Semi-direct-drive permanent magnet motor for cooling tower

Abstract

The invention relates to the field of cooling towers, in particular to a semi-direct-drive permanent magnet motor for a cooling tower. The semi-direct-drive permanent magnet motor for the cooling tower comprises a motor body, a fan cover is installed on one side of the motor body, and a fan is installed outside the fan cover. The draught fan comprises a draught fan body and an outer flow guide pipe installed at the air inlet end of the draught fan body, a first filter screen is installed at the other end of the outer flow guide pipe, a concentric inner flow guide pipe is further arranged in the outer flow guide pipe through a fixing ring, and a second filter screen is further fixed to the end, close to the outer flow guide pipe, of the inner flow guide pipe. The second filter screen is semispherical; a driving part is further arranged in the inner flow guide pipe, and a cleaning part is installed on the driving part. According to the semi-direct-drive permanent magnet motor for the cooling tower, for the semi-direct-drive motor, the semi-direct-drive permanent magnet motor is matched with the planetary reducer to be suitable for the fan rotating speed of the cooling tower, compared with a direct-drive motor, 2-3 machine base numbers are reduced, the weight is lighter, the used materials are few, and the cost is low.

Description

Technical Field

[0001] The invention relates to the field of cooling towers, and in particular to a semi-direct drive permanent magnet motor for a cooling tower. Background Art

[0002] A cooling tower is a device used to cool water or other fluids, usually in industrial processes. Its main function is to remove heat from water by evaporation and convection, thereby reducing the temperature of the water. Cooling towers are widely used in industries that require large amounts of cooling water, such as electricity, chemical industry, metallurgy, and air conditioning.

[0003] The cooling tower has a fan system inside, and the driving source of the fan system is generally a direct drive motor. As for the fan system itself, there will be a lot of impurities in the process of accelerating the airflow, which will affect the air intake quality; and as for the motor itself, it occupies a large area and is complicated to install, resulting in high cost of use.

[0004] Therefore, it is necessary to provide a new semi-direct drive permanent magnet motor for cooling tower to solve the above technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a semi-direct drive permanent magnet motor for a cooling tower.

[0006] The semi-direct drive permanent magnet motor for a cooling tower provided by the present invention comprises a motor body, a wind shield is installed on one side of the motor body, and a fan is installed outside the wind shield; The fan comprises a fan body and an outer guide tube installed at the air inlet end of the fan body, a first filter screen is installed at the other end of the outer guide tube, a concentric inner guide tube is arranged inside the outer guide tube through a fixing ring, a gap is provided between the inner guide tube and the outer guide tube, a second filter screen is fixed at one end of the inner guide tube close to the outer guide tube, and the second filter screen is hemispherical; A driving member is also provided in the inner guide tube, and a cleaning member is installed on the driving member. The cleaning member includes a first cleaning part, a second cleaning part and a third cleaning part, and is used to clean the second filter screen, the first filter screen and the inner wall of the outer guide tube respectively.

[0007] Preferably, the motor body includes a flange end cover, one end of the flange end cover is fixed with a casing, a lower end bearing is installed on the upper end of the flange end cover, an upper end cover is also fixed on the casing, a stator core is installed inside the casing, the stator core has a groove, and a winding is embedded in the groove, and the stator core, the casing and the winding constitute a stator.

[0008] Preferably, a rotating shaft is also rotated at the upper end of the lower end bearing, a rotor core is shrink-fitted on the rotating shaft, a groove is provided on the rotor core, and a magnet is embedded in the groove, and the rotating shaft, the magnet and the rotor core constitute a rotor.

[0009] Preferably, an upper end bearing is installed on the upper end of the rotating shaft, a spline is arranged on the shaft head of the rotating shaft, and a planetary reducer is connected through the spline, and the lower end of the planetary reducer is connected to the housing; The wind cover is installed on the outer side of the casing and the planetary reducer. The planetary reducer is a one-stage reducer, and the enclosure is a split type, including two symmetrical cover bodies.

[0010] Preferably, the driving member comprises a positioning frame fixed inside the inner flow guide tube, a bearing on the positioning frame is connected to a transmission shaft, the transmission shaft is also arranged concentrically with the inner flow guide tube, and an impeller is also fixed on the transmission shaft.

[0011] Preferably, the first cleaning part comprises a first fixing seat fixed on the transmission shaft, and a plurality of annularly distributed arc plates are fixed to a circumferential outer wall of the first fixing seat, and the arc plates have first bristles in contact with the second filter screen.

[0012] Preferably, an annular groove is further provided on the circumferential outer wall of the inner flow guide tube, and a concentric reinforcing ring frame is provided outside the inner flow guide tube at a position corresponding to the annular groove, and a plurality of balls are embedded in the circumferential inner wall of the reinforcing ring frame, and the balls are embedded in and roll inside the annular groove; The other ends of the plurality of arc-shaped plates are all fixed on the reinforcing ring frame.

[0013] Preferably, the second cleaning part comprises a spiral bracket fixed on the reinforcing ring frame, the spiral bracket is arranged in the interval between the outer flow guide tube and the inner flow guide tube, and second bristles in contact with the inner wall of the outer flow guide tube are also arranged on the spiral bracket.

[0014] Preferably, the third cleaning part includes a second fixed seat fixed on the transmission shaft, a plurality of annularly distributed support bars are fixed on the second fixed seat, a fixed ring frame is fixed at the other end of the plurality of support bars, and a third bristle in contact with the first filter is also arranged on the support bar.

[0015] Preferably, the outer wall of the outer flow guide pipe is also connected to a waste storage pipe, and a valve pipe is fixed to the other end of the waste storage pipe.

[0016] Compared with the related art, the semi-direct drive permanent magnet motor for cooling tower provided by the present invention has the following beneficial effects: 1. For this semi-direct drive motor, it is suitable for the fan speed of the cooling tower when matched with a planetary reducer. Compared with the direct drive motor, it is 2-3 frame sizes smaller, lighter, uses less material, and has a lower cost; 2. For the fan, it has a multi-layer filter structure inside, which is used to intercept impurities of different particle sizes, so as to better filter impurities in the air and improve the air intake quality; 3. In the driving part, the impeller converts the impact force of the airflow to rotate, and then mobilizes the cleaning parts to clean each filter and the inside of the external guide tube, which is more conducive to cleaning the inside of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a preferred embodiment of a semi-direct drive permanent magnet motor for a cooling tower provided by the present invention; Figure 2 It is a schematic structural diagram of the sealing cover shown in the present invention; Figure 3 It is a schematic diagram of the structure of the outer flow guide tube shown in the present invention; Figure 4 The present invention shows Figure 3 A schematic diagram of the structure in cross-section; Figure 5 It is a schematic structural diagram of the inner flow guide pipe and the second filter screen shown in the present invention; Figure 6 It is a schematic structural diagram of the driving member and the first cleaning part shown in the present invention in cooperation with each other; Figure 7 It is a structural schematic diagram of the second cleaning unit shown in the present invention; Figure 8 It is a schematic structural diagram of the third cleaning unit shown in the present invention.

[0018] Numbers in the figure: 1, motor body; 11, flange end cover; 12, lower end bearing; 13, housing; 14, stator core; 15, magnet; 16, rotor core; 17, winding; 18, shaft; 19, upper end cover; 110, upper end bearing; 111, planetary reducer; 2, wind cover; 3, fan; 31, outer guide tube; 32, first filter; 33, fixing ring; 34, inner guide tube; 35, second Filter screen; 36, annular groove; 37, positioning frame; 38, transmission shaft; 39, impeller; 310, first fixed seat; 311, arc plate; 312, first bristles; 313, reinforcing ring frame; 314, ball bearing; 315, spiral bracket; 316, second bristles; 317, second fixed seat; 318, support bar; 319, third bristles; 320, fixed ring frame; 321, waste storage pipe; 322, valve pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0021] See also Figures 1 to 8 The embodiment of the present invention provides a semi-direct drive permanent magnet motor for a cooling tower, the semi-direct drive permanent magnet motor for a cooling tower comprises a motor body 1, a wind shield 2 is installed on one side of the motor body 1, and a fan 3 is installed outside the wind shield 2: The fan 3 includes a fan body and an outer guide pipe 31 installed at the air inlet end of the fan body. A first filter screen 32 is installed at the other end of the outer guide pipe 31. A concentric inner guide pipe 34 is also arranged inside the outer guide pipe 31 through a fixing ring 33. There is a gap between the inner guide pipe 34 and the outer guide pipe 31. A second filter screen 35 is also fixed at one end of the inner guide pipe 34 close to the outer guide pipe 31, and the second filter screen 35 is hemispherical. A driving member is also provided in the inner flow guide tube 34, and a cleaning member is installed on the driving member. The cleaning member includes a first cleaning part, a second cleaning part and a third cleaning part, and is respectively used to clean the second filter screen 35, the first filter screen 32 and the inner wall of the outer flow guide tube 31. The outer wall of the outer flow guide tube 31 is also connected to a waste storage pipe 321, and a valve pipe 322 is fixed to the other end of the waste storage pipe 321.

[0022] It should be noted that the motor in the device is a semi-direct drive permanent magnet motor. Compared with the traditional direct drive motor, it is smaller in size, occupies a smaller area, and is lighter in weight. It is more convenient to install and disassemble it, and the cost of the device itself is reduced, making it more suitable for use. For the fan 3, its air inlet end has an outer guide tube 31, and a first filter screen 32 is arranged at the other end of the outer guide tube 31. The mesh of the first filter screen 32 is relatively large, which can intercept impurity particles with relatively large particle size and realize preliminary filtration of the airflow; An inner flow guide pipe 34 is arranged inside the outer flow guide pipe 31. The inner flow guide pipe 34 is arranged concentrically with the outer flow guide pipe 31, but its outer diameter is smaller than the inner diameter of the outer flow guide pipe 31, so a gap is formed between the two. A second filter screen 35 is arranged at one end of the inner flow guide pipe 34. The mesh of the second filter screen 35 is smaller than the mesh of the first filter screen 32, so that impurities with smaller particle sizes can be intercepted to achieve deeper filtering. The intercepted impurities will be concentrated in the gap between the outer flow guide pipe 31 and the inner flow guide pipe 34. A waste storage pipe 321 is also connected to the outside of the outer flow guide pipe 31. The waste storage pipe 321 can be used to collect impurities, and the valve pipe 322 is used to control the opening and closing of the waste storage pipe 321. When the entire intake system is working normally, the valve pipe 322 is in a closed state. When the impurities need to be cleaned, the valve pipe 322 is opened to facilitate the discharge of the impurities. A driving member and a cleaning member are arranged inside the inner guide tube 34. When air flows inside the inner guide tube 34, a force is generated on the driving member, so that the driving member remains in motion, thereby driving the cleaning member to clean the first filter screen 32, the second filter screen 35, the outer guide tube 31 and the inner guide tube 34, thereby avoiding the first filter screen 32 and the second filter screen 35 from being blocked, ensuring that the air intake system can work for a long time. In addition, the cleaning process must be carried out manually, which is more convenient to use. The first filter screen 32 itself is located at the end of the outer guide tube 31, so the impurities cleaned can directly fall to the outside of the device and will not enter the outer guide tube 31, so there is no need to clean it; the second filter screen 35 is located at the end of the inner guide tube 34, and the impurities cleaned fall into the gap between the outer guide tube 31 and the inner guide tube 34, and then the impurities there are cleaned by the second cleaning part, so that the impurities enter the waste storage pipe 321 to facilitate subsequent deep cleaning.

[0023] In the embodiments of the present invention, please refer to Figure 1 and Figure 2 The motor body 1 includes a flange end cover 11, a housing 13 is fixed at one end of the flange end cover 11, a lower end bearing 12 is installed at the upper end of the flange end cover 11, an upper end cover 19 is also fixed on the housing 12, a stator core 14 is installed inside the housing 13, a groove is provided on the stator core 14, and a winding 17 is embedded in the groove, and the stator core 14, the housing 13 and the winding 17 constitute a stator; A rotating shaft 18 is also rotated at the upper end of the lower end bearing 12, and a rotor core 16 is shrink-fitted on the rotating shaft 18. The rotor core 16 has a groove, and a magnetic steel 15 is embedded in the groove. The rotating shaft 18, the magnetic steel 15 and the rotor core 16 form a rotor; The upper end of the rotating shaft 18 is provided with an upper end bearing 110, a spline is provided on the shaft head of the rotating shaft 18, and a planetary reducer 111 is connected through the spline, and the lower end of the planetary reducer 111 is connected to the housing 13; The wind cover 2 is installed on the outer side of the casing 13 and the planetary reducer 111. The planetary reducer 111 is a single-stage reducer, and the wind cover 2 is a split type, including two symmetrical cover bodies.

[0024] It should be noted that the permanent magnet motor in the device is a 10-14 pole multi-pole motor, which can drive the fan blades to rotate in conjunction with the 1st-level planetary reducer 111, thereby being able to introduce airflow normally. The wind hood 2 is composed of two parts, so it is detachable. For some fine dust that enters the inside of the wind hood 2, it is also more convenient to manually clean it.

[0025] In the embodiments of the present invention, please refer to Figure 6 The driving member includes a positioning frame 37 fixed inside the inner guide tube 34, a transmission shaft 38 is connected to the bearing on the positioning frame 37, the transmission shaft 38 is also concentrically arranged with the inner guide tube 34, and an impeller 39 is also fixed on the transmission shaft 38.

[0026] It should be noted that: among the driving components, the positioning frame 37 is the main positioning structure, which is fixed in the inner guide tube 34 to ensure the stability of the entire structure. At the same time, the positioning frame 37 will not affect the normal circulation of the airflow; the bearing on the positioning frame 37 is connected to the transmission shaft 38, and the bearing connection method can ensure the installation of the transmission shaft 38 and the rotation effect of the transmission shaft 38. The impeller 39 arranged on the transmission shaft 38 is the main power structure. When the airflow circulates normally inside the inner guide tube 34, the airflow can impact on the impeller 39, thereby rotating the impeller 39. When the impeller 39 rotates, it can drive the transmission shaft 38 to rotate together, thereby driving the cleaning component to move, thereby cleaning the first filter 32, the second filter 35 and the inside of the outer guide tube 31, which has an energy-saving effect when used.

[0027] In the embodiments of the present invention, please refer to Figure 6 The first cleaning part includes a first fixing seat 310 fixed on the transmission shaft 38, and a plurality of annularly distributed arc plates 311 are fixed on the outer wall of the first fixing seat 310. The arc plates 311 have first bristles 312 in contact with the second filter screen 35; At the same time, an annular groove 36 is also formed on the circumferential outer wall of the inner flow guide tube 34, and a concentric reinforcing ring frame 313 is arranged outside the inner flow guide tube 34 at a position corresponding to the annular groove 36. A plurality of balls 314 are embedded in the circumferential inner wall of the reinforcing ring frame 313, and the balls 314 are embedded and roll inside the annular groove 36; The other ends of the plurality of arc-shaped plates 311 are fixed on the reinforcing ring frame 313 .

[0028] It should be noted that: the first cleaning part is set for the second filter 35, and its first fixing seat 310 is fixed on the transmission shaft 38, so when the transmission shaft 38 rotates, each arc plate 311 can be driven to rotate through the first fixing seat 310, and the arc plate 311 has a first bristle 312, and the first bristle 312 is in contact with the second filter 35, so when rotating, it can scrape off the impurities attached to the second filter 35 until the impurities are pushed into the gap between the outer guide tube 31 and the inner guide tube 34; The reinforcing ring frame 313 is rotatably mounted on the inner guide tube 34 and is fixed to each arc plate 311, which has a limiting effect on the arc plates 311 to further improve the stability of each arc plate 311. At the same time, when the arc plates 311 rotate along with the transmission shaft 38, the reinforcing ring frame 313 will also be driven to rotate. There is a ball 314 between the reinforcing ring frame 313 and the inner guide tube 34, which can improve the rotation effect of the reinforcing ring frame 313.

[0029] In the embodiments of the present invention, please refer to Figure 7 The second cleaning part includes a spiral bracket 315 fixed on the reinforcing ring frame 313, and the spiral bracket 315 is arranged in the interval between the outer guide tube 31 and the inner guide tube 34. The spiral bracket 315 is also provided with second bristles 316 that contact the inner wall of the outer guide tube 31.

[0030] It should be noted that: for the second cleaning part, its spiral bracket 315 is the main installation structure, and the spiral bracket 315 is fixed on the reinforcing ring frame 313. Therefore, when the reinforcing ring frame 313 rotates, the spiral bracket 315 will also be driven to rotate. The spiral bracket 315 is located in the gap between the outer guide tube 31 and the inner guide tube 34, and a second brush 316 is arranged on the spiral bracket 315. The second brush 316 is in contact with the inner wall of the outer guide tube 31. During the rotation process, it can push the impurities concentrated in the gap to move toward the waste storage pipe 321 until the impurities enter the waste storage pipe 321, and the impurities are stored by the waste storage pipe 321 to facilitate subsequent cleaning.

[0031] In the embodiments of the present invention, please refer to Figure 8 The third cleaning part includes a second fixed seat 317 fixed on the transmission shaft 38, and a plurality of annularly distributed support bars 318 are fixed on the second fixed seat 317. A fixed ring frame 320 is fixed at the other end of the plurality of support bars 318, and a third bristle 319 in contact with the first filter screen 32 is also arranged on the support bar 318.

[0032] It should be noted that: for the third cleaning part, the second fixing seat 317 is fixed on the transmission shaft 38, so when the transmission shaft 38 rotates, the support bar 318 can also be driven to rotate through the second fixing seat 317, and the support bar 318 is provided with a third bristle 319, which is in contact with the first filter screen 32, so that when rotating, the third bristle 319 can remove impurities attached to the first filter screen 32, thereby cleaning the first filter screen 32; A fixed ring frame 320 is connected to the other end of each support bar 318. The fixed ring frame 320 has a positioning function for each support bar 318, further improving the stability of the rod structure.

[0033] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A semi-direct drive permanent magnet motor for a cooling tower, comprising a motor body (1), a wind shield (2) mounted on one side of the motor body (1), and a fan (3) mounted outside the wind shield (2), characterized in that: The fan (3) comprises a fan body and an outer flow guide pipe (31) installed at the air inlet end of the fan body, a first filter screen (32) being installed at the other end of the outer flow guide pipe (31), a concentric inner flow guide pipe (34) being arranged inside the outer flow guide pipe (31) via a fixing ring (33), a gap being provided between the inner flow guide pipe (34) and the outer flow guide pipe (31), a second filter screen (35) being fixed at one end of the inner flow guide pipe (34) close to the outer flow guide pipe (31), and the second filter screen (35) being hemispherical; A driving member is also provided in the inner flow guide tube (34), and a cleaning member is mounted on the driving member. The cleaning member comprises a first cleaning portion, a second cleaning portion and a third cleaning portion, and is used to clean the second filter screen (35), the first filter screen (32) and the inner wall of the outer flow guide tube (31), respectively.

2. The semi-direct drive permanent magnet motor for a cooling tower according to claim 1, characterized in that: The motor body (1) comprises a flange end cover (11), one end of the flange end cover (11) is fixed with a casing (13), a lower end bearing (12) is mounted on the upper end of the flange end cover (11), an upper end cover (19) is also fixed on the casing (13), a stator core (14) is mounted inside the casing (13), the stator core (14) has a groove, and a winding (17) is embedded in the groove, and the stator core (14), the casing (13) and the winding (17) constitute a stator.

3. The semi-direct drive permanent magnet motor for a cooling tower according to claim 2, characterized in that: A rotating shaft (18) is also rotatably disposed at the upper end of the lower end bearing (12), a rotor core (16) is heat-shrinkably mounted on the rotating shaft (18), the rotor core (16) having a groove, and a magnetic steel (15) embedded in the groove; the rotating shaft (18), the magnetic steel (15) and the rotor core (16) constitute a rotor.

4. The semi-direct drive permanent magnet motor for a cooling tower according to claim 3, characterized in that: An upper end bearing (10) is installed at the upper end of the rotating shaft (18); a spline is provided on the shaft head of the rotating shaft (18) and is connected to a planetary reducer (111) via the spline; and the lower end of the planetary reducer (111) is connected to the housing (13); The wind cover (2) is installed on the outside of the casing (13) and the planetary reducer (111); the planetary reducer (111) is a single-stage reducer, and the sealing cover (2) is a split type, comprising two symmetrical cover bodies.

5. The semi-direct drive permanent magnet motor for a cooling tower according to claim 1, characterized in that: The driving member comprises a positioning frame (37) fixed inside the inner flow guide tube (34); a transmission shaft (38) is connected to a bearing on the positioning frame (37); the transmission shaft (38) is also arranged concentrically with the inner flow guide tube (34); and an impeller (39) is also fixed on the transmission shaft (38).

6. The semi-direct drive permanent magnet motor for a cooling tower according to claim 1, characterized in that: The first cleaning portion comprises a first fixing seat (310) fixed on the transmission shaft (38), and a plurality of annularly distributed arc plates (311) are fixed to the circumferential outer wall of the first fixing seat (310), and the arc plates (311) are provided with first bristles (312) in contact with the second filter screen (35).

7. The semi-direct drive permanent magnet motor for a cooling tower according to claim 5, characterized in that: An annular groove (36) is also provided on the circumferential outer wall of the inner flow guide tube (34); a concentric reinforcing ring frame (313) is provided outside the inner flow guide tube (34) at a position corresponding to the annular groove (36); a plurality of balls (314) are embedded in the circumferential inner wall of the reinforcing ring frame (313); the balls (314) are embedded in and roll inside the annular groove (36); The other ends of the plurality of arc-shaped plates (311) are all fixed on the reinforcing ring frame (313).

8. The semi-direct drive permanent magnet motor for a cooling tower according to claim 1, characterized in that: The second cleaning portion comprises a spiral support (315) fixed on the reinforcing ring frame (313); the spiral support (315) is arranged in the interval between the outer flow guide tube (31) and the inner flow guide tube (34); and second bristles (316) in contact with the inner wall of the outer flow guide tube (31) are also arranged on the spiral support (315).

9. The semi-direct drive permanent magnet motor for a cooling tower according to claim 1, characterized in that: The third cleaning portion comprises a second fixing seat (317) fixed on the transmission shaft (38), a plurality of annularly distributed support bars (318) being fixed on the second fixing seat (317), a fixing ring frame (320) being fixed at the other end of the plurality of support bars (318), and third bristles (319) being in contact with the first filter screen (32) being further arranged on the support bars (318).

10. The semi-direct drive permanent magnet motor for a cooling tower according to claim 1, characterized in that: The outer wall of the outer flow guide pipe (31) is also connected to a waste storage pipe (321), and a valve pipe (322) is fixed to the other end of the waste storage pipe (321).

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