CN114408750B - Rotary power-loss anti-lock method and system, tower crane and storage medium - Google Patents
Rotary power-loss anti-lock method and system, tower crane and storage medium Download PDFInfo
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- CN114408750B CN114408750B CN202111654005.2A CN202111654005A CN114408750B CN 114408750 B CN114408750 B CN 114408750B CN 202111654005 A CN202111654005 A CN 202111654005A CN 114408750 B CN114408750 B CN 114408750B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/22—Control systems or devices for electric drives
- B66C13/30—Circuits for braking, traversing, or slewing motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/24—Electric or magnetic using motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- General Engineering & Computer Science (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention discloses a rotation power loss anti-lock method, a system, a tower crane and a storage medium, wherein the method comprises the following steps: when the rotation is started, the brake is controlled to be electrified so as to switch the brake to be in an open state; after the brake keeps an open state, the weather vane coil is controlled to be electrified so that the weather vane coil attracts the iron blocking piece; after the weather vane coil attracts the iron blocking sheet, the brake is controlled to lose power; when the power supply is powered off, the frequency converter is controlled to reduce the output frequency to be within the range of the preset frequency threshold value, so that the motor enters a braking state to brake the slewing mechanism. The invention solves the problem that the crane boom and the balance arm generate strong shaking due to inertia because the slewing mechanism is immediately braked by the brake when the power is suddenly cut off in the slewing motion of the existing tower crane.
Description
Technical Field
The invention relates to the field of engineering machinery, in particular to a rotation power loss anti-lock method, a rotation power loss anti-lock system, a tower crane and a computer readable storage medium.
Background
The tower crane is called tower crane in short, and is a rotary crane with a movable arm mounted on the upper part of a high tower body. The existing tower crane is generally provided with a normally closed brake, and the swing mechanism is braked by the normally closed brake. However, the tower crane is suddenly powered off in the rotary motion and is provided with the normally closed brake, the tower crane can be immediately subjected to rotary braking due to the fact that the brake coil is powered off, and the rotary mechanism can be suddenly locked in the motion. The huge inertia of the crane boom and the balance arm can cause severe impact, so that the whole tower crane comprises the crane boom and the lifting hook which shake severely, and the safety of equipment and surrounding personnel is seriously influenced.
Disclosure of Invention
The invention mainly aims to provide a rotation power loss anti-lock method, a rotation power loss anti-lock system, a tower crane and a computer readable storage medium, and aims to solve the problem that a crane boom and a balance arm strongly shake due to inertia because a brake immediately brakes a rotation mechanism when the power is suddenly cut off in the rotation motion of the existing tower crane.
In order to achieve the aim, the invention provides a rotary power-off anti-lock method, which comprises the following steps:
when the rotation is started, the brake is controlled to be electrified so as to switch the brake to be in an open state;
after the brake keeps an open state, the weather vane coil is controlled to be electrified so that the weather vane coil attracts and closes the iron blocking piece;
after the weather vane coil attracts the iron blocking sheet, the brake is controlled to lose power;
when the power supply is powered off, the frequency converter is controlled to reduce the output frequency to be within the range of the preset frequency threshold value, so that the motor enters a braking state to brake the slewing mechanism.
Further, behind the weather vane coil actuation fender piece, still include after the step of control stopper loss of electricity:
when a normal rotation braking signal is received, the brake is controlled to be powered on and the wind indicator coil is controlled to be powered off, so that the iron blocking sheet is released and reset;
when the iron blocking sheet is released and reset and receives a brake signal sent by the frequency converter, the brake is controlled to lose power so as to enable the brake to enter a brake state.
Further, behind the weather vane coil actuation fender iron sheet, still include after the step of control stopper loss of electricity:
when an emergency braking signal is received, the brake is controlled to be powered on and the wind indicator coil is controlled to be powered off, so that the iron blocking sheet is released and reset;
and after the iron blocking sheet is released and reset, the brake is controlled to lose power, so that the brake enters a brake state.
Further, behind the weather vane coil actuation fender iron sheet, the step of control stopper power loss still includes:
after the wind vane coil attracts the iron blocking sheet, the brake and the wind vane coil are sequentially controlled to be powered off.
Further, behind the weather vane coil actuation fender iron sheet, still include after controlling the step that stopper loses the electricity and weather vane coil loses the electricity in proper order:
when a normal rotation braking signal is received, controlling the brake to be electrified so as to release and reset the iron blocking sheet;
when the iron blocking sheet is released and reset and receives a brake signal sent by the frequency converter, the brake is controlled to lose power so as to enable the brake to enter a brake state.
Further, after the release of blocking iron piece resets and receives the band-type brake signal that the converter sent, control stopper loses the electricity to the step that makes the stopper get into the band-type brake state includes:
when the iron blocking sheet is released and reset and receives a brake signal sent by the frequency converter for a first preset time, the brake is controlled to be powered off, so that the brake enters a brake state.
Further, behind the weather vane coil actuation fender iron sheet, still include after controlling the step that stopper loses the electricity and weather vane coil loses the electricity in proper order:
when an emergency braking signal is received, controlling the brake to be electrified so as to release and reset the iron blocking sheet;
and after the iron blocking sheet is released and reset, the brake is controlled to lose power so as to enable the brake to enter a contracting brake state.
In order to achieve the above object, the present invention further provides a rotary power loss anti-lock system, comprising:
the first brake power-on module is used for controlling the brake to be powered on when the slewing is started so as to switch the brake to be in an open brake state;
the first weather vane coil power-on module is used for controlling the weather vane coil to be powered on after the brake keeps an open state so as to enable the weather vane coil to attract the iron blocking piece;
the first power-off module is used for controlling the brake to be powered off after the weather vane coil attracts the iron blocking piece;
and the first braking module is used for controlling the frequency converter to reduce the output frequency to be within a preset frequency threshold range when the power supply is powered off so as to enable the motor to enter a braking state to brake the slewing mechanism.
In order to achieve the above object, the present invention further provides a tower crane, which includes a wind vane coil, a stopper, a brake, a frequency converter, a motor, a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the slewing loss-of-power anti-lock method as described above.
To achieve the above object, the present invention further provides a computer readable storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the steps of the swing power loss anti-lock method as described above.
According to the rotary power-loss anti-lock method and system, the tower crane and the computer readable storage medium, when the rotary crane is started, the brake is controlled to be powered on, so that the brake is switched to be in an open brake state; after the brake keeps an open state, the weather vane coil is controlled to be electrified so that the weather vane coil attracts the iron blocking piece; after the weather vane coil attracts and closes the iron blocking sheet, the brake is controlled to lose power; when the power supply is powered off, the frequency converter is controlled to reduce the output frequency to be within the range of the preset frequency threshold value, so that the motor enters a braking state to brake the slewing mechanism. And in a braking state, part of mechanical energy of the motor is converted into electric energy to be fed back to a bus of the frequency converter, the normal operation of the frequency converter is maintained until the electric energy of the frequency converter is exhausted, and part of mechanical energy is consumed along with the inertial motion of the swing mechanism. Because a part of mechanical energy of the motor is converted into electric energy to be consumed by the frequency converter, only a part of mechanical energy of the motor is used for the consumption of the inertial motion of the swing mechanism, so that the inertial motion time of the swing mechanism is reduced, the parking distance is greatly reduced, slow soft parking is realized, and the danger possibly brought by immediately locking a parking mode is avoided.
Drawings
FIG. 1 is a schematic flow chart of a first embodiment of a rotary power loss anti-lock braking method according to the present invention;
FIG. 2 is a schematic flow chart of a second embodiment of a rotary power loss anti-lock method according to the present invention;
FIG. 3 is a schematic flow chart of a third embodiment of a rotary power loss anti-lock method according to the present invention;
FIG. 4 is a schematic flow chart of a fourth embodiment of a rotary power loss anti-lock method according to the present invention;
FIG. 5 is a schematic flow chart diagram illustrating a fifth exemplary embodiment of a rotary loss of power antilock method of the present invention;
FIG. 6 is a schematic flow chart diagram illustrating a rotary loss of lock braking system according to a sixth embodiment of the present invention;
FIG. 7 is a functional block diagram of a rotary power loss anti-lock system according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The tower crane in each embodiment of the invention comprises a weathercock coil, a stop sheet, a brake, a frequency converter, a motor, a communication module, a memory, a processor and the like, wherein the frequency converter is connected with the motor. It will be appreciated by those skilled in the art that the tower crane may also include more or fewer components than illustrated, or some components may be combined, or a different arrangement of components. The processor is respectively connected with the memory and the communication module, the memory stores computer programs, and the computer programs are executed by the processor at the same time.
And the communication module can be connected with external equipment through a network. The communication module can receive data sent by external equipment, and can also send data, instructions and information to the external equipment, wherein the external equipment can be equipment such as a base station, other tower cranes, a mobile phone, a tablet computer, a notebook computer, a desktop computer and the like.
And a memory operable to store the software program and various data. The memory may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function (determining an inner packing box size parameter of the accessory according to the size parameter and the packing amount of the accessory), and the like; the storage data area may store data or information created from use of the tower crane, or the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor is a control center of the tower crane, is connected with various parts of the whole tower crane by various interfaces and lines, comprises a wind vane coil, a brake, a frequency converter, a motor and the like, executes various functions and processing data of the tower crane by running or executing software programs and/or modules stored in the memory and calling the data stored in the memory, thereby carrying out the integral monitoring on the tower crane. The processor may include one or more processing units and may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor.
Although not shown in fig. 1, the tower crane may further include a circuit control module, where the circuit control module is used for being connected to a mains supply to implement power control and ensure normal operation of other components.
It will be appreciated by those skilled in the art that the tower crane configuration shown in fig. 1 does not constitute a limitation of tower cranes and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
Various embodiments of the method of the present invention are presented in terms of the above-described hardware architecture.
Referring to fig. 1, in a first embodiment of a swing loss anti-lock method of the present invention, the swing loss anti-lock method includes the steps of:
step S10, when the rotation is started, controlling the brake to be electrified so as to switch the brake to be in an open state;
in this scheme, hang into non-zero gear position from zero gear position when tower crane driver operation gyration operating handle and trigger the gyration and start, perhaps tower crane driver operation gyration start button triggers the gyration and starts, can control the stopper and get electric, and the stopper gets electric back, can get into the state of opening the floodgate to rotation mechanism is in non-braking state, can carry out rotary motion.
Step S20, after the brake is kept in an open state, controlling the weather vane coil to be electrified so as to enable the weather vane coil to attract the iron blocking piece;
when the brake keeps an open brake state, the wind vane coil can be immediately controlled to be electrified so that the wind vane coil attracts the patch, and the patch attracts the patch from an initial position to the lower side of the brake. It should be noted that, in order to ensure that the brake is in the open brake state, before the wind vane coil is controlled to be powered on, the brake is controlled to maintain the open brake state for a first preset time, where the first preset time may be 1s or 3s, and the time is not limited herein. And controlling the weather vane coil to be electrified when the speed of the slewing mechanism is detected to be greater than or equal to a preset speed threshold value or when the slewing gear meets a preset gear condition, such as the gear reaches 3 gears.
Step S30, after the wind vane coil attracts and closes the iron blocking sheet, controlling the brake to lose power;
after the weather vane coil attracts the iron blocking piece, the brake is controlled to lose power, the brake can automatically fall when the brake loses power, and the brake cannot completely fall and is clamped by the iron blocking piece below the brake because the iron blocking piece is arranged below the brake, so that the brake cannot enter a brake state even if the brake loses power, and the brake cannot be carried out on the slewing mechanism.
In order to ensure that the iron blocking sheet is attracted by the weather vane coil to be positioned below the brake, the weather vane coil is kept electrified for preset time, and the brake is controlled to be powered off after the weather vane coil is electrified for preset time.
And S40, when the power supply is powered off, controlling the frequency converter to reduce the output frequency to be within a preset frequency threshold range so as to enable the motor to enter a braking state to brake the slewing mechanism.
When the tower crane is suddenly powered off, the power supply voltage can be suddenly reduced, and when the power supply voltage is detected to be reduced to a preset voltage threshold value, the power supply is determined to be powered off. Although the power is suddenly cut off, the wind vane coil is powered off, the wind vane coil loses the attraction capacity to the iron blocking sheet, when the brake is mutually constrained with the iron blocking sheet at the moment, the iron blocking sheet cannot reset, the brake cannot fall completely to enter a contracting brake state, the frequency converter can be controlled to reduce the output frequency to be within a preset frequency threshold range at the moment, the motor enters a braking state at the moment, partial mechanical energy of the motor is converted into electric energy to be fed back to a bus of the frequency converter under the braking state, the normal operation of the frequency converter is maintained until the electric energy of the frequency converter is exhausted, and partial mechanical energy is consumed along with the inertial motion of the swing mechanism. Because a part of mechanical energy of the motor is converted into electric energy to be consumed by the frequency converter, only a part of mechanical energy of the motor is used for inertial motion consumption of the slewing mechanism, so that the inertial motion time of the slewing mechanism is reduced, the parking distance is greatly reduced, slow soft parking is realized, and the danger possibly brought by immediately locking the parking mode is avoided.
When the device is started through rotation, the brake is controlled to be electrified, so that the brake is switched to be in an open state; after the brake keeps an open state, the weather vane coil is controlled to be electrified so that the weather vane coil attracts the iron blocking piece; after the weather vane coil attracts the iron blocking sheet, the brake is controlled to lose power; when the power supply is powered off, the frequency converter is controlled to reduce the output frequency to be within the range of the preset frequency threshold value, so that the motor enters a braking state to brake the slewing mechanism. And in the braking state, part of mechanical energy of the motor is converted into electric energy to be fed back to the bus of the frequency converter, the normal operation of the frequency converter is maintained until the electric energy of the frequency converter is exhausted, and part of mechanical energy is consumed along with the inertial motion of the slewing mechanism. Because a part of mechanical energy of the motor is converted into electric energy to be consumed by the frequency converter, only a part of mechanical energy of the motor is used for inertial motion consumption of the slewing mechanism, so that the inertial motion time of the slewing mechanism is reduced, the parking distance is greatly reduced, slow soft parking is realized, and the danger possibly brought by immediately locking the parking mode is avoided.
Further, referring to fig. 2, fig. 2 is a flowchart illustrating a second embodiment of the present invention according to the first embodiment of the present invention, where in the present embodiment, step S30 includes:
step S50, when a normal rotation braking signal is received, controlling the brake to be electrified and the wind indicator coil to be deenergized so as to release and reset the iron blocking sheet;
and S51, when the stop iron sheet is released and reset and receives a brake signal sent by the frequency converter, controlling the brake to lose power so as to enable the brake to enter a brake state.
In this embodiment, under the normal needs braking condition, the tower crane driver returns the gyration handle fender zero, trigger the normal braking signal of gyration, perhaps the tower crane driver presses normal gyration brake button in order to trigger the normal braking signal of gyration, when receiving the normal braking signal of gyration, can control the stopper and get electric, the stopper gets electric back, the stopper can lift, behind the weather vane coil loses the electricity, weather vane coil loses the adsorption energy loss to the stop iron piece, in addition the stopper lifts up also disappearance to the restraint of stop iron piece, the stop iron piece can release and reset, get back to the initial position.
The brake may be powered first, and the vane coil is powered off later, or the vane coil is powered off first and the brake is powered on, or the brake is powered on and the vane coil is powered off simultaneously. The order is not limited herein.
After the brake is electrified for a period of time, the period of time is related to a before-braking swing gear, the higher the swing gear is, namely the higher the swing speed of the before-braking swing mechanism is, the longer the period of time is, the lower the swing gear is, the lower the swing speed of the before-braking swing mechanism is, and the shorter the period of time is. Of course, the lower the rotation gear is, that is, the larger the rotation speed of the brake rotation mechanism is, the longer the time is, the higher the rotation gear is, the smaller the rotation speed of the rotation mechanism before braking is, the shorter the time is, the rotation speed of the rotation mechanism may drop to a certain value, and the frequency converter may send a brake signal.
After receiving a band-type brake signal sent by the frequency converter, the brake is controlled to lose power, so that the brake falls down again, and the brake can enter a band-type brake state because no iron blocking piece is arranged below the brake, and can carry out band-type brake on the swing mechanism, so that the swing mechanism is braked.
In order to ensure that when the speed of the slewing mechanism is reduced to 0 or a very small value before the brake brakes the slewing band-type brake, the brake is controlled to lose power after the iron blocking sheet is released and reset and receives a band-type brake signal sent by the frequency converter for a first preset time, the brake can enter a band-type brake state and can brake the slewing mechanism, and the balance arm and the crane arm are slightly or not shaken due to the fact that the speed of the slewing mechanism before the band-type brake is 0 or the speed is very low. The embodiment provides a braking strategy for the slewing mechanism after a normal braking signal is received.
Further, referring to fig. 3, fig. 3 is a third embodiment of the present invention, which is proposed according to the first embodiment of the present invention, and in the present embodiment, after step S30, the method includes:
step S61, when an emergency braking signal is received, controlling the brake to be powered on and the wind indicator coil to be powered off so as to release and reset the iron blocking sheet;
and S62, after the stop iron sheet is released and reset, controlling the brake to lose power so as to enable the brake to enter a brake state.
In this embodiment, when needing emergency braking, the tower crane driver can trigger emergency braking signal, and when receiving emergency braking signal, can control the stopper and get electric, the stopper gets electric back, and the stopper can lift, and the weather vane coil loses behind the electricity, and the weather vane coil loses the actuation ability of iron blocking piece, and in addition the stopper lifts up also disappearance to the restraint of iron blocking piece, and the iron blocking piece can release and reset, gets back to the initial position.
It should be noted that the brake may be powered first, and the vane coil is powered off later, or the vane coil is powered off first, and the brake is powered on, or the brake is powered on and the vane coil is powered off simultaneously. The order is not limited herein.
When the stop iron sheet is released and reset, the brake is immediately controlled to lose power so as to enable the brake to fall down, and the brake enters a band-type brake state because the stop iron sheet is not arranged below the brake, and immediately performs band-type brake on the slewing mechanism, thereby realizing the emergency brake on the slewing mechanism.
The embodiment provides an emergency braking strategy for the swing mechanism after receiving an emergency braking signal.
Further, referring to fig. 4, fig. 4 is a fourth embodiment of the present invention, which is proposed according to the first embodiment of the present invention, and in this embodiment, step S30 further includes:
and S31, after the wind vane coil attracts the iron blocking sheet, sequentially controlling the brake to be powered off and the wind vane coil to be powered off.
Because the weather vane coil keeps the state of being electrified for a long time, the service life of the weather vane coil can be greatly shortened. In this embodiment, when the brake is controlled to lose power, the brake falls down, the wind vane coil is controlled to lose power, and after the wind vane coil loses power, the adsorption capacity of the wind vane coil to the iron blocking sheet is lost, but because the brake forms restraint to the iron blocking sheet, the iron blocking sheet cannot reset at this moment.
According to the embodiment, after the brake loses power, the wind vane coil can be immediately controlled to lose power, so that the phenomenon that the service life of the wind vane coil is sharply reduced because the wind vane coil is always in a power-on state is avoided.
Further, referring to fig. 5, fig. 5 is a fifth embodiment of the present invention, which is proposed according to a fourth embodiment of the present invention, and in the present embodiment, after step S31, the method further includes:
step S52, when a normal rotation braking signal is received, controlling the brake to be electrified so as to release and reset the iron blocking sheet;
and S51, when the stop iron sheet is released and reset and receives a brake signal sent by the frequency converter, controlling the brake to lose power so as to enable the brake to enter a brake state.
In this embodiment, under the normal needs braking condition, the tower crane driver is with gyration handle fender zero return, trigger the normal braking signal of gyration, perhaps the tower crane driver presses normal gyration brake button in order to trigger the normal braking signal of gyration, when receiving the normal braking signal of gyration, because the arrester is electrified before the wind vane coil has lost the electricity, the adsorption energy of wind vane coil to the iron blocking piece loses, only need control the arrester to be electrified, the arrester is electrified after, the arrester can be lifted, the arrester also disappears to the restraint of iron blocking piece, the iron blocking piece can release and reset, get back to the initial position.
After the brake is electrified for a period of time, the period of time is related to a before-braking swing gear, the higher the swing gear is, namely, the higher the swing speed of the before-braking swing mechanism is, the longer the period of time is, the lower the swing gear is, the lower the swing speed of the before-braking swing mechanism is, and the shorter the period of time is. Of course, the lower the rotation gear is, that is, the larger the rotation speed of the brake rotation mechanism is, the longer the time is, the higher the rotation gear is, the smaller the rotation speed of the rotation mechanism before braking is, the shorter the time is, the rotation speed of the rotation mechanism may drop to a certain value, and the frequency converter may send a brake signal.
After receiving a band-type brake signal sent by the frequency converter, the brake is controlled to lose power, so that the brake falls down again, and the brake can enter a band-type brake state because no iron blocking piece is arranged below the brake, and can carry out band-type brake on the swing mechanism, so that the swing mechanism is braked.
In order to ensure that when the speed of the slewing mechanism is reduced to 0 or a very small value before the brake brakes the slewing band-type brake, the brake is controlled to lose power after the iron blocking sheet is released and reset and receives a band-type brake signal sent by the frequency converter for a first preset time, the brake can enter a band-type brake state and can brake the slewing mechanism, and the balance arm and the crane arm are slightly or not shaken due to the fact that the speed of the slewing mechanism before the band-type brake is 0 or the speed is very low.
Further, referring to fig. 6, fig. 6 is a sixth embodiment of the present invention, which is proposed according to the fourth embodiment of the present invention, and in this embodiment, after step S31, the method further includes:
step S62, when an emergency braking signal is received, controlling the brake to be electrified so as to release and reset the iron blocking sheet;
and S61, after the stop iron sheet is released and reset, controlling the brake to lose power so as to enable the brake to enter a brake state.
In this embodiment, when needing emergency braking, the tower crane driver can trigger emergency braking signal, and when receiving emergency braking signal, after the weather vane coil has lost the electricity, weather vane coil loses the actuation ability to the stop iron piece, only needs control stopper to receive the electricity, and after the stopper received the electricity, the stopper can be lifted, and the stopper lifts the restraint to the stop iron piece and disappears, and the stop iron piece can release and reset, gets back to initial position.
When the stop iron sheet is released and reset, the brake is immediately controlled to lose power so as to enable the brake to fall down, and the brake enters a band-type brake state because the stop iron sheet is not arranged below the brake, and immediately performs band-type brake on the slewing mechanism, thereby realizing the emergency brake on the slewing mechanism.
Referring to fig. 7, the present invention also provides a rotary power loss anti-lock system, comprising:
the brake power-on module 10 is used for controlling the brake to be powered on when the rotation is started so as to switch the brake to be in an open state;
the weather vane coil power-on module 20 is used for controlling the weather vane coil to be powered on after the brake keeps the opening state so as to enable the weather vane coil to attract the iron blocking sheet;
the power-off module 30 is used for controlling the brake to be powered off after the weather vane coil attracts the iron blocking sheet;
and the first braking module 40 is used for controlling the frequency converter to reduce the output frequency to be within a preset frequency threshold range when the power supply is powered off so as to enable the motor to enter a braking state to brake the slewing mechanism.
Further, gyration is lost electric anti-lock system still includes:
the first release resetting module 51 is used for controlling the brake to be powered on and the wind indicator coil to be powered off when receiving a rotation normal braking signal so as to release and reset the iron blocking sheet;
and the second braking module 52 is configured to control the brake to lose power when the stop iron sheet is released and reset and receives a brake signal sent by the frequency converter, so that the brake enters a brake state.
Further, gyration power loss anti-lock braking system still includes:
the second release resetting module 61 is used for controlling the brake to be powered on and the wind indicator coil to be powered off when the emergency braking signal is received, so that the iron blocking sheet is released and reset;
and the third braking module 62 is used for controlling the brake to lose power after the stop iron sheet is released and reset so as to enable the brake to enter an internal contracting brake state.
Further, the power-off module 30 is also used for controlling the brake and the wind vane to be powered off in sequence after the wind vane coil attracts the iron blocking sheet.
Further, the first release resetting module 51 is further configured to control the brake to be powered on when receiving a normal braking signal for rotation, so that the iron stop sheet is released and reset.
Further, gyration is lost electric anti-lock system still includes:
the third releasing and resetting module 61 is further configured to control the brake to lose power after the iron blocking sheet is released and reset and receives the first preset time of the brake signal sent by the frequency converter, so that the brake enters a brake state.
Further, the second release resetting module 61 is further configured to control the brake to be powered on when receiving the emergency braking signal, so that the stop iron sheet is released and reset.
The invention also proposes a computer-readable storage medium on which a computer program is stored. The computer-readable storage medium may be a Memory in the tower crane, or may be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, and includes several pieces of information for enabling the tower crane to perform the method according to the embodiments of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (10)
1. A rotation power loss anti-lock method is characterized by comprising the following steps:
when the rotation is started, the brake is controlled to be electrified so as to switch the brake to be in an open state;
after the brake keeps an open state, the weather vane coil is controlled to be electrified so that the weather vane coil attracts and closes the iron blocking piece;
after the weather vane coil attracts the iron blocking sheet, the brake is controlled to lose power;
when the power supply is powered off, the frequency converter is controlled to reduce the output frequency to be within the range of the preset frequency threshold value, so that the motor enters a braking state to brake the slewing mechanism.
2. The method for preventing the loss of power during rotation according to claim 1, wherein after the step of controlling the loss of power of the brake after the weather vane coil attracts the iron blocking sheet, the method further comprises the following steps:
when a normal rotation braking signal is received, the brake is controlled to be powered on and the wind indicator coil is controlled to be powered off, so that the iron blocking sheet is released and reset;
when the iron blocking sheet is released and reset and receives a brake signal sent by the frequency converter, the brake is controlled to lose power, so that the brake enters a brake state.
3. The rotary power-off anti-lock method according to claim 1, wherein after the weather vane coil attracts and closes the iron blocking sheet, the step of controlling the brake to be powered off further comprises the following steps:
when an emergency braking signal is received, the brake is controlled to be powered on and the wind indicator coil is controlled to be powered off, so that the iron blocking sheet is released and reset;
and after the iron blocking sheet is released and reset, the brake is controlled to lose power so as to enable the brake to enter a contracting brake state.
4. The method for preventing the loss of power during the revolution according to claim 1, wherein the step of controlling the loss of power of the brake after the weathercock coil attracts the iron blocking sheet further comprises:
after the wind vane coil attracts the iron blocking sheet, the brake and the wind vane coil are sequentially controlled to be powered off.
5. The rotary power-off anti-lock method according to claim 4, wherein after the wind vane coil attracts the iron blocking sheet, the steps of sequentially controlling the brake power-off and the wind vane coil power-off further comprise:
when a normal rotation braking signal is received, controlling the brake to be electrified so as to release and reset the iron blocking sheet;
when the iron blocking sheet is released and reset and receives a brake signal sent by the frequency converter, the brake is controlled to lose power, so that the brake enters a brake state.
6. The rotary power-off anti-lock method according to claim 2 or 5, wherein the step of controlling the brake to be powered off after the iron blocking sheet is released and reset and receives a brake signal sent by the frequency converter so that the brake enters a brake state comprises:
when the iron blocking sheet is released and reset and receives a brake signal sent by the frequency converter for a first preset time, the brake is controlled to be powered off, so that the brake enters a brake state.
7. The rotary power-off anti-lock method according to claim 4, wherein after the wind vane coil attracts the iron blocking sheet, the steps of sequentially controlling the brake power-off and the wind vane coil power-off further comprise:
when an emergency braking signal is received, controlling the brake to be electrified so as to release and reset the iron blocking sheet;
and after the iron blocking sheet is released and reset, the brake is controlled to lose power, so that the brake enters a brake state.
8. A rotary power loss anti-lock system, comprising:
the first brake power-on module is used for controlling the brake to be powered on when the slewing is started so as to switch the brake to be in an open brake state;
the first weather vane coil power-on module is used for controlling the weather vane coil to be powered on after the brake keeps an open brake state so as to enable the weather vane coil to attract the iron blocking sheet;
the first power-off module is used for controlling the brake to be powered off after the weather vane coil attracts and closes the iron blocking piece;
and the first braking module is used for controlling the frequency converter to reduce the output frequency to be within a preset frequency threshold range when the power supply is powered off so as to enable the motor to enter a braking state to brake the slewing mechanism.
9. A tower crane comprising a weathervaning coil, a damper, a brake, a frequency converter, a motor, a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of a slewing loss of power anti-lock method as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the swing loss anti-lock method according to any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111654005.2A CN114408750B (en) | 2021-12-30 | 2021-12-30 | Rotary power-loss anti-lock method and system, tower crane and storage medium |
| PCT/CN2022/089771 WO2023123774A1 (en) | 2021-12-30 | 2022-04-28 | Rotary power failure anti-lock method and system, tower crane, and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111654005.2A CN114408750B (en) | 2021-12-30 | 2021-12-30 | Rotary power-loss anti-lock method and system, tower crane and storage medium |
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| Publication Number | Publication Date |
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| CN114408750A CN114408750A (en) | 2022-04-29 |
| CN114408750B true CN114408750B (en) | 2022-11-29 |
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| CN202111654005.2A Active CN114408750B (en) | 2021-12-30 | 2021-12-30 | Rotary power-loss anti-lock method and system, tower crane and storage medium |
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| Country | Link |
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| CN (1) | CN114408750B (en) |
| WO (1) | WO2023123774A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115650068B (en) * | 2022-10-31 | 2023-09-29 | 徐州建机工程机械有限公司 | Novel tower crane rotary braking and wind vane control system and method |
| CN115676655A (en) * | 2022-10-31 | 2023-02-03 | 徐州建机工程机械有限公司 | Tower crane rotation amplitude-changing all-in-one machine and control method thereof |
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| US4067447A (en) * | 1975-12-29 | 1978-01-10 | Goss John B | Safety device for cranes |
| CN202296925U (en) * | 2011-09-15 | 2012-07-04 | 浙江省建设机械集团有限公司 | Automatic opening device for rotary normally closed type brake of tower crane |
| CN202657854U (en) * | 2012-04-25 | 2013-01-09 | 抚顺永茂建筑机械有限公司 | Crane rotary brake control system |
| CN215048254U (en) * | 2021-04-08 | 2021-12-07 | 苏州通润驱动设备股份有限公司 | Wind vane brake mounted on tower crane rotary motor |
| CN113979339A (en) * | 2021-12-01 | 2022-01-28 | 武汉港迪技术股份有限公司 | Wind vane control circuit and control method of tower crane |
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| DE19500545A1 (en) * | 1995-01-11 | 1996-07-18 | Teves Gmbh Alfred | Motor vehicle ABS electronically controlled braking system brake actuation drive method |
| CN201891782U (en) * | 2010-12-09 | 2011-07-06 | 安徽创新电磁离合器有限公司 | Electromagnetic power lost brake with electric weather cock |
| CN202107461U (en) * | 2011-06-07 | 2012-01-11 | 四川宜宾力源电机有限公司 | Weather vane for brake device of rotary motor of tower crane |
| CN204324768U (en) * | 2014-12-04 | 2015-05-13 | 贵州永安电机有限公司 | The novel electrical motor for tower machine swing type mechanism and drg weathercock unitized construction |
| CN211769914U (en) * | 2020-03-13 | 2020-10-27 | 四川鑫力源特种电机有限责任公司 | Braking device for rotary motor of tower crane |
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2021
- 2021-12-30 CN CN202111654005.2A patent/CN114408750B/en active Active
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- 2022-04-28 WO PCT/CN2022/089771 patent/WO2023123774A1/en unknown
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4067447A (en) * | 1975-12-29 | 1978-01-10 | Goss John B | Safety device for cranes |
| CN202296925U (en) * | 2011-09-15 | 2012-07-04 | 浙江省建设机械集团有限公司 | Automatic opening device for rotary normally closed type brake of tower crane |
| CN202657854U (en) * | 2012-04-25 | 2013-01-09 | 抚顺永茂建筑机械有限公司 | Crane rotary brake control system |
| CN215048254U (en) * | 2021-04-08 | 2021-12-07 | 苏州通润驱动设备股份有限公司 | Wind vane brake mounted on tower crane rotary motor |
| CN113979339A (en) * | 2021-12-01 | 2022-01-28 | 武汉港迪技术股份有限公司 | Wind vane control circuit and control method of tower crane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114408750A (en) | 2022-04-29 |
| WO2023123774A1 (en) | 2023-07-06 |
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