CN212645311U - Samarium cobalt permanent magnet material vacuum sintering stove - Google Patents
Samarium cobalt permanent magnet material vacuum sintering stove Download PDFInfo
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- CN212645311U CN212645311U CN202020772450.3U CN202020772450U CN212645311U CN 212645311 U CN212645311 U CN 212645311U CN 202020772450 U CN202020772450 U CN 202020772450U CN 212645311 U CN212645311 U CN 212645311U
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Abstract
The utility model discloses a samarium cobalt permanent-magnet material vacuum sintering stove, when needing to the cavity internal heating that the heat preservation encloses, the fresh air inlet is sheltered from to first occlusion part, and the second occlusion part shelters from the exhaust vent, then utilizes the multizone heater to each regional simultaneous heating in the cavity, improves the homogeneity of heating to improve samarium cobalt permanent-magnet material's uniformity. When cooling in the cavity that the heat preservation encloses, the fresh air inlet is dodged to first shielding part, and the exhaust vent is dodged to the second shielding part, then utilize aerating device to dash into inert gas in to the cavity, recycle outer circulative cooling device and blow the fresh air inlet to the heat preservation by outer circulative cooling system's air outlet with cooling inert gas, discharge from the exhaust vent of heat preservation, flow to outer circulative cooling device's return air inlet through the air runner, by outer circulative cooling system cooling, realized producing circulating cooling gas and cooled down samarium cobalt permanent-magnet material, thereby improve the cooling rate, and then improve samarium cobalt permanent-magnet material's performance and uniformity.
Description
Technical Field
The utility model relates to a production facility of samarium cobalt permanent-magnet material, in particular to samarium cobalt permanent-magnet material vacuum sintering stove.
Background
Samarium cobalt permanent magnet material is the second generation rare earth permanent magnet, has the advantage of high magnetic property and good temperature performance, and the maximum working temperature can reach 250-. Compared with neodymium iron boron magnet, samarium cobalt magnet is more suitable for working in high temperature environment, therefore, widely used for manufacturing various high-performance permanent magnet motors and fields such as aerospace, national defense and military industry, etc.
Firing of samarium cobalt permanent magnet materials requires higher temperatures, faster cooling and better temperature uniformity to achieve product performance and consistency. The temperature uniformity and the cooling speed of the existing vacuum sintering equipment are poor, and the sintering of the high-performance samarium cobalt magnet is difficult to realize.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a samarium cobalt permanent-magnet material vacuum sintering stove to it is relatively poor to solve current vacuum sintering equipment cooling rate, hardly realizes the problem of the sintering of high performance samarium cobalt magnet.
According to an embodiment of the utility model, a samarium cobalt permanent magnet material vacuum sintering furnace is provided, which comprises a furnace body, a vacuumizing device, an aerating device and an external circulation cooling device;
the furnace body is respectively communicated with the air charging device, the vacuumizing device and the external circulating cooling device;
a cavity surrounded by a heat-insulating layer is arranged in the furnace body, and a gap is arranged between the heat-insulating layer and the inner wall of the furnace body to form a gas flow passage; a multi-zone heater is arranged in the cavity;
the air return opening of the external circulation cooling device is communicated with the top of the furnace body, an air inlet hole is formed in the part, opposite to the air outlet of the external circulation cooling device, of the heat insulation layer, and an air outlet hole is formed in the side, opposite to the air inlet hole, of the heat insulation layer; the air inlet is provided with a first shielding part which can shield or avoid the air inlet, and the air outlet is provided with a second shielding part which can shield or avoid the air outlet;
when the cavity is heated by the multi-zone heater, the first shielding part shields the air inlet hole, and the second shielding part shields the air outlet hole;
when the outer circulation cooling device and the air charging device are used for cooling in the cavity, the first shielding part avoids the air inlet hole, and the second shielding part avoids the air outlet hole.
Specifically, the first shielding part is connected with the inner wall of the furnace body through a first transmission device, and the first shielding part can longitudinally move to a closing position for shielding the air inlet hole or an opening position for avoiding the air inlet hole through the first transmission device.
Specifically, the second shielding part passes through second transmission with the inner wall connection of furnace body, the second shielding part can pass through second transmission lateral motion extremely shelters from the closed position of exhaust vent or dodge the open position of exhaust vent.
Specifically, the first transmission device and the second transmission device are hydraulic cylinders.
Specifically, the multi-zone heater comprises a plurality of heating parts, and the plurality of heating parts are uniformly distributed in the cavity so as to divide the cavity into a plurality of heating zones.
Specifically, the samarium cobalt permanent magnet material vacuum sintering furnace is further provided with a temperature measurement control device, and the temperature measurement control device is connected with the multi-zone heater;
when the multi-zone heater is used for heating the cavity, the temperature measurement control device is used for monitoring the real-time temperature in the cavity and controlling the heating power of the multi-zone heater according to the temperature so as to enable the temperature to be within a preset temperature range.
Specifically, the temperature measurement control device is fixed on the furnace body, and a temperature measurement part of the temperature measurement control device extends into the cavity.
Specifically, the first shielding portion and the second shielding portion are heat insulation plates.
Specifically, the maximum inflation pressure value of the inflator is 0.18MPa · abs.
The embodiment of the utility model provides a samarium cobalt permanent-magnet material vacuum sintering stove, when needing to the cavity internal heating that the heat preservation encloses, the fresh air inlet is sheltered from to first occlusion part, and the second occlusion part shelters from the exhaust vent, then utilizes the multizone heater to each regional concurrent heating in the cavity, improves the homogeneity of heating to improve samarium cobalt permanent-magnet material's uniformity. When cooling in the cavity that the heat preservation encloses, the fresh air inlet is dodged to first shielding part, and the exhaust vent is dodged to the second shielding part, then utilize aerating device to dash into inert gas in to the cavity, recycle outer circulative cooling device will cool off inert gas and blow to the fresh air inlet of heat preservation by outer circulative cooling system's air outlet, and carry out the heat exchange with samarium cobalt permanent-magnet material in getting into the cavity, the inert gas that the temperature rose is discharged from the exhaust vent of heat preservation, flow to outer circulative cooling device's return air inlet through the air runner, by outer circulative cooling system cooling, realized producing circulating cooling gas and cooled down samarium cobalt permanent-magnet material, thereby improve cooling speed, and then improve samarium cobalt permanent-magnet material's performance and uniformity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a structural diagram of a vacuum sintering furnace for samarium cobalt permanent magnet material according to an embodiment of the present invention;
figure 2 is the embodiment of the utility model provides a section view of samarium cobalt permanent magnet material vacuum sintering stove.
The device comprises a furnace body 1, a multi-zone heater 2, a heat insulation layer 3, a first shielding part 4, a second shielding part 5, a vacuumizing device 6, an air charging device 7, a temperature measurement control device 8, an external circulation cooling device 9, an air outlet 91 and an air return port 92.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
According to an embodiment of the present invention, as shown in fig. 1 and 2, there is provided a samarium cobalt permanent magnet vacuum sintering furnace, comprising a furnace body 1, a vacuum extractor 6, an inflator 7 and an external circulation cooling device 9; the furnace body 1 is respectively communicated with an air charging device 7, a vacuum pumping device 6 and an external circulating cooling device 9; a cavity surrounded by a heat-insulating layer 3 is arranged in the furnace body 1, and a gap is arranged between the heat-insulating layer 3 and the inner wall of the furnace body 1 to form a gas flow passage; a multi-zone heater 2 is arranged in the cavity; an air return opening 92 of the external circulation cooling device 9 is communicated with the top of the furnace body 1, an air inlet hole is formed in the part, opposite to an air outlet 91 of the external circulation cooling device 9, of the heat insulation layer 3, and an air outlet hole is formed in the side, opposite to the air inlet hole, of the heat insulation layer 3; a first shielding part 4 capable of shielding or avoiding the air inlet is arranged at the air inlet, and a second shielding part 5 capable of shielding or avoiding the air outlet 91 is arranged at the air outlet; when the cavity is heated by the multi-zone heater 2, the first shielding part 4 shields the air inlet, and the second shielding part 5 shields the air outlet; when the cavity is cooled by the external circulation cooling device 9 and the air charging device 7, the first shielding part 4 avoids the air inlet hole, and the second shielding part 5 avoids the air outlet hole.
The first shielding part 4 and the second shielding part 5 are in shielding and shielding actions through a transmission device, specifically, the first shielding part 4 is connected with the inner wall of the furnace body 1 through the first transmission device, and the first shielding part 4 can longitudinally move to a closing position for shielding the air inlet hole or an opening position for shielding the air inlet hole through the first transmission device. The second shielding part 5 is connected with the inner wall of the furnace body 1 through a second transmission device, and the second shielding part 5 can transversely move to a closing position for shielding the air outlet or an opening position for avoiding the air outlet through the second transmission device. The first shielding part 4 is moved longitudinally by the first transmission device, so that when the first shielding part moves to the opening position, the air outlet 91 of the micro-circulation cooling device is prevented from being shielded, and cold air output by the air outlet 91 of the micro-circulation cooling device can smoothly enter the cavity; similarly, the second transmission device is used for moving the first shielding part 4 to the opening position along the transverse direction, so that the cold air after heat exchange is prevented from blocking the air return opening 92 of the micro-circulation cooling device, and the cold air after heat exchange can smoothly flow to the air return opening 92 of the micro-circulation cooling device. Wherein, first transmission and second transmission are the pneumatic cylinder.
Further, first occlusion part 4 and second occlusion part 5 are the heated board, shelter from the fresh air inlet at first occlusion part 4 like this, and under the condition that second occlusion part 5 sheltered from the exhaust vent, it is thermal-insulated to keep warm to the intracavity with heat preservation 3 jointly, reduce the temperature loss in the cavity, improve the heating effect.
The maximum inflation pressure value of the inflator 7 was 0.18MPa · abs. The heat preservation layer 3 can be made of the existing heat preservation material, and specifically, the heat preservation layer can be composed of a molybdenum sheet inner shell, heat preservation cotton filled in the middle and a stainless steel outer shell. Be equipped with the clearance between the inner wall of heat preservation 3 and furnace body 1, the fresh air inlet of heat preservation 3 is just to extrinsic cycle cooling device 9's air outlet 91, and be equipped with the exhaust vent in the heat preservation 3 relative one end with air outlet 91, thus, when cooling in the cavity, the cold air of output by extrinsic cycle cooling device 9's air outlet 91, there is not any barrier, directly get into to carry out the heat exchange in the cavity that heat preservation 3 enclosed by heat preservation 3's fresh air inlet, greatly reduced the dwell time of cold air outside heat preservation 3, guaranteed that the cold air that gets into in the cavity has the temperature that is enough low, thereby the efficiency of cooling has been improved. And after the cold air flows into the gap between the heat preservation layer 3 and the inner wall of the furnace body 1 through the air outlet hole of the heat preservation layer 3, the cold air after heat exchange rises in temperature, moves upwards in the gap, flows along the gap to the air return opening 92 of the external circulation cooling device 9 communicated with the top of the furnace body 1, and is refrigerated through the external circulation cooling device, so that the heated cold air can directly flow to the air return opening 92 of the external circulation cooling device along the gap by utilizing the characteristic that the cold air after heat exchange rises, an internal gas flow circulating device does not need to be added, the structure of the sintering furnace is simplified, and the flow rate of the gas is ensured.
In this embodiment, when this fritting furnace heating, utilize evacuating device 6 to take out required vacuum to 1 inside with the furnace body, shelter from the fresh air inlet with first occlusion part 4, and second occlusion part 5 shelters from the exhaust vent, then utilize multi-zone heater 2 to each regional simultaneous heating in the cavity, improve the homogeneity of heating to improve samarium cobalt permanent magnet material's uniformity. When cooling in the cavity that the heat preservation 3 encloses, the fresh air inlet is dodged to first shielding part 4, and the exhaust vent is dodged to second shielding part 5, then utilize aerating device 7 to dash into inert gas in the cavity, recycle outer circulative cooling device 9 will cool off inert gas and blow to the fresh air inlet of heat preservation 3 by outer circulative cooling system's air outlet 91, and go into the cavity and carry out the heat exchange with samarium cobalt permanent-magnet material, the inert gas that the temperature rose discharges from the exhaust vent of heat preservation 3, flow to outer circulative cooling device 9's return air inlet 92 through the air runner, by outer circulative cooling system cooling, realized producing circulating cooling gas and cooled down samarium cobalt permanent-magnet material, thereby improve the cooling rate, and then improve samarium cobalt permanent-magnet material's performance and uniformity.
In the above embodiment, as shown in fig. 2, the multi-zone heater 2 includes a plurality of heating portions, and the plurality of heating portions are uniformly arranged in the cavity to divide the cavity into a plurality of heating areas. The multi-zone heater 2 can be a graphite heater, and the graphite has high heat generation capacity, strong heat resistance, small thermal expansion, uniform heat transfer and long service life. And the multi-zone heater 2 can be used for heating all parts in the cavity at the same time, so that the synchronous rise of the temperature of all parts in the cavity is ensured, and the temperature difference of all parts in the cavity is avoided.
In the above embodiment, as shown in fig. 2, the samarium cobalt permanent magnet vacuum sintering furnace further comprises a temperature measurement control device 8, and the temperature measurement control device 8 is connected with the multi-zone heater 2; when the multi-zone heater 2 is used for heating the cavity, the temperature measurement control device 8 is used for monitoring the real-time temperature in the cavity and controlling the heating power of the multi-zone heater 2 according to the temperature so as to enable the temperature to be within a preset temperature range.
Wherein, temperature measurement controlling means 8 is fixed on furnace body 1, and temperature measurement portion of temperature measurement controlling means 8 stretches into to the cavity in, and temperature measurement portion can be temperature sensor, also can adopt other temperature measurement parts certainly, and this embodiment does not do the strict limitation. The temperature measurement control device 8 is used for adjusting the heating power of the multi-zone heater 2 so as to ensure that the temperature uniformity in the effective heating zone is within +/-3 ℃.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims (9)
1. A samarium cobalt permanent magnet material vacuum sintering furnace is characterized by comprising a furnace body (1), a vacuumizing device (6), an aerating device (7) and a microcirculation cooling device (9);
the furnace body (1) is respectively communicated with the air charging device (7), the vacuumizing device (6) and the micro-circulation cooling device (9);
a cavity surrounded by a heat-insulating layer (3) is arranged in the furnace body (1), and a gap is arranged between the heat-insulating layer (3) and the inner wall of the furnace body (1) to form a gas flow channel; a multi-zone heater (2) is arranged in the cavity;
an air return opening (92) of the micro-circulation cooling device (9) is communicated with the top of the furnace body (1), an air inlet hole is formed in the part, opposite to an air outlet (91) of the micro-circulation cooling device (9), of the heat insulation layer (3), and an air outlet hole is formed in the side, opposite to the air inlet hole, of the heat insulation layer (3); a first shielding part (4) capable of shielding or avoiding the air inlet hole is arranged at the air inlet hole, and a second shielding part (5) capable of shielding or avoiding the air outlet (91) is arranged at the air outlet hole;
when the cavity is heated by the multi-zone heater (2), the first shielding part (4) shields the air inlet hole, and the second shielding part (5) shields the air outlet hole;
when the microcirculation cooling device (9) and the air charging device (7) are used for cooling in the cavity, the first shielding part (4) avoids the air inlet hole, and the second shielding part (5) avoids the air outlet hole.
2. The samarium cobalt permanent magnet material vacuum sintering furnace of claim 1, characterized in that the first screen (4) is connected to the inner wall of the furnace body (1) by a first transmission, the first screen (4) being movable longitudinally by the first transmission to a closed position to screen the air inlet openings or to an open position to clear the air inlet openings.
3. The samarium cobalt permanent magnet material vacuum sintering furnace of claim 2, characterized in that the second shielding (5) is connected to the inner wall of the furnace body (1) by a second transmission, the second shielding (5) being capable of moving laterally by the second transmission to a closed position shielding the air outlet or to an open position avoiding the air outlet.
4. The vacuum sintering furnace of samarium cobalt permanent magnet material of claim 3 wherein the first and second actuators are hydraulic cylinders.
5. A furnace as claimed in claim 1 in which the multi-zone heater (2) comprises a plurality of heating sections arranged evenly within the chamber to divide the chamber into a plurality of heating zones.
6. The vacuum sintering furnace of samarium cobalt permanent magnet material according to claim 1 further comprising a temperature control device (8), the temperature control device (8) being connected to the multi-zone heater (2);
when the cavity is heated by the multi-zone heater (2), the temperature measurement control device (8) is used for monitoring the real-time temperature in the cavity and controlling the heating power of the multi-zone heater (2) according to the temperature so as to enable the temperature to be within a preset temperature range.
7. The vacuum sintering furnace of samarium cobalt permanent magnet material of claim 6 wherein the temperature measurement control device (8) is fixed to the furnace body (1) and the temperature measurement portion of the temperature measurement control device (8) extends into the cavity.
8. The furnace of claim 1 in which the first and second shades (4, 5) are heat retaining panels.
9. A furnace according to claim 1 in which the maximum inflation pressure value of the inflator (7) is 0.18MPa abs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020772450.3U CN212645311U (en) | 2020-05-11 | 2020-05-11 | Samarium cobalt permanent magnet material vacuum sintering stove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020772450.3U CN212645311U (en) | 2020-05-11 | 2020-05-11 | Samarium cobalt permanent magnet material vacuum sintering stove |
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| Publication Number | Publication Date |
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| CN212645311U true CN212645311U (en) | 2021-03-02 |
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| CN202020772450.3U Active CN212645311U (en) | 2020-05-11 | 2020-05-11 | Samarium cobalt permanent magnet material vacuum sintering stove |
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Address after: 110172 No. 599 Tongcheng Road, Shenfu demonstration zone, Shenyang, Liaoning Patentee after: Shenyang Guangtai Vacuum Technology Co.,Ltd. Address before: No. 599, Tongcheng Road, Shenfu New District, Shenyang City, Liaoning Province Patentee before: SHENYANG GUANGTAI VACUUM TECHNOLOGY Co.,Ltd. |