JP2561623Y2 - Seal ring - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a seal ring relating to shaft sealing technology.

[0002]

2. Description of the Related Art As shown in FIG. 5, a known seal ring 1 has a rectangular cross section and is mounted in a mounting groove 12 provided around a rotary shaft 11, and its outer diameter surface 2 is attached to the rotary shaft 11. The inner wall 15 of the inserted housing 14 is slidably in close contact with the inner wall 15, and one end surface 3 in the axial direction is slidably in close contact with one of the side walls 13 of the mounting groove 12 so as to seal the fluid O such as oil. Has become. The seal ring 1 is made of a synthetic resin. When the conventional seal ring 1 is used for a high-speed rotating hydraulic device such as a torque converter, the mounting groove 12
Abrasion occurs due to sliding heat generation and insufficient lubrication on one end surface 3 in the axial direction, which slides closely with the side wall 13 of the above, and there is a problem in durability.

[0003]

For this reason, conventionally, as shown in FIGS. 6 and 7, a seal ring 1 provided with a semicircular fluid introduction groove 6 opening at one end surface 3 in an axial direction and an inner diameter surface 4 as shown in FIGS. Has been devised, but this prior art includes:
Since the fluid introduction groove 6 is tapered toward the outer diameter direction and the fluid O itself entering the fluid introduction groove 6 receives sliding heat and rises in temperature, a large cooling effect is not obtained and wear is suppressed. There is a problem that the effect is insufficient.

[0004]

This invention SUMMARY OF THE INVENTION In view of the above points, which has been devised to solve the problems found in the prior art, in order to achieve this object, peripheral to the rotational axis
Is mounted in the mounting groove provided, and the outer diameter surface is inserted through the rotation shaft.
Slidably in contact with the inner wall of the housing
One end face in the direction is slidably in close contact with one side wall of the mounting groove
A sealing ring which exhibits a rectangular cross section, the provided <br/> axial end surface and the spiral fluid introduction groove which is open to an inner diameter surface, the other axial end surface from the outer diameter end of said fluid introduction groove toward the fluid discharge hole provided, to provide a seal ring, characterized in that the fluid to the inner surface provided with projections for guiding the fluid introduction groove.

[0005]

According to the present invention, a fluid which flows in the outer diameter direction due to centrifugal force due to the rotation of the rotating shaft is introduced into the fluid introduction groove to lubricate the sliding portion. The fluid introduction groove is formed in a spiral shape so that the fluid can be easily introduced. Further, the fluid is easily guided into the fluid introduction groove by being guided by the projection. The fluid introduced into the fluid introduction groove enters a fluid discharge hole opened at the outer diameter end of the fluid introduction groove, is discharged to the other end face side in the axial direction, and circulates along the above flow.

Prior to the filing of the present application, the inventor of the present application has shown in FIG. 8 to FIG. 10 a spiral fluid introduction groove 6 having a rectangular cross section and opening on one end face 3 and inner diameter face 4 in the axial direction. And a seal ring 1 in which a fluid discharge hole 7 is provided from the outer diameter end of the fluid introduction groove 6 to the other end face 5 in the axial direction. That is, the present invention is obtained by omitting the projections from the structure of the present invention. The present invention is characterized in that a protrusion is provided to increase the amount of fluid introduced into the fluid introduction groove 6 with respect to the preceding invention.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings. As shown in FIGS. 1 to 4, the seal ring 1 has a rectangular cross section and is formed into a ring shape with a predetermined synthetic resin. I have. A spiral fluid introduction groove 6 is provided at one axial end face 3 slidably in close contact with one side wall 13 of the mounting groove 12 and opens at the one end face 3 and the inner diameter face 4. A fluid discharge hole 7 is provided from the radial end to the other axial end surface 5, and a projection 8 for guiding a fluid to the fluid introduction groove 6 is provided on the inner diameter surface 4. A required number of the fluid introduction grooves 6, the fluid discharge holes 7, and the projections 8 are equally arranged. The seal ring 1 is rotated similarly to the conventional example.
The outer diameter surface 2 is mounted in the mounting groove 12 provided around the rotation shaft 11.
Slidably close to the inner wall of the housing through which the rotating shaft 11 is inserted.
And one end surface 3 in the axial direction is
It is slidably in contact with the side wall 13.

When the rotating shaft 11 rotates in the direction indicated by the arrow X, the fluid in the mounting groove 12 moves following the viscosity thereof and flows in the outer diameter direction by centrifugal force. Lubricate the sliding parts. The fluid introduction groove 6 is formed in a spiral shape along the flow of the fluid so as to easily introduce the fluid. Further, the fluid is guided by the projection 8 and is easily introduced into the fluid introduction groove 6. The projection 8 has a shape that facilitates the collection of fluid with rotation. The fluid introduced into the fluid introduction groove 6 enters the fluid discharge hole 7 opened at the outer diameter end when reaching the outer diameter end of the fluid movement groove 6, and passes through the fluid discharge hole 7 in the axial direction. It is discharged to the other end face 5 side. In order to promote the flow of the fluid in the fluid discharge hole 7, the fluid discharge hole 7 may have a gentle angle in the rotation direction or the outer diameter direction of the rotating shaft 11. The seal ring 1 circulates the fluid by the above configuration to obtain a large cooling effect,
Demonstrate sufficient wear control effect.

[0009]

[Effects of the Invention] The present invention has the following effects. That is,
Since the fluid is introduced into the spiral fluid introduction groove with rotation and circulated through the fluid discharge hole, a large cooling effect is obtained and a sufficient wear suppressing effect is exhibited. In particular, since a projection for guiding the fluid to the fluid introduction groove is provided on the inner diameter surface, a large amount of fluid is circulated, and a greater cooling effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a partial perspective view of a seal ring according to an embodiment of the present invention as viewed from an oblique outer peripheral side.

FIG. 2 is a partial front view of the seal ring viewed from an axial direction.

FIG. 3 is a partially developed view of the mounted state of the seal ring viewed from an inner peripheral side.

FIG. 4 is a partial perspective view of the seal ring as viewed from an oblique inner peripheral side.

FIG. 5 is a cross-sectional view of a mounted state of a seal ring according to a conventional example.

FIG. 6 is a cross-sectional view of a mounted state of a seal ring according to another conventional example.

FIG. 7 is a partial perspective view of the seal ring as viewed from an oblique outer peripheral side.

FIG. 8 is a partial perspective view of a seal ring according to another conventional example viewed from an oblique outer peripheral side.

FIG. 9 is a partial front view of the seal ring viewed from an axial direction.

FIG. 10 is a partially developed view of the mounted state of the seal ring viewed from the outer peripheral side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seal ring 2 Outer diameter surface 3 One end surface in the axial direction 4 Inner diameter surface 5 The other end surface in the axial direction 6 Fluid introduction groove 7 Fluid discharge hole 8 Projection 11 Rotary shaft 12 Mounting groove 13 Side wall 14 Housing 15 Inner wall

Claims (1)

(57) [Scope of request for utility model registration] A mounting groove (1) provided around a rotating shaft (11).
2), the outer diameter surface (2) is connected to the rotating shaft (11).
If you slidably contact the inner wall of the inserted housing
The one end face (3) in the axial direction is connected to one of the mounting grooves (12).
A seal ring slidably contacting the side wall (13).
It, exhibits a rectangular cross section, the axial end surface (3) and the inner diameter surface spiral fluid introduction groove which is open to (4) (6) is provided,
From the outer diameter end of the fluid introduction groove (6) to the other axial end surface (5)
A seal hole provided with a fluid discharge hole (7) and a projection (8) for guiding fluid to the fluid introduction groove (6) on the inner diameter surface (4).