Aerodynamic bearing test platform

Abstract

This invention belongs to the field of hydrodynamic air bearing technology, and relates to a hydrodynamic air bearing testing platform. The platform includes a platform body, an X-axis precision fine-tuning moving platform, and a Z-axis precision fine-tuning lifting platform, each fixed to the platform body. A high-speed motor is fixed on the X-axis precision fine-tuning moving platform. The power output shaft of the high-speed motor is connected to a thrust plate. A pressure sensor and a torque measuring instrument measure the force and torque on the axial force output rod and torque output rod, respectively. A bearing mounting base is positioned opposite to the thrust plate and is used to fix the hydrodynamic air bearing to be tested. The X-axis precision fine-tuning moving platform drives the high-speed motor and the thrust plate to move horizontally, while the Z-axis precision fine-tuning lifting platform drives the linear bearing housing and the bearing mounting base to move vertically. This invention's testing platform can accommodate different types of air bearings, and can control the bearing's operating speed and air film thickness in real time, recording the load conditions under different operating states.

Description

Technical Field

[0001] This invention belongs to the field of hydrodynamic air bearing technology and relates to a hydrodynamic air bearing testing platform. Background Technology

[0002] Air lubrication technology broke the dominance of liquid lubrication in the mechanical field, leading to rapid development in the field of lubrication technology. Today, it is widely used in aerospace, automotive, and marine industries. Based on the different methods of air film formation, it can be divided into two main categories: hydrostatic bearings and hydrodynamic bearings. Hydrostatic bearings require an independent air supply system, and their complexity limits their application scenarios to some extent. Hydrodynamic bearings generate air film pressure and provide load-bearing capacity through the compression effect of a wedge-shaped air film under high-speed rotor rotation, making them more widely used. With the current trend of new energy development, oil-free air bearings are becoming increasingly popular. Due to the design and manufacturing difficulties of hydrodynamic air bearings, more research and development experiments are needed, and testing methods are scarce. Most existing testing methods are either specific to fixed bearing models or rudimentary. Currently, there is a lack of a testing platform capable of testing multiple types of air bearings. Summary of the Invention

[0003] To overcome the problems existing in the prior art, the present invention proposes a dynamic pressure air bearing testing platform. This testing platform can be used to replace air bearings of different models, control the bearing's operating speed and air film thickness in real time, and record the load under different operating conditions.

[0004] The technical solution of this invention to solve the above problems is: a hydrodynamic air bearing testing platform, which is special in that:

[0005] Includes the platform body, X-axis precision fine-tuning moving platform, Z-axis precision fine-tuning lifting platform, thrust plate, and bearing mounting base.

[0006] The X-axis precision fine-tuning moving platform and the Z-axis precision fine-tuning lifting platform are respectively fixed on the platform body.

[0007] A high-speed motor and a non-contact eddy current sensor are fixed on the X-axis precision fine-tuning moving platform. The power output shaft of the high-speed motor is connected to the thrust disk. The non-contact eddy current sensor is used to measure the thickness of the air film. Before testing, the X-axis precision fine-tuning moving platform is adjusted to make the working surface of the air bearing fit with the thrust disk. Then, the probe of the eddy current sensor is adjusted to fit with and fix the thrust disk. After that, the thickness of the air film can be obtained in real time when the X-axis precision fine-tuning moving platform is adjusted.

[0008] A linear bearing housing, a pressure sensor, and a torque measuring instrument are fixed on the Z-axis precision fine-tuning lifting platform. The bearing mounting base is connected to one end of the linear bearing housing, and the other end of the linear bearing housing is equipped with an axial force output rod and a torque output rod. The pressure sensor and the torque measuring instrument measure the force and torque on the axial force output rod and the torque output rod, respectively. The bearing mounting base is set opposite to the thrust plate and is used to fix the hydrodynamic air bearing to be tested.

[0009] The X-axis precision fine-tuning moving platform drives the high-speed motor and thrust plate to move horizontally, while the Z-axis precision fine-tuning lifting platform drives the linear bearing box and bearing fixing seat to move vertically.

[0010] Furthermore, it also includes data display instruments, which are used to display the speed of the high-speed motor as well as the values ​​on the pressure force sensor, torque meter and non-contact eddy current sensor.

[0011] Furthermore, the aforementioned bearing mounting base and linear bearing housing are detachably connected.

[0012] Furthermore, the speed of the aforementioned high-speed motor can be adjusted.

[0013] Furthermore, the aforementioned high-speed motor is fixed to the X-axis precision fine-tuning moving platform via a mounting bracket.

[0014] Furthermore, the aforementioned mounting base includes a base, two mounting brackets, and a mounting plate, with the high-speed motor located on the base; one end of each of the two mounting brackets is fixed to the base, and the two mounting brackets are located on both sides of the high-speed motor respectively; the mounting plate has U-shaped holes on both sides, and the other ends of the two mounting brackets pass through the two U-shaped holes of the mounting plate respectively and are fixed with bolts.

[0015] Furthermore, the platform itself is a high-precision optical flat panel.

[0016] Furthermore, the aforementioned bearing mounting base is coaxially arranged with the thrust disc.

[0017] Furthermore, the aforementioned non-contact eddy current sensor is mounted on one side of the high-speed motor.

[0018] Furthermore, the number of the aforementioned fixing seats is one or two.

[0019] Advantages of this invention:

[0020] This invention proposes a hydrodynamic air bearing testing platform. This platform allows for the replacement of different types of air bearings, real-time control of bearing speed and air film thickness, and recording of load conditions under various operating states. This invention provides a precise testing method for hydrodynamic air bearings, contributing to the development of air bearings; its simple structure also reduces research and testing costs. Attached Figure Description

[0021] Figure 1 This is a front view of the hydrodynamic air bearing testing platform of the present invention;

[0022] Figure 2 for Figure 1 Top view.

[0023] The components are: 1-High-speed motor, 2-Fixed base, 3-X-axis precision fine-tuning moving platform, 4-Thrust plate, 5-Bearing fixed base, 6-Linear bearing box, 7-Torque output rod, 8-Axial force output rod, 9-Z-axis precision fine-tuning lifting platform, 10-Pressure force sensor, 11-Non-contact measurement eddy current sensor, 12-Platform body, 13-Data display instrument, 14-Torque measuring instrument, 15-Base, 16-Fixed bracket, 17-Fixed plate. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0025] The dynamic pressure air bearing testing and control platform mainly solves the problem of testing the load-bearing capacity of air bearings.

[0026] This invention proposes a dynamic pressure air bearing testing platform, including a platform body 12, an X-axis precision fine-tuning moving platform 3, a Z-axis precision fine-tuning lifting platform 9, a thrust plate 4, and a bearing fixing seat 5.

[0027] The X-axis precision fine-tuning moving platform 3 and the Z-axis precision fine-tuning lifting platform 9 are respectively fixed on the platform body 12. The X-axis precision fine-tuning moving platform 3 is fixed with a high-speed motor 1 and a non-contact measurement eddy current sensor 11. The power output shaft of the high-speed motor 1 is connected to the thrust plate 4. The non-contact measurement eddy current sensor 11 is used to measure the thickness of the air film. Before the test, the X-axis precision fine-tuning moving platform 3 is adjusted to make the working surface of the air bearing fit with the thrust plate 4. Then, the probe of the non-contact measurement eddy current sensor 11 is adjusted to fit with the thrust plate 4 and fixed. After that, the thickness of the air film can be obtained in real time when the X-axis precision fine-tuning moving platform 3 is adjusted.

[0028] A linear bearing housing 6, a pressure sensor 10, and a torque measuring instrument 14 are fixed on the Z-axis precision fine-tuning lifting platform 9. The bearing mounting base 5 is connected to one end of the linear bearing housing 6, and the other end of the linear bearing housing 6 is provided with an axial force output rod 8 and a torque output rod 7. The pressure sensor 10 and the torque measuring instrument 14 measure the force and torque on the axial force output rod 8 and the torque output rod 7, respectively. The bearing mounting base 5 is set opposite to the thrust plate 4 and is used to fix the hydrodynamic air bearing to be tested. The X-axis precision fine-tuning moving platform 3 drives the high-speed motor 1 and the thrust plate 4 to translate in the horizontal direction, and the Z-axis precision fine-tuning lifting platform 9 drives the linear bearing housing 6 and the bearing mounting base 5 to translate in the vertical direction.

[0029] As a preferred embodiment of the present invention, the above-mentioned dynamic pressure air bearing test platform further includes a data display instrument 13, which is used to display the rotational speed of the high-speed motor 1 and the values ​​on the pressure force sensor 10, the torque measuring instrument 14 and the non-contact measurement eddy current sensor 11.

[0030] In a preferred embodiment of the present invention, the bearing mounting base 5 and the linear bearing housing 6 are detachably connected, and different outer diameter hydrodynamic air bearings can be fixed by replacing the bearing mounting base 5, so as to realize the testing of multiple models of air bearings.

[0031] In a preferred embodiment of the present invention, the speed of the high-speed motor 1 is adjustable.

[0032] In a preferred embodiment of the present invention, the high-speed motor 1 is fixed on the X-axis precision fine-tuning moving platform 3 by means of the fixing seat 2.

[0033] Preferably, the fixing base 2 includes a base 15, two fixing brackets 16 and a fixing plate 17, with the high-speed motor 1 located on the base 15; one end of each of the two fixing brackets 16 is fixed to the base 15, and the two fixing brackets 16 are respectively located on both sides of the high-speed motor 1; the fixing plate 17 has U-shaped holes on both sides, and the other ends of the two fixing brackets 16 pass through the two U-shaped holes of the fixing plate 17 and are fixed with bolts.

[0034] Preferably, the bearing mounting base 5 is coaxially arranged with the thrust disk 4. The non-contact eddy current sensor 11 is located on one side of the high-speed motor 1. The number of mounting bases 2 is one or two.

[0035] Example

[0036] See Figure 1 A dynamic pressure air bearing testing platform includes a platform body 12, an X-axis precision fine-tuning moving platform 3, a Z-axis precision fine-tuning lifting platform 9, a thrust disk 4, a data display instrument 13, and a bearing mounting base 5. The platform body 12 is a high-precision optical flat plate.

[0037] The X-axis precision fine-tuning moving platform 3 and the Z-axis precision fine-tuning lifting platform 9 are fixed on the left and right sides of the platform body 12, respectively. The X-axis precision fine-tuning moving platform 3 is equipped with a speed-adjustable high-speed motor 1 and a non-contact eddy current sensor 11. The power output shaft of the high-speed motor 1 is connected to the thrust disk 4. The non-contact eddy current sensor 11 is fixed to the X-axis precision fine-tuning moving platform 3 by a fixing block and is used to measure the thickness of the air film. Before testing, the X-axis precision fine-tuning moving platform 3 is adjusted to make the working surface of the air bearing fit against the thrust disk 4. Then, the probe of the non-contact eddy current sensor 11 is adjusted to fit against and be fixed to the thrust disk 4. After that, the thickness of the air film can be obtained in real time when the X-axis precision fine-tuning moving platform 3 is adjusted.

[0038] High-speed motor 1 drives the thrust disk 4 to rotate. X-axis precision fine-tuning moving platform 3 drives high-speed motor 1 and thrust disk 4 to translate horizontally.

[0039] A linear bearing housing 6, a pressure sensor 10, and a torque measuring instrument 14 are fixed on the Z-axis precision fine-tuning lifting platform 9. The bearing mounting base 5 is connected to one end of the linear bearing housing 6, and the other end of the linear bearing housing 6 is provided with an axial force output rod 8 and a torque output rod 7. The pressure sensor 10 and the torque measuring instrument 14 measure the force and torque on the axial force output rod 8 and the torque output rod 7, respectively. The bearing mounting base 5 is set opposite to the thrust plate 4 and is used to fix the hydrodynamic air bearing to be tested. The Z-axis precision fine-tuning lifting platform 9 drives the linear bearing housing 6 and the bearing mounting base 5 to translate in the vertical direction.

[0040] The data display instrument 13 displays the rotational speed of the high-speed motor 1, the distance between the thrust disk 4 and the working surface of the hydrodynamic air bearing under test, as well as the values ​​on the pressure sensor 10, torque meter 14, and non-contact eddy current sensor 11. The bearing mounting base 5 and the linear bearing housing 6 are detachably connected, allowing for the replacement of the bearing mounting base 5 to fix hydrodynamic air bearings of different outer diameters, thus enabling the testing of multiple models of air bearings.

[0041] In a preferred embodiment of the present invention, the high-speed motor 1 is fixed to the X-axis precision fine-tuning moving platform 3 via a fixing base 2. The fixing base 2 includes a base 15, two fixing brackets 16, and a fixing plate 17. The high-speed motor 1 is located on the base 15. One end of each of the two fixing brackets 16 is fixed to the base 15, and the two fixing brackets 16 are respectively located on both sides of the high-speed motor 1. The fixing plate 17 has U-shaped holes on both sides, and the other ends of the two fixing brackets 16 pass through the two U-shaped holes of the fixing plate 17 and are fixed with bolts.

[0042] In this embodiment, the hydrodynamic air bearing to be tested is first fixed on the bearing mounting base 5, with the bearing working surface facing the thrust disk 4. The speed of the high-speed motor 1 is controlled by the motor controller to control the rotational speed of the thrust disk 4, simulating the bearing's rotational speed operating conditions. Then, the distance between the thrust disk 4 and the working surface of the bearing to be tested is controlled by adjusting the horizontal movement of the X-axis precision fine-tuning moving platform 3, simulating the bearing's operation under different air film thicknesses. By monitoring the pressure and force sensors 10 and the non-contact eddy current sensor 11 on the data display instrument 13, the load-bearing capacity and generated torque of the hydrodynamic air bearing under different rotational speeds and different air film thicknesses are obtained.

[0043] The height of the Z-axis precision fine-tuning lifting platform 9 can be adjusted to accommodate different models of high-speed motors 1, ensuring the coaxiality of the bearing under test and the thrust plate 4. The bearing mounting base 5 and the axial force output rod 8 are detachable, allowing for the replacement of the bearing mounting base 5 to fix hydrodynamic air bearings of different outer diameters, thus enabling the testing of multiple models of air bearings.

[0044] The above description is merely an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related system fields, are similarly included within the scope of protection of the present invention.

Claims

1. A testing platform for hydrodynamic air bearings, characterized in that: It includes the platform body (12), the X-axis precision fine-tuning moving platform (3), the Z-axis precision fine-tuning lifting platform (9), the thrust plate (4), and the bearing fixing seat (5). The X-axis precision fine-tuning moving platform (3) and the Z-axis precision fine-tuning lifting platform (9) are respectively fixed on the platform body (12). A high-speed motor (1) and a non-contact measurement eddy current sensor (11) are fixed on the X-axis precision fine-tuning moving platform (3); the power output shaft of the high-speed motor (1) is connected to the thrust disk (4); the non-contact measurement eddy current sensor (11) is used to measure the thickness of the air film; A linear bearing housing (6), a pressure sensor (10), and a torque measuring instrument (14) are fixed on the Z-axis precision fine-tuning lifting platform (9). The bearing mounting base (5) is connected to one end of the linear bearing housing (6), and the other end of the linear bearing housing (6) is provided with an axial force output rod (8) and a torque output rod (7). The pressure sensor (10) and the torque measuring instrument (14) measure the force and torque on the axial force output rod (8) and the torque output rod (7), respectively. The bearing mounting base (5) is set opposite to the thrust plate (4), and the bearing mounting base (5) is used to fix the hydrodynamic air bearing to be tested. The X-axis precision fine-tuning moving platform (3) drives the high-speed motor (1) and the thrust plate (4) to move horizontally to adjust the air film thickness; the Z-axis precision fine-tuning lifting platform (9) drives the linear bearing box (6) and the bearing fixing seat (5) to move vertically to ensure that the bearing fixing seat (5) and the thrust plate (4) are coaxial. The bearing mounting base (5) and the linear bearing housing (6) are detachably connected; The non-contact measurement eddy current sensor (11) is located on one side of the high-speed motor (1).

2. The hydrodynamic air bearing testing platform according to claim 1, characterized in that: It also includes a data display instrument (13) for displaying the speed of the high-speed motor (1) as well as the values ​​on the pressure sensor (10), torque meter (14) and non-contact eddy current sensor (11).

3. The hydrodynamic air bearing testing platform according to claim 2, characterized in that: The speed of the high-speed motor (1) can be adjusted.

4. A hydrodynamic air bearing testing platform according to any one of claims 1-3, characterized in that: The high-speed motor (1) is fixed on the X-axis precision fine-tuning moving platform (3) by a fixed seat (2).

5. The hydrodynamic air bearing testing platform according to claim 4, characterized in that: The fixed base (2) includes a base (15), two fixed brackets (16) and a fixed plate (17). The high-speed motor (1) is located on the base (15). One end of the two fixed brackets (16) is fixed on the base (15), and the two fixed brackets (16) are located on both sides of the high-speed motor (1). The two sides of the fixed plate (17) are provided with U-shaped holes. The other ends of the two fixed brackets (16) pass through the two U-shaped holes of the fixed plate (17) and are fixed with bolts.

6. The hydrodynamic air bearing testing platform according to claim 5, characterized in that: The platform body (12) is a high-precision optical flat plate.

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