Inhalation of air is a common failure of high temperature gear pump, the following describes the method to exclude inhalation of air this fault:
1.CB-B high-temperature gear pump body and both sides of the pump cover for direct contact with the hard seal, if the contact surface flatness does not meet the requirements, the pump easy to inhale the air in the work; the same pump end The cover and the gland are also in direct contact with each other, and the air is easily invaded. If the gland is made of plastic, the seal can not enter the air due to its damage or deformation due to temperature changes. The way to get rid of this kind of trouble is: when the flatness of the pump body or pump cover can not meet the stipulated requirements, it can be grinded back and forth on the flat plate with the gravure sand in the shape of the glyph, or grinded on the surface grinding machine Flatness does not exceed 5μm, and the need to ensure the verticality of the plane and the hole requirements; for the pump cover and gland at the leak, can be coated with epoxy adhesive sealing.
2. High-temperature gear pump on the shaft generally used to seal the oil seal. If the locking lip spring off, or the oil seal installed, or its lips were injured, aging, will make the back end of the seal often in negative pressure and inhale the air, the general can replace the new seal to be resolved.
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