CN210027882U - Variable pitch propeller blade and propeller hub connecting device - Google Patents
Variable pitch propeller blade and propeller hub connecting device Download PDFInfo
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- CN210027882U CN210027882U CN201920743779.4U CN201920743779U CN210027882U CN 210027882 U CN210027882 U CN 210027882U CN 201920743779 U CN201920743779 U CN 201920743779U CN 210027882 U CN210027882 U CN 210027882U
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- lasso
- ferrule
- paddle
- neck
- sleeve pipe
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Abstract
The utility model discloses a variable pitch propeller paddle and propeller hub connecting device, include: the paddle passes through coupling assembling and is connected with the propeller hub, and the blade root end of paddle includes the neck and is located the spacing pier nose of neck end department, and the propeller hub includes the lasso, and coupling assembling includes adjustment sleeve pipe and fastening nut, wherein: a limiting retainer ring integrally formed with the ferrule is arranged in the ferrule and between the two ends of the ferrule; the periphery of one end of the ferrule is provided with an external thread; the outer diameter of the adjusting sleeve is sequentially increased from one end to the other end; under the installation state, the neck at the paddle is cased to the adjustment sleeve pipe, and the path end of adjustment sleeve pipe is towards spacing mound head, and spacing mound head is held by the external screw thread place of lasso and is stretched into in the lasso and support and lean on with spacing retaining ring, and the adjustment sleeve pipe supports with the inner wall of lasso and supports and lean on, and fastening nut suit is in the outside of lasso and with the external screw thread threaded connection on the lasso. The utility model discloses can effectively improve fastness and the reliability that paddle and propeller hub are connected.
Description
Technical Field
The utility model relates to an aeronautical equipment technical field especially relates to a variable pitch propeller paddle and propeller hub connecting device.
Background
As an important component of an aircraft, propellers are subjected to vibratory stresses from the engine and the air flow during operation, as well as to high bending stresses and great centrifugal stresses, which are complex and great stresses that cause the propeller system to operate at all times with the risk that mechanical failure may lead to a force landing or to violent vibrations sufficient to damage the aircraft. At present, however, most of the propellers and the propeller hub in the market are connected only by means of compression friction, and the blades are mostly of carbon fiber structures, the forming dimensional tolerance of the blades cannot be as precise as that of metal, the propellers bear vibration stress from an engine and airflow during the operation, and simultaneously bear high bending stress and huge centrifugal stress, and the complex and huge stress causes the propeller system to always have risks during the operation, the safety and the reliability of the propellers are reduced, and even safety accidents are caused.
SUMMERY OF THE UTILITY MODEL
Based on the technical problem that exists among the above-mentioned background art, the utility model provides a variable pitch propeller paddle and propeller hub connecting device.
The utility model provides a pair of displacement propeller paddle and propeller hub connecting device, include: the paddle passes through coupling assembling and is connected with the propeller hub, the blade root end of paddle includes the neck and is located the spacing pier nose of neck end department, the propeller hub includes the lasso, coupling assembling is including adjusting sleeve pipe and fastening nut, wherein:
a limiting retainer ring integrally formed with the ferrule is arranged in the ferrule and between the two ends of the ferrule; the periphery of one end of the ferrule is provided with an external thread; the outer diameter of the adjusting sleeve is sequentially increased from one end to the other end; under the installation state, the neck at the paddle is cased to the adjustment sleeve pipe, and the path end of adjustment sleeve pipe is towards spacing mound head, and spacing mound head is held by the external screw thread place of lasso and is stretched into in the lasso and support and lean on with spacing retaining ring, and the adjustment sleeve pipe supports with the inner wall of lasso and supports and lean on, and fastening nut suit is in the outside of lasso and with the external screw thread threaded connection on the lasso.
Preferably, the ferrule is provided with at least two cutting grooves axially extending from one end close to the external thread to one end far away from the external thread, and the cutting grooves are uniformly distributed around the circumference of the ferrule.
Preferably, the port edge of fastening nut one end is equipped with the thrust retaining ring of turning over to its inboard, and under the installation condition, the one end that the adjustment sleeve pipe kept away from spacing pier nose leans on with the thrust retaining ring.
Preferably, the outer edge of the large-diameter end of the adjusting sleeve is provided with a flanging.
Preferably, the limiting pier head and the neck are in smooth transition.
The utility model discloses in, through setting up the adjusting sleeve at the paddle neck to the dimensional tolerance who utilizes adjusting sleeve's tapering change adjusting paddle neck, and it is fixed with paddle and lasso locking to utilize fastening nut, thereby realizes that the paddle is fixed with the propeller hub, and this connected mode can effectively improve the fastness and the reliability that paddle and propeller hub are connected.
Drawings
Fig. 1 is a schematic structural view of a connecting device for a variable pitch propeller blade and a hub according to the present invention.
Detailed Description
The technical solution of the present invention will be described in detail by the following embodiments.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a device for connecting a variable pitch propeller blade and a hub according to the present invention.
Referring to fig. 1, the utility model provides a variable pitch propeller blade and propeller hub connecting device, include: the paddle 1 is connected with the propeller hub through the connecting assembly, the blade root end of the paddle 1 comprises a neck and a limiting pier head located at the end of the neck, and the limiting pier head and the neck are in smooth transition. The hub comprises a ferrule 2, the connection assembly comprising an adjustment sleeve 3 and a fastening nut 4, wherein: a limiting retainer ring 21 which is integrally formed with the ferrule 2 is arranged in the ferrule 2 and between the two ends of the ferrule; the periphery of one end of the ferrule 2 is provided with an external thread; the outer diameter of the adjusting sleeve 3 is sequentially increased from one end to the other end; under the installation state, adjustment sleeve 3 suit is at the neck of paddle 1, and adjustment sleeve 3's minor diameter end (the minimum one end of suit sleeve 3 external diameter promptly) is towards spacing pier nose, and spacing pier nose is held by the external screw thread of lasso 2 and is stretched into in the lasso 2 and lean on with spacing retaining ring 21, and adjustment sleeve 3 supports with the inner wall of lasso 2 and supports, and fastening nut 4 suit is in the outside of lasso 2 and with the external screw thread threaded connection on the lasso 2.
By the way, the utility model discloses a set up adjusting sleeve 3 at 1 neck of paddle to the dimensional tolerance of 1 neck of tapering change adjustment paddle that utilizes adjusting sleeve 3, and utilize fastening nut 4 fixed with paddle 1 and 2 locks of lasso, thereby realize that paddle 1 is fixed with the propeller hub, and this connected mode can effectively improve the fastness and the reliability that paddle 1 and propeller hub are connected.
In addition, in this embodiment, the ferrule 2 is provided with at least two cutting grooves extending axially from one end close to the external thread to one end far away from the external thread, the cutting grooves are uniformly distributed around the circumference of the ferrule 2, and the arrangement of the structure enables the inner diameter of the end where the external thread of the ferrule 2 is located to have a movable deformation space, so that connection is facilitated and the connection firmness is further improved.
In this embodiment, the port edge of one end of the fastening nut 4 is provided with the thrust retaining ring 41 which is turned over towards the inner side thereof, and in the installation state, one end of the adjusting sleeve 3, which is far away from the limiting pier head, abuts against the thrust retaining ring 41, so that the adjusting sleeve 3 is prevented from moving in the working process, and the stability of the sleeving sleeve 3 in the working process is ensured. And in order to further increase the contact area between the thrust retaining ring 41 and the adjusting sleeve 3, the embodiment is provided with a flanging at the outer edge of the large-diameter end of the adjusting sleeve 3.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (5)
1. A variable pitch propeller blade and hub attachment apparatus comprising: blade (1) is connected with the propeller hub through coupling assembling, the blade root end of blade (1) includes the neck and is located the spacing pier nose of neck end department, the propeller hub includes lasso (2), coupling assembling is including adjusting sleeve pipe (3) and fastening nut (4), wherein:
a limiting retainer ring (21) which is integrally formed with the ferrule (2) is arranged in the ferrule and between the two ends of the ferrule; the periphery of one end of the ferrule (2) is provided with an external thread; the outer diameter of the adjusting sleeve (3) is sequentially increased from one end to the other end; under the installation state, adjustment sleeve pipe (3) suit is at the neck of paddle (1), and the path end of adjustment sleeve pipe (3) is towards spacing pier nose, and spacing pier nose is held by the external screw thread of lasso (2) and is stretched into in lasso (2) and support with spacing retaining ring (21) and lean on, and adjustment sleeve pipe (3) support with the inner wall of lasso (2) and support and lean on, and fastening nut (4) suit is in the outside of lasso (2) and with the external screw thread threaded connection on lasso (2).
2. A pitch propeller blade to hub connection according to claim 1, wherein the collar (2) is provided with at least two slots extending axially from an end close to its external thread to an end remote from the external thread, each slot being circumferentially distributed around the collar (2).
3. The device for connecting the blades and the hub of the variable pitch propeller according to claim 1, wherein a thrust retaining ring (41) which is turned over towards the inner side of the fastening nut (4) is arranged at the port edge of one end of the fastening nut, and in the installation state, one end of the adjusting sleeve (3) far away from the limiting pier head abuts against the thrust retaining ring (41).
4. A variable pitch propeller blade to hub connection as claimed in claim 3 wherein the adjustment sleeve (3) is provided with a flange at the outer rim of the large diameter end.
5. The variable pitch propeller blade to hub connection as recited in any one of claims 1 to 4, wherein the limiting pier head smoothly transitions into the neck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920743779.4U CN210027882U (en) | 2019-05-22 | 2019-05-22 | Variable pitch propeller blade and propeller hub connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920743779.4U CN210027882U (en) | 2019-05-22 | 2019-05-22 | Variable pitch propeller blade and propeller hub connecting device |
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| Publication Number | Publication Date |
|---|---|
| CN210027882U true CN210027882U (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920743779.4U Active CN210027882U (en) | 2019-05-22 | 2019-05-22 | Variable pitch propeller blade and propeller hub connecting device |
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| CN (1) | CN210027882U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127036A (en) * | 2019-05-22 | 2019-08-16 | 安徽卓尔航空科技有限公司 | A kind of variable-pitch propeller blade and propeller hub attachment device |
| CN112937837A (en) * | 2021-02-05 | 2021-06-11 | 安徽羲禾航空科技有限公司 | Variable pitch propeller |
-
2019
- 2019-05-22 CN CN201920743779.4U patent/CN210027882U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127036A (en) * | 2019-05-22 | 2019-08-16 | 安徽卓尔航空科技有限公司 | A kind of variable-pitch propeller blade and propeller hub attachment device |
| CN112937837A (en) * | 2021-02-05 | 2021-06-11 | 安徽羲禾航空科技有限公司 | Variable pitch propeller |
| CN112937837B (en) * | 2021-02-05 | 2024-01-05 | 安徽羲禾航空科技有限公司 | Pitch-variable propeller |
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