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US 2019/0101121 A1Published application
Screw compressor with oil injection at multiple volume ratios
AssigneeIngersoll-Rand Company
InventorsDANIEL R. CRUM, RYAN PATRICK COLEMAN, NOBIN CHERIAN
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Abstract
The present disclosure is directed to a screw compressor system having a compressor housing with a pair of screw rotors rotatably supported within a compression chamber. Lubricant is injected into a compression chamber at a first volume ratio and at a second volume ratio greater than the first volume ratio to increase the sealing and lubrication between the screw rotors and rotor bores in the compressor housing as well as to increase heat transfer from a compressed working fluid in the compression chamber.
Claims21
A compressor comprising:
- a compressor housing;
- a compression chamber extending between first and second ends of the housing;
- an inlet port upstream of the compression chamber;
- a discharge port downstream of the compression chamber;
- male and female screw rotors rotatably meshed together within the compression chamber, the screw rotors operable for compressing a working fluid;
- a compression pocket defined by a region in the compression chamber that is sealed from the inlet port and the discharge port;
- a volume ratio defined within the compression pocket, the volume ratio varying between 1.0 at an entrance region proximate the first end of the compression chamber and a design maximum volume ratio at an exit region proximate the second end of the compression chamber;
- a first lubricant injector configured to inject lubricant into the compression chamber at a first volume ratio;
- and
- a second lubricant injector configured to inject lubricant into the compression chamber at a second volume ratio, wherein the second volume ratio is larger than the first volume ratio.
7 more elements
A compressor comprising:
- a compressor housing;
- a compression chamber extending between first and second ends of the housing;
- an inlet port upstream of the compression chamber;
- a discharge port downstream of the compression chamber;
- male and female screw rotors rotatably meshed together within the compression chamber, the screw rotors operable for compressing a working fluid;
- a compression pocket defined by a region in the compression chamber that is sealed from the inlet port and the discharge port;
- a first lubricant injector port configured to inject lubricant into the compression chamber at a first volume ratio;
- and
- a second lubricant injector port configured to inject lubricant into the compression chamber at a second volume ratio, wherein the second volume ratio is larger than the first volume ratio.
6 more elements
A method comprising:
- compressing a working fluid in a compression chamber with a meshed pair of male and female screw rotors;
- injecting lubricant into the compression chamber at a first volume ratio;
- injecting lubricant into the compression chamber at a second volume ratio, the second volume ratio being greater than the first volume ratio.
Dependencies are inferred from the claim text.