WO2020073580A1

WO2020073580A1 - Device and method for testing load-carrying properties of wire rope for friction hoist

Info

Publication number: WO2020073580A1
Application number: PCT/CN2019/075868
Authority: WO
Inventors: 牛强; 王重秋; 夏士雄; 陈朋朋
Original assignee: 中国矿业大学
Priority date: 2018-10-10
Filing date: 2019-02-22
Publication date: 2020-04-16
Also published as: CN108956309B; CA3115559A1; CA3115559C; CN108956309A

Abstract

A device and method for testing load-carrying properties of a wire rope for a friction hoist. The testing device comprises two loaded hydraulic cylinders (1), a hydraulic cylinder locating platform (2), a wire rope locating platform (6), a surrounding angle locating device (4) provided on a linear segment of the wire rope locating platform (6) in the vertical direction, and a plurality of wire rope locating devices (5) provided on an arc segment of the wire rope locating platform (6) in the radial direction. A practical friction hoisting process is simulated on the basis of the principle of driving a wire rope (3) and a two-way hydraulic pump (5-b) by the double-acting hydraulic cylinders (1) to provide load damping, the working conditions such as overload and secondary overload can be simulated for the loading of the hydraulic cylinders (1), and a creeping process of the wire rope (3) in a surrounding arc can be simulated for the providing of the load damping by the hydraulic pump (5-b), so that the load-carrying properties of the wire rope (3) can be accurately tested, and the test requirements of friction hoists having different drum diameters and different surrounding angles can be met.

Description

Device and method for testing bearing performance of steel wire rope of friction hoist

Technical field

The invention relates to a device and method for testing the bearing performance of a steel wire rope, in particular to a device and method for testing the bearing performance of a steel wire rope suitable for a friction hoist

Background technique

The vertical shaft hoist as the main mine hoisting equipment is responsible for the important tasks of lifting coal gangue, lowering materials, lifting personnel and equipment, and is the connection hub between the underground coal mine and the ground, in which the friction hoist occupies a dominant position. As a key component for carrying and transmitting power, the wire rope is directly related to the safety of mine lifting. According to the "Coal Mine Safety Regulations", the scrapping and replacement of wire ropes is generally 2 years, and when the number of broken wires suddenly increases or the elongation suddenly accelerates, they must be replaced immediately. Before installing a new rope, it should be avoided that the new rope reduces the load-bearing performance of the hoist, causing major safety hazards. In addition, the shaft hoist is a key long-term coal mine equipment, and the rope replacement needs to interrupt coal lifting transportation. If the rope needs to be repaired after the rope is replaced, it will cause significant economic losses. Therefore, before replacing a new rope, it is necessary to conduct strict load-bearing test on the steel rope.

At present, there are many manufacturers of steel wire ropes for mining, and the manufacturing processes and production standards used are not the same, and the load-bearing performance test of steel wire ropes lacks a unified device and standard. Due to the diverse geological conditions of coal mines, different demands are placed on lifting loads and lifting speeds, resulting in vertical shaft friction hoists with different drum diameters and different enveloping angles, which makes it difficult to adopt a unified device for performance testing of steel wire ropes. The construction of test devices for friction hoists of different specifications will result in higher construction and operating costs and will not meet economic needs. This makes it difficult for enterprises to accurately assess the load-bearing performance of the steel wire rope before leaving the factory. At present, the factory inspection of steel wire ropes mainly adopts the linear tension and torsion test of the steel wire rope, or the tensile, torsion and torsion test of the steel wire, and ignores the key factors that affect the fatigue life of the steel wire rope, such as the winding radius and the wrap angle of the steel wire rope. , And does not accurately reflect the carrying capacity of the wire rope.

At present, the research on the detection of steel wire ropes mainly focuses on the detection of mines in active service. For example, the new steel wire rope non-destructive testing device with application number CN201710462492.X adopts the method of magnetic flux leakage to detect steel wire rope defects. At the same time, some scholars set up various test stands to test the single performance of the steel wire rope. For example, the steel wire rope high-speed and fretting friction test device with the authorization number CN201410728384.9 can simulate the friction behavior between the steel wire ropes and analyze different sliding speeds and fretting The friction state of the wire rope under friction conditions. However, the above research cannot perform uniform tests on vertical shaft friction hoists of different specifications. Therefore, it is necessary to study a test device that can carry out a unified test on the load-bearing performance of vertical shaft friction lifting steel ropes with different drum diameters and drum wrap angles, so as to uniformly check the different types of steel ropes produced by various manufacturers before installation on site. Avoiding repeated testing investment by large-scale production enterprises, improving the manufacturing quality of small-scale production enterprises, standardizing and improving the wire rope market, and ensuring the improvement of the load-bearing performance of the wire rope are of great significance for ensuring the safety of vertical shafts, and there is currently no corresponding test equipment.

Summary of the invention

Technical problem: The purpose of the present invention is to overcome the shortcomings in the prior art, and to provide a friction hoist steel rope load-bearing performance testing device and method with a simple structure and both reliability and practicality.

Technical solution: In order to achieve the above object, the friction hoist steel wire bearing performance testing device of the present invention includes a loading hydraulic cylinder connected to the tested steel wire rope, a hydraulic cylinder positioning platform, a wrap angle positioning device, several steel wire rope positioning devices and a steel wire rope positioning platform The hydraulic cylinder positioning platform is arranged in a vertical direction, and a plurality of rows of hydraulic cylinder positioning holes are arranged in parallel on the above. The steel wire positioning platform is in an arc shape and is located on the same plane and opposite to the hydraulic cylinder positioning platform. The steel wire rope positioning platform is provided with a number of rows of positioning holes arranged in a circle. There are two loading hydraulic cylinders. The hydraulic cylinder positioning holes are arranged side by side on the hydraulic cylinder positioning platform in the horizontal direction; the surrounding angle positioning device passes The positioning holes are arranged on the straight section of the wire rope positioning platform in the vertical direction; several wire rope positioning devices are arranged on the arc section of the wire rope positioning platform in the radial direction through the positioning holes.

The surrounding angle positioning device includes positioning telescopic rod sleeve, surrounding angle positioning slide table, surrounding angle positioning screw, surrounding angle positioning screw nut, positioning telescopic rod, surrounding angle positioning roller, and surrounding angle Positioning friction pad, surrounding angle positioning support platform, surrounding angle positioning support and surrounding angle positioning handwheel; the surrounding angle positioning support platform is provided on the surrounding angle positioning support, and the surrounding angle is positioned The lead screw, the wrap angle positioning screw nut and the wrap angle positioning handwheel are coaxially arranged, and the rotation of the wrap angle positioning handwheel drives the wrap angle positioning screw to rotate, thereby pushing the wrap angle positioning screw nut Move back and forth; the wrap angle positioning slide table is fixed to the wrap angle positioning screw nut, which can slide on the upper surface of the wrap angle positioning support table in the axial direction, and the positioning telescopic rod sleeve is arranged in the wrap around the axis On the angular positioning slide table, the top of the positioning telescopic rod is provided with a wrap angle positioning roller, and the rim of the wrap angle positioning roller is provided with a groove, and the wrap angle positioning friction pad is installed in the groove. The surrounding pad angle positioning friction pad is provided with a rope groove.

The wire rope positioning device includes a wire rope positioning support platform, a bidirectional hydraulic pump, a wire rope positioning screw, a wire rope positioning support, a hydraulic pump positioning bolt, a hydraulic pump spindle, a wire rope positioning main roller, a wire rope positioning main slide table, a wire rope positioning friction lining Pad, wire rope clamping bolt, wire rope positioning auxiliary roller, wire rope positioning auxiliary sliding table, wire rope positioning screw nut, wire rope clamping nut and wire rope positioning hand wheel; the wire rope positioning support platform is provided on the wire rope positioning support, the The wire rope positioning screw, the wire rope positioning screw nut and the wire rope positioning hand wheel are coaxially arranged, and the rotation of the wire rope positioning hand wheel drives the rotation of the wire rope positioning screw, thereby pushing the wire rope positioning screw nut forward and backward; the wire rope positioning main slide It is fixed on the wire rope positioning screw nut and can slide on the upper surface of the wire rope positioning support table in the axial direction; the hydraulic pump positioning bolt coaxially fixes the bidirectional hydraulic pump and the wire rope positioning main roller on the wire rope positioning main slide table. Wire rope positioning main roller drives hydraulic pump spindle synchronization Rotate; the wire rope positioning auxiliary sliding table is provided on the upper surface of the wire rope positioning supporting table, the wire rope positioning auxiliary sliding table is provided with a wire rope positioning auxiliary roller, the axis of the wire rope positioning main roller and the wire rope positioning auxiliary roller are on a straight line; The wire rope positioning main slide table and the wire rope positioning auxiliary slide table are provided with collinear through holes on both sides, and the wire rope clamping bolt passes through the through hole from one end to connect the wire rope positioning main slide table and the wire rope positioning auxiliary slide table together , And tightened at the other end by the wire rope clamping nut, so that the wire rope positioning main roller and the wire rope positioning auxiliary roller can clamp the steel wire rope under squeezing force; the rim of the wire rope positioning main roller and the wire rope positioning auxiliary roller are provided with The groove is equipped with a steel wire rope positioning friction pad, and the steel wire rope positioning friction pad is provided with a rope groove.

The loading hydraulic cylinder is a double-acting hydraulic cylinder. The loading hydraulic cylinder includes a loading hydraulic cylinder sleeve, a loading hydraulic cylinder support and a loading hydraulic cylinder piston rod; the front end of the loading hydraulic cylinder piston rod is provided with a steel wire lock sleeve, and The two ends of the tested steel wire rope connected to the loading hydraulic cylinder are clamped in the steel wire rope lock via the installed steel wire rope lock, and the tensile force is applied to the steel wire rope by the loading hydraulic cylinder; the two loading hydraulic cylinders are the driving side and the load side, The hydraulic cylinder on the drive side adjusts the oil pressure of the oil inlet to drive the piston rod of the loading hydraulic cylinder to pull the steel wire rope under test, and the hydraulic cylinder on the load side adjusts the hydraulic pressure of the oil outlet to suppress the steel wire rope under test from dragging and loading the piston rod of the hydraulic cylinder.

The length of the piston rod of the loading hydraulic cylinder is greater than the circumference of the largest diameter friction hoist.

The number of the wire rope positioning devices depends on the test accuracy of different diameter friction hoists.

The hole density of the positioning holes of the hydraulic cylinder in the vertical direction depends on the vertical distance clamped by the two loading hydraulic cylinders to meet the test requirements of friction elevators with different diameters.

The hole density of the positioning holes along the circumferential direction depends on the arc formed by the surrounding angle positioning device and several wire rope positioning devices to meet the test requirements of friction hoists with different diameters and surrounding angles.

The test method using the above-mentioned friction hoist wire rope bearing performance test device includes the following steps:

(a) Install the surrounding angle positioning support platform on the surrounding angle positioning support, the surrounding angle positioning screw, the surrounding angle positioning screw nut and the surrounding angle positioning handwheel are coaxially installed to position the surrounding angle The sliding table is fixed on the surrounding angle positioning screw nut, the positioning telescopic rod sleeve is axially installed on the surrounding angle positioning sliding table, and the surrounding angle positioning friction pad is installed in the groove of the surrounding angle positioning roller , The wrap angle positioning roller is installed on the top of the positioning telescopic rod and assembled into the wrap angle positioning device;

(b) Install the wire rope positioning support on the wire rope positioning support, the wire rope positioning screw, the wire rope positioning screw nut and the wire rope positioning handwheel are coaxially installed, and fix the wire rope positioning main slide table on the wire rope positioning screw nut, The wire rope positioning friction pad is installed in the grooves of the wire rope positioning main roller and the wire rope positioning auxiliary roller. The hydraulic pump positioning bolt is used to coaxially fix the bidirectional hydraulic pump and the wire rope positioning main roller on the wire rope positioning main slide, and the wire rope is used to clamp The bolt passes through the through hole from one end of the slide table to connect the main wire rope positioning slide table and the wire rope positioning auxiliary slide table together, and is fixed at the other end of the slide table with a wire rope clamping nut to assemble several wire rope positioning devices;

(c) Based on the diameter dimension D and the wrap angle α of the friction hoist to which the tested wire rope belongs, install the wrap angle positioning device in the vertical direction on the straight section of the wire rope positioning platform according to the positioning hole at the set position. The wire rope positioning device is installed on the arc section of the wire rope positioning platform at intervals in the radial direction. Turn the wire rope positioning handwheel to move the wire rope positioning screw nut forward and backward, and turn the wrap angle positioning hand wheel to push the wrap angle positioning screw nut forward and backward. The fine adjustment of the telescopic length of the positioning telescopic rod pushes the enveloping angle positioning roller to move forward and backward in a small range, and finally the arc diameter enclosed by the enveloping angle positioning roller and the outer edges of several wire rope positioning main rollers is equal to the diameter of the friction elevator The arc angle is equal to the wrap angle α of the friction hoist. The two loading hydraulic cylinders are arranged side by side on the hydraulic cylinder positioning platform through the hydraulic cylinder positioning holes in the horizontal direction. The vertical distance between the two hydraulic cylinders is:

(d) According to the telescopic length of the piston rod of the loading hydraulic cylinder and the diameter dimension D of the friction hoist, intercept the tested wire rope of the required length, install the wire rope locks at the two ends of the tested wire rope, and clamp the wire rope lock in In the wire rope lock sleeve, the arc part of the tested wire rope is embedded in the rope groove of the surrounding angle positioning friction pad and the wire rope positioning friction pad;

(e) Adjust the oil pressure of the oil inlet of the hydraulic cylinder on the drive side and the oil outlet of the hydraulic cylinder on the load side, and start to load the hydraulic cylinder with a small oil pressure. At this time, the steel wire rope under tension is tightened, and the wire rope clamping nut is tightened to make the steel wire rope The positioning friction pad tightly clamps the wire rope to avoid relative sliding between the positioning friction pad of the wire rope and the tested wire rope;

(f) According to the diameter dimension D of the friction hoist and the enclosing angle α, simulate the heavy load side load F _L1 and the no load side load F _L2 on both sides of the actual friction lift, and the tested wire rope (3) The tangential force distribution f _θ within the envelope angle α:

In the formula: B is the width of the actual friction pad of the hoist, μ is the friction coefficient of the actual friction pad,

Is the angle of the creeping arc in the enveloping arc under the action of F _L1 and F _L2 ,

Thus, the tangential force f ₁ , f ₂ , f ₃ , f ₄ , f ₅ , f ₆ , f _{7 of the} tested wire rope at each wire rope positioning main roller is obtained, and the oil pressure of the bidirectional hydraulic pump is adjusted accordingly , Add additional rotation damping value to the wire rope positioning main roller by the following formula:

In the formula: k is the compensation coefficient, r is the radius of the wire rope positioning main roller (5-g),

When the hydraulic cylinder is loaded to pull the tested wire rope, F _L1 = kf ₁ + kf ₂ + kf ₃ + kf ₄ + kf ₅ + kf ₆ + kf ₇ + F _L2 to simulate the wire rope drag process of the actual friction hoist, and The creeping process of the wire rope in the enveloping arc during the friction lifting process;

When it is necessary to test the tensile performance of the steel wire rope, adjust the hydraulic pressure of the loading hydraulic cylinder and the bidirectional hydraulic pump, and the driving side and the loading side hydraulic cylinder drag the tested steel wire rope to simulate the overload and secondary loading conditions of the actual friction hoist. By detecting whether the change of the unit elongation of the wire rope is within the allowable threshold, it can be detected whether the tested wire rope meets the requirements of tensile properties;

When it is necessary to test the fatigue life of the wire rope, adjust the oil pressure of the loading hydraulic cylinder and the bidirectional hydraulic pump, the driving side and the loading side hydraulic cylinder simulate the coal lifting process of the actual friction hoist, and alternately pull and drag the tested wire rope at this time. By detecting whether the percentage of broken wires and the unit elongation of the wire rope are within the allowable threshold during multiple cycles, it can be detected whether the tested wire rope meets the fatigue life requirements. At the same time, because there is no actual time limit for the coal loading and unloading process, by adjusting The flow of loading hydraulic cylinder and bidirectional hydraulic pump can greatly speed up the testing process.

Beneficial effect: Due to the adoption of the above technical solution, the friction hoist steel wire bearing performance testing device provided by the present invention can perform a unified test on the bearing performance of vertical shaft friction hoisting steel wire ropes with different drum diameters and drum wrapping angles. The different types of steel wire ropes are uniformly checked before on-site installation, which avoids the repeated testing investment of large-scale production enterprises and improves the manufacturing quality of small-scale production enterprises, so as to standardize the steel wire rope market and ensure the load-bearing performance of the steel rope. The present invention is based on the principle of double-acting hydraulic cylinder driving wire rope and bidirectional hydraulic pump to provide load damping to simulate the actual friction lifting process. The wire rope positioning device and enveloping angle positioning device based on screw drive can be used to adapt to different reel diameters. Different enveloping angles can be applied; hydraulic cylinder loading can simulate vicious working conditions such as overload and secondary heavy load, and test the tensile performance of the steel wire rope under extreme working conditions; the hydraulic pump provides load damping to simulate the cutting of the steel wire rope along the actual drum Directional force distribution, thereby simulating the creeping process of the steel wire rope in the enveloping arc, so as to accurately test the fatigue life of the steel wire rope, so as to realize the accurate test of the steel wire rope load bearing performance, and can meet the test of friction hoists with different drum diameters and different enveloping angles Demand, simple structure, high reliability and strong versatility are of great significance to ensure the improvement of the load-bearing performance of the steel wire rope and the safety of friction.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of the device structure of the present invention;

2 is a schematic structural view of the surrounding angle positioning device of the present invention;

3 is a schematic structural view of the wire rope positioning and loading device of the present invention;

4 is a schematic diagram of the installation of the steel wire rope of the loading hydraulic cylinder of the present invention;

5 is a schematic diagram of the test principle of the device of the present invention.

In the picture: 1—load hydraulic cylinder, 1-a—load hydraulic cylinder liner, 1-b—load hydraulic cylinder support, 1-c—load hydraulic cylinder piston rod, 1-d—wire rope lock sleeve, 2—hydraulic Cylinder positioning platform, 2-a—hydraulic cylinder positioning hole, 3-steel wire rope, 3-a—steel wire rope lock, 4-wrapping angle positioning device, 4-a—locating telescopic rod sleeve, 4-b—wrapping angle Positioning slide, 4-c—enveloping angle positioning screw, 4-d—enveloping angle positioning screw nut, 4-e—locating telescopic rod, 4-f—enveloping angle positioning roller, 4-g—enclosure Friction liner for wrap angle positioning, 4-h— wrap around angle positioning support, 4-i— wrap around angle positioning support, 4-j— wrap around angle positioning handwheel, 5-—wire rope positioning device, 5-a— Wire rope positioning support platform, 5-b—two-way hydraulic pump, 5-c—wire rope positioning screw, 5-d—wire rope positioning support, 5-e—hydraulic pump positioning bolt, 5-f—hydraulic pump spindle, 5- g—Wire rope positioning main roller, 5-h—Wire rope positioning main slide, 5-i—Wire rope positioning friction pad, 5-j—Wire rope clamping bolt, 5-k—Wire rope positioning vice roller, 5-l—Wire rope Positioning auxiliary sliding table, 5-m—wire rope positioning Screw nut, 5-n- rope clamping nut, 5-o- handwheel positioning rope, rope 6- positioning platform, 6-a- positioning hole.

detailed description

The present invention will be further described below with reference to the embodiments in the drawings:

As shown in FIG. 1, a friction hoist wire rope bearing performance testing device of the present invention is mainly composed of two loading hydraulic cylinders 1, a hydraulic cylinder positioning platform 2, an enveloping angle positioning device 4, a number of wire rope positioning devices 5, and a wire rope The positioning platform 6 is composed of the hydraulic cylinder positioning platform 2 arranged in a vertical direction, the wire rope positioning platform 6 and the hydraulic cylinder positioning platform 2 are in the same plane and are arranged oppositely, and the hydraulic cylinder positioning platform 2 is provided with several rows of hydraulic pressure arranged in parallel Cylinder positioning hole 2-a, the wire rope positioning platform 6 is provided with a number of rows of positioning holes 6-a arranged in a circle, two loading hydraulic cylinders 1 are arranged side by side on the hydraulic cylinder positioning platform 2 through the hydraulic cylinder positioning holes 2-a in the horizontal direction Upper; enveloping angle positioning device 4 is provided on the straight section of the wire rope positioning platform 6 through the positioning hole 6-a in the vertical direction; several wire rope positioning devices 5 are provided on the circle of the wire rope positioning platform 6 through the positioning hole 6-a Arc.

As shown in FIG. 2, the surrounding angle positioning device 4 includes a positioning telescopic rod sleeve 4-a, an surrounding angle positioning slide 4-b, an surrounding angle positioning screw 4-c, and an surrounding angle positioning wire Bar nut 4-d, positioning telescopic rod 4-e, surrounding angle positioning roller 4-f, surrounding angle positioning friction pad 4-g, surrounding angle positioning support platform 4-h, surrounding angle positioning support 4 -i and the wrap angle positioning handwheel 4-j; the wrap angle positioning support 4-h is set on the wrap angle positioning support 4-i, the wrap angle positioning screw 4-c, the wrap angle positioning The screw nut 4-d and the wrap angle positioning handwheel 4-j are coaxially arranged, and the rotation of the wrap angle positioning handwheel 4-j drives the wrap angle positioning screw 4-c to rotate, thereby pushing the wrap angle positioning screw The nut 4-d moves back and forth; the wrap angle positioning slide 4-b is fixed to the wrap angle positioning screw nut 4-d, which can slide on the upper surface of the wrap angle positioning support table 4-h in the axial direction to locate the telescopic rod The sleeve 4-a is arranged on the enveloping angle positioning sliding table 4-b in the axial direction, and the top of the positioning telescopic rod 4-e is provided with an enveloping angle positioning roller 4-f and an enveloping angle positioning roller 4-f wheel The edge is provided with a groove and a friction wrap 4-g around the wrap angle is installed. 4-g is provided with spacer rope grooves.

As shown in FIG. 3, the wire rope positioning device 5 consists of a wire rope positioning support 5-a, a bidirectional hydraulic pump 5-b, a wire rope positioning screw 5-c, a wire rope positioning support 5-d, and a hydraulic pump positioning bolt 5 -e, hydraulic pump spindle 5-f, wire rope positioning main roller 5-g, wire rope positioning main slide 5-h, wire rope positioning friction pad 5-i, wire rope clamping bolt 5-j, wire rope positioning auxiliary roller 5- k, wire rope positioning vice slide table 5-l, wire rope positioning screw nut 5-m, wire rope clamping nut 5-n and wire rope positioning hand wheel 5-o; wire rope positioning support table 5-a is set on the wire rope positioning support On 5-d, the wire rope positioning screw 5-c, the wire rope positioning screw nut 5-m and the wire rope positioning hand wheel 5-o are coaxially arranged, and the wire rope positioning hand wheel 5-o rotation drives the wire rope positioning screw 5-c to rotate , And then push the wire rope positioning screw nut 5-m to move forward and backward; the wire rope positioning main slide table 5-h is fixed to the wire rope positioning screw nut 5-m, and can slide on the upper surface of the wire rope positioning support table 5-a in the axial direction; hydraulic The pump positioning bolt 5-e coaxially fixes the bidirectional hydraulic pump 5-b and the steel wire rope positioning main roller 5-g to the steel wire rope. On the main sliding table 5-h, the steel wire rope positioning main roller 5-g drives the hydraulic pump spindle 5-f to rotate synchronously; the steel wire rope positioning auxiliary sliding table 5-l is provided on the upper surface of the steel wire rope positioning support table 5-a, on which a steel wire rope is provided The axis of the positioning auxiliary roller 5-k, the wire rope positioning main roller 5-g and the wire rope positioning auxiliary roller 5-k are on a straight line; the wire rope positioning main slide 5-h and the wire rope positioning auxiliary slide 5-l are in two The side is provided with collinear through holes, and the wire rope clamping bolt 5-j passes through the through hole from one end to connect the wire rope positioning main slide 5-h and the wire rope positioning auxiliary slide 5-l together, and passes the wire rope at the other end The clamping nut 5-n is tightened so that the wire rope positioning main roller 5-g and the wire rope positioning auxiliary roller 5-k can clamp the wire rope 3 under a certain squeezing force; the wire rope positioning main roller 5-g and the wire rope positioning auxiliary roller 5 -The rim of the k is provided with a groove and a steel wire positioning friction pad 5-i is installed, and the steel wire positioning friction pad 5-i is provided with a rope groove.

As shown in FIG. 4, the loading hydraulic cylinder 1 is a double-acting hydraulic cylinder, which is composed of a loading hydraulic cylinder sleeve 1-a, a loading hydraulic cylinder support 1-b, a loading hydraulic cylinder piston rod 1-c and a steel wire lock sleeve 1-d structure; the front end of the loading cylinder piston rod 1-c is provided with a wire rope lock sleeve 1-d. After installing the wire rope lock head 3-a at the ends of the wire rope 3, the wire rope lock head 3-a can be locked In the wire rope lock sleeve 1-d, the loading hydraulic cylinder 1 can exert tension on the wire rope 3; the two loading hydraulic cylinders 1 are the driving side and the loading side, and the driving side hydraulic cylinder drives the loading hydraulic cylinder piston by adjusting the oil pressure of the oil inlet The rod 1-c pulls the wire rope 3, and the load side hydraulic cylinder suppresses the wire rope 3 from dragging and loading the hydraulic cylinder piston rod 1-c by adjusting the oil pressure at the oil outlet.

The length of the piston rod 1-c of the loading hydraulic cylinder should be greater than the circumference of the largest diameter friction hoist; the number of the wire rope positioning devices 5 depends on the test accuracy of different diameter friction hoists; the positioning of the hydraulic cylinder The hole density of the hole 2-a in the vertical direction satisfies the vertical distance clamped by the two loading hydraulic cylinders 1 to meet the test requirements of friction elevators of different diameters; the hole density of the positioning hole 6-a in the circumferential direction meets the surrounding angle The arc formed by the positioning device 4 and several wire rope positioning devices 5 can meet the test requirements of friction hoists with different diameters and wrap angles.

The method for testing the load-bearing performance of the steel wire rope of the friction hoist of the present invention is shown in FIG. 5 and the specific steps are as follows:

(a) Install the enveloping angle positioning support platform 4-h on the enveloping angle positioning support 4-i, the enveloping angle positioning screw 4-c, the enveloping angle positioning screw nut 4-d and the enveloping angle The positioning handwheel 4-j is coaxially installed, and the surrounding angle positioning sliding table 4-b is fixed on the surrounding angle positioning screw nut 4-d, and the positioning telescopic rod sleeve 4-a is installed at the surrounding angle in the axial direction On the positioning slide 4-b, install the surrounding angle positioning friction pad 4-g in the groove of the surrounding angle positioning roller 4-f, and install the surrounding angle positioning roller 4-f on the positioning telescopic rod 4-e The top of the assembly is assembled into the surrounding angle positioning device 4;

(b) Install the wire rope positioning support 5-a on the wire rope positioning support 5-d, the wire rope positioning screw 5-c, the wire rope positioning screw nut 5-m and the wire rope positioning hand wheel 5-o are installed coaxially. The wire rope positioning main slide 5-h is fixed on the wire rope positioning screw nut 5-m, and the wire rope positioning friction pad 5-i is installed in the grooves of the wire rope positioning main roller 5-g and the wire rope positioning auxiliary roller 5-k , Use the hydraulic pump positioning bolt 5-e to fix the bidirectional hydraulic pump 5-b and the wire rope positioning main roller 5-g coaxially on the wire rope positioning main slide 5-h, and use the wire rope clamping bolt 5-j from the end of the slide Through the through hole, connect the wire rope positioning main slide 5-h and the wire rope positioning auxiliary slide 5-l together, and fix it with a wire rope clamping nut 5-n at the other end of the slide, assembling several wire rope positioning devices 5 ;

(c) Based on the diameter dimension D and the wrap angle α of the friction hoist to which the tested wire rope belongs, select the positioning hole 6-a at a suitable position, and install the wrap angle positioning device 4 in the vertical direction on the straight section of the wire rope positioning platform 6 , Install several wire rope positioning devices 5 along the radial direction on the arc section of the wire rope positioning platform 6, turn the wire rope positioning handwheel 5-o to push the wire rope positioning screw nut 5-m to move back and forth, turn the wrap angle to position the handwheel 4 -J push the enveloping angle positioning screw nut 4-d to move back and forth, fine-tune the telescopic length of the positioning telescopic rod 4-e to push the enveloping angle positioning roller 4-f to move back and forth in a small range, and finally make the enveloping angle positioning roller 4-f The diameter of the arc formed by the outer edges of the main rollers 5-g with several steel wire ropes is equal to the diameter D of the friction hoist, and the arc angle is equal to the enclosing angle α of the friction hoist. The cylinder positioning holes 2-a are arranged side by side on the hydraulic cylinder positioning platform 2 in the horizontal direction, and the vertical distance between the two hydraulic cylinders is:

(d) According to the expansion and contraction length of the piston rod 1-c of the loading hydraulic cylinder and the diameter D of the friction hoist, intercept the steel wire 3 to be tested of appropriate length, install the steel wire locks 3-a at the ends of the steel wire 3, and connect the steel wire rope The lock head 3-a is stuck in the wire rope lock sleeve 1-d, and the arc portion of the wire rope 3 is embedded in the rope groove of the surrounding angle positioning friction pad 4-g and the wire rope positioning friction pad 5-i;

(e) Adjust the oil pressure of the oil inlet of the hydraulic cylinder on the drive side and the oil outlet of the hydraulic cylinder on the load side, and start to load the hydraulic cylinder 1 with a small oil pressure. At this time, the wire rope 3 is tensioned, and the wire rope clamping nut 5-n is tightened , So that the steel wire positioning friction pad 5-i can tightly clamp the steel wire rope 3, to avoid relative sliding between the steel wire rope positioning friction pad 5-i and the steel wire rope 3;

(f) According to the diameter D of the friction hoist and the wrap angle α, simulate the heavy load side load F _L1 and the no load side load F _L2 on both sides of the actual friction lift, and obtain the cut of the wire rope 3 within the wrap angle α Force distribution:

Is the creep angle of the enveloping arc under the action of F _L1 and F _L2 to obtain the tangential force f ₁ , f ₂ , f ₃ , f ₄ , f _{5 of the} wire rope 3 at each wire rope positioning main roller 5-g , f ₆ , f ₇ , and then adjust the oil pressure of the pressure port of the bidirectional hydraulic pump 5-b accordingly, and add additional rotation damping to the wire rope positioning main roller 5-g:

Where: k is the compensation coefficient, r is the radius of the wire rope positioning main roller 5-g, when the hydraulic cylinder 1 pulls the wire rope 3, F _L1 = kf ₁ + kf ₂ + kf ₃ + kf ₄ + kf ₅ + kf ₆ + kf ₇ + F _L2 to simulate the wire rope dragging process of the actual friction hoist and the wire rope creeping process in the enveloping arc of the friction lifting process;

(g) Adjust the oil pressure of loading hydraulic cylinder 1 and bidirectional hydraulic pump 5-b:

When the tensile performance of the steel wire rope 3 needs to be tested, the hydraulic cylinders on the driving side and the loading side drag the steel wire rope 3 to simulate the working conditions such as overload and secondary loading of the actual friction hoist. Within the allowable threshold, it can be detected whether the tested wire rope 3 meets the tensile performance requirements;

When the fatigue life of the wire rope 3 needs to be tested, the hydraulic cylinders on the driving side and the loading side simulate the coal lifting process of the actual friction hoist, alternately pulling and dragging the wire rope 3, at this time by detecting the broken wire percentage of the wire rope 3 within a certain cycle period And whether the change of unit elongation is within the allowable threshold, can detect whether the tested wire rope 3 meets the fatigue life requirements, and because there is no actual time limit for the coal loading and unloading process, by adjusting the loading hydraulic cylinder 1 and the bidirectional hydraulic pump 5-b The flow rate can greatly speed up the testing process.

Claims

A friction hoist steel wire rope bearing performance testing device includes a loading hydraulic cylinder (1) and a hydraulic cylinder positioning platform (2) connected to the steel wire rope (3) to be tested, which is characterized in that it also includes a wrap angle positioning device (4), Several wire rope positioning devices (5) and wire rope positioning platforms (6), the hydraulic cylinder positioning platforms (2) are arranged in a vertical direction, and there are several rows of hydraulic cylinder positioning holes (2-a) arranged in parallel on the The above-mentioned wire rope positioning platform (6) is in the shape of an arc, and is arranged in the same plane and opposite to the hydraulic cylinder positioning platform (2). The wire rope positioning platform (6) is provided with a number of rows of positioning holes (6-a) arranged in a circle ), There are two loading hydraulic cylinders (1), which are arranged side by side on the hydraulic cylinder positioning platform (2) in the horizontal direction through the hydraulic cylinder positioning holes (2-a); the surrounding angle positioning device (4) Set on the straight section of the wire rope positioning platform (6) in the vertical direction through the positioning hole (6-a); several wire rope positioning devices (5) are installed on the wire rope positioning platform (6) in the radial direction through the positioning hole (6-a) ) On the arc segment.
The friction hoist steel wire bearing performance testing device according to claim 1, characterized in that: the surrounding angle positioning device (4) includes a positioning telescopic rod sleeve (4-a), an surrounding angle positioning slide ( 4-b), surrounding angle positioning screw (4-c), surrounding angle positioning screw nut (4-d), positioning telescopic rod (4-e), surrounding angle positioning roller (4-f), Surrounding angle positioning friction pad (4-g), surrounding angle positioning support platform (4-h), surrounding angle positioning support (4-i) and surrounding angle positioning handwheel (4-j); The surrounding angle positioning support platform (4-h) is provided on the surrounding angle positioning support (4-i), the surrounding angle positioning screw (4-c), the surrounding angle positioning screw nut (4 -d) Coaxial arrangement with the wrap angle positioning handwheel (4-j), the rotation of the wrap angle positioning handwheel (4-j) drives the wrap angle positioning screw (4-c) to rotate, and then pushes Enveloping angle positioning screw nut (4-d) moves back and forth; the enveloping angle positioning slide table (4-b) is fixed to the enveloping angle positioning screw nut (4-d) and can be axially The upper surface of the wrap angle positioning support table (4-h) slides, and the positioning telescopic rod sleeve (4-a) is axially arranged on the wrap angle positioning table (4-b), and the positioning The top end of the shrink rod (4-e) is provided with a wrap angle positioning roller (4-f). The rim of the wrap angle positioning roller (4-f) is provided with a groove, and a wrap angle is installed in the groove The positioning friction pad (4-g) is provided with a rope groove.
The friction rope hoisting performance testing device of claim 1, characterized in that the wire rope positioning device (5) includes a wire rope positioning support platform (5-a), a bidirectional hydraulic pump (5-b), and a wire rope Positioning screw (5-c), wire rope positioning support (5-d), hydraulic pump positioning bolt (5-e), hydraulic pump spindle (5-f), wire rope positioning main roller (5-g), wire rope positioning Main slide (5-h), wire rope positioning friction pad (5-i), wire rope clamping bolt (5-j), wire rope positioning auxiliary roller (5-k), wire rope positioning auxiliary slide (5-l) , The wire rope positioning screw nut (5-m), the wire rope clamping nut (5-n) and the wire rope positioning hand wheel (5-o); the wire rope positioning support platform (5-a) is provided on the wire rope positioning support ( 5-d), the wire rope positioning screw (5-c), the wire rope positioning screw nut (5-m) and the wire rope positioning hand wheel (5-o) are arranged coaxially, and the wire rope positioning hand wheel (5 -o) Rotate the wire rope positioning screw (5-c) to rotate, and then push the wire rope positioning screw nut (5-m) to move forward and backward; the wire rope positioning main slide (5-h) is fixed to the wire rope positioning screw nut (5-m) up, along Slide on the upper surface of the wire rope positioning support platform (5-a); the hydraulic pump positioning bolt (5-e) coaxially fixes the bidirectional hydraulic pump (5-b) and the wire rope positioning main roller (5-g) to the wire rope On the positioning main slide (5-h), the wire rope positioning main roller (5-g) drives the hydraulic pump spindle (5-f) to rotate synchronously; the wire rope positioning sub-slide (5-l) is set on the wire rope positioning On the upper surface of the support table (5-a), a steel wire rope positioning auxiliary slide (5-l) is provided with a steel wire rope positioning auxiliary roller (5-k), the steel wire rope positioning main roller (5-g) and the steel wire rope positioning auxiliary roller (5-k) 5-k) The axis is on a straight line; the steel wire rope positioning main slide table (5-h) and the steel wire rope positioning auxiliary slide table (5-l) are provided with collinear through holes on both sides, and the steel wire rope is clamped The bolt (5-j) passes through the through hole from one end to connect the wire rope positioning main slide (5-h) and the wire rope positioning auxiliary slide (5-l) together, and at the other end, the nut (5- n) Tighten so that the steel wire rope positioning main roller (5-g) and the steel wire rope positioning auxiliary roller (5-k) can clamp the steel wire rope under test (3) under squeezing force; the steel wire rope positioning main roller (5-g) And steel rope positioning wheel (5-k) wheel The edge is provided with a groove, and a steel wire positioning friction pad (5-i) is installed in the groove, and the steel wire positioning friction pad (5-i) is provided with a rope groove.
The friction hoist wire rope bearing performance testing device according to claim 1, characterized in that the loading hydraulic cylinder (1) is a double-acting hydraulic cylinder, and the loading hydraulic cylinder includes a loading hydraulic cylinder sleeve (1-a), The loading hydraulic cylinder support (1-b) and the loading hydraulic cylinder piston rod (1-c); the front end of the loading hydraulic cylinder piston rod (1-c) is provided with a steel wire lock sleeve (1-d), and the loading hydraulic pressure The two ends of the tested wire rope (3) connected to the cylinder (1) are clamped in the wire rope lock sleeve (1-d) by installing the wire rope lock (3-a), and the tested cylinder is loaded by the hydraulic cylinder (1) The steel wire rope (3) exerts a pulling force; the two loading hydraulic cylinders are the driving side and the load side of each other. The driving side hydraulic cylinder drives the loading hydraulic cylinder piston rod (1-c) to pull the steel wire rope (3) under test by adjusting the hydraulic pressure of the oil inlet. The hydraulic cylinder on the load side adjusts the oil pressure of the oil outlet to suppress the test wire rope (3) from dragging and loading the piston rod (1-c) of the hydraulic cylinder.
The friction hoist wire rope bearing performance testing device according to claim 1, characterized in that the length of the loading hydraulic cylinder piston rod (1-c) is greater than the circumference of the largest diameter friction hoist.
The device for testing the load-bearing performance of a steel wire rope of a friction hoist according to claim 1, characterized in that the number of the steel wire rope positioning devices (5) depends on the test accuracy of friction hoists of different diameters.
The friction hoist wire rope bearing performance testing device according to claim 1, characterized in that the hole density of the positioning holes (2-a) of the hydraulic cylinder in the vertical direction depends on the clamping of two loading hydraulic cylinders (1) The vertical distance is suitable for the test requirements of friction elevators with different diameters.
The device for testing the load-bearing performance of a steel wire rope of a friction hoist according to claim 1, characterized in that the hole density of the positioning holes (6-a) in the circumferential direction depends on the surrounding angle positioning device (4) and several steel wire ropes The arc formed by the positioning device (5) is suitable for the test needs of friction hoists with different diameters and wrap angles.
A testing method using the friction hoist steel wire rope bearing performance testing device of claim 1, 2, 3 or 4 is characterized by the following steps:

(a) Install the wrap angle positioning support platform (4-h) on the wrap angle positioning support (4-i), the wrap angle positioning screw (4-c), the wrap angle positioning screw nut ( 4-d) Install coaxially with the wrap angle positioning handwheel (4-j), fix the wrap angle positioning slide (4-b) on the wrap angle positioning screw nut (4-d), and position the expansion and contraction The rod sleeve (4-a) is installed on the surrounding angle positioning slide table (4-b) in the axial direction, and the surrounding angle positioning friction pad (4-g) is installed on the surrounding angle positioning roller (4-f) ) In the groove, the wrap angle positioning roller (4-f) is installed on the top of the positioning telescopic rod (4-e) to assemble the wrap angle positioning device (4);

(b) Install the wire rope positioning support (5-a) on the wire rope positioning support (5-d), the wire rope positioning screw (5-c), the wire rope positioning screw nut (5-m) and the wire rope positioning hand The wheels (5-o) are installed coaxially, the wire rope positioning main slide (5-h) is fixed on the wire rope positioning screw nut (5-m), and the wire rope positioning friction pad (5-i) is installed on the wire rope positioning main In the groove of the roller (5-g) and the wire rope positioning auxiliary roller (5-k), use the hydraulic pump positioning bolt (5-e) to position the bidirectional hydraulic pump (5-b) and the wire rope to the main roller (5-g) Coaxially fixed on the wire rope positioning main slide (5-h), use the wire rope clamping bolt (5-j) from one end of the slide through the through hole to position the wire rope positioning main slide (5-h) and the wire rope positioning auxiliary slide The tables (5-l) are connected together, and fixed at the other end of the slide table with wire rope clamping nuts (5-n), assembled into several wire rope positioning devices (5);

(c) Based on the diameter dimension D and the wrap angle α of the friction hoist to which the tested wire rope belongs, install the wrap angle positioning device (4) on the wire rope positioning platform in the vertical direction according to the positioning hole (6-a) at the set position (6) On the straight line segment, install several wire rope positioning devices (5) on the arc segment of the wire rope positioning platform (6) along the radial direction, turn the wire rope positioning handwheel (5-o) to push the wire rope positioning screw The nut (5-m) moves back and forth, turn the wrap angle positioning hand wheel (4-j) to push the wrap angle positioning screw nut (4-d) to move forward and backward, and fine-tune the telescopic length of the positioning telescopic rod (4-e) to push The enveloping angle positioning roller (4-f) moves back and forth in a small range, and finally the diameter of the arc formed by the enclosing angle positioning roller (4-f) and the outer edges of several wire rope positioning main rollers (5-g) is equal to the friction The diameter D of the hoist and the arc angle are equal to the wrap angle α of the friction hoist. Two loading hydraulic cylinders (1) are arranged side by side on the hydraulic cylinder positioning platform through the hydraulic cylinder positioning holes (2-a) in the horizontal direction ( 2) The vertical distance between the two hydraulic cylinders is:

(d) According to the telescopic length of the piston rod (1-c) of the loading hydraulic cylinder and the diameter D of the friction hoist, intercept the tested wire rope (3) of the required length and install it at the ends of the tested wire rope (3) Wire rope lock (3-a), the wire rope lock (3-a) is clamped in the wire rope lock sleeve (1-d), the arc part of the tested wire rope (3) is embedded in the surrounding angle positioning friction pad (4-g) and wire rope positioning friction pad (5-i) in the rope groove;

(e) Adjust the oil pressure of the oil inlet of the hydraulic cylinder on the drive side and the oil outlet of the hydraulic cylinder on the load side, and start loading the hydraulic cylinder (1) with a small oil pressure. Hold the nut (5-n) tightly, so that the steel wire positioning friction pad (5-i) tightly clamps the steel wire rope (3), to avoid the relative occurrence between the steel wire positioning friction pad (5-i) and the tested steel wire rope (3) slide;

(f) According to the diameter dimension D of the friction hoist and the enclosing angle α, simulate the heavy load side load F L1 and the no load side load F L2 on both sides of the actual friction lift, and the tested wire rope (3) The tangential force distribution f θ within the envelope angle α:

In the formula: B is the width of the actual friction pad of the hoist, μ is the friction coefficient of the actual friction pad,
Is the angle of the creeping arc in the enveloping arc under the action of F L1 and F L2 ,

Thus, the tangential force f 1 , f 2 , f 3 , f 4 , f 5 , f 6 , f 7 of the tested wire rope (3) at each wire rope positioning main roller (5-g) is obtained, and the two-way is adjusted accordingly The hydraulic pressure of the hydraulic pump (5-b) is added to the wire rope positioning main roller (5-g) by the following formula:

In the formula: k is the compensation coefficient, r is the radius of the wire rope positioning main roller (5-g),

When the loading hydraulic cylinder (1) pulls the tested wire rope (3), F L1 = kf 1 + kf 2 + kf 3 + kf 4 + kf 5 + kf 6 + kf 7 + F L2 to simulate the actual friction hoist The process of dragging the wire rope, and the creeping process of the wire rope in the enveloping arc of the friction lifting process;

When it is necessary to test the tensile performance of the wire rope, adjust the hydraulic pressure of the loading hydraulic cylinder (1) and the bidirectional hydraulic pump (5-b), and the hydraulic cylinder on the drive side and the loading side drags the tested wire rope (3) to simulate the actual friction hoist In the overload and secondary loading conditions, at this time, by detecting whether the change in the unit elongation of the wire rope is within the allowable threshold, it can be detected whether the tested wire rope (3) meets the tensile performance requirements;

When it is necessary to test the fatigue life of the wire rope, adjust the oil pressure of the loading hydraulic cylinder (1) and the bidirectional hydraulic pump (5-b). The driving side and loading side hydraulic cylinders simulate the actual coal lift process of the friction elevator, and alternately pull and Drag the tested wire rope (3), at this time, by detecting whether the percentage of broken wires and unit elongation of the wire rope (3) in multiple cycles are within the allowable threshold, it can detect whether the tested wire rope (3) meets Fatigue life requirements, and because there is no actual time limit for loading and unloading coal, by adjusting the flow of the loading hydraulic cylinder (1) and the bidirectional hydraulic pump (5-b), the test process can be greatly accelerated.