(57) Abstract:The invention relates to constructions of pumps-generators, which can be used in Autonomous closed heating systems and heating the liquid in technological systems without combustion of fossil fuels. Rotary pump-heat source comprises a hollow body with a suction nozzle for supplying a heated fluid and a discharge pipe for exhaust heated liquid. Inside the rotor in the form of a centrifugal wheel with the holes on the periphery and the stator holes. The stator is installed coaxially to the rotor. The centrifugal impeller is made of a twin. Holes of the rotor in the form of conoidal Asadchev, tapering in the direction of the stator. Hole of the stator is made in the form of suddenly expanding nasdaw with the transition to the conical diverging nozzle with an angle extension =90°. This form of holes stator eliminates the Coanda effect (adhesion) of the boundary layer of fluid adjacent to the wall and to increase the area of hydrodynamic cavitation. The invention is aimed at creating a more simple device, as well as the intensification of heating the liquid by increasing the force of the hydraulic shock and hydrody the s can be preferably used in the Autonomous closed heating systems residential, public and industrial buildings, as well as for heating liquids in technological systems.The closest technological solution is ultrasonic activator (patent RU N 2054604 C1 from 20.02.1996) containing two or more series-connected working chamber, each of which has a pump impeller of a centrifugal pump, is bonded on the periphery of the rotors in the form of perforated rings. Coaxial rotors in buildings working chambers opposite each rotor is fixed to the stator in the form of a perforated ring. Working chamber communicated with each other by means of diffusers. The last working chamber is connected with the first chamber circulation loop.The disadvantages of the known devices are:
large axial load on the bearings;
low-tech Assembly, as required elementwise one-time Assembly of the rotor, the housing parts, the stator;
the difficulty of ensuring mutual alignment spraguei details;
the complexity of providing a high density of the device when the fluctuations of pressure and temperature.The objective of the invention to create a more simple device, as well as intensification of heating fluid through the W, in a rotary hydraulic shock pump-a heat generator, comprising a housing with connections for supply and discharge of fluid inside the housing concentric with each other are the rotor and stator. In the peripheral part of the rotor with holes in the form canoodling Asadchev, extending part, which are located toward the center of the rotor. In the stator holes are made extending to the side of the casing and having the form of a suddenly expanding nozzle to move in a conical divergent nozzles with corner extension =90o.This form of holes stator eliminates the Coanda effect - adhesion boundary layer of fluid adjacent to the wall and is more conducive to the emergence of hydrodynamic cavitation than, for example, holes of the stator in the form of a conical diverging nozzle.A rotor equipped with blades, as a centrifugal pump, designed for messages centrifugal force of the heated liquid.In Fig. 1 shows a longitudinal section of a pump-boiler, consisting of the following main parts:
1 - hollow body (stator);
2 - ring stator with holes;
3 - rotor, made in the form of a two-line centrifugal to the of progenerator;
In Fig. 2 shows a cross-section of the pump-generator:
7 - tube for removal of the heated liquid;
8 - suction cavity of the rotor.In Fig. 3 shows the position of the rings of the rotor and stator combination of holes. In this position, in zones II hydrodynamic cavitation occurs.In Fig. 4 shows the position of the rings of the rotor and stator with different (overlapping) holes. At this point in zone I of the rotor arise hydraulic shock, and in zones II disappear cavitation bubbles under the action of hydrostatic pressure in the discharge cavity.Works as described pump-heat follows.The heated fluid through inlet pipe 6 of the hollow body 1 of Fig. 1 enters into the suction chamber 8 and divided into two flow is directed into the rotor 3 made in the form of a double-flow impeller of a centrifugal pump.The rotor 3 rotates, the effect of the vanes on the liquid, discarding it to the peripheral part and letting the fluid flow kinetic energy.The liquid passing through conoidal holes, splits into streams with maximum specific kinetic energy and maksymalne walls of the stator 2 of Fig. 4 there is a sharp pressure increase (zone I in Fig. 4) to direct hydraulic shock. As the number of holes in the rotor and the stator are equal, the radial direction of the hydraulic shock trickles evenly distributed around the circumference of the stator. At the time align the holes of the rotor and the stator there is a sharp decrease pressure and part of the energy of the fluid is transferred into heat energy, which can be defined by the formula:
V P = V C m t ,
where V is the volume of fluid flowing through the nozzles in cm3;
P - loss (differential) pressure in the nozzle in kg/cm2;
volumetric weight of the liquid in kg/cm3;
C - specific heat of liquid in kcal/(ggrad);
m - mechanical equivalent of heat in kgs m3/kcal;
t = t-t0- increase the temperature of the liquid;
t and t0- search and initial fluid temperature inoC.In accordance with the above formula
< / BR>Water = 0.001 kg/cm3;
C = 1 kcal/kg deg;
m = 42700 kgs m/kcal.At the time align the holes of the rotor 5 and the stator 6 liquid, highly kinetic energy, goes in a divergent openings of the stator, where there is a sharp pressure rise and the fall velocity W - Fig. 3 - there is separation of the jet of liquid from the walls. In zone II of Fig. 3 there is a sharp decrease in pressure below the pressure of water vapor, the liquid boils, hydrodynamic cavitation occurs. At the time of the next overlapping holes of the rotor walls of the stator in the holes in the stator, in zones II, the pressure increases, and the cavitation bubbles collapse", causing local hydraulic microdry, accompanied by a high overpressures up to 1500-2000 kg/cm2and temperature of 1000-1500oC.Fluctuations in the hydraulic system caused by pressure surges and hydrodynamic cavitation, Malagasy contribute to the development of self-oscillation mode. Since the establishment of the self-oscillation mode the heating rate of the fluid increases dramatically.The fluid heated in the allocation of energy is expelled to the exhaust pipe 7 of Fig. 2 and is sent to the system, the heat.The specified pump-generator can be used for heating and hot water cottages, agricultural, civil and industrial facilities, as well as for heating of liquids in industrial processes.The use of the proposed pump-boiler allows to ensure the Yes is not contaminated by products of combustion of fuel in the areas of thermal power generation.References
1. T. M. Basta. Engineering hydraulics. - M.: Mashinostroenie, 1971, page 44-49, 118, 349, 375, 379-381, 509-512.2. L. M. Barrows, N. F. Fedorov. Handbook of hydraulic calculations of water supply and sanitation. - Leningrad: stroiizdat, 1973, pages 56-67, 185-194.3. L. I. Bogomolov, K. A. Mikhailov. Hydraulics. - M.: stroiizdat, 1972, pages 87-92, 142-150, 398-405. Rotary pump-heat, containing a hollow body with a suction nozzle for supplying a heated fluid and a discharge pipe for exhaust heated liquid and located inside the rotor in the form of a centrifugal wheel with the holes on the periphery and a stator with holes, mounted coaxially to the rotor, characterized in that the centrifugal wheel is made of a two-line, the holes in the rotor is in the form of conoidal nozzles, tapering in the direction of the stator, and the last hole is in the form of suddenly expanding nasdaw with the transition to the conical diverging nozzle with an angle extension = 90o.
FIELD: low-power engineering, applicable as a component of windmills for production of heated water in houses not provided with centralized hot water supply.
SUBSTANCE: the friction heater has a tank with heated liquid, fixed and rotary disks coupled to the drive shaft for joint axial motion, and a propeller with the working force in the direction of the disks are installed in the tank. The novelty in the offered heater is the installation of additional fixed and rotary disks, the propeller is fastened on the drive shaft, and each of the rotary disks is installed between two fixed disks, and a float located above the propeller for rotation relative to the drive shaft and for axial motion on the latter.
EFFECT: enhanced efficiency of heater operation at the same rotary speed of the drive shaft.