125results about How to "Improve supercharging efficiency" patented technology

In an exhaust gas recirculation system for an internal combustion engine, which includes a turbocharger; a high-pressure EGR unit; a low-pressure EGR unit; a high-pressure EGR valve; and a low-pressure EGR valve, first, the opening amount of the high-pressure EGR valve is controlled in a feedback manner, and, then, the opening amount of a low-pressure EGR valve is controlled in a feedback manner in a transitional operation period in which the operation mode of the internal combustion engine is changing. In this way, the intake air amount is promptly adjusted to the target intake air amount without causing hunting.

A compressor includes an impeller including blades extending along a shroud. Each of the blades includes a leading edge, a trailing edge, and a tip edge connecting the leading edge and the trailing edge and opposing the shroud. The tip edge has a central curve extending along a center of a thickness of the tip edge from the leading edge to the trailing edge. The central curve has a tangential line touching a contact in the central curve. The tangential line has a tip edge inclination angle made by the rotation axis and the tangential line viewed in a reference direction which passes the contact and which is perpendicular to the rotation axis. The tip edge inclination angle increases as the contact approaches a first maximum inclination point in the central curve. The first maximum inclination point is separated from both the leading edge and the trailing edge.

A complete set of pressurizing and desulfurizing equipment for the top of pressure reducing tower to remove the H2S from its tail gas containing S is composed of pressurizing jet unit, solution tank, circulating pump unit, rich liquid pump unit, and cooler unit. Its desulfurizing technology features that the solution of methyl diethanolamine [(CH3)N(CH2CH2OH)2] is used as desulfurizing agent. Its advantages are high desulfurizing efficiency, simple structure and low cost.

A multi-stage supercharging device configured in such a manner that the sealing properties of the portion at which a high-pressure stage turbocharger and a low-pressure stage turbocharger are connected is improved. A multi-stage supercharging device (1) has a first supercharger (20) and a second supercharger (30). The first supercharger (20) is provided with a first turbine housing section (25b), a first exhaust gas inlet section (25a), and a first exhaust gas outlet section (25c) which is extended in the direction of the axis of the first turbine (21) from the first turbine housing section (25b) and is bent upward. The second supercharger (30) is provided with a second turbine (31), a second turbine housing section (35b), and a second exhaust gas inlet section (35a) which is directly connected to the first exhaust gas outlet section (25c) and which connects the first exhaust gas outlet section (25c) and the second turbine housing section (35b). The opening of the second exhaust gas inlet section (35a) is mounted on the opening of the first exhaust gas outlet section (25c) to cause the second supercharger (30) to be supported by the first supercharger (20).

The invention aims to provide a pressurization no-leakage piezoelectric control type gas injection device; and the device comprises a gas pressurization part, a piezoelectric control part, a gas nozzle part, a piezoelectric element, an injection device shell, a needle valve limiting rod, a needle valve return spring, a pressurization oil inlet way, a pressurization oil drainage way, an air inlet, an air intake channel, a control oil inlet way, a control oil return way, a center oil way, a sealing oil inlet way and the like. The pressurization oil inlet way enters the gas pressurization part; the control oil inlet way enters the gas nozzle part through the piezoelectric control part and the needle valve limiting rod; the sealing oil inlet way enters the gas nozzle part through the injection device shell; and the air intake channel enters the gas nozzle part through the gas pressurization part, the piezoelectric control part and the injection device shell. The pressurization no-leakage piezoelectric control type gas injection device is high in gas injection stability and consistency, can satisfy the system injection rule variability requirement, and can preferably solve the problem of gas leakage through a needle valve matching part.

The invention provides a gas pressure device with the function of saving driving gas. The pressure device is provided with two driving chambers, two driving pistons and two reversing valves, wherein, the driving gas is never led into a primary driving rod chamber, and the depressurized driving gas is led into a secondary driving air suction chamber, thereby achieving the effect of saving the driving gas; and the use of the two driving pistons enlarges the total area of the driving pistons. The gas pressure device with the function of saving driving gas has the advantage that the pressurization efficiency can be increased while the pressure ratio and the total length of the device body are not changed.

A supercharging system integrated steel pipe hydrostatic testing machine water-filling apparatus comprises a low pressure cylinder body, a piston rod, a high pressure cylinder body and a water-filling head, etc. By controlling motion of the piston rod, internal pressure of a pipe is raised, pipe hydrostatic testing is realized, and the water delivery link is saved. During the pressure testing process, the water-filling head is prevented from being drawn back due to the effect of an anti-back block, and axial force is transmitted to a rack to make force on the whole structure to be more reasonable. Strength requirement of the whole body is reduced. A supercharging system and the water-filling apparatus are integrated. Thus, leak points are greatly reduced, supercharging efficiency is raised, the structure is simpler, operation is stable and reliable, safety is high, cost is low, and control is convenient.

The invention relates to an integrated hydrogen supply system of a fuel cell; the system comprises an integrated shell, the integrated shell comprises a gas-water separator shell on the lower portion, an ejector shell on the upper portion and a buffer cavity shell, and a hydrogen circulating pump is installed on the ejector shell; a hydrogen return inlet is formed in one side of the gas-water separator shell, a water outlet is formed in the bottom of the gas-water separator shell, a hydrogen return outlet is formed in the top of the gas-water separator shell, and a labyrinth structure is installed in the gas-water separator shell and used for separating water in hydrogen-containing mixed gas; the gas-water separator shell, the ejector shell and the buffer cavity shell are integrated into a whole, and the hydrogen circulating pump is integrated on the ejector shell, so that the volume is small, the hydrogen circulating pump can be mounted and used in some areas with small spaces, connecting pipelines between hydrogen supply components of a hydrogen path are omitted, the gas transmission distance is short, and the energy loss in the transmission process is reduced. And the pressurizing efficiency is improved, the mounting efficiency is high, and the freezing blockage condition caused by accumulated water in the pipeline when the temperature is too low is avoided.

The invention relates to a tower crane type concrete delivery device which comprises a tower truss, a tower cap, a lifting arm, a balance arm, a delivery pump, a delivery pipe and an arm frame, wherein the tower cap is arranged on the upper end of the tower truss; the lifting arm and the balance arm are horizontally connected with the upper end of the tower truss through rotating discs; the arm frame is arranged on the balance arm in a folded way, the input end of the arm frame is connected with the output end of the delivery pump through the delivery pipe fixed on the tower truss, and the delivery pump is arranged outside a base of the tower truss; the delivery pipe is provided with an accelerating pump used for accelerating the flow of a concrete material. According to the tower crane type concrete delivery device, the arranged tower truss serves as a support and guide structure of the delivery pipe, so that the height of a delivered material can be increased, and the synchronous adjustment of the height is carried out along the lifting of the tower truss; in addition, the arm frame is arranged on the balance arm, under a general condition, extra weight counterbalance is unnecessary, additionally, the height is changed with the height of the tower truss, and the output end of the arm frame is positioned above a pouring part all the time, so that the stability of the pitch number of the arm frame can be kept, the height is increased, the cost is less increased, and high working efficiency and low cost are achieved.

The invention relates to a WVR (wave vapor recompression) continuous vaporization system and belongs to the technical field of thermal evaporation. The core is that a phase-change wave supercharger is introduced, WVR is finished by using shock wave heating and the supercharge characteristic, two systems, namely, a WVR system and a wave supercharge / mechanical compression system, are combined for use, last-effect secondary vapor enters the phase-change wave supercharger for recompression and enters a primary-effect evaporator as a driving heat source after the energy grade is increased, and the produced secondary vapor is continuously evaporated as a secondary-effect heat source after separated by a gas-liquid separation module; an original liquid is sent out of devices by pumps after concentrated by each evaporator to be saturated. The system is simple, solves the problem that vapor compressors are difficult to design and manufacture and has the advantage that the supercharge efficiency is higher than that of a steam ejector.

The invention relates to a heat exchanger which used the cross-helical tube, involving an exhaust recycle heat exchanger. For improving the engine exhaust recycle heat exchanger and increasing the heat exchange efficiency. The exchanger includes the heat exchange tube, shell and the tube board. Of which the heat exchange tube is the stainless steel tube which has the entad raised cross-helical groove on the surface, and the section shape of the tube is the flat shape. The height and width of the section shape in the flat shape heat exchange tube are unlikeness, and the opposite rotating direction helix line cross on the relative long edge of the tube as the 'X' shape. Because of the application of the cross-helical heat exchange tube, the tube inside and outside is not easy to dirty and increased the heat exchange efficiency, the heat exchanger is particularly suitable for the exhaust gas recycle coolers of a vehicle engine, reduce the exhaust discharge temperature and enhance the vehicle engine discharge performance indicators to meet environmental discharge requirement. At the same time, the invention can also be used in a turbocharger system to improve the engine performance.

There is provided a control device of an engine that includes a turbo-supercharger and a variable valve mechanism, the control device including: a valve timing change means; an ignition timing change means; a fuel injection amount change means; an acceleration request detection means; a supercharging pressure detection means; and an acceleration control means that corrects, when the acceleration request is detected, retarding of ignition timing in a low supercharging region where the supercharging pressure is lower than a predetermined value, that completes the correction of the retarding of the ignition timing in a high supercharging region where the supercharging pressure is equal to or higher than the predetermined value to provide a valve overlap and that changes the fuel injection amount such that an air-fuel ratio at which a mixture air of a scavenging gas and an exhaust gas is easily burned within an exhaust passage is provided.

The invention discloses a gas compressor with damping boss guide vanes. The gas compressor is composed of a machine body assembly, a supercharging device and a servo motor. The supercharging device isinstalled between a gas inlet and a main gas chamber of the main body assembly, gas supercharging is achieved, the supercharging process is stable, energy consumption is low, and high supercharging is achieved according to practical requirements. The servo motor is installed on the outer wall side of a shell. The guide vanes adopted in the gas compressor are simple in structure, damping bosses inthe middles of the guide vanes and the vanes are assembled to be in an annular shape to restrict each other, rigidity is increased, the inherent frequency of the vanes is changed, the bending torsional stress of the roots of the vanes is reduced, damping boss combined faces of the guide vanes are sprayed with wear resisting alloy, and the damping effect can be achieved during vibration of the guide vanes. Impellers adopted in the gas compressor are large in gas suction amount, low in noise, high in working efficiency, no prone to deformation and damage and long in service life, flow equalizing processing for gas suction and gas exhaust can be achieved, and balance of gas pressure in the shell is ensured.

A turbocharger engine includes an engine body and a turbocharger. The turbocharger includes a large turbo unit having a large turbine chamber, a large compressor chamber, and a large turbine shaft extending between the two chambers; and a small turbo unit having a small turbine chamber, a small compressor chamber, and a small turbine shaft extending between the two chambers. The large compressor chamber is disposed upstream of the small compressor chamber in an intake passage. A large turbo axis and a small turbo axis are disposed to extend generally in the same direction as an engine output axis. The large turbo unit is disposed such that the large turbo axis is non parallel to the engine output axis, and a large-compressor-chamber-side portion of the large turbo axis is closer to the engine output axis than a large-turbine-chamber-side portion thereof in a plan view in an axis direction of the cylinder.

A fuel cell hydrogen path series integrated system comprises an integrated seat body, a hydrogen circulating pump is installed at one side of the integrated seat body, a hydrogen pump gas inlet channel and a hydrogen pump gas exhaust channel are arranged in the integrated seat body, one side of the hydrogen pump gas inlet channel is communicated with a booster cavity of the hydrogen circulating pump, the other side of the hydrogen pump gas inlet channel is communicated with a hydrogen circulation path inlet channel arranged in the integrated seat body, and a water segregator and a drain valve are arranged in the hydrogen circulation path inlet channel; and one side of the hydrogen pump gas exhaust channel is communicated with the booster cavity of the hydrogen circulating pump, the other side of the hydrogen pump gas exhaust channel is communicated with a low-pressure area of an ejector mounted on the integrated seat body, a high-pressure nozzle is arranged in the low-pressure area, a hydrogen source inlet connecting pipe is arranged at the front side of the high-pressure nozzle, an electromagnetic valve is arranged in the hydrogen source inlet connecting pipe, and an ejector guide pipe is arranged at the rear side of the high-pressure nozzle. The fuel cell hydrogen path series integrated system is high in installation efficiency, small in size, small in occupied space, short in transmission distance, good in stability, high in rigidity, small in vibration, low in noise and capable of eliminating transmission loss and improving the supercharging efficiency, and the overall performance is improved.

The invention discloses a piston engine system which is applied to an aircraft during high-altitude long flight. The piston engine system comprises a piston engine (106), triple turbochargers (101, 102 and 103), corresponding fuel gas three-way valves (104 and 105), corresponding air three-way valves (107 and 109), inter-stage coolers (108 and 110), inter-stage after-burning devices (111 and 112) as well as matched air, fuel gas and fuel oil pipelines. According to the piston engine system disclosed by the invention, air and fuel gas three-way valves are controlled, so that the stage number of a turbocharging device accessed into the system is controlled, and the piston engine system is guaranteed to normally work under different gas inlet states from ground to a 20000m high altitude. Meanwhile, the intercoolers are additionally arranged turbocharging stages and after-burning devices are additionally arranged among turbine stages, so that consumed work of downstream supercharging is reduced, output work of a downstream turbine is increased, normal work of a multi-stage turbocharging system is guaranteed, and a fuel consumption rate is reduced by improving efficiency.

The invention relates to a multi-start system with pneumatic pressurizing units for a liquid-propellant rocket engine, and belongs to the field of design of start systems for pump pressure type liquid-propellant rocket engines. The multi-start system comprises the two pneumatic pressurizing units, a pressurizing gas source, a gas generator, two turbopumps, two control valves and two upward check valves. The two pneumatic pressurizing units communicate with the pressurizing gas source respectively. Each pneumatic pressurizing unit communicates with one end of one control valve and one end of one upward check valve respectively. The other ends of the two control valves both communicate with the gas generator. The other end of each upward check valve communicates with one turbopump. The two turbopumps both communicate with an exhaust pipeline of the gas generator. An oxidizing agent is supplied into one pneumatic pressurizing unit and the corresponding turbopump, and fuel is supplied intothe other pneumatic pressurizing unit and the corresponding turbopump respectively. The multi-start system with the pneumatic pressurizing units has the advantages of being simple in system, light instructural mass, high in work efficiency, high in consistency of working conditions of all starts, and low in gas consumption.

The invention relates to the technical field of liquid rockets, in particular to a pressurizing device of a liquid oxygen methane rocket and the liquid oxygen methane rocket. The pressurizing device of the liquid oxygen methane rocket comprises a liquid oxygen storage tank and a liquid methane storage tank, wherein the liquid oxygen storage tank is provided with a pressurized gas inlet; and the liquid methane storage tank is internally provided with a pressurized gas cylinder, and the pressurized gas cylinder communicates to the pressurized gas inlet through a pipeline. The invention providesthe pressurizing device of the liquid oxygen methane rocket and the liquid oxygen methane rocket with lower cost on a basis of guaranteeing the safety.

The invention belongs to the technical field of pumps, in particular to an environmental-friendly type high-pressure three-plunger oil-free water pump. An eccentric seat is sleeved on a motor shaft, abearing is sleeved on a convex shaft which is eccentrically arranged on the eccentric seat, an external hexangular block is sleeved on the bearing, three cushion blocks are evenly distributed on theexternal surface of the external hexangular block at intervals, a plunger and a return spring are sequentially arranged in three plunger holes which are radially distributed between the cushion blocksand a pump head, the internal end of the plunger is connected with the external hexangular block, the external end of the return spring tightly supports against the internal wall of the pump head, the external surface of the plunger in a pump body is sleeved with a self-lubrication bush, the external end part of the plunger is sleeved with a water sealing bush, a water inlet and outlet pipeline corresponding to each plunger is respectively provided with a water inlet and outlet valve, the water inlet and outlet valve is communicated with a water inlet and outlet joint, and a pressure regulating valve is arranged on a water outlet pipeline of the pump body. The invention has simple structure, convenient installation and maintenance, high pressurization efficiency and oil-free design, avoids the damage of the pump body and environmental pollution caused by oil leakage, has environmental-friendly performance and is suitable for popularization and application in the field of plunger pumps.

The design thought of an existing jet-propelled vertical lifting aircraft is changed, and the appearance of the jet-propelled vertical lifting aircraft adopts a streamline-shaped aircraft body with anintegrated wing body like a magic fish; two turboshaft aero-engines are used as core machines to save fuel oil, and two contra-rotating fans are used to increase the efficiency of air suction and airflow pressurization. A pressure cavity of the engine is made into a bearing chassis of the aircraft to reduce the weight of the aircraft and fully utilize the internal space of the aircraft; the engine sprays high-flow high-pressure airflow into the pressure cavity, the pressure cavity becomes a buffer for the airflow sprayed by each vector nozzle assembly, and becomes a silencer for reducing noise of the fans and the engines. Therefore, the air flow and the air injection direction sprayed by each vector nozzle connected to the periphery of the aircraft can be opened, closed and continuouslyadjusted, and the controllability of the aircraft is improved. Therefore, the novel jet-propelled vertical lifting aircraft and the novel aviation power system which are easy to control, can fly in acity and can be driven by ordinary people like automobiles are produced.

The invention discloses a pressure cylinder with a floating piston rod. The pressure cylinder with the floating piston rod comprises a rear end cover, a cylinder barrel, a front end cover, the floating piston rod, a piston rod fixing flange, a piston and an oil cup, wherein the front end cover and the rear end cover respectively cover the two sides of the cylinder barrel, the cylinder barrel is of a hollow structure, a cavity is formed between the front end cover and the rear end cover, the cavity is a pressurizing cavity, the piston is arranged in the cylinder barrel, one end of the floating piston rod is installed on the piston through the piston rod fixing flange in a floating mode, a gland flange covers one end of the pressurizing cavity of the front end cover, the other end of the pressurizing cavity in the front end cover is sleeved at the other end of the floating piston rod, and is matched with the floating piston rod in a sealing mode, a through hole which is communicated with the pressurizing cavity is formed in the side wall of the front end cover, the oil outlet end of the oil cup is connected with the through hole, and an oil pressing opening which is communicated with the pressurizing cavity is formed in the gland flange. The pressure cylinder with the floating piston rod is simple in structure and easy to machine, improves efficiency, and solves the problems that leakage happens and machining is difficult due to decentration of piston rods of pressure cylinders.

The invention relates to an energy-saving high-pressure homogenizing device for producing powdered oil. At present, a booster pump is mainly used by an existing high-pressure homogenizer for pressurization, pressurizing efficiency is low in this manner. Each time oil emulsion is added, pressure in the homogenizer is released, pressurization is needed again, and accordingly, consumption of resources is caused. The energy-saving high-pressure homogenizing device for producing the powdered oil is characterized in that a first motor is mounted at the top of an emulsification tank and coaxially connected with a U-shaped stirring paddle, a first discharging pipe is connected with the bottom of the emulsification tank, a first one-way valve is arranged on the first discharging pipe, and the firstdischarging pipe penetrates through a press body and is connected with a pressure cylinder. According to the device, a motor-driven mode is adopted, and two one-way valves are used, so that the high-pressure homogenization can be conducted continuously, and the pressurization efficiency is high; meanwhile, with adoption of a unique Y-shaped interactive homogenization cavity structure, the servicelife of a cavity is greatly prolonged, and the problem of metal particle residues is solved.

The invention provides a pressurizing electromagnetic and pressurizing piezoelectric combined type gas jetting device. An electromagnetic control part and a piezoelectric control part are arranged in a control device shell. A double-gas nozzle part is arranged in a jetting device shell. The lower end of a pressurizing device shell is connected with the upper end of the control device shell. The lower end of the control device shell is connected with the upper end of the jetting device shell, a control valve base is arranged between the double-gas nozzle part and the electromagnetic control part, and a control valve base is arranged between the double-gas nozzle part and the piezoelectric control part. The center of the pressurizing device shell, the center of the control device shell and the center of the jetting device shell are each provided with an air inlet channel, wherein the air inlet channels communicate with one another. The gas pressurizing efficiency is high, the gas jetting flexibility is high, the requirement for the large-range-power gas jetting amount and the requirement for jetting rule changeability of a system can be met, meanwhile, fuel is used for sealing gas, the problem that the gas leaks through valve needle couple parts can be well solved, and the dynamic property and the fuel economical efficiency of an engine can be effectively improved.

The invention aims at providing a combined non-pressurized fuel oil and pressurized fuel gas dual piezoelectric mixed fuel injection device.The mixed fuel injection device comprises a fuel gas pressurizing part, a dual piezoelectric control part, a nozzle part and the like.A pressurizing electromagnetic valve is utilized for controlling motion of a pressurizing piston to achieve fuel gas pressurization, two piezoelectric elements are utilized for controlling a fuel gas nozzle to inject fuel gas and controlling a fuel oil nozzle to inject fuel oil respectively, and three working modes of pure fuel oil injection, fuel oil and non-pressurized fuel gas dual-fuel injection and fuel oil and pressurized-gas dual-fuel injection can be achieved.The fuel gas pressurizing part controls fuel gas pressurization, the fuel gas pressurization timing is controllable, switching of fuel gas pressurizing injection and fuel gas non-pressurizing injection can be achieved rapidly, and the different requirements of different powers of a dual-fuel engine on fuel gas injection pressure are met.