CFD Analysis of gear box for different oil viscosity

CFD Analysis of gear box for different oil viscosity

Abstract

In this paper study has been carried out on the different oil having different viscosity which is affecting the performance of gear box which is measured with the help of velocity diagram. For that a model of gear box is generated with the help of pro-e and analysis is carried out in ansys software.

1. Introduction

   In this paper thermal analysis of gear box is carried out for different viscosity oils. For the analysis purpose design of maruti Omnis gear box is used. Compression of thermal analysis is done for different viscosity oils as listed below

   1) SAE 85W 140

   1. SAE 80W 90

   2. SAE 75W 90

   3. SAE EDIB

2. SAE 85W 140

Properties of SAE 85W 140 is listed below

These properties are inserted in ansys and CFD analysis is done. The result of CFD analysis is shown in figure 1.

Fig. 1 Velocity diagram in gear box using SAE 85W 140 From the Fig.1velocity difference found 24.71 Cst

1. SAE 80W 90

   Properties of SAE 80W 90 is listed below

   SAE 80W 90	properties
   API gravity	27.5
   Viscosity at 40° c	130
   Viscosity at 100° c	14.0
   Viscosity index	100

   These properties are inserted in ansys and CFD analysis is done. The result of CFD analysis is shown in figure 2.

   Fig. 2 velocity diagram in gear box using SAE 80W 90 From the Fig.1 velocity difference found 24.5 Cst

2. SAE 75W 90

   Properties of SAE 75W 90 is listed below

   SAE 75W 90	properties
   API gravity
   Viscosity at 40° c	129.7
   Viscosity at 100° c	16.6
   Viscosity index	137

   These properties are inserted in ansys and CFD analysis is done. The result of CFD analysis is shown in figure 3.

   Fig. 3 Velocity diagram in gear box using SAE 75W 90 From the Fig.1 velocity difference found 23.2 Cst

3. SAE EDIB

   Properties of SAE EDIB is listed below

   SAE EDIB	properties
   API gravity	26.0
   Viscosity at 40° c	35.2
   Viscosity at 100° c	25.5
   Viscosity index	100

   These properties are inserted in ansys and CFD analysis is done. The result of CFD analysis is shown in figure 4.

   Fig. 4 Velocity diagram in gear box using SAE EDIB From the Fig.1 velocity difference found 25.14 Cst

4. Conclusion

   From the above result it is observed that the maximum velocity difference is in the case of SAE EDIB oil. So it is more desirable to prefer SAE EDIB as an engine oil.

5. References:

1. ANSYS V 12.1

2. Pro-E Wild Fire

3. www.peakantifreeze.com