Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S384/00—Bearings
  • Y10S384/90—Cooling or heating

Definitions

• the present invention relates to cylindrical bearing bearings for guiding a shaft and, more precisely an element of such a bearing including a ring allowing the relative perfect centering of the bearing and the shaft, as well as the method of centering at by means of such a level.
• bearings including oscillating bearings mounted on a ball joint.
• Such bearings have the disadvantage of being complex and costly.
• the object of the present invention is to obtain relative perfect centering of the shaft and of a bearing without the above-mentioned drawbacks resulting therefrom.
• each element of the bearing includes a centering ring made of a material whose coefficient of thermal expansion is greater than that of the shaft, and arranged / coaxially with the shaft inside the bearing, with clearance such that during appropriate cooling, the ring comes to hoop the shaft.
• the ring is arranged in the immediate vicinity of the bearing inside the bearing element and its internal diameter at room temperature is very slightly greater than that of the bearing.
• the ring constitutes the bearing of the bearing element.
• the material constituting the ring is preferably a polytetrafluoroethylene, the coefficient of thermal expansion of which is more than ten times greater than that of the steel constituting the shaft.
• other materials such as polyethylene: - ne, certain polyamides, polyvinylidene fluoride can also be favorably used.
• the cooling temperature is preferably between - 10 and - 30 ° C.
• the single figure shows in axial section a bearing element according to one of the embodiments of the invention.
• the shaft 1 is vertical.
• the bearing element comprises a body 2 defining a space in which a bearing 3 and a ring 4 are arranged with an appropriate clearance relative to the shaft 1.
• the bearing generally consists of several juxtaposed elements conforming to the element shown in the figure.
• the coefficient of thermal expansion of the material constituting this ring 4 is much greater than that of the material constituting the shaft.
• the ring may be favorably formed by polytetrafluoroethylene whose
• the ring does not constitute the bearing itself of the bearing, but for certain applications, it may be preferable that the ring constitutes the bearing directly.
• the ring 4 is placed in the immediate vicinity of the bearing 3 inside the body 2 of the bearing, and its internal diameter at room temperature is very slightly greater than that of the bearing 3.
• the shaft diameter being 60.0 mm
• the inner diameter of the bearing is 60.2 mm while the inner diameter of the ring is 60.3 mm at room temperature.
• the ring 4 relaxes and the position of the bearing is perfectly adjusted. According to the example previously indicated, a difference of approximately 45 ° C with respect to the ambient temperature is sufficient to obtain the desired result. As a result, the temperature to which the bearing is cooled is favorably between - 10 and - 30 ° C depending on the ambient temperature.
• Such a method makes it possible to obtain a perfect alignment of several juxtaposed bearing elements around the same shaft when no defect in coaxiality is tolerated, which is generally the case for centrifugal pumps.
• I1 is possible to fix in advance in position the lower bearing element and ensure the alignment-ment of the other elements of the same bearing using the method described above.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Support Of The Bearing (AREA)
• Mounting Of Bearings Or Others (AREA)
• Rotary Pumps (AREA)
• Applications Or Details Of Rotary Compressors (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=9238705

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (2)

Citations (2)

Family Cites Families (8)

• 1980
  • 1980-02-19 FR FR8003550A patent/FR2476252A1/fr active Granted
• 1981
  • 1981-02-18 JP JP56500722A patent/JPS57500123A/ja active Pending
  • 1981-02-18 US US06/310,536 patent/US4466752A/en not_active Expired - Fee Related
  • 1981-02-18 BE BE1/10142A patent/BE887558A/fr not_active IP Right Cessation
  • 1981-02-18 WO PCT/FR1981/000020 patent/WO1981002451A1/fr active Application Filing
  • 1981-02-18 GB GB8131336A patent/GB2082268B/en not_active Expired
  • 1981-02-18 DE DE813136062A patent/DE3136062A1/de active Granted

Patent Citations (2)

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