Submersible monoblock microhydro power plant

FIELD: electricity.

SUBSTANCE: submersible microhydro power plant for electric energy generation includes hydraulic turbine with vertical rotation axis connected to electric generator, also it includes water flow formers and device protecting against floating objects. Lower end of runner shaft 3 is connected directly to generator shaft 17 by means of splined joint. Thrust bearing of runner is rigidly fixed in upper cover of electric generator housing 15 so that it is simultaneously a pilot bearing for electric generator. Electric generator is end-type, water-filled and is located under hydraulic turbine. Hydraulic turbine housing 1 and electric generator housing 15 form single structure monoblock.

EFFECT: reducing dimensions and weight, generating cheaper electric energy due to absence of investments to plants building, simplifying structure and erection works method, reducing maintenance costs.

2 dwg

 

The invention relates to small hydropower and is designed to convert the kinetic energy of the flow of water into electricity, it can be used for electricity consumers, geographically remote from power lines and situated on the banks of small and medium rivers, farms, mills, bakeries, small production, Ministry of defence.

Known hydro generator, comprising a housing with inlet and outlet ports, installed in the housing of the impeller in the form of a conical console, the top of which is installed on the thrust bearing and the base attached to the rotor of the generator. The rotor is constructed in the form of circular bridge placed on it by the electromagnets. The rotor is fixed by means of centering bearings. Stators, centering bearings secured to the footings around the circumference (see SU 1828941 A1, 23.07.1993, F03 17/06).

The disadvantages of the proposed device are large size and weight, the presence of foundations for stators and centering bearing case base, the outlet and inlet channels, support bearing, which entails significant capital expenditures.

Known run-of-river small hydro power plants designed to produce electricity from the generator akregatowarning performance. The station contains placed in the river channel on the base plate gidrokoleso with a vertical shaft, confused and diffuser channels, the side wall. The generator is placed in the river (see baltrusaitis, V.V. run of River hydroelectric power plant for the needs of the defense Ministry. Collection of scientific papers of University staff/VITA - S. p., 2008, - p.260-269). The disadvantage of hydropower that converts the mechanical energy of flowing water into electrical energy is the need of construction works associated with the installation of a turbine on the Foundation on the bottom of the river and the device special channel containing two or three walls in the river. Hydrotechnical works in the construction of these objects is time consuming and expensive. The cost of construction increases with the necessity of construction works for installation on the banks of the generator above the water level.

Hydroelectric known to convert kinetic energy of water into electrical power (see EN 2256092 C2, 10.07.2005, F03 13/00)containing on the frame of the turbine, through the transmission gear and shaft connected to the generator, the driver thread and the protective device from the floating objects. Kinematic device comprises a bevel gear with an intermediate vertically and horizontally mounted shafts with bearings, Overdrive gearbox. Not what the rest of the unit is that it is by design and is not adaptable to production. The presence of kinematic pairs, a large number of bearings and shaft, Overdrive gearbox greatly reduce the efficiency of the installation. Since the generator is on land, it requires a Foundation that leads to capital expenditures and the increase in the volume of construction works. The Foundation requires the installation of a bottom frame, which is gidrokoleso. Synchronous generator has a cylindrical shape performance, which leads to an increase of the dimensions of the unit.

The closest to the technical nature of the claimed invention is a submersible hydroelectric power plant for generating electrical energy, comprising a turbine with a vertical axis of rotation, connected to an electric generator, the shapers of the water flow, the protective device from floating objects, while the end of the impeller shaft is connected to the shaft, thrust bearing impeller turbines rigidly mounted in the cover (see EN 21719110 C1 10.08.2001, F03B 13/00). Hydroelectric power requires coastal and benthic structures, hydraulic engineering works are time-consuming and costly.

The objective of the invention is to provide a submersible monoblock micro is hydroelectrically vertical, characterized by the reduced dimensions and weight, the cheaper the cost of the generated electrical energy due to the lack of investment in the construction of the station, to simplify the design and technology of installation works, as well as reduced operating costs.

The problem is solved in that in a submersible monoblock microhydroelectric to produce electrical energy, comprising a turbine with a vertical axis of rotation, connected to an electric generator, the shapers of the water flow, the protective device from floating objects, according to the invention, the lower end of the impeller shaft through a spline connection is directly connected to the shaft, the thrust bearing impeller turbines rigidly mounted in the top cover of the electric generator so that it is simultaneously guiding bearing for the electric generator, and the electric generator has a mechanical form of execution, made water-filled and placed under the turbine, and the turbine housing and the body electric generator to form a single structural unit.

The invention is illustrated by drawings, where Fig. 1 shows a projection device, a side view with the section, Fig. 2 is a top view with cut. Submersible monoblock who microhydroelectric is suspended from on moored boats and submerged monoblock, containing the turbine and electric generator. The turbine includes a housing 1, an impeller with blades 2, a vertical shaft 3 of the impeller, the guide and thrust bearings. The turbine housing has a flow-through channel 4, input 5 and output 6 open intended for devices forming the water flow in the working channel of the turbine, confuser 7 and the diffuser 8. The upper end of the shaft 3 turbines placed in the guiding slide bearing 9, which is based on the cross-piece 10 with the cover 11. Cross posted at the top of the turbine housing and rigidly connected with it. There are eyebolts 12 for transportation and installation of the device. The lower end of the shaft 3 turbines are structurally designed as a thrust bearing-heel 13 , which rests on a thrust bearing 14 of the thrust bearing, which is also the guiding bearing for an electric generator. The thrust bearing 14 is rigidly fixed on the top cover 15 of the housing of the electric generator. Thrust bearing provided along the longitudinal axis of the shaft grooves, which includes the splined shaft 17 of the electric generator, thereby creating a direct, rigid connection of the shaft 3 of the turbine with the shaft 17 of the electric generator. The generator housing is located under the turbine housing rigidly connected with it and the will is formed in a single compact design of the power plant. The electric generator includes a housing 15, the rotor 16 with permanent magnets, the shaft 17, the magnetic circuit of the stator winding, the guide bearing and thrust bearing 18. The upper end of the shaft 17 of the electric generator has slots that are fixed in the grooves of the cylindrical thrust bearing at the lower end of the shaft 3 of the turbine. The generator has a mechanical form of execution, which allows to reduce the height of the plant and use it on rivers and shallow depth. In addition, the mechanical performance form allows you to obtain low speed generator, eliminating the need to use a multiplier. The electric generator is water-filled, which makes it a good cooling in water. Lubrication of the bearings of the electric generator and turbine is water. If necessary, the conditions of constant frequency and voltage of the electrical generator, submersible monoblock micro hydropower plant is supplied by the Autonomous controller.

Submersible monoblock micro hydropower plant works as follows. The flow of water passing through the confuser 7, increases its speed through the input window 5 of the flow channel is supplied to the impeller blades of the turbine.

If sufficient pressure, the flow of water overcomes the mechanical resistance and acinet to rotate the impeller shaft and the associated shaft of the electric generator. When the rotation of the generator permanent magnets of the rotor creates a rotating magnetic field, which, crossing the conductors of the stator winding, creates a EMF. Under the action of EMF through the load current flows, it is displayed ashore by means of electric cable. From the working channel water through the diffuser enters the river. To prevent the turbine foreign objects, confused before the channel is established, the protective device.

Techno-economic benefit of the proposal is the following. Submersible monoblock micro hydropower plant has reduced dimensions and weight, due to the design it has minimal height that allows its use on shallow rivers; it does not require the construction of dams on river, coastal and benthic structures. Industrial use of plants in small and medium rivers can reduce the cost of its production and operation, and provide cheap electricity. The device is designed to simplify and reduce the cost of its installation and removal, as it can be delivered to the installation site assembled. Design submersible monoblock microhydroelectric allows, if necessary, to build a cluster of such installations.

Submersible monoblock micro hydropower plant nailu the PWM suited for use as a mobile installation.

Submersible micro hydropower plant for generating electrical energy, comprising a turbine with a vertical axis of rotation, connected to an electric generator, the shapers of the water flow, the protective device from floating objects, characterized in that the lower end of the impeller shaft through a spline connection is directly connected to the shaft, the thrust bearing impeller turbines rigidly mounted in the top cover of the electric generator so that it is simultaneously guiding bearing for the electric generator, and the electric generator has a mechanical form of execution, made water-filled and placed under the turbine, and the turbine housing and the housing of the electric generator to form a single structural monoblock.



 

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