Considering Earthquake Protection; Tbl. 5: Requirements For The Dimensioning Of Customer-Specific High Vacuum Con - Pfeiffer Vacuum HIPACE 300 Operating Instructions Manual

Parameter
Maximum torque occurring in the event of a burst
Maximum permissible axial load on the high vacuum flange
Flatness
Minimum tensile strength of the flange material in all operating states in rela-
tion to the engagement depth of the fixing screw
Maximum permissible surrounding magnetic field
Maximum permissible irradiated thermal output
Maximum permissible rotor temperature
Tbl. 5:
5.2.2 Considering earthquake protection
Vacuum pump damage caused by external vibrations
In the event of earthquakes or other external vibrations, there is the risk of the rotor coming into con-
tact with the safety bearings, or the housing wall touching the turbopump. This can produce mechani-
cal loads up to and including destruction of the turbopump.
► Make sure that all flange and safety connections absorb the resulting forces.
► Secure the vacuum chamber against displacement or tipping.
6)
7)
Superstructural parts and fittings on the high vacuum connection
Installing superstructural parts and fittings to the high vacuum connection is the responsibil-
ity of the operating company. The loading capacity of the high vacuum flange is specific for
the turbopump used.
● The total weight of superstructural parts must not exceed the maximum axial values
specified.
● Make sure that all the torques generated if the rotor blocks suddenly, are absorbed by
the system on the operator side and the high vacuum connection.
● Only use the approved mounting kits of Pfeiffer Vacuum for the high vacuum connec-
tion of the turbopump.
Requirements for the dimensioning of customer-specific high vacuum connection
The theoretically calculated torque in the event of a burst (rotor shaft breakage) according to ISO 27892 was
not reached in any experimental test.
A one-sided load is not permitted.
6)
7)
NOTICE
Installation
HiPace 300
2000 Nm
500 N
(equivalent to 50 kg)
± 0.05 mm
170 N/mm 2 at 2.5 x d
270 N/mm 2 at 1.5 x d
5.5 mT
2.4 W
90 °C
77/116