CN108051225B - Internal combustion engine reciprocating oscillation heat transfer simulation test device and test method thereof - Google Patents
Internal combustion engine reciprocating oscillation heat transfer simulation test device and test method thereof Download PDFInfo
- Publication number
- CN108051225B CN108051225B CN201711023449.XA CN201711023449A CN108051225B CN 108051225 B CN108051225 B CN 108051225B CN 201711023449 A CN201711023449 A CN 201711023449A CN 108051225 B CN108051225 B CN 108051225B
- Authority
- CN
- China
- Prior art keywords
- oil
- test piece
- cooling
- cavity
- connecting rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
Abstract
The invention relates to a reciprocating oscillation heat transfer simulation test device and a test method thereof for an internal combustion engine, belonging to the technical field of piston tests of the internal combustion engine. The device comprises a main body oscillating mechanism, a power system, an oil supply and residual oil collecting system, a control and measurement system and a piston heating system, wherein the main body oscillating mechanism comprises a rack, a crank length adjusting device and the like; the power system comprises a servo motor device; the oil supply system sprays engine oil to the oil duct transparent model through an oil nozzle aligned with an inner cooling oil cavity cooling piston test piece inlet, and the residual oil collection system finally collects the engine oil; the control and measurement system measures and controls the rotating speed, the oil injection pressure and the like of the servo motor device; the piston heating system realizes constant temperature heating of the internal cooling oil cavity cooling piston test piece through a resistance wire. The invention has high simulation precision and strong universality, directly inspects the heat exchange coefficient of the wall surface of the oil cavity by measuring the temperature of the inlet and the outlet of the engine oil, and simultaneously can measure the performance of the oil nozzle, thereby providing a basis for the optimal design of the piston.
Description
Technical Field
The invention relates to a reciprocating oscillation heat transfer simulation test device and a test method thereof for an internal combustion engine, belonging to the technical field of piston tests of the internal combustion engine.
Background
With the increasing of explosion pressure and power per liter in the cylinder of the diesel engine in recent years, the thermal load and the mechanical load of the piston of the diesel engine are greatly increased. In order to prevent the piston from failing and ensure the reliability and durability of the piston and the diesel engine, the maximum temperature of the piston must be controlled below an allowable value, and thus the piston needs to be effectively cooled. The cooling mode widely applied to the high-load piston at present is forced oscillation cooling of an internal cooling oil passage.
The forced oscillation cooling of the inner cooling oil duct is that the oil duct is cast in the inner side of the piston ring area, engine oil is sprayed to an engine oil inlet of the oil duct through an engine oil nozzle, and the engine oil enters the oil duct and then violently oscillates under the high-speed reciprocating motion of a piston and finally flows out of an oil duct outlet. Most of heat of the piston can be taken away by the engine oil in the oscillating process of the internal cooling oil channel, and the temperature of the piston is greatly reduced. In the research of the inner cooling oil duct, the earlier method is to evaluate the heat exchange performance of the inner cooling oil duct through a piston temperature field, and a satisfactory result cannot be obtained due to the limitation of the accuracy of boundary conditions.
At present, researches on forced oscillation cooling of an internal cooling oil duct mainly comprise oil duct flowing heat exchange simulation and research on an internal cooling oil duct oscillation flowing simulation test device. The simulation calculation of the flowing heat exchange of the oil duct simulates a simplified oil duct model, the accuracy of the model is difficult to guarantee, and experimental verification is needed. Examples of the development of the oscillatory flow heat transfer simulation test device include: an engine piston oscillation cooling experimental device is disclosed in Chinese patent application 201010547315. X. A research piston test piece is fixed on a long piston, an engine crank connecting rod mechanism and the long piston are driven to move through a motor, the piston is heated through high-temperature gas, and finally the cooling effect of an oil cavity is evaluated through the temperature of outlet engine oil.
But the device has the advantages that the crank radius cannot be adjusted, and the universality is low; more importantly, the device can only indirectly evaluate the heat exchange effect of the oil cavity by using the temperature of the outlet engine oil, and cannot directly investigate the oscillation heat exchange condition of the cold oil cavity in the piston, namely cannot evaluate the cooling effect through the heat exchange coefficient of the wall surface oil cavity.
Disclosure of Invention
The invention aims to solve the technical problem of providing a reciprocating oscillation heat transfer simulation test device and a test method thereof for an internal combustion engine, which can directly inspect the oscillation heat exchange condition (namely heat exchange coefficient) by measuring the temperature of a piston measuring point and the temperature of an engine oil inlet and an engine oil outlet, and can accurately measure the engine oil passing rate of an inner cooling oil duct, thereby providing a basis for researching the flowing heat exchange of the inner cooling oil duct and the design of the inner cooling oil duct of the piston.
The technical scheme adopted by the invention is as follows: a reciprocating oscillation heat transfer simulation test device for an internal combustion engine comprises a main body oscillation mechanism, a power system, an oil supply and residual oil collection system, a control and measurement system and a piston heating system; wherein:
the main body oscillation mechanism comprises a frame 1, a crank length adjusting device 2, a mandril guide mechanism, a connecting rod 13, a variable crank connecting rod mechanism 14, a mandril 11, a test piece mounting platform 10, an internal cooling oil cavity cooling piston test piece 9 and a right main journal 16;
mounting holes are formed in the left side, the right side and the upper portion of the rack 1, a crank length adjusting device 2 penetrates through the mounting hole in the left side of the rack 1 and then is connected with the left side of a variable crank link mechanism 14 in the rack 1, a right main journal 16 penetrates through the mounting hole in the right side of the rack 1 and then is connected with the right side of the variable crank link mechanism 14, the right main journal 16 is axially fixed by the rack 1, a mandril guide mechanism is arranged at the mounting hole in the upper portion of the rack 1, a test piece mounting platform 10 is fixed right above the rack 1, the upper end of a mandril 11 is connected with the test piece mounting platform 10, the lower end of the mandril guide mechanism penetrates through the lower end and then is connected with the upper end of a connecting rod 13 in the rack 1, the lower end of the connecting rod 13 is connected with; the cooling piston test piece 9 with the inner cooling oil cavity is arranged at the upper part of the test piece mounting platform 10 and is provided with an oil inlet and an oil outlet;
the power system comprises a servo motor device 15, a motor output shaft 29 of the servo motor device 15 is connected with a right main journal 16, the servo motor device 15 drives a variable crank connecting rod mechanism 14 to reciprocate through the right main journal 16, and then the variable crank connecting rod mechanism 14 drives a connecting rod 13 to reciprocate up and down;
the oil supply and residual oil collecting system comprises an oil supply device and a residual oil collecting device 12, wherein the oil supply device is used for spraying engine oil to an oil inlet of the internal cooling oil cavity cooling piston test piece 9, and the residual oil collecting device 12 is used for collecting the engine oil flowing out of an oil outlet of the internal cooling oil cavity cooling piston test piece 9 and the engine oil sprayed out of the oil supply device but not sprayed into the oil inlet of the internal cooling oil cavity cooling piston test piece 9;
the control and measurement system comprises an upper computer and a lower computer, wherein the upper computer is connected with the lower computer and used for transmitting instructions to the lower computer, and the lower computer is connected with the oil supply device and the servo motor device 15 and used for controlling the oil supply device and the servo motor device 15 to execute the instructions of the upper computer and feeding back the state data of the oil supply device and the servo motor device 15 to the upper computer;
the piston heating system comprises a heating control box, an insulation box 8, a resistance wire and a wire, wherein the resistance wire is installed in the insulation box 8 and is connected with the heating control box through the wire, an inner-cooling oil cavity cooling piston test piece 9 is installed in the insulation box 8 and is internally provided with a temperature sensor, one end of the temperature sensor inside the inner-cooling oil cavity cooling piston test piece 9 is connected with the heating control box, the other end of the temperature sensor is connected with a temperature data recorder, temperature sensors for measuring the temperatures of an oil inlet and an oil outlet of the inner-cooling oil cavity cooling piston test piece 9 are respectively installed in an oil supply device and a residual oil collecting device 12, the temperature sensors in the oil supply device and the residual oil collecting device 12 are directly connected with the temperature data recorder, after the heating control box is electrified, the insulation box 8 is heated through the resistance wire, the inner-cooling oil cavity cooling piston test piece 9 is further heated, and when the temperature sensor inside the inner- When the temperature exceeds the set temperature, the heating control box automatically cuts off the power of the lead, so that the internal cooling oil cavity cooling piston test piece 9 is stabilized within the set temperature range.
The crank length adjusting device 2 comprises a hand wheel 24, a sliding screw 25, a nut 26, a bearing 22, a sleeve 21, a thrust retainer ring or a double-nut fixed standard part 23; the sleeve 21 is installed in a mounting hole on the left side of the frame 1, the bearing 22 is installed inside the sleeve 21, the nut 26 is installed on an inner ring of the bearing 22 and is axially fixed, the thrust retaining ring or the double-nut fixing standard part 23 is fixed on the nut 26, the sliding screw 25 is in threaded connection with the inner wall of the nut 26, the left end of the sliding screw 25 is connected with the hand wheel 24, the right end of the sliding screw 25 is connected with the left end of the variable crank-link mechanism 14, and the axial position of the sliding screw 25 is changed by rotating the hand wheel 24, so that the variable crank-link.
The variable crank-link mechanism 14 comprises a left crank 20, a link journal 19 and a right crank 18, the left end of the left crank 20 is connected with the crank length adjusting device 2, the right end of the left crank 20 is connected with the left end of the link journal 19, the right end of the link journal 19 is connected with the left end of the right crank 18, the right end of the right crank 18 is connected with the right main journal 16, the middle part of the link journal 19 is connected with a link 13 above, the ejector rod guide mechanism comprises an ejector rod sleeve 27 and an ejector rod sleeve seat 28, the ejector rod sleeve seat 28 is positioned at the mounting hole on the upper part of the frame 1, the ejector rod sleeve 27 is mounted inside the ejector rod sleeve seat 28, the lower end of the ejector rod 11 passes through the ejector rod sleeve 27 and then extends into the frame 1, the ejector rod 11 freely slides in the ejector rod sleeve 27, the lower end of the ejector rod 11 is provided with a connecting lug, the connecting lug is provided with a pin hole, the upper end of the link 13 is, the connecting rod 13 is rotatably connected with the ejector rod 11 through a pin penetrating through a pin hole on the connecting lug and a pin hole on the small end of the connecting rod, and the large end of the connecting rod 13 is rotatably connected with the middle part of a connecting rod journal 19 at the lower end.
The variable crank link mechanism 14 further comprises vibration balance devices 17 at the left end and the right end, the left end of the vibration balance device 17 at the left end is connected with the crank length adjusting device 2, the right end of the vibration balance device 17 at the left end is connected with the left end of the left crank 20, the left end of the vibration balance device 17 at the right end is connected with the right end of the right crank 18, and the right end of the vibration balance device 17 at the right end is connected with the right main journal 16.
The oil supply device comprises an oil storage tank 3, a high-pressure oil pump 4, an oil pump motor 5, a pressure accumulator 6 and an oil nozzle 7, wherein the high-pressure oil pump 4 is respectively connected with the oil storage tank 3, the oil pump motor 5 and the pressure accumulator 6, the pressure accumulator 6 is connected with the oil nozzle 7, and the oil nozzle 7 is adjusted by an oil nozzle position adjusting device to be aligned with an oil inlet of a cooling piston test piece 9 of the inner cooling oil cavity.
The cooling piston test piece 9 with the inner cooling oil cavity is the upper half part of a piston with the inner cooling oil cavity, a plurality of temperature sensors connected with a heating control box are arranged in the cooling piston test piece 9 with the inner cooling oil cavity, and when the temperature detected by any temperature sensor in the cooling piston test piece 9 with the inner cooling oil cavity exceeds a set value, the heating control box automatically cuts off the power of a lead.
The temperature sensors in the cooling oil cavity cooling piston test piece 9 comprise a left temperature sensor 41, a top temperature sensor 42, a right temperature sensor 43 and a bottom temperature sensor 44, and the four temperature sensors respectively measure the temperature of the corresponding positions in the cooling oil cavity cooling piston test piece 9.
The residual oil collecting device 12 comprises an upper jacket box 30, a lower jacket box 31, a cavity 32, an oil outlet collecting pipe 33, an un-sprayed oil collecting pipe 34, an oil spraying way 35 and a ventilation window 37, wherein the upper jacket box 30 is fixed with the upper test piece mounting platform 10, the inlet of the upper jacket box 30 is communicated with the oil outlet of the inner cooling oil cavity cooling piston test piece 9, the lower jacket box 31 is positioned at the lower end of the upper jacket box 30 and is in clearance fit with the upper jacket box 30, the lower jacket box 31 contains a middle baffle plate 38, the cavity 32 with the ventilation window 37 is arranged at the outer side of the lower jacket box 31, a middle baffle plate 36 is arranged in the middle of the cavity, the ventilation window 37 is communicated with the atmosphere, the middle baffle plate 38 divides the lower jacket box 31 into a left box body and a right box body, the engine oil flowing out from the oil outlet of the inner cooling oil cavity cooling piston test piece 9 flows through the upper jacket box 30 and then enters the left box body of the lower jacket box 31, the engine oil sprayed from the oil, the oil-out collecting pipe 33 is communicated with the left cavity of the cavity 32, and the non-injected oil collecting pipe 34 is communicated with the right cavity of the cavity 32.
The cross section of the middle baffle 38 is in a crank shape.
A test method of a reciprocating oscillation heat transfer simulation test device of an internal combustion engine comprises the following steps:
the method comprises the following steps: manufacturing a simplified connecting rod 13 according to the length of the connecting rod of the researched machine type, and rotationally connecting the connecting rod 13 with a connecting rod journal 19; then the length of the simulated crank is adjusted to the length of the actual model crank by rotating the hand wheel 24; the connecting rod 13 is rotatably connected with the ejector rod 11; after installation, the variable crank link mechanism 14 is kept at the bottom dead center position; the ejector rod 11 is connected with the frame 1 in a sliding way through an ejector rod guide mechanism, and the perpendicularity of the ejector rod 11 is ensured by the ejector rod guide mechanism;
step two: a left temperature sensor 41, a top temperature sensor 42, a right temperature sensor 43 and a bottom temperature sensor 44 are installed on the internal cooling oil cavity cooling piston test piece 9, temperature sensors for measuring the temperatures of an oil inlet and an oil outlet of the internal cooling oil cavity cooling piston test piece 9 are installed in the oil supply device and the residual oil collecting device 12, then the internal cooling oil cavity cooling piston test piece 9 is fixed on the test piece installation platform 10 through bolts, the position of the oil nozzle 7 is adjusted to enable the oil nozzle to be opposite to the oil inlet of the internal cooling oil cavity cooling piston test piece 9, and a heat insulation box 8 and a resistance wire are installed;
step three: starting an oil pump motor 5, starting an oil injection nozzle electromagnetic valve after the pressure of a pressure accumulator 6 reaches an experimental value and is constant, injecting high-pressure engine oil into an oil inlet of an internal cooling oil cavity cooling piston test piece 9 by an oil injection nozzle 7, and observing the oil injection condition when the internal cooling oil cavity cooling piston test piece 9 is still at a lower dead point;
step four: the upper computer sends out a command, the lower computer controls the servo motor device 15 to start, so that the variable crank connecting rod mechanism 14 stably runs at a certain rotating speed, and the connecting rod 13 and the ejector rod 11 drive the test piece mounting platform 10 and the cooling piston test piece 9 with the internal cooling oil cavity above the test piece mounting platform to reciprocate according to a given rule;
step five: the switch of the heating control box is turned on, the resistance wire is electrified, the cooling piston test piece 9 of the inner cooling oil cavity in the heat insulation box 8 is heated, and the temperature of the cooling piston test piece 9 of the inner cooling oil cavity is stabilized at 200 +/-3
Within the range of degrees;
step six: after 30 seconds, the movement of engine oil in the internal cooling oil cavity cooling piston test piece 9 is changed stably and periodically, and a temperature data recorder records the temperature of each test point on the internal cooling oil cavity cooling piston test piece 9 and the temperature of an oil inlet and an oil outlet of the internal cooling oil cavity cooling piston test piece 9;
step seven: after 5 minutes, the observation and recording are finished, the heating control box is closed firstly, and then oil injection is stopped and the switch of the servo motor device 15 is closed; the upper computer analyzes the collected data and calculates to obtain the average heat exchange coefficient of the wall surface of the oil cavity of the cooling piston test piece 9 of the internal cooling oil cavity;
step eight: the oil injection temperature in the oil supply system, the oil injection pressure of the high-pressure oil pump 4 and the rotating speed of the servo motor device 15 are changed through the control and measurement system, and experimental data under different working conditions are obtained through experiments.
The principle of the design of the invention is as follows: the variable crank-link mechanism 14 is driven by the servo motor device 15 to drive the ejector rod 11 to do up-and-down reciprocating motion under the restraint of the guide mechanism of the frame 1, and the internal cooling oil cavity cooling piston test piece 9 is fixed above the test piece mounting platform 10, so that the variable crank-link mechanism 14 is separated from a test piece (the internal cooling oil cavity cooling piston test piece 9), an oil duct engine oil collecting device can be conveniently arranged, and the variable crank-link mechanism 14 is conveniently driven to be lubricated; the stepless adjustment of the axial position of the sliding screw 25 is realized through sliding screw transmission; the piston heating system heats the internal cooling oil cavity cooling piston test piece 9 at a constant temperature, the temperature inside the internal cooling oil cavity cooling piston test piece 9 and the temperature of an oil inlet and an oil outlet are measured according to a temperature sensor, and the average heat exchange coefficient of the wall surface of the oil cavity is obtained by applying a thermodynamic formula.
Compared with the prior art, the invention has the following advantages:
1. the variable crank-link mechanism 14 is separated from a test piece (an internal cooling oil cavity cooling piston test piece 9) by the sliding of the ejector rod 11 under the restraint of the frame guide mechanism to enable the piston to move upwards and horizontally move; the residual oil collecting device 12 with the ventilation window 37 is arranged below the divided cooling piston test piece 9 with the internal cooling oil cavity, so that engine oil flowing out of the oil outlet of the cooling piston test piece 9 with the internal cooling oil cavity and engine oil sprayed out of the oil supply device but not sprayed into the oil inlet of the cooling piston test piece 9 with the internal cooling oil cavity can be collected, the ventilation window 37 is communicated with the atmosphere, the internal pressure of the residual oil collecting device 12 is close to the atmospheric pressure and is consistent with the actual internal environment of a crankcase, and the influence of higher internal pressure of other engine oil collecting devices on oil outlet of the oil channel is avoided; meanwhile, the lower part of the frame is closed, so that the splash lubrication is facilitated through a crankshaft or an oil thrower.
2. The length of the crank can be adjusted in a stepless way within a certain range by the spiral adjusting device comprising the crank shaft and the crank length which are connected in a rotating way at the 4 positions, so that the experimental device has stronger universality.
3. By measuring the temperature of a measuring point inside the cooling piston test piece 9 with the internal cooling oil cavity and the temperature of an engine oil inlet and an engine oil outlet, the heat exchange condition, namely the heat exchange coefficient, of the wall surface of the internal cooling oil cavity of the piston can be directly inspected.
4. The dynamic balance problem of the whole rack is considered, the vibration balance device 17 is introduced, vibration caused by unbalanced inertia force is greatly reduced by arranging balance blocks, and the service life of each part and the observation precision are improved.
Drawings
FIG. 1 is a schematic diagram of the general structure of the present invention
FIG. 2 is a top view of the main body oscillating mechanism of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
fig. 4 is a schematic structural view of the appearance of the residual oil collecting device 12;
fig. 5 is a plan view of the residual oil collecting device 12;
FIG. 6 is a schematic view of the cross-sectional structure A-A of FIG. 5;
fig. 7 is a front view of the residual oil collecting device 12;
FIG. 8 is a schematic view of the cross-sectional structure B-B in FIG. 7;
fig. 9 is a schematic structural diagram of the internal cooling oil cavity cooling piston test piece 9.
The reference numbers in the figures are: 1. a frame; 2. a crank length adjusting device; 3. an oil storage tank; 4. a high-pressure oil pump; 5. an oil pump motor; 6. an accumulator; 7. an oil jet; 8. a heat preservation box; 9. the internal cooling oil cavity cools the piston test piece; 10. a test piece mounting platform; 11. a top rod; 12. a residual oil collecting device; 13. a connecting rod; 14. a variable crank link mechanism; 15. a servo motor device; 16. a right main journal; 17. a vibration balancing device; 18. a right crank; 19. a connecting rod journal; 20. a left crank; 21. a sleeve; 22. a bearing; 23. the standard component is fixed by the thrust retaining ring or the double nuts; 24. a hand wheel; 25. a sliding screw; 26. a nut; 27. a jack rod sleeve; 28. a jack rod sleeve seat; 29. an output shaft of the motor; 30. putting a jacket box; 31. a lower sleeve box; 32. a cavity; 33. an oil outlet collecting pipe; 34. the oil collecting pipe is not sprayed; 35. an oil injection oil way; 36. a middle partition plate; 37. a ventilation window; 38. an intermediate baffle; 39. a left side square hole; 40. a right square hole; 41. a left side temperature sensor; 42. a top temperature sensor; 43. a right side temperature sensor; 44. a bottom temperature sensor; 45. and (4) bolts.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Example 1: as shown in fig. 1-9, a reciprocating oscillation heat transfer simulation test device for an internal combustion engine comprises a main body oscillation mechanism, a power system, an oil supply and residual oil collection system, a control and measurement system and a piston heating system; wherein:
the main body oscillation mechanism comprises a frame 1, a crank length adjusting device 2, a mandril guide mechanism, a connecting rod 13, a variable crank connecting rod mechanism 14, a mandril 11, a test piece mounting platform 10, an internal cooling oil cavity cooling piston test piece 9 and a right main journal 16;
mounting holes are formed in the left side, the right side and the upper portion of the rack 1, a crank length adjusting device 2 penetrates through the mounting hole in the left side of the rack 1 and then is connected with the left side of a variable crank link mechanism 14 in the rack 1, a right main journal 16 penetrates through the mounting hole in the right side of the rack 1 and then is connected with the right side of the variable crank link mechanism 14, the right main journal 16 is axially fixed by the rack 1, a mandril guide mechanism is arranged at the mounting hole in the upper portion of the rack 1, a test piece mounting platform 10 is fixed right above the rack 1, the upper end of a mandril 11 is connected with the test piece mounting platform 10, the lower end of the mandril guide mechanism penetrates through the lower end and then is connected with the upper end of a connecting rod 13 in the rack 1, the lower end of the connecting rod 13 is connected with; the cooling piston test piece 9 with the inner cooling oil cavity is arranged at the upper part of the test piece mounting platform 10 and is provided with an oil inlet and an oil outlet;
the power system comprises a servo motor device 15, a motor output shaft 29 of the servo motor device 15 is connected with a right main journal 16, the servo motor device 15 drives a variable crank connecting rod mechanism 14 to reciprocate through the right main journal 16, and then the variable crank connecting rod mechanism 14 drives a connecting rod 13 to reciprocate up and down;
the oil supply and residual oil collecting system comprises an oil supply device and a residual oil collecting device 12, wherein the oil supply device is used for spraying engine oil to an oil inlet of the internal cooling oil cavity cooling piston test piece 9, and the residual oil collecting device 12 is used for collecting the engine oil flowing out of an oil outlet of the internal cooling oil cavity cooling piston test piece 9 and the engine oil sprayed out of the oil supply device but not sprayed into the oil inlet of the internal cooling oil cavity cooling piston test piece 9;
the control and measurement system comprises an upper computer and a lower computer, wherein the upper computer is connected with the lower computer and used for transmitting instructions to the lower computer, and the lower computer is connected with the oil supply device and the servo motor device 15 and used for controlling the oil supply device and the servo motor device 15 to execute the instructions of the upper computer and feeding back the state data of the oil supply device and the servo motor device 15 to the upper computer; the control and measurement system takes an industrial personal computer as an upper computer and takes a PLC as a lower computer;
the piston heating system comprises a heating control box, an insulation box 8, a resistance wire and a wire, wherein the resistance wire is arranged in the insulation box 8 and is connected with the heating control box through the wire, an inner-cooling oil cavity cooling piston test piece 9 is arranged in the insulation box 8 and is internally provided with a temperature sensor, one end of the temperature sensor inside the inner-cooling oil cavity cooling piston test piece 9 is connected with the heating control box, the other end of the temperature sensor is connected with a temperature data recorder, temperature sensors for measuring the temperature of an oil inlet and an oil outlet of the inner-cooling oil cavity cooling piston test piece 9 are respectively arranged in an oil supply device and a residual oil collecting device 12, specifically, the temperature sensor for measuring the oil inlet of the inner-cooling oil cavity cooling piston test piece 9 is arranged in an accumulator 6, the temperature sensor for measuring the oil outlet of the inner-cooling oil cavity cooling piston test piece 9 is arranged at an upper jacket box, the temperature sensors in the oil supply device and the residual oil collecting device 12 are directly connected with a temperature data recorder, after the heating control box is electrified, the insulation can 8 is heated through the resistance wire, the cooling piston test piece 9 with the inner cooling oil cavity is further heated, and when the temperature sensor in the cooling piston test piece 9 with the inner cooling oil cavity detects that the temperature in the cooling piston test piece 9 with the inner cooling oil cavity exceeds the set temperature, the heating control box automatically cuts off the power of the lead, so that the cooling piston test piece 9 with the inner cooling oil cavity is stabilized within the set temperature range.
The crank length adjusting device 2 comprises a hand wheel 24, a sliding screw 25, a nut 26, a bearing 22, a sleeve 21, a thrust retainer ring or a double-nut fixed standard part 23; the sleeve 21 is installed in a mounting hole on the left side of the frame 1, the bearing 22 is installed inside the sleeve 21, the nut 26 is installed on an inner ring of the bearing 22 and is axially fixed, the thrust retaining ring or the double-nut fixing standard part 23 is fixed on the nut 26, the sliding screw 25 is in threaded connection with the inner wall of the nut 26, the left end of the sliding screw 25 is connected with the hand wheel 24, the right end of the sliding screw 25 is connected with the left end of the variable crank-link mechanism 14, and the axial position of the sliding screw 25 is changed by rotating the hand wheel 24, so that the variable crank-link. During operation, due to the self-locking function of the sliding screw 25 and the nut 26, the sliding screw 25 and the nut 26 rotate along with the variable crank link mechanism 14 as a whole; when the length of the crank needs to be adjusted, the nut 26 is fixed, the hand wheel 24 is rotated, the axial position of the sliding screw 25 is changed, and therefore the variable crank connecting rod mechanism 14 is pushed to move. The shank of the sliding screw 25 has a crank radius scale value for determining the radius of the crank in the current variable crank linkage 14. By turning the hand wheel 24, the axial position of the sliding screw 25 is changed, thereby pushing the variable crank mechanism 14 to move.
The variable crank connecting rod mechanism 14 comprises a left crank 20, a connecting rod journal 19 and a right crank 18, wherein the left end of the left crank 20 is connected with the crank length adjusting device 2, the right end of the left crank 20 is connected with the left end of the connecting rod journal 19, the right end of the connecting rod journal 19 is connected with the left end of the right crank 18, the right end of the right crank 18 is connected with the right main journal 16, the middle part of the connecting rod journal 19 is connected with the connecting rod 13 above, the ejector rod guide mechanism comprises an ejector rod sleeve 27 and an ejector rod sleeve seat 28, the ejector rod sleeve seat 28 is located at a mounting hole in the upper portion of the rack 1, the ejector rod sleeve 27 is mounted inside the ejector rod sleeve seat 28, the lower end of the ejector rod 11 penetrates through the ejector rod sleeve 27 and then extends into the rack 1, the ejector rod 11 freely slides in the ejector rod sleeve 27, the ejector rod 11 and the ejector rod sleeve 27 are made of alloy steel, and reasonable gaps are guaranteed through fine machining and matched grinding, the gaps are too large, oil leakage is easy to occur, and guiding is inaccurate; the clearance is too small, which is unfavorable for lubrication and easy to block. The lower end of the ejector rod 11 is provided with a connecting lug, the connecting lug is provided with a pin hole, the upper end of the connecting rod 13 is a connecting rod small end, the lower end of the connecting rod 13 is a connecting rod big end, the connecting rod small end is provided with a pin hole, a pin penetrates through the pin hole on the connecting lug and the pin hole on the connecting rod small end to enable the connecting rod 13 to be rotatably connected with the ejector rod 11, the connecting rod big end of the connecting rod 13 is rotatably connected with the middle part of a connecting rod journal 19 at the lower end, and as shown in fig. 3, the connecting rod journal 19 directly penetrates through. The restriction of the seat hole on the big end of the connecting rod 13 ensures that the central line of the connecting rod journal 19 is parallel to the central line of the right main journal 16, thereby realizing the correct piston motion law. The variable crank connecting rod mechanism 14 is rotationally connected with 4 positions at the crank throw, the crank length adjusting device 2 can adjust the axial position of one end of the crankshaft through screw transmission, and the other end of the crankshaft is axially fixed, so that the stepless adjustment of the crank length is realized; the lubrication is performed by partially immersing the crankshaft in an oil sump or by splash lubrication through an oil slinger attached to the crankshaft. The ejector rod 11 is rigidly connected with the test piece mounting platform 9 and the connecting lug at the lower end.
The variable crank link mechanism 14 further comprises vibration balance devices 17 at the left end and the right end, the left end of the vibration balance device 17 at the left end is connected with the crank length adjusting device 2, the right end of the vibration balance device 17 at the left end is connected with the left end of the left crank 20, the left end of the vibration balance device 17 at the right end is connected with the right end of the right crank 18, and the right end of the vibration balance device 17 at the right end is connected with the right main journal 16. The vibration balance device 17 comprises a disc fixed on the crankshafts of the left crank 20 and the right crank 18 and a balance weight fixed on the disc, and the mass and the arrangement position of the balance weight are determined by force calculation. The left vibration balance device 17, the left crank 20, the connecting rod journal 19, the right crank 18 and the right vibration balance device 17 are hinged with each other, so that the length change of the actual variable crank-connecting rod mechanism 14 can be realized when the hand wheel 24 is rotated. The unbalanced reciprocating inertia force and centrifugal inertia force are dynamically balanced by arranging a vibration balance device 17 at the opposite side of the crankshaft.
The oil supply device comprises an oil storage tank 3, a high-pressure oil pump 4, an oil pump motor 5, a pressure accumulator 6 and an oil nozzle 7, wherein the high-pressure oil pump 4 is respectively connected with the oil storage tank 3, the oil pump motor 5 and the pressure accumulator 6, the pressure accumulator 6 is connected with the oil nozzle 7, and the oil nozzle 7 is adjusted by an oil nozzle position adjusting device to be aligned with an oil inlet of a cooling piston test piece 9 of the inner cooling oil cavity.
The test piece 9 of the cooling piston with the inner cooling oil cavity is the upper half part of the piston with the inner cooling oil cavity and is fixed on the test piece mounting platform 10 through two bolts such as a bolt 45. A plurality of temperature sensors connected with a heating control box are arranged in the cooling piston test piece 9 with the inner cooling oil cavity, and when the temperature detected by the temperature sensor in any cooling piston test piece 9 with the inner cooling oil cavity exceeds a set value, the heating control box automatically cuts off the power of the lead.
As shown in fig. 9, the temperature sensors inside the cooling piston test piece 9 of the internal cooling oil chamber include a left temperature sensor 41, a top temperature sensor 42, a right temperature sensor 43, and a bottom temperature sensor 44, and the four temperature sensors respectively measure the temperature of the corresponding positions inside the cooling piston test piece 9 of the internal cooling oil chamber.
The residual oil collecting device 12 comprises an upper jacket box 30, a lower jacket box 31, a cavity 32, an oil outlet collecting pipe 33, an un-sprayed oil collecting pipe 34, an oil spraying way 35 and a ventilation window 37, wherein the upper jacket box 30 is fixed with the upper test piece mounting platform 10, the inlet of the upper jacket box 30 is communicated with the oil outlet of the inner cooling oil cavity cooling piston test piece 9, the lower jacket box 31 is positioned at the lower end of the upper jacket box 30 and is in clearance fit with the upper jacket box 30, the lower jacket box 31 contains a middle baffle plate 38, the cavity 32 with the ventilation window 37 is arranged at the outer side of the lower jacket box 31, a middle baffle plate 36 is arranged in the middle of the cavity, the ventilation window 37 is communicated with the atmosphere, the middle baffle plate 38 divides the lower jacket box 31 into a left box body and a right box body, the engine oil flowing out from the oil outlet of the inner cooling oil cavity cooling piston test piece 9 flows through the upper jacket box 30 and then enters the left box body of the lower jacket box 31, the engine oil sprayed from the oil, the oil-out collecting pipe 33 is communicated with the left cavity of the cavity 32, and the non-injected oil collecting pipe 34 is communicated with the right cavity of the cavity 32.
The engine oil flows and is supplied to the oil nozzle 7 from the oil injection oil path 35 and is sprayed out by aiming at the oil inlet of the cooling piston test piece 9 of the inner cooling oil cavity: the engine oil sprayed into the inner-cooling oil cavity cooling piston test piece 9 oscillates at a high speed along with the test piece, finally flows out of an oil outlet of the inner-cooling oil cavity cooling piston test piece 9, is collected by the upper sleeve box 30 and the lower sleeve box 31, enters the right side isolation space of the cavity 32 through the right side square hole 40, and finally flows to a metering container through the oil outlet collecting pipe 33; the engine oil which is sprayed out from the nozzle and is not sprayed into the internal cooling oil cavity to cool the piston test piece 9 directly passes through the upper sleeve 30 and the lower sleeve 31 to be collected, flows to the left isolated space of the cavity 32 through the left square hole 39 and is finally discharged through the non-sprayed oil collecting pipe 34. Because the top of the isolation space on the left side and the right side of the cavity 32 is provided with the ventilation windows 37 to communicate with the atmospheric pressure, the internal air pressure of the upper jacket box 30 and the lower jacket box 31 is close to the atmospheric pressure in the relative motion process, so that the air pressure of the oil inlet and the oil outlet of the cooling piston test piece 9 with the internal cooling oil cavity is close to the actual air pressure of the crankcase (close to the atmospheric pressure), and the problem that the oil outlet is influenced by the high pressure of the oil outlet in the.
The cross section of the middle baffle 38 is in a crank shape. Fig. 7 and 8 are a front view and a sectional view B-B of the residual oil collecting device 12: in order to avoid interference between the ejector rods 11 and the oil spray nozzle 7, the ejector rods are arranged as shown in fig. 9, the cross section of the intermediate baffle plate 38 is in a crank shape, and a gap is reserved between the upper sleeve box 30 and the lower sleeve box 31 to avoid friction during relative movement.
A test method of a reciprocating oscillation heat transfer simulation test device of an internal combustion engine comprises the following steps:
the method comprises the following steps: manufacturing a simplified connecting rod 13 according to the length of the connecting rod of the researched machine type, and rotationally connecting the connecting rod 13 with a connecting rod journal 19; then the length of the simulated crank is adjusted to the length of the actual model crank by rotating the hand wheel 24; the connecting rod 13 is rotatably connected with the ejector rod 11; after installation, the variable crank link mechanism 14 is kept at the bottom dead center position; the ejector rod 11 is connected with the frame 1 in a sliding way through an ejector rod guide mechanism, and the perpendicularity of the ejector rod 11 is ensured by the ejector rod guide mechanism;
step two: a left temperature sensor 41, a top temperature sensor 42, a right temperature sensor 43 and a bottom temperature sensor 44 are installed on the internal cooling oil cavity cooling piston test piece 9, temperature sensors for measuring the temperatures of an oil inlet and an oil outlet of the internal cooling oil cavity cooling piston test piece 9 are installed in the oil supply device and the residual oil collecting device 12, then the internal cooling oil cavity cooling piston test piece 9 is fixed on the test piece installation platform 10 through bolts, the position of the oil nozzle 7 is adjusted to enable the oil nozzle to be opposite to the oil inlet of the internal cooling oil cavity cooling piston test piece 9, and a heat insulation box 8 and a resistance wire are installed;
step three: starting an oil pump motor 5, starting an oil injection nozzle electromagnetic valve after the pressure of a pressure accumulator 6 reaches an experimental value and is constant, injecting high-pressure engine oil into an oil inlet of an internal cooling oil cavity cooling piston test piece 9 by an oil injection nozzle 7, and observing the oil injection condition when the internal cooling oil cavity cooling piston test piece 9 is still at a lower dead point;
step four: the upper computer sends out a command, the lower computer controls the servo motor device 15 to start, so that the variable crank connecting rod mechanism 14 stably runs at a certain rotating speed, and the connecting rod 13 and the ejector rod 11 drive the test piece mounting platform 10 and the cooling piston test piece 9 with the internal cooling oil cavity above the test piece mounting platform to reciprocate according to a given rule;
step five: a switch of a heating control box is turned on, the resistance wire is electrified, and the cooling piston test piece 9 with the internal cooling oil cavity in the heat insulation box 8 is heated, so that the temperature of the cooling piston test piece 9 with the internal cooling oil cavity is stabilized within the range of 200 +/-3 ℃;
step six: after 30 seconds, the movement of engine oil in the internal cooling oil cavity cooling piston test piece 9 is changed stably and periodically, and a temperature data recorder records the temperature of each test point on the internal cooling oil cavity cooling piston test piece 9 and the temperature of an oil inlet and an oil outlet of the internal cooling oil cavity cooling piston test piece 9;
step seven: after 5 minutes, the observation and recording are finished, the heating control box is closed firstly, and then oil injection is stopped and the switch of the servo motor device 15 is closed; the upper computer analyzes the collected data and calculates to obtain the average heat exchange coefficient of the wall surface of the oil cavity of the cooling piston test piece 9 of the internal cooling oil cavity;
step eight: the oil injection temperature in the oil supply system, the oil injection pressure of the high-pressure oil pump 4 and the rotating speed of the servo motor device 15 are changed through the control and measurement system, and experimental data under different working conditions are obtained through experiments.
While the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, and various changes can be made without departing from the spirit and scope of the present invention.
Claims (7)
1. A reciprocating oscillation heat transfer simulation test device of an internal combustion engine is characterized by comprising a main body oscillation mechanism, a power system, an oil supply and residual oil collecting system, a control and measurement system and a piston heating system; wherein:
the main body oscillation mechanism comprises a rack (1), a crank length adjusting device (2), a mandril guide mechanism, a connecting rod (13), a variable crank connecting rod mechanism (14), a mandril (11), a test piece mounting platform (10), an internal cooling oil cavity cooling piston test piece (9) and a right main journal (16);
the left side and the right side of the frame (1), mounting holes are formed in the upper parts of the crank length adjusting devices (2), the crank length adjusting devices penetrate through the mounting holes in the left side of the rack (1) and then are connected with the left side of a variable crank link mechanism (14) in the rack (1), a right main journal (16) penetrates through the mounting holes in the right side of the rack (1) and then is connected with the right side of the variable crank link mechanism (14), the right main journal (16) is axially fixed by the rack (1), a mandril guide mechanism is arranged at the mounting hole in the upper part of the rack (1), a test piece mounting platform (10) is fixed right above the rack (1), the upper end of a mandril (11) is connected with the test piece mounting platform (10), the lower end of the mandril guide mechanism penetrates through and then is connected with the upper end of a connecting rod (13) in the rack (1), the lower end of the connecting rod (13) is connected with the upper end of the variable crank link mechanism (14), and the crank length adjusting; the cooling piston test piece (9) with the inner cooling oil cavity is arranged at the upper part of the test piece mounting platform (10) and is provided with an oil inlet and an oil outlet;
the power system comprises a servo motor device (15), a motor output shaft (29) of the servo motor device (15) is connected with a right main journal (16), the servo motor device (15) drives a variable crank connecting rod mechanism (14) to reciprocate through the right main journal (16), and then the variable crank connecting rod mechanism (14) drives a connecting rod (13) to reciprocate up and down;
the oil supply and residual oil collecting system comprises an oil supply device and a residual oil collecting device (12), wherein the oil supply device is used for spraying engine oil to an oil inlet of the cooling piston test piece (9) with the inner cooling oil cavity, and the residual oil collecting device (12) is used for collecting the engine oil flowing out of an oil outlet of the cooling piston test piece (9) with the inner cooling oil cavity and the engine oil sprayed from the oil supply device but not sprayed into the oil inlet of the cooling piston test piece (9) with the inner cooling oil cavity;
the control and measurement system comprises an upper computer and a lower computer, wherein the upper computer is connected with the lower computer and used for transmitting instructions to the lower computer, and the lower computer is connected with the oil supply device and the servo motor device (15) and used for controlling the oil supply device and the servo motor device (15) to execute the instructions of the upper computer and feeding status data of the oil supply device and the servo motor device (15) back to the upper computer;
the piston heating system comprises a heating control box, an insulation box (8), a resistance wire and a wire, wherein the resistance wire is arranged in the insulation box (8) and is connected with the heating control box through the wire, a cooling piston test piece (9) with an inner cooling oil cavity is arranged in the insulation box (8) and is internally provided with a temperature sensor, one end of the temperature sensor inside the cooling piston test piece (9) with the inner cooling oil cavity is connected with the heating control box, the other end of the temperature sensor is connected with a temperature data recorder, temperature sensors for measuring the temperature of an oil inlet and an oil outlet of the cooling piston test piece (9) with the inner cooling oil cavity are respectively arranged in an oil supply device and a residual oil collecting device (12), the temperature sensors in the oil supply device and the residual oil collecting device (12) are directly connected with the temperature data recorder, after the heating control box is powered on, the heating of the insulation box (8) is realized through the, when a temperature sensor in the cooling piston test piece (9) with the internal cooling oil cavity detects that the temperature in the cooling piston test piece (9) with the internal cooling oil cavity exceeds a set temperature, the heating control box automatically cuts off the power of the lead, so that the cooling piston test piece (9) with the internal cooling oil cavity is stabilized within a set temperature range;
the cooling piston test piece (9) with the internal cooling oil cavity is the upper half part of a piston with the internal cooling oil cavity, a plurality of temperature sensors connected with a heating control box are arranged in the cooling piston test piece (9) with the internal cooling oil cavity, and when the temperature detected by the temperature sensor in any cooling piston test piece (9) with the internal cooling oil cavity exceeds a set value, the heating control box automatically cuts off the power of a wire;
the temperature sensors in the cooling piston test piece (9) with the internal cooling oil cavity comprise a left temperature sensor (41), a top temperature sensor (42), a right temperature sensor (43) and a bottom temperature sensor (44), and the four temperature sensors are used for respectively measuring the temperature of corresponding positions in the cooling piston test piece (9) with the internal cooling oil cavity;
the residual oil collecting device (12) comprises an upper jacket box (30), a lower jacket box (31), a cavity (32), an oil outlet collecting pipe (33), an un-sprayed oil collecting pipe (34), an oil spraying oil way (35) and a ventilation window (37), wherein the upper jacket box (30) is fixed with a test piece mounting platform (10) at the upper part, the inlet of the upper jacket box (30) is communicated with the oil outlet of the cooling piston test piece (9) with the inner cooling oil cavity, the lower jacket box (31) is positioned at the lower end of the upper jacket box (30) and is in clearance fit with the upper jacket box (30), the lower jacket box (31) is internally provided with a middle baffle (38), the cavity (32) with the ventilation window (37) is mounted at the outer side of the lower jacket box (31) and is provided with a middle partition plate (36) in the middle, the ventilation window (37) is communicated with the atmosphere, the middle baffle (38) divides the lower jacket box (31) into a left box body and a right box body, and engine oil flowing out from the oil outlet of the cooling, the engine oil which is sprayed from the oil supply device but is not sprayed into an oil inlet of the internal cooling oil cavity cooling piston test piece (9) splashes onto the wall surfaces of the upper jacket box (30) and the lower jacket box (31), then falls into the right box body of the lower jacket box (31) under the action of gravity, the cavity (32) is divided into a left cavity and a right cavity by the middle partition plate (36), a left square hole (39) communicated with the left cavity of the cavity (32) is formed in the bottom of the left box body of the lower jacket box (31), a right square hole (40) communicated with the right cavity of the cavity (32) is formed in the bottom of the right box body of the lower jacket box (31), the oil outlet collecting pipe (33) is communicated with the left cavity of the cavity (32), and the non-sprayed oil collecting pipe (34) is communicated with the right.
2. The internal combustion engine reciprocating oscillation heat transfer simulation test device according to claim 1, characterized in that: the crank length adjusting device (2) comprises a hand wheel (24), a sliding screw (25), a nut (26), a bearing (22), a sleeve (21) and a thrust retainer ring or double-nut fixed standard part (23); the sleeve (21) is installed in a mounting hole in the left side of the rack (1), the bearing (22) is installed inside the sleeve (21), the nut (26) is installed on an inner ring of the bearing (22) and is axially fixed, the thrust check ring or the double-nut fixing standard part (23) is fixed on the nut (26), the sliding screw (25) is in threaded connection with the inner wall of the nut (26), the left end of the sliding screw (25) is connected with the hand wheel (24), the right end of the sliding screw is connected with the left end of the variable crank link mechanism (14), and the axial position of the sliding screw (25) is changed by rotating the hand wheel (24), so that the variable crank link mechanism (14) is pushed to move.
3. The internal combustion engine reciprocating oscillation heat transfer simulation test device according to claim 1, characterized in that: the variable crank connecting rod mechanism (14) comprises a left crank (20), a connecting rod journal (19) and a right crank (18), the left end of the left crank (20) is connected with the crank length adjusting device (2), the right end of the left crank (20) is connected with the left end of the connecting rod journal (19), the right end of the connecting rod journal (19) is connected with the left end of the right crank (18), the right end of the right crank (18) is connected with the right main journal (16), the middle part of the connecting rod journal (19) is connected with a connecting rod (13) above, the ejector rod guide mechanism comprises an ejector rod sleeve (27) and an ejector rod sleeve seat (28), the ejector rod sleeve seat (28) is positioned at a mounting hole at the upper part of the rack (1), the ejector rod sleeve (27) is mounted inside the ejector rod sleeve seat (28), the lower end of the ejector rod (11) penetrates through the ejector rod sleeve (27) and then extends into the rack (1), and the ejector rod (11) freely slides in the ejector rod sleeve (27), the lower end of the ejector rod (11) is provided with a connecting lug, the connecting lug is provided with a pin hole, the upper end of the connecting rod (13) is provided with a small connecting rod head, the lower end of the connecting rod (13) is provided with a large connecting rod head, the small connecting rod head is provided with a pin hole, a pin penetrates through the pin hole in the connecting lug and the pin hole in the small connecting rod head to enable the connecting rod (13) to be rotatably connected with the ejector rod (11), and the large connecting rod head of the connecting rod (13) is rotatably connected with the.
4. A reciprocating oscillation heat transfer simulation test device of an internal combustion engine according to claim 3, characterized in that: the variable crank link mechanism (14) further comprises vibration balancing devices (17) at the left end and the right end, the left end of the vibration balancing device (17) at the left end is connected with the crank length adjusting device (2), the right end of the vibration balancing device (17) at the left end is connected with the left end of the left crank (20), the left end of the vibration balancing device (17) at the right end is connected with the right end of the right crank (18), and the right end of the vibration balancing device (17) at the right end is connected with the right main journal (16).
5. The internal combustion engine reciprocating oscillation heat transfer simulation test device according to claim 1, characterized in that: the oil supply device comprises an oil storage tank (3), a high-pressure oil pump (4), an oil pump motor (5), a pressure accumulator (6) and an oil nozzle (7), wherein the high-pressure oil pump (4) is respectively connected with the oil storage tank (3), the oil pump motor (5) and the pressure accumulator (6), the pressure accumulator (6) is connected with the oil nozzle (7), and the oil nozzle (7) is adjusted through an oil nozzle position adjusting device to be aligned with an oil inlet of an inner cooling oil cavity cooling piston test piece (9).
6. The internal combustion engine reciprocating oscillation heat transfer simulation test device according to claim 1, characterized in that: the section of the middle baffle (38) is in a crank shape.
7. A test method of a reciprocating oscillation heat transfer simulation test device of an internal combustion engine according to any one of claims 1 to 6, characterized by comprising the steps of:
the method comprises the following steps: manufacturing a simplified connecting rod (13) according to the length of the connecting rod of the researched machine type, and rotationally connecting the connecting rod (13) with a connecting rod journal (19); then the length of the simulated crank is adjusted to the length of the actual model crank by rotating a hand wheel (24); the connecting rod (13) is rotationally connected with the ejector rod (11); after installation, the variable crank connecting rod mechanism (14) is kept at the bottom dead center position; the ejector rod (11) is connected with the frame (1) in a sliding way through an ejector rod guide mechanism, and the perpendicularity of the ejector rod (11) is ensured by the ejector rod guide mechanism;
step two: installing a left temperature sensor (41), a top temperature sensor (42), a right temperature sensor (43) and a bottom temperature sensor (44) in an inner cooling oil cavity cooling piston test piece (9), installing temperature sensors for measuring the temperatures of an oil inlet and an oil outlet of the inner cooling oil cavity cooling piston test piece (9) in an oil supply device and a residual oil collecting device (12), then fixing the inner cooling oil cavity cooling piston test piece (9) on a test piece installation platform (10) through bolts, adjusting the position of an oil nozzle (7) to enable the oil nozzle to be over against the oil inlet of the inner cooling oil cavity cooling piston test piece (9), and installing a heat preservation box (8) and a resistance wire;
step three: starting an oil pump motor (5), starting an oil injection nozzle electromagnetic valve after the pressure of a pressure accumulator (6) reaches an experimental value and is constant, injecting high-pressure engine oil into an oil inlet of an internal cooling oil cavity cooling piston test piece (9) by an oil injection nozzle (7), and observing the condition of engine oil injection when the internal cooling oil cavity cooling piston test piece (9) is still at a lower dead point;
step four: the upper computer sends out a command, the lower computer controls a servo motor device (15) to start, so that a variable crank connecting rod mechanism (14) stably operates at a certain rotating speed, and a test piece mounting platform (10) and an internal cooling oil cavity cooling piston test piece (9) above the test piece mounting platform are driven to reciprocate according to a given rule through a connecting rod (13) and a mandril (11);
step five: a switch of a heating control box is turned on, the resistance wire is electrified, and the cooling piston test piece (9) with the inner cooling oil cavity in the heat insulation box (8) is heated, so that the temperature of the cooling piston test piece (9) with the inner cooling oil cavity is stabilized at 200 +/-3
Within the range of degrees;
step six: after 30 seconds, the movement of engine oil in the cooling piston test piece (9) with the inner cooling oil cavity is changed stably and periodically, and a temperature data recorder records the temperature of each test point on the cooling piston test piece (9) with the inner cooling oil cavity and the temperature of an oil inlet and an oil outlet of the cooling piston test piece (9) with the inner cooling oil cavity;
step seven: after 5 minutes, the observation and recording are finished, the heating control box is closed firstly, and then oil injection is stopped and the switch of the servo motor device (15) is closed; the upper computer analyzes the collected data and calculates to obtain the average heat exchange coefficient of the wall surface of the oil cavity of the cooling piston test piece (9) of the internal cooling oil cavity;
step eight: the oil injection temperature in the oil supply system, the oil injection pressure of the high-pressure oil pump (4) and the rotating speed of the servo motor device (15) are changed through the control and measurement system, and experimental data under different working conditions are obtained through experiments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711023449.XA CN108051225B (en) | 2017-10-27 | 2017-10-27 | Internal combustion engine reciprocating oscillation heat transfer simulation test device and test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711023449.XA CN108051225B (en) | 2017-10-27 | 2017-10-27 | Internal combustion engine reciprocating oscillation heat transfer simulation test device and test method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108051225A CN108051225A (en) | 2018-05-18 |
| CN108051225B true CN108051225B (en) | 2020-04-07 |
Family
ID=62119476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711023449.XA Active CN108051225B (en) | 2017-10-27 | 2017-10-27 | Internal combustion engine reciprocating oscillation heat transfer simulation test device and test method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108051225B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057859A (en) * | 2019-03-18 | 2019-07-26 | 昆明理工大学 | A kind of simulator and test method of oil duct in piston oscillating heat transfer performance |
| CN110274931B (en) * | 2019-07-03 | 2024-02-27 | 河北科技大学 | Two-phase flow oscillation experimental device and experimental method |
| CN110579355A (en) * | 2019-08-16 | 2019-12-17 | 华中科技大学 | device and method for testing vibration performance of cooling oil in piston of internal combustion engine |
| CN113029579B (en) * | 2021-02-04 | 2022-06-28 | 昆明理工大学 | Magnetic drive suspension oscillation heat transfer simulation test device |
| CN113027608B (en) * | 2021-04-06 | 2022-03-01 | 华中科技大学 | Internal combustion engine piston top surface transient temperature remote measuring system and installation method thereof |
| CN113790898B (en) * | 2021-09-14 | 2024-05-17 | 潍柴动力股份有限公司 | Detection device and detection method for cooling efficiency of piston inner cooling oil duct |
| CN114279711B (en) * | 2021-12-23 | 2024-03-29 | 中国船舶集团有限公司第七一一研究所 | Piston heat transfer test device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201373807Y (en) * | 2009-03-13 | 2009-12-30 | 中国船舶重工集团公司第七一一研究所 | Piston vibrating cooling test device |
| CN201475275U (en) * | 2009-06-18 | 2010-05-19 | 梁玉昆 | Stepless speed adjustor |
| CN102032991A (en) * | 2010-11-16 | 2011-04-27 | 北京理工大学 | Engine piston oscillating and cooling test device |
| RU2473067C1 (en) * | 2011-08-12 | 2013-01-20 | Учреждение Российской академии наук Институт проблем управления им. В.А. Трапезникова РАН | Method of diagnosing internal combustion engine |
| CN202867746U (en) * | 2012-11-06 | 2013-04-10 | 中国矿业大学 | Reciprocating motion mechanism with stroke adjustable |
| CN103048141A (en) * | 2012-12-31 | 2013-04-17 | 武汉理工大学 | Test system for heat exchange of internal cooling oil duct of internal-combustion engine piston |
| CN205785799U (en) * | 2016-07-11 | 2016-12-07 | 滨州学院 | A kind of dynamic and visual target practice testing stand |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5528928A (en) * | 1995-01-30 | 1996-06-25 | Caterpillar Inc. | Capacitive sensing apparatus for sensing a plurality of operating parameters associated with an engine |
| JP4133133B2 (en) * | 2002-09-03 | 2008-08-13 | シェブロンジャパン株式会社 | Lubricating oil piston under crown deposition tester |
| CN101793607B (en) * | 2010-03-30 | 2012-05-09 | 山东大学 | Cooling test device of engine piston injected oil |
| CN202177509U (en) * | 2011-07-22 | 2012-03-28 | 天津雷沃动力股份有限公司 | Testing apparatus for testing jetting state of cooling nozzle |
| JP6136048B2 (en) * | 2012-12-26 | 2017-05-31 | 国立研究開発法人水産研究・教育機構 | Reciprocating machine condition monitoring system, method and program |
| CN103398852A (en) * | 2013-08-01 | 2013-11-20 | 中国北方发动机研究所(天津) | Piston cooling oil testing device and testing method |
| CN103543015B (en) * | 2013-09-22 | 2016-05-25 | 华中科技大学 | Internal combustion engine Oil injection cooling experimental measurement device |
-
2017
- 2017-10-27 CN CN201711023449.XA patent/CN108051225B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201373807Y (en) * | 2009-03-13 | 2009-12-30 | 中国船舶重工集团公司第七一一研究所 | Piston vibrating cooling test device |
| CN201475275U (en) * | 2009-06-18 | 2010-05-19 | 梁玉昆 | Stepless speed adjustor |
| CN102032991A (en) * | 2010-11-16 | 2011-04-27 | 北京理工大学 | Engine piston oscillating and cooling test device |
| RU2473067C1 (en) * | 2011-08-12 | 2013-01-20 | Учреждение Российской академии наук Институт проблем управления им. В.А. Трапезникова РАН | Method of diagnosing internal combustion engine |
| CN202867746U (en) * | 2012-11-06 | 2013-04-10 | 中国矿业大学 | Reciprocating motion mechanism with stroke adjustable |
| CN103048141A (en) * | 2012-12-31 | 2013-04-17 | 武汉理工大学 | Test system for heat exchange of internal cooling oil duct of internal-combustion engine piston |
| CN205785799U (en) * | 2016-07-11 | 2016-12-07 | 滨州学院 | A kind of dynamic and visual target practice testing stand |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108051225A (en) | 2018-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108051225B (en) | Internal combustion engine reciprocating oscillation heat transfer simulation test device and test method thereof | |
| CN108007693B (en) | Internal combustion engine piston internal cooling oil duct oscillation flow simulation device and test method | |
| CN106840673B (en) | Marine diesel slides base bearing pyroelectric signal caliberating device and scaling method | |
| CN105445124B (en) | A kind of valve high temperature fatigue testing machine | |
| Tormos et al. | A general model to evaluate mechanical losses and auxiliary energy consumption in reciprocating internal combustion engines | |
| CN103398852A (en) | Piston cooling oil testing device and testing method | |
| RU2691259C1 (en) | Method for determination of a gap in a crank-rod bearing of a crankshaft during testing and diagnostics of an internal combustion engine of vehicles, transport and transport-process machines | |
| CN206270190U (en) | Reciprocating machine piston-ring friction abrasion test device | |
| CN108051219B (en) | Reciprocating motion simulation mechanism of internal combustion engine with variable crank radius | |
| CN109975006A (en) | A kind of vertical low speed machine connecting rod bearing shell fatigue test platform machine | |
| CN101793607A (en) | Cooling test device of engine piston injected oil | |
| CN103543015A (en) | Cooling experiment measuring device for oil injection of piston of internal combustion engine | |
| CN103048141B (en) | Test system for heat exchange of internal cooling oil duct of internal-combustion engine piston | |
| CN102607835B (en) | Film lubrication and heat transfer testing system for high-speed friction pair | |
| CN105938049A (en) | Dynamic visual targeting test platform and test method | |
| CN103994881A (en) | Piston oscillation oil chamber test simulation apparatus | |
| CN112781883B (en) | Visual device for engine oil movement condition in piston inner cooling oil cavity | |
| CN110579355A (en) | device and method for testing vibration performance of cooling oil in piston of internal combustion engine | |
| US5860395A (en) | Piston cooling by oil flow from a pocket reservoir and passageway formed in the piston | |
| CN205333439U (en) | Valve high temperature fatigue testing machine | |
| CN113029579B (en) | Magnetic drive suspension oscillation heat transfer simulation test device | |
| CN112798240B (en) | Piston cooling nozzle test device for simulating real working conditions | |
| CN205785799U (en) | A kind of dynamic and visual target practice testing stand | |
| CN109653926B (en) | Detection device for automobile bearing and automobile fuel pump | |
| Massini et al. | Windage losses of a meshing gear pair measured at different working conditions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220617 Address after: 239000 No. 3, Weiyi Road, economic development zone, Quanjiao County, Chuzhou City, Anhui Province Patentee after: Anhui jialaidun piston auto parts Co.,Ltd. Address before: 650093 No. 253, Xuefu Road, Wuhua District, Yunnan, Kunming Patentee before: Kunming University of Science and Technology |