A composite shaft seal

Abstract

The utility model relates to the technical field of shaft seal, specifically relates to a composite shaft seal, including the seal seat, the seal seat is opened the seal axle hole through its both ends in, the seal seat one end is connected with the gas seal mounting seat, the gas seal mounting seat is opened the gas seal axle hole with the seal axle hole alignment, the seal axle hole and the gas seal axle hole are rotatory and are equipped with the same rotating shaft, the seal axle hole is close to the one end hole wall of gas seal axle hole and is surrounded and is equipped with the installation groove, is equipped with the sealing assembly in the installation groove around rotating shaft, the one end hole wall of gas seal axle hole is away from the sealing assembly and is surrounded and is equipped with the lip seal, the lip tip of lip seal and rotating shaft outside closely fits, is surrounded and is equipped with the gas seal cavity between lip seal, gas seal mounting seat, rotating shaft and sealing assembly, is equipped with the gas joint with gas seal cavity intercommunication on the seal seat outside wall, injects the compressed air in the gas seal cavity through the gas joint, is shot in the equipment through the gap between the packing seal and rotating shaft, prevents the material and flows through the gap between the packing seal and rotating shaft.

Description

Technical Field

[0001] This utility model relates to the field of shaft seal technology, specifically to a composite shaft seal. Background Technology

[0002] The function of a shaft seal is to seal the gap between a rotating component (rotating shaft) and a stationary component (housing), preventing the medium inside the housing from leaking to the outside through the gap between the rotating and stationary components, thus ensuring the smooth operation of the corresponding processes in the production process. As a type of shaft seal structure, mechanical seals are key components in industrial equipment to prevent fluid leakage and play a vital role in various rotating equipment such as pumps, compressors, and agitators. However, during use, mechanical seals are prone to seal failure when the sealing material undergoes thermal deformation or accelerated wear, affecting the smooth operation of the corresponding processes in the production process. Utility Model Content

[0003] The purpose of this invention is to provide a composite shaft seal that solves the problem that in the use of existing mechanical seals, the sealing material undergoes thermal deformation or accelerated wear, which can easily lead to seal failure and affect the smooth operation of corresponding processes in the production process.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A composite shaft seal includes a sealing seat with a sealing shaft hole extending through both ends along its axis. One end of the sealing seat is connected to a gas seal mounting seat. The gas seal mounting seat has a gas seal shaft hole extending through both ends and aligned with the sealing shaft hole along its axis. The same rotating shaft is rotatably connected within the sealing shaft hole and the gas seal shaft hole. A mounting groove is formed on the end wall of the sealing shaft hole near the gas seal shaft hole. A sealing assembly is arranged around the rotating shaft within the mounting groove. A lip seal is formed on the end wall of the gas seal shaft hole away from the sealing assembly. The lip tip of the lip seal is tightly fitted to the outer side of the rotating shaft, so that a gas seal cavity is formed between the lip seal, the gas seal mounting seat, the rotating shaft, and the sealing assembly. A gas connector communicating with the gas seal cavity is provided on the outer wall of the gas seal mounting seat.

[0006] A further technical solution is that an abutment ring groove is formed on the end wall of the air seal shaft hole near the sealing shaft hole. The sealing assembly includes a packing seal and a packing pressure ring. The packing seal is enclosed in the mounting groove, and the packing pressure ring is located between the mounting groove and the abutment ring groove, so that the packing seal fits tightly with the rotating shaft.

[0007] A further technical solution is that an air seal cloth ring is provided on the wall of the air seal shaft hole located in the air seal cavity. The outer ring side of the air seal cloth ring is fixedly connected to the wall of the air seal shaft hole. An air inlet ring groove and an air distribution ring groove are respectively provided on the outer ring side and the inner ring side of the air seal cloth ring. The gas connector is connected to the air inlet ring groove. Ventilation holes are provided in a ring array on the bottom of the air inlet ring groove.

[0008] A further technical solution is that a limiting ring is provided on the end wall of the air seal shaft hole away from the sealing seat, and the two ends of the lip seal abut against the limiting ring and the air seal cloth air ring respectively, and the end of the packing pressure ring away from the packing seal abuts against the end of the air seal cloth air ring.

[0009] A further technical solution is that an installation ring is provided on the outer wall of the end of the sealing seat away from the gas seal mounting seat, and threaded holes penetrating both ends of the installation ring are provided in a ring array on the installation ring.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] In use, this invention, by setting a sealing component and a lip seal, can ensure that material does not overflow through the gap between the rotating shaft and the sealing seat when the rotating shaft is rotating. When the sealing component is worn or deformed, a gap may exist between the packing seal and the rotating shaft. At this time, compressed air is injected into the air-sealing cavity through the gas connector. After the compressed air enters the air-sealing cavity, it is shot into the equipment through the gap between the packing seal and the rotating shaft, preventing material from flowing through the gap between the packing seal and the rotating shaft, thereby effectively preventing material leakage. The lip seal can prevent compressed air from leaking out, and at the same time, it can also prevent the leakage of material that has leaked into the air-sealing cavity. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a composite shaft seal structure according to the present invention.

[0013] Figure 2 This is a cross-sectional view of a composite shaft seal according to the present invention.

[0014] Figure 3 This is a schematic diagram of the gas seal cloth gas ring structure of this utility model.

[0015] Icons: 1-Sealing seat, 2-Sealing shaft hole, 3-Gas seal mounting seat, 4-Gas seal shaft hole, 5-Rotating shaft, 6-Mounting groove, 7-Lip seal, 8-Gas seal cavity, 9-Gas connector, 10-Abutment ring groove, 11-Packing seal, 12-Packing pressure ring, 13-Gas seal air distribution ring, 14-Inlet ring groove, 15-Air distribution ring groove, 16-Vent hole, 17-Limiting ring, 18-Mounting ring, 19-Threaded hole. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Reference Figures 1 to 2 The present invention discloses a composite shaft seal, comprising a sealing seat 1, with sealing shaft holes 2 extending through both ends of the sealing seat 1 along its axis. One end of the sealing seat 1 is connected to a gas seal mounting seat 3. The gas seal mounting seat 3 can be connected to the sealing seat 1 by bolts, a common technical knowledge for those skilled in the art, and the corresponding installation relationship and structure can be directly obtained based on this common knowledge. The gas seal mounting seat 3 has gas seal shaft holes 4 extending through both ends and aligned with the sealing shaft holes 2 along its axis. The same rotating shaft 5 is rotatably provided inside the air seal shaft hole 4. The sealing shaft hole 2 is surrounded by a mounting groove 6 on the end wall near the air seal shaft hole 4. A sealing assembly is provided around the rotating shaft 5 in the mounting groove 6. A lip seal 7 is surrounded on the end wall of the air seal shaft hole 4 away from the sealing assembly. The lip tip of the lip seal 7 is tightly fitted with the outer side of the rotating shaft 5, so that an air seal cavity 8 is surrounded between the lip seal 7, the air seal mounting seat 3, the rotating shaft 5 and the sealing assembly. A gas connector 9 connected to the air seal cavity 8 is provided on the outer wall of the air seal mounting seat 3.

[0018] Specifically, during use, the sealing seat 1 is installed on the outer wall of the corresponding equipment. By setting the sealing assembly and the lip seal 7, it can be ensured that when the rotating shaft 5 rotates, the material is prevented from overflowing through the gap between the rotating shaft 5 and the sealing seat 1. When the sealing assembly is worn or deformed, a gap exists between the packing seal 11 and the rotating shaft 5. At this time, compressed air is injected into the air sealing cavity 8 through the gas connector 9. After the compressed air enters the air sealing cavity 8, it is shot into the equipment through the gap between the packing seal 11 and the rotating shaft 5, preventing the material from flowing through the gap between the packing seal 11 and the rotating shaft 5, thereby effectively preventing the leakage of the material. The lip seal 7 can prevent the compressed air from leaking out, and at the same time, it can also prevent the material leaking into the air sealing cavity 8 from leaking out.

[0019] Example 2

[0020] Based on the aforementioned Example 1, see [link / reference] Figures 1 to 3 As shown, the air seal shaft hole 4 has an abutment ring groove 10 enclosed on one end of the hole wall near the sealing shaft hole 2. The sealing assembly includes a packing seal 11 and a packing pressure ring 12. The packing seal 11 is enclosed in the mounting groove 6, and the packing pressure ring 12 is located between the mounting groove 6 and the abutment ring groove 10, so that the packing seal 11 is tightly fitted with the rotating shaft 5.

[0021] As a preferred implementation method, see [link / reference] Figures 1 to 3As shown, an air sealing cloth ring 13 is provided on the wall of the air sealing shaft hole 4 located in the air sealing cavity 8. The outer ring side of the air sealing cloth ring 13 is fixedly connected to the wall of the air sealing shaft hole 4. An air inlet ring groove 14 and an air distribution ring groove 15 are respectively provided on the outer ring side and the inner ring side of the air sealing cloth ring 13. The gas connector 9 is connected to the air inlet ring groove 14. The bottom of the air inlet ring groove 14 is provided with vent holes 16 arranged in a ring array. Specifically, by setting the air inlet ring groove 14, the air distribution ring groove 15 and the vent holes 16, the compressed air is evenly distributed in the air sealing cavity 8 and then injected into the equipment through the gap between the packing seal 11 and the rotating shaft 5, preventing the material from flowing through the gap between the packing seal 11 and the rotating shaft 5, thereby effectively preventing the leakage of the material.

[0022] As a preferred implementation method, see [link / reference] Figures 1 to 3 As shown, a limiting ring 17 is provided on the end wall of the air seal shaft hole 4 away from the sealing seat 1. The two ends of the lip seal 7 abut against the limiting ring 17 and the air seal cloth air ring 13, respectively. The end of the packing pressure ring 12 away from the packing seal 11 abuts against the end of the air seal cloth air ring 13. This can limit the lip seal 7, the air seal cloth air ring 13, the packing seal 11 and the packing pressure ring 12, thereby improving the stability of the device.

[0023] Example 3

[0024] Based on the aforementioned Example 1, see [link / reference] Figures 1 to 3 As shown, an installation ring 18 is provided on the outer side wall of the end of the sealing seat 1 away from the gas seal mounting seat 3. The installation ring 18 has threaded holes 19 arranged in a ring array through both ends. Specifically, by providing the installation ring 18 and the threaded holes 19, it is convenient to install the device on the corresponding equipment.

[0025] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A composite shaft seal, comprising a sealing seat (1), wherein a sealing shaft hole (2) is formed inside the sealing seat (1) along its axis, penetrating both ends thereof, characterized in that: One end of the sealing seat (1) is connected to the gas seal mounting seat (3). The gas seal mounting seat (3) has a gas seal shaft hole (4) that passes through both ends of the seat and is aligned with the sealing shaft hole (2). The same rotating shaft (5) is rotatably connected in the sealing shaft hole (2) and the gas seal shaft hole (4). The sealing shaft hole (2) is surrounded by a mounting groove (6) on the end wall of the hole near the gas seal shaft hole (4). A sealing component is provided around the rotating shaft (5) in the mounting groove (6). A lip seal (7) is surrounded on the end wall of the gas seal shaft hole (4) away from the sealing component. The lip tip of the lip seal (7) is tightly fitted to the outside of the rotating shaft (5) so that a gas seal cavity (8) is formed between the lip seal (7), the gas seal mounting seat (3), the rotating shaft (5), and the sealing component. A gas connector (9) connected to the gas seal cavity (8) is provided on the outer wall of the gas seal mounting seat (3).

2. The composite shaft seal according to claim 1, characterized in that: The air seal shaft hole (4) has an abutment ring groove (10) enclosed on one end of the hole wall near the sealing shaft hole (2). The sealing assembly includes a packing seal (11) and a packing ring (12). The packing seal (11) is enclosed in the mounting groove (6), and the packing ring (12) is located between the mounting groove (6) and the abutment ring groove (10) so that the packing seal (11) fits tightly with the rotating shaft (5).

3. A composite shaft seal according to claim 2, characterized in that: The air seal shaft hole (4) is located in the air seal cavity (8) and an air seal cloth ring (13) is provided on the hole wall. The outer ring side of the air seal cloth ring (13) is fixedly connected to the hole wall of the air seal shaft hole (4). An air inlet ring groove (14) and an air distribution ring groove (15) are respectively provided on the outer ring side and the inner ring side of the air seal cloth ring (13). The gas connector (9) is connected to the air inlet ring groove (14). A ventilation hole (16) is provided in a ring array on the bottom of the air inlet ring groove (14).

4. A composite shaft seal according to claim 3, characterized in that: A limiting ring (17) is provided on the end wall of the air seal shaft hole (4) away from the sealing seat (1). The two ends of the lip seal (7) abut against the limiting ring (17) and the air seal cloth air ring (13) respectively. The end of the packing pressure ring (12) away from the packing seal (11) abuts against the end of the air seal cloth air ring (13).

5. A composite shaft seal according to claim 1, characterized in that: An installation ring (18) is provided on the outer side wall of the sealing seat (1) away from the gas seal mounting seat (3), and threaded holes (19) are provided on the installation ring (18) in a ring array through both ends.

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