CN106762808B - High-flow high-lift yellow-leading centrifugal water pump wear-resistant opening ring and preparation method thereof - Google Patents
High-flow high-lift yellow-leading centrifugal water pump wear-resistant opening ring and preparation method thereof Download PDFInfo
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- CN106762808B CN106762808B CN201710177040.7A CN201710177040A CN106762808B CN 106762808 B CN106762808 B CN 106762808B CN 201710177040 A CN201710177040 A CN 201710177040A CN 106762808 B CN106762808 B CN 106762808B
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
- F04D29/2227—Construction and assembly for special materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/10—Metals, alloys or intermetallic compounds
- F05D2300/17—Alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/10—Metals, alloys or intermetallic compounds
- F05D2300/17—Alloys
- F05D2300/171—Steel alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/20—Oxide or non-oxide ceramics
- F05D2300/22—Non-oxide ceramics
- F05D2300/226—Carbides
- F05D2300/2263—Carbides of tungsten, e.g. WC
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a high-flow high-lift yellow-leading centrifugal water pump wear-resistant mouth ring and a preparation method thereof.A raw water pump mouth ring is reformed according to the size of the raw water pump mouth ring, a polyurethane material with excellent abrasion resistance is preferably selected, an embedded steel plate net is used for increasing the integral rigidity and bonding strength of the structure, and a steel-plastic composite polyurethane outer mouth ring is processed; the tungsten carbide inner opening ring of the water pump is manufactured by adopting a hard alloy thick film coating technology. The inner and outer opening rings of the water pump are matched for use, compared with a common carbon steel opening ring, the wear resistance and the service life of the water pump are improved by more than 5 times, a large amount of liquid is effectively prevented from flowing from a high-pressure area to a low-pressure area, the long-term operation of the water pump in a high-efficiency area is guaranteed, the water feeding amount is improved, the power consumption is reduced, and therefore the purposes of saving energy and increasing the efficiency of the water pump are achieved.
Description
Technical Field
The invention relates to the field of high-flow high-lift yellow-leading centrifugal pumps, in particular to a high-flow high-lift yellow-leading centrifugal pump wear-resistant mouth ring and a preparation method thereof.
Background
Although yellow rivers pass through the arid and rainless areas in northwest of China, the water is low and the land is high, and the survival of people and livestock and agricultural production are seriously threatened by water shortage throughout the year. In order to solve the problem of water shortage in grain production, a large number of large and medium irrigation and drainage pump stations are built, water is pumped from the yellow river to carry out farmland irrigation and agricultural water supply, and great contribution is made to the poverty-deprivation and enrichment-causing of the masses in irrigation areas, the agricultural economic development, the improvement of the ecological environment and the promotion of the social development.
The water pump is abraded by the yellow river silt for a long time, so that the abrasion of pump shell, impeller, opening ring and other water pump overflowing parts is serious, and the problems of low operation efficiency, high energy consumption and the like of a pump station generally exist. A large number of practical experiences prove that: the leakage loss between the mouth rings of the high-flow high-lift Cheng Yanghuang water pump is a main factor causing the reduction of the volume rate of the water pump and also a fundamental factor causing the reduction of the efficiency of the water pump. The composition of the silt in the yellow river is harder, the hardness of metal for manufacturing the water pump is far less than that of sand grains, under the premise of higher lift, the abrasion of the silt is accompanied with cavitation erosion, and the cavitation erosion is aggravated, so that the serious abrasion problem is caused, the abrasion of the high-speed sandy water flow to the mouth ring and the mutual friction between the ring and the inlet of the impeller and the pump shell cause the metal surface protective layer to be washed away, and the efficiency of the water pump is seriously reduced. Experimental observations show that: after the newly installed opening ring runs for 4000 to 5000 hours, the average abrasion loss of a single side of the opening edge of the impeller exceeds 2mm, the abrasion depth of the opening ring exceeds 3mm, and even the situation of perforation occurs, so that the water diversion efficiency of the whole pump station system is reduced, and the power consumption is increased; once the water leakage is too large, the water cannot be effectively supplied to the pump station, so that the maintenance cost of the pump station is greatly increased, and the water supply benefit and the social benefit of the pump station are influenced.
Therefore, the abrasion problem of the water pump orifice ring needs to be solved, the water supply quantity of the water pump is improved, the power consumption is reduced, and the aims of saving energy and improving efficiency of the water pump are fulfilled.
Disclosure of Invention
The invention aims to provide a large-flow high-lift yellow-leading centrifugal water pump wear-resistant opening ring and a preparation method thereof, aiming at the defects in the prior art, compared with a common carbon steel opening ring, the wear resistance and the service life of the opening ring can be at least improved by 5 times, a large amount of liquid is effectively prevented from flowing from a high-pressure area to a low-pressure area, the long-term operation of a water pump in a high-efficiency area is ensured, and the purposes of energy conservation and efficiency improvement of the water pump are achieved.
In order to achieve the purpose, the invention discloses the following technical scheme:
the utility model provides a wear-resisting choma of yellow centrifugal pump is drawn to large-traffic high-lift, it has the notch to open in former water pump choma, is equipped with water pump outer choma in the notch, is equipped with rather than complex water pump inner choma in the water pump outer choma:
the water pump outer opening ring comprises a steel plate net and an elastic body, the steel plate net is welded with the raw water pump opening ring and embedded into one side surface of the elastic body, and the surface is contacted with the inner wall of the raw water pump opening ring;
the inner opening ring of the water pump is made of tungsten carbide, and a nickel-based hard alloy layer is coated on the surface of the inner opening ring;
the central lines of the water pump outer opening ring and the water pump inner opening ring are consistent with the central line of the impeller, and the inner surface of the water pump outer opening ring is matched with the outer surface of the water pump inner opening ring.
Further, the water pump outer opening ring is a steel-plastic composite polyurethane water pump outer opening ring.
Further, the elastomer is a high abrasion resistant polyurethane elastomer.
Further, the notch is L-shaped.
Furthermore, a welding groove is formed in one side, close to the impeller, of the notch.
The invention also discloses a preparation method of the high-flow high-lift yellow-leading centrifugal water pump wear-resistant opening ring, which comprises the following steps:
preparing an inner opening ring of the water pump: preparing an inner opening ring coating of a tungsten carbide steel ring at the edge of an impeller opening by adopting a hard alloy thick film coating technology, specifically, selecting a nickel-based hard alloy, adding boron and silicon, coating wear-resistant metal powder on the surface of a workpiece by using thermal spraying equipment to finish the primary forming of the coating, and then heating the coating to 1000-1050 ℃ to form high-strength metallurgical bonding between the coating and a base material so as to ensure that the coating does not fall off under the subsequent mechanical processing and long-term operation use;
preparing an outer opening ring of the water pump: selecting a polyurethane elastic material suitable for hydraulic engineering as a main material of the outer opening ring of the water pump, manufacturing a casting grinding tool and assembling the casting grinding tool on the inner wall of the original water pump opening ring, welding a steel plate mesh on the inner wall of the original water pump opening ring, casting the polyurethane elastic material to complete the installation of the grinding tool, performing high abrasion resistance polyurethane vacuum casting, curing, demolding and repairing to form the steel-plastic composite outer opening ring;
assembling the water pump inner opening ring and the water pump outer opening ring: the cast steel-plastic composite polyurethane wear-resistant outer opening ring is machined into a size suitable for the installation of the outer opening ring of the water pump in a machining mode according to the size and the installation gap of the inner opening ring of the water pump, and then the outer opening ring is installed on a pump station.
Further, when the water pump inner orifice ring is prepared, the coating is heated by adopting low-frequency vortex.
Further, the polyurethane elastic material is a tetrahydrofuran polyether polyurethane elastic material.
The invention discloses a high-flow high-lift yellow-guiding centrifugal water pump wear-resistant mouth ring and a preparation method thereof, and the wear-resistant mouth ring has the following beneficial effects:
(1) The inner opening ring and the outer opening ring of the water pump impeller are respectively processed by adopting a tungsten carbide material with excellent wear resistance and a polyurethane material with excellent cavitation resistance, so that the abrasion resistance of the materials is reasonably utilized, the wear resistance of the water pump opening ring is greatly improved, and the service life of the water pump opening ring is greatly prolonged.
(2) The high abrasion-resistant steel-plastic composite polyurethane outer opening ring is simple in manufacturing process, can be processed according to a water pump opening ring size design mold, is suitable for batch transformation and processing, and is used for recycling the scrapped opening ring.
(3) The tungsten carbide inner orifice ring is prepared by adopting nickel-based hard alloy with excellent wear resistance to prepare a tungsten carbide coating, and the coating and a base material form high-strength metallurgical bonding through low-frequency eddy current heating, so that the tungsten carbide inner orifice ring is suitable for batch production and processing.
(4) The inner and outer opening rings work cooperatively, and are rigid and flexible, so that the abrasion resistance is high, the stable operation of the water pump efficiency in a high-efficiency area for a long time is ensured, and the purposes of energy conservation and efficiency improvement of the water pump are achieved.
Drawings
FIG. 1 is a schematic view of the structure of a water pump impeller according to the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a top view of a tungsten carbide inner orifice ring;
FIG. 5 is a cross-sectional view of a tungsten carbide inner orifice ring;
FIG. 6 is an enlarged view of a portion of FIG. 4;
FIG. 7 is a top view of a steel-plastic composite polyurethane outer orifice ring;
FIG. 8 is a cross-sectional view of a steel-plastic composite polyurethane outer orifice ring;
fig. 9 is a partially enlarged view of fig. 7.
In the figure: 1-a water pump impeller body; 2-water pump impeller edge; 3-raw water pump orifice ring; 4-water pump outer ring; 5-water pump inner orifice ring; a 6-nickel-based hard alloy layer; 7-steel plate net; 8-an elastomer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Compared with the common carbon steel orifice ring, the wear resistance and the service life of the high-flow high-lift yellow-guiding centrifugal water pump wear-resistant orifice ring can be improved by at least 5 times, a large amount of liquid is effectively prevented from flowing from a high-pressure area to a low-pressure area, the long-term operation of the water pump in a high-efficiency area is ensured, and the purposes of saving energy and improving efficiency of the water pump are achieved.
Please refer to fig. 1-9.
The utility model provides a wear-resisting choma of yellow centrifugal pump is drawn to large-traffic high-lift, it has the notch to open in former water pump choma 3, is equipped with water pump outer choma 4 in the notch, is equipped with in the water pump outer choma 4 rather than complex water pump inner choma 5:
the water pump outer opening ring 4 comprises a steel plate net 7 and an elastic body 8, the steel plate net 7 is welded with the raw water pump opening ring 3 and is embedded into the surface of one side of the elastic body 8, and the surface is contacted with the inner wall of the raw water pump opening ring 3;
the water pump inner opening ring 5 is made of tungsten carbide, and a nickel-based hard alloy layer 6 is coated on the surface of the water pump inner opening ring;
the central lines of the water pump outer opening ring 4 and the water pump inner opening ring 5 are consistent with the central line of the impeller, and the inner surface of the water pump outer opening ring 4 is matched with the outer surface of the water pump inner opening ring 5, so that the wear resistance of the water pump opening ring is greatly improved, and the service life of the water pump opening ring is greatly prolonged.
In one embodiment of the invention, the water pump outer opening ring 4 is a steel-plastic composite polyurethane water pump outer opening ring, and the steel-plastic composite structure can increase the structural integrity and strength.
In one embodiment of the present invention, the elastomer 8 is a high abrasion resistant polyurethane elastomer, which is suitable for long-term underwater work, and has high elasticity and strength, and excellent water resistance, wear resistance, oil resistance, fatigue resistance, tear resistance, and shock resistance.
In one embodiment of the invention, the notch is L-shaped.
In one embodiment of the invention, the groove opening is provided with a welding groove at one side close to the impeller, and the tungsten carbide inner opening ring and the impeller are welded and installed.
The invention also discloses a preparation method of the high-flow high-lift yellow-guiding centrifugal water pump wear-resistant mouth ring, which comprises the following steps:
preparing an inner opening ring 5 of the water pump: the method comprises the steps of preparing an inner opening ring coating of a tungsten carbide steel ring at the edge of an impeller opening by adopting a hard alloy thick film coating technology, specifically, selecting a nickel-based hard alloy, adding boron and silicon, coating wear-resistant metal powder on the surface of a workpiece by using thermal spraying equipment to finish the primary forming of the coating, heating the coating to 1000-1050 ℃, so that high-strength metallurgical bonding is formed between the coating and a base material, the coating is ensured not to fall off during subsequent machining and long-term operation, the coating structure after high-temperature treatment has high toughness, a large amount of uniformly-dispersed fine hard particles appear in the internal tissue, the hardness of the coating can reach more than HRC58, and the coating has good wear resistance and cavitation resistance;
preparing a water pump outer opening ring 4: selecting a polyurethane elastic material suitable for hydraulic engineering as a main material of the water pump outer opening ring 4, manufacturing a casting grinding tool and assembling the casting grinding tool on the inner wall of the raw water pump opening ring 3, welding a steel screen 7 on the inner wall of the raw water pump opening ring 3, casting the polyurethane elastic material, completing the installation of the grinding tool, performing high abrasion resistance polyurethane vacuum casting, curing, demoulding and repairing to form the steel-plastic composite outer opening ring;
the water pump inner opening ring 5 and the water pump outer opening ring 4 are assembled: and machining the cast steel-plastic composite polyurethane wear-resistant outer opening ring into a size suitable for installing the outer opening ring 4 of the water pump in a machining mode according to the size and the installation clearance of the inner opening ring of the water pump, and then installing the outer opening ring to the pump station.
In one embodiment of the invention, the water pump inner orifice ring 5 is prepared by heating the coating with a low frequency vortex.
In one embodiment of the invention, the polyurethane elastic material is a tetrahydrofuran polyether type polyurethane elastic material which is very suitable for hydraulic engineering, and material tests show that the material has the advantages of good flexibility, strong water resistance, strong abrasion and cavitation resistance, wide mechanical strength range, good resilience and the like.
The invention is applied to the technical improvement of the antiwear performance of the water pump orifice ring of the northwest Yanghong Huang Bengzhan. For the pumping Huang Shuibeng which has been operated for a period of time (4000-5000 h), the operating efficiency of the water pump is rapidly reduced due to serious erosion of the orifice ring, and the situation that water cannot be pumped is often caused, so that the water supply relation is tense, and the production of an irrigation area and the social stability are not facilitated.
After a large number of tests, the inner mouth ring coating of the tungsten carbide steel ring at the edge of the impeller mouth is prepared by adopting an advanced hard alloy thick film coating technology, the hard alloy based on nickel base is selected, a proper amount of boron, silicon and other elements are added, wear-resistant metal powder is coated on the surface of a workpiece by using thermal spraying equipment to finish the primary forming of the coating, and then the coating is heated to 1000-1050 ℃ by adopting low-frequency eddy current heating, so that high-strength metallurgical bonding is formed between the coating and a base material, and the coating is ensured not to fall off under the subsequent machining and long-term operation. The coating structure after high temperature treatment has high toughness, a large amount of uniformly dispersed fine hard particles appear in the internal structure, and the hardness of the coating can reach more than HRC58, so that the coating has good wear resistance and cavitation resistance.
The tetrahydrofuran polyether type polyurethane elastic material which is very suitable for hydraulic engineering is preferably selected as the main material of the water pump outer orifice ring 4, material tests show that the material has the advantages of good flexibility, strong water resistance, strong wear and cavitation resistance, wide mechanical strength range, good resilience and the like, and in order to increase the rigidity of the polyurethane material and the connection strength with the raw water pump orifice ring 3, a steel plate net is embedded to form the steel-plastic composite outer orifice ring. The manufacturing process comprises the following steps: machining the abraded water pump opening ring → manufacturing and assembling a pouring mold → welding a steel plate net on the opening ring → pouring polyurethane elastic material → installing the mold → vacuum pouring of high abrasion resistant polyurethane → curing → demolding → repairing → the product.
As shown in fig. 2, in combination with the size of the tungsten carbide inner opening ring shown in fig. 4, an annular square groove is formed on the opening edge 2 of the water pump impeller, and a welding groove is formed on one side close to the impeller, and the central line of the annular square groove is kept to be the same as the central line of the water pump impeller. And installing the processed tungsten carbide water pump inner opening ring 5 into the water pump opening edge annular square groove, welding the tungsten carbide water pump inner opening ring with the impeller opening edge through an alternating current welding machine, and then processing the tungsten carbide water pump inner opening ring by adopting a machining mode to meet the requirement of opening ring installation.
As shown in fig. 6, the poured steel-plastic composite polyurethane wear-resistant outer opening ring 4 is machined according to the size of the inner opening ring and the installation gap to a size suitable for installing the outer opening ring of the water pump, and then is installed on a pump station.
Compared with the common carbon steel orifice ring, the wear resistance and the service life of the installed orifice ring can be improved by at least 5 times, a large amount of liquid is effectively prevented from flowing from a high-pressure area to a low-pressure area, the long-term operation of the water pump in a high-efficiency area is ensured, and the purposes of energy conservation and efficiency improvement of the water pump are achieved.
The foregoing is only a preferred embodiment of the present invention and is not limiting thereof; it should be noted that, although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will understand that the technical solutions described in the above embodiments can be modified, and some or all of the technical features can be equivalently replaced; and the modifications and the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a wear-resisting choma of yellow centrifugal pump is drawn to large-traffic high-lift, its characterized in that, it has the notch to open in former water pump choma, is equipped with water pump outer choma in the notch, is equipped with rather than complex water pump inner choma in the water pump outer choma:
the water pump outer opening ring comprises a steel plate net and an elastic body, the steel plate net is welded with the raw water pump opening ring and embedded into one side surface of the elastic body, and the surface is contacted with the inner wall of the raw water pump opening ring;
the inner opening ring of the water pump is made of tungsten carbide, and a nickel-based hard alloy layer is coated on the surface of the inner opening ring;
the central line of mouth ring sum water pump internal orifice ring keeps unanimous with the impeller central line, and mouth ring surface cooperatees in water pump external orifice ring internal surface and the water pump, wherein:
the water pump outer opening ring is a steel-plastic composite polyurethane water pump outer opening ring;
the elastomer is a high abrasion resistant polyurethane elastomer.
2. The high flow, high lift yellow induction centrifugal water pump wear ring of claim 1, wherein said notch is L-shaped.
3. The high-flow high-lift yellow-leading centrifugal water pump wear-resistant orifice ring according to claim 2, wherein the notch is provided with a welding groove on the side close to the impeller.
4. A preparation method of a high-flow high-lift yellow-guiding centrifugal water pump wear-resistant opening ring is characterized by comprising the following steps:
preparing an inner opening ring of the water pump: preparing an inner opening ring coating of a tungsten carbide steel ring at the edge of an impeller opening by adopting a hard alloy thick film coating technology, specifically, selecting a nickel-based hard alloy, adding boron and silicon, coating wear-resistant metal powder on the surface of a workpiece by using thermal spraying equipment to finish the primary forming of the coating, and then heating the coating to 1000-1050 ℃ to form high-strength metallurgical bonding between the coating and a base material, so as to ensure that the coating does not fall off in subsequent machining and long-term operation;
preparing an outer opening ring of the water pump: selecting a polyurethane elastic material suitable for hydraulic engineering as a main material of the outer opening ring of the water pump, manufacturing a casting grinding tool and assembling the casting grinding tool on the inner wall of the original water pump opening ring, welding a steel plate mesh on the inner wall of the original water pump opening ring, casting the polyurethane elastic material to complete the installation of the grinding tool, performing high abrasion resistance polyurethane vacuum casting, curing, demolding and repairing to form the steel-plastic composite outer opening ring;
assembling the water pump inner opening ring and the water pump outer opening ring: and machining the cast steel-plastic composite polyurethane wear-resistant outer opening ring into a size suitable for the installation of the outer opening ring of the water pump in a machining mode according to the size and the installation gap of the inner opening ring of the water pump, and then installing the outer opening ring of the water pump to a pump station.
5. The method for preparing the high-flow high-lift yellow-guiding centrifugal water pump wear-resistant mouth ring according to claim 4, wherein the coating is heated by low-frequency eddy current when the water pump inner mouth ring is prepared.
6. The preparation method of the high-flow high-lift yellow-leading centrifugal water pump wear-resistant opening ring according to claim 4, wherein the polyurethane elastic material is a tetrahydrofuran polyether polyurethane elastic material.
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| CN201710177040.7A CN106762808B (en) | 2017-03-22 | 2017-03-22 | High-flow high-lift yellow-leading centrifugal water pump wear-resistant opening ring and preparation method thereof |
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| CN201710177040.7A CN106762808B (en) | 2017-03-22 | 2017-03-22 | High-flow high-lift yellow-leading centrifugal water pump wear-resistant opening ring and preparation method thereof |
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| CN110185652A (en) * | 2019-06-18 | 2019-08-30 | 泰州市罡阳喷灌机有限公司 | A kind of wear-resisting choma production method of liquid-ring type self priming pump |
| CN111677686A (en) * | 2020-06-03 | 2020-09-18 | 黄河水利委员会黄河水利科学研究院 | Wear-resistant mouth ring of centrifugal water pump and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993006255A1 (en) * | 1991-09-16 | 1993-04-01 | Technogenia | Method for making a composite part with an antiabrasion surface, and parts obtained by such method |
| CN1576574A (en) * | 2003-07-28 | 2005-02-09 | 上海康达化工有限公司 | Anti-abrasion method for hydrotarbine capable of operating under normal atmospheric temperature |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993006255A1 (en) * | 1991-09-16 | 1993-04-01 | Technogenia | Method for making a composite part with an antiabrasion surface, and parts obtained by such method |
| CN1576574A (en) * | 2003-07-28 | 2005-02-09 | 上海康达化工有限公司 | Anti-abrasion method for hydrotarbine capable of operating under normal atmospheric temperature |
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| 温鸿浦 ; 鲍子云 ; .水泵抗磨蚀技术在宁夏扬黄灌区的应用研究.人民黄河.2013,(第06期),101-103. * |
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Inventor after: Chen Bo Inventor after: Wen Hongpu Inventor after: Zhang Yin Inventor after: Li Yandi Inventor after: Yan Li Inventor after: Yu Zhenzhen Inventor after: Guo Weike Inventor after: Deng Yan Inventor after: Zhang Lei Inventor after: Yang Yong Inventor after: Li Guixun Inventor after: Deng Bin Inventor after: Zheng Jun Inventor after: Xi Yingsheng Inventor after: Qiu Yongguang Inventor before: Zhang Lei Inventor before: Guo Weike Inventor before: Yang Yong Inventor before: Li Guixun Inventor before: Zheng Jun Inventor before: Wen Hongpu Inventor before: Zhang Yin Inventor before: Li Yandi Inventor before: Yan Li Inventor before: Yu Zhenzhen |
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Effective date of registration: 20171204 Address after: 848000 the Xinjiang Uygur Autonomous Region Hotan Hotan County Kashi Township cheuck hydropower station during the Applicant after: XINJIANG HUADIAN HETIAN HYDROPOWER CO.,LTD. Applicant after: YELLOW RIVER INSTITUTE OF HYDRAULIC RESEARCH Address before: 450000 Henan province Zhengzhou City Road No. 45 Applicant before: YELLOW RIVER INSTITUTE OF HYDRAULIC RESEARCH |
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