Permanent magnet heat exchanger for improving heat transfer coefficient and manufacturing method thereof

Abstract

The present invention relates to a permanent magnet heat exchanger and a manufacturing method thereof which is beneficial to improving the heat exchange coefficient. The invention belongs to the technical field of heat exchangers, and includes an upper half assembly of a heat exchanger and a lower half assembly of a heat exchanger. The lower half assembly of the heat exchanger is provided with a cooling water pipe connected to the lower half assembly of the heat exchanger, and a plurality of heat sinks sleeved with the cooling water pipe are provided at both ends of the lower half assembly of the heat exchanger. The upper half assembly of the heat exchanger includes an upper half shell of the heat exchanger, an inner shaft connected to the lower half assembly of the heat exchanger is provided in the upper half shell of the heat exchanger, an external impeller movably nested with the upper half shell of the heat exchanger is provided at the upper end of the upper half shell of the heat exchanger, an external magnetic rotor nested with the external impeller is provided between the external impeller and the upper half shell of the heat exchanger, and an internal magnetic rotor nested with the inner shaft and magnetically cut-transmitted with the external magnetic rotor is provided between the inner shaft and the upper half shell of the heat exchanger. The forced movement of the medium to be cooled is realized, the heat dissipation effect of the radiator is greatly enhanced, and its heat exchange coefficient is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and in particular to a permanent magnet heat exchanger which is beneficial to improving a heat transfer coefficient and a manufacturing method thereof. Background Art

[0002] Permanent magnet transmission is a revolution in the history of transmission. Its simple structure, reliable operation, energy saving and consumption reduction are well applied in modern industry. It is mainly used in energy saving of motor drive systems in industries such as petroleum, petrochemical, electric power, mining, steel, chemical, cement, etc. There are usually only two means to enhance heat transfer technology: increasing the heat transfer area and improving the heat transfer coefficient. At present, the use of spoiler holes, corona wind, longitudinal vortex and other means has become a research hotspot in the field of engineering thermal physics. Summary of the invention

[0003] The present invention mainly solves the shortcomings of the prior art, such as poor heat dissipation performance, low operating stability and short service life, and provides a permanent magnet heat exchanger and a manufacturing method thereof that are beneficial to improving the heat transfer coefficient. The rotating magnetic field formed by the annular arrangement of permanent magnet steel sheets and the "magnetic circuit push-pull" principle are adopted to realize the forced movement of the medium to be cooled. Combined with a certain turbulence design, the destruction of the laminar boundary layer on the heat exchange surface and the generation of the turbulent boundary layer can be promoted, and its natural convection heat dissipation state can be changed, and the laminar flow near the heat sink can be converted into turbulent flow, which greatly enhances the heat dissipation effect of the radiator and improves its heat transfer coefficient.

[0004] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0005] A permanent magnet heat exchanger that is beneficial to improving the heat exchange coefficient includes an upper half assembly of a heat exchanger and a lower half assembly of a heat exchanger, wherein the lower half assembly of the heat exchanger is provided with a cooling water pipe connected to the lower half assembly of the heat exchanger, and the two ends of the lower half assembly of the heat exchanger are provided with a plurality of heat sinks that are sleeved with the cooling water pipe. The upper half assembly of the heat exchanger includes an upper half shell of the heat exchanger, wherein the upper half shell of the heat exchanger is provided with an inner shaft connected to the lower half assembly of the heat exchanger, and the upper end of the upper half shell of the heat exchanger is provided with an external impeller that is movably nested with the upper half shell of the heat exchanger, and an external magnetic rotor that is nested with the external impeller is provided between the external impeller and the upper half shell of the heat exchanger, and an internal magnetic rotor that is nested with the inner shaft and is magnetically cut and driven with the external magnetic rotor is provided between the inner shaft and the upper half shell of the heat exchanger.

[0006] Preferably, the lower half assembly of the heat exchanger comprises a lower half shell of the heat exchanger which is through-sheathed with the inner shaft, a plurality of internal impellers which are distributed in an annular manner with equal intervals and are integrally welded with the inner shaft are arranged inside the lower half shell of the heat exchanger and between the inner shaft, and the lower half shell of the heat exchanger is connected to the cooling water pipe.

[0007] Preferably, one end of the upper shell of the heat exchanger is an integrated vertical structure with the lower shell of the heat exchanger, the other end of the upper shell of the heat exchanger is provided with a rear pressure cover that is integrated and sealed with the upper shell of the heat exchanger, and the other end of the lower shell of the heat exchanger is provided with a front pressure cover that is integrated and sealed with the lower shell of the heat exchanger.

[0008] Preferably, the external magnetic rotor comprises a plurality of external magnetic permanent magnetic steel sheets distributed in an annular structure and arranged alternately along the circumferential N and S poles.

[0009] Preferably, the inner magnetic rotor comprises a plurality of inner magnetic permanent magnetic steel sheets distributed in an annular structure and arranged alternately along the circumferential N and S poles.

[0010] Preferably, one end of the external impeller is plug-fitted and fixed to the upper shell of the heat exchanger, and the other end of the external impeller is provided with an external magnetic rotor limit cover which is plug-fitted and fixed to the upper shell of the heat exchanger.

[0011] Preferably, a plurality of radiator tubes are provided between two adjacent radiator fins.

[0012] Preferably, the method for manufacturing a permanent magnet heat exchanger that is beneficial to improving the heat transfer coefficient comprises the following steps:

[0013] The first step: first weld the notched groove of the cooling water pipe to the lower shell of the heat exchanger, then connect the inner shaft to the upper shell of the heat exchanger to complete the plugging of the lower shell of the heat exchanger, and then complete the coaxial shell integration welding process of the lower shell of the heat exchanger and the upper shell of the heat exchanger.

[0014] Step 2: Pull out the inner shaft, sleeve the inner magnetic rotor, and then insert the inner shaft into the upper shell of the heat exchanger. Then, complete the positioning welding process of the internal impeller and the inner shaft in the lower shell of the heat exchanger.

[0015] Step 3: Sleeve the external magnetic rotor on the inner wall of the external impeller, then sleeve the external impeller with the external magnetic rotor with the upper shell of the heat exchanger, and then use the external magnetic rotor limit cover to complete the axial sliding limit of the external impeller.

[0016] Step 4: The rear gland is fixed by bolting or welding at the tail end of the upper shell of the heat exchanger, and the front gland is fixed by bolting or welding at the front end of the lower shell of the heat exchanger.

[0017] Step 5: Install several radiating fins that are heat-conductively fitted with the cooling water pipes on both sides of the lower shell of the heat exchanger, and insert several radiating fin tubes between two adjacent radiating fins to fix them and increase the heat dissipation effect.

[0018] Preferably, the outer magnetic rotor uses a number of outer magnetic permanent magnetic steel sheets spliced ​​and distributed in a ring shape, and the inner magnetic rotor uses a number of inner magnetic permanent magnetic steel sheets spliced ​​and distributed in a ring shape, the number of splicing of the inner magnetic permanent magnetic steel sheets and the outer magnetic permanent magnetic steel sheets is the same, the joints of the inner magnetic permanent magnetic steel sheets and the center lines of the outer magnetic permanent magnetic steel sheets are on the same central axis, and both use permanent magnet steel made of rare earth permanent magnetic materials, and the magnetic steel is alternately arranged along the circumferential N and S poles to form a rotating magnetic field. The inner magnetic permanent magnetic steel sheets and the outer magnetic permanent magnetic steel sheets are both glued into a ring structure with adhesive.

[0019] Preferably, when cooling water flows from the cooling water pipe through the internal impeller, the internal impeller rotates, and at the same time drives the inner shaft and the coaxial internal magnetic rotor to rotate to form a rotating magnetic field. The outer magnetic rotor rotates under the action of magnetic drag, and the external impeller is driven and forces the nearby fluid to be cooled to flow. After flowing through the spoiler column, turbulence is promoted and the convection of cold and hot fluids in the area to be cooled is forced to be enhanced, which will greatly enhance the heat dissipation effect of the radiator and improve its heat transfer coefficient.

[0020] The present invention can achieve the following effects:

[0021] The present invention provides a permanent magnet heat exchanger and a manufacturing method thereof which are beneficial to improving the heat transfer coefficient. Compared with the prior art, a rotating magnetic field formed by an annular arrangement of permanent magnet steel sheets and the principle of "magnetic circuit push-pull" are adopted to realize the forced movement of the medium to be cooled. Combined with a certain turbulence design, the destruction of the laminar boundary layer on the heat exchange surface and the generation of a turbulent boundary layer can be promoted, and its natural convection heat dissipation state can be changed, and the laminar flow near the heat sink is converted into turbulent flow, which greatly enhances the heat dissipation effect of the radiator and improves its heat transfer coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is the side structural section view of the present invention.

[0024] Figure 3 It is a front view structural schematic diagram of the present invention.

[0025] Figure 4 It is a schematic diagram of the structure of the outer magnetic rotor and the inner magnetic rotor in the present invention.

[0026] In the figure: upper half assembly 1 of heat exchanger, lower half assembly 2 of heat exchanger, heat sink 3, cooling water pipe 4, rear pressure cover 5, external magnetic rotor limit cover 6, external impeller 7, external magnetic rotor 8, upper half shell of heat exchanger 9, lower half shell of heat exchanger 10, internal impeller 11, front pressure cover 12, inner shaft 13, inner magnetic rotor 14, heat sink tube 15, external permanent magnetic steel sheet 16, internal permanent magnetic steel sheet 17. DETAILED DESCRIPTION

[0027] The technical solution of the invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0028] Example: Figure 1-4 As shown, a permanent magnet heat exchanger that is beneficial to improving the heat transfer coefficient includes a heat exchanger upper half assembly 1 and a heat exchanger lower half assembly 2. The heat exchanger lower half assembly 2 is provided with a cooling water pipe 4 connected to the heat exchanger lower half assembly 2. Seven heat sinks 3 that are sleeved with the cooling water pipe 4 are provided at both ends of the heat exchanger lower half assembly 2. Fifteen heat sink tubes 15 are provided between two adjacent heat sinks 3. The heat exchanger upper half assembly 1 includes a heat exchanger upper half shell 9. The heat exchanger upper half shell 9 is provided with an inner shaft 13 that is connected to the heat exchanger lower half assembly 2. The upper end of the heat exchanger upper half shell 9 is provided with an external impeller 7 that is movably nested and connected to the heat exchanger upper half shell 9. One end of the external impeller 7 is inserted and fixedly sleeved with the heat exchanger upper half shell 9. The other end of the external impeller 7 is provided with an external magnetic rotor limit cover 6 that is sleeved with the heat exchanger upper half shell 9 and inserted and fixedly connected with the external impeller 7. An external magnetic rotor 8 is provided between the external impeller 7 and the upper half shell 9 of the heat exchanger, and is nested and connected with the external impeller 7. The external magnetic rotor 8 includes 12 external magnetic permanent magnetic steel sheets 16 distributed in an annular structure and arranged alternately along the circumferential N and S poles. An internal magnetic rotor 14 is provided between the inner shaft 13 and the upper half shell 9 of the heat exchanger, and is nested and connected with the inner shaft 13 and is magnetically cut and driven with the external magnetic rotor 8. The internal magnetic rotor 14 includes 12 internal magnetic permanent magnetic steel sheets 17 distributed in an annular structure and arranged alternately along the circumferential N and S poles. The lower half assembly 2 of the heat exchanger includes a lower half shell 10 of the heat exchanger that is through-type sleeved with the inner shaft 13. Six internal impellers 11 are arranged in an annular distribution with equal spacing and are integrally welded with the inner shaft 13 in the lower half shell 10 of the heat exchanger and between the inner shaft 13. The lower half shell 10 of the heat exchanger is connected with the cooling water pipe 4. One end of the upper shell 9 of the heat exchanger is an integrated vertical structure with the lower shell 10 of the heat exchanger, the other end of the upper shell 9 of the heat exchanger is provided with a rear pressure cover 5 which is an integrated and sealed type with the upper shell 9 of the heat exchanger, and the other end of the lower shell 10 of the heat exchanger is provided with a front pressure cover 12 which is an integrated and sealed type with the lower shell 10 of the heat exchanger.

[0029] A method for manufacturing a permanent magnet heat exchanger that is beneficial to improving the heat transfer coefficient comprises the following steps:

[0030] The first step: first, the cooling water pipe 4 is notched and welded to the lower half shell 10 of the heat exchanger, and then the inner shaft 13 cooperates with the upper half shell 9 of the heat exchanger to complete the plugging with the lower half shell 10 of the heat exchanger. At this time, the coaxial shell integration welding process of the lower half shell 10 of the heat exchanger and the upper half shell 9 of the heat exchanger is completed.

[0031] Step 2: Pull out the inner shaft 13, sleeve the inner magnetic rotor 14, and then insert the inner shaft 13 into the upper half shell 9 of the heat exchanger, and then complete the positioning welding process of the internal impeller 11 and the inner shaft 13 in the lower half shell 10 of the heat exchanger. The inner magnetic rotor 14 uses 12 inner magnetic permanent magnetic steel sheets 17 to be spliced ​​and distributed in an annular shape. The permanent magnet steel is made of rare earth permanent magnetic material, and the magnetic steel is alternately arranged along the circumferential N and S poles to form a rotating magnetic field.

[0032] Step 3: Sleeve the outer magnetic rotor 8 on the inner wall of the outer impeller 7, then sleeve the outer impeller 7 with the outer magnetic rotor 8 with the upper half shell 9 of the heat exchanger, and then use the outer magnetic rotor limit cover 6 to complete the axial sliding limit of the outer impeller 7. The outer magnetic rotor 8 uses 12 pieces of outer magnetic permanent magnetic steel sheets 16 to be spliced ​​and distributed in an annular pattern, and the number of spliced ​​inner magnetic permanent magnetic steel sheets 17 and outer magnetic permanent magnetic steel sheets 16 is the same. The joints of the inner magnetic permanent magnetic steel sheets 17 are on the same central axis as the center line of the outer magnetic permanent magnetic steel sheets 16, and both are permanent magnet steels made of rare earth permanent magnetic materials, and the magnetic steels are alternately arranged along the circumferential N and S poles to form a rotating magnetic field.

[0033] Step 4: The rear gland 5 is fixed in a sealed manner at the rear end of the upper shell 9 of the heat exchanger by bolting or welding, and the front gland 12 is fixed in a sealed manner at the front end of the lower shell 10 of the heat exchanger by bolting or welding.

[0034] Step 5: A plurality of heat sinks 3 are mounted on both sides of the lower half shell 10 of the heat exchanger, and are heat-conductively fitted with the cooling water pipes 4. Fifteen heat sink tubes 15 are inserted between two adjacent heat sinks 3 to fix and increase the heat dissipation effect.

[0035] When cooling water flows from the cooling water pipe 4 through the internal impeller 11, the internal impeller 11 rotates, and at the same time drives the inner shaft 13 and the coaxial inner magnetic rotor 14 to rotate to form a rotating magnetic field. Under the drag of the magnetic force, the outer magnetic rotor 8 rotates, and the external impeller 7 is driven accordingly and forces the nearby fluid to be cooled to flow. After flowing through the spoiler column, turbulence is promoted and the convection effect of the cold and hot fluids in the area to be cooled is forced to be enhanced, which will greatly enhance the heat dissipation effect of the radiator and improve its heat transfer coefficient.

[0036] In summary, the permanent magnet heat exchanger and its manufacturing method, which are beneficial to improving the heat transfer coefficient, adopt the rotating magnetic field formed by the annular arrangement of permanent magnet steel sheets and the "magnetic circuit push-pull" principle to realize the forced movement of the medium to be cooled, and combined with a certain turbulence design, can promote the destruction of the laminar boundary layer on the heat exchange surface and the generation of the turbulent boundary layer, change its natural convection heat dissipation state, and transform the laminar flow near the heat sink into turbulent flow, greatly enhance the heat dissipation effect of the radiator and improve its heat transfer coefficient.

[0037] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A permanent magnet heat exchanger that is beneficial to improving the heat transfer coefficient, characterized in that: The heat exchanger comprises an upper half assembly (1) and a lower half assembly (2), wherein the lower half assembly (2) is provided with a cooling water pipe (4) connected to the lower half assembly (2), and the two ends of the lower half assembly (2) are provided with a plurality of heat sinks (3) sleeved with the cooling water pipe (4); the upper half assembly (1) comprises an upper half shell (9), and the upper half shell (9) is provided with a An inner shaft (13), an upper end of the upper half shell (9) of the heat exchanger is provided with an external impeller (7) movably nested with the upper half shell (9) of the heat exchanger, an external magnetic rotor (8) nested with the external impeller (7) is provided between the external impeller (7) and the upper half shell (9) of the heat exchanger, and an inner magnetic rotor (14) nested with the inner shaft (13) and magnetically cut-drived with the external magnetic rotor (8) is provided between the inner shaft (13) and the upper half shell (9) of the heat exchanger; The lower half assembly (2) of the heat exchanger comprises a lower half shell (10) of the heat exchanger which is sleeved with the inner shaft (13) in a through-type manner. A plurality of internal impellers (11) are arranged between the lower half shell (10) of the heat exchanger and the inner shaft (13) and are distributed in an annular manner with equal spacing and are welded integrally with the inner shaft (13). The lower half shell (10) of the heat exchanger is connected to the cooling water pipe (4). One end of the upper half shell (9) of the heat exchanger is an integrated vertical structure with the lower half shell (10). The other end of the upper half shell (9) of the heat exchanger is provided with a rear pressure cover (5) which is integrated and sealed with the upper half shell (9). The other end of the lower half shell (10) of the heat exchanger is provided with a front pressure cover (12) which is integrated and sealed with the lower half shell (10). The outer magnetic rotor (8) comprises a plurality of outer magnetic permanent magnetic steel sheets (16) distributed in an annular structure and arranged alternately with N and S poles along the circumferential direction; the inner magnetic rotor (14) comprises a plurality of inner magnetic permanent magnetic steel sheets (17) distributed in an annular structure and arranged alternately with N and S poles along the circumferential direction.

2. The permanent magnet heat exchanger for improving heat transfer coefficient according to claim 1, characterized in that: One end of the external impeller (7) is plug-fitted and fixedly connected to the upper shell (9) of the heat exchanger, and the other end of the external impeller (7) is provided with an external magnetic rotor limit cover (6) which is plug-fitted and fixedly connected to the upper shell (9) of the heat exchanger.

3. The permanent magnet heat exchanger for improving heat transfer coefficient according to claim 1, characterized in that: A plurality of radiator tubes (15) are provided between two adjacent radiator fins (3).

4. The method for manufacturing a permanent magnet heat exchanger for improving heat transfer coefficient according to claim 1, characterized in that The steps are as follows: The first step is to firstly weld the cooling water pipe (4) with the lower half shell (10) of the heat exchanger by cutting a notch, and then to connect the inner shaft (13) with the upper half shell (9) of the heat exchanger to the lower half shell (10) of the heat exchanger, thereby completing the coaxial shell integration welding process of the lower half shell (10) of the heat exchanger and the upper half shell (9) of the heat exchanger; Step 2: Pull out the inner shaft (13), sleeve the inner magnetic rotor (14), and then insert the inner shaft (13) into the upper shell (9) of the heat exchanger, and then complete the positioning welding process of the internal impeller (11) and the inner shaft (13) in the lower shell (10) of the heat exchanger; Step 3: The inner wall of the external impeller (7) is sleeved with the external magnetic rotor (8), and then the external impeller (7) with the external magnetic rotor (8) is sleeved with the upper half shell (9) of the heat exchanger in a limiting manner, and then the external magnetic rotor limiting cover (6) is used to complete the axial sliding limiting of the external impeller (7); Step 4: The rear gland (5) is fixed in a sealed manner at the rear end of the upper shell (9) of the heat exchanger by bolting or welding, and the front gland (12) is fixed in a sealed manner at the front end of the lower shell (10) of the heat exchanger by bolting or welding; Step 5: A plurality of heat sinks (3) which are heat-conductively fitted and sleeved with the cooling water pipes (4) are assembled on both sides of the lower half shell (10) of the heat exchanger, and a plurality of heat sink tubes (15) are inserted between two adjacent heat sinks (3) to fix them and increase the heat dissipation effect.

5. The method for manufacturing a permanent magnet heat exchanger that is beneficial to improving the heat transfer coefficient according to claim 4, characterized in that: The outer magnetic rotor (8) uses a plurality of outer magnetic permanent magnetic steel sheets (16) spliced ​​and distributed in a ring shape, and the inner magnetic rotor (14) uses a plurality of inner magnetic permanent magnetic steel sheets (17) spliced ​​and distributed in a ring shape, the number of spliced ​​inner magnetic permanent magnetic steel sheets (17) and the number of spliced ​​outer magnetic permanent magnetic steel sheets (16) are the same, the joints of the inner magnetic permanent magnetic steel sheets (17) and the center lines of the outer magnetic permanent magnetic steel sheets (16) are on the same central axis, and both use permanent magnetic steel made of rare earth permanent magnetic material, and the magnetic steel is alternately arranged along the circumferential N and S poles to form a rotating magnetic field.

6. The method for manufacturing a permanent magnet heat exchanger that is beneficial to improving the heat transfer coefficient according to claim 4, characterized in that: When cooling water flows from the cooling water pipe (4) through the internal impeller (11), the internal impeller (11) rotates, and at the same time drives the internal shaft (13) and the coaxial internal magnetic rotor (14) to rotate to form a rotating magnetic field. Under the drag of the magnetic force, the external magnetic rotor (8) rotates, and the external impeller (7) is driven accordingly and forces the nearby fluid to be cooled to flow. After flowing through the spoiler column, turbulence is promoted and the convection effect of the cold and hot fluids in the cooling area is forced to be enhanced, which will greatly enhance the heat dissipation effect of the radiator and improve its heat transfer coefficient.

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