Replacement of segments-CÁC BƯỚC THAY ĐĨA NGHIỀN SỢI MDF

Remove the nuts and screws A and B in the disc housing screw joint.2.Remove all but two of the screws O for the segment holder of the rotor.. The two remaining screws should be removed,

Replacement of segments

-Tools :hoist ,spanner, impact wrench, torque wrench, air pipe.

- Man power : 3 persons.

- Replacemet part : segment, heil-coil.

- Dismounting of segment

1.Dismount the defibrator disc housing cover Remove the nuts and screws (A and B) in the disc housing screw joint.

2.Remove all but two of the screws (O) for the segment holder of the rotor The two remaining screws should be removed, when the rotor holder has been secured to the lifting equipment (tool (R) and the hoist)

4 Tighten the vertical adjusting screw towards the rotor slightly by hand if

needed Attach the lifting tool with rotor segment holders to a suitable hoisting equipment (weights, see “Technical

data”).

3 Attach the lifting tool (R) to

the rotor segment holder only.

Approximate weights<kg>

EVO 64

6.Cautiously move the lifting tool with the rotor holder (about 2mm)

against the stator with the hoisting equipment, and check that the segment

cautiously on the screw (O)

of the rotor

A B C D E F G K L M N O P Q R S

Nuts Screw Disc housing cover Rotor

Segment holder, rotor Segment holder, stator Stator and disc housing Screw, segment

Screw, segment holder stator Screw, segment

Screw, segment Screw, segment holder rotor Sealing ring and disc housing Clamp

Lifting tool TVD

them

to a suitable place for segment replacement

• Cleaning

-If the parts are hot flush the disc housing with air When the parts are below 80°C water can

be used for cleaning.

-Clean all contact surfaces between the

Defibrator and segment holders with a non abrasive tool

-Also clean the screws and remove any dirt and fiber in the disc housing.

-Mounting of segment holders

• Note

 Use the lifting eye for two holders.

 Lubricate all screws before mounting Also check that the wear screws (Y), if any ,are not damaged

1 Lift the segment holders with new segments into the disc housing with the lifting tool (R) Move the segment holders towards the stator of the grind disc housing Align the attachment holes (L) in the gr disc housing with the holes in the stator segment holder.

Screw

Disc housing cover

Rotor

Segment holder, rotor

Segment holder, stator

Stator and disc housing

Screw, segment

Screw, segment holder stator

Screw, segment

Screw, segment

Screw, segment holder rotor

Sealing ring and disc housing

Lift the hoist to eliminate the slack Unscrew the bolt that holds the lifting tool to the stator segment holder and also remove the clamps(Q)

to

correct torque, see “Technical data”

Tightening torques EVO 64

Nuts Screw Disc housing cover Rotor

Segment holder, rotor Segment holder, stator Stator and disc housing Screw, segment

Screw, segment holder stator Screw, segment

Screw, segment Screw, segment holder rotor Sealing ring and disc housing Clamp

Lifting tool TVD

A B C D E F G K L M N O P Q R S

4 Move the lifting tool with the rotor segment holder attached and bring them towards the rotor Take care that the center spigot of the segment holder guides into the center of the shaft correctly

5 Tighten 2 of the segment holder screws (O) Take care that the center spigot of the segment holder guides into the shaft end

correctly

7

6 Remove the lifting tool (R)

• 7 Tighten the remaining screws (O,16pcs.)

to correct torque,see “Technical data”.

housing and disc housing cover.

Replace, if necessary.

correct torque, see Technical data”.

• Stator:

 The segments for the stator side are not balanced and do not need

to be mounted in any specific order.

• 1 Mount the center ring and tighten all screws to correct torque, see “Technical data”.

• 2 Mount the P-segments with equal distances and tighten the

screws slightly Push them outwards towards the guiding support.

• 3 Mount the C-segments between the P-segments and the center plate with equal distances and tighten the screws slightly (C

segments is only applicable at sizes above 58”)

• 4 Tighten all screws to correct torque, see “Technical data”.Store segment holders with new segments in a dry place and in an area where there is no risk of damage.

Replacement of mechanical seal

• 1 Turn off the water and steam supply and remove the hoses from the mechanical seal Plug all connection to prevent dirt from

entering the system.

• 2 Remove the disc housing cover.

• 3 Remove the rotor, see “Replacement of

rotor”.

• 4 Loosen the mechanical seal from the front end cover i.e remove the four screws.

High pressure pump

High pressure pipe

seal housing The split ring now serves also as a “locking device”, which

7 Remove the oil plug, marked “S”, in the shaft end and mount the oil nipple and the high pressure pump.

8 Strap the mechanical seal to a lifting device.

9 Press in oil with the high-pressure pump

between the shaft and the seal At the same time tighten the nuts of the pull rods(13) in order to pull off the seal.

•

10. Pull off the seal from the shaft and slide it out through the milling house on the plastic slide.

11. Place the seal on its rear and remove one of the split ring

halves(6) and replace it by two of the locking washers Proceed in

the same way with the other half.

12. Do not disassemble the seal, but send it to Metso Paper for

reconditioning.

1 2 3 4 5 7 9 11 12 16 18

High pressure pump High pressure pipe Hudraulic nut Shaft

Washer Oil nipple Sleeve Nut 2”

Washer

O ring Sleeve

Shaft

Mounting of mechanical seal

• A new seal should not be dismounted but be

mounted as a unit At delivery it is equipped with six locking washers (I), tightened by screws to keep the sleeve with slide rings together in the seal housing These washers should not be removed before the seal has been pushed up on the shaft The seal is

mounted on the shaftwith a press fit.

1 Carefully clean the shaft and the front end cover

2 Oil the shaft slightly

positioned Push the seal manually through the milling house on the plastic

(11) on the shaft

high-pressure pump

1 2 4 5 7 9 11 12 16 18

High pressure pump High pressure pipe Shaft

Washer Oil nipple Sleeve Nut 2”

Washer

O ring Sleeve

6 Fit the four screws (J) in the mechanical seal (B) and check that they coincide with the holes in the front end cover (A).

the shaft and seal Push up the seal onto the shaft

nut (11) until the front edge of the washer is flush with the shaft end

shaft end

12 Connect the sealing water hoses.

(Z) on the shaft and position the measuring end perpendicularly to the front

of the seal Rotate on full turn

min 0.5 mm all round