600MW凝汽式汽轮机毕业设计

摘要

本论文的主要任务是，按给定的设计条件，确定通流部分的几何尺寸，力求获得高的相对内效率。汽轮机的通流部分即汽轮机本体中气流的通道，包括调节阀、级的通流部分和排气部分。就汽轮机设计而言，其任务通常是指各级几何尺寸的确定及级的效率和内功率的计算。

首先，分析确定下汽轮机热力设计的基本参数，这些参数包括汽轮机容量、进汽参数、转速、排汽压力或冷却水温度等。分析下汽轮机的型式、配汽机构形式、通流部分形状及有关参数并拟定汽轮机近似热力过程曲线，进行汽耗量及热经济性的的初步计算。

其次，根据通流部分形状要求，确定压力级即非调节级的级数和排气口数，进行各级的比焓降的分配。

最后通过excel 软件进行各级的热力计算，求出各级通流部分的几何尺寸、相对内效率和内功率，确定汽轮机的实际热力曲线。通过校核，确认无误，画出设计中要求的焓熵热力曲线图。

关键字：汽轮机、功率、级的理想比焓降、级的相对内效率,热力过程曲线

Abstract

The main task of this paper is that given by the design of conditions to determine flow section of the geometry, and strive to achieve high efficiency within the relative. Turbine flow turbine that is part of the body in the air channels, including the control valve, the flow of the class and exhaust parts. On the turbine design, its mandate usually refers to all levels of geometry class and the determination of the efficiency and power within the calculation.

First, the analysis of thermal steam turbine design the basic parameters, these parameters, including turbine capacity, into the steam parameters, speed, the exhaust steam pressure or cooling water temperature. Under the type of turbine with steam body form, shape and flow of the relevant parameters and to develop turbine similar to the process of heat, steam and heat consumption of the preliminary economic calculation.

Secondly, some shape-flow requirements to determine that

non-pressure-regulating the level of series and exhaust ports。

at all levels of enthalpy drop than the distribution of software for final adoption excel at all levels of heat, calculated at all levels - The geometry of the flow, the relative efficiency and within the power, determine the actual turbine heat curve. Through verification, confirmation to this effect, draw the design of the requirements of enthalpy entropy heat curve.

Keywords: turbine, power，Enthalpy drop，the efficiency, Thermal curve

目录

摘要 (1)

第1章绪论 (5)

第1节课题研究的目的和背景 (5)

第2节国内外汽轮机设计方法探讨 (6)

1.1引言 (6)

1.2国内外汽轮机组研究现状 (6)

第3节论文研究的主要内容 (9)

第2章汽轮机结构与形式的确定 (11)

2.1汽轮机初参数的确定 (11)

2.1.1主蒸汽及再热蒸汽压力、温度的确定 (11)

2.1.2 汽轮机排汽参数 (12)

2.2汽轮机设计功率与形式的确定 (12)

2.3汽轮机转速和调节方式的确定 (12)

2.4汽轮机热力过程拟定 (13)

2.4.1 各缸进排气参数及圧损的确定 (13)

2.4.2各缸内效率的估定及热力过程线 (15)

第3章回热系统初步拟定 (17)

3.1相关参数确定 (17)

3.1.1 主蒸汽流量G0 (17)

3.1.2 除氧器、高、低加参数，凝汽器参数及加热器温升分配 (18)

3.1.3 分级参数确定 (19)

3.1.4 各级抽气参数确定 (22)

3.2调节级设计 (24)

3.3调节级详细计算 (25)

3.3.1最佳部分进汽度的确定 (25)

3.3.2汽流出口角的选择 (26)

3.3.3调节级的详细计算 (27)

第4章非调节级设计及回热系统校正 (32)

4.1.1 非调节级的级数的确定 (32)

4.1.2各缸非调节级的确定 (33)

4.2中压缸非调节级热力计算 (39)

4.3全机及各缸内功率、内效率计算 (44)