Oil throwing device for underwater granulator
By designing an oil-sliding device for underwater pelletizer, using centrifugal action and flow guide part to cooperate, the problem of grease on the transmission shaft entering the cooling water is solved, the grease quality is improved and the oil-absorbing cotton is replaced, and the efficient collection and reduction of reattachment is achieved.
Patent Information
- Application Number
- CN202422078470.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-08-26
AI Technical Summary
In existing underwater pelletizers, lubricating grease on the transmission shaft is easily entered into the cooling water, affecting the quality of plastic pelletizing.
An oil-swinging device for underwater pelletizer is designed, including a transmission shaft, an oil degassing tank, a flow guide and an oil storage section. The oil and grease are directed to the oil storage section for collection through centrifugation. The joint guidance of the flow guide and the partition ring is used to reduce the oil and grease adhesion to the transmission shaft again, and the oil and grease are collected through the oil-absorbing cotton.
It effectively reduces the possibility of oil entering the granular area, improves the granular quality, and facilitates the replacement and maintenance of oil-absorbing cotton.
Smart Images
Figure CN223236708U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of underwater pelletizers, and in particular to an oil-spinning device for an underwater pelletizer. Background Art
[0002] Underwater pelletizer is a common equipment in the field of plastic processing. It mainly heats the plastic into a melt and then transports it to cooling water through a supply device. While the plastic melt is cooled by the cooling water, the plastic melt is cut into pellets by the pelletizer's pelletizing device.
[0003] Existing pelletizing devices generally include a drive shaft, a cutter, and a drive member. The cutter is mounted on the end of the drive shaft, and the drive member and the drive shaft are in driving cooperation. When the plastic melt needs to be cut, the drive member drives the cutter through the drive shaft, and the rotating cutter cuts the plastic melt into pellets.
[0004] At present, in order to reduce the working resistance of the drive shaft during its rotation, the drive shaft is generally coated with lubricating grease. During the operation of the drive shaft, the grease on the drive shaft sometimes flows along the drive shaft into the cooling water, thereby affecting the quality of plastic pelletizing. Utility Model Content
[0005] In order to facilitate blocking of grease on the transmission shaft, the present application provides an oil-spinning device for an underwater pelletizer.
[0006] The oil-spinning device for an underwater pelletizer provided in this application adopts the following technical solution:
[0007] An oil-spinning device for an underwater pelletizer, the oil-spinning device is used to clean grease on the end of a transmission shaft, the oil-spinning device comprises:
[0008] transmission shaft;
[0009] An oil removal tank is provided with a separator ring inside the oil removal tank, the separator ring divides the internal cavity of the oil removal tank into a barrier cavity and an oil-swinging cavity, and the transmission shaft rotates through the oil removal tank and the separator ring;
[0010] A guide portion is mounted on the inner wall of the oil-swing chamber, and the transmission shaft rotates and passes through the guide portion;
[0011] An oil storage part, wherein an oil drain hole is provided on the inner wall of the oil-swinging chamber, and the oil storage part is installed at the oil drain hole;
[0012] The grease moves inside the barrier chamber and the oil-swing chamber under the centrifugal action of the transmission shaft, and the guide portion guides the grease inside the oil-swing chamber to the oil storage portion at the oil drain hole for collection.
[0013] Optionally, the oil removal tank includes a cylinder, a front end cover installed at one end of the cylinder, and a rear end cover installed at the other end of the cylinder.
[0014] Optionally, an arc-shaped transition is formed between a side of the separation ring close to the guide portion and an inner wall of the oil removal tank.
[0015] Optionally, the guide portion includes an adjustment cylinder sealed on the transmission shaft and a guide ring coaxially mounted on the outer circumference of the adjustment cylinder, and the outer diameter of the guide ring gradually increases in a direction from approaching the separation ring to away from the separation ring.
[0016] Optionally, an oil collecting groove is provided on the side wall of the rear end cover close to the oil drain hole, and the oil storage portion is placed in the oil collecting groove.
[0017] Optionally, the oil storage portion includes oil-absorbing cotton installed at the oil collecting groove and an oil storage shell installed on the rear end cover, and the oil storage shell is used to position the oil-absorbing cotton.
[0018] Optionally, a positioning rod is provided on a side of the rear end cover close to the oil storage shell, a fastening nut is threadedly connected to the positioning rod, the positioning rod passes through the oil storage shell, and the fastening nut presses the oil storage shell onto the rear end cover.
[0019] Optionally, a sealing gasket is installed on a side of the oil storage shell close to the rear end cover.
[0020] Optionally, a plurality of limiting units are installed on the oil storage shell, and the limiting units include a limiting rod installed on the oil storage shell and a limiting plate installed at the end of the limiting rod, and the oil-absorbing cotton is located between the oil storage shell and the limiting plate.
[0021] Optionally, the oil storage shell is provided with a spirally arranged observation groove, which diverges from the center of the oil storage shell to the periphery of the oil storage shell, and a transparent observation plate is installed at the observation groove.
[0022] In summary, this application includes at least one of the following beneficial technical effects:
[0023] 1. As the drive shaft rotates, grease adhered to the drive shaft migrates within the barrier chamber under the centrifugal force of the shaft's rotation. When grease penetrates the oil-swing chamber, a small gap between the adjustment barrel and the separator ring reduces the possibility of grease re-adhering to the drive shaft. As grease migrates within the oil-swing chamber, the curved surface between the separator ring and the barrel, along with the guide ring, guides the grease through the drain hole and into the oil collection trough, where it is collected. This increases the contact area between the grease and the absorbent pads. The absorbent pads placed in the oil collection trough absorb the grease, enhancing grease absorption. A limit plate holds the absorbent pads in place during operation, ensuring their stability. A transparent observation panel in the observation trough allows operators to monitor the absorbent pad's absorption status, facilitating timely replacement and improving grease absorption. To replace the absorbent pads, simply loosen the retaining nut and remove the oil reservoir, making replacement easier. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.
[0025] Figure 2 It is a top view of the overall structure in the embodiment of the present application.
[0026] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.
[0027] Figure 4 It is a schematic diagram of the rear end cover structure in an embodiment of the present application.
[0028] Figure 5 It is a schematic diagram of the oil storage structure in the embodiment of the present application.
[0029] Figure 6 It is a schematic diagram showing the relative positions of the oil-absorbing cotton and the limiting unit in the embodiment of the present application.
[0030] Description of reference numerals:
[0031] 1. Drive shaft; 2. Oil removal tank; 21. Cylinder; 22. Front cover; 23. Rear cover; 24. Separator ring; 25. Oil drain hole; 26. Oil collecting trough; 27. Positioning rod; 28. Fastening nut; 3. Guide part; 31. Adjustment cylinder; 32. Guide ring; 4. Oil storage part; 41. Oil storage shell; 42. Oil-absorbing cotton; 43. Sealing gasket; 44. Limit unit; 45. Observation slot; 46. Observation plate. DETAILED DESCRIPTION
[0032] The following is combined with Figures 1-6 This application is described in further detail.
[0033] The embodiment of the present application discloses an oil-spinning device for an underwater pelletizer.
[0034] An oil-swing device for an underwater pelletizer includes a drive shaft 1, an oil removal tank 2, a diversion section 3, and an oil storage section 4. One end of the drive shaft 1 is fixedly connected to the cutter of the pelletizer, and the drive shaft 1 is driven to rotate by the driving member of the pelletizer. The drive shaft 1 passes through the oil removal tank 2, and the drive shaft 1 and the oil removal tank 2 are rotatably matched. The diversion section 3 is fixedly installed inside the oil removal tank 2, and the drive shaft 1 passes through the diversion section 3, and the drive shaft 1 and the diversion section 3 are rotatably matched. A plurality of oil drain holes 25 are formed on the side wall of the oil removal tank 2, and the oil storage section 4 is fixedly installed at the oil drain holes 25.
[0035] When the drive shaft 1 rotates, the grease attached to the drive shaft 1 moves inside the de-oiling tank 2 under the centrifugal action of the rotation of the drive shaft 1. During the movement of the grease inside the de-oiling tank 2, the grease is guided to the oil drain hole 25 through the guide portion 3, and the grease discharged from the oil drain hole 25 is collected and stored by the oil storage portion 4, thereby reducing the possibility of grease entering the working area of the cutter from the drive shaft 1 and affecting the pelletizing quality.
[0036] The oil removal tank 2 includes a cylinder 21, a front cover 22, and a rear cover 23. The front cover 22 and the rear cover 23 are fixedly mounted on both ends of the cylinder 21. A separator ring 24 is coaxially and integrally formed on the inner wall of the cylinder 21. The transmission shaft 1 passes through the front cover 22, the rear cover 23, and the separator ring 24, and the front cover 22, the rear cover 23, and the separator ring 24 are all in rotational engagement with the transmission shaft 1.
[0037] The front end cover 22, the cylinder 21, and the separator ring 24 form a barrier chamber. The rear end cover 23, the cylinder 21, and the separator ring 24 form an oil-slinging chamber. The guide unit 3 is mounted within the oil-slinging chamber. Several oil drain holes 25 are circumferentially defined along the axis of the cylinder 21 near the rear end cover 23. Several oil collecting grooves 26 corresponding to the drain holes 25 are defined on one side of the rear end cover 23.
[0038] The grease thrown out by the centrifugal action of the rotation of the transmission shaft 1 is blocked by the blocking cavity. When the grease leaks into the oil-throwing cavity, the guide part 3 guides the grease so that the grease is discharged from the oil discharge hole 25 to the inside of the oil collecting groove 26 for collection.
[0039] The guide portion 3 includes an adjustment tube 31 and a guide ring 32. The guide ring 32 is coaxially mounted on the outer circumference of the adjustment tube 31, and the adjustment tube 31 and the guide ring 32 are integrally formed. The transmission shaft 1 passes through the adjustment tube 31, and the transmission shaft 1 and the adjustment tube 31 rotate in conjunction. The guide ring 32 is fixedly mounted on the rear end cover 23.
[0040] The smaller gap between the regulating cylinder 31 and the separator ring 24 reduces the possibility of grease thrown off by the centrifugal force of the drive shaft 1 reattaching to the drive shaft 1. To further reduce the reattachment of grease to the drive shaft 1 and facilitate grease discharge from the oil drain hole 25, the outer diameter of the guide ring 32 gradually increases from the direction closer to the separator ring 24 to the direction away from the separator ring 24.
[0041] At the same time, in order to further move the grease toward the oil drain hole 25, a circular arc transition is made between the side of the separating ring 24 close to the rear end cover 23 and the cylinder 21. The circular arc guides the grease, and the cooperation between the circular arc and the guide ring 32 further improves the convenience of discharging the grease from the oil drain hole 25.
[0042] The oil storage portion 4 includes oil-absorbing cotton 42 and an oil storage shell 41. The oil storage shell 41 is arranged in a ring shape, and the opening of the oil storage shell 41 faces the rear end cover 23. A plurality of positioning rods 27 are fixedly installed on the side of the rear end cover 23 close to the oil storage shell 41, and a fastening nut 28 is threadedly connected to the positioning rod 27. The oil storage shell 41 is provided with positioning holes corresponding to the plurality of positioning rods 27, and the positioning rods 27 and the corresponding plug-in fit. When the oil storage shell 41 is installed on the rear end cover 23, the positioning rods 27 are inserted into the corresponding positioning holes, and then the oil storage shell 41 is pressed against the rear end cover 23 by the fastening nut 28 on the positioning rods 27. In order to further improve the sealing between the oil storage shell 41 and the rear end cover 23, a sealing gasket 43 is fixedly installed on the side of the oil storage shell 41 close to the rear end cover 23, and the sealing gasket 43 contacts the rear end cover 23.
[0043] The oil-absorbing cotton 42 is installed inside the oil reservoir 41. To improve the installation stability of the oil-absorbing cotton 42, the oil reservoir 41 is fixed with several limiting units 44. Each limiting unit 44 includes a limiting rod and a limiting plate. The limiting rod and limiting plate are integrally formed, and the limiting rod is threadedly connected to the oil reservoir 41.
[0044] When placing the oil-absorbing cotton 42, it is placed inside the oil reservoir 41. The limiting rod and oil reservoir 41 are then threaded together, and the limiting plate is used to limit the position of the oil-absorbing cotton 42. To monitor the oil absorption of the oil-absorbing cotton 42, the oil reservoir 41 is provided with a spiral observation groove 45. The observation groove 45 extends from the center of the oil reservoir 41 to the periphery of the oil reservoir 41. A transparent observation plate 46 is installed in the observation groove 45.
[0045] The implementation principle of the oil-swing device for an underwater pelletizer in the embodiment of the present application is as follows: during the rotation of the transmission shaft 1, the grease attached to the transmission shaft 1 moves inside the barrier chamber under the centrifugal action of the rotation of the transmission shaft 1. When the grease penetrates into the oil-swing chamber, the smaller gap between the adjustment cylinder 31 and the separation ring 24 reduces the possibility that the grease inside the oil-swing chamber will adhere to the transmission shaft 1 again. When the grease moves inside the oil-swing chamber, the arc surface between the separation ring 24 and the cylinder 21 and the guide ring 32 cooperate with each other to guide the grease, so that the grease enters the oil collecting groove 26 from the oil discharge hole 25 and converges, thereby increasing the contact area between the grease and the oil-absorbing cotton 42, and the grease is adsorbed and collected by the oil-absorbing cotton 42 placed at the oil collecting groove 26, thereby improving the adsorption effect of the grease. During the operation of the oil-absorbing cotton 42, the limit plate limits the position of the oil-absorbing cotton 42, improving the placement stability of the oil-absorbing cotton 42. At the same time, the staff can observe the absorption of the oil-absorbing cotton 42 through the transparent observation plate 46 at the observation groove 45, facilitating timely replacement of the oil-absorbing cotton 42, thereby improving the grease absorption effect of the oil-absorbing cotton 42. When the oil-absorbing cotton 42 needs to be replaced, the fastening nut 28 can be simply loosened and the oil storage shell 41 can be removed, thereby improving the convenience of replacing the oil-absorbing cotton 42.
[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. An oil-spinning device for an underwater pelletizer, the oil-spinning device being used to clean grease at the end of a transmission shaft (1), characterized in that: The oil-spinning device comprises: Drive shaft (1); An oil removal tank (2), wherein a separation ring (24) is installed inside the oil removal tank (2), and the separation ring (24) separates the internal cavity of the oil removal tank (2) into a blocking cavity and an oil-swinging cavity, and the transmission shaft (1) rotates through the oil removal tank (2) and the separation ring (24); A flow guide portion (3) is mounted on the inner wall of the oil-swing chamber, and the transmission shaft (1) rotates and passes through the flow guide portion (3); An oil storage portion (4), an oil drain hole (25) is provided on the inner wall of the oil-swinging chamber, and the oil storage portion (4) is installed at the oil drain hole (25); Grease moves inside the barrier chamber and the oil-swing chamber under the centrifugal action of the transmission shaft (1), and the guide portion (3) guides the grease inside the oil-swing chamber to the oil storage portion (4) at the oil drain hole (25) for collection.
2. The oil-spinning device for an underwater pelletizer according to claim 1, characterized in that: The oil removal tank (2) comprises a cylinder (21), a front end cover (22) mounted on one end of the cylinder (21), and a rear end cover (23) mounted on the other end of the cylinder (21).
3. The oil-spinning device for an underwater pelletizer according to claim 1, characterized in that: An arc-shaped transition is formed between the side of the separation ring (24) close to the guide portion (3) and the inner wall of the oil removal tank (2).
4. The oil-spinning device for an underwater pelletizer according to claim 3, characterized in that: The guide portion (3) comprises an adjustment cylinder (31) sealingly sleeved on the transmission shaft (1) and a guide ring (32) coaxially mounted on the outer peripheral surface of the adjustment cylinder (31), wherein the outer diameter of the guide ring (32) gradually increases in a direction from approaching the separation ring (24) to moving away from the separation ring (24).
5. The oil-spinning device for an underwater pelletizer according to claim 2, characterized in that: An oil collecting groove (26) is provided on the side wall of the rear end cover (23) close to the oil drain hole (25), and the oil storage portion (4) is placed in the oil collecting groove (26).
6. The oil-spinning device for an underwater pelletizer according to claim 5, characterized in that: The oil storage portion (4) comprises oil-absorbing cotton (42) installed at the oil collecting groove (26) and an oil storage shell (41) installed on the rear end cover (23), and the oil storage shell (41) is used to position the oil-absorbing cotton (42).
7. The oil-spinning device for an underwater pelletizer according to claim 6, characterized in that: A positioning rod (27) is provided on one side of the rear end cover (23) close to the oil storage shell (41), and a fastening nut (28) is threadedly connected to the positioning rod (27). The positioning rod (27) passes through the oil storage shell (41), and the fastening nut (28) presses the oil storage shell (41) onto the rear end cover (23).
8. The oil-spinning device for an underwater pelletizer according to claim 6, characterized in that: A sealing gasket (43) is installed on one side of the oil storage housing (41) close to the rear end cover (23).
9. The oil-spinning device for an underwater pelletizer according to claim 6, characterized in that: The oil storage shell (41) is provided with a plurality of limiting units (44), the limiting units (44) comprising a limiting rod installed on the oil storage shell (41) and a limiting plate installed at the end of the limiting rod, and the oil-absorbing cotton (42) is located between the oil storage shell (41) and the limiting plate.
10. The oil-spinning device for an underwater pelletizer according to claim 6, characterized in that: The oil storage shell (41) is provided with a spirally arranged observation groove (45), which diverges from the center of the oil storage shell (41) to the periphery of the oil storage shell (41), and a transparent observation plate (46) is installed at the observation groove (45).