A method for on-line detection of blade clearance for a vertical mixer

Abstract

The present application particularly relates to a paddle gap online detection method for a vertical mixer, which uses a laser non-contact detection method, does not need to stop and empty materials, can detect the gap in real time during the running of the equipment, truly reflects the dynamic gap change, and is suitable for flammable, explosive and high-risk working conditions without friction and static electricity generation. Through the combination of the paddle-paddle end line marks, and in cooperation with the image recognition technology, the paddle position state recognition under the material covering and shielding condition is realized, and the technical problem that the gap of the vertical mixer cannot be detected due to material covering is completely solved. The present application not only solves the problem that the gap of the vertical mixer under the load state cannot be detected, but also realizes the minimum gap position judgment under the load state in cooperation with the image recognition technology, and provides data support for the propellant mixing safety.

Description

Technical Field

[0001] This invention relates to the field of mixer technology, and more specifically to an online method for detecting blade clearance in a vertical mixer. Background Technology

[0002] In related technologies, the solid propellant vertical mixer is the core equipment for solid propellant preparation. The control of the gaps between the impeller and the pot wall, the impeller and the pot bottom, and the impeller and impeller gaps determines the mixing uniformity, equipment safety, and long-term operational stability. In actual production and operation, the gaps are affected by multiple factors such as stirring force, material extrusion and impact force, thermal environment, and long-term wear, and are constantly changing dynamically: if the gap is too small, mechanical scraping and extrusion friction will occur between metals. For flammable, explosive, and shear-sensitive high-risk energetic materials, it is very easy to cause safety accidents such as combustion and explosion due to frictional heat generation and static electricity accumulation. At the same time, it will aggravate component wear and shorten the service life of the equipment. If the gap is too large, dead zones will appear in the mixing chamber, resulting in uneven mixing and residue accumulation, making it impossible to achieve the preset mixing uniformity, which directly affects the performance of solid propellant engines.

[0003] Currently, the blade clearance detection of vertical mixers adopts a manual contact static measurement method, using tools such as feeler gauges and vernier calipers. This method can only be used when the equipment is stopped and the material is emptied. It cannot obtain dynamic clearance data in real time during the operation of the equipment with material, and the measurement results cannot reflect the clearance changes under actual load conditions, making it difficult to meet the actual engineering needs.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] This invention provides an online method for detecting blade clearance in a vertical mixer, which can effectively overcome the defects existing in the prior art.

[0006] Other features and advantages of the invention will become apparent from the following detailed description, or may be learned in part by practice of the invention.

[0007] According to a first aspect of the present invention, an online method for detecting blade clearance in a vertical mixer is provided, the method comprising: The clearance parameters of the vertical mixer under no-load conditions were collected; among which, the clearance parameters under no-load conditions included: blade-to-blade initial clearance. Initial gap between impeller and boiler wall Initial gap between paddle blade and pot bottom ; Under load, the vertical mixer uses a laser displacement sensor detection assembly to collect distance data between the laser sensor and the surface of the hollow / solid impeller shaft; the triggering time is determined based on the peak signal in the distance data to trigger the online compensation gap calculation for that triggering time; Based on the output torque at the trigger moment Determine the hollow blade shaft torque and solid blade shaft torque at the trigger moment; Combining the length L of the blade extending out of the rotating body and the radius of the mixing pot Material density The material mixing quantity W determines the equivalent load application length corresponding to the triggering time. ; Images of hollow and solid blades are captured using a camera module to determine the blade markings corresponding to the trigger moment. Based on the pre-configured correspondence between blade markings and blade positions, the distance from the blade marking to the blade bottom surface at the minimum blade-to-blade clearance position is determined. The blade markings correspond to the distance from the blade bottom surface to the minimum clearance position between the blade and the pot wall. ; Based on the blade bending stiffness EI, blade stiffness coefficient, blade extension length L over the rotating body, and equivalent load application length. By combining the blade shaft torque at the triggering moment and the length of the minimum clearance position from the blade bottom surface, the blade deformation corresponding to hollow and solid blades is determined; and based on the blade deformation corresponding to hollow and solid blades, the blade-blade compensation clearance at the triggering moment is determined. ; By utilizing the compensation gap and the distance between the laser sensor and the blade shaft surface, the dynamic blade-blade clearance at the trigger moment is determined. .

[0008] In some exemplary embodiments, based on the output torque at the trigger time Determine the hollow blade shaft torque and solid blade shaft torque at the current triggering moment; including:

[0009]

[0010] in, Indicates the first The output torque of the vertical mixer at each trigger moment; Indicates the first The torque of the solid blade shaft at each trigger moment; Indicates the first The torque of the hollow blade shaft at each trigger moment.

[0011] In some exemplary embodiments, the length L of the blade extending out of the rotating body and the radius of the mixing pot are combined. Material density The amount of material mixed, W, determines the length of the equivalent load applied. ,include:

[0012] Where L represents the length of the blade extending beyond the rotating body; Indicates the radius of the mixing pot; W represents the density of the material; W represents the amount of material mixed.

[0013] In some exemplary embodiments, the blade bending stiffness EI, blade stiffness coefficient, blade extension length L over the rotating body, and equivalent load application length are used as the basis. Based on the blade shaft torque at the trigger moment and the distance from the minimum clearance position to the blade bottom surface, the blade deformation corresponding to hollow and solid blades is determined, including:

[0014] in, Indicates the first Blade deformation under load conditions of hollow blade at each trigger moment; Indicates the first The torque of the hollow blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the hollow blade at each trigger moment; EI represents the blade bending stiffness; L represents the length of the blade extending out of the rotating body; Indicates the length of the equivalent load applied; This indicates the distance from the blade bottom surface to the position of the minimum blade-blade clearance;

[0015] in, Indicates the first Blade deformation under load conditions of solid blades at each trigger moment; Indicates the first The torque of the solid blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the solid blade at each trigger moment.

[0016] In some exemplary embodiments, the blade-blade compensation gap corresponding to the triggering moment is determined based on the blade deformation corresponding to hollow and solid blades. ,include:

[0017] in, Indicates the first Blade deformation under load conditions of solid blades at each trigger moment; Indicates the first Blade deformation under load conditions of hollow blades at each trigger moment.

[0018] In some exemplary embodiments, the blade-blade dynamic clearance corresponding to the triggering moment is determined by utilizing the compensation gap, the distance between the laser sensor and the blade shaft surface. ,include:

[0019] in, This indicates the actual minimum clearance between the blades; Indicates the first The blade-blade compensation gap corresponding to each trigger moment; Lw1 represents the minimum distance between the first laser sensor La1 and the hollow blade shaft surface under no-load conditions; Lw2 represents the minimum distance between the second laser sensor La2 and the solid blade shaft surface under no-load conditions. Indicates the first laser sensor La1 The closest distance to the surface of the hollow blade shaft collected in the second sampling; Indicates the second laser sensor La2 The closest distance to the surface of the solid blade shaft collected in this second sampling.

[0020] In some exemplary embodiments, the method further includes: Based on the blade bending stiffness EI and the stiffness coefficient of hollow blades The length L of the blade extending beyond the rotating body, combined with the length of the equivalent load applied at the trigger moment. Hollow blade shaft torque The minimum clearance position is the distance from the bottom surface of the impeller, which determines the impeller-mixing pot wall compensation clearance, including:

[0021] in, Indicates the first The blade-mixing pot wall compensation gap at each trigger moment; Indicates the first The torque of the hollow blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the hollow blade at each trigger moment; EI represents the blade bending stiffness; L represents the length of the blade extending out of the rotating body; This indicates the distance from the blade bottom surface to the position of the minimum clearance between the blade and the pot wall corresponding to the blade marking. Indicates the length of the equivalent load applied; Based on the impeller-mixing vessel wall compensation gap and the distance between the inner wall of the mixing vessel and the laser sensor, the dynamic gap between the impeller and the vessel wall is determined, including:

[0022]

[0023] in, Lw1 represents the actual minimum clearance between the blade and the pot wall; Lw2 represents the minimum distance between the first laser sensor La1 and the hollow blade shaft surface under no-load conditions; Lw3 represents the minimum distance between the second laser sensor La2 and the solid blade shaft surface under no-load conditions. Indicates the radius of the hollow blade; The distance between the inner wall of the mixing pot and the first laser sensor La1; The distance between the inner wall of the mixing pot and the second laser sensor La2.

[0024] In some exemplary embodiments, the method further includes: applying the equivalent load length corresponding to the triggering time based on the blade radius, blade bending stiffness EI, and blade stiffness coefficient. The blade shaft torque is used to determine the blade-boiler bottom compensation clearance under load conditions for hollow and solid shaft blades, including:

[0025]

[0026] in, Indicates the first The blade-boiler bottom compensation gap under the load condition of hollow shaft blade at each trigger moment; Indicates the first The blade-boiler bottom compensation gap under solid shaft blade load conditions at each trigger moment; Indicates the radius of the hollow blade; Indicates the radius of a solid blade; Indicates the first The torque of the hollow blade shaft at each trigger moment; Indicates the first The torque of the solid blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the hollow blade at each trigger moment; Indicates the first The stiffness coefficient of the solid blade at each trigger moment; EI represents the blade's bending stiffness; Indicates the length of the equivalent load applied; The blade-boiler bottom compensation clearance is determined based on the blade-boiler bottom compensation clearance under load conditions for hollow shaft blades and solid shaft blades.

[0027] in, Indicates the blade-boiler bottom compensation gap; Based on the blade-bowl bottom compensation gap, determine the dynamic blade-bowl bottom gap corresponding to the triggering moment. ,include:

[0028] in, This indicates the actual minimum clearance between the paddle and the bottom of the mixing pot.

[0029] In some exemplary embodiments, the method further includes: Determine the operating status of the blades based on the dynamic blade-blade clearance. Dynamic gap between impeller and boiler wall Dynamic gap between paddle and pot bottom At least one of the following is compared with the corresponding initial gap to determine the amount of gap change; The corresponding hierarchical safety interlocking control strategy is determined based on the amount of gap change.

[0030] In some exemplary embodiments, the method further includes: The vertical mixer is initialized, and the clearance parameters are calibrated and set. The clearance parameters calibrated and set include: the actual minimum clearance between the blades. The actual minimum clearance between the paddle and the pot wall The actual minimum gap between the paddle and the bottom of the mixing pot. ; The position of the laser sensor is configured, and the detection range of the laser displacement sensor detection assembly is configured according to the distance between the laser and the surface of the blade shaft; wherein, the laser displacement sensor detection assembly includes a first laser sensor La1 and a second laser sensor La2, which are symmetrically arranged on the middle cover of the vertical mixer; The detection range of the laser displacement sensor assembly is configured based on the distance between the laser and the blade shaft surface, including: Lw1-d0≤Lw i ≤Lw2+d0 Where d0 represents the blade-to-blade clearance; Lw1 represents the minimum distance between the first laser sensor La1 and the hollow blade shaft surface under no-load conditions; and Lw2 represents the minimum distance between the second laser sensor La2 and the solid blade shaft surface under no-load conditions.

[0031] According to a second aspect of the present invention, a computer program product is provided, on which a computer program is stored, which, when executed by a processor, implements the above-described method for online detection of blade clearance for a vertical mixer.

[0032] According to a third aspect of the present invention, an electronic device is provided, comprising: Processor; and Memory for storing the executable instructions of the processor; The processor is configured to implement the above-described online blade clearance detection method for a vertical mixer by executing the executable instructions.

[0033] According to a fourth aspect of the present invention, a storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the above-described method for online detection of blade clearance for a vertical mixer.

[0034] The online blade clearance detection method for vertical mixers provided by embodiments of the present invention enables the use of a laser displacement sensor to detect the distance between the sensor assembly and the blade shaft during vertical mixer operation under load, triggering real-time online calculation of the compensation clearance. By setting mixer mixing quantity and mixer type parameters, and combining online torque data of the vertical mixer under load, blade position information at the peak trigger time, and the torque data at the peak trigger time, the compensation clearance is calculated, thereby accurately obtaining the actual clearance under load. This method solves the problem of unmeasurable clearance under load in vertical mixers, realizes the determination of the minimum clearance position under load, and provides data support for propellant mixing safety.

[0035] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0037] Figure 1 The illustration schematically shows an exemplary embodiment of the present invention, a method for online detection of blade clearance in a vertical mixer; Figure 2 This schematic diagram illustrates an online detection method using a laser sensor, as an exemplary embodiment of the present invention. Figure 3 This diagram schematically illustrates the installation positions of a laser displacement sensor and an explosion-proof high-speed camera, as per an exemplary embodiment of the present invention. Figure 4 This schematic diagram illustrates a hollow / solid blade end marking line diagram according to an exemplary embodiment of the present invention. Figure 5 This schematic diagram illustrates the working principle of an online blade clearance detection device according to an exemplary embodiment of the present invention. Figure 6 The diagram illustrates the composition of an electronic device according to an exemplary embodiment of the present invention. Detailed Implementation

[0038] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the invention will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0039] Furthermore, the accompanying drawings are merely illustrative of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0040] To address the shortcomings and deficiencies of existing technologies, this example embodiment provides an online blade gap detection method for vertical mixers, aiming to solve the following technical challenges: 1. Overcoming the deficiencies of traditional contact-based detection methods, such as the inability to perform online dynamic measurement and the existence of safety hazards, achieving real-time gap detection under non-contact, non-stop, and material-carrying operation conditions; 2. Solving the problem of material obstruction during gap detection under load conditions in vertical mixers, achieving full-coverage, blind-angle-free detection of dynamic gaps at multiple locations such as blade-pot wall, blade-pot bottom, and blade-blade; 3. Eliminating interference from operating conditions such as vibration, load, and temperature deformation during the mixing process, establishing a multi-dimensional error compensation mechanism, and improving dynamic detection accuracy and long-term operational stability; 4. Achieving real-time analysis and graded safety interlock control of gap detection data, improving the inherent safety level of equipment operation; 5. Adapting to special operating conditions of mixing high-viscosity, flammable, and explosive solid propellants.

[0041] refer to Figure 1 As shown, the method includes: Step S11: Collect the clearance parameters of the vertical mixer under no-load conditions; wherein, the clearance parameters under no-load conditions include: blade-to-blade initial clearance. Initial gap between paddle and pot wall Initial gap between paddle blade and pot bottom ; Step S12: Under load, the vertical mixer uses the laser displacement sensor detection assembly to collect distance data between the laser sensor and the surface of the hollow / solid blade shaft; the triggering time is determined based on the peak signal in the distance data to trigger the online compensation gap calculation for that triggering time. Step S13, based on the output torque at the trigger moment Determine the hollow blade shaft torque and solid blade shaft torque at the trigger moment; Step S14, combining the length L of the blade extending out of the rotating body and the radius of the mixing pot. Material density The material mixing quantity W determines the equivalent load application length corresponding to the triggering time. ; Step S15: Use the camera component to acquire images of the hollow and solid blade shafts to determine the blade markings corresponding to the trigger moment; based on the pre-configured correspondence between blade markings and blade positions, determine the distance from the blade bottom surface to the blade marking corresponding to the blade-blade minimum clearance position. The blade markings correspond to the distance from the blade bottom surface to the minimum clearance position between the blade and the pot wall. ; Step S16, based on the blade bending stiffness EI, blade stiffness coefficient, blade extension length L of the rotating body, and equivalent load application length... By combining the blade shaft torque at the triggering moment and the length of the minimum clearance position from the blade bottom surface, the blade deformation corresponding to hollow and solid blades is determined; and based on the blade deformation corresponding to hollow and solid blades, the blade-blade compensation clearance at the triggering moment is determined. ; Step S17: Using the compensation gap and the distance between the laser sensor and the blade shaft surface, determine the blade-blade dynamic clearance corresponding to the triggering moment. .

[0042] The following will describe in more detail the online blade clearance detection method for a vertical mixer in this exemplary embodiment, with reference to the accompanying drawings and embodiments.

[0043] For example, the above method also includes: Step S101: Initialize the vertical mixer and calibrate and standardize the clearance parameters; wherein, the clearance parameters calibrated and standardized include: the actual minimum clearance between the blades. The actual minimum clearance between the paddle and the pot wall The actual minimum gap between the paddle and the bottom of the mixing pot. ; Step S102: Configure the position of the laser sensor and configure the detection range of the laser displacement sensor detection assembly according to the distance between the laser and the surface of the blade shaft; wherein, the laser displacement sensor detection assembly includes a first laser sensor La1 and a second laser sensor La2, which are symmetrically arranged on the intermediate cover of the vertical mixer.

[0044] Specifically, refer to Figure 2 As shown, a hollow impeller shaft 7 and a solid impeller shaft 9 are provided on the rotating body 5 of the mixing pot 1; inside the mixing pot 1, hollow impellers 6 are provided on the hollow impeller shaft 7, and solid impellers 8 are provided on the solid impeller shaft 9. Two laser sensors 3 can be symmetrically arranged on both sides of the middle position of the intermediate cover 2 on the housing 4 of the mixing pot 1; the laser sensors 3 are used to detect the distance between themselves and the solid impeller shaft 9 and the hollow impeller shaft 7 in real time. (Reference) Figure 3 As shown, camera components can also be symmetrically arranged on the intermediate cover 2; wherein, the camera components include two symmetrically arranged high-speed cameras 10, used to acquire images of the hollow propeller blade 6 and the solid propeller blade 8. (Reference) Figure 4 As shown, the hollow and solid blades have pre-marked lines at their ports. These markings determine the blade's current operating state, i.e., whether it's in a kneading or non-kneading state. After the laser displacement sensor assembly and camera module are assembled on the mixing pot, electrical wiring and debugging can be completed, initialization and calibration operations can be performed, and the laser displacement sensor assembly can complete a self-test. Zero-point calibration and distance calibration of the laser optical path are performed using a standard calibration block to determine the reference detection data and eliminate initial installation errors. Subsequently, the mixer is run under no-load to perform image recognition calibration, gap compensation zeroing, historical data clearing, and safety interlock initialization. The distance and image data collected by the laser sensor and camera module can be sent to the host computer for real-time processing.

[0045] Specifically, the first laser sensor can be labeled La1, and the second laser sensor La2. After assembly, the clearance of the device can be calibrated and measured to determine the actual clearance. The calibrated clearance includes the actual minimum clearance between the blades. The actual minimum clearance between the impeller and the pot wall. The actual minimum clearance between the paddle and the bottom of the pot. .

[0046] Furthermore, the detection range of the laser displacement sensor assembly can be configured based on the distance between the laser and the blade shaft surface, including: Lw1-d0≤ ≤Lw2+d0 Where d0 represents the blade-to-blade clearance; Lw1 represents the minimum distance between the first laser sensor La1 and the hollow blade shaft surface under no-load conditions; and Lw2 represents the minimum distance between the second laser sensor La2 and the solid blade shaft surface under no-load conditions. In the initial state, = .

[0047] Specifically, the rotation of the rotating body drives the hollow blade shaft and the solid blade shaft to rotate. When the surfaces of the hollow blade shaft and the solid blade shaft are directly facing the laser sensor La1 and the laser sensor La2, respectively, the two laser sensors will each collect one data peak. and The numbers 1 and 2 represent the laser sensor designation. This represents the number of times the sensor collected the peak value.

[0048] For example, for each revolution of the rotating body, laser sensor La1 and / or laser sensor La2 collect two data peaks, representing the hollow blade shaft / solid blade shaft and the closest distance L from the solid blade shaft / hollow blade shaft to the sensor, respectively. 11 L 12 and L 21 L 22 In the unloaded state, the closest distance between the laser sensor La1 and the surface of the hollow blade shaft is Lw1; in the unloaded state, the closest distance between the laser sensor La2 and the surface of the solid blade shaft is Lw2.

[0049] Specifically, a gap compensation unit can be provided, defining the gap compensation value for each measurement, including: Indicates the first The blade-blade compensation gap corresponding to each trigger moment; Indicates the first Blade-mixing pot wall compensation gap at each trigger moment; Indicates the first The blade-pot bottom compensation gap at each trigger moment.

[0050] Specifically, the laser sensor La1 initially collected the closest distance L to the surface of the hollow propeller shaft. 11 The first time the laser sensor La2 collected data was the closest distance L to the surface of the solid blade shaft. 21 Then the dynamic clearance between the blades Satisfy the following calculation formula: (1) in, This indicates the actual minimum clearance between the blades; Indicates the first The blade-blade compensation gap corresponding to each trigger moment; Lw1 represents the minimum distance between the first laser sensor La1 and the hollow blade shaft surface under no-load conditions; Lw2 represents the minimum distance between the second laser sensor La2 and the solid blade shaft surface under no-load conditions. Indicates the first laser sensor La1 The closest distance to the surface of the hollow blade shaft collected in the second sampling; Indicates the second laser sensor La2 The closest distance to the surface of the solid blade shaft collected in this second sampling.

[0051] The dynamic clearance between the impeller and the boiler wall satisfies the following calculation formula: (2) in, This indicates the actual minimum clearance between the paddle and the pot wall; Indicates the radius of the hollow blade; The distance between the inner wall of the mixing pot and the first laser sensor La1; The distance between the inner wall of the mixing pot and the second laser sensor La2.

[0052] dynamic gap between paddle and pot bottom It satisfies the following calculation formula: (3) in, This represents the minimum initial clearance between the blades; This indicates the actual minimum clearance between the paddle and the bottom of the mixing pot.

[0053] Specifically, after assembly, under no-load conditions, the following configurations can be made:

[0054] in, Indicates the first The blade-blade compensation gap corresponding to each trigger moment; Indicates the first The blade-mixing pot wall compensation gap at each trigger moment; Indicates the first The blade-pot bottom compensation gap at each trigger moment.

[0055] In step S11, the gap parameters of the vertical mixer under no-load conditions are collected. Specifically, after the mixer is assembled, it runs under no-load conditions for a period of time. The laser sensor collects n data points, and selects the minimum gap value from these data points as the initial gap, thus initializing the gap value. The formula is expressed as: d间0 =min(d 间1 d 间2 ,,d 间3 , ...d 间n ) d 壁0 =min(d 壁1 d 壁2 ,,d 壁3 , ...d 壁n (4) d 底0 = d 底初 in, Indicates the initial clearance between the blades; This indicates the initial clearance between the blade and the pot wall; This represents the initial clearance between the blade and the bottom of the pot. That is, this initial clearance value is the minimum initial clearance after initialization.

[0056] In step S12, under load, the vertical mixer uses the laser displacement sensor detection assembly to collect distance data between the laser sensor and the surface of the hollow / solid blade shaft; the triggering time is determined based on the peak signal in the distance data to trigger the online compensation gap calculation for that triggering time.

[0057] Specifically, under load, the mixer begins high-frequency recording of distance data after the laser sensor detection assembly detects the distance data. When a peak signal appears in the distance data, the laser sensor detection assembly sends the trigger moment of the peak signal to a gap compensation unit, triggering online gap compensation calculation for that trigger moment. The peak signal includes the minimum distance data collected when the hollow / solid blade shaft surface is directly facing the laser sensor. That is, during one rotation of the rotating body, the two laser sensors can respectively collect multiple distances to the hollow and solid blade shafts, and use the moment corresponding to the minimum distance as the trigger moment to calculate the corresponding gap compensation value.

[0058] In step S13, based on the output torque at the trigger moment Determine the hollow blade shaft torque and solid blade shaft torque at the current triggering moment.

[0059] For example, the specific calculation method for step S13 above includes: (5) (6) in, Indicates the first The output torque of the vertical mixer at each trigger moment; Indicates the first The torque of the solid blade shaft at each trigger moment; Indicates the first The torque of the hollow blade shaft at each trigger moment.

[0060] Specifically, the output torque can be the output torque of the rotating body. The output torque of the rotating body can be collected in real time using sensors, and the torque of the hollow blade shaft and the torque of the solid blade shaft can be obtained in real time based on the torque relationship between the rotating body and the hollow blade shaft and the solid blade shaft.

[0061] In step S14, the length L of the blade extending out of the rotating body and the radius of the mixing pot are combined. Material density The material mixing quantity W determines the equivalent load application length corresponding to the triggering time. .

[0062] For example, the specific calculation method for step S14 above includes: (7) Where L represents the length of the blade extending beyond the rotating body; Indicates the radius of the mixing pot; W represents the density of the material; W represents the amount of material mixed.

[0063] Specifically, the equivalent load application length can be determined in real time based on the performance parameters of the mixer, combined with the density and mixing amount of the material under the current load condition. This calculation step can be completed before or simultaneously with the torque calculation step. Changes in material density or mixture composition can also trigger a real-time recalculation of the equivalent load application length.

[0064] Alternatively, when the performance parameters of the mixer and the parameters of the material are predetermined, the equivalent load application length can be predetermined based on the performance parameters, material density, and material mixing amount before the mixer is run.

[0065] In step S15, the camera component is used to acquire images of the hollow and solid blades to determine the blade markings corresponding to the triggering time; based on the pre-configured correspondence between blade markings and blade positions, the distance from the blade marking to the blade bottom surface at the minimum blade-blade clearance position is determined. The blade markings correspond to the distance from the blade bottom surface to the minimum clearance position between the blade and the pot wall. .

[0066] Specifically, under load, the mixer can use a high-speed camera to capture real-time images of the blade end faces and identify the markings on the two blades. (Reference) Figure 4As shown, based on the correspondence between the blade markings and the blade positions, the distance from the blade bottom surface to the minimum blade-to-blade clearance position at the trigger moment can be determined. The distance from the blade to the bottom surface of the pot wall to the minimum clearance position. The formula is expressed as: (8) In step S16, based on the blade bending stiffness EI, blade stiffness coefficient, blade extension length L of the rotating body, and equivalent load application length... By combining the blade shaft torque at the triggering moment and the length of the minimum clearance position from the blade bottom surface, the blade deformation corresponding to hollow and solid blades is determined; and based on the blade deformation corresponding to hollow and solid blades, the blade-blade compensation clearance at the triggering moment is determined. .

[0067] For example, based on the blade bending stiffness EI, blade stiffness coefficient, blade extension length L over the rotating body, and equivalent load application length... Based on the blade shaft torque at the trigger moment and the distance from the minimum clearance position to the blade bottom surface, the blade deformation corresponding to hollow and solid blades is determined, including: (9) in, Indicates the first Blade deformation under load conditions of hollow blade at each trigger moment; Indicates the first The torque of the hollow blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the hollow blade at each trigger moment; EI represents the blade bending stiffness; L represents the length of the blade extending out of the rotating body; Indicates the length of the equivalent load applied; This indicates the distance from the blade bottom surface to the position of the minimum blade-blade clearance; (10) in, Indicates the first Blade deformation under load conditions of solid blades at each trigger moment; Indicates the first The torque of the solid blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the solid blade at each trigger moment.

[0068] For example, based on the blade deformation corresponding to hollow and solid blades, the blade-blade compensation gap at the triggering moment is determined. ,include: (11) in, Indicates the first Blade deformation under load conditions of solid blades at each trigger moment; Indicates the first Blade deformation under load conditions of hollow blades at each trigger moment.

[0069] Specifically, by determining the torque of the hollow and solid blade shafts at the triggering moment, the distance from the blade-to-blade minimum clearance position to the blade bottom surface, and the equivalent load application length, the deformation of the solid and hollow blades can be calculated in real time, based on the mixer's performance parameters. The blade-to-blade compensation clearance at the triggering moment can then be determined according to the blade deformation.

[0070] In step S17, the blade-blade dynamic clearance corresponding to the triggering moment is determined by using the compensation gap and the distance between the laser sensor and the blade shaft surface. .

[0071] For example, step S17 described above specifically includes: (12) in, This indicates the actual minimum clearance between the blades; Indicates the first The blade-blade compensation gap corresponding to each trigger moment; Lw1 represents the minimum distance between the first laser sensor La1 and the hollow blade shaft surface under no-load conditions; Lw2 represents the minimum distance between the second laser sensor La2 and the solid blade shaft surface under no-load conditions. Indicates the first laser sensor La1 The closest distance to the surface of the hollow blade shaft collected in the second sampling; Indicates the second laser sensor La2 The closest distance to the surface of the solid blade shaft collected in this second sampling.

[0072] Specifically, a data processing unit can be provided to calculate the dynamic blade-to-blade clearance in real time based on the acquired compensation gap and the distance between the blade and the blade surface collected by the laser sensor. This calculation process fully considers the mixer performance under load and the actual impact of materials on the blade movement during mixing, thereby accurately acquiring real-time blade clearance data under load and improving the accuracy of clearance detection. This provides an effective data foundation for the safe control of the mixer.

[0073] In this example implementation, the method further includes: Step S21, based on the blade bending stiffness EI and the stiffness coefficient of the hollow blade The length L of the blade extending beyond the rotating body, combined with the length of the equivalent load applied at the trigger moment. Hollow blade shaft torque The minimum clearance position is the distance from the bottom surface of the impeller, which determines the impeller-mixing pot wall compensation clearance, including: (13) in, Indicates the first The blade-mixing pot wall compensation gap at each trigger moment; Indicates the first The torque of the hollow blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the hollow blade at each trigger moment; EI represents the blade bending stiffness; L represents the length of the blade extending out of the rotating body; This indicates the distance from the blade bottom surface to the position of the minimum clearance between the blade and the pot wall corresponding to the blade marking. Indicates the length of the equivalent load applied; Step S22, based on the impeller-mixing pot wall compensation gap and the distance between the inner wall of the mixing pot and the laser sensor, determines the dynamic gap between the impeller and the pot wall, including: (14) in, Lw1 represents the actual minimum clearance between the blade and the pot wall; Lw2 represents the minimum distance between the first laser sensor La1 and the hollow blade shaft surface under no-load conditions; Lw3 represents the minimum distance between the second laser sensor La2 and the solid blade shaft surface under no-load conditions. Indicates the radius of the hollow blade; The distance between the inner wall of the mixing pot and the first laser sensor La1; The distance between the inner wall of the mixing pot and the second laser sensor La2.

[0074] Specifically, while calculating the dynamic clearance between the blades, the dynamic clearance between the blades and the boiler wall at the trigger moment can also be calculated in real time based on the collected real-time data. In the calculation of the dynamic clearance between the blades and the boiler wall, only the dynamic clearance between the hollow blades and the boiler wall is considered. This reduces the computational workload of calculating the dynamic clearance between the blades and the boiler wall while ensuring the validity of the calculation results.

[0075] In this example implementation, the method further includes: Step S31: Based on the blade radius, blade bending stiffness EI, and blade stiffness coefficient, combined with the equivalent load application length corresponding to the triggering time... The blade shaft torque is used to determine the blade-boiler bottom compensation clearance under load conditions for hollow and solid shaft blades, including: (15) (16) in, This indicates the blade-boiler bottom compensation clearance under hollow shaft blade load conditions; This indicates the blade-boiler bottom compensation clearance under solid shaft blade load conditions; Indicates the radius of the hollow blade; Indicates the radius of a solid blade; Indicates the first The torque of the hollow blade shaft at each trigger moment; Indicates the first The torque of the solid blade shaft at each trigger moment; This represents the stiffness coefficient of the hollow blade. EI represents the stiffness coefficient of a solid blade; EI represents the bending stiffness of the blade. Indicates the length of the equivalent load applied; Step S32: Determine the blade-boiler bottom compensation clearance based on the blade-boiler bottom compensation clearance under the load conditions of hollow shaft blades and solid shaft blades. (17) in, Indicates the first The blade-pot bottom compensation gap at each trigger moment; Step S33: Based on the blade-pot bottom compensation gap, determine the dynamic gap between the blade and the pot bottom corresponding to the triggering moment. ,include: (18) in, This indicates the actual minimum clearance between the paddle and the bottom of the mixing pot.

[0076] Specifically, the compensation gaps between the solid blade shaft, the hollow blade shaft and the bottom of the pot can be calculated simultaneously, and the minimum value can be selected as the blade-bottom compensation gap; then the blade-bottom compensation gap can be used to calculate the blade-bottom dynamic gap at the triggering moment.

[0077] In this example implementation, the method further includes: Step S41: Determine the working state of the blades based on the blade-blade dynamic clearance. Dynamic gap between impeller and boiler wall Dynamic gap between paddle and pot bottom At least one of the following is compared with the corresponding initial gap to determine the amount of gap change; Step S42: Determine the corresponding graded safety interlocking control strategy based on the gap change.

[0078] Specifically, the real-time position of the blades is determined based on the identified blade markings, which in turn determines the blades' operating state, such as the pinch-in or non-pinch-in phase. Different dynamic gaps can be selected for output under different operating states, serving as the data basis for safety control.

[0079] Specifically, when the two blades are in the kneading section, the dynamic gap values ​​between the blade and the pot wall, between the blade and the pot bottom, and between the blades are output. Alternatively, when the two blades are not in the kneading section, the dynamic gap values ​​between the blade and the pot wall and between the blade and the pot bottom are output. The gap values ​​and blade-to-blade position information obtained each time are recorded and saved for comparison in subsequent no-load and load measurements.

[0080] The output dynamic gap can be compared with the initial gap to determine the gap change at the current trigger moment. Based on the gap change, a corresponding hierarchical safety interlocking control strategy can then be determined.

[0081] For example, when the gap change is within the specified range, the device continues normal monitoring; or, if the gap change reaches the first-level warning threshold, an audible and visual warning is activated; if the gap reaches the second-level warning threshold, an output signal is sent to control the stirring spindle to reduce its speed; if the gap reaches the third-level warning threshold, an emergency stop is immediately triggered, cutting off the equipment power supply; if a fault occurs during the monitoring process, the fault self-test module will promptly alarm and lock the equipment. This achieves graded safety interlock control.

[0082] In one exemplary embodiment, the online detection device for the blade gap of the vertical mixer is initialized and calibrated. This online gap detection is used for load mixing of a 100L vertical two-blade mixer, with a single mixing amount of 74 kg.

[0083] When the mixer is under load, the online blade clearance detection device operates in real time. The laser sensor detection assembly detects the distance peak signal, and the clearance compensation unit acquires the output of the image recognition unit. At this moment, the blades are in a kneading state. Based on the online data of the mixing amount and torque, the data processing unit processes the signal to obtain the peak trigger distance. The two blades are in the kneading position, and the minimum blade kneading gap occurs at the blade-bottom of the pot, specifically near the bottom center of the hollow blade in the mixing pot. 间1 =4.1mm; d 壁1i =3.995mm; d 底1 =3.9mm, the blade clearance is within the normal range, and the safety interlock unit outputs that the mixer is functioning normally.

[0084] When the mixer was running for 5 minutes and 12 seconds, the laser sensor detection assembly detected the distance peak signal, and the gap compensation unit acquired the output of the image recognition unit. At this moment, the blades are in a non-kneading state. Based on the online data of the mixing amount and torque, the data processing unit processes the signal to obtain the peak trigger distance. The two blades are in a non-kneading position, and the minimum blade kneading gap occurs at the blade-pot wall, 321mm from the lower end face of the hollow blade. 壁8 =3.995mm; d 底8 =4.0mm, the blade clearance is within the normal range, and the safety interlock unit outputs that the mixer is functioning normally.

[0085] In this example implementation, refer to Figure 5 As shown, an online blade clearance detection device is provided, comprising: an image recognition unit, a laser sensor detection assembly, a clearance compensation unit, a data processing unit, and a safety interlock unit.

[0086] The image recognition unit controls the height camera to acquire images of the blade end face and identifies the acquired images to determine the corresponding blade markings. Specifically, it is mainly used to acquire blade position image information at a specific moment, and perform feature extraction and recognition analysis based on the position of the blade and the markings on the blade end to obtain the positional relationship between the blades in the image. Two high-speed cameras are connected to the two radial flanges of the intermediate cover at a 180° interval and to the laser sensor at a 90° interval.

[0087] The laser sensor detection assembly is used to control the laser sensors to acquire distance data and send the data to the gap compensation unit. Specifically, it is mainly used to measure the distance between the laser sensors and the surfaces of hollow / solid blade shafts. Two laser sensors are connected to the two radial flanges of the intermediate cover, with the two sensors spaced 180° apart.

[0088] The gap compensation unit can be used to determine the triggering time, send the triggering time to the image recognition unit to obtain feedback blade position information, and calculate the compensation gap based on distance data, and send the compensation gap to the data processing unit. Specifically, it mainly calculates the blade load based on the real-time output torque value of the mixer, and calculates the blade deformation and minimum blade gap position based on the blade position information at a specific moment (whether the blade is in the kneading section or the non-kneading section), and calculates the gap compensation value based on the actual blade position information.

[0089] The data processing unit can calculate the dynamic clearance based on the compensation gap and output it to the safety interlock unit. Specifically, it processes the data from the laser displacement sensor assembly and the clearance compensation unit to output the real-time blade clearance value.

[0090] The safety interlock unit performs real-time judgment on the dynamic clearance and outputs corresponding safety control strategies and control signals. Specifically, the explosion-proof safety interlock unit receives the real-time blade clearance value data and compares it with the set value. If the real-time clearance value does not meet the set range, it sends an immediate stop command to the control system.

[0091] For example, both the laser sensor and the high-speed camera can be explosion-proofed and horizontally fixed to the opening of the mixer's intermediate cover via flanges. The remaining modules are installed in the remote control room via electrical wiring harnesses. The laser displacement sensor assembly is mainly used to measure the distance between the laser sensor and the surface of the hollow / solid blade shaft. The two laser sensors are connected to the two radial flanges of the intermediate cover, with the two sensors spaced 180° apart.

[0092] Specifically, the above method is applied to the blade clearance online detection device in this embodiment. The implementation of each module in this device is the same as that in the above method, and will not be repeated in this embodiment.

[0093] The method and apparatus provided in the embodiments of the present invention have the following beneficial effects: 1. Achieve online dynamic non-contact detection: Using laser non-contact detection, there is no need to stop the machine or empty the material. It can detect the gap in real time during the operation of the equipment with material, and truly reflect the dynamic gap changes. Moreover, there is no friction or static electricity generation, making it suitable for flammable and explosive high-risk working conditions.

[0094] 2. Full coverage detection without blind spots: By combining the markings between the blades and the blade end markings with image recognition technology, the position and status of the blades can be identified when the material is covered or obstructed, thus completely solving the technical problem of undetectable gaps caused by material covering in vertical mixers.

[0095] 3. High detection accuracy and strong anti-interference: The dual-path laser sensor design and load state gap compensation algorithm effectively eliminate interference caused by vibration, load deformation, dust, and high metal reflectivity, and the data stability far exceeds that of manual detection.

[0096] 4. Comprehensive safety interlock function: The three-level hierarchical safety control mechanism can provide real-time warnings, speed reductions, and shutdowns based on the degree of clearance deviation, thereby avoiding equipment wear and safety accident risks from the source and improving the inherent safety level of the equipment.

[0097] 5. Wide adaptability to working conditions: The explosion-proof and dustproof structural design of the mixing site components makes it suitable for various special working conditions such as high viscosity, high dust, flammable and explosive, and strong vibration. It is easy to install, highly compatible, and can be adapted to vertical mixers of different volumes and models.

[0098] 6. High level of intelligence: It has automatic calibration, data storage and traceability, and remote transmission functions, and can generate gap detection data reports and cloud maps, which facilitates equipment health status monitoring and production management.

[0099] 7. This invention not only solves the problem of unmeasurable gap under load in vertical mixers, but also, in conjunction with image recognition technology, enables the determination of the minimum gap position under load, providing data support for propellant mixing safety.

[0100] It should be noted that the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Furthermore, it is readily understood that these processes may, for example, be executed synchronously or asynchronously in multiple modules.

[0101] Further reference Figure 5 As shown, this example embodiment also provides an online gap detection device, including: It should be noted that although several modules or units of the device for performing actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to embodiments of the present invention, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0102] Figure 6 A schematic diagram of an electronic device suitable for implementing embodiments of the present invention is shown.

[0103] It should be noted that, Figure 6 The electronic device 1000 shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of the present invention.

[0104] like Figure 6As shown, the electronic device 1000 includes a Central Processing Unit (CPU) 1001, which can perform various appropriate actions and processes based on programs stored in Read-Only Memory (ROM) 1002 or programs loaded from storage section 1008 into Random Access Memory (RAM) 1003. The RAM 1003 also stores various programs and data required for system operation. The CPU 1001, ROM 1002, and RAM 1003 are interconnected via a bus 1004. An Input / Output (I / O) interface 1005 is also connected to the bus 1004. Furthermore, the electronic device 1000 also includes an FPGA device and a System-on-a-Chip (SoC) device.

[0105] The following components are connected to I / O interface 1005: an input section 1006 including a keyboard, mouse, etc.; an output section 1007 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1008 including a hard disk, etc.; and a communication section 1009 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 1009 performs communication processing via a network such as the Internet. A drive 1010 is also connected to I / O interface 1005 as needed. Removable media 1011, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1010 as needed so that computer programs read from them can be installed into storage section 1008 as needed.

[0106] In particular, according to embodiments of the present invention, the processes described below with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a storage medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 1009, and / or installed from removable medium 1011. When the computer program is executed by central processing unit (CPU) 1001, it performs various functions defined in the system of this application.

[0107] Specifically, the aforementioned electronic devices can be airborne intelligent electronic devices, such as airborne video processing equipment.

[0108] It should be noted that the storage medium shown in the embodiments of the present invention can be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium can be a system, apparatus, or device based on electricity, magnetism, light, electromagnetic fields, infrared radiation, or semiconductors, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In the present invention, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present invention, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any storage medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the storage medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0109] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0110] The units described in the embodiments of the present invention can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0111] It should be noted that, as another aspect, this application also provides a storage medium, which may be included in an electronic device or may exist independently without being assembled into the electronic device. The aforementioned storage medium carries one or more programs, which, when executed by an electronic device, cause the electronic device to perform the methods described in the following embodiments. For example, the electronic device may perform... Figure 1 The steps of the method shown.

[0112] In one embodiment, this application provides a computer program product including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.

[0113] Furthermore, the above figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0114] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

[0115] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for online detection of blade clearance in a vertical mixer, characterized in that, The method includes: The clearance parameters of the vertical mixer under no-load conditions were collected; among which, the clearance parameters under no-load conditions included: blade-to-blade initial clearance. Initial gap between paddle and pot wall Initial gap between paddle blade and pot bottom ; Under load, the vertical mixer uses a laser displacement sensor detection assembly to collect distance data between the laser sensor and the surface of the hollow / solid impeller shaft; the triggering time is determined based on the peak signal in the distance data to trigger the online compensation gap calculation for that triggering time; Based on the output torque at the trigger moment Determine the hollow blade shaft torque and solid blade shaft torque at the trigger moment; Combining the length L of the blade extending out of the rotating body and the radius of the mixing pot Material density The material mixing quantity W determines the equivalent load application length corresponding to the triggering time. ; Images of hollow and solid blades are captured using a camera module to determine the blade markings corresponding to the trigger moment. Based on the pre-configured correspondence between blade markings and blade positions, the distance from the blade marking to the blade bottom surface at the minimum blade-to-blade clearance position is determined. The blade markings correspond to the distance from the blade bottom surface to the minimum clearance position between the blade and the pot wall. ; Based on the blade bending stiffness EI, blade stiffness coefficient, blade extension length L over the rotating body, and equivalent load application length. By combining the blade shaft torque at the triggering moment and the length of the minimum clearance position from the blade bottom surface, the blade deformation corresponding to hollow and solid blades is determined; and based on the blade deformation corresponding to hollow and solid blades, the blade-blade compensation clearance at the triggering moment is determined. ; By utilizing the compensation gap and the distance between the laser sensor and the blade shaft surface, the dynamic blade-blade clearance at the trigger moment is determined. .

2. The method according to claim 1, characterized in that, Based on the output torque at the trigger moment Determine the hollow blade shaft torque and solid blade shaft torque at the current triggering moment; including: in, Indicates the first The output torque of the vertical mixer at each trigger moment; Indicates the first The torque of the solid blade shaft at each trigger moment; Indicates the first The torque of the hollow blade shaft at each trigger moment.

3. The method according to claim 1, characterized in that, Combining the length L of the blade extending out of the rotating body and the radius of the mixing pot Material density The amount of material mixed, W, determines the length of the equivalent load applied. ,include: Where L represents the length of the blade extending beyond the rotating body; Indicates the radius of the mixing pot; W represents the density of the material; W represents the amount of material mixed.

4. The method according to claim 1, characterized in that, Based on the blade bending stiffness EI, blade stiffness coefficient, blade extension length L over the rotating body, and equivalent load application length. Based on the blade shaft torque at the trigger moment and the distance from the minimum clearance position to the blade bottom surface, the blade deformation corresponding to hollow and solid blades is determined, including: in, Indicates the first Blade deformation under load conditions of hollow blade at each trigger moment; Indicates the first The torque of the hollow blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the hollow blade at each trigger moment; EI represents the blade bending stiffness; L represents the length of the blade extending out of the rotating body; Indicates the length of the equivalent load applied; This indicates the distance from the blade bottom surface to the position of the minimum blade-blade clearance; in, Indicates the first Blade deformation under load conditions of solid blades at each trigger moment; Indicates the first The torque of the solid blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the solid blade at each trigger moment.

5. The method according to claim 1 or 4, characterized in that, Based on the blade deformation corresponding to hollow and solid blades, determine the blade-blade compensation gap at the triggering moment. ,include: in, Indicates the first Blade deformation under load conditions of solid blades at each trigger moment; Indicates the first Blade deformation under load conditions of hollow blades at each trigger moment.

6. The method according to claim 1, characterized in that, By utilizing the compensation gap and the distance between the laser sensor and the blade shaft surface, the dynamic blade-blade clearance at the trigger moment is determined. ,include: in, This indicates the actual minimum clearance between the blades; Indicates the first The blade-blade compensation gap corresponding to each trigger moment; Lw1 represents the minimum distance between the first laser sensor La1 and the hollow blade shaft surface under no-load conditions; Lw2 represents the minimum distance between the second laser sensor La2 and the solid blade shaft surface under no-load conditions. Indicates the first laser sensor La1 The closest distance to the surface of the hollow blade shaft collected in the second sampling; Indicates the second laser sensor La2 The closest distance to the surface of the solid blade shaft collected in this second sampling.

7. The method according to claim 1, characterized in that, The method further includes: Based on the blade bending stiffness EI and the stiffness coefficient of hollow blades The length L of the blade extending beyond the rotating body, combined with the length of the equivalent load applied at the trigger moment. Hollow blade shaft torque The minimum clearance position is the distance from the bottom surface of the impeller, which determines the impeller-mixing pot wall compensation clearance, including: in, Indicates the first The blade-mixing pot wall compensation gap at each trigger moment; Indicates the first The torque of the hollow blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the hollow blade at each trigger moment; EI represents the blade bending stiffness; L represents the length of the blade extending out of the rotating body; This indicates the distance from the blade bottom surface to the position of the minimum clearance between the blade and the pot wall corresponding to the blade marking. Indicates the length of the equivalent load applied; Based on the impeller-mixing vessel wall compensation gap and the distance between the inner wall of the mixing vessel and the laser sensor, the dynamic gap between the impeller and the vessel wall is determined, including: in, Lw1 represents the actual minimum clearance between the blade and the pot wall; Lw2 represents the minimum distance between the first laser sensor La1 and the hollow blade shaft surface under no-load conditions; Lw3 represents the minimum distance between the second laser sensor La2 and the solid blade shaft surface under no-load conditions. Indicates the radius of the hollow blade; The distance between the inner wall of the mixing pot and the first laser sensor La1; The distance between the inner wall of the mixing pot and the second laser sensor La2.

8. The method according to claim 1 or 7, characterized in that, The method further includes: based on the blade radius, blade bending stiffness EI, and blade stiffness coefficient, combined with the equivalent load application length corresponding to the triggering time. The blade shaft torque is used to determine the blade-boiler bottom compensation clearance under load conditions for hollow and solid shaft blades, including: in, Indicates the first The blade-boiler bottom compensation gap under the load condition of hollow shaft blade at each trigger moment; Indicates the first The blade-boiler bottom compensation gap under solid shaft blade load conditions at each trigger moment; Indicates the radius of the hollow blade; Indicates the radius of a solid blade; Indicates the first The torque of the hollow blade shaft at each trigger moment; Indicates the first The torque of the solid blade shaft at each trigger moment; Indicates the first The stiffness coefficient of the hollow blade at each trigger moment; Indicates the first The stiffness coefficient of the solid blade at each trigger moment; EI represents the blade's bending stiffness; Indicates the length of the equivalent load applied; The blade-boiler bottom compensation clearance is determined based on the blade-boiler bottom compensation clearance under load conditions for hollow shaft blades and solid shaft blades. in, Indicates the first The blade-bowl bottom compensation gap at each trigger moment; Based on the blade-bowl bottom compensation gap, determine the dynamic blade-bowl bottom gap corresponding to the triggering moment. ,include: in, This indicates the actual minimum clearance between the paddle and the bottom of the mixing pot.

9. The method according to claim 1, characterized in that, The method further includes: Determine the operating status of the blades based on the dynamic blade-blade clearance. Dynamic gap between impeller and boiler wall Dynamic gap between paddle and pot bottom At least one of the following is compared with the corresponding initial gap to determine the amount of gap change; The corresponding hierarchical safety interlocking control strategy is determined based on the amount of gap change.

10. The method according to claim 1, characterized in that, The method further includes: The vertical mixer is initialized, and the clearance parameters are calibrated and set. The clearance parameters calibrated and set include: the actual minimum clearance between the blades. The actual minimum clearance between the paddle and the pot wall The actual minimum gap between the paddle and the bottom of the mixing pot. ; The position of the laser sensor is configured, and the detection range of the laser displacement sensor detection assembly is configured according to the distance between the laser and the surface of the blade shaft; wherein, the laser displacement sensor detection assembly includes a first laser sensor La1 and a second laser sensor La2, which are symmetrically arranged on the middle cover of the vertical mixer; The detection range of the laser displacement sensor assembly is configured based on the distance between the laser and the blade shaft surface, including: Lw1-d0≤Lw i ≤Lw2+d0 Where d0 represents the blade-to-blade clearance; Lw1 represents the minimum distance between the first laser sensor La1 and the hollow blade shaft surface under no-load conditions; and Lw2 represents the minimum distance between the second laser sensor La2 and the solid blade shaft surface under no-load conditions.

Images