CN107477150B

CN107477150B - Flexible starting intelligent transmission system for coal mine scraper conveyor

Info

Publication number: CN107477150B
Application number: CN201710707273.3A
Authority: CN
Inventors: 王进军; 陈云; 孔进; 吴爱民; 涂伟
Original assignee: Ningxia Tiandi Benniu Industrial Group Co Ltd
Current assignee: Ningxia Tiandi Benniu Industrial Group Co Ltd
Priority date: 2017-08-17
Filing date: 2017-08-17
Publication date: 2020-01-24
Anticipated expiration: 2037-08-17
Also published as: CN107477150A

Abstract

A flexible start intelligent transmission system for a coal mine scraper conveyor comprises a soft start permanent magnet device, a chain tightener and a reduction box, wherein an input shaft of a motor of the scraper conveyor is in splined connection with an input shaft of the soft start permanent magnet device; when the scraper conveyor is started, the motor drives the conductor disc to cut magnetic lines of force in a strong magnetic field generated by the permanent magnet disc, eddy current is generated in the conductor disc, the eddy current generates an induction magnetic field around the conductor disc, and the conductor disc and the permanent magnet disc are prevented from moving relatively, so that torque transmission between the motor and the speed reducer is realized, and soft start is realized by prolonging the time for balancing the rotating speeds of the conductor disc and the permanent magnet disc; when the load of the scraper conveyor reaches the protection torque value set by the permanent magnet device, the rotating speed of the permanent magnet disc is reduced to realize overload protection, so that the equipment is prevented from being damaged by overload.

Description

Flexible starting intelligent transmission system for coal mine scraper conveyor

Technical Field

The invention relates to the field of scraper conveyor equipment, in particular to a flexible starting intelligent transmission system for a coal mine scraper conveyor.

Background

The traditional reducer box body for the scraper conveyor motor is divided into an upper box body and a lower box body, and is connected through a box closing bolt, so that the structure is loose, the assembly is complex, and the cooling effect is poor. On the other hand, an elastic coupling, a hydraulic coupler and a torque-limiting friction clutch are connected between the motor of the scraper conveyor and the speed reducer. The elastic coupling does not protect equipment from overload, has a certain buffering effect on small impact and has an unobvious effect; when the hydraulic coupler is overloaded, the temperature rises, a cooling system is not provided, the fusible plug is frequently damaged and needs frequent maintenance, and the use is inconvenient; the friction torque is reduced after the torque-limiting friction clutch is slipped in an overload mode, the torque needs to be adjusted again after the torque-limiting friction clutch is used for a period of time, the maintenance cost is high underground, meanwhile, the friction plate slips for a long time, the heat generated by friction is easy to anneal the friction plate, and the friction plate is invalid after the hardness is reduced.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problem to be solved by the invention is to provide a flexible start intelligent transmission system for a coal mine scraper conveyor, wherein a water-cooled overload protection soft start permanent magnet device is arranged between a scraper conveyor motor and a speed reducer, a transmission torque is generated by utilizing an induction magnetic field, no abrasion is generated during overload protection, only heat is generated, the heat is taken away by a cooling system designed on a shell, the performance is reliable, the maintenance workload is small, and the flexible start intelligent transmission system has a soft start function and an overload protection function. Meanwhile, the cooling system of the input shaft of the speed reducer and the box body are integrally designed, and the cooling water jacket on the box body directly cools the outer ring of the bearing, so that the structure is compact, and the cooling effect is better.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a flexible start intelligent transmission system for a coal mine scraper conveyor comprises a soft start permanent magnet device, a chain tightener and a reduction box, wherein an input shaft of the soft start permanent magnet device is sleeved on an input shaft of a scraper conveyor motor, the input shaft of the scraper conveyor motor is in splined connection with the input shaft of the soft start permanent magnet device, the input shaft of the soft start permanent magnet device is sleeved on the input shaft connected with the reduction box, a transmission shaft of the soft start permanent magnet device is in splined connection with the input shaft connected with the reduction box, the chain tightener is sleeved on the transmission shaft of the soft start permanent magnet device, and the chain tightener is in splined connection with the transmission shaft of the soft start permanent magnet device; the soft start permanent magnet device comprises a shell, an end cover, a cooling medium cavity, an input shaft, a conductor disc bracket, a bearing disc, a conductor disc, a permanent magnet disc and a transmission shaft, wherein the conductor disc comprises a conductor disc A and a conductor disc B, the permanent magnet disc comprises the permanent magnet disc A and the permanent magnet disc B, the shell is wrapped at the outermost periphery, the inner wall of the shell is provided with the cooling medium cavity, one end opening of the shell is sealed by a disc-shaped end cover, the A end of the input shaft penetrates through the end cover, the A end of the input shaft is connected with the end cover shaft, the B end of the input shaft is sleeved outside one end of the transmission shaft, the B end of the input shaft is connected with a transmission shaft bearing, a rotating shaft penetrates through the permanent magnet disc A and the permanent magnet disc B, the permanent magnet disc A and the permanent magnet disc B are both sleeved and fixed on the transmission shaft, the bearing disc is sleeved outside the other end of the transmission shaft, the transmission shaft is connected, the conductor disc support comprises a disc surface A, a closed ring and a disc surface B, wherein an opening at one end of the cylindrical annular closed ring is fixedly connected with the annular disc surface A, an opening at the other end of the closed ring is fixedly connected with the annular disc surface B, a conductor disc A is fixedly installed on the inner wall of the disc surface A, a permanent magnet disc A is arranged on the other side of the conductor disc A, a conductor disc B is fixedly installed on the inner wall of the disc body B, a permanent magnet disc B is arranged on the other side of the conductor disc B, the disc surface A is sleeved and fixed on the outer side of the end B of the input shaft, the disc surface B is fixedly connected with one end of the bearing disc, the input shaft drives the conductor disc support to rotate, and the rotating conductor disc support drives a transmission shaft provided; the reduction gearbox comprises an end cover A, a box body with a cooling water jacket, an end cover B and an integral three-level conical cylindrical planetary gear reducer, wherein the box body with the cooling water jacket comprises an outer shell, the cooling water jacket, a first-level shaft cylinder, a second-level shaft cylinder, a third-level shaft cylinder and a fourth-level shaft cylinder, the side surface of the outer shell is provided with the first-level shaft cylinder, the periphery of the first-level shaft cylinder is provided with the cooling water jacket, an opening at the upper part of the outer shell is fixedly connected with the end cover A, the lower part of the outer shell is provided with the second-level shaft cylinder at one side close to the first-level shaft cylinder, the fourth-level shaft cylinder is arranged at the lower part of the outer shell side by side, the third-level shaft cylinder which is concentric with the fourth-level shaft cylinder is arranged at one side close to the inner cavity of the outer, the integral three-level conical cylindrical planetary gear reducer comprises a first-level shaft system, a second-level shaft system, a third-level shaft system and a fourth-level shaft system, wherein the first-level shaft system comprises an input shaft and a first-level conical gear, the second-level shaft system comprises a second-level shaft, a second-level conical gear and a second-level cylindrical gear, the third-level shaft system comprises a third-level shaft, a third-level cylindrical gear and a third-level internal gear, and the fourth-level shaft system comprises a fourth-level shaft, a sun gear, a fourth-level external gear, a fourth-level planetary gear, peripheral fixed; an input shaft bearing is fixed in a first-stage shaft barrel, one end of the input shaft is a free end extending out of a box body, a first-stage conical gear is arranged on the periphery of the other end of the input shaft, an upper end bearing of a second-stage shaft is fixed on an end cover A, a lower end bearing of the second-stage shaft is fixed on a second-stage shaft barrel, a second-stage cylindrical gear and a second-stage conical gear are arranged in the middle of the second-stage shaft, the second-stage conical gear is meshed with the first-stage conical gear, the number of teeth of the second-stage conical gear is larger than that of the first-stage conical gear, the third-stage shaft and the second-stage shaft are arranged on the end cover A in parallel, a lower end bearing of the third-stage shaft is fixed on the end cover A, a third-stage cylindrical gear is arranged on the third-stage shaft, the third, a sun gear is arranged at one end of the four-stage shaft and meshed with the three-stage internal gear, a four-stage external gear is arranged in the middle of the four-stage shaft, a four-stage planetary gear is arranged on the periphery of the four-stage shaft, peripheral fixed teeth are fixed on a four-stage shaft cylinder on the periphery of the four-stage planetary gear, an output shaft is arranged at the lower part of the four-stage planetary gear, an output shaft bearing is fixed on an end cover B, the four-stage planetary gear is meshed with the four-stage external gear, and meanwhile, the four-stage planetary gear is meshed with the peripheral fixed teeth, and the four-; the chain tightener comprises a gear box, a hydraulic motor, a driving gear, an idler, a connecting rod, a handle and a chain tightening gear, wherein the driving gear, the idler, the connecting rod and the chain tightening gear are arranged in the gear box, the gear box is connected with a shell of the soft start permanent magnet device through a flange, a driving shaft of the hydraulic motor penetrates through the side wall of the gear box and is fixedly connected with a rotating shaft of the driving gear, the driving gear is meshed with the idler, a through hole is formed in the center of the idler, a first end of the connecting rod is sleeved in the through hole of the idler, the connecting rod is L-shaped, a through hole is formed in the corner of the connecting rod and corresponds to the through hole, a pin rod matched with the through hole of the connecting rod is arranged on the side wall of the gear box, so that the connecting rod is sleeved on the pin rod and can rotate around the pin rod, the rotating shaft of the chain tightening gear is sleeved on the transmission shaft of the soft start permanent magnet device, the rotating shaft of the chain tightening gear is in splined connection with the transmission shaft of the soft start permanent magnet device, and the hydraulic motor provides power to drive the chain tightening gear and the transmission shaft of the soft start permanent magnet device to rotate, so that the scraper chain is driven.

Optimally, the cooling medium cavity of the soft start permanent magnet device comprises a cavity body, an outlet, a water inlet and a water outlet, the cavity body is a circle of through space surrounding the inner wall of the shell, only one outlet is arranged, and the water inlet and the water outlet are respectively arranged at two ends of the outlet; the inner wall of the shell of the soft start permanent magnet device is provided with two cooling medium cavities side by side, one cooling medium cavity is arranged on the peripheries of the disk surface A and the conductor disk A, and the other cooling medium cavity is arranged on the peripheries of the disk surface B and the conductor disk B.

Optimally, the cooling water jacket of the reduction gearbox comprises an upper water jacket and a lower water jacket, the upper water jacket and the lower water jacket are symmetrically arranged on two sides of the primary shaft barrel, the upper water jacket comprises a water inlet, a water outlet, a first inner cavity and a second inner cavity, the first inner cavity and the second inner cavity are arranged on the outer side of the primary shaft barrel side by side, one end of the outer wall of the first inner cavity is provided with the water inlet, one end of the outer wall of the second inner cavity is provided with the water outlet, the first inner cavity is communicated with the second inner cavity, and the lower water jacket is; the box body with the cooling water jackets of the reduction gearbox comprises at least two cooling water jackets, the upper water jackets and the upper water jackets are communicated with each other between the adjacent cooling water jackets, and the lower water jackets are communicated with each other between the adjacent cooling water jackets.

Preferably, the side wall of the gear box of the chain tightener is provided with a limit pin for preventing the handle from moving, and when the handle rotates to a preset position, the side wall of the gear box is inserted into the limit pin to prevent the idle wheel from moving; and the handle of the chain tightener is in threaded connection with the connecting rod so as to be convenient to disassemble.

The intelligent oil level sensor comprises a sensor module, a display module, a judgment module and an alarm module, wherein the sensor module comprises a water pressure sensor A, a temperature sensor B, a vibration sensor B, a water pressure sensor C, a temperature sensor C, an oil level sensor D and a temperature sensor D; a water pressure sensor A and a temperature sensor A are arranged in a cooling medium cavity of the soft start permanent magnet device, the water pressure sensor A monitors the water pressure of cooling water in the cooling medium cavity, and the temperature sensor A monitors the water temperature of the cooling water in the cooling medium cavity; a temperature sensor B and a vibration sensor B are mounted on one side, close to the input shaft A, of a primary shaft barrel of the reduction gearbox, the temperature sensor B monitors the bearing temperature of the input shaft A, and the vibration sensor B monitors the vibration displacement or vibration amplitude of the input shaft A; a water pressure sensor C and a temperature sensor C are arranged in a cooling water jacket of the reduction gearbox, the water pressure sensor C monitors the water pressure of cooling water in the cooling water jacket, and the temperature sensor C monitors the water temperature of the cooling water in the cooling water jacket; an oil level sensor D and a temperature sensor D are arranged in an integral three-stage conical cylindrical planetary gear reducer of the reduction gearbox, the oil level sensor D monitors the oil level height of bearing lubricating oil in the integral three-stage conical cylindrical planetary gear reducer, the temperature sensor D monitors the oil temperature of the bearing lubricating oil in the integral three-stage conical cylindrical planetary gear reducer, a sensor module, a display module, a judgment module and an alarm module are electrically connected, the sensor module acquires numerical information, the collected numerical information is sent to a display module, the display module displays the numerical information, a judgment module judges whether the collected numerical information corresponds to preset numerical information according to the numerical information collected by the sensor module, and when the judgment module judges that the collected numerical information does not correspond to the preset numerical information, the judgment module outputs a first control signal to the alarm module, and the alarm module sends prestored alarm information to the display module after corresponding to the first control signal.

According to the technical scheme, the flexible starting intelligent transmission system for the coal mine scraper conveyor is characterized in that the permanent magnet device is arranged between a motor of the scraper conveyor and a speed reducer, the input end of the permanent magnet device is connected with the output shaft of the motor, the output end of the permanent magnet device is connected with the input end of the speed reducer, the motor drives the conductor disc to cut magnetic lines of force in a strong magnetic field generated by the permanent magnet disc when the scraper conveyor is started, eddy current is generated in the conductor disc, the eddy current generates an induced magnetic field around the conductor disc, the relative movement of the conductor disc and the permanent magnet disc is prevented, and therefore torque transmission between the motor and the speed reducer is achieved. When the soft start is carried out, the soft start is realized by prolonging the time of the rotating speed balance of the conductor disc and the permanent magnet disc; when the load of the scraper conveyor reaches the protection torque value set by the permanent magnet device, the rotating speed of the permanent magnet disc is reduced to realize overload protection, so that the equipment is prevented from being damaged by overload. The cooling system of the input shaft of the speed reducer and the box body are integrally designed, and the cooling water jacket on the box body directly cools the outer ring of the bearing, so that the structure is compact, and the cooling effect is better.

Drawings

FIG. 1 is a cross-sectional view of a flexible start intelligent transmission system for a coal mine scraper conveyor.

FIG. 2 is a cross-sectional view of a soft start permanent magnet device of a flexible start intelligent transmission system for a coal mine scraper conveyor.

Fig. 3 is a partially enlarged view of fig. 2.

FIG. 4 is a cross-sectional view of a chain tensioner for a flexible start intelligent drive system for a coal mine face conveyor.

FIG. 5 is a side view of a chain tensioner for a flexible start intelligent drive system for a coal mine face conveyor.

FIG. 6 is a cross-sectional view of a reduction gearbox of a flexible start intelligent transmission system for a coal mine scraper conveyor.

Fig. 7 is a schematic structural diagram of a box body with a cooling water jacket of a novel flexible start intelligent speed reducer reduction box for the scraper conveyor 20.

FIG. 8 is a schematic structural diagram of another angle of a box body with a cooling water jacket of a reduction gearbox of a flexible start intelligent transmission system for a coal mine scraper conveyor.

FIG. 9 is a sectional view of a cooling water jacket of a box body with the cooling water jacket of a reduction gearbox of a flexible start intelligent transmission system for a coal mine scraper conveyor.

In the figure: the soft-start permanent magnet device 10, a shell 11, an end cover 12, a cooling medium cavity 13, an input shaft 14, a conductor disc bracket 15, a disc surface A150, a closed ring 151, a disc surface B152, a bearing disc 16, a conductor disc 17, a conductor disc A170, a conductor disc B171, a permanent magnet disc 18, a permanent magnet disc A180, a permanent magnet disc B181, a transmission shaft 19, a chain tightener 20, a gear box 21, a pin rod 210, a limit pin 211, a hydraulic motor 22, a driving gear 23, an idler gear 24, a connecting rod 25, a handle 26, a chain tightening gear 27, a reduction box 30, an end cover A31, a box body 32 with a cooling water jacket, an outer shell 320, a cooling water jacket 321, an upper water jacket 3210, a water inlet 32101, a water outlet 32102, a first inner cavity 32103, a second inner cavity 32104, a lower water jacket 3211, a first-stage shaft cylinder 322, a second-stage shaft cylinder 324, a fourth-stage shaft cylinder 325, an end cover B33, a three-stage cylindrical, Primary bevel gear 3402, second stage shaft system 341, secondary shaft 3411, secondary bevel gear 3412, secondary spur gear 3413, tertiary shaft system 342, tertiary shaft 3421, tertiary spur gear 3422, tertiary internal gear 3423, quaternary shaft system 343, quaternary shaft 3431, sun gear 3432, quaternary external gear 3433, quaternary planetary gear 3434, peripheral fixed gear 3435, and output shaft 3436.

Detailed Description

The technical scheme of the embodiment of the invention is further elaborated by combining the attached drawings of the invention.

Referring to the attached drawing 1, the flexible start intelligent transmission system for the coal mine scraper conveyor comprises a soft start permanent magnet device 10, a chain tightener 20, a reduction gearbox 30 and an intelligent control system, wherein an input shaft 14 of the soft start permanent magnet device 10 is sleeved on an input shaft of a scraper conveyor motor, the input shaft of the scraper conveyor motor is in splined connection with the input shaft 14 of the soft start permanent magnet device 10, the input shaft 14 of the soft start permanent magnet device 10 is sleeved on an input shaft A3401 connected with the reduction gearbox 30, a transmission shaft 19 of the soft start permanent magnet device 10 is in splined connection with an input shaft A3401 connected with the reduction gearbox 30, the chain tightener 20 is sleeved on a transmission shaft 19 of the soft start permanent magnet device 10, and the chain tightener 20 is in splined connection with the transmission shaft 19 of the soft start permanent magnet device 10.

Referring to fig. 2, the soft start permanent magnet device 10 includes a housing 11, an end cover 12, a cooling medium cavity 13, an input shaft 14, a conductor disc support 15, a bearing disc 16, a conductor disc 17, a permanent magnet disc 18, and a transmission shaft 19. The conductor disc 17 comprises a conductor disc A170 and a conductor disc B171, the permanent magnet disc 18 comprises a permanent magnet disc A180 and a permanent magnet disc B181, the shell 11 is wrapped at the outermost periphery, the inner wall of the shell 11 is provided with a cooling medium cavity 13, one end opening of the shell 11 is sealed by a disc-shaped end cover 12, the A end of the input shaft 14 penetrates through the end cover 12, the A end of the input shaft 14 is connected with the end cover 12 in a shaft mode, the B end of the input shaft 14 is sleeved outside one end of the transmission shaft 19, the B end of the input shaft 14 is connected with the transmission shaft 19 in a bearing mode, the rotating shaft penetrates through the permanent magnet disc A180 and the permanent magnet disc B181, the permanent magnet disc A180 and the permanent magnet disc B181 are both sleeved and fixed on the transmission shaft 19, the bearing disc 16 is sleeved outside the other end of the transmission shaft 19, the transmission shaft 19 is connected with the bearing disc 16 in a bearing mode, one branch of the other end of the shell 11 is bent inwards and then, The electromagnetic induction type conductor disc comprises a closed ring 151 and a disc surface B152, wherein one end of the cylindrical annular closed ring 151 is fixedly connected with an annular disc surface A150 in an opening mode, the opening of the other end of the closed ring 151 is fixedly connected with the annular disc surface B152 in an opening mode, a conductor disc A170 is fixedly installed on the inner wall of the disc surface A150, a permanent magnet disc A180 is arranged on the other side of the conductor disc A170, a conductor disc B171 is fixedly installed on the inner wall of the disc body B, a permanent magnet disc B181 is arranged on the other side of the conductor disc B171, the disc surface A150 is fixedly installed on the outer side of the end B of an input shaft 14 in a sleeved mode, the disc surface B152 is fixedly connected with one end of a bearing disc 16, the input shaft 14 drives a conductor disc support 15 to rotate. The cooling medium cavities 13 comprise cavities, outlets, water inlets 32101 and water outlets 32102, the cavities are through spaces which surround the inner wall of the shell 11 in a circle and only have one outlet, the two ends of the outlet are respectively provided with the water inlets 32101 and the water outlets 32102, the inner wall of the shell 11 of the soft start permanent magnet device 10 is provided with two cooling medium cavities 13 side by side, one is arranged on the peripheries of the disk surface A150 and the conductor disk A170, and the other is arranged on the peripheries of the disk surface B152 and the conductor disk B171.

The reduction gearbox 30 comprises an end cover A31, a box body 32 with a cooling water jacket, an end cover B33 and an integral three-stage conical cylindrical planetary gear reducer 34, referring to the attached drawings 7 and 8, the box body 32 with the cooling water jacket comprises an outer shell 320, the cooling water jacket 321, a first-stage shaft cylinder 322, a second-stage shaft cylinder 323, a third-stage shaft cylinder 324 and a fourth-stage shaft cylinder 325, the first-stage shaft cylinder 322 is arranged on the side surface of the outer shell 320, the cooling water jacket 321 is arranged on the periphery of the first-stage shaft cylinder 322, an opening on the upper portion of the outer shell 320 is fixedly connected with the end cover A31, the second-stage shaft cylinder 323 is arranged on one side of the lower portion of the outer shell 320 close to the first-stage shaft cylinder 322, the fourth-stage shaft cylinder 325 is arranged on the lower portion of the outer shell 320 in parallel to the second-stage shaft cylinder 323, the third-stage shaft cylinder 324 concentric with the fourth-stage shaft cylinder 325 is arranged on, the cooling water jacket 321 comprises an upper water jacket 3210 and a lower water jacket 3211, the upper water jacket 3210 and the lower water jacket 3211 are symmetrically arranged on two sides of the primary shaft cylinder 322, the upper water jacket 3210 comprises a water inlet 32101, a water outlet 32102, a first inner cavity 32103 and a second inner cavity 32104, the first inner cavity 32103 and the second inner cavity 32104 are arranged side by side outside the primary shaft cylinder 322, one end of the outer wall of the first inner cavity 32103 is provided with the water inlet 32101, one end of the outer wall of the second inner cavity 32104 is provided with the water outlet 32102, the first inner cavity 32103 is communicated with the second inner cavity 32104, and the lower water jacket 3211 is identical to the upper water jacket; the box body 32 with the cooling water jackets of the reduction gearbox 30 comprises at least two cooling water jackets 321, an upper water jacket 3210 and an upper water jacket 3210 between adjacent cooling water jackets 321 are communicated with each other, and a lower water jacket 3211 between adjacent cooling water jackets 321 are communicated with each other.

Referring to fig. 6, the integrated three-stage conical-cylindrical planetary gear reducer 34 is disposed in the case 32 with the cooling water jacket, the integrated three-stage conical-cylindrical planetary gear reducer 34 includes a first-stage shaft system 340, a second-stage shaft system 341, a third-stage shaft system 342, and a fourth-stage shaft system 343, the first-stage shaft system 340 includes an input shaft a3401 and a first-stage conical gear 3402, the second-stage shaft system 341 includes a second-stage shaft 3411, a second-stage conical gear 3412, and a second-stage cylindrical gear 3413, the third-stage shaft system 342 includes a third-stage shaft 3421, a third-stage cylindrical gear 3422, and a third-stage internal gear 3423, and the fourth-stage shaft system 343 includes a fourth-stage shaft 3431, a sun gear 3432, a fourth-stage external gear 3433, a fourth-stage; an input shaft A3401 is fixed in a first-stage shaft barrel 322 in a bearing mode, one end of the input shaft A3401 is a free end extending out of a box body, a first-stage conical gear 3402 is arranged on the periphery of the other end of the input shaft A3401, an upper end bearing of a second-stage shaft 3411 is fixed on an end cover A31, a lower end bearing of the second-stage shaft 3411 is fixed on a second-stage shaft barrel 323, a second-stage cylindrical gear 3413 and a second-stage conical gear 3412 are arranged in the middle of the second-stage shaft 3411, the second-stage conical gear 3412 is meshed with the first-stage conical gear 3402, the number of teeth of the second-stage conical gear 3412 is larger than that of the first-stage conical gear 3412, a third-stage shaft 3421 and the second-stage shaft are arranged on an end cover A31 in parallel, a lower end bearing of the third-stage shaft 3421 is fixed on a third-stage shaft barrel 324, an upper end bearing of the third-stage shaft 3421 is fixed on an end cover, a third-stage internal gear 3423 is disposed at the lower end of the third-stage shaft 3421, the fourth-stage shaft 3431 is coaxial with the third-stage shaft 3421, a sun gear 3432 is disposed at one end of the fourth-stage shaft 3431, the sun gear 3432 is engaged with the third-stage internal gear 3423, a fourth-stage external gear 3433 is disposed at the middle part of the fourth-stage shaft 3431, a fourth-stage planetary gear 3434 is disposed at the periphery of the fourth-stage shaft 3431, peripheral fixed teeth 3435 are fixed on a cylinder 325 of the fourth-stage shaft 3431 at the periphery of the fourth-stage planetary gear 3434, an output shaft 3436 is disposed at the lower part of the fourth-stage planetary gear 3434, the output shaft 3436 is fixed on an end cap B33 by a bearing, the fourth-stage planetary gear 3434 is engaged with the fourth-stage external gear 3433, the fourth-stage planetary gear 3434.

Referring to fig. 4 and 5, the chain tensioner 20 includes a gear box 21, a hydraulic motor 22, a driving gear 23, an idler gear 24, a connecting rod 25, a handle 26, and a chain tightening gear 27, wherein the driving gear 23, the idler gear 24, the connecting rod 25, and the chain tightening gear 27 are disposed in the gear box 21, the gear box 21 is flange-connected to the housing of the soft start permanent magnet device 10, a driving shaft of the hydraulic motor 22 passes through a side wall of the gear box 21 and is fixedly connected to a rotating shaft of the driving gear 23, the driving gear 23 is engaged with the idler gear 24, a through hole is disposed in a center of the idler gear 24, a first end of the connecting rod 25 is sleeved in the through hole of the idler gear 24, the connecting rod 25 is L-shaped, a through hole is disposed at a corner of the connecting rod 25, and correspondingly, a pin 210 matched with the through hole of the connecting rod 25 is disposed on the side, the second end and the handle 26 fixed connection of connecting rod 25, when turning handle 26, idler 24 rotates along with connecting rod 25 and meshes or breaks away from with tight sprocket 27 gradually, tight sprocket 27's pivot suit is on soft start permanent magnet device 10's transmission shaft 19, tight sprocket 27's pivot and soft start permanent magnet device 10's transmission shaft 19 splined connection, hydraulic motor 22 provides power and drives tight sprocket 27 and soft start permanent magnet device 10's transmission shaft 19 and rotates to the drive scraper chain. The gear case 21 of the chain tensioner 20 is provided at a side wall thereof with a stopper pin 211 for preventing the movement of the handle 26, and when the handle 26 is rotated to a predetermined position, the side wall of the gear case 21 is inserted into the stopper pin 211 to prevent the movement of the idler pulley 24. The handle 26 of the chain tensioner 20 is screwed to the connecting rod 25 for easy removal.

The intelligent control system comprises a sensor module, a display module, a judgment module and an alarm module, wherein the sensor module comprises a water pressure sensor A, a temperature sensor B, a vibration sensor B, a water pressure sensor C, a temperature sensor C, an oil level sensor D and a temperature sensor D; a water pressure sensor A and a temperature sensor A are arranged in a cooling medium cavity of the soft start permanent magnet device, the water pressure sensor A monitors the water pressure of cooling water in the cooling medium cavity, and the temperature sensor A monitors the water temperature of the cooling water in the cooling medium cavity; a temperature sensor B and a vibration sensor B are mounted on one side, close to the input shaft A, of a primary shaft barrel of the reduction gearbox, the temperature sensor B monitors the bearing temperature of the input shaft A, and the vibration sensor B monitors the vibration displacement or vibration amplitude of the input shaft A; a water pressure sensor C and a temperature sensor C are arranged in a cooling water jacket of the reduction gearbox, the water pressure sensor C monitors the water pressure of cooling water in the cooling water jacket, and the temperature sensor C monitors the water temperature of the cooling water in the cooling water jacket; an oil level sensor D and a temperature sensor D are arranged in an integral three-stage conical cylindrical planetary gear reducer of the reduction gearbox, the oil level sensor D monitors the oil level height of bearing lubricating oil in the integral three-stage conical cylindrical planetary gear reducer, the temperature sensor D monitors the oil temperature of the bearing lubricating oil in the integral three-stage conical cylindrical planetary gear reducer, a sensor module, a display module, a judgment module and an alarm module are electrically connected, the sensor module acquires numerical information, the collected numerical information is sent to a display module, the display module displays the numerical information, a judgment module judges whether the collected numerical information corresponds to preset numerical information according to the numerical information collected by the sensor module, and when the judgment module judges that the collected numerical information does not correspond to the preset numerical information, the judgment module outputs a first control signal to the alarm module, and the alarm module sends prestored alarm information to the display module after corresponding to the first control signal.

The invention provides a flexible starting intelligent transmission system for a coal mine scraper conveyor, wherein a permanent magnet device is arranged between a motor of the scraper conveyor and a speed reducer, the input end of the permanent magnet device is connected with the output shaft of the motor, the output end of the permanent magnet device is connected with the input end of the speed reducer, when the scraper conveyor is started, the motor drives a conductor disc 17 to cut magnetic lines of force in a strong magnetic field generated by a permanent magnet disc 18, eddy current is generated in the conductor disc 17, the eddy current generates an induction field around the conductor disc 17, and the relative movement of the conductor disc 17 and the permanent magnet disc 18 is prevented, so that the torque transmission between the motor and the speed reducer is. When the soft start is carried out, the soft start is realized by prolonging the time of the rotating speed balance of the conductor disc 17 and the permanent magnet disc 18; when the load of the scraper conveyor reaches the protection torque value set by the permanent magnet device, the rotating speed of the permanent magnet disc 18 is reduced to realize overload protection, so that the equipment is prevented from being damaged by overload. The cooling system of the input shaft A3401 of the speed reducer and the box body are integrally designed, and the cooling water jacket 321 on the box body directly cools the outer ring of the bearing, so that the structure is compact, and the cooling effect is better. The chain tensioner 20 connects or disconnects the idler gear 24 to or from the chain tensioner gear 27 through the cooperation of the handle 26 and the connecting rod 25. The pin 210 on the side wall of the gear box 21 can be used as a fulcrum of the L-shaped connecting rod 25, and the handle 26 is relatively labor-saving to rotate. Meanwhile, the chain tightener 20 is in splined connection with the transmission shaft 19 of the soft start permanent magnet device 10, and the speed of the scraper chain is reduced by using the reduction box 30.

Claims

1. A flexible start intelligent transmission system for a coal mine scraper conveyor comprises a soft start permanent magnet device, a chain tightener and a reduction box, wherein an input shaft of the soft start permanent magnet device is sleeved on an input shaft of a scraper conveyor motor, the input shaft of the scraper conveyor motor is in splined connection with the input shaft of the soft start permanent magnet device, the input shaft of the soft start permanent magnet device is sleeved on the input shaft connected with the reduction box, a transmission shaft of the soft start permanent magnet device is in splined connection with the input shaft connected with the reduction box, the chain tightener is sleeved on the transmission shaft of the soft start permanent magnet device, and the chain tightener is in splined connection with the transmission shaft of the soft start permanent magnet device; the method is characterized in that: the soft start permanent magnet device comprises a shell, an end cover, a cooling medium cavity, an input shaft, a conductor disc bracket, a bearing disc, a conductor disc, a permanent magnet disc and a transmission shaft, wherein the conductor disc comprises a conductor disc A and a conductor disc B, the permanent magnet disc comprises the permanent magnet disc A and the permanent magnet disc B, the shell is wrapped at the outermost periphery, the inner wall of the shell is provided with the cooling medium cavity, one end opening of the shell is sealed by a disc-shaped end cover, the A end of the input shaft penetrates through the end cover, the A end of the input shaft is connected with the end cover shaft, the B end of the input shaft is sleeved outside one end of the transmission shaft, the B end of the input shaft is connected with a transmission shaft bearing, a rotating shaft penetrates through the permanent magnet disc A and the permanent magnet disc B, the permanent magnet disc A and the permanent magnet disc B are both sleeved and fixed on the transmission shaft, the bearing disc is sleeved outside the other end of the transmission shaft, the transmission shaft is connected, the conductor disc support comprises a disc surface A, a closed ring and a disc surface B, wherein an opening at one end of the cylindrical annular closed ring is fixedly connected with the annular disc surface A, an opening at the other end of the closed ring is fixedly connected with the annular disc surface B, a conductor disc A is fixedly installed on the inner wall of the disc surface A, a permanent magnet disc A is arranged on the other side of the conductor disc A, a conductor disc B is fixedly installed on the inner wall of the disc body B, a permanent magnet disc B is arranged on the other side of the conductor disc B, the disc surface A is sleeved and fixed on the outer side of the end B of the input shaft, the disc surface B is fixedly connected with one end of the bearing disc, the input shaft drives the conductor disc support to rotate, and the rotating conductor disc support drives a transmission shaft provided; the reduction gearbox comprises an end cover A, a box body with a cooling water jacket, an end cover B and an integral three-level conical cylindrical planetary gear reducer, wherein the box body with the cooling water jacket comprises an outer shell, the cooling water jacket, a first-level shaft cylinder, a second-level shaft cylinder, a third-level shaft cylinder and a fourth-level shaft cylinder, the side surface of the outer shell is provided with the first-level shaft cylinder, the periphery of the first-level shaft cylinder is provided with the cooling water jacket, an opening at the upper part of the outer shell is fixedly connected with the end cover A, the lower part of the outer shell is provided with the second-level shaft cylinder at one side close to the first-level shaft cylinder, the fourth-level shaft cylinder is arranged at the lower part of the outer shell side by side, the third-level shaft cylinder which is concentric with the fourth-level shaft cylinder is arranged at one side close to the inner cavity of the outer, the integral three-level conical cylindrical planetary gear reducer comprises a first-level shaft system, a second-level shaft system, a third-level shaft system and a fourth-level shaft system, wherein the first-level shaft system comprises an input shaft and a first-level conical gear, the second-level shaft system comprises a second-level shaft, a second-level conical gear and a second-level cylindrical gear, the third-level shaft system comprises a third-level shaft, a third-level cylindrical gear and a third-level internal gear, and the fourth-level shaft system comprises a fourth-level shaft, a sun gear, a fourth-level external gear, a fourth-level planetary gear, peripheral fixed; an input shaft bearing is fixed in a first-stage shaft barrel, one end of the input shaft is a free end extending out of a box body, a first-stage conical gear is arranged on the periphery of the other end of the input shaft, an upper end bearing of a second-stage shaft is fixed on an end cover A, a lower end bearing of the second-stage shaft is fixed on a second-stage shaft barrel, a second-stage cylindrical gear and a second-stage conical gear are arranged in the middle of the second-stage shaft, the second-stage conical gear is meshed with the first-stage conical gear, the number of teeth of the second-stage conical gear is larger than that of the first-stage conical gear, the third-stage shaft and the second-stage shaft are arranged on the end cover A in parallel, a lower end bearing of the third-stage shaft is fixed on the end cover A, a third-stage cylindrical gear is arranged on the third-stage shaft, the third, a sun gear is arranged at one end of the four-stage shaft and meshed with the three-stage internal gear, a four-stage external gear is arranged in the middle of the four-stage shaft, a four-stage planetary gear is arranged on the periphery of the four-stage shaft, peripheral fixed teeth are fixed on a four-stage shaft cylinder on the periphery of the four-stage planetary gear, an output shaft is arranged at the lower part of the four-stage planetary gear, an output shaft bearing is fixed on an end cover B, the four-stage planetary gear is meshed with the four-stage external gear, and meanwhile, the four-stage planetary gear is meshed with the peripheral fixed teeth, and the four-; the chain tightener comprises a gear box, a hydraulic motor, a driving gear, an idler, a connecting rod, a handle and a chain tightening gear, wherein the driving gear, the idler, the connecting rod and the chain tightening gear are arranged in the gear box, the gear box is connected with a shell of the soft start permanent magnet device through a flange, a driving shaft of the hydraulic motor penetrates through the side wall of the gear box and is fixedly connected with a rotating shaft of the driving gear, the driving gear is meshed with the idler, a through hole is formed in the center of the idler, a first end of the connecting rod is sleeved in the through hole of the idler, the connecting rod is L-shaped, a through hole is formed in the corner of the connecting rod and corresponds to the through hole, a pin rod matched with the through hole of the connecting rod is arranged on the side wall of the gear box, so that the connecting rod is sleeved on the pin rod and can rotate around the pin rod, the rotating shaft of the chain tightening gear is sleeved on the transmission shaft of the soft start permanent magnet device, the rotating shaft of the chain tightening gear is in splined connection with the transmission shaft of the soft start permanent magnet device, and the hydraulic motor provides power to drive the chain tightening gear and the transmission shaft of the soft start permanent magnet device to rotate, so that the scraper chain is driven.

2. The flexible start intelligent transmission system for the coal mine scraper conveyor as claimed in claim 1, wherein: the cooling medium cavity of the soft start permanent magnet device comprises a cavity body, an outlet, a water inlet and a water outlet, the cavity body is a circle of through space surrounding the inner wall of the shell, only one outlet is arranged, and the water inlet and the water outlet are respectively arranged at two ends of the outlet; the inner wall of the shell of the soft start permanent magnet device is provided with two cooling medium cavities side by side, one cooling medium cavity is arranged on the peripheries of the disk surface A and the conductor disk A, and the other cooling medium cavity is arranged on the peripheries of the disk surface B and the conductor disk B.

3. The flexible start intelligent transmission system for the coal mine scraper conveyor as claimed in claim 2, wherein: the cooling water jacket of the reduction gearbox comprises an upper water jacket and a lower water jacket, the upper water jacket and the lower water jacket are symmetrically arranged on two sides of the primary shaft barrel, the upper water jacket comprises a water inlet, a water outlet, a first inner cavity and a second inner cavity, the first inner cavity and the second inner cavity are arranged on the outer side of the primary shaft barrel in parallel, one end of the outer wall of the first inner cavity is provided with the water inlet, one end of the outer wall of the second inner cavity is provided with the water outlet, the first inner cavity is communicated with the second inner cavity, and the lower water jacket is; the box body with the cooling water jackets of the reduction gearbox comprises at least two cooling water jackets, the upper water jackets and the upper water jackets are communicated with each other between the adjacent cooling water jackets, and the lower water jackets are communicated with each other between the adjacent cooling water jackets.

4. The flexible start intelligent transmission system for the coal mine scraper conveyor as claimed in claim 3, wherein: a limit pin for preventing the handle from moving is arranged on the side wall of the gear box of the chain tightener, and when the handle rotates to a preset position, the side wall of the gear box is inserted into the limit pin to prevent the idle wheel from moving; and the handle of the chain tightener is in threaded connection with the connecting rod so as to be convenient to disassemble.

5. The flexible start intelligent transmission system for the coal mine scraper conveyor as claimed in claim 4, wherein: the intelligent control system comprises a sensor module, a display module, a judgment module and an alarm module, wherein the sensor module comprises a water pressure sensor A, a temperature sensor B, a vibration sensor B, a water pressure sensor C, a temperature sensor C, an oil level sensor D and a temperature sensor D; a water pressure sensor A and a temperature sensor A are arranged in a cooling medium cavity of the soft start permanent magnet device, the water pressure sensor A monitors the water pressure of cooling water in the cooling medium cavity, and the temperature sensor A monitors the water temperature of the cooling water in the cooling medium cavity; a temperature sensor B and a vibration sensor B are mounted on one side, close to the input shaft A, of a primary shaft barrel of the reduction gearbox, the temperature sensor B monitors the bearing temperature of the input shaft A, and the vibration sensor B monitors the vibration displacement or vibration amplitude of the input shaft A; a water pressure sensor C and a temperature sensor C are arranged in a cooling water jacket of the reduction gearbox, the water pressure sensor C monitors the water pressure of cooling water in the cooling water jacket, and the temperature sensor C monitors the water temperature of the cooling water in the cooling water jacket; an oil level sensor D and a temperature sensor D are arranged in an integral three-stage conical cylindrical planetary gear reducer of the reduction gearbox, the oil level sensor D monitors the oil level height of bearing lubricating oil in the integral three-stage conical cylindrical planetary gear reducer, the temperature sensor D monitors the oil temperature of the bearing lubricating oil in the integral three-stage conical cylindrical planetary gear reducer, a sensor module, a display module, a judgment module and an alarm module are electrically connected, the sensor module acquires numerical information, the collected numerical information is sent to a display module, the display module displays the numerical information, a judgment module judges whether the collected numerical information corresponds to preset numerical information according to the numerical information collected by the sensor module, and when the judgment module judges that the collected numerical information does not correspond to the preset numerical information, the judgment module outputs a first control signal to the alarm module, and the alarm module sends prestored alarm information to the display module after corresponding to the first control signal.