RINGFEDER TNM G User manual

EN
08.2019
Elastomer Jaw Couplings
RINGFEDER® TNM G
Installation and Operation Manual
Partner for Performance www.ringfeder.com

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Content
Chapter
Page
1 Notes on safety ................................................................................................................ 2
2 Function ........................................................................................................................... 3
2.1 Appropriate Use ......................................................................................................... 3
3 Marking of the coupling .................................................................................................... 4
4 Storage............................................................................................................................. 4
5 Construction ..................................................................................................................... 5
6 Technical data .................................................................................................................. 6
7 Assembly .......................................................................................................................... 8
7.1 Pay attention before the assembly ............................................................................. 8
7.2 Finished borehole ....................................................................................................... 9
7.3 Installing coupling ..................................................................................................... 10
8Adjusting coupling .......................................................................................................... 12
8.1 Angular misalignment Kw ....................................................................................... 13
8.2 Radial displacement Kr ........................................................................................... 13
8.3 Axial displacement ................................................................................................... 14
9Operation ....................................................................................................................... 15
9.1 Sense of rotation test ............................................................................................... 18
10 Maintenance ................................................................................................................... 20
10.1 Wear Inspection on the Buffer Ring ......................................................................... 20
10.2 Wear limit of elastic buffers ...................................................................................... 21
10.3 Changing the elastic intermediate ring ..................................................................... 21
11 Waste Disposal .............................................................................................................. 23
1 Notes on safety
The present assembly and operating instruction (AOI) constituents a part of the coupling
supply. Always keep the AOI near the coupling well accessible.
The German version of this manual is the predominant and binding version.
Make sure that all persons charged with the assembly, operating, service, and maintenance
have read and understood the AOI and follow all the points:
-Avert hazards for body and live of the user and third parties.
-Ensure the operating safety of the coupling.
-Avoid the loss of use and environmental impairment through false handling.
In the case of transport, mounting, dismounting and maintenance, attention is to be paid to
the relevant regulations for industrial safety and for environmental care.
The coupling may only be operated, mounted, serviced and maintained by authorised and
trained personnel.
The user must take into account that the bolting elements of coupling parts may be adversely
affected by the heat produced by a brake disk/ brake drum due to the resultant friction. Make
sure that the combination of the employed brake lining with the material of the brake disk/
brake drum does not lead to sparks or impermissible thermal growth. The brake disk is
RINGFEDER® TNM E
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normally made of steel, and the brake drum is normally made of cast iron with nodular
graphite. In case of any doubt, please consult the supplier!
In the interest of further development, we reserve the right to make changes which serve
technological progress.
By the use of accessories and spare parts, which were not originally manufactured by
RINGFEDER POWER TRANSMISSION, we are not responsible for any resulting damage
or liability or guarantee.
2 Function
The coupling RINGFEDER® TNM G is a torsionally elastic and puncture-proof claw
coupling.
It balances out angular, radial, and axial shaft misalignments within defined limits. The
coupling transfers the torque via pressure loadable, elastic buffers or Perbunan (Pb) which
are joined together as an intermediate ring.
The elastic intermediate ring can cushion impacts and torsional vibrations; it is oil-tight and
electrically conductive.
A coupling half is divided in two and allows through this a simple separation of the coupled
machine. With the claw ring pulled back it is possible to check the rotational direction of the
drive. It is also possible to lift out radially a coupling half with accompanying aggregate. The
elastic intermediate ring can be changed without axially shifting the machine.
The coupling is usable in every sense of rotation and installation position.
2.1 Appropriate Use
In order to ensure a faultless, lasting operation of the coupling it must be laid out accord-
ing to the layout instructions e.g. DIN 730 part 2 (or also Product Paper & Tech Paper
”Elastomer Jaw Couplings“) with an operating facture corresponding to the operating
conditions.
The coupling must only be operated in normal industrial atmospheres. Since aggressive
media may attack the coupling components, screws and elastic buffer rings, they
represent a risk for the operational safety of the coupling. Consult RINGFEDER POWER
TRANSMISSION in such cases.
Apart from incorporating a finished bore hole with parallel key groove (see “7.2 Finished
borehole”) no further changes can be carried out on the coupling.
The coupling may only be used within the framework of the conditions defined in the
performance and delivery contract.
Every change of the conditions of use or the operating parameters necessitates a new
verification of the coupling layout.
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3 Marking of the coupling
The product line RINGFEDER® TNM has its hardness in Shore (A) indicated on the elastic
intermediate ring.
4 Storage
On receipt of the goods, the supply is to be checked immediately for completeness and
correctness. Possible damages incurred during transit and / or missing parts are to be
notified in writing.
The coupling parts can be stored in their delivered standard-state for 6 months in a dry,
roofed place at normal room temperature. For a longer storage duration a long-term preser-
vation is necessary (consult RINGFEDER POWER TRANSMISSION). The elastic
intermediate ring must not be subjected to ozone containing mediums, direct solar influence
or strong light sources with ultraviolet-light. The relative humidity must not exceed 65%. In
the case of proper storage the characteristics of the elastic intermediate ring remain
unchanged for almost up to three years.
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Fig. 1 Construction RINGFEDER® TNM G
5 Construction
Details:
Claw ring (Pos. 3) and flange hub (Pos. 4) are delivered screwed together.
Balanced parts are position marked to each other.
1 Pan-head screw DIN 912
2 Locking washer (caging-washer)
3 Claw ring part 102
4 Flange hub part 104
5 Elastic intermediate ring part 010
6 Coupling hub part 101
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6 Technical data
Table 1 Technical data:
Size
TNM
G
TCnom
Pb72
[Nm]
TCpeak
Pb72
[Nm]
TCnom
Pb82
[Nm]
TCpeak
Pb82
[Nm]
nmax
[min-1]
d1
max
[mm]
d2
max
[mm]
d3
[mm]
82
48
100
75
150
8000
32
32
53
97
96
200
150
210
7000
42
39
69
112
150
310
230
540
6000
48
46
79
128
250
500
380
650
5000
55
53
90
148
390
800
600
1350
4500
65
65
107
168
630
1300
980
1800
4000
75
75
124
194
1050
2000
1650
2400
3500
85
85
140
214
1500
3100
2400
4200
3000
95
95
157
240
2400
4800
3700
6200
2750
110
100
179
265
3700
7500
5800
8300
2500
120
115
198
295
4900
10000
7550
10500
2250
130
130
214
330
6400
13000
9900
14500
2000
150
135
248
370
8900
18200
14000
20000
1750
170
160
278
415
13200
27000
20500
27000
1500
190
180
315
480
18000
36000
28000
66000
1400
210
200
315
575
27000
54000
41000
97500
1200
230
260
350
Size Nor-
Mex G
d4
[mm]
d5
[mm]
lE
[mm]
lG
[mm]
LG
[mm]
S1
[mm]
S2
[mm]
m
undrilled
[kg]
82
44,5
82
40
40
92
3,0
12
2,0
97
54,5
97
50
49
113
3,0
14
3,4
112
64,5
112
60
58
133
3,5
15
5,5
128
74,5
128
70
68
154
3,5
16
8,3
148
92,5
148
80
78
176
3,5
18
13,1
168
104,5
168
90
87
198
3,5
21
19,4
194
121,5
194
100
97
221
3,5
24
28,5
214
135,5
214
110
107
243
4,0
26
38,8
240
146,0
240
120
117
267
4,0
30
52,4
265
164,0
265
140
137
310
5,5
33
75,3
295
181,0
295
150
147
334
8,0
37
97,3
330
208,0
330
160
156
356
8,0
40
130,0
370
241,0
370
180
176
399
8,0
43
183,6
415
275,0
415
200
196
441
8,0
45
258,2
480
289,0
480
220
220
485
8,0
45
346,5
575
370,0
575
240
240
525
8,0
45
528,8
Fig. 2 RINGFEDER® TNM G
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The torque TCnom and TCmax. is valid for:
-Intermediate rings of Perbunan Pb72 and/or Pb82,
-Ambient temperatures of -40 °C to +60 °C,
-Operation within the stipulated alignment values.
During the layout of the coupling according to DIN 740 part 2 (or also Product Paper & Tech
Paper” Elastomer Jaw Couplings“) different factors must be considered:
-with higher temperatures a corresponding temperature factor S
-according to the starting frequency a starting factor Sz
-in dependence of the operating conditions an impact factor, SA, SL
With circumferential speeds of more than 22 m/s, we recommend to balance the coupling.
RINGFEDER® TNM E
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7 Assembly
7.1 Pay attention before the assembly
Danger of injuries!
Disconnect the drive before carrying out any work on the coupling!
Secure the drive against unintentional re-start and rotation!
Incorrectly tightened bolts can cause serious personal injuries and
property damages!
In compliance with accident prevention regulations, you are
obliged to protect all freely rotating parts by means of permanently
installed guards/ covers against unintentional contact and falling
down objects.
To avoid sparks, the covers for couplings used in explosive
atmospheres should be made of stainless steel!
As a minimum, the covers have to fulfil the requirements of protec-
tion type IP2X.
The covers have to be designed to prevent dust from depositing on
the coupling.
The cover must not contact the coupling or impair the proper
function of the coupling.
Make sure that the speeds, torques and ambient temperatures as stated in chapter 6
„Technical Data‟ are not exceeded.
The maximum permissible bore diameters must not be exceeded.
Check whether the shaft-hub connections safely transmit the occurring operating torques.
The standard tolerance of RINGFEDER® TNM for finish bores is fit H7.
Standard keyways comply with DIN 6885, sheet 1.
Check the dimensions and tolerances of shafts, hub bores, keys and keyways.
Set screws as required.
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7.2 Finished borehole
For the completion of the finished borehole in a coupling hub, pay attention to following
procedure:
Clean the coupling hub of preservatives.
Tighten the coupling hub to the faces labelled with and carefully align the coupling hub.
The indicated values in table 1 for ød1max and ød2max are valid for a parallel key connection
according to DIN 6885/1 and must not be exceeded.
Choose the borehole fit so that during the union with the shaft tolerance a wringing fit
and/or an interference fit as for example at H7/m6 is carried out.
Provide a setscrew for axial securing on the hub back above the parallel key slot.
In the case of other shaft hub connections consultation with RINGFEDER POWER
TRANSMISSION is necessary.
The maximum indicated borehole diameters are valid for a parallel
key connection according to DIN 6885/1 and must not be exceeded.
In the case of transgression of these values the coupling can
sever.
Through flying away fragments danger exists!
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Fig. 4
Fig. 3
7.3 Installing coupling
Remove the elastic intermediate ring (Figure 3, Pos. 1).
Clean the borehole of the flange hub
and the coupling hub and the shaft
ends before installing. The surfaces
must be clean, dry and grease-free.
Use suitable installation aids and
hoists such as cranes or pulley blocks
in the case of bigger couplings.
Pull the flange hub onto the shaft end
in its intended position (Figure 3,
Pos.2).
Reference:
For easier installation a uniform warming
of the hub to 80 °C to 120 °C is safe.
Warning!
Only work with gloves as a protection against hot parts of the
coupling!
Mount the hub so that the shaft
ends are flush with the interior
borehole opening (Figure 4).
Pay attention to possible differing
agreements!
Secure possible available setscrews
by tightening with an adhesive e.g.
Loctite 222 against automatic loos-
ening and flying out.
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Fig. 5
ATTENTION!
Let the hot hubs cool off to ambient temperature before the introduction of the inter-
mediate ring.
For easier mounting the elastic
intermediate ring can be provided
with a slip additive (e.g. Talcum)
before introduction.
Fit the intermediate ring into one
half of the coupling
Push the shaft ends with the
mounted coupling halves together
(Figure 5).
Adjust the coupling according to the
following specifications in “8 Cou-
pling adjustment”.
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8 Adjusting coupling
Injury hazard!
Switch-off the drive before all work on the coupling!
Secure the drive against unintentional switching on and rotating!
Reference:
An exact alignment of the coupling increases the service life of the
elastic intermediate ring and lessens hazards by use.
Do not exceed the maximum permissible displacement values. The
overstepping of these values results in coupling damage and
breakdown!
When aligning the cold equipment take into account the expected thermal growth of the
components, so that the permissible misalignment values for the coupling are not
exceeded in operation.
Be aware that the coupling under misalignment imposes restoring forces on the adjacent
shafts and bearings. Take into account that the larger the misalignment, the greater the
restoring forces will be.
The displacements values indicated in the tables 2 to 4 are maximum permissible guide
numbers.
We recommend not to fully utilise these values during the alignment, so that in operation
sufficient reserves remain for thermal expansions, foundation settlements etc.
In special cases with high demands on quiet running or high rotating speeds it is possible
that, in the three displacement levels, an alignment accuracy of 0,1 mm is necessary.
If the coupling is mounted in a closed housing / casing so that a subsequent alignment is
not possible any more, it must be guaranteed that the geometry and fit accuracy of the
contact surfaces in operation aligns the shafts exactly within the mentioned tolerances.
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8.1 Angular misalignment Kw
Measure on the face of the external
diameter a complete rotation (360°).
Determine in this case the greatest
deviation Kw1 as well as the small-
est deviation Kw2 (Figure 6).
Calculate the angular misalignment
Kw = Kw1 - Kw2.
The values in table 2 are valid for a
reference rotation speed of
1500 min-1.
Table 2 Maximum permissible displacement values - angular:
Size
82
97
112
128
148
168
194
214
240
265
295
330
370
415
480
575
Kw max [mm]
0,2
0,2
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
8.2 Radial displacement Kr
Measure a complete rotation (360°).
Determine in this case the greatest
deviation Kr1 as well as the small-
est deviation Kr2 (Figure 7).
Calculate the radial displacement
Kr = 0,5 x (Kr1 - Kr2). Pay atten-
tion to the operational sign of the
measured values.
The values of table 3 are valid for a
reference rotation speed of
1500 min-1.
Table 3 Maximum permissible displacement values - radial:
Size
82
97
112
128
148
168
194
214
240
265
295
330
370
415
480
575
Kr max [mm]
0,2
0,2
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
0,3
Fig. 6
Fig. 7
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8.3 Axial displacement
Measure the axial S gap measure-
ment according to figure 8.
Keep, when aligning the gap
measurement S, to the maximum
permissible tolerance X according to
table 4.
ATTENTION!
If greater axial displacements are
expected in operation, consultation
with RINGFEDER POWER
TRANSMISSION is necessary.
Table 4 Recommended alignment values - axial:
Size
82
97
112
128
148
168
194
214
240
265
295
330
370
415
480
575
S [mm]
3
3
3,5
3,5
3,5
3,5
3,5
4
4
5,5
8
8
8
8
8
8
X [mm]
±1
±1
±1
±1
±1
±1,5
±1,5
±2
±2
±2,5
±2,5
±2,5
±2,5
±2,5
±2,5
±2,5
Fig. 8
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9 Operation
When using the coupling attention is to be paid to its characteristics (see „6 Technical data”).
These can in no case be exceeded without having a written agreement from RINGFEDER
POWER TRANSMISSION. In order to guarantee a faultless, lasting operation of the
coupling, it must be laid out accord-ing to the regulations e.g. DIN 740 part 2 (or according
to Product Paper & Tech Paper ”Elastomer Jaw Couplings“) with an operating factor
corresponding to its operating conditions. Every change of the conditions of use or the
operating parameters makes an inspection of the coupling layout urgently necessary.
Injury danger!
Switch-off the drive before all work on the coupling!
Secure the drive against unintentional switch-on and rotating!
Due to incorrectly tightened screws parts can fly away and cause
serious injuries to persons and damage to material!
Check before commissioning the coupling the alignment and all
screw fastenings for their specified tightening torque and/or firm
seating!
Before commissioning the plant install all protective devices
against unintentional touching of free moving and/or rotating parts.
To avoid sparks coverings in stainless steel should be used!
The coverings must fulfil at least the protection type IP2X.
The covering is to be so designed that it does not deposit dust onto
the coupling parts.
The covering must not touch the coupling or influence it in its
functioning.
Pay attention during the operation of the coupling to:
Changed running noises
Occurring vibrations
Attention!
If irregularities are found during operation of the coupling, the drive must be
immediately switched off.
Detect according to the following table 5, “Operating faults and their possible causes” the
faults and remove.
The listed faults are some examples which are supposed to facilitate fault location.
For fault finding and elimination all machine components and operating states are
to be considered!
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Table 5 Operating faults and their possible causes:
Trouble
Cause
Risk Warning
Correction
Irregular
running
noises/
vibrations
Alignment fault
Considerable
increase in
coupling tempera-
ture. Premature
wear of elastic
buffers. Increased
reaction forces act
on connected
machines.
-Disconnect drive
-Remove cause for alignment fault
-Re-align coupling
-Inspect elastomer for wear
Elastomer
worn out
Coupling claws
strike against
each other. Spark
formation, claw
fracture, in-
creased reaction
forces.
-Disconnect drive
-Check coupling components for
damages and replace parts, if nec-
essary
-Replace elastomer
Unbalance
Considerable
increase in
coupling tempera-
ture. Premature
wear of elastic
buffers. Increased
reaction forces act
on connected
machines
-Disconnect drive
-Verify balance state of plant compo-
nents and correct it, if necessary
-Inspect elastomer for wear
Loose
screw
connec-
tions
Flying off parts
can cause serious
injuries and
considerable
damages.
-Disconnect drive
-Check coupling parts for damages,
replace parts, if necessary
-Verify alignment of coupling
-Tighten screws to the specified
tightening torque and secure them
against working loose, if necessary,
-Inspect elastomer for wear
Premature
wear of
elastomer
Alignment fault
Considerable
increase in
coupling tempera-
ture. Increased
reaction forces act
on connected
machines.
-Disconnect drive
-Remove cause for alignment fault
-Re-align coupling
-Inspect elastomer for wear
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Trouble
Cause
Risk Warning
Correction
Unaccept-
able
tempera-
tures
Material proper-
ties of elastic
buffers change.
The torque
transmission
capability is
adversely af-
fected.
-Disconnect drive
-Replace elastomer
-Re-align coupling
-Adjust ambient temperature
Contact
with
aggressive
products
Material proper-
ties of elastic
buffers change.
The torque
transmission
capability is
adversely af-
fected.
-Disconnect drive
-Check coupling parts for damages
and replace parts, if necessary
-Replace elastomer
-Verify alignment of coupling
-Prevent contact with aggressive
products
Torsional
vibrations
in the drive
line
Considerable
increase in
coupling tempera-
ture. Premature
wear of elastic
buffers. Increased
reaction forces act
on connected
machines.
-Disconnect drive
-Analyse and eliminate cause for
torsional vibrations
-Check coupling parts for damages
and replace parts, if necessary
-Replace elastomer and consult
RINGFEDER POWER
TRANSMISSION concerning even-
tual use of another Shore-hardness
-Verify coupling alignment
Claw break-
age
Wear limit
of elas-
tomer
exceeded
===>
contact of
claws
Coupling is
destroyed.
Connected
machines can be
affected, too.
-Disconnect drive
-Replace coupling
-Inspect the elastomer for wear at
shorter intervals
Overload
due to too
high torque
Coupling is
destroyed.
Connected
machines can be
affected, too.
-Disconnect drive
-Verify coupling design in coopera-
tion with RINGFEDER POWER
TRANSMISSION
-Replace coupling
-Install larger coupling, if necessary
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9.1 Sense of rotation test
Injury danger!
Switch-off the drive before all work on the coupling!
Secure the drive against unintentional switching on and rotating!
Due to incorrectly screwed on screws, parts can fly away and
cause person and material damage!
Check before commissioning the coupling the alignment and all
screw fixings for their specified tightening torque and/or firm seat-
ing!
Before commissioning the plant all protective devices against
unintentional touching of free moving and/or rotating parts must be
installed.
To avoid sparks coverings should be made of stainless steel!
The coverings must fulfil at least the protection type IP2X.
The covering is to be designed in such a way that it does not
deposit dust onto the coupling parts.
The covering must not touch the coupling and/or influence it in its
function.
Attention!
A sense of rotation test can only be carried out if the coupling
flange is mounted onto the aggregate drive-side! Otherwise spark-
ing hazards exist through the pushed back claw ring!
Remove the fixing screws on the
claw ring and push it back (Figure 9,
Pos. 1).
Secure the claw ring against uninten-
tional displacement.
Cut through the intermediate ring at a
connecting part (Figure 9, pos. 2).
Pull out the intermediate ring. Start at
the cut through connecting part.
Attention!
Make sure, that the coupling halves can not move axially during the
sense of rotation test.
The coupling half with the pulled back claw ring must remain
stationary during the sense of rotation test.
The rotating half must not touch the stationary half!
Fig. 9
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After the sense of rotation test, cut through a new intermediate ring at a connecting part
and fit it between coupling hub and flange.
To obtain an easier mounting one can provide the new elastic intermediate ring with a slip
additive before its introduction (e.g. talcum powder).
Attention!
The bearing surface of the claw ring and flange hub must be clean, dry and grease-
free. Balanced parts are position marked to each other.
Mount the claw ring into its marked
position. When doing this pay atten-
tion also that the parts not tilt when
being joined to the centering seat.
Slightly tighten the screws uniformly.
Tighten the claw ring threaded joint
with the tightening torque MA stipu-
lated in table 6 (Figure 10).
Check the alignment of the coupling
according to the specifications in „8
Coupling adjustment”.
Table 6 Tightening torques MAof the bolting of the claw ring:
Size
82
97
112
128
148
168
194
214
240
265
295
330
370
415
480
575
DIN 912- 8.8
M6
M6
M8
M8
M10
M10
M10
DIN 912-10.9
M12
M12
M14
M14
M16
M16
M16
M20
M20
MA [Nm]
10
10
25
25
49
49
49
125
125
200
200
310
310
310
610
610
Observe reduced tightening torques for the bolting of the claw ring if coupling parts
are phosphated and oiled!
Size
82
97
112
128
148
168
194
214
240
265
295
330
370
415
480
575
DIN 912- 8.8
M6
M6
M8
M8
M10
M10
M10
DIN 912-10.9
M12
M12
M14
M14
M16
M16
M16
M20
M20
MA [Nm]
8,3
8,3
20
20
40
40
40
100
100
160
160
240
240
240
490
490
Fig. 10
RINGFEDER® TNM E
BAWN 002-GBR-2

-20 -
10 Maintenance
The elastic coupling RINGFEDER® TNM G has in operation a low-maintenance.
Reaching the wear limit of the elastic intermediate ring depends on the operating parameters
and the conditions of use.
In the case of routine monitoring work on the plant check:
Alignment of the coupling
Elastomer state
Remove dust deposits from the coupling parts and the intermediate ring
10.1 Wear Inspection on the Buffer Ring
Danger of injuries!
Disconnect the drive before carrying out any work on the
coupling!
Secure the drive against unintentional switching on and rotating!
Perform a visual inspection and a wear inspection of the buffer ring after
2000 hours, or after 3 months at latest, after the first start-up of the equip-
ment. If only minor wear or no wear is observed, further inspections of the
plant can be carried out at regular intervals of 4000 hours, however, at
least once a year, if the operating modes and conditions of the plant
remain unchanged. However, should you observe excessive wear on the
occasion of this first inspection already, check whether the cause for the
problem is listed in table 5 “Operation faults and possible causes”. In such
a case, the inspection intervals must be adapted to the prevailing service
conditions.
On the occasion of routine inspections or maintenance work on the drive equipment, or after
3 years at latest:
Replace the elastic buffer ring.
If the wear limit has been reached or exceeded, replace the buffer ring immediately,
irrespective of the inspection intervals of the equipment.
Check the alignment of the coupling.
Remove dust deposits from the coupling components and buffer ring.
RINGFEDER® TNM E
BAWN 002-GBR-2