Mine drainage pump parts inspection standard

A, mine drainage pump, pump shaft

1, clean and check the pump shaft, pump shaft shall be no cracks, defects such as serious wear and tear. As for wear, cracks, erosion, etc. , should be detailed records, and analyzes its reason.

2, detection of pump shaft straightness, its value on the full length should not be greater than zero. 05mm。 Shaft neck surface no pitting, defects such as scab, the surface roughness of maximum allowable values of 0. 8 microns, shaft roundness and cylindricity error should be less than 0. 02mm。

3, keyway centerline of shaft centerline parallelism error should be less than 0. 3 mm / 100

1, mine drainage pump impeller, clean and inspect all levels of the surface of the impeller, the impeller surface should be no defects such as cracks, wear, impeller passage surface should be smooth, and no scaling, burr, blade should be no crack, scour thinning defects, etc. 2, check the impeller inlet and outlet sealing ring, at all levels should be no loose, sealing ring surface is smooth, no burr, surface roughness Ra of the maximum allowable values of 0. 8 microns, and impeller assembly clearance quantity should be 0. 05 ~ 0. 10 mm。 Based on wheel inner hole, radial runout check the impeller should be greater than zero. 05 mm。 Face runout is not greater than zero. 04 mm。 3, impeller and shaft USES the interference fit, generally for the H7 / h6. The key and keyway interference quantity of 0. 09 ~ 0. 12 mm, after assembly, button at the top of the interval is 0. 04 ~ 0. 07 mm。 4, the impeller must be static balance.

three, mine drainage pump pump head, pump casing and guide impeller

1, clean and check the impeller at all levels, should be no wear, cracks, erosion and other defects.

2, guide impeller of stop pin should be free of bent, broken and loose. head, pump shell sealing ring surface should be no pitting, scars, groove, the surface roughness Ra of the maximum allowable values of 0. 8 microns, sealing ring and the pump head, water pump casing assembly clearance volume of 0. 05 ~ 0. 10 mm, sealing ring should not loose.

3, to pump head, pump shell seam allowance as a benchmark, measuring ring within the aperture to the circular runout, its value is not greater than zero. 50 mm, face round should not be greater than zero. 04 mm。

4, measuring water pump head, pump casing interval between seal ring and its assembly sealing ring, its value should be zero. 50 ~ 0. Between 60 mm.

4, mine drainage pump throttle shaft seal

1, clean and check the throttle shaft seal surface, it should be no defects such as cracks, eccentric wear, surface roughness Ra of the maximum allowable values of 0. 8μm；

2, throttle shaft seal and pump body use H7 / p6 to cooperate. Outside the circle as a benchmark, measuring the aperture to the circular runout, its value should not be greater than zero. 02mm；

3, measure the throttle shaft seal and pump shaft clearance, its value should be zero. 25 ~ 0. Between 30 mm.

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