JPH0742942B2 - Scroll type fluid machine - Google Patents
Scroll type fluid machineInfo
- Publication number
- JPH0742942B2 JPH0742942B2 JP62169374A JP16937487A JPH0742942B2 JP H0742942 B2 JPH0742942 B2 JP H0742942B2 JP 62169374 A JP62169374 A JP 62169374A JP 16937487 A JP16937487 A JP 16937487A JP H0742942 B2 JPH0742942 B2 JP H0742942B2
- Authority
- JP
- Japan
- Prior art keywords
- end plate
- press
- scroll
- fitting
- housing top
- 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 - Fee Related
Links
Landscapes
- Rotary Pumps (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は、円板状の鏡板と、該鏡板の下面から下方に突
設する渦巻体とをもつ固定スクロールと、前記鏡板の上
面と対向する天板と該天板の外周部から下向きに延びる
筒状部とをもつたハウジングトップとを備え、前記鏡板
の外周を前記ハウジングトップの筒状部内周に圧入し、
ハウジングトップの内側に吐出流体のチャンバーを形成
したスクロール形流体機械に関するものである。The present invention relates to a fixed scroll having a disk-shaped end plate and a spiral body projecting downward from a lower surface of the end plate, and an upper surface of the end plate opposed to the fixed scroll. A housing top having a top plate and a tubular portion extending downward from the outer peripheral portion of the top plate, the outer periphery of the end plate is press-fitted into the inner periphery of the tubular portion of the housing top,
The present invention relates to a scroll type fluid machine in which a chamber for discharge fluid is formed inside a housing top.
(従来の技術) 一般に、この種流体機械は、吸入管及び吐出管を接続す
る密閉ケーシング内の上部に、前記吐出管に連通する吐
出孔及び渦巻体と鏡板をもった固定スクロールと、この
固定スクロールの渦巻体に対抗する渦巻体をもった可動
スクロールとを架構を介して配置する一方、前記架構に
モータを支持し、このモータの駆動軸上端部に自転防止
機構を介して前記可動スクロールを連結し、この可動ス
クロールの公転駆動により前記吸入管から前記ケーシン
グ内に導入した流体を、前記各スクロールの渦巻体間に
導入して圧縮し、この圧縮流体を前記固定スクロールの
吐出孔から前記ケーシンズのハウジングトップのチャン
バーに吐出し、前記吐出管に供給する如く構成されてい
る。(Prior Art) Generally, in this type of fluid machine, a fixed scroll having a discharge hole and a spiral body and an end plate communicating with the discharge pipe is provided in an upper part of a closed casing connecting the suction pipe and the discharge pipe. A movable scroll having a spiral body that opposes the scroll body of the scroll is arranged through a frame, while a motor is supported by the frame, and the movable scroll is mounted on the upper end of the drive shaft of the motor through a rotation prevention mechanism. A fluid introduced into the casing from the suction pipe by the orbital drive of the movable scroll is connected between the scrolls of the scrolls to be compressed, and the compressed fluid is discharged from the discharge holes of the fixed scrolls to the casings. It is configured to discharge into the chamber at the top of the housing and supply to the discharge pipe.
そして、第3図に示すように、固定スクロール(A)
は、鏡板(B)の外周部上方部位の突設圧入部(b)
を、密閉ケーシング(C)におけるハウジングトップ
(D)の筒状部内周に圧入することにより、該ハウジン
グトップ(D)に取付け固定されるのが一般的である。Then, as shown in FIG. 3, the fixed scroll (A)
Is a protruding press-fitting portion (b) above the outer peripheral portion of the end plate (B).
Is generally fixed to the housing top (D) by press-fitting it into the inner circumference of the cylindrical portion of the housing top (D) in the closed casing (C).
(発明が解決しようとする問題点) ところが、このように鏡板(B)の外周部上方部位の突
設圧入部(b)を、前記ハウジングトップ(D)に圧入
すると、固定スクロール(A)の中心側が第3図に鎖線
で示すように、下向きに撓み変形してしまうのであり、
又、前記固定スクロール(A)の鏡板(B)の上面側に
は高圧の吐出流体で充たされたチャンバー(E)から下
方側への荷重が作用すること共相俟って、固定スクロー
ル(A)の中心側が下向きに撓み変形してしまう問題が
あった。(Problems to be Solved by the Invention) However, when the protruding press-fitting portion (b) in the upper portion of the outer peripheral portion of the end plate (B) is press-fitted into the housing top (D) as described above, the fixed scroll (A) As shown by the chain line in FIG. 3, the center side is flexed and deformed downward,
In addition, a downward load is applied from the chamber (E) filled with the high-pressure discharge fluid to the upper surface side of the end plate (B) of the fixed scroll (A), so that the fixed scroll ( There is a problem that the center side of A) is bent and deformed downward.
そして、上記のように、固定スクロール(A)の中心側
が下向きに撓み変形すると、該固定スクロール(A)の
渦巻体(G)下端面と可動スクロール(H)の鏡板
(I)との間に隙間が生じて圧縮性能が低下する問題も
起こるのであった。Then, as described above, when the center side of the fixed scroll (A) is bent and deformed downward, it is between the lower end surface of the scroll (G) of the fixed scroll (A) and the end plate (I) of the movable scroll (H). There was also a problem that a gap was generated and the compression performance deteriorated.
実際には、固定スクロール(A)の渦巻体(G)下端面
の可動スクロール(H)の鏡板(I)との間には、数+
μ〜100μ程度の隙間に関する許容限度があるが、前記
高圧吐出流体による圧力による撓み変形と、ハウジング
トップ(D)の圧入による撓み変形とが重合すると、上
記隙間の許容限度ギリギリとなって、他に工作精度のバ
ラツキが加重されることになるのであるから、上記許容
限度を容易に越えてしまい、撓みによる悪影響は無視で
きなくなるのである。Actually, a number of + is provided between the scroll body (G) of the fixed scroll (A) and the end plate (I) of the orbiting scroll (H).
Although there is a permissible limit for the gap of about μ to 100 μ, when the flexural deformation due to the pressure of the high-pressure discharge fluid and the flexural deformation due to the press-fitting of the housing top (D) are overlapped with each other, the permissible limit of the above-mentioned gap is almost reached. Since the variation of the working precision is added to the above, the allowable limit is easily exceeded, and the adverse effect due to the bending cannot be ignored.
本発明は、上記問題点に鑑みてなされたものであって、
固定スクロールの圧入による撓み変形をその中心側にお
いて上向きに撓み変形するようになして、この中心側に
おける上向きの撓み変形を固定スクロールとハウジング
トップ間のチャンバーにおける高圧吐出流体の下向き押
圧力による固定スクロールの中心側の下向きの撓み変形
と相殺させて、実際上には固定スクロールの撓み変形を
少なくできるスクロール形流体機械を提供することを主
な目的とするものである。The present invention has been made in view of the above problems,
The bending deformation of the fixed scroll due to press-fitting is bent upward on the center side of the fixed scroll, and the upward bending deformation of the center side is fixed by the downward pressing force of the high pressure discharge fluid in the chamber between the fixed scroll and the housing top. The main object of the present invention is to provide a scroll type fluid machine capable of offsetting the downward bending deformation on the center side of the scroll and actually reducing the bending deformation of the fixed scroll.
(問題点を解決するための手段) 本発明は、上記目的を達成するために、円板状の鏡板
(20)と、該鏡板(20)の下面から下方に突設する渦巻
体(23)とをもつ固定スクロール(2)と、前記鏡板
(20)の上面と対向する天板(1b)と該天板(1b)の外
周部から下向きに延びる筒状部(1c)とをもつたハウジ
ングトップ(1a)とを備え、前記鏡板(20)の外周を前
記ハウジングトップ(1a)の筒状部内周に圧入し、ハウ
ジングトップ(1a)の内側に吐出流体のチャンバー(1
3)を形成したスクロール形流体機械において、前記鏡
板(20)の下面と前記渦巻体(23)との結合部に対応す
る前記鏡板(20)の外周部位に、前記ハウジングトップ
(1a)の筒状部内周と圧接し、この筒状部(1c)への圧
入時、圧入による撓み変形が前記チャンバー(13)内に
おける吐出流体圧力による下向き押圧力に対抗する上向
方向となる圧入部(20a)を径方向外方側に突出状に形
成したものである。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a disk-shaped end plate (20) and a spiral body (23) protruding downward from the lower surface of the end plate (20). A housing having a fixed scroll (2) having a top plate (1b) facing the upper surface of the end plate (20), and a tubular part (1c) extending downward from the outer peripheral part of the top plate (1b). A top (1a), the outer periphery of the end plate (20) is press-fitted into the inner periphery of the tubular portion of the housing top (1a), and the discharge fluid chamber (1
In the scroll type fluid machine in which 3) is formed, the cylinder of the housing top (1a) is provided at the outer peripheral portion of the end plate (20) corresponding to the joint between the lower surface of the end plate (20) and the spiral body (23). The press-fitting part (20a) which is in pressure contact with the inner circumference of the cylindrical part (1a), and when press-fitted into this cylindrical part (1c), the bending deformation due to the press-fitting is in the upward direction against the downward pressing force due to the discharge fluid pressure in the chamber (13). ) Is formed so as to project radially outward.
(作用) しかして、上記のように、前記固定スクロール(2)の
鏡板(20)の下面と前記渦巻体(23)との結合部に対応
する前記鏡板(20)の外周部位に、前記ハウジングトッ
プ(1a)の筒状部内周と圧接し、この筒状部(1c)への
圧入時、圧入による撓み変形が前記チャンバー(13)内
における吐出流体圧力による下向き押圧力に対抗する上
向方向となる圧入部(20a)を径方向外方側に突出状に
形成したので、圧入時、前記固定スクロール(2)の鏡
板(20)が上向方向に撓み変形し、この上向方向への撓
み変形が、前記チャンバー(13)内における吐出流体圧
力による下向き押圧力での下向方向の撓み変形と相殺さ
れて、実際上は固定スクロール(2)の撓み変形が少な
くなるのである。(Operation) Then, as described above, the housing is provided at the outer peripheral portion of the end plate (20) corresponding to the joint between the lower surface of the end plate (20) of the fixed scroll (2) and the scroll (23). Upward direction in which the inner periphery of the top (1a) is in pressure contact, and when press-fitting into this tubular part (1c), the bending deformation due to press-fitting opposes the downward pressing force due to the discharge fluid pressure in the chamber (13). Since the press-fitting portion (20a) to be formed is formed so as to project outward in the radial direction, the end plate (20) of the fixed scroll (2) is bent and deformed in the upward direction during press-fitting, and The flexural deformation is offset by the downward flexural deformation due to the downward pressing force due to the discharge fluid pressure in the chamber (13), and the flexural deformation of the fixed scroll (2) is actually reduced.
(実施例) 以下、本発明にかゝるスクロール形流体機械を図面に示
す実施例について説明する。(Example) Hereinafter, an example shown in the drawings of a scroll type fluid machine according to the present invention will be described.
第1図に示すスクロール形流体機械は、ハウジングトッ
プ(1a)を備える密閉ケーシング(1)の内方上部に、
鏡板(20)に渦巻体(23)を突設した固定スクロール
(2)と、これに対応する渦巻体(31)をもつ可動スク
ロール(3)とを、上部部材(4a)及び下部部材(4b)
を備えた架構(4)を介して対向状に支持すると共に、
前記ケーシング(1)内の下部にモータ(5)を配置し
て、該モータ(5)の駆動軸(51)を、伝導機構(6)
並びに自転防止機構(7)を介して前記可動スクロール
(3)に連動させ、該可動スクロール(3)の公転駆動
により吸入管(11)により導入される低圧流体を、前記
モータ(5)のエアギャップ等を介して上昇せしめ、吸
入管(21)(21)を経て前記渦巻体(23)(31)間に導
いて、該各渦巻体(23)(31)間で圧縮した高圧流体を
吐出孔(22)から前記固定スクロール(2)と前記ハウ
ジングトップ(1a)間に形成されるチャンバー(13)に
吐出し、更に吐出管(12)を介して外部に吐出する如く
構成したものである。尚、前記ハウジングトップ(1a)
は、第1図に示すように前記鏡板(20)の上面と対向す
る天板(1b)と該天板(1b)の外周部から下向きに延び
る筒状部(1c)とをもち、前記鏡板(20)の外周を前記
ハウジングトップ(1a)の筒状部内周に圧入し、ハウジ
ングトップ(1a)の内側に前記チャンバー(13)を形成
している。The scroll type fluid machine shown in FIG. 1 has a closed casing (1) provided with a housing top (1a) at an inner upper part thereof.
An upper member (4a) and a lower member (4b) are provided with a fixed scroll (2) having a scroll (23) projecting from an end plate (20) and a movable scroll (3) having a corresponding scroll (31). )
While being supported oppositely through a frame (4) equipped with
The motor (5) is arranged in the lower part of the casing (1), and the drive shaft (51) of the motor (5) is connected to the transmission mechanism (6).
In addition, the low pressure fluid introduced by the suction pipe (11) by the revolution drive of the movable scroll (3) is interlocked with the movable scroll (3) through the rotation prevention mechanism (7), and is supplied to the air of the motor (5). The fluid is made to rise through a gap or the like, guided through the suction pipes (21) and (21) to the spiral bodies (23) and (31), and the high-pressure fluid compressed between the spiral bodies (23) and (31) is discharged. The gas is discharged from the hole (22) into the chamber (13) formed between the fixed scroll (2) and the housing top (1a), and further discharged to the outside through the discharge pipe (12). . The housing top (1a)
Has a top plate (1b) facing the upper surface of the end plate (20) and a cylindrical portion (1c) extending downward from the outer peripheral part of the top plate (1b) as shown in FIG. The outer circumference of the (20) is press-fitted into the inner circumference of the tubular portion of the housing top (1a) to form the chamber (13) inside the housing top (1a).
しかして、以上の構成において、第2図にも示すよう
に、前記鏡板(20)の下面と前記渦巻体(23)との結合
部に対応する前記鏡板(20)の外周部位に、前記ハウジ
ングトップ(1a)の筒状部内周と圧接し、この筒状部
(1c)への圧入時、圧入による撓み変形が前記チャンバ
ー(13)内における吐出流体圧力による下向き押圧力に
対抗する上向方向となる圧入部(20a)を径方向外方側
に突出状に形成したのである。実際上は、この圧入部
(20a)の前記鏡板(20)の外周部より外方へ突出する
寸法は約0.1mm程度である。In the above structure, as shown in FIG. 2, the housing is provided at the outer peripheral portion of the end plate (20) corresponding to the joint between the lower surface of the end plate (20) and the spiral body (23). Upward direction in which the inner periphery of the top (1a) is in pressure contact, and when press-fitting into this tubular part (1c), the bending deformation due to press-fitting opposes the downward pressing force due to the discharge fluid pressure in the chamber (13). The press-fitting portion (20a) is formed so as to project radially outward. Actually, the size of the press-fitting portion (20a) protruding outward from the outer peripheral portion of the end plate (20) is about 0.1 mm.
かくして、前記ハウジングトップ(1a)における筒状部
(1c)の固定スクロール(2)の外周部への圧入は、前
記鏡板(20)の外周部下方部位、即ち、前記鏡板(20)
の下面と前記渦巻体(23)との結合部に対応する前記鏡
板(20)の外周部位で行なわれ、この外周部下方部位か
ら径方向内方側に作用する圧入に基づく荷重力により、
鏡板(20)の中心側が、第2図中実線矢印で示すように
上向きへ若干撓み変形されることになるのであり、一
方、機械の稼働時には、前記チャンバー(13)内に吐出
される高圧の吐出流体による下向きの押圧力により、同
図中白抜き矢印で示すように、前記鏡板(20)の中心側
が下方に押されて下向きの撓み変形を生じるのであっ
て、結局、前記圧入時の上向きの撓み変形と高圧の吐出
流体による下向きの撓み変形とが相殺されて、前記固定
スクロール(2)の鏡板(20)の撓み変形を小さくでき
るのである。Thus, the cylindrical portion (1c) of the housing top (1a) is press-fitted into the outer peripheral portion of the fixed scroll (2) at a position below the outer peripheral portion of the end plate (20), that is, the end plate (20).
Is performed at the outer peripheral portion of the end plate (20) corresponding to the connecting portion between the lower surface of the and the spiral body (23), and by the load force based on the press-fitting that acts radially inward from the lower portion of the outer peripheral portion,
The center side of the end plate (20) is slightly bent and deformed upward as shown by the solid line arrow in FIG. 2, while the high pressure of the high pressure discharged into the chamber (13) when the machine is in operation. The downward pressing force of the discharge fluid causes the center side of the end plate (20) to be pressed downward to cause a downward bending deformation, as shown by the white arrow in the figure. The flexural deformation of the end plate (20) of the fixed scroll (2) can be reduced by canceling out the flexural deformation of the above and the downward flexural deformation due to the high-pressure discharge fluid.
(発明の効果) 本発明は、以上述べた如く、円板状の鏡板(20)と、該
鏡板(20)の下面から下方に突設する渦巻体(23)とを
もつ固定スクロール(2)と、前記鏡板(20)の上面と
対向する天板(1b)と該天板(1b)の外周部から下向き
に延びる筒状部(1c)とをもつたハウジングトップ(1
a)とを備え、前記鏡板(20)の外周を前記ハウジング
トップ(1a)の筒状部内周に圧入し、ハウジングトップ
(1a)の内側に吐出流体のチャンバー(13)を形成した
スクロール形流体機械において、前記鏡板(20)の下面
と前記渦巻体(23)との結合部に対応する前記鏡板(2
0)の外周部位に、前記ハウジングトップ(1a)の筒状
部内周と圧接し、この筒状部(1c)への圧入時、圧入に
よる撓み変形が前記チャンバー(13)内における吐出流
体圧力による下向き押圧力に対抗する上向方向となる圧
入部(20a)を径方向外方側に突出状に形成したもので
あるから、圧入時、前記固定スクロール(2)の鏡板
(20)が上向方向に撓み変形し、この上向方向への撓み
変形が、前記チャンバー(13)内における吐出流体圧力
による下向き押圧力での下向方向の撓み変形と相殺され
て、実際上は、固定スクロール(2)の撓み変形を少な
くできるのである。(Effect of the invention) As described above, the present invention has a fixed scroll (2) having a disk-shaped end plate (20) and a spiral body (23) protruding downward from the lower surface of the end plate (20). And a housing top (1) having a top plate (1b) facing the upper surface of the end plate (20) and a tubular portion (1c) extending downward from the outer peripheral portion of the top plate (1b).
a), a scroll-type fluid in which the outer periphery of the end plate (20) is press-fitted into the inner periphery of the cylindrical portion of the housing top (1a), and a chamber (13) for the discharge fluid is formed inside the housing top (1a). In the machine, the end plate (2) corresponding to the joint between the lower surface of the end plate (20) and the spiral body (23).
0) is pressed against the inner circumference of the cylindrical part of the housing top (1a), and when press-fitted into the cylindrical part (1c), the bending deformation due to the press-fitting is caused by the discharge fluid pressure in the chamber (13). Since the press-fitting portion (20a) that is in the upward direction to oppose the downward pressing force is formed to project outward in the radial direction, the end plate (20) of the fixed scroll (2) faces upward when press-fitting. The bending deformation in the upward direction is offset by the downward deformation due to the downward pressing force due to the discharge fluid pressure in the chamber (13), and in reality, the fixed scroll ( The flexural deformation of 2) can be reduced.
第1図は本発明にかゝるスクロール形流体機械の一実施
例の一部断面した正面図、第2図はその要部の説明図、
第3図は従来例の説明図である。 (1a)……ハウジングトップ (1b)……天板 (1c)……筒状部 (2)……固定スクロール (13)……チャンバー (20)……鏡板 (20a)……圧入部FIG. 1 is a partially sectional front view of an embodiment of a scroll type fluid machine according to the present invention, and FIG. 2 is an explanatory view of the main part thereof.
FIG. 3 is an explanatory diagram of a conventional example. (1a) …… Housing top (1b) …… Top plate (1c) …… Cylindrical part (2) …… Fixed scroll (13) …… Chamber (20) …… End plate (20a) …… Press fitting part
Claims (1)
面から下方に突設する渦巻体(23)とをもつ固定スクロ
ール(2)と、前記鏡板(20)の上面と対向する天板
(1b)と該天板(1b)の外周部から下向きに延びる筒状
部(1c)とをもつたハウジングトップ(1a)とを備え、
前記鏡板(20)の外周を前記ハウジングトップ(1a)の
筒状部内周に圧入し、ハウジングトップ(1a)の内側に
吐出流体のチャンバー(13)を形成したスクロール形流
体機械において、前記鏡板(20)の下面と前記渦巻体
(23)との結合部に対応する前記鏡板(20)の外周部位
に、前記ハウジングトップ(1a)の筒状部内周と圧接
し、この筒状部(1c)への圧入時、圧入による撓み変形
が前記チャンバー(13)内における吐出流体圧力による
下向き押圧力に対抗する上向方向となる圧入部(20a)
を径方向外方側に突出状に形成していることを特徴とす
るスクロール形流体機械。1. A fixed scroll (2) having a disk-shaped end plate (20) and a scroll (23) projecting downward from the lower surface of the end plate (20), and the upper surface of the end plate (20). And a housing top (1a) having a top plate (1b) opposed to the top plate (1b) and a tubular portion (1c) extending downward from an outer peripheral portion of the top plate (1b),
A scroll-type fluid machine in which the outer periphery of the end plate (20) is press-fitted into the inner periphery of the tubular portion of the housing top (1a) to form a chamber (13) for discharge fluid inside the housing top (1a). The outer peripheral portion of the end plate (20) corresponding to the joint between the lower surface of (20) and the spiral body (23) is in pressure contact with the inner peripheral portion of the cylindrical portion of the housing top (1a), and this cylindrical portion (1c) When press-fitting into the press-fitting part (20a), the bending deformation due to the press-fitting is in the upward direction against the downward pressing force due to the discharge fluid pressure in the chamber (13).
A scroll-type fluid machine characterized in that it is formed so as to project radially outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62169374A JPH0742942B2 (en) | 1987-07-06 | 1987-07-06 | Scroll type fluid machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62169374A JPH0742942B2 (en) | 1987-07-06 | 1987-07-06 | Scroll type fluid machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6412088A JPS6412088A (en) | 1989-01-17 |
| JPH0742942B2 true JPH0742942B2 (en) | 1995-05-15 |
Family
ID=15885407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62169374A Expired - Fee Related JPH0742942B2 (en) | 1987-07-06 | 1987-07-06 | Scroll type fluid machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0742942B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6461130B1 (en) * | 2000-09-08 | 2002-10-08 | Scroll Technologies | Scroll compressor with unique mounting of non-orbiting scroll |
-
1987
- 1987-07-06 JP JP62169374A patent/JPH0742942B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6412088A (en) | 1989-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |