A floating seal mount and floating seal assembly

Abstract

This utility model discloses a floating seal mounting base and a floating seal assembly, belonging to the field of engineering machinery technology. It includes a static floating seal ring, a dynamic floating seal ring, a static mounting base, and a dynamic mounting base. The static mounting base includes a base, with a static ring cavity formed on the inner side of the base for mounting the static floating seal ring. The outer edge of the static ring cavity is stepped, and an oil hole penetrating the static ring cavity is provided on the outer side of the base. The dynamic mounting base includes a base, with a dynamic ring cavity formed on the outer side of the base for mounting the dynamic floating seal ring. The outer edge of the dynamic ring cavity forms a stepped structure that matches the stepped outer edge of the static ring cavity, and the two stepped outer edges, when assembled, form a stepped gap. An oil hole penetrating the dynamic ring cavity is provided on the inner side of the base. This utility model enhances the flow of lubricating oil inside the floating seal ring by providing oil holes on the two mounting bases, thereby reducing the temperature of the floating seal ring. Designing the gap between the two mounting bases as a stepped narrow slit prevents the intrusion of foreign matter and avoids oil leakage.

Description

Technical Field

[0001] This utility model belongs to the field of engineering machinery technology, and relates to a floating sealing structure, specifically, to the structural design of a floating sealing mounting base. Background Technology

[0002] A floating seal is a mechanical structure suitable for sealing lubricating oil in rotating devices, such as... Figure 1 , 2 As shown, it is typically assembled from two floating seal rings 11 and 12 and two O-rings 21 and 22. In use, one O-ring 21 and one O-ring 22 are installed on each of the two floating seal rings 11 and 12, respectively. The floating seal rings 11 and 12 and the O-rings 21 and 22 are then installed in two mounting seats 31 and 32, respectively. The assembly and fixation of the floating seal rings 11 and 12 and the O-rings 21 and 22 in the mounting seats 31 and 32 is achieved through the compression deformation of the O-rings 21 and 22 after installation. During operation, the inner floating seal ring 11 and the O-ring 21 rotate with the inner mounting seat 31, while the outer floating seal ring 12 and the O-ring 22 remain stationary with the outer mounting seat 32. The oil film formed between the contact surfaces of the two floating seal rings 11 and 12 provides a sealing effect, thereby sealing the internal lubricating oil.

[0003] Because the floating seal assembly is fixed on one side and rotates on the other side during operation, the existing floating seal structure has at least the following two problems:

[0004] First, the two floating seal rings 11 and 12 are prone to heat generation due to relative rotation. If too much heat is generated, the temperature of the floating seal rings 11 and 12 will rise sharply, which will lead to the failure of the two O-ring seals 21 and 22.

[0005] Secondly, the sealing seats 31 and 32 on both sides cannot be completely closed, and there is always a gap 40. If the floating sealing assembly is working in an environment with a lot of pollutants such as mud and dust, these foreign objects may enter through this gap, causing the seal to fail and resulting in oil leakage.

[0006] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0007] This utility model addresses at least one of the aforementioned technical problems in the prior art by proposing a floating seal mounting base. It reduces the temperature of the floating seal ring by enhancing the flow of lubricating oil inside the floating seal ring and blocks external foreign objects by changing the gap structure between the two mounting bases.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] In one aspect, this utility model proposes a floating sealing mounting base, comprising:

[0010] A static mounting base includes a base having an inner side and an outer side opposite to each other; the inner side of the base forms a static ring cavity for mounting a static floating sealing ring, and the outer edge of the static ring cavity forms a stepped shape; an oil hole penetrating the static ring cavity is provided on the outer side of the base.

[0011] A dynamic mounting base includes a base having an outer side facing the static mounting base and an inner side opposite to the outer side; the outer side of the base forms a dynamic ring cavity for mounting a dynamic floating seal ring, the outer edge of the dynamic ring cavity forming a stepped structure adapted to the stepped outer edge of the static ring cavity, and the two stepped outer edges forming a stepped gap after assembly; an oil hole penetrating the dynamic ring cavity is provided on the inner side of the base.

[0012] In some embodiments of this application, the inner side of the outer edge of the stationary ring cavity can be formed into a stepped shape, and the outer side of the outer edge of the moving ring cavity can be formed into a stepped shape; thus, after the two stepped outer edges are assembled, the outer edge of the stationary ring cavity covers the outer periphery of the outer edge of the moving ring cavity, which can protect the rotating parts.

[0013] In some embodiments of this application, a groove for installing a sealing ring can be formed on the inner wall of the stationary ring cavity near the bottom of the cavity. The sealing ring is used to install on the stationary floating sealing ring to achieve a seal on the outer circumference of the stationary floating sealing ring. Similarly, a groove for installing a sealing ring can also be formed on the inner wall of the moving ring cavity at the cavity opening. The sealing ring is used to install on the moving floating sealing ring to achieve a seal on the outer circumference of the moving floating sealing ring. By forming sealing ring mounting grooves on the two mounting seats respectively, the stability of the floating sealing ring and the sealing ring in the mounting seat can be improved.

[0014] To ensure the fluidity of the lubricating oil, the location of the oil holes on the mounting base needs to be specially designed. In some embodiments of this application, the oil holes on the stationary mounting base can be positioned below the axis of the stationary mounting base. Since the stationary mounting base remains stationary during operation, the lubricating oil accumulates in the lower half of the stationary mounting base. Therefore, positioning the oil holes below the axis of the stationary mounting base ensures normal flow of the lubricating oil. Multiple oil holes can be formed on the moving mounting base and arranged around the axis of the moving mounting base. Since the moving mounting base rotates during operation, the lubricating oil is also thrown up. Therefore, designing the oil holes in a circumferential distribution ensures that lubricating oil thrown to different heights can flow normally through the oil holes at their corresponding heights.

[0015] In some embodiments of this application, multiple oil holes can be opened in the area below the axis of the static mounting base, and the multiple oil holes are arranged in an arc with the axis of the static mounting base as the center, so as to increase the amount of lubricating oil flowing through the oil holes per unit time, thereby improving the heat dissipation effect.

[0016] In some embodiments of this application, an oil hole can be configured on the stationary mounting base, with its opening in the stationary ring cavity facing the hollow area enclosed by the inner ring of the stationary floating seal ring; an oil hole can also be configured on the moving mounting base, with its opening in the moving ring cavity facing the hollow area enclosed by the inner ring of the moving floating seal ring, so as to make the flow of lubricating oil smoother.

[0017] In some embodiments of this application, several notches can be formed on the outer edge of the stationary ring cavity, forming drain ports distributed in the area below the axial center of the outer edge. By creating drain ports on the stationary mounting base, foreign objects that have entered the stepped gaps can be moved to the bottom of the stationary mounting base as the moving mounting base rotates, and then fall out from the drain ports. This prevents foreign objects from entering the stationary ring cavity containing the sealing ring and floating seal ring, thus avoiding damage to the sealing ring or floating seal ring and subsequent sealing failure. The drain ports are configured to extend axially from the outermost edge of the stationary ring cavity to the outermost stepped surface or terminate before reaching the outermost stepped surface to prevent foreign objects from more easily entering the stationary ring cavity through the notches due to excessive depth.

[0018] In some embodiments of this application, to achieve rotational assembly between the static mounting base and the moving mounting base, a shaft cylinder can be formed in the central region of the static ring cavity. The shaft cylinder is coaxial with the static mounting base and extends from the bottom of the static ring cavity towards the cavity opening, exceeding the cavity opening. The shaft cylinder has an axially extending shaft hole, which forms an opening on the outer side of the static mounting base for the passage of a rotating shaft. Correspondingly, a sleeve is formed in the central region of the moving ring cavity. The sleeve is coaxial with the moving mounting base and extends from the bottom of the moving ring cavity towards the cavity opening. The sleeve has an axially extending through hole, which forms an opening on the inner side of the moving mounting base for the passage of the shaft cylinder in the static ring cavity. The shaft cylinder is installed in the through hole of the sleeve, and the outer wall of the shaft cylinder is rotatably mounted to the inner wall of the sleeve via a bearing, thereby achieving rotational assembly between the static mounting base and the moving mounting base.

[0019] In some embodiments of this application, two rings of bearing mounting grooves spaced apart along the axial direction can be formed on the inner wall of the sleeve of the moving mounting base. One bearing is installed in each ring of bearing mounting groove. By configuring the moving mounting base to rotate with the stationary mounting base through the two bearings, the stability of the assembly between the stationary mounting base and the moving mounting base is improved.

[0020] In another aspect, this utility model proposes a floating sealing assembly, comprising:

[0021] A static mounting base includes a base having an inner side and an outer side opposite to each other; the inner side of the base forms a static ring cavity for mounting a static floating sealing ring, and the outer edge of the static ring cavity forms a stepped shape; an oil hole penetrating the static ring cavity is provided on the outer side of the base.

[0022] A movable mounting base includes a base having an outer side facing the stationary mounting base and an inner side opposite to the outer side; the outer side of the base forms a movable ring cavity for mounting a movable floating seal ring, the outer edge of the movable ring cavity forming a stepped structure adapted to the stepped outer edge of the stationary ring cavity, and the two stepped outer edges forming a stepped gap after assembly; an oil hole penetrating the movable ring cavity is provided on the inner side of the base;

[0023] A static floating sealing ring has a sealing ring installed on its outer circumference. The static floating sealing ring is fixedly assembled to the inner wall of the static ring cavity by the compression and deformation of the sealing ring.

[0024] A dynamic floating seal ring has a sealing ring installed on its outer circumference. The dynamic floating seal ring is fixedly assembled to the inner wall of the dynamic ring cavity by the compression deformation of the sealing ring.

[0025] The end faces of the static floating seal ring and the dynamic floating seal ring are fitted together to form an oil film sealing surface.

[0026] Compared with the prior art, the advantages and positive effects of this utility model are mainly reflected in:

[0027] 1. This utility model designs the gap between the two mounting bases as a stepped, meandering narrow slit, which makes it difficult for foreign objects to invade the cavity where the floating seal ring and the sealing ring are located, thereby protecting the floating seal ring and the sealing ring from damage by foreign objects. While extending the overall service life of the floating seal structure, it also solves the problem of internal lubricating oil leakage caused by the failure of the floating seal by preventing seal failure.

[0028] 2. This utility model allows the lubricating oil inside the floating seal ring to flow by opening oil holes on the two mounting seats. The flow of lubricating oil can carry away the heat generated by the relative rotation of the two floating seal rings, thereby avoiding the failure of the sealing ring due to the drastic increase in the temperature of the floating seal ring, which would lead to problems such as lubricating oil leakage.

[0029] 3. This utility model sets different oil hole distributions according to the different working conditions of the two mounting seats, thereby enhancing the fluidity of the lubricating oil inside the floating seal ring and improving the efficiency of heat dissipation and cooling.

[0030] 4. By opening a drain port at the bottom of the static mounting base, foreign objects that have entered the stepped gap can be automatically removed through the drain port and leave the mounting base. This further prevents foreign objects from entering the cavity where the floating seal ring and sealing ring are located, enhances the protection of the floating seal ring and sealing ring, and strengthens the anti-leakage effect of the internal lubricating oil.

[0031] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0033] Figure 1 This is a schematic diagram of one embodiment of the floating seal ring and O-ring;

[0034] Figure 2 This is a schematic diagram of a structural embodiment of an existing floating seal assembly;

[0035] Figure 3 This is a schematic diagram of the overall structure of one embodiment of the floating sealing assembly proposed in this utility model;

[0036] Figure 4 yes Figure 3 A schematic diagram of the floating seal assembly from another perspective;

[0037] Figure 5 yes Figure 3 An exploded structural diagram of one embodiment of the floating sealing assembly shown;

[0038] Figure 6 yes Figure 3 A cross-sectional view of the overall structure of one embodiment of the floating seal assembly shown;

[0039] Figure 7 yes Figure 6 The three-dimensional view corresponding to the floating seal assembly shown;

[0040] Figure 8 yes Figure 6A partially enlarged view of the floating seal assembly shown;

[0041] Figure 9 yes Figure 8 The three-dimensional view corresponding to the floating seal assembly shown;

[0042] Figure 10 yes Figure 3 A schematic diagram of the outer structure of one embodiment of the static mounting base;

[0043] Figure 11 yes Figure 10 A schematic diagram of the inner structure of the static mounting base shown.

[0044] Figure 12 yes Figure 10 The structural cross-sectional view of the static mounting base shown;

[0045] Figure 13 yes Figure 3 A schematic diagram of one embodiment of the central mounting bracket;

[0046] Figure 14 yes Figure 13 The diagram shows a sectional view of the movable mounting base.

[0047] Figure 15 It is Figure 3 The diagram shows a structural schematic of one embodiment of a floating seal assembly used in a wheel-side reducer.

[0048] In the diagram, 11. Floating seal ring; 12. Floating seal ring; 21. O-ring seal; 22. O-ring seal; 31. Mounting base; 32. Mounting base; 40. Gap; 50. Housing; 51. Bolt; 60. End cap; 61. Bolt; 100. Static mounting base; 110. Base; 111. Inner side of the base; 112. Outer side of the base; 113. Oil hole; 120. Static ring cavity; 121. Outer edge; 122. Groove; 123. Stepped structure; 124. Drain outlet; 125. Stepped surface; 130, Shaft sleeve; 131, Shaft hole; 200, Moving mounting base; 210, Base; 211, Outer side of base; 212, Inner side of base; 213, Oil hole; 220, Moving ring cavity; 221, Outer edge; 222, Groove; 223, Stepped structure; 230, Sleeve; 231, Through hole; 232, Bearing mounting groove; 310, Static floating seal ring; 311, Sealing ring; 320, Moving floating seal ring; 321, Sealing ring; 330, Bearing; 340, Bearing; 400, Stepped gap. Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0050] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "inner", "outer", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly 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 internal communication within components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0052] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0053] Combination Figures 3 to 5 As shown, the floating sealing assembly of this embodiment mainly includes a static mounting base 100 that is stationary during operation, a static floating sealing ring 310 and a sealing ring 311 installed in the static mounting base 100, and a dynamic mounting base 200 that is rotating during operation, a dynamic floating sealing ring 320 and a sealing ring 321 installed in the dynamic mounting base 200.

[0054] Combination Figures 10 to 12 As shown, the static mounting base 100 in this embodiment mainly includes a base 110. The side of the base 110 facing the dynamic mounting base 200 after the static mounting base 100 and the dynamic mounting base 200 are assembled together is defined as the inner side 111 of the base, and the side away from the dynamic mounting base 200 is defined as the outer side 112 of the base.

[0055] In some embodiments, such as Figure 10 As shown, the outer side 112 of the base can be designed as a planar circle, or a stepped circle in the middle area that is slightly higher than the surrounding area, or other shapes or structures that facilitate mounting the base 110 on other stationary components. This embodiment does not impose specific limitations on these aspects.

[0056] The inner side 111 of the substrate is recessed to form a stationary ring cavity 120 for mounting the stationary floating sealing ring 310 and the sealing ring 311. In some embodiments, such as Figure 11 As shown, the inner side 111 of the substrate can be designed as a cylinder with a diameter smaller than that of the outer side 112 of the substrate. One end is connected to the outer side 112 of the substrate, and the other end forms the outer edge 121 of the static ring cavity 120. The hollow area in the middle forms the static ring cavity 120.

[0057] To improve the stability of the static floating sealing ring 310 and sealing ring 311 in the static ring cavity 120, a groove 122 can be formed on the inner wall of the static ring cavity 120, such as... Figure 12 As shown. The sealing ring 311 is installed in the groove 122. The compression deformation generated after installation presses the sealing ring 311 tightly against the outer periphery of the static floating sealing ring 310, thus combining... Figure 8 , Figure 9 As shown, while meeting assembly requirements, it can also seal the internal lubricating oil.

[0058] In some embodiments, the groove 122 is preferably formed on the inner wall of the static ring cavity 120 near the bottom of the cavity, so as to leave an area on the inner wall near the cavity opening for foreign object prevention design.

[0059] Combination Figure 13 , Figure 14 As shown, the movable mounting base 200 in this embodiment mainly includes a base 210. The side of the base 210 facing the static mounting base 100 after the movable mounting base 200 and the static mounting base 100 are assembled together is defined as the outer side 211 of the base, and the side away from the static mounting base 100 is defined as the inner side 212 of the base.

[0060] The outer side 211 of the base is recessed to form a dynamic ring cavity 220 for mounting the dynamic floating seal ring 320 and the sealing ring 321. To improve the stability of the dynamic floating seal ring 320 and the sealing ring 321 within the dynamic ring cavity 220, a groove 222 can be formed on the inner wall of the dynamic ring cavity 220, such as... Figure 14 As shown. The sealing ring 321 is installed in the groove 222. The compression deformation generated after installation presses the sealing ring 321 tightly against the outer periphery of the dynamic floating seal ring 320, thus combining... Figure 8 , Figure 9 As shown, while meeting assembly requirements, it can also seal the internal lubricating oil.

[0061] In some embodiments, the groove 222 is preferably formed on the inner wall of the moving ring cavity 220 near the cavity opening, so that after the moving mounting seat 200 and the stationary mounting seat 100 are assembled together, the adjacent end faces of the moving floating seal ring 320 and the stationary floating seal ring 310 fit together to form an oil film sealing surface.

[0062] Since floating seal structures are commonly used in rotating devices, the rotating shaft in these devices typically needs to pass through the floating seal structure to connect to other rotating components that require its drive. Therefore, this embodiment designs a shaft sleeve 130 in the static mounting base 100 for the rotating shaft to pass through. Figure 11 As shown; a sleeve 230 is designed in the movable mounting base 200 for the shaft sleeve 130 to pass through, as follows. Figure 14 As shown. Bearings 330 and 340 are installed between the shaft sleeve 130 and the sleeve 230 to achieve rotational assembly between the static mounting base 100 and the dynamic mounting base 200.

[0063] In some embodiments, the shaft sleeve 130 can be installed in the central region of the stationary ring cavity 120, combined with Figure 10 , Figure 11 As shown, the shaft cylinder 130 is coaxial with the stationary mounting base 100 and extends axially from the bottom of the stationary annular cavity 120 toward the cavity opening, extending beyond the cavity opening. The shaft cylinder 130 is a hollow cylinder, with the hollow portion forming a shaft hole 131 extending axially. The diameter of the shaft hole 131 is larger than the diameter of the rotating shaft, and an opening is formed on the outer side 112 of the stationary mounting base 100 for the rotating shaft to pass through.

[0064] Accordingly, the sleeve 230 is installed in the central region of the moving ring cavity 220, in conjunction with... Figure 13 , Figure 14 As shown, the sleeve 230 is coaxial with the movable mounting base 200 and extends axially from the bottom of the moving ring cavity 220 towards the cavity opening, extending beyond the cavity opening. The sleeve 230 is a hollow cylinder, with the hollow portion forming a through hole 231 extending axially. The diameter of the through hole 231 is larger than the outer diameter of the shaft cylinder 130, and an opening is formed on the inner side 212 of the movable mounting base 200 for the shaft cylinder 130 to pass through.

[0065] When using, combine Figure 6 , Figure 7 As shown, the shaft sleeve 130 in the static mounting base 100 is inserted into the through hole 231 of the sleeve 230 in the dynamic mounting base 200. The free end of the shaft sleeve 130 can pass through the opening formed by the sleeve 230 on the inner side 212 of the dynamic mounting base 200, so as to improve the stability of the shaft sleeve 130 in the sleeve 230.

[0066] Bearings 330 and 340 are installed between the outer wall of the shaft cylinder 130 and the inner wall of the sleeve 230. During operation, the shaft cylinder 130 remains stationary with the stationary mounting seat 100, while the sleeve 230 rotates synchronously with the moving mounting seat 200. The bearings 330 and 340 not only meet the assembly requirements between the shaft cylinder 130 and the sleeve 230, but also meet the working requirements of the sleeve 230 rotating relative to the shaft cylinder 130.

[0067] To improve the stability of the assembly between the shaft sleeve 130 and the sleeve 230, this embodiment installs two bearings 330 and 340 between the shaft sleeve 130 and the sleeve 230, and two bearing mounting grooves 232 are formed on the inner wall of the sleeve 230. Figure 7 , Figure 14 As shown, two rings of bearing mounting grooves 232 are arranged at intervals along the axial direction of the sleeve 230. One bearing 330 / 340 is installed in each ring of bearing mounting grooves 232 to prevent axial displacement of bearings 330 and 340.

[0068] After the stationary mounting base 100 and the moving mounting base 200 are assembled together, the inner side of the stationary mounting base 100 and the outer side of the moving mounting base 200 are adjacent to each other, forming a gap. In order to prevent foreign objects from entering the stationary ring cavity 120 and / or the moving ring cavity 220 through the gap, and causing damage to the stationary floating seal ring 310, the moving floating seal ring 320 and / or the two sealing rings 311, 321, which would lead to sealing failure and oil leakage, this embodiment has a special design for the gap to reduce the possibility of foreign objects entering the cavity.

[0069] Specifically, in this embodiment, the inner side of the static mounting base 100 and the outer edge 121 of the static ring cavity 120 are designed as a stepped structure 123, such as... Figure 12 As shown. Simultaneously, the outer side of the moving mounting base 200 and the outer edge 221 of the moving ring cavity 220 are designed as a stepped structure 223 adapted to match the outer edge 121 of the stationary ring cavity 120, as shown. Figure 14 As shown. After the static mounting base 100 and the dynamic mounting base 200 are assembled together, the two stepped outer edges 121 and 221 mate to form a meandering stepped gap 400, which combines... Figure 6 , Figure 9 As shown, this design increases the difficulty for foreign objects such as mud and sand to enter the static ring cavity 120 and the dynamic ring cavity 220 through the stepped gap 400, thereby achieving the purpose of blocking foreign objects from entering.

[0070] In some embodiments, a stepped structure 123 can be formed on the inner side of the outer edge 121 of the stationary ring cavity 120, and a stepped structure 223 can be formed on the outer side of the outer edge 221 of the moving ring cavity 220. Thus, after the stationary mounting base 100 and the moving mounting base 200 are assembled, the outer edge 121 of the stationary ring cavity 120 covers the outer periphery of the outer edge 221 of the moving ring cavity 220. Since the stationary ring cavity 120 remains stationary with the stationary mounting base 100 during operation, while the moving ring cavity 220 rotates synchronously with the moving mounting base 200, the stationary stationary ring cavity 120 can protect the outer edge 221 of the moving ring cavity 220. Simultaneously, it facilitates the design of a drain port on the floating seal structure to discharge foreign objects entering the gap 400 from the mounting base.

[0071] In some embodiments, the stepped gap 400 can be configured to have two or three steps. If the working environment is a place with a lot of mud, sand, or dust, these foreign objects may intrude into the outermost stepped surface 125 of the stepped gap 400, that is, the stepped surface closest to the opening of the stationary ring cavity 120. In order to discharge these foreign objects, several notches can be opened on the outer edge 121 of the stationary ring cavity 120 to form a drain outlet 124, such as... Figure 11 As shown.

[0072] In some embodiments, multiple drain ports 124 may be formed in the region below the axis of the outer edge 121 of the stationary ring cavity 120. These drain ports 124 may extend axially from the outermost edge of the outer edge 121 of the stationary ring cavity 120 to the outermost stepped surface 125 of the stepped slit 400, or terminate before reaching the outermost stepped surface 125. Figure 12 As shown, this is to prevent foreign objects from easily entering the static ring cavity 120 through this gap if the opening is too deep.

[0073] Since the static mounting base 100 remains stationary during operation, the drain port 124 is located at the bottom inside the static mounting base 100. When foreign objects that have entered the stepped gap 400 are moved to the bottom of the static mounting base 100 as the moving mounting base 200 rotates, the foreign objects can fall through the drain port 124 under their own weight and leave the floating sealing assembly, thereby achieving the effect of removing foreign objects.

[0074] When the floating seal assembly is in operation, the moving floating seal ring 320 rotates at high speed relative to the stationary floating seal ring 310, generating a large amount of heat. This causes the temperature of the floating seal ring to rise sharply, which is then conducted to the sealing rings 311 and 321, causing them to fail and resulting in oil leakage. To solve this problem, this embodiment provides oil holes on the stationary mounting base 100 and the moving mounting base 200 to enhance the flow of lubricating oil in the floating seal ring and achieve a cooling effect.

[0075] Specifically, combined Figures 10 to 12 As shown, one or more oil holes 113 can be opened in the area below the axis of the static mounting base 100, and the oil holes 113 are configured to extend from the outer side 112 of the base to the stationary ring cavity 120 so that the lubricating oil in the cavity can flow through the oil holes 113.

[0076] In cases where multiple oil holes 113 are provided on the static mounting base 100, it is preferable that the multiple oil holes 113 are arranged in an arc with the axis of the static mounting base 100 as the center, such as... Figure 10 As shown; and, the openings formed by each oil hole 113 in the stationary ring cavity 120 are positioned directly opposite the hollow area enclosed by the inner ring of the stationary floating sealing ring 310, as shown. Figure 6 As shown, this ensures that the lubricating oil in the floating seal ring can flow more smoothly through the oil hole 113, carrying away more heat and achieving rapid cooling.

[0077] For the oil hole 213 opened on the moving mounting base 200, combined with Figure 13 , Figure 14 As shown, multiple oil holes 213 are preferably provided and arranged around the axis of the movable mounting base 200. These oil holes 213 extend from the inner side 212 of the base to the moving ring cavity 220, and the openings formed in the moving ring cavity 220 are directly opposite the hollow area enclosed by the inner ring of the moving floating seal ring 320. Since these oil holes 213 rotate synchronously with the movable mounting base 200 during operation, the circumferential distribution of the oil holes 213 on the movable mounting base 200 ensures that both the thrown and non-thrown lubricating oil can flow smoothly through these oil holes 213, thereby enhancing the fluidity of the lubricating oil.

[0078] Industrial applicability

[0079] The floating seal assembly of this embodiment is applied to the wheel-side reducer of an engineering vehicle, such as... Figure 15 As shown. The static mounting base 100 is connected to the housing 50 of the wheel-side reducer by bolts 51, and the housing 50 is fixedly mounted on the vehicle frame or chassis. The housing 50 is hollow and filled with lubricating oil to lubricate and cool the rotating components (such as reduction gears and bearings) in the wheel-side reducer. The dynamic mounting base 200 is connected to the end cover 60 in the wheel-side reducer by bolts 61, allowing the dynamic mounting base 200 to rotate synchronously with the end cover 60 (the end cover 60 connects to the rotating components in the wheel-side reducer, such as the wheel hub or planetary carrier). In this way, the lubricating oil in the wheel-side reducer lubricates the bearings 330 and 340 in the mounting base.

[0080] When the wheel-side reducer is working, the moving mounting base 200 rotates with the end cover 60, causing the moving floating seal ring 320 and sealing ring 321 inside its moving ring cavity 220 to rotate synchronously, while the stationary mounting base 100 and its internal stationary floating seal ring 310 and sealing ring 311 remain stationary. At this time, relative rotation occurs between the stationary floating seal ring 310 and the moving floating seal ring 320, and an oil film is formed between the contact surfaces of the two floating seal rings, which plays a role in sealing the internal lubricating oil. At the same time, the two floating seal rings generate heat due to contact friction, causing the temperature of the floating seal rings to rise sharply.

[0081] In this embodiment, oil holes 113 and 213 are provided on the static mounting base 100 and the dynamic mounting base 200, so that the lubricating oil inside the floating seal ring can flow through the oil holes 113 and 213 into the housing 50 of the wheel-side reducer, thereby carrying away the heat generated by the rotational friction of the two floating seal rings, reducing the temperature of the floating seal rings, and thus preventing the sealing rings 311 and 321 fitted on them from failing due to excessive temperature, which could lead to problems such as lubricating oil leakage.

[0082] When construction vehicles travel on muddy roads, mud and gravel adhering to the wheels may fall onto the mounting base of the floating seal assembly. When foreign objects such as mud and gravel seep into the stepped gap 400 formed between the static mounting base 100 and the moving mounting base 200, the stepped, meandering structure of the gap effectively prevents further intrusion, blocking the foreign objects at the outermost stepped surface 125. Foreign objects that have entered the stepped gap 400 rotate with the moving mounting base 200. When the foreign object rotates to the bottom of the static mounting base 100, it can fall off the floating seal assembly through the drain port 124 on the static mounting base 100 under its own weight, thus achieving a drainage effect. This further prevents the intrusion of foreign objects, avoiding oil leakage caused by seal failure and extending the service life of the floating seal assembly.

[0083] Of course, the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A floating seal mount, characterized by, include: A static mounting base includes a base having an inner side and an outer side opposite to each other; the inner side of the base forms a static ring cavity for mounting a static floating sealing ring, and the outer edge of the static ring cavity forms a stepped shape; an oil hole penetrating the static ring cavity is provided on the outer side of the base. A dynamic mounting base includes a base having an outer side facing the static mounting base and an inner side opposite to the outer side; the outer side of the base forms a dynamic ring cavity for mounting a dynamic floating seal ring, the outer edge of the dynamic ring cavity forming a stepped structure adapted to the stepped outer edge of the static ring cavity, and the two stepped outer edges forming a stepped gap after assembly; an oil hole penetrating the dynamic ring cavity is provided on the inner side of the base.

2. The floating seal mounting base according to claim 1, characterized in that, The inner side of the outer edge of the static ring cavity forms a stepped shape; The outer edge of the moving ring cavity forms a stepped shape; After the two stepped outer edges are assembled, the outer edge of the stationary ring cavity covers the outer periphery of the outer edge of the moving ring cavity.

3. The floating seal mounting base according to claim 2, characterized in that, A groove for installing a sealing ring is formed on the inner wall of the stationary ring cavity near the bottom of the cavity. The sealing ring is used to install on the stationary floating sealing ring. A groove for installing a sealing ring is formed on the inner wall of the moving ring cavity at the cavity opening. The sealing ring is used to install on the moving floating sealing ring.

4. The floating seal mounting base according to claim 1, characterized in that, The oil hole formed on the stationary mounting base is located in the area below the axis of the stationary mounting base; The oil holes formed on the movable mounting base include multiple holes, which are arranged around the axis of the movable mounting base.

5. The floating seal carrier of claim 4, wherein, The oil holes formed on the static mounting base include multiple holes, which are arranged in an arc with the axis of the static mounting base as the center.

6. The floating seal mounting base according to claim 4 or 5, characterized in that, The oil hole formed on the static mounting base has an opening in the static ring cavity that faces the hollow area enclosed by the inner ring of the static floating sealing ring. The oil hole formed on the moving mounting base has an opening in the moving ring cavity that faces the hollow area enclosed by the inner ring of the moving floating seal ring.

7. The floating seal carrier of any of claims 1-5, wherein, Several notches are provided on the outer edge of the static ring cavity, and the notches form drain outlets, which are distributed in the area below the axis of the outer edge; the drain outlets extend axially from the outermost edge to the outermost stepped surface or terminate before reaching the outermost stepped surface.

8. The floating seal mounting base according to any one of claims 1 to 5, characterized in that, A shaft cylinder is formed in the central region of the stationary ring cavity. The shaft cylinder is coaxial with the stationary mounting base and extends from the bottom of the stationary ring cavity toward the cavity opening and beyond the cavity opening. The shaft cylinder has an axially extending shaft hole, which forms an opening on the outside of the stationary mounting base. A sleeve is formed in the central region of the moving ring cavity. The sleeve is coaxial with the moving mounting base and extends from the bottom of the moving ring cavity to the cavity opening. The sleeve has a through hole extending in the axial direction, and the through hole forms an opening on the inner side of the moving mounting base. The shaft is installed in the through hole of the sleeve, and the outer wall of the shaft is rotatably mounted on the inner wall of the sleeve via a bearing.

9. The floating seal carrier of claim 8, wherein, Two rings of bearing mounting grooves are provided on the inner wall of the sleeve of the moving mounting base, arranged at intervals along the axial direction. One bearing is installed in each ring of bearing mounting groove. The moving mounting base is rotatably assembled with the stationary mounting base through the two bearings.

10. A floating seal assembly characterized by, Includes a static floating seal ring, a dynamic floating seal ring, and a floating seal mounting base as described in any one of claims 1 to 9; wherein, A sealing ring is installed on the outer periphery of the static floating sealing ring, and the static floating sealing ring is fixedly assembled to the inner wall of the static ring cavity by the compression deformation of the sealing ring; A sealing ring is installed on the outer periphery of the dynamic floating seal ring, and the dynamic floating seal ring is fixedly assembled to the inner wall of the dynamic ring cavity by the compression deformation of the sealing ring; The end faces of the static and dynamic floating sealing rings fit together to form an oil film sealing surface.

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