CN87216893U - Combined energy-saving device of compensating conduct tube and flow-guiding cover for ships - Google Patents
Combined energy-saving device of compensating conduct tube and flow-guiding cover for ships Download PDFInfo
- Publication number
- CN87216893U CN87216893U CN 87216893 CN87216893U CN87216893U CN 87216893 U CN87216893 U CN 87216893U CN 87216893 CN87216893 CN 87216893 CN 87216893 U CN87216893 U CN 87216893U CN 87216893 U CN87216893 U CN 87216893U
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- diameter
- propeller
- compensating
- ships
- flow
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Abstract
The utility model relates to an energy-saving device of the tail part of the ships, which is composed of a flow-guiding cover and a compensating conduct tube, wherein, the flow-guiding cover is positioned on the centerline of a propeller shaft; the diameter of the flow-guiding cover is 1.05-1.35 times as long as the hub diameter of a propeller, and the length of the flow-guiding cover is 2.6-3.1 times as long as the diameter of the flow-guiding cover. The compensating conduct tube is formed from a right half ring and a left half ring which are arranged on both sides of the front longitudinal center-plane of the tail propeller and arranged slantingly above the propeller shaft; the short diameter of the compensating conduct tube is 0.3-0.5 times as long as the propeller diameter, and the long diameter of the compensating conduct tube is 0.65-0.85 times as long as the propeller diameter. The utility model has the advantages of simple structure, convenient process and installation, easy maintenance, low investment and good effect of saving energy. A ship model test indicates that the utility model can make the ships save energy by 6-9.5%.
Description
The utility model is a kind of boats and ships afterbody energy saver.
Existing ship afterbody energy saver has rotating energy in the recyclable propeller races such as back fixed guide vane, reaction rudder, rudder additionaling thrust manch, but energy-saving effect is not remarkable, how at 3-6%.Though guide wheel propelling unit energy-saving effect can reach 5-15%, (general ton ship increases by ten thousand yuan of investment 20-25 approximately but initial cost is big, the price of a suitable screw propeller), and increase the axle load of screw propeller, amount of deflection is increased, corresponding adding according to the tranverse bending vibration,, processing requires also higher with mounting process.
The simple and easy compensating duct energy saver of the streamlined reefer housing thrust fin combined energy-saving equipment of 708 Research Institute and marine propeller, and successively declared invention and utility model patent (application number is respectively 86108092 and 87204866), can reach the effect of energy-conservation 7-14% and 6-7.4%.But the combined energy-saving equipment of utilization compensating duct and streamlined reefer housing did not at home and abroad use as yet.
Task of the present utility model is remarkable, simple in structure, the installation and processing of a kind of energy-saving effect of development and maintenance is convenient, investment is little compensating duct and streamlined reefer housing combined energy-saving equipment.
Compensating duct can quicken the flow velocity of screw propeller top current, makes more water evenly enter the oar card, improves propulsion coefficient; Also can produce thrust simultaneously and reduce afterbody the flow separation phenomenon, reduce form resistance.Mozzle has been filled the meiobar behind the propeller hub cap, reduce the eddy current centnifugal force, play the wake flow valve action, when reducing the propeller hub viscosity drag, also make compensating duct bring into play better effect, promptly produce favourable interference each other, can give full play to potential advantages, further improve the propulsion of ship performance at compensating duct and streamlined reefer housing combination back.
The utility model is by streamlined reefer housing (2), and compensating duct (3) is formed (seeing accompanying drawing), and streamlined reefer housing (2) is installed on the rudder (1), and when rudder angle was 0, its line of centers overlapped with the propeller center line.Compensating duct (3) be about two semi-rings, be loaded on vertical midship section both sides before the stern oar, be offset to oar axle top, the oblique back upper place of its line of centers is arranged.Also left semi-ring compensating duct can be only adorned for the dextrorotation oar, also right semi-ring compensating duct can be only adorned for left-handed oar.
Streamlined reefer housing and compensating duct adopt the reinforced rib framed plate structure, are intended to expendable weight, proof strength, shortening process-cycle, reduce cost.The also available steel casting of its structure processes, but the process-cycle is long, expense is higher.Structural materials adopts common ship steel.
Streamlined reefer housing and compensating duct structurally will guarantee continuously.Processing should be adopted moulding bed with installation, wants controlled deformation during welding, to guarantee setting accuracy.
The size of compensating duct is relevant with diameter of propeller, and its stagger angle is relevant with hull afterbody line style and propeller load, and the available model self-propulsion test is determined.The minor axis of general indemnity conduit is 0.3-0.5 a times of diameter of propeller, major diameter is 0.65-0.85 a times of diameter of propeller, conduit tangent plane chord length is 0.3-0.5 a times of its minor axis, the thickness of conduit tangent plane is 0.12-0.18 times of its chord length, tangent plane adopts airfoil to be reduced to the knuckle line style, or adopts the NACA airfoil.
The angle of throat δ of compensating duct is 6 °-15 °, α, β, three stagger angles of γ, and left and right sides semi-ring is inequality.Left side α is 3 °-11 °, and β is 0.5 °-8 °, and γ is-2 °-10 °, and right side α is 4 °-10 °, and β is 2 °-9 °, and γ is-2 °-10 °, and rear end of conduit to the distance of propeller blade 0.8 chi leading edge is a 0.1-0.3 diameter of propeller doubly.
The oad of streamlined reefer housing and screw propeller yardstick, ship speed are relevant, the diameter of general streamlined reefer housing be the screw propeller hub diameter 1.05-1.35 doubly, streamlined reefer housing length be 2.6-3.1 times of its diameter.Its maximum section place to the distance of guide lug is the 30-45% of streamlined reefer housing length.
The utility model is by the model test of ten ships, and its energy-saving effect reaches 6-9.5%.
Boats and ships are plentiful more, and the effect of prosthetics conduit, streamlined reefer housing composite set is good more.This is because loose ship wake field is inhomogeneous and serious flow separation phenomenon arranged.
With 19900 tons of oil carriers is example, install the utility model additional after, when the speed of a ship or plane is constant, main engine power is 6594 horsepowers boats and ships, the effect of energy saver is as improving 2%, but every year more than 60 ton of more piece oil, but boats and ships use ton surplus 20 years more piece oil 1200.The utility model installs expense additional and adds up to about 35000 yuan, and initial cost is promptly recyclable in half a year.Calculate according to 6 ships, be 4 months to 8 months the payback period of installing expense additional.
Description of drawings:
Fig. 1 is compensating duct, streamlined reefer housing composite set longitudinal section
Fig. 2 is the compensating duct horizontal cross
Among the figure 1, rudder; 2, streamlined reefer housing; 3, compensating duct
Claims (6)
1, boats and ships afterbody energy saver, its technical characterictic is:
(a), the streamlined reefer housing behind the propeller hub becomes fabricate block with stern oar precompensation catheter-shaped,
(b), streamlined reefer housing is installed on the rudder, when rudder angle was 0, its line of centers overlapped with the propeller center line,
(c), vertical midship section both sides were offset to oar axle top, the oblique rear of its line of centers before compensating duct was loaded on the stern oar.
2, by the described boats and ships afterbody of claim 1 energy saver, its technical characterictic is that the diameter of streamlined reefer housing is 1.05-1.35 a times of screw propeller hub diameter, streamlined reefer housing length is 2.6-3.1 times of its diameter, and its maximum section place to the distance of guide lug is the 30-45% of streamlined reefer housing length.
3, by the described boats and ships afterbody of claim 1 energy saver, its technical characterictic is that the minor axis of compensating duct is 0.3-0.5 a times of diameter of propeller, and major diameter is 0.65-0.85 a times of diameter of propeller.
4, by the described boats and ships afterbody of claim 1 energy saver, its technical characterictic is that the compensating duct tangent plane adopts the knuckle airfoil, and conduit tangent plane chord length is 0.3-0.5 a times of minor axis, and the thickness of conduit tangent plane is the long 0.12-0.18 of the side of a ship times.
5, by the described boats and ships afterbody of claim 1 energy saver, its technical characterictic is that the distance of compensating duct rear end to propeller blade 0.8R place leading edge is a 0.1-0.3 diameter of propeller doubly.
6, by the described boats and ships afterbody of claim 1 energy saver, its technical characterictic is that the angle of throat δ of compensating duct is 6 °-15 °, and the conduit stagger angle α of left semi-ring is 3 °-11 °, and β is 0.5 °-8 °, and γ is-2 °-10 °; The conduit stagger angle α of right semi-ring is 4 °-10 °, and β is 2 °-9 °, and γ is-2 °-10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87216893 CN87216893U (en) | 1987-12-31 | 1987-12-31 | Combined energy-saving device of compensating conduct tube and flow-guiding cover for ships |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87216893 CN87216893U (en) | 1987-12-31 | 1987-12-31 | Combined energy-saving device of compensating conduct tube and flow-guiding cover for ships |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87216893U true CN87216893U (en) | 1988-10-12 |
Family
ID=4830758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87216893 Expired - Lifetime CN87216893U (en) | 1987-12-31 | 1987-12-31 | Combined energy-saving device of compensating conduct tube and flow-guiding cover for ships |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87216893U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105829205A (en) * | 2013-12-16 | 2016-08-03 | 国立研究开发法人海上·港湾·航空技术研究所 | Stern duct, stern attachment, method of designing stern duct, and ship equipped with stern duct |
| CN106043641A (en) * | 2016-07-06 | 2016-10-26 | 中船重工（上海）节能技术发展有限公司 | Annular flow guide gate for ship |
| CN108128404A (en) * | 2017-12-11 | 2018-06-08 | 中国船舶工业集团公司第七0八研究所 | One kind is used for the pinpoint experimental rig of paddle precompensation conduit and installation method |
| CN109606596A (en) * | 2018-11-29 | 2019-04-12 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Energy saving half guide wheel before a kind of paddle |
| CN112124542A (en) * | 2020-09-23 | 2020-12-25 | 宜昌一凡船舶设计有限公司 | Ship hydrodynamic comprehensive energy-saving device and installation method |
-
1987
- 1987-12-31 CN CN 87216893 patent/CN87216893U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105829205A (en) * | 2013-12-16 | 2016-08-03 | 国立研究开发法人海上·港湾·航空技术研究所 | Stern duct, stern attachment, method of designing stern duct, and ship equipped with stern duct |
| CN106043641A (en) * | 2016-07-06 | 2016-10-26 | 中船重工（上海）节能技术发展有限公司 | Annular flow guide gate for ship |
| CN108128404A (en) * | 2017-12-11 | 2018-06-08 | 中国船舶工业集团公司第七0八研究所 | One kind is used for the pinpoint experimental rig of paddle precompensation conduit and installation method |
| CN108128404B (en) * | 2017-12-11 | 2019-03-22 | 中国船舶工业集团公司第七0八研究所 | One kind being used for the pinpoint experimental rig of paddle precompensation conduit and installation method |
| CN109606596A (en) * | 2018-11-29 | 2019-04-12 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Energy saving half guide wheel before a kind of paddle |
| CN112124542A (en) * | 2020-09-23 | 2020-12-25 | 宜昌一凡船舶设计有限公司 | Ship hydrodynamic comprehensive energy-saving device and installation method |
| CN112124542B (en) * | 2020-09-23 | 2022-04-15 | 宜昌一凡船舶设计有限公司 | Ship hydrodynamic comprehensive energy-saving device and installation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |