Skip to main content

Torsionmeter

The only way to know a vessel’s true horsepower is by measuring at the shaft with a torquemeter.  It is very important to know the true horsepower before and after servicing the vessel in a shipyard.torsionmeter will help maintain the vessel’s performance by having historical data such as shaft horsepower, shaft RPM, shaft torque, total shaft revolutions, and engines hours, available to compare on a monthly, daily or even hourly. Our torsionmeter measures shaft horsepower, shaft RPM, shaft torque, shaft horsepower hours, total shaft revolutions, and engine hours which is triggered by the RPM setpoint.  We believe it is the most reliable and accurate shaft horsepower system on the market. A Shaft Horsepower system is used in the marine industry on vessel propeller shafts to measure the shaft horsepower, shaft torque, shaft RPM, total shaft revolutions, horsepower hours, and engine hours.Armature reaction and interpolesArmature reactionInterpolestransistor workingThe design of a transistor allows it to function as an amplifier or a switch. This is accomplished by using a small amount of electricity to control a gate on a much larger supply of electricity, much like turning a valve to control a supply of water. Transistors are composed of three parts – a base, a collector, and an emitter. The base is the gate controller device for the larger electrical supply. The collector is the larger electrical supply, and the emitter is the outlet for that supply. By sending varying levels of current from the base, the amount of current flowing through the gate from the collector may be regulated. In this way, a very small amount of current may be used to control a large amount of current, as in an amplifier. 
The same process is used to create the binary code for the digital processors but in this case a voltage threshold of five volts is needed to open the collector gate. In this way, the transistor is being used as a switch with a binary function: five volts – ON, less than five volts – OFF. open circuit and short circuit test tht trassi wantsfor motr lying in workshop....open terminal coveryou will see six terminals u1,v1,w1,u2,v2 & w2then show by drawing ny one type of connection delta or star...i showed him star....for star bottom connection u2,v2 & w2 are made short by connecting to each otherso tell him remove the connecting plate of u2,v2 & w2take a multi meter switch it to ohmsfor open circuittake the probes and apply it on u1-u2,v1-v2,w1-w2if no open circuit then the resistance will be same and the values will be between 0.8 to 1.5 ohmsif there is open circuit then the value shown would be infinitynow for short circuitput the probes across u1-v1,v1-w1,w1-u1if short circuit then the values will be between 0.05-0.08 ohmsif no short circuit then the values will be between 0.8-1.5 ohms..

Comments

Popular posts from this blog

Differences between MC/MC-C and ME/ME-C engines

The electrohydraulic control mechanisms of the ME engine replace the following components of the conventional MC engine: Chain drive for camshaft Camshaft with fuel cams, exhaust cams and indicator cams Fuel pump actuating gear, including roller guides and reversing mechanism Conventional fuel pressure booster and VIT system Exhaust valve actuating gear and roller guides Engine driven starting air distributor Electronic governor with actuator Regulating shaft Engine side control console Mechanical cylinder lubricators. The Engine Control System of the ME engine comprises: Control units Hydraulic power supply unit Hydraulic cylinder units, including: Electronically controlled fuel injection, and Electronically controlled exhaust valve activation Electronically controlled starting air valves Electronically controlled auxiliary blowers Integrated electronic governor functions Tacho system Electronically controlled Alpha lubricators

Main engine interlocks

Interlocks are provided so that the engine can be started or reversed only when certain conditions have been fulfilled. When there is a remote control of engines, it is essential to have interlocks. This reduces the possibility of engine damage and any hazards to the operating personnel. Turning gear Interlock . This device prevents the engine from being started if the Turning gear is engaged. Running Direction Interlock . This prevents the fuel from being supplied if the running direction of the engine does not match the Telegraph. Starting Air Distributor in end position . This prevents starting from taking place if the shifting of the Distributor has not been completed. Main Lube. oil pressure, Piston cooling pressure, Jacket water pressure, and important parameters must be above the required minimum. Auxiliary Blower Interlock . The Auxiliary Blower is provided in case of Constant pressure turbo charging. Air Spring pressure Interlock . In case of the present generation

Why is a man hole door elliptical in shape?

Any opening in a pressure vessel is kept to a minimum and for a man entry an elliptical hole  is lesser in size than the corresponding circular hole. More over it is prime concern to have a  smoothed generous radius at the corners to eliminate stress concentration. Hence other  geometrical shapes like rectangle and square are ruled out.  To compensate for the loss of material in the shell due to opening, a doubler ring has to be  provided around the opening. The thickness of the ring depends on the axis length along the  dirrection in which the stresses are maximum and the thickness of the shell. It is important to  align the minor axis along the length of the vessel, as the stress in this direction is  maximum. Longitudinal stress: Pd/2t where P= pressure inside the vessel, d= diameter of the arc, t=  thickness of the shell plating  Circumferential stress: Pd/4t  More over a considerable material and weight saving is achieved as minor is along the  direction of maximum stress.