Disadvantages of a homogenization
- Once the homogenization process has done, milk can not be separated.
- The homogenized milk is not suitable for producing semi hard or hard cheese.
MAIN PROBLEM
The main problem related to this homogenizer is the failure of its connecting rod. Company is frequently getting failure at every 2.5 years. We have done FAULT TREE ANALYSIS for finding out the exact reason for the failure. Fig 4: Broken connecting rod from joining.
FAULT TREE ANALYSIS (FTA)
Fault tree analysiswas conducted finding the causes of failure of connecting rod of the homogenizer. This was [possible after getting familiar with the construction detail as well as the working conditions and process. Fig 5: Fault tree analysis of connecting …show more content…
This all points can be understood by fault tree analysis diagram.
2. Metallurgical failure.
In the material composition of connecting rod of a homogenizer, we have several materials in different compositions. If the material which is being selected for he given application it is not under the given norms, then It can have the metallurgical failure. It is mainly depending upon the parameter like hardness, toughness and the ability of stress distribution.
Understanding Rod Stresses:-
Connecting rods are subjected to both compressive and tensile forces during the 720 degrees of the four-stroke homogenizer cycle. On the pumping stroke, pressures inside the cylinder increase, pushing back down against the rod. Depending homogenizer’s compression ratio, pressure, etc, that pressure can rise quickly and steeply.On the pressure side, the rod must endure a sudden and violent direction change in addition to the pressure generated by the pressurize milk.
Hardness of connecting …show more content…
Manufacturing failure.
(2) Dye Penetration and Fluorescent Powder Testing of Connecting rod:- For tiny cracks, pores or other surface that are hard to detect by human eye, dye penetrate testing is used for both ferrous and nonferrous materials. In this method, a colour dye solution is put to the surface of the casting. The dye is suspended in penetrating oil, will find its way into the surface defects. When a special developer is applied, defects are clearly indicated.
A method involves fluorescent powder suspended in penetrating oil. Again, the solution penetrates the defects, when the casting is dusted or sprayed drying powder, the solution is drawn from the defect and glows under an ultraviolet light where defects have occurred.
Fluorescent powder testing only detects surface cracks and pores but is more effective and economical than radiographic testing.
Fig 8: Dye penetration test on the broken connecting rod.
On the basis of the penetration test which has performed, no surface crack, surface roughness and the cavities are observed. So it is clear that the, material is isolated from the manufacturing
- Once the homogenization process has done, milk can not be separated.
- The homogenized milk is not suitable for producing semi hard or hard cheese.
MAIN PROBLEM
The main problem related to this homogenizer is the failure of its connecting rod. Company is frequently getting failure at every 2.5 years. We have done FAULT TREE ANALYSIS for finding out the exact reason for the failure. Fig 4: Broken connecting rod from joining.
FAULT TREE ANALYSIS (FTA)
Fault tree analysiswas conducted finding the causes of failure of connecting rod of the homogenizer. This was [possible after getting familiar with the construction detail as well as the working conditions and process. Fig 5: Fault tree analysis of connecting …show more content…
This all points can be understood by fault tree analysis diagram.
2. Metallurgical failure.
In the material composition of connecting rod of a homogenizer, we have several materials in different compositions. If the material which is being selected for he given application it is not under the given norms, then It can have the metallurgical failure. It is mainly depending upon the parameter like hardness, toughness and the ability of stress distribution.
Understanding Rod Stresses:-
Connecting rods are subjected to both compressive and tensile forces during the 720 degrees of the four-stroke homogenizer cycle. On the pumping stroke, pressures inside the cylinder increase, pushing back down against the rod. Depending homogenizer’s compression ratio, pressure, etc, that pressure can rise quickly and steeply.On the pressure side, the rod must endure a sudden and violent direction change in addition to the pressure generated by the pressurize milk.
Hardness of connecting …show more content…
Manufacturing failure.
(2) Dye Penetration and Fluorescent Powder Testing of Connecting rod:- For tiny cracks, pores or other surface that are hard to detect by human eye, dye penetrate testing is used for both ferrous and nonferrous materials. In this method, a colour dye solution is put to the surface of the casting. The dye is suspended in penetrating oil, will find its way into the surface defects. When a special developer is applied, defects are clearly indicated.
A method involves fluorescent powder suspended in penetrating oil. Again, the solution penetrates the defects, when the casting is dusted or sprayed drying powder, the solution is drawn from the defect and glows under an ultraviolet light where defects have occurred.
Fluorescent powder testing only detects surface cracks and pores but is more effective and economical than radiographic testing.
Fig 8: Dye penetration test on the broken connecting rod.
On the basis of the penetration test which has performed, no surface crack, surface roughness and the cavities are observed. So it is clear that the, material is isolated from the manufacturing