JP2019108898A - Seal device - Google Patents

Abstract

To effectively seal sealed fluids and prevent wrong assembly, in a seal device for simultaneously sealing a plurality of kinds of sealed fluids.SOLUTION: A seal member 31 integrally has a seal portion 32 on one side composed of a material having durability to one of sealed fluids existing in one space A, and disposed while facing one of the sealed fluids in a mounting groove 12, and a seal portion 33 on the other side composed of a material having durability to the other sealed fluid existing in another space B and disposed while facing the other sealed fluid in the mounting groove 12. A wire diameter dof the one seal portion 32 is larger than a wire diameter dof the other seal portion 33, and an inner diameter Dof the one seal portion 32 is smaller than an inner diameter Dof the other seal portion 33. A step portion 13 is formed on a groove bottom surface of the mounting groove 12 so that a groove depth tat a region 14 at which the one seal portion is mounted is larger than a groove depth tat a region 15 at which the other seal portion is mounted.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sealing device according to sealing technology. The sealing device of the present invention is used, for example, as a seal for an engine.

  For example, a sealing device used for a vehicle engine such as a car is often a combination of engine oil and air or a combination of cooling water and air as a sealing object (sealing fluid).

  Generally, when the object to be sealed is a combination of engine oil and air, ACM rubber excellent in oil resistance is often applied as the material of the sealing device (seal member), and in the case of a combination of cooling water and air, the sealing device As a material of (seal member), EPDM rubber excellent in water resistance is often applied.

  When the object to be sealed is a combination of engine oil and cooling water, FCM rubber is often used because ACM rubber does not have water resistance and EPDM rubber does not have oil resistance.

  However, since the application of FKM rubber increases the material cost, the market often requires the application of materials other than FKM rubber.

  Therefore, as shown in FIG. 3, it is conceivable to use a seal member (O ring) 51 made of ACM rubber and a seal member (O ring) 52 made of EPDM rubber in combination (using two O rings).

JP 2004-116312 A JP 2001-4251 A

  However, when the seal member 51 made of ACM rubber and the seal member 52 made of EPDM rubber are used in combination, the dimensions of both seal members 51 and 52 are the same or similar. , 52 may be assembled in the opposite position (where the seal member 51 made of ACM rubber should be mounted facing the engine oil a and the seal member 52 made of EPDM rubber should be mounted facing the cooling water b) On the contrary, there is a concern that the seal member 52 made of EPDM rubber is assembled facing the engine oil a and the seal member 51 made of ACM rubber is mounted facing the cooling water b).

  In addition, in order to prevent such erroneous assembly, it is conceivable to change the color of one of the seal members 51 (or 52) from black rubber to color rubber, according to which both rings 51, 52 Since the colors are different, incorrect assembly can be prevented.

  However, when changing the color of one of the seal members 51 (or 52) from black rubber to color rubber as described above, a white-based filler is used as the filler, and the white-based filler is used. There is a concern that the strength of the material may be reduced as compared to the black filler.

  In view of the above, the present invention is capable of effectively sealing each sealing fluid in a sealing device that simultaneously seals a plurality of types of sealing fluids (in the above example, engine oil and cooling water) It is an object of the present invention to provide a sealing device capable of preventing sticking.

  In order to solve the above problems, the sealing device of the present invention has a mounting groove provided in one of two members facing each other, and a sealing member mounted in the mounting groove and in close contact with the other member. The sealing member is made of a material having resistance to one sealing fluid existing in one of two spaces partitioned by the sealing member and facing the one sealing fluid in the mounting groove It is made of a material having resistance to one sealing portion disposed and the other sealing fluid existing in the other of the two spaces partitioned by the sealing member, and faces the other sealing fluid in the mounting groove. And the other seal portion to be disposed separately, and the seal member forms the seal height of the one seal portion larger than the seal height of the other seal portion. At the same time, the mounting groove has a shape in which the inside diameter of the one sealing portion is smaller than the inside diameter of the other sealing portion, and the mounting groove mounts the one sealing portion by providing a step on the bottom surface of the groove. It is characterized in that the groove depth at the portion is formed to be larger than the groove depth at the portion where the other seal portion is attached.

  As an embodiment, in the sealing device described above, the sealing device is a sealing device used for a vehicle engine, the one sealing fluid is an engine oil, and the one sealing portion is an engine oil The other seal fluid is cooling water, and the other seal portion is made of EPDM rubber as a material having resistance to cooling water.

  In the present invention, one sealing fluid of a plurality of types of sealing fluids is sealed by one seal portion made of a material having resistance to the one sealing fluid, and the other sealing fluid is made resistant to the other sealing fluid. Each of the sealing fluids can be effectively sealed in order to seal at the other seal portion made of the material provided.

  Further, as the shape of the seal member, the seal height of one seal portion is set larger than the seal height of the other seal portion, and the inner diameter of one seal portion is smaller than the inner diameter of the other seal portion. As the groove shape, the groove depth at the portion to which one seal portion is attached is formed larger than the groove depth at the portion to which the other seal portion is attached, so one seal portion and the other seal portion are assembled at opposite positions If this happens, a phenomenon occurs in which the seal member does not fit in the mounting groove. Accordingly, since it is noticed that the seal member is about to be misassembled by the occurrence of the phenomenon that the seal member does not fit in the mounting groove, the error can be corrected and the misassembly can be prevented.

  Further, in the present invention, since one seal portion and the other seal portion are integrated by a method such as two-color molding, the handling thereof is convenient.

Cross-sectional view of a sealing device according to an embodiment of the present invention Sectional drawing which shows the assembly process of the same sealing device Cross section of sealing device according to prior art

  As shown in FIG. 1, the sealing device according to the embodiment has an annular mounting groove provided on the outer peripheral surface of one member (inner peripheral side member) 11 of the two members 11 and 21 facing each other in the radial direction. Two spaces A separated by the seal member 31 and having an annular seal member 31 attached to the mounting groove 12 and in close contact with the inner peripheral surface of the other member (the outer peripheral side member) 21. , And B so that one sealing fluid present in one of the spaces A does not leak to the other space B, and at the same time, the other of the two spaces A, B divided in the axial direction by the sealing member 31 It exerts a sealing function to seal the other sealing fluid present in the space B of the above so that it does not leak to the one space A. The sealing device is also called a two-component seal because of its function.

  The seal member 31 integrally has one seal portion 32 and the other seal portion 33.

  Among them, one seal portion 32 is formed of a material having resistance to one sealing fluid existing in one of the two spaces A and B which is axially partitioned by the seal member 31, and is mounted. The groove 12 is disposed on one space A side so as to face one sealing fluid A.

  The other seal portion 33 is formed of a material having resistance to the other sealing fluid existing in the other space B of the two spaces A and B which are axially partitioned by the seal member 31. And the other space B side so as to face the other sealing fluid.

  The two seal parts 32 and 33 are integrated by two-color molding, adhesion after individual molding, and the like, and both the seal parts 32 and 33 are juxtaposed side by side in the axial direction.

Further, in the sealing member 31, one of the sealing portion 32, the seal height (diameter) seal height d ₁ other seal portion 33 (diameter) while being larger than d ₂ (d ₁ > _d 2), it is formed smaller than the inner diameter _{D 2} of the other sealing portion 33 and the inner diameter _{D 1 (D 1 <D 2} ). Outer diameter _{D 3} of the one sealing portion 32 is formed in the same or substantially equal to the outer diameter _{D 4} of the other of the sealing portion _{33 (D 3 = D 4,} D 3 ≒ D 4). The cross-sectional shapes of the two seal portions 32 and 33 are respectively circular, but are not limited to circular and may be, for example, other cross-sectional shapes such as an oval shape. Moreover, the seal parts 32 and 33 may be provided with a seal lip (not shown).

Mounting groove 12 is its cross-sectional shape as the rectangular, by providing the annular step portion 13 to the groove bottom surface and the other sealing portion 33 of the groove depth t ₁ at the site 14 for attaching one of the sealing portion 32 It is formed in the larger shape than the groove depth _{t 2} at the site 15 for attaching _{(t 1>} t 2). The site 14 to which one seal portion 32 is attached is an area on one space A side, and the site 15 to which the other seal portion 33 is attached is an area on the other space B side.

  Specifically, the sealing device according to the embodiment is a sealing device used for a vehicle engine. One sealing fluid is an engine oil, and correspondingly, one sealing portion 32 is formed of ACM rubber as a material having resistance to engine oil. On the other hand, the other sealing fluid is cooling water, and correspondingly, the other seal portion 33 is formed of EPDM rubber as a material having resistance to the cooling water.

  In the sealing device having the above configuration, the seal member 31 integrally has one seal portion 32 and the other seal portion 33, and one sealing fluid (engine oil) is a material having resistance to the one sealing fluid ( In order to seal with one seal portion 32 made of ACM rubber) and the other seal fluid (cooling water) with the other seal portion 33 made of a material (EPDM rubber) having resistance to the other seal fluid, One sealing fluid (engine oil) and the other sealing fluid (cooling water) can each be effectively sealed.

Further, as the shape of the sealing member 31, one of the seal portions 32 seal height d ₁ and the other of the sealing portion 33 seals one of the sealing portion 32 with larger form than the height d ₂ of the inner diameter D ₁ other is formed smaller than the inner diameter D ₂ of the sealing portion 33, as the shape of the mounting groove 12, the groove depth at the site 15 for attaching the other of the sealing portion 33 the groove depth t ₁ at the site 14 for attaching one of the sealing portion 32 because of the larger than the t _2, event one of the sealing portion 32 and the other seal portion 33 as shown in FIG. 2 when you Kumitsukeyo in axially opposite positions, the seal member 31 mounting groove 12 A phenomenon occurs in which the seal member 31 can not be incorporated into the inner peripheral side of the other member 21 without being accommodated. Therefore, it is noticed that the seal member 31 does not fit in the mounting groove 12 and the seal member 31 can not be incorporated into the inner peripheral side of the other member 21 as it is trying to be misassembled. It is possible to correct an error, to prevent misassembly, and to prevent occurrence of defects such as swelling of the seal portions 32, 33 due to the misassembly or protrusion damage to the groove gap, etc. in advance.

  Further, in the sealing device having the above configuration, since one seal portion 32 and the other seal portion 33 are integrated by two-color molding, adhesion after individual molding, or the like, both the seal portions 32 and 33 It can be handled as a seal part. Therefore, compared with the case where both seal parts 32 and 33 are treated as separate seal parts, handling can be improved.

11 One Member 12 Mounting Groove 13 Stepped Part 14 One Part Attaching the Sealed Part 15 Part Attaching the Other Sealed Part 21 Other Member 31 Sealing Member 32 One Sealed Part 33 Other Sealed Part

Claims (2)

A mounting groove provided in one of two members facing each other, and a seal member mounted in the mounting groove and in close contact with the other member;
The sealing member is made of a material having resistance to one sealing fluid existing in one of two spaces partitioned by the sealing member, and is disposed facing the one sealing fluid in the mounting groove. And a material having resistance to the other sealing fluid existing in the other of the two spaces partitioned by the sealing member and the other sealing fluid, and facing the other sealing fluid in the mounting groove Integrally with the other seal part to be disposed,
The seal member has a shape in which the seal height of the one seal portion is larger than the seal height of the other seal portion and the inner diameter of the one seal portion is smaller than the inner diameter of the other seal portion. Have
The mounting groove has a stepped portion on the bottom surface of the groove, so that the groove depth at the portion where the one seal portion is mounted is formed larger than the groove depth at the portion where the other seal portion is mounted. A sealing device characterized by In the sealing device according to claim 1,
The sealing device is a sealing device used for a vehicle engine,
The one sealing fluid is engine oil,
The one seal portion is made of ACM rubber as a material having resistance to engine oil,
The other sealed fluid is cooling water,
A sealing device characterized in that the other seal portion is made of EPDM rubber as a material having resistance to cooling water.

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