Sealing ring testing device and method for single-point liquid slip ring

Abstract

The invention provides a sealing ring testing device and method for a single-point liquid slip ring, and relates to the field of sealing performance detection.In the device, a tool bottom plate is fixed to a rack, a tool upper cover is fixedly connected with the tool bottom plate, and a rotation driving device is in driving connection with a rotating shaft and used for driving the rotating shaft to rotate on the inner side of the tool upper cover and the inner side of the tool bottom plate; the tool bottom plate is provided with a pressing hole channel and an oil collection overflow hole channel, the pressing hole channel is used for achieving medium filling and pressurization, the sealing ring is fixed between the rotating shaft and the tool bottom plate in an extruded mode and located between the pressing hole channel and the oil collection overflow hole channel and isolates the pressing hole channel and the oil collection overflow hole channel, and the oil collection overflow hole channel penetrates to the outer wall of the tool bottom plate. The method is used for detecting medium leakage. The sealing ring is installed between the rotating shaft and the tool bottom plate, the relative motion relation and the sealing interface structure of the moving ring and the static ring in the liquid slip ring are simulated, compared with a single-point liquid slip ring, the whole device is small in size and light in weight, and the testing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of sealing performance testing technology, and in particular to a single-point liquid slip ring sealing ring testing device and testing method. Background Technology

[0002] A single-point mooring system is a marine mooring and fluid transfer device that allows a vessel (such as an oil tanker) to rotate freely 360 degrees around a mooring point fixed to the seabed. Its core functions are to solve two major problems: allowing the ship to safely drift with the wind, waves, and currents, while maintaining a continuous and uninterrupted flow of fluids (crude oil, natural gas, water, etc.) between the subsea pipeline and the ship's production facilities. The single-point liquid slip ring, as a key fluid transfer device in the single-point mooring system, has an outer ring (whose outlet connects to the oil tanker) that can rotate around an inner ring (whose inlet connects to the subsea pipeline). This allows for the transfer of media between the subsea pipeline and the ship while the oil tanker floats and rotates around the mooring point.

[0003] See Figure 1 As shown, Figure 1 This is a structural diagram of a single-point liquid slip ring in the prior art. The single-point liquid slip ring includes a base 400, an outer ring 300, and an inner ring 200. The inner ring 200 is fixed to the base 400. The outer ring 300 and the inner ring 200 are rotatably connected via a bearing 500. Multiple sealing rings 600 are provided between the outer ring 300 and the inner ring 200. As the core component of the single-point liquid slip ring, the sealing ring directly affects the normal operation of the slip ring. Once the seal fails, the production system will be forced to stop. Therefore, designing reliable sealing rings and conducting effective verification is crucial.

[0004] The applicant has discovered at least the following technical problems with the existing technology: In the existing technology, single-point liquid slip ring seal failure requires testing multiple components, including the sealing ring 600, and it is necessary to check whether the sealing ring 600 in the single-point liquid slip ring has a problem. Because the liquid slip ring is large in size (ranging from 600 to 2000 mm) and heavy in weight (over 0.5 t), directly using the liquid slip ring for seal verification testing is complicated to modify the device, and the disassembly and assembly process is labor-intensive and cumbersome, resulting in high overall costs. Summary of the Invention

[0005] The purpose of this invention is to provide a single-point liquid slip ring sealing ring testing device and method, to solve the technical problems of complex device modification, large workload in disassembly and assembly, and cumbersome operation when directly using liquid slip rings for sealing ring verification tests in the prior art. The various technical effects of the preferred technical solutions provided by this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The single-point liquid slip ring sealing ring testing device provided by the present invention includes a frame, a rotary drive device, a tooling cover, a tooling base plate, and a rotating shaft, wherein: The tooling base plate is fixed to the machine frame, the tooling top cover is fixedly connected to the tooling base plate, and the rotary drive device is driven to drive the rotating shaft to rotate inside the tooling top cover and the tooling base plate. The tooling base plate is provided with a pressure testing channel and an oil overflow channel. The pressure testing channel is used to fill and pressurize the medium. The sealing ring is squeezed and fixed between the rotating shaft and the tooling base plate, and the sealing ring is located between the pressure testing channel and the oil overflow channel, thus isolating the two. The oil overflow channel extends to the outer wall of the tooling base plate and is used to detect whether there is a medium leak.

[0007] Preferably, the oil overflow channel includes an annular oil collection groove and a leak detection channel. The annular oil collection groove is located on the side of the sealing ring away from the outlet end of the pressure testing channel. The leak detection channel is connected to the oil collection groove and extends to the outer wall of the tooling base plate.

[0008] Preferably, the sealing ring includes a first sealing ring and a second sealing ring, wherein: A pressure chamber is formed between the first sealing ring and the second sealing ring, and the outlet end of the pressure channel is connected to the pressure chamber.

[0009] Preferably, the oil overflow channel includes a first annular oil collecting groove and a second annular oil collecting groove, the first annular oil collecting groove being distributed on the side of the first sealing ring away from the pressure chamber, and the second annular oil collecting groove being distributed on the side of the second sealing ring away from the pressure chamber. The oil overflow channel includes a first leak detection channel and a second leak detection channel. The first leak detection channel is connected to the first annular oil collection groove, and the second leak detection channel is connected to the second annular oil collection groove.

[0010] Preferably, the bottom of the rotating shaft is provided with a first upper sealing surface, an upper partition groove and a second upper sealing surface, and the upper partition groove is located between the first upper sealing surface and the second upper sealing surface; The tooling base plate is provided with a first lower sealing surface, a lower partition groove and a second lower sealing surface, and the lower partition groove is located between the first lower sealing surface and the second lower sealing surface. The first sealing ring is clamped and fixed between the first upper sealing surface and the first lower sealing surface, and the second sealing ring is clamped and fixed between the second upper sealing surface and the second lower sealing surface. The pressure chamber is formed by splicing the upper partition groove and the lower partition groove.

[0011] Preferably, the rotating shaft and the tooling cover are rotatably connected by a first universal ball bearing; a first clearance and a second clearance are formed between the rotating shaft and the tooling cover, the first clearance and the second clearance are located on opposite sides of the first universal ball bearing, accommodating the radial swing of the rotating shaft.

[0012] Preferably, the rotating shaft and the tooling base plate are rotatably connected by a second universal ball bearing, and a third clearance is formed between the rotating shaft and the tooling base plate. The third clearance is located on the side of the second universal ball bearing away from the pressure chamber and accommodates the radial swing of the rotating shaft.

[0013] Preferably, the rotating shaft includes a ring disk and a shaft body, wherein: The ring disk is fixed to the periphery of the shaft body, and a locking hole is provided at the end of the shaft body. The first universal ball bearings are evenly arranged on the ring disk. The first sealing ring and the second sealing ring are fixed between the annular disc and the tooling base plate, and the pressure chamber is formed between the annular disc and the tooling base plate.

[0014] Preferably, the rotary drive device includes a motor, a reducer, and a coupling. The motor and the reducer are fixed on the frame. The motor and the reducer are drivenly connected. The output end of the reducer is connected to the rotating shaft through the coupling.

[0015] The present invention also provides a method for testing a single-point liquid slip ring seal, using the above-mentioned single-point liquid slip ring seal testing device, the testing method comprising: Remove the sealing ring from the single-point liquid slip ring, install and fix the sealing ring between the rotating shaft and the tool base plate, and position the sealing ring between the pressure channel and the oil collection overflow channel; Fill the pressurization channel with pressurizing medium; Start the rotary drive device to make the shaft rotate; Check if there is any medium flowing out of the oil overflow channel. If so, the sealing ring is leaking.

[0016] The single-point liquid slip ring sealing ring testing device and method provided by this invention have the following advantages compared with the prior art: A rotary drive device is connected to a rotating shaft, which rotates inside the tooling cover and the tooling base plate. The tooling base plate and the rotating shaft respectively simulate the inner and outer rings in a single-point liquid slip ring. By installing the sealing ring between the rotating shaft and the tooling base plate, the relative motion relationship and sealing interface structure of the moving and stationary rings in the liquid slip ring are simulated. The pressure channel and the oil overflow channel are located on opposite sides of the sealing ring, forming a clear pressure gradient and leakage path, allowing for sealing performance testing. If the medium flows out from the oil overflow channel, it proves that the sealing ring has a sealing performance defect. Compared with single-point liquid slip rings, the entire device is smaller and lighter, can complete sealing ring testing, improves testing efficiency, and significantly reduces verification costs and cycle time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural diagram of a single-point liquid slip ring in the prior art; Figure 2 This is a schematic diagram of the overall structure of a single-point liquid slip ring sealing ring testing device; Figure 3 This is an axial cross-sectional view of the testing fixture; Figure 4 This is a partial cross-sectional view of one side of the testing fixture; Figure 5 This is a partial cross-sectional view of the other side of the test fixture; Figure 6 This is a three-dimensional structural diagram of the rotating shaft; Figure 7 It is a cross-sectional view of the shaft; Figure 8 This is a three-dimensional structural diagram of the tooling base plate; Figure 9 This is a cross-sectional view of the tooling base plate.

[0019] In the diagram: 100, test fixture; 200, inner ring; 300, outer ring; 400, base; 500, bearing; 1, frame; 21, motor; 22, reducer; 23, coupling; 3, fixture top cover; 4, fixture base plate; 41, first lower sealing surface; 42, second lower sealing surface; 43, lower partition groove; 44, threaded hole; 5, rotating shaft; 501, ring disc; 502, shaft body; 503, locking hole; 51, first upper sealing surface; 52 53. Second upper sealing surface; 6. Upper partition groove; 71. Pressure testing channel; 72. First annular oil collecting groove; 73. Second annular oil collecting groove; 74. First leak detection channel; 85. Second leak detection channel; 86. First clearance; 87. Second clearance; 88. Third clearance; 9. Pressure chamber; 10. First universal ball bearing; 11. Second universal ball bearing; 12. First bearing housing; 13. Second bearing housing; 20. First sealing ring; 30. Second sealing ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] In the description of this invention, it should be understood that the terms "center," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "side," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0022] See Figure 1 As shown, Figure 1This is a structural diagram of a single-point liquid slip ring in the prior art. The single-point liquid slip ring includes a base 400, an outer ring 300, and an inner ring 200. The inner ring 200 is fixed to the base 400. The outer ring 300 and the inner ring 200 are rotatably connected via a bearing 500. A sealing ring 600 is provided between the outer ring 300 and the inner ring 200. The sealing ring 600, as a core component of the single-point liquid slip ring, directly affects the normal operation of the slip ring. Once the seal fails, the production system will be forced to shut down. Therefore, designing a reliable sealing ring and conducting effective verification is crucial. In the prior art, single-point liquid slip ring seal failure requires testing multiple components, including the sealing ring, to check for problems with the sealing ring in the single-point liquid slip ring. Due to the large size (600-2000mm) and heavy weight (over 0.5t) of liquid slip rings, directly using liquid slip rings for sealing ring verification tests involves complex equipment modification, a large workload in disassembly and assembly, and cumbersome operation, resulting in high overall costs.

[0023] To address the aforementioned issues, this invention provides a sealing ring testing device for single-point liquid slip rings. Compared to single-point liquid slip rings, the entire device is smaller in size and lighter in weight, capable of performing sealing ring tests, thus improving testing efficiency and significantly reducing verification costs and time.

[0024] The following is combined with Figures 2-9 The technical solution provided by this invention will be described in more detail below.

[0025] Example 1: See Figures 2-9 As shown, the single-point liquid slip ring sealing ring testing device provided by the present invention includes a frame 1, a rotary drive device, and a testing fixture 100. The testing fixture 100 includes a fixture cover 3, a fixture base plate 4, and a rotating shaft 5. The fixture base plate 4 is fixed to the frame 1, the fixture cover 3 is fixedly connected to the fixture base plate 4, and the rotary drive device is driven to rotate the rotating shaft 5 within the fixture cover 3 and the fixture base plate 4. The fixture base plate 4 is provided with a pressure-pressurizing channel 6 and an oil overflow channel. The pressure-pressurizing channel 6 is used to fill and pressurize the medium. The sealing ring is pressed and fixed between the rotating shaft 5 and the fixture base plate 4, and the sealing ring is located between the pressure-pressurizing channel 6 and the oil overflow channel, isolating them. The oil overflow channel extends to the outer wall of the fixture base plate 4 to detect whether there is a medium leak. The sealing ring can be any of the single-point liquid slip rings to be tested.

[0026] See Figure 2 The tooling cover 3 and the tooling base plate 4 are connected by studs. For details, please refer to [link / reference]. Figure 8 The tooling base plate 4 is provided with threaded holes 44 for bolts to pass through and fix it to the frame 1.

[0027] In this embodiment, the rotating shaft 5 is used to simulate the outer ring in an actual single-point liquid slip ring, and its outer surface is machined with a sealing mating surface consistent with the actual working conditions. The tooling base plate 4 is fixed on the frame 1, simulating the stationary inner ring in a single-point liquid slip ring. The pressure testing channel 6 is used to introduce test media such as hydraulic oil and water, and apply a working pressure of 0-5 MPa to simulate the actual delivery pressure. The oil overflow channel is located on the back pressure side of the sealing ring. Once the seal fails, the leaking medium will flow into this channel and out from the leak detection port on the outer wall, which is convenient for intuitive judgment.

[0028] In this embodiment, the rotary drive device is connected to the rotating shaft 5, driving the rotating shaft 5 to rotate inside the tooling cover 3 and the tooling base plate 4. By installing the sealing ring between the rotating shaft 5 and the tooling base plate 4, the relative motion relationship and sealing interface structure of the rotating and stationary rings in the liquid slip ring are simulated. The pressure channel 6 and the oil overflow channel are located on opposite sides of the sealing ring, forming a clear pressure gradient and leakage path, allowing the sealing performance to be tested. If the medium flows out from the oil overflow channel, it proves that the sealing ring has a sealing performance defect. Compared with a single-point liquid slip ring, the entire device is small in size and light in weight, can complete the sealing ring test, improves the testing efficiency, and significantly reduces the verification cost and cycle.

[0029] As an alternative implementation, see [link to implementation details]. Figure 2 As shown, the rotary drive device in this embodiment includes a motor 21, a reducer 22 and a coupling 23. The motor 21 and the reducer 22 are fixed on the frame 1. The motor 21 and the reducer 22 are drivenly connected. The output end of the reducer 22 is connected to the rotating shaft 5 through the coupling 23.

[0030] Motor 21 provides driving force as the power source, the reducer adjusts the input speed to the required parameters, coupling 23 connects the reducer output shaft to the test fixture, and frame 1 is used to fix the reducer and test fixture to ensure stable system operation. Among these, motor 21, reducer, and frame 1 are general-purpose modules, while coupling 23 and test fixture are customized modules. This modular design allows for compatible testing of sealing rings of different specifications and pressure ratings, further enhancing the versatility and adaptability of the testing system, thus effectively supporting the testing of liquid slip ring seals.

[0031] In this embodiment, the rotary drive device with the above structure is connected to the rotating shaft 5 to simulate the actual working conditions of a single-point liquid slip ring, ensuring that the working conditions of the sealing ring during the test are more in line with the actual situation and improving the accuracy of the test. As an alternative implementation, see [link to implementation details]. Figure 3 , Figure 4 and Figure 5As shown, the oil overflow channel in this embodiment includes an annular oil collection groove and a leak detection channel. The annular oil collection groove is located on the side of the corresponding sealing ring away from the outlet end of the pressure testing channel 6. The leak detection channel is connected to the oil collection groove and extends to the outer wall of the tooling base plate 4.

[0032] The annular oil collection groove is a groove opened along the circumference on the tooling base plate 4, surrounding the sealing ring, and is used to collect the medium that may leak. The structure of the annular oil collection groove can collect the leaked medium from the circumference of the sealing ring, avoid the local accumulation of the leaked medium, and prevent the leaked medium from failing to flow to the leak detection channel and causing misjudgment.

[0033] The leak detection channel is a channel that leads from the annular oil collection tank to the outer wall of the tooling base plate 4. It can be connected to a transparent observation tube, flow meter or liquid level sensor for direct observation of whether there is a medium leak.

[0034] In this embodiment, the annular oil collection groove ensures that leaks in the entire 360° circumference can be captured, avoiding missed detection due to the offset of the leak point location; the leak detection channel provides a clear leak outlet, which can support rapid judgment by manual visual inspection, and can also be connected to a flow meter to achieve quantitative analysis, greatly improving the detection sensitivity and reliability.

[0035] As an alternative implementation, see [link to implementation details]. Figures 3-5 As shown, the sealing ring in this embodiment includes a first sealing ring 20 and a second sealing ring 30, wherein: a pressure chamber 9 is formed between the first sealing ring 20 and the second sealing ring 30, and the outlet end of the pressure channel 6 is connected to the pressure chamber 9.

[0036] The pressure chamber 9 formed between the first sealing ring 20 and the second sealing ring 30 can be injected with test medium to simulate the working condition of real working pressure acting on the sealing lip.

[0037] In this embodiment, by applying pressure between the first sealing ring 20 and the second sealing ring 30, the sealing performance of the two sealing rings can be verified simultaneously, which improves the efficiency of design verification and reduces the pressure-bearing area of ​​the device to achieve lightweight design.

[0038] As an alternative implementation, see [link to implementation details]. Figures 3-9 As shown, the oil overflow channel in this embodiment includes a first annular oil collecting groove 71 and a second annular oil collecting groove 72. The first annular oil collecting groove 71 is distributed on the side of the first sealing ring 20 away from the pressure chamber 9, and the second annular oil collecting groove 72 is distributed on the side of the second sealing ring 30 away from the pressure chamber 9. The oil overflow channel includes a first leak detection channel 73 and a second leak detection channel 74. The first leak detection channel 73 is connected to the first annular oil collecting groove 71, and the second leak detection channel 74 is connected to the second annular oil collecting groove 72.

[0039] In this embodiment, the oil overflow channel adopts a structure of double-annular oil collection groove + double leak detection channel. By setting the first annular oil collection groove 71 on the side of the first sealing ring 20 away from the pressure chamber 9 and setting the second annular oil collection groove 72 on the side of the second sealing ring 30 away from the pressure chamber 9, independent and zoned monitoring of the first sealing ring 20 and the second sealing ring 30 is achieved. Specifically, when the test medium is pressurized to the pressure chamber 9, if the first sealing ring 20 fails, the leaking medium will flow into the first annular oil collection groove 71 and flow out through the first leak detection channel 73; if the second sealing ring 30 fails, the leaking medium will flow into the second annular oil collection groove 72 and flow out through the second leak detection channel 74. Among them, the first sealing ring 20 and the second sealing ring 30 are two sealing rings 600 to be tested in a single-point liquid slip ring.

[0040] The structure described in this embodiment, on the one hand, allows for simultaneous testing of any two sealing rings 600 within a single point liquid slip ring in a single test, improving testing efficiency. On the other hand, see... Figure 4 and Figure 5 As shown, a first sealing ring 20 and a second sealing ring 30 are simultaneously installed in the space between the rotating shaft 5 and the tooling base plate 4. Compared with the technical solution of installing only one sealing ring, when the medium flows into the pressure chamber 9, the pressure-bearing area of ​​the test tooling can be significantly reduced, which is conducive to reducing the overall volume of the test device, thereby achieving lightweight design, reducing manufacturing costs, and improving test efficiency.

[0041] As an alternative implementation, see [link to implementation details]. Figures 3-7 As shown, the bottom of the rotating shaft 5 is provided with a first upper sealing surface 51, an upper partition groove 53, and a second upper sealing surface 52, with the upper partition groove 53 located between the first upper sealing surface 51 and the second upper sealing surface 52; the tooling base plate 4 is provided with a first lower sealing surface 41, a lower partition groove 43, and a second lower sealing surface 42, with the lower partition groove 43 located between the first lower sealing surface 41 and the second lower sealing surface 42; the first sealing ring 20 is clamped and fixed between the first upper sealing surface 51 and the first lower sealing surface 41, and the second sealing ring 30 is clamped and fixed between the second upper sealing surface 52 and the second lower sealing surface 42; the pressure chamber 9 is formed by splicing the upper partition groove 53 and the lower partition groove 43.

[0042] The first upper sealing surface 51 and the first lower sealing surface 41 cooperate to clamp the first sealing ring 20, the second upper sealing surface 52 and the second lower sealing surface 42 cooperate to clamp the second sealing ring 30. The first upper sealing surface 51, the first lower sealing surface 41, the second upper sealing surface 52 and the second lower sealing surface 42 have a certain degree of roughness to facilitate the sealing between the corresponding sealing surfaces and the corresponding sealing rings. The upper partition groove 53 and the lower partition groove 43 form an annular cavity after docking, which is the aforementioned pressure chamber 9.

[0043] In this embodiment, the matching and machining of the rotating shaft 5 and the tooling base plate 4 ensures accurate installation of the first sealing ring 20 and the second sealing ring 30, and uniform preload. The pressure chamber 9 formed by the splicing of the partition grooves has clear boundaries, facilitating the machining of the sealing surfaces on both sides of the pressure chamber 9 (the first upper sealing surface 51 and the first lower sealing surface 41, the second upper sealing surface 52 and the second lower sealing surface 42), reducing the machining cost of the sealing surfaces. Furthermore, the pressure chamber 9 separates the corresponding sealing surfaces on the left and right sides, facilitating the key protection of the sealing surfaces at each stage. This structure also facilitates the replacement of sealing rings with different cross-sectional sizes; only the corresponding tooling module needs to be replaced.

[0044] As an alternative implementation, see [link to implementation details]. Figure 6 and Figure 7 As shown, the rotating shaft 5 includes an annular disc 501 and a shaft body 502. The annular disc 501 and the shaft body 502 can be integrally formed. The annular disc 501 is fixed to the periphery of the shaft body 502. The end of the shaft body 502 is provided with a locking hole 503, which is used for bolts and other locking components to pass through, thereby realizing the fixed connection between the rotating shaft 5 and the coupling 23. The first universal ball bearing 10 is evenly arranged on the annular disc 501. The first sealing ring 20 and the second sealing ring 30 are fixed between the annular disc 501 and the tooling base plate 4. The pressure chamber 9 is formed between the annular disc 501 and the tooling base plate 4.

[0045] For details, see Figure 3 , Figure 6 and Figure 7 As shown, a first bearing seat 12 is provided on the ring disk 501 of the rotating shaft 5, and a first universal ball bearing 10 is located inside the first bearing seat 12 to realize the smooth rotational movement between the rotating shaft 5 and the tooling cover 3.

[0046] See Figures 3-5 , Figure 8 and Figure 9 As shown, a second bearing seat 13 is provided on the tooling base plate 4, and a second universal ball bearing 11 is provided inside the second bearing seat 13 to realize the smooth rotational movement between the rotating shaft 5 and the tooling base plate 4.

[0047] See Figure 6 and Figure 7As shown, the first universal ball bearing 10 is evenly arranged on the ring disk 501, so that the support point is closer to the sealing area, which effectively simulates the stress state of the outer ring in a real liquid sliding ring, while ensuring uniform load transmission and preventing the sealing ring from failing prematurely due to local overpressure. The first sealing ring 20 and the second sealing ring 30 are directly fixed between the ring disk 501 and the tooling base plate 4, and the pressure chamber 9 is also formed on the mating surface of the two. This layout accurately reproduces the geometric relationship and pressure action mode of the sealing interface in the actual liquid sliding ring, so that the compression of the sealing lip, the medium pressure distribution and the leakage path during the test are highly consistent with the real working conditions, thereby significantly improving the engineering applicability of the test results.

[0048] In this embodiment, the first sealing ring 20 and the second sealing ring 30 provide axial sealing, and the coaxiality requirement for the sealing pairs on both sides is relatively low. Therefore, a clearance is provided between the rotating shaft 5 and the tooling cover 3 and the tooling base plate 4.

[0049] For details, see Figures 3-5 As shown, the rotating shaft 5 and the tooling cover 3 are rotatably connected by a first universal ball bearing 10; a first clearance 81 and a second clearance 82 are formed between the rotating shaft 5 and the tooling cover 3. The first clearance 81 and the second clearance 82 are located on opposite sides of the first universal ball bearing 10. The first clearance 81 and the second clearance 82 are the circumferential rotational pair clearances of the rotating shaft 5 and the tooling cover 3 to allow the radial swing of the rotating shaft 5.

[0050] The rotating shaft 5 and the tooling base plate 4 are rotatably connected by the second universal ball bearing 11. A third clearance 83 is formed between the rotating shaft 5 and the tooling base plate 4. The third clearance 83 is located on the side of the second universal ball bearing 11 away from the pressure chamber 9. The third clearance 83 and the second clearance 82 are the circumferential rotational pair clearances between the rotating shaft 5 and the tooling cover 3, so as to allow the radial swing of the rotating shaft 5.

[0051] In this embodiment, because the coaxiality requirement of the sealing pairs on both sides is low, the above-mentioned first clearance 81, second clearance 82 and third clearance 83 are provided between the rotating shaft and the tooling cover and tooling base plate. This not only ensures the normal realization of the rotation function, but also significantly reduces the precision requirements of the parts in the processing and assembly process, making processing easier and reducing processing costs.

[0052] The narrow pressure chamber 9 formed between the first sealing ring 20 and the second sealing ring 30 significantly reduces the pressure-bearing area of ​​the test fixture. Combined with the extremely low rotational speed of the liquid slip ring (approximately 0.1 r / min), this makes the application of the first universal ball bearing 10 and the second universal ball bearing 11 feasible. The placement of the first universal ball bearing 10 and the second universal ball bearing 11 further reduces the requirements for the coaxiality of the test device, ensuring the normal realization of the rotation function while significantly reducing the precision requirements of the components during processing and assembly, thereby effectively reducing processing costs and simplifying the assembly process.

[0053] See Figures 2-5 As shown, when the first sealing ring 20 fails, the medium leaks into the first annular oil collection groove 71. As the leakage accumulates, the medium gradually flows into the first leak detection hole, thus achieving the leak detection function. Similarly, when the second sealing ring 30 fails, the medium leaks into the second annular oil collection groove 72. As the leakage accumulates, the medium gradually flows into the second leak detection hole, thus achieving the leak detection function. The first sealing ring 20 and the second sealing ring 30 serve as both the test object and the tooling structure. Their dimensions should be as close as possible to significantly reduce the pressure-bearing area of ​​the test tooling, thereby achieving weight reduction and lower manufacturing costs. A single test can simultaneously test both sealing rings, significantly improving testing efficiency.

[0054] This device significantly reduces the weight of the sealing ring testing equipment for liquid slip rings during manufacturing. Taking the 600mm sealing ring testing fixture as an example, its weight is only about 20% of that of a liquid slip ring. Considering all the above factors, the overall cost is expected to be reduced by 60% to 80%.

[0055] Example 2: This embodiment provides a method for testing the sealing ring of a single-point liquid slip ring, using the single-point liquid slip ring testing device of Embodiment 1 above. The testing method includes: removing the sealing ring from the single-point liquid slip ring; installing and fixing the sealing ring between the rotating shaft 5 and the tooling base plate 4, with the sealing ring positioned between the pressure channel 6 and the oil overflow channel; filling the pressure channel 6 with pressurizing medium; starting the rotation drive device to rotate the rotating shaft 5; and detecting whether there is medium flowing out at the oil overflow channel. If so, the sealing ring is leaking.

[0056] This embodiment provides a method for testing the sealing ring of a single-point liquid slip ring, which has the following advantages: it facilitates the installation of the sealing ring to be tested onto the testing device and enables rapid positioning; the medium pressurization and the rotational power of the rotary drive device are applied synchronously to reproduce the real working conditions; and the oil overflow channel allows for intuitive leak detection to determine the sealing effectiveness. Overall, it reduces the overall cost and improves the efficiency of testing and verification.

[0057] The specific features, structures, or characteristics described in this specification may be combined in any suitable manner in one or more embodiments or examples.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sealing ring testing device for a single-point liquid slip ring, characterized in that, Includes a frame, a rotary drive unit, a tooling cover, a tooling base plate, and a rotating shaft, wherein: The tooling base plate is fixed to the machine frame, the tooling top cover is fixedly connected to the tooling base plate, and the rotary drive device is driven to drive the rotating shaft to rotate inside the tooling top cover and the tooling base plate. The tooling base plate is provided with a pressure testing channel and an oil overflow channel. The pressure testing channel is used to fill and pressurize the medium. The sealing ring is squeezed and fixed between the rotating shaft and the tooling base plate, and the sealing ring is located between the pressure testing channel and the oil overflow channel, thus isolating the two. The oil overflow channel extends to the outer wall of the tooling base plate and is used to detect whether there is a medium leak.

2. The single-point liquid slip ring sealing ring testing device according to claim 1, characterized in that, The oil overflow channel includes an annular oil collection groove and a leak detection channel. The annular oil collection groove is located on the side of the sealing ring away from the outlet end of the pressure testing channel. The leak detection channel is connected to the oil collection groove and extends to the outer wall of the tooling base plate.

3. The single-point liquid slip ring sealing ring testing device according to claim 1, characterized in that, The sealing ring includes a first sealing ring and a second sealing ring, wherein: A pressure chamber is formed between the first sealing ring and the second sealing ring, and the outlet end of the pressure channel is connected to the pressure chamber.

4. The single-point liquid slip ring sealing ring testing device according to claim 3, characterized in that, The oil overflow channel includes a first annular oil collecting groove and a second annular oil collecting groove. The first annular oil collecting groove is distributed on the side of the first sealing ring away from the pressure chamber, and the second annular oil collecting groove is distributed on the side of the second sealing ring away from the pressure chamber. The oil overflow channel includes a first leak detection channel and a second leak detection channel. The first leak detection channel is connected to the first annular oil collection groove, and the second leak detection channel is connected to the second annular oil collection groove.

5. The single-point liquid slip ring sealing ring testing device according to claim 3, characterized in that, The bottom of the rotating shaft is provided with a first upper sealing surface, an upper partition groove and a second upper sealing surface, and the upper partition groove is located between the first upper sealing surface and the second upper sealing surface; The tooling base plate is provided with a first lower sealing surface, a lower partition groove and a second lower sealing surface, and the lower partition groove is located between the first lower sealing surface and the second lower sealing surface. The first sealing ring is clamped and fixed between the first upper sealing surface and the first lower sealing surface, and the second sealing ring is clamped and fixed between the second upper sealing surface and the second lower sealing surface. The pressure chamber is formed by splicing the upper partition groove and the lower partition groove.

6. The single-point liquid slip ring sealing ring testing device according to claim 3, characterized in that, The rotating shaft and the tooling cover are rotatably connected by a first universal ball bearing; a first clearance and a second clearance are formed between the rotating shaft and the tooling cover, and the first clearance and the second clearance are located on opposite sides of the first universal ball bearing to accommodate the radial swing of the rotating shaft.

7. The single-point liquid slip ring sealing ring testing device according to claim 3, characterized in that, The rotating shaft is rotatably connected to the tooling base plate via a second universal ball bearing. A third clearance is formed between the rotating shaft and the tooling base plate. The third clearance is located on the side of the second universal ball bearing away from the pressure chamber to accommodate the radial swing of the rotating shaft.

8. The single-point liquid slip ring sealing ring testing device according to claim 6, characterized in that, The rotating shaft includes a ring disk and a shaft body, wherein: The ring disk is fixed to the periphery of the shaft body, and a locking hole is provided at the end of the shaft body. The first universal ball bearings are evenly arranged on the ring disk. The first sealing ring and the second sealing ring are fixed between the annular disc and the tooling base plate, and the pressure chamber is formed between the annular disc and the tooling base plate.

9. The single-point liquid slip ring sealing ring testing device according to claim 1, characterized in that, The rotary drive device includes a motor, a reducer, and a coupling. The motor and the reducer are fixed on the frame. The motor and the reducer are drivenly connected. The output end of the reducer is connected to the rotating shaft through the coupling.

10. A method for testing the sealing ring of a single-point liquid slip ring, characterized in that, Using the single-point liquid slip ring sealing ring testing device according to any one of claims 1-9, the testing method includes: Remove the sealing ring from the single-point liquid slip ring, install and fix the sealing ring between the rotating shaft and the tool base plate, and position the sealing ring between the pressure channel and the oil collection overflow channel; Fill the pressurization channel with pressurizing medium; Start the rotary drive device to make the shaft rotate; Check if there is any medium flowing out of the oil overflow channel. If so, the sealing ring is leaking.

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