Testing device

Abstract

The invention discloses a testing device, which comprises a platform, a supporting seat, a pressure applying rotating shaft and a driving part, and is characterized in that the platform is provided with a fixing part, and the fixing part is used for fixing an axial air foil bearing; the supporting seat is located above the platform and installed on the platform, a shaft hole is formed in the supporting seat, and the shaft hole is located over the fixing part and penetrates through the supporting seat in the vertical direction; the pressing rotating shaft is movably arranged in the shaft hole in a penetrating mode in the vertical direction, and the bottom of the pressing rotating shaft is used for being attached to the axial air foil bearing in a normal state; the driving part is in driving connection with the pressure-applying rotating shaft to drive the pressure-applying rotating shaft to rotate. According to the testing device, the axial air foil bearing can be rapidly tested, and the production requirement of large-scale mass production is met.

Description

Technical Field

[0001] This invention relates to the field of air foil bearing testing technology, and in particular to a testing device. Background Technology

[0002] Air foil hydrodynamic bearings possess advantages such as small size, high reliability, great design freedom, excellent high-temperature characteristics, and low or no maintenance. They have been successfully applied in aircraft air circulation systems, small aero engines, micro gas turbines, and oil-free air compressors for fuel cells, demonstrating extremely broad development prospects and application value. For a long time, the design, manufacturing, and commercial application of air foil hydrodynamic bearings have largely relied on the accumulated experience of designers, and there is a lack of detailed discussions on the design and manufacturing processes of corrugated foil air foil bearings in China. Regarding thrust bearing testing, there is the ISO 22423 standard, and many research institutions have developed air foil thrust bearing test benches, which also illustrates the importance of thrust bearing testing. However, most current air foil thrust bearing test benches have complex testing functions and low testing efficiency, making them unsuitable for large-scale production on bearing production lines. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a testing device that can rapidly test axial air foil bearings, meeting the needs of large-scale mass production.

[0004] According to an embodiment of the present invention, a testing device is used to test an axial air foil bearing. The testing device includes: a platform, the platform having a fixing part for fixing the axial air foil bearing; a support base, the support base being located above the platform and mounted on the platform, the support base having a shaft hole located directly above the fixing part and penetrating the support base in a vertical direction; a pressure-applying shaft, the pressure-applying shaft being movably inserted through the shaft hole in the vertical direction, the bottom of the pressure-applying shaft being used to maintain contact with the axial air foil bearing under normal conditions; and a driving component, the driving component drivingly connecting the pressure-applying shaft to drive the pressure-applying shaft to rotate.

[0005] According to the testing device of this invention, by driving the pressure shaft to rotate, an airflow is formed between the axial air foil bearing and the pressure shaft, thereby separating the axial air foil bearing and the pressure shaft. After the test, the testing device can determine whether the height of the multiple top foils of the axial air foil bearing is consistent in the axial direction by observing whether the surface of the axial air foil bearing is worn, thus determining whether the axial air foil bearing is qualified and ensuring its reliability. At the same time, since the testing device has no other redundant testing functions, it has a simple structure and is easy to operate while fulfilling the testing function of the axial air foil bearing, reducing testing costs. Furthermore, it can be installed on the production line of axial air foil bearings to meet the needs of large-scale mass production, improving the efficiency of testing axial air foil bearings and further reducing costs.

[0006] In some embodiments of the present invention, the pressure-applying shaft includes a shaft body and a turntable. The shaft body passes through the shaft hole and is connected to the drive component. The turntable is detachably mounted on the shaft body. The diameter of the turntable is larger than the diameter of the shaft body, and the turntable is configured such that its diameter is greater than or equal to the diameter of the axial air foil bearing.

[0007] In some embodiments of the present invention, the rotating shaft body includes a first shaft portion and a second shaft portion, the first shaft portion passing through the shaft hole and connected to the driving component, the second shaft portion being connected to the first shaft portion, the diameter of the second shaft portion being smaller than the diameter of the first shaft portion, and the turntable being connected to the second shaft portion.

[0008] In some embodiments of the present invention, the platform is provided with a clearance hole located directly below the shaft hole, and a portion of the second shaft portion is located within the clearance hole. The pressure-applying shaft also includes a locking nut, which is threadedly engaged with the portion of the second shaft portion located within the clearance hole.

[0009] In some embodiments of the present invention, the pressure-applying shaft further includes an adjusting pad, which is installed on the second shaft portion and located between the first shaft portion and the turntable.

[0010] In some embodiments of the present invention, the testing device further includes a radial air foil bearing, which is fitted inside the shaft hole, and the pressure-applying shaft is mounted on the radial air foil bearing.

[0011] In some embodiments of the present invention, the fixing part includes a plurality of positioning pins, which are spaced apart around the axial direction of the shaft hole and are pluggably disposed on the platform along the vertical direction, and are used to fix in the circumferential opening groove of the axial air foil bearing.

[0012] In some embodiments of the present invention, there are three positioning pins, which are arranged at 120-degree intervals.

[0013] In some embodiments of the present invention, the drive component includes a volute and a turbine. The volute is disposed on the top of the support base, and the turbine is disposed inside the volute and connected to the pressure shaft. The axial direction of the turbine is the same as the vertical direction.

[0014] In some embodiments of the present invention, the testing device includes a first detection element and a second detection element, which are disposed on the support base. The first detection element is used to detect the axial position of the pressure-applying shaft, and the second detection element is used to detect the rotational speed of the pressure-applying shaft.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the testing device provided in some embodiments of the present invention; Figure 2 A cross-sectional view of the testing apparatus and axial air foil bearing assembly provided for some embodiments of the present invention; Figure 3 for Figure 2 A magnified view of a portion of point I; Figure 4 A partially enlarged view of the platform and axial air foil bearing assembly provided for some embodiments of the present invention; Figure 5 A schematic diagram illustrating the test results of an axial air foil bearing provided in some embodiments of the present invention; Figure 6 A cross-sectional view of the axial air foil bearing and pressure shaft assembly provided in some embodiments of the present invention; Figure 7 A schematic diagram of the structure of the test device for removing the volute and the axial air foil bearing provided in some embodiments of the present invention; Figure 8 for Figure 7 A sectional view taken along direction AA; Figure 9 A side view of the test apparatus for removing the volute and the axial air foil bearing assembly provided in some embodiments of the present invention; Figure 10A top view of the test apparatus for removing the volute and the axial air foil bearing assembly provided in some embodiments of the present invention; Figure 11 A top view of a testing apparatus provided in some embodiments of the present invention.

[0017] Figure label: 100. Testing equipment; 10. Platform; 10a. Clearance hole; 11. Fixing part; 111. Positioning pin; 20. Support base; 20a. Shaft hole; 30. Pressure-applying shaft; 31. Rotary shaft body; 311. First shaft section; 312. Second shaft section; 32. Turntable; 33. Locking nut; 34. Adjusting shim; 40. Drive components; 41. Vortex housing; 42. Turbine; 50. Radial air foil bearing; 200, Axial air foil bearing; 210, Base plate; 210a, Open slot; 220, Top foil; 220a, Thrust surface; 221, Fixed end; 230, Corrugated foil. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of the same feature, used to distinguish and describe features, without any order or distinction of importance.

[0021] In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The following is for reference. Figures 1-11 The test apparatus 100 of an embodiment of the present invention is described below.

[0023] like Figures 1 to 6 As shown, the testing device 100 of this embodiment of the invention is used to test an axial air foil bearing 200. The testing device 100 includes: a platform 10, a support base 20, a pressure-applying shaft 30, and a driving component 40. The platform 10 is provided with a fixing part 11 for fixing the axial air foil bearing 200. The support base 20 is located above the platform 10 and is installed on the platform 10. The support base 20 is provided with a shaft hole 20a, which is located directly above the fixing part 11 and extends through the support base 20 in the vertical direction. The pressure-applying shaft 30 is movably inserted through the shaft hole 20a in the vertical direction. The bottom of the pressure-applying shaft 30 is used to keep in contact with the axial air foil bearing 200 under normal conditions. The driving component 40 drives the pressure-applying shaft 30 to rotate.

[0024] Platform 10 can refer to the component that supports the testing device 100 and fixes the axial air foil bearing 200, and can be, but is not limited to, a frame structure, plate structure, or beam structure, etc. Fixing part 11 refers to the structure used to fix the axial air foil bearing 200, and can be, but is not limited to, a locating pin 111, bolt, wedge key, etc.

[0025] The support base 20 can refer to the component that supports the drive component 40 and the pressure shaft 30. The connection method between the support base 20 and the platform 10 can be, but is not limited to, welding, bolting, snap-fitting, riveting, etc. The support base 20 can be, but is not limited to, alloy steel, stainless steel, aluminum alloy, and composite materials, etc. The support base 20 is provided with a shaft hole 20a, which is located directly above the fixing part 11 and extends through the support base 20 in the vertical direction, so that the shaft hole 20a coincides with the axis of the axial air foil bearing 200.

[0026] The pressure shaft 30 can refer to a component that can rotate axially. The pressure shaft 30 is movably inserted into the shaft hole 20a in the vertical direction. The bottom of the pressure shaft 30 is used to keep in contact with the axial air foil bearing 200 under normal conditions.

[0027] The drive component 40 can refer to the component that drives the pressure shaft 30, and the drive method can be, but is not limited to, hydraulic drive, electric drive, or pneumatic drive, etc.

[0028] refer to Figure 5 and Figure 6 The axial air foil bearing 200 may include a base plate 210, a top foil 220, and a corrugated foil 230. Multiple top foils 220 are provided. Each top foil 220 has a fixed end 221 and a thrust surface 220a. The fixed end 221 is used to fix the top foil 220, and the thrust surface 220a is located at the end away from the base plate 210. A corrugated foil 230 is provided between the top foil 220 and the base plate 210. The corrugated foil 230 has a certain elasticity.

[0029] In the above technical solution, the axial air foil bearing 200 is fixed on the platform 10, so that the axes of the axial air foil bearing 200, the pressure shaft 30 and the shaft hole 20a are coincident. The bottom of the pressure shaft 30 is kept in contact with the axial air foil bearing 200 under the action of gravity. The drive component 40 is activated to rotate the pressure shaft 30. The pressure shaft 30 and the axial air foil bearing 200 form an airflow, causing the pressure shaft 30 to move slightly away from the axial air foil bearing 200, thereby separating the bottom of the pressure shaft 30 and the axial air foil bearing 200 to form a small gap, and quickly completing the takeoff test of the axial air foil bearing 200. During the test, the position of the axial air foil bearing 200 does not change, and the airflow direction flows from the fixed end 221 of the top foil 220 to the other end away from the fixed end 221, so that a gas pressure film is formed between the bottom of the top foil 220 and the pressure shaft 30. The gas pressure film and the elastic corrugated foil 230 together support the load.

[0030] After the test, the pressure shaft 30 and the axial air foil bearing 200 are separated manually or electrically. The axial air foil bearing 200 is then removed, and the top foil 220 is inspected for wear. If wear is present, it indicates that the thrust surface 220a of the top foil 220 is higher than the thrust surface 220a of other top foils 220 in the axial direction of the axial air foil bearing 200, and the axial air foil bearing 200 is defective (see...). Figure 5 For example, refer to Figure 5 The axial air foil bearing 200 contains six top foils 220. If one of the top foils 220 is worn, the axial air foil bearing 200 is defective.

[0031] According to the testing device 100 of this embodiment, by driving the pressure shaft 30 to rotate, an airflow is formed between the axial air foil bearing 200 and the pressure shaft 30, thereby separating the axial air foil bearing 200 and the pressure shaft 30. After the test, the testing device 100 can determine whether the height of the multiple top foils 220 of the axial air foil bearing 200 is consistent in the axial direction by observing whether the surface of the axial air foil bearing 200 is worn, and thus determine whether the axial air foil bearing 200 is qualified, ensuring the reliability of the axial air foil bearing 200. At the same time, since the testing device 100 has no other redundant testing functions, it has a simple structure and is easy to operate while fulfilling the testing function of the axial air foil bearing 200, which can reduce testing costs. Moreover, it can be installed on the production line of the axial air foil bearing 200 to meet the production needs of large-scale mass production, improve the efficiency of testing the axial air foil bearing 200, and also reduce costs.

[0032] In some embodiments of the present invention, reference is made to... Figure 2 , Figure 7 and Figure 8 The pressure shaft 30 includes a shaft body 31 and a turntable 32. The shaft body 31 passes through the shaft hole 20a and is connected to the drive component 40. The turntable 32 is detachably mounted on the shaft body 31. The diameter of the turntable 32 is larger than the diameter of the shaft body 31, and the turntable 32 is configured such that its diameter is greater than or equal to the diameter of the axial air foil bearing 200.

[0033] The shaft body 31 and the turntable 32 can be detachably connected, thereby facilitating replacement and maintenance. For example, the shaft body 31 and the turntable 32 can be connected by threads.

[0034] Understandably, the turntable 32 is configured with a diameter greater than or equal to that of the axial air foil bearing 200, so that the turntable 32 can completely cover the axial air foil bearing 200, allowing all surfaces of the axial air foil bearing 200 to be tested, ensuring comprehensive testing and eliminating blind spots.

[0035] In the above technical solution, the separate design of the rotating shaft body 31 and the turntable 32 ensures that the axial air foil bearing 200 can be tested while reducing the weight of the pressure-applying rotating shaft 30, thus saving costs. It also facilitates manual removal of the axial air foil bearing 200 after testing. The diameter of the turntable 32 is larger than that of the rotating shaft body 31, and the turntable 32 is configured with a diameter greater than or equal to that of the axial air foil bearing 200. This ensures that the turntable 32 fully covers the axial air foil bearing 200, resulting in better testing. Furthermore, it lowers the center of gravity of the pressure-applying rotating shaft 30, improving its rotational stability and the accuracy of the test results from the testing device 100. It also ensures that the top foil 220 of the axial air foil bearing 200 is fully in contact with the turntable 32 under normal conditions, allowing for complete testing of the consistency of the height of multiple thrust surfaces 220a in the axial direction of the axial air foil bearing 200, further improving the accuracy of the test results from the testing device 100.

[0036] In some embodiments of the present invention, reference is made to... Figure 2 , Figure 7 and Figure 8 The rotating shaft body 31 includes a first shaft portion 311 and a second shaft portion 312. The first shaft portion 311 passes through the shaft hole 20a and is connected to the drive component 40. The second shaft portion 312 is connected to the first shaft portion 311. The diameter of the second shaft portion 312 is smaller than the diameter of the first shaft portion 311. The turntable 32 is connected to the second shaft portion 312.

[0037] In the above technical solution, the diameter of the second shaft portion 312 is smaller than the diameter of the first shaft portion 311. On the one hand, this can further reduce the weight of the rotating shaft body 31 and reduce costs, and on the other hand, it can facilitate the installation of the turntable 32.

[0038] In some embodiments of the present invention, reference is made to... Figure 2 , Figure 7 and Figure 8 The platform 10 is provided with a clearance hole 10a, which is located directly below the shaft hole 20a. A portion of the second shaft portion 312 is located inside the clearance hole 10a. The pressure shaft 30 also includes a locking nut 33, which is threaded onto the portion of the second shaft portion 312 located inside the clearance hole 10a.

[0039] In the above technical solution, the clearance hole 10a is located directly below the shaft hole 20a, and part of the second shaft portion 312 is located inside the clearance hole 10a. This can further lower the center of gravity of the pressure-applying rotating shaft 30, which is beneficial to further improve the rotational stability of the axial air foil bearing 200 and improve the accuracy of the test results. The locking nut 33 is threadedly fitted on the part of the second shaft portion 312 located inside the clearance hole 10a, and the locking nut 33 abuts against the turntable 32, which can fix the turntable 32 and prevent the turntable 32 from shaking or moving during rotation, ensuring the rotational stability of the turntable 32 and further improving the accuracy of the test results.

[0040] In some embodiments of the present invention, reference is made to... Figure 2 , Figure 7 and Figure 8 The pressure shaft 30 also includes an adjusting pad 34, which is installed on the second shaft portion 312 and located between the first shaft portion 311 and the turntable 32.

[0041] In the above technical solution, the adjusting shim 34 is installed on the second shaft 312 and located between the first shaft 311 and the turntable 32. The adjusting shim 34 can abut against the turntable 32 to limit the displacement of the turntable 32, which helps to ensure the stability of the rotation of the turntable 32 and improve the accuracy of the test results.

[0042] Optionally, the adjusting shim 34 is circular, and its diameter is greater than or equal to the diameter of the first shaft portion 311. That is, the diameter of the adjusting shim 34 is not smaller than the diameter of the first shaft portion 311, thus providing a larger contact surface with the turntable 32 and improving the pressing stability of the turntable 32. The adjusting shim 34 is a replaceable component. When testing axial air foil bearings 200 of different sizes, different diameters of the turntable 32 are selected, and correspondingly, the size of the adjusting shim 34 can also be adjusted, thereby meeting the testing requirements of axial air foil bearings 200 of different sizes.

[0043] In some embodiments of the present invention, reference is made to... Figure 2 , Figure 7 and Figure 8 The testing device 100 also includes a radial air foil bearing 50, which is fitted inside the shaft hole 20a, and the pressure shaft 30 is mounted on the radial air foil bearing 50.

[0044] In the above technical solution, the radial air foil bearing 50 can support the pressure shaft 30 in the radial direction, limit the displacement of the pressure shaft 30, and ensure the high-speed rotation of the pressure shaft 30. This ensures the stability of the rotation of the pressure shaft 30, better simulates the real use scenario of the axial air foil bearing 200, avoids the tilting of the contact surface between the turntable 32 and the axial air foil bearing 200 during the test, and thus ensures the reliability of the test results.

[0045] In some embodiments of the present invention, reference is made to... Figure 4 The fixing part 11 includes a plurality of positioning pins 111, which are arranged at intervals around the axial direction of the shaft hole 20a and are pluggably provided on the platform 10 in the vertical direction, and are used to fix them in the circumferential opening slot 210a of the axial air foil bearing 200.

[0046] The number of positioning pins 111 can be, but is not limited to, two, three, four, five, etc.

[0047] In the above technical solution, the design of the locating pin 111 can limit the displacement and rotation of the axial air foil bearing 200, ensuring that the axial air foil bearing 200 remains stable during the test and improving the reliability of the test device 100. At the same time, the design of the locating pin 111 also facilitates the installation and removal of the locating pin 111, thereby facilitating the installation and removal of the axial air foil bearing 200 and improving test efficiency.

[0048] In some embodiments of the present invention, reference is made to... Figure 4 There are three positioning pins 111, and the three positioning pins 111 are arranged at 120-degree intervals.

[0049] It is understandable that the positioning pin 111 is connected to the platform 10 through the open slot 210a. When installing the positioning pin 111, two or three positioning pins 111 can be installed, and both can achieve circumferential positioning of the axial air foil bearing 200. If three positioning pins 111 are installed, when removing the axial air foil bearing 200, only one positioning pin 111 needs to be pulled out, and the axial air foil bearing 200 can be pulled out from the end where the positioning pin 111 is pulled out. If two positioning pins 111 are installed, the axial air foil bearing 200 can be pulled out directly without disassembling the positioning pins 111.

[0050] In the above technical solution, there are three positioning pins 111, which are arranged at 120-degree intervals. This can limit the displacement and rotation of the axial air foil bearing 200, and also facilitate the removal of the axial air foil bearing 200, thereby improving the efficiency of the test and further enhancing the reliability of the test device 100.

[0051] In some embodiments of the present invention, reference is made to... Figure 1 , Figures 9 to 11 The drive component 40 includes a volute 41 and a turbine 42. The volute 41 is located on the top of the support base 20, and the turbine 42 is located inside the volute 41 and connected to the pressure shaft 30. The axial direction and the vertical direction of the turbine 42 are the same.

[0052] It is understandable that an external air compressor can be connected to the volute 41, so that the volute 41 can drive the turbine 42 to rotate the pressure shaft 30 by compressing air. The air compressor can be equipped with a pressure reducing valve to regulate the pressure and control the speed of the pressure shaft 30, thereby meeting the needs under different test conditions.

[0053] In the above technical solution, the design of the vortex casing 41 and turbine 42 effectively converts the energy of compressed air into the rotational power of the pressure shaft 30, exhibiting high energy conversion efficiency and stability. It also avoids electromagnetic interference problems that may arise from traditional motor drives, improving the applicability of the testing device 100. Simultaneously, the use of an external air compressor makes the overall structure of the testing device 100 more compact, facilitating maintenance and operation.

[0054] In some embodiments of the present invention, the testing device 100 includes a first detection element and a second detection element, which are disposed on the support base 20. The first detection element is used to detect the axial position of the pressure shaft 30, and the second detection element is used to detect the rotational speed of the pressure shaft 30.

[0055] The first detection element can detect whether the shaft center of the pressure-applying shaft 30 is normal, and the second detection element can detect whether the rotational speed of the pressure-applying shaft 30 is within a set value, which varies depending on the diameter of the axial air foil bearing 200. For example, the diameter of the axial air foil bearing 200 is 50 mm, and the range of the set value is 25000 r / min to 35000 r / min. The first and second detection elements can be, but are not limited to, sensors or other detection instruments. For example, the first detection element is a shaft center sensor, and the second detection element is a rotational speed sensor.

[0056] In the above technical solution, by setting the first and second detection components, the axial position and rotation speed of the pressure shaft 30 can be monitored in real time, and the deviation or abnormal vibration of the pressure shaft 30 can be detected in time, thereby avoiding test errors caused by axial deviation and ensuring the accuracy of test results.

[0057] The following is combined Figures 1 to 11 This describes a specific embodiment of the testing apparatus 100 of the present invention.

[0058] The testing device 100 is used to measure the axial air foil bearing 200. The testing device 100 includes: platform 10, support base 20, pressure shaft 30, drive component 40, radial air foil bearing 50, first test piece and second test piece.

[0059] Platform 10 is provided with a fixing part 11 and a clearance hole 10a. The fixing part 11 includes three locating pins 111, which are arranged at 120-degree intervals and are pluggably provided in the platform 10 in the vertical direction, and are used to fix them in the circumferential opening groove 210a of the axial air foil bearing 200. The clearance hole 10a is provided directly below the shaft hole 20a, and part of the second shaft portion 312 is located in the clearance hole 10a.

[0060] The support base 20 is located above the platform 10 and is installed on the platform 10. The support base 20 is provided with a shaft hole 20a, which is located directly above the fixing part 11 and passes through the support base 20 in the vertical direction.

[0061] The pressure-applying shaft 30 includes a shaft body 31, a turntable 32, a locking nut 33, and an adjusting pad 34. The shaft body 31 includes a first shaft portion 311 and a second shaft portion 312. The first shaft portion 311 passes through the shaft hole 20a and is connected to the drive component 40. The second shaft portion 312 is connected to the first shaft portion 311. The diameter of the second shaft portion 312 is smaller than the diameter of the first shaft portion 311. The turntable 32 is connected to the second shaft portion 312.

[0062] The diameter of the turntable 32 is larger than the diameter of the shaft body 31, and the turntable 32 is configured with a diameter greater than or equal to the diameter of the axial air foil bearing 200. A locking nut 33 is threaded onto the portion of the second shaft portion 312 located within the clearance hole 10a. An adjusting shim 34 is installed on the second shaft portion 312 and is located between the first shaft portion 311 and the turntable 32.

[0063] The drive component 40 includes a volute 41 and a turbine 42. The volute 41 is located on the top of the support base 20, and the turbine 42 is located inside the volute 41 and connected to the pressure shaft 30. The axial direction and the vertical direction of the turbine 42 are the same.

[0064] The radial air foil bearing 50 is fitted inside the shaft hole 20a, and the pressure shaft 30 is mounted on the radial air foil bearing 50.

[0065] The first and second detection components are located on the support base 20. The first detection component is a shaft center sensor used to detect the shaft center position of the pressure shaft 30, and the second detection component is a speed sensor used to detect the speed of the pressure shaft 30.

[0066] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A test apparatus for testing an axial air foil bearing, comprising: The test device comprises: a platform provided with a fixing portion for fixing the axial air foil bearing; a support seat located above and mounted on the platform, the support seat being provided with a shaft hole located directly above the fixing portion and penetrating the support seat in the up-down direction; a pressing shaft movably penetrating the shaft hole in the up-down direction, the bottom of the pressing shaft being used to keep in close contact with the axial air foil bearing in the normal state; a driving component drivingly connected to the pressing shaft to drive the pressing shaft to rotate.

2. The test device of claim 1, wherein, The pressing shaft comprises a shaft body penetrating the shaft hole and connected to the driving component, and a disc detachably provided on the shaft body, the disc having a diameter greater than that of the shaft body, and the disc being configured to have a diameter greater than or equal to that of the axial air foil bearing.

3. The test device of claim 2, wherein, The shaft body comprises a first shaft portion penetrating the shaft hole and connected to the driving component, and a second shaft portion connected to the first shaft portion, the second shaft portion having a diameter smaller than that of the first shaft portion, and the disc being connected to the second shaft portion.

4. The test device of claim 3, wherein, The platform is provided with an avoiding hole located directly below the shaft hole, and a part of the second shaft portion is located in the avoiding hole, and the pressing shaft further comprises a locking nut threadedly fitted on the part of the second shaft portion located in the avoiding hole.

5. The test device of claim 4, wherein, The pressing shaft further comprises an adjusting pad mounted on the second shaft portion and located between the first shaft portion and the disc.

6. The test device of claim 1, wherein, The test device further comprises a radial air foil bearing sleeved in the shaft hole, and the pressing shaft is mounted on the radial air foil bearing.

7. The test device of claim 1, wherein, The fixing portion comprises a plurality of positioning pins arranged at intervals around the axis of the shaft hole and pluggably provided on the platform in the up-down direction, and used to be fixed in the opening clamping groove circumferentially arranged on the axial air foil bearing.

8. The test device of claim 7, wherein, The positioning pins are three, and the three positioning pins are arranged at intervals of 120 degrees.

9. The test device of claim 1, wherein, The driving component comprises a volute provided on the top of the support seat and a turbine provided in the volute and connected to the pressing shaft, and the turbine has the same direction as the up-down direction in the axial direction.

10. The test device of any one of claims 1 to 9, wherein, The test device comprises a first detection component and a second detection component provided on the support seat, wherein the first detection component is used to detect the axial position of the pressing shaft, and the second detection component is used to detect the rotating speed of the pressing shaft.

Images