AU2019356608B2 - Pulley block type vertical well hoisting joint-test device and method - Google Patents
Pulley block type vertical well hoisting joint-test device and method Download PDFInfo
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- AU2019356608B2 AU2019356608B2 AU2019356608A AU2019356608A AU2019356608B2 AU 2019356608 B2 AU2019356608 B2 AU 2019356608B2 AU 2019356608 A AU2019356608 A AU 2019356608A AU 2019356608 A AU2019356608 A AU 2019356608A AU 2019356608 B2 AU2019356608 B2 AU 2019356608B2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
Abstract
A pulley block type vertical well hoisting joint-test device, consisting of a support base (14), pulley block loading devices (1), pulley ropes (2), and rope pitch positioning devices (3). The pulley block loading devices (1) are arranged on an III platform of the support base (14) symmetrically along a horizontal longitudinal direction. One end of each pulley rope is fixed on the pulley block loading device (1), and the pulley rope rolls through a pulley block and then is fixed to the rope pitch positioning device (3). Loads at two sides of a reel are simulated on the basis of the principles of driving the steel ropes (4) by the pulley block and driving the pulley block by a hydraulic cylinder. By means of parallel driving of multiple pulley ropes (2), the load demand on the pulley ropes (2) is reduced; use of wrap angle positioning wheels (1-i) can adapt to main shaft devices with different reel diameters and wrap angles; use of a rope pitch positioning plate (3-b) can adapt to main shaft devices with different numbers of steel ropes (4) and different steel rope (4) pitches; the bearing performance of the main shaft device, the anti-skid performance of a friction pad (11) and the brake performance of a brake (5) can be reliably evaluated; joint-test can be performed on vertical well hoisters with multiple specifications before on-site installation, and thus, the pulley block type vertical well hoisting joint-test device has great significance in ensuring the safety of vertical well hoisting.
Description
Description
Technical field
The present invention relates to a combined commissioning and testing apparatus and method for vertical shaft hoists, in particular to a combined commissioning and testing apparatus and method applicable to vertical shaft hoists.
Background Art
As the main mine hoisting equipment, the vertical shaft hoist is responsible for the important tasks of coal gangue hoisting, material lowering, and personnel and equipment lifting, and is the linking hub between the underground area and the surface area in coal mines. The combined commissioning and testing of a hoist refers to combined testing whether the main shaft device (including a drum, a main shaft, and a bearing housing) and the braking system can adapt to normal and extreme working conditions after the main shaft device, liner and braking system are fitted and installed successfully, which is a key step before the field installation of the hoist. In addition, as a large-size essential equipment installed in a one-off manner, the vertical shaft hoist, especially a tower-type vertical shaft hoist, requires a high installation cost for on-site installation. Therefore, the combined commissioning and testing before shipping from the factory must comprehensively reflect the driving and braking performance of the mine shaft hoist, in order to avoid the huge installation and commissioning cost incurred by secondary installation.
At present, the combined commissioning and testing of a vertical shaft hoist is mainly carried out in a zero-load operation state, i.e., the main shaft device is only driven by a motor to operate freely, and no load testing is carried out. Consequently, the load-bearing property of the main shaft device, the anti-slip property of the liner, and the braking performance of the brake, which are crucial in the vertical shaft hoisting system, cannot be evaluated accurately through the combined commissioning and testing. 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 hoist. However, setting up separate testing installations for vertical shaft hoists with different specifications respectively will result in very high construction and operation costs, and cannot meet the requirement for economic efficiency. Therefore, it is difficult for the manufacturers to set up an appropriate loading and braking test platform for different models of vertical shaft hoists before the vertical shaft hoists are shipped from the factory. At present, special combined commissioning and testing apparatuses are unavailable, and the combined commissioning and testing is still in a stage of theoretical calculation and 3D mechanical simulation.
At present, the researches on the testing of mine hoisting systems mainly focus on the detection of hoists in service in mines. For example, the method for monitoring the state of deep well hoisting device 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 operation 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 systems disclosed in Patent No. ZL 201410528414.1 utilizes horizontal dragging with a motor to replace the vertical hoisting under actual operating conditions to simulate different mine hoisting functions; the multi-functional simulation and testing platform for ultra-deep mine shaft hoisting systems disclosed in the Patent No. ZL 201610118998.4 can simulate the movement state of ultra-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 for winding hoisting steel wire rope of KM deep well disclosed in Patent No. ZL 201410728399.5 can simulate the impact and friction condition of a steel wire rope under the conditions of 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 cannot realize 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 major manufacturers, improve the manufacturing quality for small manufacturers, and ensure the safety of hoisting systems from the source; secondly, the researches are mainly oriented to the testing of a specific type of hoisting system, and 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, loading test cannot be carried out before the installation, and the load-bearing property of the main shaft device, the anti-slip property of the liner and the braking performance of the brake cannot be evaluated accurately; fourthly, the detection of hoists in service in mines cannot 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; besides, the detection cannot simulate severe conditions such as jamming and secondary loading, 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 combined commissioning and testing apparatus for vertical shaft hoists, which can perform combined commissioning and testing 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 conditions, as well as extreme operating conditions such as jamming and secondary loading conditions, so as to accurately evaluate the load-bearing property 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: the object of the present invention is to overcome the drawbacks in the prior art, and to provide a combined commissioning and testing apparatus and method for endless rope-type vertical shaft hoist, which has a simple structure and is reliable and convenient.
Technical solution: to achieve the above-mentioned object, a combined commissioning and testing apparatus for pulley block-type vertical shaft hoist according to the present invention comprises a supporting base, pulley block loading devices, pulley ropes and a rope pitch positioning device, wherein the supporting base is in a groove shape in the horizontal transverse direction and in a stepped shape in the horizontal longitudinal direction, and forms a platform I, a platform II and a platform III at different elevations; two pulley block loading devices are arranged symmetrically on the platform III of the supporting base (14) in the horizontal longitudinal direction; a main shaft device of the tested vertical shaft hoist composed of a motor, a bearing housing, a main shaft, a drum, a brake disc, a friction liner, a brake supporting plate and a brake is arranged horizontally across the platform I of the supporting base; a guide wheel of the tested vertical shaft hoist is mounted horizontally across the platform II of the supporting base; one end of the pulley rope is fixed on a pulley rope fixing clip of the pulley block loading device, and the pulley rope is wound over a movable pulley II, a fixed pulley and a movable pulley I sequentially, and finally fixed on a pulley rope positioning clip of the rope pitch positioning device.
the pulley block loading device comprises a roller ball, a sliding plate, a fixed bottom plate, loading cylinder piston rods, loading cylinder jackets, a fixed vertical plate, wrap angle positioning beams, wrap angle positioning holes, wrap angle positioning wheels, a positioning wheel bearing housing, a positioning wheel bolt, movable pulleys I, a movable pulley beam, movable pulleys II, pulley rope fixing clips, fixed pulley beams, and fixed pulleys; the fixed vertical plate is arranged on one end of the fixed bottom plate in the vertical direction, the loading cylinder jackets are arranged on the top end and bottom end of the fixed vertical plate, the sliding plate is fixed to the loading cylinder piston rods, and the roller ball is arranged on the bottom of the sliding plate in the vertical direction, so that the sliding plate can slide freely in the horizontal transverse direction under the pushing/pulling action of the loading cylinder; the wrap angle positioning beams and the fixed pulley beams are arranged on the two sides of the middle part of the fixed vertical plate respectively, the wrap angle positioning beam is provided with wrap angle positioning holes in the horizontal transverse direction, the wrap angle positioning wheel is arranged on the positioning wheel bearing housing, the positioning wheel bearing housing is arranged on the wrap angle positioning beam via the wrap angle positioning holes by means of the positioning wheel bolt, the fixed pulleys are clamped between two side plates of the fixed pulley beam in the horizontal transverse direction, the pulley rope fixing clips are arranged on a front plate of the fixed pulley beam in the horizontal longitudinal direction, the movable pulley beam is arranged on the middle part of the sliding plate, and the movable pulleys I and the movable pulleys II are clamped between the side plates of the movable pulley beam in the horizontal transverse direction; the wrap angle positioning wheels, the fixed pulleys, the movable pulleys I, the movable pulleys II and the pulley rope fixing clips are arranged in rows in the horizontal longitudinal direction in the same number as the number of the pulley ropes, and the number of the pulley ropes is greater than the number of the steel wire ropes, the wrap angle positioning wheels, the fixed pulleys, the movable pulleys I and the movable pulleys II are all provided with rope grooves respectively, and the fixed pulley, the movable pulley II and the movable pulley I in the same row form a pulley block.
the rope pitch positioning device comprises pulley rope positioning clips, rope pitch positioning plates, rope pitch positioning holes, positioning pins, positioning fixtures, steel wire rope clips, and a plurality of balancing cylinders that are composed of a balancing cylinder jacket and a balancing cylinder piston rod respectively; the pulley rope positioning clip is fixed to one side of the rope pitch positioning plate and connects the pulley rope and the rope pitch positioning plate together via the pulley rope positioning clip, one end of the positioning fixture is fixed to the other side of the rope pitch positioning plate via a rope pitch positioning hole by means of the positioning pin, the balancing cylinder jacket is fixed to the other end of the positioning fixture, the steel wire rope clip is arranged on the top end of the balancing cylinder piston rod, and the bearing cavities of the balancing cylinders communicate with each other through pipelines.
the rope pitch positioning plate is provided with four columns of rope pitch positioning holes at pitches of 200mm, 250mm, 300mm and 350mm in the vertical direction, and is provided with another set of rope pitch positioning holes at the same pitches in the horizontal direction for arranging the positioning fixtures.
the number of positioning fixtures are four or six, depending on the specification of the main shaft device of the tested vertical shaft hoist.
A testing method by using the combined commissioning and testing apparatus for pulley block-type vertical shaft hoist comprises the following steps:
(a) mounting the fixed vertical plate to one end of the fixed bottom plate in the vertical direction, mounting the loading cylinder jackets to the top end and the bottom end of the fixed vertical plate, mounting the roller ball on the bottom of the sliding plate in the vertical direction, mounting the sliding plate on the loading cylinder piston rods; thus, multiple loading cylinders push/pull the sliding plate, so that the sliding plate can slide freely in the horizontal transverse direction; mounting the wrap angle positioning beam and the fixed pulley beam to the middle part of the fixed vertical plate, mounting the wrap angle positioning wheel on the positioning wheel bearing housing, and determining the distance between the two pulley block loading devices according to the drum diameter D and wrap angle a of the main shaft device of the tested vertical shaft hoist, and the vertical distance H between the axis of the drum and the axis of the guide wheel:
AD = D - H tan(a -rc) cos(a -;r)
selecting the wrap angle positioning hole at an appropriate position accordingly, fixing the positioning wheel bearing housing to the wrap angle positioning beam by means of the positioning wheel bolt; according to the load testing requirements of the tested vertical shaft hoist, selecting the number of the pulley ropes and determining the number of the wrap angle positioning wheels, the fixed pulleys, the movable pulleys I and the movable pulleys II; the number of pulley ropes is greater than the number of steel wire ropes, so that the requirement on diameters of the pulley ropes, the wrap angle positioning wheels, the fixed pulleys, the movable pulleys I and the movable pulleys II is reduced under the same load test conditions; mounting the fixed pulleys between the horizontal transverse side plates of the fixed pulley beam in the horizontal longitudinal direction, mounting the pulley rope fixing clips on the horizontal longitudinal front plate of the fixed pulley beam, mounting the movable pulley beam to the middle part of the sliding plate, mounting the movable pulleys I and the movable pulleys II between the horizontal transverse side plates of the movable pulley beam, so as to assemble two pulley block loading devices;
(b) mounting the pulley rope positioning clips to one side of the rope pitch positioning plate; according to the number and pitch of the steel wire ropes of the main shaft device of the tested vertical shaft hoist, fixing one end of each of the positioning fixtures with the same number of the steel wire ropes to the other side of the rope pitch positioning plate through the rope pitch positioning holes by means of the positioning pins; fixing the balancing cylinder jacket of a balancing cylinder to the other end of each positioning fixture, mounting the steel wire rope clip on the top end of the balancing cylinder piston rod, and connecting the bearing cavities of all balancing cylinders through pipelines so that the bearing cavities communicate with each other, so as to assemble two rope pitch positioning devices;
(c) mounting two pulley block loading devices symmetrically on the platform III of the supporting base in the horizontal longitudinal direction, mounting the main shaft device of the tested vertical shaft hoist horizontally across the platform I of the supporting base, mounting the bearing housing of the main shaft device horizontally across the platform I of the supporting base, mounting the motor, main shaft and drum of the main shaft device coaxially, mounting the brake disc on the rim of the drum, pressing the friction liner on the casing of the drum in the circumferential direction, mounting the brake supporting plates horizontally across the platform I of the supporting base at the two sides of the main shaft device, mounting the brake on the brake supporting plate in the circumferential direction of the rim of the brake disc, so that the brake can clamp the brake disc and thereby brakes the main shaft device when the brake acts, and mounting the guide wheel of the tested vertical shaft hoist horizontally across the platform II of the supporting base;
(d) lapping the steel wire rope in the rope grooves of the guide wheel and the friction liner respectively, connecting the two ends of the steel wire rope to the steel wire rope clips of the two rope pitch positioning devices respectively, mounting one end of the pulley rope to the pulley rope fixing clip of the pulley block loading device, and then winding the pulley rope over the rope grooves of the movable pulley II, the fixed pulley and the movable pulley I sequentially, and finally mounting the pulley rope to the pulley rope positioning clip;
(e) adjusting the oil pressure of the loading cylinder, actuating the pulley block loading devices at the two sides, and controlling the loading pressure of the loading cylinder piston rods, wherein the two pulley block loading devices serve as the load on the lifting side and the load on the lowering side for each other, and the total pushing force of the loading cylinder of the pulley block loading device at one side is:
4 Fhydraulic cylinder Npulley rope Fpulley rope
Nsteelwirerope Fpulley rope - Fsteel wire rope Npuiiey rope
where, Fpuleyropeis the tension force on one pulley rope at the side, Npuley ropeis the number of pulley ropes at the side, Fsteewireropeis the tension force on one steel wire rope at the side, and Nsteewirerope is the number of steel wire ropes of the main shaft device of the tested vertical shaft hoist;
thus, the loading cylinder piston rod at the lifting side is pressed back, the loading cylinder piston rod at the lowering side is extended, the pulley ropes at the two sides are tensioned up, the loading cylinder drives the pulley ropes to move, the pulley ropes drive the steel wire ropes to move via the rope pitch positioning device, and the tension forces on the steel wire ropes are controlled to be the same by the balancing cylinders with bearing cavities communicating with each other; thus, the loads on the steel wire ropes at the two sides under different operating conditions of the main shaft device of the tested vertical shaft hoist are simulated;
(f) carrying out load-bearing property testing of the main shaft device, anti-slip property testing of the friction liner, and braking performance testing of the brake, and completing the combined commissioning and testing of the tested vertical shaft hoist, so as to reliably evaluate the load-bearing property of the main shaft device, the anti-slip property of the friction liner, and the braking performance of the brake. the load-bearing property testing 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, when checking whether the main shaft device has any crack, acoustic emission sensors are mounted at positions where cracks prone to occur, such as the riveting points of the cylindrical shell, supporting rings, reinforcing ribs and web plates of the drum and riveting place of the main shaft, and the stressed states of the drum under zero-load and heavy-load conditions of the main shaft device are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device is adjusted, the loading cylinder is actuated, the drum is loaded within the range of the wrap angle by utilizing the pulley block loading device, and comparative analysis is carried out to determine whether the elastic stress waves at the testing points change significantly before and after the loading, so as to judge whether the main shaft device has any crack at the corresponding positions; secondly, when checking 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, such as the cylindrical shell and the web plates of the drum and the two ends of the main shaft, and the stressed states of the drum under extreme operating conditions of the main shaft device, such as jamming and secondary loading, etc., are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device is adjusted, the loading cylinder is actuated, the drum is loaded within the range of the wrap angle by utilizing the pulley block loading device, and comparative analysis is carried out to determine whether the changes of elastic stress waves at the testing points before and after the loading are beyond allowable thresholds, so as to judge whether the elastic deformations of the main shaft device at the corresponding positions are out of specification, and thereby judge whether the strength of the main shaft device complies with the specification. the anti-slip property testing of the friction liner mainly includes static friction test and dynamic friction test: firstly, when testing static friction, the brake is actuated to clamp the brake disc, the motor is stopped, and the differences in tension force between the steel wire ropes at the two sides under extreme operating conditions of the drum, such as overload and secondary loading, are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device is adjusted, the loading cylinder is actuated, the drum is loaded within the range of the wrap angle by utilizing the pulley block loading device, and a micrometric displacement sensor is utilized to check whether there is any relative slip between the steel wire rope and the friction liner, so as to judge whether the friction liner meets the anti-slip requirements in a static state; secondly, when testing dynamic friction, the brake is actuated to clamp the brake disc, the motor is stopped, and the differences in tension force between the steel wire ropes at the two sides under heavy-load operating conditions of the drum are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device is adjusted, the loading cylinder is actuated, the drum is loaded within the range of the wrap angle by utilizing the pulley block loading device, then the motor is started, the brake is released, and the motor controls the drum to start at an angular acceleration ai and stop at an angular deceleration U2; thus, a micrometric displacement sensor is utilized to check whether the creeping and slip between the steel wire rope and the friction liner are within an allowable range at corresponding angular accelerations, so as to judge whether the friction liner meets the anti-slip requirements in a dynamic state.
the braking performance testing of the brake mainly includes static braking test and dynamic braking test:
firstly, when testing static braking, the brake is actuated to clamp the brake disc, the motor is stopped, and the differences in tension force between the steel wire ropes at the two sides under extreme operating conditions of the drum are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device is adjusted, the loading cylinder is actuated, the drum is loaded within the range of the wrap angle by utilizing the pulley block loading device, and testing whether there is any relative slip between the brake and the brake disc, so as to judge whether the brake can effectively brake the main shaft device in a static state;
secondly, when testing dynamic braking, the brake is actuated to clamp the brake disc, the motor is stopped, and the differences in tension force between the steel wire ropes at the two sides under heavy-load operating conditions of the drum are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device is adjusted, the loading cylinder is actuated, the drum is loaded within the range of the wrap angle by utilizing the pulley block loading device, then the motor is started, the brake is released, and the motor controls the drum to start at an angular acceleration ai and reach a speed v; then the motor is stopped, and the brake is actuated; thus, testing whether the idle stoke time and braking deceleration of the brake are within allowable ranges, so as to judge whether the braking system can effectively brake the main shaft device in a dynamic state.
Beneficial effects: with the technical solution described above, the apparatus provided by the present invention is applicable to vertical shaft hoists of various specifications. To meet the urgent need of combined commissioning and testing apparatuses for vertical shaft hoists, the loads at the two sides of the drum are simulated under a principle that the steel wire rope is driven by pulley blocks and the pulley blocks are driven by hydraulic cylinders; the requirement for the load on the pulley ropes can be significantly reduced by employing parallel driving with multiple pulley ropes, thereby diameter of the pulleys can be reduced under the same load testing conditions, and the economic efficiency, practicability and reliability of the testing apparatus can be significantly improved; the diameter of individual loading cylinders can be reduced by employing multiple hydraulic cylinders for pushing/pulling; the tension force on the tested steel wire ropes can be controlled to be consistent with each other by using balancing cylinders with bearing cavities communicating with each other; two opposite wrap angle positioning wheels are utilized to adapt to main shaft devices with different drum diameters and wrap angles; a rope pitch positioning plate is utilized to adapt to main shaft devices with 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; normal operating conditions such as zero-load, light-load and heavy-load conditions, as well as extreme operating conditions such as overload and secondary heavy loading, can be simulated by utilizing pulley blocks and hydraulic loading in combination; utilizing acoustic emission sensors and micrometric displacement sensors, the apparatus can reliably evaluate the load-bearing property 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 and high versatility, can carry out combined commissioning and testing on different models of vertical shaft hoists before field installation and carry out loading test on the main shaft device in all states, and is of great significance for ensuring the safety of vertical shaft hoisting systems.
Description of Drawings
Fig. 1 is a schematic structural view of the apparatus in the present invention;
Fig. 2 is a schematic structural view of the pulley block loading device in the present invention;
Fig. 3 is a schematic structural view of the rope pitch positioning device in the present invention;
Fig. 4 is a schematic view of the rope pitch positioning principle of the steel wire ropes in the present invention;
Fig. 5 is a schematic view of the working principle of the apparatus in the present invention.
In the figures: 1 - pulley block loading device, 1-a - roller ball, 1-b - sliding plate, 1-c - fixed bottom plate, 1-d - loading cylinder piston rod, 1-e - loading cylinder jacket, 1-f - fixed vertical plate, 1-g - wrap angle positioning beam, 1-h - wrap angle positioning hole, 1-i - wrap angle positioning wheel, 1-j - positioning wheel bearing housing, 1-k - positioning wheel bolt, 1-1 movable pulley I, 1-m - movable pulley beam, 1-n - movable pulley II, 1-o - pulley rope fixing clip, i-p - fixed pulley beam, 1-q - fixed pulley, 2 - pulley rope, 3 - rope pitch positioning device, 3-a pulley rope positioning clip, 3-b - rope pitch positioning plate, 3-c - rope pitch positioning hole, 3-d - positioning pin, 3-e - positioning fixture, 3-f - balancing cylinder jacket, 3-g - balancing cylinder piston rod, 3-h - steel wire rope clip, 4 - steel wire rope, 5 - brake, 6 - brake supporting plate, 7 motor, 8 - main shaft, 9 - bearing housing, 10 - drum, 11 - friction liner, 12 - brake disc, 13 guide wheel, 14 - supporting base.
Embodiments
Hereunder the present invention will be further detailed in an embodiment with reference to the drawings.
As shown in Fig. 1, a combined commissioning and testing apparatus for pulley block-type vertical shaft hoist comprises a supporting base 14, pulley block loading devices 1, pulley ropes 2 and a rope pitch positioning device 3, wherein the supporting base 14 is in a groove shape in the horizontal transverse direction and in a stepped shape in the horizontal longitudinal direction, and forms a platform I, a platform II and a platform III at different elevations; two pulley block loading devices 1 are arranged symmetrically on the platform III of the supporting base 14 in the horizontal longitudinal direction; a main shaft device of the tested vertical shaft hoist composed of a motor 7, a bearing housing 9, a main shaft 8, a drum 10, a brake disc 12, a friction liner 11, a brake supporting plate 6 and a brake 5 is arranged horizontally across the platform I of the supporting base 14; a guide wheel 13 of the tested vertical shaft hoist is mounted horizontally across the platform II of the supporting base 14; one end of the pulley rope 2 is fixed on a pulley rope fixing clip 1-o of the pulley block loading device 1, and the pulley rope 2 is wound over a movable pulley II 1-n, a fixed pulley 1-q and a movable pulley I 1-1 sequentially and finally fixed on a pulley rope positioning clip
3-a of the rope pitch positioning device 3.
As shown in Fig. 2, the pulley block loading device 1 comprises a roller ball 1-a, a sliding plate 1-b, a fixed bottom plate 1-c, loading cylinder piston rods 1-d, loading cylinder jackets 1-e, a fixed vertical plate 1-f, wrap angle positioning beams 1-g, wrap angle positioning holes 1-h, a wrap angle positioning wheel 1-i, a positioning wheel bearing housing 1-j, a positioning wheel bolt 1-k, movable pulleys I 1-1, a movable pulley beam 1-m, movable pulleys 11I1-n, pulley rope fixing clips 1-o, fixed pulley beams 1-p and fixed pulleys 1-q; the fixed vertical plate 1-f is arranged on one end of the fixed bottom plate 1-c in the vertical direction, the loading cylinder jackets 1-e are arranged on the top end and the bottom end of the fixed vertical plate 1-f, the sliding plate 1-b is fixed to the loading cylinder piston rods 1-d, and the roller ball 1-a is arranged on the bottom of the sliding plate 1-b in the vertical direction, so that the sliding plate 1-b can slide freely in the horizontal transverse direction under the pushing/pulling action of the loading cylinder; the wrap angle positioning beams 1-g and the fixed pulley beams 1-p are arranged on the two sides of the middle part of the fixed vertical plate 1-f respectively, the wrap angle positioning beam 1-g is provided with wrap angle positioning holes 1-h in the horizontal transverse direction, the wrap angle positioning wheel 1-i is arranged on the positioning wheel bearing housing 1-j, the positioning wheel bearing housing 1-j is arranged on the wrap angle positioning beam 1-g via the wrap angle positioning holes 1-h by means of the positioning wheel bolt 1-k, the fixed pulleys 1-q are clamped between two side plates of the fixed pulley beam 1-p in the horizontal transverse direction, the pulley rope fixing clips 1-o are arranged on a front plate of thefixed pulley beam 1-p in the horizontal longitudinal direction, the movable pulley beam 1-m is arranged on the middle part of the sliding plate 1-b, and the movable pulleys I 1-1 and the movable pulleys II1-n are clamped between the side plates of the movable pulley beam 1-m in the horizontal transverse direction; the wrap angle positioning wheels 1-i, the fixed pulleys 1-q, the movable pulleys I 1-1, the movable pulleys 11I1-n and the pulley rope fixing clips 1-o are arranged in rows in the horizontal longitudinal direction in the same number which is the same to the number of the pulley ropes 2, and the number of the pulley ropes 2 is greater than the number of the steel wire ropes 4, the wrap angle positioning wheels 1-i, the fixed pulleys 1-q, the movable pulleys I 1-1 and the movable pulleys II1-n are all provided with rope grooves respectively, and the fixed pulley 1-q, the movable pulley 11I1-n and the movable pulley I 1-1 in the same row form a pulley block.
As shown in Fig. 3, the rope pitch positioning device 3 comprises pulley rope positioning clips 3-a, rope pitch positioning plates 3-b, rope pitch positioning holes 3-c, positioning pins 3-d, positioning fixtures 3-e, steel wire rope clips 3-h and a plurality of balancing cylinders that are composed of a balancing cylinder jacket 3-f and a balancing cylinder piston rod 3-g respectively; the pulley rope positioning clip 3-a is fixed to one side of the rope pitch positioning plate 3-b and connects the pulley rope 2 and the rope pitch positioning plate 3-b together via the pulley rope positioning clip 3-a, one end of the positioning fixture 3-e is fixed to the other side of the rope pitch positioning plate 3-b via a rope pitch positioning hole 3-c by means of the positioning pin 3-d, the balancing cylinderjacket 3-f is fixed to the other end of the positioning fixture 3-e, the steel wire rope clip 3-h is arranged on the top end of the balancing cylinder piston rod 3-g, and the bearing cavities of the balancing cylinders communicate with each other through pipelines.
As shown in Fig. 4, the rope pitch positioning plate 3-b is provided with four columns of rope pitch positioning holes 3-c at pitches of 200mm, 250mm, 300mm and 350mm in the vertical direction, and is provided with another set of rope pitch positioning holes 3-c at the same pitches in the horizontal direction for arranging the positioning fixtures 3-e. The number of positioning fixtures 3-e are four or six, depending on the specification of the main shaft device of the tested vertical shaft hoist.
As shown in Fig. 5, a combined commissioning and testing method for pulley block-type vertical shaft hoist comprises the following steps:
(a) mounting the fixed vertical plate 1-f to one end of the fixed bottom plate 1-c in the vertical direction, mounting the loading cylinder jackets 1-e to the top end and the bottom end of the fixed vertical plate 1-f, mounting the roller ball 1-a on the bottom of the sliding plate 1-b in the vertical direction, mounting the sliding plate 1-b on the loading cylinder piston rods 1-d; thus multiple loading cylinders push/pull the sliding plate 1-b, so that the sliding plate 1-b can slide freely in the horizontal transverse direction; mounting the wrap angle positioning beam 1-g and the fixed pulley beam 1-p to the middle part of the fixed vertical plate 14, mounting the wrap angle positioning wheel 1-i on the positioning wheel bearing housing 1-j, and determining the distance between the two pulley block loading devices 1 according to the drum diameter D and wrap angle a of the main shaft device of the tested vertical shaft hoist and the vertical distance H between the axis of the drum and the axis of the guide wheel:
AD= D - H tan(a -r) cos(a-7r)
selecting the wrap angle positioning hole 1-h at an appropriate position accordingly, fixing the positioning wheel bearing housing 1-j to the wrap angle positioning beam 1-g by means of the positioning wheel bolt 1-k; according to the load testing requirements of the tested vertical shaft hoist, selecting an appropriate number of the pulley ropes 2 and determining the number of the wrap angle positioning wheels 1-i, the fixed pulleys 1-q, the movable pulleys I 1-1 and the movable pulleys II1-n; the number of pulley ropes 2 is greater than the number of steel wire ropes 4, so that the requirement on diameters of the pulley ropes 2, the wrap angle positioning wheels 1-i, the fixed pulleys 1-q, the movable pulleys I1-1 and the movable pulleys II1-n is reduced under the same load test conditions; mounting the fixed pulleys 1-q between the horizontal transverse side plates of the fixed pulley beam 1-p in the horizontal longitudinal direction, mounting the pulley rope fixing clips 1-o on the horizontal longitudinal front plate of the fixed pulley beam i-p, mounting the movable pulley beam 1-m to the middle part of the sliding plate 1-b, mounting the movable pulleys I 1-1 and the movable pulleys II1-n between the horizontal transverse side plates of the movable pulley beam 1-m, so as to assemble two pulley block loading devices 1;
(b) mounting the pulley rope positioning clips 3-a to one side of the rope pitch positioning plate 3-b; according to the number and pitch of the steel wire ropes of the main shaft device of the tested vertical shaft hoist, fixing one end of each of the positioning fixtures 3-e with the same number of the steel wire ropes to the other side of the rope pitch positioning plate 3-b through the rope pitch positioning holes 3-c by means of the positioning pins 3-d; fixing the balancing cylinder jacket 3-f of a balancing cylinder to the other end of each positioning fixture 3-e, mounting the steel wire rope clip 3-h on the top end of the balancing cylinder piston rod 3-g, and connecting the bearing cavities of all balancing cylinders through pipelines so that the bearing cavities communicate with each other, so as to assemble two rope pitch positioning devices 3; (c) mounting two pulley block loading devices 1 symmetrically on the platform III of the supporting base 14 in the horizontal longitudinal direction, mounting the main shaft device of the tested vertical shaft hoist horizontally across the platform I of the supporting base 14, mounting the bearing housing 9 of the main shaft device horizontally across the platform I of the supporting base 14, mounting the motor 7, main shaft 8 and drum 10 of the main shaft device coaxially, mounting the brake disc 12 on the rim of the drum 10, pressing the friction liner 11 on the casing of the drum 10 in the circumferential direction, mounting the brake supporting plates 6 horizontally across the platform I of the supporting base 14 at the two sides of the main shaft device, mounting the brake 5 on the brake supporting plate 6 in the circumferential direction of the rim of the brake disc 12, so that the brake 5 can clamp the brake disc 12 and thereby brakes the main shaft device when the brake 5 acts, and mounting the guide wheel 13 of the tested vertical shaft hoist horizontally across the platform II of the supporting base 14; (d) lapping the steel wire rope 4 in the rope grooves of the guide wheel 13 and the friction liner 11 respectively, connecting the two ends of the steel wire rope 4 to the steel wire rope clips 3-h of the two rope pitch positioning devices 3 respectively; mounting one end of the pulley rope 2 to the pulley rope fixing clip 1-o of the pulley block loading device 1, and then winding the pulley rope 2 over the rope grooves of the movable pulley II 1-n, the fixed pulley 1-q and the movable pulley I 1-1 sequentially, and finally mounting the pulley rope 2 to the pulley rope positioning clip 3-a; (e) adjusting the oil pressure of the loading cylinder, actuating the pulley block loading devices 1 at the two sides, and controlling the loading pressure of the loading cylinder piston rods 1-d, wherein the two pulley block loading devices 1 serve as the load on the lifting side and the load on the lowering side for each other, and the total pushing force of the loading cylinder of the pulley block loading device at one side is:
4 Fhydraulic cylinder Npulley rope Fpulley rope
Nsteel wire rope Fpuley rope r Fsteel wire rope L Npulley rope
where, Fpuley ropeis the tension force on one pulley rope at the side, Npuileyropeis the number of pulley ropes at the side, Fseelwirerope is the tension force on one steel wire rope at the side, and Nsteelwire rope is the number of steel wire ropes of the tested main shaft device; thus, the loading cylinder piston rod 1-d at the lifting side is pressed back, the loading cylinder piston rod 1-d at the lowering side is extended, the pulley ropes 2 at the two sides are tensioned up, the loading hydraulic cylinder drives the pulley ropes 2 to act, the pulley ropes 2 drive the steel wire ropes 4 to act via the rope pitch positioning device 3, and the tension forces on the steel wire ropes 4 are controlled to be the same by the balancing cylinders with bearing cavities communicating with each other; thus, the loads on the steel wire ropes 4 at the two sides under different operating conditions of the main shaft device of the tested vertical shaft hoist are simulated; (f) the load-bearing property testing of the main shaft device mainly includes crack detection and strength check, during which the brake 5 clamps the brake disc 12 and the motor 7 is stopped: firstly, when checking whether the main shaft device has any crack, acoustic emission sensors are mounted at positions where cracks prone to occur, such as the riveting points of the cylindrical shell, supporting rings, reinforcing ribs and web plates of the drum 10 and riveting place of the main shaft 8, and the stressed states of the drum 10 under zero-load and heavy-load conditions of the main shaft device are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device 1 is adjusted, the loading hydraulic cylinder is actuated, the drum 10 is loaded within the range of the wrap angle by utilizing the pulley block loading device 1, and comparative analysis is carried out to determine whether the elastic stress waves at the testing points change significantly before and after the loading, so as to judge whether the main shaft device has any crack at the corresponding positions; secondly, when checking 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, such as the cylindrical shell and the web plates of the drum 10 and the two ends of the main shaft 8, and the stressed states of the drum 10 under extreme operating conditions of the main shaft device, such as jamming and secondary loading, are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device 1 is adjusted, the loading hydraulic cylinder is actuated, the drum 10 is loaded within the range of the wrap angle by utilizing the pulley block loading device 1, and comparative analysis is carried out to determine whether the changes of elastic stress waves at the testing points before and after the loading are beyond allowable thresholds, so as to judge whether the elastic deformations of the main shaft device at the corresponding positions are out of specification, and thereby judge whether the strength of the main shaft device complies with the specification.
(g) the anti-slip property testing of the friction liner mainly includes static friction test and dynamic friction test: firstly, when static friction testing is conducted, the brake 5 is actuated to clamp the brake disc 12, the motor 7 is stopped, and the differences in tension force between the steel wire ropes at the two sides under extreme operating conditions of the drum 10, such as overload and secondary loading, are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device 1 is adjusted, the loading hydraulic cylinder is actuated, the drum 10 is loaded within the range of the wrap angle by utilizing the pulley block loading device 1, and a micrometric displacement sensor is utilized to check whether there is any relative slip between the steel wire rope 4 and the friction liner 11, so as to judge whether the friction liner meets the anti-slip requirements in a static state; secondly, when dynamic friction testing is conducted, the brake 5 is actuated to clamp the brake disc 12, the motor 7 is stopped, and the differences in tension force between the steel wire ropes at the two sides under heavy-load operating conditions of the drum 10 are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device 1 is adjusted, the loading hydraulic cylinder is actuated, the drum 10 is loaded within the range of the wrap angle by utilizing the pulley block loading device 1, then the motor 7 is started, the brake 5 is released, and the motor 7 controls the drum 10 to start at an angular acceleration ai and stop at an angular deceleration U2; thus, a micrometric displacement sensor is utilized to check whether the creeping and slip between the steel wire rope 4 and the friction liner 11 are within an allowable range at corresponding angular accelerations, so as to judge whether the friction liner 11 meets the anti-slip requirements in a dynamic state;
(h) the braking performance testing of the brake mainly includes static braking test and dynamic braking test: firstly, when static braking testing is conducted, the brake 5 is actuated to clamp the brake disc 12, the motor 7 is stopped, and the differences in tension force between the steel wire ropes at the two sides under extreme operating conditions of the drum 10 are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device 1 is adjusted, the loading hydraulic cylinder is actuated, the drum 10 is loaded within the range of the wrap angle by utilizing the pulley block loading device 1, and testing whether there is any relative slip between the brake 5 and the brake disc 12, so as to judge whether the brake 5 can effectively brake the main shaft device in a static state; secondly, when dynamic braking testing is conducted, the brake 5 is actuated to clamp the brake disc 12, the motor 7 is stopped, and the differences in tension force between the steel wire ropes at the two sides under heavy-load operating conditions of the drum 10 are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device 1 is adjusted, the loading hydraulic cylinder is actuated, the drum 10 is loaded within the range of the wrap angle by utilizing the pulley block loading device 1, then the motor 7 is started, the brake 5 is released, and the motor 7 controls the drum 10 to start at an angular acceleration ai and reach a speed v; then the motor 7 is stopped, and the brake 5 is actuated; thus, testing whether the idle stoke time and braking deceleration of the brake are within allowable ranges, so as to judge whether the braking system can effectively brake the main shaft device in a dynamic state;
(i) finally, completing the combined commissioning and testing of the tested vertical shaft hoist, so as to evaluate the load-bearing property of the main shaft device, the anti-slip property of the friction liner and the braking performance of the brake reliably.
Claims (8)
1. A combined commissioning and testing apparatus for pulley block-type vertical shaft hoist, comprising a supporting base (14), pulley block loading devices (1), pulley ropes (2), steel wire ropes (4) and a rope pitch positioning device (3), wherein the supporting base (14) is in a groove shape in the horizontal transverse direction and in a stepped shape in the horizontal longitudinal direction, and forms a platform I, a platform II and a platform III at different elevations; two pulley block loading devices (1) are arranged symmetrically on the platform III of the supporting base (14) in the horizontal longitudinal direction; a main shaft device of the tested vertical shaft hoist composed of a motor (7), a bearing housing (9), a main shaft (8), a drum (10), a brake disc (12), a friction liner (11), a brake supporting plate (6) and a brake (5) is arranged horizontally across the platform I of the supporting base (14); a guide wheel (13) of the tested vertical shaft hoist is mounted horizontally across the platform II of the supporting base (14); one end of the pulley rope (2) is fixed on a pulley rope fixing clip (1-o) of the pulley block loading device (1), and the pulley rope (2) is wound over a movable pulley 11 (1-n), a fixed pulley (1-q) and a movable pulley I (1-1) sequentially, and finally fixed on a pulley rope positioning clip (3-a) of the rope pitch positioning device (3); the rope pitch positioning device (3) comprises pulley rope positioning clips (3-a), rope pitch positioning plates (3-b), rope pitch positioning holes (3-c), positioning pins (3-d), positioning fixtures (3-e), steel wire rope clips (3-h), and a plurality of balancing cylinders that are composed of a balancing cylinder jacket (3-f) and a balancing cylinder piston rod (3-g) respectively; the pulley rope positioning clip (3-a) is fixed to one side of the rope pitch positioning plate (3-b) and connects the pulley rope (2) and the rope pitch positioning plate (3-b) together via the pulley rope positioning clip (3-a), one end of the positioning fixture (3-e) is fixed to the other side of the rope pitch positioning plate (3-b) via a rope pitch positioning hole (3-c) by means of the positioning pin (3-d), the balancing cylinder jacket (3-f) is fixed to the other end of the positioning fixture (3-e), the steel wire rope clip (3-h) is arranged on the top end of the balancing cylinder piston rod (3-g), and the bearing cavities of the balancing cylinders communicate with each other through pipelines; lapping the steel wire rope (4) in the rope grooves of the guide wheel (13) and the friction liner (11) respectively, connecting the two ends of the steel wire rope (4) to the steel wire rope clips (3-h) of the two rope pitch positioning devices (3) respectively.
2. The combined commissioning and testing apparatus for pulley block-type vertical shaft hoist according to claim 1, wherein, the pulley block loading device (1) comprises a roller ball (1-a), a sliding plate (1-b), a fixed bottom plate (1-c), loading cylinder piston rods (1-d), loading cylinder jackets (1-e), a fixed vertical plate (1-f), wrap angle positioning beams (1-g), wrap angle positioning holes (1-h), wrap angle positioning wheels (1-i), a positioning wheel bearing housing (1-j), a positioning wheel bolt (1-k), movable pulleys I (1-1), a movable pulley beam (1-m), movable pulleys 11 (1-n), pulley rope fixing clips (1-o), fixed pulley beams (1-p), and fixed pulleys (1-q); the fixed vertical plate (1-f) is arranged on one end of the fixed bottom plate (1-c) in the vertical direction, the loading cylinder jackets (1-e) are arranged on the top end and the bottom end of the fixed vertical plate (1-f), the sliding plate (1-b) is fixed to the loading cylinder piston rods (1-d), and the roller ball (1-a) is arranged on the bottom of the sliding plate (1-b) in the vertical direction, so that the sliding plate (1-b) can slide freely in the horizontal transverse direction under the pushing/pulling action of the loading cylinder; the wrap angle positioning beams (1-g) and the fixed pulley beams (1-p) are arranged on the two sides of the middle part of thefixed vertical plate (1-f) respectively, the wrap angle positioning beam (1-g) is provided with wrap angle positioning holes (1-h) in the horizontal transverse direction, the wrap angle positioning wheel (1-i) is arranged on the positioning wheel bearing housing (1-j), the positioning wheel bearing housing (1-j) is arranged on the wrap angle positioning beam (1-g) via the wrap angle positioning holes (1-h) by means of the positioning wheel bolt (1-k), thefixed pulleys (1-q) are clamped between two side plates of the fixed pulley beam (1-p) in the horizontal transverse direction, the pulley rope fixing clips (1-o) are arranged on a front plate of the fixed pulley beam (1-p) in the horizontal longitudinal direction, the movable pulley beam (1-m) is arranged on the middle part of the sliding plate (1-b), and the movable pulleys I (1-1) and the movable pulleys 11 (1-n) are clamped between the side plates of the movable pulley beam (1-m) in the horizontal transverse direction; the wrap angle positioning wheels (1-i), the fixed pulleys (1-q), the movable pulleys 1 (1-1), the movable pulleys 11 (1-n) and the pulley rope fixing clips (1-o) are arranged in rows in the horizontal longitudinal direction in the same number as the number of the pulley ropes (2), and the number of the pulley ropes (2) is greater than the number of the steel wire ropes (4), the wrap angle positioning wheels (1-i), the fixed pulleys (1-q), the movable pulleys I (1-1) and the movable pulleys 11 (1-n) are all provided with rope grooves respectively, and the fixed pulley (1-q), the movable pulley 11 (1-n) and the movable pulley 1 (1-1) in the same row form a pulley block.
3. The combined commissioning and testing apparatus for pulley block-type vertical shaft hoist according to claim 1, wherein, the rope pitch positioning plate (3-b) is provided with four columns of rope pitch positioning holes (3-c) at pitches of 200mm, 250mm, 300mm and 350mm in the vertical direction, and is provided with another set of rope pitch positioning holes (3-c) at the same pitches in the horizontal direction for arranging the positioning fixtures (3-e).
4. The combined commissioning and testing apparatus for pulley block-type vertical shaft hoist according to claim 1, wherein the number of positioning fixtures (3-e) are four or six, depending on the specification of the main shaft device of the tested vertical shaft hoist.
5. A testing method by using the combined commissioning and testing apparatus for pulley block-type vertical shaft hoist according to claim 2, comprising the following steps: (a) mounting the fixed vertical plate (1-f) to one end of the fixed bottom plate (1-c) in the vertical direction, mounting the loading cylinder jackets (1-e) to the top end and the bottom end of the fixed vertical plate (1-f), mounting the roller ball (1-a) on the bottom of the sliding plate (1-b) in the vertical direction, mounting the sliding plate (1-b) on the loading cylinder piston rods (1-d); thus, multiple loading cylinders push/pull the sliding plate (1-b), so that the sliding plate (1-b) can slide freely in the horizontal transverse direction; mounting the wrap angle positioning beam (1-g) and the fixed pulley beam (1-p) to the middle part of the fixed vertical plate (1-f), mounting the wrap angle positioning wheel (1-i) on the positioning wheel bearing housing (1-j), and determining the distance between the two pulley block loading devices (1) according to the drum diameter D and wrap angle a of the main shaft device of the tested vertical shaft hoist, and the vertical distance H between the axis of the drum and the axis of the guide wheel:
AD = D - H tan(a -rc) cos(a -7c)
selecting the wrap angle positioning hole (1-h) at an appropriate position accordingly, fixing the positioning wheel bearing housing (1-j) to the wrap angle positioning beam (1-g) by means of the positioning wheel bolt (1-k); according to the load testing requirements of the tested vertical shaft hoist, selecting the number of the pulley ropes (2) and determining the number of the wrap angle positioning wheels (1-i), the fixed pulleys (1-q), the movable pulleys 1 (1-1) and the movable pulleys 11 (1-n); the number of pulley ropes (2) is greater than the number of steel wire ropes (4), so that the requirement on diameters of the pulley ropes (2), the wrap angle positioning wheels (1-i), the fixed pulleys (1-q), the movable pulleys I (1-1) and the movable pulleys 11 (1-n) is reduced under the same load test conditions; mounting the fixed pulleys (1-q) between the horizontal transverse side plates of the fixed pulley beam (l-p) in the horizontal longitudinal direction, mounting the pulley rope fixing clips (1-o) on the horizontal longitudinal front plate of the fixed pulley beam (1-p), mounting the movable pulley beam (1-m) to the middle part of the sliding plate (1-b), mounting the movable pulleys I (1-1) and the movable pulleys 11 (1-n) between the horizontal transverse side plates of the movable pulley beam (1-m), so as to assemble two pulley block loading devices (1); (b) mounting the pulley rope positioning clips (3-a) to one side of the rope pitch positioning plate (3-b); according to the number and pitch of the steel wire ropes of the main shaft device of the tested vertical shaft hoist, fixing one end of each of the positioning fixtures (3-e) with the same number of the steel wire ropes to the other side of the rope pitch positioning plate (3-b) through the rope pitch positioning holes (3-c) by means of the positioning pins (3-d); fixing the balancing cylinder jacket (3-f) of a balancing cylinder to the other end of each positioning fixture (3-e), mounting the steel wire rope clip (3-h) on the top end of the balancing cylinder piston rod (3-g), and connecting the bearing cavities of all balancing cylinders through pipelines so that the bearing cavities communicate with each other, so as to assemble two rope pitch positioning devices (3); (c) mounting two pulley block loading devices (1) symmetrically on the platform III of the supporting base (14) in the horizontal longitudinal direction, mounting the main shaft device of the tested vertical shaft hoist horizontally across the platform I of the supporting base (14), mounting the bearing housing (9) of the main shaft device horizontally across the platform I of the supporting base (14), mounting the motor (7), main shaft (8) and drum (10) of the main shaft device coaxially, mounting the brake disc (12) on the rim of the drum (10), pressing the friction liner (11) on the casing of the drum (10) in the circumferential direction, mounting the brake supporting plates (6) horizontally across the platform I of the supporting base (14) at the two sides of the main shaft device, mounting the brake (5) on the brake supporting plate (6) in the circumferential direction of the rim of the brake disc (12), so that the brake (5) can clamp the brake disc (12) and thereby brakes the main shaft device when the brake (5) acts, and mounting the guide wheel (13) of the tested vertical shaft hoist horizontally across the platform II of the supporting base (14);
(d) lapping the steel wire rope (4) in the rope grooves of the guide wheel (13) and the friction liner (11) respectively, connecting the two ends of the steel wire rope (4) to the steel wire rope clips (3-h) of the two rope pitch positioning devices (3) respectively, mounting one end of the pulley rope (2) to the pulley rope fixing clip (1-o) of the pulley block loading device (1), and then winding the pulley rope (2) over the rope grooves of the movable pulley 11 (1-n), the fixed pulley (1-q) and the movable pulley I (1-1) sequentially, and finally mounting the pulley rope (2) to the pulley rope positioning clip (3-a);
(e) adjusting the oil pressure of the loading cylinder, actuating the pulley block loading devices (1) at the two sides, and controlling the loading pressure of the loading cylinder piston rods (1-d), wherein the two pulley block loading devices (1) serve as the load on the lifting side and the load on the lowering side for each other, and the total pushing force of the loading cylinder of the pulley block loading device (1) at one side is:
4 Fhydraulic cylinder Npulley rope Fpulley rope
steelwirerope Fpulley rope Fsteel wire rope Npuiiey rope
is the tension force on one pulley rope at the side, Npuleyrope is the number of where, Fpuiieyrope pulley ropes at the side, Fsteelwirerope is the tension force on one steel wire rope at the side, and Nsteelwire rope is the number of steel wire ropes of the main shaft device of the tested vertical shaft hoist;
thus, the loading cylinder piston rod (1-d) at the lifting side is pressed back, the loading cylinder piston rod (1-d) at the lowering side is extended, the pulley ropes (2) at the two sides are tensioned up, the loading cylinder drives the pulley ropes (2) to act, the pulley ropes (2) drive the steel wire ropes (4) to act via the rope pitch positioning device (3), and the tension forces on the steel wire ropes (4) are controlled to be the same by the balancing cylinders with bearing cavities communicating with each other; thus, the loads on the steel wire ropes (4) at the two sides under different operating conditions of the main shaft device of the tested vertical shaft hoist are simulated;
(f) carrying out load-bearing property testing of the main shaft device, anti-slip property testing of the friction liner, and braking performance testing of the brake, and completing the combined commissioning and testing of the tested vertical shaft hoist, so as to reliably evaluate the load-bearing property of the main shaft device, the anti-slip property of the friction liner, and the braking performance of the brake.
6. The testing method according to claim 5, wherein: the load-bearing property testing of the main shaft device mainly includes crack detection and strength check, during which the brake (5) clamps the brake disc (12) and the motor (7) is stopped:
firstly, when checking whether the main shaft device has any crack, acoustic emission sensors are mounted at positions where cracks prone to occur, such as the riveting points of the cylindrical shell, supporting rings, reinforcing ribs and web plates of the drum (10) and riveting place of the main shaft (8), and the stressed states of the drum (10) under zero-load and heavy-load conditions of the main shaft device are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device (1) is adjusted, the loading cylinder is actuated, the drum (10) is loaded within the range of the wrap angle by utilizing the pulley block loading device (1), and comparative analysis is carried out to determine whether the elastic stress waves at the testing points change significantly before and after the loading, so as to judge whether the main shaft device has any crack at the corresponding positions; secondly, when checking 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, such as the cylindrical shell and the web plates of the drum (10) and the two ends of the main shaft (8), and the stressed states of the drum (10) under extreme operating conditions of the main shaft device, such as jamming and secondary loading, are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device (1) is adjusted, the loading cylinder is actuated, the drum (10) is loaded within the range of the wrap angle by utilizing the pulley block loading device (1), and comparative analysis is carried out to determine whether the changes of elastic stress waves at the testing points before and after the loading are beyond allowable thresholds, so as to judge whether the elastic deformations of the main shaft device at the corresponding positions are out of specification, and thereby judge whether the strength of the main shaft device complies with the specification.
7. The testing method according to claim 5, wherein: the anti-slip property testing of the friction liner mainly includes static friction test and dynamic friction test:
firstly, when static friction testing is conducted, the brake (5) is actuated to clamp the brake disc (12), the motor (7) is stopped, and the differences in tension force between the steel wire ropes at the two sides under extreme operating conditions of the drum (10), such as overload and secondary loading, are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device (1) is adjusted, the loading cylinder is actuated, the drum (10) is loaded within the range of the wrap angle by utilizing the hydraulic loading device (1), and a micrometric displacement sensor is utilized to check whether there is any relative slip between the steel wire rope (4) and the friction liner (11), so as to judge whether the friction liner meets the anti-slip requirements in a static state;
secondly, when dynamic friction testing is conducted, the brake (5) is actuated to clamp the brake disc (12), the motor (7) is stopped, and the differences in tension force between the steel wire ropes at the two sides under heavy-load operating conditions of the drum (10) are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device (1) is adjusted, the loading cylinder is actuated, the drum (10) is loaded within the range of the wrap angle by utilizing the pulley block loading device (1), then the motor (7) is started, the brake (5) is released, and the motor (7) controls the drum (10) to start at an angular acceleration ai and stop at an angular deceleration U2; thus, a micrometric displacement sensor is utilized to check whether the creeping and slip between the steel wire rope (4) and the friction liner (11) are within an allowable range at corresponding angular accelerations, so as to judge whether the friction liner (11) meets the anti-slip requirements in a dynamic state.
8. The testing method according to claim 5, wherein: the braking performance testing of the brake mainly includes static braking test and dynamic braking test:
firstly, when static braking testing is conducted, the brake (5) is actuated to clamp the brake disc (12), the motor (7) is stopped, and the differences in tension force between the steel wire ropes at the two sides under extreme operating conditions of the drum (10) are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device (1) is adjusted, the loading cylinder is actuated, the drum (10) is loaded within the range of the wrap angle by utilizing the pulley block loading device (1), and testing whether there is any relative slip between the brake (5) and the brake disc (12), so as to judge whether the brake (5) can effectively brake the main shaft device in a static state; secondly, when dynamic braking testing is conducted, the brake (5) is actuated to clamp the brake disc (12), the motor (7) is stopped, and the differences in tension force between the steel wire ropes at the two sides under heavy-load operating conditions of the drum (10) are simulated; specifically, the oil pressure of the loading cylinder of the pulley block loading device (1) is adjusted, the loading cylinder is actuated, the drum (10) is loaded within the range of the wrap angle by utilizing the pulley block loading device (1), then the motor (7) is started, the brake (5) is released, and the motor (7) controls the drum (10) to start at an angular acceleration ai and reach a speed v; then the motor (7) is stopped, and the brake (5) is actuated; thus, testing whether the idle stoke time and braking deceleration of the brake are within allowable ranges, so as to judge whether the braking system can effectively brake the main shaft device in a dynamic state.
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| CN201811177243.7A CN109374325B (en) | 2018-10-10 | 2018-10-10 | Pulley blocks formula vertical shaft hoisting joint debugging test device and method |
| CN201811177243.7 | 2018-10-10 | ||
| PCT/CN2019/075871 WO2020073583A1 (en) | 2018-10-10 | 2019-02-22 | Pulley block type vertical well hoisting joint-test device and method |
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| AU2019356608B2 true AU2019356608B2 (en) | 2023-02-23 |
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| CN113551890B (en) * | 2021-06-17 | 2023-10-17 | 西安高压电器研究院股份有限公司 | High-voltage switch equipment terminal static mechanical load test device and test method |
| CN114318915B (en) * | 2021-12-06 | 2023-08-22 | 江苏大学 | Rear deformation device for multiple groups of steel wire ropes |
| CN114838856B (en) * | 2022-05-05 | 2024-03-22 | 西安左右成智能装备有限公司 | Test bench for leveling supporting leg supporting pressure test |
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| CN103940733A (en) * | 2014-04-21 | 2014-07-23 | 中国矿业大学 | Microslip testing platform for friction liner of elevator |
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| CN109374325B (en) | 2019-11-12 |
| AU2019356608A1 (en) | 2021-05-20 |
| WO2020073583A1 (en) | 2020-04-16 |
| CN109374325A (en) | 2019-02-22 |
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