The THEORY of MACHINES range enables clear and comprehensive learning of and topics. An understanding of the way in which forces act and react, is fundamental when studying the application of loads on a variety of fixed structures and rotating machinery. The THEORY of MACHINES form a comprehensive range of equipment, equally suitable for demonstration and experimental work.
All the THEORY of MACHINES hardware operates in a standalone mode, with a large number being supplied with Data Acquisition Software.
A sturdy bench top base, with mounting feet and carry handles, incorporates a disc mounted on ball bearings as a crank. The disc has a protractors angle scale so that the rotational angle can be accurately viewed and measured. The crank pin connecting the crank to the disc can be set at different radii on the disc. The connecting rod and the oscillating lever are connected together in different lengths using quick-fit bolts.
A sturdy based plate contains two vertical rods. One supports a pulley wheel over which runs the test cord, whilst the other vertical rod supports a bearing housing onto which all the test bodies are easily attached. To minimize friction, the bearing housing contains two precision bearings.
Three test bodies are supplied: solid cylinder, hollow cylinder and rectangular bar. All mount quickly and easily to the bearing housing. Clamp on weights are provided which easily and quickly attach to the rectangular bar using plastic screws. The radius of gyration of the clamp on weights can be easily adjusted and measured.
The input and output power of the HTM81 is calculated for determining the gear efficiency of two different gear configurations. The HTM81 gear efficiency apparatus has a gearbox which incorporates both spur and worm gears for which the setups can be easily switched between. The motor speed input can be controlled as well as a breaking force or load applied to the output shaft via a braking module. Sensors for speed and force are located on the motor module (input) and the brake module (output).
The machinery diagnostic system can be used to simulate certain types of damage and investigate its effects on the vibration spectrum. The HTM90 base unit permits vibration measurement exercises whereby readings can be taken from different points on the apparatus and at different motor speeds. Users can also complete exercises from purposefully induced faults (measurement of vibration displacement, velocity and acceleration in the time/frequency range). Balancing of rigid rotors and alignment of shafts can also be practiced.
This accessory allows the safe and secure attachment of a large variety of wall mounted experiments from the Hi-Tech Education range of teaching products.