RU2395006C1 - Heat tube screw pump - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: proposed pump comprises cylindrical housing wherein inner surfaces of top and bottom face walls are jointed by wick laid along housing central axis, the housing being covered by shell ring to make gaps nearby face walls. Evaporation chamber inner surfaces of sidewalls and top face wall are covered by screen made from thin layer of porous material jointed to wick at the center of top face cover. Power turbines are arranged coaxially one behind the other with their peripheral and inner edges of vane edges rigidly jointed to working chamber inner surface and outer surface of shell ring along normal to said turbines. Screw is arranged on working chamber outer surface. Evaporation chamber inner surfaces of sidewalls and top face wall are covered by screen made from thin layer of porous material jointed to wick at the center of top face cover. Casing that covers the screw is jointed to housing via ring seals and is furnished with intake and discharge branch pipes.

EFFECT: higher efficiency of pump.

2 dwg

Description

The invention relates to a power system and can be used for the disposal of secondary thermal energy and low-potential thermal energy of natural sources, namely, for the transformation of thermal energy into mechanical energy by moving and pumping liquids.

A device is known - a screw pump, comprising a housing with inlet (suction) and exhaust (discharge) channels (nozzles), a shaft located in the housing and screws installed on the shaft (SU 1631200 A1, 02.28.1991).

The main disadvantages of the known device are the inability to utilize low-potential secondary thermal energy resources, heat resources of natural sources, the bulkiness of the structure, which narrows the scope and reduces its effectiveness.

Closest to the invention is a heat pipe screw pump, including an evaporation and condensation chambers, equipped with a wick partially covered by a shell, the inner surface of the end walls of which are covered with a lattice made of porous material and in contact with hot and cold fluids, a working chamber inside which are arranged power turbines coaxial with each other, rigidly fixed by the peripheral edges of the blades to the inner surface of its wall along the normal to it, clip (RU 2320878 C1, 03/27/2008).

The known pump is part of a coaxial heat pipe engine, which contains a sequentially arranged evaporation chamber in contact with the hot medium, a working chamber, a condensation chamber in contact with the cold medium, interconnected by an annular seal, while the evaporation and condensation chambers are made in in the form of cylindrical caps, the inner side walls of which are covered with a wick connected to a grating made of a thin layer of porous material, covering the inner surface of the end walls, the working chamber is made in the form of a cylindrical tube with an annular bead, inside it are arranged power coaxial coaxial with one another, rigidly fixed by the peripheral edges of the blades to the inner surface of the wall of the working chamber normal to it, the condensation tube consists of a cage covering the screw surface the working chamber, forming a feed pump and a condensation zone.

The main disadvantages of the known device are the connection of the evaporation, working and condensation chambers through O-rings, which reduces its strength and tightness, using only end walls for heat transfer, which reduces its performance, the inability to use it directly for pumping and pumping liquids, which narrows the scope of its application and, ultimately, reduces its effectiveness.

The objective of the invention is to increase the efficiency of a heat pipe screw pump.

The technical result is achieved by the fact that in a heat pipe screw pump (TPSH), including an evaporation and condensation chambers, equipped with a wick partially covered with a shell, the inner surface of the end walls of which is covered with a lattice made of porous material and in contact with hot and cold media, the working a chamber inside which power turbines are arranged coaxially one after another, rigidly fixed by the peripheral edges of the blades to the inner surface of its wall along the normal to it, a clip, but according to the invention, the evaporation, working and condensation chambers are located in one cylindrical body, the inner surfaces of the upper and lower end walls of which are connected by a wick extending along the central axis of the body, covered by a shell with the formation of gaps at the upper and lower end walls, the inner surface in the evaporation and condensation chambers the side walls are covered with a lattice made of a thin layer of porous material connected to the lattices of the upper and lower end walls, in turn, is connected In the center with the wick, the power turbines in the working chamber are rigidly fixed by the inner edges of the blades to the outer surface of the shell of the wick normal to it, and on the outer surface of the working chamber there is a screw covered by a cage connected to the housing through ring seals and equipped with suction and discharge nozzles .

The invention is illustrated by drawings, where

figure 1 presents the heat pipe screw pump (TSTN),

figure 2 is a section aa in figure 1.

TPShN contains a cylindrical housing 1, in which the inner surfaces of the upper and lower end walls 2 and 3 are connected by a wick 4, passing along the central axis of the housing 1 and covered by a shell 5 with the formation of gaps 6, 7 at the upper and lower end walls 2 and 3. In the direction steam movements are located: an evaporation chamber 8, the inner surface of the side walls and the upper end wall 2 of which is covered with a grill 9 made of a thin layer of porous material, connected in the center of the upper end wall 2 with the wick 4, the working chamber 10, inside the cat Power turbines 11, 12 are arranged coaxially one after another, rigidly fixed by the peripheral and inner edges of the blades to the inner surface of the wall of the working chamber 10 and the outer surface of the shell 5 along the normal to them, by the screw 13 on its outer surface, the condensation chamber 14, the inner surface of the side the walls and the lower end wall 3 of which is covered with a lattice 15 made of a thin layer of porous material and connected in the center of the lower end wall 3 with a wick 4. A holder 16 covering the screw 13 of the working chamber 10 is connected Nena the housing 1 through the annular seal 17 and is provided with suction and discharge nozzles 18, 19.

TPSH works as follows.

Before starting work, air is removed from the chambers 8, 10, 14 of the TTSHN and the wick 4 and the porous material of the grids 9, 15 are filled with a working fluid, which is selected depending on the temperature potential of cold and hot media (nozzle for removing air and supplying a working fluid in FIG. 1-2 are not shown). After that, the TPShN is installed so that the evaporation chamber 8 is in contact with the hot medium, and the condensation chamber 14 is in contact with the cold, and the clip 16 is rigidly fixed.

As a result of heating the evaporation chamber 8 (the heat exchange surface of which is increased compared to the known device due to the use of the upper end surface 2 of the upper part of the surface of the cylindrical wall of the housing 1 during the heat exchange process), intensive evaporation of the working fluid from its inner surface occurs. The porous material of the grating 9 prevents the formation of a vapor film on the inner surface of the chamber 8 and, thus, intensifies the evaporation process (Heat pipes and heat exchangers: from science to practice. Collection of scientific papers, Moscow, 1990, p.22). Steam is formed which, as a result of the rotation of the housing 1, is freed from the entrained droplets of the working fluid absorbed by the porous material of the grating 9 on the side wall of the chamber 8, which again transports them to the evaporation zone as a result of centrifugal force. The cleaned steam enters the working chamber 10 on the blades of successive power turbines 11, 12, rotates the housing 1 and, accordingly, reports a rotational movement to the screw 13. As a result of the rotation of the housing 1, a movable fluid enters the cavity between the screw 13 and the holder 16 from the suction pipe 18 , in which the required pressure is created, and it is supplied through the discharge pipe 19 to the pressure pipe (not shown in Fig.1-2) and then to the consumer. In the working chamber 10 occurs isentropic heat loss of steam with a simultaneous decrease in its temperature and pressure (I.N.Sushkin. Heat engineering. Moscow, Metallurgy, 1973, p.331). After that, the spent crushed steam enters the condensation chamber 14, condenses there by contacting the outer surface of the chamber 14 with a cold medium. Then, the formed condensate of the working fluid is absorbed by the porous material of the lattice 15, which increases the speed of the condensate to the wick 4 and under the influence of capillary forces (V.V. Kharitonov et al. Secondary heat and energy resources and environmental protection. Minsk, Vyssh. Shkola, 1988, p. 106) through the wick 4 enters the evaporation chamber 8. In the chamber 8, the working fluid on the grate 9 is distributed on its inner surface, the above-described evaporation process takes place, after which the resulting vapor is freed from drops of working fluid and yes its cycle is repeated.

Thus, the proposed TPSN provides the ability to transport liquids and create pressure in them by utilizing secondary thermal energy resources of various potentials (energy from waste water, exhaust gases, etc.), heat from natural sources (energy from the sun, water, etc. ), which ensures its high efficiency.

Claims (1)

A heat pipe screw pump, including an evaporation and condensation chambers, equipped with a wick partially covered with a shell, the inner surface of the end walls of which is covered with a lattice made of porous material and in contact with hot and cold media, the working chamber, inside of which are arranged coaxially one after another the power turbines rigidly fixed by the peripheral edges of the blades to the inner surface of its wall along the normal to it, a ferrule, characterized in that the evaporative, working and condensation This chamber is located in one cylindrical casing, the inner surfaces of the upper and lower end walls of which are connected by a wick extending along the central axis of the casing, covered by a shell to form gaps at the upper and lower end walls, in the evaporation and condensation chambers, the inner surface of the side walls is covered with a grating made from a thin layer of porous material connected to the grids of the upper and lower end walls, in turn, connected in the center with a wick, power turbines in the working chamber The poles are rigidly fixed by the inner edges of the blades to the outer surface of the wick shell normal to it, and on the outer surface of the working chamber a screw is arranged, covered by a ferrule connected to the housing through ring seals and equipped with suction and discharge nozzles.

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