An oil leak-proof structure and stirring device

Abstract

This utility model relates to the technical field of stirring devices, and discloses an oil-leakage-proof structure and stirring device applied to a stirring tank. It includes: a speed reducer mounting base connected to the stirring tank and having a through hole for accommodating a stirring shaft; an oil-throwing component sleeved on the stirring shaft; the oil-throwing component rotates synchronously with the stirring shaft to throw lubricating oil towards the inner wall of the speed reducer mounting base using centrifugal force; and an oil outlet hole opened on the wall surface of the speed reducer mounting base; the position of the oil outlet hole corresponds to the position of the oil-throwing component to guide and discharge the lubricating oil thrown towards the inner wall of the speed reducer mounting base, preventing oil from seeping downwards along the stirring shaft into the tank interior, effectively controlling the path of leaking oil. This oil-leakage-proof structure is widely applicable to various stirring scenarios with high cleanliness requirements, such as battery slurry preparation and fine chemical reactions, helping to improve equipment operational reliability and product quality stability.

Description

Technical Field

[0001] This utility model relates to the field of stirring device technology, and in particular to an oil-leakage-proof structure and stirring device. Background Technology

[0002] In continuous mixing processes such as battery production and chemical mixing, the mixing tank, as a core piece of equipment, typically transmits power through a speed reducer and agitator shaft. However, in actual use, the speed reducer and agitator shaft structure often suffer from lubricating oil leakage, especially during long-term operation or under high negative pressure environments.

[0003] If lubricating oil seeps into the mixing chamber through the axial clearance, it will not only contaminate the mixed materials, altering their physical or chemical properties, but may also lead to decreased product performance, batch scrapping, and consequently affect production line yield and cost control. Furthermore, oil leakage can cause surface contamination of equipment, increasing cleaning and maintenance burdens, and in severe cases, even requiring shutdown for repairs, reducing production efficiency. Therefore, how to effectively prevent lubricating oil leakage into the mixing tank without affecting normal transmission is a pressing technical problem that needs to be solved in this field.

[0004] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0005] This invention provides an oil-leakage-proof structure and a stirring device to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An oil leak-proof structure, applied to a mixing tank, includes:

[0008] The speed reducer mounting base is connected to the mixing tank and has a through hole to accommodate the mixing shaft;

[0009] An oil-throwing assembly is fitted onto the stirring shaft; the oil-throwing assembly rotates synchronously with the stirring shaft to throw lubricating oil toward the inner wall of the reducer mounting base by centrifugal force.

[0010] An oil outlet is provided on the wall of the gearbox mounting base; the position of the oil outlet corresponds to the position of the oil slinger assembly, so as to guide and discharge the lubricating oil slinged onto the inner wall of the gearbox mounting base.

[0011] Optionally, the oil slinger assembly includes a speed reducer oil slinger plate, which is disposed on the stirring shaft below the speed reducer and is used to sling out lubricating oil leaking from the speed reducer.

[0012] The oil outlet on the gearbox mounting base includes a gearbox oil outlet corresponding to the gearbox oil slinger.

[0013] Optionally, the reducer oil slinger is provided with a first sealing ring at the sleeve position of the stirring shaft, and the first sealing ring is tightly connected to the outer wall of the stirring shaft.

[0014] Optionally, the oil leakage prevention structure also includes a bearing for withstanding radial forces during the stirring process, the bearing being mounted on the stirring shaft and located outside the stirring tank.

[0015] Optionally, a bearing oil slinger is provided below the bearing, and the bearing oil slinger rotates synchronously with the stirring shaft to throw the lubricating oil leaking from the bearing to the outside of the equipment.

[0016] The oil outlet on the gearbox mounting base includes a bearing oil outlet corresponding to the bearing oil slinger.

[0017] Optionally, the bearing oil slinger is provided with a second sealing ring at the sleeve position of the stirring shaft, and the second sealing ring is tightly connected to the outer wall of the stirring shaft.

[0018] Optionally, at least one skeleton oil seal is provided below the bearing oil slinger.

[0019] Optionally, two skeleton oil seals are provided below the bearing oil slinger.

[0020] Optionally, the oil leakage prevention structure further includes a material throwing disc disposed on the stirring shaft, the material throwing disc being disposed adjacent to the skeleton oil seal;

[0021] The edge of the material throwing disc is inclined toward the mixing tank.

[0022] Optionally, the oil leakage prevention structure further includes an oil receiving box disposed on the stirring shaft, the oil receiving box being located on the path of the radial throwing direction of the throwing disc.

[0023] This utility model also provides a stirring device, including the oil leakage prevention structure as described in any of the preceding claims.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This invention provides an oil leakage prevention structure and stirring device. By installing a rotatable oil-throwing component on the stirring shaft and opening a corresponding oil outlet hole on the wall of the reducer mounting base, any leaking lubricating oil can be quickly thrown towards the reducer mounting wall and discharged outside the equipment under centrifugal force, preventing the oil from seeping downwards along the stirring shaft into the tank. This effectively controls the path of leaking oil. This oil leakage prevention structure is widely applicable to various stirring scenarios with high cleanliness requirements, such as battery slurry preparation and fine chemical reactions, helping to improve equipment operational reliability and product quality stability.

[0026] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of an oil leak prevention structure provided in an embodiment of the present invention;

[0029] Figure 2 yes Figure 1 A magnified view of the local structure.

[0030] Reference numerals: 10, mixing tank; 11, mixing shaft; 111, bearing; 112, shaft clamp; 20, reducer; 21, reducer mounting base; 31, reducer oil slinger; 311, reducer oil outlet; 312, first sealing ring; 32, bearing oil slinger; 321, bearing oil outlet; 322, second sealing ring; 33, skeleton oil seal; 34, material slinger; 35, oil receiving box. Detailed Implementation

[0031] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0032] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0033] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0034] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0035] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0036] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0037] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0038] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0039] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0040] During the operation of a mixing tank, lubricating oil leakage at the reducer and bearings has always been a key factor affecting mixing efficiency and product quality. In traditional mixing tanks, the reducer is connected to the mixing shaft. During operation, the lubricating oil inside the reducer is prone to leakage due to various reasons. When lubricating oil leaks, it flows downwards along the mixing shaft due to rotation and gravity. Simultaneously, the mixing tank typically requires negative pressure extraction and nitrogen injection during operation, creating a unique pressure environment inside. Bearings installed inside the mixing tank cover are constantly exposed to this environment, making their oil seals highly susceptible to damage, leading to oil leakage at the bearings as well. Once this leaked lubricating oil seeps into the mixing tank and mixes with the slurry, it severely contaminates the slurry and reduces product yield.

[0041] The present invention aims to provide an oil leakage prevention solution applicable to various stirring applications, such as stirring tanks used for mixing and preparing battery slurry.

[0042] The present invention will now be described in detail with reference to the accompanying drawings.

[0043] Please refer to the reference. Figure 1 , Figure 2 This utility model embodiment provides an oil leakage prevention structure applied to a mixing tank 10, comprising:

[0044] The reducer mounting base 21 is connected to the mixing tank 10 and has a through hole to accommodate the mixing shaft 11, providing an installation base and support for the entire oil leakage prevention structure.

[0045] An oil-throwing assembly is fitted onto the stirring shaft 11. The oil-throwing assembly rotates synchronously with the stirring shaft 11 to throw the lubricating oil toward the inner wall of the reducer mounting base 21 by centrifugal force. When the stirring shaft 11 rotates, the oil-throwing assembly rotates at high speed. According to the principle of centrifugal force, the lubricating oil will be thrown toward the inner wall of the reducer mounting base 21 under the action of centrifugal force.

[0046] An oil outlet is provided on the wall of the reducer mounting base 21; the position of the oil outlet corresponds to the position of the oil slinger assembly, so as to guide the lubricating oil slinged onto the inner wall of the reducer mounting base 21 to be discharged.

[0047] In this embodiment, a "prevention is worse than cure" approach is adopted. An oil-throwing component is installed on the stirring shaft 11. Centrifugal force is used to throw the lubricating oil onto the inner wall of the reducer mounting base 21. The thrown oil is then guided out of the equipment through an oil outlet hole located on the inner wall of the reducer mounting base 21, effectively preventing the lubricating oil from seeping downwards into the mixing tank 10. The oil discharge is achieved through a combination of rotating components and gravity. The structure is simple, easy to maintain, and effectively prevents oil contamination of the slurry, improving product yield.

[0048] In some possible implementations, the oil slinger assembly includes a reducer oil slinger 31, which is disposed on the stirring shaft 11 below the reducer 20 and is used to sling out lubricating oil leaking from the reducer 20. The oil outlet on the reducer mounting base 21 includes a reducer oil outlet 311 corresponding to the reducer oil slinger 31.

[0049] Understandably, by setting up the reducer oil slinger 31, which is positioned on the stirring shaft 11 below the reducer 20, and with its installation location close to the reducer 20 and rotating integrally with the stirring shaft 11, when the reducer 20 leaks lubricating oil, the oil spilled onto the disc surface will gain centrifugal force due to rotation. Since the reducer oil slinger 31 is in a horizontal or inclined state, the oil will move along the disc surface towards the edge under the action of centrifugal force. Thus, a centrifugal force path is formed as the reducer oil slinger 31 rotates, and the leaked lubricating oil can be promptly thrown away from the shaft center area.

[0050] Meanwhile, a suitable gap is maintained between the reducer oil slinger 31 and the inner wall of the reducer mounting base 21. When oil is thrown to the edge of the disc, it directly impacts the inner wall of the reducer mounting base 21. The oil outlet on the inner wall of the reducer mounting base 21 is located precisely at the position corresponding to the edge of the reducer oil slinger 31, which is equivalent to providing a "directional outlet" for the oil. This allows the oil that slides down the inner wall to flow precisely into the oil outlet and eventually be discharged outside the equipment. This ensures that the oil is promptly thrown away from the shaft area and discharged from the reducer oil outlet 311, avoiding axial seepage and lubricant accumulation.

[0051] In some possible implementations, in order to further prevent oil from seeping down the shaft surface, the reducer oil slinger 31 is provided with a first sealing ring 312 at the sleeve position of the stirring shaft 11. The first sealing ring 312 is tightly connected to the outer wall of the stirring shaft 11 to form an effective sealing barrier.

[0052] Because the first sealing ring 312 fits tightly against the outer wall of the shaft, it forms an effective sealing barrier, preventing oil from seeping into the lower structure due to gaps between the shafts. This further blocks the oil from seeping down the shaft surface and forces the oil to accumulate only in the disc area of ​​the oil slinger, further improving the guiding efficiency of centrifugal force on the oil.

[0053] Specifically, the first sealing ring 312 is an O-ring, which can be made of materials such as rubber or plastic. These materials have good elasticity and sealing performance, and can effectively prevent oil from seeping into the underlying structure due to gaps between the shafts.

[0054] Furthermore, to achieve centralized treatment and efficient management of oil spills, an external pipeline can be connected to the oil outlet. Therefore, when oil spills slide down the inner wall and directly enter the oil outlet, they can eventually be discharged through the external pipeline and collected in a predetermined collection container.

[0055] In the traditional design, the bearing 111 is installed inside the cover of the mixing tank 10. Because the mixing process requires operations such as drawing negative pressure and injecting nitrogen into the tank, the bearing 111 is more prone to oil leakage.

[0056] Therefore, in some possible implementations, the leak-proof structure also includes a bearing 111 for bearing the radial force during the stirring process, the bearing 111 being mounted on the stirring shaft 11 and located outside the stirring tank 10.

[0057] In this embodiment, by installing the bearing 111 outside the mixing tank 10, since the external bearing 111 does not come into contact with the material inside the tank, it avoids the oil seal damage and oil leakage caused by long-term operation in a negative pressure or nitrogen environment. The stable working environment is beneficial to extending the service life and reducing the risk of oil contamination.

[0058] In addition, the stirring shaft 11 is also provided with a shaft clip 112 that cooperates with the bearing 111. The shaft clip 112 is set on the outer wall of the stirring shaft 11 and is located on the opposite side of the bearing 111. It is used to form an axial limiting fit with the bearing 111 to prevent the bearing 111 from axially moving or displacing during operation, thereby ensuring the rotational accuracy and transmission stability of the stirring shaft 11.

[0059] In some possible implementations, a bearing oil slinger 32 is provided below the bearing 111, and the bearing oil slinger 32 rotates synchronously with the stirring shaft 11.

[0060] When there is a lubricating oil leak in bearing 111, the bearing oil slinger 32 can throw the leaked lubricating oil from bearing 111 to the outside of the equipment, thereby effectively guiding the oil outward and preventing it from seeping into the mixing chamber.

[0061] Correspondingly, the oil outlet on the reducer mounting base 21 includes a bearing oil outlet 321 corresponding to the bearing oil slinger 32.

[0062] The oil throwing logic of the bearing oil throwing plate 32 is the same as that of the reducer oil throwing plate 31. Its core lies in relying on centrifugal force drive and structural alignment. When the bearing 111 leaks lubricating oil, the oil will drip or flow onto the bearing oil throwing plate 32 below. Furthermore, the bearing oil throwing plate 32 rotates synchronously with the stirring shaft 11, so that the oil is subjected to centrifugal force when the plate rotates, and moves along the surface of the plate towards the edge, and is thrown onto the inner wall of the reducer mounting base 21.

[0063] Since the bearing oil outlet 321 is located on the inner wall corresponding to the edge of the bearing oil slinger 32, the oil that is slinged out can enter the oil outlet when it slides down the inner wall, thereby guiding the oil out of the equipment and preventing it from seeping down the shaft into the mixing tank 10.

[0064] In some possible implementations, to further seal off axially leaking oil, the bearing oil slinger 32 is provided with a second sealing ring 322 at the sleeve position of the stirring shaft 11. The second sealing ring 322 is tightly connected to the outer wall of the stirring shaft 11, improving the sealing performance of the oil slinger area and further sealing off axially leaking oil, thus enhancing oil isolation. The cooperation between the second sealing ring 322 and the shaft wall improves the sealing performance of the oil slinger area and enhances oil isolation.

[0065] Specifically, the second sealing ring 322 is an O-ring, which can be made of materials such as rubber or plastic.

[0066] In some possible implementations, to further improve sealing performance, at least one skeleton oil seal 33 is provided below the bearing oil slinger 32. By providing a skeleton oil seal 33 below the bearing oil slinger 32, the skeleton oil seal 33 has high-pressure sealing capability, and together with the sealing ring, it forms multiple protections, which can further ensure that oil does not enter the lower area, thereby improving the overall sealing performance.

[0067] More specifically, two skeleton oil seals 33 are provided below the bearing oil slinger 32. By setting the double skeleton oil seal 33 structure, the two oil seals form an intermediate buffer cavity, which helps to alleviate the impact of vacuum or positive pressure on the seal, providing double protection for high vacuum or complex environments, avoiding positive and negative pressure on the bearing 111, affecting the bearing 111's lifespan, and thus improving system stability.

[0068] When the mixing tank 10 is being mixed at high speed, the slurry inside may splash to the vicinity of the tank opening due to centrifugal force. If it enters the sealing area of ​​the bearing 111 or the oil slinger assembly and causes contamination, it will affect the performance of the lubricating oil and may even accelerate the wear of the components.

[0069] Based on this, in some possible implementations, the oil leakage prevention structure also includes a material throwing disc 34 disposed on the stirring shaft 11. The material throwing disc 34 is disposed adjacent to the skeleton oil seal 33 and close to the top of the mixing tank 10; the edge of the material throwing disc 34 is inclined towards the mixing tank 10.

[0070] The slurry spatter 34 serves two purposes: firstly, it can block the splashed slurry from entering the sealing area of ​​the bearing 111, forming a barrier against foreign matter in conjunction with the skeleton oil seal 33, thus preventing slurry backflow and contamination of the sealing system; secondly, the slurry spatter 34 can act as a last line of defense, preventing the lubricating oil above from entering the mixing tank 10.

[0071] In some possible implementations, the oil leakage prevention structure also includes an oil collection box 35 disposed on the stirring shaft 11. The oil collection box 35 is located on the path of the radial throwing direction of the throwing disc 34 to collect the material thrown from the throwing disc 34, which may include slurry splashed from the mixing tank 10 and lubricating oil flowing down from above.

[0072] With the combined action of the slurry throwing disc 34 and the oil receiving box 35, the inclined angle of the edge of the slurry throwing disc 34 can expand the interception range and guide the intercepted slurry to slide back into the tank along the disc surface, avoiding the accumulation of slurry on the slurry throwing disc 34, reducing the risk of foreign matter contaminating the sealing system, and thus more efficiently blocking the upward splashing slurry.

[0073] In addition, the inclined edge can use the combined effect of gravity and centrifugal force to guide the lubricating oil that drips or splashes onto the slurry plate away from the mixing tank (opposite to the direction of slurry flow), and finally be collected by the oil collection box, preventing the oil from crossing the slurry plate and entering the tank.

[0074] This bidirectional flow design directs splashed material back into the tank and guides leaking oil to the oil collection box, enabling the material discharge plate 34 to simultaneously perform the dual functions of "preventing material from rising" and "preventing oil from seeping down." This avoids slurry contamination of sealing components and prevents lubricating oil from seeping into the tank, further enhancing the reliability of the overall leak-proof system.

[0075] Based on the foregoing embodiments, this embodiment also provides a stirring device, including the oil leakage prevention structure as described above.

[0076] Specifically, the mixing device further includes a mixing tank, a mixing shaft, a reducer, and a drive motor. One end of the mixing shaft is connected to the output end of the reducer in the oil-proof structure, and the other end extends into the mixing tank to drive the mixing of slurry. The oil-proof structure is set between the mixing shaft and the mixing tank to prevent lubricating oil from the reducer and bearings from seeping into the mixing tank, so as to be suitable for a variety of mixing scenarios with high cleanliness requirements.

[0077] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of protection of this utility model. Any technical solutions resulting from equivalent structural or procedural substitutions or modifications made based on the essential concept of this application and utilizing the content described in the text and drawings of this application, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of protection of this utility model.

Claims

1. An oil leakage preventing structure characterized by comprising: Applications include: A speed reducer mounting base is used to install a speed reducer; the speed reducer mounting base is connected to the mixing tank and is provided with a through hole to accommodate the mixing shaft; An oil-throwing assembly is fitted onto the stirring shaft; the oil-throwing assembly rotates synchronously with the stirring shaft to throw lubricating oil toward the inner wall of the reducer mounting base by centrifugal force. An oil outlet is provided on the wall of the gearbox mounting base; the position of the oil outlet corresponds to the position of the oil slinger assembly, so as to guide and discharge the lubricating oil slinged onto the inner wall of the gearbox mounting base.

2. The oil leakage preventing structure according to claim 1, characterized by The oil slinger assembly includes a speed reducer oil slinger plate, which is mounted on the stirring shaft below the speed reducer and is used to sling out lubricating oil leaking from the speed reducer. The oil outlet on the gearbox mounting base includes a gearbox oil outlet corresponding to the gearbox oil slinger.

3. The oil leakage preventing structure according to claim 2, characterized by The reducer oil slinger is provided with a first sealing ring at the sleeve position of the stirring shaft, and the first sealing ring is tightly connected to the outer wall of the stirring shaft.

4. The oil leakage preventing structure according to claim 1, characterized by It also includes a bearing for bearing the radial force during the stirring process, the bearing being mounted on the stirring shaft and located outside the stirring tank.

5. The oil leakage preventing structure according to claim 4, characterized by Below the bearing is a bearing oil slinger, which rotates synchronously with the stirring shaft to throw the lubricating oil leaking from the bearing to the outside of the equipment. The oil outlet on the gearbox mounting base includes a bearing oil outlet corresponding to the bearing oil slinger.

6. The oil leakage preventing structure according to claim 5, characterized by The bearing oil slinger is provided with a second sealing ring at the sleeve position of the stirring shaft, and the second sealing ring is tightly connected to the outer wall of the stirring shaft.

7. The oil leakage preventing structure according to claim 5 or 6, characterized by At least one skeleton oil seal is provided below the bearing oil slinger.

8. The oil leakage preventing structure according to claim 7, characterized by It also includes a material throwing disc disposed on the stirring shaft, the material throwing disc being disposed adjacent to the skeleton oil seal; The edge of the material throwing disc is inclined toward the mixing tank.

9. The oil leakage preventing structure according to claim 8, characterized by It also includes an oil receiving box located on the stirring shaft, the oil receiving box being situated on the path of the radial discharge direction of the discharge disc.

10. A stirring device, characterized by Including the oil leak prevention structure as described in any one of claims 1 to 9.

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