High-temperature double-end-face stirring dry gas sealing device

Abstract

The invention discloses a high-temperature double-end-face stirring dry gas sealing device which comprises a shaft piece, a shaft sleeve is fixedly sleeved on the shaft piece in a sealing mode, and a cooling water tank is sleeved on the shaft piece located outside the end, facing the medium side, of the shaft sleeve at intervals. A static ring seat sleeves the outer side of the shaft sleeve, a sealing box body is jointly mounted between the static ring seat and the cooling water tank, and a dynamic and static ring sealing assembly is mounted on the shaft sleeve positioned on the inner side of the sealing box body; the cooling water tank is internally provided with a cavity surrounding the shaft part in the circumferential direction, and the cooling water tank is provided with a cooling water inlet and outlet communicating with the cavity. In the axial direction from the medium side to the atmosphere side, the shaft piece is sequentially sleeved with the cooling water tank and the movable and static ring sealing assembly, and therefore the medium side can be effectively cooled through the cooling water tank arranged in the circumferential direction in a surrounding mode, the influence of the temperature on a sealing part is reduced or even avoided, stable and reliable use of the movable and static ring sealing assembly is greatly guaranteed and improved, and the service life of the movable and static ring sealing assembly is prolonged. The cable is especially suitable for a high-temperature environment of 200 DEG C or above.

Description

Technical Field

[0001] This invention relates to the field of sealing device technology, and in particular to a high-temperature double-end-face stirring dry gas sealing device. Background Technology

[0002] The end-face dry gas sealing device is based on a pair of end-face mating dynamic and static rings. When sealing gas (such as nitrogen) enters the sealing device, it will cause the end faces of the dynamic and static rings to open and separate from each other. The dynamic ring rotates at high speed with the rotating shaft, while the static ring remains stationary in the housing. The dynamic and static rings do not contact each other or wear during use, thus achieving and satisfying the seal between the rotating shaft and the stationary housing. It can be used in harsh conditions such as high pressure and high speed in fields such as medicine, semiconductors, and new energy.

[0003] In existing technologies, dry gas seals are typically used at temperatures below 200°C, and in reality, very few applications reach 200°C, with most operating around 150°C. For end-face dry gas seal devices, the sealing gas needs to remain stable to ensure that the moving and stationary rings are open to each other and do not come into contact. At high temperatures, especially above 200°C, the gas expands in a gaseous phase and becomes difficult to stabilize, severely affecting the relative opening and maintenance of the moving and stationary rings, and may even prevent them from smoothly separating. Furthermore, the temperature difference between high and normal temperatures will cause condensation in the seal device, severely impacting its normal operation.

[0004] Therefore, existing end-face dry gas sealing devices are difficult to use in high-temperature environments. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a high-temperature double-end face stirring dry gas sealing device with a reasonable structure, thereby reducing or even eliminating the influence of temperature on the sealing components, greatly ensuring and improving the stable and reliable use of the dynamic and static ring sealing assembly, and is especially suitable for high-temperature environments above 200℃.

[0006] The technical solution adopted in this invention is as follows: A high-temperature double-end face stirring dry gas sealing device includes a shaft, on which a bushing is fixedly fitted with a sealing sleeve. A cooling water tank is spaced out on the shaft located at the end of the bushing facing the medium side. A stationary ring seat is fitted on the outer side of the bushing. A sealing box is installed between the stationary ring seat and the cooling water tank. A dynamic and stationary ring sealing assembly is installed on the bushing located inside the sealing box. A cavity surrounding the shaft is provided inside the cooling water tank, and a cooling water inlet and outlet communicating with the cavity are provided on the cooling water tank.

[0007] As a further improvement to the above technical solution: The cooling water tank has a partition in its cavity, which divides the cavity into an inner cavity and an outer cavity that are in communication. The cooling water inlet and outlet include a cooling water inlet that is in communication with the inner cavity and a cooling water outlet that is in communication with the outer cavity. The inner cavity is located on the inner side of the outer cavity facing the shaft.

[0008] A gap is provided between the end of the partition facing the medium and the inner wall of the cavity so that the inner and outer cavities are connected, and the end of the partition facing away from the medium is connected to the inner wall of the cavity.

[0009] The cooling water tank includes a tank body circumferentially arranged around the shaft, with a cavity formed on the end face of the tank body along the circumferential direction; it also includes a tank seat fitted on the end face of the tank body, which closes and seals the cavity.

[0010] A collection groove is installed on the inner side of the end face of the cooling water tank facing away from the medium, forming a collection cavity with the opening facing the bushing; a flange extends from the end face of the bushing located inside the dynamic and static ring sealing assembly, and the flange extends to the outer side of the collection groove, with the flange facing the opening of the collection cavity; a collection hole communicating with the collection cavity is opened on the cooling water tank; the collection hole is normally closed.

[0011] The dynamic and static ring sealing assembly includes an atmospheric side dynamic and static ring sealing assembly and a medium side dynamic and static ring sealing assembly. The dynamic rings in the two sets of dynamic and static ring sealing assemblies are installed opposite each other on the bushing and rotate with the bushing. The static rings in the two sets of dynamic and static ring sealing assemblies are respectively opposite to the corresponding dynamic rings and are installed in the static ring seat and the cooling water tank.

[0012] The stationary ring seat is provided with a purge port, which is connected to the inner side of the dynamic and stationary ring sealing assembly on the atmospheric side through the gap between the inner circumferential surface of the stationary ring seat and the bushing; the purge port is connected to an external air source and air is introduced into the gap between the inner side of the stationary ring seat and the bushing.

[0013] The bushing extends circumferentially to form a convex ring portion, and the two end faces of the convex ring portion are provided with receiving cavities facing away from each other, and the moving ring is housed in the receiving cavity; the end face of the moving ring and the bottom surface of the receiving cavity are press-fitted with end glyphs, and the moving ring is fixed relative to the bushing in the circumferential direction by a pin.

[0014] The stationary ring seat has an upper cavity for equipping the stationary ring, and the cooling water tank has a lower cavity for equipping another stationary ring. The end of the stationary ring extending into the upper or lower cavity is equipped with a sealing ring, a push ring, and an elastic element. The elastic element drives the stationary ring to conform to the moving ring via the push ring. It also includes a retaining element, which restricts the displacement of the stationary ring away from the elastic element.

[0015] The sealed housing has a sealing gas inlet and outlet. The inlet of the sealing gas inlet and outlet is used to allow air to enter the sealed housing, causing the stationary ring to move axially and separate from the moving ring. The outlet of the sealing gas inlet and outlet leads the gas in the sealed housing to an external exhaust gas collection system. The inlet and outlet of the sealing gas inlet and outlet are located at both ends of the same diameter direction of the sealed housing.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention involves sequentially mounting a cooling water tank and a dynamic and static ring sealing assembly on a shaft along the axial direction from the medium side to the atmosphere side. This allows the circumferentially enclosed cooling water tank to effectively cool the medium side. The overall layout is compact, ingenious, and reasonable, reducing or even avoiding the influence of temperature on the sealing components. This greatly ensures and improves the stable and reliable use of the dynamic and static ring sealing assembly, and is especially suitable for high-temperature environments above 200°C. The present invention also includes the following advantages: By setting the purge port on the stationary ring seat, the dynamic and stationary ring sealing components can be purged through the air intake of the purge port, effectively removing condensate that may be generated due to temperature difference, and helping to ensure the normal use of the dynamic and stationary ring sealing components. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0019] Figure 3 for Figure 1 A magnified view of a section at point B.

[0020] The components include: 1. Cooling water tank; 2. Sealing housing; 3. Stationary ring seat; 4. Clamping assembly; 5. Bushing; 6. Elastic element; 7. Atmospheric side dynamic and stationary ring sealing assembly; 8. Medium side dynamic and stationary ring sealing assembly; 9. Collection tank; 10. Shaft component; 100. Cooling water inlet / outlet; 200. Sealing gas inlet / outlet; 300. Purge port; 400. Collection hole; 101. Cooling water outlet; 102. Cooling water inlet; 11. Water tank body; 12. Tank base; 13. Baffle; 14. Lower cavity; 21. Sealing component one; 30. Positioning plate; 31. Upper cavity; 41. Clamp the upper ring; 42. Clamp the lower ring; 43. Bolt; 44. Snap ring; 50. Pin; 51. Recessed structure; 52. Radial Gladge ring; 53. Receiving cavity; 54. Seal II; 55. End Gladge ring; 56. Flange; 57. Raised ring portion; 71. Atmospheric side moving ring; 72. Atmospheric side retaining element; 73. Atmospheric side stationary ring; 74. Atmospheric side sealing ring one; 75. Atmospheric side push ring; 76. Atmospheric side sealing ring two; 81. Medium-side moving ring; 82. Medium-side retaining ring; 83. Medium-side stationary ring; 84. Medium-side sealing ring one; 85. Medium-side push ring; 86. Medium-side sealing ring two; 90. Sealing component three. Detailed Implementation

[0021] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0022] like Figure 1 As shown, the high-temperature double-end stirring dry gas sealing device of this embodiment includes a shaft 10, a bushing 5 fixedly sealed on the shaft 10, and a cooling water tank 1 spaced out on the shaft 10 located on the outer side of the bushing 5 facing the medium side; a stationary ring seat 3 is fitted on the outer side of the bushing 5, and a sealing box 2 is installed between the stationary ring seat 3 and the cooling water tank 1, and a dynamic and static ring sealing assembly is installed on the bushing 5 located inside the sealing box 2; a cavity surrounding the shaft 10 is provided inside the cooling water tank 1, and a cooling water inlet and outlet 100 communicating with the cavity is provided on the cooling water tank 1.

[0023] In this embodiment, along the axial direction from the medium side to the atmosphere side, a cooling water tank 1 and a dynamic and static ring sealing assembly are sequentially sleeved on the shaft 10, so that the medium side can be effectively cooled by the circumferentially enclosed cooling water tank 1, reducing or even avoiding the influence of temperature on the sealing components.

[0024] In actual use, air is introduced into the sealing housing 2, which drives the static ring and dynamic ring in the dynamic and static ring sealing assembly to separate. Thus, the air introduced into the sealing housing 2, combined with the dynamic and static ring sealing assembly, achieves the sealing between the rotating shaft 10 and the stationary cooling water tank 1, the sealing housing 2, and the static ring seat 3.

[0025] In one embodiment, sealing elements 21 are press-fitted between the two end faces of the sealing housing 2 in the axial direction and the cooling water tank 1 and the stationary ring seat 3, respectively. Long bolts are locked through the stationary ring seat 3 and the sealing housing 2 toward the cooling water tank 1 to achieve sealing and fixed installation between the cooling water tank 1, the sealing housing 2 and the stationary ring seat 3. The end face of the stationary ring seat 3 is equipped with a positioning piece 30 that is snapped onto the bushing 5 to limit the position of the bushing 5 in the axial direction.

[0026] In actual use, the cooling water tank 1 cavity forms a cooling water circulation flow through the cooling water inlet and outlet 100, achieving and ensuring effective and reliable cooling from the circumferential direction.

[0027] like Figure 2As shown, a partition 13 is provided in the cavity of the cooling water tank 1, which divides the cavity into a communicating inner cavity and an outer cavity. The cooling water inlet and outlet 100 includes a cooling water inlet 102 communicating with the inner cavity and a cooling water outlet 101 communicating with the outer cavity. The inner cavity is located on the inner side of the outer cavity facing the shaft 10. This allows the cooler liquid entering from the cooling water inlet 102 to flow in the inner cavity, ensuring effective and reliable cooling temperature for the shaft 10, bushing 5, and dynamic and static ring sealing assembly located near the inner cavity.

[0028] The partition 13 facing the medium side has a gap between its end and the inner wall of the cavity so that the inner and outer cavities are connected. The partition 13 facing away from the medium side is connected to the inner wall of the cavity. While realizing the connection between the inner and outer cavities and ensuring the flow and circulation of cooling water in the cooling water tank 1 cavity, the cooling water inlet 102 with a lower temperature is arranged close to the bushing 5.

[0029] The cooling water tank 1 includes a water tank body 11 circumferentially arranged around the shaft 10, and a cavity is formed on the end face of the water tank body 11 along the circumferential direction; it also includes a tank seat 12 fitted on the end face of the water tank body 11, and the tank seat 12 closes and seals the cavity. For example, the water tank body 11 and the tank seat 12 are fixed together by welding to form the cooling water tank 1.

[0030] A collection groove 9 is installed on the inner side of the end face of the cooling water tank 1 facing away from the medium, forming a collection cavity with its opening facing the bushing 5; such as Figure 3 As shown, the end face of the bushing 5 located inside the dynamic and static ring sealing assembly extends with a flange 56. The flange 56 extends outward to the circumference of the collection groove 9, and the flange 56 is directly opposite the opening of the collection cavity. The cooling water tank 1 is provided with a collection hole 400 communicating with the collection cavity. The collection hole 400 is normally closed.

[0031] In practical use, the sealing device is usually used for several years. Under special circumstances, the dynamic ring and static ring in the dynamic and static ring sealing assembly may come into contact or wear. By setting the collection groove 9, the worn powder can be collected in the collection chamber to reduce or even avoid the powder from affecting other parts of the sealing device. The powder in the collection chamber can be removed through the collection hole 400.

[0032] In this embodiment, the collection tank 9 has an L-shaped annular structure, and the vertical walls of the annular structure are arranged at intervals toward the shaft 10. The L-shaped opening and the cooling water tank 1 form a collection cavity with the opening facing the bushing 5. A sealing element 90 is also press-fitted between the collection tank 9 and the cooling water tank 1.

[0033] By setting the flange 56 on the end face of the bushing 5, the flange 56 extends into the opening of the collection chamber, so that the powder will smoothly enter the collection chamber along the flange 56, and cannot cross the flange 56 and the collection groove 9 to enter the medium side.

[0034] The dynamic and static ring sealing assembly includes an atmospheric side dynamic and static ring sealing assembly 7 and a medium side dynamic and static ring sealing assembly 8. The dynamic rings in the two sets of dynamic and static ring sealing assemblies are installed opposite to each other on the bushing 5 and rotate with the bushing 5. The static rings in the two sets of dynamic and static ring sealing assemblies are respectively opposite to the corresponding dynamic rings and are installed in the static ring seat 3 and the cooling water tank 1, respectively, realizing double-end face sealing on the medium side and the medium side.

[0035] In this embodiment, the rotating and stationary rings that are fitted together in the rotating and stationary ring sealing assembly can be set up with reference to existing common rotating and stationary rings. For example, the rotating ring is made of high-hardness hard alloy, silicon carbide or other materials, and the stationary ring is made of graphite, silicon carbide or other materials with good self-lubricating properties and low coefficient of friction. The end face of the rotating ring facing the stationary ring is opened with a spiral groove or other slot, which can enable the normal use of the rotating and stationary ring sealing assembly.

[0036] The stationary ring seat 3 is provided with a purge port 300, which is connected to the inner side of the dynamic and stationary ring sealing assembly 7 on the atmospheric side through the gap between the inner circumferential surface of the stationary ring seat 3 and the bushing 5; the purge port 300 is connected to an external air source and air enters into the gap between the inner side of the stationary ring seat 3 and the bushing 5.

[0037] In this embodiment, by setting the purge port 300 on the stationary ring seat 3, the dynamic and stationary ring sealing assembly can be purged through the air intake of the purge port 300, effectively removing condensate that may be generated due to temperature difference, and helping to ensure the normal use of the dynamic and stationary ring sealing assembly.

[0038] The bushing 5 extends circumferentially to form a convex ring 57. The two end faces of the convex ring 57 are provided with receiving cavities 53 facing away from each other, and the moving ring is housed in the receiving cavity 53. The end face of the moving ring and the bottom surface of the receiving cavity 53 are press-fitted with end glyphs 55, and the moving ring pin 50 is fixed relative to the bushing 5 in the circumferential direction. This enables reliable installation and arrangement of the two sets of moving and stationary ring sealing assemblies relative to the ends of the bushing 5, and the moving ring in the two sets of moving and stationary ring sealing assemblies can be driven to rotate synchronously by the bushing 5.

[0039] In this embodiment, a glyph 55 is press-fitted between the end face of the rotating ring and the bottom surface of the accommodating cavity 53, and a second sealing ring is press-fitted between the outer circumferential surface of the rotating ring and the circumferential wall surface of the accommodating cavity 53, so that the pin 50 installed between the rotating ring and the bushing 5 is located between the second sealing ring and the glyph 55, which reliably protects the pin 50 and ensures the performance of the pin 50.

[0040] In this embodiment, a radial glyph 52 is installed between the inner side of the bushing 5 located at the convex ring portion 57 and the shaft 10. By setting the radial glyph 52 and the end glyph 55, the use of ordinary sealing rings is replaced, which helps to ensure sealing performance and extend service life.

[0041] The stationary ring seat 3 has an upper cavity 31 for equipping the stationary ring, and the cooling water tank 1 has a lower cavity 14 for equipping another stationary ring. The end of the stationary ring extending into the upper cavity 31 or the lower cavity 14 is equipped with a sealing ring, a push ring, and an elastic element 6. The elastic element 6 drives the stationary ring to conform to the moving ring via the push ring. When air enters the sealing box 2, the sealing air will overcome the elastic force of the elastic element 6 and drive the stationary ring to detach from the moving ring. It also includes a retaining element, which restricts the displacement of the stationary ring away from the elastic element 6. The retaining element effectively prevents the stationary ring from detaching from the upper cavity 31 or the lower cavity 14.

[0042] exist Figure 3 In the embodiment shown, the atmospheric side dynamic and static ring sealing assembly 7 includes: an atmospheric side dynamic ring 71 fitted into the housing cavity 53 of the bushing 5 via a pin 50, an atmospheric side sealing ring 2 76, and an end Glyd ring 55; an atmospheric side static ring 73 fitted onto the atmospheric side end face of the atmospheric side dynamic ring 71; the atmospheric side static ring 73 extending into the upper cavity 31 of the static ring seat 3; an atmospheric side push ring 75 fitted onto the end face of the atmospheric side static ring 73 extending into the upper cavity 31 via an atmospheric side sealing ring 1 74; an elastic element 6 installed between the atmospheric side push ring 75 and the upper cavity 31; and an atmospheric side retainer 72 installed at the opening of the upper cavity 31 facing the atmospheric side static ring 73.

[0043] exist Figure 3 In the embodiment shown, the medium-side dynamic and static ring sealing assembly 8 includes: a medium-side dynamic ring 81 fitted into the housing cavity 53 of the bushing 5 via a pin 50, a second medium-side sealing ring 86, and an end Glyd ring 55; a medium-side static ring 83 fitted onto the end face of the medium-side dynamic ring 81 facing the medium side; the medium-side static ring 83 extending into the lower cavity 14 of the cooling water tank 1; a medium-side push ring 85 fitted onto the end face of the medium-side static ring 83 extending into the lower cavity 14 via a first medium-side sealing ring 84; an elastic element 6 installed between the medium-side push ring 85 and the lower cavity 14; and a medium-side retainer 82 installed at the opening of the lower cavity 14 facing the medium-side static ring 83.

[0044] In this embodiment, the inner wall surface of the bushing 5 facing the shaft 10 is recessed to form a concave structure 51. The inner wall surface of the bushing 5 located outside the two axial ends of the concave structure 51 is in close contact with the shaft 10. Sealing rings are respectively embedded on the wall surfaces of the bushing 5 at both ends that are in close contact with the shaft 10, thereby effectively ensuring the sealing of their contact surfaces while reducing the contact area between the bushing 5 and the shaft 10.

[0045] In this embodiment, sealing grooves can be opened at both ends of the bushing 5 and the shaft 10, and radial glyphs 52 and sealing element 54 can be installed in the sealing grooves to ensure the sealing of the contact surface between the bushing 5 and the shaft 10.

[0046] The sealed housing 2 is provided with a sealing gas inlet and outlet 200. The inlet of the sealing gas inlet and outlet 200 allows air to enter the sealed housing 2, causing the stationary ring to move axially and separate from the moving ring. The outlet of the sealing gas inlet and outlet 200 leads the gas in the sealed housing 2 to the external exhaust gas collection system. The inlet and outlet of the sealing gas inlet and outlet 200 are located at both ends of the same diameter direction of the sealed housing 2.

[0047] In practical use, the air intake of the sealing gas inlet and outlet 200 precedes that of the purge port 300. The air intake of the sealing gas inlet and purge port 300 flows out through the sealing gas outlet. The sealing gas outlet is connected to the external exhaust gas collection system. According to actual needs, flow meters, pressure gauges, needle valves, etc. can be installed at the sealing ring outlet to monitor the gas at the sealing ring outlet.

[0048] In this embodiment, both the sealing gas and the purging gas can be dry and clean nitrogen. Of course, other inert gases that meet the requirements can also be used.

[0049] In this embodiment, the end of the bushing 5 located on the atmospheric side is fixedly installed on the shaft 10 via the clamping assembly 4.

[0050] exist Figure 1 In the illustrated embodiment, the clamping assembly 4 includes an upper clamping ring 41 fitted onto the shaft 10 and a lower clamping ring 42 fitted onto the bushing 5. The inner edge of the upper clamping ring 41 extends along the shaft 10 into the inner side of the bushing 5. A second seal 54 is pressed between the shaft 10 and the bushing 5 at the inner edge end of the upper clamping ring 41. A fastener is radially locked onto the upper clamping ring 41, with its inner end pressed against the side of the shaft 10. Another fastener is radially locked onto the lower clamping ring 42, with its inner end pressed against the side of the bushing 5. The outer wall of the bushing 5 is axially limited and fixed to the lower clamping ring 42 via a stepped retaining ring 44. The assembly also includes a bolt 43 that passes through the upper clamping ring 41 and is locked toward the lower clamping ring 42, thereby achieving a fastening fit between the atmospheric side bushing 5 and the shaft 10 by the clamping assembly 4.

[0051] This invention features a compact, ingenious, and reasonable layout, reducing or even eliminating the impact of temperature on sealing components, greatly ensuring and improving the stable and reliable use of dynamic and static ring sealing assemblies, and is especially suitable for high-temperature environments above 200°C.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A high-temperature double-end-face stirring dry gas sealing device, comprising a shaft (10), characterized in that: A bushing (5) is fixedly sealed on the shaft (10), and a cooling water tank (1) is spaced on the shaft (10) located outside the end of the bushing (5) facing the medium side; a stationary ring seat (3) is fitted on the outside of the bushing (5), and a sealing box (2) is installed between the stationary ring seat (3) and the cooling water tank (1); a dynamic and static ring sealing assembly is installed on the bushing (5) located inside the sealing box (2); a cavity surrounding the shaft (10) is provided inside the cooling water tank (1), and a cooling water inlet and outlet (100) communicating with the cavity is provided on the cooling water tank (1).

2. The high-temperature double-end-face stirring dry gas sealing device as described in claim 1, characterized in that: The cooling water tank (1) is provided with a partition (13) in its cavity, which divides the cavity into an inner cavity and an outer cavity that are in communication. The cooling water inlet and outlet (100) includes a cooling water inlet (102) connected to the inner cavity and a cooling water outlet (101) connected to the outer cavity. The inner cavity is located on the inner side of the outer cavity facing the shaft (10).

3. The high-temperature double-end-face stirring dry gas sealing device as described in claim 2, characterized in that: The end of the partition (13) facing the medium side is provided with a gap between it and the inner wall of the cavity so that the inner cavity and the outer cavity are connected, and the end of the partition (13) facing away from the medium side is connected to the inner wall of the cavity.

4. The high-temperature double-end-face stirring dry gas sealing device as described in claim 1 or 2, characterized in that: The cooling water tank (1) includes a water tank body (11) circumferentially arranged around the shaft (10), and a cavity is provided on the end face of the water tank body (11) along the circumferential direction; it also includes a tank seat (12) fitted on the end face of the water tank body (11), and the tank seat (12) closes the cavity.

5. The high-temperature double-end-face stirring dry gas sealing device as described in claim 1, characterized in that: A collection groove (9) is installed on the inner side of the end face of the cooling water tank (1) facing away from the medium, forming a collection cavity with the opening facing the bushing (5); a flange (56) extends from the end face of the bushing (5) located inside the dynamic and static ring sealing assembly, and the flange (56) extends to the outer circumference of the collection groove (9), with the flange (56) facing the opening of the collection cavity; a collection hole (400) communicating with the collection cavity is provided on the cooling water tank (1); the collection hole (400) is normally closed.

6. The high-temperature double-end-face stirring dry gas sealing device as described in claim 1, characterized in that: The dynamic and static ring sealing assembly includes an atmospheric side dynamic and static ring sealing assembly (7) and a medium side dynamic and static ring sealing assembly (8). The dynamic rings in the two sets of dynamic and static ring sealing assemblies are installed opposite each other on the bushing (5) and rotate with the bushing (5). The static rings in the two sets of dynamic and static ring sealing assemblies are respectively opposite to the corresponding dynamic rings and are installed in the static ring seat (3) and the cooling water tank (1).

7. The high-temperature double-end-face stirring dry gas sealing device as described in claim 6, characterized in that: The stationary ring seat (3) is provided with a purge port (300), which is connected to the inner side of the dynamic and stationary ring sealing assembly (7) on the atmospheric side through the gap between the inner circumferential surface of the stationary ring seat (3) and the bushing (5); the purge port (300) is connected to an external air source and enters air into the gap between the inner side of the stationary ring seat (3) and the bushing (5).

8. The high-temperature double-end-face stirring dry gas sealing device as described in claim 6, characterized in that: The bushing (5) extends circumferentially to form a convex ring (57), and the two end faces of the convex ring (57) are provided with accommodating cavities (53) facing away from each other. The moving ring is accommodated in the accommodating cavity (53). The end face of the moving ring and the bottom surface of the accommodating cavity (53) are press-fitted with end glyphs (55), and the moving ring pin (50) is fixed relative to the bushing (5) in the circumferential direction.

9. The high-temperature double-end-face stirring dry gas sealing device as described in claim 6, characterized in that: The stationary ring seat (3) has an upper cavity (31) for equipping the stationary ring, and the cooling water tank (1) has a lower cavity (14) for equipping another stationary ring. The end of the stationary ring extending into the upper cavity (31) or the lower cavity (14) is equipped with a sealing ring, a push ring, and an elastic element (6). The elastic element (6) drives the stationary ring to conform to the moving ring via the push ring. It also includes a retaining element, which restricts the displacement of the stationary ring from the elastic element (6).

10. The high-temperature double-end-face stirring dry gas sealing device as described in claim 1, characterized in that: The sealed housing (2) is provided with a sealing gas inlet and outlet (200). The inlet of the sealing gas inlet and outlet (200) is used to allow air to enter the sealed housing (2), causing the stationary ring to move axially and separate from the moving ring. The outlet of the sealing gas inlet and outlet (200) leads the gas in the sealed housing (2) to the external exhaust gas collection system. The inlet and outlet of the sealing gas inlet and outlet (200) are located at both ends of the sealed housing (2) in the same diameter direction.

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