Abstract: A mechanism modulates a fluid flow in a diffuser flow path of a compressor diffuser, including: a shroud disposed on the diffuser flow path and having a cam and a driving wheel fixed base; a diffuser vane having a diffuser guide vane disposed in the diffuser flow path and a diffuser vane shaft fixedly disposed on the diffuser vane that penetrates from the diffuser flow path through the shroud; a driving ring sleeved on the cam and having a moving bar; a sliding block having one end connected with one end the diffuser vane shaft that penetrates through the shroud, and the other end sleeved on a sliding groove formed on the moving bar; a driving wheel disposed in the driving wheel fixed base and having a driving shaft connected to an actuator outside of the compressor; and a driving cable connected to the driving wheel and the driving ring.

Abstract: A mechanism modulates a fluid flow in a diffuser flow path of a compressor diffuser, including: a shroud disposed on the diffuser flow path and having a cam and a driving wheel fixed base; a diffuser vane having a diffuser guide vane disposed in the diffuser flow path and a diffuser vane shaft fixedly disposed on the diffuser vane that penetrates from the diffuser flow path through the shroud; a driving ring sleeved on the cam and having a moving bar; a sliding block having one end connected with one end the diffuser vane shaft that penetrates through the shroud, and the other end sleeved on a sliding groove formed on the moving bar; a driving wheel disposed in the driving wheel fixed base and having a driving shaft connected to an actuator outside of the compressor; and a driving cable connected to the driving wheel and the driving ring.

Abstract: A centrifugal impeller employed in a centrifugal machine, includes a main body, the main body generally being conical and defining a shaft bore in a center portion thereof; and a plurality of blade groups evenly arranged surrounding the shaft bore in sequence, each of the blade groups having a plurality of blades wherein neighboring blades having an interval angle, and the number and corresponding interval angles of the blades of different blade groups are identical. The present impeller structure can be employed to distribute the concentrated energy of the discrete tones noise of the blades, which is generated by the high-speed rotation impeller, and further to reduce the operating tones noise.

Abstract: A rotor mechanism of a centrifugal compressor connectable to a power output device and configured to block leakage of lubricants and to recycle lubricants to an oil sump is provided, which includes a rotary shaft with a rolling bearing and a screw nut, a bearing housing for receiving the rolling bearing, and a bearing plate connected to the bearing housing. The screw nut has a surface provided with an oil throw seal, and the bearing housing. As the bearing plate is provided with an oil channel in contact with the oil-returning hole and either one of the bearing housing and the bearing plate is provided with a first labyrinth seal in contact with the screw nut, lubricants leaking out of the rolling bearing is allowed to go to the oil sump via the oil channel and oil-returning hole. The oil slinger thus blocks the lubricants from leaking out of the first labyrinth seal.

Abstract: A flow passage structure can be disposed in a multi-stage centrifugal refrigerant compressor having a deswirl vane and a return channel bend. The flow passage structure includes a two-way flow passage having a first outlet and a second outlet, for diverging externally injected refrigerant; a first side discharge flow passage connected to the first outlet of the two-way flow passage and having a first side outlet disposed below the deswirl vane, such that the diverged refrigerant can be discharged into the return channel bend and uniformly mixed with the refrigerant in the return channel bend; and a second side discharge flow passage connected to the second outlet of the two-way flow passage and having a second side outlet disposed below the deswirl, vane, such that the diverged refrigerant can be injected into the return channel bend and uniformly mixed with the refrigerant in the return channel bend.

Abstract: A rotor mechanism of a centrifugal compressor connectable to a power output device and configured to block leakage of lubricants and to recycle lubricants to an oil sump is provided, which includes a rotary shaft with a rolling bearing and a screw nut, a bearing housing for receiving the rolling bearing, and a bearing plate connected to the bearing housing. The screw nut has a surface provided with an oil throw seal, and the bearing housing. As the bearing plate is provided with an oil channel in contact with the oil-returning hole and either one of the bearing housing and the bearing plate is provided with a first labyrinth seal in contact with the screw nut, lubricants leaking out of the rolling bearing is allowed to go to the oil sump via the oil channel and oil-returning hole. The oil slinger thus blocks the lubricants from leaking out of the first labyrinth seal.

Abstract: A flow passage structure can be disposed in a multi-stage centrifugal refrigerant compressor having a deswirl vane and a return channel bend. The flow passage structure includes a two-way flow passage having a first outlet and a second outlet, for diverging externally injected refrigerant; a first side discharge flow passage connected to the first outlet of the two-way flow passage and having a first side outlet disposed below the deswirl vane, such that the diverged refrigerant can be discharged into the return channel bend and uniformly mixed with the refrigerant in the return channel bend; and a second side discharge flow passage connected to the second outlet of the two-way flow passage and having a second side outlet disposed below the deswirl, vane, such that the diverged refrigerant tan be injected into the return channel bend and uniformly mixed with the refrigerant in the return channel bend.

Abstract: A centrifugal impeller employed in a centrifugal machine, includes a main body, the main body generally being conical and defining a shaft bore in a center portion thereof; and a plurality of blade groups evenly arranged surrounding the shaft bore in sequence, each of the blade groups having a plurality of blades wherein neighboring blades having an interval angle, and the number and corresponding interval angles of the blades of different blade groups are identical. The present impeller structure can be employed to distribute the concentrated energy of the discrete tones noise of the blades, which is generated by the high-speed rotation impeller, and further to reduce the operating tones noise.