Axial flow pump for liquid metal

Abstract

This utility model discloses a dedicated axial flow pump for liquid metal, comprising a housing and an internal rotor of a motor disposed within the housing. The housing has an inlet and an outlet, and the internal rotor of the motor has a liquid flow channel connecting the inlet and outlet. An impeller is provided on the wall of the liquid flow channel. An external stator of the motor is disposed outside the internal rotor, and a radiator is disposed outside the external stator. A sealing gap is provided between the internal rotor of the motor and the housing, and a supporting bearing is disposed within the sealing gap. The sealing gap is an open structure. This utility model achieves dynamic sealing of the internal rotor of the motor within the integral pipe formed by the inlet, liquid flow channel, and outlet through the liquid metal in the sealing gap. Compared with mechanical seals, it is less prone to wear and leakage problems and has a better sealing effect. At the same time, the liquid metal can lubricate the supporting bearing, eliminating the need for additional grease, lubricating oil, or other lubricating materials and preventing cross-contamination.

Description

Technical Field

[0001] This utility model belongs to the field of liquid pump technology, and specifically relates to an axial flow pump for liquid metal. Background Technology

[0002] Liquid metals are a class of metals or alloys that are liquid at room temperature or operating temperature. They have unique physicochemical properties that make them important in industries such as industry, electronics, and energy.

[0003] Axial flow pumps are common fluid transport devices. Existing axial flow pumps, such as those described in "CN202510373246.1 A Self-Cleaning Axial Flow Pump," typically have liquid inlet and outlet not on the same axis, and the shaft needs to extend deep into the pipeline. Therefore, the overall equipment is relatively complex and occupies a large space. Furthermore, existing axial flow pumps usually use mechanical seals, which are prone to leakage after wear, affecting the sealing effect. They also require grease or lubricating oil for lubrication, but liquid metal can contaminate these media, further affecting the sealing effect. Based on the shortcomings of the existing technology, this application proposes a dedicated axial flow pump.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a dedicated axial flow pump for liquid metal, thereby overcoming the defects in the prior art.

[0006] To achieve the above objectives, this utility model provides a dedicated axial flow pump for liquid metal, comprising a housing and an inner rotor of a motor disposed within the housing. The housing has an inlet and an outlet, and the inner rotor of the motor has a liquid flow channel connecting the inlet and outlet. An impeller is provided on the wall of the liquid flow channel. An outer stator of the motor is disposed outside the inner rotor of the motor, and a radiator is disposed outside the outer stator of the motor. A sealing gap is provided between the inner rotor of the motor and the housing, and a supporting bearing is disposed within the sealing gap. The sealing gap is an open structure.

[0007] Furthermore, as a preferred embodiment, the housing includes a first housing and a second housing, with the motor rotor enclosed within the first and second housings. The first housing is provided with a liquid inlet, and the second housing is provided with a liquid outlet.

[0008] Furthermore, as a preferred embodiment, a sealing gap is provided between the inner rotor of the motor and the first housing and the second housing, and the sealing gap is an open structure.

[0009] Furthermore, preferably, the housing is provided with a mounting portion.

[0010] Furthermore, as a preferred embodiment, the first housing and the second housing are respectively clamped at both ends of the outer stator of the motor.

[0011] Furthermore, preferably, the heat sink is located between the first housing and the second housing and is exposed to the outside.

[0012] Furthermore, preferably, the diameter of the inlet is larger than the diameter of the outlet.

[0013] Furthermore, as a preferred embodiment, the housing and impeller are injection molded from PFA, PPS or PTFE materials.

[0014] Furthermore, as a preferred embodiment, the axial flow pump has an overall hub-shaped structure.

[0015] Furthermore, as a preferred embodiment, the impeller is provided with at least one ring along the wall of the liquid flow channel.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model provides a liquid flow channel inside the rotor of the motor, with the liquid inlet, liquid flow channel and liquid outlet on the same axis, eliminating the need for an additional rotating shaft. The structure is simple, compact and occupies little space.

[0018] When this invention is in operation, liquid metal enters the sealing gap, and the liquid metal squeezes the support bearing to form a dynamic seal, so that the rotor inside the motor is sealed in the integral pipe formed by the liquid inlet, liquid flow channel and liquid outlet. Compared with mechanical seals, it is less prone to wear and leakage problems and has a better sealing effect.

[0019] This invention achieves sealing by introducing liquid metal into the sealing gap, while the liquid metal also lubricates the supporting bearing. No additional grease, lubricating oil, or other lubricating materials are needed, and there is no cross-contamination, thus resulting in a better sealing effect.

[0020] The housing of this utility model is composed of a first housing and a second housing, making assembly and disassembly more convenient. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a special axial flow pump for liquid metal according to this utility model;

[0022] Figure 2 This is a front view of a liquid metal-specific axial flow pump according to this utility model;

[0023] Figure 3 , Figure 4This is an exploded view of a liquid metal-specific axial flow pump according to the present invention.

[0024] Figure 5 This is a cross-sectional view of a liquid metal-specific axial flow pump according to the present invention.

[0025] Figure 6 For the present utility model Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 For the present utility model Figure 5 Enlarged view of point B in the middle;

[0027] Reference numerals: 1-Housing, 11-First housing, 12-Second housing, 13-Mounting part, 14-Slot, 2-Inner rotor of motor, 21-Liquid flow channel, 22-Impeller, 3-Liquid inlet, 4-Liquid outlet, 5-Outer stator of motor, 6-Radiator, 7-Sealing gap, 8-Support bearing. Detailed Implementation

[0028] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0029] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0030] Example 1:

[0031] like Figures 1-7 As shown, a special axial flow pump for liquid metal includes a housing 1 and an inner rotor 2 of a motor disposed within the housing 1. The housing 1 has an inlet 3 and an outlet 4. The inner rotor 2 of the motor has a liquid flow channel 21 that passes through the inlet 3 and the outlet 4. An impeller 22 is provided on the wall of the liquid flow channel 21. An outer stator 5 of the motor is provided outside the inner rotor 2. A radiator 6 is provided outside the outer stator 5. A sealing gap 7 is provided between the inner rotor 2 of the motor and the housing 1. A support bearing 8 is provided within the sealing gap 7. The sealing gap 7 is an open structure.

[0032] In this embodiment, as a specific solution, the housing 1 includes a first housing 11 and a second housing 12. The motor rotor 2 is enclosed in the first housing 11 and the second housing 12. The first housing 11 is provided with a liquid inlet 3, and the second housing 12 is provided with a liquid outlet 4.

[0033] In this embodiment, as a specific solution, a sealing gap 7 is provided between the inner rotor 2 of the motor and the first housing 11 and the second housing 12, respectively, and the sealing gap 7 is an open structure.

[0034] In this embodiment, as a more specific solution, the open structure, namely the sealing gap 7 between the inner rotor 2 of the motor and the first housing 11, connects the liquid inlet 2 and the liquid flow channel 21, and the sealing gap 7 between the inner rotor 2 of the motor and the second housing 12 connects the liquid outlet 4 and the liquid flow channel 21.

[0035] In this embodiment, as a more specific solution, the diameter of the support bearing 8 can be such that it fits exactly with the outer wall of the inner rotor 2 of the motor and the inner wall of the first housing 11; or it can fit exactly with the outer wall of the inner rotor 2 of the motor and the inner wall of the second housing 12; but the cross-sectional area of ​​the sealing gap 7 is larger than the cross-sectional area of ​​the support bearing 8 to ensure that the sealing gap 7 is in an open state.

[0036] In this embodiment, as a specific solution, the housing 1 is provided with a mounting part 13. More specifically, the mounting part 13 can be in the form of a bracket or the like. The mounting part 13 is provided on the first housing 11 or the second housing 12, or both the first housing 11 and the second housing 12 are provided with the mounting part 13. In this embodiment, the mounting part 13 is provided on the first housing 11 as an example. The mounting part 13 is used to install the axial flow pump as a whole onto the workbench or other equipment.

[0037] In this embodiment, as a specific solution, the first housing 11 and the second housing 12 are respectively clamped at both ends of the outer stator 5 of the motor.

[0038] In this embodiment, as a more specific solution, both the first housing 11 and the second housing 12 are provided with a slot 14 structure, which clamps the outer stator 5 of the motor from both ends.

[0039] In this embodiment, as a specific solution, the radiator 6 is located between the first housing 11 and the second housing 12 and is exposed to the outside; more specifically, the radiator 6 has an annular grid structure.

[0040] In this embodiment, as a specific solution, the diameter of the inlet 3 is larger than the diameter of the outlet 4; the liquid metal enters the inlet 3 and is sheared by the impeller 22 on the wall of the liquid flow channel 21 to generate suction force before flowing out from the outlet 4. The outlet 4 has a smaller diameter, which is more conducive to the smooth flow of liquid.

[0041] In this embodiment, as a specific solution, the housing 1 and the impeller 22 are injection molded from PFA, PPS or PTFE materials, or can be made of stainless steel.

[0042] In this embodiment, as a specific solution, the axial flow pump has an overall hub-shaped structure.

[0043] In this embodiment, as a more specific solution, the impeller 22 is provided with at least one ring along the wall of the liquid flow channel.

[0044] The working principle of this utility model is as follows:

[0045] During operation, the external power drives the rotor 2 inside the motor to rotate, which in turn drives the impeller 22 to rotate. The rotation of the impeller 22 generates a suction force. After the liquid metal enters the inlet 3, it reaches the liquid flow channel 21 and is sent out from the outlet 4 under the action of the suction force. During this process, the liquid metal enters the sealing gap 7 and squeezes the support bearing 8, thereby forming a dynamic seal on the entire rotor 2 inside the motor.

[0046] This utility model has the following advantages:

[0047] 1. This utility model has a liquid flow channel set inside the rotor of the motor. The liquid inlet, liquid flow channel and liquid outlet are on the same axis. No additional rotating shaft is required. The structure is simple, compact and occupies little space.

[0048] 2. When this utility model is working, liquid metal enters the sealing gap, and the liquid metal squeezes the support bearing to form a dynamic seal, so that the rotor inside the motor is sealed in the integral pipe formed by the liquid inlet, liquid flow channel and liquid outlet. Compared with mechanical seals, it is less prone to wear and leakage problems and has a better sealing effect.

[0049] 3. This utility model achieves sealing by introducing liquid metal into the sealing gap, while the liquid metal also lubricates the supporting bearing. No additional grease, lubricating oil or other lubricating materials are needed, and there is no cross-contamination. Therefore, the sealing effect is better.

[0050] 4. The housing of this utility model is composed of a first housing and a second housing, making assembly and disassembly more convenient.

[0051] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A liquid metal dedicated axial flow pump characterized by: The device includes a housing and an inner rotor of a motor disposed within the housing. The housing has a liquid inlet and a liquid outlet. The inner rotor of the motor has a liquid flow channel that connects the liquid inlet and the liquid outlet. An impeller is provided on the wall of the liquid flow channel. An outer stator of the motor is disposed outside the inner rotor of the motor. A radiator is disposed outside the outer stator of the motor. A sealing gap is provided between the inner rotor of the motor and the housing. A sealing support bearing is disposed within the sealing gap. The sealing gap has an open structure.

2. A special axial flow pump for liquid metal according to claim 1, characterized in that: The housing includes a first housing and a second housing. The internal rotor of the motor is enclosed within the first housing and the second housing. The first housing is provided with a liquid inlet, and the second housing is provided with a liquid outlet.

3. A special axial flow pump for liquid metal according to claim 2, characterized in that: The motor has sealing gaps between its inner rotor and the first and second housings, and these sealing gaps are open structures.

4. The axial flow pump of claim 1, wherein: The housing is provided with a mounting section.

5. A special axial flow pump for liquid metal according to claim 2, characterized in that: The first housing and the second housing are respectively clamped at both ends of the outer stator of the motor.

6. A special axial flow pump for liquid metal according to claim 5, characterized in that: The heat sink is located between the first housing and the second housing and is exposed.

7. The axial flow pump of claim 1, wherein: The diameter of the inlet is larger than the diameter of the outlet.

8. The axial flow pump of claim 1, wherein: The housing and impeller are injection molded from PFA, PPS or PTFE materials.

9. The axial flow pump of claim 1, wherein: The axial flow pump has an overall hub-shaped structure.

10. The axial flow pump of claim 1, wherein: The impeller is provided with at least one ring along the wall of the liquid flow channel.

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