Description
FUNCTION
Centrifugal double-entry pumps of Delium type and electric pump units on their base designed for pumping:
Water and nontoxic liquids having similar properties to water in viscosity and chemical activity, at a density of up to 1100kg/m3, viscosity of up to 60*10-6 m2/s (60сSt), temperature ranging from 274К up to 378К (from +1 up to +105°С), and with solid particles not exceeding 0,2% by weight, with no particles larger than 0,2mm and no particles with microhardness more than 6,5 GPа (650kgf/mm2).
Oil and petroleum products having a viscosity of up to 100*10-6m2/s (100сSt), at a temperature from 274К up to 378К (from +1 up to +105°С), containing not more than 0,2% by weight of solid particles, with no particles larger than 4mm and no particles with microhardness more than 6,5 GPа (650kgf/mm2).
Sea water, strata water and other chemically active liquids with hydrogen index рН=1...11 and with mechanical admixtures up to 0,2% by weight, with a size not more than 0,2 mm and microhardness not exceeding 6,5 GPa (650kgf/mm2), at a temperature ranging from 274К up to 378К (from +1 up to +105°С).
It is possible to fabricate the pumps (units) for handling liquids with a temperature of up to +120°С. Pumps and units are manufactured in climatic version and location category UXL 3.1, U2 and Т2 as per GOST 15150-69. Pumps and units are designed for the regions with seismic activity up to grade 7 for the cast-iron make and up to grade 9 for steel make in conformity with MSK-64 scale.
Pumps and units are made in accordance with general safety requirements as per GOST 31839-2012. The units furnished with pumps having a modification index «Е» and equipped with explosion –proof electric motors may be used in explosion-and-fire hazard productions, area class 1 and 2 as per GOST 30852.9-2002.
DESIGN
Pump of Delium type - is centrifugal double-entry horizontal single-stage machine with double-sided semivolute delivery of liquid to the impeller of double-entry and with volute discharge. It is possible to fabricate the unit of vertical modification.
The principle of operation of the pump consists in transformation of mechanical power of the drive into the hydraulic energy of the liquid due to hydrodynamic influence of the blade system of the impeller, inlet and outlet.
Electric pump unit consists of the pump and driving motor, mounted on common welded foundation frame and interconnected by coupling.
The casing of the pump is an iron casting or steel casting, which has a joint in the horizontal plane passing through the axis of the rotor. The suction and delivery branch pipes of the pump are positioned in lower portion of the casing and are directed in different directions, owing to which it is possible to disassemble and repair the pump without disconnecting pipelines and removing the electric motor. Mounting dimensions of the flanges of the suction and delivery pipelines are made as per GOST 12815-80 (at the Customer's request it is admissible to produce the flange version as per GOST 12815-80).
The rotor of the pump is put in rotation by electric motor through the coupling. The accuracy class of the rotor balancing G 6,3 in conformity with GOST ISO 1940-1-2007.
The radial ball bearings and radial roller bearings, which are lubricated by consistent grease, serve as rotor supports for the horizontal pumps. For the vertical pumps provision is made for the radial-thrust double-row ball bearing which is lubricated by consistent grease and the plain bearing lubricated by pumped liquid.
The sense of rotation of the rotor is right-handed (clockwise), if viewed from the drive end. At the Customer's request it is possible to fabricate the pump with left-handed rotation of the rotor (counterclockwise).
Impeller – is of double-entry type; it allows to place the axial forces in equilibrium. The residual axial forces are taken by ball bearings.
To prevent leakage of liquid along the shaft provision is made in the pump casing for stuffing box seals or single end-face seals. When handling liquids with a temperature of up plus 60°С the water lock of the gland is carried out by supplying liquid to the gland ring through the crossover pipe. Delivery of barrier and cooling liquid to the zone of the gland seal at a temperature of liquid being pumped above 333К (plus 60°С) is effected from the external source.
To transmit the torque from the electric motor shaft to the pump shaft use is made of the couplings with rubber-bushed studs.
At the Customer's request the unit may be completed by semi-rigid plate couplings for the corresponding moments. The coupling are provided with the guard.
The frame of the unit is a welded construction made of rolled iron. The unit on the frame is attached to the foundation with the help of foundation (anchor bolts).
APPLICATION
Oil and gas industries
Nuclear and Thermal power engineering
Water supply and Utilities
Metallurgy industry and mines
Chemical industry
General industry
Agriculture
Pulp and paper industry
Food industry
Sea fleet and inland navigation fleet
Centrifugal double-entry pumps of Delium type and electric pump units on their base designed for pumping:
Water and nontoxic liquids having similar properties to water in viscosity and chemical activity, at a density of up to 1100kg/m3, viscosity of up to 60*10-6 m2/s (60сSt), temperature ranging from 274К up to 378К (from +1 up to +105°С), and with solid particles not exceeding 0,2% by weight, with no particles larger than 0,2mm and no particles with microhardness more than 6,5 GPа (650kgf/mm2).
Oil and petroleum products having a viscosity of up to 100*10-6m2/s (100сSt), at a temperature from 274К up to 378К (from +1 up to +105°С), containing not more than 0,2% by weight of solid particles, with no particles larger than 4mm and no particles with microhardness more than 6,5 GPа (650kgf/mm2).
Sea water, strata water and other chemically active liquids with hydrogen index рН=1...11 and with mechanical admixtures up to 0,2% by weight, with a size not more than 0,2 mm and microhardness not exceeding 6,5 GPa (650kgf/mm2), at a temperature ranging from 274К up to 378К (from +1 up to +105°С).
It is possible to fabricate the pumps (units) for handling liquids with a temperature of up to +120°С. Pumps and units are manufactured in climatic version and location category UXL 3.1, U2 and Т2 as per GOST 15150-69. Pumps and units are designed for the regions with seismic activity up to grade 7 for the cast-iron make and up to grade 9 for steel make in conformity with MSK-64 scale.
Pumps and units are made in accordance with general safety requirements as per GOST 31839-2012. The units furnished with pumps having a modification index «Е» and equipped with explosion –proof electric motors may be used in explosion-and-fire hazard productions, area class 1 and 2 as per GOST 30852.9-2002.
DESIGN
Pump of Delium type - is centrifugal double-entry horizontal single-stage machine with double-sided semivolute delivery of liquid to the impeller of double-entry and with volute discharge. It is possible to fabricate the unit of vertical modification.
The principle of operation of the pump consists in transformation of mechanical power of the drive into the hydraulic energy of the liquid due to hydrodynamic influence of the blade system of the impeller, inlet and outlet.
Electric pump unit consists of the pump and driving motor, mounted on common welded foundation frame and interconnected by coupling.
The casing of the pump is an iron casting or steel casting, which has a joint in the horizontal plane passing through the axis of the rotor. The suction and delivery branch pipes of the pump are positioned in lower portion of the casing and are directed in different directions, owing to which it is possible to disassemble and repair the pump without disconnecting pipelines and removing the electric motor. Mounting dimensions of the flanges of the suction and delivery pipelines are made as per GOST 12815-80 (at the Customer's request it is admissible to produce the flange version as per GOST 12815-80).
The rotor of the pump is put in rotation by electric motor through the coupling. The accuracy class of the rotor balancing G 6,3 in conformity with GOST ISO 1940-1-2007.
The radial ball bearings and radial roller bearings, which are lubricated by consistent grease, serve as rotor supports for the horizontal pumps. For the vertical pumps provision is made for the radial-thrust double-row ball bearing which is lubricated by consistent grease and the plain bearing lubricated by pumped liquid.
The sense of rotation of the rotor is right-handed (clockwise), if viewed from the drive end. At the Customer's request it is possible to fabricate the pump with left-handed rotation of the rotor (counterclockwise).
Impeller – is of double-entry type; it allows to place the axial forces in equilibrium. The residual axial forces are taken by ball bearings.
To prevent leakage of liquid along the shaft provision is made in the pump casing for stuffing box seals or single end-face seals. When handling liquids with a temperature of up plus 60°С the water lock of the gland is carried out by supplying liquid to the gland ring through the crossover pipe. Delivery of barrier and cooling liquid to the zone of the gland seal at a temperature of liquid being pumped above 333К (plus 60°С) is effected from the external source.
To transmit the torque from the electric motor shaft to the pump shaft use is made of the couplings with rubber-bushed studs.
At the Customer's request the unit may be completed by semi-rigid plate couplings for the corresponding moments. The coupling are provided with the guard.
The frame of the unit is a welded construction made of rolled iron. The unit on the frame is attached to the foundation with the help of foundation (anchor bolts).
APPLICATION
Oil and gas industries
Nuclear and Thermal power engineering
Water supply and Utilities
Metallurgy industry and mines
Chemical industry
General industry
Agriculture
Pulp and paper industry
Food industry
Sea fleet and inland navigation fleet