Grease and its applications in industry
The most important uses of grease are as follows:
1- The number of lubrication times with grease is less compared to oil, and this reduces costs and repairs. This issue is considered an advantage in conditions where access to machinery is difficult, such as engines installed on roofs, drive lines, inaccessible bearings, and the like. Dirt or the exit of some materials from the machines.
3- Lubrication with grease in the sealing of parts and the use of felt bowls and the like is done at a lower cost. Oil-sealed felt bowls waste more power due to more friction with the parts.
4- Compared to oil, grease continues lubrication for a longer time. Some greases are made in such a way that they remain sealed in the part and its lifetime is the same as the part. 5- When a part is not used and the lubricant is removed, to prevent the part from rusting, Grease is used.
6- Some greases have solved the problem of lubrication in the vicinity of water.
7- A number of greases create less friction when starting the device.
8- Grease is placed like a soft layer between parts and reduces noise and vibration and smooth operation in some devices such as large gears. will be
9- Grease works better in devices that work under high pressure, high temperature, harsh operating conditions, low speed and continuous shocks, and bearings whose axial rotation is regularly reversed.
10- Where the machines have severe corrosion and wear, grease is better used in most cases.
11- In the design of machine bushings and bearings, grease has a more effective role than oil and It makes it simple.
Generally, using oil for this purpose incurs a high cost. Comparing the use of grease with oil - greases do not cool the devices during operation, oils penetrate easily in the channels of the devices, but this issue is a weakness for greases.
12- Oils have better advantages in terms of storage. Classification of grease (grade) Grease is divided into 9 groups (grades) in terms of classification.
This division is based on the degree of relative permeability of grease consistency. The numbers in the table contain the amount of penetration of a standard cone to the surface of grease (in tenths of millimeters) at a temperature of 25 degrees Celsius.