Mounting device and mounting method for a sealing assembly

Abstract

This disclosure provides an installation device and method for a sealing assembly, belonging to the field of mechanical seal technology. The installation device includes an operating member and a positioning ring. Along the axial direction of the positioning ring, the operating member is located on one side of the positioning ring and connected to it. The operating member is used to insert into the gap between the fixed base and the rotating shaft tube. The positioning ring has an annular mounting groove on the side away from the operating member, which is used to accommodate the lip seal ring. This disclosure can improve the installation quality of the sealing assembly and enhance the sealing effect.

Description

Technical Field

[0001] This disclosure belongs to the field of mechanical seal technology, and specifically relates to an installation device and method for a sealing component. Background Technology

[0002] In a podded propulsion system, the slewing unit comprises a fixed base and a slewing shaft tube. The slewing shaft tube is located within the fixed base, which is a fixed component connected to the hull. When the podded propulsion system operates, the slewing shaft tube rotates relative to the fixed base. Since the lower part of the fixed base is submerged in seawater, a sealing assembly is used to prevent seawater from entering the slewing unit. This sealing assembly includes multiple lip seals and multiple spacer rings. Each lip seal is located between two adjacent spacer rings. To prevent oil leakage from inside the slewing unit and to prevent external water from entering, the lip of the lip seal closest to the interior of the slewing unit faces inwards (i.e.,...) Figure 2 The lip of the sealing ring, located in the upward direction, faces outwards from the rotating unit, while the lower part of the sealing ring near the fixed base faces outwards from the fixed base (i.e., the direction from the center upwards). Figure 2 (The direction from the center downwards).

[0003] In related technologies, the installation method of the sealing components mentioned above is usually along the direction from the outside to the inside of the rotating unit (that is... Figure 2 Install the lip seals into the fixed base sequentially from bottom to top, and then push the rotary shaft tube into the inner hole of the fixed base from bottom to top.

[0004] However, since the lip of the lower lip seal faces downwards, which is opposite to the insertion direction of the rotary shaft tube, the lip of the lip seal is very easily torn during the upward lifting of the rotary shaft tube, and this is not easily noticed, thus affecting the sealing effect. Summary of the Invention

[0005] This disclosure provides an installation device and method for a sealing assembly, which can improve the installation quality of the sealing assembly and enhance the sealing effect. The technical solution is as follows:

[0006] This disclosure provides an installation device for a sealing assembly, which is installed between a fixed base and a rotating shaft tube in a pod thruster. The sealing assembly includes at least one lip seal. The installation device includes an operating member and a positioning ring. Along the axial direction of the positioning ring, the operating member is located on one side of the positioning ring and connected to the positioning ring. The operating member is used to insert into the gap between the fixed base and the rotating shaft tube. The positioning ring has an annular mounting groove on the side away from the operating member. The mounting groove is used to accommodate the lip seal, and the groove wall is used to fit against the lip edge of the lip seal.

[0007] In another implementation of this disclosure, the wall of the mounting groove includes a first conical surface, the outer diameter of which gradually decreases in the direction from the operating member to the positioning ring.

[0008] In another implementation of this disclosure, the groove wall of the mounting groove further includes a second conical surface, which is located on the side of the first conical surface away from the operating member and is connected to the first conical surface. The outer diameter of the second conical surface gradually increases from the operating member to the positioning ring.

[0009] In another implementation of this disclosure, the outer peripheral wall of the positioning ring has a plurality of demolding grooves arranged at intervals along its own circumference, the demolding grooves being located on the side of the mounting groove facing the operating member, and the demolding grooves extending along the circumference of the positioning ring.

[0010] In another implementation of this disclosure, the operating element includes a plurality of connecting rods arranged at circumferential intervals along the positioning ring, and each of the plurality of connecting rods is connected to the positioning ring.

[0011] In another implementation of this disclosure, a method for installing a sealing assembly is also provided. The sealing assembly includes at least one lip seal. The installation method includes: installing the lip seal in a mounting groove on a positioning ring of an installation device, the installation device being the installation device described above; placing the positioning ring containing the lip seal in the gap between a fixed base and a rotating shaft tube using an operating member of the installation device; and controlling the operating member to disengage the lip seal from the positioning ring.

[0012] In another implementation of this disclosure, the step of installing the lip seal in the mounting groove on the positioning ring of the mounting device includes: expanding the lip of the lip seal radially outward so that the lip fits against the groove wall of the mounting groove. The groove wall of the mounting groove includes a first conical surface and a second conical surface. The second conical surface is located on the side of the first conical surface away from the operating member. From the operating member to the positioning ring, the outer diameter of the second conical surface gradually increases, and the outer diameter of the first conical surface gradually decreases. The maximum outer diameter of both the first conical surface and the second conical surface is greater than the inner diameter corresponding to the lip of the lip seal.

[0013] In another implementation of this disclosure, controlling the operating member to disengage the lip seal from the positioning ring includes: rotating the operating member so that the positioning ring can rotate relative to the fixed base and the rotating shaft tube through a demolding groove in its outer periphery, wherein there are multiple demolding grooves arranged at intervals along the outer periphery of the positioning ring and extending along the circumference of the positioning ring; and lifting the operating member to separate the positioning ring from the lip seal.

[0014] In another implementation of this disclosure, before placing the positioning ring with the lip seal ring in the gap between the fixed base and the rotary shaft tube by means of the operating component of the installation device, the installation method further includes: assembling the fixed base and the rotary shaft tube such that the rotary shaft tube is coaxial with the fixed base and the width of the gap is the same in the circumference of the rotary shaft tube.

[0015] In another implementation of this disclosure, the sealing assembly further includes an intermediate spacer ring, and the installation method further includes installing the intermediate spacer ring in the gap between the fixed base and the rotary shaft tube before or after the installation of each lip seal ring.

[0016] The beneficial effects of the technical solutions provided in this disclosure are:

[0017] When installing a sealing assembly using the installation device provided in this embodiment, the lip seal to be installed can be placed in the mounting groove of the positioning ring, allowing the lip seal to be fitted onto the installation device while simultaneously protecting the lip edge of the lip seal. Next, since the operating member is inserted into the gap between the fixed base and the rotating shaft tube, it can be controlled to move the positioning ring and the lip seal on it between the fixed base and the rotating shaft tube. This allows the lip seal to be moved between the fixed base and the rotating shaft tube. Then, by controlling the operating member again, the lip seal can be disengaged from the positioning ring. Finally, by removing the operating member from between the fixed base and the rotating shaft tube, the lip seal can be installed between the fixed base and the rotating shaft tube. Furthermore, since the operating member and the mounting groove are located on opposite sides of the positioning ring, during installation, simply twisting or shaking the operating member is sufficient to separate the lip seal from the mounting groove, making the installation process simple and quick.

[0018] Furthermore, in order to ensure that the lip of the lip seal faces upward or downward, during installation, the lip direction of the lip seal only needs to be pre-adjusted when the lip seal is placed in the mounting groove.

[0019] It is evident that the above installation device can improve the installation effect of the lip seal and prevent damage to the lip seal. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the rotating unit in a podded thruster.

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a schematic diagram of the installation device provided in an embodiment of the present disclosure;

[0024] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0025] Figure 5 This is a schematic diagram of the installation of a lip seal with the lip facing downwards in a positioning ring;

[0026] Figure 6This is a schematic diagram of the installation of a lip seal with the lip facing upwards in a positioning ring;

[0027] Figure 7 This is a schematic diagram of the installation of a lip-shaped sealing ring with the lip facing downwards in another type of positioning ring;

[0028] Figure 8 This is a schematic diagram of the installation of a lip-shaped sealing ring with the lip facing upward in another type of positioning ring;

[0029] Figure 9 for Figure 3 Top view;

[0030] Figure 10 A flowchart illustrating a method for installing a sealing assembly according to an embodiment of this disclosure;

[0031] Figure 11 This is a schematic diagram of the installation of a lip seal ring on the installation device provided in the embodiments of this disclosure.

[0032] The symbols in the diagram represent the following meanings:

[0033] 100. Sealing assembly; 101. Lip seal; 1011. Lip edge; 102. Spacer ring; 1020. Oil hole;

[0034] 200. Mounting device; 201. Operating component; 2011. Connecting rod; 202. Positioning ring; 2020. Mounting groove; 2021. First conical surface; 2022. Second conical surface; 2023. Demolding groove;

[0035] 300. Rotary unit; 301. Fixed base; 302. Rotary shaft tube; 303. Sealing groove; 304. High-speed rail, etc. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0037] Figure 1 This is a structural diagram of the slewing unit in the podded thruster, combined with... Figure 1 In the pod propulsion system, the slewing unit 300 includes a fixed base 301 and a slewing shaft tube 302. The slewing shaft tube 302 is partially located within the fixed base 301.

[0038] The fixed base 301 and the rotating shaft tube 302 are a pair of relatively rotating parts. The fixed base 301 is a fixed part that is connected to the hull, while the rotating shaft tube 302 is a moving part.

[0039] When the pod thruster is operating, the slewing shaft tube 302 will rotate relative to the fixed base 301. Since the bottom of the fixed base 301 is immersed in seawater, the slewing shaft tube 302 and the fixed base 301 are sealed by a sealing assembly 100 to prevent seawater from entering the interior of the slewing unit 300.

[0040] Figure 2 for Figure 1 Enlarged view of point A in the middle, combined with Figure 2 To facilitate the installation of the sealing assembly 100, an annular sealing groove 303 is provided in the side wall of the inner hole of the fixed base 301, and the sealing assembly 100 is located in the sealing groove 303.

[0041] The sealing assembly 100 includes a plurality of lip seals 101 and a plurality of spacer rings 102. Each lip seal 101 is located between two adjacent spacer rings 102.

[0042] In this embodiment, there are four lip seals 101 and five intermediate spacer rings 102.

[0043] Each intermediate spacer ring 102 has an oil hole 1020 along its own radial direction, with both ends of the oil hole 1020 penetrating the inner and outer walls of the intermediate spacer ring 102. The oil hole 1020 is used to introduce lubricating grease to the outside of the rotary shaft tube 302 for lubrication and cooling of the rotary shaft tube 302.

[0044] To prevent oil leakage inside the rotary unit 300 and to prevent external water from entering the rotary unit 300, the area near the interior of the rotary unit 300 (i.e., Figure 2 The lip 1011 of the lip seal 101 (located above the rotating unit 300) is upward (lip opening upward, i.e., facing the inside of the rotating unit 300), while the outer part near the fixed base 301 (i.e., the outer part of the lip seal 101) is upward (lip opening upward, i.e., facing the inside of the rotating unit 300), while the outer part near the fixed base 301 is... Figure 2 The lip 1011 of the lip seal 101 (located below) faces downward (the lip faces downward, i.e. towards the outside of the fixed base 301).

[0045] This disclosure provides an installation device and method for a sealing assembly, used to install the lip seal 101 of the aforementioned sealing assembly 100 in the sealing groove 303 between the fixed base 301 and the rotating shaft tube 302, in order to prevent the lip seal 101 from being damaged during installation as in related technologies, thereby improving the installation effect of the sealing assembly.

[0046] Figure 3 This is a schematic diagram of the installation device provided in the embodiments of this disclosure, combined with... Figure 3 The installation device 200 includes an operating element 201 and a positioning ring 202.

[0047] Along the axial direction of the positioning ring 202, the operating member 201 is located on one side of the positioning ring 202 and connected to the positioning ring 202. The operating member 201 is used to insert into the gap between the fixed base 301 and the rotary shaft tube 302.

[0048] Figure 4 for Figure 3 The enlarged view at point B in the middle, combined with Figure 4 The locating ring 202 has an annular mounting groove 2020 on the side away from the operating member 201. The mounting groove 2020 is used to accommodate the lip seal 101. The groove wall of the mounting groove 2020 is used to fit against the lip edge 1011 of the lip seal 101.

[0049] When the sealing assembly 100 is installed using the installation device provided in this embodiment, the lip seal 101 to be installed can be placed in the installation groove 2020 in the positioning ring 202, so that the lip seal 101 can be assembled on the installation device, and at the same time, the lip edge 1011 of the lip seal 101 can be protected. Next, since the operating member 201 is used to insert into the gap between the fixed base 301 and the rotary shaft tube 302, the operating member 201 can be controlled so that the positioning ring 202 and the lip seal 101 on the positioning ring 202 can be moved between the fixed base 301 and the rotary shaft tube 302. In this way, the lip seal 101 can be moved between the fixed base 301 and the rotary shaft tube 302 by the operating member 201. Then, the operating member 201 can be controlled so that the lip seal 101 can be disengaged from the positioning ring 202. Finally, the operating member 201 can be removed from the gap between the fixed base 301 and the rotary shaft tube 302, so that the lip seal 101 can be installed between the fixed base 301 and the rotary shaft tube 302. Furthermore, since the operating component 201 and the mounting groove 2020 are located on opposite sides of the positioning ring 202, during installation, the lip seal 101 can be separated from the mounting groove 2020 simply by gently twisting or shaking the operating component 201, making the installation process simple and quick.

[0050] Furthermore, in order to make the lip of the lip seal 101 face upward or downward, during installation, the lip direction of the lip seal 101 only needs to be pre-adjusted when the lip seal 101 is placed in the mounting groove 2020.

[0051] It is evident that the above installation device can improve the installation effect of the lip seal 101 and prevent damage to the lip seal 101.

[0052] See also Figure 4 Optionally, the groove wall of the mounting groove 2020 includes a first conical surface 2021, and the outer diameter of the first conical surface 2021 gradually decreases in the direction from the operating member 201 to the positioning ring 202.

[0053] In the above implementation, since the sealing component 100 in the rotary unit 300 includes multiple lip seals 101 with different lip directions, in order to facilitate the quick disengagement of the lip seal 101 from the mounting groove 2020 after the lip seal 101 with the lip facing downward and the positioning ring 202 are assembled together in the gap, the groove wall of the mounting groove 2020 is set as a first conical surface 2021. The first conical surface 2021 can reduce the contact area between the mounting groove 2020 and the lip edge 1011 of the lip seal 101 with the lip facing downward, so that the mounting groove 2020 can assemble the lip seal 101 with the lip facing downward while facilitating the disengagement of the lip seal 101 from the positioning ring 202.

[0054] Figure 5 This is a schematic diagram showing the installation of a lip seal with the lip facing downwards in a positioning ring, combined with... Figure 5 For example, when the lip seal 101 with its lip facing downwards needs to be placed outside the positioning ring 202, the lip seal 101 can be squeezed first, causing the lip edge 1011 of the lip seal 101 to expand outwards along its own radial direction. This reduces the opening of the lip of the lip seal 101, allowing the lip seal 101 to fit over the positioning ring 202, with the bottom of the lip seal 101 located in the mounting groove 2020. The side wall of the lip edge 1011 of the lip seal 101 is tightly fitted against the outer wall of the larger outer diameter end of the first conical surface 2021. In this way, the contact area between the positioning ring 202 and the lip edge 1011 of the lip seal 101 can be reduced through the conical surface, facilitating their separation.

[0055] See also Figure 4 Optionally, the groove wall of the mounting groove 2020 also includes a second conical surface 2022. The second conical surface 2022 is located on the side of the first conical surface 2021 away from the operating member 201 and is connected to the first conical surface 2021. The outer diameter of the second conical surface 2022 gradually increases from the operating member 201 to the positioning ring 202.

[0056] The maximum outer diameter of both the first conical surface 2021 and the second conical surface 2022 is greater than the inner diameter corresponding to the lip edge 1011 of the lip seal ring 101.

[0057] In the above implementation, since the sealing component 100 in the rotary unit 300 includes multiple lip seals 101 with different lip directions, in order to facilitate the assembly of the lip seals 101 with the lip facing upward and the positioning ring 202 together in the gap, and to enable the lip seals 101 to quickly detach from the mounting groove 2020, the groove wall of the mounting groove 2020 is set as a second conical surface 2022. The second conical surface 2022 can reduce the contact area between the mounting groove 2020 and the lip edge 1011 of the lip seals 101 with the lip facing upward, so that the mounting groove 2020 can assemble the lip seals 101 with the lip facing upward while facilitating the lip seals 101 to detach from the positioning ring 202.

[0058] Figure 6 This is a schematic diagram showing the installation of a lip seal with the lip facing upwards in a positioning ring, combined with... Figure 6 When the lip-shaped sealing ring 101 with its lip facing upwards needs to be placed outside the positioning ring 202, the lip-shaped sealing ring 101 can be squeezed first, causing the lip edge 1011 of the lip-shaped sealing ring 101 to expand outwards, reducing the opening of the lip edge. The lip-shaped sealing ring 101 then fits over the positioning ring 202, ensuring that the sidewall of the lip edge of the lip-shaped sealing ring 101 is tightly fitted against the outer wall of the larger outer diameter end of the second conical surface 2022. This reduces the contact area between the positioning ring 202 and the lip edge 1011 of the lip-shaped sealing ring 101 through the conical surface, facilitating their separation.

[0059] Figure 7 This is a schematic diagram showing the installation of a lip-shaped sealing ring with the lip facing downwards in another type of positioning ring. Figure 8 This is a schematic diagram showing the installation of a lip seal with the lip facing upwards in another type of locating ring. (See attached diagram) Figure 7 and Figure 8 In other examples, the first conical surface 2021 and the second conical surface 2022 can be respectively set in different positioning rings 202. That is, two types of positioning rings 202 are set, one of which has the first conical surface 2021 as the conical surface of its outer wall (see Figure 7 Another type of positioning ring 202 has a tapered outer wall surface called a second tapered surface 2022 (see [reference]). Figure 8 This also allows for the installation of lip seals 101 with different lip orientations.

[0060] Alternatively, instead of providing the second conical surface 2022, a first conical surface 2021 can be provided only on the side wall of the mounting groove 2020. The lip seal 101 with the lip facing downwards can be installed directly through the positioning ring 202. The installation of the lip seal 101 with the lip facing upwards can be done manually. Because the lip direction of the lip seal 101 with the lip facing upwards is along the installation direction (from top to bottom), it will not cause damage to the lip edge of the lip seal 101.

[0061] Figure 9 for Figure 3 Top view, combined Figure 9 Optionally, the outer peripheral wall of the positioning ring 202 has a plurality of demolding grooves 2023 arranged at intervals along its own circumference. The demolding grooves 2023 are located on the side of the mounting groove 2020 facing the operating member 201, and the demolding grooves 2023 extend along the circumference of the positioning ring 202. That is, the demolding grooves 2023 are located on the circumference corresponding to the largest outer diameter of the positioning ring 202.

[0062] In the above implementation, the demolding groove 2023 can further reduce the contact area between the positioning ring 202 and the fixed base 301 and the rotary shaft tube 302 respectively, thereby reducing the friction between the positioning ring 202 and the fixed base 301 and the rotary shaft tube 302, which is conducive to the positioning ring 202 disengaging from the fixed base 301 and the rotary shaft tube 302.

[0063] In other examples, the demolding groove 2023 may also have other structures, such as multiple small holes spaced apart on the outer peripheral wall of the positioning ring 202 or multiple balls embedded in the outer peripheral of the positioning ring 202, etc., as long as the friction between the positioning ring 202 and the fixed base 301 and the rotating shaft tube 302 can be reduced, and this disclosure does not limit it.

[0064] In this embodiment, there are four demolding grooves 2023, which are arc-shaped. The four demolding grooves 2023 are evenly arranged on the outer periphery of the positioning ring 202 (that is, the outer periphery of the circumference of the bottom of the mounting groove 2020).

[0065] The central angle β corresponding to the arc length of each demolding groove 2023 along the circumferential direction of the positioning ring 202 is not less than 10°. This ensures that the arc length of the demolding groove 2023 is not too short, increasing the area occupied by the demolding groove 2023 in the gap between the fixed base 301 and the rotating shaft tube 302. This reduces the contact area between the positioning ring 202 and the gaps between the fixed base 301 and the rotating shaft tube 302, reducing friction between the positioning ring 202 and the fixed base 301 and the rotating shaft tube 302, which is beneficial for the positioning ring 202 to disengage from the gap between the fixed base 301 and the rotating shaft tube 302.

[0066] For example, the central angle β corresponding to the arc length of each demolding groove 2023 along the circumferential direction of the positioning ring 202 is 15°.

[0067] Optionally, the operating element 201 includes a plurality of connecting rods 2011, which are arranged at intervals along the circumference of the positioning ring 202, and each of the plurality of connecting rods 2011 is connected to the positioning ring 202.

[0068] In the above implementation, the operating member 201 is set as multiple connecting rods 2011, and the positioning ring 202 can be operated by multiple connecting rods 2011 so that the positioning ring 202 can be stably located in the gap between the fixed base 301 and the rotary shaft tube 302.

[0069] Furthermore, by setting the operating member 201 as multiple connecting rods 2011, the operating member 201 can be easily positioned in the gap between the fixed base 301 and the rotary shaft tube 302 through the form of rods, while also facilitating connection with the positioning ring 202.

[0070] In other examples, the operating element 201 can also be other connecting elements, such as connecting ropes. As long as the operating element 201 can be located in the gap between the fixed base 301 and the rotating shaft tube 302, and can be connected to the positioning ring 202, this disclosure does not impose any restrictions.

[0071] In this embodiment, there are four connecting rods 2011, which are evenly arranged around the circumference of the positioning ring 202. This ensures that the positioning ring 202 remains balanced under the connection of the connecting rods 2011.

[0072] The minimum included angle α between each connecting rod 2011 and the adjacent demolding groove 2023 is 30 degrees. That is, the arc length between each demolding groove 2023 and its two adjacent connecting rods 2011 is the same.

[0073] The outer diameter of the positioning ring 202 is slightly smaller than the outer diameter of the mounting lip seal 101 outside the fixed base 301, typically by about 2 mm. The inner diameter of the positioning ring 202 is slightly larger than the outer diameter of the rotary shaft tube 302, typically by about 3 mm. This ensures that the mounting device can be smoothly inserted into the gap between the fixed base 301 and the rotary shaft tube 302.

[0074] The positioning ring 202 is provided with screw holes for connecting the connecting rod 2011.

[0075] After the lip seal 101 is installed onto the positioning ring 202, the entire device is placed into the sealing groove 303 of the lip seal 101 via the connecting rod 2011. Once the lip seal 101 is in place, the positioning ring 202 is removed. The positioning ring 202 is also provided with a demolding groove 2023. When the installation device carrying the lip seal 101 is positioned in the installation position, the lip seal 101 is separated from the positioning ring 202 through the demolding groove 2023. Then, the installation device is removed, and the lip seal 101 can be installed into the sealing groove 303. The first conical surface 2021 and the second conical surface 2022 on the positioning ring 202 are located at the contact surface of the lip 1011, which facilitates the smooth separation of the lip seal 101 from the positioning ring 202.

[0076] When using the installation device to install the lip seal, the lip seal can be easily installed into the sealing groove 303. At the same time, during the installation process, the lip edge 1011 of the lip seal 101 will be well protected, avoiding the damage to the lip edge 1011 that would occur during conventional installation.

[0077] On the other hand, this disclosure also provides a method for installing a sealing component, which installs the sealing component in the gap between the fixed base 301 and the rotary shaft tube 302 using the aforementioned installation device.

[0078] Figure 10 A flowchart illustrating an installation method for a sealing assembly provided in this disclosure, in conjunction with... Figure 10 Installation methods include:

[0079] S101: Install the lip seal ring into the mounting groove on the positioning ring of the mounting device.

[0080] The mounting device is the same as the one mentioned above, and will not be described again here.

[0081] Figure 11 This is a schematic diagram of the installation of a lip seal ring on the installation device provided in the embodiments of this disclosure, in conjunction with... Figure 11 During installation, the lip seal 101 is pre-assembled in the mounting groove 2020 so that the lip seal 101 can be installed in the gap between the fixed base 301 and the rotary shaft tube 302 by controlling the operating element 201.

[0082] In this embodiment, during installation, the lip 1011 of the lip seal ring 101 can be expanded outward along its own radial direction so that the lip 1011 fits against the groove wall of the mounting groove 2020.

[0083] In other words, when the lip seal 101 with its lip facing downwards needs to be placed outside the positioning ring 202, the lip seal 101 can be squeezed first, causing the lip edge 1011 of the lip seal 101 to expand outwards, the opening size of the lip of the lip seal 101 to become smaller, the lip seal 101 to fit outside the positioning ring 202, and the bottom of the lip seal 101 to be located in the mounting groove 2020, and the side wall of the lip edge of the lip seal 101 to be tightly fitted with the outer wall of the larger outer diameter end of the first conical surface 2021.

[0084] When the lip seal 101 with its lip facing upwards needs to be placed outside the positioning ring 202, the lip seal 101 can be squeezed first, causing the lip edge 1011 of the lip seal 101 to expand outwards, reducing the opening size of the lip of the lip seal 101. The lip seal 101 then fits over the positioning ring 202, ensuring that the sidewall of the lip edge of the lip seal 101 is tightly fitted against the outer wall of the end with the larger outer diameter of the second conical surface 2022.

[0085] S102: By using the operating component of the installation device, the positioning ring equipped with the lip seal is placed in the gap between the fixed base and the rotating shaft tube.

[0086] Combination Figure 11 By moving the operating component 201 to the gap between the fixed base 301 and the rotary shaft tube 302, the lip seal 101 can be moved together into the gap between the fixed base 301 and the rotary shaft tube 302.

[0087] S103: Control the operating element to disengage the lip seal from the positioning ring.

[0088] Optionally, step S103 can be implemented as follows:

[0089] (1) Rotate the operating component so that the positioning ring can rotate relative to the fixed base and the rotary shaft tube through the demolding groove in its outer periphery.

[0090] (2) Pull up the operating component to separate the positioning ring 202 from the lip seal.

[0091] This allows the demolding groove 2023 to reduce the contact area between the positioning ring 202 and the fixed base 301 and the rotating shaft tube 302 respectively, thereby reducing the friction between the positioning ring 202 and the fixed base 301 and the rotating shaft tube 302, making it easier for the positioning ring 202 to detach from the fixed base 301 and the rotating shaft tube 302.

[0092] Optionally, the installation method further includes the following steps before installing the lip seal (i.e., before step S101):

[0093] Assemble the fixed base 301 and the rotary shaft tube 302 so that the rotary shaft tube 302 is coaxial with the fixed base 301 and the width of the gap is the same in the circumference of the rotary shaft tube 302.

[0094] Combination Figure 11 The fixed base 301 can be placed on the same high-speed rail 304, its upper plane can be leveled, and then the rotary shaft tube 302 can be inserted into the inner hole of the fixed base 301 through the corresponding positioning fixture. Furthermore, the rotary shaft tube 302 and the fixed base 301 can be adjusted to be coaxial so that the dimensions of the sealing groove 303 are uniform in the circumference.

[0095] Optionally, after each lip seal is installed, the installation method further includes:

[0096] Before or after installing the lip seal, install the spacer ring in the sealing groove, with the lip seal positioned between two adjacent spacers.

[0097] Alternatively, the installation method may also include:

[0098] After the sealing assembly is installed, use the upper pressure plate to press the entire sealing assembly firmly.

[0099] This allows the lip of the lip seal to extend and fit tightly against the outer circumference of the rotating shaft tube, thus achieving a sealing effect.

[0100] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. An installation device for a seal assembly, characterized in that The sealing assembly is installed between the fixed base (301) and the rotating shaft tube (302) in the pod thruster, and the sealing assembly (100) includes at least one lip seal (101). The mounting device (200) includes an operating member (201) and a positioning ring (202). Along the axial direction of the positioning ring (202), the operating member (201) is located on one side of the positioning ring (202) and connected to the positioning ring (202). The operating member (201) is used to insert into the gap between the fixed base (301) and the rotary shaft tube (302). The positioning ring (202) has an annular mounting groove (2020) on the side away from the operating member (201). The mounting groove (2020) is used to accommodate the lip seal (101), and the groove wall of the mounting groove (2020) is used to fit against the lip edge (1011) of the lip seal (101). The groove wall of the mounting groove (2020) includes a first conical surface (2021) and a second conical surface (2022). From the operating member (201) to the positioning ring (202), the outer diameter of the first conical surface (2021) gradually decreases. The first conical surface (2021) is used to reduce the contact area between the mounting groove (2020) and the lip edge (1011) of the lip seal ring (101) with its lip facing the outside of the fixed base (301). The second conical surface (2022) is located on the side of the first conical surface (2021) away from the operating member (201) and is connected to the first conical surface (2021). From the operating member (201) to the positioning ring (202), the outer diameter of the second conical surface (2022) gradually increases. The second conical surface (2022) is used to reduce the contact area between the mounting groove (2020) and the lip edge (1011) of the lip seal ring (101) with its lip facing the interior of the rotary unit (300). The outer peripheral wall of the positioning ring (202) has four demolding grooves (2023) evenly spaced along its circumference. The demolding grooves (2023) are located on the side of the mounting groove (2020) facing the operating member (201), and the demolding grooves (2023) extend along the circumference of the positioning ring (202). The demolding grooves (2023) are arc-shaped structures, and the central angle β corresponding to the arc length of each demolding groove (2023) along the circumference of the positioning ring (202) is not less than 10°.

2. The mounting device of claim 1, wherein, The operating component (201) includes a plurality of connecting rods (2011) arranged at intervals along the circumference of the positioning ring (202), and each of the plurality of connecting rods (2011) is connected to the positioning ring (202).

3. A method of installing a seal assembly, characterized by, The sealing assembly includes at least one lip seal ring, and the installation method includes: The lip seal is installed in the mounting groove on the positioning ring of the mounting device, wherein the mounting device is the mounting device as described in claim 1; Using the operating mechanism of the installation device, the positioning ring containing the lip seal is placed in the gap between the fixed base and the rotating shaft tube; Control the operating element to disengage the lip seal from the positioning ring; The step of installing the lip seal ring in the mounting groove on the positioning ring of the mounting device includes: The lip of the lip seal ring is expanded outward along its own radial direction so that the lip fits against the groove wall of the mounting groove. The groove wall of the mounting groove includes a first conical surface and a second conical surface. The second conical surface is located on the side of the first conical surface away from the operating member. From the operating member to the positioning ring, the outer diameter of the second conical surface gradually increases, and the outer diameter of the first conical surface gradually decreases. The maximum outer diameter of both the first conical surface and the second conical surface is greater than the inner diameter corresponding to the lip of the lip seal ring. Controlling the operating element to disengage the lip seal from the positioning ring includes: Rotate the operating component so that the positioning ring can rotate relative to the fixed base and the rotary shaft tube through the demolding groove in its outer periphery. There are multiple demolding grooves, which are arranged at intervals along the outer periphery of the positioning ring and extend along the circumference of the positioning ring. Pull up the operating component to separate the positioning ring from the lip seal.

4. The mounting method according to claim 3, wherein Before placing the positioning ring with the lip seal in the gap between the fixed base and the rotating shaft tube via the operating component of the installation device, the installation method further includes: The fixed base and the rotating shaft tube are assembled such that the rotating shaft tube is coaxial with the fixed base, and the width of the gap is the same in the circumference of the rotating shaft tube.

5. The method of installing of claim 3, wherein, The sealing assembly also includes an intermediate spacer ring. Before or after the installation of each lip seal, the installation method further includes: The intermediate spacer ring is installed in the gap between the fixed base and the rotary shaft tube.

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