Key Points for Installation and Maintenance of Mine Pump Components

The installation and maintenance of mine pump components directly affect equipment service life and the continuity of mine production, requiring precise operations tailored to high-wear and high-corrosion working conditions.

Before installation, it is necessary to check the models of components such as impellers and pump casings, inspect for cracks or casting defects, and measure the gap between the impeller and pump casing (usually 0.5-1.5mm for slurry pumps). The foundation must be cast with concrete of C20 or higher strength, with thickness calculated based on the pump weight. The levelness error should not exceed 0.1mm/m, and a maintenance space 1.5 times the pump length should be reserved.

Core installation requires strict precision control: the alignment deviation between the pump shaft and motor shaft should be ≤0.05mm radially and ≤0.02mm/m axially, calibrated with a dial indicator; the diameter of the suction pipe should not be smaller than the pump inlet diameter, with the horizontal section inclined toward the pump at a ratio of 1:100 to reduce elbows; the outlet should be equipped with a flexible joint and pressure gauge. For seal installation, mechanical seals must ensure flat contact surfaces, while packing seals should have layered packing staggered at 90°, with gland tightness adjusted to allow 30-60 drops per minute. Before trial operation, manually rotate the pump to check for jamming, confirm the impeller rotation direction, and fill the pump with medium to exhaust air.

Daily maintenance involves inspecting pressure, current, temperature, leaks, and vibrations every shift. Periodic maintenance includes weekly cleaning of impeller entanglements, measuring wear (replacement required if exceeding 5% of the original diameter), replacing lubricating grease every 2000 hours, and timely replacement of bearings when clearance exceeds 0.1mm.

For common faults: insufficient flow is often caused by impeller wear or air leakage in the suction pipe, requiring impeller replacement or pipe sealing; overheating bearings may result from poor lubrication or misalignment, needing grease replenishment or realignment; severe vibration is usually due to impeller imbalance, requiring dynamic balance adjustment. Through precise installation and regular maintenance, failure rates can be significantly reduced, and pump component service life extended.