Sealing device for hydrogen transport supercharging device
By using a sealing structure that combines a floating ring and a fixed ring, along with an elastic ring and a telescopic ring, the problem of reduced sealing performance under high pressure and temperature changes in traditional sealing structures is solved, achieving a stable sealing effect within the pressurization device.
Patent Information
- Application Number
- CN202423140408.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Traditional sealing structures are susceptible to high pressure and temperature changes within pressurization devices, leading to decreased sealing performance and potential hydrogen leakage hazards.
The sealing structure employs a combination of floating rings and fixed rings. The inner surface of the floating ring is in clearance fit with the rotating shaft, and the end face of the floating ring is in clearance fit with the fixed ring. Dynamic sealing is achieved through the cooperation of elastic rings and telescopic rings, adapting to high pressure and temperature changes.
It effectively reduces hydrogen leakage, maintains sealing performance, ensures stable sealing under high pressure and temperature changes, and achieves stable sealing of the rotating shaft.
Smart Images
Figure CN223578855U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of sealing of pressure increasing device, specifically relates to a sealing device for hydrogen conveying pressure increasing device. BACKGROUND
[0002] With the transformation of global energy structure, hydrogen energy as an important part of clean energy, its storage and transportation technology is increasingly concerned. Pipeline transportation is one of the effective ways of long-distance hydrogen transportation, but in the process of pressure increasing, how to ensure the sealing reliability of the pressure increasing device becomes a key challenge. The sealing performance of the traditional sealing mechanism, i.e. metal sealing ring, rubber sealing ring, etc., is prone to decline in the pressure increasing device due to the influence of high pressure and temperature change, which exists the safety hidden danger of hydrogen leakage. SUMMARY
[0003] The technical problem to be solved by the utility model is to provide a sealing device for hydrogen conveying pressure increasing device, which solves the technical problem that the traditional sealing structure is prone to sealing performance decline due to the influence of high pressure and temperature change in the pressure increasing device.
[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0005] A sealing device for hydrogen conveying pressure increasing device, comprising a rotating shaft located in the pressure increasing device, a fixed ring provided on the shell of the pressure increasing device, a floating ring embedded in the fixed ring and penetrating the rotating shaft, and a sealing auxiliary mechanism provided on the floating ring and located between the floating ring and the fixed ring; the inner surface of the floating ring is gap-fitted with the rotating shaft, and the end face of the floating ring is gap-fitted with the fixed ring.
[0006] Further, the fixed ring is provided with an embedding groove, the floating ring is embedded in the embedding groove, two elastic rings are arranged in the embedding groove, the elastic rings are attached to the outer surface of the floating ring, and the two elastic rings are located on the two sides of the sealing auxiliary mechanism.
[0007] Further, the sealing auxiliary mechanism comprises two telescopic rings sleeved on the outer surface of the floating ring, and a telescopic mechanism arranged on the floating ring and used for making the telescopic rings expand and contract along the radial direction of the floating ring; the outer surface of the telescopic ring is attached to the inner wall of the embedding groove.
[0008] Further, two annular grooves are circumferentially arranged on the outer surface of the floating ring, the two telescopic rings are embedded in the two annular grooves respectively, and a first gap is left between the end face of the telescopic ring and the inner wall of the annular groove; the telescopic mechanism is arranged in the annular groove and connected with the inner surface of the telescopic ring.
[0009] Further, the telescopic mechanism comprises a plurality of springs uniformly arranged in the annular groove; the two ends of the spring are connected between the inner wall of the annular groove and the inner surface of the telescopic ring respectively.
[0010] Further, a second gap is left between the outer surface of the floating ring and the inner wall of the embedded groove.
[0011] Further, two annular pressure grooves are formed between the fixed ring and the outer surface of the floating ring, a plurality of air guide holes are distributed in the circumferential direction of the floating ring, and two air holes are formed in the floating ring and connected to the air guide holes and the two annular pressure grooves respectively; the air outlet end of the air hole is close to the end face of the floating ring, and the air inlet end of the air guide hole is communicated with hydrogen in the supercharging device.
[0012] Further, a gas delivery hole is formed in the inner surface of the floating ring and communicated with the air guide hole.
[0013] Further, a metal ring is arranged in the floating ring.
[0014] Further, the gap between the inner surface of the floating ring and the rotating shaft is 5-20μm, and the gap between the end face of the floating ring and the fixed ring is 5-20μm.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] The utility model discloses simple structure, scientific and reasonable in design, convenient to use, the utility model discloses floating ring carries out dynamic sealing to rotating shaft, is influenced by the high pressure in the supercharging device under the rotation of rotating shaft, and the floating ring is free floating between rotating shaft and fixed ring along the axial direction and the radial direction, and the sealing gap between the floating floating ring and rotating shaft, fixed ring exists, and the sealing gap is small, and hydrogen leakage is low, and the sealing effect is good, and compared with the static sealing of traditional structure, the utility model effectively transforms the high pressure in the supercharging device, can normally play a role under high pressure, and maintains the sealing performance, and the utility model discloses floating ring is automatically aligned with the axle center under the action of elastic ring and telescopic ring after floating, makes the sealing gap between the inner surface of floating ring and rotating shaft even, and the sealing gap between the end face of floating ring and the inner wall of fixed ring is even, realizes the stable sealing of rotating shaft, and the utility model discloses telescopic ring can be telescopic along the radial direction of floating ring, and the first gap is left between telescopic ring and the inner wall of annular groove, and the second gap is left between the outer surface of floating ring and the inner wall of embedded groove, so when the temperature change occurs in the supercharging device, and the thermal expansion and cold shrinkage of floating ring appear, the first gap and the second gap can provide accommodating space for the volume change of floating ring, and the telescopic ring is shortened and lengthened on the floating ring simultaneously with the thermal expansion and cold shrinkage of floating ring, always ensures that telescopic ring and the inner wall of fixed ring are attached, so that floating ring can still normally play a sealing role under the condition that the temperature changes. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the sectional view of the utility model structure.
[0018] Figure 2 It is the sectional view of the fixed ring.
[0019] Figure 3It is the appearance schematic diagram of the floating ring.
[0020] Figure 4 It is the appearance schematic diagram of the telescopic ring.
[0021] Figure 5 It is the sectional view of the telescopic ring embedded in the floating ring.
[0022] Figure 6 It is the schematic diagram of the air inlet end of the air hole distributed on the end surface of the floating ring.
[0023] Figure 7 It is the sectional view of the floating ring.
[0024] In the drawings, the names corresponding to the reference signs are:
[0025] 1-rotating shaft, 2-fixed ring, 3-floating ring, 4-embedded groove, 5-elastic ring, 6-telescopic ring, 7-annular groove, 8-first gap, 9-spring, 10-second gap, 11-air hole, 12-vent hole, 13-gas hole, 14-metal ring, 15-annular pressing groove. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the following will be further described in detail in combination with the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0027] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms 'center', 'upper', 'lower', 'left', 'right','vertical', 'horizontal', 'inner', 'outer' and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore it cannot be understood as the restriction of the utility model. In addition, the terms 'first','second', 'third' are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0028] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "connection", "connect" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, of course, also can be mechanical connection, also can be electric connection, in addition, also can be directly connected, also can be indirectly connected through the intermediate medium, or can be two element internal communication. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.
[0029] Embodiment 1
[0030] As Figures 1-7 The utility model provides a kind of sealing device for hydrogen delivery pressure device, including shaft 1 located in pressure device, still include the fixed ring 2 of being equipped with on the shell of pressure device, float ring 3 is embedded in fixed ring 2 and is worn on shaft 1, and sealing auxiliary mechanism is equipped in float ring 3 and located between float ring 3 and fixed ring 2;Float ring 3 inner surface and shaft 1 clearance fit, float ring 3 end surface and fixed ring 2 clearance fit.
[0031] The utility model float ring 3 inner surface and the clearance between shaft 1 is 5-20 μm, the clearance between float ring 3 end surface and fixed ring 2 is 5-20 μm.
[0032] The utility model simple structure, scientific and reasonable in design, convenient to use, the utility model float ring is sealed to shaft, under the influence of shaft rotation and high pressure in pressure device, float ring occurs free floating between shaft and fixed ring along axial direction and radial direction, and there is sealing gap between floating float ring and shaft, fixed ring, the sealing gap is small, hydrogen leakage is low, and sealing effect is good, relative to the static sealing of traditional structure, the utility model effectively transforms the high pressure influence in pressure device, can normally play a role under high pressure, and maintains sealing performance;After floating, float ring is automatically aligned with the axis by the action of elastic ring and telescopic ring, so that the sealing gap between the inner surface of float ring and the outer wall of shaft is uniform, and the sealing gap between the end surface of float ring and the inner wall of fixed ring is uniform, to realize the stable sealing of shaft;The telescopic ring of the utility model can be telescopic along the radial direction of float ring, and there is first gap between telescopic ring and annular groove inner wall, and the first gap is 0.8-1.5mm, and there is second gap between the outer surface of float ring and the inner wall of embedding groove, and the second gap is 0.8-1.5mm, so when temperature change occurs in pressure device, and float ring appears thermal expansion and cold shrinkage, first gap and second gap can provide accommodation space for the volume change of float ring, and telescopic ring is shortened and lengthened on float ring simultaneously with thermal expansion and cold shrinkage of float ring, always ensure that telescopic ring and fixed ring inner wall are attached, so that float ring can still normally play a sealing role under the condition that temperature changes.
[0033] Embodiment 2
[0034] As Figures 1-7 shown, the utility model provides a kind of sealing device for hydrogen delivery booster, including the rotating shaft 1 in booster, still include the fixed ring 2 of being located on the shell of booster, the floating ring 3 of being embedded in fixed ring 2 and being threaded on the rotating shaft 1, and the sealing auxiliary mechanism of being located on floating ring 3 and between floating ring 3 and fixed ring 2;Floating ring 3 inner surface and rotating shaft 1 clearance fit, floating ring 3 end surface and fixed ring 2 clearance fit.
[0035] Fixed ring 2 is circumferentially provided with embedding groove 4, floating ring 3 is embedded in embedding groove 4, and two elastic rings 5 are circumferentially provided in embedding groove 4, the outer surface of elastic ring 5 is attached to floating ring 3, and the two elastic rings 5 are located on the two sides of the sealing auxiliary mechanism, respectively.
[0036] In this embodiment 2, when floating ring 3 occurs inclination angle between rotating shaft 1 and fixed ring inner wall along axial and radial direction, floating ring 3 will extrude elastic ring 5, elastic ring 5 is extruded and deformed elastically and stores energy, and in the process of restoring deformation by releasing energy, floating ring 3 is pushed, so that the inclination angle between floating ring 3 and rotating shaft 1 and fixed ring inner wall is dynamically reduced, and floating ring 3 continues to float until the sealing gap between floating ring 3 and rotating shaft 1 and fixed ring inner wall is uniform. The function of elastic ring 5 is to make the sealing gap between the inner surface of floating ring 3 and the outer wall of rotating shaft 1 uniform, and the sealing gap between the end surface of floating ring and the inner wall of fixed ring uniform, to ensure the sealing stability of floating ring 3.
[0037] Hydrogen in the booster enters the sealing gap between the inner surface of floating ring 3 and the outer wall of rotating shaft 1 to form a fluid film, and enters the sealing gap between the end surface of floating ring and the inner wall of fixed ring to form a fluid film, and the fluid film has a bearing function, so that floating ring 3 realizes floating.
[0038] Embodiment 3
[0039] As Figures 1-7 shown, the utility model provides a kind of sealing device for hydrogen delivery booster, including the rotating shaft 1 in booster, still include the fixed ring 2 of being located on the shell of booster, the floating ring 3 of being embedded in fixed ring 2 and being threaded on the rotating shaft 1, and the sealing auxiliary mechanism of being located on floating ring 3 and between floating ring 3 and fixed ring 2;Floating ring 3 inner surface and rotating shaft 1 clearance fit, floating ring 3 end surface and fixed ring 2 clearance fit.
[0040] Fixed ring 2 is circumferentially provided with embedding groove 4, floating ring 3 is embedded in embedding groove 4, and two elastic rings 5 are circumferentially provided in embedding groove 4, the outer surface of elastic ring 5 is attached to floating ring 3, and the two elastic rings 5 are located on the two sides of the sealing auxiliary mechanism, respectively.
[0041] The sealing auxiliary mechanism includes two telescopic rings 6 circumferentially fitted on the outer surface of the floating ring 3, and a telescopic mechanism provided on the floating ring 3 for extending and retracting the telescopic rings 6 in the radial direction of the floating ring 3; the outer surface of the telescopic rings 6 is in contact with the inner wall of the mounting groove 4.
[0042] In this embodiment 3, the elastic ring 5 is elastic, and the telescopic ring 6 can extend and retract in the radial direction of the floating ring 3. The inner surface of the floating ring 3 is in clearance fit with the outer wall of the rotating shaft, so the floating ring 3 can float in the radial direction. The outer surface of the telescopic ring 6 is in contact with the inner wall of the mounting groove 4, thus ensuring the stability of the floating ring 3 when it floats in the radial direction.
[0043] When the floating ring floats in the axial and radial directions and tilts at an angle to the rotating shaft 1 and the inner wall of the fixed ring, the telescopic ring 6 assists the elastic ring 5. The tilted floating ring compresses the telescopic mechanism. At this time, the telescopic ring 6 retracts into the annular groove 7. The telescopic mechanism stores energy under pressure. During the process of releasing energy, the telescopic mechanism pushes the floating ring 3, causing the tilt angle between the floating ring 3 and the rotating shaft 1 and the inner wall of the fixed ring to dynamically decrease. The floating ring 3 continues to float until the sealing gap between the floating ring 3 and the rotating shaft 1 and the inner wall of the fixed ring is uniform. The telescopic ring 6 and the elastic ring 5 work together to ensure the sealing stability of the floating ring 3.
[0044] Example 4
[0045] like Figures 1-7 As shown, the present invention provides a sealing device for a hydrogen boosting device, including a rotating shaft 1 located inside the boosting device, a fixed ring 2 disposed on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passing through the rotating shaft 1, and a sealing auxiliary mechanism disposed on the floating ring 3 and located between the floating ring 3 and the fixed ring 2; the inner surface of the floating ring 3 is in clearance fit with the rotating shaft 1, and the end face of the floating ring 3 is in clearance fit with the fixed ring 2.
[0046] The fixed ring 2 has an insert groove 4 in the circumferential direction. The floating ring 3 is inserted into the insert groove 4. Two elastic rings 5 are provided in the circumferential direction in the insert groove 4. The elastic rings 5 are in contact with the outer surface of the floating ring 3. The two elastic rings 5 are located on both sides of the sealing auxiliary mechanism.
[0047] The sealing auxiliary mechanism includes two telescopic rings 6 circumferentially fitted on the outer surface of the floating ring 3, and a telescopic mechanism provided on the floating ring 3 for extending and retracting the telescopic rings 6 in the radial direction of the floating ring 3; the outer surface of the telescopic rings 6 is in contact with the inner wall of the mounting groove 4.
[0048] Two annular grooves 7 are formed circumferentially on the outer surface of the floating ring 3. Two telescopic rings 6 are respectively embedded in the two annular grooves 7. A first gap 8 is left between the end face of the telescopic ring 6 and the inner wall of the annular groove 7. The telescopic mechanism is located in the annular groove 7 and is connected to the inner surface of the telescopic ring 6.
[0049] In this embodiment 4, a first gap of 0.8-1.5mm is left between the telescopic ring and the inner wall of the annular groove, and a second gap of 0.8-1.5mm is left between the outer surface of the floating ring and the inner wall of the mounting groove. In this way, when the temperature changes in the pressurization device and the floating ring expands and contracts due to heat, the first and second gaps can provide space to accommodate the volume change of the floating ring. The telescopic ring shortens and lengthens synchronously on the floating ring as the floating ring expands and contracts due to heat, always ensuring that the telescopic ring is in close contact with the inner wall of the fixed ring, so that the floating ring can still perform its sealing function normally when the temperature changes.
[0050] When the expansion ring shortens on the floating ring, the expansion ring 6 retracts into the annular groove 7. When the expansion ring extends on the floating ring, the expansion ring 6 extends out of the annular groove 7. When the floating ring undergoes thermal expansion, the expansion ring 6 retracts into the annular groove 7; when the floating ring undergoes cold contraction, the expansion ring 6 extends out of the annular groove 7. The outer surface of the expansion ring 6 is always in contact with the inner wall of the fixed ring, ensuring the stability of the floating ring 3 when floating in the radial direction, so that the floating ring can still perform its sealing function normally under temperature changes.
[0051] Example 5
[0052] like Figures 1-7 As shown, the present invention provides a sealing device for a hydrogen boosting device, including a rotating shaft 1 located inside the boosting device, a fixed ring 2 disposed on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passing through the rotating shaft 1, and a sealing auxiliary mechanism disposed on the floating ring 3 and located between the floating ring 3 and the fixed ring 2; the inner surface of the floating ring 3 is in clearance fit with the rotating shaft 1, and the end face of the floating ring 3 is in clearance fit with the fixed ring 2.
[0053] The fixed ring 2 has an insert groove 4 in the circumferential direction. The floating ring 3 is inserted into the insert groove 4. Two elastic rings 5 are provided in the circumferential direction inside the insert groove 4. The elastic rings 5 are in contact with the outer surface of the floating ring 3. The two elastic rings 5 are located on both sides of the sealing auxiliary mechanism.
[0054] The sealing auxiliary mechanism includes two telescopic rings 6 circumferentially fitted on the outer surface of the floating ring 3, and a telescopic mechanism provided on the floating ring 3 for extending and retracting the telescopic rings 6 in the radial direction of the floating ring 3; the outer surface of the telescopic rings 6 is in contact with the inner wall of the mounting groove 4.
[0055] Two annular grooves 7 are formed on the outer surface of the floating ring 3 in the circumferential direction, and two telescopic rings 6 are respectively embedded in the two annular grooves 7, and a first gap 8 is left between the end surface of the telescopic ring 6 and the inner wall of the annular groove 7.
[0056] The telescopic mechanism is arranged in the annular groove 7 and connected to the inner surface of the telescopic ring 6.
[0057] In the embodiment 5, when the floating ring floats in the axial and radial directions and an inclination angle appears between the floating ring and the rotating shaft 1 and between the floating ring and the inner wall of the fixed ring, the telescopic ring 6 can assist the elastic ring 5, the inclined floating ring can compress the spring 9, at this time, the length of the spring 9 is reduced, the telescopic ring 6 is retracted into the annular groove 7, the spring 9 is compressed and stored energy, and in the process of the spring 9 releasing energy and restoring the deformation to a certain extent, the floating ring 3 is pushed, so that the inclination angle between the floating ring 3 and the rotating shaft 1 and between the floating ring 3 and the inner wall of the fixed ring is dynamically reduced, the floating ring 3 continues to float, and finally the sealing gaps between the floating ring 3 and the rotating shaft 1 and between the floating ring 3 and the inner wall of the fixed ring are uniform.
[0058] When the floating ring is expanded due to heat, the spring 9 is compressed, the length of the spring 9 is reduced, and the telescopic ring 6 is retracted into the annular groove 7; when the floating ring is contracted due to cold, the length of the spring 9 is increased, and the telescopic ring 6 is extended from the annular groove 7, and the outer surface of the telescopic ring 6 is always attached to the inner wall of the fixed ring, so that the stability of the floating ring 3 floating in the radial direction is ensured, and the sealing function of the floating ring can be normally played even if the temperature changes.
[0059] In the initial state, the spring 9 has a certain amount of elastic deformation, so that when the floating ring is contracted due to cold, the spring 9 with a certain amount of elastic deformation can restore the deformation and increase the length, and the telescopic ring 6 is lifted by the spring with the increased length, so that the outer surface of the telescopic ring 6 is always attached to the inner wall of the fixed ring.
[0060] Embodiment 6
[0061] As shown in Figures 1-7 The utility model provides a kind of sealing device for hydrogen delivery booster, including rotating shaft 1 in booster, still include fixed ring 2 on the shell of booster, embedded in fixed ring 2 and pass through rotating shaft 1 floating ring 3, and the sealing auxiliary mechanism for being located between floating ring 3 and fixed ring 2 and being arranged on floating ring 3;Floating ring 3 inner surface is gap cooperation with rotating shaft 1, and floating ring 3 end surface is gap cooperation with fixed ring 2.
[0062] Annular groove 4 is formed on fixed ring 2 in the circumferential direction, and floating ring 3 is embedded in annular groove 4, and two elastic rings 5 are arranged in the circumferential direction in annular groove 4, and elastic ring 5 is attached to the outer surface of floating ring 3, and two elastic rings 5 are respectively located on the two sides of sealing auxiliary mechanism.
[0063] A second gap 10 is left between the outer surface of the floating ring 3 and the inner wall of the mounting groove 4.
[0064] In this embodiment 6, a second gap 10 is left between the outer surface of the floating ring 3 and the inner wall of the mounting groove 4. The second gap 10 is 0.8-1.5mm. When the floating ring undergoes thermal expansion, the second gap 10 provides a space to accommodate the changed volume of the floating ring.
[0065] Example 7
[0066] like Figures 1-7 As shown, the present invention provides a sealing device for a hydrogen boosting device, including a rotating shaft 1 located inside the boosting device, a fixed ring 2 disposed on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passing through the rotating shaft 1, and a sealing auxiliary mechanism disposed on the floating ring 3 and located between the floating ring 3 and the fixed ring 2; the inner surface of the floating ring 3 is in clearance fit with the rotating shaft 1, and the end face of the floating ring 3 is in clearance fit with the fixed ring 2.
[0067] The fixed ring 2 has an insert groove 4 in the circumferential direction. The floating ring 3 is inserted into the insert groove 4. Two elastic rings 5 are provided in the circumferential direction inside the insert groove 4. The elastic rings 5 are in contact with the outer surface of the floating ring 3. The two elastic rings 5 are located on both sides of the sealing auxiliary mechanism.
[0068] Two annular pressure grooves 15 are formed between the outer surfaces of the fixed ring 2 and the floating ring 3. Several air inlet holes 11 are distributed circumferentially on the floating ring 3. Two vent holes 12 are opened on the floating ring 3, which are respectively connected to the air inlet holes 11 and respectively connected to the two annular pressure grooves 15. The air outlet end of the vent hole 12 is close to the end face of the floating ring 3, and the air inlet end of the air inlet hole 11 is connected to the hydrogen in the pressurization device.
[0069] In this embodiment 7, hydrogen gas in the pressurization device is transported through the air inlet 11 and the air outlet 12 and then enters the annular pressure groove 15. It then enters the sealing gap between the end face of the floating ring 3 and the inner wall of the fixed ring 2 from the annular pressure groove 15, thereby forming a fluid film in the sealing gap between the end face of the floating ring 3 and the inner wall of the fixed ring 2, so that the floating ring 3 floats along the axial direction.
[0070] Example 8
[0071] like Figures 1-7 As shown, the present invention provides a sealing device for a hydrogen boosting device, including a rotating shaft 1 located inside the boosting device, a fixed ring 2 disposed on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passing through the rotating shaft 1, and a sealing auxiliary mechanism disposed on the floating ring 3 and located between the floating ring 3 and the fixed ring 2; the inner surface of the floating ring 3 is in clearance fit with the rotating shaft 1, and the end face of the floating ring 3 is in clearance fit with the fixed ring 2.
[0072] The fixed ring 2 is provided with an embedding groove 4 in the circumference, the floating ring 3 is embedded in the embedding groove 4, two elastic rings 5 are provided in the embedding groove 4 in the circumference, the elastic rings 5 are attached to the outer surface of the floating ring 3, and the two elastic rings 5 are respectively located on the two sides of the sealing auxiliary mechanism.
[0073] Two annular pressure grooves 15 are formed between the outer surfaces of the fixed ring 2 and the floating ring 3, a plurality of air guide holes 11 are distributed in the circumference of the floating ring 3, two air holes 12 are provided on the floating ring 3 and connected to the air guide holes 11 and the annular pressure grooves 15 respectively, the air outlet end of the air hole 12 is close to the end surface of the floating ring 3, and the air inlet end of the air guide hole 11 is communicated with hydrogen in the supercharging device.
[0074] The inner surface of the floating ring 3 is provided with a gas conveying hole 13 communicated with the air guide hole 11.
[0075] In the embodiment 8, hydrogen in the supercharging device is conveyed to the gas conveying hole 13 through the air guide hole 11, and then enters the sealing gap between the inner surface of the floating ring 3 and the outer wall of the rotating shaft, so that a fluid film is formed in the sealing gap between the inner surface of the floating ring 3 and the outer wall of the rotating shaft, and the floating ring 3 realizes radial floating.
[0076] Embodiment 9
[0077] As shown in Figures 1-7 The utility model provides a kind of sealing device for hydrogen conveying supercharging device, including rotating shaft 1 in supercharging device, still include the fixed ring 2 of being located on the shell of supercharging device, embedding in fixed ring 2 and being worn on rotating shaft 1 floating ring 3, and the sealing auxiliary mechanism being located between floating ring 3 and fixed ring 2 and being arranged on floating ring 3;Floating ring 3 inner surface and rotating shaft 1 gap cooperation, floating ring 3 end surface and fixed ring 2 gap cooperation.
[0078] Metal ring 14 is arranged in floating ring 3.
[0079] In the embodiment 9, the metal ring 14 is used to enhance the overall strength and rigidity of the floating ring 3, and improve the durability of the floating ring 3.
[0080] It should be finally pointed out that: the above embodiments are merely the preferred embodiments of the utility model for describing the technical scheme of the utility model, rather than limiting it, of course, it is not the patent range of the utility model; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the range of the technical scheme of the embodiments of the utility model; that is to say, as long as the substantive meaning of the modification or polishing made in the main design idea and spirit of the utility model has no substantive meaning, the technical problem solved is still consistent with the utility model, and should be included in the protection range of the utility model; in addition, the technical scheme of the utility model is directly or indirectly used in other related technical fields, which is also included in the patent protection range of the utility model.
Claims
1. A sealing device for a hydrogen booster unit, comprising a rotating shaft (1) located within the booster unit, characterized in that, It also includes a fixed ring (2) on the housing of the booster device, a floating ring (3) embedded in the fixed ring (2) and passing through the rotating shaft (1), and a sealing auxiliary mechanism on the floating ring (3) and located between the floating ring (3) and the fixed ring (2); the inner surface of the floating ring (3) is in clearance fit with the rotating shaft (1), and the end face of the floating ring (3) is in clearance fit with the fixed ring (2).
2. The sealing device for a hydrogen booster unit according to claim 1, characterized in that, The fixed ring (2) has an insert groove (4) and the floating ring (3) is inserted into the insert groove (4). Two elastic rings (5) are provided in the insert groove (4). The elastic rings (5) are in contact with the outer surface of the floating ring (3). The two elastic rings (5) are located on both sides of the sealing auxiliary mechanism.
3. The sealing device for a hydrogen booster unit according to claim 2, characterized in that, The sealing auxiliary mechanism includes two telescopic rings (6) fitted on the outer surface of the floating ring (3), and a telescopic mechanism provided on the floating ring (3) for extending and retracting the telescopic rings (6) in the radial direction of the floating ring (3); The outer surface of the telescopic ring (6) is in contact with the inner wall of the mounting groove (4).
4. The sealing device for a hydrogen booster unit according to claim 3, characterized in that, Two annular grooves (7) are opened circumferentially on the outer surface of the floating ring (3). Two telescopic rings (6) are respectively embedded in the two annular grooves (7). A first gap (8) is left between the end face of the telescopic ring (6) and the inner wall of the annular groove (7). The telescopic mechanism is located in the annular groove (7) and connected to the inner surface of the telescopic ring (6).
5. A sealing device for a hydrogen booster unit according to claim 4, characterized in that, The telescopic mechanism includes several springs (9) evenly distributed in the annular groove (7); the two ends of the springs (9) are respectively connected between the inner wall of the annular groove (7) and the inner surface of the telescopic ring (6).
6. A sealing device for a hydrogen booster unit according to claim 2, characterized in that, A second gap (10) is left between the outer surface of the floating ring (3) and the inner wall of the mounting groove (4).
7. A sealing device for a hydrogen booster unit according to claim 2, characterized in that, Two annular pressure grooves (15) are formed between the outer surfaces of the fixed ring (2) and the floating ring (3). Several air inlet holes (11) are distributed circumferentially on the floating ring (3). Two ventilation holes (12) are opened on the floating ring (3), which are respectively connected to the air inlet holes (11) and respectively connected to the two annular pressure grooves (15). The outlet end of the ventilation hole (12) is close to the end face of the floating ring (3), and the inlet end of the air inlet hole (11) is connected to the hydrogen in the pressurization device.
8. A sealing device for a hydrogen booster unit according to claim 7, characterized in that, An air delivery hole (13) communicating with the air intake hole (11) is provided on the inner surface of the floating ring (3).
9. A sealing device for a hydrogen booster unit according to claim 1, characterized in that, A metal ring (14) is provided inside the floating ring (3).
10. A sealing device for a hydrogen booster unit according to claim 1, characterized in that, The gap between the inner surface of the floating ring (3) and the rotating shaft (1) is 5-20 μm, and the gap between the end face of the floating ring (3) and the fixed ring (2) is 5-20 μm.