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CN-224228891-U - Magnetic suspension centrifugal air compressor capable of reducing wind mill loss

CN224228891UCN 224228891 UCN224228891 UCN 224228891UCN-224228891-U

Abstract

The application relates to a magnetic suspension centrifugal air compressor capable of reducing wind mill loss, which comprises a compressor shell, a main shaft, a high-speed motor, an impeller and a cavity exhaust pipe. The compressor shell is internally limited with a containing cavity, and two sides of the compressor shell are correspondingly provided with air inlet pipes. The rotatable spacing setting of main shaft is in the holding cavity and main shaft both ends correspond and pass the compressor casing and stretch into in the intake pipe. The high-speed motor is arranged in the accommodating cavity and sleeved on the main shaft, and the two impellers are respectively arranged at two ends of the main shaft. One end of the cavity exhaust pipe is communicated with the accommodating cavity, and the other end of the cavity exhaust pipe is communicated with the air inlet pipe. Through setting up the cavity blast pipe to with the help of impeller in operation in the negative pressure effect that intake pipe department produced, realize the continuous pump drainage to the interior air of holding cavity, thereby can reduce the existence of the interior residual air of holding cavity, reduce the friction between high-speed motor and the air, reduce the windmilling loss, and then reduce the temperature rise of high-speed motor, promote system overall operation efficiency.

Inventors

  • ZHANG HANG

Assignees

  • IHI寿力压缩技术（苏州）有限公司

Dates

Publication Date
20260512
Application Date
20250528

Claims (6)

  1. 1. Magnetic suspension centrifugal air compressor capable of reducing wind mill loss, which is characterized by comprising: A compressor shell, wherein a containing cavity is defined in the compressor shell, air inlet pipes are correspondingly arranged at two sides of the compressor shell, The main shaft is rotatably limited and arranged in the accommodating cavity, and two ends of the main shaft correspondingly penetrate through the compressor shell and extend into the air inlet pipe; the high-speed motor is arranged in the accommodating cavity and sleeved on the main shaft; The two impellers are respectively arranged at two ends of the main shaft; The cavity exhaust pipe, cavity exhaust pipe one end with the holding cavity intercommunication, cavity exhaust pipe other end with the intake pipe intercommunication.
  2. 2. The magnetic suspension centrifugal air compressor capable of reducing wind mill loss according to claim 1, wherein an electromagnetic valve is arranged on the cavity exhaust pipe.
  3. 3. The magnetically levitated centrifugal air compressor of claim 1, further comprising: And the electromagnetic bearing is arranged between the compressor shell and the main shaft.
  4. 4. A magnetic levitation centrifugal air compressor capable of reducing windmilling loss according to claim 3, wherein the electromagnetic bearing comprises: The two radial bearings are arranged between the compressor shell and the main shaft, and are respectively positioned at two sides of the accommodating cavity; and the thrust bearing is arranged between the compressor shell and the main shaft and is positioned between the accommodating cavity and the radial bearing.
  5. 5. The magnetic suspension centrifugal air compressor capable of reducing wind mill loss according to claim 1, wherein a buffer cavity is arranged at the other end of the cavity exhaust pipe, and the buffer cavity is communicated with the air inlet pipe and is used for reducing the flow rate of exhaust gas and reducing the interference of air flow to the impeller.
  6. 6. The magnetic suspension centrifugal air compressor capable of reducing wind mill loss according to claim 1, wherein a pressure sensor is arranged in the cavity exhaust pipe and used for detecting the air pressure in the accommodating cavity in real time.

Description

Magnetic suspension centrifugal air compressor capable of reducing wind mill loss Technical Field The utility model relates to the technical field of centrifugal magnetic suspension air compressors, in particular to a magnetic suspension centrifugal air compressor capable of reducing wind mill loss. Background The existing magnetic suspension centrifugal air compressor generally adopts a structural design that a high-speed motor is arranged in a shell, however, residual air inevitably exists in a cavity between the shell and the high-speed motor, and when the motor rotates at a high speed, friction between the motor and the air can cause wind mill loss, so that the temperature of the motor is increased, and the operation efficiency of the motor is affected. To solve the above problems, conventional approaches generally include optimizing a motor rotor structure to reduce a contact area, disposing a cooling device in a cabinet to reduce temperature rise, and evacuating a cavity to reduce residual air before installation. However, the schemes have certain limitations that the rotor structure is limited by the performance parameters of the motor, the difficulty is high, the cooling device can control the temperature, but cannot substantially reduce the wind mill loss and increase the system cost, and the vacuumizing scheme still has the risk of air leakage because the shell cannot be completely sealed, so that the effect is limited. Disclosure of utility model The utility model aims to provide a magnetic suspension centrifugal air compressor capable of reducing wind mill loss, which can realize continuous pumping and exhausting of air in a containing cavity by arranging a cavity exhaust pipe between the containing cavity where a high-speed motor is located and an air inlet pipe of a compressor and by means of negative pressure effect generated by an impeller at the air inlet pipe in operation, so that the existence of residual air in the containing cavity can be reduced, friction between the high-speed motor and the air is reduced, wind mill loss is reduced, further, temperature rise of the high-speed motor is reduced, and the overall operation efficiency of a system is improved. In order to achieve the above object, the present utility model provides a magnetic suspension centrifugal air compressor capable of reducing wind mill loss, comprising: A compressor shell, wherein a containing cavity is defined in the compressor shell, air inlet pipes are correspondingly arranged at two sides of the compressor shell, The main shaft is rotatably limited and arranged in the accommodating cavity, and two ends of the main shaft correspondingly penetrate through the compressor shell and extend into the air inlet pipe; the high-speed motor is arranged in the accommodating cavity and sleeved on the main shaft; The two impellers are respectively arranged at two ends of the main shaft; The cavity exhaust pipe, cavity exhaust pipe one end with the holding cavity intercommunication, cavity exhaust pipe other end with the intake pipe intercommunication. Optionally, an electromagnetic valve is arranged on the cavity exhaust pipe. Optionally, the magnetic suspension centrifugal air compressor capable of reducing wind mill loss further comprises: And the electromagnetic bearing is arranged between the compressor shell and the main shaft. Optionally, the electromagnetic bearing includes: The two radial bearings are arranged between the compressor shell and the main shaft, and are respectively positioned at two sides of the accommodating cavity; and the thrust bearing is arranged between the compressor shell and the main shaft and is positioned between the accommodating cavity and the radial bearing. Optionally, the other end of the cavity exhaust pipe is provided with a buffer cavity, and the buffer cavity is communicated with the air inlet pipe and is used for reducing the flow speed of exhaust and reducing the interference of air flow to the impeller. Optionally, a pressure sensor is arranged in the cavity exhaust pipe and used for detecting the air pressure in the accommodating cavity in real time. The utility model has the beneficial effects that the cavity exhaust pipe is arranged between the accommodating cavity where the high-speed motor is positioned and the air inlet pipe of the compressor, and the continuous pumping and exhausting of the air in the accommodating cavity are realized by means of the negative pressure effect generated by the impeller at the air inlet pipe during operation, so that the existence of residual air in the accommodating cavity can be reduced, the friction between the high-speed motor and the air is reduced, the wind abrasion loss is reduced, the temperature rise of the high-speed motor is further reduced, and the integral operation efficiency of the system is improved. The wind mill loss can be effectively controlled without additionally arranging a vacuumizing device or a complex cooling system, a