CN111746749A - Rudder propeller matching system - Google Patents

Rudder propeller matching system Download PDF

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Publication number
CN111746749A
CN111746749A CN202010572842.XA CN202010572842A CN111746749A CN 111746749 A CN111746749 A CN 111746749A CN 202010572842 A CN202010572842 A CN 202010572842A CN 111746749 A CN111746749 A CN 111746749A
Authority
CN
China
Prior art keywords
rudder
propeller
cap
ball
matching system
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
Application number
CN202010572842.XA
Other languages
Chinese (zh)
Inventor
王忠强
姜志强
赵志华
吴安
宋锋
李永福
喻义华
童南汨
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hudong Zhonghua Shipbuilding Group Co Ltd
Original Assignee
Hudong Zhonghua Shipbuilding Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hudong Zhonghua Shipbuilding Group Co Ltd filed Critical Hudong Zhonghua Shipbuilding Group Co Ltd
Priority to CN202010572842.XA priority Critical patent/CN111746749A/en
Publication of CN111746749A publication Critical patent/CN111746749A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
    • B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
    • B63B1/38—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/06—Steering by rudders
    • B63H25/38—Rudders
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/10—Measures concerning design or construction of watercraft hulls

Abstract

The invention discloses a rudder matching system which comprises a rudder arranged below a false rudder, a rudder ball fixed on the front end surface of the rudder, a propeller positioned on the same horizontal line with the rudder ball and a reduction gear box connected with the propeller through a tail shaft, wherein a propeller cap is arranged at the tail end of the propeller, a gap is formed between the propeller cap and the rudder ball, and the shape of the surface of the propeller cap facing the rudder ball is matched with the linear shape of the rudder ball. The invention avoids the generation of cavitation bubbles, avoids instant impact and corrosion caused by the destruction of the cavitation bubbles, and prolongs the service life of the rudder and the propeller.

Description

Rudder propeller matching system
Technical Field
The invention relates to the technical field of ship construction, in particular to a rudder paddle matching system.
Background
The rudder is a device for ensuring the maneuverability of straight sailing, steering, turning around, reverse sailing and the like of the ship, and the propeller is a propulsion device for ensuring the sailing of the ship.
The combination of a semi-suspended rudder and a conventional propeller is a standard configuration for vessel steering and propulsion systems. The semi-suspension rudder needs to be provided with a rudder horn, and the rudder horn belongs to an immovable part, so that the actual effect on the maneuverability of the ship is limited. Furthermore, the propeller rotating at high speed throws a large amount of water out to the stern, and the space of the propeller changing with the displacement of the ship makes the surrounding liquid not to be supplemented, so that a partial vacuum area is formed on the back surface of the propeller and the surface of the rudder. The liquid around the vacuum region boils and vaporizes due to the low pressure, forming cavitation bubbles. And cavitation is also easily generated at the gap between the rudder and the rudder horn. The collapse of the cavitation will cause instantaneous impact and corrosion, affecting the useful life of the rudder and propeller. Meanwhile, once cavitation is generated during the ship sailing, a large amount of propulsion energy is consumed, and thus the propulsion efficiency is affected.
Disclosure of Invention
In view of this, the invention provides a rudder propeller matching system, which overcomes the problems of poor ship maneuvering performance, easy cavitation corrosion, influence on the propulsion efficiency of a propeller and the like caused by the combination of the semi-suspended rudder and a conventional propeller, and can reduce the weight of a rudder system, improve the maneuvering performance of a ship, avoid cavitation corrosion and effectively improve the propulsion efficiency of the ship.
The utility model provides a rudder oar matching system, is including setting up at the rudder of false rudder below, fixing rudder bulb on the preceding terminal surface of rudder, be in same water flat line with the rudder bulb on the screw and through the reduction gear case that tail shaft and screw link to each other, the oar cap is installed to the tail end of screw, is provided with the clearance between oar cap and the rudder bulb, the shape of the face towards the rudder bulb of oar cap and the line type phase-match of rudder bulb.
Preferably, the surface of the paddle cap facing the rudder ball is a concave spherical surface.
Preferably, the propeller cap comprises a concave spherical surface, a transition part extending from the edge of the concave spherical surface to the head end direction of the propeller, and a U-shaped fixing part extending from the transition part, and the U-shaped fixing part of the propeller cap is fixed on the hub of the propeller through a fastener.
Preferably, the thickness of the concave spherical surface of the paddle cap is gradual.
Preferably, the thickness of the concave spherical surface of the paddle cap becomes gradually thinner from the edge to the middle.
Preferably, the clearance between the paddle cap and the rudder ball is 15mm-25 mm.
Preferably, the rudder is a fully-suspended rudder, the rudder is connected with the steering engine through a rudder stock, and a guide edge of the rudder is in a twisted line shape.
Preferably, the leading edge of the rudder is gradually offset from the left side of the rudder body center line to the right side of the rudder body center line in the height direction of the rudder.
The invention has the beneficial effects that:
1. through the tail end installation oar cap at the screw, can avoid forming the vacuum area between screw afterbody and the rudder to avoid the production of cavitation, avoid the cavitation to destroy impact and corruption in the twinkling of an eye that causes, improved the life of rudder and screw.
2. The propeller can drive water flow to rotate to push water backwards while obtaining thrust, about 15% -30% of total energy of the propeller remains in the wake field in the form of kinetic energy, so that the rudder and the wake field behind the propeller are more fully matched, partial residual energy in the wake can be absorbed, the propelling efficiency of the ship is improved, and 2-3% of fuel is saved.
3. Set up the leading edge of rudder into the distortion type line type, can effectual reduction rivers at the speed loss of rudder leading edge department for the rivers that the screw was thrown away can be more smooth and straight through the rudder surface, with the loss of reduction pressure, have further avoided the vacuole to produce.
4. The rudder of the invention adopts a full suspension type rudder, so that a rudder arm can be saved, thereby enlarging the movable part of the rudder, and reducing the rudder area under the condition of meeting the same ship maneuverability, thereby saving about 30 percent of rudder system weight, reducing the weight of an empty ship and increasing the cargo capacity of the ship.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of the matching relationship between the rudder ball and the paddle cap.
Fig. 3 is a schematic view of a twisted pattern of the leading edge of the rudder.
Fig. 4 is a cross-sectional view taken along line a-a in fig. 3 (a schematic view of the rudder leading edge being offset to the left of the rudder body center line).
Fig. 5 is a cross-sectional view taken along line B-B of fig. 3 (a schematic view of the rudder leading edge being offset to the right of the rudder body centerline).
Figure 6 is a cross-sectional view of the paddle cap.
Figure 7 is a view of the paddle cap from the stern to the bow.
The reference numerals in the figures have the meaning:
the rudder comprises a 1-rudder, a 2-rudder ball, a 3-rudder stock, a 4-false rudder, a 5-steering engine, a 6-propeller, a 7-propeller cap, an 8-tail shaft, a 9-reduction gear box, a 10-concave spherical surface, an 11-transition part and a 12-U-shaped fixing part.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described with reference to the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
In the first embodiment, the invention provides a rudder propeller matching system which comprises a rudder 1, a rudder ball 2, a propeller 6 and a reduction gear box 9.
The rudder 1 is a fully-suspended rudder and is arranged below the false rudder 4, and the rudder 1 is connected with the steering engine 5 through a rudder stock 3. The rudder 1 is a fully suspended rudder, so that a rudder arm can be omitted, a movable part of the rudder is enlarged, and the rudder area can be reduced under the condition of meeting the same ship maneuverability, so that about 30% of rudder system weight can be saved, the empty ship weight is reduced, and the cargo capacity of the ship is increased.
The leading edge of the rudder 1 is arranged in a twisted type line. Preferably, the leading edge of the rudder 1 is gradually offset from the left side of the rudder body center line to the right side of the rudder body center line in the height direction of the rudder 1.
Set up the leading edge of rudder 1 into the type of twisting line, can effectively reduce the velocity loss of rivers at rudder 1 leading edge department for the rivers that screw 6 was thrown off can be more smooth surface through rudder 1, with the loss of reduction pressure, thereby avoided the cavitation to produce.
The rudder ball 2 is fixed on the front end surface of the rudder 1, and the rudder ball and the rudder 1 are in rigid connection. The rudder ball 2 is on the same horizontal line as the propeller 6. The head end of the propeller 6 is connected with a reduction gear box 9 through a tail shaft 8, a propeller cap 7 is installed at the tail end of the propeller 6, a 15-25 mm gap is arranged between the propeller cap 7 and the rudder ball 2, and the shape of the surface of the propeller cap 7 facing the rudder ball is matched with the line type of the rudder ball 2.
The propeller cap is arranged at the tail end of the propeller 6, so that a vacuum area can be prevented from being formed between the tail of the propeller 6 and the rudder 1, the generation of cavitation bubbles is avoided, the instantaneous impact and corrosion caused by the cavitation bubbles are avoided, and the service lives of the rudder 1 and the propeller 6 are prolonged.
In this embodiment, the surface of the paddle cap 7 facing the rudder ball is a concave spherical surface, and the thickness of the concave spherical surface of the paddle cap 7 is gradually changed. Preferably, the concave spherical surface of the paddle cap 7 has a thickness that gradually becomes thinner from the edge toward the middle.
In the second embodiment, the invention provides a rudder propeller matching system which comprises a rudder 1, a rudder ball 2, a propeller 6 and a reduction gear box 9.
The rudder 1 is a fully-suspended rudder and is arranged below the false rudder 4, and the rudder 1 is connected with the steering engine 5 through a rudder stock 3. The rudder 1 is a fully suspended rudder, so that a rudder arm can be omitted, a movable part of the rudder is enlarged, and the rudder area can be reduced under the condition of meeting the same ship maneuverability, so that about 30% of rudder system weight can be saved, the empty ship weight is reduced, and the cargo capacity of the ship is increased.
The leading edge of the rudder 1 is arranged in a twisted type line. Preferably, the leading edge of the rudder 1 is gradually offset from the left side of the rudder body center line to the right side of the rudder body center line in the height direction of the rudder 1.
Set up the leading edge of rudder 1 into the type of twisting line, can effectively reduce the velocity loss of rivers at rudder 1 leading edge department for the rivers that screw 6 was thrown off can be more smooth surface through rudder 1, with the loss of reduction pressure, thereby avoided the cavitation to produce.
The rudder ball 2 is fixed on the front end surface of the rudder 1, and the rudder ball and the rudder 1 are in rigid connection. The rudder ball 2 is on the same horizontal line as the propeller 6. The head end of the propeller 6 is connected with a reduction gear box 9 through a tail shaft 8, a propeller cap 7 is installed at the tail end of the propeller 6, a 15-25 mm gap is arranged between the propeller cap 7 and the rudder ball 2, and the shape of the surface of the propeller cap 7 facing the rudder ball is matched with the line type of the rudder ball 2.
The propeller cap 7 is arranged at the tail end of the propeller 6, so that a vacuum area can be prevented from being formed between the tail of the propeller 6 and the rudder 1, the generation of cavitation bubbles is avoided, the instant impact and corrosion caused by the cavitation bubbles are avoided, and the service lives of the rudder and the propeller 6 are prolonged.
In this embodiment, the paddle cap 7 includes a concave spherical surface 10, a transition portion 11 extending from an edge of the concave spherical surface 10 in a direction toward a head end of the propeller 6, and a U-shaped fixing portion 12 extending from the transition portion 11, and the U-shaped fixing portion of the paddle cap 7 is fixed to a hub of the propeller 6 by a fastener.
The thickness of the concave spherical surface 10 of the paddle cap 7 is gradually changed. Preferably, the concave spherical surface 10 of the paddle cap tapers in thickness from the edge towards the middle.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (8)

1. The rudder propeller matching system is characterized by comprising a rudder arranged below a false rudder, a rudder ball fixed on the front end surface of the rudder, a propeller positioned on the same horizontal line with the rudder ball and a reduction gear box connected with the propeller through a tail shaft, wherein a propeller cap is arranged at the tail end of the propeller, a gap is formed between the propeller cap and the rudder ball, and the shape of the surface of the propeller cap facing the rudder ball is matched with the linear shape of the rudder ball.
2. Rudder propeller matching system according to claim 1, characterised in that the rudder ball facing surface of the propeller cap is a concave spherical surface.
3. Rudder propeller matching system according to claim 1, characterised in that the cap comprises a concave spherical surface, a transition part extending from the edge of the concave spherical surface in the direction of the head end of the propeller, and a U-shaped fixing part extending from the transition part, which U-shaped fixing part of the cap is fixed to the hub of the propeller by means of a fastening element.
4. Rudder paddle matching system according to claim 2 or 3, characterised in that the thickness of the concave spherical surface of the paddle cap is gradual.
5. Rudder paddle matching system according to claim 4, wherein the concave spherical surface of the paddle cap tapers in thickness from the edge towards the middle.
6. Rudder paddle matching system according to claim 1, characterised in that the gap between the paddle cap and the rudder ball is 15-25 mm.
7. The rudder propeller matching system according to claim 1, wherein the rudder is a fully suspended rudder, the rudder is connected to the steering engine through a rudder stock, and a leading edge of the rudder is provided in a twisted linear shape.
8. Rudder propeller matching system according to claim 7 where the leading edge of the rudder is gradually offset from the left side of the rudder body centre line to the right side of the rudder body centre line in the rudder height direction.
CN202010572842.XA 2020-06-22 2020-06-22 Rudder propeller matching system Pending CN111746749A (en)

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Application Number Priority Date Filing Date Title
CN202010572842.XA CN111746749A (en) 2020-06-22 2020-06-22 Rudder propeller matching system

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Application Number Priority Date Filing Date Title
CN202010572842.XA CN111746749A (en) 2020-06-22 2020-06-22 Rudder propeller matching system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112550637A (en) * 2020-12-07 2021-03-26 沪东中华造船(集团)有限公司 Ship rudder bearing wharf maintenance and replacement method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004299420A (en) * 2003-03-28 2004-10-28 Mitsui Eng & Shipbuild Co Ltd Rudder with fin and vessel
CN1689912A (en) * 2004-04-23 2005-11-02 贝克船舶系统有限及两合公司 Ship rudder
CN101184663A (en) * 2005-04-20 2008-05-21 罗尔斯-罗伊斯股份公司 A propulsion and steering arrangement for a ship
KR20130036967A (en) * 2011-10-05 2013-04-15 삼성중공업 주식회사 Ship having a rudder with a rudder bulb
CN108622357A (en) * 2018-05-11 2018-10-09 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） Hang paddle arm formula to rotary device, to transfer from one department to another system and ship

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004299420A (en) * 2003-03-28 2004-10-28 Mitsui Eng & Shipbuild Co Ltd Rudder with fin and vessel
CN1689912A (en) * 2004-04-23 2005-11-02 贝克船舶系统有限及两合公司 Ship rudder
CN101184663A (en) * 2005-04-20 2008-05-21 罗尔斯-罗伊斯股份公司 A propulsion and steering arrangement for a ship
KR20130036967A (en) * 2011-10-05 2013-04-15 삼성중공업 주식회사 Ship having a rudder with a rudder bulb
CN108622357A (en) * 2018-05-11 2018-10-09 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） Hang paddle arm formula to rotary device, to transfer from one department to another system and ship

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112550637A (en) * 2020-12-07 2021-03-26 沪东中华造船(集团)有限公司 Ship rudder bearing wharf maintenance and replacement method
CN112550637B (en) * 2020-12-07 2021-11-02 沪东中华造船(集团)有限公司 Ship rudder bearing wharf maintenance and replacement method

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Application publication date: 20201009