| 摘要 |
A drawworks (10) having a drum spool (20). a drum shaft (30) concentrically supported by the drum spool (20), a rotary union (50), brake assemblies (41, 42) and a brake cooling system which circulates a cooling fluid through the brake assemblies (41, 42) to thereby reduce the operating temperature of the brake assemblies (41, 42). The brake cooling system includes a cooling fluid passage that extends through the drum spool (20), the rotary union (50) and the brake assemblies (41, 42). |
