A device for simulating normal loading

Abstract

The application provides a normal load simulation device, which is more stable when bearing internal and external pressure through mutual nesting between structures. Especially, multiple support sleeves and connecting pieces are arranged, so that the stress of each part is uniformly dispersed. The inner and outer support sleeves and the inner and outer clamping sleeves provide rigid support for the whole device, so that it will not deform or shift when subjected to external force or pressure fluctuation. The design of connecting rods and pressure caps also enhances the overall structural stability, ensuring that the device can maintain its integrity when subjected to high pressure or impact. The combination of multi-stage sealing, bellows transmission and multi-layer support gives the device high safety. When working in a high-pressure environment, even if part of the sealing layer fails, other sealing layers can still provide effective protection. The device is designed with sufficient redundancy, so that gas is difficult to completely leak even in extreme conditions.

Description

Technical Field

[0001] This invention relates to the technical field of fretting wear testing apparatus, and more specifically to a device for simulating normal loading loads. Background Technology

[0002] Nuclear energy, as a safe, clean, and efficient low-carbon energy source, has become an important option for achieving sustainable energy and power development. However, during pressurized water reactor operation, flow-induced vibration-induced fretting wear of the Zr-4 alloy cladding can damage the contact surfaces, leading to the failure and even leakage of nuclear fuel assemblies. Statistics show that fretting wear is a major cause of fuel assembly failure in nuclear reactors.

[0003] To study the fretting wear characteristics of alloy cladding in the high-temperature and high-pressure environment of nuclear reactors, it is necessary to simulate the high-temperature and high-pressure environment. This places higher demands on the sealing of the loading unit and the experimental unit. Currently, most fretting wear research is conducted in a normal temperature environment, so the designed normal loading device does not have good airtightness and safety. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a device for simulating normal loading, which solves the technical problem that most of the research on fretting wear in the prior art is carried out in an environment of normal temperature, so the designed normal loading device does not have good airtightness and safety.

[0005] This invention provides a device for simulating normal loading loads, comprising:

[0006] Inner jacket, inner jacket base, inner jacket pressure cap, sealing outer sleeve, connector, inner retaining ring, transmission component, connecting chuck, bellows, outer connecting sleeve and inner support sleeve;

[0007] One end of the inner sleeve is connected to the transmission component, and the other end is connected to one end of the inner sleeve base. An inner sleeve pressure cap is fitted around the periphery of the inner sleeve. A sealing outer sleeve, an inner retaining ring, and an inner support sleeve are sequentially arranged around the periphery of the inner sleeve base. One end of the connecting chuck is sequentially connected to the sealing outer sleeve through the inner support sleeve and the inner retaining ring.

[0008] One end of the corrugated pipe is connected to the other end of the inner jacket base via a connector. The outer connecting sleeve is fitted around the periphery of the corrugated pipe. One end of the outer connecting sleeve is connected to the other end of the connecting chuck, and the other end is fitted with an outer sleeve nut.

[0009] Optionally, it also includes:

[0010] Connecting rod, outer retaining ring, connecting rod end cap, outer support sleeve, outer clamping sleeve, outer clamping sleeve base and outer clamping sleeve clamping nut;

[0011] One end of the connecting rod passes through the outer sleeve nut and connects to the other end of the bellows. The other end passes through the outer retaining ring and the outer support sleeve in sequence and connects to the connecting rod end cap. An outer clamping base is fitted on the outside of the outer retaining ring and the outer support sleeve. One end of the outer clamping base is connected to the outer sleeve nut, and the other end is connected to the outer clamping clamping nut through the outer clamping sleeve.

[0012] Optionally, the connecting chuck includes:

[0013] The circumference of one end of the connecting chuck is the same as the circumference of the outer sleeve.

[0014] Optionally, the outer retaining ring includes,

[0015] The circumference of the inner retaining ring is the same as the circumference of the inner thread of the outer sleeve nut.

[0016] Optionally, the connecting chuck further includes,

[0017] The connecting chuck is further recessed at one end near the sealing outer sleeve, and the circumference of the sealing part matches the circumference of the inner retaining ring.

[0018] Compared with the prior art, the present invention:

[0019] This loading device achieves ultra-high airtightness and excellent pressure absorption through step-by-step sealing, multi-layer sleeve support, and bellows drive, significantly enhancing the device's stability and durability. It can maintain reliable operation in high-pressure, high-frequency environments, effectively avoiding single-point failures and improving the system's safety and fault tolerance. Furthermore, the optimized design of the pressure cap and connecting chuck greatly improves the convenience of installation and maintenance, giving the device a long service life and low maintenance costs. It is very suitable for industrial applications with extremely high requirements for sealing, durability, and safety. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2This is a schematic diagram of the primary seal structure in this invention;

[0024] Figure 3 This is a schematic diagram of the secondary seal structure in this invention;

[0025] Figure 4 This is a schematic diagram of the four-level seal structure in this invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Inner sleeve; 2. Inner sleeve base; 3. Inner sleeve pressure cap; 4. Sealing outer sleeve; 5. Inner retaining ring; 6. Transmission component; 7. Connecting chuck; 8. Bellows; 9. Outer connecting sleeve; 10. Inner support sleeve; 11. Connecting rod; 12. Connecting rod end cap; 13. Outer retaining ring; 14. Outer support sleeve; 15. Outer sleeve base; 16. Outer sleeve clamping nut; 17. Connector; 18. Outer sleeve nut; 19. Outer sleeve. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other implementation cases obtained by those skilled in the art without creative effort are within the scope of protection of this application. Functional units with the same reference numerals in the examples of this invention have the same and similar structures and functions.

[0029] See Figure 1 The present invention provides a device for simulating normal loading loads, comprising:

[0030] Inner sleeve 1, inner sleeve base 2, inner sleeve pressure cap 3, sealing outer sleeve 4, connector 17, inner retaining ring 5, transmission component 6, connecting chuck 7, bellows 8, outer connecting sleeve 9, and inner support sleeve 10;

[0031] One end of the inner sleeve 1 is connected to the transmission component 6, and the other end is connected to one end of the inner sleeve base 2. The inner sleeve 1 is fitted with an inner sleeve pressure cap 3. The inner sleeve base 2 is sequentially surrounded by a sealing outer sleeve 4, an inner retaining ring 5, and an inner support sleeve 10. One end of the connecting chuck 7 is sequentially connected to the sealing outer sleeve 4 through the inner support sleeve 10 and the inner retaining ring 5.

[0032] One end of the corrugated pipe 8 is connected to the other end of the inner jacket base 2 via a connector 17. The outer connecting sleeve 9 is sleeved on the periphery of the corrugated pipe 8. One end of the outer connecting sleeve 9 is connected to the other end of the connecting chuck 7, and the other end is fitted with an outer sleeve nut 18.

[0033] See Figure 2 In this embodiment, during actual operation, the end of the transmission component 6 away from the inner sleeve 1 is usually connected to the wear test device. Therefore, one end of the inner sleeve 1 is connected to the transmission component 6, and the other end is connected to one end of the inner sleeve base 2. The inner sleeve cap 3 can achieve both a fixed connection and a sealing effect. Furthermore, the sealing outer sleeve 4, which is fitted around the inner sleeve base 2, can also form a primary barrier to prevent external gas or impurities from entering, thus forming a first-level seal.

[0034] See Figure 3 By using the inner support sleeve 10 and the inner retaining ring 5 encircling the inner jacket base 2, a sealed connection is achieved when the inner retaining ring 5 is abutted between the connecting chuck 7 and the sealing outer sleeve 4. The inner support sleeve 10 is also used to fill the gap between the inside of the connecting chuck 7 and the inner jacket base 2, thus achieving a secondary seal.

[0035] One end of the bellows 8 is connected to the other end of the inner jacket base 2 via an inner connecting pipe. It not only serves as a seal but also plays a crucial role in the micro-motion transmission within the device, ensuring the seal is not easily damaged. Furthermore, the bellows 8 is made of high-quality material and has high processing precision, effectively maintaining its shape and returning to its original state under high pressure, providing continuous stability. The bellows 8 not only increases the flexibility of the sealing layer but also reduces the direct impact of high-pressure gas on the device, allowing it to maintain airtightness even under significant pressure fluctuations. Additionally, an outer connecting sleeve 9 is fitted around the periphery of the bellows 8. One end of the outer connecting sleeve 9 is connected to the other end of the connecting chuck 7, and the other end is fitted with an outer sleeve nut 18. The outer sleeve nut 18 is used to increase the airtightness of the outer connecting sleeve 9, preventing internal gas from diffusing outwards, thus forming a three-stage seal.

[0036] In another embodiment, it further includes:

[0037] Connecting rod 11, outer retaining ring 13, connecting rod end cap 12, outer support sleeve 14, outer clamping sleeve 19, outer clamping sleeve base 15, and outer clamping sleeve clamping nut 16;

[0038] One end of the connecting rod 11 passes through the outer sleeve nut 18 and connects to the other end of the bellows 8. The other end passes through the outer retaining ring 13 and the outer support sleeve 14 in sequence and connects to the connecting rod end cap 12. An outer clamping base 15 is fitted on the outside of the outer retaining ring 13 and the outer support sleeve 14. One end of the outer clamping base 15 is connected to the outer sleeve nut 18, and the other end is connected to the outer clamping nut 16 through the outer clamping sleeve 19.

[0039] See Figure 4The outer clamping nut 16 at the end is located at the end of the connecting rod. The outer clamping nut 19 is similar to a conical structure with a gap. The outer clamping nut is fixed to the outer clamping base 15. The tighter it is screwed on, the tighter the conical fit between the outer clamping nut 19 and the outer clamping nut 12 becomes, and the smaller the gap in the outer clamping nut 19 becomes. This results in a tighter clamping of the connecting rod end cap 12, achieving a seal by reducing the gap, thus forming a four-level seal. This layer mainly serves as the final leak-proof layer. Even if other sealing layers fail, the outer clamping nut 16 at the end can still provide effective protection.

[0040] In another embodiment, the connecting chuck 7 includes:

[0041] The circumference of one end of the connecting chuck 7 is the same as the circumference of the outer sleeve.

[0042] The circumference of one end of the connecting chuck 7 is set to be the same as the circumference of the outer sleeve to facilitate wear testing.

[0043] In another embodiment, the outer retaining ring 13 includes,

[0044] The circumference of the inner retaining ring 5 is the same as the circumference of the inner thread of the outer sleeve nut 18.

[0045] The circumference of the inner retaining ring 5 is set to be consistent with the circumference of the inner thread of the outer sleeve nut 18 to further achieve a seal.

[0046] This invention employs a multi-layered sleeve structure, significantly enhancing its structural strength. The nested structure makes the device more stable under both internal and external pressures. In particular, the inclusion of multiple support sleeves and connectors ensures that stress is evenly distributed across each component. The inner and outer support sleeves, inner jacket 1, and outer jacket base 15 provide rigid support for the entire device, preventing deformation or displacement under external forces or pressure fluctuations. The design of the connecting rod 11 and pressure cap further enhances overall structural stability, ensuring the device maintains its integrity under high pressure or impact. Furthermore, the combination of multi-stage sealing, bellows 8 transmission, and multi-layered support provides the device with extremely high safety. Even if some sealing layers fail under high pressure, others still provide effective protection. The device design has sufficient redundancy, making complete gas leakage difficult even under extreme conditions. Moreover, due to the high-strength design of the support sleeves, the device prevents breakage or failure under external impact.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A device for simulating normal loading loads, characterized in that, include: Inner jacket, inner jacket base, inner jacket pressure cap, sealing outer sleeve, connector, inner retaining ring, transmission component, connecting chuck, bellows, outer connecting sleeve, inner support sleeve, outer sleeve nut; One end of the inner sleeve is connected to the transmission component, and the other end is connected to one end of the inner sleeve base. An inner sleeve pressure cap is fitted around the periphery of the inner sleeve. A sealing outer sleeve, an inner retaining ring, and an inner support sleeve are sequentially arranged around the periphery of the inner sleeve base. One end of the connecting chuck is sequentially connected to the sealing outer sleeve through the inner support sleeve and the inner retaining ring. One end of the corrugated pipe is connected to the other end of the inner jacket base via a connector. The outer connecting sleeve is fitted around the periphery of the corrugated pipe. One end of the outer connecting sleeve is connected to the other end of the connecting chuck, and the other end is fitted with an outer sleeve nut. Also includes: Connecting rod, outer retaining ring, connecting rod end cap, outer support sleeve, outer clamping sleeve, outer clamping sleeve base and outer clamping sleeve clamping nut; One end of the connecting rod passes through the outer sleeve nut and connects to the other end of the bellows. The other end passes through the outer retaining ring and the outer support sleeve in sequence and connects to the connecting rod end cap. An outer clamping base is fitted on the outside of the outer retaining ring and the outer support sleeve. One end of the outer clamping base is connected to the outer sleeve nut, and the other end is connected to the outer clamping clamping nut through the outer clamping sleeve.

2. The device for simulating normal loading load as described in claim 1, characterized in that, The connecting chuck includes: The circumference of one end of the connecting chuck is the same as the circumference of the outer sleeve.

3. The device for simulating normal loading load as described in claim 1, characterized in that, The outer retaining ring includes, The circumference of the inner retaining ring is the same as the circumference of the inner thread of the outer sleeve nut.

4. The device for simulating normal loading load as described in claim 1, characterized in that, The connecting chuck also includes, The connecting chuck is further recessed at one end near the sealing outer sleeve, and the circumference of the sealing part matches the circumference of the inner retaining ring.

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