CN204111213U - Swing type mechanism - Google Patents
Swing type mechanism Download PDFInfo
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- CN204111213U CN204111213U CN201420452090.3U CN201420452090U CN204111213U CN 204111213 U CN204111213 U CN 204111213U CN 201420452090 U CN201420452090 U CN 201420452090U CN 204111213 U CN204111213 U CN 204111213U
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Abstract
The utility model relates to a kind of swing type mechanism, especially a kind ofly meets the tendency for the swing type mechanism in tower crane field.The utility model provides one can infinite speed variation, start and braking procedure steady, can reduce and crane arm and tower body are impacted, and structure is simply, the swing type mechanism that cost is low.Comprise alternating-current motor/AC motor and rotary reducer, also comprise electromagnetic eddy power-transfer clutch, electromagnetic whirlpool brake, middle armature, electric control system and operator's station.Being achieved the level and smooth startup of middle armature when starting by the combined action of electromagnetic eddy power-transfer clutch and electromagnetic whirlpool brake, avoiding the inertia impact in start-up course; When revolving structure is braked, utilize electromagnetic eddy power-transfer clutch and electromagnetism whirlpool drg, extend the braking time of swing type mechanism, realize swing type mechanism by the smooth transition of state of kinematic motion to state of kinematic motion, impact to crane arm and tower body when reducing braking.
Description
Technical field
The utility model relates to a kind of swing type mechanism, especially a kind ofly meets the tendency for the swing type mechanism in tower crane field.
Background technology
Tower type crane slewing gear has following feature: swing type mechanism be tower machine inertia impact impact the most direct transmission device, jib is longer, end hang carry larger, rotor inertia is larger, and inertia impact is larger.Because tower type crane slewing gear is the entirety dragging tower crane top, during work, General Requirements will will reach full speed running about 7 seconds, also stopping that will be stable at about 7 seconds, revolution start and parking inertia large, particularly be in operation stop time, although it is out of service that turning motor loses power supply, but tower machine forearm, postbrachium still continues speed reducing rotation and runs under huge revolution effect of inertia, short time causes and hangs the sliding more destination of thing, and cannot accurately fall, this just requires that tower machine operating personal rule of thumb will shift to an earlier date the continuous crawl of a segment distance and stop, reverse-starting braking operation is in place even.
In prior art, the startup of swing type mechanism adopts step speed regulation control mechanism and fluid coupling to control, and causes complete machine to rock impacting large, and after motor power-off, to slip the car time long for jib, and in place very difficult, rotary reducer easily damages.And there is following technical matters in the swing type mechanism of tower crane: reduction gearbox output shaft often occurs and twists off fault, have a strong impact on the normal operation of this equipment, add maintenance cost and frequency of maintenance; Start serious not steady, impact comparatively large to crane arm and tower body, the safe in operation of steel structure in serious threat, reduces the service life of equipment itself; When stopping, tower body twisting is serious, and with jitter phenomenon, makes tower crane driver obviously feel to run not steady, reliably dangerous; Although and variable frequency control can overcome the above problems, cost is very high, and control complicated, technical merit requires high.Therefore also there is no a kind of startup and braking procedure in prior art steadily, can reduce and crane arm and tower body are impacted, and structure is simple, the swing type mechanism that cost is low.
Utility model content
Technical problem to be solved in the utility model is to provide one can infinite speed variation, start and braking procedure steady, can reduce and crane arm and tower body are impacted, and structure is simply, the swing type mechanism that cost is low.
For solving the problems of the technologies described above, the swing type mechanism that the utility model adopts, comprise alternating-current motor/AC motor and rotary reducer, described alternating-current motor/AC motor and rotary reducer are in transmission connection, and also comprise electromagnetic eddy power-transfer clutch, electromagnetic whirlpool brake, middle armature, electric control system and operator's station; Middle armature one end is connected with rotary reducer, and the other end is connected with the output shaft of alternating-current motor/AC motor by electromagnetic eddy power-transfer clutch, and described electromagnetic whirlpool brake is connected with middle armature; Described operator's station is electrically connected with electric control system, and described electromagnetic eddy power-transfer clutch is electrically connected with the control current output terminal of electric control system, and described electromagnetic whirlpool brake is electrically connected with the control current output terminal of electric control system.
Further, described middle armature is made up of two cylinders that opening direction is contrary, and the opening direction of one of them cylinder is towards alternating-current motor/AC motor, and the opening direction of another cylinder is towards rotary reducer; Described electromagnetic eddy power-transfer clutch is arranged on opening towards in the cylinder of alternating-current motor/AC motor, and described electromagnetic whirlpool brake is arranged on opening towards in the cylinder of rotary reducer.
Further, also comprise slewing limiter, described slewing limiter and rotary reducer are synchronized with the movement, and slewing limiter is electrically connected with electric control system.
Further, also comprise weathercock drg, described weathercock drg is arranged on the outer wall of middle armature, and slewing limiter is electrically connected with electric control system.
The beneficial effects of the utility model are: when revolving structure starts, electromagnetic eddy power-transfer clutch is utilized load to be added to gradually on alternating-current motor/AC motor on the one hand, electromagnetic whirlpool brake is first utilized to limit the initial angle acceleration/accel of middle armature on the other hand, and then progressively untie restriction, the time that swing type mechanism starts is extended by the combined action of above electromagnetic eddy power-transfer clutch and electromagnetic whirlpool brake, revolving structure is made steadily to accelerate to the normal work speed of setting by quiescence, achieve the level and smooth startup of middle armature, avoid the inertia impact in start-up course; When revolving structure is braked, electromagnetic eddy power-transfer clutch is first utilized to be connected with load by alternating-current motor/AC motor on the one hand, the function of alternating current dynamo regenerative braking is utilized to brake swing type mechanism, progressively strengthen the lock torque of electromagnetism whirlpool drg on the other hand, extend the braking time of swing type mechanism, realize swing type mechanism by the smooth transition of state of kinematic motion to state of kinematic motion, impact to crane arm and tower body when reducing braking.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Parts, position and numbering in figure: alternating-current motor/AC motor 1, rotary reducer 2, electromagnetic eddy power-transfer clutch 3, electromagnetic whirlpool brake 4, middle armature 5, electric control system 6, weathercock drg 7, slewing limiter 8, operator's station 9.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, swing type mechanism of the present utility model, comprise alternating-current motor/AC motor 1 and rotary reducer 2, described alternating-current motor/AC motor 1 is in transmission connection with rotary reducer 2, also comprises electromagnetic eddy power-transfer clutch 3, electromagnetic whirlpool brake 4, middle armature 5, electric control system 6 and operator's station 9; Middle armature 5 one end is connected with rotary reducer 2, and the other end is connected with the output shaft of alternating-current motor/AC motor 1 by electromagnetic eddy power-transfer clutch 3, and described electromagnetic whirlpool brake 4 is connected with middle armature 5; Described operator's station 9 is electrically connected with electric control system 6, and described electromagnetic eddy power-transfer clutch 3 is electrically connected with the control current output terminal of electric control system 6, and described electromagnetic whirlpool brake 4 is electrically connected with the control current output terminal of electric control system 6.The moment acted on alternating-current motor/AC motor 1 due to armature 5 middle when the electric current on electromagnetic eddy power-transfer clutch 3 is larger is larger, and the lock torque that electromagnetic whirlpool brake 4 acts on middle armature 5 when the electric current on electromagnetic whirlpool brake 4 is larger is also larger.Therefore when swing type mechanism starts, first connect the excitation source of electromagnetic eddy power-transfer clutch 3 and increase its electric current gradually, until be maximum during proceed-to-send, meanwhile, reducing the electric current of electromagnetic whirlpool brake 4 gradually, until be zero during proceed-to-send.In the process that the electric current of electromagnetic eddy power-transfer clutch 3 progressively strengthens, the load passing to alternating-current motor/AC motor 1 by middle armature 5 progressively increases from small to large, instead of jumps to fully loaded state by zero within the extremely short time, therefore little to the inertia impact of equipment.The electric current of starting stage electromagnetic whirlpool brake 4 started at swing type mechanism is maximum, the speed of middle armature 5 can be limited, prevent middle armature 5 high speed rotating under the drive of motor, cause the impact to inertia load, and then progressively reduce its electric current, reduce its brake action to middle armature 5, the rotating speed of middle armature 5 is made progressively to increase but not sharply increase at short notice, therefore under the combined action of electromagnetic eddy power-transfer clutch 3 and electromagnetic whirlpool brake 4, the total staring torque acted on middle armature 5 progressively increases, middle armature 5 can be started very smoothly, by quiescence smooth transition to steady-state operation speed, in start-up course, the cireular frequency of middle armature 5 increases gradually, and the total staring torque like this by controlling middle armature 5 realizes infinite speed variation when swing type mechanism starts.Electric control system 6 is used for controlling the size of current of electromagnetic eddy power-transfer clutch 3 and electromagnetic whirlpool brake 4.During concrete enforcement, the size of electric current can be formulated according to the speed of condition of loading and cireular frequency change.First allow alternating-current motor/AC motor 1 power-off when swing type mechanism is braked, then connect the power supply of electromagnetic whirlpool brake 4, and progressively increase the electric current of electromagnetic whirlpool brake 4 from small to large, meanwhile, reduce the electric current to zero of electromagnetic eddy power-transfer clutch 3 gradually.The lock torque that the electric current progressively increasing electromagnetic whirlpool brake 4 from small to large can make electromagnetic whirlpool brake 4 be added on middle armature 5 progressively increases, the direction of the angular acceleration of the middle armature 5 be connected with load is like this contrary with the direction of cireular frequency, its absolute value also progressively increases, and the cireular frequency of middle armature 5 is progressively reduced; Maximum at the electric current of the starting stage electromagnetic eddy power-transfer clutch 3 of braking, now the output shaft of alternating current dynamo is connected with middle armature 5 completely, due to the regenerative braking effect of alternating current dynamo, will produce lock torque to middle armature 5, the lock torque that the reduction along with electric current acts on middle armature 5 also reduces gradually.Be the regenerative braking moment braking relying on alternating current dynamo when zero at starting stage electromagnetic whirlpool brake 4 electric current, the regenerative braking of alternating current dynamo is a pulsation-free process, physical shock is little, but lock torque is little, in order to complete the braking of swing type mechanism within reasonable time, therefore the electric current by progressively increasing electromagnetic whirlpool brake 4 progressively increases lock torque, under the combined action of electromagnetic eddy power-transfer clutch 3 and electromagnetic whirlpool brake 4, the total braking force square finally acting on swing type mechanism progressively increases.Therefore in whole braking procedure, the cireular frequency of swing type mechanism progressively reduces, the infinite speed variation of braking procedure is carried out by controlling total braking force square, its cireular frequency does not produce and sharply changes, make the braking procedure of swing type mechanism stable, level and smooth, greatly reduce and crane arm and tower body are impacted, ensure that the safe in operation of steel structure for tower crane, thus ensure that its service life.
As shown in Figure 1, described middle armature 5 is made up of two cylinders that opening direction is contrary, and the opening direction of one of them cylinder is towards alternating-current motor/AC motor 1, and the opening direction of another cylinder is towards rotary reducer 2; Described electromagnetic eddy power-transfer clutch 3 is arranged on opening towards in the cylinder of alternating-current motor/AC motor 1, and described electromagnetic whirlpool brake 4 is arranged on opening towards in the cylinder of rotary reducer 2.Middle armature 5 is designed to bitubular shape, electromagnetic eddy power-transfer clutch 3 and electromagnetic whirlpool brake 4 can be contained in two cylinders of armature respectively like this.Electromagnetic eddy power-transfer clutch 3 is contained in opening direction towards in the cylinder of alternating-current motor/AC motor 1, and the output shaft of such alternating-current motor/AC motor 1 can enter in cylinder from opening part, is connected with the electromagnetic eddy power-transfer clutch 3 in cylinder; At other one of middle armature 5, electromagnetic whirlpool brake 4 is arranged on opening towards in the cylinder of rotary reducer 2, can produce the lock torque that in the middle of hindering, armature 5 moves after energising under the effect of electromagnetic whirlpool brake 4 magnet coil magnetic field force.
As shown in Figure 1, also comprise slewing limiter 8, described slewing limiter 8 is synchronized with the movement with rotary reducer 2, and slewing limiter 8 is electrically connected with electric control system 6.During concrete enforcement slewing limiter 8 can be arranged on that gear, pivoting support etc. are any as required can with on the parts of rotary reducer 2 synchronous axial system, to monitor the angular transposition that rotary reducer 2 rotates, anti-rotation stopping mechanism corner exceeds tolerance band.
As shown in Figure 1, also comprise weathercock drg 7, described weathercock drg 7 is arranged on the outer wall of middle armature 5, and weathercock drg 7 is electrically connected with electric control system 6.Weathercock drg 7 under "on" position be again open be in release position, be its brake action disconnected under power failure state, weathercock drg 7 should be made before swing type mechanism starts to be energized release, can start smoothly to make swing type mechanism; When hoisting crane quits work, weathercock drg 7 is in braking mode, and swing type mechanism can not action arbitrarily, ensure that the safety of equipment.When there being wind, weathercock drg 7 is in release position, thus tower arm can be rotated with the wind be adjusted to downwind, make the frontal resistance of tower arm minimum.
Claims (4)
1. swing type mechanism, comprise alternating-current motor/AC motor (1) and rotary reducer (2), described alternating-current motor/AC motor (1) and rotary reducer (2) are in transmission connection, and it is characterized in that: also comprise electromagnetic eddy power-transfer clutch (3), electromagnetic whirlpool brake (4), middle armature (5), electric control system (6) and operator's station (9); Middle armature (5) one end is connected with rotary reducer (2), the other end is connected with the output shaft of alternating-current motor/AC motor (1) by electromagnetic eddy power-transfer clutch (3), and described electromagnetic whirlpool brake (4) is connected with middle armature (5); Described operator's station (9) is electrically connected with electric control system (6), described electromagnetic eddy power-transfer clutch (3) is electrically connected with the control current output terminal of electric control system (6), and described electromagnetic whirlpool brake (4) is electrically connected with the control current output terminal of electric control system (6).
2. swing type mechanism as claimed in claim 1, it is characterized in that: described middle armature (5) is made up of two cylinders that opening direction is contrary, the opening direction of one of them cylinder is towards alternating-current motor/AC motor (1), and the opening direction of another cylinder is towards rotary reducer (2); Described electromagnetic eddy power-transfer clutch (3) is arranged on opening towards in the cylinder of alternating-current motor/AC motor (1), and described electromagnetic whirlpool brake (4) is arranged on opening towards in the cylinder of rotary reducer (2).
3. swing type mechanism as claimed in claim 1, it is characterized in that: also comprise slewing limiter (8), described slewing limiter (8) and rotary reducer (2) are synchronized with the movement, and slewing limiter (8) is electrically connected with electric control system (6).
4. swing type mechanism as claimed in claim 2, it is characterized in that: also comprise weathercock drg (7), described weathercock drg (7) is arranged on the outer wall of middle armature (5), and weathercock drg (7) is electrically connected with electric control system (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420452090.3U CN204111213U (en) | 2014-08-11 | 2014-08-11 | Swing type mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420452090.3U CN204111213U (en) | 2014-08-11 | 2014-08-11 | Swing type mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN204111213U true CN204111213U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420452090.3U Active CN204111213U (en) | 2014-08-11 | 2014-08-11 | Swing type mechanism |
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| Country | Link |
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| CN (1) | CN204111213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104118806A (en) * | 2014-08-11 | 2014-10-29 | 四川建设机械（集团）股份有限公司 | Slewing mechanism |
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2014
- 2014-08-11 CN CN201420452090.3U patent/CN204111213U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104118806A (en) * | 2014-08-11 | 2014-10-29 | 四川建设机械（集团）股份有限公司 | Slewing mechanism |
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