CN104483055B - 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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- CN104483055B CN104483055B CN201410745159.6A CN201410745159A CN104483055B CN 104483055 B CN104483055 B CN 104483055B CN 201410745159 A CN201410745159 A CN 201410745159A CN 104483055 B CN104483055 B CN 104483055B
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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, it is 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, current to rotor-bearing system actual loading situation
Also do not test accordingly, be to be obtained by preferable Theoretical Calculation at present to the stress of rotor external applied load, but characteristic parameter
Characterize and but differ greatly, such as on bearing life, relatively large with actual difference, the actual loading tool of bearing life and bearing
There are much relations.Journal bearing mainly carries radial force, bears for axial force and requires very little, and is directed to the vertical installation of track
Blower fan, rotor bearing bears a big chunk axial force, but is difficult to calculate the load of reality by Theoretical Calculation, to bearing
Type selecting brings very big difficulty.In order to study the actual loading of rotor bearing, give one kind and be suitable for three-phase induction
Motor axial direction force measuring method.
Content of the invention
It is an object of the invention to overcoming above-mentioned deficiency, provide that a kind of structure is simple, handling ease, easy to operate three-phase
Induction electromotor rotor bearing axial force measuring device and measuring method, solve the difficulty of current rotor bearing axial force testing
Topic, for further appreciating that the actual forced status of motor, evaluates its level of processing and provides strong foundation, for improving motor
Technical merit provides strong test evaluation data.
The technical scheme is that a kind of three-phase induction motor rotor bearing axial force measuring device, after motor
End cap and machine shaft, are distributed with bolt mounting holes on motor rear end lid it is characterised in that described three-phase induction motor rotor
Bearing axial force measuring device be provided with motor rear end lid bolt, the force cell with display instrument, cutting oil and
Machine shaft；Wherein, motor rear end lid be provided with installation positioning ring flat-plate, the placement space of force cell, centre bolt hole,
Force cell wire fairlead and the location hole for force cell, this location hole is concentric with centre bolt hole, dynamometry
Sensor is standard component;
Described force cell is arranged in placement space, and is positioned by location hole it is ensured that essence installed by force cell
Determine position.The roundlet head end of force cell withstands on machine shaft right part, and coats enough in machine shaft right part
Cutting oil, its force cell other end is withstood by bolt, and that is, bolt centrally disposed bolt in the hole is stretched out and withstood dynamometry
The sensor other end, controls the pretightning force of force cell by regulating bolt；
Described back end cover for motor is installed on motor rear end by installing positioning ring flat-plate and bolt mounting holes.
Described three-phase induction motor rotor bearing axial force measuration method is as follows: first by this rotor bearing axially
Force measuring device installs, and then passes through the theoretical size first calculating rotor bearing axial force, by regulating bolt so that
Force cell has certain pretightning force, restarts motor, in motor normal work, observes the display instrument of force cell
Force value change, if the data deviation theory of the bearing axial force measured calculates too big, readjust pretightning force, so heavy
Multiple, the requirement of the data fit actual condition of bearing axial force until measuring, such as data deviate too big, then rethink dynamometry
The type selecting of sensor or the problem considering motor process and frock.
Force cell in the present invention is installed in placement space, and is positioned it is ensured that passing by force cell location hole
Sensor is installed and is accurately positioned.The little nose circle of force cell withstands on machine shaft right part, and applies in machine shaft left part
Upper enough cutting oils, its other end is withstood by bolt, controls the pretightning force of force cell by regulating bolt.?
Motor normal work, observes the force value change of force cell, the as axial force suffered by electric machine operation state lower rotor part bearing.
The present invention must be had the location hole of the positioning to force cell and supporting role, be drawn leading of signal conductor using electric motor end cap
The bolt hole that string holes and force cell are installed, and overall structure must have enough rigidity so that in force cell stress
When, special electric motor end cap deformation has to sufficiently small, in order to avoid affecting the certainty of measurement of force cell, the pretension of force cell
Power is given moderate, brings overflow to determine the risk of load to sensor greatly very much, too little precision is inadequate.The range of force cell
Selection will be selected according to the actual loading situation of bearing, and too big precision is inadequate, the too little risk that sensor can be caused damage.Electricity
Machine rotating shaft and common electric machine rotating shaft mainly can not have fabrication hole in end, and roughness necessarily be greater than 3.2 required precisions.
Present invention process is simple, and supplementary structure produces simply, easy to operate, and solves current three-dimensional induction electromotor rotor
A difficult problem for bearing axial force testing, for further appreciating that the actual forced status of motor, the analysis to bearing type selecting and lifting are electric
The overall technology of machine has important meaning, and the technical merit for improving motor provides strong test evaluation data.
Brief description
Fig. 1 is installation and the theory structure schematic diagram of the present invention；
Fig. 2 is back end cover for motor main structure diagram；
Fig. 3 is back end cover for motor a-a cross section structure diagram；
Fig. 4 is back end cover for motor b-b cross section structure diagram；
Fig. 5 is back end cover for motor three dimensional structure diagram；
Fig. 6 is machine shaft structural representation；
In figure: 1- back end cover for motor, 2- bolt, the force cell with display instrument for the 3-, 4- cutting oil, 5- motor turns
Axle, 6- electric motor end cap installation bolt hole, 7- electric motor end cap installs location-plate, the placement space of 8- force cell, and 9- dynamometry passes
Sensor installation bolt hole, 10- force cell location hole, 11- force cell wire fairlead, 12- machine shaft right part.
Specific embodiment
With reference to concrete drawings and Examples, the present invention is further described.
A kind of three-phase induction motor rotor bearing axial force measuring device, including back end cover for motor 1 and machine shaft 5, electricity
Bolt mounting holes 6 are distributed with machine rear end cap 1 it is characterised in that described three-phase induction motor rotor bearing axial force measuration fills
Put is to be provided with bolt 2, the force cell 3 with display instrument, cutting oil 4 and machine shaft 5 on back end cover for motor 1；Its
In, back end cover for motor 1 is provided with installation positioning ring flat-plate 7, the placement space 8 of force cell, centre bolt hole 9, force-measuring sensing
Device wire fairlead 11 and the location hole 10 for force cell, this location hole 10 is concentric with centre bolt hole 9, and dynamometry passes
Sensor 3 is standard component;
Described force cell 3 is arranged in placement space 8, and is positioned by location hole 10 it is ensured that force cell is pacified
Dress is accurately positioned.The roundlet head end of force cell 3 withstands on machine shaft right part 12, and applies in machine shaft right part 12
Upper enough cutting oils 4, its force cell 3 other end is withstood by bolt 2, that is, in the centrally disposed bolt hole 9 of bolt 2
Stretch out and withstand force cell 3 other end, control the pretightning force of force cell 3 by regulating bolt 2；
Described back end cover for motor 1 passes through to install positioning ring flat-plate 7 and bolt mounting holes 6 are installed on motor rear end.
Described three-phase induction motor rotor bearing axial force measuration method is as follows: first by this rotor bearing axially
Force measuring device installs, and then passes through the theoretical size first calculating rotor bearing axial force, by regulating bolt 2, makes
Obtain force cell 3 and there is certain pretightning force, restart motor, in motor normal work, observe the aobvious of force cell 3
Show the force value change of instrument, if the data deviation theory of the bearing axial force measured calculates too greatly, readjust pretightning force, such as
This repeats, the requirement of the data fit actual condition of bearing axial force until measuring, and such as data deviates too big, then rethink
The type selecting of force cell or the problem considering motor process and frock.
Force cell 3 in the present invention is installed in placement space 8, and is positioned by force cell location hole 10, protects
Card sensor is installed and is accurately positioned.The little nose circle of force cell 3 withstands on machine shaft left part 12, and right in machine shaft
Enough cutting oils 4 are coated in end 12, and its other end is withstood by bolt 2, and bolt 2 is installed on force cell installation bolt
On hole 9, control the pretightning force of force cell 3 by regulating bolt 2.Motor normal work, observes the aobvious of force cell
Show the force value change of instrument 3, the as 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 location hole 10 of the positioning to force cell 3 and supporting role, draw
Go out the bolt hole 9 that the wire guide 11 of signal conductor and force cell are installed, and overall structure must have enough rigidity so that
In force cell 3 stress, electric motor end cap 1 deformation have to sufficiently small, in order to avoid impact force cell 3 certainty of measurement,
The pretightning force of force cell 3 is given moderate, brings overflow to determine the risk of load to sensor greatly very much, too little precision is not
Enough.The measurement range selection of force cell 3 will be selected according to the actual loading situation of bearing, too big precision not, too little can be to biography
Sensor causes the risk damaged.
Present invention process is simple, and supplementary structure produces simply, easy to operate, and solves current three-dimensional induction electromotor rotor
A difficult problem for bearing axial force testing, for further appreciating that the actual forced status of motor, the analysis to bearing type selecting and lifting are electric
The overall technology of machine has important meaning.
Claims (2)
1. a kind of three-phase induction motor rotor bearing axial force measuring device, including back end cover for motor (1) and machine shaft (5),
Bolt mounting holes (6) are distributed with back end cover for motor (1) it is characterised in that:
A, described three-phase induction motor rotor bearing axial force measuring device be provided with back end cover for motor (1) bolt (2),
Force cell with display instrument (3), cutting oil (4) and machine shaft (5)；Wherein, back end cover for motor (1) is provided with
Positioning ring flat-plate (7), the placement space (8) of force cell, centre bolt hole (9), force cell wire fairlead are installed
(11) location hole (10) with for force cell, this location hole (10) is concentric with centre bolt hole (9), force cell
(3) it is standard component；
B, described force cell (3) are arranged in placement space (8), and by location hole (10) positioning it is ensured that force-measuring sensing
Device is installed and is accurately positioned；The roundlet head end of force cell (3) withstands on machine shaft right part (12), and right in machine shaft
Enough cutting oils (4) are coated in end (12), and its force cell (3) other end is withstood by bolt (2), i.e. bolt (2)
Stretch out in centrally disposed bolt hole (9) and withstand force cell (3) other end, to control dynamometry to pass by regulating bolt (2)
The pretightning force of sensor (3)；
C, described back end cover for motor (1) pass through to install positioning ring flat-plate (7) and bolt mounting holes (6) are installed on motor rear end.
2. a kind of measuring method of three-phase induction motor rotor bearing axial force measuring device as claimed in claim 1, it is special
Levy and be that the measuring method of this described three-phase induction motor rotor bearing axial force measuring device is as follows: first by three-phase induction
Rotor bearing axial force measuring device installs, and then passes through the theoretical size first calculating rotor bearing axial force,
Make force cell (3) have certain pretightning force by regulating bolt (2), restart motor, in motor normal work,
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
Greatly, then readjust pretightning force, so repeat, until the requirement of the data fit actual condition of the bearing axial force measured is
Can.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104483055A CN104483055A (en) | 2015-04-01 |
| CN104483055B true CN104483055B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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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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| CN (1) | CN104483055B (en) |
Families Citing this family (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 |
| CN107576437B (en) * | 2017-09-28 | 2020-02-21 | 中国航发动力股份有限公司 | Gas turbine rotor axial load measuring device |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN103196609B (en) * | 2013-03-13 | 2014-11-19 | 洛阳轴研科技股份有限公司 | Axial load testing method of ball bearing |
| CN103884504B (en) * | 2014-03-10 | 2016-06-29 | 西安交通大学 | A kind of aerodynamic compliant foil thrust bearings is by axial force testing structure |
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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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