scholarly journals The Influence of Friction Blocks Connection Configuration on High-speed Railway Brake Systems Performance

2021 ◽  
Author(s):  
Jiabao Yin ◽  
Yuanke Wu ◽  
Chun Lu ◽  
Wei Chen ◽  
Jiliang Mo ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
High Speed ◽  
Brake System ◽  
Heat Distribution ◽  
High Speed Railway ◽  
Braking System ◽  
Pressure Concentration ◽  
Interface Contact ◽  
Friction Induced Vibration ◽  
Vibration Noise

Abstract The influence of friction blocks connection configuration on the interfacial tribology behavior and FIVN (friction-induced vibration and noise) of high-speed railway braking system is systematically investigated with a scaled brake test bench. The potential relationship among interface contact status, friction, wear, pressure distribution, heat distribution and vibration noise of the system is studied under dragging test condition. The results indicate that the connection configuration of the friction blocks has a significant impact on systematic interfacial tribology behavior, heat distribution and vibration noise. A floating connection mode can suppress the vibration noise of brake system. The interfacial heat distribution and systematic vibration noise are quite relevant with the contact status, interfacial wear and pressure distribution. The increase of interfacial wear will lead to an expansion of pressure concentration area and an aggravation of vibration noise. The result of this research is helpful for a further design optimization and noise reduction of railway brake system.

scholarly journals Innovative braking system for high-speed 80-foot platform

2021 ◽  
Vol 80 (6) ◽  
pp. 343-350
Author(s):  
V. A. Nikonov ◽  
V. F. Zubkov ◽  
M. N. Tsibizov ◽  
I. V. Nazarov ◽  
D. V. Gorskiy
Keyword(s):  
High Speed ◽  
Pressure Sensors ◽  
Brake System ◽  
Modern Concept ◽  
Automatic Regulation ◽  
Brake Pads ◽  
Braking System ◽  
Digitally Controlled ◽  
The Creation ◽  
Technical Solutions

The article discusses technical solutions for the creation of an effective design of a brake system for high-speed longwheelbase platforms intended for the transport of containers, as well as for the development of a fundamentally new brake equipment for the pneumatic, electro-pneumatic and mechanical parts of the brake system. Modular braking equipment for the pneumatic and electro-pneumatic parts of the high-speed platform braking system, compactly located under the platform frame, provides technical compatibility when controlling platform brakes as part of not only a high-speed freight train of permanent formation, but also in trains for other purposes, regardless of the location of the platform in the composition of the train. The performance of the braking equipment of each platform in motion and in the parking lot is monitored using pressure sensors and an electronic unit that processes the readings of the sensors and transmits information to the locomotive via one of the wire lines of the electro-pneumatic brake. The brake rigging used on the high-speed platform is arranged in the design of three-axle bogies and provides doublesided pressing on the wheels with typical composite brake pads, automatic regulation and maintenance of the standard clearances between brake pads and wheels. The proposed promising technical solutions make it possible to continuously diagnose the parameters of the brakes of each platform as part of a permanent train, display them on the locomotive monitor and transmit them to the dispatch centers of the Russian Railways infrastructure. Thanks to this, the braking effciency can be increased and the safety of train traffc can be ensured while increasing the permissible travel speeds. In the modern concept of digitalization of the infrastructure of Russian Railways, which provides for the creation in 2021–2025 (and in the future until 2030) of cars in which intelligent technologies should be applied, the braking system of a high-speed platform can be considered as the basis for creating a digitally controlled train — one of the key elements of the digital railway.

Impact analysis of contact symmetrical caliper structure on brake squeal

2020 ◽  
pp. 107754632095951
Author(s):  
Gongyu Pan ◽  
Xiaoman Zhang ◽  
Peng Liu ◽  
Lin Chen
Keyword(s):  
Pressure Distribution ◽  
Impact Analysis ◽  
Element Model ◽  
Brake System ◽  
Design Stage ◽  
Brake Squeal ◽  
Braking System ◽  
Brake Pressure ◽  
Squeal Noise ◽  
The Finite Element Model

The brake squeal of automobiles has become one of the most annoying issues for passengers. Hence, it is essential to suppress the noise from the design stage of the braking system. In this article, the method for reducing squeal noise is explored based on the finite element model of the brake system. Studies on this model show that the structural deficiency of the brake caliper may cause the instability of the braking system and then cause squeal noise. Thus, the brake caliper is optimized to achieve a symmetrical contact pressure distribution on the inner and outer sides of the disc surface. The effectiveness of this method is analyzed by ANSYS/workbench software and verified in bench tests and road tests. The results show that the symmetrical caliper structure can make the brake pressure distribution more reasonable and the brake system more stable. Finally, it has reduced the noise incidence from 19.27% to 3.63%, which provides an effective method of reducing brake squeal noise.

Study on Control of Hydraulic Disc Brake System Based on PWM High Speed On/Off Valve

2011 ◽  
Vol 69 ◽  
pp. 28-32 ◽  
Author(s):  
Yu Wang ◽  
Li Lin
Keyword(s):  
High Speed ◽  
Oil Field ◽  
Brake System ◽  
Disc Brake ◽  
Constant Weight ◽  
Braking Performance ◽  
Braking System ◽  
Drilling System ◽  
Automation Control ◽  
Control Technologies

With the development of oil exploration and electronics technology, the automation control technologies of hydraulic disc brake system (HDBS) have become more and more widely used. After analysis the braking performance of HDBS, The optimizing schemes for hydraulic disc brake, such as PWM high speed on/off valve and pressure switch are used in the constant weight auto-drilling system. It has been tested successfully both on the integrated braking facility in lab and in the oil field. And it proved that the PWM valve have great prospects on the braking system.

Model construction and analysis of ride comfort for high-speed railway seat cushions

Work ◽  
2021 ◽  
Vol 68 (s1) ◽  
pp. S223-S229
Author(s):  
Zhi Tang ◽  
Zhihui Liu ◽  
Yingte Tang ◽  
Jinzhen Dou ◽  
Chang Xu ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
High Speed ◽  
Ride Comfort ◽  
Contact Point ◽  
Subjective Evaluation ◽  
Surface Shape ◽  
High Speed Railway ◽  
Seat Cushions ◽  
Distribution Index ◽  
The One

BACKGROUND: More and more people choose to travel by high-speed railway. The seats in these vehicles are an important contact point and comfort of the seat cushions needs attention. OBJECTIVE: The aim of this study is to choose among three seat cushions, the one that creates most comfort for a high-speed train. METHODS: Twelve healthy volunteers were selected to participate in the experiment. Three different surface shape models of high-speed railway seat cushions were used. The Seat Pressure Distribution Index (SPD%) was calculated and analysed. A 7-point Likert scale questionnaire was applied for subjective evaluation. RESULTS AND CONCLUSION: The evaluation is based on subjective and objective data. The results showed that the front protruding cushion made the pressure distribution more even, while the flat cushion had the smallest SPD% and the static pressure was most evenly distributed. This knowledge was beneficial for the design of comfortable high-speed railway seat cushions.

A Museum Filled with Past, Present and Future in High Speed Railway^|^mdash;SCMAGLEV and Railway Park^|^mdash;

2012 ◽  
Vol 132 (10) ◽  
pp. 673-676
Author(s):  
Takaharu TAKESHITA ◽  
Wataru KITAGAWA ◽  
Inami ASAI ◽  
Hidehiko NAKAZAWA ◽  
Yusuke FURUHASHI
Keyword(s):  
High Speed ◽  
High Speed Railway
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