The earliest preserved gears in Europe were found in the Antikythera mechanisman example of a very early and intricate geared device, designed to calculate astronomical positions. Its time of construction is now estimated between and BC.
The method is based on the equations that describe each epicyclic gear mechanism and rules that assign appropriate codes Epicyclic gear train experiment the external elements.
The method emphasizes how power flows are transmitted through the epicyclic gears. Analysis of an epicyclic gear box is performed to illustrate the proposed method. Gear trains of the type shown in Figures 1, 3, 4 and 5 are called epicyclic gear trains or planetary gear trains. In these gear trains, one or more gears are carried on a rotating planet carrier rather than on a shaft that rotates on a fixed axis.
Several types of gear trains may be shifted manually to obtain greater or lesser values of speed reduction. The shifting process, however, is difficult to accomplish automatically with gears that rotate about fixed centers.
On the other hand, epicyclic gear trains are readily adapted to automatic control. Some epicyclic gear trains are designed to change velocity ratios simply by using electrically or hydraulically operated band brakes to keep one or more of the gears stationary.
Other epicyclic gear trains operating with fixed velocity ratios are selected for their compact design and high efficiency. A simple epicyclic gear train consists of a sun gear S in Figure 1. An epicyclic gear train and its associated terminology The general expressions pertaining to the gear train are given below: For a gear train Fig.
The sun gear, ring gear and planet carrier all rotate about the same axis. With the existence of Mfriction, The actual output torque is smaller. The smallest To to balance the gear train will be used to determine the system's efficiency. The efficiency can only be determined experimentally.
Calculation of velocity ratio can be performed by either the formula method or the tabular method. This ratio can also be experimentally obtained. In this experiment the gear ratio is initially calculated using the formula involving the number of teeth. The angular velocity ratios and the torque ratios of the two gear units are calculated experimentally.
The procedure is described below: To calculate the angular velocity of the 1 nd lock the 2 gear unit using the lock pin. Rotate the input shaft one full turn clockwise as viewed from the input shaft end and observe the sense and magnitude of rotation of the output shaft as viewed from in input shaft end.
· MENG L Lab Gear Drives Page 1 of 8 8/16/13 Introduction: Gear drives are used to convert the speed of a power source, or driver, to the speed required by the torosgazete.com also trade speed for torque in the inverse of the gear torosgazete.com~jruff/L/Labpdf.
Epicyclic Gear Train - Free download as Powerpoint Presentation .ppt), PDF File .pdf), Text File .txt) or view presentation slides online. Scribd is the world's largest social reading and publishing torosgazete.com://torosgazete.com · A gear train is a mechanical system formed by mounting gears on a frame so the teeth of the gears engage..
Gear teeth are designed to ensure the pitch circles of engaging gears roll on each other without slipping, providing a smooth transmission of rotation from one gear to the torosgazete.comical advantage · Analysis using virtual work · Gear trains with two gearstorosgazete.com · Epicyclic gear train, contact stress, optimisation, Taguchi design of experiments, analysis of variance, product design and development Introduction The Taguchi design of experiments is an effective method torosgazete.com Using the gear train apparatus provided, the next step of the experiment is to construct a simple gear train using any two of the four gears.
Once they are secured with wingnuts and there is good meshing (using spacers and washers) between the gear and the pinion on the apparatus, the gear is rotated for one revolution anti-clockwise.
Epicyclic Gear Train Experiment Essay Lecturer: Experiment 1: Epicyclic Gear Train 1. Objectives Theory Introduction A gear train is two or more gear working together by meshing their teeth and turning each other in a system to generate power and speed.
It reduces speed and increases torosgazete.com://torosgazete.com