3 Piece Forged Wheels Wheel Group Diameter And Track
3 Piece forged Wheels Wheel group diameter and track
Wheel group analysis of the wheel which have the role:
Perhaps the greatest role of the wheel is that people can quickly move objects that are much larger than their own weight.
The most common use of pottery wheels on pottery wheels is transportation. Before the invention of the wheel, the ancients should take the slips to carry heavy objects. The simplest pry is a slope, and some of the more complex will be under the weight of a few pad and bar - the ancient Egyptians is in this way the huge stone piled into the pyramid. Although the ancient Egyptians should be inspired by the rolling and the invention of the wheel, but the earliest use of the wheel is not the ancient Egyptians.
The Relationship between the Diameter of the Wheel Group and the Track
The relationship between the diameter of the wheel group and the track. In addition to the small and medium-sized bridge crane car running sometimes use square steel as the track and set the tower crane crane running triangular section of the square arm of the square steel chord as the track, the line contact, the general use of the top crane overhead The rails. The contact stress condition of the wheel group and the track is the point contact of the roller-roller pair, and the contact stress is quite high as shown in Fig. How to correctly select the wheel material and heat treatment; how to correctly handle the relationship between the diameter of the wheel group and the track type, so that it has enough carrying capacity, and more economical; how to calculate its carrying capacity, but this paper is trying to solve The problem.
1, driving wheel group diameter
The tread surface of the crane wheel should be quenched and have sufficient hardened depth. The failure mode is usually a certain number of operating times due to contact stress caused by fatigue pitting and wear. Only quenched and tempered without taut wheel tread often lead to plastic deformation or abrupt wear, it can only be used for small wheel pressure and the work is not frequent occasions. The surface of the hardened but hardened depth of the wheel often lead to tread crushing, peeling, it is more desirable.
In order to improve the carrying capacity of the wheel group, the wheels of the material should be sufficient strength, but slightly lower than the rail. In order to improve its hardenability and comprehensive performance, commonly used carbon forged steel or medium carbon alloy cast steel, without surface hardening before the tensile strength should generally ○ b ≥ 600N / mm2.
The diameter of the wheel should be the preferred value in the R10 series, such as 250,315,400,500,630,800,1000 and 1250, and the common range is 400-1000. For the convenience of selection, insert R20 between 630-1000 Series of 710 and 900 two specifications, but should be given priority in the R10 series of values.