One of the devices which are most often used today in various mechanisms is the reducer. It represents development of the idea of the lever and serves for transfer of the moment between the rotating pulleys. The key parameter characterizing a concrete reducer is the transfer number. It is possible to define it by commission of calculations on the basis of data on type and parameters of steps of a reducer.
It is required to you
- - knowledge of parameters of transfers of a reducer.
Instruction
1. Define transfer number of the reducer consisting of one gear transmission. The rotating moment is transferred in devices of this kind from the leading shaft conducted by means of interaction of the teeths a gear wheel established on them. Gear wheels can be both cylindrical, and conic - in this case it is not important. In the beginning define quantity of teeths of a gear wheel of the leading shaft by simple calculation. Then do the same operation for a gear wheel of the shaft conducted. Divide the second value into the first. It will also be required transfer number of a reducer.
2. When calculating transfer number of the reducer executed on the basis of chain transfer act similar to the first step. Count number of teeths of the leading and conducted asterisks, and then divide the second value into the first.
3. For assessment of transfer number of a reducer on the belt drive it is necessary to know radiuses (or diameters) its conducting and conducted pulleys. Pay attention that it have to be values of radiuses of circles on which there passes an internal part of a belt at its contact with pulleys. Therefore if the pulley is executed in the form of a roller with a groove for deduction of a belt, it is necessary to measure the radius or diameter of its internal part. In this case for calculation of transfer number it is enough to divide the radius of the conducted pulley into the leader's radius.
4. In reducers on the basis of the worm gear the leading pulley always is on what the worm is located, and conducted - on which there is a worm wheel. For one turn of a worm the wheel (gear wheel) turns on the quantity of teeths equal to number of calling of a worm (in the simplest case it is unit). Therefore the transfer number of such reducer is calculated by simple division of quantity of teeths of a worm wheel into number of calling of a worm.
5. Define transfer number of the reducer made of several transfers by consecutive multiplication of transfer numbers of its separate steps.