JP6726845B2 - Turbine blade angle adjustment mechanism and adjustment method for tubular turbines - Google Patents

Description

The present invention relates to an adjusting mechanism and an adjusting method capable of adjusting a turbine blade angle of a turbine runner in a small-capacity tubular turbine having a generator capacity of 100 Kw or less.

As shown in Patent Document 1, a small-capacity tubular turbine such as a micro turbine is generally small as shown in FIG. 8, and is supported by an inner casing 4 inside an outer casing 3 forming a flow path 10. A water turbine runner is housed, a generator 8 is installed outside the outer casing 3, and the rotary shaft 5 of the water turbine runner 1 and the drive shaft of the generator 8 are connected via a rotary transmission mechanism using a belt 7 or the like. Is configured. It is stated that the water turbine runner 1 is rotated by the water flow supplied from the flow path 10, this rotational force is transmitted to the generator 8 by the rotation transmission mechanism, and the generator 8 is driven to generate electricity. There is.

In such a conventional small-capacity tubular turbine generator, since the casing is small, the generator cannot be housed in the inner casing, and the generator is installed outside the outer casing.

When the flow rate of the water flow supplied from the flow path changes, the pitch angle of the water wheel of the water wheel runner is adjusted by rotating the water wheel blade of the water wheel runner about an axis perpendicular to the rotation axis according to the change of the flow rate. It is well known that, by doing so, a decrease in the efficiency of the water turbine with respect to changes in the flow rate is suppressed, and operation with high efficiency is possible in a wide flow rate range.

Therefore, in the conventional small-capacity tubular turbines, in many cases, turbine blade fixed type turbines in which the pitch angle of the turbine blades is fixed have been used. When the flow rate required for the operation cannot be ensured, the operation has to be stopped, and the operable flow rate range is narrowly limited.

In Patent Document 2, as shown in FIG. 9, in a small-capacity tubular turbine, it is axially movable into an inner casing 4 supporting the turbine runner 1 so that the pitch angle of the turbine blades 1-1 can be arbitrarily adjusted. An operating shaft 9-2 is provided, and one end of the operating shaft 9-2 is rotatably connected to the rotary shaft of the water turbine blade 1-1 via the link mechanism 9-1, and the other end of the operating shaft 9-2 is connected. The end is connected to a motion converting mechanism 9-3 provided in the inner casing 4 for converting a rotary motion into a linear motion, and a water turbine blade driving motor 9-4 is installed outside the outer casing 3 to install a belt 9 -5 describes a mechanism for transmitting the rotational force of the motor 9-4 to the motion converting mechanism.

In Patent Document 3, in a small-capacity tubular turbine, in order to adjust the pitch angle of the turbine blades, the turbine blades are replaced and a taper pin that penetrates the turbine blades so that the turbine blades can be easily fixed to the runner boss. A striking structure is described.

JP 2002-295395A JP, 2004-316484, A JP, 2007-32338, A

In recent years, the renewable energy purchase system has been put into operation, and even for water sources with a small flow rate, which have been overlooked until now, there are an increasing number of companies that plan to sell electricity by installing micro turbines to generate power of 100 Kw or less. However, when a water source survey is conducted, the development of abundant water sources progresses, and there are many water sources that can be utilized in the future, where the amount of water and the head change greatly depending on the season. Up to now, many small-capacity tubular turbines have been installed that can be easily installed in a water source with a low head and a relatively small flow rate as shown in FIG. The tubular turbine is a turbine with a fixed propeller-shaped turbine blade 1-1 attached to the turbine runner 1, and is effective when the amount of water does not change. When the effective head and the amount of water flowing through the flow path 10 change, the pitch angle of the water wheel blades 1-1 does not change, and the power generation efficiency significantly decreases.

An effective means for responding to this head difference and flow rate change and always maintaining high power generation efficiency is a mechanism for varying the pitch angle of the turbine blade 1-1 incorporated in the turbine runner 1 described in Patent Document 2. is there. Since the diameter of the water turbine runner 1 is large in a large-sized water turbine of 1000 Kw or more, it is easy to incorporate a hydraulic cylinder or a link mechanism inside the runner boss 1-2. As shown in Fig. 9, in a small-capacity tubular turbine that generates power of 100 Kw or less, the diameter of the runner boss 1-2 that supports the turbine blade 1-1 is small, and the linear movement of the operating shaft 9-2 can be performed in a limited space. It is necessary to provide a mechanism for converting the angle of the turbine blade 1-1 by the link mechanism 9-1 into a turning motion.

In a tubular turbine, there are usually four to five turbine blades 1-1 and it is necessary to move them at the same time, so the link mechanism 9-1 also becomes complicated. Further, since the operation shaft 9-2 is moved in the axial direction while rotating the water turbine runner 1, the operation shaft 9-2 must have a double structure that is inside the main shaft 4 that rotates at high speed. The structure is complicated because the pitch angle of the turbine blade 1-1 is changed while the turbine is operating, the number of parts is increased, and the price is higher than the fixed turbine blade 1-1.

In order to solve the above-mentioned problems, the present invention uses a small-capacity tubular turbine to constantly maintain high power generation efficiency and recover the pitch of turbine blades when recovering generated electric power by utilizing a small river in which the amount of water changes greatly depending on the season. It is an object of the present invention to provide a power generation system and method that can install a small-capacity tubular turbine, without being able to adopt a mechanism that enables easy angle adjustment.

The present invention relates to a tubular turbine, wherein the tubular turbine includes a casing that forms a flow path, and a turbine runner that is rotatably supported by the casing and that has a plurality of turbine blades.
A turbine blade angle adjusting mechanism provided in the runner boss provided in the turbine runner and having a sealed internal space,
One of which is connected to the water turbine angle adjusting mechanism via a connector, and the other of which is a turbine blade angle adjusting shaft exposed to the outside of the turbine runner,
A tubular water turbine characterized in that the water turbine blade angle adjusting shaft is rotatable from the outside of the casing by a manual operation with a tool or a device, and the opening pitch angles of a plurality of water turbine blades are adjusted by the rotation. ..

The present invention, a tubular turbine, a casing that forms a flow path, and a rotatably supported by the casing, comprising a turbine runner having a plurality of turbine blades, in a power generation system comprising the tubular turbine,
A tubular turbine is a turbine blade angle adjusting mechanism provided in a sealed internal space inside a turbine turbine runner, and one of the turbine blade angle adjusting mechanism is connectable to the turbine turbine blade angle adjusting mechanism, and the other is exposed to the outside of the turbine turbine runner. And an angle adjustment axis,
The turbine blade angle adjusting shaft includes a pitch angle adjusting section for adjusting the pitch angle of the turbine blade,
The amount of water measured throughout the year of the river in which the tubular turbine is installed is acquired and preset for the amount of water measured for each season, and the correctable pitch angle of the turbine blade is the turbine blade pitch angle adjusting device. Stored in the storage means of
Seasonal information is acquired,
Power generation by a tubular turbine, wherein the turbine blade is adjusted by a tool or a device from the outside of the turbine runner to a preset pitch angle for each acquired season by the operator's operation of the pitch angle adjusting unit. Provide the system.

The present invention, in the above-described tubular turbine or a power generation system including a tubular turbine,
A turbine blade angle adjusting mechanism is provided on a turbine blade angle adjusting shaft and a bevel gear (A) arranged at the center of rotation of the turbine, a bevel gear (B) connected to the root of the turbine blade, and a turbine wheel angle adjusting shaft. , A bevel gear (A) interlocked with each other, and each bevel gear (B) has a bevel gear partially cut away so that adjacent bevel gears do not mesh with each other. The present invention provides a tubular turbine or a power generation system equipped with the tubular turbine.

The present invention, a tubular turbine, a casing that forms a flow path, and a rotatably supported by the casing, comprising a turbine runner having a plurality of turbine blades, in a power generation method of a power generation system including the tubular turbine,
A tubular turbine is a turbine blade angle adjusting mechanism provided in a sealed internal space inside a turbine turbine runner, and one of the turbine blade angle adjusting mechanism is connectable to the turbine turbine blade angle adjusting mechanism, and the other is exposed to the outside of the turbine turbine runner. And an angle adjustment axis,
The turbine blade angle adjusting shaft includes a pitch angle adjusting section for adjusting the pitch angle of the turbine blade,
The amount of water measured throughout the year of the river in which the tubular turbine is installed is acquired and preset for the amount of water measured for each season, and the correctable pitch angle of the turbine blade is the turbine blade pitch angle adjusting device. Stored in the storage means of
Seasonal information is acquired,
The tubular turbine is characterized in that the turbine blade is adjusted to a preset pitch angle for each acquired season from the outside of the turbine runner with a tool or a device by operating the pitch angle adjusting section of the operator. A power generation method of a power generation system is provided.

According to the present invention, the turbine blade angle adjusting shaft is rotatable from the outside of the turbine runner by a manual operation with a tool or a device, the opening pitch angles of the plurality of turbine blades are adjusted by the rotation, and the turbine blade is By the operation of the pitch angle adjusting unit by the operator, the pitch angle is adjusted to a preset pitch angle for each acquired season from the outside of the water turbine runner with a tool or a device. This allows the small-capacity tubular turbine to maintain high power generation efficiency and easily adjust the pitch angle of the turbine blade when recovering generated power from a small river whose water volume changes greatly depending on the season. It is possible to provide a power generation system and method capable of installing this small-capacity tubular water turbine without adopting the mechanism.

It is a figure which shows the outline of the Example in this invention. It is a longitudinal cross-sectional view showing a small-capacity tubular turbine according to an embodiment of the present invention. It is sectional drawing which shows the runner boss internal structure which is one Embodiment of this invention. FIG. 4 is a sectional view taken along the line AA showing the internal structure of the runner boss in FIG. 3. It is a figure explaining the meshing of the bevel gear (B) which is one embodiment of the present invention. It is a figure explaining the pitch angle change of the turbine blade which is one embodiment of the present invention. It is a longitudinal cross-sectional view of the mechanism which rotates the bevel gear which is one Embodiment of this invention by remote control. It is a longitudinal section showing a conventional example of a small-capacity tubular turbine. It is a longitudinal cross-sectional view showing a conventional example of a small-capacity tubular turbine having a movable turbine blade.

FIG. 1 is a diagram showing an outline of an embodiment of the present invention.

FIG. 1 schematically shows a power generation system 200 including a small-capacity tubular turbine (hereinafter, referred to as a tubular turbine) 100 that solves the above-mentioned problems. The target of application of this power generation system 200 is a small river 50 in which the amount of water, the head, especially the amount of water greatly changes depending on the season. In this river 50, a tube turbine 100 and a water amount measuring device 51 are installed. An existing water amount measuring device can be adopted as the water amount measuring device 51, and the installation place on the small river 50 is arbitrary.

The power generation system 200 is composed of an IT device incorporating a tube turbine 100, a water amount measuring device 51, and a solving means 90, that is, a typical personal computer.

The water amount measuring device 51 measures the water amount and the head 52 for each season. The measured data is stored 53 in advance in the storage means (not shown) of the personal computer as seasonal data.

In the tubular turbine 100, the pitch angle of the turbine blades is adjusted as described below. In this power generation system 200, the pitch angle adjustment 101 of the turbine blade is required.

Further, when power is generated by a water turbine installed in such a small river, there is a demand 102 that the price is low for installing the water turbine. In the case of the present embodiment, a double structure in which an operation shaft provided for adjusting the turbine blade pitch angle is inserted inside the main shaft as described later cannot be adopted because it is expensive. That is, the double structure in which the operation shaft is inserted inside the main shaft is not allowed.

Means 90 for solving these problems are indicated by means 91-94. Season-pitch angle relationship setting 91 is made in advance. This relationship can be easily set and corrected by preliminarily accumulating 53 as seasonal data in advance and calculating based on the design data of the tube turbine 100.

Seasonal data is acquired. Seasonal information acquisition 92 is performed by a calendar or from data based on the judgment of the operator in charge based on the amount of rainfall in that year. Seasonal information determined in advance by a calendar may be adjusted based on the judgment of the person in charge of operation. This seasonal information acquisition 92 has an important meaning from the economical point of view for power generation using the small river as described above.

The turbine blade is adjusted 93 from the outside of the casing by a tool or a device by an operator to a preset pitch angle in relation to each season.

The pitch angle is adjusted 93, and the tubular turbine 100 is operated 94.

In this way, the tubular water turbine 100 includes the casing forming the flow path 10 and the water turbine runner 1 rotatably supported by the casing and having a plurality of water turbine blades 1-1, and includes the tubular water turbine. The power generation system is configured as follows.

A tubular turbine is a turbine turbine blade angle adjusting mechanism provided in a sealed internal space inside the turbine turbine runner 1, and one of the turbine turbine blade angle adjusting mechanism is connectable to the turbine turbine turbine and the other is exposed to the outside of the turbine turbine runner 1. And a blade angle adjusting shaft 2.

The turbine blade angle adjusting shaft 2 includes a pitch angle adjusting unit that adjusts the pitch angle of the turbine blade 1-1.

The amount of water measured throughout the year in the river in which the tubular turbine is installed is acquired.
The pitch angle of the water turbine blade, which is preset and correctable for the water amount measured for each season, is stored in the storage means of the water turbine blade pitch angle adjusting device.

Seasonal information is acquired.

The water turbine blade is adjusted by a tool or a device from the outside of the water turbine runner 1 to the pitch angle preset in each acquired season by the operator's operation of the pitch angle adjusting unit.

The operation 94 of the tubular turbine 100 is performed at the adjusted pitch angle.

An embodiment of a mechanism for varying the pitch angle of the turbine blades 1-1 suitable for the small capacity tubular turbine 100 will be described with reference to FIGS. 2, 3 and 4.

FIG. 2 is a vertical sectional view showing a small-capacity tubular turbine according to an embodiment of the present invention.

FIG. 3 is a sectional view showing the internal structure of the runner boss according to the embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA showing the internal structure of the runner boss in FIG.

A tubular turbine includes a casing that forms a flow path, and a turbine turbine that is rotatably supported by the casing and has a turbine runner having a plurality of turbine blades.
A turbine blade angle adjusting mechanism provided in the runner boss provided in the turbine runner and having a sealed internal space,
One of which is connected to the water turbine angle adjusting mechanism via a connector, and the other of which is a turbine blade angle adjusting shaft exposed to the outside of the turbine runner,
The water turbine blade angle adjusting shaft is configured to be rotatable from the outside of the water turbine runner by a manual operation by a tool or a device, and the rotation adjusts the open pitch angles of the plurality of water turbine blades. This will be described below.

FIG. 2 shows a schematic sectional view of the small-capacity tubular turbine 100. The mechanism of the present embodiment that allows the water turbine blades 1-1 attached to the runner bosses 1-2 constituting the water turbine runner 1 to rotate will be described with reference to the sectional view of the runner bosses 1-2 in FIG.

A tubular turbine 100 includes a casing forming a flow path 10 and a turbine runner 1 rotatably supported by the casing and having a plurality of turbine blades 1-1. The casing includes an outer casing 3 and an inner casing. The inner casing 4 has a cylindrical shape and houses the main shaft 5.

The water turbine runner 1 has a runner boss 1-2a attached to the tip of a main shaft 5, and the runner boss 1-2 has a structure in which it is divided into 1-2a and 1-2b. Four or five turbine blades 1-1 are sandwiched by the two-divided runner bosses 1-2 and are rotatably assembled. The root shaft of the water turbine blade 1-1 incorporated in the runner boss 1-2 is inserted into the inner diameter portion of the bevel gear (B) 1-3 to be integrated. The bevel gear (A) 1-5 meshing with the bevel gear (B) 1-3 is arranged at a position where the rotation center of the bevel gear (A) 1-5 and the rotation center of the water turbine runner 1 coincide with each other. It meshes with the bevel gear (B) 1-3 attached to the turbine blade 1-1.

As shown in FIG. 4, the bevel gears (B) 1-3 incorporated in the water turbine blade 1-1 shaft are round gears so as not to mesh with the bevel gears (B) 1-3 adjacent to each other. The left and right gear parts are formed by cutting and removing, so that it becomes an oval bevel gear. The tooth surfaces of the adjacent gears of the bevel gear (B) 1-3 may be cut out so that meshing does not occur. As shown in FIG. 6(b), if the adjacent bevel gears (B) 1-3 mesh with each other, the bevel gears (B) 1-3 move in the opposite direction to the adjacent bevel gears (B) 1-3. Rotate. When the water turbine runner 1 is developed on a plane, it is represented as shown in FIG. The pitch angle (1) of the water turbine blade 1-1 does not rotate in parallel, the reference water turbine blade 1-1 moves from the pitch angle (1) to the pitch angle (2), and the adjacent water turbine blade 1-1 is reversed. Since it rotates in the direction, the pitch angle (1) changes to the pitch angle (3). Since the pitch angle (2) and the pitch angle (3) of the water turbine blade 1-1 after turning are not parallel, normal rotation of the water turbine runner 1 cannot be performed.

The bevel gears (B) 1-3 attached to all the turbine blades 1-1 mesh only with the bevel gears (A) 1-5, and the turbine blades 1-1 rotate in parallel.

As shown in FIG. 5, the adjustment angle S of the water turbine blade 1-1 required for the drop or the change in the flow rate is about 25 degrees at the maximum. Therefore, the required meshing angle range of the bevel gear (B) 1-3 and the bevel gear (A) 1-5 attached to the water turbine blade 1-1 is also small, so cut and remove the left and right teeth. However, the problem of meshing does not occur. It is possible to make the diameter of the bevel gear (A) 1-5 larger so as not to mesh with the bevel gear (B) 1-3 adjacent to each other without cutting and removing the teeth. However, when the diameter of the bevel gear (A) 1-5 is increased, the outer diameter of the runner boss 1-2 is also increased. When the diameter of the turbine runner 1 suitable for a small-capacity tubular turbine is obtained from fluid calculation, the outer diameter of the runner boss 1-2 is also limited. In the case of the angle adjusting mechanism of the water turbine blade 1-1 using gears, the means for removing the unnecessary part for meshing and leaving the tooth part for transmitting the rotation angle makes the rotating mechanism in the runner boss 1-2 compact. It is important for the composition.

In this way, the bevel gear (A) is arranged at the center of rotation of the water turbine, and the bevel gear (B) is also attached to all the roots of the water turbine blades inserted into the runner boss, and the bevel gears are mounted at the roots of the turbine blades. The bevel gear (B) has a shape in which a part of the tooth surface of the bevel gear (B) is cut out so as not to mesh with the adjacent bevel gear (B).
The bevel gear (B) meshes only with the bevel gear (A), the bevel gear (B) is rotated by the rotation of the bevel gear (A), and the turbine blade is rotated by the rotation of the bevel gear (B). All have the structure to rotate the same angle in the same direction,
As shown in FIG. 9, the tubular turbine is constructed in which the pitch angle of the turbine blade can be arbitrarily adjusted. As shown in FIG. 9, the linear movement of the operation shaft 9-2 incorporated in the main shaft 5 is changed to the turbine blade 1-1. In order to change it into a rotational movement, a lever and a link are generally used in the runner boss 1-2, and a mechanism for connecting the lever and the ink with a pin is generally used. Since the inner diameter of the runner boss 1-2 cannot be increased, the radius of rotation of the lever cannot be increased, and the rotational force is transmitted to the water turbine blade 1-1 by the short lever, which imposes a heavy load on the connecting pin. Therefore, strength reliability is lowered. In the present invention, since the rotation angle is transmitted by the bevel gear, the force can be smoothly transmitted, and the strength reliability is high even in the mechanism incorporated in the narrow space.

The bevel gear (A) 1-5 is attached to the worm speed reducer 1-4 that is a connector, and the bevel gear (A) 1-5 is rotated by the rotation of the worm speed reducer 1-4. While the water turbine runner 1 is rotating, a couple of forces that try to rotate around the shaft center of the turbine blade 1-1 is generated by the water pressure applied to the turbine blade 1-1, and the couple force is transmitted through the bevel gear (B) 1-3 to the worm. It is transmitted to the speed reducer 1-4. Since the worm reducer 1-4 having a relatively large reduction ratio is used, the self-locking function of the worm reducer 1-4 restrains the rotational torque from the bevel gear (B) 1-3 caused by water pressure. .. Therefore, even if the pitch angle of the water turbine blade 1-1 is arbitrarily rotated, the meshing position of the bevel gear (A) 1-5 and the bevel gear (B) 1-3 is set without using a mechanism such as a brake. It becomes possible to hold. The worm speed reducer 1-4 simultaneously achieves both a speed reduction function and a rotation stop function.

As shown in FIG. 5, the rotation angle required for the bevel gear (A) 1-5 is about 25 degrees. If the adjustment angle per time is set to about 5 degrees, fine adjustment of the angle is performed. When the reduction ratio of the worm reducer 1-4 is set to 1/36, when the bevel gear (A) 1-5 is rotated 5 degrees, the rotation angle of the worm shaft is 180 degrees. It becomes 45 degrees at 2.5 degrees. By setting the reduction ratio of the worm reducer 1-4 to 1/36, the pitch angle of the changed water turbine blade 1-1 can be estimated only by visually confirming the rotation angle of the tool 12.

The turbine blade angle adjusting shaft 2 is attached to the tip of the worm shaft. The rotation from the turbine blade angle adjusting shaft 2 is reduced by the worm reducer 1-4, and the rotation angle is transmitted to the meshed bevel gear (B) 1-3 through the bevel gear (A) 1-5. To be Since all the water turbine blades 1-1 mesh with one bevel gear (A) 1-5 through the bevel gear (B) 1-3, they rotate at the same angle.

The turbine blade angle adjusting shaft 2 is arranged so that it can be rotated from the outside of the turbine runner 1, that is, the outside of the runner boss 1-2 in order to make it easier to rotate. As shown in FIG. 1, the runner bosses 1-2 are incorporated inside the outer casing 3. The outer casing 3 is connected to the flow path 10 of the river 51 shown in FIG. 1, and is connected from the water source of the river 51 to the outlet. It is necessary to remove the outer casing 3 in order to rotate the water wheel impeller angle adjusting shaft 2 attached to the runner boss 1-2. Since it is heavy to remove the outer casing 3 and it is difficult to remove the outer casing manually, it is necessary to prepare equipment for performing the work.

Since the water wheel impeller angle adjusting shaft 2 attached to the runner boss 1-2 is rotated, a large amount of work is required.

In order to solve this problem, as an example, a part of the outer casing 3 can be removed. The turbine blade angle adjusting shaft 2 is installed in the vertical direction as shown. A tool 12 for rotating the turbine blade angle adjusting shaft 2 can be vertically inserted into the outer casing 3 from the removed portion. As shown in FIG. 2, an inspection hatch 11 that can also inspect the inside of the outer casing 3 is provided in a part of the outer casing 3, and the operation is stopped to open the inspection hatch 11. A pulley connecting the generator 8 and the belt 7 has a shaft, and a clutch 14 is provided on the shaft. The clutch 14 is opened during operation, and the clutch 14 is connected when adjusting the turbine blade 1-1 so that the rotational force of the motor 15 with a reducer is transmitted to the main shaft 5 via the belt 7. .. The turbine blade 1-1 is slowly rotated around the main shaft 5 by the rotation of the motor 15 with a reducer, the direction of the turbine blade angle adjusting shaft 2 is confirmed from the inspection hatch 11, and the turbine blade angle adjusting shaft 2 can be operated from the outside. When it comes to the predetermined position, the motor 15 with a reducer is stopped.

Insert the tool 12 from the inspection hatch 11 toward the turbine blade angle adjusting shaft 2 and fix it. The turbine blade angle adjusting shaft 2 is rotated while visually confirming the pitch angle of the turbine blade 1-1 and the scale provided on the runner boss 1-2. Thus, in a short time, the operator easily rotates the turbine blade angle adjusting shaft 2 from the outside of the turbine runner 1 with the tool 12 inserted from the outside of the outer casing 3 to adjust the pitch angle of the turbine blade. Since water pressure from the flow path 10 is generated in the inspection hatch 11, the inspection hatch 11 is firmly attached so that water leakage does not occur. The turbine blade pitch angle can be easily operated from the outside of the turbine runner 1.

As another embodiment, this inspection hatch 11 is made of a transparent material such as acrylic, and the inspection hatch 11 is not removed, but is rotated by the motor 15 with a reduction gear in the same manner as above, and the transparent inspection hatch 11 is rotated from the outside. The position of the blade 1-1 may be confirmed. A plug (not shown) is provided in a part of the outer casing 3 so that only the tool 12 can be inserted, and while checking the pitch angle of the turbine blade 1-1 from the transparent inspection hatch 11, the turbine blade angle adjusting shaft 2 is inserted from the plug. It is also possible to rotate it with the above-mentioned tool 12.

FIG. 7 is a vertical cross-sectional view of a mechanism for remotely rotating a bevel gear according to an embodiment of the present invention.

As shown in FIG. 7, a magnet 16 or the like is embedded in the tip of the water turbine blade 1-1, a non-contact position sensor 17 is attached to the outer casing 3, and the rotational position and pitch angle of the water turbine blade 1-1 are also confirmed remotely. You can In this method, the turbine blade angle adjusting shaft 2 can be rotated without removing the outer casing 3, so that the turbine turbine can be operated with optimum efficiency corresponding to the flow rate and the head by stopping power generation for a short time. It becomes easy to adjust the pitch angle of 1-1.

As described above, the mechanism and the method in which the worker rotates the turbine blade angle adjusting shaft 2 using the tool 12 to adjust the pitch angle of the turbine blade 1-1 suitable for the small capacity tubular turbine have been described.

When it is difficult for an operator to approach the location where the turbine is installed due to snow or the like in winter, it is desirable to remotely adjust the pitch angle of the turbine blade 1-1.

A mechanism for remotely adjusting the pitch angle by using the automatic rotary tool device 13 will be described with reference to FIG. 7 instead of the operator operating the tool 12.

A mechanism for attaching the automatic rotating tool device 13 to the outer casing 3 and rotating the turbine blade angle adjusting shaft 2 electrically or aerodynamically to adjust the pitch angle of the target turbine blade 1-1 will be described. The automatic tool rotation device 13 includes a tool portion 13-1 with a guide, a rod 13-2 that pushes the tool portion 13 to the turbine blade angle adjusting shaft 2, and a speed reducer that rotates the turbine blade angle adjusting shaft 2 to a target rotation angle. It is composed of an attached motor 13-3, a cylinder 13-4 for retracting the tool portion 13-1 during the water turbine operation, and a frame 13-5 for attaching the automatic tool rotating device 13 to the outer casing 3.

When the rotation of the water turbine runner stops, the clutch 14 and the motor 15 with a speed reducer rotationally move the water turbine blade 1-1 to the working position. The tool portion 13 is inserted into the turbine blade angle adjusting shaft 2 by the cylinder 13-4, and the turbine blade angle adjusting shaft 2 is rotated to a target angle by the motor 13-3 with a reducer. The following movements are the same as when the operator rotates the turbine blade angle adjusting shaft 2 with the tool 12. In this method, it is necessary to stop the operation of the turbine and rotate the turbine blade angle adjusting shaft 2, but by installing the position sensor 17 and the automatic tool rotating device 13 described in FIG. It is possible to introduce a remote control mechanism to easily operate the angle from the outside of the outer casing.

1... Turbine runner, 1-1... Turbine blade, 1-2... Runner boss, 1-3... Bevel gear (B), 1-4... Worm reducer, 1-5... Bevel gear (A), 2 ... Turbine blade angle adjusting shaft, 3... Outer casing, 4... Inner casing, 5... Main shaft, 7... Belt, 8... Generator, 9... Turbine blade adjusting mechanism, 9-1... Link mechanism, 9-2... Operation shaft 10... Flow path, 11... Inspection hatch, 12... Tool, 13... Automatic tool rotating device, 14... Clutch, 15... Motor with reduction gear, 16... Magnet, 17... Non-contact position sensor, 51... Water amount measurement Vessel, 52... Seasonal water volume, head measurement, 53... Pre-stored as seasonal data, 90... Solution means (IT equipment, personal computer), 91... Seasonal-pitch angle relation setting, 92... Seasonal information acquisition, 93 …Adjust to pitch angle, 94. …Tubular turbine operation, 200…Power generation system with tubular turbine.

Claims (4)

A tubular turbine includes a casing that forms a flow path, and a turbine turbine that is rotatably supported by the casing and includes a turbine runner having a plurality of turbine blades.
A turbine blade angle adjusting mechanism provided in the runner boss provided in the turbine runner and having a sealed internal space,
One of the turbine blade angle adjusting mechanism is connected via a connector, the other is exposed to the outside of the turbine runner, and the turbine blade angle adjusting shaft is installed inside the casing in a vertical direction.
A tool that can be inserted into the casing from the outside of the turbine runner,
The turbine blade angle adjustment shaft is made rotatable by the tool vertically inserted into the casing from the outside of the turbine runner, and the turbine blade angle is adjusted from the outside of the turbine runner by an artificial operation of the tool. A tubular turbine, wherein a shaft rotates and the opening pitch angles of a plurality of turbine blades are adjusted by the rotation. A tubular turbine includes a casing that forms a flow path, and a turbine turbine that is rotatably supported by the casing and includes a turbine runner having a plurality of turbine blades.
A turbine blade angle adjusting mechanism provided in the runner boss provided in the turbine runner and having a sealed internal space,
One of the turbine blade angle adjusting mechanism is connected via a connector, and the other is a turbine blade angle adjusting shaft exposed to the outside of the turbine runner.
The turbine blade angle adjusting shaft is rotatable from the outside of the turbine runner by a tool or a device by an artificial operation, and the rotation adjusts the open pitch angles of the plurality of turbine blades.
The turbine blade angle adjusting mechanism is provided on the turbine blade angle adjusting shaft and the bevel gear (A) arranged at the center of rotation of the turbine, the bevel gear (B) connected to the root of the turbine blade, and the turbine blade angle adjusting shaft. consists of a coupling element which is engaged by a bevel gear (a), the bevel gear (B) may be in a form between adjacent bevel gears partial cutaway teeth of bevel gears so as not to engage and A tubular turbine that has been characterized. A tubular turbine includes a casing forming a flow passage, and a turbine runner that is rotatably supported by the casing and has a plurality of turbine blades, in a power generation system including the tubular turbine.
A tubular turbine is a turbine blade angle adjusting mechanism provided in a sealed internal space inside a turbine turbine runner, and one of the turbine blade angle adjusting mechanism is connectable to the turbine turbine blade angle adjusting mechanism, and the other is exposed to the outside of the turbine turbine runner. And an angle adjustment axis,
The turbine blade angle adjusting mechanism is provided on the turbine blade angle adjusting shaft and the bevel gear (A) arranged at the center of rotation of the turbine, the bevel gear (B) connected to the root of the turbine blade, and the turbine blade angle adjusting shaft. , A bevel gear (A) interlocking member, and each bevel gear (B) has a bevel gear partially cut out so that adjacent bevel gears do not mesh with each other. And
The turbine blade angle adjusting shaft includes a turbine blade pitch angle adjusting section for adjusting the pitch angle of the turbine blade,
The amount of water measured throughout the year of the river in which the tubular turbine is installed is acquired and preset for the amount of water measured for each season, and the correctable pitch angle of the turbine blade is the turbine blade pitch angle adjusting device. Stored in storage means,
Seasonal information is acquired,
Power generation by a tubular turbine, wherein the turbine blade is adjusted by a tool or a device from the outside of the turbine runner to a preset pitch angle for each acquired season by the operator's operation of the pitch angle adjusting unit. system. A tubular turbine includes a casing that forms a flow path, and a turbine that is rotatably supported by the casing and has a turbine runner having a plurality of turbine blades, and in a power generation method of a power generation system that includes the tubular turbine,
The tubular turbine is a turbine blade angle adjusting mechanism provided in a sealed internal space in the turbine turbine runner, and one of the turbine blade angle adjusting mechanism is connectable, and the other is exposed to the outside of the turbine turbine runner. A turbine blade angle adjusting shaft installed vertically in the casing,
The turbine blade angle adjusting shaft includes a turbine blade pitch angle adjusting section for adjusting the pitch angle of the turbine blade,
A tool that can be inserted into the casing from the outside of the turbine runner,
The turbine blade angle adjustment shaft is made rotatable by the tool vertically inserted into the casing from the outside of the turbine runner, and the turbine blade angle is adjusted from the outside of the turbine runner by an artificial operation of the tool. The shaft rotates, the rotation adjusts the open pitch angle of the plurality of turbine blades,
The amount of water measured throughout the year of the river in which the tubular turbine is installed is acquired, and the pitch angle of the turbine blade that can be corrected is preset with respect to the water amount measured for each season. Stored in storage means,
Seasonal information is acquired,
A tubular water turbine characterized in that the turbine blade is adjusted by a tool or a device from the outside of the water turbine runner to a preset pitch angle for each acquired season by the operator operating the pitch angle adjusting unit. Power generation method of power generation system.

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