JP2007120461A - Vertical shaft valve type hydraulic power generation equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide vertical shaft valve type hydraulic power generation equipment capable of improving efficiency of a water wheel by suppressing generation of a swirl, and capable of preventing vibration and noise. <P>SOLUTION: This equipment is provided with the vertical shaft valve water wheel having a water wheel shaft and a generator shaft perpendicularly arranged, a vertical flow passage 10 having the vertical valve water wheel arranged therein and making water flow to the vertical direction, a horizontal flow passage 13 positioned on an upper part of the vertical flow passage 10 and making the water flow to the vicinity of a water guide port 10a of the vertical flow passage 10 in the horizontal direction, and a horizontal straightening plate 15 arranged almost on a level with the water in the vicinity of the water surface near the water guide port 10a of the vertical flow passage 10 wherein horizontal flow of the horizontal flow passage 13 is shifted to the vertical flow. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an upright valve water turbine power generation facility including an upright valve water turbine in which a water wheel shaft and a generator shaft are arranged in a vertical direction.

  A vertical shaft water turbine is a hydroelectric power generation facility in which a water wheel shaft is disposed in a direction along vertical water flow, and a generator is disposed in flowing water. FIG. 22 is a plan view of the vertical valve turbine power generation equipment applied to a low head, and FIG. 23 is a longitudinal sectional view of the vertical valve turbine power generation equipment.

  As shown in FIG. 23, the vertical valve water turbine is configured such that a generator is housed in an egg-shaped valve 1 and a runner 5 is provided at the end. The runner 5 includes a plurality of runner vanes 5a and runner bosses 5b. The runner boss 5b holds the runner vanes 5a. The vertical valve water turbine is disposed in the vertical flow path 10. Inside the egg-shaped valve 1, a generator having a generator stator 2 and a generator rotor 3 as main constituent members is incorporated, and a main shaft 4 is coupled to the generator rotor 3, and the main shaft A runner 5 is attached to the tip of 4.

  A plurality of guide vanes 6 for adjusting the flow rate are arranged on the upstream side of the runner 5 and are interlocked with a gate ring 7 located on the outer peripheral portion by a link mechanism. Further, a support member called a stay 8 for supporting the valve 1 is provided radially upstream from the main body of the valve 1 toward the outer wall of the vertical channel 10. Further, inspection ports 9 for inspecting the inside of the generator are respectively provided at the upper part and the lower part (not shown) of the valve 1, and this is also one of important structures that support the valve 1.

  The direction of water flow during operation of the water turbine is indicated by arrows in FIGS. 22 and 23. Water flows from the free water surface 16 at the top of the horizontal channel 13 to the water inlet 10a that is the inlet of the vertical channel 10. The water guided to the inside of the vertical channel 10 flows downward so as to surround the valve 1 at the center of the vertical channel 10, is rectified by the guide vane 6, and is guided to the runner 5. The water that has worked in the runner 5 flows out to the suction pipe 11 located downstream thereof and is led to the lower pond.

  Here, since the vertical axis valve turbine power generation equipment is applied to a point having a relatively low head, the distance from the free water surface 16 at the upper part of the horizontal flow path 13 to the water inlet 10a that is the inlet of the vertical flow path 10. L is shorter than Francis turbines. In addition, since the amount of water flowing in the water turbine is relatively large compared to a Francis turbine, etc., a rope-like air suction with a strong swirling called a suction vortex from the channel surface to the water turbine when operating the water turbine. A vortex 12 is generated locally.

As a vertical shaft type water turbine power generation facility that suppresses the generation of vortex flow, one end of the rectifying rod is fixedly supported on the upper surface of the valve that houses the generator, and the other end of the rectifying rod projects into the water channel to generate power. There is one that extends to the ceiling and is fixedly supported by the ceiling to suppress the influence of eddy currents that can be generated toward the water turbine (see, for example, Patent Document 1).
JP 2005-163563 A

  However, this vortex flow 12 is generated by the fact that water is suddenly sucked from the horizontal flow channel to the vertical flow channel 10 which is the water turbine flow channel by the operation of the water turbine. It occurs continuously from the water surface to the water turbine without interruption. For this reason, a great loss is generated in the water turbine due to this eddy current, or an unstable phenomenon of the horizontal flow path water surface 16 occurs, the water turbine operation state fluctuates, and vibrations and noises also occur in the operation of the turbine main machine and other equipment. Cause serious problems.

  In addition, this vortex is considered to be closely related to the shape of the flow path through which water flows, and in the case of a vertical valve turbine, when there is a turbulent flow in the vicinity of the transition from the horizontal flow path 13 to the vertical flow path 10 Amplifies the flow in the swirling direction and grows as a vortex. In addition, when a significant fluctuation of the water surface occurs, the water flow is disturbed and a vortex is developed.

  As a means for avoiding this eddy current, a valve turbine is installed so as to increase the distance L between the water inlet 10a of the vertical channel and the water surface of the horizontal channel 13 for guiding water to the vertical valve turbine. Are the most effective, but these conditions lead to increased power plant construction costs. In general-purpose pumps, as a means for avoiding such suction vortex, optimization of the suction pipe shape and suction device for preventing swirling flow have been considered, but such a thing has been proposed for a vertical shaft water turbine. Not.

  As described above, in the vertical shaft water turbine power generation facility, the air suction vortex generated by the water turbine operation is generated toward the water turbine on the water surface forming the water channel of the water turbine. The vortex deteriorates the turbine performance, and the generation of the vortex causes the turbine operation state to become unstable, causing problems such as vibration and noise. Since the vertical valve turbine is a turbine applied to the low head region, even a relatively small loss is a large one that cannot be ignored from the viewpoint of the turbine loss expressed as a ratio to the effective head.

  An object of the present invention is to provide an upright valve water turbine power generation facility capable of improving the efficiency of a water turbine by suppressing the generation of eddy currents and preventing the generation of vibration and noise.

  The vertical valve water turbine power generation facility according to the present invention includes a vertical valve water turbine in which a water wheel shaft and a generator shaft are arranged in a vertical direction, a vertical flow path in which the vertical valve water turbine is arranged to flow water in a vertical direction, and the vertical direction A horizontal flow path portion that is located above the flow path and flows water in the horizontal direction to the vicinity of the water flow inlet of the vertical flow path, and a water flow inlet of the vertical flow path where the horizontal flow of the horizontal flow path changes to a vertical flow A horizontal rectifying plate is provided in the vicinity of the nearby water surface so as to be substantially horizontal to the water surface.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to lengthen the distance of the water flow inlet of a vertical flow path and the free water surface of a horizontal flow path with a baffle plate, it can prevent that the water surface of a water flow inlet upper surface fluctuates. Therefore, even if a turbulent flow exists in the flow in the horizontal flow path 13, the eddy current is not developed by providing this rectifying plate. As a result, the efficiency of the water turbine can be improved and the generation of vibration and noise can be prevented.

(First embodiment)
FIG. 1 is a plan view of a vertical valve turbine power generation facility according to the first embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the vertical valve turbine power generation facility according to the first embodiment of the present invention. This first embodiment is substantially the same as the water surface near the water inlet near the water inlet of the vertical flow path where the horizontal flow of the horizontal flow path shifts to the vertical flow, compared to the conventional example shown in FIGS. A horizontal rectifying plate 15 is provided so as to be horizontal. The same elements as those of the conventional example shown in FIGS. 22 and 23 are denoted by the same reference numerals, and redundant description is omitted.

  In the first embodiment, a vertical flow that is an upper pond of the vertical valve turbine is provided in the vertical flow passage 10 of the vertical valve turbine configured to surround an inner cylinder called a valve 1 that houses the generator. A horizontal rectifying plate 15 is installed in the vicinity of the water surface 16 of the water inlet 10a for taking water from the channel 13 so as to be substantially horizontal to the water surface.

The horizontal rectifying plate 15 in the horizontal direction is for increasing the distance from the water inlet 10a to the free water surface 16 on the upper surface of the horizontal flow path 13, and suppresses fluctuation of the water surface. In the vertical valve water turbine in which the vertical distance between the water inlet 10a and the horizontal flow path water surface 16 is extremely short, an air suction vortex is likely to be generated, but it is accelerated when a turbulent flow exists in the flow path, and the water surface is shaken. It is considered that the generation of eddy currents is further accelerated when
The rope-like vortex generated in the upper part of the vertical flow channel 10 that is the flow channel of the vertical valve turbine is triggered by a large amount of water suddenly flowing from the suction pipe 11 of the vertical valve turbine to the downstream discharge channel. The water surface above the water inlet 10a of the vertical flow channel 10 is likely to generate water surface waviness due to water inflow conditions from the upstream flow channel and weather conditions such as wind and water surface fluctuations due to operation of the water turbine. This phenomenon is caused by repeated occurrence of a high and low water surface, so that a turbulent flow is generated and a vortex is developed.

  In the first embodiment, the horizontal rectifying plate 15 increases the distance between the water inlet 10a and the free water surface 16 of the horizontal flow path 13. Therefore, it is possible to prevent the water surface on the upper surface of the water inlet 10a from changing. it can. Moreover, even if a turbulent flow exists in the flow in the horizontal flow path, the vortex flow is not developed by providing the horizontal rectifying plate 15. Regarding the size of the horizontal rectifying plate 15, when the maximum width of the vertical flow passage 10 of the vertical shaft water turbine is Ds, the length of each side forming the horizontal rectifying plate 15 is at least the maximum width. By having a length of 1.5 times or more of Ds, a greater effect can be exhibited.

  Since the horizontal rectifying plate 15 can sufficiently exhibit its function when it floats on the water surface 16, it does not need to be particularly strong so long as it can satisfy water resistance. Although not shown in FIGS. 1 and 2, the horizontal rectifying plate 15 can be installed near the water surface by being provided with a float, and can also be stopped from the power plant building by a wedge or the like. is there.

  According to the first embodiment of the present invention, it is possible to prevent the generation of vortices only by installing the horizontal rectifying plate 15, so that it is possible to easily improve the efficiency of the water turbine at low cost and to generate vibration and noise. Can be prevented. Further, since the horizontal rectifying plate 15 can contribute to the prevention of the turbine output fluctuation phenomenon caused by the water level fluctuation phenomenon within a short time, particularly in a low-head turbine, the stable turbine operation can be provided.

(Second Embodiment)
FIG. 3 is a plan view of the vertical valve turbine power generation facility according to the second embodiment of the present invention, and FIG. 4 is a longitudinal sectional view of the vertical valve turbine power generation facility according to the second embodiment of the present invention. In the second embodiment, in contrast to the first embodiment shown in FIGS. 1 and 2, the horizontal rectifying plate is provided with a communication port 15a penetrating the upper and lower surfaces. The same elements as those in the first embodiment shown in FIG. 1 and FIG.

  In order to take water from the horizontal flow path 13 corresponding to the upper pond of the vertical valve water turbine into the vertical flow path 10 of the vertical valve water turbine configured to surround the inner cylinder called the valve 1 that houses the generator inside. A horizontal rectifying plate 15 is installed near the water surface 16 of the water inlet 10a. The horizontal rectifying plate 15 is provided with a communication port 15a penetrating in the plate thickness direction.

  The horizontal rectifying plate 15 has a role of preventing the wavy phenomenon of the water surface near the water inlet 10a and rectifying and equalizing the flow of the horizontal flow path portion 13. Further, the communication port 15a penetrating between the upper and lower surfaces of the horizontal rectifying plate 15 is made the same as the water pressure directly below the horizontal rectifying plate 15 and the external atmospheric pressure (atmospheric pressure), so that the entire horizontal rectifying plate 15 is directed in the direction of the water turbine during the water turbine operation. This is to prevent the generation of force to be sucked. The size of the communication port 15a is not particularly limited, but is desirably about 0.1 × Ls with respect to the size Ls of the horizontal rectifying plate.

  In the above description, the case where the horizontal rectifying plate 15 is provided with the communication hole 15a has been described. However, as shown in FIGS. 5 and 6, the horizontal rectifying plate 15 is configured as a combination structure of rectifying pieces 15b, The water pressure just below 15 and the atmospheric pressure (atmospheric pressure) may be the same.

  As shown in FIG. 5, a rectifying plate frame 15c forming a rectifying plate is formed into a skeleton shape, and a plurality of long rectifying pieces 15b are parallel to two opposite sides of the rectifying frame 15c. It is provided as follows. Although it is not necessary to specifically limit the interval between the adjacent rectifying pieces 15b, an interval of about 0.1 × Ls with respect to the size Ls of the horizontal rectifying plate 15 is desirable. In addition, in FIG. 5, although the elongate rectification | straightening piece 15b is comprised so that it may become parallel with flowing water, even if it is a structure in the direction which crosses flowing water, the function of the original horizontal rectifying plate 15 is not impaired. . As described above, even in the horizontal rectifying plate 15 having the skeleton shape shown in FIGS. 5 and 6, the water pressure just below the horizontal rectifying plate 15 and the external atmospheric pressure can be made the same.

  According to the second embodiment, in addition to the effects of the first embodiment, it is possible to prevent the generation of a force that the horizontal rectifying plate 15 is attracted to the water turbine side during the operation of the water turbine. Water level conditions can be provided. Moreover, since the weight reduction of the horizontal rectifying plate 15 can be achieved, the maintainability is excellent and the reliability can be improved.

(Third embodiment)
FIG. 7 is a plan view of an upright valve turbine power generation facility according to the third embodiment of the present invention, and FIG. 8 is a longitudinal sectional view of the upright valve turbine power generation facility according to the third embodiment of the present invention. In the third embodiment, a support device 14 for supporting the horizontal rectifying plate on the power plant building 20 is provided with respect to the second embodiment shown in FIGS. 5 and 6. The same elements as those of the second embodiment shown in FIGS. 5 and 6 are denoted by the same reference numerals, and redundant description is omitted.

  In order to take water from the horizontal flow path 13 corresponding to the upper pond of the vertical valve water turbine into the vertical flow path 10 of the vertical valve water turbine configured to surround the inner cylinder called the valve 1 that houses the generator inside. A horizontal rectifying plate 15 is disposed in the horizontal direction on the water surface of the water inlet 10a. Then, the horizontal rectifying plate 15 is supported and fixed by the support device 14 from near the ceiling of the power plant building 20 located above the horizontal rectifying plate 15.

  The role of the horizontal rectifying plate 15 is to increase the distance from the water inlet 10a to the free water surface 16 and to stabilize the flow of the horizontal flow path 13 before flowing into the water inlet 10a. In particular, the water flow is stabilized by preventing the undulation phenomenon of the water surface 16 caused by disturbance, and the vortex generated due to the non-uniformity of the water flow is prevented.

  For this reason, it is necessary to always hold the horizontal rectifying plate 15 at a position near the water surface 16 above the water inlet 10a of the vertical shaft water turbine. For this reason, it supports from a power plant building so that an installation position may not change with the flow of water.

  In the above description, the horizontal rectifying plate 15 is supported and fixed to the power plant building 20 by the support device 14, but the position of the horizontal rectifying plate 15 is adjusted in conjunction with the height of the water surface 16 of the horizontal flow path 13. May be. As shown in FIGS. 9 and 10, a water level gauge 17 that detects the height of the water surface 16 of the horizontal flow path 13, a lifting device 18 that raises and lowers the horizontal rectifying plate 15, and the height of the water surface 16 of the horizontal flow path 13. A horizontal rectifying plate position adjusting device comprising a control device 21 for driving the lifting device 18 and adjusting the position of the horizontal rectifying plate 15 is provided. And the height of the water surface 16 of the horizontal flow path 12 is measured by the water level meter 17 provided to the power plant, and the control device 21 is adjusted to the optimum position according to the height of the water surface 16 by the lifting device 18 by the horizontal rectifying plate. 15 can be moved up and down.

  In this way, a stable water flow in the horizontal flow path 13 can always be established by moving the horizontal rectifying plate 15 up and down in conjunction with the water surface height of the horizontal flow path that varies depending on the operation state of the water turbine or the amount of river water. .

  Since the horizontal rectifying plate 15 is installed in the vicinity of the water surface, the undulation phenomenon of the water surface can be prevented, so the installation holding position accuracy of the horizontal rectifying plate 15 is not required and it is not necessary to move it frequently in a short period. Therefore, complicated control is unnecessary. Further, although the horizontal rectifying plate 15 itself is heavy, there is an advantage that the lifting device 18 does not need to have a large capacity because the buoyancy of water is assisted by being present in the water.

  According to the third embodiment, the horizontal rectifying plate 15 is always held at a position near the water surface 16 at the upper part of the water inlet 10a of the vertical shaft water turbine, so that the undulation phenomenon of the water surface 16 can be prevented and the flow of water is stabilized. The vortex generated by the non-uniform water flow can be prevented. Further, since the horizontal rectifying plate 15 is moved up and down in conjunction with the water surface height of the horizontal flow path, a stable water flow in the horizontal flow path 13 can be established at all times.

(Fourth embodiment)
FIG. 11 is a longitudinal sectional view of a vertical shaft valve turbine power generation facility according to a fourth embodiment of the present invention, and FIG. 12 is a characteristic diagram showing an example of the correlation between the turbine output and the turbine flow rate (flow channel surface height). FIG. 13 is a flowchart showing the processing contents of the horizontal rectifying plate position adjusting device according to the fourth embodiment of the present invention. As shown in FIG. 11, there is provided a horizontal rectifying plate position adjusting device comprising a lifting device 18 that raises and lowers the horizontal rectifying plate 15 and a control device 21 that drives the lifting device 18 and adjusts the position of the horizontal rectifying plate 15. The horizontal rectifying plate is lowered to the water surface of the horizontal flow path when the water surface height of the road reaches a height for generating a vortex.

  The horizontal rectifying plate 15 in the horizontal direction is provided in the vicinity of the water surface of the water inlet 10a of the vertical flow channel 10 for taking water from the horizontal flow path 13 corresponding to the upper pond of the vertical axis valve turbine. The control device 21 of the horizontal rectifying plate position adjusting device stores a correlation characteristic curve between the turbine output and the turbine flow rate (flow channel surface height) shown in FIG. 12, and the turbine flow rate obtained from the operating conditions of the vertical valve turbine is shown. And the horizontal flow path water surface height, the lifting device 18 is driven to move the horizontal rectifying plate 15 up and down.

  As described above, in the vertical valve water turbine, the distance L from the water inlet 10a of the vertical flow channel 10 to the water surface 16 of the horizontal flow channel 13 is related to whether or not a vortex is generated. The height of the water surface 16 of the horizontal flow path 13 is determined by the amount of river water flowing into the horizontal flow path 13 and the operating conditions of the vertical axis valve turbine.

  FIG. 12 is a characteristic diagram showing an example of the interrelationship between the turbine output and the turbine flow rate (the height of the water surface 16 of the horizontal flow path 13) during the turbine operation by the vertical valve turbine. FIG. 12 shows the characteristic that the output of the water turbine increases, the water turbine flow rate increases, and the height of the water surface 16 of the horizontal flow path 12 decreases. In this example, it is shown that when the height of the water surface 16 of the horizontal flow path 13 is lowered to 80% of the steady state, a vortex is generated from the water surface 16 of the horizontal flow path 13. This eddy current generation prediction point is created based on information obtained in advance by a simulation experiment using a simple model.

  FIG. 13 is a flowchart showing the processing contents of the position setting control of the horizontal rectifying plate 15 in the control device 21 of the horizontal rectifying plate position adjusting device. That is, when there is an operation command for the vertical valve turbine (S1), the guide vane opening of the vertical valve turbine is adjusted, and the turbine flow rate is adjusted so that the output of the vertical valve turbine becomes the required turbine output (S2). . Then, it is determined whether or not the adjusted flow rate of the water turbine has reached the height of the water surface 16 of the horizontal flow path 13 that generates the vortex (S3), and becomes the height of the water surface 16 of the horizontal flow path 13 that generates the vortex. When this happens, the horizontal rectifying plate 15 is lowered to the water surface 16 of the horizontal flow path 13 (S4). On the other hand, when it is not the height of the water surface 16 of the horizontal flow path 13 that generates the vortex, the operation is performed without lowering the horizontal rectifying plate 15 (S5).

  In this way, when the occurrence of vortex is predicted by determining the relationship between the water turbine flow rate as shown in FIG. 12 and the height of the water surface 16 of the horizontal flow path in advance, The horizontal rectifying plate 15 is lowered. That is, the scheduled operation process of the vertical shaft valve turbine is incorporated in the position setting control of the horizontal rectifying plate 15.

  According to the fourth embodiment, the condition for operating the vertical valve water turbine is set as the control condition for the horizontal rectifying plate 15 in advance, thereby accurately following the change in the height of the water surface 16 of the horizontal flow path 13 due to the water turbine operation. Can be made. For this reason, even if it is the area | region where air suction eddy current was estimated to develop, this generation | occurrence | production can be avoided.

(Fifth embodiment)
FIG. 14 is a plan view of an upright valve turbine power generation facility according to the fifth embodiment of the present invention, and FIG. 15 is a longitudinal sectional view of the upright valve turbine power generation facility according to the fifth embodiment of the present invention. The fifth embodiment is a vertical direction in which the horizontal flow of the horizontal flow path 13 is shifted to the vertical flow in place of the horizontal rectifying plate 15 with respect to the first embodiment shown in FIGS. 1 and 2. A vertical rectifying plate 19 is arranged in the vertical direction so as to surround the vertical flow path 10 in the vicinity of the water surface near the water inlet 10a of the flow path 10. The same elements as those in the first embodiment shown in FIG. 1 and FIG.

  As shown in FIGS. 14 and 15, the vertical flow straightening plate 19 in the vertical direction so as to surround the water inlet 10 a of the vertical channel 10 in the horizontal channel 13 near the water inlet 10 a of the vertical channel of the vertical shaft water turbine. Is provided. The vertical rectifying plate 19 is provided so as to open one portion on the upstream side of the flow and close the other three sides so as to surround the water inlet 10a of the vertical shaft valve turbine. And it is formed in the shape which becomes symmetrical in the left-right direction with respect to the flow of a horizontal direction on the boundary of the center line of the flow direction of the standing direction flow path 10 of a vertical shaft water turbine.

  A dedicated flow path of the vertical valve water turbine is formed so that the rebound water when the water collides with the outer wall 13a of the horizontal flow path 13 does not affect the water turbine. For this reason, the upper surface position of the vertical rectifying plate 19 is also configured to be higher than the horizontal flow path water surface 16.

  Here, if the shape of the outer wall 13a forming the horizontal flow path 13 is symmetrical with respect to the center of the vertical valve turbine as a means for equalizing the flow around the vertical valve turbine, the turbulent flow can be suppressed. It is possible to prevent the generation of eddy currents, but in reality these are all civil engineering structures and are determined from the surrounding location conditions and environmental conditions. For this reason, in general, it is designed and manufactured from a viewpoint different from the installation of the vertical shaft water turbine, and it is not possible to sufficiently satisfy the requirements in consideration of the vortex generation prevention viewpoint. In that respect, in the fifth embodiment, the vertical rectifying plate 19 can be dealt with by limiting it to a specific region around the vertical axis valve turbine, and therefore has the advantage that it can be handled as a category of turbine design and manufacture.

  According to the fifth embodiment, since the vertical flow straightening plate 19 is provided to form the dedicated flow path of the vertical valve water turbine, eddy currents caused by problems such as uneven flow path shape can be prevented.

(Sixth embodiment)
FIG. 16 is a plan view of a vertical valve turbine power generation facility according to the sixth embodiment of the present invention, and FIG. 17 is a longitudinal sectional view of the vertical valve turbine power generation facility according to the sixth embodiment of the present invention. This sixth embodiment is a rectifying movable plate that is movable up and down according to the water surface height of the horizontal flow path 13 above the vertical rectifying plate 19 with respect to the fifth embodiment shown in FIGS. 14 and 15. 19a is provided. The same elements as those in the fifth embodiment shown in FIGS. 14 and 15 are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIGS. 9 and 10, the vertical flow straightening plate 19 in the vertical direction so as to surround the water inlet 10 a of the vertical flow path 10 in the horizontal flow path 13 near the water inlet 10 a of the vertical flow path of the vertical shaft water turbine. A rectifying movable plate 19 a is provided on the vertical rectifying plate 19. And in addition to this rectifying movable plate 19a, a water level meter 17 for detecting the height of the water surface 16 of the horizontal flow path 13, a lifting device 18 for raising and lowering the rectifying movable plate 19a, and driving the lifting device 18 to drive the rectifying movable plate 19a. A horizontal rectifying plate position adjusting device comprising a control device 21 for adjusting the position is provided. The rectifying movable plate 19 a is driven by the lifting device 18 by the control device 21 so as to be at the water surface position detected by the water level gauge 17, and moves up and down according to the height of the water surface 16 of the horizontal flow path 13.

  That is, a rectifying movable plate 19a is provided on an upper portion of a vertical rectifying plate 19 having three sides provided so as to cover and surround the water inlet 10a of the vertical shaft water turbine, and the rectifying movable plate 19a is provided on the ceiling portion of the power plant building 20. It is movable up and down according to the change of the water surface by a dedicated lifting device 18 installed in the water. The measurement of the height of the water surface is detected by a water level gauge 17 provided in the power plant, and the lifting device 18 is driven by the control device 21.

  Originally, the vertical rectifying plate 19 will function by being provided up to a position higher than the water level. However, when the amount of water in the river changes greatly according to the season, and the fluctuation of the water level is severe, The position of the vertical rectifying plate 19 may be lower than the water level. Therefore, the sixth embodiment can be applied even in such a case. That is, when the vertical rectifying plate 19 has a height corresponding to a state where the amount of water in the river is the least and the water level is low, and the amount of river water increases and the height of the water level increases significantly, The rectifying movable plate 19a provided at the top and bottom is moved up and down. In the above description, the dedicated lifting device 18 is used to move in the vertical direction. However, a crane installed at a power plant can be used without a special lifting device 18.

  According to the sixth embodiment, since the rectifying movable plate 19a provided on the upper part of the vertical rectifying plate 19 can be moved up and down, the rectifying movable plate 19a is raised even if the amount of water in the river increases and the water surface height increases. Can prevent eddy currents. Therefore, not only the reduction of the efficiency of the water turbine caused by the eddy current but also the vibration and noise can be prevented.

(Seventh embodiment)
FIG. 18 is a plan view of an upright valve turbine power generation facility according to the seventh embodiment of the present invention, and FIG. 19 is a longitudinal sectional view of the upright valve turbine power generation facility according to the seventh embodiment of the present invention. This seventh embodiment is different from the fifth embodiment shown in FIGS. 14 and 15 in that a protrusion 19b is provided on the surface of the vertical rectifying plate 19 facing the vertical flow path 10. .

  As shown in FIGS. 18 and 19, a vertical flow straightening plate 19 is provided in the horizontal flow path 13 near the water inlet 10 a of the vertical flow path 10 of the vertical valve water turbine so as to surround the water inlet 10 a of the vertical flow path 10. ing. A protrusion 19 b is provided on the surface of the vertical rectifying plate 19 facing the vertical flow path 10 to suppress interference between the ripples before and after the collision of the water flow of the horizontal flow path 13 with the wall surface of the vertical rectifying plate 19. The shape of the protrusion 19b is, for example, a conical shape, and more effectively suppresses interference between ripples before and after the collision with the wall surface of the water flow.

  In the above description, the protrusion 19b is provided in the entire area of the wall surface of the vertical rectifying plate 19, but as shown in FIGS. 20 and 21, the protrusion 19b is provided in a limited area near the water surface where interference ripples occur. The part 19b may be provided.

  According to the seventh embodiment, the protrusion 19b of the vertical rectifying plate 19 suppresses the shaking caused by the collision when the water flow reaches the wall surface of the vertical rectifying plate 19, so that turbulent flow can be prevented. Further, in the case of the conical protrusion 19b, the shape is effective for canceling the interference ripples, so that the swirl direction flow remaining in the horizontal flow path 13 can be suppressed.

The top view of the vertical axis | shaft valve-wheel turbine power generation equipment concerning the 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. The top view of the vertical-axis valve | bulb water turbine power generation equipment concerning the 2nd Embodiment of this invention. The longitudinal cross-sectional view of the vertical axis | shaft water turbine power generation equipment concerning the 2nd Embodiment of this invention. The top view which shows another example of the vertical-axis valve | bulb water turbine power generation equipment concerning the 2nd Embodiment of this invention. The longitudinal cross-sectional view which shows another example of the vertical-axis valve | bulb water turbine power generation equipment concerning the 2nd Embodiment of this invention. The top view of the vertical-axis valve | bulb water turbine power generation equipment concerning the 3rd Embodiment of this invention. The longitudinal cross-sectional view of the vertical axis | shaft water turbine power generation equipment concerning the 3rd Embodiment of this invention. The top view of the other example of the vertical-axis valve | bulb water turbine power generation equipment concerning the 3rd Embodiment of this invention. The longitudinal cross-sectional view of other examples of the vertical axis | shaft valve-wheel turbine power generation equipment concerning the 3rd Embodiment of this invention. The longitudinal cross-sectional view of the vertical axis | shaft water turbine power generation equipment concerning the 4th Embodiment of this invention. The characteristic view which shows an example of correlation with a turbine output and a turbine flow rate (flow-path water surface height). The flowchart which shows the processing content of the horizontal rectifying plate position adjustment apparatus in the 4th Embodiment of this invention. The top view of the vertical-axis valve | bulb water turbine power generation equipment concerning the 5th Embodiment of this invention. The longitudinal cross-sectional view of the vertical-axis valve | bulb water turbine power generation equipment concerning the 5th Embodiment of this invention. The top view of the vertical-axis valve | bulb water turbine power generation equipment concerning the 6th Embodiment of this invention. The longitudinal cross-sectional view of the vertical axis | shaft water turbine power generation equipment concerning the 6th Embodiment of this invention. The top view of the vertical-axis valve | bulb water turbine power generation equipment concerning the 7th Embodiment of this invention. The longitudinal cross-sectional view of the vertical-axis valve | bulb water turbine power generation equipment concerning the 7th Embodiment of this invention. The top view which shows another example of the vertical-axis valve | bulb water turbine power generation equipment concerning the 7th Embodiment of this invention. The longitudinal cross-sectional view which shows another example of the vertical-axis valve | bulb water turbine power generation equipment concerning the 7th Embodiment of this invention. The top view of the conventional vertical axis | shaft valve turbine power generation equipment. The longitudinal cross-sectional view of the conventional vertical axis | shaft valve turbine power generation equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Valve, 2 ... Generator stator, 3 ... Generator rotor, 4 ... Main shaft, 5 ... Runner, 5a ... Runner vane, 5b ... Runner boss, 6 ... Guide vane, 7 ... Gate ring, 8 ... Stay, 9 ... Inspection port, 10 ... Vertical channel, 10a ... Water inlet, 11 ... Suction pipe, 12 ... Air suction vortex, 13 ... Horizontal channel, 13a ... Horizontal channel outer wall, 14 ... Support device, 15 ... Horizontal rectifying plate, 15a ... Communication port, 15b ... Rectification piece, 15c ... Rectification plate frame, 16 ... Water surface of horizontal flow path, 17 ... Water level gauge, 18 ... Lifting device, 19 ... Vertical rectification plate, 19a ... Rectification movable plate, 19b ... Projection , 20 ... Power plant building, 21 ... Control device

Claims (10)

  A vertical valve water turbine in which a water turbine shaft and a generator shaft are arranged in a vertical direction, a vertical flow channel in which the vertical valve water turbine is arranged to flow water in a vertical direction, and the vertical direction located above the vertical flow channel A horizontal flow path portion for flowing water in the horizontal direction to the vicinity of the water inlet of the flow path, and a horizontal surface near the water surface near the water inlet near the water inlet of the vertical flow path where the horizontal flow of the horizontal flow path changes to a vertical flow. A vertical shaft water turbine power generation facility comprising a horizontal rectifying plate arranged to be   The vertical shaft water turbine power generation facility according to claim 1, wherein the horizontal rectifying plate includes a communication port penetrating the upper and lower surfaces.   2. The horizontal rectifying plate includes a horizontal rectifying plate frame forming an outer frame, and a plurality of rectifying pieces provided in parallel to two sides of the horizontal rectifying plate frame. Vertical shaft valve turbine power generation equipment.   The vertical shaft water turbine power generation facility according to any one of claims 1 to 3, further comprising a support device for supporting the horizontal rectifying plate on a power plant building.   4. The vertical shaft turbine turbine generator according to claim 1, further comprising a horizontal rectifying plate position adjusting device that adjusts a position of the horizontal rectifying plate in conjunction with a water surface height of the horizontal flow path. Facility.   6. The horizontal rectifying plate position adjusting device according to claim 5, wherein the horizontal rectifying plate is lowered to the water surface of the horizontal flow path when the water surface height of the horizontal flow path is high enough to generate a vortex. Vertical shaft water turbine generator.   A vertical valve water turbine in which a water turbine shaft and a generator shaft are arranged in a vertical direction, a vertical flow channel in which the vertical valve water turbine is arranged to flow water in a vertical direction, and the vertical direction located above the vertical flow channel A horizontal flow path section for flowing water in the horizontal direction to the vicinity of the water inlet of the flow path, and a vertical flow path in the vicinity of the water surface near the water inlet of the vertical flow path where the horizontal flow of the horizontal flow path changes to a vertical flow. A vertical shaft water turbine power generation facility comprising a vertical rectifying plate arranged in a vertical direction so as to surround it.   The vertical shaft water turbine power generation facility according to claim 7, wherein a rectifying movable plate that is vertically movable according to a water surface height of the horizontal flow path is provided on an upper portion of the vertical rectifying plate.   The vertical shaft water turbine power generation facility according to claim 7, wherein a projection is provided on a surface of the vertical rectifying plate facing the vertical flow path.   The vertical shaft water turbine power generation facility according to claim 9, wherein the protrusion is provided on a water surface side of the vertical rectifying plate.

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