CN104502271A - Device for measuring friction coefficient of water-lubricated bearing with low speed and heavy load - Google Patents
Device for measuring friction coefficient of water-lubricated bearing with low speed and heavy load Download PDFInfo
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- CN104502271A CN104502271A CN201510001284.0A CN201510001284A CN104502271A CN 104502271 A CN104502271 A CN 104502271A CN 201510001284 A CN201510001284 A CN 201510001284A CN 104502271 A CN104502271 A CN 104502271A
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Abstract
The invention provides a device for measuring the friction coefficient of a water-lubricated bearing with low speed and heavy load. The device mainly comprises an executing mechanism, a water circulating device, a sealing device, a motor, a transmission device, a shaft, bearing and a friction-force measuring device, wherein the executing mechanism is used for meeting vertical and uniform loading of load of the specific-pressure bearing; the water circulating device and the sealing device are used for guaranteeing full cooling and lubrication of the bearing; the motor and the transmission device drive a shaft system to rotate; and the friction-force measuring device is designed on the basis of the force-balance principle. The device provided by the invention has the advantages that the systems are connected by utilizing a base, a pipeline and a rod-beam structure to form the process of lubricating, rotating, loading and measuring the whole water-lubricated bearing, so that the measurement of the friction coefficient is realized; a hydraulic cylinder is adopted for combining with an ejecting rod, a linear bearing and a rolling bearing and is used as a loading device, so that the vertical loading force only applied on the measured bearing is guaranteed and the large-load loading is realized; simultaneously, the interference of the friction force of other supporting bearings on a measured result is effectively avoided, and the accurate measurement of the friction coefficient is realized.
Description
Technical field
What the present invention relates to is a kind of bearing friction coefficient measuring device, especially a kind of bearing friction coefficient measuring device being applicable to the measurement of marine low-speed heavy duty water lubriucated bearing friction factor.
Background technology
Improving constantly of the tonnage of ship is had higher requirement to its main frame, propulsion system.In order to proof strength, oar axle system quality constantly increases, the friction phenomenon that the load that stern journal bearing of ship bears improves constantly and produces, and have impact on normal operation and bearing serviceable life of axle system, makes the design of bearing and type selecting face new problem.Bearing friction coefficient is the important indicator of bearing type selecting, is also condition precedent important in design bearing flow process, needs just to obtain its numerical value to carry out follow-up study accurately in experimental stage.The water lubriucated bearing friction coefficient measurement how carrying out low-speed heave-load is problem to be solved by this invention.
At present, all heavier optical axis of domestic colleges and universities and research institution holds the measurement of friction factor, sets up test-bed according to axle system actual arrangement form, uses rotary speed torque sensor to measure bearing friction coefficient.Due to the difference of the environment for use of bearing, measured bearing is applied in the environment of oil lubrication, high-speed rotation axle system more; The hydraulic loaded mode of testing table many employings screw propeller end of the water lubriucated bearing friction coefficient measuring apparatus under heavy duty environment, and spring bearing is more, the result that rotary speed torque sensor is measured contains the composition of each spring bearing friction force, is difficult to accurately obtain bearing friction coefficient results.
In the patent document of publication number CN1117978C (publication date on August 13rd, 2003), disclose a kind of micro bearing friction coefficient method of testing and device.Comprise foil gauge, cantilever test spring sheet, flexible cable, measured bearing, micro-counterweight, axle journal dop and buncher, this device utilizes drag-line braking principle, effectively can measure the coefficient of sliding friction of bearing.Utilize drag-line braking principle, drag-line pulling force is converted to the radial pressure between bearing shell and axle journal, after being rotated by axle journal, the pulling force difference at flexible cable two ends reflects the friction force size between axle journal and bearing shell, and utilize the voltage signal of cantilever test spring foil gauge to change, accurately measure miniature bearing friction force.This technical scheme carries out for miniature rotor bearing friction coefficient a kind of device of measuring, do not possess the measurement capability of large load, low speed, water lubriucated bearing friction factor.
Describe a kind of water lubricated rubber bearing friction coefficient measuring apparatus peculiar to vessel in " water lubricated rubber bearing vibration and noise mechanism is analyzed and experimental study " disclosed in " water lubricated rubber bearing friction behavior and experimental study " disclosed in " naval vessel science and technology " (2009Vol.31) and " vibration and impact " (2011Vol.30), this device is made up of frequency-conversion alternating current motor, speed reduction unit, intermediate bearing, rubber head/tail bearing, tailing axle, intermediate shaft and load maintainer.This device applies vertical force by the charger being arranged in axle system screw propeller end, bearing to be measured is made to meet the bearings ratio to press (0.1-0.4MPa) of setting, by the moment of friction under rotary speed torque sensor Measurement sensibility state, converted by dynamic balance relation and obtain friction factor.Described test unit can carry out the measurement of bearing friction coefficient, and the bearing friction coefficient that can realize under large specific pressure environment is measured, the variation relation that bearing friction coefficient changes with specific pressure, rotating speed etc. can be described simultaneously, but the moment of torsion that rotary speed torque sensor measurement obtains not only includes the moment of friction of bearing to be measured, further comprises the moment of friction of each intermediate bearing, therefore measurement result accurately can not reflect the friction co-efficient value of bearing to be measured, only can describe overall trend.
Wuhan University of Technology describes SSB-100 type ship tailing axle testing machine in master's thesis " stern journal bearing of ship water lubrication numerical calculation of fan properties and experimental study " literary composition in 2008, this device can measure the measurement for bearing friction coefficient, is made up of variable-frequency motor, torque measuring device, velocity measuring device, spring bearing, bearing to be measured and charger.Directly load (0.1-0.8MPa) is loaded on measured bearing by charger, by the torque sensor measurement result between spring bearing and motor, and obtains bearing friction coefficient by aftertreatment.Test unit described in literary composition can carry out bearing friction coefficient and measure and research, because charger directly acts on bearing to be measured, the bearing friction coefficient that therefore can carry out larger specific pressure is measured, and obtain the variation relation that bearing friction coefficient changes with specific pressure, rotating speed etc., but this device still adopts the measurement result of torque sensor as experimental result for calculation of friction coefficient, which includes the moment of friction of each intermediate bearing, spring bearing, therefore measurement result still accurately can not reflect the friction co-efficient value of bearing to be measured.
Summary of the invention
The object of the present invention is to provide one can meet low-speed heave-load water lubriucated bearing friction factor accurately to measure, improve the device for low-speed heave-load water lubriucated bearing friction coefficient measurement of water lubriucated bearing friction coefficient measurement precision.
The object of the present invention is achieved like this
Comprise bearing load load maintainer 10, water circulation and packoff 20, motor and gearing 30, axle 40, friction measurement device 60 and pedestal,
Described bearing load load maintainer 10 comprises hydraulic cylinder 13, load sensor 14, load bar 15 and loads rolling bearing mechanism 19, hydraulic cylinder 13 is arranged on base, load sensor 14 is arranged on load bar 15 lower end, and rolling bearing mechanism 19 is arranged on load bar 15 upper end
Described water circulation and packoff 20 comprise circulation line 23, pump 24, water tank 27 and end cover 22, water in water tank is through gap that pump enters axle and bearing to be measured from bearing one end to be measured and bearing tank to be measured, reflow tank is flowed out from the bearing other end to be measured
Described motor and gearing 30 comprise motor 2, shaft coupling 4 and rotary speed torque sensor 6, motor arrangement is on pedestal 1, and motor 2 is connected with the axle 40 be arranged on pedestal by shaft coupling 4, and rotary speed torque sensor 6 links with shaft coupling 4, bearing 50 to be measured is installed on axle 40
Described friction measurement device 60 comprises arm bar 61, strain transducer 63, push rod 64, one end of arm bar 61 is connected on bearing case to be measured, the other end of arm bar 61 and the strain transducer 63 of vertical layout hinged, described strain transducer is supported on pedestal by push rod 64 is vertical.
Pedestal is arranged linear bearing 16, load bar is retrained by linear bearing 16.
Described shaft coupling 4 is pin couplers.
Set temperature sensor in water tank 27.
Described loading rolling bearing mechanism is made up of 5 rolling bearings.
The invention provides a kind of device that can meet low-speed heave-load water lubriucated bearing friction factor and accurately measure, object seeks new bearing friction coefficient metering system and the structural design of correspondence thereof, improves water lubriucated bearing friction coefficient measurement precision.
To achieve the object of the present invention, consider stern journal bearing of ship rotating speed, specific pressure scope, around the new structural design of bearing load load maintainer, friction measurement device, propose the guiding theory of overall plan of the present invention.
Water lubriucated bearing friction coefficient measuring apparatus of the present invention mainly consists of the following components: meet the topworks of the vertical uniform load of large specific pressure bearing load, for ensureing the motor that the water circle device of the abundant cooling and lubricating of bearing and packoff, band moving axis system rotate and gearing, axle, bearing, the friction measurement device that designs based on force balance principle.This few part system utilizes pedestal, pipeline, bar girder construction to couple together, and constitutes whole water lubriucated bearing lubrication, rotation, loading, measuring process, thus realizes friction coefficient measurement.
Water lubriucated bearing friction coefficient measuring apparatus of the present invention shows through test findings, generally for 30kW motor, can be used for the bearing friction coefficient measurement of measuring below diameter 100mm, specific pressure below 0.8MPa, minimum speed 120r/min.This device is fexible unit, can according to the size adjustment power of motor of measured bearing diameter and bearing load, as having higher requirement to bearing load, can choose high power, high pulling torque motor to overcome bearing friction power, realize friction coefficient measurement.
The principal feature of water lubriucated bearing friction coefficient measuring apparatus of the present invention is: 1, by bearing load load maintainer 10 according to known load by bearing 50 jacking, until contact with the axle 40 in rotating, bearing 50 will produce rotating in same direction under friction force effect, and this rotation is limited completely by friction measurement device 60, and export measuring the power obtained, thus calculate moment of friction.2, the bearing load load maintainer 10 be made up of hydraulic cylinder, load bar, linear bearing, rolling bearing mechanism, realizes large load value-added tax function.Described hydraulic cylinder is arranged on public base, is followed successively by load sensor, load bar, rolling bearing mechanism from bottom to top.By hydraulic cylinder servo control mechanism, hydraulic cylinder jacking is contacted with load bar, load bar vertically moves upward under the location of linear bearing, uniform 5, load bar top rolling bearing is contacted with bearing case to be measured, according to bearing actual load by power vertically uniform load on bearing case to be measured.3, water tank and pump be arranged in below public base on and be connected by water pipe, the water pumped is up by pipeline, the gap entering axle and bearing through seal element is flowed out by the gland bonnet of the other end and collects, and imports drainpipe, forms the circulation of bearing lubrication aqueous medium.Be furnished with temperature sensor with water pipe entrance location in water tank, measure water temperature, and report to the police in temperature is higher than 40 degrees Celsius of situations.4, by motor and gearing 30, realize moment of torsion and export.5, friction measurement device 60 mainly utilizes force balance principle, when axle and bearing friction band dynamic bearing rotate, bearing is suppressed freely to rotate by arm bar, and be delivered to strain transducer by stressed, strain transducer is supported by the push rod that sectional area is relatively large, thus the friction force of axle and bearing is converted into foil gauge voltage signal, and signal is exported, try to achieve solution friction force according to the parameter such as torque arm length, axle journal.
Compared with prior art, the present invention has following beneficial effect:
(1) have employed hydraulic cylinder in conjunction with push rod, linear bearing, rolling bearing as charger, ensure that measured bearing is only subject to Plumb load power, achieve large load and load; Meanwhile, the method effectively prevent other spring bearing friction force to the interference of measurement result, achieves friction factor and accurately measures.
(2) have employed novel bearing friction coefficient measuring device, according to bearing load, rotation speed requirements, only adjust power of motor, strain transducer range and just can realize bearing friction coefficient in relative broad range and measure.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the A-A cut-open view of Fig. 1.
Fig. 4 is the B-B cut-open view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail.
Composition graphs 1-Fig. 4, water lubriucated bearing friction coefficient measuring apparatus of the present invention mainly comprises bearing load load maintainer 10, water circulation and packoff 20, motor and gearing 30, axle 40 and bearing 50, friction measurement device 60 and subsystem.
Described bearing load load maintainer 10 is made up of hydraulic cylinder 13, load sensor 14, load bar 15, linear bearing 16, loading rolling bearing mechanism 19.Hydraulic cylinder 13 is arranged on public base, is followed successively by load sensor 14, load bar 15, rolling bearing mechanism 19 from bottom to top, and wherein the level of load bar and axial displacement are retrained by linear bearing 16, only can catenary motion.
Described water circulation and packoff 20 are made up of circulating pipe system 23, pump 24, water tank 27, end cover 22.Water in water tank, through gap that water pipe import enters axle and bearing from bearing one end and bearing tank, flows out from the bearing other end, through water pipe reflow tank, in water tank and the temperature sensor of water pipe entrance location report to the police in temperature is higher than 40 degrees Celsius of situations.
Described motor and gearing 30 are made up of motor 2, pin coupler 4, rotary speed torque sensor 6, power of motor 30kW, motor and gearing 30 are arranged on common base 1, and common base 1 is soldering group component, can design according to actual installation situation.
Described friction measurement device 60 forms 64 by arm bar 61, strain transducer 63, push rod.The measurement range of this device for measuring force depends on the measurement range (this example is 3E6N) of strain transducer 63, can choose according to actual conditions.Described arm bar 61 is connected on bearing case, is connected with the strain transducer 63 of vertical layout by articulated elements 62, and described strain transducer is supported on common platform by push rod 64 is vertical, and is connected on common platform by set bolt 65.
After setting pre-loaded pressure, push rod jacking contacts with load bar 15 by hydraulic cylinder 13, load bar 15 vertically moves upward under the constraint of linear bearing 16,5 rolling bearings making load bar top uniform and bearing to be measured 50 housing contacts, thus according to bearing actual load, power is loaded on bearing 50 to be measured uniformly, bearing can be ensured only by radial force simultaneously, reduce the interference of other direction component.
Water circulation and packoff are according to the water temperature difference importing and exporting position, suitable adjustment water pump 24 flow, water in water tank 27 is extracted out, the gap entering axle and bearing from bearing one end through water pipe import and bearing tank, flow out from the bearing other end, through collecting box reflow tank, form the circulation of lubrication water.
Claims (9)
1. the device for low-speed heave-load water lubriucated bearing friction coefficient measurement, comprise bearing load load maintainer (10), water circulation and packoff (20), motor and gearing (30), axle (40), friction measurement device (60) and pedestal, it is characterized in that:
Described bearing load load maintainer (10) comprises hydraulic cylinder (13), load sensor (14), load bar (15) and loads rolling bearing mechanism (19), hydraulic cylinder (13) is arranged on base, load sensor (14) is arranged on load bar (15) lower end, rolling bearing mechanism (19) is arranged on load bar (15) upper end
Described water circulation and packoff (20) comprise circulation line (23), pump (24), water tank (27) and end cover (22), water in water tank is through gap that pump enters axle and bearing to be measured from bearing one end to be measured and bearing tank to be measured, reflow tank is flowed out from the bearing other end to be measured
Described motor and gearing (30) comprise motor (2), shaft coupling (4) and rotary speed torque sensor (6), motor arrangement is on pedestal (1), motor (2) is connected with the axle be arranged on pedestal (40) by shaft coupling (4), (6 (4 link rotary speed torque sensor with shaft coupling, (50 are installed on axle (40) bearing to be measured
Described friction measurement device (60) comprises arm bar (61), strain transducer (63), push rod (64), one end of arm bar (61) is connected on bearing case to be measured, the other end of arm bar (61) and the strain transducer (63) of vertical layout hinged, described strain transducer is supported on pedestal by push rod (64) is vertical.
2. the device for low-speed heave-load water lubriucated bearing friction coefficient measurement according to claim 1, is characterized in that: pedestal is arranged linear bearing (16), and load bar is retrained by linear bearing (16).
3. the device for low-speed heave-load water lubriucated bearing friction coefficient measurement according to claim 1 and 2, is characterized in that: described shaft coupling (4) is pin coupler.
4. the device for low-speed heave-load water lubriucated bearing friction coefficient measurement according to claim 1 and 2, is characterized in that: set temperature sensor in water tank (27).
5. the device for low-speed heave-load water lubriucated bearing friction coefficient measurement according to claim 3, is characterized in that: set temperature sensor in water tank (27).
6. the device for low-speed heave-load water lubriucated bearing friction coefficient measurement according to claim 1 and 2, is characterized in that: described loading rolling bearing mechanism is made up of 5 rolling bearings.
7. the device for low-speed heave-load water lubriucated bearing friction coefficient measurement according to claim 3, is characterized in that: described loading rolling bearing mechanism is made up of 5 rolling bearings.
8. the device for low-speed heave-load water lubriucated bearing friction coefficient measurement according to claim 4, is characterized in that: described loading rolling bearing mechanism is made up of 5 rolling bearings.
9. the device for low-speed heave-load water lubriucated bearing friction coefficient measurement according to claim 5, is characterized in that: described loading rolling bearing mechanism is made up of 5 rolling bearings.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510001284.0A CN104502271A (en) | 2015-01-04 | 2015-01-04 | Device for measuring friction coefficient of water-lubricated bearing with low speed and heavy load |
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| CN201510001284.0A CN104502271A (en) | 2015-01-04 | 2015-01-04 | Device for measuring friction coefficient of water-lubricated bearing with low speed and heavy load |
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Cited By (15)
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| CN105973601A (en) * | 2016-06-18 | 2016-09-28 | 上海大学 | Testing platform suitable for acceleration service life of rolling bearing |
| CN106442319A (en) * | 2016-12-06 | 2017-02-22 | 浙江工业大学 | Surface grinding testing machine |
| CN107436222A (en) * | 2017-07-28 | 2017-12-05 | 武汉船用机械有限责任公司 | A kind of field investigation device of hydraulic jet propulsion system |
| CN108168689A (en) * | 2017-12-04 | 2018-06-15 | 西北工业大学 | A kind of line contact roll sliding friction vibration noise testing stand and test analysis method |
| CN109238707A (en) * | 2018-10-31 | 2019-01-18 | 天津大学 | Vertical rolling bearing equlvalent coefficient of friction measuring device and method |
| CN109238709A (en) * | 2018-10-31 | 2019-01-18 | 天津大学 | A kind of rolling bearing equlvalent coefficient of friction measuring device and method |
| CN109238708A (en) * | 2018-10-31 | 2019-01-18 | 天津大学 | Horizontal type rolling bearing equlvalent coefficient of friction measuring device and method |
| CN109827899A (en) * | 2019-01-29 | 2019-05-31 | 兰州华汇仪器科技有限公司 | Material surface property tester |
| CN109883700A (en) * | 2019-03-27 | 2019-06-14 | 武汉理工大学 | Water lubricating rubber tail bearing frictional vibration test macro and its method |
| CN110501159A (en) * | 2019-07-31 | 2019-11-26 | 华中科技大学 | Locally than the experimental rig of pressure and Temperature Distribution in a kind of measurement water lubriucated bearing |
| CN111157377A (en) * | 2019-12-31 | 2020-05-15 | 中钢集团邢台机械轧辊有限公司 | Roller roughness retentivity testing machine |
| CN112146878A (en) * | 2020-10-10 | 2020-12-29 | 武汉理工大学 | Water-lubricated bearing friction and wear test platform and method for simulating silt working condition |
| CN112179842A (en) * | 2020-10-12 | 2021-01-05 | 大连理工大学 | Bearing friction coefficient measuring device |
| CN113267333A (en) * | 2021-07-19 | 2021-08-17 | 湖北东湖实验室 | Comprehensive performance testing device for shaftless pump jet propeller and using method thereof |
| CN113776829A (en) * | 2021-08-27 | 2021-12-10 | 上海交通大学 | Sliding bearing friction torque wireless measurement device and method |
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| CN105973601A (en) * | 2016-06-18 | 2016-09-28 | 上海大学 | Testing platform suitable for acceleration service life of rolling bearing |
| CN106442319A (en) * | 2016-12-06 | 2017-02-22 | 浙江工业大学 | Surface grinding testing machine |
| CN107436222B (en) * | 2017-07-28 | 2019-10-22 | 武汉船用机械有限责任公司 | A kind of field investigation device of hydraulic jet propulsion system |
| CN107436222A (en) * | 2017-07-28 | 2017-12-05 | 武汉船用机械有限责任公司 | A kind of field investigation device of hydraulic jet propulsion system |
| CN108168689A (en) * | 2017-12-04 | 2018-06-15 | 西北工业大学 | A kind of line contact roll sliding friction vibration noise testing stand and test analysis method |
| CN109238707A (en) * | 2018-10-31 | 2019-01-18 | 天津大学 | Vertical rolling bearing equlvalent coefficient of friction measuring device and method |
| CN109238709B (en) * | 2018-10-31 | 2020-09-01 | 天津大学 | Device and method for measuring equivalent friction coefficient of rolling bearing |
| CN109238708A (en) * | 2018-10-31 | 2019-01-18 | 天津大学 | Horizontal type rolling bearing equlvalent coefficient of friction measuring device and method |
| CN109238709A (en) * | 2018-10-31 | 2019-01-18 | 天津大学 | A kind of rolling bearing equlvalent coefficient of friction measuring device and method |
| CN109827899A (en) * | 2019-01-29 | 2019-05-31 | 兰州华汇仪器科技有限公司 | Material surface property tester |
| CN109827899B (en) * | 2019-01-29 | 2024-04-12 | 兰州华汇仪器科技有限公司 | Material surface property tester |
| CN109883700A (en) * | 2019-03-27 | 2019-06-14 | 武汉理工大学 | Water lubricating rubber tail bearing frictional vibration test macro and its method |
| CN109883700B (en) * | 2019-03-27 | 2021-03-05 | 武汉理工大学 | Water-lubricated rubber tail bearing friction vibration testing system and method thereof |
| CN110501159A (en) * | 2019-07-31 | 2019-11-26 | 华中科技大学 | Locally than the experimental rig of pressure and Temperature Distribution in a kind of measurement water lubriucated bearing |
| CN111157377A (en) * | 2019-12-31 | 2020-05-15 | 中钢集团邢台机械轧辊有限公司 | Roller roughness retentivity testing machine |
| CN111157377B (en) * | 2019-12-31 | 2023-10-20 | 中钢集团邢台机械轧辊有限公司 | Roller roughness retention testing machine |
| CN112146878A (en) * | 2020-10-10 | 2020-12-29 | 武汉理工大学 | Water-lubricated bearing friction and wear test platform and method for simulating silt working condition |
| CN112179842A (en) * | 2020-10-12 | 2021-01-05 | 大连理工大学 | Bearing friction coefficient measuring device |
| CN113267333A (en) * | 2021-07-19 | 2021-08-17 | 湖北东湖实验室 | Comprehensive performance testing device for shaftless pump jet propeller and using method thereof |
| CN113267333B (en) * | 2021-07-19 | 2021-09-24 | 湖北东湖实验室 | Comprehensive performance testing device for shaftless pump jet propeller and using method thereof |
| CN113776829A (en) * | 2021-08-27 | 2021-12-10 | 上海交通大学 | Sliding bearing friction torque wireless measurement device and method |
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Application publication date: 20150408 |