. American engineer and railroad journal . , and this difference when adjusted is made to sustainthe weight of the shaft m and all of its connected parts, weigh-ing from 800 to 1,600 lbs. If the up thrust or balancing is notenough the impeller is taken out, and the ends of the bottomvanes trimmed off at n until an equilibrium is obtained. Thebottom vanes c are commonly one-third shorter than the topones e when the disks are 24 to 30 in. diameter, and it is sur-prising to see what an effect is produced by cutting off evenhalf an inch from the ends of the vanes at n. This method ofbalancing disk
. American engineer and railroad journal . , and this difference when adjusted is made to sustainthe weight of the shaft m and all of its connected parts, weigh-ing from 800 to 1,600 lbs. If the up thrust or balancing is notenough the impeller is taken out, and the ends of the bottomvanes trimmed off at n until an equilibrium is obtained. Thebottom vanes c are commonly one-third shorter than the topones e when the disks are 24 to 30 in. diameter, and it is sur-prising to see what an effect is produced by cutting off evenhalf an inch from the ends of the vanes at n. This method ofbalancing disk impellers for centrifugal pumps is also appliedto encased impellers, as in the case of pumps illustrated in , and is shown in its most complete form applied to a hori-zontal pump in fig. 2. It will be noticed there are vanes on both sides of the disk,those on the back being to set up there the same centrifugalaction and force that exists on the front or working side. Itwill also be noticed that the back or balancing vanes are a lit-.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
