MULTI-STAGE CENTRIFUGAL PUMP WITH COMPRESSION BULKHEADS Russian patent published in 2019 - IPC F01D1/02 E21B43/12 

FIELD: engines and pumps.

SUBSTANCE: group of inventions relates to submersible pump systems and, in particular, to submersible multi-stage centrifugal pumping devices. Multistage centrifugal pump comprises housing located upstream and having first end and second end turbomachine stages. They are located inside located upstream housing, and each of these stages comprises diffuser and impeller. There is housing located downstream. It has the first end and the second end, turbomachine stages. These stages are located inside located downstream housing. Each of these stages comprises diffuser and impeller. There is a compression bulkhead. It is connected between the second end of the upstream housing and the first end of the downstream housing. Compression bulkhead can apply compression force to diffusers in upstream housing. Below the multistage pump there is a sealing section for protection of the pump motor against mechanical forces created by the latter, and for lubrication inside the engine with possibility of its expansion and compression at engine operation.

EFFECT: improved submersible centrifugal pumping devices.

20 cl, 4 dwg