WO2000054550A2 - Haut-parleur de grande efficacite et a aimant mobile - Google Patents

Haut-parleur de grande efficacite et a aimant mobile Download PDF

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Publication number
WO2000054550A2
WO2000054550A2 PCT/US2000/006128 US0006128W WO0054550A2 WO 2000054550 A2 WO2000054550 A2 WO 2000054550A2 US 0006128 W US0006128 W US 0006128W WO 0054550 A2 WO0054550 A2 WO 0054550A2
Authority
WO
WIPO (PCT)
Prior art keywords
driver
spring
piston
thermoacoustic
suspension
Prior art date
Application number
PCT/US2000/006128
Other languages
English (en)
Other versions
WO2000054550A3 (fr
Inventor
Steven L. Garrett
Robert W. Smith
Robert M. Keolian
Original Assignee
The Penn State Research Foundation
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 The Penn State Research Foundation filed Critical The Penn State Research Foundation
Priority to PCT/US2000/006128 priority Critical patent/WO2000054550A2/fr
Priority to AU36209/00A priority patent/AU3620900A/en
Publication of WO2000054550A2 publication Critical patent/WO2000054550A2/fr
Publication of WO2000054550A3 publication Critical patent/WO2000054550A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
    • F25B9/145—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle pulse-tube cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/14—Compression machines, plants or systems characterised by the cycle used 
    • F25B2309/1403—Pulse-tube cycles with heat input into acoustic driver
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/14—Compression machines, plants or systems characterised by the cycle used 
    • F25B2309/1404—Pulse-tube cycles with loudspeaker driven acoustic driver
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/14—Compression machines, plants or systems characterised by the cycle used 
    • F25B2309/1405—Pulse-tube cycles with travelling waves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/14—Compression machines, plants or systems characterised by the cycle used 
    • F25B2309/1407—Pulse-tube cycles with pulse tube having in-line geometrical arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/14—Compression machines, plants or systems characterised by the cycle used 
    • F25B2309/1412—Pulse-tube cycles characterised by heat exchanger details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/14—Compression machines, plants or systems characterised by the cycle used 
    • F25B2309/1416—Pulse-tube cycles characterised by regenerator stack details

Definitions

  • the heat pumping power of these new acoustic refrigerators depends upon the square of the acoustic amplitude — a doubling of acoustic pressure amplitude corresponds to four times the useful heat- pumping power. It is therefore important to be able to produce very high amplitude sound waves for use in such refrigeration devices.
  • the spring constant, k rect , of the rectangular clamped-guided cantilever is the ratio of the force, F, to the displacement of the movable end, y A [m], generated by that force applied to the movable end.
  • F force
  • y A displacement of the movable end
  • t thickness
  • Fig. 6 is a plan view of another embodiment of a bow-tie beam incorporating a left-handed twist for relief of arc-length tension;
  • Fig. 1 is a cross-sectional diagram of a complete thermoacoustic driver, except for a resonator, to which it would be attached that is not shown.
  • the driver includes an electrodynamic motor, which could be of the moving-coil or moving-magnet type.
  • Two suspension spring structures 60, 61 are rigidly clamped between the driver suspension basket 14 and the piston 30 to provide additional restoring force and enhance the stiffness of the motor. Any number of spring structures could be used since the spring structures are rotated with respect to each other to avoid interference. Although not visible in Fig. 1, in this embodiment each of the two spring structures 60, 61 that are used has sixteen legs, as shown in Fig. 2. The first spring structure 60 curves toward the suspension basket 14 at the point nearest to the piston 30 and the second spring structure 61 curves away from the suspension basket 14 at the point nearest to the piston 30.
  • the driver suspension basket 14 contains a sufficient number of pressure feed-through ports 17 (only one is shown) to allow the electrical leads for the driver coil and the enclosed sensor electronics to pass from the pressurized interior of the rear of driver suspension basket 14, to the amplifiers and instrumentation located at ambient atmospheric conditions, outside the driver and the resonator.
  • An O-ring groove 18 is a means to provide a high-pressure, gas-tight seal to the resonator.
  • a small leakage passage 15, is provided to equilibrate any static gas pressure difference between the front and rear sides of driver suspension basket
  • the mechanical side of the motor is represented by the three equivalent electrical components to the right of the transformer 80.
  • the mechanical stiffness of the motor 10 is represented by a first inductor 94 having an inductance which is the reciprocal of the motor stiffiiess constant, k mot0 r.
  • the mechanical stiffness of suspension spring structure is represented by a second inductor 98 having an electrical inductance which is the reciprocal of the suspension spring stiffness constant, k spr jng-
  • the moving mass of the driver is represented by a capacitor 92, which has an electrical capacitance that is equal to the total driver moving mass, which includes the sum of masses, M, of the driver moving part 11 , the piston 30, and some fraction of the mass of the suspension spring structures.

Abstract

Cette invention concerne un actionneur thermo-acoustique qui comprend un moteur électrodynamique linéaire comportant des bornes électriques et une partie mobile, un boîtier de suspension de l'actionneur, un piston et, enfin, un dispositif augmentant la rigidité permettant d'augmenter la fréquence de résonance mécanique du moteur électrodynamique sans réduire la course du piston. L'augmentation de la rigidité se fait en utilisant des structures de ressorts de suspension spécialement optimisées et/ou en associant un ou plusieurs inducteurs électriques aux bornes électriques de l'actionneur. L'augmentation de la rigidité par des ressorts mécaniques permet d'incorporer une ou plusieurs structures en étoile de mer qui s'étendent entre le boîtier de suspension de l'actionneur et le piston, et qui sont fixées rigidement aux deux. Ces structures en étoile de mer comprennent des pattes radiales qui consistent en des ressorts à lames ou en des rayons de largeurs variables. La forme des rayons ainsi que la forme de la structure de ressorts dans son ensemble sont optimisées afin d'accroître la raideur en flexion ou en torsion, et de soulager la tension en arc dans les limites de la rentabilité. Dans un mode de réalisation, deux rayons modifiés, décalés et triangulaires (trapézoïdaux) sont connectés par l'intermédiaire d'une section médiane droite et forment un rayon en forme de noeud papillon.
PCT/US2000/006128 1999-03-09 2000-03-09 Haut-parleur de grande efficacite et a aimant mobile WO2000054550A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2000/006128 WO2000054550A2 (fr) 1999-03-09 2000-03-09 Haut-parleur de grande efficacite et a aimant mobile
AU36209/00A AU3620900A (en) 1999-03-09 2000-03-09 High-efficiency moving-magnet loudspeaker

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12398499P 1999-03-09 1999-03-09
US60/123,684 1999-03-12
PCT/US2000/006128 WO2000054550A2 (fr) 1999-03-09 2000-03-09 Haut-parleur de grande efficacite et a aimant mobile

Publications (2)

Publication Number Publication Date
WO2000054550A2 true WO2000054550A2 (fr) 2000-09-14
WO2000054550A3 WO2000054550A3 (fr) 2000-12-21

Family

ID=42371952

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/006128 WO2000054550A2 (fr) 1999-03-09 2000-03-09 Haut-parleur de grande efficacite et a aimant mobile

Country Status (2)

Country Link
AU (1) AU3620900A (fr)
WO (1) WO2000054550A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8295536B2 (en) 2010-03-31 2012-10-23 Bose Corporation Moving magnet levered loudspeaker
US8295537B2 (en) 2010-03-31 2012-10-23 Bose Corporation Loudspeaker moment and torque balancing
US9055370B2 (en) 2012-08-31 2015-06-09 Bose Corporation Vibration-reducing passive radiators

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858441A (en) * 1987-03-02 1989-08-22 The United States Of America As Represented By The United States Department Of Energy Heat-driven acoustic cooling engine having no moving parts
US5647216A (en) * 1995-07-31 1997-07-15 The United States Of America As Represented By The Secretary Of The Navy High-power thermoacoustic refrigerator
US5901556A (en) * 1997-11-26 1999-05-11 The United States Of America As Represented By The Secretary Of The Navy High-efficiency heat-driven acoustic cooling engine with no moving parts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858441A (en) * 1987-03-02 1989-08-22 The United States Of America As Represented By The United States Department Of Energy Heat-driven acoustic cooling engine having no moving parts
US5647216A (en) * 1995-07-31 1997-07-15 The United States Of America As Represented By The Secretary Of The Navy High-power thermoacoustic refrigerator
US5901556A (en) * 1997-11-26 1999-05-11 The United States Of America As Represented By The Secretary Of The Navy High-efficiency heat-driven acoustic cooling engine with no moving parts
US5996345A (en) * 1997-11-26 1999-12-07 The United States Of America As Represented By The Secretary Of The Navy Heat driven acoustic power source coupled to an electric generator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8295536B2 (en) 2010-03-31 2012-10-23 Bose Corporation Moving magnet levered loudspeaker
US8295537B2 (en) 2010-03-31 2012-10-23 Bose Corporation Loudspeaker moment and torque balancing
US9055370B2 (en) 2012-08-31 2015-06-09 Bose Corporation Vibration-reducing passive radiators

Also Published As

Publication number Publication date
WO2000054550A3 (fr) 2000-12-21
AU3620900A (en) 2000-09-28

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