CN112124541A - Marine split type fixed pitch propeller - Google Patents
Marine split type fixed pitch propeller Download PDFInfo
- Publication number
- CN112124541A CN112124541A CN202011092453.3A CN202011092453A CN112124541A CN 112124541 A CN112124541 A CN 112124541A CN 202011092453 A CN202011092453 A CN 202011092453A CN 112124541 A CN112124541 A CN 112124541A
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- CN
- China
- Prior art keywords
- propeller
- hub
- blade
- paddle
- fixing bolt
- 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
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Classifications
-
- 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
- B63H1/20—Hubs; Blade connections
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- 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
- B63H1/26—Blades
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a split type fixed-pitch propeller for a ship, which comprises a propeller hub, blades and fixing bolts, wherein the blades and the propeller hub are in a split type structure, and each blade is fixed on the propeller hub through the fixing bolts. The blade and the hub are connected through the fixing bolt, the hub is provided with the first pin hole, the positioning pin is inserted into the first pin hole during installation, and then the second pin hole at the bottom of the blade is aligned with the positioning pin to complete positioning. The propeller hub is provided with steps, so that axial positioning can be provided for the propeller blades during installation, and the thrust or the pull force caused by rotation of the propeller can be borne in the form of a retaining shoulder during operation of the propeller.
Description
Technical Field
The invention relates to the technical field of ship propellers, in particular to a split type fixed-pitch propeller for a ship.
Background
The propeller is an important component of a ship propeller and provides power for a ship through rotation. The existing ship propeller is usually formed by integral casting, the diameter of the propeller of a high-power propeller can reach 5 meters or even higher, an ultra-large machine tool is required to be used for processing the propeller, and the processing cost is very high. Meanwhile, when boats and ships navigate, the condition that the screw paddle damaged often appears, and during the maintenance of boats and ships entering the dock, whole screw must be changed in traditional screw paddle damage, changes whole screw and need pull down the screw from the propeller shaft, because interference fit between the two, dismantles the difficulty and need take time long, and cost of maintenance is high.
Disclosure of Invention
The invention aims to provide a split type fixed-pitch propeller for a ship, aiming at the problems of time and labor consumption and high cost in the disassembly and maintenance of the traditional propeller. The blade and the hub are connected through the fixing bolt, the hub is provided with the first pin hole, the positioning pin is inserted into the first pin hole during installation, and then the second pin hole at the bottom of the blade is aligned with the positioning pin to complete positioning. The propeller hub is provided with steps, so that axial positioning can be provided for the propeller blades during installation, and the thrust or the pull force caused by rotation of the propeller can be borne in the form of a retaining shoulder during operation of the propeller.
The technical scheme of the invention is as follows:
the invention provides a split type fixed-pitch propeller for a ship, which comprises a propeller hub, blades and fixing bolts, wherein the blades and the propeller hub are in a split type structure, and each blade is fixed on the propeller hub through the fixing bolts.
Further, the fixing bolt is provided with a central through hole, and the top of the central through hole is a threaded end.
Further, the threaded end of the fixing bolt can be matched with the plug screw to block the central through hole.
Further, the fixing bolt is made of stainless steel.
Further, a step surface is arranged on the propeller hub, and the left side of the step surface is higher than the right side of the step surface; the bottom of the blade is matched with the step surface of the hub.
Furthermore, a raised circular ring is arranged in the middle of the hub, a first pin hole is formed in the circular ring, a positioning pin is arranged between the hub and the blade, and the bottom of the positioning pin is installed in the first pin hole and fixed through a positioning pin fixing screw; and a second pin hole is formed in the bottom of the paddle and corresponds to the positioning pin, and the top of the positioning pin is installed in the second pin hole for positioning.
Furthermore, the paddle comprises a paddle taper arc surface and blades erected on the surface of the paddle taper arc surface, a plurality of countersunk holes are formed in the paddle taper arc surface, the fixing bolts are inserted into the countersunk holes to fix the paddle, and the head of each fixing bolt is sunk below the paddle taper arc surface.
The invention has the beneficial effects that:
the propeller blade and the propeller hub are connected by the fixing bolt, when a single blade is damaged, only the damaged blade can be replaced, the maintenance cost is reduced, and when the blade is replaced, the propeller hub does not need to be detached from the propeller shaft, so that the maintenance time is reduced.
The step surface is arranged on the propeller hub, so that axial positioning can be provided for the blade during installation, and the thrust or the pulling force caused by rotation of the propeller is borne in a shoulder blocking mode during operation of the propeller.
According to the invention, the blade is fixed on the propeller hub by using the fixing bolt, the fixing bolt is provided with the central through hole, the top of the fixing bolt is provided with the thread, when the bolt is screwed down, the central hole can discharge air at the bottom of the bolt, so that the bolt can be normally screwed down, after the mounting is finished, the central hole of the fixing bolt is plugged by using the plug screw, and the air pressure resistance is prevented by discharging the air at the bottom, so that the product performance is effectively improved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a schematic view of a fixing bolt installation;
FIG. 3 is a schematic view of the locating pin installation;
FIG. 4 is a schematic view of a hub configuration;
FIG. 5 is a schematic top view of a blade configuration;
FIG. 6 is a schematic side view of a blade configuration.
In the figure: 1. a hub; 2. a paddle; 3. fixing the bolt; 4. a plug screw; 5. positioning pins; 6. fixing screws by positioning pins; 7. a blade taper cambered surface; 8. a blade; 9. a countersunk hole; 10. a second pin hole; 1-1, left side of step surface; 1-2, right side of step surface; 1-3, a first pin hole.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein.
As shown in figure 1, the invention provides a split type fixed-pitch propeller for ships, which comprises a hub 1, blades 2 and fixing bolts 3, wherein the blades 2 and the hub 1 are in a split structure, and each blade 2 is fixed on the hub 1 through the fixing bolt 3.
In this embodiment, when a blade 2 is found to be damaged during actual use, the fixing bolt 3 can be removed and a spare blade can be replaced.
Further, as shown in fig. 2, the fixing bolt 3 is provided with a central through hole, and the top of the central through hole is a threaded end; the threaded end of the fixing bolt 3 can be matched with the plug screw 4 to plug the central through hole.
In the present embodiment, bottom air is discharged from the central through hole to prevent air pressure resistance when the fixing bolt 3 is tightened, and the central hole is closed with the plug screw 4 after the fixing bolt 3 is tightened; the fixing bolt 3 is made of stainless steel to reduce corrosion and prolong the service life.
Further, as shown in fig. 3 and 4, a step surface is arranged on the hub 1, and the left side 1-1 of the step surface is higher than the right side 1-2 of the step surface; the bottom of the blade 2 is matched with the step surface of the hub 1; the middle part of the propeller hub 1 is provided with a raised circular ring, the circular ring is provided with first pin holes 1-3, a positioning pin 5 is arranged between the propeller hub 1 and the propeller blade 2, and the bottom of the positioning pin 5 is arranged in the first pin holes 1-3 and is fixed by a positioning pin fixing screw 6; a second pin hole 10 is provided at the bottom of the paddle 2 at a position corresponding to the positioning pin 5, and the top of the positioning pin 5 is fitted into the second pin hole 10 for positioning.
In the embodiment, the hub 1 is provided with the step surface, so that axial positioning can be provided for the blade during installation, and the thrust or the pulling force caused by rotation of the propeller is borne in a shoulder blocking mode during operation of the propeller, the hub 1 is provided with the first pin holes 1-3, the positioning pins 5 are firstly inserted into the first pin holes 1-3 on the hub 1 during installation, the positioning pins 5 are fixed on the hub 1 by using the fixing screws 6, and then the second pin holes 10 at the bottom of the split type blade are inserted into the positioning pins 5, so that the positioning of the blade 2 can be completed, and the positioning is accurate, high in stability and good in reliability.
Further, as shown in fig. 5 and 6, the blade 2 includes a blade taper arc surface 7 and a blade 8 standing on the surface of the blade, the blade taper arc surface 7 is provided with a plurality of counter bores 9, the fixing bolt 3 is inserted into the counter bores 9 to fix the blade 2, and the head of the fixing bolt 3 sinks below the blade taper arc surface 7 to prevent the bolt head from extending to the outside.
The working principle is as follows:
when the split type blade positioning device is installed, the positioning pin 5 is firstly inserted into the first pin hole 1-3 on the hub 1, the positioning pin 5 is fixed on the hub 1 by using the fixing screw 6, and then the second pin hole 10 at the bottom of the split type blade is inserted into the positioning pin 5, so that the positioning of the blade 2 can be completed;
then, the blade 2 is fixed on the hub 1 through the fixing bolt 3, the fixing bolt 3 is provided with a central through hole, the top of the fixing bolt 3 is provided with threads, when the fixing bolt 3 is screwed, air at the bottom of the fixing bolt 3 can be discharged through the central hole, the fixing bolt 3 can be normally screwed, after the mounting is finished, the central hole of the fixing bolt 3 is plugged through the plug screw 4, air pressure resistance is prevented through discharging the air at the bottom, and the product performance is effectively improved.
The hub 1 and the blades 2 of the invention are independently processed and manufactured, and the requirement on the size of a machine tool is greatly reduced. The casting difficulty can be reduced by changing the original integral casting into split casting, and the method can be applied to the production and the manufacture of the stainless steel paddle. In the actual use, the damage of paddle 2 can independently be changed, and need not to pull down propeller hub 1 from the propeller shaft, has shortened maintenance duration, reduces cost of maintenance.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (7)
1. The utility model provides a marine split type fixed pitch screw which characterized in that: the propeller comprises a propeller hub (1), blades (2) and fixing bolts (3), wherein the blades (2) and the propeller hub (1) are of a split structure, and each blade (2) is fixed on the propeller hub (1) through the fixing bolt (3).
2. The marine split fixed pitch propeller of claim 1, wherein: the fixing bolt (3) is provided with a central through hole, and the top of the central through hole is a threaded end.
3. The marine split fixed pitch propeller of claim 2, wherein: the threaded end of the fixing bolt (3) can be matched with the plug screw (4) to block the central through hole.
4. The marine split fixed pitch propeller of claim 1, wherein: the fixing bolt (3) is made of stainless steel.
5. The marine split fixed pitch propeller of claim 1, wherein: a step surface is arranged on the propeller hub (1), and the left side (1-1) of the step surface is higher than the right side (1-2) of the step surface; the bottom of the blade (2) is matched with the step surface of the hub (1).
6. The marine split fixed pitch propeller of claim 5, wherein: the middle part of the propeller hub (1) is provided with a raised circular ring, the circular ring is provided with a first pin hole (1-3), a positioning pin (5) is arranged between the propeller hub (1) and the propeller blade (2), and the bottom of the positioning pin (5) is arranged in the first pin hole (1-3) and is fixed by a positioning pin fixing screw (6); and a second pin hole (10) is formed in the bottom of the paddle (2) and corresponds to the positioning pin (5), and the top of the positioning pin (5) is installed in the second pin hole (10) for positioning.
7. The marine split fixed pitch propeller of claim 1, wherein: the paddle (2) comprises a paddle taper arc surface (7) and blades (8) erected on the surface of the paddle taper arc surface, a plurality of counter bores (9) are formed in the paddle taper arc surface (7), the fixing bolts (3) are inserted into the counter bores (9) to fix the paddle (2), and the heads of the fixing bolts (3) are sunk below the paddle taper arc surface (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011092453.3A CN112124541A (en) | 2020-10-13 | 2020-10-13 | Marine split type fixed pitch propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011092453.3A CN112124541A (en) | 2020-10-13 | 2020-10-13 | Marine split type fixed pitch propeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112124541A true CN112124541A (en) | 2020-12-25 |
Family
ID=73852945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011092453.3A Pending CN112124541A (en) | 2020-10-13 | 2020-10-13 | Marine split type fixed pitch propeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112124541A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113212716A (en) * | 2021-05-12 | 2021-08-06 | 威海光威复合材料股份有限公司 | Detachable propeller |
-
2020
- 2020-10-13 CN CN202011092453.3A patent/CN112124541A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113212716A (en) * | 2021-05-12 | 2021-08-06 | 威海光威复合材料股份有限公司 | Detachable propeller |
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