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Centrifugal blower directly connected with motor

A centrifugal blower, direct connection technology, applied in the direction of machines/engines, electromechanical devices, electrical components, etc., can solve problems such as fan damage, weak instantaneous overload capacity, rotor vibration, etc.

Pending Publication Date: 2021-04-30
WUXI GL TUBRO COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The instantaneous overload capacity of both bearings is weak
When the centrifugal compressor surges, the rotor will vibrate violently, which will damage the fan itself.

Method used

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  • Centrifugal blower directly connected with motor

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Experimental program
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Effect test

Embodiment Construction

[0014] The present invention will be further described below in conjunction with specific drawings.

[0015] Such as figure 1 As shown, a motor direct-connected centrifugal blower includes a motor stator 1, a rotor 2, a head assembly and a motor casing 6; the head assembly includes an impeller 4 and a volute 5, and a diffuser is arranged on the volute 5 7. The outer end of the volute 5 is the fan inlet 8; the motor casing 6 is connected to the volute 5 through a flange; the motor stator 1 is connected to the motor casing 6 through interference fit, and the rotor is arranged inside the motor stator 1 2. The rotor 2 is supported by the high-speed ball bearing 3 and connected to the impeller 4; the air inlet end of the volute 5 is equipped with a guide vane 9 for adjusting the air intake of the impeller.

[0016] Preferably, the high-speed ball bearing 3 is a high-precision angular contact bearing, which provides axial load capacity to counteract the axial thrust of the impeller...

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PUM

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Abstract

The invention relates to a centrifugal blower directly connected with a motor. The centrifugal blower directly connected with the motor comprises a motor stator, a rotor, a machine head assembly and a motor shell, wherein the machine head assembly comprises an impeller and a volute; a diffuser is arranged on the volute; a fan inlet is formed in the outer end of the volute; the motor shell is connected with the volute through a flange; the motor stator is connected with the motor shell in an interference fit mode; the rotor is arranged in the motor stator, supported by a high-speed ball bearing and connected with the impeller; and a guide vane used for adjusting the air suction amount of the impeller is installed at the air inlet end of the volute. The guide vane comprises a vane body arranged in a surrounding mode, and the inclination angle of the vane body can be freely adjusted. The high-speed ball bearing adopts a ceramic ball. The high-speed ball bearing is an angular contact bearing. The centrifugal blower directly connected with the motor provided by the invention is compact in structure, and higher overall rigidity and ultrahigh bearing capacity are provided by adopting the ultrahigh-speed ball bearing.

Description

technical field [0001] The invention relates to a motor direct-connected centrifugal blower, which belongs to the technical field of blowers. Background technique [0002] Centrifugal blowers for aeration require high-speed rotating impellers, usually at 20,000 to 30,000 RPM. In the prior art, a high-speed motor is directly connected to the impeller for direct drive to achieve the desired rotational speed. The existing motor directly connected to the centrifugal blower usually adopts air suspension or magnetic suspension bearings, and the reliability of the bearings is low. The air suspension is supported by air film, the bearing has low rigidity and poor carrying capacity. Magnetic levitation relies on ultra-high-frequency position acquisition and control systems, which are highly dependent on electrical equipment and are susceptible to interference. The instantaneous overload capacity of both bearings is weak. When the centrifugal compressor surges, the rotor will vibr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/059F04D29/46F04D25/08H02K5/173H02K5/20H02K7/14
CPCF04D29/059F04D29/0566F04D29/462F04D25/08H02K5/173H02K5/20H02K7/14
Inventor 金炳庆戴勤生冯晨远
Owner WUXI GL TUBRO COMPRESSOR