CN105628535B - The variable internal combustion engine cylinder jacket piston-ring friction performance aircraft of reciprocating stroke - Google Patents

The variable internal combustion engine cylinder jacket piston-ring friction performance aircraft of reciprocating stroke Download PDF

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Publication number
CN105628535B
CN105628535B CN201610128657.5A CN201610128657A CN105628535B CN 105628535 B CN105628535 B CN 105628535B CN 201610128657 A CN201610128657 A CN 201610128657A CN 105628535 B CN105628535 B CN 105628535B
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China
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fixed
cylinder sleeve
piston ring
cantilever
test specimen
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CN201610128657.5A
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Chinese (zh)
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CN105628535A (en
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余志壮
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同济大学
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/56Investigating resistance to wear or abrasion

Abstract

The present invention relates to the testing machine for studying combustion engine mechanical power consumption, the variable cylinder liner piston ring frictional property test machine of specially a kind of reciprocating stroke.A kind of variable internal combustion engine cylinder jacket piston-ring friction performance aircraft of reciprocating stroke, including platform (24) and bottom plate (31), it is characterized in that:Also include pulley shaft (6), bearing (7), big belt pulley (9), radius variable crank disc (10), the pin-and-hole (11) of straight pin is installed, connecting rod (12), adjust bar guide holder (13), adjust bar (14), guide rail (15), loading hole (16), cantilever beam (17), piston ring fixture (18), piston ring test specimen (19), cylinder sleeve test specimen (20), pull pressure sensor (21), cylinder sleeve base (22), sensor stand (23) and measurement bar (32) etc..Parameter of the present invention is easy to control, and sample is easy to obtain, and test data precision is high, and contact conditions are easy to simulate.

Description

The variable internal combustion engine cylinder jacket of reciprocating stroke-piston-ring friction performance aircraft
Technical field
The present invention relates to the testing machine for studying combustion engine mechanical power consumption, the variable cylinder sleeve of specially a kind of reciprocating stroke Piston-ring friction performance aircraft.
Background technology
Internal combustion engine is that very extensive power set are applied in national economy, under the trend of energy-saving and emission-reduction, for internal combustion The economic performance requirement of machine is constantly being lifted, and discharge standard is also increasingly strict, and it is to realize internal combustion that the friction power loss of internal combustion engine, which lowers, One main aspect of the energy-saving consumption-reducing target of machine.
Mechanical friction power consumption penalty occupies very big ratio in the power loss of internal combustion engine, reduces mechanical friction power consumption damage The economic performance lost for internal combustion engine, which improves, important influence.Mechanical friction power consumption penalty be mainly reciprocating block slider crank mechanism, The friction power loss loss of cylinder sleeve-piston ring mechanism, atomizer exhaust valve mechanism and other mechanisms.
The friction loss of piston and rings is the major part of the mechanical friction loss of internal combustion engine.Therefore, cylinder is studied Fretting wear between set-piston ring, the mechanical friction loss for reducing internal combustion engine, realizing the efficiency raising of internal combustion engine has Important meaning.Cylinder sleeve-piston ring is a pair of important friction pairs, in order to study the mill of the friction between cylinder sleeve-piston ring Performance is damaged, it is necessary to the service behaviour between cylinder sleeve-piston ring of internal combustion engine be simulated using frictional testing machine, no matter for new machine The exploitation of type or the improvement of original type, the optimization design of cylinder sleeve-piston ring can be promoted, improve the dynamic property of internal combustion engine Energy, economic performance and reliability.
Friction be present because of having with respect to slip between Cylinder Liner-piston Ring.Such sliding friction can be divided into dry friction again, Boundary lubrication, fluid lubrication and mixed lubrication.
The friction, lubrication state of Cylinder Liner-piston Ring is among continuous change.When piston reaches the upper and lower stop position of cylinder jacket When putting, piston movement direction will change, and now, the inertia force and alternate load suffered by cylinder sleeve-piston ring are very big, and cylinder sleeve- Piston Ring is in semi-dry friction or dry condition;When piston is in cylinder jacket medium position, piston and cylinder jacket Relative sliding velocity it is larger, friction pair is in boundary lubrication condition.
The research method of cylinder sleeve-piston ring mainly has theoretical research and experimental study method.
Experimental study method is one of main method for studying internal combustion engine cylinder jacket-piston-ring friction abrasion.Cylinder sleeve, work The sample of Pass Test machine dimensional standard is respectively prepared in plug ring, then again by the testing machine field investigation of certain time, to grind Study carefully the friction and wear behavior of cylinder sleeve-piston ring.If the simulation of testing machine reciprocating stroke is more less than actual row Journey, then result of the test can not correctly reflect real cylinder sleeve-piston-ring friction polishing machine.
Testing machine used by domestic and international full-sized car company and Combustion Engineering Inc. (CE) or research institution at present, its piston ring Stroke is all fixed, it is impossible to is changed.In fact, large combustion engines, its piston stroke reciprocal distance is long, small-sized internal combustion Machine, its piston stroke reciprocal distance are shorter.Friction and wear behavior experiment is done on testing machine, can only be according to the row of internal combustion engine Journey, the identical or close testing machine of stroke size is found, carries out correlation test.Piston test stroke does not reach corresponding long Reciprocal distance, will necessarily influence experiment correctness.If all manufacture corresponding each model for large-scale, compact internal combustion engine Testing machine, the cost of used device will necessarily be increased.So, the internal combustion engine cylinder jacket piston-ring friction performance examination of only journey variable Machine is tested, can both meet the experiment of large combustion engines, and also meet the experiment of compact internal combustion engine.
The content of the invention
In order to overcome the unalterable technological deficiency of existing stroke, the invention discloses a kind of reciprocating stroke is variable Internal combustion engine cylinder jacket-piston-ring friction performance aircraft, and possess that parameter is easy to control, sample is easy to obtain, test data precision High, friction environment is easy to the characteristic of simulation.
The present invention reaches goal of the invention by following technical solution:
A kind of variable internal combustion engine cylinder jacket of reciprocating stroke-piston-ring friction performance aircraft, including platform and bottom plate, Platform is fixed on bottom plate, it is characterized in that:Also include lubricating oil pipe, fuel tank, peristaltic pump, bolt, motor, pulley shaft, branch Seat, big belt pulley, radius variable crank disc, the pin-and-hole for installing straight pin, connecting rod, adjustment bar guide holder, adjustment bar, guide rail, use In the loading hole of arrangement loading device, cantilever beam, piston ring fixture, piston ring test specimen, cylinder sleeve test specimen, pull pressure sensor, cylinder Base, sensor stand and measurement bar are covered,
Two bearings are abreast fixed by bolts on bottom plate relatively, and the both ends of pulley shaft are rotatably arranged in respectively On one bearing, big belt pulley and radius variable crank disc both of which are arranged by the respective center of circle and are fixed on belt pulley wheel On axle, radius variable crank disc is provided with least three pin-and-holes for being used to install straight pin, each pin-and-hole and radius variable crank The length of disk circle center line connecting is all unequal;
Adjustment bar guide holder and guide rail are sequentially fixed on platform, and one on one end connection radius variable crank disc of connecting rod Individual pin-and-hole, the other end of connecting rod are set in adjustment bar guide holder, and cylinder sleeve base slides on guide rail and along guide rail, cylinder sleeve examination Part is fixed on cylinder sleeve base, and the one end for adjusting bar is set in adjustment bar guide holder, and the other end for adjusting bar is consolidated by bolt It is scheduled on cylinder sleeve base, is bolted between guide holder inside connecting rod and adjustment bar, the fixing end of cantilever beam is fixed on platform On, the crossbeam of cantilever beam is horizontally arranged on cylinder sleeve base, and cantilever beam is provided with loading device, and piston ring fixture is fixed on cantilever Liang Shang, piston ring test specimen are fixed on cylinder sleeve test specimen, and piston ring test specimen is set in piston ring clamp tool, and sensor stand is fixed on On cylinder sleeve base, pull pressure sensor is fixed on sensor stand, one end connection pull pressure sensor of measurement bar, measurement bar The other end connection piston ring test specimen;
Fuel tank and peristaltic pump are all fixed on bottom plate, and fuel tank connects peristaltic pump, the oil transportation mouth of peristaltic pump by lubricating oil pipe Rubbing surface between face piston ring fixture and piston ring test specimen, the casing of motor are bolted on bottom plate, motor Output shaft connects big belt pulley by transmission mechanisms such as belts.
The variable internal combustion engine cylinder jacket of described reciprocating stroke-piston-ring friction performance aircraft, it is characterized in that:
Fixed block of the described loading device from connection on a cantilever beam;
Make central projection to each pin-and-hole by subpoint of the radius variable crank disc center of circle, each pin-and-hole is bent in radius variable Subpoint on handle disk circumference is evenly distributed around radius variable crank disc circumference;
Heater is provided with cylinder sleeve base.
The purpose that the present invention primarily realizes is that reciprocating stroke is variable, purpose centered on this, is made as described above Corresponding mechanism improves.
In use, guide rail is fixed on platform, adjustment bar guide holder is also secured on platform the present invention, and adjustment bar is connected to Reciprocating on cylinder sleeve base, guide rail play the guiding role to cylinder sleeve base.
A variety of different reciprocating strokes are realized, it is necessary to have multiple different crank lengths and length of connecting rod.Pass through first Different pin-and-holes on connecting crank disk, multiple different crank lengths are realized, and the length of connecting rod can be according to crank connecting link machine The corresponding relation of structure designs.
The movement locus of crank circle be designed as one can side radius crank disk, by different crank lengths as radius, Can be on side radius crank disk 10 different radii point design pin-and-hole 11.For the connecting rod 12 of each corresponding length, connecting rod As long as 12 circular motion point is connected with the pin installed on pin-and-hole, various sizes of toggle is just formed.When crank is transported When dynamic, the corresponding point that moves back and forth just has different reciprocating strokes on connecting rod 12.
Because each reciprocating stroke can complete reciprocating motion experiment more slightly larger than the trip or more slightly smaller than the trip, only need Select several limited throw of crankshaft numerical value, it becomes possible to complete a range of reciprocating stroke experiment.
The present invention chooses the throw of crankshaft of different numerical value, corresponds to expense hole in disk, which forms radius variable crank Disk.Connecting rod is connected by straight pin and radius variable crank disc.
Such design so that move back and forth test trip and covers substantially stroke model in conventional internal combustion engine cylinder Enclose.
But the only convenient load that applies could preferably carry out friction-wear test.In order that the point of load must be applied, And the point of clamp piston ring test specimen, as central point of cylinder sleeve test specimen when static, reciprocating central point is also served as, even The reciprocating motion point of bar is designed with corresponding different supporting adjustment bars, you can realizes reciprocating central point with applying load Point is corresponding.The design of adjustment bar can also avoid the plane motion of connecting rod from having an impact the robust motion of cylinder sleeve test specimen.
Cantilever beam has fixing end and cantilever end, and a circular hole is provided with the close fixing end of cantilever beam.The fixing end of cantilever beam For cantilever beam to be fixed on the support of side and is fixed on platform.The cantilever end of cantilever beam is disposed with piston ring fixture, Piston ring test specimen can be clamped.
Adoptable load mode has two kinds, and the first is that the weight as fixed block is placed above the cantilever end of cantilever beam Code, the value of counterweight determine according to the needs of loading force;It is for second that circular hole arranged beneath on a cantilever beam has fixed block, Fixed block is fixed on platform with screw, and fixed block upper top is provided with bolt hole, is joined with bolt through the circular hole on cantilever beam Fixed block is connected to, when bolt is tightened, you can so that the cantilever end of cantilever beam pressurizes downwards.Spiral shell can be carried out according to mechanics method The bolt amount of tightening and the calculating of cantilever end pressure.
Cantilever beam is made up of aluminium alloy.When the cantilever end of cantilever beam is under the Lateral Force parallel to platform, cantilever beam Laterally there is very sensitive change shaped reaction.After cylinder sleeve test specimen starts reciprocating, because cylinder sleeve test specimen and piston ring try Frictional force is changed between part, the cantilever end of cantilever beam produces corresponding transversely deforming, the measurement bar installed on sensor stand Deformation can be measured.
Instant invention overcomes the deficiencies in the prior art, there is provided a kind of variable cylinder liner piston ring frictional behaviour of reciprocating stroke Testing machine, the present invention design realized cylinder sleeve-piston ring tester, also with test parameters is easy to control, result of the test repeats Property preferably, sample is easily obtained, friction-wear test data precision is high and cylinder sleeve-piston ring contact condition to be easy to simulation etc. excellent Point, influence of the influence factor for having actual cylinder sleeve-piston-ring friction abrasion to experiment can be reflected.It is most important to go back That stroke is adjustable, you can with to large combustion engines, can also centering compact internal combustion engine carry out cylinder liner piston ring friction-wear test. It using testing equipment of the present invention, can tally with the actual situation, simulation internal combustion engine environment can be closer to.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of testing machine of the present invention;
Fig. 2 is that toggle realizes the variable design signal of reciprocating stroke;
Fig. 3 is the toggle schematic diagram of radius variable;
Fig. 4 is cantilever beam and loading system, the partial enlarged drawing of data collecting system in the present invention.
Embodiment
The present invention is further illustrated below by way of specific embodiment.
Embodiment 1
A kind of variable internal combustion engine cylinder jacket of reciprocating stroke-piston-ring friction performance aircraft, including lubricating oil pipe 1, Fuel tank 2, peristaltic pump 3, bolt 4, motor 5, pulley shaft 6, bearing 7, big belt pulley 9, radius variable crank disc 10, installation circle The pin-and-hole 11 of pin, connecting rod 12, adjustment bar guide holder 13, adjustment bar 14, guide rail 15, the loading hole for arranging loading device 16th, cantilever beam 17, piston ring fixture 18, piston ring test specimen 19, cylinder sleeve test specimen 20, pull pressure sensor 21, cylinder sleeve base 22, biography Sensor bracket 23, the bottom plate 31 of platform 24 and measurement bar 32, as shown in Figure 1 to 4, concrete structure is:
Platform 24 is fixed on bottom plate 31, and two bearings 7 are abreast fixed on bottom plate 31 with bolt 4 relatively, belt pulley The both ends of wheel shaft 6 are rotatably arranged on a bearing 7 respectively, and big belt pulley 9 and the both of which of radius variable crank disc 10 are led to Cross the respective center of circle to be arranged and be fixed on pulley shaft 6, radius variable crank disc 10 is provided with least three and is used to install The pin-and-hole 11 of straight pin, the length of each pin-and-hole 11 and radius variable crank disc 10 circle center line connecting are all unequal;
Adjustment bar guide holder 13 and guide rail 15 are sequentially fixed on platform 24, one end connection radius variable crank of connecting rod 12 A pin-and-hole 11 on disk 10, the other end connection adjustment bar of connecting rod 12, cylinder sleeve base 22 is on the guide rail 15 and along guide rail 15 Slide, cylinder sleeve test specimen 20 is fixed on cylinder sleeve base 22, and through adjustment bar guide holder 13, the guide holder can for one end of adjustment bar 14 To be oriented to the motion for adjusting bar 14, the other end of adjustment bar 14 is fixed on cylinder sleeve base 22 by bolt 4, connecting rod 12 It is connected with adjustment bar 14, in the node location being connected, is connected using pin-and-hole mode or articulated manner, so that connecting rod 12 and adjustment bar 14 can be rotated in node location, and the fixing end of cantilever beam 17 is fixed on platform 24, and the crossbeam of cantilever beam 17 is horizontally arranged at On cylinder sleeve base 22, cantilever beam 17 is provided with the loading hole 16 as loading device, and easy loading method is worn with nut Cross loading to be screwed on the fixed block of the lower section of cantilever beam 17, when nut is tightened or is unscrewed, it is possible to realize loading or off-load, piston Ring fixture 18 is fixed on cantilever beam 17, and for clamp piston ring test specimen, piston ring test specimen 19 can contact with cylinder sleeve test specimen 20, Friction pair is formed, piston ring test specimen 19 is set in piston ring fixture 18, and sensor stand 23 is fixed on cylinder sleeve base 22, Pull pressure sensor 21 is fixed on sensor stand 23, one end connection pull pressure sensor 21 of measurement bar 32, measurement bar 32 The other end point to cantilever beam-ends be used for signal measurement;
Fuel tank 2 and peristaltic pump 3 are all fixed on bottom plate 31, and fuel tank 2 connects peristaltic pump 3, peristaltic pump 3 by lubricating oil pipe 1 Oil transportation mouth face piston ring fixture 18 and piston ring test specimen 19 between rubbing surface, the casing of motor 5 is fixed on by bolt 4 On bottom plate 31, the output shaft of motor 5 connects big belt pulley 9 by transmission mechanisms such as belts.
In the present embodiment:
Described loading device is from the fixed block being connected on cantilever beam 17, for arranging the loading hole 16 of loading device On cantilever beam 17, fixed block is fixed on platform 24;
Pin-and-hole 11 shares six, makees central projection to each pin-and-hole 11 using the center of circle of radius variable crank disc 10 as subpoint, Subpoint of each pin-and-hole 11 on the circumference of radius variable crank disc 10 is evenly distributed around the circumference of radius variable crank disc 10, i.e., The line of each subpoint of pin-and-hole 11 forms the inscribed regular hexagon of the circumference of radius variable crank disc 10;
Heater is provided with cylinder sleeve base 22.
In use, guide rail 15 is fixed on platform 24, adjustment bar guide holder 13 is also secured on platform 24 the present embodiment, is adjusted Whole bar 14 is connected to reciprocating on cylinder sleeve base 22, and guide rail 15 play the guiding role to cylinder sleeve base 22.
Reciprocatory movement of the piston of internal combustion engine in cylinder, is realized by toggle.Reciprocating linear is transported Dynamic system composition is as shown in Figure 2.
If the BO in Fig. 2 is the radius that crank is variable radius crank disk 10, AB is connecting rod 12, and O points revolve for crank The central point turned, A points are the tie point of connecting rod 12 and piston, namely the reciprocating motion point of connecting rod, B points are the company of connecting rod and crank Contact, namely the circular motion point of connecting rod.When crank rotates around O points, the track of B points is a circle, and connecting rod AB does plane fortune Dynamic, A points move reciprocatingly.When the piston ring fixture 18 being connected with A points clamps piston ring test specimen 19, you can with it is relatively quiet Relative motion is produced between cylinder sleeve test specimen 20 only, when the friction pair formed to both piston ring test specimen 19 and cylinder sleeve test specimen 20 When applying load, that is, produce friction and wear.
The a variety of different reciprocating strokes of A points are realized, it is necessary to have multiple different crank lengths and length of connecting rod.As used Single crank, it is desirable to the crank length of multiple different lengths.First by connecting on radius variable crank disc 10 not With pin-and-hole 11, multiple different crank lengths are realized, and the length of connecting rod 12 can be according to the corresponding relation of toggle Design.
Now in the crank set of different length a to disk, so as to devise a radius variable crank disc 10, Pin-and-hole 11 is designed on radius variable crank disc 10, the distance in the center of circle to the center of circle of pin-and-hole 11 of radius variable crank disc 10 is equal to crank To the distance in crank-pin axle center, such line from the center of circle of radius variable crank disc 10 to the center of circle of pin-and-hole 11 is exactly in fact in axle center A crank in matter.By different crank lengths as radius, in different radii point design that can be on side radius crank disk 10 Go out each pin-and-hole 11.For the connecting rod 12 of each corresponding length, as long as the B points of connecting rod 12 and the pin phase installed on pin-and-hole 11 Connection, just forms various sizes of toggle.When crank-motion, corresponding A points just have different reciprocating strokes.
Because each reciprocating stroke can complete reciprocating motion experiment more slightly larger than the trip or more slightly smaller than the trip, only need Select several limited throw of crankshaft numerical value, it becomes possible to complete a range of reciprocating stroke experiment.
The present embodiment chooses 50mm, 60mm, 70mm, 80mm, 90mm, the throw of crankshaft of six numerical value of 100mm, on disk 6 holes are opened, are uniform in circumferential 360 degree scopes of 6 holes in disk.Which forms radius variable crank disc.Connecting rod It is connected by straight pin and radius variable crank disc.
Such design so that move back and forth test trip and covers substantially stroke model in conventional internal combustion engine cylinder Enclose.
But the only convenient load that applies could preferably carry out friction-wear test.In order that the point of load must be applied, And the point of clamp piston ring test specimen 19, as central point of the cylinder sleeve test specimen 20 when static, reciprocating central point is also served as, Corresponding different supporting adjustment bars 14 are designed with the A points of connecting rod 12, you can realize reciprocating central point with applying load Point it is corresponding.The setting of adjustment bar 14 can also avoid the plane motion of connecting rod 12 from influenceing the robust motion of cylinder sleeve test specimen 20.
The present embodiment, the different Traffic control systems of realization and the toggle size of design, such as table 1:
Table 1
Stroke S Throw of crankshaft R Length of connecting rod L Adjust pole length L1
100 50 180 420
120 60 210 390
140 70 240 360
160 80 270 330
180 90 300 300
200 100 330 270
Cantilever beam as shown in Figure 4 and loading system:
Cantilever beam 17 has fixing end and cantilever end, is provided with the close fixing end of cantilever beam 17 for arranging loading device Loading hole 16, the fixing end of cantilever beam 17 are used to be fixed on the support of side cantilever beam 17 and be fixed on platform 24.It is outstanding The cantilever end of arm beam 17 is disposed with piston ring fixture 18, can clamp piston ring test specimen 19.
Adoptable load mode has two kinds, and first way is to be placed above the cantilever end of cantilever beam 17 as fixation The counterweight of block, the value of counterweight determine according to the needs of loading force;The second way is already described above, i.e., on cantilever beam 17 Circular hole arranged beneath has fixed block, and fixed block is fixed on platform 24 with screw, and fixed block upper top is provided with bolt hole, with spiral shell Bolt is connected in fixed block through the circular hole on cantilever beam 17, when bolt is tightened, you can so that the cantilever end of cantilever beam 17 is downward Pressurization.The bolt amount of tightening and the calculating of cantilever end pressure can be carried out according to mechanics method, even in the cantilever end of cantilever beam 17 Loading hole 16 is provided with, load mode is nor affected on and still selects first way.
Data collecting system is for example as shown in Figure 4.
Cantilever beam 17 is made up of aluminium alloy.When the cantilever end of cantilever beam 17 is under the Lateral Force parallel to platform 24, Cantilever beam 17 is laterally having very sensitive change shaped reaction.After cylinder sleeve test specimen 20 starts reciprocating, due to cylinder sleeve test specimen Frictional force is changed between 20 and piston ring test specimen 19, the cantilever end of cantilever beam 17 produces corresponding transversely deforming, sensor branch The measurement bar 32 installed on frame 23 can measure to deformation.

Claims (2)

1. a kind of variable internal combustion engine cylinder jacket of reciprocating stroke-piston-ring friction performance aircraft, including platform (24) and bottom Plate (31), platform (24) are fixed on bottom plate (31), it is characterized in that:Also include lubricating oil pipe (1), fuel tank (2), peristaltic pump (3), Bolt (4), motor (5), pulley shaft (6), bearing (7), big belt pulley (9), radius variable crank disc (10), installation cylinder The pin-and-hole (11) of pin, connecting rod (12), adjustment bar guide holder (13), adjustment bar (14), guide rail (15), for arranging loading device Loading hole (16), cantilever beam (17), piston ring fixture (18), piston ring test specimen (19), cylinder sleeve test specimen (20), pull pressure sensor (21), cylinder sleeve base (22), sensor stand (23) and measurement bar (32),
Two bearings (7) are abreast fixed on bottom plate (31) with bolt (4) relatively, and the both ends of pulley shaft (6) respectively can It is rotatably arranged on a bearing (7), big belt pulley (9) and radius variable crank disc (10) both of which pass through the respective center of circle It is arranged and is fixed on pulley shaft (6), radius variable crank disc (10) is provided with least three and is used to install straight pin The length of pin-and-hole (11), each pin-and-hole (11) and radius variable crank disc (10) circle center line connecting is all unequal;
Adjustment bar guide holder (13) and guide rail (15) are sequentially fixed on platform (24), one end connection radius variable of connecting rod (12) A pin-and-hole (11) on crank disc (10), the other end of connecting rod (12) are set in adjustment bar guide holder (13), cylinder sleeve base (22) slided on guide rail (15) and along guide rail (15), cylinder sleeve test specimen (20) is fixed on cylinder sleeve base (22), adjusts bar (14) one end is set in adjustment bar guide holder (13), and the other end of adjustment bar (14) is fixed on cylinder sleeve bottom by bolt (4) On seat (22), connected between guide holder (13) inside connecting rod (12) and adjustment bar (14) by bolt (4), the fixation of cantilever beam (17) End is fixed on platform (24), and the crossbeam of cantilever beam (17) is horizontally arranged on cylinder sleeve base (22), and cantilever beam (17) is provided with Loading device (16), piston ring fixture (18) are fixed on cantilever beam (17), and piston ring test specimen (19) is fixed on cylinder sleeve test specimen (20) on, piston ring test specimen (19) is set in piston ring fixture (18), and sensor stand (23) is fixed on cylinder sleeve base (22) On, pull pressure sensor (21) is fixed on sensor stand (23), one end connection pull pressure sensor of measurement bar (32) (21), the other end connection piston ring test specimen (19) of measurement bar (32);
Fuel tank (2) and peristaltic pump (3) are all fixed on bottom plate (31), and fuel tank (2) connects peristaltic pump (3) by lubricating oil pipe (1), Rubbing surface between the oil transportation mouth face piston ring fixture (18) and piston ring test specimen (19) of peristaltic pump (3), the casing of motor (5) It is fixed on by bolt (4) on bottom plate (31), the output shaft of motor (5) connects big belt pulley (9) by transmission mechanism.
2. the variable internal combustion engine cylinder jacket of reciprocating stroke as claimed in claim 1-piston-ring friction performance aircraft, it is special Sign is:
Described loading device is from the fixed block being connected on cantilever beam (17);
Make central projection to each pin-and-hole (11) using radius variable crank disc (10) center of circle as subpoint, each pin-and-hole (11) is can The subpoint become on radius crank disk (10) circumference is evenly distributed around radius variable crank disc (10) circumference;
Heater is provided with cylinder sleeve base (22).
CN201610128657.5A 2016-03-08 2016-03-08 The variable internal combustion engine cylinder jacket piston-ring friction performance aircraft of reciprocating stroke CN105628535B (en)

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