CN218816541U - Take splitter blade's helium nitrogen gas mixed working medium's LNG centripetal turbine - Google Patents
Take splitter blade's helium nitrogen gas mixed working medium's LNG centripetal turbine Download PDFInfo
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- CN218816541U CN218816541U CN202320187169.7U CN202320187169U CN218816541U CN 218816541 U CN218816541 U CN 218816541U CN 202320187169 U CN202320187169 U CN 202320187169U CN 218816541 U CN218816541 U CN 218816541U
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Abstract
The utility model relates to a centripetal turbine technical field, concretely relates to take reposition of redundant personnel blade's helium nitrogen gas mixed working medium's LNG centripetal turbine, including the machine casket, wheel hub, a plurality of main blades and a plurality of reposition of redundant personnel blade, wheel hub is used for supporting the blade, wheel hub controls a plurality of main blades respectively and the reposition of redundant personnel blade rotates, all install the reposition of redundant personnel blade on the passageway intermediate position that the wheel hub between every main blade's suction surface and its adjacent main blade's the pressure surface constitutes, helium nitrogen gas mixed gas is by radial inflow back, the effect of reposition of redundant personnel and water conservancy diversion has been played to the regional reposition of redundant personnel blade that easily separates at main blade pressure surface, the pressure gradient that makes former separation region step-down is more even, thereby reached and restrained the separation of helium nitrogen gas mixed working medium centripetal turbine pressure surface flow, thereby it widens high-speed high-efficiency centripetal turbine variable operating mode flow range raises the efficiency to improve the load distribution of main blade.
Description
Technical Field
The utility model relates to a centripetal turbine technical field especially relates to a take splitter blade's helium nitrogen gas mixed working medium's LNG centripetal turbine.
Background
The centripetal turbine is a device for converting the heat energy of gas into kinetic energy and mechanical energy so as to obtain low-temperature gas or output shaft work, has the advantages of simple structure, high reliability, high efficiency under the condition of small flow and the like, and can be widely applied to aviation, industrial driving and low-temperature waste heat power generation, and the peripheral speed can reach 550 m/s.
However, the existing centripetal turbine radially admits air and axially exhausts the air, the air is turned by 90 degrees in the centripetal turbine, the rotating speed of the common centripetal turbine is generally tens of thousands of turns/minute, the internal flow field is relatively complex, and for the centripetal turbine admitting air of a helium and nitrogen mixed gas type, the inlet temperature is very low and is-157 ℃, the density change of the inlet boundary condition and the outlet boundary condition is small, the enthalpy is reduced, relatively large separation flow often exists in the channel, the stability of the flow field is damaged, and the efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a take splitter blade's helium nitrogen gas mixed working medium's LNG centripetal turbine has reached and has restrained helium nitrogen gas mixed working medium centripetal turbine pressure surface flow separation, thereby improves main blade's load distribution and widens high-speed high-efficient centripetal turbine variable operating mode flow range raise the efficiency.
In order to achieve the purpose, the utility model provides a helium and nitrogen mixed working medium LNG centripetal turbine with splitter blades, which comprises a casing, a hub, a plurality of main blades and a plurality of splitter blades, wherein the casing is arranged on the other side of the hub; the main blades are respectively and fixedly connected with the hub and respectively positioned between the casing and the hub; the plurality of splitter blades are respectively fixedly connected with the hub and respectively positioned between the casing and the hub.
Wherein the leading edge beta angle of the splitter blade is 0 deg.
The height of each splitter blade is equal to that of the adjacent main blade at the same axial position, and the thickness of each splitter blade is equal to that of the adjacent main blade at the same axial position.
The radius of the tail edge of the splitter blade is 0.5 time of the thickness of the blade, and the axial chord length of the splitter blade is 0.5 time of that of the main blade.
The utility model discloses a take splitter blade's LNG centripetal turbine of helium nitrogen mixed working medium, wheel hub is used for supporting the blade, wheel hub controls a plurality ofly respectively main blade with splitter blade rotates, and long blade is main blade, and short blade is splitter blade, splitter blade axial chord length is about 50% of main blade axial chord length, every main blade's suction surface is rather than adjacent all install on the passageway intermediate position that wheel hub between main blade's the pressure surface constitutes splitter blade, helium nitrogen mixed gas is by radial inflow back main blade pressure surface easily separates the region the effect of reposition of redundant personnel and water conservancy diversion has been played to splitter blade, makes the pressure gradient of former separation region step-down more even to reached and restrained the separation of helium nitrogen mixed working medium centripetal turbine pressure surface flow, improved thereby high-speed high efficiency centripetal turbine variable operating mode flow range raises the efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a meridional cross-sectional view of the present invention.
101-hub, 102-casing, 103-main blade, 104-splitter blade.
Detailed Description
Referring to fig. 1-2, fig. 1 is a schematic view of the overall structure of the present invention, and fig. 2 is a cross-sectional view of a meridian of the present invention.
The utility model provides a take helium nitrogen gas mixed working medium's of splitter blade 104 LNG turbine entad: through the scheme, the purposes of inhibiting the helium and nitrogen mixed working medium from flowing and separating towards the pressure surface of the centripetal turbine and improving the load distribution of the main blades 103 are achieved, so that the variable working condition flow range of the high-speed high-efficiency centripetal turbine is widened and the efficiency is improved.
The casing 102 is disposed on the other side of the hub 101; the main blades 103 are respectively and fixedly connected with the hub 101 and respectively located between the casing 102 and the hub 101; the plurality of splitter blades 104 are respectively fixedly connected with the hub 101 and respectively located between the casing 102 and the hub 101, the hub 101 is used for supporting the main blade 103 and the splitter blades 104, the hub 101 respectively controls the plurality of main blades 103 and the splitter blades 104 to rotate, the long blades are the main blades 103, the short blades are the splitter blades 104, the axial chord length of the splitter blades 104 is about 50% of the axial chord length of the main blades 103, the splitter blades 104 are respectively installed at the middle positions of channels formed by the hub between the suction surface of each main blade 103 and the pressure surface of the adjacent main blade 103, and after helium and nitrogen mixed gas flows in the radial direction, the splitter blades 104 play a role in splitting and guiding in the regions where the pressure surfaces of the main blades 103 are easy to separate, so that the pressure gradient of the pressure reduction in the original separation regions is more uniform, thereby inhibiting the flow separation of the pressure surfaces of the helium and nitrogen mixed medium radial turbine, improving the load distribution of the main blades 103, thereby improving the efficiency of the working condition range of the high-speed high-efficiency radial turbine.
Secondly, the angle beta of the front edge of the splitter blade 104 is 0 degree, which is convenient to distinguish from the main blade 103 and plays roles of splitting and guiding.
Meanwhile, the height of the splitter blade 104 is equal to the height of the adjacent main blade 103 at the same axial position, and the thickness of the splitter blade is equal to the thickness of the adjacent main blade 103 at the same axial position.
In addition, the radius of the trailing edge of the splitter blade 104 is 0.5 times of the blade thickness, and the axial chord length is 0.5 times of the main blade 103.
In the LNG centripetal turbine using the helium and nitrogen mixed working medium with the splitter blade 104, the hub 101 is configured to support the blades 103 and 104, the hub 101 controls the main blades 103 and the splitter blade 104 to rotate, the long blade is the main blade 103, the short blade is the splitter blade 104, the axial chord length of the splitter blade 104 is about 50% of the axial chord length of the main blade 103, the splitter blade 104 is installed at the middle position of a channel formed by the hub between the suction surface of each main blade 103 and the pressure surface of the adjacent main blade 103, and after the helium and nitrogen mixed gas flows in the radial direction, the splitter blade 104 plays roles of splitting and guiding in the region where the pressure surfaces of the main blades 103 are easily separated, so that the pressure gradient of the original separation region is more uniform, thereby inhibiting the flow separation of the helium and nitrogen mixed working medium centripetal turbine pressure surface, improving the load distribution of the main blade 103, widening the range of the centripetal flow rate variation of the high-efficiency turbine, and improving the efficiency.
While the above disclosure describes one or more preferred embodiments of the present invention, it should be understood that there is no intent to limit the scope of the claims, and it is intended that all or a portion of the process flow of the above embodiments be practiced and equivalents thereof within the scope of the claims.
Claims (4)
1. The LNG centripetal turbine with the splitter blades for the helium and nitrogen mixed working medium comprises a casing, a hub, a plurality of main blades and a plurality of splitter blades, wherein the casing is arranged on the other side of the hub; the main blades are respectively and fixedly connected with the hub and respectively positioned between the casing and the hub; the plurality of splitter blades are respectively fixedly connected with the hub and respectively positioned between the casing and the hub.
2. The LNG centripetal turbine with the splitter vane and the helium-nitrogen mixed working medium as claimed in claim 1,
the beta angle of the front edge of the splitter blade is 0 degree.
3. The LNG centripetal turbine with the splitter vane and the helium-nitrogen mixed working medium as claimed in claim 2,
the height of each splitter blade is equal to that of the adjacent main blade at the same axial position, and the thickness of each splitter blade is equal to that of the adjacent main blade at the same axial position.
4. An LNG centripetal turbine with a helium-nitrogen mixed working medium and splitter vanes as claimed in claim 3,
the radius of the tail edge of the splitter blade is 0.5 times of the thickness of the blade, and the axial chord length of the splitter blade is 0.5 times of that of the main blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320187169.7U CN218816541U (en) | 2023-02-12 | 2023-02-12 | Take splitter blade's helium nitrogen gas mixed working medium's LNG centripetal turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320187169.7U CN218816541U (en) | 2023-02-12 | 2023-02-12 | Take splitter blade's helium nitrogen gas mixed working medium's LNG centripetal turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218816541U true CN218816541U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320187169.7U Active CN218816541U (en) | 2023-02-12 | 2023-02-12 | Take splitter blade's helium nitrogen gas mixed working medium's LNG centripetal turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218816541U (en) |
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2023
- 2023-02-12 CN CN202320187169.7U patent/CN218816541U/en active Active
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