阅读说明：本技术 箔片空气轴承的波箔刚度测试设备 (Foil rigidity testing equipment of foil air bearing ) 是由 张严 朱建军 欧玉书 于 2021-10-09 设计创作，主要内容包括：本申请公开了一种箔片空气轴承的波箔刚度测试设备,波箔刚度测试设备包括：测试台,用于承载所述箔片空气轴承的波箔；加载机构,包括驱动部件和推力盘,所述驱动部件连接于所述推力盘；传感模块,包括力传感器和位移传感器,所述力传感器用于检测所述推力盘承载的加载力,所述位移传感器用于检测所述推力盘的位移。上述的箔片空气轴承的波箔刚度测试设备可以将待测试的波箔放置于测试台,加载机构的驱动部件推动推力盘移动以挤压位于测试台上的波箔,在挤压过程中,通过传感模块的力传感器和位移传感器检测推力盘的加载力以及位移,从而可以对波箔的刚度作出检测。(The application discloses foil air bearing's ripples foil rigidity test equipment, ripples foil rigidity test equipment includes: the test bench is used for bearing the bump foil of the foil air bearing; the loading mechanism comprises a driving part and a thrust disc, and the driving part is connected with the thrust disc; and the sensing module comprises a force sensor and a displacement sensor, the force sensor is used for detecting the loading force borne by the thrust disc, and the displacement sensor is used for detecting the displacement of the thrust disc. According to the corrugated foil rigidity testing equipment for the foil air bearing, the corrugated foil to be tested can be placed on the testing table, the driving part of the loading mechanism pushes the thrust disc to move so as to extrude the corrugated foil on the testing table, and in the extrusion process, the loading force and displacement of the thrust disc are detected through the force sensor and the displacement sensor of the sensing module, so that the rigidity of the corrugated foil can be detected.)

1. A bump foil stiffness test apparatus for a foil air bearing, comprising:

the test bench is used for bearing the bump foil of the foil air bearing;

the loading mechanism comprises a driving part and a thrust disc, wherein the driving part is connected to the thrust disc and is used for driving the thrust disc to press the bump foil on the test board;

and the sensing module comprises a force sensor and a displacement sensor, the force sensor is used for detecting the loading force borne by the thrust disc, and the displacement sensor is used for detecting the displacement of the thrust disc so as to test the rigidity of the bump foil through the loading force and the displacement detected by the force sensor.

2. The foil stiffness test apparatus of the foil air bearing of claim 1, wherein the drive member comprises:

a drive gear;

the drive rack, connect in the thrust dish, the drive rack is equipped with a plurality of edges the teeth of a cogwheel that thrust dish moving direction set up, the teeth of a cogwheel with drive gear engagement when drive gear rotates, the drive rack drives the thrust dish removes in order to extrude the ripples paper tinsel.

3. The foil stiffness test apparatus of the foil air bearing of claim 2 wherein the drive assembly further comprises a drive motor coupled to the drive gear to drive the drive gear in rotation.

4. The foil stiffness test apparatus of the foil air bearing of claim 3 further comprising a frame and a first bushing, the drive motor and the first bushing being coupled to the frame, the drive rack being movably coupled to the frame by the first bushing for movement under drive of the drive gear.

5. The foil stiffness test apparatus of the foil air bearing of claim 4 wherein the drive member further comprises a spherical joint having one end connected to the drive rack and the other end connected to the thrust disc.

6. The foil stiffness test apparatus of the foil air bearing of claim 5 wherein the force sensor is disposed between the spherical joint and the thrust disk, the spherical joint being coupled to the thrust disk via the force sensor to detect a loading force of the thrust disk.

7. The foil stiffness test apparatus of the foil air bearing of claim 6, wherein the test station comprises a support frame and a placement for carrying the foil; the displacement sensor is a plurality of, movably the support frame and with the thrust dish is connected in order to detect the displacement of thrust dish.

8. The foil stiffness test apparatus of the foil air bearing of claim 7, wherein the support frame includes a connection portion disposed in parallel above the placement portion and a support portion connected to the connection portion to support the connection portion, the thrust plate is located between the connection portion and the placement portion, and the displacement sensor approaches the thrust plate through the connection portion to detect a displacement of the thrust plate.

9. The foil stiffness test apparatus of the foil air bearing of claim 8 wherein the support frame further comprises a second bushing, the second bushing being connected to the connection portion; the driving part further comprises a connecting rod, one end of the connecting rod is connected to the displacement sensor, and the other end of the connecting rod penetrates through the second shaft sleeve to be connected to the thrust disc.

10. The foil stiffness test apparatus of the foil air bearing of claim 9 wherein the frame includes a cavity, the support bracket is positioned within the cavity, and the drive rack is coupled to the spherical joint through the frame into the cavity.

Technical Field

The disclosure relates to the field of test equipment, in particular to wave foil rigidity test equipment of a foil air bearing.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The foil air bearing is used as a novel dynamic pressure air bearing, has the advantages of high rotating speed and rotation precision, small power consumption, no pollution, long service life, capability of working in severe working environment and the like of the traditional gas bearing, has the advantages of good adaptability, low requirement on manufacturing and assembling precision, good impact resistance, high stability, no need of a special lubricating and cooling system, low maintenance cost and the like, and is widely applied to high-speed rotating machinery such as air blowers, hydrogen fuel cell compressors, electronic turbochargers, airplane environment control systems { ACM), auxiliary power systems (APU), micro gas turbines, small aviation turbine engines and the like.

The performance test of foil air bearings comprises many items, and the test items are described in many documents in China. Wherein the stiffness of the bump foil is related to the foil air to bearing load capacity, directly affecting its performance. Therefore, it is important to design a device capable of accurately measuring the stiffness of the bump foil.

Disclosure of Invention

In view of the above, it is necessary to provide a bump stiffness test apparatus for a foil air bearing, which is used for assisting a test foil to control the stiffness of a bump of the bearing.

A bump foil stiffness test apparatus for a foil air bearing, comprising:

the test bench is used for bearing the bump foil of the foil air bearing;

the loading mechanism comprises a driving part and a thrust disc, wherein the driving part is connected to the thrust disc and is used for driving the thrust disc to press the bump foil on the test board;

and the sensing module comprises a force sensor and a displacement sensor, the force sensor is used for detecting the loading force borne by the thrust disc, and the displacement sensor is used for detecting the displacement of the thrust disc so as to test the rigidity of the bump foil through the loading force and the displacement detected by the force sensor.

Preferably, the driving part includes:

a drive gear;

the drive rack, connect in the thrust dish, the drive rack is equipped with a plurality of edges the teeth of a cogwheel that thrust dish moving direction set up, the teeth of a cogwheel with drive gear engagement when drive gear rotates, the drive rack drives the thrust dish removes in order to extrude the ripples paper tinsel.

Preferably, the driving component further comprises a driving motor, and the driving motor is connected to the driving gear to drive the driving gear to rotate.

Preferably, the device further comprises a machine frame and a first shaft sleeve, the driving motor and the first shaft sleeve are connected to the machine frame, and the driving rack is movably connected to the machine frame through the first shaft sleeve to move under the driving of the driving gear.

Preferably, the driving part further comprises a spherical joint, one end of the spherical joint is connected to the driving rack, and the other end of the spherical joint is connected to the thrust disc.

Preferably, the force sensor is arranged between the spherical joint and the thrust disc, so that the spherical joint is connected to the thrust disc through the force sensor to detect the loading force of the thrust disc.

Preferably, the test bench comprises a support frame and a plurality of displacement sensors, wherein the support frame is movably connected with the thrust disc to detect the displacement of the thrust disc, and the object placing part is used for bearing the wave foil.

Preferably, the support frame includes a connection portion and a support portion, the connection portion is disposed above the object placing portion in parallel, the support portion is connected to the connection portion to support the connection portion, the thrust plate is located between the connection portion and the object placing portion, and the displacement sensor is connected to the thrust plate through the connection portion.

Preferably, the support frame includes a connecting portion and a supporting portion, the connecting portion is disposed above the object placing portion in parallel, the supporting portion is connected to the connecting portion to support the connecting portion, the thrust plate is located between the connecting portion and the object placing portion, and the displacement sensor passes through the connecting portion and approaches the thrust plate to detect a displacement of the thrust plate.

Preferably, the rack comprises a cavity, the support frame is located in the cavity, and the driving rack penetrates through the rack into the cavity and is connected to the spherical joint.

Compared with the prior art, the wavy foil rigidity testing equipment for the foil air bearing can place a wavy foil to be tested on a test board, the driving part of the loading mechanism pushes the thrust disc to move so as to extrude the wavy foil on the test board, and the loading force and displacement of the thrust disc are detected through the force sensor and the displacement sensor of the sensing module in the extrusion process, so that the rigidity of the wavy foil can be detected.

Drawings

In order to illustrate the embodiments more clearly, the drawings that will be needed in the description of the embodiments will be briefly described below, it being apparent that the drawings in the following description are some examples of the disclosure, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.

Fig. 1 is a schematic structural diagram of a wave foil rigidity testing device.

Fig. 2 is a schematic structural view of the loading mechanism.

Fig. 3 is a schematic diagram of the test stand and displacement sensor.

Description of the main elements

The following detailed description will further illustrate the disclosure in conjunction with the above-described figures.

Detailed Description

In order that the above objects, features and advantages of the present disclosure can be more clearly understood, a detailed description of the present disclosure will be given below with reference to the accompanying drawings and detailed description. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present disclosure, and the described embodiments are merely a subset of the embodiments of the present disclosure, rather than a complete embodiment. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure.

In various embodiments, for convenience in description and not limitation of the disclosure, the term "coupled" as used in the specification and claims of the present disclosure is not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

Fig. 1 is a schematic structural diagram of a wave foil rigidity testing device. As shown in fig. 1, the apparatus for testing the wave foil stiffness of a foil air bearing comprises a test station 40, a loading mechanism 20 and a sensing module. The test station 40 is used for carrying the bump foil of the foil air bearing, and the loading mechanism 20 is used for applying a loading force to the bump foil positioned on the test station 40. The sensing module is used for detecting the loading force born by the wave foil and the displacement generated under the action of the loading force, so that the rigidity parameter of the wave foil can be detected according to the loading force and the displacement data.

The rack 10 is used to carry the loading mechanism 20 and houses the test stand 40. In this embodiment, the frame 10 is substantially a frame-shaped structure, and has a cavity therein. The loading mechanism 20 is arranged at the top of the rack 10, the test table 40 is arranged in the cavity of the rack 10, and the loading mechanism 20 penetrates through the rack 10 from the top of the rack 10 into the cavity, so that the bump foil in the cavity can be tested. In some embodiments, the cavity may be closed, in other embodiments, the cavity may also be an open structure communicating with the outside, and a person skilled in the art may set the structure of the cavity as needed, which is not limited in this application.

Fig. 2 is a schematic structural view of the loading mechanism 20. As shown in fig. 2, the loading mechanism 20 is used to apply a loading force to the bump foil at the test station 40, and includes a drive component and a thrust disk 26. The driving component is connected to the thrust disc 26 for driving the thrust disc 26 to press the bump foil on the test table 40. In some embodiments, the drive components include a drive motor 21, a drive gear 23, and a drive rack 22. The driving motor 21 is installed on the top of the frame 10, and the output shaft is connected to the driving gear 23, so that the driving gear 23 can be driven to rotate. The drive rack 22 extends in a vertical direction and is connected at the bottom to said thrust disc 26. The driving rack 22 is provided with a plurality of gear teeth 222 arranged along the moving direction of the thrust disc 26, the gear teeth 222 are meshed with the driving gear 23, and when the driving gear 23 rotates, the driving rack 22 drives the thrust disc 26 to move so as to extrude the bump foil.

In this embodiment, the top surface of the frame 10 is provided with a first bushing 221, one end of the driving rack 22 is located above the frame 10 and is engaged with the driving gear 23 through the gear teeth 222, and the other end is movably connected to the frame 10 through the first bushing 221 to move under the driving of the driving gear 23. Thus, the driving rack 22 can move in the vertical direction under the support of the first bushing 221, so that the driving rack 22 can be prevented from being deformed in the pressing process, and the testing accuracy is better.

Further, in some embodiments, the drive component also includes a spherical joint 25 and a connecting rod 24. The spherical joint 25 (also known as a spherical compensator or spherical joint) absorbs or compensates for lateral displacement in one or more directions by virtue of the angular displacement of the sphere, so that the two components connecting the spherical joint 25 have good adaptability. In this embodiment, one end of the spherical joint 25 is connected to the driving rack 22, and the other end is connected to the thrust plate 26 through a connecting rod 24. Specifically, the bottom of the drive rack 22 is connected to one end of a spherical joint 25, and the other end of the spherical joint 25 may be connected to a thrust disc 26 via a connecting rod 24.

As shown in fig. 1 and 2, the thrust disk 26 has a substantially flat plate-like structure and extends in the horizontal plane direction. The middle position of the thrust disc 26 is connected to the bottom of the connecting rod 24, so that when the driving rack 22 is driven by the driving motor 21 to move in the vertical direction, the driving rack can drive the thrust disc 26 to move in the vertical direction sequentially through the spherical joint 25 and the connecting rod 24, and in the rigidity testing process, a loading force is applied to the corrugated foil.

Fig. 3 is a schematic diagram of the structure of test stand 40 and displacement sensor 31. As shown in fig. 3, the test bench 40 is disposed in a cavity of the rack 10, and the driving rack 22 passes through the rack 10 into the cavity to be connected to the spherical joint 25. The testing table 40 includes a supporting frame 42 and a placing part 41. The placing part 41 is a flat structure extending along the horizontal direction, is located below the thrust disc 26, and is used for bearing and fixing the wave foil to be tested. The support frame 42 is used for further supporting the connecting rod 24 and the displacement sensor 31, and includes a connecting portion and a supporting portion 422. The connecting portion has a flat plate-like structure extending substantially in the horizontal direction, and is provided above the storage portion 41 in parallel. The supporting portion 422 is connected to the connecting portion to support the connecting portion, and forms a structure of a shape like a Chinese character 'men' with the connecting portion. Thus, the thrust plate 26 is located between the connecting portion and the placement portion 41. To enable support of the connecting rod 24, in some embodiments, the support bracket 42 further includes a second bushing 241, the second bushing 241 being connected to the connecting portion. The connecting rod 24 has one end connected to the displacement sensor 31 and the other end connected to the thrust plate 26 through the second bushing 241, so that the connecting rod 24 can move in the vertical direction in the second bushing 241 supported by the second bushing 241.

Referring back to fig. 2 and 3, the sensing module includes a force sensor 30 and a displacement sensor 31. The force sensor 30 is used for detecting the loading force carried by the thrust disc 26, and the displacement sensor 31 may be an eddy current displacement sensor for detecting the displacement of the thrust disc 26, so as to test the rigidity of the bump foil through the loading force and the displacement detected by the force sensor 30.

As shown in fig. 2, the force sensor 30 is a device for converting the magnitude of the force into a related electrical signal, in the present embodiment, the force sensor 30 is disposed between the spherical joint 25 and the connecting rod 24, that is, the end of the spherical joint 25 is connected to one end of the force sensor 30, and the other end of the force sensor 30 is connected to the connecting rod 24, so that the driving rack 22 can be transmitted to the connecting rod 24 through the force sensor 30, and then the loading force is applied to the bump foil through the thrust disk 26, so that the force sensor 30 is flexibly connected to the thrust disk 26, and the force sensor 30 can detect the magnitude of the loading force applied to the bump foil.

As shown in fig. 2 and 3, the displacement sensors 31 are two in number, extend in parallel in the vertical direction, and are connected at the ends to the thrust disk 26 so that the displacement of the thrust disk 26 can be detected following the movement of the thrust disk 26. In the present embodiment, the plurality of displacement sensors 31 are movably connected to the support frame 42 and the thrust disk 26 to detect the displacement of the thrust disk 26. Preferably, the top of the displacement sensor 31 passes through the connection portion, and the probe of the displacement sensor 31 is close to the thrust disk 26.

In use, the bump foil is placed on the placement part 41 of the test table 40. Then, the driver controls the driving motor 21 to rotate, the driving motor 21 drives the driving rack 22 to move in the vertical direction through the driving gear 23, the driving rack 22 drives the connecting rod 24 to move through the force sensor 30, and the thrust disc 26 is driven to descend through the connecting rod 24.

In the process that the thrust plate 26 presses the bump foil on the placement part 41, the force sensor 30 can acquire the loading force applied by the thrust plate 26, and the displacement sensor 31 can also acquire displacement data of the thrust plate 26.

And finally, transmitting the loading force acquired by the force sensor 30 and the displacement data acquired by the displacement sensor 31 to a computer to finish the rigidity test of the wave foil.

The wavy foil rigidity testing equipment for the foil air bearing can place a wavy foil to be tested on the test bench 40, the driving part of the loading mechanism 20 pushes the thrust disc 26 to move so as to extrude the wavy foil on the test bench 40, and the loading force and displacement of the thrust disc 26 are detected through the force sensor 30 and the displacement sensor 31 of the sensing module in the extrusion process, so that the rigidity of the wavy foil can be detected. In addition, the driving rack 22 is driven to move by the driving motor 21 and the driving gear 23, so that the movement precision in loading force can be ensured, meanwhile, the foils are convenient to take and place, and the testing efficiency is greatly improved.

In several embodiments provided in the present disclosure, it will be apparent to those skilled in the art that the present disclosure is not limited to the details of the above-described exemplary embodiments, and can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the disclosure being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. The terms first, second, etc. are used to denote names, but not any particular order.

Although the present disclosure has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the present disclosure.