CN104527967A - Movable and static conversion bearing for coaxial contra-rotation type screw propeller pitch varying device - Google Patents
Movable and static conversion bearing for coaxial contra-rotation type screw propeller pitch varying device Download PDFInfo
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- CN104527967A CN104527967A CN201410762842.0A CN201410762842A CN104527967A CN 104527967 A CN104527967 A CN 104527967A CN 201410762842 A CN201410762842 A CN 201410762842A CN 104527967 A CN104527967 A CN 104527967A
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- angular contact
- contact ball
- movable
- bearing
- screw propeller
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Abstract
The invention discloses a movable and static conversion bearing for a coaxial contra-rotation type screw propeller pitch varying device. The movable and static conversion bearing is composed of two or more than two even-number-time angular contact ball bearings, wherein the angular contact ball bearings are divided into two groups; one end with a thin outer sleeve wall of each angular contact ball bearing in each group and the other end with a thick outer sleeve wall are connected and mounted in sequence; and one ends with the thin outer sleeve walls of the two groups of angular contact ball bearings which are mounted in sequence are mounted together. The movable and static conversion bearing is applied to the coaxial contra-rotation type screw propeller pitch varying device; a fork lug keeps a static state when a pitch varying lever is rotated; and the rotating pitch varying lever can be driven by the fork lug to do reciprocating motion along the axial direction, so that the movable and static conversion is realized.
Description
Technical field
The present invention relates to a kind of coaxial contrarotating Propeller variable pitch device sound and change bearing.
Background technology
Under the state of low cruise, the blade tip of propeller blade can form tangential airstream eddy current, and this eddy current can cause certain degradation of energy, at theoretic, the eddy current that coaxial contrarotating screw propeller two groups of blades produce when rotating can cancel each other, and the degradation of energy caused by eddy current drops to minimum.Due to antagonistic force principle, when a propeller rotational, air can produce the contrary power of a cireular frequency to driving engine, i.e. moment of torsion by blade; The moment of torsion that the blade of coaxial contrarotating screw propeller two groups of contrarotations produces is cancelled out each other, and do not need by regulating aircraft aileron to carry out trim moment of torsion, the design of aircraft is simplified, and also considerably increases the stability of aircraft.Owing to eliminating the airstream eddy current of blade blade tip, dual rotation propeller can increase the efficiency of about 6%-10% than general screw propeller.Therefore, schedule has been put in the research of coaxial contrarotating Propeller technology.The variable pitch device of screw propeller is under the various mode of operations of driving engine and aircraft, controls screw propeller and can work under the state of the blade angle of the best, to reach the optimum working efficiency of screw propeller.For automatic pitch propeller, require that blade angle changes with factors vary such as engine power, flying height, speed, attitude and ambient temperatures, to maintain propeller speed constant (pneumatic efficiency height point).Due to two groups of blade contrarotations of coaxial contrarotating screw propeller, the pitch-changing mechanism of existing one row spiral oar can not meet the displacement requirement of coaxial contrarotating screw propeller, realize for enabling coaxial contrarotating screw propeller, need to study its pitch-changing mechanism, how to make the transmission that bending moment mechanism had both realized along Propeller variable pitch direction (S. A. direction) power, also achieve simultaneously and achieve the key that the function of forward and backward screw propeller to the dynamic linking of transhipment and sound conversion is technology.
Summary of the invention
Object of the present invention solves the above-mentioned problems in the prior art exactly, a kind of coaxial contrarotating Propeller variable pitch device sound is provided to change bearing, this bearing is applied in coaxial contrarotating Propeller variable pitch device, when both can realize Adjustable length rod rotation, fork ear keeps quiescence, the Adjustable length rod crank motion vertically pitching ear driven rotary can also be realized, realize sound conversion.
For achieving the above object, technical solution of the present invention is: a kind of coaxial contrarotating Propeller variable pitch device sound changes bearing, and it is made up of two and above even numbers times angular contact ball bearing; Angular contact ball bearing is divided into two groups, one end that the overcoat wall of each angular contact ball bearing in each group is thin order that connects with one end of another overcoat wall thickness is installed, and one end that the two groups of angular contact ball bearing overcoat walls sequentially installed are thin is mounted opposite together.
Angular contact ball bearing can bear Radial load and axial load simultaneously, can work at higher rotational speeds.Two and above even numbers times angular contact ball bearing can bear Radial load and axial load according to installing the sound conversion bearing formed with upper type simultaneously, and can bear the power of axial both direction, ensure that the crank motion of Adjustable length rod in axis.In a word, the present invention is applied in coaxial contrarotating Propeller variable pitch device, and when both can realize Adjustable length rod rotation, fork ear keeps quiescence, can also realize the Adjustable length rod crank motion vertically pitching ear driven rotary, realizes sound conversion; That is it had both realized the transmission along Propeller variable pitch direction (S. A. direction) power, also achieved simultaneously and achieved forward and backward screw propeller to transporting dynamic linking and sound conversion.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figure 1, the present embodiment is made up of four angular contact ball bearings 25.Every two angular contact ball bearings 25 are one group, one end 28 that overcoat 26 wall of the angular contact ball bearing 25 often in group is thin order that connects with one end 29 of another overcoat wall thickness is installed, and one end 28 that two groups of angular contact ball bearing 25 overcoat walls sequentially installed are thin is mounted opposite together.27 is the inner sleeve of angular contact ball bearing 25.Described high-speed bearing 7 is made up of two main shaft bearings 30; Together with one end 32 thin with overcoat 33 wall of another main shaft bearing 30, one end 32 that overcoat 33 wall of a main shaft bearing 30 is thin is mounted opposite; 31 is one end of main shaft bearing 30 overcoat wall thickness, and 34 is the inner sleeve of main shaft bearing 30.The quantity of angular contact ball bearing 25 sets the even numbers such as two, six, eight doubly as required.
Above-described embodiment is only preferred and exemplary, and those skilled in the art can do equivalent technologies according to the spirit of this patent and improve, and these all covered by the protection domain of this patent.
Claims (1)
1. coaxial contrarotating Propeller variable pitch device sound changes a bearing, it is characterized in that: it is made up of two and above even numbers times angular contact ball bearing; Angular contact ball bearing is divided into two groups, one end that the overcoat wall of each angular contact ball bearing in each group is thin order that connects with one end of another overcoat wall thickness is installed, and one end that the two groups of angular contact ball bearing overcoat walls sequentially installed are thin is mounted opposite together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410762842.0A CN104527967A (en) | 2014-12-14 | 2014-12-14 | Movable and static conversion bearing for coaxial contra-rotation type screw propeller pitch varying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410762842.0A CN104527967A (en) | 2014-12-14 | 2014-12-14 | Movable and static conversion bearing for coaxial contra-rotation type screw propeller pitch varying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104527967A true CN104527967A (en) | 2015-04-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410762842.0A Pending CN104527967A (en) | 2014-12-14 | 2014-12-14 | Movable and static conversion bearing for coaxial contra-rotation type screw propeller pitch varying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104527967A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244762A (en) * | 2008-03-21 | 2008-08-20 | 周公平 | Power-driven system of aerial vehicle |
| EP1990275A1 (en) * | 2007-05-11 | 2008-11-12 | Antoine Hubert | Coaxial contrarotating helicopter rotor |
| EP2524866A2 (en) * | 2011-05-16 | 2012-11-21 | Rolls-Royce plc | A variable pitch propeller rotor |
| CN204452919U (en) * | 2014-12-14 | 2015-07-08 | 惠阳航空螺旋桨有限责任公司 | Coaxial contrarotating Propeller variable pitch device sound changes bearing |
-
2014
- 2014-12-14 CN CN201410762842.0A patent/CN104527967A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1990275A1 (en) * | 2007-05-11 | 2008-11-12 | Antoine Hubert | Coaxial contrarotating helicopter rotor |
| CN101244762A (en) * | 2008-03-21 | 2008-08-20 | 周公平 | Power-driven system of aerial vehicle |
| EP2524866A2 (en) * | 2011-05-16 | 2012-11-21 | Rolls-Royce plc | A variable pitch propeller rotor |
| CN204452919U (en) * | 2014-12-14 | 2015-07-08 | 惠阳航空螺旋桨有限责任公司 | Coaxial contrarotating Propeller variable pitch device sound changes bearing |
Non-Patent Citations (1)
| Title |
|---|
| 张家库: "高速角接触球轴承静动态参数性能分析", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150422 |