CN103453829A - Method for measuring sliding bearing motor magnetic force central position - Google Patents

Method for measuring sliding bearing motor magnetic force central position Download PDF

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Publication number
CN103453829A
CN103453829A CN2013104143283A CN201310414328A CN103453829A CN 103453829 A CN103453829 A CN 103453829A CN 2013104143283 A CN2013104143283 A CN 2013104143283A CN 201310414328 A CN201310414328 A CN 201310414328A CN 103453829 A CN103453829 A CN 103453829A
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CN
China
Prior art keywords
motor
magnetic force
bearing
sounding rod
distance
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CN2013104143283A
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Chinese (zh)
Inventor
谢鸿钢
田野
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中国能源建设集团天津电力建设公司
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Priority to CN2013104143283A priority Critical patent/CN103453829A/en
Publication of CN103453829A publication Critical patent/CN103453829A/en

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Abstract

The invention provides a method for measuring a sliding bearing motor magnetic force central position. The method is achieved through selection of a method for measuring the position of a rotor iron core and the position of a stator iron core and calculation and confirmation of a magnetic force central alignment position under the condition that a stator and a rotor rotate. The method includes the steps of firstly measuring the distance L1 between the end face a coupler neck and a bearing end cover, then measuring the distance between the rotor iron core and a measuring rod and the distance between the stator iron core and the measuring rod, obtaining motor magnetic force central position deviation lambda through calculation, and finally determining the motor magnetic force central position L, wherein L is equal to L1+lambda. The method is accurate and reliable in measuring and calculating data, a motor and a fan are made to operate smoothly when a coupler is aligned, and the reworking phenomenon that the coupler of the fan and the motor are aligned again due to the fact that the motor magnetic force central deviation is larger is avoided. According to the method, accurate measurement of the magnetic force central position is achieved, the devices are made to run stably in the pilot run period, and the phenomena that vibration of the motor and vibration of the fan are influenced or grinding and burning of a motor bearing bush are caused due to the fact that axial movement of the motor occurs in operation because of inaccuracy of the magnetic force central position are avoided.

Description

A kind of sliding bearing motor magnetic force center position measurement method
Technical field
This sliding bearing motor magnetic force center position measurement method, be before the sliding bearing drive motor of large fan is installed centering at the construction field (site), a kind of new technology of carrying out the location confirmation of motor magnetic force center by measurements and calculations.
Background technology
The large fan of fuel-burning power plant (as primary air fan, induced draft fan) is used the sliding bearing motor as drive motor usually.This type sliding bearing drive motor mainly is comprised of motor case, rotor portions, stator section, cooling system, sliding support bearing etc.; When motor rotates, rotor is by the movement on sliding bearing, the position of the magnetic field centering that rotor section and stator section are formed is the magnetic force center position, whether the motor magnetic force center accurately directly affects the normal operation of motor and blower fan, when serious, can affect the stable of power generator group.Determine that the effective method of motor magnetic force center is motor to be switched on power carry out preliminary operation, but while installing at the construction field (site), be not possess this condition, so just formed current working-yard, the magnetic force center method for determining position is had to two kinds: before motor is installed centering, motor is hung on Motor Foundation, use parallels to adjust axial, the radial level of motor, then method one: according to sign given on producer's equipment, by confirming that shaft coupling axle neck end face is determined to the distance of the anterior bearing cap end cap of motor; But due to reasons such as equipment way far away transportation and stored on-site, can make to identify active, damage, the problem such as smudgy, the data accuracy is impacted, method two: while in producer, there is no given sign, open the motor bearings upper cover, measure the distance of bearing shell and the shaft shoulder, get equal method according to bearing shell two side clearances and confirmed; The magnetic force center deviation that the method is confirmed is larger.
Two kinds of magnetic force center position confirming methods often can cause motor magnetic force center position deviation to exceed the allowed band of technical manual in sum; thereby cause the axial vibration of During Trail Operation motor, blower fan to exceed standard, also can often occur that the motor bearings black golden tile weares and teares, the problems such as watt temperature is too high, tile kilning.
Summary of the invention
The present invention seeks to overcome existing method above shortcomings, provide that a kind of simple operation, running program are few, the data measuring method of sliding bearing motor magnetic force center position accurately.
The step of sliding bearing motor magnetic force center location measurement method provided by the invention comprises:
1st, motor is in place: with crane, the motor level is hung on strong basis or framework;
2nd, see accompanying drawing 2 shaft coupling neck end faces and bearing (ball) cover measurement: (vernier caliper that is 300mm by measurement range) measures shaft coupling neck end face and bearing (ball) cover distance, is recorded as L 1;
3rd, electric motor end cap is removed: top, the front and back end cap of removing motor;
4th, the bearing seat upper cover is removed, is cleared up: pull down upper bearing lid and the upper bearing of the front end bearing block of motor, the upper surface of clearing axis bearing faying face and axle;
5th, motor leveling: use inclined sizing block to adjust the level of motor, by the frame level, on the bearing seat faying face of the 4th step cleaning and axle, detect motor axially, the level of horizontal radial;
6th, magnet base and mark post location: the magnet base of dial gauge is fixed on the axle in electric motor end cap, and loads onto sounding rod at magnet base;
7th, use the Steel Ruler qualified through verification measure motor front end rotor core to sounding rod apart from a: evenly measure 8 points, corresponding data is recorded as a 1, a 2a 3a 4a 8, a value is got eight mean values of measuring numerical value;
8th, use the Steel Ruler qualified through verification to measure the distance b of motor front end stator iron core to sounding rod: evenly measure 8 points, corresponding data is recorded as b 1, b 2b 3b 4b 8, the b value is got eight mean values of measuring numerical value;
9th, motor front end rotor core is to the distance b difference λ to sounding rod apart from a and motor front end stator iron core of sounding rod 1for a-b;
10th, use the Steel Ruler qualified through verification to measure the distance c of motor rear end rotor core to sounding rod: evenly measure 8 points, corresponding data is recorded as c 1, c 2c 3c 4c 8, the c value is got eight mean values of measuring numerical value;
11st, use the Steel Ruler qualified through verification measure motor rear end stator iron core to sounding rod apart from d: evenly measure 8 points, corresponding data is recorded as d 1, d 2d 3d 4d 8, the d value is got eight mean values of measuring numerical value;
12nd, motor rear end stator iron core is to the difference λ to the distance c of sounding rod apart from d and motor rotor core of sounding rod 2for d-c;
13rd, motor magnetic force center position deviation λ is designated as (λ 1+ λ 2)/2;
14th, see accompanying drawing 3 motor magnetic force center location confirmations: L is designated as L 1+ λ value, motor is under rotation status, its magnetic force center is in aligned position, deviation be not more than 1mm(λ on the occasion of the time, L increases; When λ is negative value, L reduces).
 
advantage of the present invention and beneficial effect:
1) the present invention by measure motor stator, rotor core to sounding rod apart from difference, and come as calculated to determine electric
The method of machine magnetic force center position, operation is convenient, and measuring and calculating accurately, is suitable for the working-yard operation;
2) the present invention, to the determining of motor magnetic force center position, can accurately locate motor Fan Equipment when junction box levelling, improves the construction one-time success rate, avoids doing over again;
3) Accurate Determining of the present invention to motor magnetic force center position, in the time of can avoiding moving motor occur that axle is altered, motor and fan vibration, motor bearings tile kilning etc. problem, improve stable equipment operation.
?
the accompanying drawing explanation:
Fig. 1 motor is always schemed
Fig. 2 is motor magnetic force center position measurement figure (top cut-open view).
Fig. 3 is motor magnetic force center position location map (top cut-open view).
In accompanying drawing, 1 shaft coupling, 2 bearing housings, 3 axles, 4 rotors, 5 front end rotor cores, 6 front end stator iron cores, 7 motor stators, 8 refrigeratorys, 9 rear end stator iron cores, 10 rear end rotor cores, 11 cooling wheels, the 12 cooling crusts of weathering, 13 motor housings.L shaft coupling neck footpath end face and bearing housing tip-to-face distance.
 
Embodiment
embodiment:
Construction by the present invention for the primary air fan of fired power generating unit, be installed as example with certain engineering 2 * 350MW Cogeneration Project engineering 1# boiler 1# primary air fan.
1 overview
Certain 2 * 350MW heat supply unit, the 1# unit is installed two centrifugal blowers that model is SFG22F-C5A by Shenyang Blower Factory production.Every general assembly (TW) of primary air fan is 13642Kg, and the rotor general assembly (TW) is 3409Kg.Every primary air fan mainly comprises rotor set, casing, inlet box, air inlet, adjustment doors, spring bearing section and a thrust bearing section etc.Blower fan is by direct motor drive, and the drive motor model is YSPKK630-4, and the motor bearings form is sliding bearing, and power of motor is 1900KW, motor speed 1488 r/min, and, manufacturer is Xiangtan Electrical Machinery Plant.
2 motor platen leveling
After fan casing and rotor etc. is partly installed centering and completed, motor platen hoisted in position, on basis, is used 4 groups of parallels to adjust platen and is less than 0.10mm/m. to level in length and breadth
3 motor leveling
1) add the pad of 2mm on the motor platen.
2) utilize truck that motor is transported to by Motor Foundation, use boiler main loop wheel machine tool unload and hang motor on the motor platen and the coupling bolt of fastening motor and platen.
3) pull down the forward and backward end cap of motor; Pull down the forward and backward bearing upper cover of motor.
4) by adjusting the inclined sizing block group levelling motor under the motor platen, interface position at the front and back bearings place is used the 150mm frame level to detect motor in length and breadth to level, levelness is less than 0.10mm/m, uses iron level to detect motor on the sidepiece housing of motor and wants vertical.
4 magnetic force center position findings
1) magnet base and mark post location: the magnet base of dial gauge is fixed on the axle in electric motor end cap, and loads onto sounding rod at magnet base;
2) use through 1 meter qualified Steel Ruler of verification and divide the distance of eight point measurement motor front end rotor cores to sounding rod; Be a 1, a 2a 3a 4a 8corresponding data is recorded as 611,612,610,611,612,610,611,610; Motor front end rotor core equals 610.88mm to the mean value a of the distance of sounding rod;
3) use through 1 meter qualified Steel Ruler of verification and divide the distance of eight point measurement motor front end stator iron cores to sounding rod; Be b 1, b 2b 3b 4b 8corresponding data is recorded as 605,605,606,606,605,604,604,604, and motor front end stator iron core equals 604.88mm to the mean value b of the distance of sounding rod;
4) motor front end rotor core to sounding rod the distance with motor front end stator iron core to sounding rod apart from difference λ 1for a-b, note 610.88-604.88=6mm;
5) use through 1 meter qualified Steel Ruler of verification and divide the distance of eight point measurement motor rear end rotor cores to sounding rod: be i.e. c 1, c 2c 3c 4c 8corresponding data is recorded as 727,726,727,725,726,725,726,727, and the motor rear end rotor core equals 726.13mm to the mean value c of the distance of sounding rod;
6) use through 1 meter qualified Steel Ruler of verification and divide the distance of eight point measurement motor rear end stator iron cores to sounding rod: be i.e. d 1, d 2d 3d 4d 8corresponding data is recorded as 731,730,732,731,730,730,731,731, and motor rear end stator iron core equals 730.75 to the mean value d of the distance of sounding rod;
7) motor rear end stator iron core is to the distance and the difference λ of motor rotor core to the distance of sounding rod of sounding rod 2for d-c, note 730.75-726.13=4.45mm;
8) motor magnetic force center position deviation λ is (λ 1+ λ 2)/2, be designated as (6+4.45)/2=5.23
9) the vernier caliper measurement shaft coupling neck end face that is 300mm by measurement range and the distance L of bearing (ball) cover end face 1for 271mm;
10) 1# motor magnetic force center location confirmation: L is designated as L 1the value of+λ, i.e. 276.23mm, when these data, stator and rotor situation lower magnetic force central alignment.
5 location, motor magnetic force center positions
Adjust the position of rotor and stator according to the L value (276.23mm) of having measured, be about to rotor to reach 5.23mm,
Keeping motor coupler neck end face and front end bearing housing end face distance is 276.23mm.
6 junction box levellings
Under the state that guarantees motor magnetic force center invariant position, the shaft coupling of Nature Link blower fan and motor; And take blower fan and carry out the junction box levelling of motor and blower fan as benchmark is used dial gauge, the centering deviation is not more than 0.08mm, and back-grouting is carried out in the centering acceptance(check).

Claims (1)

1. a sliding bearing motor magnetic force center position measurement method is characterized in that the step of the method comprises:
1st, motor is in place: with crane, the motor level is hung on strong basis or framework;
2nd, shaft coupling neck end face and bearing (ball) cover are measured: measure shaft coupling neck end face and bearing (ball) cover distance, be recorded as L 1;
3rd, electric motor end cap is removed: top, the front and back end cap of removing motor;
4th, the bearing seat upper cover is removed, is cleared up: pull down upper bearing lid and the upper bearing of the front end bearing block of motor, the upper surface of clearing axis bearing faying face and axle;
5th, motor leveling: use inclined sizing block to adjust the level of motor, by the frame level, on the bearing seat faying face of the 4th step cleaning and axle, detect motor axially, the level of horizontal radial;
6th, magnet base and mark post location: the magnet base of dial gauge is fixed on the axle in electric motor end cap, and loads onto sounding rod at magnet base;
7th, use the Steel Ruler qualified through verification measure motor front end rotor core to sounding rod apart from a: evenly measure 8 points, corresponding data is recorded as a 1, a 2a 3a 4a 8, a value is got eight mean values of measuring numerical value;
8th, use the Steel Ruler qualified through verification to measure the distance b of motor front end stator iron core to sounding rod: evenly measure 8 points, corresponding data is recorded as b 1, b 2b 3b 4b 8, the b value is got eight mean values of measuring numerical value;
9th, motor front end rotor core is to the distance b difference λ to sounding rod apart from a and motor front end stator iron core of sounding rod 1for a-b;
10th, use the Steel Ruler qualified through verification to measure the distance c of motor rear end rotor core to sounding rod: evenly measure 8 points, corresponding data is recorded as c 1, c 2c 3c 4c 8, the c value is got eight mean values of measuring numerical value;
11st, use the Steel Ruler qualified through verification measure motor rear end stator iron core to sounding rod apart from d: evenly measure 8 points, corresponding data is recorded as d 1, d 2d 3d 4d 8, the d value is got eight mean values of measuring numerical value;
12nd, motor rear end stator iron core is to the difference λ to the distance c of sounding rod apart from d and motor rotor core of sounding rod 2for d-c;
13rd, motor magnetic force center position deviation, λ is designated as (λ 1+ λ 2)/2;
14th, motor magnetic force center location confirmation: L is designated as L 1+ λ value, motor is under rotation status, and its magnetic force center is in aligned position, and deviation is not more than 1mm; λ be on the occasion of the time, L increases; When λ is negative value, L reduces.
CN2013104143283A 2013-09-12 2013-09-12 Method for measuring sliding bearing motor magnetic force central position CN103453829A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104659966A (en) * 2015-03-17 2015-05-27 宁波市成大机械研究所 Alignment method for centers of magnetic forces of stator and rotor of large motor with box-type case
CN105743307A (en) * 2016-04-25 2016-07-06 中国一冶集团有限公司 Magnetic force central line alignment method of large-sized motor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090064522A1 (en) * 2007-03-20 2009-03-12 William Lee Herron Multi sensor clearance probe
CN202350723U (en) * 2011-11-11 2012-07-25 天津电力建设公司 Fixing support for centre alignment for paired wheels of large steam turbine
CN202770445U (en) * 2012-08-28 2013-03-06 湘潭电机股份有限公司 Stator center detection device
CN102975013A (en) * 2011-09-07 2013-03-20 五冶集团上海有限公司 Low temperature exhaust heat recycling turbine generator rotor predetermined center installation method
CN203053393U (en) * 2013-01-01 2013-07-10 中船重工电机科技股份有限公司 An alignment detection ruler for stator and rotor magnetic force centers of a motor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090064522A1 (en) * 2007-03-20 2009-03-12 William Lee Herron Multi sensor clearance probe
CN102975013A (en) * 2011-09-07 2013-03-20 五冶集团上海有限公司 Low temperature exhaust heat recycling turbine generator rotor predetermined center installation method
CN202350723U (en) * 2011-11-11 2012-07-25 天津电力建设公司 Fixing support for centre alignment for paired wheels of large steam turbine
CN202770445U (en) * 2012-08-28 2013-03-06 湘潭电机股份有限公司 Stator center detection device
CN203053393U (en) * 2013-01-01 2013-07-10 中船重工电机科技股份有限公司 An alignment detection ruler for stator and rotor magnetic force centers of a motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104659966A (en) * 2015-03-17 2015-05-27 宁波市成大机械研究所 Alignment method for centers of magnetic forces of stator and rotor of large motor with box-type case
CN105743307A (en) * 2016-04-25 2016-07-06 中国一冶集团有限公司 Magnetic force central line alignment method of large-sized motor

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Inventor after: Xie Honggang

Inventor after: Tian Ye

Inventor after: Zhang Qingnian

Inventor after: Fu Xiujun

Inventor before: Xie Honggang

Inventor before: Tian Ye

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Free format text: CORRECT: INVENTOR; FROM: JIA HUAIJIE CHEN GUOHUA TO: JIA HUAIJIE CHEN GUOHUA HE XIAOBING XU HAIXIA

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COR Change of bibliographic data

Free format text: CORRECT: APPLICANT; FROM: TIANJIN ELECTRIC POWER CONSTRUCTION COMPANY OF CHINA ENERGY ENGINEERING CO., LTD. TO: CEEC TIANJIN ELECTRIC POWER CONSTRUCTION CO., LTD.

CB02 Change of applicant information

Address after: 300041 Engineering Center, 23 floor, harbour center, No. 240 Zhang Zi-zhong Road, Heping District, Tianjin

Applicant after: CHINA ENERGY ENGINEERING GROUP TIANJIN ELECTRIC POWER CONSTRUCTION CO., LTD.

Address before: 300041 Engineering Center, 23 floor, harbour center, No. 240 Zhang Zi-zhong Road, Heping District, Tianjin

Applicant before: Tianjin Electric Power Construction Company of China Energy Engineering Group

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Application publication date: 20131218