阅读说明：本技术 一种偏置式前置预旋导轮及船舶 (Offset type front-mounted pre-rotation guide wheel and ship ) 是由 陈雷强 黄国富 黄树权 黄振宇 吴赞 夏灏超 郭峰山 严周广 赵璐 李鹏程 张宁 于 2020-03-06 设计创作，主要内容包括：本发明提供一种偏置式前置预旋导轮及船舶,包括弧形导管、连接件和导叶部。连接件用于连接弧形导管与船体尾部,导叶部则连接于弧形导管和船体尾部。定义船体在螺旋桨旋向对应的舷侧为第一舷侧,另一侧为第二舷侧。对应第一舷侧部分的弧形导管的端面设置为高于对应第二舷侧部分的弧形导管的端面。第二舷侧的导叶部呈放射形分布弧形导管的内侧和外侧,可有效加强水流的预旋作用,提高船的推进效率。通过去除第一舷侧部分弧形导管的不对称设计方式,并设置弧形导管纵倾和横倾角度,有效减小第一舷侧处弧形导管引起的阻力,解决了船体由于导管阻力导致推进效率低的问题。同时,减小了该处桨叶工作负荷,降低了脉动力能级。(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.)

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.

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.