CN114935442B - Large-scale continuous type wind-tunnel main compressor corner structure that admits air - Google Patents
Large-scale continuous type wind-tunnel main compressor corner structure that admits air Download PDFInfo
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- CN114935442B CN114935442B CN202210865085.4A CN202210865085A CN114935442B CN 114935442 B CN114935442 B CN 114935442B CN 202210865085 A CN202210865085 A CN 202210865085A CN 114935442 B CN114935442 B CN 114935442B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses an air inlet corner structure of a main compressor of a large continuous wind tunnel, belongs to the field of wind tunnel construction, and aims to solve the problems of complex maintenance work, high labor intensity and inconvenient operation of a driving motor rotor. Comprises an air inlet connecting pipe, a corner section, a honeycomb device and a rectifying section; the air inlet connecting pipe, the corner section and the rectifying section are sequentially connected along the air flow direction, and the air inlet end of the rectifying section is provided with a honeycomb device; turning section is divided into turning section upper portion and turning section lower part along wherein the facet, shaft coupling rectification guard shield is divided into guard shield upper portion and guard shield lower part with the well facet of turning section, connection can be dismantled to turning section upper portion and turning section lower part, shaft coupling rectification guard shield links to each other with the turning section through a plurality of water conservancy diversion pieces, when electric motor rotor maintains, take over with turning section upper portion respectively with admitting air, rectification section and turning section lower part split, can dismantle motor output shaft and shaft coupling, the turning section has been overcome with driving motor compact structure, and is narrow and small in space, high in labor intensity, the problem of inconvenient operation.
Description
Technical Field
The invention belongs to the field of wind tunnel construction, and particularly relates to an air inlet corner structure of a main compressor of a large continuous wind tunnel.
Background
The wind tunnel test is widely applied to aerodynamic research, and provides necessary guarantee for the development of the fields of aviation, aerospace, railway transportation and the like.
In a continuous transonic wind tunnel, a main compressor is used as a part of a tunnel body loop, is mostly arranged behind a corner section of the wind tunnel and is used for driving air in the wind tunnel loop to flow and providing an operating pressure ratio required by establishing a wind tunnel flow field. The motors driving the compressors are mostly arranged outside the wind tunnel and are connected with the compressors through long couplers penetrating corner sections of the wind tunnel.
The improvement of main compressor homogeneity of admitting air is favorable to promoting the operating efficiency of unit, reduce wind-tunnel running cost, driving motor needs regular maintenance, need "loose core" with electric motor rotor when necessary, return the factory to maintain, at powerful driving motor rotor "loose core" in-process, need at electric motor rotor output shaft one side installation hoist and mount frock, and dismantle the shaft coupling in the turning section, make shaft coupling and electric motor rotor break away from, turning section and compressor and driving motor compact structure, the space is narrow and small, make "loose core" work of driving motor rotor loaded down with trivial details, intensity of labour is big, the operation is inconvenient, the process that electric motor rotor installed back is also complicated equally.
Disclosure of Invention
The invention aims to provide an air inlet corner structure of a main compressor of a large continuous wind tunnel, which solves the problems of complex maintenance work, high labor intensity and inconvenient operation of a driving motor rotor. The technical scheme adopted by the invention is as follows:
an air inlet corner structure of a main compressor of a large continuous wind tunnel comprises an air inlet connecting pipe, a corner section, a honeycomb device and a rectifying section; the air inlet connecting pipe, the corner section and the rectifying section are sequentially connected along the air flow direction, the connecting surfaces are sealed through sealing rubber strips, and the air inlet end of the rectifying section is provided with a honeycomb device;
the outer end of the honeycomb device is an annular outer frame, an annular inner frame is arranged in the middle of the honeycomb device, the outer frame and the inner frame are connected through rectangular grid plates and are divided into a plurality of units, honeycomb grids formed by hexagonal pipes are fully distributed in the units, and the outer frame is connected with the inner wall of the rectifying section in a matched mode;
the outer corner of the corner section is provided with a coupler rectifying shield, the coupler rectifying shield is positioned in the vertical middle of the corner section, one side of the coupler rectifying shield, which is close to the air inlet end of the corner section, is of a streamline structure, and the outer walls of the coupler rectifying shield and the corner section are provided with an integrated assembly notch which is coaxial with the inner frame;
the corner section is divided into a corner section upper part and a corner section lower part along the middle facet, the coupler rectifying shield is divided into a shield upper part and a shield lower part by the middle facet of the corner section, the axial lead of the assembly notch is on the middle facet of the corner section, the corner section upper part and the corner section lower part are detachably connected and sealed by a sealing rubber strip, the inner corner ends of the shield upper part and the corner section upper part are connected through an upper rib plate, the shield upper part and the upper rib plate are respectively connected with the corner section upper part through a plurality of flow deflectors, the shield lower part and the inner corner end of the corner section lower part are connected through a lower rib plate, the shield lower part and the lower rib plate are respectively connected with the corner section lower part through a plurality of flow deflectors, and the upper rib plate and the lower rib plate are vertically abutted.
Furthermore, the guide vanes are arranged at intervals, each guide vane comprises a pressure side, a suction side, a front edge and a tail edge, the pressure side, the front edge, the suction side and the tail edges are sequentially connected end to form the guide vane with the uniform cross section, the front edge is of an arc-shaped structure, the suction side comprises a suction side arc surface and a suction side plane which are tangent, the pressure side comprises a pressure side arc surface and a pressure side plane which are tangent, the other ends of the suction side arc surface and the pressure side arc surface are tangent with the two sides of the front edge respectively, and the pressure side plane is intersected with the other end of the suction side plane to form a tip structure of the tail edge.
Furthermore, a support is arranged at the bottom of the corner section.
Furthermore, the periphery of rectification section is equipped with a plurality of connecting seats.
Compared with the prior art, the invention has the beneficial effects that:
1. the air inlet pipe is connected, corner section and rectification section can be dismantled in proper order and connect, corner section upper portion and corner section lower part can be dismantled and connect, when electric motor rotor maintains, "loose core" or rotor repacking, with corner section upper portion respectively with the air inlet pipe, rectification section and corner section lower part split, can dismantle motor output shaft and shaft coupling, it is compact with compressor and driving motor structure to have overcome corner section, the space is narrow and small, make "loosing core" work of driving motor rotor loaded down with trivial details, high labor intensity, the inconvenient problem of operation.
2. The outer frame and the inner frame of the honeycomb device are connected through the rectangular grid plate, the rectangular grid plate divides the inner frame and the outer frame into a plurality of units, and a honeycomb grid structure formed by welding regular hexagonal thin-wall pipes is arranged in a plurality of unit cells of the honeycomb device, so that the honeycomb device has high impact resistance, structural members falling off accidentally due to special reasons can be effectively intercepted, and compressor blades are prevented from being damaged by impact of foreign objects.
3. One side of the coupler rectifying shield, which is close to the air inlet end of the corner section, is of a streamline structure, so that the separation state of airflow passing through the coupler rectifying shield can be improved, and the running efficiency of the compressor is improved.
4. The air current can produce great loss of pressure behind the turning section, leads to the required operating pressure ratio of compressor to rise, sets up the water conservancy diversion piece at the turning section and helps reducing the air current and pass through the pressure loss of turning section, improves the required operating pressure ratio of compressor.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a left side view of the present invention;
FIG. 4 is an isometric view of the lower portion of a corner segment;
FIG. 5 is a top view of the lower portion of the corner section;
FIG. 6 is a schematic view of the structure of the honeycomb;
FIG. 7 is an enlarged view at A of FIG. 6;
FIG. 8 is a cross-sectional schematic view of a coupling fairing;
fig. 9 is a cross-sectional view of a guide vane;
FIG. 10 is a schematic view of the sealing of the joint between the components;
in the figure: 1-air inlet connecting pipe, 2-corner section, 21-corner section upper part, 22-corner section lower part, 23-flow deflector, 231-suction side, 232-leading edge, 233-pressure side, 234-trailing edge, 24-support, 3-honeycomb device, 31-outer frame, 32-inner frame, 33-rectangular grid plate, 34-honeycomb grid, 4-rectifying section, 41-connecting seat, 5-coupler rectifying shield, 51-shield upper part, 52-shield lower part, 53-upper rib plate, 54-lower rib plate, 55-assembly gap and 6-sealing rubber strip.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that this description is made only by way of example and not as a limitation on the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The connection mentioned in the invention is divided into fixed connection and detachable connection, the fixed connection is non-detachable connection and comprises but is not limited to folding edge connection, rivet connection, bonding connection, welding connection and other conventional fixed connection modes, the detachable connection comprises but is not limited to bolt connection, buckle connection, pin connection, hinge connection and other conventional detachment modes, when the specific connection mode is not clearly limited, the skilled person can select at least one connection mode from the existing connection modes to realize the function according to the needs. For example: the fixed connection selects welding connection, and the detachable connection selects bolt connection.
The present invention will be described in further detail with reference to fig. 1 to 10, and the following embodiments are illustrative of the present invention, but the present invention is not limited to the following embodiments.
Example (b): as shown in fig. 1-10, an air inlet corner structure of a main compressor of a large continuous wind tunnel comprises an air inlet connecting pipe 1, a corner section 2, a honeycomb device 3 and a rectifying section 4; the air inlet connecting pipe 1, the corner section 2 and the rectifying section 4 are sequentially connected along the airflow direction, the connecting surfaces are sealed by sealing rubber strips 6, and the air inlet end of the rectifying section 4 is provided with a honeycomb device 3;
the outer end of the honeycomb device 3 is an annular outer frame 31, the middle part of the honeycomb device 3 is provided with an annular inner frame 32, the outer frame 31 and the inner frame 32 are connected by rectangular grid plates 33 and are divided into a plurality of units, honeycomb grids 34 consisting of hexagonal pipes are fully distributed in the units, and the outer frame 31 is connected with the inner wall of the rectifying section 4 in a matching way;
the outer corner of the corner section 2 is provided with a coupler rectifying shield 5, the coupler rectifying shield 5 is positioned in the vertical middle of the corner section 2, one side of the coupler rectifying shield 5, which is close to the air inlet end of the corner section 2, is of a streamline structure, the outer walls of the coupler rectifying shield 5 and the corner section 2 are provided with an integrated assembly notch 55, and the assembly notch 55 is coaxial with the inner frame 32;
the corner section 2 is divided into a corner section upper part 21 and a corner section lower part 22 along the middle facet, the coupler rectifying shield 5 is divided into a shield upper part 51 and a shield lower part 52 by the middle facet of the corner section 2, the axis of the assembly notch 55 is on the middle facet of the corner section 2, the corner section upper part 21 and the corner section lower part 22 are detachably connected and sealed by the sealing rubber strips 6, the inner corner ends of the shield upper part 51 and the corner section upper part 21 are connected through the upper rib plate 53, the shield upper part 51 and the upper rib plate 53 are respectively connected with the corner section upper part 21 through the plurality of flow deflectors 23, the shield lower part 52 and the corner section lower part 22 are connected through the lower rib plate 54, the shield lower part 52 and the lower rib plate 54 are respectively connected with the corner section lower part 22 through the plurality of flow deflectors 23, and the upper rib plate 53 and the lower rib plate 54 are abutted against each other.
The guide vanes 23 are arranged at intervals, each guide vane 23 comprises a pressure side 233, a suction side 231, a leading edge 232 and a trailing edge 234, the pressure side 233, the leading edge 232, the suction side 231 and the trailing edge 234 are sequentially connected end to form the guide vane 23 with a uniform cross section, the leading edge 232 is of an arc surface structure, the suction side 231 comprises a suction side arc surface and a suction side plane which are tangent, the pressure side 233 comprises a pressure side arc surface and a pressure side plane which are tangent, the other ends of the suction side arc surface and the pressure side arc surface are tangent with the two sides of the leading edge 232 respectively, and the pressure side plane is intersected with the other end of the suction side plane to form a tip structure of the trailing edge 234.
The bottom of the corner section 2 is provided with a seat 24.
The periphery of the rectifying section 4 is provided with a plurality of connecting seats 41.
The right-hand member of shaft coupling rectification guard shield 5 links to each other with the right-hand member of turning section 2, and the rear end of shaft coupling rectification guard shield 5 links to each other with the rear end of turning section 2, and turning section upper portion 21 and turning section lower part 22 are symmetry from top to bottom, and guard shield upper portion 51 and guard shield lower part 52 are symmetry from top to bottom, and assembly breach 55 is used for being connected with the dustcoat cooperation of shaft coupling, and the dustcoat of shaft coupling is two half tubular construction that the looks is pressed from both sides closed.
Intake and take over 1, corner section 2 and rectification section 4 can dismantle the connection in proper order, corner section upper portion 21 and corner section lower part 22 can dismantle the connection, when electric motor rotor maintains, "loose core" or rotor repacking, take over 1 with admitting air respectively corner section upper portion 21, rectification section 4 and 12 splits in corner section lower part, can dismantle motor output shaft and shaft coupling, corner section and compressor and driving motor compact structure have been overcome, the space is narrow and small, make "loosing core" work loaded down with trivial details of driving motor rotor, labor intensity is big, the problem of awkward operation.
The outer frame 31 and the inner frame 32 of the honeycomb device 3 are connected through the rectangular grid plate 33, the rectangular grid plate 33 divides the inner frame 32 and the outer frame 31 into a plurality of units, and a honeycomb grid 34 structure formed by welding regular hexagonal thin-wall pipes is arranged in the plurality of unit cells of the honeycomb device 3, so that the honeycomb device 3 has strong impact resistance, structural members falling off accidentally due to special reasons can be effectively intercepted, and the compressor blade is prevented from being damaged by impact of foreign objects.
One side of the coupler rectifying shield 5, which is close to the air inlet end of the corner section 2, is of a streamline structure, so that the separation state of airflow passing through the coupler rectifying shield 5 can be improved, and the running efficiency of the compressor is improved.
The air flow can produce great pressure loss after passing through the corner section 2, so that the required working pressure ratio of the compressor is increased, and the guide vane 23 arranged on the corner section 2 is favorable for reducing the pressure loss of the air flow passing through the corner section and improving the required working pressure ratio of the compressor.
The above embodiments are merely illustrative of the present patent and do not limit the scope of the patent, and those skilled in the art can make modifications to the parts thereof without departing from the spirit and scope of the patent.
Claims (4)
1. The utility model provides a large-scale continuous type wind-tunnel main compressor corner structure that admits air which characterized in that: comprises an air inlet connecting pipe (1), a corner section (2), a honeycombed device (3) and a rectifying section (4); the air inlet connecting pipe (1), the corner section (2) and the rectifying section (4) are sequentially connected along the air flow direction, the connecting surfaces are sealed by sealing rubber strips (6), and the air inlet end of the rectifying section (4) is provided with a honeycomb device (3);
the outer end of the honeycomb device (3) is an annular outer frame (31), the middle of the honeycomb device (3) is provided with an annular inner frame (32), the outer frame (31) and the inner frame (32) are connected through a rectangular grid plate (33) and are divided into a plurality of units, honeycomb grids (34) formed by hexagonal pipes are fully distributed in the units, and the outer frame (31) is connected with the inner wall of the rectifying section (4) in a matched mode;
a coupler rectifying shield (5) is arranged at the outer corner of the corner section (2), the coupler rectifying shield (5) is located in the vertical middle of the corner section (2), one side, close to the air inlet end of the corner section (2), of the coupler rectifying shield (5) is of a streamline structure, an integrated assembly notch (55) is formed in the outer walls of the coupler rectifying shield (5) and the corner section (2), and the assembly notch (55) is coaxial with the inner frame (32);
the corner section (2) is divided into a corner section upper part (21) and a corner section lower part (22) along the middle facet of the corner section (2), the coupler rectifying shield (5) is divided into a shield upper part (51) and a shield lower part (52) by the middle facet of the corner section (2), the axis of the assembly notch (55) is arranged on the middle facet of the corner section (2), the corner section upper part (21) and the corner section lower part (22) are detachably connected and sealed through a sealing rubber strip (6), the inner angle ends of the shield upper part (51) and the corner section upper part (21) are connected through an upper rib plate (53), the shield upper part (51) and the upper rib plate (53) are respectively connected with the corner section upper part (21) through a plurality of flow deflectors (23), the shield lower part (52) and the inner angle end of the corner section lower part (22) are connected through a lower rib plate (54), the shield lower part (52) and the lower rib plate (54) are respectively connected with the corner section lower part (22) through a plurality of flow deflectors (23), the upper rib plate (53) and the lower rib plate (54) are abutted up and down.
2. The air inlet corner structure of the main compressor of the large continuous wind tunnel according to claim 1, characterized in that: the guide vanes (23) are arranged at intervals, each guide vane (23) comprises a pressure side (233), a suction side (231), a front edge (232) and a tail edge (234), the pressure sides (233), the front edges (232), the suction sides (231) and the tail edges (234) are sequentially connected end to form the guide vanes (23) with equal cross sections, each front edge (232) is of an arc-shaped structure, each suction side (231) comprises a tangent suction side arc surface and a tangent suction side plane, each pressure side (233) comprises a tangent pressure side arc surface and a tangent pressure side plane, the other ends of the suction side arc surfaces and the other ends of the pressure side arc surfaces are tangent to the two sides of each front edge (232), and the pressure side planes are intersected with the other ends of the suction side planes to form a tip structure of the tail edges (234).
3. The air inlet corner structure of the main compressor of the large continuous wind tunnel according to claim 1, characterized in that: the bottom of the corner section (2) is provided with a support (24).
4. The air inlet corner structure of the main compressor of the large continuous wind tunnel according to any one of claims 1 to 3, wherein: the periphery of the rectifying section (4) is provided with a plurality of connecting seats (41).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210865085.4A CN114935442B (en) | 2022-07-22 | 2022-07-22 | Large-scale continuous type wind-tunnel main compressor corner structure that admits air |
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| CN202210865085.4A CN114935442B (en) | 2022-07-22 | 2022-07-22 | Large-scale continuous type wind-tunnel main compressor corner structure that admits air |
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| CN114935442A CN114935442A (en) | 2022-08-23 |
| CN114935442B true CN114935442B (en) | 2022-09-23 |
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2022
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| US10545069B1 (en) * | 2015-04-07 | 2020-01-28 | United States Of America As Represented By The Secretary Of The Air Force | Cascade wind tunnel turbulence grid |
| CN206710054U (en) * | 2017-05-25 | 2017-12-05 | 长春工程学院 | low-speed wind tunnel |
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| CN213985611U (en) * | 2020-12-29 | 2021-08-17 | 百林机电科技（苏州）有限公司 | U-shaped test wind tunnel device |
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