JPS6246043Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealing mechanism in which a sealing member is attached to a rotating shaft.

Conventionally, this type of sealing mechanism has been used, for example, in the sealing mechanism of a water pump 1 shown in FIG. A rotary drainer 4 was provided. However, the sealing against water vapor is not sufficient, and the water vapor enters the bearing, resulting in rusting of the bearing.

The purpose of the present invention is to prevent water vapor from entering the bearing, improve sealing performance, and prevent rust from forming on the bearing.

In order to achieve the above object, in the configuration of the present invention, a space opening toward the rotating shaft is formed in a sealing member attached to the rotating shaft, and the space is filled with grease.
A notch is formed in the sliding surface of the seal member against the fixed wall, and the grease is applied to the sliding surface of the seal member through the notch by centrifugal force caused by rotation of the rotating shaft.

With the above configuration, in the present invention, the sealing effect against water vapor etc. is greatly improved, and the space formed in the sealing member is filled with grease, which lubricates the sliding surface of the sealing member with the fixed wall. As a result, the durability of the seal member can be increased by preventing wear of the seal surface of the seal member due to the rotation of the rotating shaft, and the sliding resistance of the seal member does not become large and the generation of sliding noise etc. It also has the excellent effect of preventing

An embodiment of the present invention will be described below with reference to the accompanying drawings. In Figure 2, water pump 1
The rotor 11 of 0 is a shaft 1 supported by a bearing 12.
3, and a well-known mechanical sealing device 14 is disposed between the bearing 12 and the rotor 11. This sealing device 14 has a ceramic plate 14 attached to a holding member 14a attached to the rotor 11.
b is fixed, and a carbon sliding member 14e attached to a bellows 14d on a holding member 14c fitted to the body member 15 is pressed against the face plate 14b by a spring 14f. A sealing mechanism according to the present invention is disposed between the sealing device 14 and the bearing 12.

The sealing member 16 of this sealing mechanism is fixed on the shaft 13 by a cylindrical part 16a, and has a tongue part 16b.
It is in sliding contact with the side surface 15a of the body member 15 at. Furthermore, a space 16c is formed in the tongue 16b, and this space 16c is filled with grease 17. As shown in FIG. 4, a plurality of notches 16e communicating with the space 16c are formed on the sliding surface 16d of the tongue 16b that contacts the body member 15. As shown in FIG. Incidentally, as shown in FIG. 5, the tongue portion 16b
At the tip of the projection 1, the projection 1 surrounds the space 16c.
6f may be formed to increase the grease holding power. Note that 18 indicates a drain hole formed in the body member 15.

Now, when the shaft 13 rotates, the sliding surface 16d of the tongue portion 16b slides while maintaining contact with the side surface 15a of the body member 15. As the shaft 13 rotates, the grease 17 is applied to the sliding surface 16d from the plurality of notches 16e.
and be lubricated. At this time, the grease 17 stored in the space 16c is constantly replenished onto the sliding surface 16d of the seal member 16 as the shaft 13 rotates. Note that the rotor 1 is heated by frictional heat (20°C to 30°C) generated by friction between the plate 14b and the sliding plate 14e of the mechanical sealing device 14.
One portion of the water (80° C. to 120° C.) turns into water vapor and flows toward the bearing 12, but is blocked by the seal member 16 and released from the drain hole 18 to the outside.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a water pump equipped with a conventional sealing device, and FIG. 2 is a sectional view of a water pump to which a sealing mechanism according to the present invention is applied.
Figure 3 is an enlarged sectional view of the sealing mechanism according to the present invention;
4 is a view from A in FIG. 3, and FIG. 5 is a sectional view showing a modified example of the sealing mechanism in FIG. 3. 12...Bearing, 13...Shaft, 15...Body member, 15a...Side surface, 16...Seal member, 16
c...Space, 16d...Sliding surface, 16e...Notch, 17...Grease.

Claims (1)

[Scope of utility model registration request] In a sealing mechanism in which a sealing member is attached to a rotating shaft, a space opening toward the rotating shaft is formed in the sealing member, and the space is filled with grease;
A sealing mechanism, wherein a notch is formed in the sliding surface of the seal member that contacts the fixed wall, and the grease is lubricated from the notch to the sliding surface by centrifugal force caused by rotation of the rotating shaft.