5
Technical Description
Technical Description
52/140 Dual Stage Rotary Vane Pumps User Manual/ 87-900-937-01(L)
due to its design features and low number of gaskets, the pump
requires little maintenance, disassembly and reassemble are easy
and require minimal time.
The pump works with force-feed lubrication, provided by an auxiliary
gear-pump driven by the rotor of the vacuum pump itself. This
ensures proper lubrication even when pressures are close to
atmospheric.
The entire pump functional block is immersed in the oil contained in
the casing. The oil guar3antees perfect sealing of the discharge
valves, enters the pump to ensure lubrication and sealing of the parts
inside, facilitates heat dissipation and reduces pump noise.
The pump is equipped with a special anti-suckback device which
automatically isolates the vacuum system when the pump stops. This
avoids rises in pressure or oil flow in the vacuum system while air is
allowed back into the stator chambers.
The air entering the pump after the anti-suckback device has closed
prevents the oil in the casing from filling the stator chambers.
The inner seals are achieved by the lubricating oil, thanks to the close
machining tolerances.
There is only one oil seal on the rotor shaft, the one preventing oil
from seeping out of the pump. This seal acts on a bushing fitted onto
the shaft. Simple replacement of this seal grants the rotor a
practically unlimited life (pumps DS402 1Ph, DS402 3Ph, DS602 1Ph,
DS602 3Ph). On the DS102 1Ph, DS202 1Ph and DS302 1Ph pumps,
this seal acts on a surface-hardened area of the shaft guaranteeing
long rotor life.
The vacuum pumps are connected directly to the electric motor
through a flexible coupling, so that motion is transmitted even in
case of poor alignment.
A fan fitted on the joint and housed in the pump support produces a
forced air flow over the finned surfaces of the casing to avoid oil
overheating.
To Next Page
Loading...
Need help?
General
