CN112761962B - Spiral impeller with crushing function and centrifugal pump with same - Google Patents

Spiral impeller with crushing function and centrifugal pump with same Download PDF

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Publication number
CN112761962B
CN112761962B CN202011636312.3A CN202011636312A CN112761962B CN 112761962 B CN112761962 B CN 112761962B CN 202011636312 A CN202011636312 A CN 202011636312A CN 112761962 B CN112761962 B CN 112761962B
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China
Prior art keywords
blade
edge
hub
outer edge
impeller
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CN202011636312.3A
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CN112761962A (en
Inventor
柴立平
葛帝宏
滕海龙
徐金华
邓业稳
赵德
杨孟
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Hefei Huasheng Pumps & Valves Co ltd
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Hefei Huasheng Pumps & Valves Co ltd
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Priority to CN202011636312.3A priority Critical patent/CN112761962B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape

Abstract

A spiral impeller with a crushing function comprises a hub and blades arranged on the hub; the blade is provided with a notch, the notch is intersected with the outer edge of the blade, and the outer edge is the edge of the blade positioned on the concentric ring of the hub. The impeller is characterized in that the impeller blade is provided with a notch matched with the protrusion, so that when the notch passes through the protrusion, the protrusion is matched with the blade to extrude and crush large solid particles in passing fluid. And the crushing effect on the solid particles in the fluid depends on the clearance between the protrusion and the blade.

Description

Spiral impeller with crushing function and centrifugal pump with same
Technical Field
The invention relates to the field of impellers and centrifugal pumps, in particular to a spiral impeller with a crushing function and a centrifugal pump with the same.
Background
Impellers are common components in axial flow pumps. The impeller has a function of conveying the fluid in the flow passage. Some fluids contain large solid particles, a crushing wheel is needed for crushing, and impellers in the existing equipment do not have the crushing function, are easily blocked by the large solid particles and cannot work.
Disclosure of Invention
In order to solve the defect that the conventional impeller is easily blocked by large solid particles in fluid, the invention provides a spiral impeller with a crushing function and a centrifugal pump with the same.
One of the purposes of the invention adopts the following technical scheme:
a screw impeller with crushing function comprises a hub shaft and blades arranged on the hub; the blade is provided with a notch, the notch is intersected with the outer edge of the blade, and the outer edge is the edge of the blade positioned on the concentric ring of the hub.
Preferably, the blade includes a first blade portion and a second blade portion connected in the axial direction of the hub; the outer edges of all the first blade parts are positioned on a first circular ring surface of which the center line is collinear with the axis of the hub, and the outer edges of the first blade parts are the outer edges of the blades; the outer edge of the second blade part is positioned on the inner periphery of the first circular ring surface; the gap is formed in the area between the outer edge of the vane and the outer edge of the second vane part.
Preferably, the transition edge connecting between the outer edge of the first blade portion and the outer edge of the second blade portion is located in the radial direction of the hub.
Preferably, the outer edge of the second blade portion lies on a second torus having a centreline collinear with the hub axis.
Preferably, the outer edge of the second blade portion is located on a circumferential surface of a circular truncated cone whose center line is collinear with the hub axis.
Preferably, the edge of the blade connected with the hub is taken as the inner edge, and the edge of the blade connected between the outer edge and the inner edge is taken as the side edge; the end of the outer edge of the second blade part, which is far away from the first blade part, is connected with the end of the side edge, which is far away from the hub.
The second purpose of the invention adopts the following technical scheme:
a centrifugal pump comprises the spiral impeller with the crushing function, wherein the inner wall of a flow channel where the impeller is located is provided with a bulge matched with the notch.
Preferably, the outer edge of the second blade part of the impeller is located on the circumferential surface of a circular truncated cone of which the center line is collinear with the axis of the hub, and the flow direction of the fluid in the flow passage is the same as the direction from the large end to the small end of the circumferential surface of the circular truncated cone; the edge of the blade connected with the hub is taken as the inner edge, and the edge of the blade connected between the outer edge and the inner edge is taken as the side edge; the end of the outer edge of the second blade part, which is far away from the first blade part, is connected with the end of the side edge, which is far away from the hub.
Preferably, the number of the bulges is equal to that of the blades of the impeller and corresponds to that of the blades of the impeller one by one; the impeller has a first state and a second state in the rotation process; in the first state, the projection is offset from the blade; in the second state, the protrusions correspond to the blades one to one, and each protrusion is inserted into the notch of the corresponding blade.
Preferably, the front end of the impeller is coaxially provided with a pre-crushing wheel.
The invention has the advantages that:
(1) The impeller is characterized in that the impeller blade is provided with a notch matched with the protrusion, so that when the notch passes through the protrusion, the protrusion is matched with the blade to extrude and crush large solid particles in passing fluid. And, the crushing effect on the solid particles in the fluid depends on the gap between the protrusion and the vane.
(2) Through the cooperation of the impeller and the bulges, the impeller guides the fluid to the openings, so that the centralized crushing is realized, and the efficiency of crushing the fluid by the cooperation of the bulges and the blades is improved.
(3) Connect the transition edge between the outer fringe of first blade portion and the outer fringe of second blade portion and be located wheel hub's radial direction, made things convenient for protruding cooperation with the opening, guaranteed the rotatory in-process of impeller, protruding through opening and blade smooth transition, avoid impeller and protruding friction card to pause.
(4) The contained angle that the outer fringe of transition reason and second vane portion formed is the right angle, so, through protruding with the cooperation of contained angle can improve the grinding efficiency to the fluid.
(5) The flow channel between the front side of the bulge and the blade is larger than the flow channel between the rear side of the bulge and the blade, so that when fluid flows, in the process of flowing from the front side of the bulge to the rear side, the particle size of solid particles in the fluid is reduced due to crushing, the crushing effect of the solid particles in the fluid is ensured, and the phenomenon that the impeller at the rear is blocked by large-particle fluid is avoided.
Drawings
FIG. 1 is a side view of an impeller;
FIG. 2 is a schematic view of a single blade of FIG. 1;
FIG. 3 is a schematic view of a single lobe mating with a single projection;
FIG. 4 is a side view of the stator;
fig. 5 is a side view of the crushing wheel in a second state;
FIG. 6 is a schematic view of another bucket;
FIG. 7 is a schematic view of another bucket;
FIG. 8 is a schematic view of another bucket;
FIG. 9 is a sectional view of a centrifugal pump;
fig. 10 is a partially enlarged view of fig. 9.
The figure is as follows:
impeller: a hub 11, blades 12, a slit 120, a first blade section 121, and a second blade section 122;
a stator: a fixing ring 21, a protrusion 22; a pre-crushing wheel 3.
Detailed Description
In this embodiment, a crushing wheel is proposed, which can also be designated as a helical guide structure.
The breaker wheel includes an impeller and a stator. Specifically, the impeller is provided with the notch 120 on the blade 12, and the stator is provided with the protrusion 22 matched with the notch 120, so that the fluid can be guided in the rotating process of the impeller, and the protrusion 22 and the notch 120 are intermittently matched, so that the crushing and grinding effect on solid particles in the fluid is realized.
Impeller
The screw impeller with the crushing function provided by the embodiment comprises a hub 11 and blades 12 arranged on the hub 11. The blade 12 is provided with a notch 120, the notch 120 is intersected with the outer edge of the blade 12, and the outer edge is the edge of the blade 12 located on the concentric ring of the hub 11. That is, in the present embodiment, the notch 120 is formed by cutting from the outer edge of the blade 12, or is formed by recessing a section of the outer edge of the blade 12.
Specifically, the blade 12 includes a first blade portion 121 and a second blade portion 122 connected along the axial direction of the hub 11; the outer edges of all the first blade parts 121 are located on a first circular ring surface of which the center line is collinear with the axis of the hub 11, and the outer edges of the first blade parts 121 are the outer edges of the blades 12; the outer edge of the second blade portion 122 is located on the inner periphery of the first circular ring surface. The area between the outer edge of the vane 12 and the outer edge of the second vane part 122 forms the gap 120.
In the present embodiment, a transition edge connecting the outer edges of the first blade portions 121 and the second blade portions 122 is located in the radial direction of the hub 11. That is, it can be seen that the blade 12 is cut through a plane perpendicular to the axis of the hub 11, forming a transition edge connecting between the outer edge of the first blade portion 121 and the outer edge of the second blade portion 122. Therefore, the matching of the bulge 22 and the notch 120 is facilitated, the bulge 22 and the blade 12 are in smooth transition through the notch 120 in the rotating process of the impeller, and the impeller is prevented from being clamped by friction with the bulge 22.
In a specific implementation, the blade 12 may be divided into a first blade portion 121 and a second blade portion 122; alternatively, the blade 12 is divided into the first blade portion 121 and the second blade portion 122 which are alternately distributed; the specific setting can be carried out according to the needs.
In one embodiment, the outer edge of the second blade portion 122 may be located on a second torus having a centerline collinear with the axis of the hub 11. That is, the included angle formed by the transition edge and the outer edge of the second vane portion 122 is a right angle, so that the protrusion 22 and the included angle are matched to improve the grinding efficiency of the particles in the fluid.
In the present embodiment, the outer edge of the second blade portion 122 is located on the circumferential surface of the circular truncated cone whose center line is collinear with the axis of the hub 11. The edge of the blade 12 connected with the hub 11 is taken as the inner edge, and the edge of the blade 12 connected between the outer edge and the inner edge is taken as the side edge; the end of the outer edge of the second blade part 122 remote from the first blade part 121 is connected to the end of the side edge remote from the hub 11. At this time, the large end radius of the circumferential surface of the circular truncated cone where the outer edge of the second vane portion 122 is located is equal to the radius of the first circular ring surface, the small end radius of the circumferential surface of the circular truncated cone where the outer edge of the second vane portion 122 is located is smaller than the large end radius thereof, and an included angle formed by the transition edge and the outer edge of the second vane portion 122 is an acute angle. In the rotation process of the impeller, when the large end of the circumferential surface of the circular truncated cone faces the direction of the fluid source, the impeller can guide the fluid to an included angle formed by the transition edge and the outer edge of the second blade part 122, so that when the notch 120 passes through the protrusion 22, the protrusion 22 cooperates with the blade 12 to crush the fluid.
Stator
The stator in the present embodiment includes a ring-shaped stationary ring 21 and a projection 22 provided on the inner periphery of the stationary ring 21; the bulge 22 is matched with a notch 120 on the blade 12 of the impeller coaxially arranged on the inner periphery of the fixed ring 21; wherein, the notch 120 is arranged on each blade 12 of the impeller. That is, the impeller has a rotational symmetry structure with the axis of the hub 11 as a symmetry axis, and during the rotation of the impeller, the notches 120 on the blades 12 sequentially pass through the protrusions 22, so as to crush the fluid passing through the notches 120.
In the present embodiment, in the fluid flowing direction, the front side of the protrusion 22 is a smooth transition structure; that is, the front side of the projection 22 is the side facing the fluid source. In this way, the fluid is prevented from being caught by the protrusions 22, thereby securing the reliability of the rotation of the impeller. Meanwhile, in the embodiment, the gap between the front side of the protrusion 22 and the blade 12 is larger than the gap between the rear side of the protrusion 22 and the blade 12, so that when fluid flows, in the process of flowing from the front side to the rear side of the protrusion 22, the particle size in the fluid is reduced due to crushing, thereby ensuring the effect of crushing large solid particles in the fluid and avoiding the condition that an impeller flow channel is blocked by large particle fluid.
Helical guide structures, i.e. crushing wheels
In the spiral guide structure provided in the present embodiment, namely the crushing wheel, the number of the protrusions 22 on the stator is equal to the number of the blades 12 on the impeller; and the impeller has two states in the rotation process, in the first state, the bulge 22 is deviated from the blade 12; in the second state, the protrusions 22 correspond to the blades 12 one by one, and each protrusion 22 is inserted into the corresponding notch 120 of the blade 12. If the number of the blades 12 on the impeller is n, the second state can be realized for n times in the period of one rotation of the impeller, and the crushing efficiency of solid particles in the fluid is ensured.
In the embodiment, a centrifugal pump is also provided.
The centrifugal pump comprises the crushing wheel.
Specifically, in the centrifugal pump, the fixing ring 21 and the pump body of the centrifugal pump are integrally formed, which is equivalent to that the centrifugal pump forms the stator on the inner wall of the flow passage where the impeller is located.
The outer edge of the second blade portion 122 of the impeller is located on the circumferential surface of a circular truncated cone whose center line is collinear with the axis of the hub 11, and the flow direction of the fluid in the flow passage is the same as the direction from the large end to the small end of the circumferential surface of the circular truncated cone. Namely, the front side of the stator faces the large end of the circumferential surface of the circular truncated cone, and the fluid crushing effect of the crushing wheel and the fluid guide effect of the impeller are ensured.
In this embodiment, on the flow channel where the impeller is located, a pre-crushing wheel 3 is coaxially arranged at the front end of the impeller and the impeller, so that the fluid is pre-crushed by the pre-crushing wheel 3.
The present invention is not limited to the above embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A centrifugal pump, characterized by comprising a screw impeller having a crushing function, the screw impeller comprising a hub (11) and blades (12) provided on the hub (11); the blade (12) is provided with a notch (120), the notch (120) is intersected with the outer edge of the blade (12), and the outer edge is the edge of the blade (12) positioned on the concentric ring of the hub (11); the inner wall of a flow channel where the spiral impeller is located in the centrifugal pump is provided with a bulge (22) matched with the notch (120); when the opening passes through the bulge, the bulge is matched with the blade to extrude and crush solid particles in passing fluid;
the number of the bulges (22) is equal to that of the blades of the spiral impeller and corresponds to that of the blades of the spiral impeller one by one; the spiral impeller has a first state and a second state in the rotating process; in a first state, the projection (22) is offset from the blade (12); in the second state, the bulges (22) correspond to the blades (12) one by one, and each bulge (22) is inserted into the notch (120) of the corresponding blade (12);
the blade (12) comprises a first blade part (121) and a second blade part (122) which are axially connected along the hub (11); the outer edges of all the first blade parts (121) are positioned on a first circular ring surface of which the center line is collinear with the axis of the hub (11), and the outer edges of the first blade parts (121) are the outer edges of the blades (12); the outer edge of the second blade part (122) is positioned on the inner periphery of the first circular ring surface; the gap (120) is formed in the area between the outer edge of the blade (12) and the outer edge of the second blade part (122);
the edge of the blade (12) connected with the hub (11) is taken as the inner edge, and the edge of the blade (12) connected between the outer edge and the inner edge is taken as the side edge; the end of the outer edge of the second blade part (122) far away from the first blade part (121) is connected with the end of the side edge far away from the hub (11).
2. The centrifugal pump according to claim 1, wherein the outer edge of the second vane portion (122) of the helical impeller is located on the circumferential surface of a truncated cone whose center line is collinear with the axis of the hub (11), and the direction of fluid flow in the flow passage is the same as the direction from the large end to the small end of the circumferential surface of the truncated cone; the edge of the blade (12) connected with the hub (11) is taken as the inner edge, and the edge of the blade (12) connected between the outer edge and the inner edge is taken as the side edge; the end of the outer edge of the second blade part (122) far away from the first blade part (121) is connected with the end of the side edge far away from the hub (11).
3. Centrifugal pump according to claim 1, characterized in that the front end of the helical impeller is provided coaxially with a precrushing wheel (3).
4. A centrifugal pump according to claim 1, wherein the transition edge connecting between the outer edge of the first vane portion (121) and the outer edge of the second vane portion (122) is located in the radial direction of the hub (11).
5. The centrifugal pump of claim 4, wherein the outer edge of the second vane portion (122) lies on a second torus having a centerline collinear with the axis of the hub (11).
6. The centrifugal pump according to claim 4, wherein the outer edge of the second vane portion (122) is located on the circumferential surface of a truncated cone whose center line is collinear with the axis of the hub (11).
CN202011636312.3A 2020-12-31 2020-12-31 Spiral impeller with crushing function and centrifugal pump with same Active CN112761962B (en)

Priority Applications (1)

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CN202011636312.3A CN112761962B (en) 2020-12-31 2020-12-31 Spiral impeller with crushing function and centrifugal pump with same

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Application Number Priority Date Filing Date Title
CN202011636312.3A CN112761962B (en) 2020-12-31 2020-12-31 Spiral impeller with crushing function and centrifugal pump with same

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CN112761962B true CN112761962B (en) 2022-12-20

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10012181C2 (en) * 2000-03-13 2002-05-16 Ritz Pumpenfabrik Gmbh & Co Kg Centrifugal pump with knobbed impeller and knobbed impeller therefor
CN206111657U (en) * 2016-10-21 2017-04-19 谢海华 Cutting assembly mounting structure and pumps filth cutting assembly thereof
CN206234126U (en) * 2016-11-17 2017-06-09 江苏国泉泵业制造有限公司 A kind of band grinds the dual channel dredge pump of cutterhead
CN106762706B (en) * 2017-03-08 2023-02-14 佛山市肯富来工业泵有限公司 Anti-blocking submersible sewage pump
CN208396961U (en) * 2018-07-07 2019-01-18 普仑斯(福建)泵业有限公司 Sewage pump is smashed in anti-sticking cutting to pieces
CN209444570U (en) * 2019-01-17 2019-09-27 广州市望高泵业有限公司 A kind of dredge pump with shredding mechanism
CN211737539U (en) * 2020-02-24 2020-10-23 希阿埃（广州）有限公司 Cutting impeller structure of submersible pump

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