Baffle rotating shaft sealing equipment for pipeline isolation or adjustment
By introducing high-pressure sealing air and a multi-seal structure into the rotary shaft sealing device, the leakage problem caused by the aging of the seal ring is solved, achieving a long-term sealing effect and ensuring the stable operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-15
- Publication Date
- 2026-03-20
AI Technical Summary
Existing rotary shaft sealing equipment suffers from leakage due to aging of the sealing rings after long-term use, making it difficult to effectively prevent lubricating medium leakage and external contaminant intrusion, thus affecting the normal operation of the equipment.
Design a sealing structure including a shaft seal sleeve, flange, shaft body, pressure plate, clamping bolt, rubber sealing ring and air cavity. Utilize high-pressure sealing air to maintain the sealing effect when the sealing ring wears, and prevent leakage at the connection through multiple sealing mechanisms.
Even if the sealing ring wears out, the high-pressure sealing air can effectively prevent media leakage, and the multiple sealing mechanisms ensure that there is no leakage at the connection, thus guaranteeing the long-term stable operation of the equipment.
Smart Images
Figure CN224017717U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a rotating shaft sealing technical field, concretely is a baffle rotary shaft sealing equipment for pipeline isolation or regulation. BACKGROUND
[0002] The rotary shaft sealing equipment is a key device for dynamic sealing between a rotating shaft and a fixed component, is mainly used for preventing lubricating medium (such as oil, grease) leakage and blocking external pollutants (such as dust, moisture) intrusion, and its typical structure includes a metal framework, an elastic sealing lip (commonly using rubber or polyurethane material) and a spring hoop, forms a stable oil film through interference fit between the sealing lip and the shaft surface, realizes low-friction long-acting sealing, is widely used in the rotating machinery field of automobile wheel hub, industrial speed reducer, pump valve and the like, needs to select material (such as NBR, FKM) and type (such as TC oil seal, labyrinth seal) according to the shaft diameter, rotating speed, medium and temperature and the like working conditions, and high-performance design needs to consider wear resistance, temperature resistance and anti-yaw capacity, is a core component for guaranteeing long-life operation of equipment.
[0003] The existing rotary shaft packing sealing housing sealing mechanism is generally sealed through single-layer sealing ring or multi-layer sealing ring, and the sealing mechanism is relatively simple, and the sealing ring appears aging and other problems after long-term use, which leads to leakage problem in the operation process, even if the packing is replaced, the effect is also difficult to last, and the ash powder carried by high-temperature wind is sprayed out, which not only pollutes the environment, but also bakes the supporting bearing, causes the bearing lubricating grease to dry and solidify, and frequently appears the jamming phenomenon, thereby affecting the normal operation of equipment, therefore, a new technical scheme needs to be designed to solve the problem. UTILITY MODEL CONTENT
[0004] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0005] To realize the above object, the utility model provides the following technical scheme: a baffle rotary shaft sealing equipment for pipeline isolation or regulation, including the axle sleeve, the inside of axle sleeve is slidably connected with the pressure lan, the inside of axle sleeve is rotatably connected with the rotary shaft body, the outside of rotary shaft body is in close contact with the pressure lan, the outside of axle sleeve is fixedly connected with the air inlet pipe, the top of air inlet pipe is provided with the butt joint groove, the inner chamber bottom of butt joint groove is fixedly connected with the first sealing ring.
[0006] Preferably, the outer side of the rotating shaft body is rotationally connected with a pressing plate, one side of the pressing plate is screwed with a pressing bolt, one end of the pressing bolt penetrates through the pressing plate and extends to the inside of the shaft sleeve, and the pressing bolt is screwed with the shaft sleeve, and the shaft sleeve is installed on the shaft sleeve through the pressing bolt.
[0007] Preferably, the inner cavity of the shaft sleeve is movably connected with a first rubber sealing ring on one side and a second rubber sealing ring on the other side, and the gap between the rotating shaft and the shaft sleeve is sealed by the first rubber sealing ring and the second rubber sealing ring.
[0008] Preferably, the inner cavity of the shaft sleeve is provided with an air cavity, and the inner cavity of the shaft sleeve is movably connected with a support ring located in the air cavity, and the first rubber sealing ring and the second rubber sealing ring are pressed and deformed to seal the gap between the rotating shaft and the shaft sleeve by the support ring compressed by high-pressure gas.
[0009] Preferably, the two sides of the support ring are in contact with the first rubber sealing ring and the second rubber sealing ring, and the outer side of the support ring is provided with through holes which are uniformly distributed on one side.
[0010] Preferably, the inner side of the air inlet pipe is fixedly connected with a conical pipe, two clamping grooves are formed in the top end of the conical pipe, and the gap between the air inlet pipe and the connecting pipe is sealed by the clamping grooves cooperating with the clamping rings.
[0011] Preferably, the outer side of the air inlet pipe is screwed with a connecting pipe, the bottom end of the connecting pipe is fixedly connected with two second sealing rings, the bottom end of the second sealing ring extends to the inside of the butt joint groove, the bottom end of the connecting pipe is provided with a conical groove which is matched with the conical pipe, the one side of the conical groove is fixedly connected with two clamping rings which extend to the inside of the clamping grooves.
[0012] Compared with the prior art, the utility model has the advantages that:
[0013] 1. The baffle rotary shaft sealing device for pipeline isolation or regulation, through the rotating shaft sealing mechanism, high-pressure sealing air is injected into the air sealing cavity, even in the case of wear or aging failure of the first sealing packing, the high-pressure sealing air can effectively prevent the system from leaking.
[0014] 2. The baffle rotary shaft sealing device for pipeline isolation or regulation, through the air inlet pipe sealing mechanism, the connection gap between the air inlet pipe and the connecting pipe can be sealed multiple times, preventing the high-pressure sealing air injected into the shaft sleeve through the air inlet pipe from leaking through the connection gap between the air inlet pipe and the connecting pipe. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 A front view of a baffle rotary shaft sealing device for pipeline isolation or regulation is shown in the figure.
[0016] Figure 2 A front view of a baffle rotary shaft sealing device for pipeline isolation or regulation is shown in the figure.
[0017] Figure 3 A front view of a baffle rotary shaft sealing device for pipeline isolation or regulation is shown in the figure.
[0018] Figure 4 A front view of a baffle rotary shaft sealing device for pipeline isolation or regulation is shown in the figure.
[0019] In the figure: 100, shaft seal sleeve; 110, pressure land; 120, rotary shaft body; 121, pressure plate; 130, compression bolt; 140, first rubber sealing ring; 150, second rubber sealing ring; 160, air cavity; 170, support ring; 171, through hole; 200, air inlet pipe; 210, butt joint groove; 211, first sealing ring; 220, tapered pipe; 221, clamping groove; 230, connecting pipe; 231, second sealing ring; 240, tapered groove; 241, clamping ring. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.
[0021] Embodiment 1: Please refer to Figures 1-4The utility model provides a baffle rotary shaft sealing equipment for pipeline isolation or regulation, including shaft seal cover 100, the inside slide connection of shaft seal cover 100 has pressure lan 110, the inside rotation connection of shaft seal cover 100 has the rotary shaft body 120, the outside of rotary shaft body 120 and pressure lan 110's mutual adhesion, the outside fixed connection of rotary shaft body 120 has the pressure plate 121, the one side of pressure plate 121 is screwed with the pressure bolt 130, and one end of pressure bolt 130 penetrates pressure plate 121 and extends to the inside of shaft seal cover 100, and pressure bolt 130 is screwed with shaft seal cover 100, the inside chamber one side movable joint of shaft seal cover 100 has first rubber seal ring 140, the inside chamber other side movable joint of shaft seal cover 100 has second rubber seal ring 150, and the inside chamber of shaft seal cover 100 is provided with air cavity 160, and the inside chamber movable joint of shaft seal cover 100 has support ring 170, and support ring 170 is located in air cavity 160, and the both sides of support ring 170 are in contact with first rubber seal ring 140 and second rubber seal ring 150, and the outside of support ring 170 is provided with through -hole 171, and the one side evenly distributed of through -hole 171.
[0022] Specifically, three seals are built in the shaft seal cover 100, which are the first rubber seal ring 140, the air cavity 160 and the second rubber seal ring 150. The first rubber seal ring 140 and the second rubber seal ring 150 can be flexibly deformed under external force, so as to tightly fit with the inner wall of the shaft seal cover 100 and the shaft diameter of the rotary shaft to realize sealing. The air cavity 160 forms a closed space under the action of the first rubber seal ring 140 and the second rubber seal ring 150. When the sealing air is filled, the space always maintains a high pressure state. The static seal is formed between the first rubber seal ring 140, the air cavity 160 and the second rubber seal ring 150, and the sealing state is basically not damaged. The dynamic seal is formed between the first rubber seal ring 140, the second rubber seal ring 150 and the rotary shaft. In the use process, due to the wear of the filler, the sealing state may be damaged, resulting in leakage. When the sealing state of the first rubber seal ring 140 is damaged, it is not easy to be found because it is located in the inside of the shaft seal cover 100. At this time, the air cavity 160 will immediately play a role, and its pressure is higher than the medium pressure in the system, which can effectively prevent the leakage of the medium in the system. The leakage of the second rubber seal ring 150 belongs to external leakage and is easy to be found. By tightening the pressure bolt 130, the filler of the second rubber seal ring 150 can be further subjected to axial force to be extruded and deformed to realize sealing effect, so as to eliminate leakage.
[0023] Example 2: Please refer to Figures 1-4The outer side of the shaft sealing sleeve 100 is fixedly connected with an air inlet pipe 200, the top end of the air inlet pipe 200 is provided with a butt joint groove 210, the inner cavity bottom of the butt joint groove 210 is fixedly connected with a first sealing ring 211, the inner side of the air inlet pipe 200 is fixedly connected with a conical pipe 220, the top end of the conical pipe 220 is provided with two clamping grooves 221, the outer side of the air inlet pipe 200 is screwed with a connecting pipe 230, the bottom end of the connecting pipe 230 is fixedly connected with two second sealing rings 231, the bottom end of the second sealing ring 231 extends to the inner side of the butt joint groove 210, the bottom end of the connecting pipe 230 is provided with a conical groove 240, the conical groove 240 is in close contact with the conical pipe 220, one side of the conical groove 240 is fixedly connected with two clamping rings 241, and the clamping ring 241 extends to the inner side of the clamping groove 221.
[0024] Specifically, after the connecting pipe 230 is connected with the air inlet pipe 200, the second sealing ring 231 on the connecting pipe 230 is inserted into the butt joint groove 210 on the air inlet pipe 200, and meanwhile, the second sealing ring 231 is in close contact with the first sealing ring 211 in the butt joint groove 210, thereby forming multiple sealing partitions, and the conical groove 240 on the connecting pipe 230 is in close contact with the conical pipe 220, so that the clamping ring 241 on the conical groove 240 is in butt joint with the clamping groove 221 on the conical pipe 220, thereby forming multiple sealing partitions, and the gap between the connecting pipe 230 and the air inlet pipe 200 is sealed.
[0025] Working principle: The shaft sealing sleeve 100 is internally provided with three seals, which are a first rubber sealing ring 140, an air cavity 160 and a second rubber sealing ring 150. The first rubber sealing ring 140 and the second rubber sealing ring 150 can be flexibly deformed under the action of external force, so as to be closely attached to the inner wall of the shaft sealing sleeve 100 and the shaft diameter of the rotating shaft to realize sealing. The air cavity 160 forms a closed space under the action of the first rubber sealing ring 140 and the second rubber sealing ring 150. When the sealing air is filled, the space always maintains a high pressure state. The first rubber sealing ring 140, the air cavity 160 and the second rubber sealing ring 150 form a static seal, and the sealing state is basically not damaged. The first rubber sealing ring 140 and the second rubber sealing ring 150 form a dynamic seal with the rotating shaft. In the use process, due to the wear of the filler, the sealing state may be damaged, resulting in leakage. When the sealing state of the first rubber sealing ring 140 is damaged, it is not easy to be found because it is located inside the shaft sealing sleeve 100. At this time, the air cavity 160 will immediately play a role, and its pressure is higher than the medium pressure in the system, which can effectively prevent the leakage of the medium in the system. The leakage of the second rubber sealing ring 150 belongs to external leakage and is easy to be found. By tightening the compression bolt 130, the filler of the second rubber sealing ring 150 can be subjected to further axial force to be extruded and deformed to realize the sealing effect, so as to eliminate the leakage.
[0026] After the connecting pipe 230 is connected with the air inlet pipe 200, the second sealing ring 231 on the connecting pipe 230 is inserted into the counter slot 210 on the air inlet pipe 200, meanwhile, the second sealing ring 231 is also attached with the first sealing ring 211 in the counter slot 210, forming multiple sealing partitions, and the tapered slot 240 on the connecting pipe 230 is attached with the tapered pipe 220, so that the clamping ring 241 on the tapered slot 240 is connected with the clamping slot 221 on the tapered pipe 220, forming multiple sealing partitions, and sealing the gap between the connecting pipe 230 and the air inlet pipe 200.
[0027] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded only as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced in the present application. Any reference signs in the claims should not be regarded as limiting the claims to which they relate.
Claims
1. A baffle rotary shaft sealing device for pipeline isolation or regulation, comprising a shaft seal sleeve (100), characterized in that, The inner side of the shaft seal sleeve (100) is slidably connected to the flange (110), and the inner side of the shaft seal sleeve (100) is rotatably connected to the shaft body (120). The outer side of the shaft body (120) is in contact with the flange (110). An air inlet pipe (200) is fixedly connected to the outer side of the shaft seal sleeve (100). A docking groove (210) is provided at the top of the air inlet pipe (200), and a first sealing ring (211) is fixedly connected to the bottom of the inner cavity of the docking groove (210).
2. The baffle rotary shaft sealing device for pipeline isolation or adjustment as described in claim 1, characterized in that, A pressure plate (121) is rotatably connected to the outside of the rotating shaft body (120). A clamping bolt (130) is screwed onto one side of the pressure plate (121). One end of the clamping bolt (130) passes through the pressure plate (121) and extends into the interior of the shaft sleeve (100). The clamping bolt (130) is screwed onto the shaft sleeve (100).
3. A baffle rotary shaft sealing device for pipeline isolation or adjustment as described in claim 2, characterized in that, A first rubber sealing ring (140) is movably connected to one side of the inner cavity of the shaft seal sleeve (100), and a second rubber sealing ring (150) is movably connected to the other side of the inner cavity of the shaft seal sleeve (100).
4. A baffle rotary shaft sealing device for pipeline isolation or adjustment as described in claim 3, characterized in that, The inner cavity of the shaft seal sleeve (100) is provided with an air cavity (160), and a support ring (170) is movably connected to the inner cavity of the shaft seal sleeve (100), and the support ring (170) is located in the air cavity (160).
5. A baffle rotary shaft sealing device for pipeline isolation or adjustment as described in claim 4, characterized in that, The two sides of the support ring (170) are in contact with the first rubber sealing ring (140) and the second rubber sealing ring (150). The outer side of the support ring (170) is provided with through holes (171), and the through holes (171) are evenly distributed on one side.
6. A baffle rotary shaft sealing device for pipeline isolation or adjustment as described in claim 1, characterized in that, A tapered tube (220) is fixedly connected to the inner side of the air inlet pipe (200), and two slots (221) are opened at the top of the tapered tube (220).
7. A baffle rotary shaft sealing device for pipeline isolation or adjustment as described in claim 6, characterized in that, A connecting pipe (230) is screwed to the outside of the air inlet pipe (200). Two second sealing rings (231) are fixedly connected to the bottom end of the connecting pipe (230). The bottom end of the second sealing ring (231) extends to the inside of the docking groove (210). A tapered groove (240) is opened at the bottom end of the connecting pipe (230). The tapered groove (240) fits against the tapered pipe (220). Two retaining rings (241) are fixedly connected to one side of the tapered groove (240). The retaining rings (241) extend to the inside of the retaining groove (221).