WO2020027280A1

WO2020027280A1 - Hydroelectric power generation device

Info

Publication number: WO2020027280A1
Application number: PCT/JP2019/030290
Authority: WO
Inventors: 智哉川合; 近藤　博光
Original assignee: Ntn株式会社
Priority date: 2018-08-02
Filing date: 2019-08-01
Publication date: 2020-02-06
Also published as: KR102656516B1; CN112513452A; JP2020020315A; CN112513452B; KR20210037664A; JP7011550B2

Abstract

A hydroelectric power generation device of the present invention is provided with: a hydroelectric power generation module (3) having a water turbine (2) and a generator (8); a pair of water passage fixing bodies (11, 11) respectively installed on both shoulders of a water passage (1); a rotary beam (14) rotatably supported at both ends by bearing units (13, 13) that are installed on the water passage fixing bodies (11, 11) and have aligning properties; and a rotary frame (6) which is connected to the rotary beam (14) and supports the hydroelectric power generation module (3), and which is capable of rotating vertically between a submerged state, in which the lower end of the water turbine (2) is below the water surface, and a waiting state, in which the entirety of the water turbine (2) is above the water surface. A lubricant for the bearing unit (13) is a heat-solidifying grease for food machinery.

Description

Hydroelectric generator

Related application

This application claims the priority of Japanese Patent Application No. 2018-145904 filed on Aug. 2, 2018, which is incorporated by reference in its entirety as a part of the present application.

The present invention relates to a hydroelectric power generator installed in a waterway such as an agricultural waterway, water supply and sewerage, an industrial waterway, and a small river, and more particularly to an improvement in lubrication in a mechanism for lifting from the waterway.

A hydroelectric generator is a system that uses kinetic energy of flowing water for power generation. Among these hydroelectric generators, small ones are installed and used in waterways for agricultural water or the like (for example, Patent Document 1). In the case of a hydroelectric generator installed in such a water channel, it is necessary to raise the water turbine from the water channel when replacing a rotor, gears, oil seals, etc. for maintenance. In addition, in the event of an emergency such as flooding, it is necessary to lift up the waterway to prevent flooding and damage to the hydroelectric generator.
Conventionally, when lifting a hydroelectric generator from a water channel, using a lifting mechanism, a manual lever, a sliding screw, etc., installed on the hydroelectric generator instead of a crane truck, rotate the gantry supporting the hydroelectric module and pull it up I was

熱 Meanwhile, a heat setting type grease for a food machine is disclosed in Patent Document 2 and the like.

JP 2015-14219A JP 2016-180476 A

The bearing used for the rotating beam (shaft) for rotating the gantry is a bearing unit having an aligning property because the rotating beam flexes due to the load fluctuation on the turbine blade due to the weight and flow velocity fluctuation of the hydroelectric module loaded on the rotating beam. Is desirable.
However, it is difficult to prevent grease from leaking from inside the bearing even if a shield plate is attached due to a temperature difference between day and night. On the other hand, the bearing that supports the rotating beam is disposed immediately above the water channel or immediately adjacent to the water channel wall. Therefore, if grease leaks, the water is contaminated.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a hydraulic power generation module capable of preventing contamination of service water due to leakage of a lubricant while ensuring smooth rotation between a submerged position and a standby position of a hydroelectric module. It is to provide a power generation device.

A hydraulic power generation device according to the present invention includes a water turbine, a hydroelectric power generation module having a generator for generating power by rotation of the water turbine, a pair of waterway fixed bodies installed one at each shoulder of the waterway, and a waterway fixed body. A rotary beam rotatably supported at both ends by an installed bearing unit having an aligning property, and a lower end of the water turbine which is joined to the rotary beam to support the hydraulic power generation module, and a lower end of the water wheel is located below a water surface of the waterway. A submersible attitude and a rotating gantry that can rotate up and down over a standby attitude in which the whole of the water wheel is located above the water surface of the waterway,
The lubricant for lubricating the bearing unit is a heat-solidified food machine grease.

According to this configuration, since both ends of the rotating beam are supported by the bearing units having an aligning property, the rotating beam is bent by the load fluctuation received by the water turbine blade due to the weight or flow velocity fluctuation of the hydroelectric module loaded on the rotating beam. , Smooth rotation can be obtained due to the alignment of the bearing unit.
As the lubricant, a heat-solidification type food machine grease is used, and since it is in a solid state after being filled into the bearing unit, it is unlikely to leak even if there is a temperature difference between day and night, and in the unlikely event that it occurs. Even if leakage occurs, it is used for food machinery, so no harm to humans and living organisms due to contamination of water is caused.

In the present invention, one end of the rotary beam may be connected to a rotary drive device via a coupling, and the lubricant of the rotary drive device may be a thermosetting grease for a food machine.
When the rotary beam is rotated by the rotary drive device, it is easy to change the attitude between the submerged attitude and the standby attitude, but a problem due to leakage of the lubricant in the rotary drive apparatus occurs similarly to the bearing unit. However, if heat-solidifying grease for food machinery is also used as the lubricant for the rotary drive, it is difficult for grease to leak, and even if leaks occur, contamination of the water will cause damage to the human body and organisms. No harm occurs.

When connecting a rotary drive, the coupling for the connection may be a chain coupling, and the lubricant of the coupling may be a heat-solidifying type grease for a food machine.
When a chain coupling is used to connect the rotary drive, even if the rotary beam is bent and the bearing of the bearing unit is aligned and tilted, the chain coupling can absorb the tilt and apply an offset load to the adjacent rotary drive. Absent. That is, by adopting this configuration, the rotary drive device (for example, its speed reducer) operates smoothly. Chain couplings require lubrication, but heat-solidifying food machine grease is also used as the lubricant, so even the chain coupling lubricant is unlikely to leak, and In addition, no harm to human bodies and living organisms due to contamination of water is caused.

Any combination of at least two configurations disclosed in the claims and / or the specification and / or the drawings is included in the present invention. In particular, any combination of two or more of the following claims is included in the present invention.

The present invention will be more clearly understood from the following description of preferred embodiments thereof with reference to the accompanying drawings. However, the embodiments and figures are for illustration and description only and should not be used to define the scope of the invention. The scope of the invention is defined by the appended claims. In the accompanying drawings, the same part numbers in a plurality of drawings indicate the same parts.
FIG. 2 is a perspective view illustrating a submerged posture of the hydroelectric power generator according to the first embodiment of the present invention. It is a perspective view which shows the standby attitude | position of the same hydroelectric generator. It is a perspective view which shows the submersion attitude | position in the installation state of the same hydroelectric generator in a waterway. It is a perspective view which shows the attitude | position in the middle of the raising in the installation state of the same hydroelectric generator in a waterway. It is a fracture | rupture perspective view of an example of the bearing unit in the same hydroelectric generator. It is sectional drawing which shows an example of the chain coupling in the same hydroelectric generator. It is a perspective view in the state where the mounting position of the hydraulic power generation module of the same hydraulic power generation device was changed. It is a perspective view in the state where the counterweight was attached to the hydroelectric generator. It is a perspective view of the hydraulic power generator concerning a 2nd embodiment of this invention.

A first embodiment of the present invention will be described with reference to FIGS.
<Schematic configuration of the entire hydroelectric generator>
As shown in FIG. 3, the hydraulic power generation device is installed in a water channel 1 and generates power by rotating a water turbine 2 by a water flow. The waterway 1 is an agricultural waterway, an industrial waterway, a small river, or the like. In the example of FIG. 1, the waterway wall is composed of a bottom wall 1a made of concrete or the like and

side walls

1b, 1b on both sides.
This hydraulic power generation device includes a hydroelectric power generation module 3 and a support device 4 that supports the hydroelectric power generation module 3 on the water channel 1. The support device 4 includes a pair of

waterway fixing bodies

11, 11 installed one by one on both shoulders of the waterway 1, and the aligning

bearing units

13, 13 installed on these

waterway fixing bodies

11, 11 at both ends. A rotating beam 14 rotatably supported, and a submerged posture in which the lower end of the water wheel 2 is lower than the water surface S of the water channel 1 and the entirety of the water wheel 2 And a rotating gantry 6 that can rotate up and down over a standby posture located above the water surface S of the water channel 1. The pair of

waterway fixing bodies

11 and 11 are connected to each other by a connecting member 12 to form the fixing base 5. One end of the rotating beam 14 is connected to a rotation driving device 15 by a coupling 16.

<About hydroelectric module 3>
As shown in FIG. 1, the hydraulic power generation module 3 includes a water turbine 2 and a generator 8 that generates power by rotation of the water turbine 2. The generator 8 is, for example, a permanent magnet synchronous type.
The water wheel 2 is normally provided in a state of being immersed in flowing water in the water channel 1, and converts hydraulic power into rotational power. The water wheel 2 is a propeller type in which the rotation axis O1 is parallel to the direction of the water flow in the water channel 1, and has a plurality of (five in the illustrated example) blades 2a extending radially around the rotation axis O1. ing. As for the direction of the water wheel 2, the front is directed to the upper side of the water flow, and the gear box 9 is located on the rear side.

回転 The rotating shaft (not shown) of the water wheel 2 is rotatably supported by bearings (not shown) installed in the gear box 9. The rotation of the water wheel 2 is accelerated by a gear train (not shown) such as a bevel gear meshing in the gear box 9. Grease is sealed in the gear box 9. The output shaft of the gearbox 9 is connected to a shaft (not shown) of the generator 8 via a transmission shaft (not shown) in a support cylinder 10 extending in the vertical direction.

<Revolving beam 14 and rotating frame 6>
The rotary beam 14 is formed of a square pipe, and circular portions in cross section of supported parts attached to both ends are rotatably supported by the bearing unit 13.
The rotary gantry 6 is a frame-shaped gantry that is cantilevered and attached to the side surface of the rotary beam 14. The rotating gantry 6 has two parallel

cantilever frame members

18, 18 each having a base end joined to a side surface of the rotating beam 14 by welding or the like, and an installation plate spanned between the

cantilever frame members

18, 18. 19. The two

cantilever frame members

18, 18 are made of an angle material or the like, and are provided facing upward on the inside.
The generator 8 is installed in a direction perpendicular to the installation plate 19 by a generator base 20 mounted on the installation plate 19. The support cylinder 10 is attached to a lower surface of the installation plate 19.

<Module position changing means 31 and moment increasing means>
Means for alleviating the influence of the water flow in the water channel 1 when the hydraulic power generation module 3 is vertically rotated to raise the water wheel 2 to the standby position, or when the water turbine 2 is submerged from the standby position to the submerged position. A means for increasing the moment of the rotating gantry 6 facing the water flow is provided. As the moment increasing means, there is provided a module position changing means 31 capable of changing a mounting position of the hydroelectric power generation module 3 in a direction far from the rotation axis O of the rotating gantry 6. Specifically, the module position changing means 31 is provided on the

cantilever frame members

18, 18 of the rotating gantry 6 side by side in the frame length direction, and has a plurality of mounting holes selectively used for mounting the hydroelectric module 3. 33. FIG. 1 shows a state in which the modified hydroelectric module 3 is installed closest to the rotation axis O, and FIG. 7 shows a state in which the modified hydroelectric module 3 is installed farthest from the rotation axis O.

<About the rotation drive device 15>
The rotation drive device 15 is a device that rotates the hydroelectric module 3 between the submerged posture and the standby posture, and rotates the rotating beam 14 in the forward and reverse directions within a range of, for example, 90 °. The rotation drive device 15 is composed of an electric motor and a speed reducer (neither is shown) for reducing the rotation of the motor, and is installed on a rotation device receiving base 17 installed on the waterway fixing frame 11. ing. The bearing unit 13 on the side of the rotation drive device 15 is installed on the rotation device receiving base 17.
The output shafts of the motor and the speed reducer are concentric with the rotation axis O of the rotation beam 14. In the speed reducer of the rotation drive device 15, a heat-solidifying food machine grease is sealed as a lubricant.
Positioning means (not shown) such as a stopper or a lock mechanism for positioning the hydroelectric power module 3 in the submerged attitude and the standby attitude, or further fixing the hydroelectric power module 3 in the positioned state, is provided by the fixed base 5 and the rotating beam 14. It may be provided between them.

<About the bearing unit 13>
The bearing unit 13 has a configuration in which a rolling bearing such as a ball bearing is provided in an axle box such as a pillow type, and has a centering function.
FIG. 5 shows an example of the bearing unit 13. In this bearing unit 13, the spherical outer peripheral surface of the outer ring 36 of the rolling bearing 35 is slidably fitted on a concave spherical bearing fitting surface 34 a formed on the inner periphery of a pillow-shaped shaft box 34. As a result, it has a centering function. In the rolling bearing 35, a rolling element 38 such as a ball is interposed between the inner ring 37 and the outer ring 36. The rolling element 38 is held in a pocket of a retainer 39, and both ends of a bearing space between the inner ring 37 and the outer ring 36 are sealed with seals 32. A thermally solidified food machine grease is sealed in the bearing space as a lubricant.

<About the coupling 16, FIG. 6>
A chain coupling is used as the coupling 16. The chain coupling has a configuration in which, for example, two rows of

roller chains

41, 41 are wound around two concentric and

rotatable sprockets

42, 42 as shown in FIG. Flexible rotation transmission by clearance. In this example, a supported part 43 at the end of the rotating beam 14 (see FIG. 1) is connected to one of the

sprockets

42, 42, and the other of the

sprockets

42, 42 is connected to the output shaft of the rotary drive device 15. The output shaft 44 of the speed reducer is connected, and the pair of

shafts

43 and 44 are connected as one shaft. The

sprockets

42, 42 and the roller chain 41 are housed in a case 45, and a heat-solidified food machine grease is sealed in the case 45 as a lubricant.

<About heat-solidifying food machine grease>
The heat setting type grease is a grease containing a resin such as ultra-high molecular weight polyethylene and a grease component as main components, has fluidity in an initial state, and has a property of being cured by applying heat. The heat setting type food machine grease is one in which the food setting grease is used as the grease component of the heat setting type grease.
As a product of the heat setting type grease, there is a polyloop (registered trademark), and as one type of the polyloop, there is a type for a food machine. The heat-solidified polyloop for food machines uses ultrahigh molecular weight polyethylene as a resin and urea-synthetic oil-based grease as a grease component.

<Action>
According to this configuration, as shown in FIGS. 1 and 3, the water turbine 2 is normally in a submerged posture in which the water turbine 2 is immersed in the flowing water of the water channel 1, and the generator 8 is rotated by the water turbine 2. Generate electricity.
When pulling up from the water channel 1 for maintenance or safety at the time of increasing the water level, the rotary gantry 6 is rotated by 90 ° by the rotary drive device 15, and the hydraulic power generation module 3 is set to a horizontal standby posture as shown in FIG. FIG. 4 shows the attitude of the rotating gantry 6 during rotation.

When the posture is changed as described above, since both ends of the rotating beam 14 on which the hydroelectric module 3 is mounted are supported by the bearing units 13, the weight and the flow velocity of the hydroelectric module 3 loaded on the rotating beam 14 change. Even if the rotating beam 14 bends due to the load fluctuation received by the water turbine 10, smooth rotation can be obtained due to the alignment of the bearing unit 13.
As a lubricant for the bearing unit 13, a thermally solidified food machine grease is used, and after filling into the bearing unit 13, the grease is in a solid state, so that leakage hardly occurs even when there is a temperature difference between day and night. Even if a leak occurs, it is used for food machinery, so that no harm to humans and living organisms due to contamination of the water is caused.

Since one end of the rotary beam 14 is connected to the rotary drive device 15 via the coupling 13, it is easy to change the position between the submerged position and the standby position, but leakage of the lubricant in the rotary drive device 15 may occur. I am concerned. However, since heat-solidifying food machine grease is also used for the lubricant of the rotary drive device 15, it is difficult for the grease to leak, and even if the leak occurs, it may damage human bodies and organisms due to contamination of the water. No harm occurs.

Since the coupling 13 uses a chain coupling, even if the rotating beam 14 is bent for the above-described reason and the bearing of the bearing unit 13 is aligned and tilted, the coupling 13 absorbs the tilt and the adjacent rotation An unbalanced load is not applied to the driving device 15. That is, by adopting this configuration, the rotary drive device 15, for example, its speed reducer operates smoothly. Although the chain coupling 16 requires lubrication, since a heat-solidifying type food machine grease is also used as the lubricant, leakage of the lubricant of the chain coupling 13 is unlikely to occur. Even if it occurs, there is no harm to human bodies and living organisms due to contamination of water.

(4) The module position changing means 31 (FIG. 1) serving as the moment increasing means has the following effects. If the holding of the submerged posture is released when the hydroelectric module 3 is lifted from the submerged posture to the standby posture, the hydroelectric module 3 may be suddenly lifted by the moment due to the water flow in the water channel 1 and endures this sudden lifting operation. Therefore, it is necessary to increase the strength of each part. This problem becomes significant when the flow velocity is high. Further, if the flow velocity is high, it may be difficult to rotate the hydroelectric power module 3 from the standby position to the submerged position. In such a situation of the water channel 1 and its water flow, the hydroelectric power generation module 3 is attached to the tip of the rotating gantry 6 by the module position changing means 31 as shown in FIG. Thereby, the moment of the rotating gantry 6 against the water flow increases due to the own weight of the hydroelectric power generation module 3, so that the sudden lifting at the time of lifting to the standby position can be eased, and the operation of rotating from the standby position to the submerged position can be performed. Is easier to do.

As the moment increasing means for increasing the moment against the water flow in the water channel 1, a counter weight 7 may be provided instead of the module position changing means 31 as shown in FIG.

It should be noted that, as in the second embodiment of the present invention shown in FIG. 9, the rotating gantry 6 is replaced with the hydraulic power generation module 3 as shown in FIG. Very good with the minimum length that can be installed in the condition.

As described above, the preferred embodiment has been described with reference to the drawings. However, those skilled in the art will easily envisage various changes and modifications within the obvious scope by referring to the present specification. Accordingly, such changes and modifications are to be construed as being within the scope of the invention as defined by the appended claims.

DESCRIPTION OF SYMBOLS 1 ... Water channel 2 ... Water turbine 2a ... Wing 3 ... Hydroelectric power generation module 4 ... Support device 5 ... Fixed base 6 ... Rotating stand 7 ... Counter weight 8 ... Generator 9 ... Gear box 10 ... Support cylinder 11 ... Water channel fixed body 12 ... Connecting material 13 ... Bearing unit 14 ... Rotating beam 15 ... Rotation driving device 16 ... Coupling 18 ... Cantilever frame material 19 ... Installation plate 20 ... Generator table 31 ... Module position changing means O ... Rotation axis

Claims

A water turbine, and a hydroelectric power generation module having a generator that generates power by rotation of the water turbine, and a pair of waterway fixed bodies installed one at each shoulder of the waterway,
A rotating beam rotatably supported at both ends by a bearing unit having an aligning property installed on these waterway fixed bodies,
A submerged posture in which the lower end of the water turbine is positioned below the water surface of the waterway, and a standby posture in which the entirety of the waterwheel is positioned higher than the water surface of the waterway, which is joined to the rotating beam and supports the hydroelectric module. With a rotating base that can rotate up and down,
A hydraulic power generator, wherein the lubricant for lubricating the bearing unit is a thermosetting grease for a food machine.
2. The hydraulic power generator according to claim 1, wherein one end of the rotary beam is connected to a rotary drive device via a coupling, and a lubricant of the rotary drive device is a thermosetting grease for a food machine. Power generator.
The hydraulic power generator according to claim 2, wherein the coupling is a chain coupling, and a lubricant of the coupling is a thermosetting grease for a food machine.