Automatic Transmission Gearbox Vehicle In Rail

Importance Introduction of Automatic Transmission Gearbox

The locomotive gearbox housing, as the core protective device of the transmission system, its performance directly determines the reliability of power transmission and the service life of the equipment. This article will systematically analyze the technical characteristics and practical value of this key component from three dimensions: engineering mechanics, materials science, and industrial application.

Performance Parameter of Automatic Transmission Gearbox

1. The Mechanical Properties

The mechanical properties are made by casting vermicular graphite cast iron (CGI450) or high-grade ductile iron (QT600-3), and the Brinell hardness is 180-240HB, and the tensile strength is over 600MPa through normalizing and tempering treatment. The wall thickness of the box body has been optimized through finite element analysis. The key load-bearing parts are designed with a gradient structure of 10-15mm, which can not only withstand the maximum torque load of 32000N·m impact, but also achieve the optimization of quality.

2. The Dynamic Stability

The dynamic stability is equipped with a patented resonant buffer structure, featuring 8 sets of built-in elastic damping modules, which can reduce the 120dB noise caused by gear meshing to below 75 dB. Verified by bench tests, under the working condition where the rotational speed fluctuation range is ±15%, the amplitude is always controlled within 0.05mm.

3.The Environmental Adaptability

The environmental adaptability surface composite coating system consists of 80μm epoxy primer +120μm polyurethane topcoat, and has no rust after 2000 hours of salt spray test. The specially designed flow-directing heat dissipation fins enable the box to maintain a linear expansion coefficient of 0.02mm/m within the temperature range of -40℃ to 150℃, ensuring dimensional stability under extreme climates.

Functions of Automatic Transmission Gearbox

1.The precision sealing system adopts a three-stage dynamic sealing scheme: labyrinth metal sealing ring (radial clearance 0.1-0.15mm) combined with fluororubber axial oil seal, and combined with liquid sealant to form a composite barrier. The measured leakage rate is less than 0.5ml/h, meeting the IP67 protection grade requirements.

2.The intelligent monitoring interface reserves installation positions for the vibration sensor (0- 10 kHz frequency response) and the temperature probe (±0.5℃ accuracy), and is used in conjunction with the 5G communication module to achieve real-time status monitoring. The data acquisition system can capture micron-level deformations and warn of potential faults 200 hours in advance.

3.The modular maintenance design features a unique quick-release inspection cover plate, which uses high-strength titanium alloy fasteners (M24×1.5). Combined with a hydraulic auxiliary device, the box opening operation can be completed within 30 minutes. The interior is equipped with a visual lubricating oil window and an integrated particle counter for real-time monitoring of the oil product status.

Applications of Automatic Transmission Gearbox

1.In the field of rail transit, in the high-speed rail power unit, the new lightweight aluminum matrix composite material shell has successfully reduced weight by 35%, and combined with the aerodynamic design, it has increased the efficiency of the traction system by 12%. The application case of a certain type of intercity EMU shows that the improved shell has extended the maintenance cycle from 120,000 kilometers to 240,000 kilometers.

2.In the field of special vehicles, the gearbox of mining trucks adopts a double-layer armor structure. The outer layer of a 6mm wear-resistant steel plate (HB400) can resist the impact of flying stones, and the inner layer of damping alloy effectively isolates the vibration transmission. It was measured that in an environment with a dust concentration of 200mg/m³, the filtration system could still ensure a cleanliness level of 99.97%.

3.The new energy adaptation solution is an integrated housing developed for hybrid locomotives, reserving space for the installation of motor controllers and high-voltage wiring harness channels, achieving seamless connection between the transmission system and the electric drive unit. The thermal management system adopts a dual-circulation cooling design to keep the gear oil temperature stable within the optimal working range of 85±5℃.

Technological Evolution of Automatic Transmission Gearbox

The current technological evolution focuses on two major directions: functional integration and intelligent operation and maintenance. The latest smart housing launched by a leading manufacturer has integrated a strain sensor array and a self-healing coating system, which can correct microcracks in real time and automatically adjust the internal pressure balance. With the in-depth application of topology optimization algorithms and 3D printing technology, the next generation of products will achieve a 20% breakthrough in lightweight while maintaining structural strength, providing fundamental support for the energy efficiency revolution of rail transit equipment.

Package of Automatic Transmission Gearbox

Polybag+Carton box+Wooden case/Pallet, according to customer’s request

Company Profile

Luoyang Fonyo Heavy Industries Co., Ltd. was founded in 1998, covers an area of 72,600㎡, with more than 300 employees, 32 technicians, including 5 senior engineers, 11 assistant engineers, and 16 technicians. It has been rated as Luoyang Engineering Technology Center, Luoyang Technology R&D Center, and National High-tech Enterprise for many times.
Our production capacity is 30,000 tons per year. Currently, we mainly produce cast steel, cast iron (gray iron, ductile iron, etc.), processing of finished product and component assembly for locomotive,railcar,high-speed trains, mining equipment,wind power,etc.Our products have been exported to Russia, the United States, Germany, Argentina, Japan, France, South Africa,Italy and other countries.

FAQS

Q1: Are you a manufacturer or trading company?
A:We are a manufacturer.Our company was founded in 1998, with nearly 30 years in casting industry, a total area of 72,600㎡, with a factory building area of 51,000㎡.
Q2. What are your main products?
A: We primarily focus on steel casting, iron casting, finished product machining, and component assembly production for locomotive,railcar,high-speed trains, mining equipment,wind power,etc.
Q3: How precision can you produce casting parts?
A: We have the capability of producing casting parts with different casting processes. The production is strictly comply with ISO 9001, ISO 14001 and ISO45001,EN15085, IRIS.
Q4. Can you produce according to the samples?
 Yes, we can produce by your samples or technical drawings. We can build drawings for you after we get your samples too.
Q5: How do you do Quality Control before delivery?
A: Quality inspection is a very important factor to guarantee the quality of steel casting parts. We follow 3 times of inspection during the whole production process. And we will provide material testing report, dimensional testing report, and mechanical properties testing report to our clients before delivery.

It you are interested in any products,please feel free to contact us.
Contact:Cathy Xu
Email:sales@railwaypart.com
Mobile:008615515321683