Abstract:
A swash plate type compressor that provides long lasting high lubricating performance to the sliding contact surfaces of a swash plate end shoes. The surface of the swash plate or the shoes on which the swash plate comes in sliding contact with the shoes is provided with an alloy plating layer, in which tin is the main component, as a surface treating layer. An coating layer, in which molybdenum disulfide is the main component, is formed as a solid lubricant layer on the foregoing plating layer. Preferably, the swash plate is made of aluminum or an aluminum alloy, and its surface is provided with the plating layer and the coating layer. More preferably, the coating layer contains graphite.
Abstract:
An electrochemical method of modifying the surface hardness of a non-allotropic metal member 10, comprising: (a) forming the member to near net-shape with at least one surface 12 to be hardened; (b) subjecting the surface 12 to rapid melting and resolidification by incidence of an electrical discharge between an electrode 16 and the surface 12 closely spaced thereto, the spacing containing an electrolyte with plasma forming capability, the surface 12 being hardened by crystallographic change of the globules resulting from substitutional alloying; and (c) cropping the surface grains 29 of the surface to increase load bearing capacity while retaining liquid retention capacity. The invention, in another aspect, is a unitary aluminium based swashplate member useful in a compressor, comprising: (a) a plate drivingly rotatable about an axis through its centre but canted to the plane of the plate; (b) integral shoulders on opposite sides of the plate, each presenting a thrust surface for receiving a plurality of rolling bearing loads, the thrust surfaces being centred about such axis and being in a plane normal to such axis; and (c) each thrust surface having (i) a hardness enhanced thermochemically by electric discharge to a depth of 100 Mm, and (ii) a surface hardness of 1.5 MmRa or less, the thrust surfaces being effective to substantially reduce the cost of swashplate fabrication and reduce load bearing failures.
Abstract:
The invention relates to a pumping system (12) for supercritical extraction comprising: inlet means adapted to be connected to a source of supercritical fluid; outlet means adapted to provide the pumped fluid to a pressure vessel (18 and 24A); and pumphead means (300) having a pumping chamber (336) communicating with said inlet means and with said outlet means; a piston (304); an inlet valve means controlling the flow of fluid into said pumping chamber (336) means through said inlet means; an outlet valve means controlling the flow of fluid from said pumping chamber means (336) through said outlet means; an inlet conduit means defining a flow path between said inlet valve and said pump chamber (336); and an outlet conduit means defining a flow path between said pump chamber (336) and said outlet valve means; characterized by an air-cooled thermoelectric-cooled heat exchanger means (386) for cooling both the inlet means and the pumphead means (300).
Abstract:
To avoid deposits on the restrictor that channels extractant into a collector (1901), a heated capillary tube (1900) pressure release restrictor has a thermally insulated outlet end in a collecting trap (1908) substantially colder than the capillary tube (1900). The restrictor is heated between the insulation (1906) and the capillary tube (1908) by Joulean heating. The solvent in the trap (1908) is at a pressure of 5 to 200 psi above atmospheric pressure. The thermal resistance of the insulation (1906) is selected to reduce the heat added to the extractant to a minimum, to keep the extractant from freezing, and to reduce partitioning of the extract and extractant. It has a thermal conductivity no greater than 60 BTU's per hour, per square foot, per inch for a one degree Fahrenheit difference.
Abstract:
A compressor for use with HFC refrigerant, comprising:
a sealed casing; a motor housed within the sealed casing; compression machinery also housed within the sealed casing, the compression machinery including a cylinder, a roller housed in the cylinder, a blade dividing the inner space between the cylinder and the roller into suction space and discharge space; a blade groove slidably housing the blade therein; the surface accuracy of the blade groove inner surface of at least the suction side of the cylinder blade grooves which compose the sliding members of the said compressor being formed to not more than 1.6s; and an at least tetravalent ester oil for the refrigerating machine oil which lubricates the compression machinery.
Abstract:
A surface of aluminium alloy or iron alloy coated, on at least a part, with a lead-free copper-based coating layer comprising, by weight, 0.2-15% bismuth, and at least one metal selected from the group consisting of 5-40% nickel, 1-20% chromium, 1-20% iron, and 1-10% cobalt, the balance being copper which is more than 55%. The surface may be of a swashplate used in swashplate type compressors.