A coal gas fan leakage sealing device

Abstract

The application discloses a coal gas fan leakage sealing device and relates to the technical field of coal gas blowers. The device comprises a water sealing assembly, which comprises a sealing shell, a baffle ring, a main shaft, a rotating body, heat dissipation fins, stepped grooves and a communication port. The baffle ring is fixed to the medium end of the sealing gas near the sealing shell, the main shaft is rotationally installed in the middle of the sealing shell in the axial direction, the baffle ring is distributed in steps along the length direction of the main shaft, the rotating body is coaxially fixed to the medium end of the sealing gas near the main shaft, and the heat dissipation fins are arrayed on the outer conical surface of the rotating body. During use, the stepped sealing teeth on the outer side of the baffle ring are matched with the stepped grooves on the inner wall of the cavity of the rotating body, so that the stepped labyrinth seal is formed, the throttling effect is achieved, the leakage is blocked, the water seal is formed through the injection of liquid and the centrifugal force generated by the rotation of the rotating body, the double leakage blocking is realized, and the purpose of zero leakage of the fan is achieved.

Description

Technical Field

[0001] This invention relates to the field of gas blower technology, specifically a gas blower leakage sealing device. Background Technology

[0002] In the recycling and purification workshop of a coking plant, a large gas blower is used in the condensation and blowing section. Its main function is to extract the gas from the coke oven and send it to the subsequent sections for further processing. Since coke oven gas contains about 5% carbon monoxide, which is harmful to the human body and is flammable and explosive, the sealing performance of the gas blower is very important as the main equipment for transporting coke oven gas.

[0003] Among the existing gas blower seals, packing seals and labyrinth seals are the simplest in structure, with low processing, operation, and maintenance costs. However, their sealing effect is not ideal and cannot achieve zero leakage. To achieve zero leakage during blower operation, sealing devices with higher processing, operation, and maintenance costs, such as nitrogen seals, are generally used to ensure that the sealing device has a better sealing effect. However, when the air volume is large, that is, when the blower model is large enough, if the material of the blower, the structure of the casing and impeller, the cooling device at the shaft end, etc. are not properly selected and designed, the blower will not be able to operate stably for a long time, resulting in economic losses and even safety accidents.

[0004] Therefore, in view of this, we have studied and improved the existing structure to address its shortcomings and proposed a gas blower leakage sealing device. Summary of the Invention

[0005] The purpose of this invention is to provide a gas blower leakage sealing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gas blower leakage sealing device, comprising a water sealing assembly, wherein the water sealing assembly comprises a sealing shell, a retaining ring, a main shaft, a rotating body, heat dissipation fins, a stepped groove, and a communication port. The retaining ring is fixed to the medium end of the sealing shell near the sealing gas, and the main shaft is axially rotatably mounted in the middle of the sealing shell, and the retaining ring is steppedly distributed along the length of the main shaft. The rotating body is coaxially fixed to the medium end of the main shaft near the sealing gas, and heat dissipation fins are distributed in an array on the outer conical surface of the rotating body. The inner wall of the rotating body cavity is provided with a stepped groove, and the stepped groove and the retaining ring cooperate to form a stepped labyrinth seal, and a communication port is formed between the end of the rotating body and the retaining ring.

[0007] Furthermore, a packing seal is fixed at one end of the sealing housing near the bearing housing, and the packing seal is radially covered and fastened to the outside of the main shaft. A water outlet is connected to the bottom end of the sealing housing.

[0008] Furthermore, one end of the main shaft is connected to a pulley via a bearing housing, and the other end of the main shaft is secured to an impeller via a nut.

[0009] Furthermore, the impeller is embedded inside the housing, and the rear side plate of the housing is fixed to the sealing housing by flange bolts.

[0010] Furthermore, a wind-cooled heat dissipation assembly is provided in the middle of the sealed housing. The wind-cooled heat dissipation assembly includes a drive parachute wheel and a transmission wheel. The drive parachute wheel is coaxially fixed with the middle of the main shaft, and a transmission wheel is engaged with the bottom end of one side of the drive parachute wheel.

[0011] Furthermore, the air-cooled heat dissipation assembly also includes a bracket, the transmission wheel is rotatably installed inside the bracket, and both ends of the bracket are welded and fixed to the bottom of the inner wall of the sealed housing.

[0012] Furthermore, the air-cooled heat dissipation assembly also includes a driven cone wheel and a cooling fan. The driven cone wheel is engaged with the top of the transmission wheel on the other side away from the drive umbrella wheel. The inner diameter of the driven cone wheel is larger than the outer diameter of the main shaft, and a cooling fan is fixedly arranged at the tail end of the driven cone wheel.

[0013] Furthermore, a spray water supply assembly is fixed to the inner wall of the sealed housing. The spray water supply assembly includes a sleeve and a water inlet. The sleeve is fixedly installed on the top of the inner wall of the sealed housing, and the top of the sleeve is connected to the water inlet, which is also connected to the top of the sealed housing.

[0014] Furthermore, the spray water supply assembly also includes a water supply pipe, the end of the sleeve is connected to the water supply pipe, and the end of the water supply pipe is connected to the gap between the retaining ring and the main shaft.

[0015] Furthermore, the spray water supply assembly also includes an inclined cavity and a spray nozzle. An inclined cavity is axially formed inside the sleeve, and a spray nozzle is formed through the bottom end of the inclined cavity, with the spray nozzle facing directly above the main shaft.

[0016] This invention provides a gas blower leakage sealing device, which has the following beneficial effects; 1. In the use of this invention, on the one hand, when the gas blower is running, the main shaft will drive the rotating body near the sealing gas medium end to rotate synchronously, so that the gas enters through the gap between the inner side of the baffle ring and the main shaft, and is discharged through the stepped labyrinth seal formed by the stepped sealing teeth on the outer side of the baffle ring and the stepped groove on the inner wall of the rotating body cavity. During this process, the leakage is blocked by the throttling effect. On the other hand, the liquid in the sleeve is connected to the gap between the inner side of the baffle ring and the main shaft through the end water supply pipe. Under the action of the centrifugal force generated by the rotation of the rotating body, the liquid fills the sealed cavity formed by the stepped sealing teeth on the outer side of the baffle ring and the stepped groove on the inner wall of the rotating body cavity, thereby completely blocking the only leakage connection of the gas, so that the blower achieves the purpose of zero leakage. This application achieves the purpose of zero leakage by the cooperation of the stepped sealing teeth on the outer side of the baffle ring and the stepped groove on the inner wall of the rotating body cavity, forming a stepped labyrinth seal to achieve the purpose of leakage blocking by the throttling effect, and simultaneously forming a water seal by the injection of liquid under the action of the centrifugal force generated by the rotation of the rotating body. 2. During the use of this invention, the liquid forms a water seal under centrifugal force to prevent leakage, while also absorbing heat conducted by the main shaft. The heat absorbed by the liquid is first conducted to the heat dissipation fins on the outer conical surface of the rotating body and dissipated into the surrounding air. Secondly, the coaxial drive umbrella wheel in the middle of the main shaft drives the cooling fan at the tail end of the driven cone wheel to rotate under the transmission action of the transmission wheel, and makes the cooling fan rotate in the opposite direction to the rotating body. By accelerating the flow of air around the rotating body, the heat dissipation efficiency is improved. Finally, as the liquid in the sleeve flows into the water supply pipe through the inclined cavity, it sprays onto the rotating body and the middle of the main shaft at the same time when it flows through the spray port at the bottom of the inclined cavity, and carries away the heat. The warm water flows into the lower cavity of the sealing housing along the main shaft and is discharged from the outlet. Through the above structural design, on the one hand, the liquid can carry away the heat conducted by the main shaft while forming a water seal to prevent leakage; on the other hand, the coaxially rotating cooling fan and the water cooling effect of the sprayed water can greatly reduce the amount of heat in contact with the bearing housing, protecting the bearing from high temperature. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a cross-sectional view of the device of the present invention; Figure 3 This is a front view schematic diagram of the device of the present invention; Figure 4 This is a schematic diagram of the split structure of the device of the present invention; Figure 5 This is a schematic diagram of the air-cooled heat dissipation component structure of the present invention; Figure 6 This is a schematic diagram of the water-sealing assembly structure of the present invention; Figure 7 This is a schematic diagram of the structure of the spray water supply component of the present invention.

[0018] In the diagram: 1. Water seal assembly; 101. Sealing housing; 102. Retaining ring; 103. Main shaft; 104. Rotating body; 105. Heat dissipation fins; 106. Stepped groove; 107. Connecting port; 2. Packing seal; 3. Water outlet; 4. Impeller; 5. Casing; 6. Air-cooled heat dissipation assembly; 601. Drive umbrella wheel; 602. Transmission wheel; 603. Bracket; 604. Driven cone wheel; 605. Cooling fan; 7. Spray water supply assembly; 701. Sleeve; 702. Water inlet; 703. Water supply pipe; 704. Inclined cavity; 705. Spray nozzle. Detailed Implementation

[0019] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention. Please see Figures 1 to 6 This invention provides a technical solution: a gas blower leakage sealing device, including a water sealing assembly 1. The water sealing assembly 1 includes a sealing housing 101, a retaining ring 102, a main shaft 103, a rotating body 104, heat dissipation fins 105, a stepped groove 106, and a connecting port 107. The retaining ring 102 is fixed to the sealing housing 101 near the medium end of the sealing gas, and the main shaft 103 is axially rotatably mounted in the middle of the sealing housing 101. The retaining ring 102 is steppedly distributed along the length of the main shaft 103. The rotating body 104 is coaxially fixed to the main shaft 103 near the medium end of the sealing gas, and heat dissipation fins 105 are distributed in a conical array on the outer side of the rotating body 104. 5. The inner wall of the rotating body 104 cavity is provided with a stepped groove 106, and the stepped groove 106 cooperates with the retaining ring 102 to form a stepped labyrinth seal. A communication port 107 is formed between the end of the rotating body 104 and the retaining ring 102. A packing seal 2 is fixed at one end of the sealing housing 101 near the bearing box, and the packing seal 2 is radially covered and fastened to the outside of the main shaft 103. The bottom end of the sealing housing 101 is connected to the water outlet 3. One end of the main shaft 103 is connected to the pulley drive through the bearing box, and the other end of the main shaft 103 is tightened with an impeller 4 by a nut. The impeller 4 is embedded in the inside of the housing 5, and the rear side plate of the housing 5 is fixed to the sealing housing 101 by a flange and bolts. The specific operation is as follows: On the one hand, when the gas blower is running, the main shaft 103 will drive the rotating body 104 near the sealing gas medium end to rotate synchronously, so that the gas enters through the gap between the inner side of the retaining ring 102 and the main shaft 103, and is discharged through the stepped labyrinth seal formed by the stepped sealing teeth on the outer side of the retaining ring 102 and the stepped groove 106 on the inner wall of the rotating body 104 cavity. During this process, the throttling effect is used to achieve the purpose of preventing leakage. On the other hand, the liquid in the sleeve 701 is connected to the gap between the inner side of the retaining ring 102 and the main shaft 103 through the end water supply pipe 703. The liquid is generated by the rotation of the rotating body 104. Under the action of centrifugal force, the liquid fills the sealed cavity formed by the stepped sealing teeth on the outer side of the baffle ring 102 and the stepped groove 106 on the inner wall of the rotating body 104, thereby completely blocking the only leakage connection 107 of the gas, so that the fan achieves the purpose of zero leakage. This application achieves the purpose of zero leakage by the cooperation of the stepped sealing teeth on the outer side of the baffle ring 102 and the stepped groove 106 on the inner wall of the rotating body 104 to form a stepped labyrinth seal to achieve the purpose of leakage prevention through the throttling effect. At the same time, the liquid injection and the centrifugal force generated by the rotation of the rotating body 104 form a water seal to achieve double leakage prevention and achieve the purpose of zero leakage of the fan. Please see Figure 5 A wind-cooled heat dissipation assembly 6 is provided in the middle of the sealed housing 101. The wind-cooled heat dissipation assembly 6 includes a drive parachute wheel 601 and a transmission wheel 602. The drive parachute wheel 601 is coaxially fixed with the middle of the main shaft 103, and the transmission wheel 602 is engaged with the bottom end of one side of the drive parachute wheel 601. The wind-cooled heat dissipation assembly 6 also includes a bracket 603. The transmission wheel 602 is rotatably installed inside the bracket 603, and the two ends of the bracket 603 are welded and fixed to the bottom end of the inner wall of the sealed housing 101. The wind-cooled heat dissipation assembly 6 also includes a driven cone wheel 604 and a cooling fan 605. The driven cone wheel 602 is engaged with the driven cone wheel 604 on the other side away from the drive parachute wheel 601. The inner diameter of the driven cone wheel 604 is larger than the outer diameter of the main shaft 103, and the cooling fan 605 is fixed in an array at the tail end of the driven cone wheel 604. The specific operation is as follows: under the action of centrifugal force, the liquid forms a water seal to achieve the purpose of preventing leakage, while also absorbing the heat conducted by the main shaft 103. The heat absorbed by the liquid is first conducted to the heat dissipation fins 105 on the outer conical surface of the rotating body 104 and dissipated into the surrounding air. Secondly, the coaxial drive umbrella wheel 601 in the middle of the main shaft 103 drives the cooling fan 605 at the tail end of the driven cone wheel 604 to rotate under the transmission action of the transmission wheel 602, and makes the cooling fan 605 rotate in the opposite direction to the rotating body 104, thereby improving the heat dissipation efficiency by accelerating the flow of air around the rotating body 104. Please see Figure 7A spray water supply assembly 7 is fixed to the inner wall of the sealing housing 101. The spray water supply assembly 7 includes a sleeve 701 and a water inlet 702. The sleeve 701 is fixedly installed on the top of the inner wall of the sealing housing 101, and the top of the sleeve 701 is connected to the water inlet 702. The water inlet 702 is connected to the top of the sealing housing 101. The spray water supply assembly 7 also includes a water supply pipe 703. The end of the sleeve 701 is connected to the water supply pipe 703, and the end of the water supply pipe 703 is connected to the gap between the retaining ring 102 and the main shaft 103. The spray water supply assembly 7 also includes an inclined cavity 704 and a spray nozzle 705. An inclined cavity 704 is axially opened inside the sleeve 701, and a spray nozzle 705 is opened through the bottom end of the inclined cavity 704. The spray nozzle 705 is directly above the main shaft 103. The specific operation is as follows: during the process of the liquid in the sleeve 701 being introduced into the water supply pipe 703 through the inclined cavity 704, when it flows through the spray port 705 at the bottom of the inclined cavity 704, it will simultaneously spray onto the rotating body 104 and the middle part of the main shaft 103 and carry away the heat. The warm water flows along the main shaft 103 into the lower cavity of the sealing housing 101 and is discharged from the outlet 3. Through the above structural design, on the one hand, the liquid can carry away the heat conducted by the main shaft 103 while forming a water seal to achieve the purpose of preventing leakage. On the other hand, through the coaxially rotating opposite cooling fan 605 and the water cooling effect of the sprayed water, the amount of heat in contact with the bearing housing can be greatly reduced, protecting the bearing from the effects of high temperature.

[0020] In summary, when using this gas blower leakage sealing device, on the one hand, when the gas blower is running, the main shaft 103 drives the rotating body 104 near the sealing gas medium end to rotate synchronously, so that the gas enters through the gap between the inner side of the retaining ring 102 and the main shaft 103, and is discharged through the stepped labyrinth seal formed by the stepped sealing teeth on the outer side of the retaining ring 102 and the stepped groove 106 on the inner wall of the rotating body 104 cavity. This process achieves leakage prevention through a throttling effect. On the other hand, the liquid inside the sleeve 701 is connected to the gap between the inner side of the retaining ring 102 and the main shaft 103 via the end water supply pipe 703. During rotation... Under the centrifugal force generated by the rotation of body 104, liquid fills the sealed cavity formed by the stepped sealing teeth on the outer side of the retaining ring 102 and the stepped groove 106 on the inner wall of the rotating body 104, thereby completely blocking the only leakage connection 107 of the gas, so that the fan achieves zero leakage. This application achieves zero leakage by using the cooperation between the stepped sealing teeth on the outer side of the retaining ring 102 and the stepped groove 106 on the inner wall of the rotating body 104 to form a stepped labyrinth seal to achieve leakage prevention through the throttling effect. At the same time, the injection of liquid and the formation of a water seal under the centrifugal force generated by the rotation of the rotating body 104 achieve double leakage prevention and realize zero leakage of the fan. The purpose of the leak is that the liquid, under the action of centrifugal force, forms a water seal to prevent leakage, while also absorbing the heat conducted by the main shaft 103. The heat absorbed by the liquid is first conducted to the heat dissipation fins 105 on the outer conical surface of the rotating body 104 and dissipated into the surrounding air. Secondly, the coaxial drive umbrella wheel 601 in the middle of the main shaft 103, under the transmission action of the transmission wheel 602, drives the cooling fan 605 at the tail end of the driven conical wheel 604 to rotate, and makes the cooling fan 605 rotate in the opposite direction to the rotating body 104, thereby improving the heat dissipation efficiency by accelerating the airflow around the rotating body 104. Finally, the sleeve 70 As the liquid in 1 flows from the inclined cavity 704 into the water supply pipe 703, it simultaneously sprays onto the rotating body 104 and the middle of the main shaft 103 while passing through the spray nozzle 705 at the bottom of the inclined cavity 704, carrying away heat. The warm water flows along the main shaft 103 into the lower cavity of the sealing housing 101 and is discharged from the outlet 3. Through the above structural design, on the one hand, the liquid can carry away the heat conducted by the main shaft 103 while forming a water seal to prevent leakage. On the other hand, through the coaxially rotating opposite cooling fan 605 and the water cooling effect of the sprayed water, the amount of heat in contact with the bearing housing can be greatly reduced, protecting the bearing from high temperature.

[0021] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A gas blower leakage sealing device, comprising a water sealing assembly (1), characterized in that, The water-sealing assembly (1) includes a sealing housing (101), a retaining ring (102), a main shaft (103), a rotating body (104), heat dissipation fins (105), a stepped groove (106), and a connecting port (107). The retaining ring (102) is fixed at the medium end of the sealing housing (101) near the sealing gas, and the main shaft (103) is axially rotatably mounted in the middle of the sealing housing (101). The retaining ring (102) is steppedly distributed along the length of the main shaft (103). The rotating body (104) is coaxially fixed at the medium end of the main shaft (103) near the sealing gas, and heat dissipation fins (105) are distributed in a conical array on the outer side of the rotating body (104). The rotating body (104) is located inside the cavity of the rotating body (104). The wall is provided with a stepped groove (106), and the stepped groove (106) cooperates with the retaining ring (102) to form a stepped labyrinth seal. A communication port (107) is formed between the end of the rotating body (104) and the retaining ring (102). A wind-cooled heat dissipation assembly (6) is provided in the middle of the sealing housing (101). The wind-cooled heat dissipation assembly (6) includes a drive parachute wheel (601) and a transmission wheel (602). The drive parachute wheel (601) is coaxially fixed with the middle of the main shaft (103), and the transmission wheel (602) is engaged with the bottom end of one side of the drive parachute wheel (601). The wind-cooled heat dissipation assembly (6) also includes a bracket (603). The transmission wheel (602) is rotatably installed inside the bracket (603). The bracket (603) is welded and fixed at both ends to the bottom of the inner wall of the sealed housing (101). The air-cooled heat dissipation assembly (6) also includes a driven cone wheel (604) and a cooling fan (605). The drive wheel (602) is engaged with the driven cone wheel (604) on the other side away from the drive umbrella wheel (601). The inner diameter of the driven cone wheel (604) is larger than the outer diameter of the main shaft (103). The cooling fan (605) is fixed in an array at the tail end of the driven cone wheel (604). A spray water supply assembly (7) is fixed to the inner wall of the sealed housing (101). The spray water supply assembly (7) includes a sleeve (701) and a water inlet (702). The sleeve (701) is fixedly installed on the sealed housing (101). The inner wall top of the sleeve (701) is connected to the water inlet (702), and the water inlet (702) is connected to the top of the sealing housing (101). The spray water supply assembly (7) also includes a water supply pipe (703). The end of the sleeve (701) is connected to the water supply pipe (703), and the end of the water supply pipe (703) is connected to the gap between the retaining ring (102) and the main shaft (103). The spray water supply assembly (7) also includes an inclined cavity (704) and a spray nozzle (705). The inclined cavity (704) is axially opened inside the sleeve (701), and the bottom end of the inclined cavity (704) is through-opened with a spray nozzle (705), and the spray nozzle (705) is directly above the main shaft (103).

2. The gas blower leakage sealing device according to claim 1, characterized in that, The sealing housing (101) is fixed with a packing seal (2) near the bearing housing, and the packing seal (2) is radially covered on the outside of the main shaft (103). The bottom end of the sealing housing (101) is connected to a water outlet (3).

3. The gas blower leakage sealing device according to claim 2, characterized in that, One end of the main shaft (103) is connected to the pulley drive through the bearing box, and the other end of the main shaft (103) is tightened to the impeller (4) by the nut.

4. A gas blower leakage sealing device according to claim 3, characterized in that, The impeller (4) is embedded inside the housing (5), and the rear side plate of the housing (5) is bolted to the sealing housing (101) by a flange.

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