276 results about "Beryllium-Aluminium Alloy" patented technology

A wire conductor for a wiring harness includes a stranded wire obtained by twisting strands around a core wire. The core wire is composed of beryllium copper and the strands twisted around the core wire are composed of annealed copper. Preferably, the wire conductor includes a stranded wire obtained by twisting 6, 12 or 18 strands around the core wire. Half of the strands twisted around the core wire are composed of beryllium copper, the remaining strands and the core wire are composed of annealed copper, and the strands composed of beryllium copper and the strands composed of annealed copper are alternately arranged around the core wire. The wire conductor has sufficient conductivity and strength, causes no disconnection even when produced in a small diameter, and has appropriate flexibility.

The invention relates to a low temperature scanning probe microscope system based on pulse tube refrigeration technology. Aimed at vibration source and characteristics, a multistage active / passive damping device, including a sylphon bellowss, a piezoelectric ceramic tube and a spring are adopted. The sylphon bellowss is used for connecting a main system cavity and a refrigeration head of the pulse tube to realize vibration isolation of the whole system. As for low frequency vibration unique to a pulse tube refrigerator, an active damping device with a piezoelectric ceramic tube and a digital signal processor as the core is adopted. A beryllium copper spring and a damping magnet form a first stage passive damping device to isolate vibration. The system eliminates the vibration from the pulse tube refrigerator and the refrigeration head to the scanning probe, applies to other vibration sensitive occasions that require low temperature, saves a large amount of liquid helium refrigerant, simplifies equipment operation and maintenance, and significantly prolongs the retention time at low temperature.

The invention relates to a rapid direct-current deicing short circuit device of an electric transmission line and belongs to the technical field of electric power line device fittings. According to the structure, the rapid direct-current deicing short circuit device of the electric transmission line comprises a short circuit cable (1). The two ends of the short circuit cable (1) are respectively connected with one line hanging connection clamp. One end of an upper clamping block (2) of each line hanging connection clamp and one end of a lower clamping block (3) of the line hanging connection clamp are movably connected through a hinge, the other end of each upper clamping block (2) is provided with an upper semi-tile combined beryllium copper sleeve (5), and the other end of each lower clamping block (3) is provided with a lower semi-tile combined beryllium copper sleeve (6), wherein the upper semi-tile combined beryllium copper sleeve (5) and the lower semi-tile combined beryllium copper sleeve (6) are matched with the overhead line in diameter. The two ends of the short circuit cable (1) are respectively connected with a downward-convex conductive block (7) in a rapid screwing mode through an internal-thread clamping connector (8). The lower end of each pull rod (4) is square and is connected with the middle of one lower clamping block (3) through a shotpin mechanism. According to the rapid direct-current deicing short circuit device of the electric transmission line, the line hanging connection clamps are connected to two overhead lines which are erected in parallel, a large current power source is loaded between adjacent phases of the overhead lines, heat generated through a resistor of the overhead aluminum conductors is utilized, so that attached ice is rapidly deiced and eliminated, and adjacent phase connection can be rapidly and conveniently conducted. The rapid direct-current deicing short circuit device of the electric transmission line has the advantages of being capable of saving labor, short in time, rapid in installation, convenient to install, and firm.

The invention relates to a rotary power supply converter, popularly an electric turntable. The electric turntable mainly uses strong-elasticity beryllium copper to produce conductive connecting pieces, and in a round platform shaped insulating shell, two flaky conducting rings fixed on an upper insulating supporting plate and connected with an electric load are in double-sided occlusion rotary sliding friction active electrical connection with two flaky conducting slip rings fixed on a lower insulating supporting plate and connected with a power supply through six groups of dual-conductive connecting pieces respectively. Because the conductive connecting pieces, the conducting rings and the conducting slip rings are flaky and are hung in the air and horizontally placed on a middle horizontal line between the upper insulating supporting plate and the lower insulating supporting plate, and together with an ultra-thin center positioning turntable and an pressure-bearing steel ball in an R groove, the rotary power supply converter strides forward into the ultra-thin field in design. Thus, the product is portable and convenient, and can be matched with a dining table in use independently to form a rotary electric hot pot table. Simultaneously, the rotary power supply converter can be widely applied to theatrical stages and industrial and agricultural productions so that the rotary power supply conversion steps into a new step.

The invention relates to a preparation method of a high beryllium copper alloy strip material short process for a dynode of a photomultiplier, and relates to a preparation method of the beryllium copper alloy strip. The problems that the mass fraction of beryllium in an existing beryllium copper strip is low, the porosity of a beryllium copper strip is large, the compactness of a structure is poor, macroscopic segregation is generated and production efficiency is low are solved; the method comprises the following steps that 1, semi-continuous preparation is carried out to prepare a blank; 2, extrusion is carried out; 3, rolling and acid pickling are carried out; and 4, finish rolling, annealing and winding are carried out to obtain the high beryllium copper alloy strip for the dynode of the photomultiplier. According to the method, a peak secondary electron emission coefficient of the high beryllium copper alloy strip for the dynode of the photomultiplier prepared by the method is 8.4-10.8, the tensile strength is 645.4 MPa-670.2 MPa, the yield strength ranges from 314.8 MPa-360.9 MPa, and the percentage elongation after fracture is 15%-19%; and the high beryllium copper alloy strip for the dynode of the photomultiplier can be obtained.