RU2629004C2 - Uzyakov's stator magnetic coupling - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: stator magnetic coupling comprises of two identical half-couplings with permanent magnets, mounted thereon and having a number of pole pairs p (where p=1, 2, …, n), and a fixed stator consisting of separate magnetic circuits arranged along the circumference, the number of which is z=2(p+kp/2) (where k=1, 2, …, n). The magnetic circuits are united by a stator casing made of non-magnetic metal. The stator passes through a screen separating the cavities of the drive and driven shafts. There are work parts of the stator, protruding on both sides of the screen, which interact with the half-couplings. There is an air gap between the half-couplings and the stator. The magnetic flux, generated by the permanent magnets of the half-couplings, is closed through the multi-element ferromagnetic stator circuit. Rotation of any of the half-couplings results in the occurrence of a rotating magnetic field in the stator, which drives the second half-coupling.

EFFECT: high specific characteristics with a significant thickness of the separating screen, providing a high differential pressure and radiation safety.

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Description

The invention relates to mechanical engineering and electrical engineering, it can be used to transfer energy with a tight separation of the cavities of the drive and driven shafts.

There is a wide variety of magnetic couplings for energy transfer with a tight separation of the cavities of the driving and driven shafts (see, for example, Ganzburg LB, Fedotov AI Design of electromagnetic and magnetic mechanisms. Reference book. L .: Engineering. 1980).

A common disadvantage of the known devices is that the screen separating the cavities of the drive and driven shafts cannot have a significant thickness, since this reduces the magnetic adhesion and coupling efficiency.

The closest in technical essence to the proposed invention (prototype) is an electromagnetic clutch-reducer having a fixed screen in the form of a housing made of insulating material with integrated ferromagnetic elements, containing a driving link in the form of an electromagnet with one or more pairs of poles located in the cylindrical cavity of the fixed screen , and the driven link is a ferromagnetic anchor having two teeth located in the inner cavity of the screen (see the description of the invention to patent RU No. 2451382 of 20. 05.2012).

The disadvantage of this device is its volatility, design complexity and low strength of electrical insulation materials.

The objective of the invention is to provide the possibility of energy transfer with a tight separation of the cavities of the drive and driven shafts with a significant (more than 20 mm) thickness of the separating screen, providing a high pressure difference and radiation safety.

The problem is solved in that the Uzyakov stator magnetic coupling contains two identical coupling halves 1 and 2 with permanent magnets 3 and 4 mounted on them, having the number of pole pairs p (where p = 1, 2, ... n) and a fixed stator consisting of separate magnetic circuits 7 arranged in a circle, the number of which z = 2 (p + kp / 2) (where k = 1, 2, ... n). Magnetic cores, which can be made of burnt electrical steel, are connected by a stator housing 8 made of non-magnetic metal (austenitic stainless steel, aluminum alloy, etc.). The stator passes through a screen 9 separating the cavities of the driving and driven shafts, on both sides of the screen 9 the working parts of the stator protrude, with which the coupling halves interact. Between the coupling halves and the stator there is a main air gap of the smallest possible size. The gap between the stator elements is at least ten times larger than the main air gap. The magnetic flux generated by the permanent magnets of the coupling halves is closed through a multi-element ferromagnetic magnetic circuit of the stator.

The invention is illustrated by drawings, where in FIG. 1 is a schematic diagram of a stator magnetic coupling Uzyakova, execution - 1, in FIG. 2 - the same coupling, execution - 2.

Presented in FIG. 1 and FIG. 2, the scheme of the invention consists of the following main elements: coupling halves 1 and 2, coupling shafts 5 and 6, permanent magnets 3 and 4, stator magnetic circuits 7, stator housing 8, screen 9 separating the cavities of the driving and driven shafts.

The stator magnetic coupling Uzyakova works as follows. The rotation of any of the coupling halves leads to the appearance of a rotating magnetic field in the stator. In this case, the second coupling half synchronously rotates so that the angle of mismatch between its magnetic poles and the magnetic field of the stator is minimal. In the presence of a moment of resistance, there is a mismatch of the axes of the magnetic poles of the coupling halves and the magnetic field of the stator, a change in the magnetic conductivity of the air gaps and a redistribution of magnetic fluxes in them, resulting in tangential forces that tend to reduce the angle of mismatch. The resulting moment of tangential forces in the air gaps of the coupling halves of the invention is similar to the moment of a magnetic, cylindrical, active, alternating-pole coupling with magnets of rare-earth metals (rare-earth metals).

Claims (1)

A stator magnetic coupling containing two identical half-couplings with permanent magnets mounted on them, having the number of pole pairs p (where p = 1, 2, ... n), characterized in that it has a fixed stator consisting of separate magnetic circuits arranged in a circle, the number which z = 2 (p + kr / 2) (where k = 1, 2, ... n), and the coupling half coupling does not occur directly between each other, but through the stator.

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