【 Solution 】 Super super equipment in engineering

【 Solution 】 Super super engineering equipment - 2018 11 - 25 ( Timken) Recently, a known by the industry as the 'world-class super engineering', the official start of the sea tunnel drivage construction. This is domestic first level highway underwater tunnel with the function of urban road and the domestic first is located in the 8 degree earthquake intensity OuDeDun tunnelling. Channel length 6680 meters, 3047 of shield construction. Within the scope of 5 meters, at the same time, the tunnel across the sea from a large number of high strength of the boulder and three long 182 meters bedrock protrusions, difficulty in the world are numbered. This is the eastern route of the tunnel, shantou bay is located in the gulf bridge has been built and curb the direction. Completion of the tunnel will greatly improve the shantou south north shore connecting, driving the development of shantou region as a whole. In the process of tunnel construction, shield machine is undoubtedly the most critical equipment. Due to the complexity of the shantou bay tunnel with geological, construction difficulty greatly, security risk level is high, as the task of shield machine for gulf special hydrogeological conditions of tunnel engineering 'tailored'. The shield of the shield machine cutter diameter of 15. 01 m, equivalent to five storeys high, total length of 130 meters, the total weight of 4600 tons, total power of 10800 kw, and adopted the international shield the forefront of manufacturing technology, have often ( Belt) Pressure swing in knife, the knife dish telescopic, advance geological forecast, advanced drilling, and other functions, is domestic currently 'high, refined, sharp in the tunnel construction machinery. Shantou gulf used currently one of the largest diameter of shield tunnel machine of shield machine is the basic working principle of a steel cylinder components move forward along the tunnel axis side to dig soil. With strong ability of driving, shield machine in the tunnel engineering of various geological structure through some mountains strips lake sea, let itself allows. Modern shield machine has high degree of automation, saving manpower, construction speed is quick, a into a cave, and is not affected by the climate controlled when excavating, etc, especially in the tunnel hole line is longer than the other, under the condition of large buried depth, more as an economic and reasonable mining method. And in the process of tunnel construction, hard rock will wear shield body and seriously reduces the working efficiency of shield machine. In addition, if frequent changing the key parts such as bearings, will further delay the construction period, high cost, low efficiency. To cope with the challenge of various external factors, and ensure the effective running, shield machine must use high reliability of the bearing. Company in the field of shield machine with decades of professional experience, relying on the authority of the cone roller bearing products and services to global customers. 铁姆肯公司® Single row circular cone roller bearings can carry at the same time the axis of rotation and the radial and axial load of the bearing, and because of its enhanced performance and is widely used in shield construction machine. The world's first batch of shield machine is adopted Timken® Bearings. 铁姆肯公司® Excellent properties of tapered roller bearings: select high-quality advanced heat treatment process of steel l l l internal geometry structure optimization Timken® Typical application of tapered roller bearing of shield machine, in addition to conventional tapered roller bearings, timken facing tough working condition of shield construction machine for further innovation, introduced the innovation of the higher performance product DuraSpexx® Power density series bearings. 铁姆肯公司® DuraSpexx® Power density series bearing adopts special surface engineering technology, under the same working environment bearing fatigue life can be extended to twice the standard bearing, and bearing capacity increased by 23%. The efficiency of shield machine is very important. According to different application environment requirement for fatigue life, we can also according to customer requirements customization DuraSpexx® Bearings. 铁姆肯公司® DuraSpexx® Main features: l enhanced materials, reduce the damage caused by the steel material. L ultra precision grinding machining, in the high temperature and the lubricating oil film is too thin, reduce the surface spalling and fatigue. L design with geometric convex degrees modification, in the case of high load and/or eccentric evenly distributed stress. Shantou bay tunnel is expected in 2020 is expected to open to traffic on March, after the completion of article 6 will be shantou bay sea-crossing passage, can be as a new landmark channel shantou gulf. New channel of the series of overseas economic and cultural cooperation future experimental zone, shantou port of the economic zone bordering on the harbor and other important coastal economic zone of about 38 km long coastal highway, again through the chenghai district hundred entertainment way and the construction of national road 228 encountered ChaoNa area, southern smoothly through the east coast and hao gong south shore! In large engineering projects around the world, timken relies on high quality products and strong technical strength to make the first selection of shield machine bearing suppliers, for many customers with the best matching solution, reduce the bearing failure and bring down the cost. In the future, timken will continue to leading products and technologies to bring value for customers, high efficiency of power engineering innovation.