Abstract
The airports construction level is improved and the construction scale is constantly expanded with the rapid development of society, economy and science and technology, which brings a good development prospect for aircraft towing tractors. On the basis of summarizing the current research and application of aircraft towing tractors, the traction characteristics of towbar and towbarless aircraft tractors were analyzed, and the mechanical, electric, hydrodynamic and hydraulic transmission automatic control system were compared. The composition, working principle and application of hydraulic steering control system, hydraulic braking control system, hydraulic clamping and lifting mechanism and hydraulic hybrid power system of aircraft towing tractors were emphatically discussed. The results show that the configuration of towbarless traction is flexible and the traction capability is strong. Hydraulically controlled aircraft towing tractor has good traction, braking and control characteristics. Electronic hydraulic braking system is precisely controllable, and the hydraulic hybrid technology is beneficial to reduce the energy consumption of aircraft towing tractors. The demand for aircraft towing tractors is increasing with the expansion of the airport distribution and construction, on the basis of constantly improving the existing aircraft towing tractor and according to the needs of airport operation, it is necessary to adopt innovative technology to develop energy-saving, environment-friendly and intelligent aircraft towing tractors, so as to adapt the development needs of aviation industry.
Highlights
Aircraft towing tractor is a kind of special airfield ground vehicle used for pulling or pushing aircrafts
Hydraulic transmission is main used in the aircraft towing tractors [1,2,3], it is connected by flexible pipe, it has flexible structure and a wider range of stepless speed regulation, better dynamic braking characteristics, superior to the ability of overload protection and a continuous transformation output [4,5]
The main transmission modes of aircraft towing tractor were compared and analyzed, and on this basis, hydraulic steering control system, hydraulic braking control system, hydraulic clamping lifting mechanism and hydraulic hybrid power control system of aircraft towing tractor were discussed in detail
Summary
Aircraft towing tractor is a kind of special airfield ground vehicle used for pulling or pushing aircrafts. The mechanical transmission was used in early aircraft towing tractors, but it has been rarely used because of its poor flexibility and other shortcomings. Electric power transmission is mainly used in small and medium-sized aircraft towing tractors due to the influence of transmission power and the battery life. Some Chinese enterprises in Beijing, Qingdao, shenzhen, shenyang, weihai and other places can produce small and medium-sized aircraft towing tractors. The main transmission modes of aircraft towing tractor were compared and analyzed, and on this basis, hydraulic steering control system, hydraulic braking control system, hydraulic clamping lifting mechanism and hydraulic hybrid power control system of aircraft towing tractor were discussed in detail. The relationship between the aircraft towing tractor and the aircraft is shown in figure 1
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