CN2582269Y - Frequency-conversion, speed-adjustment lifting mechanism with multiple motor for tower crane - Google Patents
Frequency-conversion, speed-adjustment lifting mechanism with multiple motor for tower crane Download PDFInfo
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- CN2582269Y CN2582269Y CN 02277531 CN02277531U CN2582269Y CN 2582269 Y CN2582269 Y CN 2582269Y CN 02277531 CN02277531 CN 02277531 CN 02277531 U CN02277531 U CN 02277531U CN 2582269 Y CN2582269 Y CN 2582269Y
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- motor
- variable frequency
- control device
- speed control
- lifting mechanism
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Abstract
The utility model relates to a frequency change speed regulating lifting mechanism with multiple motors for a tower type crane, which uses a plurality of squirrel cage type motors as a motive power source, each motor is connected and controlled by a frequency change speed regulating controller, and each motor is connected with an input stage gear of a driving speed reducer by a hard shaft in parallel to drive the input stage gear. The utility model has the advantages of novel and reasonable design and no production influence and does not to be stopped when the motors or controllers have failure. The mechanism avoids economical loss, reduces cost and increases the technical performance of the whole machine.
Description
Technical field:
The utility model relates to a kind of building machinery, is specifically related to a kind of derrick crane multiple-motor frequency control lifting mechanism.
Background technology
Derrick crane is that the common heavy construction material in construction place vertically transports machinery.Along with improving constantly of the continuous development of Building Trade in China, construction machine level, also just more and more higher to the requirement of the manufacturing of derrick crane for building and technical merit.China's derrick crane is compared with abroad going together, and starts late, and also there is tangible gap in everyway, and particularly on each transmission mechanism, gap is bigger.As a kind of derrick crane of large-sized structural parts formula, the mode that each transmission mechanism adopted, the technical merit of control system, user's operability and maintainable technical merit and the class that has just embodied whole derrick crane basically.And in these several mechanisms, of paramount importance also is to possess skills most representationally to be: lifting mechanism.Its power controlling maximum, the scope of speed governing is the wideest, and the maintenance difficulty after being out of order is also maximum.And this mechanism machinery and electric speed governing impact also have bigger influence useful life to the total part.
Domestic each manufacturer has in the industry also descended than great strength to improve performance in this mechanism, bigger progress has also been arranged than before, as a whole, what all adopt is the monomotor transmission scheme, adopt wire resistor speed governing and multipolar electric motor speed-regulating scheme mostly, yet want to reach the speed adjustable range of broad, only manufacture and design the extraordinary motor of high-power wide speed regulating range, as adopt extraordinary multipole coiling electric motor, or make the multispeed electric machine of big extreme difference, so, not only increase the manufacturing cost of control loop and motor greatly, reduced the operational reliability of motor.And generally adopt the patrilineal line of descent with only one son in each generation of a cover control system, a motor to move lifting mechanism, in case a certain link breaks down, the maintenance of non-stopping of whole tower machine, if motor damages, change in the high-altitude more than 100 meters the motor that hoists really one allow user and manufacturer's pain in the neck.
Summary of the invention:
Technical problem to be solved in the utility model is: solve existing derrick crane and adopt monomotor transmission lifting mechanism to manufacture and design that difficulty is big, cost is high, must shut down maintenance, maintenance cost and difficulty is big, maintenance time long, the stop work and production loss is serious problem in case break down, and provide a kind of and certain motor or certain part control system were broken down still do not influence tower machine operate as normal, alleviate maintenance pressure, avoid idle cost, reduce the derrick crane multiple-motor frequency control lifting mechanism of lifting mechanism cost.
The technical solution adopted in the utility model is: this derrick crane multiple-motor frequency control lifting mechanism by two or two above motor as power source, motor is a squirrel-cage motor, every motor all connects control by a variable frequency regulating speed control device, and each motor is with the input stage gear of hard axle ways of connecting drive speed reducer in parallel.
In the technique scheme, described two or two squirrel-cage motors that above motor is same model and equal-wattage, the speed that the reductor input stage obtains is identical with each motor speed, and torque is each motor output torque sum.
In the technique scheme, between the described motor, hard axle connects and is meant between the motor coaxial connection or connects by transmission mechanism, drives a manufacturing machine or operating mechanism jointly.
Being meshing with each other of above-mentioned multiple-motor rotor of output shaft axle gear can be installed in the middle device, also can be installed in the reductor.
When above-mentioned multiple-motor afterbody is not installed brake, then also brake gear should be installed on the rotor of output shaft axle of motor.
The utility model has mainly solved the problem of following two aspects:
One, avoided lifting mechanism to be out of order substantially, the tower machine must be shut down the problem of maintenance.By our taking a broad survey; the main failsafe link of tower lifting mechanism is control loop and motor; and these two links are as long as one be out of order; tower machine complete machine must shutdown maintenance; particularly motor goes wrong, and its maintenance time is long, and maintenance cost is higher; tend to cause the building site to stop work, this loss that causes for the user also is huge.And this many transmission mechanisms that the utility model proposed had both made a motor or certain part control system break down, because the tower machine most of the time does not have full-load run, so need only the words that tower machine reduction capacity is used, do not influence the operate as normal of tower machine, this has also just alleviated the maintenance pressure of tower machine.
Two, reduce the complete machine cost of lifting mechanism.Along with the tower machine constantly develops, in, the ratio of large-scale derrick crane in whole tower machine total amount be more and more, and the cost of monomotor lifting mechanism shared ratio in complete machine is also just increasing, its reason mainly is that this mechanism of requirement possesses due to the characteristic that high-power and big speed adjustable range is arranged, because meet this requirement, no matter to motor or to the manufacturing and the design difficulty of control system a bigger rising can be arranged all, corresponding manufacturing cost just has one significantly to be increased.And in many motors of the utility model lifting mechanism, each motor power (output) is original 1/n, and single control system power also becomes original 1/n, and we did accounting, and in fact the drive system of n 1/n power is lower than single motor lifting mechanism cost.
Description of drawings:
Fig. 1 is the utility model structural principle block diagram
Fig. 2 is the utility model embodiment 1 configuration diagram
Fig. 3 is the utility model embodiment 2 configuration diagram
Fig. 4 is the utility model embodiment 3 configuration diagram
The accompanying drawing marking explanation:
1---motor 2---motor
3---reductor 4---cable drum
5---control system 6---variable frequency regulating speed control device
7-variable frequency regulating speed control device 8---velocity setting unit
9---motor output shaft 10---motor output shaft gear
11---spring bearing 12---brake
13---brake 14---motor set bolt
15---reductor input stage gear 16---motor output shaft gear
17---spring bearing 18---middle device
19---shaft coupling SW---velocity setting potentiometer
20---brake resistance 21---PG card
The positive turn-off of 22---photoelectric encoder K1---closes
K2---reversal switch 23---CA1 terminal
Embodiment:
Referring to Fig. 1, the utility model includes motor 1, motor 2, reductor 3, reel 4 and control system 5, wherein contain variable frequency regulating speed control device 7 and the variable frequency regulating speed control device 6 of controlling motor 1 and motor 2 respectively in the control system 5, and velocity setting unit 8 is arranged.
It also can be a plurality of that motor number of the present utility model can be two.
The utility model is what to finish the lift work of derrick crane as follows: with the two motors shown in Fig. 1 is example, when two motor 1,2 is the single speed squirrel-cage motor, 6,7 is two independently variable frequency regulating speed control devices, wherein the control mode of system's employing of motor 1 and variable frequency regulating speed control device 7 compositions is a speed control, the control mode that the system that motor 2 and variable frequency regulating speed control device 6 are formed adopts is a Torque Control, and variable frequency regulating speed control device 7 outputs one torque signals of speed control method is as the input of the variable frequency regulating speed control device 6 of another Torque Control mode, like this, the output of two motors biography square all equates on any one speed.The armature spindle moment sum of motor 1 and motor 2 passes to reductor 3, and the speed that the input stage of reductor 3 obtains is identical with motor 1,2; Torque is two a motor reel torque sum.And by 4 rotations of reductor 3 driving reels, and then by about the steel wire rope drive suspension hook.Detailed process is as follows: during rising: when 7 one instructions of variable frequency regulating speed control device V1 of speed control is given in velocity setting unit 8, if the spinner velocity＜V1 of motor 1, so, motor 1 will quicken, and corresponding electronic torque strengthens, and this dtc signal can be sent to the variable frequency regulating speed control device 6 of another torque control, and this torque variable frequency regulating speed control device 6 can make the output torque of motor 2 increase, at this moment, whole lifting velocity strengthens.On the contrary, if the spinner velocity of speed command V1＜motor 1, the variable frequency regulating speed control device 7 of speed control can reduce the output torque of motor 1, more than similar, motor 2 can reduce the output torques, promptly lifting mechanism speed descends, until being V1.During decline in like manner.
Velocity setting of the present utility model unit 8 is made of a potentiometer SW and two K switch 1, K2, potentiometer SW is the velocity setting potentiometer, its center sub is connected to variable frequency regulating speed control device 6 " velocity setting " binding post, the two ends of velocity setting potentiometer SW connect 15,17 ends of variable frequency regulating speed control device 6 respectively, and two K switch 1, K2 also are connected to 1,2,11 ends of variable frequency regulating speed control device 6 and 1,2,11 ends of variable frequency regulating speed control device 7 respectively.
Variable frequency regulating speed control device 6,7 of the present utility model adopts prior art: the model of day intrinsic safety river mechanical ﹠ electrical corporation product is the VS-616G5 frequency converter, specific embodiment as shown in Figures 2 and 3, two embodiment difference are the reductor form difference that adopts, operation principle is just the same, now performs an analysis with Fig. 2:
Present embodiment specifically contains: motor 1 and the brake 13 that is placed in its afterbody, the output shaft gear 14 of motor; Motor 2 and the brake 12 that is placed in its afterbody, the output shaft gear 15 of motor; The cylindrical gear reducer 3 of two motor 1 and motor 2 is installed on the shell; The cable drum 4 that cylindrical gear reducer 3 connects; Also has velocity setting unit 8; Variable frequency regulating speed control device 6 and variable frequency regulating speed control device 7.For the variable frequency regulating speed control device of the manufacturer that has, can not need " photoelectric encoder " 22 and " PG card " 21 among the figure.
After device powers on, by velocity setting unit 8 by wherein K1 and K2 send the rotation direction signal; SW provides the fast slow signal of speed by " velocity setting potentiometer ", and wherein K1 is connected to variable frequency regulating speed control device 6 and No. 1 terminal that is connected to variable frequency regulating speed control device 7 simultaneously, connects expression and just changes; K2 is connected to variable frequency regulating speed control device 6 simultaneously and is connected to No. 2 terminals of variable frequency regulating speed control device 7, connects the expression counter-rotating; Three statures of " velocity setting potentiometer " are received 13,15 and 17 ends of variable frequency regulating speed control device 6 respectively, regulate the swing arm position of " velocity setting potentiometer ", have just changed the size of speed command.Civil power is received R, S, the T end of variable frequency regulating speed control device 6 and variable frequency regulating speed control device 7 respectively.Wherein the A in the civil power also receives No. 10 ends of variable frequency regulating speed control device 6 and variable frequency regulating speed control device 7 mutually respectively, No. 9 terminals of variable frequency regulating speed control device 6 and variable frequency regulating speed control device 7 are received respectively on brake 12 and the brake 13, and another root line parallel of two brakes is received on the civil power N line; The U of variable frequency regulating speed control device 6 and variable frequency regulating speed control device 7, V, W end are received the stator winding of motor 2 and motor 1 respectively; The signal output part of variable frequency regulating speed control device 6 is received for 21, No. 22 in the signal input part 16 of variable frequency regulating speed control device 7 and No. 17; For the VS-616G5 type variable frequency regulating speed control device that present embodiment adopted, for service behaviour better, " the PG card " 21 that also needs " photoelectric encoder " 22 as shown in the figure and match with it is connected on the CA1 terminal of variable frequency regulating speed control device 7, can not want for the variable frequency regulating speed control device " photoelectric encoder " of some manufacturer and " the PG card " that matches with it.
The course of work is as follows:
When just changeing, when K1 or K2 connect, variable frequency regulating speed control device 6 will go out to give the frequency and the amplitude of the voltage of motor 2 according to the swing arm position calculation of " velocity setting potentiometer ", and determine U according to K1 or K2 connection situation, V, the phase sequence of voltage is sent this voltage then to motor 2 on the W end, connect 9 simultaneously, No. 10 ends, brake 12 will get electric and open at this moment, meanwhile, variable frequency regulating speed control device 6 also will calculate an internal signal and deliver to 21 and 22 ends, variable frequency regulating speed control device 7 inputs 16 and 17 that are connected to this end will obtain a control command, variable frequency regulating speed control device 7 will be sent correspondent voltage to U according to the on off state of command value and K1 or K2, V, on the W end, and connect self 9, No. 10 ends are opened brake 13 and drive motor 1 and are followed motor 2 runnings.
When motor 1 wiring, require opposite with the rotation direction of motor 2, when variable frequency regulating speed control device 6 and variable frequency regulating speed control device 7 are received the just commentaries on classics instruction (K1 closure) of velocity setting unit 8, if motor 2 is done rotation counterclockwise, motor 1 will be made clockwise direction and rotate.By 1 output shaft gear 10 of the motor in the cylindrical gear reducer 3 and 16 engagements of motor 2 output shaft gears, speed and transmission of torque to reductor input stage gear 15, effect by cylindrical gear reducer 3, form with low speed and high pulling torque drags cable drum 4 runnings, moves up and down thereby drive suspension hook through steel wire rope.Its direction is controlled by K switch 1 and K2 in the velocity setting unit 8; Its velocity magnitude is subjected to " velocity setting potentiometer " SW control in the velocity setting unit 8.
" photoelectric encoder " 22 and " PG card " the 21st, the selected variable frequency regulating speed control device 7 of present embodiment are used for that accurate Calculation more uses, and the variable frequency regulating speed control device of some manufacturer can not need.
In case have any motor or variable frequency regulating speed control device to be out of order; can throw this motor or variable frequency regulating speed control device fully away; and the parallel connection of brake loop; simultaneously velocity setting unit 8 is received on the variable frequency regulating speed control device that needs operation; at this moment; lifting mechanism can move in the same old way; difference has been that liter weight descends; because the most of the time; derrick crane is not operated in full load condition; so, the normal use of tower machine there is not influence substantially, this has just been avoided keeping in repair the problem of non-shutdown.
The utility model embodiment 3 referring to Fig. 4, the present embodiment emphasis is meshing with each other at the rotor of output shaft axle gear 10,16 of introducing multiple- motor 1,2, this being meshing with each other finished in a middle device 18, input stage gear 15 by shaft coupling 21 and connecting shaft and reductor 3 after gear 10,16 is meshing with each other is connected and fixed, transmit reductor input stage gear 15 thereby be rigidly connected, realize the power source of multiple-motor parallel connection as lifting mechanism.The motor 1,2 of present embodiment is respectively by the connection of variable frequency regulating speed control device 6,7 and velocity setting unit 8 control, and motor is that squirrel-cage motor variable frequency regulating speed control device 6,7 is prior art, as hereinbefore.
According to definition, described in the utility model multimotor " it is the rigidity contact that hard axle connects, and connects as the hard axle of two motors to be meant the coaxial connection of two motors or to connect by transmission mechanism that both drive a manufacturing machine or operating mechanism jointly.”
Claims (3)
1, a kind of derrick crane multiple-motor frequency control lifting mechanism, it is characterized in that by two or two above motor as power source, motor is a squirrel-cage motor, every motor all connects control by a variable frequency regulating speed control device, and each motor is with the hard axle ways of connecting input stage gear of drive speed reducer in parallel.
2, derrick crane multiple-motor frequency control lifting mechanism according to claim 1 is characterized in that two or two squirrel-cage motors that above motor is same model and equal-wattage.
3, derrick crane multiple-motor frequency control lifting mechanism according to claim 1 is characterized in that being meshing with each other of multiple-motor rotor of output shaft axle gear can be installed in the middle device, also can be installed in the reductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02277531 CN2582269Y (en) | 2002-10-28 | 2002-10-28 | Frequency-conversion, speed-adjustment lifting mechanism with multiple motor for tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02277531 CN2582269Y (en) | 2002-10-28 | 2002-10-28 | Frequency-conversion, speed-adjustment lifting mechanism with multiple motor for tower crane |
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| Publication Number | Publication Date |
|---|---|
| CN2582269Y true CN2582269Y (en) | 2003-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02277531 Expired - Fee Related CN2582269Y (en) | 2002-10-28 | 2002-10-28 | Frequency-conversion, speed-adjustment lifting mechanism with multiple motor for tower crane |
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| CN (1) | CN2582269Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414405A (en) * | 2013-08-28 | 2013-11-27 | 中国葛洲坝集团机械船舶有限公司 | Device for balancing bridge type hoist motor moment and control method |
| CN104863705A (en) * | 2015-05-29 | 2015-08-26 | 桂林市华力重工机械有限责任公司 | Motor parallel drive looseness prevention structure |
| CN106330055A (en) * | 2016-09-12 | 2017-01-11 | 新疆广汇中化能源技术开发有限公司 | Rotary radiation bed system |
| CN106976803A (en) * | 2017-05-10 | 2017-07-25 | 河南新科起重机股份有限公司 | Governing system and quenching crane |
| CN109466996A (en) * | 2018-12-21 | 2019-03-15 | 安徽伟天机电设备有限公司 | A kind of coal mine lifting machine permanent magnet synchronous direct driving device |
| CN111039208A (en) * | 2019-12-10 | 2020-04-21 | 长沙海川自动化设备有限公司 | Frequency conversion hoisting mechanism and tower crane |
-
2002
- 2002-10-28 CN CN 02277531 patent/CN2582269Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414405A (en) * | 2013-08-28 | 2013-11-27 | 中国葛洲坝集团机械船舶有限公司 | Device for balancing bridge type hoist motor moment and control method |
| CN104863705A (en) * | 2015-05-29 | 2015-08-26 | 桂林市华力重工机械有限责任公司 | Motor parallel drive looseness prevention structure |
| CN106330055A (en) * | 2016-09-12 | 2017-01-11 | 新疆广汇中化能源技术开发有限公司 | Rotary radiation bed system |
| CN106976803A (en) * | 2017-05-10 | 2017-07-25 | 河南新科起重机股份有限公司 | Governing system and quenching crane |
| CN109466996A (en) * | 2018-12-21 | 2019-03-15 | 安徽伟天机电设备有限公司 | A kind of coal mine lifting machine permanent magnet synchronous direct driving device |
| CN111039208A (en) * | 2019-12-10 | 2020-04-21 | 长沙海川自动化设备有限公司 | Frequency conversion hoisting mechanism and tower crane |
| CN111039208B (en) * | 2019-12-10 | 2021-02-09 | 长沙海川自动化设备有限公司 | Frequency conversion hoisting mechanism and tower crane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHANGSHA JINGLONG ENGINEERING MECHANIC CO., LTD. Free format text: FORMER OWNER: NI JIANJUN Effective date: 20061201 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20061201 Address after: 410205 Hunan province Changsha hi tech Industrial Development Zone, valley base Lu Tin Road No. 8 Patentee after: Changsha Jing Long Construction Machinery Co., Ltd. Address before: 410006 Hunan province city Changsha Moon Lake three Haichuan Electromechanical Technology Company Patentee before: Ni Jianjun |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20031022 Termination date: 20101028 |