SU851656A1

SU851656A1 - Electric machine

Info

Publication number: SU851656A1
Application number: SU802870328A
Authority: SU
Inventors: Николай Николаевич Конохов; Леонид Александрович Збарский; Юрий Васильевич Поршнев; Николай Андреевич Куцын; Павел Антонович Сороко
Priority date: 1980-01-18
Filing date: 1980-01-18
Publication date: 1981-07-30

Description

(54) ЭЛЕКТРИЧЕСКАЯ МАШИНА(54) ELECTRIC MACHINE

1one

Изобретение относитс к электротехнике и касаетс охлаждени электрических машин .The invention relates to electrical engineering and relates to the cooling of electrical machines.

Наиболее близкой к предлагаемой вл етс электрическа машина с радиально-согласной системой вентил ции, содержаща ротор с аксиальными каналами, статор с обмоткой, под лобовыми част ми которой на валу установлены осевые вентил торы , состо щие из лопаток и несущей их ступицы 1..Closest to the present invention is an electric machine with a radial consonant ventilation system, containing a rotor with axial channels, a stator with a winding, under the frontal parts of which axial fans are mounted on the shaft, consisting of blades and a hub 1 bearing them.

Недостатком известной конструкции вл етс то, что при стремлении сократить машину по длине, расположив осевые вентил торы ближе к ротору,-а также при низких уровн х -расположени входа аксиальных каналов и большом радиальном размере ступицы вентил тора хладагент не может попадать напр мую из вентил тора в аксиальные каналы. Вентил торы дуют на торцовую часть ротора, от которой, завихр сь, поток мен ет направление движени к входу аксиальных каналов. При этом эффективность охлаждени проигрывает из-за потери динамического напора и повышени аэродинамического сопротивлени потоку хладагента на входе в аксиальные каналы ротора . В результате снижаетс расход хладагента через радиальные каналы ротора и статора и повышаетс нагрев электрической машины.A disadvantage of the known construction is that when striving to shorten the machine in length, placing axial fans closer to the rotor, and also at low levels of the position of the axial channels and the large radial size of the fan hub, the refrigerant cannot flow directly from the valve. torus into axial channels. Fans blow on the end of the rotor, from which the flow swirls to change the direction of movement to the entrance of the axial channels. At the same time, the cooling efficiency is lost due to the loss of dynamic pressure and an increase in the aerodynamic resistance to the flow of coolant at the entrance to the axial channels of the rotor. As a result, the flow rate of the refrigerant through the radial channels of the rotor and the stator is reduced and the heating of the electric machine is increased.

Цель изобретени - повышение эффективности охлаждени электрической машиныThe purpose of the invention is to increase the cooling efficiency of an electric machine.

Указанна цель достигаетс тем, что наружна поверхность ступиц вентил торов выполнена конической с уклоном в сторону входа аксиальных каналов, пересекающей плоскости входных отверстий аксиальных каналов .This goal is achieved by the fact that the outer surface of the hubs of the fans is made conical with a slope towards the entrance of the axial channels intersecting the planes of the entrance holes of the axial channels.

10ten

Место пересечени конической образующей с плоскостью каждого входного отверсти аксиальных каналов расположено в обращенной к валу зоне плоскости входного отверсти .The intersection of the conical generatrix with the plane of each inlet of the axial channels is located in the zone of the inlet plane facing the shaft.

На чертеже представлена электрическа The drawing shows the electric

15 мащина, продольный разрез.15 machine, longitudinal section.

Claims

The electric machine comprises a stator 1 with frontal parts of the winding 2, under which axial fans 4 are mounted on the shaft 3. The fans consist of blades 5 and a carrier hub 6. The outer surface 7 of the fan hubs are made conical with a slope in the direction of the axial inlets channels 9 of the rotor 10. Conic forming 11 intersects with the plane of the inlet openings of the axial channels 9 in its lower part. Electric machine works as follows. The coolant, the passage through the fan, splits into two streams: the upper one - to the frontal part of the stator winding, the lower one - on the slope of the conical hub directly to the entrance to the axial channels of the rotor. In this case, the direction and magnitude of the flow rate going into the axial channels of the rotor does not change, the aerodynamic resistance of the entrance to the axial channels decreases significantly, the air flow through the active part of the electrical mask increases, which increases the efficiency of its cooling. Thus, the positive effect of the proposed technical solution is to increase the cooling efficiency of the electric machine. Claims 1. An electric machine with radial ventilation, comprising a rotor with axial channels, a stator with a winding. Under the frontal parts of which axial fans are mounted on the shaft, consisting of blades and a hub bearing them, characterized in that, in order to increase cooling efficiency, the outer surface of each fan hub is made conical with a slope towards the axial channels and with the generatrix, the cross-cutting plane of the inlet openings of the axial channels.

2. The machine according to claim 1, characterized in that the intersection of the conical generatrix with the plane of each inlet of the axial channels is located in the area of the inlet plane that faces the shaft. Information sources. Taken into account during the examination 1. Electric machines of alternating current. Proceedings TSKTBKEM, no. 1, “Energie, 1973, p. 186.