DEVICE FOR INVESTIGATING THIXOTROPIC PROPERTIES OF MATERIALS Russian patent published in 1994 - IPC

FIELD: instrumentation engineering. SUBSTANCE: base carries a rack on which a main rocker is hinged so that one arm has a system for balancing movable parts of the device, which is made like a horizontal threaded regulator provided with a weight nut, and bears a measuring plate suspended so that it is submerged in liquid to be investigated. From the opposite arm of the main rocker on a non-extensible thread is suspended a smaller rocker, having one arm coupled by a non-extensible thread with a solenoid core and other arm linked kinematically by a non-extensible thread with a dynamometric device. The solenoid and the dynamometric device are rigidly secured on the base. A detachable cell filled with liquid to be tested is so constructed that it can be rigidly attached to a vertically movable rod of a vibrator fixed on a base. Two bases are separate units and mounted on shock-absorbers. The arrester of the main rocker is mounted on the rack for movement without rotation, is lifted by a spring and is fixed by a bolt. In the middle of the main rocker is mounted an upright threaded regulator with a weight nut. The control unit is made up of a relay having one coil finish connected to the positive bus of a bipolar power source and other coil finish connected to a make contact and a start button, ends of which are connected to an output of a main rocker position pickup. To the positive bus is connected a make contact which in turn is connected to a break contact of the relay connected to the output to the vibrator, and to a voltage divider having the middle point connected to the output to a timer and its second end connected to the middle point of the bipolar power source. To the positive bus is connected a voltage divider a second end of which is connected to the middle point of the bipolar power source and the middle point of which is connected to a contact of the relay and to an output to an integrator. To the positive bus is connected a voltage divider a second end of which is connected to the middle point of the bipolar power source, and its middle point is connected to a contact and an output to a timing device. An output of the timer is connected to an input of a control unit relay of which an output is connected to the middle point of the bipolar power source. EFFECT: enlarged operating capabilities. 3 dwg