Constant current overflow pump manufacturer

Constant flow overflow pump

(1) Before installing the oil seal, it is necessary to check whether the outer surface of the main shaft neck of the high-temperature gear pump is too rough, whether there are any scratches, especially whether there are any longer scratches along the axial direction. If the appearance of the shaft neck is too rough, it is easy to damage the oil seal or accelerate the wear of the lip 1:3, which will damage its sealing performance. If the outer surface of the shaft neck of the gear pump is severely damaged by blunt impact due to improper disassembly and assembly, it will cause the oil seal lip to not fit tightly with the outer surface of the shaft neck, resulting in oil leakage. Replace the shaft with a new one for the above two situations. If there are only metal burrs or flying edges on the shaft neck, a file can be used to smooth it out to prevent damage to the oil seal lip when installing the oil seal.

(2) Check for any damage, fissures, or oil corrosion on the lip of the oil seal. If these defects are present, replace the oil seal with a new one.

(3) When installing the skeleton oil seal, special equipment tools should be used to prevent the oil seal lip from being stretched, deformed or scratched. If this tool is not available, the following method can be used to install the device: first, roll a layer of clear hard plastic film (commonly known as glass paper) around the shaft neck and even the shaft head, apply a small amount of engine oil on its surface, insert the oil seal into the shaft head wrapped in plastic film, evenly push the oil seal slowly to the shaft neck, and then extract the plastic film. Attention: Do not install the lip in the wrong direction, it should face towards the inside where the oil is stored, and the side with the trademark and specifications should face towards the outside. Because lip 1:3 can only seal unidirectionally, if the oil seal is reversed, it will inevitably cause oil leakage, weaken or fail the sealing effect. It is necessary to prevent the oil seal from being crooked or to use tools such as hammers and sticks to randomly tap and hit the surface of the oil seal, otherwise it is easy to cause damage to the oil seal.

(4) During the installation process, it is necessary to maintain the cleanliness of the oil seal (especially the lip area) and the shaft neck area, and be careful not to let the oil seal jump out of the tension spring groove from the tension spring. If the self tightening spring becomes loose and its elasticity weakens, a section can be cut off depending on the situation, and the two ends can be reliably connected for continuous use.