CN202226041U - Twin-screw propulsion device for ship - Google Patents
Twin-screw propulsion device for ship Download PDFInfo
- Publication number
- CN202226041U CN202226041U CN2011202889430U CN201120288943U CN202226041U CN 202226041 U CN202226041 U CN 202226041U CN 2011202889430 U CN2011202889430 U CN 2011202889430U CN 201120288943 U CN201120288943 U CN 201120288943U CN 202226041 U CN202226041 U CN 202226041U
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- Prior art keywords
- screw propeller
- screw
- propeller
- ship
- main
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- Expired - Fee Related
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Abstract
The utility model relates to a ship propulsion device, and in particular relates to improvement of a screw propulsion device for a ship. The twin-screw propulsion device for the ship comprises a screw propeller base and a main screw propeller which is arranged on the screw propeller base in a rotatable way by virtue of a transmission device, wherein an auxiliary screw propeller is arranged on the screw propeller base, and is positioned behind the main screw propeller; the axial line of the auxiliary screw propeller is parallel to and close to that of the main screw propeller; the rotating direction of the vane of the auxiliary propeller is opposite to that of the vane of the main screw propeller; and the diameter of the auxiliary screw propeller is less than that of the main screw propeller. According to the twin-screw propulsion device for the ship, influence of spiral water flow on a shipping and steering device of the ship can be better eliminated or reduced, thus normal shipping of the ship can be guaranteed.
Description
Technical background:
The utility model relates to marine propulsion, relates in particular to the improvement of propeller for vessels propelling unit.
Background technology:
Propeller plant is used to promote current and the antagonistic force that obtains to make boats and ships to advance; Owing between the rotation direction of the blade of screw propeller and the propeller axis angle is arranged; So screw propeller when rotation, the state that the current that promoted by propeller blade move after twist is because the back of propeller blade is equipped with rudder blade (direction of pointing to stem with screw propeller is the place ahead); The flow action that moves after the helix can cause the force unbalance that receives of rudder blade both sides to the rudder blade; Thereby how safe navigation that influences boats and ships and the wearing and tearing that increase rudder bearer, rudder stock are eliminated or are reduced the influence of spiral water flow to ship's navigation and rudder gear, still do not have solution preferably at present.
The utility model content:
To the above-mentioned deficiency of existing in prior technology, the purpose of the utility model is that a kind of twin screw propelling unit peculiar to vessel will be provided, and it can eliminate or reduce the influence of spiral water flow to ship's navigation and rudder gear preferably, guarantees that boats and ships normally navigate by water.
The scheme that the utility model solves its technical matters is: twin screw propelling unit peculiar to vessel; Comprise the screw propeller seat and through the rotating main screw that is installed on the said screw propeller seat of driving device; A secondary screw propeller also is installed on described screw propeller seat; This pair screw propeller is positioned at the back of said main screw; And the axis of said secondary screw propeller and the parallel axes of said main screw and near, the rotation direction of the rotation direction of the blade of said secondary screw propeller and the blade of said main screw is opposite, the diameter of said secondary screw propeller is less than the diameter of said main screw.
After adopting such scheme; Because the screw propeller seat is fixedly connected on the hull, the back of main screw is equipped with secondary screw propeller, and the parallel axes of the axis of secondary screw propeller and main screw and near; The rotation direction of the rotation direction of the blade of secondary screw propeller and the blade of main screw is opposite; Main screw and secondary screw propeller be by separately actuator drives, when real boatman does, and the rotation direction of secondary screw propeller and the direction of rotation of main screw.Thereby secondary screw propeller can give reverse screw with the current that move after a part of helix and correct, and continues promoting behind the current direction.Because the diameter of secondary screw propeller is less than the diameter of main screw; So the current that move after the helix of current that move after the helix after correcting and not rectification work together on the rudder blade; The rotating speed of the secondary screw propeller of choose reasonable can make the hydraulic pressure of rudder blade both sides in a basic balance, thereby elimination or minimizing helix current are to the influence of ship's navigation and rudder gear.
The axis of secondary screw propeller and the dead in line of main screw.
Description of drawings:
Below in conjunction with accompanying drawing and the specific embodiment to the twin screw propelling unit peculiar to vessel further explain of the utility model limit:
Fig. 1 is the structural principle scheme drawing of the utility model twin screw propelling unit peculiar to vessel embodiment.
The specific embodiment:
Among Fig. 1, screw propeller seat 2 is fixedly connected on the hull, and main screw 1 is installed in the front end of screw propeller seat 2; Secondary screw propeller 3 is installed in the rear end of screw propeller seat 2; The back of secondary screw propeller 3 is rudder blades 4, and rudder blade 4 is installed in (rudder stock does not draw among the figure) on the hull, the dead in line of the axis of secondary screw propeller 3 and main screw 1 through rudder stock is rotating; The diameter of secondary screw propeller 3 is less than the diameter of main screw 1, and the rotation direction of the blade on the secondary screw propeller 3 is opposite with the rotation direction of the blade on the main screw 1.Main screw 1 and secondary screw propeller 3 are by separately actuator drives (driving device does not draw among the figure); The direction of rotation of the rotation direction of main screw 1 and secondary screw propeller 3 during work; After main screw 1 rotated, the current that promoted by main screw 1 are retrude twist, and this strand current are during through secondary screw propeller 3; Move after being promoted also by secondary screw propeller 3 with opposite hand of spiral again; Both increased and promoted the power that boats and ships advance, and made the hand of spiral of part current opposite again, thereby made the shape direction of revolving of the current that move after whole obtain correcting; Current after the rectification make the hydraulic pressure of rudder blade 4 both sides of secondary screw propeller 3 back in a basic balance, thereby eliminate or reduce the influence of helix current to ship's navigation and rudder gear.
Claims (2)
1. twin screw propelling unit peculiar to vessel; Comprise screw propeller seat (2) and through the rotating main screw (1) that is installed on the said screw propeller seat (2) of driving device; It is characterized in that: a secondary screw propeller (3) also is installed on described screw propeller seat (2); This pair screw propeller (3) is positioned at the back of said main screw (1); And the parallel axes of the axis of said secondary screw propeller (3) and said main screw (1) and near, the rotation direction of the blade of the rotation direction of the blade of said secondary screw propeller (3) and said main screw (1) is opposite, the diameter of said secondary screw propeller (3) is less than the diameter of said main screw (1).
2. twin screw propelling unit peculiar to vessel according to claim 1 is characterized in that: the dead in line of the axis of said secondary screw propeller (3) and said main screw (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202889430U CN202226041U (en) | 2011-08-08 | 2011-08-08 | Twin-screw propulsion device for ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202889430U CN202226041U (en) | 2011-08-08 | 2011-08-08 | Twin-screw propulsion device for ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202226041U true CN202226041U (en) | 2012-05-23 |
Family
ID=46076643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202889430U Expired - Fee Related CN202226041U (en) | 2011-08-08 | 2011-08-08 | Twin-screw propulsion device for ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202226041U (en) |
-
2011
- 2011-08-08 CN CN2011202889430U patent/CN202226041U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20130808 |