REMOVABLE THROAT MOUNTED INLET GUIDE VANE

• US 20120121403A1
• Filed: 07/19/2010
• Published: 05/17/2012
• Est. Priority Date: 07/20/2009
• Status: Active Grant

• Current Assignee: Ingersoll-Rand Industrial U.S., Inc. (Ingersoll Rand, Inc.)
• Original Assignee: Cameron International Corporation (Schlumberger NV)
• Inventors: Sabin, Mark R., Gerber, Thomas E., Clemons, Jonathan D.
• Granted Patent: US 9,243,648 B2
• Time in Patent Office: Days
• US Class Current: 415/208.1
• CPC Class Codes: F01D 17/162 for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line F01D17/167 takes precedence
• CPC Class Codes: F04D 27/0246 by varying geometry within the pumps, e.g. by adjusting vanes
• CPC Class Codes: F04D 29/4213 suction ports
• CPC Class Codes: F04D 29/462 especially adapted for elastic fluid pumps
• CPC Class Codes: F05D 2250/51 Inlet
• CPC Class Codes: F05D 2260/74 by turning around an axis perpendicular the rotor centre line

Abstract

In certain embodiments, a system includes an inlet guide vane assembly. The inlet guide vane assembly includes a plurality of inlet guide vanes disposed in a radial pattern around a central axis and configured to rotate about axes orthogonal to the central axis. The inlet guide vane assembly also includes a plurality of vane shafts, each connected to a respective inlet guide vane and configured to rotate with the respective inlet guide vane about the respective orthogonal axis. The inlet guide vane assembly further includes a drive shaft directly connected to one of the vane shafts and configured to directly cause rotation of the vane shaft to which it is directly connected and to indirectly cause rotation of the remaining vane shafts in the plurality of vane shafts. In addition, the inlet guide vane assembly includes a rotary actuator connected to the drive shaft and configured to cause rotation of the drive shaft.

Claims

1. A system, comprising:

an inlet guide vane assembly, comprising;

a plurality of inlet guide vanes disposed in a radial pattern around a central axis and configured to rotate about axes orthogonal to the central axis;

a drive shaft coupled to a primary inlet guide vane of the plurality of inlet guide vanes, wherein the drive shaft rotates the primary inlet guide vane along a common rotational axis, and the drive shaft causes secondary inlet guide vanes of the plurality of inlet guide vanes to rotate about their respective axes offset from the common rotational axis; and

a rotary actuator coupled to the drive shaft and configured to cause rotation of the drive shaft.

2. The system of claim 1, comprising a compressor assembly connected to the inlet guide vane assembly, wherein the compressor assembly comprises an inlet shroud and a scroll casing.

3. The system of claim 1, wherein the inlet guide vane assembly comprises a pneumatic cylinder disposed around the drive shaft, wherein the pneumatic cylinder comprises an inlet buffer port configured to receive a buffer gas and an outlet buffer port configured to expel the buffer gas and a process gas leaking along the drive shaft.

4. The system of claim 3, wherein the drive shaft comprises a plurality of grooves extending circumferentially around the drive shaft, and wherein the inlet and outlet buffer ports of the pneumatic cylinder are positioned axially between adjacent grooves.

5. The system of claim 4, wherein the inlet guide vane assembly comprises a plurality of seals, and each seal is disposed within a respective groove of the drive shaft.

6. The system of claim 1, comprising a plurality of vane shafts, wherein each vane shaft is coupled to a respective inlet guide vane and is configured to rotate with the respective inlet guide vane about the respective axis.

7. The system of claim 6, wherein the inlet guide vane assembly comprises a plurality of crank arms, wherein each crank arm is connected to a respective vane shaft, and each crank arm is configured to rotate with its respective vane shaft.

8. The system of claim 7, wherein the inlet guide vane assembly comprises:

an inner housing disposed around the central axis and surrounding the plurality of inlet guide vanes;

an actuating ring disposed around the inner housing; and

a plurality of linkages, wherein each linkage is connected to a respective crank arm and is connected to the actuating ring.

9. The system of claim 8, wherein the plurality of linkages is configured to cause rotation of the actuating ring relative to the inner housing upon rotation of the crank arms.

10. The system of claim 8, wherein the inlet guide vane assembly comprises a plurality of cam followers coupled to the actuating ring, and each cam follower comprises a v-shaped groove configured to mate with a v-shaped track extending circumferentially around an exterior face of the inner housing.

11. The system of claim 8, wherein each linkage of the plurality of linkages comprise a pair of eye-shaped holes configured to mate with spherical bearings on the cranks arms and the actuating ring.