44results about How to "Suitable for working conditions" patented technology

The invention relates to a digital intelligent driving device of a high-power IGBT (insulated gate bipolar translator). The digital intelligent driving device comprises a DC/DC (direct-current) conversion circuit, a CPLD (complex programmable logic device) logic control module, an active clamping feedback module, a retreating-protection over-current feedback module and a two-stage di/dt detecting module, wherein the output end of the DC/DC conversion circuit is connected with an undervoltage protection module; the output end of the undervoltage protection module is connected with the CPLD logic control module; and the input end of the CPLD logic control module is connected with a PWM (pulse-width modulation) pulse-width modulator, and the output end of the CPLD logic control module is connected with a variable-gate resistance module. The digital intelligent driving device provided by the invention has the advantages that the protection functions such as power isolation, over-current protection, di/dt and active clamping are integrated, the logic control is realized by adopting the programmable logic device CPLD, the ideal driving performance is achieved by real-time variable-gate resistance driving, and soft shut-off is realized by selecting proper shut-off resistance according to the over-current degree, so that the switching loss is effectively reduced and a Miller effect is weakened.

The invention provides a high silica fiber woven tectorial membrane filter material for a coal-fired boiler. The high silica fiber woven tectorial membrane filter material for the coal-fired boiler comprises four layer of structures, namely an impregnation treatment protective layer, a high silica fiber expanded fabric layer, an impregnation treatment protective layer and a polytetrafluoroethylene microporous membrane layer sequentially, wherein the high silica fiber expanded fabric adopts double-layer woven fabric woven by adopting a double-layer rearranged twill technology; the whole high silica fiber expanded fabric layer is impregnated in an impregnation liquid, and the impregnation treatment protective layer is formed on the surface of the high silica fiber expanded fabric layer; the high silica fiber expanded fabric layer and the impregnation treatment protective layer form a high silica fiber treatment fabric layer; and the polytetrafluoroethylene microporous membrane layer thermally covers the high silica fiber treatment fabric layer. The high silica fiber woven tectorial membrane filter material for the coal-fired boiler has the characteristics of high filtering accuracy, temperature resistance, corrosion resistance, high strength, low flexibility, low resistance, high efficiency and long service life, PM2.5 dust can be efficiently trapped, and the near zero emission of dust less than 5mg/Nm<3> is realized.

The invention belongs to the technical field of environmental monitoring and particularly relates to an on-line analyzer and an analysis method if mercury in flue gas based on wet enrichment. The analyzer comprises an enrichment system, a detection system and a control system. The analysis method comprises the following steps of enrichment reagent introduction, blank detection, sample gas enrichment, sample detection and solution discharge or storage. The analyzer has the advantages that the analyzer can realize on-line analysis of mercury (Hg<2+>, Hg<0> and total mercury) in different valent states and even analysis of different heavy metal elements by combining with a high efficiency enrichment device and an on-line X-ray fluorescent technique and through flexible selection of a chemical reagent, and detect and store samples for a laboratory off line.

The invention provides an online analyzer for enriching total mercury in flue gas based on a dry process and an analysis method and belongs to the technical field of environment monitoring. The online analyzer comprises an adsorbent filling system, a sample enriching system, a detection system, a filter membrane transmission system and a control acquisition system, wherein the adsorbent filling system realizes the filling of a powdered adsorbent on the surface of a filter membrane; the sample enriching system is used for enriching the total mercury in sample gas; the detection system is used for carrying out online nondestructive testing on an acquired sample; the filter membrane transmission system is used for transmitting the filter membrane among all subsystems; and the control acquisition system is used for realizing coordinated operation of all the systems and acquisition, processing and storage of all data. The analysis method comprises the following steps: filling the adsorbent, enriching the sample and detecting the sample. The online analyzer and the analysis method have the advantages that the efficient powdered adsorbent is introduced and a filter membrane enriching technology is combined, so that whole enriching of gas-state mercury and mercury particles in the flue gas or the environmental atmosphere can be realized at the same time; and an online X-ray fluorescent technology is used for detecting to finally realize the online analysis of the total mercury in the flue gas or the environmental atmosphere.

The invention belongs to the technical field of hybrid power vehicles, and particularly relates to a hybrid power drive device. The four-mode hybrid power drive device for heavy vehicles comprises four planet rows arranged coaxially, two motors, three brakes, two clutches and a one-way clutch. The four planet rows form a power-splitting speed reduction mechanism, and four-mode power splitting can be achieved. Compared with single-mode power splitting, on one hand, the speed ratio range of the drive device can be expanded; on the other hand, the torque and power of the motors can be reduced, and the power density of the drive device can be improved. The two motors are arranged between the planet rows respectively, so that the structure is compact, supporting is easy, and the space of the ends of the motors is fully utilized. The process is simple; the needed power of the motors is small, a wide drive ratio range can be achieved, and the four-mode hybrid power drive device is suitable for the use conditions of heavy vehicles.

The invention relates to an epoxy resin composition suitable for being adopted at low temperature. The composition comprises a polyfunctionality epoxy resin, biphenol A polyether epoxy resin, thermoplastic resin, a curing agent and an interfacial modification agent, wherein the composition is prepared from, by mass, 100 parts of polyfunctionality epoxy resin and biphenol A polyether epoxy resin, 20-40 parts of thermoplastic resin, 30-50 parts of the curing agent and 2-5 parts of the interfacial modification agent. The epoxy resin composition has the good manufacturability, the cured product has the advantage of being not likely to crack at low temperature, and the prepared carbon fiber composite material has the advantages of improving micro-crack resistance, being good in interface bonding force and the like, and is suitable for the fields of aircraft structural component manufacutirng, fuel storage tank and other military low temperature wind tunnels.

The invention discloses a hydromechanical stepless transmission device for a loading machine. The hydromechanical stepless transmission device comprises a hydraulic speed adjusting loop, a planetary division confluence mechanism, a hydromechanical fixed shaft gear transmission mechanism and a reverse gear mechanism. According to the transmission device, the planetary mechanism is adopted for converging hydraulic power and mechanical power and formed by connecting three hydromechanical sections in a division torque confluence speed power division flow, and the three hydromechanical sections are used for starting, low-speed operation and high-speed traveling correspondingly. A reverse gear comprises two hydromechanical sections. Circulating power does not exist in all the hydromechanical sections, and compared with a hydraulic force mechanical power gear shifting gearbox, the transmission device can obtain higher transmission efficiency. The sections are switched only by controlling one clutch, and smooth switching can be achieved.

The invention discloses a low-emission system of a non-road diesel engine, comprising a main engine of a diesel engine equipped with an in-line pump and a gas recirculation system; wherein, the main engine of the diesel engine is provided with an exhaust passage used for exhausting waste gas in a combustion chamber; the gas recirculation system is used for transporting waste gas to the combustion chamber. The low-emission system has simple structure, convenient control and low manufacturing cost, is more suitable for the working conditions of the non-road diesel engine and can reduce the generation of nitrogen oxide, thus realizing least nitrogen oxide in the waste gas and meeting the stricter emission standard.

The invention discloses a hydro-mechanical composite stepless transmission device of a loader. A hydro-mechanical segment is adopted for starting, and the low speed transmission efficiency is improved. The transmission device comprises a hydraulic speed regulating loop, a CR-CR dividing and converging mechanism, a hydro-mechanical I segment fixed shaft gear transmission mechanism, a fixed shaft gear transmission mechanism and a forward reversing mechanism. Compared with a hydraulic force and mechanical power shifting gearbox of a loader, by means of the hydro-mechanical composite stepless transmission device of the loader, the transmission efficiency of the transmission device can be substantially improved, an engine can be made to normally work in an economical rotating speed interval, and the oil consumption and the noise level of the loader are reduced.

The invention relates to high extreme pressure lithium-based lubricating grease. The production process comprises the following steps: adding 1/2 of base oil high-viscosity mineral oil, fatty acid, lithium hydroxide and calcium hydroxide according to the stipulated mixture ratio in parts by weight, performing saponification reaction at the temperature of 100 DEG C, then adding the heated oil, namely the remaining 1/2 of the base oil high-viscosity mineral oil, heating to 200 DEG C to the greatest extent to perform high-temperature refining, then cooling to 180 DEG C, further cooling to 110 DEG C, adding an antioxidant, an extreme pressure agent, an oily agent and a tackifier, then performing post-treatment by using a homogenizer or a cyclic shearing machine, filtering and packaging. Tests prove that the grease becomes thin when meeting water, the thinness is far less than that of traditional extreme pressure lithium, the grease is less prone to loss and can provide good anti-rust protection for bearings, when the water content in the grease is 15%, the extreme pressure performance is reduced to a smaller extent and higher than the extreme pressure performance of the traditional extreme pressure lithium grease, the bearings are not worn at all, the production is not affected, and the grease is very suitable for high load, high temperature, high speed and much water working conditions of the bearings.

The invention discloses a sintered compact high-zirconium brick and a preparation method thereof. The method comprises the steps of pulping, spray granulation, isostatic compaction and high-temperature sintering, according to the preparation method, micron-sized Y2O3 with monoclinic zirconium oxide with the proportion of 40-70% is mainly used for stabilizing an electric melting zirconium oxide raw material, and 1-5% of nano-sized SiO2 is introduced; according to the method, a uniform structure in which zirconium oxide is uniformly dispersed in a small amount of glass phase is obtained, the prepared sintered compact high-zirconium brick has the characteristics of low porosity, high strength, good erosion resistance and low production cost, and large-size products can be prepared.

The invention relates to the field of vehicle transmission equipment, in particular to a multi-stage hydraulic machine continuously variable transmission for a heavy vehicle. The multi-stage hydraulicmachine continuously variable transmission for the heavy vehicle comprises a mechanical transmission assembly, a hydraulic transmission assembly, a power shaft, a motor shaft and a main output shaft,wherein the power shaft, the motor shaft and the main output shaft are parallel; the mechanical transmission assembly comprises a front planetary row confluence device, a rear planetary row confluence device, a fixed shaft gear pair and a plurality of clutch execution devices used for band switch; the hydraulic transmission assembly comprises a variable-displacement hydraulic pump and a quantitative hydraulic motor which are arranged in series; an input shaft of the variable-displacement hydraulic pump is fixedly connected with a third gear; and an output shaft of the quantitative hydraulic motor is fixedly connected with the end, close to the front planetary row confluence device, of the motor shaft. The multi-stage hydraulic machine continuously variable transmission for the heavy vehicle not only can achieve multi-stage large-range continuously variable speed adjusting performance, but also can meet the multi-mode requirements for driving of the vehicle under different working conditions.

The invention relates to a built-in flushing and cooling valve of a hydraulic motor. The built-in flushing and cooling valve comprises a valve body. A two-way variable pump, a first valve element, a second valve element, a first spring and a second spring are arranged in the valve body. The two-way variable pump is connected with an oil inlet of the hydraulic motor. A concave cavity is formed in the middle of the first valve element. The second valve element is arranged at the lower end of the first valve element. An oil cavity is formed between the first valve element and the second valve element. The oil cavity is communicated with the concave cavity. A second oil hole is formed in the oil cavity and communicated with an inner oil cavity of the hydraulic motor. A blind hole is formed in the middle of one end of the second valve element. The diameter of the blind hole corresponds to that of the oil cavity. A first oil hole is formed in the side face of the second valve element and communicated with the blind hole. The concave cavity is communicated with the inner oil cavity of the hydraulic motor through the oil cavity, the first oil hole and the second oil hole. A low-pressure oil source in the hydraulic motor can be automatically selected, energy is fully utilized, and the flushing valve can be automatically closed under the special condition; and hydraulic flow in the valve is stable and adjustable, and the valve can be suitable for use working condition integrated forms of different elements and is easy to install.

A high-extreme-pressure Li-base lubricating grease with high water-proofing performance is prepared through proportionally mixing part of high-viscosity mineral oil with fatty acid and lithium (or calcium) hydroxide, saponifying reaction, adding rest of said mineral oil, heating to 200 deg.C, high-temp refining, cooling, adding antioxidizing agent, extreme-pressure agent, oily agent and viscosity increaser, homogenizing and filter.

The invention relates to a treatment system for bean vermicelli production wastewater, and belongs to the technical field of sewage treatment. The treatment system comprises a water inlet and a water outlet, wherein a first settling pond, an acidification adjustment pond, a lifting water pump, an anaerobic reactor, a second settling pond and an aerobic treatment pond are sequentially communicated between the water inlet and the water outlet through a pipeline; the first settling pond is used for the early-stage settling treatment of wastewater, the acidification adjustment pond is used for adjusting the water quality and quantity of high-concentration wastewater, and the anaerobic reactor is used for carrying out anaerobic fermentation, producing biogas and purifying the wastewater; the second settling pond is also provided with a branch loop reflowing to the anaerobic reactor, and the acidification adjustment pond also comprises a water quantity adjusting pond. According to the invention, a large amount of waste pollutants can be converted into a green energy namely biogas, thereby achieving a great promoting effect on the energy conservation and emissions reduction and benefit increasing of enterprises; through an anaerobic reaction, the removal rate of COD (chemical oxygen demand) is 90%, thereby ensuring the effect of wastewater treatment and up-to-standard release.

The invention discloses a pressure self-adaptive switching hydraulic logic control device for main and auxiliary hydraulic cylinders. The pressure self-adaptive switching hydraulic logic control device comprises the main cylinder and the auxiliary cylinder, wherein the main cylinder and the auxiliary cylinder are parallelly and rigidly connected on a load, a first electromagnetic directional valve is connected to the main cylinder, a pressure regulating valve, a throttling valve and a second electromagnetic directional valve are sequentially connected to the auxiliary cylinder, a first logic valve and a second logic valve are respectively connected between the pressure regulating valve and the auxiliary cylinder, and the first logic valve is connected between the main cylinder and the first electromagnetic directional valve. The pressure self-adaptive switching hydraulic logic control device can completely achieve functions achieved in an existing control mode, the links easily causing faults are decreased, the problems including slippage and the like occurred in quiver, switching impact and a static state are eliminated by relying on the intrinsic rapidity, sensitivity and reliability of pressure self-adaption, and the main and auxiliary hydraulic cylinders are smoother to switch and greatly meet the working condition requirements of the pressure self-adaptive switching hydraulic logic control device.