CN109986081A - A kind of porous heater, heater production method and the burner for being equipped with the heater - Google Patents
A kind of porous heater, heater production method and the burner for being equipped with the heater Download PDFInfo
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- CN109986081A CN109986081A CN201711490640.5A CN201711490640A CN109986081A CN 109986081 A CN109986081 A CN 109986081A CN 201711490640 A CN201711490640 A CN 201711490640A CN 109986081 A CN109986081 A CN 109986081A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims description 37
- 229910045601 alloy Inorganic materials 0.000 claims description 19
- 239000000956 alloy Substances 0.000 claims description 19
- 239000011230 binding agent Substances 0.000 claims description 14
- 206010037660 Pyrexia Diseases 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 238000010923 batch production Methods 0.000 abstract description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 15
- 239000000203 mixture Substances 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 238000005496 tempering Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 6
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- 238000004663 powder metallurgy Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 5
- 241000264877 Hippospongia communis Species 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000001768 carboxy methyl cellulose Substances 0.000 description 5
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 5
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 239000000567 combustion gas Substances 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 238000004898 kneading Methods 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 description 2
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000004014 plasticizer Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 241000257303 Hymenoptera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 239000003974 emollient agent Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000006262 metallic foam Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
- F23D14/14—Radiant burners using screens or perforated plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The present invention relates to a kind of porous heater, heater production method and the burners for being equipped with the heater, heater is made of multiple layer metal dusty material, the pyroconductivity of multilayer material is different, runs through the hole of multiple layer metal dusty material with several on the heater.Combustion stability, and simple process can be improved in the present invention not only stable structure, and production precision is high, and manufacturing cost is low, is particularly suitable for standard batch production.
Description
Technical field
The present invention relates to a kind of installation heater on the burner, in particular to a kind of porous heater and heater
Production method, while being related to that the burner of the porous heater is installed.
Background technique
The existing fever carrier on infrared burner of household gas stove has following two in the market, and one is bees
Nest ceramic heating carrier, wherein maximum with cordierite honeycomb ceramic fever carrier usage amount, stability is preferable, and cost performance is high, easily
In mass production.Another kind is metal beehive fever carrier, welds manufactured metal bee using the winding of stainless steel metal foil
Nest generates heat, and carrier dosage is larger, and this metal beehive fever carrier processing technology thereof is mature, is examined by the market of several years
It tests, there has also been large increases in terms of stability for product.
Wherein, ceramic honey comb heating board disadvantage is exactly that thermal shock resistance is poor, and infrared ceramic porcelain plate burner was using
Ceramic wafer is easily burst in journey, in addition, can only process vertical through-hole because the processing technology of ceramic wafer is limited, be easy to cause
Tempering.For metal sheet band wound form honeycomb heating body, needs to weld one layer of stainless (steel) wire in lower surface or be sent out in metal beehive
Hot body lower surface adds one layer of metal foam to play heat-insulated and balance airflow function, this is to overcome the excessively high appearance of metal material thermal conductivity
Burner is easily caused to generate tempering phenomenon, fever carrier medium itself wettability difference does not have steady air flow function that burner is caused to fire
Insufficient taken precautionary measures are burnt, but since there is metal material the characteristic expanded with heat and contract with cold and metal honeycomb heating body to use
Environment is more severe, and the metal honeycomb heating body of both the above structure has very big hidden danger in use.
Summary of the invention
The present invention is to provide a kind of stable structure main dissatisfied the technical issues of determining, and combustion stability can be improved, and effectively keeps away
Exempt from the porous heater of tempering phenomenon generation, while a kind of simple process being provided, production precision is high, and the fever that manufacturing cost is low
Body production method, and the burner of the heater is installed.
To achieve the above object, first technical solution of the invention is:
A kind of porous heater, the heater are made of multiple layer metal dusty material, and the pyroconductivity of multilayer material is not
Together, run through the hole of multiple layer metal dusty material with several on the heater.
Further, the heater is upper layer and lower layer structure, and the pyroconductivity of upper layer metal powder material is greater than lower layer's gold
Belong to the pyroconductivity of dusty material.
Further, the thickness on the upper layer is greater than the thickness of lower layer.
Further, the hole is gradient pore, including the multistage being interconnected but diameter is different.
Further, the hole is two sections, respectively second hole in first hole on upper layer and lower layer, the diameter in first hole
Greater than the diameter in the second hole.
Second technical solution of the invention is:
A kind of production method of porous heater is specifically comprised the following steps: using powder metallurgic method
A, binder will be added respectively in metal powder or alloy powder with different pyroconductivities；
B, it respectively after mixing, then is added separately in the different layers of mold, and utilizes and have several spicules
The metal powder of multilayer or alloy powder are suppressed the multilayer with several through holes and porous base by multilayer compacting tool set
Body；
C, for green body after drying, removing binder, P/m Porous is made in the sinter molding in vacuum or protective atmosphere
Heater.
Further, the heater is upper layer and lower layer structure, and the pyroconductivity of upper layer metal powder material is greater than lower layer's gold
Belong to the pyroconductivity of dusty material.
Further, the perforative hole is gradient pore, including the multistage being interconnected but diameter is different, the spicule tool
There is diameter gradient, matches with the diameter gradient in the hole.
Third technical solution of the invention is:
A kind of burner, including burner, are equipped with heater on the burner, and the heater is as described above more
Hole heater.
4th technical solution of the invention is:
A kind of burner, including burner are equipped with heater on the burner, and the heater is using as described above
Production method production.
In conclusion a kind of porous heater provided by the invention, heater production method and being equipped with the heater
Burner has the advantages that compared with prior art
(1) porous heater of the invention uses powder metallurgy integral structural member, not only stable structure, and burning can be improved
Stability.
(2) porous heater of the invention uses double-layer structure, and the pyroconductivity of upper layer of material is greater than the heat transfer of lower layer
Rate, and fire output hole therein uses graded pore structure, the fever carrier being particularly suited on gas-fired equipment burner uses, steady fire
Performance is more preferable, burns more abundant, and can effectively avoid generation tempering phenomenon, flame is realized inside the aperture of porous body upper surface
Stablize burning, greatly improves the stability and efficiency of combustion of burning.
(3) present invention is suppressed in porous heater manufacturing process using the compacting tool set for being equipped with several spicules
Molding, not only simple process, production precision is high, and manufacturing cost is low, and stock utilization is high, and easy to form with gradient pore
Structure is particularly suitable for standard batch production.
Detailed description of the invention
Fig. 1 is heating element structure of the present invention.
As shown in Figure 1, heater 1, upper layer 1a, lower layer 1b, hole 2, the first hole 2a, the second hole 2b.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing:
Embodiment one:
As shown in Figure 1, providing a kind of porous heater in the present embodiment, it is powder metallurgy integral structural member, is generating heat
There is several perforative holes 2 up and down, hole 2 is the fire output hole of burner, and combustion gas is fired on the upper surface of heater 1 on body 1
It burns.The upper surface of heater 1 can be plane, or concave surface or male and female face.
In the present embodiment, heater 1 uses the structure of multilayer, and the pyroconductivity of multilayer material is different, preferably heater 1
Using upper and lower two layers of structure, the heat that the pyroconductivity of upper layer 1a metal powder material is greater than lower layer 1b metal powder material is passed
Conductance, and the thickness of upper layer 1a is much larger than the thickness of lower layer 1b.
Porous heater 1 is androgynous anisotropic gradient-structure body in the present invention, and the pyroconductivity of top section is high, lower layer part
The pyroconductivity divided is low, and not only structure is more stable, and steady fiery performance is more preferably, and combustion-supporting effect is more preferable, and the heat for improving burner is negative
Lotus keeps burning more abundant, and efficiency of combustion is higher, and since underclad portion pyroconductivity can play the effect for effectivelying prevent being tempered
Fruit, the fever carrier being particularly suited on gas-fired equipment burner use.
Embodiment two:
As shown in Figure 1, in the present embodiment, in order to make more to fill using the infrared radiation burner burning of this fever carrier
Point, it further avoids burner and tempering phenomenon occurs, it is preferable that hole 2 uses the structure of gradient pore, including interconnected but diameter is not
Same multistage.Cooperate the double-layer structure of heater 1, hole 2 uses the graded pore structure of two-part.It is provided on the 1a of upper layer several
A first hole 2a is provided with several second holes 2b, the first hole 2a and the second hole 2b or more connection on lower layer 1b and is formed and run through
Heater 1 runs through through-hole with gradient, second hole 2b of the diameter greater than lower layer 1b of the first hole 2a of preferably upper layer 1a
Diameter, first hole 2a can with one or be simultaneously connected to multiple second hole 2b, preferred each first hole 2a in the present embodiment
It is connected to a second hole 2b, i.e. the first hole 2a and the second hole 2b are arranged in one-to-one relationship.In addition, the length of the first hole 2a
Greater than the length of the second hole 2b, i.e. the thickness of upper layer 1a is significantly larger than the thickness of lower layer 1b, between the first hole 2a and the second hole 2b
Length it is more different according to different burning gases than with aperture ratio.
Premixed gas after combustion gas and air pre-mixing is introduced into the second hole 2b of lower layer 1b by premix chamber, using second
Hole 2b enters in the first hole 2a of upper layer 1a, burns on the upper surface of upper layer 1a.Due to the upper layer part 1a of porous heater 1
Aperture is big, and lower layer's 1b part aperture is small, and lower layer 1b can play the effect of back-fire relief, steady fire, when premixed gas is from the aperture lower layer 1b
When small back-fire relief distribution layer enters the big burning zone in the upper layer aperture 1a, premixed gas is lighted after one steady one puts, and flame is more
It is realized inside the aperture of hole body upper surface and stablizes burning.Wherein, crucial parameter is critical fire-extinction diameter (dFace), in the present embodiment,
Aperture size d≤d of the second hole 2b on lower layer 1bFace, to prevent tempering phenomenon, and the first hole 2a on the 1a of upper layer
Aperture size is necessary for d >=dFace, when mixed airflow enters the first hole 2a of upper layer 1a from the second hole 2b of lower layer 1b, pecklet
Quasi- number generates suddenly change, and flame is stablized in upper layer 1a and burns after igniting.In general, to all combustion gas, Pe's (the quasi- number of pecklet)
Critical value is about 65, Pe<65 of 1 lower layer 1b of heater, Pe>65 of upper layer 1a.Powder metallurgy on gas-fired equipment burner is more
Hole generates heat carrier only in this case, and flame (upper layer 1a) could stablize propagation, burning in porous body, flame combustion
Stability is greatly improved.
Porous heater 1 is androgynous different mesh and androgynous anisotropic gradient-structure body, top section pyroconductivity in the present invention
Height aperture is big, and underclad portion pyroconductivity is low and aperture is small, and not only structure is more stable, and steady fiery performance is more preferably, combustion-supporting effect
Fruit is more preferable, burns more abundant, and efficiency of combustion is higher, and flame can be stablized on upper layer and burn after igniting, since underclad portion heat passes
Conductance can play the effect for effectivelying prevent tempering, and the fever carrier being particularly suited on gas-fired equipment burner uses.
Embodiment three:
In the present embodiment, a kind of production method of porous heater is provided, using powder metallurgic method, specifically includes following step
It is rapid:
A, binder, the heat of two kinds of metal powders or alloy powder are added respectively in two kinds of metal powders or alloy powder
Conductivity is different.
Wherein, binder preferably uses water based adhesive, and the component of binder includes bonding component, plasticizer components, profit
Sliding component, solvent.Being bonded component mainly includes polyvinyl alcohol, and plasticizer components mainly include carboxymethyl cellulose, emollient component
It include mainly glycerol, solvent mainly includes ethyl alcohol, remaining is water.The formulation by weight of binder each component is preferably polyvinyl alcohol
10-15%, carboxymethyl cellulose 10-20%, glycerol 1-5%, ethyl alcohol 1-6%, surplus are water.
Metal powder or alloy powder include chromium-nickel or chromium-nickel-molybdenum stainless steel, cathode copper, iron-chrome-aluminum heat-resisting alloy,
Iron/copper dusty material.The weight proportion of metal powder or alloy powder and binder is preferably 70-80%: 30-20%.
B, two kinds of metal powders or alloy powder and binder respectively after evenly mixing, using with several spicules
Metal powder or alloy powder are suppressed the porous body with several through holes 2 by multilayer compacting tool set.
Perforative hole 2 be mutually all gradient pore described in embodiment two, including being interconnected but the different multistage of diameter.It is preferred that
Using the graded pore structure of two-part, correspondingly heater 1 uses upper and lower two layers of structure.It is provided on the 1a of upper layer several
A first hole 2a is provided with several second holes 2b, the first hole 2a and the second hole 2b or more connection on lower layer 1b and is formed and run through
Heater 1 runs through through-hole with gradient, and the diameter of the first hole 2a of upper layer 1a is greater than the diameter of the second hole 2b of lower layer 1b,
The length of first hole 2a is greater than the length of the second hole 2b.
The spicule being mounted on mold preferably uses stainless pin, and has diameter gradient, the diameter gradient phase with hole 2
Matching is two-part structure, and for the ease of demoulding, the diameter of spicule increases in gradient from front to back, i.e., front fine and rear thick, de-
Stainless pin is extracted out from green body while mould, that is, forms the above-mentioned different double-layer porous heater 1 of purpose of consubstantiality.
Specifically, the prepared alloy powder of ratio and water based adhesive are pre-mixed 40 points in blender by weight
Then clock is kneaded 120-150 minutes on kneading machine, base group is made, uniformly blending tool, there are two types of the powder of pyroconductivity property
Then two kinds of mixtures are successively respectively put into the multilayer pressing die with front fine and rear thick more stainless pins by last metallurgy mixture
In the different layers of tool, the compression moulding under the extruding force of < 200MPa.
C, green body is after drying, removing binder, and the sinter molding in vacuum or protective atmosphere, being made has androgynous different mesh
Structure P/m Porous heating element structure part.
Specially repressed green body is dry at a temperature of 200 DEG C of <, vacuum-sintering at a temperature of 750 DEG C -1350 DEG C, i.e.,
It can be made into the P/m Porous gradient-structure part with androgynous different mesh structure.
Such as example 1, when the alloy powder used is chromium-nickel, chromium-nickel-molybdenum stainless steel, the formulation by weight of binder is polyethylene
Alcohol 15%, carboxymethyl cellulose 15%, glycerol 5%, ethyl alcohol 2%, water 63%, being prepared by 80:20 and 70:30 weight ratio
Two kinds of alloy powders and water based adhesive be independently pre-mixed in blender 40 minutes, be then kneaded on kneading machine
120-150 minutes, base group is made, uniformly blending tool, there are two types of the powder metallurgy mixtures of pyroconductivity property, then successively
Two kinds of mixtures are respectively put into the different layers of the multilayer compacting tool set with front fine and rear thick more stainless pins, in <
Compression moulding under the extruding force of 200MPa, green compact is dry at a temperature of 200 DEG C of <, vacuum-sintering at a temperature of 1200-1350 DEG C,
It can be made into the P/m Porous gradient-structure part with androgynous different mesh structure.
Example 2: when the alloy powder used is tin bronze, cathode copper, iron/copper, the formulation by weight of binder is polyvinyl alcohol
15%, carboxymethyl cellulose 15%, glycerol 5%, ethyl alcohol 2%, water 63%, prepared by 60:40 and 50:50 weight ratio
Two kinds of alloy powders and water based adhesive are independently pre-mixed 40 minutes in blender, are then kneaded on kneading machine
120-150 minutes, base group is made, uniformly blending tool, there are two types of the powder metallurgy mixtures of pyroconductivity property, then successively
Two kinds of mixtures are respectively put into the different layers of the multilayer compacting tool set with front fine and rear thick more stainless pins, in <
It is suppressed under the extruding force of 200MPa, green compact is dry at a temperature of 200 DEG C of <, vacuum-sintering at a temperature of 1200-1350 DEG C
The P/m Porous gradient-structure part with androgynous different mesh structure is made.
Example 3, when the alloy powder used is iron-chrome-aluminum heat-resisting alloy, the formulation by weight of binder is polyvinyl alcohol
10%, carboxymethyl cellulose 20%, glycerol 1%, ethyl alcohol 6%, water 63%, prepared by 90:10 and 80:20 weight ratio
Alloy powder and water based adhesive are independently pre-mixed 40 minutes in blender, and 120- is then kneaded on kneading machine
150 minutes, base group is made, uniformly blending tool, there are two types of the powder metallurgy mixtures of pyroconductivity property, then successively by two
Kind mixture is respectively put into the different layers of the multilayer compacting tool set with front fine and rear thick more stainless pins, < 200MPa's
It is squeezed under extruding force, extruded stock is dry at a temperature of 200 DEG C of <, vacuum or the H2 (dew point-of drying at a temperature of 1250-1350 DEG C
60 DEG C) it is sintered in atmosphere, that is, it can be made into the P/m Porous gradient-structure part with androgynous different mesh structure.
The present invention uses the compacting tool set compression moulding for being equipped with several spicules, not only simple process, process flow
Short, production precision is high, and manufacturing cost is low, and stock utilization is high, and the structure easy to form with gradient pore, is conducive to standard
Change and produces in enormous quantities.And the different target structure body of consubstantiality made by the technique, it is especially susceptible to real in the upper surface of heater
The structure of existing plane, concave surface or male and female face.
There is the different mesh structural body of consubstantiality of gradient pore using the spicule production with gradient, gel casting also can be used
Technique and injection molding technique make.
Example IV:
A kind of burner, including burner are provided in the present embodiment, there is gas premixing chamber, one end of premix chamber on burner
It is connected with ejector pipe, heater 1 is installed above premix chamber, heater 1 is using porous as provided in embodiment one
Heater, the porous heater are made of the production method as provided in embodiment two.
Premixed gas after combustion gas and air pre-mixing is introduced into the second hole 2b of lower layer 1b by premix chamber, using second
Hole 2b enters in the first hole 2a of upper layer 1a, burns on the upper surface of upper layer 1a.The different mesh of consubstantiality used due to the heater 1
Anisotropic 1 structure of porous heater with consubstantiality, and the upper layer part the 1a high aperture of pyroconductivity is big, the part lower layer 1b pyroconductivity is low
Aperture is small, when the premixed gas back-fire relief distribution layer small from the aperture lower layer 1b enters the big burning zone in the upper layer aperture 1a, lower layer 1b
The effect of back-fire relief, steady fire can be played, premixed gas is lighted after one steady one puts, and flame is inside the aperture of porous body upper surface
It realizes and stablizes burning, flame can be stablized on upper layer and burn after igniting, and effectively prevent since underclad portion pyroconductivity can play
The effect of tempering.
As described above, the plan content in conjunction with given by attached drawing, can derive similar technical solution.But it is all not take off
Content from technical solution of the present invention, according to the technical essence of the invention it is to the above embodiments it is any it is simple modification, etc.
With variation and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of porous heater, it is characterised in that: the heater is made of multiple layer metal dusty material, the heat of multilayer material
Conductivity is different, runs through the hole of multiple layer metal dusty material with several on the heater.
2. a kind of porous heater according to claim 1, it is characterised in that: the heater is upper layer and lower layer structure,
The pyroconductivity of upper layer metal powder material is greater than the pyroconductivity of lower metal dusty material.
3. a kind of porous heater according to claim 2, it is characterised in that: the thickness on the upper layer is greater than the thickness of lower layer
Degree.
4. a kind of porous heater according to any one of claims 1 to 3, it is characterised in that: the hole is gradient pore, packet
Include interconnected but different diameter multistage.
5. a kind of porous heater according to claim 4, it is characterised in that: the hole is two sections, respectively upper layer
Second hole in the first hole and lower layer, the diameter in first hole are greater than the diameter in the second hole.
6. a kind of production method of porous heater, it is characterised in that: use powder metallurgic method, specifically comprise the following steps:
A, binder will be added respectively in metal powder or alloy powder with different pyroconductivities；
B, it respectively after mixing, then is added separately in the different layers of mold, and utilizes the multilayer for having several spicules
The metal powder of multilayer or alloy powder are suppressed the multilayer with several through holes and porous green body by compacting tool set；
C, for green body after drying, removing binder, P/m Porous fever is made in the sinter molding in vacuum or protective atmosphere
Body.
7. a kind of production method of porous heater according to claim 6, it is characterised in that: the heater is upper and lower
Double-layer structure, the pyroconductivity of upper layer metal powder material are greater than the pyroconductivity of lower metal dusty material.
8. a kind of production method of porous heater according to claim 6, it is characterised in that: the perforative hole is ladder
Hole is spent, including the multistage being interconnected but diameter is different, the spicule has diameter gradient, the diameter gradient phase with the hole
Matching.
9. a kind of burner, including burner are equipped with heater on the burner, it is characterised in that: the heater is power
Benefit requires the described in any item porous heaters of 1-5.
10. a kind of burner, including burner are equipped with heater on the burner, it is characterised in that: the heater uses
The described in any item production method production of claim 6-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711490640.5A CN109986081A (en) | 2017-12-30 | 2017-12-30 | A kind of porous heater, heater production method and the burner for being equipped with the heater |
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Family
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| EP0450897A2 (en) * | 1990-04-03 | 1991-10-09 | Ngk Insulators, Ltd. | Heat-resistant metal monolith and manufacturing method therefor |
| US20050019199A1 (en) * | 2003-07-03 | 2005-01-27 | Agency For Science, Technology And Research | Double-layer metal sheet and method of fabricating the same |
| CN101818277A (en) * | 2010-01-29 | 2010-09-01 | 华南理工大学 | Method for preparing super-elastic gradient-porosity porous NiTi alloy |
| CN102597625A (en) * | 2009-08-18 | 2012-07-18 | 山特维克知识产权股份有限公司 | Radiation burner |
| CN102966990A (en) * | 2011-12-01 | 2013-03-13 | 周佳强 | Metal honeycomb heating element with double-layer different purpose function and for gas cookers and gas equipment burners |
| CN104075327A (en) * | 2014-07-15 | 2014-10-01 | 李芳春 | Variable fire hole formed by butt joint of small-diameter duct and large-diameter duct |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0450897A2 (en) * | 1990-04-03 | 1991-10-09 | Ngk Insulators, Ltd. | Heat-resistant metal monolith and manufacturing method therefor |
| US20050019199A1 (en) * | 2003-07-03 | 2005-01-27 | Agency For Science, Technology And Research | Double-layer metal sheet and method of fabricating the same |
| CN102597625A (en) * | 2009-08-18 | 2012-07-18 | 山特维克知识产权股份有限公司 | Radiation burner |
| CN101818277A (en) * | 2010-01-29 | 2010-09-01 | 华南理工大学 | Method for preparing super-elastic gradient-porosity porous NiTi alloy |
| CN102966990A (en) * | 2011-12-01 | 2013-03-13 | 周佳强 | Metal honeycomb heating element with double-layer different purpose function and for gas cookers and gas equipment burners |
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