JPH04362204A - Noncontact type rotary machine - Google Patents
Noncontact type rotary machineInfo
- Publication number
- JPH04362204A JPH04362204A JP25017891A JP25017891A JPH04362204A JP H04362204 A JPH04362204 A JP H04362204A JP 25017891 A JP25017891 A JP 25017891A JP 25017891 A JP25017891 A JP 25017891A JP H04362204 A JPH04362204 A JP H04362204A
- Authority
- JP
- Japan
- Prior art keywords
- blades
- center body
- rotation center
- blade
- circumferential surface
- 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.)
- Withdrawn
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Rotary Pumps (AREA)
Abstract
Description
【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互いに反対方向へ回転し合い、ポ
ンプや膨張機として機能する非接触回転機械に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact rotating machine in which a pair of rotors synchronously rotate in opposite directions in a non-contact manner to function as a pump or an expander.
【０００２】0002
【従来の技術】本発明を理解する為に、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（ニ）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を有しており（図１（
ニ）では下段側のローターも同様の構成となっている）
、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）の側面図を描いた図１（ロ）
をも参照）。この場合、羽根１と一体構造となった羽根
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。下段側のロー
ターはローター外周面が固定中空体３に密接する様にさ
れ、固定中空体３に欠円部５を形成し、面状に密接させ
てシール性を向上させるのが良い。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）によって創成され、本発明に係わるこれらの非接
触回転機械はポンプ又は膨張機として機能するものであ
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、ポンプとして機能す
る場合を説明すると、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
へ吐出される様になっている。さて以上の様な非接触回
転機械においては図１（ロ）からも明らかな様に羽根１
は遠心力や流体の圧力による（等）分布荷重を受ける１
端固定の片持ばりと考えられ、羽根１の軸方向長をＬと
すると最大たわみδｍａｘはＬの４乗に比例する為、前
記Ｌを増すとδｍａｘは急激に増大し、羽根１の羽根外
周面とケーシング内周面との接触の危険が生ずるから、
前記Ｌを余り大きくする事はできず、従って大容量機の
製作は困難である。又、前記δｍａｘに相当する分だけ
羽根１の羽根外周面とケーシング内周面との間のシール
間隙を予め余分に見込まねばならず、漏洩損失が増大す
る上、前記Ｌを適度な長さにしたとしても回転速度を高
めると前記δｍａｘが増す為、余り高速回転できない欠
点がある。2. Description of the Related Art In order to understand the present invention, the non-contact rotating machine will first be explained. In the various non-contact rotating machines shown in FIG. 1, the upper rotor in FIGS. It has a blade 1 that rotates integrally with the rotation center body 6 while being in close contact with the rotation center body 6 (see Fig. 1).
In (d), the lower rotor has a similar configuration)
, and the rotor on the lower stage synchronously rotate in opposite directions by synchronous gears in a non-contact state with each other (Figure 1 (B) is a representative side view of Figure 1 (A)).
(see also). In this case, the rotation center body 6 is press-fitted into the blade side plate 2 which is integrally constructed with the blade 1, so that the blade 1 and the rotation center body 6 rotate integrally. It is preferable that the rotor outer peripheral surface of the lower rotor is brought into close contact with the fixed hollow body 3, and the fixed hollow body 3 is formed with a cutout portion 5 to bring the rotor into close contact with the fixed hollow body 3 in a planar manner to improve sealing performance. The line C of the upper rotor is created by the tip (point or small roundness) of the line L of the lower rotor, and these non-contact rotating machines according to the present invention function as a pump or an expander. If the action of the pump is reversed (the rotor rotates in the opposite direction), it functions as an expander, so to explain the case where it functions as a pump, the fluid sucked into the working chamber 8 from the passage 9 is compressed as the rotor rotates. When the opening/closing port 7 communicates with the communication port 4 while the fluid is being opened and closed, the fluid is discharged into the rotation center body 6 through the respective ports. Now, in the non-contact rotating machine as described above, as is clear from Fig. 1 (b), the blade 1
is subjected to distributed loads (such as) due to centrifugal force and fluid pressure1
It is considered to be a cantilever beam with a fixed end, and if the axial length of the blade 1 is L, the maximum deflection δmax is proportional to the fourth power of L. Therefore, when L is increased, δmax increases rapidly, and the outer circumference of the blade 1 increases. There is a risk of contact between the surface and the inner circumferential surface of the casing.
The above-mentioned L cannot be made too large, and therefore it is difficult to manufacture a large-capacity machine. In addition, an extra seal gap between the outer circumferential surface of the blade 1 and the inner circumferential surface of the casing must be allowed in advance by an amount corresponding to the above-mentioned δmax, which increases leakage loss. Even if this is the case, increasing the rotation speed increases the δmax, so there is a drawback that high speed rotation is not possible.
【０００３】0003
【発明が解決しようとする問題点】本発明の目的は、羽
根１の最大たわみを小さく抑え、以って羽根１の羽根外
周面とケーシング内周面との間のシール間隙を縮小化し
て漏洩損失を減少させ、かつ高速回転が可能であり、大
型機も容易に製作できる様にするところにある。[Problems to be Solved by the Invention] An object of the present invention is to suppress the maximum deflection of the blade 1 to a small value, thereby reducing the seal gap between the outer peripheral surface of the blade 1 and the inner peripheral surface of the casing, thereby preventing leakage. The purpose is to reduce loss, enable high-speed rotation, and easily manufacture large machines.
【０００４】0004
【問題を解決する為の手段】本発明は従来の欠点を解決
する為に、回転中心体の外周面から突出しながら噛み合
い相手のローターのローター外周面に密接する円筒面を
羽根の軸方向中間位置に相当する回転中心体の部位に形
成すると共に前記羽根が前記円筒面から延びてくる様に
構成して前記羽根と回転中心体とを一体・結合させ、か
つ前記回転中心体に羽根の遠心力による前記円筒面のひ
ずみを減少させる補強部材を備え、更に前記羽根の両端
部側から固定中空体が各々延びてくる様に備えたのであ
る。[Means for Solving the Problems] In order to solve the conventional drawbacks, the present invention provides a cylindrical surface that protrudes from the outer circumferential surface of the rotation center body and is in close contact with the rotor outer circumferential surface of the mating rotor at an axially intermediate position of the blade. The blades are formed at a portion of the rotation center body corresponding to the rotation center body, and the blades are configured so as to extend from the cylindrical surface, so that the blades and the rotation center body are integrated and connected, and the centrifugal force of the blades is applied to the rotation center body. The blade is provided with a reinforcing member to reduce the strain on the cylindrical surface caused by the blade, and further provided with fixed hollow bodies extending from both ends of the blade.
【０００５】[0005]
【実施例】図２（イ）は本発明による非接触回転機械の
一実施例で（図１（イ）のものに本発明を実施したが、
他のものにも同様に実施できる）、回転中心体６の外周
面（固定中空体３の内周面に密接する部分）から突出し
ながら噛み合い相手のローター（下段側のローター）の
ローター外周面に密接する円筒面１１を羽根１の軸方向
中間位置に相当する回転中心体６の部位に形成すると共
に羽根１が円筒面１１から延びてくる様に構成して羽根
１と回転中心体６とを一体・結合させ、更に羽根１の両
端部側から固定中空体３が各々延びてくる様に備えてあ
る。即ち、羽根１の軸方向中間位置で羽根１と回転中心
体６とが一体・結合しており、この部分ではＸ−Ｘ′断
面の如く羽根１の羽根側面（線Ｃ，Ｃ′）に連続する円
筒面１１（回転中心体６の外径より大）が形成され、こ
の円筒面１１が下段側のローターのローター外周面に密
接する事によって作動室内の流体をシールしているので
ある。Ｙ−Ｙ′断面とＺ−Ｚ′断面とは同一であり、挿
入間隙１０には固定中空体３が挿入され、この固定中空
体３が下段側のローターのローター外周面に密接する事
によって作動室内の流体をシールしているのである。更
にＸ−Ｘ′断面に示す如く羽根１の遠心力による円筒面
１１のひずみ（半径方向ひずみ）を減少させる補強部材
１２が回転中心体６に備えられている。この場合、補強
部材１２は回転中心体６の内周面に溶接（電気抵抗溶接
など）して固定されているが、図２（ロ）の如くボルト
状の補強部材１２を一方の羽根１を貫通する如く回転中
心体６内へ挿入して固定する様にしても良い。補強部材
１２は二点鎖線示の如くもう一方の羽根１まで貫通する
如く備えても良いが、挿入口１３は例えばテフロン等の
合成樹脂を埋め込んで、羽根１の形状を崩さない様にし
ておく。又、図２（ハ）の如く回転中心体６を鋳造で製
造する際、補強部材１２を鋳ぐるんで回転中心体６に固
定する様にしても良い（通常は羽根１と回転中心体６と
は鋳造によって一体成形物として製造するが、回転中心
体６に羽根１を溶接する事もある）。次に図２（イ）で
は流体は回転中心体６の一方の側から出入りする構成と
なっているが、図２（ニ）の如く両方の側から出入りす
る様にしても良い。流体は回転中心体６の両方の側から
出入りするから、補強部材１２は回転中心体６内を二分
割する隔壁の如く備える事ができる（必要あれば二点鎖
線示の如く小径の穴を形成しても良い）。非接触回転機
械を駆動したり（ポンプの場合）、発生動力を取り出す
（膨張機の場合）場合は同期歯車と噛み合う図示しない
歯車を介して行なう様にする。Ｙ−Ｙ′断面、Ｚ−Ｚ′
断面は図２（イ）と同じである。尚、連通口４，開閉口
７（図１（イ）参照）はＹ−Ｙ′断面，Ｚ−Ｚ′断面に
形成する事は言うまでもない（図２（イ）の場合も同様
）。ところで図２（イ）においてＨは外部配管へ接続す
る接続口具であり、接続口具Ｈと軸受との間には一般に
はオイルシールとカーボンリングパッキン等の軸封装置
が備えられ、７気圧用空気圧縮機を例にとると前記カー
ボンリングパッキンは３組位が普通であるが、図４（イ
）の如く回転中心体６の端部の外周面に密接しながらこ
れを囲む如く接続口具Ｈを備え、接続口具Ｈの内周面に
回転中心体６の外周面とが密接し合う部分の少なくとも
いずれか一方にラビリンス溝を形成すれば、軸封装置は
構造が簡単となり、コスト減となる（例えば前記カーボ
ンリングパッキンは２組で良い）。この場合、回転中心
体６の長さ自体は長くなるが、回転中心体６の端部を囲
む如く接続口具Ｈが備えられているので、非接触回転機
械の全長は長くはならない。又、低圧力比（１．５〜２
．０）の下で使用する場合は前記ラビリンス溝を形成す
る事により接続口具Ｈと軸受との間には軸封装置を省略
する事ができるが（但しオイルシールは必要）、図４（
ロ）の如くオイルシールに働く圧力を抜く圧抜き通路１
４は接続口具Ｈに形成すると、加工が容易となる。
以上は図１のものにも、更には図２（ニ）の右側の接続
口具Ｈ′にも同様に実施できる事は言うまでもない。[Example] Figure 2 (A) shows an example of a non-contact rotating machine according to the present invention (the present invention was implemented in the one shown in Figure 1 (A), but
The same can be applied to other rotors), while protruding from the outer circumferential surface of the rotation center body 6 (the part that is in close contact with the inner circumferential surface of the fixed hollow body 3), and attaching to the rotor outer circumferential surface of the mating rotor (lower rotor). A cylindrical surface 11 in close contact with each other is formed at a portion of the rotation center body 6 corresponding to an intermediate position in the axial direction of the blade 1, and the blade 1 is configured to extend from the cylindrical surface 11 to connect the blade 1 and the rotation center body 6. They are integrally connected and fixed hollow bodies 3 are provided extending from both ends of the blade 1, respectively. That is, the blade 1 and the rotation center body 6 are integrated and connected at an intermediate position in the axial direction of the blade 1, and at this part, the blade 1 is continuous with the blade side surface (lines C, C') as shown in the X-X' cross section. A cylindrical surface 11 (larger than the outer diameter of the rotation center body 6) is formed, and this cylindrical surface 11 seals the fluid in the working chamber by coming into close contact with the outer peripheral surface of the rotor of the lower stage rotor. The Y-Y' cross section and the Z-Z' cross section are the same, and the fixed hollow body 3 is inserted into the insertion gap 10, and the fixed hollow body 3 is operated by coming into close contact with the outer peripheral surface of the rotor of the lower rotor. It seals the fluid inside the room. Further, as shown in the XX' cross section, the rotation center body 6 is provided with a reinforcing member 12 for reducing strain (radial strain) on the cylindrical surface 11 due to the centrifugal force of the blade 1. In this case, the reinforcing member 12 is fixed by welding (electric resistance welding, etc.) to the inner peripheral surface of the rotation center body 6, but as shown in FIG. It may be inserted into the rotation center body 6 so as to penetrate therethrough and fixed therein. The reinforcing member 12 may be provided so as to penetrate to the other blade 1 as shown by the two-dot chain line, but the insertion opening 13 is filled with synthetic resin such as Teflon so as not to change the shape of the blade 1. . Furthermore, when manufacturing the rotational center body 6 by casting as shown in FIG. is manufactured as an integrally molded product by casting, but sometimes the blades 1 are welded to the rotating center body 6). Next, in FIG. 2(A), the fluid enters and exits from one side of the rotating center body 6, but it may be configured to enter and exit from both sides as shown in FIG. 2(D). Since fluid enters and exits from both sides of the rotation center body 6, the reinforcing member 12 can be provided like a partition wall that divides the inside of the rotation center body 6 into two (if necessary, a small diameter hole can be formed as shown by the two-dot chain line). ). When driving a non-contact rotating machine (in the case of a pump) or extracting generated power (in the case of an expander), this is done through a gear (not shown) that meshes with a synchronous gear. Y-Y' cross section, Z-Z'
The cross section is the same as FIG. 2(a). It goes without saying that the communication port 4 and opening/closing port 7 (see FIG. 1(A)) are formed in the Y-Y' cross section and the Z-Z' cross section (the same applies to the case of FIG. 2(A)). By the way, in Fig. 2 (a), H is a connection fitting that connects to external piping, and a shaft sealing device such as an oil seal and carbon ring packing is generally provided between the connection fitting H and the bearing, and the pressure is 7 atm. Taking a commercial air compressor as an example, there are usually three sets of carbon ring packings, but as shown in FIG. If a labyrinth groove is formed in at least one of the parts where the inner circumferential surface of the connecting port H and the outer circumferential surface of the rotation center body 6 come into close contact with each other, the structure of the shaft sealing device can be simplified and the cost can be reduced. (For example, two sets of carbon ring packings are sufficient). In this case, although the length of the rotation center body 6 itself becomes longer, since the connection fitting H is provided so as to surround the end of the rotation center body 6, the total length of the non-contact rotating machine does not become longer. Also, low pressure ratio (1.5~2
．． 0), by forming the labyrinth groove described above, it is possible to omit the shaft seal device between the connection fitting H and the bearing (however, an oil seal is required).
Pressure relief passage 1 to release the pressure acting on the oil seal as shown in b)
If 4 is formed into the connection fitting H, processing becomes easy. It goes without saying that the above can be implemented in the same way for the connection fitting H' shown in FIG. 1, and furthermore, on the right side in FIG.
【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。■本発明では羽根１と回転中心体６とは羽根１の軸
方向中間位置で一体・結合している為、羽根１の固定端
から自由端までの長さは短縮化され、羽根１の全長を従
来と同一とすれば最大たわみは格段に小さくなり、最大
たわみを同一とすれば羽根１の全長（ローター長）を長
くして容量を増大させる事もできる（大容量機が製作可
能）、又、羽根１の最大たわみを大幅に減少させる事が
できるから、高速回転させて容量を増す事が可能となる
。■固定中空体３も流体の圧力を受ける一端固定の片持
ばりと考えられ、本発明では固定中空体の固定端から自
由端までの長さは大幅に短かくなり、固定中空体３の長
さを従来と同一とすれば最大たわみは格段に小さくなり
、最大たわみを同一とすれば固定中空体３の長さを長く
して大容量機の製作を可能とするのである。■羽根１に
遠心力が働くと図３（イ）の如く回転心体６は引張られ
、円筒面１１はひずむ。本発明では図３（ロ）の如く補
強部材１２が備えらている為、円筒面１１のひずみは大
幅に減少する（回転中心体６は一種の曲がりばりであり
、ひずみ易いが、補強部材１２には単純な引張り力のみ
が作用し、極めてひずみにくい）。従って羽根１の羽根
外周面とケーシング内周面との接触の危険はそれだけ少
なく、高速回転させて容量を増す事ができる。又、結果
として漏洩損失が減少する効果も生まれる。[Effects of the Invention] The present invention has the following advantages over the prior art. ■In the present invention, since the blade 1 and the rotation center body 6 are integrated and connected at an intermediate position in the axial direction of the blade 1, the length from the fixed end to the free end of the blade 1 is shortened, and the total length of the blade 1 is shortened. If the maximum deflection is kept the same as before, the maximum deflection will be much smaller, and if the maximum deflection is kept the same, the capacity can be increased by increasing the total length of the blade 1 (rotor length) (a large capacity machine can be manufactured). Furthermore, since the maximum deflection of the blade 1 can be significantly reduced, it is possible to rotate at high speed and increase capacity. ■The fixed hollow body 3 is also considered to be a cantilever beam with one end fixed, which receives the pressure of the fluid, and in the present invention, the length from the fixed end to the free end of the fixed hollow body is significantly shortened, and the length of the fixed hollow body 3 is If the length is the same as the conventional one, the maximum deflection will be significantly smaller, and if the maximum deflection is the same, the length of the fixed hollow body 3 can be increased, making it possible to manufacture a large-capacity machine. (2) When centrifugal force acts on the blade 1, the rotating center body 6 is pulled as shown in FIG. 3(A), and the cylindrical surface 11 is distorted. In the present invention, since the reinforcing member 12 is provided as shown in FIG. (Only a simple tensile force acts on it, and it is extremely hard to distort.) Therefore, there is less risk of contact between the outer peripheral surface of the blade 1 and the inner peripheral surface of the casing, and the capacity can be increased by rotating at high speed. Moreover, as a result, the effect of reducing leakage loss is also produced.
【図１】各種非接触回転機械を示す図。FIG. 1 is a diagram showing various non-contact rotating machines.
【図２】本発明による非接触回転機械を示す図。FIG. 2 is a diagram showing a non-contact rotating machine according to the present invention.
【図３】羽根の遠心力による円筒面のひずみを説明する
図。FIG. 3 is a diagram illustrating the distortion of the cylindrical surface due to the centrifugal force of the blade.
【図４】ラビリンス溝形成により軸封装置が簡素化する
事を説明する図。FIG. 4 is a diagram illustrating that the shaft sealing device is simplified by forming a labyrinth groove.
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は挿入間隙、１１は円筒面、１２は
補強部材、１３は挿入口、１４は圧抜き通路、Ｈ・Ｈ′
は接続口具、Ｃ・Ｃ′は羽根側面を示す。1 is a blade, 2 is a blade side plate, 3 is a fixed hollow body, 4 is a communication port, 5 is a missing circular part, 6 is a rotation center body, 7 is an opening/closing port, 8 is an operating chamber, 9 is a passage, 10 is an insertion gap , 11 is a cylindrical surface, 12 is a reinforcing member, 13 is an insertion port, 14 is a pressure relief passage, H/H'
indicates the connection fitting, and C and C' indicate the side surfaces of the blade.
Claims (1)
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備え、作動室が前記固定中空体
に形成された連通口及び前記回転中心体に形成された開
閉口を介して前記回転中心体内へ連通する様に構成した
非接触回転機械において、前記回転中心体の外周面から
突出しながら噛み合い相手のローターのローター外周面
に密接する円筒面を羽根の軸方向中間位置に相当する回
転中心体の部位に形成すると共に前記羽根が前記円筒面
から延びてくる様に構成して前記羽根と回転中心体とを
一体・結合させ、かつ前記回転中心体に羽根の遠心力に
よる前記円筒面のひずみを減少させる補強部材を備え、
更に前記羽根の両端部側から固定中空体が各々延びてく
る様に備えた事を特徴とする非接触回転機械。Claim 1: An outer circumferential surface of a fixed hollow body in which at least one of a pair of rotors that rotates synchronously in opposite directions in a non-contact state is fixed concentrically to the outside of a rotation center body. A working chamber is provided with a blade that rotates integrally with the rotation center body while being in close contact with the rotation center body, and an operating chamber enters the rotation center body through a communication port formed in the fixed hollow body and an opening/closing opening formed in the rotation center body. In a non-contact rotating machine configured to communicate with each other, a cylindrical surface that protrudes from the outer circumferential surface of the rotation center body and is in close contact with the rotor outer circumference surface of a mating rotor is a portion of the rotation center body that corresponds to an axially intermediate position of the blades. and configured so that the blades extend from the cylindrical surface to integrate and connect the blades and the rotational center body, and to reduce distortion of the cylindrical surface due to the centrifugal force of the blades on the rotational center body. Equipped with a reinforcing member that allows
A non-contact rotating machine further comprising fixed hollow bodies extending from both ends of the blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25017891A JPH04362204A (en) | 1991-06-10 | 1991-06-10 | Noncontact type rotary machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25017891A JPH04362204A (en) | 1991-06-10 | 1991-06-10 | Noncontact type rotary machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04362204A true JPH04362204A (en) | 1992-12-15 |
Family
ID=17203982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25017891A Withdrawn JPH04362204A (en) | 1991-06-10 | 1991-06-10 | Noncontact type rotary machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04362204A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008255796A (en) * | 2007-03-30 | 2008-10-23 | Anest Iwata Corp | Shaft seal device of oil-free rotary compressor |
-
1991
- 1991-06-10 JP JP25017891A patent/JPH04362204A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008255796A (en) * | 2007-03-30 | 2008-10-23 | Anest Iwata Corp | Shaft seal device of oil-free rotary compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980903 |