Finite Element Analysis of Cooling Tube Strength of High Pressure Air Compressor

Finite Element Analysis of Cooling Tube Strength of High Pressure Air Compressor Lu Qingming Meng Wenhui Wang Gang 21. Military Representative Office of Wuhan Factory, Wuhan 430000, Hubei; 2. Shenyang Gas Compressor Research Institute, Shenyang, Liaoning, 25 applications.

1In the petrochemical and military and other compressor supporting products, such as hydrogenation reactor ultra-high pressure polyethylene reactor ammonia synthesis tower and various high-pressure ridges and pressure cooling tube groups are subject to relatively pressure and load, wall stress Greatly catching the island. One near or exceeding the yield strength of the material belongs to the category of contractile mechanics. The pressure cooling group analyzed in this paper. In addition to the pressure load. There is also a temperature difference load inside and outside, and a large temperature difference stress is generated. It can be seen from the elastic mechanics that the stress analysis of the cooling tube can be classified as plane strain. The human milk 3 finite element analysis software can be easily completed. 4, the strength finite element analysis of the high pressure air compressor cooling tube.

Introduction to 打 兀 兀 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限 有限Based on the computational modality, the idea of ​​piecewise approximation is used to make the development and application of the system governing equations in the local region to solve. As the main method of numerical solution, the limit element method can solve a variety of solid mechanics problems, such as the static dynamic state of the rod and the shell including the thin plate and the thick shell of the shell, and the static dynamic state of the dimension and the solid. Stability elastic viscoelastic questions and large deformation questions and so on.

After more than 40 years of development, the finite element method has been quite rich in form and the theory is quite perfect. Based on modern mechanics, computer simulation is used as the means to optimize the finite element analysis. Modern engineering technology has been rapidly developed. In the process of developing new products, it not only reduces the cost of product development, but also improves the reliability of product design. It can also use computer simulation technology to replace the actual system with physical models and mathematical models. Well, the performance of the new product can be predicted at the design stage, thus greatly shortening the product development cycle. Currently, advanced. Universal and dedicated finite element analysis software is iASTI! The application of Ai.ANSYS.MSC finite element analysis software provides great convenience for engineers and technicians. In the finite element calculation, the more complicated parts, such as the discrete analysis of the structure of the unit analysis, can use finite element analysis. The operating platform of the software, through the finite element modeling, the application of the load to solve the calculation of the results of the calculation, the calculation of the strength of the compressor cooling tube is taken as an example, and the method and steps of the finite element analysis by the application 5 are introduced.

3 The limit of the strength of the high-pressure cooling pipe is analyzed. 3.1 Description 40 stations, 3 high-pressure air compressor The final stage cooler is a shell-and-tube structure, the gas is taken away, and the water is taken away. The cooling pipe is made of 30 copper pipe, the specification is apricot 164.5. The inner wall temperature of the cooling pipe is 130, the outer wall temperature of the cooling pipe is 8 cooling pipe design, and the 1 force is 401 liquid strength test. The Lokson ratio of the 60 sen 3 village material is 0.286. The thermal conductivity of the village material is 0.0294. The reference temperature is 20. The finite element analysis method is used to check the strength of the high-pressure cooling pipe from different conditions such as temperature load working load and temperature and working load coupling.

3.2 Establishment of the finite element model The establishment of the finite element model of the high-pressure cooling pipe needs to complete the following main internal boundary setting work directory designation job name and analysis of the thermal stress analysis of the standard high-pressure cooling pipe 1.3151.1; out; 0 also; define the interface interface filter parameters Select the thermal power 71 into the analysis category; use the unit in the same unit system before the bit; define the unit type and select the 6-node angular entity in the entity 8, 1 , ie, 135 As early as 16135. Set the option to train the child to think that the plane is asked, 1; define the heat transfer coefficient of the material, 1 path is 3.5, and use the elbow 1 to mesh, in which the unit M1 side length is set to 0.4. Cooling tube finite element model

3.3 Steady-state thermal analysis After the finite element modeling of the cooling tube is completed, the temperature is defined as 130 for all nodes inside and outside the finite element model, and the temperature is defined at 80. The finite element model is completed. After the definition of the temperature boundary conditions, the solution of the steady-state thermal analysis is performed. Through the results analysis of the general post-processor, the temperature field distribution of the whole structure can be obtained, and the curve of the wall along the radial temperature, such as 3.4 structural stress analysis, is used for structural stress analysis. First, the analytical model is transformed into a finite element model of the true 35 unit, which is 1; 25 is set to 1 bar 2, 1 is 4, 13 is, 1 plane strain 1 and then the elastic modulus of the material is defined 20 followed. The thermal analysis obtained from 1 is stored in the file 301 as the first load step; finally, the current load is solved. Through the use of the ground embedding device, the analysis of the Xianjin Ding Jiyu seems to be the stress distribution under the load of the whole structure, and the temperature difference between the inner and outer pipe wall is distributed, and the equivalent stress value of each point on the cross section of the cooling pipe is 61. The distribution of the cooling pipe along the 似-like differential stress is 4, the distance from the inner wall to the outer wall of the cooling axis in the radial direction, the unit is the stress value of the corresponding point in the longitudinal coordinate of Pan, the unit is elbow, 3 3733 respectively, the radial circumference of the cold point is 4 axial directions. Equivalent stress, the result, the 塍 加 加 舰 舰 舰 舰 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Structural stress analysis. 3.4 has completed the analysis process of the first load step. Now, as long as the loading of the second load step is completed, the application of the internal pressure load of the gas is completed, and finally the two load steps are solved, and the cooling tube can be obtained. Structural stress analysis results of temperature difference and gas internal pressure.

First, a load of 40 is applied to the inner diameter of the tube, and the load is stored as a second load step. 502; then use 5,16 corpse his corpse to solve the multi-load, LSMIN starting load step number input l, LSMAXzmpmmxzLSINCi long input through 06, general post-processor analysis results, can get the result of 1316 and 34 is the same, the result of 516 mouth 2 is the stress distribution of the cooling tube under the action of temperature difference and gas internal pressure, the internal and external wall stress distribution cloud 5, the curve along the radial stress.

3.6 Structural stress analysis when the cooling pipe is only subjected to internal pressure In order to facilitate the analysis of the influence of the gas force temperature difference load on the cooling pipe, the stress distribution when the cooling pipe is only subjected to the gas force is listed below, 60 篾, hydraulic strength test state analysis results 9 and 3.7 Analysis of calculation results It can be seen from the above analysis and calculation results that in the dangerous working load of the high-pressure cooling pipe, it can be seen from 4 and 6 that the high-pressure gas in the cooling pipe is in a favorable condition for the cooling pipe within the constant pressure range, the above cooling The various states of the pipe, only the state in which the temperature difference and the gas internal pressure work together, and the 60-leg, hydraulic strength test state are independent. However, in these two different states, the stress of the former high-pressure cooling pipe in the working state is sufficient. It can be found from 6 that the equivalent stress 3 at the inner wall node of the cooling pipe is safe.

4 Conclusions At present, various general-purpose and special-purpose finite element analysis softwares provide engineers and technicians with a friendly operation platform with their unique functions. The entire analysis process of the finite element method, such as the discretion unit analysis of the structure, is completely analyzed. Included in the analysis software, the operator can easily obtain the desired results as long as the operator successfully completes the key processes such as modeling loading of the analysis. In the force analysis of complex structures, especially in the various dynamic response analysis of structures, the application of finite element analysis software is more convenient.

5 Conclusions In all combinations of scroll geometry parameters that meet compressor design requirements and scroll processing requirements, there is always a set of scroll geometry that minimizes the sum of the friction loss and leakage damage generated on the scroll.

An optimal design method based on the geometry of the scroll with the smallest sum of friction loss and leakage loss generated on the scroll is proposed.

Yu Yongzhang. Handbook of volumetric compressor technical manual. Beijing Machinery Industry, Zhu Jie, Qu Zongchang, and so on. Deformation analysis blade of the scroll compressor scroll. Compressor technology, 199829.

4 Liu Xingwang. Optimum design of the geometric parameters of the scroll-type scroll compressor, Lanzhou Lanzhou University of Technology, 205.

Cheng Shi. Ph.D. student, the main research direction of gas compression machinery theory and application, has been issued

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