1. Repair of the Drive Shaft and Bushing After Wear When the gear pump's drive shaft and bushing experience wear, the clearance between them increases, which can affect the oil delivery capacity of the pump. To restore proper fit, either the drive shaft or the bushing can be repaired. If the drive shaft is slightly worn, you can remove the old bushing and replace it with a standard-sized one to bring the clearance back within acceptable limits. However, if both components are severely worn and the clearance is significantly out of specification, the bushing should be replaced. The drive shaft can then be chrome-plated or vibratory welded to increase its diameter, followed by grinding to the correct size, ensuring proper alignment and fit. 2. Repair of Cracks in the Pump Housing To fix cracks in the pump housing, a 508 nickel-copper welding rod can be used for casting. The weld must be tight without any air holes, and the flatness error of the mating surface with the pump cover should not exceed 0.05 mm. This ensures that the housing remains structurally sound and maintains proper sealing when reassembled. 3. Repair of Wear on the Drive Shaft Bushing Hole and Driven Shaft Hole If the drive shaft bushing hole becomes worn, the wear marks can be removed by reaming, and the bushing can then be enlarged to match the new size. Similarly, for the driven shaft hole, reaming is used to eliminate wear marks, after which the driven shaft is machined to fit the newly reamed hole precisely. 4. Repair of the Inner Cavity of the Pump Casing When the inner cavity of the pump casing wears, it is typically repaired using an insert method. This involves enlarging the cavity and then casting a cast iron or steel sleeve inside. Once the sleeve is in place, the inner cavity can be honed, and the valve seat can be restored. For pressure-limiting valves, there are two types: spherical and plunger. If the spherical seat is worn, a steel ball can be placed on the seat and gently tapped with a metal rod until the ball fits tightly against the seat. If the seat is severely damaged, it can first be reamed to remove the wear, and then the same process can be repeated. For a plunger-type seat, a small amount of valve sand can be used for grinding until the seal becomes tight. 5. Repair of the Pump Cover For the working surface of the pump cover, if the wear is minimal, manual grinding can be used. A small amount of valve sand is placed on a flat surface or thick glass plate, and the pump cover is then ground on it until the wear marks are removed and the surface is smooth. If the wear exceeds 0.1 mm, the cover should be turned and ground to restore the flatness. This ensures that the pump cover maintains proper contact with other components during operation.
The Anti-static PVC cleanroom backpack tool bag is a bespoke backpack intended for the secure storage and transportation of tools in cleanroom settings, safeguarding them from electrostatic discharge (ESD).
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Constructed from PVC - a robust, water-resistant material - the bag also incorporates additives to neutralize static electricity, lending it anti-static properties. Its backpack design ensures that the bag can be comfortably carried on the back, thereby keeping the hands free for work-related tasks.
This bag is perfectly suited for scenarios where electrostatic discharge could potentially damage delicate electronic components and other devices. It is also apt for use in cleanroom conditions that require rigorous minimization of contaminants to preserve high cleanliness standards.
The bags come in a variety of sizes to fit different tool dimensions and volumes. They are designed for effortless cleaning and disinfection. Often equipped with multiple pockets and compartments for efficient organization and secure placement of tools, these bags also feature padded shoulder straps and back support to provide comfort during prolonged use.
