The method of operation of two-phase pump

 

(57) Abstract:

The invention relates to the field of heat, with the preferred area of use - heat power engineering. The method of operation of two-phase pump is carried out by increasing the weight of the water molecules on the surface of the rotating trap and move her into a state of vapor phase, and due to the increment of the pressure from the weight of the water molecules along the radius of the trap increases the pressure of the hot fluid, which is obtained from the steam supplied to the inner surface of the trap when the enthalpy and temperature of the vapor is less than the temperature and enthalpy of boiling hot liquid on the inner surface of the trap. 3 Il.

The invention relates to the field of heat, the primary area of application - heat-and-power.

Known methods of operation of centrifugal pumps for pumping and raising the pressure of liquids or gases. Kravchenko, I. "Hydraulic machines", Moscow, "Energoatomizdat", 1983, Fig. 2.12, Fig.8.3. These pumps consist of a pump housing, a rotor mounted on it impellers, which is rotationally driven from an external source. The design also includes a shut-off and regulation is mainly due to the increment of centrifugal forces in the medium being pumped along the radius of the impeller.

The drawback of operating pumps is unreliable work with two-phase media.

Of the known methods, the closest one is the way of the two-phase pump for U.S. patent N 3590786, CL F 22 B 5/00, 1971, at which the increase in the weight of the water molecules on the surface of the rotating trap and its transition into the state of vapor phase.

The method of operation of the steam generator two-phase pump is that raising the steam pressure after the turbine is due to the transition pair after condensation in the state of superheated liquid in cavity water seal rotating steam generator, operating as a two-phase pump, and boil it to the exit. The boiling of the liquid occurs either in the chamber V, or at the system output tubes /nozzles/.

The disadvantage of this method is that overheating of the liquid is accomplished by passing heat from an external source, the complexity of the design and consequently the greater intensity of the pump. The disadvantages should also include the impossibility to control the liquid level in the trap.

The problem to which the invention is directed, is the possibility of pumping two-phase Rabochaya liquid level in the bolt.

The problem is solved due to the fact that in the method of operation of a two-phase pump by increasing the weight of the water molecules on the surface of the rotating trap and move her into a state of vapor phase due to the increment of the pressure from the weight of the water molecules along the radius of the trap increases the pressure of the hot fluid, which is obtained from the steam supplied to the inner surface of the trap when the enthalpy and temperature of the vapor is less than the temperature and enthalpy of boiling hot liquid on the inner surface of the trap.

The invention is illustrated by drawings, where Fig. 1 shows the basic design of the pump of Fig. 2 - view A, Fig.3 - type B.

Two-phase pump consists of:

1. The pump body.

2. Impeller mounted on the drive shaft.

3. Bubbler cylinder.

4. The output nozzles.

5. The sealing system between the pump casing and the impeller drive shaft.

6. Cavity water seal at the impeller.

7. Adjustable ring liquid level in the trap.

To preserve the surface of the transition pair of heated fluid in the hydraulic cylinder on the outside of radio the ECE pump/, filled with fluid, called trap/ 6. To resolve the difference of level in the water seal between the shoulder blades /them/ can perform equalization of the slot 8.

For contrast and increase the surface transition is applied bubble-cylinder 3 /produces a bubble transition in the overheated liquid/, through which also you to control the level of the water seal, if its surface is connected via a channel /see View a/ C atmosphere for carrying out deaeration of the liquid and the compensation of the bubble volume.

Adjustment of the level of the water seal can be made by an adjusting ring 7, which sets the clearance /a/ between the output nozzles of the impeller 4 and the ring /see type B/ /adjusts the flow rate of the hot fluid/.

The basic requirements for KONSTRUKTORSKOE calculation.

1/ determination of the frequency of rotation of the pump rotor at a given radius of the inner surface of the trap of the terms of compensation of the forces of intermolecular gap centrifugal forces /weight gain molecular weight, and not vapor-compression/

2/ the Definition of the area of the inner surface of the trap, depending on the speed collapserow the P> 3/ Definition of the radius of location of output nozzles to determine the increment of the pressure of the hot fluid and avoid boiling of the liquid from an energy gain from compressing it in the trap.

The work of two-phase pump is as follows:

Steam is supplied into the pump casing and bubble cylinder. Through the bubbler nozzle cylinder it arrives in the surface layer of the trap. On the surface of the trap the steam enters the phase of the hot liquid. The radius of the trap, under the action of centrifugal force increases the pressure of the hot fluid. With the obtained pressure superheated liquid out of the trap through the output nozzle and enters the vapour phase.

The adjusting ring is adjustable clearance /a/ between the output nozzles and ring /adjustable level in the water seal and the fluid flow through the output nozzle/.

Start of two-phase pump can be made during the initial filling of the trap neprikrytoi liquid /to eliminate vapor compression - increment of energy in it/ and to include in the cycle after its displacement is hot.

To avoid boiling the water seal stop two-phase pump should also be performed, when the great mass of the liquid on the surface of the inertial system the temperature of its boiling point increases. The steam supplied to the internal surface of the trap with the temperature and enthalpy /enthalpy/ less than boiling hot liquid first enters the state of liquid phase, then the pressure of the liquid phase increases, which takes much less energy than compressing the vapor phase, and then the liquid phase at the output of the pump passes into the state of vapor phase.

The invention reduces the cost of increasing the pressure of the working fluid, to simplify the design of two-phase pump, to reduce its intensity, but also to provide the ability to control the liquid level in the trap.

The method of operation of two-phase pump by increasing the weight of the water molecules on the surface of the rotating trap and move her into a state of vapor phase, characterized in that due to the increment of the pressure from the weight of the water molecules along the radius of the trap increases the pressure of the hot fluid, which is obtained from the steam supplied to the inner surface of the trap when the enthalpy and temperature of the vapor is less than the temperature and enthalpy of boiling hot liquid on the inner surface of the trap.

 

Same patents:

The invention relates to energy, in particular to a steam power plant, which converts thermal energy into mechanical

FIELD: engines and pumps.

SUBSTANCE: external combustion engine includes sealed housing in the form of flattened cone, which is partially filled with heat carrier. Housing includes evaporator and condenser. The housing includes heat-insulating ring being the element of the housing and rigidly attached both to evaporative section, and to condensation section of the engine housing. Turbine impellers with moving blades enclosed with a rim are rigidly attached to heat-insulating ring. Turbine impellers are rigidly attached to engine shaft. Turbine wheels with guide vanes enclosed with the rim representing an internal annular magnet are installed on the shaft. Rims of all wheels are installed so that an annular gap with housing is formed. Wheels with guide vanes are installed with possibility of being rotated in relation to the shaft - on bearings. External annular magnet rigidly attached to the housing is installed above internal annular magnet. Propeller is rigidly fixed on the engine shaft. The condenser includes bars, on which there rigidly fixed are cone-shaped plates of wave-like profile both on internal, and external sides of the housing. Combustion chamber with injectors is located around evaporator.

EFFECT: reducing mass and dimensions characteristics of the engine; enlarging its functional capabilities.

3 cl, 6 dwg

FIELD: engines and pumps.

SUBSTANCE: this engine comprises sealed o shaped to truncated cone partially filled with heat carrier. Said housing accommodates evaporator and condenser, heat insulating ring rigidly secured with both evaporator and condenser sections. Turbine blades working wheels are rigidly secured to heat insulating ring. Turbine working wheels are rigidly secured to engine shaft. Turbine wheels with guide vanes are fitted on the shaft, rim composed of a circular magnet covering said guides vanes. Rims of all wheels are arranged to make a circular clearance with said housing. Wheels with guide vanes are fitted to spin relative to the shaft in bearings. Outer circular magnet rigidly coupled with the housing is arranged above inner circular magnet. Screw is rigidly fitted on engine shaft. Hollow bars are arranged in said condenser. Spiral-shape combustion chamber is arranged around evaporator and includes the nozzle. Radiators are secured to said bars from both inner and outer sides of the housing and composed of trapezoidal plates with bushes arranged radially, said bushes covering the bars with clearance filled with heat conducting paste.

EFFECT: decreased weight and overall dimensions.

6 dwg

FIELD: machine building.

SUBSTANCE: invention relates to power engineering and can be used as an aircraft engine. Internal combustion engine includes tight housing (1) in form of truncated cone partially filled with heat carrier. Housing includes evaporator (2) and capacitor (3). In housing there is a heat-insulation ring (4), which is an element of housing and rigidly fastened with both evaporator and condenser of engine. To heat-insulation ring is rigidly attached impeller (5) of turbine with working blades, encircled by rim (6). Turbine wheel is rigidly secured to hollow shaft (7) of engine. Nozzle is installed on hollow shaft gear (8) of turbine, encircled by a rim (9), which is made up of internal annular magnet. Rims of both wheels are mounted so that annular gap (10) is formed with housing. Wheel with nozzle blades is installed with possibility of rotation relative to hollow shaft - on bearings (11). Above inner annular magnet there is outer annular magnet (12) rigidly connected to housing (13) of aircraft. On hollow motor shaft is rigidly fixed screw (14). In engine housing, in condensation zone, there are heat-conducting rods (15) on which are rigidly fixed plates (16), profile formed by technological operation "rolling" on both sides. Spiral is located around evaporator combustion chamber (17) with nozzles (18). Inside evaporator there is a metallic finely porous sponge (19).

EFFECT: higher engine power, safety of its transportation in idle state, as well as reduced weight and size.

3 cl, 8 dwg

Up!