A dual-thrust ultra-high pressure boiler feed water pump

Abstract

The invention belongs to the technical field of boiler feedwater pumps, and in particular relates to a double-thrust ultra-high pressure boiler feedwater pump. The feature of the present invention is that: the thrust bearing assembly includes a housing, the housing is provided with an end cover corresponding to the right end of the pump shaft, the right end of the pump shaft is fixedly provided with a first thrust bearing disc, and the end cover is in line with the pump shaft. The electromagnet corresponding to the first thrust bearing disc; the second thrust bearing disc is arranged on the left side of the first thrust bearing disc on the pump shaft, and the thrust bearing is arranged on the right side of the second thrust bearing disc in the casing a seat; a thrust bearing block is arranged on the left side of the second thrust bearing plate in the casing; a sliding bearing matched with the pump shaft is arranged on the left side of the thrust bearing block in the casing. The invention has stable operation, long service life and convenient maintenance.

Description

technical field [0001] The invention belongs to the technical field of boiler feed water pumps, and in particular relates to a double-thrust ultra-high pressure boiler feed water pump. Background technique [0002] Boiler feed water pumps are mainly horizontal multi-stage and centrifugal structures. In the working condition of head 2000m and above, double-hull, core-pulling structure is usually adopted. The suction flange, cylinder body and outlet flange are welded together to form the pump cylinder part. The impellers are mounted on the pump shaft step by step in series, and are combined with balance discs, balance bushings, impeller snap rings and other parts to form rotor components. [0003] The structure of the rotor components directly affects the operation stability of the pump, among which the strength and rigidity of the shaft are the most critical. In order to axially fix the first-stage impeller, the first-stage impeller of the traditional feedwater pump is gen...

AI Technical Summary

Problems solved by technology

In the later maintenance and long-term use, the seam and sealing groove on the rear side of the suction box may be worn, which will affect the positioning accuracy of the core pack and the pump cylinder parts, thereby affecting the running clearance of the rotor parts and causing failures

The boss of the final guide vane and the groove of the large end cover are subjected to radial and axial positioning, and the accuracy and dimension requirements are strict. In actual assembly and maintenance, if there is wear, it will also affect the positioning accuracy of the core package

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