Research Article
Characterization and Evaluation of Rotation Accuracy of Hydrostatic Spindle under the Influence of Unbalance
Table 1
Parameters of hydrostatic radial bearings.
| | Parameters | Value |
| | Radius of the spindle rotor R (mm) | 35 | | Lubricating oil density ρ (kg/m3) | 855 | | Gap value of oil film h0 (μm) | 10 | | Length factor of radial oil cavity b | 2.29 | | Oil recess angle θ (°) | 80 | | Oil recess length L1 (mm) | 80 | | Axial sealing edge c1 (mm) | 9 | | Circumferential sealing edge b1 (mm) | 9 | | Length factor of radial sealing surface | 0.85 | | Effective bearing area Ab (m2) | 0.012 | | Dynamic viscosity of lubricating oil μ (kg/ms) | 0.00432 | | Length of axial seal face L1 (mm) | 90 | | Flow coefficient of small holes | 0.7 | | Diameter of the small hole d0 (mm) | 0.8 | | Oil supply pressure pS (MPa) | 2 | | Number of oil recesses N | 4 | | Flow coefficient K0 | 0.7 | | Spindle quality M0 (kg) | 18.69 | | Oil tank width z (mm) | 7 | | Oil tank depth z2 (mm) | 0.8 | | Oil pad inner diameter of thrust bearing R1 (mm) | 35 | | Oil recess inner diameter of thrust bearing R2 (mm) | 41 | | Oil pad outer diameter of thrust bearing R3 (mm) | 44 | | Oil recess outer diameter of thrust bearing R4 (mm) | 55 |
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