The purpose of employing a dynamometer would be to test the strain capability of an electric train engine prior to putting it in service. It allows for that break-in of a new or newly rebuilt engine in the controllable environment. Engine manufacturers, rebuilders and several fleets have proven this type of break-in procedure through years of experience. Properly run-in engines keep going longer, run better and cost less to keep up. This informative article highlights the process of water brake engine dynamometer.
A train locomotive without a load can only produce speed. Maintaining a given rate of revolutions per minute (RPM) requires a tiny amount of engine horsepower. The dyno can be a strategies by that any controlled load can be added and monitored. Having a water brake dynamometer, the horsepower of the prime mover is transformed into heat with the dynamometer water. The stators and rotors successfully accomplish this transfer of energy. Both the stators and rotors have pockets built within them. As water is brought into the engine dyno or chassis dyno by passages inside the stator, it's discharged into the dyno nearby the center of rotation of the rotor assembly. This water entering the dyno will flow to the pockets of the rotor. The lake will be accelerated by the rotation from the rotor assembly, that is connected to the output shaft of the engine. As it accelerates (or accelerates), the water tends to fly out due to centrifugal force. And because the water flies out, it leads to pockets in the stator plates. The water in these similar pockets in the stator plates tends to come to an end and is also once more met through the rotating rotor assembly. The lake is hasten (or accelerated) again, and www.pocketpussytoy.com
also the constant acceleration and deceleration of the water, power is required which is changed into frictional heating with the water. The thermal conversion of engine capacity to frictional heating from the water is based on pure laws of physics.
Horsepower may be defined when it comes to heat. Heat loads are measured with regards to "BTUs" or British Thermal Units. A BTU of warmth may be the amount of heat that it would decide to use improve the temperature of just one pound of pure water by one degree Fahrenheit. While confronting water brake dynamometers, heat loads when it comes to BTUs are very important.
Because we're raising the temperature
of just one pound of water by one degree Fahrenheit, we'll need to find out some more definitions. You can find 62.4 pounds of pure water in the cubic foot. You can find 231 cubic inches in a single gallon of pure water. Therefore, one gallon of pure water would weigh 8-⅓ pounds. One horsepower is the same as 2,545 BTUs hourly or about 45.5 BTUs per minute. Using this information, we could now determine the quantity of water that's necessary to absorb certain quantity of horsepower. The quantity of water within the dyno at a instant determines how much horsepower that it can absorb. The harder water that's within the dynamometer, the greater the dyno can absorb. You can not put more water in to the dyno compared to the amount for that amount of horsepower which you want to test.
The dynamometer doesn't hold water. It is simply something for converting the horsepower into heat from the water. Due to this, you'll need a given flow with the dyno with a given horsepower rating. How much flow varies because there are many horsepower to be absorbed and is directly proportional. The greater the level of load required, the better the amount of water will need to be supplied.
The quantity of water supplied for the dynamometer is controlled externally towards the dynamometer. This can be accomplished either by a pair of manual shut off valves mounted in the water supply line, through the electric remote load control valve or by the servo-operated inlet manifold option. Whether the manual or electric valves are utilized, both of them accomplish the same task. The broader the valve is opened, the more water it enables to flow towards the dynamometer. This flow for the dyno is directly proportional towards the quantity of horsepower being absorbed.
An exhaust or outlet valve can also be attached to the dynamometer. The objective of this valve is to conserve water while allowing the dynamometer to perform on various temperatures of inlet water. Once we are converting horsepower
into heat with the water, the partnership from the inlet and outlet water temperatures becomes a crucial consideration. The exhaust valve is a controlled orifice. The farther it's opened, the greater the water consumption is going to be.
- 2014/02/23(日) 05:08:21|
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