SU1303756A1 - Magnetoelectric bearing - Google Patents

Abstract

This invention relates to instrumentation engineering, in particular to contactless support structures. The purpose of the invention is to expand the operational capabilities by using the magnetic flux of one magnet to control the shaft position in two directions — radial and axial. The magnetoelectric bearing contains an annular permanent magnet 1 mounted on a rotating shaft 2 coaxially with its axis. At the opposite poles of the annular permanent magnet there are magnetic conductors 3, 4 forming a cylindrical air gap between the surfaces facing each other, in which the annular The control winding 5 of the axial position S of the shaft 2 is fixed on the fixed part 6 of the bearing. In the magnetic conductor 3, a slot is formed, forming between its parts an axial air gap in which the active part of the winding 7 of the control of the radial position of the shaft 2 mounted on the fixed part 6 of the bearing is located. Non-magnetic sleeve 8 is fixed relative to each other part of the magnet-to-current 3. When current flows, the value and direction of which is determined by the control system, the winding sections 7 control the radial position of the shaft 2 and the annular winding 5 control the axial position of the shaft 2 interaction of the conductors with the current of the windings 5, 7, with the magnetic flux in the gap creates a force, the direction and magnitude of which depends on the direction and magnitude of the current. When an external force acts on the shaft 2, which displaces it from the unstable equilibrium position, the position sensors of the shaft 2 produce a signal which, entering the control system, determines the direction and magnitude of the current in the windings 5, 7 necessary to compensate for the external force. 4 or (C (L so otoel 05 ./

Description

This invention relates to instrumentation engineering, in particular to the construction of contactless supports.

The purpose of the invention is the expansion of operational capabilities.

Figure 1 shows a magnetoelectric bearing with an axially magnetised permanent magnet, the section in figure 2 shows a bearing with a control winding in the radial position on the inside diameter of the magnet and a radially magnetized permanent magnet, an option; a bearing with two permanent magnets; a variant in FIG. 4 is a winding circuit for controlling the radial position of the shaft.

The magnetoelectric bearing (FIG. 1) contains an annular permanent magnet 1 attached to the shaft and shaft 2 coaxially with its axis. Magnetic lines 3 and 4 are installed at the opposite poles of the ring permanent magnet 1, forming between the facing surfaces of a cylindrical air gap, in which the ring winding 5 controls the axial position of the shaft 2 and is fixed to the fixed part 6 of the bearing. In the magnetic conductor 3, a slot is formed, forming between its parts an axial air gap in which the active part of the winding 7 controlling the radial position of the shaft 2 is placed. mounted on the fixed part 6 of the bearing. The non-magnetic sleeve 8 is designed to fasten parts of the magnetic conduit 3.

FIG. 2 shows a bearing variant with an annular radially-magnetised permanent magnet 1 and a slot in which the active part of the control winding 7 arranged in the magnetic core 4 from the inside diameter of the annular permanent magnet 1 is placed.

In the version of the bearing with two permanent magnets (Fig. 3) the part of the magnetic core 3 placed between the magnets 1 and 9 is common to these permanent magnets. At the other pole of the permanent magnet 9 there is a magnetic conductor 10. Between the second part of the magnetic conductor 3 installed on the non-magnetic sleeve 8 of the magnet 9 and the magnetic conductor 10 in the gap there is a second ring winding 11 controlling the axial position of the shaft 2 ,, and in the magnetic conductor 3 from the magnet 9 made the second slot, forming an axial gap in which the second is installed

the winding 12 controls the radial position of the shaft 2.

FIG. 4 shows separately a diagram for performing the winding 7 for controlling the radial position of the shaft 2. The winding

contains, for example, four sections made in the form of sections of a ring with arcuate branches 13 and 14 and radial branches 15 and 16. The arched branches 13 are active and

placed in the gap between the parts of the magnetic circuit, separated by a slot, and the other arcuate branches 14 are placed outside the gap. The proposed device works as follows.

When current flows, the value and direction of which is determined by the control system, over sections of the control winding 7, the radial position of the shaft 2 and the annular winding 5

controlling the axial position of the shaft 2, the interaction of the conductors with the current of the windings 5 and 7 with the magnetic flux in the gap creates a force, the direction of which depends on the direction of the current, and its magnitude on the amount of current.

When an external force acts on the shaft 2, which displaces it from the unstable equilibrium position, the position sensors (not shown) of the shaft 2 produce a signal, which, entering the control system, determines the direction and magnitude of the current in the windings 5 and 7 needed to compensate

external force. For example, when the shaft 2 (Fig. 1) is moved up the signal from the position sensor, an increase in the current in the upper section of the winding 7 occurs, and the shaft 2 moves to its previous position.

The proposed magnetoelectric bearing has a large operational capability compared to the known one, since it uses magnetic flux from a single magnet to control the position of the shaft in two directions, radial and axial.

55

Claims (1)

Invention Formula Magnetoelectric bearing containing at least one col3 A fixed permanent magnet fixed coaxially on the rotating shaft, on the opposite poles of which magnetic cores are installed, forming a cylindrical air gap between the surfaces facing one another, in which the annular control winding of the axial position of the shaft is mounted on the fixed part of the bearing, position sensors The shaft and the control unit characterized in that, in order to expand the operational capabilities, the bearing is provided with an ob-037564 a coil of control of the radial position of the shaft, in one of the magnetic circuits of the annular permanent magnet a slot is formed, forming an axial air gap between the parts of the magnetic circuit, in which the indicated control winding of the radial position of the shaft, which is made in sections, is mounted on the fixed bearing. rings with arcuate and radial branches; one of the arcuate branches of each section is placed in the gap, and the other is out of it. FIG. 2 Fig.Z fj 15 fig a Editor L. Povhan Compiled by N. Trifonov Tehred L.Oleynik Proofreader A. Zimokosov Order 1289/36 Edition 760 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4