CN203822414U - Variable-frequency Helmholtz muffler - Google Patents
Variable-frequency Helmholtz muffler Download PDFInfo
- Publication number
- CN203822414U CN203822414U CN201420240979.5U CN201420240979U CN203822414U CN 203822414 U CN203822414 U CN 203822414U CN 201420240979 U CN201420240979 U CN 201420240979U CN 203822414 U CN203822414 U CN 203822414U
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- China
- Prior art keywords
- cylindrical shell
- piston
- silencing apparatus
- spring latch
- tie bar
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- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims description 34
- 230000030279 gene silencing Effects 0.000 claims description 28
- 230000001276 controlling effect Effects 0.000 claims description 10
- 230000013011 mating Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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Abstract
The utility model relates to a variable-frequency Helmholtz muffler which comprises a barrel, an end cover fixedly arranged at one end of the barrel, a piston and a piston adjusting mechanism. The piston adjusting mechanism comprises an adjusting pull rod and a locking mechanism, one end of the adjusting pull rod is connected with the piston, the locking mechanism is arranged at the other end of the barrel and is used for relatively locking the adjusting pull rod, the locking mechanism comprises a clamping plate fixedly arranged at the other end of the barrel, a through hole is formed in the clamping plate, the adjusting pull rod is arranged in the through hole and is in sliding connection with the through hole, gear racks are arranged on the two opposite sides of the adjusting pull rod, the locking mechanism further comprises spring locks symmetrically arranged on the two sides of the through hole, the spring locks on the two sides correspond to the gear racks on the two sides one to one, and the spring locks comprise lock heads and keys used for controlling the spring locks to be in an unlocked state from a locked state. When the spring locks are in the locked state, the lock heads of the spring locks abut against the gear racks. When the spring locks are in the unlocked state, the lock heads of the spring locks are separated from the gear racks. The piston adjusting mechanism of the muffler is easy and convenient to operate.
Description
Technical field
The utility model relates generally to a kind of variable frequency Helmholtz silencing apparatus.
Background technique
Helmholtz silencing apparatus is a kind of silencing apparatus more common in gas handling system, is mainly used in eliminating arrowband low-frequency noise.At present the coupling development process of conventional gas handling system is to carry out simulation analysis according to motor and gas handling system parameter, and relatively optimized project carries out material object and processes and test, finally definite scheme confirm mounting point and the geometric parameter of Helmholtz silencing apparatus.Optimizing Flow for the induction noise that exceeds standard confirms to exceed standard frequency band for slight elevated noise being carried out to frequency analysis, then designs Helmholtz silencing apparatus or the quarter-wave long tube of frequency band and eliminates slight elevated noise.Due to the problem such as degree of accuracy and gas handling system machining error of gas handling system relevant parameter, simulation result is not often very accurate, and the test sample designing does not often reach Optimum Matching effect yet.For this problem, in prior art, be also designed with the silencing apparatus of changeable frequency, but the controlling mechanism complex structure of the silencing apparatus of changeable frequency of the prior art, troublesome poeration.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of variable frequency Helmholtz silencing apparatus simple to operation is provided.
For solving above technical problem, the utility model adopts following technological scheme:
A kind of variable frequency Helmholtz silencing apparatus, comprise cylindrical shell, be fixedly installed on the end cap of described cylindrical shell one end, be arranged on piston in described cylindrical shell and for regulating the piston controlling mechanism of described piston at the axial position of described cylindrical shell, described end cap and described cylindrical shell are tightly connected, the other end that described piston controlling mechanism comprises the regulating tie bar that one end is connected with described piston and is fixedly installed on described cylindrical shell is for the locking framework to the relative locking of described regulating tie bar, the other end of described regulating tie bar is extended to outside described cylindrical shell by the other end of described cylindrical shell, described locking framework comprises the clamp of the other end that is fixedly installed on described cylindrical shell, on described clamp, offer through hole, described regulating tie bar is positioned at described through hole and described through hole is slidably connected, relative two sides of described regulating tie bar are provided with tooth bar, described locking framework also comprises the spring latch that is symmetricly set on described clamp and is positioned at described through hole both sides, the spring latch of described both sides is corresponding one by one with the tooth bar of described both sides, described spring latch comprises tapered end and for controlling the button of described spring latch when locking state to released state, in the time that described spring latch is in the lock state, the tapered end of described spring latch and described tooth bar are inconsistent, when described spring latch is during in released state, the tapered end of described spring latch departs from described tooth bar, on described end cap, offer suction port, described suction port is provided with internal thread connecting piece.
The other end symmetry of described cylindrical shell offers two draw-in grooves, and described two draw-in grooves are taking the shaft axis of described cylindrical shell as symmetrical center line, and the two end part of described clamp are fixedly installed in described draw-in groove.
Described through hole is positioned on the shaft axis of described cylindrical shell.
On the side of described piston, offer two grooves along the circumferencial direction spaced and parallel of described piston, on described groove, seal ring is installed.
Length direction along described regulating tie bar on described regulating tie bar is provided with calibrated scale.
On the other end of described regulating tie bar, be fixedly connected with regulating handle.
Described silencing apparatus also comprises the interpolation pipe being connected with described internal thread connecting piece, and one end of described interpolation pipe is positioned at described cylindrical shell, and the other end extends to outside described cylindrical shell through described end cap.
On the outer side surface of described interpolation pipe, be provided with the outside thread in mating connection with described internal thread connecting piece.
Due to the enforcement of technique scheme, the utility model compared with prior art tool has the following advantages:
The utility model variable frequency Helmholtz silencing apparatus, utilize spring latch to carry out relative release and locking to regulating tie bar, and then regulate noise elimination volume, only with hand promotion tapered end just can lock pull bar, can be by pull bar release and just push button, simple to operation.
Variable frequency Helmholtz acoustic wave filter structure of the present utility model is simple, convenient and practical.
Brief description of the drawings
Fig. 1 is the stereogram of variable frequency Helmholtz silencing apparatus of the present utility model;
Fig. 2 is the clamp of variable frequency Helmholtz silencing apparatus of the present utility model and the structural representation of spring latch;
In figure, the represented name of numeral is called:
1, cylindrical shell; 2, end cap; 3, piston; 4, regulating tie bar; 5, clamp; 6, through hole; 7, spring latch; 8, tapered end; 9, tooth bar; 10, interpolation pipe; 11, internal thread connecting piece; 12, seal ring; 13, regulating handle; 14, button.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
As shown in Figure 1 and 2, variable frequency Helmholtz silencing apparatus, comprise cylindrical shell 1, be fixedly installed on the end cap 2 of cylindrical shell one end, be arranged on piston 3 in cylindrical shell 1 and the piston controlling mechanism at the axial position of cylindrical shell 1 for regulating piston 3, end cap 2 is tightly connected with cylindrical shell 1, the other end that piston controlling mechanism comprises the regulating tie bar 4 that one end is connected with piston 3 and is fixedly installed on cylindrical shell 1 is for the locking framework to the relative locking of regulating tie bar 4, the other end of regulating tie bar 4 is extended to outside cylindrical shell 1 by the other end of cylindrical shell 1, locking framework comprises the clamp 5 of the other end that is fixedly installed on cylindrical shell 1, on clamp 5, offer through hole 6, regulating tie bar 4 is positioned at through hole 6 and is slidably connected with through hole 6, relative two sides of regulating tie bar 4 are provided with tooth bar 9, locking framework also comprises the spring latch 7 that is symmetricly set on clamp 5 and is positioned at through hole 6 both sides, the spring latch 7 of both sides is corresponding one by one with the tooth bar 9 of both sides, spring latch comprises tapered end 8 and the button 14 when locking state to released state for control spring lock, working procedure is as follows: spring latch 7 is in the lock state with hand propulsion tapered end 8, now spring latch 7 is in the lock state, the tapered end 8 of spring latch 7 is inconsistent with tooth bar 9, the button 14 of pressing spring latch 7 with hand, tapered end 8 flicks, and now spring latch 7 is in the time of released state, and the tapered end 8 of spring latch 7 departs from tooth bar 9.
While specifically setting, offer two draw-in grooves in the other end of cylindrical shell 1 symmetry, the shaft axis taking cylindrical shell 1 of two draw-in grooves is symmetrical center line, and the two end part of clamp 5 are fixedly installed in draw-in groove; Through hole 6 is positioned on the shaft axis of cylindrical shell 1, and one end of regulating tie bar 4 is connected with the center of piston 3; On regulating tie bar 4, be provided with calibrated scale along the length direction of regulating tie bar 4, can accurately adjust like this noise elimination volume; On the other end of regulating tie bar 4, be fixedly connected with regulating handle 13, easy-to-operat.
On the side of piston 3, offer two grooves along the circumferencial direction spaced and parallel of piston 3, on two grooves, seal ring 12 is installed, in piston 3 motions, play leading role like this.
The utility model silencing apparatus offers suction port on end cap, and suction port is provided with internal thread connecting piece 11, and internal thread connecting piece 11 is standard female link.This silencing apparatus can be confirmed whether to use interpolation pipe 10 as required, if use interpolation pipe 10, be provided with the outside thread that can be connected with internal thread connecting piece 11 at the outer side surface of interpolation pipe 10, interpolation pipe 10 can coordinate with internal thread connecting piece 11 change interpolation pipe 10 to stretch into the degree of depth in cylindrical shell 1 by outside thread, the interpolation pipe 10 of different length also can be installed as required, and then can mate the impact of interpolation pipe Helmholtz silencing apparatus on induction noise.
If while not needing to use interpolation pipe 10, can directly flexible pipe be connected with internal thread connecting piece 11, by clip, flexible pipe is connected on internal thread connecting piece 11 to the best noise elimination volume scheme that can mate different hose length Helmholtz silencing apparatuss by change connecting hose length.
The working procedure of the utility model piston controlling mechanism:
When spring latch 7 being in the lock state with hand propulsion tapered end 8, now spring latch 7 is in the lock state, and the tapered end 8 of spring latch 7 is inconsistent with tooth bar 9, and now piston 3 is fixing, can not slide along the axial direction of cylindrical shell 1;
When press the button 14 of spring latch 7 with hand, tapered end 8 flicks, now spring latch 7 is in the time of released state, the tapered end 8 of spring latch 7 departs from tooth bar 9, now piston 3 can be movable, pulls handle 13, and piston 3 is adjusted to and needs position, then promote tapered end 8 spring latch 7 is in the lock state, fixed piston 3.
Above the utility model is described in detail; its object is to allow the personage who is familiar with this art can understand content of the present utility model and be implemented; can not limit protection domain of the present utility model with this; all equivalences of doing according to Spirit Essence of the present utility model change or modify, and all should be encompassed in protection domain of the present utility model.
Claims (8)
1. a variable frequency Helmholtz silencing apparatus, comprise cylindrical shell, be fixedly installed on the end cap of described cylindrical shell one end, be arranged on piston in described cylindrical shell and for regulating the piston controlling mechanism of described piston at the axial position of described cylindrical shell, described end cap and described cylindrical shell are tightly connected, the other end that described piston controlling mechanism comprises the regulating tie bar that one end is connected with described piston and is fixedly installed on described cylindrical shell is for the locking framework to the relative locking of described regulating tie bar, the other end of described regulating tie bar is extended to outside described cylindrical shell by the other end of described cylindrical shell, it is characterized in that, described locking framework comprises the clamp of the other end that is fixedly installed on described cylindrical shell, on described clamp, offer through hole, described regulating tie bar is positioned at described through hole and described through hole is slidably connected, relative two sides of described regulating tie bar are provided with tooth bar, described locking framework also comprises the spring latch that is symmetricly set on described clamp and is positioned at described through hole both sides, the spring latch of described both sides is corresponding one by one with the tooth bar of described both sides, described spring latch comprises tapered end and for controlling the button of described spring latch when locking state to released state, in the time that described spring latch is in the lock state, the tapered end of described spring latch and described tooth bar are inconsistent, when described spring latch is during in released state, the tapered end of described spring latch departs from described tooth bar, on described end cap, offer suction port, described suction port is provided with internal thread connecting piece.
2. variable frequency Helmholtz silencing apparatus according to claim 1, it is characterized in that, the other end symmetry of described cylindrical shell offers two draw-in grooves, and described two draw-in grooves are taking the shaft axis of described cylindrical shell as symmetrical center line, and the two end part of described clamp are fixedly installed in described draw-in groove.
3. variable frequency Helmholtz silencing apparatus according to claim 1, is characterized in that, described through hole is positioned on the shaft axis of described cylindrical shell.
4. variable frequency Helmholtz silencing apparatus according to claim 1, is characterized in that, on the side of described piston, offers two grooves along the circumferencial direction spaced and parallel of described piston, on described groove, seal ring is installed.
5. variable frequency Helmholtz silencing apparatus according to claim 1, is characterized in that, the length direction along described regulating tie bar on described regulating tie bar is provided with calibrated scale.
6. variable frequency Helmholtz silencing apparatus according to claim 5, is characterized in that, on the other end of described regulating tie bar, is fixedly connected with regulating handle.
7. variable frequency Helmholtz silencing apparatus according to claim 1, it is characterized in that, described silencing apparatus also comprises the interpolation pipe being connected with described internal thread connecting piece, and one end of described interpolation pipe is positioned at described cylindrical shell, and the other end extends to outside described cylindrical shell through described end cap.
8. variable frequency Helmholtz silencing apparatus according to claim 7, is characterized in that, is provided with the outside thread in mating connection with described internal thread connecting piece on the outer side surface of described interpolation pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240979.5U CN203822414U (en) | 2014-05-12 | 2014-05-12 | Variable-frequency Helmholtz muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240979.5U CN203822414U (en) | 2014-05-12 | 2014-05-12 | Variable-frequency Helmholtz muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203822414U true CN203822414U (en) | 2014-09-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420240979.5U Expired - Fee Related CN203822414U (en) | 2014-05-12 | 2014-05-12 | Variable-frequency Helmholtz muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203822414U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654272A (en) * | 2016-07-25 | 2018-02-02 | 上海汽车集团股份有限公司 | For automotive air intake and the Helmholtz silencer of exhaust debugging |
| CN107727376A (en) * | 2017-09-18 | 2018-02-23 | 哈尔滨工程大学 | A kind of adjustable silencer experimental prototype of intubation length |
| CN107972535A (en) * | 2016-10-21 | 2018-05-01 | 福特全球技术公司 | The system and method that variable acoustic suppresses in adjustable seat |
| CN108867986A (en) * | 2018-07-02 | 2018-11-23 | 长春理工大学 | Combined frequency-change acoustic tile |
| CN109958560A (en) * | 2017-12-14 | 2019-07-02 | 郑州宇通客车股份有限公司 | A kind of sound attenuation assembly and the engine system with the sound attenuation assembly, vehicle |
| CN113639135A (en) * | 2021-07-09 | 2021-11-12 | 广西科技大学 | Helmholtz silencer structure capable of actively adjusting perforation rate |
-
2014
- 2014-05-12 CN CN201420240979.5U patent/CN203822414U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107654272A (en) * | 2016-07-25 | 2018-02-02 | 上海汽车集团股份有限公司 | For automotive air intake and the Helmholtz silencer of exhaust debugging |
| CN107972535A (en) * | 2016-10-21 | 2018-05-01 | 福特全球技术公司 | The system and method that variable acoustic suppresses in adjustable seat |
| CN107727376A (en) * | 2017-09-18 | 2018-02-23 | 哈尔滨工程大学 | A kind of adjustable silencer experimental prototype of intubation length |
| CN107727376B (en) * | 2017-09-18 | 2019-12-24 | 哈尔滨工程大学 | Silencer test prototype with adjustable insertion tube length |
| CN109958560A (en) * | 2017-12-14 | 2019-07-02 | 郑州宇通客车股份有限公司 | A kind of sound attenuation assembly and the engine system with the sound attenuation assembly, vehicle |
| CN108867986A (en) * | 2018-07-02 | 2018-11-23 | 长春理工大学 | Combined frequency-change acoustic tile |
| CN113639135A (en) * | 2021-07-09 | 2021-11-12 | 广西科技大学 | Helmholtz silencer structure capable of actively adjusting perforation rate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20200512 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |