CN104785787A - Powder metallurgy rapid cooling system - Google Patents
Powder metallurgy rapid cooling system Download PDFInfo
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- CN104785787A CN104785787A CN201510209069.XA CN201510209069A CN104785787A CN 104785787 A CN104785787 A CN 104785787A CN 201510209069 A CN201510209069 A CN 201510209069A CN 104785787 A CN104785787 A CN 104785787A
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Abstract
The invention provides a powder metallurgy rapid cooling system. The powder metallurgy rapid cooling system comprises a rapid cooling segment and a balance segment; the rapid cooling segment comprises a rapid cooling circulating air cavity, a frequency conversion axial flow fan A, a cooling coil, a cooling water sleeve and a net belt, wherein the rapid cooling circulating air cavity comprises an airflow cooling room, an airflow buffering area, an airflow guiding area and a side circulating channel which are mutually communicated with one another, the frequency conversion axial flow fan A is fixedly connected to the upper end of a wall body of the rapid cooling circulating air cavity in a sealing mode, the cooling coil is connected to the outer wall of the airflow cooling room in a coiling mode, the cooling water sleeve is fixedly connected to the bottom end of the wall body of the rapid cooling circulating air cavity and extends towards the two sides, the net belt is used for containing products and penetrates through the rapid cooling circulating air cavity, the upper surface of the net belt corresponds to the position of the airflow guiding area, and the lower surface of the net belt corresponds to the cooling water sleeve; the balance segment comprises a balance segment inner cavity, the upper end of the wall body is fixedly connected with at least two frequency conversion axial flow fans B in a sealing mode, and the bottom end of a wall body of balance segment is connected with the cooling water sleeve. The powder metallurgy rapid cooling system has the advantages that the rapid cooling efficiency is high, a mode combining water cooling with air cooling is adopted for guaranteeing the balance of the upper cooling speed and lower cooling speed, meanwhile, the balance segment is additionally arranged to guarantee the balance of air in a furnace, and the air inverse suction can not be caused.
Description
Technical field
The present invention relates to a kind of accelerate cooling system, especially a kind of for the accelerate cooling system in powder metallurgy.
Background technology
Powder metallurgy sintered hardening technique starts from the nineties in 20th century, and to be powdered metal parts enter microscopic structure in cooling section process at sintering is partly or entirely transformed into the technical process of martensitic structure.This technical process eliminates the independent together quenching technical after sintering, has energy-and time-economizing, efficiently technological merit.Powder metallurgy accelerate cooling system is exactly the powder metallurgy sintering furnace accessory system developed for this technology.
Powder metallurgy sintered sclerosis is exactly to have the sintered metal product of suitable alloying component from sintering temperature, cooled rapidly by accelerate cooling system effect, austenite carries out the lattice transformation of non-diffusing type, namely austenitic face-centred cubic structure can be transformed into suddenly carbon atom and " freezes " supersaturated solid solution in martensitic body-centered cubic structure, thus make distortion of lattice, form martensite.Powder metallurgy net belt type sintering furnace is the continuous equipment of sintering cooling integrated, needs to increase accelerate cooling system behind high temperature sintering district, at a proper temperature, meet the technological requirement of product with suitable cooling velocity according to technological requirement.
The protective atmosphere of heat in cooling section is extracted out from bottom by a high-speed centrifugal fan by original accelerate cooling system, after heat exchanger cooling, is blown into by protective atmosphere, carries out product surface and cool rapidly, reach effect of hardening by cooling section top.But there is Railway Project in this system:
1, inlet and outlet is for lead directly to up and down, and under the high-frequency operating state of centrifugal blower, because gas flow at high rates easily produces negative pressure in cooling section, cause air directly to suck in stove from stove tail, causing product surface to be oxidized affects product quality.General processing mode reduces blower fan frequency, ensure that air can not enter in stove due to negative pressure, but after reducing blower fan frequency, product cooling velocity also can be affected, and does not reach technological requirement.
2, powder metallurgy sintering furnace is driven by guipure, and product is placed on belt surface.Under original fast cooling system effect, product upper surface is because cold wind hardens rapidly, and lower surface is not taken away in time due to the heat of guipure, and after having caused fast cold-zone, the bounce-back of guipure heat produces drawing effect, reduces product surface hardness.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of quick cooling effectiveness high, and adopt water-cooled to ensure that upper and lower cooling velocity balances in conjunction with air-cooled form, increase balancing segment simultaneously and ensure furnace air balance, a kind of powder metallurgy accelerate cooling system of air suck-back can not be caused.
Technical solution of the present invention is: a kind of powder metallurgy accelerate cooling system, and it is provided with a rapid cooling section between the body of heater thermal treatment zone and body water-cooling district, and is provided with a balancing segment between described rapid cooling Duan Yulu tail, and described rapid cooling section comprises,
Rapid cooling section circulated air chamber, it from top to bottom comprises the air-flow cooling chamber of mutual conduction vertically successively, air-flow buffer district, air flow guiding district, and is communicated with the air-flow side circulation canal of air flow guiding district and air-flow cooling chamber;
Frequency conversion axial flow fan A, its fixed seal connection is in the wall body upper end in described rapid cooling section circulated air chamber, and its fan blade A is positioned at described air-flow cooling chamber;
Cooling coil, its coiling is connected to described air-flow cooling chamber outer wall, and its side is provided with cooling coil entery and delivery port;
Cooling jacket, it is fixedly connected on the wall body bottom in described rapid cooling section circulated air chamber, and extends to both sides, and its side is provided with water jacket entery and delivery port;
Guipure for placing product interts through described rapid cooling section circulated air chamber, and is positioned at the bottom of inside, described rapid cooling section circulated air chamber, and this guipure upper surface is corresponding with described air flow guiding zone position, and this guipure lower surface is corresponding with described cooling jacket;
Described balancing segment comprises balancing segment inner chamber; The wall body upper end fixed seal connection of this balancing segment inner chamber has at least two frequency conversion axial flow fan B, and its fan blade B is positioned at this balancing segment inner chamber; The wall body bottom of this balancing segment inner chamber is connected with the described cooling jacket extended to both sides.
Preferably, above-mentioned a kind of powder metallurgy accelerate cooling system, wherein said air flow guiding district comprises some deflectors that is arranged at flow jeting port place, and this flow jeting port is corresponding with the product that guipure is placed.
Preferably, above-mentioned a kind of powder metallurgy accelerate cooling system, wherein said water jacket water inlet is arranged at the relative both sides of described cooling jacket, and with cooling jacket in form the current of spiral flow.
Preferably, above-mentioned a kind of powder metallurgy accelerate cooling system, wherein said water jacket water inlet is arranged at the side of described cooling jacket, is provided with spiral water flow passage in this cooling jacket.
Preferably, above-mentioned a kind of powder metallurgy accelerate cooling system, wherein said cooling coil is Copper & Aluminum Fin.
Preferably, above-mentioned a kind of powder metallurgy accelerate cooling system, wherein said frequency conversion axial flow fan B is 2, and it interacts and form a cross-ventilation district between these two frequency conversion axial flow fan B.
Technique effect of the present invention is mainly reflected in the following aspects:
(1) in the present invention, the upper surface of guipure is corresponding with air flow guiding zone position, the lower surface of guipure is corresponding with cooling jacket, protective atmosphere is blown down by axial flow blower by the top of the product that guipure is placed from top to bottom, after being cooled by cooling coil, blow to surface of the work to cool fast workpiece, the lower surface of guipure takes away the heat of guipure in time by cooling jacket simultaneously, namely have employed the air-cooled form in conjunction with water-cooled and ensure that the upper and lower cooling velocity balance of product workpiece, upper and lower two surfaces of product can not be caused to there is difference of hardness; In addition, under guarantee cooling velocity can reach optimum efficiency situation, a balancing segment is had additional between rapid cooling Duan Yulu tail, balancing segment is that at least two blower fans interact, between adjacent two blower fans, form a cross-ventilation district, by regulating the speed of two blower fans, the draught head controlling two reaches the effect controlling air-flow trend, air suck-back can not be caused, product will be caused to be oxidized because rear air enters.
(2) current in the cooling jacket in the present invention flow in a spiral form, ensure that the uniformity of water temperature, in addition, adopt Copper & Aluminum Fin as heat radiation original paper in the present invention, better relative to traditional stainless steel finned tube radiating effect.
Accompanying drawing explanation
Fig. 1: rapid cooling segment structure schematic diagram of the present invention;
Fig. 2: Figure 1A-A of the present invention is to sectional view;
Fig. 3: cooling jacket feed water flow of the present invention is to schematic diagram;
Fig. 4: balancing segment structure schematic diagram of the present invention;
Fig. 5: balancing segment structure side view of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail, is easier to make technical solution of the present invention understand and grasp.
As shown in FIG. 1 to 3, a kind of powder metallurgy accelerate cooling system, it is provided with a rapid cooling section between the body of heater thermal treatment zone and body water-cooling district, and is provided with a balancing segment between described rapid cooling Duan Yulu tail, and described rapid cooling section comprises,
Rapid cooling section circulated air chamber 1, it from top to bottom comprises the air-flow cooling chamber 10 of mutual conduction vertically successively, air-flow buffer district 11, air flow guiding district 12, and is communicated with the air-flow side circulation canal 13 of air flow guiding district 12 and air-flow cooling chamber 10;
Frequency conversion axial flow fan A2, its fixed seal connection is in the wall body upper end in rapid cooling section circulated air chamber 1, and its fan blade A3 is positioned at air-flow cooling chamber 10;
Cooling coil 4, its coiling is connected to air-flow cooling chamber 10 outer wall, and its side is provided with cooling coil entery and delivery port (40,41);
Cooling jacket 5, it is fixedly connected on the wall body bottom in rapid cooling section circulated air chamber 1, and extends to both sides, and its side is provided with water jacket entery and delivery port;
Guipure 6 for placing product 7 interts through rapid cooling section circulated air chamber 1, and is positioned at the bottom of inside, rapid cooling section circulated air chamber 1, and this guipure 6 upper surface is corresponding with position, air flow guiding district 12, and this guipure 6 lower surface is corresponding with cooling jacket 5;
As shown in Figure 4 and Figure 5, balancing segment comprises balancing segment inner chamber 9; The wall body upper end fixed seal connection of this balancing segment inner chamber 9 has at least two frequency conversion axial flow fan B8, and its fan blade B10 is positioned at this balancing segment inner chamber 9; The wall body bottom of this balancing segment inner chamber 9 is connected with the described cooling jacket 5 extended to both sides.
Air flow guiding district 12 comprises some deflectors that is arranged at flow jeting port place, and this flow jeting port is corresponding with the product that guipure is placed.
As shown in Figure 3, water jacket water inlet (50,51) is arranged at the relative both sides of described cooling jacket, and the current that form spiral flow interior with cooling jacket 5.Certainly can also adopt its version, make the current forming spiral flow in cooling jacket 5, as: the side of cooling jacket as described in water jacket water inlet is arranged at, is provided with spiral water flow passage in this cooling jacket 5.
Cooling coil 4 is Copper & Aluminum Fin.
As shown in Figure 4, frequency conversion axial flow fan B8 is 2, and it interacts and form a cross-ventilation district M between these two frequency conversion axial flow fan B.
In this technical scheme, the upper surface of guipure is corresponding with air flow guiding zone position, the lower surface of guipure is corresponding with cooling jacket, protective atmosphere is blown down by axial flow blower by the top of the product that guipure is placed from top to bottom, after being cooled by cooling coil, blow to surface of the work to cool fast workpiece, the lower surface of guipure takes away the heat of guipure in time by cooling jacket simultaneously, namely have employed the air-cooled form in conjunction with water-cooled and ensure that the upper and lower cooling velocity balance of product workpiece, upper and lower two surfaces of product can not be caused to there is difference of hardness; In addition, under guarantee cooling velocity can reach optimum efficiency situation, a balancing segment is had additional between rapid cooling Duan Yulu tail, balancing segment is that at least two blower fans interact, between adjacent two blower fans, form a cross-ventilation district, by regulating the speed of two blower fans, the draught head controlling two reaches the effect controlling air-flow trend, air suck-back can not be caused, product will be caused to be oxidized because rear air enters.
Current in addition in cooling jacket flow in a spiral form, ensure that the uniformity of water temperature, in addition, adopt Copper & Aluminum Fin as heat radiation original paper in the present invention, better relative to traditional stainless steel finned tube radiating effect.
By describing above and can finding out, the quick cooling effectiveness of this technical scheme is high, and adopts water-cooled to ensure that upper and lower cooling velocity balances in conjunction with air-cooled form, increases balancing segment simultaneously and ensures furnace air balance, can not cause air suck-back phenomenon.
Above technical solution of the present invention is described in detail; cited is only typical exemplary applications, it is to be understood that, by the combination of same or similar technical characteristic and replacement; can form multiple specific embodiments, these schemes all drop within protection scope of the present invention.
Claims (6)
1. a powder metallurgy accelerate cooling system, is characterized in that, is provided with a rapid cooling section between the body of heater thermal treatment zone and body water-cooling district, and is provided with a balancing segment between described rapid cooling Duan Yulu tail, and described rapid cooling section comprises,
Rapid cooling section circulated air chamber, it from top to bottom comprises the air-flow cooling chamber of mutual conduction vertically successively, air-flow buffer district, air flow guiding district, and is communicated with the air-flow side circulation canal of air flow guiding district and air-flow cooling chamber;
Frequency conversion axial flow fan A, its fixed seal connection is in the wall body upper end in described rapid cooling section circulated air chamber, and its fan blade A is positioned at described air-flow cooling chamber;
Cooling coil, its coiling is connected to described air-flow cooling chamber outer wall, and its side is provided with cooling coil entery and delivery port;
Cooling jacket, it is fixedly connected on the wall body bottom in described rapid cooling section circulated air chamber, and extends to both sides, and its side is provided with water jacket entery and delivery port;
Guipure for placing product interts through described rapid cooling section circulated air chamber, and is positioned at the bottom of inside, described rapid cooling section circulated air chamber, and this guipure upper surface is corresponding with described air flow guiding zone position, and this guipure lower surface is corresponding with described cooling jacket;
Described balancing segment comprises balancing segment inner chamber; The wall body upper end fixed seal connection of this balancing segment inner chamber has at least two frequency conversion axial flow fan B, and its fan blade B is positioned at this balancing segment inner chamber; The wall body bottom of this balancing segment inner chamber is connected with the described cooling jacket extended to both sides.
2. a kind of powder metallurgy accelerate cooling system according to claim 1, is characterized in that, described air flow guiding district comprises some deflectors that is arranged at flow jeting port place, and this flow jeting port is corresponding with the product that guipure is placed.
3. a kind of powder metallurgy accelerate cooling system according to claim 1, is characterized in that, described water jacket water inlet is arranged at the relative both sides of described cooling jacket, and with cooling jacket in form the current of spiral flow.
4. a kind of powder metallurgy accelerate cooling system according to claim 1, it is characterized in that, described water jacket water inlet is arranged at the side of described cooling jacket, is provided with spiral water flow passage in this cooling jacket.
5. a kind of powder metallurgy accelerate cooling system according to Claims 1-4 any one, is characterized in that, described cooling coil is Copper & Aluminum Fin.
6. a kind of powder metallurgy accelerate cooling system according to Claims 1-4 any one, is characterized in that, described frequency conversion axial flow fan B is 2, and it interacts and form a cross-ventilation district between these two frequency conversion axial flow fan B.
Priority Applications (1)
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| CN201510209069.XA CN104785787A (en) | 2015-04-29 | 2015-04-29 | Powder metallurgy rapid cooling system |
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| CN201510209069.XA CN104785787A (en) | 2015-04-29 | 2015-04-29 | Powder metallurgy rapid cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109880984A (en) * | 2019-03-04 | 2019-06-14 | 山西中电科新能源技术有限公司 | Variable volume cooling device |
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| JPH02205623A (en) * | 1989-02-03 | 1990-08-15 | Daido Steel Co Ltd | Cooling method for material to be treated in vacuum furnace and vacuum furnace |
| JPH08127813A (en) * | 1994-09-07 | 1996-05-21 | Nippon Steel Corp | Material for member for supporting material to be heated in heating furnace |
| CN101121998A (en) * | 2007-09-14 | 2008-02-13 | 苏州工业园区华福科技有限公司 | Copper pipe roller bottom type continuous bright annealing furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109880984A (en) * | 2019-03-04 | 2019-06-14 | 山西中电科新能源技术有限公司 | Variable volume cooling device |
| CN109880984B (en) * | 2019-03-04 | 2023-06-09 | 山西中电科新能源技术有限公司 | Variable volume cooling device |
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