SELF-SANITISATION AGAINST BACTERIA AND FUNGI
TECHNICAL DATA AND GUIDELINES FOR THE CHOICE
Basic data required
- disturbing frequency: the frequency of the disturbing vibration produced by a on-duty machine. In general, it is obtained by the number of rotations of the engine [Hz=r.p.m./60];
- the load applied to every single vibration-damping element [N];
- the isolation degree required [%];
- the deflection value of the vibration-damping element under a given load [mm];
- the rigidity [N/mm], that is to say the load that applied to the vibration-damping element produces a deflection of 1.0 mm.
How to choose the vibration-damping element
- with reference to the diagram for checking the isolation degree, intersect the disturbing frequency value with the isolation degree required (each isolation degree corresponds to a line in the diagram) and define the deflection [in mm];
- divide the load applied onto the vibration-damping element by the deflection value to obtain the required rigidity of the vibration-damping element;
- compare the rigidity obtained with the rigidity shown in the table and choose the vibration-damping element which presents the nearest value (lower) to the calculated one.
- the rigidity values reported in the table refer to the maximum load values.
- the designer must verify that the article chosen through this selection criterion is suitable for the application required, in any case. For this purpose on request for each article, non-linear graphs of the spread (according to the applied load) are available.
Example
Conditions of use:
- disturbing frequency= 50 Hz (3,000 r.p.m.);
- load applied on each vibration-damping element 120 N;
- 90% isolation required;
- diagram shows that with a 50 Hz disturbing frequency and an isolation degree of 90%, the deflection obtained is 1.0 mm;
- divide the load applied by the deflection obtained to define the rigidity required, which is 120/1.0 = 120 N/mm;
- compare the rigidity value obtained (120 N/mm) with the values reported in the table;
- the values reported in table, for type DVA.1, show that the vibration-damping element which should be used is DVA.1-25-20-M6-18-55.
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GENERAL
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ADJUSTABLE LEVERS
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HANDLE WITH PNEUMATIC DRIVE
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GRADUATIONS
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ROTARY CONTROLS
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BALL TRANSFER UNITS
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MODULAR ROLLER TRACKS
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LEVEL BUBBLES
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SPUR GEARS
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RUBBER BUFFERS
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HIGH PERFORMANCE VIBRATION DAMPERS
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MAGNETS
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LEVELLING FEET
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HYGIENIC DESIGN
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HINGES
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PNEUMATIC FASTENING CLAMPS
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ELECTRICAL LEVEL INDICATORS
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CASTORS AND WHEELS
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Vacuum components
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Elastomer springs