CN114909383A - Locking and anti-loosening device applied to wind tunnel test propeller model installation - Google Patents
Locking and anti-loosening device applied to wind tunnel test propeller model installation Download PDFInfo
- Publication number
- CN114909383A CN114909383A CN202210487883.8A CN202210487883A CN114909383A CN 114909383 A CN114909383 A CN 114909383A CN 202210487883 A CN202210487883 A CN 202210487883A CN 114909383 A CN114909383 A CN 114909383A
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- Prior art keywords
- locking
- clamping sleeve
- locking nut
- positioning clamping
- wind tunnel
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- 238000009434 installation Methods 0.000 title claims abstract description 24
- 238000012856 packing Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
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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
- F16B39/24—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by means of washers, spring washers, or resilient plates that lock against the object
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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
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a locking and anti-loosening device applied to installation of a wind tunnel test propeller model, and belongs to the technical field of wind tunnel test research. The problem of the screw fastener takes off because of having different degrees vibrations to lead to appearing in present wind tunnel test screw and rotor test is solved. Comprises a locking nut, a wedged lock ring gasket, a positioning clamping sleeve and a fastening screw. The locking nut can be directly connected and locked with the propeller mounting shaft through threads, the wedged lock ring washer is matched with the locking nut for use and prevents the bolt from loosening through clamping force rather than friction force, and the front end of the positioning clamping sleeve is matched with the propeller hub through a plurality of positioning keys and is fixedly connected with the locking nut through screws. The wedged lock ring washer and the positioning clamping sleeve can realize double anti-loosening of the locknut, and even if the wedged lock ring washer loses efficacy and becomes loose and rotates, the positioning clamping sleeve can still maintain the locking state of the propeller hub, so that the wedged lock ring washer and the positioning clamping sleeve have the advantage of double anti-loosening, and the safety of a wind tunnel propeller test is ensured.
Description
Technical Field
The invention belongs to the technical field of wind tunnel test research, and particularly relates to a locking and anti-loosening device applied to installation of a wind tunnel test propeller model.
Background
The propeller test is a wind tunnel test for researching the influence of propeller slipstream on the aerodynamic characteristics of an aircraft, a test object is generally a fixed-wing aircraft, the radial size of a propeller is usually not very large, and vibration to a certain degree exists in the test process, so that anti-loosening measures need to be taken for a propeller device.
The rotor wing test objects are generally helicopters and gyroplanes, the radial size of a propeller is usually larger, and the screw fasteners are more easily loosened due to severe vibration caused by rotor wing waving and alternating load in the test, so that the propeller hub and the propeller blade are separated, the driving device, the force measuring balance and related wind tunnel facilities are damaged, the test plan is delayed, and the like.
Aiming at the two wind tunnel tests, locking and looseness prevention of the propeller hub are an important measure for solving the problem of test safety, the looseness prevention mode of the existing threaded fastener mainly adopts the principle of friction force to prevent looseness, and the fact proves that the looseness prevention method in the prior art is not suitable for locking and looseness prevention of the propeller hub in occasions with large dynamic load and vibration.
Disclosure of Invention
Based on the defects, the invention aims to provide the locking and anti-loosening device applied to the installation of the wind tunnel test propeller model, and solves the problem that the propeller hub cannot be locked and anti-loosened in the wind tunnel test.
The technical scheme adopted by the invention is as follows: a locking and anti-loosening device applied to installation of a wind tunnel test propeller model comprises a locking nut, a wedged locking ring gasket group, a positioning clamping sleeve and a fastening screw, wherein a propeller assembly is installed on an installation shaft, the wedged lock ring gasket group is sleeved on the mounting shaft, the inner side of the wedged lock ring gasket group is attached to the inner hole mounting surface of the propeller component, the locking nut is tightly connected with the mounting shaft thread, the end surface of the inner side of the locking nut is attached to the outer side of the wedged locking ring gasket group, the positioning clamping sleeve is sleeved on the locking nut, a key positioned at one end of the positioning clamping sleeve is arranged in a key groove on the propeller component, and a plurality of groups of waist holes are uniformly distributed on the end surface of the other end of the positioning clamping sleeve, two fastening screws are arranged on each group of waist holes, and each fastening screw penetrates through the waist hole to be fastened and connected with the end surface of the outer side of the locking nut. The wedged lock ring washer group and the positioning clamping sleeve can realize double anti-loosening of the locknut; even if the locking nut loosens and rotates due to the failure of the wedged locking ring washer set, the positioning cutting sleeve can still maintain the locking state of the hub.
Furthermore, three groups of keys are uniformly distributed at one end of the positioning clamping sleeve, so that the positioning clamping sleeve and the propeller hub are circumferentially positioned into a whole.
Furthermore, four groups of waist holes are uniformly distributed on the end face of the other end of the positioning clamping sleeve and correspond to the eight threaded holes in the end face of the outer side of the locking nut.
The invention has the beneficial effects that: the invention realizes the locking and the anti-loosening of the propeller hub, can effectively maintain the locking state of the propeller hub even if being applied to occasions with larger dynamic load and vibration, has the advantage of double anti-loosening, avoids the loss of wind tunnel facilities caused by the situation that the propeller hub and the propeller blades are separated, and improves the safety of a wind tunnel propeller (rotor wing) test.
Drawings
FIG. 1 is a structural schematic diagram of the installation of a locking and anti-loosening device applied to the installation of a wind tunnel test propeller model according to the invention;
FIG. 2 is a schematic structural view of a positioning sleeve chuck outer end face direction waist-shaped hole;
FIG. 3 is a schematic diagram showing the positional relationship between the locking nut and the positioning sleeve when the locking nut is loosened and rotated by a certain angle;
FIG. 4 is a schematic view of the overall mounting structure of the rotor assembly;
FIG. 5 is a schematic view of the wedged check ring washer set installed from the front end of the mounting shaft;
FIG. 6 is a schematic view of the structure of the reverse force applying rod when the locking nut is installed;
FIG. 7 is a schematic structural view when the positioning card sleeve is installed;
in the figure, 1-blade, 2-hub, 3-lock nut, 4-positioning cutting sleeve, 5-wedging type lock ring gasket group, 6-installation shaft, 7-reverse force application rod, 8-positioning gasket, 9-nut and 10-fastening screw.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the locking and anti-loosening device applied to installation of a wind tunnel test propeller model comprises a locking nut 3, a wedged locking ring gasket set 5, a positioning clamping sleeve 4 and eight fastening screws 10, wherein a propeller assembly is installed on an installation shaft 6, the wedged locking ring gasket set 5 is sleeved on the installation shaft 6, the inner side of the wedged locking ring gasket set 5 is attached to an inner hole installation surface of the propeller assembly, the locking nut 3 is in threaded fastening connection with the installation shaft 6, and the locking nut can be directly connected with the installation shaft of the propeller through threads and locked. The pretightening force that lock nut produced at the fastening in-process can produce axial thrust to the propeller rotor subassembly, exists always under the condition of not loosening, realizes the axial positioning and the locking of propeller rotor subassembly.
The end surface of the inner side of the locking nut 3 is attached to the outer side of the wedged lock ring gasket set 5. The wedged lock ring gasket group is matched with a lock nut for use, the gasket is suitable for being used under the working conditions of large dynamic load and vibration, the bolt is prevented from loosening in a clamping force rather than a friction force mode, the inner surface of the gasket is wedge-shaped, the outer surface of the gasket is radial sawteeth, the radial sawteeth are meshed with the surface of a workpiece contacted with the radial sawteeth when the bolt is screwed, when the workpiece is subjected to large load and vibration, displacement only can occur between the wedge-shaped inner surfaces of the gasket, the bolt is effectively self-locked by the displacement between the wedge-shaped inner surfaces, and the clamping force is increased.
The positioning clamping sleeve 4 is sleeved on the locking nut 3, three groups of keys uniformly distributed at one end of the positioning clamping sleeve 4 are arranged in three corresponding key grooves on the propeller component, four groups of waist holes are uniformly distributed at the other end face of the positioning clamping sleeve 4, two fastening screws 10 are arranged on each waist hole, and each fastening screw 10 penetrates through each waist hole to be fastened and connected with the end face of the outer side of the locking nut 3.
The wedged lock ring washer group and the positioning clamping sleeve can realize double anti-loosening of the locknut; even if the locking nut loosens and rotates due to the failure of the wedged locking ring washer set, the positioning cutting sleeve can still maintain the locking state of the hub.
When the positioning clamping sleeve is fixedly connected with the locking nut through the screw, at least four threaded holes are available on the locking nut due to different thread clearances and pretightening forces.
Example 2
When a propeller (rotor wing) assembly is prepared for a test or is re-installed after the blade angle is adjusted every time, a locking and anti-loosening device needs to be installed, and the installation process mainly comprises the following steps:
the method comprises the following steps: as shown in fig. 4, the propeller (rotor) assembly is integrally mounted to the mounting shaft 6;
step two: as shown in fig. 5, the wedged lock ring washer set 5 is loaded from the front end of the mounting shaft 6;
step three: as shown in fig. 6, the reverse force applying rod 7 is tightened, the lock nut 3 is mounted after the lock washer 8 is tightened against the hub and tightened by the nut 9. The step needs at least two persons to operate, wherein one person screws the locking nut 3, the other person is matched with the reverse stress application rod 7, and the locking nut 3 needs to be fastened by using a torque wrench;
step four: as shown in fig. 7, the alignment key slot is fitted into the positioning ferrule 4;
step five: and a fastening screw is arranged in a waist-shaped hole on the end surface of the outer side of the positioning clamping sleeve 4.
Due to strong vibration and the like, the locknut is loosened, due to the effects of the positioning clamping sleeve and the fastening screw, taking the existing structure as an example, as shown in fig. 3, the locknut can rotate about 40 degrees at most, the thread of the nut is fine-thread M20x1.5, the axial displacement is about 0.167mm by folding, and then due to the clamping of the screw, the locknut cannot be loosened any more, so that the function of secondary mechanical looseness prevention is realized.
Claims (4)
1. The utility model provides a be applied to locking anti loosening device of wind tunnel test screw model installation, includes lock nut (3), wedges formula lock ring packing ring group (5), positioning card cover (4) and fastening screw (10), the screw subassembly is installed on installation axle (6), its characterized in that: the wedged lock ring gasket set (5) is sleeved on an installation shaft (6), the inner side of the wedged lock ring gasket set (5) is attached to an inner hole installation surface of the propeller assembly, the locking nut (3) is in threaded fastening connection with the installation shaft (6), the inner side end surface of the locking nut (3) is attached to the outer side of the wedged lock ring gasket set (5), the positioning clamping sleeve (4) is sleeved on the locking nut (3), a key positioned at one end of the positioning clamping sleeve (4) is installed in a key groove in the propeller assembly, multiple groups of waist holes are uniformly distributed on the end surface of the other end of the positioning clamping sleeve (4), two fastening screws (10) are installed on each group of waist holes, and each fastening screw (10) penetrates through each waist hole to be fastened and connected with the outer end surface of the locking nut (3).
2. The locking and anti-loosening device applied to wind tunnel test propeller model installation according to claim 1, is characterized in that: three groups of keys are uniformly distributed at one end of the positioning clamping sleeve (4).
3. The locking and anti-loosening device applied to wind tunnel test propeller model installation according to claim 1 or 2, is characterized in that: and four groups of waist holes are uniformly distributed on the end surface of the other end of the positioning clamping sleeve (4) and correspond to the eight threaded holes on the outer end surface of the locking nut (3).
4. The locking and anti-loosening device applied to wind tunnel test propeller model installation according to claim 3, is characterized in that: when the positioning clamping sleeve (4) is fixedly connected with the locking nut (3) through the fastening screw (10), due to the reasons of different thread gaps and pretightening forces, at least four threaded holes in the locking nut (3) can be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210487883.8A CN114909383A (en) | 2022-05-06 | 2022-05-06 | Locking and anti-loosening device applied to wind tunnel test propeller model installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210487883.8A CN114909383A (en) | 2022-05-06 | 2022-05-06 | Locking and anti-loosening device applied to wind tunnel test propeller model installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114909383A true CN114909383A (en) | 2022-08-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210487883.8A Pending CN114909383A (en) | 2022-05-06 | 2022-05-06 | Locking and anti-loosening device applied to wind tunnel test propeller model installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114909383A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB569817A (en) * | 1943-09-16 | 1945-06-11 | David Sydney Chubb | Screwthread locking devices |
| US20060188357A1 (en) * | 2005-02-18 | 2006-08-24 | Siemens Westinghouse Power Corp. | Nut cap and method of securing a nut on a bolt |
| JP2014114863A (en) * | 2012-12-10 | 2014-06-26 | Hino Motors Ltd | Nut rotation suppressing structure |
| US20150226252A1 (en) * | 2014-02-07 | 2015-08-13 | Bruce A. Bennett | Tamper-Proof Locking Fastener |
| CN109606645A (en) * | 2018-12-28 | 2019-04-12 | 成都纵横大鹏无人机科技有限公司 | Paddle blade structure and unmanned plane |
| CN212448047U (en) * | 2020-07-21 | 2021-02-02 | 北京远度互联科技有限公司 | Oar presss from both sides, screw subassembly, power device and unmanned aerial vehicle |
| CN213109756U (en) * | 2020-06-18 | 2021-05-04 | 苏州裕华活塞销厂 | Anti-loosening structure propeller shaft convenient to disassemble and assemble |
| CN213575091U (en) * | 2020-09-08 | 2021-06-29 | 苏州锐凯标准件有限公司 | Bolt with anti-loosening function |
-
2022
- 2022-05-06 CN CN202210487883.8A patent/CN114909383A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB569817A (en) * | 1943-09-16 | 1945-06-11 | David Sydney Chubb | Screwthread locking devices |
| US20060188357A1 (en) * | 2005-02-18 | 2006-08-24 | Siemens Westinghouse Power Corp. | Nut cap and method of securing a nut on a bolt |
| JP2014114863A (en) * | 2012-12-10 | 2014-06-26 | Hino Motors Ltd | Nut rotation suppressing structure |
| US20150226252A1 (en) * | 2014-02-07 | 2015-08-13 | Bruce A. Bennett | Tamper-Proof Locking Fastener |
| CN109606645A (en) * | 2018-12-28 | 2019-04-12 | 成都纵横大鹏无人机科技有限公司 | Paddle blade structure and unmanned plane |
| CN213109756U (en) * | 2020-06-18 | 2021-05-04 | 苏州裕华活塞销厂 | Anti-loosening structure propeller shaft convenient to disassemble and assemble |
| CN212448047U (en) * | 2020-07-21 | 2021-02-02 | 北京远度互联科技有限公司 | Oar presss from both sides, screw subassembly, power device and unmanned aerial vehicle |
| CN213575091U (en) * | 2020-09-08 | 2021-06-29 | 苏州锐凯标准件有限公司 | Bolt with anti-loosening function |
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