CN103868649A - On-line dynamic balancing correction method for rotors of double-rotor axial flow fan - Google Patents
On-line dynamic balancing correction method for rotors of double-rotor axial flow fan Download PDFInfo
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- CN103868649A CN103868649A CN201210549873.9A CN201210549873A CN103868649A CN 103868649 A CN103868649 A CN 103868649A CN 201210549873 A CN201210549873 A CN 201210549873A CN 103868649 A CN103868649 A CN 103868649A
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Abstract
The invention discloses an on-line dynamic balancing correction method for rotors of a double-rotor axial flow fan. According to the method, a rotating speed trigger cursor is arranged on a rotating shaft of the fan, a vibration acceleration sensor is arranged at the position of a rib plate on one side of an outer wall of an air duct, and vibration amplitudes and initial phases of two measuring points are measured by adopting a dynamic balancing correction function of a waveform analyzer; an impeller with high vibration amplitude is provided with a mass testing block, the vibration amplitudes and the phases of the two measuring points are measured again after startup, and the theoretic weight of a balancing weight, an installation position and an installation angle are calculated based on the vibration amplitudes and the phases of the two measuring points; for rigid and flexible foundation fans, two impellers are provided with balancing weights in a ratio according to the theoretic weight of the balancing weight, the installation position and the installation angle, and the vibration amplitudes and the phases of the two measuring points are detected again till the vibration amplitudes are in a normal range. The method can be used for on-line dynamic balancing correction of the rotors of the fan, detachment is avoided, the maintenance workload is reduced, the maintenance period is prolonged, and normal operation of fan equipment is guaranteed.
Description
Technical field
The present invention relates to the bearing calibration of a kind of birotor axial flow fans rotor on-line dynamic balancing.
Background technology
Axial flow blower is widely used in each field, pumps the gas medium of manufacturing technique requirent by air channel, and the integral installation of birotor axial flow blower is in air channel conventionally, and impeller is arranged on supporting bearing base both sides, and bearing seat is fixed on gusset.Axial flow fans rotor dynamic balance calibration is to guarantee blower fan normal reliable operation important procedure, due to the characteristic of axial flow blower, its shaft coupling, impeller and supporting bearing base are positioned at air channel, therefore in the time implementing rotor dynamic balancing correction operation, the basic dismounting mode that adopts is carried out off-line dynamic balance calibration to rotor, and this dismounting relates to air channel, blower fan and other corresponding equipment, workload and the time between overhauls(TBO) of greatly having improved upkeep operation, reduce work efficiency, affected the normal operation of Fan Equipment.
Summary of the invention
Technical matters to be solved by this invention is to provide the bearing calibration of a kind of birotor axial flow fans rotor on-line dynamic balancing, utilizing this method can implement fan rotor on-line dynamic balancing proofreaies and correct, avoid field-strip, reduced maintenance workload and cycle, ensured the normal operation of Fan Equipment.
For solving the problems of the technologies described above, birotor axial flow fans rotor on-line dynamic balancing of the present invention bearing calibration comprises the steps:
Step 1, rotating speed is triggered to cursor be fixed on fan shaft, selected vibration amplitude measurement point, two supporting bearing base of axial flow fan vane wheel are fixed in air channel and are located on the air flue rib plates at interval, and two measurement points are set in air channel outer wall and are provided with the bars position of bearing seat;
Step 2, two measurement points arrange respectively acceleration transducer, after fan operation, adopt the balance correction function of waveform analyzer, cursor position is phase place zero degree, degree of will speed up sensor output signal bandpass filtering treatment, detect blower fan and turn frequency vibration amplitude, it is prima facies place value that blower fan turns angle angle between peak frequently and cursor phase place zero degree, and waveform analyzer records respectively the vibration amplitude of two measurement points and the initial phase of two measurement points;
Vibration amplitude and the initial phase of two measurement points that obtain after the vibration amplitude of two measurement points that step 4, use step 2 obtain and initial phase and step 3 test mass carry out vector calculating, calculate respectively the theoretical balancing weight weight of two measurement points and installation site and angle;
Step 6, again after start, again detect vibration amplitude and the initial phase of two measurement points, as the vibration amplitude of two measurement points exceedes dynamic balance level value, repeated execution of steps two is to step 5, until the vibration amplitude of two measurement points is all within the scope of dynamic balance level.
Because birotor axial flow fans rotor on-line dynamic balancing of the present invention bearing calibration has adopted technique scheme, be that this method arranges rotating speed triggering cursor at fan shaft, acceleration transducer is installed in the measurement point position of two fixing gussets of impeller shaft bearing, adopts waveform analyzer to detect the vibration amplitude, the initial phase that obtain two measurement points; Test mass piece is installed on the impeller of the high measurement point of vibration amplitude, after start, is again detected vibration amplitude and the phase place of two measurement points, and calculate respectively accordingly theoretical balancing weight weight and installation site and angle; Respectively for rigid and flexible foundation blower fan, on two impellers, balancing weight is set in proportion by theoretical balancing weight weight and installation site and angle, again detect vibration amplitude and the phase place of two measurement points, until the vibration amplitude of two measurement points is all in normal range.This method can be implemented fan rotor on-line dynamic balancing and proofread and correct, and avoids field-strip, has reduced maintenance workload and cycle, has ensured the normal operation of Fan Equipment.
Brief description of the drawings
Below in conjunction with drawings and embodiments, the present invention is described in further detail:
Fig. 1 is birotor axial flow fans rotor on-line dynamic balancing bearing calibration measurement point schematic diagram of the present invention.
Embodiment
Birotor axial flow fans rotor on-line dynamic balancing of the present invention bearing calibration comprises the steps:
Step 1, as shown in Figure 1, rotating speed is triggered in the rotating shaft 11 that cursor 2 is fixed on blower fan 1, selected vibration amplitude measurement point, two bearing seats 14,15 that axial flow blower 1 is provided with impeller 12,13 are positioned at air channel 3 and are located on the air flue rib plates 31,32 at interval, and two measurement points 4,5 are set in air channel 3 outer walls and are provided with gusset 31,32 positions of bearing seat 14,15;
Step 2, two measurement points arrange respectively acceleration transducer, after fan operation, adopt the balance correction function of waveform analyzer, cursor position is phase place zero degree, degree of will speed up sensor output signal bandpass filtering treatment, detect blower fan and turn frequency vibration amplitude, it is prima facies place value that blower fan turns angle angle between peak frequently and cursor phase place zero degree, and waveform analyzer records respectively the vibration amplitude of two measurement points and the initial phase of two measurement points; The initial phase of two measurement points is triggered and is determined zero degree by rotating speed, can directly read vibration amplitude and phasing degree by the transient equilibrium function of waveform analyzer, and a lot of detecting instruments of this function all possess; The phase differential of two measurement points shows that the unbalance angle of two impellers is variant, unbalance position changes, therefore must on the gusset of two supporting bearing base, detect, each measurement point detects data and has represented the equilibrium condition of impeller nearby, between the data of its collection, there is independence, phase place difference, represents unbalance position difference, needs the position of counterweight variant;
Vibration amplitude and the initial phase of two measurement points that obtain after the vibration amplitude of two measurement points that step 4, use step 2 obtain and initial phase and step 3 test mass carry out vector calculating, calculate respectively the theoretical balancing weight weight of two measurement points and installation site and angle;
Step 6, again after start, again detect vibration amplitude and the initial phase of two measurement points, as the vibration amplitude of two measurement points exceedes dynamic balance level value, repeated execution of steps two is to step 5, until the vibration amplitude of two measurement points is all within the scope of dynamic balance level.
This dynamic balance calibrating method is simple to operate, in the case of avoiding a large amount of field-strip, the convenient on-line dynamic balancing correction operation of implementing fan rotor, a large amount of manpower and materials are saved, reduce overhaul of the equipments cost, improve overhaul efficiency, reduced the time between overhauls(TBO), ensured the normal operation of axial flow blower.
Claims (1)
1. a birotor axial flow fans rotor on-line dynamic balancing bearing calibration, is characterized in that this method comprises the steps:
Step 1, rotating speed is triggered to cursor be fixed on fan shaft, selected vibration amplitude measurement point, two supporting bearing base of axial flow fan vane wheel are fixed in air channel and are located on the air flue rib plates at interval, and two measurement points are set in air channel outer wall and are provided with the bars position of bearing seat;
Step 2, two measurement points arrange respectively acceleration transducer, after fan operation, adopt the balance correction function of waveform analyzer, cursor position is phase place zero degree, degree of will speed up sensor output signal bandpass filtering treatment, detect blower fan and turn frequency vibration amplitude, it is prima facies place value that blower fan turns angle angle between peak frequently and cursor phase place zero degree, and waveform analyzer records respectively the vibration amplitude of two measurement points and the initial phase of two measurement points;
Step 3, test mass piece is installed on the impeller of the high measurement point of vibration amplitude, after start, is again detected vibration amplitude and the initial phase of two measurement points;
Vibration amplitude and the initial phase of two measurement points that obtain after the vibration amplitude of two measurement points that step 4, use step 2 obtain and initial phase and step 3 test mass carry out vector calculating, calculate respectively the theoretical balancing weight weight of two measurement points and installation site and angle;
Step 5, carry out the distribution of balancing weight quality on birotor impeller, for rigid foundation blower fan, on the large impeller of vibration amplitude, install balancing weight additional by 2/3 weight of theoretical balancing weight weight and installation site and angle, on the little impeller of vibration amplitude, install balancing weight additional by 1/3 weight of theoretical balancing weight weight and installation site and angle; For flexible foundation blower fan, because detecting, the vibration amplitude of flexible foundation there is deviation, the actual balancing weight weight of theoretical balancing weight weight ratio is large, revise by 0.7 times, on the large impeller of vibration amplitude, install balancing weight additional by the 0.7X2/3 weight of theoretical balancing weight weight and installation site and angle, on the little impeller of vibration amplitude, install balancing weight additional by the 0.7X of theoretical balancing weight weight 1/3 weight and installation site and angle;
Step 6, again after start, again detect vibration amplitude and the initial phase of two measurement points, as the vibration amplitude of two measurement points exceedes dynamic balance level value, repeated execution of steps two is to step 5, until the vibration amplitude of two measurement points is all within the scope of dynamic balance level.
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| CN201210549873.9A CN103868649B (en) | 2012-12-18 | 2012-12-18 | Birotor axial flow fans rotor on-line dynamic balancing bearing calibration |
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| CN201210549873.9A CN103868649B (en) | 2012-12-18 | 2012-12-18 | Birotor axial flow fans rotor on-line dynamic balancing bearing calibration |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338363A (en) * | 2015-05-16 | 2017-01-18 | 江苏思维福特机械科技股份有限公司 | Dynamic balancing correction process |
| CN107219076A (en) * | 2017-06-02 | 2017-09-29 | 中国科学院工程热物理研究所 | A kind of experimental system of gas bearing rotor dynamics characteristic research |
| CN109932131A (en) * | 2019-04-15 | 2019-06-25 | 森思泰克河北科技有限公司 | Dynamic balancing antidote, terminal device and the storage medium of symmetric rotor |
| CN113623278A (en) * | 2021-09-08 | 2021-11-09 | 绍兴智新机电科技有限公司 | Dynamic balance method of multistage fan |
| CN113984283A (en) * | 2021-10-26 | 2022-01-28 | 宣城市雍基超镜面精密机械制造有限公司 | Dynamic balance test compensation method for large roller |
| CN114166420A (en) * | 2019-11-08 | 2022-03-11 | 深圳精匠云创科技有限公司 | Dynamic balance correction apparatus |
| CN114544080B (en) * | 2022-02-22 | 2024-04-19 | 北京电力设备总厂有限公司 | Dynamic balance comprehensive treatment method for flexible rotor to be overhauled |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111219350A (en) * | 2020-01-09 | 2020-06-02 | 中铁第十八工程局涿州水泵厂 | Conversion method of fan environment parameters |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338363A (en) * | 2015-05-16 | 2017-01-18 | 江苏思维福特机械科技股份有限公司 | Dynamic balancing correction process |
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| CN109932131A (en) * | 2019-04-15 | 2019-06-25 | 森思泰克河北科技有限公司 | Dynamic balancing antidote, terminal device and the storage medium of symmetric rotor |
| CN114166420A (en) * | 2019-11-08 | 2022-03-11 | 深圳精匠云创科技有限公司 | Dynamic balance correction apparatus |
| CN113623278A (en) * | 2021-09-08 | 2021-11-09 | 绍兴智新机电科技有限公司 | Dynamic balance method of multistage fan |
| CN113984283A (en) * | 2021-10-26 | 2022-01-28 | 宣城市雍基超镜面精密机械制造有限公司 | Dynamic balance test compensation method for large roller |
| CN114544080B (en) * | 2022-02-22 | 2024-04-19 | 北京电力设备总厂有限公司 | Dynamic balance comprehensive treatment method for flexible rotor to be overhauled |
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Address after: No. 3520 Tongji Road, Baoshan District, Shanghai, 201900 Patentee after: Baowu equipment Intelligent Technology Co., Ltd Address before: 201900, 335, Pu Pu Road, Shanghai, Baoshan District Patentee before: SHANGHAI BAOSTEEL INDUSTRY TECHNOLOGICAL SERVICE Co.,Ltd. |