8 results about "Low stress" patented technology

An electric cable for power transmission at low voltage has at least one conductor and an insulating coating surrounding the at least one conductor. The insulating coating has at least two insulating layers. In a radial direction from the inside toward the outside of the electrical cable, the insulating coating has at least one insulating layer made of a non-expanded polymeric material and at least one insulating layer made of an expanded polymeric material.

The invention discloses a circuit for a low-voltage adjustable band-gap reference source. Collectors and bases of three PNP triodes are grounded; the emitter of the first PNP triode is connected with one end of a first resistor; the other end of the first resistor is connected with the positive input end of an operational amplifier and the drain of a first P-channel metal oxide semiconductor (PMOS) transistor; the emitter of the second PNP triode is connected with the negative input end of the operational amplifier and the drain of a second PMOS transistor; the emitter of the third PNP triode is connected with one end of a second resistor; the other end of the second resistor is connected with the drain of a third PMOS transistor and one end of a third resistor; the other end of the third resistor is grounded; the output end of the operational amplifier is connected with the grids of the three PMOS transistors; and the sources of the three PMOS transistors are connected with a power supply. According to the circuit, configurable reference output voltage can be realized; and the influence of offset voltage of the operational amplifier on a starting circuit is avoided.

A substrate is provided and a plurality of trenches are formed in the front surface of the substrate. Then, a thermal oxide layer is formed on inner walls of the trenches and the front surface of the substrate. Subsequently, a first structural layer is formed on the thermal oxide layer, dopants are implanted into the first structural layer, a second structural layer is formed on the first structural layer, and an annealing process is performed to reduce the stress of the first and second structural layers. Following that, the first and second structural layers are patterned to form diaphragms. Finally, the second structural layer is mounted on a support wafer with a bonding layer, and the back surface of the substrate is etched by deep etching techniques to form back chambers corresponding to the diaphragms. Each back chamber has a vertical sidewall and partially exposes the first structural layer.

The invention discloses a low pressure drop check valve. The low pressure drop check valve comprises a tubular valve body and a valve clack. A lug is arranged on one end of the upper surface of the valve clack; the lug is connected to a bracket rod arranged on the upper wall of an inner cavity of the valve body through a horizontally arranged pin roll; the axis of the pin roll is vertical to a vertical plane of the axis of the valve body; a valve clack seat is arranged in the inner cavity of the valve body; the outer edge of the valve clack seat is hermetically connected to the wall of the inner cavity of the valve body in a surrounding manner; a through hole is formed in the middle of the valve clack seat; the valve clack rotates around the pin roll to hermetically close or open the through hole; the plane of the valve clack seat inclines to the horizontal plane of the axis of the valve body and is vertical to the vertical plane of the axis of the valve body; and the valve clack seat inclines toward the inlet end of the valve body. Compared with the prior art, the low pressure drop check valve disclosed by the invention has the advantages of simple and compact structure and good sealing property, and can be quickly opened when the front and back pressure difference of the valve is smaller.

A smart part comprising: a body, manufactured by a three dimensional (3D) additive manufacturing (AM) process, having high-stress and low-stress sections, wherein when the smart part is in operational use the high-stress section is subjected to higher stress than the low-stress section; a resistive strain gauge embedded within the body during the AM process at the high-stress section, wherein the strain gauge is configured to produce a variable output; and a temperature sensor embedded within the body during the AM process at the low-stress section, wherein the temperature sensor is configured to produce a variable output based on temperature.

The invention relates to a steel pulling strip fixing structure for a transformer. An insulating washer, a steel washer and a butterfly spring are sequentially arranged at one end of two ends, connected with high/low pressure upper/lower clamping pieces, of a steel pulling strip body and arranged from the mounting surface of the outer side of a pulling strip mounting plate; a steel washer and a butterfly spring are arranged at the other end; the mounting surface of the outer side of the pulling strip mounting plate directly contacted with the steel washer is not coated with a coating film; a notch is milled in the neck part of a pulling strip fastening bolt on one side where the insulating washer is mounted, and the notch is wound with an insulating tape. The flux leakage influence can be reduced, loss of a structural member is reduced, and the condition that short-circuit accident of an iron core is caused by a steel pulling strip due to the fact that pulling strip insulation ageing is accelerated as a result of local overheating is prevented. Meanwhile, reliable electrical communication between one side of the steel pulling strip and high/low pressure upper/lower clamping pieces can be guaranteed, discharge to the iron core due to the fact that two ends of the steel pulling strip are completely insulated and blocked in a high-leakage magnetic field and suspension electric potential is formed is prevented, insulated electrical breakdown is avoided, and safe and reliable operation of a transformer product is guaranteed.