Gear speed increasing assembly type high speed rotating casing pump unit

Abstract

The invention relates to a high speed rotating casing pump unit, in particular to a rotating casing pump unit composed of a gear speed increasing assembly type high speed rotating casing pump. The pump unit comprises the gear speed increasing assembly type high speed rotating casing pump, an integrated shaft head oil pump, a coupler and a driving motor. The coupler enables the driving motor to be connected with a low speed shaft of the gear speed increasing assembly type high speed rotating casing pump. The gear speed increasing assembly type high speed rotating casing pump is composed of a stator part, a rotor part and a box body part. The stator part is composed of two rotating casing pump suction / discharging parts, a protection casing of the stator part is connected onto a location flange of the box body part, and a shaft seal part is located on the inlet side of each suction part. The rotor part is composed of a high speed shaft system and a low speed shaft system and adopts a single-oblique-tooth gear pair, each rotating casing pump rotor is directly connected with the high speed shaft, and double-side thrust discs for balancing residual axial force are arranged on two sides of the small gear tooth width direction of the high speed shaft to meet the alternating axial load work condition. The high speed rotating casing pump unit is compact in appearance, small in axial force borne by the bearing, large in pump unit flow application range and good in anti-cavitation performance.

Description

technical field [0001] The invention belongs to the technical field of rotary casing pumps, in particular to a gear speed-increasing assembled high-speed rotary casing pump unit, which is suitable for low-flow and ultra-high-lift working conditions in the petrochemical and oil refining fields, and is also suitable for low-flow, ultra-high-lift pumps in the nuclear power field. High stress conditions. Background technique [0002] The root of the low efficiency of small flow and high head centrifugal pumps is that the disc friction loss of the impeller is too large. This loss is proportional to the 5th power of the impeller diameter and the 3rd power of the speed. To compare the efficiency of centrifugal pumps, a breakthrough must be made in pump theory. For this reason, the American Kobe Company proposed a brand-new idea, which combined the impeller and the pump casing to rotate synchronously, and the disk friction loss in the process of liquid gaining kinetic energy was al...

AI Technical Summary

Problems solved by technology

[0007] Most of the high-power rotary casing pump units at home and abroad adopt the traditional mode of the rotary casing pump with an external speed-increasing high-speed gearbox, which requires two sets of diaphragm couplings. The overall layout of the equipment is loose and not compact, and the bearing consumes a lot of power and occupies a large area ,high cost

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