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Sealing device

A technology of a sealing device and a sealing ring, which is applied in the directions of engine sealing, mechanical equipment, engine components, etc., can solve the problems such as the damage of the first gasket 21, and achieve the effect of restraining the damage.

Active Publication Date: 2018-07-17
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In this way, the first washer 21 is continuously inserted in a state where the diameter of the first washer 21 is expanded and deformed. Therefore, the outer peripheral portion of the first washer 21 interferes with the opening peripheral portion 52b of the shaft hole 52a, and the first washer 21 may be damaged.

Method used

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Embodiment Construction

[0039] The present invention includes the following embodiments.

[0040] (1) For high-pressure applications, there are gaskets for general-purpose rectangular grooves. The washer is composed of a hard washer (first washer) and a soft washer (second washer).

[0041] (2) The soft gasket is installed on the non-pressurized side without clearance. The hard gasket is set smaller than the inner diameter of the subject-side housing (another component) so that insertion is not disturbed. That is, the soft washer is provided without a gap from the side of the groove, and in this state, a hard washer having an outer diameter smaller than the inner diameter of the housing can be attached. That is, by providing a portion in parallel contact with the side of the groove, the soft washer does not move during installation (insertion), so the hard washer is not pushed upward and diameter expansion does not occur.

[0042] (3) The joint surfaces of the hard washer and the soft washer are a...

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Abstract

A sealing device comprises a combination of a sealing ring fitted into a fitting groove having a rectangular cross section, a first backup ring, and a second backup ring, and addresses the problem ofsuppressing damage to the first backup ring that occurs when the first backup ring is inserted and expands diametrically. In order to suppress damage, the first backup ring is shaped so as to have anedge surface contacting the side surface on the counter-sealing fluid side of the mounting groove, a circumferential surface, and an inclined surface. The second backup ring is shaped so as to have anedge surface contacting the sealing ring, a circumferential surface facing the bottom surface of the mounting groove, and an inclined surface. A flat, axially perpendicular contact surface contactingthe side surface on the counter-sealing fluid side of the mounting groove is provided on the inner circumferential edge of the inclined surface of the second backup ring. The inner diameter of the first backup ring is configured so as to be larger than the outer diameter of the contact surface of the second backup ring, and the outer diameter of the first backup ring is configured so as to be smaller than the inner diameter of the housing.

Description

technical field [0001] The invention relates to a sealing device related to sealing technology. The sealing device of the present invention is particularly suitable as a high-pressure seal for sealing a high-pressure sealing fluid. Background technique [0002] Currently, as seals for high pressure, known figure 2 Sealing device 1 shown. The sealing device 1 is disposed between two opposing parts 51, 52, and seals in such a way that the sealing fluid on the high pressure side H does not leak to the low pressure side L. The sealing device 1 is composed of the following components: a sealing ring 11. It is installed in the annular installation groove 53 of one of the two parts 51, 52 (such as the shaft) 51, and is in close contact with the other part (such as the housing) 52; the relatively hard first gasket 21 is configured On the side opposite to the sealing fluid of the seal ring 11 (low-pressure side L); and a relatively soft second gasket 31 is arranged between the sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/46F16J15/10
CPCF16J15/104F16J15/166F16J15/48F16J15/125F16J15/3268F16J15/46
Inventor 义经修司边见耕太
Owner NOK CORP