WO2009152409A1 - Appareil protégé de l’humidité - Google Patents

Appareil protégé de l’humidité Download PDF

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Publication number
WO2009152409A1
WO2009152409A1 PCT/US2009/047163 US2009047163W WO2009152409A1 WO 2009152409 A1 WO2009152409 A1 WO 2009152409A1 US 2009047163 W US2009047163 W US 2009047163W WO 2009152409 A1 WO2009152409 A1 WO 2009152409A1
Authority
WO
WIPO (PCT)
Prior art keywords
actuator
film
support
humidity
layer
Prior art date
Application number
PCT/US2009/047163
Other languages
English (en)
Inventor
Jeffery Moler
Lawrence Egle
Original Assignee
Parker Hannifin Corporation
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 Parker Hannifin Corporation filed Critical Parker Hannifin Corporation
Publication of WO2009152409A1 publication Critical patent/WO2009152409A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • H02N2/04—Constructional details
    • H02N2/043—Mechanical transmission means, e.g. for stroke amplification
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/88—Mounts; Supports; Enclosures; Casings
    • H10N30/883—Additional insulation means preventing electrical, physical or chemical damage, e.g. protective coatings

Definitions

  • piezoelectric actuators possess several advantages in these applications, including fast response time, proportionality of response, and high force.
  • One type of piezoelectric actuator can be constructed as a "stack" including alternating thin layers of conducting and piezoelectric materials. Each layer of piezoelectric material changes shape in response to a change in the electric field across it, and the sum of these changes produces a small displacement of the stack along a predetermined axis.
  • the support structure housing the actuator passively amplifies the small displacement of the stack into a larger displacement. High efficiency is required during amplification in order to produce a commercially feasible actuator of small size and low cost.
  • the stack can be coated with a water-impermeable substance and/or enclosed in a water- impermeable enclosure such as a sealed metal can protect the stack from the external environment.
  • a water-impermeable substance can be found in JP 9307149 A2, JP 2001102649 A2, and JP 6164011 A2.
  • each one of these references suffers from one or more of the following drawbacks: rigidity of the layer or enclosure can impede the motion of the stack, requiring corrugations or the like to permit expansion and contraction of the stack; manufacture of these devices is complex and expensive; the required electrical connections to the stack can reduce the effectiveness of humidity protection, necessitating for example, the inclusion of a desiccant within the enclosure; and encasing the stack in a metal container or glassy layer can make it difficult to apply a desired predetermined compressive load to the stack.
  • piezoelectric applications such as switches and direct drive devices can be encased in a potting compound
  • devices in which the piezoelectric displacement is amplified by a support are not known to be potted because amplification of displacement must be efficient and essentially free of losses.
  • Encasing the actuator and other moving elements in a potting material attached to the support, or protecting the actuator by other means attached to the support, would be expected by those of skill in the art to substantially degrade actuator performance, particularly at low temperatures known to cause stiffening of many potting materials.
  • FIG. 3 is a perspective view of a second embodiment of the humidity- protected apparatus of the present invention including a layer of a barrier compound and recessed electrical actuator leads;
  • FIGS. 4A and 4B are sectional views of the humidity-protected apparatus of the present invention, drawn about the planes indicated by lines 4A and 4B of FIGS. 2 and 3, respectively;
  • FIG. 10 is a transverse section of the humidity-protected apparatus of FIG. 9.
  • a stack plate 34 formed from a rigid material such as a metal or ceramic can be disposed between the support 12 and the actuator 32, and an optional load screw 38 can be disposed within a threaded opening 40 in the support to contact the actuator 32 or stack plate 34, whereby a predetermined static load can be applied to the actuator 32 by rotation of load screw 38.
  • the apparatus of the present invention can include means for protecting actuator 32 from humidity, moisture, and/or other harmful substances, where the means can be attached to the support 12.
  • the means can be selected to impede or prevent humidity, moisture, and/or other harmful substances from contacting the smart material actuator 32, and can be attached to the support 12.
  • Applicant intends to encompass any structure that performs the same function, including but not limited to a layer of a barrier compound, or one or more films, or both.
  • a barrier layer 36 can coat the surface of the actuator 32 and can form a continuous layer from at least a portion of the actuator surface to at least a portion of the inner surface 26 of the support 12.
  • a "barrier layer” includes at least one barrier compound capable of impeding the passage of moisture, humidity, and/or other harmful substances.
  • a "continuous layer” refers to an unbroken portion of a barrier layer that extends from at least a portion of the surface of actuator 32 to at least a portion of inner surface 24.
  • the barrier layer 36 fills or substantially fills the opening in the support.
  • the barrier layer can fill the portion of the opening adjacent to integral flexing portions 20,22.
  • a "barrier compound” includes a solid or semi-solid compound capable of fulfilling the function of a barrier layer.
  • Films suitable for use in the present invention can include, but are not limited to: coated polyesters, such a Mylar, optionally including a coating of aluminum oxide (AI 2 O 3 ), silicon oxide (SiO x ,), polyvinylidene chloride, or polyvinyl alcohol, a 48 gauge biaxially oriented polyester including an aluminum oxide coating; polypropylenes or optionally oriented polypropylenes; nylons including biaxially oriented nylons; chlorotetrafluoroethylene as a homopolymer or chlorotetrafluoroethylene copolymers, for example ethylene- chlorotetrafluoroethylene copolymers; liquid crystal polymers optionally coextruded with a second component such as a polyolefin; cyclic olefin copolymers optionally blended, for example, with polyethylene; metal films such as stainless steel films, or metallized polymer films such as aluminum metallized films; ethylene-vinyl alcohol coextrudates; and
  • Insulating plate 162 can be formed from a rigid insulator, preferably a ceramic plate.
  • Pin 160 can be insulated from electrical contact with the support by a non-conducting spacer 162 including an aperture with pin 160 disposed therethrough.
  • Force transfer member 24 can include a second aperture through which pin 160 traverses support 12 without contacting the support.
  • An insulating sleeve 168 can optionally be provided to electrically insulate the pin 160 and support 12. The placements of the first and second electrical connection are reversible.
  • Embodiments of the apparatus including both a film and a barrier layer can be constructed by one of several methods in which the film and barrier layer are assembled in either order.
  • the apparatus of the present invention provides some level of containment for electrical failure of the actuator.

Landscapes

  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

L’invention concerne un appareil (10) comprenant une structure de support (12) dotée d’au moins une surface destinée au mouvement par un actionneur matériel intelligent (32), comme un actionneur piézoélectrique. L'actionneur peut être protégé de l'humidité et/ou d'autres substances nocives par, par exemple, une couche continue d'un composé formant barrière en contact avec la structure de support et enrobant l'actionneur, ou au moins un film appliqué sur la structure de support pour entourer l’actionneur, ou les deux. L'invention concerne des procédés pour la protection d'un actionneur.
PCT/US2009/047163 2008-06-13 2009-06-12 Appareil protégé de l’humidité WO2009152409A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US6118208P 2008-06-13 2008-06-13
US61/061,182 2008-06-13

Publications (1)

Publication Number Publication Date
WO2009152409A1 true WO2009152409A1 (fr) 2009-12-17

Family

ID=41213429

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/047163 WO2009152409A1 (fr) 2008-06-13 2009-06-12 Appareil protégé de l’humidité

Country Status (1)

Country Link
WO (1) WO2009152409A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120194037A1 (en) * 2009-10-01 2012-08-02 Parker Hannifin Corporation Apparatus and Method for Harvesting Electrical Energy from Mechanical Motion
EP2537246A4 (fr) * 2010-02-17 2015-04-08 Viking At Llc Actionneur à matière intelligente avec compensateur enfermé
US10276776B2 (en) 2013-12-24 2019-04-30 Viking At, Llc Mechanically amplified smart material actuator utilizing layered web assembly
US10744295B2 (en) 2015-01-13 2020-08-18 ResMed Pty Ltd Respiratory therapy apparatus
WO2020217610A1 (fr) * 2019-04-23 2020-10-29 株式会社サタケ Soupape piézoélectrique et procédé de fabrication de ladite soupape piézoélectrique
KR20220016870A (ko) * 2019-06-05 2022-02-10 가부시끼가이샤 사따께 압전 액추에이터, 압전식 밸브, 및 압전 액추에이터의 제조 방법
KR20220027962A (ko) * 2019-06-28 2022-03-08 가부시끼가이샤 사따께 압전식 밸브 및 그 압전식 밸브의 제조 방법
US12004430B2 (en) 2019-04-23 2024-06-04 Satake Corporation Piezoelectric valve and method of manufacturing the piezoelectric valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570095A (en) * 1983-10-11 1986-02-11 Nec Corporation Mechanical amplification mechanism combined with piezoelectric elements
US6211602B1 (en) * 1997-06-24 2001-04-03 Minolta Co., Ltd. Actuator using electromechanical transducer capable of being used in high temperature and high humidity environment and apparatus having the same
US20040124747A1 (en) * 2001-01-29 2004-07-01 Bugel John Anthony Apparatus for moving folded-back arms having a pair of opposing surfaces in response to an electrical activation
WO2008037632A1 (fr) * 2006-09-26 2008-04-03 Siemens Aktiengesellschaft Dispositif d'entraînement d'actionneur de corps fixe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570095A (en) * 1983-10-11 1986-02-11 Nec Corporation Mechanical amplification mechanism combined with piezoelectric elements
US6211602B1 (en) * 1997-06-24 2001-04-03 Minolta Co., Ltd. Actuator using electromechanical transducer capable of being used in high temperature and high humidity environment and apparatus having the same
US20040124747A1 (en) * 2001-01-29 2004-07-01 Bugel John Anthony Apparatus for moving folded-back arms having a pair of opposing surfaces in response to an electrical activation
WO2008037632A1 (fr) * 2006-09-26 2008-04-03 Siemens Aktiengesellschaft Dispositif d'entraînement d'actionneur de corps fixe

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120194037A1 (en) * 2009-10-01 2012-08-02 Parker Hannifin Corporation Apparatus and Method for Harvesting Electrical Energy from Mechanical Motion
EP2537246A4 (fr) * 2010-02-17 2015-04-08 Viking At Llc Actionneur à matière intelligente avec compensateur enfermé
US10276776B2 (en) 2013-12-24 2019-04-30 Viking At, Llc Mechanically amplified smart material actuator utilizing layered web assembly
US10744295B2 (en) 2015-01-13 2020-08-18 ResMed Pty Ltd Respiratory therapy apparatus
KR102633886B1 (ko) * 2019-04-23 2024-02-05 가부시끼가이샤 사따께 압전식 밸브 및 그 압전식 밸브의 제조 방법
WO2020217610A1 (fr) * 2019-04-23 2020-10-29 株式会社サタケ Soupape piézoélectrique et procédé de fabrication de ladite soupape piézoélectrique
JP2020180628A (ja) * 2019-04-23 2020-11-05 株式会社サタケ 圧電式バルブ及び該圧電式バルブの製造方法
CN113728547A (zh) * 2019-04-23 2021-11-30 株式会社佐竹 压电式阀以及该压电式阀的制造方法
KR20220002378A (ko) * 2019-04-23 2022-01-06 가부시끼가이샤 사따께 압전식 밸브 및 그 압전식 밸브의 제조 방법
US12004430B2 (en) 2019-04-23 2024-06-04 Satake Corporation Piezoelectric valve and method of manufacturing the piezoelectric valve
JP7254285B2 (ja) 2019-04-23 2023-04-10 株式会社サタケ 圧電式バルブ及び該圧電式バルブの製造方法
EP3961905A4 (fr) * 2019-04-23 2023-08-30 Satake Corporation Soupape piézoélectrique et procédé de fabrication de ladite soupape piézoélectrique
KR20220016870A (ko) * 2019-06-05 2022-02-10 가부시끼가이샤 사따께 압전 액추에이터, 압전식 밸브, 및 압전 액추에이터의 제조 방법
KR102616954B1 (ko) 2019-06-05 2023-12-21 가부시끼가이샤 사따께 압전 액추에이터, 압전식 밸브, 및 압전 액추에이터의 제조 방법
KR102650263B1 (ko) 2019-06-28 2024-03-21 가부시끼가이샤 사따께 압전식 밸브 및 그 압전식 밸브의 제조 방법
KR20220027962A (ko) * 2019-06-28 2022-03-08 가부시끼가이샤 사따께 압전식 밸브 및 그 압전식 밸브의 제조 방법

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