Cooling structure of turbine power generation device
By introducing an extraction impeller and a multi-layer sleeve structure into the turbine generator, combined with gas and fuel cooling methods, and designing guide sections and flow channels, the problem of generator cooling difficulties was solved, achieving effective cooling and structural simplification, and improving overall efficiency and fuel efficiency.
Patent Information
- Application Number
- CN202520359091.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Existing turbine generator cooling structures present cooling difficulties in both front-mounted and rear-mounted generator configurations, especially since the generator is directly exposed to high-temperature combustion gases. Existing turbine generator cooling structures in front-mounted configurations are complex in structure and have complex vibration patterns, making them unsuitable for small-scale devices. In rear-mounted configurations, cooling is difficult, and existing side-vented configurations still generate thermal radiation effects.
By employing an extraction impeller and a multi-layer sleeve structure, and by setting up axial heat dissipation channels inside the generator, combined with gas and fuel cooling methods, the design of the guide section and channels utilizes low-temperature gas and fuel for cooling, isolates the influence of high-temperature combustion gas, and improves the generator's operating temperature range.
It achieves effective cooling of the generator, improves fuel efficiency, enhances the overall efficiency of the power generation unit, provides additional thrust through axial exhaust of gas, simplifies the structure, and reduces vibration complexity.
Smart Images
Figure CN223634786U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to aircraft power device heat dissipation technical field, especially relates to a turbine power generation device cooling structure. BACKGROUND
[0002] In the field of pure electric unmanned aerial vehicle, the power source is battery pack, and the endurance time of pure electric unmanned aerial vehicle is short due to the constraint of existing battery technology, and the pure electric unmanned aerial vehicle cannot work for a long time, and considering the safety factor of the aircraft, the battery needs to have a certain amount, so that the actual endurance time is shorter, even if the battery technology is upgraded in the future, the pure electric unmanned aerial vehicle is difficult to meet the long endurance requirement under the new demand, so the power generation device is needed to provide electric energy for the unmanned aerial vehicle, and the turbine power generation device is used to provide electric energy for the unmanned aerial vehicle at present.
[0003] However, the existing turbine power generation device can be divided into two categories of schemes, namely generator front and generator rear. In the generator front scheme, the generator is arranged in the front part of the turbine engine (or gas generator), the output shaft of the power turbine passes through the middle of the turbine engine shaft, and drives the generator to rotate, which can arrange the generator in the low-temperature front part of the engine, and is beneficial to the cooling of the generator, but the structure is complex, the whole transmission shaft is long and thin, and the connection pairs are many, so that the vibration law is extremely complex, and it is not suitable for small turbine power generation device. In the generator rear scheme, the generator is arranged in the rear part of the turbine engine, the power turbine shaft is directly connected with the generator, the structure is simple and light, but the generator is directly exposed to the high-temperature gas, and the cooling is difficult, and the existing solution is to change the exhaust of the turbine into a side exhaust type, that is, the high-temperature gas is discharged from the side through the lengthened elbow pipe, but the scheme still has a significant influence on the generator due to the heat radiation.
[0004] Based on the above reasons, a better turbine power generation device cooling structure is urgently needed. UTILITY MODEL CONTENTS
[0005] In view of the above problems, the technical purpose of the utility model is to provide a turbine power generation device cooling structure to ensure that the generator works in a suitable temperature range.
[0006] The utility model realizes the following technical scheme:
[0007] The utility model provides a turbine power generation device cooling structure, which comprises:
[0008] The generator is further provided with an air extraction impeller for heat dissipation on the rotating shaft of the generator, and the air extraction impeller is installed on the heat dissipation flow channel formed between the generator stator and the generator rotor;
[0009] The turbine rotor is used for driving the generator to generate electricity.
[0010] In some embodiments, a first sleeve is sleeved on the housing of the generator, and a fluid passage is formed between the first sleeve and the housing of the generator.
[0011] In some embodiments, the air extraction impeller is installed at the gas exhaust outlet of the heat dissipation flow channel.
[0012] In some embodiments, a second sleeve is sleeved on the first sleeve, and a fluid passage along the axial direction of the generator is formed between the second sleeve and the first sleeve.
[0013] In some embodiments, the heat dissipation flow channel is communicated with the outside of the turbine generator through a third flow channel near one side of the turbine rotor, the third flow channel is arranged on the first flow guide part, and the third flow channel is communicated with the outside of the turbine generator through the high-temperature gas flow channel of the first flow guide part.
[0014] In some embodiments, a first flow guide part is further installed between the turbine rotor and the generator, the first flow guide part comprises a first flow channel and a second flow channel arranged along the axial direction thereof, the first flow channel is formed at the outer periphery of the second flow channel, and the second flow channel is communicated with the fluid passage between the second sleeve and the first sleeve.
[0015] In some embodiments, an oil pipe is connected to the inlet and outlet of the fluid passage between the first sleeve and the housing of the generator, and the oil pipe is connected with the outside from the third flow channel.
[0016] In some embodiments, the connecting line of the generator is connected with the outside from the third flow channel.
[0017] In some embodiments, a fourth flow channel communicated with a cooling flow channel is formed in the pipe wall of the third flow channel, and the fourth flow channel is communicated with the outside of the first flow guide part.
[0018] In some embodiments, the oil pipe is arranged at one end of the generator close to the turbine rotor.
[0019] The effective benefits of the utility model at least include:
[0020] The turbine generator cooling structure provided by the utility model adopts innovative component mode, cools the turbine generator through the internal and external cooling mode of gas and oil, and improves fuel efficiency by reasonably setting the flow direction of air flow, the structure of the turbine rotor and the structure of the generator. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 is a sectional structure schematic diagram of a turbine power generation device cooling structure of the present application;
[0022] Figure 2 is a sectional structure schematic diagram of a turbine power generation device cooling structure of the present application;
[0023] Figure 3 is a sectional structure schematic diagram of a turbine power generation device cooling structure of the present application;
[0024] Figure 4 is a structure schematic diagram of a turbine rotor of the present application;
[0025] Figure 5 is a structure schematic diagram of a first sleeve of the present application;
[0026] Figure 6 is a sectional view of A-A in the present application Figure 1 is a sectional view of A-A in the present application DETAILED DESCRIPTION
[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be clearly and completely described below in combination with the drawings of the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.
[0028] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0029] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0030] The present application will be described in detail below in combination with the drawings.
[0031] As shown in Figures 1-6 The present application provides a turbine power generation device cooling structure, which comprises:
[0032] Turbine rotor 5 is used to drive the generator to generate electricity;
[0033] The generator 7 has at least one heat dissipation channel 71 running through it along its axial direction.
[0034] Specifically, such as Figure 4 As shown, the turbine rotor 5 has a first blade group 51 and a second blade group 52. The first blade group 51 is installed on the outer periphery of the second blade group 52, and the second blade group 52 is evenly installed on the outer periphery of the support plate 54. A separating ring 53 is installed on the outer periphery of the second blade group 52 to separate the first blade group 51 and the second blade group 52. The turbine power generation device cooling structure is used in the turbine power generation device, mainly for cooling and / or heat insulation of the generator, ensuring the normal operation of the generator, and maximizing the overall efficiency of the power generation device. The turbine power generation device includes a gas generator, and the generator 7 is installed at the exhaust end of the gas generator, so it is necessary to ensure the operating temperature of the generator 7. The high-temperature and high-pressure gas generated by the gas generator does work on the first blade group 51 of the turbine rotor 5, causing the turbine rotor 5 to rotate as a whole. The rotation of the second blade group 52 causes the cooling airflow to flow into the first guide section 6. The high-temperature and high-pressure gas downstream of the first blade group 51 and the cooling airflow formed by the work done by the second blade group 52 are sent downstream through the flow channel of the first guide section 6. The turbine rotor 5 has a first blade group 51 connected to a first air intake channel 31, and a second blade group 52 connected to a second air intake channel 32. The first air intake channel 31 introduces high-temperature and high-pressure gas generated by the gas generator into the first blade group 51, and the second air intake channel 32 introduces low-temperature gas into the second blade group 52. Here, low-temperature gas refers to air introduced from outside the turbine power generation device.
[0035] Firstly, the generator 7 is effectively cooled by providing at least one heat dissipation channel 71 running axially through the generator 7. There may be multiple heat dissipation channels 71. In some embodiments, the heat dissipation channel 71 is formed in an annular channel between the generator stator 73 and the generator rotor 72, wherein there is a gap between the generator stator 73 and the generator rotor 72, forming a gas flow channel that enters from one end of the generator 7 and exits from the other end, thus forming a cooling channel.
[0036] In some embodiments, the shaft 12 of the generator 7 is further provided with an air extraction impeller 11, which can be arranged on the shaft 12 of the generator 7 close to the turbine rotor 5, or more preferably, the air extraction impeller 11 is arranged on the shaft 12 of the generator 7 away from the turbine rotor 5, i.e. the air extraction impeller 11 is arranged at the tail of the generator 7 (the end of the heat dissipation flow channel 71 / exhaust end). The air extraction impeller 11 can be arranged in the generator shell, or the generator shell can be provided with an impeller cover 13 around the periphery of the impeller cover 13, which is integrated with the generator shell / first sleeve or is arranged on the generator shell / first sleeve. The impeller cover 13 should be cylindrical so that the airflow flows along the axial direction thereof.
[0037] In some embodiments, the generator 7 is provided with a first sleeve 8, which forms a fluid passage with the shell of the generator 7. The first sleeve 8 is further provided with a second sleeve 9, which forms a fluid passage along the axial direction of the generator 7 with the first sleeve 8. The fluid passage between the second sleeve 9 and the first sleeve 8 communicates with the flow channel where the second blade group 52 is arranged, so that the cooling gas delivered by the second blade group 52 flows into the fluid passage between the second sleeve 9 and the first sleeve 8, thereby isolating the generator 7 from the high-temperature exhaust gas generated by the gas generator. The first sleeve 8 has two flow channel openings 81 for liquid inlet and liquid outlet, respectively, which are arranged on the first sleeve 8, as shown in Figure 5
[0038] In some embodiments, the heat dissipation flow channel 71 is connected to the outside of the turbine generator through a third flow channel 63 near one side of the turbine rotor, the third flow channel 63 is arranged on the first flow guide part 6, the third flow channel 63 is integrated with the first flow guide part 6, and the third flow channel 63 is connected to the outside of the turbine generator through the high-temperature gas flow channel of the first flow guide part 6. A first flow guide part 6 is further arranged between the turbine rotor 5 and the generator 7, the first flow guide part 6 includes a first flow channel 61 and a second flow channel 62 arranged in the axial direction thereof, the first flow channel 61 is arranged on the outer periphery of the second flow channel 62, and the second flow channel 62 is connected to the fluid passage between the second sleeve 9 and the first sleeve 8. Specifically, the first flow guide part 6 is generally in a cylindrical structure with a central axis, the first flow channel 61 and the second flow channel 62 can be arranged in an annular structure around the axis of the first flow guide part 6, the high-temperature gas flow channel of the first flow guide part 6 is the first flow channel 61, and the second flow channel 62 is connected to the flow channel where the second blade group 52 is arranged. The second flow channel 62 conveys low-temperature gas, thereby insulating the high-temperature gas conveyed by the first flow channel 61, and the first flow channel 61 and the second flow channel 62 are designed in the axial direction of the first flow guide part 6. In addition to providing power for the generator 7 to generate electricity, the first flow channel 61 and the second flow channel 62 can also utilize the excess high-temperature gas to generate backward thrust power, thereby improving the overall efficiency of the power device.
[0039] In some embodiments, the fluid passage between the first sleeve 8 and the shell of the generator is connected with a fuel pipe 10 at the inlet and outlet thereof, and the fuel pipe 10 passes through the third flow channel 63 and is connected to the outside. The fluid passage formed between the first sleeve 8 and the shell of the generator can cover the outer cylindrical surface of the generator 7, thereby maximizing the heat exchange area and improving the heat dissipation efficiency. In addition, fuel is conveyed through the fluid passage between the first sleeve 8 and the shell of the generator 7, and the generator 7 is cooled by the fuel, thereby improving the combustion efficiency of the fuel by utilizing heat exchange to increase the temperature of the fuel. By arranging the fuel pipe 10 to pass through the third flow channel 63, the influence of the high-temperature gas discharged from the first flow channel 61 can be avoided, and the compactness of the overall structure of the turbine generator can be improved.
[0040] In some embodiments, the high-temperature gas directly heats the pipe wall of the third flow channel 63, and therefore, in order to reduce the influence of the high-temperature gas, the temperature rise problem of the third flow channel 63 needs to be solved, and an implementation manner that can be adopted is that a fourth flow channel 631 in communication with a cooling flow channel is formed in the pipe wall of the third flow channel 63, and the fourth flow channel 631 is in communication with the outside of the first flow guide part 6, and therefore, by forming the fourth flow channel 631 in the pipe wall of the third flow channel 63, the heat shielding effect of the high-temperature gas flow in the third flow channel 61 can be achieved, and the temperature of the gas flow in the third flow channel 63 is prevented from being too high. In order to facilitate the flow of the gas flow in the fourth flow channel 631, a drainage hole 632 is arranged on the pipe wall of the third flow channel 63, and a small amount of gas can be discharged through the drainage hole 632, as shown in Figure 3 .
[0041] As shown in Figure 2 , in the utility model, the high-temperature gas discharged from the gas generator works on the first vane group 51 and is discharged from the first flow channel 61, and this fluid route is a high-temperature gas flow path 001; in the utility model, the second vane group 52 works on the gas, and low-temperature gas is introduced to pressurize the gas and transport the gas to the second flow channel 62 and further to the fluid passage formed between the second sleeve 9 and the first sleeve 8, and then the gas is discharged, and this flow channel is a first cooling flow path 002; in the utility model, the third flow channel 63 introduces air from the outside of the turbine generator device, passes through the inside of the generator 7 and is discharged through the air extraction impeller 11, and this is a second cooling flow path 003; in the utility model, oil is introduced from one side through the oil pipeline 10, is transported to the oil discharge end of the other oil pipeline 10 through the fluid passage between the first sleeve 8 and the shell of the generator 7 and around the shell of the generator, and this is a third cooling flow path 004. The flow route of the medium in the inside of the generator 7 of the third cooling flow path 004 is as shown in Figure 6 .
[0042] The first flow guide part 6, the oil pipeline 10 and the third flow channel 63 are in an integral structure and can be integrally formed through 3D printing, so that the time and assembly process difficulty of parts are greatly reduced, and the overall weight is also reduced.
[0043] In some embodiments, the turbine rotor 5 and the generator 7 of the utility model are installed by using self-lubricating ceramic bearings, so that the lubrication system can be reduced, and the structure is more simple and reliable.
[0044] Therefore, the utility model discloses through the innovative structure, through the first cooling flow path 002 between the second sleeve 9 with the first sleeve 8 can play to the high temperature fuel gas flow path 001 of high temperature fuel gas that discharges is isolated to the heat in the generator is discharged through the second cooling flow path 003, to the generator 7 can make sustained efficient operation and not over temperature. Through the third cooling flow path 004 of the first sleeve 8 with the generator 7 shell can improve the temperature of fuel oil, further cool the generator 7, the heated fuel oil can also improve the efficiency when burning. Compared with the mode of discharging high temperature fuel gas through the side exhaust type currently, the mode of discharging fuel gas generator of the utility model can provide additional thrust for the power system, thereby improving the overall efficiency of the power device.
[0045] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the preferred embodiment has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above-mentioned technical content without departing from the scope of the present application, and any simple modification, equivalent change and modification of the above-mentioned embodiment, which does not depart from the technical scheme of the present application, are still within the scope of the present application.
Claims
1. A turbine power plant cooling structure, characterized by, The utility model relates to a turbine generator, comprising: a generator (7) whose rotating shaft is also provided with an air extraction impeller (11) for heat dissipation, the air extraction impeller (11) is installed on the heat dissipation flow channel (71) formed between the generator stator (73) and the generator rotor (72); a turbine rotor (5) for driving the generator to generate electricity.
2. The turbine power plant cooling structure of claim 1, wherein The first sleeve (8) is sleeved on the shell of the generator (7), and a fluid channel is formed between the first sleeve (8) and the shell of the generator.
3. The turbine power plant cooling structure of claim 1, wherein The air extraction impeller (11) is installed at the gas exhaust port of the heat dissipation flow channel (71).
4. The turbine power plant cooling structure of claim 2, wherein The first sleeve (8) is sleeved with a second sleeve (9), and a fluid channel substantially along the axial direction of the generator (7) is formed between the second sleeve (9) and the first sleeve (8).
5. The turbine power plant cooling structure of claim 2, wherein The heat dissipation flow channel (71) is communicated with the outside of the turbine generator through a third flow channel (63) near the turbine rotor, the third flow channel (63) is arranged on the first flow guide part (6), and the third flow channel (63) is communicated with the outside of the turbine generator through the high-temperature gas flow channel of the first flow guide part (6).
6. The turbine power plant cooling structure of claim 4, wherein The turbine rotor (5) and the generator (7) are also provided with a first flow guide part (6), the first flow guide part (6) comprises a first flow channel (61) and a second flow channel (62) arranged along the axial direction thereof, the first flow channel (61) is formed on the outer periphery of the second flow channel (62), and the second flow channel (62) is communicated with the fluid channel between the second sleeve (9) and the first sleeve (8).
7. The turbine power plant cooling structure of claim 5, wherein The inlet and outlet of the fluid channel between the first sleeve (8) and the shell of the generator are connected with a fuel pipe (10), the fuel pipe (10) is connected with the outside from the third flow channel (63).
8. The turbine power plant cooling structure of claim 5, wherein The connecting line of the generator (7) is connected with the outside from the third flow channel (63).
9. The turbine power plant cooling structure of claim 5, wherein The fourth flow channel (631) communicated with the cooling flow channel is formed in the pipe wall of the third flow channel (63), and the fourth flow channel (631) is communicated with the outside of the first flow guide part (6).
10. The turbine power plant cooling structure of claim 7, wherein The fuel pipe (10) is arranged at one end of the generator near the turbine rotor.