Actuator motors

Textile motors Crane motors Determining the size of motor Sugar centrifuge motors Motors for deep-well pumps Motors for agricultural application Surface-cooled motors Torque motors or actuator motors Vibration and noise level Service factors Motors for hazardous locations Specification of motors for Zone 0 locations Specification of motors for Zone I locations Motors for Zone 2 locations Motors for mines, collieries and quarries Intrinsically safe circuits, type Ex. f Testing and certifying authorities Additional requirements for ciritical installations Motors for thermal power station auxiliaries Selection of a special-purpose motor... 

Anon, Atlas/Aerospace No 8, 1969, Atlas Chemical Ind, Valley Forge, Pa 19481 reviewed by G. Cohn, Edit in Expls Pyrots 3(3), 1970 under the title Explosives for Actuators [LMNR (Lead Mononitroresorcinate), KDNBF (Potassium Dinitrobenzofuroxane) and BaSt (Barium Styphnate) are the three common materials used as either ignition drops or base charges in actuators, motors, switches, and matches. LMNR, a stable, low-cost compd, is always used with 5 to 40% KCIO3. KDNBF, a higher cost material, is 5 to 10 times more powerful than LMNR. 

Dilution actuators Motorized valves feed dilution water into the stock distributor, which is located upstream of the headbox nozzle. Typical spacing between actuators is 35 to 100 mm. 

Small ultrasonic motors such as the rotary actuator shown in Figure 10 have also been made and can be used for automobile windows, seats, and windshield wipers. Many small industrial motors could make use of the high torque, low speed, and precise stepping character of these actuators. 

Following the invention of the hydrauHc press in 1795 (3), the use of hydrauHcs expanded rapidly during the nineteenth century. The weight-loaded accumulator, invented ca 1850, was used to store energy in hydrauHc systems. The elementary press circuit has several parts that are common to all hydrauHc systems a reservoir, a pump, piping, control valves, a motor, which in this case is a hydrauHc cylinder or ram, and the hydrauHc fluid. By ca 1860 hydrauHc presses were used for forging, and an adjustable-speed hydrauHc transmission was perfected in 1906 (2). The manufacture of hydrauHcahy actuated machines attained industrial importance after 1920. 

A three-state controller is used to drive either a pair of independent on/off actuators such as heating and cooling valves, or a bidirectional motorized actuator. The controller is actually two on/off controllers, each with deadband, separated by a dead zone. When the controlled variable lies within the dead zone, neither output is energized. This controller can drive a motorized valve to the point where the manipulated variable matches the load, thereby avoiding cychng. 

Automatic filters are made with either viscous-coated or dry filter media. However, the cleaning or disposal of the loaded medium is essentially continuous and automatic. In most such devices the air passes horizontally through a movable filter curtain. As the filter loads with dust, the curtain is continuously or intermittently advanced to expose clean media to the air flow and to clean or dispose of the loaded medium. Movement of the curtain can be provided by a hand crank or a motor drive. Movement of a motor-driven curtain can be actuated automatically by a differential-pressure switch connected across the filter. 

Such relays are in the form of a small tube inside which is a loosely fitted rotatable shaft, held by a very thin film of this alloy. The alloy senses the motor temperature through a heater connected in series with the motor terminals and surrounding this tube. When the motor current exceeds the predetermined value, the alloy melts and enables the shaft to rotate and actuate the lever of the tripping mechanism. 

Solenoid valve actuator Electric motor, AC A Atmospheric outlet FC Control element closes on failure of auxiliary energy supply FO Control element opens on failure of auxiliary energy supply O Silencer... 

Carburetors, pistons, piston rings, and valves Fluid power cylinders and actuators Fluid power pumps and motors Scales and balances, except laboratory Industrial and commercial machinery and equipment, n.e.c ... 

Each independent and dependent operator has two aspects 1) Operation represents a component requiring actuation. For example, a motor-operated valve, is represented as a Type 6 operator since the valve needs both an input (flow) and an actuation (electric power) to pass the flow... 

The HFBR core uses fully-enriched (93%) uranium oxide-aluminum cermet curved plates dad m aluminum. The core height is 0.58 m and the diameter is 0.48 m or a volume of 103.7 Itr. The U-235 weighs 9.83 kg supported by a grid plate on the vessel bottom. The coolant flow u downward. Iience. How reversal is necessary for natural circulation. It operating temperature and pressure are 60 ( and 195 psi. There are 8 main and 8 auxiliary control rod blades made of europium oxide (Lii A)o and dysprosium oxide (DyjO,), clad in stainless steel that operate in the reflector region. The scram system is the winch-clutch release type to drop the blades into the reflector region. Actuation of scram causes a setback for the auxiliary control rods which are driven upward by drive motors,... 

Actuator An automatic device providing valve or damper control of fluid flow by means of an electrical, hydraulic, or pneumatic motor. 

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