B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
B02C 15/00 (2006.01)
Patent
CA 2325030
A scraper assembly (52) for use with an associated coal pulverizes (10) or as part of a coal pulverizes (10) having a vertical axis (16) with a central hub (61) that rotates during normal operation of the pulverizes (10). The scraper assembly (52) includes a bracket (54, 58, 60) dimensioned and configured for attachment to the hub (61) of the coal pulverizes (10) that rotates in the normal operation of the coal pulverizes (10). The apparatus (52) also includes a shaft (56) extending from the bracket (54, 58, 60). The shaft (56) is substantially horizontal and the apparatus (52) also includes a scraping element (72) pivotally mounted on the shaft (56). A torsion spring (76) biases the scraping element (72) with respect to the shaft (56). In some forms of the invention the scraping element (72) comprises a first (62) and second (64) journals engaging the shaft (56) at axially spaced points and the scraping element (72) further includes first (66) and second (68) arms extending radially away from the shaft (56) that are respectively fixed to the first (62) and second (64) journals. The apparatus (52) may further include a first plate shaped member (70) carried on the first (66) and second (68) arms and a second plate shaped member (72) removably attached to the first plate shaped member (70).
La présente invention concerne un ensemble de racloir (52) qui s'utilise conjointement avec un pulvérisateur de charbon< >(10) ou qui en fait partie intégrante et qui tourne sur l'axe vertical (16) d'un moyeu central (61) pendant la marche normale du pulvérisateur (10). L'ensemble de racloir (52) comprend un support (54, 58, 60) dimensionné et étudié pour se fixer sur le moyeu (61) du pulvérisateur (10) et qui tourne dans le sens de rotation normal de ce pulvérisateur. L'ensemble de racloir (52) comprend également un arbre (56) partant du support (54, 58, 60). L'arbre (56) est sensiblement horizontal et l'ensemble de racloir (52) comporte un élément racleur (72) monté pivotant sur l'arbre (56). Un ressort de torsion (76) force l'élément racleur (72) contre l'arbre (56). Dans certaines formes de l'invention, l'élément racleur (72) comporte un premier (62) et un second (64) paliers qui viennent s'ancrer sur l'arbre (56) en des points espacés axialement; par ailleurs, l'élément racleur (72) comprend un premier (66) et un second (68) bras disposés radialement de l'arbre (56) et qui sont fixés respectivement sur le premier (62) et le second (64) paliers. Enfin, l'ensemble de racloir (52) peut comprendre un premier élément (70) de forme plate supporté par les premier (66) et second (68) bras, et un second élément (72) de forme plate monté amovible sur le premier élément (70).
Prairie Robert S.
Przybycien Ronald P.
Abb Alstom Power Inc.
Alstom Technology Ltd
Smart & Biggar
LandOfFree
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