Device to convert water energy into mechanical power of rotation

FIELD: power engineering.

SUBSTANCE: invention relates to hydraulic power engineering and can be used for conversion of kinetic power of waste water. Proposed device comprises water-wheel 1 composed by rigidly jointed sidewalls 3, blades 4 and hub, water feed system 8 and water discharge system and water retaining element 9 secured at the housing. Said curved housing extends from water-wheel wall bottom point to top point on water-wheel working part and features width equal to that of water-wheel 1. Device comprises second water-wheel 1 in design identical to that of first water-wheel 1 and equipped with the same water retaining element 9. Both said wheels are articulated via gearing and mounted at housing 7. The latter is composed by two plates interconnected by elements 9 in symmetry with water feed system vertical axis at the distance of water-wheel 1 radius. Rectangular plate-shape blades 4 are fitted at the hub and walls 3. Pockets are composed between hub inner surfaces, blades 4 and walls 3 to be completely filled with water on the side of working parts of two water-wheels 1 to retain water at rotation to bottom point.

EFFECT: higher specific power and efficiency, perfected design.

2 dwg

 

The invention relates to hydropower and can be used to convert the kinetic energy of the discharged water in natural and man-made systems into mechanical energy of rotational motion.

The known device to convert the energy of flowing water into useful work of various types, for example a rotary vane hydraulic machine (EN 99076 U1, publ. 10.11.2010 year).

A rotary vane hydraulic machine includes a guiding apparatus, the turbine chamber, an impeller consisting of a body installed on the blades and Rethimno mounted on a shaft which is mounted in the bearing, and a suction pipe. The turbine chamber is in the form of a helical hollow cylinder, one end of which is connected to the guide vanes, and the other end is connected with the suction pipe, the blades of the impeller is placed directly in the cavity of the screw cylinder and the guide device is placed upstream of the turbine chamber. In addition, the nominal inner diameter equal to the diameter of the turbine impeller.

Known axial turbine (EN 94288 U1, publ. 20.05.2010).

Axial turbine includes a guide device is made of a coaxially arranged outer and inner shells, between which the fixed blades, the impeller is placed in the chamber, with the blades is curved, fixed to the body mounted on the shaft, can be rotated from -20° to +20° from the calculated position of the setting angle of the blades of the impeller, power and drainage part. The camera of the impeller are connected by one end with the discharge part, and the other with the external shell of the guide vane is attached to the power part of the curved shape. The body of the impeller is connected with the inner casing of guide vanes mounted on the shaft. The shaft is positioned horizontally relative to the plane of rotation of the impeller posted via bearing on supports. Each of the guide vanes is made in the form of two movably connected parts, the first of which is rigidly fixed between the guide vane and the second part is fixed between them can be rotated relative to the first part. The impeller is equipped with three such blades are evenly mounted on the chassis by means of fixing elements.

In them the main functional elements are water wheels with blades that are installed inside the housing complex forms, time-consuming to manufacture, installation and operation. The blades of the water wheel made and installed with the possibility of changing the position and profile in the process of exploitation mechanisms through which and drive.

Closest to the proposed invention to the technical essence and the achieved result is a device for converting energy of water into electrical energy (patent RU(11)No. 2306453 C2, CL F03B 7/00, 2006, publ. 20.09.2007).

A device for converting energy of water into electrical energy includes water wheel of the rigidly connected to the drum, the side walls, blades and hub firmly attached by spokes to drum, United mechanical transmission via a gearbox to a generator, bearing, bearings, power and drainage systems. In addition, it is provided with a retaining element mounted on the bottom on the vertical axis point of the side walls from the side of the working part of the water-wheel at a distance of 5-10 mm and is made radially bent with an angle of coverage equal to 150-165°, and a width equal to the width of the water-wheel, with each of the blades of the water wheel is made in the form of plates of two parts, the angle between which is equal to 120-140°, and the ratio of the length of one side of the plate to the length of the other part fixed to the drum, is equal to 1/1,5-1/2,0 angle to the tangent at the point of contact with the plate and the drum equal 25-45°, the number of blades is selected taking into account the fact that the distance between the outer perimeter of the side walls is equal to 0.25-0.35 m Water wheel through stupice bearing assemblies mounted on an axis, mounted on poles.

The disadvantages of the described devices are low power density and low efficiency of water use, due to the fact that the filling of the compartments of the water-wheel is not more than 60-70% of the volume, with part of the water discharged from the compartments during the rotation due to the presence of the gap between the surfaces of the wheel and the retention element, difficult to manufacture the design of the blades of the wheel and the need to use them in large quantities to increase the fill rate of the compartments of the water wheel.

Solved technical problem of the present invention is to increase the specific power of the device and the efficiency of water use, simplifying the design.

Solve the technical problem in the device for converting energy of water into mechanical energy of rotational motion containing water wheel of rigidly connected side walls, blades and hub, power and drainage systems, water-retaining element attached to the housing, is installed from the bottom to the top points of the side walls of the water-wheel from the side of the working part is made radially curved and of a width equal to the width of the water-wheel and water wheel through the hub and bearing assemblies mounted on the housing, is achieved in that the device comprises a second water to the forest, identical in construction with the first water wheel and is also equipped with the same water-retaining element, both water wheels are connected to each other kinematically by means of gears and mounted on the housing made in the form of two plates connected water-holding elements, symmetrically relative to the vertical axis of power systems on the distance of the radius of the water-wheel, the blades of each of the water-wheel is made in the form of plates of rectangular shape and is fixed to the hub and the side walls of the wheels so that between the inner surfaces of the hub, blades, side walls formed pockets, fully filled with water from the side of the working parts of the two water wheels hold water during the rotation to the lowest point.

The invention is illustrated by drawings, where figure 1 shows schematically the device for converting energy of water into mechanical energy of the rotational motion, the longitudinal section a-a, figure 2 - top view.

The device (figure 1, figure 2) contains two water wheels 1, exactly the same design of the rigidly connected to the hub 2, two side walls 3 in the form of a disk, flat blades 4 and kinematically connected gear 5 for their simultaneous rotation. The device also includes bearing assemblies 6 to the 7 STS, made in the form of two plates connected water-holding elements, power 8 and drainage (not shown) of the system. The device is equipped with a water-retaining elements 9, which are made radially curved and mounted rigidly on the part of the working parts of water wheels on the housing 7 without a clearance. The blades 4 of each of the water-wheel 1 is designed as a flat rectangular plate with length equal to the width of the wheel and rigidly connected with the hub 2, and ends with side walls 3. The number of blades is chosen with regard to the size of the water-wheel.

A device for converting energy of water into mechanical energy of the rotational motion is as follows. Water from the reservoir (not shown) for power system 8 is fed from above into the chamber water wheels 1 through the conduit of rectangular cross-section. The feedwater flow is controlled by the guiding apparatus is equipped with a drive (not shown). Next, the flow of water, keeping its original vertical movement interacts with the blades 4 water wheels 1, gives them the potential and kinetic energy, which is converted into mechanical energy in the form of rotational torque on the shaft. The movement of the entire mass flow of water in one, only in a vertical direction result is to improve the hydrodynamic characteristics of the flow, for example, to reduce energy loss, improve the uniformity and speed of flow. This allows you to increase bandwidth and power density of the device, greatly improve operational capabilities, for example, it can be used in a wide range of pressure stream of water. Increasing efficiency of water coming from the power system, the proposed device is achieved by establishing in the case of one of the second water wheel, exactly the same design, having a kinematic connection with the first water wheel and use the retention elements of elastic material, is rigidly fixed in the housing without a clearance and is pressed against the surface of the side drive water wheels. Increasing the power density of the device is ensured due to the torque increase due to full fill all compartments (pockets) of the working parts of the two water wheels and water retention in them without loss in rotation to the lowest point.

The volume of retained water depends on the geometric dimensions of water wheels and can be calculated by the formula: V=πR2H, where R is the radius of the lateral disks, H - the width of the water-wheel.

An additional technical effect of simplifying the structure of the device for converting energy of water into rotational energy e is to achieve is achieved by reducing the number of blades, designed as a simple plate of rectangular shape, convenient for attachment to the hub and lateral walls. Volume limited two adjacent blades, the hub and side walls in the form of an obelisk, forms a compartment (pocket) of the wheel for receiving and retaining water from the power system. Flat blades provide smooth filling water compartments (pockets) water wheels, and in the lower position contribute water to spill out of the compartments at the lowest point during the rotation.

The problem is solved by the fact that in the hydraulic portion of the device consisting of a housing with installed two water wheels, new is symmetric placement of water wheels relative to the axis of the conduit, which ensures uniform filling of the compartments water wheels and improves the hydraulic characteristics of the stream. This improves the throughput of two to three times the power density of the device. In addition, the device simultaneously performs the function of camera, water wheels, which contributes to simplification of the structure and size of the main host device, where the energy conversion of water into the energy of rotational motion.

The device is simple to manufacture, can be made of sheet metal or of wood. The design is there is no useless space filled with water, without producing useful work.

A device for converting energy of water into mechanical energy of rotational motion containing water wheel of rigidly connected side walls, blades and hub, power and drainage systems, water-retaining element attached to the housing that is installed from the bottom to the top points of the side walls of the water-wheel from the side of the working part is made radially curved and of a width equal to the width of the water-wheel and water wheel through the hub and bearing assemblies mounted on the housing, characterized in that the device comprises a second water wheel, identical in construction with the first water wheel and is also equipped with the same water-retaining element, both water wheel connected to each other kinematically by means of gears and mounted on the housing made in the form of two plates connected water-holding elements, symmetrically relative to the vertical axis of power systems on the distance of the radius of the water-wheel, the blades of each of the water-wheel is made in the form of plates of rectangular shape and is fixed to the hub and the side walls of the wheels so that between the inner surfaces of the hub, blades, side walls formed pockets, t is updated to be filled with water from the side of the working parts of the two water wheels with water retention during rotation to the lowest point.



 

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2 cl, 2 dwg

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