CN206117338U - High security leak protection magnetism electric motor rotor - Google Patents
High security leak protection magnetism electric motor rotor Download PDFInfo
- Publication number
- CN206117338U CN206117338U CN201620969317.0U CN201620969317U CN206117338U CN 206117338 U CN206117338 U CN 206117338U CN 201620969317 U CN201620969317 U CN 201620969317U CN 206117338 U CN206117338 U CN 206117338U
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- China
- Prior art keywords
- rotor
- pressure
- core
- pressure sensor
- end plates
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a high security leak protection magnetism electric motor rotor, its structure includes: pivot, rotor core, winding, rotor end plate, articulation hole bolt, rotor core is a plurality of fan -shaped pole core, rotor end plate, articulation hole bolt all adopt non - magnetic materials, and the rotor core both ends have to cut with scissors makes the hole, articulation hole bolt will the rotor end plate is fixed rotor core's both ends prevent the magnetic leakage, and have still inlayed the pressure gasket on the rotor end plate, it with the pressure piece of the downthehole embedding of hinge system constitutes the pressure system, can send pressure signal to outside receiving arrangement to exceed when predetermineeing safe value at pole core centrifugal force, send out police dispatch newspaper and supply interruption by outside receiving arrangement, safety that maximum assurance motor moved.
Description
Technical field
The utility model is related to field of motor manufacturing, more particularly to electricity that is a kind of safe and can effectively preventing leakage field
Machine rotor.
Background technology
On AC network, people are also used extensively by AC asynchronous motor to drag work mechanism.Alternating current asynchronous are electronic
Machine has the advantages that simple structure, reliable operation, life-span length, low cost, maintenance are easy.But, with synchronous motor phase
Than the generation of its rotating excitation field need to draw reactive power from electrical network, therefore efficiency is low, and power factor is low, and especially in underloading, this is big
The loss of circuit and electrical network is increased greatly.For a long time, in the occasion for not requiring speed governing, such as blower fan, water pump, machine tool
In driving, asynchronous motor still occupies leading position, virtually have lost a large amount of electric energy, the birth of permasyn morot,
Overcome with the shortcoming of upper motor, three-phase permanent-magnetic synchronous motors are consistent with the stationary part of three phase asynchronism induction-motor,
Its main distinction is that, in rotor portion, its rotor adopts solid construction, and with permanent magnet electric shock magnetic magnetic pole is substituted, and simplifies structure,
Slip ring, the brush of rotor are eliminated, brushless structure is realized, rotor volume is reduced；Excitation DC power supply is eliminated, is eliminated
Excitatory loss.But because the big problem of permanent-magnet synchronous motor rotor magnetic leakage factor inevitably causes the stray loss of motor
Cause that the motor feels hot greatly, exacerbate the temperature rise of motor, easily make the permanent magnet in rotor body produce non-reversible high-temperature loss of excitation, while
Because permanent-magnet synchronous motor rotor magnetic leakage factor is big, permanent-magnet material utilization rate is reduced.On the other hand, due to permanent magnet synchronous electric
The distinctive magnetic shielding structure of motivation causes mechanical strength and rigidity poor, and rotor sector solid magnetic pole iron core is easily because centrifugal force comes off
Cause motor operation accident so that the security reliability of motor operation is substantially reduced, and causes motor damage.
The content of the invention
The utility model is big to solve existing permanent-magnet synchronous motor rotor assembly magnetic leakage factor, causes the spuious damage of motor
Consumption is big so that the motor feels hot, permanent-magnet material utilization rate is low, and rotor sector solid magnetic pole iron core is easily made because centrifugal force comes off
Into the problem of motor operation accident, there is provided a kind of to connect non-using non-magnet material hinged bolts in rotor magnetic pole iron core both sides
Structure of the permeability magnetic material rotor end plates every magnetic.The utility model structure includes rotor core, rotating shaft, rotor end plates, articulation hole spiral shell
Bolt, pressure sensitivity pad, winding；The winding is wound on the rotor core；The rotor core is fixed in the rotating shaft, its
Including some fan-shaped solid magnetic pole iron cores, the rotor end plates, hinged bolts adopt non-magnet material, and the sector is solid
There are some articulation holes at pole core two ends；The rotor end plates are embedded with two pressure sensitivity pads, two pressure sensitivity pad phases
For the axis hole at the rotor end plates center is centrosymmetric, and each fan-shaped solid magnetic pole iron core of pressure sensitivity pad correspondence one；
There are some screw areas in the rotor end plates, wherein each fan-shaped solid magnetic pole iron core of screw area correspondence one, use the articulation
Hole bolt is fixed on the rotor end plates in the articulation hole at the fan-shaped solid magnetic pole iron core two ends；Fill in the pressure sensitivity pad
There is pressure sensor device.
Preferably, the screw in the screw area has three floor, every layer of screw is located on same circular arc, from paraxial hole to distal shaft hole
Quantity be respectively 1,3,4, totally 8, wherein the screw institute being embedded with the middle of the screw area second row of the rotor end plates of pressure sensitivity pad
In the articulation hole of corresponding fan-shaped solid magnetic pole iron core, in the smooth side wall of the nearly axis hole dovetail groove, the swallow are carved with
Tail connected in star is built with pressure sensor piece.
Preferably, the pressure sensor piece answers any of both diaphragms of material piece, hydrostatic sensor for voltage inductance；
Its corresponding pressure sensor device of difference is piezoelectric transducer, hydrostatic sensor.
Preferably, the pressure sensor piece answers material piece for voltage inductance, the pressure sensor device is piezoelectric transducer, band
The nut lower surface of the corresponding hinged bolts of articulation hole of dovetail groove has copper facing, and the piezoelectric transducer is to the articulation hole
There is loop between bolt.
Preferably, the power supply of the pressure sensor device is built-in lithium battery or closing coil.
Preferably, the non-magnet material is copper, aluminium or stainless steel.
Preferably, also including automatic overvoltage power off device, the automatic overvoltage power off device includes external reception device, control
Device processed, relay；The external reception device can receive the pressure signal that the pressure sensor device sends, in the pressure for receiving
Force signal exceedes on the control device during default rated value, controls the relay cut-out motor by control device and supplies
Electricity, to protect motor safety to run.
Preferably, the method for determining rated value as claimed in claim 7, comprises the following steps：
S1. manufacture has and the swallow-tail form ditch on the circular dies consistent with the articulation hole pore size and its wall
Groove shape groove of the same size；
S2. fixation pressure sensing chip in the groove in mould in step sl, and by pressure sensor piece and pressure sensing
Device connects, and by the external external reception device of pressure sensor device；
S3. pressurizeed to the inwall of the circular dies in step S1 with hydraulic press, the pressing mold of the hydraulic press only with
The pressure sensor piece is completely attached to, and is stopped when the pressure that hydraulic press applies is equal to the permitting stress of the hinged bolts
Pressurization, and record the i.e. described rated value of pressure value that the external reception device shows；The pressure is applied by hydraulic press
Plus pressure and the pressing mold of hydraulic press and the squish area of dovetail channel it is calculated.
Principle and effect：The rotor end plates and non-magnet material hinged bolts of non-magnet material completely close permanent-magnet steel
In rotor body, the substantially the same magnetic conductivity with vacuum of magnetic conductivity of non-magnet material so that the leakage field at rotor block two ends is non-
Often little, the main flux overwhelming majority linkage armature winding that permanent-magnet steel is provided to external magnetic circuit, the utilization rate of permanent-magnet steel is improved,
Achieve good magnetism isolating effect.Meanwhile, according to the big of the rotor sector solid magnetic pole centrifugal force in synchronizing motors unshakable in one's determination
It is little, rotor end plates thickness and hinged bolts diameter are designed by Strength co-mputation so that whole rotor forms one, improves forever
The strength and stiffness of magneto rotor assembly, it is to avoid rotor sector solid magnetic pole iron core easily causes motor because centrifugal force comes off
Interruption of service, and dovetail channel is provided with articulation hole side wall, and pressure sensitive device is fixed wherein, and to pressure sensitivity pad
In pressure sensor device send signal so that hinged bolts are by shearing force in whole system energy real-time monitoring solid magnetic pole
Situation, and when it is reached default rated value by shearing force, by automatic overvoltage power off device automatically cutting off power source, improve motor
The security reliability of operation, it is to avoid cause motor damage.
Description of the drawings
Fig. 1 is the first visual angle of the utility model schematic diagram.
Fig. 2 is the utility model rotor end plates structural representation.
Fig. 3 is the cross-sectional view of articulation hole of the utility model with swallow-tail form.
Specific embodiment
Embodiment one
As shown in Figure 1, Figure 2, Figure 3 shows, the utility model structure includes rotor core 13, rotating shaft 11, rotor end plates 12, articulation
Hole bolt 14, pressure sensitivity pad 23, winding；The winding is wound on the rotor core 13；The rotor core 13 is fixed on
In the rotating shaft 11, it includes 4 pieces of fan-shaped solid magnetic pole iron cores, and the rotor end plates 11, hinged bolts 14 are led using non-
There are some articulation holes 15 at magnetic material, the fan-shaped solid magnetic pole iron core two ends；The rotor end plates 12 are embedded with two pressure sensitivity
Pad 23, two pressure sensitivity pads 23 are centrosymmetric relative to the axis hole at the center of the rotor end plates 12, and each pressure sensitivity
23, pad correspondence one sector solid magnetic pole iron core；There are some screw areas in the rotor end plates 12, wherein each screw area pair
A fan-shaped solid magnetic pole iron core is answered, the rotor end plates 12 are fixed on into the fan-shaped solid magnetic with the hinged bolts 14
In the articulation hole 15 at pole iron core two ends；Pressure sensor device 22 is housed in the pressure sensitivity pad 23.
More specifically, the screw in the screw area has three floor, and every layer of screw is located on same circular arc, from paraxial hole to remote
The quantity of axis hole is respectively 1,3,4, totally 8, wherein being embedded with the middle of the screw area second row of the rotor end plates 12 of pressure sensitivity pad 23
Screw 21 corresponding to fan-shaped solid magnetic pole iron core articulation hole 32 in, be carved with swallow-tail form in the smooth side wall of the nearly axis hole
Groove 31, the dovetail groove 31 should also include hard filler built with pressure sensor piece, pressure sensor piece here,
To make pressure sensor piece be close to the inwall of articulation hole 32, make dynamometry more accurate.
More specifically, the pressure sensor piece answers material piece for voltage inductance, and the pressure sensor device is piezoelectric sensing
Device, the nut lower surface of the corresponding hinged bolts of articulation hole 32 with dovetail groove 31 has copper facing, the piezoelectric transducer
22 to having loop 24 between the hinged bolts.
More specifically, the power supply of the pressure sensor device is built-in lithium battery or closing coil.
More specifically, the non-magnet material is copper, aluminium or stainless steel.
More specifically, also including automatic overvoltage power off device, the automatic overvoltage power off device is filled including external reception
Put, control device, relay；The external reception device can receive the pressure signal that the pressure sensor device sends, and connect
The pressure signal of receipts exceedes on the control device during default rated value, and by control device the relay cut-out electricity is controlled
Machine is powered, to protect motor safety to run.
Embodiment two
The utility model is used for three-phase permanent-magnetic synchronous motors, rated power 500kw, rated voltage 6000v, rated current
51.6A, frequency 50HZ, 1000 revs/min of rotating speed.Rotor sector solid magnetic pole iron core external diameter Φ 500mm, the fan-shaped solid magnetic of rotor
Internal diameter extremely unshakable in one's determination（Magnetic shield external diameter）Φ 280mm, core length 590mm.
Rotor end plates adopt non-magnet material stainless steel, thickness 15mm, hinged bolts to adopt non-magnet material stainless steel,
Threaded portion M24, articulation hole smooth part Φ 25mm.
Rotor core two ends end plate and hinged bolts：
（1）, material be 304 stainless steels, end plate thickness 15mm, hinged bolts smooth part Φ 25mm, quantity 8.304
Stainless steel material allowable stress [σ]=137.6MP, permitting stress [τ]=85MP, permissible compression stress [σ y]=150MP.
（2）, calculation and check：
A. per pole iron core position of centre of gravity：
RZ = 38.2（R3-r3）sinα/（R2-r2）α= 191.15mm
In formula：RZ------- is per pole rotor sector magnetic pole iron core position of centre of gravity；
R-------- is per pole rotor sector magnetic pole iron core exradius；
R-------- is per pole rotor sector magnetic pole iron core inner circle（Sleeve）Radius；
α --- ----sector center of circle half-angle.
B. per pole iron core centrifugal force：
F=Mv2/RZ=0.00112M RZ 22032.3 ㎏ of nN2==216060.3N
In formula：F-------- is per pole rotor sector magnetic pole iron core centrifugal force；
M-------- is per pole rotor sector magnetic pole iron core weight；
V------- position of centre of gravity linear velocities；
NN-------- motors（Rotor）Rotating speed.
C. hinged bolts shear strength is checked：
τ=F/8A=F/8（πr2L）=55MP≤[τ]
In formula：τ --- --- -- hinged bolts shear strengths；
The permitting stress of [τ] --- -- material；
The A-------- hinged bolts sections of shear；
RL-------- hinged bolts smooth part radiuses.
D. hinged bolts and end plate crushing strength are checked：
σ=F/8A1=F/8（dt）=72MP≤[σy]
In formula：σ --- --- -- hinged bolts and end plate crushing strength；
The permissible compression stress of [σ y] --- -- material；
A1-------- hinged bolts and end plate squish area；
D--------- hinged bolts diameters；
T--------- rotor end plates thickness.
Calculate by more than and find out, using 15mm thickness rotor end plates and 8 hinged bolts connections, fully meet rotor
The requirement of sector magnetic pole iron core centrifugal force during work.
Embodiment three
The method for determining default rated value in embodiment one, comprises the following steps：
S1. manufacture has and the swallow-tail form on the circular dies consistent with the pore size of the articulation hole 32 and its wall
The consistent groove of the shape size of groove 31；
S2. fixation pressure sensing chip in the groove in mould in step sl, and by pressure sensor piece and pressure sensing
Device 22 connects, and by the external external reception device of pressure sensor device 22；
S3. pressurizeed with the inwall of circular dies described in hydraulic press to step S1, the pressing mold of the hydraulic press only with it is described
Pressure sensor piece is completely attached to, and stops adding when the pressure that hydraulic press applies is equal to the permitting stress of the hinged bolts 14
Pressure, and record the i.e. described rated value of pressure value that the external reception device shows；The pressure is applied by hydraulic press
Pressure and hydraulic press pressing mold it is calculated with the squish area of dovetail channel 31.
The utility model preferred embodiment is these are only, therefore can not according to this limit the scope of the utility model enforcement, i.e.,
The equivalence changes made according to the utility model description and decoration, all should belong in the range of the utility model covering.
Claims (7)
1. a kind of high security leakproof magneto rotor, it is characterised in that：Including rotor core, rotating shaft, rotor end plates, articulation hole
Bolt, pressure sensitivity pad, winding；The winding is wound on the rotor core；The rotor core is fixed in the rotating shaft,
It includes some fan-shaped solid magnetic pole iron cores, and the rotor end plates, hinged bolts adopt non-magnet material, described fan-shaped real
There are some articulation holes at heart pole core two ends；The rotor end plates are embedded with two pressure sensitivity pads, two pressure sensitivity pads
It is centrosymmetric relative to the axis hole at the rotor end plates center, and each fan-shaped solid magnetic pole iron of pressure sensitivity pad correspondence one
Core；There are some screw areas in the rotor end plates, wherein each fan-shaped solid magnetic pole iron core of screw area correspondence one, use the hinge
Drilling bolt is fixed on the rotor end plates in the articulation hole at the fan-shaped solid magnetic pole iron core two ends；In the pressure sensitivity pad
Equipped with pressure sensor device.
2. high security leakproof magneto rotor according to claim 1, it is characterised in that：The screw in the screw area has three
Layer, every layer of screw is located on same circular arc, and the quantity from paraxial hole to distal shaft hole is respectively 1,3,4, totally 8, wherein being embedded with pressure
In the articulation hole of the fan-shaped solid magnetic pole iron core corresponding to screw in the middle of the screw area second row of the rotor end plates of sense pad, closely
Dovetail groove is carved with the smooth side wall of the axis hole, the dovetail groove is built with pressure sensor piece.
3. high security leakproof magneto rotor according to claim 2, it is characterised in that：The pressure sensor piece is piezoelectricity
Any of both inductive material piece, the diaphragm of hydrostatic sensor；Its corresponding pressure sensor device of difference is piezoelectric sensing
Device, hydrostatic sensor.
4. high security leakproof magneto rotor according to claim 3, it is characterised in that：The pressure sensor piece is piezoelectricity
Inductive material piece, the pressure sensor device be piezoelectric transducer, the corresponding hinged bolts of the articulation hole with dovetail groove
Nut lower surface have copper facing, there is loop between the hinged bolts in the piezoelectric transducer.
5. high security leakproof magneto rotor according to claim 1, it is characterised in that：The electricity of the pressure sensor device
Source is built-in lithium battery or closing coil.
6. high security leakproof magneto rotor according to claim 1, it is characterised in that：The non-magnet material be copper,
Aluminium or stainless steel.
7. high security leakproof magneto rotor according to claim 3, it is characterised in that：Also fill including over-voltage automatic power-off
Put, the automatic overvoltage power off device includes external reception device, control device, relay；The external reception device can connect
The pressure signal that the pressure sensor device sends is received, in the pressure signal for receiving the default volume on the control device is exceeded
During definite value, the relay cut-out motor is controlled by control device and is powered, to protect motor safety to run.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620969317.0U CN206117338U (en) | 2016-08-30 | 2016-08-30 | High security leak protection magnetism electric motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620969317.0U CN206117338U (en) | 2016-08-30 | 2016-08-30 | High security leak protection magnetism electric motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206117338U true CN206117338U (en) | 2017-04-19 |
Family
ID=58513670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620969317.0U Withdrawn - After Issue CN206117338U (en) | 2016-08-30 | 2016-08-30 | High security leak protection magnetism electric motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206117338U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300741A (en) * | 2016-08-30 | 2017-01-04 | 徐延平 | High security magnetic-leakage preventing rotor |
-
2016
- 2016-08-30 CN CN201620969317.0U patent/CN206117338U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300741A (en) * | 2016-08-30 | 2017-01-04 | 徐延平 | High security magnetic-leakage preventing rotor |
| CN106300741B (en) * | 2016-08-30 | 2019-04-16 | 徐延平 | High security leakproof magneto rotor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170419 Effective date of abandoning: 20190416 |