CN218326201U

CN218326201U - Sealing device for high-speed centrifuge

Info

Publication number: CN218326201U
Application number: CN202221694383.3U
Authority: CN
Inventors: 都森欣; 曹云鹏; 关键; 胡益军; 邹豪; 陆晶妮; 裘明权; 蔡昌莎
Original assignee: Lopland Machinery & Equipment Ningbo Co ltd
Current assignee: Lopland Machinery & Equipment Ningbo Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-01-17
Anticipated expiration: 2032-06-30

Abstract

The utility model provides a sealing device for a high-speed centrifuge, which comprises a shaft sleeve and a sealing flange, wherein two ends of an inner cavity of the sealing flange are respectively provided with a first mounting groove and a second mounting groove, a main sealing component is assembled between the outer wall of one end of the shaft sleeve and the first mounting groove, an auxiliary sealing component is assembled between the outer wall of the other end of the shaft sleeve and the second mounting groove, and the side wall of the sealing flange is provided with a liquid inlet communicated to the first mounting groove and a liquid outlet communicated to the second mounting groove; the inner wall of the sealing flange is also provided with a drainage sleeve extending along the axial direction of the sealing flange, two ends of the drainage sleeve respectively extend to the position of a main sealing surface of the main sealing assembly and the position of an auxiliary sealing surface of the auxiliary sealing assembly, and flushing channels are reserved between the inner wall of the drainage sleeve and the outer wall of the shaft sleeve and between the outer wall of the drainage sleeve and the inner walls of the main sealing assembly and the auxiliary sealing assembly. The utility model provides a sealing device for high-speed centrifuge can be applied to high rotational speed's operating mode to sealing performance is stable, long service life.

Description

Sealing device for high-speed centrifuge

Technical Field

The utility model belongs to the technical field of the mechanical seal technique and specifically relates to a sealing device for high-speed centrifuge.

Background

Centrifuges are machines that utilize centrifugal force to separate components of a mixture of liquid and solid particles or liquid and liquid. Centrifuges are used primarily to separate solid particles from a liquid in a suspension, or to separate two liquids in an emulsion that are of different densities and are immiscible with each other (e.g., to separate cream from milk). The centrifugal machine is widely applied to chemical, petroleum, food, pharmacy, ore dressing, coal, water treatment, ships and other departments.

The traditional centrifuge generally adopts lip seal or traditional mechanical seal, the lip seal has a sanitary corner, the service life is short, the leakage risk is large, and the mechanical seal has the advantages of simple structure, mature technology and low requirement on processing precision; however, the rotating speed of the equipment corresponding to the traditional mechanical seal is limited, generally exceeds 2000 revolutions, the traditional mechanical seal is easy to wear and cause leakage, and especially for the sanitary centrifuge of 5000-12000 revolutions, the traditional mechanical seal can not meet the requirements of working conditions. In addition, when the transfer of the centrifuge reaches 5000 to 12000 revolutions, there is also a case where the medium side is almost in a gas state, and in this case, the conventional mechanical seal tends to fail early due to unstable liquid film state of the sealing surface of the dynamic and static rings.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem, in order to overcome the defect among the prior art, provide a sealing device for high-speed centrifuge, can be applied to high rotational speed operating mode to sealing performance is stable, long service life.

In order to solve the problems, the utility model provides a sealing device for a high-speed centrifuge, which comprises a shaft sleeve and a sealing flange sleeved outside the shaft sleeve, wherein both ends of an inner cavity of the sealing flange are respectively provided with a first mounting groove and a second mounting groove, a main sealing assembly is arranged between the outer wall of one end of the shaft sleeve and the first mounting groove, an auxiliary sealing assembly is arranged between the outer wall of the other end of the shaft sleeve and the second mounting groove, and the side wall of the sealing flange is provided with a liquid inlet communicated with the first mounting groove and a liquid outlet communicated with the second mounting groove; and the inner wall of the sealing flange is also provided with a drainage sleeve extending along the axial direction of the sealing flange, two ends of the drainage sleeve respectively extend to the position of a main sealing surface of the main sealing assembly and the position of an auxiliary sealing surface of the auxiliary sealing assembly, and flushing channels are reserved between the inner wall of the drainage sleeve and the outer wall of the shaft sleeve and between the outer wall of the drainage sleeve and the inner walls of the main sealing assembly and the auxiliary sealing assembly.

Compared with the prior art, the sealing device of the utility model has the following advantages:

the sealing device of the utility model is double-end-face sealing, effectively realizes the sealing of the medium end and the atmosphere end, and is matched with a flushing system to flush and cool the sealing surface, and has better sealing performance and service life compared with single-end-face sealing; and be provided with the drainage cover in sealed chamber for the flush fluid that gets into main sealed one end drains to vice sealed face place position fast, guarantees under the circumstances that main sealed face has abundant liquid film, also can let the sealed abundant lubrication of second grade, makes the reliability of machine seal work strengthen greatly, has prolonged the life of machine seal.

As an improvement, the sealing device also comprises a sealing gland, wherein the sealing gland is sleeved outside the shaft sleeve and is axially connected with the sealing flange; the auxiliary sealing assembly is provided with a flow guide part, the inner wall of the sealing gland is provided with a collecting groove, and the flow guide part is used for guiding the medium leaked out of the auxiliary sealing surface to the collecting groove; and the outer wall of the sealing gland is provided with a collecting hole communicated to the collecting tank. In the above-mentioned improvement structure, the setting of water conservancy diversion portion and collecting vat, collection hole makes the material that vice sealed face leaked out can flow to the atmosphere side, and the condition of edge axle sleeve axial blowout leakage can not appear.

In another improvement, the main sealing assembly comprises a driving ring and a main stationary ring, a third mounting groove is formed in the outer wall of one end of the shaft sleeve, one end of the driving ring is mounted in the third mounting groove, one end of the main stationary ring is slidably mounted in the first mounting groove, and the other end of the main stationary ring is abutted against the other end of the driving ring in a circumferential direction in a relatively rotatable manner to form the main sealing surface; and a first elastic compensation component is arranged between the bottom of the first mounting groove and the main static ring. In the improved structure, the main sealing assembly adopts a movable ring compensation mode, and the driving ring rotates all the time, so that a large amount of impurities can be effectively prevented from being accumulated in the compensation element, the compensation performance is stable, and the sealing performance is stable.

In another improvement, the first elastic compensation assembly includes a plurality of first springs and a plurality of first T-shaped guide pins, a plurality of first spring holes distributed along the circumferential direction are formed in the bottom of the first mounting groove, one end of each first spring abuts against the bottom of each first spring hole, a vertical portion of each first T-shaped guide pin is inserted into the other end of each first spring in a sliding manner, and a horizontal portion of each first T-shaped guide pin abuts against the tail end of the main stationary ring. In the improved structure, the elastic compensation part is formed by adopting a plurality of circumferentially arranged springs, the compensation force is stable, and the first T-shaped guide pin is inserted in each first spring, so that the stability of each first spring during compression is ensured, the first spring cannot deflect, and the stability of the elastic force is ensured.

The auxiliary sealing assembly comprises an auxiliary movable ring, an auxiliary movable ring seat and an auxiliary static ring, wherein the auxiliary movable ring seat is connected to the outer wall of the shaft sleeve, an auxiliary movable ring groove is formed in one end of the auxiliary movable ring seat, one end of the auxiliary movable ring is assembled in the auxiliary movable ring groove, one end of the auxiliary static ring is assembled in the second installation groove in a sliding mode, and the other end of the auxiliary static ring is abutted with the other end of the auxiliary movable ring in a circumferential direction in a relatively rotatable mode to form an auxiliary sealing surface; and a second elastic compensation component is arranged between the bottom of the second mounting groove and the auxiliary stationary ring. In the improved structure, the auxiliary sealing assembly also adopts a movable ring compensation mode, and the driving ring rotates all the time, so that a large amount of impurities can be effectively prevented from being accumulated in the compensation element, the compensation performance is stable, and the sealing performance is stable.

And in another improvement, the first elastic compensation assembly comprises a plurality of second springs and a plurality of second T-shaped guide pins, a plurality of second spring holes distributed along the circumferential direction are formed in the bottom of the second mounting groove, one end of each second spring abuts against the bottom of each second spring hole, a vertical part of each second T-shaped guide pin is inserted into the other end of each second spring in a sliding manner, and a horizontal part of each second T-shaped guide pin abuts against the tail end of the auxiliary stationary ring.

In a further improvement, a plurality of set screws penetrate through the circumferential outer wall of the auxiliary moving ring seat, and the auxiliary moving ring seat is in transmission connection with the shaft sleeve through the set screws; and a plurality of avoidance through holes which are in one-to-one correspondence with the fastening screws are arranged on the circumferential outer wall of the sealing gland. In the above-mentioned improvement structure, the holding screw setting is in order to make axle sleeve and centrifuge's pivot realize the transmission and be connected to in order to conveniently operate the holding screw, seted up corresponding dodge the through-hole on the gland lateral wall.

In another improvement, a positioning sleeve is arranged on the radial outer side of the auxiliary movable ring seat, and the open end of the positioning sleeve is rotatably inserted into the collecting tank along the circumferential direction; the other end of the positioning sleeve is provided with an inclined plane which is high along the radial direction. In the above-mentioned improvement structure, carry out special design through the structure to vice rotating ring seat, realized the drainage structure between vice sealed face and the collection groove.

Drawings

Fig. 1 is a schematic structural view of a sealing device for a high-speed centrifuge according to the present invention;

fig. 2 is another angle structure diagram of the sealing device for the high-speed centrifuge of the present invention;

FIG. 3 is a schematic half-sectional view of a sealing device for the high-speed centrifuge of FIG. 1;

FIG. 4 is another schematic angle half-section of the sealing device for the high-speed centrifuge of FIG. 1;

FIG. 5 is a partial cross-sectional view of another angle of the sealing device for a high-speed centrifuge according to the present invention;

FIG. 6 is a partial cross-sectional view of another angle of the sealing device for a high-speed centrifuge according to the present invention;

fig. 7 is a partial cross-sectional view of another angle of the sealing device for a high-speed centrifuge according to the present invention.

Description of the reference numerals:

1. a shaft sleeve; 1.1, a third mounting groove; 2. sealing the flange; 2.1, a first mounting groove; 2.2, a second mounting groove; 2.3, liquid inlet holes; 2.4, liquid outlet holes; 3. a drainage sleeve; 4. a sealing gland; 4.1, a collecting tank; 4.2, collecting holes; 4.3, avoiding the through hole; 5. a driving ring; 6. a main stationary ring; 7. a first spring; 8. a first spring hole; 9. a first T-shaped guide pin; 10. an auxiliary movable ring; 11. an auxiliary movable ring seat; 11.1, an auxiliary movable ring groove; 12. a secondary stationary ring; 13. a second spring; 14. a second T-shaped guide pin; 15. a second spring hole; 16. tightening the screw; 17. a positioning sleeve; 18. and (7) a plug.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it should be noted that the terms "upper end", "outer side wall", "inner wall", "lower end", "horizontal", "vertical", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, the terms "first" and "second" are used for convenience of description and distinction, and have no specific meaning.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, the utility model provides a sealing device for a high-speed centrifuge, which comprises a sleeve 1 sleeved outside a rotating shaft of the centrifuge and rotating synchronously with the rotating shaft, a sealing flange 2 is sleeved outside the sleeve 1, and the sealing flange 2 is used for being fixedly connected with an installation cavity of the centrifuge during installation; in addition, a first mounting groove 2.1 and a second mounting groove 2.2 are respectively arranged at two ends of an inner cavity of the sealing flange 2, a main sealing assembly is assembled between the outer wall of one end of the shaft sleeve 1 and the first mounting groove 2.1, an auxiliary sealing assembly is assembled between the outer wall of the other end of the shaft sleeve 1 and the second mounting groove 2.2, and a liquid inlet hole 2.3 communicated to the first mounting groove 2.1 and a liquid outlet hole 2.4 communicated to the second mounting groove 2.2 are arranged on the side wall of the sealing flange 2; on the other hand, the inner wall of the sealing flange 2 is also provided with a drainage sleeve 3 extending along the axial direction, two ends of the drainage sleeve 3 respectively extend to the main sealing surface position of the main sealing assembly and the auxiliary sealing surface position of the auxiliary sealing assembly, and flushing channels are reserved between the inner wall of the drainage sleeve 3 and the outer wall of the shaft sleeve 1 and between the outer wall of the drainage sleeve 3 and the inner walls of the main sealing assembly and the auxiliary sealing assembly. As shown in fig. 1 and 3, the sealing device in this embodiment is assembled with the centrifuge chamber in a bottom-in type installation manner; in the structure, as shown in the figure, when flushing liquid enters from a liquid inlet hole 2.1 on the sealing flange 2 and then reaches the position of the main sealing surface through a channel between the first mounting groove 2.1 and the outside of the drainage sleeve 3, the main sealing surface is cooled and flushed, and under the action of the flushing liquid, a liquid film can be formed on the main sealing surface even if the medium at the outer end of the main sealing assembly is gas, so that the dynamic sealing effect is realized; and under the effect of this drainage cover 3, the flush fluid continues to flow through the passageway before 3 inner walls of drainage cover and the axle sleeve 1 outer wall, down flows to vice sealed face position, washes, cools off vice sealed face, also can form effective liquid film on making vice sealed face, guarantees sealing performance, makes the reliability of machine seal work strengthen greatly, has prolonged the life of machine seal. In addition, because the thickness of the drainage sleeve 3 is relatively small, in order to facilitate processing and installation, in the embodiment, the drainage sleeve 3 is divided into two sections, and the two sections of drainage sleeves 3 are respectively assembled on the inner wall of the sealing flange 2 along the directions from top to bottom and from bottom to top.

The parts of the shaft sleeve 1, which are contacted with the medium, are all subjected to electrolytic polishing, the smoothness is high, the inclination angles of the shaft sleeve and the medium contact part are designed, the medium cannot be remained on the metal surface, the generation of microorganisms and bacteria is avoided, and the requirement of sanitary design is met.

On the other hand, the sealing device in the embodiment further comprises a sealing gland 4, wherein the sealing gland 4 is sleeved outside the shaft sleeve 1 and is axially connected with the sealing flange 2; the auxiliary sealing assembly is provided with a flow guide part 5, the inner wall of the sealing gland 4 is provided with a collecting tank 4.1, and the flow guide part 5 is used for guiding liquid leaked from the auxiliary sealing surface to the collecting tank 4.1; and, be equipped with the collection hole 4.2 that communicates to collecting vat 4.1 on seal gland 4's outer wall, this structure has realized that the material that reveals the vice sealed face drains to the atmosphere side, and the condition that axial direct leakage spout can not appear.

The structures of the primary seal assembly and the secondary seal assembly in this embodiment are described in detail below:

as shown in fig. 3, the main sealing assembly includes a driving ring 5 and a main stationary ring 6, the outer wall of the upper end of the shaft sleeve 1 is provided with an installation boss, the lower end surface of the installation boss is provided with a recessed third installation groove 1.1, the upper end of the driving ring 5 is hermetically assembled in the third installation groove 1.1, the lower end of the main stationary ring 6 is slidably assembled in the first installation groove 2.1, and the upper end of the main stationary ring 6 is abutted against the lower end of the driving ring 5 in a circumferential direction so as to form the main sealing surface; and be equipped with first elastic compensation subassembly between first mounting groove 2.1 bottom and main quiet ring 6 for carry out timely axial compensation to the wearing and tearing volume of main sealed face, guarantee that the terminal surface of driving ring 5 and main quiet ring 6 is sealed laminating all the time, guarantee sealing performance's stability. In this structure, as shown in fig. 6, the first elastic compensation assembly includes a plurality of first springs 7 and a plurality of first T-shaped guide pins 9, a plurality of first spring holes 8 distributed along the circumferential direction are formed at the bottom of the first mounting groove 2.1, the lower end of each first spring 7 abuts against the bottom of each first spring hole 8, the vertical portion (lower end) of each first T-shaped guide pin 9 is slidably inserted into the inside of the other end of the first spring 7, the upper end of each first spring 7 abuts against the lower end surface of the horizontal portion of the first T-shaped guide pin 9, and the upper end surface of the horizontal portion of the first T-shaped guide pin 9 abuts against the tail end (lower end surface) of the driving ring 5.

In addition, the auxiliary sealing assembly comprises an auxiliary movable ring 10, an auxiliary movable ring seat 11 and an auxiliary stationary ring 12, the auxiliary movable ring seat 11 is connected to the outer wall of the shaft sleeve 1, specifically, a plurality of set screws 16 penetrate through the circumferential outer wall of the auxiliary movable ring seat 11, and the auxiliary movable ring seat 11 is in transmission connection with the shaft sleeve 1 through the set screws 16; a plurality of avoidance through holes 4.3 corresponding to the set screws 16 one by one are arranged on the circumferential outer wall of the sealing gland 4; as shown in fig. 4 and 5, after the mechanical seal is installed in the centrifuge chamber, the set screw 16 needs to be further screwed to drive the end portion of the set screw to be tightly connected with the outside of the rotating shaft, so that the shaft sleeve 1 is in transmission connection with the rotating shaft; the arrangement of the escape through-holes 4.3 in this configuration can thus be used for the insertion of an operating tool for the screwing of the set screw 16, and a plug 18 is fitted at the outer end of each escape through-hole 4.3.

On the other hand, as shown in fig. 3, an auxiliary moving ring groove 11.1 is arranged at the upper end of the auxiliary moving ring seat 11, the lower end of the auxiliary moving ring 10 is hermetically assembled in the auxiliary moving ring groove 11.1, the upper end of the auxiliary stationary ring 12 is slidably assembled in the second installation groove 2.2, and the lower end of the auxiliary stationary ring 12 is abutted with the upper end of the auxiliary moving ring 10 in a circumferential direction in a relatively rotatable manner to form an auxiliary sealing surface; and a second elastic compensation component is arranged between the bottom of the second mounting groove 2.2 and the auxiliary static ring 12, and also is used for realizing the compensation of the abrasion loss of the auxiliary sealing surface.

As shown in fig. 7, the first elastic compensation assembly includes a plurality of second springs 13 and a plurality of second T-shaped guide pins 14, a plurality of second spring holes 15 distributed along the circumferential direction are formed at the bottom of the second mounting groove 2.2, the upper end of each second spring 13 abuts against the bottom of each second spring hole 15, and the vertical portion (upper end) of each second T-shaped guide pin 14 is slidably inserted into the inside of the other end of each second spring 13 until the lower end of each second spring 13 abuts against the horizontal portion of each second T-shaped guide pin 14 and the tail end of the secondary stationary ring 12.

In addition, in this embodiment, a positioning sleeve 17 is arranged on the radial outer side of the auxiliary movable ring seat 11, and an open end of the positioning sleeve 17 is circumferentially and rotatably inserted into the collecting tank 4.1; the other end of the positioning sleeve 17 is provided with an inclined surface 17.1 which is high in the radial direction and low outside, as shown in fig. 3; this inclined surface serves for guiding the medium escaping from the secondary sealing surface to the collecting groove 4.1, i.e. the aforementioned flow guide. Specifically, the positioning sleeve 17 and the auxiliary movable ring seat 11 are of an integral structure.

On the other hand, in order to facilitate the installation and maintenance and disassembly of the sealing device, in the structure, the shaft sleeve 1, the sealing flange 2, the main sealing assembly, the auxiliary sealing assembly and the sealing gland 4 are assembled into an integral structure in advance before being installed in the cavity of the centrifuge, so that the assembly is easy to assemble on equipment, the assembly quality is ensured, and the sealing surface is protected from being polluted by sundries or damaged due to misoperation before being installed or started.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present disclosure.

Claims

1. A sealing device for a high-speed centrifuge is characterized in that: the sealing device comprises a shaft sleeve (1) and a sealing flange (2) sleeved outside the shaft sleeve (1), wherein a first mounting groove (2.1) and a second mounting groove (2.2) are respectively arranged at two ends of an inner cavity of the sealing flange (2), a main sealing assembly is assembled between the outer wall of one end of the shaft sleeve (1) and the first mounting groove (2.1), an auxiliary sealing assembly is assembled between the outer wall of the other end of the shaft sleeve (1) and the second mounting groove (2.2), and a liquid inlet hole (2.3) communicated with the first mounting groove (2.1) and a liquid outlet hole (2.4) communicated with the second mounting groove (2.2) are formed in the side wall of the sealing flange (2); the inner wall of the sealing flange (2) is also provided with a drainage sleeve (3) extending along the axial direction of the sealing flange, two ends of the drainage sleeve (3) respectively extend to the position of a main sealing surface of the main sealing assembly and the position of an auxiliary sealing surface of the auxiliary sealing assembly, and flushing channels are reserved between the inner wall of the drainage sleeve (3) and the outer wall of the shaft sleeve (1) and between the outer wall of the drainage sleeve (3) and the inner walls of the main sealing assembly and the auxiliary sealing assembly.

2. The sealing device for a high-speed centrifuge according to claim 1, wherein: the sealing device is characterized by also comprising a sealing gland (4), wherein the sealing gland (4) is sleeved outside the shaft sleeve (1) and is axially connected with the sealing flange (2); the auxiliary sealing assembly is provided with a flow guide part, a collecting groove (4.1) is arranged on the inner wall of the sealing gland (4), and the flow guide part is used for guiding liquid leaked from the auxiliary sealing surface to the collecting groove (4.1); and a collecting hole (4.2) communicated to the collecting tank (4.1) is formed in the outer wall of the sealing gland (4).

3. The sealing device for a high-speed centrifuge according to claim 2, wherein: the main sealing assembly comprises a driving ring (5) and a main static ring (6), a third mounting groove (1.1) is formed in the outer wall of one end of the shaft sleeve (1), one end of the driving ring (5) is assembled in the third mounting groove (1.1), one end of the main static ring (6) is assembled in the first mounting groove (2.1) in a sliding mode, and the other end of the main static ring (6) is abutted with the other end of the driving ring (5) in a manner of being capable of rotating relatively in the circumferential direction to form a main sealing surface; a first elastic compensation component is arranged between the bottom of the first mounting groove (2.1) and the main static ring (6).

4. The sealing device for a high-speed centrifuge according to claim 3, wherein: the first elastic compensation assembly comprises a plurality of first springs (7) and a plurality of first T-shaped guide pins (9), a plurality of first spring holes (8) distributed along the circumferential direction are formed in the bottom of the first mounting groove (2.1), one end of each first spring (7) abuts against the bottom of each first spring hole (8), a vertical portion of each first T-shaped guide pin (9) is inserted into the other end of each first spring (7) in a sliding mode, and a horizontal portion of each first T-shaped guide pin (9) abuts against the tail end of the main static ring (6).

5. The sealing device for a high-speed centrifuge according to claim 3, wherein: the auxiliary sealing assembly comprises an auxiliary movable ring (10), an auxiliary movable ring seat (11) and an auxiliary static ring (12), wherein the auxiliary movable ring seat (11) is connected to the outer wall of the shaft sleeve (1), an auxiliary movable ring groove (11.1) is formed in one end of the auxiliary movable ring seat (11), one end of the auxiliary movable ring (10) is assembled in the auxiliary movable ring groove (11.1), one end of the auxiliary static ring (12) is assembled in the second installation groove (2.2) in a sliding mode, and the other end of the auxiliary static ring (12) is abutted to the other end of the auxiliary movable ring (10) in a circumferential direction in a relatively rotatable mode to form an auxiliary sealing surface; and a second elastic compensation component is arranged between the bottom of the second mounting groove (2.2) and the auxiliary static ring (12).

6. The sealing device for a high-speed centrifuge according to claim 5, wherein: the first elastic compensation assembly comprises a plurality of second springs (13) and a plurality of second T-shaped guide pins (14), a plurality of second spring holes (15) distributed along the circumferential direction are formed in the bottom of the second installation groove (2.2), one end of each second spring (13) abuts against the bottom of each second spring hole (15), the vertical portion of each second T-shaped guide pin (14) is inserted into the other end of each second spring (13) in a sliding mode, and the horizontal portion of each second T-shaped guide pin (14) abuts against the tail end of the auxiliary stationary ring (12).

7. The sealing device for a high-speed centrifuge according to claim 5, wherein: a plurality of set screws (16) penetrate through the circumferential outer wall of the auxiliary moving ring seat (11), and the auxiliary moving ring seat (11) is in transmission connection with the shaft sleeve (1) through the set screws (16); and a plurality of avoidance through holes (4.3) which are in one-to-one correspondence with the fastening screws (16) are arranged on the circumferential outer wall of the sealing gland (4).

8. The sealing device for a high-speed centrifuge according to claim 5, wherein: a positioning sleeve (17) is arranged on the radial outer side of the auxiliary movable ring seat (11), and the open end of the positioning sleeve (17) is rotatably inserted into the collecting tank (4.1) along the circumferential direction; the other end of the positioning sleeve (17) is provided with an inclined surface (17.1) which is high in the radial direction and low outside.