SE425597B - FORCED CONTROL SOUND STRUCTORS FOR THE INFRALUE AREA - Google Patents

FORCED CONTROL SOUND STRUCTORS FOR THE INFRALUE AREA

Info

Publication number
SE425597B
SE425597B SE8007150A SE8007150A SE425597B SE 425597 B SE425597 B SE 425597B SE 8007150 A SE8007150 A SE 8007150A SE 8007150 A SE8007150 A SE 8007150A SE 425597 B SE425597 B SE 425597B
Authority
SE
Sweden
Prior art keywords
gas line
sound generator
valve sleeve
pressurized gas
compressed gas
Prior art date
Application number
SE8007150A
Other languages
Swedish (sv)
Other versions
SE8007150L (en
Inventor
P B Fransman
Original Assignee
Ekstroms Vermetekniska Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ekstroms Vermetekniska Ab filed Critical Ekstroms Vermetekniska Ab
Priority to SE8007150A priority Critical patent/SE425597B/en
Priority to DE8181902814T priority patent/DE3174066D1/en
Priority to PCT/SE1981/000296 priority patent/WO1982001328A1/en
Priority to AT81902814T priority patent/ATE18515T1/en
Priority to EP81902814A priority patent/EP0069741B1/en
Publication of SE8007150L publication Critical patent/SE8007150L/en
Priority to DK250482A priority patent/DK152412C/en
Priority to NO821858A priority patent/NO152589C/en
Publication of SE425597B publication Critical patent/SE425597B/en
Priority to FI823866A priority patent/FI71622C/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K7/00—Sirens
    • G10K7/02—Sirens in which the sound-producing member is rotated manually or by a motor

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Stringed Musical Instruments (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Toys (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Description

"soo71so-9 10 l5 20 25 55 2 Ljudgeneratorn består av ett resonansrör l med en öppen ände 2 och en sluten ände 3 samt med en ljudalstrare 4 för tvàngsstyrd tillförsel av tryokgas till resonansrörets slutna ände. Resonansrörets längd motsvarar i det närmaste en kvarts våglängd hos det ljud som skall genereras i ljudgeneratorn. "soo71so-9 10 l5 20 25 55 2 The sound generator consists of a resonant tube 1 with an open end 2 and a closed end 3 and with a sound generator 4 for forced supply of pressurized gas to the closed end of the resonant tube. The length of the resonant tube corresponds approximately to a quarter of a wavelength of the sound to be generated in the sound generator.

Ljudgeneratorn är ansluten till tryckgas, exempelvis kompri- merad luft, vid en rörstuts 5, och tryckgasen pressas ut ip resonansröret stötvis genom ett mekaniskt styrt ventilarrango- mang i ljudalstraren, varigenom åstadkommes att det omväx- lande öppnas och stängas för tryckgasen. Det mekaniskt styrda ventilarrangemanget drives med en drivanordning 6, som kan e vara elektrisk eller pneumatisk. Genom den mekaniska styr- ningen av luftstötarna kan frekvensen ändras genom att öka eller minska hastigheten på ventilarrangemangets växling mellan öppet och stängt tillstånd; varvid hastigheten avpas- sas efter våglängden hos resonansröret l för uppnàende av optimal ijuaefrekn. i Ventilarrangemanget innefattar en till rörstutsen 5 an- sluten inloppshylsa 7, som sträcker sig in i ljudalstrarens 4 slutna hus 8, vilket kommunicerar med resonansröret l. Pâ inloppshylsan är en ventilhylsa 9 roterbart lagrad medelst kullager 10, varvid smörjning kan ske utan att olja eller ofett kommer i kontakt med luftrummet. Ventilhylsan är i sin ena ände tillsluten medelst ett påskruvat lock ll och i sin andra ände förbunden med motorns 6 drivfläns 12 medelst stift 13. Ventilhylsan 9 har två diametralt motsatta öppningar i form av längsgående slitsar 14 för samverkan med en öppning i form av en längsgående slits 15 i inloppshylsan, såsom visas i figf 3, men ventilhylsan kan också ha en enda öppning 14' för samverkan med öppningen 15, såsom visas i fig. 4.The sound generator is connected to pressurized gas, for example compressed air, at a pipe socket 5, and the pressurized gas is forced out of the resonant tube abruptly through a mechanically controlled valve arrangement in the sound generator, thereby causing the alternating opening and closing of the pressurized gas. The mechanically controlled valve arrangement is driven by a drive device 6, which may be electric or pneumatic. Due to the mechanical control of the air shocks, the frequency can be changed by increasing or decreasing the speed of the valve arrangement switching between open and closed condition; wherein the velocity is adapted to the wavelength of the resonant tube 1 in order to achieve an optimal frequency. The valve arrangement comprises an inlet sleeve 7 connected to the pipe socket 5, which extends into the closed housing 8 of the sound generator 4, which communicates with the resonant tube 1. On the inlet sleeve a valve sleeve 9 is rotatably mounted by means of ball bearings 10, whereby lubrication can take place without oil or ofett comes in contact with the air space. The valve sleeve is closed at one end by means of a screwed-on lid 11 and at its other end connected to the drive flange 12 of the motor 6 by means of pins 13. The valve sleeve 9 has two diametrically opposite openings in the form of longitudinal slots 14 for cooperating with an opening in the form of a longitudinal slot 15 in the inlet sleeve, as shown in Fig. 3, but the valve sleeve may also have a single opening 14 'for co-operation with the opening 15, as shown in Fig. 4.

Genom praktiska prov har man funnit, att renhållningen av t.ex. pannor kan ske med frekvenser upp mot 400 Hz men kanske ännu bättre med frekvenser ned mot 20 Mz. Med rätt an- passad resonator kan alstras infraljud långt under 20 Hz.Through practical tests, it has been found that the cleaning of e.g. boilers can be made with frequencies up to 400 Hz but perhaps even better with frequencies down to 20 Mz. With a properly adapted resonator, infrasound can be generated well below 20 Hz.

Utan resonator kan intet ljud med hög intensitet alstras, men uppfinningen medger, att man med ljudalstraren alstrar högt ljud med olika frekvenser i samma resonator.Without a resonator, no high-intensity sound can be generated, but the invention allows the high-pitched sound generator to be generated at different frequencies in the same resonator.

Såsom inses, kommer öppningen l5"i inloppshylsan 7 att 8007150-9 3 växelvis friläggas och tillslutas medelst ventilhylsan 9, när denna roteras medelst motorn 6, för avßivning av tryck- luftstötar till resonansröret l, mot vars inre öppningen 15 är riktad.As will be appreciated, the opening 15 "in the inlet sleeve 7 will be alternately exposed and closed by the valve sleeve 9, when rotated by the motor 6, for releasing compressed air shocks to the resonant tube 1, towards which the inner opening 15 is directed.

För kylning av resonansröret l invändigt kan tillföras luft eller kylvatten till resonansrörets inre genom en led- ning_l6.For cooling the resonant tube l internally, air or cooling water can be supplied to the interior of the resonant tube through a line_l6.

Claims (5)

,\J"l soovfiso-9) Ä, PATENTKRAV, \ J "l soov fi so-9) Ä, PATENTKRAV 1. l. Tvångsstyrd ljudalstrare för infraljudområdet, vilken ljudalstrare är anordnad för reglerad tillförsel av tryckgas- pulser från en tryckgasledning (7) till en resonator (l) för renhållning av värmepannor el.dyl. och innefattar ett ventil- organ (9), som är kopplat till en drivmotor (6) för att drivas av denna och därvid reglera avgivningen av tryckgaspulserna från tryckgasledningen (7), k ä n n e t e c k n add av att '_ventilorganet utgöres av en på tryckgasledningen (7) koaxiellt lO 15 _20 25 30 anordnad och på denna medelst rullningslager (10) vid vardera änden roterbart lagrad ventilhylsa (9) med en eller fler öpp-_ ningar (14, l4') för samverkan med en eller flera öppningar (15) i tryckgasledningen vid ventilhylsans rotation och att resonatorn (l) utgöres av ett resonansrör vars längd i huvud- sak motsvarar en kvarts våglängd hos det i ljudalstraren ~alstrade ljudet.1. l. Forcibly controlled sound generator for the infrasound area, which sound generator is arranged for controlled supply of compressed gas pulses from a compressed gas line (7) to a resonator (l) for cleaning boilers etc. and comprises a valve means (9), which is coupled to a drive motor (6) for driving it and thereby regulating the emission of the pressurized gas pulses from the pressurized gas line (7), characterized in that the valve means is constituted by one on the pressurized gas line ( 7) arranged coaxially 10 and on which by means of rolling bearing (10) rotatably mounted valve sleeve (9) at each end with one or more openings (14, 14 ') for co-operation with one or more openings (15) in the pressurized gas line during the rotation of the valve sleeve and that the resonator (1) consists of a resonant tube whose length substantially corresponds to a quarter wavelength of the sound generated in the sound generator. 2. ïvångsstyrd ljudalstrare enligt krav l, k ä n n e - t e c k-n a d av att ventilhylsan (9) har en öppning (l4'),' som i förhållande till öppningen (15) 1 tryckgasledningen (7) är dimensionerad motsvarande 50% av öppnings- resp. stän¿- ningstiden. 92. A forced sound generator according to claim 1, characterized in that the valve sleeve (9) has an opening (14 '), which in relation to the opening (15) in the compressed gas line (7) is dimensioned corresponding to 50% of the opening. - resp. the closing time. 9 3. aTvångsstyrdrljudalstrare enligt krav l eller 2, K ä n - n e t e c k n a d av att öppningarna-(lä, 14' resp. l5) i ventilhylsan (9) resp. tryckgasledningen (7) är anordnade som långsträckta slitsar.3. A forced force sound generator according to claim 1 or 2, characterized in that the openings- (lä, 14 'or l5) in the valve sleeve (9) resp. the compressed gas line (7) are arranged as elongate slots. 4. Tvångsstyrd ljudalstrare enligt något av krav l - 3, k ä ngn e t e c k n a d av att tryckgasledningen (7) med der _därpå roterbart lagrade ventilhylsan (9) sträcker sig diamet- ralt i ett cylindriskt hus som är anordnat för anslutning till resonatorn (1). 9Forced sound generator according to one of Claims 1 to 3, characterized in that the compressed gas line (7) with the valve sleeve (9) rotatably mounted thereon extends diametrically in a cylindrical housing which is arranged for connection to the resonator (1). . 9 5. Tvångsstyrd ljudalstrare enligt krav 4, k ä n n e - t e c k n a d av att drivmotorn (6) är anordnad med sin till ventilhylsan (9) anslutna drivaxel koaxiellt med tryckgasled~ 'ningen.(7) och ventilhylsan (9).Forced sound generator according to claim 4, characterized in that the drive motor (6) is arranged with its drive shaft connected to the valve sleeve (9) coaxially with the pressurized gas line (7) and the valve sleeve (9).
SE8007150A 1980-10-13 1980-10-13 FORCED CONTROL SOUND STRUCTORS FOR THE INFRALUE AREA SE425597B (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
SE8007150A SE425597B (en) 1980-10-13 1980-10-13 FORCED CONTROL SOUND STRUCTORS FOR THE INFRALUE AREA
DE8181902814T DE3174066D1 (en) 1980-10-13 1981-10-13 Positively controlled sound generator
PCT/SE1981/000296 WO1982001328A1 (en) 1980-10-13 1981-10-13 Positively controlled sound generator
AT81902814T ATE18515T1 (en) 1980-10-13 1981-10-13 POSITIVE CONTROLLED SOUND GENERATOR.
EP81902814A EP0069741B1 (en) 1980-10-13 1981-10-13 Positively controlled sound generator
DK250482A DK152412C (en) 1980-10-13 1982-06-03 FORCULATED SOUND MAKING
NO821858A NO152589C (en) 1980-10-13 1982-06-04 FORCED SOUND MOVEMENTS.
FI823866A FI71622C (en) 1980-10-13 1982-11-11 Forced controlled audio generators.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8007150A SE425597B (en) 1980-10-13 1980-10-13 FORCED CONTROL SOUND STRUCTORS FOR THE INFRALUE AREA

Publications (2)

Publication Number Publication Date
SE8007150L SE8007150L (en) 1982-04-14
SE425597B true SE425597B (en) 1982-10-18

Family

ID=20341967

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8007150A SE425597B (en) 1980-10-13 1980-10-13 FORCED CONTROL SOUND STRUCTORS FOR THE INFRALUE AREA

Country Status (6)

Country Link
EP (1) EP0069741B1 (en)
DK (1) DK152412C (en)
FI (1) FI71622C (en)
NO (1) NO152589C (en)
SE (1) SE425597B (en)
WO (1) WO1982001328A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004953A1 (en) * 1985-01-16 1987-08-27 Kockum Sonics Ab Apparatus for generating in particular low-frequency sound
WO1988003995A1 (en) * 1986-11-28 1988-06-02 Svenska Rotor Maskiner Ab A method for producing pressure pulses in a mass of gas and a device for performing the method
WO1989011042A1 (en) * 1988-05-05 1989-11-16 Birger Pettersson A method for producing pressure pulses in a mass of gas and a device for performing the method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE462374B (en) * 1988-06-29 1990-06-18 Infrasonik Ab CONTROL-CONTROLLED MOTOR DRIVE LOW FREQUENCY SOUND GENERATOR
FI972252A (en) * 1997-05-28 1998-11-29 Ulf Krogars Procedure and facility for acoustic cleaning
FI108810B (en) * 2000-07-06 2002-03-28 Nirania Ky Plant and method for streamlining combustion and heat transfer
SE2130031A1 (en) * 2021-02-02 2022-08-03 Mats Anders Olsson A revolving valve for feeding air pulses to a resonance tube for generating low-frequency sound and a method for feeding these pulses at the resonance frequency of the resonance tube

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1323826A (en) * 1919-12-02 Fed Sign System Siren.
DE245518C (en) *
DE395023C (en) * 1922-12-10 1924-05-14 Max Maag Sound generator according to patent 367934 for the generation of tones of unchangeable pitch
US2407175A (en) * 1939-05-02 1946-09-03 Orlich Peter Echo sounding device
US2634701A (en) * 1948-07-30 1953-04-14 Russell A Gougeon Siren
DE1117923B (en) * 1955-12-16 1961-11-23 Jean Maurice Blanchard Device for generating sound and ultrasonic vibrations in gases and liquids
DE1209781B (en) * 1964-06-08 1966-01-27 Messerschmitt Ag Siren for generating pure sine waves and frequency-modulated sine waves of sound
FR1451123A (en) * 1965-10-26 1966-06-24 Signaling process and hydraulic siren with pulsed signals
DE1274937B (en) * 1967-04-07 1968-08-08 Entwicklungsring Sued G M B H Ultrasonic generator operated with pressure medium
DE2262948C3 (en) * 1972-12-22 1978-10-12 Karl 8000 Muenchen Kolar Compressed air siren
EP0006833B1 (en) * 1978-07-03 1983-09-14 Mats Olsson Konsult Ab Low-frequency sound generator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004953A1 (en) * 1985-01-16 1987-08-27 Kockum Sonics Ab Apparatus for generating in particular low-frequency sound
WO1988003995A1 (en) * 1986-11-28 1988-06-02 Svenska Rotor Maskiner Ab A method for producing pressure pulses in a mass of gas and a device for performing the method
WO1989011042A1 (en) * 1988-05-05 1989-11-16 Birger Pettersson A method for producing pressure pulses in a mass of gas and a device for performing the method

Also Published As

Publication number Publication date
DK152412B (en) 1988-02-29
FI71622C (en) 1987-01-19
NO821858L (en) 1982-06-04
FI823866A0 (en) 1982-11-11
EP0069741A1 (en) 1983-01-19
FI71622B (en) 1986-10-10
WO1982001328A1 (en) 1982-04-29
NO152589C (en) 1985-10-23
DK152412C (en) 1988-07-25
EP0069741B1 (en) 1986-03-12
SE8007150L (en) 1982-04-14
NO152589B (en) 1985-07-15
DK250482A (en) 1982-06-03
FI823866L (en) 1982-11-11

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