Abstract: The invention relates to the field of pump design. A multistage centrifugal pump with two parallel flows of pumped medium comprises a housing consisting of two separate parts, each of which contains impellers and guide apparatus, and a central pressure cover mounted between said parts of the housing. A delivery pipe is vertical and centrally oriented. The pump additionally includes an end transfer cover for transferring fluid from the first part of the housing to the second part via transfer channels provided integrally with the pressure cover and the transfer cover. The impellers are arranged in the first and second parts of the housing such as to be opposed to one another in relation to the central pressure cover. The first part of the housing comprises a horizontal suction pipe and a vertical discharge pipe, which are disposed on the drive side of the pump and are configured in the form of a single cast part.

Abstract: The invention relates to centrifugal pumps and can be used for pumping oil and other fluids along pipelines. A pump comprises a set of strength elements in the form of reinforcing ribs connecting a pump housing to the surfaces of supporting feet of the pump. The fastening surfaces of the feet are situated along the central axis of the inlet and outlet lines. The feet are connected by the reinforcing ribs to the inlet and outlet lines and to bearing assembly housings and connect the housings to one another. The feet themselves are connected to each other in pairs by ribs which pass below the base of the pump housing. The base and the cover of the housing are configured with interior chambers which form an inlet and an outlet. All of the ribs are integral with the cover or the base. The invention is directed toward increasing the reliability and working life of the pump by reducing vibration loads and increasing leak tightness while at the same time minimizing the material requirements of the pump structure.

Abstract: The invention relates to centrifugal pumps and can be used for pumping oil and other fluids along pipelines. A pump comprises a set of strength elements in the form of reinforcing ribs connecting a pump housing to the surfaces of supporting feet of the pump. The fastening surfaces of the feet are situated along the central axis of the inlet and outlet lines. The feet are connected by the reinforcing ribs to the inlet and outlet lines and to bearing assembly housings and connect the housings to one another. The feet themselves are connected to each other in pairs by ribs which pass below the base of the pump housing. The base and the cover of the housing are configured with interior chambers which form an inlet and an outlet. All of the ribs are integral with the cover or the base. The invention is directed toward increasing the reliability and working life of the pump by reducing vibration loads and increasing leak tightness while at the same time minimizing the material requirements of the pump structure.

Abstract: The invention relates to mechanical engineering, namely to pumping installations designed for pumping water, water solutions, as well as oil, oil products and the like through the main, process and auxiliary pipelines, and is directed toward providing a single-stage centrifugal pumping unit which demonstrates peak efficiency in non-nominal modes while having a simplified design and being universal in nature.

Abstract: The mainline electric oil pump assembly relates to the field of assemblies for pumping oil in main oil pipelines. The aim of the present invention is to create a mainline electric oil pump assembly with improved technical and economic characteristics, reduced noise and vibrations, and increased reliability, service life and performance. The main distinguishing features of the proposed assembly which contribute to the achievement of the aforementioned aim are: the non-splined, zero-backlash seating of the impeller on a smooth shaft, the use of roller bearings seated in a non-splined, zero-backlash fashion on the smooth shaft, the use of mechanical seals seated in a non-splined, zero-backlash fashion on the smooth shaft, the use of self-correcting adjustable spherical supports under the supporting feet of the pump, and the boring of the seating surfaces of the pump housing for the rotor in a single set-up operation.

Abstract: The mainline electric oil pump assembly relates to the field of assemblies for pumping oil in main oil pipelines. The aim of the present invention is to create a mainline electric oil pump assembly with improved technical and economic characteristics, reduced noise and vibrations, and increased reliability, service life and performance. The main distinguishing features of the proposed assembly which contribute to the achievement of the aforementioned aim are: the non-splined, zero-backlash seating of the impeller on a smooth shaft, the use of roller bearings seated in a non-splined, zero-backlash fashion on the smooth shaft, the use of mechanical seals seated in a non-splined, zero-backlash fashion on the smooth shaft, the use of self-correcting adjustable spherical supports under the supporting feet of the pump, and the boring of the seating surfaces of the pump housing for the rotor in a single set-up operation.