Ignition cable contact pin type connecting structure

Abstract

The invention belongs to the field of aero-engine ignition nozzle design, and relates to an ignition cable contact pin type connecting structure, which comprises: a core rod (3), which is equipped with a conical head (31), wherein a first clamping groove (32) and a second clamping groove (33) are formed in the positions, close to a conical head (31), of the core rod (3); an insulating bush (4), which is arranged outside the core rod (3) in a sleeving mode in the axial direction, and is provided with a corresponding annular groove (41) in the axial position, provided with the clamping groove, of the core rod (3); a first check ring (1), which is accommodated in the first clamping groove (32) in a matched mode; a second check ring (2), which is accommodated in the second clamping groove (33) in a matched mode. The ignition cable contact pin type connecting structure solves the problems of part falling and core wire breakage faults caused by large displacement of similar cable conductors, can greatly improve the reliability of the ignition cable contact pin type structure, and has good economic benefits and social benefits.

Description

technical field [0001] The application belongs to the design field of ignition nozzles of aero-engines, and in particular relates to a pin-type connection structure of an ignition cable. Background technique [0002] The existing pin structure at the connection end of the aviation ignition cable is mainly composed of a core rod, a retaining ring and an insulating bushing, and the pin-type structure is to fasten the core rod and the insulating bushing through the front retaining ring. The principle is as follows: the front end of the insulating bushing of the ignition cable is an open slot opening, and the outer diameter of the core rod is smaller than the inner diameter of the insulating bushing. The head of the mandrel has a 45-plated cone angle, and a slot is designed behind the cone angle. The retaining ring has a certain degree of elasticity. The retaining ring is squeezed onto the mandrel slot along the cone angle of the mandrel head through the sleeve tooling. The dia...

AI Technical Summary

Problems solved by technology

[0003] Since the head of the ignition cable pin structure insulation bushing is an open opening, such as figure 1 As shown, when the movement of the cable wire is large, on the one hand, the head of the ignition cable mandrel will be pushed out, and the insulating bushing at the connection cannot be fastened reliably, resulting in a loose connection structure. In severe cases, the retaining ring will fall off, causing ignition. The cable is decomposed; on the other hand, the amount of wire movement is large, and the stress will be concentrated on the connection between the core rod and the wire when it is installed at the connection between the ignition cable joint and the ignition device, resulting in the breakage of the wire core wire at the connection, resulting in failure of the ignition cable

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