Multistage decompression type self-pressure regulating long-life mechanical seal device

Abstract

The application relates to the technical field of self-pressure-regulating sealing, and discloses a multistage pressure-reducing self-pressure-regulating long-service-life mechanical sealing device, which comprises a spring seat, a spring is fixedly arranged at the side wall of the spring seat, an outer wall of the spring is fixedly provided with a dynamic ring seat, an inner wall of the dynamic ring seat is fixedly provided with an O-shaped ring, an inner wall of the dynamic ring seat is fixedly provided with a dynamic ring, a sealing surface of a pump body is fixedly provided with a gland, an inner wall of the gland is fixedly provided with a pin, a side wall of the gland is fixedly provided with a static ring, when the dynamic ring rotates, liquid gradually enters the inside of the fixed ring, when the carried particles contact the V-shaped plate, the particles slide downward along the surface of the V-shaped plate under the thrust of the liquid, part of the particles continue to float up with the liquid and are intercepted by the blocking block, liquid continuously flows into the upper part of the V-shaped plate, a downward flushing action is generated on the floating particles, most of the solid particles can be directly blocked outside the friction pair gap, and the continuity of the liquid film and the pressure balance are prevented from being damaged by the particles.

Description

Technical Field

[0001] This invention relates to the field of self-regulating pressure sealing technology, specifically to a multi-stage pressure-reducing self-regulating pressure long-life mechanical seal device. Background Technology

[0002] The multi-stage pressure-reducing self-adjusting long-life mechanical seal device reduces the pressure difference of the main sealing end face through a multi-stage graded pressure reduction structure. It integrates a fluid-driven self-adjusting mechanism, which can automatically optimize the sealing end face clamping force according to the change of medium pressure, ensuring that the dynamic and static ring friction pairs are always in a reasonable working range, suppressing rapid wear of the seal and medium leakage under high pressure conditions, and achieving adaptive pressure adjustment by relying on a purely mechanical structure. In industrial settings, due to oversights in operation and maintenance management, filter cartridge life management mechanisms are often not established as required, resulting in filter cartridges exceeding their service life for extended periods. This leads to a continuous decline in filtration accuracy. If the cartridges are not replaced for a long time, the fine particles that were originally intercepted will enter the sealing cavity with the flow of the medium and eventually seep into the tiny gaps between the dynamic and static rings. This directly disrupts the original continuous liquid film structure, causing a sharp reduction in liquid film thickness or even partial disappearance. This can easily lead to dry operation of the dynamic and static rings, further exacerbating the risk of end-face burn-out. To address these issues, the following solutions are proposed. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a multi-stage pressure-reducing self-regulating long-life mechanical seal device, including a spring seat, a spring fixedly disposed on the side wall of the spring seat, a rotating ring seat fixedly disposed on the outer wall of the spring, an O-ring fixedly disposed on the inner wall of the rotating ring seat, a rotating ring fixedly disposed on the inner wall of the rotating ring seat, a pressure plate fixedly disposed on the sealing surface of the pump body, a pin fixedly disposed on the inner wall of the pressure plate, and a stationary ring fixedly disposed on the side wall of the pressure plate, and further comprising: The separation mechanism is fixedly installed on the side wall of the stationary ring; The separation mechanism includes a fixed ring fixedly connected to the side wall of the stationary ring, and several V-shaped plates fixedly connected to the inner wall of the fixed ring. The interception mechanism is rotatably mounted on the side wall of the rotating ring; The interception mechanism includes an irregularly shaped frame that is rotatably connected to the side wall of the moving ring; A buffer mechanism is fixedly installed on the side wall of the stationary ring. The buffer mechanism includes a flow guide ring fixedly connected to the side wall of the stationary ring.

[0004] Preferably, the separation mechanism includes: The initial separation component is fixedly installed on the side wall of the stationary ring; Multi-segment components are fixedly installed on the side wall of the initial segment component; When the rotating ring rotates, excess liquid passes through the side of the initial separation component and comes into contact with the multi-section components.

[0005] Preferably, the interception mechanism includes: Follower component, the follower component is rotatably mounted on the side wall of the rotating ring; The sealing assembly is fixedly installed on the side wall of the rotating ring; When the rotating ring rotates, the follower component rotates relative to the rotating ring, and the sealing component rotates synchronously with the rotating ring.

[0006] Preferably, the buffer mechanism includes: The drainage component is fixedly installed on the side wall of the stationary ring; The liquid gradually becomes calmer under the action of the drainage components.

[0007] Preferably, the initial separation component includes a blocking block fixedly connected to the inner wall of the fixing ring; As the moving ring rotates, the liquid gradually enters the fixed ring. When the liquid carrying particles comes into contact with the V-shaped plate, the particles slide down the surface of the V-shaped plate under the thrust of the liquid and fall below the V-shaped plate along with the liquid. The remaining particles move upward with the thrust of the liquid and come into contact with the V-shaped plate again, accumulating at the bottom of the V-shaped plate and adhering to the V-shaped plate. The remaining particles continue to float upward with the liquid and come into contact with the blocking block.

[0008] Preferably, the multi-segment component includes a protruding block fixedly connected to the side wall of the fixing ring, and a segmented block is fixedly connected to the top of the outer wall of the protruding block; When the remaining liquid passes through the side of the fixed ring, the liquid carrying the particles comes into contact with the top of the segment block and slides down the slope of the segment block. When the liquid comes into contact with the protruding block, it will flow down along the surface of the protruding block and generate a certain thrust on the particles sliding down from the top of the segment block, pushing them into the interior of the fixed ring.

[0009] Preferably, the follower component includes a torsion spring sleeved on the inner wall of the irregular frame; When the rotating ring rotates, it drives the irregular frame to move synchronously. As the rotation speed of the rotating ring gradually increases, the irregular frame is subjected to centrifugal force and liquid thrust, causing the irregular frame to rotate. During the rotation, pressure is applied to the torsion spring. As the irregular frame rotates continuously with the rotating ring, the particles are forced to fit against several inclined grooves on the side of the irregular frame.

[0010] Preferably, the sealing assembly includes a collection block fixedly connected to the side wall of the rotating ring; When the rotating ring is about to stop rotating, the irregular frame is reset by the elastic force of the torsion spring, and the irregular frame comes into contact with the collection block when it is reset, sending the intercepted particles into the collection block.

[0011] Preferably, the drainage component includes a flared plate that is slidably connected to the sidewall of the drainage ring; When the liquid passes through the irregular frame, it comes into contact with the guide ring and flows along the arc surface of the guide ring's side wall. When it comes into contact with the flared plate, it generates a thrust on the flared plate, causing the liquid to gradually expand along the flow path.

[0012] The present invention has the following beneficial effects: (1) When the moving ring rotates, the liquid gradually enters the fixed ring and carries the particles into contact with the V-shaped plate. Under the thrust of the liquid, the particles slide down along the surface of the V-shaped plate. Some particles accumulate below the V-shaped plate due to their own weight, while the remaining particles accumulate at the bottom of the V-shaped plate due to the thrust of the liquid. Some particles continue to float up with the liquid and are blocked by the blocking block. The liquid above the V-shaped plate continuously flows in, which has a downward scouring effect on the floating particles. Through the above components, most solid particles can be directly blocked outside the friction pair gap, preventing particles from intruding and damaging the continuity of the liquid film and pressure balance.

[0013] (2) When most of the liquid enters the fixed ring, the remaining liquid passes through the side of the fixed ring. At this time, the liquid carrying particles comes into contact with the top of the segment block and slides down the slope of the segment block. The left boundary of the protruding block is located to the left of the left boundary of the segment block. When the liquid comes into contact with the protruding block, it will flow down along the surface of the protruding block and generate a certain thrust on the particles sliding down from the top of the segment block. Through the above components, the particles carried in the liquid between the fixed ring and the moving ring are separated layer by layer, reducing the inflow of particles here and enhancing the protection of the liquid film between the moving ring and the stationary ring.

[0014] (3) When the rotating ring of the present invention rotates, it drives the irregular frame to move synchronously. As the rotation speed of the rotating ring gradually increases, the irregular frame is subjected to centrifugal force and liquid thrust, causing the irregular frame to rotate. When the irregular frame after rotation comes into contact with the particles, the particles are subjected to force and fit with several inclined grooves on the side of the irregular frame. With the cooperation of several inclined grooves, the situation of particles sliding outward and falling off along the side wall of the irregular frame is reduced. Through the above components, the particles in this space are intercepted, which greatly reduces the wear rate of the stationary ring and extends the service life of the stationary ring and even the entire sealing device.

[0015] (4) When the liquid passes through the irregular frame, it comes into contact with the guide ring and flows along the arc surface of the guide ring sidewall, so that the liquid flow velocity gradually slows down under the guidance of the arc surface. When the liquid flows on the surface of the guide ring, it comes into contact with the sidewall of the flared plate and generates a thrust on the flared plate, forcing the flared plate to gradually expand under force. As the liquid flows on the surface of the guide ring, it gradually expands along the flow path. Through the above components, the disturbed turbulent fluid is reorganized into a smooth laminar flow state, so that the fluid flow velocity distribution in the end face gap is uniform, and local velocity changes are prevented from disrupting the steady state of the flow field. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 This is a cross-sectional plan view of the overall structure of the present invention; Figure 4 This is a schematic cross-sectional view of the separation mechanism of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a cross-sectional schematic diagram of the interception mechanism of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle; Figure 8 This is a cross-sectional schematic diagram of the buffer mechanism of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Separation mechanism; 11. Initial separation component; 12. Multi-segment component; 13. Spring seat; 14. Spring; 15. Moving ring seat; 16. O-ring; 17. Moving ring; 18. Pressure cap; 19. Pin; 20. Stationary ring; 111. Fixed ring; 112. V-shaped plate; 113. Blocking block; 121. Protruding block; 122. Segmentation block; 2. Interception mechanism; 21. Follow-up component; 22. Sealing component; 211. Irregular frame; 212. Torsion spring; 221. Collection block; 3. Buffer mechanism; 31. Drainage component; 311. Guide ring; 312. Flaring plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1, please refer to Figures 1-8This invention relates to a multi-stage pressure-reducing, self-regulating, long-life mechanical seal device, comprising a spring seat 13, a spring 14 fixedly mounted on the side wall of the spring seat 13, a rotating ring seat 15 fixedly mounted on the outer wall of the spring 14, an O-ring 16 fixedly mounted on the inner wall of the rotating ring seat 15, a rotating ring 17 fixedly mounted on the inner wall of the rotating ring seat 15, a pressure cap 18 fixedly mounted on the sealing surface of the pump body, a pin 19 fixedly mounted on the inner wall of the pressure cap 18, and a stationary ring 20 fixedly mounted on the side wall of the pressure cap 18. It also includes: Separation mechanism 1 is fixedly installed on the side wall of stationary ring 20; The separation mechanism 1 includes a fixed ring 111 fixedly connected to the side wall of the stationary ring 20, and a number of V-shaped plates 112 fixedly connected to the inner wall of the fixed ring 111. Interception mechanism 2 is rotatably mounted on the side wall of the moving ring 17; The interception mechanism 2 includes an irregularly shaped frame 211 that is rotatably connected to the side wall of the moving ring 17; Buffer mechanism 3 is fixedly installed on the side wall of static ring 20; The buffer mechanism 3 includes a guide ring 311 fixedly connected to the side wall of the stationary ring 20.

[0021] Separation mechanism 1 includes: Initial separation component 11 is fixedly installed on the side wall of stationary ring 20; Multi-segment component 12 is fixedly disposed on the side wall of the initial segment component 11; When the pump shaft is started, the spring seat 13 rotates, and the spring 14 rotates synchronously with the spring seat 13. The preload on the end face of the spring 14 drives the rotating ring seat 15 to rotate. The rotating ring seat 15 then transmits the torque to the rotating ring 17, causing the rotating ring 17 to rotate synchronously with the shaft. At this time, the stationary ring 20 is fixed to the pressure cap 18 by the pin 19 and remains stationary throughout the process. When the rotating ring 17 rotates, the liquid gradually flows over the surface of the rotating ring 17 and enters the interior of the primary separation component 11 through the top slot of the primary separation component 11, forcing the liquid to fluctuate. Excess liquid then passes through the side of the primary separation component 11 and comes into contact with the multi-segment component 12.

[0022] Interception mechanism 2 includes: Follower component 21 is rotatably disposed on the side wall of the moving ring 17; The sealing component 22 is fixedly installed on the side wall of the rotating ring 17; When the rotating ring 17 rotates, it drives the follower component 21 to move synchronously. When the follower component 21 moves, it is subjected to centrifugal force and liquid thrust, causing the follower component 21 to rotate relative to the rotating ring 17. The sealing component 22 rotates synchronously with the rotating ring 17.

[0023] Buffer mechanism 3 includes: Drainage component 31 is fixedly installed on the side wall of stationary ring 20; When the liquid passes through the follower component 21, it comes into contact with the surface of the drainage component 31 and flows continuously along the surface of the drainage component 31. Under the action of the drainage component 31, the liquid gradually becomes smooth.

[0024] Example 2, please refer to Figures 4-8 The present invention is a multi-stage pressure-reducing self-adjusting pressure long-life mechanical seal device. Based on the first embodiment, the initial separation component 11 includes a blocking block 113 fixedly connected to the inner wall of the fixed ring 111. As the moving ring 17 rotates, the liquid gradually flows over its surface and comes into contact with the fixed ring 111. The liquid then enters the fixed ring 111 through the slot on its left side. When the liquid carrying particles comes into contact with the V-shaped plate 112, the particles slide down the surface of the V-shaped plate 112 under the thrust of the liquid, falling below the plate along with the liquid. As the liquid accumulates, some particles accumulate below the V-shaped plate 112 due to their own weight, while the remaining particles move upwards under the thrust of the liquid. When the particles come into contact with the V-shaped plate 112, they slide along the inclined surface of the V-shaped plate 112 and accumulate at the bottom of the V-shaped plate 112, adhering to the V-shaped plate 112. The remaining particles continue to float upward with the liquid and come into contact with the blocking block 113, where they are intercepted. The liquid can pass normally through several slots on the surface of the blocking block 113, and the liquid continuously flows in from above the V-shaped plate 112, creating a downward scouring effect on the floating particles, thereby reducing the number of particles passing through the blocking block 113.

[0025] The multi-segment component 12 includes a protrusion 121 fixedly connected to the side wall of the fixing ring 111, and a segment block 122 fixedly connected to the top of the outer wall of the protrusion 121; Since the rotating ring 17 cannot contact the fixed ring 111 during rotation, a gap exists between the fixed ring 111 and the rotating ring 17. When most of the liquid enters the interior of the fixed ring 111, the remaining liquid passes through the side of the fixed ring 111. During this process, the liquid carrying particles contacts the top of the segmented block 122 and slides down the slope of the segmented block 122, contacting the surface of the protruding block 121. Some particles float upward due to inertia when they contact the protruding block 121. The left boundary of the protruding block 121 is located to the left of the left boundary of the segmented block 122. When the liquid contacts the protruding block 121, it flows down along the surface of the protruding block 121, generating a certain thrust on the particles sliding down from the top of the segmented block 122, pushing them into the interior of the fixed ring 111. By setting several protruding blocks 121 and segmented blocks 122, the particles flowing through this area are intercepted in segments, reducing the number of particles entering the space between the rotating ring 17 and the stationary ring 20.

[0026] The follower component 21 includes a torsion spring 212 fitted on the inner wall of the irregular frame 211; When the moving ring 17 rotates, it causes the irregularly shaped frame 211 to move synchronously. As the rotational speed of the moving ring 17 gradually increases, the irregularly shaped frame 211 is subjected to centrifugal force, such as... Figure 7 As shown, during the rotation of the rotating ring 17, the liquid continuously flows over the surface of the rotating ring 17 and exerts a pushing force on the protruding block at the irregular frame 211F, causing the irregular frame 211 to rotate under force. During the rotation, pressure is applied to the torsion spring 212, forcing the torsion spring 212 to be compressed and accumulate potential energy. When the rotated irregular frame 211 comes into contact with the particles, since the irregular frame 211 rotates continuously with the rotating ring 17, the particles are forced to fit against several inclined grooves on the side of the irregular frame 211. With the cooperation of several inclined grooves, the situation of particles sliding outward and detaching along the side wall of the irregular frame 211 is reduced. The masses of several irregular frames 211 are all different, preventing several irregular frames 211 from being on the same plane during the rotation, which would prevent the inability to accurately intercept missed particles.

[0027] The sealing assembly 22 includes a collection block 221 fixedly connected to the side wall of the rotating ring 17; When the rotating ring 17 is about to stop rotating, the irregular frame 211 gradually loses the centrifugal force and liquid thrust. The irregular frame 211 completes its reset under the elastic force of the torsion spring 212. During the reset process, it drives the intercepted particles to move synchronously. When the irregular frame 211 completes its reset, it comes into contact with the collection block 221 and enters the interior of the collection block 221, sending the intercepted particles into the interior of the collection block 221 to prevent the particles from scattering on the surface of the rotating ring 17 when the equipment stops working.

[0028] The drainage component 31 includes a flared plate 312 that is slidably connected to the side wall of the guide ring 311; When the liquid passes through the irregular frame 211, it comes into contact with the guide ring 311 and flows along the arc surface of the side wall of the guide ring 311. The liquid flow velocity gradually slows down under the guidance of the arc surface. When the liquid flows on the surface of the guide ring 311, it comes into contact with the side wall of the flared plate 312 and exerts a thrust on the flared plate 312, forcing the flared plate 312 to gradually expand under the force. As the liquid flows on the surface of the guide ring 311, it gradually expands along the flow path.

[0029] A specific application of this embodiment is as follows: When the operator starts the pump shaft, the pump shaft drives the spring seat 13 to rotate. The spring 14 rotates synchronously with the spring seat 13, and the preload on the end face of the spring 14 drives the rotating ring seat 15 to rotate. The rotating ring seat 15 then transmits the torque to the rotating ring 17, so that the rotating ring 17 rotates synchronously with the shaft. At this time, the stationary ring 20 is fixed on the pressure plate 18 by the pin 19 and remains stationary throughout the process.

[0030] In industrial settings, due to oversights in operation and maintenance management, filter cartridge life management mechanisms are often not established as required, leading to filter cartridges serving beyond their service life for extended periods. This results in a continuous decline in filtration accuracy. When filter cartridges are not replaced for a long time, fine particles that were originally intercepted can enter the sealed cavity with the media flow, eventually seeping into the tiny gap between the rotating ring 17 and the stationary ring 20. This directly disrupts the original continuous liquid film structure, causing a sharp decrease or even partial disappearance of the liquid film thickness. This easily leads to dry running between the rotating ring 17 and the stationary ring 20, further increasing the risk of end-face burn-out. When the rotating ring 17 rotates, the liquid gradually flows across its surface, simultaneously contacting the stationary ring 111 and entering its interior through the groove on the left side of the stationary ring 111. When the liquid carrying particles comes into contact with the V-shaped plate 112, the particles, propelled by the liquid, slide down the surface of the V-shaped plate 112 and fall into the V-shaped plate 112 along with the liquid. Below 2, as the liquid accumulates, some particles accumulate below the V-shaped plate 112 due to their own weight, while the remaining particles move upward with the thrust of the liquid and come into contact with the V-shaped plate 112 again. At this time, the particles in contact with the V-shaped plate 112 slide along the inclined surface of the V-shaped plate 112 and accumulate at the bottom of the V-shaped plate 112, adhering to the V-shaped plate 112. The remaining particles continue to float upward with the liquid, come into contact with the blocking block 113, and are intercepted by the blocking block 113. The liquid can pass normally through several slots on the surface of the blocking block 113, and the liquid continuously flows in from above the V-shaped plate 112, which has a downward flushing effect on the floating particles, thereby reducing the number of particles passing through the blocking block 113. Through the above components, most solid particles can be directly blocked outside the friction pair gap, preventing particles from intruding and disrupting the continuity and pressure balance of the liquid film, and ensuring the long-term stable existence of the micron-level lubricating liquid film.

[0031] The retaining ring 111 is made of high-strength engineering plastic.

[0032] Utilizing the rotational characteristics of the moving ring 17, since the moving ring 17 cannot contact the fixed ring 111 during rotation, a gap exists between the fixed ring 111 and the moving ring 17. When most of the liquid enters the interior of the fixed ring 111, the remaining liquid passes through the side of the fixed ring 111. At this time, as the liquid carries particles through, it contacts the top of the segmented block 122 and slides down the inclined surface of the segmented block 122, contacting the surface of the protruding block 121. Some particles, upon contacting the protruding block 121, will float upwards due to inertia. The left boundary of the protruding block 121 is located to the left of the left boundary of the segmented block 122. When the liquid contacts the protruding block 121, it will flow down along the surface of the protruding block 121, thus flowing down from the segmented block 122. The particles sliding down from the top generate a certain thrust, pushing them into the fixed ring 111. By setting several protruding blocks 121 and segmented blocks 122, the particles flowing through this point are intercepted in segments, reducing the number of particles entering between the moving ring 17 and the stationary ring 20. Since the moving ring 17 rotates continuously, there will be a certain gap between the fixed ring 111 and the moving ring 17. When the liquid flows through this gap, it will carry fine particles in synchronously, causing these particles to directly enter between the moving ring 17 and the stationary ring 20, disrupting the liquid film. Through the above components, the particles carried in the liquid between the fixed ring 111 and the moving ring 17 are separated layer by layer, reducing the inflow of these particles and enhancing the protection of the liquid film between the moving ring 17 and the stationary ring 20.

[0033] Utilizing the characteristics of the rotating ring 17, when the rotating ring 17 rotates, it drives the irregular frame 211 to move synchronously. Furthermore, as the rotational speed of the rotating ring 17 gradually increases, the irregular frame 211 is subjected to centrifugal force, such as... Figure 7As shown, during the rotation of the moving ring 17, liquid continuously flows over its surface and exerts a pushing force on the protruding block at the irregular frame 211F, causing the irregular frame 211 to rotate under force. During this rotation, pressure is applied to the torsion spring 212, forcing it to compress and accumulate potential energy. When the rotated irregular frame 211 contacts the particles, the particles are forced to adhere to several inclined grooves on the side of the irregular frame 211 due to the continuous rotation of the irregular frame 211 with the moving ring 17. The cooperation of these inclined grooves reduces the likelihood of particles sliding outwards and detaching from the side wall of the irregular frame 211. The different masses of the irregular frames 211 further prevent the particles from slipping outwards. During the rotation of frame 211, it is on the same plane and cannot accurately intercept any missed particles. After the liquid passes through several protrusions 121 smoothly, some particles will still move to the bottom of fixed ring 111 under the thrust of the liquid. At this time, the moving ring 17 rotates at high speed, which makes the loose particles gain kinetic energy and move towards the stationary ring 20 with the airflow. Finally, they hit the surface of stationary ring 20 and form micro-scratches on the sealing end face of stationary ring 20, destroying the original high-precision flatness of the end face and causing an increase in the leakage of the medium. Through the above components, the particles in this space are intercepted, which greatly reduces the wear rate of stationary ring 20 and extends the service life of stationary ring 20 and even the entire sealing device.

[0034] Utilizing the rotational characteristic of the aforementioned irregular frame 211, the liquid, upon passing through the irregular frame 211, contacts the guide ring 311 and flows along the arc surface of the guide ring 311's sidewall. This causes the liquid flow velocity to gradually decrease under the guidance of the arc surface. Furthermore, as the liquid flows on the surface of the guide ring 311, it contacts the sidewall of the flared plate 312, generating a thrust on the flared plate 312, forcing it to gradually expand. This allows the liquid to gradually expand along the flow path while flowing on the surface of the guide ring 311. Due to the rotation of several irregular frames 211... The different masses of the 11 components cause the different rotation angles of the follower ring 17 during its rotation, which directly changes the cross-sectional shape of the flow channel, disrupting the original uniform laminar flow state. The original balance between shear flow and differential pressure flow is broken, and the liquid film pressure in the local area drops sharply, making it impossible to support the sealing surface to maintain a reasonable gap. The liquid film thickness becomes thinner rapidly or even ruptures locally. Through the above components, the disturbed turbulent fluid is reorganized into a smooth laminar flow state, so that the flow velocity of the fluid entering the end face gap is evenly distributed, preventing sudden changes in local flow velocity from disrupting the steady state of the flow field.

[0035] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage pressure-reducing self-adjusting long-life mechanical seal device, comprising a spring seat (13), a spring (14) fixedly disposed on the side wall of the spring seat (13), a rotating ring seat (15) fixedly disposed on the outer wall of the spring (14), an O-ring (16) fixedly disposed on the inner wall of the rotating ring seat (15), a rotating ring (17) fixedly disposed on the inner wall of the rotating ring seat (15), a pressure cap (18) fixedly disposed on the sealing surface of the pump body, a pin (19) fixedly disposed on the inner wall of the pressure cap (18), and a stationary ring (20) fixedly disposed on the side wall of the pressure cap (18), characterized in that, Also includes: Separation mechanism (1), which is fixedly installed on the side wall of stationary ring (20); The separation mechanism (1) includes a fixed ring (111) fixedly connected to the side wall of the stationary ring (20), and a plurality of V-shaped plates (112) are fixedly connected to the inner wall of the fixed ring (111). An interception mechanism (2) is rotatably disposed on the side wall of the moving ring (17); The interception mechanism (2) includes an irregular frame (211) that is rotatably connected to the side wall of the moving ring (17). A buffer mechanism (3) is fixedly installed on the side wall of the stationary ring (20); The buffer mechanism (3) includes a guide ring (311) fixedly connected to the side wall of the stationary ring (20).

2. The multi-stage pressure-reducing self-regulating long-life mechanical seal device according to claim 1, characterized in that: The separation mechanism (1) includes: The initial separation component (11) is fixedly disposed on the side wall of the stationary ring (20); Multi-segment component (12), which is fixedly disposed on the side wall of the initial segment component (11); When the moving ring (17) rotates, the liquid gradually flows over the surface of the moving ring (17) and enters the interior of the initial separation component (11) through the top slot of the initial separation component (11).

3. The multi-stage pressure-reducing self-regulating long-life mechanical seal device according to claim 2, characterized in that: The interception mechanism (2) includes: Follower assembly (21), which is rotatably disposed on the side wall of the moving ring (17); A sealing assembly (22) is fixedly disposed on the side wall of the moving ring (17); When the rotating ring (17) rotates, it drives the follower component (21) to move synchronously, and the follower component (21) is subjected to centrifugal force and liquid thrust when it moves.

4. The multi-stage pressure-reducing self-regulating long-life mechanical seal device according to claim 3, characterized in that: The buffer mechanism (3) includes: Drainage assembly (31), which is fixedly disposed on the side wall of the stationary ring (20); When the liquid passes through the follower component (21), it comes into contact with the surface of the drainage component (31).

5. The multi-stage pressure-reducing self-regulating long-life mechanical seal device according to claim 4, characterized in that: The initial separation component (11) includes a blocking block (113) fixedly connected to the inner wall of the fixing ring (111). There is a certain gap between the fixed ring (111) and the moving ring (17), and the surface of the V-shaped plate (112) is relatively smooth to prevent particles from adhering.

6. The multi-stage pressure-reducing self-regulating long-life mechanical seal device according to claim 5, characterized in that: The multi-segment assembly (12) includes a protrusion (121) fixedly connected to the side wall of the fixing ring (111), and a segment block (122) is fixedly connected to the top of the outer wall of the protrusion (121). The segmented block (122) is fixedly connected to the side wall of the fixed ring (111) at the end away from the moving ring (17).

7. A multi-stage pressure-reducing self-regulating long-life mechanical seal device according to claim 5, characterized in that: The follower component (21) includes a torsion spring (212) sleeved on the inner wall of the irregular frame (211). The masses of the several irregular frames (211) are different to prevent the several irregular frames (211) from being on the same plane during rotation, which would prevent them from accurately intercepting the missed particles. The two ends of the outer wall of the torsion spring (212) are fixedly connected to the side wall of the moving ring (17).

8. A multi-stage pressure-reducing self-regulating long-life mechanical seal device according to claim 7, characterized in that: The sealing assembly (22) includes a collection block (221) fixedly connected to the side wall of the moving ring (17). When the irregular frame (211) is not affected by external force, it is in full contact with the collection block (221) to achieve sealing.

9. A multi-stage pressure-reducing self-regulating long-life mechanical seal device according to claim 7, characterized in that: The drainage assembly (31) includes a flared plate (312) that is slidably connected to the side wall of the drainage ring (311). The flaring plate (312) has a certain degree of flexibility, and the flaring plate (312) slides along the surface of the guide ring (311) during the expansion process.

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