Torsionally Rigid Gear Couplings - ZAPEX ZN Series

• Информационные материалы

  Информационные материалы

  

  Coupling suitable for potentially explosive environments. Complies with Directive 94/9/EC for:

  

  II 2 GD c 120 °C (T4)
  -20 °C ≤ T_a ≤ +80 °C

  

  I M2

  Materials

  • Hubs and flanged sleeves: steel
  • O ring: perbunan
  • Lubricant: grease filling
    

  Область применения

  ZAPEX couplings are especially suited for operation in harsh operating conditions, such as drives in the iron smelting or cement industry. ZAPEX couplings are suitable for reverse operation and horizontal mounting positions and, in the case of type ZNNV, for vertical mounting positions.

  Дизайн

  A ZAPEX coupling comprises two hub sections with external teeth which are mounted on the machine shafts. The external teeth engage with a flanged sleeve with corresponding internal teeth. The flanged sleeves are connected via two flanges with close-fitting bolts.

  The teeth are lubricated with grease. On the ZAPEX type ZN, O-rings are used to seal the tooth space. The O-rings prevent the lubricant from escaping and dirt from entering the tooth space. The parallel keyways must be sealed during assembly to prevent lubricant from escaping.

  Customized hub designs are described after the types.

  ZAPEX ZN gear coupling types

  Type	Description
  ZNN	Standard type
  ZNZS	With adapter
  ZNW	With intermediate shaft
  ZNBG	With straight brake disk
  ZNNA	With axial backlash limiter
  ZNZA	With adapter and axial backlash limiter
  ZNNV	Vertical type
  ZNN	For axial displacement

  
  
  

  Further application-related coupling types are available.
  Dimension sheets for and information on these are available on request.

  Особенности

  ZAPEX gear couplings link machine shafts and compensate for shaft misalignment with weak restorative forces. High transmissible torque combined with compactness and light weight are characteristic of ZAPEX couplings. ZAPEX coupling types are constructed on a modular principle, so application-related solutions can be delivered quickly.

  This coupling requires very little maintenance. Regular grease changes at the prescribed intervals prolong the service life of the coupling.

  Технические данные

  Power ratings

  Size	Rated torque	Maximum torque	Overload torque	Fatigue torque	Torsional stiffness	Permitted shaft misalignment
  					ZN
  	TKN	TKmax	TKOL	TKW	CTdyn	ΔKa
  	Nm	Nm	Nm		kNm/rad	mm
  84	1 020	2 040	4 080	408	500	1
  107	2 210	4 420	8 840	884	1 400	1
  130	4 020	8 040	16 080	1 600	2 500	1
  156	6 600	13 200	26 400	2 640	5 800	1
  181	11 000	22 000	44 000	4 400	9 200	1
  211	19 200	38 400	76 800	7 680	16 600	1
  250	30 680	61 360	122 720	12 270	27300	1
  274	43 550	87 100	174 200	17 400	41500	1.5
  307	61 750	123 500	247 000	24 700	61 000	1.5
  333	87 100	174 200	348 400	34 800	79 000	1.5
  364	117 000	234 000	468 000	46 800	99 000	1.5
  424	162 500	325 000	650 000	64 800	156 000	1.5

  
  
  

  The specified torsional stiffness “ZN” applies to coupling types ZNN, ZNNA, ZNNV and ZNN for axial displacement.

  Torsional stiffness of types ZNZS, ZNW, ZNBT, ZNBG, ZNZA and ZNZN on request.

  The axial misalignment ΔK_a must be understood as the maximum permitted enlargement of the hub distance S of the coupling.

  Angular misalignment ΔK_W

  • Types ZNN, ZNZS, ZNW, ZNNV, ZNN for axial displacement: ΔK_W = 0.5°
  • Types ZNBG, ZNNA, ZNZA: ΔK_W = 0.2°

  Radial misalignment ΔK_r

  • Types ZNN, ZNZS, ZNW, ZNNV, ZNN for axial displacement: ΔK_R ≤ VA · tan 0.5°
  • Types ZNBG, ZNNA, ZNZA: ΔK_r ≤ VA · tan 0.2°

  For the tooth distance VA, see the relevant table for the subassembly.