The Criticality of Hydraulic Pumps

• Determining the Machine's Load Capacity and Stability:

How much machining force the system can withstand depends entirely on how well the pressure and flow inside the oil pocket are controlled. The hydraulic pump must consistently supply a sufficient excess of high-pressure oil. Once the external machining force suddenly increases, the pump and restrictor must react immediately to replenish the pressure and firmly maintain the oil film's thickness. If the pressure cannot be maintained, the oil film will no longer be able to sustain the load and will eventually break down.

• The Strict "Low Pulsation" Standard Crucial for Machining Accuracy:

Because hydrostatic technology is widely applied in high-precision equipment like ultra-precision machine tools, the stability of the oil supply is paramount. If the hydraulic pump's output pressure pulsates (Note 1), these tiny vibrations will transfer directly to the workpiece, causing surface chatter marks or dimensional deviations, which in turn affect machining quality. To ensure machining quality, the system must strictly use dedicated pumps capable of outputting a continuous, smooth, and extremely low-pulsation flow.

• System Energy Consumption and Temperature Control:

In hydrostatic design, a larger pump specification is by no means better. If the pump's oil supply does not match the restrictor, the excess high-pressure oil forced through tiny restriction holes will cause severe friction and heat generation. This not only wastes electricity pointlessly, but the excessive rise in oil temperature can also cause thermal deformation. Therefore, only by using a pump whose flow and pressure precisely match the machine can you eliminate ineffective energy consumption and temperature control issues at the source.

Note 1: Refers to the periodic and regular fluctuations (increases and decreases) in pressure and flow rate when fluid is output through a pipeline.

Hydraulic Pump Comparison