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Rubber pads PDF Englisch

WM 945_0 Content:

WM945_1 Foreword
WM945_2 Rubber Information
WM945_3 sheets MEMV vibrate
WM945_4 Impeller MEMV vibrate
WM945_5 110 tons MEMV component vibrate
WM945_6 Vibrating 60 tons MEMV component
WM945_7
WM945_8 In Reply


WM 945 1 Foreword

Metal breaks down with vibration The WIAP MEMV system hides a lot, which makes it safe to vibrate with a more reliable metal. Among other things, it is very important that the rubber squeezing and position of the rubber are considered. In former instructions of the Wiap always had the opinion, it would be better with only 3 editions. But with new measurements it was seen that it is better if four documents do not stress a bending of the components or too high a point load. In addition, since the WIAP in 2014 was able to make many measurements with the measuring rod. It has also been measured that near the rubber, when the highly loaded wring, less excitation enters the component than in zone farther away from the rubber pad position. For this reason, the report is especially about the rubber an important knowledge, which should be studied exactly and better still extended and improved.


WM 945 2 Rubber Information

 

 

MEMV-G-0

Rubber size 0

Rubber with inner grip hole 50 Shore 40x100x200 Kg

MEMV-G-1

Rubber size 1

Rubber with inner handle hole 50 Shore 80x100x200 Kg

MEMV-G-2

Rubber size 2 

Rubber with inner handle hole 50 Shore 120x100x200 Kg

MEMV-G-3

Rubber size 3  

Rubber with inner handle hole 50 Shore 150x200x200 Kg

 

 

Metal relaxation systemWIAP MEMV® Rubber underlay system

 

 

 

 

Single rubber system

 

 

Rubber size

Bruise

Bruise

Bruise

Bruise

Bruise

  H x B x L

60%

H x 0,4

40%

H x 0,6

25%

H x 0,75

10%

H x 0,9

5%

H x 0,95

  80x100x200

  43200N

28800N

18000N

7200N

  3600N

120x100x200

  43200N

28800N

18000N

7200N

  3600N

200x150x200

  64800N

43200N

43200N

10800N

  5400N

 

 

 

 

 

Heavy duty system, single rubber system 3 x 1 small or 2 x 1 large

 

Rubber size

Bruise

Bruise

Bruise

Bruise

Bruise

  H x B x L

60%

40%

25%

10%

5%

80x300x200    3 St.

129600 N

86400 N

54000 N

21600 N

10800 N

120x300x200  3 St.

129600 N

86400 N

54000 N

21600 N

10800 N

200x300x200  2 St.

129600 N

86400 N

54000 N

21600 N

10800 N

 

 

Best vibration damping results when pinching between 5 to 10%

Load as end stop (impact load) - constant (max.): fmax = H × 0,50

 

Load as end stop (impact load) - rarely (max.): fmax = H × 0,60

Constant load - static (max.):
fmax = H × 0,15

Vibration damping:
fmax = H × 0,05 bis 0,10 × H

Data Collection Rubber Information

5% or 60% contusion have, if this has an impact also the G measurement

 

 

 

 

WM 945_3 Sheet MEMV vibrate, single and multiple

 

 

 

Picture 1: Sheet metal plates clamped together 20 pc.

 

 

 

Picture 2: Plates vibrate. Enough rubber pads 100x200x120 10 pcs.

 

 

 

WM 945_ 4  Impeller MEMV vibrate up to 3200 mm diameter

 

 

Picture 3: WIAP® MEMV® relax from duplex impeller. Jim Peter Widmer with the WIAP MEMV E fully automatic controller and printer logs measurement before and after.

 

 

 

Picture 4: The WIAP® MEMV® 6-star support device is set in the positions of the support 1300 mm in diameter. It is thus prevented that the rubber pads can move away during resonant movements. If necessary, that the surgeons prevent a tipping when entering the impeller. The outer diameter of the impeller was 1500 mm; The rubber has been set in radius to 650 mm.

 

 

 

 

 

 

 

 

 

Picture 5: The impeller when placing on the secured rubber pads.

 

 

 

Picture 6: The edition of the secured documents.

 

 

 

Picture 7: Hereby the slipping is ensured, if a self-resonance is run over and at most uses a too long, strong vibration.

 

 

 

WM 945_5 110 tons of MEMV vibrating components

 

 

Picture 8: Jim Widmer fixing the lifting ropes.

 

 

 

Picture 9: Rubber pads for 110 tons: (See more detailed information from the report WM877 60 tons).

 

 

 

Picture 10: Rubber pads 300 x 600 mm 

 

 

 

WM 945 _ 6   60 tons MEMV component vibrate

 

 

Picture 11: Sven Widmer preparing the 60 tons component.

 

 

 

Picture 12: The rubber bruise was big.

 

 

 

Picture 13: Here the 60% of the rubber was reached, more should be avoided.

 

 

 

Picture 14: Here the uneven surface has stressed the rubber too much. Since the component here was made of narrow lower plates, here is a top plate to prevent damaging the rubber.


WM 945_8 Closing words Rubber Information

The fact that the rubber pads are very important for WIAP MEMV vibration has been demonstrated in recent years at the component test. A component is evenly stimulated if there are enough documents under the component. If the single point load is not too large, a better distribution of the longitudinal, transverse and shear waves can take place. A cushioning of individual rubber pad damping should be minimized and if the 15% load capacity is not exceeded, it is a good solution. For that reason, it is better to have more than a few documents for one component. Not saving on obtaining rubber is important. Also the right rubber choice is to be considered. Enough rubber pads. Choose the right hardness. Underground buildings should be treated with care, i. always with the measuring feel see if vibrations are transmitted in secondary zones. If so, increase the rubber height from 80/120 to 200 mm.

Protect rubber from light so it does not harden. Replace rubber if it gets hard. Do not save, otherwise the results will be insufficient for the MEMV process.

Dulliken / Safenwil 9.4.2019
 

Thanks     Greetings     WIAP          sw, jw, iw, hpw

 

 

 

 

WIAP ® AG Ltd SA

Telefon: ++41 62 752 42 60

Telefax­: ++41 62 752 48 61

wiap@widmers.info

www.widmers.info  /  www.wiap.ch

Industriestrasse 48L

CH-4657 Dulliken

        

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