Drawworks

Description

Draw works

• All sheaves and shafts are made of alloy steel.
• Chains are pressure lubricated.
• Drum is grooved. The low-speed & high-speed ends of the drum shaft are equipped with ventilating pneumatic tube clutch.
• The brake rim (or disc) is water cooled and the surface is medium-frequency induction hardened that provides excellent wear-resistance capacity and long service life.
• High pressure drilling fluid sealing system.
• The main brake is hydraulic disc brake, and the auxiliary brake is electromagnetic eddy current brake.
  • Technical Specification

  ModelParameters	JC40	JC40D	JC40DB	JC50	JC50D	JC50DB	JC70	JC70DB
  Rating Impute Power hp (kW)	1000(735)			1500(1100)			2000(1470)
  Max. Fast line Pull lbf.(kN)	61820(275)			76435(340)			109030(485)
  Dia. of Drill Line in (mm)	1 1/4(32)			1 3/8(35)			1 1/2(38)
  Drum Size (dia.×width) in (mm)	25.20×44.84 (640×1139)	25.20×51.25 (640×1302)		26.97×44.80 (685×1138)			30.31×53.58 (770×1361)
  Gears for Hoisting Speed	4+2R	Step-less speed changing		6+2R	Step-less speed changing		6+2R	Step-less speed changing
  Brake Disc (dia. x thickness) in(mm)	59.06×2.99(1500×76)			63×2.99(1600×76)
  Main Brake	hydraulic disc brake		hydraulic disc brake, energy- consumption brake	hydraulic disc brake	hydraulic disc brake, energy- consumption brake		hydraulic disc brake	hydraulic disc brake, energy- consumption brake
  Auxiliary Brake	DWS40L	WCBD236		FDWS50LD	WCBD336		DS-70