CN110555272A - Intelligent configuration system and method based on luffing mechanism of portal crane - Google Patents
Intelligent configuration system and method based on luffing mechanism of portal crane Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/82—Luffing gear
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Abstract
an intelligent configuration system and method based on a portal crane luffing mechanism, wherein the configuration system comprises a model selection part, a model selection part and a model selection part, wherein the model selection part is used for calculating part parameters and identifying and selecting sample data, and a model selection scheme is generated preliminarily; the configuration part is bidirectionally connected with the model selection part and is used for intelligently configuring the scheme preliminarily generated by the model selection part and checking the configuration result of the preliminarily selected scheme; the main control part is connected with the configuration part and is used for coordinating and controlling all modules of the configuration part; the modeling part is bidirectionally connected with the configuration part; for presenting the mockup to a user; the modeling part is also connected with the model selection part and is used for supplementing the successful cases to a database of the model selection part; the intelligent design of the luffing mechanism of the portal crane obviously improves the design efficiency and quality of port machinery, shortens the development period of products, reduces the design cost of the products and promotes the informatization process of the manufacturing process of enterprises.
Description
Technical Field
the invention relates to the technical field of design of port cranes, in particular to an intelligent configuration system and method based on a luffing mechanism of a portal crane.
background
the port crane is designed according to the characteristics and requirements of port loading and unloading operation. The portal crane is used as mechanical equipment special for the wharf to carry out loading, unloading, carrying and stacking operation, and has the advantages of high-efficiency operation capacity, low cost construction cost, flexibility, strong universality and the like. These advantages make the gantry crane widely used in port and wharf. In the case of inland shipping and coastal medium and small non-specialized docks, gantry cranes have also been burdened with important handling tasks for a considerable period of time.
The product configuration design technology is one of the key technologies for realizing the product design automation and intellectualization at present. However, most of the research on product configuration technology is focused on mass customized production and product family design, while the research on small-batch production is not much, and the gantry crane production is a typical single-piece small-batch production mode based on a customer order, and the production mode enables the mechanical product design of the gantry crane to be personalized and serialized. Therefore, if the product intelligent configuration technology can be applied to the design of a large-sized portal crane, the automation and the intelligent development of the portal crane can be promoted.
at present, the mechanical product design of the gantry crane still depends on the traditional design method and concept, only the functional requirements of the product are considered during the design, and the requirements of other stages in the life cycle of the product on a production model are rarely considered. More importantly, for personalized and serialized product design, the main method adopted at present is to adopt a simulation method to modify and design a drawing similar to an order according to the functional requirements of a customer order and design a new product drawing, and the design mode has a large amount of repeated labor, thereby influencing the improvement of the design efficiency and quality, influencing the informatization process of an enterprise manufacturing process and simultaneously increasing the design cost of a portal crane. In addition, three-dimensional modeling is a necessary trend in product design and is a necessary route for digital models required at various stages of the manufacturing process. The portal crane mainly comprises a mechanism and a structure. The mechanism part mainly comprises four mechanisms of lifting, running, rotating and amplitude variation. And the luffing mechanism comprises a driving device and a metal structure part of the boom system, so that a product configuration strategy and a method for specially researching the luffing mechanism of the portal crane are necessary, and the method has important practical significance and theoretical significance for the design of the whole portal crane and the design of other port cranes.
the intelligent design of the luffing mechanism of the portal crane is a special intelligent configuration method aiming at the design of the luffing mechanism of the portal crane on the basis of a three-dimensional model of a product. The design method comprises the steps of considering the requirement information of each stage of each life cycle of a product from the beginning, establishing a principle model, a product structure model and an intelligent configuration model of gantry crane design, and carrying out dynamic configuration on a historical design model to the greatest extent according to the functional requirements and parameters of a customer order to generate parts of a new product; if the parts cannot be generated by the configurator, they are redesigned by the designer and included in the data model of the product structure.
The intelligent design of the luffing mechanism of the portal crane obviously improves the design efficiency and quality of port machinery, shortens the development period of products, reduces the design cost of the products and promotes the informatization process of the manufacturing process of enterprises.
disclosure of Invention
the invention aims to provide an intelligent configuration system and method based on a luffing mechanism of a portal crane, which at least solve the problems that the traditional mechanical design only considers the functional requirements of products, rarely considers the requirements of other stages in the life cycle of the products on production models, and adopts a simulation method to modify and design drawings similar to orders in the traditional mechanical design, so that the efficiency is low and the quality is poor.
in order to achieve the above purpose, the invention provides the following technical scheme:
an intelligent configuration system based on a portal crane luffing mechanism preferably mainly comprises a model selection part, a main control part, a configuration part and a modeling part. The model selection part is mainly responsible for calculating parameters of all parts and identifying and selecting sample data, and a model selection scheme is generated preliminarily; the model selection part is in bidirectional connection with the configuration part, namely the configuration part can intelligently configure the scheme generated by the model selection part preliminarily, check the configuration result of the preliminary scheme, and feed back the check result to the model selection part to modify and add the sample library of the model selection part; the main control part is a bridge connecting the user and the configuration part and is also a key factor for well coordinating and controlling all modules of the configuration part, on one hand, the configuration condition proposed by the user is input through a system human-computer interface, the configuration condition is quantized into a target variable and transmitted to the configuration part, and on the other hand, the relationship among all modules of the configuration part is reasonably coordinated; the modeling part is mainly presented to a user entity model and is also in bidirectional connection with the configuration part, the modeling part can not only display entity modeling of a final determination scheme of the configuration part, but also provide a designed excellent example for the configuration part to accelerate the configuration process, and meanwhile, the modeling part is also connected with the model selection part, namely the modeling part can supplement the final success case to the original database of the model selection part in the form of a part sample.
The intelligent configuration system based on the portal crane luffing mechanism preferably comprises a scheme selection module and a parameterized part library management module. The configuration part comprises a configuration evaluation module, a configuration reasoning module and a product structure module. The main control part comprises a system human-computer interface and a main control module. The modeling part comprises a three-dimensional model assembly display module, a solid modeling, a part expansion module and a system database. The output end of the main control module is respectively connected with the input end of the product structure module, the input end of the configuration reasoning module and the input end of the configuration evaluation module, the output end of the parameterized part library management module, the output end of the scheme selection module, the output end of the product structure module and the output end of the configuration evaluation module are respectively connected with the input end of the configuration reasoning module, in addition, the output end of the parameterized part library management module is also connected with the input end of a product structure module and the input end of a configuration evaluation module, the product structure module is in bidirectional connection with a three-dimensional model assembly display module, the output end of the three-dimensional model assembly display module is connected with the input end of a part expansion module, the output end of the part expansion module is connected with the input end of a system database module, and the output end of the system database module is connected with the input end of the parameterized part library management module.
Preferably, the scheme selection module comprises a design scheme selection of a rigid four-bar combined arm support system of the portal crane luffing mechanism and a scheme selection of a luffing mechanism driving device. The rigid four-bar linkage combined arm frame comprises a main arm frame, a large pull rod, a small pull rod and a trunk frame, and the driving device comprises a motor, a speed reducer, a brake, a coupler, a transmission shaft and other standard parts.
Preferably, the parameterized part library management module is mainly used for managing establishment, maintenance and updating of an instance library and a knowledge library. The knowledge base management comprises the extraction and expression of configuration knowledge, the parameterization of configuration conditions, the correction and the update of the knowledge base and the like. In the design process of the luffing mechanism of the portal crane, according to a group of design requirements or configuration conditions, a configuration system is automatically mapped into a group of configuration variables, and the configuration variables are represented as values of a series of configuration variables; the example library management mainly comprises example matching and screening, example modification, example recovery and the like.
preferably, the product structure module is mainly responsible for building and maintaining a product structure tree, defining and modifying a basic product model, instantiating a model sample, instantiating a part and managing a redesigned version of the part. And the system is responsible for extracting entity model data from the three-dimensional system, is connected with the graph library and the instance library through the parameterized part library management module, extracts leaf node graphs and instances on the product structure tree, and prepares corresponding structure model objects for configuration reasoning of product parts.
the intelligent configuration system based on the portal crane luffing mechanism preferably realizes the product intelligent design of the portal crane luffing mechanism from parts to parts according to a product structure model object provided by a product structure module and a reasoning rule provided by a knowledge base, and comprises the selection of parts of a luffing mechanism part driving device, the variable parameter design or the variable characteristic design of a rigid four-link combined arm support of the luffing mechanism, the determination of the secondary variable parameter design or the secondary variable characteristic design of a non-standard part, the integral assembly configuration of the luffing mechanism part and the like through example extraction, comparison and screening.
in the intelligent configuration system based on the gantry crane luffing mechanism, preferably, the configuration evaluation module applies the configuration constraint to evaluate or appropriately modify the configuration result of the configuration inference module, and if necessary, the contents of the instance base and the knowledge base can be added and modified.
according to the intelligent configuration system based on the luffing mechanism of the portal crane, preferably, the main control module coordinates and controls other modules, the main control module is connected with the display and the input device, and a man-machine interaction interface is formed through the display and the input device, so that an engineer can conveniently debug the system or a user can conveniently use the system.
a configuration method of an intelligent configuration system based on a portal crane luffing mechanism preferably comprises the following steps:
step 1, inputting relevant design parameters and predicted cost in a human-computer interaction interface of a system according to the requirements of a user;
step 2, inputting a model selection scheme in a scheme model selection module according to a result calculated by the system;
Step 3, the models of the parts which are selected one by one primarily are transmitted to a configuration reasoning module, and the configuration reasoning module realizes the product intelligent configuration of the portal crane luffing mechanism from the parts to the parts according to the product structure model object provided by the product structure module and the reasoning rule provided by the knowledge base;
Step 4, after the intelligent configuration is completed, evaluating the configured scheme through an intelligent configuration evaluation module to ensure the integrity and consistency of the configuration result;
Step 5, if the amplitude-changing mechanism formed by intelligent configuration does not meet the input model selection scheme and the estimated cost after evaluation, repeating the step 2 to the step 4 until the formed amplitude-changing mechanism meets the requirements of users and can be actually produced, and then displaying the amplitude-changing mechanism which finally meets the requirements through a three-dimensional model assembly display module;
step 6, manually judging the displayed three-dimensional model of the part, if the three-dimensional model of the part is unqualified, re-inputting the model selection scheme, and repeating the steps 2 to 5 until the judgment is qualified; and supplementing the qualified part three-dimensional model to a system database through a part expansion module, and leading the newly added data into a parameterized part library management module by the system database so as to form a complete endless loop configuration system.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
the intelligent design of the luffing mechanism of the portal crane obviously improves the design efficiency and quality of port machinery, shortens the development period of products, reduces the design cost of the products and promotes the informatization process of the manufacturing process of enterprises.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a schematic structural diagram of an intelligent configuration system of a luffing mechanism of a portal crane according to an embodiment of the invention;
FIG. 2 is a flowchart illustrating the operation of the intelligent configuration system for the luffing mechanism of the portal crane according to the embodiment of the present invention;
fig. 3 is a specific structural diagram of a rigid four-bar linkage combined arm support of a luffing mechanism of a portal crane according to an embodiment of the invention;
fig. 4 is a layout diagram of the components of a luffing mechanism drive of a portal crane according to an embodiment of the present invention.
In the figure, 1, a main control module; 2. a scheme model selection module; 3. a system human-computer interface; 4. an instance base; 5. a knowledge base; 6, a graphic library; 7. a parameterized part library management module; 8. configuring an inference module; 9. assembling a display module by the three-dimensional model; 10. a part extension module; 11. a product structure module; 12. configuring an evaluation module; 13. solid modeling; 14; a system database.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
in the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
according to the specific embodiment of the present invention, as shown in fig. 1, the intelligent configuration system mainly includes a model selection part, a main control part, a configuration part and a modeling part. The model selection part is mainly responsible for calculating parameters of all parts and identifying and selecting sample data, and a model selection scheme is generated preliminarily; the model selection part is in bidirectional connection with the configuration part, namely the configuration part can intelligently configure the scheme generated by the model selection part preliminarily, check the configuration result of the preliminary scheme, and feed back the check result to the model selection part to modify and add the sample library of the model selection part; the main control part is a bridge connecting the user and the configuration part and is also a key factor for well coordinating and controlling all modules of the configuration part, on one hand, the configuration condition proposed by the user is input through the system human-computer interface 3, the configuration condition is quantized into a target variable and transmitted to the configuration part, and on the other hand, the relationship among all modules of the configuration part is reasonably coordinated; the modeling part is mainly presented to a user entity model and is also in bidirectional connection with the configuration part, the modeling part can not only display the entity modeling 13 for the final determination scheme of the configuration part, but also provide a designed excellent example for the configuration part to accelerate the configuration process, and meanwhile, the modeling part is also connected with the model selection part, namely the modeling part can supplement the final success case to the original database of the model selection part in the form of a part sample. The model selection part comprises a scheme model selection module 2 and a parameterized part library management module 7. The configuration section includes a configuration evaluation module 12, a configuration inference module 8, and a product structure module 11. The main control part comprises a system human-computer interface 3 and a main control module 1.
The modeling section includes a three-dimensional model assembly display module 9, a solid modeling 13, a part extension module 10, and a system database 14. The output end of the main control module 1 is respectively connected with the input end of the product structure module 11, the input end of the configuration reasoning module 8 and the input end of the configuration evaluation module 12, the output end of the parameterized part library management module 7, the output end of the scheme selection module 2, the output end of the product structure module 11 and the output end of the configuration evaluation module 12 are respectively connected with the input end of the configuration reasoning module 8, in addition, the output end of the parameterized part library management module 7 is also connected with the input end of a product structure module 11 and the input end of a configuration evaluation module 12, the product structure module 11 is bidirectionally connected with a three-dimensional model assembly display module 9, the output end of the three-dimensional model assembly display module 9 is connected with the input end of a part expansion module 10, the output end of the part expansion module 10 is connected with the input end of a system database 14 module, and the output end of the system database 14 module is connected with the input end of the parameterized part library management module 7.
according to the specific embodiment of the present invention, as shown in fig. 2, a working flow chart of the intelligent configuration system of the luffing mechanism of the portal crane according to the present invention provides a configuration method of the intelligent configuration system based on the luffing mechanism of the portal crane, the configuration method includes the following steps:
step 1, inputting relevant design parameters and predicted cost in a human-computer interaction interface of a system according to the requirements of a user;
Step 2, inputting a model selection scheme in a scheme model selection module 2 according to a result calculated by the system;
step 3, the models of the parts which are selected one by one primarily are transmitted to a configuration reasoning module 8, and the configuration reasoning module 8 realizes the product intelligent configuration of the luffing mechanism of the portal crane from the parts to the components according to the product structure model object provided by the product structure module 11 and the reasoning rule provided by the knowledge base 5;
Step 4, after the intelligent configuration is completed, the configured scheme is evaluated through the intelligent configuration evaluation module 12, and the integrity and consistency of the configuration result are ensured;
Step 5, if the amplitude-changing mechanism formed by intelligent configuration does not meet the input model selection scheme and the estimated cost after evaluation, repeating the step 2 to the step 4 until the formed amplitude-changing mechanism meets the requirements of users and can be actually produced, and then displaying the amplitude-changing mechanism which finally meets the requirements through a three-dimensional model assembly display module 9;
Step 6, manually judging the displayed three-dimensional model of the part, if the three-dimensional model of the part is unqualified, re-inputting the model selection scheme, and repeating the steps 2 to 5 until the judgment is qualified; and supplementing the qualified part three-dimensional model to a system database 14 through a part expansion module 10, and leading the newly added data into a parameterized part library management module 7 by the system database 14 so as to form a complete endless loop configuration system.
according to a specific embodiment of the present invention, step 2 specifically includes the following steps:
Step 21, determining the length of a main arm frame of the combined arm frame system, the length of a front arm and a rear arm of an trunk frame and the length of a pull rod according to the maximum amplitude, the minimum amplitude, the lifting height, the multiplying power of a lifting pulley block and the diameter of a pulley and the overall design or arrangement requirement, determining the positions of a lower hinge point of the arm frame and a lower hinge point of the pull rod, performing example matching and screening from a parameterized part library management module 7 through a scheme selection module 2, and determining a preliminary design scheme of a rigid four-bar mechanism of the luffing mechanism if the designed optimal example can meet the working requirement of the luffing mechanism; if the source example can not meet the design requirement, turning to step 3, solving through a rule reasoning mechanism, and determining the design scheme of the rigid four-bar linkage mechanism through the difference comparison of the new example and the old example;
step 22, the dead weight of each component of the mechanism and the dead weight of the movable counterweight can be obtained through the primarily determined rigid four-bar linkage scheme, so that parameters such as amplitude-changing equivalent resistance, hoisting point speed and the like are determined, and the amplitude-changing mechanism driving device is further subjected to model selection by the system through the scheme model selection module 2 according to the calculated design parameters, wherein the model selection mainly comprises standard parts such as a motor, a reducer, a brake, a coupler, a high-speed transmission shaft and the like; the computer calculates each part through a programmed program, so that samples which accord with the checking calculation result are selected from each sample library, then a design engineer selects the samples manually, the samples are input into the scheme selection module 2, the starting time and the acceleration of the motor are checked through the system, the amplitude variation speed is checked, and the system outputs a whole set of part selection list of the driving device after the checking is passed;
And step 23, matching the main arm frame system of the amplitude-changing mechanism with the driving device through the scheme selection module 2, and further outputting a set of complete primary overall scheme of the amplitude-changing mechanism.
According to an embodiment of the present invention, step 3 further includes the following steps:
Step 31, performing primary check on the primarily determined scheme; according to the specification required by a user, the amplitude-changing mechanism required by the user carries out checking on relevant constraint conditions such as the calculated wind pressure of the second type wind load and the third type wind load, the starting time and the acceleration of the motor of the amplitude-changing mechanism, the amplitude-changing speed and the like;
step 32, instantiating the model samples and parts which pass the checking; the product structure module 11 extracts entity model data from the three-dimensional software system, is connected with the graph library 6 and the instance library 4 through the parameterized part library management module 7, extracts graphs and instances of various samples and parts, and provides corresponding structure model objects for the configuration inference module 8;
step 33, the knowledge base 5 combines the rule reasoning mechanism and the instance reasoning mechanism to form a mixed reasoning mechanism, namely, firstly, the rule configuration base is accessed, and the rule reasoning mechanism is used for determining the variable parameter design or the variable characteristic design of the luffing mechanism; if the design is unsuccessful, the secondary variable parameter design or variable characteristic design of the luffing mechanism is completed by using an example reasoning mechanism, and a design scheme is determined by similar example extraction, example comparison and screening; if the secondary variable parameter design or variable characteristic design fails or the cost is considered to be too large after the evaluation of the example scheme, redesigning;
And step 34, the configuration reasoning module 8 realizes the product intelligent configuration of the luffing mechanism of the portal crane from parts to parts according to the product structure model object provided by the product structure module 11 and the reasoning rule provided by the knowledge base 5, and determines the integral assembly configuration of the luffing mechanism.
According to an embodiment of the present invention, step 4 further includes the following steps:
Step 41, each actually produced part has configuration constraint, for example, whether spatial interference exists when all the members of the rigid four-bar linkage are assembled with each other or not, whether the working principle of the four-bar linkage is satisfied or not, whether the arrangement of the amplitude variation mechanism driving device satisfies spatial arrangement constraint or not, and whether all the parts can be correctly assembled or not;
step 42, the configuration evaluation module 12 evaluates the configuration result of the configuration inference module 8 by applying the configuration constraint, and judges whether the configuration result meets the input model selection scheme and the estimated cost by applying a geometric assembly interface rule and a functional interface rule as evaluation basis;
Step 43, if the configuration evaluation conclusion is satisfied, ensuring the integrity and consistency of the configuration result; valuable experience and knowledge in the work are reserved, and the part versions in the design scheme are put into a knowledge base 5 and an example base 4; if the configuration evaluation conclusion is unsatisfactory, skipping to the step 5;
The step 5 specifically comprises the following steps:
Step 51, analyzing the reason for dissatisfaction of the configuration result of the configuration inference module 8 according to the conclusion obtained by the intelligent configuration evaluation module 12, and further taking specific measures to appropriately modify the design scheme;
step 52, if the rigid four-bar linkage mechanism does not meet the configuration result, changing each bar, reducing the thickness of the bar, adjusting the length of the bar, and the like, and rebuilding mould checking until the conditions are met;
step 53, if the luffing mechanism driving device does not meet the configuration result, applying the geometric assembly interface rule and the functional interface rule, redesigning the scheme to perform instance assembly matching, or redesigning individual parts, and if necessary, adding and modifying the contents of the instance library 4 and the knowledge library 5;
Step 54, repeating the step 2 to the step 4 until the configuration result of the configuration inference module 8 is satisfied by the evaluation of the configuration evaluation module 12, indicating that the overall design scheme and the overall layout of the luffing mechanism meet the requirements of users and actual production, and then displaying the final required overall layout diagram of the luffing mechanism through the three-dimensional model assembly display module 9;
the step 6 specifically comprises the following steps:
step 61, the three-dimensional model assembly display module 9 is connected with a display, and the entity modeling 13 of the main arm frame system and the amplitude variation driving device of the amplitude variation mechanism is derived in three-dimensional software, so that a user and an engineer can more visually see the final design scheme of the amplitude variation mechanism, and manual judgment is facilitated;
step 62, an engineer can compare the three-dimensional model with an existing similar example according to previous abundant design experience to judge, the three-dimensional model can be introduced into dynamic simulation software to perform virtual prototype analysis, and a user can click a specific part to display three views and related parameters of the part, so that manual judgment is more accurate and considerable;
Step 63, if the entity model is judged to be unqualified by manual judgment, re-inputting the model selection scheme, and repeating the steps 2-5 until the judgment is qualified; and supplementing the qualified part three-dimensional model to a system database 14 through a part expansion module 10, and leading the newly added data into a parameterized part library management module 7 by the system database 14 so as to form a complete endless loop configuration system.
fig. 3 is a detailed structural diagram of a rigid four-bar combined arm support of a luffing mechanism of a gantry crane, which consists of an elephant trunk frame, a large pull rod and a main arm support according to a specific embodiment of the invention. The four-bar mechanism is formed by the hinge shaft connection between the trunk frame and the main arm frame and the large pull rod and the hinge shaft connection between the main arm frame and the turntable and between the large pull rod and the propeller strut, namely the double-rocker mechanism taking the lower hinge point of the arm frame and the rear hinge point of the large pull rod as pivots. When the variable-amplitude work is carried out, the lifted goods move approximately horizontally according to the motion trail of the trunk frame head. The trunk frame is a component directly bearing a hoisting load, and when the trunk frame is intelligently configured, the length of the front arm and the length of the rear arm of the trunk frame are mainly considered, namely the front end point and the rear end point of the trunk frame are respectively arranged at the positions of hinge points connected with the main arm frame and the trunk frame. The main arm support is a component with the most complex stress in an arm support system, the head of the main arm support is hinged with the trunk support, the root of the main arm support is hinged with the rotary table, the main arm support bears larger load action on a longitudinal plane and a transverse plane, and the length of the main arm support is also one of parameters considered in intelligent configuration. In addition, the structural form of the propeller strut is also very critical in the intelligent configuration of the boom system, a large pull rod, a balance beam and a guide pulley support are arranged on a cross beam at the top of the propeller strut, a luffing mechanism platform is connected to a cross beam in the middle of the propeller strut, and the propeller strut needs to support and transfer loads applied to all the parts. Because the gantry crane arm support system has large dead weight and the weight of a lifting load, a balance system is usually designed to balance the dead weight, and the system usually adopts a lever movable counterweight form and consists of a balance beam, a small pull rod and a movable counterweight. The balance beam is supported on a cross beam at the top of the propeller strut, and the small pull rod is connected with the balance beam and the main arm frame through a hinge point to form a plane four-bar mechanism together with the propeller strut. When the intelligent configuration scheme is selected, the length of the small pull rod and the weight of the movable counterweight are also selection parameters. An example of the invention contemplates the use of rack drive as the drive form of the horn, the rack-type horn drive arrangement being shown in fig. 4.
fig. 4 is a layout diagram of components of a luffing mechanism driving device of a portal crane according to an embodiment of the invention, wherein a motor is driven by a power supply to rotate to provide power. The output shaft of the motor is connected with the high-speed transmission shaft through the high-speed coupler, the other end of the high-speed transmission shaft is connected with the speed reducer through the high-speed coupler, thereby transmitting the torque of the motor to the reducer, but in a balanced type arm support system, a higher amplitude variation speed is often adopted, great load change can occur in the work, in order to stop the vehicle when the maximum load occurs and not generate large vibration due to over-violent braking when the minimum load occurs, when not in work, the maximum wind pressure in a non-working state can be borne to keep the arm support from being blown by wind, therefore, a brake is required to be assembled at the connecting part of the speed reducer and the high-speed transmission shaft, the output end of the speed reducer is connected with a driving pinion, the pinion can be matched on a bearing to realize rotation, meanwhile, the upper part of the driving pinion is meshed with the rack to drive the rack to do linear motion, and the rack swings around the axis of the pinion during amplitude variation. The intelligent configuration process of the driving device starts with the selection of the type of the motor, selects the motor type meeting the requirements from the parameterized part library, carries out related checking and checking calculation according to the parameters, then the diameter selection of the transmission shaft is determined and the strength checking calculation is carried out, the transmission ratio required by the actual operation of the speed reducer can be determined according to the rotating speed of the motor and the rotating speed of the driving gear, thereby selecting and checking the speed reducer, selecting the brake according to the larger braking force required in the working state and the non-working state when the brake is selected, the maximum static torque on the brake wheel is related to the amplitude variation resistance on the rack, the reference circle diameter of the driving gear and the transmission ratio of the speed reducer, the calculated torque of the coupling depends on the torque converted from the rated torque of the motor to the torque on the coupling, two high-speed couplings and one low-speed coupling can be selected according to the calculated torque, the diameter of the motor shaft and the input shaft of the speed reducer. The intelligent configuration system derives a three-dimensional model in three-dimensional software according to the assembly relation among the parts, and generates a driving device layout diagram as shown in fig. 4 at the same time, so that a designer and a user can more intuitively see a scheme result.
According to the specific embodiment of the invention, the scheme selection module 2 comprises the design scheme selection of a rigid four-bar combined arm support system of the luffing mechanism of the portal crane and the scheme selection of a luffing mechanism driving device. The rigid four-bar linkage combined arm frame comprises a main arm frame, a large pull rod, a small pull rod and a trunk frame, and the driving device comprises a motor, a speed reducer, a brake, a coupler, a transmission shaft and other standard parts.
According to an embodiment of the present invention, the parameterized part library management module 7 mainly manages the establishment, maintenance, and updating of the embodiment library 4 and the knowledge library 5. The knowledge base 5 management comprises extraction and expression of configuration knowledge, parameterization of configuration conditions, correction and update of the knowledge base 5 and the like. In the design process of the luffing mechanism of the portal crane, according to a group of design requirements or configuration conditions, a configuration system is automatically mapped into a group of configuration variables, and the configuration variables are represented as values of a series of configuration variables; the example library 4 management mainly comprises example matching and screening, example modification, example recovery and the like.
According to the embodiment of the present invention, the product structure module 11 is mainly responsible for building and maintaining a product structure tree, defining and modifying a basic product model, instantiating a model sample, instantiating a part, managing a redesigned version, and the like. And is responsible for extracting entity model data from the three-dimensional system, and is connected with the graph library 6 and the instance library 4 through the parameterized part library management module 7 to extract leaf node graphs and instances on the product structure tree and prepare corresponding structure model objects for configuration reasoning of product parts.
according to the specific embodiment of the invention, the configuration reasoning module 8 realizes the product intelligent design of the luffing mechanism of the portal crane from parts to parts according to the product structure model object provided by the product structure module 11 and the reasoning rule provided by the knowledge base 5, and comprises the selection of parts of a luffing mechanism part driving device, the variable parameter design or variable characteristic design of a rigid four-link combined arm support of the luffing mechanism, and the determination of the secondary variable parameter design or secondary variable characteristic design of a non-standard part, the integral assembly configuration of the luffing mechanism parts and the like through example extraction, comparison and screening.
according to the embodiment of the invention, the configuration evaluation module 12 applies the configuration constraint to evaluate or appropriately modify the configuration result of the configuration inference module 8, and if necessary, the contents of the instance base 4 and the knowledge base 5 may be added or modified.
According to the specific embodiment of the invention, the main control module 1 coordinates and controls other modules, the main control module 1 is connected with a display and an input device, and a man-machine interaction interface is formed by the display and the input device, so that an engineer can conveniently debug the system or a user can conveniently use the system.
the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An intelligent configuration system based on a gantry crane luffing mechanism, the configuration system comprising:
the model selection part is used for calculating part parameters and identifying and selecting sample data to preliminarily generate a model selection scheme;
The configuration part is bidirectionally connected with the model selection part and is used for intelligently configuring the scheme primarily generated by the model selection part, checking the configuration result of the primarily selected scheme, and feeding back to the model selection part according to the check result to modify and add the sample library of the model selection part;
the main control part is connected with the configuration part and is used for coordinating and controlling all modules of the configuration part;
A modeling portion bidirectionally coupled to the deployment portion; for presenting the mockup to a user; the modeling part is also connected with the model selection part and is used for supplementing successful cases to the database of the model selection part.
2. The intelligent configuration system based on a portal crane luffing mechanism of claim 1,
The model selection part comprises a scheme model selection module and a parameterized part library management module;
the configuration part comprises a configuration evaluation module, a configuration reasoning module and a product structure module;
the main control part comprises a system human-computer interface and a main control module;
The modeling part comprises a three-dimensional model assembly display module, an entity modeling, a part expansion module and a system database;
The output end of the system human-computer interface is connected with the input end of the main control module;
The system human-computer interface comprises a display and an input device, wherein the display and the input device form a human-computer interaction interface for system debugging and user use.
3. the intelligent configuration system based on the luffing mechanism of the portal crane according to claim 2, wherein the output terminal of the main control module is connected to the input terminal of the product structure module, the input terminal of the configuration inference module, and the input terminal of the configuration evaluation module, respectively; the output end of the parameterized part library management module, the output end of the scheme selection module, the output end of the product structure module and the output end of the configuration evaluation module are respectively connected with the input end of the configuration reasoning module.
4. The intelligent configuration system based on the luffing mechanism of the portal crane according to claim 2, wherein the product structure module is bidirectionally coupled to the three-dimensional model assembly display module; the output end of the three-dimensional model assembly display module is connected with the input end of the part expansion module; the output end of the part extension module is connected with the input end of the system database module; and the output end of the system database module is connected with the input end of the parameterized part library management module.
5. the intelligent configuration system based on the luffing mechanism of the portal crane as set forth in claim 2 or 3, wherein the scheme selection module comprises design scheme selection of a rigid four-bar combined boom system of the luffing mechanism of the portal crane and scheme selection of a luffing mechanism driving device;
Preferably, the rigid four-bar linkage combined arm support comprises a main arm support, a large pull rod, a small pull rod and a trunk support, and the driving device comprises a motor, a speed reducer, a brake, a coupler and a transmission shaft.
6. The intelligent gantry-based luffing mechanism configuration system of claim 2, wherein the parameterized component library comprises a graph library, an instance library, and a knowledge library; the configuration evaluation module applies configuration constraints to evaluate or appropriately modify the configuration result of the configuration inference module, and the configuration evaluation module can also add and modify the contents of the instance base and the knowledge base;
the product structure module extracts entity model data from a three-dimensional system and is connected with the graphic library and the instance library through the parameterized part library management module; the product structure module is used for establishing and maintaining a product structure tree, defining and modifying a basic product model, instantiating a model sample, instantiating a part and managing a redesigned version.
7. the method of configuring a portal crane luffing based intelligent configuration system as recited in any one of claims 1 to 6, comprising the steps of:
Step 1, inputting relevant design parameters and predicted cost in a human-computer interaction interface of a system according to the requirements of a user;
Step 2, inputting a model selection scheme in a scheme model selection module according to a result calculated by the system;
step 3, the models of the parts which are selected one by one primarily are transmitted to a configuration reasoning module, and the configuration reasoning module realizes the product intelligent configuration of the portal crane luffing mechanism from the parts to the parts according to the product structure model object provided by the product structure module and the reasoning rule provided by the knowledge base;
step 4, after the intelligent configuration is completed, evaluating the configured scheme through an intelligent configuration evaluation module to ensure the integrity and consistency of the configuration result;
Step 5, if the amplitude-changing mechanism formed by intelligent configuration does not meet the input model selection scheme and the estimated cost after evaluation, repeating the step 2 to the step 4 until the formed amplitude-changing mechanism meets the requirements of users and can be actually produced, and then displaying the amplitude-changing mechanism which finally meets the requirements through a three-dimensional model assembly display module;
Step 6, manually judging the displayed three-dimensional model of the part, if the three-dimensional model of the part is unqualified, re-inputting the model selection scheme, and repeating the steps 2 to 5 until the judgment is qualified; and supplementing the qualified part three-dimensional model to a system database through a part expansion module, and leading the newly added data into a parameterized part library management module by the system database so as to form a complete endless loop configuration system.
8. The configuration method of the intelligent configuration system based on the luffing mechanism of the portal crane according to claim 7, wherein the step 2 further comprises the following steps:
step 21, determining the length of a main arm frame of the combined arm frame system, the length of a front arm and a rear arm of an trunk frame and the length of a pull rod according to the maximum amplitude, the minimum amplitude, the lifting height, the multiplying power of a lifting pulley block and the diameter of a pulley and the overall design or arrangement requirement, determining the positions of a lower hinge point of the arm frame and a lower hinge point of the pull rod, matching and screening examples from a parameterized part library management module through a scheme selection module, and determining a preliminary design scheme of a rigid four-link mechanism of the luffing mechanism if the designed optimal examples can meet the working requirement of the luffing mechanism; if the source example can not meet the design requirement, turning to step 3, solving through a rule reasoning mechanism, and determining the design scheme of the rigid four-bar linkage mechanism through the difference comparison of the new example and the old example;
step 22, the dead weight of each component of the mechanism and the dead weight of the movable counterweight can be obtained through the primarily determined rigid four-bar linkage scheme, so that parameters such as amplitude-variable equivalent resistance, hoisting point speed and the like are determined, and the amplitude-variable mechanism driving device is further subjected to model selection by the system through a scheme model selection module according to the calculated design parameters, wherein the model selection mainly comprises standard parts such as a motor, a reducer, a brake, a coupler, a high-speed transmission shaft and the like; the computer calculates each part through a programmed program, so that samples meeting the checking calculation result are selected from each sample library, then a design engineer carries out manual selection and inputs the samples into a scheme selection module, the system checks the starting time and the acceleration of the motor and checks the amplitude variation speed, and the system outputs a whole set of driving device part selection list after the checking is passed;
and step 23, matching the main arm frame system of the amplitude-changing mechanism with the driving device through the scheme model selection module, and further outputting a set of complete primary overall scheme of the amplitude-changing mechanism.
9. the configuration method of the intelligent configuration system based on the luffing mechanism of the portal crane according to claim 7, wherein the step 3 further comprises the following steps:
Step 31, performing primary check on the primarily determined scheme; according to the specification required by a user, the amplitude-changing mechanism required by the user carries out checking on relevant constraint conditions such as the calculated wind pressure of the second type wind load and the third type wind load, the starting time and the acceleration of the motor of the amplitude-changing mechanism, the amplitude-changing speed and the like;
step 32, instantiating the model samples and parts which pass the checking; the product structure module extracts entity model data from the three-dimensional software system, is connected with the graph library and the instance library through the parameterized part library management module, extracts graphs and instances of various samples and parts, and provides corresponding structure model objects for the configuration reasoning module;
step 33, the knowledge base fuses the rule reasoning mechanism and the instance reasoning mechanism to form a mixed reasoning mechanism, namely, firstly, the rule configuration base is accessed, and the rule reasoning mechanism is used for determining the variable parameter design or the variable characteristic design of the luffing mechanism; if the design is unsuccessful, the secondary variable parameter design or variable characteristic design of the luffing mechanism is completed by using an example reasoning mechanism, and a design scheme is determined by similar example extraction, example comparison and screening; if the secondary variable parameter design or variable characteristic design fails or the cost is considered to be too large after the evaluation of the example scheme, redesigning;
And step 34, the configuration reasoning module realizes the product intelligent configuration of the luffing mechanism of the portal crane from parts to components according to the product structure model object provided by the product structure module and the reasoning rule provided by the knowledge base, and determines the integral assembly configuration of the luffing mechanism.
10. the configuration method of the intelligent configuration system based on the luffing mechanism of the portal crane according to claim 7, wherein the step 4 further comprises the following steps:
step 41, each actually produced part has configuration constraint, for example, whether spatial interference exists when all the members of the rigid four-bar linkage are assembled with each other or not, whether the working principle of the four-bar linkage is satisfied or not, whether the arrangement of the amplitude variation mechanism driving device satisfies spatial arrangement constraint or not, and whether all the parts can be correctly assembled or not;
step 42, the configuration evaluation module evaluates the configuration result of the configuration inference module by applying the configuration constraint, applies a geometric assembly interface rule and a functional interface rule as evaluation basis, and judges whether the configuration result meets the input model selection scheme and the estimated cost;
Step 43, if the configuration evaluation conclusion is satisfied, ensuring the integrity and consistency of the configuration result; valuable experience and knowledge in the work are reserved, and the part versions in the design scheme are put into a knowledge base and an instance base; if the configuration evaluation conclusion is unsatisfactory, skipping to the step 5;
the step 5 specifically comprises the following steps:
step 51, analyzing the reason for dissatisfaction of the configuration result of the configuration inference module according to the conclusion obtained by the intelligent configuration evaluation module, and further taking specific measures to properly modify the design scheme;
step 52, if the rigid four-bar linkage mechanism does not meet the configuration result, changing each bar, reducing the thickness of the bar, adjusting the length of the bar, and the like, and rebuilding mould checking until the conditions are met;
step 53, if the luffing mechanism driving device does not meet the configuration result, applying the geometric assembly interface rule and the functional interface rule, redesigning the scheme to perform instance assembly matching, or redesigning individual parts, and if necessary, adding and modifying the contents of an instance base and a knowledge base;
step 54, repeating the step 2 to the step 4 until the configuration result of the configuration inference module is satisfied by the evaluation of the configuration evaluation module, indicating that the overall design scheme and the overall layout of the luffing mechanism meet the requirements of users and actual production, and then displaying the final luffing mechanism overall layout graph meeting the requirements through a three-dimensional model assembly display module;
the step 6 specifically comprises the following steps:
Step 61, the three-dimensional model assembly display module is connected with a display, and the entity models of the amplitude variation mechanism main arm frame system and the amplitude variation driving device are derived in three-dimensional software, so that a user and an engineer can more visually see the final design scheme of the amplitude variation mechanism, and manual judgment is facilitated;
step 62, an engineer can compare the three-dimensional model with an existing similar example according to previous abundant design experience to judge, the three-dimensional model can be introduced into dynamic simulation software to perform virtual prototype analysis, and a user can click a specific part to display three views and related parameters of the part, so that manual judgment is more accurate and considerable;
step 63, if the entity model is judged to be unqualified by manual judgment, re-inputting the model selection scheme, and repeating the steps 2-5 until the judgment is qualified; and supplementing the qualified part three-dimensional model to a system database through a part expansion module, and leading the newly added data into a parameterized part library management module by the system database so as to form a complete cycle configuration system.
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