FLENDER COUPLINGS N-EUPEX 3103en Assembly And Operating Instructions Manual
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FLENDER COUPLINGS N-EUPEX 3103en Assembly And Operating Instructions Manual

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FLENDER COUPLINGS
N-EUPEX
Assembly and operating instructions 3103en
Edition 10/2020
O, P

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Summary of Contents for FLENDER COUPLINGS N-EUPEX 3103en

  • Page 1 FLENDER COUPLINGS N-EUPEX Assembly and operating instructions 3103en Edition 10/2020 O, P...
  • Page 2 16.11.2020 12:40 V11.00...
  • Page 3 Introduction Safety instructions Description FLENDER COUPLINGS Application planning N-EUPEX 3103en Assembly Commissioning Assembly and operating instructions Operation Servicing Service and support Disposal Spare parts O, P Technical data Quality documents Edition 10/2020...
  • Page 4 Note the following: WARNING Flender products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Flender. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems.

  • Page 5: Table Of Contents

    Table of contents Introduction ............................9 About these instructions ...................... 9 Text attributes........................9 Copyright ..........................9 Safety instructions ..........................11 General information......................11 Intended use........................13 Safety instructions for a coupling for use in potentially explosive atmospheres....13 2.3.1 Marking ..........................
  • Page 6 Table of contents 7.2.3 Correcting faults ........................ 39 7.2.3.1 Replacing wearing parts..................... 39 7.2.3.2 Correcting the changed alignment ..................39 Servicing .............................. 41 Maintenance intervals......................41 Maximum permissible torsional backlash................42 Replacing wearing parts..................... 42 Removing the coupling ...................... 43 Service and support..........................
  • Page 7 Table of contents Table 8-2 Maximum permissible torsional backlash for the types O and P ..........42 Table 11-1 Spare parts list for type O ......................50 Table 11-2 Spare parts list for type P......................51 Table A-1 Speeds, geometry data and weights of type O................. 54 Table A-2 Speeds, geometry data and weights of type P................
  • Page 8 Table of contents Assembly and operating instructions 3103en Edition 10/2020...

  • Page 9: Introduction

    The note provides you with help or further suggestions/ ideas. Copyright The copyright for these instructions is held by Flender. These instructions must not be used wholly or in parts without our authorisation or be given to third parties.
  • Page 10 Introduction 1.3 Copyright Assembly and operating instructions 3103en Edition 10/2020...

  • Page 11: Safety Instructions

    Only the knowledge of these instructions can avoid faults on the coupling and ensure fault-free and safe operation. Non-adherence to the instructions can cause product or property damage or personal injury. Flender does not accept any liability for damage or operating failures that are due to non-adherence to these instructions.
  • Page 12 Safety instructions 2.1 General information ANSI Warning Warning - corrosive substances Warning - suspended load Warning - hand injuries ATEX certification Explanation regarding Machinery Directive 2006/42/EC The couplings described here are “components” in accordance with the Machinery Directive and do not require a declaration of incorporation. ATEX Directive The term "ATEX Directive"...

  • Page 13: Intended Use

    Flender will accept no liability or warranty whatsoever for damage occurring as a result of the use of non-approved spare parts. The same applies to any accessories that were not supplied by Flender.

  • Page 14: Conditions Of Use

    2.3 Safety instructions for a coupling for use in potentially explosive atmospheres Coupling part 10 with electrically insulating flexible elements The following marking is visible on the outer diameter of coupling part 10: Flender GmbH II 2G Ex h IIB T6 ... T4 Gb X D 46393 Bocholt II 2D Ex h IIIC T85 °C ...

  • Page 15: General Warning Notices

    Safety instructions 2.4 General warning notices 2. Dust/air mixtures Check the ambient temperature. Table 2-3 Maximum surface temperature (TX) for an explosive atmosphere as a result of dust/air mixtures Max. ambient temperature Max. surface temperature 80 °C 110 °C Notes concerning operation of the coupling in potentially explosive atmospheres •...
  • Page 16 Safety instructions 2.4 General warning notices DANGER Danger Risk of injury due to the use of unsuitable and/or damaged components. The use of unsuitable and/or damaged components can lead to an explosion in potentially explosive atmospheres. • Observe the information regarding conditions of use. DANGER Danger of explosion Improper operation of the coupling can lead to an explosion in potentially explosive...

  • Page 17: Description

    These instructions describe the assembly and operation of an N‑EUPEX coupling arranged horizontally with a shaft-hub connection made by a cylindrical or conical bore with parallel key. Please consult Flender if you want to use a different type of installation. Application N‑EUPEX couplings are designed for use in all kinds of machines.

  • Page 18: Figure 3-2 Type P

    Description Coupling part 2 Coupling part 3 Coupling part 10 Flexible element Cylinder-head screw Cylinder-head screw Cylindrical pin Coupling part 32 Figure 3-2 Type P Assembly and operating instructions 3103en Edition 10/2020...

  • Page 19: Application Planning

    Application planning Check the delivery for damage and for completeness. Report any damage and/or missing parts to Flender immediately. The coupling is delivered in individual parts and preassembled groups. Preassembled groups may not be dismantled. Transport of the coupling WARNING Severe personal injury due to improper transport Severe personal injury due to falling components or due to crushing.

  • Page 20: Table 4-1 Types Of Preservative Agents For Long-Term Storage

    Application planning 4.2 Storage of the coupling The coupling, unless not specifically ordered otherwise, is supplied with preservation and can be stored for up to 3 months. Note Information about storing the coupling • Ensure that the storage room is dry (relative humidity < 65 %) and free of dust. •...

  • Page 21: Assembly

    Preparatory work Note Please consult Flender if you want to machine a conical finished bore. Carry out the following steps if the coupling does not have a finished bore: • Milling the finished bore (Page 22) •...

  • Page 22: Milling The Finished Bore

    Assembly 5.1 Preparatory work Note The customer is responsible for execution of the finishing work on the coupling. Flender shall have no liability whatsoever for claims under warranty arising from finishing work that has not been carried out adequately. 5.1.1 Milling the finished bore The diameter of the finished bore depends on the shaft used.

  • Page 23: Milling The Parallel Keyway

    Assembly 5.1 Preparatory work ① Coupling part 32 ② Coupling part 4 ③ Coupling part 2 ④ Coupling part 2/3 Figure 5-1 Tolerances for finished bore 5.1.2 Milling the parallel keyway Position of the parallel keyway The table below states the required position for the parallel keyway in the coupling parts depending on the coupling type.

  • Page 24: Machining An Axial Locking Mechanism

    Machining an axial locking mechanism The coupling part is secured by a set screw or an end plate to prevent axial movements. Please consult Flender if you want to use an end plate. Note the following when using a set screw: •...

  • Page 25: Table 5-3 Diameter And Axial Position Of The Tapped Hole, Tightening Torque

    Assembly 5.1 Preparatory work Diameter and axial position of the tapped hole in the hub The following diagram shows the axial position of the tapped hole. ① Coupling part 32 ② Coupling part 2 ③ Coupling part 4 Figure 5-2 Diameter and axial position of the tapped hole in the hub The following table contains the values for the diameter and axial position of the tapped hole depending on the size of the coupling.

  • Page 26: Balancing The Coupling

    Assembly 5.1 Preparatory work Position of the tapped hole with respect to the parallel keyway The tapped hole for the set screw is positioned on the parallel keyway. Selection of the set screw CAUTION Physical injury Danger of injury from protruding set screw. •...

  • Page 27: Figure 5-3 Position Of The Balancing Bore For Single-Plane Balancing

    Assembly 5.1 Preparatory work Please note the following when balancing the coupling: • Select the balancing quality accordingly (but at least G16 in accordance with DIN ISO 21940). • Observe the balancing specification according to DIN ISO 21940-32. • Machine the balancing bore on a large radius with adequate clearance to the flexible element webs / pockets and to the cams and the outer circumference.

  • Page 28: Assembling The Coupling

    Assembly 5.2 Assembling the coupling Note A better balancing result can be achieved by balancing the coupling parts (2 and 3, 10 and 32) when they are bolted together as an assembly. When balancing all parts together, mark the position of the components relative to one another. Assembling the coupling NOTICE Property damage...

  • Page 29: Aligning The Coupling

    Assembly 5.3 Aligning the coupling 5. Mount the coupling parts 32 (32) and 2 (2) or 4 (4) on the shaft. Note Coupling parts with conical bore Mount the coupling parts 32 (32) and 2 (2) or 4 (4) with conical bore and parallel keyway on the shaft in cold condition.

  • Page 30: Possible Misalignment

    Assembly 5.3 Aligning the coupling You can minimise misalignment by aligning after assembly. A lower misalignment in the coupling has the following advantages: • Reduced wear of the elastomer components • Reduced restoring forces • Misalignment reserves for operation of the coupling You can find the maximum permitted shaft misalignment values during operation in section Shaft misalignment values during operation (Page 57).

  • Page 31: Radial Misalignment

    Assembly 5.3 Aligning the coupling ΔKw [deg] = (ΔS2 / DA) · (180 / π) If required, you can calculate the permissible angular misalignment ΔKw as follows: perm ΔKw [rad] = ΔS2 / DA perm perm ΔKw [deg] = (ΔS2 / DA) •...
  • Page 32 Assembly 5.3 Aligning the coupling Assembly and operating instructions 3103en Edition 10/2020...

  • Page 33: Commissioning

    Commissioning DANGER Danger due to igniting deposits During use in potentially explosive atmospheres deposits from heavy metal oxides (rust) can ignite due to friction, impact or friction sparks and lead to an explosion. • Ensure through the use of an enclosure or other suitable measures that the deposition of heavy metal oxides (rust) on the coupling is not possible.
  • Page 34 Commissioning Assembly and operating instructions 3103en Edition 10/2020...

  • Page 35: Operation

    Operation Normal operation of the coupling The coupling runs quietly and shock-free during normal operation. Faults - causes and rectification A form of behaviour which is different to normal operation is classed as a fault and has to be rectified immediately. Look out specifically for the following faults during coupling operation: •...

  • Page 36: Identifying The Fault Cause

    Operation 7.2 Faults - causes and rectification 7.2.2 Identifying the fault cause Faults occur frequently due to application errors or they occur due to operational circumstances such as wear of wearing parts or changes to the system. The faults and fault causes listed below only serve as an indication for troubleshooting. In the case of a complex system be sure to include all the system components in the search for the fault.

  • Page 37: Possible Faults

    Operation 7.2 Faults - causes and rectification 7.2.2.1 Possible faults Table 7-1 Table of faults Fault Cause Rectification Sudden changes in the noise level and/or Wear of wearing parts Follow the instructions given in sudden occurrences of shocks section Replacing wearing parts (Page 39).

  • Page 38: Possible Causes

    Operation 7.2 Faults - causes and rectification 7.2.2.2 Possible causes Unsuitable coupling • Important information on the description of the drive unit and the environment were not available when the coupling was chosen. • System torque too high and/or torque dynamics not permissible. •...

  • Page 39: Correcting Faults

    Maintenance-related causes • Stipulated maintenance intervals not adhered to. • Spare parts that were used were not original spare parts from Flender. • Flender spare parts that were used were old or damaged. • Leak in the area of the coupling not detected so that chemically aggressive substances damage the coupling.
  • Page 40 Operation 7.2 Faults - causes and rectification 3. Check the locking elements that prevent axial movements and correct these as required. 4. Realign the coupling. Assembly and operating instructions 3103en Edition 10/2020...

  • Page 41: Servicing

    Servicing Maintenance intervals DANGER Danger due to bursting of the coupling The coupling can burst if the maintenance intervals are not adhered to. There is a risk of fatal injury from flying fragments. Bursting of the coupling can lead to an explosion in potentially explosive atmospheres.

  • Page 42: Maximum Permissible Torsional Backlash

    Servicing 8.3 Replacing wearing parts Maximum permissible torsional backlash In order to calculate the torsional backlash, rotate one coupling part without applying torque up to the stop. Mark both of the coupling halves in the way shown in the diagram below. Turn the coupling part in the opposite direction up to the stop.

  • Page 43: Removing The Coupling

    Servicing 8.4 Removing the coupling Type P Replace the flexible elements (12) without moving the coupled machines. 1. Undo the connection between coupling parts 2 (2) and 3 (3). 2. Move the coupling part 3 (3) axially. The flexible elements (12) are freely accessible after coupling part 2 (2) has been turned. 3.
  • Page 44 Servicing 8.4 Removing the coupling 5. Heat up the coupling parts 32 (32) and 2 (2) or 4 (4) using a burner above the parallel keyway along its length to maximum 80 °C. Note when doing this the temperature range of the flexible elements (12) (refer to section N- EUPEX flexible elements (12) (Page 59)).

  • Page 45: Service And Support

    When ordering spare parts, requesting a customer service technician or in the case of technical queries, please contact our factory or one of our customer service addresses: Flender GmbH Schlavenhorst 100 46395 Bocholt Germany Tel.: +49 (0)2871/92-0 Fax.: +49 (0)2871/92-2596 Flender GmbH (http://www.flender.com) Assembly and operating instructions 3103en Edition 10/2020...
  • Page 46 Service and support Assembly and operating instructions 3103en Edition 10/2020...

  • Page 47: Disposal

    Disposal Disposal of the coupling Dispose of the coupling parts according to applicable national regulations or recycle them. Assembly and operating instructions 3103en Edition 10/2020...
  • Page 48 Disposal Assembly and operating instructions 3103en Edition 10/2020...

  • Page 49: Spare Parts

    Flender will accept no liability or warranty whatsoever for damage occurring as a result of the use of non-approved spare parts. The same applies to any accessories that were not supplied by Flender.

  • Page 50: Spare Parts Drawing And Spare Parts List

    Spare parts 11.2 Spare parts drawing and spare parts list • Any special properties of the spare part, such as, for example: – Temperature resistance – Electrical insulation – Operating fluid – Use in potentially explosive atmospheres • Quantity 11.2 Spare parts drawing and spare parts list 11.2.1 Type O...

  • Page 51: Type P

    Spare parts 11.2 Spare parts drawing and spare parts list 11.2.2 Type P Figure 11-2 Spare parts drawing for type P Table 11-2 Spare parts list for type P Part number Designation Coupling part 2 Coupling part 3 Coupling part 10 Flexible element Cylinder-head screw Cylinder-head screw...
  • Page 52 Spare parts 11.2 Spare parts drawing and spare parts list Assembly and operating instructions 3103en Edition 10/2020...

  • Page 53: Technical Data

    Technical data Speeds, geometry data and weights In this section you can find dimension drawings and technical data for N‑EUPEX couplings of the following types: • Type O (Page 54) • Type P (Page 56) Assembly and operating instructions 3103en Edition 10/2020...

  • Page 54: Type O

    Technical data A.1 Speeds, geometry data and weights A.1.1 Type O Coupling part 4 Coupling part 10 Coupling part 32 Figure A-1 Type O Table A-1 Speeds, geometry data and weights of type O Size Speed Maximum Weight bore max. 4 800 2 …...
  • Page 55 Technical data A.1 Speeds, geometry data and weights Size Speed Maximum Weight bore max. 2 400 3 … 8 60 … 65 1 900 2 400 3 … 8 63 … 68 1 900 65 … 70 1 500 65 … 70 Maximum bore for parallel keyway in accordance with DIN 6885/1.

  • Page 56: Type P

    Technical data A.1 Speeds, geometry data and weights A.1.2 Type P Coupling part 2 Coupling part 3 Coupling part 10 Coupling part 32 Figure A-2 Type P Table A-2 Speeds, geometry data and weights of type P Size Speed Maximum Weight bore max.

  • Page 57: Shaft Misalignment Values During Operation

    Technical data A.2 Shaft misalignment values during operation Size Speed Maximum Weight bore max. 2 400 3 … 8 63 … 68 1 900 65 … 70 1 500 65 … 70 2 400 3 … 8 70 … 75 1 900 1 500 1 300...

  • Page 58: Tightening Torques And Widths A/F

    Technical data A.4 Tightening procedure The values in column "250 rpm" of the table above apply for speeds of < 250 rpm. Tightening torques and widths A/F Table A-4 Tightening torques for parts 13 and 23 of types O and P N‑EUPEX- Tightening torque T and width A/F SW for...

  • Page 59: Flexible Elements (12)

    Technical data A.5 Flexible elements (12) Flexible elements (12) A.5.1 Use and storage of flexible elements (12) Note the following concerning the use and storage of the flexible elements (12): • Storage possible for up to 5 years • Protect against direct sunlight, artificial light with a high UV‐content and extreme temperatures •...
  • Page 60 Technical data A.5 Flexible elements (12) Material Hardness Comment Marking Ambient tempera‐ Approved for ture explosion group HNBR 80 Shore A Special, Black flexible elements -10 °C to +100 °C Not approved with high-temperature use red stripe 80 Shore A Special, Green flexible elements -30 °C to +80 °C...

  • Page 61: B Quality Documents

    Quality documents EU declaration of conformity ® Assembly and operating instructions 3103en Edition 10/2020...
  • Page 62 Quality documents B.1 EU declaration of conformity Assembly and operating instructions 3103en Edition 10/2020...
  • Page 64 FLENDER COUPLINGS N-EUPEX Assembly and operating instructions 3103en Edition 10/2020 Flender GmbH Alfred-Flender-Straße 77 46395 Bocholt GERMANY...

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