JPS5941135A - Waterproofing device for bearing box - Google Patents

Abstract

PURPOSE:To prevent water from invading into a waterproof cover by sealing the rotational shaft passing section of the cover by a rubber rotary finger. CONSTITUTION:A waterproof cover 23 which surrounds the outside end is mounted through a sealing packing 27 on a bearing box 22b, and a rubber finger 25 is arranged inside the cover 23 in such a manner that the rotary shaft passing section of the cover 23 is contacted to be able to be sealed. Even if service water which has high pressure is applied to this section, it can alleviate the water from invading into the cover, and even if the water is invaded into the interior, it can be drained by the finger 25, and can exhaust the water from a drain hole 23a formed at the lower part of the cover 23.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waterproofing device for a bearing box in a horizontal shaft outdoor rotating electric machine, which is capable of increasing the waterproofing effect.

A conventional example of a waterproofing device for a bearing box will be explained based on FIG. This figure shows an outdoor type rotating electrical machine with a horizontal axis, in which a waterproof cover 8 is attached to the outer end surface of a bearing box 2 surrounding the bearing 1, and a rotating shaft protrudes through the bearing box 2 and the waterproof cover 8. A disk-shaped flinger 5 is fitted into the bearing box 2 of the shaft 4 and the waterproof cover 8. The rainwater that falls on the bearing box 2 falls along the outer surface of the waterproof cover 8 and enters through the rotating shaft penetration part of the waterproof cover 8. The rainwater is also shaken off by the flinger 5 and drained to the drain provided in the F section of the waterproof cover 8. hole 8
Since April this year, rainwater has been discharged from A and has been designed to prevent rainwater from entering the inside of bearing box 2.

With this kind of structure, there is no problem with the waterproof performance specified in the outdoor type standard, but if the entire machine is washed with high-pressure tap water, water may enter through the rotating shaft penetration part of the waterproof cover 8. There was a drawback that the tap water entered into the bearing box 2 and impeded the performance of the lubricating grease of the bearing 1.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, it is an object of the present invention to provide a waterproofing device for a bearing box, which has an increased waterproofing effect and can prevent the intrusion of pressurized tap water.

Embodiments of the present invention will be described below based on the drawings.

FIG. 2 shows a waterproofing device for a bearing box according to the present invention, and parts indicated by the same reference numerals as in FIG. 1 are the same parts. This figure shows an outdoor rotating electric machine with vibration-proof support for the horizontal axis, in which a pair of left and right brackets 22 that support the rotating shaft 4 via a bearing 1 are formed by extruding a steel plate from one side of the plate. Extended portion 2 extending in the axial direction from the outer periphery of 22
After the tips of the extension parts 21 are fitted into the outer periphery of the stator 26 up to the center, the tips of the extension parts 22B are fixed to each other by welding or the like, so that they are integrally attached. a bearing box 2 surrounding the bearing 1;
A waterproof cover 28 made of a steel plate and having a U-shaped cross section that surrounds the outer end surface of the bearing box 22b is fitted and fixed on the outer periphery of the bearing box 2b by press-fitting or the like, and the rotating shaft 4 protrudes through the bearing box 22b and the waterproof cover 28. ing. An annular backing 27 made of an elastic material such as rubber having vibration-proof properties is fitted into the outer peripheral end of the waterproof cover 28, and the outer peripheral end of the waterproof cover 28 is sealed with this backing 27. There is. Further, the entire electric machine is vibration-proofly supported by U-shaped mounting legs 28 that span the left and right backings 27.

. Between the rotary shaft 40 bearing mz2b and the waterproof cover 23, a disc-shaped linker 25 made of rubber or the like is fitted and fixed by press-fitting or the like. This Flinger-2
5 is adapted to seal the rotating shaft penetrating portion of the waterproof cover 23 by contacting the tip of an annular protrusion 23b formed by extruding the rotating shaft penetrating portion of the waterproof cover 23 inwardly. This sealing part is made by installing a cylindrical boss 85B or an outward annular protrusion on the inner circumference of the coma linker 35, as shown in FIG. Make sure it comes in contact with the side (koshidemo t)
The effect of in can be obtained.

According to the embodiment, the rotating shaft penetrating portion of the waterproof cover 28.3B is connected to the linker 25.3B. Since it is sealed with B5, it is possible to reduce water intrusion into the inside of the waterproof cover 28.88 even if high-pressure tap water is splashed on it, and water that has entered the inside can be shaken off by the flingers 25 and 35. It can be drained from the drain hole 288188B provided at the bottom of the waterproof cover 28.8B. Furthermore, since the flingers 25 and 85 are made of a material such as rubber that reduces frictional torque when wetted with water, and are made to contact the waterproof cover 23.38 at the small diameter portion, the frictional torque can be reduced. .

In the above embodiment, the case of a rotating electric machine supported with vibration isolation was explained, but the present invention is not limited to this.

As described above, according to the present invention, in a waterproofing device for a bearing box through which a rotating shaft passes, a waterproof cover surrounding the outer end surface of the bearing box is attached via a sealing backing, and a rubber The rotary flinger is placed in sealing contact with the rotating shaft penetration part of the waterproof cover, which increases the waterproofing effect and reliably prevents water from entering the inside of the bearing box. Effects can be obtained.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view showing a conventional waterproofing device for a bearing box.
The figure is a longitudinal sectional view showing a waterproofing device for a bearing box according to the present invention.
FIG. 3 is a longitudinal sectional view showing another embodiment of the present invention. 4...Rotating shaft, 22b...Bearing box, 28.33...
・Waterproof cover +-125, 85...Flinger, 27・
...Backing 3゜Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1) A waterproof cover with a U-shaped cross section that surrounds the outer end surface of the bearing box through which the rotating shaft passes is fitted and fixed onto the outer periphery of the bearing box, and the tip of this waterproof cover is sealed with a backing made of an elastic material. A waterproofing device for a bearing box, characterized in that a rubber flinger is fitted and fixed between the bearing box of the rotating shaft and the waterproof cover by bringing the rubber flinger into sealable contact with the rotating shaft penetrating portion of the waterproof cover. .