Seamless Connection Method of Moving Armature and Moving Armature Column in DC Electromagnetic System
A technology of seamless connection and electromagnetic system, which is applied in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc., and can solve the problem of poor stability of the pull-in or release action of the DC electromagnetic system, magnetic flux leakage, and magnetic resistance of the electromagnetic system, etc. problems, to achieve the effect of miniaturization, simplification of process steps, and improvement of connection accuracy
Active Publication Date: 2020-09-08
NO 13 ELECTRICAL APPLIANCES
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Problems solved by technology
[0005] The purpose of the present invention is to provide a seamless connection method between the moving armature and the moving armature column of the DC electromagnetic system, so as to solve the problems of reluctance and magnetic flux leakage in the electromagnetic system when the existing moving armature and the moving armature column are riveted or welded. The problem of weak stability of the pull-in or release action of the DC electromagnetic system
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[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0020] A method for seamlessly connecting a moving armature and a moving armature column in a DC electromagnetic system, such as figure 1 As shown in the figure, there is an interference fit between the mounting hole in the middle of the movable armature 2 and the movable armature column 1, and the interference fit is 0.08-0.12 mm. A convex platform 6 is provided on one side of the movable armature 2 mounting hole. The DC electromagnetic system The seamless connection method between the movable armature and the movable armature column comprises the following steps:
[0021] Step 1. Put the movable armature column 1 into liquid nitrogen, and the movable armature column 1 shrinks and deforms in both the radial direction and the axial direction;
[0022] Step 2: Assemble the two movable armatures 2 and the coil 4 according to the design requirements, wherein th...
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The invention discloses a seamless connection method of a movable armature and a movable armature post in a DC electromagnetic system, there is interference fit between the mounting hole of the movable armature and the movable armature pillar, A liquid nitrogen freeze-shrinking movable armature column is placed in a mounting hole of that movable armature, clamping the end of the movable armature column with a rotary air compressor, applying pressure to the end of the movable armature while rotating at a high speed, At the same time, hot air is blown to the end of the movable armature column, so that the end of the movable armature column can quickly return to the normal state, and the movable armature column and the inner wall of the movable armature are frictionally welded at high temperature under the action of a rotary air compressor, so that the movable armature column is seamlessly connected with the mounting hole and the boss of the movable armature. The invention utilizes the principle of metal thermal expansion and cold shrinkage to seamlessly connect the two ends of the moving armature column with the moving armature, simplifies the process steps, eliminates the need for riveting / welding, improves the connection precision, stability and reliability of the DC electromagnetic system, and realizes the miniaturization of the DC electromagnetic system.
Description
technical field [0001] The invention relates to the technical field of (low) medium and high voltage electrical equipment, in particular to a seamless connection method for a moving armature and a moving armature column of a DC electromagnetic system. Background technique [0002] With the rapid development of mechanical manufacturing technology, there are more and more products that use the difference in the expansion coefficient of the parts themselves to transmit the pulling force through the friction force generated by the interference fit between the two parts. In order to obtain a reliable and firm connection structure that can carry more frequent and longer-lasting tension, a larger interference is required. However, with the rapid development of modern society, electrical equipment is developing towards miniaturization, the basic size of components is getting smaller and smaller, and the interference amount of interference connection decreases with the reduction of b...
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IPC IPC(8): H01F41/02
CPCH01F41/02
Inventor 高卫东陈明宋玉兰白庆生郇丽张强强蒋伟新胡文晶万永刚
Owner NO 13 ELECTRICAL APPLIANCES