PTI motar

Does any one know how PTI motar works in marine gearbox?

 

Does anyone know what PTI motar is?

 

I am talking about the PTI/PTO solution on the gearbox for marine engines. PTI solution facilitates the propulsion to be operated when the main engine is disconnected from the gearbox. I know only that PTI motar can be engaged with the gearbox while main engine is disengaged to move operate the propulsion. BUt I dont know how this PTI motar works

 

I think you mean MOTOR not motar!?

The PTO "power take off" is easy to understand (damned American disease of using acronyms for everything)

The "power take in" (PTI) is commonly a El. motor, driven by Generator.

Did that help?

Regards
Richard

 

yea, we should use 500 letter compound nouns

 

Oh, don't exaggerate...PTI - "Thethingoneattachestotodrivetheboatwhenthemainquits."

 

You´ve got it Mark! Thank you!

Isntitmucheasiertounderstandthanthegoddamnacronyms?

 

There are many kinds of PTOs. They can be engaged continuosly or not. They can be engaged with a clutch, a spline or hydraulics. They can have variable speed or fixed. The can be reduced or multiplied through the gearbox. They can come right of the crankshaft. They can come off a gear from the crankshaft. They can be chain driven from the crankshaft. They can be belt driven...etc, etc.

 

Nono Gonzo.

P T I was the topic! There are not many ways. And the most common was mentioned.

 

I was barking at the wrong motar

 

OK, Let me rewrite my question..

I am interested in understanding how Power take-in (PTI) motor is working.

PTI is also called auxillary propulsion drive (APD).

 

Richard I understand that PTI is an elec motor operated by generator.. but PTI is driven by the main engine too..So I am confused how it works when PTI drives the propulsion when the main engine is disengaged. Can you elaborate if you know the working of this mechanism?

 

Interested in a near-silent electric auxiliary (to not disturb wildlife), I approached ZF with this question a few years ago and they brushed me off. I assumed I would have to wait until I got my hands on a broken one or buy new... please post if you find anything. - Mark

 

No krishna,
the main engine is coupled to the gear in the common way.
A gearbox with pto has just a shaft coming out the box where you can "draw" some power. Means, couple a hydraulic compressor or something the like.
If the gearbox is designed to RECEIVE power through such a shaft (the common PTO cannot!) we say PTI.
That is a second "power in" shaft and a second coupling.
On some MIL. vessel setups you find PTI´s which operate simultaneously with the main to provide additional power.
More common is, that the main is´nt coupled when you use the PTI input.
A "coming home" propulsion, or the useage intended by Mark, is such a case.

Although a PTO is quite cheap and widely used for many applications (from watermaker through El. generation, `til Hydraulic setups), the PTI gearbox is not. It is a expensive piece of metal.

Mark, ZF should have several off the shelve boxes for your application.

Regards
Richard

 

if we all speak in acronyms does that mean richard wont understand?