A kind of preparation method of gyro motor indicator belt

Abstract

The invention provides a preparation method of an indication strip of a gyro motor. Firstly, a black zinc layer is electroplated on the whole outer surface of the rim of a rotor of the gyro motor; then an electrical-insulation plastic tape is cut to be identical with the indication strip in shape and size and pasted at a part, wherein the indication strip is required to be prepared, of the rotor; the rim of the motor is immersed in an acid solution to remove the excess black zinc layer; and finally the protective tape is removed and the surface of the rim of the rotor is cleaned. According to the preparation method, the labor intensity of operators can be relieved, the cost can be reduced, and meanwhile, the manufacturing quality of the indication strip is improved, so that the product reliability is improved. The preparation method is applicable to various precise motors with the performance tested by indication strips.

Description

technical field [0001] The invention belongs to the technical field of gyro motors, and in particular relates to a preparation method of a gyro motor indicating tape. Background technique [0002] The gyroscope is an important navigation instrument and control element on the aircraft. Its general structure consists of a gyro motor enclosed in a housing, an inner ring and an outer ring. In order to ensure the good performance of the gyro, the angular momentum of the gyro motor is required to be as large as possible, so the rotor of the gyro motor is placed outside the stator (this is different from the common motor). In the manufacturing process of the gyro motor, in order to test the performance indicators such as the beating and balance of the motor at a certain speed, it is necessary to manufacture a black indicator band on the outer surface of the gyro motor rotor rim to test its speed. Due to the high speed of the gyro motor (can be greater than 60,000 rpm), it is requi...

AI Technical Summary

Problems solved by technology

At present, there are two methods commonly used at home and abroad. One is to spray black paint on the overall protection part. This method has the following defects: 1. It is necessary to manufacture a special protection fixture. The black indicator band has a certain width and length, but it is only the For a small part, other parts need to be protected during painting, so it is necessary to manufacture a special fixture, which virtually increases the manufacturing cost; 2. The construction operation is complicated. When painting, first set the fixture on the wheel rim, and then put it on after the painting is completed. When it is removed, since the paint is not cured, it is easy to take off the paint layer on the indicator tape during the process of taking the fixture, resulting in a change in the size of the indicator tape; 3. The thickness of the paint layer is large (generally 20-30 μm), and it is uneven. It is easy to generate local resistance under high-speed rotation, causing the motor to emit noise or shake; 4. The adhesion is poor. During use, due to the volatilization of the solvent in the paint, the weight of the indicator belt changes, which affects the balance of the gyro motor. , the performance index changes

The second is overall protection and partial black nickel plating. This method has the following defects: 1. The overall protection is very difficult. Due to the complex shape and large area of ​​the rim of the gyro motor, it is difficult to use paint or protective glue, and there are often some air holes or holes in the protective layer. Pinhole, the surface of the rim corrodes after the solution penetrates in the electroplating process, and defects such as pinholes or hemp pits appear; 2. It is necessary to manufacture special fixtures. When painting, it is necessary to leave the part of the indicator belt, and at the same time protect other parts with paint, so It is necessary to manufacture a special fixture, which virtually increases the manufacturing cost; 3. The construction operation is difficult. After the overall painting or gluing is completed, a special fixture needs to be installed, and the paint layer or glue layer on the indicator belt is removed with a knife. There are local residues in the paint layer or glue layer, and the edge of the electroplated indicator band is not neat; 4. The corrosion resistance is poor. The process of plating black nickel layer is generally to use galvanized layer as a primer first, and then black nickel plating (thickness is only 0.1μm) , Discoloration, blooming, white rust, poor adhesion and other problems often occur during use; 5. The environment is highly polluted. Because the electroplating black nickel bath contains nickel salt heavy metal ions, water treatment is difficult and the environment is polluted