摘要:
A pump for an oil and gas well includes a barrel with a surface configured to contact oil and gas well fluid. The pump further includes a first coating formed on at least a portion of the barrel surface. The first coating includes a combination of diamond particles and a composition including nickel and phosphorous. The pump also includes a plunger with a surface configured to contact oil and gas well fluid. The pump additionally includes a second coating formed on at least a portion of the plunger surface. The second coating includes a combination of tungsten carbide particles and a composition including cobalt and chromium.
摘要:
A sliding member for a compressor, comprising a base body formed of a material which contains aluminum as a major component, and an electroless nickel plating layer formed on a surface of the base body and containing phosphorous (P) and boron (B), wherein the improvement comprises: the electroless nickel plating layer being a non heat-treated layer containing the phosphorous in an amount of 0.5-5.0 wt. % and the boron in an amount of 0.05-0.2 wt. %.
摘要:
A swash plate type axial piston pump improved in respect to wear or abrasion-resistant capability of sliding members of the pump adapted to rotate relative to each other for protecting them from rapid wearing even upon high rotation of the pump. The axial piston pump includes a housing (1), a rotatable shaft (3) supported rotatably within the housing (1), an axial piston pump including a cylinder block (15) mounted on the shaft (3) axially slideably therealong and co-rotatably therewith and a plurality of pistons (21) accommodated axially reciprocatively within a corresponding number of cylinders, respectively, which extend axially, being arrayed around the rotatable shaft (3), a swash plate (23) disposed for moving reciprocatively the pistons (21) in axial direction as the shaft (3) is rotated, and a plurality of sliding members which are incorporated slideably relative to one another for constituting parts of the pump. At least one of the plural sliding members such as the valve plate (31), the cylinder block (15), the shoe (25), the swash plate (23), the shoe holder (27) and the supporting member (24) is coated with a nickel-phosphor-Teflon layer by plating.
摘要:
A wobble plate in a wobble plate compressor has a bevel gear positioned at a central portion thereof. The bevel gear is provided with a centered ball seat. A second bevel gear is supported on the cylinder block and also has a centered ball seat. A bearing ball is seated in both of the ball seats so that the wobble plate nutates about the ball. At least one of the bevel gears is coated with electroless composite plating layer having a self-lubricative material, such as polytetrafluoroethylene (PTFE), dispersed therein. Consequently, the bevel gears have low frictional resistance, high hardness and improved anti-seizure characteristics.
摘要:
A plating liquid for forming a nickel plating layer containing a dispersed substance and phosphorus having 1.0 g/l or more of sodium is desirably utilized in the high speed plating process. Other important aspects of the invention include a plating method using the aforementioned plating liquid, characterized in that a voltage is impressed while permitting the plating liquid to flow between a surface to be plated of a workpiece at a plating liquid flow rate of 1.0-3.0 m/sec and an electric current density of 20-200 A/dm.sup.2, and an engine cylinder having a plated interior surface characterized in that the plating layer of the cylinder is formed by a high speed plating treatment using the aforementioned plating liquid.
摘要:
An aluminum foil to be etched for use as the electrolytic condenser electrodes is composed of a foil body of an aluminum purity of 99.9% or higher, and an oxide layer 20-70 .ANG. thick and formed due to contact of the foil body with an oxidizing atmosphere. At least one etching nuclei-forming element is concentrated in a boundary region and/or in an outermost surface region of the oxide layer, the boundary region being disposed between the foil body and the oxide layer, and both the regions having a thickness of 20 .ANG. or less. The ratio in ion intensity of a maximum concentration of the elements in these regions to a concentration of the elements in the inner layer of the foil body is 1.2-30. There are three patterns in distribution of the elements, so that the maximum concentration is in a predetermined ratio to the concentration in the surface region, the inner layer or a minimum concentration appearing between the regions. The foil will be etched to be ready for use as the electrolytic condenser electrodes.
摘要:
A cylinder liner comprises an alloy plating film of Ni-B or Ni-P or Ni-Co-P formed on at least a part contacting with cooling liquid in an outer peripheral surface and further a nitrided layer formed on an inner peripheral surface to improve an anti-cavitation characteristic, a sliding characteristic and an anti-corrosion characteristic and facilitate a manufacturing of the cylinder liner.