The interaction between the vehicle and the circuit, the interaction mechanism between the wheel and rail, and the influence of vehicle design on these mechanisms. The relationship between wheelsets and line changes, the vertical and horizontal forces between wheels and rails and the relationship between the lines and vehicles, the impact of vehicle suspension systems, and the influence of wheel/rail shape design are studied in detail. Wheel-rail contact characteristics This section mainly studies on wheel-rail contact mechanics, wheel/rail materials, wheel/rail damage mechanisms and causes, rolling contact fatigue defects, rail surface wave wear, and plastic flow.
Application Examples This section describes the research and application of Australia's BHP in the transportation of ore ports, Canadian Pacific Railroad Transportation Co. and the United States TTCI company in the coal-only line on the wheel-rail contact parts. High transportation density and large axle weights are very damaging to the wheel and rail, which is mainly manifested in wheel-rail contact fatigue damage and peeling, which greatly reduces the wheel and rail life. In this case, only proper technical measures can be used to ensure the normal operation of the transportation.
In order to maximize the life of the wheel and rail, the Hunter area took two major measures: one is wheel-rail lubrication; the other is maintenance and grinding of rails. The main methods used are: (1) the use of high-strength (mainly heat-treated) wheel and rail materials (2) appropriate lubrication of the rim and rail head surface. This method is mainly used for small radius curves (radius is less than 700m ~ 800m ), can reduce wear 50%, and reduce fuel consumption and reduce noise. To ensure the lubrication effect, a roadside lubrication system can be used. (3) Improvement of wheel/rail profile By designing a suitable wheel/rail profile, the curve passing performance can be improved, and the wheel and rail lateral force and wear can be reduced. And reduce the possibility of reducing derailment, reducing the large number of rim lubrication. Improve wheel-rail contact stress and creep rate. It can reduce the severity of the contact fatigue effect, improve the dynamic performance, reduce the vehicle's meandering, improve the bearing characteristics of the rails, and reduce the cross-sectional stress.
SZL series chain grate boiler
Our company SZL type boiler is a double-drum water tube assembly chain grate boiler. The boiler proper has an upper drum and a bottom drum longitudinally arranged along the boiler center. The front of the upper drum and two sides water wall tubes constitute the boiler hearth radiation heating surface, and the tubes between the rear of the upper drum and the bottom drum constitute the convection heating surface. The economizer is arranged on the rear of the boiler,part of heat from high temperature exhaust gas generated by burning was absorbed by economizer, then the exhaust gas go through the cooling chamber,exhaust gas enters the convection heating surface to transfer heat power again, and through economizer,dust collector, finally draught by ID fan to Chimney,discharges into the atmosphere.
Core Technology:
1. Longitudinally arranged double drum
2. Airtight and uniform-pressure wind room
3. Customized combustion device
4. "α" type flame combustion
5. High quality aluminum silicate insulation
6. Built-in dust cleaning
7. Easy operation control system
Biomass Fired Steam Boiler,Biomass Steam Boiler,Industrial Biomass Steam Boiler
Henan Yuanda Boiler Co., Ltd. , https://www.industrysteamboiler.com