CN103728075B - Tester for elastohydrodynamic lubricating oil film traction with spinning - Google Patents
Tester for elastohydrodynamic lubricating oil film traction with spinning Download PDFInfo
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- CN103728075B CN103728075B CN201410006064.2A CN201410006064A CN103728075B CN 103728075 B CN103728075 B CN 103728075B CN 201410006064 A CN201410006064 A CN 201410006064A CN 103728075 B CN103728075 B CN 103728075B
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Abstract
A ball groove type tester used for testing elastohydrodynamic lubricating oil film traction with spinning comprises a large base plate, a stepped shaft, a small base plate, an electric spindle I, an electric spindle II, a coupler, a groove test piece, a ball test piece, a linear guide track, a V-shaped groove, a worm and gear mechanism, a lever-pulley loading mechanism and a traction sensor. The large base plate is connected with the small base plate through the stepped shaft, a worm gear is installed on the stepped shaft, and a worm shaft is installed on the large base plate to control the worm gear to rotate. The electric spindle II and the groove test piece are fixed on the small base plate, the ball test piece is fixed on the end portion of the electric spindle I installed in the V-shaped groove fixed on the movable portion of the linear guide track, and loading of the ball test piece on the groove test piece is achieved through a weight and the lever-pulley loading mechanism. The tester can simulate the elastohydrodynamic lubricating state of two contact pieces under oval contact in the sliding state with different spinning quantities and can accurately measure elastohydrodynamic traction of a lubricant.
Description
Technical field
The present invention relates to a kind of tester, especially relating to a kind of ball slot type tester for testing the elastohydrodynamic lubrication oil film tractive force with spin.
Background technology
Elastohydrodynamic lubrication (abbreviation elastohydrodynamic lubrication) is the common lubrication form of many points in engineering, linear contact lay parts, the driving contact parts such as its research needs the rheological characteristics simultaneously considering lubricant between the elastic deformation of two relative motion solid surface and surface of contact, partly/whole ring surface type buncher, rolling bearing are all in ehl status in most cases.Be between two contact elements under ehl status and can form one deck elastohydrodynamic lubrication oil film, the bullet stream pulling figure of oil film half-and-half/the dynamic behavior impact of the driving member such as whole ring surface type buncher, rolling bearing is very large, the oil film tractive force existed between the cone dish of such as half/whole ring surface type buncher and roller determines the power transmission ability of whole buncher.Because different lubricants has different traction rheological characteristicss, and the tractive force application condition obtained by theory calculate is large, and engineering generally will test tractive force by designing special oil film tractive force test unit.Therefore, the research carrying out the experiment tester of lubricant bullet stream tractive force just has great importance.
At present, the general pulling figure test using double-arc spline testing machine or ball-on-disk film tester to carry out lubricant, the part but they come with some shortcomings: 1. can not ehl status under the different spin condition of continuous analog.2. by regulating the angle of two surface in contact turning axles to introduce different spinors, its adjustment process more complicated.3. existing charger generally adopts hydraulic loaded, because hydraulic loaded exists the defect such as leakage, instability, accurately cannot obtain loading force.4. what existing ball-on-disk film tester realized is point (circle) contact, can not realize point (ellipse) contact.
Summary of the invention
In order to overcome the deficiency in background technology, the present invention discloses a kind of elastohydrodynamic lubrication oil film tractive force tester with spin, described tester can be simulated two contact elements and be rolled with the ehl status under sliding mode and different spinor, thus can Reality simulation operating mode, accurately measure the bullet stream tractive force of lubricant.
The present invention is that the technical scheme that the deficiency solved the problems of the technologies described above adopts is as described below.
A kind of elastohydrodynamic lubrication oil film tractive force tester with spin, described tester is by worm-and-wheel gear, angular transformation mechanism, guiding rail mechanism and lever-pulley load maintainer four major part composition, specifically comprise large base plate, multidiameter, platter, electro spindle I, electro spindle II, shaft coupling, groove test specimen, ball test specimen, line slideway, V-type groove, worm gear, worm shaft, lever I, lever II, fixed pulley and drawbar load sensing mechanism, large base plate is connected with platter multidiameter, one end of multidiameter connects large base plate with rolling bearing II, other end flat key II connects platter,
Described angular transformation mechanism comprises platter, electro spindle II, shaft coupling, groove test specimen and balancing weight, platter is fixedly installed a bearing and a bearing seat I, bearing is installed electro spindle II, electro spindle II is connected by shaft coupling one end with groove test specimen, the other end rolling bearing I of groove test specimen is arranged on the bearing seat I li on platter, platter is provided with balancing weight, to ensure that platter is in horizontality simultaneously;
Described guiding rail mechanism comprises support, supporting plate, line slideway, V-type groove, electro spindle I, drawbar load sensing mechanism and ball test specimen, support one end is fixed on large base plate, the other end is fixedly installed a supporting plate, supporting plate fixedly mounts the fixed part of line slideway, and the movable part of line slideway is fixed a V-type groove, electro spindle I is installed in V-type groove, and electro spindle I can rotate in V-type groove around own axes, be provided with drawbar load sensing mechanism along electro spindle I sense of rotation, the end head of electro spindle I is provided with ball test specimen simultaneously;
Described lever-pulley load maintainer comprises lever I, lever II, push rod, connecting rod, counterweight, steel wire and fixed pulley, lever I is arranged on supporting plate, one end of lever I is fixed on supporting plate by fixed hinge bearing I, the other end is connected with lever II by a connecting rod, A point place on lever I is provided with a push rod, the other end of push rod connects the movable part of line slideway, lever II one end is connected with connecting rod, the other end one section of steel wire connects counterweight through fixed pulley, and there is a fixed hinge bearing II at the B point place on lever II;
Described worm-and-wheel gear comprises worm gear, worm shaft and index dial, and worm gear flat key I is arranged on multidiameter, and worm shaft is installed on and is fixed on bearing seat II on large base plate and bearing seat III li, and one end of worm shaft is provided with index dial.
Described a kind of elastohydrodynamic lubrication oil film tractive force tester, described ball test specimen and the surfaceness of groove test specimen with spin
=0.02mm.
Described a kind of elastohydrodynamic lubrication oil film tractive force tester with spin, described worm shaft is single start worm.
Described a kind of elastohydrodynamic lubrication oil film tractive force tester with spin, the axle center of described multidiameter and groove test specimen overlap in the center of circle of the circular arc that surface level projects.
Described a kind of elastohydrodynamic lubrication oil film tractive force tester with spin, described groove test specimen is one with the axle of turning circle cambered surface, and its turning circle cambered surface is annular indent.
Described a kind of elastohydrodynamic lubrication oil film tractive force tester with spin, described ball test specimen is a disk, and the wheel rim of its disk is sphere.
Described a kind of elastohydrodynamic lubrication oil film tractive force tester with spin, the angle value one_to_one corresponding of two turning axles of the scale value on described index dial and ball test specimen and groove test specimen.
Adopt technical scheme as above, the present invention has following beneficial effect.
1. a kind of elastohydrodynamic lubrication oil film tractive force tester with spin of the present invention, utilizes worm-and-wheel gear to control the angle of two test specimen turning axles to obtain different spin values, thus simulates the ehl status under different spin condition; Ball test specimen and groove test specimen is driven to rotate respectively by electro spindle I and electro spindle II, when two test specimen contacts, by atomizer, lubricating oil is sprayed into contact region, then, regulate the rotating speed of electro spindle I and electro spindle II respectively, make groove test specimen and ball test specimen different and produce relative sliding in the linear velocity at contact point place, thus reach between simulation two contact element and roll with the lubricating status slided.
2. a kind of elastohydrodynamic lubrication oil film tractive force tester with spin of the present invention, can ehl status under the different spin values of accurate analog by worm-and-wheel gear and index dial.
3. the single start worm axle owing to adopting has self-locking performance, can the position of accurately pickup groove test specimen and ball test specimen.
4. lever-pulley load maintainer that the present invention adopts has obvious reinforcement effect, and loading range is large, easy to adjust, and directly can read the numerical value of normal load.
5. the groove test specimen that adopts of this test instrument and ball test specimen, in axis loading force can being decomposed grooving test specimen and radial both direction, thus can simulate the real working condition of half/whole ring surface type buncher etc.
6., in this test instrument, the axle center of multidiameter and groove test specimen overlap in the center of circle of the circular arc that surface level projects, thus can ensure under idle condition, and groove test specimen and ball test specimen are always point cantact.
Accompanying drawing explanation
Fig. 1 is the vertical view of a kind of elastohydrodynamic lubrication oil film tractive force tester with spin of the present invention.
Fig. 2 is the front view of tester shown in Fig. 1.
Fig. 3 is the structural representation of worm shaft of the present invention.
Fig. 4 is the structural representation of ball test specimen of the present invention.
In figure: 1-worm-and-wheel gear; The large base plate of 101-; 102-worm gear; 103-worm shaft; 104-index dial; 105-flat key I; 106-flat key II; 107-multidiameter; 108-rolling bearing II; 109-bearing seat II; 110-bearing seat III; 2-angular transformation mechanism; 201-platter; 202-electro spindle II; 203-shaft coupling; 204-groove test specimen; 205-bearing seat I; 206-balancing weight; 207-screw; 208-bearing; 3-guiding rail mechanism: 301-support; 302-supporting plate; 303-line slideway; The fixed part of 303A-line slideway; The movable part of 303B-line slideway; 304-rolling bearing I; 305-electro spindle I; 306-V type groove; 307-drawbar load sensing mechanism; 308-ball test specimen; 4-lever-pulley load maintainer: 401-lever I; 402-lever II; 403-push rod; 404-connecting rod; 405-steel wire; 406-fixed pulley; 407-counterweight; 408-fixed hinge bearing II; 409-fixed hinge bearing I; 410-atomizer.
Embodiment
Be described in further detail the present invention below in conjunction with drawings and Examples, but the present invention is not limited to the following examples.
By reference to the accompanying drawings, a kind of elastohydrodynamic lubrication oil film tractive force tester with spin, is made up of worm-and-wheel gear (1), angular transformation mechanism (2), guiding rail mechanism (3) and lever-pulley load maintainer (4);
Described a kind of elastohydrodynamic lubrication oil film tractive force tester with spin, described tester includes: large base plate (101), multidiameter (107), platter (201), electro spindle I (305), electro spindle II (202), shaft coupling (203), groove test specimen (204), ball test specimen (308), line slideway (303), V-type groove (306), worm gear (102), worm shaft (103), lever I (401), lever II (402), fixed pulley (406) and drawbar load sensing mechanism (307), large base plate (101) is connected with platter (201) multidiameter (107), one end of multidiameter (107) connects large base plate (101) with rolling bearing II (108), other end flat key II (106) connects platter (201),
Described angular transformation mechanism (2) comprises platter (201), electro spindle II (202), shaft coupling (203), groove test specimen (204) and balancing weight (206), platter (201) is fixedly installed a bearing (208) and a bearing seat I (205), bearing (208) is upper installs electro spindle II (202), electro spindle II (202) is connected by shaft coupling (203) one end with groove test specimen (204), the bearing seat I (205) that the other end rolling bearing I (304) of groove test specimen (204) is arranged on platter (201) is inner, platter (201) is provided with balancing weight (206) simultaneously, to ensure that platter (201) is in horizontality, the axle center of multidiameter (107) and groove test specimen (204) overlap in the center of circle of the circular arc that surface level projects, when guaranteeing under no-load condition rotation scale (104) like this, groove test specimen (204) and ball test specimen (308) are always point cantact,
Described guiding rail mechanism (3) comprises support (301), supporting plate (302), line slideway (303), V-type groove (306), electro spindle I (305), drawbar load sensing mechanism (307) and ball test specimen (308), support (301) one end is fixed on large base plate (101), the other end is fixedly installed a supporting plate (302), the fixed part (303A) of supporting plate (302) upper fixed installation line slideway, and the movable part of line slideway (303B) is fixed a V-type groove (306), V-type groove (306) is inner is provided with electro spindle I (305), and electro spindle I (305) can around own axes in the inner rotation of V-type groove (306), along electro spindle I (305) sense of rotation, drawbar load sensing mechanism (307) is installed simultaneously, the end head of electro spindle I (305) is provided with ball test specimen (308), when ball test specimen (308) contacts with groove test specimen (204), the tractive force produced by lubricating oil forces electro spindle I (305) to rotate around own axes, thus drawbar load sensing mechanism (307) reading making V-type groove (306) inner change, by data acquisition and reforming unit, record is collected again, import computing machine into and carry out post-processed,
Described lever-pulley load maintainer (4) comprises lever I (401), lever II (402), push rod (403), connecting rod (404), counterweight (407), steel wire (405) and fixed pulley (406), lever I (401) is arranged on supporting plate (302), one end of lever I (401) is fixed on supporting plate (302) by fixed hinge bearing I (409), the other end is connected with lever II (402) by a connecting rod (404), A point place on lever I (401) is provided with a push rod (403), the other end of push rod (403) connects the movable part (303B) of line slideway, lever II (402) one end is connected with connecting rod (404), the other end connects counterweight (407) with one section of steel wire (405) through fixed pulley (406), there is a fixed hinge bearing II (408) at B point place on lever II (402), the gravity straight down utilizing counterweight (407) to produce is to steel wire (405) pulling force, through lever II (402) and lever I (401), pulling force is amplified, push rod (403) is made to produce enough large thrust, the movable part (303B) promoting line slideway moves along guide rail direction, thus completes ball test specimen (308) to the loading of groove test specimen (204),
Described worm-and-wheel gear (1) comprises worm gear (102), worm shaft (103) and index dial (104), worm gear (102) flat key I (105) is arranged on multidiameter (107), worm shaft (103) be installed on be fixed on bearing seat II (109) on large base plate (101) and bearing seat III (110) inner, one end of worm shaft (103) is provided with index dial (104), the angle value one_to_one corresponding of two turning axles of the scale value on index dial (104) and groove test specimen (204), ball test specimen (308).
When implementing a kind of elastohydrodynamic lubrication oil film tractive force tester with spin of the present invention, first lubricating oil is heated to design temperature, rotary dial (104) again, worm shaft (103) and worm gear (102) is allowed to drive platter (201) to rotate, thus the angle between control flume test specimen (204) and ball test specimen (308) two turning axle, obtain different spin values; Then electro spindle I (305) and electro spindle II (202) is made to drive ball test specimen (308) and groove test specimen (204) to rotate, by the lubricating oil after heating through atomizer (410) spirt ball groove contact region respectively; The counterweight (407) finally loading corresponding weight makes ball test specimen (308) and groove test specimen (204) produce Elliptical Contacts; The weight of loading counterweight (407) adds to after two-stage leverage amplifies a thrust of push rod (403), its thrust magnitude normal load equaled between ball test specimen (308) and groove test specimen (204), and the movable part (303B) of electro spindle I (305), V-type groove (306), line slideway and the general assembly (TW) of ball test specimen (308) are in the upper friction force produced of the fixed part (303A) of line slideway;
Under the condition of sufficient lubrication, due to the effect of normal load, ball test specimen (308) contacts the corresponding elastic deformation of concurrent life with groove test specimen (204), point cantact becomes Elliptical Contacts, one deck elastohydrodynamic lubrication oil film can be formed between ball groove contact region, now, the rotating speed of adjustment electro spindle I (305) and electro spindle II (202), make to produce relative sliding between ball test specimen (308) and groove test specimen (204) surface in contact, the elastohydrodynamic lubrication oil film therefore between two surface of contact will produce bullet stream tractive force to ball test specimen (308) and groove test specimen (204); Under the effect of bullet stream tractive force, ball test specimen (308) and electro spindle I (305) can deflect V-type groove (306) is inner around the axis of electro spindle I (305), thus compressing drawbar load sensing mechanism (307), by drawbar load sensing mechanism (307), the force signal collected is converted to digital signal, and imports computing machine into and carry out post-processed; When the test is finished, reduce the weight of counterweight (407), complete unloading, therefore described tester loading and unloading operation is all very convenient;
Repeat above-mentioned steps, complete under different spin values, different temperatures, different loads, different sliding speed effect, the testing research of Elliptical Contacts elastohydrodynamic lubrication oil film tractive force.
Part not in the detailed description of the invention is prior art, therefore the present invention is not described in detail.
Claims (5)
1. the elastohydrodynamic lubrication oil film tractive force tester with spin, it is characterized in that: described tester is by worm-and-wheel gear (1), angular transformation mechanism (2), guiding rail mechanism (3) and lever-pulley load maintainer (4) four major part composition, specifically comprise large base plate (101), multidiameter (107), platter (201), electro spindle I (305), electro spindle II (202), shaft coupling (203), groove test specimen (204), ball test specimen (308), line slideway (303), worm gear (102), worm shaft (103), lever I (401), lever II (402), fixed pulley (406) and drawbar load sensing mechanism (307), large base plate (101) is connected with platter (201) multidiameter (107), one end of multidiameter (107) connects large base plate (101) with rolling bearing II (108), other end flat key II (106) connects platter (201),
Described lever-pulley load maintainer (4) comprises lever I (401), lever II (402), push rod (403), connecting rod (404), counterweight (407), steel wire (405) and fixed pulley (406), lever I (401) is arranged on supporting plate (302), one end of lever I (401) is fixed on supporting plate (302) by fixed hinge bearing I (409), the other end is connected with lever II (402) by a connecting rod (404), A point place on lever I (401) is provided with a push rod (403), the other end of push rod (403) connects the movable part (303B) of line slideway, lever II (402) one end is connected with connecting rod (404), the other end connects counterweight (407) with one section of steel wire (405) through fixed pulley (406), there is a fixed hinge bearing II (408) at B point place on lever II (402),
Described worm-and-wheel gear (1) comprises worm gear (102), worm shaft (103) and index dial (104), worm gear (102) flat key I (105) is arranged on multidiameter (107), worm shaft (103) be installed on be fixed on bearing seat II (109) on large base plate (101) and bearing seat III (110) inner, one end of worm shaft (103) is provided with index dial (104); Described worm shaft (103) is single start worm;
Described angular transformation mechanism (2) comprises platter (201), electro spindle II (202), shaft coupling (203), groove test specimen (204) and balancing weight (206), platter (201) is fixedly installed a bearing (208) and a bearing seat I (205), bearing (208) is upper installs electro spindle II (202), electro spindle II (202) is connected by shaft coupling (203) one end with groove test specimen (204), the bearing seat I (205) that the other end rolling bearing I (304) of groove test specimen (204) is arranged on platter (201) is inner, platter (201) is provided with balancing weight (206) simultaneously,
Described guiding rail mechanism (3) comprises support (301), supporting plate (302), line slideway (303), V-type groove (306), electro spindle I (305), drawbar load sensing mechanism (307) and ball test specimen (308), support (301) one end is fixed on large base plate (101), the other end is fixedly installed a supporting plate (302), the fixed part (303A) of supporting plate (302) upper fixed installation line slideway, and the movable part of line slideway (303B) is fixed a V-type groove (306), V-type groove (306) is inner is provided with electro spindle I (305), and electro spindle I (305) can around own axes in the inner rotation of V-type groove (306), along electro spindle I (305) sense of rotation, drawbar load sensing mechanism (307) is installed simultaneously, the end head of electro spindle I (305) is provided with ball test specimen (308).
2. as claimed in claim 1 a kind of with spin elastohydrodynamic lubrication oil film tractive force tester, it is characterized in that: described ball test specimen (308) and the surfaceness of groove test specimen (204)
=0.02mm.
3. a kind of elastohydrodynamic lubrication oil film tractive force tester with spin as claimed in claim 1, is characterized in that: the axle center of described multidiameter (107) and groove test specimen (204) overlap in the center of circle of the circular arc that surface level projects.
4. a kind of elastohydrodynamic lubrication oil film tractive force tester with spin as claimed in claim 1, is characterized in that: described groove test specimen (204) is one with the axle of turning circle cambered surface, and its turning circle cambered surface is annular indent.
5. as claimed in claim 1 a kind of with spin elastohydrodynamic lubrication oil film tractive force tester, it is characterized in that: described ball test specimen (308) is a disk, the wheel rim of its disk is sphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410006064.2A CN103728075B (en) | 2014-01-07 | 2014-01-07 | Tester for elastohydrodynamic lubricating oil film traction with spinning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410006064.2A CN103728075B (en) | 2014-01-07 | 2014-01-07 | Tester for elastohydrodynamic lubricating oil film traction with spinning |
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|---|---|
| CN103728075A CN103728075A (en) | 2014-04-16 |
| CN103728075B true CN103728075B (en) | 2015-07-08 |
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| CN201410006064.2A Expired - Fee Related CN103728075B (en) | 2014-01-07 | 2014-01-07 | Tester for elastohydrodynamic lubricating oil film traction with spinning |
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| CN107339385B (en) * | 2016-10-31 | 2023-08-15 | 西华大学 | Spin-free single-ring disc type stepless speed change unit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5372033A (en) * | 1993-11-18 | 1994-12-13 | Mobil Oil Corporation | EHL test machine for measuring lubricant film thickness and traction |
| CN201206974Y (en) * | 2008-05-23 | 2009-03-11 | 中国矿业大学 | High-pressure microgap lubricating test machine |
| CN101710060B (en) * | 2009-12-10 | 2014-02-26 | 张永斌 | Method for measuring interfacial shear strength under full plastic contact of discs and flat plate and device thereof |
| JP2011185761A (en) * | 2010-03-09 | 2011-09-22 | Ntn Corp | Device for measuring traction characteristic of lubricant |
| CN202793970U (en) * | 2012-08-13 | 2013-03-13 | 河南科技大学 | Double-disc type lubricating oil tractive power testing machine |
| CN203643068U (en) * | 2014-01-07 | 2014-06-11 | 四川大学 | Elastohydrodynamic lubricating oil film traction force tester with spin |
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