JPH01125588A

JPH01125588A - Rotary compressor

Info

Publication number: JPH01125588A
Application number: JP28505587A
Authority: JP
Inventors: Makoto Iizuka; 誠飯塚
Original assignee: Tama Manufacturing Co Ltd
Current assignee: Tama Manufacturing Co Ltd
Priority date: 1987-11-11
Filing date: 1987-11-11
Publication date: 1989-05-18

Abstract

PURPOSE:To prevent the leak of refrigerant and improve the efficiency by bringing a rotor into face contact with the inner face of a housing and setting the secondary derivative of the distance from the rotary shaft of the rotor to the inner face of the housing to a specific value. CONSTITUTION:A rotor 2 is rotatably arranged in a housing 1. Vanes are slidably inserted into rotor slits 2a, and both tips are slid on the inner periphery of the housing 1. The secondary derivative of the distance (r) from the rotary shaft of the rotor 2 to the inner face of the housing 1 at the contact portion is set to 0, and the secondary derivative at the other portion is set to a sine wave curve. The contact property between the inner face of the housing and the rotor is thereby improved, the leak of a refrigerant is prevented, and the efficiency is improved.

Description

【発明の詳細な説明】産業上の利用分野本発明はベーンを有する回転圧縮機に関するもので、例
えば自動車用空調装置に於ける冷媒圧縮機として効率の
よい回転圧縮機を提供する。ものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rotary compressor having vanes, and provides an efficient rotary compressor as a refrigerant compressor in, for example, an automobile air conditioner. It is something.

従来技術従来より、ロータにベーンスリットを形成し、このベー
ンスリット内をベーンが貫通するよう１こ配設され、ロ
ータの回転に伴いベーンの先端ｈ（、リマソン曲面をな
す〕１ウジング内面と摺接するような圧縮機は知られて
いた（特開昭４９−１１２２１５公報）。Conventional technology Conventionally, a vane slit is formed in the rotor, and one vane is disposed to pass through the vane slit, and as the rotor rotates, the tip h of the vane (forming a Limason curved surface) slides against the inner surface of the housing. A compressor that is close to the other is known (Japanese Unexamined Patent Publication No. 112215/1983).

また従来のもののロータと７＼ウジングとのシール性能
を改善するためロータスリットに対するべ−ンの相対的
な摺動加速度ＹがＰ＝Ｃ，（ｃｏｓθ−ｃｏｓ　３θ） θ：回転角　但しθ−０は接触点ＣＩ：定数、を二時間となるように構成したものとして特公昭６１−２２１５
２号の発明が知られている。In addition, in order to improve the sealing performance between the conventional rotor and housing, the sliding acceleration Y of the vane relative to the rotor slit is P=C, (cos θ-cos 3θ) θ: rotation angle, where θ-0 is the contact point CI: constant, which is configured so that it is two hours.
Invention No. 2 is known.

発明が解決しようとする問題点従来の圧縮機では、ａ−夕とハウジングの接触が線接触
であるためシール性能に不満の残るものであった。Problems to be Solved by the Invention In conventional compressors, the contact between the a-tube and the housing is a line contact, resulting in unsatisfactory sealing performance.

本発明は上記の問題点を解決するため、ベーンに加えら
れる加速度を正弦波曲線または一定値とし、ベーンに加
えられる加速度に急激な変動を加えないよう調整しなが
らハウジング内面とロータとを面接触させてハウジング
内面とロータとの間の接触面でのシールをさらに良好な
ものにすることを目的とする。In order to solve the above problems, the present invention makes the acceleration applied to the vane a sinusoidal curve or a constant value, and brings the inner surface of the housing into surface contact with the rotor while adjusting the acceleration applied to the vane to avoid sudden fluctuations. The purpose of this invention is to further improve the sealing at the contact surface between the inner surface of the housing and the rotor.

問題点を解決するための手段上述の目的を達成するため、本発明ではハウジング内面
のうち、上記接触部分においてロータ回転軸からハウジ
ング内面までの距ｆｌｉｒの二次導関数ＰをＯに設定し
、それ以外の部分でのｆか正弦波曲線をなすような形状
の回転圧縮機を発明した。Means for Solving the Problems In order to achieve the above object, in the present invention, the second derivative P of the distance flir from the rotor rotation axis to the housing inner surface is set to O at the contact portion of the housing inner surface, He invented a rotary compressor whose shape forms a sine wave curve in other parts.

すなわち、Ｆ＝Ｏ（０≦θ＜Ｔ、π−Ｔ≦θ〈π＋Ｔ。That is, F=O(0≦θ<T, π−T≦θ<π+T.

２π−Ｔ≦θ≦２π）？＝Ｃ，［。。８π（θ−Ｔ））／（θ−Ｔ）−Ｆ］　
　　−ｒ４丁−）０ｓ（Ｔ≦θ≦π−Ｔ）Ｐ＝Ｃ，（ｃｏｓπ（θ−３Ｔ）−π（θ−３Ｔ））−
Ｔ］丁−−丁］了−− （π＋Ｔ≦θ≦２π−Ｔ）但し、Ｃ１：定数、θ：回転角Ｔ：定角　但し０くＴくπ／２となるような形状である。2π−T≦θ≦2π)? =C, [. . 8π(θ-T))/(θ-T)-F]
-r4-) 0s (T≦θ≦π-T) P=C, (cosπ(θ-3T)-π(θ-3T))-
T] Ding - Ding] End - (π+T≦θ≦2π−T) However, C1: Constant, θ: Rotation angle T: Constant angle However, the shape is such that 0 × T × π/2.

実施例以下本発明の一実施例を図に基づいて説明する。Example An embodiment of the present invention will be described below based on the drawings.

第１図中１は本発明の内面形状を有したハウジングでこ
のハウジング１内にはロータ２が回転自在に配設されて
いる。そして、ロータ２にはその中心を貫通するロータ
スリット２ａが設けられ、ベーン３がこのロータスリッ
ト２ａ内に摺動可能に挿入されている。又、ベーン３は
その両先端を前記ハウジングｌの内周面に摺接させてい
る。第２図に本発明に係るハウジングｌの内面形状を示
す。ここでＬはロータ回転軸からの最大内径、Ｓは最小
内径を表す。このハウジング１の内面形状はロータ回転
軸からの距離ｒの二次導関数ｆが次式の様になるように
決定しである。Reference numeral 1 in FIG. 1 denotes a housing having an inner surface according to the present invention, and a rotor 2 is rotatably disposed within the housing 1. As shown in FIG. The rotor 2 is provided with a rotor slit 2a passing through its center, and the vane 3 is slidably inserted into the rotor slit 2a. Further, both tips of the vane 3 are brought into sliding contact with the inner circumferential surface of the housing l. FIG. 2 shows the inner surface shape of the housing l according to the present invention. Here, L represents the maximum inner diameter from the rotor rotation axis, and S represents the minimum inner diameter. The inner surface shape of the housing 1 is determined so that the second derivative f of the distance r from the rotor axis of rotation is expressed by the following equation.

？＝０（０≦θ＜Ｔ、π−Ｔ≦θ〈π＋１′。? =0(0≦θ<T, π−T≦θ〈π+1′.

２π−Ｔ≦θ≦２π　）Ｐ＝Ｃ＋（ｃｏｓπ（θ−Ｔ））／（θ−Ｔ）−Ｔ−ゴ
ー　　　　−丁巧丁−）（Ｔ≦θくπ−Ｔ） π（θ−３Ｔ）３π（θ−３′ｒ）ｉ’　＝　ＣＩ（Ｃｏｇ−１１丁−〇〇Ｓ−，−）（π
＋Ｔ≦θく２π−Ｔ） θ：回転角　但しθ＝０はＡ点、Ｃ８；定数、Ｔ：正の定角次にこの式をθについて二階積分してハウジング１の内
面形状を決定する。2π-T≦θ≦2π) P=C+(cosπ(θ-T))/(θ-T)-T-Go-Ding-Kou-Ding-) (T≦θkuπ-T) π(θ-3T) 3π(θ-3'r) i' = CI(Cog-11-〇〇S-,-)(π
+T≦θ×2π−T) θ: rotation angle, where θ=0 is point A, C8: constant, T: positive constant angle. Next, this equation is second-order integrated with respect to θ to determine the inner surface shape of the housing 1.

ｒ−Ｃ１θ＋ｃｓｃｏ≦θ＜Ｔ）ｒ＝Ｃ＋（（π〜２Ｔ）１ｃｏ８π（θ−Ｔ）−π　　
　　　−Ｔ＝フＴ＝（π−２Ｔ）″　　３π（θ−Ｔ） −Ｔ已−ｃｏｓ　７丁丁−）＋Ｃ７θ＋Ｃ１（Ｔ≦θ〈
π−Ｔ　）、＝ｃ３．８（π−２Ｔ）！一ゴｒｒ−＋Ｃ１θ＋Ｃ３（π−Ｔ≦θくπ＋１゛）ｒ＝　　ＣＩ（（π−ａ　ＣｏＳπ（θ−３Ｔ）π　　
　　　　　−１−１丁−一− （π−２７）”　　　　３π（θ−３Ｔ）ｙ　ＣｏＳ、
　−）　＋　Ｃ１ｆｌ　＋　Ｃ３（π＋Ｔ≦０＜２π−
Ｔ）ｒ＝ｃ、θ十０３　　（２π−Ｔ≦θ≦２π　）ここで
０≦θ＜Ｔのときｒ＝Ｓ、π−Ｔ≦θ≦π＋Ｔのときｒ
＝Ｌだからｃ！＝０１ｃ３−Ｌ＋Ｓ−一］ロー・Ｌ−Ｓ　　　　　９π１Ｃ６−下−１１７，７っ−２となり、ハウジング内面形
状はｒ＝ｓ　　（０≦θ＜Ｔ）ｔ、＋ｓ　　　Ｌ−Ｓ　　９ｒ＝下−下・Ｔ（ｃｏｓ男書１３π（θ−３Ｔ）ＴＣＯ８ｙｒ−’ （Ｔ≦θ〈π−Ｔ）ｒ＝Ｌ　　（π−Ｔ≦θくπ＋Ｔ）ｔ、＋ｓ　　　Ｌ−９９ｒ＝　Ｔ−Ｔ’　■’”ｓもみ痺ひ一１３π（θ−３７）ＴａＯ２−Ｔ刀、−一】（π＋Ｔ≦θく２π−Ｔ）ｒ＝ｓ　　（２π−Ｔ≦θ≦２π　）で表され、二次導関数Ｙは？＝０（０≦θ＜Ｔ、π−Ｔ≦θ≦π十Ｔ。r-C1θ+csco≦θ<T) r=C+((π~2T)1co8π(θ-T)-π
−T=fuT= (π−2T)″ 3π(θ−T) −T−cos 7chocho−)+C7θ+C1(T≦θ〈
π-T ) , =c3.8(π-2T)! Igorr-+C1θ+C3 (π-T≦θ×π+1゛) r= CI((π-a CoSπ(θ-3T)π
-1-1-1- (π-27)” 3π(θ-3T)y CoS,
−) + C1fl + C3(π+T≦0<2π−
T) r=c, θ103 (2π-T≦θ≦2π) Here, when 0≦θ<T, r=S, and when π-T≦θ≦π+T, r
= L, so c! =01c3-L+S-1] Low L-S 9π1 C6-Bottom-117, 7-2, and the inner shape of the housing is r=s (0≦θ<T) t, +s L-S 9 r=Bottom- Lower T (cos man book 13π (θ-3T) TCO8yr-' (T≦θ〈π-T) r=L (π-T≦θkuπ+T) t, +s L-99 r= T-T' ■ '''s Massage numbness 13π (θ-37) TaO2-T sword, -1] (π+T≦θ×2π-T) r=s (2π-T≦θ≦2π) It is expressed as the second derivative What is Y?=0 (0≦θ<T, π−T≦θ≦π10T.

２π−Ｔ≦θ≦２π）（Ｔ≦θ〈π−Ｔ）（π＋Ｔ≦θ〈２π−Ｔ）で表される。尚Ｔは、設計上の理由でＴ〈π／２となる
。It is expressed as 2π-T≦θ≦2π) (T≦θ<π-T) (π+T≦θ<2π-T). Note that T is T<π/2 for design reasons.

接触角Ｔを大きくとっていくと局部的に内側に対して凸
の部分を生ずるが、これはロータを回転させた場合騒音
・摩擦の原因となりゃすい。そこで凸部の形成を避ける
ため、判別式りがＤ＝＝　２ｔ’＋ｒ　＃　？＋ｒ”＞
０よりＴの値がπ／６以下であることが好ましい。When the contact angle T is increased, a convex portion is locally formed inwardly, but this tends to cause noise and friction when the rotor is rotated. Therefore, in order to avoid the formation of convex portions, the discriminant formula is D==2t'+r #? ＋r”＞
It is preferable that the value of T is less than π/6 than 0.

ここでロータ上反対側にあるベーンの先端間の距離は常
に等距＃Ｌ＋Ｓであり、同時にロータとハウジングとは
０≦θ≦Ｔ及び２π−Ｔ≦θ≦２πの範囲で完全な面接
触をなす。Here, the distance between the tips of the vanes on opposite sides of the rotor is always equidistant #L+S, and at the same time, the rotor and housing have complete surface contact in the range of 0≦θ≦T and 2π-T≦θ≦2π. Eggplant.

これらの曲線を、例えばＴ＝π／３６の場合について表
すと第３図及び第４図のようになる。These curves are shown in FIGS. 3 and 4 when T=π/36, for example.

第５図は特公昭６１−２２１５２号の発明のハウジング
の内面形状を示したものであり、第６図は本発明に係る
圧縮機と上記発明の圧縮機とを同等の体格（ロータ半径
Ｒ＝２５”、、、Ｌ−Ｓ＝１６”す、Ｌ＋５＝ｕｊ”ｌ
）とした場合に於いて、Ｔをπ／１８に設定し、θ＝Ｏ
付近すなわちハウジング監内面とロータ２との接触点Ａ
点付近の形状を比較したものである。Fig. 5 shows the inner surface shape of the housing of the invention of Japanese Patent Publication No. 61-22152, and Fig. 6 shows the compressor according to the present invention and the compressor of the above invention with the same size (rotor radius R = 25", L-S=16", L+5=uj"l
), set T to π/18 and θ=O
Nearby, that is, the contact point A between the housing inspection surface and the rotor 2
This is a comparison of the shapes around the points.

また本発明ではベーン３の加速度が定数または正弦波曲
線で与えられ、騒音として問題になる高周波成分を持た
ないために低騒音の回転圧縮機を提供することができる
。Further, according to the present invention, the acceleration of the vane 3 is given by a constant or a sinusoidal curve, and there is no high frequency component that causes a noise problem, so that a rotary compressor with low noise can be provided.

発明の効果上記第５図から明らかなように、本発明の回転圧縮機で
はとくにθ＝Ｔの付近においてハウジング内面とロータ
との接触性が改善され、広い範囲で面シールが構成され
るため、高圧側から低圧側への冷媒の漏れを防ぎ効率の
高い回転圧縮機とすることができる。Effects of the Invention As is clear from FIG. 5 above, in the rotary compressor of the present invention, the contact between the inner surface of the housing and the rotor is improved particularly in the vicinity of θ=T, and a face seal is formed over a wide range. It is possible to prevent refrigerant from leaking from the high pressure side to the low pressure side, resulting in a highly efficient rotary compressor.

[Brief explanation of the drawing]

第１図は本発明圧縮機の一実施例を示す断面図、第２図
は第１図図示圧縮機のハウジング内面形状を示す説明図
、第３図は第２図図示ハウジングの動径変化を示す説明
図、第４図は第１図図示圧縮機のベーンの加速度を示す
説明図、第５図は従来発明の圧縮機のハウジングの動径
変化を示す説明図、第６図は第１図図示圧縮機のハウジ
ング形状と従来発明の圧縮機のハウジング形状とを対比
して示す説明図である。 ■・・・ハウジング、２・・・ロータ、３・・・ベーン特許出願人　　株式会社玉製作所代理人　弁理士　　　稲　木　次　２同　　上　押本券彦第１図第３図第４図第５図Fig. 1 is a sectional view showing an embodiment of the compressor of the present invention, Fig. 2 is an explanatory view showing the inner surface shape of the housing of the compressor shown in Fig. 1, and Fig. 3 is an explanatory view showing the radial change of the housing shown in Fig. 2. FIG. 4 is an explanatory diagram showing the acceleration of the vane of the compressor shown in FIG. 1. FIG. 5 is an explanatory diagram showing the radial change of the housing of the compressor of the conventional invention. FIG. 2 is an explanatory diagram showing a comparison between the housing shape of the illustrated compressor and the housing shape of a conventional compressor. ■... Housing, 2... Rotor, 3... Vane Patent applicant Tama Seisakusho Co., Ltd. Agent Patent attorney Tsugu Inagi 2 Same as above Norihiko Oshimoto Figure 1 Figure 3 Figure 4 Figure 5

Claims

[Claims]

(1) A cylindrical housing, a rotor disposed within the housing that rotates by receiving a driving force from the outside, and a rotor disposed slidably within a rotor slit provided in the diametrical direction of the rotor. a vane whose tip is always in contact with the inner surface of the housing, and the second derivative ■ of the distance r from the rotation axis of the rotor to the inner surface of the housing is ■=0 (0≦θ<T, π−T≦θ <π+T, 2π−T≦
θ≦2π) ■=C_1{cos(π(θ−T))/(π−2T)−
cos(3π(θ-T))/(π-2T)}(T≦θ<
π-T) ■=C_1{cos(π(θ-3T))/(π-2T)
−cos(3π(θ−3T))/(π−2T)}(π+
T≦θ<2π−T) where C_1: constant, θ: rotation angle T: constant angle, but 0<T<π/2.

(2) The rotary compressor according to claim 1, wherein the rotary compressor is configured such that the value of the constant angle T satisfies 0<T<π/6.