Modular skid base

• US 8,857,781 B2
• Filed: 11/01/2012
• Issued: 10/14/2014
• Est. Priority Date: 11/01/2011
• Status: Active Grant

• Current Assignee: Cummins Power Generation Inc (Cummins Incorporated)
• Original Assignee: Cummins Power Generation Inc (Cummins Incorporated)
• Inventors: Wang, Edward J., Tjenstrom, Brian D., Peterson, Gregory P., Seidlitz, Steve N., Sandlass, Gary
• Primary Examiner(s): Waks, Joseph
• Application Number:
  US13/666,288
• Publication Number:
  US 20130106113A1
• Time in Patent Office: 712 Days
• Field of Search: 290/1.A, 248/639
• US Class Current: 248/678
• CPC Class Codes: F02B 63/04 for electric generators
• CPC Class Codes: F16M 1/00 Frames or casings of engines, machines or apparatus; Frames serving as machinery beds
• CPC Class Codes: F16M 5/00 Engine beds, i.e. means for supporting engines or machines on foundations
• CPC Class Codes: F16M 7/00 Details of attaching or adjusting engine beds, frames, or supporting-legs on foundation or base; Attaching non-moving engine parts, e.g. cylinder blocks elastic or equivalent mounting for absorbing vibrations F16F, especially F16F15/04
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A modular skid base is provided for supporting, for example, a power generation system that includes a prime mover (e.g., an engine) and a driven machine (e.g., an alternator; a generator; a compressor; a pump; a gear drive for, for example, heavy industrial applications; or any other type of load device). The modular skid base includes a pair of first support skid rails and a pair of second support skid rails. The modular skid base also includes an overlapping section that includes a portion of the second support skid rails overlapping a portion of the first support skid rails along a length direction of the modular skid base. The overlapping section can provide stiffness where required without adding height and mass to the entire modular skid base.

Claims

1. A power generation system and skid base combination comprising:

a prime mover;

a generator; and

a skid base supporting the prime mover and the generator, the skid base including;

a pair of first support members, each of the first support members having an inner surface along a length of the respective first support members and an outer surface along the length of the respective first support members,

a pair of second support members coupled to the first support members, each of the second support members having an inner surface along a length of the respective second support members and an outer surface along the length of the respective second support members,

wherein a portion of the inner surface of each of the second support members overlaps a portion of the outer surface of each of the first support members to form an overlapping section that extends along a length direction of the of the first and second support members, the overlapping section having a length that defines a resonant frequency of the skid base with the prime mover and the driven machine that is outside of an operating frequency of the prime mover.

2. The power generation system and skid base combination of claim 1, wherein the length of the overlapping section is at least two times the height of the skid base.

3. The power generation system and skid base combination of claim 1, wherein the prime mover includes an engine flywheel housing and the generator includes a generator adapter connected to the engine flywheel housing, and

wherein the overlapping section is positioned underneath an area where the generator adapter is connected to the engine flywheel housing.

4. The power generation system and skid base combination of claim 1, wherein the overlapping section is positioned underneath an area where the prime mover and the generator are connected.

5. The power generation system and skid base combination of claim 1, further comprising one or more cross members connecting the inner surface of one of the first support members to the inner surface of the other first support member.

6. The power generation system and skid base combination of claim 5, wherein a first cross member connects the first support members at a first end of the skid base.

7. The power generation system and skid base combination of claim 6, wherein a second cross member connects the inner surface of one of the second support members to the inner surface of the other second support member at a second end of the skid base opposite the first end.

8. The power generation system and skid base combination of claim 7, wherein a third cross member connects the first support members within the overlapping section.

9. The power generation system and skid base combination of claim 8, wherein the third cross member is positioned to allow a user access to an oil pan of the prime mover.

10. The power generation system and skid base combination of claim 9, wherein the generator is mounted to the first cross member and to the third cross member.

11. The power generation system and skid base combination of claim 8, wherein a fourth cross member connects the first support members at an end of the first support members within the overlapping section.

12. The power generation system and skid base combination of claim 11, wherein the second cross member defines a cutout portion at a top surface of the second cross member to receive the driven machine, and the fourth cross member defines a cutout portion at a top surface of the fourth cross member to receive the driven machine, and wherein the driven machine is mounted to the second cross member and to the fourth cross member.

13. The power generation system and skid base combination of claim 1, wherein the skid base includes a generator section for supporting the generator, the generator section provided at a first end of the overlapping section and formed by a remaining portion of the second support members, and a prime mover section for supporting the prime mover, the prime mover section provided at a second end of the overlapping section and formed by a remaining portion of the first support members.

14. The power generation system and skid base combination of claim 1, wherein each of the second support members includes a first end having an edge that is in contact with the outer surface of one of the first support members, and

wherein the first end of one or both of the second support members includes a diagonally cut face configured to reduce a stress concentration of the skid base near the first end of the second support member, the diagonally cut face formed such that the inner surface of the second support member is longer than the outer surface of the second support member.

15. The power generation system and skid base combination of claim 1, wherein the length of the overlapping section is at least ⅓

the length of the first support members.

16. The power generation system and skid base combination of claim 1, wherein the length of the overlapping section is at least ⅓

the length of the second support members.

17. The power generation system and skid base combination of claim 1, wherein the overlapping section extends underneath the driven machine by at least ⅓

a length of the driven machine, and extends underneath the generator by at least ⅓

a length of the generator.