CN115123507B - Double-engine double-propeller ship and propeller installation method thereof - Google Patents
Double-engine double-propeller ship and propeller installation method thereof Download PDFInfo
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- CN115123507B CN115123507B CN202210994381.4A CN202210994381A CN115123507B CN 115123507 B CN115123507 B CN 115123507B CN 202210994381 A CN202210994381 A CN 202210994381A CN 115123507 B CN115123507 B CN 115123507B
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- 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
- B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/36—Shaft tubes
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- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application relates to the technical field of ships, in particular to a double-engine double-propeller ship and a propeller installation method thereof. When the positions of pistons in cylinders with the same cylinder numbers in the first propeller engine and the second propeller engine are the same, in a connecting line between the middle point of the root of a blade on the first propeller and the center point of the first propeller, the minimum angle between the middle point of the root of the blade on the second propeller and the center point of the second propeller is A, in a connecting line between the middle point of the root of the blade on the second propeller and the center point of the second propeller, the minimum angle between the middle point of the root of the blade on the second propeller and the center point of the second propeller and the vertical line is B, wherein A is smaller than B, when unbalanced moments in the two engines are overlapped, the maximum exciting force of the first propeller and the maximum exciting force of the second propeller are not overlapped, and when the maximum exciting force of the first propeller and the maximum exciting force of the second propeller are overlapped, the unbalanced moments of the first propeller engine and the second propeller are not overlapped, so that the vibration amplitude of the ship body is reduced, and the comfort of the ship body is improved.
Description
Technical Field
The application relates to the technical field of ships, in particular to a double-engine double-propeller ship and a propeller installation method thereof.
Background
Exciting force of the propeller is divided into bearing force and surface force. The bearing forces are due to the varying lift forces generated by the propeller blades in uneven flow, mainly transmitted to the hull structure via the propeller shaft. The surface force is the pulsating water pressure transmitted and acting on the stern outer plate due to the pressure change of the nearby flow field caused by the position change of the propeller blades relative to the transverse ship body when the propeller blades rotate in the flow field.
In the running process of the existing double-engine double-propeller ship, the two engines of the double engine are subjected to vibration aggravation after being overlapped by unbalanced moment generated in the running process of the piston, exciting forces generated in the running process of the double propeller are also easy to be overlapped, the vibration of the ship body is aggravated, and after the unbalanced moment after being overlapped by the two engines and the exciting forces after being overlapped by the two propellers are overlapped again, the vibration of the ship body is aggravated, so that the comfort of the ship is reduced.
Disclosure of Invention
The embodiment of the application aims to provide a double-engine double-paddle ship, which is used for improving the comfort of the double-engine double-paddle ship;
another object of the embodiments of the present application is to provide a method for installing a propeller of the above-mentioned twin-engine double-propeller ship.
In a first aspect, a dual-engine, dual-propeller ship is provided, comprising a ship body and a ship body power system, wherein the ship body power system comprises a first propeller, a second propeller, a first propeller engine driving the first propeller and a second propeller engine driving the second propeller, and the first propeller engine and the second propeller engine are provided with a cylinder and a piston in the cylinder; the rotation direction of the first propeller is opposite to that of the second propeller; the number of blades on the first propeller is the same as the number of blades on the second propeller, and the method is characterized in that the number of cylinders in the first propeller engine is the same as the number of cylinders in the second propeller engine, and when pistons in two cylinders with the same cylinder number of the first propeller engine and the second propeller engine run to the same position: the minimum included angle between the midpoint of each blade root on the first propeller and the central point of the first propeller and the vertical line passing through the central point of the first propeller is A, and the minimum included angle between the midpoint of each blade root on the second propeller and the central point of the second propeller and the vertical line passing through the central point of the second propeller is B, wherein A is smaller than B.
In one possible embodiment, A has a value in the range of 0℃to 10 ℃.
In a possible embodiment, the blades of the first propeller and the blades of the second propeller are each provided with 4 blades, and B is 45 degrees.
In a possible embodiment, 5 blades of the first propeller and 5 blades of the second propeller are each provided, and B is 36 degrees.
In a possible embodiment, 6 blades of the first propeller and 6 blades of the second propeller are each provided, and B is 30 degrees.
In a possible embodiment, the cylinders of the first propeller engine are identical in structure to the cylinders of the second propeller engine.
In a possible embodiment, the first propeller is identical in structure to the second propeller.
In a possible embodiment, a first propeller engine is connected to the intermediate shaft and the tail shaft, the first propeller being mounted on the tail shaft, the first propeller engine driving the first propeller to rotate via the intermediate shaft and the tail shaft.
In a possible embodiment, a second propeller engine is connected to the intermediate shaft and the tail shaft, the second propeller being mounted on the tail shaft, the second propeller engine driving the second propeller to rotate via the intermediate shaft and the tail shaft.
According to a second aspect of the present application, there is also provided a method of installing a propeller of a twin-engine, double-propeller vessel as described in the first aspect, comprising the steps of:
the pistons in the two cylinders with the same cylinder numbers of the first propeller engine and the second propeller engine are operated to the same position, the pistons in the first propeller engine and the pistons in the second propeller engine are fixed, and the propellers are installed at the beginning, so that the first propeller and the second propeller meet the following conditions:
the minimum included angle between the midpoint of each blade root on the first propeller and the central point of the first propeller and the vertical line passing through the central point of the first propeller is A, the minimum included angle between the midpoint of each blade root on the second propeller and the central point of the second propeller and the vertical line passing through the central point of the second propeller is B, wherein A is smaller than B; the first propeller and the second propeller are then fixed.
The beneficial effects of this application: in the double-engine double-propeller ship, when pistons in two cylinders with the same cylinder numbers of a first propeller engine and a second propeller engine run to the same position, in a connecting line of the middle point of the root of a blade on the first propeller and the center point of the first propeller, the minimum vertical line clamping angle between the middle point of the root of the blade on the second propeller and the center point of the second propeller is A, in a connecting line of the middle point of the root of the blade on the second propeller and the center point of the second propeller, the minimum vertical line included angle between the middle point of the root of the blade and the center point of the second propeller is B, wherein A is smaller than B, namely the first propeller and the second propeller are installed out of phase, so that when unbalanced moment in the two engines is overlapped, the maximum exciting force of the first propeller and the second propeller is not overlapped, and when the maximum exciting force of the first propeller and the second propeller is overlapped, the unbalanced moment of the first propeller engine and the second propeller is not overlapped, the vibration amplitude of the ship is reduced, the ship is effectively reduced, and the comfort of the ship is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the power system in a dual-engine, dual-paddle ship embodiment according to the present application;
FIG. 2 is a state diagram of a twin-engine, double-propeller ship embodiment according to the present application after the first propeller and the second propeller are installed;
FIG. 3 is a state diagram of a twin-screw vessel according to another embodiment of the present application after installation of a first propeller and a second propeller;
FIG. 4 is a state diagram of a third embodiment of a twin-engine, double-propeller ship according to the present application, in which a first propeller and a second propeller are installed;
in the figure: 1. a first propeller; 2. a second propeller; 3. a first propeller engine; 4. a second propeller engine; 5. a first intermediate shaft; 6. a first tail shaft; 7. a second intermediate shaft; 8. a second tail shaft; 9. a first propeller center point; 10. a blade; 11. a second propeller center point.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description of the present application and for simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
According to a first aspect of the present application, there is provided a double-machine double-paddle ship, and fig. 1 is a schematic structural view of an embodiment of the double-machine double-paddle ship according to the present application.
The double-engine double-propeller ship comprises a ship body and a ship body power system, wherein the ship body power system comprises a propeller and a propeller engine for driving the propeller, and the propeller engine is provided with a cylinder and a piston in the cylinder.
The screw sets up two and with screw engine one-to-one, and two screw settings are first screw 1 and second screw 2 respectively, and the blade quantity on the first screw 1 is the same with the blade quantity on the second screw 2, and the structure of first screw 1 is the same with the structure of second screw 2. The two propeller engines are a first propeller engine 3 and a second propeller engine 4, respectively. The structure of the first propeller engine 3 is the same as that of the second propeller engine 4, the type of the cylinder in the first propeller engine 3 is the same as that of the cylinder in the second propeller engine 4, and the cylinder of the first propeller engine 3 is the same as that of the second propeller engine 4.
The first propeller engine 3 is connected with the first intermediate shaft 5 and the first tail shaft 6, the first propeller 1 is positioned on the first tail shaft 6, the second propeller engine 4 is connected with the second intermediate shaft 7 and the second tail shaft 8, and the second propeller 2 is positioned on the second tail shaft 8.
When the power system is running, the rotation direction of the first propeller 1 and the rotation direction of the second propeller 2 are opposite. When the pistons in the two cylinders with the same cylinder numbers in the cylinders of the first propeller engine 3 and the second propeller engine 4 run to the same position, the connection line between the middle point of the root part of each blade 10 on the first propeller 1 and the first propeller central point 9 is the smallest A in the vertical line clamping angle passing through the first propeller central point 9, the connection line between the middle point of the root part of each blade 10 on the second propeller 2 and the second propeller central point 11 is the smallest B in the vertical line clamping angle passing through the second propeller central point 11, and the A is smaller than the B.
The pistons running to the same position means that the positions of the pistons in the cylinders are the same in two cylinders of the same cylinder number. Two cylinders of the same cylinder number refer to two cylinders that are identical in operating state in the engine.
In this embodiment, A has a value in the range of 0 to 10, and preferably A has a value of 0. In this embodiment, as shown in fig. 2, 4 blades 10 of the first propeller 1 and 4 blades 10 of the second propeller 2 are provided, and B is 45 degrees.
In one embodiment, as shown in fig. 3, 5 blades 10 of the first propeller 1 and 5 blades 10 of the second propeller 2 are each provided, and B is 36 degrees.
In one embodiment, as shown in fig. 4, 6 blades 10 of the first propeller 1 and 6 blades 10 of the second propeller 2 are each provided, and B is 30 degrees.
The propeller installation method of the double-engine double-propeller ship comprises the following steps:
the pistons in the two cylinders with the same cylinder numbers of the first propeller engine 3 and the second propeller engine 4 are operated to the same position, the pistons in the first propeller engine 3 and the pistons in the second propeller engine 4 are fixed, and the propellers are started to be installed, so that the first propeller 1 and the second propeller 2 meet the following conditions:
the minimum of the vertical line clamping angle between the midpoint of the root of the blade 10 on the first propeller 1 and the first propeller central point 9 and the vertical line clamping angle passing through the first propeller central point 9 is A, and the minimum of the vertical line clamping angle between the midpoint of the root of the blade 10 on the second propeller 2 and the second propeller central point 11 and the vertical line clamping angle passing through the second propeller central point 11 is B, wherein A is smaller than B; the first propeller 1 and the second propeller 2 are then fixed.
In a second aspect, a method for installing a propeller of a double-engine double-propeller ship according to the first aspect is provided, and steps of the propeller installation method are the same as those described in the specific embodiment of the first aspect, and are not repeated.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (8)
1. The double-engine double-propeller ship comprises a ship body and a ship body power system, wherein the ship body power system comprises a first propeller, a second propeller, a first propeller engine for driving the first propeller and a second propeller engine for driving the second propeller, and the first propeller engine and the second propeller engine are provided with a cylinder and a piston in the cylinder; the rotation direction of the first propeller is opposite to that of the second propeller; the number of blades on the first propeller is the same as the number of blades on the second propeller, and the method is characterized in that the number of cylinders in the first propeller engine is the same as the number of cylinders in the second propeller engine, and when pistons in two cylinders with the same cylinder number of the first propeller engine and the second propeller engine run to the same position: the minimum included angle between the midpoint of each blade root on the first propeller and the central point of the first propeller and the vertical line passing through the central point of the first propeller is A, the minimum included angle between the midpoint of each blade root on the second propeller and the central point of the second propeller and the vertical line passing through the central point of the second propeller is B, wherein A is smaller than B; the cylinder structure of the first propeller engine is the same as that of the second propeller engine, and the structure of the first propeller is the same as that of the second propeller.
2. The twin-engine, double-paddle ship of claim 1 wherein a has a value in the range of 0 ° -10 °.
3. The twin-screw ship according to claim 2, wherein 4 blades of the first propeller and 45 degrees of blades of the second propeller are provided.
4. The twin-screw vessel defined in claim 2, wherein 5 blades of the first propeller and 5 blades of the second propeller are each provided, and B is 36 degrees.
5. The twin-screw vessel defined in claim 2, wherein the blades of the first propeller and the blades of the second propeller are each 6, and B is 30 degrees.
6. The twin-screw ship according to any one of claims 1-5, wherein a first propeller engine is connected to the intermediate shaft and the tail shaft, on which the first propeller is mounted, and wherein the first propeller engine drives the first propeller to rotate via the intermediate shaft and the tail shaft.
7. The twin-screw ship according to any one of claims 1-5, in which a second propeller engine is connected to the intermediate shaft and the tail shaft, on which the second propeller is mounted, the second propeller engine driving the second propeller in rotation via the intermediate shaft and the tail shaft.
8. A method of installing a propeller of a double-machine double-propeller ship as claimed in claim 1, comprising the steps of:
the pistons in the two cylinders with the same cylinder numbers of the first propeller engine and the second propeller engine are enabled to run to the same position, the pistons in the first propeller engine and the pistons in the second propeller engine are fixed, the propellers are started to be installed, and the first propeller and the second propeller meet the following conditions:
the minimum included angle between the midpoint of each blade root on the first propeller and the central point of the first propeller and the vertical line passing through the central point of the first propeller is A, the minimum included angle between the midpoint of each blade root on the second propeller and the central point of the second propeller and the vertical line passing through the central point of the second propeller is B, wherein A is smaller than B; the first propeller and the second propeller are then fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210994381.4A CN115123507B (en) | 2022-08-18 | 2022-08-18 | Double-engine double-propeller ship and propeller installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210994381.4A CN115123507B (en) | 2022-08-18 | 2022-08-18 | Double-engine double-propeller ship and propeller installation method thereof |
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| Publication Number | Publication Date |
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| CN115123507A CN115123507A (en) | 2022-09-30 |
| CN115123507B true CN115123507B (en) | 2023-07-14 |
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| CN202210994381.4A Active CN115123507B (en) | 2022-08-18 | 2022-08-18 | Double-engine double-propeller ship and propeller installation method thereof |
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8393923B2 (en) * | 2011-05-26 | 2013-03-12 | Mohammad A. Alzemi | Marine propulsion assembly |
| JP2019098900A (en) * | 2017-12-01 | 2019-06-24 | 川崎重工業株式会社 | Adjacently arranged twin-screw vessel |
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