A discontinuous screw sealing mechanism and sealing system

Abstract

The application discloses a non-continuous spiral sealing mechanism and a sealing system. The non-continuous spiral sealing mechanism comprises a first supporting unit and a plurality of first sealing units. The first supporting unit is a ring skeleton structure, and the first sealing units are arranged in a spiral manner along the inner side of the first supporting unit. The spiral inclination direction of the first sealing units is consistent with the rotation direction of the main shaft during operation. The ends of the first sealing units abut against the main shaft. Two first sealing units are parallel to each other and form a plurality of oil guide channels. During operation of the main shaft, the oil guide channels generate a pumping effect, which can guide and return the lubricating medium, which seeps out from the ends of the first sealing units or enters the oil guide channels from the opening area, into the equipment oil cavity, thereby avoiding the outward leakage of the lubricating medium and effectively improving the sealing reliability. The sealing system is composed of at least one single-lip sealing mechanism and a non-continuous spiral sealing mechanism, and can realize double sealing functions, and further improve the sealing performance and operation reliability.

Description

Technical Field

[0001] This application relates to the field of sealing technology, and in particular to a discontinuous spiral sealing mechanism and sealing system. Background Technology

[0002] Bearing lubrication is a major concern, especially in wind turbine generator sets. The main shaft bearing sealing system is a crucial structure for ensuring the continuous and stable operation of wind turbine generator sets. Its main function is to prevent leakage of lubricating media (such as lubricating oil and grease) to ensure that the main shaft bearing operates in a good lubrication environment for a long period of time. However, in existing technologies, common oil seals mainly rely on line contact between a single lip and the main shaft to achieve sealing, using radial contact pressure to seal the lubricating media, which cannot completely and effectively seal the seal. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. This application provides a discontinuous spiral sealing mechanism and sealing system, which can significantly improve the sealing performance of the sealing system and extend its service life.

[0004] The discontinuous spiral sealing mechanism according to a first aspect embodiment of this application includes: First support unit; Multiple first sealing units are spirally arranged inside the first support unit, and the first sealing units are parallel to each other and form an oil guiding channel.

[0005] The discontinuous spiral sealing mechanism according to the embodiments of this application has at least the following beneficial effects: The discontinuous spiral sealing mechanism of this application includes a first support unit and multiple first sealing units. The first support unit is a ring-shaped skeleton structure, and the first sealing units are spirally arranged along the inner side of the first support unit. One end of each first sealing unit is fixed to the inner wall of the first support unit, and the other end is the end. The discontinuous spiral sealing mechanism is sleeved around the outside of the main shaft. The spiral inclination direction of the first sealing units is consistent with the rotation direction of the main shaft during operation, and the end of each first sealing unit abuts against the main shaft. Each pair of first sealing units is parallel to each other, thus forming several oil guiding channels between adjacent first sealing units. During the rotation of the main shaft, the oil guiding channels located between the first sealing units generate a pumping effect under the shear force of the main shaft rotation. This pumping effect guides and returns the lubricating medium that seeps from the end of the first sealing unit or enters the oil guiding channel from the opening area back to the oil chamber of the equipment, thereby preventing the lubricating medium from leaking out. Simultaneously, the end of the first sealing unit abuts against the outer surface of the main shaft, effectively improving the reliability of the seal.

[0006] According to some embodiments of this application, the helical tilt angle of the first sealing unit is less than or equal to 20°.

[0007] According to some embodiments of this application, the thickness of the first sealing unit is 1 mm to 1.5 mm.

[0008] According to some embodiments of this application, the spacing between adjacent first sealing units is 10 mm.

[0009] A sealing system according to a second aspect of this application includes the discontinuous spiral sealing mechanism of the above embodiments, and the sealing system further includes: A single-lip sealing mechanism includes a second support unit and a second sealing unit connected to the second support unit. The second sealing unit is inclined to the axial direction of the single-lip sealing mechanism, and the thickness of the second sealing unit gradually decreases from a position close to the second support unit to a position far away from the second support unit. The single-lip sealing mechanism and the discontinuous spiral sealing mechanism are stacked and detachably connected by the first support unit and the second support unit.

[0010] According to some embodiments of this application, the first support unit is provided with a recessed portion, and the second support unit is provided with a protrusion that cooperates with the recessed portion.

[0011] According to some embodiments of this application, a plurality of the single-lip sealing mechanisms are included, each of the single-lip sealing mechanisms being stacked and detachably connected via adjacent second support units.

[0012] According to some embodiments of this application, it also includes a main shaft, the single-lip sealing mechanism and the discontinuous spiral sealing mechanism are sleeved on the outside of the main shaft, and the ends of the first sealing unit and the second sealing unit abut against the main shaft to form a seal.

[0013] According to some embodiments of this application, the spindle is provided with a groove for receiving a lubricating medium.

[0014] According to some embodiments of this application, a fixing component and an end cap are also included. The end cap is provided with a mounting portion, and the fixing component forms a clamping structure with the end cap to fix the discontinuous spiral sealing mechanism and the single-lip sealing mechanism on the mounting portion. Attached Figure Description

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of a discontinuous spiral sealing mechanism according to an embodiment of this application; Figure 2for Figure 1 Another structural diagram; Figure 3 for Figure 2 A cross-sectional view of surface AA; Figure 4 for Figure 3 An enlarged schematic diagram of part I; Figure 5 for Figure 3 An enlarged schematic diagram of Part II; Figure 6 This is a schematic diagram of a combined structure of a single-lip sealing mechanism and a discontinuous spiral sealing mechanism according to an embodiment of this application; Figure 7 for Figure 6 Another structural diagram; Figure 8 This is a schematic diagram of a combination structure of a single-lip sealing mechanism and a discontinuous spiral sealing mechanism according to an embodiment of this application; Figure 9 for Figure 7 A cross-sectional view of the BB side; Figure 10 This is a schematic diagram of two single-lip sealing mechanisms and a discontinuous spiral sealing mechanism before assembly, according to an embodiment of this application. Figure 11 This is a schematic diagram of the assembled two single-lip sealing mechanisms and one discontinuous spiral sealing mechanism according to an embodiment of this application. Figure 12 This is a schematic diagram of the structure of a sealing system according to an embodiment of this application.

[0016] Figure label: Discontinuous spiral sealing mechanism 1; first support unit 11; first sealing unit 12; first sealing unit end 121; oil guide channel 13; opening area 14; Single-lip sealing mechanism 2; second support unit 21; second sealing unit 22; transition portion 221; first extension portion 222; end of second sealing unit 223; second extension portion 224; flexible steel wire 23; elastic component 24; Protrusion 31; Recess 32; Main spindle 4; Groove 41; End cap 5; Fixed component 6. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0018] In the description of this application, it should be understood that the use of terms such as "center," "middle," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0020] The following reference Figures 1 to 12 This application describes a discontinuous spiral sealing mechanism and sealing system in the embodiments of the present application.

[0021] according to Figures 1 to 5As shown, an embodiment of the discontinuous spiral sealing mechanism 1 of this application includes a first support unit 11 and a plurality of first sealing units 12. The first support unit 11 is a ring-shaped skeleton structure, and the first sealing units 12 are arranged spirally along the inner side of the first support unit 11. One end of each first sealing unit 12 is fixed to the inner wall of the first support unit 11, and the other end is the end. The discontinuous spiral sealing mechanism 1 is sleeved around the outer side of the main shaft 4. The spiral inclination direction of the first sealing units 12 is consistent with the rotation direction of the main shaft 4 during operation, and the end 121 of each first sealing unit abuts against the main shaft 4. The first sealing units 12 are parallel to each other, thereby forming an oil guiding channel 13 between adjacent first sealing units 12. The formed oil guiding channel 13 extends at a certain inclination angle in the axial direction of the main shaft 4. The oil guiding channel 13 and the first support unit 11 together constitute a pumping passage.

[0022] During the rotation of the main shaft 4, the rotation direction of the main shaft 4 is consistent with the helical direction of the first sealing unit 12. Under the action of the rotational shear force of the main shaft 4, the oil guide channel 13 between adjacent first sealing units 12 generates a pumping effect. The pumping effect can guide and return the lubricating medium that seeps out from the end 121 of the first sealing unit or enters the oil guide channel 13 from the opening area 14 to the oil chamber of the equipment, thereby preventing the lubricating medium from leaking outward. This realizes the active return and reuse of the lubricating medium during operation, which not only improves the overall sealing effect but also reduces the loss of lubricating medium and extends the service life of the equipment. At the same time, the end 121 of the first sealing unit abuts against the outer surface of the main shaft 4, effectively improving the reliability of the seal.

[0023] In some embodiments, the discontinuous spiral sealing mechanism 1 is made of polyurethane material, which is easy to process.

[0024] according to Figures 1 to 5 As shown, in one embodiment of this application, the first sealing unit 12 in the discontinuous spiral sealing mechanism 1 is spirally arranged relative to the main shaft 4. See details [link to specific details]. Figure 5 The angle of the spiral tilt of the first sealing unit 12 is . , This allows the oil guide channel 13 to form a longer stroke in the axial direction. During this stroke, the lubricating medium is subjected to the combined action of rotational shear force and helical guiding force, thereby being effectively pumped back to the equipment oil chamber. The smaller the angle, the longer the stroke of the oil guide channel 13.

[0025] In some preferred embodiments, when At the same time, it ensures the pumping capacity of the oil guide channel 13, meets the minimum stroke required by the lubricating medium during the pumping process, and can take into account both sealing stability and pumping effect at the contact interface between the discontinuous spiral sealing mechanism 1 and the main shaft 4, so that the lubricating medium can still maintain effective backflow at high speed, thereby improving the overall sealing performance and service life.

[0026] according to Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in one embodiment of this application, the thickness of the first sealing unit 12 is d. Controlling d between 1mm and 1.5mm can maintain the sealing performance while avoiding excessive heat generation caused by excessive friction between the end 121 of the first sealing unit and the main shaft 4 due to excessive thickness.

[0027] In some preferred embodiments, the thickness d of the first sealing unit 12 is set to 1 mm. When the spindle 4 rotates, the first sealing unit 12 with a thickness d of 1 mm can maintain sufficient elastic deformation to form a stable sealing contact during the process of contacting with the outer surface of the spindle 4, and will not generate excessive radial clamping force due to excessive thickness, thereby reducing frictional heat generation. It can balance sealing strength and operational stability, so that the discontinuous spiral sealing mechanism 1 can effectively prevent lubricating medium leakage during long-term operation, and reduce energy loss and wear rate of the first sealing unit 12, thereby improving the sealing life.

[0028] In some other embodiments, the thickness d of the first sealing unit 12 is set to 1.5 mm. It is understood that the larger the thickness d, the more heat will be generated at the end 121 of the first sealing unit during operation.

[0029] according to Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in one embodiment of this application, the spacing between adjacent first sealing units 12 is D, that is, the width of the oil guide channel 13 is also D. D is set to 10mm, which can ensure that the width of the oil guide channel 13 is moderate, neither too narrow to cause blockage of the lubricating medium, nor too wide to weaken the sealing performance. This ensures that the distribution between each oil guide channel 13 is uniform, so that the entire discontinuous spiral sealing mechanism 1 can form multiple parallel return paths, thereby improving the return efficiency of the lubricating medium.

[0030] according to Figures 6 to 9 As shown, a sealing system according to one embodiment of this application includes the discontinuous spiral sealing mechanism 1 of the above embodiment, and the sealing system also includes a single-lip sealing mechanism 2.

[0031] The single-lip sealing mechanism 2 includes a second support unit 21 and a second sealing unit 22. The second support unit 21 is a ring-shaped skeleton structure, and the second sealing unit 22 is disposed inside the second support unit 21. One end of the second sealing unit 22 is fixed to the inner wall of the second support unit 21, and the other end is the end cap. The single-lip sealing mechanism 2 is sleeved around the outside of the main shaft 4, and the end cap 223 of the second sealing unit abuts against the main shaft 4 to block the lubricating medium and form a sealing effect.

[0032] The radial cross section of the second support unit 21 is approximately rectangular. The second sealing unit 22 is inclined to the axial direction of the single-lip sealing mechanism 2, that is, the extension direction of the second sealing unit 22 is at an angle to the extension direction of the second support unit 21, thus forming an elevation angle between the second sealing unit 22 and the second support unit 21.

[0033] The thickness of the second sealing unit 22 gradually decreases from the position close to the second support unit 21 to the position far away from the second support unit 21.

[0034] The single-lip sealing mechanism 2 and the discontinuous spiral sealing mechanism 1 are stacked and detachably connected by the first support unit 11 and the second support unit 21. The discontinuous spiral sealing mechanism 1 mainly serves to seal the backflow of the lubricating medium. The single-lip sealing mechanism 2 not only prevents a small amount of lubricating medium that has broken through the discontinuous spiral sealing mechanism 1 from leaking to the outside, but also prevents external foreign objects (such as water, dust and other impurities) from entering the sealing system.

[0035] During the rotation of the main shaft 4, the oil guide channel 13 of the non-continuous spiral sealing mechanism 1 generates a pumping effect, which sends the seeping lubricating medium back to the oil chamber; at the same time, the single-lip sealing mechanism 2 plays a secondary role in preventing leakage by tightly fitting the second sealing unit 22 with the main shaft 4.

[0036] The sealing system of this application combines a discontinuous spiral sealing mechanism 1 with a single-lip sealing mechanism 2 to achieve dual sealing functions, thereby significantly improving the overall sealing performance and operational reliability.

[0037] In some embodiments, see Figure 8The outer wall of the second sealing unit 22 includes a transition portion 221, a first extension portion 222, a second sealing unit end portion 223, and a second extension portion 224. The first extension portion 222 is located on the side facing the second sealing unit 22 at its elevation angle, and the second extension portion 224 is located on the side facing away from the second sealing unit 22 at its elevation angle. Thus, the first extension portion 222 and the second extension portion 224 are located on opposite sides of the second sealing unit 22. The deformation capability of the second sealing unit 22 is positively correlated with its length. Both the first extension portion 222 and the second extension portion 224 have a certain length, ensuring that the second sealing unit 22 also has a certain radial length. This allows the second sealing unit 22 to deform to a certain extent during its contact with the main shaft 4, facilitating the sealing fit between the second sealing unit end portion 223 and the main shaft 4. The first extension portion 222 connects to the second support unit 21 through the transition portion 221, and the second extension portion 224 also connects to the second support unit 21. The end 223 of the second sealing unit is located away from the second support unit 21 and connects to the first extension 222 and the second extension 224. Specifically, the first extension 222 and the second extension 224 are straight, defining the thickness of the second sealing unit 22, which is less than the thickness of the second support unit 21. The transition portion 221 is arc-shaped and forms a rounded corner at the connection between the second support unit 21 and the second sealing unit 22. The arc-shaped transition portion 221 can distribute stress more evenly when under force, reducing local stress concentration and helping to reduce the risk of damage to the second sealing unit 22 due to uneven stress, thus improving the reliability and durability of the seal. At the same time, the arc-shaped transition portion 221 allows the second sealing unit 22 to better adapt to the slight eccentricity or jumping movement of the main shaft 4, thereby maintaining stable contact between the second sealing unit 22 and the main shaft 4 and reducing the possibility of oil leakage. In addition, the arc-shaped transition portion 221 can increase the vulcanization contact area of ​​the second support unit 21 and the second sealing unit 22, improving the pass rate and stability of the single-lip sealing mechanism 2.

[0038] In some embodiments, see Figure 8The second sealing unit 22 also includes an elastic member 24, which covers the first extension 222, i.e., is located on the side facing the second sealing unit 22 at its elevation angle. Specifically, when the single-lip sealing mechanism 2 is a sealing ring, the elastic member 24 is a leaf spring; wherein, one edge of the elastic member 24 extends from the first extension 222 to the second support unit 21, and the other edge extends from the first extension 222 to the end 223 of the second sealing unit. Since the first extension 222 connects to the second support unit 21 through the transition portion 221, the elastic member 24 also covers the surface of the transition portion 221, and the arc-shaped design of the transition portion 221 allows the first extension 222 and the second support unit 21 to form a smooth connection, which is beneficial for the elastic member 24 to fit tightly against the transition portion 221. Specifically, the coverage area of ​​the elastic component 24 on the second support unit 21 is about one-third of the radial cross section of the elastic component 24. The elastic component 24 can increase the radial force applied by the second sealing unit 22 to the main shaft 4, ensure that the single-lip sealing mechanism 2 is in close contact with the main shaft 4, enhance the following of the second sealing unit 22, and thus improve the sealing effect.

[0039] In some embodiments, the second support unit 21 is made of multilayer canvas or a high-hardness rubber material. In some embodiments, during the fabrication of the second support unit 21, flexible steel wires 23 are added to the multilayer canvas or high-hardness nitrile rubber during the preforming process to increase the structural strength of the second support unit 21.

[0040] In some embodiments, the second sealing unit 22 is made of hydrogenated nitrile rubber by integral molding and vulcanization. Using a low-hardness rubber material helps to reduce the temperature of the end 223 of the second sealing unit after friction with the main shaft 4.

[0041] In some embodiments, the single-lip sealing mechanism 2 can be made of the same hard nitrile rubber material to save on manufacturing costs and time.

[0042] In some embodiments, the single-lip sealing mechanism 2 can be manufactured by turning the same polyurethane material. The polyurethane material turning process does not require a mold, which can save the production cost and time of the mold and significantly improve production efficiency; at the same time, it is easy to modify the size of the sealing mechanism.

[0043] according to Figures 8 to 11As shown, in one embodiment of this application, the first support unit 11 is provided with a recess 32, and the second support unit 21 is provided with a protrusion 31 that cooperates with the recess 32. The recess 32 and the protrusion 31 are respectively provided on their respective corresponding surfaces of the contact surfaces of the first support unit 11 and the second support unit 21. When the single-lip sealing mechanism 2 and the discontinuous spiral sealing mechanism 1 are stacked and installed, the protrusion 31 is embedded in the recess 32, realizing precise positioning and stable connection between the two. This simplifies the assembly process of the sealing system, improves the stability and durability of the sealing system, avoids sealing failure due to poor assembly, and further enhances the reliability of the sealing system.

[0044] In some embodiments, the second support unit 21 is provided with a recessed portion 32, and the first support unit 11 is provided with a protrusion 31 that cooperates with the recessed portion 32.

[0045] In some embodiments, the radial cross-sectional shape of the protrusion 31 and the recess 32 is formed as a rectangle.

[0046] In some embodiments, the radial cross-sectional shape of the protrusion 31 and the recess 32 is formed as an arc; specifically, the arc is a major arc with a central angle greater than 180°.

[0047] In one embodiment of this application, the sealing system includes multiple single-lip sealing mechanisms 2, which are stacked to form a multi-lip sealing mechanism and are detachably connected via adjacent second support units 21. Figure 10 and Figure 11 As shown, the multi-lip sealing mechanism is located on the outside of the discontinuous spiral sealing mechanism 1.

[0048] In some embodiments, each single-lip sealing mechanism 2 is provided with a recess 32 and a protrusion 31, and the recess 32 and the protrusion 31 are respectively disposed on the surface of an adjacent second support unit 21.

[0049] In some embodiments, see continue to see Figure 10 and Figure 11 As shown, there are two single-lip sealing mechanisms 2. The outer surface of the second support unit 21 of the first-stage single-lip sealing mechanism 2 does not have a recessed portion 32, and the inner surface of the second support unit 21 of the first-stage single-lip sealing mechanism 2 has a protruding portion 31, which is embedded in the recessed portion 32 on the outer surface of the second support unit 21 of the second-stage single-lip sealing mechanism 2. The inner surface of the second support unit 21 of the second-stage single-lip sealing mechanism 2 has a protruding portion 31, which is embedded in the recessed portion 32 on the outer surface of the first support unit 11 of the discontinuous spiral sealing mechanism 1. The inner surface of the first support unit 11 of the discontinuous spiral sealing mechanism 1 does not have a protruding portion 31.

[0050] During operation, the discontinuous spiral sealing mechanism 1 guides the lubricating medium backflow, and works in conjunction with the multi-lip sealing mechanism to further prevent internal lubricating medium leakage. The sealing system of this application significantly improves the sealing reliability of the sealing system through multiple seals, and also allows for flexible adjustment of the number of single-lip sealing mechanisms 2 in the multi-lip sealing mechanism according to different working conditions, achieving a balance between sealing performance and frictional heat generation, while improving the convenience of assembly and maintenance.

[0051] according to Figure 12 As shown, in one embodiment of this application, the sealing system further includes a main shaft 4, and a single-lip sealing mechanism 2 and a discontinuous spiral sealing mechanism 1 are stacked and sleeved on the outside of the main shaft 4. The ends of the first sealing unit 12 and the second sealing unit 22 both abut against the main shaft 4 to form a seal, thereby realizing the dual sealing function of the sealing system. It can ensure that the lubricating medium can effectively flow back during the operation of the main shaft 4, and can also achieve secondary leakage prevention, thereby significantly improving the overall sealing reliability of the sealing system.

[0052] according to Figure 12 As shown, in one embodiment of this application, the main shaft 4 is provided with a groove 41, which can accommodate the lubricating medium. When the lubricating medium flows to the groove 41, the lubricating medium enters and is temporarily stored in the groove 41, which prevents the lubricating medium from flowing along the axial direction of the main shaft 4 to the discontinuous spiral sealing mechanism 1 and the single-lip sealing mechanism 2, thereby further preventing the lubricating medium from leaking to the outside of the sealing system.

[0053] In some embodiments, a plurality of grooves 41 are provided, and the plurality of grooves 41 are arranged side by side.

[0054] according to Figure 12 As shown, in one embodiment of this application, the sealing system further includes a fixing component 6 and an end cap 5. The end cap 5 has an annular mounting portion for accommodating the discontinuous spiral sealing mechanism 1 and the single-lip sealing mechanism 2. During assembly, the discontinuous spiral sealing mechanism 1 and the single-lip sealing mechanism 2 are stacked sequentially and then assembled into the mounting portion. The sealing unit ends of each sealing mechanism abut against the main shaft 4. Then, the fixing component 6 presses the discontinuous spiral sealing mechanism 1 and the single-lip sealing mechanism 2 into the mounting portion of the end cap 5, thus completing the installation of the sealing system.

[0055] In the discontinuous spiral sealing mechanism 1 of this application, the first sealing unit 12 is arranged with a spiral tilt angle of 20°, and an oil guiding channel 13 with a spacing of 10 mm is formed between adjacent first sealing units 12. When the main shaft 4 rotates, the oil guiding channel 13 generates a pumping effect, which can actively guide and return the lubricating medium that seeps out from the end 121 of the first sealing unit or enters the oil guiding channel 13 from the opening area 14 to the oil chamber of the equipment; at the same time, by limiting the thickness of the first sealing unit 12 to the range of 1 mm to 1.5 mm, effective contact with the main shaft 4 is ensured, and frictional heat generation is reduced, thereby stably realizing the recovery and circulation of the lubricating medium and improving the sealing effect. The sealing system of this application further improves the reliability of the seal through the combination of at least one single-lip sealing mechanism 2 and the discontinuous spiral sealing mechanism 1.

[0056] In the description of this specification, the use of terms such as "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A discontinuous spiral sealing mechanism, characterized in that: include First support unit; Multiple first sealing units are spirally arranged inside the first support unit, and the first sealing units are parallel to each other and form an oil guiding channel.

2. The discontinuous spiral sealing mechanism according to claim 1, characterized in that: The spiral tilt angle of the first sealing unit is less than or equal to 20°.

3. The discontinuous spiral sealing mechanism according to claim 1, characterized in that: The thickness of the first sealing unit is 1 mm to 1.5 mm.

4. The discontinuous spiral sealing mechanism according to claim 1, characterized in that: The distance between adjacent first sealing units is 10mm.

5. A sealing system, characterized in that, The sealing system includes the discontinuous spiral sealing mechanism according to any one of claims 1 to 4, and further includes: A single-lip sealing mechanism includes a second support unit and a second sealing unit connected to the second support unit. The second sealing unit is inclined to the axial direction of the single-lip sealing mechanism, and the thickness of the second sealing unit gradually decreases from a position close to the second support unit to a position far away from the second support unit. The single-lip sealing mechanism and the discontinuous spiral sealing mechanism are stacked and detachably connected by the first support unit and the second support unit.

6. The sealing system according to claim 5, characterized in that: The first support unit has a recessed portion, and the second support unit has a protrusion that mates with the recessed portion.

7. The sealing system according to claim 5, characterized in that: It includes multiple single-lip sealing mechanisms, each of which is stacked and detachably connected via adjacent second support units.

8. The sealing system according to claim 5, characterized in that: It also includes a main shaft, and the single-lip sealing mechanism and the discontinuous spiral sealing mechanism are sleeved on the outside of the main shaft. The ends of the first sealing unit and the second sealing unit abut against the main shaft to form a seal.

9. The sealing system according to claim 8, characterized in that: The spindle is provided with a groove for receiving lubricating medium.

10. The sealing system according to claim 8, characterized in that: It also includes a fixing component and an end cap, the end cap having a mounting portion, the fixing component forming a clamping structure with the end cap to fix the discontinuous spiral sealing mechanism and the single-lip sealing mechanism on the mounting portion.

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