CN204473116U - The unitized construction of a kind of little tail fin and shaft strut - Google Patents
The unitized construction of a kind of little tail fin and shaft strut Download PDFInfo
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- CN204473116U CN204473116U CN201520009249.9U CN201520009249U CN204473116U CN 204473116 U CN204473116 U CN 204473116U CN 201520009249 U CN201520009249 U CN 201520009249U CN 204473116 U CN204473116 U CN 204473116U
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- tail fin
- axle system
- little tail
- propeller
- strut
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Abstract
The utility model relates to a kind of fixed sturcture of propeller for vessels, particularly relates to a kind ofly effectively reduce ship resistance and reduce the little tail fin of ship vibration and the unitized construction of shaft strut, belongs to Ship Design Technology field.A unitized construction for little tail fin and shaft strut, is characterized in that: comprise screw propeller, propeller shafting, little tail fin (4), bracing strut (3); The axle system length protected by little tail fin (4) is positioned at the leading portion of axle system, and accounts for 2/3rds of axle system overall length; Described bracing strut (3) is arranged on axle system back segment, position close to screw propeller.The utility model reduces screw propeller and vibrates the ship vibration caused, and improves boats and ships traveling comfort; Shorten axle system length, effectively improve transmission efficiency of shafting; Rational little tail fin and beauty's frame array mode, effectively reduce ship resistance; Compare large tail fin line style, reduce Alignment Design and build process difficulty.
Description
Technical field
The utility model relates to a kind of fixed sturcture of propeller for vessels, particularly relates to a kind of little tail fin of effective reduction ship resistance and the unitized construction of shaft strut, belongs to Ship Design Technology field.
Background technology
The speed of a ship or plane of passenger boat is usually higher, and main engine power is comparatively large, and the load of corresponding screw propeller is also higher.For the consideration of absorbing water restriction and safety, general passenger boat is all adopt the two paddle type formula of two-shipper.The Alignment Design of ro-ro passenger ship, not only will fully take into account the impact of resistance, because the requirement of passenger boat to traveling comfort is higher, also will consider the impact of line type stern on ship vibration especially when designing line style.
Tradition ro-ro passenger ship stern lines design generally has large tail fin pattern and shaft strut (being commonly called as beauty's frame) pattern two kinds, and these two kinds of line type stern patterns respectively have merits and faults.
Fig. 3 is large tail fin pattern; prop shaft is completely wrapped; this version compares and is beneficial to engine room arrangement; form due to large tail fin provides more space; main frame can be arranged in and compare rearward position; and shorten the length of prop shaft, and prop shaft is enclosed in tail fin, can be protected preferably.But because tail fin is near screw propeller, cause stern wake to be affected, Propeller Rotating Noise and pulsating pressure increase, thus cause the vibration of main body.This vibration is very disadvantageous for the traveling comfort of passenger boat.
Fig. 1 is beauty's frame pattern arrangement plan, and prop shaft is fixed on hull bottom by a pair bracing strut, and bracing strut is very little along the area in passenger boat navigation direction, and this design type significantly can improve the ship vibration that propeller-excited vibration brings.But this version can bring difficulty to engine room arrangement, see Fig. 2, because line type stern is raised gradually, hull structural member is encountered for avoiding gear case, main frame will be arranged in earlier position, and the length of axle also can increase greatly, and the space leaving engine room arrangement for is very limited.
Utility model content
The utility model technical issues that need to address are: the fixed sturcture of existing propeller for vessels, or take the form of large tail fin, or take the form of beauty's frame, large tail fin form causes stern wake to be affected, and Propeller Rotating Noise and pulsating pressure increase, thus cause the vibration of main body, affect the traveling comfort of passenger boat, the form main frame of beauty's frame will be arranged in earlier position, and the length of axle also can increase greatly, causes the layout of main frame very difficult.
The utility model takes following technical scheme:
A unitized construction for little tail fin and shaft strut, comprises screw propeller, propeller shafting, little tail fin 4, bracing strut 3; Axle system length by little tail fin 4 protection is positioned at the leading portion of axle system, and accounts for 2/3rds of axle system overall length; Described bracing strut 3 is arranged on axle system back segment, position close to screw propeller.
The feature of the technical program is: have employed the mode combined with little tail fin by bracing strut, instead of the version of large tail fin of the prior art and beauty's frame, provide the fixed form of a kind of brand-new screw propeller and axle system thereof, the small volume of little tail fin self, and distance screw propeller is distant, the impact being subject to stern wake is very little, large tail fin compared to prior art, Propeller Rotating Noise and pulsating pressure reduce greatly, the vibration of main body also reduces greatly, improves the traveling comfort of passenger boat; In addition, due to the setting of little tail fin, bracing strut can be arranged on axle system rear end near the position of screw propeller, the structure of beauty's frame compared to prior art, and the length of axle system shortens to some extent, and the layout of main frame is relatively easily a lot.
Further, the quantity of described bracing strut 3 is 1, propeller shafting and hull bottom is connected and fixed.
Further, the front end of described propeller shafting is connected with main engine room.
The beneficial effects of the utility model are:
1) reduce screw propeller and vibrate the ship vibration caused, improve boats and ships traveling comfort.
2) shorten axle system length, effectively improve transmission efficiency of shafting.
3) rational little tail fin and beauty's frame array mode, effectively reduce ship resistance.
4) compare large tail fin line style, reduce Alignment Design and build process difficulty.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that prior art adopts the screw propeller of beauty's shelf structure form and the fixed form of axle system thereof.
Fig. 2 is the Line Chart of prior art beauty frame.
Fig. 3 is the schematic diagram that prior art adopts the screw propeller of large tail fin version and the fixed form of axle system thereof.
Fig. 4 is the Line Chart of the large tail fin of prior art.
Fig. 5 is the schematic diagram that the present invention adopts the screw propeller of the unitized construction of little tail fin and shaft strut and the fixed form of axle system thereof.
In figure, 1. twin shaft support, 2. large tail fin, 3. bracing strut, 4. little tail fin.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is further illustrated.
See Fig. 5, the unitized construction of a kind of little tail fin and shaft strut, comprises screw propeller, propeller shafting, little tail fin 4, bracing strut 3; Axle system length by little tail fin 4 protection is positioned at the leading portion of axle system, and accounts for 2/3rds of axle system overall length; Described bracing strut 3 is arranged on axle system back segment, position close to screw propeller.
For traditional two-shipper r Zweier, prior art or employing bracing strut, or double tail fins, in addition, also do not adopt the design of other pattern.Because these two kinds of design types respectively have merits and faults, and shortcoming is more outstanding, and therefore the utility model provides a kind of new pattern, learns from other's strong points to offset one's weaknesses, and can retain the advantage of double tail fins, solves Layout Problem, can not increase again the disturbance force of screw propeller, solves vibration problem.This idea initial by the expert in many industries is negated, and from the angle of experience, the general viewpoint that this area has thinks that the array configuration of little tail fin and beauty's frame not only can not solve vibration and Layout Problem, also can increase the resistance of boats and ships.Practice is the sole criterion for testing truth, and the utility model overcomes technology prejudice, and in initial heuristic process, we start with from the design of bracing strut pattern line style, solves the problem of main frame layout by line style afterbody being added fertilizer.But we find, this method significantly can change the normal position of centre of buoyancy, and very unfavorable to the floading condition under boats and ships normal load operating mode, floading condition cannot meet related specifications requirement even.Since the line type stern not by adding fertile bracing strut pattern solves Layout Problem, we consider to start with from the pattern of tail fin.The wake optimized around tail fin and the object reaching vibration damping is reached by the size and form optimizing tail fin.By being optimized the size of little tail fin and structure accounting, and the rack form of beauty's frame is optimized, finally have found the optimised form of a tail fin and beauty's frame layout, solve main frame gear case Layout Problem, this arrangement form, not only shortens the length of boss rod, also effectively improves the wake around tail fin, thus substantially reduce ship vibration, really accomplish " learning from other's strong points to offset one's weaknesses ".As shown in Figure 5, the axle system length by tail fin protection accounts for axle system overall length 2/3, and through testing and verification, this version has good result of use.
The utility model have employed the mode combined with little tail fin by bracing strut, instead of the version of large tail fin of the prior art and beauty's frame, provide the fixed form of a kind of brand-new screw propeller and axle system thereof, the small volume of little tail fin self, and distance screw propeller is distant, very little on the impact of stern wake, large tail fin compared to prior art, Propeller Rotating Noise and pulsating pressure reduce greatly, and the vibration of main body also reduces greatly, improve the traveling comfort of passenger boat; In addition, due to the setting of little tail fin, bracing strut can be arranged on axle system rear end near the position of screw propeller, the structure of beauty's frame compared to prior art, and the length of axle system shortens to some extent, and the layout of main frame is relatively easily a lot.
Claims (3)
1. a unitized construction for little tail fin and shaft strut, is characterized in that:
Comprise screw propeller, propeller shafting, little tail fin (4), bracing strut (3);
The axle system length protected by little tail fin (4) is positioned at the leading portion of axle system, and accounts for 2/3rds of axle system overall length;
Described bracing strut (3) is arranged on axle system back segment, position close to screw propeller.
2. the unitized construction of little tail fin as claimed in claim 1 and shaft strut, is characterized in that:
The quantity of described bracing strut (3) is 1, propeller shafting and hull bottom is connected and fixed.
3. the unitized construction of little tail fin as claimed in claim 1 and shaft strut, is characterized in that:
The front end of described propeller shafting is connected with main engine room.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520009249.9U CN204473116U (en) | 2015-01-07 | 2015-01-07 | The unitized construction of a kind of little tail fin and shaft strut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520009249.9U CN204473116U (en) | 2015-01-07 | 2015-01-07 | The unitized construction of a kind of little tail fin and shaft strut |
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| Publication Number | Publication Date |
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| CN204473116U true CN204473116U (en) | 2015-07-15 |
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| CN201520009249.9U Active CN204473116U (en) | 2015-01-07 | 2015-01-07 | The unitized construction of a kind of little tail fin and shaft strut |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105730603A (en) * | 2016-01-05 | 2016-07-06 | 上海船舶研究设计院 | Stern structure for internal rotation double-paddle ship |
| CN111392023A (en) * | 2020-03-25 | 2020-07-10 | 中国船舶工业集团公司第七0八研究所 | Tail shaft support of ship |
-
2015
- 2015-01-07 CN CN201520009249.9U patent/CN204473116U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105730603A (en) * | 2016-01-05 | 2016-07-06 | 上海船舶研究设计院 | Stern structure for internal rotation double-paddle ship |
| CN111392023A (en) * | 2020-03-25 | 2020-07-10 | 中国船舶工业集团公司第七0八研究所 | Tail shaft support of ship |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |