82results about How to "Avoid performance changes" patented technology

There is provided a rotating electric machine capable of preventing a coolant from being retained at an outer surface of a rotor. This rotating electric machine includes a rotation shaft provided so as to be rotatable, a core body secured to the rotation shaft, a permanent magnet embedded in the core body, and an end plate provided so as to be opposed to an axial end surface of the core body. A first coolant channel is formed in the rotation shaft to allow a coolant to flow therethrough. A second coolant channel is formed between the end plate and the axial end surface of the core body to communicate with the first coolant channel. A partition wall that partitions the second coolant channel in a circumferential direction and a path wall that guides the coolant in the second coolant channel toward an outer peripheral edge region of the axial end surface where the permanent magnet is placed are formed inside the second coolant channel.

A control device for a motor-driven vehicle, the control device includes: a zone determining unit that determines at least a normal use zone, a discharge zone, an over-discharge zone, a charge zone, and an over-charge zone; and a control unit controlling the motor by stipulating the charge and discharge power of the storage unit for each zone that is determined by the zone determining unit, setting the normal use zone to be in a predetermined range that includes a remaining capacity at which the discharge output according to the remaining capacity of the storage unit and the charge input according to the remaining capacity of the storage unit are equivalent, and making the discharge output and the charge input in the normal use zone to be a predetermined value regardless of the remaining capacity of the storage unit in the zone.

The invention discloses a full-automatic submerged-arc welding solid-core welding wire for high-manganese steel for preparing an LNG storage tank. According to the technical scheme, the full-automatic submerged-arc welding solid-core welding wire comprises 0.25-0.45wt% of C, 23-26wt% of Mn, 6-8wt% of Ni, 3-5wt% of W, 0.02-0.04wt% of N, less than or equal to 0.02wt% of P, less than or equal to 0.001wt% of S and the balance of Fe and inevitable impurities. The full-automatic submerged-arc welding solid-core welding wire has the advantages that the price of adopted alloy elements is low, and an alloy component system is simple; and the low-temperature toughness of weld metal formed by the prepared full-automatic submerged-arc welding solid-core welding wire is excellent, the strength of the full-automatic submerged-arc welding solid-core welding wire is matched with the strength of the ultralow-temperature high-manganese steel for preparing the LNG storage tank, and the technical requirements for the strength and the ultralow-temperature toughness of the welded LNG storage tank can be met.

The invention discloses a preparation method of a zeolite geopolymer cementing material. The method comprises the following steps: (1), preparing a silicon-aluminum mixture; (2), preparing an alkalineactivator; and (3), preparing a zeolite geopolymer cementing material. According to the geopolymer cementing material, metakaolin, zeolite, red mud, coal ash, magnesium oxide and other raw materialsare reasonably utilized, so that activation reaction of all the material components is improved; alkali metal ions are firmly combined in a reaction product, and the surface frosting problem can be slightly relieved. The prepared zeolite geopolymer cementing material is high in strength and high in hardening speed, and the 28-day strength can reach over 48 MPa. Magnesium oxide in the raw materialsplays a role of a filling and expanding agent and can effectively absorb carbon dioxide. By optimizing the proportion, the geopolymer is more excellent in corrosion resistance by being compared withordinary Portland cement, small in capillary pore number, good in impermeability, small in shrinkage, high in setting speed and high in applicability, and the sustainable development requirements of ecological environmental protection can be met.

The invention provides a power battery pack with reliable connection and excellent electric power output performance, comprising: a plurality of single batteries (5), which are interconnected in serial or parallel via flaky electrode terminals (1, 2), wherein the electrode terminals (1, 2) are interconnected via an intermediate connector (3) with the function of buffer, and the connection relationship between the electrode terminals (1, 2) and the intermediate connector (3) is adherence connection. The intermediate connector (3) with the function of buffer can buffer stress when the electrode terminals (1, 2) receive load impact, thereby guaranteeing the reliable connection between the electrode terminals (1, 2). In addition, according to the invention, the power battery pack can include the function of automatic disconnection upon overheating by manufacturing the intermediate connector (3) with memory alloy material or in a structure of double metal sheets. The power battery pack is mainly applied to electric/hybrid cars.

The invention provides a polyamide reverse osmosis membrane and a preparation method thereof. The membrane comprises a porous support membrane and a carbon quantum dot-containing polyamide layer growing on the surface of the porous support membrane, and the carbon quantum dot-containing polyamide layer comprises the following raw material components: aminated carbon quantum dots, an oil-phase reaction monomer, an oil-phase solvent, an acid acceptor, a pH regulator and a surfactant; the preparation method comprises the following steps: 1, preparing aminated carbon quantum dots; and 2, preparingthe polyamide reverse osmosis membrane. According to the polyamide reverse osmosis membrane disclosed by the invention, the aminated carbon quantum dots are used as a novel water-phase reaction monomer, and a polyamide layer structure containing the carbon quantum dots is formed on the polysulfone porous support membrane by directly carrying out a cross-linking reaction on amino groups on the aminated carbon quantum dots and trimesoyl chloride, so that the water flux can be improved from multiple aspects.

A worm wheel of a worm drive includes an annular synthetic resin member having tooth portions meshing with a worm shaft and a core having an outside diameter portion joined to an inside diameter portion of the synthetic resin member. The outside diameter portion of the core has first joining tooth portions that protrude outward in a radial direction and are joined to the inside diameter portion of the synthetic resin member. Each of the first joining tooth portions includes a widening portion whose width in a circumferential direction increases toward the outside in the radial direction.

The invention relates to a limited current type oxygen sensor which comprises an electrolyte layer and a compact diffusion barrier layer. The electrolyte layer and the compact diffusion barrier layer are both made of La1-xSrxGal-yMgyO3-delta, wherein 0.1<=x<=0.2, 0.1<=y<=0.2, and 0.1<=delta<=0.2. The sensor has good long-term stability.

The invention discloses an ultra-low frequency vibration isolator and a design method thereof. The ultra-low frequency vibration isolator comprises a vibration isolation bearing platen, an upper shell, a lower shell, a bearing rod, a positive rigidity spring and a negative rigidity magnetic spring; and the bearing rod, the upper shell and the lower shell are coaxial, and the vibration isolation bearing platen is arranged on the top end of the bearing rod. The ultra-low frequency isolator and the design method can meet the requirements of the vibration isolator for the bearing capacity and the ultra-low inherent frequency; and meanwhile, the isolator can maintain the linear stiffness characteristic near a working point, so that the restriction to the vibration amplitude and the isolator performance is eliminated, and the excellent low-frequency vibration isolation performance is achieved.

The invention discloses a seamless submerged arc flux-cored wire for welding a high manganese steel LNG storage tank. The seamless submerged arc flux-cored wire is composed of outer skin and flux-cored powder. The flux-cored powder accounts for 30-40wt% of the total weight of the wire. The flux-cored powder comprises the following components in parts by weight: 75-85 parts of manganese metal, 4-8parts of chromium carbide, 1-3.5 parts of chromium metal, 3-5 parts of molybdenum metal, 0.5-1.5 parts of silicon iron, 1-2 parts of ferrotitanium, 0-8 parts of iron powder, 0.5-1 part of aluminum oxide and 0.5-1 part of fluorite. The flux-cored wire is good in manufacturability, excellent in toughness at 196 DEG C below zero, low in cost and suitable for welding the high manganese steel LNG storage tank.

The invention provides a biodegradable spinning material and a preparation method and application thereof and belongs to the technical field of biodegradable materials. The biodegradable spinning material comprises the following preparation raw materials including, by mass, 80-93 parts of chemical-modified PBAT (Poly(butylene adipate terephthalate)), 1-8 parts of PCL (polycaprolactone), 0.5-2 parts of silver nanowire emulsion, 3-11 parts of functional master batch and 0.05-0.2 part of degradation balancing agent, wherein the weight-average molecular weight of the chemical-modified PBAT is 16000 to 38000, and the mass content of silver nanowires in the silver nanowire emulsion is 45% to 60%. The spinning material provided by the invention has the good spinnability and the good strength and is biodegradable, the degradation process can be effectively controlled according to the using requirements of people, a product obtained through spinning of the spinning material is good in breathability and anti-bacterial property, and a certain blocking effect is achieved in terms of clothing materials.

The invention provides a liquid RFID antenna comprising at least a loop antenna portion and a liquid metal antenna portion. The loop antenna portion is disposed on a first dielectric substrate. The loop antenna portion includes an inner loop antenna portion and an outer loop antenna portion. The liquid metal antenna portion is disposed in a second dielectric substrate. An interface between the inner loop antenna portion and the outer loop antenna portion on the first dielectric substrate is electrically connected to an electronic chip. The application provides a new mode for cyclic wire arrange in combination with the liquid metal antenna, expands the compatibility of RFID in multiple occasions, satisfies the electrical performance of the antenna while ensuring the soft characteristics, and provides an ingenious backup improvement scheme to greatly improve the satisfaction of the RFID in different scenarios.

A method for manufacturing a composite semipermeable membrane is capable of forming, on a surface of a porous support in a highly reproducible manner, a separation layer that is extremely thin and that exhibits superior separability. It provides, on a surface of a porous support, a composite semipermeable membrane that has an organic/inorganic hybrid separation layer that is extremely thin and that exhibits superior separability. A method for manufacturing a composite semipermeable membrane includes forming, on a surface of a porous support, a separation layer containing a cross-linked condensate having a siloxane bond by bringing an organic solution that contains an organic silicon compound containing three or more reactive functional groups, each of which is at least one type selected from a hydrolyzable group and a hydroxyl group, into contact with water or an aqueous solution on the porous support, and by performing interfacial polycondensation of the organic silicon compound.

The invention discloses an adhesive flow testing device. The device comprises a base, a protection cover, a detection chamber, a display panel, a humidifying device, a drying device, a detection device and a control device, wherein the detection chamber is defined by toughened glass plates and a base; operation holes and rubber gloves are arranged on one toughened glass plate; the control device controls the humidifying device and the drying device to work; the detection device is placed in the detection chamber; the humidifying device, the drying device and the control device are placed in achamber defined by the base and the protection cover. The invention further discloses a testing method adopting the adhesive flow testing device. As a movable miniature detection chamber, the cost forproviding the required detection environment is much lower than that for controlling the laboratory environment, and materials can be drawn from the production line at any time for detection at any time; the provided detection device can detect fluidity of the adhesive on line; operators can be protected from harm caused by volatile substances of adhesives.

The invention relates to a gas metal arc welding flux-cored wire used for ultralow-temperature high-manganese steel. According to the technical scheme, the gas metal arc welding flux-cored wire used for the ultralow-temperature high-manganese steel is composed of 65-70 wt% of a steel strip and 30-35 wt% of flux core powder; the steel strip comprises the following chemical components: 0.10-0.20 wt% of C, 0.01-0.05 wt% of Si, 3-7 wt% of Mn, less than or equal to 0.002 wt% of P, less than or equal to 0.001 wt% of S, and the balance Fe and inevitable impurities; and the flux core powder comprises the following chemical components: 28-34 wt% of rutile, 2-4 wt% of zircon sand, 2-4 wt% of potassium titanate, 20-25 wt% of electrolytic manganese, 8-15 wt% of nickel powder, 8-12 wt% of high-carbon ferro-chrome, and the balance iron powder. According to the gas metal arc welding flux-cored wire used for the ultralow-temperature high-manganese steel, all-position welding can be achieved, and the welding efficiency is high; and formed weld metal is good in forming, low in pore sensitivity and excellent in low-temperature toughness, and the strength matches that of the ultralow-temperature high-manganese steel.

In a method of manufacturing a semiconductor pressure sensor, a multilayer structure including a polysilicon diaphragm, a polysilicon gauge resistor formed on a side of a space which is to serve as a vacuum chamber below the polysilicon diaphragm, and a group of insulating films containing the polysilicon diaphragm and the polysilicon gauge resistor and having an etching solution introduction hole in contact with a sacrificial layer is formed on the sacrificial layer. Then, an etching solution is supplied through the etching solution introduction hole and the sacrificial layer is etched with the etching solution, to thereby obtain a diaphragm body formed of the multilayer structure, which functions on the vacuum chamber, and a surface of a silicon substrate below a first opening of a first insulating film is etched to thereby form the space which is to serve as the vacuum chamber and a diaphragm stopper disposed in the space, protruding toward near the center of the diaphragm body. With this structure, it is possible to provide a technique for suppressing the variation in the performance of a semiconductor pressure sensor when the semiconductor pressure sensor is downsized.