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290results about How to "Prevent creep" patented technology

Damping device of a mechanical tensioning system for a traction mechanism drive

The invention relates to a damping device of a mechanical tensioning system (1, 1') for a traction mechanism drive, for example of a motor vehicle, for damping pivoting movements of a tensioning arm (2) which is supported at one end via a tensioning roller on a traction mechanism and which is rotatably mounted at the other end on a positionally fixed housing part (3), having an annular friction element (8, 8'), the periphery of which is formed as a friction lining (9, 9') which, to generate a friction torque, interacts with a friction surface (15) of the housing part (3) which surrounds the friction element (8, 8'), wherein a torsional spring (11, 11') which connects the housing part (3) and the tensioning arm (2) in terms of rotational force, which is embodied as a coil spring and by means of which the tensioning arm (2) can be acted on with a torsional moment so as to generate a continuous preload of the traction mechanism is supported on the friction element (8, 8') and exerts a radially outwardly acting force on the friction lining (9, 9'). In order that the damping device has a high level of operational reliability and load capacity and a long service life and is neverthelessof structurally simple and cost-effective design, surface contact means (14, 24) which act on the friction lining (9, 9') are provided for the transmission of the radial force between the torsional spring (11, 11') and the friction lining (9, 9').
Owner:SCHAEFFLER TECH AG & CO KG

Pressure-balanced photoelectric separation device for main submarine base stations

The invention relates to the technical field of submarine observation equipment, in particular to a pressure-balanced photoelectric separation device for main submarine base stations. The device includes a submarine cable, an armored steel wire fixing mechanism, a cable core sealing protection mechanism and an oil-filled tank body mechanism. The submarine cable includes an armored steel wire (1) and a submarine cable core (12). The submarine cable core (12) is wrapped with a PE insulating layer, and a copper conductor (13) and an optical fiber unit (16) are arranged inside the submarine cablecore (12). The armored steel wire fixing mechanism is in butt joint with the cable core sealing protection mechanism, and the cable core sealing protection mechanism is in butt joint with the oil-filled tank body mechanism. The submarine cable is inserted into the armored steel wire fixing mechanism, and passes through the cable core sealing protection mechanism to the inside of the oil-filled tank body mechanism. The copper conductor (13) is connected through electrical leading with an electrical cable cabin-penetrating part (15) arranged at the end of the oil-filled tank body mechanism. Theoptical fiber unit (16) is directly welded to an optical cable cabin-penetrating part (18). The problem that a submarine cable core creeps into a photoelectric separation cabin under the pressure of deep water is solved.
Owner:INST OF ACOUSTICS CHINESE ACAD OF SCI

Structure and method for controlling jointless abutment back subsidence and pavement cracking by using reinforcement geotextile

The invention relates to a structure and a method for controlling jointless abutment back subsidence and pavement cracking by using reinforcement geotextile. The bridge abutment of a jointless bridge is connected with an access board, backfill reinforced by multilayer reinforcement geotextile is arranged above the access board, backfill reinforced by multilayer reinforcement geotextile is also arranged under the access board, spacing is formed between the backfill reinforced by multilayer reinforcement geotextile and under the access board, and the wall body of the bridge abutment, an elastic material layer in the spacing is wrapped on the abutment back of the abutment, the wall body of the abutment is supported on a single rank of piles, the periphery of the single rank of piles is also wrapped by an elastic material layer, and the access board is obliquely arranged, and a discrete material layer is arranged at the tail end of the access board. With the reinforcement principle of the reinforcement geotextile and ingenious structural arrangement, a flexible structural layer with good overall integrity and higher rigidity is formed, so that the abutment back subsidence and pavement cracking of the jointless bridge are effectively controlled, the rigid-and-flexible stable transition of the road and bridge transition section is realized, and the structure and method are particularly applicable to jointless bridges with integral type abutments.
Owner:FUZHOU UNIV

Polymer saturated salt water drilling solution suitable for drilling gas storage warehouse

InactiveCN103642473AControlled dissolutionPrevent collapseDrilling compositionSodium BentoniteFiltration
The invention discloses a polymer saturated salt water drilling solution suitable for drilling a gas storage warehouse. The polymer saturated salt water drilling solution is prepared from brine glue solution and bentonite slurry with mass percentage concentration of 4% according to a mass ratio of 1:1, wherein the brine glue solution comprises the following components in parts by mass: 100 parts of brine, 0.3-0.35 part of drilling solution coating agent, 1.5-1.7 parts of sulfonated phenolic resin, 1-1.05 parts of high-viscosity sodium carboxymethylcellulose, 1.0-1.10 parts of compound salt resisting filtration loss reducing agent, 1.5-1.6 parts of drilling solution collapse-proof dilute filtration loss reducing agent SN (Sulfanilamide) resin, 1.0-1.05 parts of sulfonated bitumen, 0.3-0.4 part of sodium carbonate, 0.4-0.45 part of caustic soda and solid industrial salt NaCl which is added till the brine glue solution is saturated. Through the polymer saturated salt water drilling solution suitable for drilling the gas storage warehouse, the pollution problem of the upper stratum slurry and the lower calcium mudstone can be well controlled; and the polymer saturated salt water drilling solution is capable of effectively preventing the collapse of the stratum under the casing pipe shoe and has good effects of controlling dissolution of the salt layer and preventing creep deformation of the slat layer.
Owner:CNPC BOHAI DRILLING ENG
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