CN112666007A - Steel wire rope bending fatigue testing device and testing method - Google Patents
Steel wire rope bending fatigue testing device and testing method Download PDFInfo
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- CN112666007A CN112666007A CN202110108377.9A CN202110108377A CN112666007A CN 112666007 A CN112666007 A CN 112666007A CN 202110108377 A CN202110108377 A CN 202110108377A CN 112666007 A CN112666007 A CN 112666007A
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Abstract
A steel wire rope bending fatigue testing device and a testing method comprise a working host and a PLC (programmable logic controller) control cabinet, wherein the working host comprises a base, a rack, a testing wheel, a driving wheel, a guide wheel, a loading wheel, a motor, a speed reducer, a crank-link mechanism and a loading oil cylinder, the power output end of the crank-link mechanism drives the driving wheel to rotate in a reciprocating mode, the testing wheel, the driving wheel, the loading wheel and the guide wheel are located on the same plane, and the PLC control cabinet controls a hydraulic oil source to drive the loading oil cylinder to lift up so as to drive the loading wheel to tension a steel wire rope sample according to. The device and the test method adopt the loading oil cylinder to provide constant large-tonnage tension for the steel wire rope sample, solve the problem that the tension is too low to meet the test requirement, realize the requirement of the bending fatigue test of the steel wire ropes with different diameters and large specifications by the aid of the test wheel and guide rail structures which can be conveniently replaced, and effectively improve the test efficiency of the device.
Description
Technical Field
The invention relates to the field of machinery, in particular to a steel wire rope performance testing technology, and specifically relates to a device and a method for testing bending fatigue of a large-size steel wire rope.
Background
The large-size steel wire rope is a spiral rope manufactured through multiple processes of wire drawing, stranding, rope combining and the like. The tension bearing device is mainly used for bearing tension in use and is widely applied to production and life such as hoisting, elevators, ships, bridge construction and the like. In the use process of the large-size steel wire rope, the large-size steel wire rope is mostly matched with the pulley for use, so that the purposes of changing the direction, increasing the force, increasing the speed or reducing the speed and the like are realized. When the steel wire rope is matched with a pulley for use, the steel wire rope can be bent to and fro, and the bending fatigue test needs to be carried out on phenomena of wire breakage, twisting breakage and the like which can occur when the steel wire rope is used, so that the service life of the steel wire rope in a bending fatigue state is verified, and the safety in use is ensured. In the prior art, a steel wire rope bending fatigue testing machine is generally used for a steel wire rope with the diameter being less than 20mm, a lever structure is adopted to provide tension, the tension is difficult to exceed 10 tons, and the tension required by a large-specification steel wire rope bending fatigue test cannot be effectively achieved.
Disclosure of Invention
The invention aims to provide a steel wire rope bending fatigue testing device and a steel wire rope bending fatigue testing method. The test wheel and the guide rail structure which can be conveniently replaced meet the requirement of bending fatigue tests of steel wire ropes with different diameters and large specifications, the problems that the test wheel cannot be moved by manpower and hoisting equipment cannot be used when the position is replaced are solved, and the test efficiency of the device is effectively improved.
The invention discloses a steel wire rope bending fatigue testing device, which comprises a working host and a PLC (programmable logic controller) control cabinet, wherein the working host is electrically connected with the PLC control cabinet, the working host comprises a base, a frame, a test wheel, a driving wheel, a guide wheel, a loading wheel, a motor, a speed reducer, a crank-link mechanism and a loading oil cylinder, the frame is fixedly connected on the base, the motor and the speed reducer are horizontally and fixedly connected with the base through a bracket, an output shaft of the motor is connected with an input shaft of the speed reducer, an output shaft of the speed reducer is connected with a power input end of the crank-link mechanism through a crank, a power output end of the crank-link mechanism is fixedly connected with a wheel shaft of the driving wheel through a rocker to drive the driving wheel to rotate in a reciprocating manner, the test wheel, the driving wheel, the loading wheel and the guide wheel are positioned on the same plane, the test wheel rotates and installs on test wheel seat, test wheel seat passes through the removable fixed connection of screw in the frame, the test wheel with the action wheel set up in the both sides of base, the loading wheel is located directly over the test wheel, the leading wheel set up in action wheel upper left side 45 degrees angular position department, and be located loading wheel lower right side 45 degrees angular position department, loading cylinder is located loading wheel below fixed connection in the frame, loading cylinder's piston rod top with loading wheel seat fixed connection, the drive of PLC switch board control hydraulic oil source loading cylinder jacking drives the loading wheel is according to predetermined loading power with the tensioning of wire rope sample, be equipped with the both ends that fixed cassette is used for fixed wire rope sample on the action wheel.
Further, a guide rail is installed below the test wheel, four supporting pulleys are arranged at the bottom of the test wheel seat, and the four supporting pulleys are connected with the guide rail in a sliding fit mode.
Further, the wheel diameter of the test wheel is 16 times of the diameter of the steel wire rope sample.
Furthermore, the PLC control cabinet adopts a touch screen type PLC programmable control system.
The invention also provides a steel wire rope bending fatigue testing method, which is characterized by comprising the following steps: the method comprises the following steps: the method comprises the following steps: mounting a test wheel with the wheel diameter matched with the specification of the steel wire rope sample to be tested on a rack of the working host through a guide rail; step two: sequentially winding a steel wire rope sample to be tested on a driving wheel, a guide wheel, a loading wheel and a test wheel, wherein two ends of the steel wire rope sample are fixed on the driving wheel through fixing clamping seats to form an annular structure; step three: operating the PLC control cabinet and setting a loading force, controlling the loading oil cylinder to drive the loading wheel to apply the loading force, and keeping the set load unchanged after the preset test loading force is reached; step four: the starting motor and the speed reducer output power, and the driving wheel is driven to swing back and forth through the crank connecting rod mechanism; step five: a control system of the PLC control cabinet records the state of a motor and the number of times of reciprocating rotation, determines a bending section to be detected in a steel wire rope sample to be detected as an observation section of a bending fatigue test, and observes and records the change of the reduction rate of the rope diameter and the number of visible broken wires in the observation section at set time intervals; step six: when the diameter reduction rate or the number of visible broken wires of the observation section exceeds a specified standard, acquiring the number of times of the reciprocating rotation of the motor, namely the bending fatigue life of the test steel wire rope sample; step seven: and when the conditions of judging the test termination, such as set times or broken wires, are reached, the test is terminated, the motor is stopped, and the loading oil cylinder is reset.
The working principle of the invention is as follows: after the steel wire rope sample is installed, the loading oil cylinder tensions the steel wire rope according to a preset loading force and continuously keeps a set load, the motor and the speed reducer output power to drive the crank link mechanism to push the driving wheel to rotate in a reciprocating mode, the steel wire rope sample drives the guide wheel, the loading wheel and the test wheel to rotate together, reciprocating motion of the steel wire rope sample on the test wheel is achieved, the PLC records the number of times of reciprocating rotation of the motor, when the diameter reduction rate or the number of visible broken wires of the steel wire rope observation section exceeds a specified standard or reaches a set test number, the number of times of reciprocating rotation of the motor recorded by the PLC records the number of times of reciprocating rotation of the motor, the bending fatigue life of the tested steel wire rope sample.
Compared with the prior art, the invention has positive and obvious effect. The loading oil cylinder is adopted to provide constant large-tonnage tension (16kN-800kN) for the steel wire rope sample, and the problem that the tension is too low to meet the test requirement in the bending fatigue test of the large-size steel wire rope is solved. The test wheel and the guide rail structure which can be conveniently replaced meet the requirement of bending fatigue tests of steel wire ropes with different diameters and large specifications, the problems that the test wheel cannot be moved by manpower and hoisting equipment cannot be used when the position is replaced are solved, and the test efficiency of the device is effectively improved.
Drawings
Fig. 1 is a schematic perspective view of the device of the present invention.
Fig. 2 is a schematic front view of the apparatus of the present invention.
Fig. 3 is a schematic structural view of a crank link mechanism of the device of the invention.
FIG. 4 is a schematic view of the test wheel structure of the device of the present invention.
Detailed Description
Example 1:
as shown in fig. 1 to 4, the steel wire rope bending fatigue testing device of the invention comprises a working host 1 and a PLC control cabinet 2, wherein the working host 1 is electrically connected with the PLC control cabinet 2, the working host 1 comprises a base 101, a frame 102, a test wheel 103, a driving wheel 104, a guide wheel 105, a loading wheel 106, a motor 107, a speed reducer 108, a crank link mechanism 109 and a loading oil cylinder 1010, the frame 102 is fixedly connected to the base 101, the motor 107 and the speed reducer 108 are horizontally and fixedly connected with the base 101 through a bracket 102, an output shaft of the motor 107 is connected with an input shaft of the speed reducer 108, an output shaft of the speed reducer 108 is connected with a power input end of the crank link mechanism 109 through a crank 1011, a power output end of the crank link mechanism 109 is fixedly connected with an axle of the driving wheel 104 through a rocker 1012 to drive the driving wheel 104 to reciprocate, the test wheel 103, the driving wheel, the driving wheel 104 and the guide wheel 105 are respectively installed on a rack through wheel seats, the test wheel 103 is rotatably installed on a test wheel seat 1013, the test wheel seat 1013 is fixedly connected on the rack 102 through a replaceable screw, the test wheel 103 and the driving wheel 104 are arranged on two sides of the base 101, the loading wheel 106 is positioned right above the test wheel 103, the guide wheel 105 is arranged at a 45-degree position on the upper left of the driving wheel 104 and at a 45-degree position on the lower right of the loading wheel 106, the loading oil cylinder 1010 is positioned below the loading wheel 106 and fixedly connected on the rack 102, the top of a piston rod of the loading oil cylinder 1010 is fixedly connected with the wheel seat of the loading wheel 106, the PLC control cabinet 2 controls the hydraulic oil source 1014 to drive the loading oil cylinder 1010 to lift up, the loading wheel 106 is driven to tension a steel wire rope sample 1014 according to a preset loading force, and.
Further, guide rail 1016 is installed to experimental wheel 103 below, and the bottom of experimental wheel seat 1013 is equipped with four supporting pulley 1017, and four supporting pulley 1017 are connected with guide rail 1016 sliding fit, because experimental wheel subassembly weight is about 1 ton, and the manpower can't be moved, and hoisting equipment is also inconvenient to use in the change position, through set up supporting pulley 1017 and guide rail 1016 structure on experimental wheel seat 1013, realizes the convenient change of experimental wheel subassembly. Firstly, the test wheel assembly is placed on the guide rail 1016 by the hoisting equipment, the four supporting pulleys 1017 on the test wheel assembly are in contact with the guide rail 1016, the test wheel assembly can be pushed to the installation position by manpower, and then the test wheel assembly is fastened with a support of the working main machine by screws. When the test wheel assembly is detached, the screw is detached firstly, the test wheel assembly automatically falls onto the guide rail 1016, the test wheel assembly is pushed out manually, and then the test wheel assembly is transported to a proper position by the hoisting equipment.
Further, the wheel diameter of the test wheel 103 is 16 times of the 1014 diameter of the steel wire rope sample, the 1014 specification of the steel wire rope sample is in the range of phi 20 mm-phi 50mm, when the 1014 steel wire rope samples with different specifications are replaced, different test wheels 103 need to be replaced, the wheel diameter of the test wheel 103 is guaranteed to be 16 times of the 1014 diameter of the steel wire rope sample, and meanwhile, the wheel groove of the test wheel 103 needs to be adjusted according to the specification of the sample.
Furthermore, the PLC control cabinet 2 adopts a touch screen type PLC programmable control system.
The invention also provides a steel wire rope bending fatigue testing method, which comprises the following steps:
the method comprises the following steps: mounting a test wheel with the wheel diameter matched with the specification of the steel wire rope sample to be tested on a frame of a working host through a guide rail;
step two: sequentially winding a steel wire rope sample to be tested on a driving wheel, a guide wheel, a loading wheel and a test wheel, wherein two ends of the steel wire rope sample are fixed on the driving wheel through fixing clamping seats to form an annular structure;
step three: operating the PLC control cabinet and setting a loading force, controlling the loading oil cylinder to drive the loading wheel to apply the loading force, and keeping the set load unchanged after the preset test loading force is reached;
step four: the starting motor and the speed reducer output power, and the driving wheel is driven to swing back and forth through the crank connecting rod mechanism;
step five: a control system of the PLC control cabinet records the state of a motor and the number of times of reciprocating rotation, determines a bending section to be detected in a steel wire rope sample to be detected as an observation section of a bending fatigue test, and observes and records the change of the reduction rate of the rope diameter and the number of visible broken wires in the observation section at set time intervals;
step six: when the diameter reduction rate or the number of visible broken wires of the observation section exceeds a specified standard, acquiring the number of times of the reciprocating rotation of the motor, namely the bending fatigue life of the test steel wire rope sample;
step seven: and when the conditions of judging the test termination, such as set times or broken wires, are reached, the test is terminated, the motor is stopped, and the loading oil cylinder is reset.
Claims (5)
1. The utility model provides a wire rope bending fatigue testing arrangement which characterized in that: the device comprises a working host and a PLC control cabinet, wherein the working host is electrically connected with the PLC control cabinet, the working host comprises a base, a rack, a test wheel, a driving wheel, a guide wheel, a loading wheel, a motor, a speed reducer, a crank connecting rod mechanism and a loading oil cylinder, the rack is fixedly connected on the base, the motor and the speed reducer are horizontally and fixedly connected with the base through a support, an output shaft of the motor is connected with an input shaft of the speed reducer, an output shaft of the speed reducer is connected with a power input end of the crank connecting rod mechanism through a crank, a power output end of the crank connecting rod mechanism is fixedly connected with a wheel shaft of the driving wheel through a rocker to drive the driving wheel to rotate in a reciprocating manner, the test wheel, the driving wheel, the loading wheel and the guide wheel are positioned on the same plane, and the driving wheel, the test wheel rotates and installs on test wheel seat, test wheel seat passes through the removable fixed connection of screw in the frame, the test wheel with the action wheel set up in the both sides of base, the loading wheel is located directly over the test wheel, the leading wheel set up in action wheel upper left side 45 degrees angular position department, and be located loading wheel lower right side 45 degrees angular position department, loading cylinder is located loading wheel below fixed connection in the frame, loading cylinder's piston rod top with loading wheel seat fixed connection, the drive of PLC switch board control hydraulic oil source loading cylinder jacking drives the loading wheel is according to predetermined loading power with the tensioning of wire rope sample, be equipped with the both ends that fixed cassette is used for fixed wire rope sample on the action wheel.
2. The steel wire rope bending fatigue testing device according to claim 1, characterized in that: the guide rail is installed to the test wheel below, the bottom of test wheel seat is equipped with four supporting pulley, four supporting pulley with guide rail sliding fit connects.
3. The steel wire rope bending fatigue testing device according to claim 1, characterized in that: the wheel diameter of the test wheel is 16 times of the diameter of the steel wire rope sample.
4. The steel wire rope bending fatigue testing device according to claim 1, characterized in that: the PLC control cabinet adopts a touch screen type PLC programmable control system.
5. A steel wire rope bending fatigue testing method implemented by using the steel wire rope bending fatigue testing device according to claim 1, characterized in that: the method comprises the following steps:
the method comprises the following steps: mounting a test wheel with the wheel diameter matched with the specification of the steel wire rope sample to be tested on a rack of the working host through a guide rail;
step two: sequentially winding a steel wire rope sample to be tested on a driving wheel, a guide wheel, a loading wheel and a test wheel, wherein two ends of the steel wire rope sample are fixed on the driving wheel through fixing clamping seats to form an annular structure;
step three: operating the PLC control cabinet and setting a loading force, controlling the loading oil cylinder to drive the loading wheel to apply the loading force, and keeping the set load unchanged after the preset test loading force is reached;
step four: the starting motor and the speed reducer output power, and the driving wheel is driven to swing back and forth through the crank connecting rod mechanism;
step five: a control system of the PLC control cabinet records the state of a motor and the number of times of reciprocating rotation, determines a bending section to be detected in a steel wire rope sample to be detected as an observation section of a bending fatigue test, and observes and records the change of the reduction rate of the rope diameter and the number of visible broken wires in the observation section at set time intervals;
step six: when the diameter reduction rate or the number of visible broken wires of the observation section exceeds a specified standard, acquiring the number of times of the reciprocating rotation of the motor, namely the bending fatigue life of the test steel wire rope sample;
step seven: and when the conditions of judging the test termination, such as set times or broken wires, are reached, the test is terminated, the motor is stopped, and the loading oil cylinder is reset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110108377.9A CN112666007A (en) | 2021-01-27 | 2021-01-27 | Steel wire rope bending fatigue testing device and testing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110108377.9A CN112666007A (en) | 2021-01-27 | 2021-01-27 | Steel wire rope bending fatigue testing device and testing method |
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| CN112666007A true CN112666007A (en) | 2021-04-16 |
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| CN202110108377.9A Pending CN112666007A (en) | 2021-01-27 | 2021-01-27 | Steel wire rope bending fatigue testing device and testing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740248A (en) * | 2021-09-15 | 2021-12-03 | 江苏美霖铜业有限公司 | Experimental device for friction loss between high-strength high-speed rail contact wire and pantograph |
| CN113804564A (en) * | 2021-08-23 | 2021-12-17 | 中山大学 | Method for analyzing cumulative plastic deformation of ultra-duplex stainless steel pipe of umbilical cable |
| CN114062159A (en) * | 2021-11-18 | 2022-02-18 | 江苏中利集团股份有限公司 | Cable bending test device and test method |
| CN114755115A (en) * | 2022-02-11 | 2022-07-15 | 广东新稳建筑检测鉴定有限公司 | Method and system for detecting bending fatigue damage of reinforced concrete beam |
-
2021
- 2021-01-27 CN CN202110108377.9A patent/CN112666007A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113804564A (en) * | 2021-08-23 | 2021-12-17 | 中山大学 | Method for analyzing cumulative plastic deformation of ultra-duplex stainless steel pipe of umbilical cable |
| CN113740248A (en) * | 2021-09-15 | 2021-12-03 | 江苏美霖铜业有限公司 | Experimental device for friction loss between high-strength high-speed rail contact wire and pantograph |
| CN114062159A (en) * | 2021-11-18 | 2022-02-18 | 江苏中利集团股份有限公司 | Cable bending test device and test method |
| CN114755115A (en) * | 2022-02-11 | 2022-07-15 | 广东新稳建筑检测鉴定有限公司 | Method and system for detecting bending fatigue damage of reinforced concrete beam |
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