Wheel speed sensor capable of continuously outputting high voltage and its design method

Abstract

The invention discloses an airplane wheel speed sensor capable of lastingly outputting high voltage and a design method of the airplane wheel speed sensor. According to the airplane wheel speed sensor capable of lastingly outputting high voltage, the diameter of a rotor shaft in fit with the inner diameters of bearings is selectively matched with the inner diameters of the bearings within the range that the tolerance is shown in the specification; the interference values of the bearings and the rotor shaft are 0.001-0.003mm; the inner diameters of the bearings are respectively shown in the specification; the gap delta between outer tooth crown of the rotor and the inner tooth crown of a ring gear is 0.1-0.25mm; the distance between the bearings is 10mm; the tooth width of the rotor is 7.2-7.3mm. Through reasonable control over the gap between the rotor and the ring gear and the distance between the bearings and reasonable control over the fit tolerance, the service life of the airplane wheel speed sensor is prolonged; the use reliability is improved.

Description

technical field [0001] The invention relates to the field of aircraft braking system accessories, in particular to a design method for a wheel speed sensor outputting high voltage under high rotational speed conditions. Background technique [0002] Wheel speed sensors are used in aircraft electric anti-skid braking systems. As early as 1970, foreign countries have used electromagnetic induction wheel speed sensors in aircraft braking systems to convert wheel speed change signals into voltage signals. [0003] The speed range of the existing domestic and foreign wheel speed sensors is: 2000r / min~3000r / min, the required output voltage range is 0.3V~0.6V, and the shaft of the wheel speed sensor and the coaxial installation method of the wheel are adopted. The Boeing aircraft of the United States all use this wheel speed sensor. However, in use, the wheel speed sensor and the wheel are not coaxially installed. In this case, the speed of the wheel speed sensor reaches 18000r / mi...

AI Technical Summary

Problems solved by technology

[0014] 2) In the prior art at home and abroad, when determining the cooperation between the rotor shaft and the bearing of the wheel speed sensor, the selected clearance fit is convenient for assembly and repair, but under the high speed condition of 18000r / min, it is easy to make the rotor shaft rotate The disadvantage of friction with the inner ring of the bearing, and this friction can change the gap between the rotor and the ring gear, so that the output voltage is less than 1V;

[0015] 3) The development of the wheel speed sensor of the existing technology at home and abroad all adopts the output signal of 0.3 ~ 0.6V, even if the above problems exist, it will not affect the use, and it is also easy to assemble and repair, so no technical changes have been made

Images