Annular electromagnetic pump with coil convenient to disassemble

Abstract

The invention provides an annular electromagnetic pump with a coil convenient to disassemble, and belongs to the technical field of electromagnetic pumps. The problem that an annular electromagnetic pump is inconvenient to disassemble is solved. The motor comprises four outer stator assemblies, a flow channel assembly and four winding coil assemblies, the outer stator assemblies are evenly fixed to the periphery of the flow channel assembly in the circumferential direction, and the winding coil assembly is fixed to the periphery of each outer stator assembly; the runner assembly comprises an inner iron core and a runner, the inner iron core is axially mounted in the runner, and the winding coil assembly comprises a plurality of winding coils. By adopting a novel winding combination mode that the four groups of winding coils are uniformly arranged in the outer circumferential direction of the pump groove assembly, the function of driving liquid metal to move is met, the winding coils can be disassembled and replaced on the premise of not damaging a pipeline, and maintenance and long-term use of the electromagnetic pump are facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnetic pumps, and in particular relates to a ring-type electromagnetic pump with a coil that is easy to disassemble. Background Art

[0002] The working principle of the annular linear induction pump is similar to that of an induction motor. In the ALIP liquid metal flow passing through the annular area, a winding coil is placed in the embedded slots and laminated ferromagnetic core outside the annular area, acting as a primary coil. Inside the annular area, another iron core is placed, and this central iron core acts as part of the magnetic flux return path. When the primary coil is excited by a three-phase AC power supply, a linearly moving magnetic field is generated, and this linearly moving electromagnetic field induces a current in the liquid metal. The interaction of this induced current and the moving magnetic field generates a force on the liquid metal, thereby generating a pumping action, and the pumping effect depends on the magnitude of the excitation current.

[0003] As the carrier of the excitation current, the life of the coil of the liquid metal electromagnetic pump is a relatively complex issue because it is affected by many factors, including but not limited to the frequency of use, the pressure and temperature of the medium, the design quality of the electromagnetic pump, the maintenance status and the working environment. Generally speaking, the life of the electromagnetic coil is between several years and more than ten years, but specifically for the coil of the liquid metal electromagnetic pump, its life may vary depending on the above factors. If the electromagnetic pump works in high temperature, high pressure or corrosive medium for a long time, the life of the coil may be significantly shortened.

[0004] As a good liquid metal driving device, the ring-type electromagnetic pump has a coil that can extend its service life through maintenance. However, in some special environments, such as the liquid metal circuit in the nuclear power field, the working life of the pump is required to be no less than 40 years. The working life of the existing coils at this stage cannot meet the requirements. Therefore, when the coil of the ring-type electromagnetic pump is damaged, it can only be replaced. However, due to the special structure of the ring-type electromagnetic pump coil, the coil needs to be disassembled and replaced by cutting the pipeline and removing the entire pump body. After the new coil is replaced, the electromagnetic pump section is welded to the pipeline. This replacement method is complicated to operate and will increase welds on the pipeline, which is not conducive to the long-term use of the pipeline. Therefore, a new coil combination and replacement method is of great significance for the maintenance and long-term use of the ring-type electromagnetic pump in the liquid metal circuit. Summary of the invention

[0005] In view of this, in order to solve the problem that the annular electromagnetic pump mentioned in the above background technology is inconvenient to disassemble, the present invention proposes an annular electromagnetic pump with a coil that is easy to disassemble.

[0006] To achieve the above object, the present invention adopts the following technical solution: a ring-type electromagnetic pump for easy removal of coils, comprising four outer stator components, a flow channel component and four winding coil components, wherein the outer stator components are evenly fixed on the outer circumference of the flow channel component, and the winding coil component is fixed on the outer circumference of each outer stator component;

[0007] The flow channel component comprises an inner iron core and a flow channel, wherein the inner iron core is axially installed in the flow channel, and the winding coil component comprises a plurality of winding coils.

[0008] Furthermore, the four sets of winding coil assemblies are supplied with three-phase alternating current in the same sequence.

[0009] Furthermore, liquid metal flows into the flow channel from one end of the electromagnetic pump, and the part of the winding coil in the inner slot of the outer stator is the effective section, which together form a current loop equivalent to a circle in the circumferential direction, thereby generating a moving traveling wave magnetic field in the magnetic outer stator and inner iron core, and the current directions of the effective sections of the four groups of coils are consistent.

[0010] Furthermore, under the action of the moving traveling wave magnetic field, an electric current will be induced in the conductive liquid metal in the flow channel. The circumferential induced current and the radial moving magnetic field interact to produce axial electromagnetic drive, thereby driving the liquid metal to flow through the flow channel and finally flow out from the other end of the electromagnetic pump.

[0011] Furthermore, the cross-section of the flow channel is annular. When the liquid metal flows in the flow channel, it passes through the alternating magnetic field generated by the four external groups of winding coil assemblies. The electromagnetic force generates a pressure gradient, which promotes the directional transmission of the liquid metal, thereby realizing the controllable transmission of the flow velocity and flow rate of the liquid metal in a completely closed state.

[0012] Compared with the prior art, the ring-type electromagnetic pump with easy-to-remove coil according to the present invention has the following beneficial effects:

[0013] (1) The present invention evenly arranges four groups of winding coils in the external circumferential direction of the pump groove assembly, wherein the portion of each winding coil in the inner slot of the outer stator is the effective action section, and the current direction of the effective sections of the four groups of coils is consistent, replacing the complete circular coil on the outer side of the pump groove of the common annular electromagnetic pump, and can generate a traveling wave magnetic field with the same effect, thereby realizing the function of the electromagnetic pump to drive the liquid metal to move, and the assembly and disassembly of the coil can be completed more conveniently.

[0014] (2) The present invention adopts a new winding combination method in which four groups of winding coils are evenly arranged in the external circumferential direction of the pump groove assembly. This not only meets the function of driving the movement of liquid metal, but also enables the disassembly and replacement of the winding coils without damaging the pipeline, thereby facilitating the maintenance and long-term use of the electromagnetic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic structural diagram of the ring-shaped electromagnetic pump with easy-to-remove coil according to the present invention;

[0017] Figure 2 A side view of the ring-shaped electromagnetic pump with easy-to-remove coil according to the present invention;

[0018] Figure 3 This is an overall structural diagram of the ring-shaped electromagnetic pump with easily disassembled coils according to the present invention.

[0019] In the figure: 1-external stator, 2-winding coil, 3-inner iron core, 4-inner wall of flow channel, 5-outer wall of flow channel. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0021] See also Figure 1-3 The present embodiment is described as follows: a ring-type electromagnetic pump for easily disassembling coils comprises four outer stator assemblies, a flow channel assembly and four winding coil assemblies, wherein the outer stator assemblies are evenly fixed to the outer circumference of the flow channel assembly, and the winding coil assembly is fixed to the outer circumference of each outer stator assembly;

[0022] The flow channel component includes an inner iron core 3 and a flow channel, wherein the inner iron core 3 is axially installed in the flow channel, the winding coil component includes a plurality of winding coils 2, and the outer stator component includes an outer stator 1.

[0023] The flow channel is an annular flow channel. When the liquid metal flows in the flow channel, it passes through the alternating magnetic field generated by the four sets of external winding coil assemblies. The electromagnetic force generates a pressure gradient, which promotes the directional transmission of the liquid metal, thereby realizing the controllable transmission of the flow rate and flow of the liquid metal in a completely closed state, and the winding coil 2 can be assembled and disassembled without damaging the pipeline.

[0024] Its structural features and working principle are as follows: the pump body is mainly composed of two parts, one part is the primary part composed of the outer stator 1, the winding coil 2 and the inner iron core 3, and the other part is the secondary part composed of the liquid metal fluid working medium and the static and conductive flow channel tube. Liquid metal flows into the flow channel from one end of the electromagnetic pump, and the four sets of winding coil assemblies are fed with three-phase alternating current of the same order. The part of the winding coil 2 in the inner slot of the outer stator 1 is the effective section, and together they form a current loop that is approximately equivalent to the common complete circular coil in the circumferential direction, thereby generating a moving traveling wave magnetic field in the magnetically conductive outer stator 1 and the inner iron core 3. Under the action of the moving magnetic field, current will be induced in the conductive liquid metal in the annular flow channel. The circumferential induced current and the radial moving magnetic field interact to generate axial electromagnetic drive, thereby driving the liquid metal to flow through the flow channel inlet transition section, the gap between the inner and outer walls of the flow channel, and the flow channel outlet transition section, and finally flow out from the other end of the pump.

[0025] For common annular electromagnetic pumps, the coil is similar to a casing, which is a complete circular coil coaxial with the pipeline and sleeved on the outside of the pipeline. When replacing, it is necessary to remove the entire pump body by cutting the pipeline to achieve disassembly and replacement of the coil. After the new coil is replaced, the electromagnetic pump section is welded to the pipeline.

[0026] In this invention, the principle of driving the liquid metal has not changed, but the structure of the coil has been changed, making it easier to assemble and disassemble the coil without destroying the pipeline.

[0027] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A ring-type electromagnetic pump with a coil that is easy to disassemble, characterized in that: It comprises four outer stator components, a flow channel component and four winding coil components, wherein the outer stator components are evenly fixed on the outer circumference of the flow channel component, and the winding coil component is fixed on the outer circumference of each outer stator component; The flow channel component comprises an inner iron core (3) and a flow channel, the inner iron core (3) being axially mounted in the flow channel, and the winding coil component comprises a plurality of winding coils (2).

2. The ring-shaped electromagnetic pump with easily disassembled coil according to claim 1, characterized in that: The four sets of winding coil assemblies are fed with three-phase alternating current of the same sequence.

3. The ring-shaped electromagnetic pump with easily disassembled coil according to claim 2, characterized in that: Liquid metal flows into the flow channel from one end of the electromagnetic pump, and the portion of the winding coil (2) in the inner slot of the outer stator component is an effective section, which together form a current loop equivalent to a circle in the circumferential direction, thereby generating a moving traveling wave magnetic field in the magnetic outer stator component and the inner iron core (3), and the current directions of the effective sections of the four groups of coils are consistent.

4. The ring-shaped electromagnetic pump with easily disassembled coil according to claim 3, characterized in that: Under the action of the moving traveling wave magnetic field, current will be induced in the conductive liquid metal in the flow channel. The circumferential induced current and the radial moving magnetic field interact to produce axial electromagnetic drive, thereby driving the liquid metal to flow through the flow channel and finally flow out from the other end of the electromagnetic pump.

5. The ring-shaped electromagnetic pump with easily detachable coil according to claim 4, characterized in that: The cross-section of the flow channel is annular. When the liquid metal flows in the flow channel, it passes through the alternating magnetic field generated by the four external groups of winding coil assemblies. The electromagnetic force generates a pressure gradient, which promotes the directional transmission of the liquid metal, thereby realizing the controllable transmission of the flow velocity and flow rate of the liquid metal in a completely closed state.

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