53results about How to "Cheap manufacturing" patented technology

The invention discloses a method for preparing formaldehyde through photocatalytic methane selective oxidation, and relates to the technical field of formaldehyde preparation. The method comprises the following steps: ultrasonically dispersing a titanium dioxide supported copper monatomic catalyst into water, adding into a reaction kettle, sequentially introducing oxygen and methane into the reaction kettle until the required pressure is reached, and stirring and reacting for a period of time under an illumination condition to obtain formaldehyde and other oxidation products, in the reaction process, the dosage of the titanium dioxide supported copper monatomic catalyst is 0.1-10 mg, and the dosage of the water solvent is 0-100 mL; the catalyst is a titanium dioxide supported copper monatomic catalyst. According to the method, methane is used as a raw material, oxygen is used as an oxidizing agent, methane is selectively converted into formaldehyde under the combined action of illumination and the titanium dioxide supported copper monatomic catalyst, the obtained formaldehyde has high generation rate and selectivity, the reaction process is green and economical, and the method has wide application prospects.

A conduit (10) for a fluid to be conveyed, in particular in a motor vehicle, comprises an inner tube (12) configured to be passed through by the fluid to be conveyed and a sheath (15). The sheath (15) includes an outer tube (14) and a plurality of tubular portions (18) defining a channel (16). Tubular portions (18) are inserted radially between the inner tube (12) and the outer tube (14), extend longitudinally along the outer tube (14), are integral with the outer tube (14), and are spaced apart from each other to form a void (17). The application also relates to a system for conveying a fluid and a motor vehicle.

The invention discloses a preparation method of a BAW device based on a novel sacrificial layer technology, and the preparation method employs ZnO as the material of a sacrificial layer, employs a diluted hydrochloric acid solution as an etchant solution, can prevent the diluted hydrochloric acid solution from corroding an insulating layer and a dielectric layer while completely corroding ZnO, and obtains a high-performance BAW device. And meanwhile, on-chip integration with other passive devices is realized. According to the invention, ZnO is adopted as the sacrificial layer, and the sacrificial layer has the same wurtzite structure as the piezoelectric layer, so that the sacrificial layer can be used for inducing grain arrangement of the first electrode of the piezoelectric oscillation stack, and preferred orientation growth of the first electrode film is facilitated, so that preferred orientation growth of the piezoelectric layer film is further realized, and the piezoelectric layer film has relatively good piezoelectric performance. According to the invention, SiO2 is used as a passivation protection layer and an insulating layer, so that the function of the passivation protection layer and the insulating layer is achieved, and the function of temperature compensation can be additionally realized at the same time.

The present application belongs to the technical field of biological oil catalytic hydrogenation, and particularly relates to a bio-based oil-soluble molybdenum catalyst, a preparation method and application thereof. The preparation method of the bio-based oil-soluble molybdenum catalyst provided by the present application comprises: mixing a molybdenum source, a bio-based linear organic acid with a carbon atom number of 16 or more and an additive, heating and reacting, and separating to obtain the bio-based oil-soluble molybdenum catalyst; the additive is selected from at least one of tetrahydro naphthalene and decahydro naphthalene. The bio-based oil-soluble molybdenum catalyst green material obtained by the present application has optimal activity and high dispersibility when used, can realize more sufficient mixing with raw materials, forms nano high-dispersed molybdenum sulfide through sulfuration, and realizes high-efficiency hydrogenation refining of oil products through the joint action of hydrogen and sulfur, while reducing the sulfur, oxygen and metal residues in the product oil.

A peritoneal dialysis (PD) container is provided, comprising an injection-stretch blow-molded container body, an injection site, and a pop-out outlet valve. The PD container can be included in a PD treatment system, which also includes a coil, a patient connector, and a drainage bag. All these components are made of a polyolefin material. In an alternative embodiment, a two-piece outlet delivery device comprising an outlet base insert and a peelable tube can be used instead of the pop-out outlet valve. Kits for the PD treatment system are also provided.

The present invention relates to a sulfuric acid production device provided with: a line (41) for supplying a raw material containing at least a sulfur component; a conduit (45) into which the first refrigerant is introduced; a combustion furnace (51) that combusts the starting material and generates a combustion gas containing sulfur oxides; a waste heat boiler (52) that cools the combustion gas by heat exchange with the first refrigerant that has been heated; a converter (61) for generating a reaction gas containing sulfur trioxide and water by oxidizing the sulfur oxide with a catalyst; a cooler (62) that cools the reaction gas by heat exchange with the second refrigerant; a dilute sulfuric acid tower (71) for absorbing sulfur trioxide and water contained in the cooled reaction gas into the sulfuric acid aqueous solution to generate dilute sulfuric acid, and discharging an exhaust gas containing sulfur dioxide and oxygen; and a heat exchange means (63) for preparing a heated first refrigerant and a cooled second refrigerant by heat exchange between the heated second refrigerant and the first refrigerant, and supplying either the heated first refrigerant or the cooled second refrigerant to the waste heat boiler (52).

The invention relates to intelligent dyeing production equipment based on cooperation of an electric control box, the intelligent dyeing production equipment comprises a bottom plate and an electric control box body, four corners of the bottom of the bottom plate are respectively connected with support columns, a dyeing box is arranged above the bottom plate, four corners of the bottom of the dyeing box are respectively connected with stand columns, and the bottom ends of the stand columns are connected to the top of the bottom plate. A movable door is installed at the position, close to the top, of the right side of the dyeing box, material penetrating grooves are formed in the front side and the rear side of the dyeing box correspondingly, a U-shaped plate is arranged in the dyeing box, a pulling roller is movably connected to the inner wall of the U-shaped plate through a rotating shaft and a bearing, and an electric push rod is connected to the top of the dyeing box in a penetrating mode. According to the technical scheme, the whole structure is compact, an external circulating pump, a complex pipeline and an independent aeration system are omitted, the manufacturing and maintenance cost and energy consumption are reduced, and innovative equipment and method are provided for efficient, uniform and intelligent dyeing production.

The invention belongs to the field of casting machining, and relates to an automatic profiling mold and method for an inclined guide core-pulling sliding block structure. The mold comprises an upper pressing mold, a lower mold, a bottom plate, an air cylinder, mold feet, a top plate assembly, a sliding rail, an inclined sliding block, a core block, an ejector rod and a spring. The upper profiling is connected to an upper pressing plate of the wax injection machine; the bottom plate is fixed on a wax press workbench, the cylinder is arranged in the middle of the bottom plate, the mold feet are arranged around the bottom plate, and the lower mold is arranged at the tops of the mold feet; the upper end of the inclined through hole is close to the center; the inclined section of the inclined sliding block penetrates through the inclined through hole and penetrates out of the lower surface of the lower die; blind holes are formed in the edge of the lower surface of the lower die; a sliding rail is arranged on the upper surface of the top plate assembly in the radial direction, and the bottom of the inclined section of the inclined sliding block slides on the sliding rail through the sliding block. The ejector rod is fixed to the edge of the ejector plate assembly, the upper portion of the ejector rod extends into the blind hole, and the spring sleeves the ejector rod and is located between the lower die and the ejector plate assembly.

A dual-mass flywheel (1) is installed in the drive train of a motor vehicle driven by an internal combustion engine, and consists of a primary part (2) and a secondary part (3), the primary part and the secondary part are connected by a spring damping device (5) and can rotate about a rotation axis (4) and can be twisted relative to each other in a limited manner, an arc spring (7) installed in a spring channel (6) of the spring damping device is supported on a stop of the primary part and a support flange (18) of the secondary part, the multi-piece primary part includes a disk-like axially elastic flexible plate (10), the flexible plate is fixed to the internal combustion engine radially on the inside and is connected to the primary flywheel mass (13) radially on the outside, the outer bent leg (11) of the one-piece flexible plate is surrounded by a cylindrical section (12) of the primary flywheel mass to fix the flexible plate in a torsionally rigid manner, and the primary flywheel mass (13) includes a toothed ring (21) positioned on the outside and local areas (27, 28) for balancing measures.

The utility model relates to the field of ceiling fan installation accessories, in particular to a fast-assembly mechanism applied to a ceiling fan and used for fixing an upper cup, the ceiling fan comprises a ceiling fan body, a hanging rod and the upper cup, the fast-assembly mechanism is arranged on the hanging rod and can be adjusted up and down in the length direction of the hanging rod, and the fast-assembly mechanism comprises an installation sleeve assembly and a locking assembly. And the two are connected and matched to lock the whole quick-mounting mechanism and the upper cup on the hanging rod. The upper cup is fixed to the preset position of the hanging rod through the quick mounting mechanism, the problems that in the prior art, the upper cup and the external thread column are integrally formed, molds of different types of upper cups matched with the external thread column need to be produced, and the stock burden of accessories is increased are solved, the quick mounting mechanism can be independently manufactured and then matched with the different upper cups to meet the mounting requirement, and the mounting efficiency is improved. The overall manufacturing cost of the ceiling fan is reduced, good universality is achieved, and the quick mounting mechanism further has the advantages of being convenient to mount and operate and reliable in structure.

The utility model discloses a filter device and filter system for water treatment, and the device comprises: annular conveyer belt, a plurality of filter material bearing frame, fixed mounting is in annular conveyer belt, and a plurality of filter material bearing frame are spaced apart distribution on the circumference of annular conveyer belt, and filter material bearing frame has the openwork structure for liquid outflow, composite filter material filling layer, fixed filling in each filter material bearing frame, rotation drive mechanism is connected with annular conveyer belt to drive annular conveyer belt rotation and drive filter material bearing frame rotation with annular conveyer belt. The utility model discloses a filter device for water treatment through rotation drive mechanism and drive annular conveyer belt, make filter material bearing frame and its inside composite filter material filling layer circulate and move, so that adhering material is not easy to form permanent package layer on filter material surface, has more opportunity to be removed, adopts composite filter material filling layer to improve the filtration effect, reduces secondary pollution, and mechanical structure is simple, and the difficulty of manufacture, installation and maintenance is low.

The present invention relates to the field of packaging machinery technology, specifically a packaging bag easy-tear cutting device and packaging equipment, the cutting device includes a discharge channel for the packaging bag filled with contents to pass through, and a disc-shaped cutting blade arranged on one side of the discharge channel and capable of rotating, the outer edge of the cutting blade is provided with an annular blade, and the annular blade is provided with evenly distributed grooves at intervals, the cutting blade is parallel to the discharge direction of the discharge channel, and the side of the discharge channel is provided with an opening, and the blade of the cutting blade passes through the opening and extends into the discharge channel, so that the cutting blade can rotate relative to the packaging bag under the drive of the packaging bag and can cut the packaging bag; the packaging equipment is a packaging machine including the above-mentioned packaging bag easy-tear cutting device. The packaging bag easy-tear cutting device and packaging equipment of the present invention have simple structure, are convenient and practical, have good easy-tear forming effect, have low manufacturing, use and maintenance costs, and have a wide range of applications.

This invention provides a spray-type heat dissipation energy storage battery pack, including a base plate and a cover mounted on the base plate. A sealed battery cavity is formed between the cover and the base plate. Multiple rows of battery cell modules are installed within the battery cavity, with gaps between adjacent rows forming heat dissipation gaps. Multiple nozzles for spraying coolant are provided on the top of the battery cavity. The battery cell modules are mounted on the upper surface of the base plate, and a guide channel for guiding coolant flow is provided on the upper surface of the base plate. A drain pipe communicating with the guide channel and used to discharge coolant is provided on the cover or the base plate. This spray-type heat dissipation energy storage battery pack features an optimized cooling structure design, forming multiple cooling methods with high cooling efficiency and good effect, ensuring long-term stable and reliable operation of the battery pack. Simultaneously, it significantly reduces the amount of coolant used, lowering manufacturing, usage, and maintenance costs.

The utility model belongs to the technical field of phosphating filter equipment, and relates to a pipeline structure of a phosphating filter, which comprises at least two phosphating tanks arranged in parallel, each phosphating tank is respectively connected with a blanking pipe, the lower ends of the blanking pipes are gathered to a blanking main pipe, and the blanking main pipe is connected to an inlet of the phosphating filter; an outlet of the phosphating filter is connected with a filter outlet main pipe, the filter outlet main pipe is connected with the middle of a pipe body of a filter outlet branch pipe, the two ends of the filter outlet branch pipe are respectively connected with the middle of a pipe body of a conveying pipe, and the conveying pipe is divided into a phosphating tank branch pipe and a sewage discharging branch pipe by the filter outlet branch pipe. The upper end of the phosphating tank branch pipe extends into the phosphating tank, and the lower end of the pollution discharge branch pipe is connected to the pollution discharge header pipe. The utilization rate of the phosphating filter can be improved; the one-driving-two filtering requirement of the phosphating filter is met; the whole equipment is compact, and manufacturing and using cost is reduced.

The utility model relates to an automatic feeding and discharging device of a resin lens caravan rough grinding machine, and belongs to the technical field of lens automatic production. Comprising a rough grinding machine workpiece clamping jaw, a precise lens data inputting and feeding mechanism and a precise and automatic lens feeding and discharging mechanism, and the precise lens data inputting and feeding mechanism is fixedly connected to one side of the top of the precise and automatic lens feeding and discharging mechanism through a conveying belt connecting piece; the precise lens data inputting and feeding mechanism comprises a conveying belt frame arranged in the horizontal direction, a motor is installed on the side face of one end of the conveying belt frame, the motor is in transmission connection with a synchronous belt mechanism rotationally arranged on the surface of the conveying belt frame in a sleeving mode, and a third sensor is installed on the side face, away from the motor, of the other end of the conveying belt frame. A bar code input device is installed on the opposite side wall of the connecting position of the conveying belt frame and the precise and automatic lens feeding and discharging mechanism, and the left side and the right side of the bar code input device are respectively provided with a set of first sensors and first blocking air cylinders and a set of second sensors and second blocking air cylinders.

The invention discloses a device for automatically breaking, separating and recycling garbage bags, which comprises a shell, an automatic bag breaking operation chamber and an automatic separating and recycling operation chamber are arranged in an inner cavity of the shell, and a bag breaking roller and a linear motion component are arranged in the automatic bag breaking operation chamber; a garbage bag conveying roller and a garbage bag conveying plate which can be connected with the garbage bag conveying roller are arranged in the automatic separation and recovery operation chamber; a partition baffle is vertically arranged between the automatic bag breaking operation chamber and the automatic separation and recovery operation chamber, and a garbage bag conveying inlet is formed in the partition baffle. In addition, a garbage temporary storage plate and a garbage receiving plate capable of being opened and closed are arranged at the bottom of the automatic bag breaking operation chamber, and the garbage receiving plate can be connected with the garbage temporary storage plate when in a closed state. According to the device, automatic bag breaking and automatic separation and recovery of the garbage bags can be achieved, and the device has the advantages of being time-saving, labor-saving, safe, sanitary, simple in structure, convenient to use, safe and the like, and is remarkable in universality and practicability.

The application discloses a preparation method of telluric acid, and comprises the following steps: mixing tellurium dioxide material with a sodium hydroxide solution to perform an alkali leaching reaction, to obtain a sodium tellurite solution; mixing the sodium tellurite solution with an oxidizing agent to perform an oxidation reaction, to obtain a sodium tellurite precipitate; mixing the sodium tellurite precipitate with concentrated nitric acid to perform an acidification reaction, to obtain a telluric acid precipitate; and placing the telluric acid precipitate in distilled water to perform recrystallization, filtering and drying, to obtain a telluric acid product. According to the method, the tellurium dioxide material is used as a raw material, a synergistic process of alkali leaching purification, directional oxidation, acidification conversion and refined purification is adopted, high-purity telluric acid can be efficiently prepared, the purification of tellurium and the preparation of telluric acid can be integrally completed, the traditional synthesis path of the telluric acid, i.e., 'purification first and then synthesis', is overturned, the method has the characteristics of low raw material cost, simple process, high product purity and high yield, and is suitable for large-scale industrial production.

The present application discloses a preparation method of a bimetallic composite plate by a Bridgman method, wherein the bimetallic composite plate is composed of a metal substrate and a cladding plate, wherein the cladding plate is obtained by sintering after granulating metal powder, and the steps include: (1) the metal substrate is corrected and leveled, and the top surface is sequentially rusted, degreased and roughened, and cleaned for use; (2) the metal powder is mixed and granulated, poured on the top surface of the metal substrate, and smoothed after vibration; (3) the metal substrate with the top surface covered with metal mixed particles is horizontally sent into a regional sintering furnace, inert gas protection is introduced, and heated to the liquefaction sintering temperature of the metal particles, the temperature zone width is 10-50cm, and the regional high temperature is gradually passed at a speed of 30-200cm / h to complete sintering; (4) cooling gas is blown to the metal substrate at the bottom of the regional sintering furnace outlet, and the bimetallic composite plate is obtained after the other side is naturally cooled. The method sets the regional temperature control and cooling crystallization mode for the preparation of the bimetallic plate, so that the bimetallic composite plate has high density, strength and material consistency.

The present application relates to a kind of industrial juicer for deep processing of pennisetum, comprising: frame, feed hopper, pretreatment zone and residue-liquid separation zone are arranged in height on frame;Roller feeding mechanism, for material is rolled and delivered to pretreatment zone;Cutting material roller mechanism, including cutting plate being arranged in pretreatment zone, the outside of cutting plate can be movably installed cutting blade, and the bottom side of cutting blade is installed broken material compression roller;Hot softening guide mechanism, for heating softening treatment to material after roller pressing and conveying it to centrifugal separation zone;Juice separation device, including primary filter cartridge and secondary filter cartridge, the top of the secondary filter cartridge is closed and fixed with end cover plate, a plurality of residue outlets are formed in end cover plate, and lifting auger is rotatably arranged in the middle of end cover plate;Juice collection mechanism, for discharging and collecting juice.The present application can facilitate feeding and overall smooth progress of juicing process, and can effectively improve juicing effect and juicing efficiency.

The utility model discloses auxiliary equipment for cleaning a wire-drawing die, which belongs to the technical field of auxiliary equipment for cleaning the wire-drawing die, aims at reducing the cleaning time of the wire-drawing die and reducing the cleaning efficiency of the wire-drawing die, and comprises an electrical cabinet and an ultrasonic cleaning tank, a control motor is arranged in the middle of the electrical cabinet, a driving chain wheel is fixed to the driving end of the control motor, the outer wall of the driving chain wheel is meshed with a chain, the other end of the chain is meshed with a driven chain wheel, a linear adjusting assembly is arranged in the center of the driven chain wheel, and a mounting plate is rotationally mounted on one side of the top end of the electrical cabinet. According to the wire-drawing die cleaning device, the motor, the driving chain wheel, the chain, the driven chain wheel, the rotating rod, the first rotating piece, the connecting shaft, the limiting sliding block and the limiting rod are controlled to work in a matched mode, then the cleaning frame can be driven to slide in the ultrasonic cleaning tank in a reciprocating mode, and the cleaning time of a wire-drawing die can be shortened.

The present invention discloses a miniaturized high-pass filtering dual-polarized patch antenna, comprising a reflective floor, a first metal sheet and a second metal sheet. The first metal sheet and the second metal sheet are both square structures with four corners cut off and a gap in the middle. The reflective floor is a square structure. The gaps in the middle of the two metal sheets are formed by a combination of a square and a cross structure; the square gap and the cross gap are both located in the center of the metal sheet, the four branches of the cross gap and the four corners of the square gap point to the edge center of the metal sheet, the size of the cross gap is close to the edge of the metal sheet, and the patch antenna feeds the first metal sheet through four centrosymmetric metal probes. The present invention can achieve a good high-pass filtering effect and a high-pass filtering effect by digging gaps in the center of the parasitic patch and the feeding patch, and can also change the equivalent path of the current on the radiation patch, thereby achieving a miniaturized effect.

The invention relates to the technical field of thermosensitive moxibustion, in particular to a smoke abatement and oil removal thermosensitive moxibustion therapy instrument which comprises a first installation shell and a second installation shell, symmetrical installation plates are fixedly connected to the interior of the second installation shell, installation rings are fixedly connected to the installation plates, and two containing grooves are formed in each installation ring. A containing groove is formed in the mounting ring, a connecting groove is formed in the position, adjacent to the containing groove, of the mounting ring, a sliding groove is formed in the position, corresponding to the top end of the connecting groove, of the mounting ring, and a lifting rod is slidably connected into the sliding groove. The influence of smoke on doctors of traditional Chinese medicine is reduced to the minimum, the containing ring is convenient to mount and demount through cooperative use of all the components, in addition, moxibustion materials can be fixed through the containing ring only by rotating the rotating ring, and convenience is high.

The present invention discloses a method for preparing high-quality graphene by delocalized electrochemical stripping, comprising the following steps: placing a metal anode and a platinum sheet as an anode and a cathode, respectively, into an electrolyte for electrochemical stripping of graphene, with the positive and negative electrodes spaced and extending into the bottom of the electrolyte to form an electrolytic cell structure; adding graphite to the electrolyte, electrolyzing at a constant voltage of 10 to 50 V under stirring until the graphite in the solution is completely stripped, washing, and dispersing to obtain a dispersion of graphene. The present invention achieves efficient preparation of high-yield, low-defect graphene, pushes the efficiency of electrochemical stripping and the quality of graphene to a new height, and accelerates the large-scale batch preparation and commercial application of high-quality graphene.

The present invention provides a surgical instrument, a slave operating device using the surgical instrument, and a surgical robot with the slave operating device, wherein the surgical instrument comprises an end effector, a driving device and cables, the cables comprising a first driving cable, a first pair of cables and a second pair of cables; the driving device is used to drive the end effector to perform a pitch motion through the first pair of cables and the first driving cables, and to drive the end effector to perform a yaw motion through the first pair of cables and the second pair of cables. The end effector of the present invention is driven in two directions of pitch motion using different driving principles, that is, the pitch motion in a first direction is driven by a special pitch driving cable, while the pitch motion in another direction is driven by a driving cable that drives the end effector to yaw.

The utility model relates to a system for eliminating, reducing, clearing and sucking sputum and treating waste sputum. The system comprises a sputum tank, a liquid medicine tank and a liquid tank. The inner cavity of the tank is connected with a positive-negative pressure air source, a water source and a sputum suction and drainage pipe. The device further comprises a foot switch, an electromagnetic valve, a pressure regulator, a controller, an electromagnetic vibrator, an expiration electromagnetic valve switch, a trachea cannula, a double-channel sputum suction tube and the like. According to the principle, during sputum excretion, resonance is generated during lung expiration of a patient by controlling the switching frequency of the electromagnetic valve and vibration of the vibrator in a timing mode, lung secretions continuously overflow, and the treatment effects of sputum excretion, inflammation diminishing and detoxification are achieved. During sputum suction, the sputum suction tube is inserted into a trachea and a bronchus within more than ten seconds, and a trace amount of liquid is used for reducing and clearing sputum and synchronously sucking sputum, so that the ventilation and oxygen supply effects are improved, and the sputum suction tube plays a crucial role in rescuing the life of a critically ill patient. Sucked sticky sputum is added with water, stirred and discharged into a sewage station, replacement and destruction of a sputum suction bottle are omitted, cross infection is prevented, and environment-friendly biological safety scientific management is facilitated.

The invention relates to a target (110) for a shaft of a motor vehicle (1), said target (110) being configured to be mounted on a free end of said shaft and comprising: at least one metal tooth (112); a body (114) supporting the at least one metal tooth (112); and a securing element (116) comprising an insertion portion (116A) configured to be at least partially inserted on an end of the shaft, the body (114) being overmolded at least partially around the at least one tooth (112).

The utility model discloses an intelligent machine room energy-saving device, relates to intelligent machine room energy-saving technical field, including main room body and support mechanism, the top of main room body is fixedly connected with a plurality of sets of support mechanism, and the inside of support mechanism is provided with base, and one side of base is fixedly connected with L-shaped plate, a triangular supporting frame is arranged at the top of the L-shaped plate, a fixing block is fixedly connected to one side of the L-shaped plate, a first driver is arranged in the fixing block, the interior of the base is in a hollow shape, the left side and the right side of the base are stretched through screws, the supporting mechanism is connected with the main house body, and the first driver is connected with the supporting mechanism through the fixing block. The first driver provides power for the driving mechanism. Compared with an existing common intelligent machine room energy-saving device, the intelligent machine room energy-saving device has the advantages that the filter screen is connected to one side of the filter frame in the clamped mode, dust in air can be purified through the filter screen, and impurities in the air are prevented from polluting equipment in a machine room.

The utility model discloses a 14-pole motor armature winding structure, a wiring method and a motor, the 14-pole motor armature winding structure comprises double-layer wave windings arranged in 252 stator slots of the motor, and the double-layer wave windings comprise a U-phase winding, a V-phase winding and a W-phase winding; each group of windings comprises a first branch circuit, a second branch circuit, a third branch circuit and a fourth branch circuit, the first branch circuit and the third branch circuit are consistent in bar number and electrical angle, and the second branch circuit and the fourth branch circuit are consistent in bar number and electrical angle; the stator slot comprises an upper layer coil bar slot position and a lower layer coil bar slot position. According to the wiring method of the four-branch special balance branch in the embodiment of the invention, the law that the ratio of the number of magnetic poles to the number of the branches must be an integer is broken through, and the voltage difference between the branches of each phase is greatly reduced through the wiring method.

The invention relates to a series of gear units having a first gear unit (101) and a second gear unit (201); wherein the first gear unit (101) and the second gear unit (201) each have an input shaft (103, 203), a housing (105, 205), a support structure (107, 207) fixed in the housing and at least two bearings (109a, 109b, 209a, 209b) by means of which the input shaft (103, 203) is rotatably supported in the support structure (107, 207); and wherein the at least two bearings (109a, 109b) of the first gear unit (101) and the at least two bearings (209a, 209b) of the second gear unit (201) are each of the same structural type. The structural type of the at least bearings (109a, 109b) of the first gear unit (101) is different from the structural type of the at least bearings (209a, 209b) of the second gear unit (201); wherein the support structures (107, 207) are of the same structure.

The invention discloses kraft paper and a manufacturing method of the kraft paper. [Problem] To provide kraft paper that can be manufactured inexpensively and has excellent strength such as tear strength. [Solution] A kraft paper containing broad-leaved kraft pulp as a starting material pulp, the content of the broad-leaved kraft pulp in the starting material pulp being 90 mass% or more, the Kara value of the pulp after re-dissociation being 9.5 or more, and the pulp viscosity of the kraft paper measured in accordance with TAPPI T 230 being 15 mPa * s or more.