CN109798297A - A kind of gasket and bolt axial force detection method of detectable bolt axial force - Google Patents
A kind of gasket and bolt axial force detection method of detectable bolt axial force Download PDFInfo
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- CN109798297A CN109798297A CN201910184617.6A CN201910184617A CN109798297A CN 109798297 A CN109798297 A CN 109798297A CN 201910184617 A CN201910184617 A CN 201910184617A CN 109798297 A CN109798297 A CN 109798297A
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- Prior art keywords
- gasket
- axial force
- bolt
- bolt axial
- detection method
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Abstract
The present invention relates to bolt axial force detection technique field, in particular to the gasket and bolt axial force detection method of a kind of detectable bolt axial force.The gasket includes Upper gasket and lower gasket, and the Upper gasket is socketed on the lower gasket and is provided with gap between the Upper gasket and lower gasket after the Upper gasket and lower gasket are socketed.The bolt axial force detection method carries out bolt axial force detection by the measurement of the clearance height in gasket between Upper gasket and lower gasket and gasket performance indicatrix.The gasket of detection bolt axial force in the present invention may be directly applied to the engineering of all kinds of bolts in practice.For the gasket under axial compression load effect, the flexible deformation of generation will cause the variation of gasket lateral gap, and by measuring the height of gasket lateral gap, the axial force of bolt can be quickly obtained according to gasket performance Characteristic Curve data.And the gasket stores elastic strain energy in use, has the function of spring shim.
Description
Technical field
The present invention relates to bolt axial force detection technique field, in particular to a kind of the gasket and bolt of detectable bolt axial force
Axle power detection method.
Background technique
It is bolted and is widely used to aerospace, communications and transportation, bridge as a kind of convenient and reliable type of attachment
The various industries such as building and mechanical heavy industry.Pretension bolt especially high-intensitive for bolt is often subjected to multiple in use
Miscellaneous alternating load, temperature loading etc., the sedimentation of contact surface and the creep of material, bolt axial pre tightening force tend to occur become in addition
Change, and then the destruction of derivating screw connection.Therefore, the detection demand of bolt axial force is increasingly urgent to.However, to bolt axial force
Test and comparison is difficult.
It is desirable to by special test macro or sensor, as bolt axial force ultrasound test system and annular are pre-
Clamp force sensor etc..Usually there is inconvenient problem with use in such sensor or test macro, also, belong to test and set
It is standby, bolt pretightening can only be tested in the lab, engineering be difficult in practice to the Axial stress in bolt in using into
Row real-time monitoring.
Therefore, it needs to research and develop now a kind of convenient for carrying out real-time monitoring to the Axial stress in bolt in using and simple
Axial stress in bolt detection device and detection method.
Summary of the invention
To solve the shortcomings of the prior art, the present invention provides the gasket and bolt axial force of a kind of detectable bolt axial force
Detection method.
The technical solution of the present invention is as follows:
A kind of gasket of detectable bolt axial force, including Upper gasket and lower gasket, the Upper gasket are socketed on the underlay
After piece, the Upper gasket and lower gasket socket, gap is provided between the Upper gasket and lower gasket.
Further, it is provided with recessed portion on the Upper gasket face opposite with lower gasket, is provided on the lower gasket
The boss to fit with recessed portion, the height of the boss are higher than the depth of the groove.
Further, the section of the boss is set as trapezoidal.
A kind of bolt axial force detection method, is detected by above-mentioned gasket.
Further, it is detected by the measurement of the clearance height in above-mentioned gasket between Upper gasket and lower gasket.
Further, the specific steps detected by clearance height measurement are as follows: in working bolt state or laboratory
On rack, the height in gap is directly or indirectly measured using measuring tool, by the performance characteristic curve of gasket, further to survey
Obtain the axle power of bolt.
Further, the gasket performance indicatrix measures method are as follows: passes through clearance height and axial compression load
Relationship, obtain clearance height and load corresponding relationship curve be gasket performance indicatrix.
The beneficial effects obtained by the present invention are as follows are as follows:
The gasket of detection bolt axial force in the present invention may be directly applied to the engineering of all kinds of bolts in practice.The gasket exists
Under axial compression load effect, the flexible deformation of generation will cause the variation of gasket lateral gap, between on the outside of measurement gasket
The height of gap can quickly obtain the axial force of bolt according to gasket performance Characteristic Curve data.And the gasket is in use process
In store elastic strain energy, have the function of spring shim.
Detailed description of the invention
Fig. 1 is the sectional view of gasket in the present invention.
Fig. 2 is the performance characteristic curve synoptic diagram of gasket in the present invention.
Wherein, 1, Upper gasket；101, recessed portion；2, lower gasket；201, boss；3, gap.
Specific embodiment
For convenient for it will be understood by those skilled in the art that the present invention, illustrates specific embodiment party of the invention with reference to the accompanying drawing
Formula.
Shown in Figure 1, the embodiment of the present invention provides a kind of gasket that can detecte bolt axial force, including 1 He of Upper gasket
2 two parts of lower gasket.In use, there are gaps 3 on the outside of gasket between Upper gasket 1 and lower gasket 2, the lateral gap 3 is in spiral shell
Bolt exists when not applying pretightning force, still has in pre- next and use process, and only corresponding change can occur for height.It is logical
Cross the height in measurement gap 3, gasket performance indicatrix according to Fig.2, the axial load that available bolt is subject to.
Recessed portion 101 is equipped on the inside of Upper gasket 1,2 inside corresponding positions of lower gasket are equipped with boss 201, lower gasket 2 when use
The upper surface of boss 201 is in contact with the lower surface of the recessed portion 101 of Upper gasket 1.The height of boss 201 is greater than recessed portion 101
Depth, guarantee that gap 3 exists always during the entire process of bolt use.
To guarantee Upper gasket 1 and 2 no-float of lower gasket, correlation displacement will not be occurred, the lateral surface of recessed portion 101 with
The outer surface of boss 201 is bonded to each other.
The section of boss 201 is trapezoidal or approximate shapes, and size is according to the diameter of bolt, performance rate, prefastening load, work
Make load and material carries out careful design, it is ensured that the gasket is in elastic stage in life cycle management, is not in permanent
The plastic deformation of property.
In use process, under the effect of bolt axial compression load, flexible deformation occurs gasket for gasket, on the outside of gasket between
Reversible variation will occur for gap 3, can detecte Axial stress in bolt by measuring 3 changing value of gap.
In use process, under axial compression load effect, flexible deformation occurs for gasket, has the function of spring shim,
Alternative spring shim in actual use.
Every batch of or each gasket need to carry out axial compression test, obtain its performance characteristic curve, i.e. gap-pressure is bent
Line.It is obtained using laboratory's measurement method, data are divided into static nature curve and two kinds of dynamic characteristic values.Static nature curve
For the relationship of clearance height and axial compression load that gasket measures under the conditions of static load (loading velocity is slow), it to be used for table
Levy quiescent operation load gap/pressure corresponding relationship.Dynamic characteristic values are that (load is according to certain frequency in dynamic load for gasket
Rate is loaded) under the conditions of the relationship of clearance height and pressure that measures, for characterizing, gap under alternating load/pressure is corresponding to be closed
System.
The performance characteristic curve (as shown in Figure 2) of certain gasket obtained in the present embodiment are as follows:
Y=2E-7x4-0.0001x3+0.0199x2-1.8699x+95.52
Wherein, x: the height in gap；
Y: axial compressive force suffered by gasket；
E: the letter in scientific notation indicates the index with 10 bottom of for.
Wherein, the height in gap 3 can be measured by clearance gauge or other tools, can be obtained according to performance characteristic curve
To the axial load value of bolt at this time.
As option, the measurement of gasket lateral gap 3 can be by Upper gasket 1 and the measurement of 2 apparent height of lower gasket or upper pad
The measurement of 1 lower gasket of piece, 2 any two points distance substitutes.
The present embodiment in actual use, can according to need, and be equipped in above-mentioned detectable bolt axial force gasket construction
Following apparatus system, and increase corresponding function:
1) gap real-time acquisition device: such as optical distance detecting devices carries out dynamic in real time to the height in gap 3 and surveys
Amount, save passback, obtain the height of transient state gap 3 of the gasket and the time history of 3 height of gap.
2) critical state alarm device: scene or remote alarming device are passed through by the real time monitoring to 3 height of gap
Processing system is automatically converted to bolt axial force, when bolt axial force is more than critical value, implements scene or long-range sound, light, point etc.
Etc. patterns alarm.
The embodiments of the present invention described above are not intended to limit the scope of the present invention.It is any in the present invention
Spirit and principle within made modifications, equivalent substitutions and improvements etc., should be included in claim protection model of the invention
Within enclosing.
Claims (7)
1. a kind of gasket of detectable bolt axial force, it is characterised in that: including Upper gasket and lower gasket, the Upper gasket is socketed on
After the lower gasket, the Upper gasket and lower gasket socket, gap is provided between the Upper gasket and lower gasket.
2. a kind of gasket of detectable bolt axial force according to claim 1, it is characterised in that: the Upper gasket and underlay
It is provided with recessed portion on the opposite face of piece, the boss to fit with recessed portion, the height of the boss are provided on the lower gasket
Degree is higher than the depth of the groove.
3. a kind of gasket of detectable bolt axial force according to claim 1, it is characterised in that: the section of the boss is set
It is set to trapezoidal.
4. a kind of bolt axial force detection method, it is characterised in that: examined by gasket a method according to any one of claims 1-3
It surveys.
5. a kind of bolt axial force detection method according to claim 4, it is characterised in that: appointed by such as claim 1-3
The measurement of clearance height is detected between Upper gasket and lower gasket in gasket described in one.
6. a kind of bolt axial force detection method according to claim 5, which is characterized in that measured and carried out by clearance height
The specific steps of detection are as follows: in working bolt state or laboratory's rack, gap is directly or indirectly measured using measuring tool
Height, by the performance characteristic curve of gasket, further to measure the axle power of bolt.
7. a kind of bolt axial force detection method according to claim 6, which is characterized in that the gasket performance indicatrix
Measure method are as follows: by the relationship of clearance height and axial compression load, obtain clearance height and load corresponding relationship curve
As gasket performance indicatrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910184617.6A CN109798297A (en) | 2019-03-12 | 2019-03-12 | A kind of gasket and bolt axial force detection method of detectable bolt axial force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910184617.6A CN109798297A (en) | 2019-03-12 | 2019-03-12 | A kind of gasket and bolt axial force detection method of detectable bolt axial force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109798297A true CN109798297A (en) | 2019-05-24 |
Family
ID=66562830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910184617.6A Withdrawn CN109798297A (en) | 2019-03-12 | 2019-03-12 | A kind of gasket and bolt axial force detection method of detectable bolt axial force |
Country Status (1)
| Country | Link |
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| CN (1) | CN109798297A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678627A (en) * | 2020-05-21 | 2020-09-18 | 北京交通大学 | Stress test method for shield tunnel segment connecting bolt |
-
2019
- 2019-03-12 CN CN201910184617.6A patent/CN109798297A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111678627A (en) * | 2020-05-21 | 2020-09-18 | 北京交通大学 | Stress test method for shield tunnel segment connecting bolt |
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Application publication date: 20190524 |
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| WW01 | Invention patent application withdrawn after publication |