Multifunctional sealing structure of vertical speed reducer
By adopting a three-layer sealing unit and an oil leakage warning system in the vertical reducer, the problem of poor sealing performance is solved, efficient sealing and rapid leakage source location are achieved, and equipment maintenance costs and downtime are reduced.
Patent Information
- Application Number
- CN202422886279.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-25
AI Technical Summary
The existing vertical reducer has poor sealing performance at the lower end, which causes lubricating oil leakage, affecting equipment operation and increasing maintenance costs.
A three-layer sealing unit structure is adopted, including the first sealing unit (O-ring), the second sealing unit (double-skeleton oil seal) and the third sealing unit (grease seal). The first sealing unit is set at the intersection of the sleeve, bearing and output shaft, the second sealing unit is set between the oil guide part and the end cover, and the third sealing unit is set between the end cover and the lower part of the sleeve. The sealing early warning is realized in combination with the oil leakage storage area and the oil leakage pipeline.
Significantly improve sealing performance and reliability, reduce the possibility of leakage, extend maintenance cycles, reduce downtime and repair costs, and quickly find the source of leakage through oil leakage warning and oil return systems.
Smart Images
Figure CN223387939U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vertical reducers, in particular to a multifunctional sealing structure of a vertical reducer. Background Art
[0002] In vertical reducer designs, the shaft is typically arranged vertically, with bearings located at the top and bottom ends. To ensure good sealing performance, an end cap is typically installed at the bottom of the lower bearing. A common sealing structure for this end cap is a double-layer skeleton oil seal. Under ideal processing conditions, this simple structure can meet basic sealing requirements and effectively prevent lubricant leakage.
[0003] However, in actual processing, due to the relatively thin thickness of the sleeve, existing processes cannot guarantee complete machining accuracy. The sleeve is prone to coaxiality and roundness deviations, which in turn leads to sleeve deformation. This deformation increases the clearance between the sleeve and the output shaft. During reducer operation, the increased clearance causes lubricating oil to leak through the gap, causing oil leakage. Oil leakage not only reduces the sealing performance of the equipment but can also adversely affect its normal operation. More seriously, once oil leakage occurs, the machine usually needs to be shut down for disassembly and inspection, and the seals must be replaced. This process not only affects production efficiency but also leads to high maintenance costs. Utility Model Content
[0004] The utility model aims to provide a multifunctional sealing structure of a vertical reducer to solve the problem of poor sealing performance of the lower end of the existing vertical reducer.
[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a multifunctional sealing structure of a vertical reducer, comprising a sleeve and an end cover sleeved on the outer periphery of the output shaft, the end cover bolted to the lower end of the housing, a bearing provided between the housing and the output shaft, a first sealing unit provided at the intersection of the sleeve, the inner ring of the bearing and the output shaft, a middle portion of the sleeve radially protruding outward to form an oil guide portion, a second sealing unit provided between the oil guide portion and the end cover, a third sealing unit provided at the lower portion of the end cover and the sleeve, the third sealing unit including a grease storage area filled with grease.
[0006] The principles and advantages of this solution are: in this solution, three layers of sealing units are provided between the output shaft, the sleeve, the housing and the end cover, wherein the first sealing unit is provided at the intersection of the sleeve, the inner ring of the bearing and the output shaft, effectively preventing the lubricating oil from leaking from the gap between the sleeve and the output shaft due to deformation of the sleeve processing accuracy; the second sealing unit is located between the oil guide part and the end cover as the main seal; the third sealing unit is a grease seal; when there is oil leakage in the second sealing unit, the third sealing unit performs auxiliary sealing on the second sealing unit to prevent the oil from leaking to the outside of the end cover and causing the overall failure of the sealing structure.
[0007] In this solution, the first to third sealing units are sequentially located in the upper, middle, and lower parts of the shaft sleeve and are radially staggered, creating a crisscrossing, multi-stage sealing layout within the seal structure. This effectively blocks oil penetration paths and reduces the possibility of leakage. Even if a sealing unit fails, subsequent sealing units can continue to function, significantly improving the overall sealing effect and reliability. This also effectively extends maintenance cycles and reduces downtime and maintenance costs. Secondly, the third sealing unit utilizes a grease seal, which not only effectively blocks lubricant leakage but also, in dynamic sealing, allows the grease to be redistributed as the moving parts move, providing a continuous sealing effect.
[0008] Furthermore, a sealing warning unit is provided on the end cover, which is located between the second sealing unit and the third sealing unit, and includes an oil leakage storage area and an oil leakage pipeline, which are connected to each other, and the oil leakage pipeline is externally connected to an oil leakage joint.
[0009] Furthermore, the shaft sleeve, bearing, end cover and housing form an oil return storage area, and an oil return joint is installed in the end cover. The oil return joint is connected to the oil return storage area and is externally connected to the oil tank.
[0010] Furthermore, a grease injection pipeline communicating with the grease storage area is opened in the end cover, and a grease injection joint is externally connected to the grease injection pipeline.
[0011] Furthermore, the second sealing unit is a double-skeleton oil seal, and a step portion for placing the double-skeleton oil seal is opened on the end cover, and the step portion is located between the double-skeleton oil seal and the oil return storage area.
[0012] Furthermore, the first sealing unit is an O-ring, and a sealing groove for accommodating the O-ring is formed at the top of the sleeve.
[0013] Furthermore, the lower end of the oil guide portion protrudes downward to form an oil blocking ring, the cross section of which is a trapezoid with a larger upper portion and a smaller lower portion. The upper portion of the inner end of the end cover extends between the shaft sleeve and the oil blocking ring with a gap left between the two.
[0014] Furthermore, a set screw is provided at the bottom of the sleeve.
[0015] This solution also has the following beneficial effects:
[0016] 1. Enhanced sealing performance: The sealing warning unit includes an oil leakage storage area and an oil leakage pipeline, and is located below the second sealing unit. When there is a small amount of oil leakage at the double-skeleton oil seal, the oil leakage pipeline can be used as a layer of seal to collect a small amount of lubricating oil to prevent the lubricating oil from leaking out of the end cover; in this way, the entire sealing structure has four layers of seals, namely the first, second, and third sealing units and the oil leakage pipeline. Compared with the commonly used sealing structure in the prior art, the number of sealing layers is increased and the sealing performance is significantly enhanced. Moreover, in this solution, the return oil storage area, the oil leakage storage area and the grease storage area are three sealing areas, all of which have oil storage sealing functions. The entire sealing structure effectively enhances the sealing effect and prevents leakage through the structural form of three sealing areas and four layers of sealing.
[0017] 2. Oil leakage warning: The oil leakage storage area of the sealing warning unit can store the oil leaked from the double skeleton oil seal and then discharge it through the oil leakage joint. The presence of oil in the sealing warning unit indicates that the double skeleton oil seal has oil leakage, which not only realizes oil leakage warning but also extends the replacement cycle of the double skeleton oil seal. In addition, when there is oil in the grease injection pipeline and grease injection joint connected to the third sealing unit, it also indicates that the double skeleton oil seal has oil leakage, which can realize oil leakage warning, so that maintenance personnel can discover and deal with oil leakage problems in time, reduce the wear of the internal structure of the reducer due to insufficient lubricating oil, effectively extend the service life of the equipment, and also reduce the downtime caused by equipment failure, thereby improving production efficiency.
[0018] 3. Leakage source identification: In this solution, by disassembling the oil drain joint and the grease injection joint and observing the gap between the sleeve and the output shaft, it is possible to reversely identify whether there is oil leakage in the sealing structure and determine the source of the leakage. If there is oil leakage only at the oil drain joint, it means that there is leakage at the double skeleton oil seal and it needs to be repaired, while the grease seal of the third sealing unit is still effective. If there is oil leakage at both the oil drain joint and the grease injection joint, both the second and third sealing units need to be repaired and replaced. This solution enables maintenance personnel to quickly and accurately determine the source of the leakage, effectively reducing the difficulty and time of maintenance.
[0019] 4. Lubricating oil flow: In this solution, the return oil storage area stores the lubricating oil of the bearing, and then connects it to the external oil tank through the return oil joint, and pumps the return oil back into the reducer to achieve oil flow. In addition, the lubricating oil can take away the heat generated by the moving parts during the flow, help dissipate heat, and keep the mechanical parts working within the normal temperature range. In addition, the lubricating oil can also take away metal chips, dust and other impurities on the surface of gears, bearings and other components during the flow, keeping the mechanical parts clean. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.
[0021] Figure 2 for Figure 1A partial enlarged view of part A.
[0022] Figure 3 for Figure 1 A partial enlarged view of part B. DETAILED DESCRIPTION
[0023] The following is further described in detail through specific implementation methods:
[0024] The figure marks in the drawings of the specification include: output shaft 100, bearing 200, housing 300, sleeve 1, oil guide part 2, oil blocking ring 3, end cover 4, step part 5, first sealing unit 6, O-ring 61, second sealing unit 7, double skeleton oil seal 71, third sealing unit 8, grease storage area 81, grease injection pipeline 82, grease injection joint 83, sealing early warning unit 9, oil leakage storage area 91, oil leakage pipeline 92, oil leakage joint 93, return oil storage area 10, return oil joint 11, set screw 12, bolt 13.
[0025] The embodiment is basically as shown in the attached Figure 1-Figure 3 As shown:
[0026] A multifunctional sealing structure of a vertical reducer includes a sleeve 1 and an end cover 4 sleeved on the outer circumference of an output shaft 100, a set screw 12 is provided at the bottom of the sleeve 1, and the end cover 4 is fixed to the lower end of a housing 300 by a bolt 13, a bearing 200 is provided between the housing 300 and the output shaft 100, and a first sealing unit 6, a second sealing unit 7, a third sealing unit 8 and a sealing warning unit 9 are provided between the output shaft 100, the sleeve 1, the bearing 200, the end cover 4 and the housing 300.
[0027] Combine Figure 1 、 Figure 2As shown, specifically, a first sealing unit 6 is provided at the intersection of the sleeve 1, the inner ring of the bearing 200 and the output shaft 100. The first sealing unit 6 is an O-ring 61. A sealing groove for accommodating the O-ring 61 is provided at the top of the sleeve 1. The upper and lower sides of the O-ring 61 are respectively tightly attached to the sleeve 1 and the inner ring of the bearing 200, effectively preventing the lubricating oil from leaking from the gap between the sleeve 1 and the output shaft 100 due to deformation of the machining accuracy of the sleeve 1; the middle part of the sleeve 1 radially protrudes outward to form an oil guide portion 2, the end cover 4 is provided with a step portion 5, and a second sealing unit 7 is provided between the oil guide portion 2 and the step portion 5. The second sealing unit 7 is a double-skeleton oil seal 71. The sealing lip of the double-skeleton oil seal 71 is tightly attached to the oil guide part 2, and the other side is tightly attached to the step part 5, so as to realize the sealing between the end cover 4 and the shaft sleeve 1; the end cover 4 and the lower part of the shaft sleeve 1 are provided with a third sealing unit 8, and the third sealing unit 8 includes a grease storage area 81. The grease storage area 81 is surrounded by the shaft sleeve 1 and the end cover 4. The grease storage area 81 is filled with grease. A grease injection pipeline 82 connected to the grease storage area 81 is opened in the end cover 4, and the grease injection pipeline 82 is connected to the outside of the grease injection joint 83. Grease is replenished to the grease storage area 81 through the grease injection head and the grease injection pipeline 82 to ensure the sealing of the grease seal.
[0028] Through the above-mentioned arrangement, in this solution, the first sealing unit 6, the second sealing unit 7, and the third sealing unit 8 are sequentially distributed in the upper, middle, and lower parts of the shaft sleeve 1, and are staggered in the radial direction, so that the sealing structure forms a criss-cross multi-stage sealing layout in space, effectively blocking the penetration path of the medium and reducing the possibility of leakage. Even if a sealing unit fails, the subsequent sealing units can still continue to function, thereby significantly improving the overall sealing effect and reliability, and effectively extending the maintenance cycle, reducing downtime and maintenance costs.
[0029] Combine Figure 3 As shown, preferably, a sealing warning unit 9 is provided on the end cover 4, which is located between the second sealing unit 7 and the third sealing unit 8, and includes an oil leakage storage area 91 and an oil leakage pipeline 92, which are connected, and the oil leakage pipeline 92 is externally connected to an oil leakage joint 93. When a small amount of oil leakage occurs at the double-skeleton oil seal 71, the oil leakage pipeline 92 can be used as a layer of seal to collect a small amount of lubricating oil to prevent the lubricating oil from leaking out of the end cover 4; on the other hand, the oil leakage storage area 91 can store the oil leaked from the double-skeleton oil seal 71 and then discharge it through the oil leakage joint 93. If there is oil in the sealing warning unit 9, it means that the double-skeleton oil seal 71 has an oil leakage situation, thereby realizing oil leakage warning; combined with Figure 2 As shown, the lower end of the oil guide portion 2 protrudes downward to form an oil-blocking ring 3. The cross-section of the oil-blocking ring 3 is a trapezoid with a larger upper portion and a smaller lower portion. The upper portion of the inner end of the end cover 4 extends between the shaft sleeve 1 and the oil-blocking ring 3 with a gap left between the two. This effectively extends the oil leakage path. The oil-blocking ring 3 blocks the oil in the oil leakage storage area 91, reduces the amount of oil seeping into the fat storage area 81, and reduces the risk of oil leakage there.
[0030] Combine Figure 3 As shown, the shaft sleeve 1, the bearing 200 and the end cover 4 and the housing 300 form an oil return storage area 10, and an oil return joint 11 is installed in the end cover 4, which is connected to the oil return storage area 10 and externally connected to the oil tank; the oil return storage area 10 stores the lubricating oil of the bearing 200, and is connected to the external oil tank through the oil return joint 11, and the return oil is pumped back into the reducer to realize the flow of oil. In addition, during the flow process, the lubricating oil can not only take away the heat generated by the moving parts and help dissipate heat, but also take away metal chips, dust and other impurities on the surface of components such as gears and bearings 200, so as to keep the mechanical components clean.
[0031] The sealing structure of this solution has four layers of sealing, namely the first, second and third sealing units 8 and the oil drain line 92, as well as the return oil storage area 10, the oil drain storage area 91 and the grease storage area 81 as three sealing areas. Compared with the commonly used sealing structures in the prior art, the number of sealing layers is increased and the sealing performance is significantly enhanced. Moreover, this solution can realize leakage warning and reversely check whether the sealing structure has oil leakage by disassembling the oil drain joint 93 and the grease injection joint 83 and observing the gap between the sleeve 1 and the output shaft 100, thereby clarifying the source of the leakage and enabling maintenance personnel to determine the source of the leakage in a timely, rapid and accurate manner, effectively reducing the difficulty and time of maintenance. In summary, compared with the commonly used sealing structure, this solution adopts a four-layer seal and three sealing area structure, so that the sealing structure of this solution has multiple functions such as anti-leakage, early warning and reverse rapid search for leakage sources.
[0032] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A multifunctional sealing structure for a vertical reducer, comprising a sleeve and an end cover mounted on the outer periphery of an output shaft, the end cover being bolted to the lower end of a housing, and a bearing being provided between the housing and the output shaft, characterized in that: A first sealing unit is provided at the intersection of the sleeve, the inner ring of the bearing and the output shaft. The middle part of the sleeve protrudes radially outward to form an oil guide part. A second sealing unit is provided between the oil guide part and the end cover. A third sealing unit is provided at the lower part of the end cover and the sleeve. The third sealing unit includes a grease storage area filled with grease.
2. The multifunctional sealing structure of a vertical reducer according to claim 1, characterized in that: The end cover is provided with a sealing early warning unit, which is located between the second sealing unit and the third sealing unit, and includes an oil leakage storage area and an oil leakage pipeline, which are connected to each other, and the oil leakage pipeline is externally connected to an oil leakage joint.
3. The multifunctional sealing structure of a vertical reducer according to claim 2, characterized in that: An oil return storage area is formed between the shaft sleeve, the bearing, the end cover and the box body. An oil return joint is installed in the end cover. The oil return joint is connected to the oil return storage area and is externally connected to the oil tank.
4. The multifunctional sealing structure of a vertical reducer according to claim 3, characterized in that: A grease injection pipeline communicating with the grease storage area is provided inside the end cover, and a grease injection joint is externally connected to the grease injection pipeline.
5. The multifunctional sealing structure of a vertical reducer according to claim 4, characterized in that: The second sealing unit is a double-skeleton oil seal. A step portion for placing the double-skeleton oil seal is opened on the end cover, and the step portion is located between the double-skeleton oil seal and the oil return storage area.
6. The multifunctional sealing structure of a vertical reducer according to claim 5, characterized in that: The first sealing unit is an O-type sealing ring, and a sealing groove for accommodating the O-type sealing ring is opened on the top of the sleeve.
7. The multifunctional sealing structure of a vertical reducer according to claim 6, characterized in that: The lower end of the oil guide portion protrudes downward to form an oil blocking ring. The cross section of the oil blocking ring is a trapezoid with a larger upper portion and a smaller lower portion. The upper portion of the inner end of the end cover extends between the shaft sleeve and the oil blocking ring with a gap left between the two.
8. The multifunctional sealing structure of a vertical reducer according to claim 7, characterized in that: A set screw is provided at the bottom of the shaft sleeve.