JP5919590B2 - Fluid power generator - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a hydroelectric power generator using an impeller such as hydraulic power or wind power, and in particular, transmits a driving force from an impeller shaft on a driving side to a shaft of a driven generator via a winding transmission means. It is related with the mechanism to do.

  Until now, hydroelectric power generation has been mainly conducted on a large scale, which generates electricity using a large drop of water obtained by dam storage. However, even in small rivers and waterways that have been excluded from the scope of hydroelectric power generation and have a small amount of flowing water in recent years, in response to growing attention to renewable energy, these small rivers and waterways have been supported. A hydroelectric power generation apparatus using a small water wheel is installed and utilized.

  As such a small hydroelectric power generator, the impeller shaft located at the center of the impeller, that is, the impeller is vertically supported, and the impeller is positioned in the flowing water, while the generator or impeller shaft is driven from the impeller to the generator. An increasing number of mechanisms for transmitting force adopt a vertical shaft structure that is arranged on the water in consideration of maintainability and the like. An example of such a hydroelectric generator is disclosed in Japanese Patent Application Laid-Open No. 2007-177797.

JP 2007-177797 A

  A conventional hydroelectric generator has a configuration exemplified in the above-mentioned patent document, and such a small hydroelectric generator appropriately supports an impeller that rotates by receiving a water flow in a water passage that penetrates the apparatus. Therefore, the impeller shaft is supported at both ends by a plurality of bearings arranged so as to sandwich the impeller. This impeller shaft bearing needs to consider water resistance in consideration of the case where it is in contact with the water flow. Especially when the impeller is a vertical shaft type, the lower bearing among the bearings on both sides of the impeller is required. Since the water is always in the water, a structure that is not easily affected by foreign matter in the water is required. When bearings are provided in water, a slide bearing is often used that is simple in structure and less prone to troubles and is resistant to foreign matters in order to achieve smooth rotation of the shaft. However, in slide bearings, shafts and bearing materials may wear due to long-term use, resulting in excessive clearance between the sliding surfaces of the bearings.

  Such clearance in bearings on the underwater side fluctuates the impeller shaft that receives the force of the water flow, and depending on the support structure of other bearings, the impeller shaft may be inclined and the water on the impeller shaft may be shaken. Become. A mechanism for transmitting the driving force from the impeller shaft to the generator side is provided in the water portion of the hydroelectric generator, but if a winding transmission means such as a belt or a chain is used to transmit the driving force, the blade Shaking of the axle affects the tension of the transmission means. In the worst case, there is a problem that the transmission means loosens due to the shake of the impeller shaft, so that the driving force cannot be properly transmitted from the impeller shaft to the generator side, and the power generation cannot be performed properly.

  The present invention has been made to solve the above problems. Even if the bearing of the impeller shaft is worn, the displacement of the impeller shaft occurs in the direction of tensioning the transmission means, and the transmission of the driving force by the transmission means is appropriately performed. An object of the present invention is to provide a hydrodynamic power generation apparatus that is maintained and can perform power generation without any problem.

  The hydrodynamic power generation device according to the present invention is a flow that rotates an impeller with the force of a fluid flow passing through a flow passage provided through a casing and transmits power to the generator from the impeller to generate power. In the physical power generation device, an impeller shaft that is integrally attached to the impeller at the rotation center position of the impeller and is rotatably supported at predetermined positions on both sides of the flow passage portion in the casing, and the outer flow passage portion of the casing Directly attached to one end portion of the impeller shaft that is extended in the portion to be, or disposed via a speed reduction mechanism or a speed increasing mechanism, and at least rotates in conjunction with the impeller shaft The drive pulley or sprocket that is directly attached to the generator input shaft, or arranged with a speed reduction mechanism or speed increasing mechanism interposed, and at least rotating in conjunction with the input shaft A driven pulley or sprocket, an endless transmission that is wound around the drive pulley or sprocket and the driven pulley or sprocket and transmits a driving force from the drive pulley or sprocket to the driven pulley or sprocket. And a predetermined position of the casing near one end of the impeller shaft and outside the flow path portion, and supports a predetermined position of the impeller shaft between the drive pulley or sprocket and the impeller The first bearing and the first bearing are provided at a predetermined portion facing the flow passage portion of the casing on the opposite side across the flow passage portion, and support the other end portion of the impeller shaft. And the second bearing is interposed between the housing portion fixed to the casing and the other end portion of the housing portion and the impeller shaft. A bush that maintains the pivotable state of the other end of the shaft, and the first bearing allows an inclination of the impeller shaft accompanying a radial shift of an impeller shaft support position in the second bearing. The impeller shaft, the first bearing, and the second bearing are located on the upstream side in the fluid flow direction with respect to the driven pulley or sprocket.

  As described above, according to the present invention, the first bearing that supports the impeller shaft at its intermediate position allows the impeller shaft to be tilted, and the impeller shaft and the bearing thereof are more than the driven pulley or sprocket on the generator side. A drive pulley or sprocket disposed at one end of the impeller shaft when the impeller is tilted to the pushed side as the impeller is pushed by the water flow when arranged at a position upstream of the fluid flow direction Are moved away from the driven pulley or sprocket. As a result, because of the structural characteristics of the bush that functions as a bearing in the situation where it faces the flow path and contacts the fluid, the second bearing on the other end side of the impeller shaft, which is likely to be worn, is used for the impeller shaft accompanying wear. Even when the support position of the other end portion is displaced, the impeller shaft is tilted by shifting the other end portion of the shaft in the direction in which the impeller is pushed by the fluid flow due to the wear of the second bearing. The drive pulley or sprocket at one end of the impeller shaft can be displaced away from the driven pulley or sprocket to maintain the tension of the transmission means, and the transmission means even if wear on the bearing progresses. However, the generator does not fall into a state where it is difficult to transmit the driving force, and the generator is appropriately driven via the transmission means, and power can be generated without any problem.

In addition, the hydrodynamic power generation device according to the present invention may be provided with a speed reduction mechanism or speed increase that transmits to one end of the impeller shaft to the drive pulley or sprocket in a state where the speed of the speed of the impeller is reduced or increased. A mechanism is disposed so as to be rotatable relative to the impeller shaft and the casing, and the drive pulley or sprocket can be rotated on the speed reduction mechanism or the speed increasing mechanism around another axis that does not coincide with the impeller shaft. and supported by, an impeller shaft, a reduction gear mechanism or the speed increasing mechanism, the positional relationship between the drive pulley or sprocket, deceleration mechanism or the speed increasing mechanism is rotated to the impeller shaft and integrally without relative rotation with respect to the impeller shaft When rotating together, at the start of the rotation rotation , the drive pulley or sprocket on the speed reduction mechanism or speed increasing mechanism is moved away from the driven pulley or sprocket on the generator side, and the transmission means is tensioned. As a state in which Ru is, is to set the orientation of the arrangement of the reduction mechanism or the speed increasing mechanism for the impeller shaft.

  Thus, according to the present invention, the behavior of the speed reduction mechanism or speed increasing mechanism including the drive pulley or sprocket when rotating together with the shaft of the impeller is the same as that of the drive pulley or sprocket from the driven pulley or sprocket on the generator side. By setting the position of the speed reduction mechanism or speed increasing mechanism with respect to the impeller shaft in a distant arrangement, the drive pulley or sprocket and the driven pulley or sprocket are linked with the transmission means to reduce the speed as the impeller shaft rotates. As the mechanism or the speed increasing mechanism tries to rotate in the same direction, the drive pulley or sprocket tends to move away from the driven pulley or sprocket, and the transmission means wound between them is tensioned. Is always in a state where moderate tension force is applied, and it does not cause loosening of the transmission means, and the power generation means reliably generates electricity. Convey the driving force on the side, it is continuously allowed to efficiently operate the generator.

  In addition, because of the arrangement configuration of the speed reduction mechanism or speed increasing mechanism with respect to the impeller shaft, the transmission means shifts to an appropriate tension state when the impeller is activated, so that a mechanism for separately adjusting the tension of the transmission means is not required and driving The force transmission mechanism can be simplified.

1 is a perspective view of a hydrodynamic power generation apparatus according to a first embodiment of the present invention. It is a front view of the fluid power generator concerning a 1st embodiment of the present invention. It is a rear view of the fluid power generator concerning a 1st embodiment of the present invention. It is a bottom view of the fluid power generator concerning a 1st embodiment of the present invention. It is AA sectional drawing of FIG. It is an internal structure schematic explanatory drawing of the fluid power generator concerning the 1st Embodiment of this invention. It is a schematic block diagram of the impeller-shaft bearing part in the fluid power generator concerning the 1st Embodiment of this invention. It is explanatory drawing of the initial state of the impeller shaft in the hydrodynamic power generator concerning the 1st embodiment of the present invention. It is a bearing wear state explanatory view of an impeller shaft in a fluid power generator concerning a 1st embodiment of the present invention. It is a cross-sectional view of the hydrodynamic power generator according to the second embodiment of the present invention. It is an internal structure schematic explanatory drawing of the hydroelectric power generator which concerns on the 2nd Embodiment of this invention.

(First embodiment of the present invention)
Hereinafter, the driving force transmission mechanism of the hydrodynamic power generation apparatus according to the first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, an example of a hydroelectric generator that uses the force of water flow as fluid force will be described.
In each of the drawings, the hydrodynamic power generation device 1 according to the present embodiment rotates the impeller 10 with the force of the flow of water passing through the flow passage 51 provided through the casing 50, and the generator from the impeller 10 It is a small device that transmits power to 40 and generates power, and is compatible with installation in small-scale waterways such as rivers and irrigation canals.

  More specifically, the hydrodynamic power generation device 1 is mounted integrally with the impeller 10 at the rotational center position of the crossflow type impeller 10 as a driving force transmission mechanism, and is rotatably supported by the casing 50 of the power generation device. The impeller shaft 11 and the impeller shaft 11 are directly attached to the drive pulley 12 that rotates in conjunction with the impeller shaft 11 and the input shaft 41 of the generator 40. A driven pulley 42 that rotates in conjunction with the input shaft 41; and a belt 13 as a transmission means that is wound around the drive pulley 12 and the driven pulley 42 and transmits a driving force from the drive pulley 12 to the driven pulley 42. A first bearing 14 that is provided at a predetermined position of the casing 50 near one end of the impeller shaft 11 and supports the predetermined position of the impeller shaft 11 between the drive pulley 12 and the impeller 10; A configuration and a second bearing 15 which supports the other end of the impeller shaft 11 at a predetermined portion of the ring 50.

  This hydrodynamic power generation apparatus 1 is a vertical shaft type in which a generator 40 is arranged at the upper part and an impeller 10 is arranged at the lower part, and the impeller shaft 11 is vertical, and the impeller is transverse to the water flow direction. In this configuration, two generators 40 respectively driven by the respective impellers 10 are arranged side by side inside the upper portion of the casing 50.

  The hydrodynamic power generator 1 is installed in a state where the casing 50 is partially submerged in the flowing water, and the two impellers 10 arranged side by side are guided to the flow path 51 in the casing 50. Is a mechanism that rotates by receiving a water flow and operates each generator 40 with the driving force transmitted from each impeller 10 to generate electricity. Water flows from the front into the flow path portion 51 in the casing 50, rotates the two impellers 10, and then exits from the rear of the casing. On the front side of the casing 50, there is provided a throttle portion 52 that guides water to the center of the flow path 51 while narrowing the flow path on the inlet side of the flow path 51 to increase the flow rate of water. The throttle 52 serves as a kind of guide vane for each cross-flow type impeller 10.

  The impeller shaft 11 is mounted integrally with the impeller 10 at the rotation center position of the impeller 10 and is configured to be rotatably supported at predetermined positions on both sides of the casing 50 with the flow path portion 51 interposed therebetween. A predetermined length on the one end side of the impeller shaft 11 is extended and disposed on the upper portion of the casing 50 on the outer side of the flow path portion 51 in order to transmit the driving force to the generator 40.

The drive pulley 12 is directly attached to one end of the impeller shaft 11 and is configured to rotate integrally with the impeller shaft 11.
The driven pulley 42 is directly attached to the input shaft 41 of the generator 40 and is configured to rotate integrally with the input shaft 41. The driven pulley 42, together with the generator 40, is located downstream of the impeller shaft 11 in the flow direction of water as a fluid.

  The belt 13 is a so-called V-belt that is wound around the drive pulley 12 and the driven pulley 42, rotates the driven pulley 42 with the rotation of the drive pulley 12, and drives the driven pulley 42 to the driven pulley 42. The driving force is transmitted to the.

  The first bearing 14 is a known bearing such as a ball bearing and is provided at a predetermined position on the upper portion of the casing 50 near one end of the impeller shaft 11 and outside the flow path portion 51. A predetermined position of the impeller shaft 11 between the impeller 10 and the impeller 10 is supported (see FIGS. 6 and 7).

  The first bearing 14 is configured to permit the inclination of the impeller shaft 11 due to the radial displacement of the impeller shaft support position in the second bearing 15 while maintaining the rotatable state of the impeller shaft 11.

  The second bearing 15 is provided at a lower portion facing the flow path portion 51 of the casing 50 on the opposite side to the first bearing 14 across the flow path portion 51, and supports the other end portion of the impeller shaft 11. It is. The second bearing 15 is interposed between the bearing housing 15a fixed to the casing 50 side and the bearing housing 15a and the other end of the impeller shaft 11 so that the impeller shaft is in contact with water as a fluid. 11 and a bush 15b that maintains the pivotable state of the other end portion (see FIG. 7).

  Next, the belt tension adjustment state at the time of bearing wear in the hydrodynamic power generation device based on the above configuration will be described. As a premise, it is assumed that there is still no wear of each part in the start of use of the apparatus, the initial dimensional accuracy is ensured, and the belt is in an appropriate tension state without loosening.

  If the use as the power generation device is continued, the wear of the inner peripheral portion of the bush 15b and the outer periphery of the other end of the impeller shaft 11 in contact with the bush 15b are advanced by the second bearing 15 in water. With such wear, the difference between the inner diameter of the bush 15b and the outer diameter of the other end of the impeller shaft 11 is increased, so that in the second bearing 15, the impeller shaft support position, that is, the actual position of the impeller shaft 11 and the bush 15b. This is a state in which the slidable contact position may be displaced in the radial direction. In actual use, the impeller shaft support position shifts to the downstream side of the flow by the force of the water flow applied to the impeller 10 (see FIG. 9).

  In this case, since the first bearing 14 has a structure that allows the inclination of the impeller shaft 11, the impeller shaft 11 remains in a state of rotating together with the impeller 10 and the blades in the second bearing 15. As the axle support position shifts to the downstream side of the water flow, it will tilt from its original direction.

  Due to the inclination of the impeller shaft 11, one end portion of the impeller shaft 11 located at the upper part of the casing is on the upstream side of the flow of water in the flow path portion 51, opposite to the other end portion, with respect to the position of the first bearing 14. It will be in a shifted state. Due to this deviation, the driving pulley 12 attached to one end of the impeller shaft 11 is also deviated from the initial state, and the driven pulley 12 and a driven pulley positioned downstream of the impeller shaft 11 in the water flow direction. The distance from 42 is wider than in the initial state (see FIGS. 8 and 9).

  As the distance between the drive pulley 12 and the driven pulley 42 is increased in this way, the belt 13 wound around the drive pulley 12 and the driven pulley 42 is in a tension state, and the drive pulley 12 to the driven pulley 42 is moved. It is possible to maintain a state where the driving force is transmitted without any problem.

  In this way, while the water flow passing through the flow path 51 exists, the impeller shaft 11 is inclined based on the force received by the impeller 10 from the water flow, and as a result of trying to move the drive pulley 12 at one end away from the driven pulley 42, The tension state of the belt 13 is maintained, and appropriate transmission of the driving force from the driving pulley 12 to the driven pulley 42 by the belt 13 is ensured.

  As described above, in the hydrodynamic power generation device according to the present embodiment, the first bearing 14 that supports the impeller shaft 11 at its intermediate position allows the impeller shaft 11 to tilt and the driven pulley 42 is connected to the impeller shaft 11. When the impeller shaft other end is shifted to the pushed side as the impeller 10 is pushed by the water flow, and the impeller shaft 11 is inclined, the impeller shaft 11 is positioned further downstream in the water flow direction. The drive pulley 12 disposed at one end of the actuator moves in a direction away from the driven pulley 42.

  As a result, due to the structural characteristics of the bushing that functions as a bearing when it is always in water and in contact with water, the second bearing 15 is subject to wear. A state in which the dimensional accuracy cannot be maintained, and the driving force transmission by the belt 13 may be adversely affected, such as the displacement of the support position of the other end of the impeller shaft and the accompanying inclination of the impeller shaft 11 and displacement of the drive pulley position. However, the impeller shaft 11 allowed to be tilted by the first bearing 14 is tilted by shifting the other end of the shaft in the direction in which the impeller 10 is pushed by the water flow due to the wear of the second bearing 15. The drive pulley 12 at one end of the impeller shaft 11 is rotated in a direction away from the driven pulley 42 and can be rotated while maintaining the tension of the belt 13. Without falling into difficult state tell it loose driving force, the generator 40 is properly driven, it allows continued to without generating a problem.

(Second embodiment of the present invention)
A hydrodynamic power generation apparatus according to a second embodiment of the present invention will be described with reference to FIGS. Also in this embodiment, an example of a hydroelectric power generation apparatus that uses the force of water flow as fluid force will be described.
In each of the drawings, the hydrodynamic power generation device according to the present embodiment has the impeller shaft 21, the drive pulley 23, the driven pulley 42, the belt 24, and the first as a driving force transmission mechanism, as in the first embodiment. A speed increasing mechanism 22 is provided at one end portion of the impeller shaft 21 to transmit the rotation of the impeller 20 to the drive pulley 23 in a state where the rotation speed is increased while one bearing 25 and the second bearing 26 are provided. The drive pulley 23 is rotatably supported on the speed increasing mechanism 22.
The configuration other than the speed increasing mechanism 22 and the driving pulley 23 supported by the speed increasing mechanism is the same as in the first embodiment, and detailed description thereof is omitted.

The speed increasing mechanism 22 is a mechanism that transmits to one end portion of the impeller shaft 21 to the drive pulley 23 in a state where the rotation of the impeller 20 is increased, and is arranged to be rotatable relative to the impeller shaft 21. On this speed increasing mechanism 22, the drive pulley 23 is supported so as to be rotatable around another shaft (output shaft) that does not coincide with the impeller shaft 21.
The speed increasing mechanism 22 is a known mechanism that increases the rotation of the impeller shaft 21 that is an input shaft through a built-in gear train, transmits the speed to the output shaft, and rotates the drive pulley 23 on the output shaft. Detailed description will be omitted.

  When the impeller shaft 21 rotates, the speed increasing mechanism 22 has a resistance due to friction or the like inside the mechanism unless a predetermined restraining force is applied to the speed increasing mechanism 22 from the outside. It will be in the state of rotating together with the impeller shaft 21 without rotating.

  The positional relationship between the speed increasing mechanism 22 and the impeller shaft 21 and the drive pulley 23 is such that the speed increasing mechanism 22 rotates integrally with the impeller shaft 21 without being restricted by the belt 24 being wound around. Assuming that the speed increasing mechanism 22 with respect to the impeller shaft 21 is moved away from the driven pulley 42 on the generator 40 side as the speed increasing mechanism 22 starts rotating. The orientation of the arrangement is set.

  More specifically, for example, when the rotation direction of the impeller 20 and the impeller shaft 21 is clockwise when viewed from above the device, the impeller shaft 21 and the power generation are viewed from the side where the impeller shaft 21 is in front of the generator 40. The impeller shaft 21 of the speed increasing mechanism 22 in a state where the belt 24 is wound so that the center of the drive pulley 23 on the speed increasing mechanism 22 is positioned in the region on the right side of the line connecting the input shaft 41 of the machine 40. The direction with respect to is set (see FIG. 10).

  Next, the belt tension adjustment state at the time of driving force transmission in the hydrodynamic power generation device based on the above configuration will be described. As a premise, the belt 24 is wound in a predetermined tension state between the drive pulley 23 on the speed increasing mechanism 22 and the driven pulley 42 on the generator 40 side at the start of use of the device, and the pulley 24 It is assumed that the belt 24 does not fall off.

  When water is introduced into the flow path portion 51 of the casing 50 and the impeller 20 starts to rotate, the speed increasing mechanism 22 that is not fixed to the casing side tries to rotate together with the rotation of the impeller shaft 21 to increase the speed. The drive pulley 23 on the mechanism 22 also rotates together to move away from the driven pulley 42 on the generator side.

  Thus, as the speed increasing mechanism 22 and the drive pulley 23 rotate in the same direction as the impeller shaft 21 rotates, the drive pulley 23 tries to move away from the driven pulley 42, and the belt 24 wound between them. Will be tense. The drive pulley 23 is stopped from rotating around the impeller shaft 21 by the restraint by the belt 24, whereby the speed increasing mechanism 22 is also restricted from rotating, and the impeller shaft 21 rotates relative to the speed increasing mechanism 22. The state shifts to a state where the rotation of the impeller shaft 21 is transmitted to the drive pulley 23 while increasing the speed.

  While the rotation of the drive pulley 23 is transmitted to the driven pulley 42 via the belt 24 and the generator 40 is driven to generate power, the speed increasing mechanism 22 is coupled with the impeller shaft 21 while being restrained by the presence of the belt 24. Since a state where a predetermined torque is generated to rotate does not change from the beginning of the rotation of the impeller shaft 21, an appropriate tension is always applied to the belt 24, and while the impeller shaft 21 rotates, the belt 24 is rotated. The generator 40 can be reliably driven via the belt 24 and the generator 40 can generate power efficiently.

  In addition, when the impeller 20 is activated, the belt 24 is shifted to an appropriate tension state only by the arrangement of the speed increasing mechanism 22 with respect to the impeller shaft 21, thereby providing a mechanism for adjusting the tension of the belt 24. A transmission mechanism for the driving force from the impeller shaft 21 to the generator 40 can be simplified without being separately required.

  Further, even when the wear of each part of the second bearing underwater has progressed over a long period of use, the one end part of the impeller shaft located at the upper part of the casing due to the inclination of the impeller shaft 21 as in the first embodiment. Is in a state shifted to the upstream side of the flow of water in the flow path portion 51 (see FIG. 9), the belt 24 can be maintained in a tensioned state by widening the distance between the driving pulley 23 and the driven pulley 42, The transmission of the driving force from the driving pulley 23 to the driven pulley 42 by the belt 24 is ensured.

  Thus, in the driving force transmission mechanism of the hydrodynamic power generation device according to the present embodiment, the movement of the speed increasing mechanism 22 including the driving pulley 23 when rotating together with the impeller shaft 21 is caused by the driving pulley 23 being a generator. Since the drive pulley 23 and the driven pulley 42 are interlocked by the belt 24 while setting the position of the speed increasing mechanism 22 with respect to the impeller shaft 21 in an arrangement that is in a state of being away from the driven pulley 42 on the side, the rotation of the impeller shaft 21 is performed. As the speed increasing mechanism 22 tries to rotate in the same direction, the drive pulley 23 tends to move away from the driven pulley 42, and the belt 24 wound between them is tensioned. With moderate tension applied, the belt 24 will not loosen, and even if the belt stretches over time, it will absorb the stretch and maintain tension. , Convey the driving force reliably to the generator side in the belt 24 is continuously allowed to efficiently operate the generator 40.

  In the hydrodynamic power generation apparatus according to each of the embodiments described above, the transmission means is a belt, the mechanical element that transmits the driving force from the impeller shaft or the speed increasing mechanism to the belt is a driving pulley, and the driving force is transmitted from the belt to the input shaft of the generator. However, the drive element is not limited to this, and the transmission means is a chain, and the drive sprocket is used to transmit the driving force from the impeller shaft or the speed increasing mechanism to the chain. It is also possible to employ a configuration in which driven sprockets are used to transmit the driving force to each. Even when such a chain is used, the driving sprocket at one end portion of the impeller shaft is displaced away from the driven sprocket so that the tension of the chain can be maintained, and the chain is loosened so that the driving force is not easily transmitted. Without falling into a state, the generator 40 can be appropriately driven to continue power generation.

  Further, in the fluid power generation device according to each of the embodiments, the driven pulley 42 is directly attached to the input shaft 41 of the generator 40, and the driving force transmitted from the impeller side is decelerated or accelerated from the driven pulley 42. However, the present invention is not limited to this, and a speed reduction mechanism or speed increasing mechanism is interposed between the driven pulley and the input shaft 41 of the power generator 40 to reduce or increase the rotation of the driven pulley. It can also be set as the structure which transmits to the generator 40 in the speed state. In this case, in order to prevent the position of the driven pulley rotatably supported on the speed reduction mechanism or speed increase mechanism from changing and the tension of the transmission means such as a belt from changing to the loose side, the speed reduction mechanism or speed increase The mechanism is preferably provided in a state of being fixed to the casing.

  Further, in the hydrodynamic power generation device according to each of the above embodiments, the generator 40 is disposed on the upper portion of the casing 50, the impeller 10 is positioned in the flow path portion 51 on the lower side thereof, and the impeller shaft 11 is oriented vertically. Although it is configured as a vertical shaft type, the present invention is not limited to this, and a horizontal shaft type configuration in which a driving force transmission mechanism such as a driving pulley is arranged at a position on the outer side of the flow path section and on the side of the impeller is not limited to this. The layout of the device can be appropriately selected according to the situation of the installation location of the power generation device including the river and water channel, the shape of the power generator, and the like.

  In addition to the application to the one that rotates the cross-flow type impeller 10 by the force of the flow of fluid through the flow path 51, it passes through the open space portion instead of the flow path as a closed region. Fluid that is applied to the impeller blades or runners that are pivotally supported by the casing, including Pelton turbines, open upper suspension turbines, and open lower suspension turbines that rotate the impeller with the force of the fluid flow reaching the impeller It can also be applied to other hydrodynamic power generators that generate power by rotating the impeller with the force of the flow and transmitting the driving force from the impeller to the generator. The drive pulley or sprocket of the generator moves in a direction away from the driven pulley or sprocket on the generator side, or the drive pulley or sprocket on the speed reduction mechanism or the speed increasing mechanism with respect to the rotating impeller shaft By setting the orientation of the speed reduction mechanism or speed increasing mechanism so that it is away from the sprocket, the belt is not loosened as in the previous embodiment, and it is reliably driven to the generator side. The power can be transmitted and the generator can be operated continuously and efficiently.

  Furthermore, in the hydroelectric power generation apparatus according to each of the above embodiments, the structure uses a water flow force as the fluid force. However, the present invention is not limited to this, and has properties as a liquid other than water, a gas, or a kind of fluid. The flow force of a large amount of granular materials or the like, or the flow force of any two or three mixed-phase flows of gas, liquid, and solid can be used. Power can be received by the impeller to rotate the impeller, and the obtained driving force can be transmitted to the generator for efficient power generation.

DESCRIPTION OF SYMBOLS 1 Fluid power generator 10, 20 Impeller 11, 21 Impeller shaft 11a Opening part 12, 23 Drive pulley 13, 24 Belt 14, 25 First bearing 15, 26 Second bearing 15a Bearing housing 15b Bush 22 Speed increasing mechanism 40 Power generation Machine 41 Input shaft 42 Driven pulley 50 Casing 51 Channel section 52 Throttle section

Claims (2)

In the hydrodynamic power generation device that rotates the impeller with the force of the flow of fluid passing through the flow path provided through the casing and transmits the driving force from the impeller to the generator to generate power,
An impeller mounted integrally with the impeller at the rotational center position of the impeller, and supported rotatably at predetermined locations on both sides of the flow passage portion in the casing;
It is directly attached to one end portion of the impeller shaft that is extended and disposed on a portion that is outside the flow path portion of the casing, or is disposed with a speed reduction mechanism or a speed increasing mechanism interposed, and at least the impeller shaft A driving pulley or sprocket which is in a state of rotating in conjunction with it;
A driven pulley or a sprocket that is directly attached to the input shaft of the generator, or is disposed with a speed reduction mechanism or a speed increasing mechanism interposed, and is in a state of rotating in conjunction with at least the input shaft;
An endless transmission means arranged to be wound around the driving pulley or sprocket and the driven pulley or sprocket, and transmitting a driving force from the driving pulley or sprocket to the driven pulley or sprocket;
A first shaft is provided at a predetermined position of the casing near one end of the impeller shaft and outside the flow path portion, and supports a predetermined position of the impeller shaft between the drive pulley or sprocket and the impeller. Bearings,
The first bearing is provided at a predetermined portion facing the flow passage portion of the casing on the opposite side across the flow passage portion, and includes a second bearing that supports the other end portion of the impeller shaft,
A housing portion fixed to the casing; and a bushing interposed between the housing portion and the other end portion of the impeller shaft to maintain a rotatable state of the other end portion of the impeller shaft. Have
The first bearing is configured to allow the inclination of the impeller shaft accompanying the radial shift of the impeller shaft support position in the second bearing,
The hydrodynamic power generation device, wherein the impeller shaft, the first bearing, and the second bearing are located upstream of the driven pulley or sprocket in a fluid flow direction. In the fluid power generation device according to claim 1,
At one end of the impeller shaft, a speed reduction mechanism or speed increasing mechanism for transmitting the rotation of the impeller to the drive pulley or sprocket in a state where the rotation of the impeller is decelerated or increased is arranged to be rotatable relative to the impeller shaft and the casing. And
The drive pulley or sprocket is supported on the speed reduction mechanism or speed increasing mechanism so as to be rotatable around another axis that does not coincide with the impeller shaft,
An impeller shaft, a reduction gear mechanism or the speed increasing mechanism, the positional relationship between the drive pulley or sprocket, the deceleration mechanism or the speed increasing mechanism is rotated together with rotation to the impeller shaft and integrally without relative rotation with respect to the impeller shaft , at the start of the rotation both around, so that the state of Ru is tensioned transmission means a drive pulley or sprocket on the speed reduction mechanism or the speed increasing mechanism away from the driven pulley or sprocket on the generator side, the deceleration mechanism for the impeller shaft Or the direction of arrangement | positioning of a speed-up mechanism is set, The fluid power generator characterized by the above-mentioned.

Images