Coupling drive (for all types of fan)

This description is applicable to Arrangement Nos. 7 8 and 17. A flexible coupling permitting limited misalignment is now nor­mally used. The motor may be removed for maintenance pur­poses without disturbing the fan alignment. Arrangements 8 and 17 are particularly appropriate for large high powered fans and there are generally no limitations on the power to be transmitted.

Arrangement

No.

 

Description

 

Motor position

(see Figure 9.4)

 

Outline drawing

 

Single-inlet fan for belt drive.

Impeller overhung on shaft running in 2 plummer block bearings supported by a pedestal.

 

»

 

Single-inlet fan for belt drive.

Impeller overhung on shaft running in bearings supported by a bracket attached to the fan casing.

 

Single-inlet fan for belt drive.

Impeller mounted on shaft running in bearings on each side of casing and supported by the fan casing.

 

Single-inlet fan for direct drive.

Impeller overhung on motor shaft. No bearings on fan. Motor supported by base.

 

CT

 

Single-inlet fan for direct drive.

Impeller overhung on motor shaft.

No bearings on fan. Motor attached to casing side by its flanged end-shield.

 

Double-inlet fan for belt drive.

Impeller mounted on shaft running in bearings on each side of casing and supported by the fan casing.

 

Coupling drive (for all types of fan) Coupling drive (for all types of fan) Coupling drive (for all types of fan)

Single-inlet fan for coupling drive.

Generally as arrangement 3 but with a base for the driving motor.

Coupling drive (for all types of fan)

Single-inlet fan for coupling drive.

Generally as arrangement 1 plus an extended base for the driving motor.

WorZ

подпись: worzSingle-inlet fan for coupling drive.

Generally as arrangement 1 but with the motor mounted on the outside of the bearing pedestal.

Coupling drive (for all types of fan)

10

подпись: 10Single-inlet fan for belt drive.

‘HBt

подпись: 'hbtGenerally as arrangement 1 but with the drive motor inside the bearing pedestal.

Motor position

(see Figure 9.4)

 

Outline drawing

 

Description

 

Arrangement

No.

 

WorZ (very rarely XorY)

 

Single-inlet fan for belt drive.

Generally as arrangement 3 but with the fan and motor supported by a common base frame.

 

11

 

WorZ (very rarely XorY)

 

Single-inlet fan for belt drive.

Generally as arrangement 1 but with the fan and motor supported by a common base frame.

 

12

13

 

Single-inlet fan for belt drive.

Generally as arrangement 1 but with the motor fixed underneath the bearing pedestal.

 

14

15

 

Single-inlet fan for belt drive.

Generally as arrangement 3 but with the motor supported by the fan scroll.

 

Single-inlet fan for direct drive.

Driving motor in-set within impeller and fan casing.

 

16

 

Double-inlet fan for direct drive.

Driving motor in-set within impeller and fan casing.

 

17

 

Double-inlet fan for coupling drive.

Generally as arrangement 6 but with a base for the driving motor.

 

1

 

WorZ (very rarely XorY)

 

Double-inlet fan for belt drive.

Generally as arrangement 6 but with a fan and motor supported by common base frame.

 

18

 

19

 

Double-inlet fan for belt drive.

Generally as arrangement 6 but with the motor supported by the fan scroll.

 

NOTE Arrangements 1, 3, 6, 7, 8 and 17 may also be provided with the bearings mounted on pedestals for base set independent of the fan housing.

 

Table 9.2 Standard drive arrangements for centrifugal fans (continued) 154 FANS & VENTILATION

 

Coupling drive (for all types of fan) Coupling drive (for all types of fan) Coupling drive (for all types of fan) Coupling drive (for all types of fan) Coupling drive (for all types of fan) Coupling drive (for all types of fan) Coupling drive (for all types of fan)

Motor position

(see Figure 9.4)

 

Outline drawing

 

Description

 

Arrangement

No.

 

"fczdh ■

W

69

подпись: "fczdh ■
w
69
№
For belt drive.

Impeller overhung on shaft running in 2 bearings, suitably supported.

For belt drive.

Impeller overhung on shaft running between bearings and supported by fan housing.

For direct drive.

Impeller overhung on driving motor shaft. No bearings on fan. Driving motor base-mounted or integrally direct — connected.

For coupling drive.

Coupling drive (for all types of fan)Generally as arrangement 3 but with a base for the driving motor.

For coupling drive.

Ta

подпись: taGenerally as arrangement 1 plus an extended base for the driving motor.

For belt drive.

Generally as arrangement 1 but with a driving motor outside and supported by the fan casing.

WorZ (very rarely XorY)

подпись: worz (very rarely xory)11 For belt drive.

Generally as arrangement 3 but with fan and driving motor outside and supported by a common base frame

WorZ (very rarely XorY)

 

For belt drive.

Generally as arrangement 1 plus an extended base for the driving motor.

 

12

 

Coupling drive (for all types of fan)

Posted in Fans Ventilation A Practical Guide


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