Supporting device, test bed and test installation method

Abstract

The invention relates to the technical field of test bed, and discloses a supporting device, a test bed and a test installation method. The supporting device comprises a mounting platform, a mounting base, a supporting arm, a vibration reduction assembly and a mounting joint. The plurality of mounting seats are arranged on the mounting platform at intervals; one end of each supporting arm is rotatably connected to the mounting seat; the vibration reduction assembly comprises an elastic piece and a connecting piece, the other end of each supporting arm is rotatably connected to the connecting piece, the connecting piece and the mounting platform are arranged at an interval, and the elastic piece is arranged between the connecting piece and the mounting platform and used for supporting the connecting piece; the mounting section is arranged on the supporting arm and is used for connecting a test piece; the device is helpful for reducing the potential safety hazard of the test piece and improving the test efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of test stands, and particularly to a support device, a test stand, and a test installation method. Background Art

[0002] During the development process of an aeroengine, ground tests are an essential and important link. The ground tests of an aeroengine are carried out on a test stand, and the aeroengine is installed and fixed through a main support and an auxiliary support.

[0003] In some related technologies, the auxiliary support uses a drawbar with adjustable length. Two drawbars are symmetrically connected to the aeroengine to produce the effect of rigid support. However, during dynamic tests, this will cause the engine to vibrate excessively, and the vibration value may even be close to the monitoring limit value, posing a relatively large safety hazard.

[0004] Moreover, during installation, it is necessary to adjust the lengths of the two drawbars separately to make the support heights of different auxiliary supports consistent. However, it is often difficult to adjust the support heights of the two drawbars simultaneously, resulting in time-consuming and laborious adjustment and reducing the efficiency of engine tests. Summary of the Invention

[0005] In view of this, the present invention provides a support device, a test stand, and a test installation method to solve the problems of relatively large safety hazards during dynamic tests of test pieces and low test efficiency.

[0006] In a first aspect, the present invention provides a support device, including an installation platform, an installation seat, a support arm, a vibration damping component, and an installation joint; a plurality of the installation seats are arranged on the installation platform at intervals; one end of each of the plurality of support arms is rotatably connected to the installation seat; the vibration damping component includes an elastic member and a connecting member, and the other end of each support arm is rotatably connected to the connecting member. The connecting member and the installation platform are arranged at intervals, and the elastic member is arranged between the connecting member and the installation platform, and the elastic member is used to support the connecting member; the installation joint is arranged on the support arm and is used to connect a test piece.

[0007] Beneficial effects: One end of multiple support arms is connected to their respective corresponding mounting seats, and the other end is connected to the same connecting piece, so that the support device approximately forms a simply supported beam. On the one hand, during the static test, the simply supported beam structure and the auxiliary support of the elastic member under the simply supported beam enable the support device to provide better rigid support for the test piece; on the other hand, during the dynamic experiment, the support arm vibrates under the force of the test piece, and the vibration is amplified by the lever effect of the support arm and acts on the connecting piece. The elastic member can act on the connecting piece at this time to produce a buffering and vibration absorption effect, thereby suppressing the vibration of the test piece and improving the safety of the test; and since multiple support arms are connected to the same connecting piece, the positions of multiple installation sections can be adjusted synchronously during assembly to ensure the position consistency of the installation sections, improve assembly efficiency, and thus improve test efficiency.

[0008] In an optional embodiment, the vibration damping assembly further includes a guide column, the guide column is inserted into the mounting platform, and the elastic member and the connecting member are sleeved on the guide column.

[0009] Beneficial effects: The guide column guides the connecting part, constrains the vibration direction of the connecting part, and allows the elastic part to expand and contract only along the axial direction of the guide column, thereby protecting the elastic part and making the vibration reduction effect of the elastic part more stable.

[0010] In an optional embodiment, the vibration damping assembly also includes a first spacer and a locking nut, the first spacer is mounted on the guide column and is located between the connecting member and the elastic member, the guide column includes a first step, the first step is used to limit the first spacer, and the locking nut presses the connecting member against the first spacer.

[0011] Beneficial effect: The guide post and the connector are fixed together under the action of the locking nut, so that the guide post vibrates in the axial direction following the connector, which on the one hand avoids collision between the connector and the guide post, and on the other hand avoids accidental separation of the connector from the guide post.

[0012] In an optional embodiment, the vibration damping assembly also includes a second spacer, which is fixed on the mounting platform, and the guide column can be movably inserted in the second spacer, and the two ends of the elastic member respectively abut the first spacer and the second spacer; wherein, the guide column also includes a second step, and the second step is located on the side of the second spacer away from the elastic member, and the second step is used to limit the second spacer.

[0013] Beneficial effects: The acting force is applied to the elastic member through the first spacer sleeve and the second spacer sleeve, which can make the force on the elastic member more uniform and produce a better vibration damping effect. At the same time, the second spacer sleeve is fixed on the mounting platform, and the axial travel of the guide post is restricted through the interaction with the second step, which can also prevent the guide post from accidentally disengaging from the mounting platform due to excessive amplitude.

[0014] In an alternative embodiment, the first spacer sleeve includes a first positioning groove, the second spacer sleeve includes a second positioning groove, and both ends of the elastic member are respectively embedded in the first positioning groove and the second positioning groove.

[0015] Beneficial effects: The first positioning groove and the second positioning groove play a positioning effect on the elastic member, preventing the elastic member from shifting in position during the telescoping process.

[0016] In an alternative embodiment, the connecting member includes a first connecting shaft, the support arm is sleeved on the first connecting shaft, and the support arm and the first connecting shaft are in clearance fit.

[0017] Beneficial effects: The support arm is connected to the connecting member through the first connecting shaft, so as to realize rotation relative to the connecting member during vibration.

[0018] In an alternative embodiment, it further includes a first spherical plain bearing and a second connecting shaft. The first spherical plain bearing is arranged on the mounting seat, the second connecting shaft is passed through the first spherical plain bearing, and the support arm is sleeved on the second connecting shaft.

[0019] Beneficial effects: The support arm is connected to the mounting seat through the second connecting shaft, so as to realize rotation relative to the mounting seat during vibration. The first spherical plain bearing can increase the rotational freedom of the support arm, allowing there to be a certain angle between the axis of the support arm and the axis of the second connecting shaft, thereby being able to compensate for assembly errors.

[0020] In an alternative embodiment, it further includes a second spherical plain bearing and a third connecting shaft. The third connecting shaft is passed through the support arm, the second spherical plain bearing is sleeved on the third connecting shaft, and the mounting section is arranged on the second spherical plain bearing.

[0021] Beneficial effects: The second spherical plain bearing can increase the rotational freedom of the mounting section, absorb vibrations in other directions during the operation of the test piece, ensure that the acting force on the support arm is perpendicular to the rotation axis of the support arm, ensure that the support arm can move flexibly during the vibration process, and improve the vibration absorption effect of the support device.

[0022] Second aspect, the present invention further provides a test stand, which includes a stand, a main support and an auxiliary support; the main support is arranged on the stand and is used to support the engine; the auxiliary support includes the support device provided by the present invention, and the auxiliary support is arranged on the stand and is used to support the engine.

[0023] Beneficial effects: The test stand includes the support device provided by the present invention, so it correspondingly has the beneficial effects brought by the support device, which will not be elaborated here.

[0024] Third aspect, the present invention further provides a test installation method, the test installation method uses the test stand provided by the present invention, and the test installation method includes: installing the main support and the auxiliary support on the stand; installing the engine on the main support and the auxiliary support.

[0025] Beneficial effects: The test installation method uses the test stand provided by the present invention, so it correspondingly has the beneficial effects brought by the support device, which will not be elaborated here. Description of the Drawings

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a three-dimensional structure schematic diagram of a support device according to an embodiment of the present invention;

[0028] Figure 2 It is a front view structure schematic diagram of a support device according to an embodiment of the present invention;

[0029] Figure 3 It is a top view structure schematic diagram of a support device according to an embodiment of the present invention;

[0030] Figure 4 For Figure 2 It is a cross-sectional view of the A-A section in

[0031] Figure 5 For Figure 2 It is a cross-sectional view of the B-B section in

[0032] Figure 6 For Figure 2 It is a cross-sectional view of the C-C section in

[0033] Description of the reference numerals:

[0034] 1. Installation platform; 2. Mounting base; 3. Support arm; 301. First support arm; 302. Second support arm; 4. Vibration damping component; 401. Elastic member; 402. Connecting member; 4021. First connecting shaft; 404. Guide post; 4041. First step; 4042. Second step; 405. Locking nut; 406. First spacer sleeve; 407. Second spacer sleeve; 501. First spherical plain bearing; 502. Second spherical plain bearing; 601. Second connecting shaft; 602. Third connecting shaft; 7. Mounting joint; 8. Base; 801. First mounting groove; 9. Support column. Detailed implementation manner

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an" as used herein may also include the plural. The terms "comprising", "including" and "having" are inclusive and thus specify the presence of stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.

[0037] Although the terms first, second, etc. may be used herein to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used herein. Additionally, in the description of the present invention, unless otherwise clearly defined and limited, the terms "arranged", "connected" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "end", "length", "inner", "outer", etc. Such spatial relative relationship terms are intended to include different orientations of the mechanism during use or operation in addition to the orientations depicted in the figure. For example, if the mechanism in the figure is flipped, an element described as "under other elements or features" or "below other elements or features" will then be oriented as "above other elements or features" or "over other elements or features". Thus, the exemplary term "under" can include both upper and lower orientations. The mechanism can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0039] The ground test of an aeroengine is carried out on a test bed, and the aeroengine is installed and fixed through a main support and an auxiliary support. In some related technologies, the auxiliary support adopts two symmetrically arranged tie rods, and the tie rods are rigidly connected and support the aeroengine (or other test pieces) to meet the fixing requirements of the aeroengine during static tests.

[0040] However, during dynamic tests, the rigid support makes it difficult to absorb the vibration of the test piece, and the test piece is prone to generate excessive amplitudes, resulting in potential safety hazards. Moreover, during assembly, it is generally required that the two auxiliary support positions of the test piece (i.e., the parts where the test piece is connected to the tie rods) are at the same horizontal height. In related technologies, the lengths of the two tie rods are adjusted separately, which is time-consuming and laborious, reducing the efficiency of engine tests.

[0041] The following will describe embodiments of the present invention in conjunction with Figures 1 to 6 ,

[0042] Referring to Figure 1 , Figure 2 , Figure 3 , according to an embodiment of the present invention, on the one hand, a support device is provided, which includes an installation platform 1, an installation seat 2, a support arm 3, a vibration damping assembly 4, and an installation joint 7.

[0043] A plurality of installation seats 2 are arranged on the installation platform 1 at intervals. One end of each of the plurality of support arms 3 is rotatably connected to the installation seat 2. The vibration damping assembly 4 includes an elastic member 401 and a connecting member 402. The other end of each support arm 3 is rotatably connected to the connecting member 402. The connecting member 402 and the installation platform 1 are arranged at intervals. The elastic member 401 is arranged between the connecting member 402 and the installation platform 1, and the elastic member 401 is used to support the connecting member 402. The installation joint 7 is arranged on the support arm 3 and is used to connect the test piece.

[0044] One end of each of the multiple support arms 3 is connected to the respective corresponding mounting base 2, and the other end is connected to the same connecting member 402, such that the support device approximately forms a simply supported beam. On the one hand, during the static test, the simply supported beam structure and the auxiliary support of the elastic member 401 below the simply supported beam enable the support device to provide a good rigid support for the test piece; on the other hand, during the dynamic experiment, the support arm 3 vibrates under the action of the test piece, and the vibration acts on the connecting member 402 after being amplified by the lever effect of the support arm 3. The elastic member 401 can act on the connecting member 402 at this time, producing a buffering and vibration damping effect, thereby suppressing the vibration of the test piece and improving the safety of the test.

[0045] Moreover, since the multiple support arms 3 are connected to the same connecting member 402, the positions of the multiple mounting joints 7 can be adjusted synchronously during assembly, ensuring the position consistency of the mounting joints 7, improving the assembly efficiency, and further improving the test efficiency.

[0046] Therefore, the support device helps to reduce the safety hazards of the test piece and improve the test efficiency.

[0047] Exemplarily, in Figure 1 、 Figure 2 、 Figure 3 In the illustrated embodiment, the support device has two mounting bases 2, the support arms 3 are divided into two groups (including the first support arm 301 and the second support arm 302), the two groups of support arms 3 and the mounting bases 2 correspond one by one, and are respectively connected between the corresponding mounting bases 2 and the connecting member 402, and the two groups of support arms 3 are arranged in the same plane (in other words, the axes of the two groups of support arms 3 are parallel to each other). At this time, the support device provides two auxiliary support points for the test piece, meeting the support requirements of most test pieces. At the same time, the support device approximately forms a standard simply supported beam structure with two fulcrums, providing rigid support in the static test and generating a suitable amplitude in the dynamic test to meet the requirements of flexible vibration damping.

[0048] Moreover, in order to keep the adjustment range of the mounting joints 7 consistent, in some embodiments, the lengths of the two groups of support arms 3 (specifically, the distance between the two axes at both ends of the support arm 3) are the same, and the distances from the connection positions of the two mounting joints 7 and the support arms 3 to the corresponding mounting bases 2 are the same. Thus, when the connecting member 402 moves, the movement amplitudes of the two mounting joints 7 are kept consistent.

[0049] Of course, in some other embodiments not shown, the lengths of the support arms 3 may also be different. At this time, using the scaling principle of the lever, by adjusting the installation positions of the two mounting joints 7 on their respective support arms 3, it is also possible to keep the movement amplitudes of the two mounting joints 7 consistent when the connecting member 402 moves. However, at this time, the connecting member 402 is not at the central part of the simply supported beam, and there are differences in the force arms formed by the first support arm 301 and the second support arm 302, and there may be deviations in the vibration damping effects of the mounting joints 7 on both sides. Moreover, as the number of the mounting seats 2 and the support arms 3 further increases, the complexity of the assembly will increase rapidly.

[0050] In some embodiments, with reference to Figure 4 , the vibration damping assembly 4 further includes a guide post 404. The guide post 404 is inserted into the mounting platform 1, and the elastic member 401 and the connecting member 402 are sleeved on the guide post 404. The guide post 404 plays a guiding role for the connecting member 402, restricts the vibration direction of the connecting member 402, and enables the elastic member 401 to only expand and contract along the axial direction of the guide post 404. While protecting the elastic member 401, it also makes the vibration damping effect of the elastic member 401 more stable.

[0051] Optionally, the guide post 404 can be fixed to the mounting platform 1, and the connecting member 402 moves along the guide post 404, or the guide post 404 can also be fixed together with the connecting member 402, and the guide post 404 moves axially relative to the mounting platform 1.

[0052] Exemplarily, in some embodiments, the vibration damping assembly 4 further includes a first spacer sleeve 406 and a locking nut 405. The first spacer sleeve 406 is sleeved on the guide post 404 and is located between the connecting member 402 and the elastic member 401. The guide post 404 includes a first step 4041 for limiting the first spacer sleeve 406, and the locking nut 405 presses the connecting member 402 against the first spacer sleeve 406. The guide post 404 and the connecting member 402 are fixed together under the action of the locking nut 405, so that the guide post 404 vibrates axially following the connecting member 402. On the one hand, it avoids the collision between the connecting member 402 and the guide post 404, and on the other hand, it also avoids the accidental detachment of the connecting member 402 from the guide post 404.

[0053] Optionally, in some embodiments, the elastic member 401 can use a compression spring, and the compression spring is also sleeved on the guide post 404. The guide post 404 plays a guiding role for the expansion and contraction of the compression spring and at the same time restricts the radial offset of the compression spring. The compression spring can use a high-rigidity die spring, etc., which helps to effectively absorb the energy released by the vibration of a large-mass test piece.

[0054] In some embodiments, the vibration damping assembly 4 further includes a second spacer 407, which is fixed to the mounting platform 1. The guide post 404 is movably inserted into the second spacer 407, and the ends of the elastic member 401 abut against the first spacer 406 and the second spacer 407, respectively. The force applied to the elastic member 401 through the first spacer 406 and the second spacer 407 can make the force on the elastic member 401 more uniform, resulting in a better vibration damping effect. Optionally, the material of the second spacer 407 can be a bearing alloy (e.g., babbitt metal) to make the relative movement between the second spacer 407 and the guide post 404 smoother.

[0055] For example, referring to Figure 3 The second spacer 407 is set on the mounting platform 1 through a fastener. When viewed from the axial direction, the installation position of the fastener is staggered with the support arm 3 and the first spacer 406 to facilitate the installation operation of the fastener.

[0056] Furthermore, the guide post 404 may further include a second step 4042, which is located on a side of the second spacer 407 facing away from the elastic member 401. The second step 4042 is used to limit the position of the second spacer 407. The second spacer 407 is fixed to the mounting platform 1, and the interaction with the second step 4042 limits the axial travel of the guide post 404, thereby preventing the guide post 404 from accidentally detaching from the mounting platform 1 due to excessive amplitude.

[0057] In some embodiments, the outer diameter of the second step 4042 is greater than the outer diameter of the first step 4041, the minimum inner diameter of the second spacer 407 is greater than the outer diameter of the first step 4041 and smaller than the outer diameter of the second step 4042, and the minimum inner diameter of the first spacer 406 is smaller than the outer diameter of the first step 4041, thereby meeting the assembly requirements of the vibration damping assembly 4.

[0058] In some embodiments, a through hole may be provided on the mounting platform 1, and the second spacer 407 is embedded in the through hole with a clearance fit or a transition fit to locate the position of the vibration reduction assembly 4, and then the mounting base 2 is assembled based on the position of the vibration reduction assembly 4.

[0059] In some embodiments, the first spacer 406 further includes a first positioning groove, and the second spacer 407 includes a second positioning groove. The ends of the elastic member 401 are respectively embedded in the first positioning groove and the second positioning groove. The first and second positioning grooves position the elastic member 401, preventing the elastic member 401 from shifting during the expansion and contraction process.

[0060] In some embodiments, the connecting member 402 includes a first connecting shaft 4021, and the support arm 3 is sleeved on the first connecting shaft 4021, and the support arm 3 and the first connecting shaft 4021 are in clearance fit. The support arm 3 is connected to the connecting member 402 through the first connecting shaft 4021, so as to realize rotation relative to the connecting member 402 during vibration.

[0061] Referring to Figure 4 , exemplarily, the first support arm 301 and the second support arm 302 are sleeved on the same first connecting shaft 4021, so that the rotational freedom of the connecting member 402 along the axial direction of the first connecting shaft 4021 is not restricted, and thus it is smoother during vibration.

[0062] In some embodiments, referring to Figure 5 , the support device further includes a first spherical plain bearing 501 and a second connecting shaft 601. The first spherical plain bearing 501 is arranged on the mounting base 2, the second connecting shaft 601 is passed through the first spherical plain bearing 501, and the support arm 3 is sleeved on the second connecting shaft 601.

[0063] The support arm 3 is connected to the mounting base 2 through the second connecting shaft 601, so as to realize rotation relative to the mounting base 2 during vibration. The first spherical plain bearing 501 can increase the rotational freedom of the support arm 3 and allow a certain angle between the axis of the support arm 3 and the axis of the second connecting shaft 601, so as to compensate for assembly errors.

[0064] Similarly, in some embodiments, referring to Figure 6 , the support device further includes a second spherical plain bearing 502 and a third connecting shaft 602. The third connecting shaft 602 is passed through the support arm 3, the second spherical plain bearing 502 is sleeved on the third connecting shaft 602, and the mounting joint 7 is arranged on the second spherical plain bearing 502.

[0065] The second spherical plain bearing 502 can increase the rotational freedom of the mounting joint 7, absorb vibrations in other directions during the operation of the test piece, ensure that the force received by the support arm 3 is perpendicular to the rotation axis of the support arm 3, ensure that the support arm 3 can move flexibly during vibration, and improve the vibration absorption effect of the support device.

[0066] Returning to Figure 1 , in some embodiments, the mounting joint 7 is fixedly connected to the test piece through at least two mounting parts, so as to more accurately locate the position of the mounting joint 7 and ensure the mounting accuracy.

[0067] In some embodiments, each set of support arms 3 includes two support arms 3. The second connecting shaft 601 penetrates through the mounting base 2. The two support arms 3 of the same set are respectively located on both sides of the mounting base 2 and sleeved on both ends of the second connecting shaft 601. Two first connecting shafts 4021 are symmetrically arranged on the connecting member 402, and the two support arms 3 of the same set are respectively sleeved on the first connecting shafts 4021 on the same side. By adopting a symmetric design, it helps to eliminate the torque exerted by the support arms 3 on the connecting member 402, enabling the connecting member 402 to move more smoothly.

[0068] In some embodiments, correspondingly, the third connecting shaft 602 is connected between the two support arms 3 of the same set, and the mounting joint 7 is located between the two support arms 3 of the same set.

[0069] In some embodiments, the support device further includes a base 8 and a support column 9. The support column 9 is arranged on the base 8, and the mounting platform 1 is arranged on the support column 9. The base 8 is provided with a first mounting groove 801, and the base 8 is mounted on the bench of the test stand through the first mounting groove 801. The extending direction of the first mounting groove 801 is perpendicular to the connection line of the two mounting bases 2. Through the first mounting groove 801, the position of the mounting base 2 can be conveniently adjusted so that the mounting joint 7 can be better connected to the test piece.

[0070] In some embodiments, the mounting platform 1 is provided with a second mounting groove. The extending direction of the second mounting groove is parallel to the connection line of the two mounting bases 2, and the mounting base 2 is mounted on the mounting platform 1 through the second mounting groove. Through the second mounting groove, the position of the mounting base 2 can be conveniently adjusted so that the two mounting bases 2 are symmetrically arranged with respect to the vertical plane passing through the center of the test piece, ensuring the consistency of the support effect of the two mounting joints 7 on the test piece.

[0071] In some embodiments, the support column 9 can be lifted and lowered (for example, using a hydraulic rod as the support column 9) so that the position of the mounting platform 1 is adjustable to meet the support requirements of test pieces of different specifications.

[0072] In a second aspect, the present invention also provides a test stand, including a bench, a main support, and an auxiliary support; the main support is arranged on the bench and is used to support the engine; the auxiliary support includes the support device provided by the present invention. The auxiliary support is arranged on the bench and is used to support the engine.

[0073] The test stand includes the support device provided by the present invention, and thus correspondingly has the beneficial effects brought by the support device, which will not be elaborated here. The main support of the test stand can refer to the conventional main support design in the related art, which will not be elaborated here.

[0074] In a third aspect, the present invention also provides a test installation method. The test installation method uses the test stand provided by the present invention, and the test installation method includes the following steps:

[0075] Step S110: Install the main support and the auxiliary support on the test bench.

[0076] Step S120: Install the engine on the main support and the auxiliary support.

[0077] The commissioning installation method uses the test bench provided by the present invention, and thus correspondingly has the beneficial effects brought by the support device, which will not be elaborated here.

[0078] In some embodiments, step S110 further includes: determining the specifications of the elastic member 401.

[0079] In some embodiments, the specifications of the elastic member 401 include the stiffness coefficient of the elastic member 401. Exemplarily, first, a simulation test is performed on the engine in a rigid support state to obtain the maximum amplitude of the engine; next, according to the maximum amplitude of the engine and the parameters of the engine (mass, center of gravity, etc.), the maximum energy of vibration is determined, and the stiffness coefficient of the elastic member 401 is determined according to the maximum amplitude and the maximum energy, so that the performance of the elastic member 401 meets the vibration absorption requirements.

[0080] In some embodiments, the specifications of the elastic member 401 further include the height of the elastic member 401 in the free state (the state without external force). Exemplarily, in the free state, the axis of the assembled support arm 3 is along the horizontal direction, and the height of the elastic member 401 in the free state is equal to the height of the space below the connecting member 402. Thus, in the free state, the elastic member 401 theoretically does not exert a force on the connecting member 402 while contacting the first spacer 406 (in the embodiments without the first spacer 406, it contacts the connecting member 402). After the engine is installed, the elastic member 401 exerts a force on the connecting member 402, supports the connecting member 402 in the static test, and plays a vibration absorption effect in the dynamic experiment.

[0081] In some embodiments, step S110 further includes: setting the installation platform 1 on the test bench; setting the vibration damping assembly 4 on the installation platform 1; setting the mounting seat 2, the support arm 3, and the mounting joint 7 with the vibration damping assembly 4 as a reference.

[0082] In some embodiments, step S110 further includes: adjusting the position of the base 8 so that the center of the connecting member 402 and the center of the engine are in the same vertical plane. By adjusting the position of the vibration damping assembly 4 and then setting the mounting seat 2 with the vibration damping assembly 4 as a reference, it helps to ensure the symmetry relationship of the mounting seat 2 and guarantee the consistency of the supporting forces of different mounting joints 7 on the engine.

[0083] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A support device, characterized in that, include: Mounting platform (1); A plurality of mounting seats (2) are arranged at intervals on the mounting platform (1); A plurality of support arms (3), one end of which is rotatably connected to the mounting seat (2); A vibration reduction assembly (4) comprising an elastic member (401) and a connecting member (402), wherein the other end of each support arm (3) is rotatably connected to the connecting member (402), the connecting member (402) and the mounting platform (1) are spaced apart, the elastic member (401) is disposed between the connecting member (402) and the mounting platform (1), and the elastic member (401) is used to support the connecting member (402); The mounting section (7) is arranged on the support arm (3) and is used for connecting the test piece.

2. The support device according to claim 1, characterized in that, The vibration reduction assembly (4) further comprises a guide column (404), wherein the guide column (404) is inserted into the mounting platform (1), and the elastic member (401) and the connecting member (402) are sleeved on the guide column (404).

3. The support device according to claim 2, wherein The vibration damping assembly (4) further includes a first spacer (406) and a locking nut (405), wherein the first spacer (406) is sleeved on the guide column (404) and is located between the connecting member (402) and the elastic member (401), and the guide column (404) includes a first step (4041), wherein the first step (4041) is used to limit the first spacer (406), and the locking nut (405) presses the connecting member (402) against the first spacer (406).

4. The support device according to claim 3, wherein, The vibration reduction assembly (4) further includes a second spacer (407), the second spacer (407) being fixed on the mounting platform (1), the guide column (404) being movably inserted into the second spacer (407), and the two ends of the elastic member (401) respectively abutting against the first spacer (406) and the second spacer (407); Wherein, the guide column (404) further includes a second step (4042), the second step (4042) is located on the side of the second spacer (407) away from the elastic member (401), and the second step (4042) is used to limit the second spacer (407).

5. The support device according to claim 4, characterized in that, The first spacer (406) includes a first positioning groove, the second spacer (407) includes a second positioning groove, and both ends of the elastic member (401) are respectively embedded in the first positioning groove and the second positioning groove.

6. The support device according to claim 1, characterized in that, The connecting member (402) comprises a first connecting shaft (4021), the support arm (3) is sleeved on the first connecting shaft (4021), and the support arm (3) and the first connecting shaft (4021) are clearance-fitted.

7. The support device according to claim 1, wherein It also includes a first joint bearing (501) and a second connecting shaft (601), wherein the first joint bearing (501) is arranged on the mounting seat (2), the second connecting shaft (601) is passed through the first joint bearing (501), and the support arm (3) is sleeved on the second connecting shaft (601).

8. The support device according to claim 1, characterized in that, It further includes a second spherical plain bearing (502) and a third connecting shaft (602). The third connecting shaft (602) is arranged through the support arm (3), the second spherical plain bearing (502) is sleeved on the third connecting shaft (602), and the mounting section (7) is arranged on the second spherical plain bearing (502).

9. A test stand, characterized in that, Comprising: A test bench; A main support arranged on the test bench for supporting the engine; An auxiliary support comprising the support device according to any one of claims 1 to 8. The auxiliary support is arranged on the test bench and is used for supporting the engine.

10. A test run installation method, characterized in that The engine test installation method uses the test bench according to claim 9. The engine test installation method includes: Installing the main support and the auxiliary support on the test bench; Installing the engine on the main support and the auxiliary support.

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