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AssigneeThe Babcock & Wilcox Company
InventorsWilliam N. Martin, Ronald D. Mizak
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A pulverizer mounted on a foundation and comprising a housing enclosing a pulverizing zone and a base plate attached to the housing. The pulverizing zone includes a horizontally disposed rotatable grinding ring, rolling grinding balls positioned on the grinding ring, and means for rotating the grinding ring including an upright main shaft. An annular yoke is attached to the main shaft, and has an outer peripheral portion which is disposed superjacent to the base plate and supports the grinding ring. A load carrying member or thrust bearing is sandwiched between the base plate and the outer peripheral portion of the yoke to minimize the impact, shock, and eccentric loads that are transmitted from the coal grinding process to the main shaft. The load carrying member or thrust bearing achieves this by transmitting the vertical loads directly through the base plate to the housing and therethrough to the pulverizer foundation.
An assembly comprising an upright rotatable shaft extending into a rotatable yoke, a tubular bushing interposed between the shaft and the yoke, a base plate, an outer peripheral portion of the yoke facing the base plate, and a load carrying member sandwiched between the outer peripheral portion of the yoke and the base plate.
A pulverizer comprising a housing enclosing a pulverizing zone, a base plate attached to the housing, the pulverizing zone including a horizontally disposed rotatable grinding ring, rolling grinding elements positioned on the grinding ring, means for rotating the grinding ring including an upright main shaft, an annular yoke mounted on the main shaft, the yoke having an outer peripheral portion disposed superjacent the base plate and supporting the grinding ring, a load carrying member sandwiched between the outer peripheral portion of the yoke and the base plate, and a seal assembly for isolating the load carrying member from the pulverizing zone.
A method of retrofitting a pulverizer having a housing enclosing a pulverizing zone, a base plate attached to the housing, a horizontally disposed rotatable grinding ring located in the pulverizing zone, rolling grinding elements positioned on the grinding ring, an upright main shaft for rotating the grinding ring, the main shaft having a tapered end, an annular yoke mounted on the tapered end of the main shaft, the yoke having an outer peripheral portion disposed superjacent the base plate and supporting the grinding ring, a tubular bushing interposed between the yoke and the tapered end of the main shaft, the bushing having a tapered inner periphery facing the shaft, comprising the step of:
Dependencies are inferred from the claim text.