CN102288502B - Variable-load cylinder-sleeve piston-ring frictional wear testing device - Google Patents
Variable-load cylinder-sleeve piston-ring frictional wear testing device Download PDFInfo
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- CN102288502B CN102288502B CN 201110122707 CN201110122707A CN102288502B CN 102288502 B CN102288502 B CN 102288502B CN 201110122707 CN201110122707 CN 201110122707 CN 201110122707 A CN201110122707 A CN 201110122707A CN 102288502 B CN102288502 B CN 102288502B
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Abstract
A variable-load cylinder-sleeve piston-ring frictional wear testing device is mainly composed of a main shaft motor, a guide rail, a sliding table, left and right uprights, a work table, a lever, a loading rod, a swing limiter, a load changer, an inner concave cambered-surface lower clamp and an outer convex cambered-surface upper clamp. An alternating force is generated by the load changer, and then is amplified by the lever to act on a test piece, thereby realizing radial loading of a piston ring to a cylinder sleeve; a variable load is measured in real time by a pressure sensor between the load changer and the lever; friction is measured by a foil gauge on the loading rod; the swing amplitude of the lever is reduced by the swing limiter; the loading rod comes into contact with the outer convex cambered-surface upper clamp through a ball pair to guarantee that the loading direction is vertically downward; the rotating speed of the motor is controlled by means of a program so as to carry out frictional wear tests at different speeds. The testing device is simple in structure, various in testing functions and high in accuracy.
Description
Technical field
The present invention relates to a kind of variable load cylinder sleeve piston ring friction-wear test device, be particularly useful for the test of the Cylinder Liner-piston Ring friction and wear behavior parameter of engine under different working conditions.
Background technology
Cylinder Liner-piston Ring is one of most important friction pair of engine, and the quality of its friction and wear behavior directly has influence on the usability of engine.Radial pressure between the Cylinder Liner-piston Ring directly has influence on its friction and wear behavior.For cylinder sleeve of engine-Piston Ring, its radial pressure is the periodicity continually varying in the piston ring reciprocating stroke.Pressure curve is horizontal wire in air-breathing, out stroke, be parabolic shape in compression and expansion stroke, and rising first descends afterwards.So one of difficult point of cylinder sleeve of engine-piston ring friction wear testing machine development is how to simulate piston ring continually varying radial load in reciprocating stroke, can measure again the size of this load.Number of patent application is 89221934.3 disclosed a kind of radial loaded devices of simulating piston ring, the permanent quality elasticity loading system that employing is comprised of connecting link, compact heap, axle, loading nut and spring leaf, load nut to the size of spring leaf axial force by regulating, reach the size of regulating piston ring force in radial; Number of patent application is 200720105146 disclosed a kind of radial loaded devices of simulating piston ring, is to utilize loading bolt and interior outer expanding sleeve to realize domain radial loaded; Number of patent application is 200820237523 disclosed a kind of radial loaded devices of simulating piston ring, and the piston ring radial loaded device that adopts loading nut, screw rod, inner conical drogue and external conical sleeve to consist of carries out radial loaded to piston ring and measures the size of the strain load that Real-Time Monitoring adds of screw rod by foil gauge; Also have by lever the Cylinder Liner-piston Ring test specimen is loaded, hang counterweight and regulate load etc.These chargers respectively have its relative merits, and first three plants the experiment of the use domain, install simply, but regulate comparatively complexity and larger to the load measurement difficulty of load; Rear a kind of magnitude of load can directly be read by counterbalance mass, but the teeter of lever affects accuracy of measurement results.Existing Cylinder Liner-piston Ring friction wear testing machine all can carry out real-time measurement to the friction force between the Cylinder Liner-piston Ring, can realize radial loaded within the specific limits, but can not realize that for single test load changes continuously, can only under the load of setting up, test, to the generation of alternate load with measure and to realize.
Summary of the invention
Technical matters: the objective of the invention is to overcome the weak point in the prior art, provide a kind of simple and compact for structure, measure accurately, can simulated condition the variable load cylinder liner piston ring friction wear testing machine of alternate load radially.
Technical scheme: variable load cylinder liner piston ring friction wear testing machine of the present invention, comprise worktable, be located at the guide rail on the worktable, slide unit, left column, right column, left and right pillar is provided with lever, lever is provided with the counterweight hook and is located at the counterweight that counterweight is linked up with, one side of slide unit is provided with connecting rod, the outer end of connecting rod is connected with crankshaft disk, the crankshaft disk warp beam links to each other with spindle motor in being located at worktable, promoting slide unit by connecting rod moves reciprocatingly at guide rail, described slide unit is provided with the reciprocating inner concave arc surface lower clamp of slide unit, lever is provided with anchor clamps on the actionless outer convex globoidal that matches with the inner concave arc surface lower clamp, be hinged with the load bar that is fixed on the lever on the outer convex globoidal on the anchor clamps, load bar is provided with the foil gauge of testing friction power; Be provided with the variable load device that is positioned at the lever end top in the described right column, and be provided with the limit pendulum device that is positioned at the lever end both sides, be connected with the variable load device motor that is fixed on the right column outside on the line shaft of variable load device.
Described inner concave arc surface lower clamp comprises the lower clamp body, is fixed on cylinder sleeve test specimen on the lower clamp body through clamping screw, and the bottom of cylinder sleeve test specimen is provided with heating tube and intersects a plurality of thermopairs of row with heating tube; Anchor clamps comprise the upper clamp body that has ball recess on it on the described outer convex globoidal, the bottom interval of upper clamp body is provided with left, center, right three arc piston rings test specimen, arc piston ring test specimen one side that is arranged on the middle part is arranged with the piston ring holding screw, and the arc piston ring test specimen that is arranged on the left and right sides is respectively equipped with through the fixing piston ring latch segment of piston ring clamping screw; Described variable load device comprises variable load device casing, be located at variable load device axle in the variable load device casing, be fixed on the cam on the variable load device axle and be located at the driven guide rod of T shape cam under the cam, and the lower end of the driven guide rod of T shape cam is connected with the spring guide that is sleeved on the spring guide pillar and is located at spring on the spring guide.Described limit pendulum device by limit pendulum device seat, be fixed on limit pendulum device axle on the limit pendulum device seat, be located at the limit pendulum device bearing that the restriction lever cross swings on the limit pendulum device axle and consist of.
Beneficial effect: owing to having adopted technique scheme, have following advantage:
1. the cam-type variable load device that adopts can produce alternate load, quantitatively loads and the lever amplification effect in conjunction with counterweight, has increased the scope of variable load, can simulate more accurately the radial load under the Cylinder Liner-piston Ring actual condition;
2. utilize load bar to pass through the ball pair and contact with anchor clamps on the outer convex globoidal, guaranteed loading direction straight down, make it not be subjected to the impact of rigging error and load bar distortion;
3. the limit pendulum device that utilizes deep groove ball bearing to make has reduced the lever amplitude of oscillation, does not affect the size of loading force simultaneously, and machine is operated steadily, and measurement parameter is more accurate;
4. measure the size that the slight curves deflection that is produced by friction force records friction force by the foil gauge that is attached on the load bar, measurement result is more accurate;
5. lift lever by the unloading bolt, make and install or take out test specimen, more convenient to operate;
6. utilize accurately control step motor speed of program, to change the speed of related movement of friction pair; Can accelerate, the friction-wear test under the deceleration, constant speed isovel, the variable load cycle can be regulated by the rotating speed of variable load device motor;
7. device structure is simple, test function is various, precision is high, convenient operation.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is that main TV structure figure amplifies in variable load general ability of the present invention section.
Fig. 3 is the variable load general ability Zoom Side TV structure figure of section of the present invention.
Fig. 4 is inner concave arc surface lower clamp structural drawing of the present invention.
Fig. 5 is anchor clamps master TV structure figure on the outer convex globoidal evagination cambered surface of the present invention.
Fig. 6 is chuck side TV structure figure on the outer convex globoidal evagination cambered surface of the present invention.
Among the figure: the 1-spindle motor; The 2-guide rail; The 3-slide unit; The 4-left column; The 5-worktable; The 6-bearing pin; The 7-lever; The 8-foil gauge; The 9-load bar; 10-limit pendulum device; 10-1-limit pendulum device seat; 10-2-limit pendulum device bearing; 10-3-pendulum device axle; 11-variable load device; The 11-1-spring guide pillar; The 11-2-spring; The driven guide rod of 11-3-T shape cam; The 11-4-cam; The 11-5-key; The 11-6-deep groove ball bearing; 11-7-variable load device left end cap; 11-8-cam holding screw; 11-9-variable load device loam cake; 11-10-variable load device axle; The 11-11-lip-type packing; 11-12-variable load device right end cap; 11-13-O shape circle; The 11-14-spring guide; The 11-15 pressure transducer; 11-16-variable load device casing; 12-variable load device motor; The 13-right column; 14-counterweight hook; The 15-counterweight; The 16-connecting rod; The 17-crankshaft disk; 18-inner concave arc surface lower clamp; 18-1-lower clamp body; 18-2-cylinder sleeve test specimen; The 18-3-clamping screw; The 18-4-heating tube; The 18-5-thermopair; Anchor clamps on the outer convex globoidal of 19-; The upper clamp body of 19-1; 19-2-piston ring clamping screw; 19-3-piston ring test specimen; 19-4-piston ring holding screw; 19-5 piston ring latch segment; 19-6 piston ring set nut; 20-unloads bolt; 21-unloads nut.
Embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
As shown in Figure 1, variable load cylinder liner piston ring friction wear testing machine mainly is made of anchor clamps 19 on spindle motor 1, guide rail 2, slide unit 3, left column 4, worktable 5, lever 7, load bar 9, limit pendulum device 10, variable load device 11, variable load device motor 12, right column 13, inner concave arc surface lower clamp 18, the outer convex globoidal.Guide rail 2, slide unit 3, left column 4, right column 13 are located on the worktable 5, and spindle motor 1 is located in the worktable 5; Lever 7 is located on the left and right pillar, lever 7 is provided with counterweight hook 14 and is located at the counterweight 15 that counterweight is linked up with, one side of slide unit 3 is provided with connecting rod 16, the outer end of connecting rod 16 is connected with crankshaft disk 17, crankshaft disk 17 warp beams link to each other with spindle motor 1 in being located at worktable 5, promoting slide unit 3 by connecting rod 16 moves reciprocatingly at guide rail 2, bearing pin 6 is the fulcrum of lever 7, load bar 9 is fixed in apart from bearing pin 160mm place, counterweight hook 14 is hung on apart from bearing pin 320mm place, variable load device 10 is fixed on apart from bearing pin 480mm place, amplifies loading force by lever 7.Alternate load and decide load and act on anchor clamps 19 ball-and-sockets on the outer convex globoidal by load bar 9 terminal bulbs finally is delivered to the cylinder liner piston ring friction pair.Spindle motor 1 driving crank dish 17 rotates, and links to each other slide unit to-and-fro movement on guide rail 2 with slide unit 3 by connecting rod 16, inner concave arc surface lower clamp 18 is fixed on the slide unit, with the slide unit to-and-fro movement, anchor clamps 19 are static on the outer convex globoidal, make cylinder sleeve and the mutual friction of piston ring phase.Slide unit 3 is provided with the reciprocating inner concave arc surface lower clamp 18 of slide unit, inner concave arc surface lower clamp 18 comprises lower clamp body 18-1, is fixed on cylinder sleeve test specimen 18-2 on the lower clamp body 18-1 through clamping screw 18-3, the bottom of cylinder sleeve test specimen 18-2 be provided with heating tube 18-4 and with a plurality of thermopair 18-5 of heating tube 18-4 cross arrangement, as shown in Figure 4, cylinder sleeve test specimen 18-2 is put into the locating slot of inner concave arc surface lower clamp 18 and use the hexagon socket head cap screw 18-3 of three M3 to lock.Heating tube 18-4 is installed on cylinder sleeve test specimen below, and three thermopair 18-5 are installed on respectively top dead centre, mid point, lower dead center place and measure in real time heating-up temperature, will record signal feedback to temperature controller heating-up temperature is carried out fine adjustment.Lever 7 is provided with anchor clamps 19 on the actionless outer convex globoidal that matches with inner concave arc surface lower clamp 18, anchor clamps 19 comprise the upper clamp body 19-1 that has ball recess on it on the outer convex globoidal, the bottom interval of upper clamp body 19-1 is provided with left, center, right three arc piston rings test specimen 19-3, arc piston ring test specimen one side that is arranged on the middle part is arranged with piston ring holding screw 19-4, the arc piston ring test specimen that is arranged on the left and right sides is respectively equipped with the fixing piston ring latch segment 19-5 through piston ring clamping screw 19-2, shown in Figure 6 such as Fig. 5, the piston ring test specimen is put into the draw-in groove of anchor clamps 19 on the outer convex globoidal, put into first adapter ring, use piston ring holding screw 19-4 to fix, put into again first and the 3rd road piston ring and use piston ring clamping screw 19-2, piston ring set nut 19-6 and piston ring latch segment 19-5 locking.If carrying out two ring frictional wear experiments then puts it in the groove of the left and right sides and locking.Anchor clamps 19 top ball-and-sockets match with load bar 9 bulbs on the outer convex globoidal, guarantee loading direction straight down.Be hinged with the load bar 9 that is fixed on the lever 7 on the outer convex globoidal on the anchor clamps 19, load bar 9 is provided with the foil gauge 8 of measuring friction force; Be provided with the variable load device 11 that is positioned at top, lever 7 ends in the described right column 13, and be provided with the limit pendulum device 10 that is positioned at both sides, lever 7 end, be connected with the variable load device motor 12 that is fixed on right column 13 outsides on the line shaft of variable load device 11.Variable load device 11 mainly is made of cam drive and coupled pressure transducer, shown in Figure 3 such as Fig. 2, cam drive mainly by variable load device casing 11-16, be located at variable load device axle 11-10 in the variable load device casing 11-16, be fixed on the cam 11-4 on the variable load device axle 11-10 and the driven guide rod 11-3 of T shape cam that is located under the cam 11-4 consists of; Cam 11-4 is fixed on the camshaft 11-10 by cam holding screw 11-8 and the shaft shoulder.Variable load device motor 12 rotates through camshaft 11-10, key 11-5 band moving cam 11-4.Variable load device left end cap 11-7 and variable load device right end cap 11-12 are in order to fixing variable load device bearing 11-6, and variable load device axle 11-10 is supported by variable load device bearing 11-6.Be fixed on that variable load device casing 11-16 fixes on the variable load device casing, the driven guide rod 11-3 of T shape cam is through orienting sleeve 11-14 periodic compression spring 11-2, spring force acts on the lever 7 through spring guide pillar 11-1, pressure transducer 11-15, but power is carried in the quantitative change of pressure transducer Real-time Measuring.Fill the solid lubrication grease among the variable load device casing 11-16 and lip-type packing 11-11 is installed and O-ring seals 11-13.Limit pendulum device bearing 11-10 is installed in lever 7 left and right sides, contacts with it, in order to reduce the lever cross vibration, improves measuring accuracy.Unloading nut 21 is welded on the right column 13, uses spanner will unload on the bolt 20 before the test and revolves, and the jack-up lever makes the ball-and-socket of anchor clamps 19 on the outer convex globoidal of bulb disengaging of load bar 9, takes off that anchor clamps are installed to test specimen on the outer convex globoidal; During test the bolt backspin is made it not contact with lever 7; Take off according to the method described above anchor clamps 19 and test specimen on the outer convex globoidal after the test, will unload the bolt spin-up to the setting height support lever, avoid load bar 9 to contact with inner concave arc surface lower clamp 18.Limit pendulum device 10 by limit pendulum device seat 10-1, be fixed on limit pendulum device axle 10-3 on the limit pendulum device seat 10-1, the limit pendulum device bearing 10-2 that is located at 7 teeters of the upper restriction of limit pendulum device axle 10-3 lever consists of, as shown in Figure 3.
Claims (3)
1. variable load cylinder liner piston ring friction wear testing machine, comprise worktable (5), be located at the guide rail (2) on the worktable (5), slide unit (3), left column (4), right column (13), left and right pillar is provided with lever (7), lever (7) is provided with counterweight hook (14) and is located at the counterweight (15) that counterweight is linked up with, one side of slide unit (3) is provided with connecting rod (16), the outer end of connecting rod (16) is connected with crankshaft disk (17), crankshaft disk (17) the warp beam spindle motor (1) interior with being located at worktable (5) links to each other, promoting slide unit (3) by connecting rod (16) moves reciprocatingly at guide rail (2), it is characterized in that: described slide unit (3) is provided with the reciprocating inner concave arc surface lower clamp of slide unit (18), lever (7) is provided with anchor clamps (19) on the actionless outer convex globoidal that matches with inner concave arc surface lower clamp (18), be hinged with the load bar (9) that is fixed on the lever (7) on the anchor clamps on the outer convex globoidal (19), load bar (9) is provided with the foil gauge (8) of testing friction power; Be provided with the variable load device (11) that is positioned at top, lever (7) end in the described right column (13), and be provided with the limit pendulum device (10) that is positioned at lever (7) both sides, end, be connected with the variable load device motor (12) that is fixed on right column (13) outside on the variable load device axle of variable load device (11);
Described variable load device (11) comprises variable load device casing (11-16), be located at variable load device axle (11-10) in the variable load device casing (11-16), be fixed on the cam (11-4) on the variable load device axle (11-10) and be located at the driven guide rod of T shape cam (11-3) under the cam (11-4), and the lower end of the driven guide rod of T shape cam (11-3) is connected with the spring guide (11-14) that is sleeved on the spring guide pillar (11-1) and is located at spring (11-2) on the spring guide (11-14);
Described limit is put device (10) and is put device axle (10-3), is located at and limits the limit of the upper restriction of pendulum device axle (10-3) lever (7) teeter to put device bearing (10-2) formation by the limit of limitting pendulum device seat (10-1), be fixed on the limit pendulum device seat (10-1).
2. variable load cylinder liner piston ring friction wear testing machine according to claim 1, it is characterized in that: described inner concave arc surface lower clamp (18) comprises lower clamp body (18-1), is fixed on cylinder sleeve test specimen (18-2) on the lower clamp body (18-1) through clamping screw (18-3), the bottom of cylinder sleeve test specimen (18-2) be provided with heating tube (18-4) and with heating tube (18-4) a plurality of thermopairs (18-5) of cross arrangement in length and breadth.
3. variable load cylinder liner piston ring friction wear testing machine according to claim 1, it is characterized in that: anchor clamps (19) comprise the upper clamp body (19-1) that has ball recess on it on the described outer convex globoidal, the bottom interval of upper clamp body (19-1) is provided with left, center, right three arc piston rings test specimen (19-3), arc piston ring test specimen one side that is arranged on the middle part is arranged with piston ring holding screw (19-4), and the arc piston ring test specimen that is arranged on the left and right sides is respectively equipped with through the fixing piston ring latch segment (19-5) of piston ring clamping screw (19-2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110122707 CN102288502B (en) | 2011-05-13 | 2011-05-13 | Variable-load cylinder-sleeve piston-ring frictional wear testing device |
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| CN 201110122707 CN102288502B (en) | 2011-05-13 | 2011-05-13 | Variable-load cylinder-sleeve piston-ring frictional wear testing device |
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| CN102288502A CN102288502A (en) | 2011-12-21 |
| CN102288502B true CN102288502B (en) | 2013-02-13 |
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| CN106769579A (en) * | 2016-12-13 | 2017-05-31 | 李霞林 | A kind of small friction abrasion tester |
| CN106769579B (en) * | 2016-12-13 | 2019-04-09 | 李霞林 | A kind of small friction abrasion tester |
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| CN102288502A (en) | 2011-12-21 |
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