Vibration working condition abrasion calculation method for rotary mechanical seal
By establishing a physical model and dynamic analysis of rotary mechanical seals, using equivalent fatigue damage theory and Archard wear theory, the wear amount of rotary mechanical seal static ring is calculated, which solves the problem of low accuracy of the existing methods and improves calculation accuracy and industrial efficiency.
Patent Information
- Application Number
- CN202411965159.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-04-25
AI Technical Summary
When calculating the vibration wear of rotary mechanical seals, existing methods rely on engineering experience or direct product testing, lack of theoretical analysis, resulting in low accuracy.
By establishing a physical model of rotating mechanical seal, performing dynamic analysis, using the equivalent fatigue damage theory to equivalent random vibration excitation to sinusoidal vibration excitation, combined with Archard wear theory, the wear amount of the static ring is calculated.
The calculation accuracy of the wear amount of rotary mechanical seal vibration conditions has been improved, innovative development in this field has been promoted, production costs have been reduced, and efficiency has been improved.
Smart Images
Figure CN119885634A_ABST
Abstract
Description
Technical Field
[0001] This document relates to the field of mechanical seals, and in particular to a method for calculating the wear of rotating mechanical seals under vibration conditions. Background Art
[0002] Rotary mechanical seals are widely used, especially in the airborne field. The vibration factor in the airborne environment directly affects the life of the rotary mechanical seal. How to obtain the wear amount of the rotary mechanical seal under vibration excitation is a difficult problem that needs to be solved urgently. At present, the wear amount results are given only by relying on engineering experience or direct product testing, and there is a lack of theoretical analysis methods.
[0003] Therefore, a method for calculating the wear amount of rotating mechanical seals under vibration excitation is urgently needed to solve the problem that the existing methods rely on engineering experience or direct product testing to give wear results, lack theoretical analysis, and have low accuracy. Summary of the invention
[0004] This specification provides a vibration wear calculation method for rotating mechanical seals, which is used to solve the problem that the existing methods rely on engineering experience or direct product testing to give wear results, lack theoretical analysis, and have low accuracy.
[0005] In a first aspect, this specification provides a vibration wear calculation method for a rotary mechanical seal, comprising:
[0006] According to the composition and structure of rotary mechanical seal, establish the physical model of rotary mechanical seal and determine the main wear parts;
[0007] Conduct dynamic analysis on the stationary ring of the rotating mechanical seal to determine the closing force and opening force of the stationary ring;
[0008] According to the equivalent fatigue damage theory, the random vibration excitation of the static ring in the rotating mechanical seal is equivalent to sinusoidal vibration excitation; combined with dynamic analysis, a new static ring force balance model is constructed;
[0009] According to Archard's wear theory and the newly constructed static ring force balance model, the wear amount of the static ring is determined.
[0010] In the second aspect, the present specification provides a vibration wear calculation device for a rotary mechanical seal, comprising: a physical model building module, a closing force and opening force determination module, a random vibration excitation equivalent module, and a wear amount calculation module; wherein:
[0011] The physical model building module is used to establish a physical model of the rotary mechanical seal according to the composition structure of the rotary mechanical seal and determine the main wear parts;
[0012] The closing force and opening force determination module is used to perform dynamic analysis on the static ring of the rotary mechanical seal to determine the closing force and opening force of the static ring;
[0013] The random vibration excitation equivalent module is used to convert the random vibration excitation of the stationary ring in the rotating mechanical seal into sinusoidal vibration excitation according to the equivalent fatigue damage theory; and to construct a new stationary ring force balance model in combination with dynamic analysis;
[0014] The wear amount calculation module is used to determine the wear amount of the stationary ring according to Archard wear theory in combination with the newly constructed stationary ring force balance model.
[0015] In a third aspect, this specification also provides an electronic device, including: a communication interface, a processor, and a memory;
[0016] The processor calls the program instructions in the memory to perform the following actions:
[0017] According to the composition and structure of rotary mechanical seal, establish the physical model of rotary mechanical seal and determine the main wear parts;
[0018] Conduct dynamic analysis on the stationary ring of the rotating mechanical seal to determine the closing force and opening force of the stationary ring;
[0019] According to the equivalent fatigue damage theory, the random vibration excitation of the static ring in the rotating mechanical seal is equivalent to sinusoidal vibration excitation; combined with dynamic analysis, a new static ring force balance model is constructed;
[0020] According to Archard's wear theory and the newly constructed static ring force balance model, the wear amount of the static ring is determined.
[0021] The beneficial effects of the present invention are as follows:
[0022] This embodiment provides a method for calculating the vibration wear of a rotary mechanical seal. The method establishes a physical model of the rotary mechanical seal, abstracts the physical model of the rotary mechanical seal into a mass-spring-damper system; performs a dynamic analysis on the static ring of the rotary mechanical seal; performs an equivalent analysis of random vibration excitation and sinusoidal vibration excitation on the static ring of the rotary mechanical seal; and obtains the wear amount of the static ring based on Archard wear. This solves the problem that the existing methods rely on engineering experience or direct product testing to give wear results, lack theoretical analysis, and have low accuracy. This method equates the impact of random vibration excitation to sinusoidal machine vibration excitation, obtains the sealing ring contact force based on dynamic analysis, and finally obtains the distance wear amount. This method helps to promote the innovative development of the rotary mechanical seal industry, improve the efficiency of calculating vibration wear of rotary mechanical seals, and achieve cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The drawings described herein are used to provide a further understanding of this specification and constitute a part of this specification. The illustrative embodiments and descriptions of this specification are used to explain this specification and do not constitute an improper limitation on this specification. In the drawings:
[0024] Figure 1 is a schematic diagram of a vibration wear calculation method for a rotating mechanical seal provided in an embodiment of this specification;
[0025] Figure 2 It is a schematic diagram of an equivalent analysis of random vibration excitation and sinusoidal vibration excitation provided in the embodiments of this specification;
[0026] Figure 3 is a schematic diagram of a vibration wear calculation device for a rotating mechanical seal provided in an embodiment of this specification;
[0027] Figure 4 It is a schematic diagram of an electronic device provided in an embodiment of this specification.
[0028] Reference numerals:
[0029] 1-spring; 2-O-ring; 3-stationary ring; 4-sealed fluid; 5-moving ring; 6-housing; 7-shaft. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solutions and advantages of this specification clearer, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and their corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this document.
[0031] The technical solutions provided by the embodiments of this specification are described in detail below in conjunction with the accompanying drawings. Specific embodiment one:
[0033] This embodiment provides a vibration wear calculation method for a rotary mechanical seal, see Figure 1 ;
[0034] First of all, it should be noted that random vibration excitation is the main vibration factor in the airborne environment, and it is very challenging to directly calculate the wear amount of rotating mechanical seals under random vibration excitation.
[0035] This embodiment establishes an equivalent wear relationship between random vibration excitation and sinusoidal vibration excitation based on the equivalent fatigue damage theory, and can ultimately achieve theoretical calculation of the wear amount based on the size of the input random vibration excitation after equivalent conversion to sinusoidal excitation.
[0036] The method provided in this embodiment specifically includes the following steps:
[0037] Step 102: Establish a physical model of the rotary mechanical seal according to the composition structure of the rotary mechanical seal, and determine the main wear parts;
[0038] The rotating mechanical seal comprises a spring, an O-ring, a stationary ring, a sealed fluid, a dynamic ring, a housing and a shaft.
[0039] The physical model of the rotary mechanical seal is abstracted as a mass-spring-damper system;
[0040] The main wearing part of the rotary mechanical seal is the stationary ring, because the dynamic ring has a very high hardness and is not easy to wear.
[0041] Step 104, performing a dynamic analysis on the static ring of the rotary mechanical seal to determine the closing force and the opening force of the static ring;
[0042] Specifically, one implementation of step 104 may be:
[0043] S41. Dynamic analysis of the static ring of the rotating mechanical seal, mainly including the closing force F cl and opening force F o , under ideal conditions, the two are in a dynamic equilibrium state, that is: F cl +F o =0;
[0044] S42, the closing force F cl Including the pressure of the sealed fluid F p and the spring pressure F s , the closing force is:
[0045]
[0046] Among them, r i and r o Respectively represent the inner radius and outer radius of the moving ring, r b is the equilibrium radius, P o is the pressure of the sealed fluid, P i The pressure of the external environment.
[0047] S43, opening force F o Including the dynamic pressure F of the sealed fluid f Contact force F with sealing ring c, the opening force is:
[0048] F o =F f +F c (2)
[0049] Step 106: According to the equivalent fatigue damage theory, the random vibration excitation of the stationary ring in the rotating mechanical seal is equivalent to the sinusoidal vibration excitation; combined with the dynamic analysis, a new stationary ring force balance model is constructed;
[0050] Specifically, one implementation of step 106 may be:
[0051] S61. Based on the equivalent fatigue damage theory, the stationary ring of the rotating mechanical seal is subjected to equivalent analysis of random vibration excitation and sinusoidal vibration excitation;
[0052] Among them, random vibration excitation is equivalent to sinusoidal vibration excitation A s =A sine sin(2πf n t).
[0053] S62. Combined with dynamic analysis, the additional force F generated by sinusoidal vibration excitation a Acting on the static ring;
[0054] S63. According to the closing force, opening force and additional force generated by sinusoidal vibration excitation, a new static ring force balance model is constructed.
[0055] The new static ring force balance model refers to:
[0056] F cl +F o +F a =0 (3).
[0057] Specific example:
[0058] The dynamic model of the rotary mechanical seal is abstracted as a mass-spring-damper system, where the mass is m, the damping coefficient is C, and the spring stiffness is K. The influence of random vibration excitation is expressed as The influence of vibration excitation of a sine machine is expressed as express, represents the power spectrum density of random vibration excitation acceleration, f n =ω n / 2π represents the natural frequency, ω n Depend on We get, ξ is the damping ratio, from 2ξω n = C / m, the amplification factor Q = 1 / (2ξ), A sine is the amplitude of the sinusoidal vibration.
[0059] See also Figure 2 , according to the equivalent fatigue damage theory, and are equal, so we can get A sine .
[0060] Finally, the random vibration excitation is equivalent to the sinusoidal vibration excitation A s =A sine sin(2πf n t).
[0061] Due to the influence of sinusoidal excitation, the static ring is subjected to an additional force F a (t) = mA s And it is in a new equilibrium state, see formula (3) for details;
[0062] Based on this, a connection is established between random vibration excitation and sinusoidal vibration excitation.
[0063] Step 108: According to Archard's wear theory and in combination with the newly constructed static ring force balance model, the wear amount of the static ring is determined.
[0064] According to Archard wear theory, Here h w Indicates the wear height of the stationary ring, k c is the wear coefficient, which is related to the hardness and material of the stationary ring and can be obtained by referring to relevant manual materials. c is the sealing ring contact force, which can be obtained through the new static ring force balance model, L is the sliding distance, which refers to the linear displacement of the static ring during operation. s Defined as the distance wear, At this time, the distance wear is only the wear coefficient k c Contact force F with sealing ring c The function expression of .
[0065] At this point, a calculation method for vibration wear of rotating mechanical seals has been obtained. This method is a theoretical calculation method with concise expressions and is convenient for engineers to use. It can be applied to the product design stage and the production and development stage to guide engineering practice.
[0066] In summary, this embodiment establishes a physical model of a rotating mechanical seal, abstracts the physical model of the rotating mechanical seal into a mass-spring-damper system; performs a dynamic analysis on the stationary ring of the rotating mechanical seal; performs an equivalent analysis of random vibration excitation and sinusoidal vibration excitation on the stationary ring of the rotating mechanical seal; and obtains the wear amount of the stationary ring based on Archard wear. This solves the problem that the existing methods rely on engineering experience or direct product testing to give wear results, lack theoretical analysis, and have low accuracy. This method equates the impact of random vibration excitation to sinusoidal machine vibration excitation, obtains the sealing ring contact force based on dynamic analysis, and finally obtains the distance wear amount. Specific embodiment 2:
[0068] This embodiment provides a vibration condition equivalent wear analysis method for a rotary mechanical seal, which specifically includes the following specific steps:
[0069] The first step is to establish a physical model of rotating mechanical seals;
[0070] The dynamic model of the rotary mechanical seal is abstracted as a mass-spring-damper system. The components of the rotary mechanical seal include: spring, O-ring, static ring, sealed fluid, dynamic ring, housing and shaft. The inner radius and outer radius of the dynamic ring are r i and r o , r b is the equilibrium radius, the rotation speed of the shaft is n. The pressure of the sealed fluid is P o , the pressure of the external environment is P i According to the actual situation of materials and industry, wear mainly occurs in the static ring, because the dynamic ring is very hard and not easy to wear.
[0071] Step 2: Dynamic analysis of rotating mechanical seals;
[0072] Dynamic analysis of the static ring of the rotating mechanical seal, mainly including the closing force F cl and opening force F o , the two are in a dynamic equilibrium state, that is: F cl +F o =0;
[0073] Closing force F cl Including the pressure of the sealed fluid F p and the spring pressure F s , the closing force is calculated as:
[0074]
[0075] Opening force F o Including the dynamic pressure F of the sealed fluid f Contact force F with sealing ring c , the calculation of the opening force is:
[0076] F o =F f +F c (2)
[0077] Step 3: Equivalent analysis of random vibration excitation and sinusoidal vibration excitation;
[0078] The equivalent analysis of random vibration excitation and sinusoidal vibration excitation is carried out on the stationary ring of the rotating mechanical seal.
[0079] In the first step, the dynamic model of the rotating mechanical seal is abstracted as a mass-spring-damper system, with mass m, damping coefficient C, and spring stiffness K. The influence of random vibration excitation is expressed as The influence of vibration excitation of a sine machine is expressed as express, represents the power spectrum density of random vibration excitation acceleration, f n =ω n / 2π represents the natural frequency, ω n Depend on We get, ξ is the damping ratio, from 2ξω n = C / m, the amplification factor Q = 1 / (2ξ), A sine is the amplitude of the sinusoidal vibration.
[0080] According to the equivalent fatigue damage theory [1] , and are equal, so we can get A sine .
[0081] Finally, the random vibration excitation is equivalent to the sinusoidal vibration excitation A s =A sine sin(2πf n t).
[0082] Due to the influence of sinusoidal excitation, the static ring is subjected to an additional force F a (t) = mA s And in the new equilibrium state, the following equation is satisfied:
[0083] F cl +F o +F a =0 (3)
[0084] Step 4: Calculate the amount of wear;
[0085] According to Archard wear theory, the wear amount Here h w Indicates the wear height of the stationary ring, k c is the wear coefficient, which is related to the hardness of the stationary ring.c is the contact force of the sealing ring, and L is the sliding distance. s Defined as the distance wear,
[0086] In summary, this embodiment establishes a physical model of a rotating mechanical seal, abstracts the physical model of the rotating mechanical seal into a mass-spring-damper system; performs a dynamic analysis on the stationary ring of the rotating mechanical seal; performs an equivalent analysis of random vibration excitation and sinusoidal vibration excitation on the stationary ring of the rotating mechanical seal; and obtains the wear amount of the stationary ring based on Archard wear. This solves the problem that the existing methods rely on engineering experience or direct product testing to give wear results, lack theoretical analysis, and have low accuracy. This method equates the impact of random vibration excitation to sinusoidal machine vibration excitation, obtains the sealing ring contact force based on dynamic analysis, and finally obtains the distance wear amount. Specific embodiment three:
[0088] This manual provides a vibration wear calculation device for rotating mechanical seals, see Figure 3 , including: a physical model building module 301, a closing force and opening force determination module 302, a random vibration excitation equivalent module 303, and a wear amount calculation module 304; wherein:
[0089] The physical model building module 301 is used to build a physical model of the rotary mechanical seal according to the composition structure of the rotary mechanical seal and determine the main wear parts;
[0090] The closing force and opening force determination module 302 is used to perform dynamic analysis on the static ring of the rotary mechanical seal to determine the closing force and opening force of the static ring;
[0091] The random vibration excitation equivalent module 303 is used to convert the random vibration excitation of the stationary ring in the rotating mechanical seal into sinusoidal vibration excitation according to the equivalent fatigue damage theory; and to construct a new stationary ring force balance model in combination with dynamic analysis;
[0092] The wear amount calculation module 304 is used to determine the wear amount of the stationary ring according to Archard wear theory in combination with the newly constructed stationary ring force balance model.
[0093] Optionally, the composition structure of the rotary mechanical seal includes: a spring, an O-ring, a stationary ring, a sealed fluid, a dynamic ring, a housing and a shaft;
[0094] The physical model of the rotary mechanical seal is abstracted as a mass-spring-damper system;
[0095] The main wearing part of the rotary mechanical seal is the stationary ring.
[0096] Optionally, the closing force Fcl Including the pressure of the sealed fluid F p and the spring pressure F s , the closing force is:
[0097]
[0098] Among them, r i and r o Respectively represent the inner radius and outer radius of the moving ring, r b is the equilibrium radius, P o is the pressure of the sealed fluid, P i The pressure of the external environment.
[0099] Optional, opening force F o Including the dynamic pressure F of the sealed fluid f Contact force F with sealing ring c , the opening force is:
[0100] F o =F f +F c (2).
[0101] Optionally, according to the equivalent fatigue damage theory, the random vibration excitation of the stationary ring in the rotating mechanical seal is equivalent to the sinusoidal vibration excitation; combined with the dynamic analysis, a new stationary ring force balance model is constructed, including:
[0102] According to the equivalent fatigue damage theory, the stationary ring of the rotating mechanical seal is subjected to equivalent analysis of random vibration excitation and sinusoidal vibration excitation;
[0103] Combined with the dynamic analysis, the additional force generated by the sinusoidal vibration excitation acts on the static ring;
[0104] According to the closing force, the opening force and the additional force generated by the sinusoidal vibration excitation, a new static ring force balance model is constructed. Optionally, the new static ring force balance model refers to:
[0105] F cl +F o +F a =0 (3).
[0106] Optionally, random vibration excitation is equivalent to sinusoidal vibration excitation A s =A sine sin(2πf n t).
[0107] Optional, distance wear k of stationary ring s ,for
[0108] where h wIndicates the wear height and wear amount of the stationary ring. k c is the wear coefficient, which is related to the hardness of the stationary ring. c is the sealing ring contact force, and L is the sliding distance.
[0109] In summary, this embodiment establishes a physical model of a rotating mechanical seal, abstracts the physical model of the rotating mechanical seal into a mass-spring-damper system; performs a dynamic analysis on the stationary ring of the rotating mechanical seal; performs an equivalent analysis of random vibration excitation and sinusoidal vibration excitation on the stationary ring of the rotating mechanical seal; and obtains the wear amount of the stationary ring based on Archard wear. This solves the problem that the existing methods rely on engineering experience or direct product testing to give wear results, lack theoretical analysis, and have low accuracy. This method equates the impact of random vibration excitation to sinusoidal machine vibration excitation, obtains the sealing ring contact force based on dynamic analysis, and finally obtains the distance wear amount. Specific embodiment four:
[0111] This manual also provides an electronic device, see Figure 4 , the electronic device can implement the details of the method described in the above embodiment and achieve the same effect. Figure 4 As shown, the electronic device 400 includes: a processor 401, a transceiver 402, a memory 403, a user interface 404 and a bus interface, wherein:
[0112] In the embodiment of this specification, the electronic device 400 further includes: a computer program stored in the memory 403 and executable by the processor 401, and the computer program is executed by the processor 401 to implement the following steps:
[0113] According to the composition and structure of rotary mechanical seal, establish the physical model of rotary mechanical seal and determine the main wear parts;
[0114] Conduct dynamic analysis on the stationary ring of the rotating mechanical seal to determine the closing force and opening force of the stationary ring;
[0115] According to the equivalent fatigue damage theory, the random vibration excitation of the static ring in the rotating mechanical seal is equivalent to sinusoidal vibration excitation; combined with dynamic analysis, a new static ring force balance model is constructed;
[0116] According to Archard's wear theory and the newly constructed static ring force balance model, the wear amount of the static ring is determined.
[0117] exist Figure 4In the embodiment, the bus framework may include any number of interconnected buses and bridges, specifically linking together various circuits of one or more processors represented by processor 401 and memory represented by memory 403. The bus framework may also link together various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described in this document. The bus interface provides an interface. The transceiver 402 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium. For different user devices, the user interface 404 may also be an interface capable of externally and internally connecting required devices, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
[0118] The processor 401 manages the bus architecture and the usual processing, and the memory 403 can store data used by the processor 401 when performing operations. Optionally, when the computer program is executed by the processor 401, the following steps can also be implemented:
[0119] Optionally, the composition structure of the rotary mechanical seal includes: a spring, an O-ring, a stationary ring, a sealed fluid, a dynamic ring, a housing and a shaft;
[0120] The physical model of the rotary mechanical seal is abstracted as a mass-spring-damper system;
[0121] The main wearing part of the rotary mechanical seal is the stationary ring.
[0122] Optionally, the closing force F cl Including the pressure of the sealed fluid F p and the spring pressure F s , the closing force is:
[0123]
[0124] Among them, r i and r o Respectively represent the inner radius and outer radius of the moving ring, r b is the equilibrium radius, P o is the pressure of the sealed fluid, P i The pressure of the external environment.
[0125] Optional, opening force F o Including the dynamic pressure F of the sealed fluid f Contact force F with sealing ring c , the opening force is:
[0126] F o =F f +F c (2).
[0127] Optionally, the random vibration excitation equivalent module 303 is specifically used for:
[0128] According to the equivalent fatigue damage theory, the stationary ring of the rotating mechanical seal is subjected to equivalent analysis of random vibration excitation and sinusoidal vibration excitation;
[0129] Combined with the dynamic analysis, the additional force generated by the sinusoidal vibration excitation acts on the static ring;
[0130] According to the closing force, the opening force and the additional force generated by the sinusoidal vibration excitation, a new static ring force balance model is constructed. Optionally, the new static ring force balance model refers to:
[0131] F cl +F o +F a =0 (3).
[0132] Optionally, random vibration excitation is equivalent to sinusoidal vibration excitation A s =A sine sin(2πf n t).
[0133] Optional, distance wear k of stationary ring s ,for
[0134] where h w Indicates the wear height and wear amount of the stationary ring. k c is the wear coefficient, which is related to the hardness of the stationary ring. c is the sealing ring contact force, and L is the sliding distance.
[0135] In summary, this embodiment establishes a physical model of a rotating mechanical seal, abstracts the physical model of the rotating mechanical seal into a mass-spring-damper system; performs a dynamic analysis on the stationary ring of the rotating mechanical seal; performs an equivalent analysis of random vibration excitation and sinusoidal vibration excitation on the stationary ring of the rotating mechanical seal; and obtains the wear amount of the stationary ring based on Archard wear. This solves the problem that the existing methods rely on engineering experience or direct product testing to give wear results, lack theoretical analysis, and have low accuracy. This method equates the impact of random vibration excitation to sinusoidal machine vibration excitation, obtains the sealing ring contact force based on dynamic analysis, and finally obtains the distance wear amount.
[0136] The above description is only a preferred embodiment of this specification and is not intended to limit this specification. For those skilled in the art, this specification may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this specification shall be included in the protection scope of this specification.
Claims
1. A vibration wear calculation method for a rotary mechanical seal, characterized in that: include: According to the composition and structure of rotary mechanical seal, establish the physical model of rotary mechanical seal and determine the main wear parts; Conduct dynamic analysis on the stationary ring of the rotating mechanical seal to determine the closing force and opening force of the stationary ring; According to the equivalent fatigue damage theory, the random vibration excitation of the static ring in the rotating mechanical seal is equivalent to sinusoidal vibration excitation; combined with dynamic analysis, a new static ring force balance model is constructed; According to Archard's wear theory and the newly constructed static ring force balance model, the wear amount of the static ring is determined.
2. The method according to claim 1, characterized in that: The composition structure of the rotary mechanical seal includes: a spring, an O-ring, a stationary ring, a sealed fluid, a dynamic ring, a housing and a shaft; The physical model of the rotary mechanical seal is abstracted as a mass-spring-damper system; The main wearing part of the rotary mechanical seal is the stationary ring.
3. The method according to claim 2, characterized in that The closing force F cl Including the pressure of the sealed fluid F p and the spring pressure F s , the closing force is: Among them, r i and r o Respectively represent the inner radius and outer radius of the moving ring, r b is the equilibrium radius, P o is the pressure of the sealed fluid, P i The pressure of the external environment.
4. The method according to claim 1, characterized in that: Opening force F o Including the dynamic pressure F of the sealed fluid f Contact force F with sealing ring c , the opening force is: F o =F f +F c (2)。 5. The method according to claim 1, characterized in that According to the equivalent fatigue damage theory, the random vibration excitation of the static ring in the rotating mechanical seal is equivalent to the sinusoidal vibration excitation; combined with the dynamic analysis, a new static ring force balance model is constructed, including: According to the equivalent fatigue damage theory, the stationary ring of the rotating mechanical seal is subjected to equivalent analysis of random vibration excitation and sinusoidal vibration excitation; Combined with dynamic analysis, the additional force F generated by sinusoidal vibration excitation a Acting on the static ring; A new static ring force balance model is constructed based on the closing force, opening force and additional force generated by sinusoidal vibration excitation.
6. The method according to claim 5, characterized in that The new static ring force balance model refers to: F cl +F o +F a =0 (3)。 7. The method according to claim 1, characterized in that Random vibration excitation is equivalent to sinusoidal vibration excitation A s =A sine sin(2πf n t).
8. The method according to claim 1, characterized in that Distance wear of stationary ring k s ,for where h w Indicates the wear height and wear amount of the stationary ring. k c is the wear coefficient, which is related to the hardness of the stationary ring. c is the sealing ring contact force, and L is the sliding distance.
9. A vibration wear calculation device for a rotary mechanical seal, used to implement the method according to any one of claims 1 to 8, characterized in that: include: Physical model building module, closing force and opening force determination module, random vibration excitation equivalent module, wear amount calculation module; among which: The physical model building module is used to establish a physical model of the rotary mechanical seal according to the composition structure of the rotary mechanical seal and determine the main wear parts; The closing force and opening force determination module is used to perform dynamic analysis on the static ring of the rotary mechanical seal to determine the closing force and opening force of the static ring; The random vibration excitation equivalent module is used to convert the random vibration excitation of the stationary ring in the rotating mechanical seal into sinusoidal vibration excitation according to the equivalent fatigue damage theory; and to construct a new stationary ring force balance model in combination with dynamic analysis; The wear amount calculation module is used to determine the wear amount of the stationary ring according to Archard wear theory in combination with the newly constructed stationary ring force balance model.
10. An electronic device, characterized in that: include: Communications interface, processor and memory; The processor calls the program instructions in the memory to perform the following actions: According to the composition and structure of rotary mechanical seal, establish the physical model of rotary mechanical seal and determine the main wear parts; Conduct dynamic analysis on the stationary ring of the rotating mechanical seal to determine the closing force and opening force of the stationary ring; According to the equivalent fatigue damage theory, the random vibration excitation of the static ring in the rotating mechanical seal is equivalent to sinusoidal vibration excitation; combined with dynamic analysis, a new static ring force balance model is constructed; According to Archard's wear theory and the newly constructed static ring force balance model, the wear amount of the static ring is determined.