CN106482782B - Dynamic radial deformation and dynamic tension monitoring device and the method for the two-fold wire type multi-lay winding steel wire rope of hoist of deep-well - Google Patents

Dynamic radial deformation and dynamic tension monitoring device and the method for the two-fold wire type multi-lay winding steel wire rope of hoist of deep-well Download PDF

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CN106482782B
CN106482782B CN201610850593.XA CN201610850593A CN106482782B CN 106482782 B CN106482782 B CN 106482782B CN 201610850593 A CN201610850593 A CN 201610850593A CN 106482782 B CN106482782 B CN 106482782B
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steel wire
wire rope
sensor
reel
dynamic
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CN106482782A (en
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王大刚
石甘雨
朱真才
史东旭
姜通
彭玉兴
卢昊
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00Measuring or testing not otherwise provided for
    • G01D21/02Measuring two or more variables by means not covered by a single other subclass

Abstract

The invention discloses a kind of deformations of the dynamic radial of the two-fold wire type multi-lay winding steel wire rope of hoist of deep-well and dynamic tension monitoring device, including pedestal, drive system, tension and compression detecting system, dynamic deformation monitoring system;Drive system includes motor, and motor is connected by shaft coupling A, retarder, shaft coupling B with reel, is bonded with brake disc on the outside of reel baffle;Tension and compression detecting system includes servo electric jar, S type pulling force sensors are separately connected servo electric jar and are connect with wire cable clamp, mandrel surface is equipped with friction lining, wirerope-winding is on the dual slope grooving of friction lining surface, it is locked by wire cable clamp wire cable clamp one end, multiple sensor mounting grooves are axially arranged along reel in the friction lining back side, and Weighing type pressure sensor is arranged in sensor mounting groove;Dynamic deformation monitoring system includes two-dimensional laser sensor.The present invention can simulate steel wire rope suffered tensile properties under a variety of working conditions, can accurately detect each layer of steel wire rope deformation quantity and tension.

Description

The dynamic radial deformation of the two-fold wire type multi-lay winding steel wire rope of hoist of deep-well is opened with dynamic Power monitoring device and method
Technical field
The invention patent relates to a kind of radial deformation of the two-fold wire type multi-lay winding steel wire rope of hoist of deep-well and tension Dynamic monitor and method, can simulate in drum winding system steel wire rope acceleration, deceleration, at the uniform velocity, emergency stop etc. it is a variety of It is different to can be used for probing into the real-time radial deformation of every layer of steel wire rope on reel, reel outer wall for suffered tensile properties under working condition The dynamic change of region pressure and steel wire rope tension.
Background technology
The overall process of mining production be unable to do without Mine haul and promotes work, and therefore, transport and the quality for promoting work are straight It connects to be related to and produces and can normally and efficiently carry out in mine.Mine hoist equipment is the throat of mining production, be collect mechanical, electrical, liquid in The large-scale complicated system of one.It is a lifeline of mining production, is mainly used for carrying fortune ore, coal, material, Ren Yuanhe Equipment is the hinge that mine down-hole production system is connected with ground surface plant.As pit mining moves towards deep and modern times Change the requirement of the safe and efficient production of large-scale mine, the application of multi-lay winding formula elevator is increasingly enlarged, with the growth of reel, Weight and rotary inertia increase, and need the motor of bigger, and need the arrangement space of bigger, use multi-lay winding reel can be with Save cost.Dual slope grooving is a kind of grooving form for being suitble to multi-lay winding, it can be efficiently against conventional spool in multilayer The shortcomings that in terms of winding, disorder cable is avoided, effectively extends the service life of steel wire rope.And, hoisting depth big with its hoisting power Greatly, safety coefficient is high, and the remarkable advantages such as low cost are increasingly used in the mine hoisting of deep-well and ultra-deep mine. With the increase of pit mining depth, in order to improve the conevying efficiency of deep-well and ultra-deep mine hoist, hoisting device it is inevitable to Big to promote load and high promotion speed development, this is also that the safety and reliability of lifting means proposes requirements at the higher level, because of steel Cord can deform upon in working long hours, especially operating mode suddenly change when steel wire rope suffered by pulling force and tension easily make steel wire Fracture occurs for rope so as to cause basket of work falling accident, causes casualties.
It is common due to variable boom hoist cable overhang length and inertial load in the lifting process of friction drive hoist Effect, boom hoist cable it is upper carry acceleration, at the uniform velocity, in the lifting process of deceleration a cycle, lifting system can be vibrated, steel Cord is also subjected to dynamic tension variation, and especially in the acceleration of promotion, decelerating phase, the dynamic tension vibration of steel wire rope is larger, vibration Frequency increases with the reduction of rope capacity.Vibration makes pulling force and tension change suffered by steel wire rope, steel wire rope generate radial Deformation influences rope service-life after long time period work, causes the serious accident of elevator.Because each layer of steel wire rope by To power be different and various, if the deformation and tension that can detect each layer of steel wire rope can effectively prevent mine accident Generation.So proposing the dynamic monitor and method of a kind of deep-well boom hoist cable radial deformation and tension, reel is probed into The dynamic change of the real-time radial deformation of upper every layer of steel wire rope, reel outer wall different zones pressure and steel wire rope tension be to It closes important.
Existing steel wire rope of hoist detection device includes:The utility model patent of Patent No. ZL201220715786.1 is public A kind of multirope friction winder steel wire rope tension on-line monitoring device has been opened, wireless transmitter module and pressure sensor can be passed through Acquisition steel wire rope tension is simultaneously wirelessly sent to wireless receiving module, not by the shadow of Structure of hoist and operating status It rings, realizes the real-time monitoring to steel wire rope of hoist dynamic tension, however the radial deformation of each layer of steel wire rope cannot be detected; The utility model patent of Patent No. ZL201420703971.8 discloses a kind of mine hoist tension monitoring system, realizes Mine steel wire rope tension remote real time monitoring, improves the safety of mine hoist, however, the system detectio steel wire rope deformation makes Three-point bending method accuracy is not high, cannot accurately calculate the tension suffered by steel wire rope;Application No. is The patent application of 201510634389.X discloses steel wire rope tension measurement method in a kind of lifting system, is a kind of to measure indirectly Method is not in direct contact steel wire rope, does not destroy steel cord structure, and this method cannot measure the tension of every layer of steel wire rope Value.
Invention content
Goal of the invention:In order to overcome the deficiencies in the prior art, the present invention to provide a kind of two-fold wire type multilayer of deep-well The radial deformation of winding hoisting machine steel wire rope and the dynamic monitor and method of tension, can simulate in drum winding system Steel wire rope acceleration, deceleration, at the uniform velocity, suffered tensile properties under a variety of working conditions such as emergency stop, can be used for probing on reel every layer The real-time radial deformation of steel wire rope, the dynamic change of reel outer wall different zones pressure and steel wire rope tension.
To achieve the goals above, present invention employs the following technical solutions:A kind of two-fold wire type multi-lay winding of deep-well Dynamic radial deformation and the dynamic tension monitoring device of steel wire rope of hoist, including it is pedestal, drive system, tension and compression detecting system, dynamic State DEFORMATION MONITORING SYSTEM;
The pedestal includes motor and reducer stent, servo-electric jar support, two-dimensional laser clamp of sensor and two Laser sensor holder is tieed up, motor and reducer stent and servo-electric jar support are fixed on by ground by foundation bolt On, two-dimensional laser clamp of sensor is fixed on by bolt A on two-dimensional laser sensor stand;
The drive system includes motor, shaft coupling A, retarder, shaft coupling B, and motor and retarder pass through bolt It is fixed on motor and reducer stent, motor output shaft is connected by shaft coupling A with reducer input shaft, and retarder is defeated Shaft is connected by shaft coupling B with the main shaft of reel, the brake disc phase on the outside of the reel baffle of reel ends with disc-brake Fitting;
The tension and compression detecting system includes servo electric jar, S types pulling force sensor, wire cable clamp, steel wire rope, Weighing type Pressure sensor, electric cylinder are bolted in electronic jar, the type pulling force sensor one end S and servo electric jar phase Even, the S type pulling force sensor other ends are connect with wire cable clamp, are equipped with friction lining in mandrel surface, friction lining surface is set There is dual slope grooving, for wirerope-winding on dual slope grooving, wire cable clamp one end passes through the steel wire rope U on wire cable clamp Type lockset is locked, and multiple sensors to match with Weighing type pressure sensor shape are axially arranged along reel for the friction lining back side Mounting groove, Weighing type pressure sensor are arranged in sensor mounting groove;
The dynamic deformation monitoring system includes two-dimensional laser sensor, and the setting of two-dimensional laser sensor alignment is kept off in reel Monitoring holes on plate, brake disc.
Further, the Weighing type pressure sensor includes claiming the heavy formula pressure sensor A close to reel both ends, weighing The formula pressure sensor C and Weighing type pressure sensor B in the middle part of reel.
Further, mandrel surface position corresponding with sensor mounting groove is equipped with planar slot, and Weighing type pressure passes Sensor is fixed by bolt B and planar slot.
It is deformed according to the dynamic radial of the two-fold wire type multi-lay winding steel wire rope of hoist of the deep-well of above-mentioned monitoring device and dynamic Tension monitoring method, this method include the following contents:
A) it drives spool turns by three layers of wirerope-winding to reel by motor, is then shut off motor, steel wire One end restrict by using the tool clamping of steel wire rope U-shape lock, one end phase of wire cable clamp and S type pulling force sensors after wire cable clamp Even, the other end of S type pulling force sensors is connected with servo electric jar;
B) two-dimensional laser sensor is opened, it is ensured that two-dimensional laser sensor can monitor the first of steel wire rope by monitoring holes Layer rope body, second layer rope body, third layer rope body control servo electric jar by disc-brake brake drum by computer It moves horizontally so that the stress of steel wire rope reaches setting fatigue load, records steel wire rope in real time with two-dimensional laser sensor at this time Three layers of external profile of rope, by the change that each layer of steel wire rope is relatively calculated with three layers of external profile of rope of steel wire rope when not reinforcing Shape amount;
C) disc-brake is unclamped, servo electric jar is closed and restarts motor, it is anti-by motor band movable reel 7 One layer is only wound on reel to rotation to steel wire rope, by disc-brake brake drum, and the steel for passing through wire cable clamp Cord U-shape lock has clamping steel wire rope again, and controlling servo electric jar by computer moves horizontally to steel wire rope load, makes two dimension The steel wire rope deflection that laser sensor monitors respectively reaches the deflection of the obtained each layer of steel wire rope of b) step, and leads to Cross the pressure value that Weighing type pressure sensor measures different zones single wire rope respectively;
D) pressure value suffered by each layer of steel wire rope obtained by c) step, is obtained by calculation each layer of steel wire rope Corresponding tension value;
E) the Weighing type pressure sensor for closing servo electric jar, two-dimensional laser sensor and different location, stops experiment;
F) servo electric jar is controlled to steel wire rope with different loads by computer, realize elevator acceleration, at the uniform velocity, Slow down and the operating modes such as emergency stop, passes through the Weighing type pressure sensor of two-dimensional laser sensor, S types pulling force sensor and different location Measured data study the radial deformation of tensile properties of the steel wire rope under various working, tension variation and steel wire rope.
Advantageous effect:Patent of the present invention can simulate in drum winding system steel wire rope in acceleration, deceleration, at the uniform velocity, suddenly The suffered tensile properties under a variety of working conditions such as stop, can accurately detect each layer of steel wire rope deformation quantity and tension, to more smart It is true to judge whether to need replacing steel wire rope, to reduce the accident of mine disaster because caused by being broken steel wire rope of hoist.
Description of the drawings
Fig. 1 is the front view of patent of the present invention;
Fig. 2 is the B direction views of patent of the present invention;
Fig. 3 is the partial enlarged view at I in Fig. 2;
Partial enlarged view at I when Fig. 4 is the tension of detection single layer of wires rope;
Fig. 5 is the A-A partial sectional views of Fig. 2;
Fig. 6 is the partial enlarged view at II in Fig. 5;
Fig. 7 is the partial enlarged view at III in Fig. 5;
Fig. 8 is the partial enlarged view at IV in Fig. 5;
In figure:1, motor and reducer stent;2, motor;3, shaft coupling A;4, retarder;5, shaft coupling B;6, it rolls up Cylinder baffle;7, reel;8, bolt A;9, two-dimensional laser sensor;10, dimension sensor fixture;11, two-dimensional laser sensor branch Frame;12, disc-brake;13, brake disc;14, monitoring holes;15, steel wire rope U-shape lock has;16, wire cable clamp;17, S types are drawn Force snesor;18, servo electric jar;19, servo-electric jar support;20, first layer rope body;21, second layer rope body;22, third Layer rope body;23, Weighing type pressure sensor A;24, steel wire rope;25, friction lining;26, Weighing type pressure sensor B;27, claim Weight formula pressure sensor C;28, planar slot;29, bolt B.
Specific implementation mode:
Further explanation is done to the present invention below in conjunction with the accompanying drawings.
As illustrated in fig. 1 and 2, a kind of dynamic radial of the two-fold wire type multi-lay winding steel wire rope of hoist of deep-well of the invention becomes Shape and dynamic tension monitoring device, including pedestal, drive system, tension and compression detecting system, dynamic deformation monitoring system.
The pedestal includes motor and reducer stent 1, servo-electric jar support 19, two-dimensional laser clamp of sensor 10 And two-dimensional laser sensor stand 11.Motor and reducer stent 1 and servo-electric jar support 19 are consolidated by foundation bolt Determine on the ground, two-dimensional laser clamp of sensor 10 is fixed on by bolt A8 on two-dimensional laser sensor stand 11.
The drive system includes motor 2, shaft coupling A3, retarder 4, shaft coupling B5.Motor 2 and retarder 4 are logical It crosses bolt to be fixed on motor and reducer stent 1,2 output shaft of motor passes through shaft coupling A3 and 4 input shaft phase of retarder Even, 4 output shaft of retarder is connected by shaft coupling B5 with the main shaft of reel 7,6 outside of reel baffle of 7 end of reel and dish type The brake disc 13 of brake 12 fits.
The tension and compression detecting system includes servo electric jar 18, S types pulling force sensor 17, wire cable clamp 16, steel wire rope 24, Weighing type pressure sensor.Electric cylinder 18 is bolted in electronic jar 19,17 one end of S types pulling force sensor It is connected with servo electric jar 18,17 other end of S types pulling force sensor is connect with wire cable clamp 16, is equipped with and is rubbed on 7 surface of reel Liner 25 is wiped, 25 surface of friction lining is equipped with dual slope grooving, and steel wire rope 24 is wrapped on dual slope grooving, wire cable clamp 16 One end passes through 15 locking of steel wire rope U-shape lock tool on wire cable clamp 16.
As shown in Fig. 5 to 8, multiple and Weighing type pressure sensor shape is axially arranged along reel 7 in 25 back side of friction lining The sensor mounting groove to match, Weighing type pressure sensor are arranged in sensor mounting groove, 7 surface of the reel and sensing The corresponding position of device mounting groove is equipped with planar slot 28, and Weighing type pressure sensor is fixed by bolt B 29 and planar slot 28.This reality It applies in example, the Weighing type pressure sensor includes claiming the heavy formula pressure sensor A23 close to 7 both ends of reel, Weighing type pressure The sensor C27 and Weighing type pressure sensor B26 in the middle part of reel 7.
The dynamic deformation monitoring system includes two-dimensional laser sensor 9, and the alignment of two-dimensional laser sensor 9 is arranged in reel Monitoring holes 14 on baffle 6, brake disc 13.
It is deformed according to the dynamic radial of the two-fold wire type multi-lay winding steel wire rope of hoist of the deep-well of above-mentioned monitoring device and dynamic Tension monitoring method, this method include the following contents:
A) it is rotated with movable reel 7 by motor 2 and steel wire rope 24 is wound three layers to reel 7, be then shut off motor 2, by using steel wire rope U-shape lock tool 15 to clamp after wire cable clamp 16, wire cable clamp 16 passes 24 one end of steel wire rope with S type pulling force One end of sensor 17 is connected, and the other end of S types pulling force sensor 17 is connected with servo electric jar 18;
B) as shown in figure 3, opening two-dimensional laser sensor 9, it is ensured that two-dimensional laser sensor 9 can be monitored by monitoring holes 14 To the first layer rope body 20, second layer rope body 21, third layer rope body 22 of steel wire rope 24, by 12 brake drum 7 of disc-brake, Servo electric jar 18 is controlled by computer to move horizontally so that the stress of steel wire rope 24 reaches setting fatigue load, at this time with two Dimension laser sensor 9 records the external profiles of 24 3 layers of steel wire rope rope in real time, by with 24 3 layers of rope body of steel wire rope when not reinforcing The deflection of each layer of steel wire rope 24 is relatively calculated in outer profile;
C) it as shown in figure 4, unclamping disc-brake 12, closes servo electric jar 18 and restarts motor 2, pass through electricity Motivation 2 is reversely rotated to 24 one layer of windings of steel wire rope with movable reel 7 on reel 7, passes through 12 brake drum of disc-brake 7, and by the steel wire rope U-shape lock of wire cable clamp 16 tool 15 again clamping steel wire rope 24, servo-electric is controlled by computer Cylinder 18, which moves horizontally, loads steel wire rope 24, and the steel wire rope deflection that two-dimensional laser sensor 9 monitors is made to respectively reach b) step The deflection of rapid obtained each layer of steel wire rope 24, and different zones single 24 are measured by Weighing type pressure sensor respectively The pressure value of steel wire rope;
D) pressure value suffered by each layer of steel wire rope 24 obtained by c) step, is obtained by calculation every layer of steel wire It restricts 24 corresponding tension values;In the step, empirical equation is calculated by steel wire rope tension and converts pressure value to tension value;
E) the Weighing type pressure sensor for closing servo electric jar 18, two-dimensional laser sensor 9 and different location, stops examination It tests;
F) servo electric jar 18 is controlled to steel wire rope 24 with different loads by computer, realize elevator acceleration, At the uniform velocity, the operating modes such as deceleration and emergency stop, pass through the Weighing type pressure of two-dimensional laser sensor 9, S types pulling force sensor 17 and different location Data measured by force snesor study tensile properties, the radial direction of tension variation and steel wire rope of the steel wire rope under various working Deformation.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (4)

1. dynamic radial deformation and the dynamic tension monitoring device of a kind of two-fold wire type multi-lay winding steel wire rope of hoist of deep-well, special Sign is:Including pedestal, drive system, tension and compression detecting system, dynamic deformation monitoring system;
The pedestal includes motor and reducer stent (1), servo-electric jar support (19), two-dimensional laser clamp of sensor (10) and two-dimensional laser sensor stand (11), by foundation bolt by motor and reducer stent (1) and servo electric jar Holder (19) fixes on the ground, and two-dimensional laser clamp of sensor (10) is fixed on two-dimensional laser sensor branch by bolt A (8) On frame (11);
The drive system includes motor (2), shaft coupling A (3), retarder (4), shaft coupling B (5), motor (2) and is slowed down Device (4) is bolted on motor and reducer stent (1), motor (2) output shaft by shaft coupling A (3) with subtract Fast device (4) input shaft is connected, and retarder (4) output shaft is connected by shaft coupling B (5) with the main shaft of reel (7), reel (7) end It fits with the brake disc (13) of disc-brake (12) on the outside of the reel baffle (6) in portion;
The tension and compression detecting system includes servo electric jar (18), S types pulling force sensor (17), wire cable clamp (16), steel wire Rope (24), Weighing type pressure sensor, electric cylinder (18) are bolted in electronic jar (19), S type pull sensing Device (17) one end is connected with servo electric jar (18), and S types pulling force sensor (17) other end is connect with wire cable clamp (16), Reel (7) surface is equipped with friction lining (25), and friction lining (25) surface is equipped with dual slope grooving, and steel wire rope (24) is wrapped in double On fold line grooves, wire cable clamp (16) one end is locked by the steel wire rope U-shape lock tool (15) on wire cable clamp (16), friction Multiple sensor mounting grooves to match with Weighing type pressure sensor shape are axially arranged along reel (7) for liner (25) back side, Weighing type pressure sensor is arranged in sensor mounting groove;
The dynamic deformation monitoring system includes two-dimensional laser sensor (9), and two-dimensional laser sensor (9) alignment is arranged in reel Monitoring holes (14) on baffle (6), brake disc (13).
2. the two-fold wire type multi-lay winding steel wire rope of hoist of a kind of deep-well according to claim 1 dynamic radial deformation with Dynamic tension monitoring device, it is characterised in that:The Weighing type pressure sensor includes the heavy formula pressure claimed close to reel (7) both ends Sensors A (23), Weighing type pressure sensor C (27) and the Weighing type pressure sensor B (26) in the middle part of reel (7).
3. the two-fold wire type multi-lay winding steel wire rope of hoist of a kind of deep-well according to claim 2 dynamic radial deformation with Dynamic tension monitoring device, it is characterised in that:Reel (7) surface position corresponding with sensor mounting groove is equipped with planar slot (28), Weighing type pressure sensor is fixed by bolt B (29) and planar slot (28).
4. being deformed and dynamic according to the dynamic radial of the two-fold wire type multi-lay winding steel wire rope of hoist of the deep-well of above-mentioned monitoring device Force monitoring methods, which is characterized in that this method includes the following contents:
A) it is rotated by motor (2) band movable reel (7) and steel wire rope (24) is wound three layers to reel (7), be then shut off electricity Motivation (2), steel wire rope (24) one end use steel wire rope U-shape lock tool (15) to clamp afterwards by wire cable clamp (16), wire cable clamp (16) it is connected with one end of S types pulling force sensor (17), the other end and servo electric jar (18) phase of S types pulling force sensor (17) Even;
B) two-dimensional laser sensor (9) is opened, it is ensured that two-dimensional laser sensor (9) can monitor steel wire rope by monitoring holes (14) (24) first layer rope body (20), second layer rope body (21), third layer rope body (22), pass through disc-brake (12) brake drum (7), servo electric jar (18) is controlled by computer to move horizontally so that the stress of steel wire rope (24) reaches setting fatigue load, Record the external profiles of (24) three layers of steel wire rope rope in real time with two-dimensional laser sensor (9) at this time, by with steel wire when not reinforcing The deflection of each layer of steel wire rope (24) is relatively calculated in (24) three layers of external profile of rope of rope;
C) disc-brake (12) is unclamped, servo electric jar (18) is closed and restarts motor (2), is passed through motor (2) Band movable reel (7), which is reversely rotated to steel wire rope (24), only winds one layer on reel (7), is braked and is rolled up by disc-brake (12) Cylinder (7), and by the steel wire rope U-shape lock of wire cable clamp (16) tool (15) again clamping steel wire rope (24), pass through computer control Servo electric jar (18) processed, which moves horizontally, loads steel wire rope (24), and the steel wire rope that two-dimensional laser sensor (9) monitors is made to become Shape amount respectively reaches the deflection of the obtained each layer of steel wire rope (24) of b) step, and is distinguished by Weighing type pressure sensor Measure the pressure value of different zones single wire rope (24);
D) pressure value suffered by each layer of steel wire rope (24) obtained by c) step, is obtained by calculation each layer of steel wire rope (24) corresponding tension value;
E) the Weighing type pressure sensor for closing servo electric jar (18), two-dimensional laser sensor (9) and different location, stops examination It tests;
F) servo electric jar (18) is controlled to steel wire rope (24) with different loads by computer, realize elevator acceleration, At the uniform velocity, deceleration and emergency stop operating mode, pass through two-dimensional laser sensor (9), the Weighing type of S types pulling force sensor (17) and different location Data measured by pressure sensor study the diameter of tensile properties of the steel wire rope under various working, tension variation and steel wire rope To deformation.
CN201610850593.XA 2016-09-26 2016-09-26 Dynamic radial deformation and dynamic tension monitoring device and the method for the two-fold wire type multi-lay winding steel wire rope of hoist of deep-well Active CN106482782B (en)

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PCT/CN2016/108883 WO2018053944A1 (en) 2016-09-26 2016-12-07 Device and method for monitoring dynamic radial deformation and dynamic tension of steel rope of deep-well double-broken-line multilayer winding hoist
AU2016401400A AU2016401400B2 (en) 2016-09-26 2016-12-07 A monitoring device and method for dynamic radial deformation and dynamic tension of wire ropes on double broken line multi-layer winding hoists for deep mines

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