A unique feature of the newest Shinkansen bullet train model, N700, is its installation with electromagnetic-valve devices for controlling the leaning of railroad vehicles. A Shinkansen train fitted with this device can maintain its maximum speed of 270 km/h on curved sections of track.
Under this system, pre-recorded railway data are transmitted to a system for controlling car leaning, installed in each train car. Based on the data provided, compressed air is supplied into air springs installed in each car causing the car to lean and enabling the train to travel at a higher speed on curved sections. The device is designed to control a flow of compressed air that is supplied into air springs which play a role in the leaning of the car. This device can shave 5 minutes off the Shinkansen’s travel time between Tokyo and Shin-Osaka. With this device, the number of engine revolutions needed for accelerating or decelerating is reduced, leading to energy conservation. The Shinkansen’s cutting-edge technology is supported by Nabtesco.
Nabtesco's flight control actuation system has been adopted by Boeing aircraft used worldwide (Boeing-737, 747, 757, 767, 777). This system controls units which play very important roles in aircraft flight. Among such units are an aileron, which controls the leaning of fuselage; an elevator, which adjusts flight altitude; a spoiler, which has a braking function; and a device for controlling takeoff and landing. The flight control actuation system, housed inside the aircraft body, is not visible from the outside. Its existence only becomes apparent through the functioning of these units, such as when a spoiler is moved during takeoff or landing.
Boeing's next-generation B747-8 jumbo jet, whose inaugural flight is set for 2009, is scheduled to adopt this system. Thus, the system is expected to become more widely used in the future.
A platform screen door is installed between the station platform and the railway line, and ensures passenger safety by preventing them from falling onto the railway line. This door system is also useful in improving the air-conditioning efficiency of the platform area, and increasing passenger comfort.
The driving unit of Nabtesco's platform screen door has an electrically driven engine. The opening and closing of the platform screen doors are synchronized with those of the train doors when the train arrives or departs, thereby increasing passenger safety. Nabtesco’s platform screen doors have been adopted by many railway operators both at home and abroad: Tokyo Waterfront New Transit Yurikamome, Tokyo Metro’s Nanboku Line and Tokyo Tama Intercity Monorail in Japan; as well as Tseung Kwan O Line of Hong Kong’s Mass Transit Railway (MTR), KCRC West Rail of Hong Kong, Incheon International Airport Railroad of South Korea and China’s Tianjin Metro overseas.
Precision reduction gears are mainly used in joints of industrial robots (playback robots), and machine tools such as automatic tool changers. The gears can generate large torque with small force by reducing the number of motor revolutions to the minimum levels necessary. The gears are designed to achieve high positioning accuracy.
Nabtesco's precision reduction gears are compact and lightweight, but have outstanding rigidity and overload resistance. As the gears Ebacklash, vibration from motor revolutions, and inertia moments are small, the products have highly efficient features and are superior in various aspects, including excellent accelerating capabilities, smooth motion, and high positioning accuracy. They are used in a wide range of equipment and devices, from industrial robots, machine tools and semiconductors, to LCD production equipments and ordinary industrial machines.
A control valve is a device designed to control hydraulic pressure. Technology for moving machines and other equipment by controlling hydraulic pressure has been applied to various industrial machines.
Nabtesco had an early start in developing control valves for mini excavators and agricultural machines, and has now secured its status as the leading control-valve manufacturer. New efforts currently being made by the company in the field of control valves include the development of valves for use in wheel Loaders, a new segment in the construction machinery market, by applying core circuit-designing technology.
*A wheel loader is a machine used in civil engineering work. It is designed to scoop or lift soil or snow and unload it onto dump trucks or similar vehicles, through the movement of a bucket installed on the front and an arm employing a hydraulic cylinder.
Braking systems and suspension systems of trucks are controlled by taking advantage of compressed air pressure generated inside a compressor, which is directly connected to an engine. An air drier is designed to increase the safety and durability of these systems by removing oil ingredients and moisture from the compressed air. All air brake trucks manufactured in Japan are installed with air driers, and Nabtesco commands a high share of the domestic market for the product.
The next time you are driving and a truck stops just to your left at a traffic light, why not try to spot the air drier installed? But always be careful when doing so!
The engine output of large-scale vessels such as tankers is huge, rendering engine control very difficult.
Nabtesco provides a system that can remotely control the engines of large-sized vessels from the bridge, and the system has received high appraisal.
In the light of worldwide moves to emphasize environmental conservation, emissions of NOx from vessel engines are expected to become subject to environmental regulations. In order to clear such NOx regulations, an increasing number of electronically controlled engines (cam-free engines) are being adopted for vessels. Electronically controlled engines enable optimal engine-motion control in all engine-speed ranges, a feature which is impossible under conventional engines controlled by cam mechanisms.
Electronic control of ship engines will lead to reductions in NOx emissions and improvement in fuel efficiency, thus enhancing the overall maneuverability of vessels, including improved mobility and quicker response to engine-speed changes.
Nabtesco provides a device for controlling electronically controlled engines, which is designed to send optimal instructions for the control of such engines to maximize their capability after receiving signals from a ship-steering device. The company also provides a high-speed, high-oil pressure electromagnetic valve, which is designed to enable optimal fuel injection and exhaustion, upon receiving instructions from the above-mentioned device.
Did you know that it is claimed that, at the current pace of consumption, oil resources will be depleted within 40 years? The expected depletion of such resources, and the issue of global warming, have become serious problems for humanity, prompting moves to develop clean, renewable energy. As a result, solar, wind, and geothermal power generation are being put to practical use. Among these alternative energy resources, wind power generation has been spreading rapidly, particularly in Europe, and has drawn strong attention in Japan given its strong environmental consciousness.
Nabtesco has provided windmill makers with yaw drives for wind turbines, which changes the direction of the windmill sails in response to change in wind direction, and pitch drives, which adjust the angle of the windmill blades in response to wind power. These drives for wind direction are lightweight, have superior durability, and a lifespan of 20 years.
Hydraulic excavators play a major role in construction sites. A traveling unit for hydraulic excavators compactly houses systems relating to the excavator’s traveling capability―a reduction gear, a hydraulic motor, a valve and a parking brake. Nabtesco supplies a wide range of traveling-unit series, for use with all sizes of excavator, from small to large.
In response to the needs and demands of customers, the company has also developed traveling units that feature stronger traveling power, able to contribute to energy conservation in construction-machinery engines.