A method and system for suppressing resonance of a vehicle-mounted fan
A technology for fans and locomotives, applied in pump control, mechanical equipment, engine control, etc., can solve problems such as bearing failure, deterioration of fan bearing working state, burning loss, etc., and achieve the effect of eliminating resonance
Active Publication Date: 2020-11-10
CRRC DALIAN CO LTD
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Problems solved by technology
However, due to the frequent changes in the running speed of the locomotive, the fan cannot avoid matching the vibration frequency of the locomotive body during design and testing.
When the locomotive is running at different speeds, when the vibration frequency of the locomotive body is close to the vibration frequency of the running fan, resonance is likely to occur. After the resonance occurs, the working condition of the fan bearing will deteriorate, and long-term operation will cause bearing failure or even burning.
Method used
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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0039] The invention provides a method for suppressing the resonance of a vehicle-mounted fan, comprising:
[0040] According to the difference between the actual vibration value of the fan and the preset vibration value, it is judged whether the fan and the locomotive body resonate. If the actual vibration value of the fan is greater than the preset vibration value, it is determined that the fan and the locomotive body resonate. At this time, the fan can be adjusted. output frequency to eliminate the resonance between the fan and the locomotive body.
[0041] The preset vibration value z of the fan consists of two parts: (1) The vibration value f of the locomotive fan unit when it is running, that is, ...
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The invention discloses a method and system for suppressing the resonance of a vehicle-mounted fan, including judging whether the fan resonates with the locomotive body according to the difference between the actual vibration value of the fan and the preset vibration value; if the fan resonates with the locomotive body, adjusting The output frequency of the fan is to eliminate the resonance between the fan and the locomotive body. The present invention is based on establishing the matching relationship of parameters such as the speed of the locomotive, the rotational speed of the fan, the vibration frequency of the outer barrel of the fan, and the temperature of the cooled component, and judges the resonance trend of the fan according to the difference between the actual vibration value of the fan and the preset vibration value, and actively adjusts the output frequency of the fan. , such as periodically adjusting the output frequency of the fan to achieve the technical effect of eliminating the resonance between the fan and the locomotive body.
Description
technical field [0001] The invention relates to the technical field of railway locomotives, and more specifically, to a method and system for suppressing resonance of a vehicle-mounted fan. Background technique [0002] Fans need to be installed on the locomotive body to provide cooling air for traction motors, converters, transformers and other equipment, and the locomotive converters provide AC power. When the locomotive is running, the fans work to ventilate and cool related equipment. [0003] The fan installed on the locomotive shall be installed on the locomotive after passing the ground test. However, since the running speed of the locomotive changes frequently, the fan cannot avoid matching the vibration frequency of the locomotive body during design and test. When the locomotive is running at different speeds, when the vibration frequency of the locomotive body is close to the vibration frequency of the running fan, resonance is likely to occur. After the resonance...
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IPC IPC(8): F04D27/00
CPCF04D27/00F05D2270/334F05D2270/303
Inventor 王威杨守君隋锡征鲁渝玲刘子敬
Owner CRRC DALIAN CO LTD