How to choose electric wire rope hoist ring

To make a reasonable selection of seals, wire  rope hoist  must be familiar with a variety of forms and characteristics sealing device, the sealing material characteristics and conditions of use of the sealing means, such as the size of the working pressure, the working environment temperature, speed of the moving part . The actual conditions of use and allows the use of seals compared to the condition, it must ensure that the sealing device has a good sealing performance and long life.

Sealing material has to be compatible with the hydraulic oil, its hardness to the right. Electric wire rope hoists rubber hardness level of the system working pressure to choose. System pressure is selected high hardness rubber seals, pressure is too high, the need to design the support ring.
To make reliable sealing, long life, in the design of the seal groove, there must be an appropriate amount of compression ratio and tensile, compression rate can not be too large nor too small. Increase in the compression stress is too large, friction increases, accelerating seal wear, also easy to damage distorted short life, sometimes resulting assembly difficulties; too small, the sealing is not good, resulting in leakage.
Ring because the structure is simple, easy to install, good sealing performance and reliable operation, as static sealing when almost no leaks, it is currently used widely seals. Electric wire rope  lift hoist  is less than the amount of stretch the seal and outer circles of the 0-ring, in terms of increased life expectancy considerations, the design should be avoided centerline diameter ring is stretched, it should be possible according to the ring GB for choice, and wire rope  chain block  seal groove should be designed according to the appropriate standards. In the case of last resort only to design, but the size tolerances must be strictly controlled to meet the requirements roughness, because the sealing groove width is too large or too deep can cause the amount of compression caused by not enough leakage.