What kind of encoder for marine dredging ship

ask:

What are the special features of the dredge marine encoders compared to ordinary grade encoders?

answer:

The encoder for offshore dredging ships is used to control the positioning of the crank arm of the dredging device on the deck, which is different from that in the under-deck and in the control room, but it is exposed to the sea wind salt, water vapor, and high temperature continuous operation environment for a long time. Below, so the standard for the use environment of this encoder is high:

First, the corrosion resistance of the shell material against salt and sea breezes. The shell of the encoder with absolute number 9600 is an all-metal aluminum alloy that has undergone a special surface oxidation treatment.

Second, the encoder's shell package. Code number 9600 is an absolute value multi-turn encoder housing package. It is an all-metal, screwless, one-time fastening and hermetic packaging technology. This technology can hardly consider the convenience of maintenance. It is generally used in encoders with high return rate. Do not dare to use. The reason why no screws are required, because the screw material is generally different from the aluminum shell, in the sea during the daytime temperature temperature difference at night, under the temperature difference due to thermal expansion and contraction, the sealing properties of different material screws can no longer be guaranteed. The sea breezes are rich in salt, and these salts are very permeable (commonly known as "salt creeps"). The ions in the salts are very damaging to electrical corrosion and can quickly damage the internal electrical components of the encoder and fail.

Third, continuous high-temperature operation, high daytime temperatures in the South China Sea region, continuous operation at high temperatures, not only the high temperature rating of the product, but also the screening and quality management of each internal part, There are high demands. Code number 9600 multi-turn Absolute Encoder, the product in the detection phase, it must pass through the high temperature oven at 80 degrees for four consecutive hours of power signal detection.

Fourth, maintenance inconvenience away from the mainland. This requires that the encoder must be absolute coded for the full stroke and that there is no error in long-term use. And in this relatively harsh working environment, the high temperature continuous operation, the failure rate must be extremely low, and, in the event of signal problems, the ship's staff must be able to simply find and eliminate problems. Code 9600 absolute multi-turn encoder provides a set of 4-20mA signal output and a set of RS485 signal output, 4-20mA signal can be detected by the ship's electrician with a multimeter, and RS485 signal can be used as Remote transmission to the control room monitoring, pre-judging the encoder in advance is working properly.

The code number 9600's absolute multi-turn encoder was first used 6 years ago for dredgers at Shanghai Yangshan Port. It was used for positioning control of dredging booms on the deck. After years of use, it was virtually trouble-free. return. For this reason, dredgers belonging to the China Railway Bureau ordered the 9600 absolute multi-turn encoder several times. In a recent order, customers revealed the application of dredgers in the South China Sea. We are proud that Chinese industrial control people can use China's manufacturing of industrial control products to build a force for the South China Sea!