Magnetic reducer

FIELD: electric engineering.

SUBSTANCE: invention is related to electric engineering, to electromagnet mechanisms, and more specifically, to contactless magnetic reducers, and may be used as transmission device in mechanical systems with high resource of operation under impact loads. Magnetic reducer has rotor of fast rotation with permanent magnets (1), magnetised tangentially, wedge-like pole tips (2) with convex profiled surfaces inverted to working gap, non-magnetic bush (3) for fitting onto shaft of fast rotation (4). Magnetic core (5) with evenly installed teeth inverted to working gap, is fixed to body (6), with which hollow cylinders (7) are mechanically connected by non-magnet ring (10), which have alternating ferromagnetic and non-magnet elements. Rotor of slow rotation represents hollow cylinders (8) mechanically connected to shaft of slow rotation (9) by means of non-magnet disk (11) and has alternating ferromagnetic and non-magnet elements. Due to introduction of hollow cylinders of stator and rotor of slow rotation, magnetic reducer is produced with high transmission torque from alternating ferromagnetic and non-magnetic elements.

EFFECT: improvement of mass and dimensional parameters.

3 dwg

 

The invention relates to electromagnetic mechanisms, and particularly to a contactless magnetic gears, and can be used as transfer devices in mechanical systems with a long service life under shock loads.

The known magnetic gear having driving and driven shafts mounted on the control shaft leading element made in the form of a multipolar permanent magnet, located concentric with him annular element of a nonmagnetic material with a through radial slots filled with conductive material, and covering the last gear element (patent RU №2082042, F16H 1/06, publ. 1997.06.20) - [1].

Its disadvantage is the small moment passed.

Closest to the proposed invention to the technical essence and the achieved effect is a magnetic gear with the rotor rapid rotation of permanent magnet rotor slow rotation in the form of a hollow cylinder and the stator magnetic circuit and with teeth on its inner surface (Ed. mon. No. 280142, NC 51/00) - [2].

Its disadvantage is a relatively small moment passed.

The technical result, which directed the claimed invention, is to improve the mass and size parameters, i.e. an increase in transmit power given a courier envelope the Ah gear.

The technical result is achieved that the magnetic gearbox with the rotor rapid rotation of the permanent magnet, the rotor slow rotation in the form of a hollow cylinder and the stator magnetic circuit and with teeth on its inner surface, introduced hollow cylinders, in turn mechanically connected to a rotor of slow rotation and the stator, the rotor rapid rotation includes permanent magnets, magnetized tangentially and counter, and a wedge-shaped pole pieces, hollow cylinders are alternating ferromagnetic and nonmagnetic elements parallel to the axis of rotation, the angular sizes of all teeth and ferromagnetic elements are hollow cylinders are the same, the magnetic elements are hollow cylinders associated with the stator, have angular position coinciding with the angular position of the teeth of the magnetic circuit of the stator, and the number of ferromagnetic elements are hollow cylinders, which are connected with the stator and rotor slow rotation, differ within one pole of the dividing unit.

The essence of the claimed invention is illustrated by drawings, where:

Figure 1 - cross section of the magnetic gearbox;

Figure 2 is a longitudinal section of the magnetic gearbox;

Figure 3 - wave magnetic induction and scan hollow cylinders.

Here: 1 - permanent magnets, 2 - wedge-shaped pole pieces, 3 - dumb the magnetic sleeve, 4 - shaft fast rotating, 5 - magnetic circuit of the stator teeth, 6 housing 7 is a hollow cylinder stator 8 is hollow cylinders of the rotor slow rotation, 9 - slow shaft rotation, 10 - non-magnetic ring, 11 - non-magnetic disk.

The rotor rapid rotation has a rectangular vysokokoertsitivnye permanent magnets 1 (for example, samarium-cobalt or alloy Neodym-iron-boron), magnetized tangentially, wedge-shaped pole pieces 2 with a convex shaped surfaces facing to the working gap, and a non-magnetic sleeve 3 to fit on the shaft fast rotating 4.

The stator has an annular laminated magnetic core 5 with evenly spaced teeth facing to the working gap, and fixed to the body 6, which mechanically bonded non-magnetic ring 10 hollow cylinder 7, having alternating ferromagnetic and non-magnetic elements. The rotor slow rotation is a hollow cylinder 8 which is mechanically associated with the shaft slow rotation 9 non-magnetic disk 11 and having alternating ferromagnetic and non-magnetic elements.

The angular sizes of all teeth and ferromagnetic elements are hollow cylinders are the same. Magnetic elements are hollow cylinders, which are connected with the stator, have angular position coinciding with the angular position of the teeth of the magnetic circuit of the stator. The number of ferrom gnity elements are hollow cylinders, associated with the stator and rotor slow rotation, differ within one pole of the dividing unit.

A magnetic gear operates as follows. The permanent magnet 1 of the rotor rapid rotation and pole pieces 2 create in the working gaps sinusoidally distributed magnetic induction. The first maximum value of the magnetic induction is achieved in the middle of the pole pieces. In the working clearances in front of the means of permanent magnets of the radial component of the magnetic induction is zero.

When the rotor rotation fast rotation speed ω1wave magnetic induction rotates with the same angular velocity. When this hollow cylinders associated with the rotor slow rotation, in the absence of load torque will occupy a position in which in the zone of maximum magnetic induction module ferromagnetic elements are hollow cylinders 8 occupy an angular position coinciding with the angular position of the hollow cylinder 7 and the teeth on the magnetic circuit of the stator 5. In the zone of neutrals ferromagnetic elements are hollow cylinders 8 are located opposite the non-magnetic elements are hollow cylinders 7 and the slots of the magnetic core 5.

When the rotation of the rotor rapid rotation on one pole division of the slow rotor rotation will turn on one subzone division. The ratio Magnitogorskaya equal to the number of ferromagnetic elements are hollow cylinders of the rotor slow rotation, per one pole division.

Figure 3 shows wave magnetic induction B(β) and the reamer bushings. The teeth of the magnetic circuit of the stator 5 and the ferromagnetic elements of the hollow cylinder 7 is stationary. In the zone of maximum amplitude of the magnetic induction all ferromagnetic elements and the teeth are located against each other.

In areas of neutrals, corresponding to the midpoints of the magnets 1, the ferromagnetic elements are hollow cylinders 8, associated with the rotor slow rotation, are located opposite the non-magnetic elements of the hollow cylinder 7 and opposite the slots in the magnetic core 5. When the rotor rapid rotation will turn on one pole division, the poles N and S will be swapped, and the hollow cylinder 8 rotates through one ferromagnetic element (subzone division). Figure 3 shows the case when the gear ratio is 8, i.e. the rotor slow rotation rotates at a speed

ω21/8.

Time passed on the slow shaft rotation is determined by the formula

The lack of gear is the elasticity of transmission. When increasing the load torque on the shaft slow rotation it lags at some angle from the position corresponding to idling.

A magnetic gear has no mechanical contact between moving parts, it does not wear out, silent in the works is, has a long service life, defined by bearings that allow the shock load, since the communication between the shafts through the magnetic field, and the introduction of hollow cylinders allows to increase the transmitted torque while maintaining size.

A magnetic gear with the rotor rapid rotation of the permanent magnet, the rotor slow rotation in the form of a hollow cylinder and the stator magnetic circuit and with teeth on its inner surface, characterized in that it introduced hollow cylinders, in turn mechanically connected to a rotor of slow rotation and the stator, the permanent magnets of the rotor fast rotating magnetized tangentially and counter and are located between the wedge-shaped pole pieces, a hollow cylindrical stator and rotor slow rotation have alternating ferromagnetic and nonmagnetic elements parallel to the axis of rotation, the angular sizes of all teeth and ferromagnetic elements are hollow cylinders are the same, the magnetic elements are hollow cylinders associated with the stator, have angular position coinciding with the angular position of the teeth of the magnetic circuit of the stator, and the number of ferromagnetic elements are hollow cylinders, which are connected with the stator and rotor slow rotation, differ within one pole of the dividing unit.



 

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