An intelligent sealing system and method for a rotating cylinder and a fixed material box

Abstract

The present invention discloses an intelligent sealing system and method for a rotating cylinder and a fixed material box. The system includes a rotating ring and a fixed ring that contact each other between the rotating cylinder and the fixed material box, a plane sealing pair is formed between the two and a pressure sensor is provided, and the other side is connected to the rotating ring seat and the fixed ring seat, and the fixed ring seat is connected to a pressure regulating mechanism, a flexible support mechanism, and an expansion joint, and the pressure sensor and the pressure regulating mechanism are respectively connected to a controller. The intelligent sealing system of the present invention can timely adjust the contact pressure ratio of the sealing surface with the changes of the beating, swinging, axial movement, etc. of the rotating cylinder under the mutual cooperation of the elastic mechanism and the sealing regulating mechanism to ensure the effective sealing of the sealing surface, and has the advantages of high adaptability, good sealing effect, small wear, high reliability, long service life, easy maintenance and replacement, etc., and can timely and effectively regulate the sealing effect between the rotating cylinder and the fixed material box, which is of great significance for promoting the widespread use of equipment such as rotary kilns.

Description

Technical Field

[0001] The invention belongs to the technical field of rotary kilns and relates to an intelligent sealing system and method for a rotary cylinder and a fixed material box. Background Art

[0002] The rotary kiln mainly includes a fixed material box (including a feed box and a discharge box), a rotary cylinder, a sealing system between the fixed material box and the rotary cylinder, a roller device, a roller ring, a wheel block device, a gear ring cover, a gear ring, a transmission device, etc. The rotary kiln is usually a round long cylindrical structure, which is tilted and placed on an array of parallel rollers. After the output speed of the motor is reduced by the reducer, the roller ring fixed on the rotary cylinder is driven by gears or chains to make the rotary cylinder rotate. When the rotary kiln is operating normally, the material enters the rotary kiln cylinder from the kiln head through the feeder (feed box). Because the rotary cylinder has a certain inclination, the material rotates with the rotary cylinder in the rotary cylinder and gradually moves from the kiln head to the kiln tail, and then is discharged from the kiln tail end through the discharge box. The waste gas generated by the material treatment is treated by the tail gas treatment device and discharged after meeting the standards. At present, the sealing system of the rotary cylinder and the fixed material box often adopts the sealing system such as labyrinth seal, gas seal, laminated seal, etc. However, due to the large size of the rotary kiln and the high operating temperature, it is inevitable that there will be jumping, swinging, axial movement and the like during operation, which makes it difficult to seal the connection part between the rotary cylinder and the fixed material box. In addition, the sealing system of the rotary cylinder and the fixed material box in the prior art also has the following defects: low adaptability to the shape error of the rotary cylinder, the installation coaxiality deviation, the radial runout and axial movement during operation, poor sealing performance, low reliability, short service life, and difficult inspection and maintenance. Therefore, it is of great significance to obtain an intelligent sealing system and method for the rotary cylinder and the fixed material box, which has high adaptability to the shape error of the cylinder, the installation coaxiality deviation, the radial runout and axial movement of the cylinder during operation, good sealing effect, small wear, high reliability, long service life, and easy inspection and replacement, so as to improve the sealing effect during the use of the rotary kiln and promote the widespread use of the rotary kiln. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an intelligent sealing system and method for a rotary drum and a fixed material box with high adaptability, good sealing effect, low wear, high reliability, long service life, and easy maintenance and replacement.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An intelligent sealing system for a rotating cylinder and a fixed material box, comprising a sealing ring arranged between the rotating cylinder and the fixed material box, the sealing ring comprising a rotating ring and a fixed ring contacting each other, the rotating ring rotates relative to the fixed ring and a plane-plane end face sealing pair (referred to as a plane sealing pair) is formed between the rotating ring and the fixed ring; the rotating ring is detachably connected to a rotating ring seat on the side close to the rotating cylinder, the rotating ring seat is fixed and sealingly connected to the rotating cylinder, and the inner circumferential surface of the rotating ring seat is sealingly connected to the outer circumferential surface of the rotating cylinder; the fixed ring is detachably connected to the fixed ring seat on the side close to the fixed material box, An expansion joint is provided between the fixed ring seat and the fixed material box, and the fixed ring seat is sealed and connected to the fixed material box through the expansion joint; the fixed ring seat is connected to a pressure regulating mechanism on the side close to the fixed material box for regulating the contact pressure ratio between the rotating ring and the fixed ring, specifically, the pressure regulating mechanism is connected to the circular end face of the fixed ring seat; a flexible supporting mechanism is connected to the bottom of the fixed ring seat; a pressure sensor for monitoring the contact pressure ratio between the rotating ring and the fixed ring is provided between the fixed ring and the fixed ring seat; a controller is connected to the pressure sensor; and the controller is connected to the pressure regulating mechanism.

[0006] As a further improvement of the above technical solution: the pressure regulating mechanism includes at least two fluid pressure cylinders and a pressure regulating valve for regulating the fluid pressure in the fluid pressure cylinder, the piston rod of each fluid pressure cylinder is connected to the circular end face of the fixed ring seat, and further preferably, the connection between the piston rod and the fixed ring seat is hinged, and the fluid inlet of the fluid pressure cylinder is connected to the outlet end of the pressure regulating valve.

[0007] As a further improvement of the above technical solution: the fluid pressure cylinder is a hydraulic cylinder or a gas cylinder; the pressure regulating valve is connected to the controller.

[0008] As a further improvement of the above technical solution: when in use, the fluid pressure of the fluid pressure cylinder is adjusted by the pressure regulating valve so that the contact pressure ratio between the slewing ring and the fixed ring is 20 kPa to 120 kPa.

[0009] As a further improvement of the above technical solution: when in use, the fluid pressure of the fluid pressure cylinder is adjusted by the pressure regulating valve so that the contact pressure ratio between the slewing ring and the fixed ring is 50 kPa to 90 kPa.

[0010] As a further improvement of the above technical solution: the flexible support mechanism includes at least one set of flexible support components; each set of the flexible support components is arranged in a vertical plane of the axis of the fixed ring seat; the bottom of each set of the flexible support components is connected to the rigid component; and a sliding pair is also provided between the flexible support component and the rigid component.

[0011] As a further improvement of the above technical solution: the rigid component is one of the ground, the floor, and the steel platform.

[0012] As a further improvement of the above technical solution: the sliding pair adopts a combination mechanism of a guide rail and a slider, or a combination mechanism of a roller and a guide rail, or a combination structure of a linear bearing and a guide rail.

[0013] As a further improvement of the above technical solution: the flexible support component includes one of a spring support component, a rubber support component, a pneumatic support component, and a hydraulic support component.

[0014] As a further improvement of the above technical solution: the expansion joint is a metal expansion joint or a non-metal expansion joint.

[0015] As a further improvement of the above technical solution: the sealing ring is an integral sealing ring or a split sealing ring.

[0016] As a further improvement of the above technical solution: the split sealing ring is composed of at least two circular ring segments with the same inner diameter and outer diameter that are detachably overlapped or thin-layer welded.

[0017] As a further improvement of the above technical solution: the split sealing ring is composed of two semi-circular rings with the same inner diameter and outer diameter which are detachably overlapped or thinly welded.

[0018] As a further improvement of the above technical solution: the fixed material box is a feed box and / or a discharge box

[0019] As a further improvement of the above technical solution: a circumferential limit stop is provided between the slewing ring and the slewing ring seat.

[0020] As a further improvement of the above technical solution: a circumferential limit stop is provided between the fixing ring and the fixing ring seat.

[0021] As a further improvement of the above technical solution: the fixed ring seat is provided with at least two oil filling holes on the side close to the fixed material box, each of the oil filling holes penetrates the fixed ring seat and the fixed ring and extends to the sealing surface of the planar sealing pair, and the other end of each oil filling hole is connected to an oil filling pump.

[0022] As a further improvement of the above technical solution: the output port of the oil filling hole is a circumferential arc groove or a cylindrical hole; the output port of the oil filling hole is distributed on the circumference of a concentric circle.

[0023] As a further improvement of the above technical solution: lubricant is injected into the oil filling hole; the lubricant is a liquid lubricant or grease.

[0024] As a further improvement of the above technical solution: the oil injection pump is one of a gear pump, a screw pump, a plunger pump, a cam pump, a peristaltic pump, and a vane pump.

[0025] As a further improvement of the above technical solution: a countersunk groove or a countersunk hole is provided in the fixing ring seat; the countersunk groove or the countersunk hole faces the fixing ring.

[0026] As a further improvement of the above technical solution: the pressure sensor is installed in the sink or sink hole.

[0027] As a further improvement of the above technical solution: the pressure sensor is at least one of a strain gauge pressure sensor, a piezoelectric pressure sensor, and a capacitive pressure sensor.

[0028] As a further improvement of the above technical solution: the controller and the pressure sensor are connected by wire or wirelessly.

[0029] As a further improvement of the above technical solution: the controller and the pressure regulating mechanism are connected by wire or wirelessly.

[0030] As a general technical concept, the present invention also provides an intelligent sealing method of the above-mentioned intelligent sealing system, comprising the following steps:

[0031] S1. During the operation of the intelligent sealing system, using the pressure sensor to monitor the contact pressure ratio at different positions between the slewing ring and the fixed ring in real time;

[0032] S2, transmitting the contact pressure ratio at different positions between the slewing ring and the fixed ring obtained in step S1 to the controller for data analysis, and determining the contact pressure ratio adjustment amount at different positions between the slewing ring and the fixed ring according to a preset contact pressure ratio target range;

[0033] S3, transmitting the contact pressure ratio adjustment amount at different positions between the rotating ring and the fixed ring obtained in step S1 to the pressure regulating mechanism, and using the pressure regulating mechanism to adjust the contact pressure ratio at different positions between the rotating ring and the fixed ring in real time, so that the contact pressure ratio between the rotating ring and the fixed ring is within a preset contact pressure ratio target range;

[0034] S4, repeating steps S1 to S3 to ensure that the rotary cylinder and the fixed material box are always sealed.

[0035] As a further improvement of the above technical solution: in step S3, when the contact pressure ratio at different positions between the rotating ring and the fixed ring is adjusted in real time by using the pressure regulating mechanism, the difference of the contact pressure ratio at different positions is controlled to be ≤6kPa.

[0036] Compared with the prior art, the advantages of the present invention are:

[0037] (1) In the intelligent sealing system of the present invention, a rotating ring and a fixed ring in contact with each other are arranged between the rotating cylinder and the fixed material box. The rotating ring rotates relative to the fixed ring and a plane sealing pair is formed between the rotating ring and the fixed ring. At the same time, a rotating ring seat and a fixed ring seat are detachably connected on the side of the rotating ring and the fixed ring away from the plane sealing pair, and the inner circumferential surface of the rotating ring seat is fixed and sealed to the outer circumferential surface of the rotating cylinder, and the fixed ring seat is sealed to the fixed material box through an expansion joint, thereby achieving effective sealing between the rotating cylinder and the fixed material box. The system has the advantages of simple structure and easy use. On this basis, in the pressure regulating mechanism and the flexible support Under the joint action of the support mechanism and the expansion joint, an elastic mechanism with pre-tightening, compensation and buffering functions is formed between the rotating cylinder and the fixed material box. The elastic mechanism can always maintain sufficient elasticity, so that the fixed ring has good tracking performance and can flexibly move in all directions, compensate for the sealing angle deflection and axial movement of the rotating ring caused by the centering error between the rotating ring and the fixed ring, keep the sealing surface of the rotating ring and the sealing surface of the fixed ring straight and parallel, so that the sealing pair between the rotating ring and the fixed ring has a good film pressure distribution, realizes parallel contact and good fit of the sealing surface, improves the dynamic stability and sealing performance of the sealing pair, prolongs the service life of the sealing pair, and reduces the life of the sealing pair. Life cycle cost, more importantly, under the joint action of the pressure sensor, the pressure regulating mechanism and the controller, a sealing regulating mechanism is formed between the rotating cylinder and the fixed material box, and the sealing regulating mechanism can adjust the contact pressure ratio between the rotating ring and the fixed ring in real time, so that the rotating cylinder and the fixed material box are always kept in a sealed state. Specifically: during the operation of the rotating cylinder, the pressure sensor is used to monitor the contact pressure ratio at different positions between the rotating ring and the fixed ring in real time, and these contact pressure ratio values ​​are transmitted to the controller for data analysis, thereby determining the contact pressure ratio adjustment amount at different positions between the rotating ring and the fixed ring according to the actual situation, and then in the control Under the control of the device, the contact pressure ratio adjustment amount at different positions is transmitted to the pressure regulating mechanism, and the pressure regulating mechanism is used to intelligently regulate the force applied to different positions of the fixed ring seat to ensure that the contact pressure ratio between the rotating ring and the fixed ring is always maintained within the set target range, so that the rotating cylinder and the fixed material box are finally kept in a sealed state. It can be seen that under the action of the sealing regulating mechanism, it can ensure that the sealing surface is always in contact to avoid failure due to the opening of the sealing surface, and can also reduce the adverse effects of sealing surface wear, thermal cracking and other adverse effects caused by the large contact pressure ratio of the sealing surface, thereby improving the reliability of the sealing pair, extending the service life of the sealing pair, and reducing the power consumption and life cycle cost of the sealing pair.The intelligent sealing system of the present invention, with the cooperation of the elastic mechanism and the sealing control mechanism, can timely adjust the contact specific pressure of the sealing surface as the jumping, swinging, axial movement and other changes of the rotating cylinder during operation, so that the intelligent sealing system can always maintain excellent sealing performance while effectively improving the stability and reliability of the intelligent sealing system. It not only has high adaptability to cylinder shape errors, installation coaxiality deviations, and radial jumping and axial movement of the cylinder during operation, but also has the advantages of good sealing effect, low wear, high reliability, long service life, easy maintenance and replacement, etc. As a new sealing system with excellent sealing performance, good stability and reliability, and long service life, it can timely and effectively control the sealing effect between the rotating cylinder and the fixed material box, and avoid secondary pollutant defects during use, which is of great significance for promoting the widespread use of rotary kilns.

[0038] (2) In the present invention, at least two fluid pressure cylinders are arranged on the fixed ring seat, and the piston rod of each fluid pressure cylinder is hinged on the circular ring end face of the fixed ring seat. By distributing the piston rods of the fluid pressure cylinders relatively evenly on the circular ring end face of the fixed ring seat close to the fixed material box, the force can be transmitted to the fixed ring relatively evenly, thereby reducing the deformation of the sealing ring caused by different forces applied to the fixed ring, which is beneficial to the uniform force and wear of the sealing surfaces of the large-diameter fixed ring and the rotating ring, improving the sealing reliability and extending the sealing life.

[0039] (3) In the present invention, at least one set of flexible support components is arranged on the fixed ring seat, and each set of flexible support components is arranged in a vertical plane of the axis of the fixed ring seat. The flexible support components can slide along the axial direction on the rigid component with the help of a sliding pair, so that the flexible support components have good axial follow-up performance to adapt to the axial displacement of the fixed ring seat caused by the expansion joint expansion and contraction, etc., reduce the constraint stress of related components caused by the axial displacement, and improve the reliability and output rate of the device.

[0040] (4) The present invention also provides an intelligent sealing method for an intelligent sealing system. During the operation of the rotating cylinder, a pressure sensor is used to monitor the contact pressure ratio values ​​at different positions between the rotating ring and the fixed ring in real time, and data analysis is performed in a controller. According to a preset contact pressure ratio target range, the contact pressure ratio adjustment amount at different positions between the rotating ring and the fixed ring is determined. Then, according to the contact pressure ratio adjustment amount at different positions, the contact pressure ratio at different positions between the rotating ring and the fixed ring is adjusted in real time through a pressure regulating mechanism, so that the contact pressure ratio between the rotating ring and the fixed ring is within the preset contact pressure ratio target range. Therefore, during the operation of the rotating cylinder, the contact pressure ratio between the rotating ring and the fixed ring can be adjusted in time according to changes in external conditions, and it can be ensured that the rotating cylinder and the fixed material box are always kept in a sealed state.

[0041] (5) In the intelligent sealing method of the present invention, when the pressure regulating mechanism is used to adjust the contact pressure ratio at different positions between the rotating ring and the fixed ring in real time, the difference in the contact pressure ratio at different positions is controlled to be ≤6 kPa. By controlling the difference in the contact pressure ratio at different positions, the wear of the rotating ring and the fixed ring can be reduced while ensuring the performance of the sealing pair, thereby greatly reducing the life cycle cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0043] Figure 1 This is a schematic diagram of the structure of the intelligent sealing system in Example 1 of the present invention.

[0044] Legend:

[0045] 1. Rotating cylinder; 2. Rotating ring seat; 3. Rotating ring; 4. Fixed ring; 5. Flexible supporting component; 6. Fixed ring seat; 7. Sliding pair; 8. Expansion joint; 9. Fixed material box; 10. Pressure regulating valve; 11. Fluid pressure cylinder; 12. Piston rod; 13. Pressure sensor; 14. Oil filling hole; 15. Bolt. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0048] Example 1

[0049] like Figure 1As shown, the intelligent sealing system of the rotating cylinder and the fixed material box of this embodiment includes a sealing ring arranged between the rotating cylinder 1 and the fixed material box 9, the sealing ring includes a rotating ring 3 and a fixed ring 4 that are in contact with each other, the rotating ring 3 rotates relative to the fixed ring 4 and a plane sealing pair is formed between the rotating ring 3 and the fixed ring 4, the rotating ring 3 is detachably connected to a rotating ring seat 2 on the side close to the rotating cylinder 1, and the rotating ring seat 2 is fixedly connected to the rotating cylinder 1, specifically, the inner circumferential surface of the rotating ring seat 2 is fixedly and sealingly connected to the outer circumferential surface of the rotating cylinder 1, and the fixed ring 4 is detachably connected to the side close to the fixed material box 9. A fixed ring seat 6 is disassembled and connected, an expansion joint 8 is provided between the fixed ring seat 6 and the fixed material box 9, the fixed ring seat 6 is sealed with the fixed material box 9 through the expansion joint 8, the fixed ring seat 6 is connected with a pressure regulating mechanism for adjusting the contact pressure ratio between the rotating ring 3 and the fixed ring on the side close to the fixed material box 9, a flexible supporting mechanism is connected to the bottom of the fixed ring seat 6, a pressure sensor 13 for monitoring the contact pressure ratio between the rotating ring 3 and the fixed ring 4 is provided between the fixed ring 4 and the fixed ring seat 6, a controller (not shown in the figure) is connected to the pressure sensor 13, and the controller is connected to the pressure regulating mechanism.

[0050] In the intelligent sealing system of the present invention, a rotating ring and a fixed ring that are in contact with each other are arranged between the rotating cylinder and the fixed material box, the rotating ring rotates relative to the fixed ring and a plane sealing pair is formed between the rotating ring and the fixed ring, at the same time, a rotating ring seat and a fixed ring seat are detachably connected on the side of the rotating ring and the fixed ring away from the plane sealing pair, and the inner circumferential surface of the rotating ring seat is fixed and sealed to the outer circumferential surface of the rotating cylinder, and the fixed ring seat is sealed to the fixed material box through an expansion joint, thereby achieving effective sealing between the rotating cylinder and the fixed material box, which has the advantages of simple structure and easy use, etc. On this basis, in the pressure regulating mechanism and the flexible support mechanism, Under the joint action of the structure and expansion joint, an elastic mechanism with pre-tightening, compensation and buffering functions is formed between the rotating cylinder and the fixed material box. The elastic mechanism can always maintain sufficient elasticity, so that the fixed ring has good tracking performance and can flexibly move in all directions, compensate for the sealing angle deflection and axial movement of the rotating ring caused by the centering error between the rotating ring and the fixed ring, keep the sealing surface of the rotating ring and the sealing surface of the fixed ring straight and parallel, so that the sealing pair between the rotating ring and the fixed ring has a good film pressure distribution, realizes parallel contact and good fit of the sealing surface, improves the dynamic stability and sealing performance of the sealing pair, prolongs the service life of the sealing pair, and reduces the service life of the sealing pair. cycle cost, more importantly, under the joint action of the pressure sensor, the pressure regulating mechanism and the controller, a sealing regulating mechanism is formed between the rotating cylinder and the fixed material box, and the sealing regulating mechanism can adjust the contact pressure ratio between the rotating ring and the fixed ring in real time, so that the rotating cylinder and the fixed material box are always kept in a sealed state. Specifically: during the operation of the rotating cylinder, the pressure sensor is used to monitor the contact pressure ratio values ​​at different positions between the rotating ring and the fixed ring in real time, and these contact pressure ratio values ​​are transmitted to the controller for data analysis, thereby determining the contact pressure ratio adjustment amount at different positions between the rotating ring and the fixed ring according to the actual situation, and then in the controller Under the control of , the contact pressure ratio adjustment amount at different positions is transmitted to the pressure regulating mechanism, and the pressure regulating mechanism is used to intelligently regulate the force applied to different positions of the fixed ring seat to ensure that the contact pressure ratio between the rotating ring and the fixed ring is always maintained within the set target range, and finally the rotating cylinder and the fixed material box are always kept in a sealed state. It can be seen that under the action of the sealing regulating mechanism, it can ensure that the sealing surface is always in contact to avoid failure due to the opening of the sealing surface, and can also reduce the adverse effects of sealing surface wear, thermal cracking, etc. caused by the large contact pressure ratio of the sealing surface, thereby improving the reliability of the sealing pair, extending the service life of the sealing pair, and reducing the power consumption and life cycle cost of the sealing pair.

[0051] In this embodiment, the pressure regulating mechanism includes at least two fluid pressure cylinders 11 and a pressure regulating valve 10 for regulating the fluid pressure in the fluid pressure cylinder 11. Each fluid pressure cylinder 11 is hinged on the circular end face of the fixed ring seat 6 through a piston rod 12. The fluid inlet of the fluid pressure cylinder 11 is connected to the outlet end of the pressure regulating valve 10. In this embodiment, the number of fluid pressure cylinders 11 is 4, which are evenly distributed on the circular end face of the fixed ring seat 6 close to the expansion joint 8 through the piston rod 12.

[0052] In this embodiment, the fluid pressure in each fluid pressure cylinder is controlled by a separately configured pressure regulating valve. In this embodiment, the pressure regulating valve controls the valve opening by means other than manpower such as electric, pneumatic, hydraulic or electromagnetic drive, thereby automatically adjusting the fluid pressure in the fluid pressure cylinder. At the same time, during use, the contact pressure ratio between the rotating ring and the fixed ring is measured in real time, and compared and adjusted according to the set target contact pressure ratio value. When the measured contact pressure ratio is lower than the target value, the control system will increase the valve opening, thereby increasing the pressure in the fluid pressure cylinder; conversely, when the measured contact pressure ratio is higher than the target value, the control system will reduce the valve opening, thereby reducing the pressure in the fluid pressure cylinder. It can be seen that in the present invention, by continuously adjusting the valve opening, the pressure regulating valve can make the measured contact pressure ratio gradually approach the target value, thereby achieving effective control of the contact pressure ratio between the rotating ring and the fixed ring.

[0053] In this embodiment, the fluid pressure cylinder 11 is a hydraulic cylinder. In another embodiment, the fluid pressure cylinder 11 is a gas cylinder.

[0054] In the specific application scenario of selecting the appropriate fluid pressure cylinder type, it is necessary to comprehensively consider the force requirements, precision requirements, speed, operating environment, controllability, flexibility, safety, reliability, space limitations and other factors. Among them, the hydraulic cylinder has a smooth transmission, large transmission force, and is easy to achieve overload protection, stepless speed regulation, and automatic control, but there are leakage problems, the oil temperature is high during operation (generally in the range of 30 to 80°C), and the manufacturing precision requirements are high. In addition, the cylinder has a simple structure, low cost, high reliability, good working stability, and good buffering performance, but the transmission force is small, the speed control is difficult, and the stroke length is limited.

[0055] In this embodiment, when in use, the pressure regulating valve 10 is used to adjust the fluid pressure of the fluid pressure cylinder 11, and then the force transmitted to the fixed ring seat by each fluid pressure cylinder is regulated, so that the contact pressure ratio between the slewing ring 3 and the fixed ring 4 is 20kPa~120kPa. A more preferred solution is to make the contact pressure ratio between the slewing ring 3 and the fixed ring 4 50kPa~90kPa.

[0056] In this embodiment, the flexible support mechanism includes at least one set of flexible support components 5. Specifically, in this embodiment, the number of flexible support components 5 is 2 sets. Each set of flexible support components 5 is arranged in a vertical plane of the axis of the fixed ring seat 6 and is used to flexibly support the fixed ring seat 6.

[0057] In this embodiment, the bottom of each set of flexible support components 5 is connected to the rigid component, and a sliding pair 7 is provided between the flexible support component 5 and the rigid component, wherein the rigid component is used to support the sliding pair 7. In this embodiment, the sliding pair 7 adopts a combination of a roller and a guide rail. In other embodiments, the sliding pair 7 adopts a combination of a guide rail and a slider, or a combination of a linear bearing and a guide rail.

[0058] In this embodiment, the flexible support component 5 is a spring support component. In other embodiments, the flexible support component 5 is a rubber support component, a pneumatic support component or a hydraulic support component.

[0059] When selecting flexible support components, it is necessary to comprehensively consider multiple factors such as working environment and conditions, performance requirements, economy and maintainability. Among them, spring support components are one of the most common flexible support components. Using springs as the main elastic elements, different stiffness can be designed as needed to provide appropriate support and buffering effects. Rubber support components use rubber materials as elastic elements and have good elasticity and damping properties. Therefore, this type of support component can effectively absorb and disperse impact forces. Pneumatic support components use gas (such as air) as an elastic medium, usually with lower stiffness and higher damping characteristics, and are suitable for occasions with high requirements for vibration and impact. Hydraulic support components use liquid (such as oil) as a transmission medium, and achieve support and buffering functions through the flow and pressure changes of the liquid. They usually have a large load-bearing capacity and adjustability, and are suitable for support requirements under heavy loads and complex working conditions.

[0060] In this embodiment, the rigid component is the ground. In another embodiment, the rigid component is a floor or a steel platform.

[0061] In this embodiment, under the action of the sliding pair 7, the bottom of the flexible support component 5 can slide along the axial direction to adapt to the axial movement of the fixed ring seat caused by the expansion joint 8, thereby avoiding the expansion joint 8 from causing the flexible support component 5 and the fixed ring seat 6 to bear additional stress.

[0062] In this embodiment, when selecting a suitable sliding pair for a specific application, it is necessary to comprehensively consider many factors such as motion requirements and accuracy, load and carrying capacity, material and wear resistance, friction and lubrication, installation and maintenance, economy and cost. Among them, the guide rail and slider combination mechanism can ensure that the parts slide smoothly along the predetermined path. By selecting suitable guide rail and slider materials and proper lubrication, an efficient and low-friction sliding connection can be achieved. The roller and guide rail combination mechanism allows the parts to roll on the guide rail to achieve relative sliding along the axial direction. This connection mechanism is suitable for applications that require axial movement and require low friction. The linear bearing and guide rail combination mechanism provides precise guiding and sliding functions for the parts. The linear bearing rolls on the guide rail through rolling elements (such as balls or rollers) to achieve low-friction, high-precision axial sliding.

[0063] In this embodiment, the expansion joint is detachably fixedly connected to the fixed material box.

[0064] In this embodiment, the expansion joint is a non-metallic expansion joint (compensator). In another embodiment, the expansion joint is a metal expansion joint.

[0065] In this embodiment, an expansion joint is used to flexibly connect the fixed material box and the fixed ring seat, so as to facilitate the fixed ring to adapt to the axial movement and radial runout of the slewing ring.

[0066] In this embodiment, metal expansion joints and non-metal expansion joints each have their own advantages and disadvantages. When selecting an expansion joint, it is necessary to comprehensively consider factors such as specific system requirements, medium characteristics, environmental conditions, and cost in order to select the most suitable type of expansion joint. Metal expansion joints have the advantages of good high temperature tolerance, high strength, and good corrosion resistance, but they are high in cost and have poor flexibility; non-metal expansion joints have the advantages of low cost, good flexibility, and strong corrosion resistance, but they have limited high temperature tolerance and low strength.

[0067] In the present embodiment, the rotating ring and the fixed ring are collectively referred to as a sealing ring, that is, the sealing ring includes a rotating ring and a fixed ring, wherein the sealing ring is an integral sealing ring or a split sealing ring. Specifically, in the present embodiment, the sealing ring is a split sealing ring, wherein the split sealing ring is composed of two semi-circular rings with the same inner diameter and outer diameter that can be detachably overlapped. When inspecting and maintaining the sealing ring, there is no need to dismantle or lift the fixed material box, which can greatly improve the inspection and maintenance efficiency and reduce the inspection and maintenance cost. At the same time, sealant is applied to the interface of the semi-circular rings with the same inner diameter and outer diameter, which can reduce the leakage of gas and dust at the interface between the two semi-circular rings.

[0068] In this embodiment, the fixed material box 9 is a feed box. In another embodiment, the fixed material box 9 is a discharge box.

[0069] In this embodiment, a circumferential limit stop is provided between the slewing ring 3 and the slewing ring seat 2. The slewing ring 3 and the slewing ring seat 2 are detachably connected by bolts 15. Specifically, a threaded hole is provided on the slewing ring 3, and a through hole is provided on the slewing ring seat 2. The bolts 15 are passed through the through holes and then screwed into the threaded holes, so that the slewing ring 3 and the slewing ring seat 2 are fastened.

[0070] In this embodiment, a circumferential limit stop is provided between the fixing ring 4 and the fixing ring seat 6. The fixing ring 4 and the fixing ring seat 6 are detachably connected by bolts 15. Specifically, a threaded hole is provided on the fixing ring 4, and a through hole is provided on the fixing ring seat 6. The bolts 15 are passed through the through holes and then screwed into the threaded holes, so that the fixing ring 4 and the fixing ring seat 6 are fastened.

[0071] In the present embodiment, the fixed ring seat 6 is provided with at least two oil filling holes 14 on the side close to the fixed material box 9. Specifically, in the present embodiment, the number of the oil filling holes 14 is 3. Each oil filling hole 14 penetrates the fixed ring seat 6 and the fixed ring 4 and extends to the sealing surface of the planar sealing pair. The other end of each oil filling hole 14 is connected to an oil filling pump.

[0072] In this embodiment, the output port of the oil injection hole 14 is a circumferential arc-shaped groove. In another embodiment, the output port of the oil injection hole 14 is a cylindrical hole.

[0073] In this embodiment, the outlets of the oil filling holes 14 are distributed on the circumference of concentric circles.

[0074] In this embodiment, lubricant is injected into the oil filling hole 14, wherein the lubricant is a liquid lubricant. In another embodiment, the lubricant is grease (semi-solid lubricant).

[0075] When selecting lubricants, it is necessary to comprehensively consider multiple factors such as working environment, temperature, load, service life, environmental protection and cost. Liquid lubricants are in liquid form at room temperature, including mineral oil, synthetic oil, etc., with good fluidity and permeability, and can form an oil film on the friction surface to play a role in lubrication, friction reduction, cooling and cleaning. Common liquid lubricants include lubricating oil, hydraulic oil, etc.; grease is semi-solid at room temperature and is composed of base oil, thickener and additives. It has high adhesion and viscosity, can fill the tiny bumps on the friction surface, and form a solid lubricating film to play a role in lubrication, sealing and rust prevention. Common greases include calcium-based greases, lithium-based greases, etc.

[0076] In this embodiment, the oil injection pump is one of a gear pump, a screw pump, a plunger pump, a cam pump, a peristaltic pump, and a vane pump. In this embodiment, the lubricant is a liquid lubricant. At this time, the oil injection pump adopts a gear pump, a screw pump, or a plunger pump. Specifically, a gear pump is used as the oil injection pump. In addition, when the lubricant is grease, the oil injection pump adopts a gear pump, a screw pump, a cam pump, a peristaltic pump, or a vane pump.

[0077] In this embodiment, a countersunk groove is provided in the fixing ring seat 6 . In another embodiment, a countersunk hole is provided in the fixing ring seat 6 , wherein the countersunk groove or the countersunk hole faces the fixing ring 4 .

[0078] In this embodiment, the pressure sensor 13 is installed in the sink to detect the contact pressure between the fixed ring and the fixed ring seat, and indirectly detect the contact pressure between the sealing surface of the fixed ring and the sealing surface of the slewing ring.

[0079] In this embodiment, the pressure sensor 13 is a strain gauge pressure sensor. In other embodiments, the pressure sensor 13 is a piezoelectric pressure sensor or a capacitive pressure sensor.

[0080] In the specific application of pressure sensors, it is necessary to comprehensively consider multiple factors such as measurement range, accuracy requirements, operating environment, output signal, power supply requirements, response time, reliability, cost, etc., and weigh and select according to the specific application scenario. Among them, strain pressure sensors indirectly measure pressure by measuring the strain of elastic elements, and have high precision, high stability and good dynamic response capabilities. Piezoelectric pressure sensors have the characteristics of high sensitivity, fast response and high-precision measurement. Capacitive pressure sensors use the principle of capacitance to measure pressure, and have high precision, high stability and good linearity.

[0081] In this embodiment, the controller used is a key component in industrial production. It integrates multiple technical categories such as automatic control technology, microelectronics technology, communication technology, and sensor technology. The integration of these technologies enables the intelligent controller to realize intelligent control of terminal equipment, improve production efficiency, and optimize product quality. The core functions of the controller include task description and knowledge representation, state monitoring of the controlled object, reasoning decision-making and control, etc. By imitating human behavior, it has functions such as real-time learning and reasoning, can process various information to enhance the reliability of the system, and plan the control method in a safe way to generate control output so that the performance indicators of the system are optimized. From the perspective of control strategy, controllers can be divided into the following types: 1) Logical control. This control strategy uses logical judgment, conditional branching, and looping to achieve control. For example, logical control circuits and logical control programs are specific applications of logical control strategies. Logical control can clearly perform simple and clear control operations such as on / off, start / stop according to preset conditions. 2) Fuzzy control. Fuzzy control strategy is based on fuzzy logic and can handle problems with fuzziness, uncertainty, and nonlinearity. Fuzzy logic controller is a typical representative of fuzzy control strategy. Fuzzy control does not rely on precise mathematical models, so it is particularly suitable for complex systems that are difficult to establish precise models. 3) Neural network control. This control strategy uses a neural network model to learn and train the neural network to enable it to have the ability to adapt, self-learn and self-optimize. The neural network controller is an example of a neural network control strategy. Neural network control can simulate the learning and decision-making process of the human brain and is suitable for handling complex and changeable control tasks. 4) Adaptive control. The adaptive control strategy automatically adjusts the control strategy and parameters according to the system state and environmental changes to adapt to uncertainty and variability. The adaptive controller is a key component for implementing adaptive control. Adaptive control can dynamically adjust the control strategy to adapt to changes in external conditions, thereby improving the stability and adaptability of the system.

[0082] In this embodiment, the controller and the pressure sensor 13 are connected by wire. In another embodiment, the controller and the pressure sensor 13 are connected by wireless.

[0083] In this embodiment, the controller is connected to the pressure regulating mechanism by wire. Specifically, in this embodiment, the pressure regulating valve 10 is connected to the controller by wire. In another embodiment, the controller is connected to the pressure regulating mechanism by wireless.

[0084] To ensure the effectiveness and reliability of the smart sealing system, the following key factors need to be considered when wirelessly connecting each pressure sensor and / or pressure regulating valve to the controller: 1) Wireless communication technology. There are a variety of wireless communication technologies to choose from, such as Wi-Fi, Bluetooth, Zigbee, LoRa, etc. The choice of which technology depends on the specific requirements of the application, such as communication range, data transmission rate, power consumption, etc. 2) Pressure sensor design. The pressure sensor needs to integrate a wireless communication module so that it can send data to the controller. These modules are usually low-power to ensure long-term stable operation of the sensor. 3) Controller. The smart controller needs to have the ability to receive and process data from multiple sensors. It usually contains a wireless communication interface for receiving data from sensors and a processing unit for analyzing this data and making corresponding control decisions. 4) Network topology. Depending on the application requirements, different network topologies can be designed, such as a star network (all sensors communicate directly with the controller) or a mesh network (sensors can also communicate with each other). 5) Synchronization and coordination. Since multiple sensors may send data at the same time, it is necessary to ensure synchronization and coordination of data transmission to avoid communication conflicts and data loss. 6) Security and reliability. Wireless communications may face security risks such as interference and eavesdropping, so appropriate encryption and security measures need to be taken to protect data. In addition, in order to ensure the reliability of the system, communication redundancy and fault recovery mechanisms also need to be considered.

[0085] To ensure the stability and reliability of the connection, the following key factors need to be considered when connecting each pressure sensor and / or pressure regulating valve to the controller by wire: 1) Wiring scheme. It is key to design a suitable wiring scheme to ensure that the cables do not interfere with each other or cause confusion. Consider using appropriate cable connection equipment, such as cable troughs or cable bundles, to keep the cables neat and orderly. 2) Cable length and type. Select the appropriate cable length to ensure that the sensor can be reliably connected to the smart controller. At the same time, choose the type of cable that suits the application requirements, such as shielded cables to reduce electromagnetic interference, or flexible cables to accommodate bending on the circumference. 3) Signal attenuation and interference. Long-distance transmission or complex environments may cause signal attenuation or electromagnetic interference. It is necessary to select cables with sufficient signal transmission capacity and take appropriate shielding measures to reduce interference. 4) Connection interface. The pressure sensor and controller should use matching interfaces to ensure correct and stable connection. These interfaces may be standard interfaces, such as USB, RS-232, RS-485, etc., or interfaces designed for specific applications. 5) Power supply. Wired connections usually require consideration of power supply issues. Ensure that each sensor has access to a stable power supply, and consider using appropriate power distribution and protection measures to avoid problems such as voltage fluctuations or short circuits. 6) Scalability and maintainability. Considering the possible increase in the number of sensors or maintenance operations that may be required in the future, the wiring scheme should have a certain degree of scalability and maintainability. Design a structure that is easy to replace or add sensors, and ensure that the access and replacement of cables are convenient. 7) Cost considerations. Wired connections are generally less expensive than wireless connections, but the cost of cables and connectors, as well as installation and maintenance costs, still need to be considered.

[0086] An intelligent sealing method of the intelligent sealing system of the above embodiment comprises the following steps:

[0087] S1. During the operation of the rotating cylinder 1, the contact specific pressure at different positions between the rotating ring 3 and the fixed ring 4 is monitored in real time by using the pressure sensor 13.

[0088] S2. The contact pressure ratio values ​​at different positions between the rotating ring 3 and the fixed ring 4 obtained in step S1 are transmitted to the controller for data analysis. Specifically, according to the contact pressure ratio values ​​at different positions and the deviation from the preset contact pressure ratio target range (20kPa~120kPa), the algorithm in the controller (such as PID control algorithm or other advanced control strategies) is used to calculate the contact pressure ratio adjustment amount at different positions between the rotating ring 3 and the fixed ring 4, that is, to determine the adjustment amount of the fluid pressure in each fluid pressure cylinder.

[0089] S3, the contact pressure ratio adjustment amount at different positions between the rotating ring 3 and the fixed ring 4 obtained in step S1 is transmitted to the pressure regulating mechanism. Specifically, the controller is used to send the instruction of the contact pressure ratio adjustment amount to the pressure regulating valve of the pressure regulating mechanism, and the fluid pressure in the fluid pressure cylinder is accurately adjusted by the pressure regulating valve. By changing the fluid pressure in the fluid pressure cylinder, the force applied to the fixed ring seat is timely adjusted, so as to adjust the contact pressure ratio at different positions between the rotating ring 3 and the fixed ring 4 in real time, so that the contact pressure ratio between the rotating ring 3 and the fixed ring 4 is within the preset contact pressure ratio target range. In this step, when the pressure regulating valve is used to adjust the contact pressure ratio at different positions between the rotating ring 3 and the fixed ring 4 in real time, the difference of the contact pressure ratio at different positions is controlled to be ≤6kPa.

[0090] S4, repeat steps S1 to S3, continuously monitor the actual contact pressure ratio, and make dynamic adjustments as needed to ensure that the contact pressure ratio between the rotating ring 3 and the fixed ring 4 is always within the target range, so that the rotating cylinder 1 and the fixed material box 9 are always kept in a sealed state.

[0091] In this embodiment, through the above process, the controller can effectively control the contact pressure ratio between the rotating ring and the fixed ring, which not only ensures the stability and reliability of the sealing system, but also extends the service life of the sealing system and reduces the life cycle cost of the sealing system.

[0092] It can be seen from the above results that compared with conventional sealing devices, the intelligent sealing system of the present invention, under the synergistic effect of the elastic mechanism and the sealing control mechanism, can timely adjust the contact pressure ratio of the sealing surface as the jumping, swinging, axial movement and other changes of the rotating cylinder during operation, so that the intelligent sealing system can always maintain excellent sealing performance while effectively improving the stability and reliability of the intelligent sealing system. It not only has high adaptability to cylinder shape errors, installation coaxiality deviations, and radial jumping and axial movement of the cylinder during operation, but also has the advantages of good sealing effect, low wear, high reliability, long service life, easy maintenance and replacement, etc. As a new sealing system with excellent sealing performance, good stability and reliability, and long service life, it can timely and effectively control the sealing effect between the rotating cylinder and the fixed material box, and avoid secondary pollutant defects during use, which is of great significance for promoting the widespread use of rotary kilns.

[0093] The above embodiments are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An intelligent sealing system for a rotary drum and a fixed material box, characterized in that: The invention comprises a sealing ring arranged between a rotating cylinder (1) and a fixed material box (9), wherein the sealing ring comprises a rotating ring (3) and a fixed ring (4) which are in contact with each other, wherein the rotating ring (3) rotates relative to the fixed ring (4) and a planar sealing pair is formed between the rotating ring (3) and the fixed ring (4); the rotating ring (3) is detachably connected to a rotating ring seat (2) on a side close to the rotating cylinder (1), and the rotating ring seat (2) is fixed and sealed to the rotating cylinder (1); the fixed ring (4) is detachably connected to a fixed ring seat (6) on a side close to the fixed material box (9), and an expansion joint (8) is provided between the fixed ring seat (6) and the fixed material box (9); the fixed ring seat (6) is sealed to the fixed material box (9) via the expansion joint (8); the fixed ring seat (6) is detachably connected to the fixed material box (9) on a side close to the fixed material box (9 ... A pressure regulating mechanism for regulating the contact pressure ratio between the slewing ring (3) and the fixed ring is connected to one side of the fixed material box (9); a flexible support mechanism is connected to the bottom of the fixed ring seat (6); a pressure sensor (13) for monitoring the contact pressure ratio between the slewing ring (3) and the fixed ring (4) is provided between the fixed ring (4) and the fixed ring seat (6); a controller is connected to the pressure sensor (13); the controller is connected to the pressure regulating mechanism; the flexible support mechanism includes at least one set of flexible support components (5); each set of the flexible support components (5) is arranged in a vertical plane of the axis of the fixed ring seat (6); the bottom of each set of the flexible support components (5) is connected to a rigid component; and a sliding pair (7) is also provided between the flexible support components (5) and the rigid component.

2. The intelligent sealing system according to claim 1, characterized in that: The pressure regulating mechanism comprises at least two fluid pressure cylinders (11) and a pressure regulating valve (10) for regulating the fluid pressure in the fluid pressure cylinder (11); the piston rod (12) of each fluid pressure cylinder (11) is connected to the annular end surface of the fixed ring seat (6); the fluid inlet of the fluid pressure cylinder (11) is connected to the outlet end of the pressure regulating valve (10); the pressure regulating valve (10) is connected to the controller; when in use, the pressure regulating valve (10) is used to regulate the fluid pressure of the fluid pressure cylinder (11) so that the contact pressure ratio between the slewing ring (3) and the fixed ring (4) is 20 kPa to 120 kPa.

3. The intelligent sealing system according to claim 2, characterized in that: When in use, the pressure regulating valve (10) is used to adjust the fluid pressure of the fluid pressure cylinder (11) so that the contact specific pressure between the slewing ring (3) and the fixed ring (4) is 50 kPa to 90 kPa.

4. The intelligent sealing system according to claim 1, characterized in that: The flexible support component (5) is one of a spring support component, a rubber support component, a pneumatic support component, and a hydraulic support component; the sliding pair (7) is a combination of a guide rail and a slider, or a combination of a roller and a guide rail, or a combination of a linear bearing and a guide rail.

5. The intelligent sealing system according to any one of claims 1 to 4, characterized in that: The sealing ring is an integral sealing ring or a split sealing ring; the split sealing ring is composed of at least two circular ring segments with the same inner diameter and outer diameter which are detachably overlapped or thinly welded.

6. The intelligent sealing system according to any one of claims 1 to 4, characterized in that: The fixed ring seat (6) is provided with at least two oil injection holes (14) on a side close to the fixed material box (9); each of the oil injection holes (14) penetrates the fixed ring seat (6) and the fixed ring (4) and extends to the sealing surface of the planar sealing pair; the other end of each of the oil injection holes (14) is connected to an oil injection pump; the output port of the oil injection hole (14) is a circumferential arc groove or a cylindrical hole; the output ports of the oil injection holes (14) are distributed on the circumference of concentric circles.

7. The intelligent sealing system according to claim 6, characterized in that: A groove or a countersunk hole is provided in the fixing ring seat (6); the groove or the countersunk hole faces the fixing ring (4); the pressure sensor (13) is installed in the groove or the countersunk hole; the pressure sensor (13) is one of a strain gauge pressure sensor, a piezoelectric pressure sensor, and a capacitive pressure sensor; the controller and the pressure sensor (13) are connected by wire or wirelessly; the controller and the pressure regulating mechanism are connected by wire or wirelessly.

8. An intelligent sealing method for an intelligent sealing system according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. During the operation of the intelligent sealing system, using the pressure sensor (13) to monitor in real time the contact pressure ratio at different positions between the rotating ring (3) and the fixed ring (4); S2, transmitting the contact pressure ratio values ​​at different positions between the rotating ring (3) and the fixed ring (4) obtained in step S1 to the controller for data analysis, and determining the contact pressure ratio adjustment amounts at different positions between the rotating ring (3) and the fixed ring according to a preset contact pressure ratio target range; S3, transmitting the contact pressure ratio adjustment amount at different positions between the rotating ring (3) and the fixed ring (4) obtained in step S1 to the pressure regulating mechanism, and using the pressure regulating mechanism to adjust the contact pressure ratio at different positions between the rotating ring (3) and the fixed ring (4) in real time, so that the contact pressure ratio between the rotating ring (3) and the fixed ring (4) is within a preset contact pressure ratio target range; S4, repeating steps S1 to S3, so that the rotary cylinder (1) and the fixed material box (9) are always kept in a sealed state.

9. The intelligent sealing method according to claim 8, characterized in that: In step S3, when the contact pressure ratio at different positions between the rotating ring (3) and the fixed ring (4) is adjusted in real time using the pressure adjustment mechanism, the difference in the contact pressure ratio at different positions is controlled to be ≤6 kPa.

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