VERTICAL MULTISTAGE CENTRIFUGAL PUMP FOR APPLICATIONS WITH A HIGH CONTENT OF HYDROGEN SULFIDE Russian patent published in 2022 - IPC F04D13/02 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of mechanical engineering, in particular to vertical multistage centrifugal pumps operating in environments with a high content of hydrogen sulfide. A vertical multistage centrifugal pump for use in environments with a high content of hydrogen sulfide contains, mounted on a base plate, an asynchronous explosion-proof AC motor, the shaft of which is connected by means of flanges to the pump shaft through a magnetic coupling located in a separate housing, made with radial stiffeners and coaxially located below it, the discharge housing, in the upper part of which there is a radial-axial bearing, inside which there is an upper radial support of the pump shaft plain bearing and an axial plain bearing and a fitting outlet for air drainage when filling the pump, in the middle there is a discharge pipe, and in The lower part is coaxially fitted with a sleeve hermetically connected by means of sealing rings, in which working stages are installed, made of heat-resistant steel XH35BT, consisting of impellers and guide vanes. The lower part of the sleeve is coaxially mounted, hermetically connected by means of sealing rings, the suction housing in the side wall of which there is a suction pipe and a pipe with a union-nipple connection for draining liquid from the pump during repair, in the lower part of the suction housing there is a lower radial bearing of the pump shaft sliding, the suction housing is connected with a base plate through a flange connection, the suction pipe and the discharge pipe are installed in a horizontal direction, the discharge casing and the suction casing are pulled together with pins through the sleeve, while the body parts and shafts are made of corrosion-resistant steels 10X17H13M2T, 20ЮЧ, astm a350 lf2, the sealing screen is made without welded connections, welds between the sleeve and flanges are reduced, and threaded connections are used in nozzles.

EFFECT: improving the reliability and durability of the device.

1 cl, 3 dwg