CN202707382U - Connecting structure of fan blade and variable-pitch bearing - Google Patents
Connecting structure of fan blade and variable-pitch bearing Download PDFInfo
- Publication number
- CN202707382U CN202707382U CN2012203498392U CN201220349839U CN202707382U CN 202707382 U CN202707382 U CN 202707382U CN 2012203498392 U CN2012203498392 U CN 2012203498392U CN 201220349839 U CN201220349839 U CN 201220349839U CN 202707382 U CN202707382 U CN 202707382U
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- China
- Prior art keywords
- fan blade
- hole
- pitch variable
- blade
- variable bearings
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- Expired - Lifetime
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a connecting structure of a fan blade and a variable-pitch bearing. The connecting structure comprises the fan blade and the variable-pitch bearing, a flange gasket is arranged between the fan blade and the variable-pitch bearing, long screw holes and short screw holes are arranged on the end face of the root of the fan blade at intervals, two circles of nut holes are arranged on the side surface of the root of the fan blade along the peripheral direction of the blade, nuts are arranged in the nut holes, the nuts located in the inner circle of nut holes are matched and fastened with short screws, and the nuts located in the outer circle of the nut holes are matched and fastened with long screws. The long screws and the short screws are installed on the end face of the root of the fan blade at intervals. The fan blade, the flange gasket and the variable-pitch bearing are fixedly connected together. The connecting structure meets safety requirements of various working conditions, simultaneously protects the end face of the fan blade, improves strength and anti-fatigue performance of the blade and bolts, and effectively improves stress distribution of a glass reinforced plastic blade.
Description
Technical field
The utility model relates to the linkage structure of fan blade, particularly the linkage structure of a kind of fan blade and pitch variable bearings.
Background technique
As everyone knows, the attachment portion that is connected to blower fan of blade and pitch variable bearings plays vital effect, therefore require the root of blade that enough intensity is arranged, and the bolt of blade should possess good mechanical property, such as enough intensity, rigidity, fatigue resistance and corrosion resistance etc.Blade is starched the traditional Placement of bearing into stamping bolt hole by the end face at root of blade with change, nut bore is beaten in side at root of blade, be fixed on the pitch variable bearings by the end of bolt with blade, and and increase the corrosion resistance of blade bolt by reinforcement inside and outside the glass fibre.Along with developing rapidly of wind-powered electricity generation industry, the blade of large MW class arises at the historic moment, and along with the increase of blade profile, the blade Placement traditional with becoming the slurry bearing significantly can not satisfy blade with become the slurry bearing in the joint to intensity, rigidity, the erosion-resisting performance requirement of fatigue resistance level.
Summary of the invention
Technical problem to be solved in the utility model is for the deficiencies in the prior art, provides a kind of reasonable in design, easy to use, effectively improves the fan blade of stress distribution of blade and the linkage structure of pitch variable bearings.
Technical problem to be solved in the utility model is to realize by following technological scheme, the linkage structure of fan blade and pitch variable bearings, comprise fan blade and pitch variable bearings, be characterized in: be provided with flange gasket between fan blade and the pitch variable bearings, the end face of fan blade root is provided with long bolt hole and short screw hole, described long bolt hole and short screw span arrange, be respectively equipped with the installation through hole with long bolt hole and short screw hole corresponding matching on flange gasket and the pitch variable bearings, with long bolt and short screw by through hole is installed, long bolt hole and short screw hole are with fan blade, flange gasket and pitch variable bearings are fixed; Be provided with two ring nut holes along the blade circumferencial direction on the side of fan blade root, be provided with nut in the described nut bore, be in nut in the nut bore of inner ring and cooperate fasteningly with short screw, the interior nut of nut bore that is in the outer ring cooperates fastening with external screw rod.
Technical problem to be solved in the utility model can also further realize by following technological scheme, the large 1.5mm-3mm of radius of the radius ratio fan blade root of described flange gasket.
Technical problem to be solved in the utility model can also further realize by following technological scheme, the even interval setting of described long bolt hole and short screw hole.
Technical problem to be solved in the utility model can also further realize by following technological scheme, and the position of opening in described long bolt hole and short screw hole is avoided fan blade matched moulds section.
Compared with prior art; the utility model is by adopting long bolt and short screw interval to be installed on the root end face of fan blade; fan blade, flange gasket and pitch variable bearings are fixed together; this linkage structure satisfies the security requirement under the various operating modes; protected simultaneously the end face of fan blade; improve intensity and the anti-fatigue performance of blade and bolt, and solved the narrow limitation of traditional Placement, effectively improved the stress distribution of fiberglass blade.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Referring to accompanying drawing, further describe concrete technological scheme of the present utility model, so that those skilled in the art understands the utility model further, and do not consist of its Copyright law.
Embodiment 1, with reference to accompanying drawing, the linkage structure of fan blade and pitch variable bearings, comprise fan blade 1 and pitch variable bearings 3, be provided with flange gasket 4 between fan blade 1 and the pitch variable bearings 3, the end face of fan blade 1 root is provided with long bolt hole 5 and short screw hole 2, described long bolt hole 5 and 2 intervals, short screw hole arrange, be respectively equipped with the installation through hole with long bolt hole 5 and short screw hole 2 corresponding matching on flange gasket 4 and the pitch variable bearings 3, with long bolt and short screw by through hole is installed, long bolt hole 5 and short screw hole 2 are with fan blade 1, flange gasket 4 and pitch variable bearings 3 are fixing; On the side of fan blade 1 root, be provided with two ring nut holes 6 along the blade circumferencial direction, be provided with nut in the described nut bore 6, be in nuts in the nut bore 6 of inner ring and cooperate fasteningly with short screw, the nut bore 6 interior nuts that are in the outer ring cooperate fastening with external screw rod.
During making, (1) revises the end face of the fiberglass blower fan blade 1 of moulding first smooth, uses high precision apparatus that the blade end facing cut is smooth, is to guarantee precision, uses the grinding flatness to be max:0.2 mm, the drilling precision of setting accuracy+/-0.005 °.Grind the smooth entire length of measuring blade afterwards, guarantee that the length of blade is physical length;
(2) the support attitude of each position of measurement blade guarantees that blade punching attitude is correct;
(3) calculate and drawing requirement according to theory, beat long bolt hole 5 and short screw hole 2 at the end face of fan blade 1, make a call to two ring nut holes 6 in the side of fan blade 1 root; Starter hole and the hole, end of the matched moulds section upside of fan blade 1 end are long bolt hole 5; Starter hole and the hole, end of the matched moulds subordinate side of fan blade 1 end are long bolt hole 5.
(4) nut is placed in the nut bore 6, long bolt and short screw are installed in the long bolt hole 5 that arranges at the interval simultaneously and short screw hole 2, guarantee that the exterior edge face of screw rod is on same horizontal plane, and coat screw thread fastening glue in direction towards blade of screw rod, cooperate fastening to guarantee screw rod with nut in the nut bore 6;
(5) after screw rod is first-class, the installation through hole of flange gasket 4, pitch variable bearings 3 is enclosed within on the screw rod, connects with outer nut locking at last.
Embodiment 2; in the linkage structure of embodiment's 1 described fan blade and pitch variable bearings; the large 1.5mm-3mm of radius of radius ratio fan blade 1 root of described flange gasket 4; in service to guarantee at wind field; the glass fiber reinforced plastics end faces of fan blade 1 is not damaged by pressure by pitch variable bearings 3 end faces, plays a protective role.
Embodiment 3, and in the linkage structure of embodiment's 1 described fan blade and pitch variable bearings, described long bolt hole 5 and 2 even intervals, short screw hole arrange, and make stress distribution even.
Embodiment 4, and in the linkage structure of embodiment's 1 described fan blade and pitch variable bearings, the position of opening in described long bolt hole 5 and short screw hole 2 is avoided fan blade 1 matched moulds section, in order to avoid blade strength is caused harmful effect.
Claims (4)
1. the linkage structure of a fan blade and pitch variable bearings, comprise fan blade and pitch variable bearings, it is characterized in that: be provided with flange gasket between fan blade and the pitch variable bearings, the end face of fan blade root is provided with long bolt hole and short screw hole, described long bolt hole and short screw span arrange, be respectively equipped with the installation through hole with long bolt hole and short screw hole corresponding matching on flange gasket and the pitch variable bearings, fan blade, flange gasket and pitch variable bearings fixed by through hole, long bolt hole and short screw hole are installed with long bolt and short screw; Be provided with two ring nut holes along the blade circumferencial direction on the side of fan blade root, be provided with nut in the described nut bore, be in nut in the nut bore of inner ring and cooperate fasteningly with short screw, the interior nut of nut bore that is in the outer ring cooperates fastening with external screw rod.
2. the linkage structure of fan blade according to claim 1 and pitch variable bearings is characterized in that: the large 1.5mm-3mm of radius of the radius ratio fan blade root of described flange gasket.
3. the linkage structure of fan blade according to claim 1 and pitch variable bearings is characterized in that: the even interval setting of described long bolt hole and short screw hole.
4. the linkage structure of fan blade according to claim 1 and pitch variable bearings, it is characterized in that: the position of opening in described long bolt hole and short screw hole is avoided fan blade matched moulds section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203498392U CN202707382U (en) | 2012-07-19 | 2012-07-19 | Connecting structure of fan blade and variable-pitch bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203498392U CN202707382U (en) | 2012-07-19 | 2012-07-19 | Connecting structure of fan blade and variable-pitch bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707382U true CN202707382U (en) | 2013-01-30 |
Family
ID=47587690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203498392U Expired - Lifetime CN202707382U (en) | 2012-07-19 | 2012-07-19 | Connecting structure of fan blade and variable-pitch bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707382U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748246A (en) * | 2012-07-19 | 2012-10-24 | 国电联合动力技术(连云港)有限公司 | Connecting structure of fan blade and variable propeller bearing |
| CN103334886A (en) * | 2013-07-10 | 2013-10-02 | 洛阳双瑞风电叶片有限公司 | Method of plugging nut hole of wind power blade root connecting system |
-
2012
- 2012-07-19 CN CN2012203498392U patent/CN202707382U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748246A (en) * | 2012-07-19 | 2012-10-24 | 国电联合动力技术(连云港)有限公司 | Connecting structure of fan blade and variable propeller bearing |
| CN103334886A (en) * | 2013-07-10 | 2013-10-02 | 洛阳双瑞风电叶片有限公司 | Method of plugging nut hole of wind power blade root connecting system |
| CN103334886B (en) * | 2013-07-10 | 2015-06-17 | 洛阳双瑞风电叶片有限公司 | Method of plugging nut hole of wind power blade root connecting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |
|
| CX01 | Expiry of patent term |