Shaft seal assembly

Abstract

The utility model provides a shaft seal assembly. The shaft seal assembly comprises a base; the outer ring is detachably connected with the base, and a liquid outlet is formed in the outer ring; the inner ring is matched with the outer ring in an embedded mode, and protrusions are arranged on the inner ring; the sealing piece is fixedly connected with the outer ring; the first fastener is arranged on the inner ring; the second fastener is matched with the sealing ring and the outer ring; a gap exists between the inner ring outer wall and the outer ring inner wall. The shaft seal assembly solves the problem that a shaft seal assembly in the prior art is difficult to clean and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft seals, and more specifically, to a shaft seal assembly. Background Art

[0002] The CIP cleaning system, namely the in-situ cleaning system, refers to a device system that does not disassemble equipment or components and, under closed conditions, uses a cleaning liquid with a certain temperature and concentration to strongly act on the cleaning device to clean and sterilize the surface in contact with food. It is necessary to ensure the cleanliness of nitrogen gas in the CIP cleaning agent pipeline. However, traditional shaft seal assembly parts are prone to liquid accumulation or foreign matter attachment, and are difficult to clean and maintain, which damages the service life of the shaft seal assembly and is likely to contaminate the internal cleaning gas. Content of the Utility Model

[0003] The utility model solves the problem that the shaft seal assembly is difficult to clean and maintain.

[0004] To solve the above problems, the utility model provides a shaft seal assembly, including a base, an outer ring, an inner ring, a seal, a first fastener, and a second fastener. The outer ring is detachably connected to the base, and a drain port is provided on the outer ring; the inner ring is nested with the outer ring, and a protrusion is provided on the inner ring; the seal is fixedly connected to the outer ring; the first fastener is arranged on the inner ring; the second fastener cooperates with the seal and the outer ring; there is a gap between the outer wall of the inner ring and the inner wall of the outer ring.

[0005] Compared with the prior art, the technical effects achieved by this technical solution are as follows: The base is used for connecting the shaft seal assembly to the liquid inlet / gas pipeline and can play an intermediate buffering role to prevent the liquid impact force during liquid inlet / gas from damaging the shaft seal assembly. The outer ring nests the inner ring to restrict the movement of the inner ring and fix the position of the inner ring. When installing and using the shaft seal assembly, the outer ring is connected to the base through the fixed installation part of the liquid inlet / gas pipeline. The inner ring is the core component of the shaft seal assembly. The inner ring and the outer ring are nested and matched to form a labyrinth structure. The protrusion on the inner ring can reduce the flow rate of the intruding liquid and / or the exuding liquid, thereby achieving the purpose of buffering. The seal further limits the position of the inner ring and simultaneously forms a seal on the side of the shaft seal assembly close to the liquid outlet / gas outlet to prevent the leakage of liquid / gas. The first fastener is arranged on the inner ring to fix the connection between the liquid outlet / gas pipeline and the inner ring, and the second fastener is used to fixedly install the seal. There is a gap between the outer wall of the inner ring and the inner wall of the outer ring. This gap is used to accommodate the accumulated liquid, and this gap communicates with the drain port on the outer ring, enabling the accumulated liquid to be discharged from the gap in a timely manner. At the same time, this gap also facilitates the cleaning of the shaft seal assembly, and the cleaning water after cleaning can also be smoothly discharged from the drain port, thus facilitating the cleaning and maintenance of the shaft seal assembly.

[0006] Further, the drain port is provided with a drainage structure.

[0007] Compared with the prior art, the technical effects achieved by this technical solution are as follows: The drainage structure is conducive to guiding the liquid to flow out and is not prone to residue.

[0008] Furthermore, a first rib is provided on the inner wall of the outer ring; a retaining ring is also provided on the inner ring; there is a gap between the retaining ring and the first rib.

[0009] Compared with the prior art, the technical effects achieved by this technical solution are as follows: The gap between the first rib and the retaining ring forms the first-stage labyrinth circuit. The retaining ring can withstand the liquid inlet impact, slow down the flow rate of the liquid when it enters the first-stage labyrinth circuit, restrict the backflow of the liquid entering the labyrinth circuit, and at the same time, the retaining ring can also cooperate with the first rib to restrict the axial displacement of the inner ring.

[0010] Furthermore, the protrusion includes a liquid guiding groove and a liquid blocking tooth. The liquid blocking tooth is arranged on the outer wall of the inner ring away from the first rib.

[0011] Compared with the prior art, the technical effects achieved by this technical solution are as follows: The liquid blocking tooth can restrict the further movement of the liquid along the axial direction of the inner ring, and the liquid guiding groove can guide the liquid to flow along the liquid guiding groove and finally flow to the liquid discharge port and be discharged from the liquid discharge port.

[0012] Furthermore, the liquid guiding groove is arranged between the liquid blocking tooth and the first rib.

[0013] Compared with the prior art, the technical effects achieved by this technical solution are as follows: After the liquid blocking tooth blocks the further flow of the liquid, the liquid can flow along the liquid guiding groove, and the guiding effect is good.

[0014] Furthermore, a second rib is also provided on the inner wall of the outer ring; the protrusion is located between the first rib and the second rib.

[0015] Compared with the prior art, the technical effects achieved by this technical solution are as follows: The second rib and the first rib form a certain space for accommodating the protrusion and the infiltrated liquid, strengthening the blocking and guiding effects of the protrusion on the liquid.

[0016] Furthermore, a first mounting hole is provided on the seal; a second mounting hole is also provided on the outer ring; the second fastener is nested and fitted with the first mounting hole, and the second fastener is in tight fit with the second mounting hole.

[0017] Compared with the prior art, the technical effects achieved by this technical solution are as follows: The second fastener is nested and fitted with the first mounting hole, thereby restricting the radial displacement of the seal. The second fastener is in tight fit with the second mounting hole, thereby realizing the axial fixation of the seal. The seal is installed closely against the outer ring, forming a seal on the side of the second rib away from the base, preventing the liquid flowing into the gap from seeping out. The seal can also further restrict the radial displacement of the inner ring and strengthen the connection between the inner ring and the outer ring.

[0018] Further, a fastener installation part is also provided on the inner ring; the first fastener is matched with the fastener installation part.

[0019] Compared with the prior art, the technical effects achieved by this technical solution are as follows: The first fastener is in contact with the connected liquid outlet / gas pipeline in a tightly pressing manner by being matched with the fastener installation part, thereby restricting the displacement of the liquid outlet / gas pipeline in the axial and radial directions and strengthening the connection between the liquid outlet / gas pipeline and the inner ring.

[0020] The base is provided with a third installation hole, and the outer ring is also provided with a fourth installation hole; the third installation hole and the fourth installation hole are connected by bolts.

[0021] Compared with the prior art, the technical effects achieved by this technical solution are as follows: While realizing the connection between the outer ring and the base, the externally connected liquid inlet pipeline can also be connected to the shaft seal assembly as a whole through the fourth installation hole and the third installation hole.

[0022] Further, a shaft seal assembly provided by this application further includes a sealing ring. An annular groove is provided on the inner wall of the inner ring, and the sealing ring is matched with the annular groove.

[0023] Compared with the prior art, the technical effects achieved by this technical solution are as follows: The sealing ring is arranged on the inner wall of the inner ring. When the externally connected liquid outlet / gas pipeline is connected, it can effectively seal the gap between the liquid outlet / gas pipeline and the inner ring, further enhancing the sealing performance of the assembly. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of a shaft seal assembly provided by this application;

[0025] Figure 2 It is an assembly diagram of the outer ring and the inner ring;

[0026] Figure 3 It is a partial enlarged view A of the assembly diagram of the outer ring and the inner ring;

[0027] Figure 4 It is an exploded view of a shaft seal assembly provided by this application.

[0028] Description of the Reference Numerals:

[0029] 1 - Base; 11 - Third installation hole; 2 - Outer ring; 21 - Drainage port; 210 - Drainage structure; 22 - First rib; 23 - Second rib; 24 - Second installation hole; 25 - Third installation hole; 3 - Inner ring; 31 - Protrusion; 311 - Liquid guide groove; 312 - Liquid retaining teeth; 32 - Retaining ring; 33 - Fastener installation part; 34 - Annular groove; 4 - Seal; 41 - First installation hole; 5 - First fastener; 6 - Second fastener; 7 - Sealing ring. Detailed Embodiments

[0030] The utility model aims to provide a shaft seal component, which is used to achieve the effect of making the shaft seal component easy to clean and maintain.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 As shown, the utility model provides a shaft seal assembly, including a base 1, an outer ring 2, an inner ring 3, a seal 4, a first fastener 5 and a second fastener 6. The outer ring 2 is detachably connected to the base 1, and a drain port 21 is provided on the outer ring 2; the inner ring 3 is nested with the outer ring 2, and a protrusion 31 is provided on the inner ring 3; the seal 4 is fixedly connected to the outer ring 3; the first fastener 5 is provided on the inner ring; the second fastener 6 cooperates with the seal 4 and the outer ring 3; and there is a gap between the outer wall of the inner ring 3 and the inner wall of the outer ring 2.

[0033] The base 1 is used for connecting the shaft seal assembly with the liquid inlet pipeline and the base 1 can play an intermediate buffering role to prevent the impact force of the liquid when the liquid / gas is introduced into the shaft seal assembly from damaging the shaft seal assembly. The outer ring 2 is nested in the inner ring 3 to limit the movement of the inner ring 3 and fix the position of the inner ring 3. When installing and using the shaft seal assembly, the outer ring 2 is connected to the base 1 through the fixed mounting part of the liquid inlet pipeline. The inner ring 3 is the core component of the shaft seal assembly. The inner ring 3 and the outer ring 2 are nested to form a maze structure. The protrusion 31 on the inner ring 3 can reduce the flow rate of the invading liquid and / or the seeping liquid, thereby achieving the purpose of buffering. The seal 4 further limits the position of the inner ring 3 and forms a seal on the side of the shaft seal assembly close to the liquid / gas outlet to prevent liquid leakage. The first fastener 5 is arranged on the inner ring 3 to fix the connection between the liquid / gas outlet pipeline and the inner ring 3. The second fastener 6 is used to fix the seal 4. There is a gap between the outer wall of the inner ring 3 and the inner wall of the outer ring 2, which is used to accommodate the retained liquid, and the gap is connected to the drain port 21 on the outer ring 2, so that the retained liquid can be discharged from the gap in time. At the same time, the gap also facilitates the cleaning of the shaft seal assembly, and the cleaning water after cleaning can also be smoothly discharged from the drain port 21, which is beneficial to the cleaning and maintenance of the shaft seal assembly.

[0034] Specifically, in this embodiment, the shaft seal assembly used in this application is mainly used for cleaning the fan and is connected to the clean nitrogen pipeline to prevent foreign matter / liquid from entering the pipeline, thereby keeping the nitrogen in the nitrogen pipeline clean and allowing the nitrogen to smoothly clean the inside of the fan. However, the shaft seal assembly provided in this application can also be used in working scenarios of liquid pipelines.

[0035] like Figure 2 As shown, the drain port 21 is provided with a drainage structure 210 .

[0036] Specifically, in this embodiment, the liquid discharge port 21 is disposed on the inner wall of the outer ring 2 close to the liquid inlet pipeline, and the liquid discharge port 21 is communicated with the gap between the outer ring 2 and the inner ring 3 .

[0037] In this embodiment, the drainage structure 210 is specifically an inclined slope structure with an arc-shaped depression, which slopes from the gap between the outer ring 2 and the inner ring 3 towards the outer edge of the outer ring 2.

[0038] The drainage structure 210 is conducive to guiding the liquid to flow out and is not easy to remain. When installing and using a shaft seal assembly provided by the present application, the drainage structure 210 is installed with a positive inclination towards the ground, and the internal liquid can flow towards the liquid discharge port 21 under the action of gravity, and the liquid discharge and drainage effect is the best.

[0039] Continue to refer to Figure 2 , a first rib 22 is provided on the inner wall of the outer ring 2; a retaining ring 32 is also provided on the inner ring 3; there is a gap between the retaining ring 32 and the first rib 22.

[0040] On the outer ring 2, on the side close to the connection of the liquid inlet pipeline, there is also an annular inclined surface structure that is connected to the first rib 22 and slopes towards the outer edge of the outer ring 2. The retaining ring 32 also has an inclined surface structure, so that the retaining ring 32 can cooperate with the outer ring 2 to form a zigzag annular gap, constituting the first labyrinth circuit.

[0041] Specifically, the first rib 22 is provided on the inner wall of the outer ring 2 close to the base 1.

[0042] The gap between the first rib 22 and the retaining ring 32 forms the first stage of the labyrinth circuit. The retaining ring 32 can withstand the impact of the incoming liquid, slow down the flow rate of the liquid when it enters the first stage of the labyrinth circuit, limit the backflow of the liquid entering the labyrinth circuit, and at the same time, the retaining ring 32 can also cooperate with the first rib 22 to limit the axial displacement of the inner ring 3.

[0043] As Figure 3 shown, the protrusion 31 includes a liquid guiding groove 311 and a liquid blocking tooth 312. The liquid blocking tooth 312 is provided on the outer wall of the inner ring 3 away from the first rib 22.

[0044] The liquid blocking tooth 312 is higher than the liquid guiding groove 311, and the side of the liquid blocking tooth 312 close to the first rib 22 is a vertical plane, which can effectively block the incoming liquid and make the liquid enter the liquid guiding groove 311. The side of the liquid blocking tooth 312 away from the first rib 22 has an inclined surface structure, which can guide the residual liquid that has not been blocked in time to the surface of the inner ring 3, and then flow along the outer wall of the inner ring 3 to the liquid discharge port 21.

[0045] The liquid blocking tooth 312 can limit the further movement of the liquid along the axis of the inner ring 3, and the liquid guiding groove 311 can guide the liquid to flow along the liquid guiding groove 311, and finally flow out from the liquid discharge port 21 through the liquid discharge port 21.

[0046] Refer to again Figure 3 , the liquid guiding groove 311 is provided between the liquid blocking tooth 312 and the first rib 22.

[0047] In this embodiment, the liquid guide groove 311 is composed of three adjacent annular grooves with protrusions between them, which can disperse the liquid and enable the liquid to flow along the liquid guide groove 311 to the liquid discharge port 21 more quickly.

[0048] After the liquid blocking teeth 312 block the further flow of the liquid, the liquid can flow along the liquid guide groove 311, and the guiding effect is good.

[0049] As Figure 3 shown, a second rib 23 is further provided on the inner wall of the outer ring 2; the protrusion 31 is located between the first rib 22 and the second rib 23.

[0050] The second rib 23 and the first rib 22 form a certain space for accommodating the protrusion 31 and the infiltrating liquid, strengthening the blocking and guiding effects of the protrusion 31 on the liquid.

[0051] As Figure 1 and Figure 4 shown, a first mounting hole 41 is provided on the seal 4; a second mounting hole 24 is further provided on the outer ring 2; the second fastener 6 is nested with the first mounting hole 41, and the second fastener 6 is in tight contact with the second mounting hole 24.

[0052] In this embodiment, the second fastener 6 is specifically a bolt. The first mounting hole 41 is a through hole, and the second mounting hole 24 is a non-through threaded hole on the outer ring 2.

[0053] The second fastener 6 is nested with the first mounting hole 41, thereby restricting the radial displacement of the seal 4. The second fastener 6 is in tight contact with the second mounting hole 24, thereby realizing the axial fixation of the seal 4. The seal 4 is installed close to the outer ring 2 to form a seal on the side of the second rib 23 away from the base 1, preventing the liquid flowing into the gap from leaking out. The seal 4 can also further restrict the radial displacement of the inner ring 3 and strengthen the connection between the inner ring 3 and the outer ring 2.

[0054] Referring again to Figure 1 and Figure 4 , a fastener mounting portion 33 is further provided on the inner ring 3; the first fastener 5 is engaged with the fastener mounting portion 33.

[0055] In this embodiment, the first fastener 5 is specifically a set screw. The fastener mounting portion 33 is specifically provided on the inner ring 3 away from the retaining ring 32, and the fastener mounting portion 33 is a through hole on the inner ring 3.

[0056] In this embodiment, there are two fastener mounting portions 33, and the included angle between the perpendicular connection lines of the two fastener mounting portions 33 and the axis of the inner ring 3 is a right angle. The liquid discharge / gas pipeline is fixed by abutting against the liquid discharge / gas pipeline from two mutually perpendicular directions.

[0057] The first fastener 5 is in tight contact with the accessed liquid / gas outlet pipeline by cooperating with the fastener installation part 33, thereby restricting the displacement of the liquid / gas outlet pipeline in the axial and radial directions and strengthening the connection between the liquid / gas outlet pipeline and the inner ring 3.

[0058] As Figure 4 shown, the base 1 is provided with a third mounting hole 11, and the outer ring 2 is further provided with a fourth mounting hole 25; the third mounting hole 11 and the fourth mounting hole 25 are connected by bolts.

[0059] While connecting the outer ring 2 and the base 1, the externally connected liquid inlet pipeline can also be connected to the shaft seal assembly as a whole through the fourth mounting hole 25 and the third mounting hole 11.

[0060] Referring again to Figure 4 , a shaft seal assembly provided by the present application further includes a seal ring 7. An annular groove 34 is provided on the inner wall of the inner ring 3, and the seal ring 7 cooperates with the annular groove 34.

[0061] Specifically, in this embodiment, the seal ring 7 is made of silica gel.

[0062] The seal ring 7 is arranged on the inner wall of the inner ring 3. When the externally connected liquid / gas outlet pipeline is accessed, it can effectively seal the gap between the liquid / gas outlet pipeline and the inner ring 3, further enhancing the sealing performance of the assembly.

[0063] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A shaft seal assembly, characterized in that: include: Base; An outer ring is detachably connected to the base, and a liquid discharge port is provided on the outer ring; An inner ring, nested with the outer ring, and provided with a protrusion; A sealing member, fixedly connected to the outer ring; A first fastener, disposed on the inner ring; a second fastener, cooperating with the sealing member and the outer ring; There is a gap between the inner ring outer wall and the outer ring inner wall.

2. The shaft seal assembly according to claim 1, characterized in that: The liquid discharge port is provided with a drainage structure.

3. The shaft seal assembly according to claim 2, characterized in that: The inner wall of the outer ring is provided with a first convex rib; The inner ring is also provided with a retaining ring; There is a gap between the retaining ring and the first rib.

4. The shaft seal assembly according to claim 3, characterized in that: The protrusions include: Liquid guide groove; The liquid-blocking tooth is arranged on the outer wall of the inner ring away from the first rib.

5. The shaft seal assembly according to claim 4, characterized in that: The liquid guiding groove is arranged between the liquid blocking teeth and the first convex rib.

6. The shaft seal assembly according to claim 5, characterized in that: The inner wall of the outer ring is also provided with a second convex rib; The protrusion is located between the first rib and the second rib.

7. The shaft seal assembly according to claim 6, characterized in that: The sealing member is provided with a first mounting hole; The outer ring is also provided with a second mounting hole; The second fastener and the first mounting hole are nested and matched, and the second fastener and the second mounting hole are tightly matched.

8. The shaft seal assembly according to claim 7, characterized in that: The inner ring is also provided with a fastener mounting portion; The first fastener cooperates with the fastener mounting portion.

9. The shaft seal assembly according to claim 8, characterized in that: The base is provided with a third mounting hole; The outer ring is also provided with a fourth mounting hole; The third mounting hole and the fourth mounting hole are connected by bolts.

10. The shaft seal assembly according to any one of claims 1 to 9, characterized in that: The shaft seal assembly also includes: Sealing ring; An annular groove is provided on the inner wall of the inner ring; The sealing ring cooperates with the annular groove.

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