Power turbine flow guide device

Abstract

The invention belongs to the technical field of aircraft power devices, and discloses a power turbine flow guide device which comprises a first flow guide part, a second flow guide part and a third flow guide part, the first flow guide part is provided with a first flow channel and a second flow channel, the first flow channel is arranged in the axial direction, the section of the first flow channel is annular, and the second flow channel is arranged on the periphery of the first flow channel in the axial direction; the first flow guide part further comprises a plurality of third flow channels which penetrate through the first flow channels and the second flow channels to communicate the interiors of the first flow channels and the second flow channels with the exteriors; a fourth flow channel is further formed in at least part of the third flow channel, and the fourth flow channel penetrates in from one side of the third flow channel and penetrates out from the other side of the third flow channel; the guide blade is arranged at the air inlet position of the first flow channel. The invention aims to provide the power turbine flow guide device so as to provide novel turbine power generation device configuration equipment and improve the efficiency of the whole turbine power device.

Description

Technical Field

[0001] The present invention belongs to the technical field of aircraft power plants, and particularly relates to a power turbine flow guiding device. Background Art

[0002] In the existing rear-mounted scheme of a turbo generator, the generator is arranged at the rear of the turbine engine, and the power turbine shaft is directly connected to the generator. The structure is simple and light, but the generator will be directly exposed to high-temperature gas, making cooling difficult. The existing solution is to change the exhaust of the turbine to a side exhaust type, that is, through an extended elbow pipe, the high-temperature gas is discharged from the side, but this scheme will still generate heat radiation and cause a significant impact on the generator.

[0003] For the above reasons, we propose a flow guiding device for turbo power generation with a new structure. Summary of the Invention

[0004] Aiming at the above existing problems, the technical object of the present invention is to provide a power turbine flow guiding device so that the air flow flows in a set manner.

[0005] The present invention is achieved through the following technical solutions:

[0006] A power turbine flow guiding device of the present invention includes:

[0007] A first flow guiding portion having a first flow channel with an annular cross-section arranged in the axial direction and a second flow channel with an annular cross-section arranged on the outer periphery of the first flow channel in the axial direction, and a plurality of guide vanes are provided in the first flow channel.

[0008] In some embodiments, the first flow guiding portion further includes a plurality of third flow channels that penetrate through the first flow channel and the second flow channel to connect their interiors to the outside.

[0009] In some embodiments, at least a part of the third flow channel further forms a fourth flow channel that penetrates into the third flow channel from one side and exits from the other side of the third flow channel.

[0010] In some embodiments, the guide vanes are provided at the air inlet of the first flow channel.

[0011] In some embodiments, it further includes a second flow guiding portion, and a space for installing a power turbine is formed between the second flow guiding portion and the first flow guiding portion.

[0012] In some embodiments, one end of the fourth flow channel extends out of the third flow channel, and the other end extends to the end face on the exhaust side of the first flow guiding portion.

[0013] In some embodiments, the second flow guiding portion includes a fifth flow channel with an annular cross-section arranged in its axial direction,

[0014] and several sixth flow channels that pass through the fifth flow channel and connect the outside and inside of the second flow guiding part.

[0015] In some embodiments, a receiving cavity capable of communicating with the first flow channel is further provided inside the second flow guiding part, and the sixth flow channel connects the receiving cavity with the outside of the second flow guiding part.

[0016] In some embodiments, a cylindrical bearing mounting seat is further provided in the middle of the first flow guiding part. A seventh flow channel is formed between the bearing mounting seat and the first flow guiding part, and the seventh flow channel communicates with the third flow channel.

[0017] In some embodiments, stator vanes are provided at the discharge end of the fifth flow channel.

[0018] The beneficial effects of the present invention at least include:

[0019] The power turbine flow guiding device proposed by the present invention forms a layered flow channel, and at the same time isolates the high-temperature gas flow by introducing low-temperature gas flow, that is, isolates the second flow channel for external circulation of high-temperature gas through the first flow channel of the first flow guiding part, so as to solve the problem of high temperature of the generator, and at the same time enables the high-temperature and high-pressure gas flow to flow along the axial direction of the turbine power generation device to provide thrust; the second flow guiding part can provide the corresponding gas required for the first flow guiding part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the turbine flow guiding structure with an inner channel of the present application;

[0021] Figure 2 is a three-dimensional structural diagram of the turbine rear flow guiding part of the present application;

[0022] Figure 3 is a schematic cross-sectional structure diagram in one direction of the present application;

[0023] Figure 4 is a schematic cross-sectional structure diagram in another direction of the present application;

[0024] Figure 5 is a schematic structural diagram of the power turbine of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0027] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The present invention will be described in detail below with reference to the accompanying drawings.

[0029] As Figures 1-5 shown, the present invention provides a power turbine guide device, including: a first guide portion 1, having a first flow channel 101 with an annular cross-section arranged along the axial direction and a second flow channel 102 with an annular cross-section arranged along the outer periphery of the first flow channel 101 in the axial direction. A plurality of guide vanes 104 are provided in the first flow channel 101, and the guide vanes are arranged at the air inlet of the first flow channel 101. The first guide portion 1 further includes a plurality of third flow channels 103 that penetrate through the first flow channel 101 and the second flow channel 102 to communicate their interiors to the outside.

[0030] Specifically, the outer shape of the first guide portion 1 can be approximately cylindrical, such as Figure 1 and Figure 2As shown in the figure. The first flow guiding part 1 forms two layers of first flow channels 101 and second flow channels 102 which are generally arranged along the axial direction from the inside to the outside. The lengths of the first flow channels 101 and the second flow channels 102 can be adjusted according to actual needs. Among them, a number of guiding vanes 104 provided in the first flow channels 101 can rectify the air flow entering the flow channels, reduce turbulence and eddy current, and improve the air flow circulation efficiency. Through the provided third flow channel 103, the third flow channel 103 flows from the inside of the first flow guiding part 1 to its outside. Due to the structural setting, the third flow channel 103 needs to pass through the first flow channel 101 and the second flow channel 102. The third flow channel 103 is of a flat structure, which can reduce the blockage of the air flow in the first flow channel 101 and the second flow channel 102. The first flow channel 101, the second flow channel 102 and the third flow channel 103 are an integral structure. The number of the third flow channels 103 can be set according to needs, usually 3 - 8 can be set, and generally 4 can be sufficient. The first flow channel 101 and the second flow channel 102 are arranged along the axial direction, which can improve the overall efficiency of the power device and is different from the prior art of exhausting air through an elongated elbow on the side.

[0031] In some embodiments, at least a part of the third flow channel 103 is further formed with a fourth flow channel 105. The fourth flow channel 105 penetrates into the third flow channel 103 from one side and penetrates out from the other side of the third flow channel 103. Specifically, the fourth flow channel 105 is not communicated with the third flow channel 103. The fourth flow channel 105 can be used to circulate media such as fuel. Generally, there are two fourth flow channels 105, or there can be more. They are respectively arranged in two of the third flow channels 103. One fourth flow channel 105 serves as a liquid inlet pipe, and the other flow channel serves as a liquid discharge pipe, so as to form a circulation loop. The rear end of the first flow guiding part 1 is connected with a generator 3. The fourth flow channel 105 is used for heat exchange cooling of the outer shell of the generator 3. The third flow channel 103 can be communicated to the inside of the generator 3, and the inside of the generator 3 is cooled by pumping air through an air extraction impeller.

[0032] In some embodiments, a second flow guiding part 2 is further included. A space for installing a power turbine is formed between the second flow guiding part 2 and the first flow guiding part 1. Specifically, the first flow guiding part 1 or the second flow guiding part 2 has an extended outer shell part, such as Figure 1 or Figure 3As shown, an annular extension 108 is provided on one side of the first flow guide part 1 close to the second flow guide part 2, so as to form a space for installing the power turbine 4 with the second flow guide part 2. The power turbine 4 has a first blade group 41 and a second blade group 42. The first blade group 41 is installed on the outer periphery of the second blade group 42. The second blade group 42 is evenly installed on the outer periphery of the carrier disk 44. A separation ring 43 that separates the first blade group 41 and the second blade group 42 is installed on the outer periphery of the second blade group 42, as Figure 5 shown.

[0033] In some embodiments, one end of the fourth flow channel 105 extends out of the third flow channel 103, and the other end extends to the end face on the exhaust side of the first flow guide part 1. By setting like this, the fourth flow channel 105 can be better connected to other related cooperating components, such as the connecting pipe connecting to the heat dissipation object of the generator 3 and the fuel pipe connected to the outside.

[0034] In some embodiments, a cylindrical bearing mounting seat 106 is further provided in the middle of the first flow guide part 1. A seventh flow channel 107 is formed between the bearing mounting seat 106 and the first flow guide part 1. Specifically, the inside of the bearing mounting seat 106 is used to install bearings and a rotating shaft. The power turbine 4 is connected to the generator 3 through the rotating shaft. The seventh flow channel 107 between the bearing mounting seat 106 and the first flow guide part 1 can communicate with the third flow channel 103,

[0035] In some embodiments, the second flow guide part 2 includes a fifth flow channel 201 with an annular cross-section arranged along its axial direction, and a plurality of sixth flow channels 202 that pass through the fifth flow channel 201 and connect the outside and the inside of the second flow guide part 2. The fifth flow channel 201 is arranged substantially along the axial direction along the axial direction, and the fifth flow channel 201 can have a certain degree of bending. A receiving cavity 203 that can communicate with the first flow channel 101 is further provided in the second flow guide part 2. The sixth flow channels 202 connect the receiving cavity 203 with the outside of the second flow guide part 2. In actual use, the sixth flow channels 202 can introduce gas into the receiving cavity 203 to provide the required gas for the power turbine blades 42.

[0036] In some embodiments, stator blades 204 are provided at the discharge end of the fifth flow channel 201 to provide fluid in the required direction for the power turbine 4 to improve the turbine efficiency.

[0037] In the present invention, the first flow channel 101, the second flow channel 102, the third flow channel 103, the guide vane 104 and the fourth flow channel 105 are arranged as an integral structure and can be formed by 3D printing. The connection between the first diversion part 1 and the second diversion part 2 can be connected by a self-locking nut 5. Other components, such as wires, etc., can also be provided in part of the third flow channel 103.

[0038] Based on the above solutions, in some other embodiments, part of the third flow channel 103 passes through the first flow channel 101 and the second flow channel 102 to connect the inside and outside of the first diversion part 1. Part of the third flow channel 103 is only arranged in the second flow channel 102 to wrap the components passing through it, and the third flow channel 103 is not connected to the first flow channel 101 and the second flow channel 102.

[0039] In this application, by providing the first flow channel 101 and the second flow channel 102, the airflows at different temperatures are separated. Specifically, the inner first flow channel 101 is used for circulating low-temperature gas, and the outer second flow channel 102 is used for circulating high-temperature gas. The low-temperature gas inside is used to isolate the high-temperature gas outside to achieve temperature control of power generation devices, etc., so that each device operates well. By providing the fourth flow channel 105 and other components in the third flow channel 103, heat insulation for other components and the gas flowing in the fourth flow channel 105 can also be achieved. Through the fifth flow channel 201 of the second diversion part 2, the second diversion part 2 is connected to the gas generator and plays a role in guiding the high-temperature and high-pressure airflow ejected by the gas generator. The fifth flow channel 201 can provide high-temperature and high-pressure power airflow for the second flow channel 102. The provided sixth flow channel 202 and the accommodation cavity 203 can provide low-temperature gas for the first flow channel 101. The innovative overall flow channel design of the present invention provides a new structure for the turbine power generation device, making the turbine power generation device more efficient.

[0040] The above are only the preferred embodiments of this application and do not impose any form of limitation on this application. Although this application has been disclosed above with preferred embodiments, it is not intended to limit this application. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above-mentioned technical content as equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of this application, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of this application still fall within the scope of the solution of this application.

Claims

1. A power turbine guide device, characterized in that, Comprising: A first flow guiding part (1) having a first flow channel (101) with an annular cross-section arranged in the axial direction and a second flow channel (102) with an annular cross-section arranged on the outer periphery of the first flow channel (101) in the axial direction. A plurality of guide vanes (104) are provided in the first flow channel (101).

2. The power turbine guide device according to claim 1, characterized in that, The first flow guiding part (1) further includes a plurality of third flow channels (103) that pass through the first flow channel (101) and the second flow channel (102) to connect their interiors to the exterior.

3. The power turbine guide device according to claim 2, characterized in that At least part of the third flow channel (103) further forms a fourth flow channel (105). The fourth flow channel (105) penetrates into the third flow channel (103) from one side and exits from the other side of the third flow channel (103).

4. The power turbine guide device according to claim 1, characterized in that The guide vanes are provided at the air inlet of the first flow channel.

5. The power turbine guide device according to claim 1, characterized in that, It further includes a second flow guiding part (2). A space for installing a power turbine is formed between the second flow guiding part (2) and the first flow guiding part (1).

6. The power turbine flow guiding device according to claim 3, wherein One end of the fourth flow channel (105) extends out of the third flow channel (103), and the other end extends to the end face on the exhaust side of the first flow guiding part (1).

7. The power turbine guide device according to claim 5, characterized in that, The second flow guiding part (2) includes a fifth flow channel (201) with an annular cross-section arranged in its axial direction, and a plurality of sixth flow channels (202) that pass through the fifth flow channel (201) to connect the exterior and the interior of the second flow guiding part (2).

8. The power turbine guide device according to claim 7, characterized in that, An accommodation cavity (203) that can be connected to the first flow channel (101) is further provided in the second flow guiding part (2). The sixth flow channels (202) connect the accommodation cavity (203) to the exterior of the second flow guiding part (2).

9. The power turbine guide device according to claim 1, characterized in that, A cylindrical bearing mounting seat (106) is further provided in the middle of the first flow guiding part (1). A seventh flow channel (107) is formed between the bearing mounting seat (106) and the first flow guiding part (1), and the seventh flow channel (107) is connected to the third flow channel (103).

10. The power turbine guide device according to claim 7, characterized in that, A stator vane (204) is provided at the discharge end of the fifth flow channel (201).

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