CN116499629A - Bolt stress detection assembly and stress detection method - Google Patents
Bolt stress detection assembly and stress detection method Download PDFInfo
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- CN116499629A CN116499629A CN202310692125.4A CN202310692125A CN116499629A CN 116499629 A CN116499629 A CN 116499629A CN 202310692125 A CN202310692125 A CN 202310692125A CN 116499629 A CN116499629 A CN 116499629A
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- 238000001514 detection method Methods 0.000 title claims abstract description 127
- 238000004891 communication Methods 0.000 claims abstract description 50
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- 238000005452 bending Methods 0.000 claims description 7
- 238000010008 shearing Methods 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 2
- 238000009662 stress testing Methods 0.000 claims 1
- 230000002349 favourable effect Effects 0.000 abstract description 2
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- 238000012545 processing Methods 0.000 description 2
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
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- 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
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The application provides a bolt stress detection assembly and a stress detection method, wherein the bolt stress detection assembly comprises a bolt, a gasket and a strain sensor; the bolt comprises a bolt head and a screw rod, the bolt head is arranged at one end of the screw rod, the screw rod comprises a polished rod section and a thread section, the polished rod section is connected with the bolt head, the thread section is positioned at one end of the polished rod section, which is away from the bolt head, and the gasket is sleeved at the outer side of the polished rod section; the polished rod section is provided with at least one detection part, the strain sensor is arranged on the detection part, a gap is formed between the detection part and the gasket, the gasket is provided with a communication part used for communicating with the external environment, and a lead of the strain sensor is used for being connected with external detection equipment after passing through the gap and the communication part. The method and the device realize detection of the bolt stress on the premise of not damaging the structure of the bolt, and are favorable for improving the accuracy of the bolt stress detection data.
Description
Technical Field
The application relates to a mechanical part detection technology, in particular to a bolt stress detection assembly and a stress detection method.
Background
The shield tunneling machine is tunnel construction equipment for excavating and lining a subsurface tunnel by cutting the soil through a cutter head under the protection of a steel shell. The torque required for the shield tunneling is provided by the main drive, and the main bearing is a core component in the main drive. Fig. 1 is a schematic view of a part of a main driving device of a heading machine. As shown in fig. 1, the main driving device includes a motor 10, a speed reducer 20, a pinion 30, and a main bearing, wherein the main bearing includes an inner ring 41, a first outer ring 42, a second outer ring 43, and a connecting ring 44, the first outer ring 42, the second outer ring 43, and the connecting ring 44 are fixedly connected, and the inner ring 41 and a cutter flange 50 are fixedly connected by bolts 100. The output end of the motor 10 is connected with a speed reducer 20, the speed reducer 20 is connected with a pinion 30, and the power output by the motor 10 is transmitted to the pinion 30 through the speed reducer 20 so as to drive the pinion 30 to rotate; pinion 30 engages inner race 41, driving inner race 41 in motion. In this process, the load transmitted from the outside is also transmitted from the first stage, and the bolts 100 connecting the inner ring 41 and the cutter flange 50 are used as important parts for directly transmitting power, the strength and the distribution of each bolt 100 are precisely calculated, and once the bolts 100 break due to overlarge load, the load of the rest bolts 100 on the main bearing is instantaneously increased, thereby causing serious chain reaction, and the stress detection is very important.
In the related art, for detecting the stress of the bolt 100, a strain sensor is mainly adhered to the surface of the bolt 100, a through hole is drilled on the surface of the bolt 100, a lead of the strain sensor passes through the through hole and then is connected with an external detection device, and the external detection device calculates the stress of the bolt 100 by collecting strain data transmitted by the strain sensor.
However, with the related art, since it is necessary to make a through hole in the surface of the bolt 100, the internal structure of the bolt 100 is broken, resulting in a decrease in the strength of the bolt 100, and thus a deviation of the detected stress of the bolt 100 from the actual stress of the bolt 100.
Disclosure of Invention
In order to overcome the above-mentioned defect under the related art, an object of the present application is to provide a bolt stress detection assembly and a stress detection method, which do not need to destroy the structure of the bolt, and are beneficial to improving the accuracy of the bolt stress detection data.
In one aspect, the present application provides a bolt stress detection assembly comprising a bolt, a spacer, and a strain sensor; the bolt comprises a bolt head and a screw rod, the bolt head is arranged at one end of the screw rod, the screw rod comprises a polish rod section and a thread section, the polish rod section is connected with the bolt head, the thread section is positioned at one end of the polish rod section, which is away from the bolt head, and the gasket is sleeved at the outer side of the polish rod section; the novel polishing rod is characterized in that at least one detection part is arranged on the polish rod section, the strain sensor is arranged on the detection part, a gap is formed between the detection part and the gasket, a communication part used for communicating with the external environment is arranged on the gasket, and a lead of the strain sensor is used for being connected with external detection equipment after passing through the gap and the communication part.
The bolt stress detecting assembly as described above, optionally, the communication portion is a through hole provided in the gasket.
In the bolt stress detection assembly as described above, optionally, the communication portion is a groove provided on a surface of the washer, and the groove is located on a side of the washer facing the bolt head.
In the bolt stress detection assembly as described above, optionally, the detection portion is a plane parallel to an axis of the bolt, and the strain sensor is mounted on the plane.
The bolt stress detection assembly as described above, optionally, the detection portion includes a first detection portion and a second detection portion, the first detection portion and the second detection portion being symmetrically disposed with respect to an axis of the bolt, the strain sensor including a first strain sensor mounted on the first detection portion and a second strain sensor mounted on the second detection portion;
the communication part comprises a first communication part and a second communication part, the first communication part corresponds to the first detection part, and the second communication part corresponds to the second detection part.
The bolt stress detection assembly as described above, optionally, the strain sensor comprises a first sub-strain sensor, a second sub-strain sensor and a third sub-strain sensor, the second sub-strain sensor is located between the first sub-strain sensor and the third sub-strain sensor, the second sub-strain sensor is parallel to the axis of the bolt, the angle between the first sub-strain sensor and the second sub-strain sensor is 45 °, and the angle between the third sub-strain sensor and the second sub-strain sensor is 45 °.
In the bolt stress detection assembly, the strain sensor is optionally adhered to the detection part, and a rubber layer and a shielding layer are further arranged on the surface of the strain sensor.
In another aspect, the present application provides a method for detecting bolt stress, including:
providing a bolt, wherein the bolt comprises a bolt head and a screw rod, the bolt head is arranged at one end of the screw rod, the screw rod comprises a polished rod section and a thread section, the polished rod section is connected with the bolt head, the thread section is positioned at one end of the polished rod section, which is away from the bolt head, and at least one detection part is arranged on the polished rod section;
mounting a strain sensor on the detection portion;
the gasket is sleeved on the outer side of the polish rod section, a gap is formed between the detection part and the gasket, a communication part used for communicating with the external environment is arranged on the gasket, and a lead of the strain sensor is connected with external detection equipment after passing through the gap and the communication part.
In the bolt stress detection method as described above, optionally, the detection portion includes a first detection portion and a second detection portion, the first detection portion and the second detection portion are symmetrically disposed with respect to an axis of the bolt, and the strain sensor includes a first strain sensor mounted on the first detection portion and a second strain sensor mounted on the second detection portion; the communication part comprises a first communication part and a second communication part, the first communication part corresponds to the first detection part, and the second communication part corresponds to the second detection part; the method further comprises the steps of:
acquiring strain data of the first strain sensor and the second strain sensor;
and calculating the axial stress, the bending stress and the shearing stress of the bolt based on the strain data.
In the bolt stress detection method as described above, optionally, the strain sensor includes a first sub-strain sensor, a second sub-strain sensor, and a third sub-strain sensor, and strain data of the first strain sensor is: epsilon A1 、ε A2 、ε A3 The method comprises the steps of carrying out a first treatment on the surface of the The strain data of the second strain sensor is: epsilon B1 、ε B2 、ε B3 ；
Axial stress sigma of the bolt m The method meets the following conditions:
the bolt is pulled on the side of the second strain sensor, the bolt is pressed on the side of the first strain sensor, and the bending stress sigma of the bolt b The method meets the following conditions:
maximum shear stress τ of the bolt max The method meets the following conditions:
wherein (1)>
Wherein E is the elastic modulus of the bolt material, and mu is the Poisson's ratio of the bolt material.
The application provides a bolt stress detection assembly and a stress detection method, wherein the bolt stress detection assembly comprises a bolt, a gasket and a strain sensor; the bolt comprises a bolt head and a screw rod, the bolt head is arranged at one end of the screw rod, the screw rod comprises a polished rod section and a thread section, the polished rod section is connected with the bolt head, the thread section is positioned at one end of the polished rod section, which is away from the bolt head, and the gasket is sleeved at the outer side of the polished rod section; the polished rod section is provided with at least one detection part, the strain sensor is arranged on the detection part, a gap is formed between the detection part and the gasket, the gasket is provided with a communication part used for communicating with the external environment, and a lead of the strain sensor is used for being connected with external detection equipment after passing through the gap and the communication part. According to the detection device, the detection part is processed on the polish rod section of the bolt, the gasket is sleeved on the outer side of the polish rod section, a gap is formed between the detection part and the gasket, the communication part is formed on the gasket, and therefore the lead wire of the strain sensor arranged on the detection part can be used for connecting external detection equipment through the gap and the communication part, detection of bolt stress is achieved on the premise that the structure of the bolt is not damaged, and accuracy of bolt stress detection data is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the following description will briefly describe the drawings that are required to be used in the embodiments or the related technical descriptions, and it is obvious that, in the following description, the drawings are some embodiments of the present application, and other drawings may be obtained according to these drawings without any inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a part of a main driving device of a heading machine;
FIG. 2 is a simplified schematic diagram of a bolt stress detection assembly according to an embodiment of the present application;
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a simplified schematic illustration of a bolt stress detection assembly according to another embodiment of the present application;
FIG. 5 is a cross-sectional view of FIG. 4;
FIG. 6 is a simplified diagram of a connection structure of a strain sensor and a bolt according to an embodiment of the present application;
fig. 7 is a flowchart of a method for detecting bolt stress according to an embodiment of the present application.
Reference numerals:
10-an electric motor;
20-speed reducer;
30-pinion gear;
41-inner ring; 42-a first outer race; 43-a second outer race; 44-a connecting ring;
50-a cutter flange;
100-bolts; 110-bolt head; 120-screw; 121-a polish rod section; 1210—a detection section; 122-thread segments; 130-gap;
200-a gasket; 210-a communication part;
300-strain sensor; 301-leading wire; 310-a first sub-strain sensor; 320-a second sub-strain sensor; 330-a third sub-strain sensor; 340-rubber layer.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments.
All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. The following embodiments and features of the embodiments may be combined with each other without conflict.
As described in the background art, when the stress of the bolt is detected in the related art, since the through hole needs to be drilled on the surface of the bolt, the internal structure of the bolt is damaged, and the strength of the bolt is reduced, so that the detected stress of the bolt deviates from the actual stress of the bolt.
In view of this, the embodiment of the application aims at providing a bolt stress detection assembly and a stress detection method, through processing out the detection portion on the polished rod section of bolt, cover in the outside of polished rod section and establish the gasket, be formed with the clearance between detection portion and the gasket, set up the intercommunication portion on the gasket to make the lead wire of installing the strain sensor on the detection portion can be used for connecting outside check out test set behind clearance and the intercommunication portion, realized the detection to bolt stress under the prerequisite of not destroying the structure of bolt, be favorable to improving the accuracy of bolt stress detection data.
The following detailed description of embodiments of the present application will be presented in conjunction with the accompanying drawings to enable one skilled in the art to more fully understand the present application.
FIG. 2 is a simplified schematic diagram of a bolt stress detection assembly according to an embodiment of the present application; FIG. 3 is a cross-sectional view of FIG. 2; FIG. 4 is a simplified schematic illustration of a bolt stress detection assembly according to another embodiment of the present application; FIG. 5 is a cross-sectional view of FIG. 4; fig. 6 is a schematic diagram of a connection structure of a strain sensor and a bolt according to an embodiment of the present application.
Referring to fig. 2-6, the present embodiment provides a bolt stress detecting assembly including a bolt 100, a spacer 200 and a strain sensor 300. The bolt 100 includes a bolt head 110 and a screw 120, the bolt head 110 is disposed at one end of the screw 120, the bolt head 110 may be in a regular hexagonal body shape, and the screw 120 is disposed coaxially with the bolt head 110. The screw 120 comprises a polish rod section 121 and a thread section 122, both of which are cylindrical; the polish rod section 121 is connected to the bolt head 110, and the threaded section 122 is located at an end of the polish rod section 121 facing away from the bolt head 110. The polish rod segment 121 may be formed by grinding off threads on the screw 120 proximate the bolt head 110; the length of the polish rod section 121 ensures that the strain sensor 300 can be installed. The gasket 200 is sleeved on the outer side of the polish rod section 121, and connection and fixation between the gasket 200 and the polish rod section 121 can be realized in an interference connection mode and the like. The polished rod section 121 is provided with at least one detecting portion 1210, the strain sensor 300 is mounted on the detecting portion 1210, and a gap 130 is formed between the detecting portion 1210 and the spacer 200, that is, the detecting portion 1210 is a recess formed on the polished rod section 121, and may be in a groove or a plane shape. The spacer 200 is provided with a communication portion 210 for communicating with the external environment, and a lead 301 of the strain sensor 300 is connected to an external detection device after passing through the gap 130 and the communication portion 210.
According to the embodiment, the detection part 1210 is processed on the polished rod section 121 of the bolt 100, the gasket 200 is sleeved on the outer side of the polished rod section 121, the gap 130 is formed between the detection part 1210 and the gasket 200, and the communication part 210 is arranged on the gasket 200, so that the lead 301 of the strain sensor 300 mounted on the detection part 1210 can be connected with external detection equipment through the gap 130 and the communication part 210, the gasket 200 can prevent other parts from impacting the strain sensor 300 or the lead 301 in the detection process, and can avoid opening holes in the bolt head 110 and/or the screw 120, so that the detection of the stress of the bolt 100 is realized on the premise of not damaging the structure of the bolt 100, the test bolt can be maximally close to the bolt in the actual operation process, and the accuracy of the stress detection data of the bolt 100 is improved.
In one possible embodiment, as shown in fig. 2 and 3, the communication portion 210 of the present embodiment may be a through hole provided in the gasket 200, the through hole being provided perpendicular to the axis of the bolt 100 and perpendicular to the gap 130. The structure of the present embodiment can draw out the lead 301 from the through hole to communicate with an external inspection apparatus. The structure of the embodiment can also ensure that a larger contact area exists between the bolt head 110 and the gasket 200, increase the friction force between the bolt head 110 and the gasket 200, prevent the bolt 100 from sliding in the testing process, and reduce the abrasion of the bolt 100 to the components.
In another possible embodiment, as shown in fig. 4 and 5, the communication portion 210 of the present embodiment may also be a groove provided on the surface of the spacer 200, the groove being located on the side of the spacer 200 facing the bolt head 110. The structure of the present embodiment can draw out the lead 301 from the groove so as to communicate with an external inspection apparatus. The structure of the present embodiment is an open structure, thus facilitating assembly of the strain sensor 300 with the bolt 100.
In one possible implementation, please continue to refer to fig. 2-5, the detecting portion 1210 of the present embodiment includes a first detecting portion and a second detecting portion, where the first detecting portion and the second detecting portion are symmetrically disposed with respect to the axis of the bolt 100, and the strain sensor 300 includes a first strain sensor mounted on the first detecting portion and a second strain sensor mounted on the second detecting portion; the communication portion 210 includes a first communication portion corresponding to the first detection portion and a second communication portion corresponding to the second detection portion. That is, the present embodiment includes two sets of strain sensors 300 symmetrically disposed, so that the axial stress, bending stress, and shearing stress of the bolt 100 can be calculated from the strain data of the first strain sensor and the second strain sensor.
In one possible implementation, as shown in fig. 6, the detecting portion 1210 of the present embodiment is a plane parallel to the axis of the bolt 100, and the strain sensor 300 is mounted on the plane.
Further, the strain sensor 300 of the present embodiment may be a three-way strain gauge, including a first sub-strain sensor 310, a second sub-strain sensor 320 and a third sub-strain sensor 330, the second sub-strain sensor 320 is located between the first sub-strain sensor 310 and the third sub-strain sensor 330, the second sub-strain sensor 320 is parallel to the axis of the bolt 100, the angle between the first sub-strain sensor 310 and the second sub-strain sensor 320 is 45 °, and the angle between the third sub-strain sensor 330 and the second sub-strain sensor 320 is 45 °. The strain sensor 300 may employ a wheatstone bridge to connect the leads 301 to external sensing devices to reduce data acquisition errors.
In one possible embodiment, the strain sensor 300 is adhered to the detecting portion 1210, and the surface of the strain sensor 300 is further provided with a rubber layer 340 and a shielding layer. Specifically, before the sticking, the detecting unit 1210 is wiped with alcohol to remove the abrasive dust on the surface; then, the strain sensor 300 is stuck to the detecting part 1210 by using glue; then, a rubber layer 340 is smeared on the surface of the strain sensor 300 for waterproof treatment; finally, the tinfoil paper on one side is covered as a shielding layer to isolate the environmental interference and the electromagnetic interference.
Fig. 7 is a flowchart of a method for detecting bolt stress according to an embodiment of the present application.
Referring to fig. 7, the present embodiment further provides a method for detecting bolt stress, including:
step S110, providing a bolt, wherein the bolt comprises a bolt head and a screw rod, the bolt head is arranged at one end of the screw rod, the screw rod comprises a polished rod section and a thread section, the polished rod section is connected with the bolt head, the thread section is positioned at one end of the polished rod section deviating from the bolt head, and at least one detection part is arranged on the polished rod section.
Step S120, the strain sensor is mounted on the detection part.
And S130, sleeving the gasket on the outer side of the polish rod section, forming a gap between the detection part and the gasket, and arranging a communication part for communicating with the external environment on the gasket, wherein a lead of the strain sensor is connected with external detection equipment after passing through the gap and the communication part.
The method of the present embodiment may be applied to the bolt stress detection assembly of the above embodiment, and the specific structure thereof is described in detail in the above embodiment, which is not repeated here.
When the method of the embodiment is adopted to detect the stress of the bolt, the position of the measuring point is under the action of a static load before the main driving device works, and is under the action of a dynamic load after the main driving device works, namely the strain sensor is in a loaded state in an initial state, the stress average value has little influence on the service life of the bolt, and the stress amplitude value really influences the service life of the bolt, so that zero drift processing is needed to be carried out on the acquired data, and the influence of the static load is eliminated. Because the installation position of the bolt 100 is close to the motor 10 and can receive strong electromagnetic interference, the high-frequency interference in the measuring process is filtered by adopting low-pass filtering, clutter on the electromagnetic interference coverage is filtered as much as possible by adopting morphological filtering, and the relative authenticity of the signal after interference filtering is ensured.
Further, the method of the embodiment further includes:
strain data of the first strain sensor and the second strain sensor are acquired.
The axial stress, bending stress and shearing stress of the bolt are calculated based on the strain data.
Since the strain sensor includes the first sub-strain sensor, the second sub-strain sensor and the third sub-strain sensor, for convenience of distinction, strain data of the first strain sensor is: epsilon A1 、ε A2 、ε A3 The method comprises the steps of carrying out a first treatment on the surface of the The strain data of the second strain sensor are: epsilon B1 、ε B2 、ε B3 。
In this embodiment, the axial stress σ of the bolt m The method meets the following conditions:
assuming that the bolt is pulled on the second strain sensor side and pressed on the first strain sensor side, the bending stress sigma of the bolt b The method meets the following conditions:
maximum shear stress τ of bolt max The method meets the following conditions:
wherein the maximum principal stress->Minimum principal stress
Wherein E is the elastic modulus of the bolt material, and mu is the Poisson's ratio of the bolt material.
The bolt stress detection method of the embodiment realizes detection of the bolt stress on the premise of not damaging the structure of the bolt, so that the test bolt can be maximally close to the bolt in the actual operation process, and the accuracy of bolt stress detection data is improved.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
In this application, unless specifically stated 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 formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in the description of the present application, the terms "first," "second," and the like are merely used for convenience in describing the various components and are not to be construed as indicating or implying a sequential relationship, 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 at least one such feature.
In this application, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are only needed to see each other.
In the description of the present application, descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this application, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The bolt stress detection assembly is characterized by comprising a bolt, a gasket and a strain sensor; the bolt comprises a bolt head and a screw rod, the bolt head is arranged at one end of the screw rod, the screw rod comprises a polish rod section and a thread section, the polish rod section is connected with the bolt head, the thread section is positioned at one end of the polish rod section, which is away from the bolt head, and the gasket is sleeved at the outer side of the polish rod section; the novel polishing rod is characterized in that at least one detection part is arranged on the polish rod section, the strain sensor is arranged on the detection part, a gap is formed between the detection part and the gasket, a communication part used for communicating with the external environment is arranged on the gasket, and a lead of the strain sensor is used for being connected with external detection equipment after passing through the gap and the communication part.
2. The bolt stress detection assembly of claim 1, wherein the communication is a through hole disposed within the washer.
3. The bolt stress detection assembly of claim 1, wherein the communication is a groove provided in a surface of the washer, the groove being located on a side of the washer facing the bolt head.
4. A bolt stress testing assembly according to any one of claims 1 to 3 wherein the sensing portion is a plane parallel to the axis of the bolt, the strain sensor being mounted on the plane.
5. The bolt stress detection assembly of claim 4, wherein the detection portion comprises a first detection portion and a second detection portion symmetrically disposed about an axis of the bolt, the strain sensor comprising a first strain sensor mounted on the first detection portion and a second strain sensor mounted on the second detection portion;
the communication part comprises a first communication part and a second communication part, the first communication part corresponds to the first detection part, and the second communication part corresponds to the second detection part.
6. The bolt stress detection assembly of claim 5, wherein the strain sensor comprises a first sub-strain sensor, a second sub-strain sensor, and a third sub-strain sensor, the second sub-strain sensor being located between the first sub-strain sensor and the third sub-strain sensor, the second sub-strain sensor being parallel to an axis of the bolt, an angle between the first sub-strain sensor and the second sub-strain sensor being 45 °, and an angle between the third sub-strain sensor and the second sub-strain sensor being 45 °.
7. The bolt stress detection assembly of claim 6, wherein the strain sensor is attached to the detection portion, and a rubber layer and a shielding layer are further provided on a surface of the strain sensor.
8. A method of bolt stress detection comprising:
providing a bolt, wherein the bolt comprises a bolt head and a screw rod, the bolt head is arranged at one end of the screw rod, the screw rod comprises a polished rod section and a thread section, the polished rod section is connected with the bolt head, the thread section is positioned at one end of the polished rod section, which is away from the bolt head, and at least one detection part is arranged on the polished rod section;
mounting a strain sensor on the detection portion;
the gasket is sleeved on the outer side of the polish rod section, a gap is formed between the detection part and the gasket, a communication part used for communicating with the external environment is arranged on the gasket, and a lead of the strain sensor is connected with external detection equipment after passing through the gap and the communication part.
9. The method of claim 8, wherein the detecting portion includes a first detecting portion and a second detecting portion symmetrically disposed with respect to an axis of the bolt, and the strain sensor includes a first strain sensor mounted on the first detecting portion and a second strain sensor mounted on the second detecting portion; the communication part comprises a first communication part and a second communication part, the first communication part corresponds to the first detection part, and the second communication part corresponds to the second detection part; the method further comprises the steps of:
acquiring strain data of the first strain sensor and the second strain sensor;
and calculating the axial stress, the bending stress and the shearing stress of the bolt based on the strain data.
10. The method of claim 9, wherein the strain sensor comprises a first sub-strain sensor, a second sub-strain sensor, and a third sub-strain sensor, and wherein the strain data of the first strain sensor is：ε A1 、ε A2 、ε A3 The method comprises the steps of carrying out a first treatment on the surface of the The strain data of the second strain sensor is: epsilon B1 、ε B2 、ε B3 ；
Axial stress sigma of the bolt m The method meets the following conditions:
the bolt is pulled on the side of the second strain sensor, the bolt is pressed on the side of the first strain sensor, and the bending stress sigma of the bolt b The method meets the following conditions:
maximum shear stress τ of the bolt max The method meets the following conditions:
wherein (1)>
Wherein E is the elastic modulus of the bolt material, and mu is the Poisson's ratio of the bolt material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310692125.4A CN116499629A (en) | 2023-06-12 | 2023-06-12 | Bolt stress detection assembly and stress detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310692125.4A CN116499629A (en) | 2023-06-12 | 2023-06-12 | Bolt stress detection assembly and stress detection method |
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| CN116499629A true CN116499629A (en) | 2023-07-28 |
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| CN202310692125.4A Pending CN116499629A (en) | 2023-06-12 | 2023-06-12 | Bolt stress detection assembly and stress detection method |
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| Country | Link |
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| CN (1) | CN116499629A (en) |
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