Axial flow shield pump and device for liquid transmission

Abstract

The invention relates to the field of shield pumps, in particular to an axial-flow shield pump and device for liquid transmission, and the axial-flow shield pump comprises a rotor assembly, a stator assembly and a shield pipe; the stator assembly is fixedly arranged on the outer side of the shielding tube; the rotor assembly is rotatably arranged on the inner side of the shielding pipe; liquid flows in from one end of the shielding pipe, passes through the rotor assembly and flows out from the other end of the shielding pipe; the stator assembly forms a rotating magnetic field after being connected with an external power supply, and the rotor assembly rotates under the action of the rotating magnetic field; the shield tube isolates the liquid from the stator assembly.

Description

Technical Field

[0001] The present disclosure relates to the field of canned motor pumps, and more particularly, to an axial flow canned motor pump and a device for liquid transmission. Background Art

[0002] In industrial production, gases such as liquid metallic sodium and aerosols containing heavy metals are toxic and harmful substances that pose serious hazards to the human body and the environment. Therefore, special measures need to be taken to ensure safety during transportation and storage.

[0003] Commonly used transportation methods include pumping and pipeline transportation. For example, vane pumps require a transmission shaft to transmit power between the motor and the impeller, and the transmission shaft needs to pass through the outer shell of the pump body. The seal at the penetration point is extremely important. For some cases with high sealing requirements, the shaft seal at the penetration point of the vane pump transmission shaft is difficult to meet the requirements; and some conductive media can be transported using electromagnetic pumps. There are no moving parts inside the electromagnetic pump, and the sealing difficulty is low. The shell of the electromagnetic pump is thicker, which makes the sealing effect of the electromagnetic pump better, but the working efficiency of the electromagnetic pump is low, which will cause waste of electricity.

[0004] In the related technology, the transmission shaft of the shielded pump does not pass through the pump body, does not require a shaft seal, and has a good sealing effect. However, the existing shielded pumps are large in size, have a high failure rate, and are difficult to maintain and repair on a daily basis. Therefore, how to optimize the internal structure of the shielded pump while meeting the sealing requirements has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of the above problems, the present disclosure provides an axial flow canned pump for liquid transportation, which can improve the integration of internal parts and meet the sealing requirements during the transportation of toxic and hazardous liquids.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an axial-flow shielded pump for liquid transmission, comprising: a rotor assembly, a stator assembly and a shielding tube; the stator assembly is fixedly arranged on the outer side of the shielding tube; the rotor assembly is rotatably arranged on the inner side of the shielding tube; the liquid flows into one end of the shielding tube, passes through the rotor assembly, and flows out from the other end of the shielding tube; after the stator assembly is connected to an external power supply, a rotating magnetic field is formed, and the rotor assembly rotates under the action of the rotating magnetic field; the shielding tube isolates the liquid from the stator assembly.

[0007] In an illustrative embodiment, the rotor assembly includes: a rotor tube, a rotor shell, a permanent magnet, a magnetite, blades, and a rotating support; the rotor shell is fixedly arranged outside the rotor tube and forms a accommodating space, and the permanent magnet and the magnetite are arranged in the accommodating space; the blades are fixedly arranged in the rotor tube, and the rotation of the rotor tube drives the blades to rotate, and the blades transmit the force to the liquid entering the rotor tube; the rotating support is configured so that the rotor tube is rotatably supported in the shielding tube.

[0008] In an illustrative embodiment, one end of the blade is fixed to the inner wall of the rotor tube.

[0009] In an illustrative embodiment, the rotor housing is sealedly connected to the rotor tube.

[0010] In an illustrative embodiment, the stator assembly includes: a stator assembly housing and a coil, wherein the coil is disposed inside the stator assembly housing; the stator assembly housing is fixedly connected to the shielding tube to form an enclosed space; and a rotating magnetic field is formed when the coil is energized.

[0011] The present disclosure also provides a device using the axial flow shielded pump in any of the above-mentioned embodiments, including a fluid pipeline, in which the above-mentioned liquid flows, the above-mentioned fluid pipeline is connected to one end of the above-mentioned shielding pipe, the above-mentioned liquid flows from the above-mentioned fluid pipeline into the above-mentioned axial flow shielded pump, the other end of the above-mentioned shielding pipe is connected to the above-mentioned fluid pipeline, and after the above-mentioned liquid is acted upon by the above-mentioned axial flow shielded pump, it flows into the above-mentioned fluid pipeline from the other end of the above-mentioned shielding pipe.

[0012] In an illustrative embodiment, the connection between the fluid pipeline and the shielding pipe is a sealed connection.

[0013] The axial flow shielded pump for liquid transmission provided by the present disclosure, in the energized state, the liquid to be transmitted flows into the axial flow shielded pump from one end of the shielded tube, and when flowing through the rotor assembly inside the shielded tube, the stator assembly is energized to generate a rotating magnetic field, and the rotor assembly rotates under the action of the rotating magnetic field to push the internal liquid to flow to the other end of the shielded tube along the axial direction of the rotor assembly, and finally flows out of the axial flow shielded pump. The rotor assembly is located in the shielded tube as a whole, and the liquid flows in the hollow cavity of the shielded tube and the rotor assembly. The two ends of the shielded tube are directly connected to the fluid pipeline port, and there is no transmission shaft passing through the pump body, and no shaft seal is required. Only the shielded tube and the fluid pipeline need to be connected, which solves the problem of insufficient sealing during liquid transmission; the stator assembly does not contact with the liquid, and the rotor assembly is driven to rotate by magnetic force outside the shielded tube, so as to drive the liquid to flow along the axial direction, which not only has high energy conversion efficiency, but also saves complex transmission components, reduces the occupied space, reduces costs, and improves work reliability; in addition, the liquid flows along the axial direction, which is conducive to the arrangement of the fluid pipeline in a small space usage scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above contents and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0015] Figure 1 It is a cross-sectional view of an axial flow shielded pump for liquid transmission provided by the present disclosure.

[0016] In the above drawings, the meanings of the reference numerals are as follows:

[0017] 1. Rotor assembly;

[0018] 10. Rotor pipe fittings;

[0019] 11. Rotor housing;

[0020] 12. Permanent magnet;

[0021] 13. Magnetizer;

[0022] 14. Leaves;

[0023] 15. Rotate the support member;

[0024] 2. Stator assembly;

[0025] 20. stator assembly housing;

[0026] 21. Coil;

[0027] 3. Shielding tube. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure.

[0029] The terms "include", "comprising", etc. used herein indicate the presence of the features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components. All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0030] In this document, unless otherwise specifically stated, directional terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present disclosure, and do not indicate or imply that the device, element or component referred to must have a specific orientation, be constructed or operate in a specific orientation. It should be understood that when the absolute position of the described object changes, the relative positional relationship they represent may also change accordingly. Therefore, these directional terms should not be understood as limiting the present disclosure.

[0031] When using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc. When using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.

[0032] At present, canned motor pumps are the main devices for transmitting toxic and hazardous liquids. They have good sealing properties and are relatively safe, but they are large in size. In addition, since key components such as the rotor, drive shaft, and impeller are all located in a sealed container, they are difficult to maintain, prone to failure, and difficult to repair after a failure.

[0033] Therefore, how to optimize the structure of the shielded pump and improve the integration of internal parts so that the shielded pump can appropriately save manufacturing costs and reduce the failure rate while ensuring the sealing has become a technical problem that needs to be solved urgently.

[0034] Figure 1 It is a cross-sectional view of an axial flow canned pump for liquid transmission provided by the present disclosure.

[0035] The exemplary embodiment of the present disclosure provides an axial flow canned pump for liquid transmission, such as Figure 1 As shown, it includes a rotor assembly 1, a stator assembly 2 and a shielding tube 3, wherein the stator assembly 2 is fixedly arranged on the outside of the shielding tube 3, and the rotor assembly 1 is rotatably arranged on the inside of the shielding tube 3; the liquid flows into the axial flow shielding pump from one end of the shielding tube 3, passes through the rotor assembly 1, and leaves the axial flow shielding pump from the other end of the shielding tube 3; after the stator assembly 2 is connected to an external power supply, a rotating magnetic field is formed, and the rotor assembly 1 rotates under the action of the rotating magnetic field; the shielding tube 3 isolates the liquid from the stator assembly 2.

[0036] In such an embodiment, the axial flow shielded pump is powered on and in the open state, and the liquid to be transmitted flows into the axial flow shielded pump from one end of the shielded tube 3. When flowing through the rotor assembly 1 inside the shielded tube 3, the stator assembly 2 is powered on to generate a rotating magnetic field, and the rotor assembly 1 rotates under the action of the rotating magnetic field to push the internal liquid to flow along the axial direction of the rotor assembly 1 to the other end of the shielded tube 3, and finally flows out of the axial flow shielded pump. The rotor assembly 1 is located in the shielded tube 3 as a whole, and the liquid flows in the cavity of the shielded tube 3 and the rotor assembly 1. There is no transmission shaft passing through the pump body, and no shaft seal is required. Before working, only the shielded tube 3 and the fluid pipeline need to be connected, which better solves the problem of insufficient sealing during liquid transmission; the stator assembly 2 does not contact the liquid, and the rotor assembly 1 is driven to rotate by magnetic force outside the shielded tube 3 so that the liquid flows axially, which not only has high energy conversion efficiency, but also saves transmission components, reduces occupied space, reduces costs, and improves work reliability; in addition, the liquid flows axially, which is conducive to the arrangement of fluid pipelines in a small space usage scenario.

[0037] According to an embodiment of the present disclosure, the rotor assembly 1 includes a rotor tube 10, a rotor shell 11, a permanent magnet 12, a magnet conductor 13, a blade 14 and a rotating support 15, wherein the rotor shell 11 is fixedly arranged outside the rotor tube 10 and forms a accommodating space, and the permanent magnet 12 and the magnet conductor 13 are arranged in the accommodating space; the blade 14 is fixedly arranged in the rotor tube 10, and the blade 14 is driven to rotate by the rotor tube 10, and the blade 14 transmits the force to the liquid entering the rotor tube 10; the rotating support 15 is configured so that the rotor tube 10 is rotatably supported in the shielding tube 3.

[0038] In such an embodiment, the permanent magnet 12 and the magnetizer 13 are arranged in the accommodation space formed by the rotor housing 11 and the rotor tube 10, which can isolate the liquid and play a protective role; the rotating support 15 is used to support the rotor tube 10 to rotate in the shielding tube 3, and the rotor tube 10 rotates through the interaction between the permanent magnet 12 and the magnetizer 13 and the stator assembly 2, so that the blades 14 drive the liquid in the rotor tube 10 to flow along the axial direction of the shielding tube 3. Since the blades 14 are directly fixed in the rotor tube 10, and the cavity in the rotor tube 10 is used for liquid to pass, the integration and work efficiency are improved; during the flow of liquid, it can also play a certain lubricating role on the rotating support 15.

[0039] According to an embodiment of the present disclosure, further, one end of the blade 14 is fixed to the inner wall of the rotor tube 10, and multiple blades 14 are arranged at intervals along the circumferential direction on the inner wall of the rotor tube 10 to form a blade group, and the multiple blade groups are distributed axially from one end to the other end of the rotor tube 10.

[0040] More specifically, the blades 14 and the rotor tube 10 are integrally formed using 3D printing technology.

[0041] According to the embodiments of the present disclosure, the permanent magnets 12 and the magnetizers 13 are alternately arranged axially in the accommodation space, so that the rotor always remains relatively stationary with the magnetic poles of the stator during rotation, thereby reducing magnetic resistance and improving work efficiency; in addition, the alternating arrangement of the permanent magnets 12 and the magnetizers 13 can also make the temperature distribution of the rotor assembly 1 more uniform, improve work reliability, and extend service life.

[0042] According to an embodiment of the present disclosure, the rotor housing 11 maintains a sealed connection with the rotor tube 10 to prevent the permanent magnet 12 and the magnet conductor 13 from being affected by the transmission liquid.

[0043] In an exemplary embodiment, the stator assembly 2 includes a stator assembly housing 20 and a coil 21 , and the coil is disposed inside the stator assembly housing 20 ; the stator assembly housing 20 is fixedly connected to the shielding tube 3 to form a closed space.

[0044] In such an embodiment, after the coil 21 is energized, it interacts with the rotor assembly 1 and drives the rotor assembly 1 to rotate; since the flowing liquid can produce a heat dissipation effect on the coil 21, there is no need to set up a separate heat dissipation mechanism, so the stator assembly housing 20 and the shielding tube 3 are fixedly connected and sealed to form an enclosed space.

[0045] In some other embodiments, the heat generated by the coil 21 can also be used to preheat the liquid in the pump.

[0046] The present disclosure also provides a device, which adopts the axial flow shielded pump in any of the above-mentioned embodiments, and the device also includes a fluid pipeline, in which the liquid flows; the fluid pipeline is connected to one end of the shielding tube 3, and the liquid flows from the fluid pipeline into the axial flow shielded pump, and the other end of the shielding tube 3 is connected to the fluid pipeline. After the liquid passes through the axial flow shielded pump, it flows into the fluid pipeline from the other end of the shielding tube 3.

[0047] According to an embodiment of the present disclosure, the connection between the fluid pipeline and the shielding pipe 3 is a sealed connection.

[0048] Specifically, to facilitate replacement and maintenance, the fluid pipeline and the shielding pipe 3 are detachably connected, and the connecting parts used include but are not limited to flanges or clamps.

[0049] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways, even if such combinations and / or combinations are not explicitly described in the present disclosure. In particular, the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways without departing from the spirit and teachings of the present disclosure. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0050] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. An axial flow canned pump for liquid transmission, characterized in that: It includes: A rotor assembly (1), a stator assembly (2) and a shielding tube (3); The stator assembly (2) is fixedly arranged on the outside of the shielding tube (3); The rotor assembly (1) is rotatably arranged inside the shielding tube (3); The liquid flows in from one end of the shielding tube (3), passes through the rotor assembly (1), and flows out from the other end of the shielding tube (3); The stator component (2) forms a rotating magnetic field after being connected to an external power source, and the rotor component (1) rotates under the action of the rotating magnetic field; The shielding tube (3) isolates the liquid from the stator assembly (2).

2. The axial flow canned motor pump according to claim 1, characterized in that: The rotor assembly (1) comprises: a rotor tube (10), a rotor housing (11), a permanent magnet (12), a magnetic conductor (13), blades (14), and a rotating support (15); The rotor housing (11) is fixedly arranged outside the rotor tube (10) and forms a receiving space, and the permanent magnet (12) and the magnet conductor (13) are arranged in the receiving space; The blade (14) is fixedly arranged in the rotor tube (10), and the blade (14) is driven to rotate by the rotation of the rotor tube (10), and the blade (14) transmits a force to the liquid entering the rotor tube (10); The rotation support member (15) is configured so that the rotor tube member (10) is rotationally supported in the shielding tube (3).

3. The axial flow canned motor pump according to claim 2, characterized in that: One end of the blade (14) is fixed to the inner wall of the rotor tube (10).

4. The axial flow canned motor pump according to claim 2, characterized in that: The rotor housing (11) is sealedly connected to the rotor tube (10).

5. The axial flow canned motor pump according to claim 1, characterized in that: The stator assembly (2) comprises: a stator assembly housing (20) and a coil (21), wherein the coil (21) is arranged inside the stator assembly housing (20); The stator assembly housing (20) is fixedly connected to the shielding tube (3) to form a closed space; The coil (21) forms a rotating magnetic field after being energized.

6. A device using the axial flow canned pump according to any one of claims 1 to 5, characterized in that: The device comprises a fluid pipeline, in which the liquid flows, The fluid pipeline is connected to one end of the shielding pipe (3), and the liquid flows from the fluid pipeline into the axial flow shielding pump. The other end of the shielding pipe (3) is connected to the fluid pipeline, and the liquid flows from the other end of the shielding pipe (3) into the fluid pipeline after being acted upon by the axial flow shielding pump.

7. The device according to claim 6, characterized in that The connection between the fluid pipeline and the shielding pipe (3) is a sealed connection.

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