A rotor system misalignment fault simulation device and method

Abstract

The application relates to the technical field of rotor dynamics test, and discloses a device for simulating a misalignment fault of a support point of a rotor system and a foundation loading device. Misalignment loading modules are arranged at the bottoms of each support point bearing of a test rotor, and the first driving unit and the second driving unit of each misalignment loading module are used to realize misalignment or displacement loading of the support point bearing position of the test rotor. Through coordination of the positions of the three driving units, independent control of the support point bearing of the test rotor in three degrees of freedom can be realized, and horizontal direction offset misalignment, vertical direction offset misalignment and overturning direction misalignment of the support point bearing can be realized at the same time. In addition, displacement or rotation angle excitation can be controlled in the three misalignment directions, and a hardware foundation is provided for dynamics test of a rotor system in a real environment.

Description

Technical Field

[0001] This invention relates to the field of rotor dynamics testing technology, and discloses a device and method for simulating rotor system misalignment faults and foundation loading. Background Technology

[0002] Rotor dynamics is an important research topic in fields such as aerospace, power equipment, automotive systems, and rail transportation. To study the dynamic behavior of rotors under various operating conditions, rotor dynamics testing equipment must be able to comprehensively reflect all the problems that rotors may encounter in practice. During operation, the bearings that constrain the rotor's position may be subjected to external displacement excitations. These displacement excitations can be multidirectional and multi-faceted, including translational and angular displacement excitations.

[0003] Furthermore, in the actual use of rotor equipment, even without external excitation, various forms of misalignment may occur between the bearings used to limit the rotor position due to manufacturing and assembly errors, causing misalignment problems in the rotor system.

[0004] In reality, misalignment in various directions and various forms of displacement excitation may occur simultaneously. Therefore, there is an urgent need to design and manufacture experimental equipment that can comprehensively simulate misalignment defects and displacement excitation to facilitate a more comprehensive study of the actual dynamic behavior of rotors. Summary of the Invention

[0005] The purpose of this invention is to provide a device for simulating rotor system fulcrum misalignment faults and basic loading. This device can simultaneously achieve horizontal misalignment, vertical misalignment, and rotational misalignment of the fulcrum bearing, and can also control the application of displacement or angular excitation in the three misalignment directions, thus providing a hardware foundation for dynamic testing of rotor systems in real environments.

[0006] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows:

[0007] A device for simulating rotor system misalignment fault and foundation loading includes horizontal mounting platforms, the number of which is the same as the number of test rotor bearings, and each horizontal mounting platform is used to fix one of the bearing bearings of the test rotor.

[0008] Each of the horizontal mounting platforms is equipped with an asymmetrical loading module, and each asymmetrical loading module includes two sets of opposing parallelogram support structures. Each set of parallelogram support structures includes two vertical support rods, which are hinged to a horizontal support base. A horizontal tie rod is hinged between the two vertical support rods. The horizontal tie rod, the horizontal support base, and the two vertical support rods together form a parallelogram support structure. The two sets of parallelogram support structures are spaced apart along the axial direction of the test rotor. A translational support platform is provided between the two sets of parallelogram support structures. The translational support platform is movably mounted between the two sets of parallelogram support structures via sliders mounted on corresponding vertical support rods. The horizontal mounting platform is movably mounted on the translational support platform via two hinge points perpendicular to the axial direction of the test rotor.

[0009] Each of the misaligned loading modules further includes a first driving unit and a second driving unit; wherein, there are two first driving units, one end of each first driving unit is fixed to the horizontal support base, and the other end of each first driving unit is fixed to the bottom of the horizontal mounting platform along the test rotor axis, and the two first driving units are used to provide a vertical driving force to the horizontal mounting platform; one end of each second driving unit is fixed to the support base, and the other end of each second driving unit is fixed to the translational support platform, and is used to provide a horizontal driving force perpendicular to the test rotor axis to the horizontal mounting platform.

[0010] Furthermore, the translational support platform is tilted at a 15° angle to the horizontal plane with the test rotor axis as the rotation center.

[0011] Furthermore, both the first drive unit and the second drive unit are hydraulic telescopic rods.

[0012] Furthermore, it also includes a fixed base, on which a slide rail is provided, and at the bottom of each of the horizontal support bases, a guide groove is provided that cooperates with the slide rail.

[0013] Furthermore, each of the translational support platforms is provided with a bearing seat, which is detachably fixed to the translational support platform by screws, and the bearing seat is used to fix the corresponding pivot bearing.

[0014] Furthermore, the translational support platform includes a horizontal guide link and a horizontal loading link arranged parallel to each other, and a support assembly for hinged mounting of the bearing seat is provided between the horizontal guide link and the horizontal loading link; the horizontal guide link is hinged between the two parallelogram support structures through two sliders located on the two parallelogram support structures, and the horizontal loading link is hinged between the two parallelogram support structures through two sliders located on the two parallelogram support structures.

[0015] Furthermore, the hinge point between the second drive unit and the translational support platform is located on the horizontal loading link.

[0016] Furthermore, it also includes a power unit for driving the test rotor to rotate.

[0017] Furthermore, the power unit is a servo motor, and the servo motor is driven to the test rotor via a coupling.

[0018] Compared with the prior art, the beneficial effects of this invention are as follows: This invention sets a misalignment loading module at the bottom of each support bearing of the test rotor, and each set of misalignment loading modules consists of three independent drive units; the two first drive units mainly control the extension and retraction to achieve the vertical lifting and tilting of the horizontal mounting platform and the tilting in the direction perpendicular to the axis of the test rotor; the second drive unit mainly achieves the horizontal offset of the test rotor through extension and retraction; by coordinating the positions of the three drive units, the support bearings of the test rotor can be independently controlled in three degrees of freedom, thereby achieving horizontal misalignment, vertical misalignment, and tilting misalignment of the support bearings, while also controlling the application of displacement or rotation excitation in the three misalignment directions, providing a hardware foundation for the dynamic testing of the rotor system in a real environment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the simulated rotor system support misalignment fault and the foundation loading device structure in Example 1 or 2;

[0020] Figure 2 This is a schematic diagram of the misaligned loading module in Example 1 or 2;

[0021] Figure 3 This is a schematic diagram of the bottom structure of the horizontal support base in Embodiment 1 or 2;

[0022] Figure 4 This is a schematic diagram of the translational support platform in Example 1 or 2;

[0023] Figure 5 This is a schematic diagram of the parallelogram support structure in Example 1 or 2;

[0024] The components include: 1. Vertical support rod; 2. Horizontal support base; 3. Horizontal tie rod; 4. Translational support platform; 401. Horizontal guide link; 402. Horizontal loading link; 403. Support assembly; 5. Slider; 6. First drive unit; 7. Second drive unit; 8. Test rotor; 9. Slide rail; 10. Fixed base; 11. Bearing seat; 12. Power unit. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the above-described subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0026] Example 1

[0027] See Figures 1-5 A device for simulating rotor system misalignment fault and foundation loading includes horizontal mounting platforms, the number of which is the same as the number of support points of the test rotor 8, and each horizontal mounting platform is used to fix one of the support point bearings of the test rotor 8.

[0028] Each of the horizontal mounting platforms is equipped with an off-center loading module, and each off-center loading module includes two sets of opposing parallelogram support structures. Each set of parallelogram support structures includes two vertical support rods 1, which are hinged to a horizontal support base 2. A horizontal tie rod 3 is hinged between the two vertical support rods 1. The horizontal tie rod 3, the horizontal support base 2, and the two vertical support rods 1 together form a parallelogram support structure. The two sets of parallelogram support structures are spaced apart along the axial direction of the test rotor 8. A translational support platform 4 is provided between the two sets of parallelogram support structures. The translational support platform 4 is movably mounted between the two sets of parallelogram support structures by sliders 5 mounted on the corresponding vertical support rods 1. The horizontal mounting platform is movably mounted on the translational support platform 4 by two hinge points perpendicular to the axial direction of the test rotor 8.

[0029] Each of the misaligned loading modules further includes a first drive unit 6 and a second drive unit 7; wherein, there are two first drive units 6, one end of each first drive unit 6 is fixed to the horizontal support base 2, and the other end of each first drive unit 6 is fixed to the bottom of the horizontal mounting platform along the axial direction of the test rotor 8, and the two first drive units 6 are used to provide a vertical driving force to the horizontal mounting platform; one end of the second drive unit 7 is fixed to the support base, and the other end of the second drive unit 7 is fixed to the translational support platform 4, and is used to provide a horizontal driving force perpendicular to the axial direction of the test rotor 8 to the horizontal mounting platform.

[0030] In this embodiment, misalignment loading modules are installed at the bottom of each pivot bearing of the test rotor 8. Each set of misalignment loading modules consists of three independent drive units: one second drive unit 7 and two first drive units 6. The two first drive units 6 mainly control the vertical lifting and lowering of the horizontal mounting platform and the rotation in the direction perpendicular to the axis of the test rotor 8 by controlling its extension and retraction. The second drive unit 7 mainly controls the horizontal offset of the test rotor 8 by extension and retraction. By coordinating the positions of the three drive units, the pivot bearings of the test rotor 8 can be independently controlled in three degrees of freedom. This allows for horizontal misalignment, vertical misalignment, and rotation misalignment of the pivot bearings, while also controlling the application of displacement or rotational excitation in these three misalignment directions. This provides a hardware foundation for the dynamic testing of the rotor system in a real environment.

[0031] It should be noted that during the misalignment test of the test rotor 8 in this embodiment, the test rotor 8 can be driven to rotate by the drive motor; in addition, the above three misalignments can be implemented individually, in pairs, or all three together, and a total of 7 different misalignment excitation methods can be achieved on a single pivot bearing.

[0032] In this embodiment, both the first drive unit 6 and the second drive unit 7 are hydraulic telescopic rods.

[0033] Example 2

[0034] See Figures 1-5 A device for simulating rotor dynamics misalignment and loading tests includes a test rotor 8 and a drive unit, two sets of misalignment loading modules, and a horizontal support base 2. Each set of misalignment loading modules, the test rotor 8, and the power unit 12 are mounted on a fixed base 10 via lockable slide rails 9. The positions of the misalignment loading modules and drive modules on the fixed base 10 can be adjusted as needed to adapt to the installation and testing requirements of rotors of different lengths and structures.

[0035] The power unit 12 consists of a servo drive motor, a coupling, and a sliding base. The test rotor 8 is connected to the servo drive motor via the coupling. In actual engineering tests, test personnel can install a reducer between the servo drive motor and the test rotor 8 to further control the speed of the test rotor 8, depending on the test requirements.

[0036] The two sets of misaligned loading modules have the same mechanism and structural dimensions. For example... Figure 2 The diagram shows the overall structure of one set of misaligned loading modules. The misaligned loading module consists of two sets of parallelogram support structures, a first drive unit 6, a second drive unit 7, and a horizontal support base 2. The horizontal support base 2 is connected to the fixed base 10 via a locking slide rail 9, used to adjust the position of each set of misaligned loading modules.

[0037] The two sets of parallelogram support structures are identical in size and structure. Each set consists of two vertical support rods 1 and a horizontal tie rod 3. The vertical support rods 1 are connected to the horizontal support base 2 and the horizontal tie rod 3 via rotating hinges, forming a parallelogram mechanism. All rotating hinges in the parallelogram support structure maintain parallel axes of rotation. The two sets of parallelogram support structures are installed in the same way, and all axes of rotation of the hinges between them and the horizontal support base 2 are parallel. In practice, hinges can be implemented using hinged bolts, pins, etc.

[0038] Two sets of parallelogram support structures are connected by a translational support platform 4. The translational support platform 4 consists of multiple sliders 5 movably mounted on corresponding vertical support rods 1. The sliders 5 can slide along their respective vertical support rods 1. In practice, each slider 5 and its corresponding vertical support rod 1 can be manufactured using commercially available standard linear guide rails 9 and sliders 5. The sliders 5 on the two sets of parallelogram support structures are connected by horizontal guide rods 401 and horizontal loading rods 402. The horizontal guide rods 401 or 402 are hinged to their corresponding sliders 5, allowing for relative rotation. In practice, the clearance between the rotating shafts and mating holes in these rotating pairs should be minimized; interference fits can also be used. During manufacturing, the parallelism of the rotating pairs between the horizontal guide rods 401 and 402 and the sliders 5 should be ensured. The translational support platform 4, thus installed, has translational freedom in the horizontal direction and along the vertical support rod 1.

[0039] The support assembly 403 is connected to the translational support platform 4 by a rotating hinge. The bearing seat 11 of the fulcrum bearing of the test rotor 8 is fixed to the upper surface of the support assembly 403 by bolts. In practice, the test bearing seat 11 can be replaced according to the test requirements.

[0040] like Figure 5 As shown, the line connecting the two hinge points of the translational support platform 4 should not be parallel to the two hinge points of the horizontal tie rod 3 to avoid transient structural changes that could compromise platform stability. In this embodiment, the distance between the axis of rotation of the hinge between the translational support platform 4 and the horizontal guide link 401 and the axis of rotation of the hinge between the translational support platform 4 and the horizontal loading link 402 is d2; the distance between the axes of rotation of the hinges at the bottom of the two vertical support rods 1 of the same parallelogram support structure is d3; and the distance between the axis of rotation of the hinge between the translational support platform 4 and the horizontal guide link 401 and the corresponding vertical support rod 1 is d1. The ratio between d1, d2, and d3 can be set as d1:d2:d3 = 10:31:50. Furthermore, to allow the upper plane of the support assembly 403 to swing near the horizontal direction and reduce control difficulty, the upper plane of the support assembly 403 forms a 15° angle with the axis of rotation of the hinge connecting it to the translational support platform 4.

[0041] like Figure 3 As shown, both the first drive unit 6 and the second drive unit 7 employ hydraulic actuators. In each hydraulic actuator group, the hydraulic push rod can move or rotate along the axis of the hydraulic sleeve.

[0042] The installation method of the hydraulic actuator should ensure that it does not affect the degree of freedom of movement of the support assembly 403. One end of the hydraulic actuator of the first drive unit 6 is connected to the horizontal support base 2 via a universal joint, and the other end is connected to the bottom of the translational support platform 4 via a universal joint. One end of the hydraulic actuator of the second drive unit 7 is connected to the horizontal support base 2 via a universal joint, and the other end is connected to the horizontal loading link 402 via a universal joint.

[0043] In practice, misalignment faults in the rotor system can be simulated and adjusted by controlling the overall length of each hydraulic actuator. By setting a certain action mode for the hydraulic actuator, a basic displacement or rotational excitation can be provided to the rotor system.

[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for simulating rotor system support misalignment faults and foundation loading, characterized in that, Includes horizontal mounting platforms, the number of which is the same as the number of support points of the test rotor (8), each of which is used to fix one of the support point bearings of the test rotor (8); Each of the horizontal mounting platforms is provided with an off-center loading module, and each off-center loading module includes two sets of opposing parallelogram support structures; each set of parallelogram support structures includes two vertical support rods (1), the two vertical support rods (1) are respectively hinged to the horizontal support base (2), and a horizontal tie rod (3) is hinged between the two vertical support rods (1). The horizontal tie rod (3), the horizontal support base (2) and the two vertical support rods (1) together form a parallelogram support structure; the two sets of parallelogram support structures are spaced apart along the axial direction of the test rotor (8), and a translational support platform (4) is provided between the two sets of parallelogram support structures. The translational support platform (4) is movably mounted between the two sets of parallelogram support structures by a slider (5) mounted on the corresponding vertical support rod (1); the horizontal mounting platform is movably mounted on the translational support platform (4) through two hinge points perpendicular to the axial direction of the test rotor (8); Each of the misaligned loading modules further includes a first drive unit (6) and a second drive unit (7); wherein, there are two first drive units (6), one end of the two first drive units (6) is fixed to the horizontal support base (2), and the other end of the two first drive units (6) is fixed to the bottom of the horizontal mounting platform along the axial direction of the test rotor (8), and the two first drive units (6) are used to provide a vertical driving force to the horizontal mounting platform; one end of the second drive unit (7) is fixed to the support base, and the other end of the second drive unit (7) is fixed to the translational support platform (4), and is used to provide a horizontal driving force perpendicular to the axial direction of the test rotor (8) to the horizontal mounting platform.

2. The device for simulating rotor system misalignment fault and foundation loading according to claim 1, characterized in that, The translational support platform (4) is tilted at a 15° angle to the horizontal plane with the axial direction of the test rotor (8) as the rotation center.

3. The device for simulating rotor system misalignment fault and foundation loading according to claim 1, characterized in that, Both the first drive unit (6) and the second drive unit (7) are hydraulic telescopic rods.

4. The device for simulating rotor system misalignment fault and foundation loading according to claim 1, characterized in that, It also includes a fixed base (10), on which a slide rail (9) is provided, and each of the horizontal support bases (2) is also provided with a guide groove at the bottom that cooperates with the slide rail (9).

5. The device for simulating rotor system misalignment fault and foundation loading according to claim 1, characterized in that, Each of the translational support platforms (4) is provided with a bearing seat (11), which is detachably fixed to the translational support platform (4) by screws. The bearing seat (11) is used to fix the corresponding pivot bearing.

6. The device for simulating rotor system misalignment fault and foundation loading according to claim 5, characterized in that, The translational support platform (4) includes a horizontal guide link (401) and a horizontal loading link (402) arranged parallel to each other. A support assembly (403) for hinged mounting of the bearing seat (11) is provided between the horizontal guide link (401) and the horizontal loading link (402). The horizontal guide link (401) is hinged between the two parallelogram support structures by two sliders (5) located on the two parallelogram support structures. The horizontal loading link (402) is hinged between the two parallelogram support structures by two sliders (5) located on the two parallelogram support structures.

7. The device for simulating rotor system misalignment fault and foundation loading according to claim 6, characterized in that, The hinge point between the second drive unit (7) and the translational support platform (4) is located on the horizontal loading link (402).

8. The device for simulating rotor system misalignment fault and foundation loading according to claim 1, characterized in that, It also includes a power unit (12) for driving the test rotor (8) to rotate.

9. The device for simulating rotor system misalignment fault and foundation loading according to claim 8, characterized in that, The power unit (12) is a servo motor, and the servo motor is driven to the test rotor (8) via a coupling.

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