API 610 OH6 pump
API 610 OH6 pump
(OP)
All, I want to ask about construction of API 610 OH6 pump (High speed geared pump),
Is there any Spacer coupling between Motor and Gearbox?
If any spacer, what is the purpose? Motor will take off while maintenance anyway..
unless you have vertical motor stand on your OH6,
thank u
Is there any Spacer coupling between Motor and Gearbox?
If any spacer, what is the purpose? Motor will take off while maintenance anyway..
unless you have vertical motor stand on your OH6,
thank u





RE: API 610 OH6 pump
Other pumps of this type use a non-lubricated disk-pack type couplings for a close-coupled arrangement. This type has a spacer housing and perhaps a gap of about 3/8” between the shaft ends. This type of coupling is difficult to assembly and disassemble. It has a spacer, of sorts. But, you have to disassemble the bolts and washers through the disk packs to take it apart. But, at least this lets you use a standard motor with a short shaft.
The last type of coupling commonly used is a standard spacer coupling. This could be any type. We commonly use disk pack couplings with drop out spacers (Thomas Series 71).
There are many reasons to use the spacer coupling. It is more reliable than the spline and requires much less maintenance. It is quicker and easier to disassemble and reassemble than the close-coupled arrangement. It has a longer span between flex planes which reduces the load on the bearings if the alignment across the pilot fit from the motor to the gearbox is not perfect (and they are not). I would not consider purchasing a pump of this type without a spacer coupling.
Johnny Pellin
RE: API 610 OH6 pump
1) The spline shaft connection type are use for small motor application, I think up to about 75kW only. You need a special construction motor. The motor directly sits on top of the gear box. Advantage of this design is you don't have to concern about the alignment.
2) The second type using a normal non-spacer coupling is used for motor of larger HP and weight less than a certain weights (can't remember the figure). It has a motor stool or adapter between the gear box and the standard construction motor. You need to dismount the motor to access the gear box and pump end.
3) For large motor weights that can not be supported by the gear box directly. A motor stand is used and with spacer coupling. You can remove the gear box /pump without the need to dismount the motor. A lifting mechanism is built into the motor stand to lift and move the gear box and pump end out of the motor stand.
You can opt for type 3 arrangement for smaller unit also, but is not worth the money spent. The smaller motor units can be easily remove and mounted and without the motor stand, is much more easily accessible.
RE: API 610 OH6 pump
RE: API 610 OH6 pump
thank u very much for uR explanation, its really helpful!