CN1290856A - Measurement of engine mechanical efficiency and back drawing test system - Google Patents
Measurement of engine mechanical efficiency and back drawing test system Download PDFInfo
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- CN1290856A CN1290856A CN00133212A CN00133212A CN1290856A CN 1290856 A CN1290856 A CN 1290856A CN 00133212 A CN00133212 A CN 00133212A CN 00133212 A CN00133212 A CN 00133212A CN 1290856 A CN1290856 A CN 1290856A
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Abstract
The system includes computer, frequency varying speed regulating AC motor, frequency varying speed regulator, intelligent shaft coupling, torque, rotation speed and power measuring instrument, cooling water temperature and machine oil temperature monitoring instrument, engine fuel oil cut-off device, brake/dynamometer, brake/dynamometer controller, shaft coupling and power supply control cabinet, etc. The present invention has the features of large drawing power wide speed regulating range, high speed regulating accuracy, fast response speed, high automation, low cost, etc. The present invention can measure effective power, mechanical power loss and machanical efficiency of engines.
Description
The invention belongs to the Engine Block Test technology, particularly a kind of measurement of engine mechanical efficiency and towing astern experimental technique are specifically related to a kind of measurement of engine mechanical efficiency and back drawing test system of ac variable frequency speed regulation transmission of electromechanical integration.
In prior art, because dynamometer machines such as waterpower and current vortexs, all can not the towing astern engine, thereby the measurement of test of engine towing astern and mechanical efficiency thereof, nearly all on the electric dynamometer of import, carry out at present.But because electric dynamometer is with high content of technology, domestic still do not have production, and import price is very expensive, and domestic at present only seldom unit have.Will do above-mentioned experiment with measuring for most of units, the unit that only goes to have electric dynamometer does experiment.This spends all very big on human and material resources, financial resources, and is having a strong impact on the research and development of engine.
Employing adds the motor towing astern by torque gauge, also can be used for above-mentioned experiment with measuring, two kinds of schemes are arranged at present: the one, the DC motor speed-regulating transmission scheme, for example Beijing Institute of Technology adopts 7.5KW/110V direct current generator, TDGC-3/0.5 type pressure regulator, with TR-5 torque rotary speed sensor and supporting Displaying Meter, be used for the friction of FG-1 type air-cooled diesel engine, wear test etc.Its advantage is that the DC speed regulation performance is good, and precision and rapidity can both meet the demands.Shortcoming is that the brush and the commutator of direct current generator is the consumable accessory structure, limited its environment for use, particularly limited the raising of maximum speed and capacity, as the direct current generator more than the 20KW, maximum speed is lower than 3600r/min, and needs often to safeguard and maintenance; The 2nd, exchange revolutional slip speed governing transmission scheme.It is a principal mode with low synchronous cascade control or electromagnetic clutch speed governing.The as above controllable silicon electric dynamometer of extra large internal-combustion engine plant, adopt the swing structure of wound asynchronous motor, with the towing astern device of normal open company in Nantong, adopt Y180L-4 asynchronous machine and YCT250-4B electromagnetic clutch (speed adjustable range 1320-132r/min) for my company's making-up shop design.Its advantage is a low price, and shortcoming is that speed adjustable range is narrow, and maximum speed is less than 3000r/min, and adjusting speed accuracy is not high, can not respond fast, can only be used for less demanding low-powered engine startup, rub and close occasion.
Purpose of the present invention aims to provide that a kind of to have power draw big, speed-regulating range width, and the adjusting speed accuracy height, response speed is fast, control work condition automatically, automatic measured data both can be used as dynamometer machine and had used, and measured effective engine power; Also can be used as the towing astern testing equipment, measurement engine mechanical efficiency and the back drawing test system measuring the engine mechanical wasted power and measure engine mechanical efficiency, to overcome the long-term problem that never solves of prior art, satisfy the growing market and the demand of scientific research and development.
It is well known that the measurement key of engine mechanical efficiency is how to measure the engine mechanical wasted power, and our formula of known calculations engine mechanical efficiency is:
η={Ne／(Ne+Nm)}×100％
Ne is an effective engine power
Nm is the engine mechanical wasted power
Effective engine power Ne is exactly the power of our engine that measures with dynamometer machine usually.This is that everybody is familiar with.So the measurement of engine mechanical efficiency is a problem how to measure engine mechanical wasted power Nm after all.And the measurement engine mechanical wasted power that people have grasped has several method, and the present invention has selected motoring breakdown.The main innovation of the present invention partly is that part of engine towing astern device.And the significance of research engine towing astern test is:
The one, reducing friction loss is a worldwide research topic.At present, each state all being devoted to energy-conservation and environmental protection research, reduces friction loss and becomes one of important research work content of internal combustion engine industry.Document shows, the every reduction by 10% of gasoline engine friction loss, and economy can be improved 3-5%, the also corresponding raising of dynamic property.Diesel engine is also so near.The test of engine towing astern is research engine friction loss the best way.
The 2nd, the practical work process of engine is quite complicated, and the factor of influence is very many, still has a series of problems to await further research and discussion so far.Practice shows, the course of work of the method research engine of employing towing astern can foreclose oil spout and burning two big complicated factors, thereby gives prominence to the influence of other factors, makes the course of work simplify and be easy to and studies.Its achievement is very helpful to the research of engine practical work process conversely.
Because above-mentioned rational knowledge, the present invention realizes its purpose general technical design, mainly comprises the content of the following aspects:
1. effective engine power measurement mechanism and mechanical loss power measurement mechanism are combined as an integral body;
2. there is the operating mode of catching fire to transfer the switching device shifter of towing astern operating mode to;
3. use motoring breakdown and measurement and control of temperature, simulate the actual machine loss of the engine ignition operating mode under same rotating speed, the synthermal parameter;
4. there is one can realize high-power dragging and the following frequency control kinematic train of operation of supersynchronous rotating speed, thereby reaches the purpose that simulated engine surpasses the above operation of 3000r/min;
5. a chilled water and machine oil auxiliary heater and cooling water temperature and oil temperature monitor are arranged, guarantee to measure the temperature parameter difference of useful power and mechanical loss power in ± 1 ℃ of scope;
6. there is one to guarantee each several part coordination, computer measurement and control device quickly and accurately.
Accompanying drawing 1, given is the block diagram of a kind of array configuration of the present invention.
Accompanying drawing 2, given is the block diagram of the another kind of array configuration of the present invention.
Below in conjunction with accompanying drawing, the present invention is realized the technical scheme of its purpose is described specifically.
The present invention realizes one of technical scheme that its purpose is taked, and sees also accompanying drawing 1. It comprises computer 1, exchanges to become Frequently buncher 3, variable-frequency governor 4, intelligence coupling 5, torque/speed/power measurement instruments 6, cooling water temperature and Oil temperature monitor 7, engine fuel cutter 8, brake/dynamometer 9, braking/measurement of power controller 10, connection Axial organ 11 and power-supply controller of electric 12. And said ac variable frequency speed regulation motor 3, by lead 3-4 and variable-frequency governor 4 Be and be electrically connected, and variable-frequency governor 4 by interface and lead 4-1, is connected with computer 1 communication. Said system Moving device/dynamometer 9 is electrically connected by lead 9-10 and braking/measurement of power controller 10; Braking/measurement of power controller 10 is logical Cross interface and lead 10-1, be connected with computer 1 communication. Said intelligence coupling 5, by lead 5-6 and torque/ Rotating speed/power measurement instruments 6 is electrically connected, and torque/speed/power measurement instruments 6 is by interface and lead 6-1, with computer 1 communication connects. Said engine fuel cutter 8 is connected institute with lead 8-1 with computer 1 communication by interface The cooling water temperature of saying and oil temperature monitor 7 are connected institute with lead 7-1 with computer 1 communication via interface The ac variable frequency speed regulation motor 3 of saying by shaft coupling 11, is axle between the two with brake/dynamometer 9 and links, and institute Brake/dynamometer 9 and the intelligence coupling 5 said are axle between the two and link, and said electrical power control cabinet 12, then By its lead respectively with computer 1, ac variable frequency speed regulation motor 3, variable-frequency governor 4, intelligence coupling 5, turn to Square/rotating speed/power measurement instruments 6, cooling water temperature and oil temperature monitor 7, engine fuel cutter 8, braking Device/dynamometer 9, braking/measurement of power controller 10 are and are electrically connected.
Under general technical design of the present invention, realize that another technical scheme of its purpose is: said torque/speed/power Measuring instrument 6, cooling water temperature and oil temperature monitor 7, engine fuel cutter 8, braking/measurement of power controller 10 Can be integrated in device, its function is finished by computer 1 and corresponding sensor and actuator, sees also accompanying drawing 2. It include computer 1, ac variable frequency speed regulation motor 3, variable-frequency governor 4, intelligence coupling 5, brake 9, Shaft coupling 11, electrical power control cabinet 12 etc. form, and said ac variable frequency speed regulation motor 3, by lead 3-4 and change Frequently speed regulator 4 is electrically connected, and variable-frequency governor 4 is connected with computer 1 communication with lead 4-1 by interface, system Moving device 9 is connected with computer 1 telecommunication by interface and lead 9-1, and intelligence coupling 5 is by interface and lead 5-1, Be connected with computer 1 telecommunication, electrical power control cabinet 12 is then respectively by lead and computer 1, ac variable frequency speed regulation electricity Machine 3, variable-frequency governor 4, intelligence coupling 5, brake 9 etc. are electrically connected.
Towing astern ac variable frequency speed regulation motor 3 of the present invention is alternating current generator, and the speed governing transmission is ac variable frequency speed regulation Transmission. According to speed adjustable range, the comprehensive technical indexes such as adjusting speed accuracy and response speed, its ac variable frequency speed regulation motor 3 Can select respectively 50HZ or 60HZ standard normal asynchronous, or the ac variable frequency speed regulation asynchronous motor, or hand over Stream spindle drive motor, or autosynchronous motor, or commutatorless machine.
And computer 1 also can adopt virtual instrument or single board computer except adopting PC. The present invention is preferred 386 and above computer.
And variable-frequency governor 4 adopts general variable-frequency governor. Simultaneously, according to different control accuracies, also can divide Do not select the u/f frequency converter with closed-loop speed control, or the u/f frequency converter with torque control function, or tape speed passes The vector-control frequency converter of sensor, or the vector-control frequency converter of tape speed sensor not. If select commutatorless machine, Then should select supporting commutatorless machine variable-frequency governor. In order to improve the anti-interference of variable-frequency governor and to reduce frequency conversion The interference that speed regulator itself produces. Visual truth increases inlet wire wave filter or reactor, perhaps output filter and reactance Device. And variable-frequency governor all will mate brake unit, to increase quick response.
And transmission coupling 11 preferably adopts flexible coupling, secondly is yielding coupling or Hooks coupling universal coupling, to protect A card transmitting torque, and do not produce additional bending moment.
And the torque rotary speed sensor of torque/speed/power measurement instruments 6 all adopts noncontacting proximity sensor, in order to improve Certainty of measurement improves reliability and life-span. Wherein torque sensor can be selected rotation coupling strain gauge transducer, or magnetic Cause telescopic or phase difference sensor; Speed probe then can be selected magneto-electric or electro-optical pickoff.
And engine fuel cutter 8, be used for Multi-Cylinder Diesel Engine be one by electronic switch, tractive magnet and power pack The circuit that becomes, the shutdown handle of tractive magnet pulling engine governor, the break-make of control fuel oil. And for single cylinder Machine be a circuit that is formed by electronic switch, magnetic valve and power supply. Be serially connected in the injection pump of engine by magnetic valve And between the high pressure spray oil pipe, the break-make of control fuel oil.
And brake/dynamometer 9 and braking/measurement of power controller 10, be magnetic powder brake or eddy current absorption dynamometer or waterpower survey The braking measurement of power controller of merit device and reply thereof. Wherein magnetic powder brake is simple in structure, easy to install and use, maintenance Simple and easy, the life-span is long, compares with other brake, also has following characteristics: 1. fast response time. Energising is namely produced moment Give birth to braking torque, and moment of torsion increases also very fast. 2. it is good to disconnect performance. When exciting curent disconnected, excess torque was very little. 3. torque and exciting curent are substantially linear, and Torque Control is easy. 4. deciding torque characteristics is that torque is in allowed band In, only depend on the size of exciting curent, and have nothing to do with rotating speed. In order to enlarge the magnetic powder brake range of speeds, can join A speed-changing gear box.
And cooling water temperature and oil temperature monitor 7, by thermistor or semiconductor temperature sensing sensor and digital display meter Form. Why will carry out engine said temperature condition monitoring, be to drag operational situation and approach as much as possible in order to make The operational situation of catching fire. Because said temperature is very big to the impact of frictional work measurement result, when usually measuring effective power Temperature and the temperature when measuring mechanical loss power, both differences are controlled at ± 1 ℃ of range.
The present invention also is fitted with cooling water and machine oil auxiliary heater 16, and said cooling water and machine oil auxiliary heater 16, by lead 12-16, be electrically connected with electrical power control cabinet 12, and by interface and lead 1-16 and computer 1 Telecommunication connects. In order under the lower state of environment temperature, using.
The present invention is an electromechanical integrated product. The concrete association of each several part is: tested engine 13, measure by band The intelligence coupling 5 of function is connected with brake/dynamometer 9, sets operating mode from computer 1, by interface and leading Line 10-1 assigns instruction to brake/measurement of power controller 10, and engine 13 is operated under this operating mode. Originally, meter Calculation machine 1 is assigned the preheating instruction, after engine 13 abundant preheatings, enters under certain setting operating mode again and moves, cold After but coolant-temperature gage and oil temperature are all stablized, the test phase of being allowed for access. With in the intelligence coupling 5 of measurement function Sensor passes to torque/speed/power measurement instruments 6 with the torque and rotational speed signal that detects through lead 5-6, from And measure the effective power Ne of engine under certain operating mode, and meanwhile, by cooling water and oil temperature monitor 7 notes Record temperature parameter relevant with Ne under this operating mode, and send computer 1 to by lead 7-1 and interface. Computer 1 Assign instruction to engine fuel cutter 8 and variable-frequency governor 4 respectively by interface and lead 8-1 and 4-1, will The engine ignition operation switches to the towing astern operation. An equipped high-speed bearing is processed through special reinforcing and high-speed balancing The ac variable frequency speed regulation motor 3 of crossing by shaft coupling 11, is connected with braking/measurement of power controller 9 axles, and then surveys with band The intelligence coupling 5 of amount function is connected axle and is connected with engine, consist of a towing astern system. Can make AC frequency conversion at one Buncher 3 has the above power draw of 30KW, and can operate in (greater than 4000r/min) under the supersynchronous rotating speed The effect of general variable-frequency governor 4 under, rapid towing astern engine 13 makes its also same in above-mentioned setting of stable operation Under the sample rotating speed. In the lower situation of environment temperature, can start cooling water and machine oil auxiliary heater 16, cold to keep But water and oil temperature, the temperature when measuring the effective power state is consistent. Same by the intelligence with measurement function Shaft coupling 5, with torque/speed/power measurement instruments 6, the engine mechanical wasted power Nm that measures under this rotating speed reaches The temperature parameter by cooling water temperature and 7 records of oil temperature monitor that it is relevant, and the same path of process sends to Computer 1. According to formula, calculate the mechanical efficiency η under this operating mode of engine by computer 1. Afterwards, will count Calculate result's (test data) deposit or show at display screen, or by peripheral hardware 2 print, drawing etc. Whole System provides power supply by electrical power control cabinet 12. The quick response of system shows whole switching and measuring process, must protect Card carries out under the monitoring of cooling water temperature and oil temperature monitor 7, and range of temperature, be controlled at ± 1 ℃ it In.
For the test of an operating point, if think that test data is credible, need not reform, then allow computer 1 assign Shut down the instruction that finishes. For reforming or the test of multi-state point, only need repeat above-mentioned circulation.
The course of work of the present invention is described as follows as an example of declared working condition example: at first enter the artificial preparatory stage, with tested Engine 13 is carried out axle with intelligence coupling 5 and is linked by its output shaft, and with cooling water temperature and oil temperature prison Survey the temperature sensor of instrument 7, by the oil sump place that lead 7-13 is set in respectively coolant outlet place and machine oil, incite somebody to action Engine fuel cutter 8 is connected with the engine fuel shearing device by lead 8-13. And allow tested engine 13 preheatings. Enter then the computer testing stage, input declared working condition, and automatic adjustable brake/measurement of power controller 10 With tested engine 13 throttles, engine is stable under the declared working condition, by brake/dynamometer 9 absorbed powers. Allow cooling water temperature and oil temperature stable after, by torque/speed/power measurement instruments 6 record the engine calibration rotating speed, Demarcate output torque and effective power Ne, and write down at this moment cooling water and oil temperature; Start rapidly then fuel-cut Device 8 cuts off tested engine fuel passage, and then tested engine and brake/dynamometer 10 all quit work. With The time rapid power-on, and the frequency conversion that is formed by ac variable frequency speed regulation motor 3, variable-frequency governor 4 and shaft coupling 11 The speed adjustment of motor device, the tested engine 13 of towing astern runs under the above-mentioned rated engine speed, and by torque/speed/power Measuring instrument 6 records mechanical loss power Nm. This process control changes ± 1 ℃ scope at cooling water and oil temperature In. More than operation and measurement are finished by the application software of establishment automatically by computer 1. Can ask by calculating
Engine mechanical efficiency: η={ Ne/ (Ne+Nm) } * 100%
In the above-mentioned formula:
The Ne-effective engine power
Nm-engine mechanical wasted power
More than all metrical informations, all gather to computing machine 1, computing machine 1 is by its application software, notes down, analyzes and gather calculating, breaks into paper spare by computer peripheral equipment 2 (typewriter) again.Certainly, the present invention also can not establish computer peripheral equipment 2, and directly reads measurement data from the fluorescent screen of computing machine 1, and notes with pen and paper, and calculates.
One of embodiments of the invention are to see also accompanying drawing 1.With the power≤100KW of tested engine 13, towing astern power≤45KW, rotational speed regulation scope 200～4000r/min, speed stabilizing rate≤0.5%F.S are example.It can select YVP-225S-2 type ac variable frequency speed regulation motor 3 for use, and power draw is 45KW.Select VS-61665 variable-frequence governor 4 for use by the not tape speed sensor vector control of day intrinsic safety river company production.Select for use Beijing three brilliant modern science and technology group to produce, have and measure torque and rotating speed function, model is JN338-C intelligence shaft coupling 5 (moment of torsion 500Nm, rotating speed 0～5000r/min), and the torque/speed/power measurement instruments 6 supporting with it.Cooling water temperature and oil temperature monitor 7 all adopt XMZ-101A type digital display meter, and sensor is pt100.Shaft coupling 11 nylon rope flexible coupling is joined CW160 current vortex dynamometer 10 and controller 9 thereof that Luoyang Nan Fengchang produces.And computing machine 1 is selected 386 computing machines for use.Engine fuel cutter 8 adopts DJT24-1030 to shut down electromagnet.And chilled water and machine oil auxiliary heater 16 adopt the ceramic electrical heater element.With above-described various device, instrument and meter, mix electrical power control cabinet 2, and press accompanying drawing 1 combination and connect lead and power lead, promptly form the present invention.If add the computer application software of working out according to measurand and measurement requirement thereof, can drop into and measure and the test running.
Two of the embodiment of the invention is to see also accompanying drawing 2.31N water brake and the water valve actuator supporting that detent 9 adopts Yi Ke company of Zhejiang University to produce with it.The Pt100 sensor is adopted in the measurement of cooling water temperature and oil temperature.The cut-out of engine fuel adopts DJT24-1030 to shut down electromagnet.The control of engine throttle, the TDTM type throttle actuator that adopts Yi Ke company of Zhejiang University to produce.And the application software of computing machine 1 should comprise contents such as data acquisition, operating mode control and data processing.Other is all as one of embodiment.
The technical indicator system that its technical scheme of the invention process is reached has at least two schemes available, and the one, be used for the A scheme of the following single cylinder engine of 25KW, the 2nd, be used for the B scheme of the following Multi-Cylinder Diesel Engine of 100KW.Its key technical indexes content is as follows respectively:
Technical indicator A option b scheme
Towing astern power 7.5/11Kw 45Kw
The range of speeds 300～3000r/min 400～4000r/min
Steady speed precision ± 0.5%F.S ± 0.5%F.S
Rate accuracy ± 1r/min ± 1r/min
Torque range 0～100Nm 0～500Nm
Survey square precision ± 0.5%F.S ± 0.5%F.S
0～150 ℃ 0～150 ℃ of temperature-measuring range
Temperature measurement accuracy ± 1 ℃ ± 1 ℃
Torque sensor is selected 200Nm 500Nm for use
The present invention can select relevant various instrument and meters and equipment for use according to above listed technical indicator in the enforcement of its technical scheme, reach its technical indicator to guarantee the present invention.
In sum, compared with the prior art the present invention has following characteristics:
1, power draw big (＞30KW), speed-regulating range width (300-4000r/min), adjusting speed accuracy height (± 0.5%F.S), fast response time.
2, waterpower or the multiple brake such as current vortex or magnetic or dynamometer machine can be adopted respectively, both effective power can be surveyed, Can survey mechanical loss power and mechanical efficiency again.
3, employing realizes the noncontact transmission of bridge mains and signal with the shaft coupling of measurement function. Have the precision height, Frequency response is fast, high reliability, and the life-span is long, is easy to install, and it is the shortest axially to connect distance, and the advantage such as do not need repeatedly to return to zero.
4, by cooling water and oil temperature observing and controlling, guaranteed the measurement of effective power and mechanical loss power, not only turned to Speed is identical, and the ambient temperature parameter of catch fire operating mode and towing astern operating mode is also identical. The machinery of measuring with motoring breakdown like this Wasted power, just very approaching with mechanical loss power actual under the operating mode of catching fire.
5, the measurement of effective power and mechanical loss power all is to adopt same shaft coupling and torque with measurement function / rotating speed/power measurement instruments has been eliminated in the prior art, adopts two kinds of measuring instruments to measure the error of bringing.
6, whole system is coordinated by the computer unified command, has realized regulating working conditions, data acquisition process, catches fire and has fallen Drag the automation of switching. Guaranteed the realization of quick this index of response.
7, the ratio of performance to price height of system is easy to make and install.
The present invention is owing to its certainty of measurement height, and repeatability is again fine, so it is Engine Industry development, develops, changes Advance one of important means of product, it is of many uses. Its main application has the following aspects at least:
1, in order to measure the mechanical loss of engine, tries to achieve the mechanical efficiency of engine.
2, in order to the Combustion tester coupling, it is close to make engine towing astern indicator card, pressure build-up rate figure, pressure probability Degree distribution maps etc. are in order to carry out thermodynamic analysis.
3, with the method for disassembling, can measure the mechanical loss power of each annex of engine.
4, close wear test in order to rubbing of engine.
5, in order to engine lubrication oil quality and anti-friction agent performance test.
6, in order to inspect the faults such as piston, piston ring and bearing.
7, by experiment, use the power that should have in the hope of starting-motor of engine.
8, in order to torque, rotating speed and the power etc. of the various power transmission machineries such as prototype gear case.
Research when 9, the towing astern test is not limited to the rotating speed change, and can be used for combustion motors such as compression ratio, eddy current Strengthen and the impact of main performance index, and to the research of the profound levels such as impact of local Transient Heat Transfer.
Realize the technical scheme of the object of the invention, except above two kinds of given best-of-breed technology schemes, it at least also There are 4 kinds, please join and read accompanying drawing 3,4,5,6.
The corresponding title of Fig. 3-label shown in Figure 6 is: 1 is computer, and 2 is computer peripheral equipment, and 3 is AC frequency conversion Buncher, 4 is variable-frequency governor, and 5 is torque/speed sensor (intelligence coupling), and 6 is torque/speed/merit The rate measuring instrument, 7 is cooling water temperature and oil temperature monitor, and 8 is the engine fuel cutter, and 9 are braking/survey The merit device, 10 are braking/measurement of power controller, and 11 is shaft coupling, and 12 is electrical power control cabinet, and 13 is tested engine, 14 Survey instrument for torsion, rotating speed, power, 15 is the ac variable frequency speed regulation motor of pendulum type balance structure, and 16 is cooling water and machine The oil auxiliary heater.
Claims (10)
1, a kind of measurement of engine mechanical efficiency and back drawing test system, it is characterized in that, include computing machine (1), ac variable frequency speed regulation motor (3), variable-frequence governor (4), intelligence shaft coupling (5), torque/speed/power measurement instruments (6), cooling water temperature and oil temperature monitor (7), engine fuel cutter (8), detent/dynamometer (9), braking/measurement of power controller (10), shaft coupling (11) and electrical power control cabinet (12) etc. are formed, said ac variable frequency speed regulation motor (3), be electrically connected by lead (3-1) and variable-frequence governor (4), and variable-frequence governor (4) is by interface and lead (4-1), be connected with computing machine (1) communication, said detent/dynamometer (9), be electrically connected by lead (9-10) and braking/measurement of power controller (10), and brake/measurement of power controller (10) is connected with computing machine (1) communication with lead (10-1) by interface, said intelligent shaft coupling (5), be electrically connected by lead (5-6) and torque/speed/power measurement instruments (6), and torque/speed/power measurement instruments (6) is connected with computing machine (1) communication with lead (6-1) by interface, said engine fuel cutter (8), be connected with computing machine (1) communication with lead (8-1) by interface, said cooling water temperature and oil temperature monitor (7), be connected with computing machine (1) communication with lead (7-1) by interface, said ac variable frequency speed regulation motor (3), by shaft coupling (11), being axle between the two with detent/dynamometer (9) links, and said detent/dynamometer (9) and intelligent shaft coupling (5), being axle between the two links, and said electrical power control cabinet (12), then by lead respectively with computing machine (1), ac variable frequency speed regulation motor (3), variable-frequence governor (4), intelligence shaft coupling (5), torque/speed/power measurement instruments (6), cooling water temperature and oil temperature monitor (7), engine fuel cutter (8), detent/dynamometer (9), braking/measurement of power controller (10) is and is electrically connected.
2, a kind of measurement of engine mechanical efficiency and back drawing test system, it is characterized in that, include computing machine (1), ac variable frequency speed regulation motor (3), variable-frequence governor (4), intelligence shaft coupling (5), detent (9), shaft coupling (11), electrical power control cabinets (12) etc. are formed, and said ac variable frequency speed regulation motor (3), be electrically connected by lead (3-4) and variable-frequence governor (4), and variable-frequence governor (4) is connected with computing machine (1) communication with lead (4-1) by interface, and detent (9) is connected with computing machine (1) telecommunication by interface and lead (9-1), intelligence shaft coupling (5) is by interface and lead (5-1), be connected with computing machine (1) telecommunication, electrical power control cabinet (12) is then respectively by lead and computing machine (1), ac variable frequency speed regulation motor (3), variable-frequence governor (4), intelligent shaft coupling (5), detent (9) etc. is electrically connected.
3, as claim 1 and 2 described measurement of engine mechanical efficiency and back drawing test systems, it is characterized in that, said ac variable frequency speed regulation motor (1), it is common asynchronous moter, or ac variable frequency speed regulation asynchronous machine, or Alternating Current Shaft-driven Motor, or ac synchronous motor, or commutatorless machine.
As claim 1 and 2 described measurement of engine mechanical efficiency and back drawing test systems, it is characterized in that 4, said variable-frequence governor (4) is general variable-frequence governor, or do not have the reversing motor variable-frequence governor.
As claim 1 and 2 described measurement of engine mechanical efficiency and back drawing test systems, it is characterized in that 5, said shaft coupling (11) is a flexible coupling, or spring coupling, or Hooks coupling universal coupling.
6, as claim 1 and 2 described measurement of engine mechanical efficiency and back drawing test systems, it is characterized in that, it also has chilled water and machine oil auxiliary heater (16), and said chilled water and machine oil auxiliary heater (16), be electrically connected by lead (12-16) and electrical power control cabinet (12), and be connected with computing machine (1) telecommunication with lead (1-16) by interface.
7, as claim 1 and 2 described measurement of engine mechanical efficiency and back drawing test systems, it is characterized in that, said detent/dynamometer (9), it is magnetic braking/dynamometer, or current vortex braking/dynamometer, or hydraulic brake/dynamometer, and said braking/measurement of power controller (10), then for respectively with magnetic braking/dynamometer, current vortex braking/dynamometer, the braking that hydraulic brake/dynamometer is tackled mutually/measurement of power controller.
8, measurement of engine mechanical efficiency as claimed in claim 1 and back drawing test system, it is characterized in that, the torque/speed sensor of said torque rotary speed power measurement instruments (6), all be non-contacting sensor, and its torque sensor is a rotation coupling strain gauge transducer, or magnetostriction type sensor, or phase difference sensor, and its speed probe is a magnetoelectric sensor, or electro-optical pickoff.
9, measurement of engine mechanical efficiency as claimed in claim 1 and back drawing test system, it is characterized in that, said engine fuel cutter (8), be by tractive magnet, and formed by electromagnet pulling engine governor shutdown handle, or the solenoid valve that is connected between injection pump of engine and the high pressure fuel injector pipe is formed.
10, measurement of engine mechanical efficiency as claimed in claim 1 and back drawing test system is characterized in that, said cooling water temperature and oil temperature monitor (7) are the thermistor-type temperature monitors, or the sensor-type temperature monitor of semiconductor temperature-sensitive.
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| CN00133212A CN1119640C (en) | 2000-11-09 | 2000-11-09 | Measurement of engine mechanical efficiency and back drawing test system |
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| CN00133212A CN1119640C (en) | 2000-11-09 | 2000-11-09 | Measurement of engine mechanical efficiency and back drawing test system |
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| CN1119640C CN1119640C (en) | 2003-08-27 |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102162759A (en) * | 2010-12-29 | 2011-08-24 | 奇瑞汽车股份有限公司 | Method and system for testing torque of electric automobile |
| CN102628717A (en) * | 2012-04-20 | 2012-08-08 | 北京必创科技有限公司 | Strain type wireless sensor |
| CN102735382A (en) * | 2012-07-09 | 2012-10-17 | 中国石油大学(北京) | Energy efficiency test method and device of variable frequency oil pump unit |
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| CN103403517A (en) * | 2011-03-17 | 2013-11-20 | 丰田自动车株式会社 | Engine testing apparatus, and engine testing method |
| CN103481120A (en) * | 2013-08-23 | 2014-01-01 | 上海师范大学 | Intelligent detection system for Duty parameters of machine tool |
| CN104655343A (en) * | 2015-02-09 | 2015-05-27 | 北京理工大学 | High-precision measuring method for dynamic pushing force of micro initiating explosive actuated device |
| CN105258831A (en) * | 2015-11-20 | 2016-01-20 | 成都科瑞信科技有限责任公司 | Signal offset direct-current electric power dynamometer system on the basis of linear filtering processing |
| CN105277304A (en) * | 2015-11-20 | 2016-01-27 | 成都科瑞信科技有限责任公司 | Switch logic control direct current electric power dynamometer system on the basis of linear filtering processing |
| CN105300581A (en) * | 2015-11-20 | 2016-02-03 | 成都科瑞信科技有限责任公司 | DC electric power power-measuring system based on switch logic control circuit |
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| CN105333983A (en) * | 2015-11-20 | 2016-02-17 | 成都科瑞信科技有限责任公司 | Direct-current electricity power testing system based on signal bias processing |
| CN105466616A (en) * | 2015-11-20 | 2016-04-06 | 成都科瑞信科技有限责任公司 | DC electric dynamometering system based on voltage protection circuit |
| CN105466615A (en) * | 2015-11-20 | 2016-04-06 | 成都科瑞信科技有限责任公司 | DC electric power dynamometering system |
| CN105466617A (en) * | 2015-11-20 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Direct-current electrical dynamometer system based on linear filtering processing and voltage protection circuit |
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2000
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| CN102162759A (en) * | 2010-12-29 | 2011-08-24 | 奇瑞汽车股份有限公司 | Method and system for testing torque of electric automobile |
| CN102162759B (en) * | 2010-12-29 | 2014-07-30 | 奇瑞汽车股份有限公司 | Method and system for testing torque of electric automobile |
| CN103403517A (en) * | 2011-03-17 | 2013-11-20 | 丰田自动车株式会社 | Engine testing apparatus, and engine testing method |
| CN103403517B (en) * | 2011-03-17 | 2016-05-11 | 丰田自动车株式会社 | Engine test plant and engine test method |
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| CN102735382A (en) * | 2012-07-09 | 2012-10-17 | 中国石油大学(北京) | Energy efficiency test method and device of variable frequency oil pump unit |
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| CN104655343B (en) * | 2015-02-09 | 2017-04-26 | 北京理工大学 | High-precision measuring method for dynamic pushing force of micro initiating explosive actuated device |
| CN105300582A (en) * | 2015-11-20 | 2016-02-03 | 成都科瑞信科技有限责任公司 | DC electric power power-measuring system based on signal linear filtering processing |
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| CN105466616A (en) * | 2015-11-20 | 2016-04-06 | 成都科瑞信科技有限责任公司 | DC electric dynamometering system based on voltage protection circuit |
| CN105466615A (en) * | 2015-11-20 | 2016-04-06 | 成都科瑞信科技有限责任公司 | DC electric power dynamometering system |
| CN105466617A (en) * | 2015-11-20 | 2016-04-06 | 成都科瑞信科技有限责任公司 | Direct-current electrical dynamometer system based on linear filtering processing and voltage protection circuit |
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| CN105300581A (en) * | 2015-11-20 | 2016-02-03 | 成都科瑞信科技有限责任公司 | DC electric power power-measuring system based on switch logic control circuit |
| CN105845017A (en) * | 2016-06-15 | 2016-08-10 | 上海海事大学 | Ship host trailing method through motor and ship host trailing system thereof |
| CN107389338A (en) * | 2017-06-26 | 2017-11-24 | 西安航空制动科技有限公司 | A kind of Inspection Aircraft Wheels accelerated life test moment of resistance loading device |
| CN107860581A (en) * | 2017-09-25 | 2018-03-30 | 南京航空航天大学 | A kind of vibration integrated testing stand of modular engine rotor unbalance |
| CN107884199A (en) * | 2017-12-01 | 2018-04-06 | 西华大学 | A kind of single-cylinder engine platform experiment system and its control method for carrying towing astern function |
| CN107884199B (en) * | 2017-12-01 | 2023-08-29 | 西华大学 | Single-cylinder engine bench experiment system with reverse towing function and control method thereof |
| CN112734146A (en) * | 2019-10-28 | 2021-04-30 | 广州汽车集团股份有限公司 | Method for calculating efficiency of automobile transmission, computer equipment and storage medium |
| CN114812895A (en) * | 2022-04-14 | 2022-07-29 | 浙江飞碟汽车制造有限公司 | Test method and test bench for testing efficiency of P2 framework hybrid power assembly |
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