JP2014163238A - Power generating spiral turbine and manufacturing method thereof, and power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generating spiral turbine that can be easily manufactured.SOLUTION: A hydroelectric generator 1 has an introduction part 4 installed in a water channel part 2, and a turbine part 5. The introduction part 4 guides and supplies water to an inlet 53 of the turbine part 5. The introduction part 4 adjusts a direction of flowing water supplied to the turbine part 5. The introduction part 4 contributes to improvement in efficiency. The turbine part 5 has a plurality of helical tubes 51. The turbine part 5 is called as a helical turbine or Archimedes turbine. A receiving bucket 52 receives water supplied from the introduction part 4 and supplies it to the plurality of helical tubes 51. The helical tubes 51 are provided by winding a pipe having a soft resin rib. The pipe having the rib is deformed in such a way that its cross section in a longitudinal direction of the turbine part becomes an elliptical shape. With this arrangement, there is provided the hydroelectric generator 1 of which manufacturing is easy and its maintenance work is easy.

Description

  The present invention relates to a power generation spiral turbine, a method for manufacturing the same, and a power generation apparatus.

  Patent Documents 1-3 disclose a so-called spiral turbine and a hydroelectric generator using the so-called spiral turbine. As a spiral turbine, an open turbine and a closed turbine are known. In an open type turbine, spiral blades are arranged in a partially cylindrical inclined water channel, and the spiral blades rotate. On the other hand, in a closed type turbine, spiral blades are fixed inside a cylinder, and both the cylinder and the blades rotate. The closed-type turbine has the advantage of less scattering of water and less foreign matter biting.

  Spiral turbines are also called Archimedes turbines. Spiral turbines are used in hydroelectric generators with relatively small flow rates and low heads. Moreover, since the structure is relatively simple, it is suitable as a small-scale hydroelectric generator installed in a small waterway such as agricultural water.

JP 2006-194228 A JP 2011-074808 A JP 2011-149341 A

  When configuring a closed type turbine, it is necessary to fix a spiral member made of metal or resin inside a cylinder made of metal or resin. However, in order to manufacture a spiral member with a metal plate or a resin plate, many cutting operations and joining operations are required. Furthermore, many joining operations are required in the operation of fixing the spiral member inside the cylinder. As a result, it has been difficult to provide an inexpensive spiral turbine.

  In addition, many joints are liable to be corroded and broken, thereby reducing the durability of the apparatus. The low durability makes it difficult to supply power stably and reduces the reliability of the device. Low durability also increases operational costs.

  Furthermore, when a conventional closed type turbine fails, rejoining work may be required. However, an operator who can perform the joining work is required. Further, depending on the installation site of the spiral turbine, the joining work may be difficult. For this reason, it was difficult to quickly repair and quickly restart power generation.

  In addition, since the conventional spiral turbine only flows water at the inlet, there is a problem that the flow velocity at the inlet cannot be sufficiently utilized.

  From such a viewpoint, further improvements are required for the spiral turbine and the power generation apparatus using the spiral turbine.

  One of the objects of the invention is to provide a power generation spiral turbine and a power generation apparatus that are easy to manufacture.

  Another object of the invention is to provide a helical turbine for power generation and a power generation apparatus having excellent durability.

  Another object of the invention is to provide a power generating spiral turbine, a manufacturing method thereof, and a power generating device that can be easily maintained at the installation site of the spiral turbine.

  Another object of the invention is to provide a spiral turbine for power generation and a power generation apparatus having high efficiency.

  Another object of the invention is to provide an easy method for producing a power generating spiral turbine.

  The present invention employs the following technical means to achieve the above object. It should be noted that the reference numerals in parentheses described in the claims and in this section indicate the correspondence with the specific means described in the embodiments described later as one aspect, and the technical scope of the present invention It is not limited.

  The disclosed helical turbine for power generation has a core member (55) extending along the rotation axis (AX), an inlet opening (51a) fixed to the core member (55) and receiving a fluid, and the rotation axis A spiral tube (51) extending spirally from the inlet opening (51a) along the rotation axis (AX) around (AX). According to this configuration, the spiral tube is fixed to the core member. Since the helical passage is provided by the helical tube to function as a helical turbine, the helical passage can be easily manufactured.

  In one embodiment, the helical tube (51) is made of a soft material. According to this configuration, the processing of the spiral tube is easy.

  In one embodiment, a plurality of spiral tubes (51) can be provided. According to this configuration, a large rotational torque is obtained because a plurality of helical tubes are arranged.

  In one embodiment, the spiral tube (51) includes a plurality of plate-like portions (86) having a predetermined strength in the bending direction in a cross section orthogonal to the length direction of the spiral tube (51), and a plurality of plate-like portions. And a cross-sectional deformation part (85) that extends along the length direction of the helical tube (51) and is more easily deformed in the bending direction than the plate-like part. According to this structure, the cross section orthogonal to the longitudinal direction of the helical tube can be adjusted to a desired shape.

  In one embodiment, the plate-like portion (86) and the cross-section deforming portion (85) extend spirally along the length direction of the helical tube (51). According to this structure, a cross section can be adjusted to a desired shape, without adding a twist to the raw material pipe | tube which provides a helical tube.

  In one embodiment, the spiral tube (51) is formed by a ribbed pipe (81) having a rib (83) extending along the circumferential direction, and the cross-section deformed portion (85) is formed in the rib (83). Formed by the cuts (84) made. According to this configuration, the spiral passage can be formed by using the ribbed pipe.

  The invention of the power generation apparatus includes the power generation spiral turbine (5) and a power generator (6) connected to the power generation spiral turbine.

  In the invention of the method for manufacturing a power generation spiral turbine, a first step of preparing a raw material pipe (81) made of a soft material and a raw material pipe are arranged along a core member (55) extending along a rotation axis (AX). Thus, a spiral tube (51) extending spirally along the rotation axis (AX) around the rotation axis (AX) is formed, and a second step of fixing the material tube to the core member is provided. According to this invention, the helical turbine for power generation can be manufactured by the raw material pipe | tube made from a soft material. Since the material tube made of a soft material is easily deformed, a power generation spiral turbine can be easily manufactured.

  In one embodiment, the first step includes a plurality of plate-like portions (86) having a predetermined strength in the bending direction in a cross section perpendicular to the length direction of the material pipe (81), and a plurality of plate-like portions. And forming a cross-section deformed portion (85) in the material tube that extends along the length direction of the material tube (81) and is more easily deformed in the bending direction than the plate-like portion.

It is a perspective view which shows the hydraulic power unit which concerns on 1st Embodiment of invention. It is a perspective view which shows the hydraulic power unit of 1st Embodiment. It is a side view showing the hydroelectric generator of a 1st embodiment. It is a top view which shows the hydraulic power unit of 1st Embodiment. It is a front view which shows the hydroelectric generator of 1st Embodiment. It is a perspective view which shows the electric power generation machine part of 1st Embodiment. It is a side view which shows the electric power generation machine part of 1st Embodiment. It is a perspective view which shows the turbine part of 1st Embodiment. It is a front view which shows the turbine part of 1st Embodiment. It is sectional drawing in FIG. 9XX line of the turbine part of 1st Embodiment. It is sectional drawing in FIG. 10XI-XI line of the turbine part of 1st Embodiment. It is a perspective view which shows the raw material pipe | tube of 1st Embodiment. It is a partial expansion perspective view which shows the surface of the raw material pipe | tube of 1st Embodiment. It is a partial expansion perspective view which shows the end surface of the raw material pipe | tube of 1st Embodiment. It is a perspective view which shows the turbine part which concerns on 2nd Embodiment of invention. It is a perspective view which shows the turbine part which concerns on 3rd Embodiment of invention.

  A plurality of modes for carrying out the invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Further, in the following embodiments, the correspondence corresponding to the matters corresponding to the matters described in the preceding embodiments is indicated by adding reference numerals that differ only by one hundred or more, and redundant description may be omitted. . Not only combinations of parts that clearly show that combinations are possible in each embodiment, but also combinations of the embodiments even if they are not explicitly stated unless there is a problem with the combination. Is also possible.

(First embodiment)
(Constitution)
1 to 5, a hydroelectric generator 1 provides a spiral turbine type generator that uses a fluid. The hydroelectric generator 1 is installed in the water channel part 2. The hydroelectric generator 1 includes a frame 3, an introduction unit 4, and a turbine unit 5. The hydroelectric generator 1 is installed in a small water quantity, low head water channel section 2 such as an irrigation channel. The hydroelectric power generation facility 1 provides a small-scale power generation device.

  The water channel portion 2 forms an upper water channel 21 and a lower water channel 22. The water channel portion 2 forms a sudden drop between the upper water channel 21 and the lower water channel 22. The lower water channel 22 provides a drainage unit that receives and drains water discharged from the turbine unit 5. The frame 3 is fixedly installed in the water channel portion 2. The frame 3 positions the turbine unit 5 at a predetermined position of the water channel unit 2.

  The introduction unit 4 is fixedly installed in the upper water channel 21. The introduction part 4 may be fixed to the frame 3. The introduction unit 4 guides the water in the upper water channel 21 to the inlet 53 of the turbine unit 5. In the illustrated example, the introduction unit 4 guides the entire amount flowing through the water channel unit 2 to the inlet 53 of the turbine unit 5. The introduction unit 4 includes a filtration net 41 constructed so as to cross the upper water channel 21. The filtration net 41 removes foreign matters. Only a part of the mesh of the filtration net 41 is shown in the drawing. The introduction unit 4 has a weir plate 42 that guides the water flow in the upper water channel 21 and deflects the direction of the water flow. The weir plate 42 is provided by two plates. The upstream edge of the weir plate 42 defines an upstream end opening 43. The downstream edge of the weir plate 42 defines a downstream end opening 44. The distance between the weir plates 42 gradually decreases from the upstream end opening 43 toward the downstream end opening 44. The downstream end opening 44 is positioned to face the inlet 53.

  The turbine part 5 is formed in a substantially cylindrical shape. The turbine unit 5 provides a spiral turbine. The turbine unit 5 is also called a water turbine unit. The turbine unit 5 has an inlet 53 at the front end and a plurality of outlets 54 at the rear end. The turbine unit 5 receives water from the inlet 53 and discharges water from the outlet 54. The turbine unit 5 has a rotation axis AX. The entire turbine unit 5 can rotate around the rotation axis AX. The inlet 53 is positioned at the top of the head. The outlet 54 is positioned at the bottom of the head. The turbine unit 5 is disposed in the water channel unit 2 with its rotation axis AX inclined. The frame 3 is configured to define an inclination angle of the rotation axis AX of the turbine unit 5.

  The turbine unit 5 includes a plurality of spiral tubes 51 that spirally extend around the rotation axis AX. Each spiral tube 51 provides a spiral passage that spirally extends around the rotation axis AX along the length direction of the rotation axis AX. The plurality of spiral tubes 51 contribute to obtaining a large rotational torque. In the illustrated example, the turbine unit 5 includes four spiral tubes 51.

  The turbine unit 5 includes a receiving bucket 52 that receives water. The receiving bucket 52 is a cylindrical member. The receiving bucket 52 is disposed so as to protrude in the axial direction from the spiral tube 51. The receiving bucket 52 is disposed around the rotation axis AX so as to surround the inlet opening 51a. The tip of the receiving bucket 52 provides a water inlet 53. Therefore, the introduction unit 4 guides the fluid toward the receiving bucket 52. At the base end of the receiving bucket 52, a plurality of inlet openings 51a of the plurality of spiral tubes 51 are positioned and open. In the illustrated example, four inlet openings 51 a are positioned inside the receiving bucket 52.

  As shown in FIG. 5, the center line GC of the downstream end opening 44 is positioned slightly biased to one side from the center line FC of the inlet 53 of the turbine unit 5. The center line GC is biased to the right in the figure from the center line FC.

  A plurality of spiral tubes 51 are opened in the inlet 53 of the turbine unit 5. The inlet opening 51a of the spiral tube 51 changes in the traveling direction of the rotational direction RD as the turbine unit 5 rotates in the rotational direction RD. Water can flow in when the inlet opening 51 a of the spiral tube 51 is located below the inlet 53. Furthermore, water can flow into the spiral tube 51 even in the region where the opening of the spiral tube 51 moves from the bottom to the top. In particular, when the inlet opening 51a is located in a semicircular region where the inlet opening 51a moves from the bottom to the top, the spiral tube 51 can easily receive water. In other words, out of the inlet openings 51a of the plurality of spiral tubes 51, one or more inlet openings 51a located in the above-described region can easily receive water.

  The introduction unit 4 supplies water while biasing the fluid so that the fluid is directly applied to the inlet opening 51a in the region where the inlet opening 51a moves from bottom to top. Therefore, the introduction unit 4 supplies a large amount of water to the spiral tube 51 that easily accepts water. As a result, the water that has passed through the introduction unit 4 does not accumulate in the receiving bucket 52 but flows into the spiral tube 51 while maintaining the flow rate.

  When water flows into the spiral tube 51, torque in the rotational direction RD is generated in the spiral tube 51 due to the impact of the water flow. Therefore, a large rotational torque can be obtained by allowing water having a high flow rate to flow into the spiral tube 51. According to this configuration, the water flow flowing into the spiral tube 51 is effectively converted into a rotational force.

  The turbine unit functions as an Archimedean turbine by water held in the plurality of spiral tubes 51. In addition to this, the introduction part 4 makes it possible to convert the impact of flowing water into rotational torque. For this reason, the efficiency of the turbine part 5 is improved. The introduction unit 4 and the receiving bucket 52 provide an introduction mechanism that guides fluid from the upper water passage 21 to the inlet opening 51 a of the spiral tube 51.

  As illustrated in FIGS. 6 and 7, the hydroelectric generator 1 includes a generator 6 and a connecting portion 7. The generator 6 and the connecting portion 7 are disposed on the rotation axis AX of the turbine portion 5. The generator 6 is fixedly supported on the frame 3. The generator 6 can include a substation circuit for adjusting and transmitting the generated power. The connecting part 7 operatively connects the turbine part 5 and the generator 6. The connecting part 7 transmits the rotational force obtained by the turbine part 5 to the generator 6.

  The connecting part 7 includes a shaft 71 connected to the turbine part 5. The shaft 71 extends through the turbine unit 5. The shaft 71 is supported on the frame 3 by two bearings provided at both ends of the shaft 71. The connecting portion 7 has a transmission 72 that speeds up the rotation obtained in the turbine portion 5. The connecting portion 7 has a joint 73 that connects the output shaft of the transmission 72 and the generator 6. The transmission 72 is fixed to the frame 3. The transmission 72 is provided between the turbine unit 5 and the generator 6.

  8 to 11, the turbine unit 5 includes a plurality of spiral tubes 51, a receiving bucket 52, and a core member 55. The core member 55 is a cylindrical member made of metal or resin. The core member 55 provides a winding core around which the spiral tube 51 is wound. The core member 55 provides a support member for positioning and fixedly supporting the spiral tube 51.

  The spiral tube 51 has an inlet opening 51 a that opens at the proximal end of the receiving bucket 52. The plurality of spiral tubes 51 provide a plurality of inlet openings 51 a at the proximal end of the receiving bucket 52. The inlet opening 51a is opened in an orthogonal plane orthogonal to the rotation axis AX. All the plurality of inlet openings 51a are open in the orthogonal plane. In the inlet opening 51a, the inner surface of the spiral tube 51 extending spirally is visible.

  The plurality of spiral tubes 51 have the same shape. The plurality of spiral tubes 51 are arranged in the circumferential direction on the core member 55, that is, around the rotation axis AX. Each spiral tube 51 extends spirally around the rotation axis AX. The spiral tube 51 extends spirally on the core member 55. In the illustrated example, the spiral tube 51 extends in the clockwise direction from the inlet opening 51a. The spiral tube 51 extends over an angular range that exceeds at least one revolution. In the illustrated example, the helical tube 51 extends over an angular range of approximately 450 degrees.

  The plurality of spiral tubes 51 are fixed to the core member 55. The plurality of spiral tubes 51 can be bonded onto the core member 55 with an adhesive. The plurality of spiral tubes 51 may be fastened on the core member 55 by bolts or screws. Further, the plurality of spiral tubes 51 may be fastened on the core member 55 by a U-shaped fitting or a fastening band.

  The plurality of spiral tubes 51 are densely arranged on the core member 55. The plurality of spiral tubes 51 are arranged on the core member 55 such that two adjacent spiral tubes 51 are in contact with each other in both the circumferential direction and the axial direction.

  FIG. 9 shows the turbine section 5 viewed along the arrow XI shown in FIG. The four inlet openings 51 a located in the inlet 53 are arranged so as to equally divide the circular inlet 53. Each inlet opening 51 a is substantially fan-shaped on the outside of the core member 55. In the example shown in the drawing, one inlet opening 51a opens in an angle range of 90 degrees. The inlet opening 51a is opened in an orthogonal plane orthogonal to the rotation axis AX. Therefore, the inlet opening 51a is long open along the circumferential direction around the rotation axis AX. For this reason, the inlet opening 51a can introduce water from the receiving bucket 52 over a long period of time. The inlet opening 51a has a shape obtained by cutting the spiral tube 51 in an orthogonal plane orthogonal to the rotation axis AX.

  FIG. 10 shows a cross section taken along line XX shown in FIG. As illustrated, the plurality of spiral tubes 51 are densely stacked along the axial direction of the turbine unit 5. As shown in the drawing, the spiral tube 51 has an oval cross-section perpendicular to the length direction and having a long axis in the radial direction of the rotation axis (AX). The spiral tube 51 has a flat surface at a contact portion with another adjacent spiral tube 51. The spiral tube 51 has a curved surface on the inner side facing the core member 55. The spiral tube 51 has a curved surface on the outer side facing the radially outer side of the turbine unit 5. A plurality of peaks provided by the curved surfaces of the plurality of spiral tubes 51 extend spirally on the radially outer surface of the turbine unit 5. In addition, a plurality of valleys formed between adjacent spiral tubes 51 extend in a spiral manner on the radially outer surface of the turbine unit 5.

  The oval cross section is effective for increasing the amount of water that can be held in the spiral tube 51. From another viewpoint, the oval cross section has few corners. For this reason, it is effective for suppressing adhesion and accumulation of foreign substances, algae and the like, and suppressing corrosion and breakage.

  The receiving bucket 52 is fitted on the outside of the plurality of spiral tubes 51. The receiving bucket 52 covers only the outer sides of the tip portions of the plurality of spiral tubes 51. The receiving bucket 52 contributes to positioning the plurality of spiral tubes 51 at predetermined positions. The cylindrical member that provides the receiving bucket 52 may cover the plurality of spiral tubes 51 over a longer range. An adhesive or caulking agent is filled between the receiving bucket 52 and the spiral tube 51 and between the spiral tube 51 and the core member 55. The receiving bucket 52 functions as a buffer that temporarily stores water flowing into the spiral tube 51.

  FIG. 11 shows a cross section taken along line XI-XI shown in FIG. In the cross section perpendicular to the rotation axis AX, the spiral tube 51 has the same cross-sectional shape as the inlet opening 51a. The spiral tube 51 is in contact with the outer surface of the core member 55 over almost the entire length thereof. The spiral tube 51 is in intimate contact with other adjacent spiral tubes 51 over substantially the entire length thereof. As described above, the adjacent spiral tubes 51 are closely arranged in contact with each other with respect to the axial direction and the circumferential direction of the rotation axis AX.

  FIG. 12 shows a material tube 81 for manufacturing the spiral tube 51. The material pipe 81 is a flexible pipe that can be bent without breaking the wall in the length direction. The wall of the material pipe 81 is mainly formed of a soft material. It can be said that the material pipe 81 is made of a soft material. Here, the softness refers to the softness that can be wound around the core member 55 while elastically deforming and / or plastically deforming the material pipe 81. In the winding process described later, the material pipe 81 is wound around the core member 55 only by hand, by hand using a tool, or by machine. Therefore, the soft material enables the material pipe 81 to be wound around the core member 55 without causing the wall to break. In a desirable form, the material tube 81 is flexible enough to allow a person to wrap around the core member 55.

  The soft material can be provided by a resin such as soft vinyl chloride, silicone, nylon, rubber, or a composite material, or a metal such as an aluminum alloy or iron. In the illustrated example, the material pipe 81 is made of resin. Therefore, the helical tube 51 is also made of resin. In this embodiment, the material pipe 81 is made of a transparent resin. The use of the transparent resin allows the inside of the spiral tube 51 to be visually checked and allows easy maintenance management.

  The material pipe 81 has a wall surface portion 82 that provides a cylindrical wall. The wall surface portion 82 has a thickness that allows deformation of the material tube 81 when a person winds the material tube 81 around the core member 55. Further, the material pipe 81 has a reinforcing rib 83 provided as a reinforcing part for maintaining the cross-sectional shape thereof. The reinforcing rib 83 protrudes radially outward from the wall surface portion 82. The reinforcing rib 83 extends spirally along the length direction of the material tube 81. The reinforcing rib 83 is made of the same material as the wall surface portion 82. The thickness of the reinforcing rib 83 in the radial direction is larger than the wall surface portion 82.

  The material pipe 81 is also called a ribbed hose, a reinforcing hose, a bellows hose, or the like. The material pipe 81 can be obtained on the market. The reinforcing rib 83 may be provided by a dissimilar material that protrudes outside the wall surface portion 82. For example, the reinforcing rib 83 can be provided by a hard resin that is harder than the resin material that provides the wall surface portion 82 or a metal material.

  As shown in FIGS. 12 and 14, the material pipe 81 has a plurality of cuts 84 formed in the reinforcing rib 83. The notch 84 provides a partial low strength portion to the reinforcing rib 83. The notch 84 facilitates deformation of the material pipe 81 at the position of the notch 84. The notch 84 facilitates deformation of the cross-sectional shape of the material pipe 81.

  The plurality of cuts 84 are arranged so as to be arranged in a spiral shape along the axial direction of the material tube 81, that is, the length direction. A plurality of cuts 84 arranged along one spiral provides a cross-sectional deformation portion 85. The cross-section deforming portion 85 is formed so as to extend spirally along the axial direction of the material tube 81. The angle of the spiral provided by the cross-section deforming portion 85 is set based on the spiral angle of the spiral tube 51. That is, when the material tube 81 is wound around the core member 55, the cross-sectional deformation portion 85 is formed in the material tube 81 so that the cross-sectional deformation portion 85 is positioned at a predetermined position.

  The cross-section deforming portion 85 provides a portion that is more easily deformed than the reinforcing rib 83 in an orthogonal cross section orthogonal to the length direction of the material pipe 81. The cross-section deforming portion 85 defines a fold line that easily allows deformation of the cross-sectional shape of the material pipe 81. The cross-section deforming portion 85 defines a planned bend line that is planned to deform the cross-sectional shape of the material pipe 81 into the cross-sectional shape of the spiral pipe 51. The material pipe 81 is formed with a plurality of cross-sectional deformation portions 85 in an orthogonal cross section. In the illustrated example, six cross-sectional deformation portions 85 are formed in the orthogonal cross section of the material pipe 81.

  Between the cross-section deforming portions 85, plate-like portions 86 that are more difficult to deform than the cross-section deforming portions 85 are formed. The plate-like portion 86 extends in a strip shape along the length direction of the material tube 81. In other words, the material tube 81, that is, the spiral tube 51 includes a plurality of plate-like portions 86 having a predetermined strength with respect to the bending direction in a cross section orthogonal to the length direction of the spiral tube 51. Since the plate-like portion 86 has a plurality of reinforcing ribs 83 extending along the circumferential direction, the plate-like portion 86 is less likely to be deformed than the cross-section deforming portion 85 in the circumferential direction. The material tube 81, that is, the spiral tube 51 is located between the plurality of plate-like portions 86, extends along the length direction of the spiral tube 51, and is a cross-sectional deformation portion that is more easily deformed in the bending direction than the plate-like portion 86 85. With this configuration, the cross section perpendicular to the length direction of the helical tube 51 can be adjusted to a desired shape.

  The plate-like portion 86 and the cross-section deforming portion 85 extend spirally along the length direction of the helical tube 51. With this configuration, the cross section of the spiral tube 51 can be adjusted to a desired shape while suppressing torsion applied to the material tube 81 that provides the spiral tube 51. The spiral tube 51 is formed by a ribbed pipe 81 having a rib 83 extending along the circumferential direction. The cross-sectional deformed portion 85 is formed by notches 84 formed in the rib 83. With this configuration, the spiral tube 51 can be formed using the easily available ribbed pipe 81.

  FIG. 14 shows a material pipe 81 that has been deformed into the cross-sectional shape of the helical pipe 51. One cross-sectional deformation portion 85 is positioned on the curved surface of the spiral tube 51. The cross-sectional deformed portion 85 positioned on the curved surface allows the reinforcing rib 83 to be bent to a small radius. On the curved surface, the notch 84 that provides the cross-sectional deformation portion 85 is opened. One cross-section deforming portion 85 is positioned at a boundary portion between the curved surface and the flat surface of the spiral tube 51. At the boundary, the notch 84 is closed.

(Production method)
The method for manufacturing the turbine unit 5 of the hydroelectric generator 1 includes a first step and a second step. In the first step, a material pipe 81 made of a soft material is prepared. In the second step, the material pipe 81 is disposed along the core member 55 extending along the rotation axis AX. Thus, in the second step, the spiral tube 51 that spirally extends along the rotation axis AX around the rotation axis AX is formed. Further, in the second step, the material pipe 81 is fixed to the core member.

  The first step is also a step of preparing the material pipe 81. In the first step, the material pipe 81 having the cross-sectional deformation portion 85 is manufactured. The first step includes a step of forming a plurality of plate-like portions 86 and a plurality of cross-sectional deformation portions 85 in the material pipe 81. In the first step, the plate-like portion 86 and the cross-section deforming portion 85 are formed so as to extend spirally along the length direction of the material tube 81.

  In the illustrated example, the material pipe 81 is a ribbed pipe having a rib 83 extending along the circumferential direction. In the first step, the cross-section deformed portion 85 is formed by forming the notches 84 in the rib 83. By forming a plurality of incisions 84 arranged in a spiral, one cross-sectional deformation portion 85 is formed. A plurality of cuts 84 are formed along the plurality of spirals. As a result, a material pipe 81 having a plurality of cross-sectional deformation portions 85 is manufactured.

  In the second step, the plurality of material tubes 81 are arranged along the core member 55. The plurality of material tubes 81 are wound on the surface of the core member 55. The material pipe 81 is wound around and fixed to the outside of the core member 55 while the cross-section deforming portion 85 is positioned at a predetermined position. The material pipe 81 is fixed on the core member 55 by an adhesive and / or a fastening member. In the second step, the plurality of material tubes 81 are wound around the core member 55 and fixed. The helical cross-section deforming portion 85 and the plate-like portion 86 formed on the material tube 81 allow the material tube 81 to be wound spirally around the core member 55 while suppressing torsional deformation of the material tube 81. .

  The second step includes a step of deforming the material pipe 81 at the cross-section deforming portion 85. In the second step, a circular cross section orthogonal to the length direction of the material tube 81 is deformed into an oval shape having a long axis in the radial direction of the rotation axis AX. The material tube 81 is deformed so as to reduce the diameter of the material tube 81. The material pipe 81 is deformed so as to reduce the diameter of the orthogonal cross section along the axial direction of the rotation axis AX. In the second step, the shape of the orthogonal cross section of the material pipe 81 is deformed, and the spiral pipe 51 is provided. The width of the spiral tube 51 in the axial direction of the rotation axis AX is narrower than the diameter of the material tube 81.

  The manufacturing method includes a step of forming the inlet opening 51a. The forming step can include a step of cutting the plurality of material tubes 81 wound in a spiral shape in a cross section orthogonal to the rotation axis AX after the winding step. The forming step can include a step of cutting the end portion of each material pipe 81 to form the inlet opening 51a in the preparation step.

  After the winding step, the receiving bucket 52 is formed which forms the inlet opening 51a. Further, an adhesive or caulking agent is filled between the receiving bucket 52 and the spiral tube 51 and between the spiral tube 51 and the core member 55. Thereby, the turbine part 5 is provided.

  Thereafter, the turbine part 5 is mounted on the frame 3 and connected to the connecting part 7 and the generator 6. Further, in the installation work of the hydroelectric generator 1, the introduction unit 4 is installed in the water channel unit 2. Further, a turbine section 5 installed on the frame 3 is installed in the water channel section 2. Thereby, the hydroelectric generator 1 is completed.

  When replacing one or more spiral tubes 51, the existing spiral tube 51 is removed. Since the spiral tube 51 is soft, it can be easily removed. In the replacement work, the material pipe 81 prepared in the preparation process is used. Since the material pipe 81 is provided by a pipe available on the market, it is easy to procure the material pipe 81 for replacement. Furthermore, since the material pipe 81 is soft, a person can wind it around the core member 55. Such a feature enables repair at the installation site of the hydroelectric generator 1.

(Operation)
When water is supplied to the water channel unit 2, the introduction unit 4 flows the water into the inlet 53 of the receiving bucket 52. Water flows from the receiving bucket 52 into the plurality of spiral tubes 51. The water is supplied biased forward in the traveling direction of the rotation direction RD of the turbine unit 5. Therefore, a lot of water is supplied with a high flow rate to the spiral tube 51 in which the inlet opening 51a is located at a position where water can be easily received. The speed of flowing water is converted into a rotational force by the inclined wall surface in the spiral tube 51. As a result, the efficiency of the turbine unit 5 can be improved.

  The water that flows into the spiral tube 51 gives a rotational torque to the spiral tube 51 by gravity. In the illustrated example, the spiral tube 51 rotates counterclockwise. As the spiral tube 51 rotates, water flows down. Eventually, the water that has reached the outlet 54 is discharged from the spiral tube 51 to the water channel portion 2. Rotational torque is generated one after another in the plurality of spiral tubes 51. As a result, the turbine unit 5 rotates smoothly.

  The spiral tube 51 provides a closed turbine. The entire turbine unit 5 rotates. Therefore, water leakage and foreign object biting are suppressed. Further, since the spiral tube 51 is provided by the material tube 81, it is configured with a small number of parts. As a result, the turbine unit 5 and the hydroelectric generator 1 that are relatively inexpensive are provided.

  The rotation of the turbine unit 5 rotates the core member 55 and the shaft 71. The rotation of the turbine unit 5 is increased by the transmission 72 and transmitted to the generator 6. When the generator 6 rotates, the generator 6 generates power and outputs electric power. The generated electric power is supplied to a predetermined electric load or electric power system.

  According to this embodiment, since the spiral tube 51 for functioning as a spiral turbine is provided by the soft material, the spiral tube can be easily manufactured. Further, the spiral tube 51 can be easily replaced.

(Second Embodiment)
This embodiment is a modification based on the preceding embodiment. In the above embodiment, the spiral tube 51 is fixed to the core member 55 with an adhesive. A fastening member 288 shown in FIG. 15 may be employed instead of or in addition to the adhesive.

  The fastening member 288 is a metal or resin member. The fastening member 288 is a U-shaped member. The fastening member 288 is fixed to the core member 55 and has a pair of both end arms that extend in the radial direction from the core member 55. The fastening member 288 has an arch portion that is fixed to the arm portions at both ends and is positioned on the radially outer side of the spiral tube 51. The pair of both end arm portions are fixed with a space narrower than the diameter of the material tube 81.

  The pair of both end arms are fixed at an interval corresponding to the width of the spiral tube 51 obtained by deforming the material tube 81. A plurality of fastening members 288 are fixed to the core member 55. The plurality of fastening members 288 determine the positions of the spiral tube 51 in the axial direction and the radial direction on the core member 55. Therefore, the plurality of fastening members 288 provide a positioning portion for positioning the helical tube 51 on the core member 55. The fastening member 288, that is, the positioning portion is provided on the core member 55. Since the fastening member 288 clearly indicates the winding position of the material pipe 81 on the core member 55, the fastening member 288 supports the winding work.

  The fastening member 288 is fixed to the core member 55, thereby supporting the helical tube 51 fixedly to the core member 55. Further, as illustrated, the turbine unit 5 may employ a configuration including a single spiral tube 51.

(Third embodiment)
This embodiment is a modification based on the preceding embodiment. In the embodiment described above, the inlet opening 51a that opens in the orthogonal plane orthogonal to the rotation axis AX is formed. Instead of this, an inlet opening 351a shown in FIG. 16 may be adopted. The inlet opening 351a is opened at an end surface orthogonal to the length direction of the spiral tube 51. In other words, the inlet opening 351a opens toward only the front in the rotational direction RD of the turbine unit 5. Even in this shape, by providing the receiving bucket 52, a predetermined amount of water can be introduced into each spiral tube 51. However, the inlet opening 351a is opened in a cross section including the rotation axis AX, and is not opened in the circumferential direction around the rotation axis AX. For this reason, the inlet opening 351a introduces water only for a period of time located below the water surface in the receiving bucket 52. Further, the water supplied from the introduction part 4 to the receiving bucket 52 is unlikely to flow directly into the inlet opening 351a.

(Other embodiments)
The preferred embodiments of the invention have been described above, but the invention is not limited to the above-described embodiments, and various modifications can be made. The structure of the said embodiment is an illustration to the last, Comprising: The technical scope of invention is not limited to the range of these description. The invention is not limited to the combinations shown in the embodiments, and can be implemented independently. Some technical scope of the invention is indicated by the description of the scope of claims, and further includes all modifications within the meaning and scope equivalent to the description of the scope of claims.

  In the above embodiment, the turbine portion 5 is rotatably supported by the shaft 71. Instead, the turbine part 5 may be rotatably supported by providing an annular rail on the outer periphery of the turbine part 5 and providing a roller for supporting the annular rail on the frame 3.

  Moreover, in the said embodiment, the generator 6 was arrange | positioned on the rotating shaft AX. Alternatively, the generator 6 may be disposed on the turbine unit 5 in parallel with the rotation axis AX, and the generator 6 may be driven via a transmission mechanism such as a gear or a belt.

  In the above embodiment, a ribbed hose having the reinforcing rib 83 is used as the material pipe 81. Instead, a hose having a metal or fiber spiral reinforcing portion or a concentric annular reinforcing portion may be adopted as the material pipe 81. Also in these structures, the cross-sectional deformation part 85 can be formed by providing a notch in the spiral reinforcing part or the concentric annular reinforcing part. Furthermore, a material pipe may be provided by forming a spiral groove corresponding to the cross-section deforming portion 85 in a hose having a predetermined thickness. Even in such a configuration, the material pipe can be easily deformed in the cross-section deforming portion 85. For this reason, the work of winding the material pipe around the core member 55 can be facilitated. In addition, by providing the cross-sectional deformation portion 85, the spiral tube 51 having a predetermined cross-sectional shape can be easily formed from the material tube 81.

  Moreover, in the said embodiment, the some raw material pipe | tube 81 was wound in order and the some helical tube 51 was formed. Instead, the plurality of material tubes 81 may be arranged in parallel around the rotation axis AX, and the plurality of spiral tubes 51 may be formed by twisting them around the rotation axis AX.

  Moreover, in the said embodiment, the raw material pipe | tube 81 which has a circular cross section was employ | adopted. Instead, a material tube having a polygonal or polygonal cross section such as a quadrangle may be employed. Even when a material tube having such a non-circular cross section is employed, a plate-like portion and a cross-section deformed portion can be provided by forming a polygonal face and corners in a spiral shape.

  In the above embodiment, the spiral tube 51 is disposed outside the core member 55 as a winding core. Instead of this, the spiral tube 51 may be disposed along the inner surface of the cylindrical core member 55.

  In the above embodiment, the turbine unit 5 includes four spiral tubes 51. Instead, single, two, three, five, six, etc. spiral tubes 51 may be employed.

  Moreover, in the said embodiment, water was utilized. Instead of this, a fluid other than water, for example, a fluid such as warm water, chemicals, or oil may be supplied to the power generation apparatus 1.

1 Hydroelectric generator,
2 waterway, 3 frame, 4 introduction,
5 Turbine part, 6 Generator, 7 Connecting part,
21 Upper canal, 22 Lower canal,
41 filtration net, 42 dam plate,
51 spiral tube, 51a, 351a inlet opening, 52 receiving bucket,
53 inlet, 54 outlet, 55 core member,
71 shaft, 72 transmission, 73 joint,
81 material pipe, 82 wall surface part, 83 reinforcing rib, 84 notch,
85 cross-sectional deformation part, 86 plate-like part, 288 fastening member.

Claims (22)

A core member (55) extending along the rotation axis (AX);
Fixed to the core member (55), has an inlet opening (51a) for receiving fluid, and spirals from the inlet opening (51a) along the rotational axis (AX) around the rotational axis (AX). A spiral turbine for power generation, characterized in that the spiral turbine (51) extends.   The spiral turbine for power generation according to claim 1, wherein the spiral tube (51) is made of a soft material. The spiral tube (51)
A plurality of plate-like portions (86) having a predetermined strength with respect to the bending direction in a cross section perpendicular to the longitudinal direction of the helical tube (51);
It has a cross-sectional deformation part (85) which is located between a plurality of the plate-like parts, extends along the length direction of the spiral tube (51), and is more easily deformed in the bending direction than the plate-like part. The helical turbine for power generation according to claim 1 or 2, characterized by the above.   The helical plate for power generation according to claim 3, wherein the plate-like portion (86) and the cross-section deforming portion (85) extend spirally along the length direction of the helical tube (51). . The spiral tube (51) is formed by a ribbed pipe (81) having a rib (83) extending along the circumferential direction,
The spiral turbine for power generation according to claim 3 or 4, wherein the cross-sectional deformation portion (85) is formed by a notch (84) formed in the rib (83).   6. A plurality of helical tubes (51) comprising the helical tube (51) and another helical tube (51) of the same shape as the helical tube. Spiral turbine for power generation.   The spiral turbine for power generation according to claim 6, wherein a plurality of adjacent spiral tubes are closely arranged in contact with each other with respect to an axial direction and a circumferential direction of the rotation shaft (AX).   The power generation according to any one of claims 1 to 7, wherein a cross section perpendicular to the longitudinal direction of the spiral tube is an oval having a major axis in a radial direction of the rotation axis (AX). Spiral turbine.   The power generation spiral turbine according to any one of claims 1 to 8, further comprising an introduction mechanism (4, 52) for guiding a fluid to the inlet opening (51a).   10. The power generating spiral turbine according to claim 9, wherein the introduction mechanism includes a receiving bucket (52) disposed around the rotation axis (AX) so as to surround the inlet opening (51 a).   10. The power generation spiral turbine according to claim 9, wherein the introduction mechanism includes an introduction portion (4) that guides fluid toward the inlet opening (51 a). The introduction mechanism is
A receiving bucket (52) arranged to surround the inlet opening (51a) around the rotational axis (AX);
The power generating spiral turbine according to claim 9, further comprising an introduction portion (4) for guiding a fluid toward the receiving bucket.   The introduction part (4) is characterized in that water is biased and supplied so that a fluid is directly applied to the inlet opening (51a) in a region where the inlet opening (51a) moves from bottom to top. The power generating spiral turbine according to claim 11 or 12.   14. The power generation spiral turbine according to claim 1, wherein the inlet opening (51 a) is opened in a plane orthogonal to the rotation axis (AX). A helical turbine for power generation (5) according to any one of claims 1 to 14,
A power generator comprising: a generator (6) coupled to the power generating spiral turbine. A first step of preparing a material pipe (81) made of a soft material;
A spiral tube extending spirally along the rotation axis (AX) around the rotation axis (AX) by disposing the material tube along the core member (55) extending along the rotation axis (AX). And a second step of forming (51) and fixing the material pipe to the core member.   The first step is located between a plurality of plate-like portions (86) having a predetermined strength in the bending direction in a cross section orthogonal to the length direction of the material pipe (81), and the plurality of plate-like portions. The method further comprises a step of forming, in the material pipe, a cross-sectional deformation part (85) extending along the length direction of the material pipe (81) and being more easily deformed in the bending direction than the plate-like part. Item 17. A method for producing a helical turbine for power generation according to Item 16.   The said 1st process forms the said plate-shaped part (86) and the said cross-sectional deformation | transformation part (85) so that it may extend spirally along the length direction of the said raw material pipe | tube (81), A method for producing a helical turbine for power generation according to claim 17. The material pipe (81) is a ribbed pipe having a rib (83) extending along the circumferential direction,
19. The power generation spiral according to claim 17, wherein the first step forms the cross-sectional deformation portion (85) by forming a cut (84) in the rib (83). A method for manufacturing a turbine.   The method for manufacturing a power generating spiral turbine according to any one of claims 17 to 19, wherein the second step includes a step of deforming the material pipe at the cross-section deforming portion.   The said 2nd process deform | transforms the cross section orthogonal to the length direction of the said raw material pipe | tube (81) into the ellipse which has a long axis in the radial direction of the said rotating shaft (AX). The manufacturing method of the helical turbine for electric power generation of description.   The said 2nd process includes the process of arrange | positioning the said some raw material pipe | tube (81) along the said core member, The manufacture of the spiral turbine for electric power generation in any one of Claims 16-21 characterized by the above-mentioned. Method.

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