mnsg 65446-2-en-0704.pdf

8/10/2019 MNSG 65446-2-en-0704.pdf

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Bühler AG

CH-9240 Uzwil, Switzerland

Phone +41 71 955 11 11

Fax +41 71 955 33 79

www.buhlergroup.com

Operating instructions

MNSG-65446-2-en-0704

Tubular screw conveyorMNSG

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© Copyright Bühler AG/GmbH en

Prerequisites for the EU conformity – Addendum

According to the representation in the present operating instructions the protectiontarget defined in the safety analysis for the prevention of risks while carrying outmaintenance work is achieved by installing a lockable safety switch and the

operating personnel is in possession of a key for it.It is possible to diverge from this technical solution in cases where anothertechnical safety measure - being allowed by the machine guideline and ensuringthe protection target defined in the safety analysis in the same way - is selectedand implemented by the user on his own responsibility. In this case, the user has todocument the required measure, along with the necessary safety notes, in hisoperating instructions where his operating personnel can check it, and the user hasto inform and train his personnel accordingly. To be on the safe side, such adiffering measure has to be coordinated by the user with the competent authorityfor safety at work or other competent authorities.

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2 Tubular screw conveyor

MNSG-65446-2-en-0704 © Copyright 2007 Bühler AG

Preface

The operating instructions have to be handed over to those persons who areresponsible for the operation and the supervision of the machine.This operating manual includes the information necessary for the operator for instal-lation, operation and maintenance.

We have refrained from describing tasks requiring no special knowledge.Instructions for repairs exceeding the normal maintenance tasks are not provided.

Important information

• Procedures upon receiptInspect the equipment visually in accordance with the delivery contract as soonas it has been received.

• StorageEquipment that is not installed immediately must be stored protected fromweather and other influences.

• Installation

The assembly and installation of the machine and machine equipment mustonly be carried out by observing all installation instructions provided.

• Design variantsIf different designs are described in the documentation provided, only the infor-mation concerning the version supplied will apply. We reserve the right to makemodifications due to technical progress up to the time of delivery.

• Duty of instructionOnly trained specialists are permitted to commission the system or carry outmaintenance work on it. Prior to initial start-up, the operating personnel arerequired to become familiar with the documentation provided.

Additional documents

Designation Identification number

Machine spare parts catalog MNSG-7826-1

Screw outlet slide gate MUFA-65890

Screw outlet slide gate spare parts MUFA-8049

Shutoff slide gate spare parts MWSB-7982

Gearmotor Refer to the documentation provided bythe manufacturer.

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Tubular screw conveyor Table of contents 3

© Copyright 2007 Bühler AG MNSG-65446-2-en-0704

Table of contents

1 Safety ........................................................................................................................ 5

1.1 Explanation of safety instructions ................................................................................................. 5

1.2 Safety of personnel....................................................................................................................... 5

1.3 Connecting to the electrical mains................................................................................................ 6

1.4 Explosion protection ..................................................................................................................... 6

1.5 Safety concept .............................................................................................................................. 6

1.6 Spare and wear parts ................................................................................................................... 6

2 Description ............................................................................................................... 7

2.1 Identification ................................................................................................................................. 7

2.1.1 Identification plate ............................................................................................................ 7

2.1.2 Specification key............................................................................................................... 7

2.1.3 Design variants................................................................................................................. 7

2.2 Designated use............................................................................................................................. 8

2.2.1 ATEX authorisation........................................................................................................... 8

2.3 Design and elements.................................................................................................................... 9

2.3.1 Inlets and outlets ............................................................................................................ 10

2.3.2 Gravity spout and sleeve connection.............................................................................. 12

2.3.3 External pipe and tension ring........................................................................................ 12

2.3.4 Drive and end plate assembly ........................................................................................ 12

2.3.5 Screw shaft, connection and coupling pin ...................................................................... 13

2.3.6 Intermediate and end bearing ........................................................................................ 13

2.4 Connecting several tubular screw conveyors.............................................................................. 14

2.5 Technical data............................................................................................................................. 15

2.5.1 High-capacity inlet.......................................................................................................... 15

2.5.2 Power supply .................................................................................................................. 15

2.5.3 Weights .......................................................................................................................... 15

2.5.4 Noise data ...................................................................................................................... 15

2.6 Dimensioned drawing ................................................................................................................. 16

3 Transport ................................................................................................................ 17

3.1 Crane suspension....................................................................................................................... 17

3.2 Transport weights and volumes .................................................................................................. 17

4 Installation.............................................................................................................. 19

4.1 Site requirements ....................................................................................................................... 19

4.2 Installation .................................................................................................................................. 19

4.2.1 Suspension / support ..................................................................................................... 19

4.2.2 Installation sequence...................................................................................................... 20

4.3 Chain transmission ..................................................................................................................... 22

4.4 Drive ........................................................................................................................................... 22

4.4.1 Gearmotors .................................................................................................................... 22

4.5 Screw outlet slide gate ............................................................................................................... 224.6 Bearing air cleaning.................................................................................................................... 23

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4 Table of contents Tubular screw conveyor


4.7 Options ....................................................................................................................................... 23

4.7.1 Capacitive probe on high-capacity inlet.......................................................................... 23

4.7.2 Rotary vane probe (limit switch) on high-capacity inlet .................................................. 23

4.7.3 Clean-out cover .............................................................................................................. 24

4.7.4 Rotary vane probe (limit switch) on outlet ...................................................................... 244.8 Energy connection ...................................................................................................................... 24

4.9 Earthing ...................................................................................................................................... 25

5 Commissioning.......................................................................................................27

5.1 Checks before start-up ............................................................................................................... 27

5.2 Verifying EC conformity .............................................................................................................. 28

5.3 Adjusting the probe..................................................................................................................... 28

6 Operation.................................................................................................................29

6.1 Operation.................................................................................................................................... 29

6.2 Conveying properties.................................................................................................................. 29

6.3 Faults and troubleshooting.......................................................................................................... 29

7 Maintenance............................................................................................................31

7.1 Maintenance plan ....................................................................................................................... 31

7.2 Lubrication schedule................................................................................................................... 32

7.3 Lubrication .................................................................................................................................. 32

7.4 Lubricants table .......................................................................................................................... 33

7.4.1 Drive ............................................................................................................................... 33

7.4.2 Roller bearings on the drive............................................................................................ 33

7.4.3 Chain transmission......................................................................................................... 33

7.5 Cleaning...................................................................................................................................... 33

8 Decommissioning...................................................................................................35

8.1 Disassembly ............................................................................................................................... 35

8.2 Disposal ...................................................................................................................................... 35

9 After-sales service..................................................................................................37

9.1 Spare parts ................................................................................................................................. 37

9.2 Contact ....................................................................................................................................... 37

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Tubular screw conveyor Safety 5


1 SafetyThe machine was designed and manufactured in compliance with recognised safetyregulations. In spite of this, inappropriate use can put the user at risk of injury. Forthis reason, safety has been given the highest priority.

1.1 Explanation of safety instructions

The corresponding safety instructions are indicated as follows:

1.2 Safety of personnel

• Protective covers, hoods and gates must be installed and closed at all times.

Open or missing safety covers are danger spots for crush and cut injuries.• Always keep safety devices in good working condition. Never bypass or disableany safety devices.

• The system must be brought to a standstill before any maintenance work maybe carried out on the machine!Make sure that all energy sources such as:

– Electricity

– Pneumatics

are switched off and disconnected. The lockable safety switch, which interruptsthe power at all poles, must be set to “0” and locked.

Danger!

Indicates an imminently hazardous situation which, if not avoided, can resultin death or grave injury.

Caution!

Indicates a potentially dangerous situation which, if not avoided, can result in prop-erty damage and production failures.

Explosion hazard!

Indicates a potentially explosive situation which, if not avoided, can result in seri-ous or fatal injuries and extensive property damage.

Note:

Indicates important information or instructions which, if not observed, can impairthe correct function of the machine and make it impossible to attain performanceparameters.

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6 Safety Tubular screw conveyor


1.3 Connecting to the electrical mains

• Observe the regulations of the local safety authorities.

• The power supply has to be fuse-protected in accordance with locally applicablecodes and regulations.

• Check that the operating voltage and frequency correspond to the ratings pro-vided on the identification plate and in the control cabinet.

• The electrical wiring to the control system must be connected according to thewiring diagram to ensure that the phase conductors are really switched in thecase of single-phase power supplies.

1.4 Explosion protection

Only explosion-proof machines and devices may be used in Ex zones. For the defi-nition of the ATEX authorisation for this machine, refer to Chapter 2.2.1, 8.

1.5 Safety concept

The machine is normally part of an installation, and therefore has to be integrated

into the safety concept of the installation.

1.6 Spare and wear parts

Only original spare and wear parts may be used.If this is not complied with, safe operation is no longer guaranteed, particularly if themachine is used in an Ex zone.

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Tubular screw conveyor Description 7


2 DescriptionThe machine is used:

• As a feeder screw, extraction screw or conveyor screw with multiple inlets andoutlets.

• For horizontal, inclined ascending, or vertical conveying.With the flexible mechanical conveyor element, even complex configurations arepossible by combining different parts.

The machine is available in any length up to 12 m in standard steel and corrosion-resistant versions.

2.1 Identification

2.1.1 Identification plate

The data indicated by “” are specific to the individual machine and are imprintedon the identification plate.

2.1.2 Specification key

2.1.3 Design variants

Note:

Do not remove or cover up the identification plate.

Fig. 2.1

II */** EEx * T=*°C *

2

3

4

1

(1) Place of manufacture (2) Type (3) Machine No.(4) Definition of ATEX ID

MNSG - 250 - Ex

Machine approved for use in potentially explosivezone

Outside diameter of the ribbon flight [mm]Code

Type Ribbon flight Ø

MNSG 100 160 200 250

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8 Description Tubular screw conveyor


2.2 Designated use

The machine is intended exclusively for conveying floury, fine and coarse-grainedbulk materials in the area of application as defined in the contract. Any other useshall be considered noncompliant use.

2.2.1 ATEX authorisation

In areas where there is a risk of explosion, only machines and devices that areapproved for this purpose may be used (see identification plate) .

If this symbol appears on the identification plate, the machine may be used in an Exzone.This symbol is followed by the ATEX ID, which indicates the Ex zone in which themachine may be used.

Example:

2/3D means that the machine may be connected on the process side to anEx zone 21 and installed (used) in an Ex zone 22.

Device categories and their approval:

Depending on its construction, the inside of the machine conforms to ATEX devicecategory 1, 2 or 3 and may be connected to the corresponding Ex zone only if thefollowing safety regulation is fulfilled.

II 3/3D EEx c 140°C X

Identifier for operating instructionsMaximum surface temperature to be expected innormal operation at full loadIgnition protection classDevice category *Device groupEx symbol

* If the Ex symbol is followed by 2 digits separated by a slash, the first digit is theinternal category and the second is the external category.

Area Device category Ex zone

D for dust 1D 20

2D 21

3D 22

G for gas 1G 0

2G 1

3G 2

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2.3 Design and elements

Explosion hazard!

Before machines with internal Ex zone can be connected to an installation, it mustbe ensured on the installation side that no effective sources of ignition, metal partsor stones can enter the machine from the system.Failure to comply with this regulation can cause severe injury or property damage.

Fig. 2.2

1

23

5

87

4

64

(1) Drive unit (2) Inlet (3) Outer pipe (4) Tension ring

(5) Outlet (6) End plate assembly (7) Screw shaft (8) Intermediate bearing

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2.3.1 Inlets and outlets

High-capacity inlet

For unmetered product flow. Available with sight glass, filter plate, capacitive orrotary vane probe.

Inlet / outlet

For metered product flow. Is used as an inlet, intermediate inlet or outlet.

Inlet trough

For unmetered product flow under a bin or conveying over a steep rise.

Metering outlet

For axial feed into a bin. The blades (1) ensure uniform product discharge.

For precision metering, use an optional shutoff slide gate (2).

Fig. 2.3 High-capacity inlet Fig. 2.4 Inlet / outlet

Fig. 2.5 Inlet trough Fig. 2.6 Metering outlet

1

2

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Saddle inlet / outlet

Available with cover (1), clean-out cover (2) or rotary vane probe (3).

Baffle flap for saddle outlet

Prevents trickling of bulk material.

Slide gate outlet

Can be attached in any position of the tubular screw conveyor.

(For screw outlet slide gate, see operating instructions MUFA-65890)

Fig. 2.7

1

2

3

Fig. 2.8

Fig. 2.9

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2.3.2 Gravity spout and sleeve connection

The spout connection (1) and the sleeve connection (2) are transfers to the roundinlets and outlets.

2.3.3 External pipe and tension ring

The interface between the elements is the tension ring connection (1) with seal (2).

Two outer pipes are connected with a coupling ring (3).

The outer pipes are available in three variants: A-pipe (4), B-pipe (5) and

C-pipe (6). The maximum length of an outer pipe is 3 m.

2.3.4 Drive and end plate assembly

The direct drive unit (1), chain transmission (2) and the end plate assembly (3) areinstalled on the inlet or outlet side, depending on the version. Air purging is used toprotect the bearings, depending on the product.

Fig. 2.10

12

Fig. 2.11

4

5

6

2

3

1

Fig. 2.12

1

23

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2.3.5 Screw shaft, connection and coupling pin

Right-handed screw shafts (1) are available with various pitches.

The pitch of the standard screw shaft corresponds to the spiral diameter (P = 1*D) .Other available pitches are P = 0.3, 0.5 and 0.7 *D.

Progressive screw shafts are used in the inlet for unmetered product intake.

The maximum length of screw shafts is 2.95 m. They are supported and connectedwith an intermediate bearing.

2.3.6 Intermediate and end bearing

The intermediate bearing (1) simultaneously connects and provides bearing supportfor two screw shafts. The end bearing (2) is the last bearing in metering outlets andacts as a floating bearing. Air purging for bearings is available as an option for par-ticularly fine-grained material.

Fig. 2.13

1 2 3

(1) Screw shaft (2) Connection pin (3) Coupling pin

Fig. 2.14

1 2

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2.4 Connecting several tubular screw conveyors

Two machines can be connected to each other at a 90° angle, with one feeding theother. The rotary flange (1) and T-inlet (2) form the connection. The couplingscrew (3) ensures correct feed. The radial centrifuge (4) is used for vertical convey-ing and a thrust bearing (5) is used for heights over 6 m.

The cross piece (6) is used if a tubular screw conveyor is fed by two screws at a90° angle.

Fig. 2.15

Fig. 2.16

3 1

5

2

4

6

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2.6 Dimensioned drawing

Fig. 2.17

MNSG- ØD ØDN1 ØDN2 ØA ØB ØC D E Le Lmax

[mm] [m]

100 100 200110

110 270185

160 260 400 – 900 12200 270

160 160200

200 170270

270 270 370 400 – 1200 12300 370

200 200 500200

210 570270

320 420 600 – 1500 12300 370

250 250500

300 260570

370 390 490 600 – 1800 12600 670

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Tubular screw conveyor Transport 17


3 TransportAllow personnel to transport the system only if they are familiar with the task andhave received proper training.

• The machine is assembled in lengths of up to 6 m. For lengths over 6 m, divide

the machine for transport.• Bring the inlets and outlets into a suitable position for transport. Once the

machine is at the installation location, return them to their proper position bydetaching the corresponding tension elements.

3.1 Crane suspension

3.2 Transport weights and volumes

See also Chapter 2.5.3, 15.

Danger!

Never walk beneath suspended loads.

Caution!Check to ensure that the crane and lifting gear are designed such that they canbear the load, and verify their maximum permitted load.

Note:

Always observe the transport weights provided by the forwarder in the shippingdocuments.

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18 Transport Tubular screw conveyor


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Tubular screw conveyor Installation 19


4 Installation

4.1 Site requirements

Space requirements, floor openings, bearing surfaces and floor loads are in accord-

ance with separate planning documents.

4.2 Installation

• Block the assembly area against unauthorised access.

• Secure the surrounding area (remove any items that could cause someone tostumble etc.) .

• Allow sufficient clearance for performing installation and set-up tasks.

• Check elements for deformation. Carry out straightening work before assembly.

• Check the roundness of the external pipes and straightness of the screw shaft.

4.2.1 Suspension / support

Suspend or support the machine in any desired location on the external pipe usingpipe clamps (1).

Caution!

Improper installation of the progressive screw shaft or imbalanced operation of thescrew causes smouldering nests or smouldering fire.

Fig. 4.1

1

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20 Installation Tubular screw conveyor


4.2.2 Installation sequence

1. Pre-assemble the screw shafts (1), intermediate bearings (2), drive trunnion (3)and end trunnion (4).

– If a progressive screw shaft (5) is present, ensure that the installation posi-tion is correct.

– Use a suitable lubricant for the connections to prevent fretting corrosion.

2. Pre-assemble the drive unit (1), inlet (2), external pipes (3) and outlet (4) usingthe tension rings (5).

– Do not deform the tension rings while tightening them.

– The welding seam on the external pipes should be facing upwards.

Fig. 4.2

Fig. 4.3

3

5

2

1

4

C o n v

e y o r d i r e

c t i o n

5

4

32

1

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3. Insert the pre-assembled screw shaft into the inlet side as far as they will go.

– Be sure not to damage the intermediate bearing or its housing.

– Turn the screw shaft slightly during insertion to prevent it from seizing.

4. Install the end plate assembly (1) and / or dispensing outlet.

5. Tighten the locking ring (4) of the flange bearing (2) on the drive end and secureit using the threaded pin. The flange bearing (3) or end bearing acts as afloating bearing.

6. Install the feather key (5) on the drive trunnion.

7. Secure the intermediate bearings on the external pipe using a hexagon bolt(M8 x 16) to prevent them from twisting. Refer to the separate assemblydiagram for the distances between tapped holes on the external tube. A lockingsquared ring prevents the screw from coming loose.

8. Carry out a function check by turning the screw shaft. The screw shaft must notscrape against the inlet, outlet or external pipes.

9. When lifting the completely assembled tubular screw conveyor, suspend it at

least every 6 m (see Chapter 4.2.1, 19 ) .

Fig. 4.4

Fig. 4.5

1

3

245

Screw fitted at 45° to the axis

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4.3 Chain transmission

Tighten the chain by shifting the gearmotor (1).

Position the gear rims of the chain wheels one above the other and secure them onthe respective shafts using the tightening bushes (2).

Tensioning the chain:1. Unscrew the fastening screws (3) on the gearmotor.

2. Move the gearmotor using the eccentric screw (4). Use a hexagon socketwrench to manipulate the eccentric screw.

3. Tension the chain until it can be moved slightly by hand (approx. 10 mm) .

4.4 Drive

When the drive is delivered in dismantled condition, install it according to the manu-facturer’s specifications.

4.4.1 Gearmotors

Preparation

• The specifications on the identification plate of the drive match the mains volt-age grid.

• Remove all corrosion inhibitors from the power take-off shaft and flange sur-faces (use a commercially available solvent) . Do not allow solvent to contact thesealing lips of the shaft seals (material damage) !

• Before operation, replace the screw plug with the exhaust screw or the exhaust

valve provided. The screw plug is identified by a plastic plug.• Use the materials prescribed for installation.

4.5 Screw outlet slide gate

Refer to separate operating instructions MUFA-65890.

Fig. 4.6

1

24

3

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4.6 Bearing air cleaning

The solenoid valve of the air purging system is triggered when the motor is running.

4.7 Options

4.7.1 Capacitive probe on high-capacity inlet

The probe (1) signals a low level of the high-capacity inlet.

It does not function as a personal protection device.

4.7.2 Rotary vane probe (limit switch) on high-capacity inletThe rotary vane probe is used for non-freeflowing products and signals a low levelof the high-capacity inlet.

It does not function as a personal protection device.

Fig. 4.7

Fig. 4.8

1

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4.7.3 Clean-out cover

The positioning switch on the clean-out cover functions as a personal protectiondevice.

When the clean-out cover is lifted, the electric circuit to the motor contactor is inter-rupted.

4.7.4 Rotary vane probe (limit switch) on outletThe rotary vane probe is used for non-freeflowing products and is adjusted suchthat in case of a product back-up, the motor is switched off by the control systemwithin 2 seconds. It does not function as a personal protection device.

4.8 Energy connection

Only personnel who have been trained and authorised to do so may carry out theelectrical installation.

Fig. 4.9

Switchpoint inaccordance withEN 50041

Switching travel instroke direction

Switchpoint at return

Positive opening

Switching state:ClosedOpen

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4.9 Earthing

Direct drive with spur gear unit

Chain transmission

Fig. 4.10 Flanged Fig. 4.11 On foot

Fig. 4.12

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Tubular screw conveyor Commissioning 27


5 CommissioningOnly personnel who have been trained and authorised to do so may start up themachine, perform test runs and make adjustments.

5.1 Checks before start-up

• All transport aids and installation fasteners have been removed.

• The electrical installation has been carried out and checked by a qualified elec-

trician:– Electrical connections and connection voltages

– Earthing of the machine (see Chapter 4.9, 25 )

– Direction of rotation of the motors

• All operating elements and warning systems are fully functional.

• A lockable safety switch that interrupts the power at all poles is installed and thepersonnel possess a lock for this switch.

• All screw unions are tightened securely.

• There are no foreign objects in the machine.

• All electrical terminal boxes and sockets are closed.

• All oil levels have been checked and the correct oil has been used.

• All gearmotors, bearings etc. have sufficient lubricant.

• The Vbelt has the correct tension.

• All line connections are properly sealed.

• The screw shaft must rotate counter-clockwise in the conveyor direction.

• The ribbon flight must not scrape against the housing.

• Check the lubrication of the flange bearings.

• For the chain drive, check the required chain tension and correct it if necessary.

• If present: The progressive screw shaft must be installed such that the pitchincreases in the conveyor direction.

• If present: The vanes of the rotary vane probe, when ready for operation, mustrotate.

• If present: The compressed air of the bearing air cleaning must not contain anymoisture.

• The rotating shaft ends are covered by a protection cap.

Danger!Never perform any of these inspection tasks unless the machine is com-pletely stationary (stop all machine movements) .

The safety switch, which interrupts the power at all poles, must be set to “0”and locked.

Operate the machine only if the safety devices are functional and protectivecovers and panels are intact.

Note:

Before conveying product for the first time, allow the tubular screw conveyor to runin no-load operation for one to two hours. While this is taking place, check the gearand motor for heating. Check all screw connections and the suspension / supportfor any loosening.

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28 Commissioning Tubular screw conveyor


5.2 Verifying EC conformity

Within the territory of the EU, operation of the machine may begin only after its ECconformity has been checked and confirmed in accordance with the checklist.

Checklist

1. The management has been informed that the operating instructions must beaccessible to the personnel at all times, and that management is responsible forappropriate training of its personnel.

2. Assembly and installation are performed in accordance with the operatinginstructions.

3. Safety and monitoring elements have been connected properly and checked forproper functioning.

4. A lockable safety switch that interrupts the power at all poles is installed and thepersonnel possess a lock for this switch.

5. Electrical lines to the machine, and those on the unit itself, are connectedproperly and in accordance with the schematic for the installation (check the

correct position of the bevels) . They are protected from electrical shock and

short-circuits in accordance with locally applicable safety regulations.

6. All covers are properly mounted and locked. The warning sign shown below isattached to each cover in a clearly visible location.

5.3 Adjusting the probeAdjust the sensitivity using the adjusting screw on the capacitive probe. The LEDshows the switchpoint.

Machine part

Chain cover

Clean-out cover

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Tubular screw conveyor Operation 29


6 Operation

6.1 Operation

The tubular screw conveyor is operated in series with additional conveying ele-

ments. These are controlled centrally. There are no control elements on the tubularscrew conveyor itself.

Operation is restricted to ensuring that the elevator is running properly and to moni-toring the material supply and delivery. There must be no material back-up at thisstage which could hinder the proper operation of the tubular screw conveyor.

In the event of a material back-up at the outlet, immediate remedial action must betaken in order to prevent damage.

6.2 Conveying properties

The conveying properties of almost all materials change depending on moisture(both the moisture of the material to be conveyed and humidity) , temperature, gran-ulation etc.

Changes to these properties have an effect on the conveying capacity.

Therefore, take precautions to ensure that such changes are limited during convey-ing.

Whenever possible, make sure the tubular screw conveyor is emptied before it isstopped.

6.3 Faults and troubleshooting

(Refer to the separate documentation provided by the manufacturer.)

Fault Cause Remedy

Development of a large

amount of dust in thevicinity of the tubularscrew conveyor

Tension ring or flange connection is

incorrectly installed.

Tightly seal and lock connection.

Tubular screw conveyordoes not convey withmotor switched on.

Screw is clogged. 1. Unclog downstream element.

2. If necessary, switch off themotor and lock the safetyswitch. Remove connectionspout or cover from the outletand clean the screw.

Tubular screw conveyor is empty. Check conveyor element(or machine) on inlet side.

Screw shaft or drive trunnion isbroken.

Repair damage.

Contact after-sales service.

Switch the rotary vane probe on theoutlet or positioning switch in theclean-out cover.

Remedy the cause.

Adjust probe if necessary.

Geared motor defective Refer to the documentationprovided by the manufacturer.

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30 Operation Tubular screw conveyor


The tubular screwconveyor developsunusual noises.

Ribbon flight is scraping against thepipe.

1. Turn the support of theintermediate bearing (star) andallow the other supports to rest

on the outside pipe.2. Loosen and rotate the external

pipe if necessary.

3. If necessary, adjust thestraightness of the screw shaftand the external pipe.

Screw is clogged. 1. Unclog downstream element.

2. If necessary, switch off themotor and lock the safetyswitch. Remove connectionspout or cover from the outletand clean the screw.

Support of the intermediate bearing(star) rotates in the external pipe.

Using a screw, lock intermediatebearing to prevent it from twisting(see Chapter 4.2.2, 20 ).

Intermediate bearing defective. Locate the defective intermediatebearing by listening to the noise andreplace.

Foreign objects in the tubular screwconveyor.

Switch off motor, lock safety switchand remove foreign object(s).

Fault Cause Remedy

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Tubular screw conveyor Maintenance 31


7 MaintenanceOnly personnel who have been trained and authorised to do so may perform main-tenance work on the machine.

7.1 Maintenance planCheck after every maintenance that there are no foreign bodies inside the tubularscrew conveyor.

Danger!Never perform any maintenance, cleaning or overhaul work unless themachine is at a complete standstill (all machine movements have beenstopped) .The lockable safety switch, which interrupts the power at all poles, must beset to “0” and locked.

Caution!

Carrying out maintenance work correctly is the prerequisite for safe and trouble-free operation.

Interval Machine part Action

Daily Bearing air cleaning Check air quality.

Check line for leaks.

Tubular screw conveyor Acoustic check for unusual noises

Every 3 months Chain transmission Check chain tensioner according to Chapter 4.3, 22 “Installing the chain drive”.

Daily Drive ( Chapter 4.4, 22 ) Check gear noise for changes.

Every 3 months Check the oil level.

Check gear for leaks.

At least once ayear

Check that fastening screws are tightened properly.

Annually Electrical control system Perform an operational check of the electrical controlsystem, including the emergency stop, and check thefeedback to the control system. Check the setting ofthe motor fuse.Perform a general check of all electrical equipment andconnections, and of the insulation.

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32 Maintenance Tubular screw conveyor


7.2 Lubrication schedule

7.3 Lubrication

The roller bearings are filled with grease at the factory.

Interval Machine part Action Recommendedlubricant

Quantity[g]

Every 6 months Chain transmission Lubricate chain SeeChapter 7.4.3, 33

Note:

In every case, observe the specific maintenance instructions of the gear manufacturer.

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Tubular screw conveyor Maintenance 33


7.4 Lubricants table

7.4.1 Drive

When selecting an oil, the determining factor is always the oil viscosity specified onthe power plate of the drive (ISO VG class) . The specified viscosity class applies tothe operating conditions as agreed in the contract.

(For additional instructions, refer to manufacturer’s operating instructions.)

7.4.2 Roller bearings on the drive

(For additional instructions, refer to manufacturer’s operating instructions.)

7.4.3 Chain transmission

As the lubricant, use high-viscosity oil with adhesive additives or commercially avail-able chain lubricant. It is important that the lubricant reaches the joint surfaces.

7.5 Cleaning

The tubular screw conveyor is fumigated along with the entire system. Schedulesfor fumigation according to the local regulations.

Lubricat-ing point

Identification according

toDIN 51502

Chain K 2K RUSTICA80 / F

SinitFZL 3

Luca20 - 5.1

PenetratingOil 2

MilcotK 68

AnticoritSG 3

PolyclubKVT 50A

- ? - ? -

Interval Machine part Action

Every 3 months Drive Clean exhaust screw

Depends onlevel of dirtaccumulation

Clean drive

Tubular screw conveyor Clean

Annually Chain transmission Wash out the chain using petroleum ether (not petroleumor diesel oil) and soak it for half an hour in lubricatingsolutions for chains.

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Tubular screw conveyor Decommissioning 35


8 Decommissioning

8.1 Disassembly

When decommissioning the machine (for overhaul, dismantling or disposal pur-

poses) , disassemble it by following the installation steps in reverse order.• Before beginning the disassembly work, the person in charge must obtain the

corresponding instructions for safe disassembly from the manufacturer.

• The machine may be disassembled only in observance of all accident preven-tion measures and only by trained personnel. These personnel must be familiarwith all relevant safety precautions.

8.2 Disposal

Dispose of the machine and its components in accordance with locally applicableregulations.

When decommissioning the machine indefinitely, dispose of all components andmaterials in an environmentally responsible manner and recycle whenever possible:

• Liquids (diesel, motor oil, gear oil etc.)

• Hazardous waste (batteries, electronic parts)

• Remove and separate plastic parts

• Pre-sort metal parts by type of metal

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Tubular screw conveyor After-sales service 37


9 After-sales service

9.1 Spare parts

When ordering spare parts, please refer to the spare parts catalog.

9.2 Contact

Bühler AGCustomer Service Grain ProcessingCH-9240 Uzwil, SwitzerlandPhone: +41 71 955 30 40Fax: +41 71 955 33 05

[email protected]

Bühler AGCustomer Service Engineered ProductsCH-9240 Uzwil, SwitzerlandPhone: +41 71 955 22 44Fax: +41 71 955 36 60

[email protected]

Note:

When contacting Bühler AG, please have available the information on the machineplate which identifies the machine.

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mnsg 65446-2-en-0704.pdf

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