CN104832352A - Blade of high-power horizontal shaft ocean current energy electric generator and manufacturing method thereof - Google Patents
Blade of high-power horizontal shaft ocean current energy electric generator and manufacturing method thereof Download PDFInfo
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- CN104832352A CN104832352A CN201510226081.1A CN201510226081A CN104832352A CN 104832352 A CN104832352 A CN 104832352A CN 201510226081 A CN201510226081 A CN 201510226081A CN 104832352 A CN104832352 A CN 104832352A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a blade of a high-power horizontal shaft ocean current energy electric generator. The cross section of a metal girder of the blade is shaped like the pictures in the specification; a metal blade tip is welded to the top end of the metal girder; a first net cutter is fixed to the metal blade tip; a metal blade root is welded to the bottom end of the metal girder and is a flange or a screwed hole which is connected with a hub of the ocean current energy electric generator; a first fiber fabric which is smeared or soaked by a first mixed resin wraps and is solidified on the outer side of the metal girder; an outer covering is stuck to the outer side surface of the metal girder; an inner covering is stuck to the inner side surface of the metal girder; gaps between the front side surface and the back side surface of the metal girder and the outer covering as well as the inner covering are filled with foam filling cores; a second net cutter is inserted to the foam filling core at the lower end of the metal girder; a front edge metal wrapping sheet is stuck to one side of the rotating direction of the blade; an anti-pollution coating is sprayed onto the surface of the blade. The blade has the advantages of tide load impact resistance, high strength, high rigidity, gravel collision friction resistance, abrasion resistance, blade tip cavitation corrosion resistance, fishing net winding resistance and marine organism adhesion.
Description
Technical field
The present invention relates to a kind of blade and manufacture method thereof of horizontal axis energy by ocean current generator, this blade is suitable for powerful horizontal axis energy by ocean current generator and uses.
Background technique
Energy by ocean current is a kind of clean reproducible energy, and China's energy by ocean current rich reserves, its developing and utilizingpotentiality is huge.Relative wave, the change of energy by ocean current is steady and regular, has energy density large, regular strong, the advantages such as reserves are large.Energy by ocean current is converted into electric energy by energy by ocean current generator, and for user, blade is as the first order mechanism catching energy of ocean current, it is the vitals of energy by ocean current generator, its structural design, Material selec-tion directly affects energy capture efficiency, and can unit steady in a long-termly run.
The study hotspot in current energy by ocean current field is mainly concentrated in the following areas: the Hydrodynamic design method of (1) ocean current machine blade; (2) design of blade adjustable pitch mechanism; (3) design studies with supporting way is installed; (4) blade cavitation erosion research and suppression; (5) research of unit layout; (6) design of ocean current energy generator new ideas.
For the blade of small-power horizontal axis energy by ocean current generator, blade dimensions is less, can directly with the processing of multi-shaft interlocked lathe one, and for the blade of higher power levels axle energy by ocean current generator, blade dimensions is longer, cannot adopt the processing of multi-shaft interlocked lathe one.The blade of existing relatively high power horizontal axis energy by ocean current generator, some uses and the similar blade of traditional horizontal shaft wind-driven generator vane, its method of manufacturing technology is the same with traditional horizontal shaft wind-driven generator vane, entirety glass fibre reinforced plastics manufactures, glass fibre reinforced plastic tensile Young's modulus is 19.71GPa, Young's modulus is lower, poorer than steel 10 times, density due to seawater is more than 1,000 times of air, therefore the load impacting that is subject to of the blade of energy by ocean current generator is large, this blade easily occurs that serious blade is waved and runout problem in energy by ocean current uses, the situation even bending occurring or fracture,
Some employing bronze material or stainless steel or alloyed steel manufacture blade, and blade is solid, and weight is large, and, because the blade of high-power energy by ocean current generator is longer, there is the problem of self-strength deficiency in the blade of bronze material, and, enough large lathe is not had to carry out blade integral processing yet, can only carry out manual grinding, manual grinding is taken a lot of work very much, and precision is inadequate, and own wt is very large, cost is also very high.
The marine site sand content of many ocean current energy abundances is high, such as offshore sea waters, Chinese Zhoushan.Traditional wind-driven generator composite material blade surface hardness is low, in blade movement process, is subject to grit impact, friction, very easily produces indenture or scuffing.In addition, in underwater environment, tip segment rotating speed is fast, easily produces cavitation erosion, causes tip segment more easily to produce damage.
In addition, in the running environment of ocean, the problem that must kink in the face of suspension fishing net, if energy by ocean current generator set is without self-protection measure, is wound around by fishing net, unit will occurs stuck, cannot run well, even cause the situation that whole unit damages.In addition, be different from atmosphere environment, ocean attachment is also the problem that must consider, bacterium, algae, and the growth of biological larva etc. can cause blade accelerated corrosion to damage.
Summary of the invention
The present invention is directed to above-mentioned deficiency of the prior art, provide a kind of and can resist trend load impacting, high strength, high rigidity, anti-grit impact friction, wear-resistant, blade tip cavitation, anti-fishing net are wound around, the blade of the higher power levels axle energy by ocean current generator of anti-marine organisms attachment and manufacture method thereof.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme:
The blade of higher power levels axle energy by ocean current generator, comprise hollow metal crossbeam, metal crossbeam broadens from top to bottom gradually, and on metal crossbeam, interval is welded with the horizonal web plate of several reinforcement rigidity, and the cross section of described metal crossbeam is
type, or
type, or
type, or
type, according to the succession of cross section, the rigidity of metal crossbeam increases successively, but processing technology difficulty increases successively; The top weld metal blade tip of metal crossbeam, metal blade tip is fixed with the first net-cutter, metal blade tip and the first net-cutter adopt four-axle linked lathe integrally manufactured, or, metal blade tip adopts four-axle linked lathe integrally manufactured, and metal blade tip welds the first net-cutter again, the bottom weld metal blade root of described metal crossbeam, metal blade root adopts four-axle linked lathe integrally manufactured, and metal blade root is the flange or tapped hole that are connected with the wheel hub of energy by ocean current generator; Metal crossbeam comprises the welding part of metal crossbeam and metal blade tip, first fibre cloth of solidifying and smearing through the first hybrid resin or infiltrating is wrapped up in the outside of welding part of metal crossbeam and metal blade root, first hybrid resin is formed by thermosetting resin and elastomer resin proportioning, wraps up the first fibre cloth and can increase outside metal crossbeam, smear binder utilization area the bonding force improving binder;
After being enclosed with the first fibre cloth (smear or infiltrate and have the first hybrid resin), at the bonding exterior skin of the outer side surface of metal crossbeam, the bonding inside panel of inner side surface of metal crossbeam, the leading flank of metal crossbeam and exterior skin, fill foam between inside panel and fill out core, the trailing flank of metal crossbeam and exterior skin, fill foam between inside panel and fill out core, foam fills out core and metal crossbeam, exterior skin, bonding between inside panel, exterior skin is also bonding with the connection part of the front-end and back-end of inside panel, the foam being positioned at metal crossbeam lower end is filled out on core and is plugged the second net-cutter, the blade of the second net-cutter exposes to exterior skin and inside panel, first net-cutter and the second net-cutter are all arranged on the sense of rotation side of blade, for cutting off the fishing net that seabed is wound around, the sense of rotation side of described blade is bonded with the leading edge metal bag sheet improving blade rigid and toughness, leading edge metal bag sheet is embedded at the vacancy position being positioned at exterior skin and inside panel front end, and leading edge metal bag sheet can to reduce in tidewater gravel bombardment friction to the damage of blade, blade surface is coated with the Antifouling paint preventing marine organisms from adhering to,
Described metal crossbeam adopts stainless steel, carbon steel, titanium alloy or other have the sheet metal of better intensity and toughness to be welded, described metal blade tip adopts stainless steel, nickel alloy, titanium alloy or other have better intensity and toughness and anti-cavitation, corrosion-resistant material, described metal blade root adopts stainless steel, carbon steel, titanium alloy or other have the metallic material of better intensity and toughness, described first net-cutter and the second net-cutter adopt stainless steel, the metallic material of titanium alloy or other high rigidity, described leading edge metal bag sheet adopts stainless steel, nickel alloy, titanium alloy or other is corrosion-resistant, high-toughness metal material,
Described first fibre cloth adopts glass fibre, carbon fiber, one or more combination of aramid fiber or other reinforcing fiber, described exterior skin and inside panel are by the second hybrid resin matched moulds compression and moulding through thermosetting resin and elastomer resin proportioning, described thermosetting resin adopts phenolic aldehyde, epoxy, amino, unsaturated polyester, the combination of the one or more than one of silicon ether resin or other resin, described elastomer resin adopts nitrile butadiene rubber, polyurethane elastomer, elastomer silicone, the combination of the one or more than one of polyacrylate elastomer or other modified epoxy, described foam is filled out core and is adopted PVC foam, PET foam, Nomex honeycomb or other foam, the combination of the one or more than one of cellular material.
As preferred a kind of scheme, described metal crossbeam employing cross section is
type or
the metal crossbeam of type,
type and
the metal crossbeam of type stretches out rib limit to both sides, warping rigidity when can increase blade rotary and flexural rigidity, and then improves the problem reversed, bend, wave when blade runs,
be fixed with connecting plate between the outer side surface of type metal crossbeam and inner side surface, the rigidity of metal crossbeam can be increased.
Further, the outer rim of described leading edge metal bag sheet is connected with the outer rim smooth transition of exterior skin and inside panel, smooth transition be connected be beneficial to reduce blade rotary time ocean current to the resistance of connection part.
Further, the length of described second net-cutter is greater than the length of the first net-cutter, the edge tilted of the first net-cutter and the second net-cutter is arranged, the afterbody of the first net-cutter is wide type, improve stressed with the area of contact of increase and metal blade tip, the afterbody of the second net-cutter is wide type, improves stressed to increase the area of contact of filling out core with foam.
Further, if metal blade tip welds with the first net-cutter, the welding part of metal blade tip and the first net-cutter also can through polishing process to reduce current drag and to increase attractive in appearance.
The manufacture method of the blade of higher power levels axle energy by ocean current generator, comprises the following steps:
(1) manufacture girder assembly, metal crossbeam is hollow-core construction, and on metal crossbeam, several horizonal web plate is welded to strengthen rigidity in interval, and the cross section of metal crossbeam is
type, or
type, or
type, or
type, the top weld metal blade tip of metal crossbeam, metal blade tip is fixed the first net-cutter, metal blade tip and the first net-cutter can adopt four-axle linked lathe integrally manufactured, or metal blade tip adopts four-axle linked lathe integrally manufactured, and then welds the first net-cutter on metal blade tip; The bottom weld metal blade root of metal crossbeam, metal blade root adopts four-axle linked lathe integrally manufactured, and four-axle linked lathe has four degrees of freedom spatially, integrally can process metal blade tip or metal blade root; The metal crossbeam being welded with metal blade tip and metal blade root forms girder assembly;
Described metal crossbeam by stainless steel, carbon steel, titanium alloy or other have the metal sheet hot of better intensity and toughness to prick, forge and press, be welded, described metal blade tip adopts stainless steel, nickel alloy, titanium alloy or other has better intensity and toughness and anti-cavitation, corrosion-resistant material manufacture form, described metal blade root adopt stainless steel, carbon steel, titanium alloy or other have the metallic material manufacture of better intensity and toughness to form;
(2) at first hybrid resin of the first fibre cloth surface smear by thermosetting resin and elastomer resin proportioning, or the first fibre cloth is carried out infiltration process by this first hybrid resin, the welding part of metal crossbeam and metal blade tip is comprised at the metal crossbeam of girder assembly, the outside of the welding part of metal crossbeam and metal blade root is wrapped up this first fibre cloth one and is enclosed to a few and be heating and curing, its objective is, binder is smeared in the outside of the metal crossbeam being enclosed with the first fibre cloth, the utilization area of binder can be increased, convenient and following exterior skin, it is bonding that inside panel has large contact surface to amass, in addition, smear binder with the direct outside at metal crossbeam to compare, binder smeared by the metal crossbeam being enclosed with the first fibre cloth, the bonding force of the latter's binder is larger,
Described first fibre cloth adopts one or more combination of glass fibre, carbon fiber, aramid fiber or other reinforcing fiber, described thermosetting resin adopts the combination of the one or more than one of phenolic aldehyde, epoxy, amino, unsaturated polyester, silicon ether resin or other resin, and described elastomer resin adopts the combination of the one or more than one of nitrile butadiene rubber, polyurethane elastomer, elastomer silicone, polyacrylate elastomer or other modified epoxy;
(3) exterior skin and inside panel is manufactured, at second hybrid resin of the second fibre cloth surface smear by thermosetting resin and elastomer resin proportioning, or the second fibre cloth is carried out infiltration process by this second hybrid resin, afterwards the second fibre cloth is carried out lamination laying, second fibre cloth of being laid by lamination is afterwards by the mould matched moulds compression and moulding of exterior skin and inside panel, cooling link afterwards can the demoulding after the second hybrid resin solidification, form exterior skin and the inside panel of glass steel material thus, the vacancy position being embedded leading edge metal bag sheet is left in the front end of exterior skin and inside panel,
Described second fibre cloth adopts one or more combination of glass fibre, carbon fiber, aramid fiber or other reinforcing fiber, described thermosetting resin adopts the combination of the one or more than one of phenolic aldehyde, epoxy, amino, unsaturated polyester, silicon ether resin or other resin, and described elastomer resin adopts the combination of the one or more than one of nitrile butadiene rubber, polyurethane elastomer, elastomer silicone, polyacrylate elastomer or other modified epoxy;
(4) by mould, foam is filled out core foaming, foam fills out the combination of one or more than one that core adopts PVC foam, PET foam, Nomex honeycomb or other foam, cellular material;
(5) shear leading edge metal bag sheet by size, leading edge metal bag sheet adopts stainless steel, nickel alloy, titanium alloy or other corrosion-resistant, high-toughness metal material;
(6) blades installation link: coat binder inside exterior skin, is placed in the metal crossbeam wrapping the first fibre cloth on exterior skin, and the outer side surface of metal crossbeam contacts with exterior skin is bonding; Foam is filled out core and coats the front and back that binder is placed on metal crossbeam, leading flank and the foam of metal crossbeam fill out that core is bonding to be contacted, and trailing flank and the foam of metal crossbeam fill out that core is bonding to be contacted, and the outer side surface that foam fills out core contacts with exterior skin is bonding; Fill out on core at the foam being positioned at metal crossbeam lower end and plug the second net-cutter, the root of the second net-cutter inserts foam and fills out in-core, and the blade of the second net-cutter exposes to exterior skin; Binder is coated inside inside panel, inside panel is covered metal crossbeam and foam is filled out on core, the inner side surface of metal crossbeam contacts with inside panel is bonding, and the inner side surface that foam fills out core contacts with inside panel is bonding, and exterior skin and inside panel contact the connection part of front-end and back-end is bonding; Binder is coated, bonding upper leading edge metal bag sheet afterwards on the vacancy position of exterior skin and inside panel front end.
(7) in the blade surface spraying antifouling coating that step (6) has manufactured, to prevent marine organisms from adhering to, individual blade manufactures complete.
As preferred a kind of scheme: described metal crossbeam employing cross section is
type or
the metal crossbeam of type,
type and
the metal crossbeam of type stretches out rib limit to both sides, warping rigidity when can increase blade rotary and flexural rigidity, and then improves the problem reversed, bend, wave when blade runs,
be fixed with connecting plate between the outer side surface of type metal crossbeam and inner side surface, the rigidity of metal crossbeam can be increased.
Further, the outer rim of described leading edge metal bag sheet is connected with the outer rim smooth transition of exterior skin and inside panel, smooth transition be connected be beneficial to reduce blade rotary time ocean current to the resistance of connection part.
Further, the length of described second net-cutter is greater than the length of the first net-cutter, the edge tilted of the first net-cutter and the second net-cutter is arranged, the afterbody of the first net-cutter is wide type, improve stressed with the area of contact of increase and metal blade tip, the afterbody of the second net-cutter is wide type, improves stressed to increase the area of contact of filling out core with foam.
Further, if metal blade tip welds with the first net-cutter, the welding part of metal blade tip and the first net-cutter also can through polishing process to reduce current drag and to increase attractive in appearance.
The invention has the beneficial effects as follows: in blade, be embedded hollow metal crossbeam, when ensuring the quality of products light, improving the strength and stiffness of blade, increasing counter-bending, the anti-torsion ability of blade; The blade of higher power levels axle energy by ocean current generator is longer, therefore adopt metal blade tip, metal crossbeam, method that metal blade root manufactures respectively, again by three's welding fabrication, the small volume of metal blade tip and metal blade root, can adopt four-axle linked lathe integrally manufactured respectively; Blade root metallic material, and weld with metal crossbeam, the stressed bearing capacity of raising root of blade that can be strong; Blade tip metallic material, and weld with metal crossbeam, effectively can strengthen blade tip rigidity, prevent cavitation erosion, gravel scratches, marine organisms adhere to; Leaf body front end is embedded leading edge metal bag sheet, and during blade rotary, leading edge metal bag sheet is beaten to ocean current, and the feature of high rigidity, high tenacity to reduce in tidewater gravel bombardment friction to the damage of leaf body; On metal crossbeam, parcel is solidified with first fibre cloth of smearing through the first hybrid resin or infiltrating, and wraps up the first fibre cloth and can improve the bonding force smear binder outside metal crossbeam after; The exterior skin of the outer side surface adhering glass steel matter of leaf in-vivo metal crossbeam, the inside panel of the inner side surface adhering glass steel matter of metallic material, fill foam between the side, front and back of metal crossbeam and exterior skin, inside panel and fill out core, it is composite material that exterior skin, inside panel and foam fill out core, such that leaf weight is light, intensity is large; Blade containing composite material (exterior skin, inside panel and foam fill out core) has larger damping, effectively can absorb the vibration and impact that blade is subject to, and enables blade adapt to the change fluctuation of tidewater flow velocity; Blade containing composite material (exterior skin, inside panel and foam fill out core) has enough precision, easy to manufacture and cost is low; Metal blade tip is fixed the first net-cutter, metal blade tip can be integrally manufactured by four-axle linked lathe with the first net-cutter, also can be integrally manufactured with four-axle linked lathe by metal blade tip, on metal blade tip, weld the first net-cutter again, the first net-cutter being positioned at blade tip place and the second net-cutter being positioned at blade root place can cut off the fishing net that seabed is wound around; Blade surface spraying antifouling coating, can prevent marine organisms from adhering to.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the embodiment one of the blade of higher power levels axle energy by ocean current generator of the present invention;
Fig. 2 is the structural drawing of the embodiment two of the blade of higher power levels axle energy by ocean current generator of the present invention;
Fig. 3 is the A-A sectional drawing of the embodiment of the present invention one;
Fig. 4 is the B-B sectional drawing of the embodiment of the present invention two;
Fig. 5 is the procedure chart of the blades installation link of the embodiment of the present invention one and embodiment two;
Fig. 6 is the structural drawing of the higher power levels axle marine tidal-current energy generator of the blade adopting the embodiment of the present invention one;
Fig. 7 is the cross-sectional view of the metal crossbeam of the embodiment of the present invention three;
Fig. 8 is the blade structure figure of the metal crossbeam adopting the embodiment of the present invention three;
Fig. 9 is the cross-sectional view of the metal crossbeam of the embodiment of the present invention four;
Figure 10 is the blade structure figure of the metal crossbeam adopting the embodiment of the present invention four;
Figure 11 is the cross-sectional view of the metal crossbeam of the embodiment of the present invention five;
Figure 12 is the blade structure figure of the metal crossbeam adopting the embodiment of the present invention five;
Figure 13 is the plan view of first net-cutter of the embodiment of the present invention one to embodiment five;
Figure 14 is the left view of first net-cutter of the embodiment of the present invention one to embodiment five;
Figure 15 is the plan view of second net-cutter of the embodiment of the present invention one to embodiment five;
Figure 16 is the left view of second net-cutter of the embodiment of the present invention one to embodiment five;
Drawing reference numeral: 10-metal crossbeam; 101-outer side surface; 102-inner side surface; 103-leading flank; 104-trailing flank; 105-horizonal web plate; The upper weld seam of 106-; Weld seam under 107-; 108-rib limit; 109-connecting plate; 11-metal blade tip; 12-first net-cutter; The blade of 121-first net-cutter; The afterbody of 122-first net-cutter; 13-metal blade root; 131-unthreaded hole; 132-flange plate; 132a-bolt hole; 133-tapped hole; 20-exterior skin; 201-vacancy position; 30-inside panel; 40-foam fills out core; 50-second net-cutter; The blade of 501-second net-cutter; The afterbody of 502-second net-cutter; 60-leading edge metal bag sheet; 70-blade; 80-wheel hub; 90-transmission and power generation system.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
Embodiment one
With reference to Fig. 1, Fig. 3, Fig. 5, Fig. 6, Figure 13-16: the blade of higher power levels axle energy by ocean current generator, comprise hollow metal crossbeam 10, metal crossbeam 10 broadens from top to bottom gradually, on metal crossbeam 10, interval is welded with the horizonal web plate 105 of several reinforcement rigidity, and the cross section of described metal crossbeam 10 is
type, the top weld metal blade tip 11 of metal crossbeam 10, metal blade tip 11 is fixed with the first net-cutter 12, metal blade tip 11 and the first net-cutter 12 adopt four-axle linked lathe integrally manufactured, or, metal blade tip 11 adopts four-axle linked lathe integrally manufactured, metal blade tip 11 welds again the first net-cutter 12, the bottom weld metal blade root 13 of described metal crossbeam 10, metal blade root 13 adopts four-axle linked lathe integrally manufactured, metal blade root 13 is the flange be connected with the wheel hub 80 of energy by ocean current generator, flange comprises unthreaded hole 131 and is positioned at the flange plate 132 that unthreaded hole 131 lower end and unthreaded hole 131 one is connected, flange plate 132 has bolt hole 132a, metal crossbeam 10 comprises the welding part of metal crossbeam 10 and metal blade tip 11, metal crossbeam 10 wraps up first fibre cloth of solidifying and smearing through the first hybrid resin or infiltrating with the outside of the welding part of metal blade root 13, first hybrid resin is formed by thermosetting resin and elastomer resin proportioning, wraps up the first fibre cloth and can increase outside metal crossbeam, smear binder utilization area the bonding force improving binder, in Fig. 1, metal crossbeam 10 and the welding part of metal blade tip 11 form upper weld seam 106, and metal crossbeam 10 and the welding part of metal blade root 13 form lower weld seam 107,
Fig. 6 is the structural drawing of the higher power levels axle marine tidal-current energy generator of the blade adopting the present embodiment, this higher power levels axle marine tidal-current energy generator comprises blade 70, wheel hub 80, transmission and power generation system 90, flange plate on blade 70 132 is bolted to connection with the wheelboss flange dish on wheel hub 80, and wheel hub can 80 front ends being connected to transmission and power generation system 90 rotationally;
After being enclosed with the first fibre cloth (smear or infiltrate and have the first hybrid resin), at the bonding exterior skin 20 of the outer side surface 101 of metal crossbeam 10, the bonding inside panel 30 of inner side surface 102 of metal crossbeam 10, leading flank 103 and the exterior skin 20 of metal crossbeam 10, fill foam between inside panel 30 and fill out core 40, trailing flank 104 and the exterior skin 20 of metal crossbeam 10, fill foam between inside panel 30 and fill out core 40, foam fills out core 40 and metal crossbeam 10, exterior skin 20, bonding between inside panel 30, exterior skin 20 is also bonding with the connection part of the front-end and back-end of inside panel 30, the foam being positioned at metal crossbeam 10 lower end is filled out on core 40 and is plugged the second net-cutter 50, the blade 501 of the second net-cutter exposes to exterior skin 20 and inside panel 30, first net-cutter 12 and the second net-cutter 50 are all arranged on the sense of rotation side of blade, the fishing net that seabed is wound around can be cut off during blade rotary, the sense of rotation side of described blade is bonded with the leading edge metal bag sheet 60 improving blade rigid and toughness, leading edge metal bag sheet 60 is embedded at the vacancy position 201 being positioned at exterior skin 20 and inside panel 30 front end, and leading edge metal bag sheet 60 can to reduce in tidewater gravel bombardment friction to the damage of blade, blade surface is coated with the Antifouling paint preventing marine organisms from adhering to,
Described metal crossbeam 10 adopts stainless steel, carbon steel, titanium alloy or other have the sheet metal of better intensity and toughness to be welded, described metal blade tip 11 adopts stainless steel, nickel alloy, titanium alloy or other have better intensity and toughness and anti-cavitation, corrosion-resistant material, described metal blade root 13 adopts stainless steel, carbon steel, titanium alloy or other have the metallic material of better intensity and toughness, described first net-cutter 12 and the second net-cutter 50 adopt stainless steel, the metallic material of titanium alloy or other high rigidity, described leading edge metal bag sheet 60 adopts stainless steel, nickel alloy, titanium alloy or other is corrosion-resistant, high-toughness metal material,
Described first fibre cloth adopts glass fibre, carbon fiber, one or more combination of aramid fiber or other reinforcing fiber, described exterior skin 20 and inside panel 30 are by the second hybrid resin matched moulds compression and moulding through thermosetting resin and elastomer resin proportioning, described thermosetting resin adopts phenolic aldehyde, epoxy, amino, unsaturated polyester, the combination of the one or more than one of silicon ether resin or other resin, described elastomer resin adopts nitrile butadiene rubber, polyurethane elastomer, elastomer silicone, the combination of the one or more than one of polyacrylate elastomer or other modified epoxy, described foam is filled out core 40 and is adopted PVC foam, PET foam, Nomex honeycomb or other foam, the combination of the one or more than one of cellular material.
The outer rim of described leading edge metal bag sheet 60 is connected with the outer rim smooth transition of exterior skin 20 and inside panel 30, smooth transition be connected be beneficial to reduce blade rotary time ocean current to the resistance of connection part.
The length of described second net-cutter 50 is greater than the length of the first net-cutter 12, the blade 121 of the first net-cutter and the blade 501 of the second net-cutter are obliquely installed, the afterbody 122 of the first net-cutter is wide type, improve stressed with the area of contact of increase and metal blade tip 11, the afterbody 502 of the second net-cutter is wide type, improves stressed to increase the area of contact of filling out core 40 with foam.
If metal blade tip 11 welds with the first net-cutter 12, the welding part of metal blade tip 11 and the first net-cutter 12 also can through polishing process to reduce current drag and to increase attractive in appearance.
In the present invention, the welding part (upper weld seam) of described metal crossbeam and metal blade tip also will wrap up first fibre cloth of smearing through the first hybrid resin or infiltrating, Bond will be coated in the welding part (upper weld seam) of metal crossbeam and metal blade tip afterwards, be stained with exterior skin and inside panel, the welding part (lower weld seam) of metal crossbeam and metal blade root also will wrap up first fibre cloth of smearing through the first hybrid resin or infiltrating, Bond will be coated in the welding part (lower weld seam) of metal crossbeam and metal blade root afterwards, is stained with exterior skin and inside panel.In the present invention, metal blade tip and metal blade root are (not bonding exterior skin, the inside panels) that expose, but the welding part of metal crossbeam and metal blade tip (upper weld seam), metal crossbeam will wrap up the first fibre cloth and bonding exterior skin, inside panel with the welding part (lower weld seam) of metal blade root.
The manufacture method of the blade of above-mentioned higher power levels axle energy by ocean current generator, comprises the following steps:
(1) manufacture girder assembly, metal crossbeam 10 is hollow-core construction, and on metal crossbeam 10, several horizonal web plate 105 is welded to strengthen rigidity in interval, and the cross section of metal crossbeam 10 is
type, or
type, or
type, or
type, the top weld metal blade tip 11 of metal crossbeam 10, metal blade tip is fixed the first net-cutter 12, metal blade tip 11 and the first net-cutter 12 can adopt four-axle linked lathe integrally manufactured, or, metal blade tip 11 adopts four-axle linked lathe integrally manufactured, and then on metal blade tip 11, weld the first net-cutter 12; The bottom weld metal blade root 13 of metal crossbeam 10, metal blade root 13 adopts four-axle linked lathe integrally manufactured, and four-axle linked lathe has four degrees of freedom spatially, integrally can process metal blade tip 11 or metal blade root 13; The metal crossbeam being welded with metal blade tip 11 and metal blade root 13 forms girder assembly;
Described metal crossbeam 10 by stainless steel, carbon steel, titanium alloy or other have the metal sheet hot of better intensity and toughness to prick, forge and press, be welded, described metal blade tip 11 adopts stainless steel, nickel alloy, titanium alloy or other has better intensity and toughness and anti-cavitation, corrosion-resistant material manufacture form, described metal blade root 13 adopt stainless steel, carbon steel, titanium alloy or other have the metallic material manufacture of better intensity and toughness to form;
(2) at first hybrid resin of the first fibre cloth surface smear by thermosetting resin and elastomer resin proportioning, or the first fibre cloth is carried out infiltration process by this first hybrid resin, the welding part (upper weld seam) of metal crossbeam and metal blade tip is comprised at the metal crossbeam 10 of girder assembly, the outside of the welding part (lower weld seam) of metal crossbeam and metal blade root is wrapped up this first fibre cloth one and is enclosed to a few and be heating and curing, its objective is, binder is smeared in the outside of the metal crossbeam being enclosed with the first fibre cloth, the utilization area of binder can be increased, convenient and following exterior skin 20, it is bonding that inside panel 30 has large contact surface to amass, in addition, smear binder with the direct outside at metal crossbeam to compare, binder smeared by the metal crossbeam being enclosed with the first fibre cloth, the bonding force of the latter's binder is larger, in addition, metal crossbeam 10 and exterior skin 20, inside panel 30 is all rigidity, there is a lot of space, and the first fibre cloth is soft, these spaces can be filled,
Described first fibre cloth adopts one or more combination of glass fibre, carbon fiber, aramid fiber or other reinforcing fiber, described thermosetting resin adopts the combination of the one or more than one of phenolic aldehyde, epoxy, amino, unsaturated polyester, silicon ether resin or other resin, and described elastomer resin adopts the combination of the one or more than one of nitrile butadiene rubber, polyurethane elastomer, elastomer silicone, polyacrylate elastomer or other modified epoxy;
(3) exterior skin 20 and inside panel 30 is manufactured, at second hybrid resin of the second fibre cloth surface smear by thermosetting resin and elastomer resin proportioning, or the second fibre cloth is carried out infiltration process by this second hybrid resin, afterwards the second fibre cloth is carried out lamination laying, afterwards the second fibre cloth that lamination is laid is passed through the mould matched moulds compression and moulding of exterior skin 20 and inside panel 30, cooling link afterwards can the demoulding after the second hybrid resin solidification, form exterior skin 20 and the inside panel 30 of glass steel material thus, the vacancy position 201 being embedded leading edge metal bag sheet 60 is left in the front end of exterior skin 20 and inside panel 30,
Described second fibre cloth adopts one or more combination of glass fibre, carbon fiber, aramid fiber or other reinforcing fiber, described thermosetting resin adopts the combination of the one or more than one of phenolic aldehyde, epoxy, amino, unsaturated polyester, silicon ether resin or other resin, and described elastomer resin adopts the combination of the one or more than one of nitrile butadiene rubber, polyurethane elastomer, elastomer silicone, polyacrylate elastomer or other modified epoxy;
(4) by mould, foam is filled out core 40 foaming, foam fills out the combination of one or more than one that core 40 adopts PVC foam, PET foam, Nomex honeycomb or other foam, cellular material;
(5) shear leading edge metal bag sheet 60 by size, leading edge metal bag sheet 60 adopts stainless steel, nickel alloy, titanium alloy or other corrosion-resistant, high-toughness metal material;
(6) blades installation link: coat binder inside exterior skin 20, is placed in the metal crossbeam 10 wrapping the first fibre cloth on exterior skin 20, and the outer side surface 101 of metal crossbeam 10 contacts with exterior skin 20 is bonding; Foam is filled out core 40 and coats the front and back that binder is placed on metal crossbeam 10, leading flank 103 and the foam of metal crossbeam 10 fill out that core 40 is bonding to be contacted, trailing flank 104 and the foam of metal crossbeam 10 fill out that core 40 is bonding to be contacted, and the outer side surface that foam fills out core 40 contacts with exterior skin 20 is bonding; Filling out at the foam being positioned at metal crossbeam 10 lower end root insertion foam core 40 plugging the second net-cutter 50, second net-cutter 50 fills out in core 40, and the blade 501 of the second net-cutter exposes to exterior skin 20; Binder is coated inside inside panel 30, inside panel 30 is covered metal crossbeam 10 and foam is filled out on core 40, the inner side surface of metal crossbeam 10 contacts with inside panel 30 is bonding, the inner side surface that foam fills out core 40 contacts with inside panel 30 is bonding, and exterior skin 20 and inside panel 30 contact the connection part of front-end and back-end is bonding; Binder is coated, bonding upper leading edge metal bag sheet 60 afterwards on the vacancy position 201 of exterior skin 20 and inside panel 30 front end.
(7) in the blade surface spraying antifouling coating that step (6) has manufactured, to prevent marine organisms from adhering to, individual blade manufactures complete.
In the manufacture method of the blade of above-mentioned higher power levels axle energy by ocean current generator, the outer rim of described leading edge metal bag sheet 60 is connected with the outer rim smooth transition of exterior skin 20 and inside panel 30, smooth transition be connected be beneficial to reduce blade rotary time ocean current to the resistance of connection part.
The length of described second net-cutter 50 is greater than the length of the first net-cutter 12, the blade 121 of the first net-cutter and the blade 501 of the second net-cutter are obliquely installed, the afterbody 122 of the first net-cutter is wide type, improve stressed with the area of contact of increase and metal blade tip 11, the afterbody 502 of the second net-cutter is wide type, improves stressed to increase the area of contact of filling out core 40 with foam.
If metal blade tip 11 welds with the first net-cutter 12, the welding part of metal blade tip 11 and the first net-cutter 12 also can through polishing process to reduce current drag and to increase attractive in appearance.
Embodiment two
With reference to Fig. 2, Fig. 4, Fig. 5, Figure 13-16: the present embodiment also adopts cross section to be
the metal crossbeam 10 of type, the present embodiment is with the difference of embodiment one: metal blade root 13 is the tapped hole 133 be connected with the wheel hub 80 of energy by ocean current generator, this tapped hole 133 is interior threaded hole, and this interior threaded hole is threaded with the outside threaded holes on the wheel hub 80 of energy by ocean current generator.
Embodiment three
With reference to Fig. 7, Fig. 8, Figure 13-16: the difference of the present embodiment and embodiment one is: the cross section of metal crossbeam 10 is
type, adopting should
the structural drawing of the blade of the metal crossbeam of type cross section as shown in Figure 8.
Embodiment four
With reference to Fig. 9, Figure 10, Figure 13-16: the difference of the present embodiment and embodiment one is: the cross section of metal crossbeam 10 is
type, adopting should
the structural drawing of the blade of the metal crossbeam of type cross section as shown in Figure 10.?
on the basis of type metal crossbeam,
type metal crossbeam stretches out rib limit 108 to both sides, warping rigidity when can increase blade rotary like this and flexural rigidity, and then improves the problem reversed, bend, wave when blade runs.
Embodiment five
With reference to Figure 11-16: the difference of the present embodiment and embodiment four is: the cross section of metal crossbeam 10 is
type, adopting should
the structural drawing of the blade of the metal crossbeam of type cross section as shown in figure 12.Embodiment's four
on the basis of type metal crossbeam,
connecting plate 109 is also fixed with, to increase the rigidity of metal crossbeam between the outer side surface of type metal crossbeam and inner side surface.
Above-mentioned cross section is
type,
type,
type,
the metal crossbeam of type, according to order to the right, the rigidity of metal crossbeam increases successively, but processing technology difficulty also increases successively.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the blade of higher power levels axle energy by ocean current generator, is characterized in that: comprise hollow metal crossbeam, metal crossbeam broadens from top to bottom gradually, and on metal crossbeam, interval is welded with the horizonal web plate of several reinforcement rigidity, and the cross section of described metal crossbeam is
type, or
type, or
type, or
type, according to the succession of cross section, the rigidity of metal crossbeam increases successively, but processing technology difficulty increases successively; The top weld metal blade tip of metal crossbeam, metal blade tip is fixed with the first net-cutter, metal blade tip and the first net-cutter adopt four-axle linked lathe integrally manufactured, or, metal blade tip adopts four-axle linked lathe integrally manufactured, and metal blade tip welds the first net-cutter again, the bottom weld metal blade root of described metal crossbeam, metal blade root adopts four-axle linked lathe integrally manufactured, and metal blade root is the flange or tapped hole that are connected with the wheel hub of energy by ocean current generator; Metal crossbeam comprises the welding part of metal crossbeam and metal blade tip, first fibre cloth of solidifying and smearing through the first hybrid resin or infiltrating is wrapped up in the outside of welding part of metal crossbeam and metal blade root, first hybrid resin is formed by thermosetting resin and elastomer resin proportioning, wraps up the first fibre cloth and can increase outside metal crossbeam, smear binder utilization area the bonding force improving binder;
After being enclosed with the first fibre cloth, at the bonding exterior skin of the outer side surface of metal crossbeam, the bonding inside panel of inner side surface of metal crossbeam, the leading flank of metal crossbeam and exterior skin, fill foam between inside panel and fill out core, the trailing flank of metal crossbeam and exterior skin, fill foam between inside panel and fill out core, foam fills out core and metal crossbeam, exterior skin, bonding between inside panel, exterior skin is also bonding with the connection part of the front-end and back-end of inside panel, the foam being positioned at metal crossbeam lower end is filled out on core and is plugged the second net-cutter, the blade of the second net-cutter exposes to exterior skin and inside panel, first net-cutter and the second net-cutter are all arranged on the sense of rotation side of blade, for cutting off the fishing net that seabed is wound around, the sense of rotation side of described blade is bonded with the leading edge metal bag sheet improving blade rigid and toughness, leading edge metal bag sheet is embedded at the vacancy position being positioned at exterior skin and inside panel front end, and leading edge metal bag sheet can to reduce in tidewater gravel bombardment friction to the damage of blade, blade surface is coated with the Antifouling paint preventing marine organisms from adhering to,
Described metal crossbeam adopts stainless steel, carbon steel, titanium alloy or other have the sheet metal of better intensity and toughness to be welded, described metal blade tip adopts stainless steel, nickel alloy, titanium alloy or other have better intensity and toughness and anti-cavitation, corrosion-resistant material, described metal blade root adopts stainless steel, carbon steel, titanium alloy or other have the metallic material of better intensity and toughness, described first net-cutter and the second net-cutter adopt stainless steel, the metallic material of titanium alloy or other high rigidity, described leading edge metal bag sheet adopts stainless steel, nickel alloy, titanium alloy or other is corrosion-resistant, high-toughness metal material,
Described first fibre cloth adopts glass fibre, carbon fiber, one or more combination of aramid fiber or other reinforcing fiber, described exterior skin and inside panel are by the second hybrid resin matched moulds compression and moulding through thermosetting resin and elastomer resin proportioning, described thermosetting resin adopts phenolic aldehyde, epoxy, amino, unsaturated polyester, the combination of the one or more than one of silicon ether resin or other resin, described elastomer resin adopts nitrile butadiene rubber, polyurethane elastomer, elastomer silicone, the combination of the one or more than one of polyacrylate elastomer or other modified epoxy, described foam is filled out core and is adopted PVC foam, PET foam, Nomex honeycomb or other foam, the combination of the one or more than one of cellular material.
2. the blade of higher power levels axle energy by ocean current generator as claimed in claim 1, is characterized in that: described metal crossbeam employing cross section is
type or
the metal crossbeam of type,
type and
the metal crossbeam of type stretches out rib limit to both sides, warping rigidity when can increase blade rotary and flexural rigidity, and then improves the problem reversed, bend, wave when blade runs,
be fixed with connecting plate between the outer side surface of type metal crossbeam and inner side surface, the rigidity of metal crossbeam can be increased.
3. the blade of higher power levels axle energy by ocean current generator as claimed in claim 1 or 2, it is characterized in that: the outer rim of described leading edge metal bag sheet is connected with the outer rim smooth transition of exterior skin and inside panel, smooth transition be connected be beneficial to reduce blade rotary time ocean current to the resistance of connection part.
4. the blade of higher power levels axle energy by ocean current generator as claimed in claim 3, it is characterized in that: the length of described second net-cutter is greater than the length of the first net-cutter, the edge tilted of the first net-cutter and the second net-cutter is arranged, the afterbody of the first net-cutter is wide type, improve stressed with the area of contact of increase and metal blade tip, the afterbody of the second net-cutter is wide type, improves stressed to increase the area of contact of filling out core with foam.
5. the blade of higher power levels axle energy by ocean current generator as claimed in claim 4, it is characterized in that: if metal blade tip welds with the first net-cutter, the welding part of metal blade tip and the first net-cutter also can through polishing process to reduce current drag and to increase attractive in appearance.
6. the manufacture method of the blade of higher power levels axle energy by ocean current generator as claimed in claim 1, is characterized in that comprising the following steps:
(1) manufacture girder assembly, metal crossbeam is hollow-core construction, and on metal crossbeam, several horizonal web plate is welded to strengthen rigidity in interval, and the cross section of metal crossbeam is
type, or
type, or
type, or
type, the top weld metal blade tip of metal crossbeam, metal blade tip is fixed the first net-cutter, metal blade tip and the first net-cutter can adopt four-axle linked lathe integrally manufactured, or metal blade tip adopts four-axle linked lathe integrally manufactured, and then welds the first net-cutter on metal blade tip; The bottom weld metal blade root of metal crossbeam, metal blade root adopts four-axle linked lathe integrally manufactured, and four-axle linked lathe has four degrees of freedom spatially, integrally can process metal blade tip or metal blade root; The metal crossbeam being welded with metal blade tip and metal blade root forms girder assembly;
Described metal crossbeam by stainless steel, carbon steel, titanium alloy or other have the metal sheet hot of better intensity and toughness to prick, forge and press, be welded, described metal blade tip adopts stainless steel, nickel alloy, titanium alloy or other has better intensity and toughness and anti-cavitation, corrosion-resistant material manufacture form, described metal blade root adopt stainless steel, carbon steel, titanium alloy or other have the metallic material manufacture of better intensity and toughness to form;
(2) at first hybrid resin of the first fibre cloth surface smear by thermosetting resin and elastomer resin proportioning, or the first fibre cloth is carried out infiltration process by this first hybrid resin, the welding part of metal crossbeam and metal blade tip is comprised at the metal crossbeam of girder assembly, the outside of the welding part of metal crossbeam and metal blade root is wrapped up this first fibre cloth one and is enclosed to a few and be heating and curing, its objective is, binder is smeared in the outside of the metal crossbeam being enclosed with the first fibre cloth, the utilization area of binder can be increased, convenient and following exterior skin, it is bonding that inside panel has large contact surface to amass, in addition, smear binder with the direct outside at metal crossbeam to compare, binder smeared by the metal crossbeam being enclosed with the first fibre cloth, the bonding force of the latter's binder is larger,
Described first fibre cloth adopts one or more combination of glass fibre, carbon fiber, aramid fiber or other reinforcing fiber, described thermosetting resin adopts the combination of the one or more than one of phenolic aldehyde, epoxy, amino, unsaturated polyester, silicon ether resin or other resin, and described elastomer resin adopts the combination of the one or more than one of nitrile butadiene rubber, polyurethane elastomer, elastomer silicone, polyacrylate elastomer or other modified epoxy;
(3) exterior skin and inside panel is manufactured, at second hybrid resin of the second fibre cloth surface smear by thermosetting resin and elastomer resin proportioning, or the second fibre cloth is carried out infiltration process by this second hybrid resin, afterwards the second fibre cloth is carried out lamination laying, second fibre cloth of being laid by lamination is afterwards by the mould matched moulds compression and moulding of exterior skin and inside panel, cooling link afterwards can the demoulding after the second hybrid resin solidification, form exterior skin and the inside panel of glass steel material thus, the vacancy position being embedded leading edge metal bag sheet is left in the front end of exterior skin and inside panel,
Described second fibre cloth adopts one or more combination of glass fibre, carbon fiber, aramid fiber or other reinforcing fiber, described thermosetting resin adopts the combination of the one or more than one of phenolic aldehyde, epoxy, amino, unsaturated polyester, silicon ether resin or other resin, and described elastomer resin adopts the combination of the one or more than one of nitrile butadiene rubber, polyurethane elastomer, elastomer silicone, polyacrylate elastomer or other modified epoxy;
(4) by mould, foam is filled out core foaming, foam fills out the combination of one or more than one that core adopts PVC foam, PET foam, Nomex honeycomb or other foam, cellular material;
(5) shear leading edge metal bag sheet by size, leading edge metal bag sheet adopts stainless steel, nickel alloy, titanium alloy or other corrosion-resistant, high-toughness metal material;
(6) blades installation link: coat binder inside exterior skin, is placed in the metal crossbeam wrapping the first fibre cloth on exterior skin, and the outer side surface of metal crossbeam contacts with exterior skin is bonding; Foam is filled out core and coats the front and back that binder is placed on metal crossbeam, leading flank and the foam of metal crossbeam fill out that core is bonding to be contacted, and trailing flank and the foam of metal crossbeam fill out that core is bonding to be contacted, and the outer side surface that foam fills out core contacts with exterior skin is bonding; Fill out on core at the foam being positioned at metal crossbeam lower end and plug the second net-cutter, the root of the second net-cutter inserts foam and fills out in-core, and the blade of the second net-cutter exposes to exterior skin; Binder is coated inside inside panel, inside panel is covered metal crossbeam and foam is filled out on core, the inner side surface of metal crossbeam contacts with inside panel is bonding, and the inner side surface that foam fills out core contacts with inside panel is bonding, and exterior skin and inside panel contact the connection part of front-end and back-end is bonding; Binder is coated, bonding upper leading edge metal bag sheet afterwards on the vacancy position of exterior skin and inside panel front end.
(7) in the blade surface spraying antifouling coating that step (6) has manufactured, to prevent marine organisms from adhering to, individual blade manufactures complete.
7. the manufacture method of the blade of higher power levels axle energy by ocean current generator as claimed in claim 6, is characterized in that: described metal crossbeam employing cross section is
type or
the metal crossbeam of type,
type and
the metal crossbeam of type stretches out rib limit to both sides, warping rigidity when can increase blade rotary and flexural rigidity, and then improves the problem reversed, bend, wave when blade runs,
be fixed with connecting plate between the outer side surface of type metal crossbeam and inner side surface, the rigidity of metal crossbeam can be increased.
8. the manufacture method of the blade of higher power levels axle energy by ocean current generator as claimed in claims 6 or 7, it is characterized in that: the outer rim of described leading edge metal bag sheet is connected with the outer rim smooth transition of exterior skin and inside panel, smooth transition be connected be beneficial to reduce blade rotary time ocean current to the resistance of connection part.
9. the manufacture method of the blade of higher power levels axle energy by ocean current generator as claimed in claim 8, it is characterized in that: the length of described second net-cutter is greater than the length of the first net-cutter, the edge tilted of the first net-cutter and the second net-cutter is arranged, the afterbody of the first net-cutter is wide type, improve stressed with the area of contact of increase and metal blade tip, the afterbody of the second net-cutter is wide type, improves stressed to increase the area of contact of filling out core with foam.
10. the manufacture method of the blade of higher power levels axle energy by ocean current generator as claimed in claim 9, it is characterized in that: if metal blade tip welds with the first net-cutter, the welding part of metal blade tip and the first net-cutter also can through polishing process to reduce current drag and to increase attractive in appearance.
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| CN115929538B (en) * | 2023-02-08 | 2023-05-02 | 新创碳谷集团有限公司 | Composite wind power blade of box girder and manufacturing method thereof |
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