Structure of built-in planetary differential of horizontal screw filter centrifuge

Abstract

This utility model relates to the field of horizontal decanter centrifuge technology and discloses a structure for a horizontal decanter filter centrifuge with a built-in planetary differential. The structure includes a drum serving as the centrifuge rotor and a helical gear located inside the drum. The end of the drum is connected to a planetary gear differential via a torque protector. The internal structure of the planetary gear differential passes through the drum and connects to the helical gear. This structure, with its built-in planetary differential, ensures sufficient torque while maintaining a simple structure requiring only one transmission. It facilitates the use of a single, thin-oil lubrication system. Lubricating oil enters the differential through a universal joint and exits through oil outlets on the left and right housings of the differential, lubricating the main bearings thoroughly without debris residue. The overall structure of the equipment is free of drag, resulting in smooth transmission, low vibration, extended service life, and reduced operating noise.

Description

Technical Field

[0001] This utility model relates to the field of horizontal screw centrifuge technology, specifically to a structure of a horizontal screw filter centrifuge with a built-in planetary differential. Background Technology

[0002] A horizontal screw centrifuge is a horizontal, continuously operating filtration device with screw discharge. The centrifuge typically consists of two rotors: a drum and a screw feeder (or simply screw). When the drum rotates at high speed, the slurry inside rotates with it and is subjected to centrifugal force, which is many times greater than gravity. This causes solid particles to separate from the liquid, settling from the drum's axis onto the inner wall. The screw feeder, located inside the drum, rotates at a lower speed than the drum and pushes the deposited solid particles to the discharge port. The speed difference between the outer drum and the screw feeder depends on the transmission ratio and speed of the differential gear.

[0003] However, in the current market, the differentials of decanter centrifuges typically come in two forms: either an internal cycloidal differential or a rear-mounted, oil-bath lubricated planetary differential. The former has the disadvantage of low torque, leading to excessively high screw conveyor torque, increasing equipment load, and even triggering motor overload protection shutdown. The latter has the disadvantage of difficulty in completely removing metal shavings from the differential, increasing the complexity of the machine structure, making it prone to incomplete lubrication and high temperatures. Furthermore, the separate connection method results in excessively long rear extension, causing significant vibration, leading to short service life and high noise levels in decanter centrifuges. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a structure for a horizontal screw filter centrifuge with a built-in planetary differential, thus solving the problems mentioned in the background.

[0005] This utility model provides the following technical solution: a structure for a horizontal screw filter centrifuge with a built-in planetary differential, comprising: a drum as the centrifuge rotor, and a spiral located inside the drum, wherein the end of the drum is connected to a planetary gear differential via a torque protector, and the internal structure of the planetary gear differential passes through the drum and is connected to the spiral.

[0006] The planetary gear differential includes a first output shaft that passes through the drum and is connected to a helix. The end of the first output shaft away from the helix is ​​connected to a second output shaft through a planetary gear carrier. A right shaft housing and a left shaft housing are respectively fitted on the first output shaft and the second output shaft, and the ends of the right shaft housing and the left shaft housing facing each other cover the planetary gear carrier and are sealed together.

[0007] The end of the second output shaft away from the planetary gear carrier passes through the left shaft housing and has an oil inlet, which is connected to a universal rotary joint.

[0008] Preferably, the left and right shaft housings are sealed together to form a receiving space, and the structure of the planetary gear carrier is adapted to the internal shape of the receiving space.

[0009] Preferably, the left and right shaft housings are provided with a second oil outlet and a first oil outlet at the neck of the contraction point, respectively, and both the second and first oil outlets are connected to the accommodating space.

[0010] Preferably, a hole is formed at the center of the second output shaft through an oil inlet, and the universal joint is connected to the interior of the receiving space through the oil inlet.

[0011] Preferably, the drum is provided with a housing, and a box for supporting and accommodating the planetary gear differential is installed on the housing at the end where the drum connects to the planetary gear differential, and both ends of the planetary gear differential pass through the box and are connected to it through bearings.

[0012] Preferably, the end of the planetary gear differential away from the drum passes through the housing and is fitted with a pulley, one end of which has a notch for accommodating a universal rotary joint.

[0013] Preferably, a base is installed at the bottom of the housing, and an oil cooler is provided on the base and connected to a universal rotary joint via a pipe.

[0014] Preferably, the bottom of the base is placed on the ground via shock-absorbing feet.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This horizontal screw centrifuge features a built-in planetary differential structure. While ensuring torque, it adopts an internal planetary gear differential, which has a simple structure and only requires one transmission. It is convenient to use an overall thin oil lubrication method. The lubricating oil enters the differential from the universal joint and exits from the oil outlet holes of the left and right housings of the differential, and lubricates the main bearing. The lubrication is thorough and there is no debris residue. The overall structure of the equipment is free from drag, the transmission is smooth, the vibration is small, the service life of the equipment is extended, and the noise during operation is reduced.

[0017] 2. This horizontal screw centrifuge has a built-in planetary differential structure. By setting up an oil cooler, the oil entering the planetary gear differential is cooled during equipment operation. In conjunction with the oil outlet on the planetary gear differential, a continuous cooling effect is achieved. This ensures that the oil is fully distributed inside the planetary gear differential as it rotates, while avoiding excessively high temperatures during long-term operation. Attached Figure Description

[0018] Figure 1 This is a schematic cross-sectional view of the present invention.

[0019] Figure 2 This is a schematic diagram of the planetary gear differential structure of this utility model.

[0020] In the diagram: 1. Drum; 2. Helix; 3. Planetary gear differential; 31. First output shaft; 32. Second output shaft; 33. Planetary gear carrier; 34. Left shaft housing; 35. Right shaft housing; 36. First oil outlet; 37. Oil inlet; 38. Second oil outlet; 4. Pulley; 5. Universal joint; 6. Base; 7. Oil cooler; 8. Housing; 9. Casing. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-2 A structure for a horizontal screw filter centrifuge with a built-in planetary differential includes: a drum 1 serving as the centrifuge rotor, and a spiral 2 located inside the drum 1. The end of the drum 1 is connected to a planetary gear differential 3 via a torque protector. The internal structure of the planetary gear differential 3 passes through the drum 1 and is connected to the spiral 2.

[0023] The planetary gear differential 3 includes a first output shaft 31 that passes through the drum 1 and is connected to the helix 2. The end of the first output shaft 31 away from the helix 2 is connected to the second output shaft 32 through a planetary gear carrier 33. A right shaft housing 35 and a left shaft housing 34 are respectively fitted on the first output shaft 31 and the second output shaft 32, and the ends of the right shaft housing 35 and the left shaft housing 34 facing each other cover the planetary gear carrier 33 and are sealed together.

[0024] The end of the second output shaft 32 away from the planetary gear carrier 33 passes through the left shaft housing 34 and has an oil inlet 37, on which a universal rotary joint 5 is connected.

[0025] This solution, by adopting a built-in planetary gear differential 3, can continuously feed, separate, wash and unload at full speed. It features a compact structure, continuous operation, stable operation, strong adaptability, large production capacity and convenient maintenance. It is suitable for separating suspensions containing solid particles larger than 0.1mm and with a concentration range of 10-90%.

[0026] The left shaft housing 34 and the right shaft housing 35 are sealed together to form a receiving space, and the structure of the planetary gear carrier 33 is adapted to the internal shape of the receiving space.

[0027] That is, the planetary gear carrier 33 is enclosed and built into the receiving space formed by the closing of the left shaft housing 34 and the right shaft housing 35. The structure is simple, easy to disassemble and maintain, and can store lubricating oil, ensuring the full lubrication effect of the planetary gear carrier 33.

[0028] The left shaft housing 34 and the right shaft housing 35 are respectively provided with a second oil outlet 38 and a first oil outlet 36 at the neck of the contraction point, and both the second oil outlet 38 and the first oil outlet 36 are connected to the accommodating space.

[0029] That is, by setting a second oil outlet 38 and a first oil outlet 36, after the lubricating oil enters the receiving space, it needs to pass through the planetary gear carrier 33 to reach the second oil outlet 38 or the first oil outlet 36. At the same time, as the planetary gear carrier 33 rotates, the oil that reaches the second oil outlet 38 and the first oil outlet 36 is continuously thrown out, thereby discharging the internal metal shavings and improving the service life of the planetary gear differential 3.

[0030] The second output shaft 32 has a hole formed through the oil inlet 37 at its center, and the universal rotary joint 5 is connected to the interior of the accommodating space through the oil inlet 37.

[0031] That is, without affecting the operation of the planetary gear differential 3, lubricating oil is pumped into the planetary gear differential 3 through the universal rotary joint 5 to ensure the circulation effect of the lubricating oil.

[0032] The drum 1 is provided with a housing 9 on its exterior. A box 8 for supporting and accommodating the planetary gear differential 3 is installed on the housing 9 at the end where the drum 1 is connected to the planetary gear differential 3. Both ends of the planetary gear differential 3 pass through the box 8 and are connected to it through bearings.

[0033] That is, by setting the housing 8, not only is the planetary gear differential 3 supported, but the planetary gear differential 3 is also placed in a sealed environment, so that the lubricating oil discharged by the planetary gear differential 3 during operation is collected by the housing 8 and can be recycled after filtration, thus reducing the loss of lubricating oil.

[0034] The planetary gear differential 3, with one end away from the drum 1, passes through the housing 8 and is fitted with a pulley 4. One end of the pulley 4 has a notch for accommodating the universal rotary joint 5.

[0035] The bottom of the housing 8 is equipped with a base 6, and the base 6 is provided with an oil cooler 7 connected to a universal rotary joint 5 via a pipe.

[0036] That is, during equipment operation, the oil cooler 7 cools the oil entering the planetary gear differential 3, and cooperates with the oil outlet on the planetary gear differential 3 to continuously introduce cold oil into the planetary gear differential 3 and discharge hot oil, thereby achieving the cooling effect.

[0037] The base 6 is placed on the ground with shock-absorbing feet. The base 6 adds an extra support point to the planetary gear differential 3, reducing the impact of the drum 1 and the screw 2 on the planetary gear differential 3 during operation, thereby reducing the vibration and noise.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure for a horizontal screw filter centrifuge with a built-in planetary differential, characterized in that, include: The drum (1) serves as the rotor of the centrifuge, and the spiral (2) is located inside the drum (1). The end of the drum (1) is connected to a planetary gear differential (3) via a torque protector. The internal structure of the planetary gear differential (3) passes through the drum (1) and is connected to the spiral (2). The planetary gear differential (3) includes a first output shaft (31) that passes through the drum (1) and is connected to the helix (2). The end of the first output shaft (31) away from the helix (2) is connected to the second output shaft (32) through a planetary gear carrier (33). The first output shaft (31) and the second output shaft (32) are respectively fitted with a right shaft housing (35) and a left shaft housing (34), and the opposite ends of the right shaft housing (35) and the left shaft housing (34) cover the planetary gear carrier (33) and are sealed together. The end of the second output shaft (32) away from the planetary gear carrier (33) passes through the left shaft housing (34) and has an oil inlet (37), on which a universal rotary joint (5) is connected.

2. The structure of a horizontal screw filter centrifuge with a built-in planetary differential according to claim 1, characterized in that, The left shaft housing (34) and the right shaft housing (35) are sealed together to form a receiving space, and the structure of the planetary gear carrier (33) is adapted to the internal shape of the receiving space.

3. The structure of a horizontal screw filter centrifuge with a built-in planetary differential according to claim 2, characterized in that, The left shaft housing (34) and the right shaft housing (35) are respectively provided with a second oil outlet (38) and a first oil outlet (36) at the neck of the contraction point, and both the second oil outlet (38) and the first oil outlet (36) are connected to the accommodating space.

4. The structure of a horizontal screw filter centrifuge with a built-in planetary differential according to claim 2, characterized in that, The center of the second output shaft (32) is formed by an oil inlet (37), and the universal rotary joint (5) is connected to the interior of the accommodating space through the oil inlet (37).

5. The structure of a horizontal screw filter centrifuge with a built-in planetary differential according to claim 1, characterized in that, The drum (1) is provided with a housing (9) on its exterior. A housing (8) for supporting and accommodating the planetary gear differential (3) is installed on the housing (9) at the end where the drum (1) is connected to the planetary gear differential (3). Both ends of the planetary gear differential (3) pass through the housing (8) and are connected to it through bearings.

6. The structure of a horizontal screw filter centrifuge with a built-in planetary differential according to claim 5, characterized in that, The planetary gear differential (3) has one end away from the drum (1) passing through the housing (8) and fitted with a pulley (4), one end of which has a notch for accommodating a universal rotary joint (5).

7. The structure of a horizontal screw filter centrifuge with a built-in planetary differential according to claim 5, characterized in that, The bottom of the housing (8) is equipped with a base (6), and an oil cooler (7) is provided on the base (6) and connected to a universal rotary joint (5) via a pipe.

8. The structure of a horizontal screw filter centrifuge with a built-in planetary differential according to claim 7, characterized in that, The bottom of the base (6) is placed on the ground by shock-absorbing feet.

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