Cooling

Introduction

Once the shaft is selected, the section of Cooling is unlocked meaning that it is possible to access shaft-cooling settings. There are three possible choices:

Solid: No shaft-cooling design. Shaft remains as previously defined in Design.
Cooling - Hollow: A hollow shaft-cooling must be defined, and the input parameter becomes editable.
Cooling – Ring: A ring shaft-cooling must be defined, and the input parameters become editable.

Types of shaft-cooling

Note: When the machine is designed with shaft-cooling, it is represented and considered in the rotor design and thermal design of the machine. See the different configurations below.

Table 1. Type of shaft-cooling

Shaft-Cooling type: None	Shaft-Cooling type: Hollow

Table 2. Type of shaft-cooling

Shaft-Cooling type: Ring	Dimensions are illustrated with arrows

Connection side (C.S.) is identified by yellow lighting.

Input parameters – Cooling - Hollow

The user input dedicated to the definition of hollow shaft-cooling is illustrated below.

Table 3. User input for defining the hollow shaft-cooling

1	Hollow shaft diameter

Hollow shaft diameter – Inner diameter of hollow shaft:]0, 20000] mm
Note: Even though the diameter limits are the default ones, the hollow shaft diameter is constrained by the lowest shaft diameter set in the Design section (C.S diameter or O.C.S. diameter).

Input parameters – Cooling - Ring

The user inputs dedicated to the definition of bearings are illustrated below.

Table 4. User inputs for defining the ring shaft-cooling

1	Ring inner diameter
2	Ring outer diameter

Ring inner diameter:]0, 20000] mm
Ring outer diameter:]0, 20000] mm

Note: Even though the diameters limits are the default ones, the ring shaft diameters are constrained by the lowest shaft diameter set in the Design section (C.S diameter or O.C.S. diameter). Also, the ring inner diameter cannot be set equal to the ring outer diameter, as expected.