Bushing structure for using in magnetically driving centrifugal

Details Bushing structure for using in magnetically driving centrifugal Bushing structure for using in magnetically driving centrifugal

1991-12-24

1993-02-09

Vrablik, John J.

Pumps

Motor driven

Electric or magnetic motor

41742312, 417366, 415111, 384321, F04B 3906

Patent

active

051849453

ABSTRACT:
A centrifugal pump comprising a housing having an open end covered by a rear cover and a front cover, overlapping each other. A fixed central shaft is disposed along a central rotation axis of the centrifugal pump with a driven magnet member disposed therearound to rotate with respect thereto. The driven member is enclosed by an enclosure which is an extension of an impeller disposed within an interior space defined between the rear and front covers. The driven member is driven by a driving magnet member in fluid isolation from the driven member. The driving member is mechanically connected to a motor and actuated thereby. A bushing with internal and external cooling grooves formed thereon is provided between the fixed shaft and the driven member enclosure and a fluid passage is defined along the enclosure to conduct the pumped fluid to the cooling grooves of the bushing and to force the fluid flowing therethrough and then circulating back to the impeller so as to dissipate heat generated between the fixed shaft and the bushing. A resilient V-shaped cross section ring is provided on both ends of the bushing to absorb thrust generated by the bushing during the operation of the centrifugal pump.

REFERENCES:
patent: 3933416 (1976-01-01), Donelian
patent: 4013384 (1977-03-01), Oikawa
patent: 4047847 (1977-09-01), Oikawa
patent: 4115038 (1978-09-01), Litzenberg
patent: 4577797 (1986-03-01), Martin
patent: 4812108 (1989-03-01), Kotera
patent: 4850818 (1989-07-01), Kotera

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