Low-speed large-torque self-cooling permanent magnet motor

Abstract

The invention discloses a low-speed large-torque self-cooling permanent magnet motor, which relates to the technical field of large-torque permanent magnet motors, and is characterized in that an outer cylinder is arranged at the outer end of a motor main body, and a sealed isolation cavity is formed between the outer cylinder and the motor main body; a plurality of groups of steam guide plates radiating outwards from the axis are uniformly distributed on the outer cylinder body; a flowing cavity communicated with the isolation cavity is formed in each steam guide plate; the lower end of the outer cylinder is further communicated with a water storage ring groove with the inner diameter larger than that of the outer cylinder; an upper fixing cover is further arranged at the upper end of the outer barrel, and a circulating mechanism used for circulating cooling water is arranged in the upper fixing cover. Cooling water capable of circularly absorbing heat and cooling the outer surface of the motor main body is arranged in the device, and the circulating mechanism arranged in the device is driven by mechanical energy output by the device to circulate the cooling water, so that the cooling work can be automatically implemented in the operation process of the device, and the stable operation of the device is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of high-torque permanent magnet motors, and particularly relates to a low-speed high-torque self-cooling permanent magnet motor. Background Art

[0002] A low-speed high-torque permanent magnet motor is a specially designed electric motor that uses permanent magnet materials to generate a magnetic field and can output high torque through the internal structure. Therefore, this type of motor is often used in cooling towers. Currently, this type of low-speed high-torque motor is used to replace traditional motors in cooling towers, so as to directly drive the fan blades, thereby omitting transmission and torque conversion devices such as long shaft couplings and speed reducers in the middle. As a result, the working stability is higher and it is easier to install. Since the cooling wind tower needs to operate at a high load for a long time, a large amount of heat energy is generated by the motor, and the accumulation of high heat will cause the permanent magnets inside the permanent magnet motor to demagnetize, thereby affecting the normal operation of the motor.

[0003] The above content is only used to assist in understanding the technical solution of the present invention, and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0004] The purpose of the present invention is to solve the above deficiencies and provide a low-speed high-torque self-cooling permanent magnet motor.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A low-speed high-torque self-cooling permanent magnet motor, including a motor main body and a drive shaft installed on the motor main body. An outer cylinder is provided at the outer end of the motor main body, and a sealed isolation chamber is formed between the outer cylinder and the motor main body;

[0007] A plurality of steam guide plates radiating from the axis to the outside are uniformly arranged on the outer cylinder. A flow cavity communicating with the isolation chamber is provided inside the steam guide plate, and the bottom surface of the flow cavity is inclined towards the isolation chamber side;

[0008] A water storage ring groove with an inner diameter larger than that of the outer cylinder is also connected to the lower end of the outer cylinder, and the water storage ring groove is used to store cooling water;

[0009] An upper fixing cover is also provided at the upper end of the outer cylinder, and a circulating mechanism for circulating cooling water is provided inside the upper fixing cover.

[0010] Furthermore, the circulating mechanism includes a suction component for sucking cooling water in the water storage ring groove, a driving component for driving the suction component to rotate, and a dripping component for dripping the sucked cooling water onto the outer surface of the motor main body.

[0011] Further, the suction assembly includes a pump pressure cylinder disposed on the inner wall of the upper fixed cover, a one-way valve group that seals and slides within the pump pressure cylinder, and a suction pipe with one end communicating with the pump pressure cylinder and the other end communicating with the water storage ring groove.

[0012] Further, the one-way valve group includes a piston plate that seals and slides within the pump pressure cylinder, a linkage rod passing through through holes uniformly formed on the piston plate, a sealing plate disposed on the linkage rod and closing the through holes by abutment, a pressure receiving plate disposed at the lower end of the linkage rod, and a first spring with one end disposed on the piston plate and the other end disposed on the pressure receiving plate.

[0013] Further, a piston rod that movably passes through the pump pressure cylinder is disposed on the piston plate. The driving assembly includes a butting frame disposed at the end of the piston rod away from the piston plate, a bearing frame disposed on the upper surface of the outer cylinder, a movable shaft rotatably disposed within the bearing frame, first arc-shaped convex plates uniformly disposed at the end of the movable shaft close to the butting frame, a second arc-shaped convex plate disposed at the end of the butting frame close to the first arc-shaped convex plate and movably abutting against the first arc-shaped convex plate, a gear disposed at the end of the movable shaft away from the first arc-shaped convex plate, a rack ring disposed on the driving shaft and meshing with the gear, and a second spring sleeved outside the piston rod with one end disposed on the pump pressure cylinder and the other end disposed on the butting frame.

[0014] Further, the dripping assembly includes a water distribution tank disposed on the outer cylinder, drip pipes uniformly disposed within the water distribution tank and used to connect the water distribution tank with the isolation chamber, and a water delivery pipe with one end communicating with the pump pressure cylinder and the other end communicating with the water distribution tank.

[0015] Compared with the prior art, the beneficial effects of this solution are as follows: Cooling water that can circularly absorb heat and cool the outer surface of the motor main body is provided inside this device, and the mechanical energy output by itself is used to drive a circulation mechanism provided inside the device to circulate the cooling water, so that the cooling work can be automatically implemented during the operation of the device, thereby ensuring the stable operation of the device.

[0016] This device is provided with a steam guide plate that radiates and extends outward from the axial center position of the motor main body. Thus, the gaseous cooling water that absorbs heat and cools the outer surface of the motor main body and evaporates can be extended and conveyed outward through the flow cavity inside the steam guide plate. Thus, the wind blades at the upper end can use the high-speed airflow generated at the outer end to exchange heat with the steam inside the steam guide plate, thereby quickly removing the heat of the device and making the heat dissipation performance better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0018] Figure 1 is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 is a sectional three-dimensional schematic diagram of the present invention;

[0020] Figure 3 is a schematic diagram of the disassembled structure of the present invention;

[0021] Figure 4 is a schematic diagram of the internal structure of the upper fixing cover in the present invention;

[0022] Figure 5 is a schematic diagram of the structure of the driving component in the present invention;

[0023] Figure 6 is a schematic diagram of the structure of the movable shaft in the present invention;

[0024] Figure 7 is a sectional three-dimensional schematic diagram of the pump pressure cylinder in the present invention;

[0025] Figure 8 is the present invention Figure 2 an enlarged schematic diagram of part A in;

[0026] Figure 9 is the present invention Figure 7 an enlarged schematic diagram of part B in.

[0027] In the figure: 1, motor main body; 11, driving shaft; 2, outer cylinder; 21, isolation chamber; 22, steam guide plate; 23, flow cavity; 24, water storage ring groove; 25, upper fixing cover; 3, pump pressure cylinder; 31, water suction pipe; 4, piston plate; 41, through hole; 42, linkage rod; 43, hole sealing plate; 44, pressure receiving plate; 45, first spring; 5, piston rod; 51, abutting frame; 52, bearing frame; 53, movable shaft; 54, first arc convex plate; 55, second arc convex plate; 56, gear; 57, rack ring; 58, second spring; 6, water distribution tank; 61, drip water pipe; 62, water delivery pipe. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0029] Such as Figures 1-9A low-speed high-torque self-cooling permanent magnet motor shown in the figure includes a motor main body 1 and a drive shaft 11 installed on the motor main body 1. An outer cylinder 2 is provided at the outer end of the motor main body 1, and a sealed isolation chamber 21 is formed between the outer cylinder 2 and the motor main body 1; multiple groups of steam guide plates 22 radiating from the axis to the outside are evenly arranged on the outer cylinder 2. A flow cavity 23 communicating with the isolation chamber 21 is arranged inside the steam guide plate 22, and the bottom surface of the flow cavity 23 is inclined towards the isolation chamber 21 side; a water storage ring groove 24 with an inner diameter larger than that of the outer cylinder 2 is also connected to the lower end of the outer cylinder 2, and the water storage ring groove 24 is used to store cooling water; an upper fixing cover 25 is also provided at the upper end of the outer cylinder 2, and a circulation mechanism for circulating cooling water is arranged inside the upper fixing cover 25. This device is provided with an independent cooling water circulation system that can circulate and cool the motor main body 1, so as to continuously cool the motor main body 1 during the operation of the motor main body 1, thereby ensuring the stable operation of the device. Specifically, a water storage ring groove 24 is arranged at the lower end of the motor main body 1, and cooling water is arranged in the water storage ring groove 24. The cooling water is pumped upward through the internal circulation mechanism and absorbs heat from the outer surface of the motor main body 1. The cooling water after heat absorption becomes gaseous and flows upward in the isolation chamber 21, and then enters the flow cavity 23 and diffuses outward. Since the wind blades of a cooling tower fan are arranged at the upper end of the device, strong external airflow is generated during the rotation of the wind blades, and then the steam in the flow cavity 23 is heat-exchanged in cooperation with this high-speed airflow to become liquid, and then flows back to the isolation chamber 21 along the inclined surface of the flow cavity 23 and returns to the water storage ring groove 24 for storage, thereby realizing the process of circulating cooling. It should be noted that the part where the motor main body 1 contacts the water storage ring groove 24 can be an integrally formed structure or sealed with a waterproof gasket, so that the cooling water in the water storage ring groove 24 will not leak into the motor main body 1, enabling the motor main body 1 to maintain stable operation.

[0030] In an embodiment, the circulation mechanism includes a suction component for sucking the cooling water in the water storage ring groove 24, a driving component for driving the suction component to rotate, and a dripping component for dripping the sucked cooling water onto the outer surface of the motor main body 1. The circulation process of the cooling water is to use the driving component to drive the suction component to suck the cooling water in the water storage ring groove 24 into the dripping component, and then the dripping component drips the cooling water onto the outer surface of the motor main body 1 to absorb heat from the motor main body 1.

[0031] In one embodiment, the suction assembly includes a pump pressure cylinder 3 disposed on the inner wall of the upper fixed cover 25, a one-way valve group that seals and slides within the pump pressure cylinder 3, and a water suction pipe 31 with one end communicating with the pump pressure cylinder 3 and the other end communicating with the water storage ring groove 24. The one-way valve group includes a piston plate 4 that seals and slides within the pump pressure cylinder 3, a linkage rod 42 passing through through holes 41 uniformly formed on the piston plate 4, a sealing plate 43 disposed on the linkage rod 42 and closing the through holes 41 by abutment, a pressure receiving plate 44 disposed at the lower end of the linkage rod 42, and a first spring 45 with one end disposed on the piston plate 4 and the other end disposed on the pressure receiving plate 44. A piston rod 5 that movably passes through the pump pressure cylinder 3 is provided on the piston plate 4. The driving assembly includes a butting frame 51 disposed at the end of the piston rod 5 away from the piston plate 4, a bearing frame 52 disposed on the upper surface of the outer cylinder 2, a movable shaft 53 rotatably disposed within the bearing frame 52, first arc-shaped convex plates 54 uniformly disposed at the end of the movable shaft 53 close to the butting frame 51, a second arc-shaped convex plate 55 disposed at the end of the butting frame 51 close to the first arc-shaped convex plates 54 and movably butting against the first arc-shaped convex plates 54, a gear 56 disposed at the end of the movable shaft 53 away from the first arc-shaped convex plates 54, a rack ring 57 disposed on the driving shaft 11 and meshing with the gear 56, and a second spring 58 sleeved outside the piston rod 5 with one end disposed on the pump pressure cylinder 3 and the other end disposed on the butting frame 51. The dripping assembly includes a water distribution tank 6 disposed on the outer cylinder 2, drip pipes 61 uniformly disposed within the water distribution tank 6 and used to connect the water distribution tank 6 with the isolation chamber 21, and a water delivery pipe 62 with one end communicating with the pump pressure cylinder 3 and the other end communicating with the water distribution tank 6. During the operation of the motor main body 1, the driving shaft 11 provided at its upper end drives the fan blades of the cooling tower to rotate by rotation. At the same time, the rotation of the driving shaft 11 drives the rack ring 57 to rotate synchronously. Furthermore, the rack ring 57 transmits power to the gear 56, causing the gear 56 to rotate synchronously. During the rotation of the gear 56, it drives the movable shaft 53 to rotate, and thus the first arc-shaped convex plates 54 on the movable shaft 53 intermittently butt against the second arc-shaped convex plates 55 on the butting frame 51, causing the piston rod 5 to move up and down within the pump pressure cylinder 3, and further driving the piston plate 4 to move up and down. When the piston plate 4 moves upward, the sealing plate 43 closes the through holes 41. Then, the pump pressure cylinder 3 actively sucks the cooling water in the water storage ring groove 24 through the water suction pipe 31. Next, when the piston plate 4 moves downward, the water pressure drives the pressure receiving plate 44 to move upward, causing the sealing plate 43 to open and release the closure of the through holes 41. Then, the water flows into the upper space on the piston plate 4 and is delivered to the inside of the water distribution tank 6 through the water delivery pipe 62. Subsequently, the cooling water is dripped onto the outer wall of the motor main body 1 through the drip pipes 61 provided within the water distribution tank 6 for heat absorption and temperature reduction.

[0032] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention.

Claims

1. A low-speed, high-torque, self-cooling permanent magnet motor, comprising a motor body (1) and a drive shaft (11) mounted on the motor body (1), characterized in that: An outer cylinder (2) is provided at the outer end of the motor body (1), and a sealed isolation chamber (21) is formed between the outer cylinder (2) and the motor body (1); The outer cylinder (2) is evenly provided with a plurality of steam guide plates (22) radiating outward from the axis, and a flow cavity (23) communicating with the isolation chamber (21) is provided inside the steam guide plate (22), and the bottom surface of the flow cavity (23) is inclined toward the isolation chamber (21); The lower end of the outer cylinder (2) is also connected to a water storage annular groove (24) having an inner diameter greater than that of the outer cylinder (2), and the water storage annular groove (24) is used to store cooling water; An upper fixed cover (25) is also provided at the upper end of the outer cylinder (2), and a circulation mechanism for circulating cooling water is provided inside the upper fixed cover (25).

2. The low-speed, high-torque self-cooling permanent magnet motor according to claim 1, characterized in that: The circulation mechanism comprises a suction component for sucking cooling water in the water storage ring groove (24), a driving component for driving the suction component to rotate, and a dripping component for dripping the sucked cooling water onto the outer surface of the motor body (1).

3. The low-speed, high-torque self-cooling permanent magnet motor according to claim 2 is characterized in that: The suction assembly comprises a pump cylinder (3) arranged on the inner wall of the upper fixed cover (25), a one-way valve group sealingly sliding in the pump cylinder (3), and a water suction pipe (31) having one end connected to the pump cylinder (3) and the other end connected to the water storage ring groove (24).

4. The low-speed, high-torque self-cooling permanent magnet motor according to claim 3 is characterized in that: The one-way valve group comprises a piston plate (4) sealingly sliding in a pump cylinder (3), a linkage rod (42) penetrating through holes (41) uniformly provided on the piston plate (4), a sealing plate (43) arranged on the linkage rod (42) and abutting against and sealing the through holes (41), a pressure plate (44) arranged at the lower end of the linkage rod (42), and a first spring (45) having one end arranged on the piston plate (4) and the other end arranged on the pressure plate (44).

5. The low-speed, high-torque self-cooling permanent magnet motor according to claim 4, characterized in that: The piston plate (4) is provided with a piston rod (5) movably connected with the pump cylinder (3). The driving assembly comprises an abutment frame (51) arranged at an end of the piston rod (5) away from the piston plate (4), a bearing frame (52) arranged on the upper surface of the outer cylinder (2), a movable shaft (53) rotatably arranged in the bearing frame (52), a first arc-shaped convex plate (54) evenly arranged at an end of the movable shaft (53) close to the abutment frame (51), a second arc-shaped convex plate (55) arranged at an end of the abutment frame (51) close to the first arc-shaped convex plate (54) and movably abutting against the first arc-shaped convex plate (54), a gear (56) arranged at an end of the movable shaft (53) away from the first arc-shaped convex plate (54), a rack ring (57) arranged on the driving shaft (11) and meshing with the gear (56), and a second spring (58) sleeved on the outside of the piston rod (5) and having one end arranged on the pump cylinder (3) and the other end arranged on the abutment frame (51).

6. The low-speed, high-torque self-cooling permanent magnet motor according to claim 5, characterized in that: The drip shower assembly comprises a water distribution groove (6) arranged on the outer cylinder (2), a drip pipe (61) evenly arranged in the water distribution groove (6) and used to connect the water distribution groove (6) with the isolation chamber (21), and a water delivery pipe (62) one end of which is connected to the pump cylinder (3) and the other end of which is connected to the water distribution groove (6).

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