CN115389200A - An elastic foil air dynamic pressure thrust bearing performance testing bench - Google Patents

Abstract

The application provides an elastic foil aerodynamic dynamic pressure thrust bearing performance detection bench, belongs to the technical field of bearing testing, and particularly comprises a workbench, a driving piece, a thrust disc, a test shaft, a radial hydrostatic bearing, a foil mounting disc, a loading assembly, an impact simulation assembly and a measurement assembly; the thrust disc is horizontally arranged on the output end of the driving piece; the device comprises a radial hydrostatic bearing, a test shaft, a foil mounting disc, a collision simulation assembly, a loading assembly, a measuring assembly and a test platform, wherein the radial hydrostatic bearing is fixedly mounted on the workbench; the loading assembly provides changeable loading force for the test shaft, the impact simulation assembly controls the test shaft to accelerate to move towards the thrust disc, and the measuring assembly measures the states of the thrust disc and the foil mounting disc. Through the processing scheme of the application, the comprehensiveness of the performance detection of the aerodynamic dynamic pressure thrust bearing of the elastic foil is improved.

Description

An elastic foil air dynamic pressure thrust bearing performance testing platform

technical field

The present application relates to the field of bearing testing, in particular to an elastic foil air dynamic pressure thrust bearing performance testing platform.

Background technique

Resilient foil aerodynamic thrust bearings are foil bearing constructions that are formed with multiple pieces of metal foil in the bearing body. Elastic foil air dynamic pressure thrust bearing is a kind of dynamic pressure bearing that uses the gas in the surrounding environment as a lubricant and uses foil as an elastic supporting element. The main types are cantilever type, winding type, corrugated foil type and external wedge type, etc. One end of the foil of the thrust bearing is embedded in the foil mounting plate, and the other end freely overlaps with the adjacent foil, so that multiple wedge-shaped gaps are formed between the foil mounting plate and the thrust plate. When rotating, a load-bearing air film is formed between the two discs. Existing testing institutions for elastic foil aerodynamic pressure thrust bearings are not comprehensive enough.

Contents of the invention

In view of this, the application provides an elastic foil aerodynamic pressure thrust bearing performance testing platform, which solves the problems in the prior art, and can test the performance of the elastic foil aerodynamic pressure thrust bearing on a test device More comprehensive testing.

An elastic foil aerodynamic pressure thrust bearing performance testing platform provided by this application adopts the following technical scheme:

An elastic foil aerodynamic pressure thrust bearing performance testing platform, including a workbench, a driving part, a thrust plate, a test shaft, a radial static pressure bearing, a foil mounting plate, a loading component, an impact simulation component and a measurement component ;

The driving part is fixed on the workbench, and the thrust plate is installed horizontally on the output end of the drive part; the radial hydrostatic bearing is fixedly installed on the workbench, and the test shaft Installed in the radial static pressure bearing, the two ends of the test shaft protrude from the radial static pressure bearing, the bottom end of the test shaft is connected to the foil mounting plate, and the test shaft is connected to the An impact simulation component, the loading component is fixed on the test shaft, and the measurement component is installed on the workbench;

Wherein, the thrust plate, the test shaft, the radial static pressure bearing and the foil mounting plate are arranged coaxially, the loading assembly provides a variable loading force for the test shaft, and the impact simulation assembly controls the test The shaft is accelerated towards the thrust plate and the measurement assembly measures the state of the thrust plate and foil mounting plate.

Optionally, the loading assembly includes ring-shaped gravity blocks of various quality specifications, at least one ring-shaped gravity block is fixedly installed on the test shaft, and the ring-shaped gravity block surrounds all the ring-shaped gravity blocks above the radial static pressure bearing. The outer circumference of the test shaft.

Optionally, a radially protruding protrusion is provided on the outer circumference of the test shaft above the radial static pressure bearing, the bottom end surface of the annular gravity block abuts against the protrusion, and the loading assembly also A compression nut is included, the compression nut is located above the ring-shaped gravity block, and the compression nut is threadedly connected with the test shaft to press the ring-shaped gravity block on the protrusion.

Optionally, the impact simulation component includes a control component and a cable connected to the top end of the test shaft, the other end of the cable extends vertically upwards and is connected to the control component, and the control component tightens or loosens the Cables to control the ascent or descent of the test shaft.

Optionally, the control assembly includes a portal bracket, a plurality of guide wheels, an electromagnet, and an iron magnet. The portal bracket is installed on the workbench, and the iron magnet is connected to the other end of the cable. The electromagnet is installed on the outside of the side frame of the portal bracket, and a plurality of the guide wheels are installed parallel to each other on the top frame of the portal bracket, and the cable extends vertically upwards and passes through the first guide wheel After turning, it passes through the other guide wheels and extends to the edge of the top frame of the gantry bracket, and then extends downward until the iron magnet contacts the electromagnet.

Optionally, the control assembly further includes a telescopic rod, at least one of the guide wheels is installed on the portal bracket through the telescopic rod, and the telescopic rod telescopically drives the guide wheel mounted on the telescopic rod to Move vertically.

Optionally, the measuring assembly includes a measuring ring, the measuring ring surrounds the outer circumference of the thrust plate, the measuring ring is fixed on the workbench, and a sensor is installed on the measuring ring.

Optionally, the measurement assembly includes a torsion bar and a torsion measurement mechanism, the torsion measurement mechanism includes a support frame, a U-shaped pin, a connecting rod, a torque sensor and a counterweight assembly, and the support frame is fixed on the workbench , the connecting rod is horizontally and axially slidably installed on the support frame, one end of the connecting rod is connected to the torque sensor, the torque sensor is fixed on the workbench, the other end of the connecting rod Connect the counterweight assembly, the U-shaped rotating pin is installed on the connecting rod, the axial direction of the U-shaped rotating pin is perpendicular to the axial direction of the connecting rod, and one end of the torsion bar is connected to the foil mounting plate and the torsion bar extends along the radial direction of the foil mounting plate, and the torsion bar is placed in the bar-shaped groove of the U-shaped rotating pin.

Optionally, the support frame is provided with a horizontal through hole, the connecting rod passes through the through hole, and the connecting rod slides in the through hole, and the counterweight assembly includes a counterweight rope, a counterweight Weight and guide wheel assembly, one end of the connecting rod is connected to the torque sensor through the adjustment sleeve, the other end of the connecting rod is connected to one end of the weight rope, and the weight rope is along the axis of the connecting rod The direction extends through the guide wheel assembly and turns upwards and then downwards, and the other end of the counterweight rope is connected to the counterweight.

In summary, the application includes the following beneficial technical effects:

1. This application is used to test the static performance and dynamic performance of the elastic foil type aerodynamic pressure thrust bearing.

2. The loading force and floating speed of this application are adjustable, which can simulate and detect the response process of the thrust bearing after being disturbed by impact.

3. This application has high measurement accuracy, rich types of measured parameters, and easy integration and extraction of data.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the overall structure schematic diagram of the test bench of the present application;

Fig. 2 is a schematic structural view of the motor, the thrust plate and the measuring ring of the embodiment of the present application;

Fig. 3 is the structural representation of the application test shaft and thrust plate installation;

Fig. 4 is the structural representation of torsion bar and torsion measuring mechanism of the present application;

Fig. 5 is a structural schematic diagram of the portal bracket and the telescopic rod of the present application.

Explanation of reference numerals: 1. driving part; 11. workbench; 12. portal support; 15. displacement sensor; 16. temperature sensor; 17. rotational speed sensor; 18. torsion bar; 19. torque measuring mechanism; Sensor; 1902, fixed frame; 1903, adjustment sleeve; 1904, U-shaped pin; 1905, support frame; 1906, guide wheel assembly; 1907, counterweight rope; 1908, connecting rod; 1909, counterweight block; 2, stop Push plate; 21, mounting frame; 22, measuring ring; 3, foil mounting plate; 4, radial static pressure bearing; 5, test shaft; 6, annular gravity block; 601, compression nut; 7, cable; 8 , telescopic rod; 81, guide wheel; 9, iron absorption; 10, electromagnet; 20, bottom plate.

Detailed ways

Embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

Embodiments of the present application are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. The present application can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It is noted that the following describes various aspects of the embodiments that are within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is illustrative only. Based on the present application one skilled in the art should appreciate that an aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, any number of the aspects set forth herein can be used to implement an apparatus and/or practice a method. In addition, such an apparatus may be implemented and/or such a method practiced using other structure and/or functionality than one or more of the aspects set forth herein.

It should also be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic idea of the application, and only the components related to the application are shown in the drawings rather than the number, shape and number of components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed at will during actual implementation, and the layout of the components may also be more complicated.

Additionally, in the following description, specific details are provided to facilitate a thorough understanding of examples. However, it will be understood by those skilled in the art that the described aspects may be practiced without these specific details.

An embodiment of the present application provides a performance testing platform of an elastic foil aerodynamic pressure thrust bearing.

As shown in Figures 1 to 3, an elastic foil air dynamic pressure thrust bearing performance testing platform includes a workbench 11, a driving part 1, a thrust plate 2, a test shaft 5, a radial static pressure bearing 4, Foil mounting plate 3, loading assembly, impact simulation assembly and measurement assembly.

The driving part 1 is fixed on the workbench 11, and the workbench 11 is a marble platform, and the thrust plate 2 is installed horizontally on the output end of the drive part 1; the radial hydrostatic bearing 4 is installed on the workbench On the bottom plate 20 of 11, the test shaft 5 is installed in the radial hydrostatic bearing 4, the two ends of the test shaft 5 protrude from the radial hydrostatic bearing 4, and the bottom end of the test shaft 5 The foil mounting plate 3 is connected, the test shaft 5 is connected to the impact simulation assembly, the loading assembly is fixed on the test shaft 5 , and the measurement assembly is installed on the workbench 11 .

Wherein, the thrust plate 2, the test shaft 5, the radial hydrostatic bearing 4 and the foil mounting disc 3 are coaxially arranged, the loading assembly provides a variable loading force for the test shaft 5, and the impact simulation The assembly controls the acceleration of the test shaft 5 towards the thrust plate 2 and the measurement assembly measures the state of the thrust plate 2 and foil mounting plate 3 .

The driving part 1 of the present application is a motor, the output shaft of the motor is connected to the thrust plate 2, the motor is started, and the motor drives the thrust plate 2 to rotate. This application adopts the method that the thrust plate 2 moves and the foil does not move. The motor drives the thrust plate 2 to provide the relative speed between the thrust plate 2 and the foil mounting plate 3 from 0 to 90000 rpm to generate the thrust plate 2. The air film with bearing capacity between the foil mounting plate 3 changes the floating speed by controlling the speed of the motor.

The radial static pressure bearing 4 is installed on the workbench 11 through the mounting frame 21 , and the application uses the radial static pressure bearing 4 to limit the movement and large tilt in the radial direction (horizontal, front and rear). Only the test shaft 5 is allowed to move up and down in the vertical direction, and the test shaft 5 and the radial static pressure bearing 4 are lubricated by an external air source to reduce the friction when the test shaft 5 moves in the vertical direction.

The measurement assembly of the embodiment of the present application may include a displacement sensor 15, a temperature sensor 16, and a rotational speed sensor 17, and the displacement sensor 15, the temperature sensor 16, and the rotational speed sensor 17 respectively measure the dynamic and static distance between the thrust plate 2 and the foil mounting plate 3, the air pressure The membrane airflow temperature and relative rotational speed were measured. The displacement sensor 15 adopts an eddy current sensor, which is a non-contact sensor, and is evenly distributed on three circumferences, and can measure the distance between the end face of the foil mounting plate 3 and the end face of the thrust plate 2 and the pitch and tilt angle.

The measuring assembly also includes a measuring ring 22, which surrounds the outer periphery of the thrust plate 2, and the measuring ring 22 is fixed on the workbench 11 through a bracket, and the upper end surface of the measuring ring 22 is in contact with the thrust plate 2. The upper end surfaces of the disk 2 are parallel, and each sensor is installed on the measuring ring 22 .

The loading assembly includes a variety of ring-shaped gravity blocks 6 of different quality specifications, at least one ring-shaped gravity block 6 is fixedly installed on the test shaft 5, and the ring-shaped gravity block 6 surrounds the radial static pressure bearing 4 The outer circumference of the test shaft 5. On the outer periphery of the test shaft 5 above the radial static pressure bearing 4, radially protruding protrusions are provided, and the test shaft 5 is set as a step shaft, the step shaft is thinner at the top and thicker at the bottom, and a protrusion is formed at the step. The bottom end surface of the annular gravity block 6 abuts against the protrusion, and the loading assembly further includes a compression nut 601, the compression nut 601 is located above the annular gravity block 6, and the compression nut 601 communicates with the The test shaft 5 is threaded to press the ring-shaped gravity block 6 on the protrusion, and the ring-shaped gravity block 6 is a standard weight for precision machining and measurement, which can be converted into standard gravity. Installing different annular gravity blocks 6 can change the loading force.

The impact simulation component accelerates the test shaft 5 and the foil mounting plate 3 toward the thrust plate 2 to simulate the impact disturbance of the thrust bearing during operation, so as to detect the response process of the thrust bearing after the impact disturbance.

As shown in Figures 1 and 5, the impact simulation assembly includes a control assembly and a cable 7 connected to the top of the test shaft 5, and the other end of the cable 7 extends vertically upwards and is connected to the control assembly. The assembly controls the ascent or descent of the test shaft 5 by tensioning or relaxing the cable 7 . The control assembly tightens or loosens the cable 7, and when the control assembly changes from tightening the cable 7 to loosening the cable 7, the test shaft 5 begins to fall, and the test shaft 5 descends in a free-fall manner.

The control assembly includes a portal bracket 12, a plurality of guide wheels 81, an electromagnet 10 and an iron magnet 9. The portal bracket 12 is fixed on the workbench 11 through a base plate 20, and the iron magnet 9 is connected to the other end of the cable 7. The electromagnet 10 is installed outside the side frame of the door bracket 12, and a plurality of guide wheels 81 are installed on the top frame of the door bracket 12 parallel to each other. The cable 7 extends vertically upwards and passes through the first After turning, one guide wheel 81 passes through the other guide wheels 81 and extends to the edge of the top frame of the door bracket 12, and then extends downward until the magnet 9 contacts the electromagnet 10, and the electromagnet 10 is a disk. electromagnet. Guide wheel 81 is provided with three, first guide wheel 81 is set on test axis 5 squares, and this directly above that needs to be explained refers to, makes first guide wheel just fit the cable 7 that extends vertically upwards, in A second guide wheel 81 is arranged on one side of the edge position of the door bracket 12, and one side edge of the second guide wheel 81 protrudes from the door bracket 12, and is arranged between the first guide wheel 81 and the second guide wheel 81 The third guide wheel 81, after the cable 7 that extends vertically upwards from the test shaft 5 passes through the first guide wheel 81, the third guide wheel 81 and the second guide wheel 81 successively, from the third guide wheel 81 The outer edge of the turn down.

When not starting, the disc electromagnet 10 will absorb the iron 9, the cable 7 will be tightened, and the test shaft 5 and the foil mounting disc 3 will be pulled by the traction cable 7 to maintain a vertical distance from the thrust disc 2. At the moment of starting, the disc electromagnet 10 disconnects the adsorption on the magnet 9, the cable 7 is loosened, and the test shaft 5 and the foil mounting disc 3 fall freely, simulating the impact disturbance of the thrust bearing during operation.

The control assembly also includes a telescopic rod 8, at least one of the guide wheels 81 is installed on the portal bracket 12 through the telescopic rod 8, and the telescopic rod 8 telescopically drives the guide wheel 81 mounted on the telescopic rod 8. The wheels 81 move in the vertical direction. In the embodiment of the present application, the third guide wheel 81 in the middle is connected to the portal bracket 12 through the telescopic rod 8, and the telescopic rod 8 is telescopic in the vertical direction. In other embodiments, the telescopic rod 8 can also be tilted. By adjusting the length of the telescopic rod 8, the distance between the thrust plate 2 and the foil mounting plate 3 can be adjusted, the impact speed of the foil mounting plate 3 can be adjusted, and impacts of different degrees can be simulated.

As shown in Figures 3 and 4, the measurement assembly also includes a torsion bar 18 and a torsion measurement mechanism 19, and the torsion measurement mechanism 19 includes a U-shaped rotating pin 1904, a connecting rod 1908, an adjustment sleeve 1903, a torsion sensor 1901, a fixed Frame 1902, support frame 1905 and counterweight assembly. The support frame 1905 is fixed on the workbench 11, the support frame 1905 is provided with a horizontal through hole, the connecting rod 1908 is arranged horizontally, the connecting rod 1908 passes through the through hole, and the connecting rod 1908 is in the through hole slide along the axial direction of the connecting rod 1908, one end of the connecting rod 1908 is connected to the torque sensor 1901 through the adjustment sleeve 1903, and the torque sensor 1901 is installed on the workbench 11 through the fixing frame 1902 , the other end of the connecting rod 1908 is connected to the counterweight assembly. The U-shaped rotating pin 1904 is rotatably installed on the connecting rod 1908, the axial direction of the U-shaped rotating pin 1904 is perpendicular to the axial direction of the connecting rod 1908, and one end of the torsion bar 18 is connected to the foil The side of the mounting plate 3, and the torsion bar 18 extends along the radial direction of the foil mounting plate 3, and the torsion bar 18 is placed in the bar-shaped groove of the U-shaped rotating pin 1904,

The counterweight assembly includes a counterweight rope 1907, a counterweight block 1909 and a guide wheel assembly 1906. The connecting rod 1908 is connected to one end of the counterweight rope 1907, and the counterweight rope 1907 extends along the axis of the connecting rod 1908. The guide wheel assembly 1906 first turns upwards and then downwards, and the other end of the counterweight rope 1907 is connected to the counterweight 1909. The guide wheel assembly 1906 includes a guide wheel facing the connecting rod 1908 and a guide wheel located at the first guide wheel. The second guide wheel above the side, the second guide wheel is located on the side away from the connecting rod 1908 of the first guide wheel. There are two sets of torsion bars 18 and torsion measuring mechanisms 19 , which are respectively arranged on opposite sides of the foil mounting plate 3 in the circumferential direction.

A torsion bar 18 is installed symmetrically along the radial direction of the foil mounting plate 3 on the edge of the foil mounting plate 3 , and the torsion bar 18 is connected to a rotatable U-shaped pin 1904 to dynamically detect the torque on the foil mounting plate 3 in real time.

In one embodiment, when the motor is not started, the adsorption of the disc electromagnet 10 to the magnet 9 is disconnected, so that the foil mounting disc 3 is in contact with the thrust disc 2. At this time, the gravity loaded on the test shaft 5 is F, The bearing foil on the foil mounting plate 3 is compressed, and the displacement sensor 15 measures the compression x, so the static stiffness of the bearing foil is k=F/x.

In another embodiment, the adsorption of the disc electromagnet 10 to the iron-absorbing iron 9 is adjusted by adjusting the length of the telescopic rod 8, adjusting the distance between the foil mounting disc 3 and the thrust disc 2, and disconnecting the disc electromagnet after starting the motor. 10 For the adsorption of the magnet 9, the displacement sensor 15 and the torque sensor 1901 measure the process of the foil mounting plate 3 falling, oscillating, and then stably floating under the corresponding loading gravity.

The above two measurement methods are used to test the static performance and dynamic performance of the elastic foil type aerodynamic pressure thrust bearing.

The above is only a specific embodiment of the application, but the scope of protection of the application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. All should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (9)

1. An elastic foil aerodynamic pressure thrust bearing performance detection bench is characterized by comprising a workbench, a driving piece, a thrust disc, a test shaft, a radial hydrostatic bearing, a foil mounting disc, a loading assembly, an impact simulation assembly and a measurement assembly;

the driving piece is fixed on the workbench, and the thrust disc is horizontally arranged on the output end of the driving piece; the radial hydrostatic bearing is fixedly arranged on the workbench, the test shaft is arranged in the radial hydrostatic bearing, two ends of the test shaft extend out of the radial hydrostatic bearing, the bottom end of the test shaft is connected with the foil mounting disc, the test shaft is connected with the impact simulation assembly, the loading assembly is fixed on the test shaft, and the measuring assembly is arranged on the workbench;

the thrust disc, the test shaft, the radial hydrostatic bearing and the foil mounting disc are coaxially arranged, the loading assembly provides changeable loading force for the test shaft, the impact simulation assembly controls the test shaft to accelerate to move towards the thrust disc, and the measuring assembly measures the states of the thrust disc and the foil mounting disc.

2. The resilient foil aerodynamic thrust bearing performance test rig of claim 1, wherein said loading assembly comprises annular weight blocks of various mass specifications, at least one of said annular weight blocks being fixedly mounted on said test shaft, said annular weight block surrounding an outer circumference of said test shaft above said radial hydrostatic bearing.

3. The resilient foil aerodynamic thrust bearing performance test stand of claim 2, wherein a radially protruding protrusion is provided on the outer circumference of said test shaft above said radial hydrostatic bearing, a bottom end face of said annular weight block abutting said protrusion, said loading assembly further comprising a compression nut located above said annular weight block, said compression nut compressing said annular weight block against said protrusion by being threadedly connected to said test shaft.

4. The test rig according to claim 1, wherein the bump simulator assembly comprises a control assembly and a cable connected to the top end of the test shaft, the other end of the cable extending vertically upward and then being connected to the control assembly, the control assembly controlling the raising or lowering of the test shaft by tightening or loosening the cable.

5. The test bench of claim 4, wherein the control assembly comprises a portal frame, a plurality of guide wheels, an electromagnet and a magnet, the portal frame is mounted on the worktable, the magnet is connected to the other end of the cable, the electromagnet is mounted outside the side frame of the portal frame, the guide wheels are mounted on the top frame of the portal frame in parallel, the cable extends vertically upward, then turns through the first guide wheel, then extends to the edge of the top frame of the portal frame through the other guide wheels, and then extends downward to the magnet to contact the electromagnet.

6. The stand for testing the performance of an aerodynamic thrust bearing of an elastic foil according to claim 5, wherein the control assembly further comprises a telescopic rod, at least one of the guide wheels is mounted on the portal bracket through the telescopic rod, and the telescopic rod telescopically moves the guide wheel mounted on the telescopic rod in a vertical direction.

7. The resilient foil aerodynamic thrust bearing performance test rig of claim 1, wherein said measurement assembly comprises a measurement ring surrounding an outer circumference of said thrust disk, said measurement ring being fixed to said table, said measurement ring having a sensor mounted thereon.

8. The stand for testing aerodynamic dynamic pressure thrust bearing performance of an elastic foil according to claim 1, wherein the measuring assembly comprises a torsion bar and a torsion measuring mechanism, the torsion measuring mechanism comprises a support frame, a U-shaped rotating pin, a connecting rod, a torsion sensor and a counterweight assembly, the support frame is fixed on the workbench, the connecting rod is horizontally and slidably mounted on the support frame in the axial direction, one end of the connecting rod is connected with the torsion sensor, the torsion sensor is fixed on the workbench, the other end of the connecting rod is connected with the counterweight assembly, the U-shaped rotating pin is mounted on the connecting rod, the axial direction of the U-shaped rotating pin is perpendicular to the axial direction of the connecting rod, one end of the torsion bar is connected with the side surface of the foil mounting plate, the torsion bar extends in the radial direction of the foil mounting plate, and the torsion bar is disposed in a strip groove of the U-shaped rotating pin.

9. The stand for testing aerodynamic dynamic pressure thrust bearing performance of an elastic foil according to claim 8, wherein the support frame is provided with a horizontal through hole, the connecting rod passes through the through hole, the connecting rod slides in the through hole, the weight assembly comprises a weight rope, a weight block and a guide wheel assembly, one end of the connecting rod is connected with the torque sensor through the adjusting sleeve, the other end of the connecting rod is connected with one end of the weight rope, the weight rope extends along the axial direction of the connecting rod to pass through the guide wheel assembly to turn upwards and then downwards, and the other end of the weight rope is connected with the weight block.

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