RU195473U1 - Vertical centrifugal pump with replaceable flow parts - Google Patents

Vertical centrifugal pump with replaceable flow parts Download PDF

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Publication number
RU195473U1
RU195473U1 RU2019122338U RU2019122338U RU195473U1 RU 195473 U1 RU195473 U1 RU 195473U1 RU 2019122338 U RU2019122338 U RU 2019122338U RU 2019122338 U RU2019122338 U RU 2019122338U RU 195473 U1 RU195473 U1 RU 195473U1
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RU
Russia
Prior art keywords
flow
replaceable
wire
impeller
spiral
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Application number
RU2019122338U
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Russian (ru)
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RU195473U9 (en
Inventor
Владимир Иванович Кушнарев
Иван Владимирович Кушнарев
Юрий Сергеевич Обозный
Original Assignee
Общество с ограниченной ответственностью "Нефтекамский машиностроительный завод" (ООО "НКМЗ")
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Priority to RU2019122338U priority Critical patent/RU195473U9/en
Publication of RU195473U1 publication Critical patent/RU195473U1/en
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Publication of RU195473U9 publication Critical patent/RU195473U9/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/60Mounting; Assembling; Disassembling
    • F04D29/62Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Abstract

The inventive vertical centrifugal pump unit with replaceable flow parts, is characterized by a drive motor, a wire part, a flow part, shafts connecting them, a support housing for mounting the wire part, the flow part being replaceable, and parts of its upper surface correspond to the conjugated lower surfaces of the wire part, moreover, the impeller and spiral bends of the flowing part are made pairwise replaceable, and the parameters of the impeller and spiral bend in each pair of races are read at the maximum value of efficiency while ensuring the required flow and pressure, in addition, removable spiral bends are cast and with a dividing wall that separates the fluid flow in the direction of travel. Effect: increased operational efficiency. 3 ill.

Description

The utility model relates to the field of mechanical engineering, namely to pumping units designed for pumping water, aqueous solutions, as well as oil, oil products and similar liquids through main, technological and auxiliary pipelines.
A known vertical centrifugal pump, comprising a housing with inlet and outlet nozzles, in which there is a withdrawal part comprising a shaft with a serially mounted upstream wheel, impellers, an unloading drum, a double angular contact bearing and a coupling, while the impellers alternate with guide vanes, the drum is located inside the sleeve of the pressure cap, and the angular contact bearing with outer rings is installed in the bearing housing (patent RU 49587, publ. 11.27.2005).
Known vertical pump, double-casing with an impeller of two-way input with the possible installation of the subsequent one (two-stage) or two (three-stage) impellers of one-way inlet with guide vanes. The pump contains an outer casing (cup) with an inlet pipe welded to it. The extraction part of the pump includes a pressure head housing with a welded outlet pipe, a spiral outlet from the impeller of the two-way inlet, pot-type guiding devices for two-stage and three-stage pumps, and impellers located on the shaft. The residual axial forces are perceived by the upper thrust ball bearing on liquid oil lubricant. The lower plain bearing is lubricated by the fluid handled. The shaft end seal is a mechanical end type. [Worthington vertical centrifugal, double suction pumps. Catalog of the company Worthington, - Italy, 1984, - p. 4, 5].
A vertical centrifugal pump is known, comprising an outer casing (cup) with an inlet pipe, a withdrawal part including a pressure casing with an outlet pipe, a pressure cap, a discharge device, one impeller of a two-way entrance (single-stage) or one impeller of a two-way entrance, followed by one (two-stage ) or two (three-stage) single-input impellers with guiding devices, transfer channels, a shaft, the bearings of which are the upper thrust roller bearing and the lower a sliding bearing, a mechanical seal, with preincluded axial wheels placed in front of the impeller of the double-sided input, the exhaust impeller of the double-sided input is made in the form of a guide apparatus and transfer channels, the tap device is located in the pressure housing in the form of a sequentially located guide apparatus and an annular tap of cylindrical or spherical forms (patent RU 106682, publ. 07.20.2011).
Common disadvantages of these pumps is that due to their design solutions, the time and reliability of operation of the pumps in various modes are reduced.
The problem solved by the claimed technical solution is to create a vertical centrifugal pump unit with the highest possible efficiency in modes other than nominal, and an increased service life.
The technical result is an increase in operational efficiency.
The specified technical result is ensured by the fact that in a vertical centrifugal electric pump unit with replaceable flow parts, characterized by a drive motor, a wire part, a flow part, shafts connecting them, a support housing for mounting the wire part, the flow part is replaceable, and parts of its upper surface correspond the conjugate lower surfaces of the wire part, and the impeller and spiral bends of the flow part are made pairwise interchangeable, and the parameters of the working The wheels and the spiral bend in each pair are calculated for the maximum value of efficiency while ensuring the required flow and pressure, in addition, interchangeable spiral bends are made of cast and with a dividing wall that separates the fluid flow in the direction of travel.
A utility model is illustrated in the drawing, where in FIG. 1 shows a General view of the unit in section along the axis of the pipeline in a vertical plane; in FIG. 2 shows a schematic layout of an electric motor, a drive part, a replaceable flow part and a support body in section along the axis of the pipeline in a vertical plane; in FIG. 3 shows possible embodiments of a replaceable flow part with a constant upper connecting profile and various internal hydrodynamic profiles.
The vertical centrifugal pump unit consists of a replaceable flow part 1, a drive motor 2, a wire part of the unit 3, connecting their shafts, a support housing 4 for mounting the drive part of the unit. Moreover, according to the proposed utility model, the flow part 1 is made in the form of a removable assembly, and parts of its upper surface 5 correspond to the shape of the lower surfaces 6 of the wire part 3, and the impeller 7 and the spiral bends 8 of the flow part 1 are made pairwise replaceable, and the working parameters the wheels and spiral bends in each pair are calculated for the maximum value of efficiency, maximum efficiency (efficiency), while ensuring the required flow and pressure. The authors found that it is preferable to make removable spiral bends cast and with a dividing wall 9, dividing the fluid flow in the direction of travel.
Works vertical centrifugal pump unit with replaceable flow parts as follows.
When the shaft of the unit 11 rotates, the pumped medium through the inlet pipe 12 enters the impeller 7, as a result of the interaction of the blades of which with the flow of the pumped medium, the drive energy is converted into flow energy. From the impeller 7, the pumped medium enters the spiral branches 8, where the flow is balanced, and through the outlet pipe 13, the flow enters the pressure pipe.
The wire part 3 provides the transmission of torque from the drive motor 2 to the replaceable flow part 1.
The possibility of using the flow part 1 - pairs realized in the design of the unit: the impeller 7 is a spiral outlet 8, which is designed to work in the optimal mode and this minimizes the radial forces acting on the rotor, which accordingly contributes to the operation of the unit with low vibrations and increases it reliability.
In this case, the transmission of torque from the wire part 3 to the replaceable flow part 1 is carried out by means of hard engagement 14 between the shafts, which also allows the transmission of axial and radial forces arising from the operation of the pump.
To increase the efficiency of using a technical solution, the wire part 3 is designed for a transmission range of torque corresponding to all sizes of electric motors possible for use in this size of the outer casing.
The advantage of the claimed technical solution lies in the possibility of using the same electric motor, a wire part and a supporting body to obtain units with different nominal characteristics that provide maximum efficiency. Therefore, in the event of a change in operating conditions (a decrease in pressure on an existing line, or a change in flow rate through an existing line), it is not necessary or energy-efficient to use a previously mounted pump unit, or to dismantle it and install a new one designed for new operating conditions (pressure, flow). It is enough to install another replaceable flowing part 1, designed for new operating conditions, in an existing support body, with the connection of the existing wire part 2 and an electric motor, and get an aggregate with new nominal design characteristics providing maximum efficiency.
Particularly relevant is the solution to the problem of obtaining a unit with new characteristics on the basis of the old one due to the lack of the need to dismantle the pipeline on which the old unit is installed and operates.
In addition, implemented in the developed solution - the pumping unit, the possibility of replacing the impellers to use them in the optimal mode allows you to extend the life of the entire unit, because impellers are quickly wearing parts, and they can be made of expensive high-strength wear-resistant materials, for example, steel 20X13, 12X18H12M3TL, or similar steels and materials.
Thus, the claimed utility model provides the creation of a vertical centrifugal pump unit with maximum efficiency, having several nominal operating modes with maximum efficiency, while its design is universal, durable, which leads to increased operational efficiency.

Claims (1)

  1. A vertical centrifugal electric pump unit with replaceable flow parts, characterized by a drive motor, a wire part, a flow part, shafts connecting them, a support housing for mounting the wire part, the flow part being replaceable, and parts of its upper surface correspond to the conjugated lower surfaces of the wire part, the impeller and spiral bends of the flow part are made interchangeable in pairs, and I count the parameters of the impeller and spiral bend in each pair camping on the maximum efficiency while ensuring the desired flow and pressure, furthermore replaceable helical bends made and molded with the partition wall separating the liquid flow during the movement.
RU2019122338U 2018-08-17 2018-08-17 Vertical centrifugal pump unit with replaceable flow parts RU195473U9 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2019122338U RU195473U9 (en) 2018-08-17 2018-08-17 Vertical centrifugal pump unit with replaceable flow parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2019122338U RU195473U9 (en) 2018-08-17 2018-08-17 Vertical centrifugal pump unit with replaceable flow parts

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RU195473U1 true RU195473U1 (en) 2020-01-29
RU195473U9 RU195473U9 (en) 2020-03-20

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306220A (en) * 1965-05-03 1967-02-28 Flygts Pumpar Ab Centrifugal pump, particularly a hot water pump
RU106682U1 (en) * 2010-10-05 2011-07-20 Открытое акционерное общество "Научно-исследовательский и проектно-конструкторский институт атомного и энергетического насосостроения" ОАО "ВНИИАЭН" Vertical centrifugal pump
US20110189036A1 (en) * 2010-01-29 2011-08-04 O'Drill/MCM Inc. Modular Vertical Pump Assembly
RU2554670C1 (en) * 2014-05-30 2015-06-27 Открытое акционерное общество "НОВАТЭК" Two-shaft gas-compressor unit for booster compressor stations
RU2616328C1 (en) * 2016-07-13 2017-04-14 Общество с ограниченной ответственностью "Нефтекамский машиностроительный завод" (ООО "НКМЗ") Single-gear centrifugal pumping unit
WO2018014968A1 (en) * 2016-07-22 2018-01-25 Egger Pumps Technology Sa Centrifugal pump body mountable on a tank

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3306220A (en) * 1965-05-03 1967-02-28 Flygts Pumpar Ab Centrifugal pump, particularly a hot water pump
US20110189036A1 (en) * 2010-01-29 2011-08-04 O'Drill/MCM Inc. Modular Vertical Pump Assembly
RU106682U1 (en) * 2010-10-05 2011-07-20 Открытое акционерное общество "Научно-исследовательский и проектно-конструкторский институт атомного и энергетического насосостроения" ОАО "ВНИИАЭН" Vertical centrifugal pump
RU2554670C1 (en) * 2014-05-30 2015-06-27 Открытое акционерное общество "НОВАТЭК" Two-shaft gas-compressor unit for booster compressor stations
RU2616328C1 (en) * 2016-07-13 2017-04-14 Общество с ограниченной ответственностью "Нефтекамский машиностроительный завод" (ООО "НКМЗ") Single-gear centrifugal pumping unit
WO2018014968A1 (en) * 2016-07-22 2018-01-25 Egger Pumps Technology Sa Centrifugal pump body mountable on a tank

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