CN201627781U - Adjustable wide frequency damping muffler - Google Patents
Adjustable wide frequency damping muffler Download PDFInfo
- Publication number
- CN201627781U CN201627781U CN2009203182326U CN200920318232U CN201627781U CN 201627781 U CN201627781 U CN 201627781U CN 2009203182326 U CN2009203182326 U CN 2009203182326U CN 200920318232 U CN200920318232 U CN 200920318232U CN 201627781 U CN201627781 U CN 201627781U
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- pipe joint
- spring
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- cavity
- oscillating body
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Abstract
The utility model discloses an adjustable wide frequency damping muffler, wherein a pipe joint (2) is connected with three lumped parameter vibration systems which respectively have high, middle and low frequency range characteristics, the structure of each lumped parameter vibration system is that a shell (3) is connected on the pipe joint (2), an inner cavity thereof is communicated with the inner cavity of the pipe joint (2), the inner cavity of the shell (3) is separated into an upper cavity and a lower cavity by\ a movable vibrating body (7) which is arranged in the shell (3), a damper hole (8) is arranged on the vibrating body (7), one end on the shell (3), which is far from the pipe joint (2) is provided with an adjusting nut (4), a first spring (9) is arranged in the lower cavity, a second spring (6) is arranged in the upper cavity, and a pressing plate (5) is arranged between the adjusting nut (4) and the second spring (6). The adjustable wide frequency damping muffler has small volume and excellent filter effect, and can adjust resonant frequency to adapt to work condition change.
Description
Technical field
The utility model relates to a kind of adjustable wideband vibration-absorbing and silencing device, and this device utilizes the coupled vibrations of liquid and solid, eliminates the pulsation energy in the hydraulic system, thereby reaches the effect of vibration damping and noise elimination.
Background technique
Hydraulic system is the core technology of all kinds of machinery.Along with hydraulics develops to high speed, high pressure and high-power direction, the vibration and noise in the hydraulic system becomes one of key factor that hinders the hydraulics progress and the security of the lives and property.
The vibration and noise of hydraulic system normally is harmful to very much.Vibration and noise that the hydraulic system pressure pulsation causes are propagated along pipeline, directly cause the stress fluctuation and the mechanical vibration of pipeline.U.S. scientific research personnel draws following rule in the process of the development F-15 of Mcdonnell company fighter: amplitude of pressure fluctuation will cause higher vibration stress greater than 10% o'clock of system works pressure, and delivery channel is destroyed rapidly; Amplitude of pressure fluctuation is in the 2.5-10% of system works pressure scope, and then the pipe clamp mat is easy to wear, may cause conduit to destroy, and the one-way valve in the pumping source loop is wearing and tearing easily also, influence the system works reliability.Both at home and abroad since hydraulic system to vibrate caused accident of common occurrence, as the F14 of the U.S. and China destroy seven and F-8 fighter etc. similarly accident all took place.
The internal structural characteristic of oil hydraulic pump has determined the flow of output not to be constant but to change, and the output flow of pump forms system pressure after running into the system load impedance, thereby determined the periodicity of output flow and pressure.
The noise-cancelling theory of structural vibration formula gas suppresses to provide brand-new thinking for the hydraulic system pulsation.But different with gas noise elimination wave filter is, the hydraulic filter structure also must adapt to the big flow of high pressure, stable state, low compressibility and the working condition requirement such as corrosion-resistant of hydraulic oil.
The model utility content
Technical problem to be solved in the utility model provides that a kind of volume is little, good wave filtering effect, can regulate the adjustable wideband vibration-absorbing and silencing device that resonant frequency changes with adaptation condition.
In order to solve the problems of the technologies described above, the adjustable wideband vibration-absorbing and silencing device that the utility model provides, comprise pipe joint, on described pipe joint, be connected with three and be respectively high, in, the lumped parameter vibration system of low-frequency range characteristic, the structure of each described lumped parameter vibration system is that housing is connected on the described pipe joint and its inner chamber communicates with described pipe joint inner chamber, in described housing, be provided with movable oscillating body its inner chamber is separated into epicoele and cavity of resorption, run through being provided with on the described oscillating body, the damping hole of cavity of resorption, end away from described pipe joint on described housing is provided with the adjustment nut, be provided with first spring in the cavity of resorption between described oscillating body and described pipe joint, be provided with second spring in the epicoele between described oscillating body and described adjustment nut, between described adjustment nut and described second spring, be provided with pressing plate.
Adopt the adjustable wideband vibration-absorbing and silencing device of technique scheme, utilize the coupled vibrations of liquid solid, eliminate the vibration and the noise that produce in the hydraulic system.Damping hole in spring, oscillating body and the oscillating body constitutes " quality+spring+damping " lumped parameter vibration system, three lumped parameter vibration systems have high, normal, basic band characteristic respectively, adjust nut and pressing plate by regulating respectively, can change the vibration frequency of lumped parameter vibration system, when will causing the lumped parameter vibration system that frequency is close with it during by pipe joint, the hydraulic oil with a certain frequency range ripple frequency produces resonance, reduce pulsation energy in the hydraulic system with this, thereby reach the effect of vibration and noise reduction of hydraulic system.
In sum, the utility model is that a kind of volume is little, good wave filtering effect, can regulate the adjustable wideband vibration-absorbing and silencing device that resonant frequency changes with adaptation condition, be a kind of equipment that high-pressure hydraulic pressure pulsation suppresses that is used for, for hydraulic system vibration and noise control provide utility.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is an A place enlarged view among Fig. 1.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 1 and Fig. 2, pipe joint 2 two ends are provided with hydraulic fluid port 1, on pipe joint 2, be connected with three and be respectively high, in, the lumped parameter vibration system of low-frequency range characteristic, the structure of each lumped parameter vibration system is that housing 3 is weldingly fixed on the pipe joint 2 and its inner chamber communicates with pipe joint 2 inner chambers, in housing 3, be provided with movable oscillating body 7 its inner chamber is separated into epicoele and cavity of resorption, run through being provided with on the oscillating body 7, the damping hole 8 of cavity of resorption, end away from pipe joint 2 on housing 3 is provided with adjustment nut 4, be provided with first spring 9 in the cavity of resorption between oscillating body 7 and pipe joint 2, be provided with second spring 6 in the epicoele between oscillating body 7 and adjustment nut 4, between adjustment nut 4 and described second spring 6, be provided with pressing plate 5.
Referring to Fig. 1 and Fig. 2, adjust nut 4 and pressing plate 5 respectively and can control the decrement of first spring 9 and second spring 6, and then can adjust first spring 9, second spring 6 and the vibration frequency of oscillating body 7 in housing 3, oscillating body 7 adopts big Spielpassung with housing 3, and pressing plate 5 adopts little Spielpassung with housing 3.
Referring to Fig. 1 and Fig. 2, first spring 9 in first lumped parameter vibration system, second spring 6, oscillating body 7 and damping hole wherein 8 constitute high band " quality+spring+damping " lumped parameter vibration system, first spring 9 in second lumped parameter vibration system, second spring 6, oscillating body 7 and damping hole wherein 8 constitute Mid Frequency " quality+spring+damping " lumped parameter vibration system, first spring 9 in the 3rd lumped parameter vibration system, second spring 6, oscillating body 7 and damping hole wherein 8 constitute low-frequency range " quality+spring+damping " lumped parameter vibration system, this vibration-absorbing and silencing device is connected with the pipeline of hydraulic system by hydraulic fluid port 1, when the hydraulic oil with a certain frequency range ripple frequency flows through this device, by adjusting nut 4 and pressing plate 5, regulate first spring 9 in the lumped parameter vibration system of the frequency range that adapts with it, the decrement of second spring 6, make first spring 9, the natural frequency of second spring 6 and oscillating body 7 is consistent with the hydraulic oil ripple frequency and form resonance, eliminate hydraulic oil pulsation energy, thereby realize the purpose of vibration and noise reducing.For reducing to impact, improve the oscillating body working stability, be drilled with damping hole 8 on the oscillating body 7.Use of the present utility model can be eliminated the pulsation energy in the hydraulic system, solves the vibration and noise problem in the hydraulic system, and the stability of hydraulic system, Security are significantly improved, thereby improves the working life of hydraulic system.
As known from the above, the utility model is a kind of structural vibration formula vibration-absorbing and silencing device, has the vibration frequency adjustability within the specific limits, be installed in the pipeline of hydraulic system, can reduce or eliminate the hydraulic pulsation of the different frequency that produces in the hydraulic system, reach vibration damping and noise reduction effect in the hydraulic work system process, improve the Security of system, be suitable for the hydraulic system of high, normal, basic arbitrary frequency range.
Claims (1)
1. adjustable wideband vibration-absorbing and silencing device, comprise pipe joint (2), it is characterized in that: on described pipe joint (2), be connected with three and be respectively high, in, the lumped parameter vibration system of low-frequency range characteristic, the structure of each described lumped parameter vibration system is that housing (3) is connected on the described pipe joint (2) and its inner chamber communicates with described pipe joint (2) inner chamber, in described housing (3), be provided with movable oscillating body (7) its inner chamber is separated into epicoele and cavity of resorption, on described oscillating body (7), be provided with and run through, the damping hole of cavity of resorption (8), an end of going up away from described pipe joint (2) at described housing (3) is provided with adjustment nut (4), be provided with first spring (9) in the cavity of resorption between described oscillating body (7) and described pipe joint (2), be provided with second spring (6) in the epicoele between described oscillating body (7) and described adjustment nut (4), between described adjustment nut (4) and described second spring (6), be provided with pressing plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203182326U CN201627781U (en) | 2009-12-23 | 2009-12-23 | Adjustable wide frequency damping muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203182326U CN201627781U (en) | 2009-12-23 | 2009-12-23 | Adjustable wide frequency damping muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201627781U true CN201627781U (en) | 2010-11-10 |
Family
ID=43059175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203182326U Expired - Fee Related CN201627781U (en) | 2009-12-23 | 2009-12-23 | Adjustable wide frequency damping muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201627781U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103443862A (en) * | 2011-02-15 | 2013-12-11 | 西屋电气有限责任公司 | Noise and vibration mitigation system for nuclear reactors employing an acoustic side branch resonator |
-
2009
- 2009-12-23 CN CN2009203182326U patent/CN201627781U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103443862A (en) * | 2011-02-15 | 2013-12-11 | 西屋电气有限责任公司 | Noise and vibration mitigation system for nuclear reactors employing an acoustic side branch resonator |
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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: 20101110 Termination date: 20101223 |