CN203414395U - Device for measuring rope friction coefficients - Google Patents
Device for measuring rope friction coefficients Download PDFInfo
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- CN203414395U CN203414395U CN201320365418.3U CN201320365418U CN203414395U CN 203414395 U CN203414395 U CN 203414395U CN 201320365418 U CN201320365418 U CN 201320365418U CN 203414395 U CN203414395 U CN 203414395U
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- rope
- friction factor
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- wiring cylinder
- force
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Abstract
The utility model discloses a device for measuring rope friction coefficients. The device comprises a motor (1), a gearbox (2), a rope winding cylinder (5), a force transducer (4), a force-measuring display (3) and a standard tension weight (7), wherein the motor (1), the gearbox (2) and the rope winding cylinder (5) are connected in sequence; the force transducer (4) is connected with the force-measuring display (3); a rope sample (6) is wound on the rope winding cylinder (5); one end of the rope sample (6) is connected with the standard tension weight (7); the other end of the standard tension weight (7) is connected with the force transducer (4). The device has the advantages that the structure is simple; the cost is low; the operation is convenient; the device is practical; the accurate friction coefficient of the rope sample can be obtained by calculating the pulling force, measured by the force transducer, of one end of the rope sample and the gravity of the standard tension weight connected with the other end of the rope sample according to the Euler formula in the physical science.
Description
Technical field
The utility model relates to rope field, specifically a kind of measurement mechanism of rope friction factor.
Background technology
At present, for rope goods people, be more that what to pay close attention to is its ultimate strength, breaking elongation, line density etc., and a lot of manufacturer does not establish enough consciousness to the frictional behaviour of rope.But complicated along with the variation of rope goods kind and function and the expansion of range of application and applied environment, make the requirement of rope no longer merely be confined to powerful grade for basic index, as the application in fields such as fire-fighting, escape, rock-climbing, military affairs, rescues, what more focus on is the opposing frictional behaviour of rope.
The frictional resistance of rope goods and friction factor can be used for representing the frictional behaviour of rope, and lack relevant testing tool for the measurement of rope friction factor is domestic, and other industry is as the testing tool of the friction factor in textile industry and be not suitable for the measurement of rope friction factor.Therefore in order to guarantee that rope band gives full play to its safety guarantee effect in each side such as productions, lives, be necessary to research and develop a kind of surveying instrument about rope friction factor.
Summary of the invention
For solving the technical matters of above-mentioned existence, the utility model provides a kind of measurement mechanism of rope friction factor, simple in structure, with low cost, convenient and practical, the friction factor of Measurement accuracy rope.
The utility model solves the technical scheme that its technical matters adopts:
A kind of measurement mechanism of rope friction factor, comprise motor, wheel box, wiring cylinder, force cell, dynamometry display and standard tension force weight, described motor, wheel box, wiring cylinder connect in turn, described force cell is connected with dynamometry display, during measurement, rope sample is set around on wiring cylinder, and rope sample one end connection standard tension force weight, the other end connect force cell.
The material of described wiring cylinder is a kind of in steel, pottery, covered fiber.
The range of size of described wiring drum diameter is 15-30cm.
Described standard weight has 0.5kg, 1 kg, 1.5 kg, 2 kg, five kinds of models of 2.5 kg.
The winding number of turns for wiring cylinder of described rope sample is 2-5 circle.
The utility model is simple in structure, and cost is low, convenient and practical, according to physics Euler's formula, measures the pulling force of rope sample one end by force cell, then the gravity of the standard tension force weight connecting according to its other end, calculates accurate rope friction factor.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
In figure: 1. motor; 2. wheel box; 3. dynamometry display; 4. force cell; 5. wiring cylinder; 6. rope sample; 7. standard tension force weight.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail:
Be illustrated in figure 1 specific embodiment of the utility model, the measurement mechanism of this rope friction factor, comprise motor 1, wheel box 2, wiring cylinder 5, force cell 4, dynamometry display 3 and standard tension force weight 7, described motor 1, wheel box 2, wiring cylinder 5 connect in turn, described force cell 4 is connected with dynamometry display 3, during measurement, rope sample 6 is set around on wiring cylinder 5, and rope sample 6 one end connection standard tension force weights 7, the other end connect force cell 4.
The material of described wiring cylinder 5 is a kind of in steel, pottery, covered fiber, and the range of size of diameter is 15-30cm.
Described standard weight 7 has 0.5kg, 1 kg, 1.5 kg, 2 kg, five kinds of models of 2.5 kg.
The winding number of turns for wiring cylinder 5 of described rope sample 6 is 2-5 circle.
In the present embodiment, the running part that motor 1 and wheel box 2 are measurement mechanism, for measurement mechanism provides power and controls its running speed, force cell 4 and dynamometry display 3 are used for measuring the tension force of rope sample 6 and showing, wiring cylinder 5 is critical pieces of rope sample 6 effects, and standard tension force weight 7 is in order to demarcate the friction coefficient measurement value of rope.
During measurement, rope sample 6 is wound around to 5 liang of circles of wiring cylinder, its upper end connects force cell 4, lower end connection standard tension force weight 7, starter motor 1, wiring cylinder 5 is done motion at the uniform velocity clockwise, regulate its rotating speed, make measurement system reach balance, when rope sample 6 positions with when in stable condition, record the numerical value f of the pulling force showing in dynamometry display
1.
According to Euler's formula
t 2 / T 1 =e μ θ draw friction factor
μ=(ln T 2 -ln T 1 )/θ
Wherein
t 2 for the tension force of tight end rope, the gravity of standard tension force weight namely,
t 2 =mg=9.8N;
t 1 tension force for pine end rope
t 1 =f
1, unit is N;
θ=2
π.
For the ease of calculating, natural logarithm ln is converted to and take the 10 common logarithm lg that are the end, can obtain:
μ=0.367×（
lg?T 2 -?lgT 1 ）=0.367×（0.991-
?lgf 1 ）。
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection domain of the present utility model.
Claims (5)
1. the measurement mechanism of a rope friction factor, it is characterized in that, comprise motor (1), wheel box (2), wiring cylinder (5), force cell (4), dynamometry display (3) and standard tension force weight (7), described motor (1), wheel box (2), wiring cylinder (5) connect in turn, described force cell (4) is connected with dynamometry display (3), during measurement, it is upper that rope sample (6) is set around wiring cylinder (5), and rope sample (6) one end connection standard tension force weight (7), the other end connect force cell (4).
2. the measurement mechanism of a kind of rope friction factor according to claim 1, is characterized in that, the material of described wiring cylinder (5) is a kind of in steel, pottery, covered fiber.
3. the measurement mechanism of a kind of rope friction factor according to claim 1, is characterized in that, the range of size of described wiring cylinder (5) diameter is 15-30cm.
4. the measurement mechanism of a kind of rope friction factor according to claim 1, is characterized in that, described standard weight (7) has 0.5kg, 1 kg, 1.5 kg, 2 kg, five kinds of models of 2.5 kg.
5. the measurement mechanism of a kind of rope friction factor according to claim 1, is characterized in that, the winding number of turns for wiring cylinder (5) of described rope sample (6) is 2-5 circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320365418.3U CN203414395U (en) | 2013-06-25 | 2013-06-25 | Device for measuring rope friction coefficients |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320365418.3U CN203414395U (en) | 2013-06-25 | 2013-06-25 | Device for measuring rope friction coefficients |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203414395U true CN203414395U (en) | 2014-01-29 |
Family
ID=49977277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320365418.3U Expired - Lifetime CN203414395U (en) | 2013-06-25 | 2013-06-25 | Device for measuring rope friction coefficients |
Country Status (1)
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| CN (1) | CN203414395U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383342A (en) * | 2013-06-25 | 2013-11-06 | 山东鲁普科技有限公司 | Measuring device for rope friction coefficient and measuring method thereof |
| CN104949834A (en) * | 2015-06-11 | 2015-09-30 | 广州广日电梯工业有限公司 | Traction steel belt test method and traction steel belt test device for simulating elevator running |
| CN106840934A (en) * | 2017-02-20 | 2017-06-13 | 辽宁工程技术大学 | A kind of pit rope fretting wear experimental provision |
-
2013
- 2013-06-25 CN CN201320365418.3U patent/CN203414395U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383342A (en) * | 2013-06-25 | 2013-11-06 | 山东鲁普科技有限公司 | Measuring device for rope friction coefficient and measuring method thereof |
| CN104949834A (en) * | 2015-06-11 | 2015-09-30 | 广州广日电梯工业有限公司 | Traction steel belt test method and traction steel belt test device for simulating elevator running |
| CN104949834B (en) * | 2015-06-11 | 2018-11-20 | 广州广日电梯工业有限公司 | A kind of the traction steel band test method and device of simulating elevator running |
| CN106840934A (en) * | 2017-02-20 | 2017-06-13 | 辽宁工程技术大学 | A kind of pit rope fretting wear experimental provision |
| CN106840934B (en) * | 2017-02-20 | 2019-08-27 | 辽宁工程技术大学 | A kind of pit rope fretting wear experimental provision |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140129 |