Coal Washery Plan
I assumed an engine speed of 250 RPM and modified the Crusher pulley Dia to get that RPM. From the text a single Jig requires about 10 HP and the entire unit with belts etc. about 20 HP per jig. The Crusher requires 45 HP at 100 RPM – so I assume that is the size engine I need. The Pulley Info below will be moved to their own page at some point .. this is a work in progress after all .. I am having fun massaging the numbers at the moment. Pump Drive Pulley 45 HP : From the ‘Belt Width Table‘ we can see that at 45 Hp the belt — b — needs to be 3-1/2″ wide and at 20 HP only 1-1/2″ wide. Pulley width — B — is taken as Running the calculations for where in the text it refers to the Stewart Washery having five jigs with 100 HP .. my ‘assumption’ is that the draftsman shows a single jig for simplicity while showing the engine and pulleys for the full five-jig Washery. 100 HP : This requires a 8″ wide belt or a 10″ wide pulley. This is well within the error of me trying to trace a small, blurry image. Since I am modeling a single-jig I am happy to go with the Jackshaft Drive Pulley
45 HP : From the ‘Belt Width Table‘ we can see that at 45 Hp the belt — b — needs to be 9″ wide and at 20 HP only 4″ wide. Pulley width — B — is taken as Once again, running calculations for a five-jig Stewart Washery at 100 HP 100 HP : This requires a 18″ wide belt or a 22.5″ wide pulley. This is (again) well within the error of me trying to trace a small, blurry image. Since I am modeling a single-jig I am happy to go with the |
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