Sealing device of carbon black tail gas conveying fan

Abstract

The utility model discloses a carbon black tail gas conveying fan sealing device which comprises a motor rotating shaft, a sealing cylinder piece, a shaft sleeve and a carbon ring piece, one end of the motor rotating shaft is in transmission connection with a motor, and the other end of the motor rotating shaft penetrates through an air supply shell and then is connected with a rotating fan blade located in the air supply shell. The shaft sleeve is fixedly connected to the outer side of the motor rotating shaft in a sleeving mode, the outer side of the shaft sleeve is sleeved with a plurality of carbon ring pieces, the carbon ring pieces are arranged at equal intervals in the axis direction of the shaft sleeve, the carbon ring pieces are detachably connected with the shaft sleeve and can rotate along with the shaft sleeve, and airflow protrusions are arranged on the sides, close to the rotating fan blades, of the carbon ring pieces; the carbon ring parts are sleeved with the sealing cylinder part, the axial end of the sealing cylinder part is fixedly connected with the outer end face of the air supply shell, a plurality of sealing grooves are formed in the inner side wall of the sealing cylinder part in the axis direction of the sealing cylinder body at equal intervals, and the sealing grooves correspond to the carbon ring parts. And the peripheral end surfaces of the carbon ring pieces are inserted into the corresponding sealing grooves.

Description

Technical Field

[0001] The utility model relates to the field of carbon black production, in particular to a sealing device for a carbon black tail gas conveying fan. Background Art

[0002] Carbon black production is carried out under a back pressure of 2.0-3.0MPa. The atomized raw oil sprayed out from the raw oil gun contacts with the high-temperature and high-speed flue gas above 1970℃, and then undergoes a rapid cracking reaction to generate carbon black. The carbon black rapidly flows along the reaction section at high temperature to continue the cracking reaction. When it reaches the quenching section, it meets the quenching water sprayed in radially. The quenching water rapidly cools the carbon black to terminate the cracking reaction and produce the required type of carbon black. The mixture of carbon black and flue gas passes through the air preheater to heat the air through heat exchange, and the high-temperature flue gas continues to pass through the waste heat boiler to heat the water into steam with the excess heat. The flue gas continues to flow and heat the raw oil, and reaches the bag filter box to separate the flue gas and carbon black through the filter bag. The carbon black becomes a finished product after subsequent addition of water, binder, granulation and drying.

[0003] A conveying fan is needed during the flow of flue gas. However, it is found during use that when the wind pressure in the air supply housing of the conveying fan is too large, part of the wind or flue gas will leak out from the gap between the motor shaft and the air supply housing, causing energy waste and flue gas pollution of the environment. Patent No. CN202320271632.6 discloses a blower with an air-injected sealing carbon ring, which has multiple layers of carbon rings on the outside of the motor shaft. When the motor shaft rotates, the inner wall of the carbon ring and the shaft sleeve sleeved on the outside of the motor shaft undergo rotational friction, and the sealing effect between the multiple layers of carbon rings and the shaft sleeve is used to improve the sealing performance of the blower. However, in this structure, the carbon ring is very easy to be worn out by friction, thereby causing a gap between the carbon ring and the outer periphery of the motor shaft. The gap causes its sealing performance to decline, shortening the service life of the sealing mechanism, and it is necessary to improve it. Utility Model Content

[0004] The utility model aims to solve the above problems and provide a carbon black tail gas conveying fan sealing device with simple structure and improved sealing effect.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] The axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the axial end of the sealing member is fixedly connected to the outer side of the air supply housing, and the inner wall of the sealing member is provided with a plurality of sealing grooves at equal intervals along the axial direction of the sealing member, and the plurality of sealing grooves are provided corresponding to the plurality of carbon rings, and the outer peripheral end face of the carbon ring member is inserted into the corresponding sealing groove.

[0007] Furthermore, the carbon ring is in the shape of a circular plate, a mounting through hole is provided at the center of the carbon ring and the carbon ring is sleeved on the outside of the shaft sleeve through the mounting through hole.

[0008] Furthermore, the carbon ring component is composed of two symmetrically arranged movable parts which are relatively combined; the movable parts are in the shape of semicircular plates, and the opposing surfaces of the two movable parts are provided with semicircular grooves and combined to form a mounting through hole, and an accommodating groove is provided on the arc outer circumferential surface of the movable part along the circumferential direction of the movable part, and a spring part is embedded in the accommodating groove, and the spring part is arranged in a circular ring shape; when the two movable parts are relatively combined, the spring part is sleeved on the outside of the two movable parts and embedded in the accommodating grooves of the two movable parts, and the two movable parts are tightly fitted to the outside of the shaft sleeve through the elastic force of the spring part.

[0009] Furthermore, a limiting protrusion is integrally formed on the outer side of the sleeve, there are two limiting protrusions and the two limiting protrusions are symmetrically arranged on the outer circumferential surface of the sleeve, and the inner wall of the semicircular groove of the movable part is provided with a limiting groove corresponding to the limiting protrusion; when the movable part is arranged on the outer side of the sleeve, the limiting protrusion is embedded in the limiting groove of the movable part.

[0010] Furthermore, the airflow protrusion is arranged in a long strip shape, the length direction of the airflow protrusion is consistent with the radial direction of the movable part, there are a plurality of airflow protrusions and the plurality of airflow protrusions are arranged at equal intervals along the circumferential direction of the movable part, and the airflow protrusion and the movable part are integrally formed.

[0011] Furthermore, an oil passage is provided in the sealing cylinder, one end of the oil passage is provided with a plurality of bifurcations and is respectively connected to a plurality of sealing grooves through the plurality of bifurcations, and the other end of the oil passage is connected to a grease nipple provided on the outer wall of the sealing cylinder.

[0012] Furthermore, the sealing cylinder is formed by two semicircular pipes connected by bolts, and a connecting ear is provided at one end of the sealing cylinder close to the air supply shell and is bolted to the outer end wall of the air supply shell through the connecting ear.

[0013] Compared with the prior art, the utility model has the following advantages and positive effects:

[0014] When the utility model is in use, the carbon ring rotates with the motor shaft and the shaft sleeve, the outer end of the carbon ring is embedded in the sealing groove of the inner wall of the sealing cylinder and rotates in the sealing groove, the gap between the outer wall of the carbon ring and the inner wall of the sealing groove is small, and the blocking effect when the conveying fan leaks is achieved; at the same time, butter is filled in the sealing groove to improve the sealing effect between the carbon ring and the inner wall of the sealing groove, and the friction between the carbon ring and the inner wall of the sealing groove when the carbon ring rotates is correspondingly reduced, the friction loss of the carbon ring is reduced, and the service life of the sealing device is extended;

[0015] On the other hand, when the carbon ring component rotates, the air flow protrusion on the side of the carbon ring component close to the rotating fan blade will rotate with the carbon ring component, and a certain amount of flowing gas will be generated during its rotation. The flowing gas will disturb and hinder the wind force leaking from the air supply housing, thereby preventing the wind force in the air supply housing from continuing to leak out from the gap between the motor shaft and the air supply housing, further improving the sealing effect of the sealing device on the conveying fan, effectively avoiding energy waste and smoke pollution of the environment, and bringing convenience to carbon black production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a cross-sectional structural diagram of the utility model;

[0018] Figure 2 for Figure 1 A magnified view of the local structure;

[0019] Figure 3 This is the assembly structure diagram of the carbon ring component;

[0020] Figure 4 It is the horizontal end surface structure diagram of the moving part;

[0021] Figure 5 It is a schematic diagram of the structure of the shaft sleeve;

[0022] Figure 6It is the right view of the sealing cylinder. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the utility model.

[0024] like Figures 1 to 6 As shown, this embodiment discloses a sealing device for a carbon black tail gas conveying fan, including a motor shaft 2, a sealing cylinder 6, a sleeve 4, and a carbon ring 5. One end of the motor shaft 2 is connected to the motor transmission, and the other end of the motor shaft 2 passes through the air supply housing 1 and is connected to the rotating fan blade 3 located in the air supply housing 1; the sleeve 4 is fixedly sleeved on the outside of the motor shaft 2, and a plurality of carbon rings 5 ​​are sleeved on the outside of the sleeve 4 and the plurality of carbon rings 5 ​​are arranged at equal intervals along the axial direction of the sleeve 4. The carbon ring 5 is detachably connected to the sleeve 4 and The carbon ring part 5 can rotate with the shaft sleeve 4, and an airflow protrusion 502 is arranged on the side of the carbon ring part 5 close to the rotating fan blade 3; the sealing cylinder part 6 is sleeved on the outside of several carbon ring parts 5, and one axial end of the sealing cylinder part 6 is fixedly connected to the outer end face of the air supply shell 1, and the inner wall of the sealing cylinder body 6 is provided with several sealing grooves 602 at equal intervals along the axial direction of the sealing cylinder body 6, and several sealing grooves 602 are arranged corresponding to several carbon ring parts 5, and the outer peripheral end face of the carbon ring part 5 is inserted into the corresponding sealing groove 602.

[0025] The carbon ring 5 is in the shape of a circular plate, a mounting through hole is provided at the center of the carbon ring 5 and the carbon ring 5 is sleeved on the outer side of the shaft sleeve 4 through the mounting through hole.

[0026] The carbon ring component 5 is composed of two symmetrically arranged movable parts 501 which are relatively combined; the movable parts 501 are in the shape of semicircular plates, and the opposing surfaces of the two movable parts 501 are provided with semicircular grooves 5011 and combined to form a mounting through hole, and an accommodating groove 5012 is provided on the arc outer peripheral surface of the movable part 501 along the circumferential direction of the movable part 501, and the accommodating groove 5012 is arranged around the arc surface of the movable part 501, and a spring part 503 is embedded in the accommodating groove 5012, and the spring part 503 is arranged in a circular ring shape; when the two movable parts 501 are relatively combined, the spring part 503 is sleeved on the outside of the two movable parts 501 and embedded in the accommodating groove 5012 of the two movable parts 501, and the elastic force of the spring part 503 makes the two movable parts 501 fit tightly against the outside of the shaft sleeve 4.

[0027] A limiting protrusion 401 is integrally formed on the outer side of the shaft sleeve 4, and there are two limiting protrusions 401, which are symmetrically arranged on the outer circumferential surface of the shaft sleeve 4. A limiting groove 5013 corresponding to the limiting protrusion 401 is arranged on the inner wall of the semicircular groove 5011 of the movable part 501; when the movable part 501 is sleeved on the outer side of the shaft sleeve 4, the limiting protrusion 401 is embedded in the limiting groove 5013 of the movable part 501.

[0028] When installing the carbon ring part, first, the shaft sleeve is fixedly mounted on the outside of the motor shaft, and then two movable parts are respectively installed on both sides of the shaft sleeve, and at the same time, the limiting protrusion is inserted into the limiting groove of the movable part, and finally the circular rotating spring is mounted in the accommodating grooves of the two movable parts to achieve the connection between the movable part and the shaft sleeve; in the process of the movable part rotating with the shaft sleeve, even if the movable part is separated from the shaft sleeve under the action of centrifugal force, the limiting protrusion and the limiting groove will cooperate to prevent the movable part from separating from the shaft sleeve, thereby achieving stable connection and positioning of the two.

[0029] The airflow protrusion 502 is arranged in a long strip shape, and the length direction of the airflow protrusion 502 is consistent with the radial direction of the movable part 501. There are several airflow protrusions 502 and the several airflow protrusions 502 are arranged at equal intervals along the circumferential direction of the movable part 501. The airflow protrusion 502 and the movable part 501 are integrally formed.

[0030] The airflow protrusion will generate airflow when the carbon ring rotates. The shape of the airflow protrusion can be changed according to the situation. For example, the fan blade shape can be used in the present technical solution, and it also has the technical effect of the present technical solution.

[0031] An oil passage 603 is provided in the sealing cylinder 6, one end of the oil passage 603 is provided with a plurality of bifurcations and is respectively connected to a plurality of sealing grooves 602 through the plurality of bifurcations, and the other end of the oil passage 603 is connected to a grease nipple 7 provided on the outer wall of the sealing cylinder 6.

[0032] When in use, it is only necessary to regularly inject butter into the butter nozzle so that the butter can enter into each sealing groove through the oil passage, thereby achieving sealing and lubricating effects. The operation is more convenient, further improving the use effect of the utility model.

[0033] The sealing cylinder 6 is formed by two semicircular pipes connected by bolts, and a connecting ear 601 is provided at one end of the sealing cylinder 6 close to the air supply housing 1 and is bolted to the outer end wall of the air supply housing 1 through the connecting ear 601. The structure of the sealing cylinder facilitates the installation operation of the entire device and improves its installation convenience.

[0034] When the utility model is in use, the carbon ring rotates with the motor shaft and the shaft sleeve, the outer end of the carbon ring is embedded in the sealing groove of the inner wall of the sealing cylinder and rotates in the sealing groove, the gap between the outer wall of the carbon ring and the inner wall of the sealing groove is small, and the blocking effect when the conveying fan leaks is achieved; at the same time, butter is filled in the sealing groove to improve the sealing effect between the carbon ring and the inner wall of the sealing groove, and the friction between the carbon ring and the inner wall of the sealing groove when the carbon ring rotates is correspondingly reduced, the friction loss of the carbon ring is reduced, and the service life of the sealing device is extended;

[0035] On the other hand, when the carbon ring component rotates, the air flow protrusion on the side of the carbon ring component close to the rotating fan blade will rotate with the carbon ring component, and a certain amount of flowing gas will be generated during its rotation. The flowing gas will disturb and hinder the wind force leaking from the air supply housing, thereby preventing the wind force in the air supply housing from continuing to leak out from the gap between the motor shaft and the air supply housing, further improving the sealing effect of the sealing device on the conveying fan, effectively avoiding energy waste and smoke pollution of the environment, and bringing convenience to carbon black production.

Claims

1. A sealing device for a carbon black tail gas conveying fan, comprising a motor shaft, one end of which is connected to the motor in a transmission manner, and the other end of which passes through an air supply housing and is connected to a rotating fan blade located in the air supply housing; characterized in that: The carbon black exhaust gas conveying fan sealing device also includes a sealing cylinder, a sleeve, and a carbon ring. The sleeve is fixedly sleeved on the outside of the motor shaft, and a plurality of carbon rings are sleeved on the outside of the sleeve and are arranged at equal intervals along the axial direction of the sleeve. The carbon ring and the sleeve are detachably connected and the carbon ring can rotate with the sleeve, and an airflow protrusion is arranged on the side of the carbon ring close to the rotating fan blade; the sealing cylinder is sleeved on the outside of the plurality of carbon rings, and one axial end of the sealing cylinder is fixedly connected to the outer end face of the air supply shell, and a plurality of sealing grooves are arranged at equal intervals on the inner wall of the sealing cylinder along the axial direction of the sealing cylinder, and the plurality of sealing grooves are arranged corresponding to the plurality of carbon rings, and the outer peripheral end face of the carbon ring is inserted into the corresponding sealing groove.

2. The sealing device for the carbon black tail gas conveying fan according to claim 1, characterized in that: The carbon ring is in the shape of a circular plate, a mounting through hole is arranged at the center of the carbon ring, and the carbon ring is sleeved on the outer side of the shaft sleeve through the mounting through hole.

3. The sealing device for the carbon black tail gas conveying fan according to claim 2, characterized in that: The carbon ring component is composed of two symmetrically arranged movable parts which are relatively combined; the movable parts are in the shape of semicircular plates, and the opposing surfaces of the two movable parts are provided with semicircular grooves which are combined to form a mounting through hole, and an accommodating groove is provided on the arc outer peripheral surface of the movable part along the circumferential direction of the movable part, and a spring part is embedded in the accommodating groove, and the spring part is arranged in a circular ring shape; when the two movable parts are relatively combined, the spring part is sleeved on the outside of the two movable parts and embedded in the accommodating grooves of the two movable parts, and the two movable parts are tightly fitted to the outside of the shaft sleeve through the elastic force of the spring part.

4. The sealing device for the carbon black tail gas conveying fan according to claim 3, characterized in that: A limiting protrusion is integrally formed on the outer side of the sleeve, there are two limiting protrusions and the two limiting protrusions are symmetrically arranged on the outer circumferential surface of the sleeve, and a limiting groove corresponding to the limiting protrusion is arranged on the inner wall of the semicircular groove of the movable part; when the movable part is arranged on the outer side of the sleeve, the limiting protrusion is embedded in the limiting groove of the movable part.

5. The sealing device for the carbon black tail gas conveying fan according to claim 4, characterized in that: The airflow protrusion is arranged in a long strip shape, the length direction of the airflow protrusion is consistent with the radial direction of the movable part, there are a plurality of airflow protrusions and the plurality of airflow protrusions are arranged at equal intervals along the circumferential direction of the movable part, and the airflow protrusion is integrally formed with the movable part.

6. The sealing device for the carbon black tail gas conveying fan according to claim 5, characterized in that: An oil passage is arranged in the sealing cylinder, one end of the oil passage is provided with a plurality of bifurcations and is respectively connected with a plurality of sealing grooves through the plurality of bifurcations, and the other end of the oil passage is connected with a grease nipple arranged on the outer side wall of the sealing cylinder.

7. The sealing device for the carbon black tail gas conveying fan according to claim 6, characterized in that: The sealing cylinder is formed by two semicircular pipes connected by bolts. One end of the sealing cylinder close to the air supply housing is provided with a connecting ear and is bolted to the outer end wall of the air supply housing through the connecting ear.

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