機関車の中核耐荷重コンポーネントとしての鉄道車軸ハウジング

Introduction of Railway Axle Housing

The axle housing ( 軸箱) of the rail vehicle, as the core load-bearing component of the bogie system of the rail vehicle, its design and material selection are directly related to the safety, stability and service life of the train operation.

Material and Process Features of Modern Railway Axle Housing

The axle box is made with high-strength alloy cast steel (such as ZG25MnCrNiMo) and nodular cast iron (QT500-7), two kinds of base material, supplemented by differential heat treatment process to meet the demand of different working conditions. その中で, cast steel structures are widely used in heavy-duty freight transportation and high-speed EMU fields due to their excellent impact toughness (impact energy at room temperature ≥35J) and tensile strength (≧600MPa). During the casting process of the box body, resin sand precision forming technology is adopted, combined with 3D scanning reverse detection, to ensure that the dimensional accuracy of the complex inner cavity structure is controlled within ±0.3mm.

In view of the development trend of lightweight, new aluminum alloy axle box body (AlSi7Mg – T6) has gradually been pilot applied in urban rail vehicles. The aluminum alloy box formed by the vacuum die-casting process is 40% lighter than the traditional cast steel part. Combined with anodic oxidation surface treatment (film thickness 20-25μm), the corrosion resistance is improved by more than three times while maintaining a yield strength of 450MPa. It is worth noting that in an extremely low-temperature environment (-40℃), the material needs to pass the Charpy V-notch impact test to verify its low-temperature toughness.

 The Structural Design and Technical Characteristics of Railway Axle Housing

Topology optimization design was used to construct variable cross-section box structure, key bearing area wall thickness of 25 mm, and the stress section thinning to 12 mm to achieve maximum stiffness weight ratio. Finite element analysis shows that the maximum stress point of this structure under a longitudinal impact load of 300kN is 20% lower than the allowable value of the material.

(1)Composite seal system: configuration labyrinth mechanical seal with double protection, fluorine rubber lip seal with the compression type sealing ring (compression ratio 18 + / – 2%), which can effectively cut off grade PM10 level fine dust. The IP67 protection level ensures a maintenance-free cycle of 500,000 kilometers for the bearing lubrication system.

(2)Intelligent monitoring integration: Reserve an embedded sensor installation base, supporting real-time monitoring of multiple parameters such as temperature (-40 to 150℃), 振動 (0.5 to 10kHz frequency response), and stress (±2000με range). The data sampling rate can reach up to 10kHz, providing a technical foundation for predictive maintenance.

Function Implementation and System Integration of Railway Axle Housing

As the wheel/rail system of “mechanical conversion hubs” bears the multi-dimensional function bearing axle box body: static, dynamic load transfer: The vertical direction bears the self-weight of the bogie (代表値 8-12 トン) and the dynamic wheel-rail impact force (peak can reach three times the axle weight), as well as the centrifugal force when the lateral transmission curve passes through (under the maximum acceleration condition of 0.3g).

(1)Motion constraint control: The longitudinal/lateral displacement elastic constraint of the wheelset is achieved through the positioning node (rubber joint stiffness 25±3kN/mm) to ensure stability loss at the critical speed.

(2)Thermal management center: The heat dissipation fin design of the box body keeps the temperature rise of the bearing within ΔT≤35℃ (under a continuous working condition of 80km/h) and is combined with thermal grease (3.5W/m·K) to enhance the heat conduction efficiency.

(3)Fault isolation barrier: When the binding of the bearings, the mechanical weak link of the preset of the (shear pin) directional rupture, prevent expanding hot shaft failure as EN15085 welding system certification and ISO/TS22163 the in-depth implementation of rail transit industry standards, Modern axle box manufacturing has established a full-process quality control system covering material metallurgy (cleanliness control [○]≤30ppm), precision casting (CT8 grade accuracy), and intelligent detection (industrial CT defect identification accuracy 0.2mm).

Future Development of Railway Axle Hosuing

将来, with the maturation of metal matrix composites (SiC particle-reinforced aluminum matrix composites) and 3D printed conformal cooling channel technology, the new generation of axle box bodies will achieve breakthroughs in lightweight (with a target weight reduction of 50%) and functional integration.

鉄道車軸ボックスのパッケージ

ポリ袋+カートンボックス+木製ケース/パレット, 顧客の要求に応じて

会社概要

洛陽豊洋重工業株式会社, 株式会社. に設立されました 1998, 面積72,600㎡, 以上の 300 従業員, 32 技術者, 含む 5 シニアエンジニア, 11 アシスタントエンジニア, そして 16 技術者. 洛陽工程技術センターとして評価されています, 洛陽テクノロジーR&Dセンター, 国家ハイテク企業と何度も.
弊社の生産能力は 30,000 年間トン. 現在, 私たちは主に鋳鋼を生産しています, 鋳鉄 (ねずみ鉄, ダクタイル鋳鉄, 等), 完成品の加工と部品の組み立て。製品はロシアに輸出されています, 米国, ドイツ, アルゼンチン, 日本, フランス, 南アフリカ,イタリアとその他の国.

よくある質問

Q1: メーカーですか、それとも商社ですか?
あ:私たちはメーカーです. 当社は年に設立されました。 1998, 鋳造業界で約30年の実績, 総面積72,600㎡, 工場建屋面積51,000㎡.
第2四半期. 主な製品は何ですか?
あ: 当社は主に鋼鋳造に注力しています, 鉄鋳物, 完成品加工, および部品組立生産.
Q3: 鋳造部品をどの程度の精度で製造できるか?
あ: 当社はさまざまな鋳造プロセスで鋳造部品を製造する能力を持っています. 生産はISOに厳密に準拠しています 9001, ISO 14001 ISO45001、EN15085, 虹彩.
Q4. サンプル通りに生産してもらえますか?
 はい, あなたのサンプルまたは技術図面から生産できます. サンプルを入手した後、図面を作成することもできます.
Q5: 納品前の品質管理はどのように行っていますか?
あ: 品質検査は鋼鋳造部品の品質を保証する非常に重要な要素です. 私たちはフォローします 3 生産プロセス全体における検査回数. 材料試験レポートを提供します, 寸法試験レポート, 納品前に顧客に報告する機械的特性試験レポート.

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