CN104483055A - Device and method for measuring axial force of rotor bearing of three-phase induction motor - Google Patents
Device and method for measuring axial force of rotor bearing of three-phase induction motor Download PDFInfo
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- CN104483055A CN104483055A CN201410745159.6A CN201410745159A CN104483055A CN 104483055 A CN104483055 A CN 104483055A CN 201410745159 A CN201410745159 A CN 201410745159A CN 104483055 A CN104483055 A CN 104483055A
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Abstract
The invention relates to a device and a method for measuring the axial force of a rotor bearing of a three-phase induction motor. The device comprises a rear end cover of the motor and a rotary shaft of the motor, wherein bolt mounting holes are distributed in the rear end cover of the motor. The device for measuring the axial force of the rotor bearing of the three-phase induction motor is characterized in that a bolt, a force measurement sensor with a displayer, cooling lubricating oil and the rotary shaft of the motor are arranged on the rear end cover of the motor; the rear end cover is provided with a mounting positioning ring plate, a central bolt hole, a wire leading-out hole and a positioning hole. During measurement, the measurement device is well mounted, the size of the axial force is calculated theoretically, the force measurement sensor has certain pre-tightening force by regulating the bolt, the motor is started, and then the force value change of the displayer of the force measurement sensor is observed. The device is simple in process, simple in auxiliary structure production and convenient to operate; moreover, the problem about testing of the axial force of the rotor bearing of the three-phase induction motor in the prior art is solved, and the device and the method play an important role in analysis of bearing type selection and improvement of an entire motor technology.
Description
Technical field
The present invention relates to a kind of three-phase induction motor rotor bearing axial force measuring device and measuring method, be mainly used in the axial force measuration of rotor bearing in track blower fan.
Background technology
Fan rotor system is one of kernel component of blower fan system, rotor-bearing system actual loading situation is not also tested at present accordingly, current is obtained by desirable theory calculate to the stressed of rotor external applied load, but the sign of characteristic parameter differs greatly, as on bearing life, relatively large with the difference of reality, the actual loading of bearing life and bearing has much relations.Transverse bearing mainly carries radial force, for axial force to bear requirement very little, and for the blower fan of the vertical installation of track, rotor bearing bears axial force greatly, but be difficult to calculate actual load by theory calculate, bring very large difficulty to bearing type selecting.In order to study the actual loading of rotor bearing, giving one and being suitable for three-phase induction motor axial force measuration method.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, there is provided that a kind of structure is simple, handling ease, easy to operate three-phase induction motor rotor bearing axial force measuring device and measuring method, solve a difficult problem for current rotor bearing axial force testing, for understanding the actual forced status of motor further, evaluate its level of processing and provide strong foundation, for the technical merit improving motor provides strong test evaluation data.
Technical scheme of the present invention is: a kind of three-phase induction motor rotor bearing axial force measuring device, comprise back end cover for motor and machine shaft, motor rear end covers and is distributed with bolt mounting holes, it is characterized in that described three-phase induction motor rotor bearing axial force measuring device covers at motor rear end to be provided with bolt, the force cell being with display instrument, cutting oil and machine shaft; Wherein, motor rear end covers to be provided with installs location ring flat-plate, the placement space of force cell, centre bolt hole, force cell wire fairlead and the pilot hole for force cell; this pilot hole and centre bolt hole concentric, force cell is standard component;
Described force cell is arranged in placement space, and is located by pilot hole, ensures that accurately location installed by force cell.The roundlet head end of force cell withstands on machine shaft right part, and coat enough cutting oils in machine shaft right part, its force cell other end is withstood by bolt, namely bolt is arranged in centre bolt hole to stretch out and withstands the force cell other end, is controlled the pretightning force of force cell by adjusting bolt;
Described back end cover for motor is installed on motor rear end by installation location ring flat-plate and bolt mounting holes.
Described three-phase induction motor rotor bearing axial force measuration method is as follows: first installed by this rotor bearing axial force measuring device, then by the theoretical size first calculating rotor bearing axial force, pass through adjusting bolt, force cell is made to have certain pretightning force, restart motor, when motor normally works, observe the force value change of the display instrument of force cell, if the data deviation theory of the bearing axial force measured calculates too large, then readjust pretightning force, repetition like this, until the requirement of the data fit actual condition of the bearing axial force measured, as data depart from too large, then rethink the type selecting of force cell or consider the problem of motor process and frock.
Force cell in the present invention is installed in placement space, and is located by force cell pilot hole, ensures that accurately location installed by sensor.The little nose circle of force cell withstands on machine shaft right part, and coats enough cutting oils in machine shaft left part, and its other end is withstood by bolt, is controlled the pretightning force of force cell by adjusting bolt.Normally work at motor, observe the force value change of force cell, be the axial force suffered by electric machine operation state lower rotor part bearing.The present invention adopts electric motor end cap must have the bolt hole installed location and the pilot hole of supporting role, the wire guide of drawing signal conductor and the force cell of force cell, and one-piece construction must have enough rigidity, make when force cell is stressed, special electric motor end cap distortion must be enough little, in order to avoid affect the measuring accuracy of force cell, the pretightning force of force cell is given moderate, brings overflow to determine the risk of load to sensor too greatly, and too little precision is inadequate.The measurement range selection of force cell will be selected according to the actual loading situation of bearing, and too large precision is inadequate, and too little meeting causes the risk of damage to sensor.Machine shaft and common electric machine rotating shaft mainly can not have fabrication hole in end, and roughness must higher than 3.2 accuracy requirements.
Present invention process is simple, supplementary structure is produced simple, easy to operate, and solve a difficult problem for current three-dimensional induction electromotor rotor bearing axial force testing, for understanding the actual forced status of motor further, important meaning is had, for the technical merit improving motor provides strong test evaluation data to the analysis of bearing type selecting and the technology of lifting motor entirety.
Accompanying drawing explanation
Fig. 1 is installation of the present invention and theory structure schematic diagram;
Fig. 2 is the main TV structure schematic diagram of back end cover for motor;
Fig. 3 is back end cover for motor A-A sectional structure schematic diagram;
Fig. 4 is back end cover for motor B-B sectional structure schematic diagram;
Fig. 5 is back end cover for motor three-dimensional structure schematic diagram;
Fig. 6 is machine shaft structural representation;
In figure: 1-back end cover for motor, 2-bolt, 3-is with the force cell of display instrument, 4-cutting oil, 5-machine shaft, 6-electric motor end cap erection bolt hole, 7-electric motor end cap installs location-plate, the placement space of 8-force cell, 9-force cell erection bolt hole, 10-force cell pilot hole, 11-force cell wire fairlead, 12-machine shaft right part.
Embodiment
Below in conjunction with concrete drawings and Examples, the present invention is further described.
A kind of three-phase induction motor rotor bearing axial force measuring device, comprise back end cover for motor 1 and machine shaft 5, back end cover for motor 1 is distributed with bolt mounting holes 6, it is characterized in that described three-phase induction motor rotor bearing axial force measuring device is on back end cover for motor 1, be provided with bolt 2, the force cell 3 being with display instrument, cutting oil 4 and machine shaft 5; Wherein, back end cover for motor 1 is provided with installs location ring flat-plate 7, the placement space 8 of force cell, centre bolt hole 9, force cell wire fairlead 11 and the pilot hole 10 for force cell; this pilot hole 10 and centre bolt hole 9 concentric, force cell 3 is standard component;
Described force cell 3 is arranged in placement space 8, and is located by pilot hole 10, ensures that accurately location installed by force cell.The roundlet head end of force cell 3 withstands on machine shaft right part 12, and coat enough cutting oils 4 in machine shaft right part 12, its force cell 3 other end is withstood by bolt 2, namely bolt 2 is arranged in centre bolt hole 9 to stretch out and withstands force cell 3 other end, is controlled the pretightning force of force cell 3 by adjusting bolt 2;
Described back end cover for motor 1 is installed on motor rear end by installation location ring flat-plate 7 and bolt mounting holes 6.
Described three-phase induction motor rotor bearing axial force measuration method is as follows: first installed by this rotor bearing axial force measuring device, then by the theoretical size first calculating rotor bearing axial force, by adjusting bolt 2, force cell 3 is made to have certain pretightning force, restart motor, when motor normally works, observe the force value change of the display instrument of force cell 3, if the data deviation theory of the bearing axial force measured calculates too large, then readjust pretightning force, repetition like this, until the requirement of the data fit actual condition of the bearing axial force measured, as data depart from too large, then rethink the type selecting of force cell or consider the problem of motor process and frock.
Force cell 3 in the present invention is installed in placement space 8, and is located by force cell pilot hole 10, ensures that accurately location installed by sensor.The little nose circle of force cell 3 withstands on machine shaft left part 12, and coat enough cutting oils 4 in machine shaft right part 12, its other end is withstood by bolt 2, and bolt 2 is installed on force cell erection bolt hole 9, is controlled the pretightning force of force cell 3 by adjusting bolt 2.Motor normally works, and observes the force value change of the display instrument 3 of force cell, is the axial force suffered by electric machine operation state lower rotor part bearing.
The electric motor end cap 1 that the present invention adopts must have the bolt hole 9 installed location and the pilot hole 10 of supporting role, the wire guide 11 of drawing signal conductor and the force cell of force cell 3, and one-piece construction must have enough rigidity, make when force cell 3 is stressed, electric motor end cap 1 distortion must be enough little, in order to avoid affect the measuring accuracy of force cell 3, the pretightning force of force cell 3 is given moderate, bring overflow to determine the risk of load to sensor too greatly, too little precision is inadequate.The measurement range selection of force cell 3 will be selected according to the actual loading situation of bearing, and too large precision is inadequate, and too little meeting causes the risk of damage to sensor.
Present invention process is simple, supplementary structure is produced simple, easy to operate, and solves a difficult problem for current three-dimensional induction electromotor rotor bearing axial force testing, for understanding the actual forced status of motor further, there is important meaning to the analysis of bearing type selecting and the technology of lifting motor entirety.
Claims (2)
1. a three-phase induction motor rotor bearing axial force measuring device, comprises back end cover for motor (1) and machine shaft (5), back end cover for motor (1) is distributed with bolt mounting holes (6), it is characterized in that:
A, described three-phase induction motor rotor bearing axial force measuring device are on back end cover for motor (1), be provided with bolt (2), the force cell (3) being with display instrument, cutting oil (4) and machine shaft (5); Wherein, back end cover for motor (1) is provided with installs location ring flat-plate (7), the placement space (8) of force cell, centre bolt hole (9), force cell wire fairlead (11) and the pilot hole (10) for force cell; this pilot hole (10) and centre bolt hole (9) concentric, force cell (3) is standard component;
B, described force cell (3) are arranged in placement space (8), and are located by pilot hole (10), ensure that accurately location installed by force cell; The roundlet head end of force cell (3) withstands on machine shaft right part (12), and coat enough cutting oils (4) in machine shaft right part (12), its force cell (3) other end is withstood by bolt (2), namely bolt (2) is arranged in centre bolt hole (9) to stretch out and withstands force cell (3) other end, is controlled the pretightning force of force cell (3) by adjusting bolt (2);
C, described back end cover for motor (1) are installed on motor rear end by installation location ring flat-plate (7) and bolt mounting holes (6).
2. a three-phase induction motor rotor bearing axial force measuration method, it is characterized in that: described three-phase induction motor rotor bearing axial force measuration method is as follows: first installed by this rotor bearing axial force measuring device, then by the theoretical size first calculating rotor bearing axial force, by adjusting bolt (2), force cell (3) is made to have certain pretightning force, restart motor, when motor normally works, observe the force value change of the display instrument of force cell (3), if the data deviation theory of the bearing axial force measured calculates too large, then readjust pretightning force, repetition like this, until the requirement of the data fit actual condition of the bearing axial force measured, as data depart from too large, then rethink the type selecting of force cell or consider the problem of motor process and frock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410745159.6A CN104483055B (en) | 2014-12-09 | 2014-12-09 | Device and method for measuring axial force of rotor bearing of three-phase induction motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410745159.6A CN104483055B (en) | 2014-12-09 | 2014-12-09 | Device and method for measuring axial force of rotor bearing of three-phase induction motor |
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| CN104483055A true CN104483055A (en) | 2015-04-01 |
| CN104483055B CN104483055B (en) | 2017-01-25 |
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| CN201410745159.6A Active CN104483055B (en) | 2014-12-09 | 2014-12-09 | Device and method for measuring axial force of rotor bearing of three-phase induction motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122291A (en) * | 2016-09-06 | 2016-11-16 | 沃德传动（天津）股份有限公司 | A kind of bearing assembly and the pre-tightening apparatus of bearing |
| CN107576437A (en) * | 2017-09-28 | 2018-01-12 | 中国航发动力股份有限公司 | A kind of gas turbine rotor axial load measurement apparatus |
| CN108534940A (en) * | 2018-05-14 | 2018-09-14 | 西安交通大学 | A kind of measuring device and measuring method of the rotor axial power of double-screw compressor |
Citations (5)
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|---|---|---|---|---|
| US4129036A (en) * | 1977-06-17 | 1978-12-12 | Allis-Chalmers Corporation | Alignment indicator for roller-type support |
| JP2008241626A (en) * | 2007-03-28 | 2008-10-09 | Nsk Ltd | Bearing unit for wheel support with load sensing mechanism |
| CN201548395U (en) * | 2009-09-24 | 2010-08-11 | 浙江天马轴承股份有限公司 | Test principal shaft unit of large-sized bearing test machine |
| CN103196609A (en) * | 2013-03-13 | 2013-07-10 | 洛阳轴研科技股份有限公司 | Axial load testing method of ball bearing |
| CN103884504A (en) * | 2014-03-10 | 2014-06-25 | 西安交通大学 | Axial force bearing test structure of elastic foil dynamic pressure gas thrust bearings |
-
2014
- 2014-12-09 CN CN201410745159.6A patent/CN104483055B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4129036A (en) * | 1977-06-17 | 1978-12-12 | Allis-Chalmers Corporation | Alignment indicator for roller-type support |
| JP2008241626A (en) * | 2007-03-28 | 2008-10-09 | Nsk Ltd | Bearing unit for wheel support with load sensing mechanism |
| CN201548395U (en) * | 2009-09-24 | 2010-08-11 | 浙江天马轴承股份有限公司 | Test principal shaft unit of large-sized bearing test machine |
| CN103196609A (en) * | 2013-03-13 | 2013-07-10 | 洛阳轴研科技股份有限公司 | Axial load testing method of ball bearing |
| CN103884504A (en) * | 2014-03-10 | 2014-06-25 | 西安交通大学 | Axial force bearing test structure of elastic foil dynamic pressure gas thrust bearings |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106122291A (en) * | 2016-09-06 | 2016-11-16 | 沃德传动（天津）股份有限公司 | A kind of bearing assembly and the pre-tightening apparatus of bearing |
| CN107576437A (en) * | 2017-09-28 | 2018-01-12 | 中国航发动力股份有限公司 | A kind of gas turbine rotor axial load measurement apparatus |
| CN108534940A (en) * | 2018-05-14 | 2018-09-14 | 西安交通大学 | A kind of measuring device and measuring method of the rotor axial power of double-screw compressor |
| CN108534940B (en) * | 2018-05-14 | 2020-06-19 | 西安交通大学 | Device and method for measuring axial force of rotor of double-screw compressor |
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| Publication number | Publication date |
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| CN104483055B (en) | 2017-01-25 |
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Effective date of registration: 20170731 Address after: 410145 Hunan province Changsha Changsha County Gaoqiao Zhen Huai Ying Road No. 28 Patentee after: Hunan Tian Neng Motor Manufacturing Co. Ltd Address before: 412000 Hunan Province, Zhuzhou Shifeng District North Gate Tian Xin Liancheng group technology management department Patentee before: Liancheng Group Co., Ltd., Zhuzhou |
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