High-speed train carriage wheel clamping spring device

Abstract

The utility model belongs to spring technical field discloses a high -speed rail carriage wheel clamping pull spring device, including four springs, four spring symmetry is arranged in high -speed rail carriage wheel clamping wheel clamping position both sides, is used to play balance to wheel clamping, the surface of spring is equipped with stress buffer layer, nanometer ceramic wear -resisting layer and hydrophobic layer in proper order. This application sets up stress buffer layer, nanometer ceramic wear -resisting layer and hydrophobic layer in proper order on the surface of spring, forms multilayer protection, has improved the corrosion resistance and wear resistance of spring, can effectively block the outside medium erosion and wear and tear, delays the peeling process of coating, thereby improved the service life of pull spring device.

Description

Technical Field

[0001] This utility model belongs to the field of spring technology, specifically relating to a tension spring device for a high-speed train carriage wheel. Background Technology

[0002] Currently, the tension spring system for high-speed train carriages generally employs a symmetrically arranged multi-spring structure to balance the tension springs. In traditional designs, the tension springs are mostly made of high-strength alloy steel, and their surfaces are usually treated with an anti-rust coating to improve corrosion resistance. While this design can meet basic functional requirements, under long-term, high-frequency loads, the coating on the spring surface is prone to peeling off due to corrosion, wear, or stress concentration, leading to spring fatigue fracture and directly affecting the lifespan of the tension spring system. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a high-speed train carriage pull spring device. By sequentially setting a stress buffer layer, a nano-ceramic wear-resistant layer and a hydrophobic layer on the surface of the spring, a multi-layer protection is formed, which improves the corrosion resistance and wear resistance of the spring, effectively blocks the erosion and wear of external media, delays the coating peeling process, and thus improves the service life of the pull spring device.

[0004] The technical solution of this utility model is: a high-speed train carriage wheel clamping spring device, comprising four springs, which are symmetrically arranged on both sides of the high-speed train carriage wheel clamping position to balance the wheel;

[0005] The surface of the spring is sequentially provided with a stress buffer layer, a nano-ceramic wear-resistant layer, and a hydrophobic layer.

[0006] Preferably, the thickness of the stress buffer layer is 10–20 μm, the thickness of the nano-ceramic wear-resistant layer is 30–50 μm, and the thickness of the hydrophobic layer is 1–3 μm.

[0007] Preferably, the stress buffer layer is a polyurethane elastic layer and the hydrophobic layer is a fluorinated polymer layer.

[0008] Preferably, the spring includes a body, with hooks at both ends of the body. The outer diameter of the hooks is 24-26 mm, and the distance between the end of the hook and the body is 2.5-3.5 mm.

[0009] Preferably, the spring has a wire diameter of 4-6 mm and a helical number of 11-13 turns.

[0010] Preferably, the pitch of the spring decreases non-linearly from the middle to both ends.

[0011] Preferably, the spring is made of high-carbon chromium vanadium alloy steel.

[0012] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0013] This application forms a multi-layered protection by sequentially setting a stress buffer layer, a nano-ceramic wear-resistant layer, and a hydrophobic layer on the surface of the spring. This improves the corrosion resistance and wear resistance of the spring, effectively blocks external media from erosion and wear, and slows down the coating peeling process, thereby increasing the service life of the tension spring device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the structure of this utility model.

[0017] In the attached diagram: 10, spring; 11, body; 12, hook; 20, stress buffer layer; 30, nano-ceramic wear-resistant layer; 40, hydrophobic layer. Detailed Implementation

[0018] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] Please see Figure 1-2 A high-speed train carriage wheel clamping spring device includes four springs 10, which are symmetrically arranged on both sides of the high-speed train carriage wheel clamping position to balance the wheel.

[0020] The surface of the spring 10 is sequentially provided with a stress buffer layer 20, a nano-ceramic wear-resistant layer 30, and a hydrophobic layer 40. By sequentially providing the stress buffer layer 20, the nano-ceramic wear-resistant layer 30, and the hydrophobic layer 40 on the surface of the spring 10, a multi-layer protection is formed, which improves the corrosion resistance and wear resistance of the spring 10, effectively blocks the erosion and wear of external media, delays the coating peeling process, and thus improves the service life of the tension spring device.

[0021] In this embodiment, the outer surface of the nano-ceramic wear-resistant layer 30 is provided with a micro-pit structure, the depth of which is 5-10 μm and the density is 100-200 pits / mm². Lubricating grease can be stored within the micro-pits, forming a dynamic oil film during the reciprocating motion of the spring 10, reducing direct contact between the friction pairs, lowering the wear rate, and inhibiting fretting corrosion.

[0022] In this embodiment, the thickness of the stress buffer layer 20 is 10-20 μm, the thickness of the nano-ceramic wear-resistant layer 30 is 30-50 μm, and the thickness of the hydrophobic layer 40 is 1-3 μm.

[0023] In this embodiment, the stress buffer layer 20 is prepared by laser cladding process to form a metallurgical bonding interface on the surface of the spring 10. The stress buffer layer 20 is a polyurethane elastic layer, which disperses the impact load through elastic deformation.

[0024] In this embodiment, the nano-ceramic wear-resistant layer 30 is deposited on the surface of the stress buffer layer 20 using an plasma spraying (APS) process. During the spraying process, Al2O3-TiO2 composite ceramic powder is heated to a molten state and impacts the surface of the polyurethane elastic layer at high speed. The polyurethane elastic layer has been pre-treated with low-temperature plasma to introduce active groups such as amino groups (-NH2), which react with the metal oxides in the molten ceramic particles at the interface to generate chemical bonds such as Al-N and Ti-OC. At the same time, the incompletely molten ceramic particles are embedded in the polyurethane surface, forming a "pinning effect," enabling the nano-ceramic layer 30 to achieve high-strength bonding through a combination of chemical bonding and micro-mechanical interlocking.

[0025] In this embodiment, the hydrophobic layer 40 is attached to the surface of the nano-ceramic wear-resistant layer (30) using plasma-enhanced chemical vapor deposition (PECVD). In a vacuum environment, fluorine-containing gases (such as CF4) are ionized to generate active fluorine radicals. These radicals chemically bond with the hydroxyl groups (-OH) on the surface of the nano-ceramic wear-resistant layer 30, forming stable CF covalent bonds. Simultaneously, the plasma bombardment generated by the PECVD process can micro-etch the ceramic surface, increasing the anchoring points of the fluorinated polymer molecular chains, thus enabling the hydrophobic layer 40 to adhere firmly through a dual mechanism of chemical bonding and mechanical interlocking. The hydrophobic layer 40 is a fluorinated polymer layer, which achieves self-cleaning due to its low surface energy characteristics, effectively delaying coating failure.

[0026] In this embodiment, the spring 10 includes a body 11, and both ends of the body 11 are provided with hooks 12. The outer diameter of the hooks 12 is 24-26mm, and the distance between the end of the hooks 12 and the body 11 is 2.5-3.5mm.

[0027] In this embodiment, the wire diameter of the spring 10 is 4-6 mm, and the number of spiral turns of the spring 10 is 11-13, so that the spring 10 maintains a stable supporting force within the compression stroke.

[0028] In this embodiment, the spring 10 is made of high-carbon chromium vanadium alloy steel and undergoes a combination of quenching and tempering heat treatment. Tempering eliminates internal stress and improves the fatigue resistance and corrosion resistance of the spring 10.

[0029] In one feasible embodiment, the pitch of the spring 10 decreases non-linearly from the middle to both ends.

[0030] Nonlinear decreasing pitch satisfies the following relationship:

[0031] in:

[0032] Distance from the midpoint of the spring Pitch at the location;

[0033] The reference pitch ranges from 8 to 12 mm.

[0034] This represents the pitch reduction, ranging from 2 to 4 mm.

[0035] L is the characteristic length, and its value ranges from 1 / 4 to 1 / 3 of the total length of the spring.

[0036] Non-linear decreasing pitch can reduce peak shear stress, avoid premature yielding in local areas, and improve the fatigue resistance of spring 10.

[0037] It should be noted that 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 process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-speed train carriage wheel tension spring device, comprising four springs (10), characterized in that, The four springs (10) are symmetrically arranged on both sides of the high-speed rail carriage wheel clamping position to balance the wheel; The surface of the spring (10) is sequentially provided with a stress buffer layer (20), a nano-ceramic wear-resistant layer (30), and a hydrophobic layer (40).

2. The high-speed train carriage pull spring device as described in claim 1, characterized in that, The thickness of the stress buffer layer (20) is 10-20 μm, the thickness of the nano-ceramic wear-resistant layer (30) is 30-50 μm, and the thickness of the hydrophobic layer (40) is 1-3 μm.

3. The high-speed train carriage pull spring device as described in claim 1, characterized in that, The stress buffer layer (20) is a polyurethane elastic layer, and the hydrophobic layer (40) is a fluorinated polymer layer.

4. The high-speed train carriage pull spring device as described in claim 1, characterized in that, The spring (10) includes a body (11), and hooks (12) are provided at both ends of the body (11). The outer diameter of the hooks (12) is 24-26 mm, and the distance between the end of the hooks (12) and the body (11) is 2.5-3.5 mm.

5. The high-speed train carriage pull spring device as described in claim 1, characterized in that, The wire diameter of the spring (10) is 4-6 mm, and the number of spiral turns of the spring (10) is 11-13.

6. The high-speed train carriage pull spring device as described in claim 1, characterized in that, The pitch of the spring (10) decreases non-linearly from the middle to both ends.

7. The high-speed train carriage pull spring device as described in claim 1, characterized in that, The spring (10) is made of high-carbon chromium vanadium alloy steel.

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