The reason why Sauer SPV6 hydraulic pump is in static state

Clamp the sealing structure between the piston and cylinder of the hydraulic oil cylinder. The sealing structure of Sauer SPV6 hydraulic pump accessories is simple, easy to install, and has good sealing performance.

Under normal circumstances, there is almost no leakage when performing static sealing. When performing dynamic sealing, leakage occurs only when moving at high speed. The clamping hydraulic cylinder in this circuit is in a stopped state when clamping the workpiece. What is the cause of leakage?

There are many reasons for the leakage of hydraulic cylinders, such as: unreasonable seal ring shrinkage, poor device accuracy of the seal part, rough seal appearance, damage to the seal ring surface during installation, unreasonable selection of seals and oil, Sauer SPV119 Hydraulic The seal ring of pump parts is bitten and twisted and cracked, dust and residual intrusion into the system damage the seal, and the pressure shock makes the seal loose.

There is no pressure shock phenomenon in this system, the selected hydraulic oil and sealing ring data are compatible, and the accuracy of the device can be ensured by adjustment during installation.

After disassembling the hydraulic cylinder, no damage was found such as external scratches, cracking of Sauer PV27 hydraulic pump parts. After inspection, the surface roughness of the seal reached Ra=0.4μm, which satisfies the sealing requirements, so the unreasonable shrinkage of the seal ring may be the cause of leakage of the clamping hydraulic cylinder.