In electrical slip ring is in the working process, its main parameters and working stability, reliability and life have a great relationship, sometimes will have a big impact. Then briefly describe the electrical slip ring in the industry standard in some very important parameters, and to understand its detection method, for detecting process of the emergence of some unqualified data were analyzed in detail, and investigate its causes are analyzed, and the corresponding treatment measures.

What is the precise electrical slip ring ? Precision electrical slip ring assembly is to realize the two relatively rotating mechanism between electric double precision transmission device. In general, precision electrical slip ring assembly consists of several components: the slip ring, brush component, combined bracket, a radial ball bearing, bearing cover etc.. The slip ring body surface is plated with multi-layer metal. In order to reduce resistance, brush with precious metal alloy wire brush wire processing, mainly depends on the elastic stress and the annular groove of the sliding contact, to a specific pressure to ensure reliable transmission of electrical signals. Precision electrical slip ring assembly and reliable use, low distortion, stable performance, with high precision, compact structure, loop multiple low noise, long service life and convenient installation, thus suitable for a variety of geographical features. Products are widely used in the sea, land, air, sky field of rotating equipment, and other civil and industrial equipment, such as industrial automation equipment, precision turntable, the revolving door, and entertainment facilities.

Parameter detection of the conductive ring parameter detection can better reflect the performance of conductive slip ring, discover in time and solve problems. Detection of parameters including the size, static contact resistance, contact resistance, insulation resistance, the dielectric strength and friction torque, protection level, in this paper, the dynamic contact resistance and insulation resistance testing and analysis

Slip ring is an electrical precision parts, one is the reliability; second is the security, therefore to analyze two important technical parameters for dynamic contact resistance and loop the insulation resistance. The former logo on product performance reliability, the latter is safety, of course, a qualified products, especially in high-end technology to solve the level, there will be more technical parameters can be realized, such as high voltage, high speed solution solution, large current solutions, anti-jamming and so on, each one options below will be a product reliability technology embodied, the following two main technical parameters of the detection method is explained in detail.

How to detect the dynamic contact resistance?

Dynamic contact resistance for slip ring, by the influence of continuous rotation caused by the contact resistance value fluctuation. Detection method is as follows: the measured slip ring installed on the test turntable, through balanced strength to drive the rotary table, the slip ring in the continuous rotating situation, using micro Europe microvolt meter to detect and record the loop dynamic contact resistance of the maximum value and the minimum value, the difference of dynamic resistance of critical data. Shall not be greater than 10m, our use of precious metal alloy contact material, typical data in1m . Industry has been the forefront of similar products. The technical evaluation we summed up many aspects of the resulting in excessive contact resistance factors and factors associated with, and have perfect solutions, so that products in various application fields to provide reliable, can optimize the system and improve the performance of conductive slip ring.

How to detect the insulation resistance?

The insulation resistance is at a certain voltage, the loop between the insulation resistance. Available for about 500 V megohmmeter test, the method is as follows: in which the measured loop ring lead as a detection end, the remaining parallel ring lead as a detection end, with about 500 V megohm meter can measure the resistance value. It detects the current value of insulation resistance. DC high voltage generating generally has three kinds of methods. The first hand generator type. At present our country production megohm meter is about 80% using this method (shaking table name sources). The second is through the electric transformer, rectifier by DC high voltage. General electric type megohmmeter method. Third is the use of a transistor oscillating type or special pulse width modulation circuit to generate a DC high voltage, battery type and electric type insulation resistance meter method.