CN116337430A - Electromagnetic loading device for simulating stress condition of propeller - Google Patents

Abstract

The invention relates to the technical field of reliability test of motor shafting, and discloses an electromagnetic loading device for simulating the stress condition of a propeller, which comprises a propeller driving device fixed on a support plate, wherein an output shaft of the propeller driving device is fixedly connected with a magnetic disc through a switching shaft, and a radial electromagnetic loading mechanism and an axial electromagnetic loading mechanism are sequentially arranged on the inner side of the support plate along the direction away from the support plate; the torque electromagnetic loading mechanism is arranged in the radial loading mechanism and comprises a stator and a rotor, and the stators are connected in series for loading; the controllable power supply module is respectively and electrically connected with the radial electromagnetic loading mechanism and the axial electromagnetic loading mechanism, and the static stator and the rotor rotating along with the magnetic disc jointly form a permanent magnet motor device. The invention can accurately simulate the axial force, overturning force, radial force, vibration, impact and other alternating loads transmitted to the bearing by the propeller and the torque generated on the output shaft of the propeller driving device when the propeller rotates, and has the advantages of small occupied space, simple structure and low manufacturing cost.

Description

An electromagnetic loading device for simulating the stress on the propeller

technical field

The invention belongs to the technical field of reliability testing of electric motor shafting, and in particular relates to an electromagnetic loading device for simulating the stress situation of a propeller.

Background technique

The main function of existing aviation and ship propeller motors is to drive the axial force generated after the propeller rotates as a power source. As shown in Figure 1, the stress situation when the propeller rotates includes the following points, 1) the tangential force received by overcoming the fluid resistance during rotation, that is, converted into the torque on the output shaft of the propeller drive device; 2) acting on the propeller after rotation 3) The overturning force caused by the uneven distribution of the axial velocity of the fluid in the radial direction; 4) The radial force generated by the propeller's own gravity; 5) The propeller dynamic unbalance and fluid turbulence Radial force generated; 6) Alternating loads such as alternating force, vibration and impact generated by the momentary change of fluid flow state.

Various forces acting on the propeller are transferred to the propeller drive device through the propeller, output shaft, bearing, housing and fixed bracket, and the reliability of the bearing is the key factor affecting the reliability of the propeller drive device. In order to verify the reliability of the propeller drive and bearings, it is necessary to take into account the influence of the propeller’s actual stress on the bearings during the test run, so as to verify whether the design of the propeller drive and the selection of bearings are reasonable.

Considering the complexity of fluid flow, the propeller is simultaneously subjected to forces of various directions and sizes when it rotates. The traditional way to simulate propeller loads is to simulate an axial force and apply it to the output shaft of the propeller drive. At present, the loading methods of axial force include mechanical loading method and electromagnetic loading method. The structure of the mechanical loading device for axial force is relatively complicated, the device takes up a large space, and the control method is not flexible. The axial force electromagnetic loading device uses the electromagnetic principle to greatly simplify the structure of the device and reduce the occupied space; the magnetic force generated by the electromagnet is a field force, and the object under force does not need to be in contact with the electromagnet, and the magnetic field strength is proportional to the current. Proportional, easy to control the size of the magnetic force. The electromagnetic force can be used to simulate the load exerted by the propeller on the shaft system, which can truly simulate the force and motion state of the shaft system.

CN 110146299 A discloses "an electromagnetic axial force loading device", which includes a connecting shaft, a spline is provided at the left end of the connecting shaft, a boss is provided at the right part of the middle part, and a flange is provided at the right end; an iron The central hole of the disc is matched with the middle part of the connecting shaft, and an insulating washer is provided at the part where the two cooperate; the right side of the iron disc is in corresponding contact with the left side of the boss, and a An insulating washer; a nut is threadedly connected with the middle part of the connecting shaft, the right side of the nut is in corresponding contact with the left side of the iron plate, and an insulating washer is provided at the corresponding contact position of the two; multiple electromagnet brackets are equidistantly arranged On a circumference of the iron plate, each electromagnet support is provided with an electromagnet component, and is perpendicular to the left side of the iron plate. This loading device can accurately adjust the axial loading force to ensure that the shaft end of the dynamometer is not subject to axial force, but it does not consider the radial loading force on the propeller and the torque effect of the propeller on the output shaft of the propeller drive device. The electromagnet bracket is in It is easy to deform under the action of high suction, and the torque of the test comes from an external dynamometer. The entire test system is too large to complete the simulation test in the environmental test chamber.

Contents of the invention

The object of the present invention is to provide an electromagnetic loading device for simulating the stress on the propeller, which can accurately simulate the axial force, overturning force, radial force, vibration, impact and other alternating loads transmitted to the bearing by the propeller and the propeller The torque generated on the output shaft of the propeller driving device when rotating has the advantages of small space occupation, simple structure and low manufacturing cost.

The above-mentioned purpose of invention is achieved through the following technical solutions:

An electromagnetic loading device for simulating the stress on the propeller, including a support plate, an adapter shaft, a magnetic disc, a propeller driving device, a radial electromagnetic loading mechanism, an axial electromagnetic loading mechanism, a torque electromagnetic loading mechanism and a controllable power supply module;

The propeller driving device is fixedly connected to the outside of the support plate, the output shaft of the propeller driving device is fixedly connected to the magnetic disk through the adapter shaft, and the output shaft, the adapter shaft and the magnetic disk of the propeller driving device are coaxial, The inner side of the support plate is sequentially provided with a radial electromagnetic loading mechanism and an axial electromagnetic loading mechanism along the direction away from the support plate;

The radial electromagnetic loading mechanism includes a ring-shaped mounting frame and a radial electromagnet, the magnetic disk is nested inside the mounting frame, the mounting frame is coaxial with the magnetic disk, and the radial electromagnet is installed along the The circumferential distribution of the frame, the end of the mounting frame is connected with the support plate;

The axial electromagnetic loading mechanism includes a cover plate and an axial electromagnet, the cover plate is located at the other end of the mounting bracket and opposite to the magnetic disc, and the axial electromagnet is arranged on the side of the cover plate facing the magnetic disc , the cover plate is connected to the mounting frame;

The torque electromagnetic loading mechanism includes a stator and a rotor. The stator includes a stator core, a stator winding and a load. The stator core is fixed on the inner circumference of the mounting bracket, and the stator winding is wound on the stator core. The winding is connected in series with the load; the rotor includes a rotor iron core and a rotor magnetic steel, the rotor iron core is fixedly installed on the outer circumference of the magnetic disk and is opposite to the stator iron core, and the rotor magnetic steel is fixed on the rotor iron core ; The magnetic field generated by the current in the stator winding interacts with the magnetic field of the rotor magnet to generate a torque that hinders the rotation of the magnetic disc;

The controllable power supply module includes a controller, a DC power supply and a signal generator, the controller is electrically connected to the DC power supply and the signal generator respectively, and the controller is also electrically connected to the coil winding of the radial electromagnet and the axial electromagnetic Iron coil windings.

The above-mentioned electromagnetic loading device for simulating the force on the propeller, wherein the axial electromagnets are 2 to 5 pieces, and the axial electromagnets include a central electromagnet arranged along the axial direction of the magnetic disk and a central electromagnet distributed in the central electromagnet. Iron circumferential side electromagnet.

The above-mentioned electromagnetic loading device for simulating the force of the propeller, wherein the radial electromagnet is 1 to 2 pieces, the radial electromagnet is arranged inside the mounting frame, and the radial electromagnet is vertically arranged along the mounting frame. set in the diameter direction.

The above-mentioned electromagnetic loading device for simulating the stress on the propeller, wherein the cross-section of the magnetic disc is U-shaped, the magnetic disc includes a disc body and a support ring protruding from the outer periphery of the disc body, and the support ring is perpendicular to the circle The disk body, the center of the disk body is fixedly connected with one end of the adapter shaft.

The above-mentioned electromagnetic loading device for simulating the stressed situation of the propeller, wherein, the end faces of the plurality of axial electromagnets on the side of the magnetic disc are flush and parallel to the disc body, and the end faces of the axial electromagnets are parallel to the disc body. A gap of 1 to 2 mm is provided between them.

The above electromagnetic loading device for simulating the stress on the propeller, wherein the radial electromagnet is located on the elevation of the disc body, and the side of the radial electromagnet close to the disc body forms an arc concentric with the disc body On the surface, a gap of 1-2 mm is provided between the arc surface of the radial electromagnet and the outer circle of the disk body.

In the above electromagnetic loading device for simulating the stress on the propeller, a positioning notch is provided at the center of the disc body near the adapter shaft, and the adapter shaft is provided with an installation notch that matches the positioning notch.

The above-mentioned electromagnetic loading device for simulating the stress on the propeller, wherein the rotor core is ring-shaped and sleeved on the outer circumference of the support ring, a plurality of the rotor magnetic steels are evenly distributed on the outer circumference of the rotor core, and the stator core The rotor magnetic steel is located on the same elevation as the axis of the vertical transfer shaft, and the inner side of the stator core and the outer side of the rotor magnetic steel are provided with an arc surface concentric with the transfer shaft. A gap of 0.5-1 mm is provided between the arc surfaces of the rotor magnetic steel.

In the above electromagnetic loading device for simulating the stress on the propeller, the support plate, the mounting frame and the cover plate are all made of non-magnetic conductive materials.

In the above electromagnetic loading device for simulating the stress on the propeller, the support plate, the mounting frame and the cover plate are all provided with through holes.

Compared with the prior art, the present invention has the following beneficial effects:

The invention adopts a radial electromagnetic loading mechanism, an axial electromagnetic loading mechanism and a controllable power supply module, which can realize synchronous simulation of alternating loads such as alternating force, vibration and impact when the propeller is working, and verify the design of the propeller driving device and the selection of bearings. Whether the model is reasonable and reliable; the external load of the torque loading mechanism can be used to simulate the propeller load torque on the output shaft of the propeller drive device, and the torque on the propeller can be simulated without an external dynamometer.

The invention can simultaneously simulate the axial force, overturning force and radial force received by the propeller by selecting the installation quantity and positions of the axial electromagnet and the radial electromagnet.

The invention adopts a closed integrated structure, has small volume, compact structure, strong system rigidity, small deformation, precise and flexible electromagnetic force control, and can be placed in an environmental test chamber for simulation tests.

Description of drawings

Figure 1 is a schematic diagram of propeller force analysis;

Fig. 2 is a structural representation of the present invention;

Fig. 3 is a structural schematic diagram of another perspective of the present invention;

Fig. 4 is an explosion diagram of the present invention;

Fig. 5 is a schematic cross-sectional structure diagram of the present invention;

Fig. 6 is a block diagram of the working principle of the present invention as a radial electromagnet, a central electromagnet and a side electromagnet.

Reference signs: 1. support plate; 2. adapter shaft; 3. magnetic disc; 31. disc body; 32. support ring; 33. positioning notch; 4. propeller driving device; 5. radial electromagnetic loading Mechanism; 51, mounting frame; 52, radial electromagnet; 6, axial electromagnetic loading mechanism; 61, cover plate; 62, axial electromagnet; 621, central electromagnet; 622, side electromagnet; 7, torque electromagnetic Loading mechanism; 71, stator; 711, stator core; 712, stator winding; 72, rotor; 721, rotor core; 722, rotor magnetic steel; 73, load; 8, controllable power module; 81, controller; 811. First controller; 812. Second controller; 813. Third controller; 82. DC power supply; 83. Signal generator; 831. First signal generator; 832. Second signal generator; 833. The third signal generator; 9. Through holes.

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawings 2-6.

As shown in Figure 2-4, an electromagnetic loading device for simulating the propeller force, including a support plate 1, an adapter shaft 2, a magnetic disc 3, a propeller driving device 4, a radial electromagnetic loading mechanism 5, an axial electromagnetic Loading mechanism 6, torque electromagnetic loading mechanism 7 and controllable power supply module 8.

As shown in Figures 4 and 5, the support plate 1 is circular, the propeller drive device 4 is fixedly connected to the outside of the support plate 1 by screws, and the output shaft of the propeller drive device 4 is fixedly connected to the magnetic disk 3 through the adapter shaft 2, specifically One end of the output shaft of the propeller driving device 4 is fixedly connected to the adapter shaft 2 , and the other end of the adapter shaft 2 is fixedly connected to the magnetic disc 3 . The output shaft of the propeller driving device 4, the adapter shaft 2 and the magnetic disc 3 are coaxially arranged, and the propeller driving device 4 is used to drive the magnetic disc 3 to rotate. Specifically, the propeller driving device 4 adopts a motor or an engine, and the The rotation of the output shaft can drive the magnetic disk 3 to rotate synchronously; the inner side of the support plate 1 is sequentially provided with a radial electromagnetic loading mechanism 5 and an axial electromagnetic loading mechanism 6 along the direction away from the support plate 1; the axial electromagnetic loading mechanism 6 and the radial electromagnetic loading mechanism The loading mechanism 5 acts on the axial direction and the radial direction of the magnetic disk 3 respectively, and the magnetic disk 3 is used to simulate the propeller, which can simulate the axial and radial force of the propeller.

The radial electromagnetic loading mechanism 5 includes an annular mounting frame 51 and a radial electromagnet 52, the magnetic disk 3 is nested inside the mounting frame 51, the mounting frame 51 is coaxial with the magnetic disk 3, and the radial electromagnet 52 is installed along the Circumferential distribution of the frame 51, one end of the mounting frame 51 is connected to the support plate 1, specifically, the mounting frame 51 and the support plate 1 are detachably connected by screws.

The axial electromagnetic loading mechanism 6 includes a cover plate 61 and an axial electromagnet 62. The cover plate 61 is circular. The cover plate 61 is located at the other end of the mounting frame 51 and is opposite to the magnetic disc 3. The cover plate 61 and the magnetic disc 3 are mutually Parallel, the axial electromagnet 62 is arranged on the side of the cover plate 61 facing the magnetic disc 3 , and the cover plate 61 is connected to the mounting frame 51 , specifically, the cover plate 61 and the mounting frame 51 are detachably connected by screws.

The support plate 1, the radial electromagnetic loading mechanism 5, and the axial electromagnetic loading mechanism 6 form a closed integrated structure, which improves the rigidity of the electromagnetic loading device.

The section of the magnetic disc 3 of this embodiment is U-shaped, and the magnetic disc 3 includes a disc body 31 and a support ring 32 protruding from the periphery of the disc body 31. The support ring 32 is vertical to the disc body 31, and the center of the disc body 31 is It is fixedly connected with one end of the adapter shaft 2.

The torque electromagnetic loading mechanism 7 includes a stator 71 and a rotor 72. The stator 71 includes a stator iron core 711, a stator winding 712 and a load 73. The stator iron core 711 is fixed on the mounting frame 51 inboard circumferential direction, and the stator iron core 711 is wound with a stator winding 712. Specifically, the inner side wall of the stator core 711 is provided with a number of notches at intervals along the circumferential direction, the stator winding 712 is wound on the stator core 711 through the notches, and the stator winding 712 is connected in series with the load 73; the rotor 72 includes a rotor core 721 and a rotor The magnetic steel 722 and the rotor iron core 721 are fixedly installed on the outer circumferential direction of the magnetic disk 3 and are arranged opposite to the stator iron core 711. The stator iron core 711 and the rotor magnetic steel 722 are located on the same elevation perpendicular to the axis of the transfer shaft 2, and the rotor The magnetic steel 722 is fixed on the rotor iron core 721; specifically, the outer wall of the rotor iron core 721 is provided with a number of notches at intervals along the circumferential direction, and the rotor magnetic steel 722 is fixed in the notches; the magnetic field generated by the current in the stator winding 712 and the rotor The magnetic fields of the magnetic steel 722 interact to generate a torque that hinders the rotation of the magnetic disk 3 .

It should be noted that there is a gap between the radial electromagnet 52 and the rotor core 721 along the axial direction of the magnetic disc 3 to avoid mutual interference between the radial electromagnetic loading mechanism 5 and the torque electromagnetic loading mechanism 7 .

As shown in Figure 6, the controllable power supply module 8 includes a controller 81, a DC power supply 82 and a signal generator 83, the controller 81 is electrically connected to the DC power supply 82 and the signal generator 83 respectively, and the controller 81 is also electrically connected to the radial electromagnetic The coil winding of the iron 52 and the coil winding of the axial electromagnet 62, the stator 71 installed on the mounting frame 51 and the rotor 72 installed on the magnetic disc 3 form a permanent magnet motor device.

The axial electromagnet 62 and the radial electromagnet 52 are powered by the controllable power supply module 8, combined with different control strategies, the axial electromagnet 62 and the radial electromagnet 52 can be controlled by the controller 81 to generate alternating frequency and amplitude suction force , to simulate the alternating loads such as axial force, radial force, vibration and impact during the rotation of the propeller. The magnetic disc 3 is equivalent to the propeller, and is used to simulate the stressed situation of the propeller. The magnetic disc 3 is used as the action object of the axial electromagnet 62 and the radial electromagnet 52, through the axial electromagnet 62 and the radial electromagnet 52 The installation quantity, installation location and control strategy are used to control the electromagnetic attraction acting on the magnetic disk 3, thereby simulating the axial and radial stress conditions of the propeller.

When the propeller driving device 4 drives the magnetic disk 3 to rotate and synchronously drives the rotor 72 to rotate, the circuit formed by the stator winding 712 and the load 73 will generate a current, and the magnetic field generated by the current flowing through the stator winding 712 and the magnetic field of the rotor magnet 722 The interaction produces a torque that hinders the rotation of the rotor 72, that is, the torque that hinders the rotation of the magnetic disk 3. The magnitude of the torque can be adjusted by adjusting the load 73, thereby simulating the torque acting on the output shaft of the propeller drive device 4 when the propeller rotates.

There are 2 to 5 axial electromagnets 62 , and the axial electromagnets 62 include a central electromagnet 621 arranged along the axial direction of the magnetic disk 3 and side electromagnets 622 distributed in the circumferential direction of the central electromagnet 621 . When there are more than two side electromagnets 622 , the distances between the side electromagnets 622 and the center electromagnet 621 can be the same or different.

The central electromagnet 621 can generate an axial force on the magnetic disc 3, simulating the axial force on the propeller; the side electromagnet 622 can generate an overturning force on the magnetic disc 3, simulating the overturning force on the propeller; the radial electromagnet 52 is located directly above or directly below the magnetic disk 3, and the resultant force of the suction generated by it and the self-weight of the magnetic disk 3 is used to simulate the radial force suffered by the propeller.

The end surfaces of the plurality of axial electromagnets 62 on the side of the magnetic disk 3 are flush with and parallel to the magnetic disk 3 , and a gap of 1-2 mm is provided between the end surfaces of the axial electromagnets 62 and the disk body 31 .

Radial electromagnet 52 is positioned at disc body 31 place facades, and radial electromagnet 52 is the concentric arc surface with disc body 31 near disc body 31 sides, and the arc surface of radial electromagnet 52 is in line with the circle. A gap of 1-2 mm is provided between the outer circles of the disc body 31 .

There are 1 to 2 radial electromagnets 52 , and the radial electromagnets 52 are arranged inside the mounting frame 51 , and the radial electromagnets 52 are arranged along the vertical diameter direction of the mounting frame 51 . When the radial electromagnet 52 is one piece, the radial electromagnet 52 can be arranged on the top or bottom of the vertical diameter direction of the mounting frame 51; when the radial electromagnet 52 is two pieces, the radial electromagnet 52 It can be arranged on the top and bottom of the vertical diameter direction of the installation frame 51 . When there are two radial electromagnets 52 , the two radial magnets 52 are at the same distance from the center of the installation frame 51 .

FIG. 6 shows a block diagram of the working principle of the electromagnetic loading device when there is one radial electromagnet 52 , one central electromagnet 621 in the axial electromagnet 62 , and one side electromagnet 622 . The signal generator 83 includes a first signal generator 831 , a second signal generator 832 and a third signal generator 833 , and the controller 81 includes a first controller 811 , a second controller 812 and a third controller 813 .

The first signal generator 831, the first controller 811 and the center electromagnet 621 are electrically connected in sequence, and the electric signal generated by the first signal generator 831 is controlled and adjusted by the first controller 811 and sent to the coil winding of the center electromagnet 621, The magnetic field generated by the central electromagnet 621 acts on the disk body 31 in the axial direction, simulating the axial force on the propeller.

The second signal generator 832, the second controller 812 and the side electromagnet 622 are electrically connected in sequence, and the electric signal generated by the second signal generator 832 is controlled and adjusted by the second controller 812 and sent to the coil winding of the side electromagnet 622, The magnetic field generated by the side electromagnet 622 acts on the disc body 31 in the axial direction, simulating the overturning force on the propeller.

The third signal generator 833, the third controller 813 and the radial electromagnet 52 are electrically connected in sequence; the electric signal generated by the third signal generator 833 is controlled and adjusted by the third controller 813 and sent to the coil of the radial electromagnet 52 Winding, the magnetic field generated by the radial electromagnet 52 acts on the disk body 31 along the radial direction of the disk body 31, simulating the radial force on the propeller.

In this embodiment, the support plate 1 , the mounting frame 51 and the cover plate 61 are all made of non-magnetic materials. Such as can be used, copper or aluminum alloy. The support plate 1 , the mounting frame 51 and the cover plate 61 are all made of non-magnetic materials, which can avoid the magnetic interference of the above components on the axial electromagnetic loading mechanism 6 , radial electromagnetic loading mechanism 5 and torque electromagnetic loading mechanism 7 .

As shown in Figure 4, in this embodiment, the output shaft of the propeller drive device 4 is connected to the adapter shaft 2 through a keyway structure. Specifically, a keyway can be provided in the inner cavity of the adapter shaft 2 along its axial direction, and the propeller drive device The output shaft of 4 is provided with a key adapted to the keyway to ensure that the output shaft of the propeller drive 4 can rotate synchronously with the adapter shaft 2; the adapter shaft 2 and the output shaft of the propeller drive 4 are axially connected by screws Fixed connection. The center of the disc body 31 is provided with a positioning notch 33 on the side close to the transfer shaft 2, and the transfer shaft 2 is provided with an installation notch that matches the positioning notch 33, and the disc body 31 and the transfer shaft 2 can be fixed with screws connect. Through the cooperation of the installation notch and the positioning notch 33, the coaxiality between the adapter shaft 2 and the magnetic disc 3 as well as the accuracy and convenience of installation can be ensured.

The rotor iron core 721 is ring-shaped and is sleeved on the outer periphery of the support ring 32. The rotor iron core 721 can rotate synchronously with the support ring 32. A plurality of rotor magnets 722 are evenly distributed on the outer periphery of the rotor iron core 721. The stator iron core 711 is connected with the rotor magnet. The steel 722 is located on the same elevation of the axis of the vertical adapter shaft 2, the inner side of the stator core 711 and the outer side of the rotor magnetic steel 722 are provided with an arc surface concentric with the adapter shaft 2, the arc surface of the stator iron core 711 and the rotor A gap of 0.5-1 mm is provided between the arc surfaces of the magnetic steel 722 .

In one embodiment, the support plate 1 , the mounting frame 51 and the cover plate 61 are all provided with through holes 9 .

The through holes 9 on the cover plate 61 are evenly distributed along the circumferential direction of the cover plate 61, the through holes 9 on the mounting frame 51 are evenly distributed along the circumferential direction of the mounting frame 51, and the through holes 9 of the support plate 1 are along the circumferential direction of the support plate 1. Evenly distributed.

The through hole 9 can be a waist-shaped hole, a circular hole or an oval hole, and the through hole 9 can be used to reduce the weight of the electromagnetic charging device, and at the same time, it is convenient to observe the coordination and operation inside the electromagnetic charging device.

The embodiments of this specific implementation mode are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention, so: all equivalent changes made according to the structure, shape and principle of the present invention should be covered by within the protection scope of the present invention.

Claims (10)

1. The electromagnetic loading device for simulating the stress condition of the propeller is characterized by comprising a support plate, a switching shaft, a magnetic disc, a propeller driving device, a radial electromagnetic loading mechanism, an axial electromagnetic loading mechanism, a torque electromagnetic loading mechanism and a controllable power module;

the propeller driving device is fixedly connected to the outer side of the support plate, an output shaft of the propeller driving device is fixedly connected with the magnetic disc through a switching shaft, the output shaft of the propeller driving device, the switching shaft and the magnetic disc are coaxial, and a radial electromagnetic loading mechanism and an axial electromagnetic loading mechanism are sequentially arranged on the inner side of the support plate along the direction away from the support plate;

the radial electromagnetic loading mechanism comprises an annular mounting frame and radial electromagnets, the magnetic discs are nested inside the mounting frame, the mounting frame is coaxial with the magnetic discs, the radial electromagnets are distributed along the circumferential direction of the mounting frame, and the end parts of the mounting frame are connected with the support plates;

the axial electromagnetic loading mechanism comprises a cover plate and an axial electromagnet, the cover plate is positioned at the other end of the mounting frame and opposite to the magnetic disc, the axial electromagnet is arranged on one side surface of the cover plate facing the magnetic disc, and the cover plate is connected with the mounting frame;

the torque electromagnetic loading mechanism comprises a stator and a rotor, wherein the stator comprises a stator core, a stator winding and a load, the stator core is fixed on the inner side circumference of the mounting frame, the stator winding is wound on the stator core, and the stator winding is connected with the load in series; the rotor comprises a rotor core and rotor magnetic steel, the rotor core is fixedly arranged on the circumference of the outer side of the magnetic disc and is opposite to the stator core, and the rotor magnetic steel is fixed on the rotor core; the magnetic field generated by the current in the stator winding interacts with the magnetic field of the rotor magnetic steel to generate torque for preventing the magnetic disc from rotating;

the controllable power supply module comprises a controller, a direct current power supply and a signal generator, wherein the controller is respectively and electrically connected with the direct current power supply and the signal generator, and the controller is also respectively and electrically connected with a coil winding of the radial electromagnet and a coil winding of the axial electromagnet.

2. The electromagnetic loading device for simulating the stress situation of a propeller according to claim 1, wherein the axial electromagnets are 2-5, and the axial electromagnets comprise a center electromagnet arranged along the axial direction of the magnetic disc and side electromagnets distributed in the circumferential direction of the center electromagnet.

3. The electromagnetic loading device for simulating the stress situation of a propeller according to claim 1, wherein the number of radial electromagnets is 1-2, the radial electromagnets are arranged on the inner side of the mounting frame, and the radial electromagnets are arranged along the vertical diameter direction of the mounting frame.

4. The electromagnetic loading device for simulating the stress situation of a propeller according to claim 1, wherein the cross section of the magnetic disc is U-shaped, the magnetic disc comprises a disc body and a supporting ring extending out of the periphery of the disc body, the supporting ring is perpendicular to the disc body, and the center of the disc body is fixedly connected with one end of the adapter shaft.

5. The electromagnetic loading device for simulating the stress situation of a propeller according to claim 4, wherein the end faces of the axial electromagnets close to one side of the magnetic disc are flush and parallel to the disc body, and a gap of 1-2 mm is arranged between the end faces of the axial electromagnets and the disc body.

6. The electromagnetic loading device for simulating the stress situation of a propeller according to claim 4, wherein the radial electromagnet is located on the vertical surface where the disc body is located, one side of the radial electromagnet, which is close to the disc body, is an arc surface concentric with the disc body, and a gap of 1-2 mm is arranged between the arc surface of the radial electromagnet and the outer circle of the disc body.

7. The electromagnetic loading device for simulating the stress situation of a propeller according to claim 4, wherein a positioning spigot is arranged at one side of the center of the disc body, which is close to the adapter shaft, and the adapter shaft is provided with a mounting spigot which is matched with the positioning spigot.

8. The electromagnetic loading device for simulating the stress situation of a propeller according to claim 4, wherein the rotor core is annular and sleeved on the periphery of the supporting ring, the plurality of rotor magnetic steels are uniformly distributed on the periphery of the rotor core, the stator core and the rotor magnetic steels are located on the same vertical face perpendicular to the axis of the switching shaft, the inner side of the stator core and the outer side of the rotor magnetic steels are provided with arc surfaces concentric with the switching shaft, and a gap of 0.5-1 mm is arranged between the arc surfaces of the stator core and the arc surfaces of the rotor magnetic steels.

9. The electromagnetic loading device for simulating the stress situation of a propeller of claim 1, wherein the support plate, the mounting frame and the cover plate are all made of non-magnetic conductive materials.

10. The electromagnetic loading device for simulating the stress situation of a propeller according to claim 1, wherein through holes are formed in the support plate, the mounting frame and the cover plate.

Images