CN113374774A - Anti-loosening fixing device for connecting bolt of wind motor - Google Patents
Anti-loosening fixing device for connecting bolt of wind motor Download PDFInfo
- Publication number
- CN113374774A CN113374774A CN202110570759.3A CN202110570759A CN113374774A CN 113374774 A CN113374774 A CN 113374774A CN 202110570759 A CN202110570759 A CN 202110570759A CN 113374774 A CN113374774 A CN 113374774A
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- China
- Prior art keywords
- nut
- locking
- connecting bolt
- connecting plate
- locking nut
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000009434 installation Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
- F16B39/284—Locking by means of elastic deformation
- F16B39/286—Locking by means of elastic deformation caused by saw cuts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a wind motor connecting bolt anti-loosening fixing device which is arranged on a connecting bolt of a wind motor and comprises a basic nut, a locking nut, a fixing nut and a connecting plate, wherein the basic nut, the locking nut and the fixing nut are sequentially attached to the connecting bolt from bottom to top through threads, the outer diameter of the fixing nut is larger than that of the locking nut, the connecting plate is provided with a locking hole matched with the shape of the locking nut, the connecting plate is nested outside the locking nut through the locking hole, the locking nut does not rotate relative to the connecting plate, and two or more locking nuts are embedded in the connecting plate. The locking nut and the connecting plate are interlocked, and the locking nut is fixed by utilizing the characteristic that the rotation centers of the locking nuts are not coincident, so that the effect of preventing the connecting bolt from loosening is achieved; the installation is convenient, and the practicality is strong, has guaranteed wind turbine generator system's normal steady operation, has improved connecting bolt's life simultaneously.
Description
Technical Field
The invention belongs to the technical field of wind power devices, and relates to a wind power motor connecting bolt anti-loosening fixing device.
Background
With the rapid development of energy sources, the occupation rate of renewable energy sources in the world energy resource proportion is larger and larger. Wind power has attracted more and more attention due to its advantages of clean use, abundant wind resources, low cost, flexible installation scale, etc. The wind motor equipment bears a large wind load, so that the safe and stable operation of the wind motor can not leave the safety and reliability of the components.
The connecting bolts between the hub and the blades of the wind motor and the connecting bolts between the tower barrels of the wind motor are used as important connecting parts of the wind motor, and the safe operation of the whole wind motor is directly influenced. The bolt is under the action of alternating load for a long time and the wind turbine is easy to loosen due to long-term structural vibration, so that the stress variation range of the bolt is enlarged, and the bolt is easy to generate fatigue fracture under the condition, so that the effect of preventing the loosening of the connecting bolt has very important significance for the safe operation of the wind turbine.
Disclosure of Invention
The invention aims to provide a wind motor connecting bolt anti-loosening fixing device which prevents a connecting bolt from loosening by locking a locking nut.
The invention adopts the technical scheme that the anti-loosening fixing device for the connecting bolt of the wind turbine is arranged on the connecting bolt of the wind turbine and comprises a basic nut, a locking nut, a fixing nut and a connecting plate, wherein the basic nut, the locking nut and the fixing nut are sequentially attached to the connecting bolt from bottom to top through threads, the outer diameter of the fixing nut is larger than that of the locking nut, the connecting plate is provided with a locking hole matched with the shape of the locking nut, the connecting plate is nested outside the locking nut through the locking hole, the locking nut does not rotate relative to the connecting plate, and two or more than two locking nuts are embedded in the connecting plate.
The present invention is also characterized in that,
the outer circumferential surface of the locking nut is provided with sawteeth which are uniformly arranged.
The number of the saw teeth of the locking nut is more than 15.
The rotation directions of the internal threads of the fixing nut and the basic nut are consistent.
The number of the fixing nuts is one or more than one.
The invention has the beneficial effects that:
the anti-loosening fixing device for the connecting bolt of the wind motor is simple in structure and convenient to use; by arranging the interlocking locking nuts and the connecting plates, the locking nuts are fixed by utilizing the characteristic that the rotation centers of the locking nuts are not coincident, so that the effect of preventing the connecting bolts from loosening is achieved; the installation is convenient, and the practicality is strong, has guaranteed wind turbine generator system's normal steady operation, has improved connecting bolt's life simultaneously.
Drawings
FIG. 1 is a schematic structural view of a wind turbine connecting bolt anti-loosening fixing device of the invention;
FIG. 2 is a schematic structural diagram of a connecting plate of the anti-loosening fixing device for the connecting bolt of the wind turbine;
fig. 3 is a schematic structural diagram of a locking nut of the anti-loosening fixing device for the connecting bolt of the wind turbine.
In the figure, 1 is a connecting bolt, 2 is a base nut, 3 is a locking nut, 4 is a connecting plate, 5 is a fixing nut, and 6 is a locking hole.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a wind motor connecting bolt anti-loosening fixing device which is arranged on a connecting bolt 1 of a wind motor and comprises a base nut 2, a locking nut 3, a fixing nut 5 and a connecting plate 4 as shown in figure 1, wherein the base nut 2, the locking nut 3 and the fixing nut 5 are sequentially attached to the connecting bolt 1 from bottom to top through threads, sawteeth are arranged on the outer circumferential surface of the locking nut 3, a locking hole 6 which is adaptive to the shape of the locking nut 3 is formed in the connecting plate 4 as shown in figure 2, the connecting plate 4 is embedded outside the locking nut 3 through the locking hole 6, the locking nut 3 does not rotate relative to the connecting plate 4, and two or more locking nuts 3 are embedded in the connecting plate 4.
As shown in fig. 3, the outer circumferential surface of the lock nut 3 is provided with saw teeth, the saw teeth of the lock nut 3 are uniformly arranged, the number of the saw teeth of the lock nut 3 is more than 15, the number of the saw teeth of the lock nut 3 is the same as that of the lock hole 6, the saw teeth of the lock nut 3 can be replaced by other structures, and the lock nut 3 is embedded into the connecting plate 4 without relative movement.
The internal thread rotation direction of the fixing nut 5 is consistent with that of the base nut 2, the outer diameter of the fixing nut 5 is larger than that of the locking nut 3, so that the connecting plate 4 is prevented from being separated from the locking nut 3 in the vertical direction, and the number of the fixing nuts 5 is one or more than one because the connecting plate 4 is hardly acted in the vertical direction, and the fixing nut is not required to be fully arranged.
The invention discloses a wind motor connecting bolt anti-loosening fixing device, which mainly comprises the following components:
the base nut 2 serves as a basic fastening for the connecting bolt 1.
The locking nut 3 is inlaid in the locking hole 6 of the connecting plate 4, so that the locking nut 3 and the connecting plate 4 are jointly interlocked, even if the basic nut 2 cannot completely fasten the connecting bolt 1 in work, the connecting bolt 1 cannot be loosened, and the thickness of the locking nut 3 is determined according to the reserved space at the top of the connecting bolt 1 in an actual field.
The gap between the saw teeth of the locking nut 3 and the saw teeth of the connecting plate 4 can be adjusted, and the gap adjusting range is 0-3mm according to different sizes and different sizes of the saw teeth of the connecting bolt 1, so that the problem of deviation existing in the design drawing and the field actual installation can be solved conveniently.
Fixing nut 5 makes connecting plate 4 press from both sides between fixing nut 5 and basic nut 2, avoids connecting plate 4 not hard up, and fixing nut 5 can obtain with the cutting of standard part nut, also can do by level, and fixing nut 5's thickness is decided according to actual on-the-spot bolt top headspace.
The use and working principle of the anti-loosening fixing device for the connecting bolt of the wind motor are as follows:
after basic nut 2 is fixed, screw up locking nut 3 to the position with 2 upper surface in close contact with of basic nut, locking nut 3 inlays in locking hole 6 of connecting plate 4, interlock each locking nut 3, last through 5 fixed connection boards of fixed nut 4 can, connecting plate 4 quantity can be selected in a flexible way, the transportation of being more convenient for, installation and dismantlement, utilize the characteristics that 3 centers of rotation of each locking nut do not coincide to realize locking nut 3's immovable, thereby reach the effect that prevents connecting bolt 1 not hard up.
The outer ring of lock nut has a plurality of sawtooth, because lock nut 3 and basic nut 2 in close contact with, the sawtooth can not correspond completely with the locking hole 6 of connecting plate 4 completely, so need finely tune lock nut 3, will cause certain error to connecting bolt 1 pretightning force like this, can design sawtooth quantity according to the requirement of pretightning force amplitude of change and the numerical value of bolt pitch to in satisfying the required precision. By taking the connecting bolt 1 with the common pretightening force of 400KN, the specification of M36 × 4 and the length of l 485mm as an example, if the pretightening force lost by micro loosening of the connecting bolt 1 is within 5%, each locking nut 3 needs at least 45 saw teeth, and the calculation process is as follows: 5% of the 400KN pretension loss is 20KN, corresponding to the stress lost by the connecting bolt 1
Connecting bolt 1 strain
Wherein E is 210Gpa, and the shortening of the connecting bolt 1
Base nut 2 loose angle
Wherein p represents a thread pitch of 4mm, the pre-tightening force change requirement can be met within 4.086 degrees of dislocation of the sawtooth hole and the sawtooth nut, and the dislocation of the sawtooth hole of the lock nut 3 and the sawtooth hole of the connecting plate 4 can be an adjacent previous tooth or an adjacent next tooth, so that the included angle between each tooth of the sawtooth hole and the lock nut 3 is within 8.172 degrees, and the corresponding number of the sawteeth is not equalLess than that of
I.e. at least 45 teeth per toothed nut.
Claims (5)
1. A wind motor connecting bolt anti-loosening fixing device is arranged on a connecting bolt (1) of a wind motor, it is characterized by comprising a basic nut (2), a locking nut (3), a fixing nut (5) and a connecting plate (4), the basic nut (2), the locking nut (3) and the fixing nut (5) are sequentially attached to the connecting bolt (1) from bottom to top through threads, the outer diameter of the fixing nut (5) is larger than that of the locking nut (3), the connecting plate (4) is provided with a locking hole (6) which is matched with the locking nut (3) in shape, the connecting plate (4) is nested outside the locking nut (3) through the locking hole (6), the locking nut (3) does not rotate relative to the connecting plate (4), and two or more locking nuts (3) are embedded on the connecting plate (4).
2. The anti-loosening fixing device for the connecting bolt of the wind motor as claimed in claim 1, wherein the outer circumferential surface of the locking nut (3) is provided with saw teeth, and the saw teeth of the locking nut (3) are uniformly arranged.
3. The anti-loosening fixing device for the connecting bolt of the wind motor as claimed in claim 2, wherein the number of the saw teeth of the locking nut (3) is more than 15.
4. The anti-loosening fixing device for the connecting bolt of the wind turbine as claimed in claim 1, wherein the fixing nut (5) and the base nut (2) have the same internal thread rotation direction.
5. The anti-loosening fixing device for the connecting bolt of the wind motor as claimed in claim 1, wherein the number of the fixing nuts (5) is one or more than one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110570759.3A CN113374774A (en) | 2021-05-25 | 2021-05-25 | Anti-loosening fixing device for connecting bolt of wind motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110570759.3A CN113374774A (en) | 2021-05-25 | 2021-05-25 | Anti-loosening fixing device for connecting bolt of wind motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113374774A true CN113374774A (en) | 2021-09-10 |
Family
ID=77571864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110570759.3A Pending CN113374774A (en) | 2021-05-25 | 2021-05-25 | Anti-loosening fixing device for connecting bolt of wind motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113374774A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202140404U (en) * | 2011-05-19 | 2012-02-08 | 陈献友 | Anti-loose nut and bolt assembly |
| CN202768603U (en) * | 2012-05-03 | 2013-03-06 | 郑重胜 | Locking sheet for tower drum connecting bolt of wind turbine |
| CN104215141A (en) * | 2014-08-08 | 2014-12-17 | 安徽昱工耐磨材料科技有限公司 | Feeding plate inspection device |
| CN204736656U (en) * | 2015-06-09 | 2015-11-04 | 郑州精益达汽车零部件有限公司 | Axle hub bearing adjustment locking structure |
| CN105697243A (en) * | 2016-04-20 | 2016-06-22 | 王文玉 | Maintenance-free connecting device and method for large wind driven generator tower |
| CN110733529A (en) * | 2019-11-06 | 2020-01-31 | 中车大连机车车辆有限公司 | Angle adjusting device and locomotive end connecting pipe fixing dust remover comprising same |
-
2021
- 2021-05-25 CN CN202110570759.3A patent/CN113374774A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202140404U (en) * | 2011-05-19 | 2012-02-08 | 陈献友 | Anti-loose nut and bolt assembly |
| CN202768603U (en) * | 2012-05-03 | 2013-03-06 | 郑重胜 | Locking sheet for tower drum connecting bolt of wind turbine |
| CN104215141A (en) * | 2014-08-08 | 2014-12-17 | 安徽昱工耐磨材料科技有限公司 | Feeding plate inspection device |
| CN204736656U (en) * | 2015-06-09 | 2015-11-04 | 郑州精益达汽车零部件有限公司 | Axle hub bearing adjustment locking structure |
| CN105697243A (en) * | 2016-04-20 | 2016-06-22 | 王文玉 | Maintenance-free connecting device and method for large wind driven generator tower |
| CN110733529A (en) * | 2019-11-06 | 2020-01-31 | 中车大连机车车辆有限公司 | Angle adjusting device and locomotive end connecting pipe fixing dust remover comprising same |
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