A main rotor stiffness detection device

Abstract

This utility model discloses a main rotor stiffness testing device, relating to the field of main rotor stiffness testing technology. It includes a base, a rotating assembly, a rotor fixing assembly, and a support assembly. The rotating assembly includes a worm gear reducer and a rotating shaft. The worm gear reducer is mounted on the top left end of the base, and one end of the rotating shaft is connected to the output end of the worm gear reducer, while the other end is connected to the rotor fixing assembly. The support assembly includes a bearing housing, which houses the rotating shaft via bearings. A laser level is mounted on the bearing housing, and a ruler is mounted on the right side of the base. This utility model uses the worm gear reducer to drive the rotating shaft, which in turn causes the rotor fixing assembly, fixed to the rotating shaft, to drive the main rotor to rotate, facilitating the measurement of required values.

Description

Technical Field

[0001] The utility model relates to the technical field of main rotor stiffness detection, in particular to a main rotor stiffness detection device. Background Art

[0002] After an accident, the main rotor of a helicopter can continue to be used only if the droop of the main rotor is within a certain range. Therefore, after an accident, it is necessary to use certain inspection methods on the main rotor to check whether its droop meets the requirements.

[0003] The current solution for checking the droop of the main rotor is to fix the main rotor on a fixture, align the laser tangentially with the main rotor end, and measure points on a height gauge. This requires repeated disassembly of the main rotor, which is time-consuming and labor-intensive. At the same time, this method is difficult to ensure the horizontality of the inspection tooling, and the error deviation of the measurement data is large.

[0004] Therefore, it is necessary to develop a main rotor stiffness detection device that can conveniently measure the droop of the main rotor, provide more accurate test data, and adapt to main rotor blades of different models of helicopters. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and to provide a main rotor stiffness detection device.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a main rotor stiffness detection device, characterized in that it includes a base, a rotating assembly, a rotor fixing assembly, and a supporting assembly; the rotating assembly includes a worm reducer and a rotating shaft, the worm reducer is installed at the left end of the top of the base, one end of the rotating shaft is connected to the output end of the worm reducer through a coupling, and the other end is connected to the rotor fixing assembly;

[0007] The support assembly includes a bearing seat mounted on the top of the base, and the bearing seat rotates the shaft through the bearing sleeve;

[0008] A laser level is arranged on the bearing seat, and a ruler is arranged on the right side of the base.

[0009] In the above technical solution, there are two bearing seats, and the bottom of the bearing seat is connected to the base through a horizontal adjustment component.

[0010] In the above technical solution, the horizontal adjustment assembly includes a pad and jacking bolts, the top of the pad is connected to the bearing seat, and the bottom is connected to the base through two jacking bolts.

[0011] In the above technical solution, the rotor fixing assembly includes a rotor clamp and a clamp flange, and the rotor clamp is detachably connected to the rotating shaft via the clamp flange.

[0012] In the above technical solution, a triangular reinforcement plate is provided on the right side of the base.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1) The utility model drives the rotating shaft to rotate through the worm reducer, so that the rotor fixing assembly fixed on the rotating shaft drives the main rotor to rotate, which is convenient for measuring the required values.

[0015] 2) The utility model adjusts the angle of the rotor by rotating the assembly, thereby reducing the error caused by manual operation.

[0016] 3) A laser level for detecting the stiffness of the main rotor is installed above the rotor fixing assembly of the utility model, and readings are taken by taking the difference, which is more convenient to use.

[0017] 4) The utility model is equipped with a replaceable rotor fixture, and different rotor fixtures can better adapt to different models of rotors.

[0018] 5) The utility model can reduce the error caused by the inclination of the main rotor installation through the horizontal adjustment component, so that the test data is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a measurement schematic diagram of the utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the rotor fixture.

[0022] Among them, 1-base, 11-triangular reinforcement plate, 2-rotating assembly, 21-worm reducer, 22-rotating shaft, 23-coupling, 3-rotor fixing assembly, 31-rotor clamp, 32-clamp flange, 4-support assembly, 41-bearing seat, 42-bearing, 51-laser level, 52-ruler, 61-pad, 62-lifting bolt. DETAILED DESCRIPTION

[0023] The following is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but they do not constitute a limitation of the utility model and are only used as examples. At the same time, the advantages of the utility model will become clearer and easier to understand through the description.

[0024] Referring to the attached drawings, it can be seen that a main rotor stiffness detection device is characterized in that it includes a base 1, a rotating assembly 2, a rotor fixing assembly 3, and a supporting assembly 4; the rotating assembly 2 includes a worm reducer 21 and a rotating shaft 22, the worm reducer 21 is installed at the top left end of the base 1, one end of the rotating shaft 22 is connected to the output end of the worm reducer 21 through a coupling 23, and the other end is connected to the rotor fixing assembly 3;

[0025] The support assembly 4 includes a bearing seat 41 installed on the top of the base 1. The bearing seat 41 is fitted with the rotating shaft 22 through a bearing 42 to ensure the rotation and fixed installation of the rotating shaft 22.

[0026] A laser level 51 is provided on the bearing seat 41, and a ruler 52 is provided on the right side of the base 1; the laser level 51 is used to detect the stiffness of the main rotor and facilitate the measurement of the position of the reference point. The laser level 51 can also adjust the level to reduce measurement errors; the ruler 52 is used for intuitive reading.

[0027] There are two bearing seats 41 , and the bottom of the bearing seats 41 is connected to the base 1 through a horizontal adjustment component 6 .

[0028] The horizontal adjustment assembly 6 includes a pad 61 and a jacking bolt 62. The top of the pad 61 is connected to the bearing seat 41, and the bottom is connected to the base 1 through two jacking bolts 62. The rotating shaft 22 is installed on the base 1 through the support assembly 4 and contacts the horizontal adjustment assembly 6, which is used to adjust the level of the rotating shaft 22; the rotating shaft 22 is driven to rotate by the worm reducer 21, so that the rotor fixing assembly 3 fixed on the rotating shaft 22 drives the main rotor to rotate, which is convenient for measuring the required values. At the same time, the error caused by the inclination of the main rotor installation can be reduced by the horizontal adjustment assembly 6; the distance between the pad 61 and the base 1 is adjusted by the jacking bolt 62, and the horizontality of the rotating shaft 22 is further adjusted to reduce the measurement error.

[0029] The rotor fixing assembly 3 includes a rotor clamp 31 and a clamp flange 32, and the rotor clamp 31 is detachably connected to the rotating shaft 22 via the clamp flange 32; the rotor fixing assembly 3 and the base 1 do not interfere with each other; the rotor clamp 31 is a replaceable part, and the replaceable rotor clamp 31 is better adapted to different models of main rotors and is more stable after installation.

[0030] A triangular reinforcement plate 11 is arranged on the right side of the base 1 to support the main rotor more stably.

[0031] The method of using the utility model comprises the following steps:

[0032] Step 1: Check the main rotor stiffness detection device and calibrate it; select a suitable rotor fixture 31, install the rotor, install and fix the root of the main rotor into the rotor fixture 31, and stabilize it for five minutes;

[0033] Step 2: Install a laser level 51 on the bearing seat 41, and record the point 1 on the ruler 52 corresponding to the laser level 51; move the ruler 52 to a suitable position, and make the end of the rotor tail wing tangent to the ruler 52, and record the corresponding point 2 on the ruler 52, and the distance from point 2 to point 1 on the ruler 52 is Xi; rotate the rotor 180° through the worm reducer 21, and the end of the rotor tail wing corresponds to point 3 on the ruler 52, and the distance from point 3 to point 1 on the ruler 52 is Xe; rotate the rotor 90° through the worm reducer 21, and the end of the rotor tail wing corresponds to point 4 on the ruler, and the distance from point 4 to point 1 is Z;

[0034] Step 3: If the obtained values ​​of Xi, Xe and Z are within the limit range, the rotor can continue to be used, otherwise it cannot be used; the limit range of Xi, Xe and Z is: Xi≤480mm(18.897in), 178mm(7.007in)≤Xe, Z≤340mm(13.385in).

[0035] In actual use, the bearing 42 is a deep groove ball bearing, and a bearing retaining ring 421 is provided on the bearing 42 ; a reducer pad 211 is provided at the bottom of the worm reducer 21 .

[0036] Other parts not described belong to the prior art.

Claims

1. A main rotor stiffness detection device, characterized in that: The invention comprises a base (1), a rotating assembly (2), a rotor fixing assembly (3), and a supporting assembly (4); the rotating assembly (2) comprises a worm reducer (21) and a rotating shaft (22); the worm reducer (21) is mounted on the left end of the top of the base (1); one end of the rotating shaft (22) is connected to the output end of the worm reducer (21) through a coupling (23), and the other end is connected to the rotor fixing assembly (3); The support assembly (4) comprises a bearing seat (41) mounted on the top of the base (1), and the bearing seat (41) is fitted with a rotating shaft (22) via a bearing (42); A laser level (51) is arranged on the bearing seat (41), and a ruler (52) is arranged on the right side of the base (1).

2. A main rotor stiffness detection device according to claim 1, characterized in that: There are two bearing seats (41), and the bottom of the bearing seats (41) is connected to the base (1) through a horizontal adjustment component (6).

3. A main rotor stiffness detection device according to claim 2, characterized in that: The horizontal adjustment assembly (6) comprises a backing plate (61) and jacking bolts (62); the top of the backing plate (61) is connected to the bearing seat (41), and the bottom is connected to the base (1) via two jacking bolts (62).

4. A main rotor stiffness detection device according to claim 1, characterized in that: The rotor fixing assembly (3) comprises a rotor clamp (31) and a clamp flange (32), and the rotor clamp (31) is detachably connected to the rotating shaft (22) via the clamp flange (32).

5. A main rotor stiffness detection device according to claim 1, characterized in that: A triangular reinforcement plate (11) is provided on the right side of the base (1).

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