CN104149961A - Constant speed variable pitch straight wing all direction propeller - Google Patents
Constant speed variable pitch straight wing all direction propeller Download PDFInfo
- Publication number
- CN104149961A CN104149961A CN201410326630.8A CN201410326630A CN104149961A CN 104149961 A CN104149961 A CN 104149961A CN 201410326630 A CN201410326630 A CN 201410326630A CN 104149961 A CN104149961 A CN 104149961A
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- Prior art keywords
- gear
- blade
- constant speed
- sun
- straight wing
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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
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/04—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction
- B63H1/06—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades
- B63H1/08—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment
- B63H1/10—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment of Voith Schneider type, i.e. with blades extending axially from a disc-shaped rotary body
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/04—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction
- B63H1/06—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades
- B63H1/08—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment
- B63H1/10—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment of Voith Schneider type, i.e. with blades extending axially from a disc-shaped rotary body
- B63H2001/105—Propulsive elements directly acting on water of rotary type with rotation axis substantially at right angles to propulsive direction with adjustable vanes or blades with cyclic adjustment of Voith Schneider type, i.e. with blades extending axially from a disc-shaped rotary body with non-mechanical control of individual blades, e.g. electric or hydraulic control
Abstract
The invention discloses a constant speed variable pitch straight wing all direction propeller which comprises a main engine, an engine base, a main shaft, a rotating disc, a steering engine, a rudder shaft, a central gear, an intermediate gear, a blade gear, blades and blade shafts. The main engine drives a sun gear to rotate, the sun gear is meshed with a planet gear, the planet gear is meshed with a gear ring, the gear ring is meshed with a speed control gear, and the speed control gear is controlled through auxiliary power to rotate; the planet gear is in running fit with a fixing shaft on a planet carrier, the planet carrier is linked with the rotating disc through the main shaft, and the main shaft is in running fit with the engine base; the rudder shaft sequentially penetrates through the sun gear, the main shaft and the rotating disc, one end of the rudder shaft is linked with the steering engine, and the other end of the rudder shaft penetrates through the rotating disc and then is connected with the central gear in the rotating disc; the blade shafts are in running fit with the interior of the rotating disc, the blade shafts are parallel to the main shaft, the blade shafts are evenly distributed in the circumferential direction with the central gear as a center, the blade shafts penetrate through the blade gear and are fixedly connected to the blade gear, and the blade gear is meshed with the central gear through the intermediate gear; one end of each blade shaft is connected with the corresponding blade.
Description
Technical field
The invention belongs to propulsion of ship and manipulation technology field, particularly a kind ofly can be the in the situation that of main frame (diesel engine) invariablenes turning speed according to ship's navigation situation, adjust angle of rake output speed to change the straight wing all direction propeller of constant speed displacement of thrust size.
Background technology
Boats and ships adopt screw propeller-rudder system as propulsive control device mostly at present, and its propulsive control system consists of diesel engine, power-transfer clutch, drop-gear box, axle system, screw propeller and rudder for ship.Prop shaft is generally horizontality and arranges.The effective power that main frame sends is delivered on screw propeller by speed reduction gearing and axle system, makes screw propeller rotation produce hydrodynamic force, promotes boats and ships and advances.
Adopt the boats and ships of screw propeller-rudder gear mainly to have following problem:
1, boats and ships, the in the situation that of inward & outward and speed change navigation, need to control the size of propeller thrust by adjusting the rotating speed of diesel engine, thereby it are frequent to cause diesel engine speed to change, and fuel oil consumption and discharge increase, and component wear is serious.
2, the screw propeller power of competence exertion main frame in the situation that of ship design operating mode only.For the multi-state boats and ships such as towboat, fishing boat, auxiliary vessel, minesweeper and boats and ships, at loading, change under other larger operating modes and cannot give full play to main engine power.
3, diesel engine is many to the power transmission process temporary location equipment of screw propeller, and facility location is loose.
4, under the condition of equal-wattage, diameter of propeller is less, and the thrust of its generation is also little.Because the straight warp of screw propeller is subject to the restriction of drauht conventionally, so, concerning the boats and ships of river boat and drift-limited system, adopt the propulsion coefficient of screw propeller lower.
5, the method for employing adjustment diesel engine speed cannot accurately be controlled the size of propeller thrust, and the road-holding property of rudder for ship system is not good, so screw propeller-rudder system cannot precisely be controlled boats and ships.
Summary of the invention
The invention discloses the straight wing all direction propeller of a kind of boats and ships constant speed displacement, this propelling unit is provided with a set of accessory power system, and the propelling unit of employing accessory power system has the function of clutch, speed change and emergency power.
For achieving the above object, the present invention takes following technical scheme: the straight wing all direction propeller of a kind of constant speed displacement, comprise main frame, support, main shaft, rolling disc, steering wheel, rudderpost, sun gear, carrier gear, blade gear, blade and blade spindle, prime mover driven one sun wheel rotation, sun wheel engagement satellite gear, satellite gear engagement gear ring, gear ring engagement governor gear, governor gear is controlled by auxiliary power and is rotated; Anchor shaft normal-running fit in satellite gear and pinion carrier, pinion carrier is by main shaft and rolling disc interlock, main shaft and support normal-running fit; Rudderpost passes sun wheel, main shaft and rolling disc successively, rudderpost one end and steering wheel interlock, and the rudderpost other end is through the sun gear interlock after rolling disc and in rolling disc; In rolling disc, go back the several blade spindles of normal-running fit, blade spindle parallels with main shaft, and several blade spindles are along the circumferential direction evenly laid centered by sun gear, and blade spindle passes and affixed blade gear, and blade gear meshes by carrier gear and sun gear; One end of blade spindle is connected with blade.
Preferably, the output shaft of main frame is by plunging joint and angle gear interlock, and angle gear and the engagement of dish gear, coil gear and sun wheel interlock; Described rudderpost extends to sun wheel after coiling gear again.
Preferably, satellite gear has several, and several satellite gears are along the circumferential direction uniform.
Preferably, satellite gear has three.
Preferably, gear ring has interior teeth, outer teeth, and the interior teeth of gear ring are meshed with satellite gear, the outer teeth of gear ring and governor gear engagement.
Preferably, the 1/2 relation laying that the side of a ship line of blade is revolution corner in the different position of circumference according to rotation corner.
Preferably, auxiliary power is selected and is controlled motor or HM Hydraulic Motor.
Preferably, choice of main machine diesel engine, motor or HM Hydraulic Motor.
Preferably, gear ring is supported in support by gear ring support wheel or bearing.
Preferably, pinion carrier is supported in support by pinion carrier support wheel or bearing.
Adopt the angle of rake technical scheme of the present invention, diesel engine need not utilize the dynamic load of power-transfer clutch band after starting under no load, but utilizes the mode of auxiliary power synchronized operation to start diesel engine.Utilize auxiliary power unit also can in the situation that diesel engine speed is constant all the time, realize angle of rake speed changing function.
Propelling unit of the present invention has the advantages such as thrust is large, efficiency is high, variable-distance, high speed excellence, full circle swinging manipulation, and the propelling, manipulation, displacement, traction and the dynamic positioning device that are particularly suitable as various ships and ocean engineering thing are used.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment.
Fig. 2 is the speed-changing mechanism schematic diagram of a kind of embodiment.
In diagram, 1-main frame, 2-plunging joint, 3-angle gear, 4-dish gear, 5-sun wheel, 6-satellite gear, 7-pinion carrier, 8-gear ring, 9-governor gear, 10-auxiliary power, 11-gear ring support wheel, 12-pinion carrier support wheel, 13-support, 14-main shaft, 15-rolling disc, 16-steering wheel, 17-rudderpost, 18-sun gear, 19-carrier gear, 20-blade gear, 21-blade, 22-hull pedestal, 23-hull bottom, 24-blade spindle.
The specific embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is elaborated.
As shown in Figure 1, the straight wing all direction propeller of the present embodiment constant speed displacement comprises plunging joint 2, angle gear 3, dish gear 4, sun wheel 5, satellite gear 6, pinion carrier 7, gear ring 8, governor gear 9, auxiliary power 10 (control motor), gear ring support wheel 11, pinion carrier support wheel 12, support 13, main shaft 14, rolling disc 15, steering wheel 16, rudderpost 17, sun gear 18, carrier gear 19, blade gear 20, blade 21 and axle 24, the output shaft of main frame (diesel engine) 1 is by plunging joint 2 and angle gear 3 interlocks, angle gear 3 and 4 engagements of dish gear, dish gear 4 is connected and interlock with sun wheel 5.Thereby the output shaft of main frame (diesel engine) 1 can drive angle gear 3, dish gear 4 and sun wheel 5 rotations by plunging joint 2.
Sun wheel 5 and three satellite gear 6 engagements, three satellite gears 6 are along the circumferential direction uniform, three satellite gears 6 are all meshed with the interior teeth of gear ring 8, the outer teeth of gear ring 8 and governor gear 9 engagements, governor gear 9 is driven and is rotated by auxiliary power 10 (as controlled motor), therefore, gear ring 8 is controlled by governor gear 9 and auxiliary power 10 (control motor).On support 13, by vertical axis, gear ring support wheel 11, pinion carrier support wheel 12 are installed, the wheel cross section of gear ring support wheel 11, pinion carrier support wheel 12 is all [shape, the bottom transverse cross section of gear ring 8 is L-shaped, the wheel portion of gear ring support wheel 11 is stretched in one end of L shaped portion, but it does not affect the rolling of gear ring support wheel 11, and between the two vertically can not relative motion.The wheel portion of pinion carrier support wheel 12 stretches into the outer ring of pinion carrier 7, but it does not affect the rotation of pinion carrier 7, and between the two vertically can not relative motion.
Anchor shaft normal-running fit in satellite gear 6 and pinion carrier 7, pinion carrier 7 is passed through main shaft 14 and rolling disc 15 interlocks, main shaft 14 and support 13 normal-running fiies, support 13 is installed on hull pedestal 22.Dish gear 4, sun wheel 5, main shaft 14 and rolling disc 15 are all hollow shap along axis direction, rudderpost 17 is used for stretching through, rudderpost 17 is from top to down successively through logical portion in dish gear 4, sun wheel 5, main shaft 14 and rolling disc 15, rudderpost 17 upper ends and steering wheel 16 interlocks, rudderpost 17 lower ends are through sun gear 18 interlocks after the end face of rolling disc 15 and in rolling disc 15.In rolling disc 15, go back the several blade spindles 24 of normal-running fit, blade spindle 24 parallels with main shaft 14, several blade spindles 24 are along the circumferential direction evenly laid centered by sun gear 18, and blade spindle 24 passes and affixed blade gear 20, and blade gear 20 is by carrier gear 19 and sun gear 18 engagements.One end of blade spindle 24 extends (being that stretch out after rolling disc 15 lower end) in water and is connected with blade 21, and the relation layout that the side of a ship line of each blade 21 is revolution corner 1/2 in the different position of circumference according to rotation corner, to be formed on the consistent thrust of direction in water.
When satellite gear 6 revolution, drive pinion carrier 7 to drive rolling disc 15 rotations, and the blade spindle 22 of rolling disc 15 interior normal-running fiies is carrying out rotation by carrier gear 19 around sun gear 18 by blade gear 20 in revolution thereupon, make blade in water, form the thrust that direction is consistent.When steering wheel 16 drives sun gear 18 to rotate certain angle, its thrust direction also changes certain angle thereupon.Because sun gear 18 can rotate by 360 degree, therefore, angle of rake thrust can change within the scope of 360 degree.
Propelling unit clutch state principle of work: the output shaft of main frame (diesel engine) 1 drives angle gear 3, dish gear 4, sun wheel 5 rotations by plunging joint 2, gear ring 8 is controlled by governor gear 9 and auxiliary power (control motor) 10 reverse sync rotations.Now, satellite gear 6 original place rotation under the combined action of sun wheel 5 and gear ring 8, because pinion carrier 7 and rolling disc 15 do not rotate and do not produce moment of torsion, diesel engine can complete smoothly and starts and reach idling mode or rated speed of rotation, and now angle of rake rotating speed and thrust are zero.
Angle of rake starting and smooth operation: the output shaft of main frame (diesel engine) 1 drives angle gear 3, dish gear 4, sun wheel 5 rotations by plunging joint 2 under rated speed of rotation.Now, auxiliary power (control motor) 10, governor gear 9, gear ring 8 reduce speed now until stop the rotation, satellite gear 6 enters along gear ring 8 and rolls and promote pinion carrier 7 and rolling disc 15 accelerates to rotate until increase to rated speed of rotation from original place rotation gradually under the combined action of sun wheel 5 and gear ring 8, thereby make propelling unit in the situation that input speed is constant, thrust increases to maximum and promotes boats and ships from zero and moves with maximum speed, and propelling unit is auxiliary power consumed energy not when smooth operation.
Angle of rake speed regulation process: boats and ships can frequently carry out speed change navigation when limiting navigation channel and inward & outward operation, now need often to adjust angle of rake working speed.This propelling unit is in the situation that diesel engine speed is constant, to carry out speed governing, and its principle of work is: the output shaft of main frame (diesel engine) 1 drives angle gear 3, dish gear 4, sun wheel 5 rotations by plunging joint 2 under rated speed of rotation.According to ship's navigation situation, adjust the rotating speed of gear ring 8, satellite gear 6 has changed the rotating speed of its revolution and pinion carrier 7, rolling disc 15 under the combined action of sun wheel 5 and gear ring 8, thereby has guaranteed that propelling unit changes rapidly the boats and ships required thrust of advancing in the situation that input speed is constant.
The adjustment of propelling unit operation point under different operating modes: for towboat, fishing boat and the ship of war, boats and ships have multiple running working condition.Now, propelling unit can reselect suitable operation point to give full play to main engine power according to different operating modes, save the energy, its principle of work is: the output shaft of main frame (diesel engine) 1 drives angle gear 3 by plunging joint 2 under rated speed of rotation, dish gear 4, sun wheel 5 rotations, gear ring 8 is controlled by governor gear 9 and auxiliary power (control motor) 10 and adjusts its rotating speed and turn to according to vessel motion state, satellite gear 6 promotes pinion carrier 7 and the rotation speed operation of rolling disc 15 to set under the combined action of sun wheel 5 and gear ring 8, reach the object that changes blade hydrodynamic force speed polygon and hydrodynamic pitch angle (being equivalent to roll adjustment state), thereby make the propelling unit required maximum thrust of advancing after diesel engine power and rotating speed provide constant in the situation that boats and ships to change operating mode.Especially, when gear ring 8 and sun wheel 5 turn to when identical, propelling unit is Afterburning condition, and now tractive power is diesel engine 1 and the power sum of auxiliary power (control motor) 10, and boats and ships can obtain the higher speed of a ship or plane thus.
Auxiliary power driving condition: boats and ships can adopt auxiliary power to drive propelling unit under special circumstances, its principle of work is: Shutdown Hosts (diesel engine) 1, the rotating speed that makes sun wheel 5 is zero, gear ring 8 is driven by governor gear 9 by auxiliary power (control motor) 10, thereby satellite gear 6 rolls to revolve round the sun and promote pinion carrier 7 and rolling disc 15 rotations along sun wheel 5 and produces the boats and ships required thrust of advancing under the effect of gear ring 8.
The present invention can make marine main engine (diesel engine) under rated speed of rotation, move all the time, greatly reduced wearing and tearing, fuel oil consumption and the discharge of boats and ships diesel engine part in inward & outward, during speed change navigation.
The present invention can guarantee that multi-state boats and ships propelling unit when different operational configuration all can fully absorb the power of main frame and produce maximum thrust.
The present invention has improved propulsion coefficient and road-holding property when boats and ships navigate by water in restricted navigation channel.
The present invention has save power-transfer clutch, gear case, axle system and the rudder for ship device of propeller propulsion system, has higher device integration, and propulsion system is easy for installation, layout is succinct.
The present invention can precisely adjust the size and Orientation of propeller thrust by controlling motor and steering wheel, can be used as the actuating unit of performance-oriented boats and ships and ocean engineering dynamic positioning.
This propelling unit has auxiliary power, and its auxiliary power can independent operating, also can with the common horsepower output of diesel engine, when urgent, also can be used as emergency power and use.Auxiliary power has not only improved the sea survival ability of boats and ships, and boats and ships also can obtain the higher speed of a ship or plane if desired.
Those of ordinary skill in the art will be appreciated that, the present invention is not limited to above-described embodiment, for example: the quantity of satellite gear 6 can be set to one or more; Gear ring 8 can all arrange flute profile or only in inner side, arrange inside and outside, and correspondingly governor gear 9 is also arranged in outside or inner side; Gear ring 8 and pinion carrier support wheel 12 can adopt bearing arrangement; Main frame (diesel engine) 1 can adopt motor, HM Hydraulic Motor or other power plants, can also save accordingly the parts such as angle gear 3, dish gear 4; Auxiliary power 10 can adopt motor, HM Hydraulic Motor or other controlled power plants; Etc., to conversion of the present invention, modification, all fall into protection scope of the present invention.
Claims (10)
1. the straight wing all direction propeller of constant speed displacement, comprise main frame, support, main shaft, rolling disc, steering wheel, rudderpost, sun gear, carrier gear, blade gear, blade and blade spindle, it is characterized in that: described prime mover driven one sun wheel rotation, sun wheel engagement satellite gear, satellite gear engagement gear ring, gear ring engagement governor gear, governor gear is controlled by auxiliary power and is rotated; Anchor shaft normal-running fit in satellite gear and pinion carrier, pinion carrier is by main shaft and rolling disc interlock, main shaft and support normal-running fit; Rudderpost passes sun wheel, main shaft and rolling disc successively, rudderpost one end and steering wheel interlock, and the rudderpost other end is through the sun gear interlock after rolling disc and in rolling disc; In rolling disc, go back the several blade spindles of normal-running fit, blade spindle parallels with main shaft, and several blade spindles are along the circumferential direction evenly laid centered by sun gear, and blade spindle passes and affixed blade gear, and blade gear meshes by carrier gear and sun gear; One end of blade spindle is connected with blade.
2. the straight wing all direction propeller of constant speed displacement as claimed in claim 1, is characterized in that: the output shaft of described main frame is by plunging joint and angle gear interlock, and angle gear and the engagement of dish gear, coil gear and sun wheel interlock; Described rudderpost extends to sun wheel after coiling gear again.
3. the straight wing all direction propeller of constant speed displacement as claimed in claim 1, is characterized in that: described satellite gear has several, and several satellite gears are along the circumferential direction uniform.
4. the straight wing all direction propeller of constant speed displacement as claimed in claim 3, is characterized in that: described satellite gear has three.
5. the straight wing all direction propeller of constant speed displacement as described in claim 1 or 3 or 4, is characterized in that: described gear ring has interior teeth, outer teeth, and the interior teeth of gear ring are meshed with satellite gear, the outer teeth of gear ring and governor gear engagement.
6. the straight wing all direction propeller of constant speed displacement as claimed in claim 1, is characterized in that: the 1/2 relation laying that the side of a ship line of described blade is revolution corner in the different position of circumference according to rotation corner.
7. the straight wing all direction propeller of constant speed displacement as claimed in claim 1, is characterized in that: described auxiliary power is selected and controlled motor or HM Hydraulic Motor.
8. the straight wing all direction propeller of constant speed displacement as claimed in claim 1, is characterized in that: described choice of main machine diesel engine, motor or HM Hydraulic Motor.
9. the straight wing all direction propeller of constant speed displacement as described in claim 1-4,6-8 any one, is characterized in that: described gear ring is supported in support by gear ring support wheel or bearing.
10. the straight wing all direction propeller of constant speed displacement as described in claim 1-4,6-8 any one, is characterized in that: described pinion carrier is supported in support by pinion carrier support wheel or bearing.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410326630.8A CN104149961B (en) | 2014-07-10 | 2014-07-10 | A kind of straight wing all direction propeller of constant speed displacement |
| EP15818921.7A EP3168136B1 (en) | 2014-07-10 | 2015-07-06 | Constant-speed variable-pitch voith-schneider omni-directional propeller |
| PCT/CN2015/083361 WO2016004836A1 (en) | 2014-07-10 | 2015-07-06 | Constant-speed variable-pitch voith-schneider omni-directional propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410326630.8A CN104149961B (en) | 2014-07-10 | 2014-07-10 | A kind of straight wing all direction propeller of constant speed displacement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104149961A true CN104149961A (en) | 2014-11-19 |
| CN104149961B CN104149961B (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410326630.8A Active CN104149961B (en) | 2014-07-10 | 2014-07-10 | A kind of straight wing all direction propeller of constant speed displacement |
Country Status (1)
| Country | Link |
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| CN (1) | CN104149961B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016004836A1 (en) * | 2014-07-10 | 2016-01-14 | 浙江风神海洋工程技术有限公司 | Constant-speed variable-pitch voith-schneider omni-directional propeller |
| CN109649611A (en) * | 2018-12-25 | 2019-04-19 | 中国船舶重工集团公司第七〇九研究所 | Planetary pump-jet propulsor |
| CN110525625A (en) * | 2019-07-24 | 2019-12-03 | 徐亮亮 | Intelligence promotes, positions and subtract the ship power system and its method of operating that shake |
| CN111038695A (en) * | 2019-12-04 | 2020-04-21 | 江西洪都航空工业集团有限责任公司 | Cross-medium aircraft power device |
| CN112977783A (en) * | 2021-03-26 | 2021-06-18 | 吉林大学 | Eccentric control mechanism of cycloid propeller |
| CN114476024A (en) * | 2022-02-21 | 2022-05-13 | 中国航天科工集团第二研究院 | Propeller pitch angle adjusting device and using method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016004836A1 (en) * | 2014-07-10 | 2016-01-14 | 浙江风神海洋工程技术有限公司 | Constant-speed variable-pitch voith-schneider omni-directional propeller |
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| CN110525625A (en) * | 2019-07-24 | 2019-12-03 | 徐亮亮 | Intelligence promotes, positions and subtract the ship power system and its method of operating that shake |
| CN111038695A (en) * | 2019-12-04 | 2020-04-21 | 江西洪都航空工业集团有限责任公司 | Cross-medium aircraft power device |
| CN112977783A (en) * | 2021-03-26 | 2021-06-18 | 吉林大学 | Eccentric control mechanism of cycloid propeller |
| CN114476024A (en) * | 2022-02-21 | 2022-05-13 | 中国航天科工集团第二研究院 | Propeller pitch angle adjusting device and using method |
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| Publication number | Publication date |
|---|---|
| CN104149961B (en) | 2016-06-29 |
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