Sections-distributed-in-pairs twin-volute mine wearable multi-stage pump

Abstract

The invention relates to a sections-distributed-in-pairs twin-volute mine wearable multi-stage pump suitable for conveying sewage with different granules and concentrations in a mine. The sections-distributed-in-pairs twin-volute mine wearable multi-stage pump is characterized in that an effluent stage of the pump is arranged in the middle of the pump, and impeller assemblies at both sides are oppositely arranged, and a final-stage impeller and the middle segment of a final-stage double volute are oppositely arranged. When the pump is provided with an oven number of stages, the impeller assemblies at both sides are symmetrically arranged. When the pump is provided with an odd number of stages, the front impeller assembly is provided with one more pulley. The sections-distributed-in-pairs twin-volute mine wearable multi-stage pump is innovated and improved in the aspects in axial force balance of the pump, the over-current piece and the clearance sealing life of the pump, the diluted oil lubrication of the bearing, circular cooling by utilizing shaft seal leakage, and the like. Accordingly, in the service life of the pump, the axial force of the pump is basically balanced, and residential axial force is borne by angular contact bearings in pair at the back of the pump which keeps long-term high-efficiency operation, and the fault-free working time and the overhaul-period average life of the pump are greatly improved.

Description

technical field [0001] The invention belongs to mechanical general products and pumps, in particular to a wear-resistant multi-stage mine pump with double volute casings opposed to each other. Background technique [0002] At present, the main drainage pumps widely used in mines in my country are D-type and MD-type multi-stage centrifugal pumps, and a small amount of DA-type and other types of multi-stage pumps are used. D-type pumps are the replacement products of DA-type pumps, and their structure is segmental. Figure 5 , the impellers (1) at all levels are arranged in the same direction in sequence, the pressure water chambers (2) at all levels are of the radial guide vane type, and the axial force of the pump is dynamically balanced by a balance plate mechanism (3). D-type pumps are multi-stage pumps designed according to clean water conditions. According to the quality classification regulations of the pump industry, the first overhaul time is more than 8000 hours for q...

AI Technical Summary

Problems solved by technology

However, when the pump is used in the mine to transport sewage with a certain concentration of solid particles, the life of the radial guide vane is shorter than that of the volute. In addition, the slender discharge pipe, the throttle valve for regulation or the orifice plate with small aperture are more likely to block the pipeline, making the Axial force balance failure

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