TongYu provides wind turbine mains shaft for various corporations, like GE Energy, Vestas, GAMESA, Suzlon, Anderson, Sinovel, Guodian Union, CSIC Wind Power, Nanjing NGC Group, etc.

Nk 1616seating

41P was recovered on November 10, 2016, at apparent magnitude 21 by Pan-STARRS.[1] On April 1, 2017, the comet passed 0.142 AU (21,200,000 km; 13,200,000 mi) from the Earth.[8] The comet was expected to brighten to around magnitude 7 and be visible in binoculars.[2][9]

Nk 1616departures

Main Shaft for MW-class Wind Turbines TongYu has now become one of the world's largest production bases of MW-class wind turbine shaft, which is a core part in wind turbine to connect wind mill and gearbox or engine. Wind turbine main shafts are manufactured from steel ingots with forging, heat treatment, and finishing processes.

Discovered by Horace Parnell Tuttle on May 3, 1858, and re-discovered independently by Michel Giacobini and Ľubor Kresák in 1907 and 1951 respectively, it is a member of the Jupiter family of comets.

Flight1616

Since the cost of replacing shafts is rather high, so the quality requirements in producing them must be high. The service life of TongYu main shaft is generally to be at least 20 years. Main shaft for MW-class wind turbine possesses large dimension. It calls for high requirements in performance, flaw detection, and metallographic structure.

Manufacturing Process Smelting – Forging – Heat Treatment – Roughing – Quenching and Tempering – Machining – Coating –Packaging

As of June 1, 2006, Comet 41P was a 10th magnitude object for telescopes, located on the Cancer-Leo border, with a predicted maximum of about 10 at perihelion on June 11. This comet is of interest as it has been noted to flare dramatically. In 1973 the flare was 10 magnitudes brighter than predicted, reaching easy naked-eye visibility at apparent magnitude 4.[7] However, by June 22, the comet had diminished to about magnitude 11, having produced no flare of note.

Clients are required to offer their drawings and technical requirements, which will be transferred to the technical department (heat treatment center, large forgings research center, mechanical research center, and welding departments, etc.) for confirmation and accounting. Then we will give clients the quotation. The ordered products will be put into production as soon as possible after clients have placed an order. For any problems raised in the production line, we will contact and communicate with our clients directly.

Nk 1616flight status

Quality Control 1. In the smelting process, to ensure the high purity and low gas content of raw materials, apart from the required chemical elements, we have strict control upon some harmful elements such as P, S, Pb, Sn, As, Sb, and Bi, as well as some gas or non-metallic debris like H, O, and N. 2. Strict forging technique is employed both to ensure there are no flows inner the products, and to keep the main shaft's microstructure consistent with the overall shape of forgings. The comprehensive processing lines commit that the spare parts are of good mechanical properties and long service life. 3. Products will acquire high comprehensive mechanical properties after quenching and high-temperature tempering treatment. The impact performance is high whether for 42CrMo main shaft of room temperature, or low-temperature 34CrNiMo6 main shaft.4. We employ CNC equipment for finishing to ensure the high processing accuracy of our forgings. The advanced painting and coating technique for corrosion resistance will meet the requirements of long-term field work.

Nk 1616status

41P/Tuttle–Giacobini–Kresák is a periodic comet in the Solar System. The comet nucleus is estimated to be 1.4 kilometers in diameter.[6]

The comet was not observed during the 2011 unfavorable apparition[4] since the perihelion passage occurred when the comet was on the far side of the Sun.