Synchronous generator

FIELD: electric engineering, in particular, specific structural features of electric machines, namely - inductive generators.

SUBSTANCE: in synchronous generator, which contains frontal and back lids with apertures, stator in form of a packet with working winding, rotor with excitation source, hollow shaft of rotor with radial apertures and with central aperture, which is connected to input aperture of cooling system, air conductor and rectifier, according to given invention, rectifier is made in form of horizontal assembly with linear placement of diodes, where horizontal assembly is positioned in aperture of hollow shaft and held by cantilevers which pass through walls of air ducts and are held on lids. Usage of aforementioned structure allows substantial improvements to generator cooling, especially that of its rectifier, which is positioned first along air route, and also provides for increased compactness of structure, because shaft hollow is used for placement of rectifier, which simultaneously allows to reduce axial dimensions of generator.

EFFECT: improved operational characteristics due to reduction of consumed power and improvement of thermo-physical characteristics.

1 dwg

 

The invention relates to electric machines, and in particular to synchronous generators.

Known synchronous generators containing the shaft, cover with bearings, a shaft mounted rotor in the form of stars with magnetic contact with the stator, in addition to one of the covers (unilateral action) set coil winding with the magnetic circuit being in magnetic communication with the second axial magnet mounted on the rotor and having a magnetic contact with an asterisk. The same coil can be mounted on the second cover (bilateral stimulation). Structural variants of a given generator is described, for example, in [1].

The disadvantage of this machine are large masses and dimensions, and that the end windings of the stator behind the stator during the cooling air cools the already heated from the frontal parts of the air, lying in front of the stator.

Closest to the claimed invention to the technical essence and the achieved results is contactless synchronous generator [2], which contains the front and back cover with holes, a stator in the form of a package with an operating winding, a rotor with excitation source, a hollow rotor shaft with a radial hole; the hole of the hollow shaft is connected with the inlet of the cooling system, the air duct, the rectifier.

The disadvantage of this device is the low efficiency of the ventilation effect of the slits in the area of the curve claw poles, as these slots have a relatively small area, and low efficiency of the ventilating action of the claw poles because of their console location.

The technical result consists in the improved performance by reducing power consumption and improve thermal characteristics, is ensured by the fact that in a synchronous generator, containing front and back cover with holes, a stator in the form of a package with an operating winding, a rotor with excitation source, a hollow rotor shaft with radial holes, the hole of the hollow shaft is connected with the inlet of the cooling system, the air duct, the rectifier, while, according to the invention, the rectifier is made in the form of a horizontal Assembly with a linear arrangement of the diodes, while the horizontal Assembly is placed in the hole of the hollow shaft and is fastened using brackets passing through the wall of the passage and secured to the covers.

The drawing shows a General view of the synchronous generator.

The generator contains inlet pipe 1, the drive pulley 2, the front cover 3, a stator 4 with the coil, the clamping screws 5, the back cover 6, which is the case is prameela 7. The hollow shaft 9 provided with a cover 8. In the shaft a radial holes 10 and 11, the lid 3 and 6 are radial holes 12. On the shaft is installed asterisk with the body 13 and teeth 14. The asterisk adjacent axial magnetic core 15, which is in magnetic contact through the gap 16 with the magnetic coil 17 and 18. The coil is equipped with ferromagnetic cheek 19 having radial slots 20 located opposite the holes 10 and 11. The shaft rotates in bearings 21, the drive pulley 2 mounted on the shaft 9 by pins and nuts 22, the shaft has a Central inlet opening 23 of the cooling system. The rectifier is made in the form of a horizontal Assembly having a rod 24, which is fixed to the diode 25 with radiators 26. The rod 24 is fixed to the bracket 27, passing through the wall of the entrance lad 1 air duct and is secured to the front cover 3.

The device operates as follows. The input flow of air through the pipe 1 enters the Central hole 23, in which is placed a horizontal Assembly with diodes 25 and radiator 26. The air passes through a radial hole 10 and 11, then the centrifugal effect caused by the presence of teeth 14 stars who play the role of the blades, is ejected through the holes 12 in the cover 3 and 6 in the environment. However, due to the symmetric double-sided excitation,and the symmetrical arrangement of apertures 10, 11 and 12, both side end parts of the stator are cooled by the fresh air, not heated, as in the generators of the traditional type.

The use of this design can significantly improve the cooling of the generator, especially the rectifier, which is located on the first move air, it also significantly improves the compactness of the design, since the hollow shaft is used for the rectifier, which simultaneously makes it possible to reduce the axial dimension.

Sources of information

1. Zhezherin R.P. Induction generators / M.-L., Gosenergoizdat, 1961, 319 S., Il.

2. RF patent №2231199 - Contactless synchronous generator / A.m.litvinenko, application No. 2003109938, publ. 07.04.2003, bull. No. 17, IPC 7 NC 19/06.

Synchronous generator containing the front and back cover with holes, a stator in the form of a package with an operating winding, a rotor with excitation source, a hollow rotor shaft with radial holes, the hole of the hollow shaft is connected with the inlet of the cooling system, the air duct, the rectifier, wherein the rectifier is a horizontal Assembly with a linear arrangement of the diodes, while the horizontal Assembly is placed in the hole of the hollow shaft and is fastened using brackets, passing through the walls of the passage and secured to the covers.



 

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