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What are the application examples of MC nylon?

2020-12-17 09:23:55
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1、 Application examples

(1) Pulley

The traditional pulleys are mostly made of cast iron or steel casting. Although they have large bearing capacity, they have poor wear resistance and damage the steel rope. In addition, the process of cast steel pulleys is complex, and the actual cost is higher than MC nylon pulleys. The pulleys made of MC nylon have high strength and easy processing.

Compared with "metal pulley" and "MC nylon pulley", MC nylon pulley can reduce the weight of boom and boom head by 70%, improve the production efficiency, enhance the lifting function and the whole machine performance, facilitate maintenance, disassembly and oil-free lubrication.

(2) Gear worm gear

Using MC nylon to make gear, worm gear and other transmission parts can greatly reduce the noise.

Taking 400kg air hammer and concrete mixer as an example, 400kg air hammer (pinion) gear M = 8, z = 19, motor power is 40kW. It was originally made of phenolic based pressing plate and used for about half a year, then MC nylon and iron framework structure were used. After 7 years of use, it was still undamaged. Concrete mixer (small) gear M = 10, z = 20, motor power is 7KW, the original metal gear transmission noise, serious tooth wear, after using MC nylon gear, stable transmission, low noise, service life of more than 10 years.

(3) Slider

In construction machinery, slider is almost an indispensable part,

For example, the sliding block used for the boom support of truck crane has always been made of brass. Now, after using MC nylon sliding block, its service life can be increased by 4-5 times. MC nylon sliding block has a long service life, and it can maintain the lubrication performance for a long time after one-time refueling. At the same time, it also has the advantages of impact resistance, vibration resistance, fatigue resistance, low noise, light weight, easy assembly, wear resistance and so on.

(4) Bearing sleeve, bearing bush and bearing

MC nylon is widely used in construction machinery instead of copper and Babbitt alloy to make all kinds of large and small bearing sleeves and bushes.

characteristic:

It has good wear resistance and self-lubricating performance, and has high PV value in the current general thermoplastics; it has small friction coefficient, impact resistance, not easy to hold the shaft, fusion, and does not damage the journal; it has long lubrication cycle, less maintenance, strong adaptability in harsh environment, and long service life. For example, the tension rope balance axle sleeve of WK-10 excavator, with the size of 200 × 160 × 160, has always been made of zqa19-4 material. Because of the great dust and bad lubrication conditions, the axle sleeve is worn quickly. After using MC nylon, according to the compression strength of MC nylon, the theoretical load is 288-345t, and the actual load is 140t. It has been used in the open air for more than 5 years at the ambient temperature of 40-42 ℃. After excavating 5.265 million tons of ore, it is found that the surface is flat and smooth, and a good oil film has been formed, which proves that there is no wear on the base.

(5) Piston ring, support ring

The characteristics of using MC nylon as piston ring are as follows

Light weight (about 15% of the weight of bronze) reduces movement loss and saves mechanical power; good sliding performance, small difference between static and dynamic friction coefficient, so it will not stick like metal; good foreign body embedding performance, can avoid cylinder liner galling; oil-free self-lubricating, good sealing, not easy to leak, long service life, and improve work efficiency. The life test of MC nylon support ring for hydraulic cylinder was carried out on hsg63 / 35 × 700 hydraulic cylinder test bench of Changjiang Hydraulic Components Research Institute. Under high pressure and heavy load, after 170 h continuous impact and 320 000 cycles, the total reciprocating travel is 150 km, which proves that the durability and reliability are good and meet the requirements of national standards.

(6) Roller, roller

As MC nylon has the properties of drug resistance, wear resistance and self lubrication, it is suitable to be used as the outer liner of roller or metal roller, as well as for conveying guide roller, reverse roller and traveling roller. Compared with other materials, MC nylon has the advantages of long service life, easy processing, less refueling times, no oil leakage, no rust, no oil and rust stains, and no fiber contamination.

(7) Other aspects

In addition to the above introduction, MC nylon is used in many aspects, such as: mixer supporting wheel, valve body, valve core, ball valve gasket, insulating sleeve, guide plate, rubber baffle, etc.; in railway, there are moving axle box, lining plate, moving wheel spring, suspension sleeve, retaining ring, crosshead pulley, rocker small end small square tile, etc.; in shipbuilding industry, there are bearings, rudder bearings, water pump bearings, water pump impeller, pulley, etc Slider, sprocket, handle, anti electricity, seal, etc.


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