First, the centrifugal pump head, pump housing and guide vane wheel 1, clean and check all levels of impeller, there should be no wear, cracks, erosion and other defects. 2, Centrifugal pump impeller anti-rotation should be no bending, broken and loose. Pump head, pump housing seal ring surface should be no pitting, scratches, grooves, the maximum allowable surface roughness Ra of 0.8μm, seal ring and pump head, centrifugal pump casing assembly clearance of 0.05 ~ 0.10mm, seal Ring should not be loose. 3, Centrifugal oil pump head, centrifugal pump pump housing only as a benchmark, measure the ring radial bore circle beating, the value of not more than 0.50 mm, the end of the round beating should not exceed 0.04 mm. 4, measuring the amount of the gap between the pump head, pump housing seal ring and its assembly seal ring, the value should be between 0.50 ~ 0.60 mm. Centrifugal pump impeller, clean and check the impeller surface at all levels, the impeller surface should be free of cracks, wear and other defects, impeller flow channel surface should be smooth, and no scaling, burrs, leaves should be no cracks, scouring thinning and other defects. 2. Inspect the impeller inlet and outlet seal rings at all levels without loosening. The surface of the seal ring is smooth and burr-free. The maximum allowable value of the surface roughness Ra is 0.8μm and the clearance between the impeller and the impeller should be 0.05 ~ 0.10mm. Impeller hole as a benchmark, check the impeller radial runout should not exceed 0.05 mm. End runout is not greater than 0.04 mm. 3, Impeller and shaft with interference fit, generally H7 / h6. Key and keyway interference with the amount of 0.09 ~ 0.12 mm, after assembly, centrifugal pump key top of the gap is 0.04 ~ 0.07 mm. 4, Impeller for static balance. Third, the centrifugal pump throttle seal 1, clean and check the throttle seal surface, there should be no cracks, partial wear and other defects, the maximum allowable surface roughness Ra 0.8μm; 2, centrifugal pump throttle seal H7 / p6 with the pump body. Take the outer circle as a reference and measure the radial runout of the inner bore. The value should not be more than 0.02mm. 3. Measure the clearance between the shaft seal and the pump shaft of the centrifugal oil pump. The value should be between 0.25 and 0.30 mm. Fourth, centrifugal pump shaft, cleaning and inspection of the pump shaft, the pump shaft should be free of cracks, serious wear and tear and other defects. If there is wear, cracks, erosion, etc., should be detailed records, and analyze the reasons. 2, testing centrifugal pump shaft straightness, the value should not be greater than 0.05mm in length. Journal surface shall not have pits, grooves and other defects, the maximum allowable surface roughness of 0.8μm, spindle circularity and cylindricity error should be less than 0.02mm. 3, Centrifugal pump keyway centerline axis parallel to the center line error should be less than 0.03mm / 100.
Wiper Seals
Wiper Seals are a type of mechanical seal commonly used to protect piston rods and pistons in hydraulic and pneumatic equipment. The main function of Wiper Seals is to prevent dust, dirt, and other impurities from entering the interior of the equipment, thereby protecting the sealing performance of the piston rod and piston, and extending the service life of the equipment.
Wiper Seals are typically made of elastic materials such as polyurethane, nitrile rubber, fluororubber, etc. These materials have excellent wear resistance and chemical resistance, and can maintain stable performance in various harsh environments.
Wiper Seals are typically divided into two types: unidirectional and bidirectional. Unidirectional Wiper Seals can only prevent dirt and impurities from entering the device from one direction, while bidirectional Wiper Seals can simultaneously prevent dirt and impurities from entering the device from both directions.
Wiper Seals can also be customized according to different application requirements. For example, for high-speed rotating devices, special Wiper Seals can be used to ensure that they do not generate excessive heat and friction during high-speed rotation. For equipment used in harsh environments, special materials such as corrosion-resistant, high-temperature resistant, and low-temperature resistant Wiper Seals can be used.
In summary, Wiper Seals are in dispensable mechanical seals in hydraulic and pneumatic equipment, and their excellent performance and reliable sealing performance provide important guarantees for the normal operation of the equipment. If you need a Wiper Seals product, you can contact a professional seal manufacturer to customize the appropriate Wiper Seals for your device according to your specific needs.
Wiper Ring,Hydraulic Wiper Seal,Double Lipped Wipers,Dust Seals
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