EP0608403B1 - Geräuschabsorbierende zusammensetzung für das aufhängungssystem von kompressoren, motoren und ähnlichem - Google Patents

Geräuschabsorbierende zusammensetzung für das aufhängungssystem von kompressoren, motoren und ähnlichem Download PDF

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Publication number
EP0608403B1
EP0608403B1 EP93917466A EP93917466A EP0608403B1 EP 0608403 B1 EP0608403 B1 EP 0608403B1 EP 93917466 A EP93917466 A EP 93917466A EP 93917466 A EP93917466 A EP 93917466A EP 0608403 B1 EP0608403 B1 EP 0608403B1
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EP
European Patent Office
Prior art keywords
composite
suspension system
noise absorbing
peroxide
compound
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP93917466A
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English (en)
French (fr)
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EP0608403A1 (de
Inventor
Rogerio Sangoi
Rosangela Maria Machado
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Empresa Brasileira de Compressores SA
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Empresa Brasileira de Compressores SA
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Publication date
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Publication of EP0608403A1 publication Critical patent/EP0608403A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0044—Pulsation and noise damping means with vibration damping supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/127—Mounting of a cylinder block in a casing

Definitions

  • the present invention refers to a noise absorbing composite, which is chemically and physically resistant, for a suspension system usually employed in compressors, motors or any other similar apparatus of hermetic construction, which functioning causes vibrations, associated with undesirable high frequency noises.
  • Said material is particularly applied in reciprocating hermetic compressors used in refrigerating units.
  • Reciprocating hermetic compressors are conventionally provided with a suspension system, which uses springs or other adequate means to insulate the vibrations of the motor-pump assembly from its hermetic case.
  • the hermetic compressor presents its motor-pump assembly fastened through suspension metallic springs, which are attached to the upper portion of the compressor case and which functions under tension, or through supporting springs, which are attached under compression to the base of the case.
  • the sound-absorbing elastomeric systems of the state of the art do not present such characteristics of physical and chemical resistance, and undesirable high frequency noises are often present substantially soon in their useful lives, due to thermal and/or chemical decomposition and/or deformations in the noise absorbing means which are used.
  • the known elastomeric systems present limited sound-absorbing capacity, according to assays carried out by the inventor of the present invention with several known products, such as: acrylic-ethylene copolymers, halogenated hydrocarbons, butadienes and acrylonitrilebutadienes in suspension components having the same geometry, in which the values obtained for the total reduction of noise in the compressor were of about 1-3 decibels.
  • a noise absorbing composite for the suspension system of a reciprocating hermetic compressor, said suspension system being of the type defined by metallic helical springs, which interconnect the fixed case of a hermetic compressor with its motor-pump assembly, usually with undesirable high frequency noises, said noise-absorbing composite being defined by a portion of a viscoelastic material, in close and permanent contact with a substantial portion of said spring surface, said viscoelastic material at least comprising:
  • the utilization of the proposed material is a resource for considerably improving the quality of a refrigerating unit, in a low cost, as well as contributing to improve the environmental conditions, by eliminating undesirable noises.
  • the suspension system of the motor-pump assembly 1 in the case 2 of a reciprocating hermetic compressor may present two basic constructive dispositions: suspension metallic springs 3A, which are attached to the upper part of the case 2 of the compressor and which operate under tension; and supporting metallic springs 3B, which are attached under compression to the base of the case 2.
  • suspension metallic springs 3A which are attached to the case 2, through supporting means 5 welded to the upper part of said case.
  • lubricant oil 6 which can be mineral or synthetic and whose chemical material usually presents highly aggressive components for most elastomeric materials in the form of organic compounds, whether they are hydrogenated or non-hydrogenated, and/or sulphonated or non-sulphonated, or others.
  • the proposed material besides having remarkable chemical and thermal resistance, under temperatures up to 200°C (392°F), associated with a unique dimensional constancy, allows a reduction in the noise amplitude in the frequency with of 400 to 8,000 Hz, and a total noise reduction in the compressor of about 4 decibels, such characteristics lasting during the whole useful life of the compressor.
  • a noise absorbing composite for a suspension system of reciprocating hermetic compressors of the present invention can be applied to a spring, which interconnects the motor-pump assembly 1 of the compressor with the case 2 thereof, said composite having the form of a cylindrical plug 10, which is attached internally to said spring 3, by the simultaneous radial action of the partial fitting of the internal surface of the wire of the spring 3 against the external contact surface of said plug of the sound-absorbing material 10 of the invention, together with a resilient compression of said plug against said spring 3, in order to allow a permanent contact between both surfaces, thus assuring the mutual retention of said spring 3 and plug 10.
  • the noise absorbing composite of the present invention presents the form of an elongated plug 20, of a substantially cylindrical shape, dimensioned to be fitted within the spring 3, with its lateral wall exerting a certain radial compression over the coils of said spring.
  • Such compression is achieved by the own elasticity of the plug 20, and by the level of compression thereof inside the spring and/or by introducing an expander in an axial bore 21, which is provided on at least one of the ends of said plug 20.
  • the noise absorbing composite can present the following alternative forms:
  • the noise absorbing composite for the suspension system of reciprocating hermetic compressors of this invention which has a substantially viscoelastic consistency, which presents the aforementioned advantages and which can be applied as described above, comprises a main elastomeric portion, defined by 100 parts of a compound consisting of: polysiloxanes, tetracyclosiloxanes, pentacyclosiloxanes or mixtures thereof, said main elastomeric portion preferably comprising 100 parts of a fluorinated polysiloxane. If any alternative compound is used, it will be incorporated in the same amount.
  • a portion of vulcanization is incorporated, defined by 0.2 to 6.0 phr (parts by 100 parts of elastomer) and, preferably, from 0.8 to 1.3 phr of a compound selected from the group consisting of di-cumile, 2.5-bis (ter-butyl) peroxide, 2.5-dimethylhexane, or mixture thereof.
  • the vulcanization portion comprises from 0.8 to 1.3 phr of di-cumile peroxide, with 93 to 99% purity, preferably 99% purity.
  • a basic viscoelastic material such as that obtained above, presents a hardness between 20 and 50 shore A, preferably between 30 and 40 shore A, where the maximum hardness corresponds to a maximum specified incorporation of the vulcanization portion in the basic viscoelastic material, and vice-versa.
  • Said basic viscoelastic material actually has the advantages required for the material in question, except for its thermal resistance, which is still unsatisfactory in extreme operational conditions.
  • thermo-resistant portion shall be incorporated in the basic viscoelastic material, said portion being defined from 0.8 to 1.3 phr of polysiloxanes, whose maximum amount imparts maximum resistance, under high temperatures, to the noise absorbing composite of the present invention, and vice-versa, within the preestablished limits.
  • the proposed absorbing composite depends on a specific mixture, within the limits established for each component, for each application of the compressor, being thus determined case by case, due to the range of requirements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Claims (6)

  1. Geräuschabsorbierende Zusammensetzung für das Aufhängungssystem von Kompressoren, Motoren und ähnlichen Geräten, die in einem Aufhängungssystem des Typs mit metallischen Schraubenfedern (3A, 3B) eingesetzt werden kann, wobei die Federn ein feststehendes Gehäuse (2) eines hermetisch geschlossenen Kompressors mit dessen Motor-Pumpen-Anordnung (1) verbinden und letztere einer Vibrationsbewegung hoher Frequenz unterliegt und wobei die geräuschabsorbierende Zusammensetzung (10) durch einen Abschnitt aus viskoelastischem Material festgelegt wird, der in engem und dauerndem Kontakt mit einem erheblichen Teil der Oberfläche der Federn (3A, 3B) steht, dadurch gekennzeichnet, daß das viskoelastische Material (10) umfaßt:
    - einen elastomeren Hauptabschnitt, der aus 100 Teilen einer Verbindung besteht, die aus der Gruppe ausgewählt ist, welche aus folgenden Stoffen besteht: Polysiloxan, Tetracyclosiloxan, Pentacyclosiloxan oder Mischungen derselben;
    - einen aus Vulkanisat bestehenden Abschnitt, der 0,2 bis 6,0 phr (parts per 100 rubber) einer Verbindung aufweist, die aus der Gruppe ausgewählt ist, welche aus folgenden Stoffen besteht: Dicumylperoxid, 2,5-Bis-(tert.-butyl)peroxid, 2,5 Dimethylhexan oder Mischungen derselben;
    - einen wärmebeständigen Abschnitt, der 0,8 bis 1,3 phr einer Polysiloxan-Verbindung aufweist.
  2. Zusammensetzung nach Anspruch 1, dadurch gekennziechnet, daß die Verbindung des elastomeren Hauptabschnitts halogeniert ist.
  3. Zusammensetzung nach Anspruch 2, dadurch gekennzeichnet, daß der elastomere Hauptabschnitt fluoriertes Polysiloxan enthält.
  4. Zusammensetzung nach Anspruch 1, dadurch gekennzeichnet, daß der aus Vulkanisat bestehende Abschnitt 99% reines Dicumylperoxid enthält.
  5. Zusammensetzung nach Anspurch 1, dadurch gekennzeichnet, daß ihre Härte zwischen 30 und 40 Shore A liegt.
  6. Zusammensetzung nach Anspruch 1, dadurch gekennzeichnet, daß sie eine thermische Zersetzungstemperatur über 200°C (392°F) aufweist.
EP93917466A 1992-08-20 1993-08-19 Geräuschabsorbierende zusammensetzung für das aufhängungssystem von kompressoren, motoren und ähnlichem Expired - Lifetime EP0608403B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BR9203332A BR9203332A (pt) 1992-08-20 1992-08-20 Composicao absorvedora de ruidos para sistema de suspensao de compressores,motores e dispositivos similares
BR9203332 1992-08-20
PCT/BR1993/000028 WO1994004822A1 (en) 1992-08-20 1993-08-19 Noise absorbing composite for the suspension system of compressors, motors and similar apparatus

Publications (2)

Publication Number Publication Date
EP0608403A1 EP0608403A1 (de) 1994-08-03
EP0608403B1 true EP0608403B1 (de) 1996-04-03

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EP93917466A Expired - Lifetime EP0608403B1 (de) 1992-08-20 1993-08-19 Geräuschabsorbierende zusammensetzung für das aufhängungssystem von kompressoren, motoren und ähnlichem

Country Status (6)

Country Link
EP (1) EP0608403B1 (de)
JP (1) JPH07500402A (de)
CN (1) CN1085581A (de)
BR (1) BR9203332A (de)
DE (1) DE69302082D1 (de)
WO (1) WO1994004822A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6023937A (en) * 1996-12-11 2000-02-15 Carrier Corporation Compressor mounting arrangement
US6362009B1 (en) 1997-11-21 2002-03-26 Merck & Co., Inc. Solid phase synthesis of heterocycles
DE102007027978A1 (de) * 2007-06-19 2008-12-24 Schneider Druckluft Gmbh Kompressorvorrichtung
KR101484539B1 (ko) * 2008-10-27 2015-01-20 엘지전자 주식회사 밀폐형 압축기 및 이를 구비한 냉동기기
CN104638817B (zh) 2015-02-15 2018-05-29 莱克电气股份有限公司 吸尘器的电机降噪结构及吸尘器
CN105406677B (zh) * 2015-11-25 2019-03-05 歌尔股份有限公司 一种线性振动马达
BR102017010629B1 (pt) * 2017-05-19 2024-04-30 Nidec Global Appliance Brasil Ltda Compressor hermético de deslocamento positivo

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647641A (en) * 1984-12-05 1987-03-03 Pennwalt Corporation Curable organopolysiloxane compositions
BR9001772A (pt) * 1990-04-06 1991-11-05 Brasil Compressores Sa Sistema de suspensao para compressor hermetico alternativo

Also Published As

Publication number Publication date
BR9203332A (pt) 1994-03-01
DE69302082D1 (de) 1996-05-09
JPH07500402A (ja) 1995-01-12
CN1085581A (zh) 1994-04-20
WO1994004822A1 (en) 1994-03-03
EP0608403A1 (de) 1994-08-03

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