BLADE MACHINE WITH SEALING UNIT, MAINTENANCE METHOD, AS WELL AS APPROPRIATE MAINTENANCE DEVICES Russian patent published in 2018 - IPC F04D13/16 F04D29/10 F04D29/40 F04D3/00 

FIELD: engines and pumps.

SUBSTANCE: pump comprises an outer body portion (1) and an inner body portion (2) in which a shaft (10) carrying a blade wheel (4) is mounted. Between the outer and the inner parts (1, 2) there is a flow channel (3) for the liquid pumped by the wheel (4). The inner body portion (2) is configured to receive a liquid buffer for at least one seal (15) and is provided with holes (19, 20) for feeding and removing the buffer. In the outer body portion (1) recesses (24, 25) are provided through which the openings (19, 20) are available from the outside. In the inner body portion (2) or on it, there is a valve (23), by means of which a line passing through the opening (19) can be blocked. The inventions are aimed to simplify replacement of the liquid buffer and to perform buffer control.

EFFECT: simplifying pump fluid buffer replacement and performing buffer control.

25 cl, 5 dwg