CN111731463A - Vortex-eliminating fin structure with detachable fin blades - Google Patents
Vortex-eliminating fin structure with detachable fin blades Download PDFInfo
- Publication number
- CN111731463A CN111731463A CN202010549221.XA CN202010549221A CN111731463A CN 111731463 A CN111731463 A CN 111731463A CN 202010549221 A CN202010549221 A CN 202010549221A CN 111731463 A CN111731463 A CN 111731463A
- Authority
- CN
- China
- Prior art keywords
- fin
- guide body
- flow guide
- propeller
- baffle
- Prior art date
- 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.)
- Pending
Links
- 239000013535 sea water Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000010935 stainless steel Substances 0.000 claims abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 6
- 239000004519 grease Substances 0.000 claims abstract 3
- 238000007789 sealing Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 3
- 229910052802 copper Inorganic materials 0.000 claims 3
- 239000010949 copper Substances 0.000 claims 3
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 239000000956 alloy Substances 0.000 claims 1
- 239000003653 coastal water Substances 0.000 claims 1
- 238000003754 machining Methods 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 230000001681 protective effect Effects 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/28—Other means for improving propeller efficiency
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a band is dismantled whirlpool fin structure that disappears of fin leaf, includes a baffle, and baffle inside is the cavity, and the baffle outside is 4 or 5 recesses of one end open-ended, installs the fin leaf in the recess, and the round hole is opened to the baffle rear side, and the baffle front side is the flange, has the seal groove on the flange terminal surface. When the propeller is installed on the propeller shaft and is tightly pressed through the fixing nut, the flow guide body is installed on the propeller hub through the bolt, grease is injected through the circular hole at the rear end of the flow guide body, and after the flow guide body is filled with the grease, the flow guide body is sealed by the rear end cover, so that the situation that the propeller is difficult to disassemble due to the fact that parts are corroded by seawater is prevented. And finally, mounting the fin blade into the groove of the flow guide body and fixing the fin blade by using a stainless steel screw. The device has the characteristics of simple structure, convenience in processing and manufacturing, low cost, easiness in maintenance, capability loss of the rotating water flow at the rear side of the propeller, reduction of exciting force and noise of the wake flow of the propeller, further reduction of oil consumption of a main engine, improvement of propelling performance of a ship and the like.
Description
Technical Field
The invention relates to a vortex-eliminating fin structure with detachable fin blades, and belongs to the technical field of ship propulsion.
Background
With the continuous development of ship propulsion technology, high-power and high-rotation-speed engines are widely applied to ships. Correspondingly, the rotating speed of the propeller is higher and higher, so that the problem of the loss of rotating energy in the wake flow of the propeller is more prominent. In addition, with the requirement for vibration reduction and noise reduction becoming higher and higher, the problem of vibration noise induced by the propeller wake is also urgently to be solved. In order to reduce the energy loss and the oil consumption of the engine, the ship is more environment-friendly, and therefore additional devices arranged in front of and behind the propeller are correspondingly used in various ships. At present, in the traditional additional device, a common diversion cap structure does not have fin blades and does not have an energy-saving effect; the novel vortex-eliminating fin with the fin blades has an integrated structure of the fin blades and the vortex-eliminating fin, is complex in structure and high in manufacturing cost, and is only applied to some large ships. When the fin blade is damaged, the vortex-eliminating fin with the integrated structure is maintained, the propeller shaft is protected from seawater corrosion, the propeller shaft needs to be replaced on the shore, and the maintenance cost is high.
Therefore, it is urgently needed to provide a structure which has a simple structure, is convenient to process and manufacture, has low cost and is easy to maintain, can reduce the loss of the rotation energy in the wake flow of the propeller, greatly reduces the exciting force and the noise of the propeller and improves the propelling performance of the ship.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the structure which is simple in structure, convenient to process and manufacture, low in cost, capable of reducing the loss of rotation energy in the wake flow of the propeller, reducing the exciting force and noise of the propeller, further reducing the oil consumption of the main engine, improving the propelling performance of the ship and widely applied to various ships.
The invention aims to solve the technical scheme that the vortex-eliminating fin structure with the detachable fin blades comprises a flow guide body, wherein a cavity is formed in the flow guide body, a groove with an opening at the rear end is formed in the outer part of the flow guide body, a round hole is formed in the rear side of the flow guide body, and a flange is formed in the front side of the flow guide body; the flange at the front end of the flow guide body is provided with a bolt hole for connecting the flow guide body and the propeller hub. And a rear cover plate is arranged on the circular hole at the rear end of the flow guide body. The inside cavity of baffle forms sealed space structure with back shroud and screw propeller hub to the inside fixation nut of protection and screw shaft tip screw thread prevent that the sea water from getting into, corrode the part, thereby lead to the screw to be difficult to dismantle. And fin blades are arranged in the grooves outside the flow guide body.
Preferably, the method comprises the following steps: the flange end face of the front part of the flow guide body is provided with a sealing groove, a sealing ring can be installed, and seawater is prevented from entering the inner cavity.
Preferably, the method comprises the following steps: the rear cover plate is provided with a sealing groove, and a sealing ring can be arranged to prevent seawater from entering the inner cavity of the flow guide body.
As further preferred: the fin blade comprises base and blade, and base and blade junction fillet are excessive, and the base is arc structure, slightly tapering, and the tapering direction is along the outer profile of screw propeller hub, forms the streamlined of wide and smooth. The blades with symmetrical blade shapes are uniformly distributed on the outer portion of the base along the circumferential direction, and the installation angle of each blade and the geometric pitch angle of the root portion of the propeller blade have a certain difference value which is generally-15 degrees, so that the blades and the rotating water flow form a certain attack angle and thrust is generated.
As further preferred: the number of the fins is consistent with the number of the propeller blades, and the number of the fins is generally 4 or 5.
The fin blade can be used as a spare part, when the blade fails due to structural damage and the like, the whole vortex-eliminating fin does not need to be disassembled on the shore of a ship, and the fin blade is isolated outside the sealed cavity of the flow guide body, so that the fin blade can be directly disassembled and replaced in seawater conveniently, the maintainability of equipment is greatly improved, and the maintenance cost is saved.
The invention has the characteristics of simple structure, convenient processing and manufacturing, low cost, capability of reducing the loss of rotation energy in the wake flow of the propeller, reducing the exciting force and noise of the propeller, further reducing the oil consumption of the main engine, improving the propelling performance of the ship and the like.
Drawings
FIG. 1 is a front view (semi-sectional view) of the structure of the present invention;
FIG. 2 is an enlarged view of a portion of the present invention;
FIG. 3 is a top view of the structure of the present invention;
fig. 4 is a perspective view of the structure of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. As shown in fig. 1-4, the vortex elimination fin structure with detachable fin blades of the present invention includes a flow guiding body 2, the flow guiding body has an inner cavity, an outer cavity having a rear end with a groove, a rear portion with a circular hole, and a front portion with a flange; the flange at the front end of the flow guide body is provided with a bolt hole for connecting the flow guide body and the propeller hub. And a rear cover plate 1 is arranged on the circular hole at the rear end of the flow guide body. The inner cavity of the flow guiding body, the rear cover plate and the propeller hub form a sealed space structure so as to protect the inner fixing nut 10 and the end threads of the propeller shaft 12 and prevent seawater from corroding parts and causing difficult disassembly. And fin blades 4 are arranged in the grooves outside the flow guide body.
As shown in fig. 2, a rear cover plate 1 is installed on the rear side of the flow conductor, and is fixed on the flow conductor through a cover plate screw 7; the rear cover plate is provided with a sealing groove for mounting a rear cover plate sealing ring 8 so as to prevent seawater from entering the inner cavity of the flow guide body.
As shown in fig. 1 and 4, the vortex elimination fin structure with the detachable fin blades integrally installs the vortex elimination fin on the rear side of the propeller 11 through the installation bolt and the gasket 5 on the front end flange. The front end flange of the flow guide body is provided with a sealing groove for mounting a static axial sealing ring 6 so as to prevent seawater from entering the inner cavity of the flow guide body.
Example (b): as shown in fig. 1 and 4, the deswirler fin structure with the detachable fin blades has a rear flush structure, which is different from a structure in which the radial dimension of the conventional deswirler fin is gradually reduced to zero. The implementation of the structure shortens the length of the vortex-eliminating fin and reduces the manufacturing cost. In addition, the water flow flows along the linear shape of the propeller hub and the vortex-eliminating fins, and the water flow automatically contracts after being separated from the vortex-eliminating fins, so that the virtual length of the vortex-eliminating fins is increased, and the frictional resistance between the water flow and the vortex-eliminating fins is reduced.
Example (b): FIG. 3 shows: the vortex-eliminating fin structure with the detachable fin blades is characterized in that the fin blades are arranged in an external groove of the flow guide body; the width of the groove is gradually reduced from the front side to the rear side of the guide body groove, and a tapered groove is formed. Since the water flows backward, it has a backward impact force on the fin. The arrangement of the conical groove can effectively resist the impact force of water flow. On the other hand, the bottom area of the groove is small, the top area of the groove is large, so that the two side surfaces of the groove form an inverted 'eight' shape, and the fin blades automatically slide downwards along the two side surfaces of the groove when being installed, so that the installation is very easy. The front side and the rear side of the fin blade are respectively provided with a high-strength stainless steel screw 3 for fixing the fin blade and bearing the action of centrifugal force during rotation.
The invention has the beneficial effects that:
according to the vortex-eliminating fin structure with the detachable fin blades, the fin blades are mounted on the flow guide body, the flow guide body and the fin blades are of a split structure, the processing technology of parts is simple, the manufacturing cost is low, and the maintenance is easy. The fin blade comprises base and blade, and base and blade junction fillet are excessive, have reduced stress concentration, and the base is convex structure, slightly has the tapering, and the tapering direction is along the outer profile of screw propeller hub, forms the streamlined of wide and smooth. The blades with symmetrical blade shapes are uniformly distributed on the outer portion of the base along the circumferential direction, the installation angle of each blade and the geometric pitch angle of the root of the propeller blade have a certain difference value which is-15 degrees generally, so that the blades and the rotating water flow form a certain attack angle, thrust is generated, exciting force and noise generated by propeller induction are reduced, engine oil consumption is reduced, and ship propulsion performance is improved.
The vortex-eliminating fin structure with the detachable fin blades can also be suitable for ships with light-load propellers. The eddy-eliminating fin structure is widely applied to various ships because the fin blades are detached and the groove of the flow guide body is filled with the epoxy resin, so that the streamline is smooth and can be used as a common flow guide cap.
Claims (4)
1. A vortex-eliminating fin structure with detachable fin blades comprises a flow guide body (2), wherein a cavity is formed inside the flow guide body, 4 or 5 grooves with openings at the rear end are formed outside the flow guide body, a circular hole is formed in the rear side of the flow guide body, and a flange is arranged on the front side of the flow guide body; the method is characterized in that: the anterior flange terminal surface of baffle on have the seal groove, mountable sealing washer (6), prevent that the sea water from getting into inside cavity, the bolt hole has on the flange, be used for connecting baffle and screw propeller hub, the round hole at baffle rear portion can be used to screw up the back and pour into the grease into, and observe the inside condition of cavity, the baffle outside recess is used for placing the base of fin leaf (4), and use high strength stainless steel screw (3), fix the fin leaf on the baffle, the baffle is inside to be the cavity, form the confined space structure with back shroud (1) and screw propeller hub, with inside fixation nut and the screw shaft end screw thread of protection, prevent that the sea water from corroding the part and lead to being difficult to dismantle.
2. The deswirler fin structure with removable fins of claim 1, wherein: the flow guide body and the fin blade (3) are of split structures, the flow guide body and the fin blade are simple in structure and easy to machine and manufacture, the flow guide body, the rear end plate and the fin blade are made of alloy copper or stainless steel materials capable of preventing seawater corrosion, the rear end plate is made of stainless steel plates or copper plates directly due to the fact that the structure is simple, the flow guide body is simple in structure and is made of stainless steel bars or copper bars, and the fin blade is formed by machining after being cast and formed by a die due to the fact that the blade is in a geometric distortion shape.
3. The deswirler fin structure with removable fins according to claim 1 or 2, wherein: the fin blade (4) is composed of a base and blades, the round angle at the joint of the base and the blades is excessive, the base is of an arc-shaped structure and has slight taper, the taper direction is along the outer contour of a propeller hub of the propeller to form a smooth streamline, the blades with symmetrical blade shapes are uniformly distributed on the outer portion of the base along the circumferential direction, the installation angle of the blades and the geometric pitch angle of the root portion of the propeller blade have a certain difference value which is generally-15 degrees, so that the blades and the rotating water flow form a certain attack angle, thrust is generated, the exciting force and noise of the propeller are reduced, the oil consumption of a main engine is further reduced, and the propelling performance of a ship is improved.
4. The deswirler fin structure with removable fins according to claims 1, 2, and 3, wherein: because the stern propeller area does not have protective structure, damage fin leaf (4) condition such as fishing net, steel wire winding takes place easily during the coastal waters operation, and at this moment, boats and ships need not to go to the bank and dismantle whole vortex-eliminating fin, and the fin leaf can be directly dismantled in the sea water as spare part and change, and is very convenient, has improved the maintainability of equipment widely, has practiced thrift the cost of maintaining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010549221.XA CN111731463A (en) | 2020-06-16 | 2020-06-16 | Vortex-eliminating fin structure with detachable fin blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010549221.XA CN111731463A (en) | 2020-06-16 | 2020-06-16 | Vortex-eliminating fin structure with detachable fin blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111731463A true CN111731463A (en) | 2020-10-02 |
Family
ID=72649413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010549221.XA Pending CN111731463A (en) | 2020-06-16 | 2020-06-16 | Vortex-eliminating fin structure with detachable fin blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111731463A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113716004A (en) * | 2021-09-10 | 2021-11-30 | 哈尔滨工程大学 | Novel bionic propeller |
| CN114834617A (en) * | 2022-03-10 | 2022-08-02 | 宜昌一凡船舶设计有限公司 | Welding type energy-saving vortex-eliminating fin and production process thereof |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB228343A (en) * | 1924-02-04 | 1925-02-05 | Nicholas Wladimir Akimoff | Improvements in or relating to hub appendages for marine and air propellers |
| CN102923285A (en) * | 2012-10-12 | 2013-02-13 | 中国船舶重工集团公司第七○二研究所 | Vortex removal fin of propeller hub |
| KR20140064223A (en) * | 2012-11-20 | 2014-05-28 | 대우조선해양 주식회사 | Propeller for vessel |
| KR101401498B1 (en) * | 2013-03-14 | 2014-06-03 | 한국해양과학기술원 | Dynamometer for measuring thrust and torque of propeller boss cap fin |
| KR20160004526A (en) * | 2014-07-03 | 2016-01-13 | 대우조선해양 주식회사 | Controllable pitch cap fin of Controllable pitch propeller |
| CN205311870U (en) * | 2016-01-23 | 2016-06-15 | 国营海东造船厂 | Whirlpool fin disappears |
| KR101834323B1 (en) * | 2016-08-26 | 2018-03-05 | 삼성중공업 주식회사 | Propeller boss cap |
| CN209321210U (en) * | 2018-11-08 | 2019-08-30 | 杭州前进齿轮箱集团股份有限公司 | A kind of whirlpool cylinder structure that disappears for controllable pitch propeller |
| CN110316344A (en) * | 2019-07-09 | 2019-10-11 | 南京高精船用设备有限公司 | A kind of adjustable propeller whirlpool fin that disappears |
| CN110937090A (en) * | 2019-11-29 | 2020-03-31 | 南京盛航海运股份有限公司 | Ship propelling mechanism |
| CN213862638U (en) * | 2020-06-16 | 2021-08-03 | 杭州前进齿轮箱集团股份有限公司 | Vortex-eliminating fin structure with detachable fin blades |
-
2020
- 2020-06-16 CN CN202010549221.XA patent/CN111731463A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB228343A (en) * | 1924-02-04 | 1925-02-05 | Nicholas Wladimir Akimoff | Improvements in or relating to hub appendages for marine and air propellers |
| CN102923285A (en) * | 2012-10-12 | 2013-02-13 | 中国船舶重工集团公司第七○二研究所 | Vortex removal fin of propeller hub |
| KR20140064223A (en) * | 2012-11-20 | 2014-05-28 | 대우조선해양 주식회사 | Propeller for vessel |
| KR101401498B1 (en) * | 2013-03-14 | 2014-06-03 | 한국해양과학기술원 | Dynamometer for measuring thrust and torque of propeller boss cap fin |
| KR20160004526A (en) * | 2014-07-03 | 2016-01-13 | 대우조선해양 주식회사 | Controllable pitch cap fin of Controllable pitch propeller |
| CN205311870U (en) * | 2016-01-23 | 2016-06-15 | 国营海东造船厂 | Whirlpool fin disappears |
| KR101834323B1 (en) * | 2016-08-26 | 2018-03-05 | 삼성중공업 주식회사 | Propeller boss cap |
| CN209321210U (en) * | 2018-11-08 | 2019-08-30 | 杭州前进齿轮箱集团股份有限公司 | A kind of whirlpool cylinder structure that disappears for controllable pitch propeller |
| CN110316344A (en) * | 2019-07-09 | 2019-10-11 | 南京高精船用设备有限公司 | A kind of adjustable propeller whirlpool fin that disappears |
| CN110937090A (en) * | 2019-11-29 | 2020-03-31 | 南京盛航海运股份有限公司 | Ship propelling mechanism |
| CN213862638U (en) * | 2020-06-16 | 2021-08-03 | 杭州前进齿轮箱集团股份有限公司 | Vortex-eliminating fin structure with detachable fin blades |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113716004A (en) * | 2021-09-10 | 2021-11-30 | 哈尔滨工程大学 | Novel bionic propeller |
| CN114834617A (en) * | 2022-03-10 | 2022-08-02 | 宜昌一凡船舶设计有限公司 | Welding type energy-saving vortex-eliminating fin and production process thereof |
| CN114834617B (en) * | 2022-03-10 | 2023-05-02 | 宜昌一凡船舶设计有限公司 | Welding type energy-saving vortex eliminating fin and production process thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111731463A (en) | Vortex-eliminating fin structure with detachable fin blades | |
| CN110316344A (en) | A kind of adjustable propeller whirlpool fin that disappears | |
| CN107676214A (en) | Rudder ball turbine generator after a kind of marine propeller | |
| CN213862638U (en) | Vortex-eliminating fin structure with detachable fin blades | |
| CN105377692B (en) | It is vortexed for reducing rotating flow and propeller hub and improves the composite propeller hub cap of propulsive efficiency | |
| CN105035295A (en) | Marine rudder paddle shaft installing all-in-one machine | |
| KR950003362B1 (en) | Marine propulsion apparatus | |
| CN112960093A (en) | Tail vortex recovery device behind marine propeller | |
| CN109969367B (en) | Spindle shaft vortex vane type vector propulsion device for ship | |
| KR20120121112A (en) | Pre-swirl Stator of Ship | |
| CN211032982U (en) | Vortex-eliminating fin for adjustable propeller | |
| CN213109746U (en) | Non-hub propeller | |
| CN210027854U (en) | Novel alloy oil nylon propeller for boats and ships | |
| CN212386670U (en) | Fishing net collector structure | |
| KR200441227Y1 (en) | Stator adapted to rudder horn | |
| KR101470896B1 (en) | Non-rotational propeller cap for minimizing hub vortex cavitation | |
| KR20180001134U (en) | Resonance avoidance type pre-swirl stator | |
| CN206914601U (en) | A kind of damping reaction fin peculiar to vessel | |
| CN219687599U (en) | Rudder blade of guide cover | |
| US20150132145A1 (en) | Boat propeller nut | |
| CN217396789U (en) | Novel energy-saving device for ship hub cap fin | |
| CN216102723U (en) | Novel high efficiency rim formula propeller | |
| JP2020175877A (en) | Propulsion device for vessel | |
| CN218751336U (en) | Low-resistance ship propeller | |
| GB1600994A (en) | Ship propellor ducts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |