SU1539392A1 - Heat-driven pump - Google Patents

Abstract

The invention can be used in heat driven pumps for pumping fluid due to the thermal energy of the temperature difference between it and the environment. The purpose of the invention is to increase efficiency, simplify and improve the reliability of the pump sealing. The containers (Е) 6, 7 of constant and variable volume with heat-conducting walls and bottom are partially filled with heat-sensitive working fluid and are hydraulically connected to each other by a rocker arm (K) and a gas guide (H) 9. C 8 and G 9 are mounted on a hinge in the working chamber 1 with rigid walls. A stop 24 is installed at the bottom of the chamber 1. At E 7 to K 8 and G 9, a valve 11 with a float 15 is installed with the possibility of shutting off the hydraulic connection with E 6 at the position of the float 15 in the E 7 filled with liquid working medium located at the stop 24. G 9 is located outside of K 8. The hinge 10 is made in the form of elastic tubes connected to K 8 and G 9. E 6 is fixed relative to chamber 1. On the float 15 there is a magnet 16, which interacts through an E 6 side wall 20 that is made magnetic-permeable. , with a magnet 19. Magnet 19 is rigidly mounted in chamber 1 at position E 6 on an emphasis 24. Execution of E 7 motionless with K 8 and G 9 connected to it by means of elastic tubes provides the increased tightness. 2 hp f-ly, 5 ill.

Description

one

(21) 4394619 / 30-29

(22) 02.02.88

(46) 01.30.90. Bul B ° 4

(71) Central Research Institute for the Integrated Use of Water Resources

(72) E.P. Kovalenko

(53) 621.65 (088.8)

(56) USSR Author's Certificate No. 1439276, cl. F 04 B 17/00,

F 04 B 43/00, 1987.

(54) PUMP WITH HEAT DRIVE

(57) The invention can be used in heat-driven pumps for pumping fluid due to the thermal energy of the temperature difference between it and the environment. The purpose of the invention is to increase efficiency, simplify and improve the reliability of the pump sealing. Capacities (Е) 6,7 of constant and variable volume with heat-conducting walls and bottom are partially filled with heat-sensitive worker.

body and hydraulically connected to each other by the yoke (K) and gazovodom (G) 9. K 8 and G 9 are mounted on a hinge in the working chamber 1 with rigid walls. The stop 24 is installed at the bottom of the chamber 1. BE7naK8 and G9 are fitted with a valve 11 with a float 15 with the possibility of shutting off the hydraulic connection with E 6 at the position of the float 15 with E 7 filled with a liquid working medium located on the stop 24. G 9 is located outside of K 8. 10 is made in the form of elastic tubes connected with SC8 and G9. The EB is stationary relative to the camera 1. On the float 15 there is a magnet 16, which interacts through the side wall part 20 E 6, made magnetically permeable, with the magnet 19. The magnet 19 is rigidly mounted in chamber 1 at position E 6 on the stop 24. Execution E 7 stationary with K 8 and G 9, connected to it with elastic tubes, provides increased tightness. 2 hp f-ly, 5 ill.

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The invention relates to mechanical engineering, namely, pump engineering, and can be used to transfer fluid due to the thermal energy of the temperature difference between it and the environment.

The purpose of the invention is to increase the efficiency of the device, simplifying and improving the reliability of the pump sealing

Figure 1 shows the diagram of the pump in the lower position of the capacity of the variable volume; figure 2 - scheme of the pump tipH upper position of the tank

t

volume; FIG. 3 shows a variable volume capacitance unit with a float valve in the lower position filled with the working fluid; figure 4 - green tank of variable volume with oplavkovym valve in the upper poloenii; figure 5 - section on fig.Z. The pump contains a rigid working chamber 1 with heat-insulated walls with pressure and suction pipes 2 and 3, respectively, with pressure and suction valves 4 and 5. In the chamber 1 there is a capacity 6 of variable volume. Capacity

6 hydraulically connected to the tank

7 constant volume, which is made stationary relative to the chamber 1, the rocker 8 and gazovodom 9, connected with their rigid parts in the tank 7 using elastic tubes Hinges 10, providing the possibility of rotation of the rocker arm 8 and gazovod 0 relative to the fixed tank 7. On in the gas duct and at the entrance of the rocker arm 8, a valve 11 is located, for example a coaxial one, having pivotal segments 12 connected to an axis 13 to which the lever 14 is connected, to the second end a float 15 is mounted on which the magnet 16 is located. Float

15 has a weight 17. A magnet 19 is mounted on a rack 18 rigidly connected to the chamber 1, which, through the side wall portion 20 of the capacitor 6 made magnetically permeable, in the lower position of the capacitor 6 contacts the magnet 16. The capacitance 6 is made with a hard visor 21 located above the float 15, which eliminates the restriction of rotation of the float by the elastic wall of the tank 6. The bottom of the tank 7 is located above the level of the liquid working fluid in the tank 6 at its lowest position in chamber 1, and the maximum level of the working fluid in it is lower

0

five

0

five

0

five

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five

The lowest mark of the bottom of the tank 6 at its higher position in the chamber 1. On the rocker arm 8 is a regenerative heat exchanger 22. The casing of the valve 11 has a slot 23 located at the entrance to the rocker and providing a lower level of discharge of each working fluid from the tank 6 into the tank 7. V the camera 1 has a stop 24, limiting the rotation of the container 6 in it.

The pump works as follows.

When the container 6 is in the chamber 1 in a lower position on the stop 24 (Figures 1 and 3), the liquid working fluid, for example an aqueous solution of ammonia, is discharged along the rocker arm 8 from the container 7 of constant volume. At the same time, the gas pressure in the tank x 7 and b is balanced through the gas outlet 9. As far as

when the liquid working fluid enters the tank 6, its level increases, the float 15 pops up and turns the lever 14 around the axis 13 and through it the segments 12. As the level of the liquid working fluid in the tank 6 increases, the float 15 approaches the side wall part 20 of the chamber 1, the segments 12 begin to gradually overlap the inlet cross section of the rocker arm 8 and the gas duct 9. At a given approximation of the magnet 16 located on the float 15, the interaction with the magnet 19 fixedly mounted on the rack 18 does not reach the force at which the magnet 19 attracts the magnet 16. When this occurs, the lever 14 and, accordingly, the segments 12, which overlap the yoke 8 and the gas duct 9, quickly hydraulically isolate the container 6 from the container 7 of constant volume. The working fluid in the tank 6 is heated. When, for example, an aqueous solution of ammonia is heated, gaseous ammonia is released from it and as the temperature increases, the pressure of ammonia in the tank 6 increases. As the ammonia releases from the aqueous solution and the gas pressure in the tank 6 increases, the pressure of the elastic wall of the tank 6 increases on the practically incompressible fluid in chamber 1. As a result of this pressure, the liquid from chamber 1 is squeezed through valve 4 into the discharge pipe 2. With increasing the volume of the container 6 increases the force of ejection of the liquid in the chamber 1 to the container 6. When this force reaches the value at which

gp w4r r4gg

+ P g x. ъ

+ RMG4

where g is the acceleration of the force of gravity;

p is the density of the fluid in chamber 1;

w. - capacity 6;

P is the weight of the tank 6 with the yoke 8 and the gas outlet 9;

R - the weight of the working fluid in the tank

6;

PW is the vertical component of the attraction force of the magnet 16 by the magnet 19;

G {G2

g, g - respectively, the components

shoulder moment gpw.,

H p and v

When the inequality (1) is fulfilled, capacity 6 emerges. When the container b reaches a high position in the chamber 1, the float 15, tend to take a vertical position in the liquid working fluid in the container 6, rotates the lever 14 and the segments 12, which, when turned, unlocks the hydraulic connection between the containers 6 and 7 (see figures 2 and 4). As a result, the liquid working fluid is drained from the tank 6 into the tank 7, which is below the tank 6, through the rocker arm 8 and the gas pressure in the tank 6 and 7 is balanced through the gas outlet 9. As the fluid working fluid is drained from the tank 6, its level decreases in tank 6 , and the float 14 rotates towards the bottom of the tank 6 under the action of the load, which keeps the valve 11 open. In vessel 7, the liquid working fluid is cooled, its ability to absorb gas increases, the gas absorbs, as the temperature of the liquid working fluid decreases, the gas pressure in vessel 6 decreases, and the pressure of the elastic wall of vessel 6 to the incompressible fluid filling chamber 1 decreases. When the pressure of the elastic wall of the tank 6 is reduced to the value at which the suction valve 5 of the pipeline 3 opens, liquid is sucked into the chamber 1. As the volume of the container 6 decreases, the value of the ejection force acting on the container 6 decreases. When the value of w decreases so much that

7pw ,, g. P g

1 4 L v r 4- Lg.

(2)

d

is

20

25 30, 5 0 50 g

the capacitance 6 is lowered to the stop 24 of the chamber 1 and the process is repeated.

Thus, by isolating the container 6 from the tank 7 by heating the working fluid in the tank 6 at its lower position in the working chamber 1, heat transfer from the tank 6 to the tank 7 by gas (water vapor and ammonia) is eliminated, the volume of gas required for filling is reduced tank 7 with increasing pressure in tank 6. As a result, the efficiency of the pump increases.

The implementation of the tank 7 fixed with respect to the chamber 1, as well as with the yoke 8 and the gas duct 9 connected to the tank 7 with elastic tubing-hinges 10, provides an increased tightness of the pump, which allows pumping fluids without leaks from the pump that are undesirable or unacceptable wastewater containing hydrogen sulfide.

Claims (3)

Invention Formula 1. Heat-driven pump containing constant and variable volume tanks with heat-conducting walls and bottom, partially filled with a heat-sensitive working fluid and hydraulically connected to each other by a rocker arm and gas duct mounted on a hinge in a working chamber with rigid walls, and an emphasis mounted on its bottom, suction and injection valves and piping, characterized in that, in order to increase efficiency, in a variable volume tank A valve with a float is installed on the rocker arm and gas duct with the possibility of shutting off the hydraulic connection with the constant volume tank when the float is positioned in the variable volume tank on the stop with the gas duct located outside the rocker arm. 2. Pump according to claim 1, characterized in that, in order to simplify and increase sealing reliability, the hinge is made in the form of elastic tubes connected to a rocker arm and a gas outlet, and the constant volume capacity is fixed relative to the working chamber. 3. A pump according to claim 1, characterized in that a valve is installed on the float of the valve magnet, mutually connected, made magnetically permeable, with the second magnet rigidly mounted in the working chamber, at the position 9. --- and. y - acting through part of the side wall-,. this capacity on the support of the working chamber 141 5 M 15 1B 21 / / ki, made magnetopermeable, with a second magnet rigidly mounted in the working chamber, at the position - and. y - 15 ten /ten 11 72 13 1 18 Fi. J ff tf V, 21 6 9 20 14