JP2014109235A - Water turbine device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict leakage of water out of buckets by preventing a frictional resistance as much as possible and improve a pressure transmission efficiency of water to the buckets.SOLUTION: This water turbine device comprises a water turbine 10 rotatably arranged around a rotating shaft 11 at a machine base 1 and having a plurality of water receiving buckets 15 with a diametral outward opening 16 along an outer periphery, a water supplying port 40 for supplying water toward the bucket 15 positioned at upper side to rotate the water turbine 10 in one direction and a first cover 50 for covering the plurality of buckets 15 from a water receiving space Wa to a water discharging space Wb extending along a rotational direction of the water turbine 10 so as to form the upper water receiving space Wa enabling the bucket 15 to receive water and a lower water discharging space Wb enabling water to be discharged, and there is provided a seal member 80 for sealing among axial both outer peripheral edges 17 of the water turbine 10 and opposing plates 52 at axial both side edges of the first cover 50.

Description

  The present invention relates to a water turbine apparatus including a so-called bucket type water turbine, and more particularly, to a water turbine apparatus including a cover that covers a water turbine until the water turbine receives and drains water.

  Conventionally, for example, a technique described in Japanese Utility Model Publication No. 56-88964 (Patent Document 1) is known as this type of water turbine apparatus. As shown in FIG. 14, this water turbine apparatus Sa is arranged in a row with a plurality of buckets 102 that are provided on a machine base so as to be rotatable about a rotation shaft 101 and receive water having openings 102 a radially outward along the outer periphery. A water turbine 100 is provided. The water wheel 100 includes a pair of side plates 103 facing each other at a predetermined interval along the axial direction of the rotating shaft 101, and a bottom plate 104 provided between the side plates 103 along the circumferential direction around the rotating shaft 101. And a plurality of water receiving plates 105 provided between the side plates 103 and on the outer periphery of the bottom plate 104 at equal angles and at equal intervals, and a plurality of buckets 102 are formed by the side plates 103, the bottom plate 104 and the water receiving plate 105. Yes.

  In addition, the water turbine device Sa supplies water toward the bucket 102 located on the upper side and rotates the water turbine 100 in one direction, and the bucket 102 of the water turbine 100 receives water from the water supply port 106. Drainage space along the rotation direction of the water turbine 100 from the water receiving space Wa so as to form an upper water receiving space Wa that enables water and a lower water draining space Wb that allows water received in the water receiving space Wa to be discharged. A cover 107 that covers the openings 102a of the plurality of buckets 102 is provided over the distance up to Wb. The cover 107 has an arcuate curved plate 108 having an inner peripheral surface along the outer peripheral surface 100a of the water turbine 100 with a required clearance Ca therebetween, and substantially half of both sides of the water turbine 100 connected to both sides of the curved plate 108. A semi-disc-shaped side plate 109 is provided.

  As a result, when water is supplied into the bucket 102 from the water supply port 106, dynamic pressure acts on the water receiving plate 105, and the water turbine is rotated. In this case, since the openings 102a of the plurality of buckets 102 are covered by the cover 107 from the water receiving space Wa to the drainage space Wb along the rotation direction of the water turbine 100, until the drainage space Wa is reached, Since the water is prevented from jumping out from the bucket 102 and is kept almost full in the bucket 102, the pressure transmission to the water turbine 100 is improved, and the rotation efficiency is improved.

Japanese Utility Model Publication No. 56-88964

By the way, in the conventional water turbine device Sa, there is a clearance Ca between the curved plate 108 of the cover 107 and the outer peripheral surface 100a of the water turbine 100, and the clearance Ca communicates with the side plate 109 of the cover 107. Since there is a gap Cb also between the side plate 103 of the water wheel 100, there is a problem that water leaks through the gap Cb, resulting in a loss of energy transfer. In order to prevent this, the clearance between the curved plate 108 of the cover 100 and the tip of the water receiving plate 105 may be zero. However, since frictional resistance is generated, the efficiency is rather deteriorated.
The present invention has been made in view of the above-described problems, and is a water turbine that suppresses leakage of water from a bucket and suppresses the leakage of water as much as possible to improve pressure transmission efficiency with respect to the water turbine. An object is to provide an apparatus. Moreover, since the pressure which acts on a water receiving plate also rises by the part which suppresses the leakage of water, it also made it the subject to improve intensity | strength as needed.

In order to achieve such an object, a watermill device of the present invention receives a machine base and water that is provided on the machine base so as to be rotatable about a rotation shaft and has an opening radially outward along the outer periphery. A water turbine configured by arranging a plurality of buckets, a water supply port for supplying water toward the bucket located on the upper side and rotating the water turbine in one direction, and a bucket of the water turbine from the water supply port The drainage along the rotation direction of the water turbine from the water receiving space so as to form an upper water receiving space that allows the water to be received and a lower drainage space that allows the water received in the water receiving space to be discharged In the watermill device provided with a cover that covers the openings of the plurality of buckets over the space,
A seal member is provided to seal between the outer peripheral edge portions on both sides in the axial direction of the water wheel and the both side edges in the axial direction of the cover.

  As a result, when water is supplied into the bucket from the water supply port, dynamic pressure acts on the water receiving plate, and the water turbine is rotated. In this case, since the cover covers the openings of the plurality of buckets from the receiving space to the drainage space along the direction of rotation of the water turbine, the water is discharged outward from the bucket until the drainage space is reached. Since it is prevented from popping out and kept in a substantially full state in the bucket, the pressure transmission to the water turbine is reliably performed. At this time, if there is a clearance between the cover and the opening of the bucket, water leaks through this clearance, but the seal member is located on both sides in the axial direction of the water turbine and between the outer peripheral edge portion and both side edge portions of the cover. Since it is sealed by this, water is prevented from leaking out during this period. Therefore, energy transmission loss is prevented as much as leakage of water is prevented, so that rotational energy can be increased and rotational efficiency can be improved. Further, since the seal is made by the seal member, it is possible to keep the frictional resistance extremely low as compared with the case where the outer periphery of the water turbine is directly brought into contact with the cover.

Then, if necessary, the water turbine is centered on the rotation shaft between a pair of side plates supported by the rotation shaft and opposed to each other at a predetermined interval along the axial direction of the rotation shaft. A bottom plate provided along a circumferential direction, and a plurality of water receiving plates provided at equal angles and at equal intervals between the side plates and on the outer periphery of the bottom plate, the side plate, the bottom plate, and the water receiving plate. A plurality of buckets are formed, and the seal member is provided so that either one of the outer peripheral edge of the side plate and the side edge of the cover is in sliding contact with the other.
Accordingly, the seal member is interposed between the outer peripheral edge portion of the side plate and the side edge portion of the cover, and is provided in a direction along the rotation direction of the water turbine, so that the sliding contact with the seal member is smoothly performed. Therefore, the frictional resistance can be surely reduced.

  In this case, a curved plate along the outer peripheral surface of the water wheel, and a pair of belt-shaped facings that constitute both side edges of the cover and project from the curved plate in the direction of the rotation axis and face the outer peripheral edge of the side plate. It is effective to include a plate and attach the seal member to the counter plate so that the outer peripheral edge of the side plate is in sliding contact with the seal member. Thus, since the seal member is attached to the belt-like counter plate, the attachment can be easily performed, and the side plate for covering the side surface of the water turbine is not required as in the prior art, and the structure can be simplified accordingly.

  Further, if necessary, a support frame for supporting each of the side plates is provided, and the support frame is formed by bending a pipe corresponding to the disk-shaped base material fixed to the rotating shaft and the outer peripheral edge of the side plate. And a plurality of spokes extending between the base material and the ring and extending in the radial direction and formed of pipes. Since each side plate is supported by the spoke-like support frame, the strength of the water turbine can be increased. In particular, the response when the water pressure is high is ensured. Moreover, since it is a spoke, it is lightweight, and rotation efficiency is very good.

  In this case, if necessary, the side plate is fixed to the inside of the support frame, and the water receiving plate is provided so that its base end is joined to the bottom plate and the tip is positioned on the rotating shaft side from the outer peripheral edge of the side plate. The cover includes a curved plate along the outer peripheral surface of the water wheel, and a pair of belt-shaped pairs that constitute both side edges of the cover and project from the curved plate in the direction of the rotation axis and face the outer peripheral edge of the side plate. And the seal member is attached to the counter plate so that the inner surface of the outer peripheral edge of the side plate is in sliding contact with the seal member. Since the support frame presses the side plate from the outside, the support frame can reliably cope with water pressure, and the sealing is improved by sealing with the seal member on the inner surface of the outer peripheral edge of the side plate.

Moreover, it is set as the structure which provided the clearance adjustment mechanism which adjusts the clearance gap between the front-end | tip of the water receiving plate of the said water turbine, and the said cover as needed.
Since the clearance adjustment mechanism can adjust the clearance between the tip of the water receiving plate of the water wheel and the cover, the amount of water leaking from this clearance can be adjusted to adjust the load applied to the seal member. While avoiding the contact between the receiving plate and the cover, the seal by the seal member can be more reliably ensured.

  In this case, if necessary, the clearance adjusting mechanism is provided corresponding to each of the plurality of support bars that extend outside the cover and extend along the direction of the rotation axis, and to which the cover is attached. A plurality of sets of a pair of fixing members capable of fixing both ends of the support bar to the machine base, a support bolt provided on the fixing member, and an insertion hole formed in the support bar and inserted into the support bolt A support nut that is on the fixing member side from the support bar and is screwed to the support bolt; and a fixing nut that is outside the support bar and is screwed to the support bolt, the support nut and the fixing nut The position of the cover is adjusted by adjusting the screw position. The position of the cover is adjusted by adjusting the screwing position of the support nut and the fixing nut, so that the structure is simple and the position can be adjusted easily, and the cover is supported from the outside by a plurality of support bars. Can be reliably supported.

  Further, if necessary, the fixing member is constituted by a rod-shaped member having one end fixed to the machine base and the other end fixed to the support bar, and a plurality of the rod-shaped members corresponding to the support bar are provided. Each rod-like member is configured to be arranged radially on the machine base. Since the plurality of rod-shaped members are provided radially, the support bar can be reliably supported.

  Further, if necessary, the water receiving plate is configured to be curved so that the upstream side in the rotational direction is concave. The area of the water receiving plate can be increased to reliably receive water.

  Moreover, it is set as the structure which constructed the arm between the said adjacent water receiving plates as needed. Since the water leakage is suppressed by the sealing member, the force acting on the water receiving plate increases accordingly. However, an arm is installed between the water receiving plates, and the arm also receives a load acting on the water receiving plate. Therefore, the strength is increased, and the water turbine can be reliably rotated while suppressing water leakage. Further, the water from the water supply port part also comes into contact with the arm, but the arm itself receives water, so that the burden on the water receiving plate can be reduced accordingly.

  Furthermore, it is set as the structure which provided the said arm in multiple rows along the axial direction of the said rotating shaft as needed. The strength is further increased, and the water turbine can be reliably rotated while suppressing water leakage. Moreover, it becomes easy to receive water also by an arm, The burden to a water receiving plate can be reduced only that much.

  Furthermore, if necessary, the arm is configured to be curved so that the upstream side in the rotational direction is concave. Since the arm is curved, it becomes easier to receive water when water from the water supply port abuts on the arm, and the burden on the water receiving plate can be reduced accordingly.

  Further, if necessary, another cover is provided to cover the openings of the plurality of buckets from the drainage space to the water receiving space along the rotation direction. Thereby, compared with the case where there is no other cover (conventional), the drainage space can be narrowed, and the situation where the drainage is scattered to the rear side can be prevented.

  In this case, it is effective to project a stop plate for stopping water drained into the drain space at the end of the other cover on the drain space side. Since the drainage stops against the stop plate, it is possible to reliably prevent the wastewater from scattering to the rear side.

  According to the present invention, since the openings of the plurality of buckets are covered by the cover from the water receiving space to the drainage space along the rotation direction of the water turbine, the water is discharged from the bucket until the drainage space is reached. Since it is prevented from jumping outward and the bucket is kept full of water, pressure transmission to the water turbine is reliably performed. At this time, if there is a clearance between the cover and the opening of the bucket, water leaks through this clearance, but the seal member is located on both sides in the axial direction of the water turbine and between the outer peripheral edge portion and both side edge portions of the cover. Because of this, water is prevented from leaking out during this period. Therefore, energy transmission loss is prevented as much as leakage of water is prevented, so that rotational energy can be increased and rotational efficiency can be improved. Further, since the seal is made by the seal member, it is possible to keep the frictional resistance extremely low as compared with the case where the outer periphery of the water turbine is directly brought into contact with the cover.

It is a perspective view which shows the water turbine apparatus which concerns on embodiment of this invention. It is a front view which shows the watermill apparatus which concerns on embodiment of this invention. It is a side view which shows the water turbine apparatus which concerns on embodiment of this invention. It is a top view which shows the watermill apparatus which concerns on embodiment of this invention. It is front sectional drawing which shows the water turbine apparatus which concerns on embodiment of this invention. It is side surface sectional drawing which shows the water turbine apparatus which concerns on embodiment of this invention. It is a perspective view which shows the watermill apparatus which concerns on embodiment of this invention by removing a side plate and seeing through. It is a disassembled perspective view which shows the structure of a water turbine in the water turbine apparatus which concerns on embodiment of this invention. In the watermill device concerning an embodiment of the invention, the structure of an arm is shown, (a) is a perspective view and (b) is an AA line sectional view in (a). It is a disassembled perspective view which shows the relationship between the 1st cover with respect to a machine base, a 2nd cover, and a clearance adjustment mechanism in the water turbine apparatus which concerns on embodiment of this invention. It is sectional drawing which shows a clearance adjustment mechanism in the water turbine apparatus which concerns on embodiment of this invention. FIG. 7 is an enlarged cross-sectional view of a portion B in FIG. 6 showing a seal structure between the water wheel and the first cover (second cover) in the water wheel device according to the embodiment of the present invention. It is a perspective view which shows the example of the weir in which the water turbine apparatus which concerns on embodiment of this invention is used. An example of the conventional watermill apparatus is shown, (a) is front sectional drawing, (b) is side sectional drawing.

Hereinafter, based on an accompanying drawing, a watermill device concerning an embodiment of the invention is explained in detail.
1 to 12 show a water turbine apparatus S according to an embodiment of the present invention. The basic configuration of the water turbine apparatus S includes a machine base 1 and a plurality of buckets that are provided on the machine base 1 so as to be rotatable about a rotating shaft 11 and receive water having an opening 16 radially outward along the outer periphery. 15, a water supply port 40 configured to supply water toward the bucket 15 located on the upper side and rotate the water wheel 10 in one direction, and a bucket 15 of the water turbine 10 is connected to the water supply port 40. Rotation of the water turbine 10 from the water receiving space Wa so as to form an upper water receiving space Wa that allows water to be received from the water and a lower drainage space Wb that allows the water received in the water receiving space Wa to be discharged. The first cover 50 covering the openings 16 of the plurality of buckets 15 over the drainage space Wb along the direction, and the buckets 15 between the drainage space Wb and the water receiving space Wa along the rotation direction. A first cover 50 covering the opening 16; Another second cover 60 is configured by a rotary mechanism 90 for taking out a rotation of the rotary shaft 11.

  As shown in FIGS. 1 to 7 and 10, the machine base 1 is constructed by welding a hollow metal rod member made of metal such as iron, and is separated from the base 2 and the intermediate portion of the base 2 by a predetermined interval. A pair of first supports 3 that support the water wheel 10 and a second support 4 that supports the water supply port 40 and is provided at one end of the base 2. As shown in FIG. 10, the first support body 3 includes two support columns 3a and 3a that converge at the upper end side, a support rod 3b that is installed between the support columns 3a and 3a, and a support that supports the support rod 3b. And 3c. A construction plate 5 is constructed between the upper ends of the pair of first supports 3. The second support body 4 is constructed between two support pillars 4a and 4a standing on the base at predetermined intervals corresponding to the support pillars 3a and 3a of the first support body 3, and between the upper ends of the support pillars 4a and 4a. The upper end rod 4b is provided, and the upper end rod 4b and the reinforcing rod 4c installed between the support columns 3a and 3a of the first support 3 are provided.

  As shown in FIGS. 1 to 8, the water turbine 10 includes a pair of annular (ring-shaped) side plates 12 that are supported by the rotary shaft 11 and opposed to each other at a predetermined interval along the axial direction of the rotary shaft 11. A bottom plate 13 provided between the side plates 12 along the circumferential direction centering on the rotation axis 11, and a plurality of water receiving plates 14 provided between the side plates 12 and at the outer periphery of the bottom plate 13 at equal angles and at equal intervals. The side plate 12, the bottom plate 13, and the water receiving plate 14 form a plurality (12 in the embodiment) of buckets 15. The bottom plate 13 and the water receiving plate 14 are fixed to the side plate 12 with screws or the like. As shown in FIGS. 5 and 8, the water receiving plate 14 is curved so that the upstream side in the rotational direction is concave, the base end is joined to the bottom plate 13, and the tip 14 a is the outer peripheral edge portion 17 of the side plate 12. It is provided so as to be positioned closer to the rotating shaft 11 side.

  Further, each side plate 12 is supported by being fixed to the support frame 20 from the outside by screws or the like. That is, the side plate 12 is fixed inside the support frame 20. The support frame 20 includes a disk-shaped base material 21 fixed to the rotary shaft 11, an annular ring 22 formed by bending a pipe corresponding to the outer peripheral edge of the side plate 12, and the base material 21 and the annular ring 22. A plurality of spokes 23 that are installed and extend in the radial direction and are formed of pipes. Since each side plate 12 is supported by the spoke-like support frame 20, the strength of the water turbine 10 can be increased. In particular, the response when the water pressure is high is ensured. Moreover, since it is the spoke 23, it is lightweight and rotation efficiency is very good.

  As shown in FIG. 6, between the left and right base materials 21, a fixed tube 24 is installed to which the rotary shaft 11 is passed and fixed. Both ends of the rotating shaft 11 are formed to project from the support frame 20, and the projecting portions of the rotating shaft 11 can be freely rotated via a bearing portion 25 on a construction rod 3 b constructed between two support columns in the first support 3 of the machine base 1. It is supported by. The size of the water turbine 10 is set to, for example, a diameter of 2000 mm and an axial width of 600 mm. The size is not limited to this.

  In addition, as shown in FIGS. 5, 6, 7, and 9, an arm 30 is installed between adjacent water receiving plates 14. The arm 30 is curved and formed in a bowl shape so that the upstream side in the rotation direction is concave. The arms 30 are arranged in a plurality of rows along the axial direction of the rotary shaft 11. Specifically, an arm assembly 31 in which a pair of arms 30 are arranged side by side is used. The arm assembly 31 is configured by fixing both ends of a pair of arms 30 to mounting plates 32 and 32, respectively, and by fixing the mounting plates 32 and 32 to the adjacent water receiving plate 14 with screws or the like, It is attached. In the embodiment, as shown in FIG. 7, three arm assemblies 31 are arranged in a row along the axial direction of the rotating shaft 11 with an interval therebetween.

  As shown in FIG. 5, the water supply port portion 40 is a tube body 41, and is fixed to the upper end flange 4 b via a bracket 42 with the axis line being substantially horizontal in the second support body 4 of the machine base 1. Yes. The tip 43 of the water supply port 40 is cut and formed obliquely in correspondence with the width between the tips of the adjacent water receiving plates 14, and supplies water toward the bucket 15 located on the upper side so that the water wheel 10 is unidirectional. Rotate to.

  As shown in FIGS. 1 to 5, 7, and 10 to 12, the first cover 50 is provided in the machine base 1, and as described above, the bucket 15 of the water turbine 10 is connected to the water inlet 40. Rotation of the water turbine 10 from the water receiving space Wa so as to form an upper water receiving space Wa that allows water to be received from the water and a lower drainage space Wb that allows the water received in the water receiving space Wa to be discharged. The openings 16 of the plurality of buckets 15 are covered between the drainage space Wb along the direction. And the 1st cover 50 comprises the curved board 51 in alignment with the outer peripheral surface of the water wheel 10, and the both-sides edge part of the 1st cover 50, and is protrudingly provided in the rotating shaft 11 direction from the curved board 51, and the outer-periphery edge part of the side plate 12 17 is provided with a pair of strip-shaped opposing plates 52 facing the inner surface of 17. As shown in FIGS. 5 and 12, the leading edge 53 of the counter plate 52 is formed along the outer peripheral surface 54 formed by connecting the leading ends 14 a of the water receiving plates 14.

  The second cover 60 is provided on the machine base 1 and covers the openings 16 of the plurality of buckets 15 from the drainage space Wb to the water receiving space Wa along the rotation direction as described above. is there. And the 2nd cover 60 comprises the curved plate 61 along the outer peripheral surface of the water turbine 10, and the both-sides edge part of the 2nd cover 60 similarly to the 1st cover 50, and protrudes from the curved plate 61 to the rotating shaft 11 direction. And a pair of strip-shaped opposing plates 62 facing the inner surface of the outer peripheral edge portion 17 of the side plate 12. The leading edge 63 of the counter plate 62 is formed along the outer peripheral surface 54 formed by connecting the leading ends 14 a of the water receiving plates 14.

  In the embodiment, a water receiving space Wa where the tip of the water supply port 40 faces is formed between the upper end of the first cover 50 and the upper end of the second cover 60, and the lower end of the first cover 50 and the second cover 60 are formed. A drainage space Wb is formed between the lower ends of the two. The positions of the water receiving space Wa and the drainage space Wb are appropriately determined. However, in the embodiment, as shown in FIG. 5, the water receiving space Wa is on the vertical axis passing through the center of the rotating shaft 11. The drainage space Wb is formed such that the start end passes through the center of the rotary shaft 11 and the opposite direction of rotation of the angle θ1 (45 °) from the vertical axis is located on the axis of the drain. , And the terminal end passes through the center of the rotary shaft 11 and is formed so that the rotational direction of the angle θ2 (45 °) from the vertical axis is on the axis of the hook. A stop plate 65 is provided at the end of the second cover 60 on the drain space Wb side so as to stop water drained into the drain space Wb.

  In the embodiment, as shown in FIGS. 1 to 5, 7, 10, and 11, a clearance adjustment mechanism that adjusts the clearance between the tip 14 a of the water receiving plate 14 of the water turbine 10 and the first cover 50. 70 is provided. Further, a similar clearance adjustment mechanism 70 that adjusts the clearance between the tip 14 a of the water receiving plate 14 of the water turbine 10 and the second cover 60 is provided. Since the clearance adjustment mechanism 70 of the first cover 50 and the second cover 60 has the same configuration, the configuration of the first cover 50 will be described.

  The clearance adjustment mechanism 70 corresponds to each of the support bars 72 and a plurality of support bars 72 that are outside the first cover 50 and extend along the direction of the rotation axis 11 and to which the first cover 50 is attached via attachment protrusions 71. And a plurality of sets of a pair of fixing members 73 that are provided respectively and can fix both ends of the support bar 72 to the machine base 1. An annular body 74 that is partially cut away around the rotation shaft 11 and is formed by bending a pipe is fixed to the column 3 a of the first support 3 of the machine base 1. The rod-shaped member 74 is fixed to the torus 74 or the column 3a and the other end is formed of a pipe-shaped member to which the support bar 72 is fixed. A plurality of the rod-shaped members are provided corresponding to the support bar 72. They are arranged radially with respect to the torus 74 of the table 1.

  Further, as shown in FIG. 11, the clearance adjustment mechanism 70 includes a support bolt 76 screwed into a cap 73 a provided at the tip of the fixing member 73 and locked by a nut 75, and a support bolt 72 formed on the support bar 72. An insertion hole 77 to be inserted, a support nut 78 on the fixing member 73 side of the support bar 72 and screwed to the support bolt 76, and a fixing nut 79 on the outside of the support bar 72 and screwed to the support bolt 76 The position of the first cover 50 is adjusted by adjusting the screwing position of the support nut 78 and the fixing nut 79. Since the first cover 50 is supported from the outside by the plurality of support bars 72, it can be reliably supported on the machine base 1. Moreover, since the rod-shaped members as the plurality of fixing members 73 are provided radially, the support bar 72 can be reliably supported. The adjustment by the clearance adjustment mechanism 70 is, for example, about 1 mm to 10 mm between the tip 14 a of the water receiving plate 14 and the tip edge 53 of the counter plate 52 of the first cover 50.

  And in the water turbine apparatus S which concerns on embodiment, as shown in FIG.6 and FIG.12, it seals between the outer-periphery edge part 17 of the axial direction both sides of the water turbine 10, and the axial direction both sides edge part of the 1st cover 50. A sealing member 80 is provided. Further, a similar seal member 80 is provided for sealing between the outer peripheral edge portion 17 on both sides in the axial direction of the water turbine 10 and both side edges in the axial direction of the second cover 60. Since the seal member 80 in the first cover 50 and the second cover 60 has the same configuration, the seal member 80 in the first cover 50 will be described.

As shown in FIG. 12, the seal member 80 is provided on one of the outer peripheral edge 17 of the side plate 12 of the water turbine 10 and the side edge of the first cover 50 (in the embodiment, the side edge of the first cover 50). , Either one (in the embodiment, the side edge portion of the side plate 12) is provided so as to be in sliding contact.
Specifically, the seal member 80 is formed of a flexible rubber, resin, or the like, and includes a strip-shaped base portion 81 and a strip-shaped lip 82 protruding from one side edge of the base portion 81. The seal member 80 has a base portion 81 attached to the counter plate 52 with an adhesive or the like so that the inner surface of the outer peripheral edge portion 17 of the side plate 12 is in sliding contact with the lip 82.
Since the seal member 80 is attached to the strip-shaped counter plate 52, the attachment is easily performed, and a side plate covering the side surface of the water turbine 10 is not required as in the prior art, and the structure can be simplified accordingly. .

  As shown in FIG. 1 to FIG. 4 and FIG. 6, the rotation mechanism unit 90 is linked to one end side of the rotation shaft 11, and supports the rotation shaft 11 on the pedestal 91 with a bearing. The rotation is transmitted to the power pulley 93 through 92. For example, a generator (not shown) is linked to the power pulley 93.

For example, as shown in FIG. 13, the water turbine apparatus S configured as described above is attached to a weir K such as a lake.
Therefore, according to the watermill device S according to this embodiment, the clearance between the tip of the water receiving plate 14 of the watermill 10 and the first cover 50 and the second cover 60 is adjusted in advance in the clearance adjustment mechanism 70. . In this case, as shown in FIG. 11, the positions of the covers 50 and 60 are adjusted by adjusting the screwing position of the support nut 78 and the fixing nut 79. The structure is simple and the position can be adjusted easily.

  In this state, for example, water is taken from the weir K and supplied to the water turbine device S. When water is supplied from the water supply port 40 into the bucket 15, dynamic pressure acts on the water receiving plate 14, and the water turbine 10 is rotated. In this case, as shown in FIG. 8, since the water receiving plate 14 is curved so that the upstream side in the rotation direction is concave, the area of the water receiving plate 14 is large and water can be received reliably. it can.

  In this case, since the first cover 50 covers the openings 16 of the plurality of buckets 15 from the water receiving space Wa to the drainage space Wb along the rotation direction of the water turbine 10, the drainage space Wb Until then, the water is prevented from jumping out of the bucket 15 and is kept almost full in the bucket 15, so that the pressure is reliably transmitted to the water turbine 10. At this time, if there is a clearance between the first cover 50 and the opening 16 of the bucket 15, water leaks through this clearance. However, as shown in FIG. Since the gap between the portion 17 and the facing plate 52 which is both side edge portions of the first cover 50 is sealed by the sealing member 80, water is prevented from leaking from this space. Therefore, energy transmission loss is prevented as much as leakage of water is prevented, so that rotational energy can be increased and rotational efficiency can be improved. Further, since the seal is made by the seal member 80, the frictional resistance can be suppressed to be extremely low as compared with the case where the outer periphery of the water turbine 10 is directly brought into contact with the cover.

  In particular, the seal member 80 is interposed between the outer peripheral edge portion 17 of the side plate 12 and the facing plate 52 that is both side edge portions of the first cover 50, and is provided in a direction along the rotation direction of the water turbine 10. Therefore, the sliding contact by the seal member 80 is performed smoothly, and the frictional resistance can be reliably reduced. In this case, since the support frame 20 presses the side plate 12 from the outside, the support frame 20 can reliably cope with the water pressure and is sealed by the sealing member 80 on the inner surface of the outer peripheral edge portion 17 of the side plate 12, so that the sealing performance is improved. Be made. Further, in this case, since the clearance between the tip 14a of the water receiving plate 14 of the water turbine 10 and the first cover 50 is adjusted by the clearance adjusting mechanism 70, the amount of water leaking from this clearance is adjusted to The load applied to the member 80 can be adjusted, so that the seal by the seal member 80 can be more reliably ensured while avoiding contact between the water receiving plate 14 and the first cover 50.

  Further, since the water leakage is suppressed by the seal member 80, the force acting on the water receiving plate 14 is increased accordingly. However, as shown in FIGS. Since it is constructed and can receive the load acting on the water receiving plate 14 by the arm 30 as well, the strength is increased, and the water turbine 10 can be reliably rotated while suppressing water leakage. Moreover, although the water from the water supply port part 40 also contacts the arm 30, the arm 30 itself receives water, so that the burden on the water receiving plate 14 can be reduced accordingly.

  In this case, since the arms 30 are arranged in a plurality of rows along the axial direction of the rotary shaft 11, the strength is further increased, and the water turbine 10 can be reliably rotated while suppressing water leakage. Moreover, it becomes easy to receive water also by the arm 30, and the burden to the water receiving plate 14 can be reduced by that much. Furthermore, since the arm 30 is formed in a curved shape, when water from the water supply port 40 comes into contact with the arm 30, it becomes easy to receive water, and the load on the water receiving plate 14 can be reduced accordingly. .

  The water put into the bucket 15 from the water receiving space Wa is drained from the drainage space Wb. In this case, since the second cover 60 covering the openings 16 of the plurality of buckets 15 is provided from the drainage space Wb to the water receiving space Wa along the rotation direction, there is no conventional second cover 60. In comparison, the drainage space Wb can be narrowed, and the situation where the drainage is scattered to the rear side can be prevented. Further, since the drainage stops at the stop plate 65 provided on the second cover 60, it is possible to reliably prevent the situation where the drainage is scattered to the rear side.

  In the above embodiment, in the first cover 50, the facing plate 52 is opposed to the inner surface of the outer peripheral edge portion 17 of the side plate 12, and the seal member 80 is attached to the facing plate 52. However, the present invention is not limited to this. The sealing member 80 may be attached to the facing plate 52 with the facing plate 52 facing the outer surface of the outer peripheral edge portion 17 of the side plate 12, and may be changed as appropriate. Further, the shape and material of the seal member 80 are not limited to those described above, and may be appropriately changed, for example, constituted by an O-ring or cushion rubber.

S water turbine device 1 machine base 2 base 3 first support 4 second support 10 water wheel 11 rotating shaft 12 side plate 13 bottom plate 14 water receiving plate 14a tip 15 bucket 16 opening 17 outer peripheral edge 20 support frame 21 base material 22 ring 23 Spoke 24 Fixed pipe 25 Bearing portion 30 Arm 31 Arm assembly 32 Mounting plate 40 Water supply port portion 50 First cover 51 Curved plate 52 Opposite plate 53 Tip edge 54 Outer peripheral surface 60 Second cover 61 Curved plate 62 Opposite plate 63 Tip edge 65 Stop plate Wa Receiving space Wb Drainage space 70 Clearance adjusting mechanism 71 Protrusion 72 Support bar 73 Fixing member 74 Toroidal body 75 Nut 76 Support bolt 77 Insertion hole 78 Support nut 79 Fixing nut 80 Seal member 81 Base 82 Lip 90 Rotation Mechanism 91 Pedestal 92 Belt transmission mechanism 93 Power pulley

Claims (14)

A water turbine comprising a machine base and a plurality of buckets arranged in the machine base so as to be rotatable about a rotation axis and receiving water having an opening radially outward along the outer periphery; A water supply port for supplying water toward the bucket located and rotating the water wheel in one direction; an upper water receiving space for allowing the bucket of the water wheel to receive water from the water supply port; A cover that covers the openings of the plurality of buckets from the water receiving space to the water discharging space along the rotation direction of the water turbine so as to form a lower water discharging space that allows the water received in the space to be discharged. In a watermill device comprising:
A water turbine apparatus comprising a seal member that seals between outer peripheral edge portions on both sides in the axial direction of the water wheel and both side edges in the axial direction of the cover.   A pair of side plates that are supported by the rotary shaft at a predetermined interval along the axial direction of the rotary shaft and that face each other, and a circumferential direction around the rotary shaft between the side plates. And a plurality of water receiving plates provided at equal angles and at equal intervals between the side plates and on the outer periphery of the bottom plate, and forming a plurality of buckets by the side plates, the bottom plate, and the water receiving plate. The water turbine apparatus according to claim 1, wherein the seal member is provided so that either one of the outer peripheral edge portion of the side plate and the side edge portion of the cover is in sliding contact with the other.   The cover includes a curved plate along the outer peripheral surface of the water wheel, and a pair of belt-shaped pairs that form both side edges of the cover and project from the curved plate in the direction of the rotation axis and face the outer peripheral edge of the side plate. 3. The watermill device according to claim 2, further comprising a counter plate, wherein the seal member is attached to the counter plate so that an outer peripheral edge of the side plate is in sliding contact with the seal member.   A support frame that supports each of the side plates is provided, the support frame is a disk-shaped base that is fixed to the rotating shaft, a ring that is formed by bending a pipe corresponding to the outer periphery of the side plate, and 4. The watermill device according to claim 2, further comprising a plurality of spokes that are provided between the base material and the ring and extend in the radial direction and formed by pipes.   The side plate is fixed to the inside of the support frame, the water receiving plate is provided such that its base end is joined to the bottom plate and the tip is positioned on the rotating shaft side from the outer peripheral edge of the side plate, and the cover is provided with the water wheel. And a pair of strip-shaped counter plates that form both side edges of the cover and project from the curved plate in the direction of the rotation axis and face the inner surface of the outer peripheral edge of the side plate. 5. The watermill device according to claim 4, wherein the water turbine device is configured to be provided, and the inner surface of the outer peripheral edge of the side plate is in sliding contact with the sealing member by attaching the sealing member to the facing plate.   The watermill device according to any one of claims 2 to 5, further comprising a clearance adjusting mechanism that adjusts a clearance between a tip of a water receiving plate of the waterwheel and the cover.   The clearance adjustment mechanism includes a plurality of support bars that extend outside the cover and extend along the direction of the rotation axis, and are attached to the respective support bars. A plurality of sets of a pair of fixing members that can be fixed to the machine base, a support bolt provided on the fixing member, an insertion hole formed in the support bar and inserted through the support bolt, and fixed from the support bar A support nut which is on the member side and is screwed to the support bolt; and a fixing nut which is outside the support bar and is screwed to the support bolt, and is covered by adjusting a screwing position of the support nut and the fixing nut. The watermill device according to claim 6, wherein the position adjustment is performed.   The fixing member is composed of a rod-shaped member having one end fixed to the machine base and the other end fixed to the support bar. A plurality of the rod-shaped members are provided corresponding to the support bar, and each rod-shaped member is attached to the machine. The watermill device according to claim 7, wherein the waterwheel device is arranged radially on the table.   The water turbine device according to any one of claims 2 to 8, wherein the water receiving plate is curved so that the upstream side in the rotation direction is concave.   The watermill device according to any one of claims 2 to 9, wherein an arm is installed between the adjacent water receiving plates.   The water turbine device according to claim 10, wherein the arm is provided in a plurality of rows along the axial direction of the rotating shaft.   The watermill device according to claim 10 or 11, wherein the arm is curved so that the upstream side in the rotation direction is concave.   The water turbine according to any one of claims 1 to 12, further comprising another cover that covers the openings of the plurality of buckets from the drainage space to the water receiving space along the rotation direction. apparatus.   14. The watermill device according to claim 13, wherein a stopper plate for stopping water drained into the drainage space is provided at an end of the other cover on the drainage space side.

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