CN113969930A - Multi-section high-precision temperature measurement bolt for hydraulic system - Google Patents
Multi-section high-precision temperature measurement bolt for hydraulic system Download PDFInfo
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- CN113969930A CN113969930A CN202111131725.0A CN202111131725A CN113969930A CN 113969930 A CN113969930 A CN 113969930A CN 202111131725 A CN202111131725 A CN 202111131725A CN 113969930 A CN113969930 A CN 113969930A
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- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 38
- 229910001006 Constantan Inorganic materials 0.000 claims abstract description 23
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 17
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 17
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 17
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229920002530 polyetherether ketone Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 239000000758 substrate Substances 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 5
- 238000005137 deposition process Methods 0.000 abstract description 5
- 230000002349 favourable effect Effects 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 30
- 239000010408 film Substances 0.000 description 26
- 239000010409 thin film Substances 0.000 description 14
- 239000000523 sample Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000035876 healing Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000009261 D 400 Substances 0.000 description 3
- 238000001755 magnetron sputter deposition Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000005678 Seebeck effect Effects 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- 239000011253 protective coating Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- 238000004528 spin coating Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
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- 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
Abstract
The invention discloses a multi-section high-precision temperature measuring bolt for a hydraulic system, wherein a constantan film layer is arranged on the front end face of a bolt substrate, a polytetrafluoroethylene coating is arranged on the constantan film layer, a first electrode and a second electrode are arranged in the bolt substrate in a penetrating manner, the first electrode comprises a plurality of electrodes, the electrodes are arranged around the second electrode in an array manner, one ends of the positive electrode of the first electrode and the negative electrode of the second electrode are respectively flush with the front end face of the bolt substrate, and the other ends of the positive electrode of the first electrode and the negative electrode of the second electrode are led out from the rear end of the bolt substrate. The invention solves the temperature measurement defect of the traditional plane film thermocouple, avoids using a curved surface film deposition process and has simple process structure; the multi-node array structure not only improves the spatial temperature measurement resolution of the sensor, but also can improve the abundance of steady-state temperature measurement data sample points, is favorable for improving the comprehensive precision of the sensor, and can be applied to multi-scene temperature measurement of a hydraulic system, a chemical reaction kettle and the like.
Description
Technical Field
The invention belongs to the technical field of sensors, and particularly relates to a multi-section high-precision temperature measuring bolt for a hydraulic system.
Background
The thermocouple temperature sensor is widely applied to the fields of industrial manufacturing, production and life and the like due to the advantages of high temperature measurement precision, passivity, simple structure and the like. With the development of the micro-electro-mechanical system technology, the research on the thin-film thermocouple with small volume and fast response is widely researched due to the two-dimensional thin film of the traditional thermocouple.
The current preparation of the film thermocouple is mainly based on a planar film deposition process and has the advantages of simple structure, good film uniformity and the like. However, the planar thin-film thermocouple is difficult to meet the practical application requirements of miniaturization, convenient installation and the like. The film thermocouple based on a probe type structure is invented by depositing a film on the side surface and the end surface of a cylindrical substrate by utilizing a curved surface film forming technology, and the problem that the traditional plane thermocouple is inconvenient to install and use is well solved by the thermocouple. Because the film is deposited on the curved surface substrate by the thermocouple, the film forming process is complex, the uniformity of the film thickness is poor, and the sensor substrate and the film both use high temperature resistant materials, so the thermocouple has high cost and is not suitable for daily life and industrial production.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-section high-precision temperature measuring bolt for a hydraulic system aiming at the defects in the prior art, and solve the problems that the same type of sensors are single in installation mode, high in cost, difficult to adapt to complex industrial temperature measuring environments and the like.
The invention adopts the following technical scheme:
the utility model provides a high precision temperature measurement bolt of multisection point for hydraulic system, including the bolt basement, the preceding terminal surface of bolt basement is provided with the constantan thin layer, be provided with the polytetrafluoroethylene coating on the constantan thin layer, the inside of bolt basement is run through and is provided with first electrode and second electrode, first electrode includes a plurality ofly, the array sets up around the second electrode, the anodal of first electrode and the negative pole one end of second electrode respectively with the preceding terminal surface parallel and level of bolt basement, the anodal of first electrode is drawn forth from the rear end of bolt basement with the negative pole other end of second electrode.
Specifically, the second electrode is disposed along the center of the bolt base.
Specifically, the number of the first electrodes is at least 3.
Specifically, the bolt base is provided with an electrode mounting hole along the axial direction.
Furthermore, the aperture of the electrode mounting hole is 0.5-1 mm.
Specifically, a filling layer is arranged between the first electrode and the bolt substrate, and between the second electrode and the bolt substrate.
Furthermore, epoxy resin is arranged in the filling layer.
Specifically, the thickness of the polytetrafluoroethylene coating is 10-30 μm.
Specifically, the first electrode is a copper electrode, the second electrode is a constantan electrode, and the surface uniformity of the constantan film layer is more than 5%.
Specifically, the bolt substrate is made of polyether-ether-ketone, high-temperature-resistant plastic or ceramic material.
Compared with the prior art, the invention has at least the following beneficial effects:
the temperature measuring bolt can realize instantaneous temperature measurement in a variable temperature flow field environment, has high spatial resolution, is simple in preparation and packaging method, convenient to install and use and low in cost, the first electrode and the second electrode are axially arranged in the bolt substrate through the epoxy resin filling layer, the healing thin film layer and the polytetrafluoroethylene coating on the end surface are sequentially deposited on the front end surface of the bolt substrate, and the three first electrodes and the three second electrodes form an array structure with three thermal nodes, so that the temperature measuring bolt can be applied to multi-scene temperature measurement of a hydraulic system, a chemical reaction kettle and the like.
Furthermore, three first electrodes 2 and one second electrode 3 which are arranged jointly form three groups of thermocouple electrodes, and the thermoelectric potential of the temperature difference is led out to a signal acquisition circuit.
Further, at least three thermodes are provided. On the one hand, the service life of the temperature measuring bolt can be prolonged, and the temperature measuring reliability can be improved. On the other hand, three first electrodes and one second electrode constitute three groups of thermocouple electrodes jointly, have increased the data abundance of measuring temperature, are favorable to promoting the temperature measurement precision.
Furthermore, an electrode mounting hole is formed in the bolt substrate in the axial direction and used for leading out an electrode in the axial direction of the bolt, the integrity of the threaded part of the bolt is kept, and the bolt is convenient to actually mount and use.
Further, the aperture of the electrode mounting hole is used for mounting four thermodes, and the aperture depends on the diameter of the thermode.
Furthermore, the aperture of the electrode mounting hole is slightly larger than the diameter of the mounted thermode, and the arranged filling layer can be used for filling the gap between the thermode and the electrode mounting hole, so that the purpose of sealing in a liquid or gas temperature measurement environment is achieved.
Furthermore, the epoxy resin is cured under the action of the polyether amine curing agent, and the formed filling layer has the advantages of high temperature resistance, high strength, high adhesion and the like and is used for measuring the temperature in a high-pressure environment.
Furthermore, the thickness of the polytetrafluoroethylene coating is 10-30 microns, so that the good protection effect is achieved, and the temperature measurement response time is not greatly interfered.
Furthermore, the first electrode is a copper electrode, the second electrode is a constantan electrode which are all cheap metal materials, and the method has low cost and is easy for large-scale manufacturing. The end-face constantan film layer is deposited by a magnetron sputtering technology, the surface uniformity of the end-face constantan film layer is better than 5%, the thermal stress generated by the film at high temperature is reduced, and the service life of the film is ensured.
Furthermore, the bolt substrate is prepared from polyether-ether-ketone, high-temperature-resistant plastic or ceramic material, and the polyether-ether-ketone plastic is high-temperature-resistant, has excellent thermal mechanical stability and electrical insulation, and ensures that the temperature-measuring bolt works stably in a high-temperature environment.
In summary, the invention is based on the array principle of the thin film thermocouple, all the thermodes are axially arranged in the bolt substrate, and the thermode material is deposited on the end surface by the magnetron sputtering technology, so that the rapid temperature measurement bolt with a plurality of temperature measurement nodes is formed. The temperature measurement defect of the traditional planar film thermocouple is overcome, the curved surface film deposition process is avoided, and the process structure is simple; the multi-node array structure not only improves the spatial temperature measurement resolution of the sensor, but also can improve the abundance of steady-state temperature measurement data sample points, is favorable for improving the comprehensive precision of the sensor, and can be applied to multi-scene temperature measurement of a hydraulic system, a chemical reaction kettle and the like.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic diagram of a diagonal secondary structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
FIG. 4 is a graph of temperature measurement data according to the present invention.
Wherein: 1. a bolt base; 2. a first electrode; 3. a second electrode; 4. a filling layer; 5. a constantan thin film layer; 6. and (3) coating polytetrafluoroethylene.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
The invention provides a multi-node high-precision temperature measuring bolt for a hydraulic system, which is based on the array principle of a thin-film thermocouple. The structure not only solves the temperature measurement defect of the traditional plane film thermocouple, but also avoids using a curved surface film deposition process, and has simple process structure; the multi-node array structure not only improves the spatial temperature measurement resolution of the sensor, but also can improve the abundance of steady-state temperature measurement data sample points, is favorable for improving the comprehensive precision of the sensor, and can be applied to multi-scene temperature measurement of a hydraulic system, a chemical reaction kettle and the like.
Referring to fig. 1, 2 and 3, the multi-node high-precision temperature measuring bolt for a hydraulic system according to the present invention includes a bolt base 1, a first electrode 2, a second electrode 3, a filling layer 4, a constantan film layer 5, and a teflon coating layer 6.
The three first electrodes 2 and the second electrode 3 are axially arranged in the bolt substrate 1 through the epoxy resin filling layer 4, the healing thin film layer 5 and the polytetrafluoroethylene coating 6 of the end face are sequentially deposited on the front end face of the bolt substrate 1, the array structure with three thermal nodes is formed by the healing thin film layer and the three first electrodes 2 and the second electrode 3, and the array structure can be applied to multi-scene temperature measurement of a hydraulic system, a chemical reaction kettle and the like.
The bolt substrate (1) is prepared from polyether-ether-ketone, high-temperature-resistant plastic or ceramic material.
The first electrode 2 is copper electrode, and the second electrode 3 is constantan electrode
The bolt substrate 1 is made of high-end engineering plastic polyether-ether-ketone into a standard bolt type and is prepared by machining or injection molding, the structural size meets the national standard of GB 5783-.
The temperature sensing part of the temperature measuring bolt comprises three first electrodes 2, one second electrode 3 and an end face healing thin film layer 5, the first electrodes 2 and the second electrodes 3 are of a three-dimensional array structure, the wire diameter of the positive pole of the first electrode 2 and the negative pole of the second electrode 3 is 1-0.5 mm, one end of the positive pole of the first electrode 2 and the negative pole of the second electrode 3 is flush with the front end face of the bolt substrate 1, and the other end of the first electrode 2 is led out from the rear end of the bolt through an electrode hole in the bolt substrate 1.
Preferably, the first electrode 2 is pure copper and the second electrode 3 is constantan alloy consisting of 55% copper and 45% nickel by mass. The conformal thin film layer 5 on the end surface is prepared by magnetron sputtering, and the surface uniformity is superior to 5%.
The filling layer 4 is filled with a mixture of E51 type epoxy resin and curing agent polyetheramine D-400, wherein the mass ratio of the E51 type epoxy resin to the curing agent polyetheramine D-400 is 100: 0.56, E51 type epoxy resin and curing agent polyetheramine D-400 are mixed and filled into the gap between the electrode and the electrode hole, and are cured for 10 to 20 hours at 50 to 80 ℃ to form an epoxy resin filling layer for physical support of the hot electrode.
The constantan thin film layer 5 is arranged on the front end face of the bolt substrate 1, the polytetrafluoroethylene coating 6 is arranged on the surface of the constantan thin film layer 5, the polytetrafluoroethylene coating 6 is polytetrafluoroethylene emulsion, the polytetrafluoroethylene emulsion is coated on the constantan thin film layer 5 through a spin coating mode, and the polytetrafluoroethylene coating is kept stand for 2 hours at normal temperature to form a 10-30 mu m polytetrafluoroethylene protective coating.
The working process of the multi-section high-precision temperature measuring bolt for the hydraulic system is as follows:
the medium to be measured contacts the polytetrafluoroethylene coating 6, heat flow is conducted to the constantan film layer 5 through the polytetrafluoroethylene coating 6 in modes of heat radiation, heat convection or heat conduction and the like, so that the temperature of the constantan film layer 5 is quickly consistent with the temperature of the medium to be measured, namely three groups of film thermocouple hot ends consisting of the constantan film layer 5, three first electrodes 2 and one second electrode 3 are heated to the temperature to be measured, temperature difference thermoelectric potential is generated in a loop according to the Seebeck effect, a voltage signal is led out from the tail end of the electrode, and the sensor can obtain the shape of E-alpha (T-alpha) after being calibratedh-Tc) The temperature difference-thermoelectric potential primary relation curve of (1); where E is the thermoelectric potential of temperature difference, alpha is the Seebeck coefficient, obtained by calibration, ThIs the hot end temperature, i.e. the temperature to be measured, TcThe temperature of the cold end is directly measured by a digital temperature chip at the cold end. And obtaining the actual temperature value to be measured according to the calibrated thermoelectric relation.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 4, the multi-node array structure not only improves the spatial temperature measurement resolution of the sensor, but also improves the abundance of the steady-state temperature measurement data sample points, which is beneficial to improving the comprehensive accuracy of the sensor. As shown in the figure, the temperature measurement precision of a single temperature measurement node is only 0.5% of the full range at the maximum within the range of-80-70 ℃. After the data processing algorithm is used for processing, the comprehensive temperature measurement precision of the multi-node temperature measurement bolt is improved to 0.25% of the full range, and the temperature measurement precision is greatly improved.
In conclusion, the multi-section high-precision temperature measuring bolt for the hydraulic system not only overcomes the temperature measuring defect of the traditional planar film thermocouple, but also avoids the use of a curved surface film deposition process, and has a simple process structure; the multi-node array structure not only improves the spatial temperature measurement resolution of the sensor, but also can improve the abundance of steady-state temperature measurement data sample points, is favorable for improving the comprehensive precision of the sensor, and can be applied to multi-scene temperature measurement of a hydraulic system, a chemical reaction kettle and the like.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a high accuracy temperature measurement bolt of multisection point for hydraulic system, a serial communication port, including bolt basement (1), the preceding terminal surface of bolt basement (1) is provided with constantan thin layer (5), be provided with polytetrafluoroethylene coating (6) on constantan thin layer (5), the inside of bolt basement (1) is run through and is provided with first electrode (2) and second electrode (3), first electrode (2) are including a plurality ofly, the array sets up around second electrode (3), the anodal of first electrode (2) and the negative pole one end of second electrode (3) respectively with the preceding terminal surface parallel and level of bolt basement (1), the anodal of first electrode (2) and the negative pole other end of second electrode (3) are drawn forth from the rear end of bolt basement (1).
2. The multi-nodal high accuracy temperature measuring bolt for hydraulic system according to claim 1, characterized in that the second electrode (3) is arranged along the center of the bolt base (1).
3. The multi-nodal high accuracy temperature measuring bolt for hydraulic system according to claim 1, characterized in that the first electrode (2) comprises at least 3.
4. The multi-node high-precision temperature measuring bolt for the hydraulic system according to claim 1, characterized in that the bolt base (1) is provided with an electrode mounting hole along the axial direction.
5. The multi-node high-precision temperature measurement bolt for the hydraulic system according to claim 4, wherein the diameter of the electrode mounting hole is 0.5-1 mm.
6. The multi-node high-precision temperature measuring bolt for the hydraulic system according to claim 1, characterized in that a filling layer (4) is arranged between the first electrode (2) and the second electrode (3) and the bolt base (1).
7. The multi-node high-precision temperature measuring bolt for the hydraulic system as recited in claim 6, characterized in that epoxy resin is provided in the filling layer (4).
8. The multi-node high-precision temperature measuring bolt for the hydraulic system as recited in claim 1, characterized in that the thickness of the polytetrafluoroethylene coating (6) is 10-30 μm.
9. The multi-node high-precision temperature measuring bolt for the hydraulic system according to claim 1, characterized in that the first electrode (2) is a copper electrode, the second electrode (3) is a constantan electrode, and the surface uniformity of the constantan film layer (5) is more than 5%.
10. The multi-node high-precision temperature measurement bolt for the hydraulic system according to claim 1, characterized in that the bolt base (1) is made of polyetheretherketone, high temperature resistant plastic or ceramic material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111131725.0A CN113969930A (en) | 2021-09-26 | 2021-09-26 | Multi-section high-precision temperature measurement bolt for hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111131725.0A CN113969930A (en) | 2021-09-26 | 2021-09-26 | Multi-section high-precision temperature measurement bolt for hydraulic system |
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| CN113969930A true CN113969930A (en) | 2022-01-25 |
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| CN202111131725.0A Pending CN113969930A (en) | 2021-09-26 | 2021-09-26 | Multi-section high-precision temperature measurement bolt for hydraulic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114894368A (en) * | 2022-05-09 | 2022-08-12 | 航天精工股份有限公司 | Bolt shear circumferential distribution measuring method based on array film rotation calibration |
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|---|---|---|---|---|
| CN114894368A (en) * | 2022-05-09 | 2022-08-12 | 航天精工股份有限公司 | Bolt shear circumferential distribution measuring method based on array film rotation calibration |
| CN114894368B (en) * | 2022-05-09 | 2022-12-27 | 航天精工股份有限公司 | Bolt shear circumferential distribution measuring method based on array film rotation calibration |
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Application publication date: 20220125 |