CN104150303B - Multifunctional lift traction-driven friction testing arrangement and method of testing - Google Patents
Multifunctional lift traction-driven friction testing arrangement and method of testing Download PDFInfo
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- CN104150303B CN104150303B CN201310176077.XA CN201310176077A CN104150303B CN 104150303 B CN104150303 B CN 104150303B CN 201310176077 A CN201310176077 A CN 201310176077A CN 104150303 B CN104150303 B CN 104150303B
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Abstract
Elevator traction gearing friction disclosed by the invention test device and method of testing.After its steel wire rope is walked around traction sheave and adjusted cornerite by directive wheel, two ends are sequentially connected with pulling force sensor and stretching spring, and stretching spring is installed on the fixed position loading pedestal.Loading pedestal by Driven by Hydraulic Cylinder to move axially along guide post, cause stretching spring elongation strain, gained elastic force is used for producing steel wire rope tension.Utilize driven by motor traction sheave the most slowly to rotate, cause traction sheave both sides rope capacity to change, by stretching the change of spring power, form, in the steel wire rope of traction sheave both sides, the Tension Difference persistently increased.When occurring skidding, Tension Difference maximum is maximum static friction force.The present invention operates simply, safety, so that static friction can be carried out continuously with sliding friction test, and motor does not exist stall phenomenon.
Description
Technical field
The present invention relates to the apparatus and method of a kind of field of mechanical technique, specifically a kind of multifunctional lift traction-driven friction testing arrangement and method of testing.
Background technology
Elevator traction system utilizes fricative traction between steel wire rope and traction race to drive car to run up and down, and traction being chosen by the coefficient of friction between steel wire rope and traction race and being calculated, and is directly connected to the safety that elevator runs.
The reference value of coefficient of friction, according to the operating condition of elevator, is specified by GB/T 7588-2003 " elevator manufacture and installation safety standard ".But, under actual elevator operating condition, coefficient of friction can change with rope material, baudrier etc. along with lubricating condition, steel cord structure, rope sheave.Shanghai Communications University doctor Zhang Peng simulates actual condition and studies coefficient of friction, and result of study confirms above-mentioned phenomenon.Therefore, the change of traction condition, the deviation of traction theoretical value and actual value may be caused.The paper " improving the analysis of cases of elevator traction condition by adjusting cornerite " delivered on 9th phase in 2012 " China's elevator " was once reported, traction coincidence theory under the conditions of steel wire rope after-combustion calculates, ought to occur skidding under being detained operating mode, but the skidding estimated does not occurs when actually detected, clearly the actual value of traction is significantly higher than value of calculation so that detect defective.Therefore, simulation actual condition carries out the research of coefficient of friction, to the reasonability improving traction Design Theory, it is ensured that elevator traction has important practical significance safely.
Through the literature search of prior art is found, Chinese patent entitled " elevator dray driving sliding contact fatigue wear testing machine ", notification number is CN100483105C, disclose a kind of elevator dray driving sliding contact fatigue wear testing machine, this equipment adjusts contact cornerite by changing steel wire rope one end installation site in arc frame, and loads handwheel by manual rotation and adjust steel wire rope other end stress and change load.
Chinese patent entitled " gasket sliding friction testing machine for mine friction hoisting machine ", number of patent application is 201110436607.0, disclose a kind of gasket sliding friction testing machine for mine friction hoisting machine, in the art, frame is fixed on by pulling force sensor in steel wire rope one end, and the other end is connected to be fixed on the hydraulic cylinder of frame.
In test, the steel wire rope installation site of above-mentioned two patents is all fixed relative to frame, by friction pulley active rotation to produce sliding friction.If using the said equipment in static friction is tested, then requiring that traction sheave keeps geo-stationary with frame, causing motor to be in locked rotor condition, reducing service life of equipment.
Additionally, in number of patent application is technical scheme described in 201110436607.0, it is impossible to traction sheave cornerite is adjusted.
Chinese patent entitled " multifunctional friction hoisting antiskid experimental device and method ", Patent No. 200810010174.7, which disclose a kind of multifunctional friction hoisting antiskid experimental device and method, this equipment needs to carry out steel wire rope tension regulation by interpolation weight, the regulation of friction pulley both sides steel wire rope tension difference is carried out by the form that steel wire rope is applied additional friction, operation is complicated dumb, and after an offered load, steel wire rope tension difference range of accommodation is limited.If additionally, interpolation weight is unreasonable or operation sequence error, heavy lift may be caused because of brake fade or fall and cause security incident.
Chinese patent entitled " elevator armored rope bending fatigue state experimental bench ", Patent No. CN101216397B, which disclose a kind of elevator armored rope bending fatigue state experimental bench, wherein steel wire rope forms a Guan Bi ring by fag end attachment means.
The author of Sinology degree thesis whole-length " theoretical and experimental study of express elevator suspension dynamic property " uses the carried equipment of patent CN101216397B to carry out the experiment of traction steel-cable coefficient of friction.In the carried method of testing of this paper, traction sheave is locked, and a moveable trailer wagon is fixed in cable wire end attachment means, is put on the pull strength of trailer wagon by change, triggers the sliding friction between steel wire rope and traction sheave.But due to the existence of cable wire end attachment means, causing steel wire rope change location limited, static friction test and sliding friction test must separately be carried out, it is difficult to be used for studying behavior during transition between static friction and sliding friction.
Summary of the invention
In place of it is an object of the invention to overcome the deficiencies in the prior art, provide a kind of multifunctional lift traction-driven friction testing arrangement and method of testing, in order to measure the frictional force meeting between the traction sheave of actual condition and steel wire rope, make Study on Friction Coefficient more scientific, and then improve the reasonability that traction calculates.
In order to realize the purpose of the present invention, the present invention can be by the following technical solutions:
Multifunctional lift traction-driven friction testing arrangement, including:
One frame；
One axle is located at the traction sheave in described frame；
One drives the traction motor that described traction sheave rotates, and this traction motor is arranged in described frame；
A piece steel wire rope being looped around on described traction sheave；It is characterized in that, also include:
One is arranged on the hydraulic cylinder in described frame；
One slide arrangement loading pedestal in described frame, described loading pedestal is connected with the push rod of described hydraulic cylinder, by loading base motion described in this Driven by Hydraulic Cylinder；
One end of described steel wire rope is connected on described loading pedestal by the first pulling force sensor and the first tension spring, and the other end of steel wire rope is connected on described loading pedestal by the second pulling force sensor and the second tension spring；
One experimental monitor, the signal input part of this experimental monitor is connected with described first, second pulling force sensor；
One controlled hydraulic output device, described controlled hydraulic output device is controlled by described experimental monitor and is connected with described hydraulic cylinder by oil pipe；
One motor driver, described motor driver is controlled by described experimental monitor and drives traction motor to work.
In a preferred embodiment of the invention, being provided with a pair guide post in described frame, described loading pedestal slide arrangement is on the pair of guide post.
In a preferred embodiment of the invention, the axis of a pair guide post is parallel with the axis of described hydraulic cylinder.
In a preferred embodiment of the invention, also including that a steel wire rope guiding parts, described steel wire rope guiding parts are arranged on described traction sheave and load between pedestal, described steel wire rope is guided by described steel wire rope guiding parts.
Described steel wire rope guiding parts includes the directive wheel that a directive wheel pedestal and a pair pair of steel wire rope play the guiding role, described directive wheel pedestal is arranged in described frame, and on described directive wheel pedestal, offer the directive wheel mounting groove of a strip, the wheel shaft of a pair directive wheel is arranged in directive wheel mounting groove, so as the centre-to-centre spacing adjusted between a pair directive wheel, and then regulation steel wire rope cornerite on the traction sheave.
In a preferred embodiment of the invention, the rigidity of described first tension spring and the second tension spring is unequal.
In a preferred embodiment of the invention, the first tension spring and the second tension spring directly hook on the hook seat loading pedestal.
The method of testing using above-mentioned multifunctional lift traction-driven friction testing arrangement is as follows:
Arrange according to testing tension parameter, set hydraulic cylinder overhang, utilize Driven by Hydraulic Cylinder to make loading pedestal move to stretching tension spring direction along guide post, produce elastic force by tension spring elongation strain and make steel wire rope obtain load tension；Experimental monitor controls traction motor by motor driver and slowly works, and slowly rotates traction sheave so that traction sheave both sides rope capacity changes, and causes tension spring elongation to change, and promotes to be formed between the steel wire rope of traction sheave both sides Tension Difference；Traction sheave continues in rotation process, utilizes experimental monitor to pass through controlled hydraulic output device and controls hydraulic cylinder, keeps loading constant or the unilateral steel wire rope tension of traction sheave is constant, until skidding；After skidding, proceed continuously slipping friction test or utilize the sudden change relation between stiction and force of sliding friction, stopping traction sheave and rotate；Traction sheave is in time starting to turn to steel wire rope with traction sheave generation skidding, and traction sheave both sides steel wire rope tension difference maximum is maximum static friction force, and when steel wire rope and traction sheave skid continuously, Tension Difference stationary value is force of sliding friction.Traction sheave both sides steel wire rope tension is detected by the first pulling force sensor and the second pulling force sensor, and the traction sheave both sides steel wire rope tension value detected is input in experimental monitor.
In a preferred embodiment of the method for testing of the present invention, utilize the freely rotatable of traction sheave, traction sheave both sides steel wire rope tension can be made to reach poised state before traction sheave rotates.
In a preferred embodiment of the method for testing of the present invention, during friction testing, by the continuous rotation of traction sheave so that traction sheave both sides rope capacity consecutive variations, and cause stretching spring power consecutive variations further, promote traction sheave both sides steel wire rope tension difference consecutive variations.
The present invention has the beneficial effect that:
1, test method is simple and reliable, testing equipment processing ease, safety height；
2, static friction process of the test drives traction motor can rotate continuously, there is not stall phenomenon；
3, friction test can be transitioned into sliding friction test from static friction test Automatic continuous, can effectively carry out frictional force transition behavioral study；
4, automatically can carry out loading control by controlling the elongation of hydraulic cylinder, loading range is adjustable, and ensure that the tension force of traction sheave side steel wire rope is definite value, makes frictional force analysis and research work more comprehensive；
5, utilize pulling force sensor to directly obtain the tension value of traction sheave both sides steel wire rope, eliminate tension force distributor gear.
Accompanying drawing explanation
Fig. 1 is the structural representation of multifunctional lift traction-driven friction testing arrangement of the present invention.
Fig. 2 is the directive wheel base construction schematic diagram of steel wire rope guiding parts of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the invention are elaborated: the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1 and Figure 2, the multifunctional lift traction-driven friction testing arrangement be given in figure includes a frame 19, is provided with a traction sheave 1 in frame 19 upper shaft and is provided with 5, steel wire rope guiding parts of a hydraulic cylinder, a pair guide post 8,10.Traction sheave 1 relies on the traction motor 17 being arranged in frame 19 to drive, and traction motor 17 is controlled by motor driver 16, and motor driver 16 is controlled by an experimental monitor 13.The movement velocity of motor 17 is controlled by motor driver 16 according to the controlled quentity controlled variable of experimental monitor 13.
Two ends after traction sheave 1 walked around by steel wire rope 4 respectively connect a pulling force sensor 6,12, and pulling force sensor 6,12 is connected to load on pedestal 9 by tension spring 7,11 respectively, and connected mode is directly to be hooked on the hook seat loaded on pedestal 9 by tension spring 7,11.Loading pedestal 9 to be slidably mounted on a pair guide post 8,10, the push rod of hydraulic cylinder 5 is connected with loading pedestal 9, and the motion of this loading pedestal 9 relies on hydraulic cylinder 5 to carry out.
In this specific embodiment, the axis of a pair guide post 8,10 is parallel with the axis of hydraulic cylinder 5, and when hydraulic cylinder 5 works, the push rod in hydraulic cylinder 5 promotes loading pedestal 9 to move along a pair guide post 8,10.Hydraulic cylinder 5 is controlled by controlled hydraulic output device 14, and controlled hydraulic output device 14 is controlled by experimental monitor 13.The tension value at steel wire rope 4 two ends detected by pulling force sensor 6,12 is input in experimental monitor 13.The elongation of hydraulic cylinder 5 is controlled by controlled hydraulic output device 14 according to the controlled quentity controlled variable of experimental monitor 13.
Steel wire rope guiding parts is arranged on traction sheave 1 and loads between pedestal 9, and steel wire rope guiding parts guides the cornerite regulating steel wire rope 4 on traction sheave 1 to steel wire rope 4.
Steel wire rope guiding parts includes the directive wheel 3,15 that a directive wheel pedestal 2 and a pair pair of steel wire rope 4 play the guiding role, directive wheel pedestal 2 is arranged in frame 19, and on directive wheel pedestal 2, offer the directive wheel mounting groove 18 of a strip, the wheel shaft of a pair directive wheel 3,15 is arranged in directive wheel mounting groove 18, thus the centre-to-centre spacing between a pair directive wheel 3,15 can be adjusted, and then the regulation steel wire rope 4 cornerite on traction sheave 1.
During the present embodiment work, starting before Friction Force test, by traction motor 1 power-off and cancel concerned brake so that the traction sheave 5 being connected with traction motor 1 is in freely rotatable state；According to test parameters, adjust the directive wheel 3,15 installation site in the mounting groove 18 of directive wheel pedestal 2 to obtain the steel wire rope 4 cornerite on traction sheave 5；According to test parameters, set the elongation of hydraulic cylinder 5, utilize hydraulic cylinder 5 drive load pedestal 9 to move along stretching tension spring 7,11 direction along guide post 8,10.
Producing elastic force after tension spring 7,11 elongation strain, this elastic force can make the steel wire rope 4 being positioned at traction sheave 5 both sides obtain load tension；Freely rotatable by traction sheave 5 so that the tension force in the steel wire rope 4 of traction sheave 5 both sides reaches balance；After equalization of strain, start traction motor 1, utilizing motor driver 16 to drive traction motor 1 to drive traction sheave 5 slowly to rotate, utilize experimental monitor 13 to record the reading of pulling force sensor 6,12, pulling force sensor 6,12 reading difference is traction sheave 5 both sides steel wire rope 4 Tension Difference.
Traction sheave 5 continues in rotation process, and traction sheave 5 both sides steel wire rope 4 length changes, and causes tension spring 7,11 elongation to change, and promotes to be formed between traction sheave 5 both sides steel wire rope 4 Tension Difference；Traction sheave 5 continues, in rotation process, to utilize experimental monitor 13, control hydraulic cylinder 5 by controlled hydraulic output device 14 and move, and keeps load constant or unilateral steel wire rope 4 constant tension of traction sheave 5, until skidding；After skidding, sliding friction test can be proceeded, or utilize the sudden change relation between stiction and force of sliding friction, traction sheave 5 is braked；Traction sheave 5 is in time starting to turn to steel wire rope 4 with traction sheave 5 generation skidding, and traction sheave 5 both sides steel wire rope 4 Tension Difference maximum is maximum static friction force, and when steel wire rope 4 and traction sheave 5 skid continuously, Tension Difference stationary value is force of sliding friction；After off-test, regain hydraulic cylinder 5, hydraulic cylinder 5 drives loading pedestal 9 to move along guide post 8,10 to shortening tension spring 7,11 direction, tension spring 7,11 length is recovered, elimination steel wire rope loads, or by traction motor 1 power-off and cancel concerned brake so that the traction sheave 5 being connected with traction motor 1 is in freely rotatable state, by the Tension Difference in the freely rotatable elimination steel wire rope 4 of traction sheave 5.
Claims (10)
1. multifunctional lift traction-driven friction testing arrangement, including:
One frame；
One axle is located at the traction sheave in described frame；
One drives the traction motor that described traction sheave rotates, and this traction motor is arranged on described frame
On；
A piece steel wire rope being looped around on described traction sheave；It is characterized in that, also include:
One is arranged on the hydraulic cylinder in described frame；
One slide arrangement loading pedestal in described frame, described loading pedestal and described hydraulic pressure
The push rod of cylinder connects, by loading base motion described in this Driven by Hydraulic Cylinder；
One end of described steel wire rope is connected to by the first pulling force sensor and the first tension spring
On described loading pedestal, the other end of steel wire rope passes through the second pulling force sensor and the second pulling force bullet
Spring is connected on described loading pedestal；
One experimental monitor, the signal input part of this experimental monitor with described first, the
Two pulling force sensors connect；
One controlled hydraulic output device, described controlled hydraulic output device is filled by described test monitoring
Put control and be connected with described hydraulic cylinder by oil pipe；
One motor driver, described motor driver is controlled by described experimental monitor also
Driving traction motor works.
2. multifunctional lift traction-driven friction testing arrangement as claimed in claim 1, it is special
Levying and be, be provided with a pair guide post in described frame, described loading pedestal slide arrangement exists
On the pair of guide post.
3. multifunctional lift traction-driven friction testing arrangement as claimed in claim 2, it is special
Levying and be, the axis of a pair guide post is parallel with the axis of described hydraulic cylinder.
4. the multifunctional lift traction-driven friction testing dress as described in claim 1 or 2 or 3
Put, it is characterised in that also include that a steel wire rope guiding parts, described steel wire rope guiding parts set
Putting at described traction sheave and load between pedestal, described steel wire rope guiding parts is to described steel wire rope
Guide.
5. multifunctional lift traction-driven friction testing arrangement as claimed in claim 4, it is special
Levying and be, described steel wire rope guiding parts includes that a directive wheel pedestal and a pair pair of steel wire rope rise and lead
To the directive wheel of effect, described directive wheel pedestal is arranged in described frame, and in described guiding
Offering the directive wheel mounting groove of a strip on wheel pedestal, the wheel shaft of a pair directive wheel is arranged on
In directive wheel mounting groove, in order to adjust the centre-to-centre spacing between a pair directive wheel, and then regulation steel wire
Rope cornerite on the traction sheave.
6. multifunctional lift traction-driven friction testing arrangement as claimed in claim 1, it is special
Levying and be, the rigidity of described first tension spring and the second tension spring is unequal.
7. multifunctional lift traction-driven friction testing arrangement as claimed in claim 1, it is special
Levying and be, the first tension spring and the second tension spring directly hook on the hook seat loading pedestal.
8. the test of the multifunctional lift traction-driven friction testing arrangement described in claim 1
Method, it is characterised in that specific as follows:
Arrange according to testing tension parameter, set hydraulic cylinder overhang, utilize hydraulic pressure along guide post
Cylinder drives and makes loading pedestal move, by tension spring elongation strain to stretching tension spring direction
Producing elastic force makes steel wire rope obtain load tension；Experimental monitor drives dress by motor
Put control traction motor slowly to work, slowly rotate traction sheave so that traction sheave both sides steel wire rope
Length changes, and causes tension spring elongation to change, and promotes traction sheave both sides steel
Tension Difference is formed between cord；Traction sheave continues, in rotation process, to utilize experimental monitor to pass through
Controlled hydraulic output device controls hydraulic cylinder, keeps loading the constant or unilateral steel wire of traction sheave
Rope tension is constant, until skidding；After skidding, proceed continuously slipping friction examination
Test or utilize the sudden change relation between stiction and force of sliding friction, stop traction sheave and rotate；
Traction sheave from start to turn to steel wire rope occur to skid with traction sheave time, traction sheave both sides steel wire rope
Tension Difference maximum is maximum static friction force, when steel wire rope and traction sheave skid continuously, and tension force
Difference stationary value is force of sliding friction；Traction sheave both sides steel wire rope tension passes through the first pull sensing
Device and the second pulling force sensor detect, and the traction sheave both sides steel wire rope tension value detected is defeated
Enter in experimental monitor.
9. method of testing as claimed in claim 8, it is characterised in that utilize traction sheave from
By rotating, traction sheave both sides steel wire rope tension can be made to reach equilibrium-like before traction sheave rotates
State.
10. method of testing as claimed in claim 8, it is characterised in that during friction testing,
By the continuous rotation of traction sheave so that traction sheave both sides rope capacity consecutive variations, go forward side by side
One step causes stretching spring power consecutive variations, promotes traction sheave both sides steel wire rope tension difference even
Continuous change.
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| CN201310176077.XA CN104150303B (en) | 2013-05-13 | 2013-05-13 | Multifunctional lift traction-driven friction testing arrangement and method of testing |
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| CN201310176077.XA CN104150303B (en) | 2013-05-13 | 2013-05-13 | Multifunctional lift traction-driven friction testing arrangement and method of testing |
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| CN104150303B true CN104150303B (en) | 2016-08-10 |
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