Low-noise top cover of open high-speed high-efficiency box motor

Abstract

The present application relates to a kind of low-noise top cover of high-speed high-efficiency box motor of opening type, including cover body being installed in the top of motor base, air inlet duct and air outlet duct are arranged in cover body, air inlet duct is separated from air outlet duct by partition plate fixed in cover body, the gas flow direction of air duct on the two sides of partition plate is opposite;Air inlet duct includes S-shaped air duct and L-shaped air duct, L-shaped air duct is surrounded in the outside of S-shaped air duct, the air outlet end of S-shaped air duct is communicated with the air inlet end of L-shaped air duct, and grating net is arranged at cover body air inlet and cover body air outlet;By extending air duct, it avoids that motor noise is directly spread, to reduce motor noise;Air inlet duct cooperates with grating net, guarantees the motor protection level of IP23, the inclined plate at cover body air outlet cooperates with grating net, guarantees the motor protection level of IP23;Louver is replaced by grating net, gas flow is more smooth, increases the air intake and air intake speed, and the heat dissipation effect of motor is better.

Description

Technical Field

[0001] This invention belongs to the field of high-speed and high-efficiency box-type motor technology, specifically relating to a low-noise top cover for an openable high-speed and high-efficiency box-type motor. Background Technology

[0002] Currently, the cooling method for high-speed, high-efficiency box-type motors in the domestic market is IC01, which is natural cooling. Natural cooling directly utilizes the air surrounding the motor to cool it. The traditional industry method for natural cooling is to install louvers on the side panel of the frame for heat dissipation, or to install louvers on a simple top cover for heat dissipation, in order to simultaneously meet the IC01 cooling requirement and the IP23 protection rating. For high-speed motors using this type of cooling method, such as 2p motors, the following drawbacks exist:

[0003] 1. There is electromagnetic noise inside the motor, as well as ventilation noise generated by the motor fan, stator and rotor ventilation slots and related rotating parts. This noise is directly transmitted to the outside of the motor through the louvers, resulting in a large motor operating noise on site and a poor user experience.

[0004] 2. The use of louvered windows for heat dissipation results in high wind resistance, hindering smooth airflow and affecting motor heat dissipation. Summary of the Invention

[0005] The purpose of this invention is to provide a low-noise top cover for an openable high-speed and high-efficiency box-type motor, so as to overcome the technical problems of high noise and poor heat dissipation of high-speed and high-efficiency box-type motors in the prior art.

[0006] To solve the above problems, the technical solution of the present invention is as follows: a low-noise top cover for an openable high-speed and high-efficiency box-type motor, comprising a cover body installed on the top of the motor base, an air inlet duct and an air outlet duct provided inside the cover body, the air inlet duct and the air outlet duct being separated by a partition fixed inside the cover body, the air flow directions of the air ducts on both sides of the partition being opposite; the air inlet duct includes an S-shaped air duct and an L-shaped air duct, the L-shaped air duct surrounding the outside of the S-shaped air duct, the air outlet end of the S-shaped air duct being connected to the air inlet end of the L-shaped air duct, and the air outlet duct surrounding the outside of the air inlet duct;

[0007] The bottom of the enclosure has an air inlet and an air outlet for the base, and the sides of the enclosure have an air inlet and an air outlet for the enclosure. Both the air inlet and the air outlet are equipped with grilles. The air inlet of the S-shaped air duct is connected to the air inlet of the enclosure, and the air outlet of the L-shaped air duct is connected to the air inlet of the base. The air inlet of the air outlet duct is connected to the air outlet of the base, and the air outlet of the air outlet duct is connected to the air outlet of the enclosure.

[0008] The partition includes an inclined plate that faces the air outlet of the cover. The lower end of the inclined plate is fixedly connected to the inner wall of the cover located below the air outlet of the cover. The upper end of the inclined plate extends upward in a direction away from the air outlet of the cover, making the air outlet duct inverted U-shape.

[0009] Optionally, two partitions are provided inside the enclosure, symmetrically distributed on the left and right sides of the enclosure. The two partitions divide the interior of the enclosure into a middle cavity and two lower cavities, with the two lower cavities symmetrically located on the left and right sides of the middle cavity. An air inlet duct is provided in the lower cavities, and an air outlet duct is provided in the middle cavity.

[0010] Optionally, a central baffle is fixedly installed in the central cavity, which divides the central cavity into two symmetrical air outlet ducts.

[0011] Optionally, the middle guide plate is Y-shaped, with the upper part of the middle guide plate fixedly connected to the top wall of the cover and the lower part of the middle guide plate fixedly connected to the bottom wall of the cover.

[0012] Optionally, a first guide plate and a second guide plate are provided in the lower cavity. One end of the first guide plate is fixedly connected to the inclined plate, and the other end of the first guide plate extends horizontally. The second guide plate includes a horizontal short plate, a vertical plate, and a horizontal long plate. One end of the horizontal short plate is fixedly connected to one end of the horizontal long plate through the vertical plate, and the other end of the horizontal long plate is fixedly connected to the side wall of the cover. The horizontal short plate is located above the first guide plate, and the horizontal long plate is located below the first guide plate. The other end of the first guide plate and the other end of the horizontal short plate are staggered to form an overlapping edge. The top wall of the first guide plate, the vertical plate, the horizontal short plate, the inclined plate, and the partition plate forms an S-shaped air duct, and the side wall of the vertical plate, the partition plate, and the bottom wall of the cover form an L-shaped air duct.

[0013] Optionally, an air inlet is provided on the side wall of the enclosure surrounded by the first guide plate, the horizontal long plate, and the vertical plate.

[0014] Optionally, both the baffle and the second deflector are made by bending a single piece of material.

[0015] Optionally, the angle between the inclined plate and the vertical plane where the air outlet of the cover is located is 30 degrees.

[0016] Optionally, the air inlets of the hood are distributed on a pair of parallel side panels of the hood, and the air outlets of the hood are distributed on another pair of parallel side panels of the hood.

[0017] Optionally, the air outlet of the base is located in the middle of the bottom wall of the enclosure, and the air inlet of the base is set to two, located on the left and right sides of the bottom wall of the enclosure respectively. The two air inlets of the base are connected to the air inlet ducts on the left and right sides of the enclosure.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The low-noise top cover of the present invention reduces motor noise by extending the length of the air inlet and outlet ducts; the S-shaped and L-shaped air inlet ducts form a curved structure with a long distance, thereby ensuring the protection level of the motor, and the inclined plate of the air outlet duct ensures the protection level of the motor; the grille mesh set at the air inlet and outlet of the cover reduces wind resistance and increases air volume and wind speed, thereby improving the heat dissipation effect of the motor; the hot and cold airflows on both sides of the partition adopt convection heat transfer and conduct heat through the cover, further improving the heat dissipation effect of the motor.

[0020] 2. The low-noise top cover of the present invention has a middle guide plate that diverts and guides the airflow in the air outlet duct, thereby increasing the air outlet speed and improving the heat dissipation effect of the motor.

[0021] 3. The low-noise top cover of the present invention has air inlet ducts on both sides of the air outlet duct in the middle of the cover body. Through convection, the heat dissipation effect is improved. The use of two air inlet ducts increases the air intake volume, thereby improving the heat dissipation effect of the motor.

[0022] 4. The low-noise top cover of the present invention divides the lower cavity into an S-shaped air duct and an L-shaped air duct through the first guide plate and the second guide plate. The structure is simple, with few parts, and the air inlet duct is extended. While ensuring that the protection level of the motor is not reduced, the motor noise is prevented from being directly transmitted to the external environment, thereby reducing the motor noise transmitted to the external environment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the interior of the cover in this embodiment;

[0024] Figure 2 This is a diagram showing the gas flow inside the enclosure in this embodiment.

[0025] Reference numerals: 1. Motor base; 2. Cover; 21. Air inlet of the base; 22. Air outlet of the base; 23. Air inlet of the cover; 24. Air outlet of the cover; 25. Grille; 26. Partition; 261. Inclined plate; 27. Intermediate guide plate; 3. Air inlet duct; 31. S-shaped duct; 32. L-shaped duct; 4. Air outlet duct; 5. First guide plate; 6. Second guide plate; 61. Horizontal short plate; 62. Vertical plate; 63. Horizontal long plate. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] Example

[0028] like Figure 1 and Figure 2As shown, this embodiment provides a low-noise top cover for an openable high-speed, high-efficiency box-type motor, including a cover 2 installed on the top of the motor base 1. An air inlet duct 3 and an air outlet duct 4 are provided inside the cover 2. The air inlet duct 3 and the air outlet duct 4 are separated by a partition 26 fixed inside the cover 2, with the airflow directions of the ducts on both sides of the partition 26 being opposite. The air inlet duct 3 includes an S-shaped duct 31 and an L-shaped duct 32. The L-shaped duct 32 surrounds the outside of the S-shaped duct 31, and the air outlet end of the S-shaped duct connects to the air inlet end of the L-shaped duct 32. The air outlet duct 4 surrounds the outside of the air inlet duct 3. A base air inlet 21 and a base air outlet 22 are provided at the bottom of the cover 2, and a... The enclosure has an air inlet 23 and an air outlet 24, both of which are equipped with grilles 25. The air inlet of the S-shaped air duct 31 is connected to the air inlet 23, and the air outlet of the L-shaped air duct 32 is connected to the air inlet 21 of the base. The air inlet of the air outlet duct 4 is connected to the air outlet 22 of the base, and the air outlet of the air outlet duct 4 is connected to the air outlet 24 of the enclosure. The partition 26 includes an inclined plate 261 that is directly opposite the air outlet 24 of the enclosure. The lower end of the inclined plate 261 is fixedly connected to the inner wall of the enclosure 2 located below the air outlet 24 of the enclosure. The upper end of the inclined plate 261 extends upward at an angle away from the air outlet 24 of the enclosure, making the air outlet duct 4 inverted U-shape.

[0029] Through the above configuration, the S-shaped air duct 31 and the L-shaped air duct 32 work together to extend the length of the inlet air duct 3, and the outlet air duct 4 has an inverted U-shaped structure, which also extends the length of the outlet air duct 4. By extending the length of the inlet air duct 3 and the outlet air duct 4, the direct transmission of motor noise is prevented, thereby reducing motor noise. The inlet air duct 3 works in conjunction with the grille 25 to ensure the IP23 motor protection rating. The inclined plate 261 set at the air outlet 24 of the cover works in conjunction with the grille 25 to ensure the IP23 motor protection rating. Replacing the louvers with the grille 25 makes the airflow smoother, increases the air intake volume and air intake speed, and improves the heat dissipation effect on the motor. The air flow on both sides of the partition 26 is opposite, which makes the cold airflow and hot airflow on both sides of the partition 26 convection, improving the heat dissipation effect of the motor.

[0030] In this embodiment of the low-noise top cover, two partitions 26 are provided inside the cover body 2, which are symmetrically distributed on the left and right sides of the cover body 2. The two partitions 26 divide the interior of the cover body 2 into a middle cavity and two lower cavities. The two lower cavities are symmetrically located on the left and right sides of the middle cavity. An air inlet duct 3 is provided in the lower cavity, and an air outlet duct 4 is provided in the middle cavity.

[0031] With the above setup, two air inlet ducts 3 are used, which increases the air intake volume and thus improves the heat dissipation effect of the motor. Both air inlet ducts 3 are located on the periphery of the air outlet duct 4. By adopting a convection heat transfer method, the heat dissipation effect of the motor is further improved.

[0032] In this embodiment of the low-noise top cover, a central guide plate 27 is fixedly installed in the central cavity, dividing the central cavity into two symmetrical air outlet ducts 4. Through this arrangement, the central guide plate 27 diverts the gas in the air outlet ducts 4, guiding the gas to the air outlets 24 on opposite sides of the cover 2 before discharge, resulting in smoother airflow. Furthermore, the central guide plate 27 increases the heat conduction area, improving the heat dissipation effect of the motor.

[0033] In this embodiment of the low-noise top cover, the middle guide plate 27 is Y-shaped. The upper part of the middle guide plate 27 is fixedly connected to the top wall of the cover 2, and the lower part of the middle guide plate 27 is fixedly connected to the bottom wall of the cover 2. With the above arrangement, the Y-shaped middle guide plate 27 reduces the impact on the top wall of the cover 2 when the gas passes through the corner in the air outlet duct 4, resulting in a better airflow guiding effect.

[0034] In this embodiment of the low-noise top cover, a first guide plate 5 and a second guide plate 6 are provided in the lower cavity. The left end of the first guide plate 5 is fixedly connected to the middle of the inclined plate 261, and the right end of the first guide plate 5 extends to the right in the horizontal direction. The second guide plate 6 includes a horizontal short plate 61, a vertical plate 62 and a horizontal long plate 63. The right end of the horizontal short plate 61 and the right end of the horizontal long plate 63 are fixedly connected through the vertical plate 62. The left end of the horizontal long plate 63 is fixedly connected to the left side wall of the cover 2. The horizontal short plate 61 is located above the first guide plate 5, and the horizontal long plate 63 is located below the first guide plate 5. The other end of the first guide plate 5 and the other end of the horizontal short plate 61 are staggered to form an overlapping edge. The top wall of the first guide plate 5, the vertical plate 62, the horizontal short plate 61, the inclined plate 261 and the partition plate 26 form an S-shaped air duct 31, and the side wall of the vertical plate 62, the partition plate 26 and the bottom wall of the cover 2 form an L-shaped air duct 32.

[0035] In the low-noise top cover of this embodiment, the left end of the first guide plate 5 can also be fixedly connected to other positions of the inclined plate 261, or the left end of the first guide plate 5 can be fixedly connected to the left side wall of the cover 2, as long as an S-shaped air duct 31 and an L-shaped air duct 32 are formed together.

[0036] With the above configuration, the layout of the S-shaped air duct 31 and L-shaped air duct 32 in the lower cavity can be achieved through the cooperation of the first guide plate 5 and the second guide plate 6. The structure is simple, with few parts, low manufacturing cost, and good space utilization.

[0037] In this embodiment of the low-noise top cover, an air inlet 23 is provided on the side wall of the cover 2, which is surrounded by the first guide plate 5, the horizontal long plate 63, and the vertical plate 62. This arrangement allows gas to flow in from one end of the S-shaped air duct 31, thereby extending the length of the S-shaped air duct 31 and further improving the motor protection effect.

[0038] In this embodiment of the low-noise top cover, both the partition 26 and the second guide plate 6 are made by bending a single piece of plate. The structure is simple, easy to manufacture, and low in cost.

[0039] In this embodiment of the low-noise top cover, the angle between the inclined plate 261 and the vertical plane containing the air outlet 24 of the cover is 30 degrees. The inclined plate 261 cooperates with the grille 25 at the air outlet 24 of the cover to ensure the motor protection level of IP23. Moreover, the use of the grille 25 greatly reduces wind resistance, makes the airflow smoother, increases the air volume and air speed, thereby improving the heat dissipation effect of the motor.

[0040] In this embodiment of the low-noise top cover, the air inlets 23 are distributed on a pair of parallel side plates of the cover 2, and the air outlets 24 are distributed on another pair of parallel side plates of the cover 2. This arrangement, with the air inlets and outlets located on different side plates of the cover 2, prevents high-temperature gas from entering the cover 2 and affecting the motor's heat dissipation.

[0041] In this embodiment of the low-noise top cover, the base air outlet 22 is located in the middle of the bottom wall of the cover 2, and the base air inlet 21 is set to two, located on the left and right sides of the bottom wall of the cover 2 respectively. The two base air inlets 21 are connected to the air inlet ducts 3 on the left and right sides inside the cover 2.

[0042] With the above configuration, the air intake ducts 3 of the two lower cavities respectively draw air through the two base air inlets 21, increasing the air intake volume and improving the heat dissipation effect. Preferably, the air intake duct 3 on the left side of the cover 2 is connected to the base air inlet 21 on the left side, and the air intake duct 3 on the right side of the cover 2 is connected to the base air inlet 21 on the right side, which simplifies the structure and reduces costs.

[0043] The motor in the low-noise top cover of this embodiment is a two-stage high-speed motor with a high rotation speed. Appropriately extending the path will not affect the motor's heat dissipation effect.

[0044] In this embodiment of the low-noise top cover, the air outlet 24 of the cover is located on both sides of the cover 2. The hot air blown out from the middle of the motor core will not flow directly out from the middle side plate of the cover 2, but will be guided by the middle guide plate 27 to the air outlet 24 of the left and right end plates of the cover 2 and then discharged. This extends the length of the air outlet duct 4, reduces motor noise, and improves the protection effect of the motor.

[0045] In this embodiment of the low-noise top cover, the inner walls of the cover body 2 that form the air inlet duct 3 and the air outlet duct 4 are covered with a sound-absorbing layer, thereby reducing the noise of the motor.

[0046] In the low-noise dome of this embodiment, the mesh diameter of the grid 25 is less than 12mm.

Claims

1. A low-noise top cover for an openable high-speed, high-efficiency box-type motor, characterized in that, Includes a cover (2) installed on top of the motor base (1), with an air inlet duct (3) and an air outlet duct (4) inside the cover (2). The air inlet duct (3) and the air outlet duct (4) are separated by a partition (26) fixed inside the cover (2), and the air flow directions of the ducts on both sides of the partition (26) are opposite. The air inlet duct (3) includes an S-shaped duct (31) and an L-shaped duct (32). The L-shaped duct (32) surrounds the outside of the S-shaped duct (31), and the air outlet end of the S-shaped duct is connected to the air inlet end of the L-shaped duct (32). The air outlet duct (4) surrounds the outside of the air inlet duct (3). The bottom of the cover (2) has an air inlet (21) and an air outlet (22) for the base. The side of the cover (2) has an air inlet (23) and an air outlet (24) for the cover. Both the air inlet (23) and the air outlet (24) are equipped with grilles (25). The air inlet end of the S-shaped air duct (31) is connected to the air inlet (23) of the cover, and the air outlet end of the L-shaped air duct (32) is connected to the air inlet (21) of the base. The air inlet end of the air outlet duct (4) is connected to the air outlet (22) of the base, and the air outlet end of the air outlet duct (4) is connected to the air outlet (24) of the cover. The partition (26) includes an inclined plate (261) that is directly opposite the air outlet (24) of the cover. The lower end of the inclined plate (261) is fixedly connected to the inner wall of the cover (2) located below the air outlet (24). The upper end of the inclined plate (261) extends upward in a direction away from the air outlet (24) of the cover, so that the air outlet duct (4) is inverted U-shaped.

2. The low-noise top cover of an openable high-speed, high-efficiency box-type motor according to claim 1, characterized in that, Two partitions (26) are provided inside the cover (2), which are symmetrically distributed on the left and right sides of the cover (2). The two partitions (26) divide the inside of the cover (2) into a middle cavity and two lower cavities. The two lower cavities are symmetrically located on the left and right sides of the middle cavity. An air inlet duct (3) is provided in the lower cavity, and an air outlet duct (4) is provided in the middle cavity.

3. The low-noise top cover of an openable high-speed, high-efficiency box-type motor according to claim 2, characterized in that, A middle guide plate (27) is fixedly installed in the middle cavity, and the middle guide plate (27) divides the middle cavity into two symmetrical air outlet ducts (4).

4. The low-noise top cover of an openable high-speed, high-efficiency box-type motor according to claim 3, characterized in that, The middle guide plate (27) is Y-shaped. The upper part of the middle guide plate (27) is fixedly connected to the top wall of the cover (2), and the lower part of the middle guide plate (27) is fixedly connected to the bottom wall of the cover (2).

5. A low-noise top cover for an openable high-speed, high-efficiency box-type motor according to any one of claims 1-4, characterized in that, A first guide plate (5) and a second guide plate (6) are provided in the lower cavity. One end of the first guide plate (5) is fixedly connected to the inclined plate (261), and the other end of the first guide plate (5) extends horizontally. The second guide plate (6) includes a horizontal short plate (61), a vertical plate (62), and a horizontal long plate (63). One end of the horizontal short plate (61) and one end of the horizontal long plate (63) are fixedly connected through the vertical plate (62), and the other end of the horizontal long plate (63) is fixedly connected to the side wall of the cover (2). The horizontal short plate (61) is located above the first guide plate (5), and the horizontal long plate (63) is located below the first guide plate (5). The other end of the first guide plate (5) is staggered with the other end of the horizontal short plate (61) to form an overlapping edge. The top walls of the first guide plate (5), the vertical plate (62), the horizontal short plate (61), the inclined plate (261), and the partition plate (26) form an S-shaped air duct (31). The side walls of the vertical plate (62), the partition plate (26), and the bottom wall of the cover (2) form an L-shaped air duct (32).

6. The low-noise top cover of an openable high-speed, high-efficiency box-type motor according to claim 5, characterized in that, An air inlet (23) is opened on the side wall of the cover (2) surrounded by the first guide plate (5), the horizontal long plate (63) and the vertical plate (62).

7. The low-noise top cover of an openable high-speed, high-efficiency box-type motor according to claim 5, characterized in that, Both the baffle (26) and the second guide plate (6) are made by bending a whole plate.

8. The low-noise top cover of an openable high-speed, high-efficiency box-type motor according to claim 1, characterized in that, The angle between the inclined plate (261) and the vertical plane containing the air outlet (24) of the cover is 30 degrees.

9. The low-noise top cover of an openable high-speed, high-efficiency box-type motor according to claim 2, characterized in that, The air inlets (23) of the cover are distributed on a pair of parallel side panels of the cover (2), and the air outlets (24) of the cover are distributed on another pair of parallel side panels of the cover (2).

10. The low-noise top cover of an openable high-speed, high-efficiency box-type motor according to claim 2, characterized in that, The base air outlet (22) is located in the middle of the bottom wall of the cover (2). There are two base air inlets (21), located on the left and right sides of the bottom wall of the cover (2). The two base air inlets (21) are connected to the air inlet channels (3) on the left and right sides inside the cover (2).

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