Rotating machine having a shaft including an integral bearing surface
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0718032
(2003-11-19)
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발명자
/ 주소 |
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출원인 / 주소 |
- ITT Manufacturing Enterprises, Inc.
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대리인 / 주소 |
Ware, Fressola, Van Der Sluys &
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인용정보 |
피인용 횟수 :
8 인용 특허 :
10 |
초록
▼
A shaft (12) for a pump (10) or other rotating machine, made substantially out of only engineering plastic--such as the polymer PEEK or some other selected polymer--and including portions having respective surfaces (12a-d) serving as bearing surfaces, the shaft (12) thus integrating the functions of
A shaft (12) for a pump (10) or other rotating machine, made substantially out of only engineering plastic--such as the polymer PEEK or some other selected polymer--and including portions having respective surfaces (12a-d) serving as bearing surfaces, the shaft (12) thus integrating the functions of both a shaft structure and a bearing structure. In some applications, the shaft (12) includes both portions having respective surfaces serving as radial bearing surfaces (12a-b) and also portions having respective surfaces serving as thrust bearing surfaces (12c-d), all made from the same engineering plastic as the rest of the shaft (12) and formed as part of the shaft (12). The engineering plastic may include one or more additives such as PTFE or carbon fiber, especially in case of dry-run applications.
대표청구항
▼
What is claimed is: 1. A shaft (12) for a rotating machine (10), characterized in that: the shaft (12) is made substantially out of engineering plastic and includes a portion (12a-d) having one or more surfaces (12a-d) serving as respective bearing surfaces and formed from the same engineering plas
What is claimed is: 1. A shaft (12) for a rotating machine (10), characterized in that: the shaft (12) is made substantially out of engineering plastic and includes a portion (12a-d) having one or more surfaces (12a-d) serving as respective bearing surfaces and formed from the same engineering plastic as the rest of the shaft (12), the shaft (12) thereby integrating the functions of both a shaft structure and one or more bearing structures; wherein the shaft (12) includes one or more portions (12a-b) having respective surfaces serving as respective radial bearing surfaces and one or more portions (12c-d) having respective surfaces serving as respective thrust bearing surfaces. 2. The shaft (12) of claim 1, wherein the engineering plastic is a material including a selected polymer. 3. The shaft (12) of claim 2, wherein the selected polymer is poly-ether-ether-ketone (PEEK). 4. The shaft (12) of claim 2, wherein the selected polymer is polyimide. 5. The shaft (12) of claim 1, wherein carbon fiber is substantially uniformly distributed throughout the engineering plastic material. 6. The shaft (12) of claim 1, wherein graphite is substantially uniformly distributed throughout the engineering plastic material. 7. The shaft (12) of claim 1, wherein polytetrafluoroethylene (PTFE) is substantially uniformly distributed throughout the engineering plastic material. 8. The shaft (12) of claim 1, further characterized in that at least some of the one or more bearing surfaces (12a-d) mate with corresponding stator bearing surfaces (16a-d) of the rotating machine (10) during operation of the rotating machine (10). 9. A rotating machine (10), comprising a shaft ( 12) according to claim 1. 10. A rotating machine (10) as in claim 9, wherein the rotating machine (10) is adapted so that at least the bearing surface (12a-d) is lubricated or wet during operation in a wet-rotor application. 11. A rotating machine (10) as in claim 9, wherein the rotating machine (10) is a pump. 12. A rotating machine (10) as in claim 9, wherein a structure not made from the engineering plastic is mechanically attached or bonded to the shaft (12). 13. A rotating machine (10) as in claim 9, wherein the rotating machine (10) is a wet-rotor pump. 14. A rotating machine (10) as in claim 9, wherein the rotating machine (10) is a centrifugal pump. 15. A rotating machine (10) as in claim 9, wherein the shaft is included in a rotor (11), and the rotating machine further comprises a stator (16) having one or more bearing surfaces (16a-d) corresponding to the one or more bearing surfaces (12a-d) of the shaft (12) and made of an engineering plastic. 16. A method for making a shaft (12) for a rotating machine (10), characterized by: making the shaft (12) substantially out of engineering plastic and including a portion ( 12a-d) having one or more surfaces (12a-d) serving as respective bearing surfaces and formed from the same engineering plastic as the rest of the shaft (12), wherein the shaft (12) includes one or more portions (12a-b) having respective surfaces serving as respective radial bearing surfaces and one or more portions (12c-d) having respective surfaces serving as respective thrust bearing surfaces, thereby integrating into the shaft (12) the functions of both a shaft structure and one or more bearing structures. 17. The method of claim 16, wherein the engineering plastic is a material including a selected polymer. 18. The shaft of claim 17, wherein the selected polymer is poly-ether-ether-ketone (PEEK). 19. The method of claim 17, wherein the selected polymer is polyimide. 20. A centrifugal pump (10), comprising a shaft ( 12), characterized in that: the shaft (12) is made substantially out of engineering plastic and includes a portion (12 a-d) having one or more surfaces (12a-d) serving as respective bearing surfaces and formed from the same engineering plastic as the rest of the shaft (12), the shaft (12) thereby integrating the functions of both a shaft structure and one or more bearing structures. 21. A method for making a centrifugal pump having a shaft ( 12), characterized by: making the shaft (12) substantially out of engineering plastic and including a portion (12a-d) having one or more surfaces (12a-d) serving as respective bearing surfaces and formed from the same engineering plastic as the rest of the shaft (12), thereby integrating into the shaft (12) the functions of both a shaft structure and one or more bearing structures.
이 특허에 인용된 특허 (10)
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Manfred Knabel DE; Edmund Schuller DE; Erich Bock DE, Bearing composition for a open-end spin rotor.
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Brger Herbert (Heidelberg DEX), Belt-driven water pump.
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Romanyszyn ; Jr. Michael T. (Springfield OH), Helical metering pump having different sized rotors.
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Wittkop Wolfram (Sprockhvel DEX) Samland Ulrich (Hattingen DEX), High-pressure water pump having a polyetheretherketone cylinder bushing for pure water.
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Oikawa Kunihiro (Hatoyama JA), Magnetically driven centrifugal pump.
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Oikawa Kunihiro (Niiza JA), Magnetically driven centrifugal pump and means providing cooling fluid flow.
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Gully James B., Method of improving centrifugal pump efficiency.
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Klaus ; Franz, Permanent magnetic centrifugal pump.
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Kevin R. Kirtley ; David B. Manner, Rotary vane pump with continuous carbon fiber reinforced polyetheretherketone (peek) vanes.
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Ono Sumio,JPX ; Yamashita Mikio,JPX ; Hayashi Eiji,JPX, Uniaxial eccentric screw pump having a flexible plastic shaft.
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Moore, Michael E.; Stuckey, Terry J.; Malhotra, Kawall; Floyd, Randall R.; Bandas, John S., Encapsulated outer stator isolated rotor stepper motor valve assembly.
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Griffin, Timothy R.; Gilarranz, Jose L., Method for on-line detection of liquid and potential for the occurrence of resistance to ground faults in active magnetic bearing systems.
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Gilarranz, Jose L.; Griffin, Timothy R., Method for on-line detection of resistance-to-ground faults in active magnetic bearing systems.
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Maier, Martin D.; Kidd, H. Allan, Segmented coast-down bearing for magnetic bearing systems.
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Maier, Martin D.; Kidd, H. Allan, Whirl inhibiting coast-down bearing for magnetic bearing systems.
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