대차 is one of the most important components of a locomotive. 구조가 합리적인지 여부는 실행 품질에 직접적인 영향을 미칩니다., 기관차의 출력 성능 및 주행 안전성. The rapid running of high-speed trains around the world and the rapid development of modern urban rail vehicles are closely related to the progress and development of bogie technology. It is no exaggeration to say that bogie technology is one of the core technologies for the survival and development of “modern locomotives driven by wheel-rail contact.” Due to the differences in the history and background of railway development in various countries, as well as the differences in technical conditions, the structural types of high-speed bogies developed by various countries are also quite different. 하지만, the consensus on design principles and practical experience has led to many similarities in the form of high-speed bogies, such as the use of an air spring suspension system, wear-free axle box elastic positioning, and a composite brake system based on disc brakes…

Design principles of EMU bogies

(1) Use a highly flexible spring suspension system to obtain good vibration performance. This highly flexible air spring can show its superiority at speeds below 300km/h.

(2) Use a high-strength, lightweight bogie structure to reduce the dynamic effect between the wheel and the rail.

(3) Various measures that can effectively suppress bogie snaking and increase the critical speed of bogie snaking are adopted.

(4) The drive device adopts a simple, 현실적인, reliable and mature structure and minimizes the unsprung mass and the sprung mass to improve the action force between the wheel and the rail and improve the stability of high-speed operation.

(5) The basic braking device adopts a composite braking system.

The tasks of the EMU bogie bogie

(1) 내하중. Bear the weight of all parts above the frame (including the car body, 액자, power unit auxiliary devices, 등.) and distribute the axle weight evenly.

(2) Traction (power bogie). Ensure the necessary wheel-rail adhesion and transfer the wheel traction generated at the wheel-rail contact to the frame and coupler to pull the train forward.

(3) Buffering. Alleviate the impact of track unevenness on the vehicle and ensure that the vehicle has good running smoothness and stability.

(4) Guidance. Ensure that the vehicle passes the curve smoothly.

(5) Braking. Generate the necessary braking force to slow down or stop the vehicle within the specified distance. EMU bogies The main technical features of EMU bogies are bolster-less bogies, high-speed stability and curve passing performance; lightweight structure; all wheels are equipped with mechanical brake discs; EMU bogies are equipped with small induction motors; trailer bogies are equipped with mechanical or eddy current brake discs on the axles; all wheels are equipped with tread cleaning devices, and electronic anti-skid devices have achieved reduced driving noise and improved wheel-rail adhesion. Axle disc brake device Tread cleaner Wheel disc brake device EMU bogies

Basic requirements for high-speed bogies

Good running stability and comfort (dynamics)

Simple structure and lightweight (신뢰할 수 있음)

Convenient and excellent maintenance

Safety against derailment (dynamics)

Classification by axle box positioning method

현재, the differences in the structural types of most EMU bogies are mainly reflected in the differences in axle box positioning methods. The mechanism that constrains the relative movement between the wheelset and the frame is called the axle box positioning device. The basic requirements for the axle box positioning device are: it should have appropriate elastic positioning stiffness values in the longitudinal and transverse directions, and its value is the main parameter of the device; its structural form should be able to ensure good elastic positioning, stable performance, simple and reliable structure, no or little wear, easy manufacturing and maintenance, 경량, 저렴한 비용, 등. EMU 대차

Tie rod type (axle beam type) 포지셔닝

The two ends of the tie rod are pinned to the frame and the axle box, 각기. The tie rod can allow the axle box and the frame to have a large relative displacement in the vertical direction. The rubber pads and sleeves in the tie rod limit the lateral and longitudinal relative displacement between the axle box and the frame, 각기, realizing the elastic positioning of the EMU bogie 2. Pull plate type (support plate) positioning A thin positioning pull plate made of special spring steel is connected to the axle box at one end and connected to the frame through a rubber node at the other end. The different stiffness of the pull plate in the longitudinal and transverse directions is used to constrain the relative movement of the frame and the axle box to achieve elastic positioning.

EMU 대차

Characteristics of high-speed EMU bogie: Good and excellent maintainability Bogie structure that is easy to assemble and disassemble Two-part axle box structure that is convenient for wheelset replacement No sliding parts, can be maintenance-free for a long time EMU bogie Simple structure and lightweight swing arm axle box support positioning device No rocker frame and car body support device Single-link traction device Lightweight and strength and reliability combined bogie frame EMU bogie

Any railway locomotive vehicle bogie must complete the following tasks:

(1) 내하중. Bear the weight of all parts above the frame (including the car body, 액자, power unit auxiliary devices, 등.), and evenly distribute the axle weight.

(2) Traction (power bogie). Ensure the necessary wheel-rail adhesion and transfer the wheel circumference traction generated at the wheel-rail contact point to the frame and coupler to pull the train forward.

(3) Buffering. Alleviate the impact of uneven lines on the vehicle and ensure that the vehicle has good running stability and stability.

(4) Guidance. Ensure that the vehicle passes through the curve smoothly.

(5) Braking. Generate the necessary braking force to slow down or stop the vehicle within the specified distance.

물론, the non-powered bogie does not generate a driving force. It is pulled by others so that it can have no traction (task).

Technical performance requirements of EMU bogies

(1) The mutual dynamic effect between the wheel and the rail is significantly enhanced, which directly affects the smoothness and safety of the vehicle operation and also has an adverse effect on the strength and stability of the track line.

(2) For lateral motion stability, higher requirements are put forward. Attention must be paid to the occurrence and intensification of bogie instability to prevent violent snaking movement.

(3) When passing through a curve at high speed, the lateral dynamic effect increases. It is necessary to prevent derailment and overturning and prevent the expansion of the track gauge and lateral movement of the track row.

(4) The increase in movement speed increases the frequency of vibration caused by track unevenness, which intensifies the frequency of vehicle disturbance. It will affect the smoothness of vehicle movement.

(5) Attention must be paid to the environmental pollution caused by noise generated during high-speed operation

공급자

뤄양포뇨중공업(Luoyang Fonyo Heavy Industries), 주식회사,1998년에 설립된 캐스트 철도 부품 제조업체입니다. 저희 공장 부지는 72,600㎡입니다., 이상으로 300 직원, 32 기술자, 포함 5 수석 엔지니어, 11 보조 엔지니어, 그리고 16 기술자. 우리의 생산 능력은 30,000 연간 톤. 현재, 우리는 주로 주조물을 생산하고 있습니다, 가공, 기관차 조립 및 조립,철도 차량,고속 열차, 광산 장비,풍력,etc.Our 제품은 러시아에 수출되었습니다, 미국, 독일, 아르헨티나, 일본, 프랑스, 남아프리카,이탈리아 및 기타 국가.
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