Air compressor bearing cooling structure

Abstract

The utility model discloses a bearing cooling structure of an air compressor, which relates to the field of air compressors and comprises a cooling channel and a first cooling piece, a shell of the air compressor is made of aluminum profiles, the cooling channel is arranged on the shell and provided with an air inlet, two outlets, an air outlet and two inlets, and the first cooling piece is arranged on the air inlet. The two outlets are located in bearing cavities in the two sides of the air compressor correspondingly, the two inlets are located in bearing cavities in the two sides of the air compressor correspondingly, the air outlet is used for discharging high-temperature air out of the air compressor, and the air inlet is used for introducing air into the cooling channel. The first cooling piece is used for cooling the air introduced into the cooling channel and the air compressor stator; the shell is made of the aluminum profile, the cooling channel is directly formed in the profile, cooling water is directly utilized for cooling through the first cooling piece, gas cooling of the bearing system is achieved, the cooling channel of the bearing system is simplified, the size of the shell of the whole machine is reduced, and the manufacturing difficulty and the production cost are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of air compressors, in particular to a cooling structure for air compressor bearings. Background Technique

[0002] An electric air compressor is used to increase the gas density and improve the gas utilization rate. An electronic electromagnetic air compressor is generally driven by a high-speed motor. The stator coil of the high-speed motor is fixed on the machine shell, and its rotor magnet is fixed inside the rotating shaft. The magnet is driven by a high-frequency current to rotate in the magnetic field of the coil, thereby driving the rotating shaft and the pressure wheel on the rotating shaft to rotate to achieve the purpose of compressing air.

[0003] The rotor system adopts air bearings and needs to extract gas from the pipeline as a medium to support the bearing operation. Heat will be generated when the medium gas works, so it is necessary to cool the working medium at the same time, as Figure 1 shown. Since the outer shell is a casting shell in the prior art, the cooling channels of the air bearings are often designed complexly, and there are many holes drilled between the components, making the manufacturing difficult. Content of the Utility Model

[0004] The purpose of the utility model is to design a cooling structure for air compressor bearings to solve the above problems.

[0005] The utility model realizes the above purpose through the following technical solutions:

[0006] A cooling structure for air compressor bearings, comprising:

[0007] A cooling channel; the outer shell of the air compressor is made of aluminum profile, and the cooling channel is arranged on the outer shell. The cooling channel is provided with an air inlet, two outlets, an air outlet and two inlets. The two outlets are respectively located in the bearing cavities on both sides of the air compressor, and the two inlets are respectively located in the bearing cavities on both sides of the air compressor. The air outlet is used to discharge the high-temperature gas out of the air compressor, and the air inlet is used to introduce gas into the cooling channel;

[0008] A first cooling member; the first cooling member is used to cool the gas introduced into the cooling channel and the stator of the air compressor.

[0009] The beneficial effect of the utility model is that: the outer shell is made of aluminum profile, the cooling channel is directly formed on the profile, and the first cooling member directly uses cooling water for cooling, realizing the gas cooling of the bearing system, simplifying the cooling channel of the bearing system, reducing the size of the whole machine shell, and greatly reducing the manufacturing difficulty and production cost. Description of the Drawings

[0010] Figure 1 is the cooling structure of the prior art;

[0011] Figure 2It is a schematic structural diagram of a bearing cooling structure of an air compressor of the present utility model;

[0012] Figure 3 It is a schematic structural diagram of a housing in a bearing cooling structure of an air compressor of the present utility model;

[0013] Figure 4 It is a schematic cross-sectional structural diagram of a housing in a bearing cooling structure of an air compressor of the present utility model;

[0014] Figure 5 It is a schematic structural diagram of a cooling channel in a bearing cooling structure of an air compressor of the present utility model;

[0015] Figure 6 It is a schematic structural diagram of a water cooling channel in a bearing cooling structure of an air compressor of the present utility model;

[0016] Figure 7 It is a schematic diagram of the internal structure in a bearing cooling structure of an air compressor of the present utility model Figure 1 ;

[0017] Figure 8 It is a schematic diagram of the internal structure in a bearing cooling structure of an air compressor of the present utility model Figure 2 ;

[0018] Figure 9 It is a schematic diagram of the internal structure in a bearing cooling structure of an air compressor of the present utility model Figure 3 ;

[0019] Among them, the corresponding reference numerals are:

[0020] 1 - housing, 2 - first water cooling chamber, 3 - second water cooling chamber, 4 - air chamber, 5 - second communication channel, 6 - inner cavity, 7 - toothed plate, 8 - first communication channel, 9 - central axis of the air compressor rotor, 10 - air inlet, 11 - outlet, 12 - air outlet, 13 - inlet, 14 - bearing cavity, 15 - air outlet channel, 16 - gas channel, 17 - gas detection point, 18 - air inlet channel, 19 - through hole of the pressure housing, 20 - through hole of the bearing seat. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0022] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0023] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the product of the present invention is usually placed during use, or the orientation or positional relationships commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0025] In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0026] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings.

[0028] As Figures 2 - 9 shown, an air compressor bearing cooling structure includes:

[0029] A cooling channel; the housing 1 of the air compressor is made of aluminum profile, the cooling channel is disposed on the housing 1, the cooling channel is provided with an air inlet 10, two outlets 11, an air outlet 12 and two inlets 13. The two outlets 11 are respectively located in the bearing cavities 14 on both sides of the air compressor, the two inlets 13 are respectively located in the bearing cavities 14 on both sides of the air compressor, the air outlet 12 is used to discharge high-temperature gas out of the air compressor, and the air inlet 10 is used to introduce gas into the cooling channel;

[0030] The first cooling member; the first cooling member is used to cool the gas introduced into the cooling channel and the stator of the air compressor.

[0031] By directly forming the cooling channel for the air flow on the profile and adjacent to the first cooling member, and directly using cooling water for cooling, the gas cooling of the bearing system is realized, the cooling channel of the gas in the bearing system is simplified, the size of the outer shell 1 of the whole machine is reduced, and the manufacturing difficulty and production cost are greatly reduced.

[0032] The cooling channel includes an air outlet channel 15, m gas channels 16 and m - 1 first communication channels 8. The air outlet channel, the gas channels and the first communication channels are all opened on the outer shell. The first communication channel 8 is used for communicating between the first ends or the second ends of two adjacent gas channels 16. The inlet 10 of one of the two end gas channels 16 serves as the inlet 10 of the cooling channel, the two outlets 11 of the other gas channel 16 serve as the two outlets 11 of the cooling channel, the two inlets 13 of the air outlet channel 15 serve as the two inlets 13 of the cooling channel, and the air outlet 12 of the air outlet channel 15 serves as the air outlet 12 of the cooling channel. m is a positive integer greater than 1.

[0033] Gas detection points 17 are provided at both outlets 11 of the cooling channel. A monitoring module is provided at the gas detection point 17. The monitoring module is used to detect the gas temperature and pressure. The monitoring module includes a temperature sensor and a pressure sensor.

[0034] The air compressor bearing cooling structure further includes an air inlet channel 18. The air outlet 12 of the air inlet channel 18 is communicated with the inlet 10 of the cooling channel. The inlet 10 of the air inlet channel 18 is sequentially communicated with the through hole 20 of the bearing housing of the air compressor and the through hole 19 of the compressor housing in sequence.

[0035] The first cooling member includes a water cooling channel. The water cooling channel is adjacent to the cooling channel. The water cooling channel includes n first water cooling cavities 2 and n - 1 second communication channels 5. The first water cooling cavities 2 and the second communication channels 5 are all opened on the outer shell. The central axes of the multiple first water cooling cavities 2 are parallel to the central axis 9 of the air compressor rotor. The two ends of one second communication channel 5 are respectively communicated with the first ends or the second ends of two adjacent first water cooling cavities 2. The ends of the two first water cooling cavities 2 far from the second communication channel 5 respectively serve as the water inlet and the water outlet of the water cooling member. n is a positive integer greater than 1. That is, on the outer shell 1 of the aluminum profile, multiple non - communicating first water cavities 2 are opened. According to actual needs, the adjacent first water cavities 2 are cross - drilled, and the drilled channels serve as the second communication channels 5 to form a water cooling channel connected end to end; the space of the outer shell 1 is fully utilized, the cooling area of the first water cavity 2 is greatly increased, and the cooling effect of the outer shell 1 is improved.

[0036] The central axes of multiple first water cooling cavities 2 are parallel to the central axis 9 of the air compressor rotor. The water cooling channels are arranged on the housing 1, and the water cooling channels are located between the inner cavity 6 of the housing 1 and the cooling channels.

[0037] Multiple first water cooling cavities 2 are arranged in an annular array with the central axis 9 of the air compressor rotor as the center of the circle.

[0038] The first cooling member further includes multiple toothed plates 7. The multiple toothed plates 7 are arranged on the housing 1. The convex or concave toothed plates 7 can increase the surface area of the housing 1 and the heat dissipation area of the housing 1, and further improve the cooling effect of the housing 1.

[0039] The air compressor bearing cooling structure further includes a second cooling member. The air cavity 4 of the air compressor is arranged on the housing 1. The second cooling member is used for cooling and temperature reduction of the air flow in the air cavity 4. The second cooling member is arranged between the water cooling channel and the air cavity 4. The traditional externally connected air cavity is integrated into the profile and cooled together with water cooling, which improves the working efficiency of the product, simplifies the overall structure of the air compressor, and reduces the production cost; the air cavity 4 is formed by the profile, and the surface roughness is good, which reduces the frictional loss of the air flow and the efficiency loss of the air compressor; in the profile forming method, the size of the air cavity 4 is more stable, and the performance of the air compressor is more stable and reliable; due to the use of profile forming, the wall thickness of the housing 1 of the air compressor body can be greatly reduced, thereby reducing the weight of the housing 1.

[0040] The second cooling member includes two second water cooling cavities 3. The first ends of the two second water cooling cavities 3 are respectively used as the water inlet and outlet of the second cooling member, and the second ends of the two second water cooling cavities 3 are respectively communicated with the water inlet and outlet of the first water cooling cavity 2.

[0041] The working principle of a kind of air compressor bearing cooling structure of the utility model is as follows:

[0042] The housing 1 is made of customized aluminum profiles. The profile cross-section includes an inner cavity 6, and structures such as the rotor of the air compressor are installed inside the inner cavity 6. A number of first water-cooling cavities 2 are evenly arranged outside the inner cavity 6. An air outlet pipe, an air inlet passage 18, a number of gas passages 16 and a number of first communication passages 8 are arranged outside the first water-cooling cavities 2. One end of the air outlet passage 15 is connected to the left bearing cavity 14, and the other end is connected to the right bearing cavity 14. A number of gas passages 16 are connected through the first communication passages 8 processed at both ends of the housing 1 to form a through passage. One end of the air inlet passage 18 is sequentially connected to the through hole in the bearing seat and the through hole in the pressure housing. The two outlets 11 of the inlet cooling passage are connected to the left bearing and the right bearing cavity 14. Gas monitoring points are simultaneously arranged at the two outlets 11 of the cooling passage, and the gas temperature and pressure are detected through the monitoring module. The gas extracted from the pressure housing, which has a higher temperature, after passing through the air inlet passage 18, is cooled by the cooling water of the first cooling member in the cooling passage, and the cooled gas is distributed to the inner sides of the bearings at both ends through the two outlets 11 of the cooling passage. The gas outside the bearings is discharged to the outside of the housing through the air outlet 12 of the air outlet pipe for circulation, realizing the circulation of the entire cooling system.

[0043] A number of the first water-cooling cavities 2 are separated from each other by partition walls and are not connected. After the housing 1 of the profile is formed, on one end face of the profile housing 1, by machining, every other first water-cooling cavity 2, the partition wall between the adjacent two channels is drilled through to form a channel. At the other end of the profile housing 1, in the same way and in a staggered manner, the partition wall between the adjacent two first water-cooling cavities 2 is drilled through to form a complete water-cooling channel, but one partition wall is reserved as the partition wall of the inlet and outlet 11. An air cavity 4 is arranged outside the second water-cooling cavity 3.

[0044] By directly forming the cooling passage on the profile and directly using the cooling water through the first cooling member for cooling, the gas cooling of the bearing system is realized, simplifying the cooling passage of the bearing system, reducing the size of the housing 1 of the whole machine, and greatly reducing the manufacturing difficulty and production cost. Due to the use of profile forming, the wall thickness of the housing 1 can be greatly reduced, thereby reducing the weight of the housing 1.

[0045] The technical solution of the present utility model is not limited to the limitations of the above specific embodiments. Any technical deformation made according to the technical solution of the present utility model falls within the protection scope of the present utility model.

Claims

1. An air compressor bearing cooling structure, characterized in that: include: Cooling channels; The shell of the air compressor is made of aluminum profiles. The cooling channel is arranged on the shell. The cooling channel is provided with an air inlet, two outlets, an air outlet and two inlets. The two outlets are respectively located in the bearing cavities on both sides of the air compressor. The two inlets are respectively located in the bearing cavities on both sides of the air compressor. The air outlet is used to discharge the high-temperature gas out of the air compressor, and the air inlet is used to introduce the gas into the cooling channel. The first cooling element is used to cool the gas introduced into the cooling channel and the stator of the air compressor.

2. The air compressor bearing cooling structure according to claim 1, characterized in that: The cooling channel includes an air outlet channel, m gas channels and m-1 first connecting channels. The air outlet channel, the gas channel and the first connecting channel are all opened on the outer shell. The first connecting channel is used for connecting the first end or the second end of two adjacent gas channels. The air inlet of one of the gas channels at both ends serves as the air inlet of the cooling channel, the two outlets of the other gas channel serve as the two outlets of the cooling channel, the two inlets of the air outlet channel serve as the two inlets of the cooling channel, and the air outlet of the air outlet channel serves as the air outlet of the cooling channel. m is a positive integer greater than 1.

3. An air compressor bearing cooling structure according to claim 1 or 2, characterized in that: Gas detection points are provided at both outlets of the cooling channel. Monitoring modules are provided at the gas detection points. The monitoring modules are used to detect the gas temperature and pressure.

4. The air compressor bearing cooling structure according to claim 1, characterized in that: The air compressor bearing cooling structure also includes an air inlet channel, the air outlet of the air inlet channel is connected to the air inlet of the cooling channel, and the air inlet of the air inlet channel is connected to the through hole of the bearing seat of the air compressor and the through hole of the compressor shell of the air compressor in sequence.

5. The air compressor bearing cooling structure according to claim 1, characterized in that: The first cooling member includes a water cooling channel, which is adjacent to the cooling channel. The water cooling channel includes n first water cooling chambers and n-1 second connecting channels. The first water cooling chambers and the second connecting channels are both opened on the outer shell. The central axes of the multiple first water cooling chambers are parallel to the central axis of the air compressor rotor. The second connecting channel is used for connecting one end or the second end of two adjacent first water cooling chambers, wherein the ends of the two first water cooling chambers away from the second connecting channel serve as the water inlet and the water outlet of the water cooling member respectively, and n is a positive integer greater than 1.

6. The air compressor bearing cooling structure according to claim 5, characterized in that: The central axes of the plurality of first water-cooling chambers are parallel to the central axis of the air compressor rotor, and the water-cooling channel is located between the inner cavity of the shell and the cooling channel.

7. The air compressor bearing cooling structure according to claim 5, characterized in that: A plurality of first water-cooling chambers are arranged in a circular array with the central axis of the air compressor rotor as the center.

8. The air compressor bearing cooling structure according to claim 5, characterized in that: The first cooling member further includes a plurality of toothed plates, which are arranged on the shell.

9. The air compressor bearing cooling structure according to claim 5, characterized in that: The air compressor bearing cooling structure also includes a second cooling member. The air cavity of the air compressor is arranged on the shell. The second cooling member is used to cool the airflow in the air cavity. The second cooling member is arranged between the water cooling channel and the air cavity.

10. The air compressor bearing cooling structure according to claim 9, characterized in that: The second cooling element includes two second water cooling chambers, which are opened on the shell. The first ends of the two second water cooling chambers serve as the water inlet and outlet of the second cooling element respectively, and the second ends of the two second water cooling chambers are connected to the water inlet and outlet of the first water cooling chamber respectively.

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