CN113092281A - Flat elevator traveling cable service life accelerated evaluation test method - Google Patents
Flat elevator traveling cable service life accelerated evaluation test method Download PDFInfo
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- CN113092281A CN113092281A CN202110334446.8A CN202110334446A CN113092281A CN 113092281 A CN113092281 A CN 113092281A CN 202110334446 A CN202110334446 A CN 202110334446A CN 113092281 A CN113092281 A CN 113092281A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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Abstract
The invention discloses a test method for the accelerated evaluation of the service life of a traveling cable of a flat elevator, which comprises the following steps: measuring the accelerated bending life times of the traveling cables of the same specification of the elevator under different bending radii; measuring the accelerated bending life times of elevator traveling cables of different specifications under different bending radii; measuring the vertical bending life times of the elevator traveling cables with different specifications under the standard bending diameter; drawing an accelerated bending life curve graph of different specifications under different bending diameters; drawing a relation curve graph of the accelerated bending life times and the vertical bending life times; and (4) actually measuring the accelerated bending life of the newly developed elevator traveling cable, and evaluating the running life of the cable by using a relation curve graph. The invention can conveniently realize the operation life evaluation of the elevator traveling cable in a short time, obviously shorten the development period and reduce the development cost.
Description
Technical Field
The invention relates to the technical field of service life evaluation of elevator traveling cables.
Background
The running life of the elevator cable is directly related to the safety of an elevator system, and is a very concerned problem, so the elevator cable needs to be subjected to a bending life test for simulating running in a development stage, and particularly, a high-rise high-speed elevator cable is a necessary project. However, the bending life test period of the simulated operation is too long, so that elevator whole elevator manufacturers and trailing cable manufacturers are troubled all the time, and new cables of new elevator types cannot be put into batch production in time. A test period of around three months is still required, the test period is still relatively long, and the user still cannot fully accept the test results of accelerated bending life to represent an evaluation of the vertical simulated operating life. In addition, a three-month cycle is more inconvenient for material verification during development, particularly at an early development stage.
Disclosure of Invention
The invention aims to provide a test method for the accelerated evaluation of the bending life of a flat elevator traveling cable, which can conveniently and quickly evaluate the operation life of the elevator traveling cable. By the method, the bending life of the cable can be directly evaluated by the accelerated bending life, the scientificity and the credibility are increased, the early development period is greatly shortened, and the development cost is reduced.
The technical scheme for realizing the purpose is as follows:
a service life accelerated evaluation test method for a traveling cable of a flat elevator comprises the following steps:
step S1, measuring the accelerated bending life times of the traveling cables of the same specification of the elevator under different bending radii;
step S2, measuring the accelerated bending life times of elevator traveling cables with different specifications under different bending radii;
step S3, measuring the vertical bending life times of the elevator traveling cables with different specifications under the standard bending diameter;
step S4, drawing accelerated bending life graphs under different bending diameters according to the results obtained in the step S1 and the step S2;
step S5, drawing a relation graph of the accelerated bending life time and the vertical bending life time according to the obtained results of the step S3 and the step S4;
and step S6, measuring the accelerated bending service life of the newly developed elevator traveling cable actually, and evaluating the service life of the cable by using the relation curve graph.
Preferably, in the accelerated bending lifetime graph, the abscissa X represents an accelerated bending diameter, the ordinate Y represents the number of accelerated bending lifetimes, and the Y-axis coordinate is an exponential expression with units of ten thousand. And (3) representing elevator traveling cables with different specifications by using a plurality of groups of curves.
Preferably, in the relation graph, an abscissa X represents the number of accelerated bending life times, and the abscissa is an exponential and has a unit of ten thousand times; the ordinate Y represents the number of vertical bending life times in a linear form in units of ten thousand, and the multiple sets of curves represent life characteristics of different bending diameters of the same specification or specification group.
Preferably, the different gauges may be a plurality of individual cable gauges or gauge groups of similar structural series.
The invention has the beneficial effects that: the invention is used for the service life evaluation of the cable product in the design stage and the shaping stage, can quickly evaluate the vertical operation bending service life of the cable by only selecting the accelerated service life test suitable for the bending diameter, is convenient and quick, has lower cost, can obviously shorten the product development period, and saves the development cost. The product range of life evaluation can be expanded by using the research results of a plurality of specification groups. The method has important significance for improving the reliability of the actual operation of the elevator cable project.
Drawings
FIG. 1 is a flow chart of the test method for the accelerated service life evaluation of the traveling cable of the flat elevator of the invention;
FIG. 2 is a graph of accelerated bend life in accordance with the present invention;
FIG. 3 is a graph of the relationship of the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
Referring to fig. 1, the method for testing the service life of a traveling cable of a flat elevator comprises the following steps:
and step S1, measuring the accelerated bending life times of the traveling cables of the same specification of the elevator under different bending radii.
And step S2, measuring the accelerated bending life times of the elevator traveling cables with different specifications under different bending radii. The different specifications may be a plurality of individual cable specifications or groups of specifications of similar structural families;
and step S3, measuring the vertical bending life times of the elevator traveling cables with different specifications under the standard bending diameter.
And step S4, drawing an accelerated bending life curve chart under different bending diameters according to the results obtained in the step S1 and the step S2. As shown in fig. 2, the abscissa X represents the accelerated bending diameter, the ordinate Y represents the number of accelerated bending lives, and the Y-axis coordinate is an exponential expression with the unit of ten thousand. And (3) representing elevator traveling cables with different specifications by using a plurality of groups of curves.
In step S5, a graph is plotted showing the relationship between the number of accelerated bending lives and the number of vertical bending lives according to the results of steps S3 and S4. As shown in fig. 3, in the graph, the abscissa X represents the number of accelerated bending life, and the abscissa is an exponential expression with unit of ten thousand; the ordinate Y represents the number of vertical bending life times in a linear form in units of ten thousand, and the multiple sets of curves represent life characteristics of different bending diameters of the same specification or specification group.
And step S6, the accelerated bending service life of the newly developed elevator traveling cable with a certain bending diameter is measured, the corresponding specification or specification group is selected, and the service life of the cable is directly evaluated according to the relation curve chart.
In conclusion, the development period of a new product can be obviously shortened, the development cost is reduced, the product range of service life evaluation can be expanded by utilizing the research results of a plurality of specification groups, and the method has important significance for improving the reliability of the actual operation of the elevator cable project.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (4)
1. A service life accelerated evaluation test method for a traveling cable of a flat elevator is characterized by comprising the following steps:
step S1, measuring the accelerated bending life times of the traveling cables of the same specification of the elevator under different bending radii;
step S2, measuring the accelerated bending life times of elevator traveling cables with different specifications under different bending radii;
step S3, measuring the vertical bending life times of the elevator traveling cables with different specifications under the standard bending diameter;
step S4, drawing accelerated bending life graphs under different bending diameters according to the results obtained in the step S1 and the step S2;
step S5, drawing a relation graph of the accelerated bending life time and the vertical bending life time according to the obtained results of the step S3 and the step S4;
and step S6, measuring the accelerated bending service life of the newly developed elevator traveling cable actually, and evaluating the service life of the cable by using the relation curve graph.
2. The flat elevator traveling cable service life accelerated evaluation test method according to claim 1, characterized in that in the accelerated bending service life graph, the abscissa X represents the accelerated bending diameter, the ordinate Y represents the number of accelerated bending service lives, and the coordinate of the Y axis is exponential, with the unit being ten thousand times; the multiple sets of curves represent elevator trailing cables of different specifications.
3. The flat elevator traveling cable service life accelerated evaluation test method according to claim 1, characterized in that in the graph of relationship between accelerated bending service life and vertical bending service life, the abscissa X represents the number of accelerated bending service life, and the abscissa is exponential and has unit of ten thousand; the ordinate Y represents the number of vertical bending life times in a linear form in units of ten thousand, and the multiple sets of curves represent life characteristics of different bending diameters of the same specification or specification group.
4. The method as claimed in claim 1, wherein the different specifications are a plurality of individual cable specifications or a specification group of similar structure series.
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