What inspections need to be carried out for mechanical sealing materials for high temperature hot water pumps

Mechanical sealing materials for high temperature hot water pumps are brittle at very low temperatures, and will deform at high temperatures, and certain materials can withstand the corrosion of certain media at room temperature. However, it is not necessarily resistant to the corrosion of the medium at high temperature, so the material properties should meet the requirements of the temperature of the medium being transported. For parts with relative motion, such as shaft and shaft sleeve, bolt and nut, impeller sealing ring and pump body sealing ring, etc., the hardness of the two parts should be slightly different when selecting materials, otherwise they will easily bite each other during loading and unloading and operation. or scratches.u200b
The stationary ring assembly should be installed into the gland using a press or drill press, and under no circumstances should the mechanical seal parts or components be impacted. The pressed surface should be padded with clean paper or cloth to avoid damage to the sealing end. After assembling the moving ring or static ring assembly, press the compensation ring by hand to check whether it is installed in place and whether it is flexible; elastic split ring (some mechanical seals Check whether the axial positioning of the compensation ring by the elastic split ring is reliable, check whether the verticality between the mechanical seal end of the high-temperature hot water pump and the center line of the shaft (or shaft sleeve) meets the requirements, and the anti-rotation pin lead of the static ring assembly must be Accurately, when advancing the static ring component, the pin groove of the component should be aligned with the pin. After advancing in place, measure the distance from the end face of the component to a certain end of the sealing cavity to judge whether it is installed in place. Symmetrical, careful, and tighten in several times, not at one time, so as not to skew or even crush the static ring.
After the sealing ring is installed on the moving ring assembly or the static ring assembly, it should be arranged in a reasonable manner, and it should not be twisted, so that the burrs are in the cross section of the free state. It can still be used for O-rings with slightly thick burrs. However, attention should be paid to the position of the burrs. When advancing the assembly, one side of the O-ring seal slides relative to the sealed part (gland or sealing cavity), and the burrs on the side should be behind the sliding direction, otherwise, the burrs will turn up and be in the seal. In terms of position, it will affect the sealing effect. When advancing the assembly, it is necessary to prevent the damage of the O-ring seal. The main damage forms include falling blocks, cracks, bumps, curling and twisting. Adjust the compression amount of the mechanical seal according to the technical requirements.