Magnetic suspension centrifugal air compressor capable of reducing windmill loss

Abstract

The utility model relates to a magnetic suspension centrifugal air compressor capable of reducing windmill loss. The magnetic suspension centrifugal air compressor comprises a compressor shell, a main shaft, a high-speed motor, an impeller and a cavity exhaust pipe. A containing cavity is defined in the compressor shell, and air inlet pipes are correspondingly arranged on the two sides of the compressor shell. The main shaft is rotatably arranged in the containing cavity in a limited mode, and the two ends of the main shaft correspondingly penetrate through the compressor shell to stretch into the air inlet pipe. The high-speed motor is arranged in the containing cavity and arranged on the main shaft in a sleeving mode, and the two impellers are arranged at the two ends of the main shaft respectively. One end of the cavity exhaust pipe is communicated with the containing cavity, and the other end of the cavity exhaust pipe is communicated with the air inlet pipe. By arranging the cavity exhaust pipe and by means of the negative pressure effect generated at the air inlet pipe during operation of the impeller, continuous pumping and discharging of air in the containing cavity are achieved, so that residual air in the containing cavity can be reduced, friction between the high-speed motor and the air is reduced, air abrasion loss is reduced, temperature rise of the high-speed motor is reduced, and the service life of the high-speed motor is prolonged. The overall operation efficiency of the system is improved.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal magnetic levitation air compressor technology, specifically to a magnetic levitation centrifugal air compressor that can reduce wind wear loss. Background Technology

[0002] Existing magnetic levitation centrifugal air compressors generally employ a design that integrates a high-speed motor within the casing. However, residual air inevitably exists in the cavity between the casing and the high-speed motor. When the motor rotates at high speed, friction between it and the air leads to air wear losses, which in turn causes the motor temperature to rise, affecting its operating efficiency. To solve these problems, conventional solutions typically include optimizing the motor rotor structure to reduce the contact area, arranging a cooling device within the casing to reduce temperature rise, and evacuating the cavity before installation to reduce residual air.

[0003] However, these solutions have certain limitations: optimizing the rotor structure is limited by the motor's performance parameters, making it difficult; although the cooling device can control the temperature, it cannot substantially reduce windmilling losses and increases system costs; and the vacuuming solution has limited effectiveness because the casing cannot be completely sealed, leaving a risk of air leakage. Utility Model Content

[0004] The purpose of this invention is to provide a magnetic levitation centrifugal air compressor that can reduce wind wear loss. By setting a cavity exhaust pipe between the cavity containing the high-speed motor and the compressor's intake pipe, and by utilizing the negative pressure effect generated by the impeller at the intake pipe during operation, the air in the cavity can be continuously extracted, thereby reducing the presence of residual air in the cavity, reducing friction between the high-speed motor and the air, reducing wind wear loss, and thus reducing the temperature rise of the high-speed motor and improving the overall operating efficiency of the system.

[0005] To achieve the above objectives, this utility model provides a magnetic levitation centrifugal air compressor that can reduce windage losses, comprising:

[0006] A compressor housing, wherein an accommodating cavity is defined within the compressor housing, and intake pipes are correspondingly arranged on both sides of the compressor housing.

[0007] The main shaft is rotatably limited within the accommodating cavity, and both ends of the main shaft extend through the compressor housing and into the intake pipe.

[0008] A high-speed motor is disposed within the accommodating cavity and sleeved on the main shaft;

[0009] Two impellers are respectively disposed at both ends of the main shaft;

[0010] A cavity exhaust pipe, one end of which is connected to the accommodating cavity, and the other end of which is connected to the intake pipe.

[0011] Optionally, the cavity exhaust pipe is equipped with an electromagnetic valve.

[0012] Optionally, the magnetic levitation centrifugal air compressor that reduces wind wear losses further includes:

[0013] An electromagnetic bearing is disposed between the compressor housing and the main shaft.

[0014] Optionally, the electromagnetic bearing includes:

[0015] Two radial bearings are disposed between the compressor housing and the main shaft, and the two radial bearings are respectively located on both sides of the accommodating cavity;

[0016] A thrust bearing is disposed between the compressor housing and the main shaft, and located between the accommodating cavity and the radial bearing.

[0017] Optionally, a buffer chamber is provided at the other end of the cavity exhaust pipe. The buffer chamber is connected to the intake pipe and is used to slow down the exhaust flow rate and reduce the interference of airflow on the impeller.

[0018] Optionally, a pressure sensor is installed inside the cavity exhaust pipe to detect the air pressure inside the accommodating cavity in real time.

[0019] The beneficial effects of this invention are as follows: By setting a cavity exhaust pipe between the cavity containing the high-speed motor and the compressor's intake pipe, and utilizing the negative pressure effect generated by the impeller at the intake pipe during operation, continuous air extraction is achieved within the cavity. This reduces the presence of residual air within the cavity, lowers friction between the high-speed motor and the air, reduces windage losses, and consequently reduces the temperature rise of the high-speed motor, thereby improving the overall system operating efficiency. Effective control of windage losses can be achieved without the need for additional vacuuming devices or complex cooling systems. The design is simple, easy to implement, and highly adaptable.

[0020] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a schematic structural diagram of a magnetic levitation centrifugal air compressor that can reduce wind wear loss according to an embodiment of the present invention;

[0022] In the diagram: 1. Compressor housing; 11. Containing cavity; 2. Main shaft; 3. High-speed motor; 4. Impeller; 5. Cavity exhaust pipe; 6. Inlet pipe; 7. Solenoid valve; 8. Solenoid bearing; 81. Radial bearing; 82. Thrust bearing. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0026] Please see Figure 1 A preferred embodiment of this application shows a magnetic levitation centrifugal air compressor that reduces windage losses, comprising a compressor housing 1, a main shaft 2, a high-speed motor 3, impellers 4, and a cavity exhaust pipe 5. The compressor housing 1 defines a accommodating cavity 11, and intake pipes 6 are correspondingly arranged on both sides of the compressor housing 1. The main shaft 2 is rotatably limited within the accommodating cavity 11, and both ends of the main shaft 2 extend through the compressor housing 1 and into the intake pipes 6. The high-speed motor 3 is disposed within the accommodating cavity 11 and mounted on the main shaft 2, and two impellers 4 are respectively disposed at both ends of the main shaft 2. One end of the cavity exhaust pipe 5 communicates with the accommodating cavity 11, and the other end of the cavity exhaust pipe 5 communicates with the intake pipes 6.

[0027] According to the embodiment of this utility model, by setting a cavity exhaust pipe 5 between the accommodating cavity 11 where the high-speed motor 3 is located and the air intake pipe 6 of the compressor, and by utilizing the negative pressure effect generated at the air intake pipe 6 by the impeller 4 during operation, the air in the accommodating cavity 11 is continuously pumped out, thereby reducing the presence of residual air in the accommodating cavity 11, reducing friction between the high-speed motor 3 and the air, reducing wind wear loss, and thus reducing the temperature rise of the high-speed motor 3 and improving the overall operating efficiency of the system. Effective control of wind wear loss can be achieved without the need for additional vacuuming devices or complex cooling systems; the structure is simple, easy to implement, and highly adaptable.

[0028] The following detailed description uses specific examples:

[0029] Further, please see Figure 1 The cavity exhaust pipe 5 is equipped with a solenoid valve 7, which can be used to control the airflow and thus precisely adjust the opening and closing timing of the air extraction process of the cavity 11. The solenoid valve 7 can automatically close the cavity exhaust pipe 5 when the compressor is not running or when abnormal conditions occur, to prevent ineffective air extraction or external air backflow, and to ensure the safety and reliability of the system.

[0030] Please see Figure 1 The magnetic levitation centrifugal air compressor also includes an electromagnetic bearing 8, which is disposed between the compressor housing 1 and the main shaft 2. Specifically, the electromagnetic bearing 8 includes two radial bearings 81 and a thrust bearing 82. The two radial bearings 81 are disposed between the compressor housing 1 and the main shaft 2, and are located on both sides of the accommodating cavity 11. The thrust bearing 82 is disposed between the compressor housing 1 and the main shaft 2, and is located between the accommodating cavity 11 and the radial bearings 81. By using the electromagnetic bearing 8, the main shaft 2 can be stably supported in both the radial and axial directions, effectively suppressing any offset or displacement that may occur due to high-speed rotation of the main shaft 2, and improving the operational stability and reliability of the entire compressor system.

[0031] Furthermore, a buffer chamber is provided at the other end of the cavity exhaust pipe 5, which is connected to the intake pipe 6. This buffer chamber is used to slow down the exhaust flow rate and reduce the interference of airflow on the impeller 4. The buffer chamber allows the airflow discharged into the intake pipe 6 to be buffered and homogenized before entering the impeller 4, avoiding the direct impact of high-speed turbulence on the compressor impeller 4 and its adverse effects on aerodynamic performance. This effectively reduces airflow loss while further ensuring the compressor's intake efficiency and stable operation.

[0032] Furthermore, a pressure sensor is installed inside the cavity exhaust pipe 5 to detect the air pressure inside the cavity 11 in real time. By installing a pressure sensor electrically connected to the controller and monitoring the air pressure data inside the cavity 11 in real time, the opening and closing timing of the solenoid valve 7 can be further adjusted and optimized to achieve more precise management of the cavity exhaust pipe 5. At the same time, if the air pressure in the cavity 11 rises abnormally, the compressor system can also issue an early warning, which helps to improve the safety of system operation and maintenance efficiency.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A magnetic levitation centrifugal air compressor that reduces wind wear losses, characterized in that, include: A compressor housing, wherein an accommodating cavity is defined within the compressor housing, and intake pipes are correspondingly arranged on both sides of the compressor housing. The main shaft is rotatably limited within the accommodating cavity, and both ends of the main shaft extend through the compressor housing and into the intake pipe. A high-speed motor is disposed within the accommodating cavity and sleeved on the main shaft; Two impellers are respectively disposed at both ends of the main shaft; A cavity exhaust pipe, one end of which is connected to the accommodating cavity, and the other end of which is connected to the intake pipe.

2. The magnetic levitation centrifugal air compressor with reduced wind wear loss according to claim 1, characterized in that, The cavity exhaust pipe is equipped with an electromagnetic valve.

3. The magnetic levitation centrifugal air compressor with reduced wind wear loss according to claim 1, characterized in that, Also includes: An electromagnetic bearing is disposed between the compressor housing and the main shaft.

4. The magnetic levitation centrifugal air compressor with reduced wind wear loss according to claim 3, characterized in that, The electromagnetic bearing includes: Two radial bearings are disposed between the compressor housing and the main shaft, and the two radial bearings are respectively located on both sides of the accommodating cavity; A thrust bearing is disposed between the compressor housing and the main shaft, and located between the accommodating cavity and the radial bearing.

5. The magnetic levitation centrifugal air compressor with reduced wind wear loss according to claim 1, characterized in that, A buffer chamber is provided at the other end of the cavity exhaust pipe. The buffer chamber is connected to the intake pipe and is used to slow down the exhaust flow rate and reduce the interference of airflow on the impeller.

6. The magnetic levitation centrifugal air compressor with reduced wind wear loss according to claim 1, characterized in that, A pressure sensor is installed inside the cavity exhaust pipe to detect the air pressure inside the cavity in real time.

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