Immersion hydro-energy turbine with floating chambers

FIELD: power industry.

SUBSTANCE: hydraulic turbine of immersion type includes rotor 20, housing-stator that is integrated into rotor 20 and electricity generating means. Rotor 20 has outer rim 22 that encircles the blades 21. There is one or more floating chambers 60 located in outer rim.

EFFECT: rotor weight reduction for floating obtaining.

6 dwg

 

PRIOR art

The present invention relates in General to turbine or generator that produces electricity from the energy of water flow, regardless of whether the stream is unidirectional, as in river and ocean currents, or bidirectional, as in tidal currents, and relates in particular to such a device in which the fluid flow causes the rotation of the large propeller-type rotor with an external annular rim located in a large circular building. More specifically the invention relates to such a device in which the turbine is fully immersed in water.

Generate electricity using turbines is well known. Typically turbines installed in the dam so that a controlled flow of fluid causes the rotation of a propeller-type rotor or impeller. Such conditions with a relatively rapid flow of water are referred to as high-pressure. There is also the practice of turbines in low-pressure conditions, which are created by tidal currents in the Bay, when installed in the mouth of the river or in the open sea.

Although most turbines have a Central rotating shaft, on which is mounted the blades or vanes, also known turbine with a hollow center, otherwise known turbines with ring suspension. Such turbine in which the blades are set the go between the inner and outer annular rims, and the energy is transferred to the circular housing that holds the rotor, through the outer rim, can be particularly effective in conditions of low pressure, i.e. at a relatively slow currents.

Examples turbines with a hollow center and ring suspension blades are available in U.S. patent No. 5592816 issued 14.01.1997 and periyanna number RE 38336 from 02.12.2003, in U.S. patent No. 6648589 from 18.11.2003, in U.S. patent No. 6729840 from 04.05.2004 and in the application for U.S. patent US 2005/0031442 published 10.02.2005 (serial number 10/633865). Examples of hydropower turbines used at low pressure (tidal currents)are available in U.S. patent No. 4421990 issued Houssou and others (Heuss et al.), in U.S. patent No. 6168373 and No. 6406251 issued Vautier (Vauthier), in the patent of great Britain No. GB 2408294, registered Sasenum and others (Susman et al.), and in the International WIPO publications WO 03/025385 registered by Davis and others (Davis et al.).

Turbines are considered as an environmentally friendly replacement power generators that use fossil fuels or nuclear energy. When using wind power or water on a large scale, when produced electricity should be enough to supply industrial complexes, large and small cities, etc. requires a lot of turbines, and as large as possible to maximize the amount of electricity produced by ka the water turbine. The length of the blades on the impeller of these turbines reaches several meters in some experimental designs provided by the blades longer than 50 meters.

With increasing length of the blades, there are problems of design and production that are not met in a smaller turbines and generators. For turbines with axial suspension difficult to get long blades were both strong and light. This problem is solved in the case of turbines with ring suspension, since there are both ends of the blades are attached to the annular support, and the outer rim is held in the housing, having an annular groove or channel. To generate electricity at the perimeter of the outer rim is a large number of magnets, and on the surface of the channel in the housing (which plays the role of the stator) is a large number of windings. The magnetic field formed by the field system of the rotor overlaps the gap between the rotor and stator. When the rotor of an alternating magnetic field acts on the winding that generates an electromotive force in the windings.

In turbines with ring suspension, the weight of the rotor is perceived lower part of the body because there is no Central shaft, which could serve as a support. For large turbines the load and the resulting friction can be significant as at the moment of starting of the rotor, and t is his view of the overall efficiency of the turbine after ramp-up. Greater weight of the rotor leads to increased resistance to rotation, that is, to overcome the forces of inertia and friction requires a greater flow of liquid. This problem is especially acute for turbines operating at low pressure.

The purpose of the present invention is to provide improved construction of hydropower turbines, in which the weight of the rotor is reduced so that it becomes buoyant. Another objective is to provide a turbine in which weight reduction is achieved due to the presence in the rotor of the buoyancy chambers, allowing the turbines submerged in water, the negative effect due to the large weight of the rotor is reduced or overcome due to the increased buoyancy of the rotor.

The INVENTION

The invention represents an improvement turbines of this type in which the rotor blades rest on the outer rim, and the rim is enclosed in the housing with the annular channel, in which is placed the external rim. In a typical execution of the turbine is a generator, in which on the outer rim of the rotor are magnets, and in the channel on the inner surface of the housing or stator are winding, and as the rotor turns inside the stator generates electricity. Turbine, particularly of a type which is immersed in water.

The improvement of the offer once edenia in the case of a floating rotor. In a preferred implementation, the turbine rotor provided with one or more buoyancy chambers, which are located in the outer and/or inner annular rim and/or the blades, making the total weight of the rotor is reduced and, in addition, the buoyancy of the rotor increases. The camera can be filled with air, other gases, liquids, foam, solid or any other material with a specific gravity not more than 1. For greater structural integrity and rigidity of the impeller chamber buoyancy can be filled with a polymer foam.

BRIEF DESCRIPTION of DRAWINGS

Figure 1 in the axial projection shows a typical turbine with a hollow center and ring suspension of the blades, comprising a rotor with the outer rim and housing-stator channel, in which is placed the outer rim of the rotor.

Figure 2 presents a view of the housing of the stator in a perspective view.

Figure 3 presents a view of the rotor in a perspective view.

4 shows a partial section of the outer annular rim of the rotor.

Figure 5 presents a partial section of the housing of the stator.

Figure 6 presents a partial section of the inner annular rim of the rotor.

DETAILED description of the INVENTION

Below the invention in the best mode and the preferred implementation will be described in detail with reference to the drawings. In the most General sense, the invention is a hydro is Energetichesky submersible turbine type rotor, accommodated in the housing acting as a stator, the rotor has an outer annular rim that is placed and held in the annular channel or groove in the housing, and the impeller gives it buoyancy. The generator contains a collection of a large number of magnets on the annular rim of the rotor, and a large number of windings on the inner surface of the housing of the stator, preferably within the channel, in which is placed an annular rim of the impeller, although can be used by other generating devices. For illustrative purposes, the turbine in the drawings is shown with a rotor ring suspension and a hollow center so that the weight of the rotor is completely absorbed by the body, but it is understood that the invention also applies to turbines with rotor axial suspension with an external annular rim. In this document the term "buoyancy" means that the corresponding object does not sink in the water, in which he shipped that may apply to fresh or sea water. Referred to in this document scientific definition of buoyancy, which relates this concept with a specific gravity not exceeding the unit, you should understand the expansion, including the situation when the actual water density differs from the density of pure water.

As generally shown in Figures 1 to 3, the invention of t is made by a turbine or generator 10, which contains in General the shape of the ring body 30, performs the function of the stator. The configuration of the housing 30 is not limited to the one shown here, that is, there may be other configuration, provided that the housing 30 performs, among others, the function of holding the rotating Assembly of the rotor 20 from undesirable movement in both directions along the axis and provides the rotation of the rotor 20 relative to its axis. The housing 30 has a pair of mounting flanges 31, which form a channel 32 of the hull where placed and held on the rotor 20.

The rotating Assembly, or rotor 20 has an inner annular rim 23 and the outer annular rim 22. Between the inner rim 23 and the outer rim 22 is a set of racks, blades or vanes 21, and the blade 21, according to known solutions, are at such an angle or curved so that the flow of fluid through the housing 30 in the axial direction causes rotation of the rotor 20. The number, configuration and material of the blades 21 may be different, but it is desirable that the blades 21 were so light as possible without compromising the structural integrity of the structure.

The housing 30 and the rotor 20, taken together, constitute the generator. This can be achieved by placing a set of magnets 41 on the outer surface of the outer rim 22 and the aggregate winding 42 on the inner surface the surface 34 of the housing 30 and channel 32 in the housing, so that the housing 30 will turn into a stator of the generator. When the rotor 20 magnets 41 move past the windings 42, which leads to production of electricity in a known manner.

Due to the large size of the turbine 10, it is desirable that it be made of relatively light but strong materials. From this point of view it is expedient in the manufacture of turbine to be used as primary structural components of the rotor 20 and the housing 30 polymers, epoxy, resin, reinforcing fibers or similar materials. In a typical case, the rotor 20 may be mainly made of lightweight materials listed above, so that they can be embedded magnets 41 and other components. In the manufacture of the rotor 20 should ensure its buoyancy when immersed in water.

In one of the implementations in the rotor 20, for example, inside the outer annular rim 22 is made of one or more chambers 60 buoyancy, as shown in Figure 4. In a preferred implementation around the outer annular rim 22 passes one annular chamber 60, but can also be used multiple cameras 60, which are located one behind the other in axial or radial direction. If you are using multiple cameras, their location around the circumference must be balanced so as not to adversely affect the rotation of the rotor 20. Inside the chambers 60 PLA is uchesti to increase rigidity of the outer annular rim 22 can be located not shown here, structural elements, for example ribs. Camera 60 buoyancy can be filled with air or other gas, liquid or hard light elements from a material having a specific gravity not exceeding the unit, but it is most preferable to fill the chamber 60 of the floating material 61, with useful structural characteristics, such as polymer foams. Prepolymer, for example polyurethane, pre-molded and placed in the chamber 60 buoyancy or Inuktitut into the chamber 60, preferably this material must adhere to the inner surface of the chamber 60 after curing. The rigidity of the foam and the strength of its coupling with the walls of the chamber 60 buoyancy positively contribute to the overall rigidity and structural integrity of the rotor 20. The dimensions of the chambers 60 buoyancy and buoyancy material 61 is chosen to provide the desired degree of buoyancy in these particular circumstances. For example, under certain circumstances, it may be desirable simply to reduce the weight of the rotor 20, while in other circumstances it may be preferable to reduce the weight of the rotor 20 to such an extent that he acquired zero buoyancy, and in different circumstances it may be preferable to reduce the weight of the rotor 20 to such an extent that it had a positive buoyancy in water, and it will be vspl the VAT in the channel 32 of the stator and all the friction will occur in the upper part of the channel 32.

Instead of cameras 60 buoyancy in the annular outer rim 22 or along with them similar cameras 60 buoyancy can be located in the inner annular rim 23 and/or the blades 21, as shown in Fig.6. As mentioned above, the camera 60 of the buoyancy of the inner annular rim 23 and the blades 21 can be filled with air or other gas, liquid or hard light elements from a material with a specific gravity not exceeding the unit, but it is most preferable to fill the chamber 60 of the floating material 61 having a positive structural characteristics, such as polymer foams.

Due to this negative effect of friction observed between the rotor 20 and the housing 30 due to the significant weight of the rotor 20, is reduced or eliminated, so that starting of the rotor is performed with less effort and increases the efficiency of the rotation.

Under certain circumstances, it may be desirable to reduce the weight of the housing 30, for example, when the turbine must be floating. As shown in Figure 5, the housing 30 can accommodate one or more cameras 60 buoyancy, which are filled with floating the filling material 61, for example, cured in place of applying a polymer foams or any other material as described above, preferably one that provides rigidity and structural integrity to the of Cusa 60. Since the housing-stator 30 is a fixed element of the turbine 10, the camera buoyancy 60 is most preferably positioned in the upper part of the housing of the stator 30 in order to increase the stability of the turbine 10 in the water.

It should be borne in mind that the experts in the art can easily find equivalents and substitutes for some of the items listed above, but because the actual volume and the claims are as they are presented in the following paragraphs.

1. Hydraulic submersible turbine type, containing the rotor housing-stator, in which is enclosed the specified rotor, and means to generate electricity, and the specified rotor has an outer rim, covering the blade, characterized in that the specified outer rim, there is one or more of the buoyancy chambers.

2. Turbine according to claim 1, characterized in that the said blades are one or more of the buoyancy chambers.

3. Turbine according to claim 1, characterized in that the rotor includes an inner rim located on said blades, and with the specified internal rim are one or more of the buoyancy chambers.

4. Turbine according to claim 1, containing a floating infill material, which is located in said one or more buoyancy chambers.

5. Turbine according to claim 4, characterized in that the floating material is ial group-filler has a specific gravity, not greater than one.

6. Turbine according to claim 4, characterized in that the specified floating infill material contains a gas, preferably air.

7. Turbine according to claim 4, characterized in that the specified floating infill material contains a polymer foams.

8. Turbine according to claim 1, characterized in that the said one or more of the buoyancy chambers are held throughout the specified rotor.

9. Turbine according to claim 1, characterized in that the said one or more of the buoyancy chambers include several chambers located side by side.

10. Turbine according to any one of claims 1 to 8, characterized in that the said one or more of the buoyancy chambers include several chambers arranged end to end.



 

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