CN202329995U - Experiment table for measuring characteristics of mechanical supercharger - Google Patents
Experiment table for measuring characteristics of mechanical supercharger Download PDFInfo
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- CN202329995U CN202329995U CN2011204435979U CN201120443597U CN202329995U CN 202329995 U CN202329995 U CN 202329995U CN 2011204435979 U CN2011204435979 U CN 2011204435979U CN 201120443597 U CN201120443597 U CN 201120443597U CN 202329995 U CN202329995 U CN 202329995U
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Abstract
The utility model discloses an experiment table for measuring the characteristics of a mechanical supercharger. The experiment table comprises an electromotor, an additional shaft No.1, a torque revolution speed sensor, an additional shaft No.2, a plastic ball valve, a torductor and a computer. The electromotor with a belt wheel No.1, the torque revolution speed sensor in linear connection with the torductor and the mechanical supercharger with an air outlet pipe and an air inlet pipe are sequentially mounted on an experiment table rack in a manner that the revolution axes are parallel to each other. The additional shaft No.1 with a belt wheel No.2 and the additional shaft No.2 with a belt wheel No.3 are mounted on the two sides of the torque revolution speed sensor and connected through a coupling. A belt No.1 is connected with the belt wheel No.1 and the belt wheel No.2; and a belt No.2 is connected with the belt wheel No.3 and the mechanical supercharger belt wheel. A temperature sensor No.1 and a pressure sensor No.1 are mounted on the air inlet pipe with an air flowmeter at an inlet; and a temperature sensor No.2 and a pressure sensor No.2 are mounted on the air outlet pipe with the plastic ball valve at the tail end. The temperature and pressure sensors are connected with the air flowmeter and the computer.
Description
Technical field
The utility model relates to a kind of experiment table of automotive field, and or rather, the utility model is a kind of experimental testing station of measuring engine mechanical supercharger characteristic.
Background technology
Engine booster has become and has improved HP, hp/litre, realized the technical measures that the engine lightweight is indispensable.Existing engine booster technology generally has engine driven supercharging and exhaust gas turbocharge, and the utility model is a kind of experiment test platform that designs for mechanical supercharger specially.The essence of engine driven supercharging is positive displacement rotor air compressor, and is the same with other positive displacement compressor, and it also is to realize a kind of fluid machinery of compressing through the volume that changes gas.The primary structure of mechanical supercharger comprises: drive pulley, synchronous transmission gear, housing, active and driven rotor etc.That mechanical supercharger has is simple in structure, volume is little, in light weight, vibration is little, cost is low, advantage such as reliable, on the engine booster of medium and small discharge capacity, the irreplaceable advantage of other supercharger is arranged.Mechanical supercharger is directly installed on the engine belt pulley end, directly drives through bent axle, can gas be compressed before getting into cylinder in advance, improves air inflow, thereby promotes the power per liter of engine.But also there is a matching problem in mechanical supercharger with being connected of engine; Be that what kind of velocity range mechanical supercharger is operated in and just can makes most effective; That is to say that engine is under the situation of different rotating speeds; Mechanical supercharger should just can make the coupling of engine and mechanical supercharger reach best by corresponding respectively what kind of rotating speed, and implementation efficiency is the highest, is very crucial so obtain the family curve of mechanical supercharger to the coupling between mechanical supercharger and the engine.Given this, this design for Experimental Platform theory is exactly for the accurate family curve of measurement mechanical supercharger a kind of experiment test platform to be provided, for mechanical supercharger coupling engine provides a reliable basis.
The family curve manufacturer of mechanical supercharger generally seldom provides, and is used for the device of special measurement mechanical supercharger and few at present.So do not knowing under the characteristic situation of mechanical supercharger the difficulty that the coupling of mechanical supercharger and engine just becomes.
Summary of the invention
The utility model technical matters to be solved is to have overcome the problem that prior art exists, and a kind of experiment table of measuring engine mechanical supercharger characteristic is provided.
For solving the problems of the technologies described above, the utility model is to adopt following technical scheme to realize: the experiment table of described measurement mechanical supercharger characteristic comprises frequency converter, motor, No. 1 belt pulley, No. 1 belt, No. 2 belt pulleys, No. 1 additional shaft, torque speed sensor, No. 3 belt pulleys, No. 2 belts, No. 2 additional shafts, No. 1 temperature sensor, No. 1 pressure transducer, draft tube, air flowmeter, No. 2 temperature sensors, No. 2 pressure transducers, escape pipe, ball valve made of plastic, torductor and computing machines.
Motor, torque speed sensor and tested mechanical supercharger are installed on the workplace of experimental stand with bolt; Torque speed sensor is positioned at the centre position of motor and tested mechanical supercharger, and the axis of rotation of motor, torque speed sensor and tested mechanical supercharger is parallel to each other.No. 2 additional shafts are installed on the experimental stand in torque speed sensor left side through two structures identical No. 2 bearings and bearing seat; The right-hand member of No. 2 additional shafts is connected with the left end of torque speed sensor through No. 2 shaft couplings, and the left end of No. 2 additional shafts is installed with belt pulley No. 3.No. 1 additional shaft is installed on the experimental stand of torque speed sensor right-hand member through two structures identical No. 1 bearing and bearing seat; The left end of No. 1 additional shaft is connected with the right-hand member of torque speed sensor through No. 1 shaft coupling; The right-hand member of No. 1 additional shaft is installed with belt pulley No. 2, and the axis of rotation of No. 2 additional shafts, torque speed sensor and No. 1 additional shafts is on same horizontal line.No. 1 belt pulley is installed on the output shaft of motor, and No. 1 belt connects No. 1 belt pulley and No. 2 belt pulleys, the mechanical supercharger belt wheel on No. 2 No. 3 belt pulleys of belt connection and the tested mechanical supercharger input shaft.Frequency converter is connected with the motor electric wire, and torductor is connected with the torque speed sensor electric wire.No. 1 temperature sensor and No. 1 pressure transducer are installed on the draft tube of tested mechanical supercharger; Air flowmeter is installed in the inlet of draft tube; No. 2 temperature sensors and No. 2 pressure transducers are installed on the escape pipe of tested mechanical supercharger, and ball valve made of plastic is installed in the end of escape pipe.No. 1 temperature sensor, No. 1 pressure transducer, No. 2 temperature sensors, No. 2 pressure transducers are connected with the computing machine electric wire with air flowmeter.
Compared with prior art the beneficial effect of the utility model is:
1. the family curve that the experiment table of the described measurement mechanical supercharger of the utility model characteristic can the measurement mechanical supercharger is for mechanical supercharger coupling engine provides reliable basis;
2. the experiment table of the described measurement mechanical supercharger of the utility model characteristic provides a kind of simple and practical method for the family curve that obtains mechanical supercharger;
3. the experiment table measuring speed of the described measurement mechanical supercharger of the utility model characteristic is fast, fiduciary level is high, easy to operate, and the family curve of measuring multiple mechanical supercharger can be provided;
4. the experiment table of the described measurement mechanical supercharger of the utility model characteristic is simple in structure, is easy to build;
5. the adjusting ball valve aperture of the experiment table of the described measurement mechanical supercharger of the utility model characteristic can be simulated the different engine of suction press, has strengthened the application of the utility model.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is the schematic block diagram that the structure of the experiment table of the described measurement mechanical supercharger of the utility model characteristic is formed;
Fig. 2 is No. 1 additional shaft and the structure of No. 2 additional shafts and the synoptic diagram of installation that is adopted in the experiment table of the described measurement mechanical supercharger of the utility model characteristic;
Among the figure: 1. frequency converter, 2. motor, No. 3.1 belt pulleys, No. 4.1 belts, No. 5.2 belt pulleys; 6.1 number additional shaft, No. 7.1 bearings and bearing seat, No. 8.1 shaft couplings, 9. torque speed sensor, No. 10.2 shaft couplings; 11.2 number bearing and bearing seat, No. 12.3 belt pulleys, No. 13.2 belts, No. 14.2 additional shafts, 15. mechanical superchargers; 16.1 number temperature sensor, No. 17.1 pressure transducers, 18. draft tube, 19. air flowmeter, No. 20.2 temperature sensors; 21.2 number pressure transducer, 22. escape pipes, 23. ball valve made of plastic, 24. torductors, 25. computing machines.
Embodiment
Below in conjunction with accompanying drawing the utility model is explained in detail:
The experiment table of the described measurement mechanical supercharger of the utility model characteristic comprises frequency converter 1; Motor 2; No. 1 belt pulley 3; No. 1 belt 4; No. 2 belt pulleys 5; No. 1 additional shaft 6; No. 1 bearing and bearing seat 7; No. 1 shaft coupling 8; Torque speed sensor 9; No. 2 shaft couplings 10; No. 2 bearings and bearing seat 11; No. 3 belt pulleys 12; No. 2 belts 13; No. 2 additional shafts 14; No. 1 temperature sensor 16; No. 1 pressure transducer 17; Draft tube 18; Air flowmeter 19; No. 2 temperature sensors 20; No. 2 pressure transducers 21; Escape pipe 22; Ball valve made of plastic 23; Torductor 24 and computing machine 25.
1. the experiment table that described motor 2 is mainly whole measurement mechanical supercharger characteristic provides the power of running; Required power and moment of torsion gets final product in the time of satisfying mechanical supercharger and reach maximum speed, and adopting rated power among the utility model embodiment is that 30KW and rated speed are three asynchronous motors of 2950r/min.
2. the little range of described torque speed sensor 9 general employings; Tested mechanical supercharger running moment of torsion is also little, and institute thinks improves the little range of measuring accuracy torque speed sensor 9 general employings, and what adopted among the utility model embodiment is the torque speed sensor of NJ1G type; Nominal torque 50Nm; Rotating speed 0-20000r/min allowable, as long as range satisfies the measurement range of tested mechanical supercharger 15, and selected range is more little accurate more.
3. described torductor 24 is used to show the rotating speed of torque speed sensor 9 measured values and torque speed sensor 9; Adopting model among the utility model embodiment is the torductor of NC-3, model be NC-3 torductor 24 can with the torque speed sensor 9 supporting uses of the magneto-electric phase differential type of various ranges.
4. the effect of described frequency converter 1 in the experiment table of the described measurement mechanical supercharger of the utility model characteristic is 2 rotations of control motor; And the rotating speed of adjusting motor 2; The frequency converter 1 that is adopted among the utility model embodiment is three frequency converters; Be that model is the frequency converter of VFD300F43A, working voltage is 380V, the motor of suitable power 30kW.
5. described No. 1 shaft coupling 8 is used to connect the left end of No. 1 additional shaft 6 and the right-hand member of torque speed sensor 9; The diameter of bore of No. 1 shaft coupling 8 is identical with the diameter of torque speed sensor 9 input shafts, adopts aluminium alloy quincunx shaft coupling among the utility model embodiment, endoporus 26mm; External diameter 55mm; Length 78mm, can oneself processing or customized, as long as satisfy the diameter dimension of torque speed sensor axle and additional shaft.
6. described No. 2 shaft couplings 10 are used to connect the right-hand member of No. 2 additional shafts 14 and the left end of torque speed sensor 9, and the diameter of bore of No. 2 shaft couplings 10 is identical with the diameter of torque speed sensor 9 output shafts, and No. 2 shaft coupling 10 is identical with No. 1 shaft coupling 8 structures.
7. described No. 1 additional shaft 6 is installed on No. 1 identical bearing 7 of two structures to being rotationally connected, and the right-hand member of No. 1 additional shaft 6 is equipped with No. 2 belt pulleys 5 for being fixedly connected, and the left end of No. 1 additional shaft 6 is fixedly connected with the right-hand member of No. 1 shaft coupling 8.
8. described No. 2 additional shafts 14 are installed on No. 2 identical bearings 11 of two structures to being rotationally connected; The left end of No. 2 additional shafts 14 is equipped with No. 3 belt pulleys 12 for being fixedly connected; The right-hand member of No. 2 additional shafts 14 is fixedly connected with the left end of No. 2 shaft couplings 10, and the structure of No. 2 additional shafts 14 is identical with the structure of No. 1 additional shaft 6.
9. No. 1 bearing 7 that described two structures are identical is used to support additional shaft 6 No. 1, and preventing influences the measuring accuracy of torque speed sensor 9 because being stretching on the torque speed sensor 9 of belt produces moment of flexure.
10. No. 2 bearings 11 that described two structures are identical are used to support additional shaft 14 No. 2, and preventing influences the measuring accuracy of torque speed sensor 9 because being stretching on the torque speed sensor 9 of belt produces moment of flexure.The structure of No. 1 bearing 7 that the structure of No. 2 bearings 11 that two structures are identical is identical with two structures is identical.
The purpose that No. 1 identical bearing 7 of 6, No. 2 additional shafts of No. 1 additional shaft 14, two structures No. 2 bearings 11 identical with two structures are installed is to guarantee that torque speed sensor 9 does not bear moment of flexure; Because do not adopt duplex bearing supported structure; The tensile force of belt brings very big additional bending moment for the axle of torque speed sensor 9, can influence measuring accuracy like this.So duplex bearing supported structure is installed at the two ends of torque speed sensor 9, be used to offset the moment of flexure that belt tension brings, make 9 of torque speed sensors bear moment of torsion, guarantee measuring accuracy.
11. described No. 1 belt 4 is used to connect No. 1 belt pulley 3 and No. 2 belt pulleys 5, gives No. 1 additional shaft 6 with the transmission of power of motor 2, and then passes to torque speed sensor 9.No. 1 belt 4 can adopt the V-type band; Also can adopt polywedge bet; The kind of band can be confirmed according to the structure of No. 2 belt pulleys 5 on No. 1 belt pulley on motor 2 output shafts 3 and torque speed sensor 9 input ends; Length determines that by distance between the two what adopted among the utility model embodiment is 3 V-type bands.
12. described No. 2 belts 13 are used to connect the mechanical supercharger belt wheel on No. 3 belt pulleys 12 and tested mechanical supercharger 15 input shafts, give tested mechanical supercharger 15 with the transmission of power of motor 2.The length of No. 2 belts 13 is determined that by distance between the two model is confirmed according to the type of the mechanical supercharger belt wheel on tested mechanical supercharger 15 input shafts.Mechanical supercharger belt wheel on tested mechanical supercharger 15 input shafts is generally the polywedge bet wheel, so No. 2 belts 13 are generally selected polywedge bet for use, No. 3 belt pulley 12 is also made the polywedge bet wheel.
13. described No. 1 belt pulley 3 is installed on the output shaft of motor 2; The internal diameter of No. 1 belt pulley 3 center pits is confirmed according to the diameter of motor 2 output shafts; The diameter of No. 1 belt pulley 3 can guarantee that the ratio of gear of No. 1 belt pulley 3 and No. 2 belt pulleys 5 is to get final product at 3: 1, can make 200～300mm.
14. described No. 2 belt pulleys 5 are installed in the right-hand member of No. 1 additional shaft 6; Equipped with No. 1 belt 4; The internal diameter of No. 2 belt pulley 5 center pits and the equal diameters of attaching the right-hand member of No. 1 additional shaft 6; The diameter of No. 1 belt pulley 3 and No. 2 belt pulleys 5 can guarantee that both ratio of gear are to get final product at 3: 1, and No. 2 belt pulley 5 can be made 60-100mm.
15. described No. 3 belt pulleys 12 are installed in the left end of No. 2 additional shafts 14; Through No. 2 belts 13 with the transmission of power of motor 2 input shaft to tested mechanical supercharger 15; The internal diameter of No. 3 belt pulleys 12 is according to the equal diameters of No. 2 additional shaft 14 left ends; The diameter of No. 3 belt pulleys 12 can guarantee that the ratio of gear of the mechanical supercharger belt wheel on No. 3 belt pulleys 12 and tested mechanical supercharger 15 input shafts is to get final product at 2: 1, and it is the same with the type of mechanical supercharger belt wheel that the type of No. 3 belt pulleys 12 need be made.
16. described No. 1 temperature sensor 16 is used to measure intake air temperature; Be installed on the draft tube 18; Adopting the model of thermojunction type among the embodiment of the experiment table of the described measurement mechanical supercharger of the utility model characteristic is No. 1 temperature sensor 16 of TK60,0～350 ° of range.Adopt the temperature sensor of 0～100 ° of range to get final product in the utility model.
17. described No. 2 temperature sensors 20 are used to measure delivery temperature; Be installed on the escape pipe 22; Adopting the model of thermojunction type among the embodiment of the experiment table of the described measurement mechanical supercharger of the utility model characteristic is No. 2 temperature sensors 20 of TK60, and range is 0～350 °.No. 2 temperature sensor 20 is identical with the model of No. 1 temperature sensor 16.Adopt the temperature sensor of 0～200 ° of range to get final product in the utility model.
18. described No. 1 pressure transducer 17 is used for the inlet gas pressure of measurement mechanical supercharger 15; Be installed on the draft tube 18; The range of No. 1 pressure transducer 17 is 0～200kPa; Adopting model among the embodiment of the experiment table of the described measurement mechanical supercharger of the utility model characteristic is the diffusion silicon pressure sensor of GX-T21X, and its range is 0～200kPa.
19. described No. 2 pressure transducers 21 are used for the exit gas pressure of measurement mechanical supercharger 15; Be installed on the escape pipe 22; The range of No. 2 pressure transducers 21 is 0-250kPa; Adopting model among the embodiment of the experiment table of the described measurement mechanical supercharger of the utility model characteristic is the diffusion silicon pressure sensor of GX-T21X, and its range is 0～250kPa.
20. described ball valve made of plastic 23 is installed in the end of escape pipe 22, is used to adjust gas port pressure.The interface diameter of ball valve made of plastic 23 is identical with the diameter of escape pipe 22.
21. described air flowmeter 19 is used to measure charge flow rate; Be installed in the inlet of draft tube 18; Adopting model among the embodiment of the experiment table of the described measurement mechanical supercharger of the utility model characteristic is the air flowmeter 19 of BOSCH0280218132, and in fact air flowmeter is as long as satisfy the range of 0～400kg/h.
22. described computing machine 25 is a common computer; Computing machine 25 is connected with air flowmeter 19 electric wires through 17, No. 2 pressure transducers 21 of data collecting card and 20, No. 1 pressure transducer of 16, No. 2 temperature sensors of No. 1 temperature sensor; Computing machine 25 is accepted the voltage signal of 17, No. 2 pressure transducers of 20, No. 1 pressure transducer of 16, No. 2 temperature sensors of No. 1 temperature sensor 21 and air flowmeter 19 collections, and computing machine 25 is output as data-signal (demonstration measured value) through LabView software with the voltage signal of gathering.
23. described draft tube 18 is installed in the import of tested mechanical supercharger 15; The diameter of draft tube 18 is identical with the diameter of mechanical supercharger 15 imports, and No. 1 pressure transducer 17, No. 1 temperature sensor 16 of measuring intake air temperature and the air flowmeter 19 of measuring charge flow rate of measuring admission pressure are installed above the draft tube 18.
24. described escape pipe 22 is installed in the outlet of tested mechanical supercharger 15; The diameter of escape pipe 22 is identical with the diameter of mechanical supercharger 15 outlets, and No. 2 pressure transducers 21 measuring mouth pressure, No. 2 temperature sensors 20 and the ball valve made of plastic 23 of measuring outlet temperature are installed above the escape pipe 22.
Consult Fig. 1 and Fig. 2, Fig. 1 has represented that the experiment table structure of the described measurement mechanical supercharger of the utility model characteristic is formed and parts installation site relation.Wherein motor 2, torque speed sensor 9, tested mechanical supercharger 15 usefulness bolt are installed at grade; Promptly be fixedly mounted on the workplace of experimental stand; Torque speed sensor 9 is installed in the centre position of motor 2 and tested mechanical supercharger 15, and guarantees that motor 2, torque speed sensor 9 and the axis of rotation of tested mechanical supercharger 15 are parallel to each other.On the workplace of the experimental stand that No. 2 additional shafts 14 are installed in torque speed sensor 9 left sides through identical No. 2 bearings of two structures and bearing seat 11; The right-hand member of No. 2 additional shafts 14 is connected with the left end of torque speed sensor 9 through No. 2 shaft couplings 10, and the left end of No. 2 additional shafts 14 is installed with belt pulley 12 No. 3.On the workplace of the experimental stand that No. 1 additional shaft 6 is installed in torque speed sensor 9 right-hand members through identical No. 1 bearing of two structures and bearing seat 7; The left end of No. 1 additional shaft 6 is connected with the right-hand member of torque speed sensor 9 through No. 1 shaft coupling 8, and the right-hand member of No. 1 additional shaft 6 is installed with belt pulley 5 No. 2.The axis of rotation of No. 2 additional shafts 14, torque speed sensor 9 and No. 1 additional shafts 6 is on same horizontal line.No. 1 belt pulley 3 is installed on the output shaft of motor 2, and the right side of the right side of No. 1 belt pulley 3 and No. 2 belt pulleys 5 is in the same vertical plane, and No. 1 belt 4 is used to connect No. 1 belt pulley 3 and No. 2 belt pulleys 5.On mechanical supercharger 15 input shafts mechanical supercharger belt pulley is installed; The left side of mechanical supercharger belt pulley is in the same vertical plane with the left side of No. 3 belt pulleys 12 of No. 2 additional shaft 14 left ends of fixed installation, and No. 2 belts 13 are used to connect the mechanical supercharger belt wheel on No. 3 belt pulleys 12 and tested mechanical supercharger 15 input shafts.Frequency converter 1 is connected with power cable, and frequency converter 1 is connected with motor 2 electric wires.Torductor 24 is connected with torque speed sensor 9 electric wires, and torductor 24 is used to show the numerical value of torque speed sensor 9.Draft tube 18 is installed in respectively on the air intake opening and gas outlet of tested mechanical supercharger 15 with escape pipe 22, and sealing and fixing.Two through holes are set on the draft tube 18; I.e. No. 1 temperature sensor through hole and No. 1 pressure transducer through hole; These two through holes are near the import of mechanical supercharger 15; Be the aspect sensor installation certain angle that can suitably stagger, the order that No. 1 temperature sensor 16 and 17, No. 1 temperature sensor through holes of No. 1 pressure transducer and No. 1 pressure transducer through hole are installed does not respectively require.Air flowmeter 19 is installed to the inlet of draft tube 18.On escape pipe 22, two through holes are set equally near mechanical supercharger 15 outlets; I.e. No. 2 temperature sensor through holes and No. 2 pressure transducer through holes; The order that No. 2 temperature sensors 20 and 21, No. 2 temperature sensor through holes of No. 2 pressure transducers and No. 2 pressure transducer through holes are installed does not require equally.Ball valve made of plastic 23 is installed to the end of escape pipe 22.20, No. 2 pressure transducers 21 of 17, No. 2 temperature sensors of 16, No. 1 pressure transducer of No. 1 temperature sensor are connected with computing machine 25 through signal wire with air flowmeter 19, on the display screen of computing machine 25, show measurement result.
The principle of work of the experiment table of measurement mechanical supercharger characteristic:
The purpose of the experiment table of the described measurement mechanical supercharger of the utility model characteristic is the family curve of measurement mechanical supercharger 15, and characterizing mechanical supercharger 15 characteristic mainly is three curves: the mechanical supercharger flow with the wasted work of the change curve of mechanical supercharger speed, mechanical supercharger with the isentropic efficiency of the change curve of mechanical supercharger speed, mechanical supercharger itself with the change in rotational speed relation curve.
Think the family curve of measurement mechanical supercharger, used motor 2 provides power for whole experiment test platform, drives mechanical supercharger 15 and torque speed sensor 9 rotations.Used frequency converter 1 is used to control the rotational speed of motor 2, and the used frequency converter 1 of this experiment porch can be adjusted to 3000r/min (also can be set at other incremental speed) from 60r/min with the every separated 60r/min of motor 2 rotating speeds through setting.3, No. 2 belt pulleys 5 of used No. 1 belt pulley and No. 3 belt pulleys 12 are used for the end rotating speed of elevating gear supercharger 15; According to the maximum speed of motor 2 with the maximum speed of the mechanical supercharger 15 that will measure confirm ratio of gear; Mechanical supercharger 15 maximum speeds that this experiment porch will be measured are 15000r/min; Motor 2 maximum speeds are 300r/min; So the belt wheel overall ratio of setting is 6: 1; Wherein the ratio of gear of No. 2 belt pulleys 5 of No. 1 belt pulley 3 of motor 2 output terminals and torque speed sensor 9 right-hand members is set at 3: 1, and No. 3 belt pulleys 12 of torque speed sensor 9 left ends and the ratio of gear of the mechanical supercharger belt wheel on mechanical supercharger 15 input shafts are set at 2: 1.Torque speed sensor 9 is used for the merit that 15 rotations of measurement mechanical supercharger are consumed with torductor 24, and wherein torque speed sensor 9 is a measurement component, and torductor 24 is a display unit.Duplex bearing supported structure is adopted at torque speed sensor 9 two ends, and effect is to prevent that torque speed sensor from producing moment of flexure, influences measuring accuracy.Used air flowmeter 19 is used to measure the air capacity that gets into mechanical supercharger 15.The terminal used ball valve made of plastic 23 in gas outlet is used to simulate back pressure; Because mechanical supercharger 15 is installed on the engine; The gas outlet can be because the resistance of continuous opening and closing of inlet valve and air inlet produce back pressure, think and more approach reality, add a ball valve; Can simulate mechanical supercharger 15 working conditions under the different back pressures, thereby make the characteristic measurement of mechanical supercharger more accurate.Computing machine 25 is equipped with data processing switching software LabView, can the voltage signal of out temperature sensor and pressure transducer and air-flow measurement be converted into data output.
1. the mechanical supercharger flow is with the variation relation curved measurement of mechanical supercharger speed: through the rotating speed of motor, calculate the rotating speed of mechanical supercharger according to ratio of gear; Through air flowmeter displayed value on computers, obtain the charge flow rate of the current rotating speed of mechanical supercharger; Writing down under each mechanical supercharger rotating speed the flow of corresponding mechanical supercharger, is the X axle with the mechanical supercharger rotating speed, is the Y axle with the airflow value of mechanical supercharger, can obtain the mechanical supercharger flow with the change in rotational speed relation curve.
2. the wasted work of mechanical supercharger is with the variation relation curved measurement of mechanical supercharger speed: through the rotating speed of motor 2, calculate the rotating speed of mechanical supercharger 15 according to ratio of gear; Numerical value through torductor 24 shows obtains power consumption value corresponding under the current mechanical supercharger rotating speed; Writing down under each mechanical supercharger rotating speed corresponding power consumption, is the X axle with the mechanical supercharger rotating speed, is the Y axle with the power consumption of mechanical supercharger, can obtain the mechanical supercharger wasted work with the change in rotational speed relation curve.
3. the isentropic efficiency of mechanical supercharger own is measured with the change in rotational speed relation curve: what isentropic efficiency characterized is the work efficiency of mechanical supercharger itself.The mechanical supercharger isentropic efficiency here is the isentropic efficiency according to second law of thermodynamics calculating machine supercharger, and corresponding computing formula is following:
The isentropic efficiency of η mechanical supercharger, T
1The mechanical supercharger intake air temperature, P
1The mechanical supercharger admission pressure, T
2The mechanical supercharger air outlet temperature, P
2Mechanical supercharger goes out atmospheric pressure, and κ is the air ratio ratio of specific heat, general κ=1.4.So the isentropic efficiency of calculating machine supercharger itself needs intake air temperature and pressure, air outlet temperature and pressure.Temperature sensor A has measured the mechanical supercharger intake air temperature, and pressure transducer A has measured the mechanical supercharger admission pressure, and temperature sensor B has measured the mechanical supercharger air outlet temperature, and pressure transducer B has measured mechanical supercharger gas outlet pressure.Write down the computer displayed value of these corresponding 4 sensors of each rotating speed, just can calculate the isentropic efficiency of mechanical supercharger.
Explain: the power that torque gauge shows is that the moment of torsion that bears of torque speed sensor itself and the revolution speed calculating of torque speed sensor are come; Also differ from the transmission efficiency of a belt with the power of mechanical supercharger itself; Institute thinks that to make data more accurate, and can belt pulley C and the ratio R of the radius of mechanical supercharger belt pulley: r calculates the moment of torsion that mechanical supercharger bears
T wherein
TqBe the moment of torsion that is born on the mechanical supercharger, r is a mechanical supercharger belt wheel radius, and R is a belt pulley C radius, T
cMoment of torsion for torque speed sensor itself.Known the moment of torsion of mechanical supercharger; Add the rotation speed n of the mechanical supercharger that the rotating speed according to ratio of gear and motor obtains, can obtain the power consumption of mechanical supercharger itself according to formula
.
The operating process of the experiment table of measurement mechanical supercharger characteristic
1. experimental stand is built and is finished, and the mechanical supercharger 15 that will measure is fixed on the experimental stand on request.
2. connect motor 2, computing machine 25, air flowmeter 19 power supplys, when measuring the mechanical supercharger 15 of charged magnet clutch, also need connect electromagnetic clutch power.
3. regulate ball valve made of plastic 23 apertures, begin to measure from maximum opening earlier.
4. regulate frequency converter 1, motor 2 be increased to maximum and record by low speed by the increment of setting, can obtain the velocity amplitude of one group of mechanical supercharger 15, by low speed to high speed.
5. when record is regulated frequency converter 1 each time, the intake air temperature that shows on the computing machine 25 and pressure, air outlet temperature and pressure, airflow value.Can obtain one group of intake air temperature pressure, air outlet temperature pressure and airflow value under mechanical supercharger 15 different rotating speeds.
6. when record is regulated frequency converter 1 each time, the rotating speed, power and the torque value that show on the torque speed sensor 9.
7. dwindle ball valve made of plastic 23 apertures, repeating step 4,5,6 obtains the corresponding data value of aperture of different ball valve made of plastic 23.
8. repeat above step, measure and accomplish several groups of corresponding rotating speed, power consumption and each the sensor displayed value of reserving in advance of different ball valve made of plastic 23 apertures.
9. measure and accomplish powered-down.
Data preparation and family curve obtain
Experiment finishes and can obtain power consumption, out temperature and inlet and outlet pressure, the airflow value under the corresponding different mechanical supercharger rotating speeds of one group of different ball valve aperture.
Under same ball valve aperture, be the X axle with the mechanical supercharger rotating speed, concern with change in rotational speed for the Y axle can obtain the mechanical supercharger air mass flow with the air mass flow.With the mechanical supercharger is the X axle, is the Y axle with the supercharger power consumption, can obtain the mechanical supercharger power consumption and concern with change in rotational speed.According to mechanical supercharger intake air temperature and pressure, air outlet temperature and the force value of record, utilize above-mentioned formula
to calculate the corresponding mechanical supercharger isentropic efficiency η of each rotating speed respectively; With the engine driven supercharging rotating speed is the X axle, and efficient concerns with change in rotational speed for the Y axle can obtain the mechanical supercharger isentropic efficiency.
Calculate the mechanical supercharger family curve under the different ball valve apertures by same method.By near the ball valve aperture of engine charge pressure corresponding supercharger family curve and Engine Matching.
Coupling with engine
The mechanical supercharger characteristic curve value that obtains through said method is more reliable, for mechanical supercharger provides foundation with the coupling of engine.
Claims (1)
1. the experiment table of a measurement mechanical supercharger characteristic; It is characterized in that the experiment table of described measurement mechanical supercharger characteristic comprises frequency converter (1), motor (2), No. 1 belt pulley (3), No. 1 belt (4), No. 2 belt pulleys (5), No. 1 additional shaft (6), torque speed sensor (9), No. 3 belt pulleys (12), No. 2 belts (13), No. 2 additional shafts (14), No. 1 temperature sensor (16), No. 1 pressure transducer (17), draft tube (18), air flowmeter (19), No. 2 temperature sensors (20), No. 2 pressure transducers (21), escape pipe (22), ball valve made of plastic (23), torductor (24) and computing machine (25);
Motor (2), torque speed sensor (9) are installed on the workplace of experimental stand with tested mechanical supercharger (15) with bolt; Torque speed sensor (9) is positioned at the centre position of motor (2) and tested mechanical supercharger (15); Motor (2), torque speed sensor (9) are parallel to each other with the axis of rotation of tested mechanical supercharger (15); No. 2 additional shafts (14) are installed on the experimental stand in torque speed sensor (9) left side through two structures identical No. 2 bearings and bearing seat (11); The right-hand member of No. 2 additional shafts (14) is connected with the left end of torque speed sensor (9) through No. 2 shaft couplings; The left end of No. 2 additional shafts (14) is installed with No. 3 belt pulleys (12); No. 1 additional shaft (6) is installed on the experimental stand of torque speed sensor (9) right-hand member through two structures identical No. 1 bearing and bearing seat (7); The left end of No. 1 additional shaft (6) is connected with the right-hand member of torque speed sensor (9) through No. 1 shaft coupling; The right-hand member of No. 1 additional shaft (6) is installed with No. 2 belt pulleys (5); The axis of rotation of No. 2 additional shafts (14), torque speed sensor (9) and No. 1 additional shaft (6) is on same horizontal line, and No. 1 belt pulley (3) is installed on the output shaft of motor (2), and No. 1 belt (4) connects No. 1 belt pulley (3) and No. 2 belt pulleys (5); No. 2 belts (13) connect the mechanical supercharger belt wheel on No. 3 belt pulleys (12) and tested mechanical supercharger (15) input shaft; Frequency converter (1) is connected with motor (2) electric wire, and torductor (24) is connected with torque speed sensor (9) electric wire, and No. 1 temperature sensor (16) is installed on the draft tube (18) of tested mechanical supercharger (15) with No. 1 pressure transducer (17); Air flowmeter (19) is installed in the inlet of draft tube (18); No. 2 temperature sensors (20) are installed on the escape pipe (22) of tested mechanical supercharger (15) with No. 2 pressure transducers (21), and ball valve made of plastic (23) is installed in the end of escape pipe (22), and No. 1 temperature sensor (16), No. 1 pressure transducer (17), No. 2 temperature sensors (20), No. 2 pressure transducers (21) are connected with computing machine (25) electric wire with air flowmeter (19).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204435979U CN202329995U (en) | 2011-11-10 | 2011-11-10 | Experiment table for measuring characteristics of mechanical supercharger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204435979U CN202329995U (en) | 2011-11-10 | 2011-11-10 | Experiment table for measuring characteristics of mechanical supercharger |
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| CN202329995U true CN202329995U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204435979U Expired - Fee Related CN202329995U (en) | 2011-11-10 | 2011-11-10 | Experiment table for measuring characteristics of mechanical supercharger |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424348A (en) * | 2015-12-14 | 2016-03-23 | 中国北方发动机研究所(天津) | Adaptive tensioning supercharger test device |
| CN106353023A (en) * | 2016-09-26 | 2017-01-25 | 苏州朗高电机有限公司 | Torque sensor protection device |
| CN106370412A (en) * | 2016-10-08 | 2017-02-01 | 中国地质大学（北京） | Turbine test bed |
| CN111487049A (en) * | 2020-04-23 | 2020-08-04 | 吉林大学 | Comprehensive test bed for mechanical supercharging air inlet system |
-
2011
- 2011-11-10 CN CN2011204435979U patent/CN202329995U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424348A (en) * | 2015-12-14 | 2016-03-23 | 中国北方发动机研究所(天津) | Adaptive tensioning supercharger test device |
| CN106353023A (en) * | 2016-09-26 | 2017-01-25 | 苏州朗高电机有限公司 | Torque sensor protection device |
| CN106370412A (en) * | 2016-10-08 | 2017-02-01 | 中国地质大学（北京） | Turbine test bed |
| CN106370412B (en) * | 2016-10-08 | 2019-02-01 | 中国地质大学（北京） | A kind of turbine test rig |
| CN111487049A (en) * | 2020-04-23 | 2020-08-04 | 吉林大学 | Comprehensive test bed for mechanical supercharging air inlet system |
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Granted publication date: 20120711 Termination date: 20121110 |