Pump drive seal device

Abstract

This invention discloses a pump-driven sealing device, belonging to the field of magnetic pump technology. It includes a base, a sealing rear cover fixed to the top surface of the base, a sealing front cover sealed to one end of the sealing rear cover, a main controller mounted on one side of the sealing rear cover, and a fixed shaft bracket fixed inside the sealing front cover. An outer magnetic stator is inserted inside the sealing rear cover, and an isolation sleeve is inserted inside the outer magnetic stator. One end of the isolation sleeve cooperates with the interior of the sealing front cover to form a pumping chamber. An inner magnetic rotor and an expandable shaft support mechanism are arranged inside the isolation sleeve. A shaft sleeve is inserted and fixed inside the inner magnetic rotor, and the shaft sleeve is fitted onto the outer wall of the shaft support mechanism. An impeller located inside the pumping chamber is fitted to one end of the inner magnetic rotor. The main controller controls the extrusion assembly to extrude coolant into a storage tank. The elastic expansion of the storage tank pushes multiple sets of inner support assemblies outward, precisely fitting the inner wall of the shaft sleeve, achieving dynamic compensation for wear dimensions, extending the continuous operating time of the equipment, and ensuring the efficiency of pumping the solution.

Description

Technical Field

[0001] This application relates to the field of magnetic pump equipment technology, and more specifically, to pump drive sealing devices. Background Technology

[0002] Magnetic drive pumps, also known as magnetically driven pumps, are a type of shaft-sealed conveying device. They achieve separation of power transmission and media sealing through the magnetic coupling of an external magnetic stator and an internal magnetic rotor. Due to their advantages such as leak-free operation, compact structure, and stable operation, they are widely used in chemical, pharmaceutical, and environmental protection fields, and are particularly suitable for conveying highly hazardous media such as corrosive, flammable, explosive, toxic, and harmful substances. Their core working components include an external magnetic stator at the drive end, an internal magnetic rotor at the conveying end, and an isolation sleeve. The internal magnetic rotor is fixedly connected to the impeller, and a sealed cavity is formed between the internal magnetic rotor and the external magnetic stator through the isolation sleeve, completely avoiding the leakage risk of traditional mechanical seal pumps and ensuring the safety and environmental friendliness of the conveying process. As industrial production demands increasingly higher conveying accuracy, continuous operating time, and lower maintenance costs, the operational stability, wear resistance, and heat dissipation performance of magnetic drive pumps have become key factors restricting their application expansion.

[0003] In existing technologies, the core transmission and support structure of magnetically driven pumps uses a combination of a fixed shaft and a bushing. The outer magnetic stator generates a rotating magnetic field when energized, driving the inner magnetic rotor inside the isolation sleeve to rotate synchronously. The inner magnetic rotor is connected to the fixed shaft through the bushing, and the fixed shaft and bushing form a sliding friction pair, providing radial support for the inner magnetic rotor and ensuring stable impeller rotation for media delivery. However, during long-term use of the magnetically driven pump, the bushing of the inner magnetic rotor and the fixed shaft are prone to wear due to long-term high-speed rotation, resulting in an increased gap between them. This causes the inner magnetic rotor to swing and collide, forming a vicious cycle of "wear-vibration-further wear," which shortens the overall lifespan of the equipment, seriously affects the stability of solution delivery, and poses significant safety hazards.

[0004] In view of this, we propose a more efficient and stable pump-driven sealing device. Summary of the Invention

[0005] Technical problem to be solved: The purpose of this application is to provide a pump-driven sealing device that solves the technical problems mentioned in the background art.

[0006] Technical solution: The technical solution of this application provides a pump-driven sealing device, including a base, a sealing rear cover fixed on the top surface of the base, a sealing front cover sealed and fixed at one end of the sealing rear cover, a main controller provided on one side of the sealing rear cover, and a fixed shaft bracket fixed inside the sealing front cover. An external magnetic stator is inserted inside the sealed rear cover, and an isolation sleeve is inserted inside the external magnetic stator. One end of the isolation sleeve is fitted with the inside of the sealed front cover to form a pump fluid chamber. The isolation sleeve is equipped with an inner magnetic rotor and an expandable shaft support mechanism. A shaft sleeve is inserted and fixed inside the inner magnetic rotor. The shaft sleeve is sleeved on the outer wall of the shaft support mechanism. An impeller located inside the pump liquid chamber is sleeved on one end of the inner magnetic rotor. The shaft support mechanism includes a shaft cylinder with one end inserted into the isolation sleeve and the other end inserted into the fixed shaft frame. One end of the shaft cylinder is inserted with a shaft end cap. The shaft cylinder is equipped with an elastically expandable liquid storage cylinder and a push assembly. Multiple sets of inner support assemblies are inserted through the shaft cylinder. One side of the inner support assembly is attached to the outer wall of the liquid storage cylinder. The push assembly is equipped with a push cavity. The liquid storage cylinder and the push cavity are connected and both are filled with coolant. The main controller is electrically connected to the external magnetic stator and the extrusion assembly. The extrusion assembly squeezes the coolant inside the extrusion cavity into the storage cylinder, causing the storage cylinder to expand and push multiple sets of inner support assemblies to extend outward from the outer wall of the shaft cylinder, so as to fit and support the inner wall of the bushing, thereby compensating for the wear dimension between the bushing and the shaft cylinder.

[0007] Furthermore, a second liquid passage groove is provided on the inner wall of the bushing, and the second liquid passage groove is provided through both ends of the bushing. A water inlet groove is provided at the end of the second liquid passage groove near the shaft end cover. The second liquid passage groove is connected to the water inlet groove, the pump liquid chamber and the interior of the isolation sleeve.

[0008] Furthermore, the second liquid passage has a spiral structure.

[0009] Furthermore, the inner support assembly includes a support component and a fixed sliding column. The support component is inserted through the inside of the shaft cylinder, and the bottom surface of the support component is attached to the outer wall of the liquid storage cylinder. Fixed sliding columns are fixed at both ends of the support component. Two sliding grooves are opened inside the shaft cylinder, and the fixed sliding columns are slidably inserted into the sliding grooves. The support component is made of wear-resistant material, and the wear resistance of the support component is greater than that of the shaft cylinder.

[0010] Furthermore, the support component includes a central top block and a side top block that are inserted through the inside of the shaft cylinder. The side top block is connected to the side wall of the central top block. There are two side top blocks mirror images of the central top block about its vertical center line. A fixed sliding column is fixed to the side wall of the side top block. A first pad is fixed to the bottom surface of the central top block, and a second pad is fixed to the bottom surface of the side top block. The bottom surfaces of both the first pad and the second pad are attached to the outer wall of the liquid storage cylinder.

[0011] Furthermore, both the bottom surfaces of the first pad and the second pad have an arc-shaped structure.

[0012] Furthermore, the supporting component also includes a support plate fixed between the side walls of the two side top blocks, a limiting plate fixed on the bottom surface of the support plate, a first liquid passage groove with both ends penetrating the top surface of the middle top block, the support plate being inserted into the first liquid passage groove, the side top blocks being slidably connected to the side walls of the middle top block, and the limiting plate being slidably connected to the inside of the middle top block.

[0013] Furthermore, both the support plate and the first liquid passage are corrugated structures.

[0014] Furthermore, the extrusion assembly includes a liquid-pushing cylinder inserted into the shaft cylinder. One end of the liquid-pushing cylinder is connected to the inside of the liquid storage cylinder. An electric push rod and a piston are installed inside the liquid-pushing cylinder. The electric push rod and the piston are spaced apart. A spring is connected between the side of the piston near the electric push rod and the inner wall of the liquid-pushing cylinder. The electric push rod is used to push the piston to move horizontally inside the liquid-pushing cylinder.

[0015] Furthermore, the extrusion assembly also includes an infrared ranging sensor, which is disposed on the inner wall of the end of the extrusion cylinder away from the storage cylinder, and is used to monitor the piston displacement.

[0016] Beneficial effects: One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. The external magnetic stator drives the internal magnetic rotor to rotate through magnetic force, and the shaft support mechanism provides stable support for the internal magnetic rotor, ensuring the stability of the pumped solution.

[0017] 2. The main controller controls the extrusion assembly to squeeze the coolant into the storage tank. The elastic expansion of the storage tank pushes multiple sets of internal support assemblies to extend outward, precisely fitting the inner wall of the bushing, realizing dynamic compensation for wear dimensions, extending the continuous operation time of the equipment, and ensuring the efficiency of pumping the solution.

[0018] 3. The coolant in the reservoir and the extrusion assembly has both cooling and expansion driving functions. It not only assists in dynamic compensation, but also removes some frictional heat and slows down wear. The integrated design simplifies the structure and reduces energy consumption at the same time.

[0019] 4. The spiral structure of the second liquid channel is adapted to the rotation direction of the bushing. When the bushing rotates at high speed, the spiral channel can generate centrifugal force, accelerate the flow of solution, and improve heat dissipation efficiency. The spiral structure can make the solution evenly cover the inner wall of the bushing, achieving all-round and dead-angle heat dissipation. The flowing solution forms a stable vortex in the spiral channel, further enhancing the heat exchange effect.

[0020] 5. Because the support components are made of wear-resistant materials, and the wear resistance of the support components is greater than that of the shaft cylinder, the wear of the support components will be less than that of the shaft cylinder during operation. This allows for stable feedback on shaft cylinder wear and ensures that the internal support components have long-term compensation capabilities.

[0021] 6. The central top block and the two side top blocks cooperate to form a multi-contact support structure, which expands the contact area with the inner wall of the bushing and improves the support stability. The first pad and the second pad increase the contact area with the liquid storage cylinder, so that the expansion driving force of the liquid storage cylinder is evenly transmitted to the support component, ensuring that the extension force of the inner support component is sufficient.

[0022] 7. The side top block is slidably connected to the side wall of the middle top block, and the support plate is inserted into the first liquid channel, so that the support component can achieve multi-stage expansion and contraction to adapt to different degrees of wear gap compensation. The support plate and the limiting plate work together to enhance the structural rigidity of the support component and avoid long-term support deformation. The first liquid channel on the top surface of the middle top block opens after the support plate is retracted to form an auxiliary heat dissipation channel to ensure the cooling effect.

[0023] 8. The corrugated support plate and the first liquid channel extend the flow path of the solution, increase the heat exchange time, and improve the heat dissipation effect.

[0024] 9. The infrared ranging sensor monitors the piston displacement in real time and transmits the displacement data to the main controller. The main controller calculates the shrinkage of the reservoir based on the displacement, thereby accurately assessing the wear of the bushing and the cylinder. Based on the accurately monitored wear, the main controller can control the electric push rod to perform quantitative compensation, avoiding insufficient or excessive compensation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the pump-driven sealing device of the present invention.

[0026] Figure 2 This is an exploded view of the overall structure of the present invention.

[0027] Figure 3 This is a schematic diagram of the overall internal structure of the present invention.

[0028] Figure 4 This is a schematic diagram of the solution flow inside the isolation sleeve of the present invention.

[0029] Figure 5 This is a schematic diagram of the connection structure between the bushing, the inner magnetic rotor, and the shaft support mechanism of the present invention.

[0030] Figure 6 This is a schematic diagram of the internal structure of the shaft support mechanism of the present invention.

[0031] Figure 7 This is a schematic diagram of the internal support component structure of the present invention.

[0032] Figure 8 This is a schematic diagram of the connection structure between the support plate and the side top block of the present invention.

[0033] Figure 9 This is a schematic diagram of the internal structure of the bushing of the present invention.

[0034] Figure 10 This is a cross-sectional view of the shaft support mechanism of the present invention in its unworn state.

[0035] Figure 11 This is a cross-sectional view of the shaft support mechanism of the present invention under wear conditions.

[0036] Figure 12 This is a cross-sectional view of the internal support component of the present invention in the extended compensation state.

[0037] Explanation of the numbers in the diagram: 100, base; 200, sealed rear cover; 300, main controller; 400, external magnetic stator; 500, isolation sleeve; 600, shaft support mechanism; 610, shaft cylinder; 611, slide groove; 620, liquid storage cylinder; 630, internal support assembly; 631, central top block; 6311, first liquid passage groove; 632, first pad plate; 633, side top block; 634, second pad plate; 635. 636. Fixed sliding column; 637. Support plate; 640. Limiting plate; 641. Extrusion assembly; 642. Liquid pusher; 643. Electric push rod; 644. Infrared ranging sensor; 645. Piston; 646. Spring; 650. Shaft end cover; 700. Inner magnetic rotor; 710. Shaft sleeve; 711. Second liquid passage groove; 712. Water inlet groove; 800. Impeller; 900. Sealing front cover; 910. Fixed shaft bracket. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a link; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Reference Figures 1-12This application provides a pump-driven sealing device, including a base 100, a sealing rear cover 200 fixed on the top surface of the base 100, a sealing front cover 900 sealed and fixed at one end of the sealing rear cover 200, a main controller 300 provided on one side of the sealing rear cover 200, and a fixed shaft bracket 910 fixed inside the sealing front cover 900. An external magnetic stator 400 is inserted inside the sealed rear cover 200, and an isolation sleeve 500 is inserted inside the external magnetic stator 400. One end of the isolation sleeve 500 is sealed with the inside of the sealed front cover 900 to form a pump liquid chamber. The isolation sleeve 500 is provided with an inner magnetic rotor 700 and an expandable shaft support mechanism 600. A shaft sleeve 710 is inserted and fixed inside the inner magnetic rotor 700. The shaft sleeve 710 is sleeved on the outer wall of the shaft support mechanism 600. An impeller 800 located inside the pump liquid chamber is sleeved on one end of the inner magnetic rotor 700. The shaft support mechanism 600 includes a shaft cylinder 610 with one end inserted into the isolation sleeve 500 and the other end inserted into the fixed shaft bracket 910. One end of the shaft cylinder 610 is connected to a shaft end cap 650. The shaft cylinder 610 is provided with an elastically expandable liquid storage cylinder 620 and a push assembly 640. Multiple sets of inner support assemblies 630 are inserted through the shaft cylinder 610. One side of the inner support assembly 630 is attached to the outer wall of the liquid storage cylinder 620. The push assembly 640 is provided with a push cavity. The liquid storage cylinder 620 and the push cavity are connected and both are filled with coolant. The main controller 300 is electrically connected to the external magnetic stator 400 and the extrusion assembly 640 respectively. The extrusion assembly 640 squeezes the coolant inside the extrusion cavity into the liquid storage cylinder 620, causing the liquid storage cylinder 620 to expand and push multiple sets of inner support assemblies 630 to extend outward from the outer wall of the shaft cylinder 610, so as to fit and support the inner wall of the bushing 710, thereby achieving compensation for the wear size between the bushing 710 and the shaft cylinder 610. The outer magnetic stator 400 drives the inner magnetic rotor 700 to rotate through magnetic force, and the shaft support mechanism 600 provides stable support for the inner magnetic rotor 700, ensuring the stability of the pumped solution. The main controller 300 controls the extrusion assembly 640 to extrude coolant into the storage tank 620. The elastic expansion of the storage tank 620 pushes multiple sets of internal support assemblies 630 to extend outward, precisely fitting the inner wall of the bushing 710, realizing dynamic compensation for wear dimensions. This breaks through the traditional mode of needing to stop and replace parts after wear, realizing online dynamic compensation for wear gaps, extending the continuous operation time of the equipment, and ensuring the efficiency of pumping solution. The coolant in the reservoir 620 and the extrusion assembly 640 has both cooling and expansion driving functions. It can remove some of the frictional heat, delay wear, and the integrated design simplifies the structure while reducing energy consumption.

[0042] In this embodiment, a second liquid passage groove 711 is provided on the inner wall of the bushing 710. The second liquid passage groove 711 is provided through both ends of the bushing 710. A water inlet groove 712 is provided at one end of the second liquid passage groove 711 near the shaft end cover 650. The second liquid passage groove 711 is connected to the water inlet groove 712, the pump liquid chamber and the interior of the isolation sleeve 500. The second liquid channel 711 on the inner wall of the bushing 710 extends through both ends and communicates with the water inlet channel 712, the pump liquid chamber, and the interior of the isolation sleeve 500, forming a complete heat dissipation channel. The solution in the pump liquid chamber can enter the second liquid channel 711 through the water inlet channel 712, flow between the bushing 710 and the shaft cylinder 610, and quickly carry away the heat generated by friction, achieving active heat dissipation, improving the heat dissipation effect, reducing the working temperature of the bushing 710 and the shaft cylinder 610, and slowing down the wear rate. The cooled solution flows back into the impeller 800 without affecting the solution conveying process. The heat dissipation channel uses the conveying solution itself to achieve cooling, without the need for additional energy consumption, which is energy-saving and environmentally friendly, avoids coolant failure due to high temperature, and ensures long-term stable operation of the compensation mechanism.

[0043] In this embodiment, the second liquid channel 711 has a spiral structure. The spiral structure of the second liquid channel 711 is adapted to the rotation direction of the bushing 710. When the bushing 710 rotates at high speed, the spiral channel can generate centrifugal force, accelerate the flow of the solution, and improve the heat dissipation efficiency. The spiral structure can make the solution evenly cover the inner wall of the bushing 710, realizing all-round and dead-angle heat dissipation. The flowing solution forms a stable vortex in the spiral channel, further enhancing the heat exchange effect. The increased flow rate of the solution in the liquid circulation tank improves the uniformity of heat dissipation and completely eliminates the local high temperature phenomenon in the bushing 710; the spiral structure requires no additional drive and achieves efficient heat dissipation by utilizing the rotation of the bushing 710 itself, resulting in a compact structure and low cost; the wear uniformity between the bushing 710 and the shaft cylinder 610 is improved, extending the service life.

[0044] In this embodiment, the inner support assembly 630 includes a support component and a fixed sliding column 635. The support component is inserted through the inside of the shaft cylinder 610, and the bottom surface of the support component is attached to the outer wall of the liquid storage cylinder 620. Fixed sliding columns 635 are fixed at both ends of the support component. Two sliding grooves 611 are opened inside the shaft cylinder 610, and the fixed sliding column 635 is slidably inserted into the sliding groove 611. The support component is made of wear-resistant material, and the wear resistance of the support component is greater than that of the shaft cylinder 610. The fixed sliding column 635 is slidably inserted into the groove 611 of the shaft cylinder 610, providing stable guidance for the support component, preventing the inner support assembly 630 from shifting or jamming, and ensuring compensation accuracy. Since the support component is made of wear-resistant material, and the wear resistance of the support component is greater than that of the shaft cylinder 610, the wear of the support component will be less than that of the shaft cylinder 610 during operation. This can stably reflect the wear of the shaft cylinder 610 and ensure that the inner support assembly has long-term compensation capability. Multiple sets of inner support assemblies 630 are evenly distributed, which can achieve all-round fitting support of the inner wall of the bushing 710. The compensation mechanism has improved action response speed and smaller gap compensation error; the service life of the inner support component 630 is extended, reducing the maintenance frequency of the compensation mechanism; through differentiated wear design, it is ensured that only the wear of the shaft cylinder 610 needs to be compensated after wear, avoiding excessive consumption of the inner support component 630 and reducing maintenance costs.

[0045] In this embodiment, the support component includes a central top block 631 and a side top block 633 that are inserted through the inside of the shaft cylinder 610. The side top block 633 is connected to the side wall of the central top block 631. There are two side top blocks 633 mirror images of the vertical center line of the central top block 631. A fixed sliding column 635 is fixed to the side wall of the side top block 633. A first pad 632 is fixed to the bottom surface of the central top block 631, and a second pad 634 is fixed to the bottom surface of the side top block 633. The bottom surfaces of the first pad 632 and the second pad 634 are both attached to the outer wall of the liquid storage cylinder 620. The central top block 631 and the two side top blocks 633 cooperate to form a multi-contact support structure, which expands the contact area with the inner wall of the bushing 710 and improves the support stability; the first pad 632 and the second pad 634 increase the contact area with the liquid storage cylinder 620, so that the expansion driving force of the liquid storage cylinder 620 is evenly transmitted to the support component, ensuring that the extension force of the inner support component 630 is sufficient; the coordinated action of multiple components can adapt to different wear conditions of the inner wall of the bushing 710 and achieve precise fit; The fit between the support component and the bushing 710 is improved, and the coaxiality error of the bushing 710 is reduced; the uniformity of the force on the liquid storage cylinder 620 is improved, and the failure rate is reduced; the multi-contact support can disperse the pressure on the bushing 710 and avoid deformation of the bushing 710 caused by local stress concentration.

[0046] In this embodiment, the bottom surfaces of the first pad 632 and the second pad 634 are both arc-shaped structures. The arc-shaped structures of the first pad 632 and the second pad 634 are completely fitted with the outer wall of the liquid storage cylinder 620, eliminating contact gaps and allowing the expansion driving force of the liquid storage cylinder 620 to be transmitted to the supporting component without loss. The arc-shaped structure reduces the frictional resistance with the liquid storage cylinder 620, reducing the wear rate of the liquid storage cylinder 620. The increased contact area further improves the heat transfer efficiency and assists in heat dissipation.

[0047] In this embodiment, the supporting component further includes a support plate 636 fixed between the side walls of the two side top blocks 633. A limiting plate 637 is fixed on the bottom surface of the support plate 636. A first liquid passage groove 6311 with both ends penetrating is opened on the top surface of the middle top block 631. The support plate 636 is inserted into the first liquid passage groove 6311. The side top blocks 633 are slidably connected to the side walls of the middle top block 631. The limiting plate 637 is slidably connected to the inside of the middle top block 631. The side top block 633 is slidably connected to the side wall of the middle top block 631, and the support plate 636 is inserted into the first liquid channel 6311, so that the support component can achieve multi-stage expansion and contraction to adapt to different degrees of wear gap compensation; the support plate 636 and the limiting plate 637 work together to enhance the structural rigidity of the support component and avoid long-term support deformation; the first liquid channel 6311 on the top surface of the middle top block 631 opens after the support plate 636 is retracted, forming an auxiliary heat dissipation channel to ensure the cooling effect.

[0048] In this embodiment, both the support plate 636 and the first liquid channel 6311 are corrugated structures. The corrugated support plate 636 and the first liquid channel 6311 extend the flow path of the solution, increase the heat exchange time, and improve the heat dissipation effect. The corrugated structure can guide the solution to form a stable laminar flow, reduce flow resistance, and reduce the energy consumption of solution transportation. The corrugated inner wall increases the heat exchange area and further enhances the heat dissipation capacity.

[0049] In this embodiment, the extrusion assembly 640 includes a liquid-pushing cylinder 641 inserted into the shaft cylinder 610. One end of the liquid-pushing cylinder 641 is connected through to the inside of the liquid storage cylinder 620. An electric push rod 642 and a piston 644 are arranged inside the liquid-pushing cylinder 641. The electric push rod 642 and the piston 644 are spaced apart. A spring 645 is connected between the side of the piston 644 near the electric push rod 642 and the inner wall of the liquid-pushing cylinder 641. The electric push rod 642 is used to push the piston 644 to move horizontally inside the liquid-pushing cylinder 641. The liquid-pushing cylinder 641 and the liquid storage cylinder 620 are connected to form a sealed coolant circulation channel. The electric push rod 642 drives the piston 644 to move precisely, which can accurately control the amount of coolant squeezed into the liquid storage cylinder 620, thereby accurately controlling the expansion range of the liquid storage cylinder 620. The electric push rod 642 responds quickly and can adjust the amount of coolant squeezed in in real time according to the wear condition to achieve dynamic compensation.

[0050] In this embodiment, the extrusion assembly 640 further includes an infrared ranging sensor 643. The infrared ranging sensor 643 is disposed on the inner wall of the end of the push cylinder 641 away from the storage cylinder 620. The infrared ranging sensor 643 is used to monitor the displacement of the piston 644. The infrared ranging sensor 643 monitors the displacement of the piston 644 in real time and transmits the displacement data to the main controller 300. The main controller 300 calculates the shrinkage of the storage cylinder 620 based on the displacement, thereby accurately assessing the wear of the bushing 710 and the cylinder 610. Based on the accurately monitored wear, the main controller 300 can control the electric push rod 642 to perform quantitative compensation to avoid insufficient or excessive compensation. The sensor is a non-contact monitoring device, with no wear and fast response, ensuring the accuracy of the monitoring data.

[0051] Specifically, according to Figures 1-12 As shown, after the device is sealed and assembled, the solution is introduced through the inlet pipe at the end of the sealed front cover 900 and discharged through the outlet pipe at the top. An external power supply connects the main controller 300 to the outer magnetic stator 400, the electric push rod 642, and the infrared sensor. The outer magnetic stator 400 drives the inner magnetic rotor 700 to rotate inside the isolation sleeve 500 via magnetic force. Under the guiding support of the shaft support mechanism 600, the inner magnetic rotor 700 drives the impeller 800 to rotate stably, accelerating the discharge of the incoming solution from the outlet pipe. During this accelerated solution delivery process, the solution enters the isolation sleeve 500 and is then discharged through the guide pipe. The water tank 712 enters the second liquid channel 711 inside the bushing 710, and then is led out to the impeller 800. The flowing solution carries away the heat between the bushing 710 and the shaft support mechanism 600, avoiding overheating due to friction between the bushing 710 and the shaft support mechanism 600, and ensuring the stability of the rotation of the inner magnetic rotor 700. Furthermore, the second liquid channel 711 inside the bushing 710 is designed as a spiral structure, which allows the second liquid channel 711 to quickly and spirally transport the solution when the bushing 710 rotates at high speed with the inner magnetic rotor 700, improving the cooling effect and further ensuring the stability of the rotation of the inner magnetic rotor 700. As the bushing 710 rotates on the cylinder 610, some heat is transferred to the coolant in the reservoir 620 through the central top block 631 and the side top block 633. The first pad 632 and the second pad 634, with their arc structure, fully fit against the reservoir 620, improving the heat conduction and cooling effect, further preventing overheating between the bushing 710 and the cylinder 610, thus delaying wear between them. As the bushing 710 rotates on the cylinder 610 for a long time, the surfaces in contact with the cylinder 610 gradually wear, the diameter of the cylinder 610 decreases, and the gap between it and the bushing 710 gradually increases. The central top block 631 and the side top block 633 are both made of wear-resistant materials with a lower wear rate than the cylinder 610. The components are made of alloy materials, with the central top block 631 and the side top block 633 made of diamond. Due to the less wear on the central top block 631 and the side top block 633, and under the close-fitting and pushing of the bushing 710, the central top block 631 and the side top block 633 are retracted into the shaft cylinder 610. The fixed sliding column 635 slides inside the sliding groove 611, and the first pad 632 and the second pad 634 are in close contact to push and squeeze the liquid storage cylinder 620, so that the solution inside the liquid storage cylinder 620 is squeezed into the liquid pushing cylinder 641. The piston 644 moves inside the liquid pushing cylinder 641 to accommodate the squeezed coolant. The piston 644 pushes the compressed spring 645 to compress further, and the displacement of the piston 644 is monitored by the infrared ranging sensor 643, and the displacement data is transmitted to the main controller 300. As the wear of the cylinder 610 increases, the monitored displacement value of the piston 644 also increases. When the displacement value exceeds the set range for the wear level, the gap between the cylinder 610 and the bushing 710 becomes too large, making it difficult to ensure the stability of the rotation of the inner magnetic rotor 700. This may cause the bushing 710 and the inner magnetic rotor 700 to shift together, resulting in swaying and collisions, reducing the stability and safety of solution delivery. Furthermore, the increased gap between the second liquid channel 711 of the spiral structure and the cylinder 610 weakens the efficiency of spiral solution delivery, thus reducing the cooling effect between the bushing 710 and the cylinder 610. To ensure the stability of the rotation of the inner magnetic rotor 700 and the internal cooling effect, when the monitored displacement data exceeds the range, the main controller 300 controls the electric push rod 642 to push the piston 644, pushing the coolant into the reservoir 620. The reservoir 620 expands, pushing the first pad 632 and... The second pad 634 allows the central top block 631 and the side top block 633 to extend outward from inside the shaft cylinder 610. When the side top block 633 extends outward, the fixed sliding column 635 slides inside the sliding groove 611. Then, the fixed sliding column 635 is stopped inside the sliding groove 611, positioning the side top block 633. Then, the liquid storage cylinder 620 continues to expand, pushing the first pad 632. The central top block 631 extends further outward, while the support plate 636 retracts into the central top block 631, opening the top and both ends of the first liquid passage trough 6311 until the central top block 631 fits against the inner wall of the bushing 710, ensuring coaxiality between the bushing 710 and the shaft cylinder 610. The opened wavy first liquid passage trough 6311 facilitates the passage of more solution and effectively removes more heat, ensuring good cooling between the bushing 710 and the shaft cylinder 610. This achieves the effect of maintaining stable rotation of the inner magnetic rotor 700 to transport solution in the short term after excessive wear.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. All electrical components mentioned herein are electrically connected to the main controller 300 and 220V AC mains power, and the main controller 300 is a common prior art device used for control, such as a computer. Content not described in detail in this specification is prior art known to those skilled in the art.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A pump-driven sealing device, comprising a base, a sealing rear cover fixed to the top surface of the base, a sealing front cover fixed to one end of the sealing rear cover, a main controller disposed on one side of the sealing rear cover, and a fixed shaft bracket fixed inside the sealing front cover, characterized in that: An external magnetic stator is inserted inside the sealed rear cover, and an isolation sleeve is inserted inside the external magnetic stator. One end of the isolation sleeve is fitted with the inside of the sealed front cover to form a pump fluid chamber. The isolation sleeve is equipped with an inner magnetic rotor and an expandable shaft support mechanism. A shaft sleeve is inserted and fixed inside the inner magnetic rotor. The shaft sleeve is sleeved on the outer wall of the shaft support mechanism. An impeller located inside the pump liquid chamber is sleeved on one end of the inner magnetic rotor. The shaft support mechanism includes a shaft cylinder with one end inserted into the isolation sleeve and the other end inserted into the fixed shaft frame. One end of the shaft cylinder is inserted with a shaft end cap. The shaft cylinder is equipped with an elastically expandable liquid storage cylinder and a push assembly. Multiple sets of inner support assemblies are inserted through the shaft cylinder. One side of the inner support assembly is attached to the outer wall of the liquid storage cylinder. The push assembly is equipped with a push cavity. The liquid storage cylinder and the push cavity are connected and both are filled with coolant. The main controller is electrically connected to the external magnetic stator and the extrusion assembly. The extrusion assembly squeezes the coolant inside the extrusion cavity into the storage cylinder, causing the storage cylinder to expand and push multiple sets of inner support assemblies to extend outward from the outer wall of the shaft cylinder, so as to fit and support the inner wall of the bushing, thereby compensating for the wear dimension between the bushing and the shaft cylinder.

2. The pump-driven sealing device according to claim 1, characterized in that: The inner wall of the bushing is provided with a second liquid passage groove, which is opened through both ends of the bushing. A water inlet groove is opened at the end of the second liquid passage groove near the shaft end cover. The second liquid passage groove is connected to the water inlet groove, the pump liquid chamber and the interior of the isolation sleeve.

3. The pump-driven sealing device according to claim 2, characterized in that: The second liquid passage has a spiral structure.

4. The pump-driven sealing device according to claim 1, characterized in that: The internal support assembly includes a support component and a fixed sliding column. The support component is inserted through the inside of the shaft cylinder, and the bottom surface of the support component is attached to the outer wall of the liquid storage cylinder. Fixed sliding columns are fixed at both ends of the support component. Two sliding grooves are opened inside the shaft cylinder, and the fixed sliding columns are slidably inserted into the sliding grooves. The support component is made of wear-resistant material, and the wear resistance of the support component is greater than that of the shaft cylinder.

5. The pump-driven sealing device according to claim 4, characterized in that: The support component includes a central top block and a side top block that are inserted through the inside of the shaft cylinder. The side top block is connected to the side wall of the central top block. There are two side top blocks mirror images of the central top block about the vertical center line. A fixed sliding column is fixed to the side wall of the side top block. A first pad is fixed to the bottom surface of the central top block, and a second pad is fixed to the bottom surface of the side top block. The bottom surfaces of the first pad and the second pad are both attached to the outer wall of the liquid storage cylinder.

6. The pump-driven sealing device according to claim 5, characterized in that: The bottom surfaces of both the first pad and the second pad are arc-shaped structures.

7. The pump-driven sealing device according to claim 5, characterized in that: The supporting component also includes a support plate fixed between the side walls of the two side top blocks. A limiting plate is fixed on the bottom surface of the support plate. A first liquid passage groove with both ends penetrating is opened on the top surface of the middle top block. The support plate is inserted into the first liquid passage groove. The side top blocks are slidably connected to the side walls of the middle top block. The limiting plate is slidably connected to the inside of the middle top block.

8. The pump-driven sealing device according to claim 7, characterized in that: Both the support plate and the first liquid passage are corrugated structures.

9. The pump-driven sealing device according to claim 1, characterized in that: The extrusion assembly includes a liquid-pushing cylinder inserted into the shaft cylinder. One end of the liquid-pushing cylinder is connected to the inside of the liquid storage cylinder. An electric push rod and a piston are installed inside the liquid-pushing cylinder. The electric push rod and the piston are spaced apart. A spring is connected between the side of the piston near the electric push rod and the inner wall of the liquid-pushing cylinder. The electric push rod is used to push the piston to move horizontally inside the liquid-pushing cylinder.

10. The pump-driven sealing device according to claim 9, characterized in that: The extrusion assembly also includes an infrared ranging sensor, which is located on the inner wall of the end of the extrusion cylinder away from the storage cylinder. The infrared ranging sensor is used to monitor the piston displacement.

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