JP2006349122A - Centrifugal brake and clutch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device capable of reliably operating a brake and a clutch as measures against the strong wind at low cost in a small-sized wind power generator. <P>SOLUTION: In the centrifugal brake and the clutch, a main rotation shaft A transmitting rotation and a shaft B driven and rotated by receiving the rotational force are provided, a non-slip round washer having is fixed on the end thereof, and the main rotational force is easily transmitted from the shaft A to the shaft B. By operation of a spring and a centrifugal pendulum attached on the rotation shaft A side, when a number of revolutions is raised to a predetermined number, brake is operated, and the main rotation shaft A and the driven rotation shaft B are separated in the number of revolutions higher than it, and the transmission of the shafts A and B is disconnected by variation of the number of revolutions. Operation is performed without the usage of electric power so as to prevent a fault of a motor or a power generator connected to the driven shaft B side. Therefore, the small-sized wind power generator exhibiting high safety can be manufactured at the low cost. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention controls a high number of revolutions that cannot be predicted when converting weak winds or strong winds into rotational force, such as a wind power generator or a hydroelectric power generator, and the main rotational shaft (A) that conducts rotation and the rotational force. There is a shaft (B) that is driven and rotated, and a round washer with a slip stopper is fixed to the tip, making it easy to conduct main torque from shaft (A) to shaft (B). The brake is applied when the rotation speed increases to a certain level by the operation of the spring and centrifugal pendulum type attached to the main rotation shaft (A), and the main rotation shaft (A) and the sub rotation shaft (B ) By separating and rotating, the shaft transmission is removed from (A), (B), and the shaft is connected to the driven shaft (B), preventing damage to the motor and generator without using electric power. , Related to centrifugal brakes and clutches characterized by operating structure .

When mainly explaining a wind power generator with a large increase / decrease in the number of rotations, an electric type has been mainly put into practical use as a method for safely controlling the high-speed rotation speed in a strong wind rather than the rotation speed of a weak wind.

Installation of a large wind power generator is advantageous in terms of cost, but there are few installation places from 500KW to 1,500KW, and recently, development of a small wind power generator with one unit of 50KW or less is urgently required.

However, in order to prevent global warming, the spread of wind power generators is indispensable, but it has the advantage of being easy to install at 50 KW or less compared to many large-scale products that have been put to practical use. was there.

In order to popularize practical small wind power generators, the propeller has less wind noise, melts into the surroundings without a sense of obstruction, and can be used as a power generator even in weak and strong winds, ensuring damage prevention, especially in terms of price However, it is desirable to develop a wind power generator that is inexpensive and can be installed in urban areas.

In particular, high-speed rotation control of wind power generators that are in practical use mainly requires electric power, such as control of the current flow to the generator itself and separation of rotational force by hydraulic brake, electromagnetic brake, and electromagnetic clutch. It was controlled by brake and desorption, and it was a factor that required parts, wiring, and electronic parts as a whole, resulting in high costs.

As an improvement measure, there is a method that can be used for a small wind power generator of 20 KW or less, and that can be put into practical use and can be easily and surely provided with a low-cost clutch for attaching and detaching a brake and a spindle shaft.

References are as follows.
JP 2003-516506 A JP-A-2005-141451 JP 2005-118354 A Japanese Patent Laid-Open No. 11-236947 JP 11-182577 A

The conventional issues are as follows.
It is essential to develop a practical number that is easy to spread due to the downsizing and cost reduction of wind power generators.
B. To that end, is there a way to avoid the use of electricity to prevent breakage by detaching from the generator at unusually high rotation during strong winds?
C. If so, how can I control the rotation speed?
D. For the electric control type, large blades require blade conversion, otherwise 1KW or less is the mainstream.
Isn't there a way to reliably attach and detach at low cost without using electricity and performing brake and shaft separation in the same device?
The present invention has been made to solve these drawbacks and problems.

The invention of claim 1 has a main rotating shaft (A) which conducts rotation and a shaft (B) which receives and rotates the rotating force, and a round washer using a slip stopper is fixed to its tip. However, if the main rotational force is made easier to conduct from the shaft (A) to the shaft (B), and if the rotation speed is increased by a spring and a centrifugal pendulum type attached to the rotating shaft (A) side, The brake is applied, and the main rotating shaft (A) and the driven rotating shaft (B) are separated at higher rotation speeds, and the change of the rotating speed (A), (B), the shaft conduction is removed, the driven shaft ( The present invention provides a centrifugal brake and clutch characterized by a structure that operates without using electric power to prevent damage to a motor or a generator connected to the B) side.

The invention of claim 2 uses a large-diameter spring for the central shaft of the main rotating shaft (A), and uses a ball bearing for the centrifugal pendulum for the small size, an oil, a less bearing, and a large size. Relative to springs, leaf springs, large springs, small springs, and types for brakes and grounding plates that hit the pendulum. The tip of the rotating shaft (A) and the non-slip round ring washer use a bearing, which features a structure that prevents shaft runout and improves safety. The centrifugal brake and clutch according to claim 1 are provided.

The present invention has the following effects.
B) Since no electricity is used, an expensive brake and clutch device is not required, and the cost can be reduced.
B) Suppressing the rotational force by the brake effect, and if the rotation speed is higher than that, the shaft is disconnected and it acts as a clutch without fail.
C) Since no electricity is used at all, electronic devices such as wiring and inverters are unnecessary and troubles can be suppressed.
2. Since the use of the present invention makes it possible to manufacture and install low-cost small wind power generators of 2KW to 19KW in a size that can be installed on urban areas and building rooftops, the use of electric appliances is significantly different from conventional use such as for air conditioning and heating. Applications are widespread, small wind generators are expected to be put into practical use, and effective in reducing CO2. The product of the present application can be used for any of a propeller type, a vertical blade type, and a windmill.

For large wind turbines for high speeds, a method of stopping the rotation of the propeller (or blade) is necessary when the wind is strong and the wind is strong. For small machines with a propeller diameter of 6 to 8 m, rotation is possible at low speeds. There is no need to stop.

Recently, rotation control using electricity has been the mainstream in small wind power generators, but since the amount of power generation is only about 600W to 800W, it lacked practicality.
In the invention of the present application, since it can be used from 2KW to 19KW and the price is kept low, it is easy to spread small wind power generators.

Conventional control of the rotational speed is mostly based on electricity. However, when blade conversion is not performed, the amount of power generation is as low as 1 kW or less, which is not practical. When the blades are stopped completely in strong winds, it is necessary to change the direction of the blades. This is not possible in the case of small size, so there are many wind generators of 1 KW or less.

However, in the present invention, the rotation is suppressed by the brake effect to some extent during strong winds, and when it exceeds that, the windmill side shaft and the generator side shaft can be completely separated, and the blade diameter is 6 to 8 m (3 m depending on the location). (Up to ~ 4m), rotating the blade as it is can release the wind pressure to the whole windmill considerably and increase the safety, while the power generation amount of 2KW to 19KW of a low-priced small wind generator is higher than before The purpose of practical application was achieved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a use state, and a perspective portion 1 indicates a position where the centrifugal brake and clutch of the present invention are used. 2 is a generator and 3 is a blade of a windmill.

FIG. 2 is the same as FIG. 1, and is a right side view of the usage state, as shown in a perspective view, and shows the entire appearance of the centrifugal force type brake and clutch of one invention product in use.

FIG. 3 is a front view of the centrifugal brake and clutch, 4 is a minus (−) screw, and 5 is a round washer. 6 is a main rotating shaft.

FIG. 4 is a right side view, and 7 is a flat iron plate lid that is also used as a fixing portion. 1, 4 and 5 are as shown in FIGS.

FIG. 5 is a plan view 7 of the flat iron plate lid, in which four bolt holes 8 are formed and fixed to the outer case.

FIG. 6 is a bottom view, 5 is a circular washer, and a slip-off is given by a file, and 9 is a rotating iron cover, where a roller of a rotating pendulum is received and a brake is applied.

FIG. 7 is a perspective joint view of the internal structure, connected from 3 wind turbine blades, through the shaft 6, 11 external housing cases and 1 centrifugal brake, clutch outer case, shaft 6 (or shaft ( A)) passes through the large spring 14 and cuts in the middle of the 5 circular washer. Twelve centrifugal pendulums (or rollers) may be increased in number to two or four, 14 large springs press 5 round washer, and 5 round washer on 16 driven shaft (B). Are connected, and the rotational force of the wind turbine 3 is a system that rotates the 17 generators and the 2 generators by connecting the main shaft (A) and the driven shaft (B).

Although 18 is a control box, the relationship between the rotational force and the pendulum is linked to the strength of the large spring 14 in particular.

Fig. 8 is a perspective view of the internal structure. If the wind turbine 3 rotates at a high speed, it is transmitted by the main rotating shaft (A), and the 12 centrifugal pendulum rollers first hit the 10 rotating iron cover. The brake is applied by the long hole of the shaft of the ring of some 13 suspension brackets.

There is about 2mm of play in the long hole of the ring of these 13 suspension brackets. When this further rotates, the rotation receiving cover of 10 suppresses the 9 small springs, and further force is required for the rotational force. If this is further exceeded, the 12 pendulum is swung out, the 14 of the large spring is also contracted, the 5 round washer is drawn and separated from the 5 round washer on the 16 driven shaft (B). .

At this time, there is a radial bearing (bottom), and the 16 shaft (B) moves only 3 mm, and does not shift or swing. The round washer 5 at the end of the shaft (A) and the shaft (B) is separated by 1 mm, so there is no problem in safety. Also, the separation width can be adjusted. Incidentally, the separation width of the 5 metal ring washers of the electromagnetic clutch is 0.3 to 0.5 mm.

Fig. 9 is an enlarged view of the main shaft (A) and the driven shaft (B). (A), (B), 5 round ring washers attached to the tip of the shaft are the same as the round ring washer of Fig. 10. It has eyes and plays a role of slip prevention. The driven shaft (B) 16 protrudes from the center of the 5 round washer, and this shaft is always stored in the bearing 15 in the 5 round washer of the main shaft (A). Even if there is a spilled eye, there is no concern that the center will swing, the desorption is within 3 to 4 mm, and since the shaft (B) is not pulled out, the rotation can be performed smoothly.

FIG. 10 is as 0028, and slipping is performed at the file 20.

Measures against strong winds are indispensable for the development of wind power generators, so electric brakes and clutches were used in conventional wind power generators, so the power generation amount was as small as 600 W to 900 W, and it was only used for lighting. Has a high selling price, lacks practicality, and is difficult to spread. However, if the invention of the present application is used, a small wind power generator for 2 KW to 19 KW is inexpensive and can ensure safety, and large-scale use of a regenerator / heater from an air-conditioner and a general household, hospital, fishery It can be provided as a practical wind power generator that is expected to have considerable use and application for consumer use, such as a freezer, has a large industrial economic effect, and also helps to improve the use of natural energy.

Usage front view Usage right side view Front view (centrifugal brake, clutch) Right side view (same as left side view) Plan view Bottom view Internal structure perspective joint diagram Internal structure perspective view Enlarged view of main shaft (A) and driven shaft (B) Round ring washer illustration

Explanation of symbols

3. Centrifugal brake, clutch generator wind turbine (vertical blade) blade -(Minus) screw Round ring washer6. Main rotating shaft (A)
7). Flat iron plate lid8. Bolt hole 9. Kobane
Ten. Rotating iron cover
11． External housing case
12． Centrifugal pendulum (roller)
13. Hanging bracket (ring)
14. Large spring
15． Radial bearing (bottom)
16． Driven shaft (B)
17． belt
18． Controller BOX
19. Timing roller
20． File eyes

Claims (2)

There is a main rotating shaft (A) that conducts rotation and a rotating shaft (B) that receives and rotates the rotating force. A round washer with a slip stopper is fixed to the tip of the rotating shaft (B), and the main rotating force is transferred to the shaft ( It is made to be easy to conduct from A) to shaft (B), and the brake is applied when the rotation speed is increased by a spring and centrifugal pendulum type operation attached to the main rotating shaft (A) side. The main rotating shaft (A) and the driven rotating shaft (B) are separated by the number of rotations.By changing the rotating speed, the shaft transmission is removed and the motor connected to the driven shaft (B) side is installed. Centrifugal brakes and clutches with a structure that operates without using electric power to prevent damage to the generator. A large-diameter spring is used for the central shaft of the main rotating shaft (A), and the centrifugal pendulum uses an oil or less bearing for small size and a ball bearing for large size. Relative springs, leaf springs, large, small, and different types are also used for the brake grounding plate against which the pendulum hits. The centrifugal brake and clutch according to claim 1, characterized in that a bearing is used in the tip of the rotating shaft (A) and a non-slip ring to prevent shaft runout and improve safety.

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