The clearance value of each connection during the maintenance of the magnetic vortex pump

Maintenance positions and maintenance methods of various gaps of magnetic vortex pumps: When regularly inspecting the axial gap between the impeller and the cover plates on both sides, the standard value is generally 2au003d0.17～0.20mm, and the lead wire method should be used for testing. Standard measurement; when detecting the radial clearance between the impeller and the pump casing, a feeler gauge should be used for measurement. The general standard value is cu003d0.15～0.20mm in the radial direction; when measuring the bearing clearance distance, a feeler gauge or It is a vernier caliper to operate, the general value is bu003d0.10mm; when measuring the assembly gap of the coupling with a vernier caliper or a depth sounder, the numerical specification is generally iu003d1mm, du003d4±0.5mm; the fit of the impeller and the key The fit between the impeller and the shaft is a sliding fit, the gap between the top of the key should be greater than or equal to 0.20mm, and the gap between the two measurements should be 0.01～0.04mm. Here is a calculation formula: Hu003dφu2/2g, Qu003dcF, where u Indicates the circumferential speed of the impeller, φ is a coefficient, the value is 3.5 ~ 4.5, F is the cross-sectional area of u200bu200bthe channel, C represents the liquid flow velocity in the channel, approximately c u003d u/2 or (0.55 ~ 0.65) u. The impeller blades are generally 24 to 60 pieces. Compared with the centrifugal pump, the characteristic curve of the vortex pump is similar but different. The curve of the vortex pump is steeper. The magnetic vortex pump has a small flow rate and a large pressure head, but the efficiency is not high. Therefore, the gap between the impeller and the cover of the vortex water pump The gap cannot be too large, otherwise the efficiency will be greatly reduced, so this kind of water pump is more suitable for transporting relatively pure liquids. u003c/pu003e
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