Hydroelectric plant

FIELD: power engineering.

SUBSTANCE: plant is designed for generating electric energy and pumping of water. Proposed device contains floating base in form of catamaran with channel between housing of catamaran in which water wheel with blades on its outer surface is mounted, and electric generator mechanically coupled with shaft of water wheel. Diameter of water wheel is less than its length. End faces of water wheel are covered, and front profile of water wheel blades is made to logarithmic spiral. Moreover, plant is furnished with water pump, and drive of electric generator is made in form of step-up harmonic gearing whose flexible gear is coupled with end face of water pump. Output shaft of step-up gearing is aligned with shafts of water wheel and electric generator, being coupled with water pump by step-up belt drive. Drive sheave of step-up belt drive is installed on shaft of electric generator. Controllable clutches are installed on shafts of belt drive.

EFFECT: improved reliability and enlarged operating capabilities of plant.

2 cl, 3 dwg

 

The invention relates to hydropower and for installations that use the flow of water to produce electricity and pump water, for example in irrigation systems.

It is known device for the generation of electricity using the kinetic energy of water containing hull boats with water conveyance channel impeller with curved blades mounted on the shafts, kinematically connected to the generator (see EN 2049924 C1 IPC6F 03 7/00,17/00, 1995).

The technical disadvantage of the known devices for generating electricity from water currents: the complexity of the design and, as a consequence, the lack of high reliability; the presence of a large number of generators that dictates the need for complex synchronization generated by the electric current.

Also known hydroelectric installation comprising a floating base, made in the form of a catamaran, between which is formed a channel is placed in the last conveyor with rollers and an endless belt with fixed on her blades, and a generator, kinematically connected with the shaft of the conveyor (SU 1474317 A1, IPC4F 03 7/00, 1989).

The technical disadvantage of this setup: lack of reliability due to the presence of operating in waters of the conveyor belt; irrational mode RA is the notes of the generator, operating at low speed due to the lack of Overdrive transmission; limited functionality due to the lack of funds for pumping water, which affects the water supply irrigation systems.

Closest to the claimed device is a hydroelectric installation, as described in the application France No. 1175566, IPC F 03 B 7/00, 27.03.1959.

Known hydroelectric plant comprises a floating base, made in the form of a catamaran, between which is formed a channel is placed in the last water wheel attached to the outer surface of the blades and generator, kinematically connected with the shaft of the water wheel, the diameter of the water-wheel is less than its length.

However, this setting does not provide the reliability and optimization of operation mode of the generator.

The task of the invention is to improve reliability and expand the functionality of the installation, optimization of the mode of operation of the generator.

This technical result is achieved due to the fact that hydroelectric power plant comprises a floating base, made in the form of a catamaran, between which is formed a channel is placed in the last water wheel attached to the outer surface of the blades and electro is enerator, kinematically associated with the shaft of the water wheel, the diameter of the water-wheel is less than its length. The ends of the water-wheel are closed, the front profile of the blades of a water wheel made on a logarithmic spiral. The plant is equipped with water pump, the drive of the electric generator is made in the form placed inside wheel increases toothed wave transmission - multiplier, flexible wheel which is connected with the end of the water-wheel, the output shaft multiplier combined with the shaft of the water wheel and generator, which by increasing belt is connected with the water pump drive pulley belt transmission is mounted on the shaft of the generator, shafts, belt installed operated clutch. The ratio of diameter to length of the water-wheel is 1:1,3...1:2,0.

The invention is illustrated graphic material.

1 shows a General view of the hydroelectric installation, type in the plan; figure 2 is a view As in figure 1; figure 3 is a kinematic diagram of the installation.

Hydroelectric plant comprises a floating base in the form of a catamaran 1, between 2 buildings which formed the working channel 3. In the last posted waterwheel 4, whose diameter D is less than the length L. On the outer surface of the wheel 4 fixed blades 5, the front profile which is made according to the log epicheskoi spiral. Inside the wheel 4 is the multiplier 6, the output shaft 7 which are aligned with the wheel shaft 4 and is kinematically connected to a generator 8 and is further provided with a water pump 9. At the entrance to the working channel 3 is provided by the grid 10, between buildings 2 installed bridges 11, covering the water wheel 4.

The multiplier 6 is made in the form of increasing toothed wave transmission, external gear 12 with the internal toothing provided with a flange 13, is rigidly connected with the output shaft 7, which is placed beyond the end 14 of the water-wheel 4. A continuation of the flexible gear wheel 15 (outer teeth) is a flexible cylindrical shell 16, is bonded with the opposite end 17 of the water-wheel. The wave generator (carrier) 18 multiplier attached to the fixed shaft 19, which is placed beyond the end face 17 and are fixed against rotation. The wave generator 18 provided with rollers, their number is usually two.

Between the shafts 19 and 7 of the multiplier and the respective ends 17 and 14 of the water-wheel 4 is provided by seals, resulting in the inner cavity of the water-wheel 4 (with a multiplier of 6) sealed.

On the shaft 7 (the side of the water wheel 4) has a drive pulley 20 belt drive 21, which is the kinematic connection between the shaft 7, the generator 8 and a water pump 9. Belt p the transfer is made increases, drive pulley 20 which has a larger diameter; the shaft of the pulley by means of the driven clutch 22 is connected to the generator. Driven pulley 23 (smaller diameter) of the belt 21 through its driven clutch 24 is connected with the pump 9 with 25 suction and discharge nozzles 26. Estimated speed: the water wheel 4 nto=100 min-1; generator 8 ng=1500 min-1; water pump 9 nn=3000 min-1. In this regard, indicative of the gear ratio step-up transmission: multiplier 6 im=nto/ng≈0,067; belt 21 ip=ng/nn=0,5; as is known, the multiplier increases toothed wave transmission can provide and smaller values of the gear ratio. The ratio of the diameter to the length of the water-wheel 4 D:L=1:1,3...1:2,0 (confirmed experimentally in a laboratory setup). The unit can be equipped with anchors 27.

The hydroelectric plant works as follows. The plant is used as a rule on small rivers, including water intakes for irrigation systems. Installation of tow on the identified location by using, for example, anchors 27. Water rushes into the working channel 3 between the housings 2 floating Foundation - catamaran 1. Due to the narrowing of the flow channel 3, the flow velocity of the water increases, then the flow of water acts on the blades 5 of the water-wheel 4 and causes it to rotate in the bearings of the base 1. By performing the frontal profile of the blades 5 on a logarithmic spiral reduces hydraulic losses in the energy conversion process, the flow of water into mechanical energy by rotating the water wheel 4.

Wheel 4 rotates, drags his butt 17) a flexible cylindrical shell 16 and the associated flexible toothed wheel 15 (outer teeth). Due to the fact that flexible wheel (with its inner side with their rollers affects the wave generator 18 from both sides, the flexible teeth of the wheel 15 in two places engages with the internal teeth of the outer gear-wheel 12. On the flexible toothed wheel 15 number of teeth z1less than the number of teeth z2external gears 12 (z1<Z2; Z2-Z1=k), with k equal to or a multiple of the number of waves clips of the generator 18. As a consequence, the external gear 12 engages with the accelerated rotation with a gear ratio multiplier 6 tom=K/z2.

The output shaft 7 of the multiplier 6 causes the rotation of the drive pulley 20, which by means of increasing belt 21 causes the rotation of the driven pulley 23. Depending on operating conditions possible, at least three modes of operation of hydroelectric installation:

1) the generator 8 is activated, the water pump 9 is not used (this is m mode driven clutch 22 is enabled, the clutch 24 is turned off, the driven pulley 23 rotates idle);

2) used water pump 9, the generator 8 is not used (driven clutch 24 is enabled, the clutch 22 is turned off, increasing transfer belt 21 is under load);

3) involved and work together generator 8 and the pump 9 (both managed couplings 22 and 24 are included, belt 21 is under load). The joint work of the generator 8 and the pump 9 is possible with intensive water flow in the river or with limited electricity needs. If the water pump 9 water taken from the river through a suction pipe 25 and is served in the water, such as irrigation, highway through the discharge pipe 26.

Thus, these modes of operation are achieved with a simple kinematic scheme, resulting in increased reliability of the system and the generator and pump are utilized at the optimum speed. Along with this is expanding the functionality of the installation and use of sustainable energy in the water.

1. Hydroelectric installation comprising a floating base, made in the form of a catamaran, between which is formed a channel is placed in the last water wheel attached to the outer surface of the blades and generator, kinematically is connected with the shaft of the water wheel, the diameter of the water wheel is smaller than its length, characterized in that the ends of the water-wheel are closed, the front profile of the blades of a water wheel made on a logarithmic spiral, the installation is equipped with a water pump, the drive of the electric generator is made in the form placed inside the water-wheel Overdrive gear of the wave transmission - multiplier, flexible wheel which is connected with the end of the water-wheel, the output shaft multiplier combined with the shaft of the water wheel and generator, which by increasing belt is connected with the water pump drive pulley belt transmission is mounted on the shaft of the generator, shafts, belt installed operated clutch.

2. Installation according to claim 1, characterized in that the ratio of the diameter to the length of the water-wheel is 1:1,3...1:2,0.



 

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