Scraper reclaimer driving device adopting CST system

Abstract

The utility model discloses a scraper reclaimer driving device adopting a CST system, which comprises a chain wheel, a transmission shaft, a Hall sensing unit, the CST system and a motor, an output shaft of the motor is fixedly connected with an input shaft of the CST system, an output shaft of the CST system is fixedly connected with the transmission shaft, the transmission shaft is in interference connection with the chain wheel, and the Hall sensing unit is connected with the transmission shaft. The Hall sensing unit is fixed to the transmission shaft and electrically connected with the CST system, the problem of on-load starting and braking of the scraper reclaimer is solved, a chain and a motor of the reclaimer are protected, and the use stability of the reclaimer is improved.

Description

Technical Field

[0001] The utility model belongs to the bulk material transportation industry, and particularly relates to a scraper reclaimer drive device adopting a CST system. Background Art

[0002] Scraper reclaimers are widely used in bulk material transportation industries such as coal, chemical industry, metallurgy, and electric power. Scraper reclaimers often need to start and brake with load, and have high requirements for torque. And during the process of the scraper scraping materials, due to the differences in the particle size, humidity, and homogenization degree of the materials, an oscillating torque is generated on the chain by the scraper. If its instantaneous torque exceeds the allowable value, the chain will be damaged or even destroyed. Traditional variable frequency speed regulation will reduce the input voltage of the motor during low-frequency startup, resulting in a reduction in the output torque of the motor. Moreover, the variable frequency speed regulation is installed on the high-speed shaft side of the reducer. If there is an overload, it cannot immediately provide protection for the chain and the motor. Therefore, it is not suitable for large-scale scraper devices. Content of the Utility Model

[0003] To solve the above technical problems, the utility model provides a scraper reclaimer drive device adopting a CST system.

[0004] The specific scheme is as follows:

[0005] A scraper reclaimer drive device adopting a CST system includes a sprocket, a transmission shaft, a Hall sensing unit, a CST system, and a motor. The output shaft of the motor is fixedly connected to the input shaft of the CST system. The output shaft of the CST system is fixedly connected to the transmission shaft. The transmission shaft is in interference connection with the sprocket. The Hall sensing unit is fixed on the transmission shaft and is electrically connected to the CST system.

[0006] The Hall sensing unit includes a turntable and a Hall sensor. The turntable is sleeved on the transmission shaft, and a magnet is fixedly arranged on the turntable. The magnet is in non-contact connection with the Hall sensor, and the Hall sensor is electrically connected to the CST system.

[0007] The CST system includes a PLC control system. A PID controller is arranged in the PLC control system. The Hall sensor is electrically connected to the PID controller.

[0008] The CST system further includes an electro-hydraulic servo system, a planetary gear mechanism, and a reduction drive system. The input shaft of the CST system drives the planetary gear mechanism to rotate through the reduction drive system. The planetary gear mechanism drives the sprocket to rotate through the output shaft of the CST system. The PID controller is electrically connected to the electro-hydraulic servo system, and the electro-hydraulic servo system adjusts the rotation of the planetary gear mechanism.

[0009] The reduction drive system includes a reduction drive gear, a reduction driven gear, and an intermediate transmission shaft. The reduction drive gear is sleeved on the input shaft of the CST system. The reduction driven gear is sleeved on the intermediate transmission shaft. The reduction drive gear and the reduction driven gear are meshed and connected. Bearings are also provided at both ends of the intermediate transmission shaft and both ends of the input shaft of the CST system. The intermediate transmission shaft and the input shaft of the CST system rotate within the CST system through the bearings. The intermediate transmission shaft drives the planetary gear mechanism to rotate.

[0010] The planetary gear mechanism includes a sun gear, planetary gears, a planet carrier, and a ring gear. The sun gear is sleeved on the intermediate transmission shaft. The sun gear and the planetary gears are both located within the ring gear, and the sun gear is located at the center of the ring gear. A planet carrier is fixed on the planetary gears. The planet carrier drives the output shaft of the CST system to rotate. One end of the planetary gear is meshed with the sun gear, and the other end of the planetary gear is meshed with the ring gear. The ring gear is connected to the electro-hydraulic servo system.

[0011] The electro-hydraulic servo system includes a hydraulic sensor, an electro-hydraulic servo valve, and a wet clutch. The wet clutch includes a dynamic friction plate, a static friction plate, and a hydraulic cylinder. External teeth are provided on the dynamic friction plate. The dynamic friction plate is embedded in the internal teeth of the ring gear through the external teeth. The dynamic friction plate is fixed on the clutch seat. The clutch seat is fixedly connected to the piston rod of the hydraulic cylinder. The hydraulic cylinder is connected to the electro-hydraulic servo valve through a pipeline. The electro-hydraulic servo valve is connected to the hydraulic sensor through a pipeline. The hydraulic sensor is electrically connected to the PID controller.

[0012] A first elastic jaw coupling is provided on the output shaft of the motor. The output shaft of the motor is connected to the input shaft of the CST system through the first elastic jaw coupling. A second elastic jaw coupling is provided on the output shaft of the CST system. The output shaft of the CST system is connected to the transmission shaft through the second elastic jaw coupling.

[0013] There are two sprockets. The interval between the two sprockets on the transmission shaft is the size of the scraper. Chains are provided on each sprocket. The chains are meshed and connected with the sprockets.

[0014] Bearing platforms and bearing seats are also provided at both ends of the transmission shaft. Both ends of the transmission shaft are fixedly connected to the bearing platforms through the bearing seats.

[0015] A driving device for a scraper reclaimer using a CST system applies the CST system to the driving of the scraper reclaimer. The transmission shaft drives the sprocket on the shaft to rotate. The sprocket meshes with the chain to drive the scraper to move and complete the reclaimer work. A Hall sensor is provided on the transmission shaft to measure the rotational speed of the transmission shaft. The Hall sensor is connected to the PLC control system of the CST and feeds back the signal to the CST control system. After receiving the feedback signal, the PLC control system of the CST is connected to the drive feedback device of the CST through a hard-wired connection with the aid of a PID controller loop, thereby realizing the control of the CST reduction drive system and ultimately the control of the transmission shaft.

[0016] After adopting this technical solution, the rotational speed of the transmission shaft can be set in the CST system. Through the closed-loop feedback system in the CST system, the control of the output torque of the scraper reclaimer is realized, solving the requirement for large torque of large scraper reclaimers and improving the reliability and stability of the equipment. Brief Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0018] Figure 2 It is a schematic diagram of the structure of the Hall sensing unit.

[0019] Figure 3 It is a PLC control and mechanical drive circuit diagram of the entire driving device of the scraper reclaimer.

[0020] Figure 4 It is a schematic diagram of the principle of the feedback actuator of the CST system.

[0021] Figure 5 It is a sectional view of the feedback actuator of the CST system.

[0022] Figure 6 It is a schematic diagram of the planetary gear mechanism.

[0023] Figure 7 It is a schematic diagram of the structure of the wet clutch.

[0024] Figure 8 It is a schematic diagram of the external tooth structure of the dynamic friction plate. Detailed Embodiment

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0026] AsFigure 1 As shown in the figure, a scraper reclaimer drive device adopting a CST system includes a sprocket 2, a transmission shaft 3, a Hall sensing unit 4, a CST system 8, and a motor 10. The output shaft of the motor 10 is fixedly connected to the input shaft 18 of the CST system. The output shaft 30 of the CST system is fixedly connected to the transmission shaft 3. The transmission shaft 3 is in interference connection with the sprocket 2. The Hall sensing unit 4 is fixed on the transmission shaft 3 and is electrically connected to the CST system 8.

[0027] As Figure 2 shown in the figure, the Hall sensing unit 4 includes a turntable 41 and a Hall sensor 42. The turntable 41 is sleeved on the transmission shaft 3, and a magnet 43 is fixedly arranged on the turntable 41. The magnet 43 is in non-contact connection with the Hall sensor 42. The Hall sensor 42 is electrically connected to the CST system 8. When the magnet 43 approaches the Hall sensor 42, the Hall sensor 42 generates a level signal. The level signal generated by the Hall sensor 42 is transmitted into the PLC control system through a cable for obtaining the real-time rotational speed of the transmission shaft 3.

[0028] The CST system 8 includes a PLC control system. A PID controller 11 is arranged in the PLC control system. The Hall sensor 42 is electrically connected to the PID controller 11.

[0029] As Figure 3 shown in the figure, the CST system 8 further includes an electro-hydraulic servo system 12, a planetary gear mechanism 16, and a reduction drive system 17. The input shaft 18 of the CST system drives the planetary gear mechanism 16 to rotate through the reduction drive system 17. The planetary gear mechanism 16 drives the sprocket 2 to rotate through the output shaft 30 of the CST system. The PID controller 11 is electrically connected to the electro-hydraulic servo system 12. The electro-hydraulic servo system 12 adjusts the rotation of the planetary gear mechanism 16.

[0030] As Figures 4 to 5 shown in the figure, the reduction drive system 17 includes a reduction drive gear 19, a reduction driven gear 22, and an intermediate transmission shaft 21. The reduction drive gear 19 is sleeved on the input shaft 18 of the CST system. The reduction driven gear 22 is sleeved on the intermediate transmission shaft 21. The reduction drive gear 19 and the reduction driven gear 22 are meshed and connected. Bearings 20 are also arranged at both ends of the intermediate transmission shaft 21 and both ends of the input shaft 18 of the CST system. The intermediate transmission shaft 21 and the input shaft 18 of the CST system both rotate in the CST system 8 through the bearings 20. The intermediate transmission shaft 21 drives the planetary gear mechanism 16 to rotate.

[0031] As Figures 4 to 6As shown, the planetary gear mechanism 16 includes a sun gear 23, planet gears 24, a planet carrier 25, and a ring gear 26. The sun gear 23 is sleeved on the intermediate transmission shaft 21. Both the sun gear 23 and the planet gears 24 are located within the ring gear 26, and the sun gear 23 is located at the center of the ring gear 26. A planet carrier 25 is fixed on the planet gears 24. The planet carrier 25 drives the output shaft 30 of the CST system to rotate. One end of the planet gears 24 is meshed and connected with the sun gear 23, and the other end of the planet gears 24 is meshed and connected with the ring gear 26. The ring gear 26 is connected with the electro-hydraulic servo system 12.

[0032] As Figures 4 to 8 shown, Figure 4 and Figure 7 the arrows in represent the flow direction of the hydraulic oil. The electro-hydraulic servo system 12 includes a hydraulic sensor 13, an electro-hydraulic servo valve 14, and a wet clutch 15. The wet clutch 15 includes a dynamic friction plate 27, a static friction plate 28, and a hydraulic cylinder 29. External teeth are provided on the dynamic friction plate 27. The dynamic friction plate 27 is embedded in the internal teeth of the ring gear 26 through the external teeth. The dynamic friction plate 27 is fixed on the clutch seat. The clutch seat is fixedly connected with the piston rod of the hydraulic cylinder 29. The hydraulic cylinder 29 is connected with the electro-hydraulic servo valve 14 through a pipeline. The electro-hydraulic servo valve 14 is connected with the hydraulic sensor 13 through a pipeline. The hydraulic sensor 13 is electrically connected with the PID controller 11.

[0033] As Figure 1 shown, a first elastic jaw coupling 9 is provided on the output shaft of the motor 10. The output shaft of the motor 10 is connected with the input shaft 18 of the CST system through the first elastic jaw coupling 9. A second elastic jaw coupling 7 is provided on the output shaft 30 of the CST system. The output shaft 30 of the CST system is connected with the transmission shaft 3 through the second elastic jaw coupling 7.

[0034] There are two sprockets 2. The interval between the two sprockets 2 on the transmission shaft 3 is the size of the scraper. A chain 1 is provided on each sprocket 2. The chain 1 is meshed and connected with the sprocket 2.

[0035] Bearing platforms 6 and bearing seats 5 are also provided at both ends of the transmission shaft 3. Both ends of the transmission shaft 3 are fixedly connected with the bearing platforms 6 through the bearing seats 5.

[0036] The specific working process of the scraper reclaimer drive device using the CST system is as follows:

[0037] As Figure 1As shown in the figure, the chain 1 meshes with the sprocket 2 for transmission. The sprocket is sleeved on the transmission shaft 3 by interference fit. The distance between the two sprockets is determined according to the size of the scraper. The bearing seats 5 are arranged on the two ends of the bearing platform 6. The transmission shaft 3 is respectively placed on the bearing platform 6 in cooperation with the bearing seats 5 on both sides. When the transmission shaft 3 rotates, it drives the sprocket 2 to rotate and work.

[0038] The Hall sensing unit 4 arranged on the transmission shaft 3 is used to detect the rotational speed of the transmission shaft 3 and feedback it to the PLC control system of the CST system 8. As Figure 2 shown in the figure, the Hall sensing unit 4 includes a turntable 41 and a Hall sensor. The turntable 41 is connected to the transmission shaft 3. When the transmission shaft 3 rotates, the turntable 41 rotates accordingly. The magnet 43 on the turntable 41 rotates with the turntable. The Hall sensor 42 fixed near the turntable 41 can generate a corresponding pulse when the small magnet passes by, and by detecting the number of pulses per unit time, the rotational speed of the measured object can be known.

[0039] The motor 10 works to drive the transmission shaft 3 to work. The input shaft 18 of the CST system and the output shaft 30 of the CST system are parallel. The feedback actuator of the CST system 8 includes a PLC control system, an electro-hydraulic servo system 12, a planetary gear mechanism 16 and a reduction drive system 17.

[0040] When the motor 10 starts and a predetermined rotational speed is set in the CST system, the Hall sensor on the transmission shaft 3 detects the actual rotational speed of the transmission shaft 3, compares the actual rotational speed with the set predetermined rotational speed, and feeds back the signal to the PLC control system of the CST system 8. The PLC control system calls the PID controller. Specifically, the signal is transmitted to the hydraulic cylinder 29 through the hydraulic sensor 12 and the hydraulic valve 14 in the electro-hydraulic servo. As the piston pressure in the hydraulic cylinder 29 continuously increases, the static friction plate 28 and the dynamic friction plate 27 in the wet clutch 15 are pressed tightly. Due to the pressing of the dynamic friction plate 27, the speed of the ring gear 26 decreases. Although the speed of the ring gear 26 decreases, the sun gear 23 always keeps running under the drive of the intermediate transmission shaft 21. At this time, the planetary gear 24 begins to revolve around the sun gear 23. Since the sun gear always keeps running, the three planetary gears 24 gradually rotate inside the ring gear 24 and are transmitted to the output shaft 30 through the planet carrier 25.

[0041] Through PID control, the rotational speed of the ring gear 26 can be accurately controlled, and then the shaft speed and torque of the output shaft 30 can be controlled through the planet carrier 25, outputting the torque required for the operation of the scraper reclaimer, and achieving the control of the torque of the transmission shaft by controlling the rotational speed.

[0042] The utility model effectively solves the problem of starting and braking with load of the scraper reclaimer, protects the chain and the motor of the reclaimer, and improves the use stability of the reclaimer.

[0043] The technical means disclosed in the solution of the present utility model are not limited to those disclosed in the above embodiments, and also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A scraper reclaimer drive device using a CST system, characterized by: The invention comprises a sprocket (2), a transmission shaft (3), a Hall sensor unit (4), a CST system (8) and a motor (10), wherein the output shaft of the motor (10) is fixedly connected to the input shaft (18) of the CST system, the output shaft (30) of the CST system is fixedly connected to the transmission shaft (3), the transmission shaft (3) is interference-connected to the sprocket (2), and the Hall sensor unit (4) is fixed on the transmission shaft (3) and electrically connected to the CST system (8).

2. The scraper reclaimer drive device using the CST system according to claim 1, characterized in that: The Hall sensor unit (4) comprises a turntable (41) and a Hall sensor (42), wherein the turntable (41) is sleeved on the transmission shaft (3), and a magnet (43) is fixedly provided on the turntable (41), wherein the magnet (43) is non-contactly connected to the Hall sensor (42), and the Hall sensor (42) is electrically connected to the CST system (8).

3. The scraper reclaimer drive device using the CST system according to claim 2, characterized in that: The CST system (8) includes a PLC control system, a PID controller (11) is provided in the PLC control system, and the Hall sensor (42) is electrically connected to the PID controller (11).

4. The scraper reclaimer drive device using the CST system according to claim 3, characterized in that: The CST system (8) further includes an electro-hydraulic servo system (12), a planetary gear mechanism (16) and a reduction transmission system (17). The input shaft (18) of the CST system drives the planetary gear mechanism (16) to rotate through the reduction transmission system (17). The planetary gear mechanism (16) drives the sprocket (2) to rotate through the output shaft (30) of the CST system. The PID controller (11) is electrically connected to the electro-hydraulic servo system (12). The electro-hydraulic servo system (12) adjusts the rotation of the planetary gear mechanism (16).

5. The scraper reclaimer drive device using the CST system according to claim 4, characterized in that: The reduction transmission system (17) includes a reduction driving gear (19), a reduction driven gear (22) and an intermediate transmission shaft (21), wherein the reduction driving gear (19) is sleeved on the input shaft (18) of the CST system, and the reduction driven gear (22) is sleeved on the intermediate transmission shaft (21), and the reduction driving gear (19) and the reduction driven gear (22) are meshed and connected, and bearings (20) are provided at both ends of the intermediate transmission shaft (21) and the input shaft (18) of the CST system, and the intermediate transmission shaft (21) and the input shaft (18) of the CST system both rotate in the CST system (8) through the bearings (20), and the intermediate transmission shaft (21) drives the planetary gear mechanism (16) to rotate.

6. The scraper reclaimer drive device using the CST system according to claim 5, characterized in that: The planetary gear mechanism (16) includes a sun gear (23), planetary gears (24), a planetary carrier (25) and a ring gear (26), wherein the sun gear (23) is sleeved on an intermediate transmission shaft (21), the sun gear (23) and the planetary gears (24) are both located in the ring gear (26), and the sun gear (23) is located at the center of the ring gear (26), a planetary carrier (25) is fixed on the planetary gear (24), and the planetary carrier (25) drives the output shaft (30) of the CST system to rotate, one end of the planetary gear (24) is meshed with the sun gear (23), and the other end of the planetary gear (24) is meshed with the ring gear (26), and the ring gear (26) is connected to the electro-hydraulic servo system (12).

7. The scraper reclaimer drive device using the CST system according to claim 6, characterized in that: The electro-hydraulic servo system (12) includes a hydraulic sensor (13), an electro-hydraulic servo valve (14) and a wet clutch (15). The wet clutch (15) includes a dynamic friction plate (27), a static friction plate (28) and a hydraulic cylinder (29). The dynamic friction plate (27) is provided with external teeth, and the dynamic friction plate (27) is embedded in the internal teeth of the gear ring (26) through the external teeth. The dynamic friction plate (27) is fixed on the clutch seat, and the clutch seat is fixedly connected to the piston rod of the hydraulic cylinder (29). The hydraulic cylinder (29) is connected to the electro-hydraulic servo valve (14) through a pipeline. The electro-hydraulic servo valve (14) is connected to the hydraulic sensor (13) through a pipeline. The hydraulic sensor (13) and the PID controller (11) are electrically connected.

8. The scraper reclaimer drive device using the CST system according to claim 1, characterized in that: A first elastic plum blossom coupling (9) is provided on the output shaft of the motor (10), and the output shaft of the motor (10) is connected to the input shaft (18) of the CST system through the first elastic plum blossom coupling (9). A second elastic plum blossom coupling (7) is provided on the output shaft (30) of the CST system, and the output shaft (30) of the CST system is connected to the transmission shaft (3) through the second elastic plum blossom coupling (7).

9. The scraper reclaimer drive device using the CST system according to claim 1, characterized in that: There are two sprockets (2), and the interval between the two sprockets (2) on the transmission shaft (3) is the size of the scraper. Each sprocket (2) is provided with a chain (1), and the chain (1) is meshed and connected with the sprocket (2).

10. The scraper reclaimer drive device using the CST system according to claim 1, characterized in that: Both ends of the transmission shaft (3) are also provided with a bearing platform (6) and a bearing seat (5), and both ends of the transmission shaft (3) are fixedly connected to the bearing platform (6) via the bearing seat (5).

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