CN204386815U - Lengthen the linkage structure of wind turbine blade root - Google Patents
Lengthen the linkage structure of wind turbine blade root Download PDFInfo
- Publication number
- CN204386815U CN204386815U CN201520037315.3U CN201520037315U CN204386815U CN 204386815 U CN204386815 U CN 204386815U CN 201520037315 U CN201520037315 U CN 201520037315U CN 204386815 U CN204386815 U CN 204386815U
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- Prior art keywords
- mounting hole
- blade root
- radial mounting
- connecting cylinder
- root connecting
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- 230000005611 electricity Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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- Y02E10/722—
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- Wind Motors (AREA)
Abstract
Lengthen the linkage structure of wind turbine blade root, comprise blade root connecting cylinder, along the axial mounting hole that blade root connecting cylinder end face even circumferential is spaced apart, along the radial mounting hole of blade root connecting cylinder barrel circumference distribution, the intersection nut being arranged on the double threaded screw in axial mounting hole and being arranged in radial mounting hole, axial mounting hole is corresponding with radial mounting hole and form T-shaped mounting hole with radial mounting hole UNICOM, one end of double threaded screw extend in radial mounting hole with intersect fastening nuts, the other end of double threaded screw stretches out described blade root connecting cylinder end face, adjacent radial mounting hole is in staggered distribution on the barrel of blade root connecting cylinder, the medial axis of adjacent radial mounting hole is unequal apart from the axial distance of blade root connecting cylinder end face, the length that double threaded screw stretches out institute's blade root connecting cylinder end face is equal.Under radial mounting hole number increases situation, also not easily there is breakage in the blade body between radial mounting hole.
Description
Technical field
The utility model relates to lengthening wind turbine mounting technique field, particularly lengthens the linkage structure of wind turbine blade root.
Background technique
At present, wind electricity blade installs the bolt assembly connected is installed in more employing in hole method in root of blade punching, the blade root of wind electricity blade is drum, barrel circumference first along blade root during punching gets fixing radial mounting hole, the axial mounting hole connected is beaten again from root of blade end face along blade root Axial-running Out, intersection model nut is installed in radial mounting hole, axial connecting screw rod to be arranged in axial mounting hole and with intersect fastening nuts, namely complete machine wheel hub connecting screw rod being connected to wind-powered electricity generation leaf completes the connection of wind electricity blade.Blade carrying process in, blade transfers loads to blade root, blade root by intersect nut by dynamic changes process give axial connecting screw rod, by axial connecting screw rod by dynamic changes process on complete machine wheel hub.Wind electricity blade adopts epoxy resin cure shaping obtained mostly, the size of blade wind electricity blade constantly lengthens and the blade root diameter of drum and wall thickness do not have too large change, the load of blade root constantly increases, for solving the problem of the decrease of fatigue strength of the bolt assembly caused after blade root load increases, usually the number increasing bolt assembly can be adopted to improve the fatigue strength of bolt assembly, increase the number of bolt assembly, just need to increase the radial mounting hole of blade root and the quantity of axial mounting hole, wherein radial mounting hole is evenly spaced on blade root barrel circumferentially arranges, the main axis of each radial mounting hole is all identical apart from the distance of blade root end face, the number increasing radial mounting hole makes the circumferential distance between radial mounting hole reduced, blade body lower thickness between radial mounting hole, the number of axial mounting hole increases many, between axial mounting hole circumferential distance also reduced, the lower thickness of the blade body between axial mounting hole, and the diameter in installation aperture and radial mounting hole that the installation aperture intersecting nut is greater than axial connecting screw rod is greater than the diameter of axial mounting hole, when bolt assembly number increases, the thickness of the blade body between the axial mounting hole of Thickness Ratio of the blade body between radial mounting hole is less, the bearing capacity of the blade body between radial mounting hole is lower, when radial mounting hole and axial mounting hole number constantly increase, blade body bearing capacity between radial mounting hole can obviously decline, in wind electricity blade operation process, at the radial mounting hole place of blade root, blade occurs that damaged probability is the highest, blade breakage causes the decline of the working efficiency of wind turbine, namely the frequency of maintenance of blade and the maintenance cost of wind turbine is added, shorten the working life of blade, the working efficiency of wind turbine is also impacted.
Model utility content
Blade body after the utility model increases for radial mounting hole number in prior art between radial mounting hole easily occur breakage cause blade working life long and blade frequency of maintenance and cost increase, reduce the Problem Technical of wind turbine working efficiency, provide a kind of linkage structure lengthening wind turbine blade root, under radial mounting hole number increases situation, also not easily there is breakage in the blade body between radial mounting hole, the bearing capacity that improve blade root extends the working life of blade, reduces the frequency of maintenance of blade.
In order to achieve the above object, the technical solution adopted in the utility model is: the linkage structure lengthening wind turbine blade root, comprise blade root connecting cylinder, along the axial mounting hole that blade root connecting cylinder end face even circumferential is spaced apart, along the radial mounting hole of blade root connecting cylinder barrel circumference distribution, the intersection nut being arranged on the double threaded screw in axial mounting hole and being arranged in radial mounting hole, axial mounting hole is corresponding with radial mounting hole and form T-shaped mounting hole with radial mounting hole UNICOM, one end of double threaded screw extend in radial mounting hole with intersect fastening nuts, the other end of double threaded screw stretches out described blade root connecting cylinder end face, it is characterized in that adjacent described radial mounting hole is in staggered distribution on the barrel of described blade root connecting cylinder, the medial axis of adjacent radial mounting hole is unequal apart from the axial distance of described blade root connecting cylinder end face, the length that described double threaded screw stretches out described blade root connecting cylinder end face is equal.
Further, described radial mounting hole comprises the radial mounting hole in equal front row, aperture and the radial mounting hole of rear row, the radial mounting hole in described front row is along the same circumference uniform intervals distribution of described blade root connecting cylinder barrel circumference, the described radial mounting hole of rear row is along the same circumference uniform intervals distribution of described blade root connecting cylinder barrel circumference, the medial axis of the radial mounting hole in described front row is less than the axial distance of medial axis apart from described blade root connecting cylinder end face of the radial mounting hole of rear row apart from the axial distance of described blade root connecting cylinder end face, the radial mounting hole in described front row and the described radial mounting hole of rear row are alternately distributed, the radial mounting hole of rear row described in one is provided with between the radial mounting hole in front row described in two.
Further, the circumferential distance along described blade root connecting cylinder barrel between the radial mounting hole in described front row with the radial mounting hole of rear row is equal with axial distance.
Further, external diameter and the internal diameter of described blade root connecting cylinder are respectively D1 and D2, and the medial axis of described axial mounting hole is all that the circumference of (D1+D2)/2 is tangent with diameter.
Further, described double threaded screw comprises short double threaded screw and long double threaded screw, described short double threaded screw extend in the radial mounting hole in described front row with the described fastening nuts that intersects, described long double threaded screw extend into described rear row's radial direction install in footpath with the described fastening nuts that intersects, the distance that described short double threaded screw stretches out described blade root connecting cylinder end face equals the distance that described long double threaded screw stretches out described blade root connecting cylinder end face.
Further, the diameter of described radial mounting hole is D3, and the quantity of described axial mounting hole is equal to or less than the integer value of 0.79 × π × (D1+D2)/2D3.
The beneficial effects of the utility model are: the radial mounting hole in the utility model blade root connecting cylinder barrel on be in staggered distribution, circumferentially do not arrange between adjacent radial mounting hole, the medial axis of adjacent radial mounting hole is unequal apart from the axial distance of blade root connecting cylinder end face, distance along blade root connecting cylinder barrel between radial mounting hole increases, blade body thickness between radial mounting hole thickens, radial mounting hole is in staggered distribution and connects on barrel at blade root, the increase of radial mounting hole number also can not cause blade body thickness between radial mounting hole to reduce, the increase of radial mounting hole number can not reduce the bearing capacity of blade root connecting cylinder, blade root occurs that damaged probability reduces, namely the working life of blade is extended, also reduce the frequency of maintenance of blade, the working efficiency of wind turbine is higher.The distance that double threaded screw of the present utility model stretches out blade root connecting cylinder end face is equal, and the join strength that ensure that blade and wind-powered electricity generation complete machine wheel hub is not installed impact that hole, footpath is in staggered distribution on blade root connecting cylinder barrel by radial and reduced.
Accompanying drawing explanation
Fig. 1 is the plane structure schematic diagram of the linkage structure of lengthening wind turbine blade root of the prior art.
Fig. 2 is the plane structure schematic diagram of the linkage structure of lengthening wind turbine blade root of the present utility model.
Fig. 3 is the perspective view that radial mounting hole and axial mounting hole distribute on blade root connecting cylinder.
Fig. 4 is the perspective view of the linkage structure of lengthening wind turbine blade root of the present utility model.
Fig. 5 is the structural representation that axial mounting hole distributes at blade root connecting cylinder end face.
Fig. 6 is the front view of intersection nut.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.
As shown in Figures 2 to 6, lengthen the linkage structure of wind turbine blade root, comprise blade root connecting cylinder 1, along the axial mounting hole 11 that blade root connecting cylinder 1 end face even circumferential is spaced apart, along the radial mounting hole 12 of blade root connecting cylinder 1 barrel circumference distribution, the intersection nut 3 being arranged on the double threaded screw 2 in axial mounting hole 11 and being arranged in radial mounting hole 12, axial mounting hole 11 is corresponding with radial mounting hole 12 and form T-shaped mounting hole with radial mounting hole 12 UNICOM, one end of double threaded screw 2 extend in radial mounting hole 12 with to intersect nut 3 fastening, the other end of double threaded screw 2 stretches out described blade root connecting cylinder 1 end face, described radial mounting hole 12 comprises the radial mounting hole 12.1 in equal front row, aperture and the radial mounting hole 12.2 of rear row, the radial mounting hole 12.1 in described front row is along the same circumference uniform intervals distribution of described blade root connecting cylinder 1 barrel circumference, the described radial mounting hole of rear row 12.2 is along the same circumference uniform intervals distribution of described blade root connecting cylinder 1 barrel circumference, the medial axis of the radial mounting hole 12.1 in described front row is less than the axial distance of medial axis apart from described blade root connecting cylinder 1 end face of the radial mounting hole of rear row 12.2 apart from the axial distance of described blade root connecting cylinder 1 end face, the radial mounting hole 12.1 in described front row is alternately distributed with the radial mounting hole 12.2 of described rear row, the radial mounting hole 12.2 of rear row described in one is provided with between the radial mounting hole 12.1 in front row described in two.Described double threaded screw 2 comprises short double threaded screw 2.1 and long double threaded screw 2.2, it is fastening that described short double threaded screw 2.1 extend in the radial mounting hole 12.1 in described front row with the described nut 3 that intersects, described long double threaded screw 2.2 extend into described rear row, and radial to install in footpath 12.2 with the described nut 3 that intersects fastening, and the distance that described short double threaded screw 2.1 stretches out described blade root connecting cylinder 1 end face equals the distance that described long double threaded screw 2.2 stretches out described blade root connecting cylinder 1 end face.
The radial mounting hole 12.1 in described front row is equal with axial distance S2 with the circumferential distance S1 along described blade root connecting cylinder 1 barrel between the radial mounting hole of rear row 12.2.External diameter and the internal diameter of described blade root connecting cylinder 1 are respectively D1 and D2, and the medial axis of described axial mounting hole 11 is all that the circumference of (D1+D2)/2 is tangent with diameter.The diameter of described radial mounting hole 12 is D3, and the quantity of described axial mounting hole 11 is equal to or less than the integer value of 0.79 × π × (D1+D2)/2D3.
The barrel of blade root connecting cylinder 1 arranges the radial mounting hole in alternatively distributed front row 12.1 and the radial mounting hole 12.2 of rear row, the axial distance of medial axis distance blade root connecting cylinder 1 end face of front-seat radial mounting hole 12.1 is less than the axial distance of medial axis apart from blade root connecting cylinder 1 end face of the radial mounting hole 12.2 of rear row, namely the medial axis of front-seat radial mounting hole 12.1 and the medial axis of the radial mounting hole 12.2 of rear row be not on the same circumference of blade root connecting cylinder 1 circumference, front-seat radial mounting hole 12.1 and the radial mounting hole 12.2 of rear row are for being in staggered distribution, as shown in Figure 1, in prior art, radial mounting hole is in the same circumference uniform intervals distribution of blade root connecting cylinder circumference, in the Thickness Ratio prior art of the blade body between the radial mounting hole be in staggered distribution in the utility model aligned fashion radial mounting hole between blade body thickness want large, the large blade body bearing capacity then between radial mounting hole of blade body thickness is enhanced and not easily occurs breakage, increase the radial mounting hole be in staggered distribution, blade body thickness between radial mounting hole can not reduce, the increase of radial mounting hole number can not increase the breakage risk of blade root blade body, wherein minimum along the circumferential distance S1 of described blade root connecting cylinder 1 barrel the make quality of whole blade equal to axial distance S2 between front-seat radial mounting hole 12.1 with radial mounting hole 12.2, the heavy burden of blade is minimum.The quantity of axial mounting hole 11 is equal with the quantity of radial mounting hole 12, when the quantity of axial mounting hole 11 is less than or equal to the integer value of 0.79 × π × (D1+D2)/2D3, blade body intensity between radial mounting hole is the highest, bearing capacity is maximum, and blade root occurs that damaged risk is minimum.
Below by reference to the accompanying drawings complete description is carried out to the technological scheme of embodiment of the present utility model, it should be noted that described embodiment is only a part of embodiment of the present utility model.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, belongs to the scope of the utility model protection.
Claims (6)
1. lengthen the linkage structure of wind turbine blade root, comprise blade root connecting cylinder (1), along the axial mounting hole (11) that blade root connecting cylinder (1) end face even circumferential is spaced apart, along the radial mounting hole (12) of blade root connecting cylinder (1) barrel circumference distribution, the intersection nut (3) being arranged on the double threaded screw (2) in axial mounting hole (11) and being arranged in radial mounting hole (12), axial mounting hole (11) is corresponding with radial mounting hole (12) and form T-shaped mounting hole with radial mounting hole (12) UNICOM, one end of double threaded screw (2) extend in radial mounting hole (12) with to intersect nut (3) fastening, the other end of double threaded screw (2) stretches out described blade root connecting cylinder (1) end face, it is characterized in that adjacent described radial mounting hole (12) is in staggered distribution on the barrel of described blade root connecting cylinder (1), the medial axis of adjacent radial mounting hole (12) is unequal apart from the axial distance of described blade root connecting cylinder (1) end face, the length that described double threaded screw (2) stretches out described blade root connecting cylinder (1) end face is equal.
2. the linkage structure of lengthening wind turbine blade root according to claim 1, it is characterized in that described radial mounting hole (12) comprises the radial mounting hole (12.1) in equal front row, aperture and the radial mounting hole of rear row (12.2), the radial mounting hole (12.1) in described front row is along the same circumference uniform intervals distribution of described blade root connecting cylinder (1) barrel circumference, the described radial mounting hole of rear row (12.2) is along the same circumference uniform intervals distribution of described blade root connecting cylinder (1) barrel circumference, the medial axis of the radial mounting hole (12.1) in described front row is less than the axial distance of medial axis apart from described blade root connecting cylinder (1) end face of the radial mounting hole of rear row (12.2) apart from the axial distance of described blade root connecting cylinder (1) end face, the radial mounting hole (12.1) in described front row is alternately distributed with the described radial mounting hole of rear row (12.2), the radial mounting hole of rear row (12.2) described in one is provided with between the radial mounting hole (12.1) in front row described in two.
3. the linkage structure of lengthening wind turbine blade root according to claim 2, is characterized in that the radial mounting hole (12.1) in described front row is equal with axial distance with the circumferential distance along described blade root connecting cylinder (1) barrel between the radial mounting hole of rear row (12.2).
4. the linkage structure of lengthening wind turbine blade root according to claim 3, it is characterized in that external diameter and the internal diameter of described blade root connecting cylinder (1) are respectively D1 and D2, the medial axis of described axial mounting hole (11) is all that the circumference of (D1+D2)/2 is tangent with diameter.
5. the linkage structure of lengthening wind turbine blade root according to claim 4, it is characterized in that described double threaded screw (2) comprises short double threaded screw (2.1) and long double threaded screw (2.2), it is fastening that described short double threaded screw (2.1) extend in the radial mounting hole (12.1) in described front row with the described nut (3) that intersects, described long double threaded screw (2.2) extend into described rear row, and radial to install in footpath (12.2) with the described nut (3) that intersects fastening, the distance that described short double threaded screw (2.1) stretches out described blade root connecting cylinder (1) end face equals the distance that described long double threaded screw (2.2) stretches out described blade root connecting cylinder (1) end face.
6. the linkage structure of lengthening wind turbine blade root according to claim 5, the diameter that it is characterized in that described radial mounting hole (12) is D3, and the quantity of described axial mounting hole (11) is equal to or less than the integer value of 0.79 × π × (D1+D2)/2D3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520037315.3U CN204386815U (en) | 2015-01-20 | 2015-01-20 | Lengthen the linkage structure of wind turbine blade root |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520037315.3U CN204386815U (en) | 2015-01-20 | 2015-01-20 | Lengthen the linkage structure of wind turbine blade root |
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| Publication Number | Publication Date |
|---|---|
| CN204386815U true CN204386815U (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520037315.3U Active CN204386815U (en) | 2015-01-20 | 2015-01-20 | Lengthen the linkage structure of wind turbine blade root |
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| CN (1) | CN204386815U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564541A (en) * | 2015-01-20 | 2015-04-29 | 株洲时代新材料科技股份有限公司 | Connecting structure in root of lengthened wind power blade and mounting method of lengthened wind power blade |
| CN113137345A (en) * | 2021-04-30 | 2021-07-20 | 上海电气风电集团股份有限公司 | Blade and wind wheel of wind driven generator |
-
2015
- 2015-01-20 CN CN201520037315.3U patent/CN204386815U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564541A (en) * | 2015-01-20 | 2015-04-29 | 株洲时代新材料科技股份有限公司 | Connecting structure in root of lengthened wind power blade and mounting method of lengthened wind power blade |
| CN113137345A (en) * | 2021-04-30 | 2021-07-20 | 上海电气风电集团股份有限公司 | Blade and wind wheel of wind driven generator |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240111 Address after: 412007 Haitian Road, Tianyuan District, Zhuzhou, Hunan Province, No. 18 Patentee after: ZHUZHOU TIMES NEW MATERIAL TECHNOLOGY Co.,Ltd. Patentee after: National University of Defense Technology Address before: 412007 Haitian Road, Tianyuan District, Zhuzhou, Hunan Province, No. 18 Patentee before: ZHUZHOU TIMES NEW MATERIAL TECHNOLOGY Co.,Ltd. |