JP2017186951A - Turbine blade angle adjustment mechanism for tubular water turbine and adjustment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a mechanism to be employed at a small capacity tubular turbine in which a high power generating efficiency is always maintained and a water turbine blade pitch angle adjustment can be carried out conveniently when generated power force is recovered through utilization of small river where its amount of water is widely changed in response to a season.SOLUTION: In this invention, a water amount measured yearly at a river where a tubular water turbine is installed is taken and pre-set in respect to the water amount measured for every season, a correctable pitch angle of a water turbine blade is stored in memory means of the water turbine blade pitch angle adjustment device, season information is taken and the water turbine blade is adjusted through an operator's pitch angle adjustment part operation to a pre-set taken pitch angle for every season from outside a water turbine runner by a tool or a device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an adjustment mechanism and an adjustment method that can adjust a turbine blade angle of a turbine runner in a small capacity tubular turbine having a power generation capability of 100 Kw or less.

  As shown in Patent Document 1, a small-capacity tubular water turbine called a micro water turbine is generally small as shown in FIG. 8 and is supported by an inner casing 4 in an outer casing 3 that forms a flow path 10. The turbine runner is accommodated, the generator 8 is installed outside the outer casing 3, and the rotation shaft 5 of the turbine runner 1 and the drive shaft of the generator 8 are connected via a rotation transmission mechanism using a belt 7 or the like. Configured. It is stated that the water turbine runner 1 is rotated by the water flow supplied from the flow path 10, and this rotational force is transmitted to the generator 8 by the rotation transmission mechanism, and the generator 8 is driven to generate power. Yes.

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

  In addition, when the flow rate of the water flow supplied from the flow path changes, the pitch angle is adjusted by rotating the turbine blade of the turbine runner about an axis perpendicular to the rotation axis in accordance with the change in the flow rate. By doing so, it is well known that the reduction in the efficiency of the water turbine with respect to the flow rate change is suppressed, and that it is possible to operate with high efficiency in a wide flow rate range.

  For this reason, in the conventional small-capacity tubular turbine, a turbine blade fixed type turbine in which the pitch angle of the turbine blade is fixed has been used in many cases. When a flow rate required for operation cannot be ensured, the operation has to be stopped, and there is an inconvenience that the operable flow range is limited.

  In Patent Document 2, as shown in FIG. 9, in a small-capacity tubular turbine, it can be moved in the axial direction into an inner casing 4 that supports the turbine runner 1 so that the pitch angle of the turbine blade 1-1 can be adjusted arbitrarily. An operation shaft 9-2 is provided, and one end of the operation shaft 9-2 is connected to the rotation shaft of the water turbine blade 1-1 through the link mechanism 9-1 so as to be rotatable. The end is coupled to a motion conversion mechanism 9-3 for converting a rotational motion provided in the inner casing 4 into a linear motion, and a turbine blade driving motor 9-4 is installed outside the outer casing 3 to provide a belt 9 -5 describes a mechanism for transmitting the rotational force of the motor 9-4 to the motion conversion mechanism.

  In Patent Document 3, in a small-capacity tubular turbine, a taper pin penetrating the turbine blade and the runner boss is provided so that the turbine blade can be easily fixed to the runner boss in order to adjust the pitch angle of the turbine blade. The structure of driving is described.

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

  In recent years, a renewable energy purchase system has been in operation, and there are an increasing number of companies planning to sell power by installing micro water turbines and generating power of 100 Kw or less even for water sources with low flow rates that have been overlooked so far. However, when a water source survey is conducted, the development of abundant water sources has progressed, and many of the water sources that can be used in the future vary greatly depending on the season. Until now, there have been many small-capacity tubular water turbines that can be easily installed in a water source with a low head and a relatively low flow rate as shown in FIG. The tubular water turbine is a water wheel provided with a propeller-shaped water turbine blade 1-1 fixed to the water 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 turbine blade 1-1 does not change, and the power generation efficiency greatly decreases.

  In response to this head drop and flow rate change, an effective means for constantly maintaining high power generation efficiency is a mechanism for changing the pitch angle of the water turbine blade 1-1 incorporated in the water turbine runner 1 described in Patent Document 2. is there. Since the diameter of the water turbine runner 1 is large in a medium-sized water turbine of 1000 Kw or more, it is easy to incorporate a hydraulic cylinder and 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 thin, and the operation shaft 9-2 moves linearly in a limited space. It is necessary to provide a mechanism for converting into a turning motion that changes the angle of the water turbine blade 1-1 by the link mechanism 9-1.

  In a tubular water turbine, there are usually four to five turbine blades 1-1, which need to be moved at the same time, so the link mechanism 9-1 is also complicated. Further, in order to move the operation shaft 9-2 in the axial direction while rotating the water turbine runner 1, the operation shaft 9-2 must have a double structure that enters the main shaft 4 that rotates at high speed. Since the pitch angle of the water turbine blade 1-1 is changed while driving the water turbine, the structure is complicated, the number of parts is increased, and the price is higher than that of the fixed water turbine blade 1-1.

  In order to solve the above-mentioned problems, the present invention always maintains high power generation efficiency when collecting generated power using a small river whose water volume varies greatly depending on the season. It is an object of the present invention to provide a power generation system and method capable of installing a small-capacity tubular water turbine, which can adopt a mechanism that enables simple angle adjustment.

The present invention relates to a tubular turbine including a casing in which a tubular turbine is formed, and a turbine runner that is rotatably supported by the casing and has a plurality of turbine blades.
A turbine blade blade angle adjusting mechanism provided in a runner boss formed in a turbine runner and having a sealed internal space formed;
A turbine blade angle adjusting shaft, one of which is connected to the turbine angle adjusting mechanism via a connector and the other is exposed to the outside of the turbine runner,
The tubular turbine wheel is characterized in that the turbine blade blade angle adjustment shaft can be rotated by an artificial operation from the outside of the casing by a tool or a device, and the rotation pitch angle of the plurality of turbine blades is adjusted by the rotation. .

The present invention is a power generation system including a tubular water turbine including a casing that forms a flow path, and a water turbine runner that is rotatably supported by the casing and has a plurality of water turbine blades.
A tubular turbine wheel is a turbine blade blade angle adjusting mechanism provided in a sealed internal space in the turbine wheel runner, and one of the turbine blade blades is connectable to the turbine wheel blade angle adjusting mechanism, and the other turbine wheel blade is exposed to the outside of the turbine wheel runner. An angle adjustment shaft, and
The water wheel blade angle adjustment shaft includes a pitch angle adjustment unit that adjusts the pitch angle of the water wheel blade,
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 blade pitch angle adjusting device is preset with respect to the amount of water measured every season and can be corrected. Stored in the storage means,
Season information is acquired,
The turbine 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 an operator's operation of a pitch angle adjustment unit. Provide a system.

The present invention is the above-described tubular turbine or power generation system including the tubular turbine,
A water wheel blade angle adjustment mechanism is provided on the bevel gear (A) disposed at the rotation center of the water wheel, the bevel gear (B) disposed connected to the root of the water wheel blade, and the water wheel blade angle adjustment shaft. , Each bevel gear (B) is formed by cutting out part of the tooth portion of the bevel gear so that adjacent bevel gears do not mesh with each other. A tubular turbine or a power generation system equipped with a tubular turbine is provided.

The present invention relates to a power generation method of a power generation system including a tubular water turbine including a casing that forms a flow path, and a water turbine runner that is rotatably supported by the casing and has a plurality of water turbine blades.
A tubular turbine wheel is a turbine blade blade angle adjusting mechanism provided in a sealed internal space in the turbine wheel runner, and one of the turbine blade blades is connectable to the turbine wheel blade angle adjusting mechanism, and the other turbine wheel blade is exposed to the outside of the turbine wheel runner. An angle adjustment shaft, and
The water wheel blade angle adjustment shaft includes a pitch angle adjustment unit that adjusts the pitch angle of the water wheel blade,
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 blade pitch angle adjusting device is preset with respect to the amount of water measured every season and can be corrected. Stored in the storage means,
Season information is acquired,
The tubular turbine wheel is characterized in that 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 an operator's operation of a pitch angle adjustment unit. A power generation method for a power generation system is provided.

According to the present invention, the turbine blade angle adjustment shaft can be rotated by a manual operation from the outside of the turbine runner by means of a tool or device, and by the rotation, the opening pitch angle of the plurality of turbine blades is adjusted. The pitch angle 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 adjustment unit. This makes it possible to maintain high power generation efficiency and to easily adjust the pitch angle of the turbine blades when recovering the generated power using a small river whose water volume changes greatly depending on the season. Therefore, it is possible to provide a power generation system and method capable of installing this small capacity tubular turbine.

It is a figure which shows the outline of an Example to this invention. It is a longitudinal section showing a small capacity tubular water turbine which is one embodiment of the present invention. It is sectional drawing which shows the runner boss internal structure which is one Embodiment of this invention. It is AA sectional drawing which shows the runner boss internal structure in FIG. It is a figure explaining meshing | engagement of the bevel gear (B) which is one Embodiment of this invention. It is a figure explaining the pitch angle change of the water 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 which shows the prior art example of the small capacity tubular turbine wheel with a movable turbine blade.

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

  FIG. 1 shows an outline of a power generation system 200 including a small-capacity tubular turbine (hereinafter referred to as a tubular turbine) 100 that solves the above-described problem. The application target of the power generation system 200 is a small river 50 in which the amount of water and a drop, particularly, the amount of water changes greatly depending on the season, and a tube water turbine 100 and a water amount measuring device 51 are installed in the river 50. As the water amount measuring device 51, an existing water amount measuring device can be adopted, and the installation location in the small river 50 is arbitrary.

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

  The water amount measuring device 51 measures the water amount and the drop 52 for each season. The measured data is stored 53 in advance in 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 later. In the power generation system 200, the pitch angle adjustment required 101 of the turbine blades is used.

  In addition, when power is generated by a water turbine installed in such a small river, a request 102 for reducing the price for water turbine installation is made. In this embodiment, as will be described later, a double structure in which an operation shaft provided for adjusting the turbine blade pitch angle is placed inside the main shaft is expensive and cannot be employed. That is, a double structure in which the operation shaft is placed inside the main shaft is not allowed 102.

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

  Seasonal data is acquired. Season information acquisition 92 is performed from the calendar or from data based on the judgment of the person in charge of the operation based on the rainfall amount of the year. Season information predetermined by a calendar may be adjusted based on the judgment of the person in charge of the operation. This seasonal information acquisition 92 is important for the power generation using the small river as described above because of its economical efficiency.

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

  The pitch angle is adjusted 93, and the operation 94 of the tubular turbine 100 is performed.

  Thus, the tubular water turbine 100 includes the casing that forms the flow path 10 and the water turbine runner 1 that is rotatably supported by the casing and has a plurality of turbine blades 1-1, and includes the tubular water turbine. The power generation system is configured as follows.

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

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

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

  Season information is acquired.

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

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

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

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

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

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

A tubular turbine is provided with a casing that forms a flow path, and a turbine runner that is rotatably supported by the casing and has a plurality of turbine blades.
A turbine blade blade angle adjusting mechanism provided in a runner boss formed in a turbine runner and having a sealed internal space formed;
A turbine blade angle adjusting shaft, one of which is connected to the turbine angle adjusting mechanism via a connector and the other is exposed to the outside of the turbine runner,
The turbine wheel blade angle adjustment shaft can be rotated by a manual operation by a tool or a device from the outside of the turbine wheel runner, and the rotation pitch angle of the plurality of turbine blades is adjusted by the rotation. This will be described below.

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

  A tubular turbine 100 includes a casing that forms a flow path 10 and a turbine runner 1 that is rotatably supported by the casing and has 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 structure in which a runner boss 1-2a is attached to the tip of the main shaft 5, and the runner boss 1-2 is divided into two parts, 1-2a and 1-2b. Four or five water turbine blades 1-1 are sandwiched between two runner bosses 1-2 and assembled in a rotatable manner. The shaft at the base 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 and 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 coincides with the rotation center of the water turbine runner 1, It meshes with the bevel gear (B) 1-3 attached to the water turbine blade 1-1.

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

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

  As shown in FIG. 5, the adjustment angle S of the water turbine blade 1-1 required for a drop or a change in 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. There is no meshing problem. It is possible to make the diameter of the bevel gear (A) 1-5 larger so that the teeth are not cut and removed and do not mesh with the bevel gear (B) 1-3 adjacent to each other. 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 water turbine runner 1 suitable for the small capacity tubular water turbine is obtained from the fluid calculation, there is a limit to the outer diameter of the runner boss 1-2. In the case of the angle adjustment mechanism of the water turbine blade 1-1 using a gear, the means for removing the unnecessary portion for meshing and leaving the tooth portion for transmitting the rotation angle makes the rotation mechanism in the runner boss 1-2 compact. Important in construction.

In this way, the bevel gear (A) is arranged at the center of the water turbine rotation, and the bevel gear (B) is also attached to the roots of the water wheel blades inserted into the runner boss, and attached to the roots of the water wheel blades. The bevel gear (B) is shaped so that the tooth surface of the bevel gear (B) is notched so that it does not mesh with the adjacent bevel gear (B).
The bevel gear (B) meshes with only the bevel gear (A), the bevel gear (B) is rotated by the rotation of the bevel gear (A), and the water wheel blades are rotated by the rotation of the bevel gear (B). All have the same angle of rotation in the same direction,
A 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 In order to change the rotational movement, a lever and a link are 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 rotation radius of the lever cannot be increased, and the rotational force is transmitted to the water turbine blade 1-1 with a short lever, so that a large burden is generated on the connecting pins. Therefore, strength reliability is lowered. In the present invention, since the rotation angle is transmitted by the bevel gear, the force can be transmitted smoothly, and even in a mechanism incorporated in a narrow space, the strength reliability is high.

  The bevel gear (A) 1-5 is attached to a worm speed reducer 1-4 as 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 force is generated to rotate about the axis of the turbine blade 1-1 by the water pressure applied to the turbine blade 1-1, and the couple is warmed via the bevel gear (B) 1-3. It is transmitted to the reducer 1-4. Since the worm reducer 1-4 having a relatively large reduction ratio is used, the rotational torque from the bevel gear (B) 1-3 generated by the water pressure is restricted by the self-locking function of the worm reducer 1-4. . 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 not used using a mechanism such as a brake. It becomes possible to hold. The worm speed reducer 1-4 achieves both a speed reduction function and a rotation stop function at the same time.

  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 about 5 degrees, the angle is finely adjusted. When the reduction ratio of the worm speed reducer 1-4 is set to 1/36, the rotation angle of the worm shaft is 180 degrees when the bevel gear (A) 1-5 is rotated by 5 degrees. At 2.5 degrees, it becomes 45 degrees. By setting the reduction ratio of the worm speed reducer 1-4 to 1/36, the pitch angle of the water turbine blade 1-1 after the change can be estimated only by visually confirming the rotation angle of the tool 12.

  The turbine blade angle adjustment shaft 2 is attached to the tip of the worm shaft. The rotation from the turbine wheel blade angle adjusting shaft 2 is decelerated by the worm speed reducer 1-4, and the rotation angle is transmitted to the meshed bevel gear (B) 1-3 via the bevel gear (A) 1-5. It is done. All the turbine blades 1-1 are meshed with one bevel gear (A) 1-5 via the bevel gear (B) 1-3, and thus rotate at the same angle.

  In order to make the water wheel blade angle adjusting shaft 2 easier to turn, the water wheel blade angle adjusting shaft 2 is arranged so as to be turned from the outside of the water wheel runner 1, that is, from the outside of the runner boss 1-2. As shown in FIG. 1, the runner boss 1-2 is 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. In order to rotate the turbine blade angle adjusting shaft 2 attached to the runner boss 1-2, it is necessary to remove the outer casing 3. Since removing the outer casing 3 is heavy and difficult to remove by human power, a machine for performing the operation must be prepared.

  Since the turbine blade angle adjustment shaft 2 attached to the runner boss 1-2 is rotated, a large-scale work is generated.

  In order to solve this problem, a part of the outer casing 3 is removable as an example. The water turbine blade angle adjusting shaft 2 is installed in the vertical direction as shown in the figure. The tool 12 for rotating the turbine blade blade angle adjusting shaft 2 from the removed portion can be inserted into the outer casing 3 from the vertical direction. 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, the operation is stopped, and the inspection hatch 11 is opened. A pulley that connects the generator 8 and the belt 7 is provided with a shaft, and a clutch 14 is provided on the shaft. During operation, the clutch 14 is opened, and the clutch 14 is connected when adjusting the turbine blade 1-1 so that the rotational force of the motor 15 with a speed 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 speed reducer, the direction of the turbine blade angle adjustment shaft 2 is confirmed from the inspection hatch 11, and the turbine blade blade angle adjustment shaft 2 can be operated from the outside. When it reaches a predetermined position, the motor 15 with a speed reducer is stopped.

  The tool 12 is inserted from the inspection hatch 11 toward the turbine blade angle adjustment shaft 2 and fixed. The water wheel blade angle adjusting shaft 2 is rotated while visually confirming the pitch angle of the water wheel blade 1-1 on the scale provided on the runner boss 1-2. Thereby, the turbine blade angle adjustment shaft 2 is rotated from the outside of the turbine runner 1 with the tool 12 inserted by the operator from the outside of the outer casing 3 easily in a short time, and the pitch angle of the turbine blade is adjusted. Since water pressure from the flow path 10 is generated in the inspection hatch 11, the inspection hatch 11 is securely attached so as not to cause water leakage. The water wheel blade pitch angle can be easily operated from the outside of the water wheel runner 1.

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

  FIG. 7 is a longitudinal sectional view of a mechanism for rotating a bevel gear according to an embodiment of the present invention by remote control.

  As shown in FIG. 7, a magnet 16 or the like is embedded at the tip of the 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 turbine blade 1-1 are confirmed remotely. I can do it. This system enables the turbine blade angle adjusting shaft 2 to be rotated without removing the outer casing 3, so that the turbine blade can be operated at an optimum efficiency corresponding to the flow rate and the head by stopping power generation in a short time. The pitch angle can be easily adjusted by 1-1.

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

  When it is difficult for a worker to approach the water turbine installation site due to snow or the like in winter, it is desirable to remotely adjust the pitch angle of the water turbine blade 1-1.

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

  A mechanism for attaching the automatic rotating tool device 13 to the outer casing 3 and rotating the turbine blade blade angle adjusting shaft 2 by electric or aerodynamic force to adjust the pitch angle of the target turbine blade blade 1-1 will be described. The automatic tool rotating device 13 includes a tool part 13-1 with a guide, a rod 13-2 that pushes the tool part 13 to the turbine blade blade angle adjusting shaft 2, and a speed reducer that rotates the turbine blade blade angle adjusting shaft 2 to a target rotational angle. A 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 are configured.

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

  DESCRIPTION OF SYMBOLS 1 ... Turbine runner, 1-1 ... Turbine blade, 1-2 ... Runner boss, 1-3 ... Bevel gear (B), 1-4 ... Worm gear reducer, 1-5 ... Bevel gear (A), 2 ... turbine blade angle adjustment shaft, 3 ... outer casing, 4 ... inner casing, 5 ... main shaft, 7 ... belt, 8 ... generator, 9 ... turbine blade adjustment mechanism, 9-1 ... link mechanism, 9-2 ... operation shaft DESCRIPTION OF SYMBOLS 10 ... Flow path, 11 ... Inspection hatch, 12 ... Tool, 13 ... Automatic tool rotation apparatus, 14 ... Clutch, 15 ... Motor with a reduction gear, 16 ... Magnet, 17 ... Non-contact position sensor, 51 ... Water quantity measurement , 52 ... Water volume per season, drop measurement, 53 ... Pre-accumulation as data for each season, 90 ... Solution means (IT equipment, personal computer), 91 ... Setting for each season-pitch angle relationship, 92 ... Acquisition of season information, 93 ... Adjust to pitch angle, 94. ... Tubular water turbine driving, 200 ... Power generation system with tubular water turbine.

Claims (4)

In a tubular water turbine, a tubular water turbine is provided with a casing that forms a flow path, and a turbine runner that is rotatably supported by the casing and has a plurality of turbine blades.
A turbine blade blade angle adjusting mechanism provided in a runner boss formed in a turbine runner and having a sealed internal space formed;
A turbine blade angle adjusting shaft, one of which is connected to the turbine angle adjusting mechanism via a connector and the other is exposed to the outside of the turbine runner,
The tubular turbine wheel is characterized in that the turbine blade angle adjusting shaft can be rotated by an artificial operation from the outside of the turbine runner by a tool or a device, and the rotation pitch angle of a plurality of turbine blades is adjusted by the rotation. In the power generation system including the tubular turbine, the tubular turbine includes a casing that forms a flow path, and a turbine runner that is rotatably supported by the casing and has a plurality of turbine blades.
A tubular turbine wheel is a turbine blade blade angle adjusting mechanism provided in a sealed internal space in the turbine wheel runner, and one of the turbine blade blades is connectable to the turbine wheel blade angle adjusting mechanism, and the other turbine wheel blade is exposed to the outside of the turbine wheel runner. An angle adjustment shaft, and
The water wheel blade angle adjustment shaft includes a pitch angle adjustment unit that adjusts the pitch angle of the water wheel blade,
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 blade pitch angle adjusting device is preset with respect to the amount of water measured every season and can be corrected. Stored in the storage means,
Season information is acquired,
The turbine 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 an operator's operation of a pitch angle adjustment unit. system. In the electric power generation system provided with the tubular water wheel described in claim 1 or the tubular water wheel described in claim 2,
A turbine wheel blade angle adjustment mechanism is provided on the bevel gear (A) disposed at the center of the turbine wheel, the bevel gear (B) disposed connected to the root of the turbine blade, and the turbine blade angle adjustment shaft. , Each bevel gear (B) is formed by notching a part of the tooth portion of the bevel gear so that adjacent bevel gears do not mesh with each other. A tubular water turbine or a power generation system equipped with a tubular water turbine characterized by the above. In a power generation method of a power generation system provided with a tubular turbine, the casing includes a casing that forms a flow path, and a turbine runner that is rotatably supported by the casing and has a plurality of turbine blades.
A tubular turbine wheel is a turbine blade blade angle adjusting mechanism provided in a sealed internal space in the turbine wheel runner, and one of the turbine blade blades is connectable to the turbine blade blade angle adjusting mechanism, and the other turbine blade is exposed to the outside of the turbine wheel runner. An angle adjustment shaft, and
The water wheel blade angle adjustment shaft includes a pitch angle adjustment unit that adjusts the pitch angle of the water wheel blade,
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 blade pitch angle adjusting device is preset with respect to the amount of water measured every season and can be corrected. Stored in the storage means,
Season information is acquired,
The tubular turbine wheel is characterized in that 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 an operator's operation of a pitch angle adjustment unit. A power generation method of the power generation system.

Images