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 reducin

Method used

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Examples

Experimental program
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Effect test

Example Embodiment

[0049] (Example 1)

[0050] Reference Figure 1 ~ Figure 12 The seal ring of the embodiment of the present invention will be described. figure 1 It is a side view of the sealing ring of Embodiment 1 of the present invention. In addition, figure 1 Indicates the side surface opposite to the sliding surface in the seal ring. figure 2 This is a view of the seal ring of 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 Embodiment 1 of the present invention. In addition, image 3 Indicates the side surface on the sliding surface side of the seal ring. Figure 4 It is a partial enlarged view of the side view of the sealing ring of Example 1 of the present invention. In addition, Figure 4 For magnification image 3 A diagram of the vicinity of the seam 110 is provided in. Figure 5 It is a schematic cross-sectional view of the sealing ring of Embodiment 1 of the present invention. In addition, Figure 5 ...

Example Embodiment

[0068] (Example 2)

[0069] Figure 13 ~ Figure 19 This shows the second embodiment of the present invention, and shows the structure in the following case, that is, in this embodiment, the depth of the connecting portion with 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 depth is the same, and is deeper than the depth except for the part connected with the second groove in the first groove. Since the other structures and functions are the same as those of the first embodiment, the same symbols are assigned to the same structural parts, and the description thereof is omitted.

[0070] Figure 13 This is a partial enlarged view of the side view of the sealing ring of Example 2 of the present invention, and is equivalent to that in Example 1 above Figure 4 Figure. Figure 14 ~ Figure 19 It is a schematic cross-sectional view of the sealing ring involved in Embodiment 2 of the present inv...

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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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