A new type of permanent magnet low-speed direct drive motor for cooling tower

Abstract

A new type of permanent magnet low-speed direct drive motor for cooling tower, including the shell, the center of the shell is provided with a rotating shaft, the middle part of the rotating shaft is provided with a rotor, also including the stator, the rotor and the stator are located in the shell, the one end of the rotating shaft is sequentially provided with a first bearing, a first bearing cover and a first end cover along the radial direction, the other end of the rotating shaft is sequentially provided with a second bearing, a second bearing cover and a second end cover along the radial direction, the first end cover and the second end cover are connected to the two ends of the shell respectively, the first bearing cover is provided with a first inclined surface which is downward inclined relative to the horizontal plane, the first end cover is provided with a second inclined surface which is downward inclined relative to the horizontal plane. Through the setting of the first inclined surface and the second inclined surface, the rainwater will not accumulate on the first bearing cover and the first end cover of the motor in rainy days, but flow outward along the two inclined surfaces, so as to avoid the accumulation and intrusion of water into the motor, improve the waterproof performance and improve the service life of the motor.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a novel permanent magnet low-speed direct drive motor for cooling towers. Background Technology

[0002] A cooling tower is a device that uses the contact between water and air to dissipate waste heat generated in industrial processes or refrigeration and air conditioning systems through evaporation. The fan at the top of the cooling tower is driven by an electric motor. This drive structure needs to maintain high water resistance during the cooling tower assembly to avoid frequent malfunctions that could prevent the blades from rotating and thus render the cooling tower unusable. Currently, the water resistance of motors used in cooling towers is generally limited, and occasionally water accumulates on the end caps and bearing covers, eventually seeping into the motor's interior. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a new type of permanent magnet low-speed direct drive motor for cooling towers.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A novel permanent magnet low-speed direct drive motor for cooling towers includes a housing, a rotating shaft passing through the center of the housing, a rotor located on the outer side of the middle of the rotating shaft, and a stator. The rotor and stator are located inside the housing. One end of the rotating shaft is radially fitted with a first bearing, a first bearing cover, and a first end cap. The other end of the rotating shaft is radially fitted with a second bearing, a second bearing cover, and a second end cap. The first end cap and the second end cap are respectively connected to the two ends of the housing. The first bearing cover has a first inclined surface that is inclined downward relative to the horizontal plane, and the first end cap has a second inclined surface that is inclined downward relative to the horizontal plane.

[0006] Furthermore, the inclination angle of the first inclined plane is 2-20°.

[0007] Furthermore, the inclination angle of the second inclined plane is 5-30°.

[0008] Furthermore, at least a portion of one end of the rotating shaft is located outside the first bearing outer cover and the first end cover, and the other end face of the rotating shaft abuts against the inner sidewall of the second bearing outer cover.

[0009] Furthermore, the rotating shaft and the outer cover of the first bearing are sealed together by a sealing device.

[0010] Furthermore, the sealing device is a waterproof ring and a double-lip sealing ring.

[0011] Furthermore, a waterproof junction box is connected to the outside of the housing.

[0012] Furthermore, the outer side of the casing has several heat sinks arranged in a circumferential array.

[0013] Furthermore, the diameter of the second end cap is larger than the diameter of the housing.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model proposes a novel permanent magnet low-speed direct-drive motor for cooling towers, comprising a housing, a rotating shaft passing through the center of the housing, a rotor located on the outer side of the middle of the rotating shaft, and a stator. The rotor and stator are located inside the housing. One end of the rotating shaft is radially fitted with a first bearing, a first bearing cover, and a first end cover. The other end of the rotating shaft is radially fitted with a second bearing, a second bearing cover, and a second end cover. The first and second end covers are respectively connected to the two ends of the housing. The first bearing cover has a first inclined surface sloping downwards relative to the horizontal plane, and the first end cover has a second inclined surface sloping downwards relative to the horizontal plane. The first and second inclined surfaces prevent rainwater from accumulating on the first bearing cover and the first end cover during rainy weather, instead allowing water to flow outwards along the two inclined surfaces. This avoids water accumulation and intrusion into the motor, improving waterproofing and extending the motor's service life.

[0016] 2. The present invention proposes a novel permanent magnet low-speed direct drive motor for cooling towers, wherein at least part of one end of the rotating shaft is located outside the first bearing outer cover and the first end cover, and the cooling tower fan blades are directly connected to this part of the rotating shaft, resulting in a simple and compact structure.

[0017] 3. The present invention proposes a novel permanent magnet low-speed direct drive motor for cooling towers, wherein the shaft and the outer cover of the first bearing are sealed together by a sealing device, which consists of a waterproof ring and a double-lip seal. The waterproof ring and the double-lip seal achieve a double seal, preventing water and dust from entering the motor through the gap between the shaft and the outer cover of the first bearing, thereby further improving the sealing performance and service life.

[0018] 4. The present invention proposes a novel permanent magnet low-speed direct drive motor for cooling towers, wherein several heat sinks are arranged in a circumferential array on the outer side of the casing, and the arrangement of the heat sinks facilitates heat dissipation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of a novel permanent magnet low-speed direct drive motor for cooling towers according to the present invention.

[0021] Figure 2 This is a top view of a novel permanent magnet low-speed direct drive motor for cooling towers according to this utility model.

[0022] Figure 3 for Figure 2 Sectional view along axis AA;

[0023] Figure 4 for Figure 3 An enlarged view of point B;

[0024] In the diagram, 10 is the housing; 20 is the shaft; 30 is the rotor; 40 is the stator; 501 is the first bearing; 502 is the outer cover of the first bearing; 503 is the first end cover; 601 is the second bearing; 602 is the outer cover of the second bearing; 603 is the second end cover; 701 is the first inclined surface; 702 is the second inclined surface; 801 is the waterproof ring; 802 is the double-lip seal ring; 803 is the waterproof junction box; and 804 is the heat sink. Detailed Implementation

[0025] The following is combined Figure 1-4 This utility model will be described in detail.

[0026] A novel permanent magnet low-speed direct drive motor for cooling towers includes a housing 10, a rotating shaft 20 passing through the center of the housing 10, a rotor 30 located on the outer side of the middle part of the rotating shaft 20, and a stator 40. The rotor 30 and the stator 40 are located inside the housing 10. One end of the rotating shaft 20 is radially fitted with a first bearing 501, a first bearing outer cover 502, and a first end cover 503. The other end of the rotating shaft 20 is radially fitted with a second bearing 601, a second bearing outer cover 602, and a second end cover 603. The first end cover 503 and the second end cover 603 are respectively connected to the two ends of the housing 10. The first bearing outer cover 502 has a first inclined surface 701 that is inclined downward relative to the horizontal surface, and the first end cover 503 has a second inclined surface 702 that is inclined downward relative to the horizontal surface. By setting the first inclined surface 701 and the second inclined surface 702, rainwater will not accumulate on the first bearing outer cover 502 and the first end cover 503 of the motor in rainy weather. Instead, it will flow outward along the two inclined surfaces. This avoids water accumulation and intrusion into the motor, improves waterproofing, and extends the service life of the motor.

[0027] Specifically, permanent magnet low-speed direct-drive motors offer advantages such as high efficiency, high torque, and long lifespan. These motors connect directly to the cooling tower fan blades, eliminating the need for a gearbox and long shaft, thus improving equipment reliability and reducing failure rates and maintenance. Furthermore, these motors feature a simple structure, low vibration, low noise, energy efficiency, and easy maintenance, making them ideal for use as the drive mechanism in cooling towers. The first bearing 501 and the second bearing 601 are maintenance-free, requiring no bearing maintenance and saving on repair costs.

[0028] The housing 10, along with the first end cover 503 and the second end cover 603, jointly enclose the interior of the motor, enclosing the internal rotor 30, stator 40, and shaft 20, and preventing external dust, moisture, and impurities from entering the motor, thus ensuring the stability of motor operation. The first bearing 501 and the second bearing 601 facilitate the rotation of the shaft 20, and the outer cover 502 of the first bearing provides protection for both the first and second bearings. The connections between the components are secured with bolts. There is a positional difference between the outer cover 502 of the first bearing and the first end cover 503, and the outer cover 502 of the first bearing has a first inclined surface 701. The lowest point of the first inclined surface 701 is higher than the highest point of the second inclined surface 702 of the first end cover 503. Water accumulated on the first inclined surface 701 flows from high to low, eventually flowing outwards onto the second inclined surface 702.

[0029] In this embodiment, the inclination angle of the first inclined surface 701 is 2-20°. Specifically, as shown... Figure 4 As shown (the dashed line represents the horizontal plane), the inclination angle of the first inclined plane 701 is 5°.

[0030] In this embodiment, the inclination angle of the second inclined surface 702 is 5-30°. Specifically, as shown... Figure 4 As shown (the dashed line represents the horizontal plane), the inclination angle of the first inclined plane 701 is 5°.

[0031] In this embodiment, at least a portion of one end of the rotating shaft 20 is located outside the first bearing outer cover 502 and the first end cover 503, and the cooling tower fan blades are directly connected to this portion of the rotating shaft 20, resulting in a simple and compact structure; the other end face of the rotating shaft 20 abuts against the inner wall of the second bearing outer cover 602.

[0032] In this embodiment, the rotating shaft 20 and the first bearing outer cover 502 are sealed together by a sealing device; further, the sealing device is a waterproof ring 801 and a double-lip seal ring 802. The waterproof ring 801 and the double-lip seal ring 802 achieve a double seal, preventing water and dust from entering the motor through the gap between the rotating shaft 20 and the first bearing outer cover 502, thereby further improving the sealing performance and service life.

[0033] In this embodiment, a waterproof junction box 803 is connected to the outside of the housing 10.

[0034] In this embodiment, a plurality of heat sinks 804 are arranged circumferentially on the outer side of the casing 10. The arrangement of the heat sinks 804 facilitates heat dissipation.

[0035] In this embodiment, the diameter of the second end cover 603 is larger than the diameter of the housing 10. The second end cover 603 is used to fix the motor assembly to the mounting bracket.

[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Images