Compressor with liquid injection cooling

A positive displacement compressor, comprising:

• a compression chamber defined by an interior of a casing having a first end, a second end;
• a shaft located in the compression chamber and mounted to the casing for rotation relative to the casing;
• a rotor disposed in the compression chamber and mounted for rotation with the shaft relative to the casing, the rotor having a sealing portion;
• a gate having a first end and a second end;
• and
• a gate positioning system operable to locate the first end of the gate proximate to the rotor as the rotor turns,
• wherein a portion of the gate positioning system is disposed outside of the compression chamber,
• wherein the gate positioning system comprises at least one cam that drives the gate positioning system,
• wherein the gate positioning system comprises:
• at least one cam follower connected to the at least one cam;
• and
• a gate support arm connecting the gate to the cam follower such that movement of the at least one cam follower causes movement of the gate, and
• wherein the gate positioning system comprises at least one spring connected to the cam follower so as to urge the cam follower to maintain contact with the cam.

A positive displacement compressor, comprising;

• a cylindrical rotor casing, the rotor casing having an inlet port, an outlet port, and an inner wall defining a rotor casing volume;
• a rotor, the rotor having a sealing portion that corresponds to a curvature of the inner wall of the rotor casing;
• at least one liquid injector connected with the rotor casing to inject liquids into the rotor casing volume;
• and
• a gate, having a first end and a second end, and operable to move within the rotor casing to locate the first end proximate to the rotor as it turns;
• wherein the gate separates an inlet volume and a compression volume in the rotor casing volume, the inlet port is configured to enable suction in of gas, and the outlet is configured to enable expulsion of both liquid and gas,
• wherein the compressor further comprises a gate positioning system operable to locate the first end of the gate proximate to the rotor as the rotor turns,
• wherein the gate positioning system comprises at least one cam that drives the gate positioning system,
• wherein the gate positioning system comprises:
• at least one cam follower connected to the at least one cam;
• and
• a gate support arm connecting the gate to the cam follower such that movement of the at least one cam follower causes movement of the gate, and
• wherein the gate positioning,system comprises at least one spring connected to the cam follower so as to urge the cam follower to maintain contact with the cam.