CN212149255U - 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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- CN212149255U CN212149255U CN202020268018.0U CN202020268018U CN212149255U CN 212149255 U CN212149255 U CN 212149255U CN 202020268018 U CN202020268018 U CN 202020268018U CN 212149255 U CN212149255 U CN 212149255U
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Abstract
The utility model provides a leading guide pulley and boats and ships of prewhirling of offset type, including arc pipe, connecting piece and stator. 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 utility model relates to a boats and ships power energy-saving field especially relates to a leading guide pulley of prewhirling of offset type and boats and ships.
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 pulley, and it comprises leading half pipe and a plurality of leading guide vane, with the utility model discloses compare, the pipe opening of this type guide pulley down, the stator only distributes in the inboard of pipe, has obvious difference in the appearance, and this type guide pulley is not good to the ship type energy-conserving effect of the stern linetype of thin cutting simultaneously.
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 utility model, the guide opening of the guide wheel faces downwards, the guide vane is only distributed on the inner side of the guide pipe, and obvious difference exists in the appearance.
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 utility model, the pipe of this type guide pulley does not have opening or opening down, and the pipe can produce great resistance, and the stator is arranged position and form and also has great difference.
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.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a leading guide pulley and boats and ships of prewhirling of offset formula to it is too big to solve current guide pulley resistance of prewhirling, is difficult to the propulsive efficiency of promotion ship.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model discloses a leading guide pulley of prewhirling of offset type, include: 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.
The offset type prepositioned pre-rotation guide wheel of the utility model has the advantages that 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.
The offset type prepositioned pre-rotation guide wheel of the utility model is characterized in that 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.
The offset type prepositive pre-rotation guide wheel of the utility model has the longitudinal inclination angle of the arc-shaped conduit ranging from-5 degrees to 10 degrees and the transverse inclination angle of the arc-shaped conduit ranging from-10 degrees to 10 degrees.
The utility model discloses a leading guide pulley of prewhirling of offset, first stator with the circumference angle scope of the midline face of hull is-80 ~ -10.
The utility model discloses a leading guide pulley of prewhirling of offset, the second stator with the circumference angle scope of the midline face of hull is 10 ~ 70.
The utility model discloses a leading guide pulley of prewhirling of offset, the third stator with the circumference angle scope of the midline face of hull is 40 ~ 100.
The utility model discloses a leading guide pulley of prewhirling of offset, the fourth stator with the circumference angle scope of the midline face of hull is 70 ~ 130.
The utility model discloses a leading guide pulley of prewhirling of offset, first stator with the absolute value of the circumference angle scope of the midline of hull is less than the fourth stator the absolute value of the circumference angle scope of the midline of hull.
The utility model discloses a leading guide pulley of prewhirling of offset type, the chord length of arc pipe does 0.15 ~ 0.30 times of screw diameter.
The utility model discloses a leading guide pulley of prewhirling of offset type, the export diameter of arc pipe is 0.40 ~ 0.70 times of screw diameter, the entry diameter of arc pipe is 0.45 ~ 0.80 times of screw diameter, just the export diameter is less than the entry diameter.
The utility model discloses a leading guide pulley of prewhirling of offset type, first stator with arc pipe connection department the chord length of first stator is less than or equal to first stator with arc pipe connection department the chord length of arc pipe.
The utility model discloses a ship is provided with above-mentioned arbitrary one the leading guide pulley of prewhirling of offset type.
The utility model discloses owing to adopt above technical scheme, make it compare with prior art and have following advantage and positive effect:
1. the utility model discloses an embodiment is connected to the stern through passing through the connecting piece with the arc pipe to be connected with guide vane portion between arc pipe and stern, make the arc pipe can carry out the prerotation to the rivers that get into the screw. 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. The utility model discloses an embodiment is through setting up first stator unit and second stator unit and connecting first pipe section and second pipe section respectively, when producing with screw rotation direction opposite's rotatory rivers (especially second stator unit), has strengthened the joint strength of guide pulley and hull.
Drawings
Fig. 1 is a front view schematic diagram of a marine offset type prepositioned pre-rotation guide wheel provided by the utility model;
fig. 2 is a left-side view schematic diagram of the offset type prepositioned pre-rotation guide wheel for the ship provided by the utility model;
fig. 3 is a schematic right view of the offset type prepositioned pre-rotation guide wheel for a ship according to the present invention;
fig. 4 is a three-dimensional schematic view of a marine offset type prepositioned pre-rotation guide wheel provided by the utility model;
fig. 5 is a three-dimensional schematic view of the offset pre-rotation guide wheel when the longitudinal inclination angle of the guide tube of the present invention is 0 ° and the transverse inclination angle is-5 °;
FIG. 6 is a three-dimensional schematic view of the offset pre-rotation guide wheel of the present invention when the longitudinal inclination angle of the guiding tube is 6 ° and the lateral inclination angle is-5 °;
fig. 7 is a three-dimensional schematic view of the offset pre-rotation guide wheel of the second guide vane unit of the present invention passing through and connected to the second conduit section;
fig. 8 is a three-dimensional schematic view of the offset type prepositioned pre-rotation guide wheel of the second guide vane, the third guide vane and the fourth guide vane which have chord lengths larger than that of the arc-shaped guide duct.
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 the embodiments of the offset pre-rotation guide wheel and the ship will be described with reference to the accompanying drawings, which are only used for illustrating the present invention and are not intended to limit the scope of the present invention, and modifications of various equivalent forms of the present invention by those skilled in the art will fall within the scope defined by 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 may 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 is welded and fixed to the tail of the ship body 07. Circumferential angle α of first guide vane 05 to the mean line plane of hull 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 mean line plane of hull 073The range may be 10 deg. -70 deg. (anticlockwise with no choking of the flow field, required to arrange for maintaining vane spacing). Circumferential angle α of third guide vane 03 to the mean line plane of hull 072Ranging from 40 to 100 (arrangement required to maintain vane spacing, unobstructed flow field). Circumferential angle α of fourth guide vane 02 to the mean line plane of 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 centerline plane of the hull 07 is set4The absolute value of the range is less than the circumferential angle alpha 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 details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020268018.0U CN212149255U (en) | 2020-03-06 | 2020-03-06 | Offset type front-mounted pre-rotation guide wheel and ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020268018.0U CN212149255U (en) | 2020-03-06 | 2020-03-06 | Offset type front-mounted pre-rotation guide wheel and ship |
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| Publication Number | Publication Date |
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| CN212149255U true CN212149255U (en) | 2020-12-15 |
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| CN202020268018.0U Active CN212149255U (en) | 2020-03-06 | 2020-03-06 | Offset type front-mounted pre-rotation guide wheel and ship |
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Address after: Room 312, 313, 189 Kaohsiung Road, Huangpu District, Shanghai 200011 Patentee after: China Shipbuilding (Shanghai) Energy Conservation Technology Co.,Ltd. Address before: Room 312, 313, 189 Kaohsiung Road, Huangpu District, Shanghai 200011 Patentee before: CSIC (SHANGHAI) ENERGY SAVING TECHNOLOGY DEVELOPMENT CO.,LTD. |
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