Rotor axial force loading device and method and rotor testing device

Abstract

The invention provides a rotor axial force loading device and method and a rotor test device, and relates to the technical field of aero-engine tests. The rotor axial force loading device comprises a polarization disc and a magnetic force generation structure, the polarization disc has a preset magnetic field direction, and the polarization disc is used for being fixedly connected with the rotor. The magnetic force generation structure is arranged on one side of the polarization disc and is used for generating a magnetic field with the same or opposite direction as a preset magnetic field, so that axial force is generated through the mutual attraction or repulsion interaction of the polarization disc and the magnetic force generation structure, and positive axial force can be generated when the polarization disc and the magnetic force generation structure attract each other; when the polarization disc and the magnetic force generate structural repulsion, reverse axial force can be generated, and the axial force loading requirement during the rotor test is met. According to the rotor axial force loading device, the axial force with the controllable direction is applied to the rotor through the magnetic force, an air pressure system does not need to be arranged, and the problem caused by applying the axial force through the air pressure system is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine tests, and more particularly, to a rotor axial force loading device, a method, and a rotor test device. Background Art

[0002] High-speed motors have low power. When conducting high-speed rotor vibration tests, a vacuum chamber is generally used to reduce the gas load under high-speed rotation of the rotor to solve this problem. In addition, the bearings need a certain axial force to ensure safety.

[0003] Traditional rotor test pieces generally design a balance disk to form a balance chamber, and adjust the axial force by changing the chamber pressure. Although this method is feasible in a vacuum environment, its economy is extremely poor. The reason is that the cost of obtaining a high vacuum itself is extremely high. When trying to obtain a relatively high axial force at the same time, compressed air needs to be supplied to the balance chamber. Under the current mainstream rotor-stator sealing structure (labyrinth seals such as labyrinth teeth), the air leakage is relatively serious, so that a relatively high chamber pressure cannot be formed. Moreover, this inevitable air leakage poses a great challenge to the working condition of high vacuum. In practical applications, the vacuum pump has to work continuously, wasting a huge amount of energy and often causing the vacuum pump to overheat and the test to be aborted. Summary of the Invention

[0004] The following presents a brief overview of one or more aspects to provide a basic understanding of these aspects. This overview is not an exhaustive survey of all contemplated aspects, and is neither intended to identify key or critical elements of all aspects nor to attempt to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that follows.

[0005] The object of the present invention is to provide a rotor axial force loading device, which can solve the problems in the prior art that when using gas to load the axial force in a vacuum environment, the axial force is small and uncontrollable, and serious air leakage causes the vacuum pump to stop and even forces the test to be aborted.

[0006] The object of the present invention is also to provide a rotor test device, which can solve the problems in the prior art that when using gas to load the axial force in a vacuum environment, the axial force is small and uncontrollable, and serious air leakage causes the vacuum pump to stop and even forces the test to be aborted.

[0007] The object of the present invention is further to provide a rotor axial force loading method, which can solve the problems in the prior art that when using gas to load the axial force in a vacuum environment, the axial force is small and uncontrollable, and serious air leakage causes the vacuum pump to stop and even forces the test to be aborted.

[0008] Embodiments of the present invention can be implemented in the following manner:

[0009] A rotor axial force loading device for applying an axial force to a rotor, the rotor axial force loading device comprising:

[0010] A polarization disk having a preset magnetic field direction and configured to be fixedly connected to the rotor; and

[0011] A magnetic force generating structure disposed on one side of the polarization disk and configured to generate a magnetic field that is the same as or opposite to the preset magnetic field direction, so that a repulsive axial force or an attractive axial force is generated between the polarization disk and the magnetic force generating structure.

[0012] Optionally, the magnetic force generating structure includes a magnetic force generating unit and a current control unit. The current control unit is electrically connected to the magnetic force generating unit to control the direction and magnitude of the current obtained by the magnetic force generating unit. The magnetic force generating unit is configured to generate a magnetic field that is the same as or opposite to the preset magnetic field direction.

[0013] Optionally, the polarization disk is annular, and the number of the magnetic force generating units is multiple. The multiple magnetic force generating units are uniformly distributed along the circumferential direction of the polarization disk to form a magnetic force generating unit group.

[0014] Optionally, the magnetic force generating structure includes multiple magnetic force generating unit groups that are radially distributed along the polarization disk; the current control unit has multiple output interfaces, and multiple magnetic force generating units in each magnetic force generating unit group are connected to the same output interface to independently control the current direction and magnitude of the multiple magnetic force generating unit groups through the current control unit.

[0015] Optionally, the distribution density of the magnetic force generating units in the magnetic force generating unit group near the axis of the polarization disk is greater than the distribution density of the magnetic force generating units in the magnetic force generating unit group far from the axis of the polarization disk.

[0016] Optionally, the magnetic force generating unit includes an AC-DC converter, a current stabilizer, and an electromagnetic head that are sequentially arranged and integrated into one body.

[0017] Optionally, the polarization disk has reinforcing ribs extending radially.

[0018] A rotor test device, the rotor test device includes a rotor, a first bearing, a second bearing, a fixed bracket, and the above-mentioned rotor axial force loading device; both axial ends of the rotor are rotatably supported on the fixed bracket through the first bearing and the second bearing respectively; the polarization disk of the rotor axial force loading device is fixedly connected to the rotor.

[0019] Optionally, the polarization disk is detachably connected to the rotor.

[0020] A rotor axial force loading method, the rotor axial force loading method includes:

[0021] Fix the polarization disk fixedly to the rotor; wherein, the polarization disk has a preset magnetic field direction;

[0022] Set the magnetic force generating structure at a preset position on one side of the polarization disk; the preset position includes the distance between the magnetic force generating structure and the polarization disk and the relative position of the magnetic force generating structure and the polarization disk in the radial direction;

[0023] Control the magnetic force generating structure to generate a magnetic field with a preset direction and magnitude, so as to generate an axial force with a preset direction and magnitude on the rotor through the interaction between the magnetic force generating structure and the polarization disk.

[0024] The beneficial effects of the rotor axial force loading device, method and rotor test device provided by the embodiments of the present invention include:

[0025] The embodiments of the present invention provide a rotor axial force loading device, which includes a polarization disk and a magnetic force generating structure. The polarization disk has a preset magnetic field direction, and the polarization disk is used for fixedly connecting with the rotor. The magnetic force generating structure is arranged on one side of the polarization disk, and the magnetic force generating structure is used for generating a magnetic field that is the same as or opposite to the preset magnetic field direction. In this way, an axial force is generated through the attractive or repulsive interaction between the polarization disk and the magnetic force generating structure. When the polarization disk and the magnetic force generating structure attract each other, a positive axial force can be generated. When the polarization disk and the magnetic force generating structure repel each other, a reverse axial force can be generated, meeting the axial force loading requirements during rotor testing. This rotor axial force loading device applies an axially controllable force to the rotor through magnetic force, without the need to set up a pneumatic system, thus avoiding problems such as complex structure, uncontrollable axial force, and air leakage caused by applying axial force through a pneumatic system.

[0026] The embodiments of the present invention also provide a rotor test device. This rotor test device includes the above-mentioned rotor axial force loading device, so it also has the beneficial effects of simple structure, controllable axial force direction, and no problem of shutdown or test interruption caused by air leakage.

[0027] An embodiment of the present invention also provides a method for loading the axial force of a rotor, which includes fixedly connecting a polarization disk to the rotor; wherein, the polarization disk has a preset magnetic field direction; arranging a magnetic force generating structure at a preset position on one side of the polarization disk; the preset position includes the distance between the magnetic force generating structure and the polarization disk and the relative position of the magnetic force generating structure and the polarization disk in the radial direction; controlling the magnetic force generating structure to generate a magnetic field with a preset direction and magnitude, so as to generate an axial force with a preset direction and magnitude on the rotor through the interaction between the magnetic force generating structure and the polarization disk. Therefore, this method for loading the axial force of the rotor also has the beneficial effects of simple structure, controllable axial force direction, and no problem of shutdown or test interruption caused by air leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] After reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings, the above features and advantages of the present invention can be better understood. In the drawings, the components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0029] Figure 1 FIG. shows a schematic structural diagram of a rotor test device provided according to an aspect of the present invention;

[0030] Figure 2 FIG. shows a schematic structural diagram of the installed rotor axial force loading device provided according to an aspect of the present invention;

[0031] Figure 3 FIG. shows a schematic structural diagram of a magnetic force generating unit in the rotor axial force loading device provided according to an aspect of the present invention;

[0032] Figure 4 FIG. shows a schematic structural diagram of a current control unit in the rotor axial force loading device provided according to an aspect of the present invention.

[0033] REFERENCE NUMERALS:

[0034] 10 - Rotor test device; 100 - Rotor axial force loading device; 110 - Polarization disk; 120 - Magnetic force generating structure; 121 - Current control unit; 1211 - First output interface; 1212 - Second output interface; 1213 - Third output interface; 1214 - First display part; 1215 - Second display part; 1216 - Third display part; 122 - Magnetic force generating unit; 123 - AC / DC converter; 124 - Current stabilizer; 125 - Electromagnetic head; 126 - First magnetic force generating unit group; 127 - Second magnetic force generating unit group; 128 - Third magnetic force generating unit group; 211 - Rotor; 212 - First bearing; 213 - Second bearing; 214 - Fixed bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the aspects described below in conjunction with the accompanying drawings and specific embodiments are merely exemplary and should not be construed as imposing any limitation on the protection scope of the present invention.

[0036] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", "vertical", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0037] At the same time, it should be noted that if terms such as "first", "second", etc. are only used for differential description and should not be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should also be noted that unless otherwise clearly specified or limited, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the communication inside two elements, etc. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Figure 1 FIG. is a schematic structural diagram of the rotor test device 10 provided for this embodiment. Figure 2 FIG. is a schematic structural diagram after the installation of the rotor axial force loading device 100 provided for this embodiment. Please refer to Figure 1 and Figure 2 In this embodiment, a rotor axial force loading device 100 is provided. At the same time, a rotor test device 10 is also provided.

[0040] The rotor test device 10 includes a rotor axial force loading device 100, and also includes a rotor 211, a first bearing 212, a second bearing 213, and a fixed bracket 214. The axial ends of the rotor 211 are respectively rotatably supported on the fixed bracket 214 through the first bearing 212 and the second bearing 213. The polarization disk 110 of the rotor axial force loading device 100 is fixedly connected to the rotor 211. Thus, when a magnetic force along the axial direction is generated by the interaction between the polarization disk 110 and the magnetic force generating structure 120, this force is applied to the rotor 211 as an axial force through the polarization disk 110. Generally, one of the first bearing 212 and the second bearing 213 uses a ball bearing. In this embodiment, the first bearing 212 is a ball bearing.

[0041] Further, the polarization disk 110 is detachably connected to the rotor 211, so that the polarization disk 110 can be detached from the rotor 211 after the test is completed, realizing the reuse of the rotor axial force loading device 100, thereby effectively saving the test cost.

[0042] The rotor axial force loading device 100 includes a polarization disk 110 and a magnetic force generating structure 120. The polarization disk 110 has a preset magnetic field direction, that is, the polarization disk 110 has a magnetic field, and the direction of the magnetic field is preset according to requirements. The polarization disk 110 is used to be fixedly connected to the rotor 211. The magnetic force generating structure 120 is arranged on one side of the polarization disk 110, and the magnetic force generating structure 120 is used to generate a magnetic field that is the same as or opposite to the preset magnetic field direction. In this way, an axial force is generated through the attractive or repulsive interaction between the polarization disk 110 and the magnetic force generating structure 120. When the polarization disk 110 and the magnetic force generating structure 120 attract each other, a positive axial force can be generated. When the polarization disk 110 and the magnetic force generating structure 120 repel each other, a reverse axial force can be generated, meeting the axial force loading requirements during the test of the rotor 211. The rotor axial force loading device 100 applies an axially controllable axial force to the rotor 211 through magnetic force, without setting up a pneumatic system, thus avoiding problems such as complex structure, uncontrollable axial force, and air leakage caused by applying axial force through the pneumatic system.

[0043] In order to ensure that the magnetic force generated by the interaction between the polarization disk 110 and the magnetic force generating structure 120 can effectively act on the rotor 211 and provide an axial force for the rotor 211, during the test process, the position of the magnetic force generating structure 120 needs to be fixed. Specifically, since a fixing bracket 214 is provided in the rotor test device 10, the magnetic force generating structure 120 can be directly fixed through the fixing bracket 214. Or, in some other embodiments, a fixing member can also be additionally provided to fix the magnetic force generating structure 120 to the ground.

[0044] In this embodiment, the magnetic force generating structure 120 includes a magnetic force generating unit 122 and a current controller. The current control unit 121 is electrically connected to the magnetic force generating unit 122. By controlling the current direction and magnitude obtained by the magnetic force generating unit 122 through the power control unit, the magnitude and direction of the magnetic field generated by the magnetic force generating unit 122 are realized. When the magnetic field direction generated by the magnetic force generating unit 122 is the same as the preset magnetic field direction on the polarization disk 110, a repulsive magnetic force is generated between the magnetic force generating unit 122 and the polarization disk 110. This repulsive magnetic force causes the rotor 211 to receive a reverse axial force (that is, the horizontally leftward axial force as shown in Figure 1 ); when the magnetic field direction of the magnetic force generating unit 122 is opposite to the preset magnetic field direction on the polarization disk 110, an attractive magnetic force is generated between the magnetic force generating unit 122 and the polarization disk 110. This attractive magnetic force causes the rotor 211 to receive a positive axial force (that is, as shown inFigure 1 the horizontally rightward axial force shown

[0045] Figure 3 The structural schematic diagram of the magnetic force generating unit 122 in the rotor axial force loading device 100 provided in this embodiment is shown. Please refer to Figures 1-3 , optionally, the magnetic force generating unit 122 includes an AC-DC converter 123, a current stabilizer 124, and an electromagnetic head 125 arranged in sequence. The AC-DC converter 123 converts the alternating current input by the current control unit 121 into direct current, and then outputs stable direct current to the electromagnetic head 125 through the current stabilizer 124. After obtaining the stable direct current, the electromagnetic head 125 generates a stable magnetic field. The magnetic field generated by the electromagnetic head 125 repels or attracts the magnetic field of the polarization disk 110 to generate a forward or reverse axial force, and at the same time controls the magnitude of the axial force according to the magnitude of the current input by the current control unit 121.

[0046] Specifically, the magnetic force generating unit 122 is fixed by a fixing bracket 214, so that the magnetic force generating unit 122 is arranged at a suitable position of the polarization disk 110. The suitable position includes the distance between the magnetic force generating unit 122 and the polarization disk 110, and the position of the magnetic force generating unit 122 in the radial and circumferential directions of the polarization disk 110, etc.

[0047] In this embodiment, the current control unit 121 is the component with the highest power in the entire rotor axial force loading device 100. Therefore, in order to improve the reliability and safety of the entire device, the current stabilizer 124 and the AC-DC converter 123 are arranged in the magnetic force generating unit 122.

[0048] Furthermore, the number of the magnetic force generating units 122 is multiple, and the multiple magnetic force generating units 122 are evenly distributed along the circumferential direction of the polarization disk 110 to form a magnetic force generating unit group. In other words, a magnetic force generating unit group includes multiple magnetic force generating units 122 evenly distributed along the circumferential direction of the polarization disk 110. In this way, a uniform and stable magnetic field can be generated in the circumferential direction of the polarization disk 110 by one magnetic force generating unit group, ensuring the stable application of the axial force in the circumferential direction. At the same time, by setting multiple magnetic force generating units 122, a larger magnetic field adjustment range can be obtained to generate the required axial force.

[0049] Specifically, the polarization disk 110 is an annular member. After being mounted on the rotor 211, it is coaxially arranged with the rotor 211. In this way, the magnetic force generating unit group distributed in a circle around the circumference of the polarization disk 110 can provide a circumferentially uniform axial force. That is, in this embodiment, the magnetic force acting as the axial force generated between the magnetic force generating structure 120 and the polarization disk 110 is in a dot shape, and the axial force is the resultant force of multiple dot-shaped forces. Therefore, for the polarization disk 110, a multi-multiple frequency excitation of the rotor 211 will be introduced. To avoid the diametral vibration of the polarization disk 110, radially extending reinforcing ribs (not shown in the figure) are provided on the polarization disk 110.

[0050] Specifically, the number of the reinforcing ribs can be set to multiple, and the multiple reinforcing ribs are arranged along the circumferential direction of the polarization disk 110. At the same time, optionally, the circumferential position of the magnetic force generating unit 122 on the polarization disk 110 can be set to be located between two adjacent reinforcing ribs, that is, the magnetic force generating unit 122 is set at a position not directly opposite to the reinforcing rib.

[0051] Figure 4 The structural schematic diagram of the current control unit 121 in the rotor axial force loading device 100 provided in this embodiment is shown. Please refer to Figures 1-4 Furthermore, the magnetic force generating structure 120 includes multiple magnetic force generating unit groups, and the multiple magnetic force generating unit groups are distributed along the radial direction of the polarization disk 110. The current control unit 121 has multiple output interfaces, and multiple magnetic force generating units 122 in each magnetic force generating unit group are connected to the same output interface to independently control the current direction and magnitude of the multiple magnetic force generating unit groups through the current control unit 121.

[0052] Specifically, in this embodiment, the number of magnetic force generating unit groups is three, namely the first magnetic force generating unit group 126, the second magnetic force generating unit group 127, and the third magnetic force generating unit group 128. Correspondingly, the number of output interfaces on the current control unit 121 is set to three, and these three output interfaces are the first output interface 1211, the second output interface 1212, and the third output interface 1213 respectively. A plurality of magnetic force generating units 122 of the first magnetic force generating unit group 126 are all connected to the first output interface 1211, that is, the current control unit 121 uniformly controls the plurality of magnetic force generating units 122 in the first magnetic force generating unit group 126. Under the control of the current control unit 121, the current magnitudes and directions of the plurality of magnetic force generating units 122 in the first magnetic force generating unit group 126 are the same; a plurality of magnetic force generating units 122 of the second magnetic force generating unit group 127 are all connected to the second output interface 1212, that is, the current control unit 121 uniformly controls the plurality of magnetic force generating units 122 in the second magnetic force generating unit group 127. Under the control of the current control unit 121, the current magnitudes and directions of the plurality of magnetic force generating units 122 in the second magnetic force generating unit group 127 are the same; a plurality of magnetic force generating units 122 of the third magnetic force generating unit group 128 are all connected to the third output interface 1213, that is, the current control unit 121 uniformly controls the plurality of magnetic force generating units 122 in the third magnetic force generating unit group 128. Under the control of the current control unit 121, the current magnitudes and directions of the plurality of magnetic force generating units 122 in the third magnetic force generating unit group 128 are the same.

[0053] At the same radial position, the magnetic force generating unit groups are evenly distributed circumferentially, and the input current directions and magnitudes are the same, so that the axial force loading is more uniform and the influence on the dynamic characteristics of the rotor 211 is reduced.

[0054] Since the current control unit 121 independently controls the current directions and magnitudes of multiple magnetic force generating unit groups, the magnetic field magnitudes and directions generated by different magnetic force generating unit groups during the rotor 211 test can be set differently according to requirements. For example, the magnetic field directions of the magnetic force generating unit groups at different radial positions can be set differently, which helps to control the vibration of the polarization disk 110 during the test; at the same time, the magnetic field magnitudes of the magnetic force generating units 122 at different radial positions can also be set differently to avoid excessive deformation on the polarization disk 110 and thus affect the test results.

[0055] Further, a display unit is provided on the current control unit 121 corresponding to a plurality of output interfaces. That is, in this embodiment, a first display unit 1214 for displaying the direction and magnitude of the current output by the first output interface 1211, a second display unit 1215 for displaying the direction and magnitude of the current output by the second output interface 1212, and a third display unit 1216 for displaying the direction and magnitude of the current output by the third output interface 1213 are provided on the current control unit 121.

[0056] It should be noted that the number of output interfaces and the magnetic force generating unit group are not limited herein. It can be understood that in other embodiments, the number of output interfaces and the magnetic force generating unit group can also be set to two, four, etc. according to requirements.

[0057] Further, the distribution density of the magnetic force generating units 122 in the magnetic force generating unit group near the axis of the polarization disk 110 is greater than that in the magnetic force generating unit group far from the axis of the polarization disk 110. In other words, the magnetic force generating units 122 in the magnetic force generating structure 120 have a distribution trend of being denser at lower radii and sparser at higher radii.

[0058] Specifically, in this embodiment, the distribution density of the magnetic force generating units 122 in the first magnetic force generating unit group 126 is greater than that in the second magnetic force generating unit group 127; the distribution density of the magnetic force generating units 122 in the second magnetic force generating unit group 127 is greater than that in the third magnetic force generating unit group 128.

[0059] The rotor axial force loading device 100 and the rotor test device 10 provided by the embodiments of the present invention use the magnetic field generated by the current to achieve controllable loading of the axial force in terms of direction and magnitude. Compared with the existing settings using compressed air, when used in a vacuum environment, it does not damage the working environment of the vacuum chamber, reduces the working time of the vacuum pump, saves energy, and also avoids problems caused by air leakage. At the same time, through the setting of the device structure, it can be reused, and the function of the polarization disk 110 is relatively single, which is convenient for adjustment and replacement according to the needs of different rotors 211. Most of the functions are integrated on the magnetic force generating structure 120. Although the cost of the magnetic force generating structure 120 is relatively high, due to its good versatility and independence from the test piece structure, it can be reused, which helps to reduce the test cost.

[0060] The embodiments of the present invention also provide a rotor axial force loading method, which can be implemented by using the above-mentioned rotor axial force loading device 100. Specifically, the rotor axial force loading method includes:

[0061] S01: Fix the polarization disk 110 to the rotor 211 in a connected manner.

[0062] A preset magnetic field direction is set on the polarization disk 110. At the same time, the material of the polarization disk 110 can be selected according to the axial force required by the rotor 211 to be tested, and a material that can achieve the required magnetic field strength can be selected. Moreover, due to the structure of the rotor axial force loading device 100, the axial force can be increased by adding the magnetic force generating unit 122, thereby reducing the requirement for the magnetic field strength of the polarization disk 110, which helps to improve the versatility of the polarization disk 110 and reduce costs.

[0063] S02: Set the magnetic force generating structure 120 at a preset position on one side of the polarization disk 110.

[0064] Fix the position of the magnetic force generating unit 122 in the magnetic force generating structure 120 through the fixing bracket 214 or other fixing parts, so that the relative position between the magnetic force generating unit 122 and the polarization disk 110 is in the preset position. Specifically, the preset position includes the distance between the magnetic force generating unit 122 in the magnetic force generating structure 120 and the polarization disk 110, and the relative position of the magnetic force generating unit 122 in the magnetic force generating structure 120 and the polarization disk 110 in the radial direction.

[0065] S03: Control the magnetic force generating structure 120 to generate a magnetic field with a preset direction and magnitude.

[0066] Control the current control unit 121 in the magnetic force generating structure 120 to output a current with a preset direction and magnitude to each magnetic force generating unit group, so as to generate corresponding magnetic fields through multiple magnetic force generating unit groups. The resultant force generated by the interaction between the multiple magnetic fields and the polarization disk 110 is the axial force applied to the rotor 211, and the specific direction and magnitude of this axial force are determined according to the test requirements.

[0067] As described above, the above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A rotor axial force loading device for applying an axial force to a rotor, characterized in that, the rotor axial force loading device comprises: a polarization disk having a preset magnetic field direction and configured to be fixedly connected to the rotor; and a magnetic force generating structure disposed on one side of the polarization disk and configured to generate a magnetic field that is the same as or opposite to the preset magnetic field direction, so that a repulsive axial force or an attractive axial force is generated between the polarization disk and the magnetic force generating structure.

2. The rotor axial force loading device according to claim 1, characterized in that, the magnetic force generating structure comprises a magnetic force generating unit and a current control unit, the current control unit being electrically connected to the magnetic force generating unit to control the direction and magnitude of the current obtained by the magnetic force generating unit, and the magnetic force generating unit being configured to generate a magnetic field that is the same as or opposite to the preset magnetic field direction.

3. The rotor axial force loading device according to claim 2, characterized in that, the polarization disk is annular, and the number of the magnetic force generating units is multiple, and the multiple magnetic force generating units are uniformly distributed along the circumferential direction of the polarization disk to form a magnetic force generating unit group.

4. The rotor axial force loading device according to claim 3, characterized in that, the magnetic force generating structure comprises multiple magnetic force generating unit groups that are radially distributed along the polarization disk; the current control unit has multiple output interfaces, and the multiple magnetic force generating units in each magnetic force generating unit group are connected to the same output interface, so as to independently control the direction and magnitude of the current of the multiple magnetic force generating unit groups through the current control unit.

5. The rotor axial force loading device according to claim 4, characterized in that, the distribution density of the magnetic force generating units in the magnetic force generating unit group near the axis of the polarization disk is greater than the distribution density of the magnetic force generating units in the magnetic force generating unit group far from the axis of the polarization disk.

6. The rotor axial force loading device according to claim 2, characterized in that, the magnetic force generating unit comprises an AC-DC converter, a current stabilizer, and an electromagnetic head that are arranged in sequence, and the AC-DC converter, the current stabilizer, and the electromagnetic head are integrated into one body.

7. The rotor axial force loading device according to claim 1, characterized in that, the polarization disk is provided with reinforcing ribs extending radially.

8. A rotor test device, characterized in that, the rotor test device comprises a rotor, a first bearing, a second bearing, a fixed bracket, and the rotor axial force loading device according to any one of claims 1-7; the axial ends of the rotor are respectively rotatably supported on the fixed bracket by the first bearing and the second bearing; the polarization disk of the rotor axial force loading device is fixedly connected to the rotor.

9. The rotor test device according to claim 8, characterized in that, the polarization disk is detachably connected to the rotor.

10. A rotor axial force loading method, characterized in that, the rotor axial force loading method comprises: Fix the polarization disk to the rotor; wherein, the polarization disk has a preset magnetic field direction; Arrange the magnetic force generating structure at a preset position on one side of the polarization disk; the preset position includes the distance between the magnetic force generating structure and the polarization disk and the relative position of the magnetic force generating structure and the polarization disk in the radial direction; Control the magnetic force generating structure to generate a magnetic field with a preset direction and magnitude, so as to generate an axial force with a preset direction and magnitude on the rotor through the interaction between the magnetic force generating structure and the polarization disk.

Images