CN111532407A - Offset type front-mounted pre-rotation guide wheel and ship - Google Patents
Offset type front-mounted pre-rotation guide wheel and ship Download PDFInfo
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- CN111532407A CN111532407A CN202010151909.2A CN202010151909A CN111532407A CN 111532407 A CN111532407 A CN 111532407A CN 202010151909 A CN202010151909 A CN 202010151909A CN 111532407 A CN111532407 A CN 111532407A
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- guide vane
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- vane
- pipe
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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
- B63H1/12—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
- B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
- B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
- B63H5/15—Nozzles, e.g. Kort-type
Abstract
The invention provides an offset type prepositioned pre-rotation guide wheel and a ship. The connecting piece is used for connecting the arc-shaped guide pipe with the tail part of the ship body, and the guide vane part is connected with the arc-shaped guide pipe and the tail part of the ship body. The side of the ship body corresponding to the rotation direction of the propeller is defined as a first side, and the other side of the ship body is defined as a second side. An end surface of the arc duct corresponding to the first side portion is set higher than an end surface of the arc duct corresponding to the second side portion. The guide vane part of the second side is the inner side and the outer side of the arc-shaped guide pipe distributed in a radial shape, so that the prerotation effect of water flow can be effectively enhanced, and the propelling efficiency of the ship is improved. Through getting rid of the asymmetric design mode of first topside part arc pipe to set up arc pipe trim and roll angle degree, effectively reduce the resistance that first topside department arc pipe arouses, solved the hull and lead to the problem of propulsion inefficiency owing to the pipe resistance. Meanwhile, the working load of the paddle at the position is reduced, and the pulsation energy level is reduced.
Description
Technical Field
The invention relates to the field of ship power energy conservation, in particular to an offset type preposed pre-rotation guide wheel and a ship.
Background
At present, energy conservation and emission reduction of ships become urgent requirements of ship scientific research institutes, design institutes, shipyards and shipowners, and ship hydrodynamic energy-saving attached devices in the ship industry have a huge market. The prior paddle front water power energy-saving device comprises a front pre-rotation half/full guide wheel, a wake flow compensation conduit, a rectifying fin, a front pre-rotation stator and the like. The energy-saving device adopting the guide wheel form is generally provided with a full guide pipe or a half guide pipe, a plurality of guide vanes are arranged in the energy-saving device, part of the guide vanes extend outwards to the outer side of the guide pipe, the guide pipe can play a role in rectifying incoming flow in front of the stern propeller, and the guide vanes play a role in pre-swirling flow. However, with the development of the ship-shaped technology, the stern line of the ship is increasingly thin and thin, the flow of the stern part of the ship is more and more uniform, the resistance of the pre-rotation guide wheel in the common form is overlarge, the function of the pre-rotation water flow is not strong, and the propelling efficiency of the ship is difficult to improve.
The leading type triangle-shaped pipe (wheel) that application number 201310704256.6 disclosed, the pipe that adopts is fan-shaped, installs three stator, can reduce the energy that the screw propeller wake field loses because of the rotation to the moderate degree reduces because of afterbody flows additional shape resistance that separates, but this type pipe's stator is shorter, and the prewhirl effect that produces is not strong, and energy-conserving effect is limited.
Application number 201310271844.5 provides a leading half guide wheel, which comprises a leading half guide pipe and a plurality of leading guide vanes, compared with the invention, the guide pipe of the leading half guide wheel has a downward opening, the guide vanes are only distributed on the inner side of the guide pipe, the appearance has obvious difference, and meanwhile, the leading half guide wheel has poor energy-saving effect on a thin stern-line type ship.
Application No. 201410032595.9 provides a pre-swirl fan duct, which consists of an arc-shaped guide plate and four guide vanes, two of which are arranged on the left and right. Compared with the invention, the guide pipe of the guide wheel is opened downwards, the guide vanes are only distributed on the inner side of the guide pipe, and the appearance is obviously different.
Application No. 201310271762.0 provides a light ray type front guide wheel, which comprises a front guide tube and a plurality of guide vanes, wherein the guide vanes are dispersedly arranged on the inner wall of the front guide tube, and the part of the front guide vanes, which is connected with the inner wall, extends to the outside of the front guide tube. Compared with the invention, the guide pipe of the guide wheel has no opening or is downward, the guide pipe generates larger resistance, and the arrangement position and the form of the guide vane are also greatly different.
Application number 201120513727.1 provides an energy-saving guide vane with a built-in guide vane, which is composed of a circular C-shaped guide vane body and three guide vanes arranged radially, and the structure of the energy-saving guide vane is similar to that of a front pre-swirl guide vane, but the guide vane body is complete and has no opening, and the guide vanes do not extend out of the guide vane.
Disclosure of Invention
The invention aims to provide an offset type prepositioned pre-rotation guide wheel and a ship, and aims to solve the problem that the existing pre-rotation guide wheel has overlarge resistance and is difficult to improve the propelling efficiency of the ship.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to an offset type prepositioned pre-rotating guide wheel, which comprises: the guide vane comprises an arc-shaped guide pipe, a connecting piece and a guide vane part;
the first end of the connecting piece is connected with the arc-shaped guide pipe, and the second end of the connecting piece is used for being connected with the tail part of the ship body;
the guide vane part is connected to the arc-shaped guide pipe, and the tail end of the guide vane part is connected to the tail part of the ship body;
the ship body is a first side on the side corresponding to the rotation direction of the propeller, and the other side of the ship body is a second side;
the horizontal height of the end surface of the arc-shaped guide pipe corresponding to the first side is higher than that of the end surface of the arc-shaped guide pipe corresponding to the second side.
According to the offset type prepositioned pre-rotating guide wheel, the part of the arc-shaped guide pipe corresponding to the first side is a first guide pipe section, and the part of the arc-shaped guide pipe corresponding to the second side is a second guide pipe section;
the guide vane portion comprises a first guide vane unit and a second guide vane unit; the head end of the first guide vane unit is connected to the inner wall surface of the first conduit section, and the tail end of the first guide vane unit is connected to the tail of the ship body; the head end of the second guide vane unit penetrates through and extends out of the second conduit section, and the tail end of the second guide vane unit is connected to the tail of the ship body.
According to the offset type prepositioned pre-rotation guide wheel, the first guide vane unit is a first guide vane; the second guide vane unit comprises a second guide vane, a third guide vane and a fourth guide vane;
the head end of the first guide vane is connected to the inner wall surface of the first conduit section, and the tail end of the first guide vane is connected to the tail of the ship body;
second stator, third stator and fourth stator are circumferential connection in proper order and wear to locate the second pipe section, just the tail end of second stator, third stator and fourth stator all connect in the afterbody of hull.
According to the offset type prepositioned pre-rotation guide wheel, the longitudinal inclination angle of the arc-shaped guide pipe is-5-10 degrees, and the transverse inclination angle of the arc-shaped guide pipe is-10 degrees.
According to the offset type preposed pre-rotation guide wheel, the circumferential angle range of the first guide blade and the centerline plane of the ship body is-80 degrees to-10 degrees.
According to the offset type preposed pre-rotation guide wheel, the circumferential angle range of the second guide blade and the centerline plane of the ship body is 10-70 degrees.
According to the offset type preposed pre-rotation guide wheel, the circumferential angle range of the third guide vane and the centerline plane of the ship body is 40-100 degrees.
According to the offset type preposed pre-rotation guide wheel, the circumferential angle range of the fourth guide vane and the centerline plane of the ship body is 70-130 degrees.
According to the offset type prepositioned pre-rotation guide wheel, the absolute value of the circumferential angle range of the first guide vane and the middle line surface of the ship body is smaller than that of the circumferential angle range of the middle line surface of the ship body of the fourth guide vane.
According to the offset type front pre-rotation guide wheel, the chord length of the arc-shaped guide pipe is 0.15-0.30 times of the diameter of the propeller.
According to the offset type front pre-rotation guide wheel, the diameter of an outlet of the arc-shaped guide pipe is 0.40-0.70 times of the diameter of a propeller, the diameter of an inlet of the arc-shaped guide pipe is 0.45-0.80 times of the diameter of the propeller, and the diameter of the outlet is smaller than the diameter of the inlet.
According to the offset type prepositioned pre-rotation guide wheel, the chord length of the first guide vane at the joint of the first guide vane and the arc-shaped guide pipe is smaller than or equal to the chord length of the arc-shaped guide pipe at the joint of the first guide vane and the arc-shaped guide pipe.
The ship is provided with the offset type preposed pre-rotation guide wheel.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
1. according to the embodiment of the invention, the arc-shaped guide pipe is connected to the stern through the connecting piece, and the guide vane part is connected between the arc-shaped guide pipe and the stern, so that the arc-shaped guide pipe can prerotate the water flow entering the propeller. Simultaneously, the end face of the arc-shaped guide pipe corresponding to the first side is set to be higher than the end face of the arc-shaped guide pipe of the second side, the resistance caused by the arc-shaped guide pipe at the position is effectively reduced through an asymmetric design mode of removing part of the arc-shaped guide pipe at the first side and setting the pitching angle and the transverse inclination angle of the arc-shaped guide pipe, and the problem that the ship body is low in propulsion efficiency due to the resistance of the guide pipe is solved. Meanwhile, the working load of the paddle at the position is reduced, and the pulsation energy level is reduced.
2. According to the embodiment of the invention, the first guide vane unit and the second guide vane unit are arranged and are respectively connected with the first conduit section and the second conduit section, so that rotating water flow (particularly the second guide vane unit) opposite to the rotating direction of the propeller is generated, the propelling efficiency is improved, and meanwhile, the connecting strength of the guide wheel and the ship body is enhanced.
Drawings
FIG. 1 is a front view of a marine offset pre-rotation guide wheel according to the present invention;
FIG. 2 is a left side view of a marine offset type pre-rotation guide wheel according to the present invention;
FIG. 3 is a schematic right-view diagram of a marine offset type pre-rotation guide wheel according to the present invention;
FIG. 4 is a three-dimensional schematic view of a marine offset type pre-rotation guide wheel according to the present invention;
FIG. 5 is a three-dimensional schematic view of a biased pre-rotation guide wheel with a pitch angle of 0 ° and a lateral angle of-5 ° for a catheter according to the present invention;
FIG. 6 is a three-dimensional schematic view of a biased pre-rotation guide wheel with a pitch angle of 6 ° and a lateral angle of-5 ° for a catheter according to the present invention;
FIG. 7 is a three-dimensional schematic view of an offset pre-swirl guide wheel of the present invention with a second vane unit inserted through and connected to a second duct section;
FIG. 8 is a three-dimensional schematic view of the offset pre-swirl guide wheel with the chord length of the second guide vane, the third guide vane and the fourth guide vane being greater than that of the arc-shaped guide duct according to the present invention.
Description of reference numerals: 01: an arcuate conduit; 02: a fourth guide vane; 03: a third guide vane; 04: a second guide vane; 05: a first guide vane; 06: a connecting member; 07: a hull; 08: a tail shaft outlet; 09: a propeller.
Detailed Description
The following detailed description of an embodiment of the offset pre-swirl guide wheel and vessel of the present invention will be described with reference to the accompanying drawings, which are provided for illustration only and are not intended to limit the scope of the invention, and various modifications of equivalent forms of the invention will be apparent to those skilled in the art and fall within the scope of the invention as defined in the appended claims.
Example one
When the ship sails in water, the resistance and the propulsion efficiency of the ship are the energy consumption levels of the ship, and the hydrodynamic force energy-saving device mainly plays a role in improving the propulsion efficiency of the ship. CFD calculation and experiments show that the rotating water flow opposite to the rotating direction of the propeller 09 is generated in front of the propeller 09, so that the propelling efficiency of the ship can be improved, and the energy consumption of the ship can be reduced. Based on the principle, the offset type preposed pre-rotation guide wheel is designed by combining the characteristics of the ship-shaped tail.
The present embodiment is illustrated and described with the rotation direction of the propeller 09 being right-handed.
Referring to fig. 1 to 4, in the present embodiment, the offset type front pre-swirl guide wheel includes an arc guide tube 01, a connecting member 06, and a guide vane portion. The connecting piece 06 is used for connecting the arc-shaped guide pipe 01 with the tail part of the ship body 07, and the guide vane part is connected with the arc-shaped guide pipe 01 and the tail part of the ship body 07. The ship body 07 is defined as a first side and a second side (i.e., the first side is a starboard side and the second side is a port side) corresponding to the rotation direction of the propeller 09. The end surface of the arc guide duct 01 corresponding to the starboard side portion is disposed higher than the end surface of the arc guide duct 01 corresponding to the port side portion, that is, the right end of the arc guide duct 01 has a higher level than the left end of the arc guide duct 01.
By removing the asymmetric design mode of the arc-shaped guide pipe 01 at the starboard part, the resistance caused by the arc-shaped guide pipe 01 at the starboard part is effectively reduced, the inflow at the upper part of the propeller 09 is accelerated, and the problem that the propulsion efficiency of the ship body 07 is low due to the guide pipe resistance is solved. Meanwhile, the working load of the paddle at the position is reduced, and the pulsation energy level is reduced.
The following describes a specific structure of the arc duct 01:
referring to fig. 5 and 6, the curved duct 01 is shaped like a C, and is disposed forward and upward of the tail shaft outlet 08 with the cut-out opening of the curved duct 01 facing downward and to the right. The curved duct 01 may be angled forward or backward (i.e. pitch angle) but at a distance from the propeller 09. The inclination angle of the arc-shaped conduit 01 is-5 degrees to 10 degrees (the front inclination is negative and can reduce the resistance on the arc-shaped conduit 01, the rear inclination is positive and can reduce the resistance caused by the arc-shaped conduit 01 on the ship body), and the inclination angle (namely the transverse inclination angle) of the arc-shaped conduit 01 towards the ship port or starboard is-10 degrees to 10 degrees (the left transverse inclination is negative and can increase the flow of the port and reduce the resistance on the right half side of the arc-shaped conduit 01, and the right transverse inclination is positive and can increase the flow of the starboard and reduce the resistance on the left half side of the arc-shaped conduit 01).
The chord length of the arc-shaped guide pipe 01 can be designed to be 0.15-0.30 times of the diameter of the propeller 09 (at the moment, the guide pipe structure meets the requirement, and the resistance performance is good). The diameter of the outlet of the arc-shaped guide pipe 01 is smaller than that of the inlet of the arc-shaped guide pipe (increasing the inflow of the propeller), the diameter of the outlet is 0.40-0.70 times of that of the propeller 09, and the diameter of the inlet is 0.45-0.80 times of that of the propeller 09. The height of the center of the arc-shaped conduit 01 can be designed to be more than or equal to that of the center line of the tail shaft outlet 08, and the cross section of the arc-shaped conduit 01 is in a wing type or flat type (good in resistance performance and suitable for processing). Of course, in other embodiments, the cross-sectional form of the arc-shaped duct 01 may be various, and is not limited herein. The effect of the arc is: (1) the height position of the gap section of the right conduit is higher, so that the resistance of the conduit is reduced, the working load of the paddle at the position is reduced, and the pulsating force energy level is reduced; (2) the inflow at the upper part of the propeller 09 is accelerated, so that the inflow of the propeller disc surface is more uniform; (3) the guide vane part is connected with the ship body 07, and the overall structural strength of the guide wheel is enhanced.
The following explains a specific structure of the guide vane part:
referring to fig. 1, 7 and 8, the guide vane portion includes a first guide vane 05 unit and a second guide vane 04 unit. Taking the right-handed rotation as an example, the portion of the arc-shaped guide pipe 01 corresponding to the starboard is the first guide pipe section, and the portion of the arc-shaped guide pipe 01 corresponding to the port is the second guide pipe section. The head end of the first guide vane 05 unit is connected to the inner wall surface of the first conduit section, and the tail end is connected to the tail part of the ship body 07; the second guide vane 04 unit penetrates through and is connected to the second conduit section, the tail end of the second guide vane 04 unit is connected to the tail of the ship body 07, and rotating water flow opposite to the rotating direction of the propeller 09 is generated, so that the propelling efficiency is improved, and meanwhile, the connecting strength of the guide wheel and the ship body 07 is enhanced.
Specifically, the first guide vane 05 unit can be a first guide vane 05, one end of the first guide vane 05 is connected to the first conduit section, and the other end of the first guide vane 05 is welded and fixed at the tail part of the ship body 07, and the circumferential angle α between the first guide vane 05 and the midline surface of the ship body 074The range can be-80 to-10 (the first guide vane 05 and duct 01 structure in this angle range meets the requirements, the duct 01 has small resistance and does not have negative influence on the cavitation performance of the propeller, the central line of the shaft of the propeller 09 is taken as a rotating shaft, and the anticlockwise direction is positive and the same below when the stern looks towards the bow).
The chord length of the first guide vane 05 at the joint of the first guide vane 05 and the arc-shaped guide duct 01 is smaller than or equal to the chord length of the arc-shaped guide duct 01 at the joint of the first guide vane 05 and the arc-shaped guide duct 01. The first guide vane 05 requires less pre-swirl and is therefore designed to be connected between the curved duct 01 and the tail of the hull 07; the chord length of the part is smaller than that of the guide pipe, so that the structural strength is ensured, and the processing difficulty is reduced.
The second guide vane 04 unit can be a second guide vane 04, a third guide vane 03 and a fourth guide vane 02, the three guide vanes are radially connected to the second conduit section and the tail of the ship body 07, and the three guide vanes are all arranged on the second conduit section in a penetrating mode. That is, the head ends of the three guide vanes all extend out of the second conduit section, and the tail ends are all connected to the tail part of the ship body 07. The three guide vanes are designed to be large in length, so that the guide vanes pre-rotate the water flow entering the propeller 09 to act on the cavity, and the propulsion efficiency is further improved.
Circumferential angle α of second guide vane 04 to the centreline plane of the hull 073Can range from 10 to 70 ° (arrangement)Required to maintain vane spacing, unobstructed flow field, counter-clockwise) third vane 03 has a circumferential angle α with the mean line plane of hull 072In the range of 40-100 ° (required to maintain vane spacing, unobstructed flow field for placement), the circumferential angle α of the fourth vane 02 to the mid-line plane of the hull 071The range is 70 degrees to 130 degrees (the guide vane is arranged to keep the interval requirement, the flow field is not blocked, and the guide vane pre-swirling flow has better effect).
At the same time, the circumferential angle α of the first guide vane 05 to the centreline plane of the hull 074The absolute value of the range is less than the circumferential angle α of the median plane of the fourth vane 02 hull 071The absolute value of the range (the fourth guide vane 02 pre-swirl water flow has better effect and simultaneously meets the requirement of keeping the guide vane interval; and the first guide vane 05 structure meets the requirement and simultaneously does not cause negative influence on the cavitation performance of the paddle).
Referring to fig. 8, preferably, the chord length of the three guide vanes of the second guide vane 04 unit at the connection with the second duct section may be designed to be larger than that of the second duct section. After the chord length of the guide vane is increased, the prerotation effect of the guide vane on the water flow is increased; meanwhile, because the chord length of the guide pipe is smaller than that of the guide vane, the resistance caused by the guide pipe is reduced, and the purpose of further improving the propelling efficiency is achieved.
The first guide vane 05, the second guide vane 04, the third guide vane 03 and the fourth guide vane 02 can be designed as wing profiles (large lift drag). Of course, in other embodiments, the design of the guide vane may be various, and is not limited herein.
The four guide vanes form different installation angles with each other, and the specific angle is determined according to the wake flow calculated by the CFD.
The effect of four vanes is: (1) the incoming flow direction in front of the propeller 09 is adjusted to generate rotating water flow opposite to the rotating direction of the propeller 09, so that the propelling efficiency is improved; (2) the wake flow peak of the hull 07 on the disc surface of the paddle is alleviated, the working load of the paddle is reduced, and the cavitation degree is reduced; (3) the ship body 07 is connected, and the structural strength of the guide wheel is enhanced.
The working principle of the offset type prepositioned pre-rotation guide wheel of the embodiment is as follows: the height position of the section of the guide pipe notch on the right side of the arc-shaped guide pipe 01 is higher, so that the resistance caused by the guide pipe can be effectively reduced, the inflow of the upper part of the propeller 09 is accelerated, the working load of the blades at the position is reduced, and meanwhile, four guide vanes and the ship body 07 are connected to enhance the structural strength. The four guide vanes are used for adjusting the incoming flow direction in front of the propeller 09 and generating rotating water flow opposite to the rotating direction of the propeller 09 so as to improve the propelling efficiency. The arc-shaped guide pipe 01 can be longitudinally and transversely inclined, and is connected with a plurality of guide vanes in various forms, and the guide wheel with small resistance, obvious prerotation, good cavitation performance, good energy-saving effect and good structural strength can be obtained through the combination of the arc-shaped guide pipe 01 and the guide vanes.
Example two
Referring to fig. 1 to 4, a ship is provided with the offset type front pre-rotation guide wheel in the first embodiment.
The offset pre-swirl guide wheel is arranged in front of and above the tail shaft outlet 08, but at a certain distance from the propeller 09. By arranging the pre-rotation guide wheel without the arc-shaped guide pipe 01 on the starboard, the resistance caused by the arc-shaped guide pipe 01 on the starboard of the pre-selection guide wheel is effectively reduced, the inflow at the upper part of the propeller 09 is accelerated, and the problem of low propelling efficiency of the ship body 07 due to the guide pipe resistance is solved. Meanwhile, the working load of the paddle at the position is reduced, the pulsating force level is reduced, and the propelling efficiency of the ship is improved.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
Claims (14)
1. An offset leading pre-swirl roller, comprising: the guide vane comprises an arc-shaped guide pipe, a connecting piece and a guide vane part;
the first end of the connecting piece is connected with the arc-shaped guide pipe, and the second end of the connecting piece is used for being connected with the tail part of the ship body;
the guide vane part is connected to the arc-shaped guide pipe, and the tail end of the guide vane part is connected to the tail part of the ship body;
the ship body is a first side on the side corresponding to the rotation direction of the propeller, and the other side of the ship body is a second side;
the horizontal height of the end surface of the arc-shaped guide pipe corresponding to the first side is higher than that of the end surface of the arc-shaped guide pipe corresponding to the second side.
2. The offset leading pre-swirl wheel of claim 1, wherein the portion of the arcuate duct corresponding to the first side is a first duct section and the portion of the arcuate duct corresponding to the second side is a second duct section;
the guide vane portion comprises a first guide vane unit and a second guide vane unit; the head end of the first guide vane unit is connected to the inner wall surface of the first conduit section, and the tail end of the first guide vane unit is connected to the tail of the ship body; the head end of the second guide vane unit penetrates through and extends out of the second conduit section, and the tail end of the second guide vane unit is connected to the tail of the ship body.
3. The offset pre-swirl wheel of claim 2, wherein the first vane unit is a first vane; the second guide vane unit comprises a second guide vane, a third guide vane and a fourth guide vane;
the head end of the first guide vane is connected to the inner wall surface of the first conduit section, and the tail end of the first guide vane is connected to the tail of the ship body;
second stator, third stator and fourth stator are circumferential connection in proper order and wear to locate the second pipe section, just the tail end of second stator, third stator and fourth stator all connect in the afterbody of hull.
4. The offset forward pre-swirl guide wheel according to claim 1, wherein the longitudinal inclination angle of the arc-shaped guide pipe is-5 ° to 10 °, and the transverse inclination angle of the arc-shaped guide pipe is-10 ° to 10 °.
5. The offset leading pre-swirl wheel of claim 3, wherein the circumferential angle of the first guide vane to the mid-line plane of the hull is in the range of-80 ° to-10 °.
6. The offset leading pre-swirl wheel of claim 3, wherein the circumferential angle of the second guide vane to the mid-line plane of the hull is in the range of 10 ° to 70 °.
7. The offset leading pre-swirl wheel of claim 3, wherein the third guide vane has a circumferential angle with the median plane of the hull in the range of 40 ° to 100 °.
8. The offset leading pre-swirl wheel of claim 3, wherein the fourth guide vane has a circumferential angle with the median plane of the hull in the range of 70 ° to 130 °.
9. The offset leading pre-swirl vane of claim 3, wherein the absolute value of the circumferential angular extent of the first vane from the median plane of the hull is less than the absolute value of the circumferential angular extent of the median plane of the hull of the fourth vane.
10. The offset leading pre-swirl guide wheel of claim 1, wherein the arc duct has a chord length of 0.15 to 0.30 times the diameter of the propeller.
11. The offset leading pre-swirl wheel of claim 1, wherein the arc duct has an outlet diameter of 0.40 to 0.70 times the propeller diameter, an inlet diameter of 0.45 to 0.80 times the propeller diameter, and the outlet diameter is less than the inlet diameter.
12. The offset pre-swirl guide wheel of claim 3, wherein a chord length of the first guide vane at the first guide vane to arc duct junction is less than or equal to a chord length of the arc duct at the first guide vane to arc duct junction.
13. The offset leading pre-swirl guide wheel of claim 3, wherein the length of the blade tips of the second, third and fourth guide vanes to the propeller shaft center of the propeller is 0.7-1.2 times the propeller radius.
14. A vessel provided with an offset leading pre-swirl wheel as claimed in any one of claims 1 to 13.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010151909.2A CN111532407A (en) | 2020-03-06 | 2020-03-06 | Offset type front-mounted pre-rotation guide wheel and ship |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010151909.2A CN111532407A (en) | 2020-03-06 | 2020-03-06 | Offset type front-mounted pre-rotation guide wheel and ship |
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| CN202010151909.2A Pending CN111532407A (en) | 2020-03-06 | 2020-03-06 | Offset type front-mounted pre-rotation guide wheel and ship |
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| CN112173038A (en) * | 2020-09-27 | 2021-01-05 | 江苏新扬子造船有限公司 | Method for mounting preposed pre-rotation guide wheel |
| CN113879498A (en) * | 2021-11-10 | 2022-01-04 | 中国船舶工业集团公司第七0八研究所 | Marine spiral line type guide pipe fin |
| CN114379752A (en) * | 2021-12-09 | 2022-04-22 | 南通海国机械有限公司 | Leading guide pulley of prewhirling for boats and ships |
| CN115056950A (en) * | 2022-07-15 | 2022-09-16 | 上海外高桥造船有限公司 | Paddle adjusting component and ship |
| CN115071938A (en) * | 2022-06-29 | 2022-09-20 | 广船国际有限公司 | Front-mounted energy-saving device |
| CN117622442A (en) * | 2024-01-26 | 2024-03-01 | 江苏扬子鑫福造船有限公司 | Hydrodynamic energy-saving twisted fin structure in front of propeller |
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2020
- 2020-03-06 CN CN202010151909.2A patent/CN111532407A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112173038A (en) * | 2020-09-27 | 2021-01-05 | 江苏新扬子造船有限公司 | Method for mounting preposed pre-rotation guide wheel |
| CN112173038B (en) * | 2020-09-27 | 2022-05-17 | 江苏新扬子造船有限公司 | Method for mounting preposed pre-rotation guide wheel |
| CN113879498A (en) * | 2021-11-10 | 2022-01-04 | 中国船舶工业集团公司第七0八研究所 | Marine spiral line type guide pipe fin |
| CN114379752A (en) * | 2021-12-09 | 2022-04-22 | 南通海国机械有限公司 | Leading guide pulley of prewhirling for boats and ships |
| CN115071938A (en) * | 2022-06-29 | 2022-09-20 | 广船国际有限公司 | Front-mounted energy-saving device |
| CN115056950A (en) * | 2022-07-15 | 2022-09-16 | 上海外高桥造船有限公司 | Paddle adjusting component and ship |
| CN117622442A (en) * | 2024-01-26 | 2024-03-01 | 江苏扬子鑫福造船有限公司 | Hydrodynamic energy-saving twisted fin structure in front of propeller |
| CN117622442B (en) * | 2024-01-26 | 2024-04-05 | 江苏扬子鑫福造船有限公司 | Hydrodynamic energy-saving twisted fin structure in front of propeller |
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Address after: Room 312, 313, 189 Kaohsiung Road, Huangpu District, Shanghai 200011 Applicant after: China Shipbuilding (Shanghai) Energy Conservation Technology Co.,Ltd. Address before: Room 312, 313, 189 Kaohsiung Road, Huangpu District, Shanghai 200011 Applicant before: CSIC (SHANGHAI) ENERGY SAVING TECHNOLOGY DEVELOPMENT CO.,LTD. |
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