Gas turbine pipeline design method

Abstract

The invention aims to provide a gas turbine pipeline design method, and belongs to the field of gas turbines. Comprising the following steps: building a gas turbine complete machine three-dimensional model; arranging each system accessory; establishing a pipe information base, a pipe fitting information base and a fastener information base for gas turbine pipeline design; determining a starting point, an ending point, a layout area and constraint condition information of the pipeline; pipeline path arrangement is completed one by one; completing strength checking and improvement optimization of all pipelines; establishing a three-dimensional refined design model of the whole gas turbine pipeline; generating all model data required by production of a single pipeline in combination with a gas turbine pipeline production and inspection process; three-dimensional assembly of all system pipelines and a main pipeline of the gas turbine is completed; and in combination with a gas turbine pipeline assembly and inspection process, all model data required by production and assembly of the system pipeline and the gas turbine main pipeline are generated. The refining degree of gas turbine pipeline design is improved, and the requirement for safe and reliable operation of a gas turbine is met.

Description

Technical Field

[0001] The present invention relates to a gas turbine design method, specifically a pipeline design method. Background Art

[0002] As an internal combustion power machine that uses continuously flowing gas as the working medium to drive the impeller to rotate at high speed and convert the energy of fuel into useful work, a gas turbine is a rotary impeller type heat engine. As an important part of the gas turbine, the pipeline system effectively connects each system to ensure the safe and stable operation of the fuel system, lubrication system, ventilation system, unloading system, pneumatic control system, etc. of the gas turbine, and realizes the functions of operation, operation and control of related components of the gas turbine. At the same time, the design and layout of the pipeline system have an important impact on the assembly, reliability, maintainability, aesthetics, etc. of the gas turbine. Therefore, the design level of the pipeline system is an important embodiment of the overall design level of the gas turbine.

[0003] At present, the design method of the gas turbine pipeline system is still based on the design method of two-dimensional principle drawings. For pipelines with limited layout space, even the method of on-site lofting and fitting is used for the layout of the pipeline system, which has many uncertain influencing factors and greatly reduces the design efficiency of the gas turbine pipeline. In addition, there are many types of pipes, pipe fittings and fasteners required for the gas turbine pipeline design, the technical requirements for pipeline processing, assembly and inspection are not clear, the production consideration is insufficient, and the refinement degree is not high, resulting in a large amount of repetitive work in the design of the pipeline system, increasing the production and processing cycle and manufacturing cost of the pipeline. At the same time, there is a lack of effective verification of the pipeline system after the design of the pipeline system is completed, resulting in a large hidden danger of "leakage" after the pipeline is installed, and there is a great potential safety hazard to the safe operation of the unit. Summary of the Invention

[0004] The purpose of the present invention is to provide a gas turbine pipeline design method that can improve the refinement degree of the full three-dimensional design of the gas turbine pipeline, reduce the difficulty of pipeline processing, assembly and inspection, shorten the pipeline production cycle, and improve the operation reliability of the gas turbine.

[0005] The purpose of the present invention is achieved as follows:

[0006] A gas turbine pipeline design method of the present invention is characterized by including the following steps:

[0007] (1) Build a three-dimensional model of the whole gas turbine;

[0008] (2) Arrange the accessories of each system, including the lubrication system, fuel system, ventilation and unloading system, pneumatic control system, cleaning system and sewage system;

[0009] (3) Establish a pipe material information database, pipe fitting information database, and fastener information database for the gas turbine pipeline design;

[0010] (4) Define the starting point, ending point, layout area, and constraint condition information of the pipeline;

[0011] (5) Complete the pipeline path layout root by root for each system;

[0012] (6) Complete the strength check and improvement optimization of all pipelines;

[0013] (7) Establish a three-dimensional refined design model for the entire gas turbine pipeline;

[0014] (8) Combine the gas turbine pipeline production and inspection processes to generate all the model data required for the production of a single pipeline;

[0015] (9) Complete the three-dimensional assembly of the pipelines for each system and the total pipeline of the gas turbine;

[0016] (10) Combine the gas turbine pipeline assembly and inspection processes to generate all the model data required for the production and assembly of the system pipelines and the total gas turbine pipeline.

[0017] The present invention may further include:

[0018] 1. The pipe material information database includes pipeline material, specification, wall thickness, and bending radius information. The pipe fitting information database includes pipe joints, elbows, tees, reducers, pipe clamps, and bracket information. The fastener information database includes gasket, washer, bolt, nut, and lock washer information.

[0019] 2. The wall thickness of the pipeline material satisfies:

[0020] S≥P·d / 2[δ b

[0021] Where: S is the pipeline wall thickness, P is the maximum pipeline pressure, d is the pipeline inner diameter, and [δ b is the allowable tensile strength of the material.

[0022] 3. The bending radius satisfies:

[0023] R=0.5ID

[0024] Where: R is the bending radius, D is the pipeline outer diameter, I is an integer greater than 4. For the minimum bending radius of a metal pipe: when D≤20mm, R min =2D; when D>20mm, R min =3D.

[0025] ​4. The pipeline path layout in step (5) is based on the schematic diagrams of each system of the gas turbine. Select the pipeline specifications from the pipe material information database, select the corresponding joints from the pipe fitting information database as the starting points of the path layout, select the pipe hoop supports as the constraint conditions, and manually select the pipeline layout area.

[0026] 5. The pipeline path layout follows the principle of arranging thick pipes first and then thin pipes. The clearance value between pipelines or between pipelines and components is more than 10 mm.

[0027] 6. The pipeline constraint conditions in step (4) include arranging pipe hoop and support pipe fittings on the pipeline, and setting them at a position 30 - 40 times the outer diameter of the pipeline.

[0028] The advantages of the present invention are as follows: The present invention standardizes the systematic process of gas turbine pipeline design, improves the refinement degree of gas turbine pipeline design, and meets the requirements of safe and reliable operation of gas turbines. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The present invention will be described in more detail with reference to the accompanying drawings as follows:

[0031] Combined with Figure 1 , the gas turbine pipeline design method of the present invention mainly includes three stages: namely, the design preparation stage, the scheme design stage, and the engineering design stage. In the design preparation stage, a three-dimensional model of the entire gas turbine is built, the layout positions of each system accessory are clarified, all design elements required for gas turbine pipeline design are established, and a pipe material information database, a pipe fitting information database, and a fastener information database for gas turbine pipeline design are formed. In the scheme design stage, according to the information such as the starting point, ending point, layout area, and constraint conditions of the pipeline, the pipeline path layout is completed system by system and pipe by pipe. According to the usage requirements of each system pipeline, the strength check and improvement optimization of all pipelines are completed, and a three-dimensional refined design model of the entire gas turbine pipeline is established. In the engineering design stage, combined with the processes such as gas turbine pipeline production, assembly, and inspection, all model data required for the production and assembly of single pipes, system pipelines, and the total gas turbine pipeline are generated.

[0032] The specific steps of the gas turbine pipeline design method of the present invention are as follows:

[0033] S1. Build a three-dimensional model of the entire gas turbine;

[0034] S2. Arrange accessories for each system;

[0035] S3. Establish a pipe material information database, a pipe fitting information database, and a fastener information database for gas turbine pipeline design;

[0036] S4. Specify information such as the starting point, ending point, layout area, and constraint conditions of the pipeline;

[0037] S5. Complete the pipeline path layout system by system and pipe by pipe;

[0038] S6. Complete the strength check and improvement optimization of all pipelines;

[0039] S7. Establish a three-dimensional refined design model of the whole-engine pipeline of the gas turbine;

[0040] S8. Combine the production and inspection processes of the gas turbine pipeline to generate all the model data required for the production of a single pipeline;

[0041] S9. Complete the three-dimensional assembly of the pipelines of each system and the total pipeline of the gas turbine;

[0042] S10. Combine the assembly and inspection processes of the gas turbine pipeline to generate all the model data required for the production and assembly of the system pipeline and the total pipeline of the gas turbine.

[0043] Each system of the gas turbine includes a lubrication system, a fuel system, a ventilation and unloading system, a pneumatic control system, a cleaning system, and a sewage disposal system.

[0044] The gas turbine pipe material information database in the scheme design stage includes the material, specification, wall thickness, and bending radius of the pipeline. The pipe fitting information database includes pipe joints, elbows, tees, reducers, pipe clamps, brackets, and the connecting part information database includes gaskets, bolts, nuts, and lock washers.

[0045] The pipe material should meet the usage requirements of each system of the gas turbine, and the wall thickness of the pipe material should meet:

[0046] S≥P·d / 2[δ b

[0047] Where: S is the wall thickness of the pipeline, unit: mm; P is the maximum pressure of the pipeline, unit: MPa; d is the inner diameter of the pipeline, unit: mm; [δ b is the allowable tensile strength of the material, unit: MPa;

[0048] The pipe material should meet the processing requirements of the gas turbine pipeline, and the bending radius of the pipe material should meet:

[0049] R=0.5ID

[0050] Where: R is the bending radius, unit: mm; D is the outer diameter of the pipeline, unit: mm; I is an integer greater than 4. For the minimum bending radius of a metal pipe: when D≤20mm, R min =2D; when D>20mm, R min =3D.

[0051] ​The pipeline path layout in the technical design stage refers to selecting the pipeline specifications from the pipe material information database, selecting the corresponding joints from the pipe fitting information database as the starting point of the path layout, selecting pipe hoop supports as the constraint conditions, and manually selecting the pipeline laying area according to the schematic diagrams of each system of the gas turbine.

[0052] The pipeline path layout should follow the principle of "thick pipes first and then thin pipes", and ensure that the clearance between pipelines or between pipelines and components is more than 10 mm.

[0053] The pipeline constraint conditions refer to arranging pipe fittings such as pipe hoops and supports on the pipeline, generally set at a position 30-40 times the outer diameter of the pipeline.

[0054] The pipeline strength check and improvement optimization in the technical design stage refer to the strength calculation and natural frequency calculation of the pipeline, improving and optimizing the pipelines that do not meet the strength design requirements, and finally establishing a refined three-dimensional model of the whole machine pipeline of the gas turbine.

[0055] The gas turbine pipeline strength design should meet the following requirements:

[0056] 1) The strength reserve of the gas turbine pipeline should be greater than 1.5;

[0057] 2) The vibration speed corresponding to the natural frequency of the gas turbine pipeline is not within the speed range of all common operating conditions of the gas turbine, and the speed margin should be greater than 15%.

[0058] The model data of the gas turbine pipeline production and assembly in the construction design stage include pipeline materials, specifications, bending information, processing, assembly and inspection technical requirements.

Claims

1. A gas turbine piping design method, characterized in that: The following steps are involved: (1) Build a three-dimensional model of the gas turbine; (2) Arrangement of various system accessories, including lubrication system, fuel system, ventilation and unloading system, pneumatic control system, cleaning system and sewage system; (3) Establish a pipe material information database, pipe fittings information database and fasteners information database for gas turbine pipeline design; (4) Clarify the starting point, end point, layout area and constraint information of the pipeline; (5) Complete the pipeline routing system by system and pipeline by pipeline; (6) Complete the strength verification and improvement and optimization of all pipelines; (7) Establish a three-dimensional refined design model for the gas turbine pipeline; (8) Combined with the gas turbine pipeline production and inspection process, all model data required for the production of a single pipeline are generated; (9) Complete the three-dimensional assembly of gas turbine system pipelines and main pipelines; (10) Combined with the gas turbine pipeline assembly and inspection process, all model data required for the production and assembly of system pipelines and gas turbine main pipelines are generated.

2. A gas turbine piping design method according to claim 1, characterized in that: The pipe information library includes information on pipe materials, specifications, wall thickness, and bending radius; the pipe fittings information library includes information on pipe joints, elbows, tees, reducers, pipe clamps, and brackets; and the fasteners information library includes information on gaskets, washers, bolts, nuts, and locking plates.

3. A gas turbine piping design method according to claim 2, characterized in that: Pipe material wall thickness meets: S≥P·d / 2[δ b ] Where: S is the pipe wall thickness, P is the maximum pressure of the pipe, d is the inner diameter of the pipe, [δ b ] is the allowable tensile strength of the material.

4. A gas turbine pipeline design method according to claim 2, characterized in that: The radius satisfies: R=0.5ID Where: R is the bending radius, D is the outer diameter of the pipe, I is an integer greater than 4, and the minimum bending radius of the metal pipe is: D≤20mm, R min =2D; when D>20mm, R min =3D.

5. A gas turbine piping design method according to claim 1, characterized in that: step( 5) The pipeline path layout is based on the schematic diagram of each system of the gas turbine. The pipeline specifications are selected from the pipe information library, the corresponding joints are selected from the pipe fittings information library as the starting point of the path layout, the pipe clamp bracket is selected as the constraint condition, and the pipeline layout area is manually selected.

6. A gas turbine pipeline design method according to claim 1, characterized in that: The path layout follows the principle of thick pipes first and thin pipes later, and the gap between pipes or between pipes and components is more than 10mm.

7. A gas turbine piping design method according to claim 1, characterized in that: The pipeline constraint conditions in step (4) include arranging pipe clamps and bracket pipe fittings on the pipeline, which are set at a distance of 30-40 times the outer diameter of the pipeline.

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