Face-type induction machine

FIELD: electrical and electromechanical engineering; face-type induction machines having one stator and one rotor.

SUBSTANCE: proposed machine has stator ring-type magnetic cores carrying field winding, as well as squirrel-cage rotor, stator base endshield accommodating supporting sleeve, rotor disk, bearing assembly incorporating rotor shaft bearings, and thrust bearing. Stator base endshield is fixed in position by means of enclosing hollow cylinder with thrust bearing disposed on its inner surface and tightly fitted on one end to annular boss of hollow cylinder and on other end abuts against rotor disk. Up to three actuating mechanisms can be coupled with this machine.

EFFECT: enhanced diametric dimensions of stator and rotor cores, minimized air gap between them, enhanced loading capacity and operating reliability of machine.

1 cl, 1 dwg

 

The invention relates to electrical engineering and electrical engineering, namely mechanical electrical machine with a stator and one rotor. Such machines can be used to drive devices and mechanisms in machine tools, mechanical engineering, ventilyatorostroeniya and other industries.

The invention is directed to the solution of the technical problem consisting in obtaining the mechanical asynchronous machines with increased diameters of the magnetic circuits of the stator and rotor and with a reduced air gap between them, while increasing load capacity and operational reliability of the machine.

Closest to the claimed invention is a mechanical electrical asynchronous machine [1], containing the annular magnetic circuit of the stator winding and rotor cage winding, the base shield stator with the installed base glass, the rotor disc, bearing unit, containing the bearings of the rotor shaft and the thrust bearing on the outer surface of the supporting glass.

However, the known electric machine has disadvantages, namely the diameter of the thrust bearing is small, so for large diametrical sizes of the magnetic circuits of the stator and rotor and at a small distance of the air gap between them is difficult to maintain the parallelism between working surfaces of a hundred the ora and rotor. Emerging significant axial attractive forces create a torque which causes the uneven pull of the rotor and further violation of the magnitude of the air gap, which becomes even more uneven. In the car it may be turning the moment at the expense of actuators connected with the shaft end of the machine. These reasons can cause distortions between the working surfaces of the cores and even their grazing.

Thus, the known electric machine can only be used for relatively small capacities and high values of the air gap.

The invention solves the problem of creating mechanical electrical asynchronous machine with a larger diameter of the magnetic circuits of the stator and rotor and with a minimum air gap while increasing its load capacity and reliability.

This is achieved by the mechanical electrical asynchronous machine containing the annular magnetic circuit of the stator winding and rotor cage winding, the base shield stator with the installed base glass, the rotor disc, bearing unit, containing the bearings of the rotor shaft and the thrust bearing, unlike the prototype of the basic shield stator still covered by a hollow cylinder, and hard on Lipnik placed on the inner surface of the hollow cylinder and one side is drawn in to the circular protrusion of the hollow cylinder, and on the other side abuts against the disk rotor and is fixed annular projections of the disk.

The invention is illustrated by the drawing, which is a cross sectional view of the proposed machine.

On the base Board 1 is fixed annular magnetic core 2 with the excitation winding 3. In the bearing Cup 4, is pressed into the shield 1 and having an outer annular ledge 5 for a fixed mechanical connection of the machine with the Executive mechanism, installed two bearings, one radial 6 for the radial load, the other angular contact 7 to the radial and axial load. The inner rings of the bearings 6 and 7 cover the rotor shaft 8, and the outer rings rest against the inner annular protrusion 22 of the support Cup.

The rotor has an annular magnetic core 14 with squirrel-cage winding 16. The annular magnetic core 14 is rigidly fixed on the body of the rotor. The body of the rotor in the form of a disc 9 is pressed on the shaft 8 and is supported by bearings 6 and 7. The disk 9 has two annular protrusion 10 and 21. Basic shield stator 1 still comprises a hollow cylinder 11, on the inner surface of which is annular ledge 13. The thrust bearing 12 is mounted on the inner surface of the hollow cylinder 11. His stationary ring is preloaded to the annular projection 13 of the hollow cylinder 11, and a movable ring rests on the disk rotor and recorded two annular projections of the disk - 10 and 21.

The location of the thrust bearing 12 on the inner surface of the hollow cylinder 11, and shaft bearings 6 and 7 in the bearing Cup 4 can increase the stiffness of the base of the rotor to retain the minimum air gap between the working surfaces of the magnetic circuits of the stator and rotor when they are enlarged diametrical sizes, eliminate gut-wrenching action of shear forces.

On the inner surface of the magnetic rotor 14 is fixed impeller 17 with blades 18. The direction of movement of the cooling air comes through the vents 15. The pressed part of the enclosure, the Cup 19 performs a protective function. On the outer surface of the hollow cylinder 11 posted by terminal box 20.

Electric machine operates as follows. After connecting the stator winding to the network, the result of the interaction of a rotating field on the conductors of the squirrel-cage winding of the rotor, the motor is in rotation.

The resulting axial force of attraction of the magnetic cores 1 and 14 are perceived angular contact bearing 7 and the thrust bearing 12. Due to the fact that the diameter of the rings of the thrust bearing 12 is commensurate with the diameter of the hollow cylinder 11 and considerably exceeds the diameter of the outer ring of the angular contact bearing 7, this eliminates re the wasp magnetic circuits of the stator and rotor from the transverse forces of magnetic attraction, and the forces transmitted to the rotor shaft actuating mechanism. This is achieved by increasing the load capacity and reliability.

The proposed design of the mechanical asynchronous machine allows you to attach up to three actuators: to the motor shaft 8 and to the outer flat surface of the disk rotor 9; to the outer cylindrical surface of the disc 9 through the gear, put into engagement with the driven gear. In the latter case, the PTO may be carried out with higher speeds compared to the speed of the shaft 8.

The proposed design of the mechanical asynchronous electric machine is quite simple to use and adaptable to production.

The source of information

1. Patent RU No. 2140700 C1, 6 CL H 12 K 5/173, 5/16, 17/16. Mechanical electrical asynchronous machine. Zagrodzki VI, Kabakov ET, Jones, H.E., 1999, BI No. 30.

Mechanical electrical asynchronous machine containing the annular magnetic circuit of the stator winding and rotor cage winding, the base shield stator with the installed base glass, the rotor disc, bearing unit, containing the bearings of the rotor shaft, thrust bearing, characterized in that the base shield stator still covered by the hollow cylinder and the thrust bearing is placed to the inside of the surface of the hollow cylinder and one side is drawn in to the circular protrusion of the hollow cylinder, but on the other hand apart in the rotor disc and the fixed annular projections of the disk.



 

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FIELD: electrical and electromechanical engineering; face-type induction machines having one stator and one rotor.

SUBSTANCE: proposed machine has stator ring-type magnetic cores carrying field winding, as well as squirrel-cage rotor, stator base endshield accommodating supporting sleeve, rotor disk, bearing assembly incorporating rotor shaft bearings, and thrust bearing. Stator base endshield is fixed in position by means of enclosing hollow cylinder with thrust bearing disposed on its inner surface and tightly fitted on one end to annular boss of hollow cylinder and on other end abuts against rotor disk. Up to three actuating mechanisms can be coupled with this machine.

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SUBSTANCE: invention relates to electrical engineering and may be used in other engineering branches, for example wind-power engineering. The main point of the invention is the use of specific common rotor in asynchronous machine with two stators and common rotor. The above-mentioned common rotor rotates freely with regard to the shaft and at the same time has two separate short-circuited windings for each stator and one common short-circuited winding for both stators. One stator is fixed to the shaft, while the other rotates together with it. The windings of the fixed stator and the stator rotating together with shaft are made up from windings of two or more unequal sections of the above stators. In addition, the minor sector of the fixed stator winding and the minor winding sector of the stator rotating together with the shaft are connected to the mains. The same connection is ensured for large sectors or next by the size sections of the fixed stator or stator rotating together with stator shaft.

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