RU2271597C1 - Cylindrical induction pump - Google Patents

Abstract

FIELD: cylindrical induction pumps.

SUBSTANCE: proposed cylindrical induction pump that provides for exerting electromagnetic force on liquid-metal coolant of process channels has housing accommodating pressurized external inductor with winding and magnetic circuit, pressurized internal inductor with winding and magnetic circuit, and two process channels formed by installing intermediate circular magnetic circuit between external and internal inductors.

EFFECT: enhanced power characteristics inherent to double-winding pumps, reduced size and metal input compared with single-channel pumps of same delivery.

1 cl, 2 dwg

Description

The field of technology.

The invention relates to devices that provide electromagnetic force on a liquid metal, which are widely used in various sectors of the economy, for example in nuclear energy.

The prior art.

A known design of a double-winding pump (G.A. Baranov and others. "Calculation and design of induction MHD machines with a liquid metal working fluid", Fig.2.3), used for pumping a liquid metal coolant through pipelines, consisting of a core composed of sixteen packages of longitudinally laden electrical steel with an internal winding located in it; case with an external winding and sixteen packages of the magnetic circuit and the working channel formed by concentrically arranged core shell and shell of the housing. To cool the windings, a coolant supply is provided.

The disadvantage of this solution is the large diameter of the working channel, and, consequently, the casing in the case of a pump capacity of more than 300 m ³ / h. This is due to the fact that there is an optimal design speed of the liquid metal coolant in the working channel, due to erosion-corrosion effect on the shell material, and the height of the working channel cannot be more than 20-25 mm in order to avoid vortex back flows.

For high-capacity pumps, 500-1000 m ³ / h, the diameter of the casing unreasonably increases, and at the same time, the core (rotor) is underloaded by magnetic flux.

In addition, the disadvantage of this pump design is the leakage of the external inductor, i.e. the inability to use this pump in a submersible version.

The closest technical solution of the known is an electromagnetic pump according to US patent No. 4166714.

Disclosure of the invention.

The aim of the present invention is to provide a submersible double-winding pump of high capacity with a reduced diameter of the housing.

The objective of the invention is to create in the flow part of the pump two working channels.

The technical result of the invention is to reduce the size, metal consumption compared to a single-channel pump of the same capacity.

This is achieved by the fact that the pump has two sealed inductors, each of which has its own winding. The design of the pump provides for the installation between the external inductor and the internal inductor of a sealed annular intermediate magnetic circuit, consisting of packages of longitudinally-charged electrical steel, lined with stainless steel sheet. As a result, two working channels are formed, through which the liquid metal coolant flows.

A brief description of the drawings.

The invention is illustrated by drawings, which represent the following:

Figure 1 is a longitudinal section of a pump;

Figure 2 - section aa.

Figure 1 shows a cylindrical induction pump, consisting of a sealed housing 1, an external inductor, including a winding 2 and a magnetic circuit 3, and a compensation unit 4; an internal sealed inductor, including a winding 5 and a magnetic circuit 6, consisting of a set of split washers of electrical steel and an internal sealed core, recruited from longitudinal packages of electrical steel, an annular two-layer sealed intermediate magnetic circuit 7, spacers 8, movable bearings 9, 10, working channels 11, 12, formed by thin-walled shells 13, 14, compound 15 and pressure inputs 16.

Figure 2 shows the magnetic circuit 3 of the external inductor, the magnetic circuit 6 of the internal sealed inductor, the annular sealed intermediate magnetic circuit 7.

The implementation of the invention.

Induction cylindrical pump operates as follows. A three-phase alternating voltage is supplied to the external and internal windings. The alternating current flowing through the windings creates a total time-varying magnetic field, which, closing on the intermediate magnetic circuit, induces a current in the liquid metal coolant of both working channels.

The induced electric current, interacting with the magnetic field of the inductors, creates a force that causes the liquid metal coolant to move in each working channel.

The heat released in the magnetic cores, windings is removed to the coolant located inside and outside the pump.

Information sources

1. G. A. Baranov and others. "Calculation and design of induction MHD machines with a liquid metal working fluid." M .: Atomizdat, 1978, Fig. 2.3.

2. The electromagnetic pump. IPC N 02 N 4/20, NKI 417-50. U.S. Patent No. 4,167,714. Priority 08/20/1976. Publication 09/04/1979.

Claims (1)

An induction cylindrical pump, comprising a sealed housing with an external inductor enclosed in it with a winding and a magnetic circuit, a thin-walled shell of the working channel with a compensation unit, an internal sealed inductor consisting of a winding and a magnetic circuit, assembled from split washers of transverse-charged electrical steel and an internal sealed core, characterized in that between the external and internal inductors mounted and fixed ring sealed two-layer intermediate magnetic circuit, consisting s of the packages longitudinally laminated electrical steel sheet lined with stainless steel and forming two working channel.

Images