-07 | 中国航空工业集团公司西安飞机设计研究所 | Integrated noise reduction device for vacuum pump |
| CN203311840U (en) * | 2013-05-06 | 2013-11-27 | 杭州鼎岳空分设备有限公司 | Straight-line silencer for air separation device exhaust system |
| US20200224893A1 (en) * | 2017-08-09 | 2020-07-16 | Carrier Corporation | A muffler for a refrigeration system and the refrigeration system |
| CN108561289A (en) * | 2018-03-06 | 2018-09-21 | 安徽朝祯环保科技有限公司 | A kind of exhaust silencer |
| CN211648607U (en) * | 2020-01-02 | 2020-10-09 | 振欣透平机械有限公司 | Subassembly is prevented breathing heavily by turbine vacuum pump bypass |
| CN111255975A (en) * | 2020-02-24 | 2020-06-09 | 马鞍山钢铁股份有限公司 | Blast furnace fan air discharge pipe noise reduction and vibration damping device and manufacturing method and blast furnace fan system |
| CN212225615U (en) * | 2020-06-02 | 2020-12-25 | 亿昇(天津)科技有限公司 | Magnetic suspension vacuum pump anti-surge valve muffler |
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| Publication number | Publication date |
|---|---|
| CN113738706B (en) | 2024-02-13 |
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