A dynamic imbalance calculation method and system

Abstract

The present invention discloses a dynamic imbalance calculation method and system, which relate to the field of transmission systems and are used to calculate the dynamic imbalance value of a transmission system. The transmission system includes a plurality of rotating parts. The dynamic imbalance calculation method includes the following steps: obtaining design parameters of each rotating part, and calculating the dynamic imbalance value of the rotating part based on the design parameters; obtaining assembly data of an assembly in which any two rotating parts are assembled adjacent to each other, and calculating the dynamic imbalance value of the assembly based on the assembly data; establishing an overall dynamic imbalance calculation model based on the dynamic imbalance values ​​of the rotating parts and the dynamic imbalance values ​​of the assembly; and calculating the overall dynamic imbalance value of the transmission system based on the dynamic imbalance calculation model. The present invention can solve the technical problems in the prior art of being unable to effectively and conveniently solve the vibration noise and reliability problems caused by dynamic imbalance.

Description

Technical Field

[0001] The present invention relates to the field of transmission systems, and in particular to a dynamic imbalance calculation method and system. Background Art

[0002] With consumers increasingly concerned about noise and vibration generated by automotive drivetrains, developing higher-performance drivetrains is a must for manufacturers. The drivetrain is the core system of a vehicle, responsible for power output and torque transmission. It primarily consists of rotating components and drive shafts. However, due to cost, cycle time, processing technology, and inherent equipment uncertainties, dynamic imbalance and dimensional deviations can occur between rotating components and drive shafts in the drivetrain. This causes the center of mass of the drivetrain to deviate from the axis of rotation during rotation, generating centrifugal forces that cause noise and vibration, and even lead to reliability issues. Therefore, computational research into the distribution of dynamic imbalance in the drivetrain is of paramount importance.

[0003] Currently, the more common dynamic imbalance test methods are the drive shaft dynamic imbalance and transmission system dynamic balance test methods. On the one hand, this method requires the installation of test components for testing, which is only suitable for the test verification and control of a single sample, and is very difficult to test and control a large number of samples of the transmission system. On the other hand, this method mainly considers the dynamic imbalance of the component itself, and completely ignores the important factor of dynamic imbalance caused by dimensional deviation and assembly deviation of the component, which causes noise and vibration in the transmission system.

[0004] Therefore, existing dynamic imbalance test methods generally have the problem of being unable to effectively and conveniently solve the technical problems of vibration noise and reliability caused by dynamic imbalance. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a dynamic imbalance calculation method and system, aiming to solve the technical problems of the existing technology that cannot effectively and conveniently solve the vibration noise and reliability caused by dynamic imbalance.

[0006] One aspect of the present invention is to provide a dynamic imbalance calculation method for calculating the dynamic imbalance value of a transmission system, wherein the transmission system includes a plurality of rotating components, and the dynamic imbalance calculation method includes:

[0007] Obtaining design parameters of each rotating component, and obtaining a self-dynamic unbalance value of the rotating component based on the design parameters;

[0008] Obtaining design parameters of each rotating component, and calculating the self-dynamic unbalance value of the rotating component based on the design parameters;

[0009] Acquiring assembly data of an assembly body in which any two rotating parts are assembled adjacent to each other, and calculating a dynamic unbalance value of the assembly body based on the assembly data;

[0010] Establishing an overall dynamic imbalance calculation model according to the dynamic imbalance value of the rotating component itself and the dynamic imbalance value of the assembly;

[0011] Based on the dynamic imbalance calculation model, an overall dynamic imbalance value of the transmission system is calculated.

[0012] Compared with the prior art, the beneficial effects of the present invention are: through the dynamic imbalance calculation method provided by the present invention, the dynamic imbalance value caused by the deviation in the assembly connection process is taken into consideration for analysis of assembly data, breaking through the traditional method of only considering the dynamic imbalance of the component itself, and more accurately obtaining the dynamic imbalance of the transmission system; at the same time, the calculation method is simpler and easier to control than installing test components for testing, thereby effectively and conveniently solving the technical problems of vibration noise and reliability caused by dynamic imbalance in the prior art that cannot be effectively and conveniently solved.

[0013] According to one aspect of the above technical solution, the steps of obtaining design parameters of each rotating component and calculating the self-dynamic unbalance value of the rotating component based on the design parameters specifically include:

[0014] Obtain the dynamic unbalance coefficient r of the rotating component due to model type differences ij ;

[0015] Determine the reference point of the rotating component, and obtain the design angle deviation value θ of the rotating component based on the reference point ij ;

[0016] According to the dynamic unbalance coefficient r ij Deviation from the design angle θ ij , calculate the self-dynamic unbalance value Im of the rotating component ij , Im ij =r ij (θ ij ), r ij ≤R ij ;

[0017] Among them, R ij is the maximum value of the dynamic unbalance coefficient of the rotating component.

[0018] According to one aspect of the above technical solution, the assembly of any two adjacent rotating components includes a rotating component i and a rotating component i+1.

[0019] According to one aspect of the above technical solution, the step of obtaining assembly data of an assembly in which any two rotating parts are assembled adjacent to each other and calculating the dynamic unbalance value of the assembly based on the assembly data specifically includes:

[0020] Get the diameter D of the rotating component i i ;

[0021] According to the position of the preset center of mass of the rotating component i, the distance da of the axial direction of the center of mass of the rotating component deviating from the preset center of mass is obtained. i and the distance dc from the preset center of mass in the radial direction i ;

[0022] By obtaining the axis position of the connection between the rotating component i and the rotating component i+1, the deviation distance dr between the axis of the rotating component i and the axis of the rotating component i+1 is calculated. i ;

[0023] Get the dynamic unbalance calculation point and participating mass m of the rotating component i+1 i+1 , calculate the distance L from the connection between the rotating component i and the rotating component i+1 to the dynamic unbalance calculation point;

[0024] Acquire the dynamic unbalance value Aim of the assembly based on the assembly data (i,i+1)j ,

[0025]

[0026] According to one aspect of the above technical solution, the method further includes:

[0027] Obtain the measurement position points of the rotating component i+1 according to actual engineering requirements and standards, and calibrate the dynamic imbalance calculation points;

[0028] The connection between the rotating component i and the rotating component i+1 is used as a fulcrum, and the participating mass m of the rotating component i+1 is calculated according to the torque. i+1 .

[0029] According to one aspect of the above technical solution, the step of establishing an overall dynamic imbalance calculation model based on the dynamic imbalance value of the rotating component itself and the dynamic imbalance value of the assembly specifically includes:

[0030] Obtain the self-dynamic unbalance value Im of the rotating component ij , Im ij =r ij (θ ij ), r i ≤R i ;

[0031] Get the dynamic imbalance value Aim of the assembly (i,i+1)j ,

[0032]

[0033] Based on the dynamic imbalance value of the rotating component itself and the dynamic imbalance value of the assembly, an overall dynamic imbalance calculation model is established.

[0034]

[0035] According to one aspect of the above technical solution, the step of calculating the overall dynamic imbalance value of the transmission system based on the dynamic imbalance calculation model specifically includes:

[0036] According to the design parameters and the assembly data, the dynamic imbalance is calculated using the dynamic imbalance calculation model to obtain an overall dynamic imbalance value of the transmission system.

[0037] According to one aspect of the above technical solution, the method includes:

[0038] The dynamic imbalance set of the transmission system under the preset sample is obtained by random sampling calculation, and the probability distribution result of the overall dynamic imbalance under the preset sample is obtained.

[0039] A dynamic unbalance calculation system, characterized in that the system comprises:

[0040] a first calculation module, configured to obtain design parameters of each rotating component and calculate a self-dynamic unbalance value of the rotating component based on the design parameters;

[0041] a second calculation module, configured to obtain assembly data of an assembly body in which any two rotating parts are assembled adjacent to each other, and calculate a dynamic unbalance value of the assembly body based on the assembly data;

[0042] A model building module, configured to build an overall dynamic imbalance calculation model based on the dynamic imbalance value of the rotating component itself and the dynamic imbalance value of the assembly;

[0043] The third calculation module is configured to calculate an overall dynamic imbalance value of the transmission system based on the dynamic imbalance calculation model. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0045] Figure 1 Flowchart of the method for calculating dynamic imbalance in the first embodiment of the present invention;

[0046] Figure 2 Flowchart of a method for calculating dynamic imbalance in a second embodiment of the present invention;

[0047] Figure 3This is a statistical calculation distribution diagram of the dynamic imbalance of the reducer of the new energy power transmission system in the second embodiment of the present invention;

[0048] Figure 4 This is a statistical calculation distribution diagram of the dynamic imbalance of the output flange of the new energy power transmission system in the second embodiment of the present invention;

[0049] Figure 5 This is a statistical calculation distribution diagram of the dynamic imbalance of the transmission shaft of the new energy power transmission system in the second embodiment of the present invention;

[0050] Figure 6 A distribution diagram of dynamic imbalance statistics calculation of an assembly of a new energy power transmission system according to a second embodiment of the present invention;

[0051] Figure 7 This is a statistical calculation distribution diagram of the overall dynamic imbalance of the new energy power transmission system in the second embodiment of the present invention;

[0052] Figure 8 This is a structural block diagram of a dynamic unbalance calculation system in a third embodiment of the present invention;

[0053] Component symbol description:

[0054] A first calculation module 100 , a second calculation module 200 , a model building module 300 , and a third calculation module 400 . DETAILED DESCRIPTION

[0055] To make the objectives, features, and advantages of the present invention more readily apparent, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The accompanying drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0056] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions used herein are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," and the like should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0058] Example 1

[0059] See also Figure 1 , which shows a method for calculating dynamic imbalance provided by the first embodiment of the present invention, the method comprises the following steps:

[0060] Step S10, obtaining design parameters of each rotating component, and calculating the self-dynamic unbalance value of the rotating component based on the design parameters;

[0061] Among them, the design parameters of each rotating component include the dynamic unbalance coefficient r ij And the design angle deviation value θ ij Specifically, obtain the dynamic unbalance coefficient r generated by the model type difference of the rotating parts ij Since each rotating part has the deviation of process and material unevenness, the dynamic unbalance coefficient r of each rotating part is ij are all different, but the dynamic unbalance coefficient r of each rotating part is ij All need to meet a condition, the dynamic unbalance coefficient r of each rotating part ij The maximum value of the dynamic unbalance coefficient R of the rotating parts shall not be exceeded ij Otherwise, the specifications of the rotating parts do not meet the product engineering requirements, i.e. ij ≤R ij ;

[0062] In addition, the rotating component needs to determine a reference point. The position of the reference point defined by different types of rotating components is different. The deviation of the rotating component's own process and material non-uniformity causes the actual center of mass position to be inconsistent with the preset center of mass position. The angle formed by the actual center of mass position through the reference point and the preset center of mass position is the design angle deviation value θ ij ;

[0063] According to the dynamic unbalance coefficient r of the rotating parts ij And the design angle deviation value θ ij Calculate the dynamic imbalance value Im of the rotating part ij , Im ij =rij (θ ij ), r ij ≤R ij .

[0064] In summary, the inherent dynamic imbalance value of the rotating component can be obtained by simple calculation by obtaining the design parameters. There is no need to install test components to test the rotating components one by one. The method is simple and has low control difficulty.

[0065] Step S11, obtaining assembly data of an assembly body in which any two rotating parts are assembled adjacent to each other, and calculating a dynamic unbalance value of the assembly body based on the assembly data;

[0066] The assembly of any two adjacent rotating parts includes rotating part i and rotating part i+1, specifically,

[0067] Get the diameter D of the rotating component i i ;

[0068] The deviation of the rotating component's actual center of mass position from the preset center of mass position due to the deviation of its own process and material uniformity leads to inconsistency between the actual center of mass position of the rotating component and the preset center of mass position. Based on the preset center of mass position of the rotating component i, the axial deviation distance da between the actual center of mass position of the rotating component and the preset center of mass position is obtained. i and the distance dc from the preset center of mass in the radial direction i ;

[0069] Rotating component i and rotating component i+1 are assembled and connected to form an assembly. Based on the axis position of rotating component i at the connection and the axis position of rotating component i+1 at the connection, the deviation distance dr between the axis position of rotating component i at the connection and the axis position of rotating component i+1 at the connection is obtained. i ;

[0070] Obtaining measurement position points of the rotating component i+1 according to actual engineering requirements and standards, calibrating the dynamic unbalance calculation point. The locations of the dynamic unbalance calculation points selected for different assemblies vary due to actual engineering requirements. Based on the dynamic unbalance calculation point, measure the distance L from the connection between the rotating component i and the rotating component i+1 to the dynamic unbalance point;

[0071] Based on the connection point between rotating component i and rotating component i+1 as the fulcrum, obtain the distance l from rotating component i to the fulcrum i and the distance l from the rotating part i+1 to the fulcrum i+1 , according to the torque calculation formula m i *l i =m i+1 l i+1 , calculate the participating mass m of the rotating component i+1 i+1 ;

[0072] Calculate the dynamic imbalance value Aim of the assembly based on the above assembly data (i,i+1)j ,

[0073]

[0074] In summary, calculating and evaluating the dynamic imbalance value of an assembly based on assembly data effectively breaks the traditional idea of ​​only considering the dynamic imbalance of rotating parts themselves, and more accurately calculates the dynamic imbalance value of the assembly. The calculation method is simpler and easier to control than installing test parts for testing, thus effectively and conveniently solving the technical problems of vibration noise and reliability caused by dynamic imbalance in the existing technology that cannot be effectively and conveniently solved.

[0075] Step S12, establishing an overall dynamic imbalance calculation model based on the dynamic imbalance value of the rotating component itself and the dynamic imbalance value of the assembly;

[0076] The assembly of any two adjacent rotating parts includes rotating part i and rotating part i+1, specifically,

[0077] Get the dynamic unbalance coefficient r of the rotating component i ij And the design angle deviation value θ ij , calculate the self-dynamic unbalance value Im of the rotating component i ij , Im ij =r ij (θ ij ), r ij ≤R ij ;

[0078] Get the dynamic unbalance coefficient r of the rotating component i+1 i+1j And the design angle deviation value θ i+1j , calculate the dynamic imbalance value Im of the rotating component i+1 i+1j , Im i+1j =r i+1j (θ i+1j ), r i+1j ≤R i+1j ;

[0079] Obtain the assembly data of any two rotating parts assembled adjacent to each other and calculate the dynamic imbalance value Aim of the assembly (i,i+1)j ,

[0080]

[0081] By measuring the dynamic unbalance value Im of the rotating component i ij Dynamic imbalance value Im with rotating component i+1 i+1j The dynamic imbalance value Aim of the assembly formed by the two (i,i+1)j Sum and establish the overall dynamic imbalance calculation model.

[0082] Right now

[0083]

[0084] Step S13, calculating the overall dynamic imbalance value of the transmission system based on the dynamic imbalance calculation model;

[0085] Among them, the calculation formula based on the dynamic imbalance calculation model is: By obtaining the design parameters and assembly data of rotating component i and rotating component i+1, the overall dynamic imbalance value of the transmission system can be calculated.

[0086] It can be understood that the overall dynamic imbalance value of a transmission system is equivalent to the sum of the inherent dynamic imbalance values ​​of each rotating component in the transmission system and the assembly dynamic imbalance values ​​of all adjacent assemblies of the rotating components. Incorporating the overall dynamic imbalance value of the transmission system into the assembly data analysis generates dynamic imbalance values, breaking away from traditional methods that only consider the dynamic imbalance of the components themselves, and providing a more accurate calculation of the transmission system's dynamic imbalance value. Furthermore, this calculation method is simpler and easier to control than testing with test components, making it a convenient and effective way to calculate the overall dynamic imbalance value of the transmission system.

[0087] Compared with the prior art, the dynamic imbalance calculation method provided in this embodiment has the following beneficial effects: through the dynamic imbalance calculation method provided by the present invention, the dynamic imbalance value caused by the deviation in the assembly connection process is taken into consideration for analysis of assembly data, breaking through the traditional method of only considering the dynamic imbalance of the component itself, and more accurately obtaining the dynamic imbalance value of the transmission system; at the same time, the calculation method is simpler and easier to control than installing test components for testing, thereby effectively and conveniently solving the technical problems of vibration noise and reliability caused by dynamic imbalance in the prior art that cannot be effectively and conveniently solved.

[0088] Example 2

[0089] See also Figure 2 , which shows a method for calculating dynamic imbalance in a second embodiment of the present invention, and includes the following steps:

[0090] Step S20, obtaining design parameters of each rotating component, and calculating the self-dynamic unbalance value of the rotating component based on the design parameters;

[0091] Step S21, obtaining assembly data of an assembly body in which any two rotating parts are assembled adjacent to each other, and calculating a dynamic unbalance value of the assembly body based on the assembly data;

[0092] Step S22, establishing an overall dynamic imbalance calculation model based on the dynamic imbalance value of the rotating component itself and the dynamic imbalance value of the assembly;

[0093] Step S23: Calculate the overall dynamic imbalance value of the transmission system based on the dynamic imbalance calculation model.

[0094] Step S24 , obtaining a dynamic imbalance set of the transmission system under a preset sample by random sampling calculation, and obtaining a probability distribution result of the overall dynamic imbalance under the preset sample.

[0095] Among them, in actual engineering, the transmission system samples are a large number of samples, so the random sampling statistical method can be used to analyze the dynamic imbalance of the transmission system, that is, the dynamic imbalance value of the transmission system under the preset sample is obtained by random sampling calculation, and the dynamic imbalance value of the transmission system under the preset sample is statistically analyzed to form a dynamic imbalance set, which effectively evaluates the distribution of the dynamic imbalance value of the transmission system under the preset sample, that is, the dynamic imbalance load distribution, so that the overall dynamic imbalance level of the transmission system can be detected.

[0096] To facilitate understanding of the dynamic imbalance calculation method in the second embodiment of the present invention, a new energy power transmission system is taken as an example in this embodiment. The new energy power transmission system includes a reducer, an output flange, and a transmission shaft.

[0097] See also Figure 3-5 , shown is the distribution of the dynamic imbalance values ​​of the reducer, output flange and drive shaft under the preset samples. According to the engineering design drawing, the dynamic imbalance value of the reducer itself is ≤60g-cm, the dynamic imbalance value of the flange is ≤20g-cm, and the dynamic imbalance value of the drive shaft is ≤20g-cm. Therefore, the dynamic imbalance values ​​of the reducer, output flange and drive shaft under 20,000 samples are randomly sampled and calculated. The distribution of the dynamic imbalance values ​​of the reducer, output flange and drive shaft is statistically analyzed, thereby calculating the probability distribution of the reducer, output flange and drive shaft components that do not meet the engineering design.

[0098] See also Figure 6 , shown is the distribution of assembly dynamic imbalance of the assembly formed by the reducer and output flange, and the assembly formed by the drive shaft and output flange under the preset sample. According to the engineering design drawing, the maximum dynamic imbalance caused by assembly deviation is 107.25g-cm. Therefore, the assembly dynamic imbalance values ​​of the assembly formed by the reducer and output flange, and the assembly formed by the drive shaft and output flange, under 20,000 samples were randomly sampled and calculated. The distribution of the assembly dynamic imbalance values ​​of the assembly formed by the reducer and output flange, and the assembly formed by the drive shaft and output flange, were statistically analyzed, thereby calculating the probability distribution of the components of the assembly formed by the reducer and output flange, and the assembly formed by the drive shaft and output flange that do not meet the engineering design.

[0099] See also Figure 7The figure shows the overall dynamic imbalance distribution of new energy powertrain systems. The overall dynamic imbalance value of a new energy powertrain system is composed of the dynamic imbalance values ​​of the reducer, the output flange, the drive shaft, and the assembly. The overall dynamic imbalance distribution of new energy powertrain systems was calculated using random sampling for 20,000 samples. This effectively evaluates the load distribution of the dynamic imbalance values ​​of new energy powertrain systems across 20,000 samples, thereby enabling the dynamic imbalance level of new energy powertrain systems to be detected.

[0100] Example 3

[0101] See also Figure 8 , shown is a dynamic unbalance calculation system proposed in the third embodiment of the present invention, and the dynamic unbalance calculation system applies the steps of the method described in any one of the above embodiments 1 to 2.

[0102] The dynamic unbalance calculation system includes:

[0103] a first calculation module, configured to obtain design parameters of each rotating component and calculate a self-dynamic unbalance value of the rotating component based on the design parameters;

[0104] The dynamic unbalance value of the rotating component itself is calculated based on the dynamic unbalance coefficient of the rotating component and the design angle deviation value.

[0105] a second calculation module, configured to obtain assembly data of an assembly body in which any two rotating parts are assembled adjacent to each other, and calculate a dynamic unbalance value of the assembly body based on the assembly data;

[0106] Among them, based on the assembly data of the assembly, the diameter, axial deviation distance, radial deviation distance, aperture deviation distance, participating mass and the distance from the connection point to the dynamic imbalance calculation point of the rotating part, the dynamic imbalance value of the assembly formed by the connection deviation of two adjacent rotating parts is calculated.

[0107] A model building module, configured to build an overall dynamic imbalance calculation model based on the dynamic imbalance value of the rotating component itself and the dynamic imbalance value of the assembly;

[0108] The model building module is composed of a first calculation module and a second calculation module, that is, the overall dynamic unbalance calculation template is an assembly of the dynamic unbalance value of the rotating component itself and the dynamic unbalance value of the assembly.

[0109] The third calculation module is configured to calculate an overall dynamic imbalance value of the transmission system based on the dynamic imbalance calculation model.

[0110] Among them, the dynamic imbalance is calculated by the dynamic imbalance calculation model, and the overall dynamic imbalance value of the transmission system is obtained based on the design parameters and assembly data. In summary, the dynamic imbalance calculation system in the above embodiment of the present invention establishes an overall dynamic imbalance calculation model through the first calculation module and the second calculation module, and calculates the overall dynamic imbalance value of the transmission system, avoiding the need to install test components for testing. The dynamic imbalance value test and control algorithm of the transmission system are simple and effective. At the same time, the dynamic imbalance value generated by the assembly connection deviation is incorporated into the second calculation module, and the overall dynamic imbalance value is calculated more accurately and effectively, thereby effectively and conveniently solving the technical problems of vibration noise and reliability caused by dynamic imbalance in the existing technology.

[0111] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0112] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for calculating dynamic imbalance, for calculating the dynamic imbalance value of a transmission system, characterized in that: The transmission system includes several rotating components, and the method includes: Obtaining design parameters of each rotating component and calculating the self-dynamic unbalance value of the rotating component based on the design parameters, including: Obtain the dynamic unbalance coefficient r of the rotating component due to model type differences ij , Determine a reference point of the rotating component, and obtain a design angle deviation value θ of the rotating component based on the reference point ij , According to the dynamic unbalance coefficient r ij Deviation from the design angle θ ij , calculate the self-dynamic unbalance value Im of the rotating component ij , Im ij =r ij (θ ij ), r ij ≤R ij , Among them, R ij is the maximum value of the dynamic unbalance coefficient of the rotating component; Acquiring assembly data of an assembly in which any two rotating parts are adjacently assembled, and calculating a dynamic unbalance value of the assembly based on the assembly data, including: The assembly of any two adjacent rotating parts includes rotating part i and rotating part i+1, and the diameter D of the rotating part i is obtained. i , According to the position of the preset center of mass of the rotating component i, the distance da of the axial deviation of the center of mass of the rotating component i+1 from the preset center of mass of the rotating component i is obtained. i and a distance dc in the radial direction from the preset center of mass of the rotating component i i , By obtaining the axis position of the connection between the rotating component i and the rotating component i+1, the deviation distance dr between the axis of the rotating component i and the axis of the rotating component i+1 is calculated. i , Get the dynamic unbalance calculation point and participating mass m of the rotating component i+1 i+1 , calculate the distance L from the connection between the rotating component i and the rotating component i+1 to the dynamic unbalance calculation point, Acquire the dynamic unbalance value Aim of the assembly based on the assembly data (i,i+1)j , Establishing an overall dynamic imbalance calculation model according to the dynamic imbalance value of the rotating component itself and the dynamic imbalance value of the assembly; Based on the dynamic imbalance calculation model, an overall dynamic imbalance value of the transmission system is calculated.

2. The dynamic imbalance calculation method according to claim 1, characterized in that: The method further comprises: Obtain the measurement position points of the rotating component i+1 according to actual engineering requirements and standards, and calibrate the dynamic imbalance calculation points; The connection between the rotating component i and the rotating component i+1 is used as a fulcrum, and the participating mass m of the rotating component i+1 is calculated according to the torque. i+1 .

3. The dynamic imbalance calculation method according to claim 2, characterized in that: The step of establishing an overall dynamic imbalance calculation model according to the dynamic imbalance value of the rotating component itself and the dynamic imbalance value of the assembly specifically includes:

4. The dynamic imbalance calculation method according to claim 3, characterized in that: The step of calculating the overall dynamic imbalance value of the transmission system based on the dynamic imbalance calculation model specifically includes: According to the design parameters and the assembly data, the dynamic imbalance is calculated using the dynamic imbalance calculation model to obtain an overall dynamic imbalance value of the transmission system.

5. The dynamic imbalance calculation method according to claim 1, characterized in that: The method further comprises: The dynamic imbalance set of the transmission system under the preset sample is obtained by random sampling calculation, and the probability distribution result of the overall dynamic imbalance under the preset sample is obtained.

6. A dynamic unbalance calculation system, characterized in that: The system comprises: The first calculation module is configured to obtain design parameters of each rotating component and calculate the self-dynamic unbalance value of the rotating component based on the design parameters, including: Obtain the dynamic unbalance coefficient r of the rotating component due to model type differences ij , Determine a reference point of the rotating component, and obtain a design angle deviation value θ of the rotating component based on the reference point ij , According to the dynamic unbalance coefficient r ij Deviation from the design angle θ ij , calculate the self-dynamic unbalance value Im of the rotating component ij , Im ij =r ij (θ ij ), r ij ≤R ij , Among them, R ij is the maximum value of the dynamic unbalance coefficient of the rotating component; The second calculation module is configured to obtain assembly data of an assembly in which any two rotating parts are assembled adjacent to each other, and calculate the dynamic unbalance value of the assembly based on the assembly data, including: The assembly of any two adjacent rotating parts includes rotating part i and rotating part i+1, and the diameter D of the rotating part i is obtained. i , According to the position of the preset center of mass of the rotating component i, the distance da of the axial deviation of the center of mass of the rotating component i+1 from the preset center of mass of the rotating component i is obtained. i and a distance dc in the radial direction from the preset center of mass of the rotating component i i , By obtaining the axis position of the connection between the rotating component i and the rotating component i+1, the deviation distance dr between the axis of the rotating component i and the axis of the rotating component i+1 is calculated. i , Get the dynamic unbalance calculation point and participating mass m of the rotating component i+1 i+1 , calculate the distance L from the connection between the rotating component i and the rotating component i+1 to the dynamic unbalance calculation point, Acquire the dynamic unbalance value Aim of the assembly based on the assembly data (i,i+1)j , A model building module, configured to build an overall dynamic imbalance calculation model based on the dynamic imbalance value of the rotating component itself and the dynamic imbalance value of the assembly; The third calculation module is used to calculate the overall dynamic imbalance value of the transmission system based on the dynamic imbalance calculation model.

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