CN108768071A - A kind of supercritical speed shafting device and its braking method - Google Patents
A kind of supercritical speed shafting device and its braking method Download PDFInfo
- Publication number
- CN108768071A CN108768071A CN201810524294.6A CN201810524294A CN108768071A CN 108768071 A CN108768071 A CN 108768071A CN 201810524294 A CN201810524294 A CN 201810524294A CN 108768071 A CN108768071 A CN 108768071A
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- friction plate
- pure iron
- electrical pure
- permanent magnet
- rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
- H02K7/16—Structural association with mechanical loads, e.g. with hand-held machine tools or fans for operation above the critical speed of vibration of the rotating parts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
- H02K7/1021—Magnetically influenced friction brakes
- H02K7/1023—Magnetically influenced friction brakes using electromagnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
A kind of supercritical speed shafting device of present invention offer and its braking method, including pedestal, driving motor and load motor at pedestal both ends is set, the axis being arranged between driving motor output end and load motor output end, it is arranged in axis upper rotor part, rotational speed monitor system, being evenly arranged on the circumferencial direction of the rotor can be along the I-shaped permanent magnet of rotor axial play, movable friction plate is installed on each I-shaped permanent magnet, ring-like frame is additionally provided on the pedestal, electrical pure iron is uniformly installed on the circumferencial direction of ring-like frame, and the quantity of electrical pure iron is equal with the quantity of I-shaped permanent magnet, it is provided on static friction plate and electrical pure iron on the end face of each electrical pure iron and is wound with spiral winding, static friction plate, movable friction plate is oppositely arranged, using contactless between the rotational speed probe and axis of rotary speed detecting system.Structure of the invention is novel, and overall structure is simple, easy to process, is easily installed in equipment.
Description
Technical field
The present invention relates to a kind of shafting rotor oscillation restraining device more particularly to a kind of supercritical speed shafting device and its
Braking method belongs to rotor antivibration area.
Background technology
The rapid development of drive shaft system device is widely used in aerospace, ship, big-block engine and gas turbine unit
In, in occupation of important position in every field, however the vibration and noise problem of shafting device is increasingly serious.Large size rotation
The rotating speed of host when mechanical equipment operates and shafting device resonates then is known as critical speed；Critical speed lower rotor part works
When, resonance, which occurs, for system can aggravate the vibration noise of entire shafting device, cause mechanical system parts fragile, substantially reduce
The working life of mechanical equipment, results even in the accident of fatal crass.Therefore, rotor how is effectively reduced in critical speed
When vibratory response become a current technical barrier in the urgent need to address.
In recent years, having there are some documents for crossing critical speed about shafting device energy quick and stable.Northwest industry
University Liao Ming husbands (application for a patent for invention number 200410073346.0) disclose a kind of inhibition band resilient support vibration of rotor system
Method and device, frictional force is generated by relative motion between kinematics and static friction piece in dry damping device, in rotor-support-foundation system
Middle introducing damping, reduces vibratory response amplitude of the rotor in critical speed.(invention is special for Nanjing Aero-Space University Zhu such as roc
Sharp application number 201510030850.0) the supercritical rotor vibration absorber that discloses combined damping strategy, by will passively subtract
Vibrating device is applied in combination with active damper, adjusts rigidity and the damping of drive shaft system, ingenious to avoid critical turn of shafting device
Resonance region of the son in Up and down speeding, it is suppressed that vibratory response when combined critical speed.In order to more preferably improve and reduce axis
It is resonance response of the device in critical speed, the present invention devises a kind of adjusting shafting device by the way of electromagnetic excitation
Rigidity between upper movable friction plate and static friction plate can cleverly avoid resonance critical speed, realize and shake to weakening shafting device
Dynamic purpose.
Invention content
The purpose of the invention is to provide a kind of supercritical speed shafting device and its braking method, for solving large size
Rotating machinery steadily cannot vibrate the problems such as excessive quickly through first critical speed, system at critical speed.
The object of the present invention is achieved like this：Including pedestal, be arranged pedestal both ends driving motor and load motor,
The axis that is arranged between driving motor output end and load motor output end, setting are described in axis upper rotor part, rotational speed monitor system
It is evenly arranged with and can pacify on each I-shaped permanent magnet along the I-shaped permanent magnet of rotor axial play on the circumferencial direction of rotor
Equipped with movable friction plate, it is additionally provided with ring-like frame on the pedestal, electrical pure iron is uniformly installed on the circumferencial direction of ring-like frame, and
The quantity of electrical pure iron is equal with the quantity of I-shaped permanent magnet, and static friction plate and electricity are provided on the end face of each electrical pure iron
Spiral winding is wound on work pure iron, static friction plate, movable friction plate are oppositely arranged, the rotational speed probe of rotary speed detecting system and axis it
Between using contactless.
The invention also includes some such structure features：
1. the number of the I-shaped permanent magnet, electrical pure iron is even number, and the spiral on two neighboring electrical pure iron
The current direction of coil is opposite.
2. the quantity of electrical pure iron and the quantity of I-shaped permanent magnet are eight.
3. a kind of braking method of supercritical speed shafting device, including the supercritical speed shafting device, eight
Electrical pure iron is denoted as b1 to b8 successively, and I-shaped permanent magnet is denoted as a1 to a8 successively,
(1) when rotor speed is by first critical speed, to the spiral winding on electrical pure iron b1, b3, b5 and b7
Corresponding I-shaped permanent magnet a1, a3, a5 and a7 are drawn through by logical forward current, the electrical pure iron after energization, lead to dynamic friction
Piece and static friction plate contact with each other, and contact stiffness between the two is made to change, by adjust spiral winding in electric current it is big
Small to change frictional force between the two and rigidity value, at this moment the critical speed of system is got higher, far from original critical speed area
Domain, and then shafting device vibratory response is made to reduce；
(2) after by first critical speed, the forward direction in spiral winding on electrical pure iron b1, b3, b5 and b7 is disconnected
Electric current gives the spiral winding on electrical pure iron b2, b4, b6 and b8 to lead to backward current at this time, electrical pure iron b2, b4 after energization,
B6 and b8 pushes through I-shaped permanent magnet a2, a4, a6 and a8, and movable friction plate and static friction plate is caused in axial direction to detach,
The critical speed of shafting system in this way has returned to original fixed value, and rotor-support-foundation system safety and steady has passed through critical speed；
(3) fast braking of rotor：Movable friction plate and static friction plate are in discrete state when initial, when driving motor is unexpected
It,, only need to be to electrical pure iron in order to realize to its fast braking since the entire rotor of inertia can be constantly in rotary state when shutdown
On spiral winding be powered, the attraction of I-shaped permanent magnet is come, movable friction plate and static friction plate is made to contact, passes through and adjusts spiral
The size of electric current changes frictional force between the two and rigidity value in coil, realizes the fast braking to rotor-support-foundation system.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention is only needed by changing energization spiral winding
Electric current, you can frictional force and rigidity between adjustment electromagnet and I-shaped permanent magnet, and then realize movable friction plate and static friction
Rubbing between piece is touched and is detached.Structure of the invention is novel, and overall structure is simple, easy to process, is easily installed in equipment.
Description of the drawings
Fig. 1 is general structure schematic diagram of the present invention.
Fig. 2 is the rotor schematic diagram that the present invention contains I-shaped permanent magnet.
Fig. 3 is the ring support schematic diagram of the invention containing electrical pure iron.
Specific implementation mode
Present invention is further described in detail with specific implementation mode below in conjunction with the accompanying drawings.
The present invention specifically includes：Pedestal, driving motor, left end shaft coupling, axis, rotor, I-shaped permanent magnet, dynamic friction
Piece, static friction plate, spiral winding, electrical pure iron, ring support, right end shaft coupling, load motor, rotary speed detecting system.Driving
Shaft coupling is connected between motor and axis；Shaft coupling is connected between load motor and axis；With key connection between rotor and axis；Turn
It is connected with I-shaped permanent magnet on son, movable friction plate is installed on I-shaped permanent magnet, I-shaped permanent magnet can edge on rotor
Axial float and can only play in an axial direction；Static friction plate is installed on electrical pure iron.Electrical pure iron is fixed on a toroidal support,
It is wound with spiral winding on electrical pure iron and constitutes solenoid part；I-shaped permanent magnet and electrical pure iron face.Entire rotor
Rack is mounted on the base, and ring support is fixed on pedestal.It is connect using non-between the rotational speed probe and axis of rotary speed detecting system
Touch.
In conjunction with Fig. 1-3, one embodiment of the present of invention is provided：The number of wherein I-shaped permanent magnet and electrical pure iron is eight
It is a, the present invention include pedestal 1, driving motor 2, left end shaft coupling 3, axis 4, rotor 5, I-shaped permanent magnet 6, movable friction plate 7-1,
Static friction plate 7-2, spiral winding 8, electrical pure iron 9, ring support 10, right end shaft coupling 11, load motor 12, Rotating speed measring system
System 13.A1-a8 is the I-shaped permanent magnet containing movable friction plate, has magnetism always.B1-b8 is the electrician containing static friction plate
Pure iron, the spiral winding on b1, b3, b5 and b7 lead to forward current, and the spiral winding on b2, b4, b6 and b8 leads to backward current；It is logical
Cross size of current in change spiral coil, you can adjust the active force between I-shaped permanent magnet and electrical pure iron, and then realize
Rubbing between movable friction plate and static friction plate is touched and is detached.
The principle of the present invention is (being illustrated so that the number of I-shaped permanent magnet and electrical pure iron is six as an example)：Entirely
Rotating speed is zero to shafting device at the beginning, and movable friction plate and static friction plate are in discrete state；When shafting device operates, by turning
Fast detecting system probe detection shaft frequency, and then tachometer value can be observed in real time.When rotor-support-foundation system rotating speed is critical by the first rank
When rotating speed, lead to forward current to the spiral winding on electrical pure iron b1, b3 and b5, the electrical pure iron after energization can regard one as forever
Both magnet can be drawn through I-shaped permanent magnet a1, a3 and a5 to come, movable friction plate and static friction plate is caused to contact with each other, can make
Between contact stiffness change, the size by adjusting electric current in spiral winding changes frictional force and rigidity between the two
Value, at this moment the critical speed of system is got higher, and far from critical speed region originally, and then shafting device vibratory response is made to subtract
It is small；After shafting system is by critical speed at this time, disconnect positive electric in the upper spiral winding of electrical pure iron b1, b3 and b5
Stream gives the spiral winding on b2, b4 and b6 to lead to backward current at this time, and the electrical pure iron after energization can regard a permanent magnet as, will
I-shaped permanent magnet a2, a4 and a6 can be pushed through, movable friction plate and static friction plate is caused in axial direction to detach.Such shafting
The critical speed of system has returned to original fixed value, and rotor-support-foundation system safety and steady has passed through critical speed.
Another function of the present invention is that the fast braking of rotor-support-foundation system can be achieved, and principle is：Movable friction plate when initial
It is in discrete state with static friction plate, when driving motor is shut down suddenly, is turned since the entire rotor-support-foundation system of inertia can be constantly in
Dynamic state need to only be powered to the spiral winding on electrical pure iron in order to realize to its fast braking, I-shaped permanent magnet is attracted
Come over, so that movable friction plate and static friction plate is contacted, change friction between the two by adjusting the size of electric current in spiral winding
Power and rigidity value, and then realize the fast braking to rotor-support-foundation system.
Key connection may be used in the rotor 5 and axis 4；
Threephase asynchronous can be selected in the driving motor 2；
The electrical pure iron 9 may be used screw thread link or be welded on ring support 10；
Described 8 need of spiral winding are wrapped on electrical pure iron 9；
Described 6 numbers of 9 numbers of electrical pure iron and I-shaped permanent magnet need to be consistent, and the two faces.
The movable friction plate 7-1 can be welded on I-shaped permanent magnet 6, and static friction plate 7-2 can be welded on electrician
On pure iron 9.
The ring support 10 is fixed, is non-contacting with axis；Conducting wire on energization spiral winding 8 can
Drawn from ring support 10, if not with occur twisted wire phenomenon.
The rotary speed detecting system 13 can by current vortex sensor pop one's head in, Pulse or LMS analysis of vibration measurement instrument and
Computer forms.
Claims (4)
1. a kind of supercritical speed shafting device, it is characterised in that：Including pedestal, it is arranged in the driving motor at pedestal both ends and negative
It carries motor, the axis being arranged between driving motor output end and load motor output end, be arranged in axis upper rotor part, rotation speed monitoring system
System, be evenly arranged on the circumferencial direction of the rotor can along the I-shaped permanent magnet of rotor axial play, it is each it is I-shaped forever
Movable friction plate is installed on magnet, ring-like frame is additionally provided on the pedestal, electricity is uniformly installed on the circumferencial direction of ring-like frame
Work pure iron, and the quantity of electrical pure iron is equal with the quantity of I-shaped permanent magnet, is provided on the end face of each electrical pure iron quiet
Spiral winding is wound on friction plate and electrical pure iron, static friction plate, movable friction plate are oppositely arranged, the rotating speed of rotary speed detecting system
Using contactless between probe and axis.
2. a kind of supercritical speed shafting device according to claim 1, it is characterised in that：The I-shaped permanent magnet,
The number of electrical pure iron is even number, and the current direction of the spiral winding on two neighboring electrical pure iron is opposite.
3. a kind of supercritical speed shafting device according to claim 1 or 2, it is characterised in that：The quantity of electrical pure iron
Quantity with I-shaped permanent magnet is eight.
4. a kind of braking method of supercritical speed shafting device, it is characterised in that：Including overcritical turn described in claim 3
Fast shafting device, eight electrical pure irons are denoted as b1 to b8 successively, and I-shaped permanent magnet is denoted as a1 to a8 successively,
(1) logical just to the spiral winding on electrical pure iron b1, b3, b5 and b7 when rotor speed is by first critical speed
To electric current, corresponding I-shaped permanent magnet a1, a3, a5 and a7 are drawn through by electrical pure iron after energization, cause movable friction plate and
Static friction plate contacts with each other, and contact stiffness between the two is made to change, by adjust spiral winding in electric current size come
Change frictional force between the two and rigidity value, at this moment the critical speed of system is got higher, far from original critical speed region, into
And shafting device vibratory response is made to reduce；
(2) after by first critical speed, the forward current in spiral winding on electrical pure iron b1, b3, b5 and b7 is disconnected,
The spiral winding on electrical pure iron b2, b4, b6 and b8 is given to lead to backward current, electrical pure iron b2, b4, b6 and b8 after energization at this time
I-shaped permanent magnet a2, a4, a6 and a8 are pushed through, movable friction plate and static friction plate is caused in axial direction to detach, such axis
The critical speed of system has returned to original fixed value, and rotor-support-foundation system safety and steady has passed through critical speed；
(3) fast braking of rotor：Movable friction plate and static friction plate are in discrete state when initial, when driving motor is shut down suddenly
When, it, only need to be on electrical pure iron in order to realize to its fast braking since the entire rotor of inertia can be constantly in rotary state
Spiral winding is powered, and the attraction of I-shaped permanent magnet is come, and so that movable friction plate and static friction plate is contacted, by adjusting spiral winding
The size of middle electric current changes frictional force between the two and rigidity value, realizes the fast braking to rotor-support-foundation system.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810337733 | 2018-04-16 | ||
| CN2018103377332 | 2018-04-16 |
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| Publication Number | Publication Date |
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| CN108768071A true CN108768071A (en) | 2018-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810524294.6A Pending CN108768071A (en) | 2018-04-16 | 2018-05-28 | A kind of supercritical speed shafting device and its braking method |
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| Country | Link |
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| CN (1) | CN108768071A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594301A (en) * | 2020-12-28 | 2021-04-02 | 徐州柚创谷智能科技有限公司 | Magnetic friction plate structure for robot joint disc brake |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653699A (en) * | 2015-01-22 | 2015-05-27 | 南京航空航天大学 | Vibration reduction device and vibration reduction method for super-critical rotor by using combined type vibration reduction strategy |
| CN107276305A (en) * | 2017-06-06 | 2017-10-20 | 哈尔滨工程大学 | A kind of rotor brake |
| CN107299957A (en) * | 2017-06-06 | 2017-10-27 | 哈尔滨工程大学 | A kind of shafting vibration restraining device |
-
2018
- 2018-05-28 CN CN201810524294.6A patent/CN108768071A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653699A (en) * | 2015-01-22 | 2015-05-27 | 南京航空航天大学 | Vibration reduction device and vibration reduction method for super-critical rotor by using combined type vibration reduction strategy |
| CN107276305A (en) * | 2017-06-06 | 2017-10-20 | 哈尔滨工程大学 | A kind of rotor brake |
| CN107299957A (en) * | 2017-06-06 | 2017-10-27 | 哈尔滨工程大学 | A kind of shafting vibration restraining device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594301A (en) * | 2020-12-28 | 2021-04-02 | 徐州柚创谷智能科技有限公司 | Magnetic friction plate structure for robot joint disc brake |
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Application publication date: 20181106 |
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