34 results about "Rapid compression machine" patented technology

The invention relates to a constant-volume firebomb system for simulating combustion of an engine, for solving the technical problems of difficult observation of a flame combustion process in an actual engine, difficult evaluation and determination of a charcoal smoke generation amount at certain time in the combustion process and difficult realization of real-time sampling analysis of combustion products under the condition of a single variable. The constant-volume firebomb system for simulating the combustion of the engine comprises the following components: a firebomb body with a cylindrical cavity; a heating interlayer nested in the periphery of the firebomb body; a fuel injector; a pressure sensor; a temperature sensor; an air inlet channel; an exhaust sampling system; a high-pressure injection fuel oil supply system; a synchronization data acquisition system; a highs-speed shooting system; and a single-chip microcomputer control system. The constant-volume firebomb system provided by the invention has the following advantages: compared to a specially reconstructed single-cylinder machine or a rapid compressor, the cost is lower, and accurate control of the single variable is easily realized.

A single speed compressor is provided with a switching device and control for turning the compressor drive motor ON and OFF in repeated succession at a selected ON time / OFF time ratio within a selected cycle time interval. The ON / OFF ratio and cycle time interval are selected to maintain desired temperature and / or humidity control within a conditioned space.

The invention relates to the technical field of waste recycling, in particular to an automatic recycling and classifying device for beverage bottles and cans, and solves the technical problems that inthe prior art, the beverage bottles and cans are manually recycled, which is complex in recovery process and low in efficiency, and the beverage bottles and cans cannot be automatically classified. The automatic recycling and classifying device for the beverage bottles and cans comprises a device body, and further comprises an adjusting rotating seat which is arranged in the device body, a rapidcompression mechanism for pressing the beverage bottles and cans is arranged above the adjusting rotating seat, a movable material control mechanism is arranged inside the adjusting rotating seat, oneside of the adjusting rotating seat is provided with a main driving mechanism which is used for driving the adjusting rotating seat to do variable-speed circular motion, and the beverage bottles andcans are matched with the movable material control mechanism to complete compression moulding inside the adjusting rotating seat and then are automatically classified and recycled according the compressive strength of the beverage bottles and cans and under the action of the main driving mechanism. The an automatic recycling and classifying device for the beverage bottles and cans is ingenious indesign, and the beverage bottles and cans can be automatically recycled without workers, so that time and labor are saved, automatic classification is realized, and recovery efficiency of the beveragebottles and cans is effectively improved, which all make the eautomatic recycling and classifying device for the beverage bottles and cans be worthy of popularization.

A novel process for activating available compressors in multiple compressor air conditioning systems, using an Optimum Stage-Up Process. This process is programmed into a controller as an algorithm, to provide a process for fast compressor start. This process shortens the time to initiate operation of compressors in a multi-compressor air conditioning system required to meet the demand call under any load condition, and hence shortens the time required for the actual sensed interior region air temperature to reach the interior region temperature set point. The Optimum Stage-up Algorithm estimates the number of compressor stages or steps that must be initiated, based on sensed or measured values, to meet the demand at any load condition. These measured values include the sensed temperature of the interior region being cooled, which is compared to the temperature set point of this interior region as well as measured mixed air temperature and supply air temperature.

According to a thermal compensation method for a combustion chamber of a rapid compressor disclosed by the invention, under the condition of no thermal compensation, the heat dissipation model is used for obtaining a predicted value of a pressure decline curve caused by heat dissipation and mass transfer of the combustion chamber within a set time range, and the predicted value of the model is compared with a pressure curve measured value obtained by an experiment; model prediction and experimental measurement results are made to be the same by adjusting heat exchange coefficients, the number of calculation units and time steps of combustion chamber calculation units in the heat dissipation model, then adjusted parameters are input into the model to operate under the thermal compensation condition, and a piston motion curve needed by thermal compensation under the working condition is obtained. The piston movement speed of the rapid compressor is controlled according to the obtained piston movement speed curve, and the purpose of heat dissipating capacity compensation of a core area of a combustion chamber is achieved; according to the method, the heat loss of the combustion chamber of the rapid compressor is reduced, the maintaining time of a high-temperature and high-pressure environment is prolonged, and a more ideal thermodynamic environment is provided for research of the fuel oxidation ignition dynamics process.

The invention discloses a connecting rod connecting device of a rapid compression machine. The rapid compression machine comprises a fuel compression piston connecting rod and a driving piston connecting rod, and the fuel compression piston connecting rod is connected with the driving piston connecting rod through the connecting device. The connecting device comprises a connecting piston and a spline shaft which are connected with each other in a buckling mode and are capable of moving mutually in a connected state. The fuel compression piston connecting rod is movably connected with the driving piston connecting rod through the connecting device, the mounting positions of both the fuel compression piston connecting rod and the driving piston connecting rod are adaptively adjusted during assembly, the requirement for the machining accuracy of the two connecting rods and the requirement for the coaxiality accuracy of the two connecting rods during assembly are lowered, and the production cost is reduced.

The invention discloses a rapid compressor experimenting platform for a laboratory. The rapid compressor experimenting platform comprises a combustion chamber unit, a brake cylinder unit and a driving cylinder unit. The brake cylinder unit comprises a brake cylinder body, a brake cylinder rear cover and a brake piston, a first connecting rod is connected between the brake piston and a combustion chamber piston, and the lower stop point position of the brake piston is determined by the position of the brake cylinder rear cover. The driving cylinder unit comprises a driving piston, and a second connecting rod is connected between the driving piston and the brake piston. A plurality of compression ratio adjusting gaskets capable of being arranged between the brake cylinder rear cover and the brake cylinder body are arranged. Each compression ratio adjusting gasket is composed of a pair of cohesive semicircular gasket bodies, and the total thickness of the arranged compression ratio adjusting gaskets is determined according to the lower stop point position of the combustion chamber piston under the premise that the upper stop point position of the combustion chamber piston is kept unchanged. According to the rapid compressor experimenting platform for the laboratory, the gaskets are additionally arranged at the brake cylinder rear cover to change the initial position of the combustion chamber piston and maintain the volume of a clearance unchanged so as to adjust the compression ratio.

The invention provides an experimental device and method based on a fast compressor, comprising: a compression cylinder, including a cylinder barrel provided with a through hole and a piston movably inserted in the through hole; a combustion component, sealed and connected to the cylinder The first end of the barrel and the side of the combustion component close to the cylinder barrel construct a combustion chamber connected to the through hole; the trigger device is installed on the side wall of the combustion chamber; the position sensor is installed on the The cylinder is suitable for sensing the position of the piston; the signal generator is communicatively connected to the position sensor and the trigger device. Precisely controlling the triggering time of the triggering device can establish a data model between the triggering time and engine knocking, which is conducive to in-depth research and utilization of the engine knocking phenomenon, thereby improving the thermal efficiency of the engine. At the same time, the experimental device can also be applied to other combustion studies that rely on precise triggering.

The invention relates to a combustion performance test bench of an internal combustion engine based on a rapid compression / compression expander, belonging to the field of internal combustion engine testing. The invention includes a fast press and an air supply system. The present invention uses a linear motor as a power source to push the piston to move, which greatly simplifies the structure of the fast compressor; by changing the control strategy of the linear motor, the fast compressor can work in a fast compressor (constant volume combustion) and a fast compression expander (free expansion) ) Under the two modes, the device has strong adaptability; it has the characteristics of adjustable compression ratio, multi-fuel adaptability and speed variability. The internal combustion engine combustion performance test bench based on the rapid compression / compression expander of the present invention simplifies the bench structure, reduces the overall volume, reduces the complexity of the control system, and improves the adaptability and reliability of the internal combustion engine test bench sex.

The invention relates to equipment for researching shock wave and flame propagation characteristics in a fuel combustion process, and provides a schlieren system based on a rapid compressor. The system comprises a light source, a high-speed camera, a knife edge, a spectroscope, a first concave mirror, a second concave mirror and the rapid compressor; the rapid compressor comprises a combustion chamber and a compression chamber, wherein one end of the combustion chamber is covered with a visual end cover, and the other end of the combustion chamber is communicated with the compression chamber;a mirror surface is arranged at the end, facing the visual end cover, of a piston in the compression chamber; a light source and a diaphragm are arranged on an incident light path of the first concavemirror, and the spectroscope is arranged on a reflected light path; the rapid compressor is arranged on a reflected light path of the spectroscope, and the visual end cover is located on the reflected light path of the spectroscope, and the second concave mirror is arranged on a transmitted light path of the spectroscope; the knife edge and the high-speed camera are sequentially arranged on the reflected light path of the second concave mirror. By means of the visual end cover and the mirror surface arranged at one end of the piston, flame and shock wave structures in the combustion chamber can be obtained in real time, and flow field distribution can be captured.

The invention discloses a compression end point temperature adjusting method for a fast compressor in a lab. The method comprises the following steps that 1 ) determining the components of combustiblemixed gas in an experiment of the fast compressor; 2 ) determining the total pressure of the combustible mixed gas in a combustion chamber to be P, and calculating the corresponding partial pressurePi = P * Xi according to volume fraction of each gas; 3 ) after evacuating a gas mixing tank, filling the gas sequentially according to the corresponding gas partial pressure to complete the configuration of the combustible gas mixture; 4 ) compressing the combustible mixed gas for one step, and recording the pressure change in the combustion chamber ; 5 ) calculating is carried out according to an ideal gas heat insulation formula to obtain the compression end point temperature Tc of the experiment; and 6 ) replacing a part of argon in diluent gas with nitrogen, repeating the steps 3 )-5 ), and obtaining a compression end point temperature which is lower than the first time. According to the method, under the condition that the structure of an existing experimental device is not changed,the compression end point temperature is changed by changing the diluent gas component in the mixed gas, so that the experimental working condition range is effectively widened.

The invention discloses an optical fast compressor combustion cylinder capable of shooting by the schlieren method. The front and rear end surfaces of the combustion cylinder main body run through the combustion chamber cavity. The front and rear ends of the combustion chamber cavity are respectively provided with window positioning cavities. Cylinder pressure sensor mounting holes and exhaust holes are set, spark plug mounting holes and air intake holes are set on the upper surface, combustion cylinder positioning cavity is set on the right end surface, and a rectangular channel is set between the combustion cylinder positioning cavity and the combustion chamber cavity from left to right , conical transition section and compression section; the front and rear ends of the combustion chamber cavity are respectively equipped with quartz glass, and the quartz glass is fixed through the glass baffle; there is a combustion chamber between the two quartz glasses, and the combustion chamber and the cylinder pressure sensor installation hole, The exhaust hole, the rectangular passage and the spark plug installation hole are connected, and the rectangular passage is connected with the air intake hole. The present invention mainly changes the direction of the axis of the combustion chamber so that it is perpendicular to the moving direction of the piston, so as to meet the requirements of the optical path arrangement of the schlieren method.

An electromagnetic braking system and control method, with the system having a CCU, a braking cylinder, a push rod, an electromagnetic braking ring, an electromagnetic braking piston fixed to the push rod, a first shading plate and a second shading plate, a photoelectric sensor fixed near the push rod, and an electromagnetic braking control circuit, and the control method including following the steps: initial estimating of the braking distance (l) according to the current magnitude, electromagnetic force between the two electromagnetic coils and initial velocity (v) of the push rod, arranging a restoration distance (Δl) between the top dead center and the piston after braking, installing two shading plates and the photoelectric sensor; and setting the distance between the two electromagnetic coils to when the starts braking.