Cooling turbine outlet dewatering device

Abstract

The invention relates to the technical field of aviation environment control, in particular to a cooling turbine outlet dewatering device. Comprising a front shell, a rear shell, a front electric heating piece, a front electric heating piece cable, a rear electric heating piece, a rear electric heating piece cable, a heat conduction metal sponge, a drainage pipe and an air guide pipe. The device is tightly attached to an outlet of a cooling turbine, moisture in a medium is cooled and separated out to form supercooled liquid drops by fully utilizing high-speed vortex airflow and lower temperature of the outlet of the cooling turbine, a liquid film is formed under the centrifugal action of the vortex airflow and is tightly attached to the wall surface of a pipeline, and the liquid film advances under the blowing of the airflow and is in a liquid state within a short distance; through the heating of the heating sheet and the heat conduction of the heat conduction metal sponge, the supercooled liquid drops are prevented from being condensed into ice; and meanwhile, the air guide pipe balances internal and external pressure, so that supercooled liquid drops continuously enter and are enriched and are discharged out of the product through the drainage pipe under gravity and internal and external pressure difference of the product, and the aim of separating water from an outlet of a cooling turbine by the product is fulfilled.

Description

Technical Field

[0001] The invention relates to the technical field of aviation environment control, and in particular to a cooling turbine outlet water removal device. Background Art

[0002] The cooling turbine is the core refrigeration component in the air circulation refrigeration system of the aviation environmental control system, and determines the upper limit of the refrigeration capacity of the refrigeration system. The airflow temperature at the outlet of the cooling turbine is relatively low, usually below zero degrees. The water vapor carried by the airflow at the outlet of the cooling turbine will be precipitated and condensed into supercooled droplets, which will adhere to the pipe wall or the windward surface of the downstream product, accumulate to form an ice layer, and block the pipe or the windward surface.

[0003] According to the current environmental control system treatment method, an anti-icing branch is generally added at the turbine outlet, hot air is introduced to mix with the turbine outlet and then heated to raise the temperature above zero degrees, so that the ice layer melts into water droplets. This method only melts the ice layer into water droplets and blows them downstream, but does not remove the moisture at the cooling turbine outlet from the main refrigeration circuit. A dewatering device is still required downstream to remove free water; and the introduction of deicing hot air will increase the cooling turbine outlet temperature, waste the cooling turbine's refrigeration capacity, and greatly reduce the overall refrigeration capacity of the environmental control. Summary of the invention

[0004] Purpose of the Invention

[0005] A cooling turbine outlet water removal device is proposed, which can remove water from the cooling turbine outlet to avoid freezing of pipelines and downstream products without reducing the refrigeration capacity of the cooling turbine.

[0006] Technical Solution

[0007] A cooling turbine outlet water removal device comprises a front shell, a rear shell, a front electric heating plate, a front electric heating plate cable, a rear electric heating plate, a rear electric heating plate cable, a heat-conducting metal sponge, a drain pipe, and an air duct; the front electric heating plate is attached to the inner wall of the front shell, the front electric heating plate cable is connected to the front electric heating plate and led out from the front shell, the rear electric heating plate is attached to the inner wall of the rear shell, the rear electric heating plate cable is connected to the rear electric heating plate and led out from the front shell, the air duct is arranged in the heat-conducting metal sponge, the heat-conducting metal sponge sleeve is housed in the rear shell, the rear shell and the front shell are welded as a whole to form an internal structure, the internal structure comprises a water accumulation bag and a ventilation cavity; a water diversion trough is provided on the internal structure, the bottom of the water diversion trough contacts the heat-conducting metal sponge, and the air inlet of the air duct is located at the front end of the water diversion trough, and the air outlet of the air duct is connected to the ventilation cavity; a drain pipe is welded on the front shell.

[0008] Furthermore, the front housing is connected to the cooling turbine outlet, and the water is separated by utilizing the centrifugal action caused by the vortex airflow at the cooling turbine outlet.

[0009] Furthermore, the passage before the medium enters the water diversion trough should be as short as possible.

[0010] Furthermore, the front shell and the rear shell are made of metal material.

[0011] Furthermore, the water diversion tank is an annular structure. The supercooled liquid droplets and liquid film formed with the vortex airflow at the outlet of the cooling turbine are distributed in a circumferential direction. The annular shape of the water diversion tank is convenient for being in the same shape as the liquid film to remove most of the water.

[0012] Furthermore, the width of the water dividing groove is 3.5 mm. Due to the dual effects of water molecule tension and air flow velocity, the thickness of the liquid film is about 3 mm.

[0013] Furthermore, the water diversion tank is arranged at 45°-60° toward the air inlet direction. The water diversion tank is arranged at 45°-60° toward the air inlet direction to fully utilize the centrifugal effect of the liquid film and reduce the airflow entering the water diversion tank.

[0014] Furthermore, the air outlet of the air duct is arranged at a 45° angle away from the air inlet direction. The air outlet of the air duct is arranged at a 45° angle away from the air inlet direction to prevent airflow and water droplets from directly entering the air duct, and to form a negative pressure area at the outlet of the air duct to make it easier for gas to be discharged.

[0015] Furthermore, the air inlet of the air duct is arranged at the front end of the water diversion tank, which can prevent liquid from entering the air duct, ensure that the air duct can conduct air discharge, balance the internal pressure of the water removal device, and prevent the internal pressure from being too high and water from entering.

[0016] The beneficial effects of this application are:

[0017] The above invention is installed close to the outlet of the cooling turbine, making full use of the high-speed vortex airflow and low temperature at the outlet of the cooling turbine, so that the water in the medium is cooled and precipitated to form supercooled droplets. Under the centrifugal action of the vortex airflow, a liquid film is formed to cling to the wall of the pipeline, and it moves forward under the blowing of the airflow. It is liquid within a short distance and enters the water separation tank of the above invention. The supercooled droplets are prevented from condensing into ice through heating by the heating plate and heat conduction by the heat-conducting metal sponge; at the same time, the air guide tube balances the internal and external pressures, so that the supercooled droplets continue to enter and enrich, and are discharged from the product through the drain pipe under gravity and the pressure difference between the inside and outside of the product, so as to achieve the purpose of separating the product from the water at the outlet of the cooling turbine. Compared with the current method of adding an anti-icing branch at the outlet of the turbine, the water is removed while avoiding the freezing of the pipeline wall and the downstream windward surface; at the same time, no heated hot air is introduced, which will not reduce the cooling effect of the turbine; the structure is simple and reliable, and the heating power of the heating plate can be adjusted according to the different turbine cooling powers, and it has high adaptability. This device can be expanded to be used in gas-liquid two-phase separation scenarios in low temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The present invention is a schematic diagram of a cooling turbine outlet water removal device according to an embodiment of the present invention.

[0019] Figure 2 A half-section view of a water removal device at a cooling turbine outlet;

[0020] Figure 3 Exploded view of the water removal device at the cooling turbine outlet.

[0021] Among them, the front shell 100, the rear shell 200, the front electric heating plate 300, the front electric heating plate cable 301, the rear electric heating plate 400, the rear electric heating plate cable 401, the thermal conductive metal sponge 500, the drain pipe 600, and the air guide pipe 700. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0023] Figure 1 The present invention is a schematic diagram of a cooling turbine outlet water removal device according to an embodiment of the present invention.

[0024] refer to Figure 1 , front shell 100, rear shell 200, front electric heating plate 300, front electric heating plate cable 301, rear electric heating plate 400, rear electric heating plate cable 401, thermal conductive metal sponge 500, drain pipe 600, and air guide pipe 700.

[0025] The front electric heating plate cable 301 and the rear electric heating plate cable 401 are power supply cables connecting the front electric heating plate 300 and the rear electric heating plate 400. The front shell 100 and the rear shell 200 are welded together by a weld 4. The front electric heating plate 300 is bonded to the front shell 100, and the rear electric heating plate 400 is bonded to the rear shell 200. The thermal conductive metal sponge 500 is installed in the cavity formed by the front shell 100 and the rear shell 200. The drain pipe 600 is butt-welded through the circular hole at the bottom of the front shell 100, and the air guide pipe 700 is welded through the circular hole in the middle of the rear shell 200.

[0026] The front shell 100 is provided with a connecting flange, which is connected to the upstream turbine cooler. The length of the pipeline indicated at 1 should be less than 5 mm. The water precipitated from the turbine cooler outlet forms a liquid film under the centrifugal effect of the vortex airflow. The liquid film is a supercooled droplet that has not frozen. It moves along with the airflow close to the inner pipe wall. Under the continuous centrifugal effect of the vortex airflow, it is selected to flow into the water collection bag cavity formed by the front shell 100 and the rear shell 200 close to the water distribution groove 2. The front electric heating plate 300 and the rear electric heating plate 400 are connected to the front electric heating plate cable 301 and the rear electric heating plate cable 401. 1 generates heat when powered, and heats the closely attached shell 100, rear shell 200, water dividing tank 2, and heat-conducting metal sponge 500 to prevent the water in the water collecting bag cavity formed by the water dividing tank 2, the shell 100, and the rear shell 200 from freezing. At the same time, part of the air entering through the water dividing tank 2 is discharged into the internal pipe 3 through the air guide pipe 700 under the action of the pressure in the water collecting bag cavity, to prevent the liquid film from entering the water dividing tank 2 due to excessive pressure in the water collecting bag cavity. The continuously entering water accumulates in the water collecting bag cavity, and is discharged into the outside atmosphere through the drain pipe 600 under the action of gravity and the internal and external pressure difference.

[0027] Core invention point: Taking full advantage of the extremely low temperature at the outlet of the cooling turbine, the water precipitated at low temperature will form a liquid film under the centrifugal effect of the vortex airflow at the outlet of the cooling turbine, and flow into the water collection bag of the water removal device close to the water distribution tank. The electric heating plate and heat-conducting metal sponge in the water distribution tank and the water collection bag are heated to prevent the water droplets from freezing, and the water droplets are discharged through the drain pipe under the pressure difference between the turbine outlet and the outside atmosphere. After the water is discharged, the pipeline and downstream products will not freeze, and the refrigeration capacity of the cooling turbine will not be reduced.

[0028] Secondary invention point 1: It has been verified through experiments that the size of the water distribution groove is set to 3mm, which allows the liquid film to enter the water collection bag smoothly, and no excess gas enters the water collection bag.

[0029] Secondary invention point 2: The electric heating plate in the water collection bag is electrically heated, and heat is conducted through the heat-conducting metal sponge to prevent the water in the water collection bag from freezing.

[0030] Secondary invention point 3: An air guide tube is provided inside the water collection bag to balance the pressure difference between the water collection bag and the intermediate pipeline, so as to prevent the pressure inside the water collection bag from being too high and water from being unable to enter smoothly.

[0031] Secondary invention point 4: The electric heating plate and heat-conducting metal sponge in the water collection bag can be replaced with a flat tube fin radiator. Hot air is passed into the flat tube fin radiator, which can also prevent the water in the water collection bag from freezing.

[0032] Example

[0033] The cooling turbine outlet water removal device comprises a front housing 100, a rear housing 200, a front electric heating plate 300, a front electric heating plate cable 301, a rear electric heating plate 400, a rear electric heating plate cable 401, a heat-conducting metal sponge 500, a drain pipe 600, and an air guide pipe 700; the front electric heating plate 300 is attached to the inner wall of the front housing 100, the front electric heating plate cable 301 is connected to the front electric heating plate 300 and is led out from the front housing 100, the rear electric heating plate 400 is attached to the inner wall of the rear housing 200, and the rear electric heating plate cable 401 is connected to the rear electric heating plate The heat plate 400 is led out from the front shell 100, the air duct 700 is arranged in the thermally conductive metal sponge 500, and the thermally conductive metal sponge 500 is housed in the rear shell 200. The rear shell 200 and the front shell 100 are welded as a whole to form an internal structure, and the internal structure includes a water accumulation bag and a ventilation cavity; a water diversion trough is provided on the internal structure, the bottom of the water diversion trough 2 contacts the thermally conductive metal sponge 500, and the air inlet of the air duct 700 is located at the front end of the water diversion trough 2, and the air outlet of the air duct 700 is connected to the ventilation cavity; a drain pipe 600 is welded on the front shell 100.

[0034] In a certain embodiment of the present invention, the front housing 100 is connected to the cooling turbine outlet, and the centrifugal effect caused by the vortex airflow at the cooling turbine outlet can be fully utilized to separate water.

[0035] In one embodiment of the present invention, the passage before the medium enters the water separation tank 2 should be as short as possible. The supercooled droplets remain in liquid state for a short time and may be converted into solid state in a short time, so they need to enter and exit the water removal device as soon as possible for heating and separation.

[0036] In one embodiment of the present invention, the front housing 100 and the rear housing 200 are made of metal material. Metal material has good low temperature resistance, its strength will not be greatly reduced at low temperature, and it will not become brittle under low temperature alternating temperature load.

[0037] In one embodiment of the present invention, the water diversion tank 2 is an annular structure. The supercooled liquid droplets and liquid film formed by the vortex airflow at the outlet of the cooling turbine are distributed in a circumferential direction. The annular shape of the water diversion tank is convenient for the same shape as the liquid film to remove most of the water.

[0038] In one embodiment of the present invention, the width of the water diversion groove 2 is 3.5 mm. Due to the dual effects of water molecule tension and air flow velocity, the liquid film thickness is generally about 3 mm. The width of the water diversion groove 2 is set to 3.5 mm to facilitate sufficient removal of water when less gas enters.

[0039] In one embodiment of the present invention, the water diversion tank 2 is arranged at 45°-60° toward the air inlet direction. The water diversion tank 2 is arranged at 45°-60° toward the air inlet direction to fully utilize the centrifugal effect of the liquid film and reduce the airflow entering the water diversion tank.

[0040] In one embodiment of the present invention, the air outlet of the air duct 700 is arranged at a 45° angle away from the air inlet direction. The air outlet of the air duct 700 is arranged at a 45° angle away from the air inlet direction. On the one hand, it can prevent airflow and water droplets from directly entering the air duct, and on the other hand, a negative pressure area can be formed at the outlet of the air duct to make it easier for gas to be discharged.

[0041] In a certain implementation case of the present invention, the air inlet of the air duct 700 is arranged at the front end of the water diversion tank 2. The air inlet of the air duct 700 is arranged at the front end of the water diversion tank 2 to prevent liquid from entering the air duct, ensure that the air duct can conduct air discharge, balance the internal pressure of the water removal device, and prevent the internal pressure from being too high and moisture from entering.

[0042] It is understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and unless defined as here, will not be interpreted with idealized or overly formal meanings. The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment of equivalent changes for application in other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., made according to the technical essence of the present invention, should be included in the protection scope of the present invention.

Claims

1. A cooling turbine outlet water removal device, characterized in that: It includes a front shell, a rear shell, a front electric heating plate, a front electric heating plate cable, a rear electric heating plate, a rear electric heating plate cable, a heat-conducting metal sponge, a drain pipe, and an air duct; the front electric heating plate is attached to the inner wall of the front shell, the front electric heating plate cable is connected to the front electric heating plate and led out from the front shell, the rear electric heating plate is attached to the inner wall of the rear shell, the rear electric heating plate cable is connected to the rear electric heating plate and led out from the front shell, the air duct is arranged in the heat-conducting metal sponge, the heat-conducting metal sponge sleeve is housed in the rear shell, the rear shell and the front shell are welded as a whole to form an internal structure, the internal structure includes a water accumulation bag and a ventilation cavity; a water diversion trough is provided on the internal structure, the bottom of the water diversion trough contacts the heat-conducting metal sponge, and the air inlet of the air duct is located at the front end of the water diversion trough, and the air outlet of the air duct is connected to the ventilation cavity; a drain pipe is welded on the front shell.

2. The device according to claim 1, characterized in that The front housing is connected to the cooling turbine outlet, and the water is separated by utilizing the centrifugal effect caused by the vortex airflow at the cooling turbine outlet.

3. The device according to claim 2, characterized in that The passage before the medium enters the water diversion trough should be as short as possible.

4. The device according to claim 3, characterized in that The front shell and the rear shell are made of metal materials.

5. The device according to claim 4, characterized in that The water diversion trough is of an annular structure; the supercooled liquid droplets and liquid film formed with the vortex airflow at the cooling turbine outlet are distributed in a circumferential direction, and the annular shape of the water diversion trough is convenient for being in the same shape as the liquid film to remove most of the water.

6. The device according to claim 5, characterized in that The width of the water dividing groove is 3.5 mm.

7. The device according to claim 6, characterized in that The water dividing groove is arranged at 45°-60° toward the air inlet direction; the water dividing groove is arranged at 45°-60° toward the air inlet direction to fully utilize the centrifugal effect of the liquid film and reduce the airflow entering the water dividing groove.

8. The device according to claim 7, characterized in that The air outlet of the air duct is arranged at an angle of 45° away from the air inlet direction; the air outlet of the air duct is arranged at an angle of 45° away from the air inlet direction, which can prevent airflow and water droplets from directly entering the air duct on the one hand, and on the other hand, a negative pressure area can be formed at the outlet of the air duct to make the gas easier to discharge.

9. The device according to claim 8, characterized in that The air inlet of the air duct is arranged at the front end of the water diversion trough; the air inlet of the air duct is arranged at the front end of the water diversion trough to prevent liquid from entering the air duct, ensure that the air duct can conduct air discharge, balance the internal pressure of the dehydration device, and prevent the internal pressure from being too high and moisture from entering.

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