CN212202806U - Anti-loosening nut for hydropower station generator - Google Patents
Anti-loosening nut for hydropower station generator Download PDFInfo
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- CN212202806U CN212202806U CN202021034086.7U CN202021034086U CN212202806U CN 212202806 U CN212202806 U CN 212202806U CN 202021034086 U CN202021034086 U CN 202021034086U CN 212202806 U CN212202806 U CN 212202806U
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- fastening nut
- small cylinder
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- nut
- taper hole
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- 230000008602 contraction Effects 0.000 claims abstract description 14
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A looseness-proof nut for a hydropower station generator comprises a lower fastening nut and an upper fastening nut; the lower fastening nut is in a step shape and comprises a regular prism and a small cylinder positioned at the upper end of the regular prism, the regular prism is flush with the central line of the small cylinder, the centers of the regular prism and the small cylinder are provided with internal thread through holes for mounting bolts, and the periphery of the small cylinder is uniformly provided with more than two contraction joints to form a contraction structure consisting of more than two spring leaves; the middle part of the upper fastening nut is provided with a step through hole which comprises a small hole for mounting a bolt and a taper hole connected to the lower end of the small hole, the inner wall of the small hole is provided with an internal thread for matching the bolt, the inner diameter of the opening end of the lower part of the taper hole is larger than the inner diameter of the upper part of the taper hole, the inner diameter of the upper part of the taper hole is smaller than the outer diameter of the small cylinder in a natural; the lower fastening nut is matched with the bolt to fasten a part to be fastened, and the taper hole of the upper fastening nut is completely sleeved and pressed on the small cylinder of the lower fastening nut; and the looseness can be avoided under the working condition of frequent vibration.
Description
Technical Field
The utility model relates to a fastening nut, concretely relates to power station is locking nut for generator.
Background
At present, screw caps used on structural components of a generating set of a hydropower station are conventional screw caps of 8.8 grade and above, and a hydraulic generator can generate vibration during operation, so that a locking sheet or a spring washer needs to be added on the screw caps to prevent the screw caps from loosening, the locking sheet cannot be reused, the installation is complicated, the operation is difficult at a position with a narrow space, and the pre-tightening force of the screw caps cannot be locked; the spring washer is easy to break, and area of contact is little, can leave the slot on the equipment body, damages the equipment body, frequently just great position also can not hundredth loose-proof to the vibration, if the nut is not hard up takes place for the key position, very easily leads to the fact major accident to the water power station generating set.
Disclosure of Invention
An object of the utility model is to overcome the above-mentioned not enough of prior art and provide a power station is locking nut that moves for generator, concrete simple structure, easy operation can effectively prevent to become flexible after the fastening.
The technical solution is as follows: a looseness-proof nut for a hydropower station generator comprises a lower fastening nut and an upper fastening nut; the lower fastening nut is in a step shape and comprises a regular prism and a small cylinder positioned at the upper end of the regular prism, the regular prism is flush with the central line of the small cylinder, the centers of the regular prism and the small cylinder are provided with internal thread through holes for mounting bolts, and the periphery of the small cylinder is uniformly provided with more than two contraction joints to form a contraction structure consisting of more than two spring leaves; the middle part of the upper fastening nut is provided with a step through hole which comprises a small hole for mounting a bolt and a taper hole connected to the lower end of the small hole, the inner wall of the small hole is provided with an internal thread for matching the bolt, the inner diameter of the opening end of the lower part of the taper hole is larger than the inner diameter of the upper part of the taper hole, the inner diameter of the upper part of the taper hole is smaller than the outer diameter of the small cylinder in a natural; the lower fastening nut is matched with the bolt to fasten the element to be fastened, and the taper hole of the upper fastening nut is completely sleeved and pressed on the small cylinder of the lower fastening nut.
The taper value of the taper hole is 1: 30-1: 40.
The taper value of the taper hole is 1: 35.
The depth of the taper hole is 7 mm.
The height of the small cylinder is 6 mm.
The maximum shrinkage of the upper end of the small cylinder is 0.348 mm.
Four contraction joints are uniformly distributed on the periphery of the small cylinder to form a contraction structure consisting of four spring petals.
The regular prism is a regular hexagonal prism.
Has the advantages that: compared with the prior art the utility model discloses, simple structure, the operation of being convenient for, low cost is applicable to the fastening nut of power station generator and other engineering machine tool types, ensures not hard up under frequent vibration operating mode.
Drawings
FIG. 1 is a schematic structural view of the upper fastening nut of the present invention before fastening;
FIG. 2 is a schematic structural view of the upper fastening nut of the present invention after fastening;
FIG. 3 is a top view of the lower fastening nut of the present invention;
in the figure: 1. a lower fastening nut; 2. fastening a nut; 3. a bolt; 4. a machine member; 5. shrinking the seam; 6. and (4) taper holes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In fig. 1, 2 and 3, the utility model comprises a lower fastening nut 1 and an upper fastening nut 2, wherein the lower fastening nut 1 is in a step shape and comprises a regular prism and a small cylinder positioned at the upper end of the regular prism, the regular prism is parallel and level with the central line of the small cylinder, an internal thread through hole for installing a bolt 3 is arranged at the center of the regular prism and the small cylinder, four contraction joints 5 are uniformly distributed at the periphery of the small cylinder, and a contraction structure consisting of four spring petals is formed; the middle part of the upper fastening nut 2 is provided with a step through hole which comprises a small hole for mounting the bolt 3 and a taper hole 6 connected to the lower end of the small hole, the taper value of the taper hole 6 is 1: 30-1: 40, the inner wall of the small hole is provided with an internal thread for matching the bolt 3, the inner diameter of the opening end at the lower part of the taper hole 6 is larger than the inner diameter of the upper part of the taper hole, the inner diameter of the upper part of the taper hole 6 is smaller than the outer diameter of the small cylinder; the lower fastening nut 1 is matched with the bolt 3 to fasten the element 4 to be fastened, and the taper hole 6 of the upper fastening nut 2 is completely sleeved and pressed on the small cylinder of the lower fastening nut 1; further, the taper value of the taper hole 6 is 1:35, depth 7mm, small cylinder height 6 mm.
The operation process is as follows: the lower fastening nut 1 is screwed on the workpiece fastening bolt 3 and pressed to the pre-tightening force required by the workpiece, the upper fastening nut 2 is screwed on the upper end of the lower fastening nut 1 until the lower fastening nut 1 is attached, and the fastening work of the nut is finished at the moment, so that the nut can be prevented from loosening.
The principle is as follows: when the upper fastening nut is screwed 2 to be attached to the upper end of the lower fastening nut 1, the spring flaps contract, the contraction amount of the spring flaps is calculated according to the conicity value of 1:35 and the embedding amount of 6mm, the contraction amount of a single side is 1/35 multiplied by 6 ﹦ 0.174.174 mm, the two sides are 0.348mm, the threads on the inner side of the small cylinder are tightly meshed with the threads on the bolt, and the lower fastening nut 1 tightly embraces the bolt 3 under the combined action of axial force and radial force, so that the looseness is effectively prevented. Go up in fastening nut 2's the taper hole 6 along with fastening nut's the mutual extrusion in the small circle post outside down, and have four spring lamellas to increase the frictional quantity, guaranteed that go up fastening nut 2 can not reverse and not hard up, go up fastening nut 2's tightening action again, reach better locking effect of moving.
The above-described embodiments are merely preferred examples of the present invention and are not exhaustive of the possible implementations of the present invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a power station is locking nut that moves for generator which characterized in that: comprises a lower fastening nut (1) and an upper fastening nut (2); the lower fastening nut (1) is in a step shape and comprises a regular prism and a small cylinder positioned at the upper end of the regular prism, the regular prism is flush with the central line of the small cylinder, the centers of the regular prism and the small cylinder are provided with internal thread through holes for installing bolts (3), more than two contraction joints (5) are uniformly distributed on the periphery of the small cylinder, and more than two spring flaps are formed to form a contraction structure; the middle part of the upper fastening nut (2) is provided with a step through hole which comprises a small hole for mounting the bolt (3) and a taper hole (6) connected to the lower end of the small hole, the inner wall of the small hole is provided with an internal thread for matching the bolt (3), the inner diameter of the lower opening end of the taper hole (6) is larger than the inner diameter of the upper part of the taper hole, the inner diameter of the upper part of the taper hole (6) is smaller than the outer diameter of the small cylinder in a natural state, and; the lower fastening nut (1) is matched with the bolt (3) to fasten the element (4) to be fastened, and the taper hole (6) of the upper fastening nut (2) is completely sleeved and pressed on the small cylinder of the lower fastening nut (1).
2. The anti-loosening nut for the generator of the hydropower station as claimed in claim 1, wherein: the taper value of the taper hole (6) is 1: 30-1: 40.
3. The anti-loosening nut for the generator of the hydropower station as claimed in claim 2, wherein: the taper value of the taper hole (6) is 1: 35.
4. The anti-loosening nut for the generator of the hydropower station as claimed in claim 3, wherein: the depth of the taper hole (6) is 7 mm.
5. The anti-loosening nut for the generator of the hydropower station as claimed in claim 4, wherein: the height of the small cylinder is 6 mm.
6. The anti-loosening nut for the generator of the hydropower station as claimed in claim 5, wherein: the maximum shrinkage of the upper end of the small cylinder is 0.348 mm.
7. The anti-loosening nut for the generator of the hydropower station as claimed in claim 1, wherein: four contraction joints (5) are uniformly distributed on the periphery of the small cylinder to form a contraction structure consisting of four spring petals.
8. The anti-loosening nut for the generator of the hydropower station as claimed in claim 1, wherein: the regular prism is a regular hexagonal prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021034086.7U CN212202806U (en) | 2020-06-08 | 2020-06-08 | Anti-loosening nut for hydropower station generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021034086.7U CN212202806U (en) | 2020-06-08 | 2020-06-08 | Anti-loosening nut for hydropower station generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212202806U true CN212202806U (en) | 2020-12-22 |
Family
ID=73808195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021034086.7U Active CN212202806U (en) | 2020-06-08 | 2020-06-08 | Anti-loosening nut for hydropower station generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212202806U (en) |
-
2020
- 2020-06-08 CN CN202021034086.7U patent/CN212202806U/en active Active
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