Maintenance Method of Gas Spring for Shangchai Generator Set

Gas springs mainly play a supporting role. They only have two positions, the shortest and the longest, and cannot stop on their own during the stroke. They are widely used in industries such as automobiles, textile machinery, printing equipment, office equipment, engineering machinery, and generators. For large and complex generator equipment, although the gas spring is just a small component, it plays a relatively important role. During long - term use, various faults are inevitable. The Dingbo Power Diesel Generator Knowledge Mini - Course shares two repair methods for generator gas springs to help you easily use and maintain the generator set.

Generator gas springs with weakened elasticity or shortened free length can be repaired using appropriate methods. There are two commonly used methods for repairing generator gas springs: the cold - working method and the heat - treatment method.

Cold - working Method

Put the spring on a circular shaft (the outer diameter of the circular shaft should match the inner diameter of the spring). Then, clamp one end of the spring together with the circular shaft in the chuck of the machine tool. Fix a moving rod on the tool post of the machine tool. File a groove slightly larger than the diameter of the spring wire at the head of the moving rod, and embed the spring into the groove. Press it tightly with the tool post. Slowly rotate the spring while rotating the chuck. For each rotation, the moving distance of the moving rod should be 1 - 2mm larger than the spring pitch. Continuously tap the spring gently with a small hammer to harden the metal surface of the spring, thereby increasing its elasticity. The service life of the spring repaired by this method is relatively short. Therefore, this method should only be used when there is no other choice. Generally, it is better to replace it with a new spring.

Heat - treatment Method

Place the generator gas spring in a thick iron sheet box filled with cast - iron filings around (the cast - iron filings can prevent the spring surface from oxidation). Heat it in the furnace to about 925°C and keep it warm for about 1 hour. Then, take out the iron sheet box and cool it in the air. After that, take out the generator gas spring and put it on the mandrel of the repair fixture. Install the mandrel together with the fixture into the frame of the fixture. The frame is made of 6 - mm - thick cast - iron plates and is cut into slots according to the pitch of the new gas spring. Press the mandrel with the valve spring into the slots. Then, heat the generator gas spring together with the fixture to about 810°C, and then quench it in oil. Heat it to 310°C again and cool it in the air. At this time, the hardness should be RC41 - 42.

Dingbo Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to [email protected] we will pay highly attention on your question.