CN202316045U - Center drive direct-drive system of low-speed large-torque permanent magnet motor of ball grinding mill - Google Patents
Center drive direct-drive system of low-speed large-torque permanent magnet motor of ball grinding mill Download PDFInfo
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- CN202316045U CN202316045U CN2011204692747U CN201120469274U CN202316045U CN 202316045 U CN202316045 U CN 202316045U CN 2011204692747 U CN2011204692747 U CN 2011204692747U CN 201120469274 U CN201120469274 U CN 201120469274U CN 202316045 U CN202316045 U CN 202316045U
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Abstract
The utility model discloses a center drive direct-drive system of a low-speed large-torque permanent magnet motor of a ball grinding mill. The center drive direct-drive system comprises a barrel provided with a hollow discharging shaft and a hollow feeding shaft at two ends, wherein the hollow rotating shaft at two ends of the barrel are used as a motor rotating, a rolling bearing is fixedly arranged on a bearing base, the motor rotating shaft and a barrel body share one set of rolling bearing; motors are arranged on one ends of the hollow shafts, permanent magnets directly fixedly arranged on the surfaces of the hollow shafts by adopting tangential structures form a motor rotor, a motor stator is directly sleeved on the motor rotor, a gap is arranged between the motor stator and the motor rotor, a shell is arranged outside the motor stator, the motor stator and the shell are fixed by using a motor base below the motor stator and the shell, a motor control system is arranged outside the shell, and the motor control system is supplied with power by adopting a low-voltage power supply of below 1000V. The center drive direct-drive system has the advantages of remarkably improving the transmission efficiency, realizing energy conservation, and reducing the cost.
Description
Technical field
The utility model relates to a kind of ball mill center transmission system, especially designs a kind of ball mill center transmission Direct Driving System.
Background technology
Ball mill is that material is broken after the essence, carries out the key equipment of grinding again, is widely used in the industry that ore dressing, building materials, chemical industry etc. need carry out grinding processing to raw material, is one of widely used Super-fine grinder machinery in the commercial production.Ball mill comprises cylindrical shell, input and output material hollow shaft and the bistrique of level, and cylindrical shell is microscler cylinder, in the tube abrasive body is housed; Cylindrical shell is the steel plate manufacturing; Inwall is fixed by steel abrasion-proof backing block and cylindrical shell, and abrasive body is generally the steel ball, and packs in the tube by different-diameter and certain proportion.The ball mill that uses at present is the edge transmission of adopting open gear pair mostly; Comprise motor, parallel reductor, pinion, bull gear, ball mill barrel etc.; Through motor-driven, driving force is transferred on the pinion of parallel speed reducer output shaft, drive again and be fixed in the bull gear on the balling drum edge; Ball mill barrel is rotated, and the central shaft at cylindrical shell two ends is to support through sliding bearing.
The drive mechanism volume of this asynchronous machine-reductor-gear pair is big, the installation floor space is big, noise is big when moving; Mechanical efficiency is generally about 0.6; Have problems such as power consumption is high, capacity usage ratio is low, energy strategies obvious and the existing energy-saving and emission-reduction of China are not inconsistent.Simultaneously, the exposed gear of edge transmission is in the gear cover that is difficult to strict seal, is difficult to keep good lubricating; The gear pair that exposes needs constantly oily, is prone to pollute, and it is quite violent that dust is invaded the back wearing and tearing; Its life-span is shorter; And the part of edge transmission disperses, and fuel feeding point and checkpoint are bigger, operation, inspection, maintenance difficult.Particularly starting and when running because of overcoming the relatively large frictional force of sliding bearing, must increase the power of motor loss.
In order to solve the deficiency that the transmission of above-mentioned edge exists; In recent years there is multinomial patent all to propose to replace the edge transmission, adopts main motor to drive cylindrical shell and rotate through fluid coupling, planetary reducer, center power transmission shaft like one Chinese patent application 91212025 " center transmission ball mill " with the center transmission; Patent 96224895 " center transmission conical ball mill " motor drives cylindrical shell vertically through fluid coupling, decelerator, perimeter rows glassware; Patent 98204546 " center backspin rolls formula ball mill " cylindrical shell two ends are the hollow end axle, are connected with the input and output material bistrique of hollow structure respectively, and the input and output material bistrique is supported by carrying roller, and the discharging bistrique is connected with the output shaft of reductor through discharger; Or the like.Though these designs have all been done in various degree the edge transmission system of ball mill and have been improved accordingly; But it is all perfect inadequately; The ball mill center transmission system that is embodied in proposition still needs mechanical speed governors equipment such as fluid coupling, reductor; All can thoroughly not remove reductor, realize direct driving truly.The fluid coupling cost that needs in the transmission system of the said ball mill of above-mentioned patent center is high; Can make a noise because of gears engaged during the reductor operation; Easy to wear, and the regular apply oil of reductor needs, maintenance workload is big; The most important thing is to make the efficient of whole drive system to reduce significantly, obvious and energy-saving and emission-reduction are not inconsistent with the reduction energy consumption of unit product; And link to each other through shaft coupling between the distinct device parts, be difficult to guarantee the concentricity of connection, be easy to generate mechanical wear, so that increase the load of drive unit.
The low speed high torque transmission system is meant that generally rotating speed is lower than 500 r/min, and specified output torque is greater than the transmission system of 500N.m.Such transmission system is common in many industrial transmission fields, and the ball mill transmission system is exactly typical low speed high torque transmission system.Require in the system of low speed transmission the main at present drive pattern that adopts traditional asynchronous machine-reductor at these.The shortcoming of this drive pattern is mainly reflected in: the first, because mechanical reasons such as reducer gear have reduced the whole transmission efficiency of system; The second, because the existence of reductor makes the overall volume of transmission system bigger, the through-put power density of system is lower in other words; The 3rd, be that the transmission system speed governing ability of main speed control device is limited, fixing with reductor and gear, be difficult to come drum speed is carried out control corresponding and adjustment, adaptation industrial and mineral ability according to the difference that ball mill processed raw material.Obviously, oneself can't adapt to the modern requirement that drives the traditional driving pattern, and existing many theory and technology problems has to be solved.
Aspect the power supply of motor and transmission system thereof, control; In order to reduce to control electric current; Main drive motor such as this type of big machinery equipment of ball mill adopts the high-voltage asynchronous motor-driven more than the 6kV usually; And its main drive motor is all chosen by system's peak load, and the average load rate less than 50% of most of system during actual motion, this moment, the efficient and the power factor of induction conductivity generally were lower than 0.6.The conventional method that solves this contradiction is to adopt frequency control, but the high voltage converter Performance And Reliability is all far away from low voltage frequency converter, price especially, and the high voltage converter of equal-wattage almost is 3 ~ 4 times of low pressure.Therefore, this electric pressure has promptly increased manufacturing cost, has also increased and has controlled cost, whole drive system exists that cost is high, efficient is low, poor reliability, to drawbacks such as harmonic pollution in electric power net.
The deficiency that exists for the ball mill transmission system that overcomes traditional asynchronous machine-reductor-gear pair; The utility model provides and change traditional ball mill transmission system into the low speed large torque moment permanent-magnet motor direct-drive, adopt the following low-tension supply of 1000V magneto to be supplied power simultaneously through frequency converter.Adopt low speed high torque directly to drive, not only have characteristics such as volume is little, the installation floor space is little, the operation noise is little, frequency of maintenance is low, and the transmission efficiency of whole system can improve obviously; Adopt motor and the shared bearing mode of ball mill rotating cylinder, guaranteed the concentricity of mechanical connection, reduced mechanical wear; Adopt the following low-tension supply power supply of 1000V, not only can reduce the price of transmission system equipment needed thereby significantly, also can reduce the risk of the apparatus insulated destruction of bringing by high voltage source; Adopt frequency converter that motor is supplied power, need the occasion of speed governing, can realize control and adjustment according to the difference that ball mill processed raw material, the demand of adaptation industrial and mineral that can be good drum speed at motor; When the motor rated frequency is the power supply power frequency; Can realize the starting of variable-frequency motor through frequency converter; After treating that motor starting process is accomplished; Motor switched to low-tension supply directly supply power, can continue next variable-frequency motor of starting this moment with frequency converter, and this way has realized with many variable-frequency motors of a frequency converter sequential firing.To sum up; The following low-tension supply of employing 1000V that is proposed has the advantages that through the ball mill low speed large torque moment permanent-magnet synchronous motor Direct Driving System of inverter supply cost is low, transmission efficiency is high, can well adapt to the demand of different operating modes and the energy strategy of national energy-saving and emission-reduction.
Summary of the invention
The technical problem that the utility model will solve is: for overcome deficiency such as the volume that ball mill tradition transmission system asynchronous machine-reductor-the gear pair structure exists is big, floor space big, be prone to pollute, the life-span is short, transmission efficiency is low and because the employing high voltage source is supplied power caused equipment manufacturing cost height, poor reliability, to drawbacks such as harmonic pollution in electric power net; The present invention provides a kind of ball mill; Adopt the low speed large torque moment permanent-magnet motor direct-drive; And utilize the following low-tension supply of 1000V motor to be supplied power through frequency converter; This invention has significantly improved the transmission efficiency of whole drive system, has realized energy-conservationly, has reduced cost.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
The straight drive system of a kind of ball mill low speed large torque moment permanent-magnet motor center transmission comprises that two ends are equipped with the cylindrical shell of quill shaft as feed shaft and discharging shaft, is machine shaft with cylindrical shell two ends quill shaft; On the quill shaft at cylindrical shell two ends rolling bearing is installed; Rolling bearing is fixedly mounted on the bearing base, the shared cover rolling bearing of machine shaft and cylindrical shell, and it is characterized in that: an end of cylindrical shell two ends quill shaft is equipped with motor; Motor is included in the surface of quill shaft and adopts cutting orientation structure fixed installation permanent magnet to form rotor; Motor stator directly is enclosed within on the rotor, leaves air gap between motor stator and the rotor, and motor stator is equipped with casing outward; The electric machine stand of motor stator and casing utilization below is fixed, and casing is equipped with electric machine control system outward.
Said motor is the low speed large torque moment permanent-magnet motor.
Described electric machine control system connects the following low-tension supply of 1000V motor is supplied power.
Described electric machine control system is useful on the frequency converter of actuating motor at the following low-tension supply side joint of 1000V.
The utility model beneficial effect: the said ball mill of the utility model has adopted low speed large torque moment permanent-magnet motor center transmission Direct Driving System; The edge transmission system of the open gear pair that is adopted with traditional ball mill is compared; Completely abolished and had parts such as bull gear, pinion, reductor in the edge drive mechanism; Make that equipment volume reduces greatly, structure is compact more, has that floor space is less, in light weight, little, the advantages such as transmission efficiency is high, good energy-conserving effect of operation noise.
Adopt the ball mill transmission system of low speed large torque moment permanent-magnet motor direct-drive, with the complicacy of traditional asynchronous machine-reductor-gear pair and huge drive unit is directly alternative with a low speed large torque moment permanent-magnet motor, effectively avoided exposed gear to be in the gear cover that is difficult to strict seal; Be difficult to keep good lubricating; The gear pair that exposes needs constantly oily, is prone to pollute, and it is quite violent that dust is invaded the back wearing and tearing; Its life-span is shorter; And the part of edge transmission disperses, and fuel feeding point and checkpoint are bigger, shortcomings such as operation, inspection, maintenance difficult; That utilizes that the Permanent Magnet and Electric synchronous motor itself has all can keep the higher efficient and the characteristics of power factor in 25%～120% nominal load scope; Effectively having improved ball mill employing asynchronous machine is the low shortcoming of efficient and power factor at the light running state, makes light running more energy-conservation.
In addition, adopt the mode of the shared cover bearing of machine shaft and ball mill barrel, guaranteed the concentricity of mechanical connection, reduced wearing and tearing; Adopt the following low-tension supply of 1000V to supply power through frequency converter, can overcome on the one hand because adopt that the caused equipment manufacturing cost of high voltage source is high, efficient is low, poor reliability, to drawbacks such as harmonic pollution in electric power net; Can overcome on the other hand with reductor and gear is the transmission system speed governing deficiency limited in one's ability, fixing of main speed control device; Can according to the difference that ball mill processed raw material come to drum speed carry out control corresponding and adjustment, to adapt to the industrial and mineral ability strong; And when the motor rated frequency is the power supply power frequency; Can realize the starting of variable-frequency motor through frequency converter, treat that motor starting process is accomplished after, motor switched to low-tension supply directly supplies power; Can continue next variable-frequency motor of starting this moment with frequency converter, and this way has realized with many variable-frequency motors of a frequency converter sequential firing.
In sum; The said ball mill of the utility model adopts the low speed large torque moment permanent-magnet motor direct-drive transmission system of the following low-tension supply of 1000V through inverter supply to have that volume is little, erection space is little, little, the characteristics such as equipment manufacturing cost is low, reliability height of operation noise; Can be widely used in the ball mill transmission system; Effectively raise the physical life and the transmission efficiency of ball mill, reduced energy loss, realized energy-conservation.
Description of drawings:
Fig. 1 is the utility model ball mill low speed large torque moment permanent-magnet electric-machine directly-driven master of system TV structure sketch map;
Fig. 2 is that the A-A of Fig. 1 is to cutaway view;
Fig. 3 is electric machine control system power supply sketch map;
Description of reference numerals:
1. feed shaft, 2. rolling bearing, 3. bearing base, 4. cylindrical shell, 5. motor base, 6. low speed large torque moment permanent-magnet motor, 7. motor stator, 8. rotor, 9. discharging shaft, 10. machine shaft, 11. electric machine control systems, 12. frequency converters.
The specific embodiment:
Below in conjunction with accompanying drawing the utility model is elaborated.
Fig. 1 is the utility model ball mill low speed large torque moment permanent-magnet electric-machine directly-driven master of system TV structure sketch map; As shown in the figure; The straight drive system of ball mill low speed large torque moment permanent-magnet motor center transmission mainly comprises bearing base 3, motor base 5, cylindrical shell 4, rolling bearing 2, electric machine control system 11 and is used to drive the motor that cylindrical shell 4 rotates; Cylindrical shell 4 is installed on the machine shaft 10; Cylindrical shell 4 two ends are equipped with rolling bearing 2, machine shaft 10 and cylindrical shell 4 shared cover rolling bearings 2, and rolling bearing 2 is fixedly mounted on the bearing base 3.Cylindrical shell 4 two ends are equipped with quill shaft as feed shaft 1 and discharging shaft 9, on the quill shaft of feed shaft 1 or discharging shaft 9 motor are installed, and use the center kind of drive, directly utilize quill shaft as machine shaft 10.Motor is selected low speed large torque moment permanent-magnet motor 6 for use; Adopt cutting orientation structure fixed installation permanent magnet to form rotor 8 on the surface of quill shaft, motor stator 7 directly is enclosed within on the rotor 8, leaves air gap between motor stator 7 and the rotor 8; Outside the motor stator 7 casing is installed, as shown in Figure 2.Motor stator 7 is fixed with the electric machine stand 5 of casing utilization below; Casing is equipped with electric machine control system 11 outward; Electric machine control system power supply sketch map is as shown in Figure 3, and electric machine control system 11 has a frequency converter 12 at the following low-tension supply side joint of 1000V, realizes the starting of variable-frequency motor through frequency converter 12; After motor starting process is accomplished; Motor switched to low-tension supply directly supply power, can use this moment frequency converter 12 to continue next variable-frequency motor of starting, this way has realized with many variable-frequency motors of a frequency converter sequential firing.
More than show and described basic principle of the present invention and principal character, and the advantage of the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from spirit and scope of the invention, the utility model also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.
Claims (4)
1. straight drive system of ball mill low speed large torque moment permanent-magnet motor center transmission; Comprise that two ends are equipped with the cylindrical shell (4) of quill shaft as feed shaft (1) and discharging shaft (9); With cylindrical shell (4) two ends quill shaft is machine shaft (10), on the quill shaft at cylindrical shell (4) two ends rolling bearing (2) is installed, and rolling bearing (2) is fixedly mounted on the bearing base (3); Machine shaft (10) and the shared cover rolling bearing (2) of cylindrical shell (4); It is characterized in that: an end of cylindrical shell (4) two ends quill shaft is equipped with motor, and motor is included in the surface of quill shaft and adopts cutting orientation structure fixed installation permanent magnet to form rotor (8), and motor stator (7) directly is enclosed within on the rotor (8); Leave air gap between motor stator (7) and the rotor (8); The outer casing that is equipped with of motor stator (7), motor stator (7) and casing utilize the electric machine stand (5) of below to fix, and casing is equipped with electric machine control system (11) outward.
2. according to the straight drive system of the said a kind of ball mill low speed large torque moment permanent-magnet motor center transmission of claim 1, it is characterized in that: said motor is low speed large torque moment permanent-magnet motor (6).
3. according to the straight drive system of the said a kind of ball mill low speed large torque moment permanent-magnet motor center transmission of claim 1, it is characterized in that: described electric machine control system (11) connects the following low-tension supply of 1000V motor is supplied power.
4. according to the straight drive system of the said a kind of ball mill low speed large torque moment permanent-magnet motor center transmission of claim 3, it is characterized in that: described electric machine control system (11) is useful on the frequency converter (12) of actuating motor at the following low-tension supply side joint of 1000V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204692747U CN202316045U (en) | 2011-11-23 | 2011-11-23 | Center drive direct-drive system of low-speed large-torque permanent magnet motor of ball grinding mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204692747U CN202316045U (en) | 2011-11-23 | 2011-11-23 | Center drive direct-drive system of low-speed large-torque permanent magnet motor of ball grinding mill |
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| Publication Number | Publication Date |
|---|---|
| CN202316045U true CN202316045U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204692747U Expired - Fee Related CN202316045U (en) | 2011-11-23 | 2011-11-23 | Center drive direct-drive system of low-speed large-torque permanent magnet motor of ball grinding mill |
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| Country | Link |
|---|---|
| CN (1) | CN202316045U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513191A (en) * | 2011-11-23 | 2012-06-27 | 沈阳工业大学 | Center drive direct-driven system of low-speed and large-torque permanent magnet motor of ball mill |
| CN103962202A (en) * | 2014-05-22 | 2014-08-06 | 江苏秋林重工股份有限公司 | Center-driving water coal slurry ball grinding mill |
-
2011
- 2011-11-23 CN CN2011204692747U patent/CN202316045U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513191A (en) * | 2011-11-23 | 2012-06-27 | 沈阳工业大学 | Center drive direct-driven system of low-speed and large-torque permanent magnet motor of ball mill |
| CN102513191B (en) * | 2011-11-23 | 2015-01-28 | 沈阳工业大学 | Center drive direct-driven system of low-speed and large-torque permanent magnet motor of ball mill |
| CN103962202A (en) * | 2014-05-22 | 2014-08-06 | 江苏秋林重工股份有限公司 | Center-driving water coal slurry ball grinding mill |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20151123 |