Sectional sealing system for rotary screw compressor

A sectional sealing system positioned about a shaft of a rotor that is used to compress a working fluid in a compression chamber of a water-spray type compressor, the sectional sealing system configured to prevent the leakage of working fluid and coolant from a compression chamber and to prevent leaked coolant and working fluid from intermixing with lubricant from a bearing system, the sectional sealing system comprising:

• a first suction side seal section having a seal configured to inhibit the flow of working fluid and coolant from a suction side of the compression chamber;
• a second suction side seal section positioned upstream from the first suction side seal section, the second suction side seal section including a labyrinth seal configured to inhibit the flow of working fluid and coolant that flowed past the first suction side seal section;
• and
• a third suction side seal section positioned upstream from the second suction side seal section, the third suction side seal section including at least one labyrinth seal configured to inhibit the flow of lubricant that was provided to lubricate the bearing system.

A sectional sealing system positioned about a first shaft and a second shaft of a rotor that is used to compress working fluid in a compression chamber, the sectional sealing system comprising:

• a suction side sealing portion positioned about the first shaft, the suction side sealing portion having a first suction side seal, a first suction side labyrinth seal, and a second suction side labyrinth seal, the first suction side seal being in proximity to a suction side of the compression chamber, the first suction side seal and the first suction side labyrinth seal configured to inhibit the upstream flow of coolant and working fluid along the first shaft, the second suction side labyrinth seal configured to at least inhibit the downstream flow of lubricant along the first shaft to prevent lubricant from flowing toward a second suction side seal;
• and
• a discharge side sealing portion positioned about the second shaft, the discharge side sealing portion having a first discharge side seal, a second discharge side seal, a first discharge side labyrinth seal, and a second discharge side labyrinth seal, the first discharge side seal being in proximity to a discharge side of the compression chamber, the first and second discharge side seals and the first discharge side labyrinth seal configured to inhibit the downstream flow of coolant and working fluid along the second shaft, the second discharge side labyrinth seal configured to inhibit the upstream flow of lubricant along the second shaft.