CN113572386B - Strip-shaped friction nano generator for monitoring broken teeth - Google Patents

Abstract

The invention discloses a strip-shaped friction nano generator for monitoring broken teeth, which relates to the technical field of nano generators and comprises the following components: a base; the detection part comprises a first rotating shaft, a detection wheel, a conductive sliding ring and a friction conductor piece, wherein two ends of the first rotating shaft are fixed on the base through first supporting seats, the detection wheel and the conductive sliding ring are fixedly arranged on the first rotating shaft, the friction conductor piece is sequentially wound on the surface of the detection wheel along the axial direction of the first rotating shaft, and two ends of the friction conductor piece are connected with the conductive sliding ring; a second rotating shaft for fixing the gear to be detected, each tooth top of the gear to be detected being capable of contacting the friction conductor member fixed on the surface of the detection wheel during the detection; and the transmission part is used for realizing the linkage of the first rotating shaft and the second rotating shaft. The invention contacts the gear tooth top of the detected gear with the friction conductor in the detection process and generates an electric signal, thereby realizing the detection of the broken gear state of the detected gear.

Description

A strip-shaped friction nanogenerator for tooth-broken monitoring

technical field

The invention relates to the technical field of nanogenerators, in particular to a strip-shaped frictional nanogenerator used for monitoring broken teeth.

Background technique

As an important mechanical transmission mode, gear transmission is widely used in aerospace, transportation engineering, agricultural engineering and many other fields. However, gears are usually used in a sealed environment, such as gearbox gears. Therefore, it is difficult to detect the broken teeth of the gears, which will lead to further damage to the entire gearbox and cause greater losses.

It can be seen that there is great practical value in the monitoring of gear broken tooth failure. Most of the existing gear failure monitoring needs to provide electric energy, which brings energy waste and increases the difficulty of monitoring implementation. The friction nanogenerator can generate electricity through the principle of contact electrification and electrostatic induction, which is very suitable as an automatic Powered sensors are used to monitor gears for tooth failure.

However, the existing triboelectric nanogenerators are usually only applicable to specific scenarios, and often need to be redesigned and manufactured after changing the working scenario.

Therefore, how to provide a triboelectric nanogenerator that has strong adaptability, self-power supply, and can be used for monitoring broken teeth is an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the present invention provides a bar-shaped friction nanogenerator for tooth-broken monitoring, aiming to solve one of the problems in the above-mentioned background technology. caused by secondary failures.

In order to achieve the above object, the present invention adopts the following technical solutions:

A bar-shaped friction nanogenerator for monitoring broken teeth, comprising:

base;

A detection part, the detection part includes a first rotating shaft, a detection wheel, a conductive slip ring and a friction conductor, both ends of the first rotating shaft are fixed on the base through a first support seat, and the first The rotating shaft is rotatably connected to the first support seat, the detection wheel and the conductive slip ring are fixedly arranged on the first rotating shaft, and the friction conductors are sequentially wound along the axial direction of the first rotating shaft on the surface of the detection wheel, and the two ends of the friction conductor are connected to the conductive slip ring;

It is used to fix the second rotating shaft of the gear to be detected, the two ends of the second rotating shaft are fixedly connected with the base through the second supporting seat respectively, the second rotating shaft is rotationally connected with the second supporting seat, and the The second rotating shaft is arranged parallel to the first rotating shaft, and during the detection process, each tooth top of the detected gear can be in contact with the friction conductor fixed on the surface of the detection wheel;

A transmission part, the transmission part is used to realize the linkage between the first rotation shaft and the second rotation shaft.

Further, the number of friction conductors on the surface of the detection wheel along its axial direction is equal to the number of teeth of the detected gear, and the radius of the addendum circle of the detected gear is the same as that of the friction conductors. The distances from the axis of the first rotating shaft are equal.

Further, the transmission part includes a motor, a first transmission wheel and a second transmission wheel, the motor is connected to the second rotation shaft, the first transmission wheel is fixed on the first rotation shaft, and the The second transmission wheel is fixed on the second rotating shaft, and the first transmission wheel and the second transmission wheel mesh with each other to ensure the synchronization of the first transmission wheel and the second transmission wheel.

Further, the bar-shaped friction nanogenerator for monitoring broken teeth also includes a coupling, and the coupling is used to connect the motor and the second rotating shaft.

Further, the outer surface of the detection wheel is provided with a plurality of grooves in an axial array for installing the friction conductor, and the number of the grooves is equal to the number of teeth of the detected gear.

Further, the detection wheel includes a shaft sleeve, a first baffle plate, a second baffle plate and a partition, the shaft sleeve is sleeved on the first rotating shaft, and the first baffle plate and the second baffle plate are respectively It is fixed at both ends of the shaft sleeve, the number of teeth of the partition plate is equal to that of the detected gear, and the end of the partition plate away from the shaft sleeve has a groove for installing the friction conductor.

Further, the shaft cross section of the friction conductor is circular.

Further, the friction conductor includes a conductive layer, a metal layer and a friction layer arranged in sequence from the inside to the outside.

It can be known from the above-mentioned technical solutions that, compared with the prior art, the present invention discloses a strip-shaped friction nanogenerator for monitoring broken teeth, through the setting of the detection wheel on the first rotating shaft, and the The friction conductor is arranged on the surface of the surface, and the detected gear is arranged on the second rotating shaft. During the detection process, the tooth top of the detected gear contacts the friction conductor and generates an electric signal, thereby realizing the detection of the detected gear. The tooth state is detected, and the strip-shaped friction nanogenerator can be self-powered and has strong adaptability.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Accompanying drawing of Fig. 1 is the structural representation of the bar-shaped frictional nanogenerator that is used for broken tooth monitoring provided by the present invention;

Fig. 2 accompanying drawing is the top view of the strip friction nanogenerator used for broken teeth monitoring provided by the present invention;

Accompanying drawing of Fig. 3 is the sectional view of A-A direction in Fig. 2 provided by the present invention;

Figure 4 is a schematic diagram of the state structure when the detection wheel is in contact with the detected gear provided by the present invention;

Figure 5 is a schematic diagram of the state structure when the detection wheel is separated from the detected gear provided by the present invention;

Figure 6 is a schematic structural view of the detection wheel and the friction conductor provided by the present invention;

Figure 7 is a schematic structural view of the friction conductor provided by the present invention;

Fig. 8 is a sectional view of the shaft section of the friction conductor provided by the present invention.

Among them: 1 is the base; 2 is the first rotating shaft; 3 is the detection wheel; 31 is the shaft sleeve; 32 is the first baffle; 33 is the second baffle; 34 is the partition; 4 is the conductive slip ring; 5 is Friction conductor; 51 is a conductive layer; 52 is a metal layer; 53 is a friction layer; 6 is a second rotating shaft; 7 is a first support seat; 8 is a detected gear; 9 is a second support seat; 10 is a motor; 11 is the first transmission wheel; 12 is the second transmission wheel; 13 is the motor support; 14 is the coupling.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to Figures 1-8, the embodiment of the present invention discloses a bar-shaped friction nanogenerator for monitoring broken teeth, including: a base 1, a detection part, a second rotating shaft 6 for fixing the detected gear 8, and a transmission department.

The detection part includes a first rotating shaft 2, a detection wheel 3, a conductive slip ring 4 and a friction conductor 5. Both ends of the first rotating shaft 2 are fixed on the base 1 through the first supporting seat 7. The first rotating shaft 2 and the The first support seat 7 is connected in rotation, the detection wheel 3 and the conductive slip ring 4 are fixedly arranged on the first rotating shaft 2, and the friction conductors 5 are wound around the surface of the detecting wheel 3 in sequence along the axial direction of the first rotating shaft 2, And the two ends of the friction conductor 5 are connected with the conductive slip ring 4 .

Used to fix the second rotating shaft 6 of the detected gear 8, the second rotating shaft 6 is arranged in parallel with the first rotating shaft 2, and the two ends of the second rotating shaft 6 are respectively fixedly connected to the base 1 through the second supporting seat 9, and the second rotating shaft The two rotating shafts 6 are rotationally connected with the second support seat 9, and during the detection process, each tooth top of the detected gear 8 can be in contact with the friction conductor 5 fixed on the surface of the detection wheel 3; wherein, preferably, the detection The number of friction conductors 5 on the surface of the wheel 3 along its axial direction is equal to the number of teeth of the detected gear 8, and the radius of the addendum circle of the detected gear 8 is the same as the axial distance of the friction conductors 5 from the first rotating shaft 2 equal to ensure that the friction conductor 5 is in contact with the tooth top of the detected gear 8 .

The transmission part is used to realize the linkage between the first rotation shaft 2 and the second rotation shaft 6. Specifically, the transmission part includes a motor 10, a first transmission wheel 11 and a second transmission wheel 12, wherein the first transmission wheel 11 and the second transmission wheel 11 The structure of transmission wheel 12 is identical, and motor 10 is fixed on the base 1 by motor support 13, and motor 10 is connected with second rotating shaft 6 by coupling 14, and first transmission wheel 11 is fixed on the first rotating shaft 2, and the second The transmission wheel 12 is fixed on the second rotating shaft 6, and the motor 10 and the second transmission wheel 12 are located at the two ends of the second rotating shaft 6 respectively. The first transmission wheel 11 and the second transmission wheel 12 mesh with each other to ensure the first The transmission wheel 11 and the second transmission wheel 12 are synchronized, so that the tooth top of each detected gear 8 can contact the corresponding friction conductor 5 during the rotation process of the detection wheel 3 and the detection wheel 3 .

In this embodiment, the outer surface of the detection wheel 3 is provided with a plurality of grooves for installing the friction conductor 5 in an axial array, and the number of the grooves is equal to the number of teeth of the detected gear 8, and the length of the grooves is The thickness is greater than or equal to the thickness of the detected gear 8 , so that the tooth top region of the detected gear 8 completely falls within the region of the friction conductor 5 .

In other embodiments, the detection wheel 3 includes a shaft sleeve 31, a first baffle 32, a second baffle 33 and a partition 34, the shaft sleeve 31 is sleeved on the first rotating shaft 2, the first baffle 32 and The second baffle plate 33 is respectively fixed on the two ends of the shaft sleeve 31, the number of teeth of the partition plate 34 is equal to that of the detected gear 8, and the end of the partition plate 34 away from the shaft sleeve 31 has a groove for installing the friction conductor 5, the partition plate 34 is fixedly connected to the shaft sleeve 31 at one end close to the shaft sleeve 31, and the length of the partition plate 34 is greater than or equal to the thickness of the detected gear 8, so that the addendum area of the detected gear 8 falls completely in the area of the friction conductor 5.

In the above-mentioned embodiment, the axial section shape of the friction conductor 5 is circular, and the friction conductor 5 includes a conductive layer 51, a metal layer 52 and a friction layer 53 arranged in sequence from the inside to the outside, wherein the conductive layer 51 is a conductive wire , the friction layer 53 is a perfluoroethylene propylene copolymer. At high temperature, the rigidity of the friction conductor 5 decreases, that is, when the temperature is higher than the melting point of the metal layer 52, the friction conductor 5 can change its shape to adapt to different detection wheels 3 According to the structural requirements, the friction conductor 5 can be adapted to different detection wheels 3, and the electrical signal generated by the friction conductor 5 is transmitted through the conductive slip ring 4.

During the detection process of the detected gear 8 broken teeth, when the detected gear 8 is rotating, the tooth top of each tooth will come into contact with the friction conductor 5 arranged on the detection wheel 3 along the axial direction of the detection wheel 3. According to the contact Based on the principle of electrification and electrostatic induction, each contact will generate a corresponding electrical signal, and the electrical signal will be transmitted by the conductive slip ring 4; when the tooth of the detected gear 8 fails, there will be no contact between the tooth top and the friction conductor 5 , therefore, at this time, a lack of electrical signal will occur, thereby realizing the detection of the broken teeth of the detected gear 8 . The friction conductor 5 can become soft at high temperature, that is, when the temperature is higher than the melting point of the metal layer 52 , the removal of the friction conductor 5 can be facilitated, and the friction conductor 5 can be reused and replaced.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A bar friction nanogenerator for broken tooth monitoring, comprising:

a base;

the detection part comprises a first rotating shaft, a detection wheel, a conductive slip ring and a friction conductor, wherein two ends of the first rotating shaft are fixed on the base through first supporting seats, the first rotating shaft is rotatably connected with the first supporting seats, the detection wheel and the conductive slip ring are fixedly arranged on the first rotating shaft, the friction conductor is sequentially wound on the surface of the detection wheel along the axial direction of the first rotating shaft, and two ends of the friction conductor are connected with the conductive slip ring;

the second rotating shaft is used for fixing the detected gear, two ends of the second rotating shaft are respectively and fixedly connected with the base through second supporting seats, the second rotating shaft is rotatably connected with the second supporting seats, the second rotating shaft is arranged in parallel with the first rotating shaft, and each tooth crest of the detected gear can be in contact with the friction conductor fixed on the surface of the detection wheel in the detection process;

and the transmission part is used for realizing linkage of the first rotating shaft and the second rotating shaft.

2. The strip-type friction nanogenerator for broken tooth monitoring according to claim 1, wherein the number of the friction conductors on the surface of the detection wheel along the axial direction thereof is equal to the number of the teeth of the detected gear, and the radius of the addendum circle of the detected gear is equal to the axial distance between the friction conductor and the first rotating shaft.

3. The strip-type friction nanogenerator for broken tooth monitoring of claim 2, wherein the transmission part comprises a motor, a first transmission wheel and a second transmission wheel, the motor is connected with the second rotating shaft, the first transmission wheel is fixed on the first rotating shaft, the second transmission wheel is fixed on the second rotating shaft, and the first transmission wheel and the second transmission wheel are meshed with each other to ensure that the first transmission wheel and the second transmission wheel are synchronous.

4. The strip-shaped friction nanogenerator for broken tooth monitoring according to claim 3, further comprising a coupler, wherein the coupler is used for connecting the motor and the second rotating shaft.

5. The strip-type friction nanogenerator for broken tooth monitoring according to claim 1, wherein a plurality of grooves for installing the friction conductor are arranged on the outer surface of the detection wheel in an axial array manner, and the number of the grooves is equal to that of the teeth of the detected gear.

6. The strip-type friction nanogenerator for monitoring broken teeth according to claim 1, wherein the detection wheel comprises a shaft sleeve, a first baffle, a second baffle and a partition plate, the shaft sleeve is sleeved on the first rotating shaft, the first baffle and the second baffle are respectively fixed at two ends of the shaft sleeve, the number of teeth of the partition plate is equal to that of the detected gear, and one end, far away from the shaft sleeve, of the partition plate is provided with a groove for mounting the friction conductor.

7. The strip-shaped friction nanogenerator for broken tooth monitoring according to any one of claims 1 to 6, wherein the axial cross-sectional shape of the friction conductor is circular.

8. The strip-shaped friction nanogenerator for broken tooth monitoring according to claim 7, wherein the friction conductor comprises a conductive layer, a metal layer and a friction layer which are sequentially arranged from inside to outside.

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