AU2021103206A4 - A Sensor Type Elastic Washer For Dynamic Monitoring Of Screw Connection Preload - Google Patents
A Sensor Type Elastic Washer For Dynamic Monitoring Of Screw Connection Preload Download PDFInfo
- Publication number
- AU2021103206A4 AU2021103206A4 AU2021103206A AU2021103206A AU2021103206A4 AU 2021103206 A4 AU2021103206 A4 AU 2021103206A4 AU 2021103206 A AU2021103206 A AU 2021103206A AU 2021103206 A AU2021103206 A AU 2021103206A AU 2021103206 A4 AU2021103206 A4 AU 2021103206A4
- Authority
- AU
- Australia
- Prior art keywords
- gasket
- washer
- saddle
- integrated circuit
- circuit board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 230000036316 preload Effects 0.000 title claims abstract description 13
- 238000012544 monitoring process Methods 0.000 title abstract description 11
- 230000010354 integration Effects 0.000 claims abstract description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 229920001971 elastomer Polymers 0.000 abstract 1
- 239000000806 elastomer Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
- G01L5/243—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed using washers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
- F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
- F16B31/028—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load with a load-indicating washer or washer assembly
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention discloses a sensor type elastic washer for dynamic monitoring the preload of
thread connection, the washer can occur deformation, including the gasket subject, two strain
gauges, an integrated circuit board and some small support members embedded in an elastomer,
gasket to look like a saddle, but its and the difference between ordinary common saddle elastic
gasket:Saddle processing out of the four flat end on both sides, and more than the following
processing saddle sunken place, out of the four surface described under four curved two concave
embedding and have the same two strain gages and eight symmetrically small support parts, gasket
put tiny integrated circuit board runs on both sides of groove, connected with one end groove of
open wire slot.Strong practicability, high sensitivity, the invention puts a tiny integrated circuit
board, wire slots and grooves Settings make the structure and function has the characteristics of
integration, to achieve real-time monitoring bolt pre-tightening force and under the premise of
locking purposes, and can achieve the goal of efficiency of authors and widely used, has a broad
application prospect, plus the gaskets and ordinary saddle gasket material.Therefore, it can be used
as an intelligent washer for a long time.
Drawings of Descriptions
Figure 1
7
L 17 3
d
Figure 2
Description
Drawings of Descriptions
Figure 1
7 L 17 3
d
Figure 2
Descriptions
A sensor type elastic washer for dynamic monitoring of screw connection
preload
Technical Field:
[0001] The invention relates to a sensor type elastic washer which can dynamic monitor the
preloading force of a threaded connection, belonging to the field of the combination of bolt
connection technology and sensor technology in mechanical engineering.
Background Technology:
[0002] Bolt connection is used in all walks of life, with the function of strengthening connection
and sealing.In most cases, when the bolt connection is collided and impacted for a long time, the
bolt will become loose or fail, and finally the connector separates, leakages and other major
accidents will occur.Therefore, most of the bolts are connected by adding a washer. When the
washers are pressed, the backspring force will be generated and the friction force between the
threads will be increased. In this way, the friction force will effectively prevent the loosening of
bolts.From this point of view, the technology researchers came up with the idea of adding sensors in
the gaskets to detect bolt loosening to predict the safety of the device.With the development of
modem automation technology, the country pays more attention to the "unmanned safety
monitoring" technology, so the demand of using strain gauge gasket sensor is more and more
vigorous.
[0003] Bolts must be tightened when they are in use. When they are tightened, the bolts are
subjected to tensile load and thus to axial tension. This force is called pre-tightening force.When the
bolt loosens or fails, the pre-tightening force will change. Based on this, most of the existing
technologies adopt the method of monitoring the pre-tightening force and torque of the bolt.Torque
measurement method: when the bolt is tightened, there is a torque force. When the bolt is loosened,
the torque changes. A torque meter can be used for timing detection of the bolt connection.Strain
sensor method: as mentioned above, strain gages are added to the gasket to sense the change of bolt
pretightening force. However, in the existing technology, the structure in the gasket is too complex, too many strain gages are used, and the external circuit is complex, leading to high manufacturing cost, and the fundamental problem cannot be solved.
Invention Content:
[0004] Aiming at the shortcomings of the above problems, the invention provides a sensor type
elastic gasket which can dynamic monitor the preloading force of the threaded connection. Four end
planes are arranged on the structure similar to the saddle-shaped gasket, and small supports and
strain gages are embedded on the cambrid surface of the concave bottom of the gasket. Two
identical strain gages are pasted on the two lower concave surfaces.The lead wire of the strain
gauge is connected to a miniature integrated circuit board at the groove through the lead
groove.When the pre-load of the main body of the gasket is changed, the strain gauge senses the
deformation of the main body of the gasket and transmits it to the micro-integrated circuit board
through the lead wire. The perceived deformation signal is transmitted through the micro-integrated
circuit board through wireless communication, which can effectively improve the efficiency of the
pre-load monitoring of bolts.Through the improvement in the connection circuit wireless
transmission principle, the position and number of the sticking strain gauge and the shape and
structure of the gasket, not only the pre-tightening force of the bolt can be monitored in real time,
but also the cost problem can be reduced.
[0005] In order to achieve the above requirements, a dynamic monitoring thread coupling elastic
washer pre-tightening force of sensor type, its characteristic is that includes similar saddle saddle
gasket subject, two strain gauges, an integrated circuit board and eight small supporting parts,
gasket set structure has four flat end, four cambered surfaces, two wire slots and two grooves,It is
four on the concave surface with strain gages and embedded with support, support the same, as
stated in the number of eight, the strain gauge is the same of number of 2, by putting the wires of A
strain gauge after wire slot derivation, received grooves in the tiny integrated circuit boards, may
meet a bridge circuit, a amplifier, a A/D conversion circuit, etc.,Then through the microprocessor,
connector, wireless communication module transmission to the cloud, can be connected to the
database, data transmission and real-time monitoring of the staff.
[0006] Preferably, the gasket body is shaped like a saddle saddle.
[0007] Preferably, the saddle washer structure is provided with end planes, a number of which is
4.
[0008] Preferably, the saddle-shaped gasket structure is provided with cambered surfaces, and
the number of cambered surfaces is 4, including two lower concave surfaces and two upper convex
surfaces.
[0009] Preferably, the two lower concave surfaces are pasted with the same strain gauges, and
the number of strain gauges is 2.
[0010] Preferably, the two lower concave surface inserts have the same support members, and
the number of support members is 8.
[0011] Preferably, the body of the saddle-shaped gasket is provided with two strain gauge leads
leading grooves.
[0012] Preferably, the saddle washer body is provided with two grooves.
[0013] Compared with the prior art, the invention has the following beneficial effects:
[0014] 1. There are 8 small supports embedded in the saddle-shaped washer. When elastic
washer is applied to the bolt connection, it is pressed,the small supports protect the strain gauges
from extrusion;
[0015] 2. Four cambered surfaces are arranged at the concave part of the main body of the saddle
gasket , the two lower concave surfaces of the four cambered surfaces are pasted with the same
strain gauge , When the preload on the gasket body changes, strain gauges sensor the gasket body
caused by bolt connection vibration deformation signals, after lead groove and the groove of
transmission and processing control, wireless communication, convenient long-distance real-time
monitor of the staff;
[0016] 3. By considering the strain gauge paste position and quantity, the gasket shape structure
and principle of integrated circuit design, in the real time monitoring on the premise of bolt
pre-tightening force, make the structure and function has the characteristics of integration, has a
broad application prospect, plus the gaskets and ordinary saddle gasket material, in order to achieve
the goal of strong practicability, low cost,It can be used as an intelligent washer for a long time.
Illustration:
[0017] In order to more clearly illustrate the technical solutions in the prior art of the invention, a
brief introduction of the drawings required in the description of the invention and the prior art is given below.
[0018] Fig. 1 is a structural schematic diagram of a sensor-type elastic washer which can dynamic monitor the preloading force of threaded connection provided by the invention.
[0019] Fig. 2 is the front view of the main body of the saddle washer;
[0020] Fig. 3 is a top view of the main body of the saddle washer;
[0021] Fig. 4 is the profile view of the integrated circuit board at the grooves of the saddle washer.
[0022] Fig. 5 is a schematic diagram of the working state of the invention.
[0023] 1. Elastic body; 2 and 3, strain gauge;4, 5, 6 and 7, end plane;8 and 9, grooves;10. Mini-integrated circuit board;11 and 12, leads;13 and 14, lead slots;15. Connector;16. Plug;17. Small support pieces;18 and 19, lower concave;20. Leather washer;21. Connecting plate;22. Nuts.
[0024] D. Outside diameter of gasket;d Inner diameter of gasket;L. Width of end plane;H. Thickness of gasket;H. Thickness of saddle beam.
Specific implementation methods:
[0025] The present invention relates to a sensor-type elastic washer which can dynamic monitor the preloading force of a threaded connection. The technical scheme of the present invention is clearly and completely described below in combination with the drawings attached to the present invention. It is obvious that the embodiments described are only a part of the present invention and not the whole embodiments.
[0026] Please refer to figure 1-5, the present invention provides a technical solution a dynamically monitoring thread coupling pre-tightening force of sensor type elastic washer, including washer subject 1, 2, strain gauge 3 and integrated circuit board 10, described elastic ring main body to look like a saddle saddle, described the gasket sets up the main structure has four end plane 4, 5, 6, 7,also sets up 4 and 5 are two grooves, two wire slots 13 and 14, described the gasket set has four main saddle sunken place of round, described four curved two 18 and concave curve surface under 19 embedded the same small supports 17 have eight, at the same time in the 18th and 19th two surface using strain glue has the same two strain gages 2 and 3,the lead line of the two strain gages are connected with the micro integrated circuit board 10 on the groove 9 through lead 11 and lead 12 through lead groove 13 and 14.At the same time, the size ratio of the gasket is designed according to the common bolt connection, but also according to the actual use of the size of the adjustment, has a strong applicability.
[0027] Two concave under the strain gauge on the outlet line 11 and 12 after wire slot 13 and 14, connected to the micro bridge circuit of integrated circuit board 10, according to the practical used bolt connection, amplifier, a bridge circuit can be connected again a connecting microprocessor, a connector 15, of which 10 by miniature integrated circuit board power supply plug 16, through wireless communication module,The signal is transmitted to the cloud, entered into the database, and then data transmission is carried out to facilitate the staff to monitor the use of the bolt connection in real time.
[0028] Works: For this type of gasket, when applied to the bolt joint, connecting bolts in turn through the plate 21, leather washer 20, elastic ring main body 1 and nut 22 and tighten the nut ,elastic washer is compact, at this point, the embedded in the concave on the small supports 17 can well protect the strain gauge 2 and strain gauge 3 from damage.When the bolt connection is in the working state, the saddle washer is compressed and receives a force along the axial direction, which is called the preload force.Due to external factors bolt connection for a long time when the vibration and impact, the prestressing force of the washer is changing, bolted looseness, elastic washer 1 wants to change the status of flattened body, thus a certain amount of deformation force, at the same time, paste on the elastic body of strain gauge, 2 on the deformation and strain gauge 3 induction signal in certain micro strain,By transverse tensile stress, lead to changes in resistance strain gauge, and 11 and 12 inlets through A strain gauge by wire slot 13 and 14 received A miniature integrated circuit board of the grooves where, through the integrated circuit boards of a bridge circuit, a mplifier, a A/D conversion circuit, microprocessor and other processing, after the wireless transmitting module is sent to A receiving module,Then the signal received is processed and the bolt connection is loosened or broken.At the same time, because the elastic washer body is provided with four end planes 4, 5, 6 and 7, the washer can also play a very good role in preventing loose.
[0029] When in use, the intelligent gasket can be protected, the strain gauge 2, 3 and its lead line 11, 12 for moisture-proof and rust protection, rust proof, moisture-proof agent can be used to smear, can also be applied to the micro integrated circuit board 10 moisture-proof agent or moisture-proof circuit board, in order to increase the service life of the intelligent gasket.
[0030] To sum up, considering the structure of elastic gasket, the number and position of pastered strain gage, the force direction of strain gage, the principle of electric bridge circuit and the economic cost, the invention designs a strain gasket sensor that can monitor the change of bolt pretightening force in real time, and the gasket has a good anti-loosening ability.In addition, it should be understood that although this specification is described in terms of the implementation mode, not each step mode contains only one technical method. Therefore, the implementation steps in this specification are only my design ideas and other implementation modes can be understood by the relevant technical personnel.Any modification, equivalent replacement or improvement made within the ideas and principles of the invention shall be covered by the protection of the invention.
Claims (6)
1. A sensor-type elastic washer which can dynamic monitor the pre-load force of the
thread connection, its characteristic is that includes elastic body 1, strain gauge 2, strain gauge 3 and integrated circuit board 10, referred to the ends of the elastic body 1 set with four side planes 4, 5, 6,
7, as described in the concave of the elastic body 1 sets four cambered surfaces, described four
curves can be divided into two concaves and two convexs, described under two concave have two
of the same strain gages, namely the strain gauge 2 and strain gauge 3, described two strain gauges
lead by 11 and 12 lead to lead, lead to connect to the tiny integrated circuit board 10, described in
the integrated circuit board Settings have splice pieces of 15 and plug 16. The elastic body 1 looks
like a circular ring gasket from the top view, and its structure is saddle-shaped, and its shape is roughly consistent with the ordinary saddle-shaped gasket.
2. According to the sensor-type elastic washer which can dynamic monitor the pre-load force of the
thread connection mentioned in claim 1, it is characterized in that the outer diameter of the washer
body 1 is 1.5-6.5 times the thickness of the washer body.
3. According to the sensor-type elastic washer which can dynamic monitor the pre-load force of the thread connection mentioned in claim 1, its characteristic lies in that the two strain gauges pasted on the main structure 1 of the gasket are subjected to either tensile stress or compressive stress.
4. According to the sensor-type elastic washer which can dynamic monitor the pre-load force of the
thread connection mentioned in claim 1, its characteristic lies in that the structure of the elastic
washer body 1 is provided with two grooves, namely groove 8 and groove 9, and the tiny integrated circuit board 10 is fixed in groove 9.
5. According to the sensor-type elastic washer which can dynamic monitor the pre-load force of the thread connection mentioned in claim 1, its characteristics is described the structure of the elastic
washer subject 1 internal opening two wire slot, the lead wire slot 13 and lead wire slot 14,
described two lead tanks with groove 9 make the structure and function have the advantage of integration.
6. According to the sensor-type elastic washer which can dynamic monitor the pre-load force of the thread connection mentioned in claim 1, the feature is that the support member 17 (8) is embedded on the lower concave surface of the gasket body 1, which is symmetrically embedded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021103206A AU2021103206A4 (en) | 2021-06-08 | 2021-06-08 | A Sensor Type Elastic Washer For Dynamic Monitoring Of Screw Connection Preload |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021103206A AU2021103206A4 (en) | 2021-06-08 | 2021-06-08 | A Sensor Type Elastic Washer For Dynamic Monitoring Of Screw Connection Preload |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2021103206A4 true AU2021103206A4 (en) | 2021-08-05 |
Family
ID=77076110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2021103206A Ceased AU2021103206A4 (en) | 2021-06-08 | 2021-06-08 | A Sensor Type Elastic Washer For Dynamic Monitoring Of Screw Connection Preload |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2021103206A4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893492A (en) * | 2022-03-28 | 2022-08-12 | 南京理工大学 | Intelligent gasket for monitoring bolt pretightening force change in real time |
-
2021
- 2021-06-08 AU AU2021103206A patent/AU2021103206A4/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114893492A (en) * | 2022-03-28 | 2022-08-12 | 南京理工大学 | Intelligent gasket for monitoring bolt pretightening force change in real time |
| CN114893492B (en) * | 2022-03-28 | 2023-08-11 | 南京理工大学 | A intelligent gasket for real-time supervision bolt pretightning force changes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK22 | Patent ceased section 143a(d), or expired - non payment of renewal fee or expiry |