Self-ventilating centrifugal pump

Abstract

In order to specify a centrifugal pump (1) having a centrifugal pump outlet space (6) and a centrifugal pump suction space (4) and also having an additional ventilation pump (3), which is preferably embodied as a vacuum pump, with a ventilation pump inlet (14) and a ventilation pump outlet (15), which centrifugal pump (1) is of particularly simple construction and which, if required, can be automatically ventilated without complex mechanical switching processes, it is proposed that both the ventilation pump inlet (14) and also the ventilation pump outlet (15) are in each case connected by means of a connecting line (16, 17) to the centrifugal pump outlet space (6) so as to form an auxiliary line.

Description

technical field

[0001] The invention relates to a centrifugal pump having a centrifugal pump outlet chamber and an additional exhaust pump, preferably designed as a vacuum pump, which has an exhaust pump intake and an exhaust pump outlet. Background technique

[0002] Various embodiments of such pumps have been known for a long time. In addition, every known pump is supposed to solve the problem that a rotary pump or a centrifugal pump does not self-prime in the start-up operating state.

[0003] For example, patent document DE1960076A1 discloses a centrifugal pump in which an exhaust pump is provided on the back side. In this known centrifugal pump, both the inlet and the outlet of the centrifugal pump are connected to the inlet of the exhaust pump via valves. For venting, the valves of such known centrifugal pumps are connected in such a way that the inlet of the centrifugal pump is connected directly to the inlet of the venting pump. In contrast, during normal operatio...

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