CN102527478B - Ball grinder capable of achieving mechanical type soft starting - Google Patents
Ball grinder capable of achieving mechanical type soft starting Download PDFInfo
- Publication number
- CN102527478B CN102527478B CN201210018996.XA CN201210018996A CN102527478B CN 102527478 B CN102527478 B CN 102527478B CN 201210018996 A CN201210018996 A CN 201210018996A CN 102527478 B CN102527478 B CN 102527478B
- Authority
- CN
- China
- Prior art keywords
- motor
- stand
- speed reducer
- gear reducer
- bull gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Motor And Converter Starters (AREA)
- Crushing And Grinding (AREA)
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 mechanical type soft starting.
Background technology:
After the startup of ball mill is and loads, ball mill barrel rotates the process that reaches rated speed.When motor has just started, because the electric current formed rotating excitation field of motor stator has very large relative rotation speed to static motor rotor, the speed of the magnetic force line cutting motor rotor conductor that obviously rotary magnetic place produces is very large, therefore in motor rotor winding, will produce very large induced current.Known according to electromagnetic induction principle, now in motor stator, also can produce i.e. (the actual immediate current I of motor of very large induced electromotive force and induced current
s).The immediate current I that conventional medium-sized threephase asynchronous starts
swith rated current I
nratio be 6～7.Along with the increase motor current I of ball mill barrel rotating speed
sreduce finally to reach rated current I
nbelow.Although ball mill active motor can obtain the nominal torque of 1.0～2.5 times while directly startup, being conducive to ball mill overcomes static inertia and reaches the state of rotatablely moving, but the power factor (PF) of gear reduction unit gear being impacted to rotor winding greatly and is now very low, excessive starting current can cause the larger loss of voltage in supply line, cause the reduction of motor load terminal voltage, and impact closes on the normal work etc. of load equipment, even damage the power supply units such as transformer.This phenomenon is of common occurrence in production practices.Therefore find out a kind of starting current less, and have and suitable affect torque very necessary to start stably the device of ball mill.
The Starting mode of existing ball mill has: directly startup, star delta reduced-voltage starting, auto-coupling startup, the automatically controlled soft start of current-limiting type and variable frequency starting.Its performance basic parameter is as follows: (remarks M
nmotor nominal torque)
The mechanical part of existing Starting mode is shown in accompanying drawing 1, and its operating sequence is as follows:
Ball mill is filled it up with the manual clutch shift fork 01 that first closes after raw material, drive afterwards cylindrical shell 05 severally to forward several speed of turning to and rotate several weeks zero point per minute by stand-by motor 02 by the deceleration of large and small gear reduction unit 03,04, raw material and ballstone are evenly distributed in to (as shown in Figure 2) in cylindrical shell, contribute to like this to reduce moment load when initiatively motor 06 starts.Then stop stand-by motor 02, separate manual clutch shift fork 01; Restart initiatively motor 06, initiatively motor 06 drives ball mill barrel 05 to grind raw material (conventionally adopting the rotating speed of 15～26 rpms) with per minute 20 speed that turn left right after slowing down by bull gear reducer 03.There is following defect in existing Starting mode in ball mill start-up course:
1. before the even raw material of deceleration by two gear reduction units of size, need manually to close clutch with stand-by motor, evenly after raw material, need manual separation clutch.And in practical operation, often occurring that operator does not stop stand-by motor, 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 simultaneously manually closes, shift fork is inserted and is not in placely just started stand-by motor, or clutch does not completely depart from 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 while having level startup, can produce mechanical shock.Ball mill is from static startup, and it is large that active motor overcomes the required staring torque of static inertia, starts moment large to the impact of gear reduction unit gear, if often occur that the interior material skewness of ball mill barrel or overloading will cause that gear reduction unit collapses tooth.The automatically controlled soft start of current limliting and variable frequency starting are respectively the startups that adopts transistor current limiting element and frequency conversion slowly to increase electric moter voltage to realize ball mill, but if belong to that stepless startup machinery-free impacts expensive and cannot make cylindrical shell reach rated speed within the longer time, electrical part heating overwork can be burnt electric elements.
3. ball mill is starting with full load, and existing startup is all need overcome static inertia from static startup, and moment when required torque ratio is normally worked when ball mill starts is large.Start staring torque greatly although direct but because it exists the excessive defect of starting current, in practical application, be only suitable for 30 kilowatts of following micro-machines.And all the other two kinds have level to start to have reduced starting current by the mode of direct reduction voltage, but staring torque also reduces thereupon, cannot start ball mill if there is situations such as material skewness in ball mill overload, cylindrical shell, even burns out initiatively motor.At this moment stepless Starting mode also there will be start-up time long phenomenon easily to burn electric elements, causes larger economic loss.
Summary of the invention:
The object of the invention is the shortcoming in order to overcome above-mentioned prior art, the ball mill that a kind of cost is low, can realize mechanical type soft starting is provided.
For achieving the above object, technical scheme provided by the invention is: a kind of ball mill of realizing mechanical type soft starting, include stand-by motor, pinion deceleration machine, brake, bull gear reducer, fluid coupling and initiatively motor, one end of bull gear reducer power shaft is connected by fluid coupling with active motor, 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, brake is located on bull gear reducer power shaft, between pinion deceleration machine output shaft and bull gear reducer power shaft, be connected with freewheel clutch.
Beneficial effect of the present invention: compared with having level startup, ball mill start-up course, staring torque and starting current are little, and start do not need manpower intervention midway, avoid occurring that misoperation causes mechanical failure, utilize the mating reaction of stand-by motor and freewheel clutch, ball mill barrel is started and become easily, and can prevent the generation that cannot start, compared with stepless starting device, can reduce manufacturing cost, be a kind of cheap, full-automatic starting device that starting current is moderate.
Accompanying drawing explanation:
Fig. 1 is the structural representation of prior art ball mill;
Fig. 2 is the structural representation before batch mixing in ball mill barrel of the present invention;
Fig. 3 is the structural representation after batch mixing in 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 the technical program.
The specific embodiment:
Patent of the present invention is described further with the one-shot process of ball mill below in conjunction with accompanying drawing.
The ball mill of this mechanical type soft starting comprises stand-by motor 1, shaft coupling 2, pinion deceleration machine 3, freewheel clutch 4, brake 5, bull gear reducer 6, fluid coupling 8, initiatively motor 9 and cylindrical shell 7, power shaft one end of bull gear reducer 6 is connected with active motor 9 by fluid coupling 8, the other end be connected with the output shaft of pinion deceleration machine 3 by freewheel clutch 4, stand-by motor 1 is connected with pinion deceleration machine 3 power shafts by shaft coupling 2, the output shaft of bull gear reducer 6 and cylindrical shell 7 are in transmission connection, brake 5 is located on bull gear reducer 6 power shafts.
First ball mill is filled it up with after raw material stand-by motor 1 and is driven afterwards cylindrical shell severally to forward several speed turning to and rotate ten minutes zero point per minute by the deceleration of pinion deceleration machine 3 and bull gear reducer 6, and interior cylindrical shell 7 mixed and disorderly raw material 1a and stone ball 1b (as shown in Figure 2) are evenly distributed in cylindrical shell 7 (as shown in Figure 3).Stand-by motor 1 also drives the initiatively rotor of motor 9 to rotate with per minute 150 speed that turn left right by pinion deceleration machine 3 simultaneously.Now initiatively the excitation of motor 9 is not switched on, and initiatively motor 9 can not produce electromagnetic induction, so resistance is very little.Stand-by motor 1 moved after ten minutes, start initiatively motor 9 simultaneously, at this moment initiatively the rotor of motor 9 to do circular-rotation known according to the description in technical background: the electric current formed rotating excitation field of motor stator reduces the relative rotation speed of motor rotor, and now initiatively the starting current of motor 9 also reduces thereupon.Ball mill barrel 7 has been kept in motion simultaneously, and initiatively motor 9 does not need to overcome static inertia, so initiatively motor 9 electric currents decline very fast.Starting current significantly reduces, and output torque reduces, and gear reduction unit gear is hit and also reduces thereupon.When the Spin-up of active motor 9 speed change by fluid coupling 8 and bull gear reducer 6 to cylindrical shell 7, when cylindrical shell 7 speed exceed the speed that stand-by motor 1 drives, freewheel clutch 4 generation effects, stand-by motor 1 is no longer to bull gear reducer 6 power outputs, there is idle running in stand-by motor 1, this Time Controller will be closed the power supply of stand-by motor 1 automatically.Initiatively motor 9 accelerates until do uniform rotation after rated speed cylindrical shell 7.The switching transmission of whole process stand-by motor 1 and initiatively motor 9 gets involved and has reduced accident odds without manual operation.
Below in conjunction with the unloaded mechanical soft start that directly starts, is fully loaded with directly startup and the technical program of traditional ball mill, electric current-time approximately linear figure of start-up course compares (shown in accompanying drawing 5).
Ball mill No Load Start moment, initiatively the speed of the rotating excitation field cutting electric machine stationary rotor of motor stator is large, produces very large immediate current, but because be unloaded, electric current declines and within the extremely short time, is reduced to below rated value very soon, as a line in Fig. 5.Although the time short to motor itself without injury but electrical network is existed and impacted, can affect electric equipment that the running of load end equipment more particularly has relatively high expectations to voltage stability as computer etc.
Fully loaded directly startup moment of ball mill, as shown in b line in Fig. 5, initiatively the speed of the rotating excitation field cutting electric machine stationary rotor of motor stator is large, produces very large immediate current.Because ball mill is fully loaded, before starting, it remains static simultaneously, and initiatively motor need overcome the static inertia of ball mill barrel, declines slowly so active motor load reduces electric current 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 to do uniformly accelerated motion with a constant moment, and now current of electric also remains unchanged.Accelerate 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 large decrease speed of starting current is slow but also the duration is longer for this process, very large to whole electrical network impact, has affected electrical machinery life, forms serious harm.
The startup moment of the fully loaded mechanical soft start of ball mill, as c line in Fig. 5, because the rotor of active motor is rotating, initiatively the speed of the rotating excitation field cutting rotor of motor stator reduces, and reduces according to the known startup immediate current of electromagnetic induction principle.Ball mill barrel is in rotation status simultaneously, and initiatively motor is without the static inertia that overcomes ball mill, and required output torque reduces.Very fast under electric current.Cylindrical shell is done the uniformly accelerated motion of a period of time with rear motor, now current constant is until cylindrical shell reaches rated speed again, and electric current again drops to a definite value and no longer changes.The whole start-up course time is shorter, starts immediate current and significantly reduces, and electric current decrease speed is very fast, and the motor life-span itself has been improved to the impact to electrical network greatly without impact simultaneously.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction.Any those of ordinary skill in the art, do not departing from technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore do not depart from the content of technical solution of the present invention every, the equivalence of doing according to the present invention's shape, structure and principle changes, and all should be covered by protection scope of the present invention.
Claims (1)
1. can realize the ball mill of mechanical type soft starting for one kind, include stand-by motor, pinion deceleration machine, brake, bull gear reducer, fluid coupling and initiatively motor, one end of bull gear reducer power shaft is connected by fluid coupling with active motor, 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, brake is located on 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, its soft-start method is: first after the deceleration of stand-by motor by pinion deceleration machine and bull gear reducer, drive barrel body rotation, raw material mixed and disorderly in cylindrical shell and stone ball are evenly distributed in cylindrical shell, stand-by motor also drives the initiatively rotor of motor to rotate by pinion deceleration machine simultaneously, stand-by motor operation is after ten minutes, start initiatively motor simultaneously, when the Spin-up of the speed change of active motor by fluid coupling and bull gear reducer to cylindrical shell, when cylindrical shell speed exceedes the speed that stand-by motor drives, freewheel clutch generation effect, stand-by motor idle running, close down stand-by motor, initiatively motor accelerates until do uniform rotation after rated speed cylindrical shell.
Priority Applications (1)
| 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 |
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102527478A CN102527478A (en) | 2012-07-04 |
| CN102527478B true CN102527478B (en) | 2014-06-04 |
Family
ID=46336218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210018996.XA Active CN102527478B (en) | 2012-01-20 | 2012-01-20 | Ball grinder capable of achieving mechanical type soft starting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102527478B (en) |
Families Citing this family (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 |
| 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 |
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 | Transmission device of tube mill |
| 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 | Transmission device of tube mill |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102527478A (en) | 2012-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102527478B (en) | Ball grinder capable of achieving mechanical type soft starting | |
| CN202410767U (en) | Ball grinding mill capable of achieving mechanical soft start | |
| KR101619000B1 (en) | Drive arrangement for a vertical roller mill | |
| CN103036485A (en) | Permanent magnet direct current motor start impact current suppression device and suppression method thereof | |
| CN101825146B (en) | Self-adaptive magnetorheological clutch | |
| CN204928518U (en) | Asynchronous starting synchronous operation permanent magnetism coupling soft starter | |
| CN104767331B (en) | A kind of movable stator formula is from speed governing magneto | |
| CN103670718A (en) | Electric starting control method and device for gas turbine | |
| CN205610506U (en) | Motor safety starting protection system | |
| CN114039453B (en) | Gas turbine generator set started by alternating current exciter of brushless generator and starting method thereof | |
| CN203092751U (en) | Auxiliary starting device of precast concrete pile centrifugal machine unit | |
| CN201096175Y (en) | Electric motor drive combination device easy for start-up | |
| CN204089649U (en) | The electric control loop of dewaterer motor | |
| CN102969946A (en) | Starting method of high load motor | |
| CN204175495U (en) | Safety type starter motor | |
| CN201742283U (en) | Self-adaptive electromagnetic clutch | |
| CN205610439U (en) | Single phase alternating current asynchronous resistance split -phase motor | |
| CN104895723B (en) | Bielectron switch starting machine and its control method | |
| CN204553043U (en) | Bielectron switch starting machine | |
| CN205101539U (en) | Start device out of supply for motor experiments | |
| CN205141950U (en) | Primary and secondary formula double speed toper rotor three -phase asynchronous motor | |
| CN205248978U (en) | Combination motor | |
| CN218733814U (en) | High-efficiency transmission control system combining soft starter and permanent magnet coupler | |
| CN114289168B (en) | Method for starting depolymerizer system | |
| CN101719750A (en) | Method for starting low revolutional slip asynchronous motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |