CN104295441B - A vertical axis wind turbine - Google Patents

Abstract

The invention aims to provide a vertical shaft wind power machine which comprises a machine base, a fan main shaft, a drive shaft, an electric generator, outer blades and inner blades. The drive shaft is sequentially sleeved with an outer blade beam frame, an inner blade beam frame, an inner blade support and an outer blade support from top to bottom. The outer blades are arranged between the outer blade beam frame and the outer blade support. The inner blades are arranged between the inner blade beam frame and the inner blade support. The inner blades are close to the drive shaft relative to the outer blades. A rack is fixed to the machine base. The fan main shaft is arranged in the rack. The drive shaft is connected with the fan main shaft. A fan belt wheel is fixed to the drive shaft. The electric generator is fixed to the machine base. The fan belt wheel and a belt wheel of the electric generator are connected through a belt or a chain in a wound mode. The lower portion of the inner blade support is provided with a protrusion, the surface of the protrusion is provided with a friction piece, the upper portion of the outer blade support is provided with a groove matched with the protrusion, and the surface of the groove is provided with a friction piece. By means of the vertical shaft wind power machine, the wind energy utilization rate is increased, and the maximum power generation efficiency can be achieved at the low wind speed and the high wind speed.

Description

A vertical axis wind turbine

technical field

The invention relates to a wind power generating device.

Background technique

As my country's energy demand continues to increase, the consumption of oil, natural gas, and coal continues to increase, and the accompanying pollution is becoming more and more serious. The development of new types of new energy has become a research hotspot in various countries. Wind power belongs to the category of new energy and is a renewable energy. Making full use of wind energy to generate electricity with high efficiency has become the focus of research at home and abroad. The patent "A Vertical Axis Wind Power Generator" (Patent No. 201410114990.1) adopts the layout of upper and lower blades and uses a variable inertia flywheel mechanism to achieve start-up at lower wind speeds and continuous operation at higher wind speeds. The power generation efficiency of the fan will be greatly reduced under high wind speed. The patent "A Vertical Axis Wind Power Generator" (Patent No. 200910132493.3) is mainly composed of a vertical shaft perpendicular to the ground, a generator, a hub and blades, and adopts the function of automatic pitch adjustment to solve the problem of high-power lift-type vertical axis wind power generation. The problem that the machine cannot start automatically at low wind speeds widens the range of wind speeds that the vertical axis wind turbines can adapt to and increases the power generation of the vertical axis wind turbines, but it also does not solve the problem of power generation efficiency at higher wind speeds. Issues with large changes. The blade arm of the patent "Vertical Axis Wind Power Generator and Its Blade Arm" (Patent No. 201210018981.3) can generally form an arc-shaped section without any acute angle, so it can effectively eliminate problems such as stress concentration and structural fragility. In addition, since the wind-receiving area of the arc-shaped section is larger than that of the V-shaped section, the increased torque is stronger, which can reduce the start-up wind speed required by the wind turbine, but the difference in power generation efficiency between high wind speed and low wind speed is large. The problem was not resolved. The existing vertical wind turbines have low utilization rate of wind energy, complex structures, and high manufacturing costs.

Contents of the invention

The object of the present invention is to provide a vertical axis wind turbine capable of achieving maximum power generation efficiency at both low and high wind speeds.

The purpose of the present invention is achieved like this:

The present invention is a vertical axis wind turbine, which is characterized in that it includes a machine base, a fan main shaft, a drive shaft, a generator, outer blades, and inner blades, and the drive shaft is sequentially fitted with outer blade beams and inner blade beams from top to bottom. rack, inner blade bracket, outer blade bracket, the outer blade is installed between the outer blade beam frame and the outer blade bracket, the inner blade is installed between the inner blade beam frame and the inner blade bracket, and the inner blade is adjacent to the drive shaft relative to the outer blade, There is a frame fixed on the frame, the main shaft of the fan is installed in the frame, the drive shaft is connected to the main shaft of the fan, the fan pulley is fixed on the drive shaft, the generator is fixed on the frame, the pulley of the fan and the pulley of the generator pass through the belt Or the chain is wound and connected, the lower part of the inner blade support is provided with a protrusion, and the friction plate is installed on the surface of the protrusion, and the upper part of the outer blade support is provided with a groove matching the protrusion, and the friction plate is installed on the surface of the groove.

The present invention may also include:

1. It also includes a heavy hammer clutch device. The heavy hammer clutch device includes a heavy hammer, a support rod, a connecting rod, and a fixed rotating block of the connecting rod. The boss at the lower extreme position of the rod fixed rotating block, one end of the connecting rod is installed on the connecting rod fixed rotating block, the other end of the connecting rod is equipped with a weight, one end of the connecting rod is connected with the connecting rod, and the other end of the connecting rod is connected with the inner blade bracket.

2. There are two outer blades and two inner blades, the two outer blades are symmetrically arranged relative to the drive shaft, the two inner blades are symmetrically arranged relative to the drive shaft, a strut, a connecting rod and a weight A weight-type clutch unit is formed, and there are two weight-type clutch units, which are arranged symmetrically with respect to the drive shaft.

3. The outer blades are streamlined, and the inner blades are "C" shaped. When there are two inner blades, the two inner blades face opposite to form a disconnected "S" shape.

The advantage of the present invention is that: the present invention adopts the layout of the inner and outer blades, combined with the movement characteristics of the weight at different speeds, realizes that at low wind speeds, the inner and outer blades simultaneously drive the main shaft to generate electricity, and at high wind speeds, the inner blade bracket Under the action of the centrifugal force generated by the weight, the upward movement is separated from the outer blade support, so that the torque generated by the rotation of the inner blade has no effect on the main shaft, and only the outer blade drives the main shaft to generate electricity. Different wind speeds use different combinations of blades to make full use of wind energy for power generation, which improves the utilization rate of wind energy and has a wide range of applications.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the arrangement of outer blades and inner blades of the present invention;

Fig. 3 is the schematic diagram of the clutch mechanism of the heavy hammer type clutch device of the present invention;

Fig. 4 is a schematic diagram of the rotating and fixing mechanism of the weight connecting rod of the weight clutch device of the present invention.

detailed description

The present invention is described in more detail below in conjunction with accompanying drawing example:

1 to 4, a vertical axis wind turbine according to the present invention mainly includes a fan base 2, a generator 20, pulleys 3, 21, a drive shaft with pulleys, a fan main shaft 4, outer blades 9, inner blades 8, outer blades Support 7, inner blade support 18, servo drive unit, weight type clutch device. The pulley drive shaft of the vertical axis wind turbine is connected to the fan base 2 through bearings, the generator 20 is installed on the fan base 2 through bolts, and connected to the pulley drive shaft through a pulley, and the pulley drive shaft is connected to the fan main shaft 4 through a flange Connected, the outer blade support 7 and the inner blade support 18 are installed on the fan main shaft 4, the outer blade 9 and the inner blade 8 are respectively installed on the outer blade support 7 and the inner blade support 18, the outer blade 9 adopts ordinary streamlined blades, and the inner blade 8 adopts Close to the 'C' type blade, the servo drive device is connected with the outer blade 9, and the hammer type clutch device is connected with the main shaft 4 of the fan.

The outer blade 9 adopts ordinary streamlined blades, and the ordinary streamlined blades can generate electricity at any wind speed through position servo control, and the inner blade 8 adopts a near 'C' type blade, and two near 'C' type blades form an 'S' type blade, In this way, the low-speed power generation effect of the 'S'-shaped blade is brought into play, and the low-speed power generation efficiency of the fan is improved.

Both the outer blade support 7 and the inner blade support 18 have friction plates. When the wind speed is low, the hammer type clutch device is under the action of gravity, and the inner blade support 18 and the outer outer blade support 7 are connected together by friction, so that the outer blade support 7 The blade 9 and the inner blade 8 move together to drive the generator to generate electricity.

When the wind speed is high, under the action of the centrifugal force of the heavy hammer, the centrifugal force generated by the heavy hammer clutch device through the connecting rod rotation device balances the gravity and frictional force, and the inner blade bracket 18 on the fan main shaft 4 moves upwards and connects with the outer outer blade bracket. 7 is separated, so that the outer blade 9 rotates to generate electricity, while the rotation of the inner blade 8 has no effect on the generator 20, which reduces the influence of the 'S' type blade on the fan when the wind speed is high.

The universal wheel 1 is adopted at the bottom of the wind turbine, which can be placed in any position. The fan outer blade 9 is fixed between the outer blade bracket 7 and the outer blade beam frame 10 , and the fan inner blade 8 is fixed between the inner blade bracket 18 and the inner blade beam frame 11 . When the wind speed is low, the inner blade support 18 of the present invention is in contact with the outer blade support 7, and the outer blade 9 and the inner blade 8 rotate together under the action of the low-speed wind, and the wind turbine pulley drive shaft 17 is connected to the fan main shaft 4 through a flange , the fan main shaft 4 is installed on the base 2 through bearings, and is isolated from the outside world through the frame 5. The frame 5 is fixed with the base 2. When the fan main shaft 4 rotates, it drives the drive shaft 17 to rotate, and the fan main shaft 4 passes through the pulley 3. Drive the pulley 21, and then drive the generator 20, so as to achieve the purpose of generating electricity under low wind speed. When the wind speed is high, the inner blade support 18 and the outer blade support 7 of the present invention are separated under the action of the weight clutch device 12, and the rotation of the inner blade 8 has no force effect on the generator. Under the action of the rotational moment of the outer blade 9, As the drive shaft 17 rotates, the sleeve 19 is sleeved on the outside of the drive shaft 17 and rotates accordingly. The rotation of the drive shaft 17 drives the fan main shaft 4 to rotate, and the fan main shaft 4 drives the generator 20 to rotate through the pulley 3 and the pulley 21, thereby achieving The purpose of high-speed wind power generation.

In conjunction with Fig. 2, described outer blade 9 adopts common streamlined blade, and inner blade 8 adopts approximate 'C' type blade to form 'S' type blade. At high speeds, the outer blades 9 automatically change pitches through the servo drive unit 6 . At low speed, the outer blade 9 and the driven blade 8 rotate together, so that the low-speed start-up performance of the wind turbine is greatly improved.

In conjunction with Fig. 3, the clutch mechanism of the heavy hammer type clutch device, the bottom of the inner blade support 18 and the upper part of the outer blade support 7 have friction plates, the pulley drive shaft 17 cooperates with the bearing 22, and the outer side of the bearing has a bearing stop ring 23, Bearing retaining ring 23 inside is equipped with sealing ring 24, when wind speed is low, because inner blade support bottom 18 and outer blade support 7 bottoms have friction plates, inner blade support 18 bottoms are closely connected with outer blade support 7 bottoms. When the wind speed is high, the bottom of the inner blade support 18 is separated from the bottom of the outer blade support 7 .

Referring to Fig. 4 , the heavy hammer connecting rod rotation fixing mechanism of the heavy hammer type clutch device, the weight 12 is supported by the support rod 13, connected with the connecting rod rotation fixing mechanism 15 through the connecting rod 14, and the connecting rod rotation fixing mechanism 15 Including bearing lower retaining ring 28, bearing upper retaining ring 26, bearing 27, bearing cover 25. The strut 13 is connected with the inner blade beam frame 11, the linear rotation bush 16 is fixed by the set screw 30, the upper part is fixed by the linear rotation bush cover 29, the inner driven blade 8 rotates with the pulley drive shaft 17 at low speed, At low speed, the weight 12 hangs down naturally, and the gravity of the weight 12 acts on the pulley drive shaft 17 through the connecting rod rotation fixing mechanism 15 . At high speed, the weight 12 is lifted to drive the inner blade support 8 to move upward as a whole.

In conjunction with the accompanying drawings, the described high-efficiency vertical-axis wind turbine works like this: first, the high-efficiency vertical-axis wind turbine is moved to a suitable position. They are connected together under the action of friction, and the outer blades and inner blades move together to generate electricity. When the wind speed is high, under the action of the centrifugal force of the weight 12, the centrifugal force balances the gravity and friction of the inner blade bracket, the inner blade bracket 18 is separated from the bottom of the outer blade bracket 7, the outer blade 9 rotates to generate electricity, and the rotation of the inner blade 8 There is no force effect on the generator, which reduces the influence of the 'S' blade on the fan when the wind speed is high. High-efficiency vertical-axis fans can achieve maximum power generation efficiency at low and high wind speeds, improve the utilization rate of wind energy, and are of great significance to the full utilization of wind energy.

Claims (3)

1. A vertical axis wind turbine, characterized in that it includes a base, a main shaft of the fan, a drive shaft, a generator, an outer blade, an inner blade, and a heavy hammer clutch device, and the drive shaft is sequentially fitted with outer blades from top to bottom beam frame, inner blade beam frame, inner blade bracket, outer blade bracket, the outer blade is installed between the outer blade beam frame and the outer blade bracket, the inner blade is installed between the inner blade beam frame and the inner blade bracket, and the inner blade is relative to the outer The blades are close to the drive shaft, the frame is fixed on the frame, the fan shaft is installed in the frame, the drive shaft is connected to the fan shaft, the fan pulley is fixed on the drive shaft, the generator is fixed on the frame, the fan pulley and the generator The belt pulley of the machine is wound and connected by a belt or a chain. The lower part of the inner blade support is provided with a protrusion, and the friction plate is installed on the surface of the protrusion. The upper part of the outer blade support is provided with a groove matching the protrusion, and the friction plate is installed on the surface of the groove; The heavy hammer clutch device includes a heavy hammer, a rod, a connecting rod, and a fixed rotating block of the connecting rod. The fixed rotating block of the connecting rod is sleeved on the drive shaft through a bearing. One end of the connecting rod is installed on the fixed rotating block of the connecting rod, the other end of the connecting rod is installed with a weight, one end of the connecting rod is connected with the connecting rod, and the other end of the connecting rod is connected with the inner blade bracket. 2. A vertical axis wind turbine according to claim 1, characterized in that: there are two outer blades and two inner blades, the two outer blades are arranged symmetrically with respect to the drive shaft, and the two inner blades Arranged symmetrically with respect to the drive shaft, a strut, a connecting rod and a weight form a weight-type clutch unit, and there are two weight-type clutch units, which are arranged symmetrically with respect to the drive shaft. 3. A vertical axis wind turbine according to claim 1 or 2, characterized in that: the outer blades are streamlined, and the inner blades are "C"-shaped. When there are two inner blades, the two inner blades In the opposite direction, forming a disconnected "S" shape.