CN201377408Y - Combined muffler suitable for dry vacuum pump - Google Patents
Combined muffler suitable for dry vacuum pump Download PDFInfo
- Publication number
- CN201377408Y CN201377408Y CN200920116770U CN200920116770U CN201377408Y CN 201377408 Y CN201377408 Y CN 201377408Y CN 200920116770 U CN200920116770 U CN 200920116770U CN 200920116770 U CN200920116770 U CN 200920116770U CN 201377408 Y CN201377408 Y CN 201377408Y
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- vacuum pump
- pipe
- outer tube
- dry vacuum
- applicable
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- Expired - Fee Related
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- Details Of Valves (AREA)
- Reciprocating Pumps (AREA)
Abstract
The utility model provides a combined muffler suitable for a dry vacuum pump, which solves the technical problems that the prior muffler only can eliminate the high-frequency noise and is hard to weaken the middle-frequency noise and the low-frequency noise. The combined muffler comprises an outer tube; a tube mouth for connecting the vacuum pump at one end of the outer tube is a front tube mouth, and a tube mouth at the other end is a rear tube mouth; an inner tube is sleeved in the outer tube; a through hole is formed on the tube wall of the inner tube; an auxiliary sound absorbing lining is arranged between the inner tube and the outer tube; and an one-way valve is arranged at the front tube mouth of the outer tube. The muffler not only can eliminate the high-frequency noise, but also can weaken the middle-frequency noise and the low-frequency noise, thereby creating favorable working environment for operators.
Description
Technical field
The utility model relates to a kind of silencing apparatus, mainly is applicable to the operating noise of eliminating or weakening dry vacuum pump.
Background technique
Vacuum pump is to utilize methods such as machinery, physics, chemistry, physical chemistry that container is bled, obtaining and to keep the device of vacuum, thereby satisfy usage requirements such as vacuum evaporation, vacuum concentration, vacuum conditioning, vacuum impregnation, vacuum drying and vacuum smelting.The kind of vacuum pump is a lot, as liquid-ring vacuum pump, oil seal pump, dry vacuum pump, water injection vacuum pump etc., because dry vacuum pump makes does not have working solution in the swept volume (as fluids such as oil, water or other polymer), not only strengthened the reliability of pump, and it is more durable, pollute still less, overall performance is higher.In order constantly to improve the dry vacuum pump structure, make it obtain using more at large, the operating noise that improves it is the problem that must solve.Pipe and outer tube in existing silencing apparatus comprises, the tube wall of interior pipe has through hole, fill acoustical cotton between interior pipe and the outer tube, the through hole that makes noise pass interior pipe contacts with acoustical cotton, though this structure is simple, but it can only eliminate high-frequency noise, and in being difficult to weaken, low-frequency noise, make the operator that are under this operating environment still be subjected to interference of noise.
Summary of the invention
The purpose of this utility model is at the deficiencies in the prior art, provides a kind of and can not only eliminate high-frequency noise, and the medium and low frequency noise of can also decaying, thus form the combined type silencing apparatus that is applicable to dry vacuum pump of a good working environment.
The purpose of this utility model can realize by following technical proposal: a kind of combined type silencing apparatus that is applicable to dry vacuum pump, comprise outer tube, the mouth of pipe that a wherein end of outer tube is used to connect vacuum pump is the front end mouth of pipe, the other end mouth of pipe is the rear end mouth of pipe, pipe in the suit is shaped on through hole on the tube wall of interior pipe in the outer tube, is provided with the auxilliary lining of sound absorption between interior pipe and the outer tube, it is characterized in that the front end mouth of pipe of described outer tube is provided with one-way valve.
This combined type silencing apparatus mainly is applicable to dry vacuum pump, except adopting sound absorption auxilliary lining noise reduction (generally being) at high-frequency noise, also be provided with one-way valve at the front end mouth of pipe of outer tube (promptly between the relief opening of pipe and dry vacuum pump), one-way valve is mainly used in decay medium and low frequency noise, when one-way valve is in closed condition, interior pipe is blocked with the relief opening of dry vacuum pump, when one-way valve is in open mode, interior pipe communicates with the relief opening of dry vacuum pump, concrete noise reduction process is such: when the inlet pressure of dry vacuum pump increases, one-way valve is opened, pipe communicates with the relief opening of dry vacuum pump in making, noise from the dry vacuum pump exhaust inlet enters in the interior pipe, the keying of one-way valve depends primarily on the inlet pressure of dry vacuum pump, the inlet pressure that is dry vacuum pump is big more, the aperture of one-way valve is also big more, otherwise, the inlet pressure of dry vacuum pump is more little, the aperture of one-way valve is also more little, noise behind the process one-way valve noise reduction is by behind the through hole of interior pipe, contact with the auxilliary lining of sound absorption, the energy that the auxilliary lining of sound absorption consumes sound wave reaches the effect of noise reduction, medium-high frequency had good noise elimination effect, and residual noise is discharged from the rear end mouth of pipe of outer tube, and last sound wave of discharging can not constitute operator and disturbed.
In the above-mentioned combined type silencing apparatus that is applicable to dry vacuum pump, described one-way valve comprises the swing valve plate that seals mutually with the front end mouth of pipe of outer tube, and the upper inside wall of a side margin of swing valve plate and the front end mouth of pipe of outer tube is hinged.Under the promotion of pressure, the swing valve plate can promptly be realized folding along front-end face beat in outer tube of outer tube, and after pressure reduced, the swing valve plate relied on gravity reduction, and therefore, this one-way valve mainly is applicable to horizontal type dry vacuum pump.
In the above-mentioned combined type silencing apparatus that is applicable to dry vacuum pump, described hinged be that hinge connects or hinge connects.
As another kind of scheme, in the above-mentioned combined type silencing apparatus that is applicable to dry vacuum pump, described one-way valve comprises the mobile valve plate that seals mutually with the front end mouth of pipe of outer tube, and the rear side of mobile valve plate is slide blocks fixedly; Affixed pressure strip in the outer tube, the middle part of pressure strip is shaped on loose slot, and loose slot matches with slide blocks, mounting spring between pressure strip and the mobile valve plate.When the inlet pressure of dry vacuum pump during greater than the pressure in the outer tube, impel mobile valve plate to move backward, at this moment, the front end mouth of pipe of outer tube is opened, and it is mobile backward along the loose slot of pressure strip that mobile valve plate promotes slide blocks, simultaneously, spring is compressed, after the inlet pressure of dry vacuum pump reduced, mobile valve plate resetted under the effect of spring, and this one-way valve all is suitable for for horizontal, vertical dry vacuum pump.
In the above-mentioned combined type silencing apparatus that is applicable to dry vacuum pump, between the sliding-groove of described slide blocks and pressure strip guide sleeve is installed.Guide sleeve can lead to slide blocks, makes slide blocks operate steadily.
In the above-mentioned combined type silencing apparatus that is applicable to dry vacuum pump, the middle part of described slide blocks is provided with limiting stopper, and limiting stopper contacts with pressure strip.Limiting stopper can prevent that mobile valve plate from influencing anti-acoustic capability because of unrestricted moving.
In the above-mentioned combined type silencing apparatus that is applicable to dry vacuum pump, the rear end mouth of pipe of described outer tube is sealed mutually by muffler plate.Muffler plate can play noise reduction effect once more, further strengthens the noise elimination effect.
In the above-mentioned combined type silencing apparatus that is applicable to dry vacuum pump, the auxilliary lining of described sound absorption is glass wool or foamed aluminium.
Compared with prior art, the combined type silencing apparatus that originally is applicable to dry vacuum pump has the following advantages:
1, this silencing apparatus is provided with one-way valve at the front end mouth of pipe of outer tube, and the annoying low-frequency noise that can decay has been eliminated noise interference greatly, has created the operating environment of a quietness for operator;
2, the one-way valve of this silencing apparatus has two kinds of structural types, and a kind of is that the swing valve plate is rotary, and another kind is a movement of valve leaf spring compact type, all is applicable to various occasions horizontal, vertical dry vacuum pump, has wide range of applications;
3, this silencing apparatus also is provided with muffler plate at the rear end of the outer tube mouth of pipe, can further play the noise reduction effect, strengthens the noise elimination effect, and the sound wave of last discharge almost can be ignored.
Description of drawings
Fig. 1 is the cross-sectional schematic that the utility model is applicable to first kind of embodiment of combined type silencing apparatus of dry vacuum pump;
Fig. 2 is the cross-sectional schematic that the utility model is applicable to second kind of embodiment of combined type silencing apparatus of dry vacuum pump.
Among the figure, 1, outer tube; 11, the front end mouth of pipe of outer tube; 15, the rear end mouth of pipe of outer tube; 2, interior pipe; 21, through hole; 3, the auxilliary lining of sound absorption; 4, swing valve plate; 6, mobile valve plate; 7, slide blocks; 8, pressure strip; 81, loose slot; 9, spring; 10, guide sleeve; 12, muffler plate; 13, limiting stopper; 18, end cap.
Embodiment
Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As shown in Figure 1, originally be applicable to the combined type silencing apparatus of dry vacuum pump, comprise outer tube 1, the mouth of pipe that a wherein end of outer tube 1 is used to connect vacuum pump is the front end mouth of pipe 11, the other end mouth of pipe is the rear end mouth of pipe 15, the fastening end cap 18 of the front-end face of outer tube 1, end cap 18 is communicated with the relief opening of dry vacuum pump, pipe 2 in the suit in the outer tube 1, be shaped on equally distributed micro-through-hole 21 on the tube wall of interior pipe 2, pipe 2 communicates with outer tube 1 in making, be provided with the auxilliary lining 3 of sound absorption between interior pipe 2 and the outer tube 1, as glass wool, foamed aluminium etc., in pipe 2 communicate with the relief opening of dry vacuum pump, upper inside wall at end cap 18 is hinged (can to adopt hinge, hinge etc.) upper edge of swing valve plate 4, swing valve plate 4 seals mutually with the opening of end cap 18, the front end mouth of pipe 11 rear portions of outer tube 1 are provided with can be for the space of swing valve plate 4 motions, during work, under the effect of dry vacuum pump inlet pressure, swing valve plate 4 is along front-end face beat in outer tube 1 of outer tube 1, promptly realize folding, after inlet pressure reduces, swing valve plate 4 relies on gravity reduction, therefore, this one-way valve structures mainly is applicable to horizontal type dry vacuum pump, in addition, also be provided with muffler plate 12 at the rear end of outer tube 1 mouth of pipe 15, can further strengthen noise reduction.
Shown in Figure 2 is the combined type silencing apparatus that another kind is applicable to dry vacuum pump, has wherein adopted the one-way valve of the medium and low frequency noise that is used between the relief opening of pipe and dry vacuum pump in another kind of being located to decay.This one-way valve can replace the swing valve plate 4 among Fig. 1, its concrete structure is: affixed pressure strip 8 in shell 1, the middle part of pressure strip 8 is shaped on loose slot 81, affixed guide sleeve 10 in the loose slot 81, be provided with a slide blocks 7 in the guide sleeve 10, slide blocks 7 can move forward and backward along the inwall of guide sleeve 10, the middle part fixed limit piece 13 of slide blocks 7, when slide blocks 7 moves a certain distance backward, limiting stopper 13 is collided with pressure strip 8, the front portion of slide blocks 7 connects mobile valve plate 6, when dry vacuum pump did not start, mobile valve plate 6 sealed mutually with the opening of end cap 18, the slide blocks 7 outer springs 9 that are with, the two ends of spring 9 are connected with pressure strip 8 with mobile valve plate 6 respectively, and spring 9 helps mobile valve plate 6 and resets.
Originally the concrete noise reduction process that is applicable to the combined type silencing apparatus of dry vacuum pump is such: when the inlet pressure of dry vacuum pump increases, make swing valve plate 4 beat several angle or mobile valve plate 6 is moved a certain distance backward backward, at this moment pipe 2 communicates with the relief opening of dry vacuum pump in, manage in 2 in the noise of relief opening enters, aperture between swing valve plate 4 and mobile valve plate 6 and the end cap 18 depends on the inlet pressure of dry vacuum pump, be that it diminishes along with the reduction of inlet pressure, inlet pressure raises and becomes big, thereby the medium and low frequency noise of decay vacuum pump, noise behind the process one-way valve noise reduction is by behind the micro-through-hole 21 of interior pipe 2, contact with the auxilliary lining 3 of sound absorption, the energy that the auxilliary lining of sound absorption consumes sound wave reaches the effect of noise reduction, medium-high frequency had good noise elimination effect, and remaining noise at last the muffler plate 12 of the rear end mouth of pipe 15 by outer tube 1 carry out noise reduction for the third time, at this moment, the sound wave that comes out from muffler plate 12 has remained little, get rid of interference, created the operating environment of a quietness for operator.
Claims (8)
1, a kind of combined type silencing apparatus that is applicable to dry vacuum pump, comprise outer tube (1), the mouth of pipe that a wherein end of outer tube (1) is used to connect vacuum pump is the front end mouth of pipe (11), the other end mouth of pipe is the rear end mouth of pipe (15), pipe (2) is shaped on through hole (21) in the interior suit of outer tube (1) on the tube wall of interior pipe (2), is provided with the auxilliary lining of sound absorption (3) between interior pipe (2) and the outer tube (1), it is characterized in that the front end mouth of pipe (11) of described outer tube (1) is provided with one-way valve.
2, the combined type silencing apparatus that is applicable to dry vacuum pump according to claim 1, it is characterized in that, described one-way valve comprises the swing valve plate (4) that seals mutually with the front end mouth of pipe (11) of outer tube (1), and the upper inside wall of a side margin of swing valve plate (4) and the front end mouth of pipe (11) of outer tube (1) is hinged.
3, the combined type silencing apparatus that is applicable to dry vacuum pump according to claim 2 is characterized in that, described hinged be that hinge connects or hinge connects.
4, the combined type silencing apparatus that is applicable to dry vacuum pump according to claim 1, it is characterized in that, described one-way valve comprises the mobile valve plate (6) that seals mutually with the front end mouth of pipe (11) of outer tube (1), and the rear side of mobile valve plate (6) is slide blocks (7) fixedly; Affixed pressure strip (8) in the outer tube (1), the middle part of pressure strip (8) is shaped on loose slot (81), and loose slot (81) matches with slide blocks (7), mounting spring (9) between pressure strip (8) and the mobile valve plate (6).
5, the combined type silencing apparatus that is applicable to dry vacuum pump according to claim 4 is characterized in that, between the sliding-groove (81) of described slide blocks (7) and pressure strip (8) guide sleeve (10) is installed.
6, the combined type silencing apparatus that is applicable to dry vacuum pump according to claim 4 is characterized in that, the middle part of described slide blocks (7) is provided with limiting stopper (71), and limiting stopper (71) contacts with pressure strip (8).
7, according to any described combined type silencing apparatus that is applicable to dry vacuum pump among the claim 1-6, it is characterized in that the rear end mouth of pipe (15) of described outer tube (1) is sealed mutually by muffler plate (12).
According to any described combined type silencing apparatus that is applicable to dry vacuum pump among the claim 1-6, it is characterized in that 8, the auxilliary lining of described sound absorption (3) is glass wool or foamed aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920116770U CN201377408Y (en) | 2009-03-31 | 2009-03-31 | Combined muffler suitable for dry vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920116770U CN201377408Y (en) | 2009-03-31 | 2009-03-31 | Combined muffler suitable for dry vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201377408Y true CN201377408Y (en) | 2010-01-06 |
Family
ID=41517516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920116770U Expired - Fee Related CN201377408Y (en) | 2009-03-31 | 2009-03-31 | Combined muffler suitable for dry vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201377408Y (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104963826A (en) * | 2015-07-10 | 2015-10-07 | 中国检验检疫科学研究院 | Noise reduction instrument of mechanical pump |
| CN105836305A (en) * | 2016-06-08 | 2016-08-10 | 杜海峰 | Self-mixing blend oil packaging container |
| EP3055597A4 (en) * | 2013-10-08 | 2017-06-07 | Dayco IP Holdings, LLC | Noise attenuation in a check valve unit or apparatus for producing vacuum |
| CN107956673A (en) * | 2017-11-21 | 2018-04-24 | 浙江工贸职业技术学院 | A kind of Muffling vibration absorber |
| US10024339B2 (en) | 2014-05-30 | 2018-07-17 | Dayco Ip Holdings, Llc | Vacuum creation system having an ejector, pneumatic control valve and optionally an aspirator |
| US10024458B2 (en) | 2014-04-04 | 2018-07-17 | Dayco Ip Holdings, Llc | Bypass check valve and venturi devices having the same |
| US10100720B2 (en) | 2015-01-09 | 2018-10-16 | Dayco Ip Holdings, Llc | Crankcase ventilating evacuator |
| US10107240B2 (en) | 2014-04-04 | 2018-10-23 | Dayco Ip Holdings, Llc | Check valves and Venturi devices having the same |
| CN109695559A (en) * | 2019-02-26 | 2019-04-30 | 吉利汽车研究院（宁波）有限公司 | A kind of vacuum pump denoising device and vacuum pump |
| CN109779907A (en) * | 2019-03-07 | 2019-05-21 | 西安航天动力研究所 | A kind of dry vacuum pump silencer |
| US10316864B2 (en) | 2015-04-13 | 2019-06-11 | Dayco Ip Holdings, Llc | Devices for producing vacuum using the venturi effect |
| CN110152423A (en) * | 2018-03-22 | 2019-08-23 | 苏州晨霞美合智能科技有限公司 | A kind of stirring-type flue gas device for reducing dust |
| US10519984B2 (en) | 2014-06-06 | 2019-12-31 | Dayco Ip Holdings, Llc | Noise attenuation in a Venturi device and/or check valves |
| US10626888B2 (en) | 2014-07-10 | 2020-04-21 | Dayco Ip Holdings, Llc | Dual Venturi device |
-
2009
- 2009-03-31 CN CN200920116770U patent/CN201377408Y/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3055597A4 (en) * | 2013-10-08 | 2017-06-07 | Dayco IP Holdings, LLC | Noise attenuation in a check valve unit or apparatus for producing vacuum |
| EP3505801A1 (en) * | 2013-10-08 | 2019-07-03 | Dayco IP Holdings, LLC | Noise attenuation in a check valve unit or apparatus for producing vacuum |
| US10190549B2 (en) | 2014-04-04 | 2019-01-29 | Dayco Ip Holdings, Llc | Check valves and venturi devices having the same |
| US10473235B2 (en) | 2014-04-04 | 2019-11-12 | Dayco Ip Holdings, Llc | Bypass check valve and Venturi having same |
| US10024458B2 (en) | 2014-04-04 | 2018-07-17 | Dayco Ip Holdings, Llc | Bypass check valve and venturi devices having the same |
| US10107240B2 (en) | 2014-04-04 | 2018-10-23 | Dayco Ip Holdings, Llc | Check valves and Venturi devices having the same |
| US10024339B2 (en) | 2014-05-30 | 2018-07-17 | Dayco Ip Holdings, Llc | Vacuum creation system having an ejector, pneumatic control valve and optionally an aspirator |
| US10519984B2 (en) | 2014-06-06 | 2019-12-31 | Dayco Ip Holdings, Llc | Noise attenuation in a Venturi device and/or check valves |
| US10626888B2 (en) | 2014-07-10 | 2020-04-21 | Dayco Ip Holdings, Llc | Dual Venturi device |
| US10100720B2 (en) | 2015-01-09 | 2018-10-16 | Dayco Ip Holdings, Llc | Crankcase ventilating evacuator |
| US10316864B2 (en) | 2015-04-13 | 2019-06-11 | Dayco Ip Holdings, Llc | Devices for producing vacuum using the venturi effect |
| CN104963826A (en) * | 2015-07-10 | 2015-10-07 | 中国检验检疫科学研究院 | Noise reduction instrument of mechanical pump |
| CN105836305A (en) * | 2016-06-08 | 2016-08-10 | 杜海峰 | Self-mixing blend oil packaging container |
| CN107956673A (en) * | 2017-11-21 | 2018-04-24 | 浙江工贸职业技术学院 | A kind of Muffling vibration absorber |
| CN110152423A (en) * | 2018-03-22 | 2019-08-23 | 苏州晨霞美合智能科技有限公司 | A kind of stirring-type flue gas device for reducing dust |
| CN109695559A (en) * | 2019-02-26 | 2019-04-30 | 吉利汽车研究院（宁波）有限公司 | A kind of vacuum pump denoising device and vacuum pump |
| CN109779907A (en) * | 2019-03-07 | 2019-05-21 | 西安航天动力研究所 | A kind of dry vacuum pump silencer |
| CN109779907B (en) * | 2019-03-07 | 2023-12-26 | 西安航天动力研究所 | Silencer for dry vacuum pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100106 Termination date: 20120331 |