CN204422389U - A kind of hydraulic loaded ball disc type bullet stream friction testing instrument - Google Patents
A kind of hydraulic loaded ball disc type bullet stream friction testing instrument Download PDFInfo
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- CN204422389U CN204422389U CN201520082561.0U CN201520082561U CN204422389U CN 204422389 U CN204422389 U CN 204422389U CN 201520082561 U CN201520082561 U CN 201520082561U CN 204422389 U CN204422389 U CN 204422389U
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Abstract
The utility model discloses a kind of hydraulic loaded ball disc type bullet stream friction testing instrument, comprises casing, static pressure axle, hydrostatic bearing, static pressure axle sleeve, electro spindle A, electro spindle B, ball test specimen, dish test specimen, return tray, holder, electro spindle B holder, loading measurement system, friction force measurement system, Hydraulic Station under holder, electro spindle A on electro spindle A.Hydraulic loaded adopts double pump three oil circuit oil supply system, and two-way pressure oil is for the lubrication of hydrostatic bearing; One road pressure oil supply loads oil sump and is used for hydraulic loaded, containing automatic electro-hydraulic proportional valve on this oil circuit.Described automatic electro-hydraulic proportional valve and load transducer form close loop control circuit, for ensureing the accurate of the stable and added load of oil pressure on loading oil circuit.Described structure of the present utility model is simple, can load continuously, and load loads stable and measuring accuracy is high.
Description
Technical field
The utility model relates to lubricating oil technical field of measurement and test, particularly relates to a kind of hydraulic loaded ball disc type bullet stream friction testing instrument.
Background technology
Elastohydrodynamic lubrication Frotteurism is a kind of Frotteurism common and important in commercial production, under the mechanical component that gear, bearing and cam etc. are conventional are all operated in this Frotteurism mostly.The bullet stream friction force of lubricant has a significant impact the motion state of the rolling body in bearing, the follower gear in gear pair and dynamic perfromance, thus affects the life-span of bearing and gear.Usable range and the rubbing characteristics of different lubricant have very large difference, in order to provide correct suggestion to the use of lubricant in engineer applied, current theory calculate does not reach the precision of engine request, the general bullet stream friction coefficient being all method by experiment and obtaining lubricant, this just proposes very high requirement to the reliability of lubricant bullet stream rubbing characteristics tester, Stability and veracity.
At present focusing mostly in the boundary lubrication condition of sliding motion to the friction force experiment of lubricant, take four-ball tester as Typical Representative, but four-ball tester can not measure the friction force under ehl status; Also the bullet stream friction force of test lubricating oil under linear contact lay is had, with double-arc spline, four Disk Machines for representative.Test for point cantact elastohydrodynamic lubrication friction force has employing four to coil machine to measure, and its mid-game test specimen adopts the conical surface and sphere-contact, but such spherical faced pan test specimen is difficult to processing, and hydraulic loaded is inaccurate, is seldom adopted by people.What general employing was more is ball disc type bullet stream friction testing instrument, ball disc type bullet stream friction testing instrument common are lever-loading and hydraulic loaded two kinds of structures, although lever-loading is accurate, but because be that rigidity loads, the vibration at the volley of pan-pelletizer test specimen can be made, and because adopt counterweight to load, the continuous loading of load can not be realized.The critical defect that the hydraulic loaded method provided in the document published exists is: load unstable, be difficult to the exact value being transferred to required loaded load, thus causing the inaccurate and added load of added load can not Measurement accuracy, this is because the defect of testing machine main frame Design of Mechanical Structure aspect and the unreasonable of hydraulic oil supply unit structural design are caused.
Summary of the invention
In order to overcome the deficiency in background technology, the utility model discloses a kind of hydraulic loaded ball disc type bullet stream friction testing instrument, and project organization is fairly simple, can realize continuous loading, and it is stable, accurate to load, and load added by energy Measurement accuracy.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of hydraulic loaded ball disc type bullet stream friction testing instrument, described tester comprises holder, electro spindle B holder, loading measurement system, friction force measurement system etc. under casing, static pressure axle, hydrostatic bearing, static pressure axle sleeve, electro spindle A, electro spindle B, ball test specimen, dish test specimen, return tray, the upper holder of electro spindle A, electro spindle A, it is characterized in that: described loading measurement system comprises Hydraulic Station, loads oil sump, silicagel pad, load transducer headgear, load transducer, adds carrier, loads and overlap; Described load transducer with add carrier and be fixed together, load transducer headgear is stretched in the bottom of load transducer, adds carrier and stretches into and load cover, and can move up and down in loading cover; Load cover bottom to be connected with load transducer headgear by bolt, load transducer headgear bottom by bolt and silicagel pad with load oil sump and be connected, the pressure oil that Hydraulic Station supplies enters loading oil sump by oil pipe, by silicagel pad transmission of pressure to sensor; Described loading cover top and static pressure axle sleeve are connected by screw, and load the through hole that cover stretches into casing upper side, by screw, loading cover upper flange and casing are connected;
The inner two ends up and down of described static pressure axle sleeve are symmetrically installed with the hydrostatic bearing of same size, and axle sleeve upper side is connected with seat board; Described static pressure axle is placed in the endoporus of hydrostatic bearing, can move up and down, and static pressure axle upper side is connected with holder bottom surface under electro spindle A, and the bottom surfaces of static pressure axle upper flange is higher than seat board upper side.Described hydrostatic bearing provides lubricating oil by Hydraulic Station, and lubricating oil enters through oil pipe in the aperture that bearing periphery is offered, between static pressure axle and hydrostatic bearing, form hydrostatic lubrication;
Described electro spindle A lies in a horizontal plane under electro spindle A on holder, and under electro spindle A, holder is connected with holder on electro spindle A by four bolts; Upper holder and the lower holder inside of electro spindle A all have semicylindrical opening, the diameter of semicylindrical opening and the equal diameters of electro spindle A, by adjusting the tightness of four adjustable electro spindle of bolt; At the head of electro spindle A, ball test specimen is installed;
Described electro spindle B is arranged in electro spindle B holder, and the bottom surfaces of electro spindle B holder is fixedly connected with casing upper side; Described electro spindle B top is provided with return tray; The top of described electro spindle B is stretched in return tray by the circular hole in return tray bottom surfaces; Described dish test specimen is fixed on electro spindle B top by nut; Described return tray side has circular hole, and the circular hole level that ball test specimen is offered by return tray side stretches in return tray; Described return tray bottom surfaces side has oil return opening;
Described friction force measurement system bottom surfaces is fixedly mounted on seat board, and upper side contacts with electro spindle A lower clamp afterbody.
Hydraulic Station in described loading measurement system is placed on box house bottom surface, is double pump three oil circuit oil supply system, and two-way pressure oil is for the lubrication of hydrostatic bearing; One road pressure oil supply loads oil sump and is used for hydraulic loaded, containing automatic electro-hydraulic proportional valve on this oil circuit.Automatic electro-hydraulic proportional valve and described load transducer form close loop control circuit, for ensureing the accurate of the stable and added load of oil pressure on loading oil circuit; First automatically electro-hydraulic proportional valve supplies pressure oil according to set pressure for loading in oil sump, after the electric signal of load transducer feedback is greater than or less than set pressure, automatic electro-hydraulic proportional valve can reduce rapidly or increase the size of inner pressure relief valve port thus the size of oil pressure in controlled loading oil sump according to certain ratio, make it reach setting value rapidly.
Compared with existing device, the beneficial effect that the utility model brings is:
(1) the automatic electro-hydraulic proportional valve in loading system and load transducer form close loop control circuit, improve the stability of hydraulic loaded, and the accuracy of added load;
(2) by the size of hydraulic pressure size controlled loading load, continuous loading can be realized;
(3) hydraulic loaded can play the effect of absorbing, prevents vibration during ball dish test specimen contact movement, makes the operation of system more steady;
(4) when in this tester course of work during unexpected power-off, hydraulic loading system can unload voluntarily, prevents ball dish test specimen from destroying, and this tester is operated more safe and reliable.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is hydraulic loading system of the present utility model;
Fig. 3 is friction force measurement system schematic diagram.
In figure: 1 loads oil sump; 2 silicagel pad; 3 load transducer headgears; 4 load transducers; 5 add carrier; 6 load cover; 7 static pressure axle sleeves; 8 hydrostatic bearings; 9 seat boards; 10 friction force measurement system; 11 static pressure axles; Holder under 12 electro spindle A; Holder on 13 electro spindle A; 14 electro spindle A; 15 ball test specimens; 16 dish test specimens; 17 return traies; 18 electro spindle B; 19 electro spindle B holders; 20 casings; 21 Hydraulic Stations; 22 oil pipe A; 23 oil pipe B; 24 oil pipe C; 25 oil return openings; 26 automatic electro-hydraulic proportional valves.
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As Fig. 1, a kind of hydraulic loaded ball disc type bullet stream friction testing instrument of the present utility model comprises casing 20, static pressure axle 11, hydrostatic bearing 8, static pressure axle sleeve 7, electro spindle A14, electro spindle B18, ball test specimen 15, dish test specimen 16, return tray 17, holder 12, electro spindle B holder 19, loading measurement system, friction force measurement system 10 under holder 13, electro spindle A on electro spindle A.
Described loading measurement system comprises Hydraulic Station 21, loads oil sump 1, silicagel pad 2, load transducer headgear 3, load transducer 4, adds carrier 5, loads cover 6.Described load transducer 4 with add carrier 5 and be fixed together, load transducer headgear 3 is stretched in the bottom of load transducer 4, adds carrier 5 and stretches into and load cover 6, and can move up and down in loading cover 6; Load cover 6 bottom to be connected with load transducer headgear 3 by bolt, load transducer headgear 3 bottom is by bolt and silicagel pad 2 and load oil sump 1 and be connected, the pressure oil that Hydraulic Station 21 supplies is entered by oil pipe A22 and loads oil sump 1, by silicagel pad 2 transmission of pressure to sensor 4; Described loading cover 6 top and static pressure axle sleeve 7 are connected by screw, and load the through hole that cover 6 stretches into casing 20 upper side, by screw, loading cover 6 upper flange and casing 20 upper side are connected.
Described Hydraulic Station 21 is placed on the inner bottom surface of casing 20, is double pump three oil circuit oil supply system, and two-way pressure oil is through the lubrication of oil pipe B23 and oil pipe C24 for hydrostatic bearing 8; One road pressure oil supplies through oil pipe A22 and loads oil sump 1 for hydraulic loaded, containing automatic electro-hydraulic proportional valve 26 on this oil circuit.
Described automatic electro-hydraulic proportional valve 26 forms close loop control circuit with load transducer 4, for ensureing that the oil pressure loading pressure oil in oil sump 1 stablizes the accuracy with added load, first automatically electro-hydraulic proportional valve 26 supplies pressure oil according to set pressure for loading in oil sump 1, after the electric signal of load transducer 4 feedback is greater than or less than set pressure, automatic electro-hydraulic proportional valve 26 can reduce rapidly or increase the size of inner pressure relief valve port thus the size of oil pressure in controlled loading oil sump 1 according to certain ratio, make it reach setting value rapidly.
The inner two ends up and down of described static pressure axle sleeve 7 are symmetrically installed with the hydrostatic bearing 8 of same size, and axle sleeve 7 upper side is connected with seat board 9; Described static pressure axle 11 is placed in the endoporus of hydrostatic bearing 8, can move up and down, and static pressure axle 11 upper side is connected with holder 12 bottom surface under electro spindle A, and the bottom surfaces of static pressure axle 11 upper flange is higher than seat board 9 upper side.Described hydrostatic bearing 8 provides lubricating oil by Hydraulic Station 21, and lubricating oil enters through oil pipe B23 and oil pipe C24 in the aperture that hydrostatic bearing 8 periphery is offered, between static pressure axle 11 and hydrostatic bearing 8, form hydrostatic lubrication.
Described electro spindle A14 lies in a horizontal plane under electro spindle A on holder 12, and under electro spindle A, holder 12 is connected with holder 13 on electro spindle A by four bolts; Upper holder 13 and lower holder 12 inside of electro spindle A all have semicylindrical opening, the diameter of semicylindrical opening and the equal diameters of electro spindle A14, by adjusting the tightness of four adjustable electro spindle A14 of bolt; At the head of electro spindle A14, ball test specimen 15 is installed.
Described electro spindle B18 is arranged in electro spindle B holder 19, and the bottom surfaces of electro spindle B holder 19 is fixedly connected with casing 20 upper side; Described electro spindle B18 top is provided with return tray 17; The top of described electro spindle B18 is stretched in return tray 17 by the circular hole in return tray 17 bottom surfaces; Described dish test specimen 16 is fixed on electro spindle B18 top by nut; Described return tray 17 side has circular hole, and ball test specimen 15 stretches in return tray 17 by the circular hole level that return tray side is offered; The upper side of described ball test specimen 15 is not higher than dish test specimen 16 bottom surfaces on electro spindle B18; Described return tray 17 bottom surfaces side has oil return opening 25.
Described friction force passes measuring system 10 bottom surfaces and is fixedly mounted on seat board 9, and upper side contacts with holder 12 afterbody under electro spindle A.The structure of friction force measurement system 10 and consist of known technology, no longer describes in detail herein.
When implementing a kind of hydraulic loaded ball disc type bullet stream friction testing instrument described in the utility model, first by oil spout parts, lubricating oil is injected to the surface of dish test specimen 16, starts electro spindle B18 and electro spindle A14 simultaneously, band Moving plate test specimen 16 and ball test specimen 15 rotate; During loading, hydraulic oil enters loading oil sump 1 by Hydraulic Station 21 through oil pipe A22, promote load transducer 4, add carrier 5 and electro spindle A14 moves up, until ball test specimen 15 contacts with dish test specimen 16, the data that load transducer 4 now records deduct electro spindle A14, the holder up and down 12 and 13 of electro spindle A, static pressure axle 11, add carrier 5, the weight sum of load transducer 4 is normal direction contact load between actual ball dish.After ball test specimen 15 contacts with dish test specimen 16, elastohydrodynamic lubrication oil film can be formed in contact position; By adjusting the rotating speed of electro spindle A14 and electro spindle B18, making ball test specimen 15 inconsistent in the linear velocity at contact point place with dish test specimen 16, producing relative sliding, will friction force be produced; Under the effect of friction force, on electro spindle A14 and electro spindle A, under holder 13 and electro spindle A, holder 12 deflects around the central axis of static pressure vertical shaft 11, compressing is arranged on the friction force measurement system 10 of holder 12 afterbody under electro spindle A, and converts according to lever principle and obtain the friction force of lubricant; After experiment terminates, stopping the pressure oil supplying to loading in oil sump 1, being separated between ball test specimen 15 with dish test specimen 16, realizing unloading.
Claims (2)
1. a hydraulic loaded ball disc type bullet stream friction testing instrument, described tester comprises holder, electro spindle B holder, loading measurement system, friction force measurement system etc. under casing, static pressure axle, hydrostatic bearing, static pressure axle sleeve, electro spindle A, electro spindle B, ball test specimen, dish test specimen, return tray, the upper holder of electro spindle A, electro spindle A, it is characterized in that: described loading measurement system comprises Hydraulic Station, loads oil sump, silicagel pad, load transducer headgear, load transducer, adds carrier, loads and overlap; Load transducer with add carrier and be fixed together, load transducer headgear is stretched in the bottom of load transducer, adds carrier and stretches into and load cover, and can move up and down in loading cover; Load cover bottom to be connected with load transducer headgear by bolt, load transducer headgear bottom by bolt and silicagel pad with load oil sump and be connected, the pressure oil that Hydraulic Station supplies enters loading oil sump by oil pipe, by silicagel pad transmission of pressure to sensor; Described loading cover top and static pressure axle sleeve are connected by screw, and load the through hole that cover stretches into casing upper side, by screw, loading cover upper flange and casing are connected;
Described static pressure axle sleeve is built with hydrostatic bearing, and axle sleeve upper side is connected with seat board; Described static pressure axle upper side is connected with holder bottom surface under electro spindle A, and the bottom surfaces of static pressure axle upper flange is higher than seat board upper side;
Described electro spindle A lies in a horizontal plane under electro spindle A on holder, and under electro spindle A, holder is connected with holder on electro spindle A by four bolts; Upper holder and the lower holder inside of electro spindle A all have semicylindrical opening, the diameter of semicylindrical opening and the equal diameters of electro spindle A, by adjusting the tightness of four adjustable electro spindle of bolt; At the head of electro spindle A, ball test specimen is installed;
Described electro spindle B is arranged in electro spindle B holder, and the bottom surfaces of electro spindle B holder is fixedly connected with casing upper side; Described electro spindle B top is provided with return tray; The top of described electro spindle B is stretched in return tray by the circular hole in return tray bottom surfaces; Described dish test specimen is fixed on electro spindle B top by nut; Described return tray side has circular hole, and the circular hole level that ball test specimen is offered by return tray side stretches in return tray; Described return tray bottom surfaces side has oil return opening;
Described friction force measurement system bottom surfaces is fixedly mounted on seat board, and upper side contacts with electro spindle A lower clamp afterbody.
2. a kind of hydraulic loaded ball disc type bullet stream friction testing instrument according to claim 1, it is characterized in that: the Hydraulic Station in described loading measurement system is placed on box house bottom surface, for double pump three oil circuit oil supply system, two-way pressure oil is for the lubrication of hydrostatic bearing; One road pressure oil supply loads oil sump and is used for hydraulic loaded, containing automatic electro-hydraulic proportional valve on this oil circuit.Automatic electro-hydraulic proportional valve and described load transducer form close loop control circuit, for ensureing the accurate of the stable and added load of oil pressure on loading oil circuit; First automatically electro-hydraulic proportional valve supplies pressure oil according to set pressure for loading in oil sump, after the electric signal of load transducer feedback is greater than or less than set pressure, automatic electro-hydraulic proportional valve can reduce rapidly or increase the size of inner pressure relief valve port thus the size of oil pressure in controlled loading oil sump according to certain ratio, make it reach setting value rapidly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520082561.0U CN204422389U (en) | 2015-02-05 | 2015-02-05 | A kind of hydraulic loaded ball disc type bullet stream friction testing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520082561.0U CN204422389U (en) | 2015-02-05 | 2015-02-05 | A kind of hydraulic loaded ball disc type bullet stream friction testing instrument |
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| CN204422389U true CN204422389U (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520082561.0U Expired - Fee Related CN204422389U (en) | 2015-02-05 | 2015-02-05 | A kind of hydraulic loaded ball disc type bullet stream friction testing instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092798A (en) * | 2016-08-05 | 2016-11-09 | 陕西科技大学 | A kind of experimental provision studying the lower friction test of titrimetry sea water lubrication and method |
| US10281388B2 (en) | 2015-12-18 | 2019-05-07 | Ducom Instruments Pvt. Ltd. | Tester to estimate co-efficient of friction and determine properties of a sample lubricant |
-
2015
- 2015-02-05 CN CN201520082561.0U patent/CN204422389U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10281388B2 (en) | 2015-12-18 | 2019-05-07 | Ducom Instruments Pvt. Ltd. | Tester to estimate co-efficient of friction and determine properties of a sample lubricant |
| CN106092798A (en) * | 2016-08-05 | 2016-11-09 | 陕西科技大学 | A kind of experimental provision studying the lower friction test of titrimetry sea water lubrication and method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20190205 |
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| CF01 | Termination of patent right due to non-payment of annual fee |