(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 inlet for supplying a heated fluid and a discharge pipe for exhaust heated liquid. Inside the housing is a rotor in the form of a double-flow centrifugal wheel with the holes on the periphery. Concentric with the rotor is a stator with holes. The holes in the rotor is made in the form kropiewnicki nasdaw Venturi, and the holes in the stator is in the form of suddenly expanding nasdaw. The invention is aimed at creating a more simple device, as well as the intensification of the process of heating the liquid by increasing the frequency of hydraulic hammers and sustainable hydrodynamic cavitation not only in the holes in the stator and rotor. 1 C.p. f-crystals, 6 ill. The invention relates to constructions of pumps-generators, which can be used mainly in the Autonomous closed systems aplasia and heating liquids in technological systems.The closest technological solution is ultrasonic activator (patent RU N 2054604 C1 from 20.02.96 g) containing two or more series-connected working chamber, each of which has a pump impeller of a centrifugal pump mounted 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 body parts, parts of the stator;
the difficulty of mutual alignment of mating parts;
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 the liquid by increasing the frequency of hydraulic impacts and ensuring conditions for sustainable is attained, however, in a rotary hydraulic shock pump-a heat generator, comprising a housing with a nozzle inlet and a nozzle for discharge of liquid, inside the housing concentric with each other are the rotor shaft and the stator. In the peripheral part of the rotor in the annular nozzle holes are made in the form of an outer cylindrical nasdaw Venturi. In the stator holes are made extending to the side of the casing and having the form of a suddenly expanding nasdaw.In Fig. 1 shows a longitudinal section of a pump-boiler, consisting of the following main parts:
1 - hollow body;
2 - ring stator with holes;
3 - rotor, made in the form of a two-line centrifugal wheel;
4 - shaft of the rotor;
5 - ring rotor with holes;
6 - suction piping pump casing-boiler.In Fig. 2 shows a cross-section of the pump-boiler, which additionally shows:
7 - tube for removal of the heated liquid;
8 - suction cavity of the rotor;
9 - pressure regulator.In Fig. 3 shows the conditions for the occurrence of hydrodynamic cavitation in the holes in the rings of the rotor 5 and the ring of the stator 2 (zone a and zone B) when combining hole condensation of cavitation bubbles in the holes of the ring stator 2 under the action of excess pressure P2supported by the pressure regulator 9.In Fig. 5 shows the position of the rings of the rotor and stator at the time of alignment holes
In Fig. 6 shows the position of the rotor and stator when the misalignment of the holes.Cylindrical holes of the rotor leads to the formation of hydrodynamic cavitation in zone A (Fig. 3) (similarly grupotelmaritimo nozzle Venturi), if the length of the holes and their diameter are within (3,5...4)dLn(6...7)d, where d is the hole diameter, Ln- length of the hole.The rotor 3 is equipped with blades, as a centrifugal pump, designed for messages centrifugal force of the heated liquid and provide pressure P1before the cylindrical holes.Socket 7 for exhaust heated liquid is equipped with a pressure regulator 9, which provides a constant pressure P2in the pressure cavity pump heat source.Works as described pump-heat follows.During rotation of the rotor shaft 4 of the heated fluid through inlet pipe 6 of the hollow body 1 (Fig. 1) flows into the suction chamber 8 and divided into two flow is directed into the rotor 3 made in the form of dogpatch knocking her to the peripheral part to the annular nozzle 5 and letting the fluid flow kinetic energy.In the annular nozzle 5 of the rotor, the fluid passes through many of cylindrical holes. Having a large kinetic energy, the fluid flow passing through the cylindrical holes, forming them in whirlpool zone a (Fig. 3) with reduced pressure. Not only whirlpool area, but also the transit stream within this area is characterized by the presence of vacuum
where (HHAC)max - maximum vacuum in the zone A;
P1- pressure in the impeller before the opening of the rotor;
P2- pressure in the pressure cavity 7.When the pressure in the zone And below the pressure of water vapor boils water rapidly, forming cavitation bubbles, and saturates their transit stream within this zone. After passing zones And transit jet pressure increases and cavitation bubbles merge, forming the first wave cavitation shock, heating the liquid.At the time align the holes of the rotor and stator fluid passing through the suddenly widening the holes, forming a zone of reduced pressure in the zones (Fig. 3).In the extended part of the holes of the stator 2 there is a local head loss or pressure loss h is improving pressure along the entire length of the cylindrical holes of the rotor (direct hydraulic shock), which is getting stronger by the collapse of cavitation bubbles in zone a (Fig. 4).In the zone of intensive "the collapse of the cavitation bubbles helps a constant excess pressure P2.Cavitation bubbles at the time of condensation of water vapor, at the moment of collapse is called the local hydraulic shock, accompanied by a high overpressures up to 1500...2000 kg/cm2and temperature 1000...1500oC.Energy liquids purchased in the hydraulic shock passes partly into heat and is determined by the formula
VP = VCmt,
where V is the volume of fluid flowing through the nozzles, cm3;
P - loss (differential) pressure in the nozzle, kg/cm2;
volumetric weight of the fluid, kg/cm3;
C - specific heat of liquid calories(ggrad);
m - mechanical equivalent of heat, kgs m3/kcal;
t = t-t0- increase the temperature of the liquid;
t and t0- search and the initial temperature of the liquid,oC.In accordance with the above formula
< / BR>Water = 0.001 kg/cm3;
C = 1 kcal/kgrad;
m = 42700 kgs m/kcal.Varying the flow rate of the flowing fluid and changing pressure P1is the same rotor, cause self-oscillation mode in the hydraulic system.Since the establishment of the self-oscillation mode the heating rate of the fluid increases and the power consumption of the actuator is reduced.The fluid heated in the allocation of energy is expelled to the exhaust pipe 7 (Fig. 2) and, overcoming the resistance of the pressure regulator 9, is sent to the system, the heat.The specified pump-generator can be used for heating and hot water supply of residential and industrial premises, as well as for heating of liquids in industrial processes.The use of the proposed pump-boiler allows to provide hot water and heat to objects that were deleted from the main pipelines, and the environment is not contaminated by combustion products of fossil fuels in the areas of thermal power generation.References
1. T. M. Basta. "Engineering hydraulics", M. engineering, 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 Sewerage", Leningrad, stroiizdat, 19, 42...150, 398 405....4. P. P. Chugaev. "Hydraulics", M. Energy, Leningrad branch, 1971 , page 14...17, 28...33, 64...74, 85...88, 135...140, 163...167, 277... 286, 307...314, 426...436. 1. Rotary pump-generator having a hollow body with a suction inlet for supplying a heated fluid and a discharge pipe for exhaust heated liquid 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 kropiewnicki nasdaw Venturi, and the holes in the stator is in the form of suddenly expanding nasdaw.2. Rotary pump-heat generator according to p. 1, characterized in that the length Lpcylindrical holes in the rotor and its diameter d is according to (3.5...4)d Lp(6...7)d.
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.