19 results about "Square Millimeter" patented technology

The invention relates to the technical field of metal wires, in particular to a low-voltage aluminum wire and a preparation method thereof, the sectional area of the wire is 35 square millimeters, the wire comprises an aluminum alloy conductor and an insulating layer, the aluminum alloy conductor comprises the following chemical components: 0.7-0.9% of magnesium, 0.4-0.6% of silicon, 0.15-0.25% of copper, 0.08-0.12% of zirconium, 0.05-0.09% of scandium, 0.03-0.07% of silver, 0.01-0.03% of erbium, 0.02-0.04% of vanadium and the balance of aluminum, and the microstructure of the aluminum alloy conductor is in gradient distribution. The center is ultra-fine grains, a transition region contains a nano precipitated phase, the surface layer is of a high-density dislocation and nano precipitated phase synergistic reinforcement structure, the insulating layer is of a double-layer composite structure, the inner layer is a crosslinked polyethylene modified layer, the outer layer is an ethylene-tetrafluoroethylene copolymer modified layer, the electric conductivity is improved to 58% IACS or above, and the tensile strength is improved to 280 MPa or above.

The present invention provides a production method for reducing the incidence of edge cracks of Q235 wide and thick slabs, comprising the following steps: (1) converter smelting, with an iron-steel ratio of 850 kg / t, and adding silicon-manganese alloy and ferrosilicon weak deoxidation during the steel tapping process; (2) adding fluorite, lime, calcium carbide, and Taiwan aluminum to LF for strong stirring to promote sufficient pre-melting of the slag, diffusion deoxidation, and then power supply to form white slag, with the LF outlet composition controlled as follows: C: 0.15-0.18%, Si: 0.15-0.30%, Mn: 0.55-0.65%, P≤0.035%, ALs: 0.007-0.015%, S≤0.010%; (3) continuous casting process :A. The cross-section of the slab casting machine is 300mm×2200mm, and the casting speed is 0.80m / min; B. An immersion nozzle with an outlet inclination angle of 12°, an area of ​​4500 square millimeters, and an insertion depth of 110-140mm is adopted; C. Low melting point, low alkalinity, and low viscosity mold slag is used to slow down heat transfer; D. Weak cooling is adopted for secondary cooling water distribution; E. The side taper of the crystallizer is 1.2%; F. The sum of the inner and outer arcs of the wide surface taper of the crystallizer is controlled at 1.6-2.4mm, and the inner and outer arcs are both controlled at 0.8-1.2mm. The method of the present invention can reduce the incidence of subcutaneous cracks on the edge of Q235 wide and thick slabs to below 1%.

silicon wafer (10) wherein the 50% threshold of a nanotopography within a 2 mm square spot having a size with a length in at least one direction of 2 mm and an area of ​​4 mm 2 exhibits 1.0 nm or less, and wherein the 50% nanotopography threshold is less than or equal to 0.4 times the 99.5% nanotopography threshold.

This specification discloses a piece of jewelry with an embedded NFC chip. The NFC-embedded jewelry provided in this specification includes a jewelry body, a groove, and an NFC coil. The groove is disposed at a designated position on the jewelry body, the designated position being one that minimizes the volume of metal contained within a designated space. The designated space is centered on the center of the groove, has the same shape as the groove, and has a larger volume than the groove. The NFC coil is disposed within the groove, the length of the shortest side of the surface containing the groove is greater than the diameter of the NFC coil by no more than 1.5 mm, the area of ​​the NFC coil is not less than 60 square millimeters, and the thickness of the NFC coil is less than the depth of the groove. When using the NFC-embedded jewelry designed in this specification, the NFC chip in the jewelry can have high communication sensitivity, and the damage to the NFC coil caused by the high-temperature packaging process can be effectively prevented.

This element (I) comprises a plate (1) made of a piezoelectric material which has, on the acoustic wave emission face, a first electrode (2) cooperating with a single connecting wire (4) and, on the opposite face (12), a second electrode (3) cooperating with two electrical connecting wires (5, 6) fixed on extensions (32, 34) of this second electrode. According to the invention, each wire (5, 6), cooperating with the second electrode (3) is such that the total geometric cross-section (π(D5)2 / 4) of the second wire is between 0.15 and 0.40 square millimeters (mm2), the diameter (d5) of each strand of this wire is between 0.035 and 0.060 millimeters (mm), and the total number of strands (n) is between 100 and 160. This combination of values ​​gives sufficient flexibility to the wire, thus reducing the mechanical stresses exerted at the junction between the strands and the brazing pad.This flexibility also allows the use of wires with small radial dimensions, ensuring use in an environment that promotes miniaturization. Figure for the abbreviation: [Fig. 5].

The present invention discloses a thermoplastic fiber filter material, which relates to the field of filter material technology. The material comprises a filter layer, a non-filter layer, and an intermediate fabric reinforcement layer. The surface of the filter layer contains nodes formed by melting thermoplastic fibers. The average node area is less than or equal to 0.02 square millimeters, the CV% of the node area is less than or equal to 40%, and the number of nodes distributed within any 1 square millimeter area is 5 to 20. Compared with traditional filter materials, the present invention has better filtering performance, lower manufacturing costs, and longer service life. It can achieve low-cost and low-emission effects and is suitable for various fields such as industrial dust removal and air filtration, with a broad prospect.

The application discloses a method for predicting rock mass structural plane contact characteristics based on an artificial neural network, and relates to the field of rock mass structural plane contact state measurement, and comprises the following steps: step 1, determining the uniaxial compression test of the structural plane to be predicted, and obtaining the contact condition of the structural plane by using pressure-sensitive paper; step 2, binarizing the obtained pressure-sensitive paper, packing the orthogonal one square millimeter of pixels, and respectively calculating the contact area ratio of each square millimeter; step 3, setting a reference threshold value, and defining as contact if the reference threshold value exceeds the set value, and vice versa; and step 4, performing preliminary processing on the point cloud of the upper and lower plates of the rock mass structural plane. The application estimates the contact condition of the structural plane based on the point cloud of the rock mass structural plane, the geometry and geometric parameters of the microconvex body on the structural plane can be more accurately described by using the point cloud to describe the appearance of the structural plane, and the precision can be selected according to actual requirements, and the calculation efficiency is improved.

This application discloses a sulfur-lead composite steel rod and its preparation method, as well as a steel pipe and soluble structural components, solving the technical problem that soluble bridge plugs in the prior art do not meet the high-pressure maintenance requirements of deep wells. The steel rod comprises the following chemical composition in parts by mass: Fe: 90-97.5 parts, C≤0.6 parts; S: 0.1-0.6 parts, Mn: 0.50-3.00 parts, Pb: 0.2-0.3 parts, O: 0.0010-0.0200 parts; the steel rod has composite inclusions; the composite inclusions include an inner core and a continuous or discontinuous outer shell distributed around the inner core, the inner core including manganese sulfide particles, and the outer shell including first lead particles; the steel rod includes a first region, a second region, and a third region arranged sequentially from the inside out; the average equivalent diameter of the composite inclusions in the first region is larger than that in the second region; the number of composite inclusions per square millimeter in any cross-section of the third region is greater than that in the second region. The sulfur-lead composite steel rod provided by this application has high strength and meets the high-pressure maintenance requirements of deep wells.

A cartridge (10) for use in an aerosol-generating device (600), the cartridge (10) comprising: a housing (100) having an inlet (110) and an outlet (120) and a chamber (400) extending between the inlet (110) and the outlet (120); a heating element (200) for heating the aerosol-forming substrate to form an aerosol, the heating element (200) extending into the chamber (400); the chamber (400) comprises a first portion (410) on a first side of the heating element (200) and a second portion (420) on a second side of the heating element (200); and an aerosol-generating substrate (300) disposed within at least one of the first portion (410) and the second portion (420). The cross-sectional area of the heating element (200) in the plane in which the heating element (200) extends is between 60 square millimeters and 90 square millimeters. The cross-sectional area of the chamber (400) in the plane in which the heating element (200) extends is between 150 and 250 square millimeters. The ratio of the cross-sectional area of the heating element (200) in the plane in which the heating element (200) extends to the cross-sectional area of the chamber (400) in the plane in which the heating element (200) extends is at least 0.3.

A thermodynamic heating device (1) comprising: a tank (2) having an internal volume (4), an inlet port (6), an outlet port (8) and an external tank surface (3), a heat pump (10) comprising a tube (20) wound around the external tank surface (3), said tube (20) having an internal tube surface (22) and an external tube surface (24), the internal tube surface (22) delimiting a passage (25) and the external tube surface (24) having an external flat portion (24a) in contact with the external tank surface (3), the passage (25) having a cross-section having the following characteristics: an area (A) less than 35 square millimeters, the external flat portion (24a) extends over a contact length (d) greater than 5 millimeters, and a ratio between the area (A) and the contact length (d) is less than 2 millimeters. Figure for the abbreviation: Figure 2

The present invention provides a rotary compressor for rapid freezing appliances. The rotary compressor can be used to charge a refrigerant selected from one of either R1270 or R290. The rotary compressor includes a pump, a ring and a shaft. The pump includes an upper support, a cylinder, a lower support and vanes. The cylinder has a suction port used to draw in refrigerant. The upper support has a discharge port used to discharge refrigerant. The discharge port has a depth not more than 2 millimeters and an effective area between 28 square millimeters and 51 square millimeters. The ring has a height-to-radius ratio between 1.4 and 1.7. The shaft can be rotated relative to a first longitudinal axis of the pump to enable the ring to rotate relative to the pump.

This utility model belongs to the field of coupling manufacturing technology, specifically relating to a novel load-bearing flexible coupling, including an upper shaft hole, a lower shaft hole, and a flexible connecting sleeve. The upper shaft hole is used to install the shaft head of the driving component, and the lower shaft hole is used to install the shaft head of the driven component. The flexible connecting sleeve connects the upper shaft hole and the lower shaft hole, and the upper shaft hole, flexible connecting sleeve, and lower shaft hole are integrally formed. This novel load-bearing flexible coupling, through optimized structural design, especially the use of a flexible connecting sleeve of specific size and shape, achieves a bending area of ​​15 square millimeters, a bending strength of 785 MPa, and a maximum service strength of 47 nm, enabling it to stably transmit large loads and effectively broadening the application range of flexible couplings.

The simulated feather special for the badminton comprises a feather piece (1) and a feather stem (2), the feather piece (1) further comprises two sheets (11), the feather stem (2) is completely or partially wrapped between the two sheets (11), at least one sheet is made of foaming materials, and the feather stem (2) is completely or partially made of bamboo materials. The feather stem (2) is made of a first layer of bamboo chips on the outer side of bamboo wood. The feather stem segment (221) on the upper half portion of the feather stem (2) is the key point of weight control, and the area of the cross section of the feather stem segment (221) ranges from 0.5 square millimeter to 1.3 square millimeters within the 75% length range of the feather stem segment (221). The bamboo materials are subjected to agent or resin permeation treatment or surface treatment. The feather stem (2) further comprises a structure reinforcing portion (21) made of plastic materials, and the structure reinforcing portion (21) wraps part of the feather stem (2) in a base body of the feather stem (2). The utility model further relates to the shuttlecock made of the special simulation feather for the shuttlecock.

The invention relates to the technical field of metal fatigue, in particular to a quantitative evaluation method for the effect of residual stress on fatigue crack propagation, which comprises the following steps: carrying out surface strengthening treatment on a sample; residual stress distribution in the depth direction of the surface strengthening treatment area of the sample is measured; performing a crack propagation test on the sample, and measuring and calculating crack propagation rates under different crack lengths; determining crack tip extension energy density according to a metal fatigue theory; wherein the crack tip extension energy density is crack extension energy provided for the crack tip by a far-field load in unit square millimeter; and according to the crack tip extension energy density, the crack extension driving energy density and the crack extension inhibition energy density are determined. The quantitative evaluation method for the action of the residual stress on the fatigue crack propagation aims to solve the problem that the quantitative evaluation of the action of the residual stress on the fatigue crack propagation is difficult.

Implementations of the present disclosure may include a non-hormonal contraceptive, including a body formed of one or more non-porous, biocompatible materials. In some implementations, the body has a length in a range from 1 centimeter to 31 centimeters. In some implementations, the body has a width in a range from 0.5 centimeters to 10 centimeters. Various implementations may also include a copper inlay on the body, the copper inlay having an exposed surface area in a range from 200 square millimeters to 1000 square millimeters.

The present invention provides a rotary compressor for rapid freezing appliances. The rotary compressor can be used to charge a refrigerant selected from one of either R1270 or R290. The rotary compressor includes a pump, a ring and a shaft. The pump includes an upper support, a cylinder, a lower support and vanes. The cylinder has a suction port used to draw in refrigerant. The upper support has a discharge port used to discharge refrigerant. The discharge port has a depth not more than 2 millimeters and an effective area between 28 square millimeters and 51 square millimeters. The ring has a height-to-radius ratio between 1.4 and 1.7. The shaft can be rotated relative to a first longitudinal axis of the pump to enable the ring to rotate relative to the pump.

An aviation propulsion system (1) comprises a high-pressure compressor (5) having an average outer radius satisfying formula (I) # imgabs0 # wherein: Rext5 is the average outer radius of the high-pressure compressor (5) in millimeter (mm), Rext2 is the average outer radius of the high-pressure compressor (5), Rext3 is the average outer radius of the high-pressure compressor (5) in millimeter (mm); d9 is the diameter of the fan rotor (9), and the unit is millimeter (mm); bPR is the bypass ratio of the propulsion system (1); te is the maximum temperature at the inlet of the first turbine (8) when the propulsion system (1) is stationary and in a takeoff mode, in degree Celsius (DEG C); n is the rotational speed of the second shaft (10) in rotational speed per minute (tr / min), and N is measured when the propulsion system (1) is stationary and in takeoff mode; s7 is the average surface of the second turbine (7) in square millimeters (mm2); and A = 1 (trr / min) 2 mm / DEG C and B = 8977 (trr / min) 2 * mm2.

The present invention relates to the technical field of metal wires, and in particular to a low-voltage aluminum wire and a preparation method thereof. The wire has a cross-sectional area of ​​35 square millimeters and comprises an aluminum alloy conductor and an insulating layer. The aluminum alloy conductor has a chemical composition comprising 0.7-0.9% magnesium, 0.4-0.6% silicon, 0.15-0.25% copper, 0.08-0.12% zirconium, 0.05-0.09% scandium, 0.03-0.07% silver, 0.01-0.03% erbium, 0.02-0.04% vanadium, and the remainder being aluminum. The microstructure of the low-voltage aluminum wire is gradient distributed, with ultrafine grains in the center, nano-precipitated phases in the transition region, and a surface layer having a synergistic reinforcement structure of high-density dislocations and nano-precipitated phases. The insulating layer is a double-layer composite structure, with an inner layer being a cross-linked polyethylene modified layer and an outer layer being an ethylene-tetrafluoroethylene copolymer modified layer. The electrical conductivity is increased to above 58% IACS, and the tensile strength is increased to above 280 MPa.

The present disclosure relates to a steel material for an ultra-thick structure having excellent surface portion NRL-DWT performance and a manufacturing method thereof, and more particularly to a steel material for an ultra-thick structure and a manufacturing method thereof, the steel material comprising, in weight %, C: 0.05 to 0.09 %, Si: 0.1 to 0.4 %, Al: 0.01 to 0.05 %, Mn: 1.8 to 2.0 %, Ni: 0.3 to 0.7 %, Nb: 0.015 to 0.040 %, Ti: 0.005 to 0.02 %, Cu: more than 0 % and 0.05 % or less, the balance of Fe and other inevitable impurities, and the number of micro cracks having a length of 50 μm or more per square millimeter in a region from a surface portion to 5 mm directly below the surface portion is 0.1 or less.