A sealed pressure impact sensor based on a friction nanogenerator

Abstract

The application belongs to the technical field of sensors and provides a sealed pressure impact sensor based on a friction nanogenerator, which comprises an upper bearing flange and a lower bearing flange and further comprises a cover plate, an insulating film attached to the lower surface of the cover plate, a copper film electrode attached to the lower surface of the insulating film, a dielectric layer attached to the lower surface of the copper film electrode, an elastic ring with the upper surface thereof attached to the lower surface of the dielectric layer, an elastic ball arranged in the elastic ring, and an insulating sheet attached to the lower surface of the elastic ring. The application can detect the pressure condition inside a sealed device and can also detect the leakage of the sealed device. The sealed pressure impact sensor based on the friction nanogenerator can realize self-power supply by using the characteristics of the friction nanogenerator. In the case where the precision meets the requirements, the cost is relatively lower than other detection methods, and the application has a wide application prospect.

Description

Technical Field

[0001] This invention belongs to the field of sensor technology, and particularly relates to a sealed pressure impact sensor based on a triboelectric nanogenerator. Background Technology

[0002] Mechanical seals are used to seal fluids in equipment and piping systems, preventing leakage into the environment. This is crucial for environmental protection, safety, and preventing material loss. Pressure testing is closely related to mechanical seals. It allows for the evaluation of seal effectiveness, detection of leaks, pressure balancing, and the establishment of early warning systems to ensure the proper functioning of mechanical seals and system safety. However, existing methods for detecting leaks or pressure in sealing devices suffer from numerous problems, including limited accuracy, slow response time, installation complexity, maintenance difficulties, and high costs.

[0003] Triboelectric nanogenerators employ a novel method to convert mechanical energy into electrical energy. When two materials with different electron-gaining and electron-losing abilities rub against each other or separate upon contact, charge transfer occurs on their surfaces, generating an electric current. Different degrees of relative motion between the materials produce different potential differences. This process converts mechanical energy, widely present in the natural environment, into electrical energy to power small electronic devices or portable equipment, while the voltage signal reflects the relative motion. Therefore, triboelectric nanogenerators can be used for sealing pressure and leak detection, enabling self-powered detection.

[0004] Existing triboelectric nanogenerators suffer from limitations such as simple structure, inability to detect pressure in sealed devices, and leakage issues. Furthermore, current technologies place high demands on the manufacturing of triboelectric nanogenerators, indirectly increasing costs and hindering their industrial application. Therefore, we propose a sealing pressure impact sensor based on a triboelectric nanogenerator. Summary of the Invention

[0005] The purpose of this invention is to provide a sealed pressure impact sensor based on a triboelectric nanogenerator, which aims to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A sealed pressure impact sensor based on a triboelectric nanogenerator includes an upper bearing flange and a lower bearing flange, and further includes: The cover plate is cylindrical in shape and is fixedly connected to the upper bearing flange. An insulating film is pasted onto the lower surface of the cover plate; Copper film electrodes are attached to the lower surface of the insulating film; The dielectric layer is attached to the lower surface of the copper film electrode; An elastic ring is disposed inside the cover plate, the upper surface of the elastic ring is bonded to the lower surface of the dielectric layer, and the outer diameter of the elastic ring is slightly smaller than the inner diameter of the cover plate; An elastic ball is disposed inside an elastic ring, the diameter of which is slightly smaller than the inner diameter of the elastic ring; An insulating sheet is attached to the lower surface of the elastic ring; Both the upper and lower bearing flanges are flange-shaped. The upper bearing flange has a boss on its upper part and a through hole in its center. The lower bearing flange has a cylindrical passage pipe in its center.

[0007] Furthermore, the insulating film, copper film electrode, dielectric layer, and insulating sheet all have the same diameter and a thickness of 0.1 mm.

[0008] Furthermore, the insulating film, copper film electrode, dielectric layer, and insulating sheet are all circular thin films.

[0009] Furthermore, the elastic ball is circular in the radial plane of the cover plate and elliptical in the axial plane of the upper cover.

[0010] Furthermore, six through holes are evenly distributed on the outer base of the upper bearing flange and six through holes are evenly distributed on the outer base of the lower bearing flange.

[0011] Furthermore, it also includes fastening bolts and fastening nuts, and the through holes on the lower bearing flange and the upper bearing flange are fastened together by fastening bolts and fastening nuts.

[0012] Furthermore, the cover plate, the upper bearing flange, and the lower bearing flange are all made of titanium alloy, and the dielectric layer is made of polytetrafluoroethylene.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This sealing pressure impact sensor based on triboelectric nanogenerator can detect the internal pressure of a sealing device and also detect leaks in the sealing device. Utilizing the characteristics of triboelectric nanogenerators, the sealing pressure impact sensor based on triboelectric nanogenerators can achieve self-powered operation. At the same time, it is relatively cheaper than other detection methods while meeting the required accuracy, and has broad application prospects. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is an anatomical diagram of the three-dimensional structural parts of the present invention.

[0016] Figure 3 This is a three-dimensional sectional disassembly diagram of the present invention.

[0017] Figure 4 This is a schematic diagram illustrating the charge transfer principle of the present invention.

[0018] Figure 5 The output voltage signal diagram is shown for five different pressure impacts applied according to the present invention.

[0019] In the diagram: 1-Cover plate; 2-Upper bearing flange; 3-Insulating film; 4-Copper film electrode; 5-Dielectric layer; 6-Elastic ball; 7-Elastic ring; 8-Insulating sheet; 9-Lower bearing flange; 10-Fasting bolt; 11-Fasting nut. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0022] like Figure 1-3 As shown, a sealed pressure impact sensor based on a triboelectric nanogenerator is provided in one embodiment of the present invention, including an upper bearing flange 2 and a lower bearing flange 9, and further comprising: Cover plate 1, the cover plate 1 is cylindrical in shape, and the cover plate 1 is fixedly connected to the upper bearing flange 2; Insulating film 3 is pasted on the lower surface of cover plate 1; Copper film electrode 4 is attached to the lower surface of insulating film 3; Dielectric layer 5 is attached to the lower surface of copper film electrode 4; An elastic ring 7 is disposed inside the cover plate 1. The upper surface of the elastic ring 7 is bonded to the lower surface of the dielectric layer 5. The outer diameter of the elastic ring 7 is slightly smaller than the inner diameter of the cover plate 1. An elastic ball 6 is disposed inside an elastic ring 7, the diameter of the elastic ball 6 being slightly smaller than the inner diameter of the elastic ring 7; Insulating sheet 8 is attached to the lower surface of elastic ring 7; Both the upper bearing flange 2 and the lower bearing flange 9 are flange-shaped. The upper bearing flange 2 has a boss on its upper part and a through hole in its center. The lower bearing flange 9 has a cylindrical passage pipe in its center.

[0023] In this embodiment of the invention, preferably, the cover plate 1 is fixedly connected to the upper bearing flange 2 by sealant, and the lower surface of the cover plate 1 serves as the attachment for the sensor; the copper film electrode 4, the dielectric layer 5, and the elastic ball 6, three different materials, constitute the basic structure of the triboelectric nanogenerator in single-electrode operation mode. The insulating film 3 serves to prevent the electronic signal from being transferred through the titanium alloy, causing voltage signal instability or distortion. The materials of the elastic ball 6 and the elastic ring 7 can be adjusted according to different detection devices and the maximum pressure of target detection; in this embodiment, silicone is used.

[0024] like Figure 2 and Figure 3 As shown, in a preferred embodiment of the present invention, the insulating film 3, the copper film electrode 4, the dielectric layer 5 and the insulating sheet 8 all have the same diameter and a thickness of 0.1 mm.

[0025] like Figure 2 As shown, in a preferred embodiment of the present invention, the insulating film 3, the copper film electrode 4, the dielectric layer 5 and the insulating sheet 8 are all in the form of a circular thin film.

[0026] like Figure 2 and Figure 3 As shown, in a preferred embodiment of the present invention, the elastic ball 6 is circular in the radial plane of the cover plate 1 and elliptical in the axial plane of the upper cover 1.

[0027] like Figure 1-3 As shown, in a preferred embodiment of the present invention, six through holes are evenly distributed on the outer base of the upper bearing flange 2, and six through holes are evenly distributed on the outer base of the lower bearing flange 9.

[0028] In this embodiment of the invention, preferably, the six through holes evenly distributed on the outer base of the upper bearing flange 2 correspond one-to-one with the six through holes evenly distributed on the outer base of the lower bearing flange 9.

[0029] like Figure 1-3 As shown, in a preferred embodiment of the present invention, it further includes fastening bolts 10 and fastening nuts 11, and the through holes on the lower bearing flange 9 and the upper bearing flange 2 are fastened together by fastening bolts 10 and fastening nuts 11.

[0030] In this embodiment of the invention, the fastening bolt 10 and the fastening nut 11 are used in a threaded connection.

[0031] like Figure 2 and Figure 3 As shown, in a preferred embodiment of the present invention, the cover plate 1, the upper bearing flange 2 and the lower bearing flange 7 are all made of titanium alloy, and the dielectric layer 5 is made of polytetrafluoroethylene.

[0032] In this embodiment of the invention, when the sealed pressure impact sensor based on a triboelectric nanogenerator is working, the primary impact gas in the detection device enters through the lower bearing flange 9, and then the gas enters the upper bearing flange 1. As the gas pressure increases, the gas exerts a compressive force on the insulating sheet 8, thereby exerting a compressive force on the elastic ball 6 and the elastic ring 7. Due to the increased pressure, the elastic ring 7 is compressed, and the contact area between the upper part of the elastic ball 6 and the dielectric layer 5 also increases accordingly. The specific charge transfer is as follows: Figure 4 As shown, simply put, the higher the pressure and the larger the contact area, the greater the voltage generated. This invention conducted sealing pressure tests, applying impact pressures of 0 MPa, 1 MPa, 2 MPa, 3 MPa, 4 MPa, and 5 MPa to the sealing pressure impact sensor based on a triboelectric nanogenerator. The generated voltages are shown below. Figure 5 As shown, the peak voltage signal generally increases with increasing pressure. This demonstrates that the sealing pressure impact sensor based on a triboelectric nanogenerator has the ability to detect the impact pressure of sealing devices and to detect leaks.

[0033] The working principle of this invention is: In this sealed pressure impact sensor based on a triboelectric nanogenerator, during operation, the primary impact gas in the detection device enters through the lower bearing flange 9, and then the gas enters the upper bearing flange 1. As the gas pressure increases, the gas exerts a compressive force on the insulating sheet 8, which in turn exerts a compressive force on the elastic ball 6 and the elastic ring 7. Due to the increased pressure, the elastic ring 7 is compressed, and the contact area between the upper part of the elastic ball 6 and the dielectric layer 5 also increases. The larger the contact area, the greater the voltage generated.

[0034] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A sealed pressure impact sensor based on a triboelectric nanogenerator, comprising an upper bearing flange and a lower bearing flange, characterized in that, Also includes: The cover plate is cylindrical in shape and is fixedly connected to the upper bearing flange. An insulating film is pasted onto the lower surface of the cover plate; Copper film electrodes are attached to the lower surface of the insulating film; The dielectric layer is attached to the lower surface of the copper film electrode; An elastic ring is disposed inside the cover plate, the upper surface of the elastic ring is bonded to the lower surface of the dielectric layer, and the outer diameter of the elastic ring is slightly smaller than the inner diameter of the cover plate; An elastic ball is disposed inside an elastic ring, the diameter of which is slightly smaller than the inner diameter of the elastic ring; An insulating sheet is attached to the lower surface of the elastic ring; Both the upper and lower bearing flanges are flange-shaped. The upper bearing flange has a boss on its upper part and a through hole in its center. The lower bearing flange has a cylindrical passage pipe in its center.

2. The sealed pressure impact sensor based on a triboelectric nanogenerator according to claim 1, characterized in that, The insulating film, copper film electrode, dielectric layer and insulating sheet all have the same diameter and a thickness of 0.1 mm.

3. The sealed pressure impact sensor based on a triboelectric nanogenerator according to claim 1, characterized in that, The insulating film, copper electrode, dielectric layer, and insulating sheet are all circular thin films.

4. The sealed pressure impact sensor based on a triboelectric nanogenerator according to claim 1, characterized in that, The elastic ball is circular in the radial plane of the cover plate and elliptical in the axial plane of the upper cover.

5. The sealed pressure impact sensor based on a triboelectric nanogenerator according to claim 1, characterized in that, The upper bearing flange has six through holes evenly distributed on its outer base, and the lower bearing flange has six through holes evenly distributed on its outer base.

6. The sealed pressure impact sensor based on a triboelectric nanogenerator according to claim 5, characterized in that, It also includes fastening bolts and fastening nuts, and the through holes on the lower bearing flange and the upper bearing flange are fastened together by fastening bolts and fastening nuts.

7. The sealed pressure impact sensor based on a triboelectric nanogenerator according to claim 1, characterized in that, The cover plate, upper bearing flange, and lower bearing flange are all made of titanium alloy, and the dielectric layer is made of polytetrafluoroethylene.

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