JPH09112421A - Hermetic motor compressor - Google Patents
Hermetic motor compressorInfo
- Publication number
- JPH09112421A JPH09112421A JP26672795A JP26672795A JPH09112421A JP H09112421 A JPH09112421 A JP H09112421A JP 26672795 A JP26672795 A JP 26672795A JP 26672795 A JP26672795 A JP 26672795A JP H09112421 A JPH09112421 A JP H09112421A
- Authority
- JP
- Japan
- Prior art keywords
- washer
- small
- rotor
- bearing
- thrust
- 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.)
- Pending
Links
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
- F04B39/02—Lubrication
- F04B39/0223—Lubrication characterised by the compressor type
- F04B39/023—Hermetic compressors
- F04B39/0238—Hermetic compressors with oil distribution channels
- F04B39/0246—Hermetic compressors with oil distribution channels in the rotating shaft
- F04B39/0253—Hermetic compressors with oil distribution channels in the rotating shaft using centrifugal force for transporting the oil
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、家庭用冷蔵庫、シ
ョーケース等の冷凍装置に関するもので、特に潤滑シス
テムに係るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating device such as a household refrigerator and a showcase, and more particularly to a lubricating system.
【０００２】[0002]
【従来の技術】従来、密閉型電動圧縮機の潤滑で特にク
ランク軸のスラスト軸受の構成に係るものとして、例え
ば特開昭６３−５１８６号公報に示されるようなタイプ
のコンプレッサにおいて図５に示すようにモータのロー
タａに固定されたクランク軸ｂは軸受ｃにより支承され
ている。そしてスラスト軸受部分ｄは、ロータａに形成
したワッシャー受部ｅとワッシャーｆと軸受ｃの端面の
スラスト面ｇにより構成されており、ワッハャーｆはク
ランク軸ｂの段部ｈとワッシャー受部ｅにより挟持固定
されている。しかしながら、軸受摺動ロスを低減するた
めに、軸径を小さくすることが行なわれている。かかる
場合、従来クランク軸に形成した段部ｈを形成するとロ
ータ固着部の径が変わるための兼用化が図れなくなる問
題がある。またワッシャー受部ｅの平面度が良好でない
と、ワッシャーｆが傾き、スラスト軸受の潤滑油が不均
一な大きな隙間から流出し、潤滑性がわるく、また片当
りにより摩耗量が増加する問題があった。2. Description of the Related Art Conventionally, a compressor of a type as disclosed in Japanese Patent Laid-Open No. 63-5186, for example, is shown in FIG. 5 for lubricating a hermetic electric compressor, particularly for the structure of a thrust bearing of a crankshaft. The crankshaft b fixed to the rotor a of the motor is supported by the bearing c. The thrust bearing portion d is composed of a washer receiving portion e formed on the rotor a, a washer f, and a thrust surface g at the end surface of the bearing c, and the washer f is formed by a step portion h of the crankshaft b and a washer receiving portion e. It is clamped and fixed. However, in order to reduce bearing sliding loss, the shaft diameter has been reduced. In such a case, if the step portion h formed in the conventional crankshaft is formed, the diameter of the rotor fixing portion changes, and there is a problem that it cannot be used in common. If the flatness of the washer receiving portion e is not good, there is a problem that the washer f tilts, the lubricating oil of the thrust bearing flows out from a large gap that is not uniform, the lubricity deteriorates, and the amount of wear increases due to one-sided contact. It was
【０００３】[0003]
【発明が解決しようとする課題】本発明は、クランク軸
にワッシャー支持用の段部を形成することなしに、ワッ
シャーをロータのワッシャー受面の平面度に影響される
ことなく、ワッシャーをスラスト面に良好に面接するこ
とにある。SUMMARY OF THE INVENTION According to the present invention, the washer is not affected by the flatness of the washer receiving surface of the rotor without forming a step portion for supporting the washer on the crankshaft, and the washer is thrust surface. To have a good interview.
【０００４】[0004]
【課題を解決するための手段】密閉ケース内の上部に電
動モータを、下方に圧縮要素を収納したもにあって、前
記電動モータにて回転するクランク軸とこれを支承する
軸受を有し、前記電動モータのロータにはクランク軸が
固着される軸孔とこの軸孔に連なるワッシャー受部を有
し、前記軸受端面のスラスト面より大径の外径を有する
大ワッシャーと、前記スラスト面より小径の外径を有す
る小ワッシャーとを備え、前記ワッシャー受部と前記ス
ラスト面間に、前記小フラッシャーが前記大ワッシャー
の上面に当接するように配置したものである。[MEANS FOR SOLVING THE PROBLEMS] An electric motor is housed in an upper part of a hermetically sealed case, and a compression element is housed in a lower part thereof. A rotor of the electric motor has a shaft hole to which a crank shaft is fixed and a washer receiving portion continuous with the shaft hole, and a large washer having an outer diameter larger than a thrust surface of the bearing end surface; A small washer having a small outer diameter is provided, and the small flasher is arranged between the washer receiving portion and the thrust surface so as to contact the upper surface of the large washer.
【０００５】[0005]
【発明の実施の形態】かかる構成によれば、小ワッシャ
ーがロータのワッシャー受面の傾きを吸収し、接触状態
の良化が図れ、摺動面の耐久性が向上し、またロータの
兼用化も達成できる。According to such a structure, the small washer absorbs the inclination of the washer receiving surface of the rotor, the contact state is improved, the durability of the sliding surface is improved, and the rotor is also used as a dual purpose. Can also be achieved.
【０００６】（実施の形態）以下本発明の実施の形態を
図示する図１〜図４を参照しながら詳細に説明する。(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.
【０００７】１は密閉型電動圧縮機で、密閉ケース２内
に、上方にモータ３を、下方に圧縮要素４を一体化した
圧縮ユニット５を弾性支持してある。Reference numeral 1 denotes a hermetic electric compressor in which a motor 3 is integrated upward and a compression unit 5 in which a compression element 4 is integrated downward is elastically supported in a sealed case 2.
【０００８】６はシリンダブロックで、７は吐出バル
ブ、吸入バルブ（図示せず）を配置したバルブプレー
ト、８はシリンダヘッドである。Reference numeral 6 is a cylinder block, 7 is a valve plate on which a discharge valve and a suction valve (not shown) are arranged, and 8 is a cylinder head.
【０００９】９はモータ３のステータ、１０はロータで
ある。１１はロータ１０の軸孔１０ｂに圧入、焼ばめ等
で固着したクランク軸で、シリンダブロック６に固定し
た軸受１２に枢支されている。１３は大端部をクランク
ピン部１４に、小端部をピストンピン１５に連結したコ
ネクチングロッド、１６はピストンである。Reference numeral 9 is a stator of the motor 3, and 10 is a rotor. Reference numeral 11 denotes a crankshaft fixed to the shaft hole 10b of the rotor 10 by press fitting, shrink fitting, etc., and is pivotally supported by a bearing 12 fixed to the cylinder block 6. Reference numeral 13 is a connecting rod whose large end is connected to the crank pin portion 14 and whose small end is connected to the piston pin 15, and 16 is a piston.
【００１０】クランク軸１１の軸支部分は下方に下ジャ
ーナル１７、上ジャーナル１８、その中間に肉抜き部１
９が形成してある。肉抜き部１９の深さは０．１〜１．
０ｍｍ程度で、これにより回転摺動抵抗を減じて機械損
失を低減している。The crankshaft 11 includes a lower journal 17, a lower journal 17, an upper journal 18, and a lightening portion 1 in the middle thereof.
9 is formed. The depth of the lightening portion 19 is 0.1 to 1.
It is about 0 mm, which reduces the rotary sliding resistance and reduces the mechanical loss.
【００１１】２０は、クランクピン部１４内部に形成さ
れ、クランク軸１１の回転中心１より偏倚して上方にの
びるオイル通路２１（図２）に、横孔にて連通し、下ジ
ャーナル１７表面に開口したオイル孔である。２２はオ
イル孔２０に下端が連通し、肉抜き部１９を含めて上ジ
ャーナル１８の上端よりわずかに上方までのびた一連の
溝である。Numeral 20 is formed inside the crank pin portion 14 and communicates with an oil passage 21 (FIG. 2) which is deviated from the rotation center 1 of the crank shaft 11 and extends upward by a lateral hole, and is connected to the surface of the lower journal 17. It is an open oil hole. Reference numeral 22 is a series of grooves whose lower end communicates with the oil hole 20 and extends slightly above the upper end of the upper journal 18 including the lightening portion 19.
【００１２】３２はこのオイル孔２０に上端が連通し、
溝２２と反対側に下方にのびる逃げ溝であり、平研削等
により形成されその深さは０．１〜０．２ｍｍ程度であ
る。The upper end of 32 communicates with the oil hole 20,
It is an escape groove that extends downward on the side opposite to the groove 22, and is formed by flat grinding or the like and has a depth of about 0.1 to 0.2 mm.
【００１３】前記溝２２の深さは肉抜き部の深さより深
いことが必要で、１．０〜２．０ｍｍ程度である。ま
た、２３は軸受１２の端面のスラスト面で（図４）、一
対の排出溝２４が形成してある。２５はスラスト面２３
と当接する大ワッシャーで、その外径はスラスト面２３
より若干大きく、またその上方にはスラスト面２３より
小径の小ワッシャー２５ａが配置され、その上面にロー
タ１０のワッシャー受部１０ａが当接する。The depth of the groove 22 must be deeper than the depth of the lightening portion, and is about 1.0 to 2.0 mm. Reference numeral 23 is a thrust surface of the end surface of the bearing 12 (FIG. 4), and a pair of discharge grooves 24 are formed. 25 is a thrust surface 23
A large washer that comes into contact with the outer diameter of the thrust surface 23
A small washer 25a, which is slightly larger than the thrust surface 23 and has a diameter smaller than that of the thrust surface 23, is arranged above the upper surface of which the washer receiving portion 10a of the rotor 10 abuts.
【００１４】一方、クランクピン部１４の下端には密閉
ケース２の下方のオイル溜り２６に下部を侵漬した給油
管２７がオイル通路２１と連通するように固着してあ
る。この給湯管２７は円筒状をなし、下端開口２８の中
心がクランク軸１１の回転中心１とほぼ一致するように
傾斜部２９を有している。On the other hand, at the lower end of the crankpin portion 14, an oil supply pipe 27 having a lower part immersed in an oil reservoir 26 below the closed case 2 is fixed so as to communicate with the oil passage 21. The hot water supply pipe 27 has a cylindrical shape and has an inclined portion 29 so that the center of the lower end opening 28 substantially coincides with the rotation center 1 of the crankshaft 11.
【００１５】さらに、下端開口２８の回転中心１側に、
上端が下端開口２８の反回転中心側３０より上方に伸し
た鉛直線ｍが交わる点ｎまでのびるスリット３１を形成
してある。このスリット３１の幅は１．５〜２．０ｍｍ
程度である。Further, on the rotation center 1 side of the lower end opening 28,
A slit 31 is formed whose upper end extends to a point n where a vertical line m extending upward from the counter rotation center side 30 of the lower end opening 28 intersects. The width of this slit 31 is 1.5 to 2.0 mm
It is about.
【００１６】次に、小ワッシャー２５ａの作用を図４に
て説明する。仮にロータ１０のワッシャー受部１０ａが
角度θだけ傾斜している場合、小ワッシャー２５ａの外
周部がワッシャー受部１０ａに接触しても、スラスト面
２３の外周より内側の荷重点で大ワッシャー２５を押圧
することとなり、大ワッシャー２５の傾斜を回避する。Next, the operation of the small washer 25a will be described with reference to FIG. If the washer receiving portion 10a of the rotor 10 is inclined by the angle θ, even if the outer peripheral portion of the small washer 25a comes into contact with the washer receiving portion 10a, the large washer 25 may be moved at the load point inside the outer periphery of the thrust surface 23. Since the pressure is applied, the inclination of the large washer 25 is avoided.
【００１７】[0017]
【発明の効果】本発明はかかる構成により、従来のクラ
ンク軸でスラスト用のワッシャーを支持固定するため
に、段部を形成する必要がないため、縮径による摺動ロ
スの低減をモータのロータの軸孔変更を伴なわずに行え
る。更にローターのワッシャー受部の平面度に裕度が出
るためその管理が容易で製造しやすく、更にまた、大ワ
ッシャーをスラスト面の面接が良好となるため、オイル
の隙間流れが均一で潤滑性がよく、片当り等も防止でき
耐久性を向上できるものである。According to the present invention, it is not necessary to form a step for supporting and fixing the thrust washer by the conventional crankshaft, so that the sliding loss due to the diameter reduction can be reduced. It can be done without changing the shaft hole. Furthermore, since the flatness of the washer receiving part of the rotor has a margin, the management is easy and it is easy to manufacture. Furthermore, since the large washer has good thrust surface contact, the oil gap flow is uniform and the lubricity is good. Well, it is possible to prevent one-sided contact and improve durability.
【図１】本発明の実施の形態を示す密閉型電動圧縮機の
断面図FIG. 1 is a sectional view of a hermetic electric compressor showing an embodiment of the present invention.
【図２】要部の詳細断面図FIG. 2 is a detailed cross-sectional view of a main part.
【図３】図２のIII−III′線における断面図3 is a sectional view taken along the line III-III ′ of FIG.
【図４】ワッシャー受面が傾斜している場合を示す図２
相当の断面図FIG. 4 is a view showing a case where the washer receiving surface is inclined.
Corresponding sectional view
【図５】従来例を示す断面図FIG. 5 is a sectional view showing a conventional example.
１ 密閉型電動圧縮機 ２ 密閉ケース ３ 電動モータ ４ 圧縮要素 １０ ロータ １０ａ ワッシャー受部 １０ｂ 軸孔 １１ クランク軸 １２ 軸受 ２３ スラスト面 ２５ 大ワッシャー ２５ａ 小ワッシャー DESCRIPTION OF SYMBOLS 1 Hermetic electric compressor 2 Hermetic case 3 Electric motor 4 Compression element 10 Rotor 10a Washer receiving portion 10b Shaft hole 11 Crankshaft 12 Bearing 23 Thrust surface 25 Large washer 25a Small washer
Claims (1)
方に圧縮要素を収納したものにあって、前記電動モータ
にて回転するフランク軸とこれを支承する軸受を有し、
前記電動モータのロータにはフランク軸が固着される軸
孔とこの軸孔に連なるワッシャー受部を有し、前記軸受
端面のスラスト面より大径の外径を有する大ワッシャー
と、前記スラスト面より小径の外径を有する小ワッシャ
ーとを備え、前記ワッシャー受部と前記トラスト面間
に、前記小ワッシャーが前記大ワッシャーの上面に当接
するように配置した密閉型電動圧縮機。1. An electric motor is housed in an upper part of a hermetically sealed case and a compression element is housed in a lower part thereof, and a flank shaft rotating by the electric motor and a bearing for supporting the flank shaft are provided.
The rotor of the electric motor has a shaft hole to which a flank shaft is fixed, and a washer receiving portion connected to the shaft hole, a large washer having an outer diameter larger than the thrust surface of the bearing end surface, and the thrust surface from the thrust surface. A hermetic electric compressor provided with a small washer having a small outer diameter, and arranged between the washer receiving portion and the trust surface so that the small washer abuts an upper surface of the large washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26672795A JPH09112421A (en) | 1995-10-16 | 1995-10-16 | Hermetic motor compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26672795A JPH09112421A (en) | 1995-10-16 | 1995-10-16 | Hermetic motor compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09112421A true JPH09112421A (en) | 1997-05-02 |
Family
ID=17434852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26672795A Pending JPH09112421A (en) | 1995-10-16 | 1995-10-16 | Hermetic motor compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09112421A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050614A (en) * | 2016-08-01 | 2016-10-26 | 珠海凌达压缩机有限公司 | Compressor |
-
1995
- 1995-10-16 JP JP26672795A patent/JPH09112421A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050614A (en) * | 2016-08-01 | 2016-10-26 | 珠海凌达压缩机有限公司 | Compressor |
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