CN217152989U

CN217152989U - Magnetic liquid sealing device for coal chemical reactor

Info

Publication number: CN217152989U
Application number: CN202220866943.2U
Authority: CN
Inventors: 罗小松
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-08-09
Anticipated expiration: 2032-04-14

Abstract

The utility model relates to a magnetic liquid sealing device for a coal chemical reactor, which comprises a flange seat, a magnetic conduction shaft sleeve, a sealing seat and a gland; the inner side of the sealing seat is provided with a magnetic liquid sealing component, a lower bearing and an upper bearing; a magnetic liquid seal is formed between the magnetic liquid seal assembly and the outer wall surface of the magnetic conduction shaft sleeve; the bottom surface of the gland tightly abuts against the outer ring of the upper bearing; a plurality of rectangular dentate sealing grooves are formed in the lower part of the inner wall surface of the flange seat at intervals along the axial direction; the upper part of the inner wall surface of the flange seat is provided with a T-shaped mounting groove along the radial direction; an air surrounding belt matched with the T-shaped mounting groove is mounted in the T-shaped mounting groove, and an extrusion groove is formed in the bottom of the T-shaped mounting groove in a manner that one end of the air surrounding belt is recessed inwards along the radial direction; an air inlet I and an air inlet II are formed in the outer wall surface of the flange seat along the radial direction of the flange seat; the air inlet I is communicated with the upper part of the inner cavity of the sealing groove; and the air inlet II is communicated with the inner cavity of the extrusion groove. The utility model discloses have that the leakproofness is good, corrosion-resistant and maintenance cost is low, safe and reliable's beneficial effect.

Description

Magnetic liquid sealing device for coal chemical reactor

Technical Field

The utility model relates to a mechanical rotary seal technical field especially relates to a magnetic liquid sealing device for coal chemical industry reactor.

Background

The coal chemical industry uses coal as raw material, and the coal is converted into gas, liquid and solid products or semi-products through chemical processing, and then further processed into chemical and energy products. Along with the continuous reduction of petroleum resources in the world, the coal chemical industry has wide prospects.

The main equipment in the coal chemical industry is a synthesis reactor, and the main raw materials in the reactor are toxic, harmful, flammable and explosive gases or liquids, which puts high requirements on the sealing of the reactor, on one hand, the sealing performance is required to be good, and on the other hand, the corrosion resistance is required. At present, imported double-end-face mechanical sealing is mainly adopted at home, on one hand, the double-end-face mechanical sealing needs to be provided with a sealing liquid circulation system and a cooling liquid circulation system, wherein the sealing liquid circulation system has certain internal leakage in the using process and can influence the quality of a produced product, on the other hand, the double-end-face mechanical sealing does not have an external leakage detection device and an emergency self-locking device, the production process has the risk which cannot be avoided, the damage to personnel and the pollution to the environment are easily caused, once the external leakage occurs, safety accidents are caused, and the normal production is seriously influenced; finally, the production, operation and maintenance cost investment of the whole coal chemical reactor is high. Therefore, it is an urgent need to solve the problem of the art to develop a novel sealing device with "zero leakage" sealing, safety, no pollution, and relatively low cost.

Disclosure of Invention

The utility model aims to solve the technical problem that a magnetism liquid seal device for coal chemical industry reactor is provided, have that the leakproofness is good, corrosion-resistant and the maintenance cost is low, safe and reliable's beneficial effect.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a magnetic liquid sealing device for a coal chemical reactor comprises a flange seat, a magnetic conduction shaft sleeve, and a sealing seat and a gland which are sequentially sleeved on the magnetic conduction shaft sleeve from bottom to top; the magnetic conduction shaft sleeve is sleeved and fixed on the main shaft; the flange seat is sleeved on the main shaft, and the top surface of the flange seat is detachably connected with the lower end surface of the sealing seat; a magnetic liquid sealing assembly, a lower bearing and an upper bearing which are sleeved on the magnetic conduction shaft sleeve are sequentially arranged on the inner side of the sealing seat from bottom to top; a magnetic liquid seal is formed between the magnetic liquid seal assembly and the outer wall surface of the magnetic conduction shaft sleeve; the bottom surface of the gland is detachably connected with the upper end surface of the sealing seat and tightly abuts against the outer ring of the upper bearing;

a plurality of rectangular toothed sealing grooves are formed in the lower part of the inner wall surface of the flange seat at intervals along the axial direction of the flange seat; the upper part of the inner wall surface of the flange seat is provided with a T-shaped mounting groove along the radial direction; an air shroud belt matched with the T-shaped mounting groove is mounted in the T-shaped mounting groove, and an extrusion groove is formed in the air shroud belt in a manner that one end of the air shroud belt at the bottom of the T-shaped mounting groove is recessed inwards along the radial direction of the air shroud belt; the outer wall surface of the flange seat is provided with an air inlet I and an air inlet II along the radial direction; the air inlet I is communicated with the upper part of the inner cavity of the sealing groove; and the air inlet II is communicated with the inner cavity of the extrusion groove.

The utility model has the advantages that: the magnetic conduction shaft sleeve rotates along with the main shaft, and the bottom surface of the flange seat is connected with the reactor shell; reaction gas is introduced into the gas inlet I, and uniformly enters the reactor through the plurality of rectangular toothed sealing grooves, and the reaction gas is not corrosive to the magnetic liquid sealing assembly; therefore, the reaction gas is continuously introduced to prevent the impurity gas in the reactor from diffusing outwards to corrode the magnetic liquid sealing assembly on the upper part, and the service life of the sealing device is further prolonged; gaps between the plurality of rectangular toothed sealing grooves and the outer wall surface of the rotary main shaft are filled with reaction gas and form gas pressure sealing step by step, and the formed multi-stage gas pressure sealing can effectively prevent internal impurity gas or dust from leaking, so that the sealing property is good; when gas leakage is detected or maintenance is carried out, inert gas is introduced into the gas inlet II, the introduced inert gas extrudes the air shroud in the extrusion groove, and then the air shroud protrudes towards the opening end of the T-shaped installation groove and forms static contact sealing with the outer wall surface of the main shaft, so that the effect of preventing sealing medium leakage is achieved; after maintenance, stopping introducing the inert gas, and restoring the air shroud ring to the original shape under the action of the elastic force of the air shroud ring; convenient maintenance, low cost, safety and reliability.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the sealing grooves comprise a first sealing groove and a plurality of second sealing grooves arranged at intervals below the first sealing groove, and the axial width of the first sealing groove is larger than that of the second sealing groove; the first sealing groove is communicated with the air inlet I.

The beneficial effect of adopting the further scheme is that: reaction gas enters the first sealing groove through the gas inlet I, the axial width of the first sealing groove is large, so that the reaction gas can enter the first sealing groove and gradually and downwards fill the second sealing grooves, the first sealing groove and the second sealing groove are communicated, and the gap between the first sealing groove and the second sealing groove and the magnetic conduction shaft sleeve is filled with the reaction gas with certain pressure, so that multi-stage gas pressure sealing is formed, and the leakage of impurity gas inside the reactor is effectively prevented.

Furthermore, a pressing plate is embedded at one side, close to the main shaft, of the top surface of the flange seat, and the pressing plate and the inner wall surface of the flange seat are flush and are both recessed along the radial direction and are formed with the T-shaped mounting grooves; one end of the air shroud ring, which is opened in the T-shaped mounting groove, is a sealing part; the section of the extrusion groove is semicircular, and the semicircular top of the extrusion groove is sunken towards the direction of the sealing part.

The beneficial effect of adopting the further scheme is that: the pressing plate is connected with the top surface of the flange seat through a bolt, and the top surfaces and the inner wall surfaces of the pressing plate and the flange seat are flush; when the air shroud ring is installed, the pressing plate is firstly disassembled, and then the pressing plate is installed after the air shroud ring is installed, so that the installation operation of the air shroud ring is facilitated, and the air shroud ring is prevented from being damaged during installation; the top of the semicircular section of the extrusion groove is sunken towards the sealing part, so that the sealing part is extruded by inert gas to generate elastic deformation, and the sealing part protrudes out of the opening end of the T-shaped installation groove and forms static contact sealing with the main shaft to prevent sealing media from leaking.

Furthermore, an annular cooling water channel which extends along the axial direction of the sealing seat and is annular is arranged in the side wall of the sealing seat, a water inlet is formed in the position, corresponding to the lower end of the cooling water channel, of the outer wall surface of the sealing seat along the radial direction of the cooling water channel, and a water outlet is formed in the position, corresponding to the upper end of the cooling water channel, of the outer wall surface of the sealing seat along the radial direction of the cooling water channel.

The beneficial effect of adopting the further scheme is that: in the process of rotating and sealing the magnetic liquid filled between the magnetic liquid sealing assembly and the magnetic conduction shaft sleeve, the magnetic conduction shaft sleeve drives the magnetic liquid to rotate, and the viscous force of the magnetic liquid generates a viscosity heat effect to cause the temperature of the magnetic liquid to rise; in addition, the high temperature in the reactor can be transmitted to the position of the magnetic liquid sealing assembly through the main shaft and the magnetic conduction shaft sleeve, so that the sealing performance of the magnetic liquid sealing assembly is influenced; through set up annular cooling water passageway in the seal receptacle, can cool off seal receptacle and inside magnetic liquid seal assembly, guarantee its sealing performance.

Further, the magnetic liquid sealing assembly comprises a pole shoe I, a permanent magnet I, a pole shoe II, an isolation pad, a pole shoe III, a permanent magnet II and a pole shoe IV which are sequentially arranged from bottom to top; a plurality of radial grooves are formed in the inner wall surfaces of the pole shoe I, the pole shoe II, the pole shoe III and the pole shoe IV at intervals along the axial direction respectively, and magnetic liquid is filled in gaps between the radial grooves and the outer wall surface of the magnetic conduction shaft sleeve; and sealing rings are respectively arranged between the outer wall surfaces of the pole shoe I, the pole shoe II, the pole shoe III and the pole shoe IV and the inner wall surface of the sealing seat.

The beneficial effect of adopting the further scheme is that: the permanent magnet I and the pole shoe II at the two ends of the permanent magnet I, the permanent magnet II and the pole shoe III and the pole shoe IV at the two ends of the permanent magnet II form two groups of magnetic liquid seals, and the magnetic fields are isolated and separated through isolation pads; the magnetic liquid is filled in the gap between the radial groove of the pole shoe and the outer wall surface of the magnetic conduction shaft sleeve under the action of the magnetic field, the magnetic liquid seal has the characteristic of keeping and restoring the original state, the rotary seal effect is good, and zero leakage seal is realized.

Further, a threaded sleeve is connected to the bottom of the inner wall surface of the sealing seat in a threaded manner; the longitudinal section of the thread bushing is in an inverted U shape; the upper end face of the threaded sleeve is abutted against the bottom face of the pole shoe I, and a framework oil seal is arranged between the groove in the inner part of the threaded sleeve and the outer wall face of the magnetic conduction shaft sleeve.

The beneficial effect of adopting the further scheme is that: the thread bush is used for limiting the axial position of the magnetic liquid sealing assembly, and further prevents sealing media from entering the position of the magnetic liquid sealing assembly to cause damage through the framework oil seal.

Furthermore, the outer ring of the upper bearing and the outer ring of the lower bearing are abutted by a positioning sleeve; the outer wall surface of the magnetic conduction shaft sleeve is provided with a plurality of radial assembling grooves corresponding to the positions of the lower bearing and the upper bearing respectively and is provided with a spring retainer ring for a shaft; the inner ring upper end surface of the lower bearing, the inner ring upper end surface of the upper bearing and the lower end surface of the upper bearing are respectively abutted against the spring retainer ring for the shaft; the lower end surface of the inner ring of the lower bearing is abutted against a stop block I which is protruded along the radial direction of the magnetic conduction shaft sleeve; a stop block II is formed on the inner wall surface of the sealing seat in a protruding mode along the diameter, and the lower end face of the stop block II is abutted to the top surface of the pole shoe IV; and a framework oil seal is arranged between the upper end surface of the stop block II and the lower end surface of the stop block I.

The beneficial effect of adopting the further scheme is that: the upper bearing inner ring and the lower bearing inner ring are axially limited through a spring retainer ring for the shaft and a stop block I, and the magnetic liquid sealing assembly is axially limited through a stop block II; the framework oil seal is used for isolating a part bearing needing to be lubricated in the transmission part from the external environment, so that the leakage of lubricating oil is avoided; and prevent sealing medium from entering the bearing location and causing damage.

Further, the outer wall surface of the gland is provided with a detection port along the radial direction; the bottom surface of the gland is provided with a positioning block I in a protruding and forming mode along the axial direction of the gland, the positioning block I is inserted into the inner wall surface of the sealing seat, and the bottom end of the positioning block I abuts against the upper bearing outer ring; a detection channel is communicated with the inside of the detection port, the detection channel is L-shaped, and one end of the detection channel extends to the bottom surface of the gland; a sealing ring is arranged between the bottom surface of the gland and the upper end surface of the sealing seat and is connected with the bottom surface of the gland through a bolt I; and a framework oil seal is arranged between the inner wall surface of the gland and the outer wall surface of the magnetic conduction shaft sleeve.

The beneficial effect of adopting the further scheme is that: gas leakage is detected in real time through the detection port and the detection channel, and when the gas leakage is detected, inert gas is introduced into the gas inlet II to extrude the air shroud band to form contact seal with the magnetic conduction shaft sleeve so as to prevent reaction gas or impurity gas from continuously leaking; the gland is convenient to position and install through the positioning block I; the framework oil seal prevents external dust from entering the bearing to cause damage.

Further, a driving sleeve is mounted at the top end of the magnetic conduction shaft sleeve, and the longitudinal section of the driving sleeve is in an inverted U shape; the upper portion of the outer wall surface of the driving sleeve is radially provided with a mounting hole and is screwed and fixed with the main shaft through a set screw, the inner groove of the driving sleeve is sleeved at the top end of the magnetic conduction shaft sleeve, and the lower portion of the outer wall surface of the driving sleeve is radially provided with a mounting hole and is screwed and fixed with the outer wall surface of the magnetic conduction shaft sleeve through a set screw.

The beneficial effect of adopting the further scheme is that: the rotating main shaft and the magnetic conduction shaft sleeve are connected together through the driving sleeve and the set screw, so that the rotating main shaft drives the magnetic conduction shaft sleeve to rotate together.

Furthermore, a positioning block II is formed on the lower end face of the sealing seat in a protruding mode along the axial direction of the sealing seat, and a positioning groove connected with the positioning block II in an inserting mode is formed in the top face of the flange seat; and a sealing ring is arranged between the top surface of the flange seat and the lower end surface of the sealing seat and is connected with the lower end surface of the sealing seat through a bolt II.

The beneficial effect of adopting the further scheme is that: the positioning block II is convenient for positioning and mounting the sealing seat, so that the magnetic liquid sealing assembly in the sealing seat and the upper and lower bearings are radially limited, and the gap between the magnetic liquid sealing assembly and the magnetic conduction shaft sleeve is ensured.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model has the advantages that the reaction gas is introduced into the gas inlet I and uniformly enters the reactor through the rectangular dentate sealing grooves, so that the impurity gas in the reactor is prevented from diffusing outwards to corrode the magnetic liquid sealing assembly at the upper part by continuously introducing the reaction gas, and the service life of the sealing device is prolonged; gaps between the plurality of rectangular toothed sealing grooves and the outer wall surface of the main shaft are filled with reaction gas and form gas pressure sealing step by step, and the formed multi-stage gas pressure sealing can effectively prevent internal impurity gas or dust from leaking, so that the sealing property is good; the axial width of the first sealing groove communicated with the gas inlet I is large, so that the introduction of reaction gas is facilitated;

(2) the utility model discloses a set up the detection mouth and detect gas leakage in real time, when detecting gas leakage or overhauing, let in inert gas in air inlet II, the inert gas who lets in extrudes the air surrounding band sealing member in the extrusion groove, and then the sealing member is outwards protruded out T shape mounting groove open end and forms static contact pressure seal with the outer wall of main shaft between, thereby form urgent auto-lock and seal, play the effect of preventing the sealing medium from continuing to leak; after maintenance, stopping introducing the inert gas, and restoring the air shroud ring to the original shape under the action of the elastic force of the air shroud ring; the maintenance is convenient, the cost is low, and the safety and the reliability are realized; the top of the semicircular section of the extrusion groove is sunken towards the sealing part, so that the sealing part is extruded by the introduced inert gas to generate elastic deformation;

(3) the cooling water channel is arranged in the sealing seat, in the rotating process of the main shaft and the magnetic conduction shaft sleeve, magnetic liquid is filled between the magnetic liquid sealing assembly and the magnetic conduction shaft sleeve, the magnetic conduction shaft sleeve drives the magnetic liquid to rotate, and the viscous force of the magnetic liquid generates viscosity heat effect to cause the temperature of the magnetic liquid to rise; in addition, the high temperature in the reactor can be transmitted to the position of the magnetic liquid sealing assembly through the main shaft and the magnetic conduction shaft sleeve, so that the sealing performance of the magnetic liquid sealing assembly is influenced; the sealing seat and the magnetic liquid sealing assembly inside the sealing seat can be cooled through the cooling water channel, so that the sealing performance of the sealing seat is ensured;

(4) the utility model has the advantages that the pressing plate is embedded on the flange seat, the pressing plate is firstly detached during installation, and then the pressing plate is installed after the air shroud band is installed, so that the installation operation of the air shroud band is convenient, and the air shroud band is prevented from being damaged during installation; the positioning block I is arranged to facilitate positioning and installation of the gland; the positioning block II is arranged to facilitate positioning and installation of the sealing seat, so that the magnetic liquid sealing assembly and the upper and lower bearings in the sealing seat are limited in the radial direction, and a gap between the magnetic liquid sealing assembly and the magnetic conduction shaft sleeve is ensured; the magnetic conduction shaft sleeve and the main shaft are connected more tightly through the driving sleeve; the whole structure is reasonable in design, convenient to install and accurate in positioning.

Drawings

Fig. 1 is a sectional view of the magnetic liquid sealing device for the coal chemical reactor of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

fig. 4 is a partially enlarged view of C in fig. 1.

In the drawings, the components represented by the respective reference numerals are listed below:

1-a flange seat; 2-pressing a plate; 3-an air shroud; 4-sealing groove; 5-thread bushing; 6-framework oil seal; 7-a magnetic liquid seal assembly; 8-magnetic conduction shaft sleeve; 9-a lower bearing; 10-positioning the sleeve; 11-a sealing seat; 12-an upper bearing; 13-pressing cover; 14-set screws; 15-a driving sleeve; 16-bolt I; 17-a sealing ring; 18-spring retainer ring for shaft; 19-cooling water channels; 20-a stop block I; 21-a stop block II; 22-bolt II; 23-bolt III; 24-positioning block I; 25-positioning block II; 31-an extrusion groove; 32-a seal; 41-a first seal groove; 42-a second seal groove; 71-pole shoe I; 72-permanent magnet I; 73-pole shoe II; 74-a spacer; 75-pole shoe III; 76-permanent magnet II; 77-pole shoe IV; 101-air inlet I; 102-air inlet II; 103-a water inlet; 104-water outlet; 105-detection port.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention discloses a magnetic liquid sealing device for a coal chemical reactor, which includes a flange seat 1, a magnetic shaft sleeve 8, and a sealing seat 11 and a gland 13 sequentially sleeved on the magnetic shaft sleeve 8 from bottom to top; the magnetic conduction shaft sleeve 8 is sleeved and fixed on the main shaft; the flange seat 1 is sleeved on the main shaft, and the top surface of the flange seat is detachably connected with the lower end surface of the sealing seat 11; the inner side of the sealing seat 11 is sequentially provided with a magnetic liquid sealing component 7, a lower bearing 9 and an upper bearing 12 which are sleeved on the magnetic conduction shaft sleeve 8 from bottom to top; a magnetic liquid seal is formed between the magnetic liquid seal assembly 7 and the outer wall surface of the magnetic conduction shaft sleeve 8; the bottom surface of the gland 13 is detachably connected with the upper end surface of the sealing seat 11 and tightly abuts against the outer ring of the upper bearing 12;

a plurality of rectangular dentate sealing grooves 4 are arranged at the lower part of the inner wall surface of the flange seat 1 at intervals along the axial direction; a T-shaped mounting groove is formed in the upper part of the inner wall surface of the flange seat 1 along the radial direction of the flange seat; an air shroud band 3 matched with the T-shaped mounting groove is mounted in the T-shaped mounting groove, and a pressing groove 31 is formed in the air shroud band 3 at one end of the bottom of the T-shaped mounting groove in a radially inward concave mode; the outer wall surface of the flange seat 1 is provided with an air inlet I101 and an air inlet II 102 along the radial direction; the air inlet I101 is communicated with the upper part of the inner cavity of the sealing groove 4; and the air inlet II 102 is communicated with the inner cavity of the extrusion groove 31. The inner wall surface of the magnetic conduction shaft sleeve 8 is respectively provided with a sealing ring 17 along the axial two ends.

In order to further optimize the technical solution, as shown in fig. 2, the seal groove 4 includes a first seal groove 41 and a plurality of second seal grooves 42 arranged at intervals below the first seal groove 41, and an axial width of the first seal groove 41 is greater than an axial width of the second seal groove 42; first seal groove 41 communicates with intake port i 101.

In order to further optimize the technical scheme, as shown in fig. 3, a pressing plate 2 is embedded at one side of the top surface of the flange seat 1, which is close to the main shaft, and the pressing plate 2 is flush with the inner wall surface of the flange seat 1, is both recessed along the radial direction and is formed with a T-shaped mounting groove; one end of the air shroud 3 at the opening of the T-shaped mounting groove is provided with a sealing part 32; the cross section of the pressing groove 31 is semicircular and the semicircular top thereof is recessed toward the sealing portion 32. And a sealing ring 17 is arranged between the pressure plate 2 and the flange seat 1 and is connected with the flange seat through an inner hexagon bolt.

In order to further optimize the above technical solution, an annular cooling water channel 19 extending along the axial direction is formed in the side wall of the sealing seat 11, a water inlet 103 is formed along the radial direction at a position of the outer wall surface of the sealing seat 11 corresponding to the lower end of the cooling water channel 19, and a water outlet 104 is formed along the radial direction at a position of the outer wall surface of the sealing seat 11 corresponding to the upper end of the cooling water channel 19.

In order to further optimize the technical scheme, as shown in fig. 4, the magnetic liquid sealing assembly 7 comprises a pole shoe i 71, a permanent magnet i 72, a pole shoe ii 73, an isolation pad 74, a pole shoe iii 75, a permanent magnet ii 76 and a pole shoe iv 77 which are sequentially arranged from bottom to top; a plurality of radial grooves are formed in the inner wall surfaces of the pole shoe I71, the pole shoe II 73, the pole shoe III 75 and the pole shoe IV 77 at intervals along the axial direction respectively, and magnetic liquid is filled in a gap between each radial groove and the outer wall surface of the magnetic conduction shaft sleeve 8; sealing rings 17 are respectively arranged between the outer wall surfaces of the pole piece I71, the pole piece II 72, the pole piece III 73 and the pole piece IV 74 and the inner wall surface of the sealing seat 11.

In order to further optimize the technical scheme, the threaded sleeve 5 is connected to the bottom of the inner wall surface of the sealing seat 11 in a threaded mode; the longitudinal section of the thread bush 5 is in an inverted U shape; the upper end surface of the threaded sleeve 5 is abutted against the bottom surface of the pole shoe I71, and a framework oil seal 6 is arranged between the inner groove of the threaded sleeve 5 and the outer wall surface of the magnetic conduction shaft sleeve 8.

In order to further optimize the technical scheme, the upper bearing 12 and the outer ring of the lower bearing 9 are tightly propped through the positioning sleeve 10; the outer wall surface of the magnetic conduction shaft sleeve 8 is provided with a plurality of radial assembling grooves corresponding to the positions of the lower bearing 9 and the upper bearing 12 respectively and is provided with a spring retainer ring 18 for a shaft; the upper end face of the inner ring of the lower bearing 9 and the upper end face and the lower end face of the inner ring of the upper bearing 12 are respectively abutted against a spring retainer ring 18 for a shaft; the lower end surface of the inner ring of the lower bearing 9 is abutted with a stop block I20 which is protruded along the radial direction of the magnetic conduction shaft sleeve 8; a stop block II 21 is formed on the inner wall surface of the sealing seat 11 in a protruding mode along the diameter, and the lower end face of the stop block II 21 is abutted to the top surface of the pole piece IV 74; and a framework oil seal 6 is arranged between the upper end surface of the stop II 21 and the lower end surface of the stop I20. Preferably, the framework oil seal 6 is a tetrafluoro framework oil seal.

In order to further optimize the technical scheme, the outer wall surface of the gland 13 is provided with a detection port 105 along the radial direction; a positioning block I24 is formed on the bottom surface of the gland 13 in a protruding mode along the axial direction of the gland, the positioning block I24 is inserted into the inner wall surface of the sealing seat 11, and the bottom end of the positioning block I abuts against the outer ring of the upper bearing 12; a detection channel is communicated with the inside of the detection port 105, the detection channel is L-shaped, and one end of the detection channel extends to the bottom surface of the gland 13; a sealing ring 17 is arranged between the bottom surface of the gland 13 and the upper end surface of the sealing seat 11 and is connected with the bottom surface of the gland through a bolt I16; a framework oil seal 6 is arranged between the inner wall surface of the gland 13 and the outer wall surface of the magnetic conduction shaft sleeve 8. The bolt I16 is preferably a hexagon socket head cap screw. The interface ends of the air inlet I101, the air inlet II 102, the water inlet 103, the water outlet 104 and the detection port 105 are all conical pipe threads.

In order to further optimize the technical scheme, the top end of the magnetic conduction shaft sleeve 8 is provided with a driving sleeve 15, and the longitudinal section of the driving sleeve 15 is in an inverted U shape; the upper part of the outer wall surface of the driving sleeve 15 is provided with a mounting hole along the radial direction and is screwed and fixed with the main shaft through a set screw 14, the inner groove of the driving sleeve 15 is sleeved at the top end of the magnetic conduction shaft sleeve 8, and the lower part of the outer wall surface of the driving sleeve 15 is provided with a mounting hole along the radial direction and is screwed and fixed with the outer wall surface of the magnetic conduction shaft sleeve 8 through the set screw 14.

In order to further optimize the technical scheme, a positioning block II 25 is formed on the lower end face of the sealing seat 11 in a protruding mode along the axial direction of the sealing seat, and a positioning groove inserted with the positioning block II 25 is formed in the top face of the flange seat 1; and a sealing ring 17 is arranged between the top surface of the flange seat 1 and the lower end surface of the sealing seat 11 and is connected through a bolt II 22. The bolt II 22 is preferably a hexagon socket head cap screw.

When the utility model is used, the flange seat 1 and the sealing seat 11 are connected with the reactor shell base through the bolts III 23, and the bottom surface of the flange seat 1 is protruded along the axial direction thereof with a positioning boss which is inserted into the reactor shell base and sealed through the sealing ring 17; the magnetic conduction shaft sleeve 8 is connected with the main shaft through a driving sleeve 15 and a concave end set screw 14 to transmit torque and rotate along with the torque; after the reaction starts, reaction gas is continuously introduced into the gas inlet I101, the reaction gas uniformly enters the reactor through the plurality of rectangular toothed sealing grooves 4, and multi-stage gas pressure sealing is formed between the inner wall surface of the flange seat 1 and the main shaft, so that the leakage and corrosion of impurity gas in the reactor are effectively prevented from damaging the magnetic liquid sealing assembly 7; magnetic liquid is filled between a plurality of pole shoes of the magnetic liquid sealing component 7 and the magnetic conduction shaft sleeve 8 to form liquid seal, so that sealing media are prevented from leaking; cooling water enters the cooling water channel 19 from the water inlet 103 and is discharged from the water outlet 104, and the sealing seat 11 and the magnetic liquid sealing assembly 7 are cooled circularly; after the reaction is finished, stopping introducing the reaction gas, and no impurity gas is generated in the reactor.

The leakage of the reaction gas is detected in real time through the detection port 105, when the leakage of the reaction gas is detected, the inert gas is introduced into the gas inlet II 102, enters the extrusion groove 31 and extrudes the sealing part 32 to generate elastic deformation so that the sealing part protrudes out of the opening end of the T-shaped mounting groove, and then static contact sealing is formed between the sealing part and the rotating main shaft, so that the reaction gas or the impurity gas is prevented from continuously leaking; after the overhaul is finished, the inert gas is stopped to be introduced, and the air shroud 3 is restored under the action of the elastic restoring force of the air shroud.

During installation, the air shroud ring 3 is installed on the flange seat 1, and then the pressing plate 2 is connected with the flange seat 1 through the hexagon socket head cap screw, so that the air shroud ring 3 is installed in the T-shaped installation groove; a positioning block II on the lower end face of the mounting seat 11 is inserted and positioned with a positioning groove on the top face of the flange seat 1; the positioning block I on the bottom surface of the gland 13 is inserted and positioned with the upper end of the inner wall surface of the sealing seat 11, so that the installation is convenient and the positioning is accurate.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A magnetic liquid sealing device for a coal chemical reactor is characterized by comprising a flange seat (1), a magnetic conduction shaft sleeve (8), and a sealing seat (11) and a gland (13) which are sequentially sleeved on the magnetic conduction shaft sleeve (8) from bottom to top; the magnetic conduction shaft sleeve (8) is sleeved and fixed on the main shaft; the flange seat (1) is sleeved on the main shaft, and the top surface of the flange seat is detachably connected with the lower end surface of the sealing seat (11); a magnetic liquid sealing component (7), a lower bearing (9) and an upper bearing (12) which are sleeved on the magnetic conduction shaft sleeve (8) are sequentially arranged on the inner side of the sealing seat (11) from bottom to top; a magnetic liquid seal is formed between the magnetic liquid seal assembly (7) and the outer wall surface of the magnetic conduction shaft sleeve (8); the bottom surface of the gland (13) is detachably connected with the upper end surface of the sealing seat (11) and tightly abuts against the outer ring of the upper bearing (12);

a plurality of rectangular toothed sealing grooves (4) are formed in the lower part of the inner wall surface of the flange seat (1) at intervals along the axial direction of the flange seat; the upper part of the inner wall surface of the flange seat (1) is provided with a T-shaped mounting groove along the radial direction; an air shroud band (3) matched with the T-shaped mounting groove is mounted in the T-shaped mounting groove, and a pressing groove (31) is formed in the air shroud band (3) in a manner that one end of the bottom of the T-shaped mounting groove is recessed inwards along the radial direction of the air shroud band; the outer wall surface of the flange seat (1) is provided with an air inlet I (101) and an air inlet II (102) along the radial direction; the air inlet I (101) is communicated with the upper part of the inner cavity of the sealing groove (4); and the air inlet II (102) is communicated with the inner cavity of the extrusion groove (31).

2. The magnetic liquid sealing device for the coal chemical industry reactor is characterized in that the sealing groove (4) comprises a first sealing groove (41) and a plurality of second sealing grooves (42) which are arranged below the first sealing groove (41) at intervals, and the axial width of the first sealing groove (41) is greater than that of the second sealing groove (42); the first sealing groove (41) is communicated with the air inlet I (101).

3. The magnetic liquid sealing device for the coal chemical reactor is characterized in that a pressing plate (2) is embedded in one side, close to the main shaft, of the top surface of the flange seat (1), the pressing plate (2) is flush with the inner wall surface of the flange seat (1), and the pressing plate (2) and the inner wall surface of the flange seat (1) are both recessed along the radial direction and are formed with T-shaped mounting grooves; one end of the air shroud ring (3) at the opening of the T-shaped mounting groove is provided with a sealing part (32); the section of the extrusion groove (31) is semicircular, and the semicircular top of the extrusion groove is sunken towards the direction of the sealing part (32).

4. The magnetic liquid sealing device for the coal chemical reactor according to claim 1, wherein a cooling water channel (19) which extends along an axial direction and is annular is formed in a side wall of the sealing seat (11), a water inlet (103) is formed in the outer wall surface of the sealing seat (11) along a radial direction corresponding to a lower end position of the cooling water channel (19), and a water outlet (104) is formed in the outer wall surface of the sealing seat (11) along the radial direction corresponding to an upper end position of the cooling water channel (19).

5. The magnetic liquid sealing device for the coal chemical reactor as claimed in claim 1, wherein the magnetic liquid sealing component (7) comprises a pole piece I (71), a permanent magnet I (72), a pole piece II (73), an isolation pad (74), a pole piece III (75), a permanent magnet II (76) and a pole piece IV (77) which are sequentially arranged from bottom to top; a plurality of radial grooves are formed in the inner wall surfaces of the pole shoe I (71), the pole shoe II (73), the pole shoe III (75) and the pole shoe IV (77) at intervals along the axial direction respectively, and magnetic liquid is filled in a gap between each radial groove and the outer wall surface of the magnetic conduction shaft sleeve (8); and sealing rings (17) are respectively arranged between the outer wall surfaces of the pole shoe I (71), the pole shoe II (73), the pole shoe III (75) and the pole shoe IV (77) and the inner wall surface of the sealing seat (11).

6. The magnetic liquid sealing device for the coal chemical industry reactor as claimed in claim 5, wherein the bottom of the inner wall surface of the sealing seat (11) is in threaded connection with a threaded sleeve (5); the longitudinal section of the thread sleeve (5) is in an inverted U shape; the upper end face of the threaded sleeve (5) is abutted to the bottom face of the pole shoe I (71), and a framework oil seal (6) is arranged between the groove in the threaded sleeve (5) and the outer wall face of the magnetic conduction shaft sleeve (8).

7. The magnetic liquid sealing device for the coal chemical industry reactor is characterized in that the upper bearing (12) and the outer ring of the lower bearing (9) are tightly abutted through a positioning sleeve (10); the outer wall surface of the magnetic conduction shaft sleeve (8) is provided with a plurality of radial assembling grooves corresponding to the positions of the lower bearing (9) and the upper bearing (12) respectively and is provided with a spring retainer ring (18) for a shaft; the upper end surface of the inner ring of the lower bearing (9), the upper end surface of the inner ring of the upper bearing (12) and the lower end surface of the inner ring of the lower bearing are respectively abutted against the spring retainer ring (18) for the shaft; the lower end surface of the inner ring of the lower bearing (9) is abutted with a stop block I (20) which is protruded along the radial direction of the magnetic conduction shaft sleeve (8); a stop block II (21) is formed on the inner wall surface of the sealing seat (11) in a protruding mode along the diameter, and the lower end face of the stop block II (21) is abutted to the top face of the pole shoe IV (77); and a framework oil seal (6) is arranged between the upper end surface of the stop block II (21) and the lower end surface of the stop block I (20).

8. The magnetic liquid sealing device for the coal chemical industry reactor as claimed in claim 7, wherein the outer wall surface of the gland (13) is provided with a detection port (105) along the radial direction; a positioning block I (24) is formed by the bottom surface of the gland (13) in a protruding mode along the axial direction of the gland, the positioning block I (24) is inserted into the inner wall surface of the sealing seat (11), and the bottom end of the positioning block I abuts against the outer ring of the upper bearing (12); a detection channel is communicated with the inside of the detection port (105), the detection channel is L-shaped, and one end of the detection channel extends to the bottom surface of the gland (13); a sealing ring (17) is arranged between the bottom surface of the gland (13) and the upper end surface of the sealing seat (11) and is connected with the bottom surface of the gland through a bolt I (16); and a framework oil seal (6) is arranged between the inner wall surface of the gland (13) and the outer wall surface of the magnetic conduction shaft sleeve (8).

9. The magnetic liquid sealing device for the coal chemical reactor as claimed in claim 1, wherein a driving sleeve (15) is mounted at the top end of the magnetic conduction shaft sleeve (8), and the longitudinal section of the driving sleeve (15) is inverted U-shaped; the upper portion of the outer wall surface of the driving sleeve (15) is radially provided with a mounting hole and is screwed and fixed with the main shaft through a set screw (14), the inner groove of the driving sleeve (15) is sleeved at the top end of the magnetic conduction shaft sleeve (8), and the lower portion of the outer wall surface of the driving sleeve (15) is radially provided with a mounting hole and is screwed and fixed with the outer wall surface of the magnetic conduction shaft sleeve (8) through the set screw (14).

10. The magnetic liquid sealing device for the coal chemical reactor is characterized in that a positioning block II (25) is formed on the lower end surface of the sealing seat (11) in a protruding mode along the axial direction of the sealing seat, and a positioning groove inserted with the positioning block II (25) is formed in the top surface of the flange seat (1); and a sealing ring (17) is arranged between the top surface of the flange seat (1) and the lower end surface of the sealing seat (11) and is connected through a bolt II (22).