CN207664854U - A kind of hydrogenerator electric brake arrangement - Google Patents
A kind of hydrogenerator electric brake arrangement Download PDFInfo
- Publication number
- CN207664854U CN207664854U CN201721917105.9U CN201721917105U CN207664854U CN 207664854 U CN207664854 U CN 207664854U CN 201721917105 U CN201721917105 U CN 201721917105U CN 207664854 U CN207664854 U CN 207664854U
- Authority
- CN
- China
- Prior art keywords
- stator
- rotor
- hydrogenerator
- core
- braking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model belongs to technical field of hydraulic generators, and in particular to a kind of hydrogenerator electric brake arrangement solves the electric braking technical problem of hydrogenerator.It is characterized in that, hydrogenerator electric brake arrangement includes stator and rotor, rotor includes rotor core, naked conducting bar, connection ring, it is arranged in the shaft (8) of hydrogenerator, with shaft (8) coaxial rotating, stator includes engine base, stator core, terminal box, three-phase symmetrical stator winding, the coaxial direction in shaft (8) is arranged in it, it is fixed by bolts on the base plate of turbine-generator units and is parallel to rotor, the air gap is maintained between stator and rotor；The utility model is contactless braking; braking is not reached with friction energy-dissipating; there is no dust, pollution, smog and peculiar smell; the switching of braking is controlled by the break-make of control circuit; also it can pass through the size adjusting brake moment of control circuit electric current, the remote automatic control of power station parking brake easy to implement.
Description
Technical field
The utility model belongs to technical field of hydraulic generators, and in particular to a kind of hydrogenerator electric brake arrangement.
Background technology
The hydrogenerator rotating part in power station has larger weight, therefore its rotary inertia is also larger, is shutting down
Cheng Zhong, if not braked and being allowed to free running down to full cut-off, stopping process will be very long, and bearing bush and runner plate are in low speed
The lower duration of runs is long, causes bearing shell oil film breakdown, burns out bearing shell.Traditional Hydropower Plant is by the way of mechanical braking：
Compressed air pushes brake plunger to reach friction catch shutdown, is braked, is added when generating unit speed declines to a certain extent
Speed stalling.This mode of braking is easy to implement, and braking time is short, but facts have proved that this mode of braking has be difficult to overcome to lack
Point：This is a kind of braking of friction energy-dissipating, and brake(-holder) block generates thermal energy and mechanical stress with brake hoop when braking, and not only brake(-holder) block is easily ground
Damage, brake hoop will also result in abrasion, deformation or even cracking；Brake pad wear rise dirt, bearing get rid of oil generator in, dust with
Mist of oil bonding is attached to generator coil, iron core etc., blocks air duct, causes generator heat-radiation difficult, it is exhausted to influence generator
Edge；Brake cannot automatically reset sometimes, and after shutdown, operations staff needs to pierce machine hole and checks, or even is fallen with crowbar sled
Brake plunger；Smog and peculiar smell are generated when braking, the health of operations staff are influenced, especially in the frequent regulating units of start and stop
It is even more serious.Therefore, the turbine-generator units in power station should find a kind of new parking brake method, such as electric braking.
Utility model content
Problem to be solved in the utility model is：It is asked for existing for current power station turbine-generator units mechanical braking
Topic, provide it is a kind of do not use friction energy-dissipating to brake, without dust, without polluting, without the electric brake arrangement of smog and peculiar smell.
To solve the above problems, the utility model uses following technical proposals：
It is opposite to be passed through three using electromagnetic induction principle in threephase stator winding for a kind of electric brake of water-wheel type generator device
After claiming alternating current, a rotating excitation field will be generated, the rotating excitation field is cut when the rotation of the rotating part of turbine-generator units, from
And induced current is generated in rotor windings, the rotor conductor of current-carrying will generate electromagnetic force under the effect of stator rotating excitation field, from
And electromagnetic torque is formed in the rotating part of turbine-generator units, when setting makes direction of rotation and the hydraulic generator of the electromagnetic torque
When the direction of rotation of unit is opposite, the rotator inertia of turbine-generator units when shutting down can be offset, achievees the purpose that parking brake.
Its structure includes stationary part and rotor portion, stationary part and rotor portion placement parallel to each other, and keeps one
Fixed the air gap.Stationary part includes：Engine base, stator core, stator winding, terminal box etc.；Rotor portion includes：Rotor iron
Core, naked conducting bar, connection ring etc..Wherein, stator core by the good silicon steel sheet stack of magnetic property at belonging to permeable section, stator iron
In-core circle fluting；Three-phase symmetrical stator winding is positioned in the slot that stator core inner circle is opened, and belongs to current-carrying part；Stator core
It is fixed on engine base；Terminal box is used to provide three-phase alternating-current supply to three-phase symmetrical stator winding；Rotor core is by silicon steel sheet stack
At can also be replaced with cast steel, iron core surface is provided with several symmetrically uniformly distributed slots, and one is put into each slot and conductive naked is led
Item, conducting bar are copper rod, aluminium bar etc., and conducting bar both ends are connected with metal connection ring, form symmetrical short-circuit winding.
Description of the drawings
Attached drawing 1 is the utility model embodiment structural schematic diagram；
Attached drawing 2 is the utility model stator winding wiring diagram；
Attached drawing 3 is the formation of the utility model rotating excitation field；
Attached drawing 4 is utility model works schematic diagram；
Attached drawing 5 is the utility model embodiment rotating part structural schematic diagram；
Attached drawing reference name：Rotating excitation field 1 is closed conductor 2, connection ring 2-1, naked conducting bar 2-2, rotor core (flywheel) 2-
3, engine base 3, stator core 4, terminal box 5, three-phase symmetrical stator winding 6, outer cover 7, shaft 8.
Specific implementation mode
It is readily apparent to make the technical solution of the utility model, creation characteristic, reaching effect, with reference to being specifically illustrating,
The utility model is expanded on further.
Referring to attached drawing 2, attached drawing 3, threephase stator winding AX, BY, CZ, the rule that they spatially press 120 ° of mutual deviation is symmetrical
Arrangement, and be connected into star and be connected with three phase mains U, V, W, then threephase stator winding will pass through three-phase symmetrical electric current, fixed in three-phase
Rotating excitation field is just will produce in sub- winding：
When wt=0 °, iA=0, no current in AX windings；IB is negative, and the electric current in BY windings flows into B outflows from Y；iC
For just, the electric current in CZ windings flows into Z outflows from C；Direction such as attached drawing 3 (a) institute of resultant magnetic field can be obtained by right-hand screw rule
Show.
When wt=120 °, iB=0, no current in BY windings；IA is that just, the electric current in AX windings flows into X outflows from A；
IC is negative, and the electric current in CZ windings flows into C outflows from Z；The direction such as attached drawing 3 (b) of resultant magnetic field can be obtained by right-hand screw rule
It is shown.
When wt=240 °, iC=0, no current in CZ windings；IA is negative, and the electric current in AX windings flows into A outflows from X；
IB is that just, the electric current in BY windings flows into Y outflows from B；The direction such as attached drawing 3 (c) of resultant magnetic field can be obtained by right-hand screw rule
It is shown.
As it can be seen that when the curent change a cycle in stator winding, the phase sequence direction of electric current is also pressed in sky in resultant magnetic field
Between rotate a circle.As the three-phase current in stator winding constantly makees cyclically-varying, the resultant magnetic field of generation is also constantly
Rotation, because of referred to herein as rotating excitation field.
Referring to attached drawing 4, if placing a closure conductor 2, when being closed the rotation of conductor 2, rotating excitation field between rotating excitation field 1
1 occurs relative motion with conductor 2 is closed, and is closed conductor 2 and cuts the magnetic line of force of rotating excitation field 1 and generate induction electric inside it
Gesture and induced current.As soon as induced current makes closure conductor 2 be acted on by an electromagnetic force again, conductor 2 is then closed along rotation
The direction of rotation in magnetic field 1 rotates, and here it is the basic principles of electric braking.
Referring to attached drawing 5, attached drawing 1, in the turbine-generator units of power station, can by with the flywheel of 8 coaxial rotating of shaft or turn
The brake disc of sub- yoke regards rotor core 2-3 as.Referring to attached drawing 1, rotor core (flywheel) 2-3 is steel-casting, in rotor iron
Several equally distributed slots are processed in the plane of core (flywheel) 2-3 to place naked conducting bar 2-2, the quantity and size root of slot
It is fixed according to the size of braking moment, naked conducting bar 2-2 is placed in slot and is fixed, and naked conducting bar 2-2 is the conductive materials such as copper, aluminium, then
The both ends of naked conducting bar 2-2 are connected with metal connection ring 2-1, all naked conducting bar 2-2 is made to form a closure conductor 2,
The rotor portion of the composition described above present invention.Engine base 3 is welded into for steel plateelement, to secured core and winding, can be fixed with bolt
On the base plate of turbine-generator units, stator core 4 is 0.5mm by thickness, and the silicon steel sheet stack of mutual insulating is on silicon steel sheet
There is equally distributed slot, the quantity of slot is fixed according to the size of braking moment, three-phase symmetrical stator winding 6 is placed in slot, winding can
By star or delta connection, lead-out wire leads to terminal box 5, is electrically connected with three-phase symmetrical exchange.The composition described above present invention's
Stationary part.Stationary part and rotor portion placement parallel to each other, and certain the air gap is kept, the size in gap is according to system
The size of kinetic moment is fixed, is covered stationary part and rotor portion with outer cover 7.
The course of work is：When power station turbine-generator units are shut down, rotating speed declines to a certain extent, and shaft 8 continues to drive
The closure conductor 2 being made of connection ring 2-1, naked conducting bar 2-2, rotor core (flywheel) 2-3 slowly runs, at this point, passing through wiring
Box 5 is passed through three-phase symmetrical alternating current to three-phase symmetrical stator winding 6, generates a rotating excitation field 1 in stationary part, is closed conductor
Rotating excitation field 1 is cut when 2 rotation, in the closure being made of connection ring 2-1, naked conducting bar 2-2, rotor core (flywheel) 2-3
Induced current is generated in conductor 2, the closure conductor 2 of current-carrying will generate electromagnetic force under the action of rotating excitation field 1, in water wheels
The rotating part of generating set forms electromagnetic torque, and the direction of rotation of the direction of rotation for making the electromagnetic torque and shaft 8 is on the contrary, support
Disappear the rotator inertias of turbine-generator units, is finally reached the purpose of parking brake.
The utility model is suitable for vertical or horizontal power station turbine-generator units.
Utility model effect
The utility model is contactless braking, does not reach braking with friction energy-dissipating, without dust, without polluting, not having cigarette
Mist and peculiar smell are to achieve the purpose that electric braking using electromagnetic induction principle, and braking is controlled by the break-make of control circuit
Switching can also pass through the size adjusting brake moment of control circuit electric current, the remote auto of power station parking brake easy to implement
Change control.
Claims (3)
1. a kind of hydrogenerator electric brake arrangement, which is characterized in that hydrogenerator electric brake arrangement include stator and
Rotor, the rotor are arranged in the shaft (8) of hydrogenerator, and with shaft (8) coaxial rotating, stator setting exists
The coaxial direction of shaft (8), stator are fixed by bolts on the base plate of turbine-generator units and are parallel to rotor, stator and turn
The air gap is maintained between son；The rotor includes rotor core (2-3), naked conducting bar (2-2), connection ring (2-1), is being turned
Several equally distributed grooves are machined with along radial direction in the plane of sub- iron core (2-3), place naked conducting bar in a groove
(2-2) is simultaneously fixed, and the outboard end of naked conducting bar (2-2) and inner end are connected with connection ring (2-1) respectively, is made all naked
Conducting bar (2-2) forms one and is closed conductor (2)；The stator includes engine base (3), stator core (4), terminal box (5), three-phase
Symmetrical stator winding (6), stator core (4) by mutual insulating silicon steel sheet stack at, silicon steel sheet is equipped with equally distributed groove,
Three-phase symmetrical stator winding (6) is placed in groove, three-phase symmetrical stator winding (6) is connected by star or delta connection, three-phase
The lead-out wire of symmetrical stator winding (6) leads to terminal box (5), and is electrically connected with three-phase symmetrical exchange, stator core (4) and three-phase
Symmetrical stator winding (6) is mounted in engine base (3), and engine base (3) is fixed by bolts on the base plate of turbine-generator units.
2. a kind of hydrogenerator electric brake arrangement according to claim 1, which is characterized in that the rotor core
(2-3) is the steel flywheel of turbine-generator units or the brake disc of rotor rim.
3. a kind of hydrogenerator electric brake arrangement according to claim 1, which is characterized in that the stator and turn
Son placement parallel to each other, and certain the air gap is kept, stationary part and rotor portion are covered with outer cover 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721917105.9U CN207664854U (en) | 2017-12-31 | 2017-12-31 | A kind of hydrogenerator electric brake arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721917105.9U CN207664854U (en) | 2017-12-31 | 2017-12-31 | A kind of hydrogenerator electric brake arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207664854U true CN207664854U (en) | 2018-07-27 |
Family
ID=62944777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721917105.9U Expired - Fee Related CN207664854U (en) | 2017-12-31 | 2017-12-31 | A kind of hydrogenerator electric brake arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207664854U (en) |
-
2017
- 2017-12-31 CN CN201721917105.9U patent/CN207664854U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104169531B (en) | The flame-out method operating turbogenerator afterwards | |
| CN101908807B (en) | Multi-winding asynchronous change-pole generator | |
| CN207568661U (en) | Vertical two-stage permanent magnetism gas suspension ORC cogeneration machines | |
| CN207664854U (en) | A kind of hydrogenerator electric brake arrangement | |
| CN2826811Y (en) | Highly effective super-low speed wind-power generator | |
| CN103269141B (en) | U-shaped Electrocontrolled magnetomotive machine | |
| CN108110991A (en) | A kind of hydrogenerator electric brake arrangement | |
| CN201116514Y (en) | Vertical axis windmill generator | |
| CN202586691U (en) | Permanent magnet synchronous wind-driven generator | |
| CN101546981B (en) | Vertical wind power generator with motor startup mode | |
| CN103670933A (en) | Wind collecting suspension type wind driven generator | |
| CN106992636A (en) | A kind of restoring on line machine | |
| CN207010386U (en) | A kind of automobile using lightweight magneto | |
| CN112769358A (en) | Triangular two-stage type autonomous resonance cooperative speed limiting system and fan with same | |
| CN206293880U (en) | Motor sweeps a protector | |
| CN106452201A (en) | Asynchronous motor energy consumption braking control system | |
| CN205407651U (en) | Electrical panel car controlling means | |
| Ge et al. | Study on electrical braking of huge hydro-generator | |
| CN103973046B (en) | Capstan operated type magneto | |
| CN203574516U (en) | Brushless electro-magnetic lower-speed generator applicable to low-wind-speed wind mill | |
| CN103840629A (en) | Three-phase asynchronous motor | |
| CN204465241U (en) | The conveyer belt damping belt wheel of regenerative braking electricity generate function and conveyer belt conveyer | |
| CN205792008U (en) | A kind of automobile specified novel electricity generator | |
| CN109763947A (en) | Mechanical energy collection device | |
| CN103546007B (en) | Brushless electro-magnetic low-speed generator suitable for low-wind-speed wind turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180727 Termination date: 20211231 |