CN109318094B - Propeller and sharkskin surface abrasive belt grinding method thereof - Google Patents
Propeller and sharkskin surface abrasive belt grinding method thereof Download PDFInfo
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- CN109318094B CN109318094B CN201811377328.XA CN201811377328A CN109318094B CN 109318094 B CN109318094 B CN 109318094B CN 201811377328 A CN201811377328 A CN 201811377328A CN 109318094 B CN109318094 B CN 109318094B
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- propeller
- abrasive belt
- contact wheel
- sharkskin
- grinding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/006—Machines or devices using grinding or polishing belts; Accessories therefor for special purposes, e.g. for television tubes, car bumpers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/18—Accessories
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The invention discloses abrasive belt grinding equipment for the surface of propeller sharkskin, which is used for solving the problem of abrasive belt grinding equipment for the surface of propeller sharkskin. The technical scheme is as follows: the abrasive belt is composed of a contact wheel, a contact wheel bracket, an abrasive belt, a cylinder rod sleeve and a cylinder. The using method comprises the following steps: firstly, a smooth surface of the propeller is ground by a sand belt grinding head, then a required infinitesimal surface is ground on the formed surface by carrying out instantaneous microfeeding control when the grinding head and the propeller surface move relatively, and then a track is planned along the propeller surface to reach the state of the shark-skin-like surface. The invention relates to equipment for grinding and processing a propeller sharkskin surface abrasive belt, which realizes processing of a propeller surface type sharkskin structure, creates a method for processing the propeller sharkskin surface, and is beneficial to actual production and popularization.
Description
Technical Field
The invention relates to the technical field of propeller processing, in particular to a propeller and sharkskin surface abrasive belt grinding equipment thereof.
Background
Due to the non-uniformity of the flow field of the propeller in the operation process, the phenomenon of abnormal cavitation on the surface of the propeller page is difficult to avoid, so that severe vibration of a ship is caused, cavitation erosion of blades is caused, and harmful results such as noise are caused, and according to statistics, cavitation noise occupies 70% -80% of the operation noise of a military propeller. Meanwhile, the profile surface of the propeller is contacted with seawater in the high-speed operation process to generate larger friction, so that the resistance of the propeller in the operation process is increased, and the operation speed of the propeller is greatly reduced; the surface shape of the propeller is an important factor influencing the drag reduction characteristics of the propeller.
Up to now, the following methods are basically adopted for processing the large propeller: 1. a gantry type multi-shaft linkage milling machine which is larger than the propeller is used, the propeller is horizontally placed on a workbench in the middle of the machine tool, and the milling head mills the workpiece from the upper side. This is the main processing mode to the screw nowadays, but the design, manufacturing and the assembly of lathe must consume a large amount of manpower, material resources and time, because the span of crossbeam is too big, must guarantee the rigidity, stability and the machining precision of lathe very difficult. 2. And (3) decomposing each blade of the propeller by adopting a decomposition method, independently processing, and finally assembling for use. However, the propeller manufactured in this way is greatly limited in its structure and is inferior in rigidity, reliability and blade symmetry to the integral propeller. 3. And grinding and forming the propeller by a manual grinding method. The method needs more hands and long time, and the precision is difficult to ensure.
Disclosure of Invention
In order to overcome the defects of the traditional method and equipment and solve the problem of pioneering processing of the surface of the propeller sharkskin, the invention provides equipment for grinding the surface of the propeller sharkskin by using a sand belt.
In order to achieve the purpose, the invention provides the following technical scheme:
a propeller sharkskin surface abrasive belt grinding equipment comprises: the device comprises a contact wheel, a contact wheel bracket, an abrasive belt and a driving device;
the abrasive belt is in rotatable fit with the contact wheel, the contact wheel support is rotatably mounted on the contact wheel support, and the driving device can drive the contact wheel support to drive the contact wheel and the contact wheel support to feed.
Preferably, the driving device is a linear driving device.
Preferably, the driving device is an air cylinder, and the contact wheel bracket is mounted on an air cylinder rod of the air cylinder; the cylinder can push the contact wheel to perform micro-releasing and retracting movement through instantaneous air suction and air discharge.
Preferably, the cylinder rod further comprises a cylinder rod sleeve arranged on the cylinder rod.
Preferably, the contact wheel is drum-shaped.
According to the technical scheme, the abrasive belt grinding device for the surface of the propeller sharkskin can be used for processing the surface of the propeller sharkskin by utilizing abrasive belt grinding, and provides a new idea for the existing special processing technology for the surface of the propeller.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a method for grinding a shark skin surface of a propeller according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a belt sanding processing device for a shark skin surface of a propeller according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a contact wheel in the belt sanding processing equipment for the shark skin surface of the propeller provided by the embodiment of the invention.
Wherein, 1 is the contact wheel, 2 is the contact wheel support, 3 is the abrasive band, 4 is the cylinder rod cover, 5 is the cylinder constitution.
Detailed Description
The invention discloses abrasive belt grinding equipment for the surface of propeller sharkskin, which is used for solving the problem of abrasive belt grinding equipment for the surface of propeller sharkskin. The technical scheme is as follows: the abrasive belt is composed of a contact wheel, a contact wheel bracket, an abrasive belt, a cylinder rod sleeve and a cylinder. The scheme also provides an abrasive belt processing method of the sharkskin surface, which comprises the steps of firstly grinding the smooth surface of the propeller by using an abrasive belt grinding head, then grinding the required infinitesimal surface by carrying out instantaneous microfeeding control on the formed surface when the grinding head and the propeller surface move relatively, and then planning a track along the propeller surface to achieve the state of the sharkskin-like surface. The invention relates to equipment for grinding and processing a propeller sharkskin surface abrasive belt, which realizes processing of a propeller surface type sharkskin structure, creates a method for processing the propeller sharkskin surface, and is beneficial to actual production and popularization.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Aiming at the problem that the running speed of the propeller is reduced by resistance, scientists deeply research the non-smooth resistance-reducing surface and the resistance-reducing mechanism of the surface of the marine animal body for a long time, find that the sharkskin surface is a non-smooth surface which has a special structure and is similar to a stripe shape, and think that the geometric shape of the sharkskin surface is the largest factor influencing the resistance-reducing characteristic of the sharkskin surface. The scheme utilizes abrasive belt grinding to process the shark-like skin surface on the surface of the propeller, and provides a new idea for the existing special processing technology of the propeller surface.
The embodiment of the invention provides abrasive belt grinding equipment for the surface of propeller sharkskin, which comprises: the structure of the contact wheel 1, the contact wheel bracket 2, the abrasive belt 3 and the driving device can be seen in figure 2;
the abrasive belt 3 is in rotatable fit with the contact wheel 1, the contact wheel support 2 is rotatably mounted on the contact wheel support 2, and the driving device can drive the contact wheel support 2 to drive the contact wheel 1 and the contact wheel support 2 to feed.
According to the technical scheme, the abrasive belt grinding processing equipment for the surface of the propeller sharkskin provided by the embodiment of the invention processes the surface of the propeller sharkskin by abrasive belt grinding, and provides a new idea for the existing special processing technology for the surface of the propeller;
the scheme avoids consuming a large amount of manpower, material resources and time, can improve the processing precision, and can process on the integral propeller so as to ensure the rigidity, reliability and symmetry degree of the blades.
Preferably, the drive means is a linear drive means which can be used to drive the sanding belt 3 in and out in a direction perpendicular to the plane of the paddle for effective sanding, and the structure of which can be seen in fig. 1.
Specifically, the driving device is a cylinder 5, and the contact wheel bracket 2 is arranged on a cylinder rod of the cylinder 5 to provide stable and powerful feeding grinding, so that the machining precision is improved; the cylinder 5 can be through the instantaneous breathing in and the gassing promotes contact wheel 1 and carry out small receipts motion of putting, can satisfy the abrasive machining demand of the small unit of this scheme class sharkskin, and is high-efficient accurate.
The abrasive belt grinding equipment for the surface of the shark skin of the propeller provided by the embodiment of the invention further comprises a cylinder rod sleeve 4 arranged on the cylinder rod, so that a protection effect is achieved.
The embodiment of the invention also provides a grinding processing method of the abrasive belt on the surface of the sharkskin of the propeller, which comprises the following steps:
b1, grinding a tiny unit on the blade surface of the propeller by using the rotating abrasive belt 3;
b2, grinding a plurality of micro units on the paddle surface at intervals according to the method of step B1, wherein the plurality of micro units form the shark skin surface, the arrangement direction and the rule of the micro units are determined according to the fluid mechanics analysis result (the flow direction of the fluid on the shark skin surface), and the micro units can be locally in the same direction and uniformly distributed in the specific embodiment shown in the figure 1, but the invention is not limited to the above.
According to the technical scheme, the abrasive belt grinding processing method for the surface of the propeller sharkskin provided by the embodiment of the invention realizes the processing of the propeller-surface sharkskin structure, initiates the existing propeller sharkskin surface processing method, and is beneficial to actual production and popularization;
the scheme avoids consuming a large amount of manpower, material resources and time, can improve the processing precision, and can process on the integral propeller so as to ensure the rigidity, reliability and symmetry degree of the blades.
Preferably, step B1 is: the rotating abrasive belt 3 is adopted to move along the paddle surface, and the abrasive belt 3 is fed first and then retreated to grind a tiny unit on the paddle surface. The structure of the abrasive belt is shown in figure 1, the rotation track of the abrasive belt 3 and the moving track of the abrasive belt along the paddle surface are positioned in the same plane, the processed micro units are curved surface pits which are shallow from front to back and deep in the middle, and longitudinal (vertical to the paddle surface) tangent planes are formed on two sides of each micro unit; in the grinding process of the micro unit, the movement distance of the abrasive belt 3 along the paddle surface is L, and the feeding distance is ds. Through the method, a more desirable micro unit structure can be ground on the surface of the propeller, so that the drag reduction effect of the shark skin-imitated surface is improved.
In this embodiment, step B2 is: when the abrasive belt 3 moves along the paddle surface, the abrasive belt 3 is made to grind the paddle surface for multiple times according to time intervals, so that multiple tiny units are ground on the paddle surface at intervals, and the machining precision is improved. Specifically, the abrasive belt 3 can move along the paddle surface at a constant speed, and the paddle surface is ground for multiple times according to a preset time interval, wherein the preset interval is determined according to a specific fluid mechanics analysis result. Of course, the distance may be further determined according to the moving distance, and the description is omitted here. The movement of the abrasive belt 3 along the paddle surface can be realized by a mechanical structure, and the movement track of the abrasive belt is determined by the arrangement direction and the rule of the micro units according to the hydrodynamics analysis result.
In order to further optimize the above technical solution, in step B1, abrasive belt 3 is fed and retracted in the direction perpendicular to the paddle surface to perform the effective grinding operation, and the structure thereof can be seen in fig. 1.
Preferably, the abrasive belt 3 is ground by the contact wheel 1 pushed by the cylinder 5 to provide stable and powerful feed grinding to improve the machining accuracy, and the structure thereof can be seen in fig. 1 and 2. The invention provides a propeller sharkskin surface abrasive belt grinding processing device, which comprises: contact wheel 1, contact wheel support 2, abrasive band 3, cylinder rod cover 4 and cylinder 5.
Specifically, the contact wheel 1 is promoted through instantaneous breathing in and gassing of cylinder 5 to make abrasive band 3 carry out the small motion of receiving and releasing, can satisfy the abrasive machining demand of the small unit of this scheme class sharkskin, and is high-efficient accurate.
The difference from the traditional cylindrical contact wheel is that the contact wheel 1 of the abrasive belt 3 in the method is drum-shaped, the structure of which can be shown in fig. 3, in order to utilize the tiny convex part to drive the abrasive belt 3 to grind the shark skin-like tiny units on the surface of the propeller under the instantaneous micro-feeding state, thereby achieving better resistance reduction effect.
The abrasive belt grinding method for the shark skin surface of the propeller provided by the embodiment of the invention further comprises the following steps before the steps B1 and B2: and step A, roughly grinding the forming surface of the propeller by using a machine tool.
The present solution is further described below with reference to specific embodiments:
a grinding processing method and equipment of a propeller sharkskin surface abrasive belt adopts a grinding head instantaneous micro-feeding control technology, and the specific method comprises the following steps:
a. firstly, roughly grinding the forming surface of the propeller by using a machine tool;
b. when the grinding head moves along the paddle surface, as shown in figure 1, the air is instantaneously sucked by the air cylinder 5 on the upper part of the grinding head contact wheel 1, the air is discharged to push the contact wheel to perform micro release and retraction movement along the direction vertical to the paddle surface, the rotating abrasive belt 3 grinds micro units of the shark-skin-like surface on the paddle surface, and the air cylinder is controlled at time intervals according to specific requirements to grind a complete shark-skin-like surface.
As shown in the attached figure 2, the abrasive belt grinding processing equipment for the surface of the propeller sharkskin consists of a contact wheel 1, a contact wheel bracket 2, an abrasive belt 3, a cylinder rod sleeve 4 and a cylinder 5; in order to grind the micro-element (i.e. the micro-unit) structure of the shark skin surface, a drum-shaped contact wheel is selected, and when the surface of the propeller shark skin needs to be ground, the instantaneous micro-feeding control is achieved by utilizing the instantaneous air collection and release of an air cylinder.
As shown in fig. 3, the contact wheel 1 of this device differs from a conventional cylindrical contact wheel in that its outer shape is drum-shaped, which is provided for the purpose of using its small protrusions to bring the abrasive belt 3 to grind a shark-skin-like small unit of the propeller surface in an instantaneous micro-feeding state.
Embodiments of the present invention also provide a propeller having a blade surface manufactured as described above, the blade surface comprising a sharkskin surface comprised of a plurality of micro-cells. The scheme simplifies the small three-dimensional scale shield groove structure on the surface of the imitation sharkskin into a small pit (a ground part) and a small bulge (a part between the pits, which is not ground), can effectively reduce the resistance of the propeller in the running process, and improves the running speed of the propeller.
In summary, the embodiment of the invention discloses a method and equipment for abrasive belt grinding of a propeller sharkskin surface, which are used for solving the problems of the method and the equipment for abrasive belt grinding of the propeller sharkskin surface. The technical scheme is as follows: the abrasive belt processing method for shark skin surface includes grinding smooth surface of propeller with abrasive belt grinding head, pressing down the contact wheel driven with abrasive belt controlled by cylinder to feed on the surface of propeller to grind required surface of micro element, and grinding micro elements arranged regularly along the surface of propeller to reach the state of shark skin surface. The invention discloses a propeller sharkskin surface abrasive belt grinding processing device which comprises a contact wheel, a contact wheel support, an abrasive belt, a cylinder rod sleeve and a cylinder.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A propeller sharkskin surface abrasive belt grinding method is characterized in that propeller sharkskin surface abrasive belt grinding equipment is adopted, and the equipment comprises: the device comprises a contact wheel (1), a contact wheel bracket (2), an abrasive belt (3) and a driving device;
the abrasive belt (3) is in rotatable fit with the contact wheel (1), the contact wheel bracket (2) is rotatably mounted on the contact wheel bracket (2), and the driving device can drive the contact wheel bracket (2) to drive the contact wheel (1) and the contact wheel bracket (2) to feed first and then return to a paddle surface to grind a micro unit; the driving device is a linear driving device and is used for driving the abrasive belt (3) to feed and retract along the direction vertical to the paddle surface; the contact wheel (1) is drum-shaped;
the method comprises the following steps:
b1, moving a rotating abrasive belt (3) on the paddle surface of a propeller, feeding the abrasive belt (3) along the direction vertical to the paddle surface, and then returning to grind a tiny unit on the paddle surface, wherein the rotating track of the abrasive belt (3) and the moving track of the abrasive belt along the paddle surface are positioned in the same plane, the tiny unit is a curved pit which is shallow in the front and back and deep in the middle, and the two sides of the tiny unit form tangent planes vertical to the paddle surface;
b2, grinding the paddle surface for multiple times according to the time interval by the abrasive belt (3) according to the step B1, so that a plurality of tiny units are ground on the paddle surface at intervals, and the tiny units form a shark skin surface.
2. A propeller sharkskin surface belt grinding process according to claim 1, characterized in that said abrasive belt (3) is grinding said paddle surface by pushing a contact wheel (1) with a cylinder (5).
3. A propeller sharkskin surface belt grinding process according to claim 2, characterized in that said contact wheel (1) is pushed by instantaneous suction and discharge of said cylinder (5) to make said belt (3) perform a slight retraction movement.
4. The method for abrasive belt grinding of a shark skin surface of a propeller according to claim 1, further comprising, before the steps B1 and B2:
and step A, roughly grinding the forming surface of the propeller by using a machine tool.
5. A propeller sharkskin surface abrasive belt grinding process according to claim 1, wherein said driving means is a cylinder (5), said contact wheel holder (2) being mounted to a cylinder rod of said cylinder (5); the cylinder (5) can push the contact wheel (1) to perform micro releasing and retracting movement through instantaneous air suction and air discharge.
6. A propeller sharkskin surface belt grinding process according to claim 2, characterized in that said equipment further comprises a cylinder rod sleeve (4) arranged to the cylinder rod.
7. A propeller having a blade surface manufactured by the method of any one of claims 1 to 6, said blade surface comprising a sharkskin surface consisting of a plurality of said micro-cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811377328.XA CN109318094B (en) | 2018-11-19 | 2018-11-19 | Propeller and sharkskin surface abrasive belt grinding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811377328.XA CN109318094B (en) | 2018-11-19 | 2018-11-19 | Propeller and sharkskin surface abrasive belt grinding method thereof |
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| CN109318094A CN109318094A (en) | 2019-02-12 |
| CN109318094B true CN109318094B (en) | 2021-02-09 |
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| US3896592A (en) * | 1974-05-06 | 1975-07-29 | Aladdin Mfg | Apparatus for sharpening blades |
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2018
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| CN109318094A (en) | 2019-02-12 |
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