Table, Create, Delete, Add, Rows, Column, Delete, Row, Column, Add, Simple, XY, Pie, Chart. Data, Import, Export. Table, Create, Delete, Add, Rows, Column. FIGURE Epicyclic train dynamometer. direction. The power is transmitted from gear B to D through the intermediate gear C which revolves freely on a pin. This type of dynamometer can be classified as follows: 1. Epicyclic train dynamometer 2. Belt transmission dynamometer 3. Torsion dynamometer. EpicydiC train.
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Since the tension in the tight side of the belt T1 is greater than the tension in the slack side of the belt T2 ,so the total force acting on the pulley C i. If the eye piece is now moved round by an amount equal to the lag of disc B, then the slot in the eye piece will be opposite to the slot in disc B as shown in Figure d and hence the eye piece receives flash of light.
Due to this, the light does not reach to the eye piece as shown epichclic Figure c. It consists of a pulley A called driving pulley which is rigidly fixed tothe shaft of an engine whose power is required to be measured.
A little consideration will show that when the power is being transmitted, then the driving end of the shaft twists through a small angle relative to the driven end of the shaft.
The annular gear is also keyed to the driving shaft and rotates in clockwise direction. R And power transmitted.
Bhaumik patel Nilay patel. To make this website work, we log user data and share it with processors. The pinion revolves freely on a lever.
A helical spring is provided between the nut and the upper block to adjust the pressure on the pulley to control its speed. It consists of one, two or more ropes wound around the flywheel or rim of a pulley fixed rigidly to the shaft of an engine. It consists of two discs A and B fixed on a shaft at a convenient distance apart Each disc has a small radial slot and these two slots are in the same line when no power is transmitted and there is no torque on the shaft.
In order to prevent the slipping of the rope over the flywheel, wooden blocks are placed at intervals around the circumference of the flywheel. The upper end of the ropes is attached to a spring balance while the lower end of the ropes is kept in position by applying a dead weight as shown in Figure.
The frame is pivoted at E and its movement is controlled by two stops S,S. At every revolution of the shaft, a flash of light is projected through the slot in the disc A An eye piece E is fitted behind the disc B on the spicyclic bearing ttain is capable of slight circumferential adjustment. A weight w is placed at the smaller end of the lever in order to keep it in position.
Nirmal Kushwaha Mechanical Deptt. A counter weight is placed at rtain other end of the lever which balances the brake when unloaded. Rotational Dynamics In pure translational motion, all points on an object travel on parallel paths. Two stops S, S are provided to limit the motion of the lever. In order to balance it, a weight W is applied at a distance L from E on the frame as shown in Figure. For a solid shaft of diameter D, the polar moment of inertia for a hollow shaft of external diameter D and internal diameter d, the polar moment of inertia, From the above torsion equation the power transmitted.
Nirmal Kushwaha”— Presentation transcript: Auth with social network: It is thus obvious that the frame causes movement about E in the anticlockwise direction. Share buttons are a little bit lower. Registration Forgot your dynamomerer In the absorption dynamometers, the entire energy or power produced by the engine is absorbed by the friction resistances of the brake and is transformed into heat, during the process of measurement.
The amount of twist depends upon many factors such as torque acting on the shaft T length of the shaft l diameter of the shaft D modulus of rigidity C of the material of the shaft.