Cooling device for permanent magnet direct drive motor of vertical coal mill

Abstract

The utility model discloses a cooling device for a permanent magnet direct drive motor of a vertical coal mill, which relates to the technical field of permanent magnet direct drive motors and comprises a vertical coal mill body and a motor cooling device. A permanent magnet direct drive motor is fixedly mounted on the surface of the vertical coal mill body; the motor cooling device comprises a cooling cylinder, three connecting pipes, a heat dissipation fan, a first exhaust pipe and a second exhaust pipe, the cooling cylinder is slidably arranged on the surface of the permanent magnet direct drive motor in a sleeving mode, the interior of the cooling cylinder is of a hollow structure, and exhaust holes are evenly formed in the inner wall of the cooling cylinder; the three connecting pipes are fixedly welded to the surface of the cooling cylinder and communicate with the interior of the cooling cylinder, a mounting groove is formed in the lower side of the vertical coal mill body, and cooling air can be rapidly diffused in the cooling cylinder and blown to the surfaces of heat dissipation fins on the surface of the permanent magnet direct drive motor through exhaust holes through the design of the three connecting pipes; therefore, the heat dissipation effect of the permanent magnet direct drive motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet direct-drive motors, in particular to a cooling device for a permanent magnet direct-drive motor of a vertical coal mill. Background Art

[0002] In the prior art, a vertical coal mill is a kind of mill used for grinding cement raw materials, cement clinker, slag and coal cinder, and has the characteristics of simple structure, low manufacturing and use costs. The vertical coal mill includes a body, a grinding disc device and a transmission device. The permanent magnet direct drive motor is an important component of the transmission device, and is characterized by high efficiency, high power factor, small size, light weight, good operating reliability and environmental adaptability, high reliability and low maintenance cost.

[0003] At present, most of the existing permanent magnet direct drive motors are of closed structure. When in use, the permanent magnet direct drive motor dissipates heat through the cooling fins on the outside of the casing. Since the vertical coal mill has a large power when working, the permanent magnet direct drive motor needs to provide a large power. However, the permanent magnet direct drive motor has a low heat dissipation efficiency only through the cooling fins, and the heat dissipation effect is relatively general. Therefore, it is difficult to meet the heat dissipation requirements of the permanent magnet direct drive motor. When the permanent magnet direct drive motor dissipates heat slowly, it is easy to generate high temperature, which affects the normal use of the permanent magnet direct drive motor. Utility Model Content

[0004] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a cooling device for a permanent magnet direct-drive motor of a vertical coal mill, which can solve the problem that the permanent magnet direct-drive motor has low heat dissipation efficiency only through cooling fins and the heat dissipation effect is relatively general, and therefore it is difficult to meet the heat dissipation requirements of the permanent magnet direct-drive motor.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cooling device for a permanent magnet direct-drive motor of a vertical coal mill, comprising a vertical coal mill body and a motor cooling device; a permanent magnet direct-drive motor is fixedly installed on the surface of the vertical coal mill body; the motor cooling device comprises a cooling cylinder, three connecting pipes, a heat dissipation fan, a first exhaust duct and a second exhaust duct, the cooling cylinder is slidably sleeved on the surface of the permanent magnet direct-drive motor, the interior of the cooling cylinder is a hollow structure, exhaust holes are evenly opened on the inner wall of the cooling cylinder, the three connecting pipes are fixedly welded to the surface of the cooling cylinder and are connected with the interior thereof, an installation groove is opened on the lower side of the vertical coal mill body, the heat dissipation fan is fixedly installed inside the installation groove, the first exhaust duct is fixedly connected to the exhaust port of the heat dissipation fan, a card slot is opened at one end of the first exhaust duct away from the heat dissipation fan, the second exhaust duct is slidably installed inside the card slot and is connected with the first exhaust duct, and the three connecting pipes are welded on the surface of the second exhaust duct and are connected with the interior thereof.

[0006] Preferably, heat dissipation fins are fixedly connected to the surface of the permanent magnet direct drive motor, and the heat dissipation fins are distributed in a circular and equidistant manner on the surface of the permanent magnet direct drive motor.

[0007] Preferably, two slide grooves are provided inside the second exhaust duct, and an L-shaped pressing plate is slidably connected inside the slide groove.

[0008] Preferably, a spring is fixedly connected to the surface of the L-shaped pressure plate, and one end of the spring away from the L-shaped pressure plate is fixedly connected to the inner wall of the slide groove.

[0009] Preferably, an arc-shaped clamping plate is fixedly connected to the surface of the L-shaped pressure plate, and the interiors of the two sliding grooves are provided with the same structure.

[0010] Preferably, two arc-shaped clamping holes are provided on the surface of the first exhaust duct, and two arc-shaped clamping plates are respectively clamped in the inside of the two arc-shaped clamping holes.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) The cooling device for the permanent magnet direct-drive motor of the vertical coal mill is designed with three connecting pipes so that the cooling air can be quickly diffused inside the cooling cylinder and blown to the surface of the heat dissipation fins on the surface of the permanent magnet direct-drive motor through the exhaust holes, thereby cooling the permanent magnet direct-drive motor, thereby improving the heat dissipation effect of the permanent magnet direct-drive motor, and thus meeting the heat dissipation requirements of the permanent magnet direct-drive motor, avoiding the generation of high temperature, and ensuring the normal use of the permanent magnet direct-drive motor.

[0013] (2) In the cooling device for the permanent magnet direct-drive motor of the vertical coal mill, maintenance personnel can disassemble the device by sliding the second exhaust duct and disengaging it from the inside of the slot. The second exhaust duct slides and drives the cooling cylinder to slide away from the surface of the permanent magnet direct-drive motor through the three connecting pipes. By designing the cooling cylinder as a detachable structure, it is convenient for maintenance personnel to repair the permanent magnet direct-drive motor, thereby improving the convenience of repairing the permanent magnet direct-drive motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 This is a schematic diagram of the overall structure of a cooling device for a permanent magnet direct-drive motor of a vertical coal mill according to the utility model;

[0016] Figure 2 This is a schematic diagram of the surface structure of the heat dissipation fan of the utility model;

[0017] Figure 3 This is a schematic diagram of the surface structure of the cooling cylinder of the utility model;

[0018] Figure 4It is a schematic diagram of the cross-sectional structure of the second exhaust duct of the utility model.

[0019] Figure numerals: 1. vertical coal mill body; 2. permanent magnet direct drive motor; 3. cooling fins; 4. cooling cylinder; 5. exhaust holes; 6. connecting pipe; 7. mounting slot; 8. cooling fan; 9. first exhaust duct; 10. clamping slot; 11. second exhaust duct; 12. slide slot; 13. L-shaped pressure plate; 14. spring; 15. arc clamping plate; 16. arc clamping hole. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] See also Figure 1-4The utility model provides a technical solution: a cooling device for a permanent magnet direct-drive motor of a vertical coal mill, comprising a vertical coal mill body 1 and a motor cooling device, a permanent magnet direct-drive motor 2 is fixedly mounted on the surface of the vertical coal mill body 1, a heat dissipation fin 3 is fixedly connected to the surface of the permanent magnet direct-drive motor 2, the heat dissipation fin 3 is distributed in a circular manner and equidistantly on the surface of the permanent magnet direct-drive motor 2, the motor cooling device comprises a cooling cylinder 4, three connecting pipes 6, a heat dissipation fan 8, a first exhaust pipe 9 and a second exhaust pipe 11, the cooling cylinder 4 is slidably sleeved on the surface of the permanent magnet direct-drive motor 2, and the interior of the cooling cylinder 4 It is a hollow structure, and the inner wall of the cooling cylinder 4 is evenly provided with exhaust holes 5. Three connecting pipes 6 are fixedly welded on the surface of the cooling cylinder 4 and are connected with the interior thereof. A mounting groove 7 is provided on the lower side of the vertical coal mill body 1, and the heat dissipation fan 8 is fixedly installed inside the mounting groove 7. The first exhaust pipe 9 is fixedly connected with the exhaust port of the heat dissipation fan 8. A slot 10 is provided at one end of the first exhaust pipe 9 away from the heat dissipation fan 8. The second exhaust pipe 11 is slidably installed inside the slot 10 and is connected with the first exhaust pipe 9. The three connecting pipes 6 are welded on the surface of the second exhaust pipe 11 and are connected with the interior thereof.

[0025] During the operation of the permanent magnet direct drive motor 2, the heat dissipation fan 8 first discharges the cooling air into the first exhaust duct 9 and the second exhaust duct 11. After the cooling air enters the second exhaust duct 11, it is discharged into the cooling cylinder 4 through the three connecting pipes 6. The design of the three connecting pipes 6 allows the cooling air to quickly diffuse inside the cooling cylinder 4 and blow to the surface of the heat dissipation fins 3 on the surface of the permanent magnet direct drive motor 2 through the exhaust holes 5, thereby cooling the permanent magnet direct drive motor 2, thereby improving the heat dissipation effect of the permanent magnet direct drive motor 2, and thus meeting the heat dissipation requirements of the permanent magnet direct drive motor 2, avoiding the generation of high temperatures, and ensuring the normal use of the permanent magnet direct drive motor 2.

[0026] Two slide grooves 12 are provided inside the second exhaust duct 11, and an L-shaped pressure plate 13 is slidably connected inside the slide groove 12. A spring 14 is fixedly connected to the surface of the L-shaped pressure plate 13. One end of the spring 14 away from the L-shaped pressure plate 13 is fixedly connected to the inner wall of the slide groove 12, and an arc-shaped clamping plate 15 is fixedly connected to the surface of the L-shaped pressure plate 13. The interiors of the two slide grooves 12 are provided with the same structure, and two arc-shaped clamping holes 16 are provided on the surface of the first exhaust duct 9. The two arc-shaped clamping plates 15 are respectively clamped in the insides of the two arc-shaped clamping holes 16.

[0027] When the permanent magnet direct drive motor 2 needs to be repaired, the maintenance personnel press the two L-shaped pressure plates 13 and squeeze the spring 14 at the same time with their fingers. The two L-shaped pressure plates 13 slide and drive the two arc-shaped clamping plates 15 to slide relative to each other and slide out of the arc-shaped clamping holes 16, so that the first exhaust duct 9 and the second exhaust duct 11 can be released from the fixing effect. At this time, the maintenance personnel slide the second exhaust duct 11 and disengage it from the inside of the clamping slot 10 to complete the disassembly. The second exhaust duct 11 slides and drives the cooling cylinder 4 to slide away from the surface of the permanent magnet direct drive motor 2 through the three connecting tubes 6. By designing the cooling cylinder 4 as a detachable structure, it is convenient for maintenance personnel to repair the permanent magnet direct drive motor 2, thereby improving the convenience of repairing the permanent magnet direct drive motor 2.

[0028] Working principle: In the cooling device of the permanent magnet direct-drive motor of the vertical coal mill, the heat dissipation fan 8 first discharges the cooling air into the first exhaust duct 9 and the second exhaust duct 11. After the cooling air enters the second exhaust duct 11, it is discharged into the interior of the cooling cylinder 4 through three connecting pipes 6. The design of the three connecting pipes 6 can make the cooling air quickly diffuse inside the cooling cylinder 4 and blow to the surface of the heat dissipation fins 3 on the surface of the permanent magnet direct-drive motor 2 through the exhaust holes 5, thereby cooling the permanent magnet direct-drive motor 2. The maintenance personnel press the two L-shaped pressure plates 13 and squeeze the spring 14 at the same time with their fingers. The two L-shaped pressure plates 13 slide and drive the two arc-shaped clamping plates 15 to slide relative to each other and slide out of the arc-shaped clamping holes 16. The maintenance personnel slide the second exhaust duct 11 and disengage it from the interior of the clamping slot 10 to complete the disassembly. The second exhaust duct 11 slides and drives the cooling cylinder 4 to slide and disengage from the surface of the permanent magnet direct-drive motor 2 through the three connecting pipes 6, which is convenient for the maintenance personnel to repair the permanent magnet direct-drive motor 2.

[0029] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A cooling device for a permanent magnet direct-drive motor of a vertical coal mill, characterized in that: include: A vertical coal mill body (1) and a motor cooling device; A permanent magnet direct drive motor (2) is fixedly mounted on the surface of the vertical coal mill body (1); The motor cooling device comprises a cooling cylinder (4), three connecting pipes (6), a heat dissipation fan (8), a first exhaust pipe (9) and a second exhaust pipe (11); the cooling cylinder (4) is slidably mounted on the surface of the permanent magnet direct drive motor (2); the interior of the cooling cylinder (4) is a hollow structure; exhaust holes (5) are evenly arranged on the inner wall of the cooling cylinder (4); the three connecting pipes (6) are fixedly welded to the surface of the cooling cylinder (4) and are in communication with the interior thereof; a mounting groove (7) is arranged on the lower side of the vertical coal mill body (1); the heat dissipation fan (8) is fixedly mounted inside the mounting groove (7); the first exhaust pipe (9) is fixedly connected to the exhaust port of the heat dissipation fan (8); a clamping groove (10) is arranged at one end of the first exhaust pipe (9) away from the heat dissipation fan (8); the second exhaust pipe (11) is slidably mounted inside the clamping groove (10) and is in communication with the first exhaust pipe (9); and the three connecting pipes (6) are welded to the surface of the second exhaust pipe (11) and are in communication with the interior thereof.

2. A cooling device for a permanent magnet direct-drive motor of a vertical coal mill according to claim 1, characterized in that: The surface of the permanent magnet direct drive motor (2) is fixedly connected with heat dissipation fins (3), and the heat dissipation fins (3) are distributed in a circular manner and at equal intervals on the surface of the permanent magnet direct drive motor (2).

3. A cooling device for a permanent magnet direct-drive motor of a vertical coal mill according to claim 1, characterized in that: Two slide grooves (12) are provided inside the second exhaust duct (11), and an L-shaped pressing plate (13) is slidably connected inside the slide groove (12).

4. A cooling device for a permanent magnet direct-drive motor of a vertical coal mill according to claim 3, characterized in that: A spring (14) is fixedly connected to the surface of the L-shaped pressing plate (13), and one end of the spring (14) away from the L-shaped pressing plate (13) is fixedly connected to the inner wall of the sliding groove (12).

5. A cooling device for a permanent magnet direct-drive motor of a vertical coal mill according to claim 4, characterized in that: An arc-shaped clamping plate (15) is fixedly connected to the surface of the L-shaped pressing plate (13), and the interiors of the two sliding grooves (12) are provided with the same structure.

6. A cooling device for a permanent magnet direct-drive motor of a vertical coal mill according to claim 5, characterized in that: Two arc-shaped clamping holes (16) are provided on the surface of the first exhaust pipe (9), and two arc-shaped clamping plates (15) are respectively clamped inside the two arc-shaped clamping holes (16).

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