Torsionally Rigid Gear Couplings - ZAPEX ZN Series Siemens

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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.

Обзор



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

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

I M2

Materials

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

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 ΔKa must be understood as the maximum permitted enlargement of the hub distance S of the coupling.

Angular misalignment ΔKW

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

Radial misalignment ΔKr

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

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