Diesel motor rotor single-arm lifting appliance structure design method

Abstract

The invention relates to the technical field of diesel motor rotor single-arm hangers, and discloses a diesel motor rotor single-arm hanger structure design method, which comprises the following steps: S1, establishing a three-dimensional model of a rotor single-arm hanger structure; s2, performing grid division and grid quality detection on the three-dimensional model of the rotor single-arm lifting appliance structure; s3, finite element boundary conditions are set when finite element analysis is carried out on the three-dimensional model of the rotor single-arm lifting appliance structure; s4, performing finite element solution on the three-dimensional model of the rotor single-arm lifting appliance structure; and S5, carrying out iterative optimization on the three-dimensional model of the rotor single-arm lifting appliance structure. Compared with a traditional experience design method, the rotor single-arm lifting appliance structure design method is more scientific and reasonable, the design method is simple and easy to implement, the requirement for the experience of designers is low, the design cost is reduced, meanwhile, the design period is shortened by at least 50% or above, and therefore the design efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of single-arm hoists for diesel engine rotors, and particularly to a structural design method for a single-arm hoist for a diesel engine rotor. Background Art

[0002] As a widely used power generation equipment, diesel generators are often used in industries with high power supply guarantee requirements such as medical treatment, communication, construction, and ships due to their reliable and flexible characteristics. The single-arm hoist for a diesel generator rotor is a special hoist frequently used in the rapid transfer of rotors and the assembly and disassembly of stators and rotors during mass production. Its safety and reliability cannot be ignored. The structure of the single-arm hoist for a rotor is a non-standard part welded by parts such as main bars, wing plates, reinforcing plates, and cylinders. At present, it mainly relies on empirical design methods, which require high experience from designers and are relatively cumbersome in the calculation and derivation of theoretical formulas, resulting in a long design cycle and high design costs. Summary of the Invention

[0003] To solve the problems that the current single-arm hoist for a rotor mainly relies on empirical design methods, requires high experience from designers, and is relatively cumbersome in the calculation and derivation of theoretical formulas, resulting in a long design cycle and high design costs, the present invention is realized through the following technical solutions: A structural design method for a single-arm hoist for a diesel generator rotor, including the following steps:

[0004] S1 Establish a three-dimensional model of the structure of the single-arm hoist for a rotor; S2 Perform mesh division and mesh quality inspection on the three-dimensional model of the structure of the single-arm hoist for a rotor; S3 Set the finite element boundary conditions for finite element analysis of the three-dimensional model of the structure of the single-arm hoist for a rotor; S4 Perform finite element solution on the three-dimensional model of the structure of the single-arm hoist for a rotor; S5 Perform iterative optimization on the three-dimensional model of the structure of the single-arm hoist for a rotor.

[0005] In the step S1, in a three-dimensional modeling software, establish a global coordinate system, draw the main bar and the wing plate, draw the reinforcing plate and the cylinder with reference to the dimensions of the main bar and the wing plate, and finally use the United Boolean operation function to bond and connect the main bar, the wing plate, the reinforcing plate, and the cylinder into one body to form a three-dimensional model of the structure of the single-arm hoist for a rotor.

[0006] In the step S2, use a mesh division software to perform mesh division on the three-dimensional model of the structure of the single-arm hoist for a rotor, and perform local mesh refinement on the joints between the main bar and the wing plate, the large fillets of the wing plate, the joints between the main bar and the reinforcing plate, the force contact surfaces of the cylinder, and the contact surfaces between the wing plate and the chute plate to obtain a mesh model of the structure of the single-arm hoist for a rotor. Check the mesh quality according to GB / T33582-2017 "General Rules for Finite Element Mechanical Analysis of Mechanical Product Structures", and control the aspect ratio of its elements not to be greater than 5.0 and the skewness not to be greater than 60° by adjusting the tetrahedral element size division parameters.

[0007] In step S3, the mesh model of the rotor single-arm sling structure obtained in step S2 is imported into the finite element analysis software. A friction connection is set for the contact areas between the rotor single-arm sling, the chute plate, and the rotor body, with a friction coefficient of 0.15. To simulate the most severe working conditions during lifting, the chute plate is constrained in the Y direction at the outermost end of the wing plate and in the axial direction of the rotor to prevent rigid body movement during the calculation process.

[0008] In step S4, the finite element analysis software is used to perform a finite element analysis on the rotor single-arm sling structure to obtain the overall equivalent stress distribution diagram, overall displacement distribution diagram, displacement distribution diagram in the X direction, Y direction, and Z direction under the Cartesian coordinate system of the rotor single-arm sling structure.

[0009] In step S5, based on the finite element analysis results obtained in step S4 and combined with the mechanical property parameters of the material of the rotor single-arm sling structure, it is judged whether the static strength design of the rotor single-arm sling structure is reasonable; if the maximum equivalent stress value of the finite element analysis results is lower than two-thirds of the material yield strength, then this structure is considered to have a reasonable static strength design, otherwise, the structural dimensions of the relevant components need to be redesigned, and then steps S2 to S4 are repeated until the static strength of the rotor single-arm sling structure meets the design requirements.

[0010] In step S5, after the static strength of the rotor single-arm sling meets the requirements, a buckling stability analysis is performed on it to judge whether the critical load factor corresponding to the first-order buckling mode meets the design requirement of being greater than 4. If it meets, then the structural stability design is considered reasonable, and both the structural safety and stability reach the expected goals. Otherwise, the structural dimensions need to be continuously optimized, and steps S2 to S4 are repeated until the buckling stability of the rotor single-arm sling meets the design requirements.

[0011] A single-arm hoist clamp device for a diesel motor rotor comprises a main rib, the outside of the main rib is fixedly connected to a wing plate, the outside of the main rib is slidably connected to a slide plate, the outside of the wing plate is fixedly connected to a reinforcement plate, the outside of the reinforcement plate is fixedly connected to a cylinder, the inner wall of the cylinder is sleeved with a rotor body, the inside of the slide plate is provided with a socket, the inside of the socket is slidably connected to a bolt, one end of the bolt is threadedly connected to a nut, the outside of the bolt is threadedly connected to a fixing plate, the socket provided in the slide plate is for the bolt to be inserted, the fixing plate and the slide plate are connected by screwing on the nut, and the top of the fixing plate The outer inner wall of the threaded moving plate is threadedly connected to the threaded rod 2, one end of the threaded rod 2 is fixedly connected to the rotating shaft, the outer rotatable connection of the rotating shaft is an L-shaped clamping plate, the outer side of the L-shaped clamping plate is fixedly connected to the motor, the motor is used to provide power to drive the rotating shaft to rotate, thereby driving the threaded rod 2 to rotate, so that the threaded moving plate 1 moves along the threaded rod 2, one side of the L-shaped clamping plate is close to the outside of the main reinforcement, the L-shaped clamping plate is used to clamp one end of the main reinforcement, clamp the main reinforcement, thereby driving the rotor body to move, ensuring that the rotor body can be lifted and moved smoothly.

[0012] As a further description of the above technical solution:

[0013] One end of the threaded rod 2 is rotatably connected to a mountain-shaped plate, which is used to allow the threaded movable plate 1 to rotate smoothly and is also used to connect a damper. The bottom of the mountain-shaped plate is fixedly connected to the damper, and one end of the damper is fixedly connected to a fitting plate, and the fitting plate is against one side of the main reinforcement. The damper is used to provide elastic force so that the fitting plate can fit the main reinforcement, thereby clamping the main reinforcement.

[0014] As a further description of the above technical solution:

[0015] One end of the second threaded rod is fixedly connected to a rotating shaft, and the outside of the rotating shaft is rotatably connected to a reel plate, and the bottom of the reel plate is against the top of the reinforcing plate. The reel plate is used to support the rotating shaft so that the rotating shaft can be smoothly rotated by the second threaded rod.

[0016] As a further description of the above technical solution:

[0017] The outer sleeve of the rotating shaft is provided with a tension rope, and the top of the reel plate is fixedly connected with a door-shaped plate. When the rotating shaft rotates, the tension rope is driven to be stored and released, and the tension rope pulls the receiving block to apply a tension to the receiving block.

[0018] As a further description of the above technical solution:

[0019] A runner is rotatably connected to the inner side of the portal plate, and the tension rope is slidably connected to the outside of the runner. The portal plate is used to connect and rotate the runner, and the tension rope slides on the runner. The runner provides a tension for the tightened tension rope, while reducing the friction of the tension rope and preventing the tension rope from contacting the reel plate, thereby reducing the risk of damage to the tension rope.

[0020] As a further description of the above technical solution:

[0021] One end of the tension rope is fixedly connected with a receiving block, and a second suspension rope is fixedly connected to the top of the receiving block. The tension rope is used to connect the second suspension rope and the first suspension rope, playing a receiving effect to enable the tension rope to pull the second suspension rope and the first suspension rope.

[0022] As a further description of the above technical solution:

[0023] The bottom of the receiving block is fixedly connected with a first suspension rope, and one end of the first suspension rope is fixedly connected to the top of the threaded moving plate one. The first suspension rope is used to connect the threaded moving plate one.

[0024] The present invention has the following beneficial effects:

[0025] 1. Compared with the traditional empirical design method, the present invention is more scientific and reasonable. The design method is simple and easy to implement, has low requirements for the experience of designers, reduces the design cost, and at the same time shortens the design cycle by at least more than 50%, thereby improving the design efficiency.

[0026] 2. In the present invention, when the L-shaped clamping plate is close to one end of the main reinforcement, the bolt is passed through the fixing plate and the jack of the rotor main body, and at the same time, the damper is squeezed to make the fitting plate clamp both sides of the main reinforcement. The motor is started to make the chute plate move along the main reinforcement, and the position of the chute plate is adjusted in real time. At the same time, the rotating shaft is driven to rotate, so that the tension rope is always in a tightened state. When the rotor main body is lifted, the rotor main body can be kept in a horizontal state, thereby preventing the rotor main body from swinging or slipping off. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the system flow of the present invention;

[0028] Figure 2 It is a three-dimensional model schematic diagram of the structure of the rotor single-arm hoist in this embodiment;

[0029] Figure 3 It is a grid model schematic diagram of the structure of the rotor single-arm hoist in this embodiment;

[0030] Figure 4 It is a schematic diagram of the load constraint conditions of the structure of the rotor single-arm hoist in this embodiment;

[0031] Figure 5Schematic diagram of the overall equivalent stress distribution of the rotor single-arm hanger structure in this embodiment;

[0032] Figure 6 Schematic diagram of the overall displacement distribution of the rotor single-arm hanger structure in this embodiment;

[0033] Figure 7 Schematic diagram of the Y-direction (lifting direction) displacement distribution of the rotor single-arm hoist structure in the Cartesian coordinate system in this embodiment;

[0034] Figure 8 Schematic diagram of the first-order buckling mode of the rotor single-arm hanger structure in the Cartesian coordinate system in this embodiment

[0035] Figure 9 This is a schematic diagram of the L-shaped clamp structure of a single-arm hanger clamp device for a diesel motor rotor proposed by the present invention;

[0036] Figure 10 This is a schematic diagram of the structure of the threaded rod 2 of a single-arm hanger clamp device for a diesel motor rotor proposed by the present invention;

[0037] Figure 11 This is a schematic diagram of the motor structure of a single-arm hanger clamp device for a diesel motor rotor proposed by the present invention;

[0038] Figure 12 This is a schematic diagram of the tension rope structure of a single-arm hanger clamp device for a diesel motor rotor proposed by the present invention;

[0039] Figure 13 This is a schematic diagram of the damper structure of a single-arm hanger clamp device for a diesel motor rotor proposed by the present invention;

[0040] Figure 14 This is a flow chart of a method for designing a single-arm hanger structure for a diesel generator rotor proposed in the present invention.

[0041] Legend:

[0042] 1. Main reinforcement; 2. Wing plate; 3. Reinforcement plate; 4. Cylinder; 5. Slide plate; 6. Rotor body; 7. Bolt; 8. Fixed plate; 9. Threaded movable plate 1; 10. Threaded rod 2; 11. Rotating shaft; 12. L-shaped clamping plate; 13. Motor; 14. Mountain-shaped plate; 15. Damper; 16. Fitting plate; 17. Rotating shaft; 18. Reel plate; 19. Gate plate; 20. Rotor; 21. Tension rope; 22. Support block; 23. Lifting rope 1; 24. Lifting rope 2; 25. Nut. DETAILED DESCRIPTION

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0044] An embodiment of the structural design method of the single-arm hoist for diesel engine rotors is as follows:

[0045] Refer to Figure 1 、 Figure 2 and Figure 14 A structural design method for a single-arm hoist of a diesel engine rotor includes the following steps: A structural design method for a single-arm hoist of a diesel generator rotor includes the following steps. S1: Establish a three-dimensional model of the single-arm hoist structure of the rotor; S2: Perform mesh division and mesh quality inspection on the three-dimensional model of the single-arm hoist structure of the rotor; S3: Set the finite element boundary conditions for finite element analysis of the three-dimensional model of the single-arm hoist structure of the rotor; S4: Perform finite element solution on the three-dimensional model of the single-arm hoist structure of the rotor; S5: Perform iterative optimization on the three-dimensional model of the single-arm hoist structure of the rotor.

[0046] In step S1, in the three-dimensional modeling software, establish a global coordinate system, draw the main rib 1 and the wing plate 2, draw the reinforcing plate 3 and the cylinder 4 with reference to the dimensions of the main rib 1 and the wing plate 2, and finally use the United Boolean operation function to bond and connect the main rib 1, the wing plate 2, the reinforcing plate 3 and the cylinder 4 together to form a three-dimensional model of the single-arm hoist structure of the rotor.

[0047] Refer to Figure 3 In step S2, use the mesh division software to perform mesh division on the three-dimensional model of the single-arm hoist structure of the rotor, and perform local mesh refinement on the joints between the main rib and the wing plate 1, the large fillets of the wing plate 2, the joints between the main rib 1 and the reinforcing plate 3, the force-bearing contact surfaces of the cylinder 4, and the contact surfaces between the wing plate 2 and the chute plate 5 to obtain the mesh model of the single-arm hoist structure of the rotor. Check the mesh quality according to GB / T33582-2017 "General Rules for Finite Element Mechanical Analysis of Mechanical Product Structures", and control the aspect ratio of its elements not to be greater than 5.0 and the skewness not to be greater than 60° by adjusting the tetrahedral element size division parameters.

[0048] Refer to Figure 4 、 Figure 5 In step S4, use the finite element analysis software to perform finite element analysis on the single-arm hoist structure of the rotor to obtain the overall equivalent stress distribution diagram, overall displacement distribution diagram, displacement distribution diagram in the X direction, Y direction displacement distribution diagram and Z direction displacement distribution diagram of the single-arm hoist structure of the rotor in the Cartesian coordinate system.

[0049] Refer toFigures 6 to 8 In step S4, the finite element analysis software is used to perform finite element analysis on the structure of the single-arm rotor sling, and the overall equivalent stress distribution diagram, overall displacement distribution diagram, displacement distribution diagram in the X direction, Y direction, and Z direction under the Cartesian coordinate system of the single-arm rotor sling structure are obtained.

[0050] In step S5, based on the finite element analysis results obtained in step S4 and combined with the mechanical property parameters of the material of the single-arm rotor sling structure, it is judged whether the static strength design of the single-arm rotor sling structure is reasonable; if the maximum equivalent stress value of the finite element analysis results is lower than two-thirds of the material yield strength, then this structure is considered to have a reasonable static strength design, otherwise, it is necessary to redesign the structural dimensions of the relevant components, and then repeat steps S2 to S4 until the static strength of the single-arm rotor sling structure meets the design requirements.

[0051] In step S5, after the static strength of the single-arm rotor sling meets the requirements, buckling stability analysis is carried out on it to judge whether the critical load factor corresponding to the first-order buckling mode meets the design requirement of being greater than 4. If it meets, then the structural stability design is considered reasonable, and both the structural safety and stability reach the expected goals. Otherwise, it is necessary to continue to optimize the structural dimensions and repeat steps S2 to S4 until the buckling stability of the single-arm rotor sling meets the design requirements.

[0052] Refer to Figures 9 to 11, A single-arm lifting fixture device for a diesel engine rotor, including a main bar 1. An wing plate 2 is fixedly connected to the outside of the main bar 1. A chute plate 5 is slidably connected to the outside of the main bar 1. A reinforcing plate 3 is fixedly connected to the outside of the wing plate 2. A cylinder 4 is fixedly connected to the outside of the reinforcing plate 3. A rotor main body 6 is sleeved on the inner wall of the cylinder 4. A jack is opened in the chute plate 5. A bolt 7 is slidably connected to the inside of the jack. One end of the bolt 7 is threadedly connected to a nut 25. A fixing plate 8 is threadedly connected to the outside of the bolt 7. The jack opened in the chute plate 5 is for allowing the bolt 7 to be inserted. The fixing plate 8 and the chute plate 5 are connected by screwing on the nut 25. A first threaded moving plate 9 is fixedly connected to the top of the fixing plate 8. A second threaded rod 10 is threadedly connected to the inner wall of the outside of the first threaded moving plate 9. One end of the second threaded rod 10 is fixedly connected to a rotating shaft 11. An L-shaped clamping plate 12 is rotatably connected to the outside of the rotating shaft 11. A motor 13 is fixedly connected to the outside of the L-shaped clamping plate 12. The motor 13 is used to provide power to drive the rotating shaft 11 to rotate, thereby driving the second threaded rod 10 to rotate, so that the first threaded moving plate 9 moves along the second threaded rod 10. One side of the L-shaped clamping plate 12 is close to the outside of the main bar 1. The L-shaped clamping plate 12 is used to clamp one end of the main bar 1 and clamp the main bar 1, thereby driving the rotor main body 6 to move, ensuring that the rotor main body 6 can be stably lifted and moved. One end of the second threaded rod 10 is rotatably connected to a mountain-shaped plate 14. The mountain-shaped plate 14 is used to allow the first threaded moving plate 9 to rotate smoothly and is also used to connect a damper 15. A damper 15 is fixedly connected to the bottom of the mountain-shaped plate 14. One end of the damper 15 is fixedly connected to a fitting plate 16, and the fitting plate 16 abuts against one side of the main bar 1. The damper 15 is used to provide elastic force so that the fitting plate 16 can fit the main bar 1, thereby clamping the main bar 1.

[0053] Refer to Figure 12 , Figure 13, one end of the second threaded rod 10 is fixedly connected to a rotating shaft 17. The outside of the rotating shaft 17 is rotatably connected to a reel plate 18, and the bottom of the reel plate 18 abuts against the top of the reinforcing plate 3. The reel plate 18 is used to support the rotating shaft 17, enabling the rotating shaft 17 to rotate smoothly driven by the second threaded rod 10. A tension rope 21 is sleeved outside the rotating shaft 17. The top of the reel plate 18 is fixedly connected to a portal plate 19. When the rotating shaft 17 rotates, it drives the tension rope 21 to be retracted and released, causing the tension rope 21 to pull the receiving block 22 and applying a pulling force to the receiving block 22. A rotating wheel 20 is rotatably connected to the inside of the portal plate 19, and the tension rope 21 is slidably connected to the outside of the rotating wheel 20. The portal plate 19 is used to connect and enable the rotating wheel 20 to rotate. The tension rope 21 slides on the rotating wheel 20, and the rotating wheel 20 provides a tension force to the tightened tension rope 21 while reducing the friction of the tension rope 21 and preventing the tension rope 21 from contacting the reel plate 18, thereby reducing the risk of damage to the tension rope 21. One end of the tension rope 21 is fixedly connected to a receiving block 22, and the top of the receiving block 22 is fixedly connected to a second suspension rope 24. The tension rope 21 is used to connect the second suspension rope 24 and the first suspension rope 23, serving as a connecting effect. In order to enable the tension rope 21 to pull the second suspension rope 24 and the first suspension rope 23, the bottom of the receiving block 22 is fixedly connected to the first suspension rope 23, and one end of the first suspension rope 23 is fixedly connected to the top of the first threaded moving plate 9. The first suspension rope 23 is used to connect the first threaded moving plate 9.

[0054] Working principle: When in use, insert one end of the rotor main body 6 into the cylinder 4, and then as Figure 9 and Figure 10 shown, bring the inside of the L-shaped clamping plate 12 close to one end of the main reinforcement 1, then squeeze the fitting plate 16, causing the damper 15 to deform, thereby adjusting the position of the fitting plate 16. Align the fitting plate 16 with the top of the main reinforcement 1, and release the fitting plate 16. At this time, the damper 15 loses the extrusion force from the fitting plate 16, and the damper 15 starts to rebound, driving the fitting plate 16 to move, enabling the fitting plate 16 to cooperate with the L-shaped clamping plate 12 to clamp the main reinforcement 1; at the same time, align the fixing plate 8 and the chute plate 5, insert the bolt 7 into the insertion holes opened in the fixing plate 8 and the chute plate 5, and screw the nut 25 onto one end of the bolt 7, thereby fixedly connecting the fixing plate 8 and the chute plate 5.

[0055] Start the crane to drive the telescopic movement of the second lifting rope 24, so as to lift the first threaded moving plate 9 through the receiving block 22 and the first lifting rope 23, and lift the main reinforcement 1 through the fixing plate 8, the bolt 7 and the chute plate 5, so that the rotor body 6 is lifted together with the main reinforcement 1; when the rotor body 6 shakes during the lifting process, start the motor 13 to drive the rotating shaft 11 to rotate, so as to drive the second threaded rod 10 to rotate. When the second threaded rod 10 rotates, it drives the first threaded moving plate 9 to move along the second threaded rod 10, adjusts the center of gravity of the overall device, so that the rotor body 6 remains balanced, avoids the shaking of the rotor body 6, causes the rotor body 6 to break away, and causes accidental damage to the rotor body 6.

[0056] When the second threaded rod 10 rotates, it will simultaneously drive the rotating shaft 17 to rotate, so that the rotating shaft 17 drives the tension rope 21 to rotate, thereby realizing the storage and release of the tension rope 21. When the rotor body 6 is lifted, the tension rope 21 is always in a taut state, giving a lateral tension to the receiving block 22 to ensure that the rotor body 6 can be lifted smoothly. At the same time, when the rotor body 6 is lifted, it moves smoothly. At the same time, the tension rope 21 slides on the runner 20, and the runner 20 gives an upward tension to the tension rope 21 to make the tension rope 21 in a taut state. At the same time, the runner 20 can rotate, so as to avoid touching the top of the reel plate 18 and reduce the friction of the tension rope 21, and avoid the breakage of the tension rope 21 due to friction.

[0057] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A structural design method for a single-arm lifting tool of a diesel generator rotor, characterized in that: It includes the following steps: S1, establishing a 3D model of the rotor single-arm sling structure; S2, performing mesh generation and mesh quality inspection on the 3D model of the rotor single-arm sling structure; S3, setting the finite element boundary conditions for the finite element analysis of the 3D model of the rotor single-arm sling structure; S4, performing finite element solution on the 3D model of the rotor single-arm sling structure; S5, performing iterative optimization on the 3D model of the rotor single-arm sling structure. In step S1, in the 3D modeling software, a global coordinate system is established, the main reinforcement (1) and the wing plate (2) are drawn, the reinforcement plate (3) and the cylinder (4) are drawn with reference to the dimensions of the main reinforcement (1) and the wing plate (2), and finally, the main reinforcement (1), the wing plate (2), the reinforcement plate (3) and the cylinder (4) are joined together by using the United Boolean operation function to form a 3D model of the rotor single-arm sling structure. In step S2, the 3D model of the rotor single-arm sling structure is meshed by using the mesh generation software, and local mesh refinement is performed at the joints between the main reinforcement and the wing plate (1), the large fillets of the wing plate (2), the joints between the main reinforcement (1) and the reinforcement plate (3), the force-bearing contact surfaces of the cylinder (4), and the contact surfaces between the wing plate (2) and the chute plate (5) to obtain the mesh model of the rotor single-arm sling structure. The mesh quality is inspected according to GB / T33582-2017 "General Rules for Finite Element Mechanical Analysis of Mechanical Product Structures", and by adjusting the tetrahedral element size division parameters, the aspect ratio of its elements is controlled not to be greater than 5.0, and the skewness is not to be greater than 60°. In step S3, the mesh model of the rotor single-arm sling structure obtained in step S2 is imported into the finite element analysis software, and a friction connection is set for the contact areas between the rotor single-arm sling and the chute plate (5) and the rotor main body (6), and the friction coefficient is 0.

15. In order to simulate the most severe working conditions during lifting, the chute plate (5) is constrained in the Y direction and the axial direction of the rotor at the outermost end position of the wing plate (2) to prevent rigid body movement during the calculation process. In step S4, the finite element analysis software is used to perform finite element analysis on the rotor single-arm sling structure to obtain the overall equivalent stress distribution diagram, the overall displacement distribution diagram, the displacement distribution diagram in the X direction, the displacement distribution diagram in the Y direction, and the displacement distribution diagram in the Z direction under the Cartesian coordinate system of the rotor single-arm sling structure. In step S5, based on the finite element analysis results obtained in step S4 and combined with the mechanical property parameters of the material of the rotor single-arm sling structure, it is judged whether the static strength design of the rotor single-arm sling structure is reasonable; if the maximum equivalent stress value of the finite element analysis results is lower than two-thirds of the material yield strength, it is considered that the static strength design of this structure is reasonable, otherwise, the structural dimensions of the relevant components need to be redesigned, and then steps S2 to S4 are repeated until the static strength of the rotor single-arm sling structure meets the design requirements. In step S5, after the static strength of the rotor single-arm sling meets the requirements, perform buckling stability analysis on it to determine whether the critical load factor corresponding to the first-order buckling mode meets the design requirement of being greater than 4. If it meets, it is considered that the structural stability design is reasonable, and both the structural safety and stability reach the expected goals. Otherwise, it is necessary to continue to optimize the structural dimensions and repeat steps S2 to S4 until the buckling stability of the rotor single-arm sling meets the design requirements.

2. A clamping device for a single-arm lifting tool of a diesel engine rotor, which adopts the structural design method of a single-arm lifting tool for a diesel generator rotor described in claim 1, and is characterized in that, It includes a main reinforcement bar (1), a wing plate (2) is fixedly connected to the outside of the main reinforcement bar (1), a chute plate (5) is slidably connected to the outside of the main reinforcement bar (1), a reinforcing plate (3) is fixedly connected to the outside of the wing plate (2), a cylinder (4) is fixedly connected to the outside of the reinforcing plate (3), a rotor main body (6) is sleeved on the inner wall of the cylinder (4), a jack is opened inside the chute plate (5), a bolt (7) is slidably connected inside the jack, one end of the bolt (7) is threadedly connected with a nut (25), a fixing plate (8) is threadedly connected to the outside of the bolt (7), a first threaded moving plate (9) is fixedly connected to the top of the fixing plate (8), a second threaded rod (10) is threadedly connected to the inner wall of the outside of the first threaded moving plate (9), one end of the second threaded rod (10) is fixedly connected with a rotating shaft (11), an L-shaped clamping plate (12) is rotatably connected to the outside of the rotating shaft (11), a motor (13) is fixedly connected to the outside of the L-shaped clamping plate (12), and one side of the L-shaped clamping plate (12) is close to the outside of the main reinforcement bar (1).

3. A single-arm lifting jig fixture device for a diesel engine rotor according to claim 2, characterized in that: One end of the second threaded rod (10) is rotatably connected with a mountain-shaped plate (14), a damper (15) is fixedly connected to the bottom of the mountain-shaped plate (14), and one end of the damper (15) is fixedly connected with a fitting plate (16), and the fitting plate (16) abuts against one side of the main reinforcement bar (1).

4. A single-arm lifting fixture device for a diesel engine rotor according to claim 3, characterized in that: One end of the second threaded rod (10) is fixedly connected with a rotating shaft (17), a reel plate (18) is rotatably connected to the outside of the rotating shaft (17), and the bottom of the reel plate (18) abuts against the top of the reinforcing plate (3).

5. The single-arm lifting jig fixture device for a diesel engine rotor according to claim 4, characterized in that: A pulling rope (21) is sleeved on the outside of the rotating shaft (17), and a portal plate (19) is fixedly connected to the top of the reel plate (18).

6. The single-arm sling fixture device for a diesel engine rotor according to claim 5, characterized in that: A rotating wheel (20) is rotatably connected to the inside of the portal plate (19), and the pulling rope (21) is slidably connected to the outside of the rotating wheel (20).

7. The clamping device of a single-arm hoist for a diesel engine rotor according to claim 6, characterized in that: One end of the pulling rope (21) is fixedly connected with a receiving block (22), and a second lifting rope (24) is fixedly connected to the top of the receiving block (22).

8. The clamping device of a single-arm lifting tool for a diesel engine rotor according to claim 7, characterized in that: A first lifting rope (23) is fixedly connected to the bottom of the receiving block (22), and one end of the first lifting rope (23) is fixedly connected to the top of the first threaded moving plate (9).

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