CN102969822B - Bearing-replaceable motor structure and replacement method of motor bearings - Google Patents
Bearing-replaceable motor structure and replacement method of motor bearings Download PDFInfo
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- CN102969822B CN102969822B CN201210451782.1A CN201210451782A CN102969822B CN 102969822 B CN102969822 B CN 102969822B CN 201210451782 A CN201210451782 A CN 201210451782A CN 102969822 B CN102969822 B CN 102969822B
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Abstract
The invention relates to a bearing-replaceable motor structure and a replacement method of motor bearings. A spindle (6) of the bearing-replaceable motor structure is divided into a middle shaft section (602) and two shaft extension sections (601 and 603) which are positioned on two sides of the middle shaft section (602). Small detachable end covers (71) are respectively arranged in the middles of end covers on two sides of a motor. Bearings (51) are arranged between the shaft extension section (601) and center holes of the small end covers (71). A bearing end assembly part is formed by the small end covers (71), the shaft extension section (601), the bearings (51) and bearing sealing accessories (811 and 812). When the bearings (51) need replacing, users firstly fix a rotor (4), remove bolt connection between the shaft extension section (601) and the middle shaft section (602) and bolt connection between the small end covers (71) and the end covers (11) of the motor, integrally detach the bearing end assembly part along the axial direction of the motor, install a new bearing end assembly part in place along the axial direction of the motor, recover the bolt connection between the shaft extension section (601) and the middle shaft section (602) and the bolt connection between the small end covers (71) and the end covers (11) of the motor, and remove the fixation of the rotor (4).
Description
Technical field
The present invention relates to the removable electric machine structure of a kind of bearing and change motor bearings method.
Background technology
Conventional inner rotor motor, primarily of the stator of support, inboard wall of base, the end cap of support both sides, main shaft, is arranged on the parts compositions such as rotor on main shaft and bearing, and bearing is arranged between end cap and main shaft, plays the effect of fixed support main shaft.The accounting of bearing in motor assembly basis is very little, but the vitals in motor, its runnability directly will affect electrical machinery life, for the motor of some special purpose, such as at the wind-driven generator that height is installed in the air, the dismounting expense of motor is the price being far longer than bearing, therefore develops engineering significance and economic benefit that the removable electric machine structure of bearing has reality.
The replacing of bearing comprises dismounting, installs and the step such as play adjustment and pretension.According to the size of bearing and the mated condition with axle, the unloading process of bearing has cold dismounting and heat dismounting two types, and the installation process of bearing also has cold installation and heat to install two types.For installing the replacing that cooperation is not too tight little bearing, suitable drawbench can be adopted to be extracted by bearing integral, and then utilize special frock to be installed by the mode of knocking.The small size bearing (as without rib or the cylinder roller bearing only having side band rib) that Internal and external cycle is separated, by after outer ring and roller removal, special heating devices heat inner ring can be utilized, then by special bearing extracting apparatus, inner ring extracted.For the installation of pedestal, inner ring and outer ring can be installed respectively, but must guarantee that inner ring aims at outer ring, to avoid raceway and the rolling element of score bearings.For relatively large bearing, if install in an interference fit, the larger power of general needs just can unload bearing.Especially through Long-Time Service, the bearing of wriggling etching problem may be had.Therefore, when dismantling large-scale bearing, creosoting process is adopted to be easier method, but the oil circuit must processed in Bearing configuration needed for some and oil groove.And the installation of relatively large bearing needs larger power just bearing can be in place equally, be generally impossible with mechanical cold mounting method.Therefore likely need the method adopting heat to install, whole bearing, inner ring or bearing pedestal are heated in a pre-installation.In addition, for the bearing be in place, some also needs to utilize special equipment to carry out play adjustment and pretension, to reach the object improving rigidity, reduce noise and prolongation working life.
Bearing is the precise part in motor, dismounting and installation process must be adopted on sound lines, correct instrument and keep environment clean.Inappropriate unloading process will damage the axial plane with bearing fit, and inappropriate installation process will damage bearing, and this all will have a strong impact on the life-span of the new bearing installed.At motor spot replace bearing, be often limited by space and condition restriction, the instrument of a lot of dismounting cannot be arranged, the unsurmountable difficulty to the Renewal process band of bearing.In addition change at the scene bearing also must face a new bearing install before a process difficult problem, if bearing is dealt with improperly (such as packages in damaged condition etc.), pollutant is then likely made to enter bearing, and bearing is coated with rust inhibitor before dispatching from the factory, if do not carry out suitable cleaning and dry, to bearing lubrication be had influence on, bearing life is reduced.These all propose stern challenge to the spot replace process of bearing above.
Chinese patent 200510046344.7 proposes a kind of method that in critical aircraft engine parts, oscillating bearing is changed, Chinese patent 201110123957.1 proposes the simple and easy replacing options of bearing for megawatt wind turbine, Chinese patent 201110338054.5 proposes a kind of replacing options of bearing, application number be 200980126460.6 patent propose a kind of wind turbine comprising base bearing and the method changing this base bearing, the Method and process process at mechanical equipment installation spot replace bearing body is also confined to about the removable design of bearing above in each patent and document, topmost deficiency is exactly all difficulties of not considering that bearing spot replace can run into and the assessment to new bearings mounted installation quality and operational effect.
Summary of the invention
The object of the invention is to overcome the difficulty that prior art changes bearing, propose the removable electric machine structure of a kind of bearing and change the method for motor bearings.
Motor shaft of the present invention is sectional design, and electric motor end cap intermediate arrangement has dismountable small end cover.Small end cover, shaft extension section, bearing and bearing seal annex composition bearing end build-up member.The Renewal process of bearing does not need to change bearing body separately, only need to need the bearing end build-up member entirety changed to remove, then the new bearing end build-up member integral installation assembled in factory is put in place, reduce work on the spot amount, reduce the difficulty that motor bearings is changed.
The present invention by the following technical solutions.
Motor of the present invention is made up of the stator of support, inboard wall of base, the end cap of support both sides, main shaft, the parts such as rotor and bearing be arranged on main shaft.
Described electric machine main shaft is segmented: main shaft is divided into middle shaft part and is positioned at two shaft extension sections of middle shaft part both sides, with bolts between middle shaft part and two shaft extension sections.Middle shaft part adopts the methods such as welding or interference fit to be arranged in rotor bore.
Respectively be equipped with one in the middle of the end cap of described motor both sides and have dismountable small end cover, described small end cover and the end cap of motor are bolted, and also can adopt to dismantle to be separated and other connected modes that can again install.The maximum outside diameter of two described shaft extension sections is less than the internal diameter of the end cap mating surface of small end cover and motor.
The external diameter of described shaft extension section upper bearing (metal) installation site matches with the inner ring of bearing, small end cover also uses as bearing pedestal, the internal diameter of small end cover centre bore matches with the outer shroud of bearing, and bearing is arranged between shaft extension section and small end cover, plays the effect of fixed support main shaft.In addition some bearing seal annexes are also had to be arranged on small end cover, described bearing seal annex comprises the bearing seal enclosing cover and bearing seal inner cap etc. that are positioned at bearing both sides, play sealed bearing, prevent lubricating oil (fat) from leaking and enter the effect of bearing body with foreign matter particle.Small end cover, shaft extension section, bearing and bearing seal annex composition bearing end build-up member.
The end cap of described motor both sides has manhole, for the turnover of rotor fixing tool and bolted dismounting construction between the shaft extension section of motor and middle shaft part.
The Renewal process of bearing is divided into following step:
First the first step needs rotor to fix.Due to the effect of gravity and magnetic pull, if remove the support of bearing, rotor axis will offset with axis stator, light then affect airgap uniformity degree and then affect motor quality, heavy then rotor outer surface and stator inner surface can collide with and side swipe, so must first be fixed by rotor before replacing bearing;
Second step be remove the shaft extension section of motor and middle shaft part respectively, bolt between small end cover and electric motor end cap connects, will need the old bearing end build-up member changed along electrical axis direction overall removal;
3rd step is in place along electrical axis direction by new bearing end build-up member, recovers shaft extension section and middle shaft part, bolt between small end cover and electric motor end cap connects.
Be finally remove rotor to fix, complete bearing replacing.
Advantage of the present invention does not need to change bearing body in motor erecting bed, but by the shaft extension section and bearing pedestal (i.e. small end cover) overall removal with bearing fit, again the new bearing end build-up member assembled in the factory of ground is in place, so just eliminate the various instrument required for motor erecting bed dismounting bearing body and frock, reduce difficulty and the workload of motor erecting bed dismounting bearing, also improve the installation quality of bearing, for the reliability service of motor provides guarantee simultaneously.
The present invention is not only applicable to motor, is also applicable to the rotating machinery structure that other have bearing replacing to need.
Accompanying drawing content
Fig. 1 is the overall structure schematic diagram of motor;
Fig. 2 is bearing end build-up member structural representation;
Fig. 3 is bearing end build-up member overall pulling down schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
The overall structure of motor of the present invention as shown in Figure 1.Motor is made up of the second end cap 12 of the stator 3 of support 2, inboard wall of base, the first end cap 11 of support side and support opposite side, main shaft 6, the parts such as rotor 4 and two bearings be arranged on main shaft.
Electric machine main shaft in the present invention is segmented, and namely main shaft is divided into middle shaft part 602 and two shaft extension sections 601 and 602.First shaft extension section 601 is positioned at the side of middle shaft part 602, and the second shaft extension section 603 is positioned at the opposite side of middle shaft part 602, with bolts between middle shaft part 602, first shaft extension section 601 and the second shaft extension section 603 3 sections.Middle shaft part 602 adopts the methods such as welding or interference fit to be arranged in rotor 4 centre bore.Also can cancel middle shaft part, two shaft extension sections are directly fixed by bolts on the end face of rotor 4 centre bore both sides.
Due to the structural similarity of motor case both sides in the present invention, be only described with the structure of motor case side therefore.
Have one to have dismountable small end cover 71 in the middle of the end cap 11 of described motor, small end cover 71 is bolted with the end cap 11 of motor.The maximum outside diameter of shaft extension section 601 is less than the internal diameter of small end cover 71 and electric motor end cap 11 mating surface.
The external diameter of described shaft extension section 601 upper bearing (metal) installation site matches with the inner ring of bearing 51, small end cover 71 also uses as bearing pedestal, the internal diameter of the centre bore of small end cover 71 matches with the outer shroud of bearing 51, bearing 51 is arranged between shaft extension section 601 and small end cover 71, plays the effect of fixed support main shaft.In addition also have bearing seal annex to be arranged on small end cover 71, comprise the bearing seal enclosing cover 811 that is positioned at bearing both sides and bearing seal inner cap 812 etc.Small end cover 71, shaft extension section 601, bearing 51 and bearing seal annex composition bearing end build-up member.As shown in Figure 2.
The Renewal process of bearing 51 is divided into following step:
First rotor 4 is fixed by the first step.Can adopt in the air gap between stator 3 and rotor 4 and fill in stainless steel voussoir 9 or adopt specific frock rotor 4 and end cap 11 or casing 2 to be fixed.
Second step be remove shaft extension section 601 and middle shaft part 602 respectively, bolt between small end cover 71 and electric motor end cap 11 connects, will need the old bearing end build-up member changed along electrical axis direction overall removal, as shown in Figure 3.
3rd step is in place along electrical axis direction by brand-new bearing end build-up member, recovers shaft extension section 601 and middle shaft part 602, bolt between small end cover 71 and electric motor end cap 11 connects.
Be finally remove rotor 4 to fix, so namely complete bearing 51 and change.
Claims (4)
1. the removable electric machine structure of bearing, it is characterized in that, described electric machine structure, by the stator (3) of support (2), inboard wall of base, the end cap (11,12) of support both sides, main shaft (6), is arranged on rotor (4) on main shaft (6) and bearing composition; Described main shaft (6) is segmented, described main shaft (6) is divided into middle shaft part (602) and is positioned at two shaft extension sections (601,603) of middle shaft part both sides, with bolts between middle shaft part (602) and two shaft extension sections (601,603); Middle shaft part (602) is arranged in rotor bore; The small end cover (71) respectively having one to have in the middle of the end cap (11) of motor both sides can to dismantle, described small end cover (71) is connected with bolt with electric motor end cap (11); Bearing (51) is installed between shaft extension section (601) and small end cover (71) centre bore; The maximum outside diameter of shaft extension section (601) is less than the internal diameter of end cap (11) mating surface of described small end cover (71) and motor.
2., according to electric machine structure according to claim 1, it is characterized in that the middle shaft part (602) described in cancelling, two shaft extension sections (601,603) are directly bolted on the end face of the centre bore both sides of rotor (4).
3., according to electric machine structure according to claim 1, it is characterized in that motor two side ends covers and have manhole (111), for the turnover of rotor fixing tool.
4. the motor bearings replacing options of electric machine structure according to claim 1, is characterized in that, described replacing options comprises the following steps:
1) frock is utilized to be fixed by rotor (4);
2) remove shaft extension section (601) respectively and middle shaft part (602), bolt between small end cover (71) and electric motor end cap (11) connect, the old bearing end build-up member of replacing will be needed along electrical axis direction entirety removal;
3) brand-new bearing end build-up member is in place along electrical axis direction, recover shaft extension section (601) and middle shaft part (602), between small end cover (71) and electric motor end cap (11) bolt connection;
4) remove rotor (4) to fix, complete bearing (51) and change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210451782.1A CN102969822B (en) | 2012-11-12 | 2012-11-12 | Bearing-replaceable motor structure and replacement method of motor bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210451782.1A CN102969822B (en) | 2012-11-12 | 2012-11-12 | Bearing-replaceable motor structure and replacement method of motor bearings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102969822A CN102969822A (en) | 2013-03-13 |
| CN102969822B true CN102969822B (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210451782.1A Active CN102969822B (en) | 2012-11-12 | 2012-11-12 | Bearing-replaceable motor structure and replacement method of motor bearings |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104214229B (en) * | 2014-08-14 | 2016-06-01 | 梅县梅雁旋窑水泥有限公司 | Use the axle lash-up recovering method of fast axis joint |
| CN111396372B (en) * | 2020-04-08 | 2021-04-13 | 中车洛阳机车有限公司 | Method for reducing mechanical noise of locomotive blower |
| CN112448523A (en) * | 2020-11-25 | 2021-03-05 | 中车永济电机有限公司 | Motor bearing modular structure easy to replace |
Citations (6)
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| CN1665665A (en) * | 2002-07-09 | 2005-09-07 | 西门子公司 | Drive apparatus for a plastics processing machine |
| CN101083409A (en) * | 2006-05-30 | 2007-12-05 | 日本电产芝浦株式会社 | Motor and manufacturing method thereof |
| CN201332312Y (en) * | 2008-12-26 | 2009-10-21 | 广东省东莞电机有限公司 | Assembling structure of high-voltage electric motor bearing |
| JP2009281318A (en) * | 2008-05-23 | 2009-12-03 | Kubota Corp | Pump and assembly method of pump |
| CN102104292A (en) * | 2009-12-17 | 2011-06-22 | 罗伯特·博世有限公司 | Electromotor especially used for wiper driving device |
| CN202215620U (en) * | 2011-08-02 | 2012-05-09 | 江苏赛德力制药机械制造有限公司 | Inner-drawing type vertical bearing seat structure of centrifugal machine |
-
2012
- 2012-11-12 CN CN201210451782.1A patent/CN102969822B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1665665A (en) * | 2002-07-09 | 2005-09-07 | 西门子公司 | Drive apparatus for a plastics processing machine |
| CN101083409A (en) * | 2006-05-30 | 2007-12-05 | 日本电产芝浦株式会社 | Motor and manufacturing method thereof |
| JP2009281318A (en) * | 2008-05-23 | 2009-12-03 | Kubota Corp | Pump and assembly method of pump |
| CN201332312Y (en) * | 2008-12-26 | 2009-10-21 | 广东省东莞电机有限公司 | Assembling structure of high-voltage electric motor bearing |
| CN102104292A (en) * | 2009-12-17 | 2011-06-22 | 罗伯特·博世有限公司 | Electromotor especially used for wiper driving device |
| CN202215620U (en) * | 2011-08-02 | 2012-05-09 | 江苏赛德力制药机械制造有限公司 | Inner-drawing type vertical bearing seat structure of centrifugal machine |
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| CN102969822A (en) | 2013-03-13 |
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