CN109611310B - Electromagnetic field circular arc conduit electromagnetic pump and electromagnetic pump system - Google Patents
Electromagnetic field circular arc conduit electromagnetic pump and electromagnetic pump system Download PDFInfo
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- CN109611310B CN109611310B CN201811653439.9A CN201811653439A CN109611310B CN 109611310 B CN109611310 B CN 109611310B CN 201811653439 A CN201811653439 A CN 201811653439A CN 109611310 B CN109611310 B CN 109611310B
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- silicon steel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
- F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an electromagnetic field arc guide pipe electromagnetic pump and an electromagnetic pump system, wherein the electromagnetic field arc guide pipe electromagnetic pump comprises a motor, a coupler, an electricity taking ring, a pair of electromagnetic coils, a pair of magnetic conduction silicon steel groups, an arc guide pipe, a pump shaft and an air gap, wherein the pump shaft is fixedly arranged on the motor through the coupler, a pair of magnetic conduction silicon steel groups form openings which are relatively and fixedly arranged on the pump shaft, a pair of electromagnetic coils are respectively and correspondingly arranged on the pair of magnetic conduction silicon steel groups, the air gap and the arc guide pipe are arranged between the openings of the pair of magnetic conduction silicon steel groups, and the electromagnetic coils are electrically connected with the electricity taking ring; the electromagnetic field circular arc conduit electromagnetic pump can solve the problem of high-temperature liquid alkali metal fluid transportation in a laboratory, especially in a low-flow and low-resistance test loop, on the premise of low cost and short period.
Description
Technical Field
The invention relates to the technical field of electromagnetic pumps, in particular to an electromagnetic field arc guide pipe electromagnetic pump and an electromagnetic pump system which are particularly suitable for being used in a scientific laboratory.
Background
The transportation of molten liquid alkali metal under high temperature condition, especially the transportation of high temperature liquid alkali metal in the laboratory small-sized experiment device pipeline is the first problem to be solved in the device construction, and this is mainly caused by the physical properties of alkali metal and the high temperature operation condition thereof. Alkali metals are chemically active, flammable and explosive, are not exposed to air, react violently when in contact with water, and can produce hydrogen bursts. Commercial electromagnetic pumps often face relatively expensive capital and relatively long cycles, and performance metrics do not fully meet the wide range of performance tuning requirements of laboratory scientific research activities. Therefore, the convenient manufacture of high temperature liquid alkali metal fluid delivery devices in a short period of time using laboratory conditions is a constant force of alkali metal researchers.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide an electromagnetic field circular arc guide pipe electromagnetic pump and an electromagnetic pump system, and the electromagnetic field circular arc guide pipe electromagnetic pump can solve the problem of high-temperature liquid alkali metal fluid transportation in a laboratory, especially in a low-flow and low-resistance test loop, on the premise of low cost and short period.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the electromagnetic field circular arc conduit electromagnetic pump comprises a motor, a coupler, an electricity taking ring, a pair of electromagnetic coils, a pair of magnetic conduction silicon steel groups, a circular arc conduit, a pump shaft and an air gap, wherein the pump shaft is fixedly installed on the motor through the coupler, a pair of magnetic conduction silicon steel group forming openings are relatively and fixedly installed on the pump shaft, the pair of electromagnetic coils are respectively and correspondingly arranged on the pair of magnetic conduction silicon steel groups, the air gap and the circular arc conduit are arranged between the pair of openings of the magnetic conduction silicon steel groups, the electromagnetic coils are electrically connected with the electricity taking ring, direct current electric energy is obtained through the electricity taking ring on the pump shaft when the electromagnetic coils pass through the magnetic conduction silicon steel groups to generate a magnetic field, and the magnetic field generated by the electromagnetic coils on two sides of the circular arc conduit forms a closed loop through the magnetic conduction of the silicon steel groups in the air gap between the circular arc conduit.
Further, a multi-layer ceramic fiber plate for heat insulation function is provided between the circular arc guide pipe and the electromagnetic coils located at both sides thereof.
Further, the magnetic conduction silicon steel group is formed by stacking n-type silicon steel sheets.
Further, the arc guide pipe is made of nonmagnetic seamless steel pipes.
Further, the power taking ring is arranged on two sections of the pump shaft adjacent to the outer part of the electromagnetic coil, and the pump shaft is provided with a rolling bearing through the middle part of the pump shaft to form rolling connection.
Further, the motor is a variable frequency motor.
Meanwhile, the scheme also provides an electromagnetic field arc conduit electromagnetic pump system, which comprises the electromagnetic field arc conduit electromagnetic pump, and further comprises a frequency converter, a direct current power supply and a controller, wherein the frequency converter is electrically connected with a motor in the electromagnetic pump and used for controlling the rotating speed of the motor, the direct current power supply is electrically connected with an electromagnetic coil in the electromagnetic pump, and the controller is respectively electrically connected with the frequency converter and the direct current power supply.
Compared with the prior art, the beneficial technical effects that this scheme had are:
the electromagnetic pump provided by the invention is suitable for high-temperature liquid alkali metal, has the advantages of simple structure, high reliability, easiness in material acquisition, low mechanical processing requirement, low cost and shorter manufacturing period;
secondly, the electromagnetic pump provided by the invention has good adjustability, the motor rotating speed is controlled through the frequency converter, the electromagnet driving current is changed through the direct current power supply, the P-Q output characteristic of the pump can be changed in a large range, and the reliability is good;
the electromagnetic pump provided by the invention has a self-heating effect, and can be directly started in a cold way for normal-temperature solid alkali metal without preheating by an additional heater; the pump has the advantages that the application temperature range is wide, the highest use temperature is limited by pump groove materials, non-heat-resistant parts such as the pump shaft and the electromagnet have self-cooling working characteristics, additional cooling is not needed, and the self thermal safety is ensured in structural design.
Drawings
FIG. 1 is a schematic diagram of the electromagnetic pump structure of the electromagnetic field arc conduit in the present invention.
FIG. 2 is a schematic diagram of the electromagnetic field arc conduit electromagnetic pump system of the present invention.
Fig. 3 is a schematic diagram of the basic working principle of the electromagnetic field arc conduit electromagnetic pump in the invention.
In the figure:
1-motor, 2-coupling, 3-electricity taking ring, 4-electromagnetic coil, 5-magnetic conduction silicon steel group, the device comprises a 6-arc guide pipe, a 7-pump shaft, an 8-air gap, a 9-direct current power supply, a 10-frequency converter and a 11-controller.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The scheme aims at the fact that the existing commercial electromagnetic pump often faces more expensive funds and whether the existing commercial electromagnetic pump is a 'commercial electromagnetic pump', and if no problem exists, the electromagnetic pump does not need to be modified. The electromagnetic field circular arc guide pipe electromagnetic pump and the electromagnetic pump system are provided on the premise that performance indexes can not completely meet the requirement of large-range performance adjustment of laboratory scientific research activities, and the electromagnetic field circular arc guide pipe electromagnetic pump can solve the problem of high-temperature liquid alkali metal fluid transportation in a laboratory, especially in a low-flow and low-resistance test loop, on the premise of low cost and short period.
Referring to fig. 1, a schematic structure of an electromagnetic field arc catheter electromagnetic pump in this embodiment is shown. The electromagnetic pump in this embodiment includes a motor 1, a coupling 2, an electricity taking ring 3, a pair of electromagnetic coils 4, a pair of magnetic conduction silicon steel sets 5, an arc conduit 6, a pump shaft 7 and an air gap 8, wherein the pump shaft 7 is fixedly installed on the motor 1 through the coupling, the pump shaft 7 is driven to rotate by the motor 1, a pair of magnetic conduction silicon steel sets 5 form openings relatively and fixedly installed on the pump shaft 7, i.e. a pair of magnetic conduction silicon steel sets 5 are installed on two ends of the pump shaft 7, an opening is formed between the two, and simultaneously a pair of electromagnetic coils 4 are respectively correspondingly arranged on the pair of magnetic conduction silicon steel sets 5, the air gap 8 and the arc conduit 6 are arranged between the openings of the pair of magnetic conduction silicon steel sets 5, the electromagnetic coils 4 are electrically connected with the electricity taking ring 3, wherein when the electromagnetic coils 4 obtain direct current energy through the electricity taking ring 3 on the pump shaft 7, the magnetic field is generated, the magnetic field generated by the electromagnetic coils 4 on two sides of the arc conduit 6 form a closed loop through the magnetic conduction of the silicon steel sets, and the air gap 8 between the arc conduit 6.
Specifically, the source of the magnetic field generated in the electromagnetic field arc guide pipe electromagnetic pump air gap 8 is an electromagnet, and the electromagnet main body consists of an n-shaped magnetic conduction silicon steel group 5 and an electromagnetic coil 4 arranged in the middle of the n-shaped magnetic conduction silicon steel. A cover open air gap 8 is provided between the n-shaped magnetically permeable silicon steel sets 5, which is mainly used for arranging the arc guide tube 6 and the multi-layer ceramic fiber board for heat insulation. The ceramic fiber board is arranged, because in the actual working process, the temperature of the liquid alkali metal used by a user is usually higher and can reach more than 600 ℃, the heat of the arc guide pipe 6 endangers the working safety of the electromagnet, and therefore, the electromagnetic field arc guide pipe electromagnetic pump is provided with the multi-layer heat-insulating ceramic fiber board between the arc guide pipe 6 and the electromagnet, so that the heat transfer is reduced. In actual operation, the number of layers of the heat-insulating multilayer ceramic fiber board is generally more than or equal to 2, the specific number of layers of the specific ceramic fiber board is selected according to the working temperature of liquid alkali metal in the circular arc guide pipe 6, the higher the working temperature is, the number of layers is properly increased, and the heat-insulating board cannot be made of conductive metal materials, so that extra electromagnetic induction is caused to weaken the intensity of induced current generated in the circular arc guide pipe 6, and the efficiency of the pump is reduced. The electromagnet in this embodiment is similar to a part of a transformer, the silicon steel set is formed by stacking n-shaped silicon steel sheets with a certain thickness, the electromagnetic coil 4 is wound on a non-metal framework with a split structure, the electromagnetic coil 4 obtains direct current from the electricity taking ring 3, the electricity taking ring 3 is used for continuously taking electricity under the rotating condition of the electromagnet, the structure of the electromagnet is composed of the non-metal framework fixed on the pump shaft 7 and a plurality of conductive copper rings, and the fixed electric brush is continuously contacted with the rotating electricity taking ring 3 to form uninterrupted power supply.
Meanwhile, the circular arc guide pipe 6 in the embodiment is made of a seamless steel pipe which is compatible with alkali metal, and the mechanical property meets the working condition requirement, and particularly, the circular arc guide pipe 6 is made of a non-magnetic material, and austenitic stainless steel 304, 321, 316 and the like are all good choices.
In addition, the pump shaft 7 in this embodiment is formed by three sections, wherein the electricity taking ring 3 is fixed on two sections of shafts outside the electromagnet, the pump shaft 7 is connected with the shaft supporting structure through a rolling bearing to reduce friction resistance during rotation, the rolling bearing usually selects a maintenance-free high-speed bearing, and the acting force during operation is symmetrical along the direction of the pump shaft 7 due to the complete symmetry of the mechanism of the pump body, so that a thrust bearing is not needed. In addition, the motor 1 in the embodiment is a variable frequency motor, the rotating speed of the pump shaft 7 can be conveniently changed, the motor 1 is connected with the pump shaft 7 through the coupler 2, and the requirements can be met by selecting the rigid coupler 2 as in the common centrifugal water pump mode. Of course, in order to change the external configuration of the pump, the motor is arranged parallel to the pump, and transmission in the form of gears, belts, chains, etc. is also an option, which can be used in combination with the actual situation of the user, but this always reduces the efficiency and reliability of the pump.
Referring to fig. 2, the present embodiment further provides an electromagnetic field arc conduit electromagnetic pump system including the electromagnetic field arc conduit electromagnetic pump, where the electromagnetic pump system includes an electromagnetic field arc conduit electromagnetic pump as described above, and further includes a frequency converter 10, a dc power supply 9, and a controller 11, where the frequency converter 10 is electrically connected to the motor 1 in the electromagnetic pump and is used to control the rotation speed of the motor 1, the dc power supply 9 is electrically connected to the electromagnetic coil 4 in the electromagnetic pump, and the controller 11 is electrically connected to the frequency converter 10 and the dc power supply 9 respectively. In actual operation, the electromagnetic coil 4 obtains direct current provided by the direct current power supply 9 from the electricity taking ring 3, and the working current of the electromagnet can be adjusted through the direct current power supply 9, a control signal is automatically or manually sent out by the controller 11 according to the need, and the adjustment of the working current of the electromagnet can cause the change of the magnetic field intensity B of the air gap 8. In practice, the controller 11 is preferably constructed by a PLC, and other types of controllers 11 may be also used, and since the rotational speed of the electromagnetic field arc conduit electromagnetic pump motor 1 is controllable and the driving current of the electromagnet is controllable, various operation characteristics can be constructed by the controller 11 through convenient programming, such as: the constant rotation speed and magnetic field intensity variable rotation speed operation mode, the constant output flow operation mode, the constant output pressure operation mode and the like are greatly convenient for laboratory scientific research users to need.
Referring to fig. 3, when the motor 1 is operated, the shaft 7 is driven to rotate by the coupling 2, and then the electromagnet composed of the magnetic conduction silicon steel set 5 and the electromagnetic coil 4 is driven to rotate around the shaft, the electromagnetic coil 4 obtains direct current electric energy through the electricity taking ring 3 on the shaft 7 to generate a magnetic field, the magnetic fields generated by the electromagnetic coils 4 on two sides of the circular arc guide tube 6 are conducted by the silicon steel set to form a closed loop through the air gap 8 between the circular arc guide tube 6. The magnetic force lines between the air gaps 8 continuously cut the liquid alkali metal (conductor) in the stationary circular arc guide tube 6 during the rotation movement of the pump shaft 7 to form an induced current (right-hand rule) perpendicular to the magnetic force line direction and the magnetic field movement direction, and the induced current generates an acting force (ampere force, left-hand rule) perpendicular to the magnetic force line direction and the induced current direction under the action of the magnetic field, so that the liquid alkali metal in the circular arc guide tube 6 generates fluid movement in the same direction as the rotation direction in the circular arc guide tube 6 along with the rotation of the pump shaft 7. It is obvious that the fluid output direction of the circular arc conduit electromagnetic pump can be changed by changing the rotation direction of the pump shaft 7, that is, the circular arc conduit electromagnetic pump can convey fluid in the forward and reverse directions as in most induction electromagnetic pumps. In practice, the motor 1 can be flexibly adjusted as required, that is, the motor 1 drives the pump shaft 7 to generate rotary motion mainly through the coupling 2, and then drives the electromagnet to rotate, the rotating speed VR is controlled through the frequency converter 10, and different induced current intensities Ii can be generated in liquid alkali metal. The electromagnetic coil 4 is powered by a direct current power supply 9, and the direct current power supply 9 can adjust the current intensity Ic in the electromagnetic coil 4 according to the requirement, so as to adjust the magnetic field intensity B in the air gap 8 of the electromagnet. The control command of the rotating speed VR of the motor 1 and the power supply current intensity Ic of the electromagnetic coil 4 is sent out by the controller 11 according to the user demand.
Finally, it should be noted that in practice, many alkali metals are solid at normal temperature, and for a traditional mechanical electromagnetic pump, an additional heater is needed to preheat the alkali metals in the pump cavity and the pipeline, so that the alkali metals are melted into a liquid state to start the pump. For the electromagnetic field circular arc guide pipe electromagnetic pump in the scheme, the rotating structure of the electromagnetic field circular arc guide pipe electromagnetic pump is not in direct contact with alkali metal, the electromagnetic field circular arc guide pipe electromagnetic pump can be started at any time, and the electromagnetic field circular arc guide pipe electromagnetic pump is accompanied with an induction heating effect during operation, so that solid alkali metal in the circular arc guide pipe 6 can be automatically melted.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (2)
1. An electromagnetic field circular arc catheter electromagnetic pump which is characterized in that: the electromagnetic pump comprises a motor, a coupler, an electricity taking ring, a pair of electromagnetic coils, a pair of magnetic conduction silicon steel groups, an arc guide pipe, a pump shaft and an air gap, wherein the pump shaft is fixedly arranged on the motor through the coupler, a pair of magnetic conduction silicon steel groups form openings which are relatively and fixedly arranged on the pump shaft, a pair of electromagnetic coils are respectively and correspondingly arranged on the pair of magnetic conduction silicon steel groups, the air gap and the arc guide pipe are arranged between the openings of the pair of magnetic conduction silicon steel groups, the electromagnetic coils are electrically connected with the electricity taking ring, when the electromagnetic coils obtain direct current electric energy through the electricity taking ring on the pump shaft, a magnetic field is generated, and the magnetic fields generated by the electromagnetic coils on two sides of the arc guide pipe form a closed loop through the magnetic conduction of the silicon steel groups and the air gap between the arc guide pipes; a multi-layer ceramic fiber board for heat insulation is arranged between the arc guide pipe and the electromagnetic coils positioned at the two sides of the arc guide pipe; the magnetic conduction silicon steel group is formed by stacking n-shaped silicon steel sheets; the arc guide pipe is made of nonmagnetic seamless steel pipes; the power taking ring is arranged on two sections of the pump shaft adjacent to the outside of the electromagnetic coil, and the pump shaft is provided with a rolling bearing through the middle part of the pump shaft to form rolling connection; the motor is a variable frequency motor.
2. An electromagnetic pump system comprising the electromagnetic field arc conduit electromagnetic pump of claim 1, wherein: the electromagnetic pump also comprises a frequency converter, a direct current power supply and a controller, wherein the frequency converter is electrically connected with a motor in the electromagnetic pump and used for controlling the rotating speed of the motor, the direct current power supply is electrically connected with an electromagnetic coil in the electromagnetic pump, and the controller is respectively electrically connected with the frequency converter and the direct current power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811653439.9A CN109611310B (en) | 2018-12-29 | 2018-12-29 | Electromagnetic field circular arc conduit electromagnetic pump and electromagnetic pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811653439.9A CN109611310B (en) | 2018-12-29 | 2018-12-29 | Electromagnetic field circular arc conduit electromagnetic pump and electromagnetic pump system |
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| Publication Number | Publication Date |
|---|---|
| CN109611310A CN109611310A (en) | 2019-04-12 |
| CN109611310B true CN109611310B (en) | 2023-09-29 |
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| CN201811653439.9A Active CN109611310B (en) | 2018-12-29 | 2018-12-29 | Electromagnetic field circular arc conduit electromagnetic pump and electromagnetic pump system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582627A (en) * | 2009-06-29 | 2009-11-18 | 中国科学院等离子体物理研究所 | Liquid metal electromagnetic pump |
| CN102562553A (en) * | 2012-03-01 | 2012-07-11 | 深圳华星恒泰泵阀有限公司 | Electromagnetic water pump and output flow control method thereof |
| CN202531407U (en) * | 2012-03-01 | 2012-11-14 | 深圳华星恒泰泵阀有限公司 | Electromagnetic water pump capable of controlling output flow |
| WO2016003643A1 (en) * | 2014-07-03 | 2016-01-07 | Schlumberger Canada Limited | Electromagnetic actuator |
| CN105591521A (en) * | 2016-03-10 | 2016-05-18 | 日东电子科技(深圳)有限公司 | Electromagnetic pump for conveying liquid nonferrous metal |
-
2018
- 2018-12-29 CN CN201811653439.9A patent/CN109611310B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582627A (en) * | 2009-06-29 | 2009-11-18 | 中国科学院等离子体物理研究所 | Liquid metal electromagnetic pump |
| CN102562553A (en) * | 2012-03-01 | 2012-07-11 | 深圳华星恒泰泵阀有限公司 | Electromagnetic water pump and output flow control method thereof |
| CN202531407U (en) * | 2012-03-01 | 2012-11-14 | 深圳华星恒泰泵阀有限公司 | Electromagnetic water pump capable of controlling output flow |
| WO2016003643A1 (en) * | 2014-07-03 | 2016-01-07 | Schlumberger Canada Limited | Electromagnetic actuator |
| CN105591521A (en) * | 2016-03-10 | 2016-05-18 | 日东电子科技(深圳)有限公司 | Electromagnetic pump for conveying liquid nonferrous metal |
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| CN109611310A (en) | 2019-04-12 |
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