JPH04295251A - Ventilating/cooling unit for salient pole type electric rotating machine - Google Patents

Abstract

PURPOSE:To make possible to suck the air from the driving side of a single suction/ventilation cooling type sailent pole electric rotating machine to cool the electric rotating machine and to shorten the equivalent length of the rotary shaft. CONSTITUTION:The ventilating/cooling unit is provided with a rotary shaft wind hole 12 made axially through a hollow rotary shaft 5a, a rotary shaft wind hole 13 made radially through the rotary shaft 5a, a radial fan 6 disposed oppositely to the driving side of the hollow rotary shaft 5a, a suction hole 10 and a discharge hole 11 made oppositely to the driving side. Since the air is sucked from the counter-driving side and vent through the electric rotating machine, space can be reduced on the driving side and the length of the hollow rotary shaft 5a can be shortened while furthermore the equivalent shaft diameter is reduced and the equivalent length of the hollow rotary shaft 5a can be shortened.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a ventilation cooling device for a single-suction draft-cooled salient-pole rotating electrical machine equipped with a hollow rotating shaft that also serves as a rotor center or a solid rotating shaft that has a fixed rotor center. .

0002

[Prior Art] Generators for diesel power generators used as regular or emergency power sources are subject to torsional torque from the diesel engine side, so in order to reduce torsional vibrations, the shaft of the generator is adjusted to its equivalent length. There are restrictions on In order to shorten the equivalent length of the shaft of a rotating electrical machine, the equivalent diameter of the shaft must be reduced, so some machines use a hollow shaft.

FIG. 3 is a longitudinal cross-sectional view of a conventional single-suction draft cooling type salient pole rotating electric machine. In FIG. 3, a single-suction draft-cooled salient-pole rotary electric machine consists of a stator in which a stator winding 2 is housed in a stator core 1, and a rotor. The stator is supported by a stator frame 3. The rotor is composed of a hollow rotating shaft 5a that also serves as a rotor center 5, salient magnetic poles 4 installed on the hollow rotating shaft 5a, and a radial fan 6 installed on the drive side of the hollow rotating shaft 5. ing. One end of the hollow rotating shaft 5a is connected to the shaft of a diesel engine by a bolt (not shown), and the other end is connected to a generator (not shown). When the stator and rotor are covered with the wind suction cover 7 and the wind outlet cover 8, and the hollow rotating shaft 5a is driven,
The radial fan 6 sucks in air from an intake port 10 on the non-drive side and exhausts it to an exhaust port 11 on the drive side. After the wind enters through the intake port 10 and cools the salient magnetic poles 4 of the rotor,
It passes through the ventilation duct 9 of the stator, cools the stator core 1 and the stator winding 2, and merges with the wind flowing in the axial direction of the stator frame 3 to cool the winding end of the stator winding 2 on the driving side. is cooled and exhausted from the exhaust port 11 by the radial fan 6.

FIG. 4 is a longitudinal cross-sectional view of another conventional single-suction draft-cooled salient pole rotary electric machine. In FIG. 4, the same parts as in FIG. 3 are given the same reference numerals. In FIG. 4, a single-suction draft-cooled salient-pole rotating electrical machine consists of a stator in which a stator winding 2 is housed in a stator core 1, and a rotor. The stator is supported by a stator frame 3. The rotor is a solid rotating shaft 5b
, a salient magnetic pole 4 installed on a rotor center 5 fixed to a solid rotating shaft 5b, and a radial fan 6 attached to the drive side of the solid rotating shaft 5b. The stator and rotor are covered by a wind suction cover 7 and an air outlet cover 8, and when the hollow rotating shaft 5a is driven, the radial fan 6 sucks wind from the air intake port 10 on the non-drive side, and the air is sucked in from the air intake port 10 on the drive side. Exhaust to 11. Air enters through the intake port 10 and cools the rotor's salient magnetic poles 4, then passes through the stator's ventilation duct 9, cooling the stator core 1 and stator windings 2, and cooling the stator frame 3. It merges with the wind flowing in the axial direction, cools the winding end of the stator winding 2 on the drive side, and is exhausted from the exhaust port 11 by the radial fan 6.

[0005]

However, such conventional ventilation cooling devices for salient pole type rotating electric machines have the following problems. Conventionally, in order to prevent oil vapor generated from the drive-side machine from being sucked into the rotating electric machine, the intake port 10 was provided on the non-drive side and the radial fan 6 was provided on the drive side.However, the radial fan 6 is installed. In order to secure space, the rotating shaft on the drive side becomes long, resulting in a problem that the equivalent length of the rotating shaft becomes long.

An object of the present invention is to provide a ventilation cooling device that can perform ventilation cooling without sucking oil vapor from the drive side of the rotating shaft of a single-suction ventilation cooling type salient pole rotating electrical machine, and shortens the equivalent length of the rotating shaft. With the goal.

[0007]

[Means for solving the problem] Single-suction draft cooling consisting of a stator equipped with stator windings, a rotor equipped with salient magnetic poles attached to a rotating shaft, and a radial fan on one side in the axial direction. In the salient pole type rotating electric machine, the above object is achieved by providing the radial fan and the intake/exhaust port on the non-drive side.

In the ventilation cooling device for a salient pole type rotating electric machine according to claim 1, a hollow rotating shaft serving also as a rotor center;
A rotating shaft air hole bored in the axial direction and a rotating shaft air hole bored in the radial direction in this hollow rotating shaft, a radial fan attached to the non-drive side of the hollow rotating shaft, and a wind suction cover bored in the non-drive side. Providing an intake port and an exhaust port that are similar in size to each other is suitable for shortening the equivalent length of the rotating shaft of the salient pole type rotating electric machine.

In the ventilation cooling device for a salient pole type rotating electric machine according to claim 1, a solid rotating shaft to which a rotor center is fixed, a rotor center air hole bored in the rotor center in the axial direction, and a rotor center air hole formed in the rotor center in the axial direction; By providing a radial fan attached to the non-drive side of the child center and an intake port and an exhaust port drilled in the air intake cover on the non-drive side, the equivalent length of the rotating shaft of a salient pole rotating electric machine can be shortened. suitable.

0010

[Operation] This invention provides the radial fan and intake/exhaust ports of a single-suction ventilation cooling type salient pole rotary electric machine on the non-drive side, so that ventilation cooling can be performed without sucking oil vapor from the drive side. Since the space is significantly narrowed, the axial length of the rotating shaft is shortened, and the equivalent shaft diameter is also reduced, the equivalent length of the rotating shaft can be shortened.

Furthermore, this invention provides a radial fan and an intake/exhaust port on the non-drive side of the hollow rotating shaft, so it is possible to cool the oilper by ventilation without drawing it in from the drive side, and the space on the drive side can be greatly reduced. Since the shaft length is reduced by narrowing the shaft, and the rotary shaft is made hollow to reduce the equivalent shaft diameter, the equivalent length of the rotary shaft can be shortened.

Furthermore, in this invention, since the radial fan and the intake/exhaust port are provided on the non-drive side of the solid rotating shaft, it is possible to perform ventilation cooling without sucking in the oilper from the drive side. The space is significantly narrowed to shorten the shaft length, and the rotary shaft is made solid to reduce the equivalent shaft diameter, so the equivalent length of the rotary shaft can be shortened.

[0013]

Embodiment 1 FIG. 1 is a longitudinal cross-sectional view of a salient pole rotating electric machine equipped with a ventilation cooling device according to a first embodiment of the present invention. In Figure 1,
The same parts as in FIG. 3 are given the same reference numerals. The example in Figure 1 is
A rotary shaft air hole 12 bored in the axial direction of the hollow rotating shaft 5a, a rotary shaft air hole 13 bored in the radial direction, and the hollow rotating shaft 5
A radial fan 6 installed on the non-drive side of a, and an intake port 10 and an exhaust port 1 bored in the wind suction cover 7 on the non-drive side.
1 was established.

[0014] The air flows through the intake port 1 of the wind suction cover 7 on the non-drive side.
0, passes through the rotary shaft air holes 12 and 13 of the hollow rotary shaft 5a, cools the salient magnetic poles 4, and flows into the stator duct 9.
The stator core 1 and the stator winding 2 are cooled, and the wind flows axially through the stator frame 3 through the end of the stator winding on the drive side. The winding end is cooled and exhausted from the exhaust port 11 by the radial fan 6. Since the space on the drive side is significantly narrowed to shorten the shaft length, and the rotary shaft is made hollow to reduce the equivalent shaft diameter, the equivalent length of the hollow rotary shaft 5a can be shortened.

Embodiment 2 FIG. 2 is a longitudinal sectional view of a salient pole rotating electric machine equipped with a ventilation cooling device according to a second embodiment of the present invention. In Figure 2,
The same parts as in FIG. 4 are given the same reference numerals. The example in Figure 2 is
A solid rotating shaft 5 to which the rotor center 5 is fixed, a rotor center air hole 14 bored in the rotor center 5 in the axial direction, and a radial fan 6 attached to the non-drive side of the solid rotating shaft 5. An intake port 10 and an exhaust port 11 are provided in the wind suction cover 7 on the non-drive side.

[0016] The air flows through the intake port 1 of the wind suction cover 7 on the non-drive side.
0, passes through the rotor center air hole 15, cools the salient magnetic poles 4, passes through the stator duct 9, cools the stator core 1 and stator winding 2, and cools the stator winding on the drive side. It merges with the wind flowing axially through the stator frame 3 through the wire end, cools the stator winding end on the non-drive side, and is exhausted from the exhaust port by the radial fan 6. The space on the driving side can be narrowed to shorten the axial length, and the equivalent axial diameter of the solid rotating shaft 5b can be reduced to shorten the equivalent axial length of the solid rotating shaft 5b.

[0017]

[Effects of the Invention] According to the present invention, since the radial fan and the intake/exhaust port of the single-intake draft cooling type salient pole rotary electric machine are provided on the non-drive side, ventilation cooling can be performed without sucking oil vapor from the drive side. Furthermore, since the space on the drive side is significantly narrowed to shorten the rotating shaft and the equivalent shaft diameter of the rotating shaft is reduced, the equivalent axial length of the rotating shaft can be shortened.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a salient pole rotating electric machine equipped with a ventilation cooling device according to a first embodiment of the present invention.

FIG. 2 is a longitudinal cross-sectional view of a salient pole rotating electric machine equipped with a ventilation cooling device according to a second embodiment of the present invention.

FIG. 3 is a longitudinal cross-sectional view of a salient pole rotating electric machine equipped with a conventional ventilation cooling device.

FIG. 4 is a longitudinal cross-sectional view of a salient pole rotating electric machine equipped with a ventilation cooling device according to another conventional example.

[Explanation of symbols]

1 Stator core 2 Stator winding 4 Salient pole type magnetic pole 5 Rotor center 5a Hollow rotating shaft 5b Solid rotating shaft 6 Radial fan 7 Wind suction cover 10 Intake port 11 Exhaust port 12 Rotating shaft air hole 13 Rotating shaft air hole 14 Rotor center air hole

Claims (3)

[Claims] [Claim 1] Single-suction ventilation cooling type salient pole type consisting of a stator equipped with a stator winding, a rotor equipped with salient pole type magnetic poles attached to a rotating shaft, and a radial fan on one side in the axial direction. 1. A ventilation cooling device for a salient pole type rotating electrical machine, characterized in that the radial fan and the intake/exhaust port are provided on a non-driving side of the rotating electrical machine. 2. The ventilation cooling device for a salient pole type rotating electrical machine according to claim 1, comprising a hollow rotating shaft that also serves as a rotor center, a rotating shaft air hole bored in the axial direction in the hollow rotating shaft, and a rotating shaft air hole bored in the radial direction. A salient pole type rotation characterized by having a perforated rotary shaft air hole, a radial fan attached to the non-drive side of the hollow rotary shaft, and an intake port and an exhaust port perforated in the wind suction cover on the non-drive side. Ventilation cooling equipment for electrical machinery. 3. The ventilation cooling device for a salient pole rotating electrical machine according to claim 1, comprising: a solid rotating shaft to which a rotor center is fixed; a rotor center air hole bored in the rotor center in the axial direction; 1. A ventilation cooling device for a salient pole type rotating electrical machine, characterized in that a radial fan is attached to the non-drive side of the rotor center, and an intake port and an exhaust port are provided in a wind suction cover on the non-drive side.