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

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.

The present invention describes a carburetor (8) which comprises an air inlet (2) including a mechanically adjustable air valve (3), a mechanically adjustable sprayer that connects the air inlets, and a mechanically measuring device that is connected to the air valve and the sprayer and sustains the stoichiometric ratio between the amount of the air and the fuel. Besides, the vaporizer comprises a fuel pressure adjusting device (13) which affects the fuel pressure according to one or more than one power engine load parameter, and under the fuel pressure the vacuum suction feeding pipe (12) communicating the air inlets (2) obtains the vacuum signal in the air inlet. The fuel pressure is adjusted according to the measured vacuum signal and the discharging of unburnt fuel is reduced under certain dynamic conditions of the internal combustion engine.

The invention relates to a two-in-one cylinder horizontally-opposed double-crankshaft engine. The engine comprises an engine spindle, and a first crankshaft spindle and a second crankshaft spindle are symmetrically connected to the two sides of the spindle respectively. The spindle, the first crankshaft spindle and the second crankshaft spindle are sleeved with a spindle gear, a first crankshaft gear and a second crankshaft gear respectively, wherein the spindle gear, the first crankshaft gear and the second crankshaft gear are meshed with one another. The first crankshaft spindle drives first pistons through first crankshaft sets and first connecting rods, and the second crankshaft spindle drives second pistons through second crankshaft sets and second connecting rods. The first pistons and the second pistons are arranged on the two sides of each air cylinder sleeve. Air intake and exhaust systems and oil injection ignition devices are arranged on the middle side walls of the air cylinder sleeves. The two-in-one cylinder horizontally-opposed double-crankshaft engine has the advantages that through the internal combustion engine, the heat losses are greatly lowered, the acting peak value of each cylinder is twice that of an original cylinder, the effective pressure of the pistons is increased, more oil can be saved by the engine, two original sets of air exhaust, air inlet, ignition and oil injection devices are combined into one set, the weight is lowered, the cost is saved, operation is stable and vibration is small.

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.

The invention relates to a metal mold for manufacturing an aluminum bronze explosion-proof hammer, which includes a horizontally divided upper half mold and a lower half mold; A lower mold half-cavity corresponding to the upper mold half-cavity is provided, an upper half-core is arranged in the center of the top surface of the upper mold half-cavity, and a lower half-core is arranged in the center of the bottom surface of the lower mold half-cavity; The outside of the explosion-proof hammer head cavity is located on the parting surface of the upper half and the lower half, and an exhaust channel is provided; the upper half is provided with an upper pressure head; the center of the lower half is provided with a material storage cavity, the bottom of the storage cavity is provided with a lower pressure head; a flow channel is provided between the storage cavity and the lower mold half cavity. The present invention also relates to a method for manufacturing an aluminum bronze explosion-proof hammer by using the above-mentioned metal casting mold, so as to solve the problems of low density, coarse structure and easy jumping during use of the aluminum bronze explosion-proof hammer produced by the existing casting technology.

The invention discloses an ultrasonic-assisted powder forming method in a fluid environment. Firstly, the powder particles are formed under the action of hydrostatic pressure, so that the density of the powder compact reaches about 80% of its theoretical density, and the hydrostatic pressure is kept applied and introduced Ultrasonic power makes the powder compact further compacted and stress homogenized under the action of ultrasonic vibration. The present invention improves the fluidity and filling performance of powder particles by introducing power ultrasound into the hydrostatic pressure forming process of powder particles, reduces the pressure required for compaction, and can improve the density distribution uniformity of the formed compact at the same time, thereby reducing the powder density. The residual stress of the body compact increases its mechanical properties. At the same time, the viscosity of the fluid medium can be significantly reduced and the fluidity of the fluid medium can be improved by using the mechanical vibration generated when the ultrasonic wave propagates in the oil medium, the ultrasonic cavitation effect, and the thermal effect generated by the medium absorbing the sound wave.

The invention relates to the technical field of powder material pressing molding and provides a powder material pressing molding safety device under the assistance of ultrasonic vibration. The device comprises an ultrasonic base, an ultrasonic die sleeve installed on the ultrasonic base, an ultrasonic punch used in cooperation with the ultrasonic die sleeve, a hydraulic machine driving the ultrasonic punch, a first ultrasonic transducer and a transducer connecting part. By means of the technical scheme, inner friction among powder material particles and outer friction between the particles and the side wall of the ultrasonic die sleeve are lowered, the effective pressure of different layers of grains is improved, densification of powder material parts is effectively improved under existing moderate molding conditions, internal density uniformity is improved, internal stress is reduced, and therefore the grains can be molded and manufactured with high quality.

The invention discloses a manufacturing process of a high-strength polycrystalline diamond wire drawing die by vacuum secondary hot pressing. The insert is obtained by vacuum secondary hot pressing of metal powder: The pressure is 20-45MPa, the temperature is raised to 500-550°C at a rate of 20-30°C / min, the temperature is kept for 10-20min, the temperature is raised to 600-650°C at a rate of 10-15°C / min, and the heat is kept for 10-15min , hold the pressure for 15-20 minutes and cool to obtain a wire drawing die. The invention adopts the method of vacuum secondary hot pressing to improve the density of the material; it can eliminate the elastic strain in the cold pressing process and reduce the adverse effect of size increase after demoulding; the vacuum sintering is neutral sintering without oxygen and reducing gas , so that the obtained wire drawing die insert fits closely with the die core and the steel sleeve; the secondary hot pressing makes the particles fully fill in the gap of the sintered body, improving the utilization rate of the die.

The invention relates to a method for manufacturing a beryllium bronze explosion-proof hammer, which is formed by a metal mold, and the metal column includes an upper half mold and a lower half mold that are horizontally split; the upper mold half is provided with an upper mold half cavity, the lower mold half cavity is correspondingly provided with a lower mold half cavity corresponding to the upper mold half cavity, and an upper half core is arranged in the center of the top surface of the upper mold half cavity, and the lower mold half cavity The center of the bottom surface is provided with a lower half core; the outside of the explosion-proof hammer head cavity is provided with an exhaust channel on the parting surface of the upper half type and the lower half type; the upper half type is provided with an upper pressure head; the The center of the lower half mold is provided with a material storage cavity, and the bottom of the material storage cavity is provided with a lower pressure head; a flow channel is provided between the material storage cavity and the lower mold half cavity. The invention also relates to a method for manufacturing a beryllium bronze explosion-proof hammer by using the above-mentioned metal casting mold, so as to solve the problems of low density, coarse structure and easy jumping during use of the beryllium bronze explosion-proof hammer produced by the existing casting technology.