A high-temperature-resistant shaft seal structure

Abstract

The utility model discloses a kind of high-temperature-resistant shaft sealing structures, more specifically to shaft sealing technical field, including fixed shaft, the outer wall of fixed shaft is sleeved with isolating tube, the inside both ends of isolating tube are provided with outer collar, the side of fixed shaft outer wall close to outer collar is uniformly fixedly connected with helical fin;The side of fixed shaft outer wall both ends close to outer collar is uniformly fixedly connected with inner collar, and the side of inner collar close to outer collar is rotatably connected with multiple rolling columns;The helical direction of the helical fin of fixed shaft both ends is opposite, the outer wall of helical fin is sleeved with heat pipe, and the inner wall of heat pipe both ends is fixedly connected with outer collar outer wall;The side center of isolating tube is fixedly connected with liquid outlet pipe and penetrates, and the side both ends of isolating tube close to liquid outlet pipe are fixedly connected with liquid inlet pipe and penetrate.The utility model has the advantages of convenient conveying coolant, higher cooling efficiency.

Description

Technical Field

[0001] This utility model relates to the field of shaft sealing technology, specifically to a high-temperature resistant shaft sealing structure. Background Technology

[0002] The sealing bushing is fitted onto the main shaft to seal it. Most existing sealing bushings adopt a mechanical seal structure. The mechanical seal structure can seal the medium and the rotating shaft, preventing the medium from leaking from the rotating shaft. Some sealing structures need to be used in high-temperature environments, so additional protection is required to achieve high-temperature resistance.

[0003] A high-temperature resistant magnetohydrodynamic (MHD) sealing device with large axial load is disclosed in CN116518083A. It includes a housing, within which a main shaft is rotatably mounted, and a MHD sealing assembly is positioned between the main shaft and the housing. It also includes a cooling section, with a flow inlet on the housing and a flow outlet on the opposite side of the flow inlet. Both the flow inlet and flow outlet are connected to the cooling section. A gap is provided between the MHD sealing assembly and the main shaft or housing. The cooling section, flow outlet, flow inlet, and gap form a continuous circuit. A first deep groove ball bearing and a second deep groove ball bearing are respectively mounted on both sides of the MHD sealing assembly, and a thrust ball bearing is mounted on one side of the second deep groove ball bearing. Addressing the technical problems of poor temperature adaptability and ineffective rotation in traditional structures, this improvement enhances the high-temperature resistance of the MHD, increases axial load capacity, reduces maintenance frequency, and extends the overall service life.

[0004] The aforementioned existing patents have some defects in use. The liquid is only cooled in the middle part, and the bearing structure components on both sides cannot conduct heat well. The bearings on both sides generate a lot of heat when rotating, resulting in poor cooling effect. At the same time, the liquid cannot flow freely inside the device and requires external equipment to drive it, which is inconvenient. In addition, the magnetic fluid sealing component lacks internal gaps, which can easily create liquid flow channels during use, resulting in poor liquid flow at the edges and corners, leading to poor heat dissipation. Utility Model Content

[0005] The purpose of this invention is to provide a high-temperature resistant shaft seal structure that solves the problems of poor heat dissipation, inconvenient liquid flow at corners, and the need for an external drive device in existing shaft seal structures.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature resistant shaft sealing structure, including a fixed shaft, an isolation tube sleeved on the outer wall of the fixed shaft, an outer shaft ring provided at both ends of the inner side of the isolation tube, and a spiral blade fixedly connected to the side of the outer wall of the fixed shaft near the outer shaft ring;

[0007] Both ends of the outer wall of the fixed shaft are fixedly connected to an inner shaft ring on the side near the outer shaft ring, and multiple rolling columns are rotatably connected to the side of the inner shaft ring near the outer shaft ring.

[0008] The spiral blades at both ends of the fixed shaft have opposite spiral directions. A heat-conducting tube is sleeved on the outer wall of the spiral blade, and the inner walls of both ends of the heat-conducting tube are fixedly connected to the outer wall of the outer shaft ring.

[0009] An outlet pipe is fixedly connected through the center of one side of the isolation tube, and inlet pipes are fixedly connected through both ends of the isolation tube near the outlet pipe.

[0010] Preferably, sealing rings are fixedly connected to both ends of the outer wall of the fixed shaft near the isolation tube, and the outer wall of the sealing rings is rotatably connected to the inner ends of the heat-conducting tube.

[0011] Preferably, both ends of the isolation tube are fixedly connected to flange rings, the sidewall at the center of the flange ring is fixedly connected to both ends of the heat-conducting tube, and one end of the liquid outlet tube penetrates the sidewall of the heat-conducting tube and communicates with the inside of the heat-conducting tube.

[0012] Preferably, the inner wall of the outer ring near the spiral blade is inclined towards the outer wall, and the inclined surface of the outer ring has a plurality of receiving grooves that are rotatably connected to the rolling column. The inner ring near the rolling column has an inclined surface corresponding to the outer ring, and the inclined surface of the inner ring has a receiving groove corresponding to the rolling column.

[0013] Preferably, both ends of the heat pipe are provided with connecting holes near the spiral blades, and coolant is provided inside and outside the spiral blades.

[0014] Preferably, the position of the inlet pipe corresponds to the position of the outer ring, and both the outlet pipe and the inlet pipe are equipped with a one-way valve, and the outer wall of the isolation pipe is provided with a heat insulation coating.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] 1. The fixed shaft drives the spiral blades to rotate, which can transport the liquid from both ends of the isolation tube to both ends of the heat pipe through the connecting hole. This causes the spiral blades to move the coolant from both ends towards the center, allowing the liquid to be discharged through the outlet pipe. At the same time, it can also transport external coolant to both ends of the isolation tube through the inlet pipe, thus realizing the circulation of coolant. No external driving device is required, making the coolant flow more convenient. In addition, the rotation of the spiral blades can fully drive the liquid flow at both ends of the heat pipe, avoiding the situation where the liquid cannot circulate at the corners.

[0017] 2. The coolant inside the heat pipe can adhere to the side wall of the inner ring, thereby effectively cooling the inner ring. At the same time, since the outer ring is fixedly connected to the heat pipe, heat is effectively transferred through the heat pipe. In addition, coolant is placed at both ends of the heat pipe near the outer wall of the outer ring, which can further cool and dissipate heat from the outer ring, thereby effectively improving the cooling efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the isolation tube of this utility model;

[0021] Figure 3 This is a front cross-sectional view of the internal structure of the heat pipe of this utility model;

[0022] Figure 4 This is a schematic diagram of the external connection structure of the fixed shaft of this utility model;

[0023] Figure 5 This is a schematic diagram of the connection structure between the outer and inner shaft rings of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Fixed shaft; 101. Sealing ring; 102. Flange ring; 2. Isolation tube; 201. Liquid outlet tube; 202. Liquid inlet tube; 3. Outer shaft ring; 301. Inner shaft ring; 302. Rolling column; 4. Spiral blade; 401. Heat conduction tube; 402. Connecting hole. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model provides, for example Figure 1-5The high-temperature resistant shaft seal structure shown includes a fixed shaft 1, an isolation tube 2 sleeved on the outer wall of the fixed shaft 1, an outer shaft ring 3 at both ends of the inner side of the isolation tube 2, and a spiral blade 4 fixedly connected to the outer wall of the fixed shaft 1 near the outer shaft ring 3; an inner shaft ring 301 fixedly connected to both ends of the outer wall of the fixed shaft 1 near the outer shaft ring 3, and multiple rolling columns 302 rotatably connected to the inner shaft ring 301 near the outer shaft ring 3; the spiral blades 4 at both ends of the fixed shaft 1 have opposite spiral directions, and a heat-conducting tube 401 is sleeved on the outer wall of the spiral blade 4, with the inner walls of both ends of the heat-conducting tube 401 fixedly connected to the outer wall of the outer shaft ring 3; an outlet pipe 201 is fixedly connected through the center of one side of the isolation tube 2, and an inlet pipe 202 is fixedly connected through both ends of the isolation tube 2 near the outlet pipe 201.

[0028] like Figure 2 , Figure 3 As shown, sealing rings 101 are fixedly connected to both ends of the outer wall of the fixed shaft 1 near the isolation tube 2. The outer wall of the sealing rings 101 is rotatably connected to the inner ends of the heat-conducting tube 401. Flange rings 102 are fixedly connected to both ends of the isolation tube 2. The side wall at the center of the flange rings 102 is fixedly connected to both ends of the heat-conducting tube 401. One end of the liquid outlet pipe 201 penetrates the side wall of the heat-conducting tube 401 and communicates with the inside of the heat-conducting tube 401. A connecting hole 402 is opened at both ends of the heat-conducting tube 4 near the spiral blade 4. Coolant is provided on both sides. The spiral blade 4 drives the coolant at both ends to move towards the center inside, so that the liquid is discharged through the outlet pipe 201. At the same time, the external coolant can also be transported to both ends inside the isolation pipe 2 through the inlet pipe 202, thus realizing the circulation of coolant. No external driving device is required to drive it, and the coolant flow is more convenient. At the same time, the rotation of the spiral blade 4 can fully drive the liquid flow at both ends inside the heat conduction pipe 401, avoiding the situation where the liquid cannot circulate at the corner.

[0029] like Figure 4 , Figure 5As shown, the inner wall of the outer ring 3 near the spiral blade 4 is inclined towards the outer wall. The inclined surface of the outer ring 3 has multiple receiving grooves that are rotatably connected to the rolling column 302. The inner ring 301 near the rolling column 302 has an inclined surface corresponding to the outer ring 3. The inclined surface of the inner ring 301 has receiving grooves corresponding to the rolling column 302. The position of the liquid inlet pipe 202 corresponds to the position of the outer ring 3. Both the liquid outlet pipe 201 and the liquid inlet pipe 202 are equipped with one-way valves. The outer wall of the isolation pipe 2 is coated with a heat insulation coating. The coolant inside the heat conduction pipe 401 can adhere to the side wall of the inner ring 301, thereby effectively cooling the inner ring 301. At the same time, since the outer ring 3 is fixedly connected to the heat conduction pipe 401, heat is effectively transferred through the heat conduction pipe 401. At the same time, the two ends of the heat conduction pipe 401 are equipped with coolant near the outer wall of the outer ring 3, which can further cool and dissipate heat from the outer ring 3 through the coolant.

[0030] During use, the flange ring 102 can be easily fixed to the corresponding equipment, and the fixed shaft 1 can be connected to the drive device to fix the device. The fixed shaft 1 can be rotated, thereby driving the spiral blade 4 to rotate, so that the liquid flows. The liquid at both ends of the isolation tube 2 can be transported to both ends of the heat conduction tube 401 through the connecting hole 402. Then, the spiral blade 4 drives the coolant at both ends to move towards the center of the inside, so that the liquid is discharged through the outlet pipe 201. At the same time, the external coolant can be transported to both ends of the isolation tube 2 through the inlet pipe 202, thus realizing the circulation of coolant. No external drive device is required to push it, and the coolant flow is more convenient. At the same time, the rotation of the spiral blade 4 can fully drive the liquid flow at both ends of the heat conduction tube 401, avoiding the situation where the liquid cannot circulate at the corner.

[0031] During use, the fixed shaft 1 rotates, and the inner ring 301 on the outer wall of the fixed shaft 1 is rotatably connected to the outer ring 3 through the rolling column 302. This causes both the outer ring 3 and the inner ring 301 to generate heat, allowing the coolant inside the heat pipe 401 to adhere to the side wall of the inner ring 301, thus effectively cooling the inner ring 301. At the same time, since the outer ring 3 is fixedly connected to the heat pipe 401, heat is effectively transferred through the heat pipe 401. Additionally, coolant is placed at both ends of the heat pipe 401 near the outer wall of the outer ring 3, which further cools and dissipates heat from the outer ring 3, thereby effectively improving cooling efficiency.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-temperature resistant shaft seal structure, comprising a fixed shaft (1), characterized in that: The outer wall of the fixed shaft (1) is fitted with an isolation tube (2), and both ends of the isolation tube (2) are provided with an outer shaft ring (3). The outer wall of the fixed shaft (1) near the outer shaft ring (3) is fixedly connected with a spiral blade (4). Both ends of the outer wall of the fixed shaft (1) are fixedly connected to an inner shaft ring (301) on the side near the outer shaft ring (3), and multiple rolling columns (302) are rotatably connected to the side of the inner shaft ring (301) near the outer shaft ring (3). The spiral blades (4) at both ends of the fixed shaft (1) have opposite spiral directions. The outer wall of the spiral blade (4) is fitted with a heat-conducting tube (401), and the inner walls of both ends of the heat-conducting tube (401) are fixedly connected to the outer wall of the outer shaft ring (3). An outlet pipe (201) is fixedly connected through one side of the isolation pipe (2), and inlet pipes (202) are fixedly connected through both ends of the isolation pipe (2) near the outlet pipe (201).

2. The high-temperature resistant shaft seal structure according to claim 1, characterized in that: The outer wall of the fixed shaft (1) is fixedly connected to both ends of the isolation tube (2) with sealing rings (101), and the outer wall of the sealing rings (101) is rotatably connected to the two ends of the heat-conducting tube (401).

3. The high-temperature resistant shaft seal structure according to claim 1, characterized in that: Both ends of the isolation tube (2) are fixedly connected to flange rings (102). The side wall at the center of the flange ring (102) is fixedly connected to both ends of the heat-conducting tube (401). One end of the liquid outlet tube (201) passes through the side wall of the heat-conducting tube (401) and communicates with the inside of the heat-conducting tube (401).

4. The high-temperature resistant shaft seal structure according to claim 1, characterized in that: The inner wall of the outer ring (3) near the spiral blade (4) is inclined towards the outer wall. The inclined surface of the outer ring (3) is provided with a plurality of receiving grooves that are rotatably connected to the rolling column (302). The inner ring (301) near the rolling column (302) is provided with an inclined surface corresponding to the outer ring (3). The inclined surface of the inner ring (301) is provided with a receiving groove corresponding to the rolling column (302).

5. The high-temperature resistant shaft seal structure according to claim 1, characterized in that: Both ends of the heat pipe (401) are provided with connecting holes (402) near the end of the spiral blade (4), and coolant is provided inside and outside the spiral blade (4).

6. The high-temperature resistant shaft seal structure according to claim 1, characterized in that: The position of the inlet pipe (202) corresponds to the position of the outer shaft ring (3). Both the outlet pipe (201) and the inlet pipe (202) are equipped with one-way valves. The outer wall of the isolation pipe (2) is provided with a heat insulation coating.

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