RU2321937C1 - Synchronous generator - Google Patents

Abstract

FIELD: electrical engineering; electrical machines and inductor generators in particular.

SUBSTANCE: proposed synchronous generator that has front and rear end plates with holes, stator in the form of stack that carries running winding, rotor incorporating field source and claw-shaped shoes, all built in rectifier, and hollow-shaft rotor with radial holes; novelty is that end plates mount angle-shaped pipe connections with holes of different diameter; smaller-diameter holes are facing shaft holes and larger diameter ones are facing oncoming air stream. Such mechanical design enables effective use of inlet air stream action with respect to widely used progressive crosswise arrangement of front-drive motor-car engines. In addition, shaft provided with through hole and two inlet pipe connections makes it theoretically possible to enhance cooling air flowrate by two times and to likewise improve heat transfer.

EFFECT: improved performance characteristics of inductor generator due to reduced power requirement and improved thermal characteristics.

1 cl, 1 dwg

Description

The invention relates to electric machines, namely to synchronous generators.

Known synchronous generators containing a shaft, covers with bearings, a rotor in the form of an asterisk mounted on the shaft having magnetic contact with the stator, in addition, a coil with a winding with a magnetic circuit in magnetic communication with the second axial magnetic circuit is mounted on one of the covers (one-way excitation) mounted on the rotor and having magnetic contact with the sprocket. A similar coil can be mounted on the second cover (two-way excitation). Constructive varieties of this generator are described, for example, in [1].

The disadvantage of this machine is its large masses and dimensions, as well as the fact that the frontal parts of the stator winding lying behind the stator along the cooling air are cooled by the air already in front of the stator, which is already heated from the frontal parts.

The closest to the claimed invention in technical essence and the achieved results is a non-contact synchronous generator [2], containing a front and rear cover with holes, a stator in the form of a package with a working winding, a rotor with an excitation source and claw-shaped tips, built into the rectifier, the rotor hollow shaft with radial holes.

The disadvantage of this device is the low efficiency of the ventilation effect of the slots in the bending zone of the claw-shaped poles, since these slots have a relatively small area, as well as the low ventilation efficiency of the claws of the poles due to their cantilever arrangement.

The technical result, which consists in improving operational characteristics by reducing power consumption and improving thermophysical characteristics is ensured by the fact that in a synchronous generator containing a front and rear cover with holes, the stator is in the form of a package with a working winding, a rotor with an excitation source and a claw-shaped lugs built into the rectifier, the hollow shaft of the rotor with radial holes, while according to the invention on the covers are installed angular nozzles with holes Nogo diameter, the smaller diameter opening facing the shaft holes and the holes of greater diameter facing towards the incoming air flow.

The drawing shows a General view of a synchronous generator.

This synchronous generator contains input nozzles of an angular shape 1 and 17, a drive pulley 2, a front cover 3, a stator 4 with a winding, tightening screws 5, a back cover 6, on which a rectifier housing 7, a hollow shaft 8, and an insulating sleeve 9 are installed, on which slip rings are in contact with the brushes. Radial holes 10 are made in the hollow shaft 8, radial holes 11, 13 are made in the covers 3 and 6, the claw-like poles in the bending zone are provided with slots 12. The shaft rotates in the bearings 14, the drive pulley 2 is mounted on the shaft 8 with a key and a nut 15, the shaft has a central inlet 16 of the cooling system. The angular shaped nozzles have holes of a smaller diameter 18, facing the holes of the shaft, and holes of a larger diameter 19, facing the incoming air flow, the direction of which is shown by arrows.

The device operates as follows. The incoming air stream enters the larger opening 19 of the inlet pipes, thereby creating pressure at the inlets of the central hole 16, then the air passes through the radial hole 10, cools the rectifier and the frontal parts of the stator and is discharged through the radial holes 11 and 13 of the covers 3 and 6. Slots 12 made in claw-shaped poles play the role of ventilation blades, enhancing air circulation and intensifying heat transfer.

The use of this design allows you to effectively apply the impact of the input air flow in relation to the progressive, widespread transverse arrangement of the engine of front-wheel drive cars. In addition, the use of a shaft with a through hole and two inlet pipes 1 and 17 allows theoretically 2 times to increase the flow rate of the cooling refrigerant - air - and to improve the heat transfer by the same amount.

Information sources

1. Zhezherin R.P. Inductive generators. / M.-L., Gosenergoizdat, 1961, 319 p., Ill.

2. RF patent No. 2231199 - Non-contact synchronous generator / A. M. Litvinenko, application No. 2003109938, publ. 04/07/2003, bull. No. 17, MPK7 Н02К 19/06.

Claims (1)

A synchronous generator comprising a front and a back cover with holes, a stator in the form of a package with a working winding, a rotor with an excitation source and claw-shaped tips, built-in rectifiers, a hollow rotor shaft with radial holes, characterized in that the caps have angular shapes with holes of different diameter, with holes of smaller diameter facing the holes of the shaft, and holes of larger diameter facing the incoming air flow.