Air compressor cooling structure and air compressor

Abstract

The invention provides a cooling structure and an air compressor, the cooling structure comprises a shell and a stator, the shell is provided with a first inlet, a second inlet, a third inlet, a first outlet and a second outlet, the shell is internally provided with a liquid cooling flow channel, the liquid cooling flow channel is located between the first inlet and the second inlet, and the stator is arranged in the shell. The first inlet and the first outlet are oppositely arranged, the second inlet and the second outlet are oppositely arranged, the third inlet is located in the middle of the shell, a plurality of through holes are formed in the stator in the radial direction of the stator, and the third inlet and the through holes are oppositely arranged. According to the air compressor, the technical problems that in the prior art, the cooling effect of the air compressor is poor, and the performance of the air compressor is affected can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of air compressors, and in particular relates to an air compressor cooling structure and an air compressor. Background Art

[0002] Air compressor cooling is crucial in industrial applications. First, air compressors generate a significant amount of heat during operation. If heat isn't effectively dissipated, the compressed gas temperature rises, reducing compression efficiency. Second, excessively high operating temperatures accelerate the wear and aging of mechanical components, shortening the compressor's service life. A good cooling system can maintain the equipment within a suitable operating temperature range, reducing mechanical failures caused by high temperatures and thus extending the equipment's service life. Finally, excessively high compressor temperatures can cause fire or explosion, especially in the presence of flammable or explosive materials. Effective cooling measures can significantly reduce this risk, ensuring the safety of equipment and personnel. In short, air compressor cooling is not only key to improving operating efficiency and extending equipment life, but also a vital measure for ensuring safe production. Therefore, when designing and maintaining air compressor systems, full attention should be paid to the design of the cooling structure.

[0003] Since the cooling effect of the air compressor in the prior art is poor, which affects the performance of the air compressor and other technical problems, the present invention studies and designs an air compressor cooling structure and an air compressor. Summary of the Invention

[0004] Therefore, the present invention provides an air compressor cooling structure and an air compressor, which can solve the technical problem in the prior art that the cooling effect of the air compressor is poor and affects the performance of the air compressor.

[0005] In order to solve the above problems, the present invention provides an air compressor cooling structure, including: a shell and a stator, the shell is provided with a first inlet, a second inlet, a third inlet, a first outlet and a second outlet, a liquid cooling channel is provided in the shell, the liquid cooling channel is located between the first inlet and the second inlet, the first inlet is arranged opposite to the first outlet, the second inlet is arranged opposite to the second outlet, the third inlet is located in the middle of the shell, and a plurality of through holes are provided on the stator along the radial direction of the stator, and the third inlet is arranged opposite to the through holes.

[0006] In some embodiments, the liquid cooling channels are arranged in a spiral shape along the axial direction of the shell, and the pitch of the liquid cooling channels located in the middle portion of the shell is greater than the pitch of the liquid cooling channels located on both side portions of the shell.

[0007] In some embodiments, along the circumference of the shell, there are multiple first inlets, third inlets and second inlets, the first inlets are arranged in a one-to-one correspondence with the second inlets, one third inlet is arranged in correspondence with multiple through holes, and the sum of the flow areas of the multiple through holes is half of the flow area of ​​one third inlet.

[0008] In some embodiments, taking the radial cross-section of the shell as the projection surface, the shell has a first side and a second side, the first inlet and the second inlet are located on the first side, the first outlet and the second outlet are located on the second side, the first inlet and the first outlet are arranged in a one-to-one correspondence, and the second inlet and the second outlet are arranged in a one-to-one correspondence.

[0009] In some embodiments, a winding is provided on the stator, the first outlet and the second inlet are arranged opposite to the winding at one end of the stator, and the second inlet and the second outlet are arranged opposite to the winding at the other end of the stator.

[0010] In some embodiments, the inner wall of the shell is provided with a first guide portion and a second guide portion, the second inlet and the first inlet are located between the first guide portion and the second guide portion, and the first guide portion and the second guide portion extend toward the winding so that the airflow flowing out of the second inlet and the first inlet flows toward the winding; with the axial cross-section of the shell as the projection surface, there is a second angle between the first guide portion and the first inlet, and between the second guide portion and the second inlet, and the second angle is 57° to 60°.

[0011] In some embodiments, the air compressor cooling structure also includes a rotor, which is provided with a plurality of grooves. The plurality of grooves are arranged at intervals along the circumference of the rotor, and along the axial direction of the rotor, the middle of the groove is opposite to the middle of the shell, and the end of the groove is opposite to the end of the stator.

[0012] In some embodiments, one end of the groove is a first inner wall, and the other end of the groove is a second inner wall. Along the circumference of the rotor, the groove has a first side wall and a second side wall. A sink is provided at the bottom of the groove. An angle is formed between the first inner wall, the second inner wall, the first side wall, and the second side wall and the tangent direction of the rotor. The value range of the angle is 30° to 60°, and the inclination directions of the first inner wall and the second inner wall are opposite.

[0013] The present invention also provides an air compressor, which includes the aforementioned air compressor cooling structure.

[0014] The air compressor cooling structure and the air compressor provided by the present invention have the following beneficial effects:

[0015] The first and second inlets, first and second outlets, achieve same-side air inflow and outflow within the housing, enabling better control of airflow distribution and evenly covering the entire ventilation area, avoiding localized hot spots. The liquid cooling channel further cools the central portion of the air-cooled section. The third inlet and the through-holes enable radial ventilation of the stator and rotor, ensuring even airflow throughout the ventilation area, avoiding localized hot spots, and achieving all-around cooling for all components within the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. Those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0017] Figure 1 It is a structural schematic diagram of the air compressor cooling structure of the present invention;

[0018] Figure 2 Schematic diagram of the flow path of the air flow in the air compressor cooling structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the radial cross-section structure of the shell in the air compressor cooling structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the radial cross-section structure of the rotor in the air compressor cooling structure of the present invention.

[0021] The accompanying drawings are:

[0022] 1. Shell; 2. Liquid-cooling channel; 3. First inlet; 4. First outlet; 5. Second outlet; 6. Winding; 7. First air guide; 8. Second air guide; 9. Second inlet; 10. Third inlet; 11. Through hole; 12. Groove. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0025] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0026] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0027] See also Figures 1-4 As shown, according to an embodiment of the present invention, an air compressor cooling structure is provided, including: a shell 1 and a stator, the shell 1 is provided with a first inlet 3, a second inlet 9, a third inlet 10, a first outlet 4 and a second outlet 5, a liquid cooling channel 2 is provided in the shell 1, the liquid cooling channel 2 is located between the first inlet 3 and the second inlet 9, the first inlet 3 and the first outlet 4 are arranged opposite to each other, the second inlet 9 and the second outlet 5 are arranged opposite to each other, the third inlet 10 is located in the middle of the shell 1, and a plurality of through holes 11 are provided on the stator along the radial direction of the stator, and the third inlet 10 is arranged opposite to the through holes 11.

[0028] In this technical solution, air enters and exits the housing 1 from the same side through the first inlet 3, the second inlet 9, the first outlet 4, and the second outlet 5. This allows for better control of airflow distribution, ensuring even coverage of the entire ventilation area and avoiding localized hot spots. The liquid-cooling channel 2 further cools the intermediate portion of the air-cooled portion. The third inlet 10 and the through-hole 11 allow for radial ventilation of the stator and rotor, ensuring even coverage of the entire ventilation area and avoiding localized hot spots, thereby achieving all-around cooling of all components within the housing.

[0029] The liquid-cooling channel 2 is located between the third inlet 11 and the second inlet 10 , and the first inlet 3 and the second inlet 9 do not affect the arrangement of the liquid-cooling channel 2 .

[0030] In some embodiments, the liquid cooling channel 2 is arranged in a spiral shape along the axial direction of the shell 1 , and the pitch of the liquid cooling channel 2 located in the middle part of the shell 1 is greater than the pitch of the liquid cooling channel 2 located on both sides of the shell 1 .

[0031] In this technical solution, the liquid cooling channel 2 is arranged in a spiral shape to ensure that the cooling water cools the cylinder evenly. The cooling water channel extends around the cylinder and is distributed in a spiral shape. The pitch of the liquid cooling channel 2 located on both sides of the shell 1 is preferably selected as 6mm, and the pitch of the liquid cooling channel 2 located in the middle part of the shell 1 is preferably selected as 50mm, so as to facilitate the arrangement of the third inlet 10 and the through hole 11 to achieve the effect of radial ventilation.

[0032] In some embodiments, the shell 1 has multiple first inlets 3, third inlets 10 and second inlets 9 in the circumference, the first inlets 3 and the second inlets 9 are arranged in a one-to-one correspondence, one third inlet 10 is arranged in correspondence with multiple through holes 11, and the sum of the flow areas of the multiple through holes 11 is half of the flow area of ​​one third inlet 10.

[0033] In this technical solution, the first inlet 3 is located in the middle of the shell 1, and 4-5 rectangular air inlets are distributed along the circumference of the shell 1. Multiple air inlets can better distribute the airflow, avoid local overheating, and reduce the resistance of the airflow entering the motor. Multiple air inlets can also provide a certain degree of redundancy. If one of the air inlets is blocked by dust or other debris, the other air inlets can still work normally, ensuring that the cooling effect of the air compressor is not greatly affected. Preferably, four through holes 11 correspond to one of the third inlets 10, and the sum of the flow areas of the four through holes 11 is half of the flow area of ​​one of the third inlets 10, avoiding excessive flow resistance and small ventilation area, which can not only meet the temperature requirements of the rotor and winding, but also reduce the circulation of cooling air between the stator and rotor, reducing wind friction loss.

[0034] In some embodiments, taking the radial cross-section of the shell 1 as the projection surface, the shell 1 has a first side and a second side, the first inlet 3 and the second inlet 9 are located on the first side, the first outlet 4 and the second outlet 5 are located on the second side, the first inlet 3 and the first outlet 4 are arranged in a one-to-one correspondence, and the second inlet 9 and the second outlet 5 are arranged in a one-to-one correspondence.

[0035] In this technical solution, the first outlet 4 and the second outlet 5 are located on the left and right sides of the housing 1, with four to five rectangular air outlets distributed on each side. These rectangular air outlets are arranged in a straight line along the circumference of the housing 1. Cooling air flows into the motor from the left through the air inlet and then flows directly out of the left outlet. Only a small amount of cooling air flows out of the right outlet along the stator-rotor air gap, ensuring uniform temperature distribution within the motor. Furthermore, the amount of air in the stator-rotor air gap is related to wind friction losses. The less cooling air flows through the air gap, the lower the wind friction losses on the rotor surface.

[0036] In some embodiments, a winding 6 is provided on the stator, the first outlet 4 and the second inlet 10 are arranged opposite to the winding 6 at one end of the stator, and the third inlet 11 and the second outlet 5 are arranged opposite to the winding 6 at the other end of the stator.

[0037] In this technical solution, the first outlet 4 and the second inlet 10 are arranged opposite the winding 6 at one end of the stator, while the third inlet 11 and the second outlet 5 are arranged opposite the winding 6 at the other end of the stator. That is, the first outlet 4 and the second inlet 10 provide air cooling to and from the winding 6 at one end of the stator, while the third inlet 11 and the second outlet 5 provide air cooling to and from the winding 6 at the other end of the stator. This achieves separate cooling of the windings at both ends, improving cooling efficiency. The inlet and outlet of the liquid cooling channel 2 can be located between the second outlet 5 and the first outlet 4.

[0038] In some embodiments, the inner wall of the housing 1 is provided with a first air guide portion 7 and a second air guide portion 8. The second inlet 9 and the first inlet 3 are located between the first air guide portion 7 and the second air guide portion 8. The first air guide portion 7 and the second air guide portion 8 extend toward the winding 6 so that the airflow from the second inlet 9 and the first inlet 3 flows toward the winding. With the axial cross-section of the housing 1 as the projection plane, a second angle is defined between the first air guide portion 7 and the first inlet 3, and between the second air guide portion 8 and the second inlet 9. The second angle is between 57° and 60°.

[0039] In this technical solution, refer to Figure 1As shown, the first air guide portion 7 is in the shape of an inclined plane, and the inclined plane structure is inclined toward the winding 6. The inclined plane is annular on the inner wall of the shell 1, so that the air flowing in from the second air inlet 10 flows to the winding 6, and the air flowing through the winding 6 is guided to the first air outlet 4. The second air guide portion 8 is arc-shaped, and the arc is inclined toward the winding 6. The arc is annular on the inner wall of the shell 1, so that the air flowing in from the second inlet 9 flows to the winding 6, and the air flowing through the winding 6 is guided to the second air outlet 5. The first air guide portion 7 and the second air guide portion 8 can guide the cooling air to the position of heat-generating components such as the stator winding and the stator core to ensure that the cooling air contacts the heat source, improve the heat exchange efficiency, and prevent the fluid from flowing directly from the air inlet to the air outlet. The angle between the first air guide portion 7 and the second inlet 10, the third inlet 11 and the second air guide portion 8 is in the range of 57° to 60°.

[0040] In some embodiments, with the radial cross section of the housing 1 as a projection plane, a first line is defined between the first inlet 3 and the center of the housing 1, a second line is defined between the first outlet and the center of the housing 1, and an angle is defined between the first line and the second line, wherein the angle ranges from 120° to 180°. The angle is 180°.

[0041] In this technical solution, in order to ensure that the cooling air enters and exits from the same side of the stator at the same time, the cooling air flows out of the motor from the same side from which it flows into the motor. The angle between the air inlet and the air outlet should not be too small to ensure a good cooling effect.

[0042] In some embodiments, the air compressor cooling structure also includes a rotor, on which a plurality of grooves 12 are provided. The plurality of grooves 12 are arranged at intervals along the circumference of the rotor, and along the axial direction of the rotor, the middle of the groove 12 is opposite to the middle of the casing 1, and the end of the groove 12 is opposite to the end of the stator.

[0043] In this technical solution, multiple grooves 12 are spaced and evenly spaced along the circumference of the rotor, reducing the generation of imbalance. The grooves 12 allow airflow from the third inlet 10 and the channel 11 to flow into the grooves 12, thereby cooling the rotor. Axially, the middle of the grooves 12 oppose the middle of the housing 1, and the ends of the grooves 12 oppose the ends of the stator. This allows airflow within the grooves 12, after heat exchange with the rotor, to flow toward the winding 6, thereby exchanging heat with the winding 6. After heat exchange, the airflow exits through the second air outlet 5 and the first air outlet 4.

[0044] In some embodiments, one end of the groove 12 is a first inner wall, and the other end of the groove is a second inner wall. Along the circumference of the rotor, the groove 12 has a first side wall and a second side wall. The bottom of the groove 12 is provided with a sink. There is an angle between the first inner wall, the second inner wall, the first side wall and the second side wall and the tangent direction of the rotor, and the value range of the angle is 30° to 60°, and the inclination directions of the first inner wall and the second inner wall are opposite.

[0045] In this technical solution, the angle ranges from 30° to 60°, preferably 45°, and the first inner wall and the second inner wall are inclined in opposite directions. That is, with the longitudinal cross-section of the rotor as the projection plane, the groove is in the shape of an inverted trapezoid, while the first side wall and the second side wall have the same inclination direction. This allows the side walls of the groove to be arranged at an angle, ensuring that when the rotor rotates, one side guides the airflow into the hollow groove of the rotor, while the other side prevents the airflow from entering the hollow groove of the rotor. With the cross-section of the rotor as the projection plane, the side walls of the groove 12 are perpendicular to the axis of the rotor. The sunken groove increases the heat exchange area of ​​the rotor and improves the heat exchange efficiency. Furthermore, the sunken groove cooperates with the groove, so that when the rotor rotates, the airflow is more easily flowed into the groove under the action of the pressure difference, thereby cooling the rotor.

[0046] The air compressor cooling structure of the present invention allows airflow to more evenly cover the entire ventilation area, avoiding local hot spots. Compared with axial ventilation, radial ventilation requires less air to flow through the stator and rotor air gap, which can reduce wind friction losses.

[0047] The air compressor cooling structure of the present invention utilizes radial ventilation to better control airflow distribution, ensuring even airflow across the entire ventilation area and avoiding localized hot spots. When using radial ventilation cooling in an air compressor, only a small portion of the airflow flows through the stator-rotor air gap to cool the rotor. Hollow slots in the rotor guide cooling air into the rotor, cooling it and preventing it from overheating.

[0048] The present invention also provides an air compressor, comprising the above-mentioned air compressor cooling structure.

[0049] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. An air compressor cooling structure, characterized in that: include: A shell (1) and a stator, wherein the shell (1) is provided with a first inlet (3), a second inlet (9), a third inlet (10), a first outlet (4) and a second outlet (5), a liquid cooling channel (2) is provided in the shell (1), the liquid cooling channel (2) is located between the first inlet (3) and the second inlet (9), the first inlet (3) and the first outlet (4) are arranged opposite to each other, the second inlet (9) and the second outlet (5) are arranged opposite to each other, the third inlet (10) is located in the middle of the shell (1), and a plurality of through holes (11) are provided on the stator along the radial direction of the stator, and the third inlet (10) and the through holes (11) are arranged opposite to each other.

2. The air compressor cooling structure according to claim 1, characterized in that: Along the axial direction of the shell (1), the liquid cooling channel (2) is arranged in a spiral shape, and the pitch of the liquid cooling channel (2) located in the middle part of the shell (1) is greater than the pitch of the liquid cooling channel (2) located on both sides of the shell (1).

3. The air compressor cooling structure according to claim 1, characterized in that: Along the circumference of the shell (1), there are a plurality of the first inlet (3), the third inlet (10) and the second inlet (9), the first inlet (3) and the second inlet (9) are arranged in a one-to-one correspondence, one third inlet (10) is arranged in a corresponding correspondence with a plurality of the through holes (11), and the sum of the flow areas of the plurality of through holes (11) is half the flow area of ​​one third inlet (10).

4. The air compressor cooling structure according to claim 3, characterized in that: Taking the radial cross section of the shell (1) as a projection surface, the shell (1) has a first side and a second side, the first inlet (3) and the second inlet (9) are located on the first side, the first outlet (4) and the second outlet (5) are located on the second side, the first inlet (3) and the first outlet (4) are arranged in a one-to-one correspondence, and the second inlet (9) and the second outlet (5) are arranged in a one-to-one correspondence.

5. The air compressor cooling structure according to claim 1, characterized in that: The stator is provided with a winding (6), the first outlet (4) and the second inlet (10) are arranged opposite to the winding (6) at one end of the stator, and the second inlet (9) and the second outlet (5) are arranged opposite to the winding (6) at the other end of the stator.

6. The air compressor cooling structure according to claim 5, characterized in that: The inner wall of the shell (1) is provided with a first air guide portion (7) and a second air guide portion (8); the second inlet (9) and the first inlet (3) are located between the first air guide portion (7) and the second air guide portion (8); the first air guide portion (7) and the second air guide portion (8) extend toward the winding (6) so that the airflow flowing out of the second inlet (9) and the first inlet (3) flows toward the winding; with the axial cross section of the shell (1) as the projection plane, there is a second angle between the first air guide portion (7) and the first inlet (3), and between the second air guide portion (8) and the second inlet (9); the second angle is 57° to 60°.

7. The air compressor cooling structure according to claim 1, characterized in that: The air compressor cooling structure also includes a rotor, on which a plurality of grooves (12) are provided. The plurality of grooves (12) are arranged at intervals along the circumference of the rotor, and along the axial direction of the rotor, the middle of the grooves (12) are opposite to the middle of the housing (1), and the ends of the grooves (12) are opposite to the ends of the stator.

8. The air compressor cooling structure according to claim 8, characterized in that: One end of the groove (12) is a first inner wall, and the other end of the groove is a second inner wall. Along the circumference of the rotor, the groove (12) has a first side wall and a second side wall. A sink is provided at the bottom of the groove (12). An angle is formed between the first inner wall, the second inner wall, the first side wall, the second side wall, and the tangent direction of the rotor. The angle has a value range of 30° to 60°, and the first inner wall and the second inner wall have opposite inclination directions.

9. An air compressor, characterized in that: The air compressor cooling structure comprises the air compressor cooling structure according to any one of claims 1 to 9.

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