14 results about "Small engine" patented technology

A start mechanism for a propulsion system including a receptacle; at least one portable source of energy disposed within the receptacle; a flow channel fluidly coupled to the receptacle; and a combustion section within the case, the combustion section fluidly coupled to the flow channel; wherein the at least one portable source of energy is configured to produce at least one of electrical energy and a source of chemical energy.

In order to solve the problems that the existing transmission shaft torque detection bench cannot meet the small engine crankshaft monitoring and cannot carry out long-term real-time monitoring, the present application provides a small engine crankshaft torque real-time monitoring device and method.The small engine crankshaft torque real-time monitoring device comprises a strain gauge, a controller, a micro generator and a data receiving unit; the strain gauge is attached to the surface of the crankshaft on either side of the engine pulley; the controller is fixed on the side of the engine pulley and comprises a signal processing module, a transmitting module, a power module, a storage battery and a wifi module; and the micro generator is integrally installed on the inner side of the crankshaft end bearing.The present application has the beneficial technical effect that the torque of the small engine crankshaft under different load conditions can be monitored in real time, and the torque of the small engine crankshaft in actual operation can be monitored in real time for a long time.

The present invention relates to a small engine-driven electric charging device. The technical problem to be solved is to provide a small engine-driven electric charging device capable of charging the battery not only while the electric vehicle is driving but also while the electric vehicle is parked or stopped, by installing a separate small engine in the electric vehicle so that the small engine drives a main motor and the main motor drives a plurality of generators. To this end, the present invention comprises: a small engine having an displacement of 20cc to 200cc; a main motor including a motor rotating shaft coupled to the small engine and a motor spur gear coupled to the motor rotating shaft; and a motor rotational force transmission unit including a first driven spur gear meshed to the motor spur gear of the main motor, a driven shaft coupled through the first driven spur gear, and a plurality of second driven spur gears coupled to the driven shaft. A small engine-driven electric charging device is provided, comprising: a plurality of generator modules each coupled to a plurality of second driven spur gears provided in the motor rotational force transmission unit; wherein each of the plurality of generator modules includes a first generator including a first generator tooth gear connected to the second driven spur gear via a first chain and a first generator rotation shaft coupled to the first generator tooth gear, and a second generator including a second generator tooth gear connected to the first generator tooth gear via a second chain and a second generator rotation shaft coupled to the second generator tooth gear; and an electric vehicle battery pack electrically connected to and charged to the plurality of generator modules.

The application discloses an engine thrust measuring device and method suitable for a small test bed and belongs to the technical field of engine thrust measurement. The device comprises a clamping test mechanism, a plurality of groups of symmetrically distributed T-shaped connecting rods are arranged on the clamping test mechanism, the T-shaped connecting rods are provided with T-shaped clamping pieces, the T-shaped clamping pieces and I-shaped clamping pieces installed thereon are used for clamping engine assemblies in cooperation, the engine assemblies comprise first engine assemblies and second engine assemblies, the engine flanges of the second engine assemblies are clamped between the T-shaped clamping pieces and the I-shaped clamping pieces, and pressure sensors are arranged between the engine flanges and the I-shaped clamping pieces; and a leveling mechanism is connected to the tail end of the clamping test mechanism. The device can make the engine thrust, the initial friction and the tension of the leveling mechanism be on the same horizontal axis, realize self-balancing of a thrust measurement force system, eliminate measurement deviation caused by torque and non-axial friction, improve measurement accuracy and solve the problem of low accuracy of small engine thrust measurement.

An air intake assembly for a small engine includes a plenum housing defining an internal volume; a first intake runner coupled to the plenum housing and extending between a first cylinder end and a first plenum end, and a second intake runner coupled to the plenum housing and extending between a second cylinder end and a second plenum end. A portion of the first intake runner extends into the plenum housing by a first extension distance so that the first plenum end is arranged within the internal volume. A portion of the second intake runner extends into the plenum housing by a second extension distance so that the second plenum end is arranged within the internal volume.

The utility model belongs to the field of vehicle auxiliary drive device, specifically is a right gear combination support of engine, including connecting assembly, fixed component, adjusting assembly, fender handle assembly, transmission rod subassembly and small -size engine, connecting assembly contains fixed frame axle, first / second connecting plate and clamping groove, fender handle assembly passes through protruding piece and clamping groove and inserts joint transmission operating force, the sleeve of fixed component is connected fixed frame axle, adjusting assembly realizes the stepless fine adjustment of installation angle and height through bolt and thread sleeve cooperation, transmission rod subassembly adopts double fish eye joint bearing connecting pin and engine gear shifting and shifts the piece. The utility model improves the installation versatility, eliminates the transmission slip of operating force, absorbs the deviation and vibration to prolong the life, and adjusts simple and easy precision, is applicable to motorcycle, agricultural machinery and so on small -size engine gear shifting system.

The present application relates to a kind of mobile rotary table type small engine tail jet's infrared test system, including the engine or nozzle being arranged on the rotating platform of rotary table system, rotary table system is used to drive the engine or nozzle to be measured to carry out 0~360 ° rotation in horizontal plane;It also includes thermal imager and control system;When the device to be measured is nozzle, then also include adjustable outer channel cooling air blower and outer channel gas collecting pipeline for providing.This application also provides the test method that the system can be realized.This application solves the key problems that traditional large fixed test bed is high in cost, not flexible, and existing ground test means cannot consider multi-angle automatic measurement, high-precision data acquisition and convenient deployment, realizes the highly efficient infrared radiation characteristic test system and method that height integration mobility, full-angle automatic measurement, extensive test function, high-precision data guarantee and operation safety automation are integrated.

According to the solid rocket engine ignition model calibration method, an ignition model based on net heat flow is established, and the specific heat absorption capacity is determined by using test and parameter identification means, so that the influence of the grid scale in the conventional ignition model is avoided. In the parameter calibration process, firstly, a small engine similar to an engine to be simulated is designed, it is ensured that the small engine and the engine to be simulated have the same free parameters to be calibrated through theoretical analysis, under the guidance of a parameter calibration optimization algorithm, the performance prediction process is repeatedly executed, and the free parameters to be calibrated are adjusted in each execution performance prediction process. And the calibration result converges.

A structural arrangement for a motorcycle helmet the protective shell of which has a recessed cavity in the upper portion forming protrusions, each protrusion having a space for the rack, and an opening; a front cavity receives a rear fairing and has a second lowered cavit with an opening between the protective hull and the internal hull, on the edges of the visors is fastened a rack with teeth actuated by a small engine with gear strategically arranged in each of the outlets of the protrusions, in the protective hull and on one end of the rack, with actuation by buttons on the helmet or devices with electronic controls by means of radio signals, installed both on the helmet and on the motorcycle or even by remote control, and power is supplied by a battery.

This application relates to the field of high-temperature refractory composite materials technology, and provides a high-density ablation-resistant rudder heat shield cup and its manufacturing method. The manufacturing method includes: Z-direction sewing using 2.5D quartz fabric; placing the sewn fabric into a weft-forming device, which adjusts the fiber state of the fabric and increases the fiber volume content to 50-65%; the fabric after weft-forming is first impregnated and shaped with an inorganic sol, then impregnated and cured with a phenolic solution to obtain a rudder heat shield cup blank; finally, it is machined to obtain the rudder heat shield cup. The density of the rudder heat shield cup reaches 1.6 g / cm³. 3 The above-mentioned linear ablation rate on the kerosene small engine is less than 0.1 mm / s, and the rudder heat protection cup has excellent ablation performance, making it suitable for thermal protection of the air rudder shaft of ballistic missiles.

The application discloses a single-rotor turbofan engine, which comprises a rotating shaft, a fan, a centrifugal compressor, a turbine and a combustion chamber, all of which are located in an engine outer casing shell; the fan rotor, the centrifugal compressor rotor and the turbine rotor are fixedly assembled on the rotating shaft in sequence; a fan airflow channel is formed between the inner wall of the engine outer casing shell and the fan rotor, an inner bypass channel leads to the centrifugal compressor, and an outer bypass channel leads to the exhaust port of the engine; after the inner bypass airflow is discharged from the centrifugal compressor, the inner bypass airflow enters the combustion chamber to be mixed with fuel and combusted to generate high-temperature and high-pressure gas, which drives the turbine rotor to rotate and drives the fan rotor and the centrifugal compressor rotor coaxially arranged with the turbine rotor to rotate to perform work on airflow pressurization; and the high-temperature and high-pressure gas drives the turbine rotor to rotate and is discharged from the exhaust port. The single-rotor turbofan engine has the advantages of less pressurization stages, high pressure ratio, small engine size, simple structure, good reliability and reduced manufacturing cost.

The utility model discloses a small aero-engine horizontal thrust testing device, which belongs to the technical field of aero-engine testing, and comprises a workbench, the top surface of the workbench is fixedly connected with two supporting seats, the side surfaces of the two supporting seats are provided with sliding chutes, and a plurality of sliding columns are connected between the two sliding chutes in a sliding manner. According to the utility model, the small-sized engine is installed and supported through cooperation of the supporting seat, the sliding groove, the sliding column, the movable bottom plate and the installation mechanism, and the small-sized engine drives the movable bottom plate and the sliding column to slide forwards during detection, so that the thrust of the small-sized engine can be tested by using the thrust sensor in front of the movable bottom plate; and lubricating oil is injected into the inner cavity of the sliding groove through the oil injection mechanism, and the friction force between the sliding groove and the sliding column is reduced, so that the accuracy of testing the thrust of the small-sized aero-engine by the thrust sensor is ensured, and the practicability of the horizontal thrust testing device for the small-sized aero-engine is improved.

The invention relates to a rotational flow atomizing nozzle for a small aero-engine, which comprises a nozzle sleeve, a rotational flow sleeve and an oil inlet pipe, and a first rotational flow core and a second rotational flow core are arranged in the nozzle sleeve; the first rotational flow core and the second rotational flow core correspondingly form a rotational flow chamber, a rotational flow groove is formed in the position, located on the edge of the rotational flow chamber, of the first rotational flow core in the circumferential direction, an oil spraying hole is formed in the position, located at the axis of the rotational flow chamber, of the second rotational flow core, and a rotational flow hole is formed in the rotational flow sleeve and corresponds to the oil spraying hole in the second rotational flow core. Structural features of a centrifugal nozzle and a rotational flow sleeve are combined, the rotational flow sleeve is adopted, airflow of a combustion chamber is introduced, the fuel oil atomization effect is improved through the airflow, and the performance of a small engine under ignition and low working conditions is improved; fuel oil is subjected to secondary atomization through airflow of the combustion chamber, and the ignition stability and the low working condition performance of the engine are improved.

The stand-up, handheld machine comprised of a small engine / motor, an extended tubing housing a rotating internal transmission shaft, mounted to a speed reduction box. The speed reduction gearbox transmits rotation and torque to cutting and excavating blades via output shafts. Cutting blades cut and excavate soil to desired depth and width. Operator cuts and excavates trench by linearly moving machine along cutting surface. Operator controls speed of blades through throttle / speed control of power unit.