CN1065818A

CN1065818A - Low-frequency sound wave exciting device

Info

Publication number: CN1065818A
Application number: CN 91102422
Authority: CN
Inventors: 屠勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-04-19
Filing date: 1991-04-19
Publication date: 1992-11-04

Abstract

Low-frequency sound wave exciting device decapacitation of the present invention is done outside the energy with pressurized air or superheated vapor, is power with general fan airflow mainly.Make shell with stainless steel cylinder, in establish an air door, be the windmill shape, rotate with air-flow.Along with rotation, air door continuous is opened one and is closed, and goes out the sinusoidal wave acoustic streaming of interruption-forming at tube and is used for encouraging sound field.Can be designed to single sinusoidal acoustic wave type by the purposes difference, single combined housing half-sinusoid acoustic wave type, doubly-linked is recommended sinusoidal acoustic wave type, the doubly-linked standing wave type.Centrifugal reduction gear comes the automatic control storm door rotating speed and reaches stable on the frequency of sound wave mat air door.

Description

Low-frequency sound wave exciting device

The present invention relates to a kind of motivational techniques and device of all-bottom sound wave field, to replace domestic and international existing motivational techniques and device.

Acoustic pressure is at the low frequency sound field more than 130 decibels, and the boundary-layer of all kinds of materials is had very important effect.Acoustic pressure is 20 all sound fields of 150 decibels, average vibration velocity 1.5 meter per seconds of air particle, 120 millimeters of average amplitude.Big like this amplitude reaches physical phenomenons such as the heat transfer relevant with vibration velocity, evaporation, burning, dust stratification with the fine structure that vibration velocity will inevitably influence material interface in the sound field.Sweden scholar Wal people such as gloomy grade adopts positive feedback resonance excitation device to carry out the ash disposal of boiler, the dust removal of carpet, and the cooling of material, evaporation and distillation etc. all have significant facilitation.(Journal of Frequency Noise and Vibration Vol.5 NO.1 pp9-12 1986) (u.s.p.4359962 1982). because its complex structure is bulky, use inconvenience to be difficult to promote by dress.

The shortcoming that infrasonic wave that employing Xi Baike siren principle is changed system into and low-frequency sound wave acoustical generator (patent No. 89200617) have overcome state's outer volume macrostructure complexity, but must use pressurized air and not produce resonance, the required energy consumption of sound field that therefore will reach the equal sound intensity is bigger.

The object of the invention is to overcome the deficiency of said two devices, reaches miniaturization and energy-conservation satisfactory to both parties, mainly is used as power with general fan airflow and drives an air door to rotate except that available pressurized air or superheated vapor, air-flow is transformed into acoustic streaming encourages sound field.According to the requirement of different acoustic fields, can be designed to stream and carry sinusoidal sound wave, half-sinusoid ideophone ripple, doubly-linked are recommended sinusoidal wave and doubly-linked standing wave equal excitation device.

Accompanying drawing is represented acoustic waveform curve and the embodiment and the application example figure of apparatus of the present invention.

Fig. 1 is the sinusoidal acoustic wave excitation device master cut-open view of this embodiment.

Fig. 2 is the cut away left side view of Fig. 1.

Fig. 3 is the acoustic pressure curve map that Fig. 1 device is encouraged.

Fig. 4 is the half-wave ideophone wave apparatus master cut-open view of this embodiment.

Fig. 5 is the right side cross-sectional view of Fig. 4.

Fig. 6 is the acoustic pressure curve map that Fig. 4 device is encouraged.

Fig. 7 is this embodiment doubly-linked push-pull drive device master cut-open view.

Fig. 8 is the acoustic pressure curve map that Fig. 7 device is encouraged.

Fig. 9 is the boiler ash removal application example figure of Fig. 1 device.

Figure 10 is the coaxial standing wave type plastic cool of the doubly-linked of Fig. 1 device application example figure.

Figure 11 is the standing wave acoustic pressure curve map that Figure 10 doubly-linked device is encouraged.

Figure 12 is Figure 10 doubly-linked device standing wave carpet dry application instance graph.

Figure 13 is the combustion-supporting application example figure of sinusoidal sound wave that resonates that recommends of Fig. 7 device.

Embodiment: apparatus of the present invention are made with stainless steel.Shell is round barrel shape.Chew (1) by accompanying drawing 1 air-flow from gas and go into housing (2) to air door (3), because respectively there is recessed skewed slot the air door both sides, play windmill, air door is changeed with air-flow is outstanding at a high speed, forward to when consistent with the cylindrical shell xsect, air-flow closes, in the time of vertically, and air communication.Rotate a circle, secondary is logical to be closed, that is two sinusoidal wave acoustic streamings are arranged, through the required sound field of nozzle de-energisation.The position of the outer permanent magnet (4) of air door rotating speed mat tube is regulated, and when rotating speed was too high, the permanent magnet (5) of band spring was inhaled mutually with the outer permanent magnet of tube and air door is slowed down away from the center on the air door.Accompanying drawing 4 is a composite structure, installs a sphere hoop in the housing tube additional, and air door rotates within it and produces half-wave ideophone ripple.Accompanying drawing 7 links structure for a pair of, fasten on same axle of the air door for two, air door mutually at an angle of 90, the outlet sound wave each other 180 ° anti-phase, can recommend the resonance running.

Claims

1, a kind of low-frequency sound wave exciting device that is used as power by air-flow (comprising superheated vapor), its special card is to have in the housing tube air door to be the windmill shape, can be with air-flow high speed rotating, along with the continuous switching of rotary air valve, form sinusoidal sound wave in the exit and be used for encouraging sound field.Because of the purposes difference can be designed to multiple different excitation waveform, its frequency can be given and be set earlier and control automatically with centrifugal reduction gear on the air door.

2, according to the described exciting bank of claim 1, its special card is the rotary air valve that is windmill structure in the housing tube, can be with the air-flow high speed rotating at cylindrical shell exit formation excitation sound wave.

3, according to the described exciting bank of claim 1, it is characterized in that with cylinder and sphere hoop compoundly, form housing, air door rotates within it and forms half-wave shape excitation sound wave.

4, according to the described exciting bank of claim 1, its characteristics are to become two single exciting banks with same rotating shaft composition doubly-linked recommends sine and standing wave exciting bank.

5, according to the described exciting bank of claim 1, it is characterized in that the stable of frequency of sound wave, the effect of all kinds of centrifugal devices on the mat air door (friction or magnet attractive force) comes the rotating speed of automatic control storm door and realizes.

6,, it is characterized in that recommending the foundation and the application of the resonance sound field of sinusoidal acoustic wave excitation device according to the described exciting bank of claim 1.

7,, it is characterized in that flowing the excitation and the application of all kinds of sound fields such as carrying sine wave, half-wave, standing wave according to the described exciting bank of claim 1.