Closed axial flow fan for energy storage

Abstract

The invention discloses a closed axial flow fan for energy storage, and belongs to the field of fans, the closed axial flow fan comprises a motor comprising an inner stator and an outer rotor which are rotationally connected with each other; the impeller assembly comprises a hub, blades and an outer cover, the blades are connected between the hub and the outer cover, and the hub is connected outside the outer rotor in a sleeving mode; the air guide rings are connected with the inner stator, the air guide rings are sleeved in the outer cover at intervals and are communicated with the outer cover, the periphery of each air guide ring is connected with a surface plate, the periphery of each surface plate can be flanged, and a plurality of mounting holes are formed in each surface plate. The outer rotor comprises a machine shell, an end cover, a sealing ring and a plurality of magnetic steel, the magnetic steel is connected into the machine shell, the machine shell and the end cover are connected through the sealing ring, the machine shell and the end cover are both rotationally connected with the inner stator, and one end of the impeller body is connected outside the machine shell in a sleeved mode. The invention has the technical effects that not only is the axial size smaller, but also the generated airflow is not easy to leak, and meanwhile, the installation stability is good.

Description

Technical Field

[0001] The invention relates to a fan, and in particular to a closed axial flow fan for energy storage. Background Art

[0002] Axial flow fans for energy storage are mainly used in energy storage systems such as high-altitude energy storage, desert energy storage or offshore wind power energy storage, and have the advantage of easy heat dissipation.

[0003] However, the axial dimension of the relevant energy storage axial flow fan is large, which makes it difficult to be successfully installed in the energy storage cabinet of the relevant energy storage system. In addition, the airflow generated by the relevant energy storage axial flow fan is prone to leakage, which may lead to low working efficiency and static pressure. At the same time, the strength of the installation components of the relevant energy storage axial flow fan is not high, which may lead to poor installation stability. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a closed axial flow fan for energy storage, which not only has a smaller axial dimension, but also the airflow it generates is not prone to leakage and has good installation stability.

[0005] Technical solution:

[0006] A closed axial flow fan for energy storage, comprising:

[0007] A motor including an inner stator and an outer rotor rotatably connected to each other;

[0008] An impeller assembly comprises a hub, blades and an outer cover, wherein the blades are connected between the hub and the outer cover, and the hub is sleeved on the outside of the outer rotor;

[0009] An air guide ring connected to the inner stator is sleeved in the outer cover at intervals and communicated with the outer cover. The air guide ring is connected with a flat plate around it. The flat plate can be flanged around it, and a plurality of mounting holes are arranged on the flat plate.

[0010] Optionally, the outer rotor includes a casing, an end cover, a sealing ring and a plurality of magnets, wherein the magnets are connected to the casing, and the casing and the end cover are connected via the sealing ring, wherein the casing and the end cover are both rotatably connected to the inner stator, and the hub is sleeved on the outside of the casing.

[0011] Optionally, the outer rotor further includes:

[0012] a step portion provided on one side of one end of the housing;

[0013] A first protrusion and a second protrusion are connected to the end cover at intervals, wherein the height of the first protrusion is smaller than the height of the second protrusion;

[0014] a receiving groove formed between the first protrusion and the second protrusion;

[0015] Wherein, the sealing ring is located in the accommodating groove, the sealing ring abuts between one end of the casing and the inner wall of the end cover, the step portion abuts against the first protrusion, and the second protrusion abuts against the outer wall of the casing.

[0016] Optionally, the outer rotor also includes a sloped portion provided on the other side of one end of the casing, so that a gap is formed between the second protrusion and one end of the casing, and the gap is configured as a part of the accommodating groove, and at least part of the sealing ring is located in the gap.

[0017] Optionally, the outer rotor further includes:

[0018] A plurality of sheet bodies, one end of each of the sheet bodies being connected to the end cover at intervals along the circumferential direction;

[0019] A wind deflector connected to the other ends of the plurality of sheets;

[0020] A radial grid is formed between adjacent sheets and the air guide plates.

[0021] Optionally, the outer rotor further includes a plurality of columns each connected to the outside of the end cover.

[0022] Optionally, the outer rotor further includes a flange sleeved on the outside of the casing, the flange is connected to the hub, and the flange is connected to the end cover.

[0023] Optionally, it also includes a mesh cover, one end of which is connected to the inner stator, and the other end of which is connected to the air guide ring.

[0024] Optionally, it also includes a connector sleeved outside the shaft body of the inner stator, the connector and the shaft body are connected by a key and a retaining spring, and one end of the mesh cover is connected to the connector.

[0025] Optionally, also include:

[0026] A first channel disposed within the shaft of the inner stator;

[0027] a second channel disposed in the connector;

[0028] a third channel disposed at one end of the mesh cover;

[0029] Wherein, after the lead wires of the inner stator pass through the first channel, the second channel and the third channel in sequence, sealant is poured into the first channel and the second channel.

[0030] Beneficial effects:

[0031] (1) The inner stator and the outer rotor facilitate the motor to be in the form of an outer rotor, which is convenient for effectively reducing the axial size of the motor, thereby facilitating the effective reduction of the axial size of the closed axial flow fan for energy storage of the present solution, and further facilitating smooth installation in the energy storage cabinet of the relevant energy storage system;

[0032] (2) The outer cover is used to surround the blades to form a closed structure to reduce the leakage of airflow at the top of the blades, thereby improving work efficiency and static pressure. The outer cover and the air guide ring are convenient for guiding the airflow, thereby facilitating the reduction of airflow turbulence and further improving work efficiency and static pressure;

[0033] (3) The first protrusion, the receiving groove, the second protrusion and one end of the housing form a maze structure, which is convenient for increasing the path for external water vapor, dust, etc. to enter the outer rotor, making it difficult for external water vapor, dust, etc. to enter the outer rotor. Under the action of the sealing ring, external water vapor, dust, etc. are completely prevented from entering the outer rotor, effectively improving the protection level of the motor;

[0034] (4) During operation, the blades and the air guide plate rotate around the inner stator, so that the airflow in the radial grid is subjected to centrifugal force. Under the action of centrifugal force, the airflow flows from the inner end to the outer end of the radial grid, passes through the gap between the winding of the inner stator and the magnetic steel of the outer rotor, and finally flows back to the inner end of the radial grid through the winding of the inner stator, so as to complete the self-circulation. During the self-circulation, heat is dissipated through the end cover and the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is one of the structural diagrams of a closed axial flow fan for energy storage in Example 1 of the present invention;

[0036] Figure 2 This is a second structural diagram of a closed axial flow fan for energy storage according to Embodiment 1 of the present invention;

[0037] Figure 3 This is one of the partial views of a closed axial flow fan for energy storage according to Embodiment 1 of the present invention;

[0038] Figure 4 This is a second partial view of a closed axial flow fan for energy storage according to the first embodiment of the present invention;

[0039] Figure 5 for Figure 4 Partial diagram of A in the figure;

[0040] Figure 6 It is a structural diagram of the mesh cover of Example 1 of the present invention;

[0041] Figure 7 for Figure 6 Partial diagram of E in the middle;

[0042] Figure 8is an axonometric view of the motor according to embodiment 1 of the present invention;

[0043] Fig. 9 for Figure 8 Partial diagram of B in the figure;

[0044] Fig.10 is a cross-sectional view of a motor according to embodiment 1 of the present invention;

[0045] Fig.11 for Fig.10 Partial diagram of C in the middle;

[0046] Fig.12 for Fig.10 Partial diagram of D in the middle;

[0047] Fig.13 is a structural diagram of an end cover of Example 1 of the present invention;

[0048] In the figure: 1, motor; 11, inner stator; 111, shaft; 1111, second slot; 1112, third slot; 1113, first channel; 112, winding; 12, outer rotor; 121, housing; 1211, step portion; 1212, slope portion; 1213, flange; 122, end cover; 1221, first protrusion; 1222, second protrusion; 1223, receiving groove; 1224, sheet; 1225, column; 1226, gap; 123, sealing ring; 124, magnet; 125, air guide plate; 126, radial grid; 13, gap; 2, impeller assembly; 21, blades; 22, outer cover; 23, hub; 3, air guide ring; 31, flange; 32, mounting hole; 33, flat plate; 4, mesh cover; 41, third channel; 5, connector; 51, first slot; 52, second channel; 6, lead wire. DETAILED DESCRIPTION

[0049] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the invention are shown in the accompanying drawings. The words "first", "second", etc. described in the present invention are set for the convenience of describing the technical solution of the present invention, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present invention. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradictions or conflicts, all of which are within the scope of protection required by the present invention.

[0051] Example 1

[0052] like Figure 1-Figure 5 and Fig.10 The present embodiment provides a closed axial flow fan for energy storage, comprising: a motor 1, comprising an inner stator 11 and an outer rotor 12 which are rotatably connected to each other; an impeller assembly 2, comprising a hub 23, blades 21 and an outer cover 22, wherein the blades 21 are connected between the hub 23 and the outer cover 22, and the hub 23 is sleeved on the outside of the outer rotor 12; an air guide ring 3 connected to the inner stator 11, wherein the air guide ring 3 is sleeved in the outer cover 22 at intervals and communicated with the outer cover 22, and a flat plate 33 is connected around the air guide ring 3, and the flat plate 33 can be flanged 31 around the flat plate 33, and a plurality of mounting holes 32 are provided on the flat plate 33.

[0053] Specifically, the inner stator 11 and the outer rotor 12 facilitate the motor 1 to be in the form of an outer rotor type, which facilitates to effectively reduce the axial size of the motor 1, thereby facilitating to effectively reduce the axial size of the closed axial flow fan for energy storage of this scheme, and then facilitates to be smoothly installed in the energy storage cabinet of the relevant energy storage system; the blade 21 facilitates to generate axial airflow, thereby facilitating heat dissipation; the outer cover 22 is used to surround the blade 21 to form a closed structure to reduce the leakage of airflow at the top of the blade 21, thereby improving work efficiency and static pressure, the outer cover 22 and the air guide ring 3 facilitate to guide the airflow, thereby facilitating to reduce airflow turbulence and further improve work efficiency and static pressure; the mounting hole 32 is used to cooperate with the relevant fasteners to facilitate the installation of the air guide ring 3 in the energy storage cabinet of the relevant energy storage system, the flange 31 is used to increase the strength of the air guide ring 3, so that the air guide ring 3 is not easy to deform. In summary, the air guide ring 3 is also used as a mounting component of the closed axial flow fan for energy storage of this scheme, and due to the high strength of the air guide ring 3, it is convenient to ensure good installation stability.

[0054] Further, such as Fig.11 The outer rotor 12 includes a casing 121, an end cover 122, a sealing ring 123 and a plurality of magnets 124. The magnet 124 is connected to the casing 121. The casing 121 and the end cover 122 are connected through the sealing ring 123. The casing 121 and the end cover 122 are both rotatably connected to the inner stator 11, and the hub 23 is sleeved on the outside of the casing 121.

[0055] Specifically, the sealing ring 123 is convenient for preventing external water vapor, dust, etc. from entering the outer rotor 12, so that the sealing performance between the housing 121 and the end cover 122 is good, and the protection level of the motor 1 is effectively improved. The material of the sealing ring 123 can be silicone rubber, fluororubber, etc.; a plurality of through holes can also be opened on the end cover 122, which is not only convenient for discharging condensed water inside the outer rotor 12, but also convenient for increasing heat dissipation performance. If the protection level requirement of the motor 1 is higher, a plurality of through holes are not opened on the end cover 122.

[0056] Further, such as Fig.11 The outer rotor 12 also includes: a step portion 1211 provided on one side of one end of the casing 121; a first protrusion 1221 and a second protrusion 1222 spaced apart and connected in the end cover 122, wherein the height of the first protrusion 1221 is less than the height of the second protrusion 1222; a receiving groove 1223 formed between the first protrusion 1221 and the second protrusion 1222; wherein the sealing ring 123 is located in the receiving groove 1223, the sealing ring 123 abuts against one end of the casing 121 and the inner wall of the end cover 122, the step portion 1211 abuts against the first protrusion 1221, and the second protrusion 1222 abuts against the outer wall of the casing 121.

[0057] Specifically, the first protrusion 1221, the accommodating groove 1223, the second protrusion 1222 and one end of the casing 121 form a maze structure, which is convenient for increasing the path for external water vapor, dust, etc. to enter the outer rotor 12, so that external water vapor, dust, etc. are not easy to enter the outer rotor 12, and under the action of the sealing ring 123, external water vapor, dust, etc. are completely prevented from entering the outer rotor 12; because the step portion 1211 and the first protrusion 1221 are in contact with each other, it is convenient to generate axial limitation when the casing 121 and the end cover 122 are matched; because the second protrusion 1222 is in contact with the outer wall of the casing 121, it is convenient to generate radial limitation when the casing 121 and the end cover 122 are matched.

[0058] Further, such as Fig.11 The outer rotor 12 also includes a slope portion 1212 arranged on the other side of one end of the casing 121, so that a gap 1226 is formed between the second protrusion 1222 and one end of the casing 121, and the gap 1226 is configured as a part of the accommodating groove 1223, and at least part of the sealing ring 123 is located in the gap 1226.

[0059] Specifically, the slope portion 1212 facilitates guiding the housing 121 and the end cover 122 when they are matched, making it easier for the housing 121 and the end cover 122 to match; the gap 1226 is used as a accommodating space for the sealing ring 123 after being squeezed, preventing the sealing ring 123 from being over-squeezed, thereby facilitating increasing the service life of the sealing ring 123.

[0060] Further, such as Figure 12-13 The outer rotor 12 further includes: a plurality of plates 1224 , one end of each of which is connected to the end cover 122 at intervals along the circumferential direction; an air guide plate 125 connected to the other end of each of the plates 1224 ; and a radial grid 126 formed between adjacent plates 1224 and the air guide plate 125 .

[0061] Specifically, during operation, the sheet 1224 and the air guide plate 125 rotate around the inner stator 11, so that the airflow in the radial grid 126 is subjected to centrifugal force. Under the action of the centrifugal force, the airflow flows from the inner end to the outer end of the radial grid 126, and passes through the gap 13 between the winding 112 of the inner stator 11 and the magnetic steel 124 of the outer rotor 12, and finally flows back to the inner end of the radial grid 126 through the winding 112 of the inner stator 11, so as to complete the self-circulation. During the self-circulation, the heat is dissipated through the end cover 122 and the casing 121; the plurality of sheets 1224 are preferably evenly spaced along the circumferential interval of the end cover 122, so as to ensure good uniformity of heat dissipation, and the number of sheets 1224 is not limited; the air guide plate 125 makes the airflow flow regularly in the radial grid 126 to prevent the airflow from running around randomly.

[0062] Further, such as Figure 8 and Figure 10-13The outer rotor 12 also includes a plurality of columns 1225 connected to the outside of the end cover 122 .

[0063] Specifically, the column 1225 is used to increase the contact area between the end cover 122 and the outside world, so as to increase the heat dissipation performance of the end cover 122. When the airflow self-circulates, it is convenient to effectively dissipate heat through the end cover 122. Several columns 1225 are preferably distributed in a circular array along the end cover 122 to ensure good heat dissipation uniformity.

[0064] Further, such as Fig.10 The outer rotor 12 also includes a flange 1213 sleeved on the outside of the casing 121 , the flange 1213 is connected to the hub 23 , and the flange 1213 is connected to the end cover 122 .

[0065] Specifically, the flange 1213 is used to support the hub 23, thereby supporting the impeller assembly 2. Since the flange 1213 is connected to the end cover 122, it is convenient for the flange 1213, the end cover 122, the casing 121 and the impeller assembly 2 to rotate synchronously. The flange 1213 and the end cover 122 are specifically connected by a number of fasteners.

[0066] Further, such as Figure 1-Figure 2 and Figure 6 , and also includes a mesh cover 4, one end of the mesh cover 4 is connected to the inner stator 11, and the other end of the mesh cover 4 is connected to the air guide ring 3.

[0067] Specifically, the mesh cover 4 is convenient for ensuring the heat dissipation performance of the motor 1 and preventing external dust, impurities, etc. from interfering with the rotation of the blades 21. The mesh cover 4 can be specifically formed by welding a plurality of flat steels.

[0068] Further, such as Figure 8-Figure 9 , and also includes a connector 5 sleeved on the outside of the shaft body 111 of the inner stator 11, the connector 5 and the shaft body 111 are connected by a key and a retaining spring, and one end of the mesh cover 4 is connected to the connector 5.

[0069] Specifically, the connector 5 is used to connect the shaft body 111 and the mesh cover 4 of the inner stator 11; the key is used to achieve relative circumferential limitation of the connector 5 and the shaft body 111, and specifically, a first groove body 51 may be provided on the connector 5, and a second groove body 1111 may be provided on the shaft body 111, the first groove body 51 and the second groove body 1111 are connected, and both are used to cooperate with the key; the retaining spring is used to achieve relative axial limitation of the connector 5 and the shaft body 111, and specifically, a third groove body 1112 for accommodating the retaining spring may be provided on the shaft body 111.

[0070] Further, such as Figure 7-Figure 9, and also includes: a first channel 1113 provided in the shaft body 111 of the inner stator 11; a second channel 52 provided in the connector 5; and a third channel 41 provided at one end of the mesh cover 4; wherein, after the lead wire 6 of the inner stator 11 passes through the first channel 1113, the second channel 52 and the third channel 41 in sequence, the first channel 1113 and the second channel 52 are poured with sealant.

[0071] Specifically, the first channel 1113, the second channel 52 and the third channel 41 facilitate the lead wire 6 to be led out; the sealant is used to increase the sealing performance, thereby ensuring the protection level of the motor 1, and the material of the sealant can be acrylate, epoxy resin, etc.

[0072] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A closed axial flow fan for energy storage, characterized in that: include: A motor (1) comprising an inner stator (11) and an outer rotor (12) which are rotatably connected to each other; An impeller assembly (2) comprises a hub (23), blades (21) and an outer cover (22), wherein the blades (21) are connected between the hub (23) and the outer cover (22), and the hub (23) is sleeved on the outside of the outer rotor (12); An air guide ring (3) connected to the inner stator (11), the air guide ring (3) being sleeved in the outer cover (22) at intervals and communicating with the outer cover (22), the air guide ring (3) being connected to a flat plate (33) on all four sides, the flat plate (33) being capable of being flanged (31) on all four sides, and the flat plate (33) being provided with a plurality of mounting holes (32).

2. A closed axial flow fan for energy storage according to claim 1, characterized in that: The outer rotor (12) comprises a casing (121), an end cover (122), a sealing ring (123) and a plurality of magnets (124); the magnets (124) are connected inside the casing (121); the casing (121) and the end cover (122) are connected via the sealing ring (123); the casing (121) and the end cover (122) are both rotatably connected to the inner stator (11); and the hub (23) is sleeved outside the casing (121).

3. A closed axial flow fan for energy storage according to claim 2, characterized in that: The outer rotor (12) further comprises: a step portion (1211) provided on one side of one end of the housing (121); A first protrusion (1221) and a second protrusion (1222) are connected to the end cover (122) at intervals, wherein the height of the first protrusion (1221) is smaller than the height of the second protrusion (1222); a receiving groove (1223) formed between the first protrusion (1221) and the second protrusion (1222); The sealing ring (123) is located in the accommodating groove (1223), the sealing ring (123) abuts against one end of the casing (121) and the inner wall of the end cover (122), the step portion (1211) abuts against the first protrusion (1221), and the second protrusion (1222) abuts against the outer wall of the casing (121).

4. A closed axial flow fan for energy storage according to claim 3, characterized in that: The outer rotor (12) further comprises a slope portion (1212) arranged on the other side of one end of the housing (121), so that a gap (1226) is formed between the second protrusion (1222) and one end of the housing (121), and the gap (1226) is configured as a part of the receiving groove (1223), and at least a part of the sealing ring (123) is located in the gap (1226).

5. A closed axial flow fan for energy storage according to claim 2, characterized in that: The outer rotor (12) further comprises: A plurality of sheet bodies (1224), one end of each of the sheet bodies (1224) being connected to the end cover (122) at intervals along the circumferential direction; an air guide plate (125) connected to the other ends of the plurality of sheet bodies (1224); A radial grid (126) is formed between adjacent sheets (1224) and the air guide plates (125).

6. A closed axial flow fan for energy storage according to claim 2, characterized in that: The outer rotor (12) further comprises a plurality of columns (1225) each connected to the outside of the end cover (122).

7. A closed axial flow fan for energy storage according to claim 2, characterized in that: The outer rotor (12) further comprises a flange (1213) sleeved on the outside of the casing (121), the flange (1213) being connected to the hub (23), and the flange (1213) being connected to the end cover (122).

8. A closed axial flow fan for energy storage according to any one of claims 1 to 7, characterized in that: It also comprises a mesh cover (4), one end of which is connected to the inner stator (11), and the other end of which is connected to the air guide ring (3).

9. A closed axial flow fan for energy storage according to claim 8, characterized in that: It also comprises a connector (5) sleeved on the outside of the shaft (111) of the inner stator (11), the connector (5) and the shaft (111) are connected via a key and a retaining spring, and one end of the mesh cover (4) is connected to the connector (5).

10. A closed axial flow fan for energy storage according to claim 9, characterized in that: Also includes: A first channel (1113) provided in the shaft body (111) of the inner stator (11); A second channel (52) provided in the connector (5); a third channel (41) provided at one end of the mesh cover (4); After the lead wire of the inner stator (11) passes through the first channel (1113), the second channel (52) and the third channel (41) in sequence, sealant is poured into the first channel (1113) and the second channel (52).

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