59results about How to "Reduce the flow cross-sectional area" patented technology

Disclosed is a renewable energy extraction device and methods for producing renewable energy from flowing air or water. The renewable energy extraction device captures a relatively large amount of flowing water or atmospheric air and increases speed of the captured water or air by decreasing flow cross sectional area in the flow direction. An energy extraction component is used to extract energy of the high-speed water or air and convert it to rotational mechanical energy on a power shaft. A rotation direction control mechanism is used to make the power shaft always rotate in one direction, without coming to a stop, for ocean applications. The mechanical energy of the power shaft is transmitted to an electric generator, pump, compressor, or any other rotary equipment. After extraction of its energy, the captured air or water is released to its original source at a downstream location.

The invention discloses a complex turbine device with a variable section, comprising a double flow channel turbine volute, wherein the double flow channel turbine volute is provided with two air flow passageways; the double flow channel turbine volute is provided with a volute air outlet and a volute air inlet which are communicated with the air flow passageways; a complex turbine impeller is arranged in the double flow channel turbine volute; and the complex turbine impeller is formed by compounding two turbine impellers which correspond to the two air flow passageways one by one. In the invention, the variable section function can be achieved by design and development of the turbine of a turbocharger and by using the complex turbine device, thereby effectively solving the defects of poor reliability and high cost of a vane type turbocharger with the variable section, effectively improving the efficiency of the turbine of an engine in low speed and increasing the torque output of the turbine.

The invention discloses an electric control actuator for variable-geometry turbocharging. The electric control actuator for variable-geometry turbocharging comprises a bottom casing, a plastic cover plate, a DC motor, a worm gear and worm unit, an output shaft, a non-contact high-precision position sensor and an integrated processing circuit PCB, wherein the DC motor is fixed in the bottom casing through a spring press piece, and a pinion is mounted at the shaft tail end of the DC motor and meshed and connected with the worm gear and worm unit; a rotor of the non-contact inductive sensor is prepared from a stamping part conducting material made of a closed wire in specific geometry and is fixed at the top end of the output shaft through a positioning hole, and a helical gear is mounted in the middle of the output shaft and meshed with the worm gear and worm unit for actuation output; and the integrated processing circuit PCB is inlaid in the plastic cover plate. Motor control is driven by angle signals acquired by an engine ECU to change the flow sectional area (nozzle opening) of a turbine nozzle, a supercharger and an engine are matched optimally, and the electric control actuator has the advantages of high real-timeness, high control precision, large torque and the like.

An exhaust gas recirculating device for a marine diesel engine comprises a dynamic wave washer. By means of the characteristics of efficient washing and high heat exchanging coefficients of the dynamic wave washer, particular matter and sulfur dioxide in exhaust gas are removed, the exhaust gas is cooled to a certain degree, and the washed exhaust gas is subjected to further cooling of an air cooler, dewatering of a drip separator and pressurizing of an air blower, enters a scavenging header and a combustor to take part in combustion. By means of the exhaust gas recirculating device for the marine diesel engine, efficient washing of the circular exhaust gas can be achieved; compared with existing EGR washing equipment, the structure is greatly simplified, and the initial investment and therunning cost of EGR are reduced; and great potential is provided for following upgrading and improving of the EGR device.

The invention discloses an undisturbed switching control method of a pneumatic regulation valve. The undisturbed switching control method of the pneumatic regulation valve relates to a device body anda first cavity formed in the device body. A first rotary shaft which extends upwards and downwards is rotatably arranged in the first cavity. The tail end of the top of the first rotary shaft is in power connection with a motor fixedly arranged in the top end wall of the first cavity. According to the undisturbed switching control method of the pneumatic regulation valve, the structure of a device is simple, the performance is reliable, and mounting, maintenance and repair are convenient; the device can automatically detect the rate of flow passing through the device and compares the flow rate with an initial setting, automatic dynamic regulation is conducted according to the flow rate, and thus, it is ensured that the rate of flow passing through the valve is constant; meanwhile, the device can be switched into a manual mode according to requirements, the flow data and the operating state of the device are not changed in the switching process, and thus, undisturbed switching betweenthe automatic mode and the manual mode is achieved; and in addition, the device can generate compressed gas through a micro gas pump, and an external gas source is not needed, so that the mounting procedure is greatly simplified, and the maintenance cost of the device is reduced.

A guide bar arrangement has a guide bar having a guide groove that extends about an outer circumference of the guide bar. A saw chain is driven in circulation in the guide groove about the guide bar. The guide groove is delimited by a groove base, a first sidewall and a second sidewall positioned opposite the first sidewall. The guide bar has an opening for supply of oil into the guide groove, wherein the opening extends from an exterior side of the guide bar, wherein the exterior side extends in a longitudinal direction of the guide bar, into the guide groove and opens in the first sidewall into the guide groove. An insert is secured in the opening and reduces a free flow cross-sectional area of the opening.

The invention relates to electronic equipment. The electronic equipment comprises a shell assembly and a heat dissipation assembly, wherein the shell assembly forms a first cavity, and the first cavity is used for accommodating at least part of electronic elements; at least part of the heat dissipation assembly is located in the first cavity, the heat dissipation assembly is provided with a second cavity, and the first cavity is not communicated with the second cavity; and the second cavity is provided with a gas inlet and a gas outlet, and external gas can enter the second cavity through the gas inlet and can be discharged through the gas outlet, so that external dust, liquid and other substances can be prevented from entering the first cavity to influence the electronic elements, the functional stability and reliability of the electronic elements are improved, and the service life of the electronic elements and the service life of the electronic equipment are prolonged. In addition, when the first cavity is not communicated with the second cavity, external gas only circulates in the second cavity of the heat dissipation assembly, so that the circulation sectional area of the gas is reduced, the flowing speed of the gas is increased, and the heat dissipation efficiency of the heat dissipation assembly is improved.

The invention discloses a cylinder body water jacket with an orifice plug. The cylinder body water jacket comprises an annular runner, a water inlet and a water outlet, wherein the annular runner is arranged around all steam cylinder holes; the water inlet and the water outlet are formed in a cylinder body and communicated with the annular runner; the orifice plug allowing cooling liquid to flow in single direction along the annular runner is disposed in the annular runner. By means of the cylinder body water jacket with the orifice plug, the flow of the cooling liquid passing through the side walls of all the cylinder holes in the cylinder body can be kept uniform, and the flow speed and pressure of the cooling liquid can be effectively increased so as to improve the cooling effect of an engine.

The invention provides a single double-needle valve double-nozzle high-pressure common rail oil injector for a medium-heavy diesel engine. The single double-needle valve double-nozzle high-pressure common rail oil injector comprises a magnetic core valve seat, a ball valve ejector rod base mounting screw cap, a ball valve ejector rod base, a valve needle control rod base, an oil nozzle mounting screw cap and an oil nozzle valve body; two electromagnetic valves are arranged in the magnetic core valve seat, two valve needle control rods are arranged in the valve needle control rod base, two valve needle cavities are formed in the oil nozzle valve body, two oil nozzles are arranged at the lower ends of the valve needle cavities, and two oil nozzle valve needles which are connected with the two valve needle control rods and are used for controlling the two oil nozzles are arranged in the valve needle cavities. In addition, a ball valve ejector rod and a high-pressure sealing ball valve arearranged in a split mode, and the ball valve ejector rod is designed into a large-diameter section and a small-diameter section, so that the needed electromagnetic force is further reduced. The function of the high-pressure common rail oil injector is more suitable for a diesel engine to inject diesel oil compared with a traditional oil injector, under the condition that the pressure of a fuel system is not increased, the atomization effect of high-pressure diesel injection can be further improved, and the emission level of an engine original machine can be improved; and meanwhile, the oil spraying rate rule is optimized, and the power level of the diesel engine is further explored.

The invention discloses a compact type organic working medium high-temperature and high-voltage electric heater. The compact type organic working medium high-temperature and high-voltage electric heater comprises a heating pipe which is arranged in an outer pipe at a heating section; flange connectors are symmetrically arranged at two ends of the outer pipe at the heating section; bases are correspondingly arranged at the left side and the right side of the outer pipe at the heating section; a binding post which is inserted into the outer pipe at the heating section and is connected with the heating pipe is arranged in the base; the upper end of the binding post is connected with an external power supply; a mica post, a cylindrical section, another micro post, a sealing ring and a hollow nut are sequentially arranged in the base from bottom to top; insulating sleeves are arranged at the outer side of the cylindrical section and the inner side of the hollow nut. The compact type organic working medium high-temperature and high-voltage electric heater has the advantages of being practical, efficient, simple to operate, cost saving, safe, reliable, and resistant to high temperature and high voltage.

An internally cooled airfoil for a rotary machine, for example, a gas turbine engine includes a suction and pressure side wall each extending in an axial direction, i.e. from a leading to a trailing edge of the airfoil. A suction wall sided cooling channel and a pressure wall sided cooling channel extend in the axial direction. A feed chamber is defined between a first and second inner wall for feeding the suction wall and pressure wall sided cooling channel each by at least one through hole inside of the first and second inner wall. The suction wall sided cooling channel and the pressure wall sided cooling channel extend into the trailing edge region separately. The suction wall sided cooling channel and the pressure wall sided cooling channel join before discharging at the trailing edge.

A heat supervisor of cooling , heating and electricity linkage system for gas combustion engine features arranging smoke heat transfer tube and water heat transfer tube of engine cylinder packing in working media liquid below supervisor ; using heat transfer tubes of heat use section and radiation section , gas flow leading plate , gas flow tilt leading plates and casing to form condensing channel for leading steam of working media downwards and channel for leading said steam upwards ; using baffle , casing and gas flow leading plate to enclose a gas storage chamber with condensing tube in it and elongating their liquid seals into working media liquid .