CN112478136B - Connecting device for blade and hub with metal paddle handle - Google Patents
Connecting device for blade and hub with metal paddle handle Download PDFInfo
- Publication number
- CN112478136B CN112478136B CN202011411427.2A CN202011411427A CN112478136B CN 112478136 B CN112478136 B CN 112478136B CN 202011411427 A CN202011411427 A CN 202011411427A CN 112478136 B CN112478136 B CN 112478136B
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- CN
- China
- Prior art keywords
- blade
- hub
- shaft
- metal
- paddle
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/16—Blades
- B64C11/20—Constructional features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/02—Hub construction
Abstract
A paddle shaft (2) and a paddle (3) with a metal paddle handle are fixed through a stud pin (4), are sleeved and positioned with a hub (1) through a rotatable end face supporting piece and rotate relative to the hub (1), the axial positions of the paddle shaft (2), the paddle (3) with the metal paddle handle, the rotatable end face supporting piece and the hub (1) are fixed under the axial tensioning of a cushion block (8) and a locking piece (9), a sealing ring (7) is arranged in the device to seal the inner cavity of the hub (1), the effect on the paddle (3) caused by the fact that the gravity center deviates from the self-rotation axis of the paddle (3) can be reduced under the centrifugal balancing of a balancing block (10), and finally the paddle (3) with the metal paddle handle can be inserted into the hub (1) to be installed and fixed.
Description
Technical Field
The invention belongs to the technical field of aviation equipment, and relates to a connecting device of a blade with a metal paddle handle and a paddle hub.
Background
The propeller is an important component of a medium-low speed aircraft, the paddle handle and the paddle of most propellers in the current market are made of carbon fiber composite materials, although the strength is high, the paddle handle has no protection measures, the metal propeller hub can repeatedly extrude the paddle handle to cause surface damage in the variable pitch process, the rotation precision and the service life are further influenced, and more serious safety accidents can be caused. In addition, the propeller blade often can lead to the damage because of outside grit or damp and hot environment in the use, often need include that the variable pitch mechanism changes whole propeller hub in the change process to adjust the pitch angle of paddle proofreading again, the propeller maintenance efficiency is poor.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, the connecting device for the propeller blade with the metal propeller handle and the propeller hub is provided, the direct relative friction motion of the composite material propeller blade and the propeller hub can be avoided, the mode that the propeller blade with the metal propeller handle is fixedly butted with the propeller root shaft is adopted, the strength of the propeller handle of the propeller is improved, the maintenance efficiency of the propeller is improved, and the use safety and reliability are guaranteed.
The purpose of the invention is realized by the following technical scheme:
a connecting device of a blade with a metal blade handle and a hub comprises the hub, a blade shaft, the blade with the metal blade handle, a rotatable end surface supporting piece, a cushion block, a locking piece and a balancing piece;
the paddle root shaft is fixedly connected with a paddle with a metal paddle handle; the propeller root shaft is sleeved in the propeller hub; the rotatable end face support is positioned between the hub and the root shaft, so that the root shaft and the blade with the metal paddle handle can rotate relative to the hub, the position between the hub and the root shaft is relatively fixed through the rotatable end face support, the cushion block and the locking piece, wherein the cushion block is positioned between the locking piece and the hub, and the locking piece is tensioned through adjusting the thickness of the cushion block; sealing the inner cavity of the propeller hub by using a sealing ring;
the balancing block is used for carrying out centrifugal balancing on the paddle with the metal paddle handle.
The connecting device of the blade with the metal paddle handle and the paddle hub preferably further comprises a stud pin, and the paddle root shaft and the blade with the metal paddle handle are fixedly connected through the stud pin.
In the above connecting device of the blade with the metal shaft and the hub, preferably, the rotatable end face support comprises a rotatable end face support I and a rotatable end face support II, wherein the rotatable end face support II is closer to the blade with the metal shaft; the first rotatable end face support is arranged between the hub and the propeller root shaft and then is clamped by the inner grooves of the hub and the propeller root shaft.
Preferably, the sealing ring is a built-in sealing ring and is positioned in a sealing groove arranged on the hub or the root shaft.
Above-mentioned take paddle and the connecting device of propeller hub of metal oar handle, preferably, the cushion adopts high rigidity self-lubricating material to make.
The connecting device of the blade with the metal blade handle and the hub preferably further comprises a shifting fork shaft fixedly connected with the blade root shaft, the angle value of the shifting fork shaft relative to the positioning hole of the blade with the metal blade handle is fixed, and the shifting fork shaft drives the blade root shaft and the blade with the metal blade handle to rotate in a reciprocating mode relative to the hub under the action of external force.
Preferably, the propeller shaft and the propeller blade with the metal propeller handle are positioned in a concave-convex fit manner.
Preferably, the propeller shaft and the blade with the metal propeller handle are positioned in a taper fit mode.
Preferably, the cushion block, the locking member and the balancing block are simultaneously arranged on the propeller shaft or simultaneously arranged on the blade with the metal propeller handle.
In the above connecting device for the blade with the metal handle and the hub, preferably, the maximum diameter of the propeller shaft is not greater than the minimum diameter of the hub cavity in which the hub and the propeller shaft are sleeved, so that the blade with the metal handle and the propeller shaft can be sleeved together in the cavity of the hub along the axial direction.
The connecting device of the blade with the metal paddle handle and the hub preferably has the advantages that the weight and the gravity center position of the leveling block are matched with the rotation axis of the blade with the metal paddle handle along with the weight and the gravity center position of the blade with the metal paddle handle.
Compared with the prior art, the invention has the following beneficial effects:
1. through the design of the metal paddle handle capable of being in concave-convex butt joint, the paddle can be replaced very conveniently without adjusting the paddle pitch angle again, the maintenance efficiency of the paddle is improved, and the strength and the use precision of the paddle handle are improved.
2. The two rotatable end face supporting pieces are designed to respectively support and transfer the axial direction and the radial direction of the blade, so that the blade root shaft and the blade can be inserted into the hub and sleeved and mounted, and the sealing performance and the rotating precision of the hub are guaranteed.
3. Through the design of the balancing block, the effect of centrifugal moment and the like on the propeller blade caused by the fact that the center of gravity deviates from the rotation axis of the propeller blade can be reduced under the centrifugal balancing of the rotation of the propeller, and the influence of vibration and the like in the rotation process is reduced.
Drawings
Fig. 1 is a first embodiment (partially cut away) of a connection device of a propeller blade with a metal shaft and a propeller hub according to the present invention.
Fig. 2 is a second embodiment (partially sectional view) of the connection device of the propeller blade with the metal shaft and the propeller hub, which is provided by the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A connecting device of a blade with a metal blade handle and a hub comprises the hub 1, a blade root shaft 2, a blade 3 with a metal blade handle, a stud pin 4, a rotatable end face supporting piece, a cushion block 8, a locking piece 9 and a balancing piece 10;
the paddle root shaft 2 is fixedly connected with a paddle blade 3 with a metal paddle handle; the propeller root shaft 2 is sleeved in the propeller hub 1; the rotatable end face bearing is positioned between the hub 1 and the root shaft 2, so that the root shaft 2 and the blade 3 with the metal paddle handle can rotate relative to the hub 1, the position between the hub 1 and the root shaft 2 is relatively fixed through the rotatable end face bearing, a cushion block 8 and a locking block 9, wherein the cushion block 8 is positioned between the locking block 9 and the hub 1, and the locking block 9 is tensioned through adjusting the thickness of the cushion block 8; sealing the inner cavity of the propeller hub 1 by using a sealing ring;
the balancing block 10 is used for centrifugal balancing of the blade 3 with a metal paddle shaft.
In a preferred scheme of the invention, the propeller shaft 2 and the propeller blade 3 with the metal propeller handle are fixedly connected through a stud pin 4.
As a preferred aspect of the present invention, the rotatable end face support comprises a rotatable end face support one 5, a rotatable end face support two 6, wherein the rotatable end face support two 6 is closer to the paddle with metal paddle handle 3; the hub 1 and the root shaft 2 are provided with inner grooves at the mounting position of the first rotatable end face bearing 5, and the first rotatable end face bearing 5 is clamped by the inner grooves of the hub 1 and the root shaft 2 after being mounted between the hub 1 and the root shaft 2.
In a preferred embodiment of the present invention, the sealing ring is a built-in sealing ring 7, and is located in a sealing groove provided in the hub 1 or the root shaft 2.
As a preferred scheme of the invention, the cushion block 8 is made of a high-rigidity self-lubricating material.
As a preferable scheme of the present invention, the present invention further comprises a declutch shift shaft 11 fixedly connected to the paddle root shaft 2, an angle value of the declutch shift shaft 11 relative to a positioning hole of the paddle blade 3 with the metal paddle handle is fixed, and the declutch shift shaft 11 drives the paddle root shaft 2 and the paddle blade 3 with the metal paddle handle to perform reciprocating rotation relative to the hub 1 under the action of an external force.
As a preferred scheme of the invention, the propeller root shaft 2 and the propeller blade 3 with the metal propeller handle are positioned in a concave-convex fit mode.
As a preferable scheme of the invention, the propeller shaft 2 and the propeller blade 3 with the metal propeller handle are positioned in a taper fit mode.
As a preferred solution of the invention, the spacer 8, the locking element 9 and the balancing element 10 are placed simultaneously on the shaft 2 of the blade or simultaneously on the blade 3 with the metal blade shaft.
In a preferred embodiment of the present invention, the maximum diameter of the root shaft 2 is not greater than the minimum diameter of the inner cavity of the hub 1 in which the hub 1 and the root shaft 2 are fitted, so that the blade 3 with a metal blade shaft can be fitted in the inner cavity of the hub 1 along with the root shaft 2 in the axial direction.
As a preferable aspect of the present invention, the weight and the center of gravity position of the trim piece 10 are matched with the rotation axis of the blade 3 with a metal paddle handle according to the weight and the center of gravity position of the blade 3 with a metal paddle handle.
Further:
a connecting device of a propeller blade with a metal propeller handle and a propeller hub comprises the propeller hub 1, a propeller root shaft 2, the propeller blade 3 with the metal propeller handle, a stud pin 4, a first rotatable end face supporting piece 5, a second rotatable end face supporting piece 5, a built-in sealing ring 7, a cushion block 8, a locking piece 9, a balancing block 10 and a shifting fork shaft 11. The propeller shaft 2 and the blade 3 with the metal propeller handle are fixed through a stud pin 4, are sleeved and positioned with the propeller hub 1 through a rotatable end face supporting piece I5 and a rotatable end face supporting piece II 5, and rotate relative to the propeller hub 1, the axial positions of the propeller shaft 2, the blade 3 with the metal propeller handle, the rotatable end face supporting pieces I5 and 6 and the propeller hub 1 are fixed under the axial tensioning of a cushion block 8 and a locking piece 9, the inner cavity of the propeller hub 1 is sealed through a built-in sealing ring 7, and the effect of centrifugal moment and the like generated by gravity center deviation from the rotation axis of the blade 3 on the blade 3 can be reduced under the centrifugal balancing of a balancing block 10. The shifting fork shaft 11 is fixedly connected with the propeller root shaft 2, the angle value of the shifting fork shaft relative to the positioning hole of the blade 3 with the metal propeller handle is fixed, and the propeller root shaft 2 and the blade 3 with the metal propeller handle are driven to rotate in a reciprocating mode relative to the propeller hub 1 under the action of external force.
The metal paddle handle end of the paddle 3 with the metal paddle handle is positioned with the paddle root shaft 2 in a concave-convex fit mode, and a cone fit mode is optimized. The maximum diameter of the propeller shaft 2 is not larger than the minimum diameter of an inner cavity formed by sleeving the propeller hub 1 and the propeller shaft 2, and the requirement that the blades 3 with metal propeller handles are sleeved in the inner cavity of the propeller hub 1 along the axial direction together with the propeller shaft 2 is met. The sealing rings 6 are arranged in sealing grooves arranged on the hub 1 or the root shaft 2, and the number of the sealing rings is not limited. The weight and the position of the center of gravity of the trim block 10 match with the position and weight of the center of gravity of the blade 3 with respect to the axis of rotation of the blade 3. The thickness of the cushion block 8 is adjusted according to the positioning tightness of the propeller shaft 2 in the direction of the rotation axis of the propeller blade 3, and a high-rigidity self-lubricating material (POM material or PEEK material) is preferably selected.
When the center of gravity deviation of the paddle 3 with the metal paddle handle has little influence, the cushion block 8, the locking member 9 and the balancing block 10 are preferably arranged at the paddle root shaft 2, as shown in fig. 1; but instead is preferably placed at the paddle 3 with a metal paddle shaft as shown in figure 2. The blade 3 with the metal paddle handle can be inserted into the hub 1 along with the paddle root shaft 2, and is embedded into the rotatable end face support 5 for positioning and bearing the centrifugal force applied to the blade 3 with the metal paddle handle.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (10)
1. A connecting device of a blade with a metal blade handle and a hub is characterized by comprising the hub (1), a blade root shaft (2), a blade (3) with the metal blade handle, a rotatable end face supporting piece, a cushion block (8), a locking piece (9) and a balancing block (10);
the paddle root shaft (2) is fixedly connected with the paddle (3) with the metal paddle handle; the propeller root shaft (2) is sleeved in the propeller hub (1); the rotatable end face bearing is positioned between the hub (1) and the propeller root shaft (2), so that the propeller root shaft (2) and the blade (3) with the metal propeller handle can rotate relative to the hub (1), the position between the hub (1) and the propeller root shaft (2) is relatively fixed through the rotatable end face bearing, a cushion block (8) and a locking piece (9), wherein the cushion block (8) is positioned between the locking piece (9) and the hub (1), and the locking piece (9) is tensioned through adjusting the thickness of the cushion block (8); the inner cavity of the propeller hub (1) is sealed by a sealing ring;
the balancing block (10) is used for carrying out centrifugal balancing on the paddle (3) with the metal paddle handle;
the rotatable end face support comprises a first rotatable end face support (5) and a second rotatable end face support (6), wherein the second rotatable end face support (6) is closer to the paddle (3) with the metal paddle handle; the hub (1) and the propeller root shaft (2) are provided with inner grooves at the mounting position of the first rotatable end face bearing (5), and the first rotatable end face bearing (5) is clamped by the inner grooves of the hub (1) and the propeller root shaft (2) after being mounted between the hub (1) and the propeller root shaft (2).
2. The connecting device of the blade with the metal paddle handle and the hub as claimed in claim 1, characterized by further comprising a stud pin (4), wherein the paddle root shaft (2) and the blade with the metal paddle handle (3) are fixedly connected through the stud pin (4).
3. A device for connecting a blade with a metal shaft to a hub according to claim 1, characterized in that said sealing ring is a built-in sealing ring (7) located in a sealing groove provided in the hub (1) or in the root shaft (2).
4. A device for connecting a blade to a hub with a metal shaft according to claim 1, characterised in that the spacer (8) is made of a highly rigid self-lubricating material.
5. The connecting device of the blade with the metal blade handle and the hub as claimed in claim 1, further comprising a shifting fork shaft (11) fixedly connected with the blade root shaft (2), wherein the angle value of the shifting fork shaft (11) relative to the positioning hole of the blade (3) with the metal blade handle is fixed, and the shifting fork shaft (11) drives the blade root shaft (2) and the blade (3) with the metal blade handle to rotate back and forth relative to the hub (1) under the action of external force.
6. The connecting device of the blade with the metal paddle handle and the paddle hub as claimed in claim 1, wherein the paddle root shaft (2) and the blade with the metal paddle handle (3) are positioned in a concave-convex fit manner.
7. A device for connecting a blade with a metal shaft to a hub according to claim 6, characterized in that the shaft (2) of the blade root and the blade with a metal shaft (3) are positioned in a tapered fit.
8. A device for connecting a blade with a metal shaft to a hub according to claim 4, characterized in that the spacer (8), the locking element (9) and the balancing element (10) are placed on the blade shaft (2) or on the blade with a metal shaft (3) simultaneously.
9. A connecting device of a blade and a hub with a metal blade handle according to any one of claims 1 to 8, characterized in that the maximum diameter of the blade root shaft (2) is not larger than the minimum diameter of the inner cavity of the hub (1) where the hub (1) and the blade root shaft (2) are sleeved, so that the blade (3) with the metal blade handle can be sleeved in the inner cavity of the hub (1) along the axial direction together with the blade root shaft (2).
10. A device for connecting a blade with a metal shaft to a hub according to any one of claims 1 to 8, characterized in that the weight and the position of the center of gravity of the leveling block (10) are matched with the rotation axis of the blade with a metal shaft (3) along with the weight and the position of the center of gravity of the blade with a metal shaft (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411427.2A CN112478136B (en) | 2020-12-03 | 2020-12-03 | Connecting device for blade and hub with metal paddle handle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411427.2A CN112478136B (en) | 2020-12-03 | 2020-12-03 | Connecting device for blade and hub with metal paddle handle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112478136A CN112478136A (en) | 2021-03-12 |
| CN112478136B true CN112478136B (en) | 2022-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011411427.2A Active CN112478136B (en) | 2020-12-03 | 2020-12-03 | Connecting device for blade and hub with metal paddle handle |
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| Country | Link |
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| CN (1) | CN112478136B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114313195B (en) * | 2022-03-15 | 2022-07-08 | 山东省科学院海洋仪器仪表研究所 | Shaft end self-locking fastening device of ship propeller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3952601A (en) * | 1974-12-18 | 1976-04-27 | United Technologies Corporation | Helicopter rotor blade balancing method |
| WO2008032125A2 (en) * | 2006-09-15 | 2008-03-20 | Yellowfin Limited | Marine propulsion and constructional details thereof |
| CN210284590U (en) * | 2019-07-25 | 2020-04-10 | 埃游科技（深圳）有限公司 | Automatic torque-changing mechanism of propeller |
| CN111688915A (en) * | 2020-07-23 | 2020-09-22 | 安阳市豪克航空科技有限公司 | Can improve screw of pitch adjustment precision |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203186576U (en) * | 2012-12-21 | 2013-09-11 | 中国直升机设计研究所 | Novel structure of composite material propeller shank of helicopter |
| US9889925B2 (en) * | 2014-09-22 | 2018-02-13 | The Boeing Company | Single blade propeller with variable pitch |
| CN105947194A (en) * | 2016-06-17 | 2016-09-21 | 王伟 | Pitch-regulated mechanism of propeller and aircraft provided with mechanism |
| CN206278269U (en) * | 2016-11-30 | 2017-06-27 | 中国直升机设计研究所 | A kind of new configuration of propeller shank |
| US20200140073A1 (en) * | 2018-11-05 | 2020-05-07 | Amazon Technologies, Inc. | Passive variable pitch propellers |
| CN110254694A (en) * | 2019-07-25 | 2019-09-20 | 埃游科技（深圳）有限公司 | A kind of propeller automatic torque-changing mechanism |
| CN211592911U (en) * | 2019-11-25 | 2020-09-29 | 西安空天能源动力智能制造研究院有限公司 | Propeller variable pitch device |
-
2020
- 2020-12-03 CN CN202011411427.2A patent/CN112478136B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3952601A (en) * | 1974-12-18 | 1976-04-27 | United Technologies Corporation | Helicopter rotor blade balancing method |
| WO2008032125A2 (en) * | 2006-09-15 | 2008-03-20 | Yellowfin Limited | Marine propulsion and constructional details thereof |
| CN210284590U (en) * | 2019-07-25 | 2020-04-10 | 埃游科技（深圳）有限公司 | Automatic torque-changing mechanism of propeller |
| CN111688915A (en) * | 2020-07-23 | 2020-09-22 | 安阳市豪克航空科技有限公司 | Can improve screw of pitch adjustment precision |
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| Publication number | Publication date |
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| CN112478136A (en) | 2021-03-12 |
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