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Seal ring

A sealing ring, circumferential direction technology, used in engine sealing, components with teeth, transmission control and other directions, can solve problems such as oil leakage, leakage, etc., to achieve low leakage, reduce drive loss, and reduce friction.

Active Publication Date: 2013-02-06
RIKEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the seal ring of Patent Document 1, the sliding contact between the side surface of the seal ring and the annular groove is line contact, and the sliding diameter is located on the joint gap of the seal ring, so there is a problem of oil leakage (leakage) from the joint gap.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0063] The PEEK material added with carbon fiber is used for injection molding to produce image 3 (A) The seal ring of the concave shape of the structure shown. Here, the slope angle θ of the concave portion is 16°, the depth h of the deepest slope portion 52 is 0.42 mm, and 8 concave portions are formed on the contact side surface. An inner wall with a width of 0.3 mm and a length of 10 mm on one side in the circumferential direction was provided along the inner circumferential end from the front end of each recessed portion in the circumferential direction toward the center, and an oil introduction hole with a circumferential length of 3 mm was formed in the center. It should be noted that the outer diameter (called diameter) of the seal ring is 67mm, the thickness (radial width) is 2.3mm, the width (axial width) is 2.32mm, and the interface is Image 6 The three-level ladder interface shown.

Embodiment 2）

[0065] The PEEK material added with carbon fiber is used for injection molding to produce Figure 4 (A) The seal ring of the concave shape of the structure shown. Here, eight concavities with a curvature of R40 and a depth of 0.22 mm at the deepest part were formed. An inner wall with a width of 0.3 mm and a circumferential length of 10 mm on one side was provided along the inner peripheral end from both sides of each recessed portion toward the center, and an oil introduction hole with a circumferential length of 3 mm was formed in the center. It should be noted that the outer diameter (called diameter) of the seal ring is 67mm, the thickness (radial width) is 2.3mm, the width (axial width) is 2.32mm, and the interface is Image 6 The three-level ladder interface shown.

Embodiment 3）

[0067] The PEEK material added with carbon fiber is used for injection molding to produce Figure 5 (A) The seal ring of the concave shape of the structure shown. Here, 8 recesses with a curvature of R100 of the throttle and a depth of 0.15 mm at the deepest part were formed. An inner wall with a width of 0.3 mm and a length of 20 mm in the circumferential direction was provided along the inner peripheral end from the opposite side of the rotation direction of each recess, and an oil introduction hole with a length of 2 mm in the circumferential direction was formed on the rotation direction side. It should be noted that the outer diameter (called diameter) of the seal ring is 67mm, the thickness (radial width) is 2.3mm, the width (axial width) is 2.32mm, and the interface is Image 6 The three-level ladder interface shown.

[0068] (Measurement of friction and oil leakage)

[0069] Such as Figure 7 As shown, the seal rings of Examples 1 to 3 were attached to a shaft groove forme...

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PUM

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Abstract

A seal ring has both low leakage characteristics and low friction characteristics to reduce the drive loss of the transmission of an automobile, thereby contributing to the improvement of fuel consumption of the automobile. A seal ring which is mounted in a shaft groove formed in the outer peripheral surface of a shaft has recesses formed in the seal ring. The recesses are disposed on the inner peripheral side of at least a contact side surface of the seal ring so as to be separated from each other in the circumferential direction. The recesses each have, formed on the inner peripheral side thereof, inners walls and an oil introduction hole which opens toward the inner peripheral surface of the recess. Such inner walls may be provided at both ends of each of the recesses in the circumferential direction, or one such inner wall may be provided only on the trailing side of the recess in the rotational direction.

Description

Technical field [0001] The present invention relates to a seal ring, in particular to a seal ring used in hydraulic equipment such as automatic transmissions of motor vehicles. Background technique [0002] In recent years, in order to increase the fuel efficiency of automobiles, it is required to reduce the driving loss of automatic transmissions. A seal ring is installed on the automatic transmission for the purpose of hydraulic sealing, but the friction loss of the seal ring causes driving loss of the automatic transmission. Therefore, the reduction of the frictional force of the seal ring becomes an important issue. In addition, the capacity of the oil pump of the automatic transmission occupies a large proportion of the driving loss. Therefore, it is desired to reduce the amount of oil leakage from the seal ring and achieve a small capacity of the oil pump. In this way, in order to reduce the driving loss of the automatic transmission and improve the fuel efficiency of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/18F16H57/029
CPCF16H61/00F16H57/0472F16H2061/0046F16J15/16F16J15/18F16J15/441F16H57/02
Inventor 永井纯也柴野知哉齐藤美香
Owner RIKEN CO LTD
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