8results about How to "Reduce intake resistance" patented technology

This invention relates to a commercial vehicle intake system and a commercial vehicle, belonging to the field of vehicle power systems. The technical solution is as follows: A commercial vehicle intake system includes an intake duct, an oil filter, and an air filter connected sequentially along the airflow direction. A water-screening assembly is installed within the air inlet of the intake duct, comprising a water-screening plate and a water collection hopper, the bottom of which connects to the outside of the intake duct. A tower-type water-filtering assembly is installed within the air outlet of the intake duct, comprising multiple stacked blades, with a first water collection trough below the blades. A swirl assembly is installed at the air inlet of the oil filter, comprising a swirl fan, with a second water collection trough below the fan. This solution, through a three-stage water removal assembly, gradually separates moisture from the air while simultaneously improving the removal capacity of dust and other impurities, significantly reducing the moisture and dust content of the air entering the oil filter and air filter, thus ensuring the service life of the oil filter and air filter and the combustion performance of the engine.

The utility model provides an exhaust fume collecting hood and a range hood comprising the same, the exhaust fume collecting hood is provided with an annular suction plate, an air inlet and an air duct communicated with the air inlet, the exhaust fume collecting hood further comprises a flow guide part, the flow guide part extends from the edge of the annular suction plate to the inside of the air duct, and the flow guide part is provided with a flow guide hole; the flow guide part and the inner wall of the air duct form a flow guide channel, and the surface, facing the air duct, of the flow guide part is provided with a flow guide protrusion or a flow guide recess. By arranging the flow guide part, the flow guide channel is formed between the flow guide part and the air duct, and on the basis of guiding oil smoke on the edge of the annular suction plate, reducing a vortex area on the edge of the annular suction plate, reducing the air inlet resistance on the edge of the annular suction plate and improving the air inlet efficiency, the smoke catching capacity of the smoke collecting hood is correspondingly improved. In addition, the surface of the flow guide part is provided with the flow guide protrusions or the flow guide recesses with non-smooth planes, compared with a smooth plane, airflow can enter the exhaust fume collecting hood more smoothly and more efficiently, and therefore the overall smoke suction effect and the operation efficiency are improved.

This invention provides a jet-type gas turbine guide device, including a guide, a heat dissipation assembly, and a flow divider. The guide consists of an outer ring, inside which is an inner ring. The invention features a hollow cavity inside the blade, with heat dissipation holes arranged along the inner side of the blade, communicating with the hollow cavity. Through holes are formed around the surface of the outer ring, and fuel injectors are installed on the surface of these through holes. During operation, the fuel injectors inject fuel into the hollow cavity inside the blade through the through holes. The fuel entering the hollow cavity carries away the heat generated by the blade, thus cooling it and preventing thermal stress at the leading edge that could cause cracks. The fuel flows out through the heat dissipation holes and into the combustion chamber. This guide has a cooling and heat dissipation structure, thereby improving its service life.

The utility model discloses a replaceable air filter core air inlet pressure stabilization chamber, internal combustion engine and unmanned plane, include: the pressure stabilization chamber body, its inside constitution is used for stabilizing the main cavity of airflow, throttle flange, set up in the upstream end of pressure stabilization chamber body, be used for connecting throttle body, air inlet flange, set up in the downstream end of pressure stabilization chamber body, be used for connecting engine, air filter core box, it is connected with the installation mouth of being set up on the pressure stabilization chamber body wall surface in detachable mode to embed in main cavity, air filter core, its accommodation is in the inside of air filter core box, wherein, the airflow of flowing through throttle flange is after entering main cavity, passes through air filter core and filters, finally is transported to engine through air inlet flange.

To address the limitations of existing pulse detonation combustors using detonation jet ignition, which require long jet tubes and thus restrict the increase of their operating frequency, and the dependence of stable operation of pulse detonation turbine engines on the performance and reliability of the igniter, this invention proposes a pulse detonation combustor based on rotating detonation wave ignition. This invention utilizes the relatively high frequency of rotating detonation combustion and the requirement for only a single ignition. The rotating detonation wave generated by the rotating detonation chamber serves as a continuous high-energy ignition source, igniting the explosive mixture within the detonation jet channel. This creates a high-energy detonation jet at the channel's exit, which then flows into the pulse detonation tube and ignites the explosive mixture within. This invention, while maintaining the excellent initiation performance of the detonation jet ignition method, overcomes the adverse effects of long jet tubes and high-frequency ignition on the efficient and stable operation of pulse detonation turbine engines.

This utility model relates to the field of wall-hung boiler technology, and in particular to a premixed combustion fan for wall-hung boilers. A premixed combustion fan for wall-hung boilers includes a volute and a motor mounted on one side wall of the volute. An impeller is disposed inside the volute. The motor includes a mounting base and a motor body. The mounting base is connected to the side wall of the volute. The motor body includes a shaft, a rotor core, and a stator assembly. The rotor core is fixed to the shaft. The stator assembly includes a square stator core and a support frame for fixing the stator core. The support frame is connected to the mounting base. A cooling fan is mounted at one end of the shaft, and the impeller is press-fitted to the other end of the shaft. This utility model effectively solves problems related to vibration and noise, motor heat dissipation, impeller connection reliability, gas mixing efficiency, and ease of assembly.

This utility model belongs to the field of gas turbine technology, and specifically relates to an air intake device for an aero-derivative gas turbine compressor. The air intake device includes an intake casing, characterized in that: a shroud is fixed inside the intake casing, an inlet rectifier cone is fixed outside the intake casing, a cleaning pipeline is installed on the inlet rectifier cone, and a hydraulic motor drive and lubrication assembly is installed in the inner ring of the intake casing. The hydraulic motor drive and lubrication assembly is enclosed within the shroud, and its pipeline is connected to the hydraulic motor drive and lubrication assembly pipeline. The beneficial effects of this utility model are: it achieves gas turbine intake rectification, avoids leakage of parts affecting intake efficiency, and reduces intake resistance. By accelerating and uniformly introducing external air into the compressor first stage through a tapered channel, it reduces airflow separation, ensures that air enters the compressor flow path smoothly along the axial direction, and avoids compressor efficiency reduction or surge due to uneven flow velocity.

The invention discloses a variable tumble air inlet system of an engine, which relates to the technical field of automobile engines and comprises an air inlet channel, a flow guide body and a control system. The air inlet channel is used for conveying airflow to the combustion chamber. The flow guide body is located in the air inlet channel and comprises an upstream part, a downstream part and a connection part. The downstream end of the upstream part is fixedly connected with a first rotating shaft, and the upstream end of the downstream part is fixedly connected with a second rotating shaft. The first rotating shaft and the second rotating shaft are rotationally installed on the side wall of the air inlet channel. The connecting part is located between the upstream part and the downstream part, so that the flow guide body can be in an arch shape, and the protruding direction of the arch faces the axis of the air inlet channel. The control system comprises a rotating speed sensor, an actuator and a controller. The rotating speed sensor is used for monitoring the real-time rotating speed of the engine and transmitting the rotating speed to the controller. The actuator is used for driving the first rotating shaft and the second rotating shaft to rotate. And the controller is used for controlling the action of the actuator. The requirements for torque power at different rotating speeds can be met by adjusting the actual flow passing area and changing the tumble ratio in the combustion chamber.