A coal mill motor cooling and energy-saving system

Abstract

This utility model discloses a coal mill motor cooling and energy-saving system, including a drive motor and a centrifugal fan. The drive motor is located at the air outlet of the centrifugal fan, and a conical air guide shroud is fixedly connected to the air outlet of the centrifugal fan. The conical air guide shroud has openings at both ends. The drive motor is installed in the conical air guide shroud and is driven by the centrifugal fan through a transmission mechanism. The centrifugal fan includes a casing, a filter plate, a first rotating shaft, and an impeller. The filter plate is fixedly connected to the casing and is located at the air inlet of the centrifugal fan. The first rotating shaft is rotatably connected between the filter plate and the casing, and an impeller is installed on the first rotating shaft. This utility model optimizes airflow to better dissipate heat and cool the drive motor, reduces the loss of the centrifugal fan, and eliminates the need for additional power supply equipment, further reducing losses.

Description

Technical Field

[0001] This utility model relates to the field of coal mill motor cooling technology, and in particular to a coal mill motor cooling and energy-saving system. Background Technology

[0002] Coal mills are core equipment in industrial sectors such as thermal power plants and cement plants, used to grind raw coal into pulverized coal for combustion or production. Coal mill motors operate under high loads for extended periods, making them prone to insulation aging and efficiency reduction due to high temperatures. Traditional cooling methods include natural air cooling relying on the motor's outer casing heat sink, forced air cooling with an independent cooling fan, and water cooling with an external circulating water system. While these methods provide some cooling, they still have certain shortcomings. In traditional coal mill motor cooling methods, natural air cooling has poor heat dissipation effect, forced air cooling has high energy consumption, and water cooling has a complex structure and high maintenance cost. Therefore, existing methods for cooling coal mill motors need to ensure good heat dissipation and reduce losses. Therefore, it is necessary to design a coal mill motor cooling and energy-saving system. Utility Model Content

[0003] The purpose of this invention is to provide a coal mill motor cooling and energy-saving system to solve the problems of ensuring good heat dissipation and cooling and reducing losses when cooling coal mill motors.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a coal mill motor cooling and energy saving system, including a drive motor and a centrifugal fan, wherein the drive motor is located at the air outlet of the centrifugal fan, and the drive motor is cooled by air supplied by the centrifugal fan. The centrifugal fan has a conical air guide shroud fixedly connected to its air outlet. The conical air guide shroud is open at both ends. The drive motor is installed in the conical air guide shroud. The conical air guide shroud guides the air outlet of the centrifugal fan to flow along the surface of the drive motor, thereby reducing wind energy loss. The drive motor is connected to the centrifugal fan through a transmission mechanism. The centrifugal fan operates by utilizing the output of the drive motor, eliminating the need for external power supply equipment.

[0005] As a further technical solution of this utility model, the centrifugal fan includes a casing, a filter plate, a first rotating shaft, and an impeller; A filter plate is fixedly connected in the casing. The filter plate is located at the air inlet of the centrifugal fan. A first rotating shaft is rotatably connected between the filter plate and the casing. An impeller is installed on the first rotating shaft. The rotation of the impeller draws in outside cold air from the air inlet of the centrifugal fan and sends it out from the air outlet of the centrifugal fan. The filter plate blocks impurities from contaminating the impeller.

[0006] As a further technical solution of this utility model, the transmission mechanism includes a first helical gear, a second helical gear, a second rotating shaft, a first pulley, a transmission belt, a second pulley, a third rotating shaft, and a protective cover; The first helical gear is mounted on the drive shaft of the drive motor. The first helical gear meshes with the second helical gear. When the drive motor drives the coal mill to rotate, it synchronously drives the first helical gear to rotate, and then the first helical gear transmits kinetic energy to the second helical gear. The second helical gear and the first pulley are both fixedly connected to the second rotating shaft. The rotation of the second helical gear drives the second rotating shaft and the first pulley to rotate. The second pulley is fixedly connected to the third rotating shaft; The first pulley and the second pulley are connected by the transmission belt, and the transmission belt causes the second pulley to follow the movement of the first pulley. Both the second rotating shaft and the third rotating shaft are rotatably connected to the protective cover; The third rotating shaft passes through the housing and is fixedly connected to the first rotating shaft. The third rotating shaft and the housing are rotatably coupled. The third rotating shaft moves synchronously with the second pulley. The movement of the third rotating shaft drives the first rotating shaft to move, thereby causing the impeller mounted on the first rotating shaft to rotate.

[0007] As a further technical solution of this utility model, a spiral guide vane is provided on the inner wall of the conical air guide shroud. The spiral guide vane has no contact with the drive motor. The spiral guide vane guides the wind in the conical air guide shroud to surround the drive motor. The spiraling wind can evenly cover the surface of the drive motor for heat dissipation.

[0008] As a further technical solution of this utility model, the second rotating shaft passes through the second helical gear and is rotatably connected to a connecting member. The connecting member is fixedly connected to the mounting plate, and the mounting plate and the connecting member provide support for the second rotating shaft. The protective cover is fixedly connected to the mounting plate, which provides support for the protective cover.

[0009] As a further technical solution of this utility model, the conical air guide is fixedly connected to the mounting plate, and the mounting plate provides support for the conical air guide.

[0010] As a further technical solution of this utility model, the conical air guide shroud is connected to the centrifugal fan. The smaller diameter opening end of the conical air guide shroud is located at the drive end of the drive motor. The structural design of the conical air guide shroud utilizes the Venturi effect, which makes the wind speed at the drive end of the drive motor faster, thereby increasing or decreasing forced convection heat dissipation.

[0011] The present invention provides a coal mill motor cooling and energy-saving system, the advantages of which are: through... When the drive motor drives the coal mill to work, the drive centrifugal fan delivers air for air cooling. A conical air guide shroud is set around the drive motor. The smaller opening end of the conical air guide shroud is located at the drive end of the drive motor. The structural design of the conical air guide shroud utilizes the Venturi effect to make the air velocity at the drive end of the drive motor faster, thereby increasing forced convection cooling. At the same time, the spiral guide vanes set on the inner wall of the conical air guide shroud can guide the air in the conical air guide shroud to surround the drive motor. The spiraling air can evenly cover the surface of the drive motor for heat dissipation. By optimizing the airflow, the drive motor can be better cooled, and the losses of the centrifugal fan can be reduced. Furthermore, the centrifugal fan does not require additional power supply equipment, further reducing losses. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the position of the protective cover in this utility model; Figure 3 This is an exploded view of part of the structure of this utility model; Figure 4 for Figure 3 Enlarged view of the local structure of region A in the middle.

[0014] In the diagram: 1. Drive motor; 2. Centrifugal fan; 21. Casing; 22. Filter plate; 23. First rotating shaft; 24. Impeller; 3. Conical air guide shroud; 31. Spiral air guide vane; 4. Transmission mechanism; 41. First helical gear; 42. Second helical gear; 43. Second rotating shaft; 44. First pulley; 45. Transmission belt; 46. Second pulley; 47. Third rotating shaft; 48. Protective cover; 5. Connectors; 6. Mounting plate. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Please see the appendix Figure 1 - Appendix Figure 4 This utility model provides an embodiment of a coal mill motor cooling and energy-saving system, including a drive motor 1 and a centrifugal fan 2. The drive motor 1 is located at the air outlet of the centrifugal fan 2. The centrifugal fan 2 delivers air to the drive motor 1 for air cooling. The centrifugal fan 2 includes a housing 21, a filter plate 22, a first rotating shaft 23, and an impeller 24. The filter plate 22 is fixedly connected in the housing 21 and is located at the air inlet of the centrifugal fan 2. The first rotating shaft 23 is rotatably connected between the filter plate 22 and the housing 21. The impeller 24 is installed on the first rotating shaft 23. The rotation of the impeller 24 draws in cold air from the air inlet of the centrifugal fan 2 and sends it out from the air outlet of the centrifugal fan 2. The filter plate 22 blocks impurities from contaminating the impeller 24. A conical air guide shroud 3 is fixedly connected to the air outlet of the centrifugal fan 2. The conical air guide shroud 3 has openings at both ends. The drive motor 1 is installed in the conical air guide shroud 3. The air outlet of the centrifugal fan 2 is guided by the conical air guide shroud 3 to flow along the surface of the drive motor 1, reducing wind energy loss. A spiral guide vane 31 is provided on the inner wall of the conical air guide shroud 3. The spiral guide vane 31 does not contact the drive motor 1. The spiral guide vane 31 guides the air in the conical air guide shroud 3 to surround the drive motor 1. The spirally advancing air can evenly cover the surface of the drive motor 1 for heat dissipation. The conical air guide shroud 3 is connected to the centrifugal fan 2. The smaller diameter opening end of the conical air guide shroud 3 is located at the drive end of the drive motor 1. The structural design of the conical air guide shroud 3 utilizes the Venturi effect, which makes the wind speed at the drive end of the drive motor 1 faster, increasing forced convection heat dissipation. The drive motor 1 drives the centrifugal fan 2 via the transmission mechanism 4. The centrifugal fan 2 operates by utilizing the output of the drive motor 1, eliminating the need for an external power supply. The transmission mechanism 4 includes a first helical gear 41, a second helical gear 42, a second rotating shaft 43, a first pulley 44, a transmission belt 45, a second pulley 46, a third rotating shaft 47, and a protective cover 48. The first helical gear 41 is mounted on the drive shaft of the drive motor 1 and meshes with the second helical gear 42. When the drive motor 1 drives the coal mill to rotate, it synchronously drives the first helical gear 41 to rotate, and then the first helical gear 41 transmits kinetic energy to the second helical gear 42. The second helical gear 42 and the first pulley 44 are both fixedly connected to the second rotating shaft 47. On the 3rd, the rotation of the second helical gear 42 drives the second rotating shaft 43 and the first pulley 44 to rotate. The second pulley 46 is fixedly connected to the third rotating shaft 47. The first pulley 44 and the second pulley 46 are connected by a transmission belt 45. The transmission belt 45 causes the second pulley 46 to follow the first pulley 44. The second rotating shaft 43 and the third rotating shaft 47 are both rotatably connected to the protective cover 48. The third rotating shaft 47 passes through the housing 21 and is fixedly connected to the first rotating shaft 23. The third rotating shaft 47 and the housing 21 are rotatably engaged. The third rotating shaft 47 moves synchronously with the second pulley 46. The movement of the third rotating shaft 47 drives the first rotating shaft 23 to move, thereby causing the impeller 24 installed on the first rotating shaft 23 to rotate. The second rotating shaft 43 passes through the second helical gear 42 and is rotatably connected to the connector 5. The connector 5 is fixedly connected to the mounting plate 6. The protective cover 48 is fixedly connected to the mounting plate 6. The conical air guide 3 is fixedly connected to the mounting plate 6. The mounting plate 6 provides support for the connector 5, the protective cover 48 and the conical air guide 3.

[0018] Specifically, in use, when the drive motor 1 is working to drive the coal mill, it synchronously drives the first helical gear 41 to rotate. Then, the first helical gear 41 transmits kinetic energy to the second helical gear 42. The rotation of the second helical gear 42 drives the second rotating shaft 43 and the first pulley 44 to rotate. Through the transmission belt 45, the second pulley 46 moves with the first pulley 44. The third rotating shaft 47 moves synchronously with the second pulley 46. The movement of the third rotating shaft 47 drives the first rotating shaft 23 to move, thereby causing the impeller 24 installed on the first rotating shaft 23 to rotate. The rotation of the impeller 24 draws in cold air from the air inlet of the centrifugal fan 2 and sends it out from the air outlet of the centrifugal fan 2. The filter plate 22 blocks impurities from contaminating the impeller 24. The centrifugal fan 2 delivers air to cool the drive motor 1. The smaller opening of the conical air guide shroud 3 is located at the drive end of the drive motor 1. The structural design of the conical air guide shroud 3 utilizes the Venturi effect, resulting in a higher wind speed at the drive end of the drive motor 1, which increases forced convection cooling. At the same time, the spiral guide vanes 31 on the inner wall of the conical air guide shroud 3 can guide the air in the conical air guide shroud 3 to surround the drive motor 1. The spiraling air can evenly cover the surface of the drive motor 1 for heat dissipation. By optimizing the airflow, the drive motor 1 can be better cooled, and the loss of the centrifugal fan 2 can be reduced. Moreover, the centrifugal fan 2 does not need to be connected to other power supply equipment, further reducing losses.

[0019] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A coal mill motor cooling and energy-saving system, comprising a drive motor (1) and a centrifugal fan (2), characterized in that: The drive motor (1) is located at the air outlet of the centrifugal fan (2); The centrifugal fan (2) has a conical air guide shroud (3) fixedly connected to its air outlet. The conical air guide shroud (3) has openings at both ends. The drive motor (1) is installed in the conical air guide shroud (3). The drive motor (1) drives the centrifugal fan (2) through the transmission mechanism (4).

2. The coal mill motor cooling and energy-saving system according to claim 1, characterized in that: The centrifugal fan (2) includes a casing (21), a filter plate (22), a first rotating shaft (23), and an impeller (24). A filter plate (22) is fixedly connected in the housing (21). The filter plate (22) is located at the air inlet of the centrifugal fan (2). A first rotating shaft (23) is rotatably connected between the filter plate (22) and the housing (21). An impeller (24) is installed on the first rotating shaft (23).

3. The coal mill motor cooling and energy-saving system according to claim 2, characterized in that: The transmission mechanism (4) includes a first helical gear (41), a second helical gear (42), a second rotating shaft (43), a first pulley (44), a transmission belt (45), a second pulley (46), a third rotating shaft (47), and a protective cover (48). The first helical gear (41) is mounted on the drive shaft of the drive motor (1), and the first helical gear (41) meshes with the second helical gear (42); The second helical gear (42) and the first pulley (44) are both fixedly connected to the second rotating shaft (43); The second pulley (46) is fixedly connected to the third rotating shaft (47); The first pulley (44) and the second pulley (46) are connected by the drive belt (45); The second rotating shaft (43) and the third rotating shaft (47) are both rotatably connected to the protective cover (48); The third rotating shaft (47) passes through the housing (21) and is fixedly connected to the first rotating shaft (23). The third rotating shaft (47) and the housing (21) are in rotational engagement.

4. The coal mill motor cooling and energy-saving system according to claim 1, characterized in that: The inner wall of the conical air guide shroud (3) is provided with a spiral guide vane (31), which has no contact with the drive motor (1).

5. The coal mill motor cooling and energy-saving system according to claim 3, characterized in that: The second rotating shaft (43) passes through the second helical gear (42) and is rotatably connected to a connector (5), which is fixedly connected to the mounting plate (6); The protective cover (48) is fixedly connected to the mounting plate (6).

6. The coal mill motor cooling and energy-saving system according to claim 1, characterized in that: The conical air guide shroud (3) is fixedly connected to the mounting plate (6).

7. The coal mill motor cooling and energy-saving system according to claim 1, characterized in that: The conical air guide shroud (3) is connected to the centrifugal fan (2), and the smaller diameter opening end of the conical air guide shroud (3) is located at the drive end of the drive motor (1).

Images