The working principle of the collector ring can be divided into slip ring, motor slip ring, radial slip ring and single-sided slip ring. Slip rings are also known as conductive rings, collector rings, bus rings, conductive slip rings, brushes, slip rings, rotary joints, rotary electric joints, etc. Conductive rings can improve system performance, simplify system structure and avoid rotation. Active joints and sprained wires. The slip ring is used as a sliding contact to induce and introduce current in the commutator or slip ring of the motor. It has good electrical conductivity, thermal conductivity and lubrication performance, and has certain mechanical strength and commutation instinct. flame. Almost all motors use carbon brushes, which are an important part of the motor.

The working principle of the collector ring, the whole slip ring is not only the principle of elastic winding, rolling winding or sealing, but also the unique motion structure and sealing structure design, accurate production adjustment of parts, reasonable material selection, etc., forming a stable and reliable structure rotation Connect the system. According to the working principle of the slip ring, the rotor of the slip ring is a series of silver slip rings, which are tightly sleeved on a rotating shaft. The slip ring is separated from the shaft and the slip ring itself by insulating material. The stator is a series of brushes with compression springs. When measuring, first use a coupling to connect the slip ring with the rotating shaft, so that the rotor of the slip ring can rotate with the shaft, and the stator is fixed and in close contact with the rotor. The strain gage and rotor are then connected together, and the test circuit is connected to the stator, and the brushes and slip rings are pressed against each other to transmit the strain signal.

The slip ring of the slip ring has a simple, strong and low cost structure. The main disadvantage is that the contact resistance of the measuring element is large, and it is unstable during high-speed operation. However, some measures can be taken to reduce the contact resistance in the test, such as increasing the number of brushes, adjusting the contact pressure between the brushes and the slip ring, and correctly selecting the material of the slip ring. When the slip ring is working, the brush and the casing must be in place, and the hardness of the two materials must be the same, otherwise when the hardness of the brush is higher than that of the slip ring casing, that is, the brush material has high hardness, and the slip ring casing material is too soft. Slip rings are often worn down to the width of the brushes. Especially motors running in high temperature environment are more likely to cause excessive wear of brushes or slip rings. Pay special attention to the existence of small sparks, because wear marks often appear when the slip ring is running. If there are small sparks, it is small wear near the brushes, no. When using slip rings, such accidents must be prevented in advance. If such signs appear on large-scale dangerous facilities, controlling them can prevent large-scale safety production accidents in advance. It is also the basis for pre-judgment, pre-analysis and prevention based on a detailed understanding of the basic structure and working principle of the collector ring.