CN108195539A - A kind of experimental rig for being used to study helicopter blade droop stop - Google Patents
A kind of experimental rig for being used to study helicopter blade droop stop Download PDFInfo
- Publication number
- CN108195539A CN108195539A CN201711135565.0A CN201711135565A CN108195539A CN 108195539 A CN108195539 A CN 108195539A CN 201711135565 A CN201711135565 A CN 201711135565A CN 108195539 A CN108195539 A CN 108195539A
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- China
- Prior art keywords
- impactor
- hanger
- screw
- clamping device
- experimental rig
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Classifications
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The embodiment of the invention discloses a kind of for studying the experimental rig of helicopter blade droop stop, is related to Helicopter Technology field, can be used in the research of influence of the contact-impact during blade droop stop between stop block to blade dynamic response.The present invention includes：Model paddle, clamping device, bearing, Impactor, workbench, pedestal, hanger, sensor, it is connected by screw bolts between model paddle and clamping device, bearings are used between clamping device and dead axle, the clamping device equipped with model paddle is enable to be pivoted, dead axle is fixed on bearing, using interference fit between axis and bearing.Stent and support element weld on the table in pairs, hanger tail portion is connected with stent using dead axle, and model paddle in pylon end using rope is sling using pin connection and be at initial position by hanger and support element, model paddle can be in contact collision from initial position let-down, upper and lower Impactor.
Description
Technical field
The present invention relates to Helicopter Technology field more particularly to a kind of experiments for being used to study helicopter blade droop stop
Device.
Background technology
Lifting airscrew is often highly susceptible to the interference of external environment in operation process, if more complex than encountering
Changeable sea situation environment has an impact the starting and stalling of lifting airscrew.Heligyro start and stalling in,
Rotor can pass through compared with slow-speed of revolution area, the centrifugal force rigidity that blade rotates around the spindle generation is also just relatively less than normal, blade tip there may be
Excessive displacement, collides with fuselage.In the process, with stop block more strong impact, shadow can occur for blade
Ring the dynamic response of blade.
Since during blade droop stop, blade can constantly collide with stop block, larger rush is generated
Hit load, may have to the intensity of blade and service life centainly to influence.Therefore, it is necessary to restraint during blade droop stop
Influence of the contact-impact to blade dynamic response between block is studied.
Invention content
The embodiment of the present invention provides a kind of experimental rig for being used to study helicopter blade droop stop, can be used in paddle
The research of influence of the contact-impact to blade dynamic response during leaf droop stop between stop block.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that：
Experimental rig in the present embodiment includes model paddle, clamping device, bearing, Impactor, workbench, pedestal, hangs
Frame, sensor, are connected by screw bolts between model paddle and clamping device, and bearings are used between clamping device and dead axle,
The clamping device equipped with model paddle is enable to be pivoted, dead axle is fixed on bearing, using interference fit between axis and bearing.
On the table, hanger tail portion is connected with stent using dead axle for welding in pairs for stent and support element, and hanger and support element utilize pin
Model paddle in pylon end using rope is sling and is at initial position or fixes electromagnet respectively to pacify by connection
Loaded on hanger and clamping device, by being powered and power-off makes model paddle upper and lower Impactor can occur from initial position let-down
Contact-impact can study the dynamics problem in its collision process.
The operation principle of experimental rig in the present embodiment is：By model paddle from initial position let-down, blade falls
After certain position, upper and lower two pieces of Impactors can constantly collide, and generate shock loading, may lead to the displacement of blade blade tip
It is excessive.In the process, measure blade tip displacement and acceleration, blade different piece strain, wave angle and impact carry
Lotus.It is achieved thereby that shock loading when dropping for model paddle is effectively measured, surveyed using force snesor or strain-type
Force method measures shock loading.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
For a kind of structure diagram of experimental rig provided in an embodiment of the present invention, (blade is point-to-point when dropping to be touched Fig. 1
It hits)；
Fig. 2 is that the structure diagram of another experimental rig provided in an embodiment of the present invention is (point-to-area during blade tenesmus to touch
It hits)；
Fig. 3 is that the structure diagram of another experimental rig provided in an embodiment of the present invention (touches face-to-face during blade tenesmus
It hits)；
Fig. 4 is provided in an embodiment of the present invention using electromagnet as the schematic diagram of the fixed experimental rig of initial position；
Fig. 5 is force snesor scheme of installation provided in an embodiment of the present invention.
Specific embodiment
For those skilled in the art is made to more fully understand technical scheme of the present invention, below in conjunction with the accompanying drawings and specific embodiment party
Formula is described in further detail the present invention.Embodiments of the present invention are described in more detail below, the embodiment is shown
Example is shown in the drawings, wherein same or similar label represents same or similar element or with identical or class from beginning to end
Like the element of function.It is exemplary below with reference to the embodiment of attached drawing description, is only used for explaining the present invention, and cannot
It is construed to limitation of the present invention.Those skilled in the art of the present technique are appreciated that unless expressly stated, odd number shape used herein
Formula " one ", "one", " described " and "the" may also comprise plural form.It is to be further understood that the specification of the present invention
The middle wording " comprising " used refers to there are the feature, integer, step, operation, element and/or component, but it is not excluded that
Other one or more features of presence or addition, integer, step, operation, element, component and/or their group.It should be understood that
When we claim element to be " connected " or during " coupled " to another element, it can be directly connected or coupled to other elements or
There may also be intermediary elements.In addition, " connection " used herein or " coupling " can include wireless connection or coupling.Here make
Wording "and/or" includes any cell of one or more associated list items and all combines.The art
Technical staff is appreciated that unless otherwise defined all terms used herein have (including technical terms and scientific terms)
The meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.It should also be understood that such as general
Those terms defined in dictionary, which should be understood that, to be had a meaning that is consistent with the meaning in the context of the prior art, and
Unless being defined as here, will not be explained with the meaning of idealization or too formal.
The embodiment of the present invention provides a kind of experimental rig for being used to study helicopter blade droop stop, as shown in Figure 1, packet
It includes：
Model paddle (1), clamping device (2), bearing (3), upper Impactor (4), lower Impactor (5), workbench (6), bottom
Seat (7), stent (8), support element (9), the first hanger (10), the first dead axle (11), the first screw (12), bolt (13), nut
(14), gasket (15), the first screw (16), the second screw (17), third screw (18), the 4th screw (19), the second dead axle
(20), sell (21), rolling bearing (22), clamping piece (23), under rectangular Impactor (24), upper rectangular Impactor (25), inclination angle pass
Sensor (26), resistance strain gage (27), acceleration transducer (28) and pressure sensor (32).
Wherein, model paddle (1) is connected by clamping device (2) with the first dead axle (11), clamping device (2) and the first dead axle
(11) it is supported between by rolling bearing (22), makes model paddle (1) that can be rotated around the first dead axle (11), simulation model is come with this
The droop stop of blade (1).
Upper Impactor (4) is using the first screw (16) on clamping device (2).
Lower Impactor (5) using the second screw (17) on pedestal (7), upper Impactor (4) and lower Impactor (5)
Point-to-point alignment or face-to-face alignment.
First hanger (10) is connect using the second dead axle (20) with stent (8), and the first hanger (10) and support element (9) use
(21) connection is sold, the hole of different height is provided on support element (9), in order to which the first hanger (10) realizes the installation of different angle.
Acceleration transducer (28) is at the blade tip of model paddle (1).
In obliquity sensor (26) mounting clamping device (2), angle is waved for positioning initial position and measurement.
In initial position, the first hanger (10) end rope is connected with the first screw (12) on clamping device (2), will
Model paddle (1) is sling.
It is fixed using third screw (18) between workbench (6) and pedestal (7), it is kept between workbench (6) and pedestal (7)
It is mutually perpendicular to.
Experimental rig in the present embodiment includes model paddle, clamping device, bearing, Impactor, workbench, pedestal, hangs
Frame, sensor, are connected by screw bolts between model paddle and clamping device, and bearings are used between clamping device and dead axle,
The clamping device equipped with model paddle is enable to be pivoted, dead axle is fixed on bearing, using interference fit between axis and bearing.
On the table, hanger tail portion is connected with stent using dead axle for welding in pairs for stent and support element, and hanger and support element utilize pin
Model paddle in pylon end using rope is sling and is at initial position or fixes electromagnet respectively to pacify by connection
Loaded on hanger and clamping device, by being powered and power-off makes model paddle upper and lower Impactor can occur from initial position let-down
Contact-impact can study the dynamics problem in its collision process.
The operation principle of experimental rig in the present embodiment is：By model paddle (1) under initial position let-down, blade
After falling certain position, upper and lower two pieces of Impactors can constantly collide, and generate shock loading, may lead to the position of blade blade tip
It moves past big.In the process, measure blade tip displacement and acceleration, blade different piece strain, wave angle and impact
Load.It is achieved thereby that shock loading when dropping for model paddle is effectively measured, using force snesor or strain-type
Dynamometry measures shock loading.
Specifically, resistance strain gage (27) is affixed on model paddle (1) respectively 20%, 30% and 40% at blade root
Place, and lower Impactor (5) is affixed at bottom 50%, wherein, resistance strain gage (27) connects wireless dynamic strain collector,
The wireless dynamic strain collector is used to acquire strain data.
In practical measurement process, preferred measurement scheme is that the foil gauge on model paddle is affixed on respectively apart from paddle
At 20%, 30% and 40% at root, the foil gauge on Impactor is affixed at bottom 50%, is acquired by wireless dynamic strain
Device acquires strain data.And acceleration transducer is mounted at blade tip, is adopted and is installed in the method for paste, signal adjusts device by suitable
It acquires and arranges with dynamic signal analyzer.Obliquity sensor is installed on clamping device, for positioning initial position and survey
Amount waves angle.
Optionally, as shown in Figure 1, the lower end of upper Impactor (4) and the upper end of lower Impactor (5) they are all semicircle shape.
Alternatively, as shown in Figure 2, the lower end of upper Impactor (4) is semicircle shape.The upper end of lower Impactor (5) is square.
Alternatively, as shown in Figure 3, the lower end of upper Impactor (4) and the upper end of lower Impactor (5) they are all square.
In the present embodiment, square or semicircle shape are to realize point-to-point (Fig. 1), point-to-area (Fig. 2) and (Fig. 3) is touched face-to-face
It hits.It need to prevent from colliding in advance between Impactor there are certain interval during collision face-to-face.
In the present embodiment, as shown in Figure 4, it further includes：Magnechuck (29), the second screw (30), the second hanger
(31)。
Magnechuck (29) is on the second hanger (31), and the second hanger (31) is using the second screw (30) mounted on work
Make on platform (6).
In initial position, clamping device (2) is sling using magnechuck (29).
Further, pressure sensor (32) is mounted on the middle part of lower Impactor (5).Such as：As shown in Figure 5, impact
Load can also use force sensor measuring, lower Impactor be interrupted, force snesor connects and fixes the two parts interrupted respectively
Shock loading is measured with this.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Point just to refer each other, and the highlights of each of the examples are difference from other examples.Especially for equipment reality
For applying example, since it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to embodiment of the method
Part explanation.The above description is merely a specific embodiment, but protection scope of the present invention is not limited to
This, any one skilled in the art in the technical scope disclosed by the present invention, the variation that can readily occur in or replaces
It changes, should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claim
Subject to enclosing.
Claims (7)
1. a kind of experimental rig for being used to study helicopter blade droop stop, which is characterized in that including：Model paddle (1), folder
Hold device (2), bearing (3), upper Impactor (4), lower Impactor (5), workbench (6), pedestal (7), stent (8), support element
(9), the first hanger (10), the first dead axle (11), the first screw (12), bolt (13), nut (14), gasket (15), the first spiral shell
Follow closely (16), the second screw (17), third screw (18), the 4th screw (19), the second dead axle (20), pin (21), rolling bearing
(22), clamping piece (23), under rectangular Impactor (24), upper rectangular Impactor (25), obliquity sensor (26), resistance strain gage
(27), acceleration transducer (28) and pressure sensor (32)；
Wherein, model paddle (1) is connected by clamping device (2) with the first dead axle (11), clamping device (2) and the first dead axle (11)
Between by rolling bearing (22) support, make model paddle (1) that can be rotated around the first dead axle (11), simulation model blade come with this
(1) droop stop；
Upper Impactor (4) is using the first screw (16) on clamping device (2)；
Lower Impactor (5) using the second screw (17) on pedestal (7), upper Impactor (4) and lower Impactor (5) point pair
Point alignment or face-to-face alignment；
First hanger (10) is connect using the second dead axle (20) with stent (8), and the first hanger (10) and support element (9) are using pin
(21) it connects, the hole of different height is provided on support element (9), in order to which the first hanger (10) realizes the installation of different angle；
Acceleration transducer (28) is at the blade tip of model paddle (1)；
In obliquity sensor (26) mounting clamping device (2), angle is waved for positioning initial position and measurement；
In initial position, the first hanger (10) end rope is connected with the first screw (12) on clamping device (2), by model
Blade (1) is sling；
It is fixed using third screw (18) between workbench (6) and pedestal (7), it is kept between workbench (6) and pedestal (7) mutual
Vertically.
2. the experimental rig according to claim 1 for being used to study helicopter blade droop stop, which is characterized in that above touch
The lower end of collision block (4) and the upper end of lower Impactor (5) are all semicircle shape.
3. the experimental rig according to claim 1 for being used to study helicopter blade droop stop, which is characterized in that above touch
The lower end of collision block (4) is semicircle shape；
The upper end of lower Impactor (5) is square.
4. the experimental rig according to claim 1 for being used to study helicopter blade droop stop, which is characterized in that above touch
The lower end of collision block (4) and the upper end of lower Impactor (5) are all square.
5. the experimental rig according to claim 1 for being used to study helicopter blade droop stop, which is characterized in that also wrap
It includes：Magnechuck (29), the second screw (30), the second hanger (31)；
Magnechuck (29) is on the second hanger (31), and the second hanger (31) is using the second screw (30) mounted on workbench
(6) on；
In initial position, clamping device (2) is sling using magnechuck (29).
6. the experimental rig according to claim 1 for being used to study helicopter blade droop stop, which is characterized in that resistance
Foil gauge (27) is affixed on respectively on model paddle (1) at blade root 20%, 30% and 40%, and is affixed on lower Impactor (5)
At bottom 50%, wherein, resistance strain gage (27) connects wireless dynamic strain collector, the wireless dynamic strain acquisition
Device is used to acquire strain data.
7. the experimental rig according to claim 1 for being used to study helicopter blade droop stop, which is characterized in that pressure
Sensor (32) is mounted on the middle part of lower Impactor (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711135565.0A CN108195539B (en) | 2017-11-13 | 2017-11-13 | A test device for studying helicopter paddle lifts tenesmus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711135565.0A CN108195539B (en) | 2017-11-13 | 2017-11-13 | A test device for studying helicopter paddle lifts tenesmus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108195539A true CN108195539A (en) | 2018-06-22 |
| CN108195539B CN108195539B (en) | 2019-12-06 |
Family
ID=62572993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711135565.0A Expired - Fee Related CN108195539B (en) | 2017-11-13 | 2017-11-13 | A test device for studying helicopter paddle lifts tenesmus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108195539B (en) |
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| CN108195539B (en) | 2019-12-06 |
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