| 摘要 |
A rotary coolant adaptor (10) is disclosed comprising: (i) a rotatable shaft (4) having at one end a chuck (5) for receiving a tool and at the other end a connection (6) for engaging a machine tool spindle, the rotatable shaft having a bore (8) through which pressurized coolant can be supplied to the tool, one or more inlet(s) in fluid communication with the bore and circumferential grooves provided in the shaft to either side of the inlet(s); (ii) a fixed portion locating around the rotatable shaft, the fixed portion having an inlet through which pressurized coolant can be supplied to the inlet(s) in the rotatable shaft; and, (iii) sealing means (20) located in the circumferential grooves, the sealing means having first sealing faces (28) for sealing against the shaft and second sealing faces (26) for sealing against the fixed portion of the adaptor, wherein the pressure of the coolant flowing through the adaptor forces the sealing means (20) to seal against the rotatable shaft and the fixed portion of the adaptor. The rotary coolant adaptor provides sealing means having a relatively long working life and allows coolant to be supplied at higher pressures. |
