JP3155594B2 - Fully sealed electric compressor - Google Patents
Fully sealed electric compressorInfo
- Publication number
- JP3155594B2 JP3155594B2 JP00312992A JP312992A JP3155594B2 JP 3155594 B2 JP3155594 B2 JP 3155594B2 JP 00312992 A JP00312992 A JP 00312992A JP 312992 A JP312992 A JP 312992A JP 3155594 B2 JP3155594 B2 JP 3155594B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- support leg
- case
- sub
- spherical
- 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
Links
Landscapes
- Compressor (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、一般的に冷凍冷房機器
に使用される全密閉形電動圧縮機に係り、特に、摺動負
荷の集中を回避する二軸受構造の全密閉形電動圧縮機の
副軸受の部分に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetically sealed electric compressor generally used for refrigeration and cooling equipment, and more particularly to a hermetically sealed electric compressor having a two-bearing structure for avoiding concentration of sliding load. Related to the auxiliary bearing part.
【0002】[0002]
【従来の技術】従来の二軸受構造の全密閉形電動圧縮機
における副軸受の構造としては、例えば特開平1−17
0774号公報に記載されるように、鋳鉄或いは鍛造等
で成形された支持脚のボス穴に、内輪及び外輪間に球体
をころがり自在に嵌合した一般的なボール軸受を圧入し
た例がある。2. Description of the Related Art The structure of a sub-bearing in a conventional hermetic electric compressor having a two-bearing structure is disclosed in, for example,
As described in Japanese Patent No. 0774, there is an example in which a general ball bearing in which a sphere is freely fitted between an inner ring and an outer ring is press-fitted into a boss hole of a support leg formed by cast iron or forging.
【0003】[0003]
【発明が解決しようとする課題】しかし、このような従
来の全密閉形電動圧縮機の副軸受の取付構造では、次の
ような問題点があった。即ち、鋳鉄或いは鍛造素材は成
形精度が劣っており、このような成形精度が劣る鋳鉄或
いは鍛造素材を支持脚の構成素材として用いると、これ
らを機械加工するための設備や加工費が必要となって製
造原価の高騰を招くことになる。However, such a conventional mounting structure for a sub-bearing of an all-enclosed electric compressor has the following problems. That is, cast iron or forged material is inferior in molding accuracy, and when such cast iron or forged material having inferior molding accuracy is used as a constituent material of the support legs, equipment and processing costs for machining these are required. This leads to a rise in manufacturing costs.
【0004】また、組立時に精密な芯出しを必要とする
ケース内径と副軸受の中心の精度を確保するため、支持
脚の環状の外径とボール軸受を圧入するボス穴との同心
度の確保は無論のこと、ケースは剛性が劣って、電動機
の固定子を嵌合すると、変形してしまうが、この場合で
も、ケースと支持脚との組合せ精度を高めるために、さ
らにケースの内面も機械加工をすることが必要となる
等、組立も含めて製造原価上不利な点が多い。Further, in order to secure the inner diameter of the case and the accuracy of the center of the auxiliary bearing which require precise centering during assembly, the concentricity between the annular outer diameter of the support leg and the boss hole into which the ball bearing is pressed is ensured. Needless to say, the case is inferior in rigidity and deforms when the stator of the electric motor is fitted, but even in this case, the inner surface of the case is further machined to increase the accuracy of the combination of the case and the support legs. There are many disadvantages in terms of manufacturing costs, including assembling, such as the necessity of processing.
【0005】さらに、上記従来の全密閉形電動圧縮機で
は、副軸受としてボールの転がり軸受を用いているが、
このような全密閉形電動圧縮機が用いられる家庭用ルー
ムエアコンデッショナー等の製品では運転騒音がその品
質を決める重大な因子であり、ころがり軸受はボールの
ころがりによる叩き音の発生を回避することができず、
静音化を希望する顧客のクレームの対象となる。Further, in the above-described conventional hermetic electric compressor, a ball rolling bearing is used as an auxiliary bearing.
For products such as household room air conditioners that use such hermetic electric compressors, the operating noise is a crucial factor in determining the quality, and rolling bearings should avoid hitting caused by ball rolling. Not be able to
Become a customer complaint who wants to reduce noise.
【0006】本発明の目的は、かかる問題を解消し、副
軸受を容易にかつ高精度に芯出しすることができて、品
質が優れた全密閉形電動圧縮機を提供することにある。An object of the present invention is to solve such a problem, and
An object of the present invention is to provide a completely hermetic electric compressor that can easily and highly accurately center a bearing and is excellent in quality.
【0007】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、ケースとその両端部側に溶接された蓋体
とで形成される密閉容器内の電動機部と一方の該蓋体と
の間に設けられた回転軸の副軸受の支持脚が、該ケース
内面に接合する環状壁と一方の該蓋体に向き合って該環
状壁から該ケースの内径側に延長しかつ該回転軸を通す
穴を有する平面部とからなり、該平面部を該副軸受の支
持部として、該回転軸が取り付けられた該副軸受を、該
支持脚の該平面部での回転軸に対して芯出し調整された
位置で、該支持脚の該平面部に溶接固定されたものとす
る。To achieve the above object of the Invention The present invention includes a case the motor unit and one of the lid member in the closed container formed by the lid which is welded to the both ends the support legs of the sub-bearing of the rotational shaft is provided, the annular wall and extending life and death the rotating shaft one opposite the lid member from the annular wall on the inner diameter side of the case to be joined to the inner surface of the case between the Let through
Consists of a flat portion having a hole, a flat portion as a support sub bearing, the sub bearing said rotary shaft is mounted, said
It is assumed that the support leg is welded and fixed to the flat portion of the support leg at a position adjusted for centering with respect to the rotation axis in the flat portion.
【0008】また、本発明は、該副軸受を、該回転軸が
摺動自在に嵌合する内面と円滑な球面状の外面とを有す
る球面軸受と、該球面軸受の該外面と摺動自在に対向し
た球面状の内面を有し、かつ該内面の一部に環状の窪み
部を有する外リングと、該外リングの該窪み部に圧入さ
れて該外リングに固接し、該球面軸受の該外面と摺動自
在に対向した球面状の内面を有する内リングとで形成
し、該外リングと該内リングとによって該球面軸受を摺
動自在に内包するように構成する。Further, the present invention provides a spherical bearing having an inner surface on which the rotating shaft is slidably fitted and a smooth spherical outer surface, and a slidable outer surface of the spherical bearing. An outer ring having a spherical inner surface opposed to the outer ring and having an annular concave portion on a part of the inner surface; and an outer ring press-fitted into the concave portion of the outer ring to firmly contact the outer ring, and The outer surface and the inner ring having a spherical inner surface slidably opposed to each other are formed, and the spherical bearing is slidably included by the outer ring and the inner ring.
【0009】[0009]
【作用】副軸受は支持脚の電動機部とは反対側を向いた
平面部に溶接固定されるので、該副軸受の芯出しが容易
かつ高精度に行なうことができ、該副軸受が高い取り付
け精度で堅固に保持されることになる。 [Function] The auxiliary bearing faces away from the motor of the support leg.
Alignment of the auxiliary bearing is easy because it is fixed to the flat part by welding.
And high accuracy, and the secondary bearing has a high mounting
It will be firmly held with accurate accuracy.
【0010】球面軸受の内面が回転軸と摺動自在である
ばかりでなく、この球面軸受の外面が外リングや内リン
グと摺動自在であるから、回転軸に曲り変形であって
も、これを吸収し、円滑なすべり軸受け作用が実現す
る。[0010] Not only is the inner surface of the spherical bearing slidable with the rotating shaft, but also the outer surface of the spherical bearing is slidable with the outer ring and the inner ring. And a smooth sliding bearing action is realized.
【0011】[0011]
【実施例】以下、本発明の実施例を図面により説明す
る。図1は本発明による全密閉形電動圧縮機の一実施例
を示す縦断面図であって、1は圧縮機本体、1aは圧縮
室、2はフレーム、3は主軸受、4は回転軸、4aは主
軸部、4bは偏芯部、4cは副軸部、5は旋回スクロー
ル、5aはボス部、5bはラップ、6は固定スクロー
ル、6aはラップ、6bは吐出口、7は吸入管、8はオ
ルダムリング、9はボルト、10は電動機、10aは回
転子、10bは固定子、11は副軸受、11aは球面軸
受、11bは外リング、11cは内リング、12は副軸
受の支持脚、13は密閉容器、13aはケース、13b
は蓋チャンバ、13cは底チャンバ、14は潤滑油であ
る。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing one embodiment of a hermetic electric compressor according to the present invention, wherein 1 is a compressor body, 1a is a compression chamber, 2 is a frame, 3 is a main bearing, 4 is a rotary shaft, 4a is a main shaft portion, 4b is an eccentric portion, 4c is a sub shaft portion, 5 is a revolving scroll, 5a is a boss portion, 5b is a wrap, 6 is a fixed scroll, 6a is a wrap, 6b is a discharge port, 7 is a suction pipe, 8 is an Oldham ring, 9 is a bolt, 10 is a motor, 10a is a rotor, 10b is a stator, 11 is a sub-bearing, 11a is a spherical bearing, 11b is an outer ring, 11c is an inner ring, and 12 is a supporting leg of a sub-bearing. , 13 is a closed container, 13a is a case, 13b
Is a lid chamber, 13c is a bottom chamber, and 14 is lubricating oil.
【0012】同図において、密閉容器13は筒状のケー
ス13aの一方に蓋チャンバ13bが溶接され、他方に
底チャンバ13cが溶接されてなる。この密閉容器13
内に電動機10と圧縮機本体1とが回転軸4で連結され
て設けられている。この回転軸4は主軸部4aと偏心部
4bと副軸部4cとからなり、主軸部4aの中心部が電
動機10の回転子10aに圧入或いは焼嵌され、電動機
10の固定子10bはケース13aの内面に焼嵌などに
より接合されている。また、この回転軸4の主軸部4a
が、電動機10の上方に設けられたフレーム2と一体と
なった主軸受3により、摺動自在に支持され、この回転
軸4の副軸部4cが、電動機10の下方のケース13a
に圧入及び溶接された状態の副軸受支持脚12に溶接さ
れて取付けられた副軸受11により、摺動自在に支持さ
れている。In FIG. 1, a closed container 13 is formed by welding a lid chamber 13b to one side of a cylindrical case 13a and a bottom chamber 13c to the other side. This closed container 13
Inside, an electric motor 10 and a compressor main body 1 are connected by a rotating shaft 4 and provided. The rotary shaft 4 is composed of a main shaft 4a and the eccentric portion 4b and the auxiliary shaft portion 4c, the central portion of the main shaft 4a is pressed or Shohama the rotor 10a of the electric motor 10, a stator 10b of the motor 10 Case 13a Are joined by shrink fitting or the like. Also, the main shaft portion 4a of the rotary shaft 4
Is slidably supported by a main bearing 3 integrated with a frame 2 provided above the electric motor 10, and a sub shaft portion 4 c of the rotary shaft 4 is connected to a case 13 a below the electric motor 10.
Is slidably supported by a sub-bearing 11 welded and attached to a sub-bearing support leg 12 in a state of being press-fitted and welded.
【0013】副軸受11は、回転軸4の副軸部4cが摺
動自在に嵌合する円筒内径を有する球面軸受11aと、
この球面軸受11aの外球面と自在に摺動する内球面と
外径側に環状突起部とを有する外リング11bと、この
環状突起部の内径に圧入される外径部と内球面を有する
内リング11cとからなっている。The sub bearing 11 includes a spherical bearing 11a having a cylindrical inner diameter into which the sub shaft portion 4c of the rotating shaft 4 is slidably fitted.
An outer ring 11b having an inner spherical surface slidably with the outer spherical surface of the spherical bearing 11a and an annular projection on the outer diameter side, and an inner ring having an outer diameter portion and an inner spherical surface press-fitted into the inner diameter of the annular projection. And a ring 11c.
【0014】圧縮機本体1はフレーム2の上方に取付け
られており、主として、旋回スクロール5と固定スクロ
ール6とで構成されている。この旋回スクロール5の下
面中央部にボス部5aが形成されており、このボス部5
aに設けられたくぼみ部に回転軸4の上部の偏心部4b
が嵌入している。これにより、回転軸4の回転と共に旋
回スクロール5が偏心回転するが、フレーム2の上面に
設けられたオルダムリング8により、旋回スクロール5
は自転するのが阻止され、回転軸4の中心軸を中心とす
る円軌道上を移動する。但し、以下の説明では、旋回ス
クロール5のこの移動を公転という。固定スクロール6
はボルト9によってフレーム2に固定されている。The compressor body 1 is mounted above the frame 2 and mainly comprises a revolving scroll 5 and a fixed scroll 6. A boss 5a is formed in the center of the lower surface of the orbiting scroll 5, and the boss 5
a eccentric part 4b above the rotary shaft 4
Is inserted. As a result, the orbiting scroll 5 rotates eccentrically with the rotation of the rotating shaft 4, but the orbiting scroll 5 is provided by the Oldham ring 8 provided on the upper surface of the frame 2.
Is prevented from rotating and moves on a circular orbit about the central axis of the rotating shaft 4. However, in the following description, this movement of the orbiting scroll 5 is referred to as orbit. Fixed scroll 6
Are fixed to the frame 2 by bolts 9.
【0015】旋回スクロール5の上面にはラップ5bが
渦巻状に設けられ、旋回スクロール5の上部に配置され
た固定スクロール6の下面にも渦巻状のラップ6aが設
けられて、旋回スクロール5のラップ5bと固定スクロ
ール6のラップ6aとが互いに嵌入し合っている。ラッ
プ5b、6aの渦巻形状は異なっており、これらラップ
5b、6aの渦巻の中心の先端部同志とラップ5b、6
aの壁面同志が2点で接触している。これらラップ5
b、6aの壁面とそれらの先端部、これら壁面の接触点
とで圧縮室1aが形成される。旋回スクロール5が公転
すると、ラップ5b、6aの壁面のこれら接触点が渦巻
上の軌跡に沿って移動していき、ラップ5b、6aの先
端部の接触は変わらないため、圧縮室1aは狭くなって
いく。A spiral wrap 5b is provided on the upper surface of the orbiting scroll 5, and a spiral wrap 6a is also provided on the lower surface of the fixed scroll 6 disposed on the upper portion of the orbiting scroll 5. 5b and the wrap 6a of the fixed scroll 6 fit each other. The spiral shapes of the wraps 5b and 6a are different, and the tip ends of the spirals of the wraps 5b and 6a and the wraps 5b and 6a are different from each other.
The wall surfaces a contact each other at two points. These wraps 5
The compression chamber 1a is formed by the wall surfaces of b and 6a, their tip portions, and the contact points of these wall surfaces. When the orbiting scroll 5 revolves, these contact points on the wall surfaces of the wraps 5b and 6a move along the trajectory of the spiral, and the contact of the tips of the wraps 5b and 6a does not change, so that the compression chamber 1a becomes narrow. To go.
【0016】固定スクロール6の中心近傍には、吐出口
6bが設けられ、また、吸入管7は旋回スクロール5の
ラップ5bと固定スクロール6のラップ6aとで形成さ
れる圧縮室1aに通じている。A discharge port 6b is provided near the center of the fixed scroll 6, and a suction pipe 7 communicates with a compression chamber 1a formed by a wrap 5b of the orbiting scroll 5 and a wrap 6a of the fixed scroll 6. .
【0017】圧縮機本体1は以上のように構成されてお
り、この圧縮機本体1を底チャンバ13cが取付けられ
たケース13a内に挿入し、この圧縮機本体1の中心と
ケース13aの内径とを調心した後、フレーム2の外周
面とケース13aの内面との間を点溶接することによっ
て固定される。The compressor main body 1 is configured as described above. The compressor main body 1 is inserted into a case 13a to which a bottom chamber 13c is attached, and the center of the compressor main body 1 and the inner diameter of the case 13a are determined. After the centering, the outer peripheral surface of the frame 2 and the inner surface of the case 13a are fixed by spot welding.
【0018】電動機10によって回転軸4が回転する
と、上記のように、旋回スクロール5が公転し、この公
転毎に圧縮室1aの容積が順次狭くなっていく。このよ
うな動作において、冷凍サイクルの図示しない蒸発器か
らの冷媒ガスが吸入管7を通して圧縮室1aに供給さ
れ、次第に圧縮されて吐出口6bから密閉容器13内に
吐出される。しかる後、この冷媒ガスは図示しない吐出
パイプから冷凍サイクルの図示しない凝縮器に送られ
る。When the rotating shaft 4 is rotated by the electric motor 10, the orbiting scroll 5 revolves as described above, and the volume of the compression chamber 1a is gradually reduced at each revolution. In such an operation, refrigerant gas from an evaporator (not shown) of the refrigeration cycle is supplied to the compression chamber 1a through the suction pipe 7, is gradually compressed, and is discharged from the discharge port 6b into the closed container 13. Thereafter, the refrigerant gas is sent from a discharge pipe (not shown) to a condenser (not shown) of the refrigeration cycle.
【0019】一方、密閉容器13の底部には潤滑油14
が貯溜されており、回転軸4が回転すると、この潤滑油
14が回転軸4の中心軸に沿って設けられた給油穴の内
部を上昇し、主軸受3、副軸受11の内面や、回転軸4
の偏心部4bと旋回スクロール5のボス部5aとの間に
供給され、これによって密閉形電動圧縮機の円滑な運転
が行なわれる。On the other hand, the lubricating oil 14
When the rotating shaft 4 rotates, the lubricating oil 14 rises inside the lubrication holes provided along the central axis of the rotating shaft 4, and the inner surface of the main bearing 3, the sub bearing 11, Axis 4
Is supplied between the eccentric portion 4b and the boss portion 5a of the orbiting scroll 5, whereby a smooth operation of the hermetic electric compressor is performed.
【0020】この実施例の特徴をなす図1での副軸受1
1は、図2に示すように、回転軸4の副軸部4c(図
1)が摺動自在に嵌合する内面11a1と球面状の外面
11a2とを有する球面軸受11aと、この球面軸受1
1aの外面11a2 と自在に摺動する球面状の内面11
b1 とこの内面11b1 に環状に設けた窪み部11b2
を有する外リング11bと、この窪み部11b2 に圧入
されて球面軸受11aの外面11a2 と自在に摺動する
球面状の内面11c1 を有する内リング11cとからな
る。かかる副軸受11を組み立てる場合には、外リング
11bの内面11b1 に球面状の外面11a2 が当たる
ように球面軸受11aを外リング11b内に挿入し、し
かる後、外リング11bの窪み部11b2 に内リング1
1cを圧入する。これにより、副軸受11は図1に示す
ように構成されるが、この場合、球面軸受11aの外面
11a2 は外リング11bの内面11b1 ,内リング1
1cの内面11c1 と摺動自在であり、従って、夫々の
リング11b、11c内に球面軸受11aが摺動自在に
内包された状態となる。なお、これら球面軸受11aや
リング11b,11cは鋼板或いは鋼材からなり、塑性
加工或いは切削加工によって形成されている。The auxiliary bearing 1 in FIG. 1 which characterizes this embodiment.
1, as shown in FIG. 2, a spherical bearing 11a of the auxiliary shaft portion 4c of the rotary shaft 4 (FIG. 1) has an inner surface 11a 1 and the spherical outer surface 11a 2 which fits slidably, the spherical Bearing 1
Spherical inner surface 11 to slide freely with the outer surface 11a 2 of 1a
b 1 a recess 11b 2 provided annularly to the inner surface 11b 1
An outer ring 11b with a, and a inner ring 11c having a spherical inner surface 11c 1 to slide freely between the outer surface 11a 2 of the recessed portion 11b 2 on the indented by spherical bearing 11a. According to the case of assembling the sub-bearing 11, inserts a spherical bearing 11a as the outer surface 11a 2 spherical to the inner surface 11b 1 of the outer ring 11b strikes in the outer ring 11b, and thereafter, the recessed portion 11b of the outer ring 11b 2 inner rings 1
1c is press-fitted. Thus, the auxiliary bearing 11 is configured as shown in FIG. 1, in this case, the outer surface 11a 2 of the spherical bearing 11a inner surface 11b 1 of the outer ring 11b, an inner ring 1
1c is freely inside surface 11c 1 and sliding, thus, each of the ring 11b, a state in which the spherical bearing 11a is slidably contained within the 11c. The spherical bearing 11a and the rings 11b and 11c are made of a steel plate or a steel material, and are formed by plastic working or cutting.
【0021】次に、この実施例の特徴をなす図1での副
軸受11と支持脚12の組立について、図3によってさ
らに詳細に説明する。但し、同図において、12aは環
状壁、12bは外径側平面部、12cは内径側平面部、
12dは穴であり、図1に対応する部分には同一符号を
付けて重複する説明を省略する。Next, the assembling of the auxiliary bearing 11 and the support leg 12 in FIG. 1 which characterizes this embodiment will be described in more detail with reference to FIG. However, in the figure, 12a is an annular wall, 12b is an outer diameter side flat portion, 12c is an inner diameter side flat portion,
Reference numeral 12d denotes a hole, and a portion corresponding to FIG.
【0022】支持脚12は、ケース13a内に圧入され
て接合された環状壁12aと、この環状壁12aに連続
した外径側平面部12bと、この外径側平面部12bに
連続して窪み状となった内径側平面部12cとからな
り、この内径側平面部12cの中央部に回転軸4の副軸
部4cの外径よりも大きく、かつ副軸受11の外リング
11bの外径よりも小さい直径の穴12dが設けられ、
この穴12dに回転軸4の副軸部4cが通されている。
かかる支持脚12は鋼板からなり、高精度な鋼板の冷間
塑性加工で成形されたものであって、短時間の成形が可
能である。かかる支持脚12のケース13aの内面への
取付けは、支持脚12の環状壁12aをケース13aの
内面へ圧入し、しかる後、環状壁12aをケース13a
の内面へ溶接する。このように支持脚12にはケース1
3aの内面に大きな面積をもってる当接する環状壁12
aが設けられているため、支持脚12をケース13aに
圧入して安定して取り付けるのが容易であるし、また、
副軸受11の支持をケース13aの奥部で行なうのに対
し、ケース13aに溶接する部分をケース13aの手前
側とすることができ、溶接作業が容易となる。The support leg 12 has an annular wall 12a press-fitted into the case 13a and joined thereto, an outer-diameter side flat portion 12b continuous with the annular wall 12a, and a recess continuously formed in the outer-diameter side flat portion 12b. It consists inner diameter side flat portion 12c which becomes Jo, countershaft axis of rotation 4 in the central portion of the inner diameter side flat portion 12c
A hole 12d having a diameter larger than the outer diameter of the portion 4c and smaller than the outer diameter of the outer ring 11b of the auxiliary bearing 11 is provided.
The countershaft 4c of the rotary shaft 4 is passed through the hole 12d.
The support legs 12 are made of a steel plate, and are formed by cold plastic working of a high-precision steel plate, and can be formed in a short time. To attach the support leg 12 to the inner surface of the case 13a, press the annular wall 12a of the support leg 12 into the inner surface of the case 13a, and then attach the annular wall 12a to the case 13a.
Welded to the inner surface. Thus, the case 1 is
An annular wall 12 having a large area in contact with the inner surface of 3a
a, it is easy to press-fit the support leg 12 into the case 13a and attach it stably.
While the auxiliary bearing 11 is supported at the back of the case 13a, the portion to be welded to the case 13a can be located on the front side of the case 13a, which facilitates the welding operation.
【0023】図3に示す状態で上記のように組み立てら
れた副軸受11を回転軸4の副軸部4cに取り付け、支
持脚12の内径側平面部12c上に装着する。しかる
後、副軸受11の構成部材の芯出しと溶接を行なって副
軸受11を支持脚12に固定するのであるが、これを図
4によって説明する。但し、図4において、15は芯出
装置、16は溶接トーチ、17は副軸受仮固定治具であ
り、前出図面に対応する部分には同一符号を付けてい
る。The sub-bearing 11 assembled as described above in the state shown in FIG. 3 is mounted on the sub-shaft portion 4c of the rotating shaft 4 and mounted on the inner diameter side flat portion 12c of the support leg 12. Thereafter, the auxiliary bearing 11 is fixed to the support leg 12 by centering and welding the constituent members of the auxiliary bearing 11 .
4 will be described. However, in FIG. 4 , reference numeral 15 denotes a centering device, reference numeral 16 denotes a welding torch, reference numeral 17 denotes an auxiliary bearing temporary fixing jig, and portions corresponding to the above-mentioned drawings are denoted by the same reference numerals.
【0024】副軸受11を、その球面軸受11aの内面
11a1 (図2)が回転軸4の副軸部4cと摺動自在と
なるように、この副軸部4cに取り付けて支持脚12の
内径側平面部12cに設置した後、回転トルク測定機能
等を併用した芯出装置15を用い、回転軸4を低速回転
させて副軸部4cと副軸受11の球面軸受11aの内面
11a1 とのクリアランスを、副軸受11の位置を調整
しながら、最適となるようにして芯出しし、この芯出し
が終ると、副軸受仮固定治具17で副軸受11を支持脚
12の内径側平面部12cに押しつけて仮固定する。そ
して、複数の溶接トーチ16により、支持脚12と副軸
受11の重合点の複数個所を点溶接する。この際、溶接
はフィラーを用いない非消耗式電極を使用し、共付けす
ることによって比較的スパッタの少ない正常な溶接状態
が得られる。[0024] The sub-bearing 11, the inner surface of the spherical bearing 11a 11 a 1 as (2) is freely auxiliary shaft portion 4c and the sliding of the rotating shaft 4, the support legs 12 attached to the auxiliary shaft portion 4c
After being installed on the inner diameter side flat portion 12c, the rotating shaft 4 is rotated at a low speed by using the centering device 15 having a function of measuring rotational torque and the like, and the sub shaft portion 4c and the inner surface 11a1 of the spherical bearing 11a of the sub bearing 11 are rotated. The clearance is centered so as to be optimal while adjusting the position of the sub-bearing 11, and when the centering is completed, the sub-bearing 11 is fixed by the jig 17 for temporarily fixing the sub-bearing to the inner surface side portion of the support leg 12. 12c and temporarily fixed. Then, a plurality of welding torches 16 are spot-welded at a plurality of points where the support leg 12 and the sub-bearing 11 overlap. At this time, a non-consumable electrode that does not use a filler is used for welding, and a normal welding state with relatively little spatter can be obtained by joining together.
【0025】このようにして、副軸受11は支持脚12
に取りつけられるが、副軸受11が、図2で説明したよ
うに、球面軸受11aの内面11a1 に回転軸4の副軸
部4cが摺動可能である上、球面軸受11aの外面11
a2 が外リング11bの内面11b1 と内リング11c
の内面11c1 とに摺動自在であるから、回転軸4の真
直度が若干低く、これに曲り変形があったとしても、こ
れらの摺動部でこの曲り変形による回転軸4の偏心を吸
収することができる。従って、副軸受11は回転軸4の
副軸部4cに対して円滑なすべり軸受となり、これらの
間の摩擦を低減でき、摩擦音の発生を防止することがで
きる。In this way, the auxiliary bearing 11 is
Although attached to the sub bearing 11, as explained in FIG. 2, on the auxiliary shaft portion 4c of the rotary shaft 4 to the inner surface 11a 1 of the spherical bearing 11a is slidable, the outer surface 11 of the spherical bearing 11a
inner ring 11c a 2 is the inner surface 11b 1 of the outer ring 11b
Because it is slidable in the the inner surface 11c 1, low straightness of the rotary shaft 4 is slightly, even if deformed bending thereto, absorbing the eccentricity of the rotary shaft 4 by the bending deformation at these sliding portions can do. Therefore, the sub bearing 11 becomes a smooth sliding bearing with respect to the sub shaft portion 4c of the rotating shaft 4, and the friction between them can be reduced, and generation of friction noise can be prevented.
【0026】また、ケース13aは、コスト面から、鋼
板塑性加工によって生成されるから、精度が劣り、かか
るケース13a内に圧縮機本体1や電動機10、回転軸
4等を取りつけて支持脚12を溶接固定すると、圧縮機
本体1とケース13aとの同心度が出難く、ケース13
aのセンターと回転軸4のセンターとにずれが生ずる。
しかし、上記実施例では、支持脚12の内径側平面部1
2cに、ケース13aのセンターと回転軸4のセンター
にずれがあっても、回転軸4の副軸部4cが余裕をもっ
て嵌入する穴12dが設けられており、この穴12dを
通った副軸部4cに対して副軸受11が上記のように芯
出しされて支持脚12に溶接固定されるから、回転軸4
の円滑な軸受けが可能となる。In addition, the case 13a is formed by plastic working of a steel plate from the viewpoint of cost. Therefore, the accuracy is inferior. The compressor body 1, the electric motor 10, the rotating shaft 4 and the like are mounted in the case 13a to mount the support legs 12 thereon. When fixed by welding, the concentricity of the compressor main body 1 and the case 13a is hardly obtained, and the case 13
A shift occurs between the center of a and the center of the rotating shaft 4.
However, in the above embodiment, the inner surface side flat portion 1
2c is provided with a hole 12d into which the sub shaft portion 4c of the rotating shaft 4 is fitted with a margin even if the center of the case 13a and the center of the rotating shaft 4 are displaced, and the sub shaft portion passing through the hole 12d is provided. 4c, the auxiliary bearing 11 is centered as described above and fixed to the support leg 12 by welding.
Smooth bearing is possible.
【0027】[0027]
【発明の効果】以上説明したように、本発明によれば、
密閉容器内の電動機部と該密閉容器の蓋体との間に支持
脚を設け、該支持脚の該蓋体に向き合った平面部を副軸
受の支持部とし、該平面部に該副軸受を溶接固定するも
のであるから、該副軸受の芯出しを容易かつ精度良く行
なうことができ、ケースのセンターと回転軸のセンター
とにずれがあっても、該副軸受の取り付け精度が高い状
態で安定に保持されることになる。As described above, according to the present invention,
The support legs provided between the lid of the electric motor part and the sealed container in the closed container, the flat portion facing the lid member of the support leg and the supporting portion of the sub bearing, the sub-bearing flat portion Since the secondary bearing is fixed by welding, the auxiliary bearing can be easily and accurately centered.
Even if it shifted to bets, so that the mounting accuracy of the sub bearing is stably maintained in a high state.
【0028】また、副軸受は回転軸に対して芯出しされ
て支持脚に溶接固定されているので、ケース内への圧縮
機本体、支持脚等の取りつけという複雑な関連部品の組
合わせによってケースのセンターと回転軸のセンターと
にずれが生じても、副軸受は、回転軸に対し、円滑なす
べり軸受として作用し、副軸受からの騒音を防止するこ
とができる。Further, since the auxiliary bearing is centered with respect to the rotary shaft and fixed by welding to the supporting legs, the case is mounted by a combination of complicated related parts such as mounting of the compressor body, the supporting legs and the like in the case. Even if the center of the rotary shaft is displaced from the center of the rotary shaft, the auxiliary bearing acts as a smooth sliding bearing with respect to the rotary shaft, and can prevent noise from the auxiliary bearing.
【0029】さらに、副軸受は別体構造をなし、回転軸
との摺動ばかりでなく、副軸受内部にも摺動自在な部分
が設けられているから、回転軸に曲り変形や上記の芯出
しにわずかな誤差が残っても、夫々の摺動部でこれらを
吸収することができ、円滑なすべり軸受として騒音をな
くすことができる。Further, since the sub bearing has a separate structure and is provided with a slidable portion inside the sub bearing as well as sliding with the rotary shaft, the rotary shaft is bent and deformed or the above-mentioned core is not formed. Even if there is a slight error in the protrusion, these can be absorbed by the respective sliding portions, and noise can be eliminated as a smooth sliding bearing.
【図1】本発明による全密閉形電動圧縮機の一実施例を
示す縦断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of a hermetic electric compressor according to the present invention.
【図2】図1における副軸受の一具体例わ示す分解斜視
図である。FIG. 2 is an exploded perspective view showing a specific example of a sub bearing in FIG.
【図3】図1での副軸受とその支持脚の組立状態の一具
体例を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing a specific example of an assembled state of a sub bearing and its support leg in FIG. 1;
【図4】図3での副軸受の支持脚への取付け方法の一具
体例を示す縦断面図である。FIG. 4 is a longitudinal sectional view showing a specific example of a method of attaching a sub bearing to a support leg in FIG. 3;
1 圧縮機本体 3 主軸受 4 回転軸 4c 副軸部 5 旋回スクロール 6 固定スクロール 10 電動機 11 副軸受 11a 球面軸受 11b 外リング 11c 内リング 12 支持脚 12a 環状壁 12b 外径側平面部 12c 内径側平面部 12d 穴 13 密閉容器 13a ケース 15 芯出装置 16 溶接トーチ 17 仮固定治具 DESCRIPTION OF SYMBOLS 1 Compressor main body 3 Main bearing 4 Rotating shaft 4c Subshaft part 5 Orbiting scroll 6 Fixed scroll 10 Electric motor 11 Sub bearing 11a Spherical bearing 11b Outer ring 11c Inner ring 12 Support leg 12aAnnular wall 12b Outer diameter side flat part 12c Inner diameter side flat part 12d Hole 13 Sealed container 13a Case 15 Centering device 16 Welding torch 17 Temporary fixing jig
───────────────────────────────────────────────────── フロントページの続き (72)発明者 若泉 雅典 栃木県下都賀郡大平町大字富田800番地 株式会社 日立製作所 栃木工場内 (72)発明者 羽田 光明 茨城県土浦市神立町502番地 株式会社 日立製作所機械研究所内 (72)発明者 田口 啓二 茨城県土浦市神立町502番地 株式会社 日立製作所機械研究所内 (56)参考文献 特開 平3−217678(JP,A) 特開 平3−96678(JP,A) 特開 平3−996(JP,A) (58)調査した分野(Int.Cl.7,DB名) F04B 39/00 103 F04C 29/00 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masanori Wakaizumi 800, Tomita, Odaimachi, Ohira-machi, Shimotsuga-gun, Tochigi Hitachi, Ltd.Tochigi Plant (72) Inventor Mitsuaki Haneda 502, Kunitachicho, Tsuchiura-shi, Ibaraki Hitachi, Ltd. Inside the Machinery Research Laboratory (72) Inventor Keiji Taguchi 502, Kandachicho, Tsuchiura-shi, Ibaraki Pref. Machinery Research Laboratory, Hitachi, Ltd. (56) References JP-A-3-217678 (JP, A) JP-A-3-96678 (JP, A) JP-A-3-996 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) F04B 39/00 103 F04C 29/00
Claims (4)
蓋体を、他方の端部側に第2の蓋体を夫々溶接して形成
された密閉容器内に圧縮機構部及び電動機部が回転軸で
連結されて収納され、該第1の蓋体側の該圧縮機構部付
近に該回転軸の主軸受が配置され、該主軸受とで電動機
部を挟むように該第2の蓋体側に該回転軸の副軸受が配
置された二軸受構造の全密閉形電動圧縮機において、 該ケースの内面に接合する環状壁と、環状壁から該第2
の蓋体と向き合って該ケースの内径側に延長し、中心に
該回転軸を通す穴が設けられた平面部とを有する該副軸
受の支持脚を該密閉容器内の該電動機部と該第2の蓋体
との間に設け、 該支持脚は、該環状壁が該ケースに圧入されて溶接され
ることにより、該ケースの内面に固定され、かつ該支持
脚の該第2の蓋体と向き合った該平面部を該副軸受の支
持部とし、該回転軸が取り付けられた該副軸受が、該支持脚の該平
面部での該回転軸に対して芯出し調整された位置で、 該
支持脚の該平面部に溶接固定されてなることを特徴とす
る全密閉形電動圧縮機。1. A compression mechanism in a sealed container formed by welding a first lid to one end of a cylindrical case and a second lid to the other end. And a motor unit connected and accommodated by a rotating shaft, a main bearing of the rotating shaft is disposed near the compression mechanism unit on the first lid side, and the second bearing is arranged so as to sandwich the motor unit with the main bearing . A hermetic electric compressor having a two-bearing structure in which a sub-bearing of the rotary shaft is disposed on the side of the lid, wherein an annular wall joined to the inner surface of the case;
The support leg of the auxiliary bearing having a flat portion provided with a hole through which the rotary shaft is provided at the center and extending to the inner diameter side of the case so as to face the lid of The support leg is fixed to an inner surface of the case by press-fitting and welding the annular wall to the case, and the second lid of the support leg is provided . The flat portion facing the support leg is used as a support portion for the sub bearing, and the sub bearing to which the rotating shaft is attached
A hermetically sealed electric compressor, wherein the compressor is welded and fixed to the flat portion of the support leg at a position where the center of the rotary shaft is adjusted with respect to the rotation axis in the surface portion.
外面とを有する球面軸受と、 該球面軸受の該外面と摺動自在に対向した球面状の内面
を有し、かつ該内面の一部に環状の窪み部を有する外リ
ングと、 該外リングの該窪み部に圧入されて、該球面軸受の該外
面と摺動自在に対向した球面状の内面を有する内リング
とからなり、 該外リングと該内リングとによって該球面軸受を摺動自
在に内包するように構成したことを特徴とする全密閉形
電動圧縮機。2. The spherical bearing according to claim 1, wherein the auxiliary bearing comprises: a spherical bearing having an inner surface on which the rotating shaft is slidably fitted; and a smooth spherical outer surface. An outer ring having a spherical inner surface freely facing and having an annular recess in a part of the inner surface; and an outer ring press-fit into the recess of the outer ring to slide on the outer surface of the spherical bearing. A hermetically-sealed electric compressor, comprising: an inner ring having a spherical inner surface facing freely; said outer ring and said inner ring slidably enclosing said spherical bearing. .
ースの内面に、前記副軸受が前記支持脚の前記平面部に
夫々溶接によって固定されたものであることを特徴とす
る全密閉形電動圧縮機。3. The device according to claim 1, wherein the annular wall of the support leg is fixed to the inner surface of the case and the sub bearing is fixed to the flat portion of the support leg by adjusting the alignment of the auxiliary bearing. A completely hermetic electric compressor characterized by the following.
支持脚の前記平面部と前記副軸受とは、非消耗式の電極
を用いて複数の点付け溶接により、溶接されていること
を特徴とする全密閉形電動圧縮機。4. The method according to claim 3, wherein the case is welded to the annular wall of the support leg, and the flat portion of the support leg and the sub-bearing are spotted using a non-consumable electrode. An all-enclosed electric compressor characterized by being welded by welding.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00312992A JP3155594B2 (en) | 1992-01-10 | 1992-01-10 | Fully sealed electric compressor |
KR1019920016101A KR960015822B1 (en) | 1991-10-03 | 1992-09-04 | Closed type motor-driven compressor |
MYPI92001593A MY108088A (en) | 1991-10-03 | 1992-09-05 | A closed type motor-driven compressor |
US07/942,022 US5304045A (en) | 1991-10-03 | 1992-09-08 | Closed type motor-driven compressor, a scroll compressor and a scroll lap machining end mill |
KR1019960024834A KR970003258B1 (en) | 1991-10-03 | 1996-06-28 | A scroll lap machining end mill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00312992A JP3155594B2 (en) | 1992-01-10 | 1992-01-10 | Fully sealed electric compressor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05187376A JPH05187376A (en) | 1993-07-27 |
JP3155594B2 true JP3155594B2 (en) | 2001-04-09 |
Family
ID=11548751
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP00312992A Expired - Lifetime JP3155594B2 (en) | 1991-10-03 | 1992-01-10 | Fully sealed electric compressor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3155594B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5116795B2 (en) * | 2010-04-21 | 2013-01-09 | 三菱電機株式会社 | Fuel supply device |
-
1992
- 1992-01-10 JP JP00312992A patent/JP3155594B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH05187376A (en) | 1993-07-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2712777B2 (en) | Scroll compressor | |
KR960015822B1 (en) | Closed type motor-driven compressor | |
EP0479412B1 (en) | Oldham coupling for scroll compressor | |
KR870001396B1 (en) | Compressor | |
US5137437A (en) | Scroll compressor with improved bearing | |
JP2712914B2 (en) | Scroll compressor | |
JP3173253B2 (en) | Scroll compressor | |
KR20020069478A (en) | Method Of Aligning Scroll Compressor Components | |
KR20020087837A (en) | Scroll compressor having a clearance for the oldham coupling | |
JP3260518B2 (en) | Scroll compressor and assembly method thereof | |
US6261072B1 (en) | Scroll compressor | |
JPH0469405A (en) | Bearing structure and sealed type electric compressor using that bearing | |
JPH0735790B2 (en) | Scroll compressor | |
JP3550940B2 (en) | Fluid machinery | |
JP7439690B2 (en) | Compressor, compressor manufacturing method | |
JPH07293201A (en) | Scroll type machine | |
JP3155594B2 (en) | Fully sealed electric compressor | |
JP3438746B2 (en) | Scroll compressor | |
JP3055341B2 (en) | Scroll compressor | |
JP3951349B2 (en) | Scroll compressor | |
US5791885A (en) | Scroll compressor having positioning means for axially movable non-orbiting scroll | |
JP4415178B2 (en) | Scroll fluid machine and assembly method thereof | |
JPH05209591A (en) | Scroll compressor | |
JP3133112B2 (en) | Scroll type fluid machine | |
JPS63253189A (en) | Scroll compressor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080202 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090202 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100202 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100202 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110202 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120202 Year of fee payment: 11 |
|
EXPY | Cancellation because of completion of term |