Cooling system of magnetic suspension high-pressure air compressor

Abstract

The utility model belongs to the technical field of magnetic suspension high-pressure air compressor equipment, and discloses a magnetic suspension high-pressure air compressor cooling system which comprises an air compressor motor, a motor inner cavity is formed in the air compressor motor, a first volute is arranged on one side face of the air compressor motor, and a second volute is arranged on the side face, opposite to the first volute, of the air compressor motor. A heat exchanger is arranged between the air outlet end of the first volute and the air inlet end of the second volute through a pipeline and fixedly connected with an air compressor motor through a cooling air inlet pipe, and the first volute comprises a first impeller rotationally arranged in the first volute and a second impeller rotationally arranged in the second volute. The wheel backs of the first impeller and the second impeller are close to the inner cavity of the motor, and a circulating assembly is further arranged at the wheel back of the second impeller; the air compressor motor is simple in structure, the cooling efficiency of the air compressor is improved, and the sealing performance of the air compressor motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic levitation high-pressure air compressor equipment, in particular to a magnetic levitation high-pressure air compressor cooling system. Background Art

[0002] The magnetic levitation air compressor adopts magnetic levitation technology, which uses the magnetic field to support and suspend the rotor without contact, so that the rotor can rotate freely in the magnetic field, so that air is sucked into the compressor, passes through the compression and exhaust valves, and finally discharges high-pressure gas. The magnetic levitation air compressor motor is a high-speed motor with high power density. Motor cooling is one of the key issues, and the commonly used oil-cooling and water-cooling methods are relatively complex in structure and inconvenient to use.

[0003] The patent application number is CN202111090308.6, which discloses a main motor air-cooling constant temperature system for a magnetic levitation air compressor, including an air compressor main motor, a main motor air-cooling inlet, a main motor air-cooling outlet and a cooler outlet pipe are provided on the air compressor main motor, and a compressed air outlet pipe is provided on the cooler outlet pipe. The other end of the compressed air outlet pipe is connected to the main motor air-cooling inlet through a throttling and voltage stabilizing component; the throttling and voltage stabilizing component includes a one-way valve and an air storage tank arranged in sequence along the air flow direction, and part of the compressed air coming out of the compressed air main pipe flows from the one-way valve into the air storage tank through the compressed air outlet pipe, and then enters the air compressor main motor through the main motor air-cooling inlet for cooling, and a temperature sensor for detecting the temperature of the air compressor main motor is provided on the main motor air-cooling outlet.

[0004] The cooling system of the above patent still has certain shortcomings: due to the suspension of the main shaft, there must be a gap between the rotating part and the stationary part. It is difficult to ensure sealing under the high pressure of the high-pressure air compressor, resulting in large leakage, affecting the specific power and energy efficiency of the air compressor. The above cooling system does not solve this problem, and the structure is complex. The gas used for cooling cannot be reused after discharge, which reduces the working efficiency of the air compressor. Utility Model Content

[0005] The main technical problem to be solved by the utility model is to provide a magnetic levitation high-pressure air compressor cooling system, which can improve the cooling efficiency of the air compressor and achieve efficient sealing of the air compressor.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A magnetic levitation high-pressure air compressor cooling system includes an air compressor motor, a motor inner cavity is provided in the air compressor motor, a first volute is provided on one side of the air compressor motor, a second volute is provided on the side of the air compressor motor opposite to the first volute, a heat exchanger is provided between the air outlet end of the first volute and the air inlet end of the second volute through a pipeline, the heat exchanger is fixedly connected to the air compressor motor through a cooling air inlet pipe, the first volute includes a first impeller rotatably provided in the first volute, the first volute includes a second impeller rotatably provided in the second volute, the wheel backs of the first impeller and the second impeller are both close to the motor inner cavity, and a circulation component is also provided on the wheel back of the second impeller.

[0008] The following is a further optimization of the above technical solution by the present invention:

[0009] The air outlet end of the first volute is connected to an air inlet pipe, the other end of the air inlet pipe is connected to the air inlet end of the heat exchanger, the air inlet end of the second volute is connected to an air outlet pipe, the other end of the air outlet pipe is connected to the output end of the heat exchanger.

[0010] Further optimization: the end of the cooling air intake pipe connected to the air compressor motor passes through the air compressor motor and extends into the inner cavity of the motor.

[0011] Further optimization: A cooling exhaust cavity is provided on the air compressor motor at the back of the second impeller, and one end of the motor inner cavity close to the cooling exhaust cavity is connected to the cooling exhaust cavity through a through hole.

[0012] Further optimization: the circulation component includes cooling circulation blades located in the inner cavity of the motor, the cooling circulation blades are arranged in the cooling exhaust cavity, and the projected area of ​​the cooling circulation blades is smaller than the projected area of ​​the blades of the second impeller.

[0013] Further optimization: A through hole is opened on the top surface of the air compressor motor near the position above the cooling circulation blades, the inner end of the through hole is connected to the cooling exhaust cavity, the outer end of the through hole is connected to a cooling outlet pipe, and the other end of the cooling outlet pipe is connected to the air inlet end of the heat exchanger.

[0014] Further optimization: the circulation component includes cooling circulation blades located in the second volute, and the projected area of ​​the cooling circulation blades is smaller than the projected area of ​​the blades of the second impeller; the cooling circulation blades are arranged in the cooling exhaust chamber, and the side of the cooling exhaust chamber close to the second volute is connected to the compression flow channel in the second volute.

[0015] The utility model adopts the above technical solution, which is ingenious in conception and reasonable in structure. It can effectively cool the air compressor motor without the need for an additional power source, and can recycle the cold air used for cooling without reducing the working efficiency of the air compressor. Moreover, through the design of the impeller, the air compressor motor is sealed by the pressure difference without adding other substances, thereby improving the sealing efficiency.

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0018] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0019] Figure 3 This is a schematic structural diagram of Example 2 of the present utility model;

[0020] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0021] In the figure: 1-air compressor motor; 2-motor inner cavity; 3-first volute; 4-first impeller; 5-inlet pipe; 6-heat exchanger; 7-outlet pipe; 8-cooling inlet pipe; 9-second volute; 10-second impeller; 11-cooling circulation blades; 12-cooling outlet pipe; 13-cooling exhaust chamber. DETAILED DESCRIPTION

[0022] like Figure 1-2 As shown: A magnetic levitation high-pressure air compressor cooling system includes an air compressor motor 1, a motor inner cavity 2 is provided in the air compressor motor 1, a first volute 3 is provided on one side of the air compressor motor 1, and a second volute 9 is provided on the side opposite to the first volute 3 of the air compressor motor 1. A heat exchanger 6 is provided between the air outlet end of the first volute 3 and the air inlet end of the second volute 9 through a pipeline. The heat exchanger 6 is fixedly connected to the air compressor motor 1 through a cooling air inlet pipe 8. The first volute 3 includes a first impeller 4 rotatably arranged in the first volute 3, and the first volute 3 includes a second impeller 10 rotatably arranged in the second volute 9. The backs of the first impeller 4 and the second impeller 10 are both close to the motor inner cavity 2, and a circulation component is also provided on the back of the second impeller 10.

[0023] The air outlet end of the first volute 3 is connected to the air inlet pipe 5, the other end of the air inlet pipe 5 is connected to the air inlet end of the heat exchanger 6, the air inlet end of the second volute 9 is connected to the air outlet pipe 7, the other end of the air outlet pipe 7 is connected to the output end of the heat exchanger 6.

[0024] One end of the cooling air intake pipe 8 connected to the air compressor motor 1 passes through the air compressor motor 1 and extends into the motor inner cavity 2 .

[0025] A cooling exhaust cavity 13 is provided on the air compressor motor 1 at the wheel back of the second impeller 10 , and one end of the motor inner cavity 2 close to the cooling exhaust cavity 13 is communicated with the cooling exhaust cavity 13 through a through hole.

[0026] The circulation component includes a cooling circulation blade 11 located in the motor inner cavity 2 . The cooling circulation blade 11 is arranged in the cooling exhaust cavity 13 . The projected area of ​​the cooling circulation blade 11 is smaller than the projected area of ​​the blades of the second impeller 10 .

[0027] A through hole is opened on the top surface of the air compressor motor 1 near the position above the cooling circulation blade 11. The inner end of the through hole is connected to the cooling exhaust chamber 13, and the outer end of the through hole is connected to the cooling outlet pipe 12. The other end of the cooling outlet pipe 12 is connected to the air inlet end of the heat exchanger 6.

[0028] During use, the gas to be compressed enters the first volute 3 and is compressed for the first time through the first impeller 4 to obtain the primary compressed gas. At this time, the gas temperature increases due to compression, and the primary compressed gas enters the heat exchanger 6 through the air inlet pipe 5 for heat exchange and cooling. Most of the cooled primary compressed gas enters the second volute 9 through the air outlet pipe 7 for the second gas compression. A small part of the cooled primary compressed gas enters the motor cavity 2 through the cooling air inlet pipe 8 to cool the motor. The suction effect generated by the cooling circulation blades 11 promotes the cooling circulation of cold air to the motor cavity 2, and draws and drives the circulated cold air into the cooling exhaust cavity 13, and then returns to the heat exchanger 6 through the cooling air outlet pipe 12 for heat exchange and cooling.

[0029] During operation, the gas pressure at the back of the first impeller 4 is equal to or slightly lower than the pressure in the motor cavity 2, and the gas pressure at the back of the second impeller 10 is equal to or slightly lower than the pressure in the motor cavity 2. The air compressor motor 1 is sealed by the pressure difference, and the leaked gas enters the heat exchanger 6 through the cooling outlet pipe 12 under the action of the cooling circulation blades 11.

[0030] Example 2: Figure 3-4 As shown, in this embodiment 2, the magnetic levitation high-pressure air compressor cooling system can also adopt Figure 3-4 The structure is different from that of Example 1 in that the circulation component includes a cooling circulation blade 11 located in the second volute 9, and the projected area of ​​the cooling circulation blade 11 is smaller than the projected area of ​​the blade of the second impeller 10; the cooling circulation blade 11 is arranged in a cooling exhaust chamber 13, and the cooling exhaust chamber 13 is connected to the compression flow channel in the second volute 9 on the side close to the second volute 9.

[0031] During use, the cold air released by the cooling intake pipe 8 cools the air compressor motor 1, enters the cooling exhaust chamber 13 under the action of the cooling circulation blades 11, and then enters the compression flow channel in the second volute 9 for circulation.

[0032] For ordinary technicians in this field, based on the teachings of this utility model, without departing from the principles and spirit of this utility model, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of this utility model.

Claims

1. A magnetic levitation high-pressure air compressor cooling system, characterized by: The invention comprises an air compressor motor (1), wherein a motor inner cavity (2) is provided in the air compressor motor (1), a first volute (3) is provided on one side of the air compressor motor (1), a second volute (9) is provided on the side of the air compressor motor (1) opposite to the first volute (3), a heat exchanger (6) is provided between the air outlet end of the first volute (3) and the air inlet end of the second volute (9) through a pipeline, the heat exchanger (6) is fixedly connected to the air compressor motor (1) through a cooling air inlet pipe (8), the first volute (3) comprises a first impeller (4) rotatably provided in the first volute (3), the first volute (3) comprises a second impeller (10) rotatably provided in the second volute (9), the wheel backs of the first impeller (4) and the second impeller (10) are both close to the motor inner cavity (2), and a circulation component is further provided on the wheel back of the second impeller (10).

2. The magnetic levitation high-pressure air compressor cooling system according to claim 1, characterized in that: The air outlet end of the first volute (3) is connected to an air inlet pipe (5), the other end of the air inlet pipe (5) is connected to the air inlet end of the heat exchanger (6), the air inlet end of the second volute (9) is connected to an air outlet pipe (7), the other end of the air outlet pipe (7) is connected to the output end of the heat exchanger (6).

3. The magnetic levitation high-pressure air compressor cooling system according to claim 2, characterized in that: One end of the cooling air inlet pipe (8) connected to the air compressor motor (1) passes through the air compressor motor (1) and extends into the motor inner cavity (2).

4. The magnetic levitation high-pressure air compressor cooling system according to claim 3, characterized in that: A cooling exhaust cavity (13) is provided on the air compressor motor (1) at the wheel back of the second impeller (10), and one end of the motor inner cavity (2) close to the cooling exhaust cavity (13) is connected to the cooling exhaust cavity (13) through a through hole.

5. The magnetic levitation high-pressure air compressor cooling system according to claim 4, characterized in that: The circulation component comprises a cooling circulation blade (11) located in the motor inner cavity (2), the cooling circulation blade (11) being arranged in the cooling exhaust cavity (13), and the projected area of ​​the cooling circulation blade (11) being smaller than the projected area of ​​the blades of the second impeller (10).

6. The magnetic levitation high-pressure air compressor cooling system according to claim 5, characterized in that: A through hole is provided on the top surface of the air compressor motor (1) near a position above the cooling circulation blade (11); the inner end of the through hole is connected to the cooling exhaust cavity (13); the outer end of the through hole is connected to a cooling outlet pipe (12); the other end of the cooling outlet pipe (12) is connected to the air inlet end of the heat exchanger (6).

7. The magnetic levitation high-pressure air compressor cooling system according to claim 4, characterized in that: The circulation component includes a cooling circulation blade (11) located in the second volute (9), and the projected area of ​​the cooling circulation blade (11) is smaller than the projected area of ​​the blade of the second impeller (10); the cooling circulation blade (11) is arranged in a cooling exhaust cavity (13), and the side of the cooling exhaust cavity (13) close to the second volute (9) is connected to the compression flow channel in the second volute (9).

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