Drain structure of a turbine and air circulating machine having the same

Abstract

The application provides a water drainage structure of a turbine and an air circulating machine with the water drainage structure. The water drainage structure of the turbine comprises a turbine, a shell and a flow guide, the turbine has an outlet; the shell is connected with the turbine, and the outlet extends into the shell; the flow guide is located in the shell and connected with the turbine, and the bottom of the shell is provided with a water drainage pipe; under the action of airflow, water in the outlet can first flow into the flow guide and then be drained from the water drainage pipe. The flow guide is arranged to guide the water generated at the outlet, so that the water is prevented from being stored in the shell for a long time, the problem of collecting and draining liquid water at the outlet of the turbine is effectively solved, and the comfort and safety of the use of the aircraft air conditioner are improved.

Description

Technical Field

[0001] This invention belongs to the field of air circulator technology, specifically relating to a turbine drainage structure and an air circulator having the drainage structure. Background Technology

[0002] In an air circulator, the air entering the turbine after high-pressure dehydration still contains some water vapor. During the expansion and cooling process, the temperature drops below zero, even below -40°C, and some of the water vapor condenses into ice particles. Due to the rotation of the airflow at the turbine exit, these ice particles accumulate on the turbine exit wall due to inertial impaction, eventually blocking the turbine exit. To prevent ice particles from clogging the turbine exit, an annular anti-icing ring cavity is designed at the turbine exit. A stream of hot air is introduced into the annular anti-icing ring cavity from the compressor exit, heating the turbine exit wall. The heat-exchanged gas then flows into the turbine inlet through a vent near the turbine inlet wall. While the anti-icing ring cavity prevents ice formation at the turbine exit, liquid water remains. This liquid water can travel along the piping and enter the aircraft cabin with the airflow, posing a hazard to the aircraft. Summary of the Invention

[0003] This invention provides a turbine drainage structure and an air circulator having the drainage structure, which can solve the technical problem that the turbine outlet cannot freeze, but there will be liquid water present, which may cause damage to the aircraft.

[0004] This invention provides a drainage structure for a turbine, the turbine having an outlet, the drainage structure comprising:

[0005] The casing is connected to the turbine, and the outlet extends into the casing;

[0006] The deflector is located inside the housing and connected to the turbine. A drain pipe is provided at the bottom of the housing. Under the action of airflow, water in the outlet can first flow into the deflector and then be discharged from the drain pipe.

[0007] In some embodiments, the flow guide has an inlet and an outlet, the inlet being snapped into the turbine, the outlet communicating with the inner cavity of the flow guide, and the outlet being positioned above the drain pipe.

[0008] In some embodiments, a water collection cavity is formed between the outer peripheral wall of the guide and the inner wall of the housing, and the drain pipe is connected to the water collection cavity. Under the action of gravity, the water in the water collection cavity can be discharged from the drain pipe.

[0009] In some implementations, the diverter is a hollow cylindrical body, with the inlet diameter larger than the outlet diameter.

[0010] In some embodiments, the housing is provided with a partition plate that divides the housing into two chambers, and the water inlet passes through the partition plate and is connected to the turbine.

[0011] In some implementations, the formula for calculating the total resistance loss within the drain pipe is as follows:

[0012] h w =h f +h j ;

[0013] Among them, h f h represents the pipe friction loss along the drainage pipe. j This is a local resistance loss.

[0014] In some implementations, the pipe friction loss h of the drain pipe f The calculation formula is:

[0015] Local resistance loss h j The calculation formula is:

[0016] Where: λ is the friction coefficient, L is the length of the drain pipe, d is the pipe diameter, v is the airflow velocity, g is the gravitational acceleration, and ξ is the local drag coefficient.

[0017] In some implementations, the total resistance loss within the drain pipe also satisfies Bernoulli's equation:

[0018] Where ΔP is the pressure difference, ΔP=P1-P2, P1 is the turbine outlet pressure, P2 is the ambient pressure, and ρ is the air density.

[0019] In some implementations, the airflow velocity v satisfies the following relationship with the air mass flow rate at the drain port of the drain pipe:

[0020] in, q m1 q represents the air mass flow rate at the drain port of the drain pipe. m2 Let q be the mass flow rate of the air at the turbine outlet and the mass flow rate of the air at the drain port of the drain pipe. m1 The turbine outlet air mass flow rate q m2 0.1%, where s is the area of ​​the drainage port.

[0021] An air circulator includes a turbine drainage structure, wherein the turbine drainage structure is the drainage structure described above.

[0022] The present invention provides a turbine drainage structure and an air circulator having the drainage structure, which have the following beneficial effects:

[0023] Under the action of the anti-icing ring cavity, liquid water is generated at the outlet, and cold air is blown out from the outlet to generate airflow. The liquid water flows with the airflow into the guide vane and then is discharged from the drain pipe. The guide vane of this invention can guide the water generated at the outlet, avoiding water from being stored in the casing for a long time. It effectively solves the problem of collecting and discharging liquid water at the turbine outlet, and improves the comfort and safety of aircraft air conditioning use. Attached Figure Description

[0024] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0026] Figure 1 This is a schematic diagram of the drainage structure of the turbine of the present invention;

[0027] Figure 2 This is a schematic diagram of the water collection cavity of the present invention;

[0028] Figure 3 This is a schematic diagram of the drain pipe of the present invention.

[0029] Attached Figures: 1-Turbine; 101-Outlet; 2-Shell; 201-Separator; 3-Guide; 301-Inlet; 302-Outlet; 303-Water Collection Cavity; 4-Drain Pipe; 5-Anti-icing Inlet Pipe; 6-Anti-icing Ring Cavity. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0035] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0036] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0037] See also Figure 1 As shown, according to an embodiment of the present invention, a drainage structure for a turbine is provided. The turbine 1 has an outlet 101. The drainage structure includes a housing 2 and a guide 3. The housing 2 is connected to the turbine 1. The outlet 101 extends into the housing 2. The guide 3 is located in the housing 2 and connected to the turbine 1. A drain pipe 4 is provided at the bottom of the housing 2. Under the action of airflow, water in the outlet 101 can first flow into the guide 3 and then be discharged from the drain pipe 4.

[0038] Under the action of the anti-icing ring cavity 6, liquid water will be generated at the outlet 101, and cold air will be blown out from the outlet 101 to generate airflow. The water flows with the airflow to the guide 3 and then is discharged from the drain pipe 4. The present invention sets the guide 3 to guide the water generated at the outlet 101, avoiding water from being stored in the housing 2 for a long time. This effectively solves the problem of collecting and discharging liquid water at the turbine 1 outlet 101, and improves the comfort and safety of aircraft air conditioning use.

[0039] It is worth noting that the working process of the anti-icing ring cavity 6 is as follows: high-temperature gas flows into the anti-icing ring cavity 6 from the anti-icing inlet pipe 5. The high-temperature gas heats the turbine 1. After being heated, the turbine 1 radiates the heat to the impeller inside the turbine 1, which increases the temperature of the impeller and prevents ice from forming on the surface of the impeller, as well as between the impeller and the turbine 1.

[0040] See also Figure 2 and Figure 3As shown, the guide vane 3 has an inlet 301 and an outlet 302. The inlet 301 is snapped into the turbine 1, and the outer peripheral wall of the outlet 101 is provided with a stepped structure. The housing 2 is fastened to the stepped structure, and the inlet 301 is snapped into the outlet 101. The outlet 101 communicates with the inner cavity of the guide vane 3, and the outlet 302 is located above the drain pipe 4. In other embodiments, one end of the drain pipe 4 is connected to the guide vane 3, and the other end of the drain pipe 4 is located outside the housing 2. This structure can also achieve water discharge.

[0041] A water collection cavity 303 is formed between the outer peripheral wall of the guide 3 and the inner wall of the shell 2, and the drain pipe 4 is connected to the water collection cavity 303. Under the action of gravity, the water in the water collection cavity 303 can be discharged from the drain pipe 4.

[0042] In this embodiment, the guide vane 3 is connected to the outlet 101. The cold air blown out of the turbine 1 generates airflow in the guide vane 3, thereby drawing water from the outlet 101 into the guide vane 3. When the water flows to the drain port 302 of the guide vane 3, it flows into the water collection cavity 303 under the action of gravity, and then is discharged from the drain pipe 4. The guide vane 3 and the drain pipe 4 of the present invention are used together to discharge water from the housing 2 without changing the external environment and without changing the structure of the housing 2, making full use of the internal space of the housing 2.

[0043] The guide 3 is a hollow cylindrical body. The diameter of the inlet 301 is larger than the diameter of the outlet 101. The inlet 301 is engaged with the outlet 101 and abuts against the stepped structure. A height difference is formed between the inlet 301 and the outlet 101, so that the water generated at the outlet 101 can flow smoothly into the guide 3. In other embodiments, the drain outlet 302 is also set in a funnel shape to facilitate the flow of water into the water collection cavity 303.

[0044] The housing 2 is provided with a partition plate 201 that divides the housing 2 into two chambers. The water inlet 301 passes through the partition plate 201 and is connected to the turbine 1. The partition plate 201 is provided with a through hole, and the guide 3 is stuck in the through hole. The partition plate 201 serves to position and support the guide 3, preventing it from tilting during use and preventing it from detaching from the outlet 101. Moreover, the partition plate 201 not only collects water but also prevents water from flowing back to the outlet 101.

[0045] Due to the pressure difference between the inside and outside, while water is discharged from the drain port of drain pipe 4, some cold air will also flow out from the drain port. If the diameter of the drain port is too large, it will lead to excessive loss of cooling capacity. If the diameter of the drain port 302 is too small, it will be easy to get clogged. Therefore, the diameter of the drain port must ensure that water can be discharged from the drain pipe 4, while preventing excessive loss of cooling capacity.

[0046] The formula for calculating the total resistance loss inside drain pipe 4 is as follows:

[0047] h w =h f +h j ...... (1)

[0048] Among them, h f h represents the pipe friction loss along the drain pipe 4. j This is a local resistance loss.

[0049] Specifically, the pipe friction loss h along drain pipe 4 f The calculation formula is:

[0050]

[0051] Local resistance loss h j The calculation formula is:

[0052]

[0053] Where: λ is the friction coefficient; L is the length of the drain pipe 4, in meters; d is the pipe diameter, in meters; v is the airflow velocity, in meters per second; and g is the acceleration due to gravity, in meters per second. 2 ξ is the local drag coefficient.

[0054] Specifically, the total resistance loss inside drain pipe 4 also satisfies Bernoulli's equation:

[0055]

[0056] Wherein, ΔP is the pressure difference, ΔP = P1 - P2, P1 is the outlet pressure of turbine 1 at 101, with a value of 1.05 to 1.10 bara; P2 is the ambient pressure, in this embodiment, P2 is the ambient pressure when the aircraft is in flight, and satisfies P2 = kP0, where k takes a value of 0.2 to 0.3, and P0 is standard atmospheric pressure; ρ is the air density, in kg / m³. 3 .

[0057] Combining formulas (1) to (4), we can obtain the following formula:

[0058]

[0059] Wherein, the airflow velocity v and the air mass flow rate at the drain port of drain pipe 4 satisfy:

[0060]

[0061] The air mass flow rate at the drain port of drain pipe 4 shall not exceed 0.1% of the air mass flow rate at the outlet 101 of turbine 1. That is, q m1 =ηqm2 q m2 η is the mass flow rate of air at the outlet of turbine 1, where η is 0.001.

[0062] Among them, the friction coefficient λ is 0.3 to 0.4, the local resistance coefficient ξ is 0.1 to 0.2, the pipe length L is 0.5 m, η is 0.001, and the air density ρ is 1.5 kg / m³. 3 Substituting formula (6) into formula (5) yields formula (7), which can be derived from the mass flow rate q of the air at the outlet of turbine 1. m2 The value determines the size of the optimal drainage port diameter d.

[0063]

[0064] According to the air mass flow rate q at the outlet of turbine 1 101 m2 The value of the drain port diameter d determines the value of the drain port diameter d, which can ensure that the water is discharged smoothly from the drain pipe 4, and the value of the drain port diameter d will not be too large, causing a large loss of cooling capacity inside the shell 2. The present invention sets the drain pipe 4 not only to discharge water, but also to take into account the influence of the drain port diameter d on drainage and cooling capacity, so as to calculate the optimal drain port diameter d by formula (7).

[0065] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0066] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A drainage structure for a turbine, said turbine (1) having an outlet (101); characterized in that, The drainage structure includes: A housing (2) is connected to the turbine (1), and an outlet (101) extends into the housing (2); The guide (3) is located in the housing (2) and connected to the turbine (1). The bottom of the housing (2) is provided with a drain pipe (4). Under the action of the anti-icing ring cavity (6), liquid water is generated at the outlet (101). Under the action of the airflow, the water in the outlet (101) can first flow into the guide (3) and then be discharged from the drain pipe (4). The guide (3) has an inlet (301) and an outlet (302). The inlet (301) is engaged with the turbine (1). The outlet (101) is connected to the inner cavity of the guide (3). The outlet (302) is located above the drain pipe (4).

2. The turbine drainage structure according to claim 1, characterized in that, A water collection cavity (303) is formed between the outer peripheral wall of the guide (3) and the inner wall of the shell (2), and the drain pipe (4) is connected to the water collection cavity (303). Under the action of gravity, the water in the water collection cavity (303) can be discharged from the drain pipe (4).

3. The turbine drainage structure according to claim 1, characterized in that, The guide (3) is a hollow cylindrical body, and the diameter of the inlet (301) is larger than the diameter of the outlet (101).

4. The turbine drainage structure according to claim 3, characterized in that, The housing (2) is provided with a partition plate (201) that divides the housing (2) into two chambers, and the water inlet (301) passes through the partition plate (201) and is connected to the turbine (1).

5. The turbine drainage structure according to claim 1, characterized in that, The formula for calculating the total resistance loss inside the drain pipe (4) is as follows: h w =h f +h j ; Among them, h f h is the pipe friction loss of the drainage pipe (4). j This is a local resistance loss.

6. The turbine drainage structure according to claim 5, characterized in that, The pipe friction loss h of the drain pipe (4) f The calculation formula is: ; Local resistance loss h j The calculation formula is: ; Where: λ is the friction coefficient, L is the length of the drain pipe (4), d is the pipe diameter of the drain pipe (4), v is the airflow velocity in the drain pipe (4), g is the gravitational acceleration, and ξ is the local resistance coefficient.

7. The turbine drainage structure according to claim 6, characterized in that, The total resistance loss inside the drain pipe (4) also satisfies Bernoulli's equation: ; Where ΔP is the pressure difference, ΔP=P1-P2, P1 is the outlet (101) pressure of turbine (1), P2 is the external environmental pressure, and ρ is the air density.

8. The turbine drainage structure according to claim 7, characterized in that, The airflow velocity v and the air mass flow rate at the drain port of the drain pipe (4) satisfy the following: ; in, q m1 q is the air mass flow rate at the drain port of the drain pipe (4). m2 The air mass flow rate at the outlet (101) of the turbine (1) and the air mass flow rate q at the drain port of the drain pipe (4) are given. m1 The air mass flow rate q at the outlet (101) of the turbine (1) does not exceed m2 0.1%, where s is the area of ​​the drainage port.

9. An air circulator, comprising a turbine drainage structure, characterized in that, The turbine's drainage structure is the drainage structure described in any one of claims 1 to 8.

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