CN213711868U - Sealing device and sealing structure - Google Patents
Sealing device and sealing structure Download PDFInfo
- Publication number
- CN213711868U CN213711868U CN202022138306.7U CN202022138306U CN213711868U CN 213711868 U CN213711868 U CN 213711868U CN 202022138306 U CN202022138306 U CN 202022138306U CN 213711868 U CN213711868 U CN 213711868U
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- sealing device
- seal portion
- sealing
- side seal
- surface side
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Abstract
The utility model provides a sealing device and seal structure body, it can increase the compression surplus to improve sealing performance's sealed. A sealing device (1) is an annular sealing device for sealing an installation space (20) which is an annular space formed between a housing (100) which is one member and a housing (200) which is the other member, wherein the housing (100) has a groove (101) which is open on the inner peripheral side or the outer peripheral side of a pair of side surfaces, and the housing (200) has an opposite surface (201) which is opposite to the bottom surface (102) of the groove (101). The sealing device (1) is provided with a bottom surface side sealing part (2) extending along the bottom surface (102) and an opposite surface side sealing part (3) protruding from the bottom surface side sealing part (2) towards the opposite surface (201). The facing surface side seal (3) extends along a side surface (103) of the groove (101) that is not open, and has a radial dimension that is smaller than the radial dimension of the bottom surface side seal (2).
Description
Technical Field
The present invention relates to a sealing device and a sealing structure, and more particularly to a sealing device and a sealing structure that perform static sealing.
Background
Currently, as a sealing device, the following gaskets are known: the sealing member is attached to an annular space such as an annular groove formed between a plurality of members, such as a housing (housing), a cover (cover), and a pipe, which are immovable relative to each other and face each other, and seals a gap between the members. As such a conventional gasket, the following gasket is proposed: is mounted in a groove of one of the 2 members, and is compressed between the 2 members, thereby sealing a gap between the 2 members (for example, see patent document 1).
The gasket described in patent document 1 has an arc-shaped portion that protrudes toward the bottom surface of the groove and the surface of the other member, and a constricted portion that faces the side surface of the groove, and the curvature of the arc-shaped portion is smaller than the curvature of a circle having the same height as the entire gasket. Thus, even if the compression amount is the same for a gasket having a circular cross section, the width of the region in contact with 2 members can be increased, and the sealing performance can be improved.
Documents of the prior art
Patent document
Patent document 1: JP 2011-94667A.
SUMMERY OF THE UTILITY MODEL
A sealing device such as a gasket is provided not only in a groove having both closed side surfaces (i.e., having both an inner peripheral surface and an outer peripheral surface) as described in patent document 1, but also in a groove having one of a pair of side surfaces open (i.e., not having an inner peripheral surface or an outer peripheral surface). In such a configuration, the sealing performance of the sealing device is improved by increasing the compression margin.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a sealing device and a sealing structure that can improve sealing performance by increasing a compression margin.
In order to achieve the above object, a sealing device according to the present invention is an annular sealing device for sealing an annular space formed between one member having a groove portion opened on an inner peripheral side or an outer peripheral side out of a pair of side surfaces and another member having an opposite surface opposed to a bottom surface of the groove portion, the sealing device including: a bottom side seal portion extending along the bottom surface; and an opposite surface side seal portion that protrudes from the bottom surface side seal portion toward the opposite surface, the opposite surface side seal portion extending along a side surface of the groove portion that is not an open side, and having a radial dimension smaller than a radial dimension of the bottom surface side seal portion.
In the sealing device according to an embodiment of the present invention, the bottom surface side seal portion has a flat surface that contacts the bottom surface.
In the sealing device according to an aspect of the present invention, a tapered surface having an outer diameter that increases toward the facing surface side is formed between the surface of the bottom surface side seal portion on the bottom surface side and the surface of the facing surface side seal portion on the non-open side.
In order to achieve the above object, a seal structure according to the present invention includes an installation space and a seal device for sealing the installation space, wherein the installation space is an annular space formed between one member and another member, the one member has a groove portion opened to an inner peripheral side or an outer peripheral side as an opening side, the other member has an opposed surface opposed to a bottom surface of the groove portion, the seal device is the above seal device, and the opposed surface side seal portion is brought into contact with the opposed surface by the bottom surface side seal portion being brought into contact with the bottom surface, thereby sealing the installation space.
In the seal structure according to an embodiment of the present invention, in the mounting space, a value obtained by dividing a depth of the groove portion by a width is 0.55 or more.
According to the utility model relates to a sealing device and seal structure body can increase the compression allowance and improve sealing performance.
Drawings
Fig. 1 is a cross-sectional view of a sealing device according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view showing a state in which the sealing device according to the embodiment of the present invention is compressed.
Fig. 3 is a cross-sectional view showing a sealing device according to a first modification of the present invention.
Fig. 4 is a cross-sectional view showing a sealing device according to a second modification of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Fig. 1 is a cross-sectional view of a sealing device 1 according to an embodiment of the present invention. Fig. 2 is a sectional view showing a state in which the sealing device 1 is compressed. That is, the sealing device 1 is compressed by the housing 100 and the housing 200 described later, and fig. 1 shows a state before compression (natural state), and fig. 2 shows a state after compression.
Hereinafter, for convenience of explanation, the direction of arrow a (see fig. 1) in the axis x direction is referred to as an upper side, and the direction of arrow b (see fig. 1) in the axis x direction is referred to as a lower side. In a direction perpendicular to the axis x (hereinafter, also referred to as "radial direction"), a direction away from the axis x (direction of arrow c in fig. 1) is an outer peripheral side, and a direction toward the axis x (direction of arrow d in fig. 1) is an inner peripheral side.
As shown in fig. 1 and 2, a sealing device 1 according to an embodiment of the present invention is an annular sealing device for sealing a mounting space 20 which is an annular space formed between a casing 100 which is one member and a casing 200 which is the other member, the casing 100 having a groove 101 which is open on the inner periphery side or the outer periphery side of a pair of side surfaces, and the casing 200 having an opposing surface 201 which opposes a bottom surface 102 of the groove 101. The sealing device 1 includes: a bottom surface side seal portion 2 extending along the bottom surface 102, and an opposite surface side seal portion 3 protruding from the bottom surface side seal portion 2 toward the opposite surface 201. The facing-surface-side seal portion 3 extends along the side surface 103 of the groove portion 101 which is not on the open side, and has a radial dimension smaller than that of the bottom-surface-side seal portion 2. The sealing device 1 will be specifically described below.
The sealing device 1 is formed in an annular or substantially annular shape around an axis x, is attached to a groove 101 of a housing 100 as one member, and is formed such that: the bottom surface 102 of the groove 101 is in contact with the lower side in the x-axis direction, and the side surface 103 of the groove 101 is in contact with the outer peripheral side. The housing 200 as another member is opposed to the bottom surface 102 of the groove 101 at the opposed surface 201, and the sealing device 1 is formed so as to be in contact with the opposed surface 201 on the upper side in the axis x direction. The inner peripheral side of the groove 101 of the housing 100 is open as an open side, and the outer peripheral side opposite thereto is closed by a side surface 103 as a non-open side (closed side).
The sealing device 1 is made of an elastic member such as rubber or elastic resin, and integrally includes a bottom surface side sealing portion 2 and an opposite surface side sealing portion 3. The bottom surface side seal portion 2 is formed in a ring shape extending along a plane orthogonal or substantially orthogonal to the axis x direction. That is, the bottom surface side seal portion 2 extends along the bottom surface 102 of the groove portion 101, and the flat surface 21 as the lower surface thereof contacts the bottom surface 102. The bottom surface side seal portion 2 has an inner peripheral surface 22 having a semicircular cross section and an outer peripheral surface 23 extending in the axis x direction. The outer peripheral surface 23 contacts the side surface 103 of the groove 101. The corner 24 between the flat surface 21 and the outer peripheral surface 23 may have a shape that contacts the corner 104 between the bottom surface 102 and the side surface 103 of the groove 101 without a gap, and may have a tapered shape, for example.
The opposite-surface-side seal portion 3 protrudes upward in the axis x direction from an end portion on the outer peripheral side (non-open side) of the bottom-surface-side seal portion 2, and is formed in a tubular shape extending in the axis x direction. The facing-surface-side sealing portion 3 has a contact portion 31 having an arc-shaped cross section on the upper surface thereof, and contacts the facing surface 201 at the contact portion 31. The opposite-surface-side sealing portion 3 has an inner circumferential surface 32 and an outer circumferential surface 33 extending in the axis x direction. The inner peripheral surface 32 is located on the outer peripheral side with respect to the apex of the inner peripheral surface 22 of the bottom surface side seal portion 2. The outer peripheral surface 33 is continuous with the outer peripheral surface 23 of the bottom surface side seal portion 2.
Since the inner circumferential surface 22 and the outer circumferential surface 23 of the bottom surface side seal portion 2 have the above-described relationship with the inner circumferential surface 32 and the outer circumferential surface 33 of the opposite surface side seal portion 3, the radial dimension of the opposite surface side seal portion 3 is smaller than the radial dimension of the bottom surface side seal portion 2. The sealing device 1 has an L-shaped cross-sectional shape.
Next, a compressed state and a usage state of the sealing device 1 will be described. The sealing device 1 forms a seal structure 10, and is attached to an attachment space 20 included in the seal structure 10 to be used.
The seal structure 10 includes an installation space 20 and a sealing device 1 for sealing the installation space 20, the installation space 20 is an annular space formed between a housing 100 as one member and a housing 200 as another member, the housing 100 has a groove 101 opened with an inner circumferential side or an outer circumferential side of side surfaces as an opening side, and the housing 200 has an opposed surface 201 opposed to a bottom surface 102 of the groove 101. The bottom-surface-side seal portion 2 is in contact with the bottom surface 102, and the opposite-surface-side seal portion 3 is in contact with the opposite surface 201, thereby sealing the installation space 20. The sealing device 1 provided in the seal structure 10 will be specifically described below.
First, before assembling the case 100 and the case 200, the sealing device 1 is disposed along the bottom surface 102 and the side surface 103 of the groove 101. That is, the flat surface 21 of the bottom-side seal portion 2 is brought into contact with the bottom surface 102, the outer peripheral surface 23 of the bottom-side seal portion 2 and the outer peripheral surface 33 of the opposite-surface-side seal portion 3 are brought into contact with the side surface 103, and the corner portion 24 is brought into contact with the corner portion 104.
In this state, the housing 100 and the housing 200 are relatively close to each other in the axis x direction so that the bottom surface 102 and the facing surface 201 are close to each other. Thereby, as shown in fig. 2, the sealing device 1 is compressed in the axis x direction and deformed so that the radial dimension increases. At this time, since the radial dimension of the facing surface side seal portion 3 is smaller than the radial dimension of the bottom surface side seal portion 2, the facing surface side seal portion 3 is more easily deformed than the bottom surface side seal portion 2. That is, the sealing device 1 includes both the facing-surface-side sealing portion 3 that is relatively easily deformed and has a large compression margin, and the bottom-surface-side sealing portion 2 that is relatively hardly deformed and has a small compression margin.
As described above, when the sealing device 1 is compressed, the inner peripheral surface 22 of the bottom surface side seal portion 2 may be slightly deformed upward as shown in the drawing, or may not be deformed as described above. In a state where the case 100 and the case 200 are assembled in proximity to each other, the bottom surface side seal portion 2 is spaced apart from the facing surface 201.
In a state where the casing 100 and the casing 200 are assembled in close proximity to each other, a value obtained by dividing a depth, which is a distance between the bottom surface 102 and the facing surface 201, by a radial dimension of the bottom surface side seal portion 2 after compression is 0.55 or more.
As described above, since the sealing device 1 includes the opposite surface side sealing portion 3 having a large compression margin, the compression margin of the entire sealing device 1 is secured against the compression in the axis x direction. On the other hand, in the sealing device having a rectangular cross section, only the radial dimension is reduced, and although deformation is easy and a compression margin can be secured against compression in the axial direction, the sealing device is likely to fall down. In the sealing device 1, the bottom surface side sealing portion 2 extending along the bottom surface 102 and being less likely to deform is provided, so that it is possible to suppress a situation in which the sealing device falls down against compression in the axis x direction. That is, the sealing device 1 can secure a compression margin while suppressing undesired deformation.
Thus, according to the sealing device 1 of the embodiment of the present invention, the radial dimension of the facing surface side seal portion 3 is made smaller than the radial dimension of the bottom surface side seal portion 2, whereby a compression margin can be secured, and the sealing performance can be improved.
Further, by providing the bottom surface side seal portion 2 with the flat surface 21 that contacts the bottom surface 102, the contact area therebetween can be ensured, and the seal device 1 can be prevented from falling down.
The present invention is not limited to the above-described embodiments, and includes other configurations that can achieve the object of the present invention, and modifications and the like described below are also included in the present invention. For example, in the above embodiment, the corner portion 24 between the flat surface 21 and the outer peripheral surface 23 of the bottom surface side sealing portion 2 is in contact with the corner portion 104 between the bottom surface 102 and the side surface 103 of the groove portion 101 without a gap. For example, as shown in fig. 3, in a sealing device 1B according to a first modification example, a tapered surface 4 that is inclined (has a larger outer diameter) toward the outer peripheral side, which is the non-open side, may be formed between the flat surface 21 of the bottom surface side sealing portion 2 and the outer peripheral surface 33 of the opposite surface side sealing portion 3 so as to face the opposite surface 201 side. That is, when the flat surface 21 is brought into contact with the bottom surface 102 and the outer peripheral surface 33 is brought into contact with the side surface 103, a gap is formed between the corner portion 104 and the tapered surface 4.
According to the sealing device 1B of the modification described above, when compressed by the housing 100 and the housing 200, it can be deformed to fill the gap between the corner portion 104 and the tapered surface 4, and the compression margin can be further increased.
In the above embodiment, the bottom surface side seal portion 2 has the flat surface 21 that contacts the bottom surface 102, but the surface of the bottom surface side seal portion that contacts the bottom surface 102 may not be flat. For example, as a second modification, in the sealing device 1C shown in fig. 4, the concave portion 251 may be formed in the surface 25 on the bottom surface 102 side of the bottom surface side sealing portion 2. When the sealing device 1C is disposed in the groove 101, a gap is formed between the concave portion 251 and the bottom surface 102. Further, on both side portions of the concave portion 251 in the radial direction of the surface 25, convex portions 252 and 253 are formed so as to protrude toward the bottom surface 102.
According to the sealing device 1C of the modified example, when compressed by the housing 100 and the housing 200, the sealing device can be deformed to fill the gap between the bottom surface 102 and the recess 251, and the compression margin can be further increased.
In the above embodiment, in the assembled state in which the case 100 and the case 200 are assembled in close proximity to each other, the value obtained by dividing the depth, which is the distance between the bottom surface 102 and the opposing surface 201, by the radial dimension of the bottom surface side seal portion 2 after compression is 0.55 or more, but the relationship between the depth and the radial dimension of the bottom surface side seal portion 2 may be set as appropriate.
In the above embodiment, the sealing device 1 is provided so that the inner peripheral side of the housing 100 as one member is open, but an annular space may be formed by one member having an outer peripheral side as an open side, and the sealing device may be provided so as to seal the space. That is, when the groove portion has a side surface on the inner peripheral side, a sealing device in which the facing-surface-side sealing portion extends along the side surface on the inner peripheral side may be used as the sealing device.
Although the embodiments of the present invention have been described above, the present invention is not limited to the sealing device according to the embodiments of the present invention, and includes all embodiments encompassed by the inventive concept and the claims of the present invention. Further, the respective configurations can be appropriately and selectively combined to achieve at least part of the above-described problems and effects. For example, the shape, material, arrangement, size, and the like of each component in the above embodiments may be appropriately changed based on the specific use form of the present invention.
Description of the symbols
1. 1B, 1C … sealing device, 2 … bottom side sealing portion, 21 … flat surface, 22 … inner peripheral surface, 23 … outer peripheral surface, 24 … corner, 25 … surface, 251 … concave portion, 252, 253 … convex portion, 3 … facing surface side sealing portion, 31 … contact portion, 32 … inner peripheral surface, 33 … outer peripheral surface, 4 … tapered surface, 10 … sealing structure, 20 … mounting space, 100 … case (one member), 101 … groove portion, 102 … bottom surface, 103 … side surface, 104 … corner portion, 200 … case (another member), 201 … facing surface.
Claims (6)
1. A seal device for sealing an annular space formed between one member having a groove portion opened on an inner peripheral side or an outer peripheral side of a pair of side surfaces and another member having an opposing surface opposing a bottom surface of the groove portion, the seal device comprising:
a bottom side seal portion extending along the bottom surface; and
an opposite surface side seal portion protruding from the bottom surface side seal portion toward the opposite surface,
the facing surface side seal portion extends along a side surface of the groove portion that is not an open side, and has a radial dimension smaller than that of the bottom surface side seal portion.
2. The sealing device of claim 1,
the bottom surface side seal portion has a flat surface that contacts the bottom surface.
3. The sealing device of claim 1,
a tapered surface that is inclined toward the non-open side as it goes toward the facing surface side is formed between the bottom surface side surface of the bottom surface side seal portion and the non-open side surface of the facing surface side seal portion.
4. The sealing device of claim 1,
a concave portion is formed in the surface of the bottom surface side seal portion on the bottom surface side.
5. A seal structure including an installation space which is an annular space formed between one member having a groove portion opened with an inner peripheral side or an outer peripheral side being an open side and another member having an opposed surface opposed to a bottom surface of the groove portion, and a sealing device for sealing the installation space,
the sealing device according to any one of claims 1 to 4,
the bottom surface side seal portion is brought into contact with the bottom surface, and the opposite surface side seal portion is brought into contact with the opposite surface, whereby the installation space is sealed.
6. The seal structure according to claim 5,
a value obtained by dividing a depth, which is a distance between the bottom surface and the facing surface, by a radial dimension of the bottom surface side seal portion after compression is 0.55 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022138306.7U CN213711868U (en) | 2020-09-25 | 2020-09-25 | Sealing device and sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022138306.7U CN213711868U (en) | 2020-09-25 | 2020-09-25 | Sealing device and sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213711868U true CN213711868U (en) | 2021-07-16 |
Family
ID=76795502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022138306.7U Expired - Fee Related CN213711868U (en) | 2020-09-25 | 2020-09-25 | Sealing device and sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213711868U (en) |
-
2020
- 2020-09-25 CN CN202022138306.7U patent/CN213711868U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210716 |