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.
Slide Table Plastic Injection Molding Machine
Slide Table Plastic Injection Molding Machine is a vertical plastic injetion molding machine with single sliding table or double sliding table to work. That is single sliding table Plastic Injection Molding Machine or double sliding table plastic Injection Molding Machine. They are apply to special engineering plastics. Clients can per their requirements to select plastic injection moldingmachine with single sliding table or plastic injection molding machine with double sliding table
Features & Applications:
1. Vertical clamping and vertical injection.
2. Multi-stage temperature control, multi-stage injection pressure and rate,back pressure adjustment, suitable for accurate plastic fittings molding.
3. Slide table design, can offer operation convenience and increase capacity.
4. Optional saving energy motor.
5. Expandable programming, connect with automatic embedded and fetch device, reach to fully automatic.
6. The computer can automatically display the fault, which is convenient for troubleshooting and maintenance.
Slide Table Plastic Injection Molding Machine
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