A method and system for evaluating the torque transmission of a rotor with a rabbet connection

Abstract

The present invention relates to the technical field of aeroengines, and discloses a method and system for evaluating the friction torque transmission of a rotor with a spigot connection. By analyzing, the minimum torque transmitted by friction at the mating spigot part is obtained, and then, the sum of the torque transmitted by friction at the axial end face of the mounting flange and the minimum torque transmitted by friction at the mating spigot part is used as the lower limit value of the friction torque transmission of the rotor with a spigot connection in a typical state, which is used as the evaluation basis for the rotor's torque transmission ability to meet the requirements. It ensures that the friction torque transmitted by the rotor meets the design requirements of advanced engines for high thrust-to-weight ratio, guarantees reliable torque transmission of the rotor, and can effectively reduce the working stress of the connection structure and the risk of failure of the connecting parts during operation; this lower limit value of the friction torque transmission takes into account both the friction torque transmission at the end face of the mounting flange and the friction torque transmission at the cylindrical surface of the spigot, can better reflect the actual situation of the friction torque transmitted by the rotor, more reasonably guide the torque transmission design of the rotor with a spigot connection, and effectively avoid the problem of redundant rotor structure design.

Description

Technical Field

[0001] The present invention relates to the technical field of aeroengines, and discloses a method and system for evaluating the friction torque transmission of a rotor with a spigot connection. Background Art

[0002] The short-bolt connection rotor structure with a cylindrical spigot is a connection structure widely used on advanced domestic and foreign aeroengine rotors. Its main functions are to connect adjacent rotors together, transmit torque and axial force, etc., and use the cylindrical spigot with tightness to ensure the centering between rotors. For the short-bolt rotor connection structure, the initial pre-tightening force of the bolts should be high enough to ensure reliable torque transmission during the operation of the rotor. However, at the same time, it is necessary to prevent the bolts from failing due to excessive stress when the pre-tightening force is too large.

[0003] The existing engineering evaluation methods for torque transmission of rotors with spigot connections only consider the friction torque transmission at the end face of the axial mounting edge and do not consider the contribution of the cylindrical spigot in the radial direction. However, for the short-bolt connection structure with a cylindrical spigot, in order to ensure the stability and reliability of the rotor, there is usually a large extrusion force at the cylindrical spigot during the operation of the rotor, and the torque transmitted through the cylindrical spigot cannot be ignored. Usually, measures such as increasing the initial pre-tightening force of the bolts or increasing the number of bolts are taken to ensure reliable torque transmission. When ensuring torque transmission by increasing the initial pre-tightening force of the bolts, it may cause the working load borne by the bolts to be too large, posing a risk of bolt failure and creating a safety hazard to the operation of the engine. When increasing the number of bolts to ensure torque transmission, it will increase the load of the rotor, reduce the bearing area of the rotor, have an adverse impact on the strength and fatigue life of the rotor, and increase the weight of the rotor, not meeting the control requirements of the weight index for advanced engines. In addition, experimental verification has shown that for the short-bolt connection structure with a cylindrical spigot, the current engineering evaluation method for torque transmission design is too conservative and is not conducive to the design requirements of advanced engines for high reliability and high thrust-to-weight ratio. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and system for evaluating the friction torque transmission of a rotor with a spigot connection, which can ensure reliable torque transmission of the rotor, effectively reduce the working stress of the connection structure, and reduce the risk of failure of the connecting parts during the working process; and can more reasonably guide the torque transmission design of the rotor with a spigot connection, effectively avoiding the problem of redundant design of the rotor structure.

[0005] In order to achieve the above technical effects, the technical solution adopted by the present invention is:

[0006] A method for evaluating the friction torque transmission of a rotor with a spigot connection includes:

[0007] According to the structural parameters and load parameters of the initially determined rotor and connecting parts, analyze and obtain the torque transmitted by the axial end face friction of the mounting edge; the rotor includes a first rotor part and a second rotor part arranged coaxially, the first rotor part is provided with a first mounting edge, the second rotor part is provided with a second mounting edge, the first mounting edge and the second mounting edge are coaxially connected by bolts, the second mounting edge is provided with a stop in the radial direction, and the radial edge of the first mounting edge is in interference fit with the stop;

[0008] According to the minimum diameter designed for the radial edge of the first mounting edge and the maximum radial height designed for the stop, analyze and obtain the minimum interference amount in the radial direction of the mating stop;

[0009] Adopt a two-dimensional axisymmetric model to conduct a linear elastic finite element analysis on the rotor and connecting part structure, and respectively obtain the extrusion force in the steady state and the extrusion force in the transient state at the typical state of the mating stop part; among them, the mating stop part is simulated by a contact unit, the stop is set as the target surface, the radial edge part of the first mounting edge is set as the contact surface, and the minimum interference amount data is applied to the mating stop part;

[0010] According to the minimum value of the extrusion force in the steady state and the extrusion force in the transient state, as well as the end face friction coefficient and the gyration radius of the mating stop part, analyze and obtain the minimum torque transmitted by the friction of the mating stop part;

[0011] Determine the sum of the torque transmitted by the axial end face friction of the mounting edge and the minimum torque transmitted by the friction of the mating stop part as the lower limit value of the friction transmission torque of the stop-connected rotor in the typical state;

[0012] Compare the lower limit value of the friction transmission torque of the stop-connected rotor in the typical state with the working torque of the mounting edge in the corresponding state. If the lower limit value of the friction transmission torque is greater than the working torque of the mounting edge in the corresponding state, the torque transmission capacity of the rotor meets the design requirements.

[0013] Furthermore, the torque transmitted by the axial end face friction of the mounting edge , where is the pitch circle radius of the bolt holes, is the axial pressing end face friction coefficient between the first rotor part and the second rotor part, is the effective clamping force of the bolt, is the number of bolts, is the axial separation load borne by the mounting edge during operation.

[0014] Furthermore, the minimum interference amount in the radial direction of the mating stop , where is the minimum diameter designed for the radial edge of the first mounting edge, is the maximum radial height designed for the stop.

[0015] Further, the method for obtaining the extrusion force under steady state and the extrusion force under transient state of the typical state at the mating spigot part by performing linear elastic finite element analysis on the rotor and connecting piece structure using a two-dimensional axisymmetric model includes:

[0016] Set the spigot as the target surface, set the radial edge part of the first mounting edge as the contact surface, apply the minimum interference amount data to the mating spigot part, and perform simulation analysis using contact elements to obtain the two-dimensional rotor finite element stress distributions under steady state and transient state of the typical state respectively;

[0017] According to the two-dimensional rotor finite element stress distributions in the corresponding states, extract the reaction force results of each node within the length of the rotor mating spigot in each state respectively, and obtain the extrusion force under steady state and the extrusion force under transient state of the mating spigot by summing up the reaction forces of all nodes of the mating spigot.

[0018] Further, the minimum torque transmitted by friction at the mating spigot part , where is the end face friction coefficient of the mating spigot part, is the minimum value of the extrusion force under steady state and the extrusion force under transient state, is the radius of gyration of the mating spigot part.

[0019] To achieve the above technical effects, the present invention also provides a spigot connection rotor friction torque transmission evaluation system, including:

[0020] A first analysis module, configured to analyze and obtain the torque transmitted by friction at the axial end face of the mounting edge according to the preliminarily determined structural parameters and load parameters of the rotor and connecting piece; the rotor includes a first rotor part and a second rotor part arranged coaxially, the first rotor part is provided with a first mounting edge, the second rotor part is provided with a second mounting edge, the first mounting edge and the second mounting edge are coaxially connected by bolts, the second mounting edge is provided with a spigot in the radial direction, and the radial edge of the first mounting edge is in interference fit with the spigot;

[0021] An interference amount determination module, configured to analyze and obtain the minimum interference amount in the radial direction of the mating spigot according to the designed minimum diameter of the radial edge of the first mounting edge and the designed maximum radial height of the spigot;

[0022] An extrusion force analysis module, configured to perform linear elastic finite element analysis on the rotor and connecting piece structure using a two-dimensional axisymmetric model to respectively obtain the extrusion force under steady state and the extrusion force under transient state of the typical state at the mating spigot part; wherein, the mating spigot part is simulated using contact elements, the spigot is set as the target surface, the radial edge part of the first mounting edge is set as the contact surface, and the minimum interference amount data is applied to the mating spigot part;

[0023] A second analysis module, configured to analyze and obtain the minimum torque transmitted by friction at the mating spigot portion according to the minimum value of the extrusion force under steady state and the extrusion force under transient state, as well as the end face friction coefficient and the rotational radius of the mating spigot portion.

[0024] A third analysis module, configured to determine that the sum of the torque transmitted by friction at the axial end face of the mounting edge and the minimum torque transmitted by friction at the mating spigot portion is the lower limit value of the torque transmitted by friction in the typical state of the spigot-connected rotor.

[0025] A judgment module, configured to compare the lower limit value of the torque transmitted by friction in the typical state of the spigot-connected rotor with the working torque of the mounting edge in the corresponding state. If the lower limit value of the torque transmitted by friction is greater than the working torque of the mounting edge in the corresponding state, the torque transmission capacity of the rotor meets the design requirements.

[0026] Further, in the first analysis module, the torque transmitted by friction at the axial end face of the mounting edge , where is the pitch circle radius of the bolt holes, is the axial pressing end face friction coefficient between the first rotor part and the second rotor part, is the effective clamping force of the bolts, is the number of bolts, is the axial separation load borne by the mounting edge during operation.

[0027] Further, in the interference amount determination module, the minimum interference amount in the radial direction of the mating spigot , where is the minimum designed diameter of the radial edge of the first mounting edge, is the maximum designed radial height of the spigot.

[0028] Further, in the extrusion force analysis module, by setting the spigot as the target surface, the radial edge portion of the first mounting edge as the contact surface, applying the minimum interference amount data to the mating spigot portion, and using contact element simulation analysis, the two-dimensional rotor finite element stress distributions under steady state and transient state in the typical state are obtained respectively.

[0029] According to the two-dimensional rotor finite element stress distributions in the corresponding states, the reaction force results of each node within the length of the rotor mating spigot are extracted respectively. By summing up the reaction forces of all nodes of the mating spigot, the extrusion force under steady state and the extrusion force under transient state of the mating spigot are obtained respectively.

[0030] Further, in the second analysis module, the minimum torque transmitted by friction at the mating spigot portion , where is the end face friction coefficient of the mating spigot portion, is the minimum value of the extrusion force under the steady state and the extrusion force under the transient state. is the radius of gyration for mating with the rabbet portion.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] The torque transmitted by the friction of the axial end face of the mounting edge in the present invention and the minimum torque transmitted by the friction of the mating rabbet portion sum up to the lower limit value of the friction transmission torque of the rabbet connecting the rotor in the typical state , which is used as the evaluation basis for ensuring that the torque transmission capacity of the rotor meets the requirements. It can ensure that the friction transmission torque of the rotor meets the design requirements of advanced engines for high thrust-to-weight ratio, ensure reliable torque transmission of the rotor, and effectively reduce the working stress of the connection structure and the risk of failure of the connecting parts during the working process; the lower limit value of the friction transmission torque takes into account both the friction torque transmission of the mounting edge end face and the friction torque transmission of the rabbet cylindrical surface, can better reflect the actual situation of the rotor friction transmission torque, more reasonably guide the torque transmission design of the rabbet connecting the rotor, and effectively avoid the problem of redundant rotor structure design. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is the flowchart of the friction torque transmission evaluation method for the rabbet connecting the rotor in Embodiment 1 or 2;

[0034] Figure 2 is the structural schematic diagram of the rotor and the connecting parts in Embodiment 1 or 2;

[0035] Figure 3 is the structural schematic diagram of the first rotor part in Embodiment 1 or 2;

[0036] Figure 4 is the structural schematic diagram of the second rotor part in Embodiment 1 or 2;

[0037] Figure 5 is the structural block diagram of the friction torque transmission evaluation system for the rabbet connecting the rotor in Embodiment 1;

[0038] Among them, 1 is the first rotor part; 101 is the first mounting edge; 2 is the second rotor part; 201 is the second mounting edge; 202 is the rabbet; 3 is the bolt; 4 is the first analysis module; 5 is the interference amount determination module; 6 is the extrusion force analysis module; 7 is the second analysis module; 8 is the third analysis module; 9 is the judgment module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. However, it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following embodiments. All technologies implemented based on the content of the present invention belong to the scope of the present invention.

[0040] Embodiment 1

[0041] Refer to Figures 1-5 , a method for evaluating the friction torque transmission of a rotor with a rabbet connection, comprising:

[0042] According to the preliminary determined structural parameters and load parameters of the rotor and the connecting piece, analyze and obtain the torque transmitted by the axial end face friction of the mounting edge; the rotor includes a first rotor part 1 and a second rotor part 2 arranged coaxially, the first rotor part 1 is provided with a first mounting edge 101, the second rotor part 2 is provided with a second mounting edge 201, the first mounting edge 101 and the second mounting edge 201 are coaxially connected by a bolt 3, the second mounting edge 201 is provided with a rabbet 202 in the radial direction, and the radial edge of the first mounting edge 101 is in interference fit with the rabbet 202;

[0043] According to the minimum diameter designed for the radial edge of the first mounting edge 101 and the maximum radial height designed for the rabbet 202, analyze and obtain the minimum interference amount in the radial direction of the mating rabbet part ;

[0044] Adopt a two-dimensional axisymmetric model to conduct a linear elastic finite element analysis on the rotor and connecting piece structures, and respectively obtain the steady-state extrusion force and the transient extrusion force at the typical state of the mating rabbet part; among them, the mating rabbet part is simulated by a contact element, the rabbet 202 is set as the target surface, the radial edge part of the first mounting edge 101 is set as the contact surface, and the minimum interference amount is applied to the mating rabbet part

[0045] According to the minimum value of the steady-state extrusion force , the transient extrusion force , as well as the end face friction coefficient of the mating rabbet part and the gyration radius of the mating rabbet part, analyze and obtain the minimum torque transmitted by the friction of the mating rabbet part ;

[0046] Determine the torque transmitted by the axial end face friction of the mounting edge and the minimum torque transmitted by the friction of the mating rabbet part

[0047] The sum of them is the lower limit value of the friction transmission torque of the rabbet 202 connecting the rotor in the typical state Compare the lower limit value of the friction transmission torque of the rabbet 202 connecting the rotor in the typical state with the working torque of the mounting edge in the corresponding state. If

[0048] In this embodiment, by setting the rabbet 202 as the target surface and the radial edge part of the first mounting edge 101 as the contact surface, and then applying an interference amount to the rabbet part data, a two-dimensional axisymmetric model is used to perform a linear elastic finite element analysis on the rotor and connecting piece structure to obtain the steady-state extrusion force at the mating rabbet part in a typical state and the extrusion force at the mating rabbet part under transient conditions in a typical state ; where the interference amount data takes into account the minimum radial dimension of the radial edge design of the first mounting edge 101 and the maximum radial dimension of the design of the rabbet 202, and more accurately simulates the stress distribution of the rotor and connecting piece under actual working conditions. Then, according to the minimum value of the steady-state extrusion force , the extrusion force under transient conditions , the minimum torque of frictional transmission at the mating rabbet part is analyzed and obtained . Finally, taking the sum of the torque of frictional transmission at the axial end face of the mounting edge and the minimum torque of frictional transmission at the mating rabbet part as the lower limit value of the frictional transmission torque when the rabbet 202 connects the rotor in a typical state , which is used as an evaluation basis for the rotor's torque transmission ability to meet the requirements. Ensure that the frictional transmission torque of the rotor meets the design requirements of advanced engines for high thrust-to-weight ratio, while ensuring reliable torque transmission of the rotor, effectively reducing the working stress of the connection structure, and reducing the risk of failure of the connecting piece during operation; this lower limit value of the frictional transmission torque takes into account both the frictional torque transmission at the end face of the mounting edge and the frictional torque transmission at the cylindrical surface of the rabbet 202, can better reflect the actual situation of the frictional transmission torque of the rotor, more reasonably guide the torque transmission design of the rabbet 202 connecting the rotor, and effectively avoid the problem of redundant rotor structure design.

[0049] Based on the same inventive concept, this embodiment also provides a rabbet 202 connecting rotor frictional torque transmission evaluation system, including:

[0050] The first analysis module 4 is used to analyze and obtain the torque of frictional transmission at the axial end face of the mounting edge according to the preliminarily determined structural parameters and load parameters of the rotor and the connecting piece; the rotor includes a first rotor part 1 and a second rotor part 2 arranged coaxially, the first rotor part 1 is provided with a first mounting edge 101, the second rotor part 2 is provided with a second mounting edge 201, the first mounting edge 101 and the second mounting edge 201 are coaxially connected by a bolt 3, the second mounting edge 201 is provided with a rabbet 202 in the radial direction, and the radial edge of the first mounting edge 101 is in interference fit with the rabbet 202;

[0051] The interference amount determination module 5 is configured to analyze and obtain the minimum interference amount in the radial direction of the mating rabbet portion according to the minimum designed diameter of the radial edge of the first mounting edge 101 and the maximum designed radial height of the rabbet 202. ;

[0052] The extrusion force analysis module 6 is configured to perform linear elastic finite element analysis on the rotor and connector structure using a two-dimensional axisymmetric model, and respectively obtain the steady-state extrusion force of the mating rabbet portion in a typical state and the extrusion force of the mating rabbet portion in the transient state of the typical state. Among them, the mating rabbet portion is simulated using a contact element. The rabbet 202 is set as the target surface, and the radial edge portion of the first mounting edge 101 is set as the contact surface. The minimum interference amount is applied to the mating rabbet portion. Data;

[0053] The second analysis module 7 is configured to analyze and obtain the minimum torque transmitted by friction of the mating rabbet portion according to the minimum value of the extrusion force in the steady state , the extrusion force in the transient state , the end face friction coefficient of the mating rabbet portion , and the gyration radius of the mating rabbet portion ; ;

[0054] The third analysis module 8 is configured to determine the torque transmitted by friction at the axial end face of the mounting edge and the sum of the minimum torque transmitted by friction of the mating rabbet portion as the lower limit value of the friction transmission torque of the rabbet 202 connecting the rotor in a typical state. ;

[0055] The judgment module 9 is configured to compare the lower limit value of the friction transmission torque of the rabbet 202 connecting the rotor in a typical state with the working torque of the mounting edge in the corresponding state . If , the torque transmission capacity of the rotor meets the design requirements.

[0056] Embodiment 2

[0057] See Figures 1-4 , a method for evaluating the friction torque transmission of the rabbet 202 connecting the rotor, including:

[0058] Step 1. According to the initially determined structural parameters and load parameters of the rotor and the connecting piece, analyze and obtain the torque transmitted by the axial end face friction of the mounting edge. The rotor includes a first rotor member 1 and a second rotor member 2 arranged coaxially. The first rotor member 1 is provided with a first mounting edge 101, and the second rotor member 2 is provided with a second mounting edge 201. The first mounting edge 101 and the second mounting edge 201 are coaxially connected by bolts 3. The second mounting edge 201 is provided with a stop 202 in the radial direction, and the radial edge of the first mounting edge 101 is in interference fit with the stop 202.

[0059] In this embodiment, according to the initially determined structural parameters and load parameters of the rotor and the connecting piece, analyze and obtain the torque transmitted by the axial end face friction of the mounting edge , where is the radius of the bolt circle of the bolt 3 holes, is the axial compression end face friction coefficient between the first rotor member and the second rotor member, is the effective clamping force of the bolt 3, is the number of bolts 3, is the axial separation load borne by the mounting edge during operation.

[0060] Step 2. According to the minimum designed diameter of the radial edge of the first mounting edge 101 and the maximum designed radial height of the stop 202, analyze and obtain the minimum interference amount in the radial direction of the mating stop part ;

[0061] In this embodiment, the minimum interference amount in the radial direction of the mating stop part , where is the minimum designed diameter of the radial edge of the first mounting edge 101, is the maximum designed radial height of the stop 202.

[0062] Step 3. Adopt a two-dimensional axisymmetric model to conduct a linear elastic finite element analysis on the rotor and connecting piece structure, and respectively obtain the steady-state extrusion force and the transient extrusion force of the mating stop part in the typical state; among them, the mating stop part is simulated by a contact unit, and the minimum interference amount data is applied to the mating stop part.

[0063] In this embodiment, when meshing the finite element model of the rotor and the connecting piece structure, the number of elements in the length direction of the mating spigot part should be no less than 5 layers, and the node positions of the mating spigot part should be kept as consistent as possible; in the finite element model, the mating spigot part is simulated by contact elements. Generally, the spigot 202 is set as the target surface, and the radial edge part of the first mounting edge 101 is set as the contact surface. The interference amount determined in the second step is applied to the mating spigot part. Data. The analysis states include but are not limited to the steady-state idle speed and the steady-state maximum state. In addition, typical transient loads such as fast push at idle speed maximum and fast pull at maximum and then idle speed should also be considered to obtain the two-dimensional rotor finite element stress results.

[0064] In the obtained two-dimensional rotor finite element stress results, the reaction force results of each node within the length of the rotor mating spigot part are extracted respectively ; By summing up the reaction forces of all nodes of the mating spigot part the extrusion force of the mating spigot part is obtained ; furthermore, the extrusion force results of the mating spigot part under steady state and the extrusion force results under transient state can be obtained respectively (in this embodiment, the minimum extrusion force value of the spigot 202 at the same rotational speed can be used as the transient extrusion force result).

[0065] Step Four: According to the minimum value of the extrusion force under steady state , the extrusion force under transient state , the end face friction coefficient of the mating spigot part , and the rotational radius of the mating spigot part , analyze and obtain the minimum torque of frictional transmission of the mating spigot part ;

[0066] In this embodiment, the minimum torque of frictional transmission of the mating spigot part , where is the end face friction coefficient of the mating spigot part, is the minimum value of the extrusion force under steady state and the extrusion force under transient state , is the rotational radius of the mating spigot part.

[0067] Step Five: Determine that the sum of the torque of frictional transmission of the axial end face of the mounting edge and the minimum torque of frictional transmission of the mating spigot part is the lower limit value of the frictional transmission torque of the spigot 202 connecting the rotor in the typical state .

[0068] Step 6: Compare the lower limit of the friction transmission torque of the rabbet 202 connecting the rotor in the typical state with the working torque of the mounting edge in the corresponding state. If , then the torque transmission capacity of the rotor meets the design requirements; otherwise, it is necessary to improve the structure of the mating rabbet part, and then repeat the work content of Steps 1 to 6 until .

[0069] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.​

Claims

1. A method for evaluating friction torque transmission of a stopper-connected rotor, characterized in that: include: According to the structural parameters and load parameters of the rotor and the connecting member determined initially, the torque transmitted by the friction of the axial end surface of the mounting edge is analyzed and obtained; the rotor comprises a first rotor member and a second rotor member arranged coaxially, the first rotor member is provided with a first mounting edge, the second rotor member is provided with a second mounting edge, the first mounting edge and the second mounting edge are coaxially connected by bolts, the second mounting edge is provided with a stopper in the radial direction, and the radial edge of the first mounting edge is interference fit with the stopper; According to the designed minimum diameter of the radial edge of the first mounting edge and the designed maximum radial height of the stopper, the minimum interference in the radial direction of the stopper is analyzed and obtained; A linear elastic finite element analysis is performed on the rotor and connector structure using a two-dimensional axisymmetric model to obtain the extrusion pressure of the mating stop in a typical steady state and the extrusion pressure of the typical transient state respectively; wherein the mating stop is simulated using a contact unit, the stop is set as a target surface, the radial edge of the first mounting edge is set as a contact surface, and the minimum interference amount data is applied to the mating stop; According to the minimum value of the extrusion pressure in the steady state and the extrusion pressure in the transient state, as well as the end surface friction coefficient of the mating stop part and the turning radius of the mating stop part, the minimum torque transmitted by the friction of the mating stop part is analyzed and obtained; Determine the sum of the torque transmitted by the axial end face friction of the mounting edge and the minimum torque transmitted by the friction of the mating stopper as the lower limit of the friction transmission torque of the stopper-connected rotor in a typical state; The lower limit value of the friction transmission torque of the stop-connected rotor under typical conditions is compared with the working torque of the mounting side under the corresponding conditions. If the lower limit value of the friction transmission torque is greater than the working torque of the mounting side under the corresponding conditions, the rotor torque transmission capacity meets the design requirements.

2. The method for evaluating friction torque transmission of a stopper-connected rotor according to claim 1, characterized in that: Torque transmitted by friction of the axial end face of the mounting edge ,in is the bolt hole pitch circle radius, is the axial compression end surface friction coefficient of the first rotor member and the second rotor member, is the effective clamping force of the bolt, is the number of bolts, It is the axial separation load borne by the mounting side when working.

3. The method for evaluating friction torque transmission of a stopper-connected rotor according to claim 1, characterized in that: Minimum interference in the direction of the stop radius ,in Design the minimum diameter for the radial edge of the first mounting edge, The maximum radial height designed for the stop.

4. The method for evaluating friction torque transmission of a stopper-connected rotor according to claim 1, characterized in that: The linear elastic finite element analysis of the rotor and the connector structure is performed using a two-dimensional axisymmetric model. The methods for obtaining the extrusion pressure of the mating stop in a typical steady state and the extrusion pressure in a typical transient state include: The stopper is set as the target surface, the radial edge of the first mounting edge is set as the contact surface, the minimum interference data is applied to the stopper, and a contact unit simulation analysis is performed to obtain the two-dimensional rotor finite element stress distribution under typical steady-state and transient conditions respectively; According to the finite element stress distribution of the two-dimensional rotor under the corresponding state, the support reaction force results of each node within the rotor fitting length under each state are extracted respectively. By summing the support reaction forces of all nodes of the fitting, the extrusion pressure of the fitting under steady state and transient state are obtained respectively.

5. The method for evaluating friction torque transmission of a stopper-connected rotor according to claim 1, characterized in that: Minimum torque transmitted by friction at the mating stop ,in To match the friction coefficient of the end surface of the stopper, is the minimum value of the extrusion pressure in the steady state and the extrusion pressure in the transient state, To match the turning radius of the stop part.

6. A stopper-connected rotor friction torque transmission evaluation system, characterized in that: include: A first analysis module is used to analyze and obtain the torque transmitted by the axial end face friction of the mounting edge according to the structural parameters and load parameters of the rotor and the connecting member that are preliminarily determined; the rotor comprises a first rotor member and a second rotor member that are coaxially arranged, the first rotor member is provided with a first mounting edge, the second rotor member is provided with a second mounting edge, the first mounting edge and the second mounting edge are coaxially connected by bolts, the second mounting edge is provided with a stopper in a radial direction, and a radial edge of the first mounting edge is interference fit with the stopper; An interference determination module is used to analyze and obtain the minimum interference in the radial direction of the mating stop according to the designed minimum diameter of the radial edge of the first mounting edge and the designed maximum radial height of the stop; An extrusion pressure analysis module is used to perform a linear elastic finite element analysis on the rotor and connector structure using a two-dimensional axisymmetric model, and obtain the extrusion pressure of the mating stop portion under a typical steady state and a typical transient state, respectively; wherein the mating stop portion is simulated using a contact unit, the stop is set as a target surface, the radial edge of the first mounting edge is set as a contact surface, and the minimum interference amount data is applied to the mating stop portion; The second analysis module is used to analyze and obtain the minimum torque transmitted by friction at the mating stop part according to the minimum value of the extrusion pressure in the steady state and the extrusion pressure in the transient state, the end surface friction coefficient of the mating stop part, and the turning radius of the mating stop part; The third analysis module is used to determine the sum of the torque transmitted by the friction of the axial end face of the mounting edge and the minimum torque transmitted by the friction of the matching stopper portion as the lower limit of the friction transmission torque of the stopper-connected rotor in a typical state; The judgment module is used to compare the lower limit value of the friction transmission torque of the stop-connected rotor in a typical state with the working torque of the mounting side in a corresponding state. If the lower limit value of the friction transmission torque is greater than the working torque of the mounting side in the corresponding state, the rotor torque transmission capacity meets the design requirements.

7. The stopper-connected rotor friction torque evaluation system according to claim 6, characterized in that: In the first analysis module, the torque transmitted by the axial end face friction of the mounting edge ,in is the bolt hole pitch circle radius, is the axial compression end surface friction coefficient of the first rotor member and the second rotor member, is the effective clamping force of the bolt, is the number of bolts, It is the axial separation load borne by the mounting side when working.

8. The stopper connection rotor friction torque evaluation system according to claim 6, characterized in that: In the interference determination module, the minimum interference in the direction of the stopper radius ,in Design the minimum diameter for the radial edge of the first mounting edge, The maximum radial height designed for the stop.

9. The stopper connection rotor friction torque evaluation system according to claim 6, characterized in that: In the extrusion force analysis module, by setting the stop as the target surface, setting the radial edge of the first mounting edge as the contact surface, applying the minimum interference data at the stop, and using contact unit simulation analysis, the two-dimensional rotor finite element stress distribution in the steady state and transient state of the typical state is obtained respectively; According to the finite element stress distribution of the two-dimensional rotor under the corresponding state, the support reaction force results of each node within the rotor fitting length under each state are extracted respectively. By summing the support reaction forces of all nodes of the fitting, the extrusion pressure of the fitting under steady state and transient state are obtained respectively.

10. The stopper connection rotor friction torque evaluation system according to claim 6, characterized in that: In the second analysis module, the minimum torque transmitted by friction at the stopper ,in To match the friction coefficient of the end surface of the stopper, is the minimum value of the extrusion pressure in the steady state and the extrusion pressure in the transient state, To match the turning radius of the stop part.

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