JPH06311690A - Housing cooling device of rotary electric machine - Google Patents

Abstract

PURPOSE:To provide a housing cooling device which can make a rotary electric machine small and by which the power of the rotary electric machine can be increased. CONSTITUTION:An air guide plate 64 is attached to a fin 6c for a housing. A space chamber A is formed, on the back side of a bearing inside cover 5, of a ring 8 which has been fitted and attached to a cylinder ring 6b for the housing and to a shaft 1. A plurality of holes (4) which penetrate through the cover are made in the mounting part of a bearing outer cover 4 for the housing 6 and of the inner cover 5. In addition, a plurality of holes (e) are made near the inside-diameter part of the cylinder ring 6b are made. A plurality of blades 9 are installed on the circumference at the inside of the ring 8. The bearing outer cover 4 an4 the inner cover 5 are attached to the housing 6 by a plurality of bolts 7. When the housing on the evacuation side of a totally-enclosed fan- cooled rotary electric machine is changed from a spontaneous heat dissipation system to a force cooling system in this manner, heat at the inside of the rotary electric machine can be absorbed and dissipated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing cooling device for a fully-closed outer fan type rotary electric machine.

[0002]

2. Description of the Related Art In a conventional housing of a fully-closed outer fan type electric rotating machine, there is a housing in which a plurality of fins are provided radially outside the housing to naturally cool the outside air.

[0003]

Generally, in a totally enclosed fan-type rotating electric machine, fins are provided radially on the outer periphery of the frame, and the cooling air from the fan cools the housing on the inlet side.
Furthermore, the heat generated inside the rotating electric machine was dissipated to the atmosphere by passing between the fins of the frame. However, since the cooling air is not applied to the exhaust side housing, only natural cooling by the housing fins causes insufficient heat radiation from the exhaust side housing, which hinders downsizing and power-up. In addition, the temperature of the bearing on the exhaust side also becomes high due to the heat generated by the rotating machine, causing the bearing to burn out. The present invention has been made in view of the above-mentioned points, and an object thereof is to enhance the heat dissipation effect from the exhaust side housing and dissipate the heat generated inside the rotating electric machine, thereby achieving miniaturization and power-up. An object is to provide a housing cooling device for a rotating electric machine.

[0004]

[Means for Solving the Problems] An air guide plate 6d is attached to a fin 6c of a housing. A space A is formed on the back side of the bearing inner cover 5 by the cylindrical ring 6b of the housing and the ring 8 fitted on the shaft 1. A plurality of holes d are formed in the mounting portions of the bearing outer cover 4 and the inner cover 5 of the housing 6 so as to penetrate the covers. A plurality of holes e are provided near the inner diameter of the cylindrical ring 6b. A plurality of blades 9 are provided on the inner circumference of the ring 8. Further, the bearing outer cover 4 and the inner cover 5 are attached to the housing 6 with a plurality of bolts 7.

[0005]

The operation will be described together with the embodiment.

[0006]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a housing cooling device of the present invention, FIG.
FIG. 3 is a right side view of FIG. 1.

A plurality of fins 6c are radially provided outside the housing 6 at a predetermined length and a predetermined height. A cylindrical ring 6b is provided inside. This covers the ring 8 described later. Next, a plurality of holes e are provided near the inner diameter of the cylindrical ring 6b. In addition, a plurality of holes d that penetrate the outer cover 4 and the inner cover 5 of the bearing 3 are also provided.
A plurality of mounting portions 6a and mounting holes f for mounting the frame 10 are provided on the outer peripheral portion of the housing. On the back side of the bearing inner cover 5, the space 8 is formed by the ring 8 fitted to the shaft 1 and the cylindrical ring 6b. A plurality of blades 9 are provided on the inner circumference of the ring 8. Further, the bearing outer cover 4 and the inner cover 5 are attached to the housing 6 by a plurality of bolts 7
Install with. The outer cover 4 and the inner cover 5 having a disk shape and an inner diameter are attached to the housing 6 with a plurality of bolts 7.
A disc-shaped air guide plate 6d having an inner diameter slightly larger than the outer diameter of the bearing outer cover 4 is attached to the housing fin 6c with its inner diameter portion aligned with the outer peripheral portion of the bearing outer cover 4. This cooling device is configured as described above.

Next, the operation will be described. When the rotating electric machine is loaded and rotates, the fan function of the blades 9 of the ring 8 fitted to the shaft 1 sucks air from the hole d, passes through the space room A, and passes through the hole e to the air guide plate 6d. Guided by, the housing fins 6c are cooled and discharged to the atmosphere. In addition, since the heat inside the rotary electric machine accumulated in the space room A through the cylindrical rings 6b and 8 is also discharged to the atmosphere at the same time, the cooling effect is enhanced in a composite manner.
Further, since the air passes through the bearing outer cover 4 and the inner cover 5, the bearing 3 is also cooled.

[0009]

As described above, cold air is sucked through the bearing outer cover and the inner cover with the fan function by the blades, the fins of the housing are cooled, and the heat inside the rotating electric machine is dissipated to the outside. You can At that time, the heat inside the rotating electric machine, which is transmitted from the cylindrical ring and accumulated in the space room, can also be dissipated to the atmosphere at the same time, and composite heat dissipation can be performed. It comes off. Further, it has an effect of protecting the bearing from the temperature rise of the bearing.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a housing cooling structure according to an embodiment of the present invention.

2 is a reduced right side view of FIG. 1. FIG.

[Explanation of symbols] 1 shaft 2 oil remover 3 bearing 4 outer cover 5 inner cover 6 housing 6a frame mounting part 6b cylindrical ring 6c housing fin 6d air guide plate 7 bolt 8 ring 9 blade 10 frame 10a frame fin d hole e hole f Mounting hole A space room

Claims (1)

[Claims] (A) A plurality of fins (6c) are radially provided at a predetermined length and a predetermined height on the outside of a housing (6). A cylindrical ring (6b) is provided inside. Next, a plurality of holes e are provided near the inner diameter of the cylindrical ring (6b). Further, a plurality of through holes (d) are provided in the mounting portions of the outer cover (4) and the inner cover (5) of the bearing (3). Further, a plurality of mounting portions (6a) and mounting holes (f) are provided on the outer peripheral portion of the housing. (B) On the back side of the bearing inner cover (5), the space (A) is formed by the ring (8) fitted to the shaft (1) and the cylindrical ring (6b). A plurality of vanes (9) are provided on the inner circumference of the ring (8). (C) The bearing outer cover (4) and the inner cover (5) are attached to the housing (6) with a plurality of bolts (7). Install the air guide plate (6d) in the housing (6c). A housing cooling device for a rotary electric machine having the above configuration.