144 results about "Engine test stand" patented technology

The invention discloses a hybrid power assembly performance matching test bench which comprises an engine, a clutch, a speed changer, an engine controller ECU, a power generating / motor-driven integrated motor ISG, a motor controller IPU, a power battery pack, a battery management system ECU, a vehicle controller HCU, a DC converter DC / DC, a shift mechanism, a clutch pedal, a brake pedal, an accelerator pedal, two dynamometers, a bench control system and a rapid control prototype dSPACE. The test bench has the advantages that the entire vehicle state is simulated on an engine test bench, the main parts of the hybrid power system, the power battery pack, the BCU, the HCU, the IPU and the DC / DC are arranged by simulating the entire vehicle state, the sturcture is compact, the testing programis simple, the performance matching of the hybrid power assembly can be easily realized on the test bench, and NEDC and other condition tests can be conducted by simulating the entire vehicle.

The invention discloses a large cryogenic liquid rocket engine test bed supply system. The system comprises a fuel pressurization system, an oxidizing agent pressurization system, a fuel transport system and an oxidizing agent transport system. According to the system, propellant is pressurized through a gas supercharging method, and the stability and reliability of liquid flow in the engine testing process are guaranteed; the domestic normally-used pump pressurization method is not adopted and has the defects that the output flow of liquid is in an impulse mode, vibration is strong and difficulty is caused in the testing process, so the gas supercharging method has high adaptability to the system; the function that liquid propellant is converted into gas propellant is expanded, the requirements of other testing systems for the gas propellant can be met in future, and the multifunctionality of the testing system is greatly expanded.

The invention relates to a high-altitude simulation testing system for a piston engine. The high-altitude simulation testing system is characterized by comprising an engine test bed (4), an engine air intake temperature control system (1), an engine air intake humidification system (2), an engine air intake pressure control system (3), an engine exhaust cooling device (5) and an engine exhaust vacuum-pumping system (6). The high-altitude simulation testing system provided by the invention can effectively complete the testing of various working conditions of an engine in any combined environment of the three parameters (pressure, temperature and humidity) on the ground and the high-altitude environment with low temperature and low air pressure. Compared with the traditional cabin vacuum-pumping or wind tunnel testing system, the high-altitude simulation testing system provided by the invention has the advantages of simple and reliable system, small investment, low energy consumption, low operation and maintenance cost, multiple functions and the like, and can accurately control the air intake temperature of the engine.

A moveable, collapsible engine test stand having adjustable engine supports and additional accessory supports that are all collapsible adjacent the base of the stand for convenient, compact storage. The stand may include accessories such as a radiator, fuel tank, instrument panel, battery, cooling lines, fuel lines, wiring harnesses, engine dynamometer and the like to permit prolonged operation and monitoring of an engine.

An apparatus for measuring the acceleration of an engine for use in a race car for matching the engine to the car for a particular racetrack and includes an engine test stand having a base and an inertia shaft mounted thereto coupled to a gear box. The test stand includes an engine cart for mounting the engine thereto and positionable for coupling the engine to the gear box and has a plurality of selectively engageable inertia wheels attached thereto. The method includes mounting an engine to the engine cart and positioning the engine cart for alignment with the gear box coupling the engine to the gear box. The engine is then accelerated through a predetermined RPM range so that measurements of elapsed time at preselected RPMs can be determined and a selected load to simulate a racetrack length.

The invention discloses a high-precision simulation inter-cooling constant temperature apparatus for an automobile engine testing stand. The high-precision simulation inter-cooling constant temperature apparatus for an automobile engine testing stand includes a water / air heat exchanger which is communicated with the outlet and the air inlet of a supercharger of an engine and forms an air circulation channel, wherein the medium water outlet of the water / air heat exchanger is communicated to the medium water inlet of the water / air heat exchanger through a liquid storage tank, a tee ratio adjusting valve, a circulating water pump and a flow control valve successively; the medium water outlet of the water / air heat exchanger is also communicated to the other inlet of the tee ratio adjusting valve through the water / air heat exchanger through a pipeline; the heat exchange medium inlet of the water / air heat exchanger is communicated with a cooling water pressure water inlet, and a heat exchange medium outlet is communicated with a cooling water outlet; and an electric heater is arranged on the liquid storage tank. The high-precision simulation inter-cooling constant temperature apparatus for an automobile engine testing stand has the advantages of being small in the temperature fluctuation, being relatively higher in the heating speed, integrally improving accuracy and repeatability ofthe test, and saving energy consumption during the testing process.

The invention belongs to the technical field of automobile manufacturing technology and equipment and discloses an engine test bench with variable compression ratio; a hydraulic transmission system is arranged in the test bench; the support plates at both ends of a cylinder body (11) are connected through a hydraulic cylinder (1) in the hydraulic transmission system, namely, one support plate is connected with the hydraulic cylinder body, while the other support plate is connected with a hydraulic cylinder piston rod; and one of the support plates is fixed on the test bench. With the technical proposal, the invention can continuously achieve compression ratio changes and can shorten and determine the ideal compression ratio cycle of the engine; the invention can quickly obtain the influence parameters of the compression ratio to the engine combustion performance; the invention expands the application scope and can carry out the bench test for gasoline engines and diesel engines; and based on needs, the cylinder body can be made transparent so as to achieve combustion process visualization.

The invention provides an engine test stand system and test method. The engine test stand system comprises a test stand cooling water pipeline, a test stand engine oil pipeline, a test stand fuel oil pipeline, an industrial control computer, a dynamometer and a current signal generator. The test stand cooling water pipeline and the test stand engine oil pipeline are respectively provided with a constant temperature control unit. The test stand fuel oil pipeline is provided with a fuel consumption meter and a constant temperature control unit. The dynamometer, the current signal generator and the fuel consumption meter are electrically connected with the industrial control computer. The engine test method comprises the steps that power parameters, rotating speed parameters and the fuel consumption level of an engine are monitored in real time through the dynamometer, the current signal generator and the fuel consumption meter, and unified control and management are performed through the industrial control computer. System construction is easy and operation is simple, and the engine test result has high reliability so that test cost of engine testing can be greatly saved.

The invention relates to a supersonic engine test stand, which comprises a supply source, a temperature simulation unit, a simulation chamber, a supersonic nozzle and an exhaust ejector, wherein the supply source includes a fuel supply source, an oxygen supply source, an engine intake air supply source, an alcohol supply source and an ejector active air flow supply source; the temperature simulation unit includes a pipe body and a shell, the pipe body is located inside the shell and internally provided with a first medium channel, and the space between the outer wall of the pipe body and the inner wall of the shell forms a second medium channel; a tested engine is located in the simulation chamber; and the supersonic nozzle includes an inlet equal-straightness section, a subsonic convergence section, an initial supersonic expansion section and a supersonic expansion section which are coaxially and fixedly connected in sequence. The supersonic engine test stand is provided with a Lavalsupersonic nozzle between the temperature simulation unit and an air inlet of the engine, and realizes the simulation for the air inlet state of a supersonic engine during a supersonic engine and engine ground test.

The invention relates to a quick change device of an engine test bed, which comprises a quick change trolley (2), adjustable legs (3), an aligning device (5), a dynamometer (6), a clamping device (7) and a positioning base plate (8), wherein the dynamometer (6), the clamping device (7) and the positioning base plate (8) are fixedly on an installation base plate (1), the quick change device is characterized in that the an engine (4) is fixed on the quick change trolley (2) by the adjustable legs (3) and is aligned to the quick change trolley (2) by the aligning device (5), and the quick change trolley (2) is aligned to the dynamometer (6) by the positioning base plate (8). By the quick change device, the engine can be quickly positioned, and the dynamometer can be quickly aligned and connected.

The invention provides a method for benchmarking an engine stand based on whole vehicle simulation operation, which specifically comprises the following steps: (1) collecting data of a disclosed benchmarking engine and a carrying vehicle model, and establishing basic information of a database; (2) collecting OBD data and electrical signals of the benchmarking engine and the carrying vehicle to obtain the signal type, waveform, speed and frequency relationship; (3) removing the engine from the whole vehicle, separating the engine from a gearbox, and building a benchmarking test stand system; and (4) running the stand system to enable the whole vehicle simulation operation function to ensure the normal ignition operation of the benchmarking engine. The method for benchmarking the engine stand based on the vehicle simulation operation according to the invention effectively solves the problem that various benchmarking engines cannot be normally ignited on the stand, and ensures successfulimplementation of the benchmarking test of the engine stand. The method of the present invention is reliable and effective, and has wide versatility.

A modified engine testing bench oil constant temperature control method draws oil from the oil sump of the engine and injects the cooled oil back to the oil sump. It can allow the oil flow meeting the max circulation flow of the required oil of the oil sump, making timely monitoring of the oil temperature, controlling the oil temperature of the oil sump through adjusting the oil flow, filtering the oil at the input and output to ensure the quality of the oil. The modified engine testing bench oil temperature constant control system connects with the engine oil sump through the input and output composed of oil extraction and delivery device, cooling device, oil flow adjusting valve. The advantage is that it will not affect the major oil channel pressure of the engine, with high oil temperature control precision, low cost, better meeting the requirement for engine performance testing and the reliability testing of the engine for engine oil temperature control.

The invention relates to a testing device of a motor, in particular to a motor test platform which comprises a butt joint guide rail and a movable platform, wherein the butt joint guide rail backward and forward extends along the butt joint direction and is arranged on the test platform, the movable platform is capable of moving on the butt joint guide rail in a guiding mode due to the fact that the movable platform is provided with a platform guide rail which fits in with the butt joint guide rail. At least two pairs of idler wheels are arranged at the bottom of the movable platform along the backward and forward direction. Rollaway nests which are used for the idler wheels to roll and move backward and forward are arranged on the test platform. Each rollaway nest is provided with steps which are used for enabling each idler wheel to drop, wherein the drop height is higher than height difference between the butt joint guide rail and the platform guide rail when the movable platform is supported on the rollaway nests through the idler wheels. A lifting mechanism is provided with the butt joint guide rail, the platform guide rail, the rollaway nests or the idler wheels, the lifting mechanism is provided with vertical displacement output and enables the idler wheels to be supported on the rollaway nests, and the butt joint guide rail and the platform guide rail move and are close to each other to form sliding fitting through the lifting mechanism or the butt joint guide rail and the platform guide rail move and separate in the opposite direction through the lifting mechanism. The motor test platform has the advantages of being capable of easily achieving transfer of the movable platform from a preparation room to a test room and butt joint when the motor test platform is used for testing.

The invention discloses a self-calibration thrust measurement device for an engine test bench, and relates to a mechanical measurement device. The self-calibration thrust measurement device comprises a movable frame, a hydraulic cylinder, a power transmission device, a self-calibration sensor, a measurement sensor, a guide system and a fixed frame, wherein the fixed frame is fixedly connected with the ground; the movable frame is arranged above the fixed frame; the pressure output end of the hydraulic cylinder is connected with the power transmission device; the power transmission device is connected with the self-calibration sensor; the self-calibration sensor and the measurement sensor are fixed on the movable frame; the hydraulic cylinder generates thrust, and then acts on the self-calibration sensor through the power transmission device; the self-calibration sensor exerts the thrust on the movable frame; the movable frame moves and transmits acting force to the measurement sensor; the guide system moves along with the movable frame and elastically deforms; the guide system drives the movable frame to restore to the normal position after the hydraulic cylinder stops working. By adopting the self-calibration thrust measurement device, an error on the measured numerical value caused by rigidity of the system can be calculated; meanwhile, the repeatability of a plurality of experiments is ensured; the test accuracy is greatly improved.

The invention discloses a spray device designed aiming at a small-sized engine test bed. The spray device comprises a water supplying system and an engine tail flame guiding system; two ends of a manual cut-off valve with water supply are respectively connected with a tap water pipe and a boosting pump in a laboratory; two ends of an electromagnetic valve are respectively connected with the boosting pump and a water slot inlet; a water slot is provided with two outlets; one outlet is connected with a spray ring while the other outlet is connected with the manual cut-off valve; the water slot is positioned at the periphery of a convergence section and an extension section of a small-sized rocket engine; the spray ring is a round ring structure, is embedded into the extension section and is provided with spray holes; water in the water slot is sprayed into the extension section by the spray holes; the engine tail flame guiding system comprises a convergence section and an extension section; the convergence section is embedded in a wall, is positioned behind the small-sized rocket engine and is used for guiding burning products; the convergence section is connected with the extension section connected with a support. The small-sized high-speed large dynamic digital receiver system is suitable for being used in a closed space and for performing guiding, cooling and denoising processing on tail flame after a small-sized rocket engine test.

The invention relates to a real-time monitoring equipment operation and maintenance management system of an engine test bed, and belongs to the field of equipment maintenance and fault diagnosis. The invention provides an engine experiment bench system having on-line monitoring and maintenance management, and includes a hardware module, a test run stand on-line monitoring module, and a web-based production equipment operation and maintenance management module. The real-time monitoring equipment operation and maintenance management system of the engine test bed can realize multi-parameter and multi-channel data on-line monitoring on a test run stand, adopts a database technology to realize real-time filing of an engine test process, is a complete and unified management platform integrating storage, display, management and analysis, and through analysis of eight different faults of the test run stand, the defect that an existing data acquisition system cannot parallelly collect signals and analyzed faults are single is overcome.

The invention discloses an engine test bed which comprises an air inlet system, an engine thrust measurement rack, an exhaust pipeline, a tail gas treatment system and a simulation cabin, wherein theengine thrust measurement rack is fixedly installed in the simulation cabin; a tested engine is installed on the engine thrust measurement rack; the air inlet system communicates with the tested engine; and one end of the exhaust pipeline penetrates through the surface of a shell of the simulation cabin to be fixedly installed in the simulation cabin, and the other end of the exhaust pipeline fixedly communicates with the tail gas treatment system. According to the engine test bed, the adjustment speed of the air inlet system is high, so that the adjustment time of engine air inlet simulationof the test bed is shortened, the test cost is reduced, and energy waste is avoided. Meanwhile, the engine thrust measurement rack realizes measurement of engine thrust and is simple in structure. Inaddition, treatment of tail gas of the engine test bed is realized, so that the gas discharged from an air outlet of an alkaline spray tower meets the national pollutant emission standards.

A compliant mounting adapter for mounting an engine to a test stand includes: a body having: a first mounting interface configured for being coupled to the test stand; a second mounting interface configured for being coupled to the engine, the second mounting interface spaced-away from the first mounting interface; and a spanning element interconnecting the first and second mounting interfaces. The body is sufficiently flexible so as to permit movement relative movement of the two mounting interfaces, in response to forces generated by engine operation, in at least two degrees of freedom, and has a predetermined stiffness in each of the at least two degrees of freedom, with the predetermined stiffness of each degree of freedom being substantially independent from the stiffness of the other degrees of freedom.

A modified engine testing bench oil constant temperature control method draws oil from the oil sump of the engine and injects the cooled oil back to the oil sump. It can allow the oil flow meeting themax circulation flow of the required oil of the oil sump, making timely monitoring of the oil temperature, controlling the oil temperature of the oil sump through adjusting the oil flow, filtering the oil at the input and output to ensure the quality of the oil. The modified engine testing bench oil temperature constant control system connects with the engine oil sump through the input and outputcomposed of oil extraction and delivery device, cooling device, oil flow adjusting valve. The advantage is that it will not affect the major oil channel pressure of the engine, with high oil temperature control precision, low cost, better meeting the requirement for engine performance testing and the reliability testing of the engine for engine oil temperature control.

An engine test table is composed by facilitating a group of movable pillars on a chute steel plate; the movable pillars are connected with the engine to be tested via connecting support device; the connecting support device is a device for fixing the engine after leading it to rotate along the axial center line. The connecting support device is respectively composed of a support A and a support B. The support A is formed in an index plate pattern by sequentially connecting the chute steel plate, the rotating steel plate and the engine connecting plate. The support B is composed by connecting a rotating beam and a beam, the middle part of each beam comprises a center hole via which the bolts pass to integrally connect the beams. The movable pillar is an adjustable pillar composed of a two-segment structure with bolt and bolt hole, capable of adjusting forward and backward height and position of the engine. By only using the device of index plate type for fixing and connecting the engine after leading it to rotate along the axial center line, and height adjusting pillar composed of a two-segment structure with bolt and bolt hole, the invention can adjust the rotating angle of axial center line along which the engine rotates and adjust the forward and backward height and position of the engine with simple, reliable and safe structure.

The embodiment of the invention discloses an engine test stand. The engine test stand comprises a control area, an experiment area, an oil supply system, a power supply system, a compressed air system, a chilled water system, power measurement equipment, fuel consumption measurement equipment, a data acquisition system, a control system and a case of which the bottom has a planar structure, wherein the control area, the experiment area, the oil supply system, the power supply system, the compressed air system, the chilled water system, the power measurement equipment, a hydraulic power measurement machine, the fuel consumption measurement equipment, the data acquisition system and the control system are all arranged in the case; and the power supply system is a power unit. The engine test stand is provided with a cooling circulation system and the power supply system, so the engine test stand can be used for specific experiments in depopulated areas.

The invention provides a turbojet engine test bench system which comprises a stand machinery system, an exhausting system, a fuel oil system and an air compression system. The stand machinery system is arranged in an engine test room, and comprises an engine test stand, a workbench, a whole machine test area; the engine test stand is mounted in a position corresponding to the engine test stand onthe workbench, and the whole machine test area is arranged independent from the workbench; the exhausting system comprises an ejection cylinder and an exhausting cylinder, and each engine test stand corresponds to one exhausting system; the ejection cylinder is provided with a belt wheel support, and can move axially along the rear end of the engine test stand arrangement position and a guide railin the exhausting cylinder; and an ejection port between the exhausting cylinder and the ejection cylinder is provided with a plugging cover, the plugging cover is arranged in the wall of the enginetest room, and the exhausting cylinder extends into a vent gas tower adjacent to the engine test room. The engine test bench system can improve the spatial utilization rate and work efficiency of a test bench effectively.

A supersonic engine test bench comprises a gas inlet system, an engine thrust measurement bench, an exhaust system, a tail gas treatment system, and a high-altitude simulation cabin. The high-altitudesimulation cabin is of a sealed shell structure, the engine thrust measurement bench is fixedly installed in the high-altitude simulation cabin, and a tested engine is installed on the engine thrustmeasurement bench; and the gas inlet system communicates with the tested engine or the exhaust system, one end of the exhaust system penetrates the surface of the shell of the high-altitude simulationcabin and is fixedly installed in the high-altitude simulation cabin, and the other end of the exhaust system fixedly communicates with the tail gas treatment system. According to the supersonic engine test bench, supersonic speed air inlet state simulation of the supersonic speed engine is achieved during ground tests of the supersonic speed engine and the engine; and moreover, the engine thrustmeasurement bench achieves the measurement of the engine thrust, is simple in structure, and achieves the treatment of the tail gas of the engine test bench, so that the gas discharged from the gas outlet of an alkaline spray tower meets the national pollutant discharge standard.

The invention relates to a quasi-three-dimensional flow virtual numerical test method of a turbine engine, belonging to the technical field of aero-engine test and verification. The invention providesa virtual numerical test method for quasi-three-dimensional flow of turbine engine based on aerodynamic simulation technology. By dividing the whole engine area reasonably, the quasi-three-dimensional flow of turbine engine is calculated by numerical iteration, and the steady or transient flow law is obtained. This method can be used as a virtual numerical simulation test method of engine test bench. Through numerical experiment, the distribution law of flow field in turbine engine can be obtained, and the aerodynamic performance of engine can be grasped.

The embodiment of the invention discloses an engine test stand device. The engine test stand device comprises a front stand base, a rear stand base, a first supporting column, a second supporting column, a front stand top board, a rear stand top board, a front-and-back automatic adjusting mechanism, a front end left-and-right automatic adjusting mechanism, a rear end left-and-right automatic adjusting mechanism, a front end up-and-down automatic adjusting mechanism, a rear end up-and-down automatic adjusting mechanism, a control cabinet and a detection sensor. The detection sensor is used for detecting the end surface flatness and radial coaxiality, relative to a dynamometer, of an engine flywheel, and transmitting the detection data to the control cabinet. The control cabinet analyzes and processes the detection data and then transmits corresponding adjusting commands to the front-and-back automatic adjusting mechanism, the front end left-and-right automatic adjusting mechanism, the rear end left-and-right automatic adjusting mechanism, the front end up-and-down automatic adjusting mechanism and the rear end up-and-down automatic adjusting mechanism.

The invention provides an engine test bench. The engine test bench comprises an engine support which is used for supporting an engine, an oil supply device which is connected with an engine oil tank which is used for supplying fuel oil to the engine, an engine oil supply device which is connected with an engine oil pump which is used for providing engine oil for the engine, a water circulation device which comprises a water supply tank and a cooling water tank, and a control cabinet. The water supply tank and the cooling water tank are connected through a pipe. The water supply tank is connected with an engine water pump through a water supply pipe. The cooling water tank is used for cooling the engine oil tank. The engine oil tank is connected with the engine oil pump. The control cabinet comprises an instrument panel, a water temperature controller and a rotation speed controller. The instrument panel is connected with a built-in sensor of the engine to display a signal detected by the built-in sensor. The water temperature controller is used for controlling the water supply temperature of the water circulation device. The engine test bench has the advantages of improved test efficiency and reduced test cost.

The invention discloses a design method of a fault response generator for a testbed of a liquid propellant rocket engine. The design method comprises following steps of: firstly, evaluating fault degree of historical test data of the liquid propellant rocket engine in order to obtain fault diagnosis information, fault predication information and fault level; secondly, gathering fault level of an overall testing stage in order to obtain a level curve of fault level and setting up a fault level library; thirdly, setting up mappings of fault diagnosis information, fault predication information and the fault level library and obtaining a fault response decision model according to the fact that all levels of the fault level curve in the fault level library respectively correspond to maintenance levels obtained by historical maintenance conditions; and fourth, linking different fault intervention and control measures to different maintenance levels in order to finish the design of the fault response generator for the testbed of the liquid propellant rocket engine. The design method of the fault response generator for the testbed of the liquid propellant rocket engine has following beneficial effects: a maintenance scheme can be made in advance for solving different faults and symptoms in order to decrease maintenance blind spots; and service lifetime and reliability of a testing system can be prolonged and improved.