RU2677301C1 - Guide device for centrifugal multi-stage pump - Google Patents

Guide device for centrifugal multi-stage pump Download PDF

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Publication number
RU2677301C1
RU2677301C1 RU2018105487A RU2018105487A RU2677301C1 RU 2677301 C1 RU2677301 C1 RU 2677301C1 RU 2018105487 A RU2018105487 A RU 2018105487A RU 2018105487 A RU2018105487 A RU 2018105487A RU 2677301 C1 RU2677301 C1 RU 2677301C1
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RU
Russia
Prior art keywords
guide
radius
vanes
concave
output
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Application number
RU2018105487A
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Russian (ru)
Inventor
Сергей Викторович Яблочко
Original Assignee
Сергей Викторович Яблочко
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Priority to RU2018105487A priority Critical patent/RU2677301C1/en
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Publication of RU2677301C1 publication Critical patent/RU2677301C1/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
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44Fluid-guiding means, e.g. diffusers
    • F04D29/445Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F04D29/448Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers

Abstract

FIELD: pump engineering.SUBSTANCE: invention relates to pump engineering. Guide device of a centrifugal multistage pump contains a disk with guide blades (GB) on one side of the disk and back blades (BB) on the other side of the disk. Each GB is conjugated according to the outer diameter of the disk with the BB with the formation on each side of the disk of guide and reverse channels interconnected. Entrance edges GB are located along the circumference (C) with the formation of the input sections of the guide channels, covering with a gap output sections of the channels formed by the blades of the impeller of the pump. Entrance section of the GB is made at an acute angle to the tangent C, along which the entrance edges of the GB are located. In cross-section, the entrance edge of each GB is formed by an arc of C connected with arcs of C forming the inlet portions of the concave and convex sides of the GB. Middle and output portions of the concave and convex sides of the GB are also formed by arcs of C. Radius of the arcs of C, forming the inlet and middle portions of the convex side, is smaller than the radius of the arcs of C, forming the input and middle portions of the concave side. Radius of the arc of C, which forms the output section of the convex side, exceeds the radius of the arc of C, which forms the output section of the concave side. Output edges of the BB are located along C with the formation of output sections of the return channels. Output section of the BB is made along the radius of C formed by the output sections of the return channels. In the cross section, the output edge of each BB is formed by an arc of C, conjugated with straight lines forming the output portions of the concave and convex sides of the BB. Middle and entrance sections of the concave and convex sides of the BB are formed by arcs of C. Radius of the arc of C, forming the middle portion of the convex side of the BB, greater than the radius of the arcs of C, forming the middle portion of the concave side of the BB. Radius of the arc of C, which forms the entrance section of the convex side of the BB, is smaller than the radius of the arc of C, which forms the input section of the concave side of the BB. Guide device is designed as a single part with eight GB and BB equally spaced around the circumference. Radii passing through the entrance and output edges of each GB form an angle.EFFECT: invention is aimed at reducing the hydraulic resistance in the flow part of the guide device.1 cl, 3 dwg

Description

The invention relates to a pump engineering industry, and in particular to designs of guide vanes of centrifugal pumps.
Known for directing the apparatus of a centrifugal borehole multi-stage pump, containing the upper and lower disks with a through axial hole in each, ribs forming guide channels, an annular housing element and an end liner, a lower disk with ribs, an annular housing element with an upper disk and an end liner made in the form three separate parts, with the end liner adjacent to the lower surface of the upper disk, each rib is continuously moving from the upper to the side and then to the lower part of the lower of its disk, and the guide channels form parabolic lines of fluid flow (see certificate for utility model RU No. 35392, class F04D 29/44, publ. 10.01.2004).
However, this guide vane has a relatively complex design, which narrows the scope of its use.
The closest to the invention in technical essence and the achieved result is a guide vane of a centrifugal multistage pump, comprising a disk with guide vanes made on one side of the disk and reverse vanes made on the other side of the disk, each guide vane being mated at the end of the disk with its corresponding guide vane with the formation on one side of the disk of guide channels and reverse channels on the other side of the disk, interconnected (see patent for the invention RU No. 2220330, class F04D 29/44, publ. 12/27/2003).
This design of the guide vane allows you to reduce vibration, reduce dimensions and simplify the manufacture of the guide vane. However, this design does not allow to reduce the hydraulic resistance to the desired value.
The technical problem solved in this invention is the elimination or reduction of the above disadvantages.
The technical result consists in the fact that it is possible to reduce the hydraulic resistance in the flowing part of the guide apparatus.
The indicated technical problem is solved, and the technical result is achieved due to the fact that the guide apparatus of the centrifugal multistage pump contains a disk with guide vanes made on one side of the disk and reverse vanes made on the other side of the disk, each guide vane is mated along the outer diameter of the disk with its corresponding reverse blade with the formation on one side of the disk of guide channels and reverse channels on the other side of the disk, interconnected, input the holes of the guide vanes are located along the circumference with the formation of the input sections of the guide channels, covering with a gap the output sections of the channels formed by the blades of the impeller of the centrifugal pump, and the input section of the guide vanes is made at an acute angle to the tangent circle along which the input edges of the guide vanes are located, in the transverse the section, the input edge of each guide vanes is formed by an arc of a circle conjugated with circular arcs forming the input sections of the vog the arched and convex sides of the guide vanes, and the middle and output portions of the concave and convex sides of the guide vanes are also formed by circular arcs, the radius of the circular arcs forming the input and middle portions of the convex side of the guide vanes is less than the radius of the circular arcs forming the input and middle portions of the concave side of the guide blades, and the radius of the arc of a circle forming the outlet portion of the convex side of the guide vanes exceeds the radius of the arc of a circle forming the outlet portion of the concave the edges of the return vanes, while the output edges of the return vanes are located along the circle with the formation of the output sections of the return channels, the output section of the return vanes being made along the radius of the circle formed by the output sections of the return channels, in the cross section the output edge of each return blade is formed by an arc of a circle conjugated with straight, forming the output sections of the concave and convex sides of the back vanes, and the middle and inlet sections of the concave and convex sides of the back vanes are called arcs of a circle, the radius of the arc of a circle forming the middle portion of the convex side of the return vanes is greater than the radius of the arcs of the circle forming the middle portion of the concave side of the back vanes, the radius of the arc of the circle forming the input portion of the convex side of the return vanes is smaller than the radius of the arc of the circle forming the input portion of the concave side of the return vanes, the guide apparatus is made in the form of a single part with eight guide rails and return vanes evenly spaced around the circumference, and the radii, etc. going through the inlet and outlet edges of each guide vanes form an angle from 62 ° to 64 °.
In the course of the study, it was found that it is possible to optimize the flow part of the guide apparatus by providing a smoother conversion of the kinetic energy of the flow into potential pressure energy, which is achieved by forming the flow part with less local hydraulic losses, which allows the flow to be directed in the manner described above pumped liquid medium with the required speed and pressure.
In FIG. 1 shows a view of the guide apparatus from the side of the guide vanes.
In FIG. 2 shows a section aa in FIG. one.
In FIG. 3 shows a view of the guide apparatus from the side of the return vanes.
The directing apparatus of a centrifugal multistage pump comprises a disk 1 with guide vanes 2 made on one side of the disk 1 and return vanes 3 made on the other side of the disk 1.
Each guide vane 2 is mated along the outer diameter of the disk 1 with its corresponding return blade 3 with the formation of guide channels 4 and reverse channels 5 on the other side of the disk 1, communicated with each other.
The input edges 6 of the guide vanes 2 are located along the circumference with the formation of the input sections of the guide channels 4, covering with a gap the output sections of the channels formed by the impeller vanes (not shown in the drawing) of the centrifugal pump.
The input portion of the guide vanes 2 is made at an acute angle to the tangent circle along which the input edges 6 of the guide vanes 2 are located. In cross section, the input edge 6 of each guide vanes 2 is formed by an arc of a circle conjugated with circular arcs forming the input portions of the concave and convex sides of the guides blades 2, and the middle and output sections of the concave and convex sides of the guide vanes 2 are also formed by circular arcs.
The radius R1 and R2 of the circular arcs forming, respectively, the input and middle portions of the convex side of the guide vanes 2 is smaller than the radius R3 and R4 of the circular arcs forming, respectively, the input and middle portions of the concave side of the guide vanes 2, and the radius R5 of the circular arc forming the exit the portion of the convex side of the guide vanes 2 exceeds the radius R6 of the arc of a circle forming the outlet portion of the concave side of the guide vanes 2.
The output edges 7 of the return vanes 3 are located along the circle with the formation of the output sections of the return channels 5, and the output section of the return vanes 3 is made along the radius R7 of the circle formed by the output sections of the return channels 5.
In a cross section, the output edge 7 of each return blade 3 is formed by an arc of a circle conjugated with straight lines forming the output sections of the concave and convex sides of the return vanes 3.
The middle and inlet sections of the concave and convex sides of the back vanes are formed by circular arcs. The radius R8 of the arc of a circle forming the middle portion of the convex side of the back vanes 3 is greater than the radius R9 of the arcs of the circle forming the middle portion of the concave side of the back vanes 3.
The radius R10 of the arc of a circle forming the input portion of the convex side of the return vanes 3 is less than the radius R11 of the arc of the circle forming the input portion of the concave side of the return vanes 3.
The guide apparatus is made in the form of a single part with eight guides 2 and return 3 vanes evenly spaced around the circumference, and the radii passing through the input 6 and output 8 edges of each guide vanes 2 form an angle α from 62 ° to 64 °.
During operation of the centrifugal pump, the pumped liquid enters from the impeller into the guide channels 4 formed by the guide vanes 2, and then into the return channels 5 formed by the return vanes 3 of the guide apparatus. In channels 4 and 5 of the guide vane, the kinetic energy of the liquid is partially converted into potential pressure energy, which allows the impeller and the guide vane to work together to create the required head of the centrifugal pump stage and to form a fluid flow from the guide vane and the entrance to the next impeller of the next stage the required pressure and speed and at the optimum swirl angle of the fluid flow, which ultimately allows to increase the efficiency of the centrifugal pump.

Claims (1)

  1. A guide vane of a centrifugal multistage pump, comprising a disk with guide vanes made on one side of the disk and reverse vanes made on the other side of the disk, each guide vane being mated along the outer diameter of the disk with its corresponding return vane with the formation of guide channels and return channels on one side of the disk on the other side of the disk, interconnected, characterized in that the input edges of the guide vanes are located along the circumference with the formation the input sections of the guide channels, covering with a gap the output sections of the channels formed by the blades of the impeller of the centrifugal pump, and the input section of the guide vanes is made at an acute angle to the tangent circle along which the input edges of the guide vanes are located, in the cross section the input edge of each guide vanes is formed by an arc a circle conjugated with circular arcs forming the input portions of the concave and convex sides of the guide vanes, and the middle and output part the kives of the concave and convex sides of the guide vanes are also formed by circular arcs, the radius of the circular arcs forming the input and middle portions of the convex side of the guide vanes is less than the radius of the circular arcs forming the input and middle portions of the concave side of the guide vanes, and the radius of the circular arc forming the exit portion the convex side of the guide vanes exceeds the radius of the arc of a circle forming the outlet portion of the concave side of the guide vanes, while the output edges of the return vanes positioned along the circumference with the formation of the output sections of the return channels, and the output section of the return vanes is made along the radius of the circle formed by the output sections of the return channels, in the cross section the output edge of each return blade is formed by an arc of a circle conjugate with straight lines forming the output sections of the concave and convex sides of the reverse blades, and the middle and inlet sections of the concave and convex sides of the back vanes are formed by circular arcs, the radius of the circular arc forming the middle the portion of the convex side of the return vanes, greater than the radius of the arcs of the circle forming the middle portion of the concave side of the return vanes, the radius of the arc of the circle forming the inlet portion of the convex side of the return vanes, less than the radius of the arc of the circle forming the input portion of the concave side of the return vanes, the guide apparatus is made in the form of a single parts with eight guide vanes and return vanes evenly spaced around the circumference, and radii passing through the inlet and outlet edges of each guide vanes, form an angle from 62 to 64 °.
RU2018105487A 2018-02-14 2018-02-14 Guide device for centrifugal multi-stage pump RU2677301C1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776664A (en) * 1972-08-18 1973-12-04 A Kimmel Small diameter irrigation pump
RU2103560C1 (en) * 1995-12-20 1998-01-27 Научно-производственное объединение энергетического машиностроения им.акад.В.П.Глушко Annular diffuser of centrifugal pump stator
EP1219838B1 (en) * 2000-11-14 2003-10-15 CALPEDA S.p.A. Guide wheel for centrifugal pumps
RU2220330C2 (en) * 2002-03-14 2003-12-27 ОАО "Калужский турбинный завод" Centrifugal pump guide-vane assembly
RU35392U1 (en) * 2003-09-15 2004-01-10 Общество с ограниченной ответственностью "Центр исследований и разработок ЮКОС" The directing device of the centrifugal borehole multistage pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776664A (en) * 1972-08-18 1973-12-04 A Kimmel Small diameter irrigation pump
RU2103560C1 (en) * 1995-12-20 1998-01-27 Научно-производственное объединение энергетического машиностроения им.акад.В.П.Глушко Annular diffuser of centrifugal pump stator
EP1219838B1 (en) * 2000-11-14 2003-10-15 CALPEDA S.p.A. Guide wheel for centrifugal pumps
RU2220330C2 (en) * 2002-03-14 2003-12-27 ОАО "Калужский турбинный завод" Centrifugal pump guide-vane assembly
RU35392U1 (en) * 2003-09-15 2004-01-10 Общество с ограниченной ответственностью "Центр исследований и разработок ЮКОС" The directing device of the centrifugal borehole multistage pump

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