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Aqueous Medium Hydraulic Coupler In Use What Are The Disadvantages?
Jan 23, 2018

Disadvantages of using hydrodynamic couplings in service:

① After the temperature of aqueous medium is easy to vaporize, water vapor more easy to make the coupling chamber pressure, if not released will cause an explosion, so the aqueous medium fluid coupling except with fusible plug safety protection device Also set the explosive plug.

② Aqueous medium fluid coupling with a seal in the structure of the bearing outside, as water vapor is difficult to seal live, so often erosion bearings, bearing corrosion card to reduce life expectancy.

③ In order to prevent the hydraulic coupling from exploding when the internal steam pressure is high, the coupling housing is made thicker and needs to withstand the pressure of 3.4MPa without burst, so not only is the material used more than the oil-coupling device, The difficulty of casting the body also increased.

④ high water medium coupling failure rate is short, MT208 "scraper conveyor hydraulic coupling" standard reliability index provides fluid coupling in the underground operation of the average time between failures of not less than 2000h, the actual This indicator is also very difficult to achieve.

⑤ parts of the cavity surface to be anti-corrosion treatment, increasing costs.

 Due to the water medium in the working fluid chamber of the aqueous medium fluid coupler is easy to vaporize after being heated, the pressure in the cavity is increased, and if it is not released in time, the shell body will explode. Therefore, the fluid medium fluid coupling not only sets fusible plugs, Also set explosive plug safety protection device.