A drive differential for a decanter centrifuge

Abstract

The utility model relates to the technical field of horizontal screw centrifuge, concretely is a kind of drive differential mechanism of horizontal screw centrifuge, including differential mechanism shell, the inner ring gear is rotatably mounted in the differential mechanism shell inside by bearing, three planetary gears are meshed and connected in the inner ring gear inside, three the planetary gears are arrayed distribution with inner ring gear center as base point, one sun gear is meshed and connected to three planetary gears, the sun gear is coaxially arranged with inner ring gear. By setting the planetary gear differential structure of 1:3 tooth number ratio in the shaft end of screw pusher, the controllable speed difference of screw pusher and rotary drum is realized, the mode of multiple-tooth meshing not only improves transmission efficiency, but also avoids the hysteresis of traditional mechanical speed regulation, ensures that the separation process of horizontal screw centrifuge is more stable. In addition, compared with multi-stage gear box, the volume of planetary differential mechanism is smaller, suitable for the integrated design of centrifuge, and the equipment floor space is saved.

Description

Technical Field

[0001] This utility model relates to the field of horizontal screw centrifuge technology, specifically to a drive differential for a horizontal screw centrifuge. Background Technology

[0002] In the field of solid-liquid separation, horizontal screw centrifuges are widely used due to their high efficiency and continuous separation performance. The drive differential, as a core component, directly affects separation efficiency and stability. Traditional horizontal screw centrifuge differentials suffer from problems such as complex transmission structures, inaccurate speed difference adjustment, and high energy consumption, leading to increased equipment operating costs and failing to meet the stringent requirements of fine chemical and environmental treatment industries. With the increasing demands for separation efficiency and product quality in industrial production, there is an urgent need for a drive differential that is compact, has stable transmission, and can achieve precise speed difference control. This ensures that the screw conveyor and the drum maintain the optimal speed difference, efficiently completing solid-liquid separation tasks while reducing energy consumption and maintenance costs.

[0003] As disclosed in the patent announcement CN218013384U, a drive device for a horizontal decanter centrifuge and a horizontal decanter centrifuge are provided. The drive device includes: a main motor, a spiral hydraulic pump, a drum hydraulic pump, a drum motor, a spiral motor, a hydraulic motor, and a hydraulic differential. The drum motor is used for drum drive connection with the horizontal decanter centrifuge body, and the spiral motor is used for spiral drive connection with the horizontal decanter centrifuge body. The main motor is driven by both the spiral hydraulic pump and the drum hydraulic pump. The spiral hydraulic pump is connected to the hydraulic differential, and the output shaft of the hydraulic differential is used for spiral drive connection with the horizontal decanter centrifuge body. The drum hydraulic pump is connected to the hydraulic motor, and the output shaft of the hydraulic motor is used for drum drive connection with the horizontal decanter centrifuge body.

[0004] While the aforementioned solutions can increase the output torque of the drive unit of the decanter centrifuge, thereby improving its slag discharge efficiency, the differential gear of this centrifuge primarily utilizes a hydraulic structure. This structure is complex, resulting in high manufacturing and maintenance costs. Furthermore, the hydraulic system is prone to oil leaks, necessitating shutdowns for inspection and maintenance, leading to insufficient stability and hindering production efficiency. Therefore, we propose a drive differential gear for the decanter centrifuge that improves the differential drive method, enhances the centrifuge's operational stability, and simultaneously reduces manufacturing and maintenance costs, alleviating the burden on enterprises. Utility Model Content

[0005] The purpose of this invention is to provide a drive differential for a horizontal screw centrifuge to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A drive differential for a horizontal screw centrifuge includes a differential housing. An internal gear ring is rotatably mounted inside the differential housing via bearings. Three planetary gears are meshed inside the internal gear ring and are arranged in an array with the center of the internal gear ring as the base point. A sun gear is meshed with the three planetary gears and is arranged coaxially with the internal gear ring. The tooth ratio of the planetary gears to the sun gear is 1:3. A driven bevel tooth is fixedly provided at one end of the gear shaft of the sun gear. The driven bevel tooth is meshed with a driving bevel tooth. A first servo motor is fixedly connected to the bottom end of the gear shaft of the driving bevel tooth via a coupling.

[0007] As a further embodiment of this utility model: a planetary carrier is fixedly provided on one side of the three planetary gears, an output shaft is fixedly provided at the center of the planetary carrier, one end of the output shaft passes through the first bearing seat and is fixedly connected to a spiral pusher, a first support frame is fixedly installed at the bottom of the first bearing seat, the first bearing seat is rotatably connected to the output shaft, and the first support frame is fixedly installed at the bottom of the first bearing seat.

[0008] As a further embodiment of this utility model: a rotating drum is provided on the outside of the spiral feeder, a rotating shaft is fixedly connected to one end of the rotating drum, a driven gear is fixedly provided on the outside of the rotating shaft, a driving gear is synchronously meshed with the driven gear through a gear belt, one end of the gear shaft of the driving gear passes through a second bearing seat and is fixedly connected to a second servo motor, the second bearing seat is rotatably connected to the gear shaft of the driving gear, and a second support frame is fixedly installed at the bottom of the second bearing seat.

[0009] As a further embodiment of this utility model: a centrifuge housing is provided on the outside of the drum, a drain port is provided on the bottom side of the centrifuge housing near the differential housing, a slag discharge port is provided on the bottom side of the centrifuge housing near the second servo motor, and a feed port is provided on one end of the rotating shaft.

[0010] As a further embodiment of this utility model: a mounting base is fixedly provided at the bottom of the differential housing, and a fixed base is fixedly connected to the bottom of the mounting base by bolts; a support platform is fixedly provided at the bottom of the second servo motor, and the second servo motor is fixedly installed on the top of the support platform by bolts; a third bearing seat is rotatably connected to the outside of the gear shaft of the active bevel gear, and a third support frame is fixedly installed at the bottom of the third bearing seat; the first servo motor is fixedly installed on one side of the third support frame.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This type of drive differential for a horizontal decanter centrifuge achieves a controllable speed difference between the screw conveyor and the rotating drum by setting a planetary gear differential structure with a 1:3 tooth ratio at the shaft end of the screw conveyor. The multi-tooth meshing not only improves transmission efficiency but also avoids the lag of traditional mechanical speed regulation, ensuring a more stable separation process in the horizontal decanter centrifuge. Furthermore, compared to multi-stage gearboxes, the planetary differential is smaller in size, making it suitable for integrated centrifuge design and saving space.

[0012] This type of drive differential for a horizontal screw centrifuge features a driven bevel gear fixed to one end of the sun gear shaft in a planetary gear differential structure. The perpendicular transmission structure between the driven and driving bevel gears improves the load-bearing capacity of the equipment. Furthermore, the high overlap ratio of the spiral bevel gears results in low noise and vibration during operation, thus extending the lifespan of bearings and gears, ensuring stable equipment operation, and improving separation efficiency. Attached Figure Description

[0013] Figure 1 A schematic diagram of the differential housing structure of a drive differential for a horizontal screw centrifuge; Figure 2 This is a schematic diagram of the overall structure of the drive differential of a horizontal screw centrifuge; Figure 3 A schematic diagram of the planetary gear structure of the drive differential of a horizontal screw centrifuge; Figure 4 A drive differential for a horizontal screw centrifuge Figure 2 Enlarged diagram of point A in the middle.

[0014] In the diagram: 1. Differential housing; 2. Internal gear ring; 3. Planetary gear; 4. Sun gear; 5. Driven bevel gear; 6. Driving bevel gear; 7. First servo motor; 8. Planetary carrier; 9. Output shaft; 10. Screw feeder; 11. First bearing housing; 12. First support frame; 13. Drum; 14. Rotating shaft; 15. Driven gear; 16. Gear belt; 17. Driving gear; 18. Second servo motor; 19. Second bearing housing; 20. Second support frame; 21. Centrifuge housing; 22. Drain port; 23. Slag discharge port; 24. Feed port; 25. Mounting base; 26. Fixed base; 27. Third bearing housing; 28. Third support frame; 29. ​​Support platform. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Example: A drive differential for a horizontal screw centrifuge, such as Figures 1-4 As shown, the system includes a differential housing 1. An internal gear ring 2 is rotatably mounted inside the differential housing 1 via bearings. Three planetary gears 3 are meshed inside the internal gear ring 2, arranged in an array with the center of the internal gear ring 2 as the base point. A sun gear 4 is meshed with the three planetary gears 3, and the sun gear 4 is coaxial with the internal gear ring 2. The gear ratio between the planetary gears 3 and the sun gear 4 is 1:3. A driven bevel gear 5 is fixedly mounted at one end of the sun gear 4's gear shaft. The driven bevel gear 5 meshes with a driving bevel gear 6. A first servo motor 7 is fixedly connected to the bottom end of the driving bevel gear 6's gear shaft via a coupling. Planetary gears 3 are fixedly mounted on one side of each of the three planetary gears 3. The planetary carrier 8 has an output shaft 9 fixedly mounted at its center. One end of the output shaft 9 passes through the first bearing seat 11 and is fixedly connected to a screw feeder 10. The first support frame 12 is fixedly mounted at the bottom of the first bearing seat 11. The first bearing seat 11 is rotatably connected to the output shaft 9. The first support frame 12 is fixedly mounted at the bottom of the first bearing seat 11. The differential housing 1 has a mounting base 25 fixedly mounted at the bottom. The mounting base 25 is fixedly connected to a fixing base 26 by bolts. The gear shaft of the active bevel gear 6 is rotatably connected to a third bearing seat 27. The bottom of the third bearing seat 27 is fixedly mounted to a third support frame 28. The first servo motor 7 is fixedly mounted on one side of the third support frame 28.

[0018] In this embodiment, the first servo motor 7 drives the active bevel gear 6 to rotate, which in turn drives the driven bevel gear 5 that meshes with it to rotate, and further drives the output shaft 9 to rotate. One end of the output shaft 9 is fixedly connected to the shaft of the sun gear 4, which drives the sun gear 4 to rotate. The sun gear 4 meshes with three planetary gears 3, so that the three planetary gears 3 rotate along the tooth grooves on the internal gear ring 2, thereby reducing the transmission speed of the output shaft 9 and realizing the speed difference effect between the spiral pusher 10 and the drum 13.

[0019] like Figures 1-2As shown, a rotating drum 13 is provided on the outside of the screw feeder 10. A rotating shaft 14 is fixedly connected to one end of the rotating drum 13. A driven gear 15 is fixedly provided on the outside of the rotating shaft 14. A driving gear 17 is synchronously meshed with the driven gear 15 through a gear belt 16. One end of the gear shaft of the driving gear 17 passes through a second bearing seat 19 and is fixedly connected to a second servo motor 18. The second bearing seat 19 is rotatably connected to the gear shaft of the driving gear 17. A second support frame 20 is fixedly installed at the bottom of the second bearing seat 19. A centrifuge housing 21 is provided on the outside of the rotating drum 13. A drain port 22 is opened on the bottom side of the centrifuge housing 21 near the differential housing 1. A slag discharge port 23 is opened on the bottom side of the centrifuge housing 21 near the second servo motor 18. A feed port 24 is provided at one end of the rotating shaft 14. A support platform 29 is fixedly provided at the bottom of the second servo motor 18. The second servo motor 18 is fixedly installed on the top of the support platform 29 by bolts.

[0020] In this embodiment, the second servo motor 18 drives the drive gear 17 to rotate, which in turn drives the driven gear 15 to rotate synchronously through the gear belt 16, thereby achieving the rotation effect of the drum 13.

[0021] In this embodiment, the drive differential of a horizontal screw centrifuge is used by first connecting the device to an external power source and injecting material into the drum 13 through the feed inlet 24. Then, the first servo motor 7 and the second servo motor 18 are started. The second servo motor 18 drives the drive gear 17 to rotate, which in turn drives the driven gear 15 to rotate synchronously through the gear belt 16, thus achieving the rotation effect of the drum 13. At the same time, the first servo motor 7 drives the drive bevel gear 6 to rotate, which in turn drives the driven bevel gear 5 that meshes with it to rotate, further driving the output shaft 9 to rotate. One end of the output shaft 9 is fixedly connected to the shaft of the sun gear 4, driving the sun gear 4 to rotate. The sun gear 4 meshes with three planetary gears 3, causing the three planetary gears 3 to rotate along the tooth grooves on the internal gear ring 2, thereby reducing the transmission speed of the output shaft 9 and achieving the rotational speed difference effect between the screw feeder 10 and the drum 13. This continuously pushes the solid particles deposited on the inner wall of the drum 13 towards the slag discharge port 23 at the conical end of the drum 13, achieving the solid-liquid separation effect.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A drive differential for a horizontal screw centrifuge, comprising a differential housing (1), characterized in that: An internal gear ring (2) is rotatably mounted inside the differential housing (1) via bearings. Three planetary gears (3) are meshed inside the internal gear ring (2). The three planetary gears (3) are arranged in an array with the center of the internal gear ring (2) as the base point. A sun gear (4) is meshed between the three planetary gears (3) and the internal gear ring (2). The ratio of the number of teeth of the planetary gears (3) to the number of teeth of the sun gear (4) is one to three. One end of the gear shaft of the sun gear (4) is fixedly provided with a driven bevel tooth (5), which meshes with a driving bevel tooth (6). The bottom end of the gear shaft of the driving bevel tooth (6) is fixedly connected to a first servo motor (7) via a coupling.

2. The drive differential for a horizontal screw centrifuge according to claim 1, characterized in that: A planetary carrier (8) is fixedly installed on one side of each of the three planetary gears (3). An output shaft (9) is fixedly installed at the center of the planetary carrier (8). One end of the output shaft (9) passes through the first bearing seat (11) and is fixedly connected to a screw feeder (10). A first support frame (12) is fixedly installed at the bottom of the first bearing seat (11). The first bearing seat (11) is rotatably connected to the output shaft (9). The first support frame (12) is fixedly installed at the bottom of the first bearing seat (11).

3. The drive differential for a horizontal screw centrifuge according to claim 2, characterized in that: The spiral feeder (10) is provided with a rotating drum (13) on the outside. A rotating shaft (14) is fixedly connected to one end of the rotating drum (13). A driven gear (15) is fixedly provided on the outside of the rotating shaft (14). A driving gear (17) is synchronously meshed with the driven gear (15) through a gear belt (16).

4. The drive differential for a horizontal screw centrifuge according to claim 3, characterized in that: One end of the gear shaft of the drive gear (17) passes through the second bearing seat (19) and is fixedly connected to the second servo motor (18). The second bearing seat (19) is rotatably connected to the gear shaft of the drive gear (17). A second support frame (20) is fixedly installed at the bottom of the second bearing seat (19).

5. The drive differential for a horizontal screw centrifuge according to claim 3, characterized in that: A centrifuge housing (21) is provided on the outside of the drum (13). A drain port (22) is provided on the bottom side of the centrifuge housing (21) near the differential housing (1). A slag discharge port (23) is provided on the bottom side of the centrifuge housing (21) near the second servo motor (18). A feed port (24) is provided on one end of the rotating shaft (14).

6. The drive differential for a horizontal screw centrifuge according to claim 1, characterized in that: The differential housing (1) is fixedly provided with a mounting base (25) at the bottom end, and a fixing base (26) is fixedly connected to the bottom end of the mounting base (25) by bolts.

7. The drive differential for a horizontal screw centrifuge according to claim 1, characterized in that: The gear shaft of the active bevel gear (6) is rotatably connected to a third bearing seat (27), and a third support frame (28) is fixedly installed at the bottom of the third bearing seat (27). The first servo motor (7) is fixedly installed on one side of the third support frame (28).

8. The drive differential for a horizontal screw centrifuge according to claim 4, characterized in that: The second servo motor (18) is fixedly mounted on a support platform (29) at its bottom end, and the second servo motor (18) is fixedly mounted on the top of the support platform (29) by bolts.

Images