초록 ▼

A body located downstream of the compressor discharge port in an oil-injected screw compressor assembly includes a contoured surface for directing the flow of the gas-oil mixture discharged from the compressor. The body is movable in the compressor assembly between a first position in which the flow

A body located downstream of the compressor discharge port in an oil-injected screw compressor assembly includes a contoured surface for directing the flow of the gas-oil mixture discharged from the compressor. The body is movable in the compressor assembly between a first position in which the flow of the mixture out of the discharge port is unimpeded and a second position in which the backflow of gas from downstream of the discharge port back into and through the working chamber of the compressor is prevented. In the first position the body facilitates the separation of oil from the discharged compressed gas while in the second position the reverse direction rotation of the screw rotors in the compressor working chamber is prevented. The body is positionable to the first position under the impetus of the mixture discharged from the compressor and is positionable to the second position under the impetus of the initial backflow of gas from downstream of the compressor, back to the compressor, which occurs upon compressor shutdown.

대표청구항 ▼

Apparatus for preventing the reverse rotation of screw rotors in a screw compressor upon compressor shutdown comprising: a body located downstream of the discharge port of said compressor and moveable with respect to said discharge port between a first position in which the flow of compressed gas fr

Apparatus for preventing the reverse rotation of screw rotors in a screw compressor upon compressor shutdown comprising: a body located downstream of the discharge port of said compressor and moveable with respect to said discharge port between a first position in which the flow of compressed gas from said discharge port is unimpeded while said compressor is in operation and a second position in which the backflow of gas through said discharge port from downstream of said compressor is prevented, said body having a contoured surface; and means for mounting said body for movement between said first and said second positions, said body being mounted on said mounting means so that said contoured surface faces into the flow of gas discharged from said compressor, said contoured surface diverting the discharge gas which impacts it.