77results about How to "Meet the requirements of working conditions" patented technology

The invention discloses a production method for Al-alloy cylinder. A series of problems that surface finish of cylinder inner face machined by prior production method is not fit to technology and use demand of cylinder, internal combustion engine scuffs cylinder easily, the stability of cylinder is bad and life time is short, are solved. The primary scheme is that cavity of Al-alloy cylinder is machined mechanically; the cavity surface machined mechanically is treated with micro arc oxidation in alkaline solution by DC pulse power supply to form alumina ceramic layer; the layer is washed and dried; the layer is machined mechanically and washed thereafter.

The invention designs a composite material. The composite material comprises carbon-fiber perform, matrix carbon, filler and diamond-like carbon, wherein the matrix carbon is uniformly adhered on the carbon fiber of the perform to form the carbon-fiber perform with the matrix carbon; the filler fills the inside of the carbon-fiber perform with the matrix carbon and coats the outside of the carbon-fiber perform with the matrix carbon to form a semifinished product; the diamond-like carbon comprises a diamond-like carbon layer coated on the semifinished product; and the filler contains a Ti element, a Si element, a C element and a Mo element. The composite material has the advantages that a method of combining four processes of CVI, SI, RMI and PECVD to prepare a finished product with the advantages of high compactness, low thermal expansion coefficient and friction coefficient, high self-lubricating property, high thermal conductivity, oxidation resistance, thermal shock resistance, ablation resistance, wear resistance, high strength and toughness and the like; and simultaneously, the process is simple, the preparation period is short, the equipment requirement is low, the cost is low, net shaping can be realized and convenience is brought for large-scale industrial application.

The invention relates to an adjustable integrated high-voltage grid electrode pulse modulator. An improved design is conducted on a filament high potential power supply circuit, a positive biased high potential power supply circuit, a negative biased high potential power supply circuit and a grid electrode pulse modulator circuit, and the high dense integration of the three high potential power supply circuits and the grid electrode pulse modulator circuit is achieved; a feedback circuit of a high potential power supply is improved, a magnetism feedback high voltage isolation sampling technology is adopted, and respectively independent adjustment to the high potential power supply output voltage values is achieved at the low voltage side; a high potential integrated failure detecting circuit is added, and the high potential power supply multi-circuit failures are integrated into one circuit signal; a pulse driving circuit is improved, and a dual-level denoising circuit is added; a grid electrode floating plate modulating circuit is improved, and an fire-making resistance protection circuit protection modulator and a traveling wave tube are added; a high-voltage transformer structure used for the modulator is improved, the size is reduced, and high-voltage isolation is achieved.

The invention relates to the technical field of ethylene propylene rubber sealing pads, in particular to a high-temperature-resistant ethylene propylene rubber sealing pad and a preparation method and application thereof. The high-temperature-resistant ethylene propylene rubber sealing pad is made from ethylene propylene copolymer, furnace carbon black, spray carbon black, zinc oxide, aluminum oxide, a vulcanizing agent, an assistant cross-linker, an anti-aging agent and the like, wherein fully saturated ethylene propylene copolymer is used as a rubber raw material, and the prepared high-temperature-resistant ethylene propylene rubber sealing pad has excellent weatherability, dielectric resistance and temperature tolerance, may be used for a long time at 150 DEG C and may be used temporarily or intermittently at 180 DEG C, fatigue resistance and high-temperature aging resistance of the traditional ethylene propylene rubber sealing pad are improved, and the problems of the prior art that high-temperature fatigue performance is low and the use at 150 DEG C is only temporary or intermittent are solved.

The invention provides environmentally-friendly energy-saving-type heavy loading screw compressor oil. The environmentally-friendly energy-saving-type heavy loading screw compressor oil comprises 90-95% of composite base oil and 10%-5% of other additives in percentage by weight. Poly Alpha-Olefins (PAO) and dioctyl sebacate are compounded to serve as the base oil of the environmentally-friendly energy-saving-type heavy loading screw compressor oil. The environmentally-friendly energy-saving-type heavy loading screw compressor oil provided by the invention has the advantages of good operating characteristics, long service life and good biodegradability and also has effects of improving the efficiency of a screw compressor, reducing the abrasion and corrosion of a screw, effectively prolong the service life and the oil draining period of the screw compressor and meeting the requirements under special service conditions. The environmentally-friendly energy-saving-type heavy loading screw compressor oil provided by the invention is not only suitable for the requirements of various middle-heavy loading screw compressors under service conditions, and but also can meet the lubrication, cooling and sealing requirements of the middle-heavy loading sliding vane compressors.

The invention discloses low-pressure-variation ethylene-propylene rubber mixed compound which is made of, by weight, 100 parts of ethylene-propylene-diene-terpolymer rubber, 4-6 parts of zinc oxide, 40-60 parts of carbon black, 15-25 parts of white carbon black, 1.5-5 parts of anti-aging agent, 0.4-2.0 parts of polyethylene wax, 20-50 parts of paraffin oil, 2-5 parts of DCP (dicumyl peroxide) and 0.5-2 parts of accelerant. The low-pressure-variation ethylene-propylene rubber mixed compound is low in pressure variation under standard temperature and time and can completely meet requirements of operating conditions.

The invention discloses a pantograph damper damping throttling device. One end of an oil cylinder is sealed through a guide bearing. A center hole is formed in the guide bearing which provides supporting and guiding for a piston rod. The other end of the oil cylinder is sealed through a bottom valve seat. A piston, a spring base, springs, a compression valve plate, an stretchable spring valve plate and a stop plate are installed on the piston rod. The oil cylinder is divided into a first cavity and a second cavity through the piston. Stretchable throttling holes and compression throttling holes are formed in the piston, wherein the stretchable throttling holes and the compression throttling holes are oppositely arranged. The compression valve plate located at the position, close to the end face of one side of the first cavity of the oil cylinder, of the piston covers the compression throttling holes and is pressed through the springs, and the springs are fixed on the spring base. The stretchable spring valve plate located at the position, close to the end face of one side of the second cavity of the oil cylinder, of the piston covers the stretchable throttling holes and is pressed through the stop plate, and the stop plate is fixed on the piston rod through a locking nut. The pantograph damper damping throttling device can overcome the technical defect that in the prior art, when the piston rod is stretched to the final stroke, damping force can not be adjusted and controlled at will.

The invention discloses an integrated electro-hydraulic proportional hydraulic valve bank, which includes an oil inlet pair and a unit basic pair that are matched in an adhering way, wherein the oil inlet pair is internally provided with a pilot-operated reducing valve and a first safety valve; the inlets of the pilot-operated reducing valve and the first safety valve are connected with a pressure oil passage; the outlet of the pilot-operated reducing valve is connected with a pilot oil passage, and the outlet of the first safety valve is connected with an oil return passage; the unit basic pair is internally provided with unit proportional reversing valves, and unit electromagnetic proportional reducing valves are mounted at the two drive ends of each unit proportional reversing valve; the pressure opening of each unit proportional reversing valve is connected with the pilot oil passage; the proportional speed regulation superimposition and multiple actuating mechanisms are adopted, and the proportional flowrate distribution during the linkage operation is free from the influences of the external load variation and the maximum pump output; the pressure stabilizing oil source arranged on the oil inlet pair provides a pilot oil source for the system; and by adopting the electromagnetic proportional reducing valve on the two sides of the basic pair to control the pushing of the valve rod, the electric signals are converted into hydraulic force, and the repeatability precision is high.

The invention discloses a safe nuclear reactor shell high-entropy alloy material and a preparation method thereof. The high-entropy alloy material consists of five elements of Al, Cr, Fe, Mo and Nb, wherein the atomic percentage of the element aluminum is 4%-8%, the atomic percentage of the element chromium is 8%-13%, the atomic percentage of the element iron is 25%-30%, the atomic percentage of the element molybdenum is 20%-35%, and the atomic percentage of the element niobium is 25%-30%. According to the high-entropy alloy material and the preparation method thereof, a mother alloy button ingot is obtained in a vacuum arc smelting mode; the alloy has a relatively high melting point, and can be used in a high-temperature environment; and due to the fact that no zirconium element is used in the experiment, explosive hydrogen cannot be generated under the extreme high-temperature condition, so that the use safety is greatly improved.

The present invention discloses casting process and structure of composite toothed plate for crusher. The present invention has altered casting partition structure and thus altered distribution of high-chromium alloy cast iron layer and carbon steel in the work surface, raised inherent tooth toughness, increased coupling force of two kinds of alloy and obtained composite toothed plate with work surface of high-chromium alloy cast iron layer and processing surface of carbon steel layer. The composite toothed plate has dove tail tenon, lower part of the arced plate and inner layer of the teeth made of carbon steel, and upper part of the arced plate and the outer layer of the teeth made of alloy cast iron layer, and is suitable for production.

The invention discloses a piston dust shield material for an automobile braking system and a preparation method thereof. The material comprises the following raw materials in parts by weight: 50-180 parts of silicon rubber, 0.5-2 parts of vulcanizing agent, 0.1-0.4 part of pigment A and 0.4-1.5 parts of pigment B. The preparation method comprises the following steps: soaking a frame into an adhesive, forming raw materials, preheating the frame, and carrying out two-time sectional vulcanization. The piston dust shield material disclosed by the invention has the advantages of excellent high/low temperature resistance, favorable ductility, tear resistance, low compressive deformation and resistance to various greases, conforms to the requirements for working conditions of automobile braking air valves, and can be completely used instead of imported parts.

The invention discloses a damping-variable steel wire rope torsional force release device. The damping-variable steel wire rope torsional force release device comprises an upper cavity housing, a lower cavity housing, an upper cavity and lower cavity connecting assembly and a damping adjusting mechanism, wherein the upper cavity housing and the lower cavity housing are cylindrical, arranged oppositely up and down, connected with each other through the upper cavity and lower cavity connecting assembly, and used for being connected with ends of a steel wire rope; and the damping adjusting mechanism is installed in the upper cavity housing and located between the upper cavity and lower cavity connecting assembly and the upper cavity housing, and used for adjusting the rotation speed when the torsional force of the steel wire rope is released. The damping-variable steel wire rope torsional force release device can be directly installed on the steel wire rope, and can release the torsional action force generated by the rope in the operation process stably in time, the operation is simple, easy to implement and reliable, the defect that the torsional action force of the rope cannot be released or is released too fast in the working process to cause reverse breaking is overcome, the problem of the poor working condition of the rope is solved, the service life of the rope is prolonged, and the using safety of the rope is improved.

The invention provides a tank container and an end frame thereof. The end frame comprises two columns, a lower saddle seat, base corner members arranged at bottoms of the two columns and top corner members arranged at top ends of the two columns; the top surfaces of the top corner members are provided with hoisting holes; the bottom surfaces of the base corner members are provided with bolt fixing holes; the lower saddle seat is positioned between the two columns and two ends of the lower saddle seat are fixed to or integrated at the middle zone or lower position of the two columns; the lower saddle seat is provided with a recessed arc supporting surface which is used for supporting the bottom wall of the tank; supporting members are connected to the two columns and/or one side facing the lower saddle seat and the lower saddle seat. The tank container end frame solves the problem of effective connection between a tank and an end frame which cannot be connected through welding so that the tank container can bear the loads of use conditions such as transportation, hoisting and stacking and the function is guaranteed to realize.

The invention discloses a blade leading edge double-rotational-flow impingement cooling experiment testing system and method. The system comprises a main flow channel, a blade leading edge experiment section, a secondary flow cooling system and an infrared thermal imaging system. Heated air is introduced into an inner cavity of the main flow channel, and an outlet of the main flow channel is connected with the blade leading edge experiment section; a blade leading edge double-rotational-flow impact experiment piece is placed in an inner cavity of the blade leading edge experiment section; the secondary flow cooling system comprises an air branch and a high-density gas branch, an outlet of the air branch and an outlet of the high-density gas branch are connected with a gas collection chamber, an outlet of the gas collection chamber extends into an inner cavity of the blade leading edge double-rotational-flow impact experiment piece, and a first ball valve is arranged on the outlet of the gas collection chamber; and the infrared thermal imaging system monitors the surface temperature field distribution of the blade leading edge double-rotational-flow impact experiment piece. The system is simple in structure, low in cost and convenient to build, and provides a reference basis for advanced cooling design of gas turbines in the future.

The invention discloses a low-power sine wave motor, which comprises a housing and a hall circuit board, wherein a rotor (1) and a stator, which cooperatewith each other, are arranged in the housing; a counterweight groove and a magnetic steel caulking groove (5) are sequentially formed in the rotor (1) from inside to outside; the counterweight groove and the magnetic steel caulking groove (5) are formed along the circumferential direction of the rotor (1); a counterweight block (4) is arranged in the counterweight groove; magnetic steel (3) is embedded into the magnetic steel caulking groove (5); a rotating shaft through hole is formed in the hall circuit board; the hall circuit board is arranged on the inner surface of the housing; and meanwhile, a rotating shaft of the rotor (1) passes through the rotating shaft through hole in the hall circuit board. The motor is good in operation, long in service life, low in noise and high in torque.

The invention discloses a piston sealing piece manufacturing process, which comprises the following steps of: 1) performing injection molding on a hard polyurethane material in a die to form a first sealing piece, wherein the first sealing piece comprises an annular body and a sealing part connected to the upper part of the annular body; 2) cutting off the sealing part of the first sealing piece formed in the step 1), and only retaining the annular body; and 3) putting the annular body into the die in the step 1), and performing injection molding on a soft polyurethane material in the die to form a second sealing piece, wherein the second sealing piece comprises the annular body formed by performing injection molding on the hard polyurethane material and a sealing part formed by performing injection molding on the soft polyurethane material, and thus obtaining the piston sealing piece. Compared with the prior art, the piston sealing piece manufacturing process has the advantages that: the annular body of the piston sealing piece is made of the hard polyurethane material, and the sealing part is made of the soft polyurethane material, so that the piston sealing piece has a simple structure, and can meet a low-friction requirement on the sealing part and a high anti-squeezing capacity requirement on the annular body and totally accord with the actual working condition requirement.

The invention discloses a rubber spring material for an automobile braking double-cavity serial brake valve and a preparation method thereof. The rubber spring material comprises the following raw materials in parts by weight: 80 to 120 parts of natural rubber, 4 to 6 parts of activating agent, 1 to 3 parts of lubricating agent, 0.3 to 0.8 part of antiscorching agent, 2 to 4 parts of vulcanizing agent and 75 to 125 parts of carbon black. The preparation method comprises the following steps of: performing hybrid forming on the raw materials; vulcanizing; removing edges through punching; and detecting. The prepared rubber spring material for the automobile braking double-cavity serial brake valve has the advantages of high strength, tear resistance, low compressive deformation, brake fluid resistance and superior aging resistance; qualification rate and production efficiency of a product can be guaranteed by using a vulcanization molding process; and a domestication process of high-end automobile parts is accelerated.

An optimal distribution network measurement configuration method based on improved 0-1 integer programming is disclosed. which includes: introducing the relevant theories and methods of 0-1 integer planning into the optimal configuration of the distribution network measuring device, and effectively realize the optimal configuration of the distribution network measuring device according to the economic environment factors, network nature factors and related constraints of the distribution network. The method is of great significance for the analysis and calculation of the optimal configurationof the distribution network measuring device.

The invention relates to the technical field of rail transit, in particular to a prefabricated frame plate and an application method thereof, open holes are formed in the plate middle and the plate end of the prefabricated frame plate respectively, notches are formed in the positions of the open holes in the plate middle and the open holes in the plate end of the prefabricated frame plate, and the notches are used for installing cover plates. The device has the advantages that the structure is simple and reasonable, and installation is convenient; the use is convenient, and particularly, the built-in pump room structure is convenient to maintain and overhaul; the ballast bed evacuation function is not influenced; the requirements of using working conditions such as a built-in pump room section and drainage transition sections on the two sides of the floating slab can be met, the application range is wide, the expansibility is high, and the method is suitable for popularization.

The invention provides a separable hanger sealing sleeve device. Bidirectional sealing is formed between the inner diameter of a casing head and the outer diameter of a hanger body, and the bidirectional sealing is contracted between a connecting plate and a bottom plate or a pressing plate before a sealing ring is lowered, so that a sealing sleeve device is smooth in lowering, and free of jammingphenomenon and convenient to install, and the embedded sealing sleeve device forms the bidirectional sealing by utilizing an excitation assembly, so that the assembly and the maintenance are convenient, meanwhile, a sealing element can be designed to be rubber sealing or metal sealing as well, the type of the sealing ring can be selected according to actual working conditions, the cost is reduced, and meanwhile the requirements of the working conditions can be met as well.

The invention discloses a multifunctional sludge formation slitting machine and relates to the field of sludge drying. The upper portion of a forming cavity is connected with a feeding device. The forming cavity serves as a supporting structure and a running space and is internally provided with two sets of forming engagement rollers. Each set of forming engagement roller is formed by connecting adrive wheel and a driven wheel side by side in a gear-engaged mode. The forming engagement rollers are connected with electrical control devices used for enabling the forming engagement rollers to rotate and controlling the rotation number of the forming engagement rollers. The upper portions of the forming engagement rollers are connected with a telescopic device, and the telescopic device comprises a telescopic rod and drooping flat scrapers evenly connected to the telescopic rod. The telescopic rod drives the drooping flat scrapers to move back and forth, so that viscosity of materials isoffset, the materials can be supplied continuously, the telescopic rod is connected with a cylinder device, and the cylinder device is connected with the forming cavity through a fixing device. According to the multifunctional sludge formation slitting machine, required shapes before sludge enters a drying machine are met, the drying efficiency is greatly improved, meanwhile, sludge of different types can be processed correspondingly through the identical drying machine, and the application range is extended.

The invention discloses a double-stepping servo guide belt control system. The double-stepping servo guide belt control system comprises stepping motors, ribbon reels and a controller, wherein the stepping motors and the ribbon reels are both provided with two, the stepping motors are connected to the ribbon reels in a bearing mode, and the stepping motors are electrically in connection with the controller; and the controller is internally provided with a position speed servo control mode, a speed torque servo control mode and a position speed open loop control mode. According to the double-stepping servo guide belt control system, the two motors are adopted independent servo control modes and do not depend on other sensors or circuits to assist in measuring the tension of a ribbon, so that the mechanical mechanism and the circuit design are simplified.