Hydraulic oil is a must for many machines as they need lubrication, you must be aware of that there are various options available when it comes to lubricants. This can mean your machine may be running OK with a specific product, but this does not indicate if the product chosen is actually optimal for your application.
In most cases lubricants that have been used that are not optimal will not cause catastrophic and sudden failure, but they can decrease the lifespan of certain lubricated components.
When it comes to hydraulics two main considerations should be kept in mind:-
the type of hydraulic oil . . .
and viscosity grade.
These types of specifications will be determined by the hydraulic pump type used inside the system, the operating pressure and operating temperature. However, there are few other important considerations that will include:-
The requirement for these specific items will vary intensely according to the environment in which the machine operates the machine type and a host of other variables.
Viscosity And Pumps Requirements
One of the most important criteria for lubricant selection will be the design of the pump and the viscosity grade required.
There are 3 main designs of pumps utilised in a variety of hydraulic systems:
Every design has a specific role for certain operations and performance tasks. Therefore, every type of pump should be handled on an individual basis when selecting the right hydraulic oil.
The gear pump is generally inefficient when compared to the other pump types, but can agree with contamination of larger amounts. The gear pump works by pressurizing fluid that is found between trapped air-volume in meshing-teeth of the gear and the wall inside the gear-housing. It then expels this pressurized fluid.
The piston pump is considered a middle-of-the-road typical type of hydraulic pump. These pumps are more enduring in their operation and design when compared to vane pumps. These pumps are made to produce operating pressures that are much higher.
The viscosity range typically in piston pumps is around 10-160 cSt (cSt = centistokes a unit of viscosity) when at fully operating temperatures.
Design make-up of vane pumps is what the name depicts. Inside these pumps are rooters that have slots that are mounted onto a shaft. The shaft spins crazily to the cam rings. As vanes and rotors spin in cam rings, vanes wear down due to the contact that occurs between these two surfaces.
For this exact reason a vane pump will always be more costly in maintenance. These pumps are ideal for maintaining a steady flow and require viscosity ranges of around 14-160 cSt when at an operating temperature.
Hydraulic fluids consist of numerous roles in ensuring a well-balanced and smooth operation for a specific system. Some of these roles can include:-
The chemical structure of certain hydraulic fluids is available in various forms that are specific for specific applications. These fluids can include synthetic and water-based fluids.
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