Cantilever type motor rotor for direct connection centrifugal compressor and direct connection centrifugal compressor

A technology for centrifugal compressors and motor rotors, used in machines/engines, mechanical equipment, non-variable-capacity pumps, etc., can solve the problems of limited improvement in vibration performance, huge box body, aggravated compressor vibration, etc., and achieve the shape structure. The effect of size and weight reduction, overall compactness, optimized vibration performance

A technology for centrifugal compressors and motor rotors, used in machines/engines, mechanical equipment, non-variable-capacity pumps, etc., can solve the problems of limited improvement in vibration performance, huge box body, aggravated compressor vibration, etc., and achieve the shape structure. The effect of size and weight reduction, overall compactness, optimized vibration performance

CN103362833AActive Publication Date: 2013-10-23GREE ELECTRIC APPLIANCES INC +1
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  • Cantilever type motor rotor for direct connection centrifugal compressor and direct connection centrifugal compressor
  • Cantilever type motor rotor for direct connection centrifugal compressor and direct connection centrifugal compressor
  • Cantilever type motor rotor for direct connection centrifugal compressor and direct connection centrifugal compressor

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Embodiment Construction

[0028] Embodiments of the present invention are described in detail below in conjunction with accompanying drawings:

[0029] figure 1 Shown is a schematic structural diagram of a two-stage centrifugal compressor. The centrifugal compressor is mainly composed of a casing 3, a casing 1, a first impeller 17, a second impeller 18, a motor 9 and a positioning device, wherein the casing 3 is a casting structure , used to fix most parts of the compressor. The box body 3 is integrally cast with the gas collector (volute), and the box body 3 has a built-in oil channel and an air channel. The box body 3 has a compact structure and is easy to process. The casing 1 used to fix the energy adjustment mechanism 2 and guide the airflow direction is connected to the box body 3, and the casing 1 and the box body 3 form a closed chamber with an air suction port and an exhaust port.

[0030] A first impeller 17 and a second impeller 18 are arranged in the closed chamber, the first impeller 17...

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Abstract

The invention discloses a cantilever type motor rotor for a direct connection centrifugal compressor. An impeller mounting part, a front bearing mounting part, a rotor iron core mounting part and a rear bearing mounting part are formed on the rotor sequentially in an axial direction, wherein a rotor iron core is mounted on the rotor iron core mounting part; the external diameter of the rotor iron core is D, and the length of the rotor iron core is L3; and a range of a ratio D / L3 of the external diameter of the rotor iron core to the axial length of the rotor iron core is 0.25-0.35. The invention further discloses the direct connection centrifugal compressor provided with the motor rotor structure. According to the centrifugal compressor, a motor is adopted to drive an impeller to rotate directly; a speed-increasing gearbox is removed; the centrifugal compressor has the advantages of high rated efficiency, small size, light weight and high energy efficiency; a rotating shaft structure is optimized; and the compressor can keep lower vibration at a high rotating speed.

Description

technical field [0001] The invention relates to a compressor used in the field of air conditioning, in particular to a high-speed (6000 rpm or more) centrifugal compressor with a direct-coupled shaft and a motor rotor thereof. Background technique [0002] Existing centrifugal compressors in the field of air-conditioning usually use fixed-frequency AC motors or variable-frequency AC motors. The speed is increased to the design speed through the speed-increasing gear, and the impeller is driven to rotate to do work on the incoming gas, thereby increasing the gas pressure. This conventional compressor structure has the following deficiencies: (1) Due to the intermediate gear speed increase box, the mechanical loss of the compressor is increased, thereby increasing the power consumption of the compressor and affecting the performance of the unit; (2) the existence of the gear box The shape and structure of the compressor are greatly increased, making the box appear bulky and he...

Claims

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Application Information

Patent Timeline
23 Oct 2013
Publication
CN103362833A
IPC
F04D25/06; F04D29/056; F04D29/28
Inventors
刘华; 张治平