Flexible connection cooling fan and fuel cell using same

Abstract

The utility model discloses a flexible connection heat dissipation fan and a fuel cell, the flexible connection heat dissipation fan comprises a motor and fan blades, the motor comprises a motor assembly, a load switching assembly and an electric control assembly, the motor assembly comprises a stator assembly, a rotor assembly, a front end cover and a rear end cover, the stator assembly is embedded in the front end cover, and the rotor assembly is embedded in the rear end cover. The rotor assembly is located in the stator assembly, the end of a rotating shaft of the rotor assembly extends out of the front end cover and is provided with a permanent magnet assembly A, and the permanent magnet assembly A is covered with a sealing cover; the load switching assembly comprises a load rotating shaft and a permanent magnet assembly B, the permanent magnet assembly B is close to the sealing cover and corresponds to the permanent magnet assembly A, the front shaft end of the load rotating shaft is connected with the permanent magnet assembly B, and the front shaft end of the load rotating shaft is connected with the fan blades. According to the principle of a permanent magnet coupler, the load rotating shaft rotates along with the rotating shaft through the magnetic field effect of the permanent magnet assembly A and the permanent magnet assembly B, then power is transmitted to the fan blades, the sealing effect of the motor is good, and the service life is long.

Description

Technical Field

[0001] The utility model relates to a flexible connection heat dissipation fan and a fuel cell using the same. Background Art

[0002] A fuel cell is an energy conversion device that generates electricity through the electrochemical reaction of hydrogen and oxygen. It has the advantages of high energy conversion efficiency, simple structure, low noise, and no pollution. In addition to generating electricity and water, a large amount of heat is also released during the reaction of the fuel cell. This heat needs to be dissipated through the cooling system to ensure the normal operation of the fuel cell, and the cooling fan is a major component in the cooling system.

[0003] At present, most of the fans used in the cooling system of fuel cells are low-pressure fans, and the motors are sealed with oil seals. The structure of the heat dissipation fan is as follows: the heat dissipation fan includes a motor and a fan blade. The motor includes a stator, a rotor, a front cover, a rear cover and an electronic control component. The stator is installed in the rear cover, the rotor is sleeved in the stator, the oil seal is installed on the front cover and sleeved on the front shaft end of the rotor, the rotor shaft extends out of the front cover, and the fan blades are installed on the front shaft end of the shaft. After power is turned on, the rotor rotates with the fan blades. However, the heat dissipation fan of this structure has the following disadvantages: there is always dynamic friction between the shaft and the seal. After a long working time, the cooperation between the shaft and the seal will become loose, and the sealing effect will become worse and worse; in addition, the seal will be worn or aged over time, causing the seal to fail, so that water and debris can easily enter the motor and cause the motor stator coil to short-circuit, burning the motor or other electrical equipment. In addition, with the development of technology, high-pressure fans are gradually replacing the original low-pressure fans in cooling systems, using 500-800V high-voltage electricity to drive the motor. If the motor is not properly sealed and the internal insulation is not done well, leakage will occur, which will not only burn the motor or other electrical equipment, but may even endanger human life. Utility Model Content

[0004] The utility model provides a flexibly connected heat dissipation fan and a fuel cell using the same, so as to solve the problem that the seal of the heat dissipation fan is prone to failure in the prior art.

[0005] The technical solution of the utility model is achieved in this way:

[0006] The first object of the utility model is to provide a flexible connection heat dissipation fan, comprising a motor and a fan blade, wherein the motor comprises a motor assembly, a load transfer assembly and an electronic control assembly, the motor assembly comprises a sealing cover, a permanent magnet assembly A, a stator assembly, a rotor assembly, a front end cover and a rear end cover, the stator assembly is embedded in the inner cavity of the front end cover, the rotor assembly is located in the stator assembly, the rear end cover is installed at the rear end of the stator assembly and closes the inner cavity of the front end cover, the end of the rotating shaft of the rotor assembly extends out of the front end cover, the permanent magnet assembly A is located outside the front end cover and installed on the end of the rotating shaft, the sealing cover is covered outside the permanent magnet assembly A, and the electronic control assembly is installed on the rear end cover; the load transfer assembly comprises a bracket, a load rotating shaft and a permanent magnet assembly B, the bracket is installed on the front end cover, the load rotating shaft is installed in the bracket, the permanent magnet assembly B is installed at the rear shaft end of the load rotating shaft, the permanent magnet assembly B is close to the sealing cover and is magnetically coupled with the permanent magnet assembly A, and the front shaft end of the load rotating shaft is connected to the fan blade.

[0007] The sealing cover is made of non-magnetic material.

[0008] The load transfer assembly described above also includes a cover plate and a bearing. The bracket has a bearing seat protruding outward, the bearing is installed in the bearing seat, the cover plate is installed on the bracket and closes the bearing seat, the load shaft is connected to the bracket through the bearing, and the front shaft end of the load shaft extends out of the cover plate and is connected to the fan blade.

[0009] The front end cover is provided with a first sealing groove, a front sealing ring is installed in the first sealing groove, and the sealing cover is pressed on the front sealing ring.

[0010] The rear end cover is provided with a second sealing groove and a third sealing groove, the second sealing groove is provided with an end cover sealing ring, the third sealing groove is provided with an electric control sealing ring, the rotor assembly is pressed on the end cover sealing ring, and the electric control assembly is pressed on the electric control sealing ring.

[0011] The front end cover has several second lugs protruding from the outer side surface, the rear end cover has several third lugs protruding from the outer side surface, the electronic control component has a fourth lug protruding from the outer side surface, the second lug, the third lug and the fourth lug are arranged correspondingly, and the second lug, the third lug and the fourth lug are fixed together by a second screw.

[0012] A plurality of first heat dissipation strips are protruded from the outer side surface of the front end cover, and a plurality of second heat dissipation strips are protruded from the outer side surface of the electric control component.

[0013] The above also includes a cover shell, which includes an outer ring and an inner ring, the outer ring and the inner ring are connected by a plurality of bars, the inner ring is sleeved on the stator assembly, and the outer ring extends to the periphery of the fan blade.

[0014] The front end cover mentioned above has a plurality of first lugs protruding from the outside, and the inner circle of the cover shell has a plurality of mounting seats protruding inwardly. The mounting seats are arranged corresponding to the lugs, and the first lugs and the mounting seats are fixed together by first screws.

[0015] The second object of the present utility model is to provide a fuel cell, comprising a cooling system, wherein the cooling system comprises a flexible connection heat dissipation fan, wherein the flexible connection heat dissipation fan is the flexible connection heat dissipation fan described above.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1. The flexible connection heat dissipation fan comprises a motor and a fan blade, wherein the motor comprises a motor assembly, a load transfer assembly and an electronic control assembly, wherein the motor assembly comprises a sealing cover, a permanent magnet assembly A, a stator assembly, a rotor assembly, a front end cover and a rear end cover, wherein the stator assembly is embedded in the inner cavity of the front end cover, the rotor assembly is located in the stator assembly, the rear end cover is installed at the rear end of the stator assembly and closes the inner cavity of the front end cover, the end of the rotating shaft of the rotor assembly extends out of the front end cover, the permanent magnet assembly A is located outside the front end cover and installed on the end of the rotating shaft, the sealing cover is covered outside the permanent magnet assembly A, and the electronic control assembly is installed on the rear end cover; the load transfer assembly comprises a bracket, a load rotating shaft and a permanent magnet assembly B, the bracket is installed on the front end cover, the load rotating shaft is installed in the bracket, the permanent magnet assembly B is installed at the rear shaft end of the load rotating shaft, the permanent magnet assembly B is close to the sealing cover and is arranged corresponding to the permanent magnet assembly A, and the front shaft end of the load rotating shaft is connected to the fan blade. After the motor is powered on, the rotor assembly rotates while driving the permanent magnet assembly A to rotate to form a magnetic field. Using the principle of the permanent magnet coupler, the power on the permanent magnet assembly A is transmitted to the permanent magnet assembly B through the magnetic field between the permanent magnet assembly A and the permanent magnet assembly B, so that the permanent magnet assembly B rotates accordingly, and then the power is transmitted to the fan blade through the load shaft; the motor assembly is sealed by a sealing cover with good sealing effect, and there is no problem of easy failure of the seal after a long working time, thereby ensuring the working life of the heat dissipation motor; at the same time, there is a gap between the permanent magnet assembly A and the permanent magnet assembly B, and there is no mechanical rigid connection between the fan blade and the rotor assembly of the high-voltage motor, thereby reducing the vibration impact caused by the rotation of the rotor assembly.

[0018] 2. Other advantages of the present invention are described in detail in the embodiment section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a flexible connection heat dissipation fan provided in Embodiment 1 of the present utility model;

[0020] Figure 2 This is an exploded view of the flexibly connected cooling fan;

[0021] Figure 3 It is a cross-sectional view of a flexibly connected heat dissipation fan;

[0022] Figure 4 for Figure 3 A magnified image of point A;

[0023] Figure 5 for Figure 3 A magnified view of point B;

[0024] Figure 6 It is a schematic diagram of the structure of the motor in the flexible connection heat dissipation fan;

[0025] Figure 7 This is the exploded diagram of the motor;

[0026] Figure 8 is a cross-sectional view of the motor;

[0027] Fig. 9 is a schematic diagram of the structure of a motor component in a motor;

[0028] Fig.10 This is an exploded view of the motor assembly;

[0029] Fig.11 It is a structural schematic diagram of a load transfer component in a motor;

[0030] Fig.12 An exploded view of the load transfer assembly. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1:

[0033] like Figures 1 to 12As shown, the present embodiment provides a flexible connection heat dissipation fan, including a motor 1 and a fan blade 2, characterized in that: the motor 1 includes a motor component 11, a load transfer component 12 and an electronic control component 13, the motor component 11 includes a sealing cover 111, a permanent magnet component A113, a stator component 114, a rotor component 115, a front end cover 119 and a rear end cover 117, the stator component 114 is embedded in the inner cavity of the front end cover 119, the rotor component 115 is located in the stator component 114, the rear end cover 117 is installed at the rear end of the stator component 114 and closes the inner cavity of the front end cover 119, and the end of the rotating shaft 1151 of the rotor component 115 extends out of the front end cover 119, the permanent magnet component A113 is located outside the front end cover 119 and is installed on the end of the rotating shaft 1151, the sealing cover 111 covers the outside of the permanent magnet component A113, and the electric control component 13 is installed on the rear end cover 117; the load transfer assembly 12 includes a bracket 123, a load rotating shaft 124 and a permanent magnet component B125, the bracket 123 is installed on the front end cover 119, the load rotating shaft 124 is installed in the bracket 123, the permanent magnet component B125 is installed at the rear shaft end of the load rotating shaft 124, the permanent magnet component B125 is close to the sealing cover 111 and is magnetically coupled with the permanent magnet component A113, and the front shaft end of the load rotating shaft 124 is connected to the fan blade 2.

[0034] The flexible connection heat dissipation fan, after the motor 1 is powered on, the rotor assembly 115 rotates and drives the permanent magnet assembly A113 to rotate to form a magnetic field. By utilizing the principle of the permanent magnet coupler, through the magnetic field effect between the permanent magnet assembly A113 and the permanent magnet assembly B125, the power on the permanent magnet assembly A113 is transmitted to the permanent magnet assembly B125, so that the permanent magnet assembly B125 follows the rotation, and then the power is transmitted to the fan blade 2 through the load shaft 124; the motor assembly 11 is sealed by the sealing cover 111, and the sealing effect is good, and there is no problem of easy failure of the seal after a long working time; at the same time, there is a gap between the permanent magnet assembly A113 and the permanent magnet assembly B125, and there is no mechanical rigid connection between the fan blade 2 and the rotor assembly 115 of the high-voltage motor 1, which reduces the vibration impact caused by the rotation of the rotor assembly 115.

[0035] The working principle of the permanent magnet coupler is mainly based on the transmission of torque through the action of the magnetic field. It is mainly composed of an input end (permanent magnet component A113) and an output end (permanent magnet component B125), and the power is transmitted between the two ends through the magnetic field. The rotation of the input end (permanent magnet component A113) will generate a rotating magnetic field, and the permanent magnet will form a corresponding magnetic field at the input end (permanent magnet component A113). When the rotating magnetic field of the input end (permanent magnet component A113) acts on the output end (permanent magnet component B125), the permanent magnet at the output end (permanent magnet component B125) senses the magnetic field and thus generates a corresponding magnetic field. The permanent magnet magnetic field of the output end (permanent magnet component B125) interacts with the magnetic field of the input end (permanent magnet component A113), thereby realizing the transmission of rotational power between the input end (permanent magnet component A113) and the output end (permanent magnet component B125). The permanent magnet coupler is a contactless coupling and does not require a mechanical transmission device. This non-contact coupling makes the permanent magnetic coupler frictionless and wear-free, reduces energy loss and improves transmission efficiency.

[0036] The sealing cover 111 is made of non-magnetic conductive material, which will not affect magnetic conductivity or shielding of magnetic field.

[0037] The load transfer assembly 12 described above also includes a cover plate 121 and a bearing 122. The bracket 123 has a bearing seat 1231 protruding outward, the bearing 122 is installed in the bearing seat 1231, the cover plate 121 is installed on the bracket and closes the bearing seat 1231, the load shaft 124 is connected to the bracket 123 through the bearing 122, and the front shaft end of the load shaft 124 extends out of the cover plate 121 and is connected to the fan blade 2.

[0038] The front end cover 119 is provided with a first sealing groove 1193, in which a front sealing ring 112 is installed, and the sealing cover 111 is pressed on the front sealing ring 112. The front sealing ring 112 further enhances the sealing effect of the motor assembly 11.

[0039] The rear end cover 117 is provided with a second sealing groove 1171 and a third sealing groove 1172, the end cover sealing ring 116 is installed in the second sealing groove 1171, the electric control sealing ring 118 is installed in the third sealing groove 1172, the rotor assembly 115 is pressed on the end cover sealing ring 116, and the electric control assembly 13 is pressed on the electric control sealing ring 118. The end cover sealing ring 116 and the electric control sealing ring 118 strengthen the sealing effect of the rear end of the motor assembly 11.

[0040] The front end cover 119 has a plurality of second lugs 1192 protruding from the outer side surface, the rear end cover 117 has a plurality of third lugs 1173 protruding from the outer side surface, the electric control component 13 has a fourth lug 132 protruding from the outer side surface, the second lug 1192, the third lug 1173 and the fourth lug 132 are arranged correspondingly, and the second lug 1192, the third lug 1173 and the fourth lug 132 are fixed together by the second screw 14. The front end cover 119, the rear end cover 117 and the electric control component 13 are easy to install and fix.

[0041] The front end cover 119 has a plurality of first heat dissipation bars 1194 protruding from the outer side surface, and the electric control component 13 has a plurality of second heat dissipation bars 131 protruding from the outer side surface. The first heat dissipation bars 1194 and the second heat dissipation bars 131 enhance the heat dissipation effect of the motor 1 to prevent the motor 1 from overheating.

[0042] The above also includes a cover 3, which includes an outer ring 31 and an inner ring 32. The outer ring 31 and the inner ring 32 are connected by a plurality of bars 33. The inner ring 32 is sleeved on the stator assembly 114, and the outer ring 31 extends to the periphery of the fan blade 2.

[0043] The front end cover 119 has a plurality of first lugs 1191 protruding from the outside, and the inner ring 32 of the housing 3 has a plurality of mounting seats 321 protruding inwardly. The mounting seats 321 are arranged corresponding to the lugs 1141, and the first lugs 1191 and the mounting seats 321 are fixed together by first screws 34. The housing 3 is easy to install.

[0044] Embodiment 2:

[0045] The utility model discloses a fuel cell, including a cooling system. The cooling system includes a flexible connection heat dissipation fan 100, which is characterized in that the flexible connection heat dissipation fan 100 is the flexible connection heat dissipation fan described in the first embodiment.

[0046] By improving the structure of the heat dissipation motor in the cooling system, the heat dissipation effect of the fuel cell is ensured, thereby ensuring the working life of the fuel cell.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A flexible connection heat dissipation fan, comprising a motor (1) and a fan blade (2), characterized in that: The motor (1) comprises a motor assembly (11), a load transfer assembly (12) and an electric control assembly (13); the motor assembly (11) comprises a sealing cover (111), a permanent magnet assembly A (113), a stator assembly (114), a rotor assembly (115), a front end cover (119) and a rear end cover (117); the stator assembly (114) is embedded in an inner cavity of the front end cover (119); the rotor assembly (115) is located in the stator assembly (114); the rear end cover (117) is installed at the rear end of the stator assembly (114) and closes the inner cavity of the front end cover (119); an end of a rotating shaft (1151) of the rotor assembly (115) extends out of the front end cover (119); the permanent magnet assembly A (113) is located at the front end The load transfer assembly (12) comprises a bracket (123), a load rotating shaft (124) and a permanent magnet assembly B (125), the bracket (123) is mounted on the front end cover (119), the load rotating shaft (124) is mounted in the bracket (123), the permanent magnet assembly B (125) is mounted on the rear end of the load rotating shaft (124), the permanent magnet assembly B (125) is close to the sealing cover (111) and is magnetically coupled with the permanent magnet assembly A (113), and the front end of the load rotating shaft (124) is connected to the fan blade (2).

2. A flexible connection heat dissipation fan according to claim 1, characterized in that: The sealing cover (111) is made of non-magnetic conductive material.

3. A flexible connection heat dissipation fan according to claim 2, characterized in that: The load transfer assembly (12) further comprises a cover plate (121) and a bearing (122); the bracket (123) is provided with a bearing seat (1231) protruding outwardly; the bearing (122) is mounted in the bearing seat (1231); the cover plate (121) is mounted on the bracket and closes the bearing seat (1231); the load shaft (124) is connected to the bracket (123) via the bearing (122); and the front shaft end of the load shaft (124) extends out of the cover plate (121) and is connected to the fan blade (2).

4. The flexible connection heat dissipation fan according to claim 3, characterized in that: The front end cover (119) is provided with a first sealing groove (1193), a front sealing ring (112) is installed in the first sealing groove (1193), and the sealing cover (111) is pressed on the front sealing ring (112).

5. The flexible connection heat dissipation fan according to claim 4, characterized in that: The rear end cover (117) is provided with a second sealing groove (1171) and a third sealing groove (1172); an end cover sealing ring (116) is installed in the second sealing groove (1171); an electric control sealing ring (118) is installed in the third sealing groove (1172); the rotor assembly (115) is pressed on the end cover sealing ring (116); and the electric control assembly (13) is pressed on the electric control sealing ring (118).

6. The flexible connection heat dissipation fan according to claim 5, characterized in that: The front end cover (119) has a plurality of second lugs (1192) protruding from the outer side surface, the rear end cover (117) has a plurality of third lugs (1173) protruding from the outer side surface, and the electric control component (13) has a fourth lug (132) protruding from the outer side surface. The second lug (1192), the third lug (1173) and the fourth lug (132) are arranged correspondingly, and the second lug (1192), the third lug (1173) and the fourth lug (132) are fixed together by a second screw (14).

7. The flexible connection heat dissipation fan according to claim 6, characterized in that: A plurality of first heat dissipation strips (1194) protrude from the outer side surface of the front end cover (119), and a plurality of second heat dissipation strips (131) protrude from the outer side surface of the electric control component (13).

8. A flexible connection heat dissipation fan according to any one of claims 1 to 7, characterized in that: The invention also comprises a cover shell (3), the cover shell (3) comprises an outer ring (31) and an inner ring (32), the outer ring (31) and the inner ring (32) are connected via a plurality of bars (33), the inner ring (32) is sleeved on the stator assembly (114), and the outer ring extends to the periphery of the fan blade (2).

9. The flexible connection heat dissipation fan according to claim 8, characterized in that: The front end cover (119) has a plurality of first lugs (1191) protruding from the outside, and the inner ring (32) of the cover shell (3) has a plurality of mounting seats (321) protruding inwardly, the mounting seats (321) and the lugs (1141) are arranged correspondingly, and the first lugs (1191) and the mounting seats (321) are fixed together by a first screw (34).

10. A fuel cell, comprising a cooling system, the cooling system comprising a flexibly connected heat dissipation fan (100), characterized in that: The flexible connection heat dissipation fan (100) is the flexible connection heat dissipation fan according to any one of claims 1 to 9.

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