Research On Structure And Sealing Performance Of Antenna Array Cabin Door

With the continuous development of radar technology,the complexity of its internal electronic system has also increased,so the area of the radar antenna array becomes larger.In order to facilitate the installation and maintenance of the electronic system,the internal space of the array is divided into electronic cabins.The electronic system is placed in the cabin and a number of doors are installed outside the cabin.When the electronic system needs to be installed,repaired and replaced,the cabin-door can be opened for disposal.The airtightness and ease of operation of the cabin-door are important,so the mechanical structure of the cabin-door needs to be studied.The airtightness test is required for the produced cabin-door.In order to detect the gas leakage rate of the door under constant pressure,this paper needs to study the appropriate gas leakage quantitative detection device.In this paper,with the design of electronic cabin door,the main research work includes:(1)Studied the overall plan and overall design of the electronic cabin door structure.In view of the problem that the drive locking mechanism requires single point operation and multi-point locking,this paper designed the transmission mechanism of the door.According to the characteristics of the linear movement of the locking point during the movement of the transmission mechanism,this paper designed the locking mechanism of the door.Aiming at the problem that the sealing strip on the side of the hinge of the common hinge door is easy to be worn and the sealing performance of the door is poor,this paper designed the hinge mechanism of the door.In view of the poor sealing performance of the door hinge part,this paper designed the sealing structure of the door shaft.Based on the determination of the structure of each part of the door,this paper developed the overall structure of the door to verify whether the locking process of the door structure meets the design requirements.In order to verify whether the airtightness of the door structure meets the design requirements,the airtightness of the door should be checked.Since the airtightness test needs a closed container,the design of the cabin structure matched with the door was formed.The internal inspection space laid the foundation for the airtightness test of the following doors.The portability of the door locking operation is very important.In order to obtain the operating force of the door drive locking mechanism,this paper analyzed and calculates the force of the locking process of the door.(2)Studied seal strip material selection and material parameter determination.In view of the poor sealing performance of the door,this paper studied and compares the commonly used sealing strip materials,and selected the appropriate sealing strip materials to lay the foundation for the selection of the sealing strips.Due to the complex mechanical properties of the rubber material of the sealing strip,the determination of the material parameters requires relevant test data.Therefore,this paper studied different types of rubber materials and selects the appropriate rubber material testing method to lay the foundation for the rubber test data.Due to the Mullins effect of the rubber material,the rubber samples were tested under different strain loadings.Since the rubber sample can't be restored to its original state after the tensile test,there was residual strain.Therefore,this paper studied the inaccuracy of the rubber material test data,and processed the test data to conformed to the true tensile process of the sample,which lays the foundation of the rubber material parameter fit.In order to obtain the material parameters of rubber,this paper needed to select the appropriate constitutive model of rubber material,and obtained the parameters of the constitutive model by fitting the tensile test data of the sample.In view of the selection of rubber material parameters,the compression test and compression simulation analysis of the sealing strip were carried out respectively.The comparison between the simulation results and the test results determined the appropriate rubber material parameters,which lays a foundation for the simulation analysis of the following door seals.(3)Studied the design of the gas leak detection system and the air tightness test of the seal.In order to verify whether the airtightness of the door meets the design requirements,the airtightness test of the developed door is required.Due to the special requirements of the airtightness test of the door,this paper needed to design a suitable gas leakage detection system.Therefore,in this paper,combined with the airtightness test requirements of the cabin-door,several common airtightness detection methods were studied to determine the overall scheme of the gas leak detection system design.According to the overall scheme of the detection system,this paper designed a gas leak detection system,and selected the appropriate system components to build a gas leak detection system which lays the foundation for the air tightness test of the door.In order to verify whether the detection system meets the requirements of air tightness test,this paper studied the fluctuation of air pressure during the test.Due to the existence of the piston rod in the cylinder,it is not convenient to calculate the total volume of the cylinder air.Therefore,the calculation formula of the gas leakage rate was given for the problem that the system detection result is not easy to calculate.In this paper,the airtightness test was carried out on the sealing strips of different sections respectively.According to the test results,the appropriate section of the door seal strip was selected to complete the selection process of the door sealing strip.In this paper,the airtightness test of the door seals under different compression amounts was carried out,and the minimum compression amount that the seals should meet was determined by comparing the test results.It laid the foundation for the simulation analysis to judge the sealing performance of the door.(4)Studied the simulation analysis of the door structure and the air tightness test of the door.Due to the large size of the door of this article,in order to ensure the sealing performance of the door,the door needs to be installed with multiple locking points.The door panel will be deformed under the action of multiple locking points,which will cause the distribution of the compression of the door sealing strip to be inconsistent.Therefore,this paper studied the compression of the sealing strip under the action of the locking point by simulation analysis.The process laid the foundation for the design of the number of locks on the door.The simulation analysis of the door was carried out in the finite element software.Therefore,this paper needed to establish the finite element model according to the actual structure of the door,which laid a foundation for the simulation analysis of the door structure.According to the design problem of the number of locking points of the door,in the case of different number of locking points of the door,the distribution of the compression amount of the sealing strip was obtained through simulation analysis,and the number of locking points was determined according to the simulation result.In order to verify whether the airtightness of the door meets the requirements,the airtightness test of the designed door was carried out.