50results about How to "Reduce blowby" patented technology

The invention discloses a self-generated mixed particle-reinforced aluminum alloy cylinder sleeve and a preparation method thereof. The self-generated mixed particle-reinforced aluminum alloy cylinder sleeve comprises an aluminum alloy and certain amounts of Ni and Si. The preparation method of the self-generated mixed particle-reinforced aluminum alloy cylinder sleeve comprises the following steps that in alloy solidification, Al3Ni particles first separated out from melt can push a part of Si primary crystal particles to move outward with the Al3Ni particles under the action of a centrifugal force; a cannular blank casting is obtained, wherein the cannular blank casting has an outer segregation layer containing a mass of primary Al3Ni and Si primary crystal mixed particles, an inner segregation layer containing Si primary crystal particles, and a middle base layer; and the inner segregation layer and the middle base layer of the cannular blank casting are removed by turning and the outer segregation layer having a high volume fraction is left so that the self-generated mixed particle-reinforced aluminum alloy cylinder sleeve is obtained. The self-generated mixed particle-reinforced aluminum alloy cylinder sleeve and an aluminum cylinder can be subjected to compression casting assembly molding and then are processed into an all-aluminum internal-combustion engine through machining and assembling. The self-generated mixed particle-reinforced aluminum alloy cylinder sleeve has light weight, high particle volume percentage content and excellent wear resistance and high-temperature resistance, and can improve engine work efficiency.

The invention relates to a sealing method of a furnace body before the primary coal charging of a newly built coke furnace. The coke furnace comprises a plurality of carbonization chambers and a plurality of combustion chambers which are separated by furnace walls. The sealing method comprises the following steps: closing the carbonization chambers; inserting air compression sealing equipment from a coal charging hole into each carbonization chamber; starting pressure measuring equipment; charging sealing materials by virtue of a charging hopper, and opening air valves to input compressed air into the carbonization chambers through the air compression sealing equipment; after materials are completely sprayed each time, closing the air valves, and standing for a period of time so that the sealing materials enter gaps among wall bricks of the furnace walls and then are thermally expanded and sintered; and checking the situation of pressure inside the coke furnace by virtue of a fire hole and a pressure gauge, and judging whether to continue to carry out air compression sealing operation or not. The sealing method disclosed by the invention can be used for sealing the brick joints of the furnace walls of the carbonization chambers in thermal engineer operation before the primary coal charging, thereby mending the leaks among the brick joints, checking the sealing property of each carbonization chamber and preventing the phenomenon of smoking of the chimney of the coke furnace from being generated during the primary coal charging.

A air moisture transform device which is used in proton exchanging film fuel cell includes power part, moisture transform part, it characterized in that: said air moisture transform device also includes diversion part; the power part includes timing motor and motor controller, the moisture transform part comprises fixed end plate(201) equipped with supporting seat, floating end plate, moisture transform tubular with multi cavity and sealing part, the diversion part(3) comprises shell(301) and screen mesh(303) which is set in the shell(301), the advantages of the invention are: The application range of device is wide, the service life and generate electricity efficiency of proton exchanging film fuel cell can be guaranteed, the cost of maintaining is low.

An evaporation fuel processing device is provide including: a passage; a tank port and a purge port on one end side of the passage; an atmospheric air port on the other end side of the passage; and adsorbent layers filled with adsorbent for evaporation fuel components, provided in the passage; a region provided on an atmospheric air port side of the passage, being constituted of three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, in which a volume of the adsorbent layer is smaller in the adsorbent layer closer to the atmospheric air port, a volume of the separating part is larger closer to the atmospheric air port, and the volume of the separating part located farthest on a tank port side is larger than that of the adsorbent layer located farthest on the atmospheric air port side.

A piston includes a piston body having a longitudinal central axis. A piston head is formed with a plurality of ring grooves and a pair of pin bosses depend from the head and are formed with a pair of pin bores that are centered on a common pin bore axis that intersects the longitudinal axis of the piston. Skirt Portions have outer surfaces with a longitudinal profile that is convexly shaped. A major diameter of the profile lies within ±2 mm of the pin bore axis in both a cold and hot condition.

A piston ring having an outer running face, two flanks and an inner circumferential face is provided. The running face has profiling. The profile of the running face is substantially convexly curved and has an apex. The axial position of the apex varies periodically in the circumferential direction.

A smaller, lighter hydraulic pump or motor is provided with pistons, each of which has a body with a length approximately equal to the axial length of a corresponding cylinder in which the piston to-and-froly moves. A plurality of corresponding lubricating grooves which are circumferentially formed and radially traverse the wall of each cylinder are respectively positioned at positions which are always closed by the axial cylindrical body of each corresponding piston during the whole travel. The lubricating grooves are connected with one another to form a continuous lubricating channel totally positioned in the cylinder, and not connected by the input or output channels of fluid but supplemented by the blowby entering from the valve end of each cylinder. A plurality of sealing parts respectively positioned near the opening of each cylinder provide strong sealing and nearly eliminate the blowby coming from the lubricating channel, thus notably increasing the volumetric efficiency. The formed improved lubrication, combined with the only spring biasing holddown component, can use a variable-angle swash cam arrangement, which does not need not only a dogbone part on the outer end of the piston but also an ordinary swinger which can only nutate.

The present invention provides an evaporation fuel processing device including: a passage formed inside so as to allow a fluid to flow through the passage; a tank port and a purge port formed on one end side of the passage; an atmospheric air port formed on the other end side of the passage; and adsorbent layers filled with adsorbent which can adsorb evaporation fuel components, the adsorbent layers being provided in the passage, wherein a region which is constituted of three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, and in which a total volume of the adsorbent layers is set smaller than a total volume of the separating parts, is provided on an atmospheric air port side of the passage.

In a premixed compression self-ignition engine which is compact but capable of exerting a high output, an intermediate portion of a trigonal link is rotatably supported on a crankpin, a large end portion of a connecting rod is connected to one end portion of the trigonal link, and a swing link swingably supported on a fulcrum shaft is connected to another end portion of the trigonal link. The engine includes: an intake port open to a crank chamber; a reed valve mounted in the intake port; a scavenging port configured to guide fresh air from the crank chamber into a cylinder bore in a downward stroke of a piston; an exhaust port provided in a cylinder head and open to a top portion of the cylinder bore; and an exhaust valve configured to be opened before the piston opens the scavenging port in the downward stroke of the piston.

An evaporation fuel processing device is provide including: a passage; a tank port and a purge port on one end side of the passage; an atmospheric air port on the other end side of the passage; and adsorbent layers filled with adsorbent for evaporation fuel components, provided in the passage; a region provided on an atmospheric air port side of the passage, being constituted of three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, in which a volume of the adsorbent layer is smaller in the adsorbent layer closer to the atmospheric air port, a volume of the separating part is larger closer to the atmospheric air port, and the volume of the separating part located farthest on a tank port side is larger than that of the adsorbent layer located farthest on the atmospheric air port side.

The invention relates to a vertical furnace carbonization chamber with internal gas collection cavities. The vertical furnace carbonization chamber comprises a carbonization chamber, wherein gas collection cavities are arranged at the two ends and / or in the middle of the carbonization chamber along the height direction of the carbonization chamber; coal gas export holes are formed between the carbonization chamber and the gas collection cavities; a convergence gas channel is arranged at the top of the carbonization chamber, is communicated with each gas collection cavity and leads to an ascending pipe; the gas collection cavities, the coal gas export holes and the convergence gas channel can be formed by refractory bricks and can be also formed by welding heat-resisting steel plates. Compared with the prior art, the vertical furnace carbonization chamber has the beneficial effects that 1) the vertical furnace carbonization chamber can be widely used for preparing tar, coal gases and semi-coke through dry distillation of various low-rank coal, is not limited by feed coal granularity requirements, is suitable for lump coal raw materials and is also suitable for pulverized coal raw materials; 2) the pressure in the furnace can be reduced, furnace body blowby can be reduced, the coal gas recovery rate can be increased, the production safety can be improved, and the furnace body life can be prolonged; 3) the amount of coke powder entrained by raw gas produced by the device is smaller, and coal tar and coal gases with higher quality can be produced.

The invention discloses a sparking plug ignition device in a combustion chamber of a small rotary engine and a method, and belongs to the field of small rotary engines. The device provided by the invention comprises a first working chamber, a second working chamber, an ordinary sparking plug, a sparking plug channel, an ignition chamber, sealing sheets and a third working chamber, and further comprises an engine cylinder, a modified sparking plug, a modified sparking plug anode, bushings, a cathode and a triangle rotor. The sparking plug ignition device provided by the invention has the following advantages by removing the ignition chamber and the sparking plug channel: (1) energy loss is reduced and the probability of blow-by of gas between two adjacent cylinders is lowered; and (2) the compression ratio can also be improved without changing the rest of the structure, and the smaller the size of an engine, the greater the increase in the compression ratio. By improving the ignition position from the interior of the ignition chamber to the interior of the combustion chamber, the following advantages are achieved: (1) the flame propagation distance is greatly reduced, and the possibility of knocking and flame quenching of the small rotary engine is reduced; and (2) the direct contact of spark with compressed fresh gas mixture reduces the difficulty in ignition.

A turbocharger includes a compressor housing, turbine housing, and center housing between the compressor and turbine housings. A turbine wheel is disposed in the turbine housing on a turbine shaft. A compressor wheel having a shank is disposed in the compressor housing on the turbine shaft. The shank has outer and reduced portions. The reduced portion has a smaller diameter than the outer portion. A backplate is mounted to the compressor housing adjacent the compressor wheel and defines a stepped cylindrical bore with a maximum diameter portion and a minimum diameter portion having a smaller diameter than the maximum portion. The outer portion is disposed in the maximum portion. The reduced portion is disposed in the minimum portion. The outer diameter of the shank is greater than or equal to the minimum diameter of the backplate, and the stepped cylindrical bore and the shank define a variable width gap.

A piston including at least one insert disposed between an inner surface of a ring belt and undercrown surface, and / or between the inner surface of the ring belt and a pin boss, to provide reinforcement to the ring belt is provided. The insert reduces thermal and mechanical distortion of the ring belt, and thus increases the piston ring performance, reduces blow-by, and ultimately improves engine emissions. The insert is formed by an additive machining process, such as direct depositing, laser cladding, laser sintering, arc welding, additive welding, plasma transferred arc spraying, plasma welding, arc welding, selective laser sintering, and high velocity oxygen fuel spraying, plasma spraying. According to one embodiment, an intermediate piece is mechanically attached to the piston, and the insert is applied to the intermediate piece, to provide additional reinforcement.

The present invention provides an evaporation fuel processing device including: a passage formed inside so as to allow a fluid to flow through the passage; a tank port and a purge port formed on one end side of the passage; an atmospheric air port formed on the other end side of the passage; and adsorbent layers filled with adsorbent which can adsorb evaporation fuel components, the adsorbent layers being provided in the passage, wherein a region which is constituted of three or more adsorbent layers and separating parts for separating the adjacent adsorbent layers, and in which a total volume of the adsorbent layers is set smaller than a total volume of the separating parts, is provided on an atmospheric air port side of the passage.

A piston ring having an outer running face, two flanks and an inner circumferential face is provided, the running face of which has profiling with a groove. The groove is arranged between two running face sections in relation to the cross section of the piston ring. The two running face sections are spaced apart from each other and substantially convexly curved and each have an apex. The groove has a periodically varying depth and a periodically varying width, and the number of periods of the course of the depth and the number of periods of the course of the width are equal.

A structure for mounting a piston ring mounted around a piston head of a piston is provided. The structure includes a ring groove formed along the piston head with a guide recess circumferentially formed in the ring groove in a certain section. The piston ring is rotatably fitted into the ring groove. A guide protrusion is formed on the piston ring and is provided in the section of the guide recess such that the guide protrusion is rotated within the section. The structure is configured such that when a plurality of piston rings is mounted around the piston head, rotation sections of the end gaps of the piston rings are not aligned with each other.

A structure for mounting a piston ring mounted around a piston head of a piston is provided. The structure includes a ring groove formed along the piston head with a guide recess circumferentially formed in the ring groove in a certain section. The piston ring is rotatably fitted into the ring groove. A guide protrusion is formed on the piston ring and is provided in the section of the guide recess such that the guide protrusion is rotated within the section. The structure is configured such that when a plurality of piston rings is mounted around the piston head, rotation sections of the end gaps of the piston rings are not aligned with each other.

An evaporated fuel treatment apparatus includes a passage circulating fluid being formed therein, a tank port and a purge port being formed at one end side of the passage, and an atmosphere port being formed at another end side of the passage. At least four adsorbent layers in which adsorbent adsorbing fuel components is filled are provided in the passage. The evaporated fuel treatment apparatus has a main adsorbent layer and a region provided on an atmosphere port side of the main adsorbent layer. At least three adsorbent layers that are different from the main adsorbent layer, and separating portions that separate the adsorbent layers which are adjacent to each other are provided in the region. The volume of at least one separating portion in the region is made larger than a total of the volumes of adsorbent layers that sandwich the separating portion therebetween.

The invention discloses a control method for the concentration of fuel gas in a crankcase, a control device for the concentration of fuel gas in the crankcase, a vehicle and a computer storage medium, the control method for the concentration of fuel gas in the crankcase is applied to the vehicle, and the control method for the concentration of fuel gas in the crankcase comprises the steps that the current operation working condition of an engine and the concentration of hydrogen in the crankcase are obtained; adjusting the rotating speed of the centrifugal oil-gas separator according to the operation condition; when the hydrogen concentration increases, a first step is performed, where the first step includes reducing the torque of the engine. According to the method for controlling the concentration of the fuel gas in the crankcase, the volume concentration of the hydrogen in the crankcase can be kept at a low level.

In a two-stroke internal combustion engine using air for scavenging its combustion chamber (4), a scavenging passage (6) communicating with a crankcase (2) and a combustion chamber (4) is charged first with rich air-fuel mixture generated by a carburetor, next with lean air-fuel mixture, and next with air through an in-piston passage (36). The lean air-fuel mixture is generated in the in-piston passage 36 by diluting the air-fuel mixture with the air. In each scavenging stroke to scavenge the combustion chamber (4), the combustion chamber (4) is supplied first with the air (40) and next with the lean air-fuel mixture (42) from the scavenging passage (6). The use of the lean-air-fuel mixture (42) next to the air (40) contributes to reduce acceleration failure or engine stop caused by sudden acceleration.

The invention discloses a sparking plug ignition device in a combustion chamber of a small rotary engine and a method, and belongs to the field of small rotary engines. The device provided by the invention comprises a first working chamber, a second working chamber, an ordinary sparking plug, a sparking plug channel, an ignition chamber, sealing sheets and a third working chamber, and further comprises an engine cylinder, a modified sparking plug, a modified sparking plug anode, bushings, a cathode and a triangle rotor. The sparking plug ignition device provided by the invention has the following advantages by removing the ignition chamber and the sparking plug channel: (1) energy loss is reduced and the probability of blow-by of gas between two adjacent cylinders is lowered; and (2) the compression ratio can also be improved without changing the rest of the structure, and the smaller the size of an engine, the greater the increase in the compression ratio. By improving the ignition position from the interior of the ignition chamber to the interior of the combustion chamber, the following advantages are achieved: (1) the flame propagation distance is greatly reduced, and the possibility of knocking and flame quenching of the small rotary engine is reduced; and (2) the direct contact of spark with compressed fresh gas mixture reduces the difficulty in ignition.

The invention relates to a complete structure of a silent generating set, which includes a nacelle body. The accommodation space in the nacelle body is formed with three chambers: an air inlet chamber, an engine chamber and a heat exhaust chamber arranged in sequence, wherein the air inlet chamber It is separated from the engine chamber, the engine chamber and the heat exhaust chamber by a first partition and a second partition respectively, and an exhaust hole is arranged on the second partition; the engine room body has four sides, of which The three sides are provided with ventilating parts; one of the ventilating parts communicates with the air inlet chamber, the other ventilating part communicates with the engine chamber, and the other ventilating part communicates with the heat exhaust chamber. The beneficial effects of the invention are: the interior space layout of the generator set is more reasonable, the heat removal efficiency is high, and the damage caused by the high temperature of electronic parts, power spark plug gaskets and engine oil is avoided.

A piston including at least one insert disposed between an inner surface of a ring belt and undercrown surface, and / or between the inner surface of the ring belt and a pin boss, to provide reinforcement to the ring belt is provided. The insert reduces thermal and mechanical distortion of the ring belt, and thus increases the piston ring performance, reduces blow-by, and ultimately improves engine emissions. The insert is formed by an additive machining process, such as direct depositing, laser cladding, laser sintering, arc welding, additive welding, plasma transferred arc spraying, plasma welding, arc welding, selective laser sintering, and high velocity oxygen fuel spraying, plasma spraying. According to one embodiment, an intermediate piece is mechanically attached to the piston, and the insert is applied to the intermediate piece, to provide additional reinforcement.

This utility model discloses a piston assembly with a combined piston ring and unloading groove structure, suitable for hydrogen combustion engines, including a piston ring assembly and a piston; the piston has a first ring groove and a second ring groove arranged sequentially from top to bottom, and an unloading groove is provided at the circumferential land between the first ring groove and the second ring groove, the lower end face of the unloading groove is inclined outward, and the inclination angle β satisfies 0°<β<90°; the piston ring assembly includes a top ring, which is disposed in the first ring groove, and the top ring includes a ring body and a scraper, the lower end face of the ring body is provided with a first groove that runs through the circumference, the first groove extends from the outer edge of the ring body inward, the first groove is used to embed the scraper, and the scraper can extend and retract radially along the first groove; the ring body and the scraper are respectively provided with a first opening and a second opening that run through both the radial and axial directions, and the circumferential offset angle α between the first opening and the second opening satisfies 90°≤α≤180°.

The invention discloses a piston ring for an internal combustion engine. The piston ring comprises a piston ring body and is characterized in that the open end of the piston ring body is provided with an airflow sealing structure for sealing the gap of the open end, the airflow sealing structure comprises a protrusion integrated with one end part of the open end of the piston ring body, and the other end part of the open end of the piston ring body is provided with a clamping groove into which the protrusion is clamped. Through the design of the airflow sealing structure at the open end, the sealing performance of the piston ring is greatly improved, the blow-by amount is reduced, the diesel engine efficiency is improved, the engine oil consumption is reduced, and the engine life is prolonged.

The invention provides well cementation cement paste as well as a preparation method and application thereof. The well cementation cement paste comprises oil well cement, an active material, hollow glass microspheres, a corrosion-resistant material, a tough material, a suspending agent, a dispersing agent, a fluid loss agent, a retarder, a defoaming agent and water, the density of the well cementation cement slurry is 1.2 to 1.6 g / cm < 3 >. The preparation method comprises the following steps: (1) mixing oil well cement, an active material, hollow glass microspheres, a corrosion-resistant material, a tough material, a suspending agent, a dispersing agent and a fluid loss agent to obtain a dry mixture; (2) mixing a retarder, a defoaming agent and water to obtain wet mixed liquid medicine; and (3) mixing the dry mixed material and the wet mixed liquid medicine to obtain the well cementation cement slurry. The well cementation cement paste provided by the invention realizes high-quality rapid well building, ensures long-term sealing integrity of a cement sheath, and provides powerful technical support for large-scale exploration and development of high-sulfur-content natural gas wells and CCUS wells and reduction of wellhead gas blow-by and annulus pressure risks.

The invention discloses a steam turbine high-pressure steam guide pipe drainage system and method, and belongs to the technical field of thermal power generation devices. The system comprises a high-pressure cylinder applied to the field of steam turbines, four steam guide pipes are arranged on the high-pressure cylinder, each steam guide pipe is provided with a main steam adjusting valve and further communicated with a drain pipe, and the drain pipe is communicated with a drain flash tank through a valve assembly; warm pipe pipelines are arranged between the drain pipes, the drain pipes are communicated in series through the warm pipe pipelines, or the drain pipes are communicated in pairs through the warm pipe pipelines; according to the invention, the structural design breaks through the design of a traditional structure, especially the design of utilizing a heating pipeline, and the mutual communication effect is realized, so that the steam guide pipe behind the opened high-pressure main steam regulating valve heats the steam guide pipe behind the closed high-pressure main steam regulating valve, the risk that water or cold steam enters a high-pressure cylinder is eliminated, and the service life of the high-pressure cylinder is prolonged. And the safety of the unit is improved.