Vacuum circuit breaker opening transmission system, vacuum circuit breaker and buffering method
The transmission system with a built-in gas buffer chamber solves the impact problem during the opening process of the vacuum circuit breaker, achieving a highly efficient and stable buffering effect and improving the operating performance and reliability of the vacuum circuit breaker.
Patent Information
- Application Number
- CN202511876598.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-02-13
AI Technical Summary
Existing vacuum circuit breaker tripping buffer technology has the disadvantages of complex structure, large space occupation, and buffering effect that is significantly affected by environmental factors. Furthermore, traditional buffering methods are difficult to effectively solve the impact problem during the tripping process.
The transmission system with a built-in gas buffer chamber forms a gas buffer chamber through the relative sliding of the first and second components. Combined with the buffer gas path to regulate the rate of gas pressure change, it provides precise buffering force and avoids mechanical fatigue and temperature effects.
It achieves smooth operation during the opening process, improves the movement accuracy of the moving contact and the stability and reliability of the vacuum circuit breaker, reduces mechanical shock and wear, and adapts to the buffering requirements of different working conditions.
Smart Images
Figure CN121528809A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of high-voltage switch technology, and in particular to a vacuum circuit breaker tripping drive system, a vacuum circuit breaker, and a buffering method. Background Technology
[0002] In the field of high-voltage switchgear, the performance of vacuum circuit breakers is crucial for the safe and stable operation of power systems. Currently, there are various methods for vacuum circuit breaker tripping buffering technology both domestically and internationally, but all have certain limitations.
[0003] In existing technologies, vacuum circuit breaker tripping buffers are mostly external and concentrated in the spring operating mechanism. This method cannot effectively solve the problem of collision and impact on internal components during the tripping process, making components susceptible to damage from high impact forces, causing connections to loosen, and exacerbating resonance effects.
[0004] Existing buffering technologies primarily employ spring buffers. Spring buffers mainly absorb impact kinetic energy through the elastic deformation of the spring; however, springs face the risk of fatigue fracture during long-term use, resulting in low reliability. Moreover, in high-speed tripping scenarios, spring buffers are insufficient to meet the requirements and cannot effectively solve the impact problem during tripping.
[0005] In addition, some manufacturers use hydraulic buffer devices, which utilize hydraulic oil to absorb energy through a throttling orifice for buffering. However, hydraulic buffer devices have the disadvantage of large size, which undoubtedly increases the installation space and design difficulty of the equipment. At the same time, the performance of hydraulic oil is greatly affected by temperature; the buffering effect will change significantly under different temperature environments, affecting the stability and reliability of the buffer device.
[0006] Furthermore, no relevant structure has yet been found that integrates a gas buffer device into the internal drive system of a vacuum circuit breaker, leaving a technological gap in the efficient solution to the opening buffer problem of vacuum circuit breakers. Summary of the Invention
[0007] The purpose of this invention is to provide a vacuum circuit breaker tripping transmission system, a vacuum circuit breaker, and a buffering method to solve the problems existing in the prior art. The structure is simple, effectively avoids contact stroke errors caused by permanent deformation of traditional contact-type buffer components, effectively improves the movement accuracy of the moving contact, and ensures the tripping performance of the vacuum circuit breaker.
[0008] To achieve the above objectives, the present invention provides the following solution: This invention provides a vacuum circuit breaker tripping transmission system, comprising: a transmission mechanism, the transmission mechanism including a first component, a second component, and an elastic element, the first component being sleeved within the second component and elastically connected through the elastic element, and the first component and the second component being capable of sliding relative to each other in the tripping direction of the vacuum circuit breaker; the end of the first component away from the second component being fixedly connected to the moving contact of the vacuum circuit breaker, and the end of the second component away from the first component being fixedly connected to the insulating pull rod of the tripping operation mechanism of the vacuum circuit breaker; wherein, a sealed gas buffer cavity is formed between the outer wall of the first component and the inner wall of the second component, and the gas buffer cavity is compressed or expanded to provide buffering force as the first component and the second component move away from or closer to each other; the buffer gas passage is provided on the first component to connect the sealed cavity and the external environment to adjust the rate of change of gas pressure in the gas buffer cavity.
[0009] Preferably, the outer periphery of the end of the first component that extends into the second component is provided with a first annular protrusion, the first annular protrusion being slidably and sealingly connected to the inner wall of the second component, and the inner periphery of the end of the second component away from the insulating pull rod is provided with a second annular protrusion, the second annular protrusion being slidably and sealingly connected to the outer wall of the first component, the first annular protrusion, the second annular protrusion, the outer wall of the first component, and the inner wall of the second component forming the gas buffer cavity.
[0010] Preferably, the transmission mechanism further includes a first sealing ring and a second sealing ring. A first annular groove is provided on the outer side of the first annular protrusion. The first sealing ring is engaged with the first annular groove, and the portion of the first sealing ring protruding from the first annular groove is slidably and sealingly connected to the inner wall of the second component. A second annular groove is provided on the inner side of the second annular protrusion. The second sealing ring is engaged with the second annular groove, and the portion of the second sealing ring protruding from the second annular groove is slidably and sealingly connected to the outer wall of the first component.
[0011] Preferably, the buffer gas path includes a damping hole group disposed on the side wall of the first component, the damping hole group connecting the gas buffer chamber with the inner cavity of the first component, and the inner cavity of the first component being connected to the external environment.
[0012] Preferably, the damping hole group includes a plurality of radial through holes and a plurality of oblique through holes. The radial through holes are arranged perpendicular to the axis of the first component, and the oblique through holes are arranged obliquely to the axis of the first component. The side of the oblique through hole closest to the axis of the first component is inclined toward the end of the first component connected to the moving contact.
[0013] Preferably, the radial through holes are evenly distributed in the circumferential direction of the first component, and the oblique through holes are evenly distributed in the circumferential direction of the first component.
[0014] Preferably, the combination of the diameter, number and / or distribution position of the damping orifice group is adapted to the buffer force required at different speed stages during the opening process.
[0015] Preferably, the elastic element is a contact spring.
[0016] The present invention also provides a vacuum circuit breaker comprising a vacuum circuit breaker tripping drive system as described in any of the preceding claims.
[0017] The present invention also provides a method for buffering the tripping of a vacuum circuit breaker, which is based on the tripping drive system described in any of the preceding claims and includes the following steps: During the opening process, the opening operation mechanism drives the insulating pull rod to move the second component away from the stationary contact. At this time, the first component and the second component move away from each other. The elastic element is stretched to store elastic potential energy, and the volume of the gas buffer cavity formed between the two gradually decreases and is compressed. The expansion force generated by the compression of the gas in the gas buffer cavity can slow down the sliding speed of the first component and the second component moving away from each other. Furthermore, the moving contact separates from the stationary contact, and the first component moves closer to the second component under the action of the elastic element. The volume of the gas buffer cavity formed between the two gradually increases and expands. The contraction force generated by the expansion of the gas in the gas buffer cavity can slow down the sliding speed of the first component and the second component moving closer to each other. During compression or expansion, the gas inside the gas buffer chamber exchanges gas with the external environment through the buffer gas path to regulate the rate of change of gas pressure inside the chamber.
[0018] The present invention achieves the following technical effects compared to the prior art: This invention provides a vacuum circuit breaker tripping transmission system, a vacuum circuit breaker, and a buffering method. By integrating the transmission mechanism, the buffering function is built-in during the tripping process, effectively solving the problems of complex structure, large space occupation, and significant environmental influence on buffering effect in traditional external buffering methods. Specifically, the first and second components of the transmission mechanism are elastically connected by an elastic element and can slide relative to each other, driving the moving contact during tripping. The gas buffer chamber is enclosed by the two components to form a sealed structure. During relative movement, volume changes generate buffering force, and with the adjustment of the gas pressure change rate by the buffer gas path, the impact force during tripping can be precisely controlled. Compared with existing spring buffers, gas buffers have the advantages of rapid response and no risk of mechanical fatigue, avoiding the problem of decreased buffering performance after long-term use. Compared with hydraulic buffers, it does not require hydraulic oil, is unaffected by temperature changes, and significantly improves stability and reliability. Furthermore, its compact overall structure facilitates integration into the vacuum circuit breaker, providing an effective technical solution for the miniaturization and high-performance of high-voltage switchgear. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of the vacuum circuit breaker tripping drive system provided by the present invention; Figure 2 An enlarged view of the gas buffer chamber in the vacuum circuit breaker tripping transmission system provided by the present invention; In the figure: 1. First component; 11. First annular protrusion; 12. First sealing ring; 2. Second component; 21. Second annular protrusion; 22. Second sealing ring; 23. Spring sleeve; 24. Plug; 3. Gas buffer chamber; 4. Radial damping hole; 5. Axial damping hole; 6. Elastic element; 7. Stationary contact; 8. Moving contact; 9. Insulating pull rod. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] The purpose of this invention is to provide a vacuum circuit breaker tripping transmission system, a vacuum circuit breaker, and a buffering method to solve the problems existing in the prior art. The structure is simple, effectively avoids contact stroke errors caused by permanent deformation of traditional contact-type buffer components, effectively improves the movement accuracy of the moving contact, and ensures the tripping performance of the vacuum circuit breaker.
[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0024] Example 1 This embodiment provides a vacuum circuit breaker tripping transmission system, as shown in Figures 1 and 2. It includes a transmission mechanism comprising a first component 1, a second component 2, and an elastic element 6. The second component has an inner cavity. The first component 1 is slidably fitted into the inner cavity of the second component 2 and elastically connected via the elastic element 6 in the sliding direction, corresponding to the tripping direction of the vacuum circuit breaker. The end of the first component 1 away from the second component 2 is fixedly connected to the moving contact 8 of the vacuum circuit breaker. The end of the second component 2 away from the first component 1 is fixedly connected to the insulating pull rod 9 of the vacuum circuit breaker tripping operation mechanism. This structural design allows the transmission mechanism to transmit the action of the tripping operation mechanism to the moving contact 8 during vacuum circuit breaker tripping, thus realizing the tripping movement of the moving contact 8. Simultaneously, the elastic connection between the first component 1 and the second component 2 via the elastic element 6, allowing them to slide relative to each other, helps to buffer and adjust the movement of the moving contact 8 during tripping, improving the smoothness of the tripping action, reducing the impact force that may be generated during tripping, thereby protecting the relevant components of the vacuum circuit breaker and extending the service life of the equipment. A sealed gas buffer chamber 3 is formed between the outer wall of the first component 1 and the inner wall of the second component 2. The gas buffer chamber 3 is compressed or expanded as the first component 1 and the second component 2 move away from or towards each other to provide buffering force. A buffer gas path is provided on the first component to connect the sealed chamber to the external environment, thereby regulating the rate of change of gas pressure within the gas buffer chamber. Thus, the arrangement of the gas buffer chamber 3 and the buffer gas path further optimizes the tripping process. The gas buffer chamber 3 is compressed or expanded during the relative movement of the first component 1 and the second component 2, utilizing the compressibility of gas to provide buffering force, effectively slowing down the change in the movement speed of the moving contact 8 and reducing vibration and impact during the tripping process. The buffer gas path connects the sealed chamber to the external environment, precisely regulating the rate of change of gas pressure within the gas buffer chamber 3, making the magnitude and variation of the buffering force more reasonable, better adapting to different tripping conditions of the vacuum circuit breaker, and improving the stability and reliability of the tripping operation.
[0025] In a preferred embodiment, a first annular protrusion 11 is provided on the outer periphery of the end of the first component 1 that extends into the second component 2. The first annular protrusion 11 is slidably and sealingly connected to the inner wall of the second component 2. A second annular protrusion 21 is provided on the inner periphery of the end of the second component 2 away from the insulating pull rod 9. The second annular protrusion 21 is slidably and sealingly connected to the outer wall of the first component 1. The first annular protrusion 11, the second annular protrusion 21, the outer wall of the first component 1, and the inner wall of the second component 2 enclose a gas buffer cavity 3. Thus, by providing the first annular protrusion 11 and the second annular protrusion 21, the spatial range of the gas buffer cavity 3 can be precisely defined, ensuring the airtightness of the gas buffer cavity 3 and enabling the gas to effectively provide buffering force during compression and expansion. At the same time, the sliding sealing connection ensures that the gas pressure in the gas buffer cavity 3 remains stable during the relative sliding of the first component 1 and the second component 2, preventing gas leakage from affecting the buffering effect and ensuring the consistency and stability of the buffering performance.
[0026] In a preferred embodiment, the transmission mechanism further includes a first sealing ring 12 and a second sealing ring 22. A first annular groove is provided on the outer side of the first annular protrusion 11. The first sealing ring 12 is engaged with the first annular groove, and the portion of the first sealing ring 12 protruding from the first annular groove is slidably and sealingly connected to the inner wall of the second component 2. A second annular groove is provided on the inner side of the second annular protrusion 21. The second sealing ring 22 is engaged with the second annular groove, and the portion of the second sealing ring 22 protruding from the second annular groove is slidably and sealingly connected to the outer wall of the first component 1. Thus, the first sealing ring 12 and the second sealing ring 22 further enhance the sealing performance of the gas buffer chamber 3, reduce the possibility of gas leakage, and improve the effectiveness of the buffer gas path in regulating gas pressure changes. Simultaneously, the engagement and sliding sealing design of the sealing rings and components ensures sealing performance during relative sliding without hindering the normal relative movement between the first component 1 and the second component 2, enabling the tripping transmission system to maintain good dynamic performance while achieving its buffering function.
[0027] In a preferred embodiment, the buffer gas path includes a damping orifice group disposed on the side wall of the first component 1. The damping orifice group connects the gas buffer chamber 3 with the inner cavity of the first component 1, and the inner cavity of the first component 1 is connected to the external environment. As a key component of the buffer gas path, the damping orifice group regulates the gas exchange rate between the gas buffer chamber 3 and the external environment. By connecting the gas buffer chamber 3 with the inner cavity of the first component 1 and then with the external environment, the pressure change within the gas buffer chamber 3 can be precisely controlled. When the gas buffer chamber 3 is compressed or expanded during the opening process, gas enters and exits in an orderly manner through the damping orifice group, making the buffering force more stable and adjustable, effectively reducing mechanical impact during the opening process, and improving the operational stability of the vacuum circuit breaker.
[0028] In a preferred embodiment, the damping orifice assembly includes multiple radial through holes 4 and multiple oblique through holes 5. The radial through holes 4 are perpendicular to the axis of the first component 1, and the oblique through holes 5 are inclined to the axis of the first component 1. The side of the oblique through hole 5 closest to the axis of the first component 1 is inclined toward the end where the first component 1 is connected to the moving contact 8. Thus, by the radial through holes 4 being inclined toward the end where the first component 1 is connected to the moving contact 8, an axial force opposite to the compression direction can be provided during the compression of the gas buffer chamber 3, and an axial force opposite to the expansion direction can be provided during the expansion of the gas buffer chamber 3, further enhancing the buffering effect.
[0029] In a preferred embodiment, the radial through holes 4 are evenly distributed in the circumference of the first component 1, and the oblique through holes 5 are evenly distributed in the circumference of the first component 1. This even distribution ensures that the flow rate of gas entering and exiting the gas buffer chamber 3 through the radial through holes 4 and the oblique through holes 5 is uniform in the circumference of the first component 1. It avoids uneven gas pressure distribution in the gas buffer chamber 3 due to excessively dense or sparse distribution of local through holes, thereby ensuring that the first component 1 and the second component 2 are subjected to uniform force during relative movement, reducing the phenomenon of uneven wear or jamming caused by force imbalance, further improving the smoothness and reliability of the tripping transmission system, and also helping to simplify the processing technology and reduce the impact of assembly errors in the production process on the buffer performance. In a preferred embodiment, the combination of the diameter, number and / or position of the damping orifice group is adapted to the buffer force required at different stages of the circuit breaker tripping process. This adaptation design can precisely adjust the gas pressure change in the gas buffer chamber 3 according to the actual needs of speed, acceleration and impact force at different stages of the circuit breaker tripping process, thereby providing a corresponding buffer force.
[0030] Provide specific data on the diameter distribution of the damping orifice group (corresponding to different models of vacuum circuit breakers). In a preferred embodiment, the elastic element 6 is a contact spring. As an elastic element 6, the contact spring provides the necessary elastic force during opening and closing, ensuring close contact between the moving contact 8 and the stationary contact 7 during closing and rapid, reliable separation during opening. The elastic characteristics of the contact spring also buffer the impact force during opening and closing to a certain extent. Together with the gas buffer chamber 3 and the buffer gas path, they jointly improve the stability and reliability of the vacuum circuit breaker's opening and closing operation. Furthermore, the contact spring has a simple structure and low cost, which is beneficial for product production and promotion.
[0031] In a preferred embodiment, the second component 2 includes a spring cylinder 23 and a plug 24. The spring cylinder 23 is a cylindrical structure with one open end, which is used for the first component 1 to extend into and form a sliding fit. The plug 24 is fixedly disposed at the closed end of the spring cylinder 23, and the plug 24 has a mounting portion for connecting with the insulating pull rod 9. A second annular protrusion 21 is disposed at the open end of the spring cylinder 23. The inner wall of the spring cylinder 23 and the outer wall of the first component 1 form a sealing fit through the first annular protrusion 11 and the second annular protrusion 21 to enclose the main space of the gas buffer chamber 3. The plug 24 provides a stable support structure for the connection of the insulating pull rod 9, ensuring that the driving force of the tripping operation mechanism can be reliably transmitted to the second component 2.
[0032] In a preferred embodiment, the first component 1 is a cylindrical slider, one end of which is fixedly connected to the moving contact 8 by bolts, and the other end has a first annular protrusion 11 on its outer periphery. The inner cavity of the cylindrical slider is connected to the external environment, providing a channel for the flow of gas in the buffer gas path. When the relative movement between the first component 1 and the second component 2 causes a change in the volume of the gas buffer chamber 3, the gas can enter or exit the inner cavity of the first component 1 through the damping orifice group, and then exchange through the connection between the inner cavity and the external environment, thereby achieving precise control of the rate of change of gas pressure in the gas buffer chamber 3. The cylindrical structure design not only reduces the overall weight of the first component 1 and the inertial load during the opening process, but also facilitates the smooth flow of internal airflow, avoiding the impact of airflow obstruction on the timeliness and stability of the buffering effect. In addition, the machining accuracy of the sliding mating surface between the outer periphery of the cylindrical slider and the inner wall of the second component 2 is easy to ensure, which can further improve the stability of the relative movement between the two, reduce mechanical wear, and extend the service life of the components.
[0033] Example 2 This embodiment also provides a vacuum circuit breaker including the vacuum circuit breaker tripping drive system as described above. Using the aforementioned vacuum circuit breaker tripping drive system allows the vacuum circuit breaker to achieve better buffering and protection during the tripping process. The optimized tripping drive system can effectively reduce the tripping impact force, reduce wear and damage to mechanical parts, and extend service life; improve the stability and reliability of tripping operations, and reduce the failure rate caused by tripping problems; at the same time, through precise control of the tripping process, it helps to improve the overall electrical performance and operational safety of the vacuum circuit breaker, enhancing the product's competitiveness and practicality in the market.
[0034] Example 3 This embodiment also provides a vacuum circuit breaker tripping buffer method, which is based on the tripping drive system described above and includes the following steps: During the tripping operation, the tripping mechanism comes into play, driving the insulating rod 9, which in turn moves the second component 2 away from the stationary contact 7. During this movement, the first component 1 and the second component 2 are observed to move away from each other. At this time, the elastic element 6 is gradually stretched due to this relative movement, and as it stretches, its elastic potential energy is gradually stored. Simultaneously, the volume of the gas buffer cavity 3 formed between the first component 1 and the second component 2 gradually decreases as they move away from each other, resulting in the gas buffer cavity 3 being compressed. The gas inside the gas buffer cavity 3 generates an expansion force when compressed, which plays a crucial role in effectively slowing down the sliding speed of the first component 1 and the second component 2 as they move away from each other.
[0035] Furthermore, the situation changes again after the moving contact 8 and the stationary contact 7 disengage. At this time, under the influence of the elastic potential energy stored in the elastic element 6, the first component 1 begins to move towards the second component 2. During this relatively close movement, the volume of the gas buffer cavity 3 formed between the first component 1 and the second component 2 gradually increases, thus causing the gas buffer cavity 3 to be in an expanded state. The gas inside the gas buffer cavity 3 generates a contraction force when it expands, and this contraction force is also of great significance, as it can effectively reduce the sliding speed of the first component 1 and the second component 2 when they approach each other.
[0036] Furthermore, throughout the entire process, whether the gas buffer chamber 3 is compressed or expanded, the gas inside it exchanges with the external environment through the buffer gas path. This gas exchange process is crucial because it regulates the rate of pressure change inside the gas buffer chamber 3, thereby ensuring that the entire circuit breaker tripping process is more stable and orderly.
[0037] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A vacuum circuit breaker tripping drive system, characterized in that: include: The transmission mechanism includes a first component (1), a second component (2), and an elastic element (6). The second component (2) has an inner cavity. The first component (1) is slidably sleeved in the inner cavity of the second component (2) and elastically connected by the elastic element (6) in the sliding direction. The sliding direction corresponds to the opening direction of the vacuum circuit breaker. The end of the first component (1) away from the second component (2) is used to be fixedly connected to the moving contact (8) of the vacuum circuit breaker. The end of the second component (2) away from the first component (1) is used to be fixedly connected to the insulating pull rod (9) of the opening operation mechanism of the vacuum circuit breaker. Wherein, a sealed gas buffer cavity (3) is formed between the outer wall of the first component (1) and the inner wall of the second component (2), and the gas buffer cavity (3) is compressed or expanded to provide buffering force as the first component (1) and the second component (2) move away from or closer to each other. The buffer gas passage is provided on the first component to connect the sealed cavity and the external environment to adjust the rate of change of gas pressure in the gas buffer cavity.
2. The vacuum circuit breaker tripping drive system according to claim 1, characterized in that: The first component (1) has a first annular protrusion (11) on its outer periphery extending into the second component (2). The first annular protrusion (11) is slidably and sealingly connected to the inner wall of the second component (2). The second component (2) has a second annular protrusion (21) on its inner periphery at the end away from the insulating pull rod (9). The second annular protrusion (21) is slidably and sealingly connected to the outer wall of the first component (1). The first annular protrusion (11), the second annular protrusion (21), the outer wall of the first component (1), and the inner wall of the second component (2) form the gas buffer cavity (3).
3. The vacuum circuit breaker tripping drive system according to claim 2, characterized in that: The transmission mechanism further includes a first sealing ring (12) and a second sealing ring (22). A first annular groove is provided on the outer side of the first annular protrusion (11). The first sealing ring (12) is engaged with the first annular groove, and the portion of the first sealing ring (12) protruding from the first annular groove is slidably and sealingly connected to the inner wall of the second component (2). A second annular groove is provided on the inner side of the second annular protrusion (21). The second sealing ring (22) is engaged with the second annular groove, and the portion of the second sealing ring (22) protruding from the second annular groove is slidably and sealingly connected to the outer wall of the first component (1).
4. The vacuum circuit breaker tripping drive system according to claim 1, characterized in that: The buffer gas path includes a damping hole group disposed on the side wall of the first component (1), the damping hole group connecting the gas buffer chamber (3) with the inner cavity of the first component (1), and the inner cavity of the first component (1) being connected to the external environment.
5. The vacuum circuit breaker tripping drive system according to claim 4, characterized in that: The damping hole group includes multiple radial through holes and multiple oblique through holes. The radial through holes are arranged perpendicular to the axis of the first component (1), and the oblique through holes are arranged obliquely to the axis of the first component (1). The oblique through holes are inclined towards the end of the first component (1) connected to the moving contact (8) on the side of the oblique through holes close to the axis of the first component (1).
6. The vacuum circuit breaker tripping drive system according to claim 5, characterized in that: The radial through holes are evenly distributed in the circumferential direction of the first component (1), and the oblique through holes are evenly distributed in the circumferential direction of the first component (1).
7. The vacuum circuit breaker tripping drive system according to claim 6, characterized in that: The combination of the diameter, number, and / or distribution of the damping orifice group is adapted to the buffer force required at different speed stages during the opening process.
8. The vacuum circuit breaker tripping drive system according to claim 1, characterized in that: The elastic element (6) is a contact spring.
9. A vacuum circuit breaker, characterized in that, It includes a vacuum circuit breaker tripping drive system as described in any one of claims 1 to 8.
10. A method for buffering the tripping of a vacuum circuit breaker, characterized in that, This method is implemented based on the tripping drive system according to any one of claims 1 to 8, and includes the following steps: During the opening process, the opening operation mechanism drives the insulating pull rod (9) to move the second component (2) away from the stationary contact (7). At this time, the first component (1) and the second component (2) move away from each other. The elastic element (6) is stretched to store elastic potential energy, and the volume of the gas buffer cavity (3) formed between the two gradually decreases and is compressed. The expansion force generated by the gas in the gas buffer cavity (3) being compressed can slow down the sliding speed of the first component (1) and the second component (2) moving away from each other. Furthermore, the moving contact (8) separates from the stationary contact (7), and the first component (1) moves relatively closer to the second component (2) under the action of the elastic element (6). The volume of the gas buffer cavity (3) formed between the two gradually increases and expands. The contraction force generated by the expansion of the gas in the gas buffer cavity (3) can slow down the sliding speed of the first component (1) and the second component (2) moving relatively closer. During compression or expansion, the gas in the gas buffer chamber (3) exchanges with the external environment through the buffer gas path to regulate the rate of change of gas pressure in the chamber.