CN205397245U - Scraper blade machine low -speed partly directly drives permanent magnetism driving system - Google Patents
Scraper blade machine low -speed partly directly drives permanent magnetism driving system Download PDFInfo
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- CN205397245U CN205397245U CN201620156767.8U CN201620156767U CN205397245U CN 205397245 U CN205397245 U CN 205397245U CN 201620156767 U CN201620156767 U CN 201620156767U CN 205397245 U CN205397245 U CN 205397245U
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The utility model provides a scraper blade machine low -speed partly directly drives permanent magnetism driving system comprises permanent magnetism frequency conversion control system, PMSM and decelerator, through electric cable connect between permanent magnetism frequency conversion control system and PMSM, PMSM and decelerator integration, PMSM includes frame, winding stator, permanent magnet rotor, terminal box, rear end cap, back bearing assembly and preceding bearing assembly, decelerator include output shaft, output end cover, output ring gear, middle apron, input ring gear, input end cover and input planet subassembly constitution, decelerator's output end cover, output ring gear, middle apron and PMSM frame synthetic integrative, PMSM's output shaft as the input shaft of decelerator's elementary speed reduction end, no shaft coupling draw bail, decelerator slows down elementarily and holds the end cover to provide the support for PMSM's the end bearing assembly that rolls out.
Description
Technical field
This utility model relates to scrapper conveyor, specifically a kind of scrapper conveyor low-speed half direct-driven permanent-magnet drive system.
Background technology
Drag conveyor is the crucial transporting equipment that in fully-mechanized mining working, working condition is severe, load state is complicated.Owing to difficulty starts, load change is acutely, during multimachine drives, each motor load distributes the problems such as unbalance and the hunting of load, cause stress in drag conveyor drive system and chain assemblies excessive, the severity that is hit makes chute serious wear even burn-down of electric motor damage, and directly affects reliability and the life-span of drag conveyor.
China develops drag conveyor system from 20 century 70s mid-term, and initial driving device is single speed asynchronous machine+limiter square coupling device.Use load limiting type of constant filling fluid coupling, it is possible to making the smooth acceleration of motor, thus reducing the voltage drop of electrical network, making the startability of drag conveyor be improved, can also balanced power during multi-motor driving.But adopting this type of drive to require the Proper Match of drive motor and fluid-flywheel clutch associated working, an essential condition is to grasp filling amount.Operator needs have the skill expertly carrying out filling amount adjustment; when overload; transmission efficiency reduces, and coupling device driving medium temperature increases continuing, and quickly reaches the protection temperature of coupling device fusible plug; cause coupling device hydrojet; in drag conveyor running time unexpected " vexed car ", coupler rotor medium reached " burning-point " in tens seconds, now hydrojet; have and cause the possibility caught fire, so that bringing safety problem.Early 1980s, China ore deposit, because there is fluid-flywheel clutch fire casualty, causes great casualties.After change into fire resistant liquid for working media, although solve safety problem, but also bring new problem simultaneously, emulsion is not suitable for hot operation, the situations such as oil-water separation occurs, adopts clear water, add again difficulty to bearing lubrication, greatly reduce the service life of coupling device.
To the later stage eighties 20th century, China starts to develop double-speed motor, using it as the driving device of drag conveyor.Double-speed motor is the one of AC induction motor, there are low and high two kinds of speed, it it is the number of poles changing motor by changing the connection of motor stator winding, thus obtaining different rotating speed, torque characteristic, when low speed winding starts, its staring torque can equal to or higher than moment when high speed winding starts with relatively high power, and starting current greatly reduces, reduce the electric current of electrical network supply during startup, make line voltage drop and be substantially reduced.Double-speed motor driving device has good startability, efficiently solves starting with full load problem, the accident such as " vexed car ", chain rupture in improving drag conveyor difficulty in starting and running.
Fluid-flywheel clutch is owing to can protecting motor and improving the startability of motor, thus is widely applied in China.But, along with improving constantly of drag conveyor transport capacity, power constantly increases, and drives for heavy-duty motor, and fluid-flywheel clutch just shows some weak point.Owing to the output torque of fluid-flywheel clutch is directly proportional to the effective diameter of impeller, thus with the load limiting type of constant filling fluid coupling of heavy-duty motor mating reaction, its diameter of one side is very big, be not suitable for using at work surface, its area of dissipation is also inadequate on the other hand, causes heat radiation bad, and temperature rise is too high.Therefore, when power is very big, fluid-flywheel clutch is no longer applicable.The problem relatively low for solving drag conveyor driving device reliability, can use double-speed motor.By the early 21st century, the mode directly driven with double-speed motor on high-power drag conveyor has replaced single-speed motor gradually and has joined the type of drive of load limiting type of constant filling fluid coupling.
Along with China coal industry high speed development, the requirement of drag conveyor drive system is also more and more higher, drag conveyor difficulty starts, the unequal problem of load is also prominent all the more, and conventional ADS driving mode has not adapted to driving and the service requirement of drag conveyor, there is problem highlighted below.
1) difficult startup.The randomness stopped due to drag conveyor and the huge petty action of load and other equipment of production system, often result in conveyer hang-up, it is often necessary to restart drag conveyor under heavy loads, and the situation of difficulty in starting often occurs.
2) powerful mechanical shock.The general motor starting with full load time is 4-6s, and starting loop is up to 0.2-0.3m/s2.The drive system of drag conveyor is despite certain pretightning force, and during shutdown, drive system is relaxed state, and links has certain gap, and chain is elastomer.Electric motor starting moment, in the process overcoming gap and chain to stretch, whole drive system causing powerful mechanical shock, almost all of actuated element is subjected to impact stress in this process.When double-speed motor drives, low speed joint change to and also can produce mechanical shock at a high speed.
3) impact of big Current on Grid.When band load starts, asynchronous machine starting current reaches the rated current of 6～8 times, sometimes even bigger; cause that line voltage declines, affect the startability of drag conveyor, affect the properly functioning of other equipment on electrical network simultaneously; cause other equipment under-voltage protections, cause misoperation.The frequent starting of drag conveyor, can make motor heating in winding, thus accelerating insulation ag(e)ing, affects electrical machinery life.
4) many motor driving powers are unbalanced.Due to load distribution variation and chain tension change on Rated motor parameter differences and chain pitch change, conveyer, there is serious power of motor imbalance problem, it is impossible to give full play to the effect of configuration power.Entering lower test result to show, the output of frame head and tail two driving section motor is alternate, and drag conveyor total power input is far below configuration power, but for single motor, there is again in short-term frequently overloading.For superduty drag conveyor, load problem of non-uniform can be more prominent.
5) overload impact.Owing to the longitudinal direction in chaindriven polygon effect, chain road rises and falls and horizontal curvature, swipe, impact phenomenon in the dynamic row of drag conveyor are very serious and frequent, very easily cause the actuated element such as overload breakage such as chain, gear, time serious, cause the vexed car of motor, motor damage.
Since 20 century 70s; external many research institutions adopt the controllable driving device of multiple technologies approach experimental study drag conveyor; i.e. soft starting device; for soft start starts relative to rigidity; it is compared with the hard reboot of rigid connection; soft start can make motor realize No Load Start under drag conveyor full load conditions; after reaching rated speed; properly functioning without impacting ground drive total system gradually again; the starting current excessive impact to electrical network when preventing motor overload, and there is overload protection performance.External advanced coveyor drive many employings soft Starting Technology, mainly there are valve control liquid-filled fluid-flywheel clutch, CST controllable initiating transmission system etc. at the initial stage, and its feature is as follows.
1) technical characteristics of valve control liquid-filled fluid-flywheel clutch
A. No Load Start and the overload protection of drag conveyor can be realized.
B. pass through to change water and can realize the frequent starting of drag conveyor, without restriction initiation culture.
C. can realize the sequence starting under multimachine drives by the topping up order of change fluid-flywheel clutch, be realized the load balance under multimachine drives by the self character of coupling device.
D. can realize testing at a slow speed chain.
E. two-chamber design, compact conformation, power transfer section part mechanical contacts, and reliability is high.
F. using clear water as working solution, safe ready and also cheap, it is possible to by water pipe and cistern water supply, by positive displacement pump bank of tubes water, discharge opeing pressure is driven hydraulic circular to produce by mair motor, directly water circulation is controlled by intrinsic safety type guide's combination valve.
G., when not affecting power transmission, dispel the heat by changing water.
2) technical characteristics of CST controllable initiating transmission system
A. can following the tracks of any start up curve under Arbitrary Loads, acceleration-deceleration arbitrarily regulates.
B., for variable speed fluid coupling, transmission efficiency is high.
C. there is the controlled stop capability under any condition.
D. can realizing high-precision power-balance between Multipoint Drive, balance quality is up to 98%.
E. providing overload protection to all machinery of conveyer, electrical system, protection system response time is fast.
F. can low cruise for a long time, it is achieved test at a slow speed chain.
G. field adjustable is simple, it is possible to carry out parameter modification and debugging easily online.
But because of the domestic technology that there is no maturation and product, so the soft starting device that domestic high-power drag conveyor adopts is all imported product.Valve control liquid-filled fluid-flywheel clutch is relatively general in China's application, but its price is higher, and delivery cycle is long, and later maintenance, maintenance cost are all very high.CST controllable initiating transmission system is only applied on the drag conveyor of Caterpillar, not for sale.
The driving of typical high power drag conveyor is based on variable speed fluid coupling, it is possible to achieve soft start, but system complex, maintenance workload is big, and maintenance cost is high, and cannot work long hours in the low-speed mode.Along with the development of science and technology, converter technique is increasingly widespread in the application of industrial circle, and Application of frequency conversion technique is also increasingly mature in coal mine scraper conveyor.The introducing of converter technique facilitates implementation mine Automated condtrol, it is achieved chain rupture protection shutdown and power of motor balance etc., eliminates variable speed fluid coupling, adopts and wheel is coupled, improves the mechanical efficiency of equipment.Colliery realizes digital management simultaneously provide convenience condition.Frequency control, as the focus of current soft Starting Technology research and application, has 2 kinds of implementations: a kind of integrated asynchronous motor supplied with variable frequency, its price is higher and Lead Time is longer；Another kind is split type variable frequency speed modulation of asynchronous motor system, and this product has obtained application in colliery.
From the development course of drag conveyor actuation techniques, it is be connected, with fluid coupling mechanism, the direction being connected with asynchronous machine, reductor to converter along asynchronous machine to develop.But, startup that variable frequency speed modulation of asynchronous motor system is difficult to low speed high torque and the operating mode heavily transshipped.And then occur that starting current is excessive under heavy loads, or frequently heavy load starting, run the situations such as unexpected overload, converter or asynchronous machine is caused to burn, meanwhile, asynchronous machine, reductor are all operated in fast state, cause unreliable operation and service life to shorten.
Along with the development of permanent-magnetic variable-frequency technology, domestic direct drive permanent magnetic synchronous motor frequency conversion speed-adjusting system has been successfully applied to wind-power electricity generation, coal mine leather belt conveyer system etc., and achieves good operational effect.Make direct drive permanent magnetic synchronous motor frequency conversion speed-adjusting system in drag conveyor without technology barriers.But for high-power drag conveyor system, under existing coal winning technology and coal excavation apparatus situation, the permagnetic synchronous motor directly technology of driving is not suitable for being used in drag conveyor system, because lower permagnetic synchronous motor volume takies bigger under this working condition, without installing space, not there is feasibility.
Meanwhile, at home and abroad not yet occur, by permagnetic synchronous motor and reducing gear effective integration, coordinating frequency-changing control system in order to drag the precedent of scrapper conveyor.
On motor type divides, permagnetic synchronous motor belongs to synchronous motor, and its operation characteristic is that detent torque is high, overload performance is strong, high efficiency region is broad, and owing to permanent magnet material magnetic energy product is high, can make in equal torque situation, reduce about 30% than asynchronous machine volume.For rotating machinery, rotating speed is high, and moment is big simultaneously, is the principal element affecting reliability and life-span, too increases difficulty of processing and material cost simultaneously.
As can be seen here, by by low speed permanent magnet synchronous motor and low-range reduction device organic integration, not only solving the installation volume problem of driving device, also achieve the features such as the low speed required by scrapper conveyor, high torque (HT), high efficiency.
Summary of the invention
The purpose of this utility model provides a kind of scrapper conveyor low-speed half direct-driven permanent-magnet drive system, and this system is controlled system by permanent-magnetic variable-frequency and low-speed half direct-driven permagnetic synchronous motor forms.Wherein, permagnetic synchronous motor and the integrated composition of deceleration device, by the Proper Match of motor Yu deceleration device so that the system bulk after integrated is little, lightweight, while possess again the performances such as the high torque (HT) of synchronous motor, high overload, high efficiency.
This utility model solves the technical scheme is that half directly-drive permanent magnet drive system of its technical problem and is controlled system, permagnetic synchronous motor and deceleration device by permanent-magnetic variable-frequency and form；Permagnetic synchronous motor is integrated with deceleration device；Described permagnetic synchronous motor includes support, wound stator, p-m rotor, rosette, rear end cap, rear bearing assembly and fore bearing assembly；Described deceleration device includes output shaft, outfan end cap, outfan gear ring, inter panel, input gear ring, input end cap and input planetary assemblies；The outfan end cap of described deceleration device, outfan gear ring, inter panel and permagnetic synchronous motor support are integrator；The output shaft of described permagnetic synchronous motor is as the power shaft of the primary deceleration end of deceleration device, without shaft coupling draw bail；What described deceleration device primary deceleration end end cap was permagnetic synchronous motor produces end bearing assembly provides support.
The beneficial effects of the utility model are:
The asynchronous machine of original system is replaced to permagnetic synchronous motor, its output characteristics is made to be more suitable for the duty requirements of scrapper conveyor, meanwhile, reduce the rated speed of motor, improve reliability and service life, and then reduce the input speed of deceleration device, improve its reliability and service life equally, it addition, permagnetic synchronous motor is integrated with deceleration device, shortening driving-chain, volume is smaller and more exquisite, compact.Reduction unit output shaft couples with scrapper conveyor sprocket shaft group, and this kind of driving device shortens drive system driving-chain, takes up room little, lightweight, decreases equipment installation, transport, maintenance cost, has excellent control characteristic simultaneously.Integrated half directly-drive permanent magnet drive system has the property that
1) mild nothing impact, reliability height are started.
2) control realization principal and subordinate follows, it is achieved torque and velocity balance.
3) passing through regulating frequency, it is achieved soft open, soft stop, starting current is little.
4) electric efficiency is about 97%, and power factor is close to 1, and the scope with rotation speed change is little.
5) controlled by appropriate, it is achieved torque and speed regulate.
6) speed adjustable range 0-120%.
Accompanying drawing explanation
Fig. 1 is described scrapper conveyor half directly-drive permanent magnet driving system structure sketch.
Fig. 2 is permagnetic synchronous motor and the integrated structure chart of deceleration device in described scrapper conveyor half directly-drive permanent magnet drive system.
In figure, 1. permanent-magnetic variable-frequencies control system, 2. cable, 3. permagnetic synchronous motor, 31. support, 32. wound stator, 33. p-m rotors, 34. fore bearing assembly, 35. rear bearing assemblies, 36. rear end caps, 37. rosette, 4. deceleration device, 41. output shafts, 42. outfan end cap, 43. bolts, 44. outfan gear rings, 45. inter panel, 46. input gear rings, 47. input end caps.
Detailed description of the invention
In Fig. 1, permanent-magnetic variable-frequency controls to be connected by cable 2 between system 1 and permagnetic synchronous motor 3, and permagnetic synchronous motor 3 is integrated with deceleration device 2.
In Fig. 2, by bolt 43, the support 31 of permagnetic synchronous motor 3, outfan end cap 42, outfan gear ring 44 and inter panel 45 are fixed together, input end cap 47 and input gear ring 44 are fixed on inter panel 45, wound stator 32 is fixed in support 31, fore bearing assembly 34 is fixed on input end cap 47, rear bearing assembly 35, rear end cap 36 are fixed with support 31, fore bearing assembly 34 and rear bearing assembly 35 common support p-m rotor 33, and rosette 37 provides external impetus cable connection.
For 2 grades of deceleration devices, Fig. 2 states that described scrapper conveyor driving device embodiment, single-stage or the multiple-stage reduction unit of more than 2 grades and the device being integrated into driving in such a manner of permagnetic synchronous motor also should be regarded as belonging to present patent application protection domain.
Claims (7)
1. a scrapper conveyor low-speed half direct-driven permanent-magnet drive system, is characterized in that: described half directly-drive permanent magnet drive system is controlled system, permagnetic synchronous motor and deceleration device by permanent-magnetic variable-frequency and forms.
2. a kind of scrapper conveyor low-speed half direct-driven permanent-magnet drive system according to claim 1, is characterized in that: permagnetic synchronous motor is integrated with deceleration device.
3. a kind of scrapper conveyor low-speed half direct-driven permanent-magnet drive system according to claim 1, is characterized in that: described permagnetic synchronous motor includes support, wound stator, p-m rotor, rosette, rear end cap, rear bearing assembly and fore bearing assembly.
4. a kind of scrapper conveyor low-speed half direct-driven permanent-magnet drive system according to claim 1, is characterized in that: described deceleration device includes output shaft, outfan end cap, outfan gear ring, inter panel, input gear ring, input end cap and input planetary assemblies composition.
5. a kind of scrapper conveyor low-speed half direct-driven permanent-magnet drive system according to claim 1, is characterized in that: the outfan end cap of described deceleration device, outfan gear ring, inter panel and permagnetic synchronous motor support are integrator.
6. a kind of scrapper conveyor low-speed half direct-driven permanent-magnet drive system according to claim 1, is characterized in that: the output shaft of described permagnetic synchronous motor is as the power shaft of the primary deceleration end of deceleration device, without shaft coupling draw bail.
7. a kind of scrapper conveyor low-speed half direct-driven permanent-magnet drive system according to claim 1, is characterized in that: what described deceleration device primary deceleration end end cap was permagnetic synchronous motor produces end bearing assembly provides support.
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| CN201620156767.8U CN205397245U (en) | 2016-03-02 | 2016-03-02 | Scraper blade machine low -speed partly directly drives permanent magnetism driving system |
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| CN201620156767.8U CN205397245U (en) | 2016-03-02 | 2016-03-02 | Scraper blade machine low -speed partly directly drives permanent magnetism driving system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105564899A (en) * | 2016-03-02 | 2016-05-11 | 北京百正创源科技有限公司 | Low velocity semi-direct-drive permanent magnet driving system for scrapper machine |
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- 2016-03-02 CN CN201620156767.8U patent/CN205397245U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105564899A (en) * | 2016-03-02 | 2016-05-11 | 北京百正创源科技有限公司 | Low velocity semi-direct-drive permanent magnet driving system for scrapper machine |
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Address after: Room 811, 8th Floor, Building 1, Courtyard 59, Gaoliangqiao Xie Street, Haidian District, Beijing, 100044 Patentee after: BEIJING BETECH CO.,LTD. Address before: 8th Floor, No. 79 Suzhou Street, Haidian District, Beijing, 100089 Patentee before: BEIJING BETECH CO.,LTD. |