Turbine shell and turbine

Abstract

The invention discloses a turbine shell and a turbine. The turbine shell is provided with an air inlet, a flow channel and an air outlet, the flow channel is arranged in the shell, and the air inlet is communicated with the air outlet through the flow channel; the shell is provided with an outer surface and an inner surface, the air inlet and the air outlet are formed in the outer surface of the shell, and the flow channel is formed by sinking from the inner surface of the shell to the outer surface of the shell; a cavity is formed between the outer surface of the shell and the inner surface of the shell, the cavity extends in the circumferential direction of the shell to form a ring shape, and a heat insulation part is arranged in the cavity and used for preventing heat from being dissipated to the outside of the shell from the flow channel. According to the scheme, the heat insulation part can isolate heat from the flow channel from being dissipated to the external environment, the temperature of the outer surface of the shell can be reduced, namely, the temperature gradient between the outer surface of the shell and the external environment of the shell is reduced, so that heat loss caused by the fact that the shell dissipates heat to the external environment can be reduced, and the efficiency of the turbine can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of turbines, and in particular to a turbine casing and a turbine. Background Art

[0002] When an existing turbine is working, due to the large temperature gradient between the surface of the turbine housing (TH) and the environment, the turbine housing dissipates a lot of heat to the surrounding environment by heat convection and heat radiation, and the heat loss of the turbine housing is large, which has a great impact on the efficiency of the turbine. Summary of the invention

[0003] The present application provides a turbine casing and a turbine to improve the efficiency of the turbine.

[0004] In a first aspect, the present application provides a turbine housing, the housing being provided with an air inlet, a flow channel and an air outlet, the flow channel being provided inside the housing, the air inlet being connected to the air outlet through the flow channel. The housing has an outer surface and an inner surface, the air inlet and the air outlet being formed on the outer surface of the housing, the flow channel being formed by the inner surface of the housing being recessed toward the outer surface of the housing; a cavity is provided between the outer surface of the housing and the inner surface of the housing, the cavity extending in the circumferential direction of the housing to form a ring, an insulating portion is provided in the cavity, the insulating portion being used to isolate heat from being dissipated from the flow channel to the outside of the housing.

[0005] In a specific possible implementation manner, the heat insulating portion extends in a circumferential direction of the housing to form a ring shape.

[0006] In a specific possible implementation manner, at least a portion of the outer surface of the thermal insulation portion abuts against the inner surface of the cavity.

[0007] In a specific possible implementation manner, in the radial direction of the housing, a projection of the heat insulating portion covers a projection of the flow channel.

[0008] In a specific possible implementation, the inner surface of the shell has a first area and a second area arranged in sequence in the axial direction of the shell, the flow channel is formed in the first area; in the radial direction of the shell, the inner space of the shell corresponding to the second area is used to set the impeller. In the radial direction of the shell, the projection of the insulation part covers the projection of the first area, and the projection of the insulation part covers at least part of the projection of the second area.

[0009] In a specific possible implementation manner, there are multiple cavities, and the multiple cavities are arranged in sequence in the axial direction of the shell.

[0010] In a specific embodiment, adjacent cavities are separated by partition walls, and the partition walls extend in the circumferential direction of the housing to form a ring shape. The partition walls are provided with through holes, and adjacent cavities are connected through the through holes.

[0011] In a specific possible implementation manner, the insulating portion in at least one of the cavities is made of a material different from that of the insulating portions in other cavities.

[0012] In a specific embodiment, the housing is provided with a filling port, the filling port is formed on the outer surface of the housing, the filling port is connected to the cavity, and the filling port is spaced apart from the air inlet and the air outlet in the circumference of the housing.

[0013] In a second aspect, the present application further provides a turbine, comprising an impeller and a turbine housing as in any one of the possible implementation schemes in the first aspect above, wherein the impeller is rotatably disposed in the internal space of the housing, and the impeller is coaxially disposed with the housing.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] The turbine casing provided in the present application has a cavity provided between the outer surface of the casing and the inner surface of the casing, and the cavity is filled with an insulating portion, which can isolate the heat from the flow channel from being dissipated to the external environment, and can reduce the outer surface temperature of the casing, that is, reduce the temperature gradient between the outer surface of the casing and the external environment of the casing, thereby reducing the heat loss caused by the heat dissipation of the casing to the external environment, and can improve the efficiency of the turbine.

[0016] Furthermore, since the cavity of the turbine housing is filled with an insulating part, the heat that would otherwise be dissipated to the external environment by the turbine is retained to a certain extent, so that the exhaust gas of the engine can provide more power to the turbine, which can improve the steady-state and transient performance of the turbine. It can also increase the exhaust temperature of the turbine, which is conducive to more efficient operation of the post-processing.

[0017] In addition, the reduction in the outer surface temperature of the turbine casing can reduce the risk of thermal fatigue cracking of the turbine casing during use, thereby improving the reliability of the turbine casing and further improving the reliability of the entire turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic cross-sectional view of the turbine provided by the present application is shown;

[0019] Figure 2 A schematic cross-sectional structure diagram of a turbine housing provided by the present application is shown;

[0020] Figure 3A simulation analysis diagram of a turbine casing provided by the present application is shown;

[0021] Figure 4 A simulation analysis diagram of a turbine casing provided by the present application is shown;

[0022] Figure 5 A simulation analysis diagram of the turbine casing provided by the present application is shown.

[0023] Reference numerals:

[0024] 1-shell; 11-air inlet; 12-flow channel; 13-air outlet;

[0025] 14- chamber; 15- filling port; 2- insulation part; 3- impeller. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. However, the example implementation can be implemented in various forms and should not be construed as being limited to the implementations set forth herein. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted. The words expressing position and direction described in the embodiments of the present application are all described with reference to the accompanying drawings as examples, but changes may be made as needed, and the changes made are all included in the scope of protection of the present application. The drawings of the embodiments of the present application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0027] The following description sets forth specific details to facilitate understanding of the present application, but the embodiments of the present application can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the embodiments of the present application. Therefore, the present application is not limited to the specific implementation methods disclosed below.

[0028] Figure 1 shows a schematic cross-sectional structure diagram of a turbine provided by the present application, Figure 2 The cross-sectional structure diagram of the turbine housing provided by the present application is shown. Figure 1 and Figure 2 As shown, the embodiment of the present application provides a turbine housing (hereinafter referred to as "housing"), the housing 1 may be provided with an air inlet 11, a flow channel 12 and an air outlet 13, the flow channel 12 is provided inside the housing 1, and the air inlet 11 is connected with the air outlet 13 through the flow channel 12. The housing 1 has an outer surface and an inner surface, the air inlet 11 and the air outlet 13 are formed on the outer surface of the housing 1, and the flow channel 12 is formed by the inner surface of the housing 1 being recessed toward the outer surface of the housing 1.

[0029] In a specific implementation, a closed cavity 14 may be provided between the outer surface of the shell 1 and the inner surface of the shell 1, and the cavity 14 is not connected to the internal space of the shell 1 and the external environment of the shell 1. The cavity 14 may extend in the circumferential direction of the shell 1 to form a ring, that is, the cavity 14 is a cavity 14 that is continuous in the circumferential direction of the shell 1. An insulating portion 2 may be provided in the cavity 14, and the insulating portion 2 may isolate heat from being dissipated from the flow channel 12 to the outside of the shell 1. Exemplarily, the insulating portion 2 may be made of insulating materials such as silicon dioxide, silicate, asbestos or rock wool.

[0030] The turbine casing provided in the embodiment of the present application has a cavity 14 provided between the outer surface of the casing 1 and the inner surface of the casing 1, and the cavity 14 is filled with an insulating portion 2, which can isolate the heat from the flow channel 12 from being dissipated to the external environment, and can reduce the outer surface temperature of the casing 1, that is, reduce the temperature gradient between the outer surface of the casing 1 and the external environment of the casing 1, thereby reducing the heat loss caused by the heat dissipation of the casing 1 to the external environment, and can improve the efficiency of the turbine.

[0031] In actual applications, the exhaust gas (with a certain temperature and pressure) generated by the engine enters the turbine, provides power for the turbine, drives the turbine's impeller 3 to rotate, and generates a greater negative pressure at the engine's air inlet, allowing the engine to inhale more air, thereby making the fuel in the engine burn more fully, and the engine can release stronger power and have a smaller exhaust gas displacement. Since the cavity 14 of the turbine housing 1 is filled with an insulating portion 2, the heat that would otherwise be dissipated by the turbine to the external environment is retained to a certain extent, so that the engine's exhaust gas can provide more power for the turbine, and can improve the turbine's steady-state and transient performance. In addition, the turbine exhaust temperature can be increased, which is conducive to more efficient post-processing.

[0032] In addition, the reduction in the outer surface temperature of the turbine casing 1 can reduce the risk of thermal fatigue cracking of the turbine casing 1 during use, thereby improving the reliability of the turbine casing 1 and further improving the reliability of the entire turbine.

[0033] In specific implementation, the insulating portion 2 can extend in the circumferential direction of the shell 1 to form a ring shape, that is, the insulating portion 2 can be a continuous ring structure in the circumferential direction of the shell 1, which is consistent with the shape of the flow channel 12 and can fully isolate the heat from the flow channel 12 from being dissipated to the external environment in the form of heat conduction and heat radiation.

[0034] In actual configuration, at least part of the outer surface of the heat insulating portion 2 abuts against the inner surface of the cavity 14, so that the heat insulating portion 2 can fully exert its heat isolating effect. Specifically, the heat insulating portion 2 can fill the entire cavity 14, and the entire outer surface of the heat insulating portion 2 abuts against the inner surface of the cavity 14; or, two surfaces of the heat insulating portion 2 opposite to each other in the radial direction of the shell 1 abut against the inner surface of the cavity 14 respectively.

[0035] As a possible implementation, in the radial direction of the shell 1, the projection of the insulation part 2 can cover the projection of the flow channel 12, that is, the insulation part 2 covers the setting range of the flow channel 12, so that the insulation part 2 can more reliably isolate the heat from the flow channel 12 from dissipating to the external environment.

[0036] In a specific implementation, the inner surface of the shell 1 has a first area and a second area arranged in sequence in the axial direction of the shell 1. The flow channel 12 can be formed in the first area. In the radial direction of the shell 1, the internal space of the shell 1 corresponding to the second area can be provided with an impeller 3. Specifically, the impeller 3 can be rotatably arranged in the internal space of the shell 1, and the impeller 3 is coaxially arranged with the shell 1. In the radial direction of the shell 1, the projection of the insulation part 2 covers the projection of the first area, and the projection of the insulation part 2 covers at least part of the projection of the second area, that is, the insulation part 2 not only covers the setting range of the flow channel 12, but also covers at least part of the setting range of the impeller 3, which can reduce the heat loss caused by the heat dissipation of the shell 1 to the external environment to a greater extent, and can further improve the efficiency of the turbine.

[0037] In a possible implementation, the number of cavities 14 may be multiple, and the multiple cavities 14 may be arranged in sequence in the axial direction of the shell 1. This can reduce the heat loss caused by the shell 1 radiating heat to the external environment in a larger range, and can further improve the efficiency of the turbine.

[0038] In specific implementation, adjacent cavities 14 may be separated by partition walls, and the partition walls may extend in the circumferential direction of the shell 1 to form a ring shape, that is, the partition wall may be a continuous ring structure in the circumferential direction of the shell 1, so that each cavity 14 remains in a ring shape. The partition wall may be provided with through holes, and adjacent cavities 14 may be connected through the through holes, and the heat insulating portion 2 may extend into the through holes, so that the heat insulating portions 2 in adjacent cavities 14 may be connected as a whole, which is convenient for the setting of the heat insulating portion 2, and the heat insulating portions 2 in multiple cavities 14 may cooperate together, which may achieve a more ideal effect of lowering the outer surface temperature of the shell 1 and reducing heat loss.

[0039] In actual configuration, the insulating portion 2 in at least one cavity 14 may be made of a different material from the insulating portion 2 in other cavities 14. For example, the insulating portion 2 in the cavity 14 corresponding to the flow channel 12 in the radial direction of the shell 1 may be made of an insulating material with a better heat insulation performance, so that the key heat dissipation area can be targeted for stronger heat insulation.

[0040] In a specific implementation, the housing 1 may be provided with a filling port 15, which may be formed on the outer surface of the housing 1. In the circumferential direction of the housing 1, the filling port 15 may be spaced apart from the air inlet 11 and the air outlet 13. The filling port 15 may be communicated with the cavity 14, and the heat insulating part 2 may be filled into the cavity 14 through the filling port 15, and the filling port 15 may be closed after the filling is completed.

[0041] Figure 3 , Figure 4 , Figure 5 The simulation analysis diagrams of the turbine housing provided by the present application are shown respectively. Figure 3 As shown in Figure 1, a computational fluid dynamics (CFD) analysis was performed on the casing of a turbine. At the optimal fuel consumption point of the engine, the average temperature of the casing dropped by about 130°C. Figure 4 As shown in Figure 2, at the highest torque point of the engine, the average temperature of the housing drops by about 180°C. Figure 5 As shown, at the rated point of the engine, the average temperature of the casing is reduced by about 190°C.

[0042] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited to the above embodiments. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope and spirit of the present application. If these changes and modifications fall within the scope of the claims of the present application and their equivalent technologies, the intention of the present application also includes these changes and modifications.

Claims

1. A turbine housing, characterized in that: The shell is provided with an air inlet, a flow channel and an air outlet, the flow channel is provided inside the shell, and the air inlet is communicated with the air outlet through the flow channel; The shell has an outer surface and an inner surface, the air inlet and the air outlet are formed on the outer surface of the shell, and the flow channel is formed by the inner surface of the shell being recessed toward the outer surface of the shell; a cavity is provided between the outer surface of the shell and the inner surface of the shell, the cavity extends in the circumferential direction of the shell to form a ring shape, and an insulating portion is provided in the cavity, and the insulating portion is used to isolate heat from being dissipated from the flow channel to the outside of the shell.

2. The turbine housing according to claim 1, characterized in that The heat insulating portion extends in a circumferential direction of the housing to form a ring shape.

3. The turbine housing according to claim 1 or 2, characterized in that At least a portion of the outer surface of the heat insulating portion abuts against the inner surface of the cavity.

4. The turbine housing according to any one of claims 1 to 3, characterized in that: In the radial direction of the housing, a projection of the heat insulating portion covers a projection of the flow channel.

5. The turbine housing according to claim 4, characterized in that The inner surface of the shell has a first area and a second area arranged in sequence in the axial direction of the shell, and the flow channel is formed in the first area; in the radial direction of the shell, the inner space of the shell corresponding to the second area is used to set the impeller; In the radial direction of the housing, the projection of the heat insulating portion covers the projection of the first region, and the projection of the heat insulating portion covers at least a portion of the projection of the second region.

6. The turbine housing according to any one of claims 1 to 5, characterized in that: There are multiple cavities, and the multiple cavities are arranged in sequence in the axial direction of the shell.

7. The turbine housing according to claim 6, characterized in that Adjacent cavities are separated by partition walls, and the partition walls extend in the circumferential direction of the shell to form a ring shape; The partition wall is provided with a through hole, and the adjacent cavities are connected through the through hole.

8. The turbine housing according to claim 6 or 7, characterized in that The material of the heat insulating portion in at least one of the cavities is different from that of the heat insulating portions in the other cavities.

9. The turbine housing according to any one of claims 1 to 8, characterized in that: The shell is provided with a filling port, the filling port is formed on the outer surface of the shell, and the filling port is communicated with the cavity; In the circumferential direction of the shell, the filling port is spaced apart from the air inlet and the air outlet, respectively.

10. A turbine, characterized in that: comprising an impeller and a turbine housing as claimed in any one of claims 1 to 9; The impeller is rotatably disposed in the inner space of the housing, and the impeller is coaxially disposed with the housing.

Images