Lubrication and cooling structure for a magnetic pump
By introducing a cooling supply box and a flow guide pipe structure into the magnetic pump, and utilizing the coolant circulation path and the flow guide plate to constrain the flow, the problem of magnet demagnetization of the magnetic steel at high temperatures is solved, achieving stable cooling and lubrication, and ensuring the normal operation of the magnetic pump under harsh working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI YANCHANG CHINACOAL YULIN ENERGY CHEM
- Filing Date
- 2025-06-25
- Publication Date
- 2026-06-09
AI Technical Summary
Existing magnetic pumps are prone to magnetization loss under high temperature conditions, which can damage the pump and prevent it from working properly.
A magnetic pump lubrication and cooling structure was designed, including a cooling supply box, a first through pipe, a second through pipe, a guide pipe, and a guide plate. The magnetic drive is lubricated and cooled through the coolant circulation path. The guide plate is used to constrain the flow path of the coolant to increase flow resistance and turbulence, thereby improving the cooling effect.
It effectively reduces friction, wear, and heat, ensuring stable operation of the magnetic pump under high temperature and pressure, preventing magnet demagnetization, and maintaining performance output.
Smart Images
Figure CN224339216U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of shaftless magnetic pump technology, and in particular to a lubrication and cooling structure for a magnetic pump. Background Technology
[0002] A magnetic pump (also known as a magnetically driven pump) mainly consists of several parts, including a pump head, a magnetic actuator (magnetic cylinder), a motor, and a base. The magnetic actuator of the magnetic pump consists of an outer magnetic rotor, an inner magnetic rotor, and a non-magnetic isolation sleeve.
[0003] In existing technology, magnetic pumps use an internal circulation system to introduce the medium from the pump chamber into the inner cavity of the isolation sleeve to cool the main shaft sliding bearing, the isolation sleeve, and the inner magnet rotor. However, the rotor is directly affected by the temperature of the medium, and the magnets of the rotor have a limited ability to withstand high temperatures. When the temperature becomes too high and exceeds the temperature tolerance of the magnets, the magnets will rapidly demagnetize and lose their magnetism, causing damage to the magnetic pump and rendering it inoperable.
[0004] Therefore, there is an urgent need for a magnetic pump lubrication and cooling structure to solve the above problems. Utility Model Content
[0005] This application provides a magnetic pump lubrication and cooling structure to ensure stable operation of the pump body while providing good cooling and heat dissipation for the magnetic drive.
[0006] To address the above objectives, this application provides the following technical solution:
[0007] A magnetic pump lubrication and cooling structure includes a main shaft, a pump body, an impeller, a pump cover, an inner magnetic cylinder, an isolation sleeve, and an outer magnetic cylinder. The pump body, impeller, pump cover, inner magnetic cylinder, isolation sleeve, and outer magnetic cylinder are coaxially arranged on the main shaft along the transmission direction. It also includes a cooling supply box, a first through pipe, a second through pipe, a guide pipe, and a guide plate.
[0008] The cooling supply box is located on one side of the pump body;
[0009] One end of the first pipe is connected to the liquid outlet of the closed chamber formed by the outer side of the inner magnetic cylinder and the pump body, and the other end is connected to the periphery of the cooling supply box.
[0010] One end of the second pipe is connected to the liquid inlet of the closed chamber formed by the outer side of the inner magnetic cylinder and the pump body, and the other end is connected to the periphery of the cooling supply box.
[0011] One end of the guide pipe is connected to one working end of the pump body, and the other end is connected to the cooling supply box;
[0012] The spiral-structured guide plate is rotatably disposed inside the guide tube to constrain the flow path within the guide tube.
[0013] Furthermore, the guide tube includes an inner tube and an outer tube, the outer tube is sleeved around the periphery of the inner tube and spaced apart from the inner tube, and the cavity of the inner tube is connected to the cavity of the outer tube; the guide plate is disposed between the inner tube and the outer tube and is rotatably connected to the outer wall of the outer tube.
[0014] Furthermore, both the upstream section of the first connecting pipe connected to the pump body and the downstream section of the second connecting pipe connected to the pump body are fixedly provided with annular plates. The annular plates are provided with multiple guide grooves at intervals along the inner diameter of the side plate near the pump body and the outer diameter of the side plate away from the pump body.
[0015] Furthermore, the openings of the plurality of guide grooves are oriented toward the axial direction of the annular plate, forming a vortex-like flow path.
[0016] Furthermore, a vent pipe is provided around the cooling supply box, with one end of the vent pipe extending into the interior of the cooling supply box and the other end communicating with the external environment.
[0017] Furthermore, the guide plate is made of a non-magnetic material.
[0018] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:
[0019] In this application, the coolant flows back to the cooling supply tank through the first pipe, and the fresh coolant in the cooling supply tank is pumped into the closed chamber through the second pipe for lubrication and cooling. The guide pipe is set at the working end of the pump body to form an additional coolant circulation path, reducing wear and heat caused by friction. The guide plate constrains and changes the flow path of the coolant in the guide pipe, increasing flow resistance and turbulence, thereby improving the cooling effect. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure provided for an embodiment of this application;
[0022] Figure 2 This is a schematic diagram of the structure of the annular plate provided in an embodiment of this application;
[0023] Figure 3 This is a schematic diagram of the structure of the guide tube provided in an embodiment of this application.
[0024] Icons: 1-Main shaft; 2-Pump body; 3-Impeller; 4-Pump cover; 5-Inner magnetic cylinder; 6-Isolation sleeve; 7-Outer magnetic cylinder; 10-Cooling supply box; 11-First through pipe; 12-Second through pipe; 13-Annular plate; 131-Guide groove; 14-Vent pipe; 20-Guide pipe; 21-Inner pipe; 22-Outer pipe; 23-Guide plate. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.
[0026] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.
[0027] Combination Figures 1-3As shown, a magnetic pump lubrication and cooling structure includes a main shaft 1, a pump body 2, an impeller 3, a pump cover 4, an inner magnetic cylinder 5, an isolation sleeve 6, and an outer magnetic cylinder 7. The pump body 2, impeller 3, pump cover 4, inner magnetic cylinder 5, isolation sleeve 6, and outer magnetic cylinder 7 are coaxially arranged along the transmission direction on the main shaft 1. It also includes a cooling supply box 10, a first through pipe 11, a second through pipe 12, a guide pipe 20, and a guide plate 23. The cooling supply box 10 is located on one side of the pump body 2. One end of the first through pipe 11 is connected to the outside of the inner magnetic cylinder 5, forming a connection with the pump body 2. The liquid outlet of the closed chamber is connected to the periphery of the cooling supply tank 10 at the other end; one end of the second pipe 12 is connected to the liquid inlet of the closed chamber formed by the inner magnetic cylinder 5 and the pump body 2 at the outside, and the other end is connected to the periphery of the cooling supply tank 10; one end of the guide pipe 20 is connected to one working end of the pump body 2, and the other end is connected to the cooling supply tank 10; the spiral guide plate 23 is rotatably disposed inside the guide pipe 20 to constrain the flow path inside the guide pipe 20.
[0028] The cooling supply box 10 in this application serves as a medium for storing and / or transporting the cooling medium. The cooling supply box 10 in this application can be any independent box, such as a wind box or a water tank, and the medium in the water tank can be any one of water, oil, or the medium transported by the pump body 2.
[0029] In the above scheme, the cooling supply tank 10, serving as the storage and supply source of coolant, is located on one side of the pump body 2. The first connecting pipe 11 (outlet connection pipe) connects the outlet of the closed chamber formed by the inner magnetic cylinder 5 and the pump body 2 to the cooling supply tank 10. When the coolant in the closed chamber needs to be discharged, it flows back to the cooling supply tank 10 through the first connecting pipe 11. The second connecting pipe 12 (inlet connection pipe) connects the inlet of the closed chamber formed by the inner magnetic cylinder 5 and the pump body 2 to the cooling supply tank 10. Fresh coolant in the cooling supply tank 10 is pumped into the closed chamber through the second connecting pipe 12 for lubrication and cooling. One end of the guide pipe 20 is connected to the working end of the pump body 2, and the other end is connected to the cooling supply tank 10, forming an additional coolant circulation path at the working end of the pump body 2, reducing wear and heat generated by friction. The spiral-structured guide plate 23 rotates inside the guide tube 20 to constrain and change the flow path of the coolant within the guide tube 20, increasing flow resistance and turbulence, thereby improving the cooling effect and ensuring that the magnetic pump can maintain stable performance output under harsh conditions such as high temperature and high pressure.
[0030] The guide tube 20 includes an inner tube 21 and an outer tube 22. The outer tube 22 is sleeved around the periphery of the inner tube 21 and spaced apart from the inner tube 21. The cavity of the inner tube 21 is connected to the cavity of the outer tube 22. The guide plate 23 is disposed between the inner tube 21 and the outer tube 22 and is rotatably connected to the outer wall of the outer tube 22.
[0031] In the above scheme, the guide pipe 20 is designed to include two parts: an inner pipe 21 and an outer pipe 22. The cavity of the inner pipe 21 and the cavity of the outer pipe 22 are interconnected, forming an annular fluid channel. When the magnetic pump starts running, the coolant is pumped from the cooling supply tank 10 through the second pipe 12 into the closed chamber formed by the inner magnetic cylinder 5 and the pump body 2, cooling the inner magnetic cylinder 5 and the pump body 2. At the same time, some coolant directly enters the cavity of the inner pipe 21 of the guide pipe 20 from the working end of the pump body 2. When the coolant flows through the annular channel between the inner pipe 21 and the outer pipe 22, it is guided and constrained by the guide plate 23 and flows along a spiral path, which not only increases the flow resistance and turbulence of the coolant in the guide pipe 20, but also enables the coolant to more effectively remove the heat inside the magnetic pump.
[0032] The upstream section of the first through pipe 11 connected to the pump body 2 and the downstream section of the second through pipe 12 connected to the pump body 2 are both fixedly provided with annular plates 13. The annular plates 13 are provided with a plurality of guide grooves 131 at intervals along the inner diameter of the side plate surface near the pump body 2 and the outer diameter of the side plate surface away from the pump body 2.
[0033] In the above scheme, when the coolant flows from the cooling supply tank 10 to the pump body 2 through the first pipe 11, it first encounters the annular plate 13 in the upstream section. The guide grooves 131 on the annular plate 13 guide the coolant to flow along a specific path, increasing the turbulence of the coolant and making it more evenly distributed near the inlet of the pump body 2. Similarly, when the coolant flows out from the outlet of the pump body 2 and returns to the cooling supply tank 10 through the second pipe 12, the guide grooves 131 on the annular plate 13 again guide and constrain the coolant, improving the heat exchange efficiency of the coolant and ensuring that more heat is carried away.
[0034] The openings of the plurality of flow guide grooves 131 face the axial direction of the annular plate 13 and form a vortex-shaped flow path.
[0035] In the above scheme, because the slot faces the axis, the coolant will form a vortex structure during flow. That is, the coolant forms one or more rotating fluid rings around the annular plate 13 to increase the turbulence of the coolant, allowing it to better exchange heat with the pump body 2 and its internal components. Furthermore, the vortex can generate a certain centrifugal force, pushing the coolant towards the outer edge of the annular plate 13, thereby increasing the contact area between the coolant and the pump body 2 and improving heat exchange efficiency.
[0036] A vent pipe 14 is provided around the cooling supply box 10. One end of the vent pipe 14 extends into the interior of the cooling supply box 10, and the other end is connected to the external environment.
[0037] In the above scheme, during the operation of the magnetic pump, due to the circulation of coolant and the possible generation of gases (such as air, water vapor, etc.) inside the pump body 2, these gases will gradually accumulate in the cooling supply tank 10. The vent pipe 14 allows the accumulated gas to be discharged to the external environment, thereby maintaining the pressure balance inside the cooling supply tank 10 and the normal circulation of coolant, and preventing damage to the magnetic pump or cooling system caused by excessively high or low pressure inside the first pipe 11, second pipe 12, third pipe, cooling supply tank 10, and / or pump body 2.
[0038] The guide plate 23 is made of a non-magnetic material. This design ensures that the magnetic lines of force are transmitted mainly along the air gap between the inner and outer magnetic rotors, preventing the guide plate 23 from becoming an extra path for the magnetic lines of force, reducing interference with the internal magnetic field distribution of the magnetic pump, and thus enabling the magnetic pump to maintain stable performance output even under harsh conditions such as high temperature and high pressure.
[0039] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.
[0040] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.
Claims
1. A magnetic pump lubrication and cooling structure, comprising a main shaft (1), a pump body (2), an impeller (3), a pump cover (4), an inner magnetic cylinder (5), an isolation sleeve (6), and an outer magnetic cylinder (7), wherein the pump body (2), impeller (3), pump cover (4), inner magnetic cylinder (5), isolation sleeve (6), and outer magnetic cylinder (7) are coaxially arranged along the transmission direction on the main shaft (1), characterized in that, It also includes a cooling supply box (10), a first through pipe (11), a second through pipe (12), a guide pipe (20), and a guide plate (23); The cooling supply box (10) is located on one side of the pump body (2); One end of the first pipe (11) is connected to the liquid outlet of the closed chamber formed by the outer side of the inner magnetic cylinder (5) and the pump body (2), and the other end is connected to the periphery of the cooling supply box (10). One end of the second pipe (12) is connected to the liquid inlet of the closed chamber formed by the outer side of the inner magnetic cylinder (5) and the pump body (2), and the other end is connected to the periphery of the cooling supply box (10). One end of the guide pipe (20) is connected to one working end of the pump body (2), and the other end is connected to the cooling supply box (10); The spiral structure of the guide plate (23) is rotatably disposed inside the guide tube (20) to constrain the flow path inside the guide tube (20).
2. The magnetic pump lubrication and cooling structure according to claim 1, characterized in that, The guide tube (20) includes an inner tube (21) and an outer tube (22). The inner tube (21) and the outer tube (22) are coaxially spaced apart, and the lumen of the inner tube (21) is connected to the lumen of the outer tube (22). The guide plate (23) is disposed between the inner tube (21) and the outer tube (22) and is rotatably connected to the outer wall of the inner tube (21).
3. The magnetic pump lubrication and cooling structure according to claim 1, characterized in that, The upstream section of the first through pipe (11) connected to the pump body (2) and the downstream section of the second through pipe (12) connected to the pump body (2) are both fixedly provided with annular plates (13). The annular plates (13) are provided with multiple guide grooves (131) at intervals along the inner diameter of the side plate near the pump body (2) and the outer diameter of the side plate away from the pump body (2).
4. The magnetic pump lubrication and cooling structure according to claim 3, characterized in that, The openings of the multiple guide grooves (131) are all oriented toward the axial direction of the ring plate (13) and form a vortex-shaped flow path.
5. The magnetic pump lubrication and cooling structure according to claim 1, characterized in that, The cooling supply box (10) is provided with a vent pipe (14) on its periphery. One end of the vent pipe (14) extends into the interior of the cooling supply box (10), and the other end is connected to the external environment.
6. The magnetic pump lubrication and cooling structure according to claim 1, characterized in that, The guide plate (23) is made of a non-magnetic material.