KP for compressors prototype NK-16ST

Contents

Contents

1. Goals and objectives

2. Compressor Head Split

3. LPC calculation

3.1 Preliminary calculation of LPC

3.2 LPC incoming calculation

4. HPC calculation

4.1 HPC preliminary calculation

4.2 HPC incoming calculation

5. Profiling

5.1 Calculation of flow parameters by height of HPC stage 2 blade according to the law of constant circulation

5.2 Profiling of HPC 2nd stage RC

6. Strength calculation

7. Prototype Description

Conclusion

List of sources used

Appendix A

1. Course Design Objectives and Objectives

The purpose of the course project is to develop practical skills for performing design calculations and drawing up relevant documentation when designing gas turbine plant compressors.

Design tasks: perform analysis of initial design data; determine the number of compressor stages; perform thermogasodynamic calculation of compressor flow through the middle current line; perform profiling of the compressor stage according to the specified law; build profiles of rotor blades and guide vanes on the root, middle and peripheral radii of the compressor stage; develop a prototype compressor design; identify the most loaded elements of the compressor design and perform their strength calculation; draw up the graphic part of the project and the calculation and explanatory note.

Description of prototype operation

Low pressure compressor (LPC) - four-stage. All rotor and guide vanes operate only on the inner circuit, pressurize and supply air to the high-pressure compressor (HPC) through channels in the middle support. LPC consists of rotor and stator. Rotor rests on roller bearing in front support and on ball bearing in middle support. Axial forces acting on LP compressor rotor are perceived by ball bearing. LP compressor shaft is connected to LP turbine shaft by means of special bolt device. Torque from turbine is transmitted to compressor rotor through splines made on shafts. LP compressor rotor design includes: - front shaft; - four disks; - blades; - three intermediate rings; - rear shaft; -. labyrinth. LP compressor rotor units are connected and torque is transmitted by centering bolts. Front shaft is made of titanium alloy and is attached to end face of I stage disk. Bushing for installation of front roller bearing assembly is pressed on shaft. Front shaft has splines for oil pump drive gear. Discs made of titanium alloy have hub, diaphragm and rim. Dovetail-type slots are made in rim.

Rotor blades are mounted in slots of disks. Rotor blades have airfoil, lock. Blades are made of titanium alloy. The blades in the discs are attached by a dovetail lock.

High-pressure compressor - eight-stage. HP compressor consists of rotor and stator. The HP compressor rotor, together with the HP turbine of the stage, rotates on two bearings: a front ball mounted in the middle support of the engine, and a rear roller mounted in the rear support of the engine. Air compressed in HP compressor is discharged to axial direction in guide vanes of stage 12 and is supplied to combustion chamber. The HP compressor rotor performs air compression work from the LP compressor.

Conclusion

During the course project, the following tasks were completed:

Axial compressor made on A1 sheets of graphic part is designed.

2 HPC stage is profiled on A1 sheet of graphic part.

The working drawing of the rotor blade 2 steps of KVD on sheet A1 of a graphic part is executed.