CN101078431A - Rotation axis oscillating attack angle changing device - Google Patents
Rotation axis oscillating attack angle changing device Download PDFInfo
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- CN101078431A CN101078431A CN 200710049350 CN200710049350A CN101078431A CN 101078431 A CN101078431 A CN 101078431A CN 200710049350 CN200710049350 CN 200710049350 CN 200710049350 A CN200710049350 A CN 200710049350A CN 101078431 A CN101078431 A CN 101078431A
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Abstract
The invention relates to a swing variable pitch device of rotation shaft, characterized in that the device comprises I-grade fixed casing (1) fixed on the support (10), I-grade output gear shaft (4) set in the I-grade fixing casing (1), II-grade output gear shaft (6) set in the II-grade movable casing (7) and II-grade gear pair (5) by which I-grade output gear shaft (4) is matched with the II-grade output gear shaft (6); bearing seat is set on the support (10) and bearings (17, 18) are set in the bearing seat; the II-grade movable casing (7) is fixed on bearings (17, 18) and bearings (17, 18) are concentric with the I-grade output gear shaft (4), namely they have the same rotating center (21); swing adjustable arm (8) is fixed on the II-grade movable casing (7). The invention can be used in any transmission where output shaft and positive shaft are parallel or angle while under the condition of rotation with power the output shaft can swing and transform attack angle.
Description
One, technical field
The present invention relates to a kind of rotation axis oscillating attack angle changing device that when running shaft rotates, can also change the running shaft angle of attack.
Two, background technique
In some occasion, need when being rotated, running shaft can also change the angle of attack of running shaft.But the implementation of prior art generally all is when achieving the above object, and the power mechanism of driven rotary axle (comprising reducing gear toward contact) is also along with running shaft is swung synchronously.Certainly will take enough swing spaces like this, cause a large amount of unnecessary energy consumptions simultaneously.
Such as, lifting airscrew/FUSELAGE COMBINATION MODEL has rotating speed up to 1050 rev/mins, and maximum output is the characteristics of 180KW.Simultaneously, need the device that can change the running shaft angle of attack, under different angle of attack states, experience the size that wind carries to reach the simulation rotating model.For reaching the required power of test, also require this device to have the function of big retarding ratio simultaneously.Generally, the mode of taking is: power motor, retarder and transmission shaft are swung simultaneously and are reached the conversion running shaft angle of attack, so make attack angle changing device increase bulk.In addition, the sealing of wind-tunnel hole body during for proof test, the active part of device must be placed within the wind-tunnel.So, this is than the device of large space size, and the bearing that has increased undoubtedly in the wind tunnel test process disturbs.Because during wind tunnel test, model supports bigger bulk and irregular contour,, and influence the authenticity of test data with the flow field quality of big holocaust wind-tunnel.
Three, summary of the invention
The objective of the invention is to overcome the deficiency of common usual means technology, design a kind of rotation axis oscillating attack angle changing device, make this device when power mechanism drives the rotating model rotation of being fixed on the running shaft (output shaft), rotating model also can be swung the conversion angle of attack, simultaneously, also require power mechanism and fixed bearing not swing with rotating model as standing part.
Basic ideas of the present invention are: oscillating attack angle changing device comprises that can be realized output shaft retarder and change angle of attack mechanism that is made up of electric actuating tube and swing adjustment arm etc. around the oscillation center oscillating attack angle changing in the high speed rotation.Retarder mainly is made up of the I level gear reduction casing that is mutually related, II level gear reduction casing.The relative bearing of I level gear reduction casing is fixed, so claim fixedly casing of I level; II level gear reduction casing is connected by bearing with I level gear reduction casing, can rotate to change the angle of attack, so claim II level activity casing around the I level output gear shaft in the I level speed reducing gear pair.II level activity casing drives II level output gear shaft (output shaft) and swings around I level output gear shaft (4) simultaneously under the prerequisite of high speed rotation, thereby reaches the effect that makes the rotating model pitching deflection that is fixed on the II level output gear shaft (output shaft).
Retarder is fixed on the bearing, and the power of motor is passed to II level output gear shaft (output shaft) and rotating model through twice 90 ° of communtation decelerations.
Control of running shaft pitching deflection angle and fixed-site are finished by electric actuating tube control mechanism, electric actuating tube one end is fixed on the bearing, the other end drives the swing adjustment arm that is fixed on the II level activity casing and rotates around movable casing center of rotation, position limit pin on the II level activity casing fixedly slides in the curve bath on the casing in the I level, to limit the running shaft luffing angle.
Concrete technical solution of the present invention is:
A kind of rotation axis oscillating attack angle changing device is characterized in that: this rotation axis oscillating attack angle changing device comprises:
Be fixed in the fixing casing (1) of I level on the bearing (10), be loaded on the fixedly I level output gear shaft (4) in the casing (1) of I level;
Be loaded on the II level output gear shaft (6) in the II level activity casing (7);
Match by II level gear pair (5) between I level output gear shaft (4) and the II level output gear shaft (6);
Be provided with bearing support on bearing (10), bearing (17,18) is housed in bearing support, II level activity casing (7) is fixed on the bearing (17,18), and bearing (17,18) is concentric with I level output gear shaft (4), promptly has identical center of rotation (21);
On II level activity casing (7), be fixed with swing and adjust arm (8).
So design just can be implemented in when allowing II level output gear shaft (6) rotate and can also change the angle of attack around I level output gear shaft (4), and has swing to adjust the size that arm (8) is adjusted the angle of attack.
Further scheme is: fixedly be provided with position limit pin (23) and the curve bath that cooperatively interacts on casing (1) and the II level activity casing (7) in the I level.Position limit pin (23) can be fixed on the I level fixedly on the casing (1), corresponding curve bath just is located on the II level activity casing (7), otherwise position limit pin (23) also can be fixed on the II level activity casing (7), and corresponding curve bath just is located at the I level fixedly on the casing (1).Position limit pin (23) and curve bath the amplitude of fluctuation that can control II level activity casing (7) is set.
Further scheme is: be provided with an electric actuating tube (19), electric actuating tube (19) one ends are connected on the bearing (10), and the other end is adjusted arm (8) with swing and is connected.Described Placement can be that the fixedly connected the other end of an end is hinged or two ends are all hinged.Certainly, also electric actuating tube (19) can be changed into manually, hydraulic pressure or mode such as pneumatic.
Further scheme is again: fixedly on the casing (1) I level input gear shaft (2) is housed also in the I level, I level input gear shaft (2) one ends are connected on the output shaft of power motor (20), and the other end is imported gear shaft (2) by the I level and matched with I level gear pair (3) on the I level output gear shaft (4).Power motor (20) also can be replaced by other power plant.
Better scheme is: II level gear pair (5) and/or I level gear pair (3) are speed reducing gear pairs.Be II level gear pair (5) and/or I level gear pair (3) can be simultaneously with the function of deceleration.
Generally speaking, between I level output gear shaft (4) and the II level output gear shaft (6) and should be vertical mutually between I level input gear shaft (2) and the I level output gear shaft (4), and I level gear pair (3) and II level gear pair (5) be that spiral is bored tooth or umbrella toothing.
It is parallel with driving shaft or have in any driving mechanism of angle that the present invention can be used in output shaft, also can make the situation lower swing conversion angle of attack of output shaft in the drive rotation simultaneously.
This device is compared advantage with original device and is: with the fixedly casing of power motor and the retarder standing part as whole device, and can be placed to wind-tunnel base plate lower end, not expose to the open air in wind-tunnel.The movable casing drive II level output gear shaft of retarder and rotating model can be swung the conversion angle of attack around oscillation center again in the working speed rotation.During test, under the prerequisite that realizes conversion rotating model state, make the model bearing bulk that exposes to the open air in wind-tunnel inside very little.Succeeding in developing of this device makes the rotating model bearing to the interference of tunnel airstream tangible improvement arranged, and test result is more accurate.
Four, description of drawings
Fig. 1 is the structural representation of rotation axis oscillating attack angle changing device.
Fig. 2 is the swing mechanism sketch of rotation axis oscillating attack angle changing device.
Among the figure: the 1-I level is casing fixedly, 2-I level input gear shaft, 3-I level gear pair, 4-I level output gear shaft, 5-II level gear pair, 6-II level output gear shaft, 7-II level activity casing, arm is adjusted in the 8-swing, the 9-rotating model, 10-bearing, 11-1 bearing, 12-2 bearing, the 13-3 bearing, 14-4 bearing, 15-5 bearing, 16-6 bearing, the 17-7 bearing, 18-8 bearing, 19-electric actuating tube, 20-power motor, the movable casing center of rotation of 21-, 22-fixing bolt, 23-position limit pin.
Five, embodiment
Below in conjunction with accompanying drawing the present invention is done detailed description.
As Fig. 1, Fig. 2, the rotation axis oscillating attack angle changing device that present embodiment is used with the helicopter test stand is an example, at first, introduces the working principle in this device.
1. rotation working principle: promptly power motor 20 drives 2 rotations of I level input gear shaft, slow down through I level speed reducing gear pair 3, and power is changed 90 ° pass to I level output gear shaft 4, I level output gear shaft 4 is simultaneously also as II level input gear shaft, slow down through II level speed reducing gear pair 5 again, once more power is changed 90 ° and pass to II level output gear shaft 6, the II level output gear shaft 6 driven rotary model 9 that links to each other with corresponding assembly rotates synchronously.
2. oscillating attack angle changing working principle: at first, this device should possess the structure that can swing.Be II level activity casing 7 by bearing 17,18 and I level fixedly casing 1 link to each other with bearing 10, and can swing around I level output gear shaft 4.Realize this function, fixedly the bearing 18,17 that links to each other with bearing 10 of casing 1 must be concentric with I level output gear shaft (4) just to require II level activity casing 7 and I level, promptly has identical center of rotation 21.The motion of II level activity casing 7 is to adjust arm 8 by swing, realized and controlled by electric actuating tube 19.II level activity casing 7 drives II level output gear shaft 6 and rotating model 9 and swings together in swing.
In realizing above two motions, II level speed reducing gear pair 5 is existing to be meshing with each other and to transmit rotation and power, the relative rolling motion between geared surface again, so require the axis of II level output gear shaft 6 and the axis of I level output gear shaft 4 must guarantee in same plane, the precision of each gear and the concentricity requirement of installation shaft are all than higher.
Under off working state, II level activity casing 7 can be fixed on vertical position by 4 fixing bolts 22.
Equipment lubrication and sealing: each driving gear engagement place of the retarder of present embodiment and load bearing all adopt the pressure splash lubrication.Lubricant oil adopts 4450 synthetic lubricating oil, and flow is no less than 20L/min, and lubricant oil is supplied with by external lubrication system, nozzle filler opening oil pressure 0.2～0.3MPa.At II level activity casing 7 lower end both directions a return opening is set respectively, all the energy oil return was smooth and easy when assurance II level activity casing 7 leaned forward with maximum layback position in maximum.I level fixedly casing 1 return opening is located at bottom.II level activity casing 7 and I level fixedly casing 1 coupling bearing 17,18 rotational velocity are low, and the relative movement amplitude is less, and lubricating requirement is relatively low.One end ball bearing can adopt the grease lubrication mode, isolates by Bearing Installation seat and retarder inner chamber, can effectively guarantee sealing, and the other end roller bearing adopts the splash lubrication mode, adopts the mode of one-level O-ring seals and felt sealing combination to guarantee sealing.
The reducer gear material is selected high-quality steel for carburizing forging 20CrMnTi commonly used, and the parameter of spiral bevel gear pair and intensity should satisfy usage requirement.
By designing requirement, one-level is driven/and load that secondary driving gear axle bearing is born is quite big, need think better of the working life of bearing in the design.
The life-span of bearing 15,16 all should be more than 7000 hours; Bearing 11,12 selects for use airframe bearing to satisfy usage requirement fully; Bearing 13,14 carryings are bigger, and especially bearing 14, and plain bearing can not satisfy load bearing requirements, must need custom-made to increase the bearing of bearing capacity, meet design requirement; Bearing 13 bears the axial force and the radial force of two gears, selects four contact pulling force ball bearings ( 90 * 160 * 30), and bearing dynamic load rating value is bigger, satisfies life requirements.Pitching deflection carrier bearing 17,18 bearings are only examined static strength, and the basic static capacity (BSC) rating of bearing 17,18 all should much larger than the load of being born, satisfy usage requirement more than 150000N.
The solution of the several technological difficulties of the present invention
1, selects to be subjected to the bigger bearing of radial force
The consequence that I level speed reducing gear pair 3 velocity ratios increase is, II level deceleration input speed reduces, and II level speed reducing gear pair 5 loads increase, and cause II level speed reducing gear pair 5 size design and bearing to select comparatively difficulty.
Because the radial force that bearing 14 bears two gears, maximum value is about 42000N, plain bearing by 70 * 125 specifications does not reach necessary rated load, must need custom-made to increase the bearing of bearing capacity, what the present invention selected is that two roller bearings use the mode of (single bearing relative dimensions 70 * 125 * 24 can unify to use total dynamic load rating 180000N after the reconditioning of need the matching debugging) side by side, met design requirement greater than 1500 hours working life.
2, the fixing both aligning of bearing 10 of casing 1 and movable casing bearing support of I level
Because I level fixedly casing 1, II level activity casing 7 and bearing 10 is generally the split design, for guaranteeing the proper functioning of II level speed reducing gear pair 5 and deflection spring bearing 17,18, the I level is casing 1 and the accurate aligning of bearing 10 necessary assurances fixedly, highly regulates and finishes by the grinding spacer.Join the brill positioning pin hole after finishing, make locating stud.
Use condition in flying to test in the hovering test on ground with before in wind-tunnel according to the helicopter test stand illustrates that the rotation axis oscillating attack angle changing device in the high speed rotation of the present invention meets the design objective requirement fully, and development is successful.
Claims (5)
1, a kind of rotation axis oscillating attack angle changing device is characterized in that: this rotation axis oscillating attack angle changing device comprises:
Be fixed in the fixing casing (1) of I level on the bearing (10), be loaded on the fixedly I level output gear shaft (4) in the casing (1) of I level;
Be loaded on the II level output gear shaft (6) in the II level activity casing (7);
Match by II level gear pair (5) between I level output gear shaft (4) and the II level output gear shaft (6);
Be provided with bearing support on bearing (10), bearing (17,18) is housed in bearing support, II level activity casing (7) is fixed on the bearing (17,18), and bearing (17,18) is concentric with I level output gear shaft (4), promptly has identical center of rotation (21);
On II level activity casing (7), be fixed with swing and adjust arm (8).
2, rotation axis oscillating attack angle changing device according to claim 1 is characterized in that: fixedly be provided with position limit pin (23) and the curve bath that cooperatively interacts on casing (1) and the II level activity casing (7) in the I level.
3, rotation axis oscillating attack angle changing device according to claim 1 is characterized in that: be provided with an electric actuating tube (19), electric actuating tube (19) one ends are connected on the bearing (10), and the other end is adjusted arm (8) with swing and is connected.
4, rotation axis oscillating attack angle changing device according to claim 1, it is characterized in that: fixedly on the casing (1) I level input gear shaft (2) is housed also in the I level, I level input gear shaft (2) one ends are connected on the output shaft of power motor (20), and the other end is imported gear shaft (2) by the I level and matched with I level gear pair (3) on the I level output gear shaft (4).
5, according to claim 1 or 4 described rotation axis oscillating attack angle changing devices, it is characterized in that: II level gear pair (5) and/or I level gear pair (3) are speed reducing gear pairs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100493507A CN100458228C (en) | 2007-06-22 | 2007-06-22 | Rotation axis oscillating attack angle changing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100493507A CN100458228C (en) | 2007-06-22 | 2007-06-22 | Rotation axis oscillating attack angle changing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101078431A true CN101078431A (en) | 2007-11-28 |
| CN100458228C CN100458228C (en) | 2009-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100493507A Expired - Fee Related CN100458228C (en) | 2007-06-22 | 2007-06-22 | Rotation axis oscillating attack angle changing device |
Country Status (1)
| Country | Link |
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| CN (1) | CN100458228C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896017A (en) * | 2015-05-29 | 2015-09-09 | 上海大学 | Self-rotating transmission device with bending moment and swing shaft for bevel gear wheels |
| CN108593243A (en) * | 2018-04-23 | 2018-09-28 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of helicopter built-up pattern experimental rig |
| CN109296573A (en) * | 2018-10-17 | 2019-02-01 | 江苏钧微动力科技有限公司 | A kind of plug-in rotation with conical gear reducer is straight to drive electrohydraulic servo valve |
| CN109681582A (en) * | 2019-01-08 | 2019-04-26 | 南京航空航天大学 | The coaxial rotor transmission device of power dividing twice |
| CN112393873A (en) * | 2021-01-11 | 2021-02-23 | 中国空气动力研究与发展中心低速空气动力研究所 | Attack angle matching method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8503488A (en) * | 1985-12-18 | 1987-07-16 | Daf Special Products B V | GEAR TRANSMISSION, ESPECIALLY FOR HELICOPTER APPLICATION. |
| CN87214618U (en) * | 1987-10-28 | 1988-08-03 | 金丹 | Worm wheel type windmill with automatic control attack angle |
| CN100396912C (en) * | 2005-09-09 | 2008-06-25 | 欧子文 | Swinging wind-driven set |
-
2007
- 2007-06-22 CN CNB2007100493507A patent/CN100458228C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896017A (en) * | 2015-05-29 | 2015-09-09 | 上海大学 | Self-rotating transmission device with bending moment and swing shaft for bevel gear wheels |
| CN108593243A (en) * | 2018-04-23 | 2018-09-28 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of helicopter built-up pattern experimental rig |
| CN108593243B (en) * | 2018-04-23 | 2024-02-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Helicopter combined model test device |
| CN109296573A (en) * | 2018-10-17 | 2019-02-01 | 江苏钧微动力科技有限公司 | A kind of plug-in rotation with conical gear reducer is straight to drive electrohydraulic servo valve |
| CN109296573B (en) * | 2018-10-17 | 2024-04-12 | 江苏钧微动力科技有限公司 | Plug-in type rotary direct-drive electrohydraulic servo valve with conical gear reducer |
| CN109681582A (en) * | 2019-01-08 | 2019-04-26 | 南京航空航天大学 | The coaxial rotor transmission device of power dividing twice |
| CN112393873A (en) * | 2021-01-11 | 2021-02-23 | 中国空气动力研究与发展中心低速空气动力研究所 | Attack angle matching method |
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| Publication number | Publication date |
|---|---|
| CN100458228C (en) | 2009-02-04 |
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Granted publication date: 20090204 Termination date: 20130622 |