CN205841099U - Miniature portable wind-driven generator - Google Patents

Abstract

This practicality discloses a kind of miniature portable wind-driven generator, including motor, high gear, high speed shaft, slow-speed shaft, low-speed gear, blade rack and blade；Described blade is installed with on slow-speed shaft by blade rack, the most bonded on slow-speed shaft and high speed shaft is fixed with low-speed gear and high gear, is connected and carries out transmission between low-speed gear and high gear；High gear drives motor rotary electrification.This practicality employs the design of high-speed electric expreess locomotive+two-stage speed change and instead of the slowspeed machine design of original small-sized fan, employs vertical axis design and replaces small-sized fan trunnion axis design all the time, significantly reduces cost, beneficially equipment promotion.Meanwhile, this practicality have employed the design of easy-disassembling-assembling structure, strengthens the portability of system.

Description

Small Portable Wind Turbine

technical field

The utility model belongs to the field of electric equipment, and in particular relates to a small portable wind power generator.

Background technique

Nowadays, people's demand for mobile devices is more and more extensive, but the battery power bottleneck has become one of the limitations for mobile devices to play a greater role. As one of the renewable new energy sources, wind energy is widely distributed and easy to collect. It has gradually become an ideal mobile energy source. Therefore, if there is a portable small wind generator, it can be used as a power source for mobile equipment.

Nowadays, most of the existing small wind turbines are of fixed design, such as the small wind turbine with the patent application number 201320017202.8, which is connected to the ground through bolts, which not only prevents the wind turbine from being removed in a short time, but also The applicable places of the blower fan are limited, that is, the blower fan can only be used in a place with a base specially designed for it, which causes great inconvenience.

In addition, the existing small fans are of integral design, which is not easy to disassemble and assemble, which further weakens the function of their mobile use. Existing small fans are all horizontal-axis fans, which can only generate electricity normally when the blades are facing the wind direction. Therefore, all horizontal-axis fans need to design complex steering mechanisms to ensure the normal operation of the fans. Such a steering mechanism is not only complex in structure and easy to damage, but also further weakens the mobility of the fan, and at the same time, the electric energy consumed in steering also reduces the operating efficiency of the fan. At the same time, small fans use expensive low-speed motors, and the cost of low-speed motors is often several times or even dozens of times that of high-speed motors, which greatly limits the promotion of small fans. Fans are imminent.

Contents of the invention

The utility purpose is to solve the problems existing in the background technology and provide a small portable wind generator. The concrete scheme adopted in this utility is as follows:

A small portable wind generator, including a motor, a high-speed gear, a high-speed shaft, a low-speed shaft, a low-speed gear, a blade bracket and blades; The low-speed gear and the high-speed gear are matched and connected for transmission between the low-speed gear and the high-speed gear; the high-speed gear drives the motor to rotate to generate electricity.

As a preference, the blades are arranged vertically, the number is 5 pieces and they are distributed in an equidistant annular array on the cylindrical surface with the low-speed shaft as the axis; The bracket is connected and fixed to the low-speed shaft; the connection between the blade and the blade bracket is detachable clamping and fixing.

Further, the blade support is fixed on the low-speed shaft through a nut, and the nut is connected with the external thread on the low-speed shaft by a screw pair.

Preferably, the blade is made of aluminum alloy and adopts a hollow structure.

Preferably, the blades are lift-type blades.

As a preference, the low-speed gear has a modulus of 0.8 and the number of teeth is 71; the high-speed gear is a double-layer gear, wherein the number of upper teeth is 15, the modulus is 0.8, and the number of lower teeth is 59, and the modulus is 0.6; the low-speed gear and the high gear A speedup ratio of 1:39 is formed.

Preferably, the lower half of the low-speed shaft, the high-speed gear, the high-speed shaft, and the low-speed gear are all arranged in the inner space formed by the detachable combination of the lower case and the upper case.

Further, both the low-speed shaft and the high-speed shaft are fixed on the box by angular contact ball bearings.

Preferably, the motor is a high-speed motor.

Compared with the prior art, the utility model has the following beneficial effects:

1. This utility uses a high-speed motor + two-stage variable speed design to replace the low-speed motor design of the original small fan, which greatly reduces the cost and facilitates the promotion of equipment

2. This utility uses a vertical axis design instead of the horizontal axis design of small fans. Since the vertical axis design can accept wind energy from all directions, it saves the complicated steering mechanism, saves cost, improves reliability and portability.

3. This utility adopts a structural design that is easy to disassemble and assemble, which effectively reduces the carrying volume of the device without affecting the user experience, enhances the portability of the system, and can be used for charging mobile devices.

Description of drawings

Fig. 1 is a structural diagram of a small wind power generator;

Figure 2 is a diagram of the cooperation between the blade bracket and the low-speed shaft;

Figure 3 is the assembly process of the small wind turbine when it is in use, where the arrows represent the steps;

In the figure: motor 1, high-speed gear 2, first angular contact bearing 3, high-speed shaft 4, low-speed shaft 5, second angular contact bearing 6, lower box 7, low-speed gear 8, upper box 9, first nut 10 , the first blade support 11 , the blade 12 , the second blade support 13 , and the second nut 14 .

detailed description

The utility model is further elaborated and described below in conjunction with the accompanying drawings and specific embodiments. The technical features of the various implementations in the present application can be combined accordingly on the premise that there is no conflict with each other.

A small portable wind power generator, motor 1, high-speed gear 2, first angular contact bearing 3, high-speed shaft 4, low-speed shaft 5, second angular contact bearing 6, lower box 7, low-speed gear 8, upper box 9 , the first nut 10 , the first blade support 11 , the blade 12 , the second blade support 13 , and the second nut 14 .

The practical generator of the present invention is divided into two parts as a whole, a blade, a supporting part and a variable-speed transmission part, wherein the blade and the supporting part are responsible for receiving wind energy through the blade, and transmitting the wind energy to the low-speed shaft through the blade bracket. The variable speed power generation part is responsible for transferring the torque on the low speed shaft to the motor through the speed change mechanism to complete the power generation.

The specific structure of the blades is shown in Figure 1. The blades 12 are vertically arranged, a total of 5 pieces, and are distributed in an equidistant annular array on the cylindrical surface with the low-speed shaft 5 as the axis, forming a five-blade wind wheel design. The blades 12 The lift-type blade 12 is adopted, and the lift force is obtained by using the difference in flow velocity on both sides of the blade 12, and the impeller is driven to rotate by the lift force. The blade 12 is made of aluminum alloy and adopts a hollow structure. In this embodiment, the blade 12 is a standard airfoil NACA63-412. It is the first low-speed airfoil series established by NACA in the United States. Compared with other early airfoils, it has a higher maximum lift coefficient and a lower drag coefficient. The airfoil we selected belongs to NACA's six-digit airfoil, which is characterized by low drag characteristics within a certain range of lift coefficient, and there will be satisfactory results under non-design conditions. This airfoil has a relatively high lift coefficient and a relatively high critical Mach number.

The structure of the supporting part is as follows: In order to ensure stability, at the two thirds of each blade 12, the horizontal blade brackets are respectively connected and fixed with the low-speed shaft 5, which are respectively the first blade bracket 11 and the second blade bracket 11 in the figure. Two blade brackets 13. The connection between the blade 12 and the blade bracket is a detachable clamping and fixing method. The specific fixing method is: install two rivets at the three equal points of the blade 12 for the positioning of the blade 12 clamping and fixing, and balance the blade. 12 is the vertical gravity. The blade 12 is installed on the low-speed shaft 5 through the blade bracket. The first blade bracket 11 and the second blade bracket 13 are respectively fixed on the low-speed shaft 5 by the nut 10 and the second nut 14. The blade bracket part is responsible for supporting the blade 12 and The torque experienced by the blades 12 is transmitted to the shaft. The low-speed shaft 5 of the fixed support is provided with the cylindrical tapping of the two facets that has an external threaded shaft. As shown in FIG. 2 , correspondingly shaped shaft holes are provided at the first blade bracket 11 and the second blade bracket 13 to transfer the torque received by the blade brackets to the shaft. To prevent the instability caused by the up and down vibration of the bracket, the nut and the external thread on the low-speed shaft 5 are connected by a screw pair.

The variable speed transmission part is responsible for accelerating the rotation of the low-speed shaft 5 and then transmitting it to the motor 1, and its main part is the gear set in the box. The box body can be disassembled and assembled into a lower box body 7 and an upper box body 9 . Low-speed gear 8 and high-speed gear 2 are fixed on low-speed shaft 5 and high-speed shaft 4 respectively by key connection in the gear set. The low-speed shaft 5 and the high-speed shaft 4 are fixed on the lower casing 7 and the upper casing 9 by the first angular contact bearing 3 and the second angular contact bearing 6 .

The gear set part is responsible for the transition from the low speed of the blade 12 to the high speed of the motor 1, which has achieved the effect of high power and stable power generation. The gear set consists of high-speed gear 2 and low-speed gear 8 two-stage reduction, wherein the low-speed gear 8 has a modulus of 0.8 and a number of teeth of 71, and is fixed on the low-speed shaft 5 through a key connection. The high-speed gear 2 is a double-layer gear, wherein the upper gear has 15 teeth and a modulus of 0.8, the lower gear has 59 teeth and a modulus of 0.6, and is fixed on the high-speed shaft 4 .

The two-stage gears cooperate with each other to form an acceleration ratio of 1:39, so that the 12 sets of blades can drive the motor 1 to reach its rated power generation speed through the high-speed gear 2, so that this design can use a relatively cheap high-speed motor 1 to replace the expensive low-speed motor 1 to generate electricity.

The installation process of the utility device is as shown in Figure 3, specifically:

1. In carrying, the first blade bracket 11 and the second blade bracket 13, the blade 12 are placed separately from the main part to save space;

2. In use, the user needs to put the bracket 11 on the low-speed shaft 5 first, align with the shape of the low-speed shaft 5, and install the first nut 10 .

3. Install five blades 12, and the blades will be inserted into the corresponding holes on the bracket. Since the outline of the rivets is larger than the outline of the holes, the blades 12 will be initially supported by the rivets on the first blade bracket 11

4. Install the second blade bracket 13, the center hole is aligned with the shape of the low-speed shaft 5, and because the first blade bracket 11 has openings corresponding to the 5 blades, the bracket will be placed on the 5 blades, and because the outline of the rivet part is larger than The contour line of the opening part, the first blade support 11 is supported by the blade 12, and the blade 12 is completely restricted in a fixed position at the same time, the second nut 14 is installed, and the installation is completed.

The operation process is as follows:

1. The wind blows through the blade 12 to provide torque for the blade 12;

2. The blade transmits torque to the first blade support 11 and the second blade support 13;

3. The first blade support 11 and the second blade support 13 transmit the torque to the low-speed shaft 5;

4. The low-speed shaft 5 will drive the low-speed gear 8;

5. The low-speed gear 8 drives the high-speed gear 2;

6. The high-speed gear 2 drives the motor 1 to complete the power generation process.

The disassembly process is as follows:

1. Remove the second nut 14;

2. Take off the first blade bracket 11 and the blade 12;

3. Remove the first nut 10;

4. Remove the second blade support 13;

5. At this point, the disassembly is complete, and the small fan can be carried in a small volume.

The above-mentioned embodiment is only a preferred solution of the present application, but it is not intended to limit the present application. Various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present application. Therefore, all technical solutions obtained by means of equivalent replacement or equivalent transformation fall within the scope of protection of this application.

Claims (9)

1. a miniature portable wind-driven generator, it is characterised in that include motor, high gear, high speed shaft, slow-speed shaft, low speed Gear, blade rack and blade；Described blade is installed and on slow-speed shaft by blade rack, on slow-speed shaft and high speed shaft respectively Bonded it is fixed with low-speed gear and high gear, is connected between low-speed gear and high gear and carries out transmission；High speed tooth Wheel drive motor rotary electrification.

2. miniature portable wind-driven generator as claimed in claim 1, it is characterised in that the vertical setting of described blade, quantity Be 5 and in equidistant ring array distribution on the cylinder with slow-speed shaft as axle center；At two trisection points of blade, respectively It is attached fixing with the blade rack of level and slow-speed shaft；Connected mode between blade and blade rack is detachable folder Hold fixing.

3. miniature portable wind-driven generator as claimed in claim 2, it is characterised in that described blade rack is solid by nut On slow-speed shaft, nut uses screw pair to be connected with the external screw thread on slow-speed shaft.

4. miniature portable wind-driven generator as claimed in claim 1, it is characterised in that described blade is made up of aluminium alloy, And take the structure of hollow out.

5. miniature portable wind-driven generator as claimed in claim 1, it is characterised in that described blade is lift-type blade.

6. miniature portable wind-driven generator as claimed in claim 1, it is characterised in that described low-speed gear modulus is 0.8, The number of teeth is 71；High gear is double-layer gear, its at the middle and upper levels the number of teeth be 15, modulus is 0.8, and lower floor's number of teeth is 59, and modulus is 0.6；Low-speed gear and high gear form the speed-up ratio of 1:39.

7. miniature portable wind-driven generator as claimed in claim 1, it is characterised in that the lower half of described slow-speed shaft and height Speed gear, high speed shaft, low-speed gear may be contained within lower box and the detachable inner space combined of upper box.

8. miniature portable wind-driven generator as claimed in claim 7, it is characterised in that described slow-speed shaft and high speed shaft by It is fixed on casing by angular contact ball bearing.

9. miniature portable wind-driven generator as claimed in claim 1, it is characterised in that described motor is high-speed electric expreess locomotive.