Belt conveyor for conveying bulk density less than 1.67 / t / cubic meter , easy to dig a powder, granular, small block of low- abrasive materials and bags of materials such as coal , gravel , sand , cement, fertilizer , food and so on. Sent material temperature is less than 60 ℃. Its captain and assembly forms can be determined according to user requirements , transmission can be electric drum can also be used with the drive rack drives.
Belt conveyor used can be divided into : ordinary canvas core conveyor belt , high strength steel cord belt transmission machine, run under full proof belt conveyor , flame-type Bucket Elevator , two-speed dual op- belt conveyor , reversible mobile belt conveyor , belt conveyor and so cold .
Belt conveyor is widely used in mining, metallurgy, coal and other departments to transport loose materials or items, according to transport process requirements, can be a single conveyor can also be composed of multiple components or other transportation equipment horizontal or inclined transportation system to meet the different types of operating line layout needs .
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2013年9月29日星期日
2013年9月28日星期六
Some affect the efficiency of the screw conveyor conveying the main factors
Several impact screw conveyor transport efficiency main factors:
1 material viscosity , easy caking. Viscous material , the material is easy to stick to the screw conveyor blades and the inner wall , making the material handling process resistance increases directly affect production efficiency.
2 spiral diameter . Screw diameter also affects the size of the transport efficiency . Under the same conditions , diameter larger than the diameter conveyors efficient small throughput and transmission efficiency is high .
3 inclination of the screw conveyor and transmission distance.
4 . Material size , temperature, moisture , abrasive and corrosive . Specific parameters can refer to: Screw technical parameters and throughput formula.
5 screw conveyor speed . Related to the conveying motor power size. Screw Conveyor operating speed on the characteristics of the material are closely related , high- speed conveyor assembly demanding the production of , and better balance . The following table has four kinds of speed choice, in fact, more conservative, especially in large, medium size , speed is low , resulting in greater waste. Recommended in the selection table to take a higher speed, better transportation efficiency .
Screw conveyor is a more extensive use of transportation equipment , usually used for small pieces of powder or granular materials transportation . For different materials , the choice of model is not the same . General requirements for the food industry are mostly stainless steel screw conveyor , the more stringent requirements of the material for other industries according to need. For some materials with twining , more choice of shaftless screw conveyor , this type of conveyor can effectively reduce the material wound on the spindle case , greater throughput .
1 material viscosity , easy caking. Viscous material , the material is easy to stick to the screw conveyor blades and the inner wall , making the material handling process resistance increases directly affect production efficiency.
2 spiral diameter . Screw diameter also affects the size of the transport efficiency . Under the same conditions , diameter larger than the diameter conveyors efficient small throughput and transmission efficiency is high .
3 inclination of the screw conveyor and transmission distance.
4 . Material size , temperature, moisture , abrasive and corrosive . Specific parameters can refer to: Screw technical parameters and throughput formula.
5 screw conveyor speed . Related to the conveying motor power size. Screw Conveyor operating speed on the characteristics of the material are closely related , high- speed conveyor assembly demanding the production of , and better balance . The following table has four kinds of speed choice, in fact, more conservative, especially in large, medium size , speed is low , resulting in greater waste. Recommended in the selection table to take a higher speed, better transportation efficiency .
Screw conveyor is a more extensive use of transportation equipment , usually used for small pieces of powder or granular materials transportation . For different materials , the choice of model is not the same . General requirements for the food industry are mostly stainless steel screw conveyor , the more stringent requirements of the material for other industries according to need. For some materials with twining , more choice of shaftless screw conveyor , this type of conveyor can effectively reduce the material wound on the spindle case , greater throughput .
Bucket elevator tensioning device redesign
Bucket Elevator tensioning device redesign :
Since bucket elevator has a small footprint , full sealed transmission, reduce environmental pollution, is commonly used in conveying bulk material handling equipment .
Bucket elevators work in order to stabilize the normal operation of the traction needed for tensioning member tensioning force is called the tension generated ; keep running tension is called the minimum initial tension , the tension is too early to accelerate parts wear in , initial tension is too small , traction wheel slip or towing parts and pieces of deflection , is not working properly . Tractor parts with tape, ring chain , plate chain several structures , performance is not the same, so the selection of the tensioning method is also different , the current methods commonly used tensioning screw tensioning tensioning lever hammer , hammer tensioning , composite tension and so on.
Screw mounted on the lower part of the chassis , nut U-shaped groove in the support plate , when the rotary screw , they can move the support plate , the lower bearing is fixed on the support plate, thereby enabling lower tension roller to pull pieces . This method is suitable for tensioning the tape for traction member using bucket elevators , the tape a certain degree of flexibility , when given elongation , the adjustable tensioning screw , in order to ensure stability of the work tape .
The hammer lever tensioning force acts on the support plate , fixed to a lower bearing support plate , so that the lower part of the pulling element driven sprocket taut. This is an automatic tensioning device , hammer follower lever has a certain resistance, traction member to stay in the skin with a certain tension, so that the stable operation of the drive in the chain hoist is usually applied to avoid slipping off the chain and the application effect.
Tensioning hammer , hammer gravity via the bracket directly to the lower bearing housing , the pulling of the lower driven sprocket member taut, and the hammer lever tensioning methods, to achieve the same tension , more weight . So commonly used in weight pulling pieces larger plate chain hoist in position space is small, automatic tensioning method .
Composite tension , combined with the spring hammer , pressure in the lower bearing seat, so that the lower part of the traction drive wheel parts taut, composite tension in between the hammer and the lower bearing housing plus a set of spring , so too rear axle when wearing a certain buffer , suitable for use in traction hoist pieces larger self , the use of attention on both sides of equal weight hammer block , avoid heavy.
Since bucket elevator has a small footprint , full sealed transmission, reduce environmental pollution, is commonly used in conveying bulk material handling equipment .
Bucket elevators work in order to stabilize the normal operation of the traction needed for tensioning member tensioning force is called the tension generated ; keep running tension is called the minimum initial tension , the tension is too early to accelerate parts wear in , initial tension is too small , traction wheel slip or towing parts and pieces of deflection , is not working properly . Tractor parts with tape, ring chain , plate chain several structures , performance is not the same, so the selection of the tensioning method is also different , the current methods commonly used tensioning screw tensioning tensioning lever hammer , hammer tensioning , composite tension and so on.
Screw mounted on the lower part of the chassis , nut U-shaped groove in the support plate , when the rotary screw , they can move the support plate , the lower bearing is fixed on the support plate, thereby enabling lower tension roller to pull pieces . This method is suitable for tensioning the tape for traction member using bucket elevators , the tape a certain degree of flexibility , when given elongation , the adjustable tensioning screw , in order to ensure stability of the work tape .
The hammer lever tensioning force acts on the support plate , fixed to a lower bearing support plate , so that the lower part of the pulling element driven sprocket taut. This is an automatic tensioning device , hammer follower lever has a certain resistance, traction member to stay in the skin with a certain tension, so that the stable operation of the drive in the chain hoist is usually applied to avoid slipping off the chain and the application effect.
Tensioning hammer , hammer gravity via the bracket directly to the lower bearing housing , the pulling of the lower driven sprocket member taut, and the hammer lever tensioning methods, to achieve the same tension , more weight . So commonly used in weight pulling pieces larger plate chain hoist in position space is small, automatic tensioning method .
Composite tension , combined with the spring hammer , pressure in the lower bearing seat, so that the lower part of the traction drive wheel parts taut, composite tension in between the hammer and the lower bearing housing plus a set of spring , so too rear axle when wearing a certain buffer , suitable for use in traction hoist pieces larger self , the use of attention on both sides of equal weight hammer block , avoid heavy.
2013年9月26日星期四
Heavy hammer crusher working principle and scope
Hammer Mill hammer , also known as broken, is to simulate the movement of animals to complete two jaw crusher crushing materials . Widely used in mining industry in various ores and medium-grained bulk materials broken . Hammer Crusher can crush materials of the highest compressive strength 320Mpa.
Hammer crusher works:
This series of hammer crusher works for the song moving extrusion type, and the hammer broke works: moving jaw hanging on the mandrel can be used as swing around the eccentric shaft rotates, the rod up and down reciprocating motion. Such crusher crank double linkage, although the moving jaw broken by a great reaction force , and its eccentric shaft and connecting rod has a large discontinuity . In addition, this work hammer crusher , jaw on the trajectory of each point are based on an arc centered on the mandrel , the crushing ratio of 3-6 i usually because of the trajectory is simple, it is referred to simply swing the hammer crusher. Simple pendulum crusher compact and simple structure , the eccentric shaft transmission parts smaller force ; vertical displacement of the movable jaw because smaller processing materials have less excessive fragmentation of the phenomenon, so this hammer crusher mobile jaw jaw plate wear small.
Hammer crusher purpose and scope :
1 , the series crusher is mainly used in metallurgy, mining, chemical, cement, construction, refractories and ceramics and other industrial sectors for medium pieces and crushing of hard ores and rocks with .
2 , the series crusher best suited to crushing compression strength not higher than 300MPa ( MPa ) of various hard and soft ore , the largest block of material to be broken shall be not greater than the required technical parameters .
Hammer crusher works:
This series of hammer crusher works for the song moving extrusion type, and the hammer broke works: moving jaw hanging on the mandrel can be used as swing around the eccentric shaft rotates, the rod up and down reciprocating motion. Such crusher crank double linkage, although the moving jaw broken by a great reaction force , and its eccentric shaft and connecting rod has a large discontinuity . In addition, this work hammer crusher , jaw on the trajectory of each point are based on an arc centered on the mandrel , the crushing ratio of 3-6 i usually because of the trajectory is simple, it is referred to simply swing the hammer crusher. Simple pendulum crusher compact and simple structure , the eccentric shaft transmission parts smaller force ; vertical displacement of the movable jaw because smaller processing materials have less excessive fragmentation of the phenomenon, so this hammer crusher mobile jaw jaw plate wear small.
Hammer crusher purpose and scope :
1 , the series crusher is mainly used in metallurgy, mining, chemical, cement, construction, refractories and ceramics and other industrial sectors for medium pieces and crushing of hard ores and rocks with .
2 , the series crusher best suited to crushing compression strength not higher than 300MPa ( MPa ) of various hard and soft ore , the largest block of material to be broken shall be not greater than the required technical parameters .
Hammer crusher hammer and wear resistance of materials related
Hammer Mill is the first invention and application of crushing equipment, because it works is simple and practical , is to use the material on the line broken hammer banging on the line operation principle , not difficult to see from here the whole hammer hammer crusher equipment important is self-evident , it directly affects the machine 's efficiency and crushing hardness, so for hammer crusher hammer is a key component is the largest , at present, is made of high manganese steel hammers Because there is not enough high manganese steel wear resistance, abrasion resistance is poor, life is short, requiring frequent replacement. These factors affect the life of the hammer .
Hammer crusher is a major gap within the rotor body and back plate , grate , and the gap between the hammer. If the product material exists, but can not expect from the plot of the grate on the depressed hammer , the hammer will be a serious friction and wear. Therefore, the use of the process , part of the gap to be adjusted frequently , it is in the proper range .
A hammerhead structure design and the quality of the heat-treated product hammerhead design and geometry , their mechanical properties and microstructure within the great impact . Especially large thickness dimension of the hammer , the impact is more prominent. Since the defects , most of the weight of the initial period of breakage. Therefore, the production of the hammer must develop a reasonable casting and heat treatment process.
Hammer crusher is a major gap within the rotor body and back plate , grate , and the gap between the hammer. If the product material exists, but can not expect from the plot of the grate on the depressed hammer , the hammer will be a serious friction and wear. Therefore, the use of the process , part of the gap to be adjusted frequently , it is in the proper range .
A hammerhead structure design and the quality of the heat-treated product hammerhead design and geometry , their mechanical properties and microstructure within the great impact . Especially large thickness dimension of the hammer , the impact is more prominent. Since the defects , most of the weight of the initial period of breakage. Therefore, the production of the hammer must develop a reasonable casting and heat treatment process.
2013年9月17日星期二
Troubleshooting belt conveyor
Belt deviation
To address such failures is important to note the dimensional accuracy of installation and daily maintenance. There are several reasons for deviation, to be based on the difference between handling different reasons.
1 Adjust the Belt Conveyor idlers bearing belt in the middle of the entire belt conveyor idlers deviation, adjust the position to adjust the deviation; idlers in the manufacture of both sides of the mounting holes are worked into holes for be adjusted. Specific adjustment method, the specific method is biased which side of the belt, idlers which side of the belt toward the forward direction forward, backward, or the other side. Figure 1 shows the direction of the belt upward deviation is lower roller group should be located at the left, the upper roller group moved to the right place.
2 Install aligning roller group aligning roller group has many types such as an intermediate shaft type, four-link, vertical roller type, etc. The principle is the use of block or roller rotates in the direction in the horizontal plane lateral thrust block or generate the Automatic belt adjustment belt deviation reaches to the heart of the purpose. Average total length of the belt conveyor or belt conveyor shorter run time using this method bidirectional more reasonable, because the shorter belt conveyors easier deviation and not easy to adjust. And long belt conveyor is best not to use this method, because self-aligning roller group life belt use would have some impact.
3 Adjust the drive pulley and the driven pulley and bend pulley position adjustment bend pulley belt deviation adjustment is an important part. Because a belt conveyor with at least two to five rollers, all the rollers must be perpendicular to the installation location of the longitudinal direction of the belt conveyor centerline, if the skew is too large deviation inevitable. Adjustment Method and its group of similar idlers. For the head drum as the drum belt deviation to the right, the right of the bearing should be moved forward, the belt deviation to the left of the drum, the left bearing housing should be moved forward, also the corresponding After moving the left or right side bearing housings after the shift. Rear roller adjustment method and the head drum opposite. Adjustment method. After repeated adjustments until the belt transferred to an ideal location. Adjust the drive or bend pulley in the best pre-install its exact location.
4 tension belt tension adjustment at the adjustment at the conveyor belt deviation adjustment a very important part. Hammer at the upper two tensioning idler pulley in addition to other than perpendicular to the longitudinal direction of the belt should be perpendicular to the vertical line of gravity, which is to ensure its axis horizontal centerline. Tensioning screw or hydraulic cylinders with tension, the tension of the two roller bearing shall simultaneously pan, to ensure the longitudinal direction of the drum axis and perpendicular to the belt. Specific method of adjusting the belt deviation adjustment of the drum at similar.
5 reprinted point blanking position on the belt deviation of reproduced material blanking at the point position on the belt deviation has a very big impact, especially in the two belt conveyor in the horizontal plane perpendicular to the projection of a greater impact. Usually reproduced points should be considered down two belt conveyor relative height. The relative height of the lower horizontal velocity component of the material the greater the impact on the lower side of the belt is greater, while the material is difficult to center. The cross section of the material on the belt deflection, resulting belt deviation. If the material is biased to the right, then the belt deviation to the left, and vice versa. In the design process should be possible to increase the relative height of two belt conveyor. In space-constrained mobile bulk material handling machinery down funnel, guide trough and other pieces of form and size should be seriously considered. General guidance for the width of the trough belt width should be about two-thirds more appropriate. In order to reduce or avoid the belt deviation increase blocking plate blocking materials, changing direction and position of the whereabouts of the material.
6-way running conveyor belt deviation adjustment bidirectional running belt conveyor belt deviation adjustment than the one-way conveyor belt deviation relative to the adjustment much more difficult, specific adjustments should be adjusted in a certain direction, and then adjust another direction. Adjust the belt to carefully observe the movement direction of the relationship with the deviation trend, individually adjusted. Emphasis should be placed on the drive pulley and bend pulley adjustments, followed by the adjustment of the roller and the material blanking point adjustment. Also note that the belt when the belt curing joint cross the longitudinal direction of the force evenly in the use of both sides of the chain traction force equal as possible.
To address such failures is important to note the dimensional accuracy of installation and daily maintenance. There are several reasons for deviation, to be based on the difference between handling different reasons.
1 Adjust the Belt Conveyor idlers bearing belt in the middle of the entire belt conveyor idlers deviation, adjust the position to adjust the deviation; idlers in the manufacture of both sides of the mounting holes are worked into holes for be adjusted. Specific adjustment method, the specific method is biased which side of the belt, idlers which side of the belt toward the forward direction forward, backward, or the other side. Figure 1 shows the direction of the belt upward deviation is lower roller group should be located at the left, the upper roller group moved to the right place.
2 Install aligning roller group aligning roller group has many types such as an intermediate shaft type, four-link, vertical roller type, etc. The principle is the use of block or roller rotates in the direction in the horizontal plane lateral thrust block or generate the Automatic belt adjustment belt deviation reaches to the heart of the purpose. Average total length of the belt conveyor or belt conveyor shorter run time using this method bidirectional more reasonable, because the shorter belt conveyors easier deviation and not easy to adjust. And long belt conveyor is best not to use this method, because self-aligning roller group life belt use would have some impact.
3 Adjust the drive pulley and the driven pulley and bend pulley position adjustment bend pulley belt deviation adjustment is an important part. Because a belt conveyor with at least two to five rollers, all the rollers must be perpendicular to the installation location of the longitudinal direction of the belt conveyor centerline, if the skew is too large deviation inevitable. Adjustment Method and its group of similar idlers. For the head drum as the drum belt deviation to the right, the right of the bearing should be moved forward, the belt deviation to the left of the drum, the left bearing housing should be moved forward, also the corresponding After moving the left or right side bearing housings after the shift. Rear roller adjustment method and the head drum opposite. Adjustment method. After repeated adjustments until the belt transferred to an ideal location. Adjust the drive or bend pulley in the best pre-install its exact location.
4 tension belt tension adjustment at the adjustment at the conveyor belt deviation adjustment a very important part. Hammer at the upper two tensioning idler pulley in addition to other than perpendicular to the longitudinal direction of the belt should be perpendicular to the vertical line of gravity, which is to ensure its axis horizontal centerline. Tensioning screw or hydraulic cylinders with tension, the tension of the two roller bearing shall simultaneously pan, to ensure the longitudinal direction of the drum axis and perpendicular to the belt. Specific method of adjusting the belt deviation adjustment of the drum at similar.
5 reprinted point blanking position on the belt deviation of reproduced material blanking at the point position on the belt deviation has a very big impact, especially in the two belt conveyor in the horizontal plane perpendicular to the projection of a greater impact. Usually reproduced points should be considered down two belt conveyor relative height. The relative height of the lower horizontal velocity component of the material the greater the impact on the lower side of the belt is greater, while the material is difficult to center. The cross section of the material on the belt deflection, resulting belt deviation. If the material is biased to the right, then the belt deviation to the left, and vice versa. In the design process should be possible to increase the relative height of two belt conveyor. In space-constrained mobile bulk material handling machinery down funnel, guide trough and other pieces of form and size should be seriously considered. General guidance for the width of the trough belt width should be about two-thirds more appropriate. In order to reduce or avoid the belt deviation increase blocking plate blocking materials, changing direction and position of the whereabouts of the material.
6-way running conveyor belt deviation adjustment bidirectional running belt conveyor belt deviation adjustment than the one-way conveyor belt deviation relative to the adjustment much more difficult, specific adjustments should be adjusted in a certain direction, and then adjust another direction. Adjust the belt to carefully observe the movement direction of the relationship with the deviation trend, individually adjusted. Emphasis should be placed on the drive pulley and bend pulley adjustments, followed by the adjustment of the roller and the material blanking point adjustment. Also note that the belt when the belt curing joint cross the longitudinal direction of the force evenly in the use of both sides of the chain traction force equal as possible.
Belt conveyor design elements
1, work environment, status and condition
Need to consider the daily running of the time, frequency, belt service life, feeding and discharge methods.
Work environment conditions: ambient temperature, outdoor or indoor, environmental requirements, mobile or fixed, telescopic requirements.
2, the transmission line and the Belt Conveyor belt problems
To consider in detail the size of transmission line, comprising: angle, the maximum length, lifting height; straight segment, the curve segment size; connection size.
Belt: Maximum sag requirements, simulated friction coefficient, friction coefficient, the safety factor.
3, the nature of the materials and throughput
Need to consider the specific nature of the material, including: bulk density, angle of repose, material particle size, largest block of the situation, the humidity of materials, material wear resistance, adhesion and friction coefficient. Throughput, even when the material flow can be directly achieved throughput, material flow can be considered when non-uniform material flow gives basic statistics.
Need to consider the daily running of the time, frequency, belt service life, feeding and discharge methods.
Work environment conditions: ambient temperature, outdoor or indoor, environmental requirements, mobile or fixed, telescopic requirements.
2, the transmission line and the Belt Conveyor belt problems
To consider in detail the size of transmission line, comprising: angle, the maximum length, lifting height; straight segment, the curve segment size; connection size.
Belt: Maximum sag requirements, simulated friction coefficient, friction coefficient, the safety factor.
3, the nature of the materials and throughput
Need to consider the specific nature of the material, including: bulk density, angle of repose, material particle size, largest block of the situation, the humidity of materials, material wear resistance, adhesion and friction coefficient. Throughput, even when the material flow can be directly achieved throughput, material flow can be considered when non-uniform material flow gives basic statistics.
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