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1. WO2013011637 - STATOR FOR GAS-EVACUATION PUMP, MANUFACTURING METHOD THEREFOR, PUMP PROVIDED WITH SAID STATOR, AND MANUFACTURING METHOD AND ASSEMBLY METHOD THEREFOR

Publication Number WO/2013/011637
Publication Date 24.01.2013
International Application No. PCT/JP2012/004180
International Filing Date 27.06.2012
IPC
F04C 18/16 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
18Rotary-piston pumps specially adapted for elastic fluids
08of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
12of other than internal-axis type
14with toothed rotary pistons
16with helical teeth, e.g. chevron-shaped, screw type
F04C 29/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
29Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups F04C18/-F04C28/193
CPC
F04C 18/086
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
18Rotary-piston pumps specially adapted for elastic fluids
08of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
082Details specially related to intermeshing engagement type pumps
086Carter
F04C 18/16
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
18Rotary-piston pumps specially adapted for elastic fluids
08of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
12of other than internal-axis type
14with toothed rotary pistons
16with helical teeth, e.g. chevron-shaped, screw type
F04C 2230/602
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
2230Manufacture
60Assembly methods
602Gap; Clearance
F04C 2230/91
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
2230Manufacture
90Improving properties of machine parts
91Coating
F04C 25/02
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
25Adaptations of pumps for special use of pumps for elastic fluids
02for producing high vacuum
F04C 27/004
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS
27Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
001Radial sealings for working fluid
004Radial sealing elements specially adapted for intermeshing-engagement type pumps, e.g. gear pumps
Applicants
  • 国立大学法人東北大学 TOHOKU UNIVERSITY [JP]/[JP] (AllExceptUS)
  • 岩城 征道 IWAKI, Masamichi [JP]/[JP] (UsOnly)
  • 大見 忠弘 OHMI, Tadahiro [JP]/[JP] (UsOnly)
  • 大山 健二 OHYAMA, Kenji [JP]/[JP] (UsOnly)
  • 阿久津 功 AKUTSU, Isao [JP]/[JP] (UsOnly)
Inventors
  • 岩城 征道 IWAKI, Masamichi
  • 大見 忠弘 OHMI, Tadahiro
  • 大山 健二 OHYAMA, Kenji
  • 阿久津 功 AKUTSU, Isao
Agents
  • 特許業務法人 谷・阿部特許事務所 TANI & ABE, p.c.
Priority Data
2011-16035921.07.2011JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) STATOR FOR GAS-EVACUATION PUMP, MANUFACTURING METHOD THEREFOR, PUMP PROVIDED WITH SAID STATOR, AND MANUFACTURING METHOD AND ASSEMBLY METHOD THEREFOR
(FR) STATOR DESTINÉ À UNE POMPE D'ÉVACUATION DE GAZ, PROCÉDÉ DE FABRICATION DE CE STATOR, POMPE MUNIE DUDIT STATOR, ET PROCÉDÉ DE FABRICATION ET PROCÉDÉ D'ASSEMBLAGE DE CETTE POMPE
(JA) ガス排気用ポンプのステータ及びその製造方法、並びにそのステータを備えるポンプ及びその製造方法及び組立方法
Abstract
(EN)
Provided is a stator that dramatically improves the evacuation performance of a pump and sufficiently ensures safe rotation even with dramatically reduced clearance between said stator and a screw rotor in comparison to conventional stators. The base of this stator (106) is a substrate comprising a metal such as stainless steel processed for stator use, and a PFA film is provided on the inside wall (203) of said substrate, which faces the tip surfaces (201) of the teeth of the screw rotor. The formation of the PFA film by means of melting and remelting processes after the application of PFA to the inside wall (203) results in a highly smooth free surface. This stator is disposed so as to leave a gap between the inside wall (203) of the stator (106) and the tip surfaces (201) of the teeth of a screw-tooth groove part (103). The provision of this PFA film as prescribed further reduces the width of the gap between the tip surfaces (201) and the free surface of the PFA film on the inside wall (203) in comparison to conventional stators.
(FR)
La présente invention se rapporte à un stator qui améliore considérablement les performances d'évacuation d'une pompe et qui garantit comme il convient une rotation sûre même avec un jeu extrêmement réduit entre ledit stator et un rotor à vis par rapport aux stators classiques. La base de ce stator (106) est un substrat comportant un métal, par exemple de l'acier inoxydable traité pour être utilisé dans un stator, et un film de PFA se trouve sur la paroi intérieure (203) dudit substrat, qui fait face aux surfaces de tête (201) des dents du rotor à vis. La formation du film de PFA grâce à des procédés de fusion et de refusion après l'application du PFA sur la paroi intérieure (203) permet d'obtenir une surface libre très lisse. Ledit stator est placé de manière à ce qu'un interstice existe entre la paroi intérieure (203) du stator (106) et les surfaces de tête (201) des dents d'une partie rainure à dents à vis (103). L'utilisation de ce film de PFA, telle qu'imposée, réduit encore plus la largeur de l'interstice entre les surfaces de tête (201) et la surface libre du film de PFA sur la paroi intérieure (203) par rapport aux stators classiques.
(JA)
 スクリューロ-ターとステータとの間隙の幅を従来に比べて格段に狭小にしても回転の安全性の確保を十分取ることができ、ポンプの排気性能を格段に高めることのできるステータを提供する。本発明のステータ(106)は、ステータ用に加工されたステンレスなどの金属からなる基材を構成母体とし、基材のスクリューローターの歯の先端面(201)に対面する内壁面(203)上にPFA膜が設けられてある。PFA膜は、内壁面(203)にPFAを塗装後、溶融と再溶融の過程を経て形成されることで、その自由表面に高い平滑性が付与される。本発明のステータは、ステータ(106)の内壁面(203)とスクリュー歯溝部(103)の歯の先端面(201)との間に間隔を置いて配置される。内壁面(203)上のPFA膜の自由表面と先端面(201)との間隔の幅は、本発明のPFA膜が所定通り設けられることで、従来に比べ一段と狭小とすることが出来る。
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