An automatic device for assembling rotors and bearings of auxiliary power units

Abstract

This invention relates to the field of APU rotor and bearing assembly technology, specifically disclosing an automatic device for assembling auxiliary power unit rotors and bearings. The device includes a support frame, a power unit mounted at the top of the support frame, and a connecting block connected to the output end of the power unit via a coupling after passing through a support wheel. A torque sensor is mounted on the outer wall of the connecting block, and a first lead screw is mounted on the bottom of the connecting block via a circular plate. An assembly mechanism is provided on the outer wall of the first lead screw. A base plate is mounted at the bottom of the support frame, and a movable plate is mounted on the top of the base plate. A circular rod is mounted at the center of the top of the movable plate, and a base is mounted on the top edge of the movable plate. A protective mechanism is provided at the top edge of the base. In this invention, the first lead screw drives the assembly mechanism to move downwards, pressing and assembling components such as rotors and bearings, replacing manual hammering and ordinary hydraulic blind assembly, eliminating human error, and ensuring uniform assembly of rotors and bearings in the same batch, meeting the requirements of precision assembly processes.

Description

Technical Field

[0001] This invention relates to the field of APU rotor and bearing assembly technology, and specifically to an automatic device for assembling auxiliary power unit rotors and bearings. Background Technology

[0002] The assembly of the Auxiliary Power Unit (APU) rotor and bearings is a core precision assembly process. The conventional assembly process is as follows: First, the sealing ring assembly, APU bearing, and bearing housing are assembled onto the machine base in sequence; then, the rotor and grating teeth are installed on the short shaft to form the rotor assembly; finally, the rotor assembly is assembled onto the machine base and APU bearing from top to bottom. The short shaft of the rotor assembly and the inner ring of the APU bearing use an interference fit or transition fit structure, requiring a large axial force to be applied during assembly to ensure the rotor assembly is properly positioned.

[0003] Currently, there is no dedicated automated assembly equipment in the industry, and blind assembly is generally carried out by manual hammering and ordinary hydraulic presses. This traditional assembly method has obvious technical defects: the axial force and rotor axial displacement cannot be detected and controlled in real time during the assembly process, which can easily lead to improper assembly of APU bearings; at the same time, the bearings are prone to being subjected to residual axial forces far exceeding their working limits after assembly, which seriously affects the operational stability of the APU and shortens the service life of the bearings and the whole machine. In addition, manual and conventional hydraulic assembly methods rely on the operator's experience, resulting in poor assembly consistency, large human error, and low assembly efficiency, making it difficult to meet the production requirements of standardized and precise mass assembly of APU rotors and bearings. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by proposing an automatic device for assembling the rotor and bearings of an auxiliary power unit.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An automatic device for assembling an auxiliary power unit rotor and bearing includes a support frame. A power device is mounted on the top of the support frame. The output end of the power device passes through the support frame and is connected to a cylindrical connecting block via a coupling. A torque sensor is mounted on the outer wall of the connecting block. A first lead screw is mounted on the bottom of the connecting block via a circular plate. An assembly mechanism for assembling the rotor and bearing is provided on the outer wall of the first lead screw. A base plate is mounted on the bottom of the support frame. A movable plate is provided on the top of the base plate. A circular rod is rotatably mounted at the center of the top of the movable plate. A base for placing the rotor and bearing components is provided on the top of the movable plate. A protective mechanism for shielding and protecting the components during assembly is provided at the top edge of the base.

[0006] Optionally, the assembly mechanism includes a movable seat mounted on the surface of the first lead screw, a plurality of guide rods mounted on the inner top surface of the support frame, the movable seat being connected to the plurality of guide rod slides, and a first fixed ring being connected to the bottom end of the movable seat through a first buffer mechanism, with a soft pad mounted on the bottom end of the first fixed ring.

[0007] Optionally, the first buffer mechanism includes a plurality of first damping rods installed at the bottom of the movable seat, the bottom ends of the plurality of first damping rods being connected to the first fixed ring, the outer walls of the plurality of first damping rods being fitted with first buffer springs, the bottom of the movable seat also being fitted with two first electric telescopic rods, and a first elastic cover for shielding and protecting the first buffer mechanism is provided between the movable seat and the first fixed ring.

[0008] Optionally, an installation plate is installed on one inner wall of the support frame, and a depth measuring instrument is installed on the outer wall of the installation plate. The detection probe of the depth measuring instrument abuts against the top of the movable seat. An air jet head is installed at the bottom of the soft pad. A connecting pipe for connecting to an externally preset air jet device is provided on the outer wall of the movable seat. The connecting pipe and the air jet head are connected by a flexible hose.

[0009] Optionally, the top of the base plate is provided with a sliding groove, a slider is installed inside the sliding groove, a rectangular block is installed at the top of the slider, and the rectangular block is connected and fixed to the movable plate.

[0010] Optionally, a first motor is installed at the bottom of one end of the movable plate, a second lead screw is installed at the output end of the first motor, a vertical rod is installed at the top of the other end of the movable plate, and the two ends of the base are respectively connected and cooperated with the second lead screw and the vertical rod.

[0011] Optionally, a second motor is installed inside the rectangular block, the output end of the second motor is connected to the bottom end of the round rod, and the top end of the base is connected to a second fixing ring through a second buffer mechanism.

[0012] Optionally, the outer wall of the round rod has two grooves, and two electric push rods are installed inside each of the two grooves. The telescopic ends of the two electric push rods are jointly fitted with an abutment plate.

[0013] Optionally, the second buffer mechanism includes multiple second damping rods installed on the top of the base, the top ends of the multiple second damping rods being connected to the second fixing ring, the outer walls of the multiple second damping rods being fitted with second buffer springs, two second electric telescopic rods being installed on the top of the base, and a second elastic cover for shielding and protecting the second buffer mechanism being provided between the base and the second fixing ring.

[0014] Optionally, the protective mechanism includes a circular groove on the top of the base, a shield installed inside the groove, a ring installed at the top of the shield, and multiple third electric telescopic rods installed at the edge of the base, with the telescopic ends of the multiple third electric telescopic rods connected to the ring.

[0015] The beneficial effects of this invention are: 1. In this invention, the first lead screw drives the assembly mechanism to move downward, pressing and assembling components such as rotors and bearings, replacing manual hammering and ordinary hydraulic blind assembly, eliminating human operation errors, and ensuring that the assembly state of rotors and bearings in the same batch is uniform, meeting the requirements of precision assembly process; at the same time, the torque sensor and depth measuring instrument can collect the assembly torque, axial force and rotor axial displacement in real time, accurately determine whether the rotor and bearing are assembled in place, and realize the quantification and monitoring of the assembly process.

[0016] 2. In this invention, after the movable seat moves the soft pad below into the rotor assembly, the external preset jet device can be activated, so that the jet head can spray high-pressure air downwards into the rotor assembly and other components to blow away and clean any impurities that may remain inside the rotor assembly and other components, thus avoiding the problem of impurities being assembled into the rotor assembly and affecting the normal use of the rotor assembly.

[0017] 3. In this invention, since a protective mechanism is provided at the top edge of the base, after the slider moves the base and other components into the support frame, the telescopic ends of multiple third electric telescopic rods can be controlled to extend upward together, pushing the ring to move upward and pulling the shield to extend and unfold upward, thus shielding and protecting the components placed on the top of the base, improving the safety of the rotor assembly and other components during assembly.

[0018] 4. In this invention, after the rotor is inspected, if the rotor's quality meets the standards, the slider can be controlled to move outward inside the groove, causing the base and the rotor assembled on top to move outward from inside the support frame. The shield is kept extended and unfolded. After manual rust prevention or lubrication treatment of the rotor surface, the packaging bag is placed on the shield surface. The top of the packaging bag is then limited manually or by a pre-set clamping device. Subsequently, the extension ends of multiple third electric telescopic rods are controlled to retract downward, causing the ring and shield to retract. At this point, the packaging bag can be smoothly placed on the assembled rotor surface, improving the efficiency of packaging the rotor surface and avoiding the problem of directly placing the packaging bag on the uneven rotor surface, which is susceptible to static electricity, causing the packaging bag to adhere to a certain part of the rotor surface, resulting in damage and affecting the packaging quality of the rotor surface. Attached Figure Description

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of an automatic device for assembling an auxiliary power unit rotor and bearing, as proposed in this invention. Figure 2 This is a schematic diagram of the structure after the slider drives the base to move outward for adjustment in this invention; Figure 3 This is a schematic diagram of the assembly mechanism in this invention; Figure 4 This is a cross-sectional view of the movable seat in this invention; Figure 5 This is a schematic diagram of the structure of the base and slider in this invention; Figure 6 This is a schematic diagram of the structure of the top of the base in this invention; Figure 7 This is a schematic diagram of the structure of the second buffer mechanism and the abutment plate in this invention; Figure 8 This is a schematic diagram of the protective mechanism in this invention; Figure 9 This is a schematic diagram of the assembled rotor assembly structure in this invention.

[0021] In the diagram: 1. Support frame; 2. Base plate; 3. Power equipment; 4. Coupling; 5. Torque sensor; 6. Circular plate; 7. Moving seat; 8. Guide rod; 9. Mounting plate; 10. Depth measuring instrument; 11. Slide groove; 12. Rectangular block; 13. Moving plate; 14. Base; 15. Second fixing ring; 16. Round rod; 17. First fixing ring; 18. Soft pad; 19. First lead screw; 20. First elastic cover; 21. Jet nozzle; 22. 23. Connecting pipe; 24. First buffer spring; 25. First damping rod; 26. First electric telescopic rod; 27. Slider; 28. First motor; 29. ​​Second lead screw; 30. Second elastic cover; 31. Ring; 32. Third electric telescopic rod; 33. Shielding cover; 34. Abutment plate; 35. Circular groove; 36. Second motor; 37. Second buffer spring; 38. Second damping rod; 39. Second electric telescopic rod; 30. Electric push rod. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Reference Figures 1-9An automatic device for assembling an auxiliary power unit rotor and bearing includes a support frame 1. A power device 3 is mounted on the top of the support frame 1. The output end of the power device 3 passes through the support frame 1 and is connected to a cylindrical connecting block via a coupling 4. A torque sensor 5 is mounted on the outer wall of the connecting block. A first lead screw 19 is mounted on the bottom of the connecting block via a circular plate 6. An assembly mechanism for assembling the rotor and bearing is provided on the outer wall of the first lead screw 19. A base plate 2 is mounted on the bottom of the support frame 1. A movable plate 13 is provided on the top of the base plate 2. A circular rod 16 is rotatably mounted at the center of the top of the movable plate 13. A base 14 for placing the rotor and bearing components is provided on the top edge of the base 14. A protective mechanism for shielding and protecting the components during assembly is provided at the top edge of the base 14. The power device 3 is a motor in the prior art, which, after starting, can drive the torque sensor 5, the connecting block, and the first lead screw 19 to rotate together via the coupling 4.

[0024] As an optimized technical solution of the present invention, the assembly mechanism includes a movable seat 7 mounted on the surface of the first lead screw 19, a plurality of guide rods 8 mounted on the inner top surface of the support frame 1, the movable seat 7 being connected to the plurality of guide rods 8 by sliding rods, and a first fixing ring 17 being connected to the bottom end of the movable seat 7 through a first buffer mechanism, with a soft pad 18 mounted on the bottom end of the first fixing ring 17. During rotation, the first lead screw 19 can drive the movable seat 7 and other components to move up and down together for adjustment.

[0025] As a technical optimization of the present invention, the first buffer mechanism includes a plurality of first damping rods 24 installed at the bottom of the movable seat 7. The bottom ends of the plurality of first damping rods 24 are all connected to the first fixing ring 17. The outer walls of the plurality of first damping rods 24 are fitted with first buffer springs 23. Two first electric telescopic rods 25 are also installed at the bottom of the movable seat 7. A first elastic cover 20 for shielding and protecting the first buffer mechanism is provided between the movable seat 7 and the first fixing ring 17. When the movable seat 7 moves downward for adjustment, driving the first buffer mechanism and the first fixing ring 17 and other components to move downward together, and pressing and assembling the rotor assembly and other components placed below, the elastic contraction of the plurality of first damping rods 24 and the first buffer springs 23 avoids direct rigid contact between the first fixing ring 17 and the components, reducing damage to the rotor assembly and other components during assembly, thereby improving the assembly quality between the rotor assembly and other components.

[0026] As a technical optimization of the present invention, an installation plate 9 is installed on the inner wall of one side of the support frame 1, and a depth measuring instrument 10 is installed on the outer wall of the installation plate 9. The detection probe of the depth measuring instrument 10 abuts against the top of the movable seat 7. An air jet head 21 is installed at the bottom of the soft pad 18. A connecting pipe 22 for connecting to an externally preset air jet device is provided on the outer wall of the movable seat 7. The connecting pipe 22 and the air jet head 21 are connected by a flexible hose. The detection probe at the bottom of the depth measuring instrument 10 is retractable. When the movable seat 7 is in its original position, its top end abuts against the detection probe, and the detection probe is in a retracted state. As the movable seat 7 moves downward, the detection probe can slowly extend downward. At this time, the depth of the movement of the movable seat 7 can be detected, thereby determining whether the assembly between the rotor assembly and other components is in place. After the output end of the externally preset air jet device is connected to the connecting pipe 22, the air jet head 21 sprays high-pressure gas downward to clean the inside of the assembled rotor assembly, preventing impurities from remaining inside the rotor assembly and affecting subsequent use.

[0027] As a technical optimization of the present invention, a groove 11 is provided on the top of the base plate 2. A slider 26 is installed inside the groove 11, and a rectangular block 12 is installed on the top of the slider 26. The rectangular block 12 is connected and fixed to the moving plate 13. A linear motor is preset inside the groove 11. The linear motor can drive the slider 26 to move back and forth inside the groove 11, thereby driving the rectangular block 12 and other components to move back and forth on the top of the base plate 2 for adjustment.

[0028] As a technical optimization of the present invention, a first motor 27 is installed at the bottom of one end of the movable plate 13, and a second lead screw 28 is installed at the output end of the first motor 27. A vertical rod is installed at the top of the other end of the movable plate 13, and the two ends of the base 14 are respectively connected and cooperated with the second lead screw 28 and the vertical rod. After the first motor 27 is started, it can drive the second lead screw 28 to rotate, thereby driving the base 14 to move up and down along the second lead screw 28 and the vertical rod for adjustment.

[0029] As a technical optimization of the present invention, a second motor 35 is installed inside the rectangular block 12. The output end of the second motor 35 is connected to the bottom end of the round rod 16, and the top end of the base 14 is connected to a second fixing ring 15 through a second buffer mechanism. After the second motor 35 is started, it can drive the round rod 16 to rotate and adjust.

[0030] As a technical optimization of the present invention, two grooves are formed on the outer wall of the round rod 16, and two electric push rods 39 are installed inside each of the two grooves. The telescopic ends of the two electric push rods 39 are jointly fitted with abutment plates 33. During the telescopic process, the telescopic ends of the two electric push rods 39 can drive the abutment plates 33 to extend and retract.

[0031] As a technical optimization of the present invention, the second buffer mechanism includes a plurality of second damping rods 37 installed on the top of the base 14. The top ends of the plurality of second damping rods 37 are all connected to the second fixing ring 15. The outer walls of the plurality of second damping rods 37 are fitted with second buffer springs 36. Two second electric telescopic rods 38 are also installed on the top of the base 14. A second elastic cover 29 for shielding and protecting the second buffer mechanism is provided between the base 14 and the second fixing ring 15. When the relevant components are placed on the top of the base 14, they will be placed on the top of the second fixing ring 15. Since the top of the second fixing ring 15 is provided with a rubber pad, when the assembly mechanism applies pressure to the rotor assembly, the components in contact with the top of the second fixing ring 15 can be buffered by the plurality of second damping rods 37 and the second buffer springs 36, avoiding direct rigid contact between the components and the second fixing ring 15, which would cause damage to the surface of the components.

[0032] As a technical optimization of the present invention, the protective mechanism includes a circular groove 34 opened at the top of the base 14, a shield 32 installed inside the groove 34, a ring 30 installed at the top of the shield 32, and a plurality of third electric telescopic rods 31 installed at the edge of the base 14. The telescopic ends of the plurality of third electric telescopic rods 31 are all connected to the ring 30. During the telescopic process, the telescopic ends of the plurality of third electric telescopic rods 31 can drive the ring 30 to move up and down at the top of the base 14 for adjustment, thereby driving the shield 32 to telescopically adjust at the top of the base 14.

[0033] In this invention, when the user uses the device, first, the slider 26 is controlled to move outward within the slide groove 11, causing multiple components, including the base 14, to move outward from the support frame 1. Then, the operator sequentially mounts the bearing housing, APU bearing, sealing ring assembly, base, and rotor assembly onto the surface of the round rod 16, stacking them above the second fixing ring 15 on top of the base 14. Subsequently, the slider 26 is controlled to move and reset within the slide groove 11, moving the base 14 and the multiple components to be assembled placed on its top into the support frame 1. After ensuring that the round rod 16 and the first lead screw 19 are on the same axis, the power device 3 is started, causing the first lead screw 19 to rotate synchronously. The moving seat 7 then slowly moves downward along the surface of the first lead screw 19, causing the soft pad 18 and the first fixing ring 17 to move downward together, slowly pressing down on the uppermost rotor assembly until the rotor assembly and other components are pressed and assembled in place, thus achieving automatic assembly of the rotor assembly and other components.

[0034] When the aforementioned movable seat 7 moves the first fixed ring 17 and the soft pad 18 slowly downward to press and assemble the rotor assembly, the first buffer mechanism set between the movable seat 7 and the first fixed ring 17, and the second buffer mechanism set on the top of the base 14, can respectively buffer and release force on the top and bottom of the assembled parts, avoiding direct rigid contact between the parts and the first fixed ring 17 and the second fixed ring 15, improving the safety and quality of the rotor assembly and other multiple parts during the assembly process, and reducing damage caused by rigid contact.

[0035] Meanwhile, thanks to the torque sensor 5, the torque can be collected in real time during the rotation of the first lead screw 19 driven by the power device 3. This allows for the acquisition of axial force data during the installation process. Furthermore, the depth measuring instrument 10 can detect the downward movement depth of the moving seat 7, indicating whether the rotor assembly and other components are properly assembled. This enables the device to control the axial force during the assembly of the same batch of rotor assemblies and other components, and to determine whether the rotor assembly is properly assembled. This ensures the consistency of the assembly of the same batch of rotor assemblies and other components, reduces errors caused by manual assembly, and improves assembly efficiency.

[0036] After the aforementioned movable seat 7 moves the soft pad 18 below into the rotor assembly, the external preset jet device can be activated, so that the jet head 21 can spray high-pressure air downwards into the rotor assembly and other components to blow away and clean any impurities that may remain inside the rotor assembly and other components, thus preventing impurities from being assembled into the rotor assembly and affecting the normal use of the rotor assembly.

[0037] Because a protective mechanism is provided at the top edge of the base 14, in order to prevent the components from being damaged due to excessive pressure during the assembly process and subsequently splashing outwards, posing a safety hazard to nearby workers, after the slider 26 moves the base 14 and other components into the support frame 1, the telescopic ends of multiple third electric telescopic rods 31 are controlled to extend upwards together, pushing the ring 30 to move upwards and pulling the shield 32 to extend and unfold upwards, thus shielding and protecting the components placed on top of the base 14 and improving the safety of the rotor assembly and other components during the assembly process.

[0038] After the rotor assembly and other components are assembled, it is necessary to check for axial movement during rotor rotation. First, control the upper assembly mechanism to move upwards, so that the soft pad 18 is flush with the top of the rotor. Then, control the extension ends of the two sets of electric push rods 39 to extend together, causing the two abutment plates 33 to abut against the inner wall of the assembled rotor. Control the extension ends of the two first electric telescopic rods 25 and the second electric telescopic rods 38 to extend together, so that the extension ends of the two first electric telescopic rods 25 abut against the top of the first fixed ring 17, and the extension ends of the two second electric telescopic rods 38 abut against the bottom of the second fixed ring 15. This ensures that the first and second buffer mechanisms are in a failed state at this time, i.e., the multiple first damping rods 24, the first... The two damping rods 37, the first buffer spring 23, and the second buffer spring 36 cannot extend or retract. Then, by controlling the second motor 35, the round rod 16 and the rotor assembled on its surface are driven to rotate together. Since the first fixed ring 17 and the second fixed ring 15 cannot continue to move up and down at this time, the elastic action of the first fixed ring 17 and the second fixed ring 15 through multiple first damping rods 24, the first buffer spring 23, and multiple second damping rods 37 and the second buffer spring 36 can be avoided from affecting the rotating rotor. This ensures that the axial movement data that may be generated during the rotation of the rotor driven by the round rod 16 is more accurate and reliable. This allows the staff to analyze the test data and adjust the parameters of the relevant components to ensure that the quality of the rotor assembled by the device meets the standards.

[0039] After the rotor is inspected, if the rotor quality meets the standards, the slider 26 can be controlled to move outward inside the slide groove 11, driving the base 14 and the rotor assembled on top to move outward from inside the support frame 1. At this time, the shield 32 is kept in the extended and unfolded state. After the rotor surface is manually treated for rust prevention or lubrication, the packaging bag is put on the surface of the shield 32. The top of the packaging bag is limited by manual or preset clamping equipment. Then, the telescopic ends of multiple third electric telescopic rods 31 are controlled to retract downward together, driving the ring 30 and the shield 32 to retract. At this time, the packaging bag can be put on the assembled rotor surface, improving the efficiency of putting the packaging bag on the rotor surface. It can also avoid the problem of directly putting the packaging bag on the uneven rotor surface, which is easily affected by static electricity, causing the packaging bag to adhere to a certain part of the rotor surface, causing the packaging bag to break and affecting the packaging quality of the rotor surface.

[0040] After the packaging bag is placed on the surface of the assembled rotor, the first motor 27 can be controlled to drive the second lead screw 28 to rotate, which will drive the base 14 and the packaged rotor on top to move upward together until the base 14 pushes the rotor to detach from the surface of the round rod 16. The assembled rotor with outer packaging can be quickly unloaded and transferred by manual or preset unloading robot, which improves the efficiency of the device in assembling multiple rotor components and other parts.

[0041] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic device for assembling an auxiliary power unit rotor and bearing, comprising a support frame (1), characterized in that, The top of the support frame (1) is equipped with a power device (3). The output end of the power device (3) passes through the support frame (1) and is connected to a cylindrical connecting block via a coupling (4). A torque sensor (5) is installed on the outer wall of the connecting block. A first lead screw (19) is installed at the bottom of the connecting block via a circular plate (6). An assembly mechanism for assembling the rotor and bearing is provided on the outer wall of the first lead screw (19). A base plate (2) is installed at the bottom of the support frame (1). A movable plate (13) is provided at the top of the base plate (2). A circular rod (16) is rotatably installed at the center of the top of the movable plate (13). A base (14) for placing the rotor and bearing components is provided at the top of the movable plate (13). A protective mechanism for shielding and protecting the components during assembly is provided at the top edge of the base (14).

2. The automatic device for assembling an auxiliary power unit rotor and bearing according to claim 1, characterized in that, The assembly mechanism includes a movable seat (7) mounted on the surface of the first lead screw (19), and multiple guide rods (8) are mounted on the inner top surface of the support frame (1). The movable seat (7) is connected to the multiple guide rods (8) by sliding rods. The bottom end of the movable seat (7) is connected to a first fixed ring (17) through a first buffer mechanism. A soft pad (18) is mounted on the bottom end of the first fixed ring (17).

3. The automatic device for assembling an auxiliary power unit rotor and bearing according to claim 2, characterized in that, The first buffer mechanism includes a plurality of first damping rods (24) installed at the bottom of the movable seat (7). The bottom ends of the plurality of first damping rods (24) are all connected to the first fixed ring (17). The outer walls of the plurality of first damping rods (24) are fitted with first buffer springs (23). The bottom of the movable seat (7) is also equipped with two first electric telescopic rods (25). A first elastic cover (20) for shielding and protecting the first buffer mechanism is provided between the movable seat (7) and the first fixed ring (17).

4. The automatic device for assembling an auxiliary power unit rotor and bearing according to claim 3, characterized in that, A mounting plate (9) is installed on one inner wall of the support frame (1), and a depth measuring instrument (10) is installed on the outer wall of the mounting plate (9). The detection probe of the depth measuring instrument (10) abuts against the top of the moving seat (7). A jet head (21) is installed at the bottom of the soft pad (18). A connecting pipe (22) for connecting to an externally preset jet device is provided on the outer wall of the moving seat (7). The connecting pipe (22) and the jet head (21) are connected by a hose.

5. The automatic device for assembling an auxiliary power unit rotor and bearing according to claim 1, characterized in that, The top of the base plate (2) is provided with a sliding groove (11), a slider (26) is installed inside the sliding groove (11), a rectangular block (12) is installed at the top of the slider (26), and the rectangular block (12) is connected and fixed to the moving plate (13).

6. The automatic device for assembling an auxiliary power unit rotor and bearing according to claim 5, characterized in that, The bottom of one end of the movable plate (13) is equipped with a first motor (27), the output end of the first motor (27) is equipped with a second lead screw (28), the top of the other end of the movable plate (13) is equipped with a vertical rod, and the two ends of the base (14) are connected and cooperated with the second lead screw (28) and the vertical rod respectively.

7. The automatic device for assembling an auxiliary power unit rotor and bearing according to claim 5, characterized in that, The rectangular block (12) is equipped with a second motor (35), the output end of the second motor (35) is connected to the bottom end of the round rod (16), and the top end of the base (14) is connected to a second fixing ring (15) through a second buffer mechanism.

8. The automatic device for assembling an auxiliary power unit rotor and bearing according to claim 7, characterized in that, The outer wall of the round rod (16) has two grooves, and two electric push rods (39) are installed inside the two grooves. The telescopic ends of the two electric push rods (39) are jointly installed with abutment plates (33).

9. The automatic device for assembling an auxiliary power unit rotor and bearing according to claim 7, characterized in that, The second buffer mechanism includes multiple second damping rods (37) installed on the top of the base (14). The top ends of the multiple second damping rods (37) are connected to the second fixing ring (15). The outer walls of the multiple second damping rods (37) are fitted with second buffer springs (36). Two second electric telescopic rods (38) are also installed on the top of the base (14). A second elastic cover (29) for shielding and protecting the second buffer mechanism is provided between the base (14) and the second fixing ring (15).

10. The automatic device for assembling an auxiliary power unit rotor and bearing according to claim 1, characterized in that, The protective mechanism includes a circular groove (34) opened on the top of the base (14), a shield (32) installed inside the circular groove (34), a ring (30) installed at the top of the shield (32), and multiple third electric telescopic rods (31) installed at the edge of the base (14), with the telescopic ends of the multiple third electric telescopic rods (31) all connected to the ring (30).

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