JP2003021038A - Hydraulic power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic power generator having excellent power generation efficiency and durability, with a small and compact structure at a low cost. SOLUTION: This generator is constituted of a cylindrical housing 2 for storing a stator 3, a casing 10 for forming a flow passage 13 of fluid in a hollow part of the housing 2, and a rotor 15 provided with magnet part 20 and blade 21 rotatably arranged in the flow passage 13 within the casing 10 inside the stator 3. Fluid is made to flow into the flow passage 13 to rotate the rotor 15.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hydroelectric generator.

[0002]

2. Description of the Related Art FIG. 2 is a longitudinal sectional view showing an example of a conventional hydraulic power generator. In FIG. 2, the hydroelectric generator 30 includes a cylindrical waterproof frame 31, a first frame support 32, a second frame support 33, and a drainage port provided with a water outlet 35 arranged inside the frame 31. A third frame support 34 including 36 is fixed by sandwiching O-rings 48a, 48b, 48c, and is supported by the three frame supports and is housed in the frame 31 rotor 37 and stator 38.
And a flow path 47 is formed in the frame 31.

The rotor 37 includes a rotating shaft 39, an impeller 44 having a blade 44a fixed to the flowing water port 36 side of the rotating shaft 39, and a yoke 40 fixed to the drainage port 36 side of the rotating shaft 39. And a magnet 41 provided at the tip thereof
And a rotor portion 42 including
It is arranged on the center line of the hydroelectric generator 1 by the first frame support 32 and the third frame support 34 via 3b and is rotatably attached.

The stator 38, which constitutes the power generation portion, is composed of the iron core 4
4 and a winding wire 45 wound around the winding wire 4, and is provided inside the frame 31 along the outer circumference of the magnet 41, and a power transmission line 46 for sending generated power to the outside is wound around the winding wire 45.
Is connected to the end of. The stator 38 has a cylindrical waterproof cover 46 that covers the rotor portion 42 of the rotor 37 that is fixed by sandwiching the second frame support 33, the third frame support 34, and the O-rings 49a and 49b. Channel 4
It is blocked from 7 and waterproofed.

When water flows through the flow path 47 of the hydroelectric generator 30, the blades 4 provided on the impeller 44 due to water pressure.
Rotational force is generated in 4a, and this rotation causes the rotor portion 42 to rotate via the rotation shaft 39 and the magnet 41 and the stator 38 to induce electricity to generate electricity.

In the hydroelectric generator 30 having the above-described structure, the impeller 44 and the rotor portion 42 are separately arranged in the longitudinal direction of the rotating shaft 39 to form the rotor 37. There is a problem that the number of parts such as a support member and a cover for accommodating and supporting the child 37 and the stator 38 is large, the assemblability is deteriorated, and the cost is increased.

Further, the rotor portion 4 coaxial with the impeller 44
There is also a problem in that the load is also applied to 2 due to the water pressure, which exerts an influence to suppress the rotation of the impeller 44, which causes a rotation loss of the impeller 44 and reduces the power generation efficiency.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above problems and provides a hydropower generator having a small and compact structure, low cost, and excellent power generation efficiency and durability. The purpose is to provide.

[0009]

According to a first aspect of the present invention, there is provided a hydroelectric generator, wherein a cylindrical housing accommodating a stator, a casing forming a fluid passage in a hollow portion of the housing, and an inner side of the stator. In the above, it is composed of a rotor provided with a magnet unit and a blade rotatably arranged in a flow passage in the casing, and a fluid is caused to flow in the flow passage to rotate the rotor to generate electricity. To do.

A second aspect of the present invention is the hydroelectric generator according to the first aspect, wherein the cylindrical housing is formed of a molding resin and has the stator built therein.

According to this hydroelectric generator, the impeller portion provided with the blade for generating the rotary motion of the rotor and the magnet portion for generating the induced voltage in the generator are integrated to constitute the rotor, And since the above-mentioned integrated rotor can be arranged inside the casing inside the stator, a compact structure in which the rotor rotation function and the power generation function of the hydroelectric generator are integrated in one place, Enables downsizing of machines. Further, with the above structure, it is possible to reduce the number of components such as an outer shell frame and a supporting member such as a conventional generator and O-rings, screws and the like associated with the assembly.

Further, since the rotor is integrated and the size and weight are reduced, the rotatability of the rotor is improved, and further, the flow path in the casing is shortened to reduce the fluid loss, so that the rotation efficiency of the rotor is improved. The power generation efficiency can be improved.

Further, since the housing is formed of the molding resin and the stator and the substrate are built in, the waterproofness of the housing is improved and the influence of the vibration of the rotor is reduced, so that the electronic parts and the wiring are reduced. It is possible to prevent such damage and improve the durability of the hydroelectric generator.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view of a hydraulic power generator 1 of the embodiment. The hydroelectric generator 1 is composed of a housing 2 having a housing that houses the stator 3, a casing 10 that forms a flow path inside the housing 2, and a rotor 15 housed inside the casing 10.

The housing 2 is molded of a molding resin, and has a stator 3 formed of an iron core 6 and a winding 7 wound around the iron core 6 which constitutes a power generation portion of a hydroelectric generator, and regulates generated electric power. And a power transmission line 5 connected to this substrate 4 and guided to the outside of the generator 1
Is built in, and when the housing 2 is molded, the connection parts of the stator 3, the substrate 4, and the power transmission line 5 are simultaneously molded.

The casing 10 includes a casing (A) 8 having a drainage port 12 arranged inside the housing 2 and supporting one end of a fixed shaft 19, the casing (A) 8 and an O-ring 14. A casing (B) 9 having an inflow port 11 fastened by sandwiching and supporting the other end of the fixed shaft 19, forms a flow path 13 in the casing 10, and intrudes water into the housing 2. Water leakage to the outside of the generator 1 is prevented.

The rotor 15 includes a fixed shaft 19 and a fixed shaft 19
An impeller 18 rotatably supported and attached by bearings 17a and 17b and a thrust washer 16, a magnet portion 20 made of a magnetic material attached to an end portion of the impeller 18, and a blade 21 provided at its tip. It consists of

The fixed shaft 19 is clamped and fixed in both supporting portions of the casing (A) 8 and the casing (B) 9 so that the magnet portion 20 of the rotor 15 and the iron core 6 of the stator 3 face each other. There is.

As the magnetic body forming the magnet portion 20, an ordinary permanent magnet or a molded magnetic resin material having excellent wear resistance and impact resistance can be used. Furthermore, the impeller 1
It is also possible to use a structure in which the magnet 8 and the magnet portion 20 are integrally molded with the magnetic resin material.

When water flows in from the inflow port 11 of the hydroelectric generator 1, the water flow flowing in the flow path 13 applies water pressure to the blade 21 provided at the tip of the rotor 15 to cause the rotor 15 to make a rotational motion. Accordingly, the magnet portion 20 rotates, a magnetic field is generated in the stator 3 provided so as to face the magnet portion 20, an induced voltage is generated, power generation is started, and the electric power adjusted by the substrate 4 is transmitted through the transmission line 5 To the outside, and then the water flow is drained from the drainage port 12.

The hydroelectric generator 1 having the above-mentioned structure is provided with an impeller 1
8 and the magnet part 20 and the blade 21 are integrated to constitute the rotor 15 and are attached to the fixed shaft 19, and the rotor 15 is arranged inside the stator 3 so as to be on the same cross section of the hydroelectric generator 1. Since it is arranged, the internal structure of the hydroelectric generator 1 is made compact, and the distance between the rotor 15 and the stator 9 in the fixed axial direction of the electric generator 1 is greatly shortened. Miniaturization is realized.

Further, in this hydroelectric generator 1, not only the internal structure is made compact, but also the outer shell frame and the supporting members such as the conventional generator are reduced, and the O-rings and screws associated with the assembly are reduced. It becomes possible to reduce the number of parts such as, and further, the assembly process of the generator is simplified, and the cost of the hydroelectric generator 1 can be reduced.

Further, with the above structure, the rotor 15 has integrated functions and is small and lightweight, and the flow path 13 in the casing 10 is significantly shortened as compared with the conventional one, and the water flow is simplified and easy to flow. The rotation loss of the rotor 15 does not occur, the rotation efficiency of the rotor 15 is improved, and the power generation efficiency can be improved.

Further, the housing 2 is molded with a molding resin having excellent water resistance and insulation such as epoxy resin,
Since the stator 3, the substrate 4, and the transmission line 5 are built in the inside thereof, not only does an outer shell frame like a conventional generator become unnecessary, but also water enters from a gap of the casing 10. Prevents electric leakage and corrosion due to rust, and also rotor 1
5, the breakage in the stator and damage to parts due to the vibration of 5 are prevented,
The durability of the hydroelectric generator 1 can be improved.

Therefore, according to the present invention, a very small size and high efficiency,
It is possible to obtain a hydroelectric generator that has high reliability and realizes cost reduction.

In the above embodiment, the hydroelectric generator in which the stator is built in the housing molded by the molding resin has been described, but the housing is formed by the outer shell made of steel plate or aluminum die-cast, and the inside thereof is formed. Even in a hydroelectric generator that houses a stator, it is possible to satisfy various performances such as the above small size and cost reduction.

[0028]

As described above, according to the hydroelectric generator of the present invention, it is possible to make the generator compact by having a compact structure, and also it is excellent in power generation efficiency and has high durability and high reliability. It is possible to provide a low-cost hydroelectric generator that achieves high performance.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a hydroelectric generator according to an embodiment.

FIG. 2 is a vertical cross-sectional view of a conventional hydroelectric generator.

[Explanation of symbols]

1 ... Hydroelectric generator 2 ... Housing 3 ... Stator 8: Casing (A) 9 ... Casing (B) 10 ... Casing 13 ... Channel 15 ... rotor 18: Impeller 19: Fixed axis 20 ... Magnet part 21 ... Blade

Continued front page    F term (reference) 3H072 AA06 AA26 BB07 BB31 CC01                       CC42 CC95                 5H605 AA02 AA07 BB02 BB10 BB17                       CC01 CC02 CC03 CC04 CC05                       CC10 DD05 DD09 DD13 DD16                       DD32 EB01 EB16 FF06 GG04                       GG06 GG18                 5H607 AA05 AA12 BB02 BB07 BB14                       BB26 CC01 CC03 CC05 DD03                       DD08 DD19 FF27 GG07 GG11                       JJ01 JJ05 JJ06 JJ10

Claims (2)

[Claims] 1. A tubular housing accommodating a stator, a casing for forming a fluid passage in a hollow portion of the housing, and a rotor inside the casing and rotatable in a passage in the casing. A hydropower generator, comprising a magnet unit disposed in a rotor and a rotor provided with a blade, wherein a fluid is caused to flow in a flow path to rotate the rotor to generate electric power. 2. The hydroelectric generator according to claim 1, wherein the tubular housing is formed of a molding resin and has the stator built therein.