CN103048123A - Abrasion tester for cylinder sleeve-piston ring friction pair - Google Patents

Abrasion tester for cylinder sleeve-piston ring friction pair Download PDF

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Publication number
CN103048123A
CN103048123A CN2012105068872A CN201210506887A CN103048123A CN 103048123 A CN103048123 A CN 103048123A CN 2012105068872 A CN2012105068872 A CN 2012105068872A CN 201210506887 A CN201210506887 A CN 201210506887A CN 103048123 A CN103048123 A CN 103048123A
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CN
China
Prior art keywords
piston ring
sleeve
locating rack
locating
stage clip
Prior art date
Application number
CN2012105068872A
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Chinese (zh)
Inventor
梁兴雨
于晗正男
舒歌群
卫海桥
董立辉
王月森
杨康
田华
Original Assignee
天津大学
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Priority to CN2012105068872A priority Critical patent/CN103048123A/en
Publication of CN103048123A publication Critical patent/CN103048123A/en

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Abstract

The invention discloses an abrasion tester for a cylinder sleeve-piston ring friction pair. The structure of the abrasion tester is as follows: a cylinder sleeve is fixed between first and second positioning frames; an inner sleeve is arranged in an outer sleeve; the outer sleeve is connected with a pressure spring base through a thread; inner ends of a double annular elastic supporting rod are horizontally embedded in grooves of third and fourth positioning frames; a piston ring is arranged in the groove between fifth and sixth positioning frames; an outer diameter of the piston ring is glued to an inner wall of the cylinder sleeve; the inner surface of the piston ring is tightly pressed by the outer ends of the double annular elastic supporting rod; and four stretching force sensors are uniformly mounted between the second positioning frame and a screw carriage at intervals. In the abrasion tester, a piston ring radial loading mechanism is formed by four positioning frames and the double annular elastic supporting rod; a piston ring axial loading mechanism is formed by the pressure spring base and the pressure spring, so that the change condition of explosion pressure endured by the piston ring at practical work is simulated; and the abrasion tester provided by the invention can excellently simulate the practical working condition and has the advantages of short test period, low test cost, and the like.

Description

Cylinder Liner-piston Ring friction pair abrasion tester

Technical field

The invention belongs to the engine performance experimental provision, be specifically related to a kind of device that engine piston ring rubbing wear amount is tested.

Background technology

Cylinder sleeve and piston ring are one of most important friction pairs of engine, and its friction, lubrication performance directly has influence on dynamic property, emission performance and the fuel economy of engine, thus friction and the lubricating property of Cylinder Liner-piston Ring carried out experimental study, significant.

To the experiment of Cylinder Liner-piston Ring friction and wear behavior, mainly contain specimen test method, parts experimental analogic method, engine rig test method and installation service test method etc. at present.The specimen test method is that the specimen shape size that cylinder sleeve and piston ring cut into standard is carried out testing experiment at testing machine, and this method has that sample is simple, test parameters is easy to control, repeatability and good stability, the advantage such as testing expenses are cheap.But specimen test and engine actual operating mode differ too large, and simulation is poor.The engine rig test method is that Cylinder Liner-piston Ring is assembled in the engine pedestal, adopts fictitious load, carries out fire trial.Its advantage is that simulation is identical with reality, and the condition controllability is good, but the test period is long, and cost is high.Installation service test method is that test under the actual operating conditions is carried out in the piston ring installation, and advantage is to obtain identical working condition, but test period and experimentation cost increase greatly.Test unit provided by the invention belongs to the parts simulation test machine, can be good at simulating actual condition, and has short, the advantage such as experimentation cost is low of test period.

Summary of the invention

The purpose of this invention is to provide a kind of Cylinder Liner-piston Ring friction pair abrasion tester, by the horizontal engine piston ring is carried out radial loaded, load change between simulation cylinder sleeve and the piston ring detects its friction and greasy property, instructs pairing and the type selecting of cylinder sleeve-Piston Ring with this.

Technical scheme of the present invention is: Cylinder Liner-piston Ring friction pair abrasion tester comprises: cylinder sleeve, piston, piston ring, 6 locating racks, guide rail, inner sleeve, outer sleeve, stage clip pedestal, screw rod, stage clip, piezoelectric crystal, locating sleeve, Crossed Circle elastic fulcrum bar, screw bolt support, Hooks coupling universal coupling, regulating spring, tensile force sensor, cartridge heater, nut, temperature sensor, temperature controller and increment type footmark scramblers etc.Its parts form structure: cylinder sleeve is fixed between the first locating rack and the second locating rack, and first and second two locating racks are fixed on the slide block of guide rail.Inner sleeve places in the outer sleeve, and outer sleeve is connected with the stage clip pedestal by screw thread, and stage clip pedestal and guide rail are fixed.From the screw rod left end stage clip, piezoelectric crystal, locating sleeve, the 3rd locating rack, Crossed Circle elastic fulcrum bar, the 4th locating rack, cylinder sleeve and screw bolt support are housed successively, the right-hand member of screw rod links to each other with the piston of testing table by Hooks coupling universal coupling.The 5th locating rack one end places the inner sleeve outside; The other end is pressed close to inboard wall of cylinder liner, and the 6th locating rack one end penetrates screw rod; The other end is also pressed close to inboard wall of cylinder liner.Piston ring places in the groove between the 5th and the 6th locating rack, and the piston ring external diameter is affixed on inboard wall of cylinder liner, and the inside surface of piston ring is pressed in Crossed Circle elastic fulcrum bar outer end, and the inner edge of Crossed Circle elastic fulcrum bar crouches in the groove of the 3rd and the 4th locating rack.Between locating sleeve and the 3rd locating rack regulating spring is housed, 4 even intervals of tensile force sensor are installed between the second locating rack and the screw bolt support.In this device, by the 3rd, the 4th, the 5th, the 6th locating rack and Crossed Circle elastic fulcrum bar, consist of piston ring radial loaded mechanism; By stage clip pedestal, stage clip, inner sleeve, locating sleeve and regulating spring, consist of the axial load maintainer of piston ring.

The structure of this device mainly is comprised of five parts:

(1) power and kinematic train: the loading system of testing machine part is connected with piston on the testing table by screw rod, adopts motor that bent axle-linkage assembly and piston movement system are provided, and simulates adjustable continuously in 0 ~ 3000rpm scope of realization engine speed.Realize thus the linear reciprocating motion of piston load maintainer.

(2) loading system: by the 3rd, the 4th, the 5th, the 6th locating rack and Crossed Circle elastic fulcrum bar, consist of piston ring radial loaded mechanism; By stage clip pedestal, stage clip, inner sleeve, locating sleeve and regulating spring, consist of the axial load maintainer of piston ring.Do reciprocating linear motion in cylinder sleeve by two mechanisms, periodic compression discharges stage clip, change the axial load of piston ring with this, Crossed Circle elastic fulcrum bar by radial loaded mechanism changes axial load into radial load (for 3.5 times of axial load), and two loadings finally act on piston ring back.Simulate piston ring in the suffered explosion pressure situation of change of real work with this.This loading system also has the characteristics such as circumferential load is even, wearing and tearing after load auto-compensation simultaneously.

(3) test support system: adopt biserial ball line slideway support test unit, because its load-bearing capacity is strong, precision is high, thereby can effectively reduce the friction between the horizontal surface of contact of test portion, improve the accuracy of experimental data.

(4) temperature control system: adopt dissection type tubbiness well heater, fit tightly together with outer wall of cylinder jachet.Temperature sensor places between outer wall of cylinder jachet and the well heater inwall, and by the working temperature of temperature controller control cylinder sleeve, temperature range is 20 ~ 350 ℃.

(5) data acquisition system (DAS): adopt tensile force sensor, piezoelectric crystal (Quartz Force Sensor) and increment type footmark scrambler, be used for measuring suffered axial load (being converted into as calculated the radial load of piston ring) and the corner signal of friction force, regulating spring between Cylinder Liner-piston Ring.Adopt industrial computer to finish collection, processing, demonstration and the record of experimental data.Increment type footmark scrambler has 3 output signal A, B, Z.A, B are that bent axle whenever circles and produces 1000 square-wave signals.Can obtain corner signal accurately and judge the direction that bent axle rotates by two signals of A, B.Bent axle whenever circles and produces a z signal, and the z signal is referred to as crankshaft-synchronous signal (also being the top dead centre signal).

Advantage of the present invention and produce an effect:

(1) adopts the Cylinder Liner-piston Ring actual parts, test with the method for piston ring domain experiment, compare with aforementioned " specimen test method ", increased the reliability of test and the authenticity of data.

(2) testing machine rotating speed simulated engine actual speed, adjustable continuously in 0 ~ 3000r/min scope.

(3) discharge stage clip by periodic compression, change the axial load of piston ring, change into radial load by the Crossed Circle elastic fulcrum bar, accurately simulate piston ring in the suffered explosion pressure situation of change of real work.

(4) adopt dissection type tubbiness well heater, can accurately simulate the actual work temperature of cylinder sleeve, the experimental data that obtains is accurately credible.

(5) adopt piezoelectric crystal to measure the load heap(ed) capacity, accurately the situation of change of Real-Time Monitoring load maintainer axial load.

(6) corner signal of employing increment footmark scrambler acquisition test machine obtains accurately corner signal and crankshaft top dead center signal, accurately judges direction and position that bent axle rotates.

Description of drawings

Fig. 1 is that parts of the present invention form structure and fundamental diagram.

Fig. 2 is the principle assumption diagram of piston drive mechanism.

Embodiment

Below in conjunction with accompanying drawing and by embodiment structure of the present invention and principle are further elaborated.Need to prove that present embodiment is narrative, and infinite, do not limit the claimed scope of technical solution of the present invention with this.

Cylinder Liner-piston Ring friction pair abrasion tester, its concrete technical characterictic is: cylinder sleeve 1 is fixed between the first locating rack 2-1 and the second locating rack 2-2, and first and second two locating racks are fixed on the slide block of guide rail 3.Inner sleeve 4 places in the outer sleeve 5, and outer sleeve is connected with stage clip pedestal 6 by screw thread, and stage clip pedestal and guide rail are fixed.From screw rod 7 left ends stage clip 8, piezoelectric crystal 9, locating sleeve 10, the 3rd locating rack 2-3, Crossed Circle elastic fulcrum bar 11, the 4th locating rack 2-4, cylinder sleeve 1 and screw bolt support 12 are housed successively; The right-hand member of screw rod links to each other with the piston 14 of testing table by Hooks coupling universal coupling 13.The 5th locating rack 2-5 one end places the inner sleeve outside; The other end is pressed close to inboard wall of cylinder liner, and the 6th locating rack 2-6 one end penetrates screw rod; The other end is also pressed close to inboard wall of cylinder liner.Piston ring 15 places in the groove between the 5th and the 6th locating rack, and the piston ring external diameter is affixed on inboard wall of cylinder liner, and the inside surface of piston ring is pressed in Crossed Circle elastic fulcrum bar outer end, and the inner edge of Crossed Circle elastic fulcrum bar crouches in the groove of the 3rd and the 4th locating rack.In that being housed between locating sleeve and the 3rd locating rack, 16,4 tensile force sensors of regulating spring, 17 even intervals are installed between the second locating rack and the screw bolt support 12 (such as Fig. 1).By the 3rd, the 4th, the 5th, the 6th locating rack and Crossed Circle elastic fulcrum bar, consist of piston ring radial loaded mechanism; By stage clip pedestal, stage clip, inner sleeve, locating sleeve and regulating spring, consist of the axial load maintainer of piston ring.

The left end of stage clip and stage clip pedestal are fixed.The outer wall of cylinder sleeve is equipped with cartridge heater 18, is provided with temperature sensor between the outer wall of cylinder sleeve and cartridge heater inwall, by the working temperature of external temperature controller control cylinder sleeve.The motion of piston is driven by the mechanism that connecting rod 19, bent axle 20 and motor 21 form, and an end of bent axle is provided with increment type footmark scrambler 22(such as Fig. 2).The outer end of the outer end of the 4th locating rack and the 6th locating rack is equipped with fastening nuts.Screw bolt support is fixed on the guide rail by bolt.

First and second locating rack is used for the fastening of cylinder sleeve and installs; The the 3rd and the 4th locating rack is used for support and the location of Crossed Circle elastic fulcrum bar; The the 5th and the 6th locating rack is used for piston ring and installs and the location.

Screw diameter is 20mm.The internal diameter of piston ring is that 102mm, external diameter are 110mm, and thickness is 4mm.

Locating sleeve is threaded with inner sleeve, and locating sleeve thickness is 12mm.The inner sleeve external diameter is 66mm, and thickness is 4mm.The outer sleeve internal diameter is 60mm, and length is 215mm, and inner sleeve internal diameter and outer sleeve inwall are complementary.The external diameter of locating sleeve right end portion (thickness is 4mm) is 36mm, and with the assembling of regulating spring endoporus, the regulating spring internal diameter is 36mm, and external diameter is 71mm.

The 3rd support left-half external diameter is 36mm, cooperates with the regulating spring endoporus, and thickness is 4mm.The middle part external diameter is 46mm, and thickness is 5mm.The 3rd support right half part external diameter and the identical 28mm that is of the 4th support left-half external diameter match with Crossed Circle elastic fulcrum bar internal diameter.

The external diameter of Crossed Circle elastic fulcrum bar is 100mm, and internal diameter is 28mm, and thickness is 3mm, and the base angle is 30 °.

Axial force is measured by piezoelectric crystal (Quartz Force Sensor), and the effect of regulating spring is to make whole load maintainer that enough elasticity be arranged.4 tensile force sensors measuring friction force circumferentially are installed between the second locating rack and the screw bolt support uniformly by the bolt edge.

The radial force of charger acts on the piston ring by the Crossed Circle elastic fulcrum bar, makes piston ring produce pressure to cylinder sleeve.Stage clip pedestal and screw bolt support are bolted on the horizontal guide rail.After the installation, carry out level correction to whole test-bed.

At first by the tubbiness well heater cylinder sleeve is carried out preheating during experiment.After reaching predetermined temperature, open testing machine, under the driving of motor, the piston charger does reciprocating linear motion, periodic compression discharges stage clip, change the axial load of piston ring with this, the Crossed Circle elastic fulcrum bar by radial loaded mechanism changes axial load into radial load, and two loadings finally act on piston ring back.Simulate piston ring in the suffered explosion pressure situation of change of real work with this.In testing machine work, by tensile force sensor and footmark scrambler the friction force between the piston ring-cylinder liner and corner signal are carried out Real-time Collection, so that friction force situation of change under the different crank angles under actual condition between the sunykatuib analysis piston ring-cylinder liner.The data that collect are recorded in the computing machine.In experiment, the lubricating oil between the piston ring-cylinder liner is to supply with by the peristaltic pump of outside, and the per minute fuel delivery can realize that 10 ~ 250ml is adjustable continuously, to realize the simulation to the different operating modes such as weary oil, full immersion oil between the piston ring-cylinder liner.

Claims (6)

1. Cylinder Liner-piston Ring friction pair abrasion tester, comprise: cylinder sleeve, piston, piston ring, 6 locating racks, guide rail, inner sleeve, outer sleeve, the stage clip pedestal, screw rod, stage clip, piezoelectric crystal, locating sleeve, the Crossed Circle elastic fulcrum bar, screw bolt support, Hooks coupling universal coupling, regulating spring, the tensile force sensor, cartridge heater, nut, temperature sensor, temperature controller and increment type footmark scrambler, it is characterized in that: cylinder sleeve (1) is fixed between the first locating rack (2-1) and the second locating rack (2-2), first and second two locating racks are fixed on the slide block of guide rail (3), inner sleeve (4) places in the outer sleeve (5), outer sleeve is connected with stage clip pedestal (6) by screw thread, stage clip pedestal and guide rail are fixed, from screw rod (7) left end stage clip (8) is housed successively, piezoelectric crystal (9), locating sleeve (10), the 3rd locating rack (2-3), Crossed Circle elastic fulcrum bar (11), the 4th locating rack (2-4), cylinder sleeve (1) and screw bolt support (12), the right-hand member of screw rod links to each other with the piston (14) of testing table by Hooks coupling universal coupling (13), and the 5th locating rack (2-5) end places the inner sleeve outside; The other end is pressed close to inboard wall of cylinder liner, and the 6th locating rack (2-6) end penetrates screw rod; The other end is also pressed close to inboard wall of cylinder liner, piston ring (15) places in the groove between the 5th and the 6th locating rack, the piston ring external diameter is affixed on inboard wall of cylinder liner, the inside surface of piston ring is pressed in Crossed Circle elastic fulcrum bar outer end, the inner edge of Crossed Circle elastic fulcrum bar crouches in the groove of the 3rd and the 4th locating rack, regulating spring (16) is housed between locating sleeve and the 3rd locating rack, 4 tensile force sensors (17) evenly are installed between the second locating rack and the screw bolt support (12) at the interval, by the 3rd, the 4th, the 5th, the 6th locating rack and Crossed Circle elastic fulcrum bar, consist of piston ring radial loaded mechanism, by the stage clip pedestal, stage clip, inner sleeve, locating sleeve and regulating spring consist of the axial load maintainer of piston ring.
2. according to Cylinder Liner-piston Ring friction pair abrasion tester claimed in claim 1, it is characterized in that the left end of described stage clip (8) and stage clip pedestal (6) are fixing.
3. according to Cylinder Liner-piston Ring friction pair abrasion tester claimed in claim 1, the outer wall that it is characterized in that described cylinder sleeve (1) is equipped with cartridge heater (18), between the outer wall of cylinder sleeve and cartridge heater inwall, be provided with temperature sensor, by the working temperature of external temperature controller control cylinder sleeve.
4. according to Cylinder Liner-piston Ring friction pair abrasion tester claimed in claim 1, the motion that it is characterized in that described piston (14) is driven by the mechanism that connecting rod (19), bent axle (20) and motor (21) form, and an end of bent axle is provided with increment type footmark scrambler (22).
5. according to Cylinder Liner-piston Ring friction pair abrasion tester claimed in claim 1, it is characterized in that the outer end of described the 4th locating rack (2-4) and the outer end of the 6th locating rack are equipped with fastening nuts.Screw bolt support (12) is fixed on the described guide rail (3) by bolt.
6. according to Cylinder Liner-piston Ring friction pair abrasion tester claimed in claim 1, it is characterized in that described first and second locating rack (2-1,2-1) is used for the fastening of described cylinder sleeve (1) and installs; The the described the 3rd and the 4th locating rack (2-3,2-4) is used for support and the location of described Crossed Circle elastic fulcrum bar (11); The the described the 5th and the 6th locating rack (2-5,2-6) is used for described piston ring (15) and installs and the location.
CN2012105068872A 2012-11-30 2012-11-30 Abrasion tester for cylinder sleeve-piston ring friction pair CN103048123A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103884497A (en) * 2014-01-27 2014-06-25 中国北方发动机研究所(天津) Engine piston general fatigue test device
CN104006968A (en) * 2014-06-19 2014-08-27 合肥工业大学 Device and method for simulating crankshaft service state under radial impact load
CN104634682A (en) * 2015-01-15 2015-05-20 江苏师范大学 Cylinder sleeve piston ring friction pair abrasion test machine
CN104777001A (en) * 2015-04-01 2015-07-15 江苏师范大学 Vertical cylinder liner piston ring friction-wear test device
CN105628535A (en) * 2016-03-08 2016-06-01 同济大学 Internal combustion engine cylinder sleeve-piston ring friction performance testing machine with variable reciprocating stroke
CN105716979A (en) * 2016-02-04 2016-06-29 潍柴动力股份有限公司 Abrasion test device for cam and tappet friction pair
CN105842156A (en) * 2016-05-12 2016-08-10 哈尔滨工程大学 Continuous change type integral piston ring mechanical loading device
CN109085079A (en) * 2018-09-25 2018-12-25 合肥工业大学 A kind of multifunctional internal-combustion engine cylinder liner piston ring friction wear testing machine
CN109238714A (en) * 2018-10-18 2019-01-18 浙江大学 High-speed overload crankshaft-plain bearing unit dynamic test stand
CN110108585A (en) * 2019-04-24 2019-08-09 浙江大学 A kind of gas well annular space packing unit friction wear testing machine

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CN201335766Y (en) * 2008-12-16 2009-10-28 中国矿业大学 Frictional wear testing machine for cylinder sleeve and piston ring
CN102288502A (en) * 2011-05-13 2011-12-21 中国矿业大学 Variable-load cylinder-sleeve piston-ring frictional wear testing device

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US3861818A (en) * 1974-02-14 1975-01-21 Gen Electric Thrust wear detector
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CN1940523A (en) * 2006-09-26 2007-04-04 武汉理工大学 Friction-loss and vibration analog experimental equipment for main motion components of IC engine
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103884497A (en) * 2014-01-27 2014-06-25 中国北方发动机研究所(天津) Engine piston general fatigue test device
CN104006968A (en) * 2014-06-19 2014-08-27 合肥工业大学 Device and method for simulating crankshaft service state under radial impact load
CN104634682A (en) * 2015-01-15 2015-05-20 江苏师范大学 Cylinder sleeve piston ring friction pair abrasion test machine
CN104777001A (en) * 2015-04-01 2015-07-15 江苏师范大学 Vertical cylinder liner piston ring friction-wear test device
CN104777001B (en) * 2015-04-01 2017-12-29 江苏师范大学 A kind of vertical cylinder sleeve piston ring friction-wear test device
CN105716979A (en) * 2016-02-04 2016-06-29 潍柴动力股份有限公司 Abrasion test device for cam and tappet friction pair
CN105628535A (en) * 2016-03-08 2016-06-01 同济大学 Internal combustion engine cylinder sleeve-piston ring friction performance testing machine with variable reciprocating stroke
CN105628535B (en) * 2016-03-08 2017-12-12 同济大学 The variable internal combustion engine cylinder jacket piston-ring friction performance aircraft of reciprocating stroke
CN105842156A (en) * 2016-05-12 2016-08-10 哈尔滨工程大学 Continuous change type integral piston ring mechanical loading device
CN105842156B (en) * 2016-05-12 2018-07-24 哈尔滨工程大学 It is a kind of can consecutive variations piston ring domain machinery loading device
CN109085079A (en) * 2018-09-25 2018-12-25 合肥工业大学 A kind of multifunctional internal-combustion engine cylinder liner piston ring friction wear testing machine
CN109238714A (en) * 2018-10-18 2019-01-18 浙江大学 High-speed overload crankshaft-plain bearing unit dynamic test stand
CN110108585A (en) * 2019-04-24 2019-08-09 浙江大学 A kind of gas well annular space packing unit friction wear testing machine

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Application publication date: 20130417