CN220703052U - Rotary motor control system of large-scale flat-head tower crane - Google Patents
Rotary motor control system of large-scale flat-head tower crane Download PDFInfo
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- CN220703052U CN220703052U CN202321843438.7U CN202321843438U CN220703052U CN 220703052 U CN220703052 U CN 220703052U CN 202321843438 U CN202321843438 U CN 202321843438U CN 220703052 U CN220703052 U CN 220703052U
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Abstract
The utility model discloses a control system of a large-scale flat-head tower crane rotary motor, which comprises a motor power supply, a frequency converter, four rotary motors, an eddy current controller, an eddy current brake, a motor brake and a brake control circuit, wherein the motor power supply is connected with the frequency converter; each rotary motor is provided with an eddy current brake and a motor brake, each eddy current brake is connected with the eddy current controller, the eddy current controller is connected with the frequency converter, each motor brake is controlled by the brake control circuit, four motor brakes form a first motor brake group and a second motor brake group in pairs, and the first motor brake group acts after delaying the set time and the second motor brake group acts after the first motor brake group acts. The rotary motors use low-power motors to reduce power consumption, the low-power motors are distributed diagonally in pairs, the stability in starting and stopping is improved through the eddy current brakes, two motor brakes on the same diagonal line act first to stop the two rotary motors, and the other two rotary motors stop after a certain time delay, so that rocking of the rocker arm is avoided.
Description
Technical Field
The utility model belongs to the field of crane control, and particularly relates to a large-scale flat-head tower crane rotary motor control system.
Background
In construction, particularly heavy objects and high construction, a crane, particularly a large flat-head tower crane, is often needed, 2 high-power motors are usually used for directly controlling start and stop of the large flat-head tower crane through a frequency converter, and two motor brakes used during stop act simultaneously.
Disclosure of Invention
The utility model provides a control system for a rotary motor of a large-sized flat-head tower crane, which is driven by a plurality of low-power motors under the action of a frequency converter, an eddy current controller and an eddy current brake are added to improve the stability of the rotary motor when the rotary motor is started and stopped, and the brakes of the rotary motor are started successively according to diagonal distribution, so that swing of a rocker arm is avoided.
The technical scheme adopted by the utility model is as follows:
a control system of a large-scale flat-head tower crane rotary motor comprises a motor power supply, a frequency converter, four rotary motors, an eddy current controller, an eddy current brake, a motor brake and a brake control circuit; the motor power supplies power to four rotary motors through a frequency converter, two rotary motors positioned on the diagonal line are in a group, each rotary motor is provided with an eddy current brake and a motor brake, each eddy current brake is connected with an eddy current controller, the eddy current controller is connected with the frequency converter, each motor brake is controlled by a brake control circuit, the four motor brakes are in a group of two-by-two mode to form a first motor brake group and a second motor brake group, and the first motor brake group acts after a set time delay. The rotary motors use low-power motors to reduce power consumption, the low-power motors are distributed diagonally in pairs, the stability in starting and stopping is improved through the eddy current brakes, two motor brakes on the same diagonal line act first to stop the two rotary motors, and the other two rotary motors stop after a certain time delay, so that rocking of the rocker arm is avoided.
As a preferable scheme of the utility model, the brake control circuit comprises a brake main circuit and a control circuit, wherein the brake main circuit comprises a 24V brake power supply, a brake breaker QF2, a brake contactor normally open contact and a motor brake; the 24V braking power supply is divided into four paths after passing through a braking breaker QF2, each path is connected with a movable contact of a normally open contact of a braking contactor, and a static contact of the normally open contact of the braking contactor is connected with a motor brake.
As a preferable scheme of the utility model, the brake contactor comprises a first brake contactor normally-open contact KM1, a second brake contactor normally-open contact KM2, a third brake contactor normally-open contact KM3 and a fourth brake contactor normally-open contact KM4; the fixed contact of the first brake contactor normally open contact KM1 is connected with a first motor brake FZ1, the fixed contact of the second brake contactor normally open contact KM2 is connected with a second motor brake FZ2, the fixed contact of the third brake contactor normally open contact KM3 is connected with a third motor brake FZ3, and the fixed contact of the fourth brake contactor normally open contact KM4 is connected with a fourth motor brake FZ 4.
As a preferable scheme of the utility model, the control circuit comprises a control power supply, a frequency converter operation control contact, a frequency converter operation switch coil K1, a frequency converter fault control contact, a frequency converter fault coil K2, a frequency converter fault normally-closed contact K2, a frequency converter operation switch normally-open contact K1, a PLC control contact and a brake contactor coil; the PLC control contacts comprise a first control normally open contact KP1, a second control normally open contact KP2, a third control normally open contact KP3 and a fourth control normally open contact KP4; the brake contactor coils comprise a first brake contactor coil KM1, a second brake contactor coil KM2, a third brake contactor coil KM3 and a fourth brake contactor coil KM4; between the loops of the control power supply, a frequency converter operation control contact and a frequency converter operation switch coil K1 are connected in series to form a frequency conversion operation sub-circuit, and a frequency converter fault control contact and a frequency converter fault coil K2 are connected in series to form a frequency conversion fault sub-circuit; the frequency converter operation control contact and the frequency converter fault control contact are respectively connected with the frequency converter; the frequency converter fault normally-closed contact K2, the frequency converter operation switch normally-open contact K1, the first control normally-open contact KP1 and the first brake contactor coil KM1 are connected in series, the second control normally-open contact KP2 and the second brake contactor coil KM2 are connected in series, the third control normally-open contact KP3 and the third brake contactor coil KM3 are connected in series, the fourth control normally-open contact KP4 and the fourth brake contactor coil KM4 are connected in series, and the first control normally-open contact KP1 and the third control normally-open contact KP3 act simultaneously; the second control normally open contact KP2 and the fourth control normally open contact KP4 are delayed for a set time and then operate.
As a preferable scheme of the utility model, when the frequency converter runs and has no faults, a frequency converter running control contact is closed, a frequency converter running switch coil K1 is electrified, a frequency converter running switch normally open contact K1 is closed, a first control normally open contact KP1 and a third control normally open contact KP3 are closed, a first brake contactor coil KM1 and a third brake contactor coil KM3 are electrified, a first brake contactor normally open contact KM1 and a third brake contactor normally open contact KM3 are closed, and a first motor brake FZ1 and a third motor brake FZ3 act simultaneously; after the delay setting time, the second control normally open contact KP2 and the fourth control normally open contact KP4 are closed, the second brake contactor normally open contact KM2 and the fourth brake contactor normally open contact KM4 are closed, and the second motor brake FZ2 and the fourth motor brake FZ4 act simultaneously.
According to the utility model, the original two high-power motors are replaced by four low-power motors and distributed in a diagonal manner, each rotary motor is provided with the vortex brake to improve the stability of the rotary motor when the rotary motor is started and stopped, and the motor brakes corresponding to the rotary motors are distributed in a diagonal manner, so that the rotary motor on one diagonal is stopped firstly and then stopped after a certain time delay by the PLC control, the rocking of a rocker arm is effectively avoided, and the safety in construction is improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a circuit diagram of a variable frequency control circuit of a rotary motor according to the present utility model.
Fig. 2 is a circuit diagram of the brake main circuit of the present utility model.
Fig. 3 is a circuit diagram of the control circuit of the present utility model.
Fig. 4 is a control schematic diagram of the PLC control contact of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.
Examples:
a control system of a large-scale flat-head tower crane rotary motor comprises a motor power supply, a frequency converter, four rotary motors, an eddy current controller, an eddy current brake, a motor brake and a brake control circuit;
the 380V motor power supply supplies power to four rotary motors through a variable frequency circuit breaker QF1 and a frequency converter BP, as shown in FIG. 1, two rotary motors positioned on the diagonal line are a group, in the embodiment, a first rotary motor M1 and a third rotary motor M3 are a group, and a second rotary motor M2 and a fourth rotary motor M4 are a group; each rotary motor is provided with an eddy current brake and a motor brake, and the eddy current brakes are a first eddy current brake WL1, a second eddy current brake WL2, a third eddy current brake WL3 and a fourth eddy current brake WL4 respectively; the first vortex brake WL1, the second vortex brake WL2, the third vortex brake WL3 and the fourth vortex brake WL4 are all connected with the vortex controller WLK, the vortex controller is connected with the frequency converter, the power supply end of the vortex controller WLK is connected with the low-voltage side of the transformer T1, and the high-voltage side of the transformer T1 is connected with a 380V motor power supply through the breaker QF 3.
Each motor brake is controlled by a brake control circuit, and four motor brakes are arranged in pairs to form a first motor brake group and a second motor brake group, and the first motor brake group acts after being delayed for a set time and the second motor brake group acts after being acted.
The brake control circuit comprises a brake main circuit and a control circuit, wherein the brake main circuit comprises a 24V brake power supply, a brake breaker QF2, a brake contactor normally open contact and a motor brake as shown in figure 2; the 24V braking power supply is divided into four paths after passing through a braking breaker QF2, each path is connected with a movable contact of a normally open contact of a braking contactor, and a static contact of the normally open contact of the braking contactor is connected with a motor brake.
Specifically, the brake contactor comprises a first brake contactor normally-open contact KM1, a second brake contactor normally-open contact KM2, a third brake contactor normally-open contact KM3 and a fourth brake contactor normally-open contact KM4; the fixed contact of the first brake contactor normally open contact KM1 is connected with a first motor brake FZ1, the fixed contact of the second brake contactor normally open contact KM2 is connected with a second motor brake FZ2, the fixed contact of the third brake contactor normally open contact KM3 is connected with a third motor brake FZ3, and the fixed contact of the fourth brake contactor normally open contact KM4 is connected with a fourth motor brake FZ 4.
The control circuit, as shown in figure 3, comprises a 220V control power supply, frequency converter operation control contacts M1-M2, a frequency converter operation switch coil K1, a frequency converter fault control contact MA-MC, a frequency converter fault coil K2, a frequency converter fault normally-closed contact K2, a frequency converter operation switch normally-open contact K1, a PLC control contact and a brake contactor coil; the PLC control contacts are controlled by a PLC controller, and the control principle is shown in figure 4, and the PLC control contacts comprise a first control normally-open contact KP1, a second control normally-open contact KP2, a third control normally-open contact KP3 and a fourth control normally-open contact KP4; the brake contactor coils comprise a first brake contactor coil KM1, a second brake contactor coil KM2, a third brake contactor coil KM3 and a fourth brake contactor coil KM4; firstly, arranging a breaker QF4 between loops of a control power supply, wherein a frequency converter operation control contact and a frequency converter operation switch coil K1 are connected in series to form a frequency conversion operation sub-circuit, and a frequency converter fault control contact and a frequency converter fault coil K2 are connected in series to form a frequency conversion fault sub-circuit; the frequency converter operation control contact and the frequency converter fault control contact are respectively connected with the frequency converter; the frequency converter fault normally-closed contact K2, the frequency converter operation switch normally-open contact K1, the first control normally-open contact KP1 and the first brake contactor coil KM1 are connected in series, the second control normally-open contact KP2 and the second brake contactor coil KM2 are connected in series, the third control normally-open contact KP3 and the third brake contactor coil KM3 are connected in series, the fourth control normally-open contact KP4 and the fourth brake contactor coil KM4 are connected in series, and the first control normally-open contact KP1 and the third control normally-open contact KP3 act simultaneously; the second control normally open contact KP2 and the fourth control normally open contact KP4 are delayed for a set time and then operate.
When the frequency converter runs and has no faults, the frequency converter running control contact is closed, the frequency converter running switch coil K1 is electrified, the frequency converter running switch normally open contact K1 is closed, the first control normally open contact KP1 and the third control normally open contact KP3 are closed, the first brake contactor coil KM1 and the third brake contactor coil KM3 are electrified, the first brake contactor normally open contact KM1 and the third brake contactor normally open contact KM3 are closed, and the first motor brake FZ1 and the third motor brake FZ3 act simultaneously; after the delay setting time, the second control normally open contact KP2 and the fourth control normally open contact KP4 are closed, the second brake contactor normally open contact KM2 and the fourth brake contactor normally open contact KM4 are closed, and the second motor brake FZ2 and the fourth motor brake FZ4 act simultaneously.
The eddy current brake intervenes to enable the rotary motor to stably act when the motor is started and stopped, and the rocker arm does not swing when the motor is stopped because the diagonal rotary motor is braked successively.
In the description of the present specification, reference to the terms "one embodiment," "example," "specific example," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (5)
1. A large-scale flat-head tower machine rotary motor control system is characterized in that: the motor comprises a motor power supply, a frequency converter, four rotary motors, an eddy current controller, an eddy current brake, a motor brake and a brake control circuit; the motor power supplies power to four rotary motors through a frequency converter, two rotary motors positioned on the diagonal line are in a group, each rotary motor is provided with an eddy current brake and a motor brake, each eddy current brake is connected with an eddy current controller, the eddy current controller is connected with the frequency converter, each motor brake is controlled by a brake control circuit, the four motor brakes are in a group of two-by-two mode to form a first motor brake group and a second motor brake group, and the first motor brake group acts after a set time delay.
2. The large-scale flat-head crane rotary motor control system according to claim 1, wherein: the brake control circuit comprises a brake main circuit and a control circuit, wherein the brake main circuit comprises a 24V brake power supply, a brake breaker QF2, a brake contactor normally open contact and a motor brake; the 24V braking power supply is divided into four paths after passing through a braking breaker QF2, each path is connected with a movable contact of a normally open contact of a braking contactor, and a static contact of the normally open contact of the braking contactor is connected with a motor brake.
3. The large-scale flat-head crane rotary motor control system according to claim 2, wherein: the brake contactor comprises a first brake contactor normally-open contact KM1, a second brake contactor normally-open contact KM2, a third brake contactor normally-open contact KM3 and a fourth brake contactor normally-open contact KM4; the fixed contact of the first brake contactor normally open contact KM1 is connected with a first motor brake FZ1, the fixed contact of the second brake contactor normally open contact KM2 is connected with a second motor brake FZ2, the fixed contact of the third brake contactor normally open contact KM3 is connected with a third motor brake FZ3, and the fixed contact of the fourth brake contactor normally open contact KM4 is connected with a fourth motor brake FZ 4.
4. A large-scale flat-head machine rotary motor control system according to claim 3, wherein: the control circuit comprises a control power supply, a frequency converter operation control contact, a frequency converter operation switch coil K1, a frequency converter fault control contact, a frequency converter fault coil K2, a frequency converter fault normally-closed contact K2, a frequency converter operation switch normally-open contact K1, a PLC control contact and a brake contactor coil; the PLC control contacts comprise a first control normally open contact KP1, a second control normally open contact KP2, a third control normally open contact KP3 and a fourth control normally open contact KP4; the brake contactor coils comprise a first brake contactor coil KM1, a second brake contactor coil KM2, a third brake contactor coil KM3 and a fourth brake contactor coil KM4; between the loops of the control power supply, a frequency converter operation control contact and a frequency converter operation switch coil K1 are connected in series to form a frequency conversion operation sub-circuit, and a frequency converter fault control contact and a frequency converter fault coil K2 are connected in series to form a frequency conversion fault sub-circuit; the frequency converter operation control contact and the frequency converter fault control contact are respectively connected with the frequency converter; the frequency converter fault normally-closed contact K2, the frequency converter operation switch normally-open contact K1, the first control normally-open contact KP1 and the first brake contactor coil KM1 are connected in series, the second control normally-open contact KP2 and the second brake contactor coil KM2 are connected in series, the third control normally-open contact KP3 and the third brake contactor coil KM3 are connected in series, the fourth control normally-open contact KP4 and the fourth brake contactor coil KM4 are connected in series, and the first control normally-open contact KP1 and the third control normally-open contact KP3 act simultaneously; the second control normally open contact KP2 and the fourth control normally open contact KP4 are delayed for a set time and then operate.
5. The large-scale flat-head crane rotary motor control system according to claim 4, wherein: when the frequency converter runs and has no faults, the frequency converter running control contact is closed, the frequency converter running switch coil K1 is electrified, the frequency converter running switch normally open contact K1 is closed, the first control normally open contact KP1 and the third control normally open contact KP3 are closed, the first brake contactor coil KM1 and the third brake contactor coil KM3 are electrified, the first brake contactor normally open contact KM1 and the third brake contactor normally open contact KM3 are closed, and the first motor brake FZ1 and the third motor brake FZ3 act simultaneously; after the delay setting time, the second control normally open contact KP2 and the fourth control normally open contact KP4 are closed, the second brake contactor normally open contact KM2 and the fourth brake contactor normally open contact KM4 are closed, and the second motor brake FZ2 and the fourth motor brake FZ4 act simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321843438.7U CN220703052U (en) | 2023-07-13 | 2023-07-13 | Rotary motor control system of large-scale flat-head tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321843438.7U CN220703052U (en) | 2023-07-13 | 2023-07-13 | Rotary motor control system of large-scale flat-head tower crane |
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| Publication Number | Publication Date |
|---|---|
| CN220703052U true CN220703052U (en) | 2024-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321843438.7U Active CN220703052U (en) | 2023-07-13 | 2023-07-13 | Rotary motor control system of large-scale flat-head tower crane |
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| Country | Link |
|---|---|
| CN (1) | CN220703052U (en) |
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2023
- 2023-07-13 CN CN202321843438.7U patent/CN220703052U/en active Active
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