What Is a Coolant Pump?
Coolant Pumps are used in various industrial machines to circulate coolant, cutting oils, and other fluids within the machine.
In metal cutting machines, coolant and cutting oil must be used to cool, lubricate, and clean the cutting parts. Coolant is also circulated in car engines to cool the heat generated by the engine. Coolant Pumps circulate these fluids.
Coolant pumps used in machine tools have excellent durability against liquids because the main body of the pump is directly submerged in the liquid. They are also relatively compact and lightweight for pumps, and have excellent environmental resistance, making them resistant to mist generated in the factory.
Uses of Coolant Pumps
Coolant pumps are mainly used in machine tools for metal cutting. Specifically, lathes, grinders, milling machines, and other machine tools that perform cutting operations.
Coolant pumps are also used as cleaning devices, as coolant must be filtered and circulated after cooling, lubricating, and cleaning cutting tools and workpieces.
Another example outside of machine tools is the engine. In automotive engines, also called water pumps, Coolant Pumps circulate coolant liquid, called LLC, to cool the heat generated by the engine in the radiator.
Principle of Coolant Pumps
In general, a pump is required to have two capacities: a suction capacity to suck in liquid and a discharge capacity to push the sucked-in liquid to the desired location.
The suction capacity is created by creating a vacuum and utilizing atmospheric pressure, while the discharge capacity is created by applying pressure to the liquid. To create these two capacities, Coolant Pumps are available in two types of structures: self-priming and immersion.
1. Self-Priming Type
Self-priming pumps are compact and lightweight because the pump and the motor that drives it are integrated into one unit. Therefore, it is often used in small machine tools.
2. Immersion Type
In the immersion type, the pump and drive motor are separate, and the pump is submerged directly into the liquid surface. They are used in lathes, grinders, and milling machines used in cutting and other processes.
Other Information on Coolant Pumps
Internal Relief for Coolant Pumps
In order for pumps to supply and circulate fluids, all fluid circulation paths are basically sealed. However, some Coolant Pumps have what is called a non-seal construction.
The non-seal structure dares not to use a mechanical seal, but allows the internal liquid to flow out through a minute gap and provides internal relief when the pressure decreases. The absence of sealing parts also reduces parts and assembly costs.