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Seal ring

A sealing ring and side wall surface technology, which is applied in the field of sealing rings, can solve the problems of reducing rotation torque and achieve the effect of suppressing leakage

Inactive Publication Date: 2016-08-31
NOK CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there is still room for improvement, such as reducing the rotational torque regardless of the direction of rotation, etc.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0050] refer to Figure 1 to Figure 12 A seal ring according to an embodiment of the present invention will be described. figure 1 It is a side view of the sealing ring of Example 1 of the present invention. also, figure 1 Indicates the side surface opposite to the sliding surface in the seal. figure 2 This is a view of the seal ring according to Example 1 of the present invention viewed from the outer peripheral surface side. image 3 It is a side view of the sealing ring of Example 1 of the present invention. also, image 3 Indicates the side surface on the sliding surface side of the seal. Figure 4 It is a partial enlarged view of the side view of the seal ring in Embodiment 1 of the present invention. also, Figure 4 to enlarge image 3 A figure in the vicinity of the seam portion 110 is provided in . Figure 5 It is a schematic cross-sectional view of the seal ring of Example 1 of the present invention. also, Figure 5 for image 3 AA sectional view in . F...

Embodiment 2

[0069] Figure 13 to Figure 19 Example 2 of the present invention is shown, and the structure in the case where, in the present example, the depth of the part connected to the second groove in the first groove of the dynamic pressure generating groove is configured to be the same as that of the second groove The depths are the same, and are deeper than the depth except for the connection portion of the first groove with the second groove. Since other structures and functions are the same as those of Embodiment 1, the same symbols are assigned to the same structural parts and their descriptions are omitted.

[0070] Figure 13 It is a partial enlarged view of the side view of the seal ring in Embodiment 2 of the present invention, and is equivalent to that in Embodiment 1 above. Figure 4 diagram. Figure 14 ~ Figure 19 It is a schematic sectional view of the sealing ring according to the second embodiment of the present invention. also, Figure 14 ~ Figure 19 for Figure...

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PUM

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Abstract

Provided is a sealing device configured so that, irrespective of a rotational direction, rotational torque can be reduced and the leakage of sealed fluid can be prevented. The seal ring is characterized in that in the seal ring (100) sliding relative to the low pressure-side sidewall surface of an annular groove, a dynamic pressure generation groove (120) is formed in the slide surface which slides relative to the sidewall surface, the dynamic pressure generation groove (120) comprises a first groove (121) circumferentially extending with a constant radial width and a second groove (122) extending from the circumferential center of the first groove (121) up to the inner peripheral surface thereof and conducting sealed fluid into the first groove (121), and the first groove (121) is provided at a position within a slide region sliding relative to the sidewall surface.

Description

technical field [0001] The invention relates to a sealing ring for sealing an annular gap between a shaft and a shaft hole of a casing. Background technique [0002] Automatic transmissions (AT) and continuously variable transmissions (CVT) for automobiles are provided with sealing rings for sealing the annular gap between the relatively rotating shaft and the housing so as to maintain oil pressure. In recent years, reduction of fuel consumption has been promoted as a countermeasure against environmental problems, and therefore the above-mentioned seal ring is required to reduce the rotational torque. Conventionally, there is known a technique in which a groove for guiding a fluid to be sealed is provided on the sliding surface side of the seal ring. (Refer to Patent Document 1 and Patent Document 2) [0003] However, there is still room for improvement. For example, it is desirable to reduce the rotational torque regardless of the direction of rotation. In addition, the ...

Claims

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Application Information

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IPC IPC(8): F16J15/18
CPCF16J15/164F16J15/3272F16J15/441Y10S277/91
Inventor 关真利细江猛井上秀行德永雄一郎
Owner NOK CORP
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