Abstract:
A light metal piston for an engine or compressor has two sheet steel inserts. Each insert has two pairs of elongated bands extending circumferentially away from a gudgeon pin boss. The bands nearer the crown end of the piston skirt are longer than those nearer the open end of the skirt, and preferably are also wider, so as to exert greater thermal expansion control nearer the crown end of the skirt than nearer the open end.
Abstract:
Corrosion resistant alloys in fluid ends to prolong the life of a well service pump. Methods of using such corrosion resistant alloys that provide a fluid end that has a corrosion resistant alloy having a fatigue limit greater than or equal to the tensile stress on the fluid end at maximum working pressure in the fluid end for an aqueous-based fluid; installing the fluid end in a well service pump; and pumping the aqueous-based fluid through the fluid end.
Abstract:
A hydraulic linear actuator system known as the “Dynaco Stepper Pump Hydraulics System” is which is an electrically driven hydraulic pump system made of durable materials for use in an electronically controllable hydraulic system comprised of: (a) an electrically driven stepper motor; (b) a hydraulic pump to pressurize a hydraulic fluid; (c) a means to connect the stepper motor to the hydraulic pump; (d) a pressurized reservoir for a quantity of hydraulic fluid; (e) a means to supply pressurized fluid to a hydraulic actuator; (f) the hydraulic actuator with a means to provide linear motion to an object; (g) the means to provide linear motion to an object; (h) a means to return lowered pressurized fluid to the reservoir. An alternative embodiment is further comprised of a controller with a series of feedback signals.
Abstract:
An adjustment ring for turbocharger applications, particularly in diesel engines, is described, which consists of an iron-based alloy with an austenitic basic structure with dendritic carbide precipitations.
Abstract:
A sliding device 1 includes a swash plate 3 rotated in association with a rotating shaft 2 and a plurality of semispherical shoes 4 sliding on the swash plate 3. The semispherical shoe 4 is formed of a ferrous material, and the swash plate 3 is manufactured using high-strength brass as a material.On a sliding surface 4A of the shoe 4, a large number of minute annular expandingly projecting parts 7′ are formed by laser hardening, and a lubricating oil passage 10′ consisting of a reticular concave part is also formed.Thereby, the sliding device 1 having excellent seizure resistance as compared with the conventional sliding device can be provided.
Abstract:
A coating composition is described, containing (a) a metallic matrix based on nickel, cobalt, iron; or combinations thereof; (b) a ceramic phase, containing at least one metal boride or metal silicide compound; and (c) a lubricant phase. Methods of providing wear-resistance and low-friction characteristics to an article (e.g., a gas turbine) are also described, using the coating composition. Related structures are also discussed.
Abstract:
A scroll compressor in which a scroll fixed lap rising from a fixed plate of a fixed scroll and a scroll orbiting lap rising from an orbiting plate of an orbiting scroll are combined with each other to form compression chambers therebetween, the fixed scroll is made of iron-based material, the orbiting scroll is made of aluminum-based material, at least the plate back surface of the orbiting scroll is subjected to surface processing.
Abstract:
The invention relates to a displacement machine, in particular a displacement pump used in an automobile and having two components movable slidably relative to one another. In order to keep the wear on the components low, even in the case of a poorly lubricating operating medium, there is provision for at least one component of the two components to be hardened at least on the surface and to consist of sintered material which contains predominantly ferrite and a constituent for improving the sliding properties. This design is particularly advantageous in automobile pumps operating with transmission oil or feeding fuel.
Abstract:
A three-dimensional piston molding is fabricated from a mixture of chopped, carbon tow filaments of variable length, which are prepregged with carbonaceous organic resins and/or pitches and molded by conventional molding processes into a near net shape, to form a carbon-fiber reinforced organic-matrix composite part. Continuous reinforcement in the form of carbon-carbon composite tapes or pieces of fabric can be also laid in the mold before or during the charging of the mold with the chopped-fiber mixture, to enhance the strength in the crown and wrist-pin areas. The molded chopped-fiber reinforced organic-matrix composite parts are then pyrolized in an inert atmosphere, to convert the organic matrix materials to carbon. These pyrolized parts are then densified by reimpregnation with resins or pitches, which are subsequently carbonized. Densification is also accomplished by direct infiltration with carbon by vapor deposition processes. Once the desired density has been achieved, the piston molds are machined to final piston dimensions, and piston ring grooves are added. To prevent oxidation and/or to seal the piston surface or near surface, the chopped-fiber piston is coated with ceramic and/or metallic sealants; and/or coated with a catalyst.