Rotor system fulcrum misalignment fault simulation and foundation loading device and method

Abstract

The invention relates to the technical field of dynamic tests of rotors, and discloses a device for simulating a fulcrum misalignment fault of a rotor system and loading a foundation, and the device is characterized in that a misalignment loading module is arranged at the bottom of each fulcrum bearing of a test rotor; the first driving unit and the second driving unit of each group of non-alignment loading modules are used for realizing non-alignment or displacement loading of the position of a fulcrum bearing on the test rotor; by coordinating the positions of the three driving units, independent control of a fulcrum bearing of a test rotor in three degrees of freedom can be realized, and displacement or corner excitation can be controlled to be applied in three non-centering directions while horizontal direction offset non-centering, vertical direction offset non-centering and overturning direction non-centering of the fulcrum bearing are realized. And a hardware basis is provided for the dynamic test of the rotor system in a real environment.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor dynamics tests, and discloses a device and method for simulating the misalignment fault of the fulcrum of a rotor system and base loading. Background Art

[0002] The research on rotor dynamics is an important research topic in the fields of aerospace, power equipment, automotive systems, rail transit, etc. In order to study the dynamic behavior of the rotor under various working conditions, the rotor dynamics test equipment must be able to comprehensively reflect various problems that may occur in the actual rotor. During the operation of the rotor, the bearings used to limit its position may be subjected to external displacement excitation. The displacement excitation may be multi-directional and multi-form, including translational displacement excitation and angular displacement excitation.

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

[0004] In practice, various directions of misalignment and various forms of displacement excitation may occur together. Therefore, it is urgent to design and manufacture test equipment that can comprehensively simulate misalignment defects and displacement excitation to help study the actual dynamic behavior of the rotor more comprehensively. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for simulating the misalignment fault of the fulcrum of a rotor system and base loading, which can achieve horizontal offset misalignment, vertical offset misalignment, and flipping misalignment of the fulcrum bearings, and can also control the application of displacement or angular excitation in the three misalignment directions, providing a hardware basis for the dynamic test of the rotor system in a real environment.

[0006] In order to achieve the above technical effects, the technical solution adopted by the present invention is:

[0007] A device for simulating the misalignment fault of the fulcrum of a rotor system and base loading includes a horizontal installation platform. The number of the horizontal installation platforms is the same as the number of the fulcrums of the test rotor, and each horizontal installation platform is used to fix one of the fulcrum bearings of the test rotor;

[0008] Each of the horizontal mounting platforms is respectively provided with an out-of-alignment loading module. Each out-of-alignment loading module includes two sets of parallelogram support structures arranged oppositely; each set of parallelogram support structures includes two vertical support rods, and the two vertical support rods are respectively hinged and installed on the horizontal support base. A horizontal pull rod is hinged between the two vertical support rods. The horizontal pull rod, the horizontal support base and the two vertical support rods enclose a parallelogram support structure; the two sets of parallelogram support structures are arranged at intervals along the axial direction of the test rotor, and a translational support platform is arranged between the two sets of parallelogram support structures. The translational support platform is movably installed between the two sets of parallelogram support structures through sliders installed on the corresponding vertical support rods; the horizontal mounting platform is movably installed on the translational support platform through two hinge points perpendicular to the axial direction of the test rotor.

[0009] Each out-of-alignment loading module further includes a first driving unit and a second driving unit; wherein, there are two first driving units. One ends of the two first driving units are fixed on the horizontal support base, and the other ends of the two first driving units are respectively fixed on the bottom of the horizontal mounting platform along the axial direction of the test rotor. The two first driving units are used to provide a driving force in the vertical direction to the horizontal mounting platform; one end of the second driving unit is fixed on the support base, and the other end of the second driving unit is fixed on the translational support platform, and is used to provide a horizontal driving force perpendicular to the axial direction of the test rotor for the horizontal mounting platform.

[0010] Further, the translational support platform is inclined at an angle of 15° with the horizontal plane with the axial direction of the test rotor as the rotation center.

[0011] Further, the first driving unit and the second driving unit are both hydraulic telescopic rods.

[0012] Further, a fixed base is further included. A slide rail is arranged on the fixed base, and a guiding chute matched with the slide rail is further arranged at the bottom of each horizontal support base.

[0013] Further, a bearing seat is arranged on each translational support platform. The bearing seat is detachably fixed on the translational support platform through screws, and the bearing seat is used to fixedly install the corresponding pivot bearing.

[0014] Furthermore, the translational support platform includes a horizontal guiding link and a horizontal loading link that are arranged in parallel with each other. A support assembly for hingedly mounting the bearing housing is provided between the horizontal guiding link and the horizontal loading link. The horizontal guiding link is hinged between 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 of the second driving unit and the translational support platform is located on the horizontal loading link.

[0016] Furthermore, a power unit is further included, and the power unit is used to drive the test rotor to rotate.

[0017] Furthermore, the power unit is a servo motor, and the servo motor is drivingly connected to the test rotor through a coupling.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: By arranging misalignment loading modules at the bottom of each pivot bearing of the test rotor, each group of misalignment loading modules consists of three independent driving units; two of the first driving units mainly control the lifting of the horizontal installation platform in the vertical direction and the flipping in the direction perpendicular to the axis of the test rotor by controlling the telescoping; the second driving unit mainly realizes the horizontal offset of the test rotor by telescoping; by coordinating the positions of the three driving units, independent control of the pivot bearings of the test rotor in three degrees of freedom can be achieved. Furthermore, while realizing the misalignment of the pivot bearings in the horizontal direction offset, vertical direction offset, and flipping direction, it is also possible to control the application of displacement or angular excitation in the three misalignment directions, providing a hardware basis for the dynamic test of the rotor system in a real environment. Description of the Drawings

[0019] Figure 1 Schematic structural diagram of the simulated rotor system pivot misalignment fault and the basic loading device in Embodiment 1 or 2;

[0020] Figure 2 Schematic structural diagram of the misalignment loading module in Embodiment 1 or 2;

[0021] Figure 3 Schematic structural diagram of the bottom of the horizontal support base in Embodiment 1 or 2;

[0022] Figure 4 Schematic structural diagram of the translational support platform in Embodiment 1 or 2;

[0023] Figure 5 Schematic diagram of the parallelogram support structure in Embodiment 1 or 2;

[0024] Among them, 1 is a vertical support rod; 2 is a horizontal support base; 3 is a horizontal tie rod; 4 is a translational support platform; 401 is a horizontal guiding link; 402 is a horizontal loading link; 403 is a support assembly; 5 is a slider; 6 is a first driving unit; 7 is a second driving unit; 8 is a test rotor; 9 is a slide rail; 10 is a fixed base; 11 is a bearing housing; 12 is a power unit. Specific implementation manner

[0025] The present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings. However, this should not be understood as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. Any technology implemented based on the content of the present invention belongs to the scope of the present invention.

[0026] Embodiment 1

[0027] See Figures 1 - 5 , a simulation rotor system fulcrum misalignment fault and foundation loading device, including a horizontal installation platform, the number of the horizontal installation platforms is the same as the number of fulcrums of the test rotor 8, and each of the horizontal installation platforms is used to fix one of the fulcrum bearings of the test rotor 8;

[0028] Each of the horizontal installation platforms is respectively provided with an alignment misalignment loading module, and each of the alignment misalignment loading modules includes two sets of parallelogram support structures arranged oppositely; each set of parallelogram support structures includes two vertical support rods 1, the two vertical support rods 1 are respectively hinged and installed on the horizontal support base 2, a horizontal tie rod 3 is hinged between the two vertical support rods 1, and the horizontal tie rod 3, the horizontal support base 2 and the two vertical support rods 1 enclose a parallelogram support structure; the two sets of parallelogram support structures are arranged at intervals along the axial direction of the test rotor 8, and a translational support platform 4 is arranged between the two sets of parallelogram support structures, and the translational support platform 4 is movably installed between the two sets of parallelogram support structures through a slider 5 installed on the corresponding vertical support rod 1; the horizontal installation platform is movably installed on the translational support platform 4 through two hinge points perpendicular to the axial direction of the test rotor 8;

[0029] Each of the misalignment loading modules further includes a first driving unit 6 and a second driving unit 7. Among them, there are two first driving units 6. One end of each of the two first driving units 6 is fixed on the horizontal support base 2, and the other ends of the two first driving units 6 are respectively fixed to the bottom of the horizontal installation platform along the axial direction of the test rotor 8. The two first driving units 6 are used to provide a driving force in the vertical direction to the horizontal installation platform. One end of the second driving unit 7 is fixed on the support base, and the other end of the second driving unit 7 is fixed on the translational support platform 4, and is used to provide a driving force in the horizontal direction perpendicular to the axial direction of the test rotor 8 for the horizontal installation platform.

[0030] In this embodiment, by arranging misalignment loading modules at the bottom of each pivot bearing of the test rotor 8, each group of misalignment loading modules is composed of three independent driving units, namely one second driving unit 7 and two first driving units 6. The two first driving units 6 mainly realize the lifting of the horizontal installation platform in the vertical direction and the flipping in the direction perpendicular to the axis of the test rotor 8 by controlling the telescoping; the second driving unit 7 mainly realizes the horizontal offset of the test rotor 8 by telescoping; by coordinating the positions of the three driving units, independent control of the pivot bearings of the test rotor 8 in three degrees of freedom can be achieved. Furthermore, while realizing the misalignment of the pivot bearings in the horizontal direction offset, vertical direction offset, and flipping direction, it is also possible to control the application of displacement or angular excitation in the three misalignment directions, providing a hardware basis for the dynamic test 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 a driving motor. In addition, the above three-direction misalignments can be implemented separately, or in pairs, or all three together, and a total of 7 different misalignment mode excitations can be achieved on a single pivot bearing.

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

[0033] Embodiment 2

[0034] See Figures 1 - 5 , a test device for simulating rotor dynamic misalignment and loading, including a test rotor 8 and a driving unit, two groups of misalignment loading modules, and a horizontal support base 2. Each group of misalignment loading modules, the test rotor 8, and the power unit 12 are respectively installed on a fixed base 10 through lockable slide rails 9, and the positions of the misalignment loading modules and the driving modules on the fixed base 10 can be adjusted as needed to meet the installation and test requirements of rotors with 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 drivingly connected to the servo drive motor through the coupling. In actual engineering tests, the tester can install a speed reducer between the servo drive motor and the test rotor 8 according to the test requirements to further control the speed of the test rotor 8.

[0036] The two misalignment loading modules have the same mechanism and structural dimension composition. As Figure 2 shows a schematic diagram of the overall structural composition of one of the misalignment loading modules. The misalignment loading module consists of two 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 through a locked slide rail 9 for adjusting the position of each misalignment loading module.

[0037] The two parallelogram support structures have the same size and structure. The two parallelogram support structures are both composed of two vertical support rods 1 and a horizontal tie rod 3. The vertical support rods 1 are respectively connected to the horizontal support base 2 and the horizontal tie rod 3 through rotating hinges to form a parallelogram mechanism, and all the rotating axes of the parallelogram support structure always remain parallel to each other. The two parallelogram support structures are installed in the same way, and all the rotating axes of the hinges between them and the horizontal support base 2 are parallel to each other. In actual implementation, the hinge can be realized by using a precision reamed bolt, a pin, etc.

[0038] The two parallelogram support structures are connected through a translation support platform 4. The translation support platform 4 is composed of multiple sliders 5 movably installed on the corresponding vertical support rods 1. The sliders 5 can slide along the corresponding vertical support rods 1. In actual implementation, a commercially available standard linear slide rail 9 and slider 5 can be used between each slider 5 and the corresponding vertical support rod 1 for manufacturing. The sliders 5 on the two parallelogram support structures are connected by a horizontal guiding link 401 and a horizontal loading link 402. The horizontal guiding link 401 or the horizontal loading link 402 is hinged to the corresponding slider 5 to enable relative rotation. In actual implementation, the clearance between the rotating shaft and the mating hole in these rotating pairs should be minimized, or interference fit can also be used. During manufacturing, the parallelism of the rotating pairs between the horizontal guiding link 401 and the horizontal loading link 402 and the sliders 5 should be ensured. The translation support platform 4 installed in this way has translational degrees of freedom in the horizontal direction and along the direction of the vertical support rod 1.

[0039] The support assembly 403 is connected to the translation support platform 4 through a rotating hinge. The bearing housing 11 of the pivot bearing of the test rotor 8 is fixedly connected to the upper plane of the support assembly 403 through bolts. In practice, the test bearing housing 11 can be replaced according to the test requirements.

[0040] AsFigure 5 As shown in the figure, the line connecting the two hinge points of the translational support platform 4 should not be parallel to the line connecting the two hinge points of the horizontal tie rod 3 to avoid the transient structure and endanger the stability of the platform. In this embodiment, let the distance between the rotational hinge axis between the translational support platform 4 and the horizontal guiding link 401 and the rotational hinge axis between the translational support platform 4 and the horizontal loading link 402 be d2, and the distance between the rotational hinge axes at the bottoms of the two vertical support rods 1 of the same parallelogram support structure be d3; the distance between the rotational hinge axis between the translational support platform 4 and the horizontal guiding link 401 and the corresponding vertical support rod 1 be d1. The proportional relationship between d1, d2, and d3 can be set as d1:d2:d3 = 10:31:50. In addition, in order to make the upper plane of the support assembly 403 swing near the horizontal direction to reduce the control difficulty. The upper plane of the support assembly 403 forms a 15° angle with the rotational hinge axis connecting it to the translational support platform 4.

[0041] As Figure 3 shown in the figure, both the first drive unit 6 and the second drive unit 7 adopt hydraulic actuators. In each group of hydraulic actuators, 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 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 through a universal joint, and the other end is connected to the bottom of the translational support platform 4 through a universal joint. One end of the hydraulic actuator of the second drive unit 7 is connected to the horizontal support base 2 through a universal joint, and the other end is connected to the horizontal loading link 402 through a universal joint.

[0043] In practice, the misalignment fault simulation adjustment of the rotor system can be achieved by controlling the overall length of each hydraulic actuator. By setting a certain action mode for the hydraulic actuator, basic displacement or angular excitation can be provided for the rotor system.

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

Claims

1. A device for simulating rotor system pivot misalignment fault and foundation loading, characterized in that: It comprises horizontal mounting platforms, the number of which is the same as the number of the fulcrums of the test rotor (8), and each of the horizontal mounting platforms is used to fix one of the fulcrum bearings of the test rotor (8); Each of the horizontal installation platforms is provided with a misalignment loading module, and each of the misalignment loading modules comprises two groups of parallelogram support structures arranged opposite to each other; each group of parallelogram support structures comprises two vertical support rods (1), and the two vertical support rods (1) are respectively hingedly mounted on the horizontal support base (2), and a horizontal pull rod (3) is hingedly mounted between the two vertical support rods (1), and the horizontal pull rod (3), the horizontal support base (2) and the two vertical support rods (1) together form a parallelogram support structure; the two groups of parallelogram support structures are arranged at intervals along the axial direction of the test rotor (8), and a translation support platform (4) is arranged between the two groups of parallelogram support structures, and the translation support platform (4) is movably mounted between the two groups of parallelogram support structures through a slider (5) mounted on the corresponding vertical support rod (1); the horizontal installation platform is movably mounted on the translation support platform (4) through two hinges perpendicular to the axial direction of the test rotor (8); Each of the misalignment loading modules further comprises a first drive unit (6) and a second drive unit (7); wherein, there are two first drive units (6), one end of each of the two first drive units (6) is fixed to the horizontal support base (2), and the other end of each of the two first drive units (6) is respectively 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 translation 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 support misalignment fault and foundation loading according to claim 1, characterized in that: The translation support platform (4) is arranged with the axial direction of the test rotor (8) as the rotation center and is inclined at an angle of 15° with the horizontal plane.

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

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

5. The device for simulating rotor system support misalignment fault and foundation loading according to claim 1, characterized in that: A bearing seat (11) is provided on each of the translation support platforms (4); the bearing seat (11) is detachably fixed to the translation support platform (4) by means of screws; the bearing seat (11) is used to fix and install a corresponding fulcrum bearing.

6. The device for simulating rotor system support misalignment fault and foundation loading according to claim 5, characterized in that: The translation support platform (4) comprises a horizontal guide link (401) and a horizontal loading link (402) which are arranged parallel to each other, and a support assembly (403) for hingedly mounting the bearing seat (11) is arranged between the horizontal guide link (401) and the horizontal loading link (402); the horizontal guide link (401) is hingedly connected between the two parallelogram support structures via two sliders (5) located on the two parallelogram support structures, and the horizontal loading link (402) is hingedly connected between the two parallelogram support structures via two sliders (5) located on the two parallelogram support structures.

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

8. The device for simulating rotor system support misalignment fault and foundation loading according to claim 1, characterized in that: It also comprises a power unit (12), wherein the power unit (12) is used to drive the test rotor (8) to rotate.

9. The device for simulating rotor system support misalignment fault and foundation loading according to claim 1, characterized in that: The power unit (12) is a servo motor, and the servo motor is drivingly connected to the test rotor (8) via a coupling.

Images