Noise reduction device for permanent magnet direct drive motor of vertical coal mill

Abstract

The utility model discloses a noise reduction 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 noise reduction cooling device. A permanent magnet direct drive motor is fixedly mounted at the bottom of the vertical coal mill body; the motor noise reduction cooling device comprises a noise reduction cylinder, an annular sound insulation plate, a water tank, a water cooling water suction pump, a water conveying hose and a water drainage hose, the noise reduction cylinder is slidably connected to the surface of the permanent magnet direct drive motor in a sleeving mode, and the inner wall of the noise reduction cylinder is fixedly connected with the annular sound insulation plate; a groove is formed in the lower side of the vertical coal mill body, the water tank is fixedly connected to the interior of the groove, noise reduction treatment is conducted on the permanent magnet direct drive motor through the annular sound insulation plate, cooling water circularly flows in the spiral flow channel to cool the permanent magnet direct drive motor, and then the noise reduction and cooling effects of the permanent magnet direct drive motor are achieved; and high-temperature damage of the permanent-magnet direct-drive motor is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet direct-drive motors, in particular to a noise reduction 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 machine used for grinding cement raw materials, cement clinker, slag and coal cinder, and has the characteristics of simple structure, low manufacturing and use cost. The vertical coal mill includes a machine body, a grinding disc device and a transmission device. The permanent magnet direct drive motor is the abbreviation of a direct drive motor, which mainly refers to the motor that does not need to pass through a transmission device (such as a transmission belt, etc.) when driving a load. The main benefits of the permanent magnet direct drive motor include energy saving, stability and strong power. The transmission device of the vertical coal mill usually uses a permanent magnet direct drive motor to provide power.

[0003] During operation, permanent magnet direct-drive motors will generate large noises, thus causing large noise pollution. Currently, the existing noise reduction method is usually to set a silencer cover on the outside of the motor. However, the silencer cover is mounted on the surface of the direct-drive motor, which reduces the air flow on the surface of the direct-drive motor, thereby affecting the heat dissipation performance of the 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 noise reduction device for a permanent magnet direct-drive motor of a vertical coal mill, which can solve the problem that the air flow on the surface of the direct-drive motor is reduced, thereby affecting the heat dissipation performance of the direct-drive motor.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a noise reduction device for a permanent magnet direct-drive motor of a vertical coal mill, comprising a vertical coal mill body and a motor noise reduction cooling device; a permanent magnet direct-drive motor is fixedly installed at the bottom of the vertical coal mill body; the motor noise reduction cooling device comprises a noise reduction cylinder, an annular sound insulation board, a water tank, a water-cooled water pump, a water supply hose and a drainage hose, the noise reduction cylinder is slidably sleeved on the surface of the permanent magnet direct-drive motor, the inner wall of the noise reduction cylinder is fixedly connected to the annular sound insulation board, the interior of the noise reduction cylinder is provided with a spiral flow channel, a groove is provided on the lower side of the vertical coal mill body, the water tank is fixedly connected to the inside of the groove, the water-cooled water pump is fixedly installed on the surface of the water tank, one end of the water supply hose is fixedly connected to the output end of the water-cooled water pump, and the other end of the water supply hose is fixedly connected to the surface of the noise reduction cylinder and communicated with the inside of the spiral flow channel.

[0006] Preferably, one end of the drainage hose is fixedly connected to the top of the water tank and communicated with the interior thereof, and the other end of the drainage hose is fixedly connected to the surface of the noise reduction cylinder and communicated with the interior of the spiral flow channel.

[0007] Preferably, two protrusions are fixedly connected to the surface of the vertical coal mill body, and threaded rods are threadedly sleeved inside the two protrusions.

[0008] Preferably, the opposite ends of the two threaded rods are fixedly connected to rotating wheels, and arc grooves are formed on the surfaces of the two rotating wheels.

[0009] Preferably, one opposite end of the two threaded rods is rotatably connected to a moving block, and arc-shaped clamping plates are welded on the surfaces of the two moving blocks.

[0010] Preferably, the two arc-shaped clamping plates are clamped on the surface of the noise reduction cylinder.

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

[0012] (1) In the noise reduction device for the permanent magnet direct-drive motor of the vertical coal mill, cooling water enters the interior of the spiral flow channel and flows in a spiral shape on the surface of the permanent magnet direct-drive motor to cool the heat sink on the surface, and is discharged into the water tank through a drainage hose for internal circulation. At this time, the permanent magnet direct-drive motor can be noise-reduced by the annular sound insulation board, and the permanent magnet direct-drive motor can be cooled by the cooling water circulating in the spiral flow channel, thereby achieving the effect of noise reduction and cooling the permanent magnet direct-drive motor, and avoiding high-temperature damage to the permanent magnet direct-drive motor.

[0013] (2) In the noise reduction device for the permanent magnet direct-drive motor of the vertical coal mill, the moving block moves and drives the arc-shaped clamping plate to move away from the surface of the noise reduction cylinder, so that the fixing effect of the arc-shaped clamping plate on the noise reduction cylinder can be released. The staff can slide the noise reduction cylinder and make it away from the surface of the permanent magnet direct-drive motor to complete the disassembly, which is convenient for the staff to repair the permanent magnet direct-drive motor and improves the convenience of the permanent magnet direct-drive motor maintenance. 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 noise reduction 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 water-cooled water pump of the utility model;

[0017] Figure 3 This is a schematic diagram of the surface structure of the arc-shaped splint of the utility model;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the noise reduction cylinder of the utility model.

[0019] Figure numerals: 1. Vertical coal mill body; 2. Permanent magnet direct drive motor; 3. Noise reduction cylinder; 4. Annular sound insulation board; 5. Spiral flow channel; 6. Groove; 7. Water tank; 8. Water-cooled water pump; 9. Water supply hose; 10. Drain hose; 11. Bump; 12. Threaded rod; 13. Rotor; 14. Arc groove; 15. Moving block; 16. Arc clamp. 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 noise reduction device for a permanent magnet direct-drive motor of a vertical coal mill, comprising a vertical coal mill body 1 and a motor noise reduction cooling device, a permanent magnet direct-drive motor 2 is fixedly installed at the bottom of the vertical coal mill body 1, the motor noise reduction cooling device comprises a noise reduction cylinder 3, an annular sound insulation board 4, a water tank 7, a water-cooled water pump 8, a water delivery hose 9 and a drainage hose 10, the noise reduction cylinder 3 is slidably sleeved on the surface of the permanent magnet direct-drive motor 2, the inner wall of the noise reduction cylinder 3 is fixedly connected with the annular sound insulation board 4, and the interior of the noise reduction cylinder 3 is provided with a spiral flow A groove 6 is provided on the lower side of the vertical coal mill body 1, a water tank 7 is fixedly connected to the inside of the groove 6, a water-cooled water pump 8 is fixedly installed on the surface of the water tank 7, one end of a water hose 9 is fixedly connected to the output end of the water-cooled water pump 8, the other end of the water hose 9 is fixedly connected to the surface of the noise reduction cylinder 3 and communicated with the inside of the spiral flow channel 5, one end of a drainage hose 10 is fixedly connected to the top of the water tank 7 and communicated with the inside thereof, the other end of the drainage hose 10 is fixedly connected to the surface of the noise reduction cylinder 3 and communicated with the inside of the spiral flow channel 5.

[0025] When the vertical coal mill permanent magnet direct drive motor noise reduction device is in use, the noise generated by the permanent magnet direct drive motor 2 is first reduced by the annular sound insulation plate 4. At this time, the water-cooled water pump 8 draws cooling water from the inside of the water tank 7 and discharges it into the inside of the spiral flow channel 5 through the water supply hose 9. The cooling water enters the inside of the spiral flow channel 5 and flows in a spiral shape on the surface of the permanent magnet direct drive motor 2 to cool the heat sink on its surface, and is discharged into the inside of the water tank 7 through the drainage hose 10 for recycling. At this time, the permanent magnet direct drive motor 2 can be reduced in noise by the annular sound insulation plate 4, and the permanent magnet direct drive motor 2 can be cooled by the circulation of cooling water in the spiral flow channel 5, thereby achieving the effect of noise reduction and cooling of the permanent magnet direct drive motor 2, and avoiding high-temperature damage to the permanent magnet direct drive motor 2.

[0026] Two protrusions 11 are fixedly connected to the surface of the vertical coal mill body 1, and threaded rods 12 are threadedly sleeved inside the two protrusions 11. The opposite ends of the two threaded rods 12 are fixedly connected to runners 13. The surfaces of the two runners 13 are provided with arc grooves 14. The opposite ends of the two threaded rods 12 are rotatably connected to moving blocks 15. Arc clamping plates 16 are welded on the surfaces of the two moving blocks 15, and the two arc clamping plates 16 are clamped on the surface of the noise reduction cylinder 3.

[0027] When the permanent magnet direct drive motor 2 needs to be overhauled, the staff rotates the rotating wheel 13 and drives the threaded rod 12 to rotate inside the protrusion 11. The threaded rod 12 rotates and drives the moving block 15 to move through the threaded connection with the protrusion 11. The moving block 15 moves and drives the arc-shaped clamping plate 16 to move away from the surface of the noise reduction cylinder 3, so that the fixing effect of the arc-shaped clamping plate 16 on the noise reduction cylinder 3 can be released. The staff slides the noise reduction cylinder 3 and separates it from the surface of the permanent magnet direct drive motor 2 to complete the disassembly, which is convenient for the staff to overhaul the permanent magnet direct drive motor 2 and improves the convenience of overhauling the permanent magnet direct drive motor 2.

[0028] Working principle: The noise reduction device of the permanent magnet direct-drive motor of the vertical coal mill first reduces the noise generated by the permanent magnet direct-drive motor 2 through the annular sound insulation plate 4. At this time, the water-cooled water pump 8 draws cooling water from the inside of the water tank 7 and discharges it into the inside of the spiral flow channel 5 through the water supply hose 9. The cooling water enters the inside of the spiral flow channel 5 and flows in a spiral shape on the surface of the permanent magnet direct-drive motor 2 to cool the heat sink on its surface, and is discharged into the inside of the water tank 7 through the drainage hose 10 for recycling, thereby achieving the effect of noise reduction and cooling the permanent magnet direct-drive motor 2. The staff rotates the wheel 13 and drives the threaded rod 12 to rotate inside the protrusion 11. The threaded rod 12 rotates and drives the moving block 15 to move through the threaded connection between the protrusion 11. The moving block 15 moves and drives the arc clamping plate 16 to move away from the surface of the noise reduction cylinder 3. The staff slides the noise reduction cylinder 3 and makes it separate from the surface of the permanent magnet direct-drive motor 2 to complete the disassembly, which is convenient for the staff to inspect and 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 noise reduction 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 noise reduction cooling device; A permanent magnet direct drive motor (2) is fixedly mounted on the bottom of the vertical coal mill body (1); The motor noise reduction cooling device comprises a noise reduction cylinder (3), an annular sound insulation board (4), a water tank (7), a water-cooled water pump (8), a water delivery hose (9) and a drainage hose (10); the noise reduction cylinder (3) is slidably sleeved on the surface of the permanent magnet direct drive motor (2); the inner wall of the noise reduction cylinder (3) is fixedly connected to the annular sound insulation board (4); a spiral flow channel (5) is provided inside the noise reduction cylinder (3); a groove (6) is provided on the lower side of the vertical coal mill body (1); the water tank (7) is fixedly connected to the inside of the groove (6); the water-cooled water pump (8) is fixedly installed on the surface of the water tank (7); one end of the water delivery hose (9) is fixedly connected to the output end of the water-cooled water pump (8); and the other end of the water delivery hose (9) is fixedly connected to the surface of the noise reduction cylinder (3) and communicated with the inside of the spiral flow channel (5).

2. A noise reduction device for a permanent magnet direct-drive motor of a vertical coal mill according to claim 1, characterized in that: One end of the drainage hose (10) is fixedly connected to the top of the water tank (7) and communicates with the interior thereof, and the other end of the drainage hose (10) is fixedly connected to the surface of the noise reduction cylinder (3) and communicates with the interior of the spiral flow channel (5).

3. A noise reduction device for a permanent magnet direct-drive motor of a vertical coal mill according to claim 1, characterized in that: Two protrusions (11) are fixedly connected to the surface of the vertical coal mill body (1), and threaded rods (12) are threadedly sleeved inside the two protrusions (11).

4. A noise reduction device for a permanent magnet direct-drive motor of a vertical coal mill according to claim 3, characterized in that: The opposite ends of the two threaded rods (12) are fixedly connected to a rotating wheel (13), and the surfaces of the two rotating wheels (13) are provided with an arc groove (14).

5. The noise reduction device for a permanent magnet direct-drive motor of a vertical coal mill according to claim 3 is characterized in that: The opposite ends of the two threaded rods (12) are rotatably connected to a moving block (15), and arc-shaped clamping plates (16) are welded to the surfaces of the two moving blocks (15).

6. A noise reduction device for a permanent magnet direct-drive motor of a vertical coal mill according to claim 5, characterized in that: The two arc-shaped clamping plates (16) are both clamped on the surface of the noise reduction cylinder (3).

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