CN109029808A - A kind of airborne propeller dynamic tension measuring device - Google Patents
A kind of airborne propeller dynamic tension measuring device Download PDFInfo
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- CN109029808A CN109029808A CN201810727114.4A CN201810727114A CN109029808A CN 109029808 A CN109029808 A CN 109029808A CN 201810727114 A CN201810727114 A CN 201810727114A CN 109029808 A CN109029808 A CN 109029808A
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- 238000009434 installation Methods 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 230000033001 locomotion Effects 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims description 29
- 239000003292 glue Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 19
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0033—Force sensors associated with force applying means applying a pulling force
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The present invention provides a kind of airborne propeller dynamic tension measuring devices, belong to dynamometry technical field, including motor, tension sensor, propeller, bottom plate.Propeller is provided with paddle shaft, and two positioning bearings are sequentially installed in paddle shaft, and centre is fixed with long shaft gear.The rotation of motor passes sequentially through short axle gear, transmission gear, and long shaft gear passes to paddle shaft.Tension sensor is fitted close by tension sensor output shaft thereon with the inner ring of bearing.The outer ring of bearing and one end of spring link together, and between each other not slidably, the other end of spring is connected with paddle shaft, and the rotational movement spring of paddle shaft rotates.Propeller dynamic tension measuring device provided by the invention reduces that propeller is anti-twisted, and the influence of rotation vibration and motor weight to tension measurement result, structure is simple, and cost is relatively low, and measurement accuracy is high, and installation and maintenance is convenient.
Description
Technical field
The present invention relates to dynamometry technical fields, in particular to a kind of airborne propeller dynamic tension measuring device.
Background technique
The pulling force of propeller under different conditions is an important data in aircraft research and design process, propeller
Ground test, need to measure the pulling force of propeller, and on a kind of parasite power test flight platform, it is also desirable to right
The pulling force of propeller is measured in real time, meanwhile, to measuring device, more stringent requirements are proposed, such as lightweight, high reliability,
High precision.
In the past, to the tensile test of propeller, the mostly quiet tensile test on ground, measuring device structure is more complicated, no
It is easily transferred on airborne test platform, moreover, because propeller rotation can bring bigger vibration and anti-twisted power, power is passed
The mode of sensor and object rigid connection to be measured be easy to cause force sensor data measurement inaccurate.
In Chinese publication [a kind of unmanned plane of CN201710997476- propeller dynamic tension monitoring device],
The scheme of use is, by the setting of straight-line motion mechanism, to enable head propulsion system moving axially back and forth along fuselage,
It without circumferentially rotating, can be realized under the conditions of live flying, the detection of the dynamic tension of propeller, still, the party
In case, tension sensor is arranged in the rear portion of motor, the pulling force for making entire propulsion system of actual measurement rather than independent spiral shell
The pulling force of paddle is revolved, and since motor mass is big, the entirety vibration of propulsion system is bigger.Data acquisition to tension sensor
Bigger influence is caused, the precision of measurement is affected, causes the precision of measurement lower.
Moreover, because the posture moment of aircraft could not examine change, the above-mentioned published patent occurs in flight course
Consider influence of the attitude of flight vehicle change to tension measurement numerical value, this further results in its scheme used, and the precision of measurement is inclined
It is low.
Summary of the invention
The present invention provides a kind of airborne propeller dynamic tension measuring devices, it is intended to improve existing unmanned plane propeller
Dynamic tension test device shakes big and flight since the propulsion systems component own wt such as motor is big, in the course of work
The problem of device posture changes the influence to measurement result, leads to low measurement accuracy.
The present invention is implemented as follows:
A kind of airborne propeller device for testing tensile force, including motor, tension sensor, propeller, bottom plate；
The propeller is provided with paddle shaft, and the paddle shaft is provided with the first positioning bearing close to propeller part, far from spiral shell
The part of rotation is provided with the second positioning bearing, and among the first positioning bearing and the second positioning bearing, it is fixed with long axis tooth
Wheel.
The first positioning bearing is mounted on the first installation partition, and the second positioning bearing is mounted on the second peace
It fills on partition.The setting of two positioning bearings, limits the direction of paddle shaft, but do not influence its rotary motion and fortune in the axial direction
It is dynamic.
The transmission gear and motor is also mounted between the first installation partition and the second installation partition.Driving cog
The setting of wheel can be transmitted in paddle shaft, more efficiently to utilize motor by the original revolving speed speedup of motor or after slowing down.
Short axle gear is installed, short axle gear engages transmitting with intermediate transmission gear on the motor shaft of the motor
Torque, transmission gear are finally engaged with the long shaft gear in paddle shaft, drive paddle shaft rotation.The long shaft gear, the course of work
In, it is kept in contact always with transmission gear, guarantees the continuity of power transmitting.
On the bottom plate, it is additionally provided with third installation partition, the third is installed on partition, and pull sensing is provided with
Device, described tension sensor one end are equipped with tension sensor output shaft, the tension sensor output shaft, with bearing
Inner ring is fitted close.The outer ring of the bearing and one end of spring link together, and between each other not slidably;
The other end of the spring is connected with paddle shaft, the rotational movement spring rotation of paddle shaft.Due to bearing inner race and outside
Circle, which can compare, to be freely rotatable, therefore although the rotary motion of paddle shaft has driven the rotation of spring, but the rotary motion will not
Tension sensor is passed to, the influence so as to avoid torsion to tension sensor, here, tension sensor only measures pulling force.
Further, the tension sensor output shaft is arranged with paddle shaft coaxial line.Coaxially arranged, dynamometry is more smart
Really, while the structure quake as caused by not coaxial is avoided.
Further, the fit system of the tension sensor output shaft and bearing inner race, can be interference fit, can
To be the aperture the turn of the screw on inner ring, matched screw thread at tension sensor output shaft and bearing inner race processing, pulling force can be
The rotation of sensor output shaft is installed on bearing inner race, and adds screw glue.Pulling force is generated since propeller rotates, drives paddle shaft forward
Movement, spring elongation, so the cooperation of tension sensor output shaft and bearing inner race, need to guarantee certain bonding strength, rotation
It does not fall off in the process.
Further, the paddle shaft, multiple identical numbers of teeth, the gear of identical modulus is equidirectional to be compactly fixed on paddle shaft
On, because customizing long shaft gear higher cost, herein preferably, multiple identical numbers of teeth, the gear Tongfang of identical modulus
To being compactly fixed in paddle shaft, ordinary gear can be used, reach the technical effect of special long shaft gear, be further reduced
Cost.
Further, the first installation partition and the second installation partition, standoff distance are the 5%- of airscrew diameter
30%, it has been found that can preferably keep the side of paddle shaft when two install the standoff distance of partitions within the above range
To being designed using reasonable structure and reduce the vibration that propeller incomplete equilibrium causes paddle shaft.
Further, the transmission gear, quantity is less than 10, to reduce the power loss of intergrade.
Further, the tension sensor has attitude transducer, by the reading to aircraft current pose,
The actual measurement pulling force data of tension sensor is corrected, and obtains more accurate value of thrust.
Further, the stiffness factor range of the spring is 0.2N/mm -5N/mm, and applicant has found by practice,
When the stiffness factor of spring belongs in above range, damping effect is preferable, and the numerical value that pull force calculation obtains is more accurate.
The present invention provides a kind of airborne propeller dynamic tension measuring devices, fill in this airborne propeller tensile test
Motor, tension sensor, propeller, bottom plate are set.Propeller is provided with paddle shaft, and two locating shafts are sequentially installed in paddle shaft
It holds, centre is fixed with long shaft gear.The rotation of motor passes sequentially through short axle gear, transmission gear, and long shaft gear passes to paddle
Axis.Tension sensor is fitted close by tension sensor output shaft thereon with the inner ring of bearing.The outer ring of bearing and bullet
One end of spring links together, and between each other not slidably, the other end of spring is connected with paddle shaft, the rotary motion of paddle shaft
Drive spring rotation.
The course of work is such that starting motor, and the rotary motion of motor passes sequentially through motor short axle gear, is driven
Gear, long shaft gear pass to paddle shaft, and paddle shaft rotation drives propeller rotational, position-limiting action of the paddle shaft in two positioning bearings
Under, it axially travels forward, makes spring elongation, meanwhile, also drive spring rotation.Since spring is fixed on the outer ring of bearing
On, so the pulling force of spring can pass to the inner ring of bearing, and torsion does not transmit, in this way, tension sensor can measure reality
The value of thrust on border, and the interference of torsion is eliminated, meanwhile, spring stress stretches, and has the effect of bumper and absorbing shock, it is possible to reduce paddle
Axis shakes the interference to dynamometry.Attitude transducer reads the current posture of aircraft, by compensating due to attitude of flight vehicle angle pair
The error of tension measurement makes the value of thrust of output be more nearly actual value.
Airborne propeller dynamic tension measuring device provided by the invention can eliminate the interference of torsion and paddle shaft vibration,
Measure the pulling force of propeller more accurately, simultaneously as tension sensor it is measured directly be paddle shaft pulling force, reduce and push away
Into the components own wt such as system, the influence to measurement result precision is shaken.And the introducing of attitude transducer, it compensates for due to flying
Tension measurement error caused by row device attitude angle, keeps measurement result more accurate.Airborne propeller dynamic provided by the invention is drawn
Force measuring device, structure is simple, and cost is relatively low, and measurement accuracy is high, and installation and maintenance is convenient.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, also
Other relevant attached drawings can be obtained according to these attached drawings.
Fig. 1: the structure chart of airborne propeller dynamic tension measuring device totality；
Fig. 2: bearing-spring-paddle shaft connection schematic diagram；
Fig. 3: transmission shaft, long shaft gear mesh schematic representation.
Appended drawing reference summarizes
Motor 1, transmission gear 11, short axle gear 12, tension sensor 2, tension sensor output shaft 21, attitude transducer
22, propeller 3, bottom plate 4, first install partition 41, second and install partition 42, the third installation positioning bearing of partition 43, first
411, the second positioning bearing 421, paddle shaft 5, long shaft gear 51, bearing 6, spring 7.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
Fig. 1 is the structure chart of airborne propeller dynamic tension measuring device totality provided in an embodiment of the present invention；
Fig. 2 is bearing provided in an embodiment of the present invention-spring-paddle shaft connection schematic diagram；
Fig. 3 is transmission shaft provided in an embodiment of the present invention, long shaft gear mesh schematic representation.
Referring to Fig.1, a kind of airborne propeller dynamic tension test device of the embodiment of the present invention, including motor 1, pulling force pass
Sensor 2, propeller 3, bottom plate 4；The propeller 3 is provided with paddle shaft 5, and the paddle shaft 5 is close to 3 part of propeller, setting
There is the first positioning bearing 411, the part far from spiral is provided with the second positioning bearing 421, and positions 411 He of bearing first
Among second positioning bearing 421, it is fixed with long shaft gear 51.
The first positioning bearing 411 is mounted on the first installation partition 41, and the second positioning bearing 421 is installed
On the second installation partition 42.Two positioning bearings setting, limit the direction of paddle shaft 5, but do not influence its rotary motion and
Movement in axial direction.
The transmission gear 11 and motor 1 is also mounted between the first installation partition 41 and the second installation partition 42.
The setting of transmission gear 11 can be transmitted in paddle shaft 5, with more efficiently by the original revolving speed speedup of motor 1 or after slowing down
Utilize motor 1.
Short axle gear 12, short axle gear 12 and intermediate transmission gear 11 are installed on the motor shaft of the motor 1
Engagement transmitting torque, transmission gear 11 are finally engaged with the long shaft gear 51 in paddle shaft 5, and paddle shaft 5 is driven to rotate.The long axis
Gear 51 in the course of work, is kept in contact with transmission gear 11 always, guarantees the continuity of power transmitting.
On the bottom plate 4, it is additionally provided with third installation partition 43, the third is installed on partition 43, and pulling force is provided with
Sensor 2, described 2 one end of tension sensor are equipped with tension sensor output shaft 21, the tension sensor output shaft
21, it is fitted close with the inner ring of bearing 6.The outer ring of the bearing 6 and one end of spring 7 link together, and between each other
Not slidably, the other end of the spring 7 is connected with paddle shaft 5, and the rotational movement spring 7 of paddle shaft 5 rotates.Due to axis
It holds 6 inner ring and outer rings and can compare and be freely rotatable, therefore although the rotary motion of paddle shaft 5 has driven the rotation of spring 7, but should
Rotary motion is not transferred to tension sensor 2, the influence so as to avoid torsion to tension sensor 2, here, pull sensing
2 measurement pulling force of device.
Further, the tension sensor output shaft 21 is arranged with 5 coaxial line of paddle shaft.Coaxially arranged, dynamometry is more
Accurately, while the structure quake as caused by not coaxial is avoided.
Further, the fit system of the tension sensor output shaft 21 and 6 inner ring of bearing, can be interference and matches
It closes, can be the aperture the turn of the screw on inner ring, can be matched spiral shell at the 6 inner ring processing of tension sensor output shaft 21 and bearing
Line, the rotation of tension sensor output shaft 21 is installed on 6 inner ring of bearing, and adds screw glue.Pulling force is generated since propeller 3 rotates,
Paddle shaft 5 is driven to travel forward, spring 7 stretches, so the cooperation of tension sensor output shaft 21 and 6 inner ring of bearing, need to guarantee one
Fixed bonding strength is not fallen off in rotary course.
Further, the paddle shaft 5, multiple identical numbers of teeth, the gear of identical modulus is equidirectional to be compactly fixed on paddle
On axis 5, because customizing long 51 higher cost of shaft gear, herein preferably, and multiple identical numbers of teeth, the gear of identical modulus
It is equidirectional to be compactly fixed in paddle shaft 5, ordinary gear can be used, reach the technical effect of special long shaft gear 51, into
One step reduces cost.
Further, the first installation partition 41 and the second installation partition 42, standoff distance are 3 diameter of propeller
5%-30%, it has been found that when two installation partitions standoff distance within the above range when, can preferably keep paddle shaft
5 direction is designed using reasonable structure to reduce the vibration that 3 incomplete equilibrium of propeller causes paddle shaft 5.
Further, the transmission gear 11, quantity is less than 10, to reduce the power loss of intergrade.
Further, the tension sensor 2 has attitude transducer 22, passes through the reading to aircraft current pose
Take, can the actual measurement pulling force data to tension sensor 2 be corrected, obtain more accurate value of thrust
Further, the stiffness factor range of the spring 7 is 0.2N/mm -5N/mm, and applicant has found by practice, when
When the stiffness factor of spring 7 is belonged in above range, damping effect is preferable, and the numerical value that pull force calculation obtains is more accurate.
In this embodiment, belong to broad sense to each installation partition of fixation using the shell-like structure of fuselage as bottom plate
On bottom plate concept, also be regarded as being within the scope of the present invention.
In this embodiment, for the stiffness factor of the spring 7 used for 1N/mm, and under stationary state, head promotes system
The weight of system is 0.4kg, and corresponding calculating and test result show under the state that the intrinsic frequency of spring is about 7.8Hz, when
When the revolving speed of propeller is greater than 2000 r/min, the vibration isolation rate of system is maintained at 95% or more, and when revolving speed is greater than 1600r/min
When, the vibration isolation rate of system is 90% or more.
It is proved by a large number of experiments, airborne propeller dynamic tension measuring device provided by the invention is in master screw paddle
It uses, is compared with strain balance measurement data in wind-tunnel, average relative error illustrates this hair within 5% in quiet pulling experiment
Bright design is reasonable, and vibration isolating effect is good.
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 (8)
1. a kind of airborne propeller dynamic tension measuring device, including motor, tension sensor, propeller, bottom plate；
It is characterized by:
The propeller is provided with paddle shaft, and the paddle shaft is provided with the first positioning bearing close to propeller part, far from spiral shell
The part of rotation is provided with the second positioning bearing, and among the first positioning bearing and the second positioning bearing, it is fixed with long axis tooth
Wheel;
The described first positioning bearing is mounted on the first installation partition, the second positioning bearing be mounted on the second installation every
On plate;
The transmission gear and motor is also mounted between the first installation partition and the second installation partition;
Short axle gear is installed, short axle gear engages transmitting with intermediate transmission gear and turns round on the motor shaft of the motor
Square, transmission gear are finally engaged with the long shaft gear in paddle shaft, and paddle shaft is driven to rotate, the long shaft gear, in the course of work,
Always it is kept in contact with transmission gear;
On the bottom plate, it is additionally provided with third installation partition, the third is installed on partition, is provided with tension sensor, institute
The tension sensor one end stated is equipped with tension sensor output shaft, the tension sensor output shaft, the inner ring with bearing
It is fitted close;
The outer ring of the bearing and one end of spring link together, and between each other not slidably;
The other end of the spring is connected with paddle shaft, the rotational movement spring rotation of paddle shaft.
2. a kind of airborne propeller dynamic tension measuring device as described in claim 1, which is characterized in that the pulling force passes
Sensor output shaft is arranged with paddle shaft coaxial line.
3. a kind of airborne propeller dynamic tension measuring device as described in claim 1, which is characterized in that the pulling force passes
The fit system of sensor output shaft and bearing inner race can be interference fit, can be the aperture the turn of the screw on inner ring, can be
Matched screw thread at tension sensor output shaft and bearing inner race processing, the rotation of tension sensor output shaft are installed in bearing
Circle, and add screw glue.
4. a kind of airborne propeller dynamic tension measuring device as described in claim 1, which is characterized in that the paddle shaft,
Multiple identical numbers of teeth, the gear of identical modulus is equidirectional to be compactly fixed in paddle shaft.
5. a kind of airborne propeller dynamic tension measuring device as described in claim 1, which is characterized in that first peace
Partition and the second installation partition are filled, standoff distance is the 5%-30% of airscrew diameter.
6. a kind of airborne propeller dynamic tension measuring device as described in claim 1, which is characterized in that the driving cog
Wheel, quantity is less than 10.
7. a kind of airborne propeller dynamic tension measuring device as described in claim 1, which is characterized in that the pulling force passes
Sensor has attitude transducer.
8. a kind of airborne propeller dynamic tension measuring device as described in claim 1, which is characterized in that the spring strength
Degree coefficient range is 0.2N/mm -5N/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810727114.4A CN109029808A (en) | 2018-07-05 | 2018-07-05 | A kind of airborne propeller dynamic tension measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810727114.4A CN109029808A (en) | 2018-07-05 | 2018-07-05 | A kind of airborne propeller dynamic tension measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN109029808A true CN109029808A (en) | 2018-12-18 |
Family
ID=65522410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810727114.4A Pending CN109029808A (en) | 2018-07-05 | 2018-07-05 | A kind of airborne propeller dynamic tension measuring device |
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| Country | Link |
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| CN (1) | CN109029808A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112551431A (en) * | 2020-12-15 | 2021-03-26 | 浙江三门太和大型锻造有限公司 | Device is got to mould steel hoist and mount clamp |
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| CN204202796U (en) * | 2014-11-24 | 2015-03-11 | 深圳市尚腾影科技有限公司 | Screw propeller motor device for testing tensile force |
| CN104749031A (en) * | 2015-04-13 | 2015-07-01 | 武汉理工大学 | Measurement jig and measurement method for rotary blade |
| CN105865694A (en) * | 2016-06-28 | 2016-08-17 | 中国南方航空工业(集团)有限公司 | Turboprop engine pull strength measurement device |
| CN205664959U (en) * | 2016-06-07 | 2016-10-26 | 洛克希德（武汉）无人机科学研究院有限公司 | Be applied to dynamic pulling force testing arrangement on unmanned aerial vehicle motor and rotor |
| CN206291992U (en) * | 2016-12-23 | 2017-06-30 | 观典防务技术股份有限公司 | A kind of measurement structure of the electronic unmanned plane motor pulling force of fixed-wing |
| CN208458906U (en) * | 2018-07-05 | 2019-02-01 | 陈俊胤 | A kind of airborne propeller dynamic tension measuring device |
-
2018
- 2018-07-05 CN CN201810727114.4A patent/CN109029808A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316229A (en) * | 2014-11-15 | 2015-01-28 | 西北工业大学 | Propeller dynamic tension and torque duplex measuring device |
| CN204202796U (en) * | 2014-11-24 | 2015-03-11 | 深圳市尚腾影科技有限公司 | Screw propeller motor device for testing tensile force |
| CN104749031A (en) * | 2015-04-13 | 2015-07-01 | 武汉理工大学 | Measurement jig and measurement method for rotary blade |
| CN205664959U (en) * | 2016-06-07 | 2016-10-26 | 洛克希德（武汉）无人机科学研究院有限公司 | Be applied to dynamic pulling force testing arrangement on unmanned aerial vehicle motor and rotor |
| CN105865694A (en) * | 2016-06-28 | 2016-08-17 | 中国南方航空工业(集团)有限公司 | Turboprop engine pull strength measurement device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112551431A (en) * | 2020-12-15 | 2021-03-26 | 浙江三门太和大型锻造有限公司 | Device is got to mould steel hoist and mount clamp |
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