CN110589025A - Rotor transition shaft fixing device - Google Patents
Rotor transition shaft fixing device Download PDFInfo
- Publication number
- CN110589025A CN110589025A CN201910947909.0A CN201910947909A CN110589025A CN 110589025 A CN110589025 A CN 110589025A CN 201910947909 A CN201910947909 A CN 201910947909A CN 110589025 A CN110589025 A CN 110589025A
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- CN
- China
- Prior art keywords
- plate
- boss
- transition shaft
- nut
- transition
- Prior art date
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Transportation (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a rotor wing transition shaft fixing device which comprises a platform bottom plate [1], a mounting plate [2] and a transition shaft [4], wherein the centers of the platform bottom plate [1] and the mounting plate [2] are coaxially provided with holes, the diameter of a central hole of the platform bottom plate [1] is larger than that of the central hole of the mounting plate [2], the mounting plate [2] is fixedly connected onto the platform bottom plate [1], the bottom of the transition shaft [4] is provided with a boss, the boss penetrates through the central hole of the mounting plate [2], a step surface falls onto and is fixedly connected onto the mounting plate [2], the outer ring of the boss is provided with an external thread, the bottom end of the boss is provided with a cross open slot, and the bottom of the transition shaft [4] is sequentially subjected to limiting and locking through a large washer [6], a large nut [7], a. The device of the invention adopts multiple connection fixing, limiting and locking to stably fix the transition shaft on the central bottom plate platform, thereby solving the problem that the connection bolt of the transition shaft is often broken in the fatigue test process of the central part.
Description
Technical Field
The invention belongs to a fatigue test technology for a central part of a main rotor of a helicopter, and relates to a rotor wing transition shaft fixing device.
Background
A fatigue test of a helicopter main hub central part is an important ground strength simulation test, and in the test process, loads borne by the central part comprise centrifugal force, oscillation force, waving force and damper force, and are large and complex in working condition. The central part is connected with the rotor simulation shaft and the platform bottom plate through the rotor transition shaft; the transition shaft is positioned at the bottom of the loaded center and bears bending moment, torque and shearing force, and the load is the most severe. In the design of the traditional center part fatigue test bed, a transition shaft and a bottom plate are connected and fixed through dozens of bolts, but the size and the number of the connecting bolts are limited due to the limitation of space and a test loading arrangement mode. Therefore, in the actual fatigue test, the connecting bolt is often broken. Because one end of the connecting bolt is fixed on the lower surface of the mounting plate, when the bolt is broken each time, the whole central part fatigue test bed must be disassembled to replace the bolt, so that the workload is large and the period is long.
Disclosure of Invention
In view of the above-mentioned circumstances of the prior art, it is an object of the present invention to provide a rotor transition shaft fixing device that solves the problem of frequent breakage of the transition shaft connecting bolts.
The utility model provides a rotor transition axle fixing device for central part fatigue test, mainly includes platform bottom plate, mounting panel and transition axle, wherein the coaxial trompil in platform bottom plate and mounting panel center, and the centre bore diameter ratio of platform bottom plate is big than the centre bore of mounting panel, reaches the effect of guaranteeing that platform bottom plate and hub connection bolt do not interfere with. The mounting panel is connected and is fixed on the platform bottom plate, and the transition axle bottom sets up the boss, and the boss passes the centre bore of mounting panel, and the step face falls on and connects and fix on the mounting panel, and the boss outer lane is equipped with the external screw thread, and the boss bottom is equipped with the cross fluting, and the transition axle bottom loops through big packing ring, big nut, clamp bolt, and nut and the limiting plate of taking the cross inserted key carry out spacing locking.
Rotor transition axle fixing device, the platform bottom plate is the hexagon flat board, and the lower surface welds on laboratory ground rail platform. The mounting panel also is the hexagon flat board, and the centre bore of mounting panel and transition axle bottom boss are transition fit to when making the transition axle bear the moment of flexure, the mounting panel can regard as limit structure, in order to further realize spacing locking, nevertheless, the centre bore of mounting panel and transition axle bottom boss also can be interference fit.
The rotor wing transition shaft fixing device adopts multiple connection fixing, limiting and locking to stably fix the transition shaft on the central bottom plate platform, solves the problem that the connection bolt of the transition shaft is frequently broken in the fatigue test process of the central part, ensures that the connection bolt of the transition shaft and the bottom plate is not broken or loosened after the fatigue test of the central part is finished, has stable loading of a test bed, has a coordinated structure and good test environment, greatly saves the cost of manpower and material resources and shortens the test period.
Drawings
Figure 1 is a bottom view of a rotor transition shaft fixture of the present invention.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Detailed Description
The technical scheme of the invention is clearly and completely described in combination with the embodiment of the invention by referring to the attached drawings.
Fig. 1 is a bottom view of a rotor transition shaft fixture of the present invention, and fig. 2 is a sectional view taken along line a-a of fig. 1. As shown in the figure, the rotor transition shaft fixing device for the fatigue test of the central part mainly comprises a platform bottom plate 1, a mounting plate 2 and a transition shaft 4. The center of the platform bottom plate 1 and the center of the mounting plate 2 are provided with holes, and the diameter of the center hole of the platform bottom plate 1 must be larger than that of the boss at the bottom of the transition shaft 4. The mounting plate 2 is connected and fixed on the platform bottom plate 1 through the connecting bolt 3 (herein referred to as a plate connecting bolt), the boss is arranged at the bottom of the transition shaft 4, the boss penetrates through the center hole of the mounting plate 2, the step surface falls on the mounting plate 2, and the boss at the bottom of the transition shaft 4 is subjected to multiple limiting and locking through the large mounting washer 6, the large nut 7, the compression bolt 8, the clamping nut 9 and the limiting plate 10 in sequence.
Specifically, the platform bottom plate 1 may be a hexagonal flat plate, and the lower surface is welded on the ground rail platform of the laboratory. The mounting plate 2 can also be a hexagonal flat plate, the center hole of the mounting plate 2 and the boss at the bottom of the transition shaft 4 are in transition fit or interference fit, so that the mounting plate 2 can be used as a limiting structure when the transition shaft 4 bears bending moment, namely, the first limiting locking device, and the transition fit is optimized in consideration of the convenience of mounting.
After the boss arranged at the bottom of the transition shaft 4 passes through the center hole of the mounting plate 2, the step surface falls on the mounting plate 2, and the transition shaft 4 is fixedly connected to the mounting plate 2 by using 12 connecting bolts 5 (referred to as shaft connecting bolts in the present document), which is a second limit locking device. Because the diameter of the central hole of the platform bottom plate 1 is larger than that of the boss at the bottom of the transition shaft 4, the effect of ensuring that the platform bottom plate 1 is not interfered with the shaft connecting bolt can be achieved. The mounting centers of the platform bottom plate 1, the mounting plate 2 and the transition shaft 4 are on the same axis.
The outer ring of the boss of the transition shaft 4 is also provided with external threads, after the boss is sleeved with the large washer 6, the large nut 7 is screwed in until the large washer 6 is attached to the mounting plate 2, and the third limiting locking device is formed.
The bottom end of the boss of the transition shaft 4 is provided with a cross slot, and the limiting plate 10 is provided with a cross inserting key. The cross inserting key of the limiting plate 10 is clamped into the cross groove at the bottom end of the boss of the transition shaft 4, the large nut 7 is adjusted to enable the limiting plate 10 to be attached to the surface of the large nut 7, 16 threaded through holes are formed in the large nut 7, 16 unthreaded holes are formed in the limiting plate 10, and 16 compression bolts 8 and a tightening nut 9 are screwed in; the end of the pressing bolt 8 is tightly pressed against the large washer 6, and the pressing nut 9 is tightly pressed against the limiting plate 10, which is a fourth limiting and locking device.
The rod end of the hold-down bolt 8 may be provided with a polished rod section of slightly smaller diameter than the thread to prevent damage to the thread when the rod end abuts against the large washer 6.
The rotor wing transition shaft fixing device adopts multiple connection fixing, limiting and locking to stably fix the transition shaft on the central base plate platform, solves the problem that the connection bolt of the transition shaft is frequently broken in the fatigue test process of the central part, and the connection bolt of the transition shaft and the base plate is not broken or loosened after the fatigue test of the central part is completed.
Claims (8)
1. The utility model provides a rotor transition axle fixing device, including platform bottom plate [1], mounting panel [2] and transition axle [4], wherein platform bottom plate [1] and the coaxial trompil in mounting panel [2] center, and the centre bore diameter ratio of platform bottom plate [1] is big than the centre bore of mounting panel [2], mounting panel [2] connection is fixed on platform bottom plate [1], transition axle [4] bottom sets up the boss, the boss passes the centre bore of mounting panel [2], the step face falls on and is fixed on mounting panel [2], the boss outer lane is equipped with the external screw thread, the boss bottom is equipped with the cross fluting, transition axle [4] bottom boss loops through big packing ring [6], big nut [7], clamp bolt [8], and clamp nut [9] and limiting plate [10] of taking the cross inserted key carry out spacing locking.
2. The rotor wing transition shaft fixing device according to claim 1, wherein the central hole of the mounting plate (2) is in transition fit with the boss at the bottom of the transition shaft (4).
3. The rotor wing transition shaft fixing device according to claim 1, wherein the rotor wing transition shaft fixing device sequentially passes through a large washer [6], a large nut [7], a compression bolt [8], a clamping nut [9] and a limiting plate [10] with a cross inserting key for limiting and locking, the large washer [6] is sleeved into a boss, the large nut [7] is screwed until the large washer [6] is attached to the mounting plate [2], the cross inserting key of the limiting plate [10] is clamped into a cross groove at the bottom end of the boss of the transition shaft [4], the large nut [7] is adjusted to enable the limiting plate [10] to be attached to the surface of the large nut [7], the large nut [7] and the limiting plate [10] are respectively provided with a threaded through hole and a unthreaded hole, the compression bolt [8] and the clamping nut [9] are screwed, the end of the compression bolt [8] abuts against the large washer [6] and the clamping nut [9] compresses the.
4. The rotor wing transition shaft fixing device according to claim 3, wherein the rod end of the pressure bolt (8) is provided with a polished rod section with a diameter slightly smaller than the thread diameter.
5. The rotor wing transition shaft attachment arrangement according to claim 1, wherein the platform base plate [1] is a hexagonal flat plate with a lower surface welded to the laboratory ground rail platform.
6. The rotor wing transition shaft attachment arrangement of claim 1, wherein the mounting plate [2] is a hexagonal plate.
7. The rotor wing transition shaft fixing device according to claim 1, wherein the mounting plate [2] is connected and fixed on the platform bottom plate [1] through a plate connecting bolt [3], and the step surface of the boss of the transition shaft [2] is connected and fixed on the mounting plate [2] through a shaft connecting bolt [5 ].
8. The rotor wing transition shaft fixing device according to claim 1, wherein the central hole of the mounting plate (2) is in transition fit with a boss at the bottom of the transition shaft (4); the large washer [6], the large nut [7], the compression bolt [8], the clamping nut [9] and the limiting plate [10] with a cross inserting key are sequentially used for limiting and locking, the large nut [7] is screwed until the large washer [6] is attached to the mounting plate [2] after the large washer [6] is sleeved into the boss, the cross inserting key of the limiting plate [10] is clamped into the cross groove at the bottom end of the boss of the transition shaft [4], the large nut [7] is adjusted to enable the limiting plate [10] to be attached to the surface of the large nut [7], a threaded through hole and a unthreaded hole are respectively arranged on the large nut [7] and the limiting plate [10], the compression bolt [8] and the clamping nut [9] are screwed, the end of the compression bolt [8] abuts against the large washer [6], and the clamping nut [9] compresses the limiting plate [10 ]; wherein the rod end of the hold-down bolt (8) is provided with a polished rod section with a diameter slightly smaller than the diameter of the thread; wherein the mounting plate [2] is connected and fixed on the platform bottom plate [1] through a plate connecting bolt [3], and the step surface of the boss of the transition shaft [2] is connected and fixed on the mounting plate [2] through a shaft connecting bolt [5 ].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910947909.0A CN110589025B (en) | 2019-09-29 | 2019-09-29 | Rotor transition shaft fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910947909.0A CN110589025B (en) | 2019-09-29 | 2019-09-29 | Rotor transition shaft fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110589025A true CN110589025A (en) | 2019-12-20 |
| CN110589025B CN110589025B (en) | 2022-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910947909.0A Active CN110589025B (en) | 2019-09-29 | 2019-09-29 | Rotor transition shaft fixing device |
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| CN (1) | CN110589025B (en) |
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| Publication number | Publication date |
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| CN110589025B (en) | 2022-09-06 |
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