745results about How to "Uniform speed" patented technology

A process for preparing low-carbon olefin from methanol or dimethyl ether includes loading its raw material and silicon aluminium phosphate (SAPO34) molecular sieve as catalyst into gas-solid parallel down-flowing fluidized bed reactor, super-short contact, reaction, fast gas-solid separation to separating resultant from catalyst to prevent secondary reaction, and regerating catalyst for cyclic use. Its advantages include high output rate (93%), high conversion rate of raw material, and less by-product.

A method and device for managing and controlling a scanning system that incorporates multiple oscillating scanners is provided by the present invention. In accordance with the preferred embodiment, a resonant frequency is determined for each of the scanners. A drive signal for driving the oscillating scanners is generated based upon the determined resonant frequencies. An amplitude adjustment circuit determines the difference between the drive signal frequency and the resonant frequency of each oscillating scanner and adjusts the amplitude of the drive signal provided to that particular oscillating scanner such that scan amplitude of each oscillating scanner is approximately equal. The offset from the resonant frequency is also used to calculate a phase adjustment for the drive signal to insure that the oscillating scanners are operating in tandem.

A virtual online document management system wherein an original document is broken down into logical pages before uploading into the document repository in a network environment. Each logical page is converted into a separate electronic image file. Each logical page is an addressable unit within the computer's storage. A virtual document consists of a sequence of pointers to the corresponding logical pages. These virtual documents can also be organized into virtual folders, again by the use of a sequence of pointers. The pointers to the logical pages that designate the virtual documents and the virtual folders are maintained in a computer software program practicing the disclosed method. The user operates on the logical pages with the program to create new virtual documents, retrieve the pages over the network, and to aggregate virtual documents to form virtual folders.

A method to deliver fuel during a start for an internal combustion engine is described. The method provides individual cylinder fuel control based on the number of fueled cylinder events. The method offers improved engine emissions while maintaining engine run-up performance.

The invention provides an electric automobile power battery equalization management system and method. Battery cells of a battery pack of the electric automobile power battery equalization management system are connected in series and sequentially divided into M identical battery modules. All the battery modules are connected with corresponding resistor equalization circuits and capacitor equalization circuits as well as a coaxial multi-winding DC-DC converter. A microcontroller is connected with a battery management system so as to acquire battery pack status data. Signals of the microcontroller are connected with all the resistor equalization circuits and the capacitor equalization circuits and further connected with a pulse drive unit and a converter. According to the equalization management method, the microcontroller first acquires nominal parameters of the battery pack, so that control parameters are determined; then, the microcontroller acquires current operation variables, so that the maximum deviation and the dispersion degree of voltage of the battery modules are calculated; according to different states of the battery pack, namely charging, quiescence and discharging, different judgment standards for starting equalization are selected, the converter is used for equalization between the modules, the resistor equalization circuits and the capacitor equalization circuits are used for equalization between the battery cells. According to the electric automobile power battery equalization management system and method, advantages of various equalization circuits are complementary to one another, so that equalization speed is increased, and equalization efficiency is improved.

The invention relates to an energy transfer type power battery quick balancing system and a control method thereof. The invention relates to the battery voltage balancing system and further relates to the control method of battery pack quick balancing process, which solves the problem that a balanced battery single body and an energy storing element are impacted through pulse current by a currentbalancer in the prior art. The system comprises a power battery pack single body battery voltage and flying capacitor voltage detecting network, a current sensor and a signal modulating circuit, a single chip microcomputer, an electric power transfer channel, a first filter circuit, a two-way buck-boost converter, a second filter circuit and a flying capacitor. After starting to work, the system firstly detects the battery pack single body battery voltage, the flying capacitor voltage and the charging/discharging current; and if the dropout voltage between the highest voltage of the battery single body and the lowest voltage of the single body exceeds a set value, the balancing operation is started.

The invention discloses a lithium battery pack SOC (state of charge) equalization system and a lithium battery pack SOC equalization method. The equalization problems of lithium battery packs are divided into two levels, including intra-group equalization and intergroup equalization. Lithium batteries are divided into a plurality of groups, every lithium battery group is in parallel connection with a bidirectional DC-DC converter, the output ends of the bidirectional DC-DC converters are in series connection to serve as the output ends of a direct-current bus and a power generation system, and loads are in parallel connection. The batteries in every group are connected through bilateral switches and are in parallel connection with by-pass switches so as to be connected dynamically. Intergroup equalization is achieved by distributing output voltage of every group according to average SOC thereof; intra-group equalization can be achieved by controlling dynamic connection of every single battery in every group. The lithium battery pack SOC equalization system and the lithium battery pack SOC equalization method have the advantages that lithium battery pack SOC is equalized without an extra equalization circuit, so that energy transfer among the batteries is avoided, lithium battery pack equalization is achieved automatically in a charge-discharge process, the equalization speed is greatly increased and the equalization efficiency is greatly improved.

The invention discloses a device for controlling the delivery and the uniform distribution of reaction gas in a MOCVD reaction chamber. By respectively controlling the flow of gas passages non-uniformly distributed radially on a front gas homogenizing plate and input passages at different positions, at least two reaction gases are respectively introduced into two paths which are radially and axially crossed on a spray header, and can be secondarily distributed by nozzles in different shapes, so the uniformly distributed boundary layer concentration, speed and temperature required are achieved on the surface of a rotary epitaxial wafer, the quality of massively produced epitaxial films and the finished product ratio of massively produced epitaxial wafers are improved, the consumption of expensive reaction gases can be effectively controlled and the epitaxial production cost is reduced. By properly increasing the distance between the surface of the spray header and the epitaxial wafer, deposits generated on the surface of the spray header and the nozzles in the epitaxial growth are reduced, the cleaning period is prolonged, and the production efficiency and system capacity are improved. The device also can reduce the processing difficulty and manufacturing cost of the nozzles of the spray header and cooling medium passages.

The invention discloses an energy transfer two-way balancing system based on a power inductor and a control method of the energy transfer two-way balancing system based on the power inductor. The energy transfer two-way balancing system based on the power inductor comprises a data acquisition module, a master control module, a communication module, a balancing module and a driver module, and a two-way balancing circuit topology structure which uses the power inductor as an energy transfer medium is selected. According to the general balancing thinking of the energy transfer two-way balancing system based on the power inductor and the control method of the energy transfer two-way balancing system, the data acquisition module carries out real-time detection on voltage of batteries in a battery pack and electric current of buses in the battery pack, and identifies the working state of the battery pack, inconsistency judgment is carried out through balance variables determined in advance and balance indexes determined in advance, balancing is carried out according to an established control strategy when balance conditions are met, the states of the batteries are continuously monitored, and balancing is stopped until stop conditions are met. Energy can be transferred from the battery with higher voltage to the battery with lower voltage and adjacent to the battery with the higher voltage through control over a switch of an MOSFET corresponding to the battery with the higher voltage, and the magnitude of balanced current is related to the closing time of the corresponding MOSFET. The energy transfer two-way balancing system based on the power inductor can carry out pending balancing, charging balancing and discharging balancing, achieve efficient and comprehensive balancing, and finally solve the problem that the batteries are not consistent in the process of use.

The invention belongs to the technical field of kitchen appliances, and particularly relates to an integrated cooker. The integrated cooker comprises a machine body and a range hood body; the range hood body comprises an air inlet, an air collecting box and a fan assembly; the air collecting box communicates with the air inlet; the fan assembly is arranged in the air collecting box; a volute air duct of the fan assembly extends downwards to the wall face of the bottom of the air collecting box and extends out of the bottom of the air collecting box to be rotationally provided with an air outlet base; and an air outlet is formed in one side of the air outlet base. According to the integrated cooker, the volute air duct extends downwards to the wall face of the bottom of the air collecting box and extends out of the bottom of the air collecting box to be rotationally provided with the air outlet base; the air outlet base is directly located on the outer side of the air collecting box, and the situation that a channel is located inside and occupies too much space is avoided; a through hole does not need to be additionally formed in the side edge of the machine body, and leakproofnessof the side face of the machine body is guaranteed; and meanwhile, the air outlet base is rotatably arranged, so that a user can conveniently adjust the air outlet direction according to actual needs,and humanization is achieved.

A gas burner comprising a section for mixing combustible gas with air; a cover lid closing the mixing section; and a crenellated wall comprising first segments with a first thickness and one or more second segments with a second thickness greater than the first thickness, the second segment allows the cover lid to be sitting and placed over the wall, and main portholes which are constant for a determined length of said main portholes from an inside towards an outside of the crenellated wall, and near the outside of the crenellated wall, the height of the porthole is decreased by virtue of an α angle; one or more secondary portholes with a size smaller than the main portholes, wherein the at least one secondary porthole has a change in direction in such a way, that the height of the at least one secondary porthole decreases from the inside towards the outside of the crenellated wall according to a β angle until the height of the porthole achieves a constant height near the outside of the wall; and two or more tertiary portholes per each first and second segment with a half cane shape, the diameter of each half cane being equal to the width and depth of said tertiary porthole, wherein said tertiary portholes are of lesser size than the at least one secondary porthole.

Improvement in the design of variable original radius chainrings for coupling to conventional bicycle cranks in order to apply traction, which primarily consists of its being provided with a plurality of possible anchorages to the crank, so that the user may adjust the relative position between the crank and the major radius of the chainring, and thus optimise the biomechanics of his own pedalling; furthermore, other design parameters are offered to endow this non-circular pedalling with leg speeds optimised within the limitation of pedalling with cranks at 180 degrees and therefore with a dead spot.

The invention relates to an SNCR (selective non-catalytic reduction) and SCR (selective catalytic reduction) combined denitration method and an SNCR and SCR combined denitration device for flue gas of a coal-fired boiler. The SNCR and SCR combined denitration method includes adding reducing agents which are ammonia-containing solution into a temperature window at the temperature ranging from 800 DEG C to 1050 DEG C of a hearth, enabling partial ammonia to be subjected to SNCR reaction with NOX in flue gas and allowing rest escaping ammonia to flow to a flue with flue gas to carry out heat exchange and cooling; and adding to replenish reducing agent to a temperature zone at the temperature ranging from 500 DEG C to 650 DEG C of the flue at an outlet of the boiler, dissolving ammonia, and enabling the ammonia to be subjected to SCR reaction with NOX at the temperature ranging from 300 DEG C to 420 DEG C in the presence of V2O5 and WO3 to remove the NOX remained in the flue gas. The V2O5 and the WO3 are active substances of catalysts, the molar weight of NH3 in the total amount of the added ammonia-containing solution is 1.45-1.6 times of that of NOx in the original flue gas, the ammonia-containing solution containing the NH3 with the molar weight of 1.1-1.2 times of that of the NOx in the original flue gas is added into the temperature window at the temperature ranging from 800 DEG C to 1050 DEG C in the hearth of the boiler, and the rest ammonia-containing solution is added into the temperature zone at the temperature ranging from 500 DEG C to 650 DEG C of the flue of the outlet of the boiler. By the method, the amount of the reducing agents added into an SNCR reaction section and the amount of escaping ammonia can be reduced, the total NH3 of the reducing agents added into the flue gas at the temperature ranging from 500 DEG C to 650 DEG C participates in the SCR reaction, the total consumption of the reducing agents is reduced, and the denitration efficiency is improved.

An apparatus for continuous casting of metals has members (16) adapted to generate a stationary magnetic field of a variable strength over substantially the entire horizontal cross section of the mould from one long side to the other long side close to, or below, the region for supply of molten metal at a distance below the upper surface of the molten metal. There are also members (17) adapted to generate a variable magnetic field in the area of the upper surface in a region that is centrally located with respect to said cross section and close to a region for supply of molten metal. A unit (12) is adapted to control said magnetic members (16, 17) to generate, independently of each other, magnetic fields with an appearance that is dependent on the value prevailing of one or more predetermined casting parameters.

A unit for processing thermoplastic synthetic material comprising a machine housing (1) with a delivery cone (12) in whose feed shaft (14) a driven slider (30) presses synthetic material which is to be processed and which is located on a base plate (7) through a feed inlet (11) of a conveyor tube (6) against a processing drum (3) which is placed perpendicularly in the conveyor tube (6) in relation to the direction of the movement of the slider (30). The slider (30) extends over the entire length of the feed inlet (11) which itself extends over the entire blade supporting section (17) of the processing drum (3). Blades (4) are placed thereon in a helical line and operate in conjunction with a fixed counter blade (5) which is fastened to the opening edge (25) of the feed inlet (11). The blades (4) and the associated screw conveyor (9) convey disintegrated synthetic material in axial direction (20) though the conveyor tube (6) towards an outlet (10), which leads downwards into the screw tube (22) of the extruder screw (8) through which the synthetic material is delivered.

The present invention provides a nucleic acid extraction instrument including a base, an outer housing connected with the base, and an instrumental main body positioned inside the outer housing and mounted to the base; and the instrumental main body includes an electrical power pack, a main control device, a first motor set, a second motor set, and a third motor set.

The invention discloses a stainless steel fiber felt used for fuel cell bipolar plates and a manufacturing method thereof, belonging to the technical field of fuel cell bipolar plate flow fields. The manufacturing method of stainless steel fiber mat can be divided into four steps: processing stainless steel fiber by cutting method, pretreatment of stainless steel fiber, molding of fiber mat, and high-temperature solid-state sintering. After the metal fibers are sintered, metallurgical bonding is achieved between the fibers, forming a large number of multi-scale pore structures. The manufactured stainless steel fiber felt has the advantages of high porosity, high specific surface area, good heat and mass transfer performance, surface hydrophobicity, simple manufacturing process and low cost. This method is applicable to manufacture various metal porous materials, and its pore size and porosity can be controlled.

The invention discloses a device for equalizing charge of a battery and a method thereof. The device is used for the charge of the battery comprising at least one battery pack. The battery pack is connected with a plurality of battery cells in series. The device comprises a main power supply used for the integral charge of the battery, an auxiliary power supply used for the compensating charge ofthe battery pack, a charge gating circuit used for connecting the auxiliary power supply to each battery cell in the battery pack in a gating manner, and a collection control circuit. The collection control circuit is used for collecting the voltage value of each battery cell in the battery pack and determining a to-be-equalized battery cell group according to a collection result. The to-be-equalized battery cell group comprises a battery cell in the battery pack or comprises two or more adjacent battery cells in the battery pack, and is used for controlling the charge gating circuit to connect the auxiliary power supply with the to-be-equalized battery cell group and controlling to adjust the voltage value output by the auxiliary power supply to be the charging voltage needed by the to-be-equalized battery cell group so as to charge the to-be-equalized battery cell group. The invention has low charge energy consumption and quick equalizing speed.

The invention provides a dragging, translating and lowering device for dismantling a pier top beam section and a pier. The device comprises four supporting points, wherein each supporting point comprises four steel pipe piles, four steel pipe supporting frames, four transverse girders, four longitudinal translation beams, two longitudinal translation devices and two lifting and lowering systems; transverse translation beams can move in a transverse direction; the longitudinal translation devices are arranged at the upper parts of the transverse translation beams; the lifting and lowering systems are fixed on the longitudinal translation devices; the transverse translation beams are used for adjusting transverse positions of the lifting and lowering systems; the longitudinal translation devices are used for adjusting longitudinal positions of the lifting and lowering systems; and the lifting and lowering systems are used for lifting or lowering the pier top beam section and the pier. A dragging, translating and lowering method for dismantling the pier top beam section and the pier, provided by the invention, is capable of economically and efficiently solving a dismantling problem of a pier top box beam and pier structure under in the absence of the hoisting of a crane, suitable for dismantling the pier top beam section and the pier of a beam bridge or a bridge with a concrete girder and especially suitable for dismantling engineering for the pier top box beam and pier structure of a multi-span continuous beam bridge using a whole-span lowering dismantling technology.

The invention relates to a method for smearing wood wax oil on the surface of a wood product, which comprises the following steps: 1, smoothening; 2, smearing the wood wax oil; 3, kneading a wax oil coating on the surface; 4, wiping floating oil; 5, drying; 6, repeating the steps 2-5 for one or two times; 7, polishing till the hand feeling is smooth; and 8, spraying polishing wax, polishing and entering a next assembly process. By using the method, the crack of the wood product can be effectively prevented, and the service life is prolonged; the operation is simple, and materials, labors and oil are saved; the wood wax oil is a green and environmentally-friendly coating and a low-carbon environmentally-friendly product; and by using the method, the wide application of the wood wax oil can be promoted, and an important significance on environment friendliness is realized.

The invention relates to a full-hydraulic continuous-penetration static sounding machine with double oil cylinder groups. Two groups of oil cylinders are adopted and mounted on a frame in a cross shape in a manner of being divided into an upper layer and a lower layer; each group of oil cylinder is fixedly connected together through a cross beam; hydraulic chucks are mounted on the cross beams; stroke limiting switches are mounted below the oil cylinders; a probe rod passes through center inner holes of the two hydraulic chucks; and a hydraulic control system is further provided with valve groups, reversing valves, a hydraulic pump, an electro-hydraulic proportional speed regulating valve KT, a relief valve, a pressure gauge and an oil box. The static sounding machine adopts double oil cylinder group feeding and automatic reversing control; the double hydraulic chucks automatically clamps or loosens the probe rod and automatically achieves continuous uninterrupted feeding through the cooperation of the movement of the oil cylinders; and steady uniform speed feeding is achieved by utilizing the electro-hydraulic proportional speed regulating valve. The static sounding machine has the advantages of simple structure, reliable operation, high efficiency, economy and durability, is convenient for operation, is suitable for the technical field of geotechnical engineering, such as geotechnical engineering, high-speed railway construction, expressway construction and port engineering, and has a wide application prospect.

The invention relates to a system for testing heat transfer and resistance characteristics of a large-size generating equipment heat exchanger. The system comprises a straight flow type air duct system, a circulating water system and a circulating oil system. The straight flow type air duct system inhales air, after heating, flow mixing and rectification, the air flows into the air cooling device; after heat exchange through an air cooling device tester, hot water is inputted by a water pump to a cooling tower for cooling, the cooled water is heated by an air heater to realize water temperature required by a test and then flows into a heat exchanger tester to form a temperature-controllable circulating water system; oil in an oil tank is heated, the heated oil flows into the heat exchanger tester, the oil after heat exchange flows into an oil storage tank to form the circulating oil system; the circulating water system and the circulating oil system respectively realize closed circulating and are used for testing heat transfer coefficients and resistance characteristics of the heat exchanger. The test system can test heat transfer and flow resistance characteristics of the air cooling device and an oil cooling device, can realize water cycle utilization and greatly saves resources.

The invention discloses an experimental facility and an experimental method for the fire suppression effectiveness evaluation of additive-containing water mists. The experimental facility comprises an oxidizing agent flow quantitative supplying and conveying system, a combustible gas quantitative supplying and conveying system, a representation system, and a data acquisition and remote control system, wherein the oxidizing agent flow quantitative supplying and conveying system is composed of a frequency conversion vortex fan, a vortex shedding flowmeter, a small wind tunnel, an atomization device and a sprayer support; the combustible gas quantitative supplying and conveying system is composed of a columnar porous burner and an automatic gas distributing system; the representation system is composed of a water mist and flame action observation device, a flame temperature measurement device and a condensed phase grain size and speed measurement device. The experimental facility can realize quantitative supplying of air and combustible gas, the adjustability of the particle size distribution and the release amount of the liquid phase fire extinguishing agent and the adjustability of the concentration of additive, and the representation of the temperature of a position nearby a stagnation point, the particle diameter and the speed. The experimental facility can be used for screening high-efficiency water mist additives, quantitatively evaluating the fire suppression effectiveness for specific flames in the aspects of the variety and the concentration of the additive, and researching the physical and chemical mechanism of the action of the condensed phase fire extinguishing agent and the flame.