Permanent-magnet type airplane wheel speed sensor
A speed sensor, permanent magnet technology, applied in the direction of linear/angular velocity measurement, velocity/acceleration/impact measurement, instruments, etc., can solve the problems of single-point failure braking efficiency, complex structure and difficult processing, low measurement accuracy, etc., to achieve output Stable and reliable characteristics, compact structure, good output characteristics
Active Publication Date: 2013-06-26
XIAN AVIATION BRAKE TECH
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Problems solved by technology
[0004] In order to overcome the problems existing in the prior art that the structure is complex and difficult to process, the dynamic response is low, the measurement accuracy is low, the product has no margin, single point failure is easy to occur, and the braking efficiency is low, the present invention proposes a permanent magnet wheel speed sensor
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Embodiment Construction
[0020] This embodiment is a wheel speed sensor used in a certain system.
[0021] This embodiment includes an end cover 1, a dustproof ring 2, a magnetic steel seat 4, a retaining ring 5, a rotor assembly 6, a thin bearing 7, a ball bearing 8, a spring washer 9, a lever 10, a nut 11, a key 12, and a gasket 13. Stator 14, permanent magnet alloy 15, coil assembly 16, housing 17, sealing ring 18 and electrical connector 19.
[0022] The housing 17 is the carrier of this embodiment. The bottom of the large inner diameter hole of the housing 17 where the stator 14 is installed. The runner 21 of the rotor assembly 6 is installed in the inner hole of the stator 14; the rotating shaft 22 of the rotor assembly 6 is installed in the shaft hole at one end of the housing 17 through the thin bearing 7 and the ball bearing 8; another side. The magnetic steel seat 4 is installed in the housing 17 and is located on one side of the stator 14 . The coil assembly 16 is located in the inner h...
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The invention discloses a permanent-magnet type airplane wheel speed sensor. A stator and a rotor assembly are mounted in an inner hole of the stator; a rotation shaft of the rotor assembly is mounted in a shaft hole at one end of a shell through a thin bearing and a ball bearing; a magnetic steel seat is mounted in the shell; a coil assembly is located in an inner hole of the magnetic steel seat; and a permanent-magnetic alloy is mounted in an inner hole of the coil assembly. The tooth number of a turning wheel is the same as that of the stator; and a clearance exists between the tooth crestsurface of the stator and the tooth crest surface of the turning wheel. In the initial position on which the stator and the turning wheel are matched with each other, the tooth crest of the stator isopposite to the tooth crest of the turning wheel; and when the turning wheel rotates, the magnetic clearance between the stator and the turning wheel forms alternate convex and concave changes along with the change of the relative positions of the stator and the turning wheel. The permanent-magnet type airplane wheel speed sensor disclosed by the invention does not need external power, realizes flexible control and fast response, and is convenient for the airplane to acquire and process the speed signal so that the pilot can conveniently operate the airplane; and the permanent-magnet type airplane wheel speed sensor is directly mounted in the end cover of the airplane wheel, and any modification of the airplane wheel is not required. The permanent-magnet type airplane wheel speed sensor disclosed by the invention has a compact structure and low manufacturing cost, and is convenient to dismantle and simple to maintain.
Description
technical field [0001] The invention relates to the field of aircraft anti-skid braking systems, in particular to a permanent magnet wheel speed sensor. Background technique [0002] As the research and application of electronic anti-skid braking system technology becomes more and more mature, almost all aircrafts are equipped with this system at present. The proportional frequency signal is sent to the controller, and the controller decides whether anti-skid braking is required according to the signal frequency. It can be seen that the quality of the wheel speed sensor and the measurement accuracy have a great influence on the normal operation of the braking system. Significant influence. [0003] The speed sensor of the traditional brake system is generally an inertial sensor. The sensor is composed of a flywheel, a ball, a bush, a coil spring, a push rod and a rocker arm, a pull rod, an oil inlet needle valve and an oil discharge needle valve. Anti-slip, the above-menti...
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IPC IPC(8): G01P3/488
Inventor 何学工马晓军王蕾刘莉闵丽
Owner XIAN AVIATION BRAKE TECH