CN106451860A - Monitoring device for permanent magnet pole of permanent magnet motor and press strip of permanent magnet pole - Google Patents
Monitoring device for permanent magnet pole of permanent magnet motor and press strip of permanent magnet pole Download PDFInfo
- Publication number
- CN106451860A CN106451860A CN201610943147.3A CN201610943147A CN106451860A CN 106451860 A CN106451860 A CN 106451860A CN 201610943147 A CN201610943147 A CN 201610943147A CN 106451860 A CN106451860 A CN 106451860A
- Authority
- CN
- China
- Prior art keywords
- press strip
- magnet steel
- piezoelectric membrane
- monitoring device
- protection coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention includes a monitoring device for a permanent magnet pole of a permanent magnet motor. The permanent magnet pole includes multilayer magnetic steel with same magnetic properties in the axial direction of the wall surface of a magnet yoke and a protective coating layer coating the multilayer magnetic steel; the magnetic steel is tightly fixed on the inner wall of the magnet yoke through a press strip; the monitoring device includes a first detection assembly, a piezoelectric film and a memorizer, wherein the first detection assembly is used for detecting the running state of the protective coating layer during the running process of the permanent magnet pole, the piezoelectric film is arranged between the press strip and the protective coating layer, a temperature-sensing element is encapsulated in the piezoelectric film, and the memorizer is used for detecting the detection signals of the first detection assembly. The monitoring device can detect the running state of the protective coating layer and store related test data, therefore, the fixed state of the magnetic steel can be obtained according to the state of the protective coating layer, and a data support is provided for the fixation of the magnetic steel and the evaluation and improvement of the reliability of the protective coating layer. Moreover, the invention further provides a press strip of the permanent magnet pole.
Description
Technical field
The present invention relates to technical field of motors, more particularly to a kind of monitoring device of magneto permanent magnetism magnetic pole and permanent magnetism
The press strip of magnetic pole.
Background technology
Magneto is to carry out, as medium, the calutron that mechanical energy and electric energy are mutually changed with magnetic field, and which is widely used in
Various generating places.
Refer to Fig. 1 and Fig. 2, Fig. 1 is a kind of generalized section of magneto；Fig. 2 is the office of magneto shown in Fig. 1
Portion's structural representation.
Magneto includes yoke wall 11, press strip 12, magnet steel 13, and yoke 11 is generally cylindrical structure, and magnet steel 13 is by pressure
Bar 12 and bolt 14 are fastened on 11 inwall of yoke；In the schematic structure, the cross section of press strip 12 is trapezoidal, and bolt 14 is from yoke 11
Outside implements radially to fasten to the press strip 12 of 11 inwall of yoke, and 13 liang of magnet steel is pushed down on the inclined-plane for contacting with magnet steel 13 by press strip 12
Side wall.The head of bolt 14 is protected using fluid sealant filling covering with the exposed parts of air contact, on 13 surface of magnet steel
Filling perfusion resin is protected to magnet steel 13 with forming protection coating 15.
Wherein, the tightening state of magnet steel 13 and protection coating 15 state be affect the magneto life-span principal element it
One, in wind energy turbine set running under the radial direction magnetic pull effect of periodicity motor gas-gap, continue of reciprocating vibration to cause magnet steel
The resin that is filled between yoke inwall is mutually peeled off, and is loosened magnet steel, is crushed, comes off, in radial direction magnetic pull when serious
Under effect, magnet steel will tamper protection coating, even into generator amature and stator gap, wear and tear stator, so that stator is failed,
Produce bigger loss.
At present, the tightening state of technological means monitoring magneto permanent magnetism magnetic pole magnet steel and the operation shape of protection coating there is no
State, therefore just cannot fix to magnet steel and protect the reliability of coating to be evaluated and improved, also cannot be according to magnet steel and protection
The running status of the state adjustment magneto of coating, to extend the service life of magneto.
Content of the invention
It is an object of the invention to provide a kind of monitoring device of magneto permanent magnetism magnetic pole, the monitoring device can detect anti-
The running status of shield coating, and by coherent detection data storage such that it is able to the state according to protection coating knows consolidating for magnet steel
Determine state, and fix and protect the reliability evaluation of coating for magnet steel and offer data support is provided.
It is a further object of the present invention to provide a kind of press strip of permanent magnetism magnetic pole, the structure design of the press strip being capable of monitoring protection
The running status of coating.
For solving above-mentioned technical problem, the present invention provides a kind of monitoring device of magneto permanent magnetism magnetic pole, permanent magnetism magnetic pole
Including axially the multilamellar magnet steel of same magnetic and being filled in the protection coating on each layer magnet steel surface along yoke wall；The magnetic
Steel is anchored on the yoke inwall by press strip；The monitoring device includes：
First detection components, for detecting the running status for protecting coating described in permanent magnetism magnetic pole running；Which includes
The piezoelectric membrane being arranged between the press strip and the protection coating, is packaged with temperature-sensing element in the piezoelectric membrane；
Memorizer, for receiving and storing the detection signal of first detection components.
As above, the monitoring device includes the piezoelectric membrane being arranged between press strip and protection coating, and in the piezoelectric membrane
Temperature-sensing element is packaged with, so, piezoelectric membrane can perceive the STRESS VARIATION that protection coating is caused, or press strip on press strip surface
Can be between monitoring protection coating and press strip to the temperature-sensing element of encapsulation in the STRESS VARIATION for protecting coating to cause, piezoelectric membrane
Temperature change, is combined with STRESS VARIATION and can deduce the running status of protection coating, due to protecting coating and press strip, magnet steel
Deng contact, so the stationary state of magnet steel can be known to a certain extent by the state for protecting coating, coherent detection data
It is stored in memorizer, can fixes and protect the reliability evaluation of coating for magnet steel and offer data support is provided.
Optionally, in the piezoelectric membrane, humidity sensing element is also packaged with.
Optionally, the piezoelectric membrane includes the diapire section with the press strip top contact and the magnet steel contacts side surfaces
Side wall sections and with described protection coating contacts flange section.
Optionally, the piezoelectric membrane is PVDF piezoelectric film or alkyd resin piezoelectric membrane.
Optionally, first detection components also include to be embedded in the pressure transducer for protecting inside coating, temperature
Sensor and humidity sensor.
Optionally, first detection components also include that the temperature being arranged between the protection coating and the magnet steel is passed
Sensor.
Optionally, described protection coating be embedded in described protection coating inside pressure transducer, temperature sensor and
Humidity sensor is structure as a whole.
Optionally, the press strip is fastened by bolts in the yoke wall；The monitoring device also includes：
Second detection components, for detecting the concordance of each press strip fastening and permanent magnetism magnetic pole in permanent magnetism magnetic pole forming process
The loosening state of press strip in running；
The memorizer is also received and stores the detection signal of second detection components.
Optionally, second detection components include to be arranged at the pressure transducer of the bolt head and are arranged at institute
State the pressure transducer between press strip and the yoke wall.
Optionally, second detection components also include to be arranged at the pressure of the two sides that the press strip is contacted with the magnet steel
Force transducer.
Optionally, each pressure transducer of second detection components is PVDF piezoelectric film or polyester tree
Fat piezoelectric membrane.
The present invention also provides a kind of press strip of permanent magnetism magnetic pole, and the permanent magnetism magnetic pole is included along the axial same magnetic of yoke wall
The multilamellar magnet steel of property and it is filled in the protection coating on each layer magnet steel surface；The magnet steel is anchored on the magnetic by the press strip
Yoke wall；The press strip is installed with the first piezoelectric membrane with the top surface of the protection coating contacts, in first piezoelectric membrane
It is packaged with temperature-sensing element.
As above, the press strip is installed with the first piezoelectric membrane with the top surface of protection coating contacts, envelope in first piezoelectric membrane
It is the press strip for carrying sensing element equipped with temperature-sensing element, the i.e. press strip, so, after permanent magnetism magnetic pole is assembled by existing mode, takes
Press strip with sensing element can be carried out to the state for protecting coating, magnet steel and press strip etc. in permanent magnetism magnetic pole running
Monitoring, is that magnet steel is fixed and protected the reliability evaluation of coating and improves offer data support；Specifically, first piezoelectric membrane
The STRESS VARIATION that protection coating is caused on press strip surface can be perceived, or press strip is to protecting the STRESS VARIATION that coating is caused, the
The temperature change that in one piezoelectric membrane, the temperature-sensing element of encapsulation can be between monitoring protection coating and press strip, is mutually tied with STRESS VARIATION
The running status that can deduce protection coating is closed, because protection coating is contacted with press strip, magnet steel etc., by protecting coating
State can also know the stationary state of magnet steel to a certain extent.
Optionally, in first piezoelectric membrane, humidity sensing element is also packaged with.
Optionally, the two sides that the press strip is contacted with the magnet steel are installed with the second piezoelectric membrane respectively.
Optionally, the second piezoelectric membrane described in the two of the press strip two sides is arranged in series.
Optionally, the press strip is integrally formed with first piezoelectric membrane, second piezoelectric membrane.
Optionally, first piezoelectric membrane and second piezoelectric membrane are PVDF piezoelectric film or polyester
Resin piezoelectric thin film.
Optionally, the inside of the top surface of the press strip and/or the press strip offers wiring channel.
Optionally, the press strip is the press strip that the little insulant of hygroscopicity is made.
Description of the drawings
Fig. 1 is a kind of generalized section of magneto of the prior art；
Fig. 2 is the partial structural diagram of magneto shown in Fig. 1；
Fig. 3 is that a kind of partial structurtes of specific embodiment that permanent magnetism magnetic pole provided by the present invention carries monitoring device are illustrated
Figure；
Fig. 4 is that the partial structurtes of the another specific embodiment that permanent magnetism magnetic pole provided by the present invention carries monitoring device are illustrated
Figure；
Fig. 5 shows that magnet steel and press strip in embodiments of the invention are fixed on the local arrangement schematic diagram of yoke inwall；
Fig. 6 shows the press strip force analysis schematic diagram of permanent magnetism magnetic pole in embodiments of the invention；
Fig. 7 shows the protection coating of permanent magnetism magnetic pole in embodiments of the invention using the molded signal of vacuum bag pressing mold
Figure.
Description of reference numerals：
Yoke 11, press strip 12, wiring channel 121, magnet steel 13, bolt 14, protects coating 15, vacuum bag 16, reinforcing material
17, flow-guiding screen 18；
Piezoelectric membrane 21, diapire section 211, side wall sections 212, flange section 213；
Pressure transducer 31a, 31b, 31c；
F1 represents the power along the circumferential direction being subject in magnet steel running；
F2 represents that magnet steel circumference braking moment acts on the circumference tangential component of press strip contact surface；
F3 represents that magnet steel radial direction magnetic pull acts on the radial component of press strip contact surface；
F represents the tensile force that press strip is axially subject to along yoke.
Specific embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Refer to Fig. 3, Fig. 3 is that permanent magnetism magnetic pole provided by the present invention carries a kind of partial structural diagram of monitoring device,
It is illustrated as radial direction section view.
Need exist for first, it is emphasized that permanent magnetism magnetic pole involved herein is defined as below：Permanent magnetism magnetic pole is included along magnetic
11 wall of yoke axially the multilamellar magnet steel 13 of same magnetic and is filled in the protection coating 15 on each 13 surface of layer magnet steel.
It is also pointed out that, illustrating so that motor stator is located on the inside of rotor as an example herein, motor stator and motor turn
It is also feasible that setting is exchanged in the position of son.
Show that magnet steel and press strip are fixed on the local arrangement schematic diagram of yoke inwall please also refer to Fig. 5, Fig. 5.
Generally, magnet steel 13 is anchored on 11 inwall of yoke by press strip 12, and press strip 12 is fastened by bolts in 11 inwall of yoke.
Specifically, during assembling, first with bolt, press strip 12 is installed on 11 inwall of yoke, press strip 12 is axially extended, and along yoke 11
The circumference of wall is uniform；The cross section of press strip 12 is generally trapezoidal, in this way, will form dovetail groove knot between adjacent two press strip 12
Structure, some magnet steel 13 of same magnetic are pushed in the oat tail groove structure that adjacent two press strip 12 is formed vertically successively, that is,
Say, the multilamellar magnet steel 13 of same magnetic is fixed between adjacent two press strip 12.
In specific embodiment, the monitoring device includes the first detection components and memorizer；Wherein, the first detection components are main
For detecting the running status for protecting coating 15 in permanent magnetism magnetic pole running, memorizer is used for receiving and storing the first detection group
The detection signal of part.
First detection components specifically include the piezoelectric membrane 21 being arranged between press strip 12 and protection coating 15, and the piezoelectricity is thin
Temperature-sensing element being packaged with film 21, is specifically as follows platinum resistive element.
The piezoelectric membrane 21 for arranging between press strip 12 and protection coating 15 can perceive protection coating 15 on 12 surface of press strip
The STRESS VARIATION for causing, or the STRESS VARIATION that 12 pairs of protection coating 15 of press strip are caused, according to degree and the rule of the STRESS VARIATION
Rule can deduce the running status of protection coating 15, such as protection coating 15 and press strip 12 whether also in contact condition, so as to
Infer the protection situation of the contact with magnet steel 13 of coating 15.
The temperature change that in piezoelectric membrane 21, the temperature-sensing element of encapsulation can be between monitoring protection coating 15 and press strip 12, with
STRESS VARIATION combines and more accurately the state for protecting coating 15 can be judged, such as the changing value of temperature increases, piezoelectricity
The detected value climbing speed of thin film 21 is accelerated, it is believed that damp and hot inflation status occurs in protection coating 15.
Additionally, when protection coating 15 and press strip 12 have been in contactless state, the monitoring of temperature-sensing element can also reflect anti-
Shield coating 15 whether peel off with magnet steel 13, if the temperature rise rate of temperature-sensing element is greatly reduced, it is believed that protect coating 15 with magnetic
Steel 13 is peeled off, and has humid air to enter between the two.
Further, can also coordinate with temperature-sensing element, common monitoring in encapsulation humidity sensing element in piezoelectric membrane 21
Whether water precipitating product or condensate are had between press strip 12 and magnet steel 13, and to therebetween, " breathing phenomenon " is monitored；It is embodied as, machine
Group is in start-up course, and the detection numerical value of humidity sensor reduces quickly, i.e. mass dryness fraction increase quickly, and reflects different reductions
Speed, if there is water precipitating product then can cause to protect the stripping of coating 15 quickly；If protection coating 15 is peeled off with magnet steel 13, shut down
Afterwards, the detection numerical value of humidity sensing element rises very fast.A period of time after unit starting, humidity sensing element is gradually dry,
Tend to be steady, without water lodgment, after start or shutdown, humidity amplitude of variation is relatively small.
Therefore, by the monitoring to STRESS VARIATION, temperature change and humidity change etc., reflection is combined by many physical quantitys
Complicated physicochemical change process between protection coating 15 and press strip 12, magnet steel 13, can grasp permanent magnetism magnetic pole fortune well
The running status of coating 15 is protected during row.
With reference to Fig. 3, in specific scheme, piezoelectric membrane 21 includes diapire section 211 and the magnet steel with 12 top contact of press strip
The side wall sections 212 of 13 contacts side surfaces and the flange section 213 for outwards being turned down by side wall sections 212, flange section 213 is located at protection coating
Between 15 and magnet steel 13.
In this way, detecting element is provided with equivalent to the corner for all contacting with press strip 12, protection coating 15 in magnet steel 13, herein
Piezoelectric membrane 21 be able to detect that the STRESS VARIATION of magnet steel 13 herein.
In magneto operation process, by the magnetic pull effect that radially pulses and the yoke wall of generator unit stator armature
The torque of circumferencial direction, magnet steel 13 becomes play by simple vibration between adjacent two press strip 12, will necessarily be first to magnetic
Steel 13 produces local stress effect with the contact surface of press strip 12, so as to cause the phenomenon of crackle or even local chips, piezoelectric membrane
21 said structure is arranged, it is also possible to take into account the monitoring to 13 state of magnet steel, is changed in conjunction with STRESS VARIATION, temperature change and humidity
Deng judging whether magnet steel 13 loosens, how long fragmentation after loosening, and whether fracture occur in aforementioned corner region.
In specific scheme, piezoelectric membrane 21 can select PVDF piezoelectric film or alkyd resin piezoelectricity thin
Film.
Polyvinylidene fluoride or alkyd resin as a kind of piezoelectricity or pyroelectricity polymer-function material, with flexible,
Light weight, high tenacity, corrosion-resistant the advantages of, the array element of multi-thickness and larger area can be made, in the program, select which
Light and soft and solid detecting element is made, is easy to be attached on the bending of measurand or flexible surface.
Further, since the piezoelectric voltage constant height of polyvinylidene fluoride or alkyd resin, combined with matrix rear to structure
Performance impact very little, the change for mechanical stress or strain has a response extremely fast, and (0.1Hz is to several for Hz-KHz width
GHz), therefore it is more suitable as sensing element.Therefore, in this programme, preferred polyvinylidene fluoride or alkyd resin are thin as piezoelectricity
Film 21.
When being embodied as, first the diapire section 211 of piezoelectric membrane 21 can be installed in the top of press strip 12, and its both sides tool
There is outwardly directed flexible edge, after magnet steel 13 are pushed, recycle firming agent that the flexible edge of both sides is bonded in the side of magnet steel 13
Wall and roof, that is to say, that the flexible edge is side wall sections 212 and the flange section 213 of piezoelectric membrane 21, finally carries out protection again and covers
The molding of layer 15.
In further scheme, for the running status of preferably monitoring protection coating 15, the first detection components also include
It is embedded in pressure transducer, temperature sensor and the humidity sensor for protecting inside coating 15.
Show the protection coating of permanent magnetism magnetic pole using the molded schematic diagram of vacuum bag pressing mold with reference to Fig. 7, Fig. 7.
It is appreciated that before this, press strip 12 and magnet steel 13 have all been anchored on 11 inwall of yoke, as shown in fig. 7, installing true
Empty bag 16 forms the die cavity of filling bonding agent in 11 inwall of yoke, the periphery wall of vacuum bag 16 with 11 inwall of yoke；In the die cavity
Reinforcing material 17, flow-guiding screen 18 and release cloth are arranged in advance, and wherein, the use that reinforcing material 17 is used for increasing protection coating 15 is strong
Degree, flow-guiding screen 18 be used for for fill process bonding agent water conservancy diversion, release cloth in order to after solidifying vacuum bag 16 be convenient in demoulding.
Therefore, in the forming process of protection coating 15, can will be pre- to pressure transducer, temperature sensor and humidity sensor
It is embedded between braid layer, after protection 15 molding of coating, each sensor can be realized to protecting in coating 15 during follow-up operation
The monitoring of each parameter.
Specifically, during monitoring, can be by pre-buried temperature sensor in protection coating 15 with aforementioned encapsulation in piezoelectricity
Temperature-sensing element in thin film 21 combines, as temperature-sensing element is located between protection coating 15 and press strip 12, anti-equivalent to being located at
The layer bottom of shield coating 15, so both combine the thermograde change that can be appreciated that protection coating 15, certainly, in practice also can be anti-
Between shield coating 15 and magnet steel 13, temperature sensor is set again, to combine with pre-buried temperature sensor；If thermograde increases
Plus, illustrating to protect that coating 15 is thickening, the air that accumulates therebetween is increased, and this kind of phenomenon is to be characterized by it after damp and hot expansion
One；Meanwhile, after unit starting, as the air that accumulates increases, it is rapid that when gases are heated, they expand, pressure transducer, humidity sensor
The detected value climbing speed of device can speed.That is, pre-buried temperature sensor in protection coating 15, humidity sensor and pressure
Cooperate between force transducer monitoring, contributes to understanding the damp and hot inflation status of protection coating 15.
In addition, can also reflect whether protection coating 15 is shelled with magnet steel 13 according to pre-buried each sensor in protection coating 15
From information.
Specifically, if protection coating 15 is peeled off with magnet steel 13, then the pressure transducer being embedded in protection coating 15
Meeting decompression, in addition, after protection coating 15 is peeled off, have humid air entrance, that is to say, that also can from the detected value of humidity sensor
Enough reflect, its key character is exactly, after shutdown, the detection numerical value climbing speed of humidity sensor is very fast, for open-type
Wind-driven generator is especially true.
In protection coating 15, pre-buried pressure transducer, temperature sensor and humidity sensor can also be to protecting coating 15
Degree of aging sensed.
Illustrate by taking the operation conditions of the wind power generating set of coastal waters region as an example, initial operating stage (such as in half a year),
After wind energy turbine set region was rained, in protection coating 15, humidity sensor reflection humidity value increases few, the sun shines again after the rain unit
After several days time of operation, humidity reduces (mass dryness fraction increase), while in running, the detection numerical value of temperature sensor rises soon
Speed, the detection change in value of pressure transducer is less, numerical fluctuations are less；As the continuity of run time occurs：Wind energy turbine set
After the rainy day, protection 15 humidity ratio of coating is more than front decline, or is constantly declining, and recovering drying needs unit to continue
The time of operation is lengthening, and illustrates to protect the porous knot that coating 15 is internal aging layering occurs, possesses accumulation humid air or rainwater
Structure, the pore structure of loose structure is increasing, and the humid air of accumulation causes to protect the equivalent thermal resistance of coating 15 increasing, and protection is covered
The temperature sensor thermal response time at 15 layers of bottom of layer is being lengthened, and humidity sensor even becomes closer to saturation (being close to 100%),
Represent the loose structure of protection coating 15 under motor internal action of alternative electric field, the lasting alternation effect of the stress that expands with heat and contract with cold
Under, coating 15, and the effect of formation frost heave at low temperature are deeply protected in accumulation ice dissolution, and pore structure has been formed, and
Through the circumference throughout whole protection coating 15.
In specific scheme, pressure transducer, temperature sensor and the humidity sensor for protecting inside coating 15 is embedded in
Be structure as a whole with protection coating 15, in this way, can avoid because arrange pressure transducer, temperature sensor and humidity sensor and
To the artificial exfoliated state for protecting coating 15 to cause.
More specifically, for ease of arranging, pressure transducer, temperature sensor and humidity sensor can also be with aforementioned classes
Seemingly, by the way of piezoelectric membrane encapsulation temperature-sensing element and humidity sensing element, here is omitted.
It is pointed out that arranged between aforementioned press strip 12 and protection coating 15 is packaged with temperature-sensing element and humidity sensitive
Pressure transducer, temperature sensor and humidity sensor inside the piezoelectric membrane 21 of element and pre-buried protection coating 15 is from two
Individual different angle reflects the situation between the state of protection coating 15 and press strip 12 and magnet steel 13, so, in practice,
Above-mentioned many sensing elements can be combined preferably to know the running status of each associated components in permanent magnetism magnetic pole running.
Refer to the local that Fig. 4, Fig. 4 are the another specific embodiment that permanent magnetism magnetic pole provided by the present invention carries monitoring device
Structural representation.
In specific scheme, the monitoring device also includes the second detection components, for detecting in permanent magnetism magnetic pole forming process
The loosening state of press strip in the concordance of each press strip fastening and permanent magnetism magnetic pole running.
Certainly, aforementioned memory can also be received and store the detection signal of second detection components.
Press strip 12 is by the fastening of bolt 14 and 11 inwall of yoke, and the tightness of press strip 12 and 11 inwall of yoke is to follow-up magnetic
Whether steel 13 can be pushed between adjacent two press strip 12 has impact, and the running status of magnet steel during follow-up operation 13 is produced
Raw impact.
It is embodied in, if the fastening force of bolt 14 is excessive, when pushing magnet steel 13, resistance is larger, it is most likely that can be in dress
Timing will magnet steel 13 cause to damage, if the fastening force of bolt 14 is less than normal, although generation impact will not be pushed on magnet steel 13, but
Be assembling after be easily caused the play between press strip 12 of magnet steel 13, in running, because of play, associated components will necessarily be made
Become to damage.
In the program, the second detection components include to be arranged at the pressure transducer 31a of 14 head of bolt and are arranged at pressure
Pressure transducer 31b between bar 12 and 11 inwall of yoke.
Specifically, for ease of arranging and measuring, pressure transducer 31a also can select foregoing polyvinylidene fluoride biography
Sense material, relies on bolt 14 to export the pressure change that pressure transducer 31a is formed as feature when occurring to loosen.
In running, if bolt 14 loosens, acted on by radial direction magnetic pull, bolt 14 will certainly be radially to protection
The direction play of coating 15, so as to support protection coating 15, to protecting coating 15 to impact, so, by pressure transducer
The detection value changes of 31a will appreciate that the loosening situation of bolt 14 in running, so as to grasp the loosening state of press strip 12, with
When also can to protect coating 15 situation give to refer to.
14 fastening press strip of bolt when pressure transducer 31b between press strip 12 and 11 inwall of yoke can detect assembling
12 tightness such that it is able to guarantee the concordance that each press strip 12 is fastened, and then guarantee the concordance of the assembling of magnet steel 13.
In addition, pressure transducer 31b can also detect the loosening state of press strip 12 in running, then to magnet steel 13
Running status has certain understanding.
On this basis, the second detection components also include that the pressure for being arranged at the two sides that press strip 12 is contacted with magnet steel 13 is passed
Sensor 31c.
Pressure transducer 31c can measure the compressive stress variable condition of press strip 12 and the contact surface of magnet steel 13, according to this
The contact condition that compressive stress change can reflect between press strip 12 and magnet steel 13, so as to know whether magnet steel 13 has been shaken by simple
Move and become play, and whether crack even fragmentation；It is appreciated that the running status of magnet steel 13 not merely dependence pressure biography
Sensor 31c, the pressure transducer 31a that can also arrange with 14 head of aforementioned bolt, and the pressure between protection coating 15 and press strip 12
21 grade detecting element of conductive film be combined with each other judgement.
Specifically, for ease of arranging and measuring, pressure transducer 31c equally can select foregoing polyvinylidene fluoride
Sensing material.
Additionally, the present invention also provides a kind of press strip of permanent magnetism magnetic pole, wherein, permanent magnetism magnetic pole is included along yoke wall axial direction
The multilamellar magnet steel of same magnetic and it is filled in the protection coating on each layer magnet steel surface；Magnet steel is anchored on yoke wall by press strip
Face.
Please also refer to Fig. 3 and Fig. 4, in specific embodiment, the cross section of the press strip 12 is trapezoidal, wherein press strip 12 with anti-
The top surface of the shield contact of coating 15 is installed with the first piezoelectric membrane, that is to say, that fix the piezoelectric membrane 21 of aforementioned monitoring device
In the top surface of press strip 12, i.e. this press strip 12 for carrying the press strip of sensing element.
Specifically, temperature-sensing element being packaged with the piezoelectric membrane 21, also can encapsulate humidity sensing element further.
It is pointed out that as press strip 12 carries temperature-sensing element, so press strip 12 can adopt hygroscopicity little in practice
Insulant make, that is to say, that, it is desirable to press strip 12 itself is insensitive to temperature change, in order to avoid the survey of impact temperature-sensing element
Amount.
So, permanent magnetism magnetic pole still can be assembled according to existing mode, and after assembling, the press strip 12 for carrying sensing element can
In permanent magnetism magnetic pole running, the state for protecting coating 15, magnet steel 13 and press strip 12 etc. is monitored, according to encapsulation thoughts
How warm element, the piezoelectric membrane 21 of humidity sensing element specifically react the state of protection coating 15, magnet steel 13 and press strip 12 etc.,
Can refer to and understand above, here is omitted.
In addition, on this basis, can also be in fixed second piezoelectric membrane of the two sides of press strip 12 difference, press strip 12 here
Side refer to trapezoidal inclined plane, namely the side for contacting with magnet steel 13.It is appreciated that the second piezoelectric membrane is effectively equivalent to herein
The pressure transducer 31c of aforementioned monitoring device, the contact stress that second piezoelectric membrane can be to press strip 12 with magnet steel 13 is carried out
Sensing, provides reference frame so as to the running status for understanding magnet steel 13.
Specifically, the first piezoelectric membrane that press strip 12 is carried and the second piezoelectric membrane all can select polyvinylidene fluoride piezoelectricity
Thin film or alkyd resin piezoelectric membrane, press strip 12 can be integrally formed with the first piezoelectric membrane, the second piezoelectric membrane.
By taking PVDF piezoelectric film as an example, PVDF piezoelectric film measuring strain, make use of poly- inclined two
The principle of fluoroethylene film transversely deforming output charge, as the electric capacity of PVDF piezoelectric film is less, when by external force
During effect, produced electric charge is difficult to keep for a long time, therefore the dynamic monitoring for structure preferably.In concrete setting, can
So that the second piezoelectric membrane of 12 two sides of press strip to be arranged in series, to increase output.
Additionally, the top surface of press strip 12 and/or inside offer wiring channel 121, the wiring channel 121 is taken for press strip 12
The lead arrangement of each sensing element of band, certainly, as needed also can be used as the cable tray of other monitoring elements.
As above, be integrated fixed with press strip 12 for related transducer element, in actual monitoring, the reflection of each sensing element be
The stress situation of change of press strip 12, but the relation according to active force and counteracting force, can be known accordingly and be contacted with press strip 12
The stressing conditions of opposed parts.
Please also refer to Fig. 5 and Fig. 6, wherein, Fig. 6 shows that the force analysis of the press strip of permanent magnetism magnetic pole is illustrated.
As shown in figure 5, illustrating by taking one block of magnet steel 13 that corner is marked with 1234 numbers as an example, magnet steel 13 is in running
It is subject to power f1 along the circumferential direction, the corner of 13 lower floor of magnet steel is illustrated as a example by being marked with the magnet steel 13 of 5678 numbers, magnet steel 13
In running, also it is subject to the periodicity of radial direction magnetic pull to act on,⊙ represents the change in radial direction magnetic pull direction, Ye Jixiang
Outer or inside arrow is pointed to and represents cyclically-varying.
As magnet steel 13 is squeezed between two press strips 12, so by the analysis to 12 stressing conditions of press strip, can know
The stressing conditions of magnet steel 13.
As shown in fig. 6, with illustrated orientation, the lower surface of press strip 12 is its contact surface with yoke 11, the upper table of press strip 12
Face is its contact surface with magnet steel 13.In figure, F represents the tensile force that press strip 12 is axially subject to along yoke 11, and f2 represents magnet steel 13
Circumferential braking moment acts on the circumference tangential component of 12 contact surface of press strip, and f3 represents that 13 radial direction magnetic pull of magnet steel acts on press strip
The radial component of 12 contact surfaces.
Interaction between magnet steel 13 and armature, to magnet steel 13 except the tangential force (tangential force for producing circumferentially
And form torque) outside, while by the magnetic pull of motor radial pulsation, press strip 12 is stretched effect in itself, magnet steel 13 with
Interaction force between armature is subject to press strip 12 to contact prevention and the balance of end face.Additionally, rotor is a thin cylinder, plus
Work manufacture and alignment error, bearing wear, rotor bow etc. cause rotor with respect to stator bias, can also produce single-edge magnetic drawing
Power, all can indirect action in press strip 12, so the operation of permanent magnetism magnetic pole can be best understood from by the load-bearing monitor of press strip 12
State.
Monitoring device above to magneto permanent magnetism magnetic pole provided by the present invention and the press strip of permanent magnetism magnetic pole are all carried out
It is discussed in detail.Specific case used herein is set forth to the principle of the present invention and embodiment, above example
Explanation be only intended to help and understand the method for the present invention and its core concept.It should be pointed out that for the common of the art
For technical staff, under the premise without departing from the principles of the invention, some improvement can also be carried out to the present invention and are modified, these
Improve and modification is also fallen in the protection domain of the claims in the present invention.
Claims (19)
1. the monitoring device of magneto permanent magnetism magnetic pole, permanent magnetism magnetic pole includes the multilamellar magnetic along the axial same magnetic of yoke wall
Steel and it is filled in the protection coating on each layer magnet steel surface；The magnet steel is anchored on the yoke inwall by press strip；Its feature
It is, the monitoring device includes：
First detection components, for detecting the running status for protecting coating described in permanent magnetism magnetic pole running；Which includes to arrange
Piezoelectric membrane between the press strip and the protection coating, is packaged with temperature-sensing element in the piezoelectric membrane；
Memorizer, for receiving and storing the detection signal of first detection components.
2. monitoring device according to claim 1, it is characterised in that is also packaged with humidity sensitive unit in the piezoelectric membrane
Part.
3. monitoring device according to claim 2, it is characterised in that the piezoelectric membrane includes to connect with the press strip top
The side wall sections and the flange section with the protection coating contacts of tactile diapire section and the magnet steel contacts side surfaces.
4. the monitoring device according to any one of claim 1-3, it is characterised in that the piezoelectric membrane is for gathering inclined difluoro second
Alkene piezoelectric membrane or alkyd resin piezoelectric membrane.
5. monitoring device according to claim 1, it is characterised in that first detection components also include to be embedded in described
Pressure transducer, temperature sensor and humidity sensor inside protection coating.
6. monitoring device according to claim 5, it is characterised in that first detection components also include to be arranged on described
Temperature sensor between protection coating and the magnet steel.
7. monitoring device according to claim 5, it is characterised in that the protection coating be embedded in the protection coating
The pressure transducer of inside, temperature sensor and humidity sensor are structure as a whole.
8. monitoring device according to claim 1, it is characterised in that the press strip is fastened by bolts in the yoke wall
Face；The monitoring device also includes：
Second detection components, for detecting the concordance of each press strip fastening and permanent magnetism magnetic pole operation in permanent magnetism magnetic pole forming process
During press strip loosening state；
The memorizer is also received and stores the detection signal of second detection components.
9. monitoring device according to claim 8, it is characterised in that second detection components include to be arranged at the spiral shell
The pressure transducer of bolt head and the pressure transducer being arranged between the press strip and the yoke wall.
10. monitoring device according to claim 9, it is characterised in that second detection components also include to be arranged at institute
The pressure transducer of the two sides that press strip is contacted is stated with the magnet steel.
11. monitoring devices according to claim 8 or claim 9, it is characterised in that each pressure sensing of second detection components
Device is PVDF piezoelectric film or alkyd resin piezoelectric membrane.
The press strip of 12. permanent magnetism magnetic poles, the permanent magnetism magnetic pole include along yoke wall axially the multilamellar magnet steel of same magnetic and
It is filled in the protection coating on each layer magnet steel surface；The magnet steel is anchored on the yoke wall by the press strip；Its feature exists
In the press strip is installed with the first piezoelectric membrane with the top surface of the protection coating contacts, encapsulation in first piezoelectric membrane
There is temperature-sensing element.
13. press strips according to claim 12, it is characterised in that be also packaged with humidity sensitive in first piezoelectric membrane
Element.
14. press strips according to claim 12, it is characterised in that the two sides that the press strip is contacted with the magnet steel are respectively
It is installed with the second piezoelectric membrane.
15. press strips according to claim 14, it is characterised in that the second piezoelectric membrane described in the two of the press strip two sides
It is arranged in series.
16. press strips according to claim 14, it is characterised in that the press strip and first piezoelectric membrane, described
Two piezoelectric membranes are integrally formed.
17. press strips according to claim 14, it is characterised in that first piezoelectric membrane and second piezoelectric membrane
For PVDF piezoelectric film or alkyd resin piezoelectric membrane.
18. press strips according to any one of claim 12-17, it is characterised in that the top surface of the press strip and/or the pressure
The inside of bar offers wiring channel.
19. press strips according to any one of claim 12-17, it is characterised in that the press strip is the little insulation of hygroscopicity
The press strip that material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610943147.3A CN106451860B (en) | 2016-10-31 | 2016-10-31 | The monitoring device of magneto permanent magnetism magnetic pole and the press strip of permanent magnetism magnetic pole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610943147.3A CN106451860B (en) | 2016-10-31 | 2016-10-31 | The monitoring device of magneto permanent magnetism magnetic pole and the press strip of permanent magnetism magnetic pole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106451860A true CN106451860A (en) | 2017-02-22 |
| CN106451860B CN106451860B (en) | 2018-01-26 |
Family
ID=58177441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610943147.3A Active CN106451860B (en) | 2016-10-31 | 2016-10-31 | The monitoring device of magneto permanent magnetism magnetic pole and the press strip of permanent magnetism magnetic pole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106451860B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294240A (en) * | 2017-07-06 | 2017-10-24 | 欣达重工股份有限公司 | A kind of mutual buckle type field structure and its fixing means |
| CN109698586A (en) * | 2017-10-20 | 2019-04-30 | 发那科株式会社 | Electronic device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096044A (en) * | 2010-12-13 | 2011-06-15 | 重庆长安汽车股份有限公司 | Method for measuring temperature of permanent-magnet synchronous motor of hybrid electric vehicle |
| CN104158375A (en) * | 2014-08-21 | 2014-11-19 | 江西工埠机械有限责任公司 | Super-low-speed high-torque motor and crane with motor |
| CN104325657A (en) * | 2014-08-27 | 2015-02-04 | 新疆金风科技股份有限公司 | Vacuum assistant resin casted protection coating, system and method of permanent magnet motor rotor |
| CN105406629A (en) * | 2015-12-14 | 2016-03-16 | 新疆金风科技股份有限公司 | Motor stator and permanent magnet generator |
| CN206099567U (en) * | 2016-10-31 | 2017-04-12 | 北京金风科创风电设备有限公司 | Monitoring devices of permanent -magnet machine permanent magnetism magnetic pole and layering of permanent magnetism magnetic pole |
-
2016
- 2016-10-31 CN CN201610943147.3A patent/CN106451860B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096044A (en) * | 2010-12-13 | 2011-06-15 | 重庆长安汽车股份有限公司 | Method for measuring temperature of permanent-magnet synchronous motor of hybrid electric vehicle |
| CN104158375A (en) * | 2014-08-21 | 2014-11-19 | 江西工埠机械有限责任公司 | Super-low-speed high-torque motor and crane with motor |
| CN104325657A (en) * | 2014-08-27 | 2015-02-04 | 新疆金风科技股份有限公司 | Vacuum assistant resin casted protection coating, system and method of permanent magnet motor rotor |
| CN105406629A (en) * | 2015-12-14 | 2016-03-16 | 新疆金风科技股份有限公司 | Motor stator and permanent magnet generator |
| CN206099567U (en) * | 2016-10-31 | 2017-04-12 | 北京金风科创风电设备有限公司 | Monitoring devices of permanent -magnet machine permanent magnetism magnetic pole and layering of permanent magnetism magnetic pole |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294240A (en) * | 2017-07-06 | 2017-10-24 | 欣达重工股份有限公司 | A kind of mutual buckle type field structure and its fixing means |
| CN109698586A (en) * | 2017-10-20 | 2019-04-30 | 发那科株式会社 | Electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106451860B (en) | 2018-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206099567U (en) | Monitoring devices of permanent -magnet machine permanent magnetism magnetic pole and layering of permanent magnetism magnetic pole | |
| CN106451860B (en) | The monitoring device of magneto permanent magnetism magnetic pole and the press strip of permanent magnetism magnetic pole | |
| JP2866862B2 (en) | Method and apparatus for monitoring turbine blade vibration | |
| CN101101320B (en) | Multifunction sensor system for electrical machines | |
| EP1748185B1 (en) | Icing detection system for a wind turbine | |
| US8286494B2 (en) | Monitoring of blade frequencies of a wind turbine | |
| US20070041834A1 (en) | Device For Detecting Damage Of A Wind Energy Turbine Rotor Blade Due To A Lightning Strike | |
| CN105003358B (en) | Mounting method of embedded miniature stress sensor for solid rocket engine | |
| US20080282811A1 (en) | Monitoring Device for Sensing the Rotation Speed and the Torque in a Shaft | |
| CN106289034B (en) | A kind of low-power consumption vibration wire sensor and its excitation detection method | |
| CN103998775A (en) | Method for determining mechanical damage to a rotor blade of a wind turbine | |
| CN102418658A (en) | Method of and device for determining a mass condition of a rotor of a wind turbine, and method of operating a wind turbine | |
| US20110215750A1 (en) | Vibration Monitoring of a Magnetic Element in an Electrical Machine | |
| CN108999758B (en) | Blade icing monitoring method and device for wind driven generator | |
| CN104265477A (en) | Method for determining whether air inlet pressure sensor of supercharged diesel engine is abnormal or not and diagnosing faults | |
| US20140020483A1 (en) | Measurement device and method for generator | |
| US10465661B2 (en) | Method for monitoring the vibrational state of a wind turbine | |
| CA2899106A1 (en) | Method for identifying pole slip | |
| CN106796150A (en) | Method for running the plant equipment with shafting | |
| KR20160057437A (en) | Method for the monitoring of a degree of coking at seals by a gas generator shaft | |
| CN115380160A (en) | Frequency content based monitoring of wind turbine blade pitch systems | |
| US8342010B2 (en) | Surge precursor protection systems and methods | |
| CN114810504B (en) | Blade state monitoring method and device, storage medium and wind driven generator | |
| CN105121738B (en) | Industrial roll with triggering system for sensors for operational parameters | |
| CN111928891A (en) | Large-span line vibration monitoring device and monitoring method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |