Multi-lip sealing mechanism and sealing system

Abstract

The invention discloses a multi-lip sealing mechanism and a sealing system.The multi-lip sealing mechanism comprises a plurality of sealing assemblies, each sealing assembly is independently machined, each sealing assembly comprises a supporting unit and a sealing unit which are connected with each other, the supporting units are used for supporting the sealing units, and the sealing units are used for abutting against a shaft structure; the sealing assemblies are arranged in a stacked mode and detachably connected through the adjacent supporting units, so that the sealing assemblies form multi-lip sealing. The supporting units of the multiple sealing assemblies are sequentially connected in a stacked mode, so that the sealing units are in a stacked state and abut against the shaft structure, multi-lip sealing is formed, and leakage of a lubricating medium is fully avoided. And the adjacent supporting units are detachably connected, so that each sealing assembly can be independently machined, the difficulty of the production process is reduced, and the machining precision can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of equipment sealing, and in particular to a multi-lip sealing mechanism and a sealing system. Background Art

[0002] In various fields of equipment, bearing lubrication has received extensive attention. Especially in wind turbines, the main shaft bearings need to be lubricated, and the wind turbine main shaft is often equipped with a sealing system to prevent the leakage of the lubricating medium. The sealing system can ensure the continuous and stable operation of the wind turbine and ensure that the main shaft bearings operate in a good lubrication environment.

[0003] With the update and iteration of wind turbines, the lubricating media of the main shaft bearings include lubricating oil, grease, etc. In order to fully adapt to a variety of lubricating media, it has become a trend for the wind turbine main shaft to adopt a sealing method with multiple lips. However, the current multi-lip sealing mechanism adopts an integral manufacturing process, which has certain difficulties in the production process and affects production efficiency. At the same time, there are also limitations in the application of the maintenance market. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a multi-lip sealing mechanism, which is easy to process and reduces the difficulty of the production process.

[0005] The present application also proposes a sealing system having the multi-lip sealing mechanism.

[0006] According to the multi-lip sealing mechanism of the first aspect embodiment of the present application, the multi-lip sealing mechanism includes a plurality of sealing components, each of which is processed independently, and the sealing components include a supporting unit and a sealing unit connected to each other, the supporting unit is used to support the sealing unit, and the sealing unit is used to abut against the shaft structure; wherein each of the sealing components is stacked and detachably connected through adjacent supporting units so that each of the sealing components forms a multi-lip seal.

[0007] The multi-lip sealing mechanism according to the embodiment of the present application has at least the following beneficial effects: the supporting units of several sealing components are stacked and connected in sequence, so that each sealing unit is also in a stacked state and abuts against the shaft structure, thereby forming a multi-lip seal and fully avoiding leakage of the lubricating medium; adjacent supporting units are detachably connected, which is convenient for independent processing of each sealing component, reducing the difficulty of the production process and helping to improve processing accuracy.

[0008] According to some embodiments of the present application, the sealing assembly is formed as a sealing ring, the supporting unit is located at the outer edge of the sealing assembly, the sealing unit is located at the inner edge of the sealing assembly, and the sealing assembly is sleeved on the outer side of the shaft structure so that the sealing unit contacts the side wall of the shaft structure.

[0009] According to some embodiments of the present application, the sealing unit is inclined relative to the axial direction of the sealing assembly, and the sealing unit is inclined toward the oil leakage position of the shaft structure to form an elevation angle.

[0010] According to some embodiments of the present application, the thickness of the sealing unit gradually decreases from a position close to the supporting unit to a position far away from the supporting unit, so that gaps are formed between adjacent sealing units.

[0011] According to some embodiments of the present application, the outer wall of the sealing unit includes a transition portion, a first extension portion, a tail portion, and a second extension portion, the first extension portion is located at the elevation angle side of the sealing unit and is connected to the support unit through the transition portion, the second extension portion is located on the opposite side of the first extension portion and is connected to the support unit, the first extension portion and the second extension portion are connected through the tail portion, and the tail portion is used to resist the shaft structure.

[0012] According to some embodiments of the present application, the radial length of each sealing unit gradually decreases in the direction away from the oil leakage position of the shaft structure, so that the interference between each sealing unit and the shaft structure gradually decreases in the direction away from the oil leakage position of the shaft structure.

[0013] According to some embodiments of the present application, a connection assembly is provided between adjacent support units, and the adjacent support units are detachably connected through the connection assembly and are stacked.

[0014] According to some embodiments of the present application, the connecting assembly includes a protruding portion and a recessed portion, the protruding portion and the recessed portion are respectively arranged on adjacent support units, and the protruding portion is embedded in the recessed portion so that adjacent support units can be plugged into each other.

[0015] According to some embodiments of the present application, the hardness of the support unit is greater than that of the sealing unit, the support unit is made of rubber material or flexible material and reinforced material is added, the sealing unit is made of rubber material, and the support unit and the sealing unit are integrally formed; or, the sealing assembly is made of PU material by turning as a whole.

[0016] According to some embodiments of the present application, the sealing assembly further includes an elastic component, which covers the first extension portion and extends to the tail portion and the support unit.

[0017] According to the sealing system of the second aspect embodiment of the present application, the sealing system includes a main shaft and the above-mentioned multi-lip sealing mechanism, the sealing unit abuts against the side wall of the main shaft, and the side wall of the main shaft is provided with a accommodating component, and the accommodating component is used to prevent oil from flowing along the axial direction of the main shaft to the multi-lip sealing mechanism.

[0018] The sealing system according to the embodiment of the present application has at least the following beneficial effects: the multi-lip sealing mechanism of the first aspect of the present application is adopted, and the multi-lip sealing mechanism includes a sealing assembly, and the supporting units of several sealing assemblies are stacked and connected in sequence, so that each sealing unit is also in a stacked state and abuts against the shaft structure, thereby forming a multi-lip seal to fully avoid leakage of the lubricating medium; adjacent supporting units are detachably connected, which is convenient for independent processing of each sealing assembly, reducing the difficulty of the production process, and is conducive to improving processing accuracy.

[0019] According to some embodiments of the present application, the accommodating assembly includes a plurality of accommodating grooves arranged in parallel, and the accommodating grooves are used to accommodate oil.

[0020] According to some embodiments of the present application, the sealing system includes an end cover and a positioning component, the end cover is provided with a mounting groove, the supporting unit is embedded in the mounting groove, and is positioned by the positioning component.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide further understanding of the technical solution disclosed in the present application and constitute a part of the specification. Together with the embodiments disclosed in the present application, they are used to explain the technical solution disclosed in the present application and do not constitute a limitation on the technical solution disclosed in the present application.

[0023] Figure 1 This is a cross-sectional view of the multi-lip sealing mechanism of the embodiment of the present application during application;

[0024] Figure 2 It is a cross-sectional view of a conventional multi-lip sealing mechanism during application;

[0025] Figure 3 It is a cross-sectional view of a sealing component in a multi-lip sealing mechanism according to an embodiment of the present application;

[0026] Figure 4 A cross-sectional view of the stacked connection of the sealing components in the multi-lip sealing mechanism of the embodiment of the present application;

[0027] Figure 5 A cross-sectional view of the sealing components in the multi-lip sealing mechanism of the embodiment of the present application being disassembled from each other;

[0028] Figure 6 It is a cross-sectional view of each sealing unit having different radial lengths in the multi-lip sealing mechanism of the embodiment of the present application;

[0029] Figure 7 The multi-lip sealing mechanism of the present application embodiment Figure 6 The structural diagram of part A in the figure;

[0030] Figure 8 A cross-sectional view showing that the radial cross-section of the raised portion in the multi-lip sealing mechanism of the embodiment of the present application is in the shape of an arc;

[0031] Fig. 9 This is a schematic diagram of the position of the elastic component in the multi-lip sealing mechanism of the embodiment of the present application;

[0032] Fig.10 Cross-sectional views of two other embodiments of the multi-lip sealing mechanism of the present application;

[0033] Fig.11 This is a schematic diagram of the positions of the split interfaces of the multi-lip sealing mechanism of the embodiment of the present application;

[0034] Fig.12 It is a cross-sectional view of the sealing system according to an embodiment of the present application.

[0035] Reference numerals:

[0036] Sealing assembly 100; supporting unit 101; sealing unit 102; elastic component 103;

[0037] Transition portion 201; first extension portion 202; tail portion 203; second extension portion 204; gap 205;

[0038] Raised portion 301; recessed portion 302;

[0039] Straight portion 401; inclined portion 402;

[0040] Splitting interface 501;

[0041] Main shaft 601; accommodating groove 602; end cover 603; positioning component 604. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0043] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0044] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0045] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0046] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0047] like Figure 1 As shown, the embodiment of the present application provides a multi-lip sealing mechanism, which includes a sealing assembly 100. A single sealing assembly 100 is equivalent to a layer of sealing lip. Several sealing assemblies 100 are stacked and arranged on the shaft structure to form a multi-lip seal to prevent leakage of the lubricating medium. At the same time, adjacent sealing assemblies 100 are detachably connected. During the production process, each sealing assembly 100 is processed independently, which reduces the difficulty of the production process and improves the quality of the sealing assembly 100. During the installation process, the sealing assemblies 100 are stacked and connected to form an overall multi-lip sealing mechanism, and then sleeved on the shaft structure.

[0048] like Figure 3 As shown, in some examples, the sealing assembly 100 includes a supporting unit 101 and a sealing unit 102, and the sealing unit 102 is used to block the leaked oil. It is understandable that the leaked oil will flow along the axial direction of the shaft structure, thereby forming a leakage hazard. The sealing unit 102 abuts against the side wall of the shaft structure and blocks the oil to form a sealing effect, thereby preventing the oil from leaking to the outside of the device along the axial direction of the shaft structure. Among them, the sealing unit 102 forms an interference fit with the shaft structure, ensuring that the sealing unit 102 is in close contact with the side wall of the shaft structure, further improving the sealing effect.

[0049] Meanwhile, the sealing unit 102 is connected to the supporting unit 101 , and the supporting unit 101 is used to support the sealing unit 102 to ensure the stability of the position of the sealing unit 102 so that the sealing function of the multi-lip sealing mechanism is continuously effective.

[0050] like Figure 4 and Figure 5 As shown, it is worth noting that each sealing component 100 is stacked, and adjacent sealing components 100 are detachably connected via adjacent supporting units 101, which facilitates independent processing of each sealing component 100 and also facilitates assembly of each sealing component 100 into one.

[0051] Specifically, Figure 2 As shown, the conventional multi-lip sealing mechanism is formed into an integral structure that cannot be disassembled. Since there needs to be a certain interval between the adjacent layers of sealing lips, during the processing, the tool needs to continuously extend into the position between the adjacent layers of sealing lips and process a narrow and long gap 205. The production process is difficult and is not conducive to controlling the quality of the integral multi-lip sealing mechanism. At the same time, the root position of each layer of sealing lips close to the above-mentioned gap 205 usually needs to be processed into a rounded corner. Therefore, the tool not only needs to extend into the narrow and long gap 205, but also needs to process the required rounded corner in the gap 205 according to the size requirements, further increasing the difficulty of the production process.

[0052] In the processing of the multi-lip sealing mechanism of the present application, since adjacent sealing components 100 can be disassembled and installed, each sealing component 100 can be processed separately. It can be understood that when the sealing components 100 are connected as a whole, there will be gaps 205 between adjacent sealing components 100; when the sealing components 100 are separated from each other into several independent individuals, there will be no gaps 205 that are difficult for the tool to enter, which facilitates processing. The multi-lip sealing mechanism of the present application can greatly simplify the production process and improve processing efficiency and quality.

[0053] In addition, when oil adheres to the gap 205 between adjacent sealing lips, it is difficult for a cleaning tool to reach into the gap 205 of a conventional multi-lip sealing mechanism for cleaning and wiping due to the integrated structure. The multi-lip sealing mechanism of the present application can be disassembled to eliminate the influence of the gap 205 during the cleaning process, making it easier to use a cleaning tool to clean and wipe each sealing assembly 100 step by step, thereby improving convenience.

[0054] It can be understood that the detachable connection of adjacent sealing assemblies 100 also facilitates reducing or increasing the number of sealing assemblies 100. For equipment with a large amount of oil leakage, the number of sealing assemblies 100 can be increased; and for equipment with a small amount of oil leakage, the number of sealing assemblies 100 can be reduced, which has high flexibility and strong adaptability.

[0055] In some examples, the sealing assembly 100 is formed as a sealing ring and is sleeved on the outside of the shaft structure. In order to make the sealing unit 102 abut against the side wall of the shaft structure, the sealing unit 102 needs to face the shaft structure, that is, the support unit 101 is at the outer edge of the sealing assembly 100, and the sealing unit 102 is at the inner edge of the sealing assembly 100. It can be understood that the radial dimension of the support unit 101 is greater than the radial dimension of the sealing unit 102.

[0056] In some examples, such as Figure 3 As shown, the radial cross section of the support unit 101 is roughly formed into a rectangle, and the sealing unit 102 is inclined to the axial direction of the sealing assembly 100, that is, the extension direction of the sealing unit 102 is at an angle to the extension direction of the support unit 101, and an elevation angle is formed between the sealing unit 102 and the support unit 101. Specifically, the sealing unit 102 is inclined toward the oil leakage position of the shaft structure.

[0057] In some examples, such as Figure 3 As shown, the outer wall of the sealing unit 102 includes a first extension portion 202 and a second extension portion 204. The first extension portion 202 is located at the elevation angle facing side of the sealing unit 102, and the second extension portion 204 is located at the elevation angle facing away side of the sealing unit 102. Then, the first extension portion 202 and the second extension portion 204 are located at opposite sides of the sealing unit 102. It can be understood that the deformation capacity of the sealing unit 102 is positively correlated with the length of the sealing unit 102. The first extension portion 202 and the second extension portion 204 both have a certain length, ensuring that the sealing unit 102 also has a certain radial length, so that the sealing unit 102 can make a certain degree of deformation in the process of abutting the shaft structure, which is convenient for the sealing cooperation between the two.

[0058] The outer wall of the sealing unit 102 includes a transition portion 201 and a tail portion 203. The first extension portion 202 is connected to the support unit 101 through the transition portion 201, and the second extension portion 204 is also connected to the support unit 101. The tail portion 203 is located at a position where the sealing unit 102 is far away from the support unit 101, and connects the first extension portion 202 and the second extension portion 204. The sealing unit 102 is in contact with the side wall of the shaft structure through the tail portion 203.

[0059] Specifically, the first extension portion 202 and the second extension portion 204 are arranged in a straight line, and the first extension portion 202 and the second extension portion 204 define the thickness of the sealing unit 102. Specifically, the thickness of the sealing unit 102 is less than the thickness of the support unit 101. The transition portion 201 is arranged in an arc shape and is formed as a transition fillet at the connection between the support unit 101 and the sealing unit 102.

[0060] It is worth noting that the arc-shaped transition portion 201 can disperse the stress more evenly when subjected to force, reduce local stress concentration, help reduce the risk of damage to the sealing unit 102 due to uneven force, and improve the reliability and durability of the seal; at the same time, the arc-shaped transition portion 201 enables the sealing unit 102 to better adapt to the slight eccentricity or jumping movement of the shaft structure, thereby maintaining stable contact between the sealing unit 102 and the shaft structure and reducing the possibility of oil leakage; in addition, the arc-shaped transition portion 201 can increase the vulcanization contact area between the support unit 101 and the sealing unit 102, thereby improving the pass rate and stability of the sealing assembly 100.

[0061] In some examples, such as Fig. 9 As shown, the sealing assembly 100 further includes an elastic component 103, which covers the first extension portion 202, that is, is located at the elevation angle side of the sealing unit 102. Specifically, when the sealing assembly 100 is formed as a sealing ring, the elastic component 103 is a leaf spring.

[0062] One side edge of the elastic component 103 extends from the first extension portion 202 to the support unit 101, and the other side edge extends from the first extension portion 202 to the tail portion 203. Since the first extension portion 202 is connected to the support unit 101 through the transition portion 201, the elastic component 103 will also cover the surface of the transition portion 201, and the arc-shaped design of the transition portion 201 enables the first extension portion 202 to be smoothly connected with the support unit 101, which is conducive to the elastic component 103 being closely attached to the transition portion 201.

[0063] Specifically, the coverage area of ​​the elastic component 103 on the support unit 101 is approximately one-third of the radial cross-section of the elastic component 103. The elastic component 103 can increase the radial force applied by the sealing unit 102 to the shaft structure, ensure that the sealing unit 102 is in close contact with the shaft structure, enhance the tracking performance of the sealing unit 102, and thus improve the sealing effect.

[0064] In some examples, the thickness of the sealing unit 102 gradually decreases from a position close to the supporting unit 101 to a position far away from the supporting unit 101 , that is, the distance between the first extending portion 202 and the second extending portion 204 gradually decreases.

[0065] The greater the thickness of the sealing unit 102, the smaller the deformation capacity, but the greater the structural strength; conversely, the smaller the thickness of the sealing unit 102, the greater the deformation capacity, but the smaller the structural strength. The tail 203 of the sealing unit 102 needs to abut and deform with the shaft structure, and the position where the sealing unit 102 is connected to the support unit 101 needs to ensure the connection strength and structural strength. Therefore, the thickness of the sealing unit 102 is set to be gradual.

[0066] Furthermore, although the thickness of the sealing unit 102 is in a gradual form, the thickness of the sealing unit 102 is smaller than the thickness of the supporting unit 101 at all locations to ensure the deformation capability of the sealing unit 102. When the sealing assemblies 100 are stacked, gaps 205 will exist between adjacent sealing units 102.

[0067] In the first embodiment, the radial lengths of the sealing units 102 are equal, and the interferences between the sealing units 102 and the shaft structure are also equal. Therefore, the radial forces applied by the sealing units 102 to the shaft structure are substantially the same.

[0068] Specifically, the equal radial lengths of the sealing units 102 facilitate the uniform manufacture of the sealing assemblies 100 , which is beneficial to standardized production and improved production efficiency.

[0069] It is worth noting that the more contact parts the sealing unit 102 has with the main shaft 601, the greater the interference, and the tighter the contact between the sealing unit 102 and the shaft structure, the stronger the overall sealing performance of the multi-lip sealing mechanism. However, the shaft structure will form friction with the sealing unit 102. The more contact parts there are, the greater the heat generated by friction. Therefore, the heat generated by friction between each sealing unit 102 and the shaft structure in the first embodiment is basically the same.

[0070] In the second embodiment, if Figure 6 and Figure 7 As shown, the radial lengths of the sealing units 102 are different, and gradually decrease in the direction away from the oil leakage position of the shaft structure, that is, the radial length of the sealing unit 102 closer to the oil leakage position of the shaft structure is larger, and the radial length of the sealing unit 102 farther away from the oil leakage position of the shaft structure is smaller.

[0071] Among them, when there are three stacked sealing assemblies 100, the first-stage sealing assembly 100 is closest to the oil leakage position of the shaft structure, the third-stage sealing assembly 100 is farthest from the oil leakage position of the shaft structure, and the second-stage sealing assembly 100 is between the first-stage sealing assembly 100 and the third-stage sealing assembly 100. The first-stage sealing unit 102 has the largest radial length, and exerts a large radial force on the shaft structure to achieve an oil sealing effect; the third-stage sealing unit 102 has the smallest radial length, and even does not form an interference fit with the shaft structure, achieving dust prevention on the outside of the equipment equipped with the shaft structure; the second-stage sealing unit 102 has a radial length between the first-stage sealing unit 102 and the third-stage sealing unit 102, further enhancing the sealing effect.

[0072] Specifically, since the interference between the second-stage and third-stage sealing units 102 and the shaft structure is small or even non-existent, the heat generated by the relative movement between the multi-lip sealing mechanism and the shaft structure is reduced, which is beneficial to the heat dissipation of the equipment.

[0073] In some examples, a connection assembly is provided between adjacent support units 101, and the connection assembly is located on the mutually abutting surfaces of the adjacent support units 101, and the adjacent support units 101 are detachably connected through the connection assembly. At the same time, the connection assembly can ensure that the radial positions of the adjacent support units 101 are approximately the same after being connected to each other, so that each support unit 101 maintains a coaxial state, which is convenient for positioning the multi-lip sealing mechanism and also for installing the multi-lip sealing mechanism on the shaft structure.

[0074] In some examples, the connection assembly includes a protrusion 301 and a recess 302 , and the protrusion 301 and the recess 302 are respectively disposed on surfaces of adjacent support units 101 .

[0075] Specifically, when there are three stacked sealing assemblies 100, the first-level support unit 101 is provided with a recessed portion 302 facing the second-level support unit 101, and the second-level support unit 101 is provided with a protruding portion 301 facing the first-level support unit 101, and the first-level support unit 101 does not need to be provided with any additional protruding portion 301 or recessed portion 302. At the same time, the second-level support unit 101 is provided with a recessed portion 302 facing the third-level support unit 101, and the third-level support unit 101 is provided with a protruding portion 301 facing the second-level support unit 101, and the third-level support unit 101 does not need to be provided with any additional protruding portion 301 or recessed portion 302. The shapes of the corresponding protruding portions 301 and the recessed portions 302 are approximately the same, and the protruding portions 301 can be embedded in the recessed portions 302, so that the adjacent support units 101 can be detachably connected in a plug-in manner and radial positioning is ensured.

[0076] It is understandable that the corresponding raised portions 301 and recessed portions 302 can be interchanged in their positions, and can also ensure a detachable connection in the form of plug-in. In addition, the depth of the recessed portion 302 is slightly higher than the height of the raised portion 301, leaving a margin for the plug-in process, ensuring that when the corresponding raised portions 301 and recessed portions 302 are plugged in, the adjacent support units 101 can fit each other, thereby improving the integrity of the multi-lip sealing mechanism.

[0077] It is worth noting that when the sealing assembly 100 is formed into a sealing ring, the protrusions 301 and the recesses 302 can extend a full circle on the surface of the sealing unit 102, or can be arranged in sections and intervals. If the protrusions 301 and the recesses 302 are arranged in sections and intervals, the protrusions 301 and the recesses 302 on the same support unit 101 are evenly distributed and staggered, that is, the radial positions of the protrusions 301 and the radial positions of the recesses 302 on the second-level support unit 101 are staggered.

[0078] In some examples, the radial cross-sectional shape of the protrusion 301 and the recessed portion 302 is formed into a rectangular shape, which is convenient for processing while ensuring the plug-in relationship.

[0079] In other embodiments, Figure 8 As shown, the radial cross-sectional shape of the protrusion 301 and the recess 302 is formed into an arc. Specifically, the arc here is a major arc with a central angle greater than 180°, so the width dimension of the opening of the recess 302 is slightly smaller than the width dimension of the inner cavity, and the shape of the protrusion 301 corresponds to the shape of the recess 302. At this time, when the protrusion 301 is embedded in the recess 302, the protrusion 301 is clamped inside the recess 302 to prevent the protrusion 301 and the recess 302 from being separated from each other, that is, to prevent the adjacent support units 101 from being separated from each other, and to achieve a certain degree of axial positioning.

[0080] In some examples, since the support unit 101 is used to position the sealing assembly 100 and the sealing unit 102 needs to be deformed to a certain extent, the hardness of the support unit 101 is greater than the hardness of the sealing unit 102 .

[0081] The support unit 101 is made of rubber material or flexible material and reinforced material. Specifically, the rubber material used in the support unit 101 is a high-hardness NBR material, the flexible material is a multi-layer canvas, and the reinforced material is a flexible steel wire.

[0082] Furthermore, the sealing unit 102 is made of rubber material. Specifically, the rubber material used by the sealing unit 102 is HNBR material. The support unit 101 and the sealing unit 102 are vulcanized and integrally formed.

[0083] Alternatively, the sealing component 100 is entirely made of PU material by turning. The PU turning process does not require a mold, saving the cost and time of mold production and manufacturing processes. The single-piece or small-batch production efficiency is extremely high, and the product size is easy to adjust, thereby improving the dimensional stability of the product.

[0084] like Fig.10 As shown, in other examples, the shape of the sealing unit 102 can be adaptively improved so that the middle part of the sealing unit 102 forms a reverse bend away from the oil leakage position of the shaft structure. In other embodiments, the sealing unit 102 includes a straight portion 401 and an inclined portion 402 connected to each other, the straight portion 401 and the inclined portion 402 are at an angle, and the inclined portion 402 slopes toward the oil leakage position of the shaft structure. At the same time, the support unit 101 is formed as an integrated structure, and the support unit 101 is provided with a plurality of slots for plugging the straight portion 401.

[0085] like Fig.11As shown, in some examples, each level of the sealing assembly 100 has a split interface 501. During the assembly process of the multi-lip sealing mechanism, the interface is misplaced and placed on one side of the multi-lip sealing mechanism. When the shaft structure is arranged horizontally and the multi-lip sealing mechanism is sleeved on the outside of the shaft structure, the side of the multi-lip sealing mechanism with the split interface 501 is placed at the 12 o'clock direction, that is, at the top of the shaft structure.

[0086] like Fig.12 As shown, an embodiment of the present application provides a sealing system, which includes a main shaft 601 and the above-mentioned multi-lip sealing mechanism, where the main shaft 601 is equivalent to the above-mentioned shaft structure.

[0087] Among them, there is an oil leakage position on the side wall of the main shaft 601, the sealing unit 102 abuts against the side wall of the main shaft 601, and a accommodating component is provided on the side wall of the main shaft 601. The accommodating component is located between the oil leakage position and the sealing unit 102, and is used to prevent the oil from flowing along the axial direction of the main shaft 601 to the multi-lip sealing mechanism.

[0088] In some examples, the receiving assembly includes a plurality of receiving grooves 602 arranged in parallel. When the oil flows to the position of the receiving groove 602, the oil enters and is temporarily stored in the receiving groove 602, thereby preventing the oil from further flowing to the multi-lip sealing mechanism. It can be understood that the receiving assembly and the multi-lip sealing mechanism fully prevent the oil from leaking to the outside of the sealing system in two ways.

[0089] Specifically, the inner cavity of each accommodating groove 602 defines a space for accommodating oil to prevent the oil from continuing to leak to the outside. At the same time, a protruding blocking component is provided on the main shaft of the traditional sealing system. On the one hand, the blocking component needs to be additionally processed and assembled to the main shaft. Both the processing and assembly processes require time costs, which significantly reduces production efficiency. On the other hand, the blocking component can only block the movement path of the oil and has no accommodating capacity. The oil that is only blocked still has a large movement space inside the sealing system, and it is easy for the oil to move and vibrate in the movement space, which is not conducive to the overall movement stability of the equipment.

[0090] As for the receiving groove 602 of the present application, on the one hand, the receiving groove 602 is directly processed on the side wall of the main shaft 601, and is integrated with the main shaft 601, thereby improving production efficiency and eliminating the need for additional assembly. On the other hand, the receiving groove 602 defines a smaller receiving space, and the receiving space only has a one-way opening, which largely limits the movement of the oil in the receiving groove 602 and avoids the occurrence of oil vibration.

[0091] More importantly, the receiving groove 602 forms a capillary effect on the oil. When the oil flows to the position of the receiving groove 602, the receiving groove 602 absorbs the oil through the capillary action, providing a certain suction power for the oil; when the oil is inside the receiving groove 602, the capillary adsorption effect further prevents the oil from moving unexpectedly. Among them, the smaller the width of the receiving groove 602, the more obvious the capillary effect of adsorbing the oil. Therefore, in order to give full play to the capillary effect, the receiving groove 602 has a smaller width. Specifically, oils of different properties have different response effects to the capillary action. It is necessary to set the width of the receiving groove 602 according to the properties of the oil to ensure that the receiving groove 602 is effective in adsorbing the oil.

[0092] In some examples, the sealing system includes an end cap 603 and a positioning component 604. The end cap 603 is provided with a mounting groove, and each support unit 101 is embedded in the mounting groove in parallel. Further, the positioning component 604 is installed on the end cap 603, and the positioning component 604 extends to the range of the support unit 101 and presses the support unit 101, thereby locking the position of the multi-lip sealing mechanism. Specifically, the positioning component 604 is an annular pressure plate.

[0093] In the actual implementation process, first, a receiving assembly is processed on the main shaft 601. After the main shaft 601 and the end cover 603 are installed, the sealing assemblies 100 are assembled into an integral multi-lip sealing mechanism. The multi-lip sealing mechanism is installed in the installation groove of the end cover 603 so that each sealing unit 102 abuts against the side wall of the main shaft 601. The position of the multi-lip sealing mechanism is then locked by the positioning component 604 to complete the layout of the sealing system.

[0094] In some selectable embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the application is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. Selectable embodiments are expected, wherein the order of various operations is changed and the sub-operation of a part described as a larger operation is performed independently.

[0095] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A multi-lip sealing mechanism, characterized in that: include: A plurality of sealing assemblies, each of which is processed independently, wherein the sealing assemblies include a supporting unit and a sealing unit connected to each other, wherein the supporting unit is used to support the sealing unit, and the sealing unit is used to abut against the shaft structure; Wherein, each of the sealing components is stacked and detachably connected via adjacent supporting units, so that each of the sealing components forms a multi-lip seal.

2. The multi-lip sealing mechanism according to claim 1, characterized in that: The sealing component is formed as a sealing ring, the supporting unit is located at the outer edge of the sealing component, the sealing unit is located at the inner edge of the sealing component, and the sealing component is sleeved on the outer side of the shaft structure so that the sealing unit contacts the side wall of the shaft structure.

3. The multi-lip sealing mechanism according to claim 1 or 2, characterized in that: The sealing unit is inclined to the axial direction of the sealing assembly, and the sealing unit slopes toward the oil leakage position of the shaft structure to form an elevation angle.

4. The multi-lip sealing mechanism according to claim 1 or 2, characterized in that: The thickness of the sealing unit gradually decreases from a position close to the supporting unit to a position far away from the supporting unit, so that gaps are formed between adjacent sealing units.

5. The multi-lip sealing mechanism according to claim 3, characterized in that: The outer wall of the sealing unit includes a transition portion, a first extension portion, a tail portion, and a second extension portion. The first extension portion is located at the elevation angle side of the sealing unit and is connected to the support unit through the transition portion. The second extension portion is located on the opposite side of the first extension portion and is connected to the support unit. The first extension portion and the second extension portion are connected through the tail portion, and the tail portion is used to resist the shaft structure.

6. The multi-lip sealing mechanism according to claim 1, characterized in that: The radial length of each sealing unit decreases step by step in a direction away from the oil leakage position of the shaft structure, so that the interference between each sealing unit and the shaft structure decreases step by step in a direction away from the oil leakage position of the shaft structure.

7. The multi-lip sealing mechanism according to claim 1, characterized in that: A connection assembly is arranged between adjacent support units, and the adjacent support units are detachably connected through the connection assembly and are stacked.

8. The multi-lip sealing mechanism according to claim 7, characterized in that: The connecting assembly includes a protruding portion and a recessed portion, wherein the protruding portion and the recessed portion are respectively arranged on adjacent supporting units, and the protruding portion is embedded in the recessed portion so that adjacent supporting units are plugged into each other.

9. The multi-lip sealing mechanism according to claim 1, characterized in that: The hardness of the support unit is greater than or equal to that of the sealing unit. The support unit is made of rubber material or flexible material with reinforcement material added. The sealing unit is made of rubber material. The support unit and the sealing unit are integrally formed. Alternatively, the sealing component is made of PU material by turning as a whole.

10. The multi-lip sealing mechanism according to claim 5, characterized in that: The sealing assembly further includes an elastic component, which covers the first extension portion and extends to the tail portion and the support unit.

11. A sealing system, characterized in that: It comprises a main shaft and a multi-lip sealing mechanism as claimed in any one of claims 1 to 11, wherein the sealing unit abuts against the side wall of the main shaft, and the side wall of the main shaft is provided with a receiving assembly, and the receiving assembly is used to prevent oil from flowing along the axial direction of the main shaft to the multi-lip sealing mechanism.

12. The sealing system according to claim 11, characterized in that The containing assembly comprises a plurality of containing grooves arranged in parallel, and the containing grooves are used for containing oil.

13. The sealing system according to claim 11, characterized in that The sealing system comprises an end cover and a positioning component. The end cover is provided with a mounting groove. The supporting unit is embedded in the mounting groove and is positioned by the positioning component.

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