Sealing device for hydrogen transport supercharging device

Abstract

The invention discloses a sealing device for a hydrogen conveying supercharging device. The technical problem that the sealing performance of a traditional sealing structure is reduced due to the fact that the traditional sealing structure is easily affected by high pressure and temperature changes in the supercharging device is solved. Comprising a rotating shaft located in the supercharging device and further comprises a fixing ring arranged on a shell of the supercharging device, a floating ring embedded in the fixing ring and arranged on the rotating shaft in a penetrating mode, and a sealing auxiliary mechanism arranged on the floating ring and located between the floating ring and the fixing ring. The inner surface of the floating ring is in clearance fit with the rotating shaft. Compared with a traditional sealing structure, the high-pressure influence in the supercharging device is effectively converted, the sealing structure can normally play a role under the high pressure, and the sealing performance is kept; the sealing device can adapt to the temperature change in the supercharging device, and can still normally play a sealing role under the condition that the temperature in the supercharging device changes.

Description

Technical Field

[0001] The invention belongs to the technical field of booster device sealing, and in particular relates to a sealing device for a hydrogen transmission booster device. Background Art

[0002] With the transformation of the global energy structure, hydrogen energy, as an important component of clean energy, has attracted increasing attention for its storage and transportation technology. Pipeline transportation is one of the effective ways to transport hydrogen over long distances, but during the pressurization process, how to ensure the sealing reliability of the supercharging device becomes a key challenge. The sealing performance of traditional sealing mechanisms, such as metal sealing rings and rubber sealing rings, is easily affected by high pressure and temperature changes in the supercharging device, resulting in a decrease in sealing performance, which poses a safety hazard of hydrogen leakage. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a sealing device for a hydrogen transmission boosting device, which solves the technical problem that the traditional sealing structure is easily affected by the high pressure and temperature changes in the boosting device and the sealing performance is reduced.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A sealing device for a hydrogen transmission boosting device comprises a rotating shaft located in the boosting device, a fixed ring arranged on the outer shell of the boosting device, a floating ring embedded in the fixed ring and passed through the rotating shaft, and a sealing auxiliary mechanism arranged on the floating ring and located between the floating ring and the fixed ring; the inner surface of the floating ring is in clearance fit with the rotating shaft, and the end surface of the floating ring is in clearance fit with the fixed ring.

[0006] Furthermore, an embedding groove is provided on the fixed ring, the floating ring is embedded in the embedding groove, two elastic rings are arranged in the embedding groove, the elastic rings are fitted with the outer surface of the floating ring, and the two elastic rings are respectively located on both sides of the sealing auxiliary mechanism.

[0007] Furthermore, the sealing auxiliary mechanism includes two telescopic rings sleeved on the outer surface of the floating ring, and a telescopic mechanism arranged on the floating ring for making the telescopic ring telescope along the radial direction of the floating ring; the outer surface of the telescopic ring fits the inner wall of the embedding groove.

[0008] Furthermore, two annular grooves are circumferentially arranged on the outer surface of the floating ring, and two telescopic rings are respectively embedded in the two annular grooves, leaving a first gap between the end surface of the telescopic ring and the inner wall of the annular groove; the telescopic mechanism is arranged in the annular groove and connected to the inner surface of the telescopic ring.

[0009] Furthermore, the telescopic mechanism includes a plurality of springs evenly distributed in the annular groove; two ends of the springs are respectively connected between the inner wall of the annular groove and the inner surface of the telescopic ring.

[0010] Furthermore, a second gap is left between the outer surface of the floating ring and the inner wall of the embedding groove.

[0011] Furthermore, two annular pressure grooves are formed between the outer surfaces of the fixed ring and the floating ring, a plurality of air intake holes are distributed circumferentially on the floating ring, and two air vents are provided on the floating ring, which are respectively connected from the air intake holes and connected to the two annular pressure grooves; the air outlet end of the air vent is close to the end face of the floating ring, and the air inlet end of the air intake hole is connected to the hydrogen in the supercharging device.

[0012] Furthermore, an air delivery hole connected to the air inlet hole is provided on the inner surface of the floating ring.

[0013] Furthermore, a metal ring is arranged inside the floating ring.

[0014] Furthermore, the gap between the inner surface of the floating ring and the rotating shaft is 5-20 μm, and the gap between the end surface of the floating ring and the fixed ring is 5-20 μm.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention has a simple structure, a scientific and reasonable design, and is easy to use. The floating ring of the present invention performs dynamic sealing on the rotating shaft. Under the influence of the rotation of the rotating shaft and the high pressure in the supercharging device, the floating ring freely floats in the axial and radial directions between the rotating shaft and the fixed ring. There is a sealing gap between the floating floating ring and the rotating shaft and the fixed ring. The sealing gap is small, the hydrogen leakage is low, and the sealing effect is good. Compared with the static seal of the traditional structure, the present invention effectively transforms the high pressure influence in the supercharging device, can function normally under high pressure, and maintains the sealing performance; after floating, the floating ring is automatically aligned with the axis by the elastic ring and the telescopic ring, so that the sealing gap between the inner surface of the floating ring and the outer wall of the rotating shaft is uniform. The sealing gap between the end face of the floating ring and the inner wall of the fixed ring is uniform, thereby realizing stable sealing of the rotating shaft; the telescopic ring of the present invention can be telescoped along the radial direction of the floating ring, and a first gap is left between the telescopic ring and the inner wall of the annular groove, and a second gap is left between the outer surface of the floating ring and the inner wall of the embedding groove. In this way, when the temperature in the boosting device changes and the floating ring expands and contracts due to heat, the first gap and the second gap can provide a space for accommodating the volume change of the floating ring, and the telescopic ring shortens and lengthens on the floating ring synchronously with the thermal expansion and contraction of the floating ring, thereby always ensuring that the telescopic ring fits the inner wall of the fixed ring, so that the floating ring can still perform a normal sealing function when the temperature changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the structure of the present invention.

[0018] Figure 2 A cross-sectional view of the fixing ring.

[0019] Figure 3Schematic diagram of the appearance of the floating ring.

[0020] Figure 4 Schematic diagram of the appearance of the telescopic ring.

[0021] Figure 5 It is a cross-sectional view of the telescopic ring embedded in the floating ring.

[0022] Figure 6 This is a schematic diagram of the air inlet ends of the air ducts distributed on the end surface of the floating ring.

[0023] Figure 7 This is a cross-sectional view of the floating ring.

[0024] The names corresponding to the reference numerals 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 inlet hole, 12-vent hole, 13-air delivery hole, 14-metal ring, 15-annular pressure groove. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore they cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; of course, it can also be a mechanical connection or an electrical connection; in addition, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example 1

[0030] like Figure 1-7 As shown, the present invention provides a sealing device for a hydrogen transmission boosting device, comprising a rotating shaft 1 located in the boosting device, a fixed ring 2 arranged on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passed through the rotating shaft 1, and a sealing auxiliary mechanism arranged 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 surface of the floating ring 3 is in clearance fit with the fixed ring 2.

[0031] In the present invention, 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 surface of the floating ring 3 and the fixed ring 2 is 5-20 μm.

[0032] The present invention has a simple structure, a scientific and reasonable design, and is easy to use. The floating ring of the present invention performs dynamic sealing on the rotating shaft. Under the influence of the rotation of the rotating shaft and the high pressure in the supercharging device, the floating ring freely floats in the axial and radial directions between the rotating shaft and the fixed ring. There is a sealing gap between the floating floating ring and the rotating shaft and the fixed ring. The sealing gap is small, the hydrogen leakage is low, and the sealing effect is good. Compared with the static seal of the traditional structure, the present invention effectively transforms the high pressure influence in the supercharging device, can function normally under high pressure, and maintains the sealing performance; after floating, the floating ring is automatically aligned with the axis by the elastic ring and the telescopic ring, so that the sealing gap between the inner surface of the floating ring and the outer wall of the rotating shaft is uniform, and the gap between the end face of the floating ring and the inner wall of the fixed ring is uniform. The sealing gap is uniform, and a stable seal of the rotating shaft is achieved; the telescopic ring of the present invention can be telescoped along the radial direction of the floating ring, and a first gap is left between the telescopic ring and the inner wall of the annular groove, the first gap is 0.8-1.5mm, and a second gap is left between the outer surface of the floating ring and the inner wall of the embedding groove, the second gap is 0.8-1.5mm, so that when the temperature changes in the booster device and the floating ring expands and contracts due to heat, the first gap and the second gap can provide a space for the volume change of the floating ring, and the telescopic ring shortens and lengthens on the floating ring synchronously with the thermal expansion and contraction of the floating ring, so as to always ensure that the telescopic ring fits the inner wall of the fixed ring, so that the floating ring can still play a normal sealing role when the temperature changes.

[0033] Example 2

[0034] like Figure 1-7 As shown, the present invention provides a sealing device for a hydrogen transmission boosting device, comprising a rotating shaft 1 located in the boosting device, a fixed ring 2 arranged on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passed through the rotating shaft 1, and a sealing auxiliary mechanism arranged 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 surface of the floating ring 3 is in clearance fit with the fixed ring 2.

[0035] The fixed ring 2 is provided with an embedding groove 4 circumferentially, the floating ring 3 is embedded in the embedding groove 4 , two elastic rings 5 ​​are circumferentially arranged in the embedding groove 4 , the elastic ring 5 is in contact with the outer surface of the floating ring 3 , and the two elastic rings 5 ​​are respectively located on both sides of the sealing auxiliary mechanism.

[0036] In the second embodiment, when the floating ring 3 floats in the axial and radial directions and an inclination angle appears between the floating ring 3 and the rotating shaft 1 and the inner wall of the fixed ring, the floating ring 3 will squeeze the elastic ring 5, and the elastic ring 5 will be elastically deformed and store energy under the extrusion. In the process of releasing energy and restoring deformation, the elastic ring 5 pushes the floating ring 3, so that the inclination angle between the floating ring 3 and the rotating shaft 1 and the inner wall of the fixed ring is dynamically reduced, and 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 role of the elastic ring 5 is to make the sealing gap between the inner surface of the floating ring 3 and the outer wall of the rotating shaft 1 uniform, and the sealing gap between the end face of the floating ring and the inner wall of the fixed ring uniform, so as to ensure the sealing stability of the floating ring 3.

[0037] The hydrogen in the booster device enters the sealing gap between the inner surface of the floating ring 3 and the outer wall of the rotating shaft 1 to form a fluid film, and enters the sealing gap between the end face of the floating ring and the inner wall of the fixed ring to form a fluid film. The fluid film has a bearing function, so that the floating ring 3 can float.

[0038] Example 3

[0039] like Figure 1-7 As shown, the present invention provides a sealing device for a hydrogen transmission boosting device, comprising a rotating shaft 1 located in the boosting device, a fixed ring 2 arranged on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passed through the rotating shaft 1, and a sealing auxiliary mechanism arranged 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 surface of the floating ring 3 is in clearance fit with the fixed ring 2.

[0040] The fixed ring 2 is provided with an embedding groove 4 circumferentially, the floating ring 3 is embedded in the embedding groove 4 , two elastic rings 5 ​​are circumferentially arranged in the embedding groove 4 , the elastic ring 5 is in contact with the outer surface of the floating ring 3 , and the two elastic rings 5 ​​are respectively located on both sides of the sealing auxiliary mechanism.

[0041] The sealing auxiliary mechanism includes two telescopic rings 6 circumferentially mounted on the outer surface of the floating ring 3 and a telescopic mechanism arranged on the floating ring 3 for making the telescopic ring 6 telescope in the radial direction of the floating ring 3; the outer surface of the telescopic ring 6 fits with the inner wall of the embedding groove 4.

[0042] In this embodiment 3, the elastic ring 5 is elastic, the telescopic ring 6 can be telescopic in the radial direction of the floating ring 3, and the inner surface of the floating ring 3 is in clearance with the outer wall of the rotating shaft, so that 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 embedding groove 4, so that the stability of the floating ring 3 when floating in the radial direction is guaranteed.

[0043] When the floating ring floats in the axial and radial directions and an inclination angle occurs between the floating ring and the rotating shaft 1 and the inner wall of the fixed ring, the telescopic ring 6 can assist the elastic ring 5. The tilted floating ring will compress the telescopic mechanism. At this time, the telescopic ring 6 retracts into the annular groove 7, and the telescopic mechanism is compressed and stores energy. During the process of the telescopic mechanism releasing energy by itself, the floating ring 3 is pushed, so that the inclination angle between the floating ring 3 and the rotating shaft 1 and the inner wall of the fixed ring is dynamically reduced, and 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 auxiliary elastic ring 5 work together to ensure the sealing stability of the floating ring 3.

[0044] Example 4

[0045] like Figure 1-7 As shown, the present invention provides a sealing device for a hydrogen transmission boosting device, comprising a rotating shaft 1 located in the boosting device, a fixed ring 2 arranged on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passed through the rotating shaft 1, and a sealing auxiliary mechanism arranged 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 surface of the floating ring 3 is in clearance fit with the fixed ring 2.

[0046] The fixed ring 2 is provided with an embedding groove 4 circumferentially, the floating ring 3 is embedded in the embedding groove 4 , two elastic rings 5 ​​are circumferentially arranged in the embedding groove 4 , the elastic ring 5 is in contact with the outer surface of the floating ring 3 , and the two elastic rings 5 ​​are respectively located on both sides of the sealing auxiliary mechanism.

[0047] The sealing auxiliary mechanism includes two telescopic rings 6 circumferentially mounted on the outer surface of the floating ring 3 and a telescopic mechanism arranged on the floating ring 3 for making the telescopic ring 6 telescope in the radial direction of the floating ring 3; the outer surface of the telescopic ring 6 fits with the inner wall of the embedding groove 4.

[0048] Two annular grooves 7 are circumferentially provided 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 surface of the telescopic ring 6 and the inner wall of the annular groove 7. The telescopic mechanism is arranged in the annular groove 7 and connected to the inner surface of the telescopic ring 6.

[0049] In the present embodiment 4, a first gap is left between the telescopic ring and the inner wall of the annular groove, and the first gap is 0.8-1.5mm. A second gap is left between the outer surface of the floating ring and the inner wall of the embedding groove, and the second gap is 0.8-1.5mm. In this way, when the temperature changes in the boosting device and the floating ring expands and contracts due to heat and cold, the first gap and the second gap can provide a space for accommodating the volume change of the floating ring, and the telescopic ring shrinks and stretches on the floating ring synchronously with the thermal expansion and contraction of the floating ring, so as to always ensure that the telescopic ring fits the inner wall of the fixed ring, so that the floating ring can still perform a normal sealing function when the temperature changes.

[0050] When the telescopic ring is shortened on the floating ring, the telescopic ring 6 is retracted into the annular groove 7. When the telescopic ring is extended on the floating ring, the telescopic ring 6 is extended from the annular groove 7. When the floating ring is thermally expanded, the telescopic ring 6 is retracted into the annular groove 7. When the floating ring is cold-contracted, the telescopic ring 6 is extended from the annular groove 7. The outer surface of the telescopic ring 6 is always in contact with the inner wall of the fixed ring, which ensures the stability of the floating ring 3 when floating in the radial direction, so that the floating ring can still play a normal sealing role when the temperature changes.

[0051] Example 5

[0052] like Figure 1-7 As shown, the present invention provides a sealing device for a hydrogen transmission boosting device, comprising a rotating shaft 1 located in the boosting device, a fixed ring 2 arranged on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passed through the rotating shaft 1, and a sealing auxiliary mechanism arranged 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 surface of the floating ring 3 is in clearance fit with the fixed ring 2.

[0053] The fixed ring 2 is provided with an embedding groove 4 circumferentially, the floating ring 3 is embedded in the embedding groove 4 , two elastic rings 5 ​​are circumferentially arranged in the embedding groove 4 , the elastic ring 5 is in contact with the outer surface of the floating ring 3 , and the two elastic rings 5 ​​are respectively located on both sides of the sealing auxiliary mechanism.

[0054] The sealing auxiliary mechanism includes two telescopic rings 6 circumferentially mounted on the outer surface of the floating ring 3 and a telescopic mechanism arranged on the floating ring 3 for making the telescopic ring 6 telescope in the radial direction of the floating ring 3; the outer surface of the telescopic ring 6 fits with the inner wall of the embedding groove 4.

[0055] Two annular grooves 7 are circumferentially provided 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 surface of the telescopic ring 6 and the inner wall of the annular groove 7. The telescopic mechanism is arranged in the annular groove 7 and connected to the inner surface of the telescopic ring 6.

[0056] The telescopic mechanism includes a plurality of springs 9 uniformly distributed in the annular groove 7 ; the springs 9 are connected between the inner wall of the annular groove 7 and the inner surface of the telescopic ring 6 .

[0057] In this 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 the inner wall of the fixed ring, the telescopic ring 6 can assist the elastic ring 5, and the tilted floating ring will compress the spring 9. At this time, the length of the spring 9 becomes smaller, and the telescopic ring 6 shrinks into the annular groove 7. The spring 9 is compressed and stores energy. The spring 9 releases energy by itself and restores the deformation to a certain extent, pushing the floating ring 3, so that the inclination angle between the floating ring 3 and the rotating shaft 1 and the inner wall of the fixed ring is dynamically reduced, and 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.

[0058] When the floating ring undergoes thermal expansion, the spring 9 is squeezed, the length of the spring 9 becomes smaller, and the telescopic ring 6 shrinks into the annular groove 7. When the floating ring undergoes cold contraction, the length of the spring 9 becomes longer, and the telescopic ring 6 extends out of the annular groove 7. The outer surface of the telescopic ring 6 always fits 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 a normal sealing function when the temperature changes.

[0059] In the initial state, the spring 9 has a certain amount of elastic deformation. In this way, when the floating ring undergoes cold contraction, the spring 9 with a certain amount of elastic deformation can recover the deformation and become longer, and the longer spring lifts the telescopic ring 6 so that the outer surface of the telescopic ring 6 always fits the inner wall of the fixed ring.

[0060] Example 6

[0061] like Figure 1-7 As shown, the present invention provides a sealing device for a hydrogen transmission boosting device, comprising a rotating shaft 1 located in the boosting device, a fixed ring 2 arranged on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passed through the rotating shaft 1, and a sealing auxiliary mechanism arranged 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 surface of the floating ring 3 is in clearance fit with the fixed ring 2.

[0062] The fixed ring 2 is provided with an embedding groove 4 circumferentially, the floating ring 3 is embedded in the embedding groove 4 , two elastic rings 5 ​​are circumferentially arranged in the embedding groove 4 , the elastic ring 5 is in contact with the outer surface of the floating ring 3 , and the two elastic rings 5 ​​are respectively located on both sides of the 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 embedding 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 embedding groove 4. The second gap 10 is 0.8-1.5 mm. When the floating ring undergoes thermal expansion, the second gap 10 provides a space for accommodating the changed volume of the floating ring.

[0065] Example 7

[0066] like Figure 1-7 As shown, the present invention provides a sealing device for a hydrogen transmission boosting device, comprising a rotating shaft 1 located in the boosting device, a fixed ring 2 arranged on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passed through the rotating shaft 1, and a sealing auxiliary mechanism arranged 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 surface of the floating ring 3 is in clearance fit with the fixed ring 2.

[0067] The fixed ring 2 is provided with an embedding groove 4 circumferentially, the floating ring 3 is embedded in the embedding groove 4 , two elastic rings 5 ​​are circumferentially arranged in the embedding groove 4 , the elastic ring 5 is in contact with the outer surface of the floating ring 3 , and the two elastic rings 5 ​​are respectively located on both sides of the sealing auxiliary mechanism.

[0068] Two annular grooves 15 are formed between the outer surfaces of the fixed ring 2 and the floating ring 3. A plurality of air holes 11 are distributed circumferentially on the floating ring 3. Two air vents 12 are provided on the floating ring 3, which are connected to the air holes 11 and to the two annular grooves 15 respectively. The outlet end of the air vent 12 is close to the end face of the floating ring 3, and the inlet end of the air hole 11 is connected to the hydrogen in the supercharging device.

[0069] In this embodiment 7, the hydrogen in the boosting device is transported through the air inlet holes 11 and the air vents 12 and then enters the annular pressure groove 15, and 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 can float in the axial direction.

[0070] Example 8

[0071] like Figure 1-7 As shown, the present invention provides a sealing device for a hydrogen transmission boosting device, comprising a rotating shaft 1 located in the boosting device, a fixed ring 2 arranged on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passed through the rotating shaft 1, and a sealing auxiliary mechanism arranged 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 surface 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 circumferentially, the floating ring 3 is embedded in the embedding groove 4 , two elastic rings 5 ​​are circumferentially arranged in the embedding groove 4 , the elastic ring 5 is in contact with the outer surface of the floating ring 3 , and the two elastic rings 5 ​​are respectively located on both sides of the sealing auxiliary mechanism.

[0073] Two annular grooves 15 are formed between the outer surfaces of the fixed ring 2 and the floating ring 3. A plurality of air holes 11 are distributed circumferentially on the floating ring 3. Two air vents 12 are provided on the floating ring 3, which are connected to the air holes 11 and to the two annular grooves 15 respectively. The outlet end of the air vent 12 is close to the end face of the floating ring 3, and the inlet end of the air hole 11 is connected to the hydrogen in the supercharging device.

[0074] An air delivery hole 13 connected to the air inlet hole 11 is provided on the inner surface of the floating ring 3 .

[0075] In this embodiment 8, the hydrogen in the boosting device is transported to the gas delivery hole 13 through the gas inlet 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 from the gas delivery hole 13, thereby forming a fluid film in the sealing gap between the inner surface of the floating ring 3 and the outer wall of the rotating shaft, so that the floating ring 3 can float in the radial direction.

[0076] Example 9

[0077] like Figure 1-7 As shown, the present invention provides a sealing device for a hydrogen transmission boosting device, comprising a rotating shaft 1 located in the boosting device, a fixed ring 2 arranged on the outer shell of the boosting device, a floating ring 3 embedded in the fixed ring 2 and passed through the rotating shaft 1, and a sealing auxiliary mechanism arranged 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 surface of the floating ring 3 is in clearance fit with the fixed ring 2.

[0078] A metal ring 14 is arranged inside the floating ring 3 .

[0079] In this 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] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than limiting them, and certainly not limiting the patent scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In other words, any changes or modifications made to the main design concept and spirit of the present invention that have no substantive significance, and the technical problems they solve are still consistent with the present invention, should be included in the protection scope of the present invention. In addition, the direct or indirect application of the technical solutions of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

Claims

1. A sealing device for a hydrogen transmission boosting device, comprising a rotating shaft (1) located in the boosting device, characterized in that: It also includes a fixed ring (2) arranged on the housing of the supercharging device, a floating ring (3) embedded in the fixed ring (2) and inserted on the rotating shaft (1), and a sealing auxiliary mechanism arranged 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 surface of the floating ring (3) is in clearance fit with the fixed ring (2).

2. A sealing device for a hydrogen transmission and pressurizing device according to claim 1, characterized in that: The fixed ring (2) is provided with an embedding groove (4), the floating ring (3) is embedded in the embedding groove (4), two elastic rings (5) are arranged in the embedding groove (4), the elastic rings (5) are in contact with the outer surface of the floating ring (3), and the two elastic rings (5) are respectively located on both sides of the sealing auxiliary mechanism.

3. A sealing device for a hydrogen transmission and pressurizing device according to claim 2, characterized in that: The sealing auxiliary mechanism comprises two telescopic rings (6) sleeved on the outer surface of the floating ring (3), and a telescopic mechanism arranged on the floating ring (3) for making the telescopic ring (6) telescope along 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 embedding groove (4).

4. A sealing device for a hydrogen transmission and pressurizing device according to claim 3, characterized in that: Two annular grooves (7) are circumferentially formed 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 surface of the telescopic ring (6) and the inner wall of the annular groove (7); and the telescopic mechanism is arranged in the annular groove (7) and connected to the inner surface of the telescopic ring (6).

5. A sealing device for a hydrogen transmission and pressurizing device according to claim 4, characterized in that: The telescopic mechanism comprises a plurality of springs (9) uniformly distributed in the annular groove (7); 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 transmission and pressurizing device 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 embedding groove (4).

7. A sealing device for a hydrogen transmission and pressurizing device according to claim 2, characterized in that: Two annular grooves (15) are formed between the outer surfaces of the fixed ring (2) and the floating ring (3); a plurality of air inlet holes (11) are distributed circumferentially on the floating ring (3); and two air vents (12) are provided on the floating ring (3) and are connected to the two annular grooves (15) respectively. The air outlet end of the air vent (12) is close to the end surface of the floating ring (3), and the air inlet end of the air inlet hole (11) is connected to the hydrogen in the supercharging device.

8. A sealing device for a hydrogen transport and pressurizing device according to claim 7, characterized in that: An air delivery hole (13) connected to the air inlet hole (11) is provided on the inner surface of the floating ring (3).

9. A sealing device for a hydrogen transport and pressurizing device according to claim 1, characterized in that: A metal ring (14) is arranged inside the floating ring (3).

10. A sealing device for a hydrogen transport and pressurizing device 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 surface of the floating ring (3) and the fixed ring (2) is 5-20 μm.

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