CN106640418B - A kind of change Mach number rotating mechanism based on half circular journal bearing - Google Patents
A kind of change Mach number rotating mechanism based on half circular journal bearing Download PDFInfo
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- CN106640418B CN106640418B CN201611192394.0A CN201611192394A CN106640418B CN 106640418 B CN106640418 B CN 106640418B CN 201611192394 A CN201611192394 A CN 201611192394A CN 106640418 B CN106640418 B CN 106640418B
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- side wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/06—Varying effective area of jet pipe or nozzle
- F02K1/15—Control or regulation
-
- 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
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The present invention relates to a kind of change Mach number rotating mechanism based on half circular journal bearing, the mechanism includes left side wall 1, mo(u)ld top half face mechanism 2, mo(u)ld bottom half face mechanism 3, upper backup pad 4, lower supporting plate 5, upper right semi-circle bearing 6, upper left semicircle bearing 7, lower right semi-circle bearing 8, lower left semicircle bearing 9, right side wall 10.The rotating mechanism that the present invention designs is for exporting the free jet jet pipe for open type, its semicircle axle ear design effectively ensure that rigid type face Pivot axle exports sideline for nozzle contour, so as to be effectively ensured during Mach number regulation, the unifying datum of the sectional area of nozzle exit and its venturi control height, arc guide rail pattern is used using fixed face drive end, the defects of half circular journal bearing can not lock effectively is compensate for, makes drive mechanism regulation effectively, fast.
Description
Technical field
The invention belongs to a kind of wind tunnel test or the testing equipment designing technique of aero-engine HIGHER ALTITUDE TEST FACILITY aerodynamic testing, tool
Body is related to a kind of change Mach number rotating mechanism based on half circular journal bearing.
Background technology
The outlet of its supersonic nozzle of traditional closed type supersonic jet wind-tunnel is straight with experimental section, in other words, supersonic speed
Nozzle exit need to be tangent with experimental section keep level, to avoid the secondary shock wave of outside nozzle.For closed type rigidity jet pipe
Since it is desired that keeping outlet horizontal, therefore set typically near nozzle exit around center of rotation, pass through concave-convex type circular arc and experiment
Duan Jinhang is in smoothing junction.
And for open type free jet altitude simulation test, open type nozzle exit is broad experimental cabin space, i.e.,
Nozzle exit section is glitch-free aerodynamics, that is to say, that can not be projected into jet pipe around the pivot of nozzle exit and go out
Include the left and right side of nozzle exit outside mouth section, in order to avoid influence flow expansion and experiment core space flow quality.
In order to solve this problem, traditional open type flexible joint nozzle is directly to fix nozzle exit, and pivot is horizontal
Reach, its design principle is to ensure that flexible board plays turning point slope straight line and exit tangent joining, to ensure the company in air-driven type face
Continuous property.If using design of the pivot near nozzle exit, the endpoint location in nozzle exit type face, it is inevitable because
Type face is rotated and changed, i.e. nozzle exit highly changes, it is well known that the control of jet pipe Mach number is sprayed by adjusting
The area ratio of pipe venturi and nozzle exit is realized, if both change during experiment, although can also obtain
To a Mach number, but the Mach number and target Mach number control it is accurate it is difficult to ensure that, meanwhile, it is horizontal according to nozzle exit
The fixed face of state design, after exit angle change, relatively large deviation will occur for the gentle flow angle of its flow quality.That is
Using scheme of the pivot near nozzle exit, it is necessary to sacrifice certain degree of regulation and flow field quality ignores certain tune
Save error.For the supersonic speed variable Mach number nozzle in rigid type face, the engineering design of rigid jet pipe rotating mechanism is very crucial,
Pivot must be strictly arranged at the end face sideline in nozzle exit type face.Such as jet pipe is designed by the way of full circle axle to go out
The pivot of mouth end points, a part certainly will be protruded in nozzle exit section side wall, this is that aerodynamics free wxpansion does not allow
's.
The content of the invention
The technical problem to be solved in the present invention：
Simple, reliable open type rigidity jet pipe Mach number continuously adjustable mechanism is designed, while passes through fixed face end
Hold half circular shaft Rotation Design, it is ensured that open type nozzle exit area is constant and Mach number degree of regulation, when jet pipe Mach number connects
During continuous regulation, realize that nozzle exit air velocity distribution is uniform, regular.Improve its service efficiency and practicality.
Technical scheme：
A kind of change Mach number rotating mechanism based on half circular journal bearing, including left side wall (1), mo(u)ld top half face mechanism (2), mo(u)ld bottom half face
Mechanism (3), upper backup pad (4), lower supporting plate (5), upper right semi-circle bearing (6), upper left semicircle bearing (7), lower right semi-circle bearing
(8), lower left semicircle bearing (9), right side wall (10), upper backup pad (4) are located above mo(u)ld top half face mechanism (2), left side wall (1) and the right side
Between side wall (10), lower supporting plate (5) is located at below mo(u)ld bottom half face mechanism (4), between left side wall (1) and right side wall (10),
The mo(u)ld top half face mechanism (2) includes mo(u)ld top half panel (2-1), upper bogie (2-2), upper sealing support plate (2-3), upper right
Half circular shaft ear (2-4), upper left semicircle axle ear (2-5)；The mo(u)ld bottom half face mechanism (3) includes mo(u)ld bottom half panel (3-1, lower bogie (3-
2), lower sealing support plate (3-3), lower right semi-circle axle ear (3-4), lower left semicircle axle ear (3-5)；
Mo(u)ld top half panel (2-1) and upper bogie (2-2), upper sealing support plate (2-3), upper right half in mo(u)ld top half face mechanism (2)
Circular shaft ear (2-4), upper left semicircle axle ear (2-5) are to be fixedly connected, and the upper right semi-circle axle ear (2-4) passes through upper right semi-circle axle
Hold (6) to be connected in the upper right rotating drum of right side wall (10), rotary shaft is O of mo(u)ld top half panel (2-1) exit end face close to inner chamber
Axle, right side wall (10) play axial limiting to mo(u)ld top half panel (2-1), and the upper left semicircle axle ear (2-5) passes through upper left semicircle
Bearing (7) is connected in the upper left rotating drum of left side wall (1), and rotary shaft is O of mo(u)ld top half panel (2-1) exit end face close to inner chamber
Axle, left side wall (1) play axial limiting to mo(u)ld top half panel (2-1)；
The mo(u)ld bottom half panel (3-1) of mo(u)ld bottom half face mechanism (3) and lower bogie (3-2), lower sealing support plate (3-3), lower right semi-circle
Axle ear (3-4), lower left semicircle axle ear (3-5) are to be fixedly connected, and the lower right semi-circle axle ear (3-4) passes through lower right semi-circle bearing
(6) it is connected in the bottom right rotating drum of right side wall (10), rotary shaft is N axle of mo(u)ld bottom half panel (3-1) exit end face close to inner chamber,
Right side wall (10) plays axial limiting to mo(u)ld bottom half panel (3-1), and the lower left semicircle axle ear (3-5) passes through lower left semicircle bearing
(7) it is connected in the lower-left rotating drum of left side wall (1), rotary shaft is N axle of mo(u)ld bottom half panel (3-1) exit end face close to inner chamber,
Left side wall (1) plays axial limiting to mo(u)ld bottom half panel (3-1)；
Upper backup pad (4) is arc surface in the end face of air inlet extreme direction, and the arc surface rotary shaft is O axles, upper sealing branch
The arc surface rigid contact of plate (2-3) and upper backup pad (4) axially plays position-limiting action in jet pipe, and the sealing support plate (2-3) can
Slided along the arc surface of the upper backup pad (4)；
Lower supporting plate (5) is arc surface in the end face of air inlet extreme direction, and the arc surface rotary shaft is N axles, lower sealing branch
The arc surface rigid contact of plate (3-3) and lower supporting plate (5) axially plays position-limiting action in jet pipe, and the sealing support plate (3-3) can
Slided along the arc surface of the lower supporting plate (5).
A kind of described change Mach number rotating mechanism based on half circular journal bearing, the mo(u)ld top half face mechanism (2) pass through upper driving
Frame (2-2) is fixedly connected with upper drive mechanism (11), and mo(u)ld bottom half face mechanism (3) passes through lower bogie (3-2) and lower drive mechanism
(12) it is fixedly connected.
Beneficial effects of the present invention：
Advantage：
A) design of half circular shaft solves open type rigidity jet pipe Mach number and continuously adjusted to the limitation of its exit flow quality
Influence.
B) fixed face drive end uses arc guide rail pattern, effectively compensate for the defects of half circular journal bearing can not lock.
Effect：
A kind of change Mach number rotating mechanism reasonable design method based on half circular journal bearing.The circular shaft of rigid type face end half is set
Meter, it is ensured that open type nozzle exit area is constant, and realizes that nozzle exit air velocity distribution is uniform, regular.In outside nozzle energy
An obvious even test region is accessed, meets test requirements document, is worked well in HIGHER ALTITUDE TEST FACILITY blowing test.
Brief description of the drawings
Fig. 1 is that fragmentary three-dimensional view is installed by mechanism；
Fig. 2 is upper and lower rigid type face mechanism front view；
Fig. 3 is the change Mach number rotating mechanism schematic diagram based on half circular journal bearing.
Embodiment
The workflow of the jet pipe is：Limited by the both forward and reverse directions for sealing support plate and supporting plate, half circular shaft ear and side wall
Behind position, drive mechanism driving rotation support plate in type face is moved；Whole Xing Mian mechanisms are driven in half circular journal bearing, supporting plate circular arc
Being rotated along center of rotation O under effect；So as to realize that the venturi of Xing Mian mechanisms is highly adjusted, type face outlet port keeps O axles
It is constant, and then realize the accurate adjustment of nozzle exit Mach number.
Claims (2)
1. a kind of change Mach number rotating mechanism based on half circular journal bearing, it is characterised in that including left side wall (1), mo(u)ld top half face mechanism
(2), mo(u)ld bottom half face mechanism (3), upper backup pad (4), lower supporting plate (5), upper right semi-circle bearing (6), upper left semicircle bearing (7), under
Right semi-circle bearing (8), lower left semicircle bearing (9), right side wall (10), upper backup pad (4) are located above mo(u)ld top half face mechanism (2), left
Between side wall (1) and right side wall (10), lower supporting plate (5) is located at below mo(u)ld bottom half face mechanism (3), left side wall (1) and right side wall
(10) between,
The mo(u)ld top half face mechanism (2) includes mo(u)ld top half panel (2-1), upper bogie (2-2), upper sealing support plate (2-3), upper right semi-circle
Axle ear (2-4), upper left semicircle axle ear (2-5)；The mo(u)ld bottom half face mechanism (3) include mo(u)ld bottom half panel (3-1, lower bogie (3-2),
Lower sealing support plate (3-3), lower right semi-circle axle ear (3-4), lower left semicircle axle ear (3-5)；
Mo(u)ld top half panel (2-1) and upper bogie (2-2), upper sealing support plate (2-3), upper right semi-circle axle in mo(u)ld top half face mechanism (2)
Ear (2-4), upper left semicircle axle ear (2-5) are to be fixedly connected, and the upper right semi-circle axle ear (2-4) passes through upper right semi-circle bearing
(6) it is connected in the upper right rotating drum of right side wall (10), rotary shaft is O axle of mo(u)ld top half panel (2-1) exit end face close to inner chamber,
Right side wall (10) plays axial limiting to mo(u)ld top half panel (2-1), and the upper left semicircle axle ear (2-5) passes through upper left semicircle bearing
(7) it is connected in the upper left rotating drum of left side wall (1), rotary shaft is O axle of mo(u)ld top half panel (2-1) exit end face close to inner chamber,
Left side wall (1) plays axial limiting to mo(u)ld top half panel (2-1)；
The mo(u)ld bottom half panel (3-1) of mo(u)ld bottom half face mechanism (3) and lower bogie (3-2), lower sealing support plate (3-3), lower right semi-circle axle ear
(3-4), lower left semicircle axle ear (3-5) are to be fixedly connected, and the lower right semi-circle axle ear (3-4) passes through lower right semi-circle bearing (6)
It is connected in the bottom right rotating drum of right side wall (10), rotary shaft is N axle of mo(u)ld bottom half panel (3-1) exit end face close to inner chamber, right
Side wall (10) plays axial limiting to mo(u)ld bottom half panel (3-1), and the lower left semicircle axle ear (3-5) passes through lower left semicircle bearing
(7) it is connected in the lower-left rotating drum of left side wall (1), rotary shaft is N axle of mo(u)ld bottom half panel (3-1) exit end face close to inner chamber,
Left side wall (1) plays axial limiting to mo(u)ld bottom half panel (3-1)；
Upper backup pad (4) is arc surface in the end face of air inlet extreme direction, and the arc surface rotary shaft is O axles, upper sealing support plate (2-
3) position-limiting action is axially played in jet pipe with the arc surface rigid contact of upper backup pad (4), the sealing support plate (2-3) can be along described
The arc surface of upper backup pad (4) slides；
Lower supporting plate (5) is arc surface in the end face of air inlet extreme direction, and the arc surface rotary shaft is N axles, lower sealing support plate (3-
3) position-limiting action is axially played in jet pipe with the arc surface rigid contact of lower supporting plate (5), the sealing support plate (3-3) can be along described
The arc surface of lower supporting plate (5) slides.
2. a kind of change Mach number rotating mechanism based on half circular journal bearing according to claim 1, it is characterised in that on described
Xing Mian mechanisms (2) are fixedly connected by upper bogie (2-2) with upper drive mechanism (11), and mo(u)ld bottom half face mechanism (3) passes through lower driving
Frame (3-2) is fixedly connected with lower drive mechanism (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611192394.0A CN106640418B (en) | 2016-12-21 | 2016-12-21 | A kind of change Mach number rotating mechanism based on half circular journal bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611192394.0A CN106640418B (en) | 2016-12-21 | 2016-12-21 | A kind of change Mach number rotating mechanism based on half circular journal bearing |
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| Publication Number | Publication Date |
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| CN106640418A CN106640418A (en) | 2017-05-10 |
| CN106640418B true CN106640418B (en) | 2018-04-03 |
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| CN201611192394.0A Active CN106640418B (en) | 2016-12-21 | 2016-12-21 | A kind of change Mach number rotating mechanism based on half circular journal bearing |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168831A (en) * | 2017-12-15 | 2018-06-15 | 中国航空工业集团公司沈阳空气动力研究所 | A kind of continuous change Mach number experiment supersonic wind tunnel |
| CN108362465B (en) * | 2017-12-29 | 2021-11-09 | 中国空气动力研究与发展中心设备设计及测试技术研究所 | Continuous transonic wind tunnel semi-flexible wall surface spray pipe throat block vertical space type electric driving device |
| CN108412635B (en) * | 2018-02-07 | 2020-06-12 | 大连交通大学 | Binary direct-injection oblique shock wave thrust vectoring nozzle |
| CN113049257A (en) * | 2021-03-23 | 2021-06-29 | 中国空气动力研究与发展中心空天技术研究所 | Sound velocity spray pipe with adjustable outlet height |
| CN113295369B (en) * | 2021-05-17 | 2022-08-23 | 中国人民解放军国防科技大学 | Jet pipe section structure and method for realizing continuous variable Mach number wind tunnel |
| CN114109644A (en) * | 2021-10-09 | 2022-03-01 | 中国航发贵阳发动机设计研究所 | Method for adjusting area of exit throat of special-shaped fixed spray pipe of aircraft engine |
| CN114414197B (en) * | 2022-03-28 | 2022-09-09 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Variable Mach number spray pipe of flexible wallboard of prebending |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07306120A (en) * | 1994-05-11 | 1995-11-21 | Kobe Steel Ltd | Variable mach-number nozzle and tester for ram-jet engine using variable mach-number nozzle |
| US6948306B1 (en) * | 2002-12-24 | 2005-09-27 | The United States Of America As Represented By The Secretary Of The Navy | Apparatus and method of using supersonic combustion heater for hypersonic materials and propulsion testing |
| CN102434318B (en) * | 2010-09-29 | 2014-08-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Hydraulic equipment for debugging of engine jet pipe |
| CN102022225B (en) * | 2010-12-30 | 2013-03-27 | 北京航空航天大学 | Test device for hydrogen-rich/oxygen-rich gas multinozzle gas-gas injector |
| US9121369B2 (en) * | 2011-08-19 | 2015-09-01 | Gulfstream Aerospace Corporation | Nozzle arrangement and method of making the same |
| CN104791134B (en) * | 2015-05-08 | 2016-07-06 | 北京理工大学 | A kind of replaceable Secondary Flow hits the flow field visual device of nozzle mutually |
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Address after: 610500 Xindu Xuefu Road, Xindu District, Chengdu, Sichuan Patentee after: AECC SICHUAN GAS TURBINE Research Institute Address before: 621703 P.O. Box 305, Mianyang City, Sichuan Province Patentee before: CHINA GAS TURBINE EST |
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