CN219673284U - Zero damping sealing ring - Google Patents

Abstract

The utility model provides a zero damping sealing washer, includes the sealing washer body, the cross-section of sealing washer body is asymmetric V type structure, the internal face of sealing washer body is the perpendicular that can hug closely in the part surface, the external wall of sealing washer body is the inclined plane that can compression set formed seal, be equipped with the recess between internal wall and the external wall, the height of external wall is less than the height of internal wall. The utility model has good sealing performance and reduces damping.

Description

Zero damping sealing ring

Technical Field

The utility model belongs to the technical field of dynamic sealing, and particularly relates to a zero-damping sealing ring for dynamic sealing in a small-volume low-load low-damping state.

Background

At present, a common O-shaped sealing ring is also selected for dynamic sealing in the field of small volume and low load, and silica gel, nitrile rubber and the like can be selected as materials. However, the common O-shaped sealing ring is easy to generate the problem of overlarge damping or overlarge damping.

If the sealing effect is ensured, the O-ring needs to maintain enough interference, so that the problem of output is that motion damping (sliding force) is too large, and motion blockage is caused by insufficient power to match with the common O-ring in a specific small volume, so that the expected effect cannot be achieved.

If the movement effect is to be ensured, the O-ring needs to maintain a sufficiently small interference, so that the problem of yield is that the sealing effect cannot be ensured and the basic function of the sealing ring cannot be achieved.

The V-shaped sealing ring with the standard component is in the broad dynamic sealing field, but the application range of the standard V-shaped sealing ring is useful, the motion damping (sliding force) is generally large, and the small motor can not be used for driving in a specific small volume to achieve a better motion effect.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a zero-damping sealing ring with good sealing performance and reduced damping.

The technical scheme adopted by the utility model is as follows:

the utility model provides a zero damping sealing washer, includes the sealing washer body, its characterized in that: the cross section of sealing washer body is asymmetric V type structure, the internal face of sealing washer body is the perpendicular that can hug closely in the part surface, the external wall of sealing washer body is the inclined plane that can compression set forms the seal, be equipped with the recess between internal wall and the external wall, the height of external wall is less than the height of internal wall.

Further, the bottom of the sealing ring body is a plane.

Further, a distance between the inner wall surface and the corresponding wall surface of the groove is larger than a distance between the outer wall surface and the corresponding wall surface of the groove.

Further, the outward end of the outer wall surface is provided with a chamfer.

Further, the shape of the groove is an asymmetric V shape, and is consistent with the section of the sealing ring body.

Further, the depth of the groove is less than half the height of the inner wall surface.

Further, the sealing ring body is of a one-way sealing structure.

Further, the sealing ring body can be made of silica gel, nitrile rubber or fluororubber.

The utility model has the beneficial effects that: has good sealing performance and reduces damping.

Drawings

Fig. 1 is an overall view of the present utility model.

Fig. 2 is a schematic cross-sectional view of the present utility model.

Fig. 3 is a schematic diagram of the application of the present utility model.

In the figure: 1. a seal ring body; 2. an inner wall surface; 3. an outer wall surface; 4. a groove; 5. a piston rod; 6. an outer wall.

Detailed Description

The utility model will be further illustrated with reference to the following specific examples, without limiting the utility model to these specific embodiments. It will be appreciated by those skilled in the art that the utility model encompasses all alternatives, modifications and equivalents as may be included within the scope of the claims.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Referring to fig. 1 and 2, this embodiment provides a zero damping sealing ring, including a sealing ring body 1, the cross section of the sealing ring body 1 is an asymmetric V-shaped structure, an inner wall surface 2 of the sealing ring body 1 is a vertical surface capable of being tightly attached to the outer surface of a part, an outer wall surface 3 of the sealing ring body 1 is a slope capable of being compressively deformed to form a seal, a groove 4 is provided between the inner wall surface 2 and the outer wall surface 3, and the height of the outer wall surface 3 is lower than that of the inner wall surface 2. The groove 4 enables the outer wall surface 3 to be easily compressed and deformed, so that a good sealing effect is achieved in a relatively large range. The height of the inner wall surface 2 is higher than the height of the outer wall surface 3, and a relatively good sealing effect can be achieved in a microscopic scale.

In this embodiment, the distance between the inner wall surface 2 and the corresponding wall surface of the groove 4 is larger than the distance between the outer wall surface 3 and the corresponding wall surface of the groove 4. The shape of the groove 4 is also an asymmetric V shape, which is consistent with the section of the sealing ring body 1. The depth of the groove 4 is less than half the height of the inner wall surface 2.

In this embodiment, the outward end of the outer wall surface 3 is provided with a chamfer. The sealing effect is achieved, meanwhile, the movement is not influenced, and extremely small damping is achieved.

The bottom of the seal ring body 1 in this embodiment is a plane. The sealing ring body 1 is of a one-way sealing structure. The sealing ring body 1 can be made of silica gel, nitrile rubber or fluororubber.

When the utility model is applied, referring to fig. 3, the zero-damping sealing ring can be sleeved on the piston rod 5, and the piston rod 5 is driven by a common brush micro motor. The motor has low price, small volume and rotation speed of 5000r/min, but has smaller driving power, so that the motor can not overcome great resistance when driving the piston rod to reciprocate. The requirement for the sealing ring is to ensure reliable tightness on the one hand and very low resistance on the other hand.

The inner wall of the zero damping sealing ring is tightly attached to the piston rod 5, so that good tightness is ensured.

The liquid is sealed on the upper part of the zero-damping sealing ring, and when the piston rod 5 moves upwards, the liquid tends to move downwards relative to the zero-damping sealing ring. Because the outer wall surface 3 of the zero-damping sealing ring is lower than the inner wall surface 2, liquid can smoothly flow into the groove 4 of the zero-damping sealing ring, the downward trend of the liquid can spread the zero-damping sealing ring, the outer wall surface 3 of the zero-damping sealing ring is outwards spread, and therefore damping between the sealing ring and the outer wall 6 is increased, and a good sealing effect is achieved.

When the piston rod 5 moves downwards, the liquid is in an upward movement trend relative to the zero-damping sealing ring, and no leakage occurs at this time. When the zero-damping sealing ring moves downwards, the outer wall surface 3 is extruded by the outer wall 6 and can shrink inwards, so that the interference is reduced, and the damping (sliding force) between the sealing ring and the outer wall 6 is reduced. Thus, the expected effect of damping (sliding force) reduction is achieved on the premise of keeping good sealing. If necessary, the sealing ring and the outer wall 6 can have a gap when moving in the direction, so that the state of 0 damping and no friction force is realized.

The utility model has good sealing performance and reduces damping.

Claims (8)

1. The utility model provides a zero damping sealing washer, includes sealing washer body (1), its characterized in that: the cross section of sealing washer body (1) is asymmetric V type structure, the interior wall surface (2) of sealing washer body (1) are the perpendicular that can hug closely in the part surface, but outer wall surface (3) of sealing washer body (1) are compression deformation and form sealed inclined plane, be equipped with recess (4) between interior wall surface (2) and outer wall surface (3), the height of outer wall surface (3) is less than the height of interior wall surface (2).

2. A zero-damping seal according to claim 1, wherein: the bottom of the sealing ring body (1) is a plane.

3. A zero-damping seal according to claim 1 or 2, wherein: the distance between the inner wall surface (2) and the corresponding wall surface of the groove (4) is larger than the distance between the outer wall surface (3) and the corresponding wall surface of the groove (4).

4. A zero-damping seal according to claim 1 or 2, wherein: the end of the outer wall surface (3) in the outward direction is provided with a chamfer.

5. A zero-damping seal according to claim 1 or 2, wherein: the shape of the groove (4) is an asymmetric V shape, and is consistent with the section of the sealing ring body (1).

6. The zero-damping seal ring of claim 5, wherein: the depth of the groove (4) is less than half the height of the inner wall surface (2).

7. A zero-damping seal according to claim 1 or 2, wherein: the sealing ring body (1) is of a one-way sealing structure.

8. A zero-damping seal according to claim 1 or 2, wherein: the sealing ring body (1) can be made of silica gel, nitrile rubber or fluororubber.