33results about How to "Good oil storage performance" patented technology

The invention provides a lubricating structure and a sealing structure with the same. The lubricating structure comprises an annular lubricating end face. The annular lubricating end face comprises acircular first converging area, a circular dam area and a circular second converging area in sequence in the direction towards the center. The first converging area and the second converging area areeach circumferentially arranged around the central point of the lubricating end face. The first converging area is provided with a plurality of first spiral grooves extending from the inner circumferential side of the first converging area to the outer circumferential side, and the first spiral grooves are circumferentially arranged around the center of the first converging area; and / or, the second converging area is provided with a plurality of second spiral grooves extending from the outer circumferential side of the second converging area to the inner circumferential side, and the second spiral grooves are circumferentially arranged around the center of the second converging area. According to the lubricating structure, under the high load, high speed or extreme once oiling and oil lacking conditions, the high oil storage capacity can be kept, and the direct contact between the end faces of a friction pair is reduced.

Disclosed is a floating type self-elevating drilling platform, having: a main deck (1) and an upper structure thereof, a floating pad (7), pile legs (6), a lifting mechanism (5) and a mooring system. The area and thickness of the floating pad (7) is greater than those of the main deck (1), and the pad is provided with a moon pool (9) in the middle and is internally divided into a plurality of cabins. A well drilling module is located at or close to a position above the geometrical centre of the main deck. There are three pile legs (6), all being of a truss structure; a bottom part of each pile leg (6) is in rigid connection with the floating pad (7); the main deck (1) is perpendicularly lifted and lowered along the pile legs via the lifting device (5), and is fixed at a pre-determined height; each pile leg (6) contains an upper and lower sections of hollow sealed body (61, 63), and during the operation, the waterline is located within a height range of the upper section and is positioned via the mooring system. Different from a traditional self-elevating platform, the present platform is not in contact with the seabed during the operation, and has a floatation centre higher than the centre of gravity, a good movement performance, and a high oil storage capacity, and the floating self-elevating drilling platform can be used for oil and gas drilling and production in a sea area within a water depth of 500 metres and is particularly suitable for a water depth of 200-500 metres.

The invention discloses a piston ring carbonitriding surface treatment method adopting liquid phase arc discharge. The method includes the steps that in a pressure-adjustable vessel containing solutions with specific compositions and concentrations, a piston ring to be treated serves as a cathode, an inert electrode material serves as an anode, direct-current impulse voltages are applied between the cathode and the anode, arc discharge is formed on the contact interface of the solutions and the piston ring, the solutions are ionized to produce plasmas containing carbon and nitrogen ions, the plasmas bears a combination reaction with the piston ring and diffuse into a workpiece, and carbonitriding is realized. Pressure waves produced by rupture of plasma bubbles are used for shaping rough and uneven micro-modelling on the surface of the piston ring. The pressure in the vessel is adjuted to control the formation amount and the critical rupture pressure of the plasma bubbles to improve the quality of surface treatment. The method is good in environment suitability, high in treatment speed and production efficiency, low in cost, energy-saving and environment-friendly. The piston ring treated by adopting the method has the advantages of being high in abrasion resistance, corrosion resistance, good in lubricating performance, high in fatigue strength and the like.

The invention discloses super-hydrophobic and super-oleophylic melamine foam and a preparation method and application thereof. The super-hydrophobic and super-oleophylic melamine foam is prepared by the following steps of using porous melamine foam as a substrate; chemically grafting the substrate with a substance of one or a mixture of trimethoxysilylpropanethiol and 3-mercaptopropyltriethoxysilane to activate the substrate; under the existence of ultraviolet light and light initiator, enabling the thiol and the vinyl of long-chain alkane acrylic ester to generate clicking chemical reaction, so as to enrich C-C long chains on the substrate, so that the surface energy of the substrate is reduced, the roughness is improved, the hydrophobic property is greatly improved, and the oil and water selectivity is obviously improved. The preparation method has the advantages that the hydrophobic modification on the melamine foam is precise, the efficiency is high, the operation is simple and convenient, the implementing is easy, the consumption time is short, the cost is low, and the method is suitable for large-scale production. The super-hydrophobic and super-oleophylic melamine foam can be directly applied to the sea oil overflow, recycling of leaked chemicals, separation of oil and water mixture, and the like.