译文：
随着国民经济的增长和电力工业的需求，上海已经成为全球现代制造业基地和加工中心，作为中国电力设备制造的大型企业，我公司引进UG NX2系统，利用其强大的功能，{zy1}的性能，完善的技术，用信息化带动工业化，将先进的设计方法和制造水平与先进的计算机CAD/CAE/CAM相结合，贯穿于汽轮机设计和制造各个环节，使产品开发设计和制造周期大大缩短，从而降低生产成本，有力地参与国际化的市场竞争。本篇就UG NX2在汽轮机主汽阀设计中的应用作具体介绍。 一．引言 国民经济的长期持续发展必将对电力工业有着更大的需求，进入20世纪后我国的电力设备制造业迎来了又一个春天，作为中国电力设备制造的大型企业，必须适应新的需求，开创新的局面，用信息化带动工业化，使企业能根据市场的需求的瞬间变化，及时作出反馈，调整产品性能，在最短的时间内{zd0}程度地满足客户需要，增强产品竞争力，上海汽轮机有限公司（STC）在95年引进美国西屋公司设计开发技术的基础上，从2001年开始大型汽轮机设计开发平台建立项目，将先进的设计方法和制造水平与先进的计算机CAD/CAE/CAM相结合，贯穿于汽轮机设计和制造各个环节，使产品开发设计和制造周期大大缩短，产品的性能与质量不断提高，改变了以往3至4年开发一只新产品的情况，为企业创造了可观的经济效益和社会效益。 Unigraphics（简称UG）是集CAD/CAE/CAM一体的三维参数化软件，是当今世界{zxj}的计算机辅助设计、分析和制造软件，广泛应用于航空、航天、汽车、造船、通用机械和电子等工业领域。主要为汽车与交通、航空航天、日用消费品、通用机械以及电子工业等领域通过其虚拟产品开发(VPD)的理念提供多级化的、集成的、企业级的包括软件产品与服务在内的完整的MCAD解决方案。自从我公司引进UG NX以来，以其先进的理论、强大的工程背景、完善的功能和专业的技术服务深受广大工程师和专业技术人员的喜爱，并将其{zd0}程度的运用到实际开发、研究和生产制造中去，使我公司的技术手段与国际水准接轨，持续提高新产品的设计周期和设计质量，并使我公司生产出高质量低成本的汽轮机成为现实，有力地参与国际化的市场竞争。 二．汽轮机主汽阀组件概述 主汽阀组件是现代汽轮机中最关键、最重要的部件之一，是汽轮机进汽的大门，对汽轮机的安全运行，起着{zh1}一道保护防线的作用，也就是说，在需要时起到紧急阻断进汽的作用，而在汽轮机启动时来控制汽轮机的转速。 一台汽轮机设有两个主汽阀——调节汽阀组件，分别装于高压缸两侧。每个组件有一个主汽阀和两个调节汽阀，主汽阀和调节汽阀组合在一个整体铸件内。这些阀门的开启和关闭，均采用液压开启，弹簧关闭，DEH控制的方式，即受装在阀上的各自的执行机构所控制。 主汽阀为卧式结构，主阀内部有一内旁通阀，均为单座非平衡式碟阀。当阀门在关闭位置时，进汽压力和压缩弹簧的载荷将两只阀碟同时紧压于其阀座上。主汽阀进汽口处，装有二层滤网——{yj}滤网和临时滤网，以防止异物进入通流部分。汽轮机初次启动并运行一定时间以后，装在外层的临时滤网可以被拆除。 调节阀为立式结构，各由一只油动机控制。油动机直接装在调节阀的上端。油动机活塞向上移动时打开调节汽阀，向下移动时则关闭之。调节汽阀阀杆套筒上有两个漏汽接口，高压接口接至高压缸排汽，低压接口则接至汽封冷却器。 主汽阀——调节阀组件通过支架用地脚螺钉固定在基础上，作为固定死点。此支架能承受用户管道的作用力，并能能保持蒸汽室的位置和适应组件本身的热膨胀。 三．UG NX在汽轮机主汽阀设计中的应用 现代的汽轮机设计方法已从单一功率机组的设计转变为在一定功率范围内的积木块设计方法，有很高技术含量的主汽阀组件作为汽轮机设计中重要的积木块之一，有上百个形状各异的零部件组成，零件数量之庞大，结构形式之复杂，加工工艺之高，传统的利用计算机代替图板绘制图形的二维CAD设计技术显然不能很好的满足这一新的设计方法，而采用先进的UG NX强大的功能、{zy1}的性能来实现设计的自动化，保证设计的合理性和准确性，大大减少了设计工作，缩短产品生产周期。

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原文：
As the national economy growth and the demand for electric power industry, Shanghai has become the world's modern manufacturing base and processing center, as China's power equipment manufacturing of large enterprises, the company introduced UG NX2 system, using its powerful features, superior performance, sound technology, using information technology to stimulate industrialization of advanced design methods and manufacturing levels and advanced computer CAD / CAE / CAM combined permeate all aspects of design and manufacture of steam turbines, so that product development, design and manufacturing cycles are significantly reduced, thus lower production costs, strong participation in international market competition. UG NX2 that this is on the main steam valve in the steam turbine design for specific description. 1. Introduction The long-term sustainable development of the national economy is bound to have a greater demand for the power industry into the 20th century, China's power equipment industry has ushered in a spring, as China's power equipment manufacturing of large enterprises, must adapt to new demands, open a new situation, using information technology to stimulate industrialization, enabling businesses to the needs of the moment according to the market changes, timely feedback, adjust product performance, in the shortest possible time to maximize meet customer needs, enhance product competitiveness, Shanghai Turbine Co., Ltd. (STC) was introduced into the United States in the 95 Westinghouse design and development of technology, based on large-scale steam turbines since 2001, establishment of project design and development platform, an advanced design methods and manufacturing levels and advanced computer CAD / CAE / CAM integration, through the in all aspects of design and manufacture of steam turbines, so that product development cycles shorten design and manufacturing, product performance and quality constantly improving, changing the past 3 to 4 years of developing a new product for enterprises to create considerable economic benefits and social benefits. Unigraphics (abbreviated UG) is a CAD / CAE / CAM integrated 3D parametric software is the world's most advanced computer-aided design, analysis and manufacturing software, widely used in aviation, aerospace, automotive, shipbuilding, general machinery and electronics industrial fields. Primarily for automotive and transportation, aerospace, consumer goods, general machinery, and electronics industry and other fields through its virtual product development (VPD) to provide multi-level concept-oriented, integrated, enterprise-class products and services, including software, including complete MCAD solutions. Since my company has been the introduction of UG NX, with its advanced theory, a strong engineering background, perfect functionality and professional technical service well received by the engineers and professional and technical personnel of the favorite, and its maximum extent into practice development, research and manufacturing in order to enable my company's technology to align with international standards, continuing to improve the new product design cycle and design quality, and enable our company to produce high-quality low-cost turbine become a reality, a strong participation in the international marketplace in competition. 二. Turbine Throttle Valve Components Overview Main steam valve components are most critical of modern steam turbine, one of the most important components is the steam turbine into the door of the safe operation of steam turbines, play a role in the last line of defense to protect one, that is, when required to play Emergency block into the role of steam, while in the turbine starts to control the turbine speed. A steam turbine consists of two main steam valve - adjustable steam valve components, respectively, in the high-pressure cylinder mounted on both sides. Each component has a main steam valve and two adjustable steam valve, main steam valve and adjust the steam valve in the combination of a whole casting. The opening and closing of these valves are used hydraulic pressure to open, spring closed, DEH and controlled manner, that is installed in the valve by the respective implementing agency under the control of. The main steam valve for the horizontal structure, the main valve in an internal bypass valve, both single-seat non-balanced plate valve. When the valve in the closed position when the steam pressure and the compression spring into the load will be two valves at the same time pressed its seat on the disc. The main steam valve steam into the mouth, with two-story strainer - permanent and temporary mesh strainer to prevent foreign matter into the flow section. Turbine first time up and running after a certain time, installed in the outer layer of the temporary filter can be removed. Regulating valve for the vertical structure, each headed by an oil-motivated control. Oil motive directly mounted on the upper end of valve. Oil motive piston moving up steam when you open the regulating valve is closed when the move down. Regulating steam valve stem sleeve, there are two steam leakage interfaces, high-pressure port connected to the high-pressure cylinder exhaust steam, low pressure port is connected to the steam seal coolers. Main steam valve - control valve components of land-pin screw through the bracket fixed on the basis, as a fixed dead. This bracket can withstand the force the user channel, and can maintain the location of the steam room and adapt to the thermal expansion of components of their own. 三. UG NX in the turbine main steam valve design Modern turbine design methods from the design of a single power unit into power in a certain building blocks within the design method, there is a high technological content of the main steam valve components as turbine design, one of the important building blocks, there are hundreds of a composition of various shapes of parts, parts of a large number of structural forms of complex, high processing technology, the traditional use of computer graphics instead of drawing board drawing two-dimensional CAD design techniques are obviously not well positioned to meet this new design approach and the use of advanced UG NX powerful features, superior performance to achieve design automation, to ensure the reasonableness and accuracy of the design, greatly reducing the design work, shorten production cycle.

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