RU2448404C1 - Terminal electrical machine - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: method is realised by variation of terminal electric machine stator and rotors design variation, and also by using non-magnet and dielectric materials in bearing structures of the machine, which make it possible to reduce losses from occurrence of vortex currents. Application of up-to-date non-magnet and dielectric materials with sufficient heat resistance and strength exceeding strength of metals, and also with lower volume weight in manufacturing of electric machines will make it possible to wider use terminal electric machines of the proposed design in aircraft building.

EFFECT: improved manufacturability of terminal machines production, higher stiffness of their main parts and increased power indices of a terminal electric machine.

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Description

The invention relates to electrical engineering and can be used to generate electrical energy and convert electrical energy into mechanical energy.

Known designs face electrical machines with one stator and two rotors.

A known end-face electric machine (AS USSR No. 462255, publ. 02.28.1975), containing a baseless stator drawn from coil groups, the active part of which is made of alternating winding conductors and separated by a layer of insulation sheet ferromagnetic elements, the core the stator, on which the active parts of the coil groups and two rotors located on opposite sides of the stator are mounted, and the frame of the stator is made of a material with high electrical resistance and has seats for installing coil g SCP.

Known end electric machine (RF patent No. 2246168, publ. 02/10/2005), including a stator with a winding fixed in the housing, facing the working surfaces to two disk-shaped rotors located on both sides of the stator mounted in rolling bearings, the stator is made of two halves, each of which is filled with a compound of an independent tooth layer, a distributed winding in the form of winding modules and a yoke wound from a steel tape mounted on opposite sides of this disk, and on both sides of the disk are made centering e belts on which the plates of the winding modules are concentrated, and on the disks of two rotors from the side of the working surfaces of the stator, two centering belts are made, between which permanent magnets are mounted, the pole tips of which have the shape of a plate with a section decreasing towards the edges.

Known end electric machine (RF patent No. 2313888, publ. 12/27/2007), containing a stator, including a disk mounted in the housing, and winding modules facing the working surfaces to the corresponding disk-shaped rotors with squirrel-cage windings located on both sides of the stator and installed in rolling bearings, in the stator disk, slots are made for the winding modules, the edges of which (bends) at two adjacent slots are directed to one side of the disk, and at the next two slots - to the opposite, in which are winding modules are arranged such that the two packs of plates are located one winding module of one packet of plates of two adjacent modules with the winding disk opposite side, in addition, the stator disk in the intervals between the slits under winding modules radially formed sipes.

The reason for the small introduction of known end-face electric machines is the technological complexity in manufacturing and the insufficient rigidity of the main parts of the machines - the stator and rotors.

The technical result achieved by using the present invention consists in increasing the manufacturability of manufacturing, increasing the rigidity of their main parts - the stator and rotors, as well as increasing energy performance.

The specified technical result is achieved by changing the design of the stator and rotors of the end electric machine, as well as using non-magnetic and dielectric materials in the supporting structures of the machine, which can reduce losses from the appearance of eddy currents in the designs of end electric machines. The claimed end electric machine contains a stator and two rotors, according to the invention, the stator housing, which is also the case of the end electric machine, is made of a non-magnetic, dielectric material in the form of a hollow cylinder having two symmetrical internal bores on the end sides that form a girdle, the sides of which serve the place of attachment of two carrier disks made of non-magnetic, dielectric material, which have central holes and in which they are made mirror-like cages for installation coaxially with the machine shaft of the ferromagnetic charge core of the coil groups, one of the bearing disks, along the perimeter of the central hole, for rigidity, has a shoulder with threaded holes that serve to tighten both bearing disks together; to provide additional stiffness of the stator design in places free from coil groups, remote bushings with thread and coupling screws are installed; the rotors consist of two bearing disks having hubs for landing on the shaft journals, one of the bearing disks is made of burnt ferromagnetic material, the second is made of non-magnetic, dielectric material, and the seats in which the displaced ferromagnetic cores coaxially aligned with the machine shaft are mirrored groups, a bearing disk made of a non-magnetic, dielectric material, has a collar with threaded holes along the perimeter of the outer diameter, which serve to tighten together both x bearing disks, to provide additional rigidity design of the rotor, in a place free from the coil groups mounted spacer sleeves with thread and locking screws.

Figure 1 shows a section of the end electric machine, figure 2 shows the end electric machine, figure 3 shows the structural elements of the end electric machine.

The end electric machine contains a side flange with a bearing housing 1, a shaft 2, a ferrite rotor bearing disk 3, a non-magnetic dielectric rotor bearing disk with a collar 4, a non-magnetic dielectric stator disk with a collar 5, ferrite charged rotor cores 6 with windings 7, a non-magnetic stator housing and dielectric material 8, which simultaneously serves as the body of the end electric machine, ferrite, burnt cores of the stator 10 with windings 9, a non-magnetic dielectric carrier disk of the stator 11, side flange n to the bearing socket 12.

The end electric machine can operate both in electric motor mode and in current generator mode.

In the presented design of the rotors, coil groups are used as a closed loop, that is, ferrite cores with windings. This allows the end electric machine to operate more efficiently in the current generator mode.

In this case, the front flange with the bearing socket takes the form of the front flange of the current generators of cylindrical electric machines, and a collector device is installed on the shaft of the end electric machine, onto which the conclusions of the windings of the coil groups of both rotors are switched.

The rotor of the end electric machine consists of two bearing disks, a ferrite charge disk with a hub 3 and a non-magnetic, dielectric disk with a hub 4. In both disks 3, 4 there are mirror-mounted seats for installing ferrite, charge cores 6 with windings 7.

Both discs are mounted on the shaft 2 and insure against turning with one key.

In the upper part, both bearing discs are screwed together through threaded holes made in the remote shoulder of the bearing disc 4.

To ensure the necessary stiffness, both bearing discs 3, 4 can be pulled together with screws and threaded spacers installed in places free from coil groups. The use of non-magnetic, dielectric materials for the manufacture of a carrier disk 4 can reduce losses from the occurrence of eddy currents.

The stator of the end electric machine consists of a housing 8 made of a non-magnetic dielectric material. The stator housing 8 is also the housing of the end electric machine. It is a hollow cylinder having symmetrical internal bores from the end sides that form a girdle. The cross section of the wall of the girdle is the place of attachment of the bearing non-magnetic, dielectric disks 5, 11.

Both bearing discs have mirrored seats for fastening ferrite charge cores 10 with windings 9.

To ensure rigidity, the carrier disk 5 has a remote shoulder, in which there are threaded holes around the circumference of the shoulder. Both carrier discs 5 and 11 are screwed together to form a rigid box structure. To provide additional rigidity, in places free from reel groups, spacers with threaded holes are installed in the space between the bearing disks 5 and 11, through which both bearing disks are tightened with screws. The carrier discs 5 and 11 are made of a non-magnetic, dielectric material, which allows to reduce losses from eddy currents.

The laden ferrite cores 10 with windings 9 are electromagnets and are installed with their poles facing the poles of the coil groups of rotors, which also consist of laden ferromagnetic cores 6 and windings 7. To cool the end electric machine, technological holes are made in the bearing disks of the stator and rotors.

The simple design of the main parts of the end electric machine - the stator and rotors, allows to increase the manufacturability of the manufacture of the end electric machine and to standardize them.

End electric machine on the example of an induction motor, operates as follows.

A three-phase alternating electric current is supplied to the stator winding 9, which creates a rotating magnetic field, which, according to the law of electromagnetic induction, induces EMF in closed circuits of conductors, which in our case are windings of 7 coil groups of rotors, and the induced EMF generates its own magnetic field. When the magnetic fields of the stator and rotors interact, an electromagnetic moment arises, leading the rotors to rotate. When operating in the current generator mode, the winding 9 of the end electric machine is an excitation winding.

An electric current is supplied to the excitation winding of the stator 9, which generates a magnetic field.

The rotors of the end electric machine are driven into rotation by a separate source of mechanical energy.

When the windings of the rotors cross the magnetic lines of the magnetic field of the stator, an electric current is induced in them, which is removed into the working network using a collector device.

Claims (1)

An end electric machine containing a stator and two rotors, characterized in that the stator body, which is also the body of the end electric machine, is made of a non-magnetic dielectric material in the form of a hollow cylinder having two symmetrical internal bores on the end sides that form a girdle whose sides serve the place of attachment of two carrier disks made of non-magnetic dielectric material, which have central holes and in which mirror-mounted m To install coaxially with the machine shaft the ferro-charged charge cores of the coil groups, one of the bearing disks along the perimeter of the central rigidity hole has a collar with threaded holes used to tighten both bearing disks together to provide additional stator structure rigidity in places free of coil groups , threaded bushings with threaded screws and coupling screws are installed, the rotors consist of two bearing disks having hubs for landing on the shaft journals, one of the bearing disks it is made of burnt ferromagnetic material, the second one is made of non-magnetic dielectric material, in both bearing disks there are mirror-mounted seats for installing coil groups coaxial to the machine shaft of the charged ferromagnetic cores, the bearing disk made of non-magnetic dielectric material has a shoulder with threaded holes along the perimeter of the outer diameter , used to tighten together both of the bearing discs, to provide additional rigidity to the design of the rotors in places free from coils end groups, spacers with threaded and coupling screws are installed.

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