JP2005273463A

JP2005273463A - Scroll compressor

Info

Publication number: JP2005273463A
Application number: JP2004083930A
Authority: JP
Inventors: Hirosuke Shimazu; 裕輔島津; Kenji Yano; 賢司矢野; Atsushi Osada; 淳長田; Masaaki Sugawa; 昌晃須川
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2004-03-23
Filing date: 2004-03-23
Publication date: 2005-10-06

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scroll compressor with reduced noise, for maintaining high reliability of a bearing, improving assembly property, and suppressing a cost. <P>SOLUTION: The scroll compressor comprises: a sealed vessel 9; a compression element having a fixed scroll 1 and an oscillating scroll 2; a drive element having an electric motor 5, and a main shaft 3 transmitting a driving force of the electric motor 5; a main support element having a main frame 4 supporting a main shaft on a compression element side, viewed from the drive element; a sub support element having a sub frame 7 supporting the main shaft on the compression element, viewed from the main shaft; and a joint member 8 whose one side is sandwiched between at least two fixing parts out of the compression element constituting a compressor assembly, the drive element, the main support element, and the sub support element so that the one end is assembled integrally with the compressor assembly, and whose other side is fixed to an inner face of the sealed vessel. A holding member stuck to a stator of the electric motor of the drive element is provided, and the main support element and the sub support element are fixed to the holding member 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、冷凍・空調機等に使用されるスクロール圧縮機に関するものである。 The present invention relates to a scroll compressor used for a refrigeration / air conditioner or the like.

従来のスクロール圧縮機は、固定スクロール及び揺動スクロール等の部品を備えた圧縮要素、電動機及び電動機の駆動力を伝達する主軸等の部品を備えた駆動要素、及び主軸を支持するフレーム等の部品を備えた支持要素からなる圧縮機組立体と、上部が開口したカップ状の結合部材と、密閉容器とから構成される。圧縮機組立体と密閉容器は直接組み合わせるのではなく、カップ状の結合部材を介して間接的に結合している。また従来の圧縮機は駆動要素を挟む形で２つの支持要素を有し、上記主軸を２箇所で支持する。さらに圧縮機組立体と結合部材の結合形態は、圧縮機組立体を構成する少なくとも２部品の固定部間に結合部材が挟み込まれている。
これらにより、結合部材はある周波数帯の振動を減衰させる機能を有するように形状を設定するため、圧縮機組立体で発生する振動を減衰させて密閉容器に伝達させるため、低騒音が実現される。また上記主軸の２箇所の支持を精度よく行うと、軸受信頼性が確保される。さらに結合部材、駆動要素、支持要素を同時に固定することにより、部品点数が少なく、組立性向上・低コストが実現できる（例えば、特許文献１参照。） A conventional scroll compressor includes a compression element including parts such as a fixed scroll and a swing scroll, a drive element including parts such as an electric motor and a main shaft that transmits driving force of the electric motor, and parts such as a frame that supports the main shaft. The compressor assembly is composed of a support element including a cup-shaped coupling member having an open top, and a closed container. The compressor assembly and the hermetic container are not directly combined but indirectly coupled through a cup-shaped coupling member. Further, the conventional compressor has two support elements sandwiching the drive element, and supports the main shaft at two locations. Furthermore, as for the coupling form of the compressor assembly and the coupling member, the coupling member is sandwiched between at least two fixed parts constituting the compressor assembly.
As a result, the shape of the coupling member is set so as to have a function of attenuating vibrations in a certain frequency band, and vibration generated in the compressor assembly is attenuated and transmitted to the sealed container, so that low noise is realized. Further, bearing reliability is ensured when the two main shafts are accurately supported. Further, by fixing the coupling member, the drive element, and the support element at the same time, the number of parts is reduced, and an improvement in assembly and low cost can be realized (see, for example, Patent Document 1).

特開平１１−１３６５４号公報Japanese Patent Laid-Open No. 11-13654

従来のスクロール圧縮機では、駆動要素のうち主軸の軸受部の信頼性確保のために、圧縮機組立工程において、主支持要素の主軸受と副支持要素の副軸受との相対的な位置関係である平行度、同軸度に高精度を要求される。しかし主支持要素と副支持要素の間にある駆動要素の固定子は、一般的に積層鋼板より構成されるため部品単体での平行度がよくなく、主支持要素の主軸受と副支持要素の副軸受の同軸度、平行度を高精度に組立てるには困難が生じる。
また類似機種で駆動要素の電動機の形状が異なると、形状の異なる程度に応じて駆動要素のその他の部品、主支持要素、副支持要素、結合部材の形状が異ならざるを得ないので、共通部品が少なく、類似部品点数が増大し、類似機種全体での部品管理・組立段換え等が発生し組立性が悪化し、その結果部品単体・圧縮機全体ともに高コストとなる問題点があった。 In the conventional scroll compressor, in order to ensure the reliability of the bearing portion of the main shaft among the drive elements, the relative positional relationship between the main bearing of the main support element and the sub bearing of the sub support element is used in the compressor assembly process. High accuracy is required for certain parallelism and coaxiality. However, since the stator of the drive element between the main support element and the sub support element is generally composed of laminated steel plates, the parallelism of the parts alone is not good, and the main bearing and the sub support element of the main support element are not good. Difficulty arises in assembling the sub-bearings with high accuracy in coaxiality and parallelism.
Also, if the shape of the drive element motor is different for similar models, the shape of the other parts of the drive element, the main support element, the sub support element, and the coupling member must be different depending on the degree of the shape. However, there is a problem that the number of similar parts increases, parts management and assembly changeover occur in the whole similar model, and the assemblability deteriorates. As a result, both the single part and the whole compressor are expensive.

この発明は、上記のよう課題を解決するためになされたもので、軸受の高信頼性を保ちつつ組立性を向上させ、かつ類似機種を含めた全体のコストを抑制することができる低騒音のスクロール圧縮機を得るものである。 The present invention has been made to solve the above-described problems, and can improve the assembling property while maintaining high reliability of the bearing, and can reduce the overall cost including similar models. A scroll compressor is obtained.

この発明に係るスクロール圧縮機は、密閉容器と、固定スクロール及び揺動スクロール等を備えた圧縮要素と、電動機及び電動機の駆動力を伝達する主軸等を備えた駆動要素と、主軸を駆動要素から見て圧縮要素側で支持する主フレーム等を備えた主支持要素と、主軸を駆動要素から見て圧縮要素の反対側で支持するサブフレーム等を備えた副支持要素と、一方を圧縮機組立体を構成する圧縮要素、駆動要素、主支持要素及び副支持要素のうち少なくともいずれか二つの固定部間に挟み込まれて圧縮機組立体と一体に組み付けられ、他方を密閉容器の内側面に固定される結合部材とからなるものにおいて、駆動要素のうち電動機の固定子に固着される保持部材を有し、主支持要素と副支持要素が保持部材と固定されてなるものである。 A scroll compressor according to the present invention includes a hermetic container, a compression element including a fixed scroll and an orbiting scroll, a driving element including a motor and a main shaft that transmits a driving force of the motor, and the main shaft from the driving element. A main support element having a main frame and the like that is supported on the compression element side as viewed, a sub support element having a subframe and the like that supports the main shaft on the opposite side of the compression element when viewed from the drive element, and one of the compressor assemblies The compression element, the drive element, the main support element, and the sub-support element that constitute the compressor are sandwiched between at least two fixed portions and assembled integrally with the compressor assembly, and the other is fixed to the inner surface of the sealed container. The connecting member includes a holding member fixed to the stator of the electric motor among the driving elements, and the main support element and the sub support element are fixed to the holding member.

この発明のスクロール圧縮機は、駆動要素のうち電動機固定子に固着される保持部材を備え、主支持要素と副支持要素が保持部材と固定されるように構成したので、主支持要素の主軸受と副支持要素の副軸部の同軸度、平行度を高精度に組立てる作業性向上、なおかつ類似機種全体でのコスト抑制という効果を有する。 The scroll compressor according to the present invention includes a holding member fixed to the electric motor stator among the drive elements, and is configured such that the main support element and the sub support element are fixed to the holding member. In addition, it has the effect of improving the workability of assembling the coaxiality and parallelism of the auxiliary shaft portion of the auxiliary support element with high accuracy and reducing the cost of similar models as a whole.

実施の形態１．
図１はこの発明の実施の形態１におけるスクロール圧縮機の縦断面図を示すものである。
図１において、固定スクロール１は主フレーム４とボルト等で固定されており、固定スクロール１の台板部１ａの中心付近には吐出ポート１ｃが形成され、台板部１ａの片側には板状渦巻歯１ｂが形成されている。２は揺動スクロールで、台板部２ａの片側には固定スクロール１の板状渦巻歯１ｂと同一形状の板状渦巻歯２ｂが形成されている。揺動スクロール２の台板部２ａの板状渦巻歯２ｂと反対側の中心部には中空円筒状のボス部が形成され、このボス部には搖動軸受２ｃが形成されている。また、揺動スクロール２の台板部２ａの上記中空円筒状のボス部と同じ側の外周側にはスラスト面２ｄが形成され、主フレーム４のスラスト軸受４ａと平面接触し摺動可能となっている。 Embodiment 1 FIG.
1 is a longitudinal sectional view of a scroll compressor according to Embodiment 1 of the present invention.
In FIG. 1, a fixed scroll 1 is fixed to a main frame 4 with bolts or the like, a discharge port 1c is formed near the center of a base plate portion 1a of the fixed scroll 1, and a plate-like shape is formed on one side of the base plate portion 1a. A spiral tooth 1b is formed. Reference numeral 2 denotes an orbiting scroll, and a plate-like spiral tooth 2b having the same shape as the plate-like spiral tooth 1b of the fixed scroll 1 is formed on one side of the base plate portion 2a. A hollow cylindrical boss is formed at the center of the base plate 2a of the orbiting scroll 2 on the opposite side of the plate-like spiral tooth 2b, and a peristaltic bearing 2c is formed at this boss. Also, a thrust surface 2d is formed on the outer peripheral side of the base plate portion 2a of the orbiting scroll 2 on the same side as the hollow cylindrical boss portion, and can come into sliding contact with the thrust bearing 4a of the main frame 4 in plane contact. ing.

主フレーム４の中心部には電動機５によって駆動される主軸３を回転可能に支持する主軸受４ｂが形成されている。電動機５は回転子５ａと固定子５ｂによって構成され、回転子５ａは上記主軸３に固着され、固定子５ｂは保持部材６に固着されている。保持部材６は上記主フレーム４のスクロールと反対側に設けられた脚部４ｃと、中心部に主軸３を回転可能に支持する軸受７ａを有するサブフレーム７の脚部７ｂとの間に固定され、圧縮機組立体が構成されている。さらに、密閉容器９の内周部に一端が圧入、焼き嵌め又は溶接により固着され、他端は前記主フレーム４の脚部４ｃと保持部材６との間に挟み込まれたカップ状の結合部材８を有している。この結合部材８は圧縮機組立体と密閉容器９を連結しており、さらに上記保持部材６の下端部６ｂに取付けられた前記サブフレーム７と共にボルトによって一体に締結されている。 A main bearing 4 b that rotatably supports the main shaft 3 driven by the electric motor 5 is formed at the center of the main frame 4. The electric motor 5 includes a rotor 5a and a stator 5b. The rotor 5a is fixed to the main shaft 3, and the stator 5b is fixed to the holding member 6. The holding member 6 is fixed between a leg portion 4c provided on the side opposite to the scroll of the main frame 4 and a leg portion 7b of the subframe 7 having a bearing 7a that rotatably supports the main shaft 3 at the center. A compressor assembly is configured. Further, one end of the airtight container 9 is fixed to the inner peripheral portion by press fitting, shrink fitting or welding, and the other end is sandwiched between the leg portion 4c of the main frame 4 and the holding member 6. have. The connecting member 8 connects the compressor assembly and the sealed container 9 and is fastened together with the sub frame 7 attached to the lower end portion 6b of the holding member 6 by a bolt.

主軸３の揺動スクロール２側端部には、揺動スクロール２の偏心方向と同一方向に偏心した搖動軸部３ａが形成され、揺動スクロール２の搖動軸受２ｃに回転自在に接合されている。吸入管１０は密閉容器９に機密的に固定され、圧縮される前の低圧冷媒ガスを密閉容器９に導く。吐出管１１は密閉容器７に機密的に固定され、圧縮された後の高圧冷媒ガスを密閉容器７外に排出する。 At the end of the main shaft 3 on the side of the orbiting scroll 2, a peristaltic shaft portion 3a that is eccentric in the same direction as the eccentric direction of the orbiting scroll 2 is formed. . The suction pipe 10 is secretly fixed to the sealed container 9 and guides the low-pressure refrigerant gas before being compressed to the sealed container 9. The discharge pipe 11 is securely fixed to the sealed container 7 and discharges the compressed high-pressure refrigerant gas to the outside of the sealed container 7.

従って、上記圧縮機組立体を構成する、主フレーム４、サブフレーム７、保持部材６、結合部材８は高精度に機械加工できるため、主軸受４ｂと副軸受７ａの同軸度・平行度を精度よく、容易に組立てることができ、組立時間が短縮できる。
また類似機種に展開する場合、固定子５ｂは保持部材６を介して主フレーム４、サブフレーム７と固定されているので、電動機５の外径を変えても、保持部材６の内径を変更するだけで他部品は共通化でき、類似機種全体での部品点数を低減、低コスト化が可能である。さらに電動機５のコア長が変化する場合は保持部材６も統一でき、更なる効果を得られる。 Accordingly, since the main frame 4, the sub frame 7, the holding member 6 and the coupling member 8 constituting the compressor assembly can be machined with high accuracy, the coaxiality and parallelism of the main bearing 4b and the sub bearing 7a can be accurately adjusted. It can be assembled easily and the assembly time can be shortened.
Further, when developing to similar models, since the stator 5b is fixed to the main frame 4 and the subframe 7 via the holding member 6, even if the outer diameter of the motor 5 is changed, the inner diameter of the holding member 6 is changed. The other parts can be made common, and the number of parts in the similar models as a whole can be reduced and the cost can be reduced. Furthermore, when the core length of the electric motor 5 changes, the holding member 6 can also be unified, and a further effect can be obtained.

実施の形態２．
図２はこの発明の実施の形態２におけるスクロール圧縮機の縦断面図を示すものである。図２において、実施の形態１と同一又は相当部分には同一符号を付し、その説明を省略する。この実施の形態２では、副軸受７ａは保持部材６の下端部を更に下方に延長して形成した保持体１２に固定されている。従って、主軸受４ｂと副軸受７ａの同軸度・平行度を精度よく保つと同時に、回転子５ａと固定子５ｂのエアギャップを確保することができ、工数低減が実現できる。また部品点数が一つ減るので、主軸受４ｂと副軸受７ａの同軸度・平行度を確保する作業性も更に向上する。 Embodiment 2. FIG.
2 is a longitudinal sectional view of a scroll compressor according to Embodiment 2 of the present invention. In FIG. 2, the same or corresponding parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the second embodiment, the auxiliary bearing 7a is fixed to a holding body 12 formed by extending the lower end portion of the holding member 6 further downward. Accordingly, the coaxiality and parallelism of the main bearing 4b and the sub-bearing 7a can be maintained with high accuracy, and an air gap between the rotor 5a and the stator 5b can be secured, thereby reducing man-hours. Further, since the number of parts is reduced by 1, the workability for ensuring the coaxiality and parallelism of the main bearing 4b and the auxiliary bearing 7a is further improved.

この発明の実施の形態１におけるスクロール圧縮機を示す縦断面図である。It is a longitudinal cross-sectional view which shows the scroll compressor in Embodiment 1 of this invention. この発明の実施の形態２におけるスクロール圧縮機を示す縦断面図である。It is a longitudinal cross-sectional view which shows the scroll compressor in Embodiment 2 of this invention.

符号の説明Explanation of symbols

１固定スクロール
１ａ台板部
１ｂ板状渦巻歯
１ｃ吐出ポート
２搖動スクロール
２ａ台板部
２ｂ板状渦巻歯
２ｃ搖動軸受
２ｄスラスト面
３主軸
３ａ搖動軸部
４主フレーム
４ａスラスト軸受
４ｂ主軸受
４ｃ脚部
５電動機
５ａ回転子
５ｂ固定子
６保持部材
７サブフレーム
７ａ副軸受
７ｂ脚部
８結合部材
９密閉容器
１０吸入管
１１吐出管
１２保持部材
DESCRIPTION OF SYMBOLS 1 Fixed scroll 1a Base plate part 1b Plate-form spiral tooth 1c Discharge port 2 Peristaltic scroll 2a Base plate part 2b Plate-form spiral tooth 2c Peristaltic bearing 2d Thrust surface 3 Main shaft 3a Peristaltic shaft part 4 Main frame 4a Thrust bearing 4b Main bearing 4c Leg Part 5 Electric motor 5a Rotor 5b Stator 6 Holding member 7 Sub frame 7a Sub bearing 7b Leg part 8 Coupling member 9 Sealed container 10 Suction pipe 11 Discharge pipe 12 Holding member

Claims

密閉容器と、固定スクロール及び揺動スクロール等を備えた圧縮要素と、電動機及び電動機の駆動力を伝達する主軸等を備えた駆動要素と、上記主軸を駆動要素から見て圧縮要素側で支持する主フレーム等を備えた主支持要素と、上記主軸を駆動要素から見て圧縮要素の反対側で支持するサブフレーム等を備えた副支持要素と、一方を圧縮機組立体を構成する上記圧縮要素、上記駆動要素、上記主支持要素及び上記副支持要素のうち少なくともいずれか二つの固定部間に挟み込まれて上記圧縮機組立体と一体に組み付けられ、他方を密閉容器の内側面に固定される結合部材とからなるスクロール圧縮機において、上記駆動要素のうち電動機の固定子に固着される保持部材を有し、上記主支持要素と副支持要素が保持部材と固定されていることを特徴とするスクロール圧縮機。 A hermetic container, a compression element including a fixed scroll and an orbiting scroll, a driving element including a motor and a main shaft for transmitting driving force of the motor, and the main shaft is supported on the compression element side when viewed from the driving element. A main support element having a main frame and the like, a sub-support element having a sub-frame and the like for supporting the main shaft on the opposite side of the compression element when viewed from the drive element, and the compression element constituting one of the compressor assemblies, A coupling member that is sandwiched between at least any two fixing portions of the drive element, the main support element, and the sub-support element, is assembled integrally with the compressor assembly, and the other is fixed to the inner surface of the sealed container. A scroll compressor having a holding member fixed to the stator of the electric motor among the driving elements, and the main support element and the sub-support element being fixed to the holding member. Scroll compressor which is characterized.

主支持要素と副支持要素のうち、結合部材を挟み込まないいずれか一方と、駆動要素の保持部材とが一体で構成されることを特徴とする請求項１に記載のスクロール圧縮機。 2. The scroll compressor according to claim 1, wherein one of the main support element and the sub-support element that does not sandwich the coupling member and the holding member of the drive element are configured integrally.

密閉容器と、固定スクロール及び揺動スクロール等を備えた圧縮要素と、電動機及び電動機の駆動力を伝達する主軸等を備えた駆動要素と、上記主軸を駆動要素から見て圧縮要素側で支持する主フレーム等を備えた主支持要素と、上記主軸を駆動要素から見て圧縮要素の反対側で支持するサブフレーム等を備えた副支持要素と、一方を圧縮機組立体を構成する上記圧縮要素、上記駆動要素、上記主支持要素及び上記副支持要素のうち少なくともいずれか二つの固定部間に挟み込まれて上記圧縮機組立体と一体に組み付けられ、他方を密閉容器の内側面に固定される結合部材とからなるスクロール圧縮機において、上記駆動要素のうち電動機の固定子に固着される保持部材を有し、この保持部材の下端部に上記副支持要素が一体で構成されていることを特徴とするスクロール圧縮機。
A hermetic container, a compression element including a fixed scroll and an orbiting scroll, a drive element including a motor and a main shaft for transmitting a driving force of the motor, and the main shaft is supported on the compression element side when viewed from the drive element. A main support element having a main frame and the like, a sub-support element having a sub-frame and the like for supporting the main shaft on the opposite side of the compression element when viewed from the drive element, and the compression element constituting one of the compressor assemblies, A coupling member that is sandwiched between at least any two fixing portions of the drive element, the main support element, and the sub-support element, is assembled integrally with the compressor assembly, and the other is fixed to the inner surface of the sealed container. A scroll compressor having a holding member fixed to the stator of the electric motor among the driving elements, and the sub-supporting element is integrally formed at a lower end portion of the holding member. Scroll compressor, characterized in that.