CN219639441U - Liquid film sealing device for carbon fiber pump - Google Patents

Abstract

The utility model discloses a liquid film sealing device for a carbon fiber pump, which comprises a shaft sleeve arranged on a rotating shaft and a sealing assembly arranged on the shaft sleeve, wherein an atmosphere side moving ring assembly and an atmosphere side static ring assembly in the sealing assembly form an atmosphere side seal, a medium side moving ring assembly and a medium side static ring assembly of the sealing assembly form a medium side seal, the atmosphere side seal is positioned at one end close to the atmosphere side, the medium side seal is positioned at one end close to the medium side, the atmosphere side seal and the medium seal are both sealed by adopting a liquid film, the shaft sleeve is provided with a notch close to the atmosphere side seal, sealing liquid of the sealing assembly is filled in the notch, and when the shaft sleeve rotates along with the rotating shaft, the notch can stir the sealing liquid.

Description

Liquid film sealing device for carbon fiber pump

Technical Field

The utility model relates to a liquid film sealing device, in particular to a liquid film sealing device for a carbon fiber pump.

Background

The carbon fiber pump is used as special conveying equipment, a base material of the carbon fiber pump is made of carbon fiber materials, a metal material of a conventional pump is replaced, the carbon fiber pump is commonly used for conveying a process medium with extremely strong corrosiveness, in reality, the carbon fiber pump is generally mechanically sealed, but the base material is made of carbon fiber materials, so that the abrasion resistance is relatively poor, the carbon fiber pump adopting liquid film sealing appears in the market at present, the abrasion loss degree of the carbon fiber pump is reduced by utilizing the non-contact sealing principle of the liquid film sealing, and the service life of the carbon fiber pump is prolonged to a certain extent.

However, the medium conveyed by the carbon fiber pump usually further contains solid particles, the sealing device is heated up sharply due to the intense movement and collision of the solid particles on the carbon fiber composite pump, so that the sealing pressure born by a liquid film of the sealing device is affected, the sealing performance of the whole carbon fiber pump is reduced, and meanwhile, the sealing surface is easily blocked by the solid particles, so that the sealing device of the carbon fiber pump is invalid.

In view of this, the present utility model has been made.

Disclosure of Invention

The utility model aims to provide a liquid film sealing device of a carbon fiber pump, which is a double-end-face integrated liquid film sealing device, and the liquid film sealing device is characterized in that a notch capable of leading in and out sealing liquid is arranged on a shaft sleeve sealed on the atmosphere side, the notch is driven to stir the sealing liquid in the rotating process of the shaft sleeve, so that the sealing liquid is circularly stirred, the atmosphere side sealing interface is ensured not to have deposited impurities, and meanwhile, heat generated by the sealing interface can be taken away through the sealing liquid in the stirring process, so that the problems of solid particle accumulation, easy blockage and influence on the sealing effect of the liquid film sealing due to overhigh heat are solved.

The embodiment of the utility model is realized by the following technical scheme: the sealing device comprises a shaft sleeve arranged on a rotating shaft and a sealing assembly arranged on the shaft sleeve, wherein an atmosphere side moving ring assembly and an atmosphere side static ring assembly in the sealing assembly form an atmosphere side seal, a medium side moving ring assembly and a medium side static ring assembly of the sealing assembly form a medium side seal, the atmosphere side seal is positioned at one end close to the atmosphere side, and the medium side seal is positioned at one end close to the medium side.

Preferably, an outer gland and a guide sleeve are arranged at one end, close to the medium side, of the atmosphere side static ring assembly, the outer gland is provided with a sealing liquid inlet and a sealing liquid outlet, the sealing liquid inlet and the sealing liquid outlet are arranged on the outer gland, and the guide sleeve is communicated with the sealing liquid inlet and the sealing liquid outlet and can guide the sealing liquid to the atmosphere side seal and the medium side seal.

Preferably, the media-side moving ring assembly comprises a media-side moving ring, and the sealing end surface of the media-side moving ring is provided with a plurality of groups of microscopic grooves which are uniformly circumferentially distributed.

Preferably, the sealing assembly is further provided with a positioning block.

Preferably, the atmosphere side moving ring assembly comprises an atmosphere side moving ring seat and an atmosphere side moving ring, the atmosphere side moving ring is arranged at one end of the atmosphere side moving ring seat, which is far away from the atmosphere side, in the axial direction, the side, which is close to the rotating shaft, of the positioning block can be radially fixed on the atmosphere side moving ring seat, the axial direction can be fixed on the outer pressing cover, and the side, which is far away from the rotating shaft, of the positioning block is provided with a radial spigot to be matched with the outer pressing cover.

Preferably, the notches are uniformly distributed U-shaped notches.

Preferably, the medium side static ring assembly comprises a medium side static ring, an inner gland is further arranged on one side, axially close to the medium, of the outer gland, one side, radially close to the rotating shaft, of the inner gland is connected with the medium side static ring, an O-shaped floating ring is arranged between the medium side static ring and the inner gland, and the O-shaped floating ring faces one side of the medium and is provided with a check ring.

Preferably, an internal pressure cap gasket is provided between the internal pressure cap and the device cavity.

Preferably, the atmosphere side static ring assembly comprises an atmosphere side static ring and an atmosphere side static ring seat, wherein the atmosphere side static ring is inlaid in the atmosphere side static ring seat, and the inlaid part is in interference fit.

Preferably, the medium side moving ring assembly comprises a medium side moving ring seat, a sealing groove is arranged on the end face of the medium side moving ring seat facing the medium end, and a moving ring seat sealing gasket is arranged in the sealing groove.

Compared with the prior art, the embodiment of the utility model has the following advantages and beneficial effects:

1. the liquid film sealing device of the carbon fiber pump is a double-end-face integrated liquid film sealing device, and the notch capable of leading in and out sealing liquid is arranged on the shaft sleeve sealed on the atmosphere side, so that the notch is driven to stir the sealing liquid in the rotating process of the shaft sleeve, the sealing liquid is circularly stirred, deposited impurities are not caused at the sealing interface on the atmosphere side, and meanwhile, heat generated at the sealing interface can be taken away through the sealing liquid in the stirring process, so that the problems that solid particles are accumulated, the sealing effect of the liquid film sealing is easily blocked and the heat is excessively high are solved;

2. the liquid film sealing device uses the positioning block for positioning and mounting, and no spigot positioning is needed between the seal and the equipment cavity, so that the problem that the sealing of the carbon fiber pump cannot achieve accurate mounting due to the fact that the spigot of the equipment cavity is positioned at the axial position of the seal and the radial position of the seal when the mechanical processing performance of the carbon fiber is very poor and the dimensional precision and the form tolerance precision are very poor through casting molding and positioning through the spigot is solved;

3. the O-shaped floating ring between the static ring at the medium side and the inner pressure cover faces the medium side, and the retainer ring is arranged on the side, which is not blocked by solid particles, so that the anti-blocking performance of the liquid film sealing device is further improved;

4. the sealing end face of the medium side movable ring of the carbon fiber pump liquid film sealing device is provided with a plurality of groups of microscopic grooves which are uniformly distributed circumferentially, so that the flow of sealing liquid leaked into a medium can be controlled to a certain extent, and the leakage of the sealing liquid can be ensured not to influence the process medium components but also to block the accumulation of granular media at a sealing position.

In general, the liquid film sealing device provided by the embodiment of the utility model has good wear resistance and sealing performance, is not easy to block when transporting media with solid particles, and has long service life.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic axial cross-sectional view of a liquid film sealing device provided by an embodiment of the present utility model;

FIG. 2 is a schematic view of a notch of a liquid film sealing device according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a micro groove on the end surface of a medium side moving ring of a liquid film sealing device provided by the embodiment of the utility model;

in the drawings, the reference numerals and corresponding part names:

1-shaft sleeve, 2-atmosphere side moving ring assembly, 3-atmosphere side stationary ring assembly, 4-medium side moving ring assembly, 5-medium side stationary ring assembly, 6-atmosphere side seal, 7-medium side seal, 8-notch, 9-outer gland, 10-diversion sleeve, 11-sealing liquid inlet, 12-sealing liquid outlet, 13-medium side moving ring, 14-micro groove, 15-positioning block, 16-atmosphere side moving ring seat, 17-atmosphere side moving ring, 18-inner gland, 19-O type floating ring, 20-retainer ring, 21-atmosphere side stationary ring, 22-atmosphere side stationary ring seat, 23-medium side moving ring seat, 24-medium side stationary ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Examples

As shown in fig. 1-3, the embodiment of the present utility model includes a shaft sleeve 1 mounted on a rotating shaft and a sealing assembly mounted on the shaft sleeve 1, wherein the shaft sleeve 1 and the sealing assembly cooperate to prevent leakage of a medium from a medium side to an atmosphere side and even prevent leakage of the atmosphere from the atmosphere side to the medium side, wherein the rotating shaft is in a direction from the atmosphere side to the medium side, the shaft sleeve 1 rotates along with the rotating shaft when the rotating shaft rotates, and the sealing assembly on the shaft sleeve 1 mechanically seals a carbon fiber pump, wherein a movable ring rotates along with the rotating shaft, and a stationary ring does not rotate along with the rotating shaft. The embodiment of the utility model is of a double-end-face integrated structure, namely, an atmosphere side moving ring assembly 2 and an atmosphere side static ring assembly 3 in a sealing assembly form an atmosphere side seal 6, a medium side moving ring assembly 4 and a medium side static ring 24 assembly 5 of the sealing assembly form a medium side seal 7, the atmosphere side seal 6 is positioned at one end close to the atmosphere side, and the medium side seal 7 is positioned at one end close to the medium side to form a double-end-face liquid film seal, so that the sealing effect of the liquid film sealing device for the carbon fiber pump provided by the embodiment of the utility model is ensured. The atmosphere side seal 6 and the medium side seal 7 are both sealed by liquid film and are in a non-contact running state, the sealing end face cannot be worn, and the sealing service life can be ensured. The axle sleeve 1 is close to atmosphere side seal 6 and is provided with notch 8, seal assembly's sealing liquid can pass in and out notch 8, when axle sleeve 1 rotates along with the rotation axis, notch 8 can agitate the sealing liquid, the sealing liquid can be in notch 8 buffering, simultaneously agitate the sealing liquid along with the rotation of rotation axis, it is sealed 6 and medium side seal 7 to push the sealing liquid to atmosphere side seal again, atmosphere side seal 6 and medium side seal 7's sealing liquid also can be jointly stirred, transport in notch 8, it is that the sealing liquid can form certain circulation between notch 8 and seal, can take away the heat in the sealing device through the sealing liquid like this, simultaneously at the in-process of stirring, solid particle can not pile up in notch 8 or seal, cause sealed effect decline or malfunction.

Preferably, in the embodiment of the utility model, an outer gland 9 and a diversion sleeve 10 are arranged on one end, close to a medium side, of the atmosphere side static ring assembly 3, the outer gland 9 is used for compressing and fixing a sealing assembly, a sealing liquid inlet and a sealing liquid outlet are also arranged in the sealing assembly, the sealing liquid inlet 11 and the sealing liquid outlet 12 are arranged on the outer gland 9, and the diversion sleeve 10 is communicated with the sealing liquid inlet 11 and the sealing liquid outlet 12 and can divert sealing liquid to the atmosphere side seal 6 and the medium side seal 7. Specifically, the sealing liquid enters the guide sleeve 10 from the sealing liquid inlet 11, the sealing liquid can be guided to the atmosphere side seal 6 and the medium side seal 7 through the guide of the guide sleeve 10, then a liquid film is formed, sealing is realized, meanwhile, the sealing liquid outlet is communicated with the guide sleeve 10, the sealing liquid absorbing the heat of the sealing assembly can flow out through the sealing liquid outlet 12, and meanwhile, the notch 8 has the pumping function and the storage function in combination with the notch 8, the sealing liquid can be driven to circulate in the sealing assembly, and the flowing space of the sealing liquid can be ensured not to have deposited impurities. Preferably, the notch 8 in the embodiment of the present utility model is a U-shaped notch 8,U type notch 8, which is simple and convenient, and has a stronger stirring and driving performance, although in other embodiments, a W-shaped notch 8 may be selected.

Because the solid particles on the medium side are more than those on the atmosphere side, in order to avoid the sealing accumulation of the solid particles on the medium side, in the embodiment of the utility model, as a preferable mode, the medium side moving ring assembly 4 comprises a medium side moving ring 13, the sealing end surface of the medium side moving ring 13 is provided with a plurality of groups of micro grooves 14 which are uniformly distributed circumferentially, when the medium side moving ring 13 rotates along with the shaft, the micro grooves 14 can generate pumping force so that sealing liquid leaks into a process medium on the medium side through the end surface of the medium side sealing ring 7, at the moment, the medium side moving ring 13 and the medium side static ring 24 do not contact, so that the medium side sealing ring 7 can not be worn due to contact operation, the solid particles can be prevented from accumulating on the medium side sealing ring 7, and in actual operation, the flow of the sealing liquid leaked into the medium can be controlled by changing the parameters and the number of the grooves 14 according to actual requirements.

Preferably, the sealing component is further provided with a positioning block 15, the function is that the sealing device and the equipment cavity do not need to be radially positioned only through a spigot, conventional mechanical seal comprises a static component and a dynamic component, the dynamic component is assembled on the shaft sleeve 1, the static component is assembled on the spigot of the equipment cavity, the spigot of the equipment cavity is the axial position of the positioning seal, and the radial position of the positioning seal is also positioned, however, due to poor mechanical processing performance of carbon fiber, the mechanical seal is formed by casting, the dimensional precision and the form tolerance precision are poor, the precision between the mechanical seal and the dynamic and static component is not guaranteed, the long-term use of the seal is influenced, in order to further solve the problem, as a preferred mode, the atmospheric side dynamic ring component 2 comprises an atmospheric side dynamic ring seat 16 and an atmospheric side dynamic ring 17, the atmospheric side dynamic ring seat 16 is axially far away from one end, one end of the positioning block 15 can be radially fixed on the atmospheric side dynamic ring seat 16 along the radial direction of a rotating shaft, the radial position of the positioning block 9 can be axially fixed on the outer gland 9, the positioning block 15 and the outer gland 9 are matched with the radial port, the axial position of each positioning block 15 can be axially fixed on the axial position of the equipment cavity by the positioning block and the axial position of the positioning seal and the equipment cavity by the axial position of the positioning block after being assembled, and the axial position of the equipment cavity is not required to be axially adjusted to be used as a sealing component, and the sealing position of the sealing position is reasonably sealed by the sealing device.

In a conventional mechanical seal dynamic-static ring, an O-shaped floating ring 19 is arranged, a part with elastic compensation capability such as a spring is used, so that the dynamic-static ring is always in a fitting state, an auxiliary sealing ring used on the ring with floating capability is usually called a floating ring according to functions, however, when the floating ring contacts with solid particles in a medium, the solid particles can be deposited and accumulated in all gaps where the sealing ring contacts with the medium, the O-shaped floating ring 19 contacted with the medium is easily blocked after the solid particles are solidified, the floating capability is lost, the O-shaped floating ring 19 is lost, the sealing device is lost in sealing performance, and the sealing service life is not ensured.

Therefore, in order to solve the above problem and further improve the blocking resistance, it is preferable that the medium side static ring assembly 5 of the embodiment of the present utility model includes a medium side static ring 24, the outer gland 9 is further provided with an inner gland 18 axially near the medium side, the inner gland 18 is radially near the rotating shaft side and connected with the medium side static ring 24, an O-shaped floating ring 19 is provided between the medium side static ring 24 and the inner gland 18, the O-shaped floating ring 19 faces the medium side, a retainer ring 20 is provided, the retainer ring 20 is made of an anti-corrosion and anti-wear material, and can prevent solid particles in the medium from accumulating at the floating ring position, resulting in lost sealing floatability. Meanwhile, preferably, the inner pressure cover 18 is in contact with the medium, the outer pressure cover 9 is not in contact with the medium, a pressure cover sealing gasket is arranged between the inner pressure cover 18 and the equipment cavity, the pressed pressure cover sealing gasket can prevent the medium from leaking from a gap between the equipment cavity and the inner pressure cover 18, and the inner pressure cover 18 is made of silicon carbide material, so that the inner pressure cover is not corroded, and is not abraded by the granular medium.

Preferably, the atmospheric side static ring assembly 3 comprises an atmospheric side static ring 21 and an atmospheric side static ring seat 22, wherein the atmospheric side static ring 21 is inlaid in the atmospheric side static ring seat 22, and the inlaid part is in interference fit, so that the atmospheric side static ring 21 and the atmospheric side static ring seat 22 can be prevented from rotating relatively, and the tightness can be ensured.

Preferably, the medium side moving ring assembly 4 comprises a medium side moving ring seat 23, a sealing groove is arranged on the end face of the medium side moving ring seat 23 facing the medium, a moving ring seat sealing gasket is arranged in the sealing groove, the impeller set compresses the moving ring seat sealing gasket, the compressed moving ring seat sealing gasket prevents the medium from leaking from between the impeller set and the medium side moving ring seat 23, and the medium is prevented from contacting the shaft sleeve 1 made of metal.

Preferably, the medium side moving ring 13 is assembled on the medium side moving ring seat 23, the medium side moving ring 13 is axially clamped by the medium side moving ring seat 23 and the shaft sleeve 1, and the first rotation preventing member provided on the medium side moving ring seat 23 can ensure that the medium side moving ring can rotate together with the medium side moving ring seat 23. The first O-ring prevents leakage of the medium from the gap between the medium-side moving ring seat 23 and the medium-side moving ring 13. The second O-ring prevents leakage of sealing liquid from the gap between the medium-side moving ring 13 and the sleeve 1.

Preferably, the inner gland 18 is in contact with the medium, the outer gland 9 is not in contact with the medium, a gland gasket is arranged between the inner gland 18 and the equipment cavity, the compressed gland gasket can prevent the medium from leaking from a gap between the equipment cavity and the inner gland 18, the inner gland 18 is made of silicon carbide material, corrosion and abrasion of the granular medium can be prevented, and the countersunk head screw is used for screwing the pressing plate on the outer gland 9. The air side moving ring seat 16 is fixed on the shaft sleeve 1 by the set screw, the air side moving ring 17 is arranged at one end of the air side moving ring seat 16 facing the medium side, one end of the anti-rotation piece is fixed on the air side moving ring 16, the other end of the anti-rotation piece stretches into a corresponding pin groove of the air side moving ring 17, the air side moving ring 17 can rotate along with the shaft, a third O-shaped ring is arranged between the air side moving ring 17 and the shaft sleeve 1, and sealing liquid can be prevented from leaking between the air side moving ring 16 and the shaft sleeve 1 by the third O-shaped ring.

In the embodiment of the utility model, the carbon fiber pump is sealed by a double-end-face integrated mechanical seal, the medium side movable ring 13, the medium side static ring 24 and the inner pressure cover are all made of silicon carbide, the medium side movable ring seat 23 is processed by special plastic materials, and the carbon fiber pump has good anti-corrosion and anti-wear capabilities, so that parts in contact with a medium in the seal are ensured not to be corroded and not to be worn by particles; according to the embodiment of the utility model, the medium side seal 7 adopts liquid film sealing, and the special end surface microscopic grooves 14 are arranged on the medium side movable ring 13 to control the flow of sealing liquid leaked into the medium, so that the particle medium is not accumulated at a sealing floating part, and meanwhile, the sealing end surface of the liquid film sealing is in a non-contact running state, the sealing end surface is not worn, and the sealing service life can be ensured; the carbon fiber seal provided by the embodiment of the utility model uses the integrated seal, and the positioning block 15 is used as a key part, so that the relative form and position tolerance between the seal dynamic and static components can be adjusted to a reasonable state. After the seal is integrally assembled on the equipment cavity, as no seam allowance is positioned between the seal and the equipment cavity, the connection between the seal and the equipment cavity only positions the axial position of the seal, and the radial position of the seal static assembly is positioned by the seal; in the embodiment of the utility model, a check ring 20 is further arranged at the medium side O-shaped floating ring 19, and the check ring 20 is made of anti-corrosion and anti-wear materials, so that solid particles in the medium can be prevented from accumulating at the floating ring position, and the sealing loses floatability.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and that descriptions of well-known components and processing techniques and procedures are omitted so as not to unnecessarily limit the present utility model.

Claims (10)

1. The utility model provides a liquid film sealing device for carbon fiber pump, includes shaft sleeve (1) and the sealing component of installing on shaft sleeve (1) that install on the rotation axis, and atmosphere side rotating ring assembly (2) and atmosphere side stationary ring assembly (3) in the sealing component form atmosphere side seal (6), and sealing component's medium side rotating ring assembly (4) and medium side stationary ring assembly (5) form medium side seal (7), and atmosphere side seal (6) are located near atmosphere side one end, and medium side seal (7) are located near medium side one end, a serial communication port, atmosphere side seal (6) and medium side seal (7) all adopt liquid film seal, shaft sleeve (1) are close to atmosphere side seal (6) and are provided with a plurality of notch (8), and sealing component's sealing fluid is full of notch (8).

2. The liquid film sealing device for the carbon fiber pump according to claim 1, wherein an outer gland (9) and a diversion sleeve (10) arranged on the outer gland (9) are arranged at one end, close to a medium side, of the atmosphere side static ring assembly (3), an inlet (11) of sealing liquid and an outlet (12) of the sealing liquid are arranged in the sealing assembly, the sealing liquid inlet (11) and the sealing liquid outlet (12) are arranged on the outer gland (9), and the diversion sleeve (10) is communicated with the sealing liquid inlet (11) and the sealing liquid outlet (12) and can conduct sealing liquid to the atmosphere side seal (6) and the medium side seal (7).

3. A liquid film sealing device for a carbon fiber pump according to claim 2, wherein the medium side moving ring assembly (4) comprises a medium side moving ring (13), and the sealing end surface of the medium side moving ring (13) is provided with a plurality of groups of microscopic grooves (14) which are uniformly circumferentially distributed.

4. A liquid film sealing device for a carbon fiber pump according to claim 3, wherein a positioning block (15) is further provided on the sealing assembly.

5. The liquid film sealing device for a carbon fiber pump according to claim 4, wherein the atmosphere side moving ring assembly (2) comprises an atmosphere side moving ring seat (16) and an atmosphere side moving ring (17), the atmosphere side moving ring (17) is installed at one end of the atmosphere side moving ring seat (16) which is far away from the atmosphere side axially, the positioning block (15) is radially fixed on the atmosphere side moving ring seat (16) at one side which is radially close to the rotating shaft and is axially fixed on the outer gland (9), and the positioning block (15) is radially matched with the outer gland (9) at one side which is radially far away from the rotating shaft.

6. A liquid film sealing device for a carbon fiber pump according to claim 1, wherein the notches (8) are uniformly distributed U-shaped notches.

7. The liquid film sealing device for the carbon fiber pump according to claim 2, wherein the medium side static ring assembly (5) comprises a medium side static ring (24), an inner gland (18) is further arranged on one side, axially close to the medium, of the outer gland (9), the inner gland (18) is connected with the medium side static ring (24) on one side, radially close to a rotating shaft, an O-shaped floating ring (19) is arranged between the medium side static ring (24) and the inner gland (18), the O-shaped floating ring (19) faces one side of the medium, and a retainer ring (20) is arranged on one side, close to the rotating shaft, of the inner gland.

8. The liquid film sealing apparatus for a carbon fiber pump according to claim 7, wherein an inner pressure cap gasket is provided between the inner pressure cap (18) and the equipment chamber.

9. The liquid film sealing device for the carbon fiber pump according to claim 1, wherein the atmosphere side static ring assembly (3) comprises an atmosphere side static ring (21) and an atmosphere side static ring seat (22), and the atmosphere side static ring (21) is inlaid in the atmosphere side static ring seat (22), and the inlaid part is in interference fit.

10. The liquid film sealing device for the carbon fiber pump according to claim 1, wherein the medium side moving ring assembly (4) comprises a medium side moving ring seat (23), a sealing groove is arranged on the end face of the medium side moving ring seat (23) facing the medium end, and a moving ring seat sealing gasket is arranged in the sealing groove.