FIELD: pipelines.
SUBSTANCE: group of inventions relates to centrifugal pump unit (2), in particular for house water supply. Unit contains at least one impeller (12) driven by electric motor (4) and return channel (24). Channel (24) connects downstream the pressure side (18) and side (16) of wheel intake (12) and has valve (26) that closes depending on pressure to close this connection along the stream. Unit (2) is equipped with control device (24) for setting the rotational speed of engine (4), which has the function of removing air from unit (2) during operation. Function provides automatic decrease in the engine (4) speed with the help of a control device (28) after detecting the accumulation of air in the first stage, and then in the second stage of rotation, rapid increase therein.
EFFECT: invention is aimed at creating the possibility of removing and preventing air accumulation during the operation of pump unit (2).
14 cl, 9 dwg
| Title | Year | Author | Number |
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RU2567527C2 |
