Marine Gearboxes
The overwhelming majority of the argousier engine propeller used to convert engine power to a useful work. There are many alternatives that may have for specific applications, but are good systems propeller rounders everything reasonably cheap, simple, reliable, efficient and easy to use.
Suffering, however, a problem potentially important, and it is a great turning point slowly propeller is usually more efficient that a small spin. Even in small pleasure craft, where the maximum size of the propeller is often limited by the form of the hull, the speed of the tree is usually best of the order of 1000 RPM - only half or a quarter of the engine. Engine more slowly, the answer is not because you have recently lost a large part of the energy you paid for the purchase of the first place. What is that you need, that is what will lower the speed of the tree, but to increase torque (turning efforts.
It is also useful to be able to reverse the direction of rotation, to provide a back of the boat to stop or return, or to adapt to against rotating propellor on a dual vis boat. Once again, there are alternatives such as the propellers height variable, leaf rotarys, in the centre, scoop - like baffles or engines boat that can be stopped and restarted in the opposite direction, but by far the most popular is an agreement investment nitratreductor.
Invest the gearboxes
Two wheels, which geometriainformaticaarquitectonica teeth, it becomes one, the other in turn, also. The lowest is 9 teeth, and if you turn 1000 RPM teeth will move teeth to 9000 per minute. The wheel is the largest double the size, and has 18 teeth, teeth way must also be mobile 9000 teeth per minute, which means that only 500 rpm. also note that if the smallest wheel rotates clockwise, the wheel must be more.
In other words, using a 9 - tooth wheel car 18 teeth of the wheel, we have reduced by half the rate has doubled pair, and to reverse the direction of rotation.
Simple transmission reducteurs true vessel seems more complicated, but it is dependent on exactly this principle. In fact, the main difference between the mere geartrain and the Volvo MS2 is that MS2 uses coneshaped tapered so that even if the tree is horizontal, caused by the central axis vertical.
The reason is that it provides an easy way to achieve an election before or behind the March.
L’engrenage tree in the two towers reasonably that Gears tapered turn freely on the vertical axis. One is controlled by the top of the entry of art and a bottom, which are opposite direction, but they are the same size as the other so that they’re at the same speed.
Between the two Arts is Clutch Assembly, the form of 7″ little mounted on a basis of the tree. Ridges called splines in the dimension and corresponding niche in the clutch to ensure that it can drag from top to bottom, but not without running the tree also. Move the spacecraft clutch slides or to one of the pinecones is involved in a hole for a ctus spinning, that blocks art in the tree.
At the bottom of the tree, a small gear is committed with a much more about the output shaft, output horizontal at a speed much lower.
Layshaft transmission while the MS2 and its derivatives are very common in the engine Volvo 200 CH, is something on the use of a vertical axis. An agreement is more prevalent box layshaft.
In this case, a small train tree becomes one of the largest gear layshaft. Like art in the vertical axis of the MS2, it is free to turn around the layshaft, but it can be locked in a clutch. If the tree looks to the right and the clutch is committed, the opposite layshaft and runs more slowly. At the other end of the layshaft an art minor with large mesh gear on the output shaft, driving the output shaft to the right and even more slowly.
Stern gear is carried out by a second layshaft. Its very similar to the first, with two wheels, which has one clutch that can stop or block the free rotation, while the other is on mesh with output shaft. The main feature of the second layshaft is not led directly through the tree, but for the first layshaft. This means that the change in the opposite direction - if a clutch is released and the other management of the output shaft is reversed.
Épicyclique transmission the third alternative, known for its proper functioning, but now increasingly popular - is known as the name of gear box épicycloïdal.
Gears - known as Sunday gear - is mounted on the tree, the engine - driven. Around, there currently several small Gears planétaires mounted on a planet named holder of the cage rigid. While the Cellset is surrounded by a Crown which is more like the hub of the wheel of the trailer, but with teeth engineeded in its inner surface. The output shaft is attached directly to the holder of the planet.
Events of the operation. one clutch keyguard used gear of the world so that they cannot turn. Indeed, this means that the proprietor of the Crown of trees and the output shaft of the world is held as a whole, as though they were.
To reverse, the Crown is locked on the bridge, and the planet gear are free to turn. If the tree looks to the right, this means that within the planets which are contrary to turn the planets external drive anti-clockwise. To do this, they need to run contrary to the procedure of the Crown, taking the owner of the planet - and, of course, the output shaft - around them.
A major problem, is that, even if it provides a front / rear installation cannot provide the shaft speed which is one of the main reasons to want a gear box first. To do this, we need a second transmission along the first - the additional cost, weight, the volume and complexity of the whole of the unit. The second transmission is usually épicycloïdal unit, but with the important difference that there has not clutch, and the output shaft is connected to the Crown, rather than the proprietor of the planet.
In this case, the tree of rotation of the investment of transmission drives du Soleil wheel, which turns the wheels on the planet, and that, in turn by car from the Crown.
Marine clutches an important characteristic of all is that marine while driving gear - forward and back - are meshing all time, and that the selection of the front, back and neutral is obtained by the use clutches unplug the drive train is not used.
There are two main types of clutches: the cone MS2 used in the clutch and the clutch plate used in most other.
The clutch consists of a plate of the Stack of Plates friction. Some of the plates internal splines corresponding mesh with shaft, so that they have evrybody it. Sandwich plates are similar are free to turn axis of the entry external, but they must splines mesh with splines on the inner surface of the clutch housing - related to the output shaft. If and when the battery is in bulk, both axes are free to turn independently of each other. The buff Stack of Plates in contact with each other so that the link and the strength of these two dimensions, in turn, at the same time.
Relatively small engine - 100 CH - a lever for manual order may be sufficient to operate a or the other type of the clutch, engines more powerful, but it must be more pressure to apply. This requires water, who built a bomb in the gear box generates hydraulic pressure force of plates together. All gear from a to do is use a valve, the diversion of hydraulic pressure of the clutch requires.
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