CN207293960U - A kind of lifting mechanism using frequency-variable controller - Google Patents
A kind of lifting mechanism using frequency-variable controller Download PDFInfo
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- CN207293960U CN207293960U CN201721128715.0U CN201721128715U CN207293960U CN 207293960 U CN207293960 U CN 207293960U CN 201721128715 U CN201721128715 U CN 201721128715U CN 207293960 U CN207293960 U CN 207293960U
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- frequency
- power control
- control cabinet
- electric motor
- raising power
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Abstract
The utility model discloses a kind of lifting mechanism using frequency-variable controller, for in tower ground jack, including raising power control cabinet, and the lifting electric motor being electrically connected with raising power control cabinet, and it is electrically connected with raising power control cabinet, the liquid braking device being connected in parallel with lifting electric motor, and it is electrically connected with raising power control cabinet, the lifting electric motor wind turbine being connected in parallel with liquid braking device, the frequency converter using open loop control lifting electric motor is equipped with the raising power control cabinet, the raising power control cabinet also and is connected with distribution box, raising resistor box and slewing motor, the lifting electric motor is mouse cage variable-frequency motor；This greatly reduces the maintenance of equipment using the lifting mechanism of frequency-variable controller, reduces the pollution to power grid, compared with traditional industrial frequency control tower crane, reduce mechanical loss, contracting brake mechanism reliable in action, high speed enhanced feature shorten the work period, improve work efficiency.
Description
Technical field
The utility model belongs to more particularly to a kind of lifting mechanism using frequency-variable controller.
Background technology
With the continuous development of Building Trade in China, the continuous improvement of construction machineization level, the manufacture matter to tower crane
The requirement of amount and its technical level is also higher and higher.Control mode, control system used by each transmission mechanism of tower crane
Technical merit, the operability of user and the maintainable technical merit and class for substantially just embodying whole tower crane.And
In these mechanisms, mostly important is also that most technology is representational is lifting mechanism, it is controlled, and power is maximum, speed governing model
Enclose it is most wide, be out of order after maintenance difficulty it is also maximum.And the system will in the size of mechanical shock caused by speed-change process
Directly affect the fatigue damage degree of tower crane structural member.
In order to improve its performance, domestic each host manufacturer has spent many works in the speed regulating control technology of lifting mechanism
Husband, has obtained significant progress.See on the whole, it is most to be driven using traditional single motor, with band eddy-current brake
Based on the winding motor of device and the scheme of multipolar dynamo speed governing.These traditional speed-regulating schemes, to reach wider speed governing
Scope, its approach is nothing more than high-power, wide speed regulating range nonstandard motor is manufactured and designed, such as：Using with the more of eddy-current brake
Pole winding motor makes big very poor multispeed electric machine etc..Due to the required higher speed governing requirement of Lift Mechanism in Power Hoist not only
More quality control problem is brought to motor production firm, and also increases control loop and the manufacture cost of motor,
Reduce system reliability.What is more, and as crane capacity requirement of the user to tower crane is increasing, traditional control method is
Unable to do what one wishes through increasingly feeling, the whether realizability of above-mentioned technology, it manufactures cost and performance etc.
There is also some problems.
Utility model content
The purpose of this utility model is to provide a kind of maintenance for greatly reducing equipment, reduces the pollution to power grid, with
Traditional industrial frequency control tower crane is compared, and reduces mechanical loss, contracting brake mechanism reliable in action, and high speed enhanced feature shortens work week
Phase, the lifting mechanism using frequency-variable controller improved work efficiency.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is：
A kind of lifting mechanism using frequency-variable controller, in tower ground jack, including raising power control cabinet, and and raising
The lifting electric motor that power control cabinet is electrically connected, and the hydraulic pressure for being electrically connected, being connected in parallel with lifting electric motor with raising power control cabinet
Brake, and the lifting electric motor wind turbine for being electrically connected, being connected in parallel with liquid braking device with raising power control cabinet, the raising electricity
Control cabinet in be equipped with using open loop control lifting electric motor frequency converter, the raising power control cabinet also and be connected with distribution box, rise
It is mouse cage variable-frequency motor to rise resistor box and slewing motor, the lifting electric motor.
Preferably, the PLC frequency control modules for being used for connecting frequency converter are equipped with raising power control cabinet.
Preferably, the tower ground jack is also equipped with illumination breaker.
Preferably, the tower ground jack is also equipped with automatic air-break switch.
Preferably, the tower ground jack has further included swing mechanism and jib lubbing mechanism.
The utility model has the technical effect that following aspect：Controlled using lifting special converter open loop general
Logical mouse cage variable-frequency motor, zero-turn speed can provide 150% moment of torsion under open loop case, and exclusive band-type brake controls application program,
The method that braking is combined using DC injection braking, regenerative braking and mechanical braking, ensures that weight is not in lifting process
Slip the generation of hook phenomenon.
Brief description of the drawings
Fig. 1 is a kind of circuit block diagram of lifting mechanism using frequency-variable controller of the utility model；
Fig. 2 is that a kind of PLC of lifting mechanism using frequency-variable controller of the utility model controls electrical schematic diagram.
Embodiment
In the present embodiment, it is to be understood that term " centre ", " on ", " under ", " top ", " right side ", " left end ",
" top ", " back side ", " middle part ", etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, only
Be for the ease of describing the utility model, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
In addition, the connection between component or fixed form if not otherwise specified in this embodiment, it is connected or solid
It can be to be fixed by bolt commonly used in the prior art or pin is fixed to determine mode, or the mode such as axis pin connection, therefore, at this
No longer it is described in detail in embodiment.
Embodiment
As shown in figs. 1-2, a kind of lifting mechanism using frequency-variable controller, in tower ground jack, including raising
Power control cabinet, and with raising power control cabinet be electrically connected lifting electric motor, and with raising power control cabinet be electrically connected and lifting electric motor
The liquid braking device being connected in parallel, and the lifting electric motor for being electrically connected, being connected in parallel with liquid braking device with raising power control cabinet
Wind turbine, the interior frequency converter being equipped with using open loop control lifting electric motor of the raising power control cabinet, the raising power control cabinet is also
And distribution box, raising resistor box and slewing motor are connected with, the lifting electric motor is mouse cage variable-frequency motor, in raising power control cabinet
Equipped with the PLC frequency control modules for connecting frequency converter, the tower ground jack be also equipped with illumination breaker, described tower
Treasure is also equipped with automatic air-break switch, and the tower ground jack has further included swing mechanism and jib lubbing mechanism.
This programme employs programmable controller and carries out central control, eliminate the substantial amounts of centre for logic control after
Electric appliance, so as to substantially increase the reliability of whole system, also makes the positioning of failure and excludes more convenient.
The control mode of programmable controller is as follows：
1st, be sent into by cable can for all signals (including the control signal that sends of joint action table and various alarm signals)
The input terminal of programmable controller, such as a certain signal are connected, and the correspondence indicator light of programmable controller input side is bright.User can be with
Learn whether the work of a certain switch is normal rapidly by the light on and off of viewing lamp；
2nd, each contactor in system is all directly controlled by an intermediate relay, and relay among each
Device is all attached directly on the lead-out terminal of programmable controller, the break-make situation of each lead-out terminal of programmable controller
It can judge from the light on and off of the indicator light of outlet side.Therefore user only needs to be observed according to the action table of comparisons provided in annex
The break-make of each lead-out terminal --- each intermediate relay --- each contactor of programmable controller is come rapid
Learn that element is out of joint.
After electric-control system starts successfully, you can carry out the operation of each mechanism.Two manipulators of joint action table are used during operation
Handle and various buttons.When using operation handle, it should first use forefinger and middle finger that toward pull-up, the sliding shoe in handle head is released zero
Position self-locking, can promote freely.The sound and light alarm signal that electric-control system is sent is please noted that during operation.In general, when acousto-optic report
Electric-control system can make reacting accordingly automatically when alert signal occurs (such as forbids the movement of certain mechanism, certain direction deceleration of motion
Deng).
Descending operation mode is as follows：
Controlled by handle on right joint action table, toward lira during rising, toward extrapolation during decline；Raising and lowering each point five
Class, corresponding to five kinds of speed.
The utility model has the technical effect that following aspect：Controlled using lifting special converter open loop general
Logical mouse cage variable-frequency motor, zero-turn speed can provide 150% moment of torsion under open loop case, and exclusive band-type brake controls application program,
The method that braking is combined using DC injection braking, regenerative braking and mechanical braking, ensures that weight is not in lifting process
Slip the generation of hook phenomenon.
The above, is only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any change or replacement expected without creative work, should be covered within the scope of the utility model.
Claims (5)
1. a kind of lifting mechanism using frequency-variable controller, in tower ground jack, including raising power control cabinet, and with raising electricity
Control the lifting electric motor that cabinet is electrically connected, and the hydraulic pressure system for being electrically connected, being connected in parallel with lifting electric motor with raising power control cabinet
Dynamic device, and the lifting electric motor wind turbine for being electrically connected, being connected in parallel with liquid braking device with raising power control cabinet, it is characterised in that：
It is equipped with the frequency converter using open loop control lifting electric motor in the raising power control cabinet, the raising power control cabinet also and is connected with
Distribution box, raising resistor box and slewing motor, the lifting electric motor are mouse cage variable-frequency motor.
2. the lifting mechanism according to claim 1 using frequency-variable controller, it is characterised in that：It is equipped with raising power control cabinet
For connecting the PLC frequency control modules of frequency converter.
3. the lifting mechanism according to claim 2 using frequency-variable controller, it is characterised in that：The tower ground jack is also
Equipped with illumination breaker.
4. the lifting mechanism according to claim 3 using frequency-variable controller, it is characterised in that：The tower ground jack is also
Equipped with automatic air-break switch.
5. the lifting mechanism according to claim 4 using frequency-variable controller, it is characterised in that：The tower ground jack is also
Include swing mechanism and jib lubbing mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721128715.0U CN207293960U (en) | 2017-09-05 | 2017-09-05 | A kind of lifting mechanism using frequency-variable controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721128715.0U CN207293960U (en) | 2017-09-05 | 2017-09-05 | A kind of lifting mechanism using frequency-variable controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207293960U true CN207293960U (en) | 2018-05-01 |
Family
ID=62445531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721128715.0U Active CN207293960U (en) | 2017-09-05 | 2017-09-05 | A kind of lifting mechanism using frequency-variable controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207293960U (en) |
-
2017
- 2017-09-05 CN CN201721128715.0U patent/CN207293960U/en active Active
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