词条 | dynamometer |
释义 | dynamometer measurement instrument device for measuring mechanical force, or power, transmitted by a rotating shaft. Since power is the product of torque (turning force) and angular speed, all power-measuring dynamometers are essentially torque-measuring devices; the shaft speed is measured separately. Among force-measuring devices are a flexible metallic ring that bends when a force is applied in such a manner as to tend to collapse it—the amount of bending being a measure of the applied force—and a hydraulic “load cell” that measures compressive loads in terms of fluid pressure. Power-measuring dynamometers may be transmission dynamometers or absorption dynamometers. The former utilize devices that measure torque, in terms of the elastic twist of the shaft or of a special torquemeter inserted between sections of the shaft. The torque is produced by the useful load that the prime mover, motor, or machine is carrying. ![]() ![]() |
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