CN110160731A - Adjustable clearance device for flutter test - Google Patents
Adjustable clearance device for flutter test Download PDFInfo
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- CN110160731A CN110160731A CN201810899719.1A CN201810899719A CN110160731A CN 110160731 A CN110160731 A CN 110160731A CN 201810899719 A CN201810899719 A CN 201810899719A CN 110160731 A CN110160731 A CN 110160731A
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- fixation clamp
- adjustment ring
- thimble
- gap adjustment
- linkage section
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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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- 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
- G01M9/08—Aerodynamic models
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a kind of adjustable clearance devices for flutter test, it includes pedestal, rotational stiffness spring part, thimble, fixation clamp, first fastening assembly, gap adjustment ring and the second fastening assembly, thimble is fixed on rotational stiffness spring part, the open end of fixation clamp is for accommodating rudderpost, first linkage section of thimble is located in the receiving hole of fixation clamp, first fastening assembly is used to fixation clamp being fixed at rudderpost, gap adjustment ring is set on the first linkage section of thimble and is located in the receiving hole of fixation clamp, second fastening assembly is set on the first linkage section of thimble, second fastening assembly is for fastening gap adjustment ring to adjust the height of gap adjustment ring, adjustable clearance device is by adjusting the gap on rotary freedom of the height of gap adjustment ring to adjust rudderpost.It applies the technical scheme of the present invention, to solve the technical issues of can not obtaining affecting laws of the different gap size to buffet characteristic in the prior art.
Description
Technical field
The present invention relates to backlash nonlinearity studying technological domain more particularly to a kind of adjustable clearance dresses for flutter test
It sets.
Background technique
Rudder face is missile-borne important control surface, and rudder face with steering engine when connecting, it will usually cause rudder face free in rotation
There is biggish gap on degree.Due to the presence in gap, it may cause and generate limit cycles oscillations during flight test, even
Diverging.When flutter test, the wing/rudder can be obtained with the changing rule of bending stiffness and torsion stiffness, clarify design parameter pair
The influence of buffet characteristic.Since there is gaps for the true wing/rudder system, gap should be obtained by flutter test to structure
The influence of buffet characteristic, affecting laws of the clarification gap to limit cycle and flutter.However, in the prior art, can not obtain not
With gap size to the affecting laws of buffet characteristic.
Summary of the invention
The present invention provides a kind of adjustable clearance devices for flutter test, and being able to solve can not obtain in the prior art
The technical issues of different gap size is to the affecting laws of buffet characteristic.
The present invention provides a kind of adjustable clearance devices for flutter test, and adjustable clearance device includes: pedestal；Rotation
Rigid spring part, rotational stiffness spring part are fixedly installed on the base；Thimble, thimble are fixed at rotational stiffness spring part
On, thimble includes the first positioning ring and the first linkage section, and the diameter of the first positioning ring is greater than the diameter of the first linkage section；Fixing card
Son, fixation clamp have open end and connecting pin, and the open end of fixation clamp is for accommodating rudderpost, the connecting pin tool of fixation clamp
There is receiving hole, the first linkage section of thimble is located in receiving hole, and the first positioning ring is for determining the connecting pin of fixation clamp
Position, the axis direction of rudderpost are perpendicular with the length direction of the axis direction of thimble and fixation clamp respectively；First fastening group
The open end of fixation clamp is arranged in part, the first fastening assembly, and the first fastening assembly is used to fixation clamp being fixed at rudder
On axis；Gap adjustment ring, gap adjustment ring are set on the first linkage section of thimble and are located in the receiving hole of fixation clamp,
The connecting pin of gap adjustment ring and fixation clamp is clearance fit；Second fastening assembly, the second fastening assembly are set in the of thimble
On one linkage section, gap adjustment ring is arranged between the first positioning ring and the second fastening assembly, and the second fastening assembly is for fastening
Gap adjustment ring is to adjust the height of gap adjustment ring, and adjustable clearance device is by adjusting the height of gap adjustment ring to adjust rudder
Gap on the rotary freedom of axis.
Further, the first linkage section of thimble has external screw thread, and the second fastening assembly includes the first nut, the first nut
It is threadedly engaged with the first linkage section, adjustable clearance device is by tightening the first nut to adjust the height of gap adjustment ring.
Further, the gap delta on the rotary freedom of rudderpost can basis To obtain, wherein h is the height of gap adjustment ring, h0For the height at the connecting pin of fixation clamp, between Δ l is
The deflection of the short transverse of gap adjustment ring, l are the distance of the axis direction of the centre distance rudderpost of receiving hole, and M is the first spiral shell
Female screw-down torque, k are to turn round to draw coefficient, and d is the screw thread engineering diameter of the first linkage section, P0For the screwing force of the first nut, A is
The sectional area of gap adjustment ring, E are the elasticity modulus of gap adjustment ring.
Further, rotational stiffness spring part has the first connecting hole being connected and first positioning hole, thimble further include
Second positioning ring and the second linkage section, the second positioning ring are matched with first positioning hole, and the setting of the second linkage section is in the first connection
In hole, the second linkage section has external screw thread, and adjustable clearance device further includes the second nut, the second nut and the second linkage section screw thread
Cooperation is thimble to be fixed on rotational stiffness spring part.
Further, the receiving hole of the first connecting hole and fixation clamp is coaxial arrangement.
Further, fixation clamp includes being fixedly connected with section, the first claw and the second claw, the first claw and the second claw
Be arranged in parallel and be fixedly connected with section and connect, the first claw and the second claw form open end, and receiving hole setting connects fixed
It connects in section.
Further, the first fastening assembly includes fastening screw and third nut, and fastening screw is each passed through the first claw
It matches with the second claw and with third nut fixation clamp to be fixed on rudderpost.
Further, the sectional area of gap adjustment ring is 1 to 2 times of the threaded area of the first linkage section of thimble.
Further, adjustable clearance device further includes the first gasket, and the setting of the first gasket is adjusted in the first nut and gap
Between ring.
Further, adjustable clearance device further includes the second gasket and third gasket, and the second gasket is arranged in the second nut
Between rotational stiffness spring part, third gasket is arranged between third nut and the first claw.
It applies the technical scheme of the present invention, fixation clamp is mounted on rudderpost by the first fastening assembly, thimble is fixed
On rotational stiffness spring leaf, gap adjusts ring set on thimble and passes through the accommodating chamber of fixation clamp, passes through the second fastening group
Part tightens gap adjustment ring, this kind of structure just constitutes rudderpost rotation (torsion) freedom degree interstitial structure.In this way,
Height by changing gap adjustment ring is the purpose that can reach control flaps axis and rotate (torsion) freedom degree gap.Due to rudder face with
Rudderpost is integrated design, therefore the height by changing gap adjustment ring also can reach between controlling rudder face rotation (torsion) freedom degree
The purpose of gap.Using technical solution of the present invention, controllable structure interval can be obtained, realizes rotation during flutter test
The controllability in (torsion) freedom degree gap, has broad application prospects in terms of Nonlinear Flutter test.
Detailed description of the invention
Included attached drawing is used to provide to be further understood from the embodiment of the present invention, and which constitute one of specification
Point, for illustrating the embodiment of the present invention, and come together to illustrate the principle of the present invention with verbal description.It should be evident that below
Attached drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying creation
Property labour under the premise of, be also possible to obtain other drawings based on these drawings.
Fig. 1 shows the section view of the adjustable clearance device for flutter test provided according to a particular embodiment of the invention
Figure；
Fig. 2 shows the partial enlarged views at the A for the adjustable clearance device of flutter test provided in Fig. 1；
Fig. 3 shows the main view of the adjustable clearance device for flutter test provided in Fig. 1；
Fig. 4 shows the top view of the adjustable clearance device for flutter test provided in Fig. 1；
Fig. 5 shows the size of the adjustable clearance device for flutter test provided according to a particular embodiment of the invention
Schematic diagram.
Wherein, the above drawings include the following reference numerals:
10, pedestal；20, rotational stiffness spring part；21, the first connecting hole；22, first positioning hole；30, thimble；31, first
Positioning ring；32, the first linkage section；33, the second positioning ring；34, the second linkage section；40, fixation clamp；41, it is fixedly connected with section；
42, the first claw；43, the second claw；50, the first fastening assembly；51, fastening screw；52, third nut；60, gap adjusts
Ring；70, the first nut；80, the second nut；90, the first gasket；100, the second gasket；110, third gasket；200, rudderpost.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is right below
The description only actually of at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or use
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, shall fall within the protection scope of the present invention.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each portion shown in attached drawing
The size divided not is to draw according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation
A part of book.In shown here and discussion all examples, any occurrence should be construed as merely illustratively, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar label
Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It does not need that it is further discussed in figure.
As shown in Figures 1 to 5, a kind of adjustable clearance for flutter test is provided according to a particular embodiment of the invention
Device, the adjustable clearance device include pedestal 10, rotational stiffness spring part 20, thimble 30, fixation clamp 40, the first fastening assembly
50, gap adjustment ring 60 and the second fastening assembly, rotational stiffness spring part 20 are fixed on pedestal 10, and the fixation of thimble 30 is set
Set on rotational stiffness spring part 20, thimble 30 include the first positioning ring 31 and the first linkage section 32, the first positioning ring 31 it is straight
Diameter is greater than the diameter of the first linkage section 32, and fixation clamp 40 has open end and connecting pin, and the open end of fixation clamp 40 is used for
Rudderpost is accommodated, the connecting pin of fixation clamp 40 has receiving hole, and the first linkage section 32 of thimble 30 is located in receiving hole, and first is fixed
Position ring 31 for being positioned to the connecting pin of fixation clamp 40, the axis direction of rudderpost respectively with the axis direction of thimble 30 with
And the length direction of fixation clamp 40 is perpendicular, the open end of fixation clamp 40, the first fastening is arranged in the first fastening assembly 50
Component 50 is used to fixation clamp 40 being fixed at rudderpost, and gap adjustment ring 60 is set in the first linkage section 32 of thimble 30
Upper and be located in the receiving hole of fixation clamp 40, the connecting pin of gap adjustment ring 60 and fixation clamp 40 is clearance fit, second
Fastening assembly is set on the first linkage section 32 of thimble 30, and the setting of gap adjustment ring 60 is in the first positioning ring 31 and the second fastening
Between component, the second fastening assembly adjusts the height of gap adjustment ring 60, adjustable clearance dress for fastening gap adjustment ring 60
Set the gap on rotary freedom of the height by adjusting gap adjustment ring 60 to adjust rudderpost 200.
Using such configuration mode, fixation clamp is mounted on rudderpost by the first fastening assembly, thimble is fixed on rotation
Turn rigid spring on piece, gap adjusts ring set on thimble and passes through the accommodating chamber of fixation clamp, will by the second fastening assembly
Gap adjustment ring is tightened, this kind of structure just constitutes rudderpost rotation (torsion) freedom degree interstitial structure.In this way, pass through
The height for changing gap adjustment ring is that can reach the purpose in control flaps axis rotation (torsion) freedom degree gap.Due to rudder face and rudderpost
It is integrated design, therefore the height by changing gap adjustment ring also can reach control rudder face and rotate (torsion) freedom degree gap
Purpose.Using technical solution of the present invention, controllable structure interval can be obtained, realizes rotation (torsion) during flutter test
The controllability in freedom degree gap has broad application prospects in terms of Nonlinear Flutter test.Adjustable clearance of the invention simultaneously
Device can be used for the design of other interstitial structures.
Further, in the present invention, consider structure complexity, the first linkage section 32 of thimble 30 can be configured to have
External screw thread, the second fastening assembly include the first nut 70, and the first nut 70 is threadedly engaged with the first linkage section 32, adjustable clearance dress
It sets by tightening the first nut 70 to adjust the height of gap adjustment ring 60.Using such configuration mode, pass through the first nut 70
Apply different active forces to gap adjustment ring 60 to change the height of gap adjustment ring 60, (is turned round so as to realize rotation
Turn) adjustable clearance of freedom degree.When carrying out flutter research, according to different gap states, different gap state can be obtained
Under structural response, obtain gap to the affecting laws of buffet characteristic and properties of limit cycles, improve the understanding to non-linear gap.
Specifically, in the present invention, as shown in Figure 2 and Figure 5, the gap delta on the rotary freedom of rudderpost 200 can basisTo obtain, wherein h is the height of gap adjustment ring 60, h0It is solid
Determine the height at 40 connecting pin of clamp, Δ l is the deflection of the short transverse of gap adjustment ring 60, and l is in receiving hole
The distance of axis direction of the heart apart from rudderpost, M are the screw-down torque of the first nut 70, and k is to turn round to draw coefficient, and d is the first linkage section
32 screw thread engineering diameter, P0For the screwing force of the first nut 70, A is the sectional area of gap adjustment ring 60, and E is gap adjustment ring
60 elasticity modulus.
Using such configuration mode, different active forces is applied to gap adjustment ring 60 by the first nut 70, it can toning
The height of internode gap adjustment ring 60 can obtain the gap delta on the rotary freedom of rudderpost 200 according to above-mentioned formula.Therefore,
It can be realized the backlash nonlinearity of rotary freedom by using the device, realize rotation (torsion) freedom degree backlash nonlinearity pair
The affecting laws of rudder face buffet characteristic are studied.
It further, in the present invention, can in order to realize being fixedly connected between thimble 30 and rotational stiffness spring part 20
It configures rotational stiffness spring part 20 to the first connecting hole 21 for being connected and first positioning hole 22, thimble 30 further includes the
Two positioning rings 33 and the second linkage section 34, the second positioning ring 33 are matched with first positioning hole 22, and the setting of the second linkage section 34 exists
In first connecting hole 21, the second linkage section 34 has external screw thread, and adjustable clearance device further includes the second nut 80, the second nut 80
It is threadedly engaged with the second linkage section 34 thimble 30 to be fixed on rotational stiffness spring part 20.
As a specific embodiment of the invention, one end of rotational stiffness spring part 20 is fixed at base by screw
On seat 10, the first connecting hole 21 and first positioning hole 22 are offered on the other end of rotational stiffness spring part 20, are carrying out thimble
When 30 installation, matched by the second positioning ring 33 of thimble 30 with the first positioning hole 22 of rotational stiffness spring part 20, the
Two linkage sections 34 are arranged in the first connecting hole 21, and the second nut 80 and the second linkage section 34 are threadedly engaged so that thimble 30 is fixed
It is arranged on rotational stiffness spring part 20.
Further, in the present invention, in order to improve adjustable clearance device carry out flutter test precision, can be by first
The receiving hole of connecting hole 21 and fixation clamp 40 is configured to be coaxially disposed.
In addition, as a specific embodiment of the invention, as shown in Figure 1, fixation clamp 40 include be fixedly connected section 41,
First claw 42 and the second claw 43, the first claw 42 and the second claw 43 be arranged in parallel and be fixedly connected with section 41 and connect,
First claw 42 and the second claw 43 form open end, and receiving hole is arranged on being fixedly connected with section 41.
Using such configuration mode, in the installation being fixed between clamp 40 and rudderpost 200, fixation clamp 40 passes through
First claw 42 and the second claw 43 are formed by the outside that open end is set in rudderpost 200, then pass through the first fastening assembly
50 are fixed being fastened and fixed between clamp 40 and rudderpost 200.Specifically, in the present invention, the first fastening assembly 50 includes
Fastening screw 51 and third nut 52, fastening screw 51 be each passed through the first claw 42 and the second claw 43 and with third nut 52
It matches so that fixation clamp 40 to be fixed on rudderpost.
Further, in the present invention, gap is adjusted for convenience, the sectional area of gap adjustment ring 60 can be configured to push up
1 to 2 times of the threaded area of first linkage section 32 of needle 30.As a specific embodiment of the invention, gap adjustment ring 60
It is clearance fit between circular tube shaped, and the receiving hole of fixation clamp 40, the diameter of the receiving hole of fixation clamp is than gap tune
The outer diameter of the domain is bigger, and the sectional area of gap adjustment ring 60 is 1 to 2 times of the threaded area of the first linkage section 32 of thimble 30.
In the present invention, since gap adjustment ring 60 has inner hole, and the outside of thimble 30 is set in by inner hole, therefore described herein
Gap adjustment ring 60 sectional area be refers to the gap adjustment ring 60 annular cross section product.
In the present invention, in order to improve the degree of regulation of adjustable clearance device, adjustable clearance device can be configured to also to wrap
The first gasket 90, the second gasket 100 and third gasket 110 are included, the first gasket 90 is arranged in the first nut 70 and gap adjustment ring
Between 60, the second gasket 100 is arranged between the second nut 80 and rotational stiffness spring part 20, and the setting of third gasket 110 is the
Between three nuts 52 and the first claw 42.
Further understand to have to the present invention, below with reference to Fig. 1 to Fig. 5 to it is of the invention for flutter test can
The course of work of gap regulating device is described in detail.
As shown in Figures 1 to 5, as a specific embodiment of the invention, adjustable clearance device includes pedestal 10, rotation
Rigid spring part 20, thimble 30, fixation clamp 40, the first fastening assembly 50, gap adjustment ring 60, the first nut 70, the second spiral shell
Female 80, first gasket 90, the second gasket 100 and third gasket 110, fixation clamp 40 include being fixedly connected with section 41, the first claw
42 and second claw 43, the first claw 42 and the second claw 43 be arranged in parallel and be fixedly connected with section 41 and connect, the first claw
42 and second claw 43 formed open end, receiving hole be arranged on being fixedly connected with section 41.
When work, fixation clamp 40 is formed by open end and is set in by the first claw 42 and the second claw 43 first
The outside of rudderpost 200, then fastening screw 51 is each passed through the first claw 42 and the second claw 43 and matches with third nut 52
It closes, fastening screw 51 is in and is not completely tightened state at this time.Rotational stiffness spring part 20 is pre-fixed by screw in pedestal 10
On.
Then, suitable thimble 30 is selected, and by 60 sets of gap adjustment ring on thimble 30.Thimble 30 includes the first positioning
Ring 31, the first linkage section 32, the second positioning ring 33 and the second linkage section 34, by the second positioning ring 33 and rotational stiffness of thimble 30
The first positioning hole 22 of spring part 20 matches, and the second linkage section 34 is arranged in the first connecting hole 21, the second nut 80 and the
Two linkage sections 34 are threadedly engaged so that one end of thimble 30 to be fixed on rotational stiffness spring part 20, at this time the second nut 80
In being not completely tightened state.First positioning ring 31 of thimble 30 matches positioning, thimble 30 with the connecting pin of fixation clamp 40
The first linkage section 32 and gap adjustment ring 60 be co-located in the receiving hole of 40 connecting pin of fixation clamp.
Then, the relative position of fine tuning fixation clamp 40 and rudderpost 200 and rotational stiffness spring part 20 and pedestal 10, with
Keep the first connecting hole 21 of rotational stiffness spring part 20 and the receiving hole and thimble 30 of fixation clamp 40 coaxial.Tighten fastening spiral shell
Nail 51 tightens the attachment screw of rotational stiffness spring part 20 and pedestal 10 to fix fixation clamp 40 and 200 phase of rudderpost to incite somebody to action
Rotational stiffness spring part 20 is completely fixed with pedestal 10.The second nut 80 is tightened, the center of the receiving hole of fixation clamp 40 is measured
The distance l of axis direction apart from rudderpost 200 measures the height h of gap adjustment ring 60 and is placed in gap adjustment ring 60 solid
Determine on clamp 40.
Finally, the first nut 70 at gap adjustment ring 60 is tightened using torque spanner, write down twisting for the first nut 70
Clamp force square M.According to formulaTo obtain the rotary freedom of rudderpost 200
On gap delta, wherein h be gap adjustment ring 60 height, h0For the height at the connecting pin of fixation clamp 40, Δ l is gap
The deflection of the short transverse of adjustment ring 60, l are the distance of the axis direction of the centre distance rudderpost of receiving hole, and M is the first spiral shell
The screw-down torque of mother 70, k are to turn round to draw coefficient, and d is the screw thread engineering diameter of the first linkage section 32, P0For tightening for the first nut 70
Power, A are the sectional area of gap adjustment ring 60, and E is the elasticity modulus of gap adjustment ring 60.As a result, by adjusting gap adjustment ring
The available different gap width of 60 height.The arrangement achieves the backlash nonlinearities of rotary freedom, realize rotation and (turn round
Turn) affecting laws research of the freedom degree backlash nonlinearity to rudder face buffet characteristic.
In conclusion provided by the present invention for flutter test adjustable clearance device in terms of existing technologies, it is real
Rotation (or torsion) freedom degree for having showed flutter test modelling has the structure problem of implementation of adjustable clearance.Test process
In, by adjusting the height of gap adjustment ring, the adjustable clearance of rotation (torsion) freedom degree is realized, has obtained gap to flutter
The affecting laws of characteristic and properties of limit cycles.Therefore, it is of the invention it is technologically advanced, test implementation method is simple and practical, not only greatly
Reduce to amplitude the difficulty of modelling and the cost of wind tunnel test, saves research fund, while model with higher
Practical value.
For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
In addition, it should be noted that, limiting components using the words such as " first ", " second ", it is only for be convenient for
Corresponding components are distinguished, do not have Stated otherwise such as, there is no particular meanings for above-mentioned word, therefore should not be understood as to this
The limitation of invention protection scope.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of adjustable clearance device for flutter test, which is characterized in that the adjustable clearance device includes:
Pedestal (10)；
Rotational stiffness spring part (20), the rotational stiffness spring part (20) are fixed on the pedestal (10)；
Thimble (30), the thimble (30) are fixed on the rotational stiffness spring part (20), and the thimble (30) includes
The diameter of first positioning ring (31) and the first linkage section (32), first positioning ring (31) is greater than first linkage section (32)
Diameter；
Fixation clamp (40), the fixation clamp (40) have open end and connecting pin, the open end of the fixation clamp (40)
For accommodating rudderpost, the connecting pin of the fixation clamp (40) has receiving hole, the first linkage section (32) of the thimble (30)
In the receiving hole, first positioning ring (31) is for positioning the connecting pin of the fixation clamp (40), rudder
The axis direction of axis is perpendicular with the length direction of the axis direction of thimble (30) and the fixation clamp (40) respectively；
First fastening assembly (50), first fastening assembly (50) setting are described in the open end of the fixation clamp (40)
First fastening assembly (50) is used to the fixation clamp (40) being fixed at rudderpost；
Gap adjustment ring (60), the gap adjustment ring (60) is set on the first linkage section (32) of the thimble (30) and position
In in the receiving hole of the fixation clamp (40), between the connecting pin of the gap adjustment ring (60) and the fixation clamp (40) is
Gap cooperation；
Second fastening assembly, second fastening assembly is set on the first linkage section (32) of the thimble (30), between described
Gap adjustment ring (60) is arranged between first positioning ring (31) and second fastening assembly, and second fastening assembly is used
In fastening the gap adjustment ring (60) to adjust the height of the gap adjustment ring (60), the adjustable clearance device passes through tune
Save the gap on rotary freedom of the height of the gap adjustment ring (60) to adjust the rudderpost.
2. the adjustable clearance device according to claim 1 for flutter test, which is characterized in that the thimble (30)
First linkage section (32) have external screw thread, second fastening assembly include the first nut (70), first nut (70) with
First linkage section (32) is threadedly engaged, described in the adjustable clearance device is adjusted by tightening first nut (70)
The height of gap adjustment ring (60).
3. the adjustable clearance device according to claim 2 for flutter test, which is characterized in that the rotation of the rudderpost
Gap delta in freedom degree can basisTo obtain, wherein h is gap
The height of adjustment ring (60), h0For the height at the connecting pin of (40) of fixation clamp, Δ l is the height of gap adjustment ring (60)
The deflection in direction, l are the distance of the axis direction of the centre distance rudderpost of receiving hole, and M is the screwing force of the first nut (70)
Square, k are to turn round to draw coefficient, and d is the screw thread engineering diameter of the first linkage section (32), P0For the screwing force of the first nut (70), between A is
The sectional area of gap adjustment ring (60), E are the elasticity modulus of gap adjustment ring (60).
4. the adjustable clearance device according to claim 1 for flutter test, which is characterized in that the rotational stiffness bullet
Spring part (20) has the first connecting hole (21) being connected and first positioning hole (22), and the thimble (30) further includes the second positioning
Ring (33) and the second linkage section (34), second positioning ring (33) match with the first positioning hole (22), and described second
In first connecting hole (21), second linkage section (34) has an external screw thread for linkage section (34) setting, and described adjustable
Gap device further includes the second nut (80), and second nut (80) and second linkage section (34) are threadedly engaged with will be described
Thimble (30) is fixed on the rotational stiffness spring part (20).
5. the adjustable clearance device according to claim 4 for flutter test, which is characterized in that first connecting hole
It (21) is coaxial arrangement with the receiving hole of the fixation clamp (40).
6. the adjustable clearance device according to claim 4 for flutter test, which is characterized in that the fixation clamp
It (40) include being fixedly connected with section (41), the first claw (42) and the second claw (43), first claw (42) and described second
Claw (43) is arranged in parallel and connect with the section (41) that is fixedly connected, first claw (42) and second claw
(43) open end is formed, the receiving hole setting is fixedly connected on section (41) described.
7. the adjustable clearance device according to claim 6 for flutter test, which is characterized in that the first fastening group
Part (50) includes fastening screw (51) and third nut (52), and the fastening screw (51) is each passed through first claw (42)
It matches with second claw (43) and with the third nut (52) the fixation clamp (40) is fixed at rudder
On axis.
8. the adjustable clearance device according to claim 1 for flutter test, which is characterized in that the gap adjustment ring
(60) sectional area is 1 to 2 times of the threaded area of first linkage section (32) of the thimble (30).
9. the adjustable clearance device according to claim 1 for flutter test, which is characterized in that the adjustable clearance dress
Setting further includes the first gasket (90), and first gasket (90) is arranged in first nut (70) and the gap adjustment ring
(60) between.
10. the adjustable clearance device according to claim 1 for flutter test, which is characterized in that the adjustable clearance
Device further includes the second gasket (100) and third gasket (110), and second gasket (100) is arranged in second nut
(80) between the rotational stiffness spring part (20), the third gasket (110) is arranged in the third nut (52) and institute
It states between the first claw (42).
Priority Applications (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982460A (en) * | 2020-08-07 | 2020-11-24 | 北京航空航天大学 | Clearance simulation device of wind tunnel model |
| CN112213070A (en) * | 2020-09-21 | 2021-01-12 | 中国航空工业集团公司沈阳飞机设计研究所 | Device for simulating suspension clearance of plug-in under flutter wind tunnel test wing |
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| CN112213070A (en) * | 2020-09-21 | 2021-01-12 | 中国航空工业集团公司沈阳飞机设计研究所 | Device for simulating suspension clearance of plug-in under flutter wind tunnel test wing |
| CN112213070B (en) * | 2020-09-21 | 2023-03-14 | 中国航空工业集团公司沈阳飞机设计研究所 | External object hangs clearance analogue means under flutter wind tunnel test wing |
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| CN110160731B (en) | 2020-11-13 |
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