JPS60119384A - Weathrproof small-sized wind-power generation apparatus - Google Patents

Abstract

PURPOSE:To allow the installation and equipment such as vane wheel, etc. to be operated under the high efficiency operation condition and improve servce life by facilitating conveyance and assembly by utilizing the standardized pipes on the market for the supporting pillars which occupy almost all the equipment weight, thus permitting light-weight construction and the reduction of construction cost. CONSTITUTION:STK steel pipes are adopted for a large parts of a supporting pipe part 2, and individual assembly part is prepared in a factory, and a construction is fabricated at a site. Therefore, the supporting pillar part 2 can be made lightweight, and conveyance and assembly can be facilitated, and the construction cost can be reduced. When the output voltage of a generator is over a rating voltage value, the control action for the blade-pitch tilt-angle of a vane wheel 5 by a servo-motor (not shown in the figure) is continued to gradually reduce the tilt angle. When the wind velocity is about 3-6m/sec or below in a standard wind-velocity range, the output voltage of the generator becomes below the rating value, and a diode rectifier (not shown in the figure) is not put into conduction, and the energy transformation in a low wind- velocity range is intentionally cut-off. Therefore, installation and equipment is designed so as to operate under the high-efficiency operation condition, and the volume can be reduced, and the service life can be prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a wind power generation device suitable for all weather conditions using a wind turbine and intended as a small-scale power source for lighting or communication in remote locations such as remote islands and mountain huts.

BACKGROUND ART The concept of utilizing wind energy is extremely old, and wind turbines have been widely used for power purposes such as pumping water, rinsing, milling flour, and sawing lumber. Furthermore, in the latter half of the 19th century, when electrical engineering rapidly developed, power supply equipment was developed in which a wind turbine was used to drive a generator to provide power, or a storage battery was used in combination for communications and lighting. Regarding the principle of converting wind energy, in addition to wind turbines, for example, systems that use rotating cylinders, or electrostatic field conversion devices that do not use wind turbines at all, have been proposed, but in reality, energy conversion equipment that uses wind turbines with rotary blades is the most effective. It accounts for the majority. In particular, horizontal axis wind turbines usually (4) often have a diameter of 4 m or more and use propeller-type blades with a narrow blade width. These are required to be sturdy and able to withstand typhoons, heavy snowfall, etc., and to ensure safe operation.
It required a large amount of construction costs, and the current management costs were also high. What should be noted in particular is that the energy conversion efficiency of conventionally designed wind turbines is lower than expected, which has disadvantages that make them unprofitable for practical use.

OBJECTS OF THE INVENTION An object of the present invention is to correct the drawbacks of conventional propeller-type wind turbine devices, and to provide a compact power supply device that basically minimizes the failure rate and reduces overhead costs. For this reason, in terms of construction costs, the pillars, which account for the majority of the equipment's weight, were designed to use commercially available standard pipes to facilitate transportation and assembly, and configurations suitable for unmanned management were adopted at various locations. In addition, regarding durability related to the occurrence of failure, the present invention aims at an all-weather structure, and the overall safety of the device is maintained at all times in terms of strength and operation and maintenance under bad weather such as typhoons and heavy snow. intended to be secured.

Furthermore, the present invention is primarily applied as a power facility like many conventional wind turbine facilities, but rather as a power source for communication of self-recorded data at a weather station, a power source for an aviation beacon light attached to a high-voltage line tower, or heavy mountain snowfall. The primary consideration is to use it as a power source for lighting and communications in mountain huts in the area.

Therefore, with the intention of avoiding the occurrence of failures, the standard wind range for use is set in the range of 3 to 6 m/8, and the wind turbine blade pitch inclination angle θ is controlled to zero for stronger winds. This allows the wind to pass freely and maintains the wind turbine in a feathered state to avoid damage. TFC At low wind speeds that do not reach the standard wind speed band mentioned above, the generator rotational speed does not reach the rated rotational speed and therefore the rated voltage cannot be obtained, making it difficult to perform floating charging on the storage battery using the constant current method9, reducing charging efficiency and reducing the storage battery. Energy conversion in the low wind speed range is intentionally cut off, as this will shorten the service life. That is, the main power source in the present invention is a storage battery,
The main purpose of the generator in the present invention is to replenish the amount of wear and tear.
Compared to the ideal wind speed of 151 rVs, it is set in a wind speed range that guarantees far greater safety and durability, so it can be expected to have no failures and a long life.

Structure of the Invention The structure of the device of the present invention can be roughly divided into a support system made of steel pipe assembly, and a fan-type impeller and a special hood on the front side of a wind turbine body that can freely rotate in the direction of the wind on the support pipe. do. It also consists of a wind turbine body system with a built-in new variable pitch control system, a generator and storage battery placed at the bottom of the strut pipe, and an electric control circuit that cooperates with these.

Each of the above-mentioned components is designed with the basic objectives of reducing costs and improving durability, and elaborate special configurations are adopted at various locations in line with this objective. For example, early adoption of a ball screw connection mechanism on the blade shaft of a blade wheel, expansion/contraction compensation means on the rotating main shaft of a wind turbine, a structure to prevent twisting of conductive cables, and a breather with a breathing function for closed spaces. Effective for preventing wear and tear (7). Further, all parts are housed in a sealed structure, and oil seal packing or labyrinth structure is used between relatively moving parts, and special attention is paid to dustproof and waterproof effects in the design.

The support system for this device is assembled using standardized steel pipes of various sizes, taking into consideration construction cost savings and strength preservation.

That is, the upper strut tube is set to have the minimum diameter, the lowermost strut tube is set to be the maximum diameter, and the diameter of the intermediate strut tube connected between these is selected to be a size between them.

The intermediate support pipe is made by connecting an arbitrary number of steel pipes having a standard length, for example, 6 m, by a connecting means such as welding, depending on the installation height of the wind turbine.

The open end of the upper support pipe is equipped with a roller bearing structure and a shaft sealing mechanism to support the wind turbine body so that it can rotate freely in the direction of the wind. In addition, in the lower support pipe, each storage box containing the generator and the storage battery is attached to the side of the support pipe wall by fixing means.
Additionally, several openable sealing lids are formed on the lower column side for internal inspection and operational maintenance.

(8) One of the features of the wind turbine body portion of the present invention is the adoption of a fan-type impeller having a wide receiving area and small diameter blades.

This is to convert wind power in the usable wind speed range of 3 to 6 m/8 into energy as efficiently as possible. A further feature is the installation of a special hood on the fuselage that surrounds the rotatable wheel. The longitudinal cross-sectional shape of the hood, which includes the rotational axis, gradually reduces its cross-section from the wind inlet, forming a contracted flow duct that is the smallest at the rotational center cross-section of the impeller, and by increasing the dynamic pressure energy, the wind flow is substantially reduced. We are trying to measure the increase. For example, if the ratio of the hood inlet diameter to the outer diameter of the impeller is set to 2=1, the area is A! = 4 times. When the outside air wind speed is 2 m/8, the wind speed at the propeller part is 8 m/s. Since the available energy is proportional to the cube of the wind speed, the available wind speed energy is 64 times greater. In this way, the primary objective is to increase the conversion efficiency and reduce the size. The second purpose of installing the hood is to prevent rain and snow from freezing in the rotating space of the impeller during cold weather by placing an electric heat sheet on the inner wall of the hood. Furthermore, the third purpose of the hood is to prevent the impeller from being damaged by flying wood chips or to prevent small birds from building nests, thereby minimizing the failure rate by installing wire mesh on the front and rear surfaces of the hood. This is a strong point.

The external outline of the wind turbine body is a torpedo-shaped one in order to reduce air resistance, as is the case with conventional wind turbines.A streamlined rotating spinner is formed on the front side of the wind turbine to surround the front end of the boss portion of the rotary blade, and the rear part of the fuselage is formed with a streamlined rotating spinner that surrounds the front end of the boss portion of the rotary blade. A similarly shaped stationary spinner is formed forming the tail.

In addition, a vertical wind rudder is provided on the upper surface of the rear part of the fuselage along the center line of the fuselage to always orient the rotation plane of the wind turbine in the direction of the wind.

Next, the internal configuration of the device, which is a feature of the present invention, will be explained. The rotary transmission system for transmitting the rotation of the horizontal axis wind turbine mentioned above to the generator installed on the ground consists of a hollow blade wheel rotating main shaft built into the wind turbine body, and a bearing running vertically inside the vertical support tube. It consists of an intermediate vertical transmission shaft and a generator drive shaft located on the base plate. Rotation transmission between these shafts is performed by a pair of bevel gears. As a particularly characteristic structure, the rotating main shaft is a hollow shaft, and in order to accommodate a variable pitch mechanism inside, multiple pairs of rollers are supported by P bearings on the inside and outside of the main shaft. Consideration has been taken to eliminate the damage caused by expansion and contraction in the axial direction of the relatively long rotating main shaft. This is to avoid fatigue failure due to repeated thermal stress due to temperature changes, and this is a necessary requirement for improving durability. The expansion and contraction action of the rotating main shaft is achieved by suppressing only the outer ring of each of the rolling bearings arranged on the rear side of the rotating main shaft by the spring biasing force, so that the rotating main shaft can be moved against the spring force when the rotating main shaft expands and contracts. This is achieved by doing. A variable pitch control system for a wind turbine according to the present invention extends from the rear to the front inside the fuselage and is housed therein. That is, a servo motor is placed at the rear of the fuselage, and a high reduction gear is connected to this.
A variable pitch control output shaft is pulled out in front of it, and further in front of the nuclear control output shaft is a variable pitch action that controls the angle of the blade axis of the impeller, and a variable pitch drive shaft and a rotating main shaft that rotate together synchronously. A special variable pitch control mechanism is arranged that can achieve a synchronous rotational action. The synchronous rotation mechanism includes a small bevel gear rotated in conjunction with an internal gear fixed to the inner wall of a hollow tube forming a rotation main shaft, and an inclined planetary bevel gear on a carrier formed at the end of the variable pitch control output shaft. This is achieved by employing an inclined planetary bevel gear mechanism consisting of three large bevel gears operatively connected to a bevel gear fixed to the lower end of the blade shaft.

Another point that has been taken into consideration in carrying out the present invention is that a ball screw mechanism is employed in the blade pitch angle changing rotation section. This was adopted in order to minimize the probability of failure occurring in the thrust receiver due to the significant radial thrust acting on the conventional variable pitch blade shaft.

The ball screw mechanism consists of a ball screw rod that stands radially outward from the center line of the wind turbine boss, a large number of steel balls, and a steel ball housing nut, and the mechanism is installed inside a hollow blade shaft. Built-in. Therefore, the large thrust caused by the radial component of the acting wind force and centrifugal force generated on each blade shaft is sufficiently absorbed by the multi-point contact action of the many steel balls lubricated with grease, making it possible to withstand high loads. , completely eliminates malfunctions. In this case, it is desirable that the unfolded twist angle of the ball screw is 2° or less. Furthermore, in the present invention, a breather with a breathing effect is attached to the wind turbine body and the support tube wall in order to increase the service life of the device. This is because the breather device communicates the interior space with the outside air and maintains the interior space at all times in an atmosphere balanced with the outside air. The communication effect of the breather completely prevents the intrusion of fine dust and feng shui from the outside world, and has the function of reliably achieving only ventilation. Without this, long life cannot be guaranteed.

Finally, the wind-power converter which uses a storage battery as a main power source, which is a feature of the present invention, is entirely housed in a sealed storage box on the board. The electrical components that make up the generator, storage battery, and control circuit can be inspected through openable airtight lids installed at several locations for maintenance and management purposes. In order to increase the useful life of the power source and storage battery, and to reduce their size, structural requirements are required that allow both to operate at maximum efficiency at all times.

That is, in a generator, an electrical control circuit is constructed so that the output voltage value always becomes the rated voltage.

Therefore, when the output voltage value exceeds the predetermined rated voltage value, the electric control circuit is activated via the computer and a pitch-variable electric control signal is sent to the servo motor, and the pitch angle of the windmill's blades is determined by the voltage. The angle is controlled until the difference becomes zero. All control operations during this time are performed using a loop feedback control method. The generator is an alternating current generator that does not use a commutator to reduce the failure rate.

The storage battery uses a floating charging method using constant current charging.

According to the electrical control method according to the present invention, wind speeds that are lower than the standard wind speed for use are basically truncated and not used. In addition, the wind speed is higher than the preset usage standard wind speed (
(including typhoons), the blade inclination angle θ is set to zero to allow the wind to pass through the wind turbine, ensuring strong safety and maintenance of the wind turbine. The basic idea is to completely discard winds outside the wind speed range where the tsumashi is used. Such a concept has not been found in conventional wind power generation devices, and is a feature of the device of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

Embodiment FIG. 1 shows a side view of the entire wind power generator according to the present invention, and FIG. 2 shows a front view of the wind turbine from the front. In the figure, 1 is a board anchored on a foundation concrete block on the ground, and 2 is a support pipe 2 ap that has three upper, middle, and lower support pipes on the board 1.
2B and 2C are connected one after another to show a support portion of a wind turbine device built upright on a substrate 1. A generator storage box 8 and a storage battery storage box 9 are attached to opposite wall surfaces of the lower side wall of the lower support pipe 2a. A wind turbine body 4 is mounted on the upper end of the strut 2 so as to be able to rotate around the vertical center line of the strut, and a blade wheel 50 is mounted on the tail of the fuselage 4 to be rotated by nine vertical rudders 6. is provided so as to automatically turn to face the wind direction W. Reference numeral 7 denotes a hood that surrounds the outer periphery of the 50 blades of the impeller, and is attached to increase the speed of the wind introduced into the hood and to extract the impeller from the outside world.This special hood is one of the important components of the present invention. It has become.

FIG. 3 shows an enlarged view of the connection structure between the respective strut pipes constituting the strut portion 2, and FIG. 4 is a horizontal sectional view taken along the line IV--■ in FIG. 3. These drawings omit the vertical transmission shaft penetrating the interior of the support pipe, the conductive cable pipe inserted within the support pipe, the storage box attached to the lower support pipe wall soil, and the like. In FIG. 3, reference numeral 11 denotes a foundation concrete block buried underground, and a rectangular anchoring board 12 is integrally attached to the upper surface of this block with anchor bolts. The flange 13a of the lower support tube can be fixed with nuts through bolt insertion holes through a large number of stud bolts provided on the base plate 12.

Connecting flanges 13 are pre-installed at the upper and lower ends of each strut pipe.
, 13' are fixed by welding, and in particular, a plurality of reinforcing lips 14 are attached to welding means at the corners of the upper surface of the lower end flange 13 attached to each strut tube. Further, a fitting sleeve (spigot) 15 is formed of a melt layer on the lower surface of the lower end flange 13 to facilitate consistent assembly of the strut tubes. In order to reduce weight and construction costs, the present invention uses commercially available standard steel pipes for constructing the struts. For example, the lower strut pipe 2
A 3 m long STK standard pipe is used for a, and a rectangular base flange 13a is attached to the lower end of the pipe so that it is firmly fixed to the anchoring board 12 by tightening bolts. Reference numeral 1 designates the fixed parts on the basic block as a base plate.

An arbitrary number (four in the figure) of hooks 16 for suspending the strut tubes are provided on the upper outer circumferential surface of each strut tube and are used for assembly and transportation. Several opening/closing lids 17 are formed on the peripheral wall of the lower support pipe 2a for internal inspection and maintenance. The diameter of the intermediate strut pipe 2b bolted to the upper part of the lower strut pipe 2a is smaller than the diameter of the strut pipe in part for strength reasons.
The diameter of the upper strut tube 2c bolted to the top of the column is smaller than the diameter of the middle strut tube. Standard pipe materials having a length of, for example, 6 m are used for the middle and upper support pipes, but depending on the installation height of the wind turbine, the middle support pipe 2b is constructed using standard pipes having the same length. All of these individual strut tubes are prepared for processing using a factory production method, and are designed to be constructed by on-site assembly using a helicopter or the like. FIG. 5 shows an external view of the wind turbine rotatably mounted on the upper end of the support column 2. In particular, only the hood that surrounds the rotor wheel 5 and is fixed on the body 4 is along the rotation center line. It is shown in cross section. Figure 6 shows the cross section of the blade attached to the impeller 5.
This drawing shows the shape of a fan-type blade having a wide blade area that covers the air, and is specially drawn with a blade inclination angle θ=90°. As mentioned above, the hood of the present invention not only protects the impeller from the outside, but also has a cross-sectional shape designed as a contracted flow duct that increases the available wind speed in order to fully utilize the wind power in the available wind speed range. In other words, the cross section of the hood 7 is formed into a bellmouth shape that gradually decreases from the inlet to the plane of the rotation center of the impeller. The standard design of the present invention has a blade outer diameter of 2 m, a hood inlet diameter of 2.6 m,
If the outer diameter of the impeller boss is 0.4 m, the wind speed v8 at the minimum diameter cross section of the hood is Ve compared to the inlet wind speed V.
It is known that the conversion efficiency of wind energy increases in proportion to the cube of the wind speed V. It is now possible to design a wind turbine in a relatively low speed range, and with the combined use of a fan-type impeller, it is possible to realize a wind turbine device with a low failure rate and high wind power conversion efficiency.

A heat sheet 22 using electric heat is stretched around the inner wall surface of the reduced diameter part of the hood 7 to prevent rainwater and snow from freezing inside the hood in cold weather. The heating power can be supplied at approximately 6 volts from the storage pond. In addition, wire meshes 23 and 23' are stretched over the front and rear surfaces of the hood 7 to prevent intrusion caused by flying pieces of wood, dead leaves, etc. or the creation of nests by small birds.
We are trying to prevent damage caused by The hood 7 is made of a sheet metal material with a thickness of 5 mm, and can be bent by a press into a cylindrical body having a desired cross-sectional shape as shown. A support structure is provided at the rear of the hood to secure it onto the wind turbine body. This support structure is formed on the front side of the wind turbine body 4 by a pair of half-sleeves 25a and 25b that surround the entire outer circumference of the body and can be tightened. Tightening and fixing are done by both flanges 25', 25' formed on the joint surfaces along the longitudinal direction of the half-split sleeves 25a, 25b.
can be joined and fixed with bolts and nuts.

A total of eight support plates 24, four each extending in the radial direction from the half-split sleeves 25a and 25b, are extended toward the inner circumferential wall surface of the hood, and are connected to the inner wall surface of the hood by angle members 26. .

A wind direction vertical rudder 6 is fixedly erected at the rear of the fuselage 4, and an eye bolt 28 for hanging is attached to the upper center of the fuselage 4. Further, a breather 31 and a grease plug 32 are attached to the lower part of the fuselage. 33 is a lid for internal inspection that can be opened and closed.

A rotary spinner 30 is covered at the tip of the wind turbine body 4 and covers the front end of the boss portion of the rotary blade wheel 5, and is shaped into a streamlined shape to reduce the resistance of incoming air. A fixed spinner 29 for covering the ends shapes the fuselage tail shape.

Figure 6 is a front view of the four blades that make up the impeller 5, viewed from the front where the wind flows in, and the blade inclination angle θ = 90.
It is shown in °. Actually, this condition does not exist because the highest efficiency is achieved when θ=45°. However, this shape is the best in order to reduce manufacturing costs.

As shown in Fig. 6, the blade plane of a blade wheel having n blades, for example, 4 blades, is formed as a fan-type blade with wide blades that cover almost the entire cross section of the flow, and most of the incoming air is applied to this blade. This makes it possible to convert the maximum rotational torque. The outer diameter of the blades is 2m, making it much smaller than conventional wind turbines that are 4m or more. In FIG. 6, the gap between the sides of the blades and the shortest gap between the inner circumferential surface of the hood and the periphery of the tip of the blade are approximately 2 to 3 sub-spaces. Each of the blades is firmly held on the blade shaft via a blade shaft which is pivotally attached to the boss portion at the center of the impeller, and each blade itself is designed to be detachable and replaceable. FIG. 7 shows the internal structure of the wind turbine body 4. In the same figure, the hood 7 is omitted and is rotatably supported by a rolling bearing device 41. A rotating seat frame 45 constituting the rotating sliding portion of the fuselage 4 is attached to the lower surface of the center of the fuselage so that its center line aligns with the vertical center line of the strut tube. Multiple O's are installed to ensure the sealing effect of the fuselage rotating section.
- A ring seal 43 and a double seal 44 are formed between the pivoting sliding surfaces. In addition, in order to apply grease lubrication to the roller 9 bearing 41, the upper support pipe 2
The annular space above the bearing support ring 47 welded to the upper part of c forms a filled grease chamber 48, and these filled greases can be pumped from below through the grease filling pipe 42 using an associated pressure pump. Reference numeral 46 is a razor cup that prevents the filled grease from escaping and is attached to the pivoting seat frame 45 that pivots. A thrust roller υ bearing 49 is installed inside the center opening of the seat frame 45, and is formed as an upper end bearing portion of a vertical transmission shaft 100 passing through the center opening.

Next, the rotation main shaft 50 of the blade wheel formed inside the wind turbine body 4
In addition, the variable beam disposed inside the rotating main shaft is firmly fixed to the rear side of the boss body 51 of the impeller 5 with bolts. The main shaft 50 is rotatably inserted into the body. Further, a bevel gear 65 is fixed to the outside of the rotating main shaft 50, and this bevel gear 6
5 is a vertical transmission shaft lOO provided through the inside of the strut pipe 2.
A support bulkhead 67 is provided at a distance slightly rearward from the upper end and is integrally connected to the inner wall of the fuselage by bolting.

A so-called variable pitch control system for controlling the blade inclination angle uses this partition wall 67 as a main support. That is, an annular bracket 54 is formed behind the support bulkhead 67, and the housing of the high reduction gear device 56 is coupled to the back of the bracket 54, and the servo motor 57 is further connected, so that these brackets are cantilevered. It is supported on the support partition wall 67 in a shape. The controlled rotation of the servo motor 57 is extracted to a low speed rotation output shaft 58 of the high reduction gear device DA 6, and is connected to a control output shaft 60 via a sleeve joint 59. The control output shaft 60 passing through the central opening of the partition wall 67 is supported by a thrust ball bearing 63. Furthermore, a pitch control angle sensor 62 is provided on the support bulkhead 67, and the sensor 62 senses when the blade inclination angle θ of the impeller is changed to 0 degrees, transmits it to the servo motor side, and generates electricity. It constitutes a safety protection means that interrupts the control circuit. The control rotation angle drawn from the servo motor to the control output shaft 60 has a bulk of 32.6 in one embodiment.
The angle range is °. Therefore, the fixed sensor 6
2 to joint 59. The sensor pins 61 planted on the flange surface are normally spaced at an angular interval of 32.6°.

The sensor bin 61 approaches the sensor 62 with the blade angle θ=0, and at the blade angle θ=0 a signal is generated to interrupt the electrical control circuit and the blade wheel enters the feathering state. On the front side of the support F443 wall 67,
By incorporating the inclined planetary bevel gear mechanism 70 inside the rotating main shaft 50, a closed-circuit gear mesh transmission system that enables synchronous rotation action and variable pitch control action is achieved.4Sq@b)
.

The planetary bevel gear mechanism 70 includes a plurality of inclined planetary bevel gears 73.
, and a small bevel gear 74 and a large bevel gear 75 that mesh with this. In this case, the inclined planetary bevel gear 73 is rotatably mounted on a plurality of pivot pins 72 provided on a carrier 71 formed at the front end of the control output shaft 60 on the servo motor 57 side. Further, a small bevel gear 74 disposed on the rear side of the planetary bevel gear 73 is formed on the same gear shaft integrally with the spur gear 76, and both trunks of this double-headed gear are mounted on a pin support shaft 78 with a ball bearing 80. It meshes with an intermediate gear 77, and is also interlocked with an internal gear 79 fixed to the inner wall of the rear end of the hollow rotating main shaft 50. A large bevel gear 75 positioned on the front side and meshed with the planetary bevel gear 73 is integrally fixed to the rear end of the variable pitch drive shaft 80. The variable pitch drive shaft 80 is integral with the rotation main shaft 50 and constantly rotates around the rotation center line during the rotation of the wind turbine, and when simultaneously receiving a rotation control action from the servo motor 57, this control rotation angle is changed. It has the role of transmitting the amount of energy to the blade shaft of the impeller. That is, the variable pitch drive shaft 80 must be configured to rotate together with the rotating main shaft 50 and to perform separate controlled rotations during this rotation. This is achieved by employing a tilting planetary bevel gear mechanism. Therefore, the variable pitch drive shaft 80
A front ball bearing 81 and a rear ball bearing 82 are mounted on the front and rear sides of the rotary main shaft 50 so as to face the inner wall surface thereof, allowing the variable pitch drive shaft 80 to rotate freely and smoothly. The ball bearing 83 is installed inside the rear end of the variable pitch drive shaft 80, and constitutes a support portion that rotatably holds the distal end portion of the carrier 71 on the central axis. In consideration of the influence of expansion and contraction due to temperature changes on the relatively long rotating main shaft 50, the above-mentioned
By attaching biasing springs 84 and 85 to each bearing outer ring of the pair of rollers at the rear of the pair of rollers, that is, the outer ridge ball bearing 66 and the inner rear ball bearing 82, the expansion and contraction of the shaft can be achieved. It can be compensated automatically. In other words, the outer rings of each bearing in the loosely fitted state are always subjected to the pressing force of the springs 84 and 85, so even if the rotating main shaft 50 expands or contracts, the steel balls on the υ bearings will not move between the inner rings and the inner rings that form the pair. This is because the outer ring can be held movably while receiving a substantially constant axial pressing force between the outer rings, and can rotate smoothly. The special arrangement of this structure is such that a bevel gear 89 is installed to prevent premature fatigue failure of the shaft and ball bearings due to repeated thermal stress generated on the main shaft due to temperature changes during day and night. meshes with a composite bevel gear 90 fixed to the lower end of the hollow vane shaft 100. The composite bevel gear 90 has two bevel gears 9.
This is a known back gap prevention bevel gear in which 0a and 90b are polymerized and connected by a spring. The blade wheel 5 is attached such that a blade shaft 100 constituting the root portion is rotatably inserted into a blade support shaft cylinder 101. A plurality of blade support shaft cylinders 101 are formed around the boss framework 51 so as to protrude radially in a number corresponding to the number of blades.

On the rear side surface 104 of the boss framework 51 is the rotational main shaft 50 described above.
The front end of the main shaft is fixedly fixed with bolts and integrated, and the main shaft is rotatably supported on the inner surface of the wind turbine body 4 via a tapered roller bearing 52. An oil seal 106 and a labyrinth 107 are provided between the rotating boss section and the stationary body 4 in order to ensure a sealing effect between the rotating boss section and the stationary body 4 in this relative rotating section.

This sealing part is an annular sealing cover 10 fixed on the body 4.
At the same time, the shield part of the oil seal installed in 5 is brought into sliding contact with the sliding contact ring (quenched and polished) 108 installed on the boss side, and at the same time, the 2-billinth seal part 107 is placed side by side inside the ring 108 to make this part. This ensures a sealing effect against the outside.

A closing plate 110 for sealing the internal space of the boss is fixed to the front surface of the boss framework 51 with bolts, and the outer periphery of a ring-shaped flange bent and formed around the periphery of the closing plate is formed into a flowing rock shape by drawing. A formed front spinner 30 is fixed. A fixing seat frame 113 for fixing a ball screw persimmon 121 is integrated into the closing plate 110 at its inner center. The threaded rod fixing seat frame 113 has threaded rod mounting seats 114 corresponding to the number of threaded rods, and the axis of the ball screw rod 1.21 is correctly aligned with the blade axis and the threaded rods are fixed on the mounting seats. There is. 112 is a grease filling plug for filling the inside of the boss with grease.

As described above, the composite bevel gear 90 is fixed to the inner lower end of the hollow blade shaft 100 and meshes with the drive bevel gear 89 fixed to the front end of the variable pitch drive shaft 90 to control the blade surface inclination angle. It is. In the present invention, the ball screw mechanism 120 is built into the hollow interior of the blade shaft to counteract the significant radial thrust applied to the blade shaft during rotation of the impeller 5, thereby avoiding early failure that is likely to occur in the blade shaft. ing. Needless to say, the blade shaft in the variable pitch control system requires a large torque force to rotate the blade shaft itself against the action of the inflowing wind force. Furthermore, it is subjected to a radial component of the incoming air and a rotational centrifugal force acting on the total weight of the blade. According to the ball screw mechanism 1120, the outward thrust acting on the blade shaft is stopped by a large number of steel balls lubricated with grease, and
Moreover, it has already been demonstrated that it has the advantage of reducing the rotational torque required for the blade shaft. Therefore, this has the effect of eliminating the failure that conventionally tends to occur in the blade shaft portion, and significantly extending the useful life of the wind turbine. Ball screw mechanism 12
0 is a known ball screw mechanism consisting of a large number of steel balls that are engaged with a ball screw rod 121 and circulate, and a fitting nut that forms this circulation path, and the thread pitch of the ball screw rod 121 is usually given a slight pitch angle. has been done. For example, in this embodiment, when the effective diameter of the screw is 59 m and the screw pitch is 5 am, the inclination angle α of the screw is calculated as follows. This small inclination angle α is sufficient for the large number of steel balls to absorb the large thrust acting on the blade shaft without failure, and at the same time, since it is a rolling contact, the rotational torque required for the angle changing action is small, and the servo motor This has the effect of reducing the capacity of the device. However, due to the nature of the ball screw mechanism, the vane shaft 100 fitted into the fixed ball screw rod 121 moves radially outward at the same time as its rotation, albeit very slightly, and as a result, the compound bevel gear 9
A slight back gap is created between the meshing surfaces of the gear 0 and the drive bevel gear 90. For example, if the thread pitch of the ball screw rod 121 is 5II11, the angle range in which the blade shaft is actually controlled is approximately 60'.
If the angle is ~0°, the amount of movement of the blade shaft 100 relative to the threaded rod 121 is 60°, which is a maximum of 5°. , about 0.8 of a cow. By employing a composite bevel gear 90 for preventing back gaps, the meshing action without any back gaps can be changed.

A seal packing 102 is provided around the outer end surface of the support shaft cylindrical portion 101 of the boss framework into which the blade shaft 100 is inserted. Individual blades with a wide blade surface are connected to a blade support tube 12.
3 by the connection of the retaining arm 124. The blade support tube 123 is inserted into the hollow hole of the hollow blade shaft 100, and is removably fixed to the flange 103 formed at the upper end of the blade shaft by fastening bolts. Blade support shaft 12
A cup-shaped closing member 122 is press-fitted into the lower end of the blade shaft 10 to form a grease filling chamber for the ball screw mechanism.
It is formed inside the lower side of 0.

A removable mounting structure for the blades 130 of the impeller 5 and the blade support shaft 123 will be described with reference to FIG. 5.

The blade support shaft 123 along the radial centerline of the blade 1300
Support metals 127 for holding the blade are attached at two locations on the inside and outside of the blade surface. Furthermore, the arm tip of the holding arm 124 welded to the inner end of the blade support shaft 123 is connected to the nut 1 via the curved connecting rod 125.
It is connected and fixed to the blade 130 by 26. Furthermore, the screw is screwed into the external threaded part turned around the outer periphery of the end of the blade support shaft 123 according to the tightening screw (12.1), and is brought into contact with the support metal 127 to push the blade body against the flange 124 on the blade support shaft 123. Firmly tightened In this way, the individual blades 130 are firmly attached. The blade support shaft 123 can be disassembled and replaced by releasing the bolted portion on the mounting flange 103 formed at the upper end of the hollow blade shaft 100. In terms of design, it is preferable that the wind speed band for wind turbines is 3 m/8 to 6 m/s, and the rotational speed of the impeller at this time is 100 to 20 Or, p, m.

Furthermore, inside the wind turbine body 4, the above-mentioned servo motor 57 is installed.
A conductive cable is housed to connect the board and the electrical equipment arranged on the board. In the present invention, for these conductive cables, a structure is adopted in which the interior cables of the fuselage interior and the interior cables below the strut pipe are housed separately, and a slip ring mechanism is adopted to prevent twisting of the cables due to the rotational movement of the fuselage. There is. First, the electric cable 140 led to the servo motor 57 is held through a cable through hole formed in a connecting ring 142 that constitutes the peripheral wall attachment portion of the support bulkhead 670 of the fuselage 4, and is held within the center of the fuselage 4 on the rotation center line of the fuselage 4. It is held by surrounding half of the circumference of an annular cable support ring 144 fixed to the wall surface. Further, the lower connector 145 of the support ring 144 is a connecting part of a conductive cable receptacle provided to separate the body 4 from the support pipe 2 and transport it, or to facilitate disassembly and assembly thereof, and connects the upper and lower parts. The individual wires drawn out from the conductive cable can be interconnected or separated in this section.

146 is a connecting sleeve 146 which has a built-in connector 145 and holds the lower conductive cable 150 fixedly;
The bevel gear 10 is inserted into the picture frame of No. 01 with a slight gap, and the bevel gear 10
1 can freely rotate relative to the sleeve 146. Reference numeral 151 denotes an upper coil-wound portion of the upper conductive cable 150, which is formed as a surplus portion for cable wiring work.

FIG. 8 shows an enlarged view of each structural part arranged inside the column tube on the substrate. The aforementioned electrically conductive cable hangs downward from above, and a lower coiled portion 152 is also formed above the lower electrically conductive cable designated as 153. A slip ring device 160 is provided at the lower end of the lower conductive cable 153. The purpose of the slip ring device is to prevent fatigue breakage due to twisting of the conductive cable that extends from the center of the body through the inside of the support tube and hangs down during the rotational movement of the wind turbine body 4.

A jacket sleeve 161 is added to the lower side of the lower conductive cable 153, and a slip ring retaining ring 162 made of an insulating material is coupled to the lower end of the sleeve 161.
Four spaced apart slip rings 163 are mounted on top. In this case, the hook slip ring is connected to individual wires led out from the lower conductive cable 153. Further, since two ball bearings 167 and 167 are attached to the , the conductive cable 153 can be rotated very easily around the vertical center line of the fixed guide tube 166. A twisting effect on the conductor cable, which is subjected to a pivoting action together with the fuselage 4, is therefore avoided by this slip ring am 160. Note that 164 indicates a plush holder that slides into contact with the slip ring.

A horizontal bevel gear 170 is fixed to the lower end of the vertical transmission shaft 100,
The bevel gear 170 is rotatably supported by a thrust ball bearing 173 provided in the guide housing 168 in alignment with the center line of the vertical transmission shaft. A speed increaser underframe 188 is fixed inside the central opening of the base flange 13a welded to the lower end of the lower support pipe 2&, and the speed increaser 180 is firmly mounted on the underframe 18B. An input bevel gear 171 that meshes with the horizontal bevel gear 170 is fixed on the input shaft 181 of the speed increaser. The pair of bevel gears 170 and 171 described above rotate in a grease container 174 filled with grease.

175 is a grease injection pipe. A generator 190 placed on the left side of the speed increaser 180 is held and fixed in a cantilever manner on a seat plate 184 that is aligned and fixed to an opening bored in the peripheral wall of the lower support pipe 2a, using a flexible joint 183. The generator is connected to the speed increaser. Conductive cable 155 shows the cable that originates. Reference numeral 185 is a sealed box surrounding the generator, which is bolted to the support pipe wall, but it is preferable to provide an opening window with a lid that can be inspected and opened separately.

The speed increaser 180 is used to increase the rotational speed of the impeller as much as possible to increase power generation efficiency, and its speed increase ratio is, for example, 9:1. The rotation speed of the impeller is 100 r, p, m
In the design example, the generator rotation speed is 1600 to 3.20 Or, p, m.
It can be operated at the rated rotation speed. The table below shows the speed increase ratio and allocated speed increase speed in the intermediate speed increase stage from the impeller to the generator designed under the above conditions.

The blank space in FIG. 9 below shows a skeleton diagram of the closed-circuit gear meshing system built into the wind turbine body 4 described above. The principles of the synchronous rotation mechanism and variable pitch control mechanism of the present invention will be explained below with reference to this drawing.

As is clear from FIG. 9, the closed circuit gear meshing system is formed by the following gear meshing chain, namely, the rotating main shaft 50→
Internal gear 79 → intermediate gear 77 → center gear 76 → inclined planetary bevel gear mechanism 70 (small bevel gear 74 → planetary bevel gear 73 → large bevel gear 75) → variable pitch drive shaft 80 → drive bevel gear 89
→ Composite bevel gear 90 → Rotating main shaft 50, forming a meshing loop.

When the control output shaft 60 whose rotation is controlled by the servo motor is in a stationary state without variable pitch control, that is, the carrier' of the planetary bevel gear mechanism 70? + is stationary, in order for the impeller 5 to be freely rotatable, the rotation main shaft 50
It is essential that the variable pitch IiX moving shaft 80 rotates in the same direction and at the same rotation speed as the rotational center axis of the wind turbine, that is, they rotate as one unit.

Therefore, under the condition that the rotational main shaft 50 is used as a rotational drive source and the carrier 71 is fixed, the rotational main shaft 50 is set to the central axis X.
- When the variable pitch drive shaft 80 makes N rotations around X, the rotation of the variable pitch drive shaft 80 that is pulled out from the planetary bevel gear mechanism 70 from the internal gear 79 via the intermediate gear 77 and the center gear 76 is also in the same rotational direction and N rotations. It is necessary to determine the ratio of the number of teeth between each meshing gear.

For example, when the number of revolutions per minute of the rotating main shaft 50 is N, the middle 2 is calculated as the number of teeth of the code number gear), and further becomes the large bevel gear 75 in the planetary bevel gear mechanism 70. Therefore, if the variable pitch drive shaft 80 rotates per minute, the number of revolutions per minute of the variable pitch drive shaft 80 is N, and the rotation direction is also the same.

This is the principle of the synchronous rotation mechanism in the present invention. In this case, the control output shaft 60 is controlled to rotate from the servo motor 57 through the high reduction gear device 56 at a large reduction ratio, e.g. Rotational action is prevented and the control output shaft 60 is held in a self-locking state during rotation of the impeller.

Next, the blade inclination angle control mechanism of the impeller 5 will be explained with reference to FIG. 9 as well. In this case, the control output shaft 60 becomes the rotational drive source, and the variable pitch drive shaft 80 can be considered to be subject to controlled rotation under fixed conditions in the chain gear portion from the rotational main shaft 50 to the small bevel gear 74. . According to the previous example, the ratio of the number of teeth between the large and small bevel gears 75 and 74 in the planetary bevel gear mechanism is fixed, and when the carrier 71 rotates once, the large bevel gear 75 moves in the opposite direction, that is, the drive bevel gear 89 disposed inside the boss 51. Assuming that the number of teeth of the composite bevel gear 90 that meshes with these is 68 and 37, the composite bevel gear 90 rotates at a rate of 2.76 rotations of the blade shaft 100 for one rotation of the pitch control output shaft 60. It will undergo controlled rotation. However, since the pitch inclination angle θ of the hollow blade shaft 100 is actually within 60', it is operated within #22°.

The above is the principle that enables the pitch control of the present invention.

FIG. 10 shows an embodiment of the electrical control circuit in the wind power generator of the present invention. This example shows a control method aimed at unmanned operation of wind power generation equipment, and is particularly shown for use in small wind power generation equipment as a power supply source for signal lights for remote areas and steel towers. The generator G shown in the figure is an alternating current generator without a commutator, which has higher reliability than a direct current generator in terms of maintenance and management, and is advantageous for unmanned operation. DR is a diode rectifier, which is inserted into the charging circuit entrance to storage battery B, and when the generator output voltage is below the rated voltage, DR is not energized and cannot be charged. In order to increase the useful life of the storage battery B, the storage battery is charged by a floating charging method so as to maintain a 100% charging rate at all times. CT is a current transformer installed in the output circuit of the generator G, this output current is drawn out by the bridge rectifier CR, and the voltage value corresponding to the bridge rectifier CR is
and a voltage value of a reference voltage circuit consisting of a resistor R.

The differential voltage value is amplified by an amplifier A and sent to the servo motor SM for variable pitch control. As long as the control signal corresponding to the above voltage difference is generated, that is, as long as the output voltage value of the generator is equal to or higher than the rated voltage value, the control action of the blade pitch inclination angle of the blade wheel 5 by the servo motor SM continues. The inclination angle θ gradually decreases, and when the output voltage of the generator G becomes equal to the reference voltage value (rated voltage) and the differential voltage value becomes zero, the control action of the servo motor stops and the blade inclination angle of the impeller increases to θ. Balanced rotation is achieved by the angle of inclination of the blades.

If the wind speed is high and the rotational speed of the generator G, and therefore the output voltage, cannot be controlled to be reduced to the rated value, the blade inclination angle θ becomes zero and the sensor 62 is activated, cutting off the entire electrical circuit system and the blade wheel. It is in a feathering state and there is no wind energy conversion effect. However, the 7 ether ringing state of this impeller is limited to the set standard wind speed band, for example, 3 to 6 m/8 or more, and when the wind speed is below the above wind speed band, the generator output voltage becomes below the rated value and the diode rectifier DR is energized. No charging action takes place. That is, in the present invention, all wind speeds other than the set standard wind speed are ignored, and the wind energy conversion action is basically used only in the set wind speed range where highly efficient operation can be guaranteed. ing. Since the charging method of the present invention is performed with the rotational speed of the generator G, and thus the output voltage, being substantially constant, constant current charging control is effective, which means that the charging time is shortened. Normally, in order to improve the lifespan of a storage battery, a 100% charging rate is ideal, and overcharging reduces the lifespan. In order to avoid this overcharging effect, a discharge power measuring device P is inserted in series with the storage battery B in the electric circuit,
When charging, the amount of electricity already consumed in the load is counted by the measuring device P, and the charging action is continued until this counted value becomes zero, and when the charging rate reaches 100%, the charging action is stopped. Stop. At this time, the measuring device P is the relay R
It is necessary to open Y to lower the voltage of resistor R that is balanced with the voltage of current transformer CT, and to lower the generator current to a value that covers only the self-discharge of the storage battery. Therefore, it is necessary to provide the measuring device P with a means to stop the integration when the discharge amount is below a certain level.

In addition, the electrical relay RY in Fig. 10 is of a non-contact type, and the servo motor SM is controlled on and off using a general-purpose induction motor equipped with a mechanical control device (non-contact method).
In any case, the variable pitch control action of the impeller blades according to the present invention maintains the generator rotational speed and therefore the output voltage at a substantially constant standard voltage value, and in the standard wind speed range 3 to 6. The highest wind turbine efficiency is maintained in Bear 4. In addition, a floating charging method is adopted for the storage battery, which avoids overcharging and replenishes only the load consumed power to ensure a 100% charging rate. Thus, in order to improve the service life of equipment, the present invention is based on a design that limits the application purpose and has a smaller capacity and weather resistance that is advantageous in terms of strength for each component.

Effects of the Invention Although one embodiment has been described above, the features of the apparatus of the present invention can be summarized as follows.

Commercially available STK steel pipes will be used to a large extent, individual assembly parts will be prepared for factory production as much as possible, and structures will be assembled on-site. This is to reduce the weight of the pillars, which account for most of the total weight, to make them easier to transport and to reduce construction costs. In addition, since equipment such as impellers, servo motors, generators, and storage batteries are required to operate under highly efficient operating conditions, their capacity can be reduced and their service life can be increased. Furthermore, each component is designed to ensure durability and safe maintenance, making it ideal as a no-cost facility. Furthermore, since it is designed to deal with all kinds of damage from wind, flood, and snow from a macro and micro perspective, a long lifespan is guaranteed. This is a feature not found in conventional wind turbine equipment. This was designed to be suitable for areas with heavy snowfall, such as remote areas in the mountains and the summit of Mt. Fuji.

For this reason, all equipment is housed in a sealed storage box, and all moving parts are sealed with oil seals or labyrinths to ensure dustproof and waterproof measures. Additionally, each part uses a grease lubrication method that simplifies maintenance and management.

A breather is provided on the wind turbine body and strut pipe to take care of balancing the internal atmosphere due to changes in internal and external temperatures, and means to compensate for expansion and contraction caused by changes in temperature of the rotating main shaft. is taken into consideration. This is extremely effective in preventing early fatigue failure of the spindle due to repeated thermal stress. The hood installed around the blade wheel functions as a duct for generating dynamic pressure of wind speed.
It is possible to convert wind power within the wind speed range into energy to the maximum extent possible. Furthermore, the hood also serves as a protective shield against external projectiles.

All moving parts are with rolling bearing design.

A fan-type impeller consisting of several bales with a large blade area is used for the impeller, and the wind speed energy flowing into the hood is absorbed into the blade surface to the maximum extent, thereby increasing the operating efficiency of the impeller. The outer diameter of the blade wheel is 2 meters as standard, and compared to conventional propeller wind turbines of 4 meters or more, it is extremely small, making it compact and having a low failure rate. Furthermore, the generator uses an automatic variable pitch control system to ensure the rated rotation speed, and the storage battery, which is the main power source, uses a floating charging system to constantly charge the generator with maximum wind power generation efficiency. , consideration has been given to increasing the battery life. Note that above the standard wind speed, the blade pitch inclination angle becomes zero, resulting in a shifted state. Of course, this is to take safety measures against strong winds and gusts.

[Brief explanation of drawings]

Figure 1 is an external side view of the entire wind turbine generator of the present invention, Figure 2 is a front view of the wind turbine in Figure 1 seen from the front, and Figure 3 is an enlarged view showing the assembly structure of the strut tubes shown in Figure 1. 4 is a sectional plan view taken along the line ■-■ in FIG. 3, and FIG. 5 is an enlarged side view of the upper part of the strut tube including the wind turbine body of the device of the present invention, especially the hood part of the blade wheel. is shown in cross section. FIG. 6 shows the impeller surface of FIG. 5, FIG. 8 is an enlarged vertical cross-sectional view showing the generator drive system provided at the lower part of the strut tube in relation to FIG. 7, and FIG. FIG. 10, which is a diagram explaining the principle of the pitch control mechanism, shows an embodiment of the electrical control circuit of the present invention. ■... Board, 2... Support pipe section, 4... Wind turbine body,
5... impeller, 6... vertical wind rudder, 7... hood,
8... Generator storage box, 9... Storage battery storage box, 50.
...Rotating main shaft, 56...High reduction bevel gear device, 57...
・Servo motor, 70... Inclined planetary bevel gear mechanism, 1
0o... Vertical transmission shaft, 180... Speed increaser, 190.
...N, Iso. Procedural amendment (method) March 9, 1980 Kazuo Wakasugi, Commissioner of the Patent Office1, Indication of case: 1982 Patent Application No. 2267752, Title of invention: Weather-resistant small wind power generator 3, Make amendments Relationship with the case Patent applicant name: Yamaguchi Machinery Research Institute 4, agent address: Shizuka Toranomon Building, 8-10 Toranomon-chome, Minato-ku, Tokyo 105 Phone: 504-07215 Date of amendment order: February 1982 April 28th (shipment date) Confirmation ＼ 6. Column 7 of "Brief explanation of drawings" of the specification subject to amendment, page 49, line 7 of the statement of contents of the amendment, "Front view," and "No. ” and the following words are inserted and amended. "Figure 7 is a block diagram showing the arrangement and connection relationship among Figure 7 A, Figure 7 B, and Figure 7 C." (2)

Claims (1)

[Scope of Claims] 1. In a wind power generation facility equipped with a horizontal shaft type wind turbine in which the wind turbine body is rotated on the vertical center line of an upright support pipe, a wide fan type is installed on the front side of the wind turbine body (4). A rotary blade wheel (5) having blades is exposed and supported, a hood (7) is fixedly installed on the body to surround the outer periphery of the blade wheel, and the blade wheel is mounted inside the body by a servo motor (57). An automatic variable pitch control mechanism for controlling the pitch inclination angle of the blades is incorporated, and the rotational main shaft (50) of the impeller (5) is housed and disposed at the bottom of the strut tube via a vertical transmission shaft (100) disposed within the strut tube. The servo motor (5) is connected to the generator (190) so that the rotation of the impeller can be transmitted to the generator input shaft.
7) By forming an electrical control circuit that can transmit the blade pitch angle control signal of the impeller, it is possible to control the difference between the output voltage of the generator and the reference voltage in a predetermined usage range. The system is characterized by transmitting a corresponding electric signal to the servo motor to control the pitch angle of the impeller blades from the reference angle θ to zero degrees, keeping the generator in the rated operating state at all times, and floatingly charging the storage battery. A weather-resistant small wind power generator. 2. In the device according to claim 1, the variable pitch control mechanism for the blade angle of the blade wheel built into the wind turbine body (4) includes a hollow rotating main shaft (50) integral with the blade wheel (5). A small bevel gear (74) is connected through a gear chain to an internal gear (49) fixed to the inner wall of the servo motor (57). Inclined planetary bevel gear (4) pivotally mounted on carrier (71)
4) and a large bevel gear (
75) and a tilted planetary bevel gear mechanism (75).
0) A weather-resistant small wind power generation device characterized by being formed by. 3. In the device according to claim 2, the hollow rotating support shaft (50) has two pairs of rollers disposed on its outer and inner surfaces as υ bearings (52, 81; 66, 82).
The inner wall of the wind turbine body (4) and the variable pitch drive shaft (8
0), and the rear roller of the rotating main shaft (50) is provided so that each bearing outer ring of the bearing pair (66, 82) is movable under spring bias. A weather-resistant small wind power generation device characterized in that this allows the expansion and contraction of the rotating main shaft due to temperature changes and avoids fatigue failure due to repeated occurrence of thermal stress. 4. The device according to claim 1, wherein an output voltage detection circuit consisting of a current transformer (CT) and a bridge rectifier (CR) is formed in the electrical output circuit of the generator (190), and the circuit A diode rectifier DR and a reference voltage generation circuit (
When the output voltage of the generator is below the rated value, the charging circuit is disconnected to prevent the wind power conversion action, and when the output voltage is higher than the rated value, the voltage is different from the reference voltage. An electrical control signal corresponding to the difference is sent to the torque motor to automatically change the blade angle of the impeller blade and start the engine. A weather-resistant small wind power generation device characterized by being designed to