CN102527478A - Ball grinder capable of achieving mechanical type soft starting - Google Patents
Ball grinder capable of achieving mechanical type soft starting Download PDFInfo
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- CN102527478A CN102527478A CN201210018996XA CN201210018996A CN102527478A CN 102527478 A CN102527478 A CN 102527478A CN 201210018996X A CN201210018996X A CN 201210018996XA CN 201210018996 A CN201210018996 A CN 201210018996A CN 102527478 A CN102527478 A CN 102527478A
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Abstract
The invention discloses a ball grinder capable of achieving mechanical soft starting. The ball grinder comprises an auxiliary motor, a pinion wheel speed reducer, a brake, a gearwheel speed reducer, a hydrodynamic coupler and a driving motor, wherein one end of the input shaft of the gearwheel speed reducer is connected with the driving motor through the hydrodynamic coupler, the other end of the input shaft of the gearwheel speed reducer is connected with the output shaft of the pinion wheel speed reducer, the input shaft of the pinion wheel speed reducer is connected with the auxiliary motor, the output shaft of the gearwheel speed reducer is connected with the cylinder body of the ball grinder, the brake is arranged on the input shaft of the gearwheel speed reducer, and an overrunning clutch is connected between the output shaft of the pinion wheel speed reducer and the input shaft of the gearwheel speed reducer. The ball grinder is full-automatic starting equipment and has the benefits as follows: the starting torque and the starting current are small, manual intervention is not required during the starting process, mechanical damages caused by improper handling can be avoided, the price is low, and the starting current is moderate.
Description
Technical field:
The present invention relates to a kind of ball mill of realizing the mechanical type soft start.
Background technology:
Ball mill barrel rotated the process that reaches rated speed after the startup of ball mill was and loads.When motor has just started; Because the electric current formed rotating excitation field of motor stator has very big relative rotation speed to static motor rotor; The speed of the magnetic force line cutting motor rotor conductor that obvious rotating excitation field is produced is very big, so will produce very big induced current in the motor rotor winding.Can know that according to electromagnetic induction principle also can produce very big induced electromotive force and induced current in the motor stator this moment is (the actual immediate current I of motor
s).The immediate current I that medium-sized threephase asynchronous commonly used starts
sWith rated current I
nRatio be 6～7.Increase motor current I along with the ball mill barrel rotating speed
sReduce finally to reach rated current I
nBelow.Though ball mill active motor can obtain 1.0～2.5 times nominal torque when directly starting; Helping ball mill overcomes static inertia and reaches the state of rotatablely moving; But the power factor (PF) of the gear reduction unit gear being impacted big and this moment of rotor winding is very low, and excessive starting current can cause the bigger loss of voltage in supply line, cause the reduction of motor load terminal voltage; And influence closes on the operate as normal etc. of load equipment, even damages power supply unit such as transformer.This phenomenon is of common occurrence in production practices.Therefore it is less to find out a kind of starting current, and has and suitable affect torque very necessary with the device that starts ball mill stably.
The Starting mode of existing ball mill has: directly startup, star triangle reduced-voltage starting, auto-coupling startup, the automatically controlled soft start of current-limiting type and variable frequency starting.Its performance basic parameter is following: (remarks M
nThe motor nominal torque)
The mechanical part of existing Starting mode is seen accompanying drawing 1, and its operating sequence is following:
Ball mill is filled it up with the manual clutch shift fork 01 that at first closes behind the raw material; Drive cylindrical shell 05 by stand-by motor 02 after through the deceleration of large and small gear reduction unit 03,04 and rotate several weeks with per minute several speed that forward several commentaries on classics at zero point; Be evenly distributed in (shown in accompanying drawing 2) in the cylindrical shell to raw material and ballstone, the moment load when helping like this to reduce initiatively motor 06 startup.Stop stand-by motor 02 then, separate manual clutch shift fork 01; Restart initiatively motor 06, drive the speed grinding raw material (adopting 15～26 rpms rotating speed usually) that ball mill barrel 05 turns left right with per minute 20 after active motor 06 slows down through bull gear reducer 03.There is following defective in existing Starting mode in the ball mill start-up course:
1. with the clutch that need manually close before the even raw material of deceleration of stand-by motor through two gear reduction units of size, evenly need the manual separation clutch behind the raw material.Do not stop stand-by motor and often occur the operator in the practical operation, cut-off clutch just starts the initiatively phenomenon of motor, causes the damage of stand-by motor and gear reduction unit and this phenomenon of common occurrence.The clutch that manually closes simultaneously, shift fork are inserted and are not in placely just started stand-by motor, or clutch not break away from fully and just starts main motor, and shift fork often damages, and also often causes mechanical breakdown.
2. directly startup, star triangle start and auto-coupling startup belong to has level to start, and can produce mechanical shock when the level startup is arranged.Ball mill is from static startup, and initiatively to overcome the required staring torque of static inertia big for motor, start moment the gear reduction unit gear is impacted big, if the material skewness often occurs in the ball mill barrel or the phenomenon that overloads will cause that gear reduction unit collapses tooth.Automatically controlled soft start of current limliting and variable frequency starting are respectively to adopt transistor current limiting element and frequency conversion to come slowly to increase the startup that electric moter voltage is realized ball mill; But do not have machinery and impact cost an arm and a leg and in the long time, can't make cylindrical shell reach rated speed if belong to stepless startup, electrical part heating overwork can be burnt electric elements.
3. ball mill is fully loaded the startup, and existing startup all is need overcome static inertia from static startup, and the moment when ball mill starts during required torque ratio operate as normal is big.Though it is big but because there is the excessive defective of starting current in it, only be fit to the micro-machine below 30 kilowatts in the practical application directly to start staring torque.And all the other two kinds modes that have level to start through direct reduction voltage have reduced starting current, but staring torque also reduces thereupon, if situation such as material skewness can't start ball mill in the ball mill overload, cylindrical shell, even burn out initiatively motor.At this moment stepless Starting mode start-up time long phenomenon also can occur and burn electric elements easily, causes bigger economic loss.
Summary of the invention:
The objective of the invention is in order to overcome the shortcoming of above-mentioned prior art, the ball mill that a kind of cost is low, can realize the mechanical type soft start is provided.
For realizing above-mentioned purpose; Technical scheme provided by the invention is: a kind of ball mill of realizing the mechanical type soft start; Include stand-by motor, pinion deceleration machine, brake, bull gear reducer, fluid coupling and active motor, an end of bull gear reducer power shaft is connected through fluid coupling with the active motor, and the other end is connected with the output shaft of pinion deceleration machine; The power shaft of pinion deceleration machine is connected with stand-by motor; The output shaft of bull gear reducer is connected with ball mill barrel, and brake is located on the bull gear reducer power shaft, between pinion deceleration machine output shaft and bull gear reducer power shaft, is connected with freewheel clutch.
Beneficial effect of the present invention: with being arranged, the level startup compares, the ball mill start-up course, staring torque and starting current are little; And start and not need artificial the intervention midway, avoid occurring misoperation and cause mechanical failure, utilize the mating reaction of stand-by motor and freewheel clutch; Ball mill barrel is started become easily, and can prevent the generation that can't start, compare with stepless starting device; Can reduce manufacturing cost, be a kind of cheap, full-automatic starting device that starting current is moderate.
Description of drawings:
Fig. 1 is the structural representation of prior art ball mill;
Fig. 2 is the structural representation before the batch mixing in the ball mill barrel of the present invention;
Fig. 3 is the structural representation behind the batch mixing in the ball mill barrel of the present invention;
Fig. 4 is the structural representation of ball mill of the present invention;
Fig. 5 is electric current and the time Line Chart that traditional ball mill zero load directly starts, is fully loaded with the mechanical soft start of directly startup and present technique scheme.
The specific embodiment:
Below in conjunction with the one-shot process of accompanying drawing patent of the present invention is described further with ball mill.
The ball mill of this mechanical type soft start comprises stand-by motor 1, shaft coupling 2, pinion deceleration machine 3, freewheel clutch 4, brake 5, bull gear reducer 6, fluid coupling 8, active motor 9 and cylindrical shell 7; Power shaft one end of bull gear reducer 6 is connected with active motor 9 through fluid coupling 8; The other end be connected through the output shaft of freewheel clutch 4 with pinion deceleration machine 3; Stand-by motor 1 is connected with pinion deceleration machine 3 power shafts through shaft coupling 2; The output shaft of bull gear reducer 6 and cylindrical shell 7 are in transmission connection, and brake 5 is located on bull gear reducer 6 power shafts.
Ball mill is filled it up with behind the raw material and to be driven cylindrical shell after the at first deceleration of stand-by motor 1 through pinion deceleration machine 3 and bull gear reducer 6 and rotated ten minutes with per minute several speed that forward several commentaries on classics at zero point, is evenly distributed in cylindrical shell 7 interior (shown in accompanying drawing 3) to raw material 1a mixed and disorderly in the cylindrical shell 7 and stone ball 1b (as shown in Figure 2).Simultaneously stand-by motor 1 also drives the speed rotation that the rotor of motor 9 initiatively turns left right with per minute 150 through pinion deceleration machine 3.This moment is the not energising of excitation of motor 9 initiatively, and initiatively motor 9 can not produce electromagnetic induction, so resistance is very little.Stand-by motor 1 operation is after ten minutes; Start initiatively motor 9 simultaneously; At this moment initiatively the rotor of motor 9 rotates and can know according to the description in the technical background doing circumference: the electric current formed rotating excitation field of motor stator reduces the relative rotation speed of motor rotor, and this moment, initiatively the starting current of motor 9 also reduced thereupon.Ball mill barrel 7 has been kept in motion simultaneously, and initiatively motor 9 need not overcome static inertia, so initiatively motor 9 electric currents descend very fast.Starting current reduces significantly, and output torque reduces, and the gear reduction unit gear is hit and also reduces thereupon.When active motor 9 quickens the rotation of cylindrical shell 7 through the speed change of fluid coupling 8 and bull gear reducer 6; When cylindrical shell 7 speed surpass the speed that stand-by motor 1 driven; Freewheel clutch 4 generation effects; Stand-by motor 1 is no longer to bull gear reducer 6 power outputs, and idle running appears in stand-by motor 1, and at this moment controller will cut out the power supply of stand-by motor 1 automatically.Initiatively 9 pairs of cylindrical shells of motor 7 quicken after rated speed, to do uniform rotation.The switching transmission of whole process stand-by motor 1 and active motor 9 need not the manually-operated intervention and has reduced the accident odds.
Below in conjunction with the unloaded mechanical soft start that directly starts, is fully loaded with directly startup and present technique scheme of traditional ball mill, the electric current of start-up course-time approximately linear figure does contrast (shown in the accompanying drawing 5).
Ball mill No Load Start moment, initiatively the speed of the rotating excitation field of motor stator cutting motor stationary rotor is big, produces very big immediate current, but because be unloaded, electric current descends and in the time of extremely lacking, is reduced to below the rated value very soon, like a line among Fig. 5.Though the time is short not to be had injury to motor itself but there is impact in electrical network, electric equipment that the running that can influence load end equipment is more particularly had relatively high expectations to voltage stability such as computer etc.
Ball mill is fully loaded with and directly starts moment, and shown in b line among Fig. 5, initiatively the speed of the rotating excitation field of motor stator cutting motor stationary rotor is big, produces very big immediate current.Because ball mill is fully loaded, it remains static before the startup simultaneously, and initiatively motor need overcome the static inertia of ball mill barrel, so initiatively motor load reduces electric current decline slowly to the acceleration of cylindrical shell rotation greatly.Along with the decline motor output torque of electric current also reduces thereupon, then main motor drives cylindrical shell with a constant moment and does uniformly accelerated motion, and this moment, current of electric also remained unchanged.Quicken a period of time rear cylinder body rotary speed and reach rated value, cylindrical shell is done uniform rotation, and current of electric decline output torque reduces, until the moment of resistance of balance cylindrical shell uniform rotation.Not only the big decrease speed of starting current is slow but also the duration is longer for this process, and is very big to whole electrical network impact, influenced electrical machinery life, forms serious harm.
The startup moment of the fully loaded mechanical soft start of ball mill, like c line among Fig. 5, because of the rotor of active motor is rotating, initiatively the speed of the rotating excitation field cutting rotor of motor stator reduces, and can know that according to electromagnetic induction principle starting immediate current reduces.Ball mill barrel has been in rotation status simultaneously, and initiatively motor need not to overcome the static inertia of ball mill, and required output torque reduces.Electric current is very fast down.Cylindrical shell is done the uniformly accelerated motion of a period of time with rear motor, this moment, current constant reached rated speed until cylindrical shell again, and electric current drops to a definite value once more and no longer changes.The whole starting process time is shorter, starts immediate current and reduces significantly, and the electric current decrease speed is very fast, the motor life-span itself is not had influence improved the impact to electrical network simultaneously greatly.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Any those of ordinary skill in the art; Do not breaking away under the technical scheme scope situation of the present invention; All the method for above-mentioned announcement capable of using and technology contents are made many possible changes and modification to technical scheme of the present invention, or are revised as the equivalent embodiment of equivalent variations.So every content that does not break away from technical scheme of the present invention, the equivalence of doing according to the present invention's shape, structure and principle changes, and all should be covered by in protection scope of the present invention.
Claims (1)
1. the ball mill that can realize the mechanical type soft start; Include stand-by motor, pinion deceleration machine, brake, bull gear reducer, fluid coupling and active motor; One end of bull gear reducer power shaft is connected through fluid coupling with the active motor; The other end is connected with the output shaft of pinion deceleration machine, and the power shaft of pinion deceleration machine is connected with stand-by motor, and the output shaft of bull gear reducer is connected with ball mill barrel; Brake is located on the bull gear reducer power shaft, it is characterized in that: between pinion deceleration machine output shaft and bull gear reducer power shaft, be connected with freewheel clutch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210018996.XA CN102527478B (en) | 2012-01-20 | 2012-01-20 | Ball grinder capable of achieving mechanical type soft starting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210018996.XA CN102527478B (en) | 2012-01-20 | 2012-01-20 | Ball grinder capable of achieving mechanical type soft starting |
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| CN102527478A true CN102527478A (en) | 2012-07-04 |
| CN102527478B CN102527478B (en) | 2014-06-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102861642A (en) * | 2012-09-12 | 2013-01-09 | 江西稀有金属钨业控股集团有限公司 | Low-speed transmission device of mill |
| CN102862408A (en) * | 2012-09-29 | 2013-01-09 | 佛山市维克卫浴科技有限公司 | Inkjet printing method of bathroom product |
| CN105597881A (en) * | 2015-11-03 | 2016-05-25 | 高斌 | Batch-type ball mill |
| CN106999939A (en) * | 2014-12-16 | 2017-08-01 | 山特维克知识产权股份有限公司 | Many driving disintegrating machines |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4315439A (en) * | 1979-06-07 | 1982-02-16 | Krupp Polysius Ag | Drive apparatus for rotary unit |
| CN2254378Y (en) * | 1996-03-19 | 1997-05-21 | 济南重机集团公司 | Slow-speed rotating unit for ball mill |
| CN2468590Y (en) * | 2001-02-23 | 2002-01-02 | 何树明 | Gearing device for tube milling machine |
| CN2805925Y (en) * | 2005-04-28 | 2006-08-16 | 沈阳重型机械集团有限责任公司 | Large-sized vertical roll mill |
| CN2841148Y (en) * | 2005-10-20 | 2006-11-29 | 王明龙 | The ore dressing ball mill |
| CN101274299A (en) * | 2008-05-14 | 2008-10-01 | 贵州开磷（集团）有限责任公司 | Method for starting and controlling ball mill |
| CN201239640Y (en) * | 2008-08-09 | 2009-05-20 | 段志禹 | Pulverizing grinder |
| CN201807412U (en) * | 2010-07-28 | 2011-04-27 | 江阴市中立机械工业有限公司 | Special rod mill for coal water slurry |
| CN202410767U (en) * | 2012-01-20 | 2012-09-05 | 广东摩德娜科技股份有限公司 | Ball grinding mill capable of achieving mechanical soft start |
-
2012
- 2012-01-20 CN CN201210018996.XA patent/CN102527478B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4315439A (en) * | 1979-06-07 | 1982-02-16 | Krupp Polysius Ag | Drive apparatus for rotary unit |
| CN2254378Y (en) * | 1996-03-19 | 1997-05-21 | 济南重机集团公司 | Slow-speed rotating unit for ball mill |
| CN2468590Y (en) * | 2001-02-23 | 2002-01-02 | 何树明 | Gearing device for tube milling machine |
| CN2805925Y (en) * | 2005-04-28 | 2006-08-16 | 沈阳重型机械集团有限责任公司 | Large-sized vertical roll mill |
| CN2841148Y (en) * | 2005-10-20 | 2006-11-29 | 王明龙 | The ore dressing ball mill |
| CN101274299A (en) * | 2008-05-14 | 2008-10-01 | 贵州开磷（集团）有限责任公司 | Method for starting and controlling ball mill |
| CN201239640Y (en) * | 2008-08-09 | 2009-05-20 | 段志禹 | Pulverizing grinder |
| CN201807412U (en) * | 2010-07-28 | 2011-04-27 | 江阴市中立机械工业有限公司 | Special rod mill for coal water slurry |
| CN202410767U (en) * | 2012-01-20 | 2012-09-05 | 广东摩德娜科技股份有限公司 | Ball grinding mill capable of achieving mechanical soft start |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102861642A (en) * | 2012-09-12 | 2013-01-09 | 江西稀有金属钨业控股集团有限公司 | Low-speed transmission device of mill |
| CN102862408A (en) * | 2012-09-29 | 2013-01-09 | 佛山市维克卫浴科技有限公司 | Inkjet printing method of bathroom product |
| CN102862408B (en) * | 2012-09-29 | 2014-06-18 | 佛山市维克卫浴科技有限公司 | Inkjet printing method of bathroom product |
| CN106999939A (en) * | 2014-12-16 | 2017-08-01 | 山特维克知识产权股份有限公司 | Many driving disintegrating machines |
| CN105597881A (en) * | 2015-11-03 | 2016-05-25 | 高斌 | Batch-type ball mill |
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| CN102527478B (en) | 2014-06-04 |
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