Mechanical sealing device for discharge end of rotary kiln

Abstract

A mechanical sealing device of a discharging end of a rotary kiln is fixed outside a tail barrel of the rotary kiln and further comprises a movable ring assembly fixed on the tail barrel and rotating along with the tail barrel and a supporting ring arranged on the tail barrel in a sleeved mode, and the supporting ring is supported and adjusted through a movable supporting assembly. A static ring assembly is fixed to the end face of the inner side of the supporting ring, the movable ring assembly and the static ring assembly form a movable sealing mechanism, and the contact face of the movable ring assembly and the static ring assembly forms a sealing face A; a plurality of sets of pressing assemblies are further evenly arranged outside the supporting ring, the fixed ends of the pressing assemblies are fixed to the static ring assembly and the supporting ring, the movable ends of the pressing assemblies abut against the outside of the movable ring assembly, and the attaching force between the movable ring assembly and the static ring assembly is controlled through the pressing assemblies. The yellow phosphorus recovery device has the advantages of improving the recovery rate of yellow phosphorus, increasing economic benefits and reducing leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kiln mechanical seals, in particular to a mechanical seal device at a discharge end of a rotary kiln. Background Art

[0002] In the chemical industry, the rotary kiln contains phosphorus-containing wet flue gas (water, yellow phosphorus, phosphine, etc.) and ash (main components are SiO2, calcium phosphate, etc.) after the mud phosphorus is heated. The maximum temperature is 350°C and the working pressure is -100Pa to 100Pa.

[0003] Yellow phosphorus is a colorless waxy crystal with a melting point of 44.1°C and a boiling point of 280°C. It can spontaneously combust in the air at room temperature and is easily oxidized into phosphorus trioxide and phosphorus pentoxide, so it is often stored in water. Due to the flammable nature of yellow phosphorus, once the seal is poor, the yellow phosphorus in the kiln will come into contact with the outside air and spontaneously combust. First, the recovery rate of yellow phosphorus is reduced, and second, the leakage of yellow phosphorus is very likely to cause a fire. In addition, the leaked yellow phosphorus tail gas is mixed with some toxic gases, which not only endangers human health, but also causes air pollution.

[0004] At present, most manufacturers use packing seals. Although the sealing structure is simple, the packing wears quickly and the replacement cycle is short. The packing should be replaced about once a week. The temperature of the cylinder at the sealing part is high, about 200℃~240℃. The workers have great labor intensity in replacing the packing and are easily burned by high temperature. Moreover, a large amount of yellow phosphorus will leak in the process of replacing the packing every time, which is extremely unsafe and will also reduce the recovery rate of yellow phosphorus. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a mechanical sealing device for the discharge end of a rotary kiln, thereby solving the above-mentioned defects.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A mechanical sealing device for a rotary kiln discharge end, the device is fixed to the rear cylinder of the rotary kiln, and also includes:

[0008] A dynamic ring assembly is fixed on the tail cylinder and rotates with it, and a support ring is sleeved on the tail cylinder, and the support ring is supported and adjusted by a movable support assembly; a static ring assembly is fixed to the inner end face of the support ring, and the dynamic ring assembly and the static ring assembly constitute a dynamic sealing mechanism, and the contact surface between the dynamic ring assembly and the static ring assembly forms a sealing surface A; a plurality of groups of clamping assemblies are evenly arranged outside the support ring, and the fixed end of the clamping assembly is fixed to the static ring assembly and the support ring, and the movable end of the clamping assembly abuts against the outside of the dynamic ring assembly, and the clamping assembly is used to control the fitting force between the dynamic ring assembly and the static ring assembly.

[0009] In one or more embodiments of the utility model, the dynamic ring assembly includes a dynamic ring flange welded on the tail cylinder, and a clamping wheel track and a dynamic sealing ring are respectively fixed on both sides of the dynamic ring flange. The dynamic sealing ring abuts against the sealing surface of the static ring assembly, and the movable end of the clamping assembly abuts against the outside of the clamping wheel track.

[0010] In one or more embodiments of the present invention, the stationary ring assembly includes a fixing plate fixed to the inner end of the support ring, a static sealing ring is fixed outside the fixing plate, and the static sealing ring abuts against the sealing surface of the dynamic ring assembly.

[0011] In one or more embodiments of the utility model, the clamping assembly includes a pull rod bracket fixed on a support ring, a pull rod passing through the pull rod bracket, a locking nut is arranged at one end of the pull rod, a compression spring is also sleeved on the pull rod, the two ends of the compression spring respectively abut the pull rod bracket and the locking nut, the other end of the pull rod is fixed with a mounting plate, a clamping wheel is fixed on the mounting plate through a fixed shaft and a bearing, and the clamping wheel is in contact with the outer end of the dynamic ring assembly.

[0012] In one or more embodiments of the present invention, a spiral blade is welded outside the tail cylinder, and its rotation direction is the direction of the side plate of the discharge cover at the discharge end of the tail cylinder.

[0013] In one or more embodiments of the utility model, a labyrinth sealing assembly is arranged outside the tail cylinder, and the labyrinth sealing assembly includes a dynamic floating ring fixed outside the tail cylinder, a groove is formed on the outer side of the dynamic floating ring and a static floating ring is installed inside, and the static floating ring is fixed to the inner side of the support ring by an anti-rotation screw, and the static floating ring and the dynamic floating ring are located between the static ring assembly and the spiral blade.

[0014] In one or more embodiments of the utility model, a fixing groove is provided on the outer side of the support ring, a mounting hole is provided in the fixing groove, the anti-rotation screw passes through the mounting hole and is screwed into the static floating ring, and the opening of the fixing groove is sealed by a sealing cover plate; an ash discharge hole is provided at the bottom of the static floating ring, and the ash discharge hole is connected to the cleaning valve.

[0015] In one or more embodiments of the utility model, the movable support assembly includes two legs fixed to the ground, two ear seats relatively fixed to the outer side of the support ring, a pulley seat is fixed on the lower side of the extended end of the ear seat, a pulley is fixed in the pulley seat through a bearing and a shaft, a support plate is fixed on the leg, a slide groove is provided on the support plate, the bottom of the pulley is located in the slide groove, the slide groove guides the support ring, and can also adjust the elevation and left and right clearance of the support ring.

[0016] In one or more embodiments of the utility model, a static sealing mechanism is also provided on the outer side of the support ring, and the static sealing mechanism includes a stuffing box welded to the side plate of the discharge hood, and a sealing filler is provided between the stuffing box and the support ring. The sealing filler is compressed by a stuffing gland, and a sealing surface B is formed between the sealing filler and the support ring.

[0017] In one or more embodiments of the present invention, a grease pump is further provided outside the rotary kiln, and the output end of the grease pump is connected to a lubrication pipeline, and the discharge end of the lubrication pipeline leads to the sealing surface A.

[0018] Beneficial effects of the utility model:

[0019] 1. Considering the rotary kiln's large radial runout and high sealing requirements, the static seal is designed as a packing seal and the dynamic seal is designed as an end face seal. A mechanical seal structure with multiple seals such as labyrinth seals and spiral seals is adopted to ensure the effective operation of the dynamic seal.

[0020] 2. The dynamic and static sealing surfaces are compressed by springs, so that the sealing surfaces are always tightly fitted and the compression force is adjustable;

[0021] 3. The dynamic and static sealing surfaces are made of wear-resistant metal materials, and the maintenance cycle can reach 1 to 2 years; the static seal adopts packing seal, and the maintenance cycle is 3 to 6 months;

[0022] 4. A cleaning hole is opened at the lowest point of the dynamic floating ring and the static floating ring to discharge the material flowing through this hole, ensuring the long-term effective operation of the dynamic and static sealing surfaces;

[0023] 5. The pulley support structure is adopted to solve the thermal expansion displacement of the cylinder in the axial direction, ensuring that the dynamic and static friction rings are always fitted together in the hot and cold states; the pulley structure has a small friction coefficient and reduces the axial sliding resistance;

[0024] 6. The device solves the problem of frequent leakage on the sealing surface, improves the recovery rate of yellow phosphorus, increases economic benefits, reduces leakage and is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure 2 yes Figure 1 The enlarged view at position I in FIG.

[0027] Figure 3 It is a side view of the utility model. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0029] In this embodiment, Figures 1 to 3 As shown, a mechanical sealing device for the discharge end of a rotary kiln is fixed to the outside of the tail cylinder 1 of the rotary kiln, and also includes a dynamic ring assembly fixed on the tail cylinder 1 and rotating with it, and a support ring 10 sleeved on the tail cylinder 1, and the support ring 10 is supported and adjusted by a movable support assembly; a static ring assembly is fixed to the inner end face of the support ring 10, and the dynamic ring assembly and the static ring assembly constitute a dynamic sealing mechanism, and the contact surface of the dynamic ring assembly and the static ring assembly forms a sealing surface A; a plurality of groups of clamping assemblies are evenly arranged outside the support ring 10, and the fixed end of the clamping assembly is fixed to the static ring assembly and the support ring 10, and the movable end of the clamping assembly abuts against the outside of the dynamic ring assembly, and the fitting force between the dynamic ring assembly and the static ring assembly is controlled by the clamping assembly.

[0030] like Figure 1 As shown, Figure 1 The position of the sealing device is expressed from a macroscopic perspective. The sealing device is located between the tail end of the rotary kiln and the discharge hood. The rotary kiln is filled with mud phosphorus materials. Through external heating, the materials are heated and decomposed into phosphorus-containing wet flue gas (water, yellow phosphorus, phosphine, etc.) and ash (mainly composed of SiO2, calcium phosphate, etc.). The flue gas is discharged from the upper outlet of the discharge hood for recycling, and the ash is discharged from the lower outlet of the discharge hood. Because the working pressure of the equipment is -100Pa~100Pa, it is slightly positive and negative pressure, and the material is a flammable substance, it will spontaneously combust once it comes into contact with air. Therefore, the material used for sealing should have the characteristics of non-combustibility and high temperature resistance. Combined with the operating characteristics of the rotary kiln with low coaxiality and large temperature difference deformation, the end face seal is designed as its main seal, and a series of auxiliary seals are set in front of the main seal to ensure the effective operation of the main seal.

[0031] In this embodiment, the dynamic sealing mechanism is the main seal of the utility model, which drives the dynamic ring assembly to rotate through the tail cylinder 1, so that the dynamic ring assembly rotates and rubs on the contact surface of the static ring assembly, thereby forming a sealing surface A, and the gas flowing into the support ring 10 from the discharge end of the rotary kiln is sealed through the sealing surface A.

[0032] In one or more embodiments of the utility model, the dynamic ring assembly includes a dynamic ring flange 3 welded to the tail cylinder 1, and a clamping wheel track 2 and a dynamic sealing ring 4 are respectively fixed on both sides of the dynamic ring flange 3. The dynamic sealing ring 4 abuts against the sealing surface of the stationary ring assembly, and the movable end of the clamping assembly abuts against the outside of the clamping wheel track 2.

[0033] In one or more embodiments of the present invention, the stationary ring assembly includes a fixing plate fixed to the inner end of the support ring 10, a static sealing ring 5 is fixed outside the fixing plate, and the static sealing ring 5 abuts against the sealing surface of the dynamic ring assembly.

[0034] In this embodiment, the clamping wheel track 2, the dynamic ring flange 3 and the dynamic sealing ring 4 all rotate with the tail cylinder 1; and the static sealing ring 5 is fixed by bolts.

[0035] In one or more embodiments of the utility model, the clamping assembly includes a pull rod bracket 14 fixed on the support ring 10, a pull rod 13 passes through the pull rod bracket 14, a locking nut 16 is arranged at one end of the pull rod 13, and a compression spring 15 is also sleeved on the pull rod 13, and the two ends of the compression spring 15 respectively abut the pull rod bracket 14 and the locking nut 16, and the other end of the pull rod 13 is fixed with a mounting plate, and a clamping wheel 12 is fixed on the mounting plate through a fixed shaft and a bearing, and the clamping wheel 12 is in contact with the outer end of the dynamic ring assembly.

[0036] In this embodiment, the surface of the clamping wheel 12 fits with the clamping wheel track 2, and the clamping wheel 12 passes through the pull rod bracket 14 fixed on the support ring 10 through the pull rod 13. The tail of the pull rod 13 is a compression spring 15 and a locking nut 16. The fitting force between the dynamic sealing ring 4 and the static sealing ring 5 is controlled by adjusting the compression amount of the compression spring 15.

[0037] In one or more embodiments of the present invention, a spiral blade 11 is welded to the outside of the tail cylinder 1 , and its rotation direction is the direction of the discharge cover side plate 20 at the discharge end of the tail cylinder 1 .

[0038] In this embodiment, when too much material is accumulated in this section, the spiral blade 11 will push the material to the rear end to prevent blockage.

[0039] In one or more embodiments of the utility model, a labyrinth sealing assembly is provided outside the tail cylinder 1, and the labyrinth sealing assembly includes a dynamic floating ring 6 fixed to the outside of the tail cylinder 1, a groove is formed on the outer side of the dynamic floating ring 6 and a static floating ring 7 is installed inside, and the static floating ring 7 is fixed to the inner side of the support ring 10 by an anti-rotation screw 8, and the static floating ring 7 and the dynamic floating ring 6 are located between the static ring assembly and the spiral blade 11.

[0040] In one or more embodiments of the utility model, a fixing groove is provided on the outer side of the support ring 10, a mounting hole is provided in the fixing groove, the anti-rotation screw 8 passes through the mounting hole and is screwed into the static floating ring 7, and the opening of the fixing groove is sealed by a sealing cover plate 9; an ash discharge hole is provided at the bottom of the static floating ring 7, and the ash discharge hole is connected to the ash cleaning valve 25.

[0041] In this embodiment, the dynamic floating ring 6 is welded to the tail cylinder 1, and a static floating ring 7 is installed in its slot. There is a threaded hole at the 0° position on the upper part of the static floating ring 7, which is the installation hole of the anti-rotation screw 8. The anti-rotation screw 8 can slide in the fixed groove of the support ring 10 to adapt to the axial movement of the rotary kiln. The diameter of the installation hole is larger than the diameter of the anti-rotation screw 8. There is a row of ash holes at the 180° position at the bottom of the static floating ring 7, which is connected to the ash cleaning valve (sequence 25). The ash cleaning valve 25 is installed just below the support ring 10 and communicates with the static floating ring 7. When materials flow between the dynamic floating ring 6 and the static floating ring 7, the materials will be discharged from the lowest ash cleaning hole for harmless treatment.

[0042] In one or more embodiments of the utility model, the movable support assembly includes two legs 24 fixed to the ground, two ear seats 21 relatively fixed to the outer side of the support ring 10, a pulley seat is fixed to the lower side of the extended end of the ear seat 21, a pulley 22 is fixed in the pulley seat through a bearing and a shaft, a support plate is fixed on the legs 24, a slide groove 23 is opened on the support plate, the bottom of the pulley 22 is located in the slide groove 23, the slide groove 23 guides the support ring 10, and can also adjust the elevation and left and right clearance of the support ring 10.

[0043] In this embodiment, the clamping wheels 12 are evenly distributed on the circumference of the clamping wheel track 2 to ensure that the entire circumference is evenly stressed. On the left and right sides of the circumference are support lugs 21, which are fixed to the support ring 10 by bolts, and the lower part of the support lugs 21 is connected to a pulley 22. The entire support ring 10 and its attached parts transfer weight to the support legs 24 through the pulley 22, and can make adaptive sliding according to the axial movement of the rotary kiln.

[0044] In one or more embodiments of the utility model, a static sealing mechanism is also provided on the outer side of the support ring 10, and the static sealing mechanism includes a stuffing box 19 welded to the discharge hood side plate 20, and a sealing packing 18 is provided between the stuffing box 19 and the support ring 10. The sealing packing 18 is compressed by a packing gland 17, and a sealing surface B is formed between the sealing packing 18 and the support ring 10.

[0045] In this embodiment, a stuffing box 19 is provided at the outer side of the end of the support ring 10. The stuffing box 19 is welded to the side plate 20 of the discharge cover. The stuffing gland 17 presses the sealing stuffing 18 to achieve the purpose of sealing. The pressing force of the stuffing gland 17 is adjustable.

[0046] In one or more embodiments of the present invention, a grease pump 27 is further provided outside the rotary kiln. The output end of the grease pump 27 is connected to a lubrication pipeline 26 , and the discharge end of the lubrication pipeline 26 leads to the sealing surface A.

[0047] In this embodiment, the grease pump 27 regularly and quantitatively adds grease to the sealing surface A between the dynamic sealing ring 4 and the static sealing ring 5 through the lubrication pipeline 26 to reduce the wear of the sealing surface A.

[0048] Working principle of this utility model:

[0049] Before starting the equipment, add grease to the friction surface sealing surface A between the dynamic sealing ring 4 and the static sealing ring 5 through the grease pump 27 until the grease fills the sealing surface gap and forms an oil film on the sealing surface; adjust the locking nut 16 of the compression spring so that the clamping wheel 12 lightly touches the clamping wheel track 2, in order to reduce the friction of the sealing surface while ensuring a close fit between the sealing surfaces.

[0050] When the equipment is started, the pressure wheel track 2, the dynamic ring flange 3, the dynamic sealing ring 4, the dynamic floating ring 6, and the spiral blade 11 rotate together with the cylinder 1, and the other parts do not move; at this time, for the sealing surface A, the spiral blade 11 pushes the material to the discharge cover to prevent excessive material from flowing to the sealing surface A; when there is material flowing to the sealing surface A, it will pass through the labyrinth seal composed of the dynamic floating ring 6 and the static floating ring 7, and the labyrinth seal will block the passing material and discharge it from the cleaning hole below; the sealing surface A formed by the dynamic sealing ring 4 and the static sealing ring 5 is the last line of defense between the material and the outside world. The annular oil groove in the middle of the sealing surface is filled with grease, which provides effective protection for the formation of an oil film on the sealing surface. The oil film can effectively isolate materials, gases and other substances. As long as the sealing surface is regularly and quantitatively filled with grease, the seal can operate effectively for a long time; for the sealing surface B, the support ring 10 and the stuffing box 19 are both stationary, and the sealing stuffing 18 has no relative movement. It only needs to press the stuffing gland 17 to play a sealing role. Because there is no movement and wear, the service life is relatively long.

[0051] When the kiln body is heated and in working state, the tail cylinder 1 will expand due to heat, and will produce a certain displacement in the axial direction, that is, the seals on the tail cylinder 1 will also move axially. At this time, the pulley 22 carries all the seals on the support ring 10 and moves along with the tail cylinder 1. The seals will not be damaged due to lack of moving space. While moving, the sealing surfaces A and B are always in a tightly fitted state.

[0052] The operation and maintenance of the sealing device is also very simple. Add a certain amount of grease to the sealing surface A every shift; observe the fit of the clamping wheel and adjust it by the locking nut behind the compression spring; observe the sealing condition of the sealing surface B and adjust it by the clamping nut on the packing gland.

[0053] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connection" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

Claims

1. A mechanical sealing device for a rotary kiln discharge end, the device being fixed to the outside of the rear cylinder (1) of the rotary kiln, characterized in that: Also includes: A dynamic ring assembly fixed on the tail cylinder (1) and rotating with it, and a support ring (10) sleeved on the tail cylinder (1), wherein the support ring (10) is supported and adjusted by a movable support assembly; a static ring assembly is fixed to the inner end face of the support ring (10), the dynamic ring assembly and the static ring assembly constitute a dynamic sealing mechanism, and the contact surface between the dynamic ring assembly and the static ring assembly forms a sealing surface A; a plurality of groups of clamping assemblies are evenly arranged outside the support ring (10), the fixed end of the clamping assembly is fixed to the static ring assembly and the support ring (10), and the movable end of the clamping assembly abuts against the outside of the dynamic ring assembly, and the clamping assembly is used to control the fitting force between the dynamic ring assembly and the static ring assembly.

2. The mechanical sealing device at the discharge end of a rotary kiln according to claim 1, characterized in that: The dynamic ring assembly comprises a dynamic ring flange (3) welded to the tail cylinder (1), a clamping wheel track (2) and a dynamic sealing ring (4) are respectively fixed on both sides of the dynamic ring flange (3), the dynamic sealing ring (4) abuts against the sealing surface of the stationary ring assembly, and the movable end of the clamping assembly abuts against the outside of the clamping wheel track (2).

3. The mechanical sealing device at the discharge end of a rotary kiln according to claim 1, characterized in that: The stationary ring assembly comprises a fixing plate fixed to the inner end of the support ring (10), a static sealing ring (5) is fixed outside the fixing plate, and the static sealing ring (5) abuts against the sealing surface of the dynamic ring assembly.

4. The mechanical sealing device at the discharge end of a rotary kiln according to claim 1, characterized in that: The clamping assembly includes a pull rod bracket (14) fixed on the support ring (10), a pull rod (13) passing through the pull rod bracket (14), one end of the pull rod (13) is provided with a locking nut (16), and a compression spring (15) is also sleeved on the pull rod (13), the two ends of the compression spring (15) respectively abut the pull rod bracket (14) and the locking nut (16), the other end of the pull rod (13) is fixed with a mounting plate, and a clamping wheel (12) is fixed on the mounting plate through a fixed shaft and a bearing, and the clamping wheel (12) is in contact with the outer end of the dynamic ring assembly.

5. The mechanical sealing device at the discharge end of a rotary kiln according to claim 1, characterized in that: The tail cylinder (1) is welded with a spiral blade (11) on the outside, and its rotation direction is the direction of the discharge cover side plate (20) at the discharge end of the tail cylinder (1).

6. The mechanical sealing device at the discharge end of a rotary kiln according to claim 5, characterized in that: A labyrinth seal assembly is arranged outside the tail cylinder (1), and the labyrinth seal assembly includes a dynamic floating ring (6) fixed to the outside of the tail cylinder (1), a groove is formed on the outer side of the dynamic floating ring (6) and a static floating ring (7) is installed inside, and the static floating ring (7) is fixed to the inner side of the support ring (10) by an anti-rotation screw (8), and the static floating ring (7) and the dynamic floating ring (6) are located between the static ring assembly and the spiral blade (11).

7. The mechanical sealing device at the discharge end of a rotary kiln according to claim 6, characterized in that: The support ring (10) has a fixing groove on its outer side, a mounting hole in the fixing groove, the anti-rotation screw (8) passes through the mounting hole and is screwed into the static floating ring (7), and the opening of the fixing groove is sealed by a sealing cover plate (9); the static floating ring (7) has an ash discharge hole at its bottom, and the ash discharge hole is connected to the ash cleaning valve (25).

8. The mechanical sealing device at the discharge end of a rotary kiln according to claim 1, characterized in that: The movable support assembly comprises two legs (24) fixed to the ground, two ear seats (21) relatively fixed to the outer side of the support ring (10), a pulley seat is fixed on the lower side of the extended end of the ear seat (21), a pulley (22) is fixed in the pulley seat through a bearing and a shaft, a support plate is fixed on the legs (24), a slide groove (23) is provided on the support plate, the bottom of the pulley (22) is located in the slide groove (23), the slide groove (23) guides the support ring (10), and can also adjust the elevation and left and right clearance of the support ring (10).

9. The mechanical sealing device at the discharge end of a rotary kiln according to claim 5, characterized in that: A static sealing mechanism is also provided on the outer side of the support ring (10), and the static sealing mechanism includes a stuffing box (19) welded to the side plate (20) of the discharge hood, and a sealing stuffing (18) is provided between the stuffing box (19) and the support ring (10). The sealing stuffing (18) is compressed by a stuffing gland (17), and a sealing surface B is formed between the sealing stuffing (18) and the support ring (10).

10. The mechanical sealing device at the discharge end of a rotary kiln according to claim 1, characterized in that: A grease pump (27) is also provided outside the rotary kiln. The output end of the grease pump (27) is connected to a lubrication pipeline (26). The discharge end of the lubrication pipeline (26) leads to the sealing surface A.

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