Abstract:
A scroll compressor with unfastened thrust plate includes a compressor housing and scroll compressor bodies disposed in the compressor housing. The scroll bodies include a fixed scroll body and a moveable scroll body. The fixed and moveable scroll bodies have respective bases and respective scroll ribs that project from the respective bases. The scroll ribs mutually engage. The moveable scroll body is movable relative to the fixed scroll body for compressing fluid. An upper bearing member provides axial thrust support to the moveable scroll compressor body through a bearing support via an unfastened thrust plate that is located between the upper bearing member and the moveable scroll body. The unfastened thrust plate has no means of attachment to the upper bearing member or to the moveable scroll body.
Abstract:
A scroll compressor is provided with a recess to increase the flow area through which compression chambers communicate with a discharge port. The scroll compressor is of the sort having a wrap with a swing radius that is always equal to or greater than zero. That is, this invention does not apply to the type of scroll compressor wherein a swing radius will cross zero as the wrap is generated. Stated another way, a forward ledge of the scroll compressor can be defined spaced towards a tip of the scroll wrap relative to a rear ledge. The present invention provides a recess in the type of scroll wrap wherein the forward ledge has a thickness that is at least equal to or greater than the thickness of the scroll wrap at the rear ledge. A supplemental recess may be provided in the non-orbiting scroll wrap. The recess in the orbiting scroll may be stepped to have different height portions.
Abstract:
A method of operating a refrigeration system having at least three compressors, in which each compressor has an oil sump with oil at an oil level. The method includes separately connecting the oil sumps of the at least three compressors. Each separate connection allows oil flow only between the oil sumps of two of said compressors thereby preventing bypass flow. The method further includes flowing oil between oil sumps of the at least three compressors and along the separate connections to tend to equalize the oil levels among the oil sumps of the at least three compressors.
Abstract:
A scroll-type displacement machine has fixed and orbiting scrolls (20, 30) and an Oldham rotation prevention ring (50). A drive module (40) positioned between the orbiting scroll (30) and drive shaft (71) incorporates an eccentric drive system (42) and first and second counterweights (48, 49) for dynamic balancing. The motor (70), motor bearings, and motor shaft or drive shaft (71) form a separate modular unit attached to the compressor frame (80). A low-pressure port (21) is located at a radial outer portion of the fixed scroll and a high-pressure discharge port (39) is located in the floor of the orbiting scroll at its axis, with high pressure flow passing over and around the eccentric drive bearing and drive mechanism. The Oldham ring (50) is distributed on a lateral or radial plane of the scroll pair with a portion surrounding a portion of the fixed scroll (20) and another portion surrounding a portion of the orbiting scroll (30) and may be formed as four arcuate members (57, 58) arranged on two levels.
Abstract:
A scroll compressor is provided with a recess to increase the flow area through which compression chambers communicate with a discharge port. The scroll compressor is of the sort having a wrap with a swing radius that is always equal to or greater than zero. That is, this invention does not apply to the type of scroll compressor wherein a swing radius will cross zero as the wrap is generated. Stated another way, a forward ledge of the scroll compressor can be defined spaced towards a tip of the scroll wrap relative to a rear ledge. The present invention provides a recess in the type of scroll wrap wherein the forward ledge has a thickness that is at least equal to or greater than the thickness of the scroll wrap at the rear ledge. A supplemental recess may be provided in the non-orbiting scroll wrap. The recess in the orbiting scroll may be stepped to have different height portions.