RU161013U1 - Centrifugal sectional two flow pump - Google Patents

Centrifugal sectional two flow pump Download PDF

Info

Publication number
RU161013U1
RU161013U1 RU2015131222/06U RU2015131222U RU161013U1 RU 161013 U1 RU161013 U1 RU 161013U1 RU 2015131222/06 U RU2015131222/06 U RU 2015131222/06U RU 2015131222 U RU2015131222 U RU 2015131222U RU 161013 U1 RU161013 U1 RU 161013U1
Authority
RU
Russia
Prior art keywords
pump
sections
groups
centrifugal
vanes
Prior art date
Application number
RU2015131222/06U
Other languages
Russian (ru)
Inventor
Сергей Андреевич Тимухин
Алексей Владимирович Долганов
Юрий Петрович Савельев
Алексей Николаевич Пискарёв
Евгений Олегович Чураков
Александр Олегович Ислентьев
Original Assignee
Евгений Олегович Чураков
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Евгений Олегович Чураков filed Critical Евгений Олегович Чураков
Priority to RU2015131222/06U priority Critical patent/RU161013U1/en
Application granted granted Critical
Publication of RU161013U1 publication Critical patent/RU161013U1/en

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06Multi-stage pumps
    • F04D1/063Multi-stage pumps of the vertically split casing type
    • F04D1/066Multi-stage pumps of the vertically split casing type the casing consisting of a plurality of annuli bolted together
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/006Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps double suction pumps

Abstract

1. Centrifugal sectional double-flow pump containing two symmetrically located groups of sections with impellers of one-sided suction, vanes with transfer channels, characterized in that the discharge cavity is located between the end walls of the vanes of the outlet sections of both pump groups, the transfer channels of which are offset relative to each other by half the distance between them, and the discharge pipe is made detachable along its longitudinal axis in the plane of the cross section of the pump, and each of the half of the discharge pipe is made integrally with the bodies of the opposite output sections of both pump groups.

Description

The utility model relates to pump engineering. This pump can be used in mining, oil, metallurgy, chemical and other industries.
Known centrifugal sectional pumps, made according to a single-flow scheme, containing one group of sections with impellers of one-sided suction, vanes with transfer channels and guiding devices [Popov V.M. Mine pumps (theory, calculation and operation). Reference manual. - M .: Nedra, 1993. - 224]. These pumps do not meet modern requirements for shaft centrifugal pumps, both in terms of efficiency and reliability. The hydraulic unloading device used in them to compensate for axial force, consisting of a rotating disk and fixed elements, is a source of significant volume losses (up to 5-6% or more of the nominal pump flow) and has low operational reliability (mean time to failure is on average 110-140 hours). On contaminated water, the running time to failure is reduced to 60-80 hours, which creates big problems in the maintenance of pumps. Throughout the operation of centrifugal sectional single-flow pumps in the mining industry, numerous attempts have been made to improve their discharge devices in order to reduce volumetric losses and increase reliability. However, a fundamental improvement in the operation of the discharge devices was not achieved, and shaft centrifugal sectional pumps, despite some of their obvious advantages compared to other types of pumps, continue to operate with a low level of efficiency. The main reason for this lies in the imperfect hydraulic circuit of a single-flow pump, an integral part of which is the presence of a hydraulic unloading device. In this regard, it is necessary to create fundamentally different schemes of centrifugal sectional pumps in which the axial forces would be compensated in the most efficient way - by symmetrical arrangement of the unilateral suction impellers on the shaft and the use of the two-side impellers.
Closest to the proposed technical solution is a centrifugal sectional dual-flow pump [Patent RU 2081351, IPC F04D 1/06. Centrifugal sectional dual-flow pump. / Filin E.A., Cherkunov A.E., Vaysbrat R.F., Korotkov L.I., Lyagov A.V. Applicant: TUR Joint-Stock Company; Claim 10/9/1991; Publ. 06/10/1997.], Comprising a central section with a double-suction impeller with a spiral outlet and two symmetrically located groups of sections with single-suction impellers, vanes and guide vanes; suction and discharge nozzles. The pump is made in the form of two circuits: an external suction and an internal discharge. The suction circuit is formed by a suction pipe and supply cavities, the discharge circuit is formed by a discharge pipe and a spiral outlet.
Despite the compensation of axial forces provided by the symmetrical arrangement of the impellers in opposite groups of sections, this pump has a complex design and a low level of operational efficiency due to insufficient maintainability and reliability of the design. The central section of this pump is the most complex unit, the manufacture of a double-sided suction wheel is more difficult in comparison with a single-sided suction wheel, and the manufacture of a spiral outlet is an order of magnitude more complicated than a blade.
The purpose of the proposed utility model is to increase the efficiency of the pump through the use of the element base of single-flow centrifugal sectional pumps and simplify the design solution by eliminating the central section with a double-suction impeller with a spiral outlet from the circuit.
This goal is achieved by the fact that in a centrifugal sectional two-flow pump containing two symmetrically located groups of sections with impellers of one-sided suction, vanes with transfer channels and a common discharge cavity with a discharge pipe, the discharge cavity is located between the end walls of the vanes of the outlet sections of both pump groups the transfer channels of which are offset relative to each other by half the distance between them, and the discharge pipe is made connector th of its longitudinal axis in the cross-sectional plane of the pump and each discharge pipe halves integrally formed with the housings opposite the output sections of both groups pump.
In FIG. 1 shows a longitudinal section of a centrifugal sectional dual-flow pump. In FIG. 2 is a cross section of the pump in the plane of the discharge pipe connector.
The pump includes two symmetrically located groups of sections with impellers of unilateral suction 1, vanes 2 and transfer channels 3, identical for both groups, symmetrical suction end caps 4, a common discharge cavity 5 with a discharge pipe 6 having a connector along its longitudinal axis 7 and tie rods 8.
This design solution of the pump allows you to use only unified working sections with one-way suction wheels, vanes and transfer channels, to set a different number of sections in groups to change the pump head with a corresponding change in the length of the shaft and the tie rods, to provide a hydraulically perfect fluid exit from the pump without using a central sections with a double-suction impeller with a spiral outlet, and therefore simplify the design of the pump and increase reliability and efficiency of its technical solutions.
The pump operates as follows: the fluid flows through the suction end caps to the first impellers of both groups of sections pass through the impellers of all sections of these groups and are connected to the discharge cavity in communication with the discharge pipe. With this constructive solution, which excludes the use of a central section with a double-suction impeller with a spiral outlet, an effective drainage of liquid from the pump is carried out, eliminating possible water flows between the last impellers and, therefore, ensuring full compensation of axial force. Due to the corresponding displacement of the translated channels of the blade branches of the output sections relative to each other, pressure energy losses are reduced when fluid flows from the opposite groups of sections are connected, since the counter shock effect of these flows, which is a source of additional energy losses, is eliminated. Due to elimination of the central section from the pump circuit with a double-sided impeller, the proposed technical solution can only use unified sections with single-sided impellers and vanes. All this provides a simplification of the design of the pump and increase the reliability and efficiency of its technical solution.

Claims (1)

1. Centrifugal sectional double-flow pump containing two symmetrically located groups of sections with impellers of one-sided suction, vanes with transfer channels, characterized in that the discharge cavity is located between the end walls of the vanes of the outlet sections of both pump groups, the transfer channels of which are offset relative to each other by half the distance between them, and the discharge pipe is made detachable along its longitudinal axis in the plane of the cross section of the pump, and each of the half of the discharge pipe is made integrally with the bodies of the opposite output sections of both pump groups.
Figure 00000001
RU2015131222/06U 2015-07-27 2015-07-27 Centrifugal sectional two flow pump RU161013U1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2015131222/06U RU161013U1 (en) 2015-07-27 2015-07-27 Centrifugal sectional two flow pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2015131222/06U RU161013U1 (en) 2015-07-27 2015-07-27 Centrifugal sectional two flow pump

Publications (1)

Publication Number Publication Date
RU161013U1 true RU161013U1 (en) 2016-04-10

Family

ID=55659837

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2015131222/06U RU161013U1 (en) 2015-07-27 2015-07-27 Centrifugal sectional two flow pump

Country Status (1)

Country Link
RU (1) RU161013U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU169498U1 (en) * 2016-08-04 2017-03-21 Евгений Олегович Чураков Centrifugal sectional two flow pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU169498U1 (en) * 2016-08-04 2017-03-21 Евгений Олегович Чураков Centrifugal sectional two flow pump

Similar Documents

Publication Publication Date Title
RU2616328C1 (en) Single-gear centrifugal pumping unit
CN203926033U (en) The horizontal multi-stage centrifugal pump of a kind of end water sucting belt inducer
RU161013U1 (en) Centrifugal sectional two flow pump
CN205533288U (en) Double -suction multi -stage centrifugal pump
CN203348177U (en) Horizontal type self-balancing multiple-stage centrifugal pump with high-cavitation-resistant performance
CN104121203A (en) Single-section structure of sectional-type multi-stage pump for sewage
CN204312359U (en) A kind of radial subdivision Double-casing multi-stage centrifugal pump
RU169498U1 (en) Centrifugal sectional two flow pump
RU165532U1 (en) CENTRIFUGAL PUMP TWO-TAP
CN103352876A (en) Horizontal multi-stage centrifugal pump with high cavitation resistance
CN203374532U (en) High-cavitation-resistant-performance horizontal multi-stage centrifugal pump
CN102182690A (en) Composite tubular pump device
CN105782066A (en) Double-suction and multi-stage centrifugal pump
CN106762854A (en) A kind of anti-cavitation double feed inlet double-suction multi-stage pump
CN102720696A (en) Preheating water pump
CN204082677U (en) A kind of single segment structure of multistage sectional centrifugal pump
CN206874490U (en) Axial subdivision three-level centrifugal pump
CN202031843U (en) Deep-well large flow quantity multi-section water lift pump
CN103352875A (en) Horizontal type self-balancing multistage centrifugal pump with high cavitation resistance
CN203879759U (en) Large-flow high-lift multi-stage shield pump
CN202017631U (en) Condensate pump
RU2745095C1 (en) Horizontal multistage sectional centrifugal pump
RU130350U1 (en) Multi-stage centrifugal pump
CN202545342U (en) Multi-stage high-lift single-suction submerged motor pump configured for impeller three-flow structure
RU180155U1 (en) Two-stage horizontal centrifugal pump