Mechanical seal sleeve structure for three-in-one kettle

Abstract

The application discloses a mechanical seal shaft sleeve structure for a three-in-one kettle, and relates to the technical field of mechanical seals, which comprises a reaction kettle, a protective shell installed on the top of the reaction kettle, a stirring shaft rotatably connected at the shaft center of the reaction kettle, a shaft sleeve arranged at the connecting position of the protective shell and the reaction kettle, a dynamic ring assembly and a static ring assembly arranged on the outer side of the shaft sleeve, the dynamic ring assembly and the static ring assembly being used for ensuring the sealing property of the reaction kettle, a clamping ring being used for connecting the stirring shaft and the shaft sleeve, a cooling device arranged on the top side of the static ring assembly, the cooling device being used for cooling the lubricating liquid between the static ring assembly and the dynamic ring assembly, the cooling device comprising a cooling ring cylinder, and a plurality of air inlet holes, a plurality of flow guiding and heat equalizing holes are formed in the cooling ring cylinder, two air inlet holes are formed in the side wall of the cooling ring cylinder in an equidistant manner, and a plurality of heat dissipation fins are fixedly connected to the outer side of the cooling ring cylinder. The application can delay the deterioration period of the sealing liquid, clean the oil sludge, and avoid the loss of human resources.

Description

Technical Field

[0001] This invention relates to the field of mechanical seal technology, specifically to a mechanical seal bushing structure for a three-in-one reactor. Background Technology

[0002] In reaction vessel equipment in chemical, pharmaceutical and other fields, mechanical seals are key components to prevent media leakage. Traditional mechanical seals for reactors often have a relatively simple structure. During long-term operation, the sealing fluid is prone to a series of physical and chemical changes in the closed or semi-closed circulation system, which directly affects the sealing performance and equipment life.

[0003] In the existing technology, poor circulation of sealing fluid and poor heat dissipation lead to a large accumulation of sludge, which can easily cause blockage inside the sealing component. This not only hinders the normal flow of sealing fluid, but may also cause the dynamic ring component to seize up and lose its following compensation capability. At the same time, the heat generated by the friction between the dynamic ring and the stationary ring cannot be dissipated in time, which will further aggravate the thermal deformation and wear of the seal, and even lead to seal failure, causing serious material leakage accidents.

[0004] CN211343762U discloses a mechanical seal bushing structure for a three-in-one reactor, including a main shaft, multiple sets of retaining blocks on the outer side of the main shaft, a bushing on the outer side of the main shaft, a through hole inside the bushing, multiple sets of retaining grooves inside the through hole, a fixing block at the middle position on the outer side of the bushing, a bearing installed inside the fixing block, a connecting block at the bottom of the fixing block, a limit block at the bottom of the connecting block, and a sealing chamber inside the connecting block. This patented design allows the spindle to slide up and down within the bushing via a through-hole. The interlocking of the slot and the locking block limits the movement of the spindle and bushing. Furthermore, the internal bearing of the fixed block enables the spindle to rotate, causing the bushing to rotate as well. This allows the spindle to slide up and down relative to the bushing while simultaneously rotating it, facilitating use and improving the practicality of the mechanical seal bearing structure. However, this device cannot handle the large amount of heat generated during high-speed operation of the shaft, which can damage the lifespan of the mechanical seal structure. Therefore, a mechanical seal bushing structure integrating efficient heat dissipation and self-cleaning functions is urgently needed to delay the deterioration cycle of the sealing fluid and to clean sludge, avoiding the waste of human resources. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a mechanical seal bushing structure for a three-in-one reactor, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mechanical seal bushing structure for a three-in-one reactor, comprising a reactor, a protective shell mounted on the top of the reactor, a stirring shaft rotatably connected to the reactor's axis, and a clamping ring. A bushing is provided at the connection between the protective shell and the reactor. A moving ring assembly and a stationary ring assembly are provided on the outer side of the bushing. The moving ring assembly and the stationary ring assembly are used to ensure the sealing of the reactor. The clamping ring is used to connect the stirring shaft and the bushing.

[0007] A cooling device is provided on the top side of the stationary ring assembly, which is used to dissipate heat from the lubricant between the stationary ring assembly and the rotating ring assembly.

[0008] The cooling device includes a cooling ring cylinder and an air inlet. The cooling ring cylinder has multiple heat dissipation holes, and the side wall of the cooling ring cylinder has two equally spaced air inlets. Multiple heat dissipation fins are fixedly connected to the outer side of the cooling ring cylinder.

[0009] The top of the cooling ring cylinder is provided with an upper cover, and the bottom of the cooling ring cylinder is provided with a lower cover. The lower cover is connected to the liquid inlet of the stationary ring assembly, and the upper cover is connected to the liquid outlet of the stationary ring assembly.

[0010] A partition is provided between the upper cover, the lower cover and the inner wall of the protective shell to restrict the guidance of the cooling airflow channel. An air inlet is provided in the area between the upper cover and the lower cover of the protective shell.

[0011] The stirring shaft is fixedly connected to the outer side of the upper cover with fan blades;

[0012] The rotation of the stirring shaft drives the fan blades to rotate, drawing in outside air through the air inlet. The airflow first blows on the surface of the heat dissipation fins for heat exchange, and then enters the internal cavity of the cooling ring cylinder through the air inlet. Finally, it is discharged from the annular gap between the stirring shaft and the top of the protective shell, forming a forced convection heat dissipation channel from bottom to top, thereby achieving the cooling of the lubricant.

[0013] According to the above technical solution, a bearing is provided on the top of the stationary ring assembly. The bearing is used to ensure the stability of the working state of the stirring shaft. A clamping ring connected to the stirring shaft is provided on the top of the bearing.

[0014] The lubrication area of ​​the bearing is filled with lubricating fluid, and it is connected to the lubricating fluid between the stationary ring assembly and the rotating ring assembly.

[0015] According to the above technical solution, the upper cover and the lower cover are provided with a second flow channel and a first flow channel at the positions corresponding to the heat dissipation holes. The upper cover and the cooling ring cylinder are provided with a first flow channel on their adjacent surfaces. Under normal conditions, the first flow channel is used to connect each second flow channel.

[0016] The lower cover is provided with a flow groove two on the side adjacent to the cooling ring cylinder. The flow groove two is used to collect the liquid flowing out of each branch groove one.

[0017] The cross-sectional area of ​​the plurality of flow guiding and heat equalization holes is larger than the cross-sectional area of ​​the liquid inlet of the upper cap;

[0018] The upper cap has one inlet and the lower cap has one outlet.

[0019] According to the above technical solution, a rotating ring assembly is provided on the outer side of the bushing. The rotating ring assembly includes a spring. The spring is fixedly connected to the outer side of the bushing. Rotating ring spring frames are slidably connected to both sides of the spring. Multiple rotating rings are provided inside the spring. The spring applies an elastic preload force to the rotating ring spring frames.

[0020] A stationary ring assembly is fixedly connected to the top of the reactor. The stationary ring assembly includes a stationary ring seat, which is sleeved on the outside of the rotating ring spring frame. There is a gap between the stationary ring seat and the rotating ring spring frame. A stationary ring is fixedly connected to the end face of the stationary ring seat corresponding to the rotating ring spring frame. The contact surfaces of the stationary ring and the rotating ring spring frame are in close contact.

[0021] According to the above technical solution, a liquid inlet hole is provided at the bottom of one side of the stationary ring seat, and a liquid outlet hole is provided at the top of one side of the stationary ring seat. The lubricating fluid is input through the liquid inlet hole and output through the liquid outlet hole.

[0022] According to the above technical solution, a scraping device is provided inside the heat dissipation hole. The scraping device is used to clean the sludge adhering to the inner wall of the heat dissipation hole. The scraping device includes a piston rod and a sludge collection chamber. The piston rod passes through the heat dissipation hole and the second diversion groove. A piston is fixedly connected to the bottom of the piston rod. The piston is slidably connected in the second diversion groove, the heat dissipation hole, and the first diversion groove. A scraping ring is provided on the top side of the piston. The scraping ring is used to scrape the sludge. The scraping ring is slidably connected to the piston rod. A second spring is provided between the scraping ring and the piston. The second spring is used to control the movement gap between the scraping ring and the piston.

[0023] The piston has a through hole for connecting the gap between the scraping ring and the piston.

[0024] According to the above technical solution, the second diversion channel penetrates the upper cover, and a sludge collection chamber is fixedly connected to the end of the second diversion channel away from the cooling ring cylinder. A sludge collection hole is opened on the side of the sludge collection chamber close to the cooling ring cylinder. A one-way valve is installed in the sludge collection chamber. The one-way valve is used to temporarily place the liquid input from the sludge collection hole in the sludge collection chamber.

[0025] The gap between the sludge collection chamber and the top of the cooling ring cylinder corresponds to the gap between the scraping ring and the piston.

[0026] The top of the piston rod passes through the sludge collection chamber, and a magnetic ring is fixedly connected to the top of the sludge collection chamber;

[0027] A reset magnet is provided on the top of the protective shell, and the reset magnet corresponds to the magnetic ring.

[0028] According to the above technical solution, a flow control hole is provided on the flow channel one between the two flow dividers, and a flow control device is provided in the flow control hole. The flow control device is used to control the flow direction of the lubricating fluid.

[0029] The flow control device includes a central column and a spring three. The spring three is installed inside the cooling ring cylinder. The upper and lower ends of the central column are fixedly connected to guide columns. The middle part of the central column is fixedly connected to a flow-limiting column. The flow-limiting column has multiple axially penetrating through holes. A flow-blocking film is provided on the side of the flow-limiting column away from the spring three.

[0030] The guide post is slidably connected inside the flow control hole, and a magnetic post is fixedly connected to the top of the guide post, with the top of the magnetic post protruding from the upper cover.

[0031] The top of the protective shell is provided with a driving device, which is used to drive the scraping device and the flow control device to work.

[0032] The driving device includes a magnetic plate one, which is rotatably connected inside the protective housing. A spiral plate is fixedly connected to the inner wall of the magnetic plate one, and the bottom side of the spiral plate corresponds to the top of the piston rod. A magnetic plate two is fixedly connected to the inner wall of the magnetic plate one, and the magnetic plate two corresponds to the bottom side of the magnetic column.

[0033] This invention provides a mechanical seal bushing structure for a three-in-one reactor. It has the following advantages:

[0034] This invention utilizes fan blades installed on the outside of the stirring shaft to drive airflow for heat dissipation by changing the rotational speed of the stirring shaft itself. When the stirring shaft operates at low speed, the system relies on natural convection for heat dissipation, meeting basic heat exchange requirements. When the stirring shaft operates at high speed, frictional heat increases, and the negative pressure generated by the fan blades increases accordingly, enhancing the intake of cooling airflow and thus automatically increasing the heat dissipation intensity. This design, which automatically adjusts the heat dissipation capacity according to the working state, avoids the problem of excessive lubricant temperature and deterioration caused by changes in rotational speed, significantly reduces thermal wear of the dynamic and static ring components, and improves the stability and durability of equipment operation.

[0035] This invention reduces the flow rate of the lubricant by setting flow-guiding and heat-equalizing holes inside the cooling ring cylinder and designing their cross-sectional area to be several times that of the liquid inlet of the upper cover. Combined with the cooling effect of the heat dissipation fins, the sludge in the lubricant preferentially adheres to the inner wall of the flow-guiding and heat-equalizing holes due to the reduced flow rate and temperature when flowing through them. This fundamentally prevents the sealing failure caused by the accumulation of sludge on the sealing surface and improves the service life of the dynamic ring assembly and the stationary ring assembly.

[0036] This invention uses a driving device to drive a piston rod and a scraping ring to slide within the heat dissipation orifice via a magnetic plate and a spiral plate, physically scraping away the attached sludge. With the design of the flow control orifice and the flow limiting column, the liquid path of a single heat dissipation orifice can be cut off when cleaning it. The piston squeezes out the dirt into the collection chamber, and the automated scraping and cleaning reduces maintenance costs and manpower consumption. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 This is a schematic diagram of the overall half-section structure of the present invention;

[0039] Figure 3 For the whole of the invention Figure 1 Internal structure diagram;

[0040] Figure 4 This invention as a whole Figure 3 A partial half-section structural diagram;

[0041] Figure 5 This invention as a whole Figure 3 A schematic diagram of the stepped cross-section structure;

[0042] Figure 6 This invention as a whole Figure 3 A schematic diagram of the unfolded structure;

[0043] Figure 7 This invention as a whole Figure 5 A schematic diagram of the structure of area A;

[0044] Figure 8 This invention as a whole Figure 5 A structural diagram of area B;

[0045] Figure 9 This invention as a whole Figure 5 A schematic diagram of the structure of region C;

[0046] Figure 10 This invention as a whole Figure 6 A side view of the structure;

[0047] Figure 11 This invention as a whole Figure 10 A schematic diagram of the structure of region D;

[0048] In the diagram: 1. Protective outer casing; 2. Bushing;

[0049] 3. Moving ring assembly; 301. Moving ring spring frame; 302. Spring 1; 303. Moving ring;

[0050] 4. Clamping ring;

[0051] 5. Stationary ring assembly; 501. Stationary ring seat; 502. Stationary ring; 503. Liquid inlet; 504. Liquid outlet;

[0052] 6. Cooling device; 601. Upper cover; 602. Cooling ring cylinder; 603. Lower cover; 604. Air inlet; 605. Flow channel one; 606. Flow guide and heat dissipation hole; 607. Flow divider one; 608. Flow channel two; 609. Flow divider two; 610. Flow control hole;

[0053] 7. Scraping device; 701. Piston rod; 702. Scraping ring; 703. Piston; 704. Spring 2; 705. Sludge collection chamber; 706. One-way valve 1; 707. Magnetic ring; 708. Sludge collection hole;

[0054] 8. Flow control device; 801. Magnetic column; 802. Guide column; 803. Spring three; 804. Center column; 805. Flow limiting column; 806. Flow blocking film;

[0055] 9. Drive unit; 901. Magnetic plate one; 902. Magnetic plate two; 903. Spiral plate;

[0056] 10. Stirring shaft; 11. Heat dissipation fins; 12. Fan blades; 13. Reset magnet; 14. Air inlet; 15. Bearing. Detailed Implementation

[0057] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0058] Please see Figures 1-11 A mechanical seal bushing structure for a three-in-one reactor includes a reactor, a protective shell 1 installed on the top of the reactor, a stirring shaft 10 rotatably connected to the reactor shaft, and a clamping ring 4. A bushing 2 is provided at the connection between the protective shell 1 and the reactor. A moving ring assembly 3 and a stationary ring assembly 5 are provided on the outside of the bushing 2. The moving ring assembly 3 and the stationary ring assembly 5 are used to ensure the sealing of the reactor. The clamping ring 4 is used to connect the stirring shaft 10 and the bushing 2.

[0059] A cooling device 6 is provided on the top side of the stationary ring assembly 5. The cooling device 6 is used to dissipate heat from the lubricant between the stationary ring assembly 5 and the moving ring assembly 3.

[0060] The cooling device 6 includes a cooling ring cylinder 602 and an air inlet 604. The cooling ring cylinder 602 has multiple airflow guiding and heat dissipation holes 606. The side wall of the cooling ring cylinder 602 has two equally spaced air inlets 604. Multiple heat dissipation fins 11 are fixedly connected to the outer side of the cooling ring cylinder 602.

[0061] The top of the cooling ring cylinder 602 is provided with an upper cover 601, and the bottom of the cooling ring cylinder 602 is provided with a lower cover 603. The lower cover 603 is connected to the liquid inlet of the stationary ring assembly 5, and the upper cover 601 is connected to the liquid outlet of the stationary ring assembly 5.

[0062] A partition is provided between the upper cover 601, the lower cover 603 and the inner wall of the protective shell 1 to restrict the guidance of the cooling airflow channel. The protective shell 1 has an air inlet 14 in the area between the upper cover 601 and the lower cover 603.

[0063] A fan blade 12 is fixedly connected to the outside of the upper cover 601 corresponding to the stirring shaft 10;

[0064] The rotation of the stirring shaft 10 drives the fan blades 12 to rotate, drawing in outside air through the air inlet 14. The airflow first blows onto the surface of the heat dissipation fins 11 for heat exchange, and then enters the internal cavity of the cooling ring cylinder 602 through the air inlet 604. Finally, it is discharged from the annular gap between the stirring shaft 10 and the top of the protective shell 1, forming a forced convection heat dissipation channel from bottom to top, thereby achieving the cooling of the lubricant.

[0065] Furthermore, the heat dissipation fins 11 are fan-shaped and distributed between the air inlets 604. The middle part of the heat dissipation fins 11 is aligned with the air inlet 14 opened in the protective shell 1, and the air inlets 604 and the air inlet 14 are staggered.

[0066] Furthermore, a pump for driving the flow of lubricating fluid is also provided in the lubricating fluid circulation circuit consisting of the stationary ring assembly 5, the upper cover 601, the cooling ring cylinder 602, and the lower cover 603.

[0067] During use, as the rotational speed of the stirring shaft 10 increases, the heat generated by friction between the moving ring assembly 3 and the stationary ring assembly 5 also increases. The continuous high temperature will cause the lubricant to deteriorate and reduce the service life of the moving ring assembly 3 and the stationary ring assembly 5.

[0068] When the stirring shaft 10 rotates at high speed, the operation of the fan blades 12 will generate an upward airflow in the cooling ring cylinder 602. At this time, the air pressure in the middle of the cooling ring cylinder 602 decreases, and the air outside the protective shell 1 blows through the air inlet 14 onto the outer surface of the heat dissipation fins 11 and flows to the air inlet 604. Through the continuous rotation of the stirring shaft 10, the airflow is discharged from the top of the stirring shaft 10, thus forming a heat dissipation cycle.

[0069] When the stirring shaft 10 operates at a low speed, the heat generated between the moving ring assembly 3 and the stationary ring assembly 5 is low. At this time, the cooling device 6 exchanges heat naturally with the outside air, which is sufficient to meet the heat dissipation requirements when operating at low speed. When the stirring shaft 10 operates at high speed, the negative pressure generated by the fan blade 12 in the cooling ring cylinder 602 increases, which can drive the outside air to circulate naturally to meet the heat dissipation requirements at high temperatures. The cooling device 6 automatically adjusts the heat dissipation intensity according to the working state of the stirring shaft 10.

[0070] A bearing 15 is provided on the top of the stationary ring assembly 5. The bearing 15 is used to ensure the stability of the working state of the stirring shaft 10. A clamping ring 4 connected to the stirring shaft 10 is provided on the top of the bearing 15.

[0071] The lubrication area of ​​bearing 15 is filled with lubricating fluid, and it is connected to the lubricating fluid between stationary ring assembly 5 and moving ring assembly 3.

[0072] Furthermore, when cooling the lubricant flowing between the stationary ring assembly 5 and the moving ring assembly 3, the lubrication area of ​​the bearing 15 can be cooled simultaneously.

[0073] When changing the lubricant, the process can be simplified by changing it simultaneously.

[0074] The upper cover 601 and the lower cover 603 are provided with a second flow channel 609 and a first flow channel 607 at the position corresponding to the flow guide heat dissipation hole 606. The upper cover 601 and the cooling ring cylinder 602 are provided with a first flow channel 605 on their adjacent surfaces. Under normal conditions, the first flow channel 605 is used to connect each second flow channel 609.

[0075] A flow groove 608 is provided on the side of the lower cover 603 adjacent to the cooling ring cylinder 602. The flow groove 608 is used to collect the liquid flowing out of each branch groove 607.

[0076] The cross-sectional area of ​​the multiple flow guiding and heat dissipation holes 606 is larger than the cross-sectional area of ​​the liquid inlet of the upper cover 601;

[0077] The upper cap 601 has one liquid inlet and the lower cap 603 has one liquid outlet.

[0078] Furthermore, the cross-sectional area of ​​the heat dissipation hole 606 is at least 1.6 times the cross-sectional area of ​​the liquid inlet of the upper cover 601.

[0079] When in use, when the lubricant in the stationary ring assembly 5 flows into the upper cover 601, the lubricant is diverted to each flow guide heat equalization hole 606 through the set flow groove 1 605 and flow divider 2 609. At this time, due to the increase in flow diameter, the flow speed of the lubricant is reduced.

[0080] Furthermore, when the lubricant flows from the upper cover 601 side to the lower cover 603 side, under the cooling effect of the airflow, the temperature of the lubricant in the heat dissipation hole 606 is reduced by the heat dissipation fins 11. This causes a large amount of sludge in the lubricant to remain and adhere to the inner wall of the heat dissipation hole 606. Through the dual effects of reducing the flow rate and cooling, the sludge is promoted to adhere to the inner wall of the heat dissipation hole 606, preventing it from accumulating in the stationary ring assembly 5 and the moving ring assembly 3, thereby affecting the service life of the moving ring assembly 3 and the stationary ring assembly 5.

[0081] A rotating ring assembly 3 is provided on the outer side of the bushing 2. The rotating ring assembly 3 includes a spring 302. The spring 302 is fixedly connected to the outer side of the bushing 2. A rotating ring spring frame 301 is slidably connected to both sides of the spring 302. Multiple rotating rings 303 are provided inside the spring 302. The spring 302 applies an elastic preload to the rotating ring spring frame 301.

[0082] A stationary ring assembly 5 is fixedly connected to the top of the reactor. The stationary ring assembly 5 includes a stationary ring seat 501, which is sleeved on the outside of the rotating ring spring frame 301. There is a gap between the stationary ring seat 501 and the rotating ring spring frame 301. A stationary ring 502 is fixedly connected to the end face of the stationary ring seat 501 corresponding to the rotating ring spring frame 301. The contact surface of the stationary ring 502 and the rotating ring spring frame 301 are tightly fitted.

[0083] A liquid inlet hole 503 is provided at the bottom of one side of the stationary ring seat 501, and a liquid outlet hole 504 is provided at the top of one side of the stationary ring seat 501. Lubricating fluid is input through the liquid inlet hole 503 and output through the liquid outlet hole 504.

[0084] Furthermore, the contact surfaces of the bushing 2 with the stirring shaft 10, and the contact surfaces of the bushing 2 with the moving ring spring frame 301 and the stationary ring 502 are all provided with rubber rings for sealing.

[0085] In use, by tightening the positioning screws on the clamping ring 4, the clamping ring 4 is fixedly connected to the outer wall of the stirring shaft 10. When the stirring shaft 10 rotates, the stirring shaft 10 drives the shaft sleeve 2 to rotate through the clamping ring 4. At this time, the moving ring assembly 3 rotates relative to the stationary ring assembly 5 under the drive of the shaft sleeve 2. At this time, the moving ring spring frame 301 is tightly fitted with the stationary ring 502 under the support of the moving ring 303, and under the action of the introduced lubricating fluid, a liquid film is formed between the moving ring spring frame 301 and the stationary ring 502, thereby ensuring the sealing of the reactor during operation.

[0086] A scraping device 7 is provided inside the heat dissipation hole 606. The scraping device 7 is used to clean the sludge adhering to the inner wall of the heat dissipation hole 606. The scraping device 7 includes a piston rod 701 and a sludge collection chamber 705. The piston rod 701 passes through the heat dissipation hole 606 and the second diversion groove 609. A piston 703 is fixedly connected to the bottom of the piston rod 701. The piston 703 is slidably connected in the second diversion groove 609, the heat dissipation hole 606, and the first diversion groove 607. A scraping ring 702 is provided on the top side of the piston 703. The scraping ring 702 is used to scrape the sludge. The scraping ring 702 is slidably connected to the piston rod 701. A second spring 704 is provided between the scraping ring 702 and the piston 703. The second spring 704 is used to control the movement gap between the scraping ring 702 and the piston 703.

[0087] A through hole is provided on the piston 703 to connect the gap between the scraping ring 702 and the piston 703.

[0088] Diverter 2 609 penetrates the upper cover 601. A sludge collection chamber 705 is fixedly connected to one end of the diverter 2 609 away from the cooling ring cylinder 602. A sludge collection hole 708 is opened on the side of the sludge collection chamber 705 near the cooling ring cylinder 602. A one-way valve 706 is installed in the sludge collection chamber 705. The one-way valve 706 is used to temporarily place the liquid input from the sludge collection hole 708 into the sludge collection chamber 705.

[0089] The gap between the sludge collection chamber 705 and the top of the cooling ring cylinder 602 corresponds to the gap between the scraping ring 702 and the piston 703;

[0090] The top of the piston rod 701 passes through the sludge collection chamber 705, and a magnetic ring 707 is fixedly connected to the top of the sludge collection chamber 705.

[0091] A reset magnet 13 is provided on the top of the protective housing 1, and the reset magnet 13 corresponds to the magnetic ring 707.

[0092] Furthermore, the one-way valve 706 includes a sealing plug for sealing the sludge collection hole 708. A flow-blocking spring is provided on one side of the sealing plug, and the sealing plug is tightly fitted to the sludge collection hole 708 under the action of the flow-blocking spring.

[0093] Furthermore, a frustum-shaped groove is provided on the side of piston 703 near the sludge collection hole 708, and a matching frustum-shaped groove is provided on the side of sludge collection hole 708 near piston 703. When the two come into contact, their surfaces gradually fit together.

[0094] Furthermore, the sludge collection chamber 705 has multiple guide grooves on the boss surface corresponding to the sludge collection hole 708, and these grooves are evenly distributed on the boss surface of the sludge collection chamber 705.

[0095] Furthermore, the surface of piston 703 is provided with a valve diaphragm that allows one-way flow from one side of lower cover 603 to the side of upper cover 601.

[0096] Furthermore, each sludge collection chamber 705 is connected to a sludge storage tank, which is used to collect the mixture of sludge and lubricating fluid and to reuse the lubricating fluid after the sludge has settled.

[0097] When in use, when the lubricant enters the second distribution groove 609 from the upper cover 601, the lubricant will push the scraper ring 702 and piston 703 along the axial direction of the heat dissipation hole 606 towards the lower cover 603 until the scraper ring 702 and piston 703 are pushed by the lubricant into the first distribution groove 607 of the lower cover 603. At this time, the lubricant enters the second flow groove 608 through the second distribution groove 609 and the heat dissipation hole 606, and flows back into the stationary ring assembly 5. After long-term operation, a certain amount of sludge will adhere to the inner wall of the heat dissipation hole 606 under the action of flow rate and temperature.

[0098] At this time, by pulling the piston rod 701, the scraper ring 702 and piston 703 are moved away from the lower cover 603. At this time, the scraper ring 702 will scrape the inside of the flow guide heat equalization hole 606 and carry away the sludge on the inner wall of the flow guide heat equalization hole 606 until the scraper ring 702 and piston 703 separate from the flow guide heat equalization hole 606 and enter the second flow divider 609. As the scraper ring 702 and the sludge collection chamber 705 gradually approach each other, the pressure between them gradually increases with the movement of the piston rod 701. When the piston 703 moves up to compress the chamber, the internal pressure exceeds the opening pressure of the one-way valve 706. The sealing plug overcomes the spring force of the flow resistance spring and opens the sludge collection hole 708. The sludge and lubricant carried on the top of the scraper ring 702 are squeezed into the sludge collection chamber 705.

[0099] As the piston rod 701 continues to move, the piston 703 continues to move upward. At this time, the piston 703 squeezes the second spring 704, causing the second spring 704 to contract. Through the reduction of the cavity volume between the scraper ring 702 and the piston 703, the lubricant between the scraper ring 702 and the piston 703 is squeezed into the top of the scraper ring 702, and the scraper ring 702 and the sludge collection chamber 705 are flushed, improving the cleaning effect on the surface of the sludge collection chamber 705.

[0100] When the piston rod 701 moves upward to its limit position, the magnetic ring 707 approaches the reset magnet 13. At this time, the external force is removed, and the magnetic repulsion between the reset magnet 13 and the magnetic ring 707 drives the piston rod 701 to slide downward to reset, and slides the scraping ring 702 and the piston 703 into the heat dissipation hole 606.

[0101] A flow control hole 610 is provided on the flow channel 605 between the two flow dividers 609. A flow control device 8 is provided in the flow control hole 610. The flow control device 8 is used to control the flow direction of the lubricating fluid.

[0102] The flow control device 8 includes a central column 804 and a spring 803. The spring 803 is installed inside the cooling ring cylinder 602. The upper and lower ends of the central column 804 are fixedly connected to guide columns 802. The middle part of the central column 804 is fixedly connected to a flow-limiting column 805. The flow-limiting column 805 has multiple axially penetrating through holes. A flow-blocking film 806 is provided on the side of the flow-limiting column 805 away from the spring 803.

[0103] The guide post 802 is slidably connected inside the flow control hole 610, and a magnetic post 801 is fixedly connected to the top of the guide post 802. The top of the magnetic post 801 protrudes from the upper cover 601.

[0104] The top of the protective housing 1 is provided with a drive device 9, which is used to drive the scraping device 7 and the flow control device 8 to work.

[0105] The drive device 9 includes a magnetic plate 901, which is rotatably connected inside the protective housing 1. A spiral plate 903 is fixedly connected to the inner wall of the magnetic plate 901. The bottom side of the spiral plate 903 corresponds to the top of the piston rod 701. A magnetic plate 902 is fixedly connected to the inner wall of the magnetic plate 901. The magnetic plate 902 corresponds to the bottom side of the magnetic column 801.

[0106] Furthermore, the magnetic plate 901 is driven by a gear transmission mechanism and a stepper motor. The stepper motor drives the gear to rotate and mesh with the gear on the outside of the magnetic plate 901, thereby achieving the purpose of controlling the rotation of the magnetic plate 901.

[0107] Furthermore, the magnetic plate 901 rotates slowly to collect the scraped oil stains within the groove of the scraping ring 702 as much as possible.

[0108] Furthermore, the flow groove 605 on the cooling ring cylinder 602 is only connected to one of the heat dissipation holes 606. The depths of the flow grooves 605 on both sides of the flow control hole 610 are different. The depth of the flow groove 605 corresponding to the flow groove 605 on the upper cover 601 and the cooling ring cylinder 602 is shallower than the depth of the groove on the other side of the flow control hole 610.

[0109] When the current-limiting column 805 moves downward under the repulsive force of the magnetic plate 902, the current-limiting column 805 can block the shallow flow groove 605 on the magnetic column 801.

[0110] In use, as the magnetic plate 901 rotates, the spiral plate 903 rotates and moves to the position corresponding to the bottom of the piston rod 701. Under the rotation of the magnetic plate 901, the piston rod 701 is gradually dragged upward until the piston rod 701 disengages from the spiral plate 903. At this time, the magnetic ring 707 slides downward and resets under the repulsive force of the reset magnet 13.

[0111] When cleaning one of the heat dissipation holes 606, it is necessary to control the flow control devices 8 on both sides of the heat dissipation hole 606 to cut off the input end of the heat dissipation hole 606. When the spiral plate 903 is about to make support contact with the piston rod 701 in the heat dissipation hole 606, the magnetic plate 902 on the magnetic plate 901 moves to the top of the magnetic column 801 as the magnetic plate 901 rotates, and slides down under the action of magnetic repulsion, so that the flow limiting column 805 blocks the flow groove 605 between the cap 601 and the cooling ring cylinder 602.

[0112] As the piston rod 701 moves upward, the lubricant accumulated on the top of the scraper ring 702 can flow along the flow groove 605 on the cooling ring cylinder 602 to the bottom side of the flow-limiting column 805, and flow out from the top of the flow-limiting column 805 back into the cooling circulation passage, thereby reducing the loss of lubricant during a single cleaning process.

[0113] Working principle: First, the stirring shaft 10 drives the shaft sleeve 2 and the moving ring assembly 3 to rotate through the clamping ring 4. Under the elastic pre-tightening force of the spring 302, the moving ring assembly 3 is tightly fitted with the stationary ring assembly 5. With the lubricating fluid introduced, a liquid film is formed between the moving ring spring frame 301 and the stationary ring 502, thereby ensuring the sealing of the reactor.

[0114] Secondly, the cooling device 6 uses the rotation of the stirring shaft 10 to drive the fan blades 12 to rotate, drawing in outside air through the air inlet 14 of the protective shell 1. The airflow first blows on the surface of the heat dissipation fins 11 for heat exchange, and then flows through the air inlet 604 into the cavity between the stirring shaft 10 and the upper cover 601. Finally, it is discharged through the gap between the stirring shaft 10 and the top of the protective shell 1, forming a forced convection heat dissipation channel to cool the lubricant.

[0115] Meanwhile, when the lubricant flows in the heat dissipation hole 606, the lubricant reduces the flow rate and cools down the heat dissipation fins 11, causing the sludge to adhere and settle on the inner wall of the heat dissipation hole 606, thus preventing the sludge from accumulating on the sealing surface.

[0116] Finally, in the self-cleaning stage, when it is necessary to clean the attached sludge, the drive device 9 drives the piston rod 701 of the scraping device 7 to slide through the magnetic plate 901 and the spiral plate 903. The scraping ring 702 moves along the inner wall of the heat dissipation hole 606 to scrape off the sludge, and through the squeezing action, the dirt is discharged into the collection chamber 705 through the collection hole 708, so as to realize the periodic cleaning and recycling of lubricating fluid.

[0117] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mechanical seal bush structure for a three-in-one kettle, comprising a reaction kettle, a protective shell (1) mounted on the top of the reaction kettle, a stirring shaft (10) rotatably connected at the shaft center of the reaction kettle, and a clamping ring (4), characterized in that: The protective shell (1) is provided with a shaft sleeve (2) at the connection with the reaction kettle, the outer side of the shaft sleeve (2) is provided with a dynamic ring assembly (3) and a static ring assembly (5), the dynamic ring assembly (3) and the static ring assembly (5) are used for ensuring the sealing of the reaction kettle, and the clamping ring (4) is used for connecting the stirring shaft (10) and the shaft sleeve (2); The top side of the static ring assembly (5) is provided with a cooling device (6), and the cooling device (6) is used for heat dissipation of the lubricating liquid between the static ring assembly (5) and the dynamic ring assembly (3); The cooling device (6) comprises a cooling ring cylinder (602) and air inlet holes (604), a plurality of flow guiding and heat equalizing holes (606) are formed in the cooling ring cylinder (602), and two air inlet holes (604) are formed in the side wall of the cooling ring cylinder (602) at equal intervals; a plurality of heat dissipation fins (11) are fixedly connected to the outer side of the cooling ring cylinder (602); The top of the cooling ring cylinder (602) is provided with an upper cover (601), and the bottom of the cooling ring cylinder (602) is provided with a lower cover (603); the lower cover (603) is communicated with the liquid inlet of the static ring assembly (5), and the upper cover (601) is communicated with the liquid outlet of the static ring assembly (5); The upper cover (601) and the lower cover (603) are provided with a partition plate between the inner wall of the protective shell (1), which is used for guiding the cooling air flow channel; the protective shell (1) is provided with an air inlet (14) corresponding to the region between the upper cover (601) and the lower cover (603); The outer side of the stirring shaft (10) corresponding to the upper cover (601) is fixedly connected with a fan blade (12); The rotation of the stirring shaft (10) drives the rotation of the fan blade (12), and the external air is sucked into through the air inlet (14); the air flow first blows on the surface of the heat dissipation fin (11) to exchange heat, and then enters the internal cavity of the cooling ring cylinder (602) through the air inlet hole (604), and finally is discharged from the annular gap between the stirring shaft (10) and the top of the protective shell (1), thereby forming a forced convection heat dissipation channel from bottom to top, and thus the cooling of the lubricating liquid is realized; The upper cover (601) and the lower cover (603) are provided with a second flow distribution groove (609) and a first flow distribution groove (607) corresponding to the positions of the flow guiding and heat equalizing holes (606); the upper cover (601) and the cooling ring cylinder (602) are provided with a first flow channel (605) on the adjacent surfaces; under normal circumstances, the first flow channel (605) is used for connecting the second flow distribution grooves (609); The lower cover (603) and the cooling ring cylinder (602) are provided with a second flow channel (608) on the adjacent surfaces; the second flow channel (608) is used for collecting the liquid discharged from the first flow distribution grooves (607); The cross-sectional area of the plurality of flow guiding and heat equalizing holes (606) is greater than that of the liquid inlet of the upper cover (601); The number of the liquid inlets of the upper cover (601) and the liquid outlets of the lower cover (603) is one. The guide flow uniform heating hole (606) is provided with a scraping device (7), the scraping device (7) is used for cleaning the oil sludge attached to the inner wall of the guide flow uniform heating hole (606), the scraping device (7) includes a piston rod (701), a dirt collecting cavity (705), the piston rod (701) penetrates the guide flow uniform heating hole (606), the shunt groove two (609), the bottom of the piston rod (701) is fixedly connected with a piston (703), the piston (703) is slidably connected in the shunt groove two (609), the guide flow uniform heating hole (606), the shunt groove one (607), the top side of the piston (703) is provided with a scraping ring (702), the scraping ring (702) is used for scraping the oil sludge, the scraping ring (702) is slidably connected on the piston rod (701), a spring two (704) is arranged between the scraping ring (702) and the piston (703), and the spring two (704) is used for controlling the movement gap between the scraping ring (702) and the piston (703). A through hole is formed in the piston (703), and is used for communicating the gap between the scraping ring (702) and the piston (703).

2. The mechanical seal bushing structure for a three-in-one kettle according to claim 1, characterized in that: The top of the static ring assembly (5) is provided with a bearing (15), the bearing (15) is used for guaranteeing the stability of the working state of the stirring shaft (10), and the top of the bearing (15) is provided with a clamping ring (4) connected with the stirring shaft (10). The lubrication area of the bearing (15) is filled with lubricating liquid, which communicates with the lubricating liquid between the static ring assembly (5) and the dynamic ring assembly (3).

3. The mechanical seal bushing structure for a three-in-one kettle according to claim 1, characterized in that: The outer side of the shaft sleeve (2) is provided with a dynamic ring assembly (3), the dynamic ring assembly (3) includes a spring one (302), the outer side of the shaft sleeve (2) is fixedly connected with the spring one (302), the spring one (302) is slidably connected with a dynamic ring spring frame (301) on both sides, a plurality of dynamic rings (303) are arranged in the spring one (302), and the spring one (302) exerts elastic pre-tightening force on the dynamic ring spring frame (301). The top of the reaction kettle is fixedly connected with a static ring assembly (5), the static ring assembly (5) includes a static ring seat (501), the static ring seat (501) is sleeved on the outer side of the dynamic ring spring frame (301), there is a gap between the static ring seat (501) and the dynamic ring spring frame (301), the static ring seat (501) is fixedly connected with a static ring (502) at the end face corresponding to the dynamic ring spring frame (301), and the contact surface of the static ring (502) and the dynamic ring spring frame (301) is tightly attached.

4. The mechanical seal bushing structure for a three-in-one kettle according to claim 3, characterized in that: A liquid inlet hole (503) is formed in the bottom of one side of the static ring seat (501), a liquid outlet hole (504) is formed in the top of one side of the static ring seat (501), and the lubricating liquid is input from the liquid inlet hole (503) and output from the liquid outlet hole (504).

5. The mechanical seal bushing structure for a three-in-one kettle according to claim 1, characterized in that: The second flow distribution groove (609) penetrates the upper cover (601), and one end of the second flow distribution groove (609) away from the cooling ring cylinder (602) is fixedly connected with a dirt collecting cavity (705), one side of the dirt collecting cavity (705) close to the cooling ring cylinder (602) is provided with a dirt collecting hole (708), and the dirt collecting cavity (705) is provided with a one-way valve (706). The gap between the dirt collecting cavity (705) and the top of the cooling ring cylinder (602) corresponds to the gap between the scraping ring (702) and the piston (703). The top of the piston rod (701) penetrates the dirt collecting cavity (705), and the top of the dirt collecting cavity (705) is fixedly connected with a magnetic ring (707). The top of the protective shell (1) is provided with a reset magnet (13), and the reset magnet (13) corresponds to the magnetic ring (707).

6. The mechanical seal bushing structure for a three-in-one kettle according to claim 1, characterized in that: The flow distribution groove (605) between the second flow distribution groove (609) is provided with a flow control hole (610), the flow control hole (610) is provided with a flow control device (8), and the flow control device (8) is used for controlling the flow direction of the lubricating liquid. The flow control device (8) comprises a center column (804) and a spring (803), the spring (803) is arranged in the cooling ring cylinder (602), the upper and lower ends of the center column (804) are fixedly connected with guide columns (802), the middle part of the center column (804) is fixedly connected with a flow limiting column (805), a plurality of through holes are formed in the flow limiting column (805), and the side of the flow limiting column (805) away from the spring (803) is provided with a flow resistance film (806). The guide column (802) is slidably connected in the flow control hole (610), the top of the guide column (802) is fixedly connected with a magnetic column (801), and the top of the magnetic column (801) protrudes from the upper cover (601).

7. The mechanical seal bushing structure for a three-in-one kettle according to claim 6, characterized in that: The top of the protective shell (1) is provided with a driving device (9), and the driving device (9) is used for driving the scraping device (7) and the flow control device (8) to work. The driving device (9) comprises a magnetic plate (901), the magnetic plate (901) is rotatably connected in the protective shell (1), the inner wall of the magnetic plate (901) is fixedly connected with a spiral plate (903), the bottom side of the spiral plate (903) corresponds to the top of the piston rod (701), the inner wall of the magnetic plate (901) is fixedly connected with a magnetic plate (902), and the magnetic plate (902) corresponds to the bottom side of the magnetic column (801).

Images