| 摘要 |
A fluid swivel (10A) that includes a stationary annular structure (16A, 17A) defining upper and lower annular seal slots (61, 62), and a rotatable outer housing (20A) operatively connected to the stationary annular structure (16A, 17A), the outer housing defining a radial groove (30) that has upper and lower surfaces. Upper and lower seals (40, 41) are positioned between the stationary annular structure (16a, 17a) and the rotatable outer housing (20a) and disposed in the upper and lower seal slots (61, 62). An inner fluid manifold (26A) is disposed in the stationary annular structure (16A, 17A) and arranged to provide fluid of pressure P to the radial groove (30), the fluid exerting a first force (Fv1) longitudinally inwardly on the outer surface of the outer housing (20A), and a second force (Fv2) longitudinally outwardly on the upper and lower surfaces of the radial groove (30), the second force (Fv2) having a greater magnitude than the first force (Fv1) so the outer housing (20A) deflects outwardly, pushing the upper and lower seals (40, 41) into the upper and lower seal slots (61, 62). |
