WO2005124158A1 - 耐放射線用分子ポンプ - Google Patents
耐放射線用分子ポンプ Download PDFInfo
- Publication number
- WO2005124158A1 WO2005124158A1 PCT/JP2005/011017 JP2005011017W WO2005124158A1 WO 2005124158 A1 WO2005124158 A1 WO 2005124158A1 JP 2005011017 W JP2005011017 W JP 2005011017W WO 2005124158 A1 WO2005124158 A1 WO 2005124158A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- molecular pump
- radiation
- magnetic bearing
- electric wire
- pump housing
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
Definitions
- the present invention relates to a radiation-resistant molecular pump used in a place where strong radiation is irradiated, such as an accelerator and a fusion reactor.
- Patent Document 1 JP-A-8-338394
- Patent Document 1 The technique described in Patent Document 1 has a problem in that the coating material of the electric wire used inside the molecular pump is entirely made of ceramic, and the cost of the electric wire coated with ceramic increases. Was.
- the present invention provides a magnetic bearing portion of a rotor and a drive motor in a pump housing.
- the inner electric wire connected to the magnetic bearing part and the driving motor part was covered with a covering material having a polyether 'ether' ketone force.
- the insulating power of the electric wire used for the internal wiring of the molecular pump is high, and it can withstand high-dose radiation and high-temperature baking. This has the effect of providing a molecular pump suitable for use as an evacuation device for a fusion reactor or the like.
- FIG. 1 is a longitudinal sectional view of the composite molecular pump 1 of the first embodiment.
- the composite molecular pump 1 includes a turbo molecular pump section 2 and a thread groove vacuum pump section 3 connected to a stage subsequent to the turbo molecular pump section 2.
- Reference numeral 4 denotes a rotor.
- the rotor 4 has a closed cylindrical shape.
- the turbo molecular pump section 2 is formed above the rotor 4, and the thread groove vacuum pump section is formed below the rotor 4. 3 is formed.
- a rotating shaft 5 is inserted through the center of the rotor 4, and the top of the rotating shaft 5 is fixed by abutting against the back surface of the head of the rotor 4.
- Reference numeral 6 denotes an upper casing.
- the upper casing 6 is formed so as to cover the outer periphery of the turbo-molecular pump unit 2, and has an intake port 2a at an upper end.
- Reference numeral 7 denotes an intermediate casing.
- the intermediate casing 7 is provided continuously below the upper casing 6 and is formed so as to cover an outer peripheral portion of the screw groove vacuum pump unit 3.
- Reference numeral 8 denotes a lower casing.
- the lower casing 8 is provided continuously below the intermediate casing 7, has a bearing nosing 9 inside, and has an exhaust port 8a outside.
- the upper casing 6, the intermediate casing 7, and the lower casing 8 form the pump casing.
- reference numeral 10 denotes a base portion, and the base portion 10 covers the lower surface of the lower casing 8. , Forming the basis of the composite molecular pump 1.
- the rotating shaft 5 is supported in the bearing housing 9 via an induction motor 11 for driving the rotating shaft, upper and lower radial magnetic bearings 12, 13 and a thrust magnetic bearing 14.
- a DC brushless motor may be used as the motor 11 for driving the rotating shaft.
- the radial magnetic bearings 12 and 13 each include a radial position sensor (gap sensor) 12a or 13a and an electromagnetic excitation coil 12b or 13b, and the thrust magnetic bearing 14 is an axial position sensor. (Gap sensor) 14a and electromagnet excitation coil 14b.
- the induction motor 11 includes a stator coil 11a.
- Reference numeral 15 denotes a connector for external wiring, and the connector 15 protrudes from the lower case 8.
- the ⁇ Ko connector 15 are arranged in parallel a plurality of pins 15a are insulates between these pins to be hardened with an insulating material l 5b polyether 'ether. Ketone.
- the pin 15a is made of iron alloy or copper alloy coated with nickel plating or gold plating.
- the pins 15a are connected to the gap sensors 12a, 13a, 14a and the coils 11a, 12b, 13b, 14b, respectively, using electric wires 16 coated with polyether 'ether' ketone. ing.
- the insulating material polyether / ether / ketone is an engineering plastic having high heat resistance and excellent durability against radiation irradiation.
- PEEK450G (trade name).
- the connector 15 is connected to a controller 17 installed outside the case of the molecular pump 1 by an external electric wire 18 as shown in FIG. , 13a, and 14a, and a controller 17b for controlling the current to the coils la, 12b, 13b, and 14b, and the controller 17 is driven by an accelerator, a fusion reactor, or the like. ! , Not affected by radiation! /, Installed in place.
- metal O-rings made of metal tubes were used for 19a, 19b, 19c, 19d and 19e. This is more heat-resistant than the conventional O-ring made of silicone rubber, etc. Excellent in terms of resistance and radiation resistance!
- the composite molecular pump 1 is connected to an intake port 2 a on the side of an apparatus such as a fusion reactor that exhausts air, and rotates the rotor 4 at a high speed by an induction motor 11 to evacuate the apparatus.
- Exhaust gas (such as hydrogen and its isotope in the case of a fusion reactor) is sucked from the inlet 2a, passes through the turbo molecular pump section 2, then the thread groove vacuum pump section 3, and is discharged from the exhaust port 8a.
- the rotating shaft 5 fixed to the rotor 4 is supported by radial magnetic bearings 12 and 13 at the upper and lower parts of the rotating shaft 5 and a thrust magnetic bearing 14 at the lower end of the rotating shaft 5.
- Each of these bearings has a gap sensor 12b or 13b or 14a for measuring the gap of each bearing, and a signal from these gap sensors is supplied to an amplifier 17a in an external controller 17. It is told to.
- the gap signal amplified by the amplifying unit 17a is transmitted to a control unit 17b in the controller 17, and the gap signal of the magnetic bearings 12, 13, 14 is set to be within a predetermined value. Controlling.
- the magnetic bearings 12, 13, 14, and the electric wire 16 of the internal wiring connecting the induction motor 11 and the pin 15 a of the connector 15 are made of polyether-ether excellent in heat resistance and radiation resistance even when displaced. Since it has a coating made of ketone, the insulation of the internal electric wires 16 is not deteriorated even by strong radiation from an accelerator, a nuclear fusion furnace, or the like. It can withstand high-temperature baking for removing hydrogen molecules, and the coating does not peel off even if the internal wiring wire 16 is bent.
- the connector 15 was filled with polyether 'ether' ketone between the pins 15a and insulated.
- a molecular pump for radiation resistance was formed using the electric component having excellent heat resistance and radiation resistance.
- the internal electric wire 16 is coated with polyether 'ether' ketone, and the coils 12b, 13b, 14b of the magnetic bearings 12, 13, 14 and the induction motor All of the coils 11a of 11 are coated with a ceramic coating. These coils may be coated with polyether, ether, and ketone.
- a conventional fluoro resin such as Teflon (registered trademark) is used.
- Teflon registered trademark
- a point force using an electric wire having a polyamide resin coating such as nylon coated on the outer periphery with polyimide or polyimide'amide is different from that of the first embodiment.
- Polyimide is a plastic having high strength and heat resistance. Since it is hard and difficult to form, it can be mixed with polyamide (nylon) to have appropriate hardness and elasticity. It turned out to be a wire covering material having excellent radiation resistance.
- the composite molecular pump of this embodiment is also suitable for use in places where strong radiation is irradiated, such as accelerators and fusion reactors.
- the present invention is used for a molecular pump for evacuating a device to which strong radiation is applied, such as an experimental device for a fusion reactor or an accelerator.
- FIG. 1 is a longitudinal sectional view of a composite molecular pump of Example 1.
- FIG. 2 is an explanatory diagram of a control system according to the first embodiment.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Non-Positive Displacement Air Blowers (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-179752 | 2004-06-17 | ||
JP2004179752A JP2006002664A (ja) | 2004-06-17 | 2004-06-17 | 耐放射線用分子ポンプ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005124158A1 true WO2005124158A1 (ja) | 2005-12-29 |
Family
ID=35509752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/011017 WO2005124158A1 (ja) | 2004-06-17 | 2005-06-16 | 耐放射線用分子ポンプ |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2006002664A (ja) |
WO (1) | WO2005124158A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104564786A (zh) * | 2014-12-23 | 2015-04-29 | 中国原子能科学研究院 | 真空涡轮分子泵 |
CN105526180A (zh) * | 2016-01-29 | 2016-04-27 | 天津飞旋科技研发有限公司 | 磁悬浮复合分子泵 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5490296A (en) * | 1977-09-07 | 1979-07-17 | Ici Ltd | Thermoplastic polyether aromatic ketone |
JPH0414793U (ja) * | 1990-05-24 | 1992-02-06 | ||
JPH05144328A (ja) * | 1991-11-22 | 1993-06-11 | Hitachi Cable Ltd | 耐放射線性電線 |
JPH06323984A (ja) * | 1993-05-13 | 1994-11-25 | Hitachi Ltd | 腐食監視方法及び監視装置並びにこれを用いた原子力プラント |
JPH0817258A (ja) * | 1994-06-30 | 1996-01-19 | Nissei Denki Kk | ポリエーテルエーテルケトン樹脂被覆電線・ケーブル |
JPH10103288A (ja) * | 1996-10-01 | 1998-04-21 | Shimadzu Corp | ターボ分子ポンプ |
JP3087896B1 (ja) * | 1999-11-10 | 2000-09-11 | 川崎重工業株式会社 | 放射性物質収納キャスク |
JP3510007B2 (ja) * | 1995-06-13 | 2004-03-22 | 日本原子力研究所 | 分子ポンプ |
-
2004
- 2004-06-17 JP JP2004179752A patent/JP2006002664A/ja not_active Withdrawn
-
2005
- 2005-06-16 WO PCT/JP2005/011017 patent/WO2005124158A1/ja active Application Filing
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5490296A (en) * | 1977-09-07 | 1979-07-17 | Ici Ltd | Thermoplastic polyether aromatic ketone |
JPH0414793U (ja) * | 1990-05-24 | 1992-02-06 | ||
JPH05144328A (ja) * | 1991-11-22 | 1993-06-11 | Hitachi Cable Ltd | 耐放射線性電線 |
JPH06323984A (ja) * | 1993-05-13 | 1994-11-25 | Hitachi Ltd | 腐食監視方法及び監視装置並びにこれを用いた原子力プラント |
JPH0817258A (ja) * | 1994-06-30 | 1996-01-19 | Nissei Denki Kk | ポリエーテルエーテルケトン樹脂被覆電線・ケーブル |
JP3510007B2 (ja) * | 1995-06-13 | 2004-03-22 | 日本原子力研究所 | 分子ポンプ |
JPH10103288A (ja) * | 1996-10-01 | 1998-04-21 | Shimadzu Corp | ターボ分子ポンプ |
JP3087896B1 (ja) * | 1999-11-10 | 2000-09-11 | 川崎重工業株式会社 | 放射性物質収納キャスク |
Also Published As
Publication number | Publication date |
---|---|
JP2006002664A (ja) | 2006-01-05 |
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