Page 53 - Schmalz - Vacuum Components

2_Kap_VT_EN_2016_VT_KAT 18.02.16 09:36 Seite 53
PA01019111_inh_EN.pdf
Vacuum Knowledge
System Design – Calculation Example
PA01019111_inh_EN.pdf Calculation of Evacuation Times PA01019111_inh_EN.pdf

The entire volume that has to be evacuated is required to Schmalz - The Company
calculate the efficiency of the vacuum system.

V =V + V + V + V + V + …
G 1 2 3 4 5 Vacuum Knowledge
3
V = Volume to be evacuated [m ]
G
3
V = Volume of suction cups [m ]
1
3
V = Volume of mounting elements [m ]
2
3
V = Volume of vacuum hoses [m ] Suction Cups
3
3
V = Volume of distributor [m ] Vacuum
4
3
V = Volume of prefilter (if necessary) [m ]
5
3
V = Volume of solenoid valve (if necessary) [m ]
6
…
Special Grippers
Example:
3
3
3
V = 6 x 35 cm + 6 x 9.5 cm + 6 x 43 cm + 1 x 38.5 cm 3
G
3
V = 564 cm = 0.000564 m 3
G Vacuum Grip- ping Systems
Calculation of evacuation time t [h]
Mounting
t = (V x In (P /P ) x 1.3)/V
G a e Elements
3
V = Volume to be evacuated [m ]
G
In = Natural logarithm
P = Absolute start pressure [1,013 mbar]
a
P = Absolute final pressure [mbar] Vacuum Generators
e
3
V= Suction rate of vacuum generator [m /h]
60% = 400 mbar absolute Technology
Example: Valve
3
t = (0.000564 m x In (1,013 mbar / 400 mbar) x 1.3) / 8.4 m 3
Switches and Monitoring
t = 0.0000811 h = 0.29 s
Test with Original Parts
A complete and energy-efficient vacuum system has been assembled from the Schmalz vacuum components. You should still conduct
tests with original sample workpieces. The theoretical system design gives you a feeling for the size of the system. Schmalz has its Filters and Connections
own test center in which we conduct practical tests.
We will be glad to assist you with our expertise and many years of experience, from planning all the way to commissioning of your
vacuum system. A comprehensive range of trainings and seminars rounds off our program.
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PA01019111_inh_EN.pdf