A method and system for dynamic design of membrane disc coupling with overload protection
By using two-dimensional Fourier axisymmetric element simulation and stiffness equivalence, the problem of complex and time-consuming dynamic design of diaphragm disc couplings was solved, and rapid and accurate critical speed assessment and safe operation were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- AECC SICHUAN GAS TURBINE RES INST
- Filing Date
- 2026-05-08
- Publication Date
- 2026-07-24
AI Technical Summary
Existing technologies for analyzing diaphragm couplings with overload protection suffer from problems such as large errors due to model simplification, complex modeling, and long processing time, making it difficult to quickly and reasonably perform dynamic design and affecting the safe operation of the shaft system.
The structure of the diaphragm disc coupling was simulated using two-dimensional Fourier axisymmetric elements. A two-dimensional model of the shaft connection structure was established, and dynamic analysis was performed through equivalent coupling fulcrum and joint bearing stiffness to calculate the critical speed. The parameters were then adjusted until the design requirements were met.
It enables rapid and accurate assessment of the critical speed of the diaphragm coupling, ensuring safe dynamic operation, simplifying the dynamic design process, and improving design efficiency.
Smart Images
Figure CN122452152A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of aero-engine technology and discloses a dynamic design method and system for diaphragm couplings with overload protection. Background Technology
[0002] Diaphragm couplings with overload protection are primarily used for power transmission in aero-engines and marine engines. They transmit power and torque through an extremely thin, variable-thickness diaphragm disc profile, and can resolve the problem of large deformation and inconsistency at the connection ends. Furthermore, these couplings are designed with spherical bearings to protect against torque and deflection angle overloads during operation, making them suitable for high-speed, high-torque, and high-power transmission applications. A schematic diagram is shown below. Figure 1 .
[0003] Compared to traditional couplings, diaphragm couplings with overload protection can be used at higher speeds, but this also introduces the risk of critical speeds within the operating range. Prolonged operation of the rotor system near these critical speeds can lead to rotor system failures, affecting shaft system safety. Therefore, the dynamic characteristics of diaphragm couplings with overload protection must meet design requirements. Diaphragm couplings with overload protection have complex structures and must coordinate with two complex transmission systems. Currently, the dynamic simulation analysis of rotor systems mainly employs two methods: the transfer matrix method and the finite element method. However, using the transfer matrix method to analyze diaphragm couplings with overload protection is prone to errors due to model simplification and issues related to force transmission paths and contact in the shaft system. Furthermore, the finite element method, commonly used in current literature, often involves building a three-dimensional model of the diaphragm coupling for analysis, a complex and time-consuming modeling process. Summary of the Invention
[0004] The purpose of this invention is to provide a dynamic design method and system for diaphragm couplings with overload protection, which can realize rapid and reasonable dynamic design of shaft connection structures with diaphragm couplings and effectively ensure the safe dynamic operation of diaphragm couplings.
[0005] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows:
[0006] A dynamic design method for diaphragm couplings with overload protection, comprising: Step 1: Analyze the shaft connection structure with the diaphragm coupling and extract the part of the shaft connection structure that transmits bending moment. The shaft connection structure includes a first shaft and a second shaft. The diaphragm coupling is coaxially disposed between the first shaft and the second shaft to transmit torque between the first shaft and the second shaft. The diaphragm coupling includes a drive shaft, and diaphragm assemblies are respectively disposed at both ends of the drive shaft to compensate for the non-coordinated deformation between the first shaft and the second shaft. Spherical plain bearings are respectively disposed between the two ends of the drive shaft and the first shaft and the second shaft. The inner ring of the spherical plain bearing is fixedly connected to the drive shaft, and the outer ring of the spherical plain bearing is fixedly connected to the corresponding first shaft and the second shaft. The spherical plain bearings are used to protect against torque overload and deflection angle overload. Step 2: Simulate the structure of the diaphragm disc coupling using two-dimensional Fourier axisymmetric elements, and establish a two-dimensional model of the shaft connection structure based on the part that transmits bending moment in the extracted shaft connection structure; wherein, the support points of the shaft connection structure are simulated using ground spring elements, and spring elements are established to simulate the outer and inner ring surfaces of the spherical bearing respectively; Step 3: Equivalently evaluate the stiffness of the coupling support points and the stiffness of the spherical bearings of the shaft connection structure, and conduct dynamic analysis on the two-dimensional model of the shaft connection structure under different rotational speeds to obtain the critical rotational speed of the shaft connection structure; Step 4: If the critical speed is higher than the maximum operating speed of the shaft connection structure, and the margin of the critical speed relative to the maximum operating speed is greater than the preset margin value, then the shaft connection structure meets the design requirements; otherwise, adjust the parameters of the shaft connection structure until the adjusted shaft connection structure meets the design requirements.
[0007] Furthermore, in step three, the stiffness of the coupling support points of the shaft connection structure is determined by the formula... Perform equivalent, where For the equivalent stiffness of the coupled support, The bearing stiffness at the fulcrum, To support the rigidity of the casing, To support the lifting frame of the casing; the stiffness of the spherical bearings in the shaft connection structure is equivalent to the stiffness of a spring element, with the spring element stiffness calculated as 1×10⁻⁶. 8 ~1×10 9 N / m is given.
[0008] Furthermore, the preset margin value mentioned in step four is 20%.
[0009] Furthermore, if the shaft connection structure does not meet the design requirements, the key structural parameters for adjusting the shaft connection structure include the supporting structure, the number of fulcrums, the span of the shaft system, and the inner and outer wall thickness parameters of the shaft system.
[0010] To achieve the above-mentioned technical effects, the present invention also provides a diaphragm coupling dynamic design system with overload protection, used to implement the aforementioned diaphragm coupling dynamic design method with overload protection, comprising: The structural analysis module is used to analyze the shaft connection structure with a diaphragm coupling and extract the portion of the shaft connection structure that transmits bending moment. The shaft connection structure includes a first shaft and a second shaft, and the diaphragm coupling is coaxially disposed between the first shaft and the second shaft to transmit torque between the first shaft and the second shaft. The diaphragm coupling includes a drive shaft, and diaphragm assemblies are respectively disposed at both ends of the drive shaft to compensate for the non-coordinated deformation between the first shaft and the second shaft. Spherical plain bearings are respectively disposed at both ends of the drive shaft and between the first shaft and the second shaft. The inner ring of the spherical plain bearing is fixedly connected to the drive shaft, and the outer ring of the spherical plain bearing is fixedly connected to the corresponding first shaft and second shaft, respectively. The spherical plain bearings are used to protect against torque overload and deflection angle overload. The two-dimensional model construction module is used to simulate the structure of the diaphragm disc coupling using two-dimensional Fourier axisymmetric elements, and to establish a two-dimensional model of the shaft connection structure based on the part of the shaft connection structure that transmits bending moment extracted from it; wherein, the support points of the shaft connection structure are simulated using ground spring elements, and the outer and inner ring surfaces of the spherical bearings are simulated using spring elements respectively; The critical speed analysis module is used to perform equivalent analysis on the stiffness of the coupling support points and the stiffness of the joint bearings of the shaft connection structure, and to conduct dynamic analysis on the two-dimensional model of the shaft connection structure under different speed conditions to obtain the critical speed of the shaft connection structure. The discrimination output module is used to determine whether the shaft connection structure meets the design requirements and output the design result when the critical speed is higher than the maximum operating speed of the shaft connection structure and the margin of the critical speed relative to the maximum operating speed is greater than the preset margin value; otherwise, the parameters of the shaft connection structure are adjusted until the adjusted shaft connection structure meets the design requirements.
[0011] Furthermore, in the critical speed analysis module, the stiffness of the coupling support points of the shaft connection structure is determined by the formula... Perform equivalent, where For the equivalent stiffness of the coupled support, The bearing stiffness at the fulcrum, To support the rigidity of the casing, To support the lifting frame of the casing; the stiffness of the spherical bearings in the shaft connection structure is equivalent to the stiffness of a spring element, with the spring element stiffness calculated as 1×10⁻⁶. 8 ~1×10 9 N / m is given.
[0012] Furthermore, in the discrimination output module, the preset margin value is 20%.
[0013] Furthermore, in the discrimination output module, the key structural parameters for adjusting the shaft connection structure include the support structure, the number of fulcrums, the span of the shaft system, and the inner and outer wall thickness parameters of the shaft system.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can comprehensively consider the influence of the connection structure and the support system on the dynamic characteristics, and quickly establish a dynamic model of the diaphragm coupling with overload protection consistent with the real boundary conditions, thereby accurately giving the dynamic characteristics of the diaphragm coupling with overload protection, and quickly and accurately evaluating the critical speed of the diaphragm coupling, realizing the rapid and reasonable dynamic design of the shaft connection structure with the diaphragm coupling, and effectively ensuring the safe dynamic operation of the diaphragm coupling. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the shaft connection structure with diaphragm disc coupling in Example 1 or 2; Figure 2 This is a flowchart of the dynamic design method for the diaphragm coupling with overload protection in Example 1 or 2; Figure 3 This is a block diagram of the dynamic design system of the diaphragm coupling with overload protection in Example 1; Figure 4 This is a two-dimensional model diagram of the shaft connection structure in Example 2; Figure 5 This is a schematic diagram of the diaphragm disc coupling spherical bearing in Example 2, which is simulated as a spring unit; The components include: 1. First rotating shaft; 2. Second rotating shaft; 3. Drive shaft; 4. Diaphragm disk assembly; 5. Joint bearing; 6. Structural analysis module; 7. Two-dimensional model construction module; 8. Critical speed analysis module; and 9. Discrimination output module. Detailed Implementation
[0016] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the above-described subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.
[0017] Example 1 See Figures 1 to 3 A dynamic design method for diaphragm disc couplings with overload protection, comprising: Step 1: Analyze the shaft connection structure with the diaphragm coupling and extract the part of the shaft connection structure that transmits bending moment. The shaft connection structure includes a first rotating shaft 1 and a second rotating shaft 2. The diaphragm coupling is coaxially disposed between the first rotating shaft 1 and the second rotating shaft 2 to transmit torque between the first rotating shaft 1 and the second rotating shaft 2. The diaphragm coupling includes a drive shaft 3. Diaphragm assemblies 4 are respectively disposed at both ends of the drive shaft 3 to compensate for the non-coordinated deformation between the first rotating shaft 1 and the second rotating shaft 2. Spherical plain bearings 5 are respectively disposed between the two ends of the drive shaft 3 and the first rotating shaft 1 and the second rotating shaft 2. The inner ring of the spherical plain bearing 5 is fixedly connected to the drive shaft 3, and the outer ring of the spherical plain bearing 5 is fixedly connected to the corresponding first rotating shaft 1 and the second rotating shaft 2. The spherical plain bearings 5 are used to protect against torque overload and deflection angle overload. Step 2: Simulate the structure of the diaphragm disc coupling using two-dimensional Fourier axisymmetric elements, and establish a two-dimensional model of the shaft connection structure based on the part that transmits bending moment in the extracted shaft connection structure; wherein, the support point of the shaft connection structure is simulated using ground spring elements, and spring elements are established to simulate the outer and inner ring surfaces of the spherical bearing 5 respectively; Step 3: Equivalently evaluate the stiffness of the coupling support point and the stiffness of the spherical bearing 5 of the shaft connection structure, and conduct dynamic analysis on the two-dimensional model of the shaft connection structure under different speed conditions to obtain the critical speed of the shaft connection structure; Step 4: If the critical speed is higher than the maximum operating speed of the shaft connection structure, and the margin of the critical speed relative to the maximum operating speed is greater than the preset margin value, then the shaft connection structure meets the design requirements; otherwise, adjust the parameters of the shaft connection structure until the adjusted shaft connection structure meets the design requirements.
[0018] In this embodiment, a two-dimensional model of the shaft connection structure is constructed by extracting the portion that transmits bending moment from the shaft connection structure. The stiffness of the coupling support points and the stiffness of the spherical bearings are treated equivalently, and dynamic analysis is performed under different speed conditions to calculate the critical speed of the shaft connection structure. Based on the relative magnitude between the critical speed and the maximum operating speed, it is determined whether the diaphragm coupling with overload protection meets the design requirements. This design method comprehensively considers the influence of the connection structure and the support system on the dynamic characteristics and quickly establishes a dynamic model of the diaphragm coupling with overload protection consistent with the actual boundary conditions. This accurately provides the dynamic characteristics of the diaphragm coupling with overload protection and quickly and accurately evaluates the critical speed of the diaphragm coupling, achieving rapid and reasonable dynamic design of the shaft connection structure with the diaphragm coupling and effectively ensuring the safe dynamic operation of the diaphragm coupling.
[0019] Based on the same inventive concept, this embodiment also provides a diaphragm coupling dynamic design system with overload protection, used to implement the aforementioned diaphragm coupling dynamic design method with overload protection, including: The structural analysis module 6 is used to analyze the shaft connection structure with diaphragm coupling and extract the part of the shaft connection structure that transmits bending moment. The shaft connection structure includes a first rotating shaft 1 and a second rotating shaft 2. The diaphragm coupling is coaxially disposed between the first rotating shaft 1 and the second rotating shaft 2 and is used to transmit torque between the first rotating shaft 1 and the second rotating shaft 2. The diaphragm coupling includes a drive shaft 3. Diaphragm assemblies 4 are respectively disposed at both ends of the drive shaft 3 to compensate for the non-coordinated deformation between the first rotating shaft 1 and the second rotating shaft 2. Spherical plain bearings 5 are respectively disposed between the two ends of the drive shaft 3 and the first rotating shaft 1 and the second rotating shaft 2. The inner ring of the spherical plain bearing 5 is fixedly connected to the drive shaft 3, and the outer ring of the spherical plain bearing 5 is fixedly connected to the corresponding first rotating shaft 1 and the second rotating shaft 2. The spherical plain bearings 5 are used to protect against torque overload and deflection angle overload. The two-dimensional model construction module 7 is used to simulate the structure of the diaphragm disc coupling using two-dimensional Fourier axisymmetric elements, and to establish a two-dimensional model of the shaft connection structure based on the part of the shaft connection structure that transmits bending moment extracted from it; wherein, the support point of the shaft connection structure is simulated using ground spring elements, and the outer and inner ring surfaces of the spherical bearing 5 are simulated using spring elements respectively; The critical speed analysis module 8 is used to perform equivalent analysis on the stiffness of the coupling support point and the stiffness of the spherical bearing 5 of the shaft connection structure, and to conduct dynamic analysis on the two-dimensional model of the shaft connection structure under different speed conditions to obtain the critical speed of the shaft connection structure. The discrimination output module 9 is used to determine that the shaft connection structure meets the design requirements and output the design result when the critical speed is higher than the maximum operating speed of the shaft connection structure and the margin of the critical speed relative to the maximum operating speed is greater than the preset margin value; otherwise, the parameters of the shaft connection structure are adjusted until the adjusted shaft connection structure meets the design requirements.
[0020] Example 2 See Figure 1 , Figure 2 , Figure 4 and Figure 5 A dynamic design method for diaphragm disc couplings with overload protection, comprising: Step 1: Analyze the shaft connection structure with the diaphragm coupling and extract the part of the shaft connection structure that transmits bending moment. The shaft connection structure includes a first rotating shaft 1 and a second rotating shaft 2. The diaphragm coupling is coaxially disposed between the first rotating shaft 1 and the second rotating shaft 2 to transmit torque between the first rotating shaft 1 and the second rotating shaft 2. The diaphragm coupling includes a drive shaft 3. Diaphragm assemblies 4 are respectively disposed at both ends of the drive shaft 3 to compensate for the non-coordinated deformation between the first rotating shaft 1 and the second rotating shaft 2. Spherical plain bearings 5 are respectively disposed between the two ends of the drive shaft 3 and the first rotating shaft 1 and the second rotating shaft 2. The inner ring of the spherical plain bearing 5 is fixedly connected to the drive shaft 3, and the outer ring of the spherical plain bearing 5 is fixedly connected to the corresponding first rotating shaft 1 and the second rotating shaft 2. The spherical plain bearings 5 are used to protect against torque overload and deflection angle overload. In this embodiment, the connection parts of the shaft system connection structure with diaphragm coupling are analyzed to identify bolted connections, fixed spline connections, and other forms that can effectively transmit bending moments. The connection parts of these structures are included in the shaft system connection structure of the diaphragm coupling, and the shaft system components that need to be analyzed are identified for subsequent dynamic model construction. However, the connection parts of floating splines and other connection structures that cannot transmit bending moments are not included in the subsequent dynamic model.
[0021] Step 2: Simulate the structure of the diaphragm disc coupling using two-dimensional Fourier axisymmetric elements, and establish a two-dimensional model of the shaft connection structure based on the part that transmits bending moment in the extracted shaft connection structure; wherein, the support point of the shaft connection structure is simulated using ground spring elements, and spring elements are established to simulate the outer and inner ring surfaces of the spherical bearing 5 respectively; In this embodiment, since the shaft connection structure of the diaphragm coupling is a circumferentially continuous structure, it can be modeled using a two-dimensional Fourier axisymmetric element (Volume Fouroer). The fulcrum of the shaft connection structure is simulated using grounding spring elements. Furthermore, the spherical plain bearing 5, used for overload protection, transmits force but not torque, and the translational motion of the outer and inner ring surfaces of the bearing is consistent. Therefore, spring elements are also established on the outer and inner ring surfaces of the bearing for simulation.
[0022] Step 3: Equivalently evaluate the stiffness of the coupling support points and the stiffness of the spherical bearing 5 in the shaft connection structure; In this embodiment, the spring unit can have all coefficients of its stiffness matrix defined by simply filling in the corresponding stiffness values. The stiffness of the coupling support points of the shaft connection structure is determined by the formula... Perform equivalent, where For the equivalent stiffness of the coupled support, For the bearing stiffness at the fulcrum (e.g.) Figure 4(K1, K2, K3, K4 in the text) To support the rigidity of the casing, To support the hoisting frame of the casing, the stiffness of the spherical bearing 5 in the shaft connection structure is equivalent to the stiffness of a spring element, with the spring element stiffness calculated as 1×10⁻⁶. 8 ~1×10 9 N / m is given.
[0023] Step 4: Perform dynamic analysis on the two-dimensional model of the shaft connection structure under different rotational speeds to obtain the critical rotational speed of the shaft connection structure; In this embodiment, a two-dimensional dynamic model of the shaft connection structure with diaphragm disc coupling is established according to the operations in steps one to three, and the critical speed is calculated.
[0024] Step 5: If the critical speed is higher than the maximum operating speed of the shaft connection structure, and the margin of the critical speed relative to the maximum operating speed is greater than the preset margin value, then the shaft connection structure meets the design requirements; otherwise, adjust the parameters of the shaft connection structure until the adjusted shaft connection structure meets the design requirements.
[0025] In this embodiment, the preset margin value is 20%. If the shaft connection structure does not meet the design requirements, the key structural parameters for adjusting the shaft connection structure include the support structure, the number of fulcrums, the span of the shaft system, and the inner and outer wall thickness parameters of the shaft system.
[0026] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A dynamic design method for a diaphragm coupling with overload protection, characterized in that, include: Step 1: Analyze the shaft connection structure with the diaphragm coupling and extract the part of the shaft connection structure that transmits bending moment. The shaft connection structure includes a first shaft and a second shaft. The diaphragm coupling is coaxially disposed between the first shaft and the second shaft to transmit torque between the first shaft and the second shaft. The diaphragm coupling includes a drive shaft, and diaphragm assemblies are respectively disposed at both ends of the drive shaft to compensate for the non-coordinated deformation between the first shaft and the second shaft. Spherical plain bearings are respectively disposed between the two ends of the drive shaft and the first shaft and the second shaft. The inner ring of the spherical plain bearing is fixedly connected to the drive shaft, and the outer ring of the spherical plain bearing is fixedly connected to the corresponding first shaft and the second shaft. The spherical plain bearings are used to protect against torque overload and deflection angle overload. Step 2: Simulate the structure of the diaphragm disc coupling using two-dimensional Fourier axisymmetric elements, and establish a two-dimensional model of the shaft connection structure based on the part that transmits bending moment in the extracted shaft connection structure; wherein, the support points of the shaft connection structure are simulated using ground spring elements, and spring elements are established to simulate the outer and inner ring surfaces of the spherical bearing respectively; Step 3: Equivalently evaluate the stiffness of the coupling support points and the stiffness of the spherical bearings of the shaft connection structure, and conduct dynamic analysis on the two-dimensional model of the shaft connection structure under different rotational speeds to obtain the critical rotational speed of the shaft connection structure; Step 4: If the critical speed is higher than the maximum operating speed of the shaft connection structure, and the margin of the critical speed relative to the maximum operating speed is greater than the preset margin value, then the shaft connection structure meets the design requirements; otherwise, adjust the parameters of the shaft connection structure until the adjusted shaft connection structure meets the design requirements.
2. The dynamic design method for diaphragm disc couplings with overload protection according to claim 1, characterized in that, In step three, the stiffness of the coupling support points of the shaft connection structure is determined by the formula... Perform equivalent, where For the equivalent stiffness of the coupled support, The bearing stiffness at the fulcrum, To support the rigidity of the casing, To support the lifting frame of the casing; the stiffness of the spherical bearings in the shaft connection structure is equivalent to the stiffness of a spring element, with the spring element stiffness calculated as 1×10⁻⁶. 8 ~1×10 9 N / m is given.
3. The dynamic design method for diaphragm disc couplings with overload protection according to claim 1, characterized in that, The preset margin value mentioned in step four is 20%.
4. The dynamic design method for diaphragm disc couplings with overload protection according to claim 3, characterized in that, If the shaft connection structure does not meet the design requirements, the key structural parameters for adjusting the shaft connection structure include the supporting structure, the number of fulcrums, the span of the shaft system, and the inner and outer wall thickness parameters of the shaft system.
5. A dynamic design system for diaphragm couplings with overload protection, used to implement the dynamic design method for diaphragm couplings with overload protection as described in claim 1, characterized in that, include: The structural analysis module is used to analyze the shaft connection structure with a diaphragm coupling and extract the portion of the shaft connection structure that transmits bending moment. The shaft connection structure includes a first shaft and a second shaft, and the diaphragm coupling is coaxially disposed between the first shaft and the second shaft to transmit torque between the first shaft and the second shaft. The diaphragm coupling includes a drive shaft, and diaphragm assemblies are respectively disposed at both ends of the drive shaft to compensate for the non-coordinated deformation between the first shaft and the second shaft. Spherical plain bearings are respectively disposed at both ends of the drive shaft and between the first shaft and the second shaft. The inner ring of the spherical plain bearing is fixedly connected to the drive shaft, and the outer ring of the spherical plain bearing is fixedly connected to the corresponding first shaft and second shaft, respectively. The spherical plain bearings are used to protect against torque overload and deflection angle overload. The two-dimensional model construction module is used to simulate the structure of the diaphragm disc coupling using two-dimensional Fourier axisymmetric elements, and to establish a two-dimensional model of the shaft connection structure based on the part of the shaft connection structure that transmits bending moment extracted from it; wherein, the support points of the shaft connection structure are simulated using ground spring elements, and the outer and inner ring surfaces of the spherical bearings are simulated using spring elements respectively; The critical speed analysis module is used to perform equivalent analysis on the stiffness of the coupling support points and the stiffness of the joint bearings of the shaft connection structure, and to conduct dynamic analysis on the two-dimensional model of the shaft connection structure under different speed conditions to obtain the critical speed of the shaft connection structure. The discrimination output module is used to determine whether the shaft connection structure meets the design requirements and output the design result when the critical speed is higher than the maximum operating speed of the shaft connection structure and the margin of the critical speed relative to the maximum operating speed is greater than the preset margin value; otherwise, the parameters of the shaft connection structure are adjusted until the adjusted shaft connection structure meets the design requirements.
6. The dynamic design system for diaphragm disc couplings with overload protection according to claim 5, characterized in that, In the critical speed analysis module, the stiffness of the coupling support points of the shaft connection structure is determined by the formula... Perform equivalent, where For the equivalent stiffness of the coupled support, The bearing stiffness at the fulcrum, To support the rigidity of the casing, To support the lifting frame of the casing; the stiffness of the spherical bearings in the shaft connection structure is equivalent to the stiffness of a spring element, with the spring element stiffness calculated as 1×10⁻⁶. 8 ~1×10 9 N / m is given.
7. The dynamic design method for diaphragm disc couplings with overload protection according to claim 5, characterized in that, In the discrimination output module, the preset margin value is 20%.
8. The dynamic design method for diaphragm disc couplings with overload protection according to claim 5, characterized in that, In the discrimination output module, the key structural parameters for adjusting the shaft connection structure include the support structure, the number of fulcrums, the span of the shaft system, and the inner and outer wall thickness parameters of the shaft system.