The jet fan thrust measuring device can basically be divided into two structural types: a hanging structural device and a supporting structural device. The suspended structure requires that the suspension components must be accurately held perpendicular and parallel to the vertical plane passing through the axis of the fan; the supported structure requires structural precision and the level of the support table. The two methods of thrust measurement are measured by calibration weights, spring scales or pressure sensors.
(l) Suspension structure device: The jet fan is suspended on a fixed frame or a movable fixed frame, which must allow free flow of air, especially at the suction port of the fan. The fixed frame around the fan provides a reference point for the fan test rig at rest, to provide support for the pulley system with the calibration weight, spring balance, or to provide a reaction point for the installation of the thrust sensor.
The length of the suspension component is at least 1 times the diameter of the fan (ie 10 feet). During the test, the suspension device should be accurately vertical so that the fan is in the range of the stationary taxi 2 to ensure the accuracy of the thrust measurement. The thrust is recorded with a calibration weight or spring balance. When using a spring balance, it will rely on the pulley support and its mass should be added to the measured thrust value.
(2) Supporting structure device: The jet fan is supported on a fixed frame by a low-friction linear bearing or a spring piece. The jet fan can move freely in two directions within a certain range. The test bench should be carefully adjusted in all directions before the test. Horizontal, so that the force required to move the fan along the axis in two directions is equal, and the test bench should be horizontal. The load of the measuring system is adjusted during the test so that the movement is not restricted, and the thrust measurement accuracy is ensured.
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Pet bowl, Maidao injection molding machine provides customers with a more environmentally friendly injection molding machine production program.
Different from the injection molding machine with variable pump and fixed pump, the energy-saving injection molding machine uses the servo drive to realize the motor stops working when the machine does not move. Every time a different action is made, the corresponding power is used to provide power. It is not as good as the machine does not move. The servo motor will also stop completely.
The molding cycle is shorter and the efficiency
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3. The energy consumption of the motor is
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power can reach more than 90%, which saves energy.
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