CN110661443A

CN110661443A - Contact separation type friction power generation device

Info

Publication number: CN110661443A
Application number: CN201910858703.0A
Authority: CN
Inventors: 王晓力; 吴恒; 李弘恺
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology; Beijing Institute of Technology BIT
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-01-07
Anticipated expiration: 2039-09-11
Also published as: CN110661443B

Abstract

The invention discloses a contact separation type friction power generation device, which comprises: the power generation device comprises a box body, a power input shaft, a transmission shaft, a gear train, a cam follower device and a contact and separation electrification part, wherein the power input shaft is arranged on the box body so as to generate power by utilizing energy in the environment through a power input accessory; the transmission shaft is arranged on the box body; the gear train drives the transmission shaft to rotate by the power input shaft and is used for transmitting motion and power; the cam in the cam follower device is arranged on the transmission shaft, the follower is arranged on the side surface of the cam and fixedly arranged on the sliding block through threads, and the cam drives the follower to complete linear reciprocating motion; the contact separation electrification part is driven by the slide block to convert mechanical energy into electric energy. The device has the advantages of compact layout, high conversion efficiency and long service life, and effectively solves the problems of unreasonable spatial layout, low conversion efficiency and short service life of the conventional energy conversion device.

Description

Contact separation type friction power generation device

Technical Field

The invention relates to the technical field of energy technology and friction power generation, in particular to a contact separation type friction power generation device.

Background

The conventional friction power generation system includes: the power generation device comprises a power generation device, a power input device and a transmission shaft, wherein the power input device is used for capturing external power (such as wind power and water power) to push the transmission shaft to rotate, and the transmission shaft drives the sliding type friction generator. The existing system adopts a layout mode that a generator is arranged on the upper part, a transmission shaft is arranged in the middle, an energy capturing device is arranged on the lower part, and the device is arranged in an open space and uses a sliding friction generator.

However, the prior art has the following disadvantages: the space layout of the friction power generation system is unreasonable, and the layout of the prior art adopts the structure that the upper part is provided with a power generator and the lower part is provided with an energy capture device, so that the gravity center is high, the manufacture and the installation are difficult, and the stability of the device is poor; in the prior art, the device has low working frequency and low power generation efficiency; the friction generator works in an open environment, the material is seriously aged, and the service life is short; the friction generator is seriously abraded, and the material loss is large.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the invention aims to provide a contact separation type friction power generation device which has the advantages of compact layout, high conversion efficiency and long service life and effectively solves the problems of unreasonable spatial layout, low conversion efficiency and short service life of the conventional energy conversion device.

In order to achieve the above object, an embodiment of the present invention provides a contact separation type friction power generating device, including: a case, a closed case; the power input shaft is arranged on the box body and generates power by utilizing energy in the environment through a power input accessory; the transmission shaft is arranged on the box body; the gear train enables the power input by the power input shaft to drive the transmission shaft to rotate and is used for transmitting motion and power; the cam in the cam follower device is arranged on the transmission shaft, the follower is arranged on the side surface of the cam and fixedly arranged on the sliding block through threads, and the cam drives the follower to complete linear reciprocating motion for changing motion forms; and the contact separation electrification part is driven by the sliding block to complete the conversion from mechanical energy to electric energy.

The contact separation type friction power generation device provided by the embodiment of the invention has the advantages of simple and compact structure, easiness in manufacturing and mounting, a closed box body design, capability of providing a good working environment and prolonging the service life of equipment, the use of a gear train for improving the rotating speed and increasing the power generation frequency, and a cam follower device for changing the motion form and reducing the loss of generator materials so as to prolong the service life.

In addition, the contact-separation type friction power generation device according to the above embodiment of the present invention may further have the following additional technical features:

further, in one embodiment of the present invention, the input end of the power input shaft protrudes from the case by a predetermined length.

Further, in one embodiment of the present invention, the gear train includes: the first straight bevel gear is fixed on the power input shaft through a first jackscrew, the second straight bevel gear is fixed on the transmission shaft through a second jackscrew, and the first straight bevel gear is meshed with the second straight bevel gear.

Further, in one embodiment of the present invention, the cam follower means comprises: the cylindrical cam is arranged on the transmission shaft, the driven piece is arranged on the side face of the cylindrical cam, and the cylindrical cam drives the driven piece to do linear reciprocating motion.

Further, in one embodiment of the present invention, the contact separation electrification part includes: the first contact pair and the second contact pair are arranged on the sliding block and the box body.

Further, in one embodiment of the present invention, the first contact pair is made of a metal material; the second contact pair is a polymer film.

Further, in one embodiment of the present invention, the first contact pair is adhered to the box body through an adhesive tape, and the second contact pair polymer film is adhered to two sides of the sliding block through a sponge double-sided adhesive with a preset thickness.

Further, in one embodiment of the present invention, comprises: an external unit connected to the contact separation electrification part to perform collection and storage of energy

Further, in one embodiment of the invention, the contact separation electrification part is connected with the external unit through a wire to complete the collection and storage of energy.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a contact separation type friction power generating device according to an embodiment of the present invention;

FIG. 2 is a diagram of the overall structural design according to an embodiment of the present invention;

FIG. 3 is a diagram of a cam-follower structure according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a contact separation electrification part according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a gear train configuration according to an embodiment of the invention.

Description of reference numerals:

1: a friction power generation device; 2: a box body; 30: a power input shaft; 31: a gear train; 310: a first straight-tooth bevel gear; 311: a second straight bevel gear; 32: a drive shaft; 33: a cam follower means; 330: a cam; 331: a driven member; 332: a slider; 333: a guide rail; 4: contacting and separating the electrification member; 40: a first contact pair; 41: and a second contact pair.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A contact-separation type friction power generating apparatus proposed according to an embodiment of the present invention is described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a contact separation type friction power generating device according to an embodiment of the present invention.

As shown in fig. 1, the contact-separation type friction power generating device 1 includes: the box 2, the power input shaft 30, the gear train 31, the transmission shaft 32, the cam follower device 33 and the contact and separation electrification part 4.

Wherein, the box body 2 is a closed box body; the power input shaft 30 is arranged on the box body 2, and generates power by utilizing energy in the environment through a power input accessory; the transmission shaft 32 is arranged on the box body 2; the gear train 31 is used for driving the transmission shaft 32 to rotate by power input by the power input shaft 30; the cam 330 is arranged on the transmission shaft 32, the driven piece 331 is arranged on the side surface of the cam 330 and is fixedly arranged on the sliding block 332 through threads, the sliding block 332 is arranged on the guide rail 333, and the cam 330 drives the driven piece 331 to complete linear reciprocating motion for transformation of motion forms; the contact separation electrification part 4 is driven by the slide block 332, and the conversion from mechanical energy to electric energy is realized. The device 1 of the embodiment of the invention has the advantages of compact layout, high conversion efficiency and long service life, and effectively solves the problems of unreasonable spatial layout, low conversion efficiency and short service life of the conventional energy conversion device.

The contact separation type friction power generation device has the advantages that the space layout is compact, the working frequency is high, and the service life is long; the power generation frequency and efficiency are improved by using a gear train structure; the cam follower device is adopted to change the motion mode, so that the material loss is reduced, and the service life of the generator is prolonged.

In one embodiment of the present invention, the input end of the power input shaft 30 extends from the casing 2 by a preset length, wherein a person skilled in the art can set a specific extending length according to actual conditions, and is not limited in this respect.

Further, in one embodiment of the present invention, the gear train 31 includes: a first straight bevel gear and a second straight bevel gear. Wherein, the first straight bevel gear is fixed on the power input shaft 30 through a first jackscrew, the second straight bevel gear is fixed on the transmission shaft 32 through a second jackscrew, and the first straight bevel gear is meshed with the second straight bevel gear.

Specifically, the internal structure of the embodiment of the invention is shown in fig. 1, the overall structure is designed as shown in fig. 2, and in combination with fig. 3, the friction power generating device 1 comprises a box 2, a power input shaft 30, a transmission shaft 32, a gear train 31, a cam follower device 33, and a contact and separation electrification part 4. The power input shaft 30 is arranged on the box body 2, and one end of the power input shaft extends out of the box body 2; the first straight bevel gear 310 is fixed on the power input shaft 30 through a jackscrew, the second straight bevel gear 311 is fixed on the transmission shaft 32 through a jackscrew, and the first straight bevel gear 310 is meshed with the second straight bevel gear 311; the transmission shaft 32 is installed on the box body 2, the cylindrical cam 330 is installed on the transmission shaft 32, the driven piece 331 is installed on the side surface of the cylindrical cam 330, the driven piece 331 is fixedly installed on the slide block 332 by using threads, the slide block 332 is installed on the guide rail 333, and the contact separation electrification part 4 is adhered on the slide block 332 and the box body 2, wherein, the first contact pair 40 of the contact separation electrification part 4 is adhered on the box body 2, and the second contact pair 41 of the contact separation electrification part 4 is adhered on two sides of the slide block 332.

Further, in an embodiment of the present invention, the apparatus 1 of the embodiment of the present invention further includes: an external unit. Wherein an external unit is connected to the contact separation electrification part 4, completing the collection and storage of energy.

Specifically, the working principle of the apparatus 1 of the embodiment of the present invention is as follows: the power input shaft 30 is connected with power input accessories (blades and the like), the power input accessories utilize energy (wind energy, water energy and the like) in the surrounding environment, the power input shaft 30 transmits power to the bevel gear 310, the bevel gear 310 is meshed with the bevel gear 311 to transmit power, the bevel gear 311 drives the transmission shaft 32 to rotate, the transmission shaft 32 drives the cylindrical cam 330 to rotate, the cylindrical cam 330 drives the driven piece 331 to move, the driven piece 331 drives the sliding block 332 to complete linear reciprocating motion on the linear guide rail 333, the sliding block 40 drives the contact separation electrification part 4, and the contact separation electrification part 4 is connected with an external unit for energy collection or storage through a lead wire to complete energy collection and storage.

Further, in one embodiment of the present invention, the first contact pair may be made of a metal material; the second contact pair can be a polymer film, wherein the first contact pair is pasted on the box body through an adhesive tape, and the second contact pair polymer film is pasted on two sides of the sliding block through sponge double-sided adhesive with preset thickness

Specifically, as shown in fig. 4, the embodiment of the present invention is applicable to various contact separation electrification materials. The first contact pair 40 is usually made of copper, aluminum or other metal material; the second contact pair 41 is typically a polymer film, such as Polydimethylsiloxane (PDMS), polyvinyl chloride (PVC), Polyimide (PI), or the like. The first contact pair 40 is directly adhered to the box body by using an adhesive tape, and the polymer film of the second contact pair 41 is adhered to two sides of the sliding block by using a sponge double-sided adhesive with a certain thickness. Wherein the length and width of the polymer film are 30mm and 20mm, and the thickness is variable; the metal foil has a length and width of 30mm and 20 mm. The first contact pair 40 and the second contact pair 41 are aligned. The first contact pair 40 is provided with a wire for connection to an external unit for energy collection or storage.

Further, in order to provide a closed working environment and avoid the influence of excessive environmental factors, the box body designed by the embodiment of the invention is formed by connecting 7 polymethyl methacrylate (PMMA) plates through bolts, and the overall size is 150mm x 120mm x 100 mm. As shown in fig. 1 and 2, 6 of the plates constitute the outer wall of the box, the other plate is in the box, and the bottom plate has a thickness of 12mm, and the rest has a thickness of 10 mm. Processing the dead eye on the board of installation transmission shaft, nominal size is 26mm, and the dead eye adopts H8/g8 cooperation with the bearing, processes four M3 screw holes around the dead eye for the installation bearing end cover, wherein the dead eye of bottom board processing is the blind hole, and the degree of depth is 8mm, need not to install the bearing end cover. As shown in fig. 1, M4 screw holes are processed on the side surfaces of the organic glass plates at the left and right sides, and M4 screw holes are processed on the upper and lower side surfaces of the organic glass plates in the box body. And machining smooth holes on the upper, lower, front and rear PMMA plates, and connecting the PMMA plates with threads on the side surfaces through M4 bolts.

In order to improve the operating frequency and the power generation efficiency, the embodiment of the present invention uses a gear train structure. As shown in FIG. 5, the gear train adopts 1 model, 45 teeth and 15 teeth of bevel gears, so that the working frequency is improved, and the power generation efficiency is improved. The gear is a nylon gear, and has light weight, excellent mechanical strength, wear resistance, better corrosion resistance and self-lubricating property. The gear adopts small module, reduces the size of the gear and saves the use space. The gears are fixed on respective transmission shafts through jackscrews, wherein the inner hole of the large gear is 12mm, and the inner hole of the small gear is 6 mm.

In order to reduce material loss and prolong the service life of the generator, the embodiment of the invention uses a cam follower structure. As shown in fig. 3, the cam is a cylindrical cam, the contour line of the cam adopts a sine acceleration motion law curve, and the motion curve ensures that the motion has no rigid impact and no flexible impact, so that the cam is suitable for occasions with medium-high speed and light load; the follower uses a miniature cam follower bearing BPB01-d3 and is screw-mounted on the slider. The radius of the cam is 20mm, the height is 30mm, the radius of the base circle is 18mm, and the movement stroke is 16 mm; the roller radius of the miniature cam follower bearing is 3 mm.

In summary, the contact separation type friction power generation device provided by the embodiment of the invention has the advantages of simple and compact structure, easiness in manufacturing and mounting, capability of providing a good working environment and prolonging the service life of equipment due to the design of a closed box body, capability of increasing the power generation frequency due to the use of a gear train, capability of changing the motion form of a cam follower device and prolonging the service life due to the reduction of the loss of a generator material, compact layout, high conversion efficiency and long service life, and capability of effectively solving the problems of unreasonable spatial layout, low conversion efficiency and short service life of the conventional energy conversion device.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

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 at least one such feature. In the description of the present invention, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

Each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A contact separation type friction power generating device, comprising:

a case, a closed case;

the power input shaft is arranged on the box body and generates power by utilizing energy in the environment through a power input accessory;

the transmission shaft is arranged on the box body;

the gear train enables the power input by the power input shaft to drive the transmission shaft to rotate and is used for transmitting motion and power;

the cam in the cam follower device is arranged on the transmission shaft, the follower is arranged on the side surface of the cam and fixedly arranged on the sliding block through threads, and the cam drives the follower to complete linear reciprocating motion for changing motion forms; and

and the contact separation electrification part is driven by the sliding block to complete the conversion from mechanical energy to electric energy.

2. The apparatus of claim 1, wherein the input end of the power input shaft extends a predetermined length from the housing.

3. The apparatus of claim 1, wherein the gear train comprises:

the power input shaft is fixed on the transmission shaft through a first jackscrew, the second straight bevel gear is fixed on the transmission shaft through a second jackscrew, and the first straight bevel gear is meshed with the second straight bevel gear.

4. The apparatus of claim 1, wherein said cam follower means comprises:

the cylindrical cam is arranged on the transmission shaft, the driven piece is arranged on the side face of the cylindrical cam, and the cylindrical cam drives the driven piece to do linear reciprocating motion.

5. The apparatus of claim 1, wherein the contact separation electrification component comprises:

the first contact pair and the second contact pair are arranged on the sliding block and the box body.

6. The device of claim 5, wherein the first contact pair is made of a metal material; the second contact pair is a polymer film.

7. The device of claim 6, wherein the first contact pair is adhered to the box body by an adhesive tape, and the second contact pair polymer film is adhered to both sides of the sliding block by a sponge double-sided adhesive with a preset thickness.

8. The apparatus of claim 1, comprising:

and the external unit is connected with the contact separation electrification part and finishes the collection and storage of energy.

9. The apparatus of claim 8, wherein the contact separation electrification component is connected to the external unit by a wire to accomplish collection and storage of energy.