Measurement Report: Bearing for
Weaving Machines (Gera)
Effective structure­borne and airborne
noise reduction with Sylodamp®
Description of the projectTwo production halls in a weaving plant in Gera (Germa­ny) house a total of 112 weaving machines (type: Pican­
ol OMNIplus Summum airjet weaving machines), whichwere causing disruptive vibrations and noise during op­
eration. The vibration insulation for the machine feetprovided by standard cork underlay proved to be inade­quate here. Getzner installed a vibration decoupling withSylodamp® SP 300 under the cork underlay and car­ried out measurements, showing great improvements.

Production hall with weaving machines

Steel plate (15 mm)

Cork underlay

Machine foot with standard cork underlay

Sylodamp® SP 300

Machine foot with additional Sylodamp ® bearing

Comparative measurement process
There are 56 weaving machines in production hall 1
mounted on standard cork underlay. In production hall 2,
there are a further 56 weaving machines of the same
type mounted on Sylodamp® SP 300.
Initial vibration measurements in hall 1 were carried out
on all 56 machines. The weaving machines in hall 2 werenot in operation at the time. An equivalent measurement
was carried out in hall 2. Here, again, the 56 weaving ma­chines were in operation while the machines in hall 1 wereswitched off.
Four triaxial geophones were placed on the floor between
the weaving machines to measure the vibrations. The air­borne noise measurements were carried out in the twobasement rooms located directly below the production
halls. A total of five measurements were carried out indifferent positions in each room.

Benefits— Noticeable reduction in noise— Effective structure­borne noise insulation— Long service life
— Highly effective damping of impact loads

Measurement results for reduction in vibrations
The weighted vibration strength as per DIN 4150­2 wasused to demonstrate the effectiveness of the elastic bear­
ing with Sylodamp®. The triaxial geophones recorded thestrength of the vibrations at the base of the weaving ma­chines in halls 1 and 2 at four different measuring points.

With the use of Sylodamp® in hall 2, it was possible to re­duce the measured vibration strength on the floor by upto 62 %.

KBFmaxHighly noticeable

Graph 1: Improvement of the measured vibration strengths as per DIN 4150-2 at the measuring points (MP)4
3.5

Improvementof 62 % incomparison tocork

32.5

Improvementof 51 % incomparison tocork

2

Improvementof 26 % incomparison tocork

Not noticeable

1.5
10.5

1.38

3.61

1.39

2.81

1.36

1.84

0.85

1.61

Improvementof 47 % incomparison tocork

0Cork
Sylodamp®

MP1

MP2

MP3

MP4

The airborne noise level was also recorded in the base­ment of hall 1 and 2 at four different measuring points.
Underneath production hall 2, where the weaving ma­chines were mounted on Sylodamp®, the airborne noiselevel saw an average reduction of 15 dB(A) in compari­son to the basement room underneath production hall 1,
where the weaving machines were only standing on cork
underlay.

Sound pressure level in dB(A)Graph 2: Improvement of the sound pressure level measured at the measuring points (MP)9080

Improvementof 13 dB in
comparison tocork

7060

Improvementof 13 dB in
comparison tocork

Improvementof 16 dB in
comparison tocork

Improvementof 16 dB incomparison tocork

50
40
30
20
10

80.6
dB(A)

67.5
dB(A)

79.9
dB(A)

66.3
dB(A)

81.2
dB(A)

64.7
dB(A)

81.2
dB(A)

65.3
dB(A)

0Cork
Sylodamp®

MP1

MP2

MP3

Detailed measurement report available on request.

AUSTRIA — Bürs GERMANY — Berlin — Munich — Stuttgart FRANCE — Lyon
JAPAN — Tokyo INDIA — Pune CHINA — Beijing USA — Charlotte

JORDAN — Amman
www.getzner.com

MP4

MR Elastic Bearing for Weaving Machines en © Copyright by Getzner Werkstoffe GmbH | 01­2019
Subject to change without notice.

Measurement results for the reduction of airborne noise