CN102556312B - Screw pitch feedback rod device for adjustable-pitch full-rotation propeller - Google Patents
Screw pitch feedback rod device for adjustable-pitch full-rotation propeller Download PDFInfo
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- CN102556312B CN102556312B CN201210004521.5A CN201210004521A CN102556312B CN 102556312 B CN102556312 B CN 102556312B CN 201210004521 A CN201210004521 A CN 201210004521A CN 102556312 B CN102556312 B CN 102556312B
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- feedback
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Abstract
A screw pitch feedback rod device for an adjustable-pitch full-rotation propeller comprises an upper feedback rod device and a lower feedback rod device, wherein the upper feedback rod device is arranged in a rotation unit, and the lower feedback rod device is arranged in a propelling unit. The upper feedback rod device comprises an upper rod cavity, an upper connecting rod, a copper bush, a ball seat, a spring, a retaining ring and steel balls, wherein the lower end of the upper connecting rod is connected with the ball seat sliding along an inner cavity of the copper bush, the side wall of the ball seat is provided with through holes, the steel balls are arranged in the through holes, the spring and the retaining ring are arranged in a lower ball seat cavity in the ball seat, the lower end of the retaining ring contacts with positions laterally above the steel balls, and the steel balls are jointly limited by the inner cavity of the copper bush, the lower end of the retaining ring and the through holes. The lower feedback rod device comprises a lower rod cavity, a lower connecting rod and a lower rod head, wherein the lower rod head comprises an upper head portion and a lower head portion, and the top end of the upper head portion is correspondingly matched with the lower end of the retaining ring. By the aid of the screw pitch feedback rod device in the design, automatic connection and disconnection are achieved, operating difficulty is reduced, and precision of screw pitch feedback signals can be guaranteed.
Description
Technical field
The present invention relates to a kind of pitch feedback rod device, relate in particular to a kind of screw pitch feedback rod device for adjustable-pitch full-rotation propeller, be specifically applicable to realize being certainly dynamically connected and throwing off of feedback rod, and can guarantee the precision of pitch feedback signal.
Background technology
Adjustable pitch all-direction propeller is a kind of novel propeller device for vessel, and its decapacitation produces outside thrust as common propelling unit, can also within the scope of 360 °, change thrust direction, therefore have the function of propelling unit and steering wheel concurrently, can significantly improve the handling of boats and ships.The base portion of adjustable pitch all-direction propeller is generally divided into turning unit and propulsion unit, between Unit two, by flange, connect, thereby in adjustable pitch all-direction propeller, the feedback rod of pitch feedback mechanism is also divided into two sections at flange, be feedback rod device and lower feedback rod device, wherein, the lower feedback rod device that is positioned at propulsion unit inside is responsible for the detection of pitch, and the upper feedback rod device that is positioned at turning unit inside is responsible for transmitting mechanical signal.
Propulsion unit and turning unit are in the process of Assembly &Disassembly, the feedback rod that is used for transmitting the mechanical feedback signal of pitch also must connect thereupon and disconnect, because the stroke of feedback mechanism is limited, can not be before propelling unit flange and the installation of axis of revolution flange, in the larger space of relative distance, connect and dismounting feedback mechanism, this just requires the feedback mechanism at this place can realize from being dynamically connected, the feedback rod that is divided into two sections will possess from being dynamically connected and the function of throwing off, thereby convenient operation, in addition, feedback rod also must guarantee that after being certainly dynamically connected the gap of vertical direction is as far as possible little, to guarantee the precision of pitch feedback signal.
Chinese patent Granted publication number is CN201999189U, Granted publication day is that the utility model patent on October 5th, 2011 discloses a kind of thread pitch feedback device, comprise sleeve pipe, case in and magnetic displacement transducer, described cased lower end is provided with the through hole that the pilot bar for side thruster stretches into, described cased upper end is fixedly connected with the lower end of upper sleeve pipe, the upper end of described pilot bar is fixedly connected with pipe link, the upper end of described pipe link is provided with spring mounting seat, spring housing is contained on described pipe link, the upper end of described spring withstands on the lower end of described spring mounting seat, the lower end of described spring withstands on described cased intracavity bottom, described spring mounting seat is sleeved on the inwall of sleeve pipe slidably, described magnetic displacement transducer comprises magnet and in order to the slide bar of induced magnet position, described magnet is fixedly connected with described spring mounting seat, the top of described magnet and pipe link all has cavity, the top of described magnet and pipe link is sleeved on described slide bar slidably.Although this utility model can provide a kind of simple in structure, minimizing takes up room, reliability is good thread pitch feedback device, but it does not possess from being dynamically connected and the function of throwing off, thereby is not suitable for the adjustable pitch all-direction propeller that comprises turning unit, propulsion unit.
Summary of the invention
The object of the invention is to overcome not possessing from being dynamically connected and defect and the problem of throwing off function of existing in prior art, provide a kind of and possess from being dynamically connected and the screw pitch feedback rod device for adjustable-pitch full-rotation propeller of throwing off function.
For realizing above object, technical solution of the present invention is: a kind of screw pitch feedback rod device for adjustable-pitch full-rotation propeller, this pitch feedback rod device comprises feedback rod device and lower feedback rod device, described upper feedback rod device is arranged at the inside of turning unit, lower feedback rod device is arranged at the inside of propulsion unit, and turning unit is connected by flange with propulsion unit;
Described upper feedback rod device comprises upper boom chamber, upper connecting rod, copper sheathing, ball seat, spring, baffle ring and steel ball, described copper sheathing is T-shaped structure, comprise interconnective perpendicular copper sheathing and horizontal copper sheathing, the upper end of perpendicular copper sheathing is connected with upper boom chamber, the middle part in upper boom chamber is run through and is provided with connecting rod, the lower end of horizontal copper sheathing is connected with the bottom surface of turning unit, the intracavity diameter of perpendicular copper sheathing is less than the intracavity diameter of horizontal copper sheathing, in the inner chamber of perpendicular copper sheathing, be provided with the ball seat with its bearing fit, on the sidewall of ball seat, offer through hole, in through hole, be provided with steel ball, the inside of ball seat is provided with upper ball base chamber and the lower ball base chamber communicating, ball seat is fixedly connected with the lower end of upper connecting rod by bolt, bolt comprises interconnective bolt column and bolt cap, bolt column is positioned at the inside of connecting rod lower end, the outside of upper connecting rod lower end is positioned at the inside in upper ball base chamber, bolt cap is positioned at the inside in lower ball base chamber, the outer cover of bolt cap has spring, the upper end of spring is connected with the top in lower ball base chamber, lower end is connected with baffle ring, the lower end of baffle ring contacts with the side of steel ball top, steel ball is by the inner chamber of horizontal copper sheathing, the lower end of baffle ring, through hole is jointly spacing,
Described lower feedback rod device comprises lower beam chamber, lower link and lower beam head, lower beam head comprises head portion and head portion, the diameter of head portion is greater than the diameter of head portion, agree with the lower end of baffle ring is corresponding on the top of head portion, the bottom of head portion is connected with lower link by head portion, the diameter of lower link at the perpendicular diameter of copper sheathing inner chamber, between the diameter in lower ball base chamber.
The inner chamber of described horizontal copper sheathing comprises horizontal copper sheathing epicoele and horizontal copper sheathing cavity of resorption, and the upper end of horizontal copper sheathing epicoele communicates with the inner chamber of perpendicular copper sheathing, and lower end communicates with horizontal copper sheathing cavity of resorption, and the area of horizontal copper sheathing epicoele upper end is less than the area of horizontal copper sheathing epicoele lower end; The vertical section of described horizontal copper sheathing epicoele is trapezoidal, and the vertical section of horizontal copper sheathing cavity of resorption is rectangle.
The lower end of described baffle ring is provided with the baffle ring groove of concave inward structure, and the top of described head portion is provided with the plush copper structure with chamfering, and plush copper structure is agreed with baffle ring groove is corresponding.
Compared with prior art, beneficial effect of the present invention is:
1, the upper feedback rod device in a kind of screw pitch feedback rod device for adjustable-pitch full-rotation propeller of the present invention comprises upper boom chamber, upper connecting rod, copper sheathing, ball seat, spring, baffle ring and steel ball, lower feedback rod device comprises lower beam chamber, lower link and lower beam head, during use, by lower beam head and ball seat, baffle ring, coordinating of steel ball realizing being certainly dynamically connected and throwing off of upper feedback rod device and lower feedback rod device, thereby whole pitch feedback rod device is had from being dynamically connected and the function of throwing off, reduced operation easier.Therefore the present invention not only possesses from being dynamically connected and the function of throwing off, and has reduced operation easier.
2, in a kind of screw pitch feedback rod device for adjustable-pitch full-rotation propeller of the present invention when upper feedback rod device and lower feedback rod device are after being dynamically connected, lower beam head and baffle ring closely agree with, what make that mechanical displacement signal that lower link will transmit in vertical direction can be complete passes through lower beam head, baffle ring, ball seat passes to connecting rod successively, guarantee that upper connecting rod obtains mechanical displacement signal accurately, in the process of transmitting, spring can dwindle the gap of vertical direction as far as possible, thereby again improve the accuracy of mechanical displacement signal, and then obtain pitch feedback signal the most accurately.Therefore the present invention can guarantee the precision of pitch feedback signal.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation before the present invention is docked.
Fig. 3 is the structural representation before the present invention removes.
In figure: turning unit A, propulsion unit B, upper feedback rod device C, lower feedback rod device D, upper connecting rod 1, copper sheathing 2, perpendicular copper sheathing 21, horizontal copper sheathing 22, horizontal copper sheathing epicoele 221, horizontal copper sheathing cavity of resorption 222, ball seat 3, upper ball base chamber 31, lower ball base chamber 32, spring 4, baffle ring 5, baffle ring groove 51, steel ball 6, lower beam head 7, head portion 71, plush copper structure 711, head portion 72, lower link 8, through hole 9, bolt 10, bolt column 101, bolt cap 102, upper boom chamber 11, lower beam chamber 12, flange face 13.
The specific embodiment
Below in conjunction with accompanying drawing explanation and the specific embodiment, the present invention is further detailed explanation.
Referring to figure 1 – Fig. 3, a kind of screw pitch feedback rod device for adjustable-pitch full-rotation propeller, this pitch feedback rod device comprises feedback rod device C and lower feedback rod device D, described upper feedback rod device C is arranged at the inside of turning unit A, lower feedback rod device D is arranged at the inside of propulsion unit B, and turning unit A is connected by flange with propulsion unit B;
Described upper feedback rod device C comprises upper boom chamber 11, upper connecting rod 1, copper sheathing 2, ball seat 3, spring 4, baffle ring 5 and steel ball 6, described copper sheathing 2 is T-shaped structure, comprise interconnective perpendicular copper sheathing 21 and horizontal copper sheathing 22, the upper end of perpendicular copper sheathing 21 is connected with upper boom chamber 11, the middle part in upper boom chamber 11 is run through and is provided with connecting rod 1, the lower end of horizontal copper sheathing 22 is connected with the bottom surface of turning unit A, the intracavity diameter of perpendicular copper sheathing 21 is less than the intracavity diameter of horizontal copper sheathing 22, in the inner chamber of perpendicular copper sheathing 21, be provided with the ball seat 3 with its bearing fit, on the sidewall of ball seat 3, offer through hole 9, in through hole 9, be provided with steel ball 6, the inside of ball seat 3 is provided with the upper ball base chamber 31 and lower ball base chamber 32 communicating, ball seat 3 is fixedly connected with the lower end of upper connecting rod 1 by bolt 10, bolt 10 comprises interconnective bolt column 101 and bolt cap 102, bolt column 101 is positioned at the inside of connecting rod 1 lower end, the outside of upper connecting rod 1 lower end is positioned at the inside in upper ball base chamber 31, bolt cap 102 is positioned at the inside in lower ball base chamber 32, the outer cover of bolt cap 102 has spring 4, the upper end of spring 4 is connected with the top in lower ball base chamber 32, lower end is connected with baffle ring 5, the lower end of baffle ring 5 contacts with the side top of steel ball 6, steel ball 6 is by the inner chamber of horizontal copper sheathing 22, the lower end of baffle ring 5, through hole 9 is jointly spacing,
Described lower feedback rod device D comprises lower beam chamber 12, lower link 8 and lower beam head 7, lower beam head 7 comprises head portion 71 and head portion 72, the diameter of head portion 71 is greater than the diameter of head portion 72, corresponding the agreeing with in lower end of the top of head portion 71 and baffle ring 5, the bottom of head portion 71 is connected with lower link 8 by head portion 72, the diameter of lower link 8 at the perpendicular diameter of copper sheathing 21 inner chambers, between the diameter in lower ball base chamber 32.
The inner chamber of described horizontal copper sheathing 22 comprises horizontal copper sheathing epicoele 221 and horizontal copper sheathing cavity of resorption 222, the upper end of horizontal copper sheathing epicoele 221 communicates with the inner chamber of perpendicular copper sheathing 21, lower end communicates with horizontal copper sheathing cavity of resorption 222, and the area of horizontal copper sheathing epicoele 221 upper ends is less than the area of horizontal copper sheathing epicoele 221 lower ends; The vertical section of described horizontal copper sheathing epicoele 221 is trapezoidal, and the vertical section of horizontal copper sheathing cavity of resorption 222 is rectangle.
The lower end of described baffle ring 5 is provided with the baffle ring groove 51 of concave inward structure, and the top of described head portion 71 is provided with the plush copper structure 711 with chamfering, and plush copper structure 711 is agreed with baffle ring groove 51 is corresponding.
Principle of the present invention is described as follows:
When turning unit A, propulsion unit B are during in separated position, in turning unit A the included ball seat 3 of upper feedback rod device C, baffle ring 5, steel ball 6 under the spring-force driven dual of spring 4 in lower end position, and the bottom of ball seat 3 slightly exceeds the bottom surface that flange face 13(is turning unit A, the end face of propulsion unit B) segment distance; When turning unit A, propulsion unit B are in docking operation, in propulsion unit B, the lower included lower beam head 7 of feedback rod device D stretches in the ball seat 3 in feedback rod device C, and agree with mutually with the lower end of baffle ring 5, then baffle ring 5 is upwards pushed up, now steel ball 6 snaps in through hole 9 completely, make connecting rod 1, lower link 8 location, realize the tight connection of feedback rod.Because actual feedback stroke is less than the stroke that steel ball 6 can be movable, thereby in actual feedback motion, steel ball 6 can not deviate from; When turning unit A, propulsion unit B throw off, lower beam head 7 is moved down into steel ball 6 throws off, and upper feedback rod device C, lower feedback rod device D have also just thrown off.The present invention is all without artificial participation when connecting and depart from, and Assembly &Disassembly all completes automatically, convenient and reliable.
Using method of the present invention comprises the following steps successively:
1, before docking: referring to Fig. 2, for convenience of docking, upper feedback rod device C, lower feedback rod device D will stretch out flange face 13 certain distances, go up lower link 8 in the bottom of ball seat 3 in feedback rod device C, lower feedback rod device D and all will stretch out flange face 13 certain distances with the top of lower beam head 7.Now, baffle ring 5 ejects steel ball 6 under spring 4 effects, and steel ball 6 is jointly spacing by the lower end of the inner chamber of horizontal copper sheathing 22, baffle ring 5, through hole 9.The extension elongation of noting ball seat 3 now can not surpass and requires specified value, otherwise steel ball 6 can be deviate from.
While 2, docking: lower beam head 7 stretches in the ball seat 3 in feedback rod device C, and agree with mutually with the lower end of baffle ring 5, then pass through upwards Compress Spring 4 of baffle ring 5, and ball seat 3 is upwards pushed up, ball seat 3 is by after jack-up, and steel ball 6 is with moving on ball seat 3, and sticked in the inner chamber of through hole 9 and perpendicular copper sheathing 21, lower beam head 7 compresses steel ball 6 under the effect of spring 4 simultaneously, and steel ball 6 is jointly spacing by through hole 9, lower beam head 7, now docks successfully.
3, after docking: referring to Fig. 1, now, the effect of spring 4 is axial motions of eliminating to greatest extent after docking, compress lower beam head 7 and steel ball 6, reduce the signal transmission error of joint.Simultaneously; can be according to the position of connecting rod 1, lower link 8 in pitch position adjustment; because design is upper, guarantee that the transmission scope of pitch mechanical signal is less than the height of horizontal copper sheathing 22 inner chambers; therefore steel ball 6 can not move to the lower end of horizontal copper sheathing 22 inner chambers in the course of the work, guarantee carrying out smoothly of mechanical signal transmission.
While 4, removing: referring to Fig. 3, lower beam head 7 and steel ball 6 drive ball seat 3 to move down into horizontal copper sheathing 22 inner chambers, and steel ball 6 slides into horizontal copper sheathing 22 inner chambers, lower beam head 7 is deviate from, upper feedback rod device C, lower feedback rod device D throw off, and want slowly, in order to avoid too soon steel ball 6 is taken out of to horizontal copper sheathing 22 inner chambers during disengagement.
Therefore the present invention not only possesses from being dynamically connected with the function of throwing off, having reduced operation easier, and can guarantee the precision of pitch feedback signal.
Claims (3)
1. a screw pitch feedback rod device for adjustable-pitch full-rotation propeller, this pitch feedback rod device comprises feedback rod device (C) and lower feedback rod device (D), described upper feedback rod device (C) is arranged at the inside of turning unit (A), lower feedback rod device (D) is arranged at the inside of propulsion unit (B), and turning unit (A) is connected by flange with propulsion unit (B), it is characterized in that:
Described upper feedback rod device (C) comprises upper boom chamber (11), upper connecting rod (1), copper sheathing (2), ball seat (3), spring (4), baffle ring (5) and steel ball (6), described copper sheathing (2) is T-shaped structure, comprise interconnective perpendicular copper sheathing (21) and horizontal copper sheathing (22), the upper end of perpendicular copper sheathing (21) is connected with upper boom chamber (11), the middle part in upper boom chamber (11) is run through and is provided with connecting rod (1), the lower end of horizontal copper sheathing (22) is connected with the bottom surface of turning unit (A), the intracavity diameter of perpendicular copper sheathing (21) is less than the intracavity diameter of horizontal copper sheathing (22), in the inner chamber of perpendicular copper sheathing (21), be provided with the ball seat (3) with its bearing fit, on the sidewall of ball seat (3), offer through hole (9), in through hole (9), be provided with steel ball (6), the inside of ball seat (3) is provided with the upper ball base chamber (31) and lower ball base chamber (32) communicating, ball seat (3) is fixedly connected with the lower end of upper connecting rod (1) by bolt (10), bolt (10) comprises interconnective bolt column (101) and bolt cap (102), bolt column (101) is positioned at the inside of connecting rod (1) lower end, the outside of upper connecting rod (1) lower end is positioned at the inside of upper ball base chamber (31), bolt cap (102) is positioned at the inside of lower ball base chamber (32), the outer cover of bolt cap (102) has spring (4), the upper end of spring (4) is connected with the top of lower ball base chamber (32), lower end is connected with baffle ring (5), the lower end of baffle ring (5) contacts with the side top of steel ball (6), steel ball (6) is by the inner chamber of horizontal copper sheathing (22), the lower end of baffle ring (5), through hole (9) is jointly spacing,
Described lower feedback rod device (D) comprises lower beam chamber (12), lower link (8) and lower beam head (7), lower beam head (7) comprises head portion (71) and head portion (72), the diameter of head portion (71) is greater than the diameter of head portion (72), corresponding the agreeing with in lower end of the top of head portion (71) and baffle ring (5), the bottom of head portion (71) is connected with lower link (8) by head portion (72), and the diameter of lower link (8) is positioned at the diameter of perpendicular copper sheathing (21) inner chamber, between the diameter of lower ball base chamber (32).
2. a kind of screw pitch feedback rod device for adjustable-pitch full-rotation propeller according to claim 1, it is characterized in that: the inner chamber of described horizontal copper sheathing (22) comprises horizontal copper sheathing epicoele (221) and horizontal copper sheathing cavity of resorption (222), the upper end of horizontal copper sheathing epicoele (221) communicates with the inner chamber of perpendicular copper sheathing (21), lower end communicates with horizontal copper sheathing cavity of resorption (222), and the area of horizontal copper sheathing epicoele (221) upper end is less than the area of horizontal copper sheathing epicoele (221) lower end; The vertical section of described horizontal copper sheathing epicoele (221) is trapezoidal, and the vertical section of horizontal copper sheathing cavity of resorption (222) is rectangle.
3. a kind of screw pitch feedback rod device for adjustable-pitch full-rotation propeller according to claim 1, it is characterized in that: the lower end of described baffle ring (5) is provided with the baffle ring groove (51) of concave inward structure, the top of described head portion (71) is provided with the plush copper structure (711) with chamfering, and plush copper structure (711) and corresponding the agreeing with of baffle ring groove (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210004521.5A CN102556312B (en) | 2012-01-09 | 2012-01-09 | Screw pitch feedback rod device for adjustable-pitch full-rotation propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210004521.5A CN102556312B (en) | 2012-01-09 | 2012-01-09 | Screw pitch feedback rod device for adjustable-pitch full-rotation propeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102556312A CN102556312A (en) | 2012-07-11 |
| CN102556312B true CN102556312B (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210004521.5A Expired - Fee Related CN102556312B (en) | 2012-01-09 | 2012-01-09 | Screw pitch feedback rod device for adjustable-pitch full-rotation propeller |
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| Country | Link |
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| CN (1) | CN102556312B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106112221B (en) * | 2016-08-24 | 2018-07-31 | 武汉船用机械有限责任公司 | The production method of turning unit in a kind of rudder paddle |
| CN108928452A (en) * | 2018-06-21 | 2018-12-04 | 苏州船用动力系统股份有限公司 | A kind of non-contact transmission indicating mechanism for ship pitch tuning for Controllable Pitch Propeller feedback |
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| US2927551A (en) * | 1957-11-07 | 1960-03-08 | Curtiss Wright Corp | Steering mechanisms and the like |
| US3778187A (en) * | 1971-04-13 | 1973-12-11 | Propulsion Systems Inc | Controllable pitch propellers for marine vessels |
| CN1033310A (en) * | 1987-10-20 | 1989-06-07 | 诺瓦工厂股份公司 | Linear actuator with hydaulic amplification |
| EP0480211A1 (en) * | 1990-10-09 | 1992-04-15 | Peter Müller | Controllable pitch propeller |
| EP0939027A2 (en) * | 1998-02-25 | 1999-09-01 | Sanshin Kougho K.K. | Tilting apparatus with a cylinder piston assembly |
| JP3913262B1 (en) * | 2005-11-22 | 2007-05-09 | 川崎重工業株式会社 | Oil supply device for rotating shaft |
| CN201842246U (en) * | 2010-08-25 | 2011-05-25 | 南京高精船用设备有限公司 | Novel lateral adjustable-pitch propeller for ship |
| CN201999189U (en) * | 2011-03-31 | 2011-10-05 | 浙江汉力士船用推进系统有限公司 | Thread pitch feedback device |
| CN102248996A (en) * | 2011-04-28 | 2011-11-23 | 杭州前进齿轮箱集团股份有限公司 | Adjustable pitch propeller oil distributor with linear feedbacks |
-
2012
- 2012-01-09 CN CN201210004521.5A patent/CN102556312B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2927551A (en) * | 1957-11-07 | 1960-03-08 | Curtiss Wright Corp | Steering mechanisms and the like |
| US3778187A (en) * | 1971-04-13 | 1973-12-11 | Propulsion Systems Inc | Controllable pitch propellers for marine vessels |
| CN1033310A (en) * | 1987-10-20 | 1989-06-07 | 诺瓦工厂股份公司 | Linear actuator with hydaulic amplification |
| EP0480211A1 (en) * | 1990-10-09 | 1992-04-15 | Peter Müller | Controllable pitch propeller |
| EP0939027A2 (en) * | 1998-02-25 | 1999-09-01 | Sanshin Kougho K.K. | Tilting apparatus with a cylinder piston assembly |
| JP3913262B1 (en) * | 2005-11-22 | 2007-05-09 | 川崎重工業株式会社 | Oil supply device for rotating shaft |
| CN201842246U (en) * | 2010-08-25 | 2011-05-25 | 南京高精船用设备有限公司 | Novel lateral adjustable-pitch propeller for ship |
| CN201999189U (en) * | 2011-03-31 | 2011-10-05 | 浙江汉力士船用推进系统有限公司 | Thread pitch feedback device |
| CN102248996A (en) * | 2011-04-28 | 2011-11-23 | 杭州前进齿轮箱集团股份有限公司 | Adjustable pitch propeller oil distributor with linear feedbacks |
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|---|---|
| CN102556312A (en) | 2012-07-11 |
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Granted publication date: 20140212 Termination date: 20200109 |