CN204206034U - Machine tool emergency braking apparatus - Google Patents
Machine tool emergency braking apparatus Download PDFInfo
- Publication number
- CN204206034U CN204206034U CN201420659196.0U CN201420659196U CN204206034U CN 204206034 U CN204206034 U CN 204206034U CN 201420659196 U CN201420659196 U CN 201420659196U CN 204206034 U CN204206034 U CN 204206034U
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- power supply
- transformer
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- rotor
- motor
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Abstract
The utility model discloses a kind of electromechanical equipment emergency braking apparatus, it is connected in series a DC power supply on the normally opened contact of electromechanical equipment scram button, described DC power supply is made up of transformer and rectification circuit, and the primary coil two ends of transformer are connected on motor power two-phase inlet wire.When occurring outside having a mind to, the utility model can farthest reduce equipment inertial rundown time, reduces the injury of contingency personnel.
Description
Technical field
The utility model belongs to electromechanical equipment emergency brake device, is applicable to if lathe etc. is with the electromechanical equipment of rotation portion.
Background technology
Existing lathe etc. with the electromechanical equipment of rotation portion in running, because operating personnel are off one's guard or other reason, when being caught on clothes, gloves, pigtail by rotary part, even if operating personnel press scram button immediately, rotary part still can with inertial rotation a period of time, different according to rotating speed, the inertial rotation time, between 6-9 seconds, may damage even dead during this period of time to staff.Therefore the resistance giving motor certain is immediately the effective way allowing motor stop operating immediately.
Utility model content
For achieving the above object, the technical scheme that the utility model is taked is: a kind of electromechanical equipment emergency braking apparatus, it is characterized in that, electromechanical equipment anxious stopping, contactor normally opened contact is connected in series a DC power supply, described DC power supply is made up of transformer and rectification circuit, the primary coil two ends of transformer are connected to motor power two-phase inlet wire and upper, and the secondary coil two ends of transformer are connected on rectification circuit input contact; When pressing scram button, after two stator winding of motor and AC power disconnect, two stator winding form loop with DC power supply immediately, DC power supply can produce a stationary magnetic field in the stator windings, rotor rotates and produces induced electromotive force in this magnetic field, rotor current and stationary magnetic field produce contrary torque, the rotor turns power that this torque makes equipment inertia bring produces resistance, motor rotor is forced to stop operating rapidly, the braking force of rotor produces braking to the free-wheel power of electromechanical equipment, thus completes whole braking procedure.
Prove according to on-the-spot test, after lathe class electromechanical equipment uses the emergency braking apparatus of the application, within lathe rotation portion has been controlled in 1.5 seconds quiescent time, than the time saving 70% before not using.When occurring outside having a mind to, can farthest reduce equipment inertial rundown time, reducing the injury of contingency personnel.
Accompanying drawing explanation
Fig. 1 is the major loop schematic diagram of the utility model embodiment;
Fig. 2 is the control loop schematic diagram of the utility model embodiment.
Marginal data, FU1-start button, KM1-starting contactor, KM2-is anxious stops contactor, and KM3-stops contactor, L2, L3-motor power two-phase inlet wire, ZL-rectification circuit, T-transformer, ZL-rectification circuit, the KT-time relay.
Embodiment
Electromechanical equipment emergency braking apparatus as shown in Figure 1, it is a serial connection DC power supply on the anxious normally opened contact stopping contactor KM2 of electromechanical equipment, described DC power supply is made up of transformer T and rectification circuit ZL, the primary coil two ends of transformer T are connected on motor power two-phase inlet wire L2 and L3, and the secondary coil two ends of transformer T are connected on rectification circuit input contact, when pressing scram button, suddenly stop after contactor KM2 makes two stator winding of motor and AC power disconnect, two stator winding form loop with DC power supply immediately, DC power supply can produce a stationary magnetic field in the stator windings, rotor rotates and produces induced electromotive force in this magnetic field, rotor current and stationary magnetic field produce contrary torque, the rotor turns power that this torque makes equipment inertia bring produces resistance, motor rotor is forced to stop operating rapidly, the braking force of rotor produces braking to the free-wheel power of electromechanical equipment, thus complete whole braking procedure.
Operation principle is further illustrated below according to Fig. 2.As seen from the figure, the function circuit of electromechanical equipment is all equipped with starting contactor KM1, stops contactor KM3, suddenly stops contactor KM2 and time relay KT, when implementing the utility model, the normally opened contact of the contactor KM2 of electromechanical equipment scram button is connected in series a DC power supply; When starting electromechanical equipment, power turn-on switch, presses start button FU1, starting contactor KM1 coil electricity adhesive self-insurance, motor access three-phase alternating-current supply, startup optimization.
When needs stop in emergency, press scram button, starting contactor KM1 coil blackout, motor departs from AC power; Stop contactor KM3, the self-insurance of time relay KT coil electricity simultaneously, contactor KM3 normally opened contact is stopped to close, make suddenly to stop contactor KM2 coil electricity, suddenly stop contactor KM2 main contact by motor two stator winding access DC power supply, carry out dynamic braking, make motor speed rapidly close to zero, after time relay KT time delay certain hour, its time delay normally closed interlock disconnects, make stopping contactor KM3, time relay KT, suddenly stop contactor KM2 coil dead electricity in succession, braking procedure terminates.
Here be this emergency braking apparatus for C6140 lathe time, lathe rotary part dwell time contrast table before and after using:
| Lathe gear | Before using | After using | The minimizing time |
| At a high speed | 7 seconds | 1.5 second | 5.5 second |
| Middling speed | 5.2 second | 1.4 second | 3.8 second |
| Low speed | 5.1 second | 1.4 second | 3.8 second |
It can be seen from the table, no matter lathe at a high speed or low speed time brake hard, all completed in 1.5 seconds, braking steadily, accurate, minimum to equipment damage.
The following describes the capacity calculation methods of DC power supply transformer.
First measure the electricity group R between any two in three inlet wires of electromechanical equipment motor, measure the unloaded inlet wire current I of motor, then electricity group R, electric current I are substituted into following formula, just can obtain electric current and the voltage of DC power supply:
ID＝K*I
VD＝ID*R
In formula: required direct current during ID-braking, required direct voltage during VD-braking, K-coefficient, gets K=3.5-4;
Required transformer efficiency P=ID*VD; Because transformer only works instantaneously when braking, 1/2 of the amount of trying to please.
Below for C6140 type engine lathe, further illustrate the capacity calculation methods of DC power supply transformer.
Be about R=1 ohm through measuring lathe 7.5KW three-phase AC asynchronous motor winding two ends resistance, no-load current I=6 pacifies;
ID=4 × 6=24 pacifies;
VD=24 × 1=24 lies prostrate;
Be that 0.9 calculating: ID=24/0.9=27 pacifies by efficiency;
VD=24/0.9=27 lies prostrate;
Required transformer efficiency P=27 × 27=730 volt-ampere; The amount of trying to please 1/2 time P=730/2=365 volt-ampere; Therefore, select transformer efficiency 365 volt-amperes, output voltage 27 volts.
Claims (1)
1. a machine tool emergency braking apparatus, it is characterized in that, machine tool anxious stopping, contactor normally opened contact is connected in series a DC power supply, described DC power supply is made up of transformer and rectification circuit, the primary coil two ends of transformer are connected to motor power two-phase inlet wire and upper, and the secondary coil two ends of transformer are connected on rectification circuit input contact; When pressing scram button, after two stator winding of motor and AC power disconnect, two stator winding form loop with DC power supply immediately, DC power supply can produce a stationary magnetic field in the stator windings, rotor rotates and produces induced electromotive force in this magnetic field, rotor current and stationary magnetic field produce contrary torque, the rotor turns power that this torque makes equipment inertia bring produces resistance, motor rotor is forced to stop operating rapidly, the braking force of rotor produces braking to the free-wheel power of electromechanical equipment, thus completes whole braking procedure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420659196.0U CN204206034U (en) | 2014-11-06 | 2014-11-06 | Machine tool emergency braking apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420659196.0U CN204206034U (en) | 2014-11-06 | 2014-11-06 | Machine tool emergency braking apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204206034U true CN204206034U (en) | 2015-03-11 |
Family
ID=52663945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420659196.0U Expired - Fee Related CN204206034U (en) | 2014-11-06 | 2014-11-06 | Machine tool emergency braking apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204206034U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321881A (en) * | 2015-06-25 | 2017-01-11 | 无锡开利阀业有限公司 | Plastic ball valve |
| CN106825117A (en) * | 2017-01-05 | 2017-06-13 | 滁州美业机械制造有限公司 | A kind of refrigerator stamping parts hole position error-proof detection device |
-
2014
- 2014-11-06 CN CN201420659196.0U patent/CN204206034U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321881A (en) * | 2015-06-25 | 2017-01-11 | 无锡开利阀业有限公司 | Plastic ball valve |
| CN106825117A (en) * | 2017-01-05 | 2017-06-13 | 滁州美业机械制造有限公司 | A kind of refrigerator stamping parts hole position error-proof detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 Termination date: 20161106 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |