What is the purpose of coning of wheels?
To keep the train in its central position of the rails, coning does not allow any sidewise movement on a straight track. to allow the wheels to move different distances on a curved track and thereby reduce wear and tear.
What is coning of wheels and its advantages?
Advantages of Coning of Wheel Reduces wear and tear of wheel flanges. Damage is caused because of the friction action of rims with inner faces of the rail top. It gives an option of lateral drift of the hinge with its wheels. It prevents, to some extent, the slipping of the wheels.
What do you understand by coning of wheels and creep of rails?
Coning of Wheels in Railways • The Surface of wheels are made in cone shape at an inclination of 1 in 20, and the same slope is provided in the rails (see fig), this is known as coning of wheels. Creep is common to all railways and its value varies from almost nothing to about 6 inches or 16cm.
What are the disadvantages of coning of wheel?
Disadvantages of conning
- Pressure on the outer rail is more while on inner rail it is less.
- Due to the centrifugal force, the horizontal components tend to turn the rail out and gauge has widening tendency.
- If no base plate is used under the voids sleepers under the edge of the rail are damaged.
Why is the foot of rails made wide?
Why is the foot made wide? Clarification: The foot should be made wide enough to provide stability to the rail. It should resist the forces applied and should not be overturned.
Why is tilting of rails done?
Rails are tilted inward at an angle of 1 in 20 to reduce wear and tear on the rails as well as on the tread of the wheels. Rails are tilted inward at an angle of 1 in 20 to reduce wear and tear on the rails as well as on the tread of the wheels.
What is Railwear?
The separation or cutting of steel rail due to friction or abnormal heavy load is called steel rail wear.
What are the causes of creep?
Some of the minor causes of creep in rail are below:
- Rails not properly fixed to sleepers.
- Bad drainage of ballast.
- Bad quality of sleepers used.
- Improper consolidation of formation bed.
- Gauge fixed too tight or too slack.
- Rails fixed too tight to carry the traffic.
Which crossing are required for changing the direction of engines?
A triangle (Fig. 15.16) is mostly provided in terminal yards for changing the direction of an engine. Turntables are also used for this purpose, but are costly, cumbersome, and present a lot of problems in maintenance. Normally, a triangle is provided if enough land is available.
Is outer wheel travel longer than inner wheel on curves?
On curves, the outer wheel has to travel lesser distance than the inner wheel.
Why does bull headed rails have more metal in the head?
Why does Bull headed rails have more metal in the head? Clarification: Huge amount of load on the rail causes damage to it. For better endurance and longer life the Bull headed rails have more metal in the head.
What does railroad weight per foot?
Most railroad track used for main line trains in the United States weighs at least 130 pounds per yard, or 43.33 pounds per foot. Railroad track weight ranges from 75 pounds per yard (25 pounds per foot) to 175 pounds per yard (58.33 pounds per foot).
What do you call the coning of wheels?
Coning of Wheel The rim or flanges of the wheels are never made flat but they are in the shape of a cone with a slope of about 1 to 20. This is known as coning of wheels. The coning of wheels is manly done to maintain the vehicle in the central position with respect to the track.
What are the advantages of Coning of wheels?
While on the curved path, the outer wheel has to cover a larger distance than the inner wheel. Thus, the portions of wheels running on track have different diameters which help in the smooth running of wheels. We have seen what is coning of _wheel through some easy read bullet points.
How is the tread of a wheel coned?
Normally, the tread of of wheels is dead center of the head of the rail; as the wheel is coned to keep it in this central position automatically. These wheels are coned at a slope of 1 in 20.
What is the conning of wheels on a curve?
Therefore, the slip is about 0.029 m per degree of the central angle. Conning of wheels on curves is not of much use as the leading axle if due to centrifugal force moves towards the outer rail rear axle.