CN109209856A - A kind of pump cover and its manufacturing method - Google Patents
A kind of pump cover and its manufacturing method Download PDFInfo
- Publication number
- CN109209856A CN109209856A CN201811220459.7A CN201811220459A CN109209856A CN 109209856 A CN109209856 A CN 109209856A CN 201811220459 A CN201811220459 A CN 201811220459A CN 109209856 A CN109209856 A CN 109209856A
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- China
- Prior art keywords
- groove
- pump cover
- metallic
- layer
- inner liner
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/42—Casting under special conditions, e.g. vacuum
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to pump technical fields, disclose the pump cover and its manufacturing method of a kind of pump, pump cover includes metal framework structure layer and non-metallic inner liner layer, the side contacted on metal framework structure layer with non-metallic inner liner layer is equipped with groove, transition structure is additionally provided at outer edge, non-metallic inner liner layer is fully populated in groove by heating melting, the method for moulding by casting and applied solid is in metal additional structure layers.Pass through groove, the setting of transition structure, greatly improve the tensile strength between nonmetallic materials liner layer and pump cover metallic framework, and the defects of ensuring blanking smooth and abundant exhaust when liner layer material is poured, avoiding the peeling, delamination, cracking, stomata of liner layer material.
Description
Technical field
The present invention relates to pump technical fields, and in particular to a kind of pump cover and its manufacturing method.
Background technique
Pump cover currently on the market divides two major classes from material, and one kind is metal casting part, and another kind of is nonmetallic materials
With pump cover metallic framework composite members, the pump cover metal framework structure in nonmetallic materials liner composite members is designed currently on the market,
It only needs to do nonmetallic materials lining parts surface size for pump cover simply to reduce, then passes through nonmetallic materials liner again
To fill the size for reducing part.And these common pump cover metal framework structure design tensions when doing nonmetallic materials liner
Intensity is inadequate, client in use, product be easy to cause non-metallic inner liner layer to fall off, crack and edge delamination leakage, so as to shorten
The service life of the product；Non-metallic inner liner material is inadequate with pump cover metallic framework tensile strength, producer when producing the part,
Nonmetallic materials inner lining surface cracking can often occur and part delamination is led to need secondary operation to handle abnormal quality
It causes manufacturing cost to rise to extend with the production cycle, to reduce the competitiveness of product in market.
Chinese invention patent (CN106050724, desulfurization pump of a kind of lining resin silicon carbide and preparation method thereof) is open
A kind of desulfurization pump, front pump cover and rear pump cover inner wall are equipped with liner, and inner lining material is resin carbonation silicon material, heating casting
It is molded on pump cover inner wall, improves the integral strength and stability of pump.But this setting non-metallic inner liner on pump cover
Method is one layer of carbofrax material of hot pouring on smooth pump cover inner wall, although bonding in inner lining material containing epoxy resin
Agent can still be cracked due to the corrosion of chemical reagent and the factors such as aging of epoxy resin with pump cover inner wall in use
Or delamination, cause tensile strength insufficient, influences service life.
Chinese utility model patent (CN201496325, the pump cover of waste acid concentration axial flow pump) discloses a kind of embedding by metal
The pump cover of part and old layer composition, old layer are fixed on metal insert using liner outsourcing form, and metal insert is equipped with several
Hole or dovetail groove or reinforcing rib, lining are the materials such as fluoroplastics, glass reinforced plastic, are filled in the dovetail groove on metal insert Nei simultaneously outsourcing
On metal insert, the bond strength of lining and metal insert is improved.Chinese invention patent (CN101041262, a kind of steel modeling
The manufacturing method of composite anticorrosive mixed-flow pump) disclose a kind of pump, pump cover material is cast iron, skeleton made of carbon steel, in pump cover
Surface has the dovetail groove to differ in size, and the fluoroplastics after heating are expressed in dovetail groove by pressurizing unit, and
On the surface of covering after drilling, tapping, locked with screw.Chinese utility model patent (CN201420704, a kind of liner of pump)
A kind of method of pump surface setting liner in metal material is disclosed, can be arranged in several on the surface of pump postoperculum big outer small
Slot will inject in slot after fluorine material heating melting, be not only to maintain the machinery of pump in conjunction with the pump postoperculum of metalwork after cooling
Intensity also improves the corrosion resistance of pump.Above-mentioned several method is by covering setting dovetail groove or interior big outer sulculus in metal pump
Method, the lining material after making heating first fills in dovetail groove or interior big outer sulculus, ensures lining material by special slot
Material is difficult to pull away from metal pump cover, and still, at the position of not set groove-like structure, especially adjacent edges are combined still
Defective tightness, lining can easily peel off or delamination, leads to occur defect in use process.
Summary of the invention
Problem to be addressed is how existing pump cover metallic framework defective tightness in conjunction with inner lining material, tensile strength by the present invention
Not enough, easily there is lining to fall off, crack or edge delamination leakage, shorten the technical problems such as product service life.
In order to solve the above-mentioned technical problem, the invention discloses a kind of pump cover and its manufacturing methods, and wherein pump cover includes gold
Belong to casing play and non-metallic inner liner layer, non-metallic inner liner layer are coated on the inner surface of metallic framework layer；During the work time, it is situated between
Matter is only contacted with the non-metallic inner liner layer on pump cover, will not touch metallic framework layer, avoids medium to metallic framework layer
Corrosion, can extend the service life of pump cover.
Groove I and transition structure are equipped on metallic framework layer；The non-metallic inner liner layer is fully populated in groove I and mistake
It crosses in structure；Design groove I and transition structure can make the filling of non-metallic inner liner layer wherein, increase non-metallic inner liner layer and metal
The contact area of casing play improves the binding force of the two.
Further, groove I and transition structure are located at the inside of metallic framework layer, and the corner inside groove I is circle
Angle design can avoid stress and concentrate, it is ensured that the intensity of metallic framework layer.
Further, Liang≤1 Shuo of groove I, groove I can be regularly arranged more on metallic framework layer inner surface
A circular groove is also possible to around the center of metallic framework layer with the formal distribution of concentric loop on the inside of metallic framework layer
The combination of multiple toroidal cavities on surface or the two and other various distribution forms.
Further, groove I is interior big outer small structure, i.e. the bottom width of groove I is greater than opening face width, can make in this way
Non-metallic inner liner layer is more embedded in metallic framework layer, increases the difficulty that external force involves removing non-metallic inner liner layer, further
Improve the bond strength of non-metallic inner liner layer and metallic framework layer.
Further, transition structure is located at the inside outer edge of metallic framework layer.The outer edge of pump cover and endface are
The edge that non-metallic inner liner layer and metallic framework layer combine, the defects of being easy to produce peeling, delamination, cracking and stomata herein, if
Meter transition structure can play booster action, reduce drawbacks described above.
Further, the rounding off curved surface of Kuo≤2 transition structure Bao groove II and connection adjacent grooves II, groove II
Internal corner is fillet design, and is connected between different groove IIs by curved surface, and junction is also fillet design, is avoided
Stress is concentrated, and guarantees the intensity of metal casing play.
Further, groove II is also interior big outer small structure, i.e. the bottom width of groove II is greater than opening face width, and recessed
The design principle of slot I is identical.
Wherein the dimensional structure of groove I and groove II may be the same or different；Ruler of the usual groove II than groove I
It is very little small.
Further, one or more of materials such as stainless steel, carbon steel or spheroidal graphite cast-iron may be selected in metallic framework layer
Mixture；
Non-metallic inner liner layer material component includes silicon carbide ceramics and phenolic resin, and silicon carbide ceramics not only has excellent
Mechanical property: high-flexural strength, high rigidity, and there is excellent anti-oxidant, corrosion-resistant and wear-resisting property, under high-temperature condition still
With good mechanical property.Phenolic resin is a kind of important chemical binder, can be good with a variety of organic or inorganic fillers
Good compatible, energy secure bond is not easy to be rushed by medium in metallic framework layer inner surface after thermoplastic phenolic resin heating melting
It brushes off.
The present invention also protects a kind of manufacturing method of pump cover simultaneously, includes the following steps:
(1) using the method for machining, groove I and transition structure are opened up on the inside of metallic framework layer；
(2) surface sand-blasting process is carried out to metallic framework layer, is then cleaned；
(3) metallic framework layer and casting mold are assembled, is put into Vacuum Heat running gate system；
(4) non-metallic inner liner layer material is uniformly mixed, Vacuum Heat running gate system is then added；
(5) carrying out heating to nonmetallic materials layer material makes its melting, and the non-metallic inner liner layer material vacuum of melting is poured
Note obtains pump cover in the inside of metal framework structure layer after cooling and shaping.
Metallic framework layer is designed according to the specific structure of pump and application places, metallic framework layer can be various not similar shapes
Shape can be used method of the invention and design the non-metallic material bed of material on the inside of it；To the metal for having opened up groove I and transition structure
Casing play carries out surface sand-blasting process, makes its surface roughness Ra=1.6-3.5, preferably 2.5, under the roughness, metal bone
Rack-layer surface has subtle out-of-flatness, micro- to see cutter trade, more enough preferably in conjunction with the melting non-metallic material bed of material, metal bone
Rack-layer and the bond strength of the non-metallic material bed of material are optimal.
The fusing point of thermoplastic phenolic resin is at 350 DEG C or so, and the fusing point of silicon carbide is at 1000 DEG C or more, heating nonmetal
Liner layer raw material, when temperature reaches 350 DEG C or more, phenolic resin fusing, silicon carbide is evenly distributed in phenolic resin melt,
In vacuum pouring system, melt is filled and is coated on the inside of metallic framework layer, and under vacuum, melt fills first
Groove I and transition structure, then coated, when reaching suitable thickness, stops casting, cooled down, phenolic resin is cooled to
Just it is coated on the internal layer surface of metallic framework layer after type securely jointly with silicon carbide.The excellent adhesive property of phenolic resin makes non-
Metal material layer and metallic framework layer are firmly combined, the high-intensitive intensity for increasing pump cover again of silicon carbide.
In vacuum pouring, the presence of groove I and groove II can play scavenging action, keep blanking more smooth, reduce non-
The quality defects such as the stomata and cracking of metal inner lining layer, further increase the attachment between non-metallic inner liner layer and metallic framework layer
Intensity.
Numerical control processing detection, ultrasonic inspection and the full-scale detection of three coordinates are carried out to the pump cover obtained after cooling and shaping
Afterwards, size and performance pump cover product up to standard are qualified products.
In addition, corner all on the side contacted on metallic framework layer with non-metallic inner liner layer is both designed as excessively
Fillet can avoid the straight turning bring problem of stress concentration of tradition, reduces the cracking of non-metallic inner liner layer, peels off.
Pump cover of the invention includes front pump cover and rear pump cover, either front pump cover or rear pump cover, the metallic framework of pump cover
Layer is all located at the outside of the pump housing；Non-metallic inner liner layer is located at pump body, and is coated on metallic framework layer inner surface, in pump
Physical contact between media, can play the role of protect metallic framework layer.
Compared with prior art, pump cover of the invention and its manufacturing method have the advantage that
1, the groove I of big outer small structure, increases non-metallic inner liner layer and metal bone in being arranged on pump cover metallic framework
Tensile strength between frame reduces a possibility that delamination occurs for non-metallic inner liner layer.
2, the edge of pump cover metallic framework is equipped with transition structure, increases between edge liner layer and metallic framework
Binding force avoids edge peeling, the delamination of non-metallic inner liner layer.
3, the groove II in groove I and transition structure can nonmetallic materials blanking be smooth, abundant exhaust in vacuum pouring,
Avoid the stomata and cracking of non-metallic inner liner layer.
4, the pump cover intensity that the present invention obtains is high, and corrosion resistance and good, service life greatly prolongs.
Detailed description of the invention:
Fig. 1: the three-dimensional structure diagram of metallic framework layer；
Fig. 2: the main view of metallic framework layer；
Fig. 3: metallic framework layer is along its center line, that is, direction A-A cross-sectional view；
Fig. 4: the partial enlarged view of groove I；
Fig. 5: the partial enlarged view of transition structure.
Description of symbols: 1: groove I；2: transition structure；11: groove I-a；12: groove I-b；13: groove I-c；14:
Groove I-d；21- groove II；211: groove II-e；212: groove II-f；22- rounding off curved surface.
Specific embodiment:
With reference to the accompanying drawing, it is described in detail by specific embodiment, illustrates technical solution of the present invention.
In the present embodiment, attached drawing and verbal description are checked for convenience, eliminate non-metallic inner liner layer, but conduct herein
A part of pump cover, non-metallic inner liner layer are fully populated in groove I 1 and transition structure 2, and are coated on the interior of metallic framework layer
Side.
Metallic framework layer is made by corrosion resistant stainless steel material through die cast and by finishing；Non-metallic inner liner layer
Material is the mixture of phenolic resin and silicon carbide ceramics, and wherein the mass ratio of phenolic resin and silicon carbide ceramics is 1:0.5-2.
As illustrated in fig. 1 and 2, the inner surface of metallic framework layer is in concave, is equipped at the outer edge of inner surface
Transition structure, sets that there are two groove Is 11 and 12 on the upper surface of inner surface.
Fig. 3 is cross-sectional view of the metallic framework layer along the direction A-A, it can be seen that metallic framework layer inner surface be equipped with 4 with
The center of metallic framework layer is the groove I in concentric circles arrangement in the center of circle, is respectively: two on inner surface upper surface
Groove I 11 and 12, is denoted as a and b, i.e., and 11 and 12；A groove I 13 on recessed inner surface side, is denoted as c；Recessed
Groove I 14 on inner surface lower end surface, is denoted as d.In the present embodiment, four groove Is 11,12,13 are identical with 14 groove depth,
Width is also identical；And the radius of four circular grooves I 1 is different, i.e. the perimeter of groove I 1 is different, and the perimeter of groove I 1 is descending
11 > 12 > 13 > 14 are followed successively by, as a > b > c > d.
Fig. 4 is the partial enlarged view of groove I 1, and the bottom width of groove I 1 is equal to the filling thickness of non-metallic inner liner layer, recessed
The opening face width of slot I 1 is 0.6 times of non-metallic inner liner layer filling thickness, and the depth of groove I 1 is the filling of non-metallic inner liner layer
0.8 times of thickness, the corner of groove I 1 are fillet design, and the radius of fillet is the 0.16 of non-metallic inner liner layer filling thickness
Times.
4 groove Is 1 are uniformly distributed in the different parts of metallic framework layer inner surface, increase non-metallic inner liner layer with
Bond strength between metallic framework layer.
Fig. 5 is the partial enlarged view of transition structure 2,2 Kuo≤2 Bao groove II 21 of transition structure and connection adjacent grooves II
Rounding off curved surface 22, groove II 21 include 2 using the center of metallic framework layer be the center of circle in concentric circles arrangement
Groove, the depth of groove II 2 are the half of groove I 1, and width is also the half of groove I 1；
2 groove IIs 211 and 212 are denoted as e and f respectively, and wherein groove II 211 is perpendicular to metallic framework layer inner surface
Upper surface, groove II 212 are parallel to the upper surface of metallic framework layer inner surface, the groove depth of groove II 211 and groove II 212
Identical, width is also identical, and groove II 212 is located at the outside of groove II 211, i.e. the radius of f and length is greater than e.211 He of groove II
The corner of groove II 212 is fillet design, and connecting groove II 211 and groove II 212 is a rounding off curved surface 22,
Problem of stress concentration can be reduced.
The lower part of groove II 211 is non-metallic inner liner layer filling thickness at a distance from metallic framework layer inner surface upper surface
0.5 times, the lower part of groove II 212 at a distance from the end face of metallic framework layer outer be non-metallic inner liner layer filling thickness 0.5
Times.
In other embodiments, groove I 1 and transition structure 2, which can not be, is distributed using metallic framework layer center as dot
A series of concentric circles are also possible to the groove-like structure being spaced apart in above-mentioned concentric circumferences, can also be and otherwise divide
Groove-like structure of the cloth on metallic framework layer inner surface.
The manufacturing method of the pump cover includes the following steps:
(1) using the method for machining, groove I 1, transition structure 2 are opened up on the inside of metal framework structure layer；
(2) interior outer surface blasting treatment is carried out to above-mentioned metal framework structure layer, makes its Ra=2.5, and cleaned；
(3) metal framework structure layer and casting mold are assembled, is put into Vacuum Heat running gate system；
(4) Vacuum Heat running gate system is added after being uniformly mixed the mixture of phenolic resin and silicon carbide ceramics；
(5) carrying out heating to the mixture of phenolic resin and silicon carbide ceramics melts phenolic resin, by the mixing of melting
Object material vacuum is cast in the inside of metal framework structure layer, and pump cover is obtained after cooling and shaping.
(6) to after casting pump cover carry out numerical control processing detection, ultrasonic inspection and the full-scale detection of three coordinates, size and
Performance pump cover up to standard is qualified products.
In order to be compared with pump cover of the invention, designed according to common pump cover structure currently on the market, i.e., by pump cover
The surface size of metallic framework simply reduces, and then fills the size for reducing part by nonmetallic materials liner again, raw
Produce and test ten products, the tensile strength of nonmetallic materials liner and metallic framework is 12-13Mpa.Pump postoperculum plate end
The defects of cracking at face and edge, delamination, stomata rate is greater than 87%.
After applying the present invention, produce and test ten products, the tension of nonmetallic materials liner and metallic framework is strong
Degree is greater than 22Mpa.The defects of cracking at pump cover end face and edge, delamination, stomata, rate was less than 3%.
The foregoing is merely presently preferred embodiments of the present invention, is not limited to invent, all in design concept of the invention
Without within obvious, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention product.
Claims (10)
1. a kind of pump cover, including metallic framework layer and non-metallic inner liner layer, it is characterised in that:
The non-metallic inner liner layer is coated and fixed on the inner surface of metallic framework layer；
The metallic framework layer is equipped with groove I and transition structure；
The non-metallic inner liner layer is fully populated in groove I and transition structure.
2. pump cover as described in claim 1, it is characterised in that: the groove I and transition structure are located at the interior of metallic framework layer
Side.
3. pump cover as claimed in claim 2, it is characterised in that: Liang≤1 Shuo of the groove I.
4. pump cover as claimed in claim 2, it is characterised in that: the transition structure is located at the inside outer edge of metallic framework layer
Place.
5. pump cover as claimed in claim 2, it is characterised in that: the bottom width of the groove I is greater than opening face width.
6. pump cover as claimed in claim 2, it is characterised in that: transition structure Bao Kuo≤2 groove II and connection are adjacent
The rounding off curved surface of groove II.
7. pump cover as claimed in claim 6, it is characterised in that: the bottom width of the groove II is greater than opening face width.
8. pump cover as described in claim 1, it is characterised in that: the metallic framework layer material is stainless steel, carbon steel or spheroidal graphite
The mixture of one or more of cast iron.
9. pump cover as described in claim 1, it is characterised in that: the non-metallic inner liner layer material component includes silicon carbide ceramics
And phenolic resin.
10. a kind of manufacturing method of pump cover as claimed in any one of claims 1-9 wherein, which comprises the steps of:
(1) using the method for machining, groove I and transition structure are opened up on the inside of metallic framework layer；
(2) surface sand-blasting process is carried out to metallic framework layer, is then cleaned；
(3) metallic framework layer is put into Vacuum Heat running gate system；
(4) non-metallic inner liner layer material is uniformly mixed, Vacuum Heat running gate system is then added；
(5) carrying out heating to non-metallic inner liner layer material makes its melting, and the non-metallic inner liner layer material vacuum pouring of melting is existed
The inside of metal framework structure layer obtains pump cover after cooling and shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811220459.7A CN109209856A (en) | 2018-10-19 | 2018-10-19 | A kind of pump cover and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811220459.7A CN109209856A (en) | 2018-10-19 | 2018-10-19 | A kind of pump cover and its manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109209856A true CN109209856A (en) | 2019-01-15 |
Family
ID=64981338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811220459.7A Pending CN109209856A (en) | 2018-10-19 | 2018-10-19 | A kind of pump cover and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109209856A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630563A (en) * | 2019-08-27 | 2019-12-31 | 安徽卧龙泵阀股份有限公司 | Centrifugal pump shell with high stability |
| CN110821819A (en) * | 2019-10-28 | 2020-02-21 | 宝鸡市隆庆金属材料制品厂 | Stainless steel pump cover of fluid pump, fluid pump and machining method of pump cover |
| CN111472995A (en) * | 2020-04-16 | 2020-07-31 | 襄阳五二五泵业有限公司 | Manufacturing method of silicon carbide ceramic lining metal pump cover |
| CN111775307A (en) * | 2020-07-01 | 2020-10-16 | 襄阳五二五泵业有限公司 | Forming process of silicon carbide ceramic composite metal pump body |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630563A (en) * | 2019-08-27 | 2019-12-31 | 安徽卧龙泵阀股份有限公司 | Centrifugal pump shell with high stability |
| CN110821819A (en) * | 2019-10-28 | 2020-02-21 | 宝鸡市隆庆金属材料制品厂 | Stainless steel pump cover of fluid pump, fluid pump and machining method of pump cover |
| CN111472995A (en) * | 2020-04-16 | 2020-07-31 | 襄阳五二五泵业有限公司 | Manufacturing method of silicon carbide ceramic lining metal pump cover |
| CN111775307A (en) * | 2020-07-01 | 2020-10-16 | 襄阳五二五泵业有限公司 | Forming process of silicon carbide ceramic composite metal pump body |
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