Friction nanometer power generation device and power generation method based on mechanical frequency raising structure

Abstract

The invention discloses a friction nanometer power generation device and method based on a mechanical frequency increasing structure, and the device comprises a housing, a first friction wheel, a second friction wheel, and a driving mechanism. The first friction wheel is fixed to the shell, and the second friction wheel is rotationally connected to the shell through a rotating shaft. The driving mechanism comprises a linear rack and a gear transmission mechanism; the gear transmission mechanism comprises a first-stage gear, a second-stage gear and a third-stage gear; the first-stage gear is rotationally connected into the shell through a first rotating shaft; the secondary gear is mounted on the second rotating shaft; and the third-stage gear is mounted on the rotating shaft. According to the friction nanometer power generation device, low-frequency vibration energy can be converted into high-frequency input through the frequency raising structure, so that the output performance of the friction nanometer power generation device is improved, meanwhile, the problem that the output power of a common friction nanometer power generator is insufficient can be effectively solved, and therefore continuous output of voltage and current is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of friction nano power generation, and in particular relates to a friction nano power generation device and a power generation method based on a mechanical frequency-upgrading structure. Background Art

[0002] Since the Industrial Revolution, the rapid economic development has increased the demand for energy. All sectors of society are actively exploring and promoting energy innovation and transformation, such as the development and utilization of renewable energy such as wind energy, solar energy and hydropower. At the same time, promoting energy conversion and utilization efficiency through scientific and technological innovation is also an indispensable direction. Collecting vibration energy in the environment is also a hot topic of research. However, the vibration in the environment generally has low-frequency and random characteristics; when the resonant frequency of most vibration energy harvesters is high, this will result in the vibration energy collected by the vibration energy harvester being extremely limited, and it is impossible to provide sufficient power for the wireless sensor nodes.

[0003] As a new energy collection and self-powered technology, the friction nanogenerator (TENG) provides a new idea for solving the problem of low-frequency energy collection; the friction nanogenerator (TENG) is a nano energy technology based on the coupling effect of mechanical interface friction electrification and electrostatic induction. Through this technology, low-frequency, randomly distributed mechanical energy in the environment can be effectively converted into electrical energy.

[0004] However, the output power of current ordinary friction nanogenerators is insufficient, making it difficult to achieve continuous output of voltage and current. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a friction nano-generator based on a mechanical up-conversion structure. The friction nano-generator can convert low-frequency vibration energy into high-frequency input through the up-conversion structure to improve the output performance of the friction nano-generator. At the same time, it also effectively solves the problem of insufficient output power of ordinary friction nano-generators and realizes continuous output of voltage and current.

[0006] The technical solution of the present invention to solve the above technical problems is:

[0007] A friction nano power generation device based on a mechanical up-conversion structure comprises a housing, a first friction wheel arranged in the housing, a second friction wheel and a driving mechanism for driving the second friction wheel to rotate, wherein:

[0008] The first friction wheel is fixed on the housing; the second friction wheel is rotatably connected to the housing via a rotating shaft;

[0009] The driving mechanism includes a linear rack and a gear transmission mechanism for transmitting the power of the linear rack to the second friction wheel; the gear transmission mechanism includes a primary gear, a secondary gear and a tertiary gear; wherein the primary gear is rotatably connected in the housing through a first rotating shaft, and the secondary gear is mounted on the second rotating shaft; the upper and lower ends of the second rotating shaft are both mounted in the housing through a sliding connection structure; the sliding connection structure includes an arc groove arranged on the housing, the center of the arc groove is located on the axis of the first rotating shaft, and the bottom of the arc groove extends obliquely; the tertiary gear is mounted on the rotating shaft.

[0010] Preferably, the housing is provided with a slide groove at a corresponding position of the linear rack; the linear rack is installed in the slide groove and meshes with the primary gear.

[0011] Preferably, it also includes an electromagnetic power generation mechanism, which includes a U-shaped magnet arranged at the bottom of the shell and an electromagnetic coil arranged at the bottom of the rotating shaft, wherein a mounting portion for mounting the U-shaped magnet is provided at the bottom of the shell; the U-shaped magnet is installed in the mounting portion; and the electromagnetic coil is located inside the U-shaped magnet.

[0012] Preferably, the electromagnetic coil is mounted on a rotating seat, and the rotating seat is mounted on the bottom of the rotating shaft through a threaded connection structure.

[0013] Preferably, it also includes a contact-separation type friction nano-power generation mechanism, which includes a slide rail and a slider arranged in the slide rail, wherein the slider is installed in the slide rail, and the slider is connected to the second friction wheel through a connecting rod; one end of the connecting rod is hinged to the second friction wheel, and the other end is hinged to the slider.

[0014] Preferably, a third friction layer whose friction material is polytetrafluoroethylene is pasted on the front of the sliding block, and a fourth friction layer whose friction material is aluminum foil is pasted on the frame in contact with and separated from the third friction layer.

[0015] Preferably, a first friction layer is adhered to the top of the first friction wheel; a second friction layer is adhered to the bottom of the second friction wheel; wherein the material of the first friction layer is copper foil; and the material of the second friction layer is fluorinated ethylene propylene copolymer.

[0016] Preferably, the bottom of the arc-shaped groove extends obliquely upward toward the direction close to the third-stage gear.

[0017] Preferably, the slide rail is provided with a slide groove at the bottom of the slide block, the slide groove extending linearly along the length direction of the slide rail, and a ball bearing is provided in the slide groove.

[0018] A power generation method of a friction nano power generation device based on a mechanical frequency-upgrading structure comprises the following steps:

[0019] When the linear rack is subjected to external linear excitation, the linear rack drives the primary gear to rotate, thereby driving the secondary gear to rotate around the first rotating shaft until the secondary gear is meshed with the third gear;

[0020] As the linear rack drives the primary gear to continue to rotate, the primary gear drives the secondary gear to continue to rotate, and the secondary gear rotates while driving the tertiary gear to rotate; the tertiary gear rotates while driving the second friction wheel, so that a non-contact friction electric structure is formed between the first friction wheel and the second friction wheel;

[0021] When the linear rack stops moving or moves in the reverse direction, the second friction wheel still rotates under the action of inertia to achieve the effect of multiple frictions and meet the frequency increase requirement; in this process, the secondary gear slides from a high position to a low position along the arc groove under the action of the reverse tangential force of the tertiary gear and the gravity of the secondary gear itself, so that the secondary gear is separated from the tertiary gear, so that the primary gear and the secondary gear will not affect the work of the first friction layer and the second friction layer in the subsequent process of the linear rack returning to the initial position; after the secondary gear returns to the initial position, power generation is completed.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] The friction nano power generation device based on the mechanical frequency-upgrading structure of the present invention utilizes a gear transmission mechanism to convert the linear motion of the linear rack into the rotational motion of the primary gear, thereby driving the secondary gear to rotate around the first rotating shaft, until the secondary gear and the tertiary gear are meshed, the secondary gear rotates and drives the tertiary gear to rotate, and the rotation of the tertiary gear will drive the second friction wheel to rotate, so that a non-contact friction electric structure is formed between the first friction wheel and the second friction wheel; and when the linear rack stops moving or moves in the opposite direction, under the action of inertia, the second friction wheel still rotates to achieve the effect of multiple frictions and meet the frequency-upgrading requirements; because the secondary gear is under the action of the reverse tangential force of the tertiary gear and the gravity of the secondary gear itself, the secondary gear will slide from a high place to a low place along the arc groove, thereby realizing separation from the tertiary gear, so that the primary gear and the secondary gear will not affect the work of the first friction layer and the second friction layer in the subsequent process of the linear rack returning to the original position, so that the low-frequency vibration energy can be converted into high-frequency input through the frequency-upgrading structure to improve the output performance of the friction nano generator, and at the same time, it also effectively solves the problem of insufficient output power of ordinary friction nano generators, and realizes the continuous output of voltage and current. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 and Figure 2 Schematic diagrams of the structure of the friction nano power generation device based on the mechanical upscaling structure of the present invention from two different perspectives.

[0025] Figure 3 This is an exploded view of the friction nano power generation device based on the mechanical upscaling structure of the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the lower shell.

[0027] Figure 5 It is a schematic diagram of the structure of the upper shell.

[0028] Figure 6 It is a structural schematic diagram of the rotating seat.

[0029] Figure 7 A schematic diagram of the structure of the slider.

[0030] Figure 8 It is a structural schematic diagram of the slide rail.

[0031] Fig. 9 It is a schematic diagram of the structure of the second friction wheel. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0033] See also Figure 1-Figure 9 The friction nano power generation device based on the mechanical upscaling structure of the present invention comprises a housing 1, a first friction wheel 3 arranged in the housing 1, a second friction wheel 4 and a driving mechanism for driving the second friction wheel 4 to rotate, wherein:

[0034] The first friction wheel 3 is fixed on the housing 1; the second friction wheel 4 is rotatably connected to the housing 1 via a rotating shaft; a first friction layer is adhered to the top of the first friction wheel 3, and a second friction layer is adhered to the bottom of the second friction wheel 4; wherein the material of the first friction layer is copper foil (Cu); the material of the second friction layer is fluorinated ethylene propylene copolymer; by rubbing the FEP surface with the Cu surface, the surface properties thereof are changed, so as to improve the friction effect of the friction layer in the first friction wheel 3 and the second friction wheel 4, thereby increasing the surface charge density;

[0035] The driving mechanism includes a linear rack 2 and a gear transmission mechanism for transmitting the power of the linear rack 2 to the second friction wheel 4; the gear transmission mechanism includes a primary gear 11, a secondary gear 12 and a tertiary gear 13; the primary gear 11 is rotatably connected in the housing 1 through a first rotating shaft, and the secondary gear 12 is installed on the second rotating shaft; the upper and lower ends of the second rotating shaft are installed in the housing 1 through a sliding connection structure; the sliding connection structure includes an arc groove 103 arranged on the housing 1, the center of the arc groove 103 is located on the axis of the first rotating shaft, and the bottom of the arc groove 103 extends upward at an angle toward the direction close to the third gear 13; the third gear 13 is installed on the rotating shaft.

[0036] In this embodiment, the diameter of the first friction wheel 3 is Φ100 mm, the diameter of the middle through hole thereof is Φ6 mm, and the first friction wheel 3 and the end cover of the housing 1 are an integral structure; the diameter of the second friction wheel 4 is Φ100 mm;

[0037] The linear rack 2 has a module of 2.5, a pressure angle of 20°, a tooth top height of 2.5 mm, a tooth root height of 3 mm, a tooth thickness of 3.927 mm, and a length of 265 mm;

[0038] The parameters of the upper part of the first-stage gear 11 are as follows: the module is 2.5, the number of teeth is 28, the pressure angle is 20°, the pitch circle diameter is 64.4mm, the top circle diameter is 69mm, the root circle diameter is 58.65mm, the tooth width is 15mm, and the pitch circle tooth thickness is 3.613mm; the parameters of the lower part of the first-stage gear 11 are as follows: the module is 2.5, the number of teeth is 15, the pressure angle is 20°, the pitch circle diameter is 37.5mm, the top circle diameter is 42.5mm, the root circle diameter is 31.25mm, the tooth width is 20mm, and the pitch circle tooth thickness is 3.927mm; the shaft hole diameter of the first-stage gear 11 is 9mm.

[0039] The parameters of the secondary gear 12 are: module 2.5, number of teeth 12, pressure angle 20°, pitch circle diameter 25.2mm, top circle diameter 29.4mm, root circle diameter 19.95mm, tooth width 10mm, pitch circle tooth thickness 3.298mm, shaft hole diameter 9mm;

[0040] The parameters of the three-stage gear 13 are: module 2.5, number of teeth 12, pressure angle 20°, pitch circle diameter 22mm, top circle diameter 26.4mm, root circle diameter 16.5mm, tooth width 10mm, pitch circle tooth thickness 3.455mm, and shaft hole diameter 9mm.

[0041] See also Figure 1-Figure 9The housing 1 is provided with a slide groove 105 at the corresponding position of the linear rack 2; the linear rack 2 is installed in the slide groove 105 and meshes with the primary gear 11; by setting the slide groove 105, the linear rack 2 can be guided and limited, thereby ensuring that the linear rack 2 is always meshed with the primary gear 11.

[0042] In this embodiment, the shell is composed of an upper shell 102 and a lower shell 101, and is assembled through a corresponding mounting structure; wherein mounting holes 104 are provided on the upper shell 102 and the lower shell 101 at positions corresponding to the first rotating shaft.

[0043] See also Figure 1-Figure 9 The connection structure between the second friction wheel 4 and the gear shaft (i.e., the rotating shaft) of the third-stage gear 13 is a cylinder 15, the upper half of which is hollow and fixed to the second friction wheel 4. The cylinder 15 is provided with a through hole 16 that penetrates the hollow part below the second friction wheel 4 to facilitate the connection of the wire; the lower half of the cylinder 15 is provided with a mortise and tenon structure 17 connected to the gear shaft (i.e., the rotating shaft) of the third-stage gear 13.

[0044] See also Figure 1-Figure 9 The electromagnetic power generation mechanism of the friction nano power generation device based on the mechanical up-conversion structure of the present invention comprises a U-shaped magnet 10 arranged at the bottom of the shell 1 and an electromagnetic coil 9 arranged at the bottom of the rotating shaft, wherein the electromagnetic coil 9 is mounted on a rotating seat 14; the U-shaped magnet 10 is mounted on a mounting portion 106 at the bottom of the lower shell 101; the rotating seat 14 is mounted at the bottom of the rotating shaft through a threaded connection structure; the electromagnetic coil 9 is located inside the U-shaped magnet 10.

[0045] Through the above arrangement, when the second friction wheel 4 rotates together with the three-stage gear 13, the electromagnetic coil 9 connected to the bottom of the three-stage gear 13 also rotates, generating electromagnetic induction with the U-shaped magnet 10 installed on the housing 1, thereby achieving the effect of electromagnetic power generation.

[0046] See also Figure 1-Figure 9 The friction nano power generation device based on the mechanical frequency-increasing structure of the present invention further includes a contact-separation friction nano power generation mechanism, which includes a slide rail 8 and a slider 6 arranged in the slide rail 8, wherein the slider 6 is installed in the slide rail 8, and the slider 6 is connected to the second friction wheel 4 through a connecting rod 5; one end of the connecting rod 5 is hinged on the first friction wheel 3, and the other end is hinged on the slider 6;

[0047] In this embodiment, a friction layer 7 is provided at the front of the slider 6, and the friction material pasted on the friction layer 7 is polytetrafluoroethylene (PTFE), and the friction material pasted on the part of the frame that contacts and separates from the friction layer 7 is aluminum foil (Al); the surface properties of the PTFE and Al are changed by rubbing against each other, so as to improve the friction effect of the friction layer and increase the surface charge density;

[0048] Through the above arrangement, when the second friction wheel 4 rotates, the connecting rod 5 on its upper layer and the slider 6 form a crank slider mechanism, thereby driving the slider 6 located in the slide rail 8 to continuously reciprocate, thereby constantly contacting and separating with the opposite frame, thereby forming a contact-separation friction nano power generation mechanism.

[0049] See also Figure 1-Figure 9 The slide rail 8 is provided with a slide groove 801 extending linearly along the length direction of the slide rail 8 at the bottom of the slider 6, and a ball is provided in the slide groove 801 to reduce the friction resistance during movement.

[0050] See also Figure 1-Figure 9 The power generation method of the friction nano power generation device based on the mechanical up-conversion structure of the present invention comprises the following steps:

[0051] When the linear rack 2 is subjected to external linear excitation, the linear rack 2 drives the primary gear 11 to rotate, thereby driving the secondary gear 12 to rotate around the first rotating shaft until the secondary gear 12 is meshed with the tertiary gear 13;

[0052] As the linear rack 2 drives the primary gear 11 to continue to rotate, the primary gear 11 drives the secondary gear 12 to continue to rotate, and the secondary gear 12 rotates while driving the tertiary gear 13 to rotate, and the tertiary gear 13 rotates while driving the second friction wheel 4, so that a non-contact friction electric structure is formed between the first friction wheel 3 and the second friction wheel 4;

[0053] After the linear rack 2 stops moving or moves in the reverse direction, the second friction wheel 4 still rotates under the action of inertia to achieve the effect of multiple frictions and meet the frequency increase requirement; in this process, the secondary gear 12 slides from a high position to a low position along the arc groove 103 under the action of the reverse tangential force of the tertiary gear 13 and the gravity of the secondary gear 12 itself, so that the secondary gear 12 and the tertiary gear 13 are separated, so that the primary gear 11 and the secondary gear 12 do not affect the work of the first friction layer and the second friction layer in the subsequent process of the linear rack 2 returning to the original position, and the secondary gear 12 completes one power generation after returning to the original position;

[0054] In addition, when the second friction wheel 4 rotates together with the three-stage gear 13, the electromagnetic coil 9 connected to the bottom of the three-stage gear 13 also rotates accordingly, generating electromagnetic induction with the U-shaped magnet 10 installed on the housing 1, thereby achieving the effect of electromagnetic power generation;

[0055] In addition, when the second friction wheel 4 rotates, the connecting rod 5 on its upper layer and the slider 6 form a crank slider mechanism, thereby driving the slider 6 located in the slide rail 8 to continuously reciprocate, thereby constantly contacting and separating with the opposite frame, thereby forming a contact-separation friction nano power generation mechanism.

[0056] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A friction nano power generation device based on a mechanical upscaling structure, characterized in that: The invention comprises a housing, a first friction wheel and a second friction wheel arranged in the housing, and a driving mechanism for driving the second friction wheel to rotate, wherein: The first friction wheel is fixed on the housing; the second friction wheel is rotatably connected to the housing via a rotating shaft; The driving mechanism includes a linear rack and a gear transmission mechanism for transmitting the power of the linear rack to the second friction wheel; the gear transmission mechanism includes a primary gear, a secondary gear and a tertiary gear; wherein the primary gear is rotatably connected in the housing through a first rotating shaft, and the secondary gear is mounted on the second rotating shaft; the upper and lower ends of the second rotating shaft are both mounted in the housing through a sliding connection structure; the sliding connection structure includes an arc groove arranged on the housing, the center of the arc groove is located on the axis of the first rotating shaft, and the bottom of the arc groove extends obliquely; the tertiary gear is mounted on the rotating shaft.

2. The friction nano power generation device based on the mechanical upscaling structure according to claim 1 is characterized in that: The housing is provided with a slide groove at a position corresponding to the linear rack; the linear rack is installed in the slide groove and meshes with the primary gear.

3. According to claim 1, the friction nano power generation device based on the mechanical upscaling structure is characterized in that: It also includes an electromagnetic power generation mechanism, which includes a U-shaped magnet arranged at the bottom of the shell and an electromagnetic coil arranged at the bottom of the rotating shaft, wherein a mounting portion for mounting the U-shaped magnet is provided at the bottom of the shell; the U-shaped magnet is installed in the mounting portion; and the electromagnetic coil is located inside the U-shaped magnet.

4. The friction nano power generation device based on the mechanical upscaling structure according to claim 3 is characterized in that: The electromagnetic coil is mounted on a rotating seat, and the rotating seat is mounted on the bottom of the rotating shaft through a threaded connection structure.

5. According to claim 3, the friction nano power generation device based on the mechanical upscaling structure is characterized in that: It also includes a contact-separation type friction nano-power generation mechanism, which includes a slide rail and a slider arranged in the slide rail, wherein the slider is installed in the slide rail, and the slider is connected to the second friction wheel through a connecting rod; one end of the connecting rod is hinged on the second friction wheel, and the other end is hinged on the slider.

6. The friction nano power generation device based on the mechanical upscaling structure according to claim 5 is characterized in that: A third friction layer made of polytetrafluoroethylene is pasted on the front of the sliding block, and a fourth friction layer made of aluminum foil is pasted on the frame that is in contact with and separated from the third friction layer.

7. The friction nano power generation device based on the mechanical upscaling structure according to claim 1 is characterized in that: A first friction layer is adhered to the top of the first friction wheel; a second friction layer is adhered to the bottom of the second friction wheel; wherein the material of the first friction layer is copper foil; and the material of the second friction layer is fluorinated ethylene propylene copolymer.

8. The friction nano power generation device based on the mechanical upscaling structure according to claim 1 is characterized in that: The bottom of the arc-shaped groove extends obliquely upward toward the direction close to the third-stage gear.

9. The friction nano power generation device based on the mechanical upscaling structure according to claim 5 is characterized in that: The slide rail is provided with a slide groove which extends linearly along the length direction of the slide rail at the bottom of the slide block, and a ball is provided in the slide groove.

10. A power generation method for the friction nano power generation device based on the mechanical upscaling structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: When the linear rack is subjected to external linear excitation, the linear rack drives the primary gear to rotate, thereby driving the secondary gear to rotate around the first rotating shaft until the secondary gear is meshed with the third gear; As the linear rack drives the primary gear to continue to rotate, the primary gear drives the secondary gear to continue to rotate, and the secondary gear rotates while driving the tertiary gear to rotate; the tertiary gear rotates while driving the second friction wheel, so that a non-contact friction electric structure is formed between the first friction wheel and the second friction wheel; When the linear rack stops moving or moves in the reverse direction, the second friction wheel still rotates under the action of inertia to achieve the effect of multiple frictions and meet the frequency increase requirement; in this process, the secondary gear will slide from a high place to a low place along the arc groove under the action of the reverse tangential force of the tertiary gear and the gravity of the secondary gear itself, so that the secondary gear is separated from the tertiary gear, so that the primary gear and the secondary gear will not affect the work of the first friction layer and the second friction layer in the subsequent process of the linear rack returning to the initial position; after the secondary gear returns to the initial position, power generation is completed.

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