CN107677558A - A kind of piston ring radial section torsional rigidity test device and method - Google Patents
A kind of piston ring radial section torsional rigidity test device and method Download PDFInfo
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- CN107677558A CN107677558A CN201710783442.1A CN201710783442A CN107677558A CN 107677558 A CN107677558 A CN 107677558A CN 201710783442 A CN201710783442 A CN 201710783442A CN 107677558 A CN107677558 A CN 107677558A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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Abstract
The invention belongs to field of power machinery, specifically provides a kind of piston ring radial section torsional rigidity test device, including：Piston ring, pedestal, laminate, force snesor, loading handle, leveling swing rod, vertical, displacement measurement swing rod, the first displacement transducer and second displacement sensor；Fluted on pedestal, there is center stand column at base recess center；The center stand column is from top to bottom sequentially installed with loading handle, force snesor and laminate；Piston ring is installed between laminate side and base recess inwall, and piston ring circle circumferential cross-section is vertical with center stand column；Chuck top is provided with connecting rod, and leveling swing rod, displacement measurement swing rod are installed on connecting rod；First displacement transducer is installed between displacement measurement swing rod and laminate upper surface；The second displacement sensor is installed between laminate side and base recess inwall.The present invention considers the deformation of piston ring radial section, and piston ring torque rating precision is high, can obtain the torsional rigidity of accurate piston ring radial section.
Description
Technical field
The present invention relates to the piston ring in dynamic field, and in particular to a kind of piston ring radial section torsional rigidity test dress
Put, further relate to a kind of piston ring radial section torsional rigidity method of testing.
Background technology
Motion of the piston ring in annular groove is extremely complex, wherein having axial reciprocating, rotating in a circumferential direction, the torsion around circumferential cross-section
It is bent.Due to the difference of the adjacent annular groove of piston ring and the gas pressure of ring bank, piston ring section can produce torsional deformation, Jin Erhui
Produce twisting stress.Piston ring can make piston ring produce fatigue and then damage around the twist motion of radial section, additionally can be right
The air-tightness of piston ring has an impact, so the calculating analysis to plug ring twist motion is quite important.The torsional rigidity of piston ring
It is the underlying parameter of piston Ring Dynamics and marine hydrostatic calculation analysis, testing the torsional rigidity of piston ring has deep engineering
Meaning.The technical problem to be solved in the present invention is to determine the radial section torsional rigidity of piston ring.
Existing piston ring radial section torsional rigidity is based on assuming that piston ring section is ideal rectangle, is cut based on rectangle
The torsional rigidity calculation formula in face is calculated.Typical document is:Tao He and et al.Thermomechanical
Fatigue Life Prediction for a Marine Diesel Engine Piston considering Ring
Dynamics.Advances in Mechanical Engineering,2014.However, the radial section of actual upper piston ring
It is not preferable rectangle, and the material of piston ring in itself is also and non-isotropy, piston ring can produce small in contact site
Local deformation.These factors cause existing piston ring radial section torsional rigidity result of calculation certain error to be present.
Due to piston ring twist motion calculate it is complex, most of scholar when studying piston ring mechanical property mostly
The twist motion of piston ring is not considered.In addition, the application of piston ring moment of torsion and torsional angle are also difficult to accurately measure.
The content of the invention
It is an object of the invention to provide one kind can accurately measure piston ring moment of torsion and torsional angle, the higher piston ring of precision
Radial section torsional rigidity test device.The present invention also aims to provide a kind of piston ring radial section torsional rigidity to survey
Method for testing.
A kind of piston ring radial section torsional rigidity test device of the present invention, including：Piston ring, pedestal, laminate, power pass
Sensor, loading handle, leveling swing rod, vertical, displacement measurement swing rod, the first displacement transducer and second displacement sensor；
Fluted on pedestal, base recess inwall is annular slope, and there is a center stand column at base recess center, center stand column with
Pedestal is connected；The center stand column is from top to bottom sequentially installed with loading handle, force snesor and laminate；Described laminate side
Face is annular slope；Piston ring is installed between laminate side and base recess inwall, and piston ring circle circumferential cross-section is stood with center
Post is vertical；
Pedestal side top is provided with connecting rod, and leveling swing rod, displacement measurement swing rod are installed on connecting rod；Leveling swing rod and vertical
Connection；First displacement transducer is installed between displacement measurement swing rod and laminate upper surface, and is put perpendicular to displacement measurement
Bar and laminate upper surface；The second displacement sensor is installed between laminate side and base recess inwall, and perpendicular to pressure
Body side surface and base recess inwall；
The present invention can also include：
1. scribble rough coatings on the base recess inwall.
2. there is pad between the loading handle and force snesor.
3. base bottom has symmetrical 4 mounting holes.
A kind of piston ring radial section torsional rigidity method of testing of the present invention, comprises the following steps：
Step 1 ring installations, laminate is set to be contacted with piston ring surface by rotating loading handle；Adjust the first displacement
Sensor is to perpendicular to displacement measurement swing rod and laminate upper surface location, and regulation second displacement sensor is to perpendicular to laminate side
Face and base recess inner wall position；
Step 2 records the first displacement transducer registration x1, record second displacement sensor registration h0, force snesor shows
Number f1；
Step 3 rotation loading spanners carry out first time loading, record the first displacement transducer registration x2, force snesor
Registration f2；
Step 4 rotation loading spanners carry out second and loaded, and record the first displacement transducer registration x3, force snesor
Registration f3；
Step 5 calculates piston ring torsional angle ∠ a and the ∠ b after loading for the first time, second of loading respectively；
In formula, p is the circumferential height of piston ring, and q is the width in piston ring section；M is second displacement sensor due to certainly
Body size is relative to the compensation displacement of laminate border and base recess inwall, column and second displacement sensor institute centered on ∠ d
Angle between vertical line.
Step 6 calculates the piston ring moment of torsion M after loading for the first time, second of loading respectively1、M2；
∠ c are ring compression suffered by laminate and angle formed by horizontal direction；D is piston ring internal diameter, and T0 is piston ring gap.
Step 7 calculates piston ring radial section torsional rigidity K
One~step 7 of step 8 repeat steps 3~5 times, then the average value of piston ring radial section torsional rigidity is asked for,
Finally give piston ring radial section torsional rigidity test result.
The present invention has the advantages that：
1. apparatus of the present invention move down extruding pad by central handle rotation, pad passes through laminate extrusion piston ring
Inner side coboundary.Piston ring then rotates using the lower boundary in outside as fulcrum around inner side.Pass through pad and middle force snesor
Measurement obtain laminate by compressive load.The torque precision that piston ring is calculated from there through geometrical relationship is high.
2. it can test to obtain the displacement moved down of laminate by the first displacement transducer.Rough coatings lift pedestal
The fixed effect of groove test section, piston ring outer boundaries are not likely to produce slip.
Initial time can be obtained by second displacement sensor, the border presented a theatrical performance as the last item on a programme and the distance of base recess inwall.Knot
The geometry calculation formula of the test device is closed, can be accurately obtained in piston ring and survey rotation of the coboundary around outside lower fulcrum
Gyration.
3. the present invention is easy to repeatedly be tested, by being counted to the moment of torsion and torsional angle that are obtained by multiple test
Analysis, you can obtain the torsional rigidity of accurate piston ring radial section.
4. present invention loading is convenient, testing efficiency is high；Accuracy of data acquisition is high；It is simple in construction, it is easy to manufacture；Suitable for more
Kind piston ring section, it is applied widely.
Brief description of the drawings
Fig. 1 is apparatus of the present invention overall schematic；
Fig. 2 is piston ring section torsional deflection schematic diagram.
Embodiment
The device is specifically described with reference to Fig. 1~Fig. 2.A kind of piston ring radial section torsional rigidity test
Device.
The object of the present invention is achieved like this, including：Piston ring 6, pedestal 8, laminate 5, force snesor 4, loading handle
3rd, leveling swing rod 10, vertical 11, displacement measurement swing rod 12, the first displacement transducer 13 and second displacement sensor 14；
Fluted on pedestal 8, base recess inwall has center stand column 1 for circumferentially symmetrical inclined-plane, base recess center,
Center stand column 1 is connected with pedestal 8；The center stand column 2 is from top to bottom sequentially installed with loading handle 3, force snesor 4 and pressure
Body 5；The described side of laminate 5 is circumferentially symmetrical inclined-plane；Piston ring 6 be installed on laminate side and base recess inwall it
Between, piston ring circle circumferential cross-section is vertical with center stand column 1；
Pedestal side top is provided with connecting rod, and leveling swing rod 10, displacement measurement swing rod 12 are installed on connecting rod；Leveling swing rod with
Vertical 11 connects；First displacement transducer 13 is installed between displacement measurement swing rod 12 and the upper surface of laminate 5；Described
Two displacement transducers 14 are installed between laminate side and base recess inwall；
Rough coatings 7 are scribbled on the base recess inwall.
There is pad 2 between the loading handle and force snesor.
Base bottom has symmetrical 4 mounting holes 9.
Pedestal 8 is rigidly mounted on a horizontal basic plane by 4 mounting holes of surrounding.Piston ring 6 is horizontal
It is positioned in the groove of pedestal 8, piston ring is positioned over the region of rough coatings 7, rotation leveling swing rod 10, by above
Whether vertical 11 detects top surface of piston ring horizontal, as unhorizontal, is adjusted.Then laminate 5 is passed through under center stand column 1
Move and piston ring 6 contacts.Then pass through center stand column and force snesor 4 is installed successively, pad 2, load handle 3.Rotation loading handle
Hand 3 makes piston ring and laminate fully contact,；There is screw thread in the center stand column 1, by further rotating loading handle 3 to work
Plug ring 6 realizes loading.
Torsional rigidity calculation formula according to square-section in the prior art, i.e. formula (1) are turned round to the square-section of piston ring
Turn stiffness KrtCalculated.
In formula：D is the external diameter of piston ring；D is the internal diameter of piston ring；E is the modulus of elasticity of piston ring；B is piston ring
Axial height.
It is preferable rectangle that the section of actual upper piston ring, which is not, and the material of piston ring in itself is not each to same yet in addition
Property, while piston ring can produce small local deformation in contact site.These factors make result of calculation meeting and the reality of the formula
The torsional rigidity on border has a certain distance.
The method and step that the test of piston ring radial section torsional rigidity is carried out using apparatus of the present invention is：Swing offset measures
The position of swing rod 12 and the first displacement transducer 13 of regulation on displacement measurement swing rod makes corresponding with transducer receivers.Start
Test, record the first displacement transducer 13 registration x1, it is h similarly to adjust second displacement sensor 14 and record its registration0, power biography
The registration f of sensor 41.Loading spanner 3 is turned over into certain angle to be loaded, record the first displacement transducer 13 registration x2, power
The registration f of sensor 42；Then operation above is repeated by identical method and obtains x3,f3。
As shown in Figure 2, the diagonal AB in piston ring section arrives separately at AE, AG position by loading twice, there is AB=
AE=AG.Torsional angle after wherein ∠ a, ∠ b respectively loadings twice.S is obtained by formula (2) and formula (3)1、S2。
S1=x2-x1 (2)
S2=x3-x2 (3)
By the circumferential height p of the piston ring and width q in section, by formula (3) can obtain piston ring it is cornerwise away from
From AB.
BC, ED, GF length are obtained by formula (4), (5), (6) respectively, wherein m is second displacement sensor due to itself
Size is relative to the compensation displacement of loading laminate border and base recess inwall, column and second displacement sensor centered on ∠ d
Angle between the vertical line of place.
BC=h0+m (5)
ED=BC-S1·cos(∠d) (6)
GF=ED-S2·cos(∠d) (7)
Corresponding ∠ BAC, ∠ EAD, ∠ GAF are obtained by formula (8), (9), (10)
∠ BAC=arcsin (BC/AB) (8)
∠ EAD=arcsin (ED/AB) (9)
∠ GAF=arcsin (GF/AB) (10)
Then corresponding torsional angle ∠ a, ∠ b are obtained by formula (11), (12)
∠ a=∠ BAC- ∠ EAD (11)
∠ b=∠ BAC- ∠ GAF (12)
Then corresponding moment of torsion M1, M2 are obtained by piston ring by the registration of power sensing and the dimensional parameters of related structure
Footpath D, piston ring gap T0 obtain the circumferential length L of piston ring by formula (11).
L=π D-T0 (13)
The arm of force long AD, AF that piston ring is located at AE, AG are obtained by formula (14), (15)
Formula (16), (17) respectively obtain the torque M that piston ring is located at AE, AG1、M2.∠ c be ring compression suffered by laminate with
Angle formed by horizontal direction, and ∠ c+ ∠ d=90 °.
Corresponding torsional rigidity K is finally obtained by formula (18)
3-5 times is tested respectively using same method and then tries to achieve corresponding average value, that is, has been obtained corresponding to piston ring
Torsional rigidity.Person skilled in art can use other embodiments under the objective without prejudice to the invention.
Claims (6)
1. a kind of piston ring radial section torsional rigidity test device, including：Piston ring, pedestal, laminate, force snesor, loading
Handle, leveling swing rod, vertical, displacement measurement swing rod, the first displacement transducer and second displacement sensor；It is characterized in that pedestal
Upper fluted, base recess inwall is annular slope, and there is center stand column at base recess center, and center stand column is fixedly connected with the base；Institute
State center stand column and be from top to bottom sequentially installed with loading handle, force snesor and laminate；Described laminate side is annular slope；
Piston ring is installed between laminate side and base recess inwall, and piston ring circle circumferential cross-section is vertical with center stand column；
Chuck top is provided with connecting rod, and leveling swing rod, displacement measurement swing rod are installed on connecting rod；Leveling swing rod is connected with vertical；Institute
The first displacement transducer is stated to be installed between displacement measurement swing rod and laminate upper surface, and perpendicular to displacement measurement swing rod and laminate
Upper surface；The second displacement sensor is installed between laminate side and base recess inwall, and perpendicular to laminate side and
Base recess inwall.
2. a kind of piston ring radial section torsional rigidity test device as claimed in claim 1, it is characterized in that, the pedestal is recessed
Rough coatings are scribbled on groove inwall.
3. a kind of piston ring radial section torsional rigidity test device as claimed in claim 1 or 2, it is characterized in that, it is described to add
Carrying between handle and force snesor has pad.
4. a kind of piston ring radial section torsional rigidity test device as claimed in claim 1 or 2, it is characterized in that, the base
Symmetrical 4 mounting holes are arranged at seat bottom.
5. a kind of piston ring radial section torsional rigidity test device as claimed in claim 3, it is characterized in that, the pedestal bottom
There are symmetrical 4 mounting holes in portion.
A kind of 6. piston ring radial section torsional rigidity method of testing using claim 1 described device, it is characterised in that bag
Include following steps：
Step 1 ring installations, laminate is set to be contacted with piston ring surface by rotating loading handle；Adjust the first displacement sensing
Device is to perpendicular to displacement measurement swing rod and laminate upper surface location, and regulation second displacement sensor is to perpendicular to laminate side and base
Seat groove inner wall position；
Step 2 records the first displacement transducer registration x1, record second displacement sensor registration h0, the registration f of force snesor1；
Step 3 rotation loading spanners carry out first time loading, record the first displacement transducer registration x2, the registration of force snesor
f2；
Step 4 rotation loading spanners carry out second and loaded, and record the first displacement transducer registration x3, the registration of force snesor
f3；
Step 5 calculates piston ring torsional angle ∠ a and the ∠ b after loading for the first time and second of loading respectively；
Involved piston ring torsional angle ∠ a and ∠ b calculation expression is
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In formula, p is the circumferential height of piston ring, and q is the width in piston ring section；M is second displacement sensor due to itself chi
The very little compensation displacement relative to laminate border and base recess inwall, column where second displacement sensor with hanging down centered on ∠ d
Angle between line；
Step 6 calculates the piston ring moment of torsion M after loading for the first time and second of loading respectively1And M2；
Involved piston ring moment of torsion M1And M2Calculation expression be
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In formula, ∠ c are ring compression suffered by laminate and angle formed by horizontal direction；D is piston ring internal diameter, and T0 is piston interannular
Gap；
Step 7 calculates piston ring radial section torsional rigidity K；
Involved piston ring radial section torsional rigidity K calculation expression is
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One~step 7 of step 8 repeat steps 3~5 times, then the average value of piston ring radial section torsional rigidity is asked for, finally
Obtain piston ring radial section torsional rigidity test result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108414437A (en) * | 2018-03-15 | 2018-08-17 | 哈尔滨工程大学 | A kind of piston ring hydraulic loading device |
| CN109100244A (en) * | 2018-07-26 | 2018-12-28 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of aircraft torsionspring choosing ginseng test method |
| RU2727211C1 (en) * | 2019-07-29 | 2020-07-21 | Публичное акционерное общество Научно-производственное объединение "Искра" | Device for testing strength of reinforcing plates of elastic nozzle hinge of solid-propellant rocket engine |
| CN112857647A (en) * | 2021-03-25 | 2021-05-28 | 哈尔滨工程大学 | Piston ring circumference elasticity detection device |
| CN114018726A (en) * | 2021-10-22 | 2022-02-08 | 中国空空导弹研究院 | Rigidity-adjustable piano spring type torque loading device |
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| CN102519809A (en) * | 2011-12-31 | 2012-06-27 | 浙江省三门县世泰实业有限公司 | Material torsion testing machine |
| CN103234818A (en) * | 2013-04-28 | 2013-08-07 | 长城汽车股份有限公司 | Clamping device for testing torsional rigidity of shaft sleeve |
| CN205719911U (en) * | 2016-05-12 | 2016-11-23 | 哈尔滨工程大学 | One can continually varying piston ring domain machinery loading device |
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| JPS59178333A (en) * | 1983-03-29 | 1984-10-09 | Nippon Piston Ring Co Ltd | Twist testing method of piston ring |
| CN200961533Y (en) * | 2006-10-21 | 2007-10-17 | 安徽江淮汽车股份有限公司 | Piston ring of diesel engine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414437A (en) * | 2018-03-15 | 2018-08-17 | 哈尔滨工程大学 | A kind of piston ring hydraulic loading device |
| CN109100244A (en) * | 2018-07-26 | 2018-12-28 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of aircraft torsionspring choosing ginseng test method |
| CN109100244B (en) * | 2018-07-26 | 2020-12-18 | 中国航空工业集团公司沈阳飞机设计研究所 | Parameter selection test method for torsion spring for airplane |
| RU2727211C1 (en) * | 2019-07-29 | 2020-07-21 | Публичное акционерное общество Научно-производственное объединение "Искра" | Device for testing strength of reinforcing plates of elastic nozzle hinge of solid-propellant rocket engine |
| CN112857647A (en) * | 2021-03-25 | 2021-05-28 | 哈尔滨工程大学 | Piston ring circumference elasticity detection device |
| CN114018726A (en) * | 2021-10-22 | 2022-02-08 | 中国空空导弹研究院 | Rigidity-adjustable piano spring type torque loading device |
| CN114018726B (en) * | 2021-10-22 | 2023-11-21 | 中国空空导弹研究院 | Piano spring type torque loading device with adjustable rigidity |
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