CN106451860B - The monitoring device of magneto permanent magnetism magnetic pole and the press strip of permanent magnetism magnetic pole - Google Patents
The monitoring device of magneto permanent magnetism magnetic pole and the press strip of permanent magnetism magnetic pole Download PDFInfo
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- CN106451860B CN106451860B CN201610943147.3A CN201610943147A CN106451860B CN 106451860 B CN106451860 B CN 106451860B CN 201610943147 A CN201610943147 A CN 201610943147A CN 106451860 B CN106451860 B CN 106451860B
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- magnet steel
- piezoelectric membrane
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- 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
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- 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
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- Power Engineering (AREA)
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- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a kind of monitoring device of magneto permanent magnetism magnetic pole, permanent magnetism magnetic pole includes axially the multilayer magnet steel of same magnetic and being filled in the protection coating on each layer magnet steel surface along yoke wall；The magnet steel is anchored on the yoke inwall by press strip；The monitoring device includes：First detection components, the running status of coating is protected described in permanent magnetism magnetic pole running for detecting；It includes the piezoelectric membrane being arranged between the press strip and the protection coating, is packaged with temperature-sensing element in the piezoelectric membrane；Memory, for receiving and storing the detection signal of first detection components.The monitoring device can detect the running status of protection coating, and by coherent detection data storage, so as to know the stationary state of magnet steel according to the state of protection coating, and fix and protect the reliability evaluation of coating and improvement to provide data and support for magnet steel.In addition, present invention also offers a kind of press strip of permanent magnetism magnetic pole.
Description
Technical field
The present invention relates to technical field of motors, more particularly to a kind of monitoring device and permanent magnetism of magneto permanent magnetism magnetic pole
The press strip of magnetic pole.
Background technology
Magneto is to carry out the calutron that mechanical energy and electric energy mutually change by medium of magnetic field, and it is widely used in
Various generating places.
Fig. 1 and Fig. 2 are refer to, Fig. 1 is a kind of diagrammatic cross-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 the inwall of yoke 11；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 the inwall of yoke 11, and 13 liang of magnet steel is pushed down with the inclined-plane that magnet steel 13 contacts by press strip 12
Side wall.The head of bolt 14 and the exposed parts of air contact are protected using fluid sealant filling covering, on the surface of magnet steel 13
Filling perfusion resin is protected with forming protection coating 15 to magnet steel 13.
Wherein, the tightening state of magnet steel 13 and protect coating 15 state be influence the magneto life-span principal element it
One, it is persistently of reciprocating vibration to cause magnet steel in wind power plant running under the radial direction magnetic pull effect of periodicity motor gas-gap
The resin filled between yoke inwall is mutually peeled off, and loosens magnet steel, is crushed, is come off when serious, in radial direction magnetic pull
Under effect, magnet steel will tamper protection coating, even into generator amature and stator gap, wear stator, stator is failed,
Produce bigger loss.
At present, it there is no the tightening state of technological means monitoring magneto permanent magnetism magnetic pole magnet steel and protect the operation shape of coating
State, therefore just can not fix and protect the reliability of coating to be evaluated and improved to magnet steel, also can not be according to magnet steel and protection
The running status of the state adjustment magneto of coating, to extend the service life of magneto.
The 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 coating is protected, and by coherent detection data storage, so as to know consolidating for magnet steel according to the state of protection coating
Determine state, and fix and protect the reliability evaluation of coating and improvement to provide data support for magnet steel.
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.
In order to solve the above technical problems, the present invention provides a kind of monitoring device of magneto permanent magnetism magnetic pole, permanent magnetism magnetic pole
Including axially the multilayer 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, the running status of coating is protected described in permanent magnetism magnetic pole running for detecting；It includes
The press strip and the piezoelectric membrane protected between coating are arranged at, is packaged with temperature-sensing element in the piezoelectric membrane；
Memory, for receiving and storing the detection signal of first detection components.
As above, the monitoring device includes the piezoelectric membrane for being arranged on press strip and protecting between coating, and in the piezoelectric membrane
Temperature-sensing element is packaged with, so, piezoelectric membrane can perceive protection coating stress variation caused by press strip surface, or press strip
The stress variation to caused by protection coating, the temperature-sensing element of the interior encapsulation of piezoelectric membrane can be between monitoring protection coating and press strip
Temperature change, the running status for protecting coating can be deduced by being combined with stress variation, due to protection coating and press strip, magnet steel
Deng contact, so by protecting the state of coating to know the stationary state of magnet steel, coherent detection data to a certain extent
It is stored in memory, can fixes and protect the reliability evaluation of coating and improvement to provide data support for magnet steel.
Optionally, also it is packaged with humidity sensing element in the piezoelectric membrane.
Optionally, the piezoelectric membrane includes and the bottom wall section of the press strip top contact and the magnet steel contacts side surfaces
Side wall sections and with it is 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 being embedded in the pressure sensor protected inside coating, temperature
Sensor and humidity sensor.
Optionally, the temperature that first detection components also include being arranged between the protection coating and the magnet steel passes
Sensor.
Optionally, it is described protection coating and be embedded in it is described protection coating inside pressure sensor, 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 uniformity and permanent magnetism magnetic pole of each press strip fastening in permanent magnetism magnetic pole forming process
The loosening state of press strip in running；
The memory also receives and stores the detection signal of second detection components.
Optionally, second detection components include being arranged at the pressure sensor of the bolt head and are arranged at institute
State the pressure sensor between press strip and the yoke wall.
Optionally, second detection components also include the pressure for being arranged at the two sides that the press strip contacts with the magnet steel
Force snesor.
Optionally, each pressure sensor 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 multilayer magnet steel of property and the protection coating for being filled in each layer magnet steel surface；The magnet steel is anchored on the magnetic by the press strip
Yoke wall；The top surface of the press strip and the protection coating contacts is installed with the first piezoelectric membrane, in first piezoelectric membrane
It is packaged with temperature-sensing element.
As above, the top surface of the press strip and protection coating contacts is installed with the first piezoelectric membrane, is sealed in first piezoelectric membrane
Equipped with temperature-sensing element, i.e. the press strip is the press strip for carrying sensing element, so, after permanent magnetism magnetic pole is by existing way assembling, is taken
Press strip with sensing element can be carried out in permanent magnetism magnetic pole running to the state of protection coating, magnet steel and press strip etc.
Monitoring, fix and protect the reliability evaluation of coating and improvement to provide data support for magnet steel；Specifically, first piezoelectric membrane
Protection coating stress variation caused by press strip surface, or press strip stress variation to caused by protection coating can be perceived, the
The temperature change that the temperature-sensing element of encapsulation can be between monitoring protection coating and press strip in one piezoelectric membrane, is mutually tied with stress variation
The running status of protection coating can be deduced by closing, because protection coating and press strip, magnet steel etc. contact, by protecting coating
State can also know the stationary state of magnet steel to a certain extent.
Optionally, also it is packaged with humidity sensing element in first piezoelectric membrane.
Optionally, the two sides that the press strip contacts with the magnet steel are installed with the second piezoelectric membrane respectively.
Optionally, the two of the press strip two sides second piezoelectric membranes are 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 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 press strip made of the small insulating materials of hygroscopicity.
Brief description of the drawings
Fig. 1 is a kind of diagrammatic cross-section of magneto of the prior art；
Fig. 2 is the partial structural diagram of magneto shown in Fig. 1；
Fig. 3 is a kind of partial structurtes signal for specific embodiment that permanent magnetism magnetic pole provided by the present invention carries monitoring device
Figure；
Fig. 4 is the partial structurtes signal for the another specific embodiment that permanent magnetism magnetic pole provided by the present invention carries monitoring device
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 that the protection coating of permanent magnetism magnetic pole in embodiments of the invention presses molded signal using vacuum bag
Figure.
Description of reference numerals：
Yoke 11, press strip 12, wiring channel 121, magnet steel 13, bolt 14, protect coating 15, vacuum bag 16, reinforcing material
17, flow-guiding screen 18；
Piezoelectric membrane 21, bottom wall section 211, side wall sections 212, flange section 213；
Pressure sensor 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.
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.
Fig. 3 is refer to, 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 involved permanent magnetism magnetic pole is defined as below herein：Permanent magnetism magnetic pole is included along magnetic
The wall of yoke 11 axially the multilayer magnet steel 13 of same magnetic and is filled in the protection coating 15 on each surface of layer magnet steel 13.
It is also pointed out that illustrating herein so that motor stator is located on the inside of rotor as an example, motor stator and motor turn
It is also feasible that setting is exchanged in the position of son.
Please also refer to Fig. 5, Fig. 5 shows that magnet steel and press strip are fixed on the local arrangement schematic diagram of yoke inwall.
Generally, magnet steel 13 is anchored on the inwall of yoke 11 by press strip 12, and press strip 12 is fastened by bolts in the inwall of yoke 11.
Specifically, during assembling, press strip 12 is first installed on the inwall of yoke 11 with bolt, press strip 12 axially extends, 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 into successively vertically in the oat tail groove structure that adjacent two press strip 12 formed, that is,
Say, the multilayer magnet steel 13 of same magnetic is fixed between two adjacent press strips 12.
In specific embodiment, the monitoring device includes the first detection components and memory；Wherein, the first detection components are main
The running status of coating 15 is protected in permanent magnetism magnetic pole running for detecting, memory is used to receive and store the first detection group
The detection signal of part.
First detection components specifically include the piezoelectric membrane 21 for being arranged on press strip 12 and protecting between coating 15, and the piezoelectricity is thin
Temperature-sensing element is packaged with film 21, is specifically as follows platinum resistive element.
The piezoelectric membrane 21 set between press strip 12 and protection coating 15 can perceive protection coating 15 on the surface of press strip 12
Caused by stress variation, or press strip 12 to protection coating 15 caused by stress variation, according to the degree of the stress variation and rule
Whether the running status of protection coating 15 can be deduced by restraining, such as protect coating 15 with press strip 12 also in contact condition, so that
Infer contact situation of the protection coating 15 with magnet steel 13.
The temperature change that the temperature-sensing element of encapsulation can be between monitoring protection coating 15 and press strip 12 in piezoelectric membrane 21, with
Stress variation, which is combined, more accurately to be judged the state for protecting coating 15, such as the changing value increase of temperature, piezoelectricity
The detected value climbing speed of film 21 is accelerated, it is believed that damp and hot inflation status occurs in protection coating 15.
In addition, when protection coating 15 and press strip 12 are in contactless state, the monitoring of temperature-sensing element can also reflect anti-
Shield coating 15 whether peeled 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 entrance between the two.
Further, humidity sensing element can also be encapsulated in piezoelectric membrane 21, is coordinated with temperature-sensing element, common monitoring
Whether there are water deposition or condensate between press strip 12 and magnet steel 13, " breathing phenomenon " therebetween is monitored；It is embodied as, machine
In start-up course, the detection numerical value of humidity sensor reduces quickly group, i.e. mass dryness fraction increase quickly, and reflects different reductions
Speed, if there is water deposition then to cause the stripping for protecting 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, humidity sensing element are gradually dried after unit starting,
Tend to be steady, there is no water lodgment, humidity amplitude of variation is relatively small after start or shutdown.
Therefore by the monitoring to stress variation, temperature change and humidity change etc., reflection is combined by more physical quantitys
The complicated physicochemical change process protected between coating 15 and press strip 12, magnet steel 13, permanent magnetism magnetic pole fortune can be grasped well
The running status of coating 15 is protected during row.
With reference to figure 3, in specific scheme, piezoelectric membrane 21 includes the bottom wall section 211 and magnet steel with the top contact of press strip 12
The side wall sections 212 of 13 contacts side surfaces and the flange section 213 outwards turned down by side wall sections 212, flange section 213 is positioned at protection coating
Between 15 and magnet steel 13.
In this way, detecting element is provided with the corner that press strip 12, protection coating 15 contact equivalent 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, the magnetic pull radially pulsed effect and yoke wall by generator unit stator armature
The torque of circumferencial direction, magnet steel 13 become play between adjacent two press strip 12 by simple vibration, will necessarily be first to magnetic
The contact surface of steel 13 and press strip 12 produces local stress effect, so as to cause the crackle even phenomenon of local chips, piezoelectric membrane
21 said structure is set, and can also take into account the monitoring to the state of magnet steel 13, is changed with reference to stress variation, temperature change and humidity
Deng judging whether magnet steel 13 loosens, after loosening how long fragmentation, 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, have it is flexible,
Light, high tenacity, it is corrosion-resistant the advantages that, multi-thickness and the array element of larger area can be made, in the program, from it
Light and soft and solid detecting element is made, is easy to be attached in the bending or flexible surface of measurand.
Further, since the piezoelectric voltage constant of polyvinylidene fluoride or alkyd resin is high, to structure after being combined with matrix
Performance impact very little, for mechanical stress or strain change with response extremely fast, Hz-KHz is wide, and (0.1Hz is to several
GHz), therefore it is more suitable as sensing element.Therefore, preferred polyvinylidene fluoride or alkyd resin are thin as piezoelectricity in this programme
Film 21.
When it is implemented, the bottom wall section 211 of piezoelectric membrane 21 first can be installed in the top of press strip 12, and its both sides has
There is outwardly directed flexible edge, after magnet steel 13 are pushed into, recycle curing 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 the side wall sections 212 and flange section 213 of piezoelectric membrane 21, finally carries out protection again and covers
The shaping of layer 15.
In further scheme, for the running status of preferably monitoring protection coating 15, the first detection components also include
Pressure sensor, temperature sensor and the humidity sensor being embedded in inside protection coating 15.
With reference to Fig. 7, Fig. 7 shows that the protection coating of permanent magnetism magnetic pole presses molded schematic diagram using vacuum bag.
It is appreciated that before this, press strip 12 and magnet steel 13 have been anchored on the inwall of yoke 11, as shown in fig. 7, installation is true
For empty bag 16 in the inwall of yoke 11, the periphery wall of vacuum bag 16 forms the die cavity of filling bonding agent with the inwall of yoke 11；In the die cavity
Arrangement reinforcing material 17, flow-guiding screen 18 and release cloth in advance, wherein, the use that reinforcing material 17 is used to increase protection coating 15 is strong
Degree, flow-guiding screen 18 are used for the bonding agent water conservancy diversion for filling process, release cloth in order to after solidifying vacuum bag 16 be convenient in demoulding.
Therefore, can be pre- by pressure sensor, temperature sensor and humidity sensor in the forming process of protection coating 15
It is embedded between braid layer, after protection coating 15 is molded, each sensor can be realized during follow-up operation in protection coating 15
The monitoring of each parameter.
Specifically, in monitoring process, temperature sensor pre-buried in coating 15 can will be protected with aforementioned encapsulation in piezoelectricity
Temperature-sensing element in film 21 is combined, because temperature-sensing element is between protection coating 15 and press strip 12, equivalent to positioned at anti-
The layer bottom of coating 15 is protected, so both combine the thermograde change that can be appreciated that protection coating 15, certainly, in practice also can be anti-
Temperature sensor is set again between shield coating 15 and magnet steel 13, to be combined with pre-buried temperature sensor；If thermograde increases
Add, illustrate to protect that coating 15 is thickening, and the air accumulated therebetween increases, this kind of phenomenon is to be characterized by it after damp and hot expansion
One；Meanwhile after unit starting, because the air of accumulation increases, it is rapid that when gases are heated, they expand, pressure sensor, humidity sensor
The detected value climbing speed of device can be speeded.That is, temperature sensor, humidity sensor and pressure pre-buried in protection coating 15
Cooperate monitoring between force snesor, helps to understand the damp and hot inflation status of protection coating 15.
In addition, it can also reflect whether protection coating 15 is shelled with magnet steel 13 according to each sensor pre-buried in protection coating 15
From information.
Specifically, if protection coating 15 is peeled off with magnet steel 13, then the pressure sensor 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, and after shutdown, the detection numerical value climbing speed of humidity sensor is very fast, for open-type
Wind-driven generator is especially true.
Protect pressure sensor, temperature sensor and humidity sensor pre-buried in coating 15 can also be to protecting coating 15
Degree of aging sensed.
Illustrated 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 being rained in wind power plant region, protect in coating 15 that humidity sensor reflection humidity value increase is few, the sun shines again after the rain unit
After running several days time, humidity reduces (mass dryness fraction increase), while in running, the detection numerical value of temperature sensor rises soon
Speed, the detection numerical value change of pressure sensor is smaller, numerical fluctuations are smaller；Occur with the continuity of run time：Wind power plant
After the rainy day, protect the humidity ratio of coating 15 to decline than before more, or constantly declining, 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 to be layered, and possesses accumulation humid air or rainwater
Structure, the pore structure of loose structure are 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 lengthening, and humidity sensor even becomes closer to saturation (close to 100%),
Represent the loose structure of protection coating 15 under motor internal action of alternative electric field, the lasting alternation effect for the stress that expands with heat and contract with cold
Under, coating 15 is deeply protected in accumulation ice dissolution, and forms the effect of frost heave at low temperature, and pore structure has been formed, and
Through the circumference throughout whole protection coating 15.
In specific scheme, the pressure sensor, temperature sensor and the humidity sensor that are embedded in inside protection coating 15
Be structure as a whole with protection coating 15, in this way, can avoid because set pressure sensor, temperature sensor and humidity sensor and
To artificial exfoliated state caused by protection coating 15.
More specifically, for ease of setting, pressure sensor, temperature sensor and humidity sensor can also be with foregoing classes
Seemingly, by the way of piezoelectric membrane encapsulates temperature-sensing element and humidity sensing element, here is omitted.
It is pointed out that what is set between foregoing press strip 12 and protection coating 15 is packaged with temperature-sensing element and humidity sensitive
The piezoelectric membrane 21 of element and pressure sensor, temperature sensor and the humidity sensor inside pre-buried protection coating 15 are from two
Individual different angle reflects the situation between the state for protecting coating 15 and press strip 12 and magnet steel 13, so, in practice,
Above-mentioned more sensing elements can be combined preferably to know the running status of each associated components in permanent magnetism magnetic pole running.
Fig. 4 is refer to, Fig. 4 is the part for 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 uniformity and permanent magnetism magnetic pole running of each press strip fastening.
Certainly, aforementioned memory can also receive and store the detection signal of second detection components.
Press strip 12 is fastened by bolt 14 and the inwall of yoke 11, and the tightness of press strip 12 and the inwall of yoke 11 is to follow-up magnetic
There is influence in steel 13, and the running status of magnet steel during follow-up operation 13 is produced between adjacent two press strip 12 whether can be pushed into
It is raw to influence.
It is embodied in, if the fastening force of bolt 14 is excessive, resistance is larger when being pushed into magnet steel 13, it is most likely that can fill
Timing will magnet steel 13 cause to damage, if the fastening force of bolt 14 is less than normal, although will not be had an impact to the push-in of magnet steel 13,
It is easily to cause the play between press strip 12 of magnet steel 13, in the process of running, will necessarily be made because of play to associated components after assembling
Into damage.
In the program, the second detection components include being arranged at the pressure sensor 31a on the head of bolt 14 and are arranged at pressure
Pressure sensor 31b between bar 12 and the inwall of yoke 11.
Specifically, for ease of arranging and measuring, pressure sensor 31a also can be selected foregoing polyvinylidene fluoride and pass
Feel material, the pressure change that pressure sensor 31a is formed is exported as feature when being loosened by bolt 14.
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, protection coating 15 is impacted, so, pass through pressure sensor
31a detection value changes will appreciate that the loosening situation of bolt 14 in running, so as to grasp the loosening state of press strip 12, together
When also can to protect coating 15 situation give reference.
The fastening press strip of bolt 14 when pressure sensor 31b between press strip 12 and the inwall of yoke 11 can detect assembling
12 tightness, so as to ensure the uniformity of each fastening of press strip 12, and then ensure the uniformity that magnet steel 13 assembles.
In addition, pressure sensor 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 the pressure biography for being arranged at the two sides that press strip 12 contacts with magnet steel 13
Sensor 31c.
Pressure sensor 31c can measure the compression variable condition of press strip 12 and the contact surface of magnet steel 13, according to this
The contact condition that compression change can reflect between press strip 12 and magnet steel 13, so as to know whether magnet steel 13 is shaken by simple
It is dynamic to become play, and whether crack even fragmentation；It is appreciated that the running status of magnet steel 13 and not merely by pressure pass
Sensor 31c, the pressure sensor 31a that can be also set with the foregoing head of bolt 14, and the pressure between protection coating 15 and press strip 12
The grade detecting element of conductive film 21 be combined with each other judgement.
Specifically, for ease of arranging and measuring, foregoing polyvinylidene fluoride equally can be selected in pressure sensor 31c
Sensing material.
In addition, 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 multilayer magnet steel of same magnetic and the protection coating for being filled in 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 it is anti-
The top surface that shield coating 15 contacts is installed with the first piezoelectric membrane, that is to say, that fixes the piezoelectric membrane 21 of foregoing monitoring device
In the top surface of press strip 12, i.e. this press strip 12 is the press strip for carrying sensing element.
Specifically, temperature-sensing element is packaged with the piezoelectric membrane 21, also can further encapsulates humidity sensing element.
It is pointed out that because press strip 12 carries temperature-sensing element, so press strip 12 can use hygroscopicity small in practice
Insulating materials be made, that is to say, that, it is desirable to press strip 12 itself is insensitive to temperature change, so as not to influence temperature-sensing element survey
Amount.
So, permanent magnetism magnetic pole can still assemble according to existing mode, and after assembling, the press strip 12 for carrying sensing element can
In permanent magnetism magnetic pole running, the state of protection coating 15, magnet steel 13 and press strip 12 etc. is monitored, according to encapsulation thoughts
The specific state for how reacting protection coating 15, magnet steel 13 and press strip 12 etc. of warm element, the piezoelectric membrane 21 of humidity sensing element,
It can refer to and understand above, here is omitted.
In addition, on this basis, also it can distinguish fixed second piezoelectric membrane, press strip 12 here in the two sides of press strip 12
Side refer to trapezoidal inclined plane, namely the side contacted with magnet steel 13.It is appreciated that the second piezoelectric membrane is effectively equivalent to herein
The pressure sensor 31c of foregoing monitoring device, second piezoelectric membrane can be carried out to the contact stress of press strip 12 and magnet steel 13
Sensing, so as to provide reference frame to understand the running status of magnet steel 13.
Specifically, polyvinylidene fluoride piezoelectricity can be selected in the first piezoelectric membrane and the second piezoelectric membrane that press strip 12 carries
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, poly- inclined two are make use of
The principle of fluoroethylene film transversely deforming output charge, because the electric capacity of PVDF piezoelectric film is smaller, when by external force
Caused electric charge is difficult to keep for a long time during effect, therefore the dynamic monitoring preferably for structure., can in specific set
So that the second piezoelectric membrane of the two sides of press strip 12 to be arranged in series, to increase output quantity.
In addition, 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 as the cable tray of other monitoring elements.
As above, by related transducer element with press strip 12 is fixed is integrated, in actual monitoring, each sensing element reflection is
The stress situation of change of press strip 12, but according to the relation of active force and reaction force, can know what is contacted with press strip 12 accordingly
The stressing conditions of opposed parts.
Please also refer to Fig. 5 and Fig. 6, wherein, Fig. 6 shows the force analysis signal of the press strip of permanent magnetism magnetic pole.
As shown in figure 5, illustrating so that corner is marked with 1,234 one block of digital magnet steel 13 as an example, magnet steel 13 is in the process of running
By power f1 along the circumferential direction, the corner of the lower floor of magnet steel 13 is illustrated exemplified by being marked with 5678 digital magnet steel 13, magnet steel 13
Also acted in the process of running by the periodicity of radial direction magnetic pull,⊙ represents the change in radial direction magnetic pull direction, Ye Jixiang
Outer or inside arrow, which points to, represents cyclically-varying.
Between being squeezed in two press strips 12 due to magnet steel 13, so by the analysis to the stressing conditions of press strip 12, it 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 the contact surface of press strip 12, and f3 represents that the radial direction magnetic pull of magnet steel 13 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 produced 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
Prevention and balance of the interaction force by the contact face of press strip 12 between armature.In addition, rotor is a thin cylinder, add
Work manufactures and alignment error, bearing wear, rotor bow etc. causes rotor eccentric relative to stator, can also produce single-edge magnetic drawing
Power, all can indirectly-acting 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.
The press strip of the monitoring device to magneto permanent magnetism magnetic pole provided by the present invention and permanent magnetism magnetic pole is carried out above
It is discussed in detail.Specific case used herein is set forth to the principle and embodiment of the present invention, above example
Explanation be only intended to help understand the present invention method 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 and modification can also be carried out to the present invention, these
Improve and modification is also fallen into 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 multilayer magnetic along the axial same magnetic of yoke wall
Steel and the protection coating for being filled in 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, the running status of coating is protected described in permanent magnetism magnetic pole running for detecting；It includes setting
Piezoelectric membrane between the press strip and the protection coating, is packaged with temperature-sensing element in the piezoelectric membrane；The piezoelectricity
Film is used to perceive protection coating stress variation caused by press strip surface, or press strip stress to caused by protection coating becomes
Change；
Memory, for receiving and storing the detection signal of first detection components.
2. monitoring device according to claim 1, it is characterised in that humidity sensitive member is also packaged with the piezoelectric membrane
Part.
3. monitoring device according to claim 2, it is characterised in that the piezoelectric membrane is included with being connect at the top of the press strip
Tactile bottom wall section and the side wall sections of the magnet steel contacts side surfaces and the flange section with the protection coating contacts.
4. according to the monitoring device described in claim any one of 1-3, it is characterised in that the piezoelectric membrane is to gather 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 are also described including being embedded in
Pressure sensor, temperature sensor and the humidity sensor protected inside coating.
6. monitoring device according to claim 5, it is characterised in that first detection components are also described including being arranged on
The temperature sensor protected between coating and the magnet steel.
7. monitoring device according to claim 5, it is characterised in that the protection coating is with being embedded in the protection coating
Internal pressure sensor, temperature sensor and humidity sensor is 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 uniformity of each press strip fastening and permanent magnetism magnetic pole operation in permanent magnetism magnetic pole forming process
During press strip loosening state；
The memory also receives 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 being arranged at the spiral shell
The pressure sensor of bolt head and the pressure sensor 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 being arranged at institute
State the pressure sensor for the two sides that press strip contacts with the magnet steel.
11. monitoring device 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.
12. the press strip of permanent magnetism magnetic pole, the permanent magnetism magnetic pole include along yoke wall axially the multilayer 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 top surface of the press strip and the protection coating contacts is installed with the first piezoelectric membrane, is encapsulated in first piezoelectric membrane
There is temperature-sensing element；First piezoelectric membrane is used to perceive protection coating stress variation caused by press strip surface, or press strip
The stress variation to caused by protection coating.
13. press strip according to claim 12, it is characterised in that be also packaged with humidity sensitive in first piezoelectric membrane
Element.
14. press strip according to claim 12, it is characterised in that the two sides difference that the press strip contacts with the magnet steel
It is installed with the second piezoelectric membrane.
15. press strip according to claim 14, it is characterised in that two second piezoelectric membranes of the press strip two sides
It is arranged in series.
16. press strip according to claim 14, it is characterised in that the press strip and first piezoelectric membrane, described the
Two piezoelectric membranes are integrally formed.
17. press strip 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. according to the press strip described in claim any one of 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. according to the press strip described in claim any one of 12-17, it is characterised in that the press strip is the small insulation of hygroscopicity
Press strip made of material.
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| 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 |
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| 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 |
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| 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 |
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| CN102096044B (en) * | 2010-12-13 | 2012-12-05 | 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 |
| CN104158375B (en) * | 2014-08-21 | 2017-02-01 | 江西工埠机械有限责任公司 | Super-low-speed high-torque motor and crane with motor |
| CN108724764A (en) * | 2014-08-27 | 2018-11-02 | 新疆金风科技股份有限公司 | System and method is perfused in the vacuum assisted resin of permanent magnet machine 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 |
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