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工業汽輪起安裝說明書Installation Instruction of Industrial Steam Turbine

原創文章:青島希尼爾翻譯公司 http://www.eacrwc.tw

2014-11-18

(非涉密內容)

Chapter I  Summary

The series of turbines are single double array curtis stage double supported back pressure turbine, and can be utilized to drive various feed pumps, compressors, fans and generators.

The series of turbines include H series and T series industrial steam turbines, with a broad applicable scope of parameters, wherein, inlet steam pressure ranges from 0.15 to 1.6MPa; exhaust pressure ranges from 0.1 to 0.3MPa(absolute pressure); and power ranges from 200kW and 2,000kW.

An industrial steam turbine of the series essentially comprises the following parts: turbine proper and chassis. For details, refer to the List of Supplied Items.

The turbine proper can be either directly connected with the driven machine via coupling, or indirectly connected via a reducer. A speed governing system consists of an electronic speed governor and a mechanical level direct-acting governing valve. The electronic speed governor consists of a HTD industrial steam turbine controller(hereinafter referred to as controller) and an electronic actuator. The controller receives speed load signals, and can realize automatic control of turbine speed and load (for details, refer to the Controller Manul). As the speed governing system adopts a pure electronic speed governor, it has the advantages of large governing range, high precision, strong stability, safety and reliability.

The unit shall be better installed in a single layer plant. Inlet and exhaust pipelines of H series industrial steam turbines are arranged on the same side of the turbines, and that of T series industrial steam turbines may be either installed on the same or different side of the turbines.

In summary of the above, the unit has the advantages of safety, reliability, quick startup, compact structure, convenience, low comprehensive investment, simple maintenance and high automation.

The Manual is only used to help user better know performance and characteristics of the unit, and for reference when the user or the installation unit is compiling a more specific regulations on installation and operation.

 

Chapter II  Introduction to Technical Specification and Structure

Section I  Technical Specification

Model of the industrial steam turbine: B0.2~B2.0 (determined by thermal calculation)

Inlet steam pressure: 0.5~1.6MPa(determined by thermal calculation)

Inlet steam temperature: 260~380℃(determined by thermal calculation)

Inlet steam flow: 2~25t/h(determined by thermal calculation)

Exhaust pressure: 0.1~0.3Mpa(absolute pressure)(determined by thermal calculation)

Rated power: 200~2,000kW(determined by thermal calculation)

Speed: 2,000~3,100rpm

Turbine steering: clockwise along the direction of steam

Machine to be driven: provided by the user

Lube oil: turbine oil 30#

 

Section II  Thermal System

According to different uses of industrial steam turbines, connection of inlet and exhaust pipelines with the system changes correspondingly. The following takes that thermal power plant drives feedwater pump or circulating water pump by industrial steam turbine as an example, to briefly introduce thermal system, as follows:

Steam from extraction pipe of an industrial steam turbine of the power plant enters main stop valve of the industrial steam turbine through isolation valve and enters a cylinder. The steam powered by nozzle block and impulse impeller enters a deaerator or a heater. Condensed drain from valve assembly and the cylinder are directly drained to a trench. The front and rear gland leakage of H series industrial steam turbines is directly emitted to the exhaust pipes of such turbines, and then enters their respective deaerator or heater. The front and rear gland leakage of T series industrial steam turbines is emitted to the exhaust pipes of such turbines through a steam gland extractor, and then enters their respective deaerator or heater.

 

Section III  Turbine Proper

Made of cast steel, the turbine cylinder is divided into cylinder cover and cylinder base. The cylinder cover is a integrity, and the cylinder base consists of a steam chamber and an exhaust hood. The steam chamber and the exhaust hood is electrically welded into a whole with bolts.

Front and rear bearing housings are, as vertical semicircle flanges, connected with front and rear flanges of the cylinder with bolts and dowels. An elastic support is arranged on the cylinder base of the front bearing housing. These parts are arranged on the chassis to form a turbine stator. The rear bearing housing and the chassis are positioned by dowels to form the dead point for thermal expansion of the turbine stator. The elastic support on the lower part of the front bearing housing can absorb axial displacement of the turbine stator caused by thermal expansion. Rotors are axially positioned on the stator by a thrust bearing to form relative dead points.

Turbine rotors are respectively arranged below the sliding bearings on the front and rear bearing housings. A sliding bearing consists of rotors and impeller blades. Turbine rotors, the nozzle block(arranged within the steam chamber) and a steering guide blade ring consistute the flow path of the turbine. The impellers are positioned on the rotors by hot charging process. One end of a rotor is equipped with a joint shaft, on which an emergency governor and a speed transmitting wheel are arranged.

Radial bearing of the turbine is a shell bearing adopting unforced lubrication which produces lube oil by an oil ring. The front bearing is also provided with a thrust bearing (deep groove ball bearing) to bear axial thrust, and its lube oil is sourced from return oil of the front radial bearing. 

Turbine’s gland system consists of front gland and rear gland. Gland of H series industrial steam turbines adopts new carboloy ring mechanical seal structure, while both front and rear glands of T series industrial steam turbines apply stainless steel gland strip.

第一章  概述

    本系列汽輪機是單一雙列復速級雙支點背壓式汽輪機,可用來拖動各類給水泵、壓縮機、風機及發電機。

    本系列汽輪機包括H系列和T系列工業汽輪機,其參數適用范圍比較廣泛,進汽壓力在0.151.6 MPa之間,排汽壓力為0.10.3 MPa(絕對壓力),功率從200 kW直至2000 kW

    本系列工業汽輪機由下列主要部套組成:汽輪機本體、底盤、詳見供應項目清單。

    汽輪機本體與被拖動機械可直接用聯軸器相聯,也可通過減速箱過渡相聯,調速系統由電子調速器與機械杠桿直動調節汽閥組成。電子調速器由HTD工業汽輪機控制器(以下簡稱控制器)和電子執行器組成。控制器接收轉速負荷信號,可實現對汽輪機轉速、負荷進行自動控制(詳見控制器說明書)。由于本調速系統采用純電子式調速器,因此調速范圍大,精確度高,穩定性強,安全可靠。

    機組宜安裝在單層布置的廠房中,H系列工業汽輪機進汽及排汽管道在汽輪機同側,T系列工業汽輪機進汽及排汽管道可在汽輪機同側或異側。

    綜上所述,本機組具有安全可靠、快速啟動、結構緊湊、安全方便、綜合投資低及維護簡便,自動化程度高等一系列優點。

    本說明僅用來幫助用戶更方便地了解本機組的性能和特點,用于作為用戶和安裝單位編制更詳細的安裝和操作規程時參考。

第二章  技術規范及結構介紹

第一節  技術規范

    工業汽輪機型號:B0.2B2.0 (由熱力計算給定)

    進汽壓力:0.51.6MPa( 由熱力計算給定)

    進汽溫度:260380 (由熱力計算給定)

    進汽流量:225t/h (由熱力計算給定)

    排汽壓力:0.10.3Mpa (絕對壓力)(由熱力計算給定)

    額定功率:2002000kW(由熱力計算給定)

轉速范圍:20003100轉/分

 汽機轉向:順汽流方向為順時針

被拖動機械:用戶提供

潤滑油液:30#透平油

第二節  熱力系統

    根據工業汽輪機的用途不同,進汽與排汽聯接系統方式有相應的變化,現以熱電廠用工業汽輪機驅動給水泵或循環水泵為例,簡述熱力系統如下:

    來自電廠汽輪機工業抽汽管的蒸汽,通過隔離閥至工業汽輪機主汽閥并進入汽缸。經噴嘴組、沖動葉輪作功后的蒸汽,進入除氧器或加熱器。從汽閥總成、汽缸中來的凝結疏水直接排入地溝。H系列工業汽輪機前、后汽封漏汽直接排到汽輪機排汽管道中進入除氧器或加熱器。T系列工業汽輪機前、后汽封漏汽經汽封抽汽器,排到汽輪機排汽管道中進入除氧器或加熱器。

第三節 汽輪機本體

    汽輪機汽缸由上、下兩部分組成,其材料均為鑄鋼。汽缸上半為一整體,汽缸下半由蒸汽室、排汽缸兩部分組成。蒸汽室、排汽缸由螺栓及電焊聯接成一整體。

    前、后軸承座以垂直的半圓法蘭分別與汽缸前后法蘭以螺栓及定位銷聯接,前軸承座下部有彈性支承。這些部件一起安裝在底盤上,形成汽輪機靜子。后軸承座與底盤定位銷定位,形成汽輪機靜子熱膨脹的死點。前軸承座下部彈性支承能吸收汽輪機靜子因膨脹而引起的軸向位移。轉子的軸向定位是用推力軸承固定在靜子上,形成相對死點。

    汽輪機的轉子分別安裝在位于前軸承座與后軸承座的滑動軸承卜,它由轉子及葉輪片組成。汽輪機的轉子與噴嘴組(安裝在蒸汽室內)、轉向導葉環組成汽輪機的通流部分。葉輪用熱裝工藝固定在轉子上,轉子一端裝有接長軸,接長軸上裝有危急遮斷器及轉速發訊輪。

    汽輪機的徑向軸承為薄殼軸承,其潤滑方式為甩油環采由的非強制潤滑方式,前軸承還有一個止推軸承(深溝球軸承),承擔軸向的推力,其潤滑油來源于前徑向軸承的回油。

    汽輪機的汽封系統由前后汽封組成,H系列工業汽輪機汽封采用新型炭精環機械密封結構,T系列工業汽輪機前后汽封均采用不繡鋼汽封片結構

 

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