Cooling tower fan

Abstract

The utility model provides a cooling tower fan which comprises a machine shell, the machine shell comprises a front shell body, a middle shell body and a rear shell body, the front shell body, the middle shell body and the rear shell body are sequentially connected, the front shell body and the middle shell body are connected to form a motor cavity, and the middle shell body and the rear shell body are connected to form an electric cavity. A motor is connected in the motor cavity, an electrical element is connected in the electrical cavity, and a motor shaft arranged on the motor extends out of the front shell. And heat dissipation fins are arranged on the outer surface of the shell, are arranged in a diverging manner from the center of the front shell to the direction of the rear shell, and are arranged along the periphery of the shell in an array manner. According to the cooling tower fan, the motor and the electronic elements are arranged in the two spaces respectively, electromagnetic noise generated when the motor runs is reduced, interference to the electronic elements is reduced, the service life of the electronic elements is prolonged, the cooling fins are arranged on the outer surface of the machine shell, the cooling capacity of the cooling tower fan is improved, and the high-temperature resistance is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, concretely relates to a cooling tower fan. BACKGROUND

[0002] Cooling tower is the circulating cooling water and air direct contact, through the evaporation heat absorption principle to scatter the waste heat produced in the industry or refrigeration air conditioning to ensure the operation of the device. Cooling tower fan will air into the tower and contact with cooling water, produce heat exchange, its performance directly influences cooling tower efficiency and operating cost. Cooling tower fan needs to have high efficiency, low noise, safe and reliable characteristics. Fan working efficiency compares traditional fan energy saving 15-30%, low noise, is suitable for being used as cooling tower fan, but the high temperature resistance is poor, can not satisfy high temperature environment.

[0003] Therefore, the above problems are urgent to be solved. INVENTION CONTENT

[0004] The utility model discloses a cooling tower fan, which has low torsion strength, high efficiency, good energy saving performance, multi-bearing support design for motor shaft, good mechanical stability, stable operation, low torsion strength, low working noise, good heat dissipation, improved high temperature resistance, and meets the requirements of high temperature use environment.

[0005] Technical scheme: in order to realize the above object, the utility model provides a cooling tower fan, including the casing, the casing includes front casing body, middle casing body and rear casing body, and the front casing body, the middle casing body and the rear casing body are connected in turn, and the front casing body and the middle casing body are connected to form a motor cavity, and the middle casing body and the rear casing body are connected to form an electrical cavity. The motor cavity is connected with a motor, and the electrical cavity is connected with electrical elements. The motor shaft of the motor extends from the front casing body. The outer surface of the casing is provided with heat dissipation fins, which are arranged from the center of the front casing body to the rear casing body. The heat dissipation fins are arranged along the outer periphery of the casing. The rear casing body is provided with a wiring port, which is divided into a power line interface and a control line interface. The utility model divides the internal space of the casing into a motor cavity for installing the motor and an electrical cavity for installing the electrical elements. The motor and the electrical elements are arranged in the two spaces respectively, which reduces the electromagnetic noise generated during the operation of the motor, reduces the interference to the electrical elements, prolongs the service life of the electrical elements, and improves the heat dissipation capacity of the cooling tower fan by arranging heat dissipation fins on the outer surface of the casing, improves the high temperature resistance, and meets the requirements of high temperature use environment.

[0006] Further, the cooling tower fan, the motor includes a stator and a rotor. The stator is connected to the middle shell near the front shell side, the rotor is coaxially arranged outside the stator, the motor shaft and the rotor are coaxially connected. The motor shaft is movably connected to the center of the middle shell through the bearing shaft at one end, and the motor shaft is movably connected to the center of the front shell through the bearing shaft at the middle. The rotor is arranged outside the stator, the rotor has a large diameter and high rotational inertia, can generate a stronger magnetic field coupling at low speed, has low torque, high efficiency, good energy saving, the motor shaft adopts multi-bearing support design, has good mechanical stability, stable operation, low torque, and low working noise.

[0007] Further, the cooling tower fan, the stator is provided as a cylinder opening to the rotor direction, the rotor is provided as a cylinder opening to the stator direction, the stator and the rotor are oppositely buckled and arranged, and the stator is arranged inside the rotor. The outer side of the stator is provided with an iron core. The inner side of the rotor disc is provided with a permanent magnet. The stator and the rotor are provided as mutually buckled cylinders, which reduces magnetic leakage, improves energy conversion efficiency, and reduces temperature rise.

[0008] Further, the cooling tower fan, the middle shell includes a circular groove part connected to the bearing, the circular groove part is provided with a first circular ring, a second circular ring and a third circular ring in sequence from outside, the circular groove part is coaxially and integrally connected with the first circular ring through the connecting ribs arranged on the outer wall of the circular groove part, and the connecting ribs form through grooves around the circular groove part. The first circular ring is coaxially and integrally connected with the second circular ring through the connecting blocks arranged on the outer wall of the first circular ring, and the connecting blocks form through grooves around the first circular ring. The second circular ring is integrally provided with the third circular ring through the connecting plates 7 arranged on the outer side wall of the second circular ring, and the connecting plates 7 form through grooves around the second circular ring. A plurality of through grooves are arranged in the middle shell, when the rotor rotates, a smooth heat dissipation channel is formed in the motor, heat is more easily dissipated, the air and the shell contact area is increased, and the heat dissipation performance is improved.

[0009] Further, the cooling tower fan, the middle shell is provided with a first middle connecting lug, and the first middle connecting lug is provided with a first countersunk hole. The front shell is provided with a front connecting lug, and the front connecting lug is provided with a threaded hole. The front connecting lug and the first middle connecting lug are correspondingly arranged. The fastener is screwed into the threaded hole provided in the front connecting lug through the first countersunk hole, so as to connect and fix the front shell and the middle shell. The front shell and the middle shell are connected by the fastener, which is convenient for installation and maintenance.

[0010] Furthermore, in the aforementioned cooling tower fan, a second middle connecting lug is provided on the outer side of the middle shell, with the first and second middle connecting lugs alternately arranged. The second middle connecting lug has a countersunk through hole. The rear shell has a first rear connecting lug and a second rear connecting lug, which are alternately arranged. The second rear connecting lug, the second middle connecting lug, and the front connecting lug are correspondingly arranged, with the second rear connecting lug having a second countersunk through hole. Fasteners are respectively passed through the second countersunk through hole and the through hole of the second middle connecting lug and screwed into the threaded hole of the front connecting lug, connecting and fixing the front shell, middle shell, and rear shell. By connecting and fixing the front shell, middle shell, and rear shell with fasteners, in addition to connecting the middle shell and the rear shell, additional fastening force is provided for the front shell and middle shell, improving the integrity of the middle shell, increasing mechanical strength, preventing loosening during long-term use, and extending service life.

[0011] Furthermore, in the aforementioned cooling tower fan, the first rear connecting ear and the first middle connecting ear are correspondingly provided and abut against each other. The abutment of the first rear connecting ear and the first middle connecting ear seals the opening of the first countersunk through hole, improving aesthetics and preventing the fasteners inside the first countersunk through hole from coming loose, thus avoiding damage to the cooling tower fan caused by the fasteners coming loose.

[0012] Furthermore, in the aforementioned cooling tower fan, the second connecting lug has fins on both sides, and each fin has a through hole. Fasteners are inserted into the through holes to install and fix the cooling tower fan. The fin installation and fixing design makes the cooling tower fan structure compact and easy to install.

[0013] Furthermore, in the aforementioned cooling tower fan, the connecting block is provided with threaded holes, and the stator is connected to the threaded holes provided in the connecting block by fasteners. The stator is connected to the connecting block provided in the middle shell, so that the center of gravity of the cooling tower fan is located in the middle of the cooling tower fan, thereby improving the structural strength.

[0014] Furthermore, in the aforementioned cooling tower fan, the heat dissipation fins extend towards the center of the rear casing and intersect and connect radially along the rear casing. Extending the heat dissipation fins to the center of the rear casing improves aesthetics, increases the heat dissipation area of ​​the cooling tower fan, and enhances heat dissipation performance.

[0015] As can be seen from the above technical solution, this utility model has the following beneficial effects: The cooling tower fan of this utility model divides the internal space of the casing into a motor cavity for installing the motor and an electrical cavity for installing electronic components. By placing the motor and electronic components in two separate spaces, electromagnetic noise generated during motor operation is reduced, interference with electronic components is minimized, and the lifespan of electronic components is extended. Furthermore, heat dissipation fins are provided on the outer surface of the casing to improve the cooling tower fan's heat dissipation capacity, enhance its high-temperature resistance, and meet the requirements of high-temperature operating environments. The stator and rotor are designed as interlocking cylinders, reducing magnetic leakage, improving energy conversion efficiency, and lowering temperature rise. Multiple through slots are provided in the middle casing to create unobstructed heat dissipation channels inside the motor, making it easier for heat to dissipate, increasing the contact area between air and the casing, and improving heat dissipation performance. Attached Figure Description

[0016] Figure 1 This is a front view of the cooling tower fan of this utility model;

[0017] Figure 2 This is a cross-sectional view of the cooling tower fan of this utility model;

[0018] Figure 3 This is a schematic diagram of the middle shell structure;

[0019] Figure 4 This is a schematic diagram of the front housing structure;

[0020] Figure 5 This is a schematic diagram of the rear shell structure.

[0021] In the diagram: 1. Housing; 11. Front housing; 111. Front connecting lug; 12. Middle housing; 121. Circular groove; 122. First ring; 123. Second ring; 124. Third ring; 125. Connecting rib; 126. Connecting block; 127. Connecting plate; 13. Rear housing; 131. First rear connecting lug; 132. Second rear connecting lug; 1321. Second countersunk through hole; 14. Heat dissipation fins; 2. Motor; 21. Motor shaft; 22. Stator; 221. Iron core; 23. Rotor; 41. First middle connecting lug; 411. First countersunk through hole; 42. Second middle connecting lug; 421. Wing; 422. Through hole. Detailed Implementation

[0022] Example 1

[0023] like Figure 1The cooling tower fan shown in the application comprises a casing 1, which comprises a front casing 11, a middle casing 12 and a rear casing 13, the front casing 11, the middle casing 12 and the rear casing 13 are connected in sequence, the front casing 11 and the middle casing 12 are connected to form a motor cavity, and the middle casing 12 and the rear casing 13 are connected to form an electrical cavity. A motor 2 is connected in the motor cavity, and an electrical element is connected in the electrical cavity, and a motor shaft 21 of the motor 2 extends from the front casing 11. The outer surface of the casing 1 is provided with a heat dissipation fin 14, which is arranged in a diverging manner from the center of the front casing 11 to the rear casing 13, and the heat dissipation fin 14 is arranged in an array along the outer periphery of the casing 1.

[0024] As shown in the cooling tower fan, Figure 2 The motor 2 comprises a stator 22 and a rotor 23. The stator 22 is connected to the side of the middle casing 12 close to the front casing 11, the rotor 23 is coaxially arranged outside the stator 22, and the motor shaft 21 and the rotor 23 are coaxially connected. One end of the motor shaft 21 is movably connected to the center of the middle casing 12 through a bearing shaft, and the middle part of the motor shaft 21 is movably connected to the center of the front casing 11 through a bearing shaft. The stator 22 is arranged as a cylinder open to the direction of the rotor 23, the rotor 23 is arranged as a cylinder open to the direction of the stator 22, the stator 22 and the rotor 23 are arranged in a clamping manner with the openings opposite to each other, and the stator 22 is arranged inside the rotor 23. An iron core 221 is arranged outside the stator 22. A permanent magnet is arranged inside the rotor 23.

[0025] As shown in the cooling tower fan, Figures 3-5The shown cooling tower fan, the middle shell 12 includes a circular groove part 121 connected with the bearing, the circular groove part 121 is sequentially provided with a first circular ring 122, a second circular ring 123 and a third circular ring 124, the circular groove part 121 is coaxially and integrally connected with the first circular ring 122 through the connecting ribs 125 arranged on the outer wall of the circular groove part 121, and the through grooves around the circular groove part 121 are formed between the connecting ribs 125. The first circular ring 122 is coaxially and integrally connected with the second circular ring 123 through the connecting blocks 126 arranged on the outer wall of the first circular ring 122, and the through grooves around the first circular ring 122 are formed between the connecting blocks 126. The second circular ring 123 is integrally provided with the third circular ring 124 through the connecting plates 127 arranged on the outer side wall of the second circular ring 123, and the through grooves around the second circular ring 123 are formed between the connecting plates 127. The first middle connecting lug 41 is arranged on the outer side of the middle shell 12, and the first countersunk through hole 411 is arranged on the first middle connecting lug 41. The front connecting lug 111 is arranged on the front shell 11, and the threaded hole is arranged on the front connecting lug 111. The front connecting lug 111 and the first middle connecting lug 41 are correspondingly arranged. The fastener is screwed into the threaded hole arranged on the front connecting lug 111 through the first countersunk through hole 411, so as to connect and fix the front shell 11 and the middle shell 12. The second middle connecting lug 42 is arranged on the outer side of the middle shell 12, and the first middle connecting lug 41 and the second middle connecting lug 42 are alternately arranged. The countersunk through hole is arranged on the second middle connecting lug 42. The first rear connecting lug 131 and the second rear connecting lug 132 are arranged on the rear shell 13, and the first rear connecting lug 131 and the second rear connecting lug 132 are alternately arranged. The second rear connecting lug 132, the second middle connecting lug 42 and the front connecting lug 111 are correspondingly arranged, and the second countersunk through hole 1321 is arranged on the second rear connecting lug 132. The fastener is screwed into the threaded hole arranged on the front connecting lug 111 through the second countersunk through hole 1321 and the through hole arranged on the second middle connecting lug 42, so as to connect and fix the front shell 11, the middle shell 12 and the rear shell 13.

[0026] In the embodiment, the first rear connecting lug 131 and the first middle connecting lug 41 are correspondingly arranged, and the first rear connecting lug 131 and the first middle connecting lug 41 abut. The first rear connecting lug 131 and the first middle connecting lug 41 abut, so as to close the opening of the first countersunk through hole 411.

[0027] In the embodiment, the wings 421 are arranged on both sides of the second middle connecting lug 42, the through holes 422 are arranged on the wings 421, and the fastener is screwed into the through holes 422, so as to install and fix the cooling tower fan. Further, in the above-mentioned cooling tower fan, the connecting blocks 126 are provided with the threaded holes, and the stator 22 is connected to the threaded holes arranged on the connecting blocks 126 through the fastener. The stator 22 is connected to the connecting blocks 126 arranged on the middle shell 12, so that the gravity center of the cooling tower fan is located in the middle part of the cooling tower fan, and the structural strength is improved.

[0028] As Figure 5The cooling tower fan shown, the heat dissipation fin 14 is arranged to extend to the center of the rear shell 13, and the heat dissipation fin 14 is connected along the radial direction of the rear shell 13.

[0029] The above examples are exemplary, and the purpose is to illustrate the technical concept and characteristics of the present application, so that those skilled in the art can understand the content of the present application and implement it accordingly, and the protection scope of the present application cannot be limited thereby. Any equivalent changes or modifications made in accordance with the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A cooling tower fan, characterized in that: The device includes a housing (1), which includes a front housing (11), a middle housing (12), and a rear housing (13). The front housing (11), the middle housing (12), and the rear housing (13) are connected in sequence. The front housing (11) and the middle housing (12) are connected to form a motor cavity, and the middle housing (12) and the rear housing (13) are connected to form an electrical cavity. A motor (2) is connected inside the motor cavity, and an electrical component is connected inside the electrical cavity. The motor shaft (21) of the motor (2) extends out from the front housing (11). The outer surface of the housing (1) is provided with heat dissipation fins (14). The heat dissipation fins (14) are arranged diverging from the center of the front housing (11) toward the rear housing (13). The heat dissipation fins (14) are arranged in an array along the outer periphery of the housing (1).

2. The cooling tower fan according to claim 1, characterized in that: The motor (2) includes a stator (22) and a rotor (23); the stator (22) is connected to the middle housing (12) on the side near the front housing (11), the rotor (23) is coaxially disposed on the outside of the stator (22), and the motor shaft (21) and the rotor (23) are coaxially connected; one end of the motor shaft (21) is movably connected to the center of the middle housing (12) through a bearing shaft, and the middle part of the motor shaft (21) is movably connected to the center of the front housing (11) through a bearing shaft.

3. The cooling tower fan according to claim 2, characterized in that: The stator (22) is a cylinder that opens toward the rotor (23), and the rotor (23) is a cylinder that opens toward the stator (22). The stator (22) and the rotor (23) are fitted together with their openings facing each other. The stator (22) is located inside the rotor (23). An iron core (221) is provided on the outside of the stator (22). A permanent magnet is provided on the inside of the rotor (23).

4. The cooling tower fan according to claim 3, characterized in that: The middle housing (12) includes a circular groove (121) for connecting the bearing. The circular groove (121) is provided with a first ring (122), a second ring (123), and a third ring (124) arranged outwards in sequence. The circular groove (121) is coaxially and integrally connected to the first ring (122) by connecting ribs (125) arrayed on the outer wall of the circular groove (121). A through groove is formed between the connecting ribs (125) surrounding the circular groove (121). The first ring (122) is coaxially and integrally connected to the second ring (123) through connecting blocks (126) arranged in an array on the outer wall of the first ring (122), and a through groove is formed between the connecting blocks (126) around the first ring (122); the second ring (123) is integrally set with the third ring (124) through connecting plates (127) arranged in an array on the outer wall of the second ring (123), and a through groove is formed between the connecting plates (127) around the second ring (123).

5. The cooling tower fan according to claim 1, characterized in that: The outer side of the middle housing (12) is provided with a first middle connecting ear (41), and the first middle connecting ear (41) is provided with a first countersunk through hole (411); the front housing (11) is provided with a front connecting ear (111), and the front connecting ear (111) is provided with a threaded hole. The front connecting ear (111) and the first middle connecting ear (41) are provided correspondingly; the fastener passes through the first countersunk through hole (411) and is screwed into the threaded hole provided in the front connecting ear (111) to connect and fix the front housing (11) and the middle housing (12).

6. The cooling tower fan according to claim 5, characterized in that: The outer side of the middle shell (12) is provided with a second middle connecting ear (42), and the first middle connecting ear (41) and the second middle connecting ear (42) are arranged alternately in sequence; the second middle connecting ear (42) is provided with a countersunk through hole; the rear shell (13) is provided with a first rear connecting ear (131) and a second rear connecting ear (132), and the first rear connecting ear (131) and the second rear connecting ear (132) are arranged alternately, and the second rear connecting ear (132), the second middle connecting ear (42) and the front connecting ear (111) are arranged correspondingly, and the second rear connecting ear (132) is provided with a second countersunk through hole (1321); fasteners pass through the second countersunk through hole (1321) and the through hole provided by the second middle connecting ear (42) respectively and are screwed into the threaded hole provided by the front connecting ear (111) to connect and fix the front shell (11), the middle shell (12) and the rear shell (13).

7. The cooling tower fan according to claim 6, characterized in that: The first rear connecting ear (131) and the first middle connecting ear (41) are respectively provided, and the first rear connecting ear (131) and the first middle connecting ear (41) abut against each other.

8. The cooling tower fan according to claim 6, characterized in that: The second connecting ear (42) is provided with wings (421) on both sides, and the wings (421) on both sides are provided with through holes (422). Fasteners are inserted into the through holes (422) to install and fix the cooling tower fan.

9. The cooling tower fan according to claim 4, characterized in that: The connecting block (126) is provided with a threaded hole, and the stator (22) is connected to the threaded hole provided in the connecting block (126) by a fastener.

10. The cooling tower fan according to claim 1, characterized in that: The heat dissipation fins (14) extend toward the center of the rear housing (13) and are radially intersecting and connected along the rear housing (13).

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