High-speed centrifugal pump with self-circulation system for conveying medium

Abstract

The invention discloses a high-speed centrifugal pump with a self-circulation system for a conveying medium. The high-speed centrifugal pump comprises an inducing wheel (1), a centrifugal impeller (2), a pump shell (3), a rear opening ring (4), a general flat key (6), a bearing (7), an oil inlet pipe (8), a bearing chamber (9), an injection ring (10), a spline (11), a mechanical sealing assembly (12), a throttle ring (15), a shaft (16) and an oil return pipe (17), wherein the inducing wheel (1) is connected with the shaft (16) through a shaft-end thread, and the centrifugal impeller (2) is connected with the shaft (16) through the general flat key (6), so that a rotor component is formed; the pump shell (3) is connected with the bearing chamber (9) through a cylinder-head hexagon socket screw (5); the mechanical sealing assembly (12) is connected with the bearing chamber (9); and the self-circulation system for the conveying medium is composed of the pump shell (3), the rear opening ring (4), the oil inlet pipe (8), the bearing chamber (9), the mechanical sealing assembly (12), the oil return pipe (17) and a pump inlet.

Description

technical field [0001] The present invention relates to a high-speed pump, in particular to a high-speed pump that realizes flushing, cooling of bearings and mechanical seals by means of a self-circulation system of the pump conveying medium, and simultaneously realizes axial force balance of the pump rotor under full working conditions. Background technique [0002] High-speed pumps are mostly used in petrochemical, aerospace and other fields. They are suitable for small flow and high-lift conditions. High-speed pumps have a high speed (up to 30,000rpm), so cavitation requirements are difficult to meet; traditional high-speed pumps have a single design and cannot meet Multi-working condition operation. When balancing the axial force, the traditional high-speed pump's balancing method is complex, resulting in a complex and bulky pump body structure; at the same time, it is difficult to realize the cooling and flushing of the mechanical seal. Contents of the invention [0...

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Problems solved by technology

[0002] High-speed pumps are mostly used in petrochemical, aerospace and other fields. They are suitable for small flow and high-lift conditions. High-speed pumps have a high speed (up to 30,000rpm), so it is difficult to meet cavitation requirements; traditional high-speed pumps are designed for single conditions and cannot meet Multiple operating conditions

When balancing the axial force, the balance method of the traditional high-speed pump is complex in structure, resulting in a complex and bulky pump body structure; at the same time, it is difficult to realize the cooling and flushing of the mechanical seal

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