Variable geometry regulation system of a compressor for a heating, ventilation, air conditioning, and/or refrigeration system

A variable geometry diffuser (VGD) regulation system for a compressor of a heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system, comprising:

• a first VGD ring positioned adjacent to a first diffuser passage of the compressor, the first VGD ring comprising a vane;
• a second VGD ring positioned at least partially within a second diffuser passage of the compressor;
• and
• a VGD ring assembly coupled to the first VGD ring and the second VGD ring, wherein the VGD ring assembly is coupled to the second VGD ring by at least one rod that extends through the first VGD ring and the vane before coupling to the second VGD ring.

A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system, comprising:

• a variable geometry diffuser (VGD) regulation system for a compressor of the HVAC&R system, comprising:
• a first VGD ring comprising a vane and positioned adjacent to a first diffuser passage of the compressor;
• a first VGD ring actuator assembly coupled to the first VGD ring and configured to actuate the first VGD ring to extend into or retract out of the first diffuser passage;
• a second VGD ring positioned at least partially within a second diffuser passage of the compressor;
• and
• a second VGD ring actuator assembly coupled to the second VGD ring and configured to actuate the second VGD ring to extend into or retract out of the second diffuser passage, wherein the second VGD ring actuator assembly is coupled to the second VGD ring by at least one rod that extends through the first VGD ring and the vane before coupling to the second VGD ring;
• and
• a control system communicatively coupled to the VGD regulation system, wherein the control system is configured to control actuation of the first VGD ring and the second VGD ring.