CN116256172A - A dynamic pressure gas thrust foil bearing test bench based on air dynamic pressure foil bearing ultra-high speed motor - Google Patents

Abstract

The application discloses dynamic pressure gas thrust foil bearing test bench based on air dynamic pressure foil bearing ultra-high speed motor includes: the detection unit is provided with a dynamic pressure gas thrust foil bearing and is used for detecting axial loading force and friction moment of the dynamic pressure gas thrust foil bearing; the motor comprises a shell, a motor shaft, a dynamic pressure gas radial foil bearing and a dynamic and static pressure mixed gas thrust foil bearing, wherein the motor shaft is rotatably arranged in the shell through the dynamic pressure gas radial foil bearing; and the thrust disc is connected with the end part of the motor shaft. According to the motor, the motor shaft of the motor is supported through the dynamic pressure gas radial foil bearing, so that the friction force in the rotation process of the motor can be reduced, the rotating speed of the motor can be increased, and the performance simultaneous test of the dynamic pressure gas thrust foil bearing and the dynamic and static pressure mixed gas thrust foil bearing can be realized.

Description

A dynamic pressure gas thrust foil based on air dynamic pressure foil bearing ultra-high speed motor Bearing test bench

technical field

The invention relates to the technical field of pneumatic bearing testing, in particular to a dynamic pressure gas thrust foil bearing test bench based on an air dynamic pressure foil bearing ultra-high-speed motor.

Background technique

Gas-lubricated bearings have the advantages of low viscosity of gas-lubricated medium, low friction, high rotation accuracy, and low power consumption. They have broad application prospects in high-precision fields and turbomachinery. After the existing air thrust foil bearing design sample preparation is completed, tests such as friction power consumption, friction torque, and load-carrying capacity need to be performed on the bearing test bench, and then the bearing design parameters are adjusted according to the test results until the design requirements are met. At this stage, with the vigorous development of hydrogen energy, hydrogen fuel cell air compressor technology is also constantly making breakthroughs. However, there are also many difficulties. For example, the existing dynamic pressure gas thrust foil bearing test bench based on rolling bearing motors has a low speed and cannot correspond to the dynamic pressure gas thrust foil bearing test bench in the ultra-high speed environment corresponding to the hydrogen fuel cell air compressor. The static performance of push foil bearings is studied.

Contents of the invention

The invention at least solves the problem that the rotating speed of the rolling bearing motor is low in the test process of the dynamic pressure gas thrust foil bearing, which cannot satisfy the static performance research of the dynamic pressure gas thrust foil bearing under the ultra-high speed environment.

This application provides a dynamic pressure gas thrust foil bearing test bench based on an air dynamic pressure foil bearing ultra-high speed motor, including:

The detection unit is equipped with a dynamic pressure gas thrust foil bearing, which is used to detect the axial loading force and friction moment of the dynamic pressure gas thrust foil bearing;

The motor includes a shell, a motor shaft, a dynamic pressure gas radial foil bearing and a dynamic and static pressure mixed gas thrust foil bearing. The thrust foil bearing is set in the housing, and the motor shaft is set through the thrust foil bearing of the mixed gas of dynamic and static pressure;

The thrust plate is connected with the end of the motor shaft, the thrust plate is arranged between the dynamic pressure gas thrust foil bearing and the dynamic and static pressure mixed gas thrust foil bearing, and the dynamic pressure gas thrust foil bearing and the dynamic and static pressure The mixed gas thrust foil bearings are arranged at intervals with the thrust plate respectively.

The detection unit of this application is equipped with a dynamic pressure gas thrust foil bearing for testing and testing. When the motor rotates, the detection unit can detect the axial force and frictional moment of the pneumatic pressure foil thrust bearing, and the motor The motor shaft is supported by the dynamic pressure gas radial foil bearing and the dynamic and static pressure mixed gas thrust foil bearing, that is, the motor shaft is supported by the air dynamic pressure foil bearing, which can reduce the friction force during the rotation of the motor. Increase the speed of the motor to achieve the operation of the motor at an ultra-high speed (20000r/min-150000r/min). Compared with the structure of ordinary rolling bearings, the speed of the motor can be increased, and the dynamic pressure gas thrust foil bearing can be simulated. The mechanical properties at high speed, and the dynamic and static pressure mixed gas thrust foil bearing can also be used as the companion bearing to test the performance parameters, so as to realize the dynamic pressure gas thrust foil bearing and the dynamic and static pressure mixed gas thrust The performance of foil bearings was tested simultaneously.

In some embodiments, the dynamic pressure gas thrust foil bearing test bench further includes a loading device, which is located on the side of the detection unit away from the detection unit along the axial direction of the motor, and the loading device is connected to the detection unit. The detection unit is arranged against and used for providing axial loading force to the dynamic pressure gas thrust foil bearing.

The loading device can apply force along the axial direction of the motor to the detection unit to test the axial force of the dynamic pressure gas thrust foil bearing, and the loading device can apply different axial forces to the dynamic pressure gas thrust foil bearing to The performance of hydrodynamic gas thrust foil bearings under different axial forces was tested.

In some embodiments, the detection unit includes:

base;

a connecting piece slidably connected to the base;

The bearing seat is rotatably connected to the connecting piece, the dynamic pressure gas thrust foil bearing is installed on the bearing seat, and the axis of rotation of the bearing seat relative to the connecting piece is parallel to the axis of the motor;

A pressure detection element is arranged on the side of the connecting member away from the motor along the axial direction of the motor, and the pressure detection element is arranged against the loading device.

The bearing seat is equipped with a dynamic pressure gas thrust foil bearing, and the dynamic pressure gas thrust foil bearing and the thrust plate are arranged in a gap, and the thrust plate is driven by a motor to rotate to simulate the dynamic pressure gas thrust foil bearing when it is working. Through the setting of the pressure detection element, the pressure applied by the loading device can be obtained in real time, so as to know the performance of the dynamic pressure gas thrust foil bearing under different axial forces.

In some embodiments, the loading device includes an electric push rod, and the execution end of the electric push rod is set against the pressure detection element.

The axial force applied to the hydrodynamic gas thrust foil bearing can be better controlled by electric actuator.

In some embodiments, the electric push rod is a stepping electric push rod or a servo electric push rod.

Stepping electric pushrod or servo electric pushrod can more accurately control the axial force applied to the dynamic pressure gas thrust foil bearing, so as to more accurately measure the dynamic pressure gas thrust foil bearing under different loads performance.

In some embodiments, the detection unit further includes a torque measuring mechanism connected to the bearing housing for measuring the frictional torque of the dynamic pressure gas thrust foil bearing.

In some embodiments, the torque measuring mechanism includes:

bracket;

a connecting rod, one end of the connecting rod is connected to the bearing seat;

The force sensor is arranged on the support, and the detection end of the force sensor is connected with the other end of the connecting rod.

In some embodiments, the dynamic pressure gas thrust foil bearing test bench further includes a controller and a memory, the memory, the force sensor and the pressure detection element are respectively connected to the controller in communication, and the controller is used to obtain the detection results of the force sensor and the pressure detection element data, and store the detected data in memory.

In some embodiments, the rotation speed of the motor is 20000r/min-150000r/min.

Description of drawings

Fig. 1 schematically shows an axonometric view of a dynamic pressure gas thrust foil bearing test bench according to an embodiment of the present application;

Fig. 2 schematically shows a side view of a dynamic pressure gas thrust foil bearing test bench according to an embodiment of the present application;

Fig. 3 schematically shows an isometric view of the connection between the motor and the thrust plate of the dynamic pressure gas thrust foil bearing test bench according to an embodiment of the present application;

Fig. 4 is the sectional view of Fig. 3;

Fig. 5 is a partial sectional view of Fig. 4;

Fig. 6 exemplarily shows an axonometric view of a thrust plate of a dynamic pressure gas thrust foil bearing test bench according to an embodiment of the present application;

Fig. 7 schematically shows an isometric view of a bolt of a motor according to an embodiment of the present application.

Reference signs:

Detection unit 10; base 11; connector 12; bearing seat 13; pressure detection element 14; torque measuring mechanism 15; connecting rod 151; force sensor 152; thrust plate 20; motor 30; motor shaft 31; Foil bearing 32; dynamic and static pressure mixed gas thrust foil bearing 33; housing 34; bolt 35; loading device 40; electric push rod 41.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise, "multiple" generally includes At least two, but the inclusion of at least one is not excluded.

It should be understood that the term "and/or" used herein is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B, which may mean that A exists alone, and A and B exist simultaneously. B, there are three situations of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

It should also be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a good or system comprising a set of elements includes not only those elements but also includes items not expressly listed. other elements of the product, or elements inherent in the commodity or system. Without further limitations, an element qualified by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the article or system comprising the element.

The present invention will be described in further detail below in conjunction with the accompanying drawings: the present embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation has been provided, but the protection scope of the present invention is not limited to the following embodiments.

As shown in FIGS. 1-7 , according to an embodiment of the present invention, a dynamic pressure gas thrust foil bearing test bench is proposed, including a detection unit 10 , a motor 30 and a thrust plate 20 . Wherein, the detection unit 10 is installed with a dynamic pressure gas thrust foil bearing for detecting the axial loading force and frictional moment of the dynamic pressure gas thrust foil bearing. The motor 30 includes a housing 34, a motor shaft 31, a dynamic pressure gas radial foil bearing 32 and a dynamic and static pressure mixed gas thrust foil bearing 33, and the motor shaft 31 is rotatably arranged on the casing through the dynamic pressure gas radial foil bearing 32. Inside the body 34 , a thrust foil bearing 33 of a mixed gas under dynamic and static pressure is arranged in the housing 34 , and the motor shaft 31 is arranged through the mixed gas under dynamic and static pressure. The thrust plate 20 is connected to the end of the motor shaft 31, the thrust plate 20 is arranged between the dynamic pressure gas thrust foil bearing and the dynamic and static pressure mixed gas thrust foil bearing 33, and the dynamic pressure gas thrust foil bearing The thrust foil bearings 33 and the mixed gas under dynamic and static pressure are spaced apart from the thrust plate 20 respectively.

Specifically, the motor shaft 31 is provided with a rotor, and the housing 34 is also provided with a stator that rotates with the rotor. This is the prior art and will not be described in detail here.

Specifically, optionally, the end of the thrust plate 20 and the motor shaft 31 may be connected by bolts 35 , and the axis of the thrust plate 20 and the axis of the motor shaft 31 are arranged coaxially.

Since the dynamic pressure gas thrust foil bearing is in operation, the flat foil of the dynamic pressure gas thrust foil bearing and the thrust plate 20 are arranged in a gap. Therefore, the gap between the thrust plate 20 and the flat foil of the dynamic pressure gas thrust foil bearing can be set to be the same as the working gap when the dynamic pressure gas thrust foil bearing is working, so as to measure the dynamic pressure gas thrust foil bearing. Performance of push foil bearings at different speeds.

The detection unit 10 of the present application is equipped with a dynamic pressure gas thrust foil bearing for testing and testing. When the motor 30 rotates, the detection unit 10 can detect the axial force and frictional moment of the pneumatic pressure foil thrust bearing. , and the motor shaft 31 of the motor 30 is supported by a dynamic pressure gas radial foil bearing 32, which can reduce the friction force during the rotation of the motor 30 and increase the speed of the motor 30. Compared with the structure using ordinary rolling bearings, it can Increasing the speed of the motor 30 can simulate the mechanical properties of the dynamic pressure gas thrust foil bearing at high speed, and also use the dynamic and static pressure mixed gas thrust foil bearing 33 as an accompanying test bearing to test its performance parameters, in order to Simultaneous testing of the performance of the dynamic pressure gas thrust foil bearing and the dynamic and static pressure mixed gas thrust foil bearing 33 is realized.

In some embodiments, as shown in FIGS. 1-2 , the dynamic pressure gas thrust foil bearing test bench further includes a loading device 40, which is located on the side of the detection unit 10 away from the detection unit 10 along the axis direction of the motor 30. The device 40 is arranged against the detection unit 10, and is used for providing an axial loading force to the dynamic pressure gas thrust foil bearing.

The loading device 40 can apply a force along the direction of the motor shaft 31 to the detection unit 10 to test the axial force of the dynamic pressure gas thrust foil bearing, and the loading device 40 can apply different axial forces to the dynamic pressure gas thrust foil bearing. axial force to test the performance of the dynamic pressure gas thrust foil bearing under different axial forces.

In some embodiments, as shown in FIGS. 1-2 , the detection unit 10 includes a base 11 , a connecting piece 12 and a bearing seat 13 . Wherein, the connecting member 12 is slidably connected to the base 11 . The bearing seat 13 is rotatably connected to the connector 12 , and the bearing seat 13 is equipped with a dynamic pressure gas thrust foil bearing. The axis of rotation of the bearing seat 13 relative to the connector 12 is parallel to the axis of the motor 30 . The pressure detection element 14 is arranged on the side of the connecting member 12 away from the motor 30 along the axis direction of the motor 30 , and the pressure detection element 14 is disposed against the loading device 40 .

The pressure detection element 14 may be a pressure sensor 152 .

Optionally, the connecting piece 12 is a shaft, the base 11 is provided with a U-shaped groove, the connecting piece 12 is arranged in the U-shaped groove, and can slide in the U-shaped groove. In other embodiments, the connecting member 12 is slidably connected to the base 11 through guide rails.

The bearing seat 13 is equipped with a dynamic pressure gas thrust foil bearing, and the dynamic pressure gas thrust foil bearing and the thrust plate 20 are arranged in a gap, and the thrust plate 20 is driven to rotate by the motor 30 to simulate the dynamic pressure gas thrust foil For the running condition of the bearing during operation, the pressure applied by the loading device 40 can be obtained in real time through the setting of the pressure detection element 14, so as to know the performance of the dynamic pressure gas thrust foil bearing under different axial forces.

In some embodiments, as shown in FIG. 1 , the loading device 40 includes an electric push rod 41 , and the execution end of the electric push rod 41 is set against the pressure detection element 14 .

The axial force applied to the dynamic pressure gas thrust foil bearing can be better controlled by the electric push rod 41 .

In other embodiments, the loading device 40 is a push rod cylinder.

In some embodiments, the electric push rod 41 is a stepping electric push rod or a servo electric push rod.

Compared with the structure using the cylinder, the axial force applied to the dynamic pressure gas thrust foil bearing can be more accurately controlled, so that the performance of the dynamic pressure gas thrust foil bearing under different loads can be measured more accurately.

In some embodiments, as shown in FIGS. 1-2 , the detection unit 10 further includes a torque measuring mechanism 15 connected to the bearing housing 13 for measuring the frictional torque of the dynamic pressure gas thrust foil bearing.

The torque measuring mechanism 15 can measure the friction torque of the dynamic pressure gas thrust foil bearing at different speeds of the motor 30, so as to determine the friction torque parameters of the dynamic pressure gas thrust foil bearing under different working conditions.

In some embodiments, as shown in FIGS. 1-2 , the torque measuring mechanism 15 includes a bracket, a connecting rod 151 and a force sensor 152 . Wherein, one end of the connecting rod 151 is connected with the bearing seat 13 . The force sensor 152 is arranged on the bracket (the bracket is not shown in the figure), and the detection end of the force sensor 152 is connected with the other end of the connecting rod 151 .

Specifically, the connecting rod 151 can be an L-shaped rod, or the connecting rod 151 includes a first connecting rod 151 and a second connecting rod 151, the first connecting rod 151 and the second connecting rod 151 are hinged, and the first connecting rod 151 and the bearing cluster connected, the second connecting rod 151 is connected to the detection end of the force sensor 152 . The first connecting rod 151 and the second connecting rod 151 are arranged at an angle, wherein the first connecting rod 151 and the second connecting rod 151 are vertically better, and can be more directly based on the pressure measured by the force sensor 152 and the pressure of the connecting rod 151. The friction torque is calculated from the rod length.

In some embodiments, the dynamic pressure gas thrust foil bearing test bench further includes a controller and a memory, the memory, the force sensor 152 and the pressure detection element 14 are respectively connected to the controller in communication, and the controller is used to obtain the force sensor 152 and pressure detection The detection data of the component 14 is stored in the memory.

The controller can be a single-chip microcomputer or a computer processor, which is not specifically limited here.

In some embodiments, the rotation speed of the motor 30 is 20000r/min-150000r/min, so that the simulated performance test of the ultra-high rotation speed of the dynamic pressure gas thrust foil bearing can be performed.

Exemplary embodiments of the present disclosure have been specifically shown and described above. It should be understood that the disclosure is not limited to the detailed structures, arrangements or methods of implementation described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (9)

1. Dynamic pressure gas thrust foil bearing test bed based on air dynamic pressure foil bearing ultra-high speed motor, characterized by comprising:

the detection unit is provided with the dynamic pressure gas thrust foil bearing and is used for detecting axial loading force and friction moment of the dynamic pressure gas thrust foil bearing;

the motor comprises a shell, a motor shaft, a dynamic pressure gas radial foil bearing and a dynamic and static pressure mixed gas thrust foil bearing, wherein the motor shaft is rotatably arranged in the shell through the dynamic pressure gas radial foil bearing, the dynamic and static pressure mixed gas thrust foil bearing is arranged in the shell, and the motor shaft is arranged through the dynamic and static pressure mixed gas thrust foil bearing;

the thrust disc is connected with the end part of the motor shaft, and is arranged between the dynamic pressure gas thrust foil bearing and the dynamic and static pressure mixed gas thrust foil bearing, and the dynamic pressure gas thrust foil bearing and the dynamic and static pressure mixed gas thrust foil bearing are respectively arranged at intervals with the thrust disc.

2. The dynamic pressure gas thrust foil bearing test stand based on an air dynamic pressure foil bearing ultra-high speed motor according to claim 1, further comprising a loading device located at a side of the detection unit away from the detection unit along an axial direction of the motor, wherein the loading device is arranged to abut against the detection unit for providing an axial loading force to the dynamic pressure gas thrust foil bearing.

3. The dynamic pressure gas thrust foil bearing stand of claim 2, wherein the detection unit comprises:

a base;

the connecting piece is connected with the base in a sliding way;

the bearing seat is rotatably connected with the connecting piece, the dynamic pressure gas thrust foil bearing is arranged on the bearing seat, and the rotating axis of the bearing seat relative to the connecting piece is parallel to the axis of the motor;

the pressure detection element is arranged on one side, away from the motor, of the connecting piece along the axial direction of the motor, and the pressure detection element is propped against the loading device.

4. A hydrodynamic gas thrust foil bearing test bed based on an aerodynamic foil bearing ultra-high speed motor as claimed in claim 3, wherein said loading means comprises an electric push rod, the actuating end of which is disposed against said pressure detecting element.

5. The dynamic pressure gas thrust foil bearing test stand based on the ultra-high speed motor of the aerodynamic foil bearing of claim 4, wherein the electric push rod is a stepping electric push rod or a servo electric push rod.

6. The dynamic pressure gas thrust foil bearing test stand based on an air dynamic pressure foil bearing ultra-high speed motor according to any one of claims 3-5, wherein the detection unit further comprises a moment measuring mechanism connected with the bearing housing for measuring a friction moment of the dynamic pressure gas thrust foil bearing.

7. The dynamic pressure gas thrust foil bearing test stand based on an air dynamic pressure foil bearing ultra-high speed motor of claim 6, wherein the torque measurement mechanism comprises:

a bracket;

one end of the connecting rod is connected with the bearing seat;

the force sensor is arranged on the bracket, and the detection end of the force sensor is connected with the other end of the connecting rod.

8. The hydrodynamic gas thrust foil bearing test stand based on an aerodynamic foil bearing ultra-high speed motor of claim 7, further comprising a controller and a memory, wherein the memory, the force sensor and the pressure detection element are communicatively connected to the controller, respectively, and wherein the controller is configured to obtain detection data of the force sensor and the pressure detection element, and store the detection data in the memory.

9. The dynamic pressure gas thrust foil bearing test stand based on the ultra-high speed motor of the aerodynamic foil bearing according to claim 1, wherein the rotational speed of the motor is 20000r/min-150000r/min.

Images