CN207826546U - A kind of life-cycle pulp hub structure - Google Patents
A kind of life-cycle pulp hub structure Download PDFInfo
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- CN207826546U CN207826546U CN201721893027.3U CN201721893027U CN207826546U CN 207826546 U CN207826546 U CN 207826546U CN 201721893027 U CN201721893027 U CN 201721893027U CN 207826546 U CN207826546 U CN 207826546U
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Abstract
The utility model provides a kind of life-cycle pulp hub structure, including pulp hub central part, paddle shaft, paddle folder and blade, blade axis connection pulp hub central part and paddle folder, blade setting presss from both sides end in paddle, paddle shaft upper edge paddle presss from both sides end direction and is equipped with first bearing successively, second bearing and 3rd bearing, paddle shaft are equipped with step surface, and second bearing and 3rd bearing are separately positioned on the both sides of step surface.The utility model shares the centrifugal force of blade rotation using two installation bearings of lifting airscrew pulp hub, and the service life of bearing is substantially improved, it is made to meet the use of unmanned helicopter life cycle management.
Description
Technical field
The utility model belongs to Helicopter Technology field, and in particular to a kind of life-cycle pulp hub structure.
Background technology
Helicopter blade in high-speed rotation process, can form very big centrifugal force.Helicopter pulp hub is mainly by paddle
The pulling force that centrifugal force possessed by leaf is brought.To keep the connective stability of aircraft blade, typically at least set in helicopter pulp hub
Set 2-3 bearing connect paddle folder axis and paddle folder, with support paddle press from both sides and make aircraft awing paddle folder around paddle folder axis rotation adjusting
Blade angle is to adjust airplane ascensional force.Traditional rotor pulp hub bearing generally only have helicopter service life half-life or ten/
The service life in even 200 hours one service life has seriously affected maintenance cost and repair consistency.In traditional design scheme, bearing
Generally use parallel way, as shown in Figure 1, bearing 1 and bearing 22 use parallel way, suffered by bearing 1 and bearing 22
Power there is no because bearing quantity and bring improvement.Therefore, it is impossible to meet the use of helicopter life cycle management, serious shadow
Maintenance cost and repair consistency are rung.
Patent a kind of variable speed rigid rotor aircraft pulp hub (date of publication 2017.01.04, publication No.
CN106275422A a kind of variable speed rigid rotor aircraft propeller hub) is provided, the rigidity of rotating speed wide variation is suitable for
Rotor, including propeller hub center piece, added resilience piece in propeller hub center piece, propeller hub center piece are fixed with change jointly with added resilience piece
Away from hinge.The first journal bearing and the second journal bearing are provided in the patent between pitch hinge inner cylinder and pitch hinge shell.Patent
A kind of main rotor pulp hub of unmanned helicopter (day for announcing 2017.8.1, notification number CN206394883U) discloses that a kind of nobody is straight
The main rotor pulp hub of the machine of liter, including rotor head, end fastener, the first thrust bearing, the second thrust bearing, retaining ring, fastening
Bolt, main shaft, runs through connecting rod, boss at roller bearing；End fastener is provided in the rotor head, main shaft is plugged in rotation
In wing head, boss is provided on main shaft, there are three steps for the left side setting of boss, and are installed successively from left to right on three steps
There are the first thrust bearing, the second thrust bearing, retaining ring and roller bearing；The retaining ring passes through several fastenings with rotor head
Bolt is fixed；Described is fixedly connected across main shaft with end fastener through connecting rod.First thrust bearing of the patent, second
Using interference fit between the outer circle of thrust bearing and the endoporus of rotor head；The outer circle of main shaft is stopped with the first thrust bearing, second
Using interference fit between the endoporus of thrust bearing.Bearing in above-mentioned 2 parts of comparisons patent has been all made of being connected in parallel for similar Fig. 1
Mode so that two bearings can not be shared simultaneously by the centrifugal force of equal extent, be easy to cause bearing fatigue loosening,
It needs midway to safeguard during helicopter use to replace, it is time-consuming and laborious costly.
Therefore urgent need is a kind of simple in structure, and can promote bearing service life makes it meet what helicopter life cycle management used
Life-cycle pulp hub structure.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of life-cycle pulp hub structure, which utilizes and go straight up to
Two installation bearings of machine rotor hub share the centrifugal force of blade rotation, and the service life of bearing is substantially improved, makes its satisfaction
Unmanned helicopter life cycle management uses.
The utility model provides the following technical solution：
A kind of life-cycle pulp hub structure, including pulp hub central part, paddle shaft, paddle press from both sides and blade, in blade axis connection pulp hub
Central member and paddle folder, blade setting press from both sides end in paddle, and paddle shaft upper edge paddle presss from both sides end direction and is equipped with first bearing, second bearing successively
And 3rd bearing, paddle shaft are equipped with step surface, second bearing and 3rd bearing are separately positioned on the both sides of step surface.
Preferably, the outer diameter of second bearing is less than the outer diameter of 3rd bearing, and the outer diameter of 3rd bearing is more than the outer of step surface
Diameter.
Preferably, second bearing is thrust ball bearing, and first bearing and 3rd bearing are deep groove ball bearing.
Preferably, further include paddle clip pad piece, sealing ring, screw, shimmy damper and the second screw, paddle, which presss from both sides, is equipped with spiral shell in axis
Hole, screw are arranged in screw hole, and paddle clip pad piece is fixed by screws on the outside of paddle folder shaft end, and sealing ring is arranged in paddle clip pad piece
Between being pressed from both sides paddle, paddle folder end includes the first clamping piece and second intermediate plate of setting symmetrical above and below, in first clamping piece and second intermediate plate
Two pairs of through-holes symmetrical above and below are respectively equipped with, through-hole is equipped with transition sleeve, and the transition sleeve of a pair of of through-hole is equipped with shimmy damper,
The second screw is equipped in the transition sleeve of another pair through-hole, blade is fixed on paddle by shimmy damper and the second screw and presss from both sides end.
Preferably, further include that paddle presss from both sides control arm, flexural pivot, pull rod and motor, paddle folder control arm is arranged in the both sides that paddle presss from both sides, slurry
Hub central part bottom is equipped with pull rod, and pull rod both ends are separately connected 2 paddles by flexural pivot and press from both sides control arm, and motor is connect with pull rod, electricity
Machine controls pull rod and swings drive paddle folder rotation.
Preferably, blade upper and lower surface connects shimmy damper and the second screw by rotor gasket.
The utility model has the beneficial effects that：
1, the utility model structure is improved simple, easy for installation, of low cost.
2, the utility model shares the centrifugal force of blade rotation using two installation bearings of lifting airscrew pulp hub, substantially
The service life for promoting bearing makes it meet the use of unmanned helicopter life cycle management, can reduce maintenance cost and use cost.
3, the utility model second bearing is thrust ball bearing, and first bearing and 3rd bearing are deep groove ball bearing.Second
Bearing is main centrifugal force stress bearing, and axial forces can be effectively undertaken using thrust ball bearing.First bearing and 3rd bearing
Radial strength can both have been born using deep groove ball bearing or born axial forces, wherein 3rd bearing can share part it is axial from
Mental and physical efforts.
4, the utility model paddle clip pad piece is fixed by screws on the outside of paddle folder shaft end, and sealing ring is arranged in paddle clip pad piece
Between being pressed from both sides with paddle, being completely embedded between making paddle folder axis and paddle press from both sides is firm.
5, the utility model pull rod both ends are separately connected 2 paddles by flexural pivot and press from both sides control arm, and motor is connect with pull rod, motor
It controls pull rod and swings drive paddle folder rotation, connection structure is simple, and convenient in-flight control paddle is pressed from both sides around paddle folder axis rotation, with adjustment
The angle of blade, and then adjust the lift of aircraft.
Description of the drawings
Attached drawing is used to provide a further understanding of the present invention, and a part for constitution instruction, with this practicality
Novel embodiment for explaining the utility model, does not constitute limitations of the present invention together.In the accompanying drawings：
Fig. 1 is prior art shaft strength cross-sectional view；
Fig. 2 is the utility model shaft strength cross-sectional view；
Fig. 3 is the bearing setting cross-sectional view of the utility model；
Fig. 4 is the bearing setting perspective cross section structural schematic diagram of the utility model；
Fig. 5 is the assembly explosive view of the utility model；
Fig. 6 is the utility model rotor overall structure diagram.
In figure label for：1, bearing one；2, bearing two；3, pulp hub central part；4, paddle shaft；41, step surface；5, paddle presss from both sides；
6, blade；7, first bearing；8, second bearing；9,3rd bearing；10, paddle clip pad piece；11, sealing ring；12, screw；13, shimmy
Damper；14, the second screw；15, transition sleeve；16, gasket；17, the second transition sleeve；18, rotor gasket；19, paddle presss from both sides control arm；
20, flexural pivot；21, pull rod；22, motor.
Specific implementation mode
Preferred embodiments of the present invention are described below in conjunction with the accompanying drawings.
As shown in Figures 2 to 5, a kind of life-cycle pulp hub structure, including pulp hub central part 3, paddle shaft 4, paddle folder 5 and blade
6, paddle shaft 4 connects pulp hub central part 3 and paddle folder 5, and the setting of blade 6 presss from both sides 5 ends in paddle, and 4 upper edge paddle of paddle shaft presss from both sides 5 end directions
It is equipped with first bearing 7, second bearing 8 and 3rd bearing 9 successively, paddle shaft 4 is equipped with step surface 41, second bearing 8 and third
Bearing 9 is separately positioned on the both sides of step surface 41.
Specifically, the outer diameter of second bearing 8 is less than the outer diameter of 3rd bearing 9, the outer diameter of 3rd bearing 9 is more than step surface 41
Outer diameter.Specifically, second bearing 8 is thrust ball bearing, first bearing 7 and 3rd bearing 9 are deep groove ball bearing.
Specifically, further including paddle clip pad piece 10, sealing ring 11, screw 12, shimmy damper 13 and the second screw 14, paddle folder
Screw hole is equipped in axis 4, screw 12 is arranged in screw hole, and paddle clip pad piece 10 is fixed on paddle by screw 12 and presss from both sides on the outside of 4 end of axis, close
For the setting of seal 11 between paddle clip pad piece 10 and paddle folder 5, paddle presss from both sides the first clamping piece that 5 ends include setting symmetrical above and below and the second folder
Two pairs of through-holes symmetrical above and below are respectively equipped in piece, first clamping piece and second intermediate plate, through-hole is equipped with transition sleeve 15, a pair of of through-hole
Transition sleeve 15 be equipped with shimmy damper 13, the second screw 14 is equipped in a transition sleeve 15 of another pair through-hole, blade 6 is logical
It crosses shimmy damper 13 and the second screw 14 is fixed on paddle and presss from both sides 5 ends.Second screw 14 is soket head cap screw.
Specifically, being additionally provided with gasket 16 between paddle folder axis 4 and first bearing 7.Specifically, shimmy damper 13 and transition sleeve
The second transition sleeve 17 is additionally provided between 15.
Specifically, 6 upper and lower surface of blade connects shimmy damper 13 and the second screw 14 by rotor gasket 18.
As shown in figure 5, further including paddle folder control arm 19, flexural pivot 20, pull rod 21 and motor 22, paddle presss from both sides the setting of control arm 19 and exists
The both sides of paddle folder 5,3 bottom of pulp hub central part are equipped with pull rod 21, and 21 both ends of pull rod are separately connected 2 paddle folder controls by flexural pivot 20
Arm 19, motor 22 are connect with pull rod 21, and motor 22 controls pull rod 21 and swings 5 rotation of drive paddle folder.
Specific works realization principle is as follows：
As shown in Figure 1, prior art middle (center) bearing 1 and bearing 22 use parallel way, what bearing 1 and bearing 22 were subject to
Pulling force caused by centrifugal force is almost identical, is F, and the forced area of bearing 1 and bearing 22 is also identical.
It is mainly connected using non-parallel way with 3rd bearing 9 by second bearing 8 in the utility model, 8 He of second bearing
3rd bearing 9 shares pulling force caused by bearing centrifugal force, and the pulling force that second bearing 8,3rd bearing 9 are subject to is set as F1 and F2, F1+
F2=F.Since 8 forced contact area of second bearing is more than 3rd bearing 9, then second bearing 8 undertakes main centrifugal force and causes
Pulling force, 3rd bearing 9 be subject to it is main is extruded in outer ring, so abrasion when bearing rotary is not affected substantially.Cause
This utility model between the prior art mainly compared with bearing 1, bearing 22 and second bearing 8 service life.Assuming that axis
Hold the bearing that one 1, bearing 22 and second bearing 8 are same model, the pulp hub of the prior art and the pulp hub bearing of the utility model
Each structure and volume are essentially identical.
Bearing life calculation formula is as follows：
Wherein, L10Basic rating life (10^6r)；L10hBasic rating life (hour)；The basic dynamic load ratings of C-；
P- bearing loads；The coefficient that ε-bearing type determines.
Basic dynamic load rating calculation formula is as follows：
C=bmfcLwe 7/9Z3/4Dwe 29/27 (2)
Wherein, bm、fcCoefficient；LweRoller effective length；Z- is effective；DweRoller diameter.
It is then calculated according to the size that the utility model uses, the forced contact area difference of second bearing 8 and 3rd bearing 9
For 270.24mm2And 76.62mm2.Then the structural volume power that identical with Fig. 1 second bearing 8 is born substantially and bearing 1 or axis
Hold the ratio between the power that 22 bear, i.e. bearing load P2/P1It can be calculated by following formula：
(270.24/ 76.62+270.24)=0.78 (3)
If basic dynamic load rating C is constant, then the basic dynamic load rating C of the bearing 1 or bearing 22 of the prior art1
Equal to the basic dynamic load rating C of the utility model second bearing 82, then by C1、C2、P2/P1Result bring bearing life into respectively
In calculation formula (1), following formula can be calculated：
Then according to formula (4) and (5) it is found that the service life of the utility model second bearing 8 is original bearing 1 and axis
Hold 22 service lifes 2 times.If traditional micron order bearing that bearing 1 and bearing 22 use, can generally meet and go straight up to
The half-life of machine service life, and can then reach the full longevity of helicopter service life using the second bearing 8 of the utility model
Life, to reduce maintenance cost and use cost.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, although ginseng
The utility model is described in detail according to previous embodiment, it for those skilled in the art, still can be with
Technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features.It is all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this practicality
Within novel protection domain.
Claims (6)
1. a kind of life-cycle pulp hub structure, which is characterized in that including pulp hub central part, paddle shaft, paddle folder and blade, the blade
Pulp hub central part described in axis connection and paddle folder, blade setting press from both sides end in the paddle, described in the paddle shaft upper edge
Paddle presss from both sides end direction and is equipped with first bearing, second bearing and 3rd bearing successively, and the paddle shaft is equipped with step surface, and described the
Two bearings and the 3rd bearing are separately positioned on the both sides of the step surface.
2. life-cycle pulp hub structure according to claim 1, which is characterized in that the outer diameter of the second bearing is less than described
The outer diameter of 3rd bearing, the outer diameter of the 3rd bearing are more than the outer diameter of the step surface.
3. life-cycle pulp hub structure according to claim 2, which is characterized in that the second bearing is thrust ball bearing,
The first bearing and the 3rd bearing are deep groove ball bearing.
4. life-cycle pulp hub structure according to claim 1, which is characterized in that further include paddle clip pad piece, sealing ring, spiral shell
Nail, shimmy damper and the second screw, the paddle folder axis is interior to be equipped with screw hole, and the screw is arranged in the screw hole, the paddle
Clip pad piece is fixed on the paddle by the screw and presss from both sides on the outside of shaft end, the sealing ring setting the paddle clip pad piece with it is described
Between paddle folder, paddle folder end includes the first clamping piece and second intermediate plate of setting symmetrical above and below, the first clamping piece and described
Two pairs of through-holes symmetrical above and below are respectively equipped in second intermediate plate, the through-hole is equipped with transition sleeve, the transition of a pair of through-hole
It puts on and is equipped with shimmy damper, be equipped with the second screw in the transition sleeve of through-hole described in another pair, the blade passes through described shimmy
Damper and second screw are fixed on paddle folder end.
5. life-cycle pulp hub structure according to claim 1, which is characterized in that further include paddle folder control arm, flexural pivot, pull rod
And motor, the paddle folder control arm are arranged in the both sides that the paddle presss from both sides, pulp hub central part bottom is equipped with pull rod, the pull rod
Both ends are separately connected 2 paddles by flexural pivot and press from both sides control arm, and the motor is connect with the pull rod, described in the motor control
Pull rod, which is swung, drives the paddle folder rotation.
6. life-cycle pulp hub structure according to claim 4, which is characterized in that the blade upper and lower surface passes through rotor pad
Piece connects the shimmy damper and second screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721893027.3U CN207826546U (en) | 2017-12-29 | 2017-12-29 | A kind of life-cycle pulp hub structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721893027.3U CN207826546U (en) | 2017-12-29 | 2017-12-29 | A kind of life-cycle pulp hub structure |
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| CN207826546U true CN207826546U (en) | 2018-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107985586A (en) * | 2017-12-29 | 2018-05-04 | 江苏方阔航空科技有限公司 | A kind of life-cycle pulp hub structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107985586A (en) * | 2017-12-29 | 2018-05-04 | 江苏方阔航空科技有限公司 | A kind of life-cycle pulp hub structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190910 Address after: 404100 North Section 390 Shuangfu Street, Jiangjin District, Chongqing Patentee after: Chongqing Camel Aviation Technology Co., Ltd. Address before: No. 1 Dongji Avenue, Jiangning Development Zone, Nanjing City, Jiangsu Province, 210000 Patentee before: Jiangsu Fang wide Aeronautical Technology Co., Ltd. |
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| TR01 | Transfer of patent right |