On-site inspection of the cause of wear and scratch of related equipment
The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and does linear reciprocating motion (or oscillating motion). It has a simple structure and works reliably. When it is used to realize reciprocating motion, it can avoid the deceleration device, and there is no transmission clearance, and the movement is stable, so it is widely used in the hydraulic system of various machinery. The output force of the hydraulic cylinder is proportional to the effective area of the piston and the pressure difference between its two sidesThe hydraulic cylinder is basically composed of cylinder barrel and cylinder head, piston and piston rod, sealing device, buffer device and exhaust device. Buffers and exhausts vary depending on the application, but others are essential.
Analysis of field equipment failure phenomena and causes
1. Scratches of the hydraulic cylinder caused by foreign objects entering the cylinder will cause the condition of accepting foreign bodies at all times due to the fact that the oil port is not open when storage. There are parts there"Burrs", or inadequate scrubbing. There are often burrs left by drilling in the oil port or buffer device on the cylinder head.
2. The friction iron powder or iron filings caused by the friction iron powder or iron filings caused by the foreign body generated during operation caused by the friction plunger caused by the friction plunger. The mating gap of the buffer device is very small, and when the lateral load on the piston rod is large, it may cause sintering. These friction iron powders or metal fragments that have fallen off due to sintering remain in the cylinder.
3. Errors in operation and other reasons.
On-site repair of hydraulic column failures
Fushilan polymer composite repair technology is the use of polymer composite materials with the strength and hardness required by metal, and has the concession (variable relationship) that metal does not have to achieve the best repair, in the repair will not produce high temperature, it is good to wait for the material to cure, after the material is cured, use sandpaper and oil stone for surface grinding, and use the model ruler to measure, until the size is suitable. The hydraulic cylinder column of the composite material repair plate has high repair efficiency, which can realize the best repair, and the comprehensive repair cost is large, which provides a powerful solution for the maintenance of enterprise equipment and greatly reduces the production cost of the enterprise.
On-site restoration construction process.
l Baking oil: Bake the surface to be repaired with oxygen-acetylene flame to completely remove the oil stain on the surface and infiltrate into the matrix tissue.
l Grinding;The scratched area is polished with an angle grinder to deepen the scratch depth to reach more than 1mm, and the two ends are deepened by drilling with an electric drill to change the force.
l Cleaning: Thoroughly clean the sanded surface with absolute ethanol to ensure that the surface to be repaired is clean, dry and firm.
l Blending materials: blending polymer composite materials 2211 in strict accordance with the mixing ratio required by the materials, and blending evenly until there is no color difference.
l Coated material: Coated material polymer composite material, so that the thickness of the material is greater than the diameter of the plunger.
l Wait for the material to solidify, use sandpaper and oil stone to grind the surface after the material is cured, and measure it with a sample ruler until the size is suitable.
An example of an engineer repairing a hydraulic column scratch in the field