JPH06323264A - Mounting method for fixed hollow body of noncontact rotary machine - Google Patents

Abstract

PURPOSE:To provide a method with which process can be simplified, machining can be facilitated, machining and installation can be made highly efficiently, and a clearance between the outer periphery of a rotor and a segment part can be reduced (reduction in leakage loss) when a fixed hollow body is installed. CONSTITUTION:When a fixed hollow body 3 is installed in a casing, first an antiseizure layer is formed on a fixed hollow body 3 at an area (usually a segment part 5) with which the outer peripheral surface of a mating rotor meshed with a rotor on the fixed hollow body 3 side is at least made in contact closely, and the fixed hollow body 3 is formed into the final dimensions. Next, the fixed hollow body 3 and positioning elements 15 and 14 provided in the casing are matched with each other, and the fixed hollow body 3 is fixed to the casing for correct positioning.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は一対のローターが互いに
非接触状態で同期的に噛み合い、ポンプや膨張機として
機能する非接触回転機械の固定中空体と取り付け方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed hollow body and a mounting method for a non-contact rotary machine which functions as a pump or an expander, in which a pair of rotors mesh with each other in a non-contact manner in a synchronous manner.

【０００２】[0002]

【従来の技術】本発明を理解する為、先ず前記非接触回
転機械について説明する。図１に示される各種非接触回
転機械において図１（イ）から図１（ヘ）までにおける
上段側のローターは、回転中心体６の外側に同心的に固
定された固定中空体３の外周面に密接しながら回転中心
体６と一体的に回転する羽根１を有し（図１（ニ）では
下段側のローターも同様の構成である）、下段側のロー
ターと互いに非接触状態で同期歯車によって同期的に互
いに反対方向へ回転し合う様になっている（代表として
図１（イ）の側面図を示す図１（ロ）をも参照のこ
と）。羽根１と一体構造になった羽根側板２に回転中心
体６を圧入などし、羽根１と回転中心体６とが一体的に
回転する様にしている。この場合、固定中空体３に欠円
部５を形成し、下段側のローターのローター外周面と面
状に密接させる事が望ましい。上段側のローターの線ｃ
は下段側のローターの線ｌの先端部（点又は小さな丸
み）により創成され、図１の各種非接触回転機械はポン
プ又は膨張機として機能するが、ポンプとしての作用を
逆とすれば（ローターは逆回転）膨張機として機能する
から、ポンプとしての場合を説明すると、通路９から作
動室８内に吸入された流体はローターの回転に従って圧
縮されながら開閉口７が連通口４へ連通すると各々を介
して回転中心体６内へ吐出される。但し，図１（ホ）で
は作動室８内の流体はリード弁１０，１０’を介して吐
出され、図１（ヘ）では作動室８は最大容積状態から吐
出側へ連通する様になっている。ローターを片持ち支持
構造とした実施例を図１（ト）に示す（この場合，ロー
ター軸は垂直方向を向く様にした）。オイルシールやガ
スシールが一方の側で不要となる為構造が簡素化する利
点がある。図１（チ）は羽根１と回転中心体６との結合
方法を示すもう１つの実施例で、羽根１の軸方向中間位
置で羽根１と回転中心体６とが直接一体・結合してお
り、この部分ではＸ−Ｘ’断面の如く羽根側面（線Ｃ，
Ｃ’）へ連結する円筒面１２が形成され、Ｙ−Ｙ’断面
とＺ−Ｚ’断面とは同一であり、挿入間隙１１には固定
中空体３が挿入される。Ｘ−Ｘ’断面，Ｚ−Ｚ’断面で
は下段側のローターのローター外周面は、各々円筒面１
２，固定中空体３に密接する事によって作動室８内の流
体をシールしている。さて以上の様な非接触回転機械で
は図２（イ）又は（ロ）の固定中空体３（前者は大略に
加工された欠円部５’を有する）を図２（ハ）の如くケ
ーシング（予め加工しておく）に圧入，焼き（冷し）ば
め等の方法により正しく取り付けて固定し、カッター１
３を用いて図１に示される欠円部５を正確に加工・形成
するのであるが、固定中空体３は強度・剛性上から鉄系
金属製である為に削りにくく、カッター１３からの逃げ
やびびりが発生して（特に図２（ロ）は起り易い）加工
に困難を来し、かつ前記びびりにより加工精度が落ち、
焼き付き防止の観点から図１の下段側のローターのロー
ター外周面と欠円部５の壁面との間隙を大き目となる様
に加工しざるを得ない為，漏洩損失が増大する欠点があ
った。この対策として欠円部５’（図２（ロ）では欠円
部５’に相当する部分）にテフロン等の焼き付き防止層
を形成しておけば加工し易く（軟質の故），前記欠点は
解消されるが、依然としてケーシングの加工（内周面，
底面の加工など）の後に固定中空体３を取り付けて固定
し，欠円部５’を加工しなければならない為、工程は煩
雑化し、能率が低くなる欠点はそのまま残る（特に心出
しが大変である。）。2. Description of the Related Art In order to understand the present invention, first, the non-contact rotary machine will be described. In the various non-contact rotary machines shown in FIG. 1, the rotor on the upper side in FIGS. 1 (a) to 1 (f) is the outer peripheral surface of the fixed hollow body 3 which is concentrically fixed to the outside of the rotation center body 6. Has a blade 1 that rotates integrally with the rotation center body 6 while closely contacting with the rotor (the rotor on the lower stage side has the same configuration in FIG. 1D), and the synchronous gear is in non-contact with the rotor on the lower stage side. Are synchronously rotated in mutually opposite directions (see also FIG. 1B, which is a side view of FIG. 1A as a representative). The rotation center body 6 is press-fitted into the blade side plate 2 integrated with the blade 1 so that the blade 1 and the rotation center body 6 rotate integrally. In this case, it is desirable that the fixed hollow body 3 be formed with a cutout portion 5 so as to come into close contact with the outer peripheral surface of the rotor on the lower stage side in a planar manner. Line c of the upper rotor
Is created by the tip (point or small roundness) of the line 1 of the rotor on the lower stage side, and the various non-contact rotary machines of FIG. 1 function as pumps or expanders, but if the action as a pump is reversed (rotor) Since it functions as an expander, the case of a pump will be described. When the fluid sucked into the working chamber 8 from the passage 9 is compressed according to the rotation of the rotor and the opening / closing port 7 communicates with the communication port 4, It is discharged into the rotation center body 6 via. However, in FIG. 1 (e), the fluid in the working chamber 8 is discharged through the reed valves 10 and 10 ′, and in FIG. 1 (f), the working chamber 8 communicates from the maximum volume state to the discharge side. There is. An example of a cantilevered support structure for the rotor is shown in Fig. 1 (g) (in this case, the rotor axis is oriented in the vertical direction). There is an advantage that the structure is simplified because the oil seal and the gas seal are not required on one side. FIG. 1C shows another embodiment showing a method of connecting the blade 1 and the rotation center body 6, in which the blade 1 and the rotation center body 6 are directly integrated and connected at an axial intermediate position of the blade 1. , In this portion, the blade side surface (line C,
A cylindrical surface 12 connecting to C ′) is formed, the YY ′ cross section and the ZZ ′ cross section are the same, and the fixed hollow body 3 is inserted into the insertion gap 11. In the XX ′ cross section and the ZZ ′ cross section, the outer peripheral surface of the rotor on the lower side is the cylindrical surface 1 respectively.
2. By closely contacting with the fixed hollow body 3, the fluid in the working chamber 8 is sealed. By the way, in the non-contact rotary machine as described above, the fixed hollow body 3 of FIG. 2 (a) or (b) (the former has a roughly cut-out circular portion 5 ') is casing (see FIG. 2 (c)). Cutter 1 is attached properly by a method such as press-fitting in (processed in advance), baking (cooling)
3 is used to accurately process and form the missing circle portion 5 shown in FIG. 1, but the fixed hollow body 3 is hard to cut because it is made of iron-based metal because of its strength and rigidity, and escapes from the cutter 13. Chattering occurs (especially in Figure 2 (b)), which makes machining difficult, and the chattering reduces machining accuracy.
From the viewpoint of preventing seizure, there is a drawback that the leakage loss increases because the gap between the outer peripheral surface of the rotor on the lower side of FIG. 1 and the wall surface of the missing circle portion 5 must be processed to be large. As a countermeasure against this, if a seizure prevention layer such as Teflon is formed on the cutout portion 5 '(the portion corresponding to the cutout portion 5'in FIG. 2B), it is easy to process (because it is soft), and the above-mentioned drawback Although resolved, casing processing (inner surface,
Since the fixed hollow body 3 must be attached and fixed after processing the bottom surface, etc., and the lacked circular portion 5'should be processed, the process becomes complicated, and the drawback of low efficiency remains as it is (especially when centering is difficult. is there.).

【０００３】[0003]

【発明が解決しようとする問題点】本発明の目的は固定
中空体３を取り付けるに当り，工程が簡素化され、加工
もし易く、かつ能率良く加工・取り付けが可能であり、
ローター外周面と欠円部５との間隙を縮小化（漏洩の減
少）する事のできる方法を提供する事にある。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The object of the present invention is to install the fixed hollow body 3 by simplifying the process, facilitating processing, and efficiently processing and mounting.
It is an object of the present invention to provide a method capable of reducing the gap between the outer peripheral surface of the rotor and the missing circle portion 5 (reducing leakage).

【０００４】[0004]

【問題点を解決する為の手段】本発明は従来の欠点を解
決する為、固定中空体をケーシングに取り付けるに当
り、固定中空体の少なくとも固定中空体側のローターの
噛み合い相手のローターのローター外周面が密接する部
分に焼き付き防止層が形成された固定中空体を最終寸法
に形成しておき、次に固定中空体，ケーシングに各々備
えられた位置決め用要素を互いに合わせて固定中空体を
ケーシングに固定し、かくして正しい位置に固定する様
にしたのである。SUMMARY OF THE INVENTION In order to solve the conventional drawbacks of the present invention, when mounting a fixed hollow body to a casing, at least the rotor of the fixed hollow body is engaged with the rotor of the fixed hollow body. The fixed hollow body with the seizure prevention layer is formed in the final size to the final size, and then the fixed hollow body and the positioning element provided on the casing are aligned with each other to fix the fixed hollow body to the casing. So I decided to fix it in the correct position.

【０００５】[0005]

【実施例】図１（イ）に本発明を実施したもので説明す
ると、本発明では先ず図３（イ）の如く固定中空体３の
少なくとも固定中空体３側のローターの噛み合い相手の
ローターのローター外周面が密接する部分（通常は欠円
部５）に接触しても焼き付かない焼き付き防止層を形成
しておき（例えばテフロンを０．２ｍｍ厚位コーティン
グする）、かつ欠円部５をも含めて固定中空体３を最終
寸法に加工しておくのである。この場合，前記焼き付き
防止層は固定中空体３の全面に形成しておく事が望まし
い（但し、固定中空体３をケーシングに固定する部分Ａ
は除く）。１４は次に述べる如く位置決め用要素であ
り、ここでは溝であるが、図３（ロ）の如く穴でもよ
い。そして，ケーシングの固定中空体３を嵌め込む（取
り付ける）部分Ｃは図３（ハ）の如く位置決め用要素１
５（図ではピン）を備えておく（ケーシング各部はもち
ろん最終寸法に加工しておく）。次に，ケーシングを加
熱するか又は固定中空体３を冷却するかして両者を焼き
（冷し）ばめの様な収縮締結するのであるが（締結時
は，すきまばめとなる）、各々に備えられた位置決め用
要素１５，１４を互いに合わせて嵌め合わせ（ピンと溝
とを合わせて嵌め合わせる）、暫くすれば両者間の温度
差がなくなるから、図３（ニ）の如く固定中空体３はケ
ーシングに位置決め用要素１４，１５の作用により正し
い位置にしっかりと固定される様になる（この後の欠円
部５の加工はもちろん不要である）。図３（ホ），
（ヘ）は位置決め用要素のもう１つの実施例で、位置決
め用要素１４”は軸方向に形成された溝，位置決め用要
素１５’は半径方向に備えられたピンである。この他，
固定中空体３とケーシングとをキーで位置決めして固定
する方法も考えられる。尚，欠円部５を形成しない場合
は、それにより加工及び位置決めが楽になる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Explaining the embodiment of the present invention in FIG. 1 (a), in the present invention, first, as shown in FIG. 3 (a), at least the rotor of the fixed hollow body 3 is engaged with the rotor of the fixed hollow body 3 side. A seizure prevention layer that does not seize even if it comes into contact with the outer peripheral surface of the rotor (usually the circled portion 5) is formed (for example, Teflon is coated to a thickness of about 0.2 mm), and the circled portion 5 is formed. The fixed hollow body 3 including the above is processed to the final size. In this case, it is desirable that the seizure prevention layer be formed on the entire surface of the fixed hollow body 3 (however, the portion A for fixing the fixed hollow body 3 to the casing).
Except). Reference numeral 14 is a positioning element as described below, which is a groove here, but may be a hole as shown in FIG. The portion C where the fixed hollow body 3 of the casing is fitted (attached) is positioned as shown in FIG.
5 (pins in the figure) are provided (each part of the casing is of course processed to the final dimensions). Next, the casing is heated or the fixed hollow body 3 is cooled, and the both are contracted and fastened by shrinkage fitting such as shrinkage fitting (cooling fitting at the time of fastening). The positioning elements 15 and 14 provided in the above are fitted to each other (the pins and the grooves are fitted to each other) and the temperature difference between the two disappears after a while, so that the fixed hollow body 3 as shown in FIG. Will be firmly fixed in the correct position on the casing by the action of the positioning elements 14, 15 (of course no further machining of the missing circle 5 is necessary thereafter). Figure 3 (e),
(F) is another embodiment of the positioning element, in which the positioning element 14 "is a groove formed in the axial direction and the positioning element 15 'is a pin provided in the radial direction.
A method of positioning and fixing the fixed hollow body 3 and the casing with a key is also conceivable. In addition, when the missing circle portion 5 is not formed, the machining and the positioning are facilitated thereby.

【０００６】[0006]

【発明の効果】本発明は従来に比し、次の様な利点があ
る。 固定中空体３は片持ちばりであり、強度・剛性上から
鉄系金属（例えばＳ４５Ｃ）製である為、従来では図２
で図１の欠円部５を形成する為の加工（欠円部５’の
加）を行なうとカッター１３の逃げやびびりが発生し、
これを避けつつ僅かずつ加工してゆく為、能率が悪い欠
点があった。本発明では図１の欠円部５を形成する為の
加工は軟質の焼き付き防止層を加工すれば良いから、加
工し易く，びびりは発生せず，能率の高い加工が行な
え、カッターの寿命も長くなる利点がある。 図１の従来では，下段側のローターのローター外周面
と固定中空体３（詳しくは欠円部５）と間隙は金属接触
・焼き付きの恐れがある為、余り縮小化する事はできな
かった。本発明では焼き付き防止層が形成されている
為、焼き付きの恐れはなく，思い切って縮小化する事が
できる。この場合，最終寸法に加工する時，固定中空体
３の欠円部５の壁面の曲率半径がケーシング内周面の曲
率半径以下である様にすると（即ち、欠円部５の壁面は
ケーシング内周面に相当する面上か，又はその内側にあ
る様に加工される）、非接触回転機械の運転による各部
の熱膨張に従って下段側のローターのローター外周面が
焼き付き防止層に接触し、軟質の焼き付き防止層を容易
に磨滅させるから（もちろん焼き付かない）、両者間の
間隙は０となる。以上から漏洩損失を大幅に減少させる
事ができる。 従来ではケーシングの加工の後に固定中空体３を取り
付け、欠円部５を加工しなければならない為、工程が煩
雑となり、手間がかかる（特に欠円部５の加工の為の心
出しが大変）上、ケーシングを加工していた工作機械を
再び使用しなければならず（ケーシングの加工が中断さ
れる），工程の流れが逆戻りして能率が悪化する欠点が
あった。本発明では固定中空体３を位置決め用要素１
４，１５を互いに合わせてケーシングに取り付ければ正
しい位置に自ずど固定され、この後の欠円部５の加工は
不要なので、この様な欠点は一切ない。従って工程が単
純化され、工程の流れが逆戻りする事もなく，極めて高
能率となる。又，従来では固定中空体３を取り付けるに
は治具が必要であったが（連通口４の位置を定める等の
為に必要）、本発明では不要である。The present invention has the following advantages over the prior art. The fixed hollow body 3 is a cantilever and is made of an iron-based metal (for example, S45C) in terms of strength and rigidity.
When the processing for forming the missing circle portion 5 in FIG. 1 (adding the missing circle portion 5 ') is performed, the cutter 13 escapes and chatters,
Since it is processed little by little while avoiding this, there is a disadvantage in inefficiency. In the present invention, the processing for forming the missing circle portion 5 in FIG. 1 may be performed by processing the soft seizure prevention layer, so that the processing is easy, chatter does not occur, highly efficient processing is possible, and the life of the cutter is long. It has the advantage of being long. In the conventional case shown in FIG. 1, the outer peripheral surface of the rotor on the lower stage side and the fixed hollow body 3 (specifically, the rounded portion 5) may contact with metal or seize. In the present invention, since the image sticking prevention layer is formed, there is no fear of image sticking, and it is possible to drastically reduce the size. In this case, when the final radius is machined, the radius of curvature of the wall surface of the hollow portion 5 of the fixed hollow body 3 is set to be equal to or less than the radius of curvature of the inner peripheral surface of the casing (that is, the wall surface of the hollow portion 5 is inside the casing). The outer peripheral surface of the rotor on the lower stage side contacts the seizure prevention layer due to the thermal expansion of each part due to the operation of the non-contact rotary machine, and it is soft. The seizure prevention layer is easily abraded (no seizure, of course), so the gap between the two is zero. From the above, leakage loss can be greatly reduced. Conventionally, the fixed hollow body 3 must be attached and the missing circle portion 5 must be processed after the casing is processed, which complicates the process and takes time (especially, the centering for the machining of the missing circle portion 5 is difficult). In addition, the machine tool used to process the casing must be used again (processing of the casing is interrupted), and the process flow reverses, resulting in a decrease in efficiency. In the present invention, the fixed hollow body 3 is attached to the positioning element 1
If 4, 5 and 15 are aligned with each other and attached to the casing, they are automatically fixed in the correct position, and the subsequent processing of the missing circle portion 5 is unnecessary, so there is no such drawback. Therefore, the process is simplified, the flow of the process does not reverse, and the efficiency is extremely high. Further, in the past, a jig was required to attach the fixed hollow body 3 (necessary for determining the position of the communication port 4, etc.), but it is not necessary in the present invention.

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

【図１】各種非接触回転機械を示す図。FIG. 1 is a view showing various non-contact rotary machines.

【図２】従来の固定中空体の取り付け方法を示す図。FIG. 2 is a view showing a conventional method of attaching a fixed hollow body.

【図３】本発明による非接触回転機械の固定中空体の取
り付け方法を示す図。FIG. 3 is a view showing a method of mounting a fixed hollow body of a non-contact rotary machine according to the present invention.

【符号の説明】[Explanation of symbols]

１は羽根，２は羽根側板，３は固定中空体，４は連通
口，５は欠円部，６は回転中心体，７は開閉口，８は作
動室，９は通路，１０・１０’はリード弁，１１は挿入
間隙，１２は円筒面，１３はカッター，１４・１４’・
１４”・１５・１５’は位置決め用要素，５’は大略に
加工された欠円部，Ｃ・Ｃ’は羽根側面である。DESCRIPTION OF SYMBOLS 1 is a blade, 2 is a blade side plate, 3 is a fixed hollow body, 4 is a communicating port, 5 is an open circle, 6 is a center of rotation, 7 is an opening / closing port, 8 is a working chamber, 9 is a passage, and 10/10 '. Is a reed valve, 11 is an insertion gap, 12 is a cylindrical surface, 13 is a cutter, and 14 ・ 14 '・
Numerals 14 ", 15 and 15 'are positioning elements, 5'is a roughly machined circular portion, and CC' is a blade side surface.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】互いに非接触状態で同期的に互いに反対方
向へ回転し合う一対のローターの内の少なくとも一方の
ローターが、回転中心体の外側に同心的に固定された固
定中空体の外周面に密接しながら前記回転中心体と一体
的に回転する羽根を有する非接触回転機械において、固
定中空体をケーシングに取り付けるに当り、固定中空体
の少なくとも固定中空体側をローターの噛み合い相手の
ローターのローター外周面が密接する部分に焼き付き防
止層が形成された固定中空体を最終寸法に形成してお
き、次に固定中空体、ケーシングに各々備えられた位置
決め用要素を互いに合わせて固定中空体をケーシングに
固定し、かくして固定中空体を正しい位置に固定する様
にした事を特徴とする非接触回転機械の固定中空体の取
り付け方法。1. An outer peripheral surface of a fixed hollow body in which at least one rotor of a pair of rotors which are synchronously rotated in mutually opposite directions in a non-contact state is concentrically fixed to the outside of a rotation center body. In a non-contact rotary machine having a blade that rotates integrally with the rotation center body while closely contacting with the rotor, at the time of attaching the fixed hollow body to the casing, at least the fixed hollow body side of the fixed hollow body meshes with the rotor A fixed hollow body having an anti-seizure layer formed in a portion where the outer peripheral surface is in close contact is formed to a final size, and then the fixed hollow body and the positioning elements provided in the casing are aligned with each other to form the fixed hollow body in the casing. The method for mounting a fixed hollow body of a non-contact rotating machine, characterized in that the fixed hollow body is fixed to the correct position in this way. 【請求項２】最終寸法に形成された固定中空体の欠円部
の壁面の曲率半径がケーシング内周面の曲率半径以下で
ある特許請求の範囲第１項記載の非接触回転機械の固定
中空体の取り付け方法。2. The fixed hollow of a non-contact rotating machine according to claim 1, wherein the radius of curvature of the wall surface of the circular portion of the fixed hollow body formed to the final dimension is equal to or less than the radius of curvature of the inner peripheral surface of the casing. How to attach the body.