CN1095612C - Planar DC electromgnetic pump for casting of Al-alloy - Google Patents
Planar DC electromgnetic pump for casting of Al-alloy Download PDFInfo
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- CN1095612C CN1095612C CN99121476A CN99121476A CN1095612C CN 1095612 C CN1095612 C CN 1095612C CN 99121476 A CN99121476 A CN 99121476A CN 99121476 A CN99121476 A CN 99121476A CN 1095612 C CN1095612 C CN 1095612C
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- electromagnet
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Abstract
The present invention relates to a planar direct current electromagnetic pump for casting Al-alloy, which comprises a pump body, a connecting pipe, a liquid lift pipe, electrodes and an electromagnet, wherein the pump body is arranged at one side of a thermal insulation furnace crucible; the electrodes are arranged at both ends of a flow tank of the pump body; two poles of the electromagnet are respectively arranged at both sides of the flow tank of the pump body. Aluminium liquid flows in the flow tank of the pump body by the connecting pipe, and the aluminium liquid enters a die casting mold by the liquid lift pipe through the electromagnetic thrust force function. The electromagnetic pump has the advantages of small volume, high efficiency, low cost, etc. The present invention can automatically lift and conveying liquid aluminium alloy, and conveying flow quantity and pressure are continuous, accurate and adjustable. The working process uses a full enclosed mode so that the further oxidation and the hydrogen suction of the aluminium liquid are prevented. The present invention meets the technological requirement and is one of key equipment producing a high quality aluminium alloy casting.
Description
The invention belongs to the pump class, be specifically related to a kind of planar DC electromgnetic pump for casting of Al-alloy.
Electromagnetic pump is a kind of device of carrying conductor fluid, at many industrial departments application is arranged all.The electromagnetic pump that is used for aluminium alloy casting at present mostly is an alternating-current electromagnetic pump, as the electromagnetic pump of introducing in " cold-chamber die casting machine novel melting metal delivery system " literary composition in " Special Processes of Metal Castings and non-ferrous alloy " magazine 1998 supplementary issue (total the 98th phase), and on October 11st, 1988 U.S.'s patent specification disclosed " molten metal electromagnetic pump ".It is simple that alternating-current electromagnetic pump has overall structure, do not need electrode member, so scheme is easy to implement.But because alternating-current electromagnetic pump adopts the alternate current operation mode, its electric current and magnetic flux density that produces electromagnetic push is difficult to accomplish same-phase, often has certain phase difference, and the part that only is in homophase could work to directional thrust.When electric current was identical with the magnetic flux density phase place, the two commutated simultaneously, did not influence the directed movement of conductor fluid; When there are phase difference in electric current and magnetic flux density, the two has only one to change direction mutually in a certain period, the action direction of electromagnetic force has just become in the other direction like this, and not only the directed movement of convection cell is inoperative, also has negative effect, therefore the alternating-current electromagnetic pump operating efficiency is generally very low, if reduce described phase difference, then can raise the efficiency greatly, but equipment investment is big by the frequency conversion mode, structure is huge in addition, uses inconvenient maintenance.
Direct-current electromagnetic pump is compared with alternating-current electromagnetic pump, its volume is less, high efficiency, but because the direct solenoid pump electrode directly contacts with molten metal, need to consider conductivity that electrode high-temperature oxidation resistance, the burn into of anti-the molten metal are high and to the influence of electromagnetic component magnetic gap magnetic field intensity etc., be difficult to carry out.Particularly molten aluminum liquid has stronger erosion to many electric conductors, so general direct-current electromagnetic pump shall not be applied to the higher temperatures working condition.
Purpose of the present invention is exactly at the deficiencies in the prior art, and a kind of simple in structure, reliable operation, the direct current planar electromagnetic pump that is applicable to the used in aluminium alloy casting under the higher temperatures working condition that efficient is high are provided.
General electromagnetic pump all with the supporting use of holding furnace, the difference of installation site can be divided into built-in, bottom type and side-mounted during according to use.The pump housing was submerged in the holding furnace crucible aluminium liquid when built-in electromagnetic pump was worked, though its compact conformation, but to pump housing material performance requirement height, and need certain cooling: bottom type and side-mounted electromagnetic pump are installed in the holding furnace outside, unlike the former height, this is useful for scheme implementation with reducing cost to material performance requirement.Bottom type electromagnetic pump aluminium liquid enters the pump housing from crucible bottom, and the slag or the foreign matter that are deposited on the bottom might be involved in the pump housing, easily causes pump housing damage and influences aluminium liquid quality.In view of above reason, the direct current planar electromagnetic pump of the present invention's design adopts side-mounted.
Planar DC electromgnetic pump for casting of Al-alloy comprises the pump housing, tube connector, stalk, electrode and electromagnet, the pump housing is arranged on holding furnace crucible one side, stalk vertically is arranged on pump housing top, pump housing inlet is tightly connected by tube connector and crucible wall liquid outlet, pump housing liquid outlet and stalk lower end are tightly connected, liquid metal flowing in the described electromagnetic pump; Electrode is installed in pump housing chute rear and front end, the electromagnet two cartridges pump housing chute left and right sides that is placed in, and the axis of electromagnet two cartridges is vertical with plane, electrode place, and electrode forms DC electric field in the pump housing, and electromagnet forms D.C. magnetic field in the pump housing; According to left hand rule, the liquid metal in the chute is subjected to Lorentz force upwards under the acting in conjunction of the DC electric field of certain orientation and D.C. magnetic field, liquid metal is upwards pumped along stalk.
Above-mentioned pump housing chute exit has flap, and this flap has changed the direction and the distribution of power line in the chute, can play and suppress the electric current cross flow, the effect that improves electromagnetic pump efficient.
Above-mentioned electromagnet is the split type annular opening DC electromagnet of the poly-magnetic pole head of band, and this electromagnet is handled its deciliter by a mechanical device, both can ensure the bigger magnetic flux density that the electromagnet magnetic gap is required, is convenient to pump body structure design and maintaining equipments again.
Further describe the present invention below in conjunction with accompanying drawing:
Fig. 1 is structure of the present invention and scheme of installation;
Fig. 2 be among Fig. 1 A-A to profile;
Fig. 3 is the fundamental diagram of direct current planar electromagnetic pump;
Fig. 4 is not for the pump housing groove structure schematic diagram of flap;
Fig. 5 is the pump housing groove structure schematic diagram of band flap.
As shown in Figure 1 and Figure 2, holding furnace is made up of crucible 2, bell 1.Direct current planar electromagnetic pump of the present invention is arranged on holding furnace one side, form by tube connector 5, the pump housing 7, stalk 11, electromagnet 9 and electrode 6,10, pump housing inner chamber chute 14 vertically is pancake, its inlet is tightly connected by tube connector 5 and holding furnace crucible wall liquid outlet, and liquid outlet and stalk 11 lower ends are tightly connected.Aluminium liquid enters pump housing chute 14 from crucible 2 sidewall liquid outlets through tube connector 5, is subjected to the effect of electromagnetic push to enter the low pressure casting casting mold or flow into compression mod through stalk 11 in chute.In order to make full use of aluminium liquid, the present invention is designed to the bottom of holding furnace crucible step-like, to reduce residual Al liquid as far as possible.The crucible liquid outlet is arranged on the position of crucible bottom certain altitude, and slag and the foreign matter that can avoid like this being deposited on crucible bottom are involved in the pump housing, influences aluminium liquid quality.Deposit and residual Al liquid can be discharged from crucible bottom one side relief port 13.
Figure 3 shows that the fundamental diagram of electromagnetic pump, be full of conductor fluid in the pump housing 7 chutes, when adding as shown in the figure DC electric field and magnetic field, will produce directed electromagnetic push on conductor fluid between magnetic gap, fluid will be under the effect of this power, directed moving.
In design, consider the problem that may occur cold shut on the passage that aluminium liquid flows through, the present invention is provided with heating collar 12 respectively on crucible 2, tube connector 5, stalk 11, and the stainless steel casing 3 that will place heat-insulating material 4 to fill except that other members electromagnet 9, the magnetizing coil 8.
The electromagnet 9 that the present invention adopts is split type open annular DC electromagnet of the poly-magnetic pole head of band, and two splits lump together during electromagnetic pump work, the magnetic gap minimum, and to obtain required magnetic flux density, two splits separately avoid the cartridge of electromagnet overheated when not working.For reducing the electromagnet shunt magnetic influence of member on every side, make near the member employing nonferromagnetic material of electromagnet.All members that contacts with aluminium liquid all adopt ceramic material as crucible, tube connector, the pump housing, electrode, stalk.Ceramic ramming mass or sealing-in of refractory fibre product ramming or compression seal are all adopted in connection between each ceramic component, prevent aluminium liquid seepage.
Fig. 4, Fig. 5 are pump housing groove structure schematic diagrames of the present invention, and wherein Fig. 4 is a pump housing groove structure schematic diagram of not being with flap, and Fig. 5 is the pump housing groove structure schematic diagram of band flap.Fig. 4 illustrates power line shape and the distribution in the aluminium liquid, power line is crooked and exceed the electromagnet field region at pump housing liquid outlet place in the chute, easily produce the cross flow loss, the electromagnetic push in knee produces the component opposite with liquid flow direction, can reduce due pressure head like this.Consider above-mentioned factor, the present invention has set up flap 15 in pump housing chute exit, has changed the direction and the distribution of power line in the chute, and as shown in Figure 5, power line is pulled back in the electromagnet the action of a magnetic field district, has reduced the cross flow loss.In addition, consistent in the horizontal component of the electromagnetic push in power line knee with aluminium liquid flow direction, help flowing of liquid.This structure has improved the operating efficiency of electromagnetic pump effectively.
Planar DC electromgnetic pump for casting of Al-alloy has compact conformation, volume is little, efficient is high, equipment is thrown The advantages such as money is few, the flow of delivering liquid metal and pressure continuously, accurately adjustable, can realize automatic lifting Rise and the delivering liquid aluminium alloy, the course of work adopts totally closed operation, and that can avoid or reduce aluminium liquid advances one Going on foot oxidation and inhale hydrogen, satisfy the manufacturing technique requirent of aluminium alloy castings, is to produce the high-quality aluminum alloy foundry goods One of key equipment.
Claims (5)
1, a kind of planar DC electromgnetic pump for casting of Al-alloy, comprise the pump housing, tube connector, stalk, it is characterized in that also comprising electrode and electromagnet, the pump housing is arranged on holding furnace crucible one side, stalk vertically is arranged on pump housing top, pump housing inlet is tightly connected by tube connector and crucible wall liquid outlet, and pump housing liquid outlet and stalk lower end are tightly connected, liquid metal flowing in the described electromagnetic pump; Electrode is installed in pump housing chute rear and front end, the electromagnet two cartridges pump housing chute left and right sides that is placed in, and the axis of electromagnet two cartridges is vertical with plane, electrode place, and electrode forms DC electric field in the pump housing, and electromagnet forms D.C. magnetic field in the pump housing; According to left hand rule, the liquid metal in the chute is subjected to Lorentz force upwards under the acting in conjunction of the DC electric field of certain orientation and D.C. magnetic field, liquid metal is upwards pumped along stalk.
2, planar DC electromgnetic pump for casting of Al-alloy according to claim 1 is characterized in that above-mentioned pump housing chute exit has flap.
3, planar DC electromgnetic pump for casting of Al-alloy according to claim 1 is characterized in that above-mentioned electromagnet is the split type annular opening DC electromagnet of the poly-magnetic pole head of band.
4, planar DC electromgnetic pump for casting of Al-alloy according to claim 1 is characterized in that above-mentioned tube connector, stalk are provided with heating collar.
5, planar DC electromgnetic pump for casting of Al-alloy according to claim 1, it is characterized in that above-mentioned tube connector, the pump housing, electrode, stalk all adopt ceramic material, the connection between each ceramic member is adopted ceramic ramming mass sealing-in or is used the refractory fibre product sealing-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99121476A CN1095612C (en) | 1999-11-17 | 1999-11-17 | Planar DC electromgnetic pump for casting of Al-alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99121476A CN1095612C (en) | 1999-11-17 | 1999-11-17 | Planar DC electromgnetic pump for casting of Al-alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1255768A CN1255768A (en) | 2000-06-07 |
| CN1095612C true CN1095612C (en) | 2002-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99121476A Expired - Fee Related CN1095612C (en) | 1999-11-17 | 1999-11-17 | Planar DC electromgnetic pump for casting of Al-alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1095612C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008138220A1 (en) * | 2007-05-15 | 2008-11-20 | China Aluminum International Engineering Corporation Limited | Direct-current electromagnetic pump for aluminum electrolytic cell |
| CN101018005B (en) * | 2007-02-15 | 2011-06-29 | 沈阳铝镁设计研究院有限公司 | DC electromagnetic pump |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6732890B2 (en) * | 2000-01-15 | 2004-05-11 | Hazelett Strip-Casting Corporation | Methods employing permanent magnets having reach-out magnetic fields for electromagnetically pumping, braking, and metering molten metals feeding into metal casting machines |
| CN101927333A (en) * | 2010-09-02 | 2010-12-29 | 许小忠 | Magnesium alloy electromagnetic pump quantitative casting furnace |
| JP5935776B2 (en) * | 2013-09-03 | 2016-06-15 | トヨタ自動車株式会社 | Die casting method and die casting apparatus |
| CN106972731A (en) * | 2017-05-19 | 2017-07-21 | 北京态金科技有限公司 | Liquid metal electromagnetic pump |
| MX2020005178A (en) * | 2017-12-04 | 2020-08-20 | Norsk Hydro As | Casting apparatus and casting method. |
| CN109877296A (en) * | 2019-04-12 | 2019-06-14 | 天津海特智能装备有限公司 | Electromagnetic drive low pressure casting forms heat balance device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5252727A (en) * | 1975-10-26 | 1977-04-27 | Toshio Tanikado | Device for receiving balls applied to pinball counting machines |
| SU765947A1 (en) * | 1978-07-10 | 1980-09-23 | Государственный Научно-Исследовательский Электронный Институт Им.Г.М.Кржижановского | Dc electromagnetic pump |
| US5209646A (en) * | 1991-10-16 | 1993-05-11 | The University Of Chicago | Electromagnetic induction pump for pumping liquid metals and other conductive liquids |
-
1999
- 1999-11-17 CN CN99121476A patent/CN1095612C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5252727A (en) * | 1975-10-26 | 1977-04-27 | Toshio Tanikado | Device for receiving balls applied to pinball counting machines |
| SU765947A1 (en) * | 1978-07-10 | 1980-09-23 | Государственный Научно-Исследовательский Электронный Институт Им.Г.М.Кржижановского | Dc electromagnetic pump |
| US5209646A (en) * | 1991-10-16 | 1993-05-11 | The University Of Chicago | Electromagnetic induction pump for pumping liquid metals and other conductive liquids |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101018005B (en) * | 2007-02-15 | 2011-06-29 | 沈阳铝镁设计研究院有限公司 | DC electromagnetic pump |
| WO2008138220A1 (en) * | 2007-05-15 | 2008-11-20 | China Aluminum International Engineering Corporation Limited | Direct-current electromagnetic pump for aluminum electrolytic cell |
| CN101063211B (en) * | 2007-05-15 | 2010-11-03 | 沈阳铝镁设计研究院 | Direct-current electromagnetic pump for aluminum cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1255768A (en) | 2000-06-07 |
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Owner name: BEIFANG HENGLI SCIENCE & TECHNOLOGY DEVELOPMENT C Free format text: FORMER OWNER: HUABEI POLYTECHNICAL COLLEGE Effective date: 20030718 |
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Effective date of registration: 20030718 Address after: 100089 No. 10 Lane drive, Beijing, Haidian District Patentee after: Beifang Hengli Science and Technology Development Co., Ltd., Beijing Address before: 030051 Casting Engineering Research Center, North China Institute of technology, Taiyuan, Shanxi Patentee before: Huabei Polytechnic College |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20021204 Termination date: 20111117 |