AU2019357558B2

AU2019357558B2 - Endless-rope-type vertical shaft lifting joint debugging and testing apparatus and method

Info

Publication number: AU2019357558B2
Application number: AU2019357558A
Authority: AU
Inventors: Qiang NIU; Zhongqiu WANG; Shixiong Xia; Yong Zhou
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2018-10-10
Filing date: 2019-02-22
Publication date: 2022-09-22
Anticipated expiration: 2039-02-22
Also published as: AU2019357558A1; CN109205428A; WO2020073582A1; CN109205428B

Abstract

Disclosed is an endless-rope-type vertical shaft lifting joint debugging and testing apparatus. The apparatus is composed of a support foundation (3), a hydraulic loading apparatus (1), a winding guide and loading apparatus (2) and an endless steel wire rope (4), wherein the hydraulic loading apparatus (1) is mounted on a platform of the support foundation (3) in a straddling manner in a horizontal transverse direction, and the winding guide and loading apparatus (2) is mounted at the bottom of an inner side of a sandwiched wall of two sub-foundations of the support foundation (3) in the horizontal transverse direction. By means of a closed cycle of an endless rope, different lifting distances and lifting speeds can be simulated, and on the basis of principles of a hydraulic cylinder pressing against the steel wire rope and a bidirectional hydraulic pump providing load damping, loads on two sides of a winding drum are simulated. The winding guide and loading apparatus based on lead screw drive is used for being adapted to different diameters of the winding drum, and a rope distance positioning plate is used for being adapted to different numbers of steel wire ropes and different steel wire rope spacing so as to reliably evaluate the bearing performance of a main shaft apparatus, the slide-proof performance of a friction pad and the braking performance of a brake, such that joint debugging and testing can be performed on vertical shaft lifters of various specifications before on-site installation.

Description

ENDLESS-ROPE-TYPE VERTICAL SHAFT LIFTING JOINT DEBUGGING AND TESTING APPARATUS AND METHOD

Technical field

The present invention relates to joint debugging and testing apparatus and method applicable to vertical shaft hoists.

Background Art

As the main mine hoisting equipment, vertical shaft hoist undertake important tasks of coal gangue hoisting, material lowering, and personnel and equipment lifting, and is the hinge between the underground area and the ground area in coal mines. The joint debugging and testing of a hoist refers to testing whether the main shaft device (including drum, main shaft, and bearing block) and the braking system can adapt to normal and extreme working conditions after the main shaft device, liner, braking system and other accessories are installed successfully, and is a key step before the field installation of the hoist. In addition, the field installation of a vertical shaft hoist (especially a shaft tower-type vertical shaft hoist), which is large-size infrastructure equipment installed in a one-off manner, involves high installation cost. Therefore, the joint debugging and testing before leaving the factory must comprehensively reflect the driving and braking performance of the mine hoist, in order to avoid the huge installation and debugging cost incurred by secondary installation.

At present, the joint debugging and testing of a vertical shaft hoist is mainly carried out in a zero-load operation state, i.e., the main shaft device is driven by a motor to operate freely without load, and no load testing is carried out. Consequently, the bearing capacity of the main shaft device, the anti-slip property of the liner, and the braking performance of the brake, which are crucial for the vertical shaft hoisting system, can't be evaluated accurately. In view of the various geological conditions in coal mines, there are different demands for the hoisting load and hoisting speed, which lead to a variety of vertical shaft hoists with different drum diameters, different drum wrap angles, different quantities of steel wire ropes, and different pitches between steel wire ropes. Consequently, it is difficult to use a universal apparatus to test the performance of the hoists. However, respectively setting up testing devices for vertical shaft hoists of different specifications will result in very high construction and operation costs, and can't meet the requirement for economy. Therefore, it is difficult for the enterprise to set up respective loading and braking test platforms for vertical shaft hoists of different models before leaving the factory. At present, special joint debugging and testing apparatuses are unavailable, and the enterprise mainly focuses on theoretical calculation and 3D mechanical simulation.

At present, the researches on the testing of mine hoisting systems mainly focus on testing for mines in service. For example, the method for monitoring the state of deep shaft hoisting equipment disclosed in the Patent Application No. CN201710531454.5 can extract fault signals from mixed monitoring signals on the basis of signal fusion, so as to monitor the operating state of the system. In addition, some researchers have set up a variety of testing platforms to test the performance of hoisting systems. For example, the testing platform for extra-deep mine shaft hoisting system disclosed in Patent No. ZL 201410528414.1 utilizes horizontal dragging with a motor to replace the vertical hoisting under actual operating conditions to simulate multiple mine hoisting functions; the multi-functional simulation and testing platform for extra-deep mine shaft hoisting system disclosed in the Patent No. ZL 201610118998.4 can simulate the movement state of extra-deep mine shaft hoisting equipment under actual operating conditions, so as to acquire main performance parameters of the hoisting equipment under fault conditions; the impact and friction system of winding hoisting steel wire rope in kilometer deep shaft disclosed in Patent No. ZL 201410728399.5 can simulate the impact and friction condition of a steel wire rope under different rotation speeds, different accelerations, different impact velocities, and different specific contact pressures. The above researches mainly have the following problems: firstly, the researches mainly focus on the state monitoring of apparatuses in service, but is short of performance test of vertical shaft hoisting systems before installation, which can uniformly check the different models of vertical shaft hoisting systems produced by different manufacturers before field installation, avoid the cost of repeated test for large-scale manufacturers, improve the manufacturing quality for small-scale manufacturers, and ensure the safety of hoisting systems from the source; secondly, the researches mainly involve the testing of a single type of hoisting system, but cannot effectively adapt to hoisting systems with different drum diameters, different drum wrap angles, different quantities of steel wire ropes, and different pitches between steel wire ropes; thirdly, there is no loading test before the installation, and the bearing capacity of the main shaft device, the anti-slip property of the liner, and the braking performance of the brake can't be evaluated accurately; fourthly, the testing for mines in service can't effectively utilize the change of characteristic parameters of the main shaft device under zero-load and heavy-load conditions, which are important characteristics for diagnosing the defects of the main shaft device, such as abnormal deformation and cracks, etc.; besides, it is impossible to simulate severe conditions such as cage jamming and secondary loading, etc., which are important references for judging whether the main shaft device, friction liner, and braking system can endure extreme operating conditions. Therefore, it is necessary to develop a joint debugging and testing apparatus for vertical shaft hoists, which can perform joint debugging and test for the main shaft devices, liners and braking systems of different types of hoisting systems, and simulate normal operating conditions such as zero-load and heavy-load, as well as extreme operating conditions such as cage jamming and secondary loading, so as to accurately evaluate the bearing capacity of the main shaft device, the anti-slip property of the liner, and the braking performance of the brake, which is of great significance for ensuring the safety of vertical shaft hoisting.

Contents of the Invention

Technical Problem: to overcome the drawbacks in the prior art, the present invention provides ajoint debugging and testing apparatus for endless rope-type vertical shaft hoist, which has a simple structure and is reliable and convenient, and provides a joint debugging and testing method.

Technical scheme: In order to achieve above object, the present invention provides a joint debugging and testing apparatus for endless rope-type vertical shaft hoist, comprising a guide wheel of a tested vertical shaft hoist, and a main shaft device of the tested vertical shaft hoist, said main shaft device consisting of a motor, a bearing block, a main shaft, a drum, a brake disc, a friction liner, a brake supporting plate, and a brake; the joint debugging and testing apparatus further comprises a supporting base, a hydraulic loading device, a winding guide loading device, and an endless steel wire rope, the supporting base is composed of two identical sub-bases, which are step-shaped and arranged symmetrically at interval in horizontal transverse direction, and form a platform I, a platform II, and a platform III; the main shaft device of the tested vertical shaft hoist is mounted in a straddling manner in the horizontal transverse direction on the platform I of the supporting base, and guide wheel of the tested vertical shaft hoist is mounted in a straddling manner in the horizontal transverse direction on the platform II of the supporting base; hydraulic loading device is arranged in a straddling manner in the horizontal transverse direction on the platform III of the supporting base; the winding guide loading device is arranged in the horizontal transverse direction on the bottom of the inner side of sandwiched wall between the two sub-bases of the supporting base, and the axis of the winding guide loading device and the axis of the main shaft device are parallel to each other and in the same vertical plane; the hydraulic loading device comprises one loading cylinder and a plurality of balancing cylinders, the loading cylinder comprises a loading cylinderjacket and a loading cylinder piston rod, hydraulic loading pedestals are provided in front of and behind the loading cylinder jacket, and each of the plurality of balancing cylinders comprises a balancing cylinder jacket and a balancing cylinder piston rod; the plurality of balancing cylinders are fixed on one side of a rope pitch positioning plate at intervals by positioning fixtures respectively, the middle part of the other side of the positioning plate and the loading cylinder piston rod are integrally connected, the top end of each balancing cylinder piston rod is provided with a roller clamping plates, a loading roller is provided between the roller clamping plates, a loading liner is provided on the rim of the loading roller, the loading liner has a rope groove, and the pressure-bearing cavities of all balancing cylinders communicate with each other through pipelines; the winding guide loading device comprises damping loading devices, winding radius positioning devices, and winding radius positioning plates; the winding radius positioning plates are semicircular, two winding radius positioning plates are arranged opposite to each other in horizontal longitudinal direction, each winding radius positioning plate is provided with multiple rows of winding radius positioning holes in the inner-ring circumferential direction, the damping loading devices are arranged at the two ends of the winding radius positioning plate through the winding radius positioning holes in the horizontal transverse direction, and the winding radius positioning device is arranged on an arc section of the winding radius positioning plate in the circumferential direction through the winding radius positioning holes.

The damping loading device comprises a damping loading pedestal, a damping loading hand wheel, a damping loading lead screw nut, a damping loading lead screw, damping loading clamping bolts, a damping loading support table, main damping loading slide tables, auxiliary damping loading slide tables, damping loading clamping nuts, a two way hydraulic pump, a main hydraulic pump shaft, a hydraulic pump coupling, an auxiliary damping loading shaft, a main damping loading shaft, fixed damping loading wheels, moving damping loading wheels, damping loading liners, a radial damping loading bearing, and a damping loading shaft pedestal; the damping loading support table is arranged on the damping loading pedestal, the damping loading hand wheel, the damping loading lead screw nut, and the damping loading lead screw are arranged coaxially, and the damping loading hand wheel rotates to drive the damping loading lead screw to rotate, thereby pushing the damping loading screw nut to move back and forth; the main damping loading slide table is fixed to the damping loading screw nut, and can slide on the top surface of the damping loading support table in the axial direction; the auxiliary damping loading slide table can slide freely on the top surface of the damping loading support table along the damping loading lead screw in the axial direction; the main damping loading shaft is clamped between two opposite main damping loading slide tables, one end of the main damping loading shaft is connected via the hydraulic pump coupling to the main hydraulic pump shaft of the two-way hydraulic pump, the two-way hydraulic pump is fixed to the main damping loading slide table at one side, the other end of the main damping loading shaft is mounted coaxially with the radial damping loading bearing, the radial damping loading bearing is fixed to the damping loading shaft pedestal, and the damping loading shaft pedestal is fixed to the main damping loading slide table at the other side; the fixed damping loading wheels are mounted serially on the main damping loading shaft and are fixed on the main damping loading shaft, and the number and pitch of the fixed damping loading wheels are equal to the number and pitch of the steel wire ropes of the tested main shaft device respectively; two auxiliary damping loading slide tables are provided, the auxiliary damping loading shaft is clamped between the two opposite auxiliary damping loading slide tables, the two ends of the auxiliary damping loading shaft are fixed to the damping loading shaft pedestal, and the damping loading shaft pedestal is fixed to the auxiliary damping loading slide tables; the moving damping loading wheels are mounted serially on the auxiliary damping loading shaft in the axial direction, and can rotate axially along the auxiliary damping loading shaft, and the number and pitch of the moving damping loading wheels are equal to the number and pitch of the steel wire ropes of tested main shaft device; the fixed damping loading wheels and the moving damping loading wheels are provided with damping loading liners on their outer edges respectively, and each damping loading liner has a rope groove; the main damping loading slide table and the auxiliary damping loading slide table are provided with co linear through-holes in both sides respectively, the damping loading clamping bolts pass through the through-holes from one end to connect the main damping loading slide table and the auxiliary damping loading slide table together, and the damping loading clamping bolts are tightened up at the other end by means of the damping loading clamping nuts, so that the fixed damping loading wheels and the moving damping loading wheels clamp the steel wire ropes under squeezing pressure.

The winding radius positioning device comprises a radius positioning pedestal, a radius positioning hand wheel, a radius positioning lead screw nut, a radius positioning lead screw, a radius positioning support table, main radius positioning slide tables, a radius positioning shaft pedestal, a radius positioning shaft, moving radius positioning wheels, and radius positioning liners; the radius positioning support table is arranged on the radius positioning pedestal, the radius positioning hand wheel, the radius positioning lead screw nut, and the radius positioning lead screw are mounted coaxially, and the radius positioning hand wheel rotates to drive the radius positioning lead screw to rotate, thereby pushing the radius positioning lead screw nut to move back and forth; the main radius positioning slide table is fixed to the radius positioning lead screw nut, and can slide on the top surface of the radius positioning support table in the axial direction; the radius positioning shaft is clamped between the two opposite main radius positioning slide tables, and the two ends of the radius positioning shaft are fixed via the radius positioning shaft pedestal to the main radius positioning slide tables respectively; the moving radius positioning wheels are serially mounted on the radius positioning shaft in the axial direction, and can rotate axially along the radius positioning shaft, and the number and pitch of the moving radius positioning wheels are equal to the number and pitch of the steel wire ropes of the tested main shaft device; the radius positioning liner is arranged on the outer edge of each moving radius positioning wheel, and the radius positioning liner has a rope groove.

The hole density of the winding radius positioning holes in the circumferential direction depends on an arc enclosed by the outer edges of the fixed damping loading wheels and the moving radius positioning wheels, so as to meet the testing requirements of main shaft devices with different diameters.

The number of the plurality of the balancing cylinders is four or six, depending on the specification of the tested main shaft device.

The rope pitch positioning plate is provided with four columns of rope pitch positioning holes at intervals of 200mm, 250mm, 300mm and 350mm in the vertical direction, and is provided with another set of rope pitch positioning holes at the same intervals in the horizontal direction for arranging the positioning fixtures. A testing method utilizing the above-mentioned joint debugging and testing apparatus for endless rope-type vertical shaft hoist, comprises the following steps:

(a) mounting the hydraulic loading pedestal vertically to the two ends of the loading cylinderjacket, mounting hydraulic loading positioning bolts to the two ends of the hydraulic loading pedestal, mounting the rope pitch positioning plate vertically on the top end of the loading cylinder piston rod, fixing one end of the positioning fixtures, the number of which is the same as the number of the steel wire ropes, through the rope pitch positioning holes to the rope pitch positioning plate by means of the positioning pins according to the number and pitch of the steel wire ropes of the tested main shaft device, fixing the balancing cylinderjackets to the other end of the positioning fixtures, mounting the roller clamping plates on the top end of the balancing cylinder piston rods, mounting the loading roller in the middle of the roller clamping plate, mounting the loading liner on the rim of the loading roller, and connecting the pressure-bearing cavities of the balancing cylinders through pipelines, so as to assemble the hydraulic loading device;

(b) mounting the hydraulic loading device on the platform III of the supporting base in a straddling manner in the horizontal transverse direction by the hydraulic loading positioning bolts; mounting the winding radius positioning plates opposite to each other in the horizontal transverse direction on the bottom of the inner side of sandwiched walls of the two sub-bases of the supporting base, wherein the axes of the winding radius positioning plates and the axis of the main shaft device are parallel to each other and in the same vertical plane;

(c) mounting the damping loading support table on the damping loading pedestal, mounting the damping loading hand wheel, the damping loading lead screw nut and the damping loading lead screw coaxially, fixing the main damping loading slide table to the damping loading lead screw nut, mounting the damping loading liners on the outer edges of the fixed damping loading wheels and the moving damping loading wheels, and mounting the fixed damping loading wheels serially on the main damping loading shaft, the number and pitch of the fixed damping loading wheels being equal to the number and pitch of the steel wire ropes of the tested main shaft device; fixing the fixed damping loading wheels to the main damping loading shaft, connecting one end of the main damping loading shaft via the hydraulic pump coupling to the main hydraulic pump shaft of the two-way hydraulic pump, fixing the two-way hydraulic pump to the main damping loading slide table at one side, mounting the other end of the main damping loading shaft coaxially with the radial damping loading bearing, fixing the radial damping loading bearing to the damping loading shaft pedestal, fixing the damping loading shaft pedestal to the main damping loading slide table at the other side, mounting the moving damping loading wheels serially on the auxiliary damping loading shaft in the axial direction, the number and pitch of the moving damping loading wheels being equal to the number and pitch of the steel wire ropes of the tested main shaft device, and the moving damping loading wheels being capable of rotating along the auxiliary damping loading shaft in the axial direction; fixing the two ends of the auxiliary damping loading shaft to the damping loading shaft pedestal, fixing the damping loading shaft pedestal to the auxiliary damping loading slide table, passing the damping loading clamping bolt from one end through the through-holes to connect the main damping loading slide table and the auxiliary damping loading slide table together, and pre-tightening the damping loading clamping bolts at the other end by means of the damping loading clamping nuts, so as to assemble two damping loading devices;

(d) mounting the radius positioning support table on the radius positioning pedestal, mounting the radius positioning hand wheel, the radius positioning lead screw nut and the radius positioning lead screw coaxially, fixing the main radius positioning slide table to the radius positioning lead screw nut, and mounting the radius positioning liners on the outer edges of the moving radius positioning wheels, the number and pitch of the moving radius positioning wheels being equal to the number and pitch of the steel wire ropes of the tested main shaft device; mounting the moving radius positioning wheels serially on the radius positioning shaft in the axial direction, so that the moving radius positioning wheels can rotate along the radius positioning shaft in the axial direction; arranging the radius positioning shaft clamped between two opposite main radius positioning slide tables, and fixing the two ends of the radius positioning shaft to the main radius positioning slide tables via the radius positioning shaft pedestal respectively, so as to assemble several winding radius positioning devices, the number of which depends on the diameter of the tested main shaft device;

(e) mounting the main shaft device of the tested vertical shaft hoist in a straddling manner in the horizontal transverse direction on the platform I of the supporting base, mounting the bearing block in a straddling manner in the horizontal transverse direction on the platform I of the supporting base, mounting the motor, the main shaft and the drum coaxially, mounting the brake disc on the outer edge of the drum, pressing the friction liner on the casing of the drum in the circumferential direction, mounting the brake supporting plates in a straddling manner in the horizontal transverse direction on the platform I of the supporting base and distributing them on the two sides of the main shaft device, mounting the brake along the rim of the brake disc on the brake supporting plate in the circumferential direction, so that the brake can clamp the brake disc when it acts, thereby braking the main shaft device, and mounting the guide wheel of the tested vertical shaft hoist in a straddling manner in the horizontal transverse direction on the platform II of the supporting base;

(f) leading the endless steel wire rope through the drum, the guide wheel and the winding guide loading device sequentially, placing the top part of the endless steel wire rope in the rope grooves of the friction liner of the casing of the drum and the guide wheel, and laying the bottom part of the endless steel wire rope on the periphery of the winding radius positioning plate;

(g) fixing the damping loading device to the two ends of the winding radius positioning plate in the horizontal transverse direction through the winding radius positioning holes, fixing the winding radius positioning device to the arc section of the winding radius positioning plate in the circumferential direction, turning the damping loading hand wheel to drive the damping loading lead screw to rotate according to the diameter D of the drum of the tested vertical shaft hoist, thereby pushing the damping loading leading screw nut to move back and forth, at that point, the main damping loading shaft moves back and forth in the radial direction along the winding radius positioning plate, till the distance from the outer edge of the fixed damping loading wheel to the axle center of the winding radius positioning plate is D; placing the lower part of the endless steel wire rope in the rope groove of the fixed damping loading wheel, turning the radius positioning hand wheel to drive the radius positioning lead screw to rotate, thereby pushing the radius positioning lead screw nut to move back and forth, at that point, the radius positioning shaft moves back and forth in the radial direction along the winding radius positioning plate, till the distance from the outer edge of the moving radius positioning wheel to the axle center of the winding radius positioning plate is D; then placing the lower part of the endless steel wire rope in the rope groove of the moving radius positioning wheel;

(h) adjusting the oil pressure at the oil outlet of the loading cylinder with a low oil pressure, actuating the hydraulic loading device and controlling the loading cylinder piston rod to extend, so that the loading roller presses the endless steel wire rope for pretension; at the point, the endless steel wire rope forms a closed loop via the rope grooves of the friction liner, the guide wheel, the damping loading liner and the radius positioning liner; tightening up the damping loading clamping bolt so that the fixed damping loading wheel and the moving damping loading wheel can hold the endless steel wire rope firmly; at that point, the two way hydraulic pump provides load damping during the transmission of the endless steel wire rope;

(i) setting the vertical distance from the action point of the loading roller to the steel wire rope contact point of the drum to be equal to the vertical distance from the action point of the loading roller to the steel wire rope contact point of the fixed damping loading wheel, adjusting the oil pressure at the oil outlet of the loading cylinder and the oil pressure at the discharge port of the two-way hydraulic pump, so that the loading cylinder acts on the endless steel wire rope with a force F and the two-way hydraulic pump acts on the endless steel wire rope with a torque M; at that point, the angle of the endless steel wire rope from the vertical direction is a; suppose it is expected to simulate the cyclic operation of the endless steel wire rope in the counter-clockwise direction at the moment, the tension forces of the lifting side and lowering side of the endless steel wire rope are as follows:

Flifling F side 2sin(a) F 2M - 2 Flwering F

side 2sin(a) r

where, r is the radius of the main hydraulic pump shaft,

thus, simulating the loads on the light-load side and heavy-load side of the drum, thereby simulating the loads on the two sides of the drum under different operating conditions;

(j) carrying out bearing capacity test of the main shaft device, anti-slip property test of the friction liner, and braking performance test of the brake respectively,

finally, completing the joint debugging and testing of the tested vertical shaft hoist, so as to evaluate the bearing capacity of the main shaft device, the anti-slip property of the friction liner, and the braking performance of the brake reliably.

The bearing capacity test of the main shaft device mainly includes crack detection and strength check, during which the brake clamps the brake disc and the motor is stopped:

firstly, to detect if there is any crack in the main shaft device, acoustic emission sensors are mounted at positions where cracks are prone to occur, including cylindrical shell of the drum, supporting rings, reinforcing ribs, web plates and the riveting point of the main shaft, the stressed states of the drum under zero-load and heavy-load conditions of the main shaft device are simulated; the oil pressure at the oil outlet of the hydraulic loading device and the oil pressure at the discharge port of the two-way hydraulic pump are adjusted, the hydraulic loading device and the two-way hydraulic pump are actuated, so that the endless steel wire ropes are tensioned up, and the tension forces of the endless steel wire ropes are controlled at the same value by the balancing cylinders with communicated bearing cavities; the drum is loaded within the range of the wrap angle by means of the hydraulic loading device in combination with the two-way hydraulic pump; comparative analysis is carried out to determine whether the elastic stress waves at the testing points have any significant change before and after loading, so as to judge whether the main shaft device has any crack at the corresponding positions; secondly, to test whether the strength of the main shaft device meet the requirements, acoustic emission sensors are mounted at positions where elastic deformations are prone to occur, including the cylindrical shell of the drum, web plates, and two ends of the main shaft, the stressed states of the drum under extreme operating conditions of the main shaft device, such as jamming and secondary loading, etc. are simulated; the oil pressure at the oil outlet of the hydraulic loading device and the oil pressure at the discharge port of the two-way hydraulic pump are adjusted, the hydraulic loading device and the two-way hydraulic pump are actuated, so that the endless steel wire ropes are tensioned up, and the tension forces of the endless steel wire ropes are controlled to be the same value by means of the balancing cylinders with communicated bearing cavities; comparative analysis is carried out to determine whether the changes of the elastic stress waves at the testing points before and after loading exceed an allowable threshold, so as to judge whether the elastic deformations of the main shaft device at the corresponding positions are out of limits, thereby judge whether the strength of the main shaft device is qualified or not.

The anti-slip property test of the friction liner mainly includes static friction test and dynamic friction test:

firstly, to carry out static friction test, the brake tightly clamps the brake disc, the motor is stopped, the differences in tension force between the steel wire ropes on two sides of the drum under extremely operating conditions, such as overload and secondary loading, etc., are simulated; the oil pressure at the oil outlet of the hydraulic loading device and the oil pressure at the discharge port of the two-way hydraulic pump are adjusted, the hydraulic loading device and the two-way hydraulic pump are actuated, a micrometric displacement sensor is utilized to determine whether there is any relative slip between the endless steel wire rope and the friction liner, so as to judge whether the friction liner meets the anti-skid requirement in a static state; secondly, to carry out dynamic friction test, the brake tightly clamps the brake disc, the motor is stopped, and the differences in tension force of the steel wire ropes on two sides of the drum under heavy-load operating conditions are simulated; the oil pressure at the oil outlet of the hydraulic loading device and the oil pressure at the discharge port of the two-way hydraulic pump are adjusted, the hydraulic loading device and the two way hydraulic pump are actuated, the motor is started, and the brake is released, so that the motor controls the drum to start at an angular acceleration al and stop at an angular acceleration a2; at that point, a micrometric displacement sensor is utilized to determine whether the creeping slippage amount of the endless steel wire rope with respect to the friction liner at the corresponding angular acceleration is within an allowable range, so as to judge whether the friction liner meets the anti-skid requirement in a dynamic state.

The braking performance test of the brake mainly includes static braking test and dynamic braking test:

firstly, to carry out static braking test, the brake tightly clamps the brake disc, the motor is stopped, and the differences in tension force of the steel wire ropes on two sides of the drum under extreme operating condition are simulated; the oil pressure at the oil outlet of the hydraulic loading device and the oil pressure at the discharge port of the two-way hydraulic pump are adjusted, and the hydraulic loading device and the two way hydraulic pump are actuated; at that point, whether there is any relative slip between the brake and the brake disc is determined, so as to judge whether the brake can effective brake the main shaft device in a static state;

secondly, to carry out dynamic braking test, the brake tightly clamps the brake disc, the motor is stopped, and the differences in tension force of the steel wire rope in the two sides of the drum under heavy-load operating conditions are simulated; the oil pressure at the oil outlet of the hydraulic loading device and the oil pressure at the discharge port of the two-way hydraulic pump are adjusted, the hydraulic loading device and the two way hydraulic pump are actuated, the motor is started, and the brake is released, so that the motor controls the drum to start at an angular acceleration al and reach a speed v; the motor is stopped; the brake is actuated, and whether the idle stroke time and braking deceleration of the brake are within allowable ranges is determined, so as to judge whether the braking system can effectively brake the main shaft device in a dynamic state.

Beneficial effects: with the technical scheme described above, the present invention can reliably evaluate the bearing capacity of the main shaft device, the anti-slip property of the friction liner, and the braking performance of the brake. To meet the urgent demand for a joint debugging and testing apparatus for vertical shaft hoists, the loads on the two sides of the drum are simulated under the principles that a hydraulic cylinder presses the steel wire rope and a two-way hydraulic pump provides load damping; a winding guide loading device based on lead screw driving is utilized to adapt to drums with different diameters, and balancing cylinders with bearing cavities communicating with each other are used to control the tension forces of the plurality of endless steel wire ropes to be the same; besides, rope pitch positioning plates are utilized to adapt to different numbers of steel wire ropes and different pitches of steel wire ropes; thus, the apparatus is applicable to vertical shaft hoists of different specifications; different hoisting distances and hoisting speeds can be well simulated by utilizing endless ropes operating in closed cycles; normal operating conditions such as zero-load, light load and heavy load, as well as extreme operating conditions such as overload and secondary heavy load, can be simulated by utilizing a hydraulic cylinder to press the steel wire ropes and utilizing a two-way hydraulic pump to apply damping; in addition, acoustic emission sensors and micrometric displacement sensors are used in combination, so as to reliably evaluate the bearing capacity of the main shaft device, the anti-slip property of the friction liner and the braking performance of the brake. The apparatus has a simple structure, is highly versatile, can carry out joint debugging and testing for different models of vertical shaft hoists before field installation and carry out full-state loading test for the main shaft device. Therefore, the apparatus is of great significance for ensuring the safety of the vertical shaft hoisting system.

Description of Drawings Fig. 1 is a schematic structural diagram of the apparatus in the present invention;

Fig. 2 is a schematic structural diagram of the hydraulic loading device in the present invention;

Fig. 3 is a schematic diagram of the rope pitch positioning principle of the steel wire rope in the present invention;

Fig. 4 is a schematic structural diagram of the winding guide loading device in the present invention;

Fig. 5 is a schematic structural diagram of the damping loading device in the present invention;

Fig. 6 is a schematic structural diagram of the winding radius positioning device in the present invention;

Fig. 7 is a schematic diagram of the working principle of the apparatus in the present invention.

In the figures: 1 - hydraulic loading device, 1-a - hydraulic loading positioning bolt, 1-b - loading cylinder jacket, 1-c - hydraulic loading pedestal, 1-d - loading cylinder piston rod, 1-e - rope pitch positioning hole, 1-f - rope pitch positioning plate, 1-g - positioning pin, 1-h - positioning fixture, 1-i - balancing cylinder jacket, 1-j - balancing cylinder piston rod, 1-k - roller clamping plate, 1-m - loading roller, 1-n - loading liner (1-n), 2 winding guide loading device, 2-a - damping loading device, 2-a-a - damping loading pedestal, 2-a-b - damping loading hand wheel, 2-a-c - damping loading lead screw nut, 2-a-d - damping loading lead screw, 2-a-e - damping loading clamping bolt, 2-a-f damping loading support table, 2-a-g - main damping loading slide table, 2-a-h auxiliary damping loading slide table, 2-a-i - damping loading clamping nut, 2-a-j two-way hydraulic pump, 2-a-k - main hydraulic pump shaft, 2-a-l - hydraulic pump coupling, 2-a-m - auxiliary damping loading shaft, 2-a-n - main damping loading shaft, 2-a-o - fixed damping loading wheel, 2-a-p - moving damping loading wheel, 2-a-q damping loading liner, 2-a-r - radial damping loading bearing, 2-a-s - damping loading shaft pedestal, 2-b - winding radius positioning device, 2-b-a - radius positioning pedestal, 2-b-b - radius positioning hand wheel, 2-b-c - radius positioning lead screw nut, 2-b-d - radius positioning lead screw, 2-b-e - radius positioning support table, 2-b-f - main radius positioning slide table, 2-b-g - radius positioning shaft pedestal, 2-b-h radius positioning shaft, 2-b-i - moving radius positioning wheel, 2-b-j - radius positioning liner, 2-c - winding radius positioning plate, 2-c-a - winding radius positioning hole, 3 - supporting base, 4 - endless steel wire rope, 5 - brake supporting plate, 6 - brake, 7 - motor, 8 - main shaft, 9 - bearing block, 10 - drum, 11 - brake disc, 12 - friction liner, 13 - guide wheel.

Embodiments Hereunder the present invention will be further detailed with reference to the examples shown in the accompanying drawings.

As shown in Fig. 1, ajoint debugging and testing apparatus for endless rope-type vertical shaft hoist, is mainly composed of a supporting base 3, a hydraulic loading device 1, a winding guide loading device 2, an endless steel wire rope 4, a guide wheel 13 of the tested vertical shaft hoist, and a main shaft device of the tested vertical shaft hoist, which comprises a motor 7, a bearing block 9, a main shaft 8, a drum 10, a brake disc 11, a friction liner 12, a brake supporting plate 5, and a brake 6; the supporting base 3 is composed of two identical sub-bases, which are step-shaped and arranged symmetrically at interval in horizontal transverse direction, and form a platform I, a platform II, and a platform III; the main shaft device of the tested vertical shaft hoist is mounted in a straddling manner in the horizontal transverse direction on the platform I of the supporting base 3, and guide wheel 13 of the tested vertical shaft hoist is mounted in a straddling manner in the horizontal transverse direction on the platform II of the supporting base 3; hydraulic loading device 1 is arranged in a straddling manner in the horizontal transverse direction on the platform III of the supporting base 3; the winding guide loading device 2 is arranged in the horizontal transverse direction on the bottom of the inner side of sandwiched wall between the two sub-bases of the supporting base 3, and the axis of the winding guide loading device 2 and the axis of the main shaft device are parallel to each other and in the same vertical plane.

As shown in Fig. 2, the hydraulic loading device 1 comprises one loading cylinder and a plurality of balancing cylinders, the loading cylinder comprises a loading cylinder jacket 1-b and a loading cylinder piston rod 1-d, hydraulic loading pedestals 1-c are provided in front of and behind the loading cylinder jacket 1-b, and each of the plurality of balancing cylinders comprises a balancing cylinder jacket 1-i and a balancing cylinder piston rod 1-j; the plurality of balancing cylinders are fixed on one side of a rope pitch positioning plate 1-f at intervals by positioning fixtures 1-h respectively, the middle part of the other side of the positioning plate 1-f and the loading cylinder piston rod 1-d are integrally connected, the top end of each balancing cylinder piston rod 1-j is provided with a roller clamping plates 1-k, a loading roller 1-m is provided between the roller clamping plates 1-k, a loading liner 1-n is provided on the rim of the loading roller 1-m, the loading liner 1-n has a rope groove, and the pressure-bearing cavities of all balancing cylinders communicate with each other through pipelines.

As shown in Fig. 3, the rope pitch positioning plate 1-f is provided with four columns of rope pitch positioning holes 1-e at intervals of 200mm, 250mm, 300mm and 350mm in the vertical direction, and is provided with another set of rope pitch positioning holes 1 e at the same intervals in the horizontal direction for arranging the positioning fixtures 1-h; the number of the positioning fixtures 1-h is four or six, depending on the specification of the tested main shaft device.

As shown in Fig. 4, the winding guide loading device 2 comprises damping loading devices 2-a, winding radius positioning devices 2-b, and winding radius positioning plates 2-c; the winding radius positioning plates 2-c are semicircular, two winding radius positioning plates 2-c are arranged opposite to each other in horizontal longitudinal direction, each winding radius positioning plate 2-c is provided with multiple rows of winding radius positioning holes 2-c-a in the inner-ring circumferential direction, the damping loading devices 2-a are arranged at the two ends of the winding radius positioning plate 2-c through the winding radius positioning holes 2-c-a in the horizontal transverse direction, and the winding radius positioning device 2-b is arranged on an arc section of the winding radius positioning plate 2-c in the circumferential direction through the winding radius positioning holes 2-c-a. The hole density of the winding radius positioning holes 2-c-a in the circumferential direction depends on an arc enclosed by the outer edges of the fixed damping loading wheels 2-a o and the moving radius positioning wheels 2-b-i, so as to meet the testing requirements of main shaft devices with different diameters

As shown in Fig. 5, the damping loading device 2-a is comprised of a damping loading pedestal 2-a-a, a damping loading hand wheel 2-a-b, a damping loading lead screw nut 2-a-c, a damping loading lead screw 2-a-d, damping loading clamping bolts 2-a-e, a damping loading support table 2-a-f, main damping loading slide tables 2-a-g, auxiliary damping loading slide tables 2-a-h, damping loading clamping nuts 2-a-i, a two-way hydraulic pump 2-a-j, a main hydraulic pump shaft 2-a-k, a hydraulic pump coupling 2 a-1, an auxiliary damping loading shaft 2-a-m, a main damping loading shaft 2-a-n, fixed damping loading wheels 2-a-o, moving damping loading wheels 2-a-p, damping loading liners 2-a-q, a radial damping loading bearing 2-a-r, and a damping loading shaft pedestal 2-a-s; the damping loading support table 2-a-f is arranged on the damping loading pedestal 2-a-a, the damping loading hand wheel 2-a-b, the damping loading lead screw nut 2-a-c, and the damping loading lead screw 2-a-d are arranged coaxially, and the damping loading hand wheel 2-a-b rotates to drive the damping loading lead screw 2-a-d to rotate, thereby pushing the damping loading screw nut 2-a-c to move back and forth; the main damping loading slide table 2-a-g is fixed to the damping loading screw nut 2-a-c, and can slide on the top surface of the damping loading support table 2-a-f in the axial direction; the auxiliary damping loading slide table 2-a-h can slide freely on the top surface of the damping loading support table 2-a-f along the damping loading lead screw 2-a-d in the axial direction; the main damping loading shaft 2-a-n is clamped between two opposite main damping loading slide tables 2-a-g, one end of the main damping loading shaft 2-a-n is connected via the hydraulic pump coupling 2-a-l to the main hydraulic pump shaft 2-a-k of the two-way hydraulic pump 2-a-j, the two-way hydraulic pump 2-a-j is fixed to the main damping loading slide table 2-a-g at one side, the other end of the main damping loading shaft 2-a-n is mounted coaxially with the radial damping loading bearing 2-a-r, the radial damping loading bearing 2-a-r is fixed to the damping loading shaft pedestal 2-a-s, and the damping loading shaft pedestal 2-a s is fixed to the main damping loading slide table 2-a-g at the other side; the fixed damping loading wheels 2-a-o are mounted serially on the main damping loading shaft 2-a-n and are fixed on the main damping loading shaft 2-a-n, and the number and pitch of the fixed damping loading wheels 2-a-o are equal to the number and pitch of the steel wire ropes of the tested main shaft device respectively; the auxiliary damping loading shaft 2-a-m is clamped between the two opposite auxiliary damping loading slide tables 2-a-h, the two ends of the auxiliary damping loading shaft 2-a-m are fixed to the damping loading shaft pedestal 2-a-s, and the damping loading shaft pedestal 2-a-s is fixed to the auxiliary damping loading slide tables 2-a-h; the moving damping loading wheels 2-a-p are mounted serially on the auxiliary damping loading shaft 2-a-m in the axial direction, and can rotate axially along the auxiliary damping loading shaft 2-a-m, and the number and pitch of the moving damping loading wheels 2-a-p are equal to the number and pitch of the steel wire ropes of tested main shaft device; the fixed damping loading wheels 2-a-0 and the moving damping loading wheels 2-a-p are provided with damping loading liners 2-a-q on their outer edges respectively, and each damping loading liner 2-a-q has a rope groove; the main damping loading slide table 2-a-g and the auxiliary damping loading slide table 2-a-h are provided with co-linear through holes in both sides respectively, the damping loading clamping bolts 2-a-e pass through the through-holes from one end to connect the main damping loading slide table 2-a-g and the auxiliary damping loading slide table 2-a-h together, and the damping loading clamping bolts 2-a-e are tightened up at the other end by means of the damping loading clamping nuts 2-a-i, so that the fixed damping loading wheels 2-a-o and the moving damping loading wheels 2-a-p clamp the steel wire ropes under certain squeezing pressure.

As shown in Fig. 6, the winding radius positioning device 2-b is composed of a radius positioning pedestal 2-b-a, a radius positioning hand wheel 2-b-b, a radius positioning lead screw nut 2-b-c, a radius positioning lead screw 2-b-d, a radius positioning support table 2-b-e, main radius positioning slide tables 2-b-f, a radius positioning shaft pedestal 2-b-g, a radius positioning shaft 2-b-h, moving radius positioning wheels 2-b-i, and radius positioning liners 2-b-j; the radius positioning support table 2-b-e is arranged on the radius positioning pedestal 2-b-a, the radius positioning hand wheel 2-b-b, the radius positioning lead screw nut 2-b-c, and the radius positioning lead screw 2-b-d are mounted coaxially, and the radius positioning hand wheel 2-b-b rotates to drive the radius positioning lead screw 2-b-d to rotate, thereby pushing the radius positioning lead screw nut 2-b-c to move back and forth; the main radius positioning slide table 2-b f is fixed to the radius positioning lead screw nut 2-b-c, and can slide on the top surface of the radius positioning support table 2-b-e in the axial direction; the radius positioning shaft 2-b-h is clamped between the two opposite main radius positioning slide tables 2 b-f, and the two ends of the radius positioning shaft 2-b-h are fixed via the radius positioning shaft pedestal 2-b-g to the main radius positioning slide tables 2-b-f respectively; the moving radius positioning wheels 2-b-i are serially mounted on the radius positioning shaft 2-b-h in the axial direction, and can rotate axially along the radius positioning shaft 2-b-h, and the number and pitch of the moving radius positioning wheels 2-b-i are equal to the number and pitch of the steel wire ropes of the tested main shaft device; the radius positioning liner 2-b-j is arranged on the outer edge of each moving radius positioning wheel 2-b-i, and the radius positioning liner 2-b-j has a rope groove.

Fig. 7 shows a joint debugging and testing method for endless rope-type vertical shaft hoist, comprising the following steps:

(a) mounting the hydraulic loading pedestal 1-c vertically to the two ends of the loading cylinder jacket 1-b, mounting hydraulic loading positioning bolts 1-a to the two ends of the hydraulic loading pedestal 1-c, mounting the rope pitch positioning plate 1-f vertically on the top end of the loading cylinder piston rod 1-d, fixing one end of the positioning fixtures 1-h, the number of which is the same as the number of the steel wire ropes, through the rope pitch positioning holes 1-e to the rope pitch positioning plate 1-f by means of the positioning pins 1-g according to the number and pitch of the steel wire ropes of the tested main shaft device, fixing the balancing cylinder jackets 1-i to the other end of the positioning fixtures 1-h, mounting the roller clamping plates 1-k on the top end of the balancing cylinder piston rods 1-j, mounting the loading roller 1-m in the middle of the roller clamping plate 1-k, mounting the loading liner 1-n on the rim of the loading roller 1-m, and connecting the pressure-bearing cavities of the balancing cylinders through pipelines, so as to assemble the hydraulic loading device 1;

(b) mounting the hydraulic loading device 1 on the platform III of the supporting base 3 in a straddling manner in the horizontal transverse direction by the hydraulic loading positioning bolts 1-a; mounting the winding radius positioning plates 2-c opposite to each other in the horizontal transverse direction on the bottom of the inner side of sandwiched walls of the two sub-bases of the supporting base 3, wherein the axes of the winding radius positioning plates 2-c and the axis of the main shaft device are parallel to each other and in the same vertical plane;

(c) mounting the damping loading support table 2-a-f on the damping loading pedestal 2-a-a, mounting the damping loading hand wheel 2-a-b, the damping loading lead screw nut 2-a-c and the damping loading lead screw 2-a-d coaxially, fixing the main damping loading slide table 2-a-g to the damping loading lead screw nut 2-a c, mounting the damping loading liners 2-a-q on the outer edges of the fixed damping loading wheels 2-a-o and the moving damping loading wheels 2-a-p, and mounting the fixed damping loading wheels 2-a-o serially on the main damping loading shaft 2-a-n, the number and pitch of the fixed damping loading wheels 2-a o being equal to the number and pitch of the steel wire ropes of the tested main shaft device; fixing the fixed damping loading wheels 2-a-o to the main damping loading shaft 2-a-n, connecting one end of the main damping loading shaft 2-a-n via the hydraulic pump coupling 2-a-l to the main hydraulic pump shaft 2-a-k of the two-way hydraulic pump 2-a-j, fixing the two-way hydraulic pump 2-a-j to the main damping loading slide table 2-a-g at one side, mounting the other end of the main damping loading shaft 2-a-n coaxially with the radial damping loading bearing 2-a-r, fixing the radial damping loading bearing 2-a-r to the damping loading shaft pedestal 2-a-s, fixing the damping loading shaft pedestal 2-a-s to the main damping loading slide table 2-a-g at the other side, mounting the moving damping loading wheels 2-a-p serially on the auxiliary damping loading shaft 2-a m in the axial direction, the number and pitch of the moving damping loading wheels 2-a-p being equal to the number and pitch of the steel wire ropes of the tested main shaft device, and the moving damping loading wheels 2-a-p being capable of rotating along the auxiliary damping loading shaft 2-a-m in the axial direction; fixing the two ends of the auxiliary damping loading shaft 2-a-m to the damping loading shaft pedestal 2-a-s, fixing the damping loading shaft pedestal 2 a-s to the auxiliary damping loading slide table 2-a-h, passing the damping loading clamping bolt 2-a-e from one end through the through-holes to connect the main damping loading slide table 2-a-g and the auxiliary damping loading slide table 2 a-h together, and pre-tightening the damping loading clamping bolts 2-a-e at the other end by means of the damping loading clamping nuts 2-a-i, so as to assemble two damping loading devices 2-a;

(d) mounting the radius positioning support table 2-b-e on the radius positioning pedestal 2-b-a, mounting the radius positioning hand wheel 2-b-b, the radius positioning lead screw nut 2-b-c and the radius positioning lead screw 2-b-d coaxially, fixing the main radius positioning slide table 2-b-f to the radius positioning lead screw nut 2-b-c, and mounting the radius positioning liners 2-b-j on the outer edges of the moving radius positioning wheels 2-b-i, the number and pitch of the moving radius positioning wheels 2-b-i being equal to the number and pitch of the steel wire ropes of the tested main shaft device; mounting the moving radius positioning wheels 2-b-i serially on the radius positioning shaft 2-b-h in the axial direction, so that the moving radius positioning wheels 2-b-i can rotate along the radius positioning shaft 2-b-h in the axial direction; arranging the radius positioning shaft 2-b-h clamped between two opposite main radius positioning slide tables 2-b-f, and fixing the two ends of the radius positioning shaft 2-b-h to the main radius positioning slide tables 2-b-f via the radius positioning shaft pedestal 2-b-g respectively, so as to assemble several winding radius positioning devices 2-b, the number of which depends on the diameter of the tested main shaft device;

(e) mounting the main shaft device of the tested vertical shaft hoist in a straddling manner in the horizontal transverse direction on the platform I of the supporting base 3, mounting the bearing block 9 in a straddling manner in the horizontal transverse direction on the platform I of the supporting base 3, mounting the motor 7, the main shaft 8 and the drum 10 coaxially, mounting the brake disc 11 on the outer edge of the drum 10, pressing the friction liner 12 on the casing of the drum 10 in the circumferential direction, mounting the brake supporting plates 5 in a straddling manner in the horizontal transverse direction on the platform I of the supporting base 3 and distributing them on the two sides of the main shaft device, mounting the brake 6 along the rim of the brake disc 11 on the brake supporting plate 5 in the circumferential direction, so that the brake 6 can clamp the brake disc 11 when it acts, thereby braking the main shaft device, and mounting the guide wheel 13 of the tested vertical shaft hoist in a straddling manner in the horizontal transverse direction on the platform II of the supporting base 3;

(f) leading the endless steel wire rope 4 through the drum 10, the guide wheel 13 and the winding guide loading device 2 sequentially, placing the top part of the endless steel wire rope 4 in the rope grooves of the friction liner 12 of the casing of the drum 10 and the guide wheel 13, and laying the bottom part of the endless steel wire rope 4 on the periphery of the winding radius positioning plate 2-c;

(g) fixing the damping loading device 2-a to the two ends of the winding radius positioning plate 2-c in the horizontal transverse direction through the winding radius positioning holes 2-c-a, fixing the winding radius positioning device 2-b to the arc section of the winding radius positioning plate 2-c in the circumferential direction, turning the damping loading hand wheel 2-a-b to drive the damping loading lead screw 2-a-d to rotate according to the diameter D of the drum 10 of the tested vertical shaft hoist, thereby pushing the damping loading leading screw nut 2-a-c to move back and forth, at that point, the main damping loading shaft 2 a-n moves back and forth in the radial direction along the winding radius positioning plate 2-c, till the distance from the outer edge of the fixed damping loading wheel 2-a-o to the axle center of the winding radius positioning plate 2-c is D; placing the lower part of the endless steel wire rope 4 in the rope groove of the fixed damping loading wheel 2-a-o, turning the radius positioning hand wheel 2-b b to drive the radius positioning lead screw 2-b-d to rotate, thereby pushing the radius positioning lead screw nut 2-b-c to move back and forth, at that point, the radius positioning shaft 2-b-h moves back and forth in the radial direction along the winding radius positioning plate 2-c, till the distance from the outer edge of the moving radius positioning wheel 2-b-i to the axle center of the winding radius positioning plate 2-c is D; then placing the lower part of the endless steel wire rope 4 in the rope groove of the moving radius positioning wheel 2-b-i;

(h) adjusting the oil pressure at the oil outlet of the loading cylinder with a low oil pressure, actuating the hydraulic loading device 1 and controlling the loading cylinder piston rod 1-d to extend, so that the loading roller1-m presses the endless steel wire rope 4 for pretension; at the point, the endless steel wire rope 4 forms a closed loop via the rope grooves of the friction liner 12, the guide wheel 13, the damping loading liner 2-a-q and the radius positioning liner 2-b-j; tightening up the damping loading clamping bolt 2-a-e so that the fixed damping loading wheel 2-a o and the moving damping loading wheel 2-a-p can hold the endless steel wire rope 4 firmly; at that point, the two-way hydraulic pump 2-a-j provides load damping during the transmission of the endless steel wire rope 4;

(i) setting the vertical distance from the action point of the loading roller 1-m to the steel wire rope contact point of the drum 10 to be equal to the vertical distance from the action point of the loading roller 1-m to the steel wire rope contact point of the fixed damping loading wheel 2-a-o, adjusting the oil pressure at the oil outlet of the loading cylinder and the oil pressure at the discharge port of the two way hydraulic pump 2-a-j, so that the loading cylinder acts on the endless steel wire rope 4 with a force F and the two-way hydraulic pump acts on the endless steel wire rope 4 with a torque M; at that point, the angle of the endless steel wire rope 4 from the vertical direction is a; suppose it is expected to simulate the cyclic operation of the endless steel wire rope 4 in the counter-clockwise direction at the moment, the tension forces of the lifting side and lowering side of the endless steel wire rope 4 are as follows:

Flifling F side 2sin(a) F 2M - 2 Flwering F

side 2sin(a) r

where, r is the radius of the main hydraulic pump shaft (2-a-k),

simulating the loads on the light-load side and heavy-load side of the drum 10, thereby simulating the loads on the two sides of the drum 10 under different operating conditions;

completing the joint debugging and testing of the tested vertical shaft hoist, so as to evaluate the bearing capacity of the main shaft device, the anti-slip property of the friction liner, and the braking performance of the brake reliably.

The bearing capacity test of the main shaft device mainly includes crack detection and strength check, during which the brake 6 clamps the brake disc 11 and the motor 7 is stopped: firstly, to detect if there is any crack in the main shaft device, acoustic emission sensors are mounted at positions where cracks are prone to occur, including cylindrical shell of the drum 10, supporting rings, reinforcing ribs, web plates and the riveting point of the main shaft 8, the stressed states of the drum 10 under zero-load and heavy-load conditions of the main shaft device are simulated; the oil pressure at the oil outlet of the hydraulic loading device 1 and the oil pressure at the discharge port of the two-way hydraulic pump 2-a-j are adjusted, the hydraulic loading device 1 and the two-way hydraulic pump 2-a-j are actuated, so that the endless steel wire ropes 4 are tensioned up, and the tension forces of the endless steel wire ropes 4 are controlled at the same value by the balancing cylinders with communicated bearing cavities; the drum 10 is loaded within the range of the wrap angle by means of the hydraulic loading device 1 in combination with the two-way hydraulic pump 2-a-j; comparative analysis is carried out to determine whether the elastic stress waves at the testing points have any significant change before and after loading, so as to judge whether the main shaft device has any crack at the corresponding positions; secondly, to test whether the strength of the main shaft device meet the requirements, acoustic emission sensors are mounted at positions where elastic deformations are prone to occur, including the cylindrical shell of the drum 10, web plates, and two ends of the main shaft 8, the stressed states of the drum 10 under extreme operating conditions of the main shaft device, such as jamming and secondary loading, etc. are simulated; the oil pressure at the oil outlet of the hydraulic loading device 1 and the oil pressure at the discharge port of the two-way hydraulic pump 2-a-j are adjusted, the hydraulic loading device 1 and the two-way hydraulic pump 2-a-j are actuated, so that the endless steel wire ropes 4 are tensioned up, and the tension forces of the endless steel wire ropes 4 are controlled to be the same value by means of the balancing cylinders with communicated bearing cavities; comparative analysis is carried out to determine whether the changes of the elastic stress waves at the testing points before and after loading exceed an allowable threshold, so as to judge whether the elastic deformations of the main shaft device at the corresponding positions are out of limits, thereby judge whether the strength of the main shaft device is qualified or not;

(k) The anti-slip property test of the friction liner mainly includes static friction test and dynamic friction test: firstly, to carry out static friction test, the brake 6 tightly clamps the brake disc 11, the motor 7 is stopped, the differences in tension force between the steel wire ropes on two sides of the drum 10 under extremely operating conditions, such as overload and secondary loading, etc., are simulated; the oil pressure at the oil outlet of the hydraulic loading device 1 and the oil pressure at the discharge port of the two-way hydraulic pump 2-a-j are adjusted, the hydraulic loading device 1 and the two-way hydraulic pump 2-a-j are actuated, a micrometric displacement sensor is utilized to determine whether there is any relative slip between the endless steel wire rope 4 and the friction liner 12, so as to judge whether the friction liner meets the anti-skid requirement in a static state; secondly, to carry out dynamic friction test, the brake 6 tightly clamps the brake disc 11, the motor 7 is stopped, and the differences in tension force of the steel wire ropes on two sides of the drum 10 under heavy-load operating conditions are simulated; the oil pressure at the oil outlet of the hydraulic loading device 1 and the oil pressure at the discharge port of the two-way hydraulic pump 2-a-j are adjusted, the hydraulic loading device 1 and the two-way hydraulic pump 2-a-j are actuated, the motor 7 is started, and the brake 6 is released, so that the motor 7 controls the drum 10 to start at an angular acceleration al and stop at an angular acceleration a2; at that point, a micrometric displacement sensor is utilized to determine whether the creeping slippage amount of the endless steel wire rope 4 with respect to the friction liner 12 at the corresponding angular acceleration is within an allowable range, so as to judge whether the friction liner 12 meets the anti-skid requirement in a dynamic state.

(1) The braking performance test of the brake mainly includes static braking test and dynamic braking test: firstly, to carry out static braking test, the brake 6 tightly clamps the brake disc 11, the motor 7 is stopped, and the differences in tension force of the steel wire ropes on two sides of the drum 10 under extreme operating condition are simulated; the oil pressure at the oil outlet of the hydraulic loading device 1 and the oil pressure at the discharge port of the two-way hydraulic pump 2-a-j are adjusted, and the hydraulic loading device 1 and the two-way hydraulic pump 2-a-j are actuated; at that point, whether there is any relative slip between the brake 6 and the brake disc 11 is determined, so as to judge whether the brake 6 can effective brake the main shaft device in a static state;

secondly, to carry out dynamic braking test, the brake 6 tightly clamps the brake disc 11, the motor 7 is stopped, and the differences in tension force of the steel wire rope in the two sides of the drum 10 under heavy-load operating conditions are simulated; the oil pressure at the oil outlet of the hydraulic loading device 1 and the oil pressure at the discharge port of the two-way hydraulic pump 2-a-j are adjusted, the hydraulic loading device 1 and the two-way hydraulic pump 2-a-j are actuated, the motor 7 is started, and the brake 6 is released, so that the motor 7 controls the drum 10 to start at an angular acceleration al and reach a speed v; the motor 7 is stopped; the brake 6 is actuated, and whether the idle stroke time and braking deceleration of the brake are within allowable ranges is determined, so as to judge whether the braking system can effectively brake the main shaft device in a dynamic state.

(m) finally, completing the joint debugging and testing of the tested vertical shaft hoist, so as to evaluate the bearing capacity of the main shaft device, the anti-slip property of the friction liner, and the braking performance of the brake reliably.

Claims

CLAIMS:

1. A joint debugging and testing apparatus for endless rope-type vertical shaft hoist, comprising a guide wheel (13) of a tested vertical shaft hoist, and a main shaft device of the tested vertical shaft hoist, said main shaft device consisting of a motor (7), a bearing block (9), a main shaft (8), a drum (10), a brake disc (11), a friction liner (12), a brake supporting plate (5), and a brake (6); wherein thejoint debugging and testing apparatus further comprises a supporting base (3), a hydraulic loading device (1), a winding guide loading device (2), and an endless steel wire rope (4), the supporting base (3) is composed of two identical sub-bases, which are step-shaped and arranged symmetrically at interval in horizontal transverse direction, and form a platform I, a platform II, and a platform III; the main shaft device of the tested vertical shaft hoist is mounted in a straddling manner in the horizontal transverse direction on the platform I of the supporting base (3), and guide wheel (13) of the tested vertical shaft hoist is mounted in a straddling manner in the horizontal transverse direction on the platform II of the supporting base (3); hydraulic loading device (1) is arranged in a straddling manner in the horizontal transverse direction on the platform III of the supporting base (3); the winding guide loading device (2) is arranged in the horizontal transverse direction on the bottom of the inner side of sandwiched wall between the two sub-bases of the supporting base (3), and the axis of the winding guide loading device (2) and the axis of the main shaft device are parallel to each other and in the same vertical plane;

the hydraulic loading device (1) comprises one loading cylinder and a plurality of balancing cylinders, the loading cylinder comprises a loading cylinderjacket (1-b) and a loading cylinder piston rod (1-d), hydraulic loading pedestals (1-c) are provided in front of and behind the loading cylinderjacket (1-b), and each of the plurality of balancing cylinders comprises a balancing cylinder jacket (1-i) and a balancing cylinder piston rod (1-j); the plurality of balancing cylinders are fixed on one side of a rope pitch positioning plate (1-f) at intervals by positioning fixtures (1-h) respectively, the middle part of the other side of the positioning plate (1-f) and the loading cylinder piston rod (1-d) are integrally connected, the top end of each balancing cylinder piston rod (1-j) is provided with a roller clamping plates (1-k), a loading roller (1-m) is provided between the roller clamping plates (1-k), a loading liner (1-n) is provided on the rim of the loading roller (1-m), the loading liner (1-n) has a rope groove, and the pressure-bearing cavities of all balancing cylinders communicate with each other through pipelines; the winding guide loading device (2) comprises damping loading devices (2-a), winding radius positioning devices (2-b), and winding radius positioning plates (2 c); the winding radius positioning plates (2-c) are semicircular, two winding radius positioning plates (2-c) are arranged opposite to each other in horizontal longitudinal direction, each winding radius positioning plate (2-c) is provided with multiple rows of winding radius positioning holes (2-c-a) in the inner-ring circumferential direction, the damping loading devices (2-a) are arranged at the two ends of the winding radius positioning plate (2-c) through the winding radius positioning holes (2-c-a) in the horizontal transverse direction, and the winding radius positioning device (2-b) is arranged on an arc section of the winding radius positioning plate (2-c) in the circumferential direction through the winding radius positioning holes (2-c-a).

2. The joint debugging and testing apparatus for endless rope-type vertical shaft hoist according to claim 1, wherein the damping loading device (2-a) comprises a damping loading pedestal (2-a-a), a damping loading hand wheel (2-a-b), a damping loading lead screw nut (2-a-c), a damping loading lead screw (2-a-d), damping loading clamping bolts (2-a-e), a damping loading support table (2-a-f), main damping loading slide tables (2-a-g), auxiliary damping loading slide tables (2-a-h), damping loading clamping nuts (2-a-i), a two-way hydraulic pump (2-a-j), a main hydraulic pump shaft (2-a-k), a hydraulic pump coupling (2-a-l), an auxiliary damping loading shaft (2-a-m), a main damping loading shaft (2-a-n), fixed damping loading wheels (2-a-o), moving damping loading wheels (2-a-p), damping loading liners (2-a-q), a radial damping loading bearing (2-a-r), and a damping loading shaft pedestal (2-a-s); the damping loading support table (2-a-f) is arranged on the damping loading pedestal (2-a-a), the damping loading hand wheel (2-a-b), the damping loading lead screw nut (2-a-c), and the damping loading lead screw (2-a-d) are arranged coaxially, and the damping loading hand wheel (2-a-b) rotates to drive the damping loading lead screw (2-a-d) to rotate, thereby pushing the damping loading screw nut (2-a-c) to move back and forth; the main damping loading slide table (2-a-g) is fixed to the damping loading screw nut (2-a-c), and can slide on the top surface of the damping loading support table (2-a-f) in the axial direction; the auxiliary damping loading slide table (2-a-h) can slide freely on the top surface of the damping loading support table (2-a-f) along the damping loading lead screw (2-a-d) in the axial direction; the main damping loading shaft (2-a-n) is clamped between two opposite main damping loading slide tables (2-a g), one end of the main damping loading shaft (2-a-n) is connected via the hydraulic pump coupling (2-a-l) to the main hydraulic pump shaft (2-a-k) of the two-way hydraulic pump (2-a-j), the two-way hydraulic pump (2-a-j) is fixed to the main damping loading slide table (2-a-g) at one side, the other end of the main damping loading shaft (2-a-n) is mounted coaxially with the radial damping loading bearing (2-a-r), the radial damping loading bearing (2-a-r) is fixed to the damping loading shaft pedestal (2-a-s), and the damping loading shaft pedestal (2 a-s) is fixed to the main damping loading slide table (2-a-g) at the other side; the fixed damping loading wheels (2-a-o) are mounted serially on the main damping loading shaft (2-a-n) and are fixed on the main damping loading shaft (2-a-n), and the number and pitch of the fixed damping loading wheels (2-a-o) are equal to the number and pitch of the steel wire ropes of the tested main shaft device respectively; two auxiliary damping loading slide tables (2-a-h) are provided, the auxiliary damping loading shaft (2-a-m) is clamped between the two opposite auxiliary damping loading slide tables (2-a-h), the two ends of the auxiliary damping loading shaft (2-a-m) are fixed to the damping loading shaft pedestal (2 a-s), and the damping loading shaft pedestal (2-a-s) is fixed to the auxiliary damping loading slide tables (2-a-h); the moving damping loading wheels (2-a-p) are mounted serially on the auxiliary damping loading shaft (2-a-m) in the axial direction, and can rotate axially along the auxiliary damping loading shaft (2-a-m), and the number and pitch of the moving damping loading wheels (2-a-p) are equal to the number and pitch of the steel wire ropes of tested main shaft device; the fixed damping loading wheels (2-a-0) and the moving damping loading wheels (2 a-p) are provided with damping loading liners (2-a-q) on their outer edges respectively, and each damping loading liner (2-a-q) has a rope groove; the main damping loading slide table (2-a-g) and the auxiliary damping loading slide table (2-a-h) are provided with co-linear through-holes in both sides respectively, the damping loading clamping bolts (2-a-e) pass through the through-holes from one end to connect the main damping loading slide table (2-a-g) and the auxiliary damping loading slide table (2-a-h) together, and the damping loading clamping bolts (2-a-e) are tightened up at the other end by means of the damping loading clamping nuts (2-a-i), so that the fixed damping loading wheels (2-a-o) and the moving damping loading wheels (2-a-p) clamp the steel wire ropes under squeezing pressure.

3. The joint debugging and testing apparatus for endless rope-type vertical shaft hoist according to claim 1, wherein the winding radius positioning device (2-b) comprises a radius positioning pedestal (2-b-a), a radius positioning hand wheel (2 b-b), a radius positioning lead screw nut (2-b-c), a radius positioning lead screw (2-b-d), a radius positioning support table (2-b-e), main radius positioning slide tables (2-b-f), a radius positioning shaft pedestal (2-b-g), a radius positioning shaft (2-b-h), moving radius positioning wheels (2-b-i), and radius positioning liners (2 b-j); the radius positioning support table (2-b-e) is arranged on the radius positioning pedestal (2-b-a), the radius positioning hand wheel (2-b-b), the radius positioning lead screw nut (2-b-c), and the radius positioning lead screw (2-b-d) are mounted coaxially, and the radius positioning hand wheel (2-b-b) rotates to drive the radius positioning lead screw (2-b-d) to rotate, thereby pushing the radius positioning lead screw nut (2-b-c) to move back and forth; the main radius positioning slide table (2-b-f) is fixed to the radius positioning lead screw nut (2-b c), and can slide on the top surface of the radius positioning support table (2-b-e) in the axial direction; the radius positioning shaft (2-b-h) is clamped between the two opposite main radius positioning slide tables (2-b-f), and the two ends of the radius positioning shaft (2-b-h) are fixed via the radius positioning shaft pedestal (2-b-g) to the main radius positioning slide tables (2-b-f) respectively; the moving radius positioning wheels (2-b-i) are serially mounted on the radius positioning shaft (2 b-h) in the axial direction, and can rotate axially along the radius positioning shaft (2-b-h), and the number and pitch of the moving radius positioning wheels (2-b-i) are equal to the number and pitch of the steel wire ropes of the tested main shaft device; the radius positioning liner (2-b-j) is arranged on the outer edge of each moving radius positioning wheel (2-b-i), and the radius positioning liner (2-b-j) has a rope groove.

4. The joint debugging and testing apparatus for endless rope-type vertical shaft hoist according to claim 1, wherein the hole density of the winding radius positioning holes (2-c-a) in the circumferential direction depends on an arc enclosed by the outer edges of the fixed damping loading wheels (2-a-o) and the moving radius positioning wheels (2-b-i), so as to meet the testing requirements of main shaft devices with different diameters.

5. The joint debugging and testing apparatus for endless rope-type vertical shaft hoist according to claim 1, wherein the number of the plurality of the balancing cylinders is four or six, depending on the specification of the tested main shaft device.

6. The joint debugging and testing apparatus for endless rope-type vertical shaft hoist according to claim 1, wherein the rope pitch positioning plate (1-f) is provided with four columns of rope pitch positioning holes (1-e) at intervals of 200mm, 250mm, 300mm and 350mm in the vertical direction, and is provided with another set of rope pitch positioning holes (1-e) at the same intervals in the horizontal direction for arranging the positioning fixtures (1-h).

7. A testing method utilizing the joint debugging and testing apparatus for endless rope-type vertical shaft hoist according to claim 1, 2 or 3, comprising the following steps:

(a) mounting the hydraulic loading pedestal (1-c) vertically to the two ends of the loading cylinder jacket (1-b), mounting hydraulic loading positioning bolts (1-a) to the two ends of the hydraulic loading pedestal (1-c), mounting the rope pitch positioning plate (1-f) vertically on the top end of the loading cylinder piston rod (1-d), fixing one end of the positioning fixtures (1-h), the number of which is the same as the number of the steel wire ropes, through the rope pitch positioning holes (1-e) to the rope pitch positioning plate (1-f) by means of the positioning pins (1-g) according to the number and pitch of the steel wire ropes of the tested main shaft device, fixing the balancing cylinder jackets (1-i) to the other end of the positioning fixtures (1-h), mounting the roller clamping plates (1-k) on the top end of the balancing cylinder piston rods (1-j), mounting the loading roller (1-m) in the middle of the roller clamping plate (1-k), mounting the loading liner (1-n) on the rim of the loading roller (1-m), and connecting the pressure-bearing cavities of the balancing cylinders through pipelines, so as to assemble the hydraulic loading device (1);

(b) mounting the hydraulic loading device (1) on the platform III of the supporting base (3) in a straddling manner in the horizontal transverse direction by the hydraulic loading positioning bolts (1-a); mounting the winding radius positioning plates (2-c) opposite to each other in the horizontal transverse direction on the bottom of the inner side of sandwiched walls of the two sub-bases of the supporting base (3), wherein the axes of the winding radius positioning plates (2-c) and the axis of the main shaft device are parallel to each other and in the same vertical plane;

(c) mounting the damping loading support table (2-a-f) on the damping loading pedestal (2-a-a), mounting the damping loading hand wheel (2-a-b), the damping loading lead screw nut (2-a-c) and the damping loading lead screw (2-a-d) coaxially, fixing the main damping loading slide table (2-a-g) to the damping loading lead screw nut (2-a-c), mounting the damping loading liners (2-a-q) on the outer edges of the fixed damping loading wheels (2-a-o) and the moving damping loading wheels (2-a-p), and mounting the fixed damping loading wheels (2-a-o) serially on the main damping loading shaft (2-a-n), the number and pitch of the fixed damping loading wheels (2-a-o) being equal to the number and pitch of the steel wire ropes of the tested main shaft device; fixing the fixed damping loading wheels (2-a-o) to the main damping loading shaft (2-a-n), connecting one end of the main damping loading shaft (2-a-n) via the hydraulic pump coupling (2-a-l) to the main hydraulic pump shaft (2-a-k) of the two-way hydraulic pump (2-a-j), fixing the two-way hydraulic pump (2-a-j) to the main damping loading slide table (2-a-g) at one side, mounting the other end of the main damping loading shaft (2-a n) coaxially with the radial damping loading bearing (2-a-r), fixing the radial damping loading bearing (2-a-r) to the damping loading shaft pedestal (2-a-s), fixing the damping loading shaft pedestal (2-a-s) to the main damping loading slide table (2-a-g) at the other side, mounting the moving damping loading wheels (2-a p) serially on the auxiliary damping loading shaft (2-a-m) in the axial direction, the number and pitch of the moving damping loading wheels (2-a-p) being equal to the number and pitch of the steel wire ropes of the tested main shaft device, and the moving damping loading wheels (2-a-p) being capable of rotating along the auxiliary damping loading shaft (2-a-m) in the axial direction; fixing the two ends of the auxiliary damping loading shaft (2-a-m) to the damping loading shaft pedestal (2-a-s), fixing the damping loading shaft pedestal (2-a-s) to the auxiliary damping loading slide table (2-a-h), passing the damping loading clamping bolt (2 a-e) from one end through the through-holes to connect the main damping loading slide table (2-a-g) and the auxiliary damping loading slide table (2-a-h) together, and pre-tightening the damping loading clamping bolts (2-a-e) at the other end by means of the damping loading clamping nuts (2-a-i), so as to assemble two damping loading devices (2-a);

(d) mounting the radius positioning support table (2-b-e) on the radius positioning pedestal (2-b-a), mounting the radius positioning hand wheel (2-b-b), the radius positioning lead screw nut (2-b-c) and the radius positioning lead screw (2-b-d) coaxially, fixing the main radius positioning slide table (2-b-f) to the radius positioning lead screw nut (2-b-c), and mounting the radius positioning liners (2-b j) on the outer edges of the moving radius positioning wheels (2-b-i), the number and pitch of the moving radius positioning wheels (2-b-i) being equal to the number and pitch of the steel wire ropes of the tested main shaft device; mounting the moving radius positioning wheels (2-b-i) serially on the radius positioning shaft (2-b-h) in the axial direction, so that the moving radius positioning wheels (2 b-i) can rotate along the radius positioning shaft (2-b-h) in the axial direction; arranging the radius positioning shaft (2-b-h) clamped between two opposite main radius positioning slide tables (2-b-f), and fixing the two ends of the radius positioning shaft (2-b-h) to the main radius positioning slide tables (2-b-f) via the radius positioning shaft pedestal (2-b-g) respectively, so as to assemble several winding radius positioning devices (2-b), the number of which depends on the diameter of the tested main shaft device;

(e) mounting the main shaft device of the tested vertical shaft hoist in a straddling manner in the horizontal transverse direction on the platform I of the supporting base (3), mounting the bearing block (9) in a straddling manner in the horizontal transverse direction on the platform I of the supporting base (3), mounting the motor (7), the main shaft (8) and the drum (10) coaxially, mounting the brake disc (11) on the outer edge of the drum (10), pressing the friction liner (12) on the casing of the drum (10) in the circumferential direction, mounting the brake supporting plates (5) in a straddling manner in the horizontal transverse direction on the platform I of the supporting base (3) and distributing them on the two sides of the main shaft device, mounting the brake (6) along the rim of the brake disc (11) on the brake supporting plate (5) in the circumferential direction, so that the brake (6) can clamp the brake disc (11) when it acts, thereby braking the main shaft device, and mounting the guide wheel (13) of the tested vertical shaft hoist in a straddling manner in the horizontal transverse direction on the platform II of the supporting base (3);

(f) leading the endless steel wire rope (4) through the drum (10), the guide wheel (13) and the winding guide loading device (2) sequentially, placing the top part of the endless steel wire rope (4) in the rope grooves of the friction liner (12) of the casing of the drum (10) and the guide wheel (13), and laying the bottom part of the endless steel wire rope (4) on the periphery of the winding radius positioning plate (2-c);

(g) fixing the damping loading device (2-a) to the two ends of the winding radius positioning plate (2-c) in the horizontal transverse direction through the winding radius positioning holes (2-c-a), fixing the winding radius positioning device (2-b) to the arc section of the winding radius positioning plate (2-c) in the circumferential direction, turning the damping loading hand wheel (2-a-b) to drive the damping loading lead screw (2-a-d) to rotate according to the diameter D of the drum (10) of the tested vertical shaft hoist, thereby pushing the damping loading leading screw nut (2-a-c) to move back and forth, at that point, the main damping loading shaft (2-a-n) moves back and forth in the radial direction along the winding radius positioning plate (2-c), till the distance from the outer edge of the fixed damping loading wheel (2-a-o) to the axle center of the winding radius positioning plate (2-c) is D; placing the lower part of the endless steel wire rope (4) in the rope groove of the fixed damping loading wheel (2-a-o), turning the radius positioning hand wheel (2-b-b) to drive the radius positioning lead screw (2-b-d) to rotate, thereby pushing the radius positioning lead screw nut (2-b-c) to move back and forth, at that point, the radius positioning shaft (2-b-h) moves back and forth in the radial direction along the winding radius positioning plate (2-c), till the distance from the outer edge of the moving radius positioning wheel (2-b-i) to the axle center of the winding radius positioning plate (2-c) is D; then placing the lower part of the endless steel wire rope (4) in the rope groove of the moving radius positioning wheel (2-b-i);

(h) adjusting the oil pressure at the oil outlet of the loading cylinder with a low oil pressure, actuating the hydraulic loading device (1) and controlling the loading cylinder piston rod (1-d) to extend, so that the loading roller (1-m) presses the endless steel wire rope (4) for pretension; at the point, the endless steel wire rope (4) forms a closed loop via the rope grooves of the friction liner (12), the guide wheel (13), the damping loading liner (2-a-q) and the radius positioning liner (2-b j); tightening up the damping loading clamping bolt (2-a-e) so that the fixed damping loading wheel (2-a-o) and the moving damping loading wheel (2-a-p) can hold the endless steel wire rope (4) firmly; at that point, the two-way hydraulic pump (2-a-j) provides load damping during the transmission of the endless steel wire rope (4);

(i) setting the vertical distance from the action point of the loading roller (1-m) to the steel wire rope contact point of the drum (10) to be equal to the vertical distance from the action point of the loading roller (1-m) to the steel wire rope contact point of the fixed damping loading wheel (2-a-o), adjusting the oil pressure at the oil outlet of the loading cylinder and the oil pressure at the discharge port of the two way hydraulic pump (2-a-j), so that the loading cylinder acts on the endless steel wire rope (4) with a force F and the two-way hydraulic pump acts on the endless steel wire rope (4) with a torque M; at that point, the angle of the endless steel wire rope (4) from the vertical direction is a; suppose it is expected to simulate the cyclic operation of the endless steel wire rope (4) in the counter-clockwise direction at the moment, the tension forces of the lifting side and lowering side of the endless steel wire rope (4) are as follows:

Flifing F

{Iowern side 2sin(a) F F 2M F -2M side 2sin(a) r

where, r is the radius of the main hydraulic pump shaft (2-a-k),

thus, simulating the loads on the light-load side and heavy-load side of the drum (10), thereby simulating the loads on the two sides of the drum (10) under different operating conditions;

8. The joint debugging and testing method for endless rope-type vertical shaft hoist according to claim 7, wherein the bearing capacity test of the main shaft device mainly includes crack detection and strength check, during which the brake (6) clamps the brake disc (11) and the motor (7) is stopped:

firstly, to detect if there is any crack in the main shaft device, acoustic emission sensors are mounted at positions where cracks are prone to occur, including cylindrical shell of the drum (10), supporting rings, reinforcing ribs, web plates and the riveting point of the main shaft (8), the stressed states of the drum (10) under zero-load and heavy-load conditions of the main shaft device are simulated; the oil pressure at the oil outlet of the hydraulic loading device (1) and the oil pressure at the discharge port of the two-way hydraulic pump (2-a-j) are adjusted, the hydraulic loading device (1) and the two-way hydraulic pump (2-a-j) are actuated, so that the endless steel wire ropes (4) are tensioned up, and the tension forces of the endless steel wire ropes (4) are controlled at the same value by the balancing cylinders with communicated bearing cavities; the drum (10) is loaded within the range of the wrap angle by means of the hydraulic loading device (1) in combination with the two-way hydraulic pump (2-a-j); comparative analysis is carried out to determine whether the elastic stress waves at the testing points have any significant change before and after loading, so as to judge whether the main shaft device has any crack at the corresponding positions; secondly, to test whether the strength of the main shaft device meet the requirements, acoustic emission sensors are mounted at positions where elastic deformations are prone to occur, including the cylindrical shell of the drum (10), web plates, and two ends of the main shaft (8), the stressed states of the drum (10) under extreme operating conditions of the main shaft device, such as jamming and secondary loading, etc. are simulated; the oil pressure at the oil outlet of the hydraulic loading device (1) and the oil pressure at the discharge port of the two way hydraulic pump (2-a-j) are adjusted, the hydraulic loading device (1) and the two-way hydraulic pump (2-a-j) are actuated, so that the endless steel wire ropes (4) are tensioned up, and the tension forces of the endless steel wire ropes (4) are controlled to be the same value by means of the balancing cylinders with communicated bearing cavities; comparative analysis is carried out to determine whether the changes of the elastic stress waves at the testing points before and after loading exceed an allowable threshold, so as to judge whether the elastic deformations of the main shaft device at the corresponding positions are out of limits, thereby judge whether the strength of the main shaft device is qualified or not.

9. The joint debugging and testing method for endless rope-type vertical shaft hoist according to claim 7, wherein the anti-slip property test of the friction liner mainly includes static friction test and dynamic friction test:

firstly, to carry out static friction test, the brake (6) tightly clamps the brake disc (11), the motor (7) is stopped, the differences in tension force between the steel wire ropes on two sides of the drum (10) under extremely operating conditions, such as overload and secondary loading, etc., are simulated; the oil pressure at the oil outlet of the hydraulic loading device (1) and the oil pressure at the discharge port of the two-way hydraulic pump (2-a-j) are adjusted, the hydraulic loading device (1) and the two-way hydraulic pump (2-a-j) are actuated, a micrometric displacement sensor is utilized to determine whether there is any relative slip between the endless steel wire rope (4) and the friction liner (12), so as to judge whether the friction liner meets the anti-skid requirement in a static state; secondly, to carry out dynamic friction test, the brake (6) tightly clamps the brake disc (11), the motor (7) is stopped, and the differences in tension force of the steel wire ropes on two sides of the drum (10) under heavy-load operating conditions are simulated; the oil pressure at the oil outlet of the hydraulic loading device (1) and the oil pressure at the discharge port of the two-way hydraulic pump (2-a-j) are adjusted, the hydraulic loading device (1) and the two-way hydraulic pump (2-a-j) are actuated, the motor (7) is started, and the brake (6) is released, so that the motor (7) controls the drum (10) to start at an angular acceleration al and stop at an angular acceleration a2; at that point, a micrometric displacement sensor is utilized to determine whether the creeping slippage amount of the endless steel wire rope (4) with respect to the friction liner (12) at the corresponding angular acceleration is within an allowable range, so as to judge whether the friction liner (12) meets the anti-skid requirement in a dynamic state.

10. The joint debugging and testing method for endless rope-type vertical shaft hoist according to claim 7, wherein the braking performance test of the brake mainly includes static braking test and dynamic braking test:

firstly, to carry out static braking test, the brake (6) tightly clamps the brake disc (11), the motor (7) is stopped, and the differences in tension force of the steel wire ropes on two sides of the drum (10) under extreme operating condition are simulated; the oil pressure at the oil outlet of the hydraulic loading device (1) and the oil pressure at the discharge port of the two-way hydraulic pump (2-a-j) are adjusted, and the hydraulic loading device (1) and the two-way hydraulic pump (2 a-j) are actuated; at that point, whether there is any relative slip between the brake (6) and the brake disc (11) is determined, so as to judge whether the brake (6) can effective brake the main shaft device in a static state;

secondly, to carry out dynamic braking test, the brake (6) tightly clamps the brake disc (11), the motor (7) is stopped, and the differences in tension force of the steel wire rope in the two sides of the drum (10) under heavy-load operating conditions are simulated; the oil pressure at the oil outlet of the hydraulic loading device (1) and the oil pressure at the discharge port of the two-way hydraulic pump (2-a-j) are adjusted, the hydraulic loading device (1) and the two-way hydraulic pump (2-a-j) are actuated, the motor (7) is started, and the brake (6) is released, so that the motor (7) controls the drum (10) to start at an angular acceleration al and reach a speed v; the motor (7) is stopped; the brake (6) is actuated, and whether the idle stroke time and braking deceleration of the brake are within allowable ranges is determined, so as to judge whether the braking system can effectively brake the main shaft device in a dynamic state.