JPH09126167A - Hermetic type scroll compressor - Google Patents

Hermetic type scroll compressor

Info

Publication number
JPH09126167A
JPH09126167A JP28129895A JP28129895A JPH09126167A JP H09126167 A JPH09126167 A JP H09126167A JP 28129895 A JP28129895 A JP 28129895A JP 28129895 A JP28129895 A JP 28129895A JP H09126167 A JPH09126167 A JP H09126167A
Authority
JP
Japan
Prior art keywords
lap
scroll
wrap
orbiting scroll
winding end
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
Application number
JP28129895A
Other languages
Japanese (ja)
Inventor
Noriyuki Yamazaki
典幸 山▲崎▼
Shigekazu Nozawa
重和 野沢
Kazuo Sakurai
和夫 櫻井
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP28129895A priority Critical patent/JPH09126167A/en
Publication of JPH09126167A publication Critical patent/JPH09126167A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0246Details concerning the involute wraps or their base, e.g. geometry
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0246Details concerning the involute wraps or their base, e.g. geometry
    • F04C18/0269Details concerning the involute wraps

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

PROBLEM TO BE SOLVED: To stiffen a lap winding end portion low in lap stiffness in particular, which is located at a place where intake gas is enclosed by a turning scroll, by locally thickening the lap outer line outwardly in the radial direction at a place where the winding end portion of a turning scroll lap outer line is located. SOLUTION: A turning scroll 5 to be incorporated with a compression mechanism part has a lap winding end portion 5f thickened for example, in a range of 5h outwardly in the radial direction at a place out of a turning scroll lap outer line position 5g where intake gas is enclosed while being formed together with a stationary scroll inner line out of the two most hermetic chambers. Therefore, in a compression stroke by the turning scroll and the stationary scroll when intake gas is enclosed, strikes are reduced between the winding end portion of the turning scroll inner line and the winding end portion of the stationary scroll outer line, and an increase in input caused by lap striking and the degradation of reliability due to lap rupture caused by lap striking are thereby improved.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は密閉形スクロール圧
縮機に関する。
The present invention relates to a hermetic scroll compressor.

【0002】[0002]

【従来の技術】密閉型スクロール圧縮機については、例
えば特願平6−328409 号明細書に記載されている。旋回
スクロール,固定スクロール,電動機で駆動するクラン
ク軸である駆動軸,フレーム,自転防止機構から成る圧
縮機構部が、フレーム胴部外周面により容器の内壁に支
持されている。
2. Description of the Related Art A hermetic scroll compressor is described, for example, in Japanese Patent Application No. 6-328409. A compression mechanism portion including an orbiting scroll, a fixed scroll, a drive shaft that is a crank shaft driven by an electric motor, a frame, and a rotation prevention mechanism is supported on the inner wall of the container by the outer peripheral surface of the frame body portion.

【0003】固定スクロールに設けられる吸入口より吸
入された冷媒ガスは、まず旋回スクロールの内線巻き終
わり部と固定スクロール外線との密閉室と、これと対で
ある旋回スクロール外線と固定スクロール内線との密閉
室とに閉じ込められ、旋回スクロールの回転により徐々
にその密閉容積を減少させ、各ラップ間の容積減少によ
り圧縮され、固定スクロールのラップ中心部の吐出孔よ
り容器内部空間に吐出される。その後、ガスは密閉容器
の内壁に衝突する際に、ガスに含まれる潤滑油を分離
し、また電動機を冷却した後、容器外部へ吐出される。
The refrigerant gas sucked from the suction port provided in the fixed scroll first forms a closed chamber between the inner winding end of the orbiting scroll and the fixed scroll outer line, and a pair of the orbiting scroll outer line and fixed scroll inner line. Enclosed in a closed chamber, the orbiting scroll gradually reduces its closed volume by rotation, is compressed by the volume reduction between the wraps, and is discharged from the discharge hole at the center of the wrap of the fixed scroll into the internal space of the container. After that, when the gas collides with the inner wall of the closed container, the lubricating oil contained in the gas is separated, the electric motor is cooled, and then the gas is discharged to the outside of the container.

【0004】圧縮機構部の密閉室は、各ラップの内外線
側面が油膜をはさんで密閉し形成され、お互いに内外線
側面が接触することなく、旋回スクロールの回転に伴い
徐々にその密閉容積を減少させていくもので、ラップ間
の隙間が大きいと、圧縮ガスの漏れが大きく性能低下の
要因となり、またラップ内外線面凸である場合、ラップ
当たり運転によるラップ破損の原因となっている。
The closed chamber of the compression mechanism is formed such that the inner and outer wire side surfaces of each wrap are sealed with an oil film interposed therebetween, and the inner and outer wire side surfaces do not contact each other, and the sealed volume gradually increases as the orbiting scroll rotates. If the gap between the laps is large, the leakage of compressed gas will be a large factor and the performance will be reduced, and if the wrap inner and outer line surface is convex, it will be the cause of lap damage due to operation per lap. .

【0005】[0005]

【発明が解決しようとする課題】従来技術では、特に剛
性が低い旋回スクロール巻き終わり部では、ラップ内線
加工時、ラップのたおれが大きく、加工後(切削工具通
過後)の戻りにより内線凸となる傾向があった。これは
ラップ先端(ラップの高い方向)に向かうほど、またラ
ップ巻き終わりに向かうほど、内線凸となる傾向は大き
かった。
In the prior art, especially in the orbiting scroll winding end portion where the rigidity is low, the sag of the lap is great at the time of the lap inner line machining, and the inner line becomes convex by the return after the machining (after passing the cutting tool). There was a tendency. There was a greater tendency for the inner line to be convex toward the tip of the wrap (higher direction of the lap) and toward the end of the wrap.

【0006】本発明の目的は、ラップの剛性が特に低
い、旋回スクロールの吸入ガス閉じ込み位置であるラッ
プ巻き終わり部分の剛性を上げることにある。
An object of the present invention is to increase the rigidity of the wrap winding end portion, which is the position where the intake gas is closed in the orbiting scroll, where the rigidity of the wrap is particularly low.

【0007】また、旋回スクロールのたわみが特に大き
い場合にも、それに対する固定スクロール側を局部的に
逃がすことにより、ラップ側面の当たりをなくすことに
ある。
Further, even when the orbiting scroll has a particularly large deflection, the fixed scroll side is locally released to avoid the contact of the side surface of the wrap.

【0008】[0008]

【課題を解決するための手段】目的を達成するために、
本発明では加工時の剛性が特に低くなる、旋回スクロー
ルラップ外線の巻き終わり位置ラップ厚さを径方向外側
に向かって外線を局部的に太らせた。
[MEANS FOR SOLVING THE PROBLEMS] To achieve the object,
In the present invention, the winding end position of the orbiting scroll wrap outer wire, which has particularly low rigidity during processing, is locally thickened toward the outer side in the radial direction.

【0009】また、旋回スクロールの巻き終わり部内線
のたおれが特に大きい場合、吸入ガス閉じ込み位置であ
る、固定スクロール外線のラップ側面を、旋回スクロー
ル巻き終わり内線凸形状に応じて、径方向内側に向かっ
て凹形状とした。
Further, when the winding end portion extension of the orbiting scroll is particularly large, the wrap side surface of the fixed scroll outer line, which is the intake gas closing position, is moved radially inward in accordance with the orbiting scroll end-of-extension convex shape. The shape was concave toward the side.

【0010】旋回スクロールラップ外線の巻き終わり位
置において、ラップ厚さを径方向に部分的に太らせ、ラ
ップ加工剛性を高くすることで、ラップ側面加工時、被
加工部位のたおれを少なくし、加工後(切削工具通過
後)の戻りによる内線凸が改善される。
[0010] At the winding end position of the orbiting scroll wrap outer line, the wrap thickness is partially thickened in the radial direction to increase the lap processing rigidity, thereby reducing the sagging of the processed portion during the side surface processing of the wrap, The internal convexity due to the subsequent return (after passing the cutting tool) is improved.

【0011】改善が図られることで、旋回スクロール内
線凸によるラップ径方向の当たりが減少し、ラップ当た
りによる入力増加、及び信頼性低下の改善が図られる。
As a result of the improvement, the contact in the lap radial direction due to the convexity of the orbiting scroll inner lining is reduced, the input is increased due to the lap contact, and the reliability is reduced.

【0012】また、吸入ガス閉じ込み位置である、固定
スクロール外線ラップ側面を旋回スクロール巻き終わり
内線凸形状に応じて、径方向内側に向かって凹形状とし
たことで、旋回スクロールのラップ巻き終わり剛性改善
と同様、ラップ旋回内線凸によるラップ径方向の当たり
が減少し、ラップ当たりによる入力増加、及び信頼性低
下の改善が図られる。
Further, the fixed scroll outer line wrap side surface, which is the closed position of the intake gas, is concaved inward in the radial direction according to the convex shape of the orbiting scroll end of the orbiting scroll. Similar to the improvement, the contact in the lap radial direction due to the convexity of the lap turning is reduced, and the input increase due to the lap contact and the decrease in reliability are improved.

【0013】[0013]

【発明の実施の形態】以下、本発明の一実施例を図1及
び図2,図3により説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

【0014】図1は本発明の一実施例の密閉型スクロー
ル圧縮機の断面図を示す。
FIG. 1 is a sectional view of a hermetic scroll compressor according to an embodiment of the present invention.

【0015】図2,図3は本発明に係る圧縮機構部2の
旋回スクロール5のラップ形状を示す。
2 and 3 show the wrap shape of the orbiting scroll 5 of the compression mechanism section 2 according to the present invention.

【0016】図4,図5は旋回スクロール5ラップ巻き
終わり部加工時の、状態を説明する部分拡大図を示す。
4 and 5 are partially enlarged views for explaining the state at the time of processing the winding end portion of the orbiting scroll 5 wrap.

【0017】また、図6は他の実施例である圧縮機構部
2の固定スクロール6のラップ形状を示す。
FIG. 6 shows the wrap shape of the fixed scroll 6 of the compression mechanism 2 which is another embodiment.

【0018】図1において、密閉容器1内の左方には圧
縮機構部2を、右方にはこれを駆動する電動機3をそれ
ぞれ配置して収納し、密閉容器1下方は油溜り4が形成
されている。
In FIG. 1, a compression mechanism portion 2 is arranged on the left side of the closed container 1 and an electric motor 3 for driving the compression mechanism portion 2 is arranged on the right side of the closed container 1, and an oil sump 4 is formed below the closed container 1. Has been done.

【0019】圧縮機構部2は、旋回スクロール5,固定
スクロール6,電動機3で駆動するクランク軸である駆
動軸7,フレーム8,自転防止機構9から成っている。
The compression mechanism section 2 comprises an orbiting scroll 5, a fixed scroll 6, a drive shaft 7 which is a crank shaft driven by an electric motor 3, a frame 8 and a rotation preventing mechanism 9.

【0020】旋回スクロール5は台板5a上に渦巻状の
ラップ5bを有する。また、台板5aの背面には駆動軸
7のクランクピン部7aが挿入される軸受10が設けら
れ、また、台板5aには圧縮途中のラップ5b空間と背
圧室8aとを連通する均圧孔5cが設けられている。ま
た、台板5aの背面には自転防止機構であるオルダムリ
ング9のキー9aが摺動するキー溝5dが設けられてい
る。
The orbiting scroll 5 has a spiral wrap 5b on a base plate 5a. A bearing 10 into which the crank pin portion 7a of the drive shaft 7 is inserted is provided on the back surface of the base plate 5a, and the base plate 5a is provided with a uniform pressure for communicating the lap 5b space during compression and the back pressure chamber 8a. A pressure hole 5c is provided. Further, a key groove 5d on which the key 9a of the Oldham ring 9 as a rotation preventing mechanism slides is provided on the back surface of the base plate 5a.

【0021】固定スクロール6も同様に台板6a上に渦
巻状のラップ6bを有する。また、ラップ外周部には吸
入孔6c,ラップ中心部には吐出孔6dが設けられてい
る。密閉容器1に固定されたフレーム8は、駆動軸7を
支承する軸受11,背圧室8aと電動機3側の圧力差を
密封するためのシール軸受12,旋回スクロール5を固
定スクロール6との間で挾み込む台座8b,自転防止機
構であるオルダムリング9のキー9aが摺動するキー溝
8cを有する静止台座8d,旋回スクロール5に適切な
押し付け力を与えるための背圧室8a,電動機3,固定
子3aの締結部8eを有している。
The fixed scroll 6 also has a spiral wrap 6b on the base plate 6a. Further, a suction hole 6c is provided at the outer peripheral portion of the wrap, and a discharge hole 6d is provided at the central portion of the wrap. The frame 8 fixed to the closed container 1 includes a bearing 11 for supporting the drive shaft 7, a seal bearing 12 for sealing a pressure difference between the back pressure chamber 8a and the electric motor 3 side, and an orbiting scroll 5 between the fixed scroll 6. Pedestal 8b, a stationary pedestal 8d having a key groove 8c on which a key 9a of an Oldham ring 9 as a rotation preventing mechanism slides, a back pressure chamber 8a for giving an appropriate pressing force to the orbiting scroll 5, an electric motor 3 , And has a fastening portion 8e of the stator 3a.

【0022】尚、旋回スクロール5と固定スクロール6
との鏡板面(摺動面)5e,6eは背圧室8aと固定スク
ロール6の吸入孔6cに連通する低圧空間6fとのシー
ル面の役割を果たしている。
The orbiting scroll 5 and the fixed scroll 6
The end plate surfaces (sliding surfaces) 5e and 6e of the above-mentioned parts serve as sealing surfaces between the back pressure chamber 8a and the low-pressure space 6f communicating with the suction hole 6c of the fixed scroll 6.

【0023】また、フレーム8の胴部外周面8f、及び
足8g,8mが密閉容器1内面に沿って挿入され、中央
部に設けた足8mが密閉容器1内面に、中間嵌めもしく
は重なり嵌め状態で圧入され、また電動機3側に設けた
足8gの外周面は密閉容器1内面に重なり嵌め状態で圧
入により完全締結されている。
Further, the outer peripheral surface 8f of the frame 8 and the legs 8g, 8m are inserted along the inner surface of the closed container 1, and the leg 8m provided at the center portion is fitted in the inner face of the closed container 1 in an intermediate or overlapping state. Further, the outer peripheral surface of the foot 8g provided on the electric motor 3 side is overlapped with the inner surface of the closed container 1 and completely fastened by press fitting.

【0024】一方、圧縮機構部2側に設けたリング状胴
部外周面8fと密閉容器1の内壁とは、隙間が設けられ
ており、左部空間13と右部空間14は、隙間がある状
態で仕切られている。
On the other hand, a gap is provided between the outer peripheral surface 8f of the ring-shaped body portion provided on the side of the compression mechanism 2 and the inner wall of the closed container 1, and there is a gap between the left space 13 and the right space 14. It is divided by the state.

【0025】隙間については、左部空間13から外周面
8fと密閉容器1の内壁との隙間を通り、直接右部空間
14へ流れる量を制限し、固定スクロール6のラップ中
心部の吐出孔6dから左部空間13に吐出されたガスの
大部分が、フレーム外周面8fと密閉容器1の内壁で形
成された電動機3の左方に連通するガス通路15を通
り、電動機3左方に流れ、そして、電動機3を通過し電
動機3を冷却した後、電動機3右方に配置したカバー1
6に設けたガス通路孔16aを通り、右部空間14へ導
かれるよう、ガス通路15の流路抵抗に対して、隙間の
流路抵抗が大きくなるよう決められている。
With regard to the clearance, the amount of flow from the left space 13 to the right space 14 through the clearance between the outer peripheral surface 8f and the inner wall of the closed container 1 is restricted, and the discharge hole 6d at the center of the wrap of the fixed scroll 6 is restricted. Most of the gas discharged from the left space 13 flows to the left side of the electric motor 3 through the gas passage 15 communicating with the left side of the electric motor 3 formed by the frame outer peripheral surface 8f and the inner wall of the closed container 1, Then, after passing through the electric motor 3 to cool the electric motor 3, the cover 1 arranged on the right side of the electric motor 3
It is determined that the flow passage resistance of the gap is larger than the flow passage resistance of the gas passage 15 so as to be guided to the right space 14 through the gas passage hole 16a provided in 6.

【0026】尚、隙間は、密閉容器1のケーシング1a
とこれを左方から閉止するキャップ1bとの溶接締結に
おける密閉容器内径熱変形量についても考慮されてい
る。
The gap is defined by the casing 1a of the closed container 1.
And the amount of thermal deformation of the inner diameter of the closed container in the welding and fastening with the cap 1b that closes it from the left side is also taken into consideration.

【0027】旋回スクロール5と固定スクロール6は互
いにラップを内側に向けて組み合わせ、固定スクロール
6とフレーム8の台座8bとにより旋回スクロール5の
台板5aを挾み込む。旋回スクロール5の背面とフレー
ム8の間には旋回スクロール5の自転を防止するための
自転防止機構9が配置されている。
The orbiting scroll 5 and the fixed scroll 6 are combined with their wraps facing inward, and the base plate 5a of the orbiting scroll 5 is sandwiched by the fixed scroll 6 and the base 8b of the frame 8. A rotation prevention mechanism 9 for preventing rotation of the orbiting scroll 5 is arranged between the rear surface of the orbiting scroll 5 and the frame 8.

【0028】自転防止機構9であるオルダムリング9は
リング9bとキー9aで構成されており、旋回スクロー
ル5とフレーム8の静止台座8dとの間に挾まれ、オル
ダムリング9のキー9aは旋回スクロール5とフレーム
8の静止台座8dに設けられたキー溝5d及び8cに係
合している。
The Oldham ring 9 which is the rotation preventing mechanism 9 is composed of a ring 9b and a key 9a, and is sandwiched between the orbiting scroll 5 and the stationary base 8d of the frame 8, and the key 9a of the Oldham ring 9 is orbiting scroll. 5 and the keyways 5d and 8c provided on the stationary pedestal 8d of the frame 8.

【0029】駆動軸7は、一端が旋回スクロール5に設
けた軸受10に支持されているクランクピン部7aを有
し、もう一端はカバー16に設けた軸受17により支持
されている。また、駆動軸7内には、給油孔7bが該軸
の回転中心上に設けられ、この給油孔7bは一端がクラ
ンクピン部7aの端面に開口するとともに、もう一端は
カバー16に設けた軸受17の端面に開口している。ま
た、軸受12の給油のため、給油孔7bと連通する径方
向の給油孔7cを有している。
The drive shaft 7 has a crank pin portion 7a whose one end is supported by a bearing 10 provided on the orbiting scroll 5, and the other end is supported by a bearing 17 provided on a cover 16. Further, in the drive shaft 7, an oil supply hole 7b is provided on the center of rotation of the shaft, and one end of the oil supply hole 7b opens to the end face of the crank pin portion 7a and the other end is a bearing provided on the cover 16. It is open at the end face of 17. Further, for lubrication of the bearing 12, there is a radial oil supply hole 7c communicating with the oil supply hole 7b.

【0030】カバー16は、駆動軸7を支承する軸受1
7,油溜り4から潤滑油を導く給油パイプ18,フレー
ム8にボルト19により締結している。
The cover 16 is a bearing 1 for supporting the drive shaft 7.
7, the oil supply pipe 18 for guiding the lubricating oil from the oil sump 4, and the frame 8 are fastened with bolts 19.

【0031】電動機3は固定子3aと回転子3bから成
り、固定子3aはフレーム8の締結部8eに締結し、回
転子3bは駆動軸7に固定している。
The electric motor 3 comprises a stator 3a and a rotor 3b. The stator 3a is fastened to a fastening portion 8e of the frame 8 and the rotor 3b is fastened to the drive shaft 7.

【0032】密閉容器1は、フレーム8を支持するケー
シング1aと両側のキャップ1b,1cから成り、ケー
シング1aに吐出接続口20及び脚23を設け、キャッ
プ1bに吸入接続口21,キャップ1cに電源接続口2
2を設けている。
The closed container 1 comprises a casing 1a for supporting the frame 8 and caps 1b, 1c on both sides. The casing 1a is provided with a discharge connection port 20 and legs 23. The cap 1b has a suction connection port 21 and the cap 1c has a power source. Connection port 2
2 are provided.

【0033】次にスクロール圧縮機の作用について説明
する。電動機3により駆動軸7が回転すると、駆動軸
7,クランクピン部7aの回転運動及び自転防止機構9
の作用により、旋回スクロール5は自転することなく旋
回運動する。この結果、旋回スクロール5と固定スクロ
ール6のラップ5b,6b及び台板5a,6aで形成さ
れる空間は中心に移動しつつその容積を減少し、吸入接
続口21から吸入したガスを圧縮し、固定スクロール6
の吐出孔6dから吐出される。吐出された潤滑油を含ん
だ冷媒ガスは、密閉容器1のキャップ1bの内壁に衝突
する。さらに、フレーム外周面8fと密閉容器1の内壁
で形成されたガス通路15を通り電動機3左方になが
れ、そして、電動機3を通過し電動機3を冷却した後、
電動機3右方に配置したカバー16の内壁に衝突し、更
にガス通路孔16aを通り、密閉容器1のキャップ1c
の内壁に衝突する。密閉容器1及びカバー16の内壁に
衝突した潤滑油を含んだ冷媒ガスは、潤滑油とガスに分
離され、潤滑油は内壁に付着して、静かに圧縮機下方の
油溜り4に滴下する。左部空間13下方に滴下した潤滑
油は左部空間13と右部空間14との差圧により、フレ
ーム8に設けた、油戻し孔8kを通り、右部空間14下
部の油溜り4へ導かれる。
Next, the operation of the scroll compressor will be described. When the drive shaft 7 is rotated by the electric motor 3, the rotary motion of the drive shaft 7 and the crank pin portion 7a and the rotation prevention mechanism 9
By the action of, the orbiting scroll 5 makes an orbiting motion without rotating. As a result, the space formed by the orbiting scroll 5 and the wraps 5b, 6b of the fixed scroll 6 and the base plates 5a, 6a is reduced in volume while moving to the center, compressing the gas sucked from the suction connection port 21. Fixed scroll 6
Is discharged from the discharge hole 6d. The discharged refrigerant gas containing the lubricating oil collides with the inner wall of the cap 1b of the closed container 1. Further, after passing through the gas passage 15 formed by the frame outer peripheral surface 8f and the inner wall of the closed container 1 and flowing to the left of the electric motor 3, and passing through the electric motor 3 to cool the electric motor 3,
It collides with the inner wall of the cover 16 arranged on the right side of the electric motor 3, passes through the gas passage hole 16a, and passes through the cap 1c of the closed container 1.
Hit the inner wall of the. The refrigerant gas containing the lubricating oil that has collided with the inner wall of the closed container 1 and the cover 16 is separated into the lubricating oil and the gas, and the lubricating oil adheres to the inner wall and gently drops into the oil sump 4 below the compressor. The lubricating oil dropped below the left space 13 is guided to the oil sump 4 below the right space 14 through the oil return hole 8k provided in the frame 8 due to the pressure difference between the left space 13 and the right space 14. Get burned.

【0034】一方、ガスはケーシング1aに設けた吐出
接続口20から圧縮機の外へと導かれる。
On the other hand, the gas is guided to the outside of the compressor from the discharge connection port 20 provided in the casing 1a.

【0035】また、スクロールが圧縮作用を行うと旋回
スクロール5と固定スクロール6は離そうとする力が作
用するので、これを防止するため、旋回スクロール5の
背面の背圧室内8aの圧力は、均圧孔5cにより、吐出
圧力より低く、吸入圧力より高い中間圧力に保たれる。
この中間圧力のかけ方は特開昭53−119412号及び特開昭
55−37520 号公報で開示されているので詳細な説明は省
略する。また、前述の通り、密閉容器1内は吐出圧力で
ある。
Further, when the scroll performs a compression action, a force for separating the orbiting scroll 5 and the fixed scroll 6 acts. Therefore, in order to prevent this, the pressure in the back pressure chamber 8a on the back surface of the orbiting scroll 5 is The pressure equalizing hole 5c maintains an intermediate pressure lower than the discharge pressure and higher than the suction pressure.
How to apply this intermediate pressure is described in JP-A-53-119412 and
Since it is disclosed in Japanese Patent Publication No. 55-37520, detailed description will be omitted. Further, as described above, the pressure inside the closed container 1 is the discharge pressure.

【0036】旋回スクロール5の軸受10とフレーム8
の軸受11の背圧室8a側端面は中間圧力に保たれるた
め、油溜り4の潤滑油は、カバー16に設けた給油パイ
プ18を経て、駆動軸7のクランクピン部7a側の給油
孔7bの端部まで吐出圧力と中間圧力の差圧で導かれ、
旋回スクロール5に設けた軸受10に給油される。更
に、駆動軸7内の給油孔7cを介して、フレーム8内に
設けた軸受11,12をはじめ各摺動部に給油される。
なお、潤滑油の給油手段として、吐出圧力と中間圧力の
差圧給油として説明したが、この他の、給油手段、例え
ば、オイルポンプであってもよい。
Bearing 10 and frame 8 of orbiting scroll 5
Since the end surface of the bearing 11 on the back pressure chamber 8a side is maintained at an intermediate pressure, the lubricating oil in the oil sump 4 passes through the oil supply pipe 18 provided on the cover 16 and then the oil supply hole on the crank pin portion 7a side of the drive shaft 7. Guided to the end of 7b by the differential pressure between the discharge pressure and the intermediate pressure,
The bearing 10 provided on the orbiting scroll 5 is supplied with oil. Further, oil is supplied to each sliding portion including the bearings 11 and 12 provided in the frame 8 through the oil supply hole 7c in the drive shaft 7.
In addition, although the differential pressure oil supply between the discharge pressure and the intermediate pressure has been described as the oil supply means for the lubricating oil, other oil supply means, for example, an oil pump may be used.

【0037】本発明の実施例として、図2に旋回スクロ
ール5のラップ形状を示す。
As an embodiment of the present invention, FIG. 2 shows a wrap shape of the orbiting scroll 5.

【0038】また、旋回スクロール5ラップ巻き終わり
部加工時の、状態部形状を図4,図5の部分拡大図によ
り説明する。
The shape of the state portion at the time of processing the winding end portion of the orbiting scroll 5 wrap will be described with reference to the partially enlarged views of FIGS.

【0039】圧縮機構部2に組み込まれる旋回スクロー
ル5は、図2に示すようく、ラップ巻き終わり部分5f
が、二つの最大密閉室のうち、固定スクロール内線とで
形成する、吸入ガス閉じ込み位置である旋回スクロール
ラップ外線位置5gより外側の位置(例えば範囲5h)
で径方向外側に局部的に太らせている。
The orbiting scroll 5 incorporated in the compression mechanism portion 2 is, as shown in FIG. 2, a wrap winding end portion 5f.
Is a position outside the orbiting scroll wrap outer line position 5g, which is the intake gas closing position, formed by the fixed scroll inner line of the two largest closed chambers (for example, range 5h)
Is locally thickened radially outward.

【0040】ラップ巻き終わり部分を太らせ、ラップ剛
性を高くすることで、ラップ側面加工時エンドミル等の
切削工具の負荷(図3;矢印36)による、被加工部位で
あるラップの弾性変形(図3;2点鎖線38)が少なくな
り、加工後(切削工具通過後)の戻りによる、理想ラップ
形状(図4の二点鎖線39)に対する内線凸(図4の3
7)が改善される。
By thickening the wrap winding end portion and increasing the lap rigidity, the elastic deformation of the lap, which is the portion to be processed, due to the load (Fig. 3; arrow 36) of the cutting tool such as the end mill during the side surface processing of the lap (Fig. 3). 3; the two-dot chain line 38) is reduced, and the internal convexity (3 in FIG. 4) with respect to the ideal lap shape (two-dot chain line 39 in FIG. 4) due to the return after machining (after passing the cutting tool)
7) is improved.

【0041】特にラップ高さが高く、また巻き終わり部
ラップ厚さの薄い場合、その変形量は顕著となり、加工
精度悪化の要因となっている。
In particular, when the wrap height is high and the winding end portion wrap thickness is thin, the amount of deformation becomes remarkable, which is a cause of deterioration of processing accuracy.

【0042】改善が図られることで、旋回スクロール巻
き終わり内線凸によるラップ径方向の当たりが減少し、
ラップ当たりによる入力増加、さらにはラップ破損の信
頼性低下の改善が図られる。
As a result of the improvement, the contact in the wrap radial direction due to the convex end of the orbiting scroll winding end is reduced,
It is possible to improve the input increase due to lap and further reduce the reliability of lap breakage.

【0043】但し、図2に示す旋回スクロール巻き終わ
り部外線は、組み合わせる固定スクロール(図6)の吸
入室側面(6g)に当たってはならない。
However, the outer line of the orbiting scroll winding end portion shown in FIG. 2 should not hit the side surface (6g) of the suction chamber of the fixed scroll (FIG. 6) to be combined.

【0044】図2に示す旋回スクロール5のラップ形状
は、圧縮工程に必要なラップ外線側面5gから外側の位
置、主に範囲5hで、吸入ガス閉じ込み位置であるラッ
プ巻き終わり部分5fまで、滑らかに径方向外側に太ら
せるものであるが、図3に示すように、吸入ガス閉じ込
み位置であるラップ巻き終わり外線部を、リブ状の柱
(5h)により補強し、剛性を上げてもよい。
The wrap shape of the orbiting scroll 5 shown in FIG. 2 is smooth at a position outside the wrap outer line side surface 5g necessary for the compression process, mainly in the range 5h, to the wrap winding end portion 5f which is the intake gas closing position. As shown in FIG. 3, the wrap winding end outer wire portion, which is the intake gas closing position, may be reinforced by rib-shaped columns (5h) to increase the rigidity. .

【0045】他の実施例として、図6により説明する。Another embodiment will be described with reference to FIG.

【0046】圧縮機構部2が寸法上制約があり、旋回ス
クロールラップ外線の巻き終わり位置ラップ厚さを、必
要な剛性を得るまで、径方向外側に向かって局部的に太
らせることが出来ない場合、また加工設備能力上、必要
なラップ加工精度を確保することが出来ない場合には、
固定スクロール6において、吸入ガス閉じ込み位置であ
る、固定スクロール外線ラップ側面6hを、旋回スクロ
ール巻き終わり内線凸形状に応じて、径方向に向かって
凹形状とした。
In the case where the compression mechanism section 2 has a dimensional limitation, and the winding end position wrap thickness of the orbiting scroll wrap outer line cannot be locally thickened radially outward until the required rigidity is obtained. If the required lapping accuracy cannot be ensured due to the processing equipment capacity,
In the fixed scroll 6, the fixed scroll outer line wrap side surface 6h, which is the intake gas closing position, has a concave shape in the radial direction in accordance with the convex shape of the orbiting end of the orbiting scroll.

【0047】尚、固定スクロール外線ラップ側面6hの
削り量は、旋回スクロールのラップ巻き終わり内線凸形
状に応じ決めている。
The amount of scraping of the fixed scroll outer line wrap side surface 6h is determined according to the wrap winding end inner line convex shape of the orbiting scroll.

【0048】前記旋回スクロールのラップ巻き終わり剛
性改善と同様、旋回スクロールのラップ巻き終わり内線
凸によるラップ径方向の当たりが減少し、ラップ当たり
による入力増加、及び信頼性の改善が図られる。
Similar to the improvement of the wrap winding end rigidity of the orbiting scroll, the contact in the wrap radial direction due to the wrap winding end extension of the orbiting scroll is reduced, the input is increased by the lap contact, and the reliability is improved.

【0049】以上の実施例は、圧縮機構部と駆動部とを
水平に配置した、いわゆる横形スクロール圧縮機につい
て説明したが、圧縮機構部と駆動部を垂直に配置した、
いわゆる縦形スクロール圧縮機にも、本発明は適用可能
である。
In the above embodiment, the so-called horizontal scroll compressor in which the compression mechanism section and the drive section are arranged horizontally has been described, but the compression mechanism section and the drive section are arranged vertically.
The present invention is also applicable to so-called vertical scroll compressors.

【0050】[0050]

【発明の効果】本発明によれば、旋回スクロールと固定
スクロールとの圧縮工程において、吸入ガス閉じ込み時
点での、旋回スクロール内線巻き終わり部と、これに対
する固定スクロール外線巻き終わり部との当たりが減少
し、ラップ当たりによる入力の増加、またこれを原因と
するラップ破損の信頼性低下の改善が図られる。
According to the present invention, in the compression process of the orbiting scroll and the fixed scroll, the contact between the orbiting scroll inner line winding end portion and the fixed scroll outer line winding end portion when the intake gas is closed is determined. This reduces the number of inputs per lap and improves reliability of lap breakage due to this.

【0051】また、ラップ径方向の当たりが減少するこ
とで、圧縮時の振動や騒音を緩和する効果を有するもの
である。
Further, the reduction of the contact in the radial direction of the lap has the effect of alleviating vibration and noise during compression.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例に係る密閉型スクロール圧縮
機の断面図。
FIG. 1 is a sectional view of a hermetic scroll compressor according to an embodiment of the present invention.

【図2】本発明の圧縮機構部の旋回スクロールのラップ
形状を示す説明図。
FIG. 2 is an explanatory view showing a wrap shape of the orbiting scroll of the compression mechanism portion of the present invention.

【図3】他の実施例である圧縮機構部の旋回スクロール
のラップ形状を示す説明図。
FIG. 3 is an explanatory view showing a wrap shape of an orbiting scroll of a compression mechanism portion which is another embodiment.

【図4】ラップ巻き終わり部加工時の状態を説明する旋
回スクロールの部分説明図。
FIG. 4 is a partial explanatory view of an orbiting scroll for explaining a state at the time of processing a wrap winding end portion.

【図5】ラップ巻き終わり部加工時の状態を説明する旋
回スクロールの部分説明図。
FIG. 5 is a partial explanatory view of an orbiting scroll for explaining a state at the time of processing a wrap winding end portion.

【図6】他の実施例である圧縮機構部の固定スクロール
のラップ形状を示す説明図。
FIG. 6 is an explanatory view showing a wrap shape of a fixed scroll of a compression mechanism portion which is another embodiment.

【符号の説明】[Explanation of symbols]

5…旋回スクロール、5f…内線巻き終わり位置、5g
…外線吸入ガス閉じ込み位置、5h…外線範囲。
5 ... Orbiting scroll, 5f ... Extension winding end position, 5g
External air intake gas closed position, 5h ... External line range.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】固定スクロール,旋回スクロール,フレー
ム,自転防止機構他部材からなる圧縮機構部と、前記旋
回スクロールに連結するクランク軸とこれを駆動する電
動機,他部材からなるスクロール圧縮機において、 前記旋回スクロールのラップ外線の巻き終わり位置のラ
ップ厚さを径方向外側に向かって局部的に太らせたこと
を特徴とする密閉形スクロール圧縮機。
1. A scroll compressor including a fixed scroll, an orbiting scroll, a frame, a rotation preventing mechanism and other members, a crankshaft connected to the orbiting scroll, an electric motor for driving the crankshaft, and other members. A hermetic scroll compressor characterized in that the wrap thickness of the wrap outer line of an orbiting scroll is locally thickened toward the outside in the radial direction.
JP28129895A 1995-10-30 1995-10-30 Hermetic type scroll compressor Pending JPH09126167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28129895A JPH09126167A (en) 1995-10-30 1995-10-30 Hermetic type scroll compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28129895A JPH09126167A (en) 1995-10-30 1995-10-30 Hermetic type scroll compressor

Publications (1)

Publication Number Publication Date
JPH09126167A true JPH09126167A (en) 1997-05-13

Family

ID=17637127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28129895A Pending JPH09126167A (en) 1995-10-30 1995-10-30 Hermetic type scroll compressor

Country Status (1)

Country Link
JP (1) JPH09126167A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010248995A (en) * 2009-04-15 2010-11-04 Panasonic Corp Scroll compressor
WO2011090071A1 (en) * 2010-01-22 2011-07-28 ダイキン工業株式会社 Scroll compressor
JP2020041443A (en) * 2018-09-07 2020-03-19 有限会社スクロール技研 Scroll expander

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010248995A (en) * 2009-04-15 2010-11-04 Panasonic Corp Scroll compressor
WO2011090071A1 (en) * 2010-01-22 2011-07-28 ダイキン工業株式会社 Scroll compressor
JP2011169317A (en) * 2010-01-22 2011-09-01 Daikin Industries Ltd Scroll compressor
CN102713298A (en) * 2010-01-22 2012-10-03 大金工业株式会社 Scroll compressor
US9765781B2 (en) 2010-01-22 2017-09-19 Daikin Industries, Ltd. Scroll compressor
JP2020041443A (en) * 2018-09-07 2020-03-19 有限会社スクロール技研 Scroll expander

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