CN201577011U - Permanent synmotor used for hoisting mechanism of inner rotor direct-drive type crane - Google Patents
Permanent synmotor used for hoisting mechanism of inner rotor direct-drive type crane Download PDFInfo
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- CN201577011U CN201577011U CN2009202034685U CN200920203468U CN201577011U CN 201577011 U CN201577011 U CN 201577011U CN 2009202034685 U CN2009202034685 U CN 2009202034685U CN 200920203468 U CN200920203468 U CN 200920203468U CN 201577011 U CN201577011 U CN 201577011U
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- permanent magnet
- rotor
- hoisting mechanism
- synchronous motor
- magnet synchronous
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Abstract
The utility model discloses a permanent synmotor used for a hoisting mechanism of an inner rotor direct-drive type crane. The permanent synmotor comprises a permanent synmotor casing, a stator winding, a stator iron core, a permanent magnet, a rotor, a rotating shaft of a winding drum, and the winding drum, wherein the pole number of the permanent synmotor is more than twenty. By adding the pole number of the magnetoelectric machine and adopting the frequency-conversion power supply to supply power, the permanent synmotor realizes the low-speed operation of a motor, outputs higher torque, directly drives a load to work, and cancels a reduction gear, so that the structure is simpler and more practical, and the working efficiency of the system is improved. The rotor structure adopted by the utility model can effectively solve the problem that the assembly of the magnetoelectric machine is difficult; the permanent magnet is less susceptible to damage during assembly through the common protection of a rotor pole and a magnetism separation steel ring; and the torque of a magnetic resistance is reduced to zero during mounting process, so that the mounting difficulty, and the requirement for and dependence on a mounting instrument (dedicated assembly equipment) are lowered, and the quality and the structural complexity of the rotor are greatly lowered.
Description
Technical field
The utility model belongs to technical field of motors, particularly a kind of internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor.
Background technology
Crane hoisting mechanism as a typical machinery, electric be the equipment of one, undertaking the vital task that the various article displacements that hoist are moved, be the main core component of crane crane, so motor is its " heart " part, i.e. power source parts.
The motor drive system that present crane hoisting mechanism mainly adopts can be divided into following three classes:
1, phase asynchronous alternating current motor dragging system
This is the phase I of crane hoisting mechanism Electric Traction development, and common phase asynchronous alternating current motor satisfies the performance and the requirement of crane hoisting mechanism by the measures such as deceleration of union joint, drive link, reductor.Because squirrel cage asynchronous motor is difficult to satisfy the requirement of elevator starting and speed adjusting performance, therefore many employing wound rotor asynchronous motors drag.Can limit starting current after the wound rotor asynchronous motor rotor loop crosstalk resistance and improve starting torque, and speed governing within the specific limits.Advantages such as this system has simple in structure, and is sturdy and durable, easy to maintenance, cheap, and Installation and Debugging are convenient.Shortcoming is that the start-up period electric energy loss is bigger, and when being used for the multilevel crane hoisting mechanism of the requirement Fraquent start or the different speeds of service, this problem is just more outstanding.Owing to carry out speed governing by excision rotor loop resistance, so the speed adjusting performance of system is bad, speed adjustable range is little and be step speed regulation.
2, generating set-DC motor dragging system
Because the speed adjusting performance of wound rotor asynchronous motor is not ideal enough, so people just begin to adopt this driving style.The mechanical property of DC motor is a straight line, and speed adjusting performance is better, and it is more reliable to work.The generator-motor dc trailing system, main lifting motor is the separated exciting DC motor, the DC generator that is driven by synchronous motor is to its direct power supply, change the voltage at DC motor armature two ends by the excitation size that changes DC generator, thereby change the rotating speed of motor, reach the speed governing purpose of crane hoisting mechanism.The speed closed loop mode of speed regulation that this system adopts magnetic amplifier and amplidyne two-stage to amplify.To the signal that certain portions is sent here, be added to the given winding of double-beat magnetic amplifier, after amplifying, supply with the given winding of amplidyne, the excitation winding of sending and receiving motor after amplifying once more.The feedback winding of magnetic amplifier and amplidyne is received separately output respectively by the negative feedback connection, and magnetic amplifier constitutes the external feedback link, and amplidyne constitutes the voltage negative feedback element, makes magnetic amplifier and amplidyne have comparatively ideal characteristic.Obtain to test the speed feedback signal by a tachogenerator that is connected with the hard axle of crane hoisting mechanism, be added to magnetic amplifier speed feedback winding and given signal comprehensively compares, formation negative velocity feedback link.The characteristics of generator-motor dc trailing system are that overload capacity is strong, and equipment needed thereby is conventional approved product, and the supply of material is easy, and reliable, specification requirement is not high, can not cause injurious effects to the electrical network beyond the system.Shortcoming is that efficient is low, on average has only about 75%; Speed adjustable range is because the remanent magnetism influence can not be excessive; The equipment complexity, huge, floor space is big etc.At present, the less employing of this system.
3, the dc trailing system of thyristor rectifier device power supply
From early 1960s to the seventies, in this nearly 20 years time, be accompanied by the develop rapidly of power electronic technology, the dc trailing system of thyristor rectifier device power supply is developed rapidly and is popularized, and this is the second stage of crane hoisting mechanism Electric Traction development.For obtaining the reversible operation characteristic to realize the four-quadrant speed governing, this system has two kinds of electrical control schemes usually: a kind of is the reversible automatic speed regulation scheme of armature, and the polarity of the armature voltage by changing DC motor changes the machine traffic direction that hoists; Another kind is the reversible automatic speed regulation scheme in magnetic field, by changing DC motor exciting current direction, changes the traffic direction of the machine of hoisting.No matter take which kind of scheme, speed regulating method is generally based on pressure regulation, and adjustable magnetic is auxilliary.The reversible scheme of armature need change the direction of motor armature loop current, because the armature circuit inductance is less, and time constant little (a few tens of milliseconds approximately), reverse procedure carries out soon, therefore is applicable to the multi level hoisting system of Fraquent start, braking.But this scheme major loop needs the bigger thyristor converter devices of two cover capacity, and one-time investment is bigger, and the machine capacity of hoisting is big more, and this problem is just outstanding more.Only with a cover thyristor converter devices, energized circuit adopts two cover thyristor converter devices for the reversible scheme in magnetic field, major loop.Because exciting power is less, so the equipment total capacity is more much smaller than the reversible scheme of armature, one-time investment is less.But, because the energized circuit inductance value is bigger, time constant big (several seconds zero point is to the several seconds approximately), therefore, this system reverse process is slower, after adopting field-forcing, its rapidity can obtain compensation to a certain degree, but switching time is still more than the hundreds of millisecond.Should be understood that, the magnetic field bilateral system is in the motor Umklapp process, when exciting current changes direction, the armature voltage that should make motor is zero, with prevent motor in handoff procedure owing to lose excitation " driving ", this has not only increased the dead band of reverse procedure, has also increased the complexity of control system.
Above-mentioned three class crane hoisting mechanisms are with motor and dragging system, exist all that some we do not wish the shortcoming and the problem that exist.Such as the existence of reductor, not only increased cost, also cause the transmission efficiency of whole drive system greatly to reduce, and exist problems difficult in maintenance or the like.The mounting seat that the reductor volume is big, needs are bigger.Because the reductor input connects the threephase asynchronous of a high-speed cruising, its bearing noise is big during operation, and its operation noise is generally about 60～70db.Gear drive exists mechanical wear inevitably, and along with the increase of running time, wearing and tearing make between the moving component gap become big, cause noise aggravation, transmission efficiency to descend.In mechanical driving device, though the reductor drive system has the advantage that reduces rotating speed and increase moment of torsion, its efficient is low, consume energy, operation noise are big etc., and shortcoming can't overcome.Generally speaking, transmission efficiency has 20～30% electric energy to be wasted with the thermal losses form between 68～88% approximately.For the frictional heat that produces in the wearing and tearing that reduce reductor and the transmission slip process, the use of lubricating oil is essential, periodic replacement lubricating oil has not only increased the regular maintenance expense, and the oil gas that produces in the running and greasy dirt also can cause direct pollution to environment.There is the low shortcoming of power factor in the dc trailing system of thyristor rectifier device power supply.Although adopted sequential control technology, power factor is still lower, need absorb a large amount of reactive powers by electrical network, and the electrical network quality factor are produced serious influence.The capacity of crane hoisting mechanism is big more, and this problem is just outstanding more.On the other hand, the commutator in DC motor armature loop has limited the further increase of elevator capacity, along with the tonnage of crane hoisting mechanism constantly enlarges, the crane hoisting mechanism single-machine capacity also continues to increase, and the commutation commutator of motor has just become a weak link.
The utility model content
In order to overcome problems such as cost height (for example existence of reductor), efficient that above-mentioned existing crane draws high mechanism's dragging system is low, difficult in maintenance, the utility model provides a kind of internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor, realize the low cruise of motor, export bigger torque, directly drive loaded work piece, (cancellation reductor and other a series of transmission mechanisms) significantly reduce cost, improve system works efficient, strengthened reliability of system operation, simple in structure, reduced maintenance difficulty.
In order to achieve the above object, the internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor that the utility model provides, comprise: permanent magnet synchronous motor housing, stator winding, stator core, permanent magnet, rotor, reel rotating shaft, reel, the number of poles of described permanent magnet synchronous motor 20 extremely more than.
The internal rotor hoisting mechanism of direct-drive crane that the utility model provides with permanent magnet synchronous motor one optimal technical scheme is: described permanent magnet synchronous motor adopts inverter supply.
The internal rotor hoisting mechanism of direct-drive crane that the utility model provides with permanent magnet synchronous motor one optimal technical scheme is: described rotor directly is installed in the reel rotating shaft.
The internal rotor hoisting mechanism of direct-drive crane that the utility model provides with permanent magnet synchronous motor one optimal technical scheme is: the rotor supports axle outside of described rotor is provided with every the magnet steel circle.
The internal rotor hoisting mechanism of direct-drive crane that the utility model provides with permanent magnet synchronous motor one optimal technical scheme is: describedly be provided with some rotor magnetic poles every the magnet steel circle outside.
The internal rotor hoisting mechanism of direct-drive crane that the utility model provides with permanent magnet synchronous motor one optimal technical scheme is: described permanent magnet is installed in the slit of adjacent rotor magnetic pole.
The internal rotor hoisting mechanism of direct-drive crane that the utility model provides with permanent magnet synchronous motor one optimal technical scheme is: described permanent magnet surfaces scribbles nano adhesive.
The internal rotor hoisting mechanism of direct-drive crane that the utility model provides with permanent magnet synchronous motor one optimal technical scheme is: described permanent magnet synchronous motor drives or two driving for single.
Permanent magnet synchronous motor installation process of the present utility model is as follows: the permanent magnet synchronous motor housing is fixed on the crane hoisting mechanism support, stator core directly is installed on the permanent magnet synchronous motor housing with bolt, stator winding is distributed on the stator core, rotor magnetic pole with bolt on the magnet steel circle, crossing bolt every magnet steel circle and rotor supports Tie Tong links together, rotor directly is placed in the reel rotating shaft, the reel rotating shaft directly is placed in the reel left bearing, reel is with on the right bearing, regulate stator, rotor is installed and is cooperated, the air gap that guarantees motor is even, the stator of motor is fixed to the assigned address of working site, permanent magnet is spread nanometer be stained with the mixture plug in the slit of the adjacent rotor magnetic pole of rotor; Last frequency converter is by power supply lead-in wire and permagnetic synchronous motor line.
Beneficial technical effects of the present utility model is:
1, the internal rotor hoisting mechanism of direct-drive crane connects use with permasyn motor direct, also can adopt inverter supply, frequency converter directly links to each other with permagnetic synchronous motor by lead-in wire, realize the varying frequency starting of permanent magnet synchronous motor, improved the transmission efficiency of crane hoisting mechanism system, strengthened reliability of system operation, simple in structure, reduced maintenance difficulty or the like.
2, the internal rotor hoisting mechanism of direct-drive crane process and make and will finish in factory, but installation process will be finished synchronously at the assembling scene of crane hoisting mechanism with each parts in the permanent magnet synchronous motor.Earlier with the stator of motor and rotor (permanent magnet is not installed) respectively in order assembling finish, the rotor of motor is fixed in the described reel rotating shaft, regulate stator, rotor is installed and is cooperated, the air gap that guarantees motor is even, the stator of motor is fixed to the assigned address of working site, afterwards permanent magnet is spread nano adhesive plug position shown in the accompanying drawing 2 to the rotor, finish of the installation of internal rotor hoisting mechanism of direct-drive crane with permanent magnet synchronous motor, after finishing frequency converter and permagnetic synchronous motor line, can power to motor by frequency converter, make it enter operating state, can finish the lifting task that hoists.
3, internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor, by increasing the number of poles of magneto, the power supply of employing variable frequency power supply, realize the low cruise of motor, export bigger torque, directly drive loaded work piece, the cancellation reductor, parts such as cancellation part kinematic link and shaft coupling improve system works efficient.
4, the internal rotor hoisting mechanism of direct-drive crane can effectively prevent the difficult problem of magneto assembling with the rotor structure of permanent magnet synchronous motor.Common frequency conversion permanent magnet motor often adopts the surface-mount type rotor structure, the collision of permanent magnet Chang Yinyu stator core during installation and fragmentation, and structure of the present utility model can be effectively by rotor magnetic pole and not fragile when the magnet steel circle is protected the permanent magnet assembling jointly.Compare with direct current machine, greatly reduce the quality of rotor and the complexity of rotor structure; Reuse threephase asynchronous and compare with metallurgical the rising of YZR series, saved parts such as collector ring, high end cap, bearing, for producing and installation has brought a lot of facilities.
5, the internal rotor hoisting mechanism of direct-drive crane rotor structure and the erection sequence of permanent magnet synchronous motor, can make the reluctance torque of installation process be reduced to zero, reduced installation difficulty, reduced requirement and dependence, helped permanent magnet synchronous motor more and popularize fast and development erecting tools (special-purpose mounting equipment).
6, the internal rotor hoisting mechanism of direct-drive crane directly is installed in the reel rotating shaft of crane hoisting mechanism with the rotor structure of permanent magnet synchronous motor, compares with common shaft coupling connected mode, and this structure is simpler, practical, improves overall system efficiency.
7, internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor, motor basic model are single drive (end), also can twoly drive (two ends).
8, internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor, this motor can be adjusted design according to working condition requirement.Substantially serial: rated frequency: 50Hz, rated voltage: 380V, the blower fan cooling, F, the insulation of H different brackets, benchmark job system S3, the non-maintaining time is 10 years, 20 years useful life.
Description of drawings
Fig. 1 is the structure chart that the internal rotor hoisting mechanism of direct-drive crane is used permanent magnet synchronous motor among the utility model embodiment;
Fig. 2 is the rotor sectional view that the internal rotor hoisting mechanism of direct-drive crane is used permanent magnet synchronous motor among the utility model embodiment.
Embodiment
Below in conjunction with drawings and the specific embodiments the utility model is elaborated.
Please refer to Fig. 1 and Fig. 2, the internal rotor hoisting mechanism of direct-drive crane of present embodiment comprises with permanent magnet synchronous motor: permanent magnet synchronous motor housing 1, stator winding 2, stator core 3, permanent magnet 4, rotor 5, rotor magnetic pole 51, every magnet steel circle 52, rotor supports axle 53, reel rotating shaft 6, reel 7, reel with right bearing 8, reel with left bearing 9, support 10, inverter supply lead-in wire 11.Permanent magnet synchronous motor housing 1, be fixed on the crane hoisting mechanism support 10, stator core 3 directly is installed on the permanent magnet synchronous motor housing 1 with bolt, stator winding 2 is distributed on the stator core 3, rotor 5 is placed in the reel rotating shaft 6, rotor magnetic pole 51 usefulness bolt are on magnet steel circle 52, link together by bolt every magnet steel circle 52 and rotor supports axle 53, permanent magnet 4 is placed on the rotor 5, reel rotating shaft 6 directly be placed in reel with left bearing 9, reel with on the right bearing 8.The utility model adopts inverter supply, and frequency converter directly links to each other with permagnetic synchronous motor by power supply lead-in wire 11, realizes the varying frequency starting of permanent magnet synchronous motor.
The on-the-spot specific implementation method of installing: above-mentioned internal rotor hoisting mechanism of direct-drive crane process and make and will finish in factory, but installation process will be finished synchronously at the assembling scene of crane hoisting mechanism with each parts in the permanent magnet synchronous motor.Earlier with the stator of motor and rotor (permanent magnet is not installed) respectively in order assembling finish, the rotor of motor is fixed in the described reel rotating shaft, regulate stator, rotor is installed and is cooperated, the air gap that guarantees motor is even, the stator of motor is fixed to the assigned address of working site, afterwards permanent magnet being spread nanometer is stained with in the slit of mixture plug adjacent rotor magnetic pole to the rotor, finish of the installation of internal rotor hoisting mechanism of direct-drive crane with permanent magnet synchronous motor, finish frequency converter by behind power supply lead-in wire and the permagnetic synchronous motor line, can power to motor by frequency converter, make it enter operating state, can finish the lifting task that hoists.
Originally being that embodiment adopts frequency converter--magneto directly drives crane hoisting mechanism work, and the advantage of native system is:
(1) save parts such as reductor, shaft coupling, dwang, this structure is simpler, practical, improves overall system efficiency;
(2) do not have this weak link of commutator and carbon brush, guaranteed the reliability service of motor and reduced operation to consume;
(3) power factor height can reach 0.9～1, has greatly saved electric energy;
(4) dynamic quality is good, and system can seamlessly transit and stepless speed regulation at four-quadrant;
(5) because mechanical property is good, so starting torque is big;
(6) price of synchronous motor is lower than DC generator;
(7) speed-regulating range width.Therefore, variable frequency speed-adjusting permanent magnet synchronous motor dragging system should be the inevitable development direction of crane hoisting mechanism.
Above content be in conjunction with concrete optimal technical scheme to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (8)
1. internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor, comprise: permanent magnet synchronous motor housing (1), stator winding (2), stator core (3), permanent magnet (4), rotor (5), reel rotating shaft (6), reel (7) is characterized in that: the number of poles of described permanent magnet synchronous motor 20 extremely more than.
2. internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor according to claim 1 is characterized in that: described permanent magnet synchronous motor adopts inverter supply.
3. internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor according to claim 2 is characterized in that: described rotor (5) directly is installed in the reel rotating shaft (6).
4. internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor according to claim 3 is characterized in that: rotor supports axle (53) outside of described rotor (5) is provided with every magnet steel circle (52).
5. internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor according to claim 4 is characterized in that: the described some rotor magnetic poles (51) that are provided with outside magnet steel circle (52).
6. internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor according to claim 5 is characterized in that: described permanent magnet (4) is installed in the slit of adjacent rotor magnetic pole (51).
7. internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor according to claim 6 is characterized in that: described permanent magnet (4) surface scribbles nano adhesive.
8. internal rotor hoisting mechanism of direct-drive crane permanent magnet synchronous motor according to claim 7 is characterized in that: described permanent magnet synchronous motor drives or two driving for single.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202034685U CN201577011U (en) | 2009-09-18 | 2009-09-18 | Permanent synmotor used for hoisting mechanism of inner rotor direct-drive type crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202034685U CN201577011U (en) | 2009-09-18 | 2009-09-18 | Permanent synmotor used for hoisting mechanism of inner rotor direct-drive type crane |
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| CN201577011U true CN201577011U (en) | 2010-09-08 |
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| CN2009202034685U Expired - Fee Related CN201577011U (en) | 2009-09-18 | 2009-09-18 | Permanent synmotor used for hoisting mechanism of inner rotor direct-drive type crane |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101980429A (en) * | 2010-11-02 | 2011-02-23 | 张家港倍恩特磁塑科技有限公司 | Method for manufacturing oriented magnetic field in plastic magnetic rotor mold |
| CN106533055A (en) * | 2016-12-30 | 2017-03-22 | 哈尔滨三跃驱动技术股份有限公司 | Low-speed permanent-magnet direct-driving system for rubber mixing machine |
| CN109667303A (en) * | 2019-01-29 | 2019-04-23 | 北京大圣格尔冶金设备有限公司 | A kind of motor-direct-drive type winding plant and large excavator |
| CN111987827A (en) * | 2020-08-20 | 2020-11-24 | 重庆赛力盟电机有限责任公司 | Low-speed load direct-drive permanent magnet motor |
| CN109667303B (en) * | 2019-01-29 | 2024-05-03 | 北京大圣格尔冶金设备有限公司 | Motor direct-drive type hoisting device and large excavator |
-
2009
- 2009-09-18 CN CN2009202034685U patent/CN201577011U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101980429A (en) * | 2010-11-02 | 2011-02-23 | 张家港倍恩特磁塑科技有限公司 | Method for manufacturing oriented magnetic field in plastic magnetic rotor mold |
| CN106533055A (en) * | 2016-12-30 | 2017-03-22 | 哈尔滨三跃驱动技术股份有限公司 | Low-speed permanent-magnet direct-driving system for rubber mixing machine |
| CN109667303A (en) * | 2019-01-29 | 2019-04-23 | 北京大圣格尔冶金设备有限公司 | A kind of motor-direct-drive type winding plant and large excavator |
| CN109667303B (en) * | 2019-01-29 | 2024-05-03 | 北京大圣格尔冶金设备有限公司 | Motor direct-drive type hoisting device and large excavator |
| CN111987827A (en) * | 2020-08-20 | 2020-11-24 | 重庆赛力盟电机有限责任公司 | Low-speed load direct-drive permanent magnet motor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20160918 |