CN111420865B - Heavy vibrating screening equipment - Google Patents
Heavy vibrating screening equipment Download PDFInfo
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- CN111420865B CN111420865B CN202010262058.9A CN202010262058A CN111420865B CN 111420865 B CN111420865 B CN 111420865B CN 202010262058 A CN202010262058 A CN 202010262058A CN 111420865 B CN111420865 B CN 111420865B
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- 230000008093 supporting effect Effects 0.000 claims description 5
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
- B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
Abstract
The invention relates to heavy vibration screening equipment, and belongs to the technical field of material conveying equipment. The excitation motor used in the invention is a motor with double output shafts, output shafts at two ends are respectively connected with driving shafts arranged on vibration exciters at two sides of a base crossbeam through a set of universal joint couplings, an included angle of not less than 15 degrees is formed between the driving shaft and an eccentric shaft, the driving shaft and the eccentric shaft are connected by adopting a pair of conical gears, two eccentric shafts are connected by a pair of cylindrical gears, eccentric blocks arranged on the two eccentric shafts have the same structure and size, and the generated excitation force is superposed in the direction vertical to the plane formed by the axes of the two eccentric shafts and is offset in the parallel direction. The exciting force produced by each vibration exciter is coincided with the center of the side plate, and main rotating parts such as gears, bearings and the like are sealed in the vibration exciters, so that the performance of the vibration exciters for lubricating by using thin oil is ensured. The invention improves the crack resistance of the side plate, prolongs the service life of the vibration exciter and has very obvious advantages.
Description
Technical Field
The invention relates to heavy vibration screening equipment for screening materials, and belongs to the technical field of material conveying equipment.
Background
In the industries of metallurgy, mine, coal, building materials and the like, a large amount of various vibration screening devices are used, the quantity and the scale of materials needing to be screened are larger and larger along with the development of modern industrial production, so that the requirements on large and heavy vibration screens are more and more, two problems in the production are increasingly prominent along with the popularization and the use of the devices, and the popularization and the application of the devices in the production are restricted. One problem is that along with the improvement of the requirement on the handling capacity of the vibration screening equipment, the weight and the size of the vibration equipment are correspondingly increased, so that the requirement on the exciting force of the vibration equipment is increased, along with the improvement of the requirement on the exciting force of the vibration exciter, the lubricating and sealing performance of the vibration exciter is also higher, because the most critical part of the vibration exciter is a bearing for supporting a high-speed rotating eccentric block, and most of the reasons for the damage of the vibration exciter are caused by locking due to poor lubrication of the bearing. The bearing of the large vibration exciter is stressed greatly and has high rotating speed, and if the bearing is lubricated by using dry oil, the requirement of the limit rotating speed can not be met, or the design life of the bearing needs to be shortened when the bearing is selected, which is very unfavorable for the normal use of the vibration exciter. The thin oil has good fluidity, so that the thin oil can work at a higher limit rotating speed, and has better cooling and cleaning effects in the working process, so that the thin oil has a very remarkable advantage in meeting the use requirement of a large vibration exciter, and the current trend is to use the thin oil to lubricate the vibration exciter of large vibration equipment. However, when lubricating a bearing of a vibration exciter by using thin oil in practice, due to the structural limitation of the existing vibration exciter, in order to meet the requirements of connection between an eccentric shaft of the vibration exciter and a rotary driving power source and installation of an eccentric block, two ends of the eccentric shaft of the vibration exciter need to extend out of a vibration exciter shell, so that certain gaps exist between the eccentric shaft rotating at a high speed and a fixed vibration exciter shell or a bearing end cover at a plurality of positions, and although various sealing elements such as O-shaped or lip-shaped rubber sealing rings can be installed at the gaps for sealing, the sealing elements inevitably have serious abrasion due to severe working conditions of large-scale vibration equipment, high-temperature and high-dust and strong vibration of a working environment, and can be rapidly damaged under extreme conditions, so that lubricating thin oil with good fluidity can be rapidly lost at the positions. If the problems occur and the lubricating thin oil cannot be timely found and supplemented and the sealing element is repaired, the bearing works in a thin oil-free lubricating state, so that the bearing can be quickly burnt and locked, the vibration equipment is stopped and overhauled, and serious influence and great loss are caused to production.
A second problem in the practical use of large and heavy vibrating screens is the tearing of the parts of the screen associated with the location where the exciter is installed. In the use process of the vibrating screen, the exciting force for promoting the vibrating screen to generate vibration is generally transmitted to the side plate of the vibrating screen connected with the vibrating screen from the cross beam for mounting the vibration exciter, and the cross beam of the existing vibrating screen is generally connected with the side plate from the inner part of the side plate of the vibrating screen. The exciting force of the heavy vibrating screen is very large, and the areas of the connecting parts between the cross beam and the side plates limited by the structure are generally small, so that the vibrating force borne and transmitted by the connecting parts in the working process of the vibrating screen is also very large, particularly, the vibration exciter is generally arranged in the middle of the side plates of the vibrating screen in the structure of the conventional vibrating screen, so that the exciting force generated by the vibration exciter generates very large bending moment at the connecting parts besides generating tensile force and shearing force on the side plates and related connecting parts, and the possibility of tearing the side plates and flanges at the connecting parts of the cross beam and the side plates of the vibrating screen is increased as a result. Once the tearing cracks appear at the parts, the welding repair effect of the cracks on site is very poor due to the existence of welding stress, the cracks can hardly be repaired, the cracks can reappear quickly even if the welding repair is carried out, and meanwhile, the appearance of the cracks damages the whole stress structure of the parts, so that the cracks rapidly expand, finally, the whole vibrating screen is scrapped, extremely serious economic loss is caused, and extremely serious influence is caused on production.
Therefore, in order to ensure the smooth popularization and normal use of the heavy vibrating screen under the condition of large-scale production, a new technical scheme is needed to solve the two serious problems existing in the actual production of the existing heavy vibrating screen.
Disclosure of Invention
It is an object of the present invention to provide such a heavy duty vibratory screening apparatus which effectively solves the aforementioned problems associated with the use of existing large and heavy duty vibratory screens in practice.
The purpose of the invention is realized as follows: the utility model provides a heavy vibration screening equipment, contains curb plate, vibration exciter, excitation girder, connects crossbeam, sieve, base, damping spring and excitation motor, curb plate, connection crossbeam and excitation girder constitution equipment frame, the sieve is installed in the equipment frame, the equipment frame passes through damping spring installs on the base, the excitation girder stretches out the curb plate outside, the vibration exciter is installed at the both ends position that the excitation girder stretches out the curb plate, excitation motor is dual output shaft motor, respectively with a set of universal joint coupling joint on the output shaft of both ends, the universal joint coupling other end with the drive shaft connection of vibration exciter, there is the contained angle of being no less than 15 degrees between drive shaft and the horizontal plane, installs the initiative conical gear on it, initiative conical gear meshes with the driven conical gear on the eccentric shaft I of horizontal arrangement, a driving cylindrical gear and an eccentric block I are arranged on two sides of the driven conical gear, the driving cylindrical gear is meshed with a driven cylindrical gear arranged on an eccentric shaft II, the two sides of the driven cylindrical gear are provided with eccentric blocks II, the structures and the sizes of the eccentric blocks I and the eccentric blocks II are the same, when the eccentric directions of the eccentric shaft I and the eccentric shaft II are vertical to the plane formed by the eccentric shaft I and the eccentric shaft II, the eccentric directions are consistent, when the eccentric directions of the eccentric shaft I and the eccentric shaft II are parallel to the plane formed by the eccentric shaft I and the eccentric shaft II, the eccentric directions are opposite, the left-right distance deviation between the symmetrical center line of the eccentric blocks at the two ends of the eccentric shaft of the vibration exciter and the center line of the side plate is not more than 3 times of the thickness of the side plate, and the driving conical gear, the driven conical gear, the driving cylindrical gear, the driven cylindrical gear, the eccentric block and bearings for supporting the eccentric shaft I and the eccentric shaft II are all sealed in the vibration exciter.
And the symmetrical center lines of the eccentric blocks at the two ends of the eccentric shaft of the vibration exciter are superposed with the center line of the side plate.
The side plate is characterized in that two sides of the side plate are connected with an inner reinforcing plate and an outer reinforcing plate through riveting structures, connecting plates and reinforcing ribs are welded on the inner reinforcing plate and the outer reinforcing plate, and the connecting plates are connected with the excitation girder through high-strength bolts or rivets.
The vibration exciter comprises a driving shaft, a vibration exciter shell and an oil return chamber, wherein a jacking end cover is arranged on the vibration exciter shell at the extending end of the driving shaft, the outer side of the jacking end cover is provided with the oil return chamber, the bottom of the oil return chamber is provided with an oil return hole, an oil return channel is arranged on the vibration exciter shell at the position corresponding to the oil return hole, and the oil return channel is communicated with the interior of the vibration exciter shell.
And an oil slinger is arranged on the driving shaft in the oil return chamber, and the end part of the oil slinger inclines towards the direction of tightly propping the end cover.
An oil baffle sheet is arranged on the inner wall of the upper part of the oil return chamber at the position corresponding to the oil slinger, the oil baffle sheet inclines towards the direction of tightly propping the end cover, the distance from the inner edge to the tightly propping end cover is smaller than that from the outer edge to the tightly propping end cover, and a gap which is not smaller than 10 mm is formed between the inner edge and the outer edge of the oil slinger in the radial direction.
And rubber sealing rings and felt ring seals are respectively arranged among the jacking end cover, the oil return chamber and the driving shaft.
And an included angle between the driving shaft and the eccentric shaft in the vertical direction is not more than 40 degrees.
The eccentric block I and the eccentric block II are arranged outside the vibration exciter shell, a closed cover and a closed shell are respectively adopted on the outer side wall of the vibration exciter shell to be closed, the closed shell is simultaneously coated with the driving shaft, an oil return chamber is connected to the outside of the closed shell, the driving shaft is coated with the oil return chamber, and an oil through hole communicated with the inside of the closed shell is formed in the bottom of the oil return chamber.
An oil slinger is mounted on a driving shaft in the oil return chamber, the end part of the oil slinger inclines towards the direction of tightly propping an end cover, an oil baffle sheet is arranged on the inner wall of the upper part of the oil return chamber at the position corresponding to the oil slinger, the oil baffle sheet inclines towards the direction of tightly propping the end cover, and a gap which is not less than 10 mm is formed between the inner edge of the oil baffle sheet and the outer edge of the oil slinger in the radial direction.
The vibration exciter is installed at the two ends of the extended side plate of the vibration exciting girder, the deviation between the left and right distance between the center line of the eccentric blocks at the two ends of the eccentric shaft of the vibration exciter (namely the resultant force position of the exciting force) and the center of the side plate is not more than 3 times of the thickness of the side plate, and the eccentric blocks are further overlapped with the side plate.
Adopt riveted structure to be connected with inboard reinforcing plate and outside reinforcing plate in curb plate both sides, welding connecting plate and strengthening rib on inboard reinforcing plate and the outside reinforcing plate, and adopt high-strength bolt or rivet to connect the connecting plate on the excitation girder, thus, the area of connecting the position between excitation girder and the curb plate has both been increased, the curb plate has also been improved simultaneously and has born the tensile area of vibration exciter, the effectual excitation force of the vibration exciter that bears on the adapting unit between curb plate and the excitation girder that has dispersed, adopt riveted structure or the high reliability of high-strength bolt connection structural connection in addition, thereby improved these positions greatly and resisted the vibration exciter excitation force and lead to its ability that the crackle appears.
The driving bevel gear, the driven bevel gear, the driving cylindrical gear, the driven cylindrical gear, the eccentric block, the eccentric shaft and the bearing for supporting the eccentric shaft are all sealed in the vibration exciter shell, and the part of the driving shaft extending out of the vibration exciter shell is supported and sealed by a jacking end cover. Since the driving shaft at the position has an upward inclination angle of at least 15 degrees, during the rotation of the driving shaft, if lubricating thin oil in the vibration exciter shell leaks from the position, the lubricating thin oil needs to overflow upwards, obviously, the overflow difficulty is much higher than that when the driving shaft is in a horizontal position, namely, the lubricating thin oil sealing performance of the position can be improved by inclining the driving shaft with the possibility of lubricating thin oil leakage upwards by a certain angle, and therefore, the structure has remarkable advantages.
An included angle of not less than 15 degrees is formed between a driving shaft and a horizontal plane, a driving conical gear is installed on the driving conical gear, the driving conical gear is meshed with a driven conical gear on an eccentric shaft I which is horizontally arranged, a driving cylindrical gear and an eccentric block I are installed on two sides of the driven conical gear, the driving cylindrical gear is meshed with a driven cylindrical gear installed on the eccentric shaft II, and eccentric blocks II are installed on two sides of the driven cylindrical gear, so that the eccentric shaft I and the eccentric shaft II can be driven to rotate through the rotation of the driving shaft, the eccentric direction of the eccentric block I and the eccentric block II is consistent when the eccentric direction of the eccentric block I and the eccentric block II is vertical to a plane formed by the eccentric shaft I and the eccentric shaft II, the eccentric direction of the eccentric block I and the eccentric block II is opposite when the eccentric direction of the eccentric block I and the eccentric block II is parallel to the plane formed by the eccentric shaft I and the eccentric shaft II, exciting forces generated in the vertical direction in the rotating process are superposed through a pair of mutually meshed gears, and the exciting forces generated in the horizontal direction are mutually offset to drive the vibrating screen to effectively vibrate in the vertical direction, so that an effective screening effect is generated. By arranging the two eccentric shafts which are meshed with each other, the exciting force of the vibration exciter is dispersed on the two shafts, the stress of each exciting shaft and the upper bearing device thereof can be effectively reduced, and the device has important significance for prolonging the service life of the vibration exciter.
The excitation motor adopts dual output shaft motor, respectively with a set of universal joint coupling joint on the output shaft of both ends, the universal joint coupling joint other end with the drive shaft connection of vibration exciter, like this, adopt a motor to realize the drive to two vibration exciters in both ends promptly, adopt the universal joint coupling joint to also solve a motor that the level was placed simultaneously and need all have the connection problem between the drive shaft of certain installation inclination with both ends, simple structure is practical reliable, and the advantage is obvious. The double-output-shaft vibration motor is arranged in the middle of the vibration exciting girder, the two ends of the double-output-shaft vibration motor are connected with the vibration exciters at the two ends through the universal joint coupler, the eccentric blocks on the vibration exciters at the two ends rotate at the same speed, when the vibration exciters are arranged, the eccentric blocks on the eccentric shafts at the two ends are ensured to be in the same position, and the synchronous work of the vibration exciters at the two ends can be ensured.
The eccentric shaft with the eccentric block rotating to generate exciting force is horizontally arranged, the driving shaft is arranged above the eccentric shaft, an included angle of not less than 15 degrees is formed between the driving shaft and the eccentric shaft, a bearing for supporting the driving shaft is axially fixed and positioned by adopting a jacking end cover, an oil return chamber for coating the driving shaft is arranged outside the jacking end cover, an oil return hole is formed in the bottom of the oil return chamber, an oil return channel is formed in a vibration exciter shell at a position corresponding to the oil return hole, and the oil return channel is communicated with the interior of the vibration exciter shell. Therefore, even when lubricating thin oil is leaked outwards from a gap between the driving shaft and the abutting end cover, the lubricating thin oil can be collected at the bottom of the oil return chamber due to the fact that the oil return chamber has a certain inclination, and the lubricating thin oil flows back to the interior of the vibration exciter shell through an oil return hole and an oil return channel at the bottom of the oil return chamber, so that the lubricating thin oil is prevented from losing, and the quantity of the lubricating thin oil in the vibration exciter shell is guaranteed to be stable.
In order to solve the possible problem, an oil slinger with the end part inclined towards the direction of a propping end cover is installed on the driving shaft in the oil return chamber, and the end part of the oil slinger is inclined towards the direction of the propping end cover, so that the lubricating thin oil splashed out from the gap is blocked by the oil slinger rotating at a high speed, is thrown towards the inner wall of the oil return chamber on one side of the propping end cover through centrifugal force, and finally flows to the bottom of the oil return chamber and flows back to the interior of the vibration exciter shell for circulation.
In the process of throwing oil by the oil slinger, the lubricating thin oil still has the splashing problem, the splashed lubricating thin oil can overflow the oil return chamber, in particular the lubricating thin oil thrown up at the upper half part of the oil return chamber, therefore, the annular oil baffle piece inclined towards the direction of tightly propping the end cover is arranged on the inner wall of the upper part of the oil return chamber at the position corresponding to the oil slinger, the distance from the inner edge of the oil baffle piece to the tightly propping end cover is less than that from the outer edge of the oil slinger to the tightly propping end cover, and a gap of not less than 10 mm is arranged between the inner edge and the outer edge of the oil slinger in the radial direction, the structure is used for blocking and guiding the lubricating thin oil splashed from the oil slinger to the bottom of the oil return chamber, in the process, as the oil baffle piece is inclined towards the direction of tightly propping the end cover and has a certain gap with the outer edge of the oil slinger, the lubricating thin oil thrown out from the oil slinger can be prevented from hitting the outer surface of the oil baffle piece, meanwhile, lubricating thin oil accumulated on the inner side of the oil baffle can smoothly slide to the bottom of the oil return chamber without being hindered by the oil slinger and smoothly flow back to the interior of the vibration exciter shell from the bottom of the oil return chamber, so that the lubricating thin oil is prevented from leaking and losing.
The clearance between the tight end cover in top and the drive shaft adopts rubber seal to seal, can further prevent that lubricated thin oil from overflowing from this clearance, improves the sealing performance in this clearance. Even if the rubber sealing ring at the position is damaged, the lubricating thin oil can be prevented from being lost too fast due to the oil collecting function of the oil return chamber. The sealing performance of the vibration exciter can be ensured by replacing the rubber sealing ring during equipment maintenance. And a felt ring seal is arranged between the oil return chamber and the driving shaft, and lubricating grease is injected into the sealed felt ring and the sealing groove, so that lubricating thin oil can be further prevented from leaking from the oil return chamber.
If the included angle between the driving shaft and the eccentric shaft is too large, the overall dimension of the vibration exciter is greatly increased, and the transmission efficiency of the bevel gear is influenced, so that the included angle between the driving shaft and the eccentric shaft in the vertical direction is set to be not more than 40 degrees, and the comprehensive effects of efficiency, size and lubricating oil leakage prevention are achieved.
The eccentric block is arranged outside the vibration exciter shell, the closed cover and the closed shell are respectively adopted on the outer side wall of the vibration exciter shell to be sealed, the closed shell is simultaneously coated with the driving shaft, the eccentric block is placed outside the vibration exciter shell by the structure, the structure which is sealed is carried out on the whole vibration exciter rotary part outside the vibration exciter shell by the structure, although the complexity of the vibration exciter is slightly increased, the maintenance of the vibration exciter is facilitated, meanwhile, the eccentric block is placed outside the vibration exciter shell, the eccentric block can also throw lubricating thin oil from the outside of the vibration exciter shell to lubricate the support bearing, and the lubricating performance of the bearing is improved. The oil return chamber, the oil slinger and the oil baffle sheet are arranged outside the closed shell, and the purpose and the effect of the oil return chamber, the oil slinger and the oil baffle sheet are the same as those of the above components arranged on the abutting end cover.
Therefore, through the special structural design of the vibration exciter bearing, the sealing and lubricating performance of the vibration exciter bearing and the stress value and the stress condition of the side plate are greatly improved, the problems that the connecting part of the side plate and the vibration exciting girder is torn frequently and the vibration exciter bearing is frequently damaged in the actual use process of the heavy vibrating screen can be effectively solved, and the vibration exciter bearing has particularly obvious excellent performance.
Drawings
Fig. 1, fig. 2, fig. 3 and fig. 4 are structural diagrams showing a first embodiment of the present invention, in which fig. 1 is a front view of the first embodiment, fig. 2 is a sectional view taken from a position a to a in fig. 1, fig. 3 is a sectional view taken from a position B to B in fig. 2, and fig. 4 is a sectional view taken from a position C to C in fig. 2. Fig. 5 is a sectional view showing a schematic diagram of a vibration exciter according to a second embodiment of the present invention.
Detailed Description
Fig. 1, 2, 3, 4 and 5 show a schematic structural diagram of two embodiments of the present invention, and in these 5 figures, the number of the parts has the following meaning: 1. mounting holes; 2. a vibration exciter shell; 3. a radial thrust bearing; 4. an eccentric shaft I; 5. a metal connecting bond; 6. a collar; 7. an eccentric block I; 8. a driven bevel gear; 9. a driving bevel gear; 10. a positioning ring; 11. a hold-down bolt; 12. sealing the felt pad; 13. tightly propping the end cover; 14. an oil baffle sheet; 15. an O-shaped rubber sealing ring; 16. an oil slinger; 17. fixing the bolt; 18. an oil return chamber; 19. an excitation motor; 20. a motor mounting bracket; 21. an oil return hole; 22. an oil return passage; 23. closing the end cap; 24. sealing the felt ring; 25. lubricating thin oil; 26. a drive shaft; 27. a coupler 30 and a base; 31. a spring support; 32. a spring; 33. a motor bracket; 34. connecting the cross beam; 35. an outer reinforcing rib; 36. a side plate; 37. an outer stiffening plate; 38. riveting; 39. a side connecting plate; 40. an outer bottom connecting plate; 41. an inner side reinforcing plate; 42. an inner bottom connecting plate; 43. an inner reinforcing rib; 44. exciting a girder; 45. installing a bolt; 46. mounting a nut; 47. a sieve plate; 49. an eccentric shaft II; 50. an eccentric block II; 51. a driven cylindrical gear; 52. a gland; 53. a gland bolt; 54. a closure cap; 55. a closed housing; 56. a communicating hole; 57. an oil penetration hole; 58. a driving cylindrical gear; 59. an air cleaner; 60. oil marks; 61. pressing the end cover; 62. a screw; 63. and a balancing weight.
In the present embodiment, the screen frame composed of the excitation girder 44, the side plates 36 and the connecting beam 34 is mounted on the base 30 through the springs 32 and the spring supports 31, and the screen plate 47 is mounted on the connecting beam. The excitation girder is connected with a side connecting plate 39, an inner bottom connecting plate 42 and an outer bottom connecting plate 40 through rivets 38, an inner reinforcing plate 41 and an outer reinforcing plate 37 are riveted on the side plates, the outer reinforcing ribs 35 are connected with the side connecting plate, the outer reinforcing plate and the outer bottom connecting plate through welding structures, and the inner reinforcing ribs 43 are connected with the inner reinforcing plate, the side connecting plate and the inner bottom connecting plate through welding processes. The motor mounting frame is mounted on an equipment foundation through a motor support 33, a double-output-shaft motor 19 is mounted on a motor mounting frame 20, two ends of the double-output-shaft motor are connected with a universal joint coupler 27, a vibration exciter is mounted at two ends of a vibration exciting girder through a mounting hole 1 in the vibration exciter by using a mounting bolt 45 and a mounting nut 46, the other end of the universal joint coupler is connected with a driving shaft 26 of the vibration exciter, the driving shaft penetrates through a jacking end cover 13 and an oil return chamber 18 and is respectively sealed with the oil return chamber and the jacking end cover by using a sealing felt 24 and an O-shaped rubber sealing ring 15, the jacking end cover and the oil return chamber are fixed on a vibration exciter shell 2 by using a compression bolt 11 and are statically sealed with the vibration exciter shell by using a sealing felt 12, and the sealing felt is also used for statically sealing between the end cover and the vibration exciter shell. The oil return chamber is connected with the abutting end cover into a whole and covers part of the driving shaft, an oil slinger 16 is connected to the driving shaft covered by the oil return chamber through a fixing bolt 17, the end part of the oil slinger inclines towards the abutting end cover, an oil baffle sheet 14 is installed on the inner wall of the oil return chamber corresponding to the oil slinger, the oil baffle sheet is disconnected at the lower half part of the oil return chamber, the distance from the inner edge of the oil baffle sheet to the abutting end cover is smaller than the distance from the outer edge of the oil slinger to the abutting end cover, and a 15-millimeter interval is reserved between the inner edge of the oil baffle sheet and the outer edge of the oil slinger. In order to strengthen the functions of the oil slinger and the oil baffle sheet, two oil baffle sheets and two oil slingers are arranged. And an oil return hole 21 is formed in the bottom of the oil return chamber, an oil return channel 22 is formed in the vibration exciter shell connected with the oil return hole, and the oil return channel inclines downwards on the vibration exciter shell and is communicated with the interior of the vibration exciter shell. The drive shaft is installed on radial thrust bearing 3, and initiative conical tooth wheel 9 is installed to the centre, and on I4 of eccentric shaft was installed to driven conical tooth wheel 8 with initiative conical tooth wheel engaged with, driven conical tooth wheel both sides were eccentric block I7, install initiative cylindrical gear 58 on eccentric shaft I, install on eccentric shaft II 49 with driven cylindrical tooth wheel engaged with driven cylindrical gear 51, and eccentric block II 50 is installed in cylinder driven gear both sides. The structure size of the eccentric block I is the same as that of the eccentric block II, but the installation position ensures that the eccentric direction is consistent when the eccentric position of the eccentric block is vertical to the connecting surface between the two shafts, and the eccentric direction is opposite when the connecting surface between the eccentric block and the two shafts is parallel. When the vibration exciter is installed, the center lines of the two eccentric blocks at the two ends of the eccentric shaft are coincident with the center line of the side plate, the gears, the eccentric blocks and the shaft are circumferentially positioned by adopting metal connecting keys 5, the axial positioning of the parts is realized by adopting a jacking end cover or a closed end cover 23 to jack the outer ring of the centripetal thrust bearing from one end, and the parts are sleeved on a shaft collar 6 and a positioning ring 10 on the relevant shaft and a shaft hole and a hole table on the vibration exciter shell and a bearing at the other end. The included angle between the driving shaft and the eccentric shaft I is 20 degrees.
Before the vibration exciter works, lubricating thin oil 25 for lubrication is added into the vibration exciter shell, and the liquid level of the lubricating thin oil is not lower than the bottommost positions of the eccentric block, the driven conical gear and the driven cylindrical gear of the vibration exciter. An air filter 59 is arranged at the upper part of the vibration exciter shell, lubricating thin oil can be supplemented from the position, meanwhile, the free circulation of air inside and outside the vibration exciter shell can be ensured due to the change of temperature, and an oil pointer 60 is arranged on the side surface of the bottom of the vibration exciter shell and used for observing the position of the lubricating thin oil liquid level in the vibration exciter shell.
When the vibration exciter works, a motor with double output shafts is started, the motor with double output shafts drives a universal joint coupler connected with the motor through output shafts at two ends to rotate, the universal joint coupler drives a driving shaft of the vibration exciter arranged on a vibration exciting girder to rotate, the driving shaft drives a driven conical gear meshed with the driving shaft to rotate through a driving conical gear arranged on the driving shaft, the driven conical gear drives an eccentric shaft I and an eccentric block I on the eccentric shaft to rotate, and simultaneously drives an eccentric shaft II and an eccentric block II to rotate at the same speed in opposite directions through a pair of cylindrical gears meshed with each other arranged on two shafts, because of the structural size and the arrangement characteristics of the eccentric blocks on the two shafts, the exciting forces generated by the eccentric blocks on the two shafts with opposite rotation directions are mutually superposed in the vertical direction of a plane formed by the axes of the two shafts and mutually offset in the parallel direction, namely under the driving of the eccentric block of the vibration exciter, the heavy vibration screening equipment vibrates linearly along the vertical direction of the connecting line of the two excitation shafts. Because two excitation eccentric shafts are arranged on one vibration exciter, the stress state of the bearing on each excitation shaft is dispersed, and the service life of the vibration exciter is prolonged.
Because the exciting force generated by the eccentric block of the vibration exciter arranged on the vibration exciting girder is superposed with the center of the side plate, the vibration exciting girder and the side plate are only stressed by the tension force along the width direction of the side plate but not by the bending moment force along the height direction in the process that the vibration exciter drives the heavy type vibration screening equipment to vibrate, thus the stress condition of the vibration exciting girder and the side plate is improved, the stress value is reduced, and the vibration exciting girder, the side plate and the connecting part can effectively improve the performance of resisting vibration cracks.
Pass through welded structure and connection bottom plate with outside stiffening plate and inboard stiffening plate, connect curb plate and strengthening rib welding together, and adopt riveted structure to link together outside stiffening plate and inboard stiffening plate and curb plate and excitation girder, can disperse the atress at excitation girder and curb plate connection position outside stiffening plate like this, inboard stiffening plate and connection bottom plate, a plurality of positions such as connection curb plate, thereby greatly reduced excitation girder and curb plate adapting unit between stress concentration phenomenon, thereby further improve the possibility that the crackle was torn in the vibration appears at these positions.
During the working process of the vibration exciter, the eccentric block and the bevel gear which rotate at high speed drive lubricating thin oil at the bottom of the vibration exciter shell and throw the lubricating thin oil to each part inside the vibration exciter shell, including the centripetal thrust bearing, so that the bearing is lubricated well. Because the bearing of the vibration exciter can be well lubricated by lubricating thin oil, the large-load bearing can be used for improving the rated exciting force of the vibration exciter, so that the vibration exciter can be ensured to be applied to large or heavy vibration equipment.
Because the side surface of the vibration exciter shell is sealed by adopting the closed end cover, the abutting end cover and the oil return chamber, other parts of the vibration exciter shell are of a totally-enclosed structure except for a driving shaft rotating at a high speed, the abutting end cover and the oil return chamber, and the sealing performance of the vibration exciter can be ensured as long as lubricating thin oil for lubrication is prevented from leaking out from a gap between the driving shaft and the oil return chamber. In the working process of the vibration exciter, lubricating thin oil brought up by the eccentric block and the bevel gear enters the bearing close to one side of the jacking end cover, the bearing rotates at a high speed to throw the lubricating thin oil to all directions, but the driving shaft inclines upwards by 20 degrees, so that the difficulty of throwing the lubricating thin oil to the inclined upper part is high, meanwhile, an O-shaped rubber sealing ring is adopted between the driving shaft and the jacking end cover for sealing, the overflow of the lubricating thin oil is further limited, and the sealing performance of the part is ensured. Even if the O-shaped rubber sealing ring is abraded due to long-time work or accidentally damaged, after lubricating thin oil splashes out of the gap, the lubricating thin oil is blocked by the oil slinger on the driving shaft and the oil baffle sheet on the inner wall of the oil return chamber, is finally accumulated at the bottom of the oil return chamber under the action of throwing of the oil slinger and blocking of the oil baffle sheet, and flows back to the inside of the vibration exciter shell through the oil return hole and the oil return channel at the bottom of the oil return chamber, so that the effect that the lubricating thin oil circulates inside and outside the vibration exciter shell instead of overflowing and losing outwards is achieved. When the extremely small amount of lubricating thin oil which is not blocked by the oil blocking sheet and the oil slinger reaches a gap part between the oil return chamber and the driving shaft, the sealing felt ring is arranged at the part, so that the lubricating thin oil can be completely blocked from leaking, and the lubricating thin oil is ensured to be accumulated downwards in the bottom of the inclined oil return chamber and finally flows back into the shell of the vibration exciter. Therefore, in actual work, as long as the O-shaped rubber sealing ring and the sealing felt ring are regularly checked and updated, the lubricating thin oil in the vibration exciter shell can be ensured not to be leaked under the condition that the O-shaped rubber sealing ring and the sealing felt ring are not damaged simultaneously, and even if the O-shaped rubber sealing ring and the sealing felt ring are damaged simultaneously under the extreme condition, the lubricating thin oil cannot be leaked quickly due to the structural design of the special oil return chamber, the oil slinger and the oil baffle plate of the vibration exciter, so that the lubricating performance of a heavy-load bearing is ensured, and the service performance of the vibration exciter under the heavy-load exciting force condition is finally ensured.
Two oil slingers and oil baffle sheets are arranged in the oil return chamber, so that the function of preventing lubricating thin oil from overflowing can be further improved.
In the exciter of the second embodiment shown in fig. 5, the eccentric mass on the eccentric shaft is placed outside the exciter housing, in order to ensure the overall sealing effect of the exciter, a sealing cover 54 and a sealing housing 55 are respectively installed on the left and right side walls outside the exciter housing, a sealing felt pad 12 is used between the sealing cover and the sealing housing and the outer wall of the exciter for full-area static sealing, and only a gap for ensuring relative rotation motion is left between the sealing housing and the driving shaft. An oil return chamber 18 which covers the driving shaft 26 is also arranged at the upper part of the closed shell, an oil penetrating hole 57 which is communicated with the inside of the closed shell is arranged at the bottom of the oil return chamber, an oil slinger 16 is arranged on the driving shaft in the oil return chamber, the end part of the oil slinger inclines towards the direction of tightly propping the end cover, an oil baffle sheet 14 which inclines towards the direction of tightly propping the end cover is arranged on the inner wall of the upper part of the oil return chamber at the position corresponding to the oil slinger, and a 15 mm gap is formed between the inner edge of the oil baffle sheet and the outer edge of the oil slinger in the radial direction. Since the eccentric mass is installed at both ends of the eccentric shaft, the eccentric mass is press-fitted to the eccentric shaft using the pressing cover bolt 53 and the pressing cover 52, and the weight block 63 is coupled to the eccentric mass using the screw 62. The bottom of the vibration exciter shell is provided with a communicating hole 56, so that lubricating thin oil inside and outside the vibration exciter shell can be communicated and can flow freely, and the eccentric block and the gear can be lubricated by throwing oil at the same time. The radial thrust bearing, the driven conical gear and the driving cylindrical gear are axially positioned by the pressing end cover 61.
For placing the eccentric block inside the vibration exciter shell, the eccentric block is external, so that the adjustment of the weight of the eccentric block of the vibration exciter is facilitated, namely the adjustment of the excitation force of the vibration exciter, when the excitation force of the vibration exciter needs to be adjusted, the closed cover and the closed shell are detached, the purpose of adjusting the excitation force of the vibration exciter is achieved by increasing or decreasing the number of the balancing weights on the eccentric block, and compared with an internal structure of the eccentric block, the external structure is very obvious, so that the adjustment of the excitation force of the vibration exciter is more convenient. In addition, simultaneously because place the eccentric block outside the vibration exciter casing, the eccentric block also can throw up lubricated thin oil from vibration exciter casing outside and lubricate support bearing, also the support bearing can follow inside and outside injection and the outflow of lubricated thin oil of vibration exciter casing simultaneously, has improved the lubricating property of bearing, is favorable to vibration exciter life's improvement.
The oil return chamber, the oil slinger and the oil baffle sheet are arranged outside the closed shell, and the purpose and the effect of the oil return chamber, the oil slinger and the oil baffle sheet are the same as those of the above components arranged on the abutting end cover.
Claims (10)
1. The utility model provides a heavy vibration screening equipment, contains curb plate, vibration exciter, excitation girder, connects crossbeam, sieve, base, damping spring and excitation motor, curb plate, connection crossbeam and excitation girder constitute the equipment frame, the sieve is installed in the equipment frame, the equipment frame passes through damping spring installs on the base, its characterized in that: the vibration exciter is arranged at the two ends of the extending side plate of the vibration exciting girder, the vibration exciting motor is a motor with double output shafts, output shafts at the two ends are respectively connected with a set of universal joint coupling, the other end of the universal joint coupling is connected with a driving shaft of the vibration exciter, an included angle of not less than 15 degrees is formed between the driving shaft and the horizontal plane, a driving conical gear is arranged on the driving conical gear and is meshed with a driven conical gear on a horizontally arranged eccentric shaft I, a driving cylindrical gear and an eccentric block I are arranged at the two sides of the driven conical gear, the driving cylindrical gear is meshed with a driven cylindrical gear arranged on the eccentric shaft II, eccentric blocks II are arranged at the two sides of the driven cylindrical gear, the structures and the sizes of the eccentric blocks I and the eccentric blocks II are the same, and when the eccentric directions of the driving conical gear and the driven conical gear are vertical to a plane formed by the eccentric shaft I and the eccentric shaft II, when the eccentric directions of the eccentric shaft I and the eccentric shaft II are parallel to a plane formed by the eccentric shaft I and the eccentric shaft II, the eccentric directions are opposite, the left-right distance deviation between the symmetrical center line of the eccentric blocks at the two ends of the eccentric shaft of the vibration exciter and the center line of the side plate is not more than 3 times of the thickness of the side plate, and the driving bevel gear, the driven bevel gear, the driving cylindrical gear, the driven cylindrical gear, the eccentric block and the bearings for supporting the eccentric shaft I and the eccentric shaft II are all sealed in the vibration exciter.
2. The heavy vibratory screening apparatus of claim 1, wherein: and the symmetrical center lines of the eccentric blocks at the two ends of the eccentric shaft of the vibration exciter are superposed with the center line of the side plate.
3. The heavy vibratory screening apparatus of claim 1, wherein: the side plate is characterized in that the two sides of the side plate are connected with an inner side reinforcing plate and an outer side reinforcing plate through riveting structures, connecting plates and reinforcing ribs are welded on the inner side reinforcing plate and the outer side reinforcing plate, and the connecting plates are connected with the excitation girder through high-strength bolts or rivets.
4. The heavy vibratory screening apparatus of claim 3, wherein: the vibration exciter comprises a driving shaft, a vibration exciter shell and an oil return chamber, wherein a jacking end cover is arranged on the vibration exciter shell at the extending end of the driving shaft, the outer side of the jacking end cover is provided with the oil return chamber, the bottom of the oil return chamber is provided with an oil return hole, an oil return channel is arranged on the vibration exciter shell at the position corresponding to the oil return hole, and the oil return channel is communicated with the interior of the vibration exciter shell.
5. The heavy vibratory screening apparatus of claim 4, wherein: and an oil slinger is arranged on the driving shaft in the oil return chamber, and the end part of the oil slinger inclines towards the direction of tightly propping the end cover.
6. The heavy vibratory screening apparatus of claim 5, wherein: an oil baffle sheet is arranged on the inner wall of the upper part of the oil return chamber at the position corresponding to the oil slinger, the oil baffle sheet inclines towards the direction of tightly propping the end cover, the distance from the inner edge to the tightly propping end cover is smaller than that from the outer edge to the tightly propping end cover, and a gap which is not smaller than 10 mm is formed between the inner edge and the outer edge of the oil slinger in the radial direction.
7. The heavy vibratory screening apparatus of claim 4, wherein: and rubber sealing rings and felt ring seals are respectively arranged among the jacking end cover, the oil return chamber and the driving shaft.
8. The heavy vibratory screening apparatus of claim 7, wherein: the included angle between the driving shaft and the eccentric shaft in the vertical direction is not more than 40 degrees.
9. A heavy vibrating screen apparatus as claimed in claim 1 or 2 or 3, wherein: the eccentric block I and the eccentric block II are arranged outside the vibration exciter shell, a closed cover and a closed shell are respectively adopted on the outer side wall of the vibration exciter shell to seal, the closed shell is simultaneously coated with the driving shaft, an oil return chamber is connected to the outside of the closed shell, the oil return chamber is coated with the driving shaft, and an oil penetrating hole communicated with the inside of the closed shell is formed in the bottom of the oil return chamber.
10. The heavy vibratory screening apparatus of claim 9, wherein: an oil slinger is mounted on a driving shaft in the oil return chamber, the end part of the oil slinger inclines towards the direction of tightly propping an end cover, an oil baffle sheet is arranged on the inner wall of the upper part of the oil return chamber at the position corresponding to the oil slinger, the oil baffle sheet inclines towards the direction of tightly propping the end cover, and a gap which is not less than 10 mm is formed between the inner edge of the oil baffle sheet and the outer edge of the oil slinger in the radial direction.
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| CN202010262058.9A CN111420865B (en) | 2020-04-06 | 2020-04-06 | Heavy vibrating screening equipment |
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| CN202010262058.9A CN111420865B (en) | 2020-04-06 | 2020-04-06 | Heavy vibrating screening equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208727993U (en) * | 2018-09-03 | 2019-04-12 | 河南通泰机械有限公司 | A kind of thin oil lubricant Complex-frequency screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1135402A (en) * | 1965-03-18 | 1968-12-04 | Russell Const Ltd | Improvements in or relating to vibratory mountings |
| US3703236A (en) * | 1970-07-31 | 1972-11-21 | Fmc Corp | Vibrator mounting |
| CN2607203Y (en) * | 2003-04-04 | 2004-03-24 | 陆信 | Single-beam exciting screen |
| CN200970581Y (en) * | 2006-11-10 | 2007-11-07 | 西南石油大学 | Multiple vibration novel vibration sieve based on rigid moving synthesis |
| CN101722146A (en) * | 2008-10-29 | 2010-06-09 | 樊建春 | Duplex-bearing self-adjusting aligning web plate type round vibrating screen |
| CN201735521U (en) * | 2010-08-03 | 2011-02-09 | 鞍山重型矿山机器股份有限公司 | Vibrating sieve driven by motor |
| CN202238598U (en) * | 2011-10-18 | 2012-05-30 | 郭军 | Sealing structure and internal circulation lubrication structure for vibration exciter of vibrating screen |
| CN103949393B (en) * | 2014-05-19 | 2016-09-07 | 湖南兆晟矿山机械有限公司 | A kind of oval linear vibrating screen |
| CN106192688A (en) * | 2016-08-31 | 2016-12-07 | 广西恒日科技股份有限公司 | A kind of eccentric vibration mechanism |
| CN207971061U (en) * | 2017-12-30 | 2018-10-16 | 康东磊 | A seating motor synchronizing thin oil vibration generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208727993U (en) * | 2018-09-03 | 2019-04-12 | 河南通泰机械有限公司 | A kind of thin oil lubricant Complex-frequency screen |
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