Company skills competition: CAD drawing, measuring the pump shaft of centrifugal pumps and creating drawings along with specifying all tolerance requirements
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I’m seeking help from everyone. Recently, the company organized a skills competition that involved taking a simple centrifugal pump shaft, measuring it, and creating a CAD drawing of it. I need to know what geometric and dimensional tolerances should be specified, how to choose them, and if there are any CAD drawings that can serve as references.
First, determine the fit between the components; then, based on that fit, the tolerance grade, and the diameter, select the shaft’s tolerance, and finally indicate it on the drawing.
Tolerances are specified for the areas where bearings, impellers, couplings, and mechanical seals are installed, along with requirements regarding surface roughness
What is the circular runout of a regular shaft?
These days, mechanical seals are installed on the shaft sleeves, so tolerances for the pump shafts aren’t considered anymore. As for roughness, what is the typical value for the shafts of our clean water pumps?
Regarding form and position tolerances, what is the circular runout of the pump shaft in small-scale Clear water pumps?
The machining shaft requires tolerances; does your shaft only fit with a sleeve? Incredible
This post was last edited by 3983596_FPPZ on 2020-8-6 at 14:56. Professional
Radial runout: 8 levels for single-stage pumps, 7 levels for multi-stage pumps; end face runout: 7 levels for single-stage pumps, 6 levels for multi-stage pumps； At the coupling: k6; at the bearing isolators: h9; at the bearings: js6; at the mechanical seals: h6; at the impeller: h6. The tolerance for bearings is 0.8, while for the other areas it is 1.6 in the radial direction and 6.3 on the end faces. Attention should be paid to the measurement of the entry angles ；