30results about How to "Increase effective pressure" patented technology

The invention relates to a method for producing powder smelt screw ratchet, which comprises: mixing the materials, compressing molding, sintering, compressing and shaping, to obtain the ratchet. The invention also discloses a relative mould, which is formed by a compressing upper punch, compressing middle mould, compressing lower punch; the upper part of lower punch has the inner screw tooth matched with the outer screw tooth; the upper punch is sliding matched with the middle mould; the middle mould is sliding matched with the lower mould; the compressing core rod has compressing core rod, friction plate, and rotation element; the upper part of compressing core rod has outer screw tooth; the lower end of core rod and the upper end of rotating element have friction plate between them, while their contact surface has lubricant. The invention, via the rotation of core rod, realizes the one-time molding and demoulding of inner screw ratchet, to improve the yield and reduce the cost.

A low-head impulse jet waterwheel for power generation at irrigation canal drop structures and navigation dam spillways achieves renewable electric power generation that has been lost until now due to lack of suitable equipment to convert such energy at competitive cost. Conventional practice has limited use of impulse turbines to heads of more than 50 meters or about 150 feet. However, there is now no need for such a limitation. Kinetic energy of a low-pressure jet is employed in a way that enables numerous locations to generate electricity conveniently near points of use, from a renewable source at minimum cost. The equipment can be pre-assembled for minimum installation cost at sites with no existing impoundment and can be automatically raised clear of flood levels with built-in lifting equipment. Existing multi-span bridges offer convenient access for installation and maintenance. Raising the equipment also provides clear passage for fish migration.

The invention relates to a subcritical vapor auxiliary work done gasoline engine which comprises a water injector in a cylinder of the gasoline engine, wherein, the water injector comprises a water tank, an electric control unit, and water pumps, a water guideway, a water injection nozzle and a temperature sensor which are controlled by the electric control unit. The water injector is characterized in that the water pumps comprise a low pressure water pump and a high pressure water pump pressurizing water to be above 200bar, the low pressure water pump is arranged in the water tank and is communicated with the high pressure water pump, the high pressure water pump is communicated with the water guideway by a high pressure water pipe, the water injection nozzle is communicated with the water guideway, and a water injection opening extends into a combustion chamber of the gasoline engine. The gasoline engine also comprises a gasoline engine exhaust pipe used for heating water to above 250 DEG C and not more than 374.2 DEG C, and a high pressure water pipe penetrates through the exhaust pipe and then is communicated with the water guideway. The gasoline engine utilizes the waste heat of engine tail gas to do work circularly, thereby saving oil; the temperature of water injected into the cylinder is in a subcritical state, and the water is instantaneously vaporized in the cylinder under the pressure condition, thereby increasing the explosion pressure of the cylinder; and the torque output and the power are improved under the premise that the oil injection amount is not increased.

The invention discloses a vacuum secondary hot pressing manufacturing technology for a high-strength polycrystalline diamond drawing die. A bushing is obtained by metal powder through vacuum secondary hot pressing, the vacuum degree is 2*10-3-8*10-3 Pa, the pressing pressure is 20-45 MPa, the temperature is increased to 500-550 DEG with the rate of 20-30 DEG C/min, the temperature and the pressure are kept for 10-20min, the temperature is increased to 600-650 DEG C with the rate of 10-15 DEG C/min, the temperature is kept for 10-15 min, the pressure is kept for 15-20 min, and the drawing die is obtained through cooling. The method of vacuum secondary hot pressing is adopted, particles can be scattered and slide through the surface energy and the external pressure, pores in a sintered body are removed, and the compactness of materials is improved; elastic strain in the cold pressing process can be removed, the density of the sintered body can be increased, the elastic failure does not exist, and the adverse influences generated by size increasing after demolding are reduced; the vacuum sintering is neutral sintering of anaerobic and non-reducing gas, combination of interfaces can be improved, and the obtained drawing die bushing is closely attached to a die core and a steel bushing; the gaps of the sintered body can be fully filled with the particles through secondary hot pressing, obtained material cracks are few, and the utilization rate of the die is increased.

The invention relates to a method for manufacturing a beryllium bronze explosion-proof hammer. The method is characterized in that a metal casting mold is used for forming, and a metal column comprises an upper half mold and a lower half mold which are horizontally split; an upper casting mold half cavity is formed in the upper half mold, a lower casting mold half cavity corresponding to the uppercasting mold half cavity is correspondingly formed in the lower half mold, an upper half core is arranged in the center of the top surface of the upper casting mold half cavity, and a lower half coreis arranged in the center of the bottom surface of the lower casting mold half cavity; an exhaust channel is formed in the position, positioned on the parting surface of the upper half mold and the parting surface of the lower half mold, of the outer side of an explosion-proof hammer head cavity; an upper pressing head is arranged on the upper half mold; a material storage cavity is formed in thecenter of the lower half mold, and a lower pressing head is arranged at the bottom of the material storage cavity; and a flow channel is formed between the material storage cavity and the lower casting mold half cavity. The invention further relates to the method for manufacturing the beryllium bronze explosion-proof hammer by utilizing the metal casting mold, so that the problems that the density is low, the structure is thick and large, and blocks are prone to jumping in the using process in the process of producing the beryllium bronze explosion-proof hammer by an existing casting technology are solved.

The invention provides a nano filming plugging agent for a drilling fluid. The nano filming plugging agent comprises the following components: silicon oxide, polyurethane granules, a dispersant and analcohol. By controlling proportions and preparation processes of raw materials, the prepared nano filming plugging agent for the drilling fluid is an odorless white liquid, the density is 1.05g/cm<3>, the granularity of solid particles is 50-400nm, the nano filming plugging agent for the drilling fluid is compressed in the surface of a wall well or microcracks of mud shale to form a semi-permeable isolation film, that is, a complete protection layer is formed on the wall well, fluids can be prevented from entering a stratum, effective pressure can be increased, ineffective pressure can be reduced, a wall well stabilizing function can be effectively brought into play, the drilling fluid blocking capability can be improved, the filter loss of the drilling fluid can be reduced, the quality and plugging performance of mud cakes can be improved, the inhibition of the drilling fluid can be improved, a liquid in a shaft can be prevented from entering stratum pores and cracks, the probabilityof differential pressure adhesion and tool jamming can be reduced, and in addition, the nano filming plugging agent is simple, convenient and easy in control of preparation processes, convenient andrapid to use, and high in popularization and application value.

The invention provides a contraposition double-eccentric-wheel sliding groove push-pull reciprocating compressed air pressurizing homogeneity compression ignition internal combustion engine. The eccentric distance of a rotating double-eccentric-wheel serves as a reciprocating stroke to drive pistons to complete air suction, compression, acting pressure gas discharging, pressurized air is supplied to a coaxial double-eccentric-wheel sliding groove type power output internal combustion engine, and the pressurized air flows quickly into all air cylinders of the internal combustion engine through an air intake branch; the air flowing into the air cylinder is the pressurized air 2-5 times larger than the atmospheric pressure, the air exchange efficiency, air inlet density, air inflation and effective internal combustion engine pressure are greatly improved, and the internal combustion engine is a real pressurizing homogeneity compression ignition two-stroke internal combustion engine; even numbers of air cylinders are correspondingly arranged in pairs and evenly embedded into the periphery of the same circular-ring-shaped cylinder body; the inner circle center is the rotating double-eccentric-wheel sliding groove provided with an integrated power shaft and precisely assembled to and connected with a T-shaped sliding mechanism at a big end of connection rod in a sliding mode to transfer power, the rotating double-eccentric-wheel sliding groove provided with the integrated power shaft rotates by a circle, the big end of the connection rod slides in a limiting sliding groove with the eccentric distance as the stroke, and all the air cylinder pistons are pushed and pulled by two reciprocating strokes, in other words, the pistons act twice when the power shaft rotates by a circle.

The invention discloses a horizontally-opposed-cylinder, opposed-piston and two-stroke homogeneous compression-ignition reciprocating engine and linear generators. Two pistons are arranged inside each of two parallel cylinders for doing work oppositely; four blast pump pistons, of which the effective area is 2-3 times greater than that of the work-doing pistons, are arranged behind the four pistons, and are used for supplying pressurized mixed fuel gas to the cylinders; four coaxial linear generators are arranged behind four blast pumps; shaft heads behind the four generators are connected with two interconnecting fulcrums of two semicircular rocker mechanisms fixed to central vertical shafts at the two ends of the two cylinders; when the two pistons in one cylinder move towards a combustion chamber, which is shared by the two pistons, in the center of the cylinder, the two pistons in the other cylinder move oppositely to the two ends of the cylinder; when the two pistons in one cylinder move up to 5-10 degrees in front of an upper stopping point, mixed fuel catches fire and bursts out through compression ignition to force the two pistons to rapidly move towards a lower stopping point, push the coaxial blast pumps to blast air, push the generators to generate electricity and push the two semicircular rocker mechanisms to rotate in the reverse direction so as to push the two pistons in the other cylinder to do compression work on the upper stopping point at the center of the cylinder.

The invention relates to an internal combustion engine and provides a repeated pressure boosting internal combustion engine which can separately complete an energy conversion process and is high in energy utilization efficiency, low in fuel consumption rate and high in speed, torque and power. According to the main principle of the repeated pressure boosting internal combustion engine, the suction process, the compression process, the acting process and the exhaust process are separately conducted in two air cylinders which are different in size, effective pressure in the air cylinders is increased at the time of acting through self structures, as a result, the combustion process is improved, and thermal efficiency is also improved; moreover, matched with a turbocharger, a compression air cylinder 2 can suck in more air in a high speed stage to support the combustion of fuel. The repeated pressure boosting internal combustion engine has the advantages of being simple in structure, high in thermal efficiency, wide in operation adjustable range, low in oil consumption, good in acceleration performance, sufficient in power at a low speed, and strong in power at a high speed; moreover, acting frequency is doubled, the rotating speed range is substantially expanded, and therefore vibrations are reduced; due to the supercharged effect after combustion, the combustion process is improved, the fuel can be combusted more sufficiently and thoroughly, and the emission performance is better.

The invention provides a reverse osmosis membrane filter element and a water purifier. The reverse osmosis membrane filter element comprises a central shaft; water inlet pipes, wherein the sidewall ofeach water inlet pipe is provided with at least one raw water outlet, at least one end of each water inlet pipe forms a raw water inlet, and a plurality of the water inlet pipes are arranged around the central shaft to form a central pipe group; and at least one reverse osmosis membrane module, wherein reverse osmosis membranes in the reverse osmosis membrane module are configured to pass throughspace between the central shaft and the water inlet pipes, and are rolled around the central pipe group to form a main filter element body having an inflow water passage and a produced water passage,the inflow water passage is in communication with the raw water outlets, a concentrated water out is formed in one side, away from the water inlet pipes, of the inflow water passage, and a pure wateroutlet is formed in at least one of the two sides, along the axis direction of the central pipe group, of the produced water passage. The reverse osmosis membrane filter element and the water purifier of the invention have high water making efficiency and good anti-pollution performance.

An internal combustion engine comprising a crankshaft rotatable about an axis, one or more pairs of cylinders opposed from each other on either side of the crankshaft, one or more pairs of pistons alternately moveable within the cylinders by combustion therein, and a common rod connecting the pair of pistons, the pistons and common rod being linearly slideable in a first direction. A linear bearing is disposed on the common rod between the pair of pistons and connects the common rod to the crankshaft, the linear bearing being slideable in a second direction normal to the first direction. As the pair of pistons alternately move within the cylinders, the crankshaft is driven by movement of the common rod and pair of pistons back and forth in the first direction and movement of the linear bearing back and forth in the second direction.

The invention discloses an ultrasonic auxiliary powder forming method in the fluid environment. Firstly, powder particles are formed under the action of hydrostatic pressure, the density of powder pressing blanks reaches about 80% of the theoretical density of the powder pressing blanks, application of the hydrostatic pressure is kept, power ultrasounds are introduced, and the powder pressing blanks are further densified and are uniform in stress under the ultrasonic vibration action. According to the ultrasonic auxiliary powder forming method in the fluid environment, the power ultrasounds are introduced in the powder particle hydrostatic pressure forming process, mobility and filling performance of the powder particles are improved, and the pressure needed for densification is reduced; and meanwhile, the density distribution uniformity of the formed pressing blanks can be improved, accordingly, residual stress of the powder pressing blanks is reduced, and the mechanical performance of the powder pressing blanks is improved. Meanwhile, the mechanical vibration action generated during spreading of ultrasonic waves in an oil medium, the ultrasonic cavitation effect, the heat actiongenerated due to sound wave absorption through the medium and the like are utilized, viscosity of the fluid medium can be obviously reduced, and the purpose of improving mobility of the fluid medium is achieved.

The invention relates to the technical field of bittern production, in particular to a dissolving cavity groove-construction method for a tertiary-system stratum ultra-deep connection brine mining well. The dissolving cavity groove-construction method for the tertiary-system stratum ultra-deep connection brine mining well comprises the following steps of: establishing an ultra-deep connection wellgroup; injecting fresh water mud, and establishing well group circulation; gradually lowering the concentration of the fresh water mud, meanwhile, regulating a circulation displacement of the fresh water mud, and carrying out dissolving cavity groove construction; and when the concentration of the fresh water mud is lowered to a preset numerical value, replacing the fresh water mud with clear water, and carrying out dissolved brine circulation, and carrying out normal brine mining work. When the method provided by the embodiment of the invention is adopted, well bottom effective pressure canbe improved, and stratum stress is gradually released to avoid a situation that a stratum suddenly loses stability and collapses on a large area to block a channel. Meanwhile, salt bed creepage and hole shrinkage can be alleviated so as to gradually enlarge a horizontal channel, transition from mud to clear water is successfully finished during a groove-construction period of the ultra-deep connection well group, and therefore, the normal brine mining of the ultra-deep connection well group is successfully realized.

The invention relates to a metal casting mold for manufacturing an aluminum bronze explosion-proof hammer. The metal casting mold comprises an upper half mold and a lower half mold which are horizontally parted, wherein an upper casting mold half cavity is formed in the upper half mold; a lower casting mold half cavity corresponding to the upper casting mold half cavity is correspondingly formed in the lower half mold; an upper half core is arranged in the center of the top surface of the upper casting mold half cavity; a lower half core is arranged in the center of the bottom surface of the lower casting mold half cavity; an exhaust passage is formed in the parting surface of the upper half mold and the lower half mold on the outer side of an explosion-proof hammer head cavity; an upper pressure head is arranged on the upper half mold; a storage cavity is formed in the center of the lower half mold; a lower pressure head is arranged at the bottom of the storage cavity; and a runner isarranged between the storage cavity and the lower casting mold half cavity. The invention further relates to a method for manufacturing the aluminum bronze explosion-proof hammer by using the metal casting mold, so that the problems of low density, thick and large structure and being prone to block jumping in use in the production of the aluminum bronze explosion-proof hammer head in the prior art of casting are solved.

A fuel valve for injecting fuel into the combustion chamber of a large two-stroke self-igniting internal engine combustion engine, with a valve needle that is resiliently biased towards a valve seat. The effective pressure surface that causes fuel pressure to urge the valve needle in the opening direction increases significantly when the valve needle has lift from the valve seat. A supplementary effective pressure surface is provided on the valve needle. The supplementary effective pressure surface creates a force urging the valve needle towards the valve seat when the supplementary effective pressure surface is exposed to fuel pressure.