CN218098127U - Gasket with stress detection function - Google Patents

Abstract

The utility model discloses a gasket with stress detects function relates to mechanical connection technical field, and it can partially solve at least among the prior art because the atress of stress detection optic fibre is the stress detection precision that continuous type contact atress leads to is not enough, the not high problem of sensitivity. The utility model discloses gasket with stress detects function, including the gasket main part, still including being used for changing its axial stress into the stress transmission unit of radial promotion stress detection optic fibre behind the radial stress, stress transmission unit follows the axial of gasket main part inlays and locates in the gasket main part.

Description

Gasket with stress detection function

Technical Field

The utility model relates to a mechanical connection technical field, concretely relates to gasket with stress detection function.

Background

In the field of machinery, bolts are often used for connecting and mounting mechanical structures and parts, the principle of bolt fastening is that a certain plastic deformation is generated on threads by virtue of pretightening force, in addition, the memory characteristic of a metal material is added, the restoring stress of inner and outer threads is applied to a joint surface of the inner and outer threads, so that the fastening purpose is achieved, however, along with the extension of bolt fastening time, part of the plastic deformation can become permanent deformation, so that the restoring stress is reduced, further, the locking force provided by the bolts is reduced, the bolts are loosened, and therefore, a gasket capable of monitoring the stress is needed.

Publication No.: CN211553162U, patent name: a bolt axial force sensor is disclosed, which can detect a change in stress by surrounding an optical fiber around the peripheral wall of a spacer. In the prior art, after the gasket is installed, a gasket main body can be pressed along the axis direction, then the gasket main body can generate elastic deformation under the extrusion of axial pressure, the thickness of the gasket main body along the axis direction can be shortened, and the gasket main body can be extruded towards the peripheral wall along the radial direction, the existing stress detection optical fiber is usually directly wound on the peripheral wall of the gasket main body, after the gasket main body generates elastic deformation, the peripheral wall of the gasket main body can extrude the stress detection optical fiber, so that the stress detection optical fiber is pulled, then the optical fiber signal spectrum in the gasket main body can be changed, the stress can be detected by demodulating the changed optical fiber signal spectrum through a signal demodulation instrument, but the stress detection optical fiber is directly wound on the peripheral wall of the gasket main body, the stress detection optical fiber is in continuous linear contact with the gasket main body, the stress of the gasket main body along the peripheral direction is not uniform due to the fact that the pressed surface of the gasket main body after the gasket main body is installed is not flat enough, the stress of the gasket main body along the peripheral direction is not uniform, therefore, the elastic change of the peripheral wall of the gasket main body is not uniform, so that the stress around the gasket main body is not uniform enough, and the subsequent stress detection precision is not high.

In view of this, the present application is specifically made.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gasket with stress detection function improves to the point type atress through the continuous type atress with fiber grating among the prior art to solve among the prior art problem that the stress precision that the gasket monitoring received is not enough, sensitivity is not high.

In order to solve the technical problem, the utility model discloses a following scheme:

the utility model provides a gasket with stress detection function, including the gasket main part, still including being used for changing its axial stress into the stress transmission unit of radial promotion stress detection optic fibre behind the radial stress, the stress transmission unit is followed the axial of gasket main part is inlayed and is located in the gasket main part.

In some optional embodiments, the stress transfer unit comprises a stress detection column embedded in the gasket body along the axial direction of the gasket body; the stress detection column is used for detecting the stress of the stress detection optical fiber and comprises a stress detection column, a stress detection optical fiber and a stress bow, wherein the stress detection optical fiber is arranged on the stress detection column; when the stress detection column is deformed by axial stress, the stress bow is deformed in the direction of pushing the stress detection optical fiber along the radial direction through the two connection points with shortened axial distance.

In some optional embodiments, the gasket body is provided with a mounting notch for mounting the stress detection column, a side surface of the mounting notch is communicated with the outer peripheral wall of the gasket body, and the stress-bearing bow is fixed on the side surface of the stress detection column through the mounting notch.

In some optional embodiments, the gasket body is provided with a tangent plane which penetrates through the mounting notch and is parallel to the gasket body axis, and the stress detection column is provided with a top pressing surface which is flush with the tangent plane.

In some optional embodiments, the stress detection optical fiber is arranged on the stress detection column, and the stress detection optical fiber is arranged on the stress detection column and is used for detecting the stress of the stress detection column.

In some alternative embodiments, the shape of the force-bearing arch body comprises at least one of a straight shape, a cross shape, a triangle shape, a diamond shape, and a rectangle shape.

In some optional embodiments, the shape of the stress bow is a rhombus, and two deformation transmission points are arranged on the rhombus stress bow respectively on two opposite folding angles of the stress bow.

In some optional embodiments, the gasket further comprises a pressed sheet arranged at the bottom of the gasket main body, one end of the stress detection column is fixed on the pressed sheet, and the other end of the stress detection column is a free end and is flush with the end face of the gasket main body.

In some optional embodiments, one end of the gasket body, which is flush with the stress detection column, is provided with a micro-convex step, and the stress detection column is embedded in the gasket body through the micro-convex step.

In some optional embodiments, the gasket body is provided with an arc-shaped groove on a peripheral wall thereof.

In some optional embodiments, there are at least three stress transmission units, and the stress transmission units are uniformly distributed along the circumferential direction of the gasket main body.

In some optional embodiments, the stress detection column and the force-bearing bow are both made of metal.

In some optional embodiments, the gasket further comprises a housing sleeved on the gasket main body and the stress transfer unit.

The utility model has the advantages that:

the utility model discloses a gasket with stress detects function, including the gasket main part, still including being used for changing its axial stress into radial stress after, along the stress transmission unit of radial promotion stress detection optic fibre, stress transmission unit follows the axial of gasket main part is inlayed and is located in the gasket main part.

The effect is as follows: through setting up along the axial of gasket main part and inlaying and establishing stress transmission unit, can make stress transmission unit can promote around the stress detection optic fibre of locating on the gasket main part perisporium to improve the continuous contact atress of stress detection optic fibre and gasket main part perisporium among the prior art into the point type contact atress of stress detection optic fibre and stress transmission unit, thereby solve among the prior art because the stress distribution that continuous contact atress leads to is uneven, stress accuracy is not enough, the not high problem of sensitivity.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention.

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a schematic perspective view of the embodiment of the present invention without the housing;

fig. 3 is a schematic perspective view of a gasket main body according to an embodiment of the present invention;

FIG. 4 is a schematic top view of a gasket body in material arrangement according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of an embodiment of the force-bearing bow of the present invention;

fig. 6 is a schematic perspective view of a stress detection column according to an embodiment of the present invention;

FIG. 7 is a schematic view of an embodiment of the present invention without a housing after installation of the gasket;

fig. 8 is a left side view structural diagram of the stress transfer unit in the embodiment of the present invention.

Reference numerals and corresponding part name descriptions:

1-a gasket main body, 11-an installation groove, 12-a micro convex step, 13-a tangent plane, 14-an arc groove, 2-a shell, 3-a stress transfer unit, 31-a stress detection column, 311-a top pressing surface, 32-a stress bow, 321-a stress bow main body, 322-a deformation transfer point, 4-a pressed sheet and 5-a stress detection optical fiber.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and the terms are only for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that, unless otherwise explicitly specified or limited, the terms "disposed," "opened," "installed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

As shown in fig. 1 to 7, the present embodiment provides a gasket with a stress detection function, including a gasket main body 1, and further including a stress transfer unit 3 for radially pushing a stress detection optical fiber 5 after converting an axial stress thereof into a radial stress, where the stress transfer unit 3 is embedded in the gasket main body 1 along an axial direction of the gasket main body 1.

As shown in fig. 7 and 8, the stress transfer unit 3 is embedded in the axial direction of the gasket body 1, and after the stress transfer unit 3 can convert the axial stress applied thereto into radial stress, the force detection optical fiber supported by the force transfer unit is pushed to be pulled along the radial direction, so that the axial stress applied to the stress transfer unit 3 can be detected through the stress detection optical fiber 5. Different with stress detection optic fibre 5 among the prior art around locating on gasket main part 1 perisporium, stress detection optic fibre 5 in this embodiment is fixed in gasket main part 1 through stress transmission unit 3, and fix through stress detection optic fibre 5 through stress transmission unit 3, make stress detection optic fibre 5's atress improve into point type contact stress or line segment type contact stress by traditional line type contact stress, reduce the section length that stress detection optic fibre 5 was dragged, make stress detection optic fibre 5's stress point more concentrated, and then improve precision and sensitivity when stress detection, stress detection optic fibre 5 common fiber grating among the prior art in this embodiment, the repeated description is no longer repeated here.

In some optional embodiments, the stress transfer unit 3 includes a stress detection column 31 embedded in the gasket body 1 along the axial direction of the gasket body 1; and a stress bow 32 for pushing the stress detection fiber 5 in the radial direction, the stress bow 32 being fixed to the side of the stress detection column 31 facing the stress detection fiber 5 through at least two axially spaced connection points; when the stress detection column 31 is deformed by the axial stress, the force receiving bow 32 is deformed in the radial direction toward the direction of pushing the stress detection optical fiber 5 through the two connection points whose axial distance is shortened. The stress detection column 31 is fixedly connected with the stress bow 32. After the gasket installation is accomplished, stress detection post 31 can receive axial pressure, stress detection post 31 is after it receives axial pressure, its axial length can shorten, and stress detection post 31 produces the axial and shortens the back, the axial interval of atress bow 32 and the fixed two tie points of stress detection post 31 shortens, and then make and stress detection post 31 fixed connection's atress bow 32 can shorten along gasket main part 1 along its emergence radially toward evagination, and then promote to produce around the stress detection optic fibre 5 of establishing on it and pull, deformation, carry out accurate measurement stress.

In some optional embodiments, the gasket body 1 is provided with a mounting notch for mounting the stress detection column 31, a side surface of the mounting notch is communicated with the outer peripheral wall of the gasket body 1, and the stress-bearing bow 32 is fixed on the side surface of the stress detection column 31 through the mounting notch.

In some alternative embodiments, the gasket body 1 is provided with a cut surface 13 penetrating through the mounting notch and parallel to the axis of the gasket body 1, and the stress detection column 31 has a pressing surface 311 flush with the cut surface 13. Through set up tangent plane 13 on gasket main part 1, and this tangent plane 13 runs through the installation notch setting, stress detection post 31 has the roof pressure face 311 that flushes with this tangent plane 13 simultaneously, can make whole stress transmission unit 3 install back on gasket main part 1, the structure of whole gasket is compacter, can avoid stress detection optic fibre 5 around establishing behind stress transmission unit 3, stress detection optic fibre 5 produces the contact with the periphery wall of gasket main part 1, make the deformation of gasket main part 1 produce the promotion to stress detection optic fibre 5, cause the interference of stress detection, influence the precision and the sensitivity of stress detection.

In some optional embodiments, the force-receiving bow 32 includes a force-receiving bow body 321 for pushing the stress detection optical fiber 5 in the radial direction, and at least two deformation transmission points 322 disposed on the force-receiving bow body 321, where the deformation transmission points 322 coincide with the connection points, the deformation transmission points 322 are disposed on the force-receiving bow body 321 on a side away from the stress detection optical fiber 5, and the force-receiving bow body 321 is fixedly connected to the stress detection column 31 along the axial direction of the stress detection column 31 through the deformation transmission points 322. Stress bow main part 321 is fixed in on stress detection post 31 along stress detection post 31's axial through two deformation transmission points 322, can be so that stress detection post 31 receives axial pressure to produce the axial after that shortens to warp, two deformation transmission points 322 shorten along axial distance, and then lead to stress bow main part 321 to produce along axial shortening, make stress bow main part 321 along gasket main part 1's radial evagination, make stress detection optic fibre 5 receive along gasket main part 1 radial dragging, and then realize the detection to the stress. In some embodiments, three deformation transmission points 322 or four deformation transmission points 322 may be provided, but at least two of the deformation transmission points 322 are provided along the radial direction of the stress detection column 31.

In some alternative embodiments, the shape of the force-receiving arch body 321 includes at least one of a straight shape, a cross shape, a triangular shape, a diamond shape, and a rectangular shape. In some embodiments, the shape of the force-receiving bow body 321 may be a straight line, and when the force-receiving bow body 321 is a straight line, the two deformation transmission points 322 of the force-receiving bow 32 are respectively disposed at two ends thereof; in some embodiments, the force-receiving arch body 321 may be in the shape of a cross, and when the force-receiving arch body 321 is in the shape of a cross, the two deformation transmission points 322 of the force-receiving arch 32 are respectively disposed at two opposite ends thereof.

In some alternative embodiments, the stress-bearing bow 32 is in the shape of a diamond, and two deformation transmission points 322 are disposed on the diamond stress-bearing bow 32 and disposed on two opposite folding angles thereof, respectively. As shown in fig. 5, the force-receiving bow body 321 in this embodiment is a diamond, the deformation transmission point 322 is a rectangular protrusion, and the diamond-shaped force-receiving bow 32 is fixedly connected to the stress detection column 31 through the rectangular protrusion. The fixed connection can be a welding, inserting and other fixing modes, and the fixed connection mode in the embodiment is a welding mode.

In some optional embodiments, the gasket further comprises a pressed sheet 4 arranged at the bottom of the gasket body 1, and one end of the stress detection column 31 is fixed on the pressed sheet 4, and the other end is a free end and is flush with the end face of the gasket body 1. The end face of the stress detection column 31 is flush with the end face of the gasket main body 1, so that the situation that the stress of the stress detection column 31 is far larger than the stress of the gasket due to the fact that the end face of the stress detection column 31 extends out of the end face of the gasket main body 1 can be avoided, and stress detection is inaccurate.

In some optional embodiments, the gasket body 1 has a slightly convex step 12 at the end flush with the stress detection column 31, and the stress detection column 31 is embedded in the gasket body 1 through the slightly convex step 12. A through hole communicated with the mounting notch is formed in the micro convex step 12, and the stress detection column 31 is mounted in the mounting notch of the gasket main body 1 through the through hole of the micro convex step 12; through setting up little protruding step 12, little protruding step 12 is a little higher than the terminal surface of gasket main part 1, can avoid stress detection post 31 because the uneven problem of a plurality of stress detection post 31 atresss that gasket main part 1 terminal surface is not smooth enough to lead to.

In some alternative embodiments, the gasket body 1 is provided with an arc-shaped groove 14 on the peripheral wall thereof. As shown in fig. 2 and 3, the peripheral wall of the gasket main body 1 in this embodiment is provided with the arc-shaped groove 14, and the other two folding angles of the rhombic bow without the deformation transfer points 322 are flush with the height of the arc-shaped groove 14, so that by providing the arc-shaped groove 14, the stress detection optical fiber 5 can be prevented from contacting the peripheral wall of the gasket main body 1 after the stress detection optical fiber 5 is wound around the stress transfer unit 3, thereby interfering with stress detection and affecting the precision and sensitivity of stress detection.

In some alternative embodiments, there are at least three stress transmission units 3, and the stress transmission units 3 are uniformly distributed along the circumferential direction of the gasket main body 1. As shown in fig. 1 to 4, the number of the stress transmission units 3 in the present embodiment is three, and the three stress transmission units 3 are uniformly distributed along the circumferential direction of the gasket main body 1. In some embodiments, the stress transfer elements 3 may also be four, five, six, etc. in number.

In order to avoid the insufficient strength of the stress detection column 31 and the stressed bow 32, in some alternative embodiments, the material of the stress detection column 31 and the material of the stressed bow 32 are both metal. Wherein, the metal material can be aluminum alloy and iron alloy material.

In some optional embodiments, the gasket further comprises a housing 2 sleeved on the gasket main body 1 and the stress transfer unit 3. The housing 2 is provided with a through hole (not shown) for inserting the attraction detecting optical fiber, the housing 2 in this embodiment is an integrally molded housing 2, and the material of the housing 2 is the same as that of the gasket body 1.

It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention, and such changes and modifications are to be considered as within the scope of the invention.

Claims (10)

1. The gasket with the stress detection function comprises a gasket main body (1) and is characterized by further comprising a stress transmission unit (3) which is used for converting axial stress of the gasket main body into radial stress and then pushing a stress detection optical fiber (5) in the radial direction, wherein the stress transmission unit (3) is embedded in the gasket main body (1) along the axial direction of the gasket main body (1).

2. The gasket having a stress detection function according to claim 1, wherein the stress transmission unit (3) includes a stress detection post (31) embedded in the gasket main body (1) in an axial direction of the gasket main body (1); and a stress bow (32) for pushing the stress detection fiber (5) in the radial direction, wherein the stress bow (32) is fixed on the side surface of the stress detection column (31) facing the stress detection fiber (5) through at least two connection points which are spaced in the axial direction;

when the stress detection column (31) is deformed by axial stress, the stress bow (32) is deformed in the direction of pushing the stress detection optical fiber (5) along the radial direction through two connection points with shortened axial distance.

3. The gasket with the stress detection function according to claim 2, wherein the gasket main body (1) is provided with a mounting notch for mounting the stress detection column (31), the side surface of the mounting notch is communicated with the outer peripheral wall of the gasket main body (1), and the stress bow (32) is fixed on the side surface of the stress detection column (31) through the mounting notch.

4. The gasket with the stress detection function as claimed in claim 3, wherein the gasket body (1) is provided with a cut surface (13) penetrating through the mounting notch and parallel to the axis of the gasket body (1), and the stress detection column (31) is provided with a pressing surface (311) flush with the cut surface (13).

5. The gasket with the stress detection function according to claim 2, wherein the stress bow (32) comprises a stress bow main body (321) for pushing the stress detection optical fiber (5) and at least two deformation transmission points (322) arranged on the stress bow main body (321), the deformation transmission points (322) coincide with the connection points, the deformation transmission points (322) are all arranged on the stress bow main body (321) far away from one side of the stress detection optical fiber (5), and the stress bow main body (321) is fixedly connected with the stress detection column (31) through the deformation transmission points (322) along the axial direction of the stress detection column (31).

6. The gasket with stress detection function as claimed in claim 5, wherein the shape of the force-bearing bow body (321) comprises at least one of a straight line shape, a cross shape, a triangular shape, a diamond shape and a rectangular shape.

7. The gasket with the stress detection function as recited in claim 6, wherein the stress-bearing bow body (321) is in a diamond shape, and two deformation transmission points (322) are respectively arranged on two opposite folding angles of the diamond-shaped stress-bearing bow (32).

8. The gasket with the stress detection function as claimed in claim 2, further comprising a pressed sheet (4) arranged at the bottom of the gasket main body (1), wherein one end of the stress detection column (31) is fixed on the pressed sheet (4), and the other end is a free end and is flush with the end face of the gasket main body (1).

9. The gasket with the stress detection function according to claim 8, wherein the gasket main body (1) has a slightly convex step (12) at the end flush with the stress detection column (31), and the stress detection column (31) is embedded in the gasket main body (1) through the slightly convex step (12).

10. The gasket with the stress detection function as recited in claim 1, wherein the number of the stress transmission units (3) is at least three, and the stress transmission units (3) are uniformly distributed along the circumferential direction of the gasket main body (1).

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