CN203050990U - Vertical shaft offset type wind turbine provided with buffer springs - Google Patents

Abstract

The utility model discloses a vertical shaft offset type wind turbine provided with buffer springs. Two vane shafts equal in length are installed on the vertical shaft in a mutually-perpendicular mode and are matched with each other in a rotating mode. Two ends of each vane shaft are respectively provided with a light vane, and the two light vanes of each vane shaft are perpendicular to each other. A vane weight ball is installed on each vane shaft and close to the vertical shaft, and the vane weight ball and one light vane are located on two opposite sides of each vane shaft. One ends of vane shaft limiting rods are installed on the vertical shaft, and the other ends of the vane shaft limiting rods extend out along the axial directions of the vane shafts. The side faces of the extending ends of the vane shaft limiting rods are respectively provided with one buffer spring, and therefore rigid contact on limiting points is changed into elastic contact. Due to the fact that the vane weight balls are installed, the downwind light vanes can be located at the vertical position through breeze, a large wind collection face can be obtained, and therefore the wind turbine is strong in breeze generating capacity, low in start-up wind speed, wide in suitable area and high in generating operating time ratio. Due to the fact that the buffer springs are installed and the rigid contact is changed into the elastic buffering contact, the vertical shaft offset type wind turbine is small in impact force and low in noise.

Description

Vertical axis offset wind turbine with buffer spring

technical field

The utility model relates to an offset-type vertical-axis wind machine, in particular to a vertical-axis offset-type wind machine with buffer springs.

Background technique

Today, non-renewable energy sources such as oil, coal, and natural gas are facing depletion of reserves, rising prices, and even serious pollution of the earth's environment. The danger of nuclear fission power generation is high, and nuclear waste pollutes the environment and is difficult to deal with; it is not feasible to use nuclear fusion energy to generate electricity. However, solar energy and wind energy are renewable energy sources that do not pollute the environment. Therefore, all countries are vigorously developing clean and renewable energy represented by wind energy and solar energy.

In the current field of wind energy utilization, most of the existing wind turbines with large installed capacity are mostly in standby or shutdown state, and the utilization efficiency of wind turbines is extremely low. Under some special conditions, even in order to make the wind turbine stand by and generate electricity at any time, it is necessary to input control power to the wind turbine, which makes the wind turbine appear in a negative power output state, which greatly reduces the utilization rate of wind energy. Affected by the structure of the wind turbine rotor, the existing wind generators mainly have the following problems: 1. The starting wind speed and the rated wind speed are too high, seriously deviating from the actual situation. It is necessary to develop a wind turbine suitable for use in most areas, and its start-up wind speed and rated wind speed are all very low; 2. The blades of the existing wind rotors are thin and long, with extremely low solidity, and most of them leak from the gaps between the blades. The wind energy has not been fully utilized; 3. The airfoil design of the wind blade is unreasonable. The most widely used wind rotor blades are designed according to the rotor structure of helicopters. The structural design of the helicopter's rotor is to use the airflow to increase its lift, but the wind rotor blades need to overcome this force, which is the opposite process. 4. The torsion angle of most wind rotor blades is fixed and cannot adapt to different wind speeds. But in practical application, the wind speed is random. Therefore, the wind wheel generally works in a non-design working state, the overall efficiency is low, and it is difficult to start.

In the existing offset-blade vertical-axis wind power generator, the cross-sectional area of the blade is increased, the wind-catching ability is improved, and the start-up wind speed is reduced. Adjusting the angle of inclination of the blades can adjust the rotation speed of the fan. The increase of the cross-sectional area of the blades can greatly reduce the length of the blades, so that the total weight of the blades of the wind rotor can be greatly reduced, which can maximize the use of wind energy to generate electricity. It occupies a small area, works in all directions, and starts quickly.

There are three schemes for existing offset-blade vertical-axis wind turbines. 1. Install the blade bracket on the vertical axis, the blades are installed at both ends of the blade bracket in the form of offset, and the blades are controlled by the motor. When the wind is down, the blades are controlled to receive the wind vertically, and the wind energy is converted into the rotational mechanical energy of the impeller. While in the headwind, the control makes the blades in a horizontal position without any resistance to the wind. 2. The blade support is installed on the vertical axis, and the blades are installed at both ends of the blade support in the form of an offset. A 90-degree unidirectional limit device is installed on the blade bracket so that the unidirectional deviation of the blade does not exceed 90 degrees. When the wind comes from any direction, one side of the blade remains in place due to the one-way limiting effect, and the other side of the blade rotates in the same direction as the wind. 3. The blade support is installed on the vertical axis, and the blades are installed at both ends of the blade support at an angle of 90 degrees in the form of an offset distance. A limiting device with a maximum swing angle of 45 degrees is installed on the blade bracket. Wind from any direction makes the blade at one end of the blade support swing to a horizontal position; the blade at the other end of the blade support swings to a vertical position under the action of wind force, and the wind acts on the blade in the vertical position to make the blade drive the impeller to rotate; when the vertical position When one blade swings to the downwind position, a blade of the other blade bracket swings to the vertical position under the action of wind force, which continues to drive the impeller to rotate.

Although the above schemes are much larger in solidity than conventional wind rotors and have a strong ability to capture wind, due to the self-weight of the blades, a certain amount of wind pressure is required to change the blades from horizontal to vertical, so especially when the wind speed is very low Next, it is more difficult to start. And when the blade is larger, its mass is also larger. During operation, when the blade rotates from a horizontal position to a vertical position, the speed is high, the inertial collision impact is large, energy loss is caused, and the noise is large.

Therefore, it is necessary to develop and design a new type of wind turbine, so that when the wind speed is very low, the inertial collision impact is smaller, the energy loss is small, and the noise is small.

Utility model content

In order to overcome the high start-up wind speed of existing fans, the low solidity of the wind rotor, the small wind energy utilization coefficient, the fixed airfoil and torsion angle of the wind rotor blades and the inability to adapt to different wind speeds, the power consumption of driving rotation, and the cost of adjusting the blade position The electric drive motor rotates, the system is complicated, and it cannot be reset reliably. The utility model provides a vertical axis offset wind turbine with a buffer spring.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

Vertical shaft offset wind turbine with buffer spring, including vertical shaft, blade shaft, lightweight blade, blade weight ball, blade shaft limit lever and buffer spring;

The vertical shaft is vertically installed on the tower and can rotate freely;

Two equal-length blade shafts are installed on the vertical shaft vertically in a horizontal radial shape, and rotate with the vertical shaft;

The two ends of the blade shaft are respectively equipped with lightweight blades, and the two light blades on each blade shaft are perpendicular to each other;

The blade weight ball is installed on the blade shaft and close to the vertical shaft, and the blade weight ball and the lightweight blade are located on opposite sides of the blade shaft;

One end of the blade shaft limit rod is installed on the vertical shaft, and the other end protrudes along the axial direction of the blade shaft;

The buffer spring is an involute compression buffer spring, which is installed on the side of the extension end of the blade shaft limit rod.

Compared with the prior art, the vertical axis offset wind turbine with buffer spring of the present invention has the following advantages:

1. The starting wind speed of the wind wheel is small: the combination of light blades and blade weight balls, very weak wind can make the headwind light blades in a vertical position and obtain a larger wind catching surface, so the wind turbine has strong power generation capacity. The start-up wind speed is small, suitable for a wide range of areas, and the proportion of power generation operation time is high.

2. Small impact: due to the installation of the buffer spring, the rigid contact during the limit is changed into an elastic buffer contact, which has small impact and low noise.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a vertical axis offset wind turbine with buffer springs.

In the attached drawings: 1—blade shaft limit lever; 2—vertical shaft; 3—blade weight ball; 4—buffer spring; 5—blade shaft; 6—light blade.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

As shown in Figure 1 , the vertical axis offset wind turbine with buffer spring includes a vertical shaft 2 , blade shaft 5 , lightweight blade 6 , blade counterweight ball 3 , blade shaft limit lever 1 and buffer spring 4 .

Wherein, the vertical shaft 2 is vertically installed on the tower and can rotate freely. Two equal-length blade shafts 5 are mounted on the vertical shaft 2 perpendicular to each other in a horizontal radial shape, and are rotatably matched with the vertical shaft 2 . The two ends of the blade shaft 5 are respectively equipped with lightweight blades 6, and the two light blades 6 on each blade shaft 5 are perpendicular to each other. The blade weight ball 3 is installed on the blade shaft 5 and close to the vertical shaft 2 , and the blade weight ball 3 and the lightweight blade 6 are located on opposite sides of the blade shaft 5 . Due to the installation of the blade counterweight ball 3, the breeze can make the downwind lightweight blade 6 in a vertical position, thereby obtaining a larger wind catching surface, so the fan has a strong power generation capacity in a breeze, and the starting wind speed is small, suitable for a wide range of areas, and the power generation running time The ratio is high.

One end of the blade shaft limit rod 1 is installed on the vertical shaft 2, and the other end protrudes along the axial direction of the blade shaft 2, so that the lightweight blade 6 can only move freely within the range of 0~90° between the horizontal and vertical positions. turn. The buffer spring 4 is an involute compression buffer spring, which is installed on the side of the extension end of the blade shaft limit rod 1, so that the rigid contact at the limit point becomes elastic contact. The buffer spring 4 is wound by a rigid steel wire with a certain diameter, and the diameter of the spring changes gradually and continuously from one end to the other end from large to small involutes, so that its stubbornness coefficient continuously changes. In order to make the blade obtain the maximum wind-catching surface at a wide wind speed, the axial height of the spring is very small; due to the installation of the buffer spring 4, the steel contact is changed into an elastic buffer contact, and the impact is small and the noise is low; Due to the continuous change of its stubborn coefficient, it can adapt to a wide range of wind speeds.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the utility model can be Modifications or equivalent replacements of the technical solutions without departing from the purpose and scope of the technical solutions of the utility model shall be covered by the claims of the utility model.

Claims (1)

1. Vertical shaft offset wind turbine with buffer spring, characterized by: including vertical shaft (2), blade shaft (5), lightweight blade (6), blade weight ball (3), blade shaft limiter Rod (1) and buffer spring (4); The vertical shaft (2) is vertically installed on the tower and can rotate freely; Two equal-length blade shafts (5) are mounted on the vertical shaft (2) vertically and radially in a horizontal pattern, and rotate with the vertical shaft (2); Both ends of the blade shaft (5) are respectively equipped with lightweight blades (6), and the two lightweight blades (6) on each blade shaft (5) are perpendicular to each other; The blade weight ball (3) is installed on the blade shaft (5) and close to the vertical shaft (2), and the blade weight ball (3) and the lightweight blade (6) are located on opposite sides of the blade shaft (5) ; One end of the blade shaft limit rod (1) is installed on the vertical shaft (2), and the other end protrudes along the axial direction of the blade shaft (2); The buffer spring (4) is an involute compression buffer spring, which is installed on the side of the extension end of the blade shaft limit rod (1).

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