Container end wire rope load balancing device for double self-driven permanent magnet outer rotor elevator

Abstract

The application provides a container end steel wire rope load balancing device of a double self-driving permanent magnet outer rotor elevator, and relates to the technical field of mine hoisting equipment. The device comprises a bearing frame, a left reversing mechanism, a right reversing mechanism and a hydraulic balancing mechanism. The bearing frame comprises a frame body and two rocker arm supports, and the bottom of the frame body is used for connecting a hoisting container. The left reversing mechanism comprises a left guide rail seat, a left sliding seat, a left reversing rocker arm and a left connecting rod. The right reversing mechanism comprises a right guide rail seat, a right sliding seat, a right reversing rocker arm and a right connecting rod. The hydraulic balancing mechanism is configured to provide damping adjustment, absorb impact energy and realize locking when the tension difference of the two sides of the steel wire rope exceeds the limit. The application takes into account the protection of the container end and the extension of the service life of the steel wire rope, reduces the long-term overload of one side of the steel wire rope and the relaxation impact of the other side of the steel wire rope through the slight differential correction of the effective working length of the container end, and reduces the fatigue damage of the steel wire rope.

Description

Technical Field

[0001] This invention relates to the field of mine hoisting equipment technology, and in particular to a load balancing device for the steel wire rope at the container end of a dual self-driving permanent magnet external rotor hoist. Background Technology

[0002] Mine hoisting systems are key equipment for safe coal mine production. Their core function is to safely and efficiently transport personnel, materials, or gangue within the mine shaft by using wire ropes to hoist containers (such as skips and cages). In recent years, to improve system efficiency and reliability, permanent magnet external rotor direct-drive hoists have gradually gained attention due to their advantages such as short transmission chains, high efficiency, and compact structure. In this type of design, the external rotor can directly function as a drum, while the inner stator is integrated into the main shaft or main shaft assembly, eliminating the need for traditional reducers and couplings and significantly simplifying the transmission structure.

[0003] To further improve system redundancy and fault tolerance, existing designs often arrange two permanent magnet external rotor hoists side by side, each independently pulling a steel wire rope, jointly suspending and lifting the same hoisting container. This dual-drive architecture can achieve low-speed takeover, smooth shutdown, or degraded operation through the drum end connection device when one hoist fails, its output capacity decreases, or maintenance is required, thereby ensuring the continuity and safety of downhole operations.

[0004] In realizing this invention, the prior art has at least the following problems: Under dual-rope hoisting conditions, due to factors such as differences in the elastic modulus of the wire ropes, errors in rope length, uneven wear, rope end installation deviations, and transient impact loads, the tension borne by each wire rope is difficult to maintain consistently. If the tension difference continues to widen, it will lead to tilting of the hoisting container, increased friction on the guide rails, and localized stress concentration. This not only accelerates fatigue damage to the wire ropes but may also cause severe vibrations or even loss of control during the fault-degraded operation phase, seriously threatening system safety. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art. Therefore, the purpose of this invention is to propose a load balancing device for the steel wire rope at the container end of a dual self-driven permanent magnet external rotor hoist, achieving micro-correction of the effective working length of the two steel wire ropes, adaptive tension balancing, impact vibration suppression, and hydraulic locking after the tension difference exceeds the limit.

[0006] To achieve the above objectives, this invention proposes a load balancing device for the steel wire rope at the container end of a dual self-driven permanent magnet external rotor hoist, comprising: The supporting frame includes a frame body and two rocker arm supports. The bottom of the frame body is used to connect to the lifting container, and the two rocker arm supports are respectively fixed to the left and right sides inside the frame body. The left reversing mechanism includes a left guide rail seat, a left slide seat, a left reversing rocker arm, and a left connecting rod; the left slide seat slides vertically with the left guide rail seat and is used to connect the left wire rope; the first end of the left reversing rocker arm is hinged to the rocker arm support on the left side; one end of the left connecting rod is connected to the left slide seat, and the other end is connected to the second end of the left reversing rocker arm, configured to convert the vertical motion of the left slide seat into the rotational motion of the left reversing rocker arm; The right reversing mechanism includes a right guide rail seat, a right slide block, a right reversing rocker arm, and a right connecting rod; the right slide block and the right guide rail seat slide in a vertical direction for connecting a right wire rope; the first end of the right reversing rocker arm is hinged to the rocker arm support on the right side; one end of the right connecting rod is connected to the right slide block, and the other end is connected to the second end of the right reversing rocker arm, configured to convert the vertical motion of the right slide block into the rotational motion of the right reversing rocker arm; The hydraulic balancing mechanism is connected to the left reversing rocker arm and the right reversing rocker arm at both ends, respectively. It is configured to provide damping adjustment, absorb impact energy, and lock when the tension difference exceeds the limit when the tension of the wire ropes on both sides is uneven.

[0007] According to one embodiment of the present invention, the frame body includes a left side plate, a right side plate, an upper beam, a lower beam, a front plate, a back plate, and an equipment mounting base; the left side plate and the right side plate are arranged opposite to each other, the upper beam and the lower beam are respectively connected to the upper and lower ends of the left side plate and the right side plate, the front plate and the back plate are respectively connected to the front and rear sides of the left side plate and the right side plate, and the equipment mounting base is installed through the lower beam, with the top for mounting the hydraulic balancing mechanism and the bottom for connecting the lifting container.

[0008] According to one embodiment of the present invention, the hydraulic balancing mechanism includes a left cylinder, a right cylinder, oil pipes, and an adjustable damping lock-up valve assembly; both the left and right cylinders are double piston rod cylinders; the left end of the piston rod of the left cylinder is hinged to the second end of the left reversing rocker arm, and the right end of the piston rod of the left cylinder is coaxially and fixedly connected to the left end of the piston rod of the right cylinder; the right end of the piston rod of the right cylinder is hinged to the second end of the right reversing rocker arm; the oil holes of the outer chambers of the left and right cylinders are connected to the adjustable damping lock-up valve assembly through the oil pipes.

[0009] According to one embodiment of the present invention, the left reversing mechanism further includes a left push-pull rod, and the right reversing mechanism further includes a right push-pull rod; one end of the left push-pull rod is hinged to the second end of the left reversing rocker arm, and the other end is hinged to the left end of the piston rod of the left hydraulic cylinder; one end of the right push-pull rod is hinged to the right end of the piston rod of the right hydraulic cylinder, and the other end is hinged to the second end of the right reversing rocker arm.

[0010] According to one embodiment of the present invention, the left reversing mechanism further includes a left fork lug, a left anti-torsion rotary joint, and a left force sensor; the right reversing mechanism further includes a right fork lug, a right anti-torsion rotary joint, and a right force sensor; the left anti-torsion rotary joint is sleeved on the bottom end of the left wire rope, the left fork lug is fixedly connected to the left slide block, and the lower end of the left anti-torsion rotary joint is connected to the left fork lug through the left force sensor; the right anti-torsion rotary joint is sleeved on the bottom end of the right wire rope, the right fork lug is fixedly connected to the right slide block, and the lower end of the right anti-torsion rotary joint is connected to the right fork lug through the right force sensor.

[0011] According to one embodiment of the present invention, a control unit is further included. The input terminal of the control unit is connected to the left force sensor and the right force sensor respectively, and the output terminal is electrically connected to the control terminal of the adjustable damping lock-up valve assembly. The control unit is configured to acquire the tension values ​​of the wire ropes on both sides in real time, calculate the difference, and output a control signal according to the magnitude and trend of the difference to adjust the valve opening of the adjustable damping lock-up valve assembly and dynamically adjust the damping characteristics of the hydraulic equalization mechanism.

[0012] According to one embodiment of the present invention, the system further includes a cylinder stroke sensor, an oil pressure sensor, an audible and visual alarm, and a button, all connected to the control unit. The cylinder stroke sensor is used to detect the piston rod stroke of the left cylinder and the piston rod stroke of the right cylinder, respectively. The oil pressure sensor is used to detect the internal oil pressure of the left and right cylinders, respectively. The control unit is further configured to determine the system operating status based on the signals from the cylinder stroke sensor and the oil pressure sensor, and to drive the audible and visual alarm to sound an alarm when the stroke exceeds the limit or the oil pressure is abnormal. The button is used to manually reset the adjustable damping lock-up valve assembly after it enters a locked state by closing the valve port due to excessive tension difference.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. According to the wire rope load balancing device of the present invention, by setting a reversing rocker arm, the lower end of the reversing rocker arm forms a cantilever lever, and a small vertical displacement of the slide can generate a large rotation angle at the upper end of the reversing rocker arm, so that the hydraulic balancing mechanism can detect the tension difference of the wire ropes on both sides earlier and more accurately, and effectively suppress the load imbalance.

[0014] 2. The hydraulic equalization mechanism of the present invention not only provides passive damping to absorb impact vibration, but also locks the valve group when the tension difference exceeds the limit to prevent the single rope from breaking due to overload.

[0015] 3. This invention takes into account both container end protection and extended wire rope life. By slightly differentially correcting the effective working length at the container end, it reduces long-term overload on one side of the wire rope and slack impact on the other side, thereby reducing wire rope fatigue damage.

[0016] 4. The control unit of the present invention dynamically adjusts the valve opening of the adjustable damping locking valve group according to the real-time tension difference, so that the damping characteristics of the hydraulic equalization mechanism adapt to the working conditions, and can better adapt to the normal working conditions of the dual external rotor motor, the performance degradation working conditions of the single external rotor motor, and the fault working conditions of the single external rotor motor.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein: Figure 1 This is a schematic diagram of the overall structure of the steel wire rope load balancing device at the container end of a dual self-driving permanent magnet external rotor hoist according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 A partially enlarged side view of the steel wire rope load balancing device.

[0020] Explanation of reference numerals in the attached figures: 11 is the left side plate; 12 is the right side plate; 13 is the upper beam; 14 is the lower beam; 15 is the equipment mounting base; 16 is the rocker arm support; 21 is the left guide rail seat; 22 is the left slide block; 23 is the left fork lug; 24 is the left reversing rocker arm; 25 is the left push-pull rod; 26 is the left connecting rod; 27 is the left anti-torsion rotary joint; 28 is the left force sensor; 31 is the right guide rail seat; 32 is the right slide block; 33 is the right fork lug; 34 is the right reversing rocker arm; 35 is the right push-pull rod; 36 is the right connecting rod; 37 is the right anti-torsion rotary joint; 38 is the right force sensor; 41 is the left oil cylinder; 42 is the right oil cylinder; 43 is the oil pipe; 44 is the adjustable damping lock valve assembly; 45 is the hydraulic accumulator; 5 is the control unit; 6 is the connecting seat; 7 is the lifting container. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the invention, and should not be construed as limiting the invention. Rather, embodiments of the invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0022] The following is for reference.Figure 1 and Figure 2 This invention describes a load balancing device for the steel wire rope at the container end of a dual self-driven permanent magnet external rotor hoist according to an embodiment of the present invention. In a specific application, two permanent magnet external rotor hoists are arranged side by side, each independently pulling a steel wire rope, which together suspends the load balancing device of this embodiment.

[0023] The container end wire rope load balancing device of the dual self-driven permanent magnet external rotor hoist according to an embodiment of the present invention includes a bearing frame, a left reversing mechanism, a right reversing mechanism, and a hydraulic balancing mechanism. The left lever reversing mechanism and the right lever reversing mechanism are symmetrically arranged along the left and right sides of the bearing frame.

[0024] The supporting frame includes a frame body and two rocker arm supports 16. The bottom of the frame body is used to connect the hoisting container 7, and the two rocker arm supports 16 are fixed to the left and right sides inside the frame body, respectively. The hoisting container includes a skip, cage, or other mine hoisting support container. The frame body is used to house the left reversing mechanism, the right reversing mechanism, and the hydraulic balancing mechanism. The frame body preferably adopts a box beam, welded plate structure, or high-strength lightweight structure to reduce the self-weight of the device and the occupation of the hoisting load.

[0025] The left reversing mechanism includes a left guide rail seat 21, a left slide seat 22, a left reversing rocker arm 24, and a left connecting rod 26. The left guide rail seat 21 is vertically positioned and fixed within the frame body. The left slide seat 22 slides vertically with the left guide rail seat 21 and is used to connect the left wire rope. The left rocker arm support 16 is located below the left slide seat 22. The first end of the left reversing rocker arm 24 is hinged to the left rocker arm support 16. One end of the left connecting rod 26 is connected to the left slide seat 22, and the other end is connected to the second end of the left reversing rocker arm 24, configured to convert the vertical movement of the left slide seat 22 into the rotational movement of the left reversing rocker arm 24.

[0026] The right reversing mechanism includes a right guide rail seat 31, a right slide 32, a right reversing rocker arm 34, and a right connecting rod 36. The right guide rail seat 31 is vertically positioned and fixed within the frame body. The right slide 32 slides vertically against the right guide rail seat 31 and is used to connect the right wire rope. The right rocker arm support 16 is located below the right slide 32. The first end of the right reversing rocker arm 34 is hinged to the right rocker arm support 16. One end of the right connecting rod 36 is connected to the right slide 32, and the other end is connected to the second end of the right reversing rocker arm 34, configured to convert the vertical movement of the right slide 32 into the rotational movement of the right reversing rocker arm 34.

[0027] The hydraulic balancing mechanism, connected at both ends to the left reversing rocker arm 24 and the right reversing rocker arm 34 respectively, is configured to provide damping adjustment, absorb impact energy, and lock when the tension difference exceeds the limit when the tension of the wire ropes on both sides is uneven. The hydraulic balancing mechanism can employ a combination of cylinders and valves. The cylinder can be a double-piston rod hydraulic cylinder, with its inlet and outlet ports connected to both ends of the valves via pipelines. The piston rod of the cylinder is connected at both ends to the left reversing rocker arm 24 and the right reversing rocker arm 34 respectively. Various types of tension sensors can be used for wire rope tension detection; the specific type is not limited.

[0028] The working principle of the wire rope load balancing device according to an embodiment of the present invention is as follows: When the tension of the wire rope on one side increases, the adjustment target is to release the high-tension side and tighten the low-tension side. Specifically, the slide of the high-tension side rope end undergoes a slight displacement relative to the bearing frame in the direction of increasing the equivalent working length of the wire rope on that side, causing the reversing rocker arm to rotate, which in turn causes the piston rod of the hydraulic cylinder to perform a push-pull action, causing the slide of the low-tension side rope end to undergo a slight displacement in the direction of decreasing the equivalent working length of the wire rope on that side. As a result, the tension on the high-tension side decreases, the tension on the low-tension side increases, and the tension on both sides gradually converges. The equivalent working length is defined as the distance from the lower end of the wire rope to the bottom of the frame body.

[0029] For example, under normal operating conditions of a dual external rotor motor, such as Figure 1 As shown, when the tension of the left wire rope is higher than that of the right wire rope, the lifting container 7 typically exhibits an upward tilt on the left and a downward tilt on the right. In this case, the left slide 22 should move slightly upward relative to the frame body, and the right slide 32 should move slightly downward relative to the frame body. It should be noted that the upward movement of the left slide 22 is relative to the supporting frame, and does not cause the left side of the lifting container 7 to continue rising. Because the lower end of the left wire rope moves upward relative to the frame body, the frame body and the left side of the lifting container 7 experience a slight downward sinking relative to the lower end of the left wire rope, which is equivalent to increasing the equivalent working length of the left wire rope, thereby reducing the tension on the left side. Conversely, the downward movement of the right slide 32 relative to the frame body is equivalent to reducing the equivalent working length of the right wire rope, thereby increasing the tension on the right side, causing the lifting container 7 to gradually approach horizontality from a left-high to a right-low position.

[0030] In some optional embodiments of the present invention, the frame body includes a left side plate 11, a right side plate 12, an upper beam 13, a lower beam 14, a front plate, a back plate, and an equipment mounting base 15. The left side plate 11 and the right side plate 12 are arranged opposite to each other. The upper beam 13 and the lower beam 14 are respectively connected to the upper and lower ends of the left side plate 11 and the right side plate 12. The front plate and the back plate are respectively connected to the front and rear sides of the left side plate 11 and the right side plate 12, together forming a high-rigidity closed load-bearing frame. The equipment mounting base 15 is installed through the lower beam 14, with its top for mounting a hydraulic balancing mechanism and its bottom for directly or indirectly connecting to the lifting container 7. In one example, a connecting seat 6 is also provided below the equipment mounting base 15, and the bottom of the connecting seat 6 is fixedly connected to the lifting container 7. The connecting seat 6 is reliably connected to the lifting container 7 by multiple high-strength bolts.

[0031] like Figure 1 As shown, the hydraulic balancing mechanism includes a left cylinder 41, a right cylinder 42, an oil pipe 43, and an adjustable damping lock-up valve assembly 44. Both the left cylinder 41 and the right cylinder 42 are double-piston rod cylinders. The left end of the piston rod of the left cylinder 41 is hinged to the second end of the left reversing rocker arm 24, and the right end of the piston rod of the left cylinder 41 is coaxially and fixedly connected to the left end of the piston rod of the right cylinder 42. The right end of the piston rod of the right cylinder 42 is hinged to the second end of the right reversing rocker arm 34. The oil holes in the outer chambers of the left cylinder 41 and the right cylinder 42 are connected to the adjustable damping lock-up valve assembly 44 via the oil pipe 43. The left cylinder 41 and the right cylinder 42 are equal-area double-rod hydraulic cylinders, with the cylinder bodies fixedly mounted on the equipment mounting base 15. The function of the two piston rods is to transmit the mechanical displacement generated by the left reversing rocker arm 24 and the right reversing rocker arm 34 to the corresponding cylinders. The advantage of using dual cylinders is that they can sense the load status on the left and right sides separately, resulting in a more direct response and higher sensitivity. When the cylinder stroke, the tension difference of the wire ropes on both sides, or the differential speed exceeds a preset threshold, the adjustable damping lock-up valve assembly 44 locks the oil circuit inside the oil pipe 43, causing the left cylinder 41 and the right cylinder 42 to stop compensating. In one example, the hydraulic balancing mechanism also includes a hydraulic accumulator 45, which is connected to the oil pipe 43 to compensate for temperature rise, micro-leakage, and small-range volume fluctuations.

[0032] The adjustable damping lock-up valve assembly 44 is preferably an integrated hydraulic valve block, internally integrating an electro-proportional throttle valve, a two-way hydraulic lock, a solenoid directional valve, a relief valve, a manual pressure relief and reset valve, and a pressure detection interface. The electro-proportional throttle valve is used to continuously adjust the oil flow resistance; the two-way hydraulic lock is used to lock the oil circuit when the tension difference exceeds the limit; the solenoid directional valve is used to switch the locking or releasing control oil circuit of the two-way hydraulic lock; the relief valve is used to limit abnormal pressure peaks; the manual pressure relief and reset valve is used for manual pressure relief, unlocking, or reconnection after troubleshooting; and the pressure detection interface is used to collect oil circuit pressure signals.

[0033] To improve the force angle of the piston rod, the left reversing mechanism also includes a left push-pull rod 25, and the right reversing mechanism also includes a right push-pull rod 35. One end of the left push-pull rod 25 is hinged to the second end of the left reversing rocker arm 24, and the other end is hinged to the left end of the piston rod of the left cylinder 41. One end of the right push-pull rod 35 is hinged to the right end of the piston rod of the right cylinder 42, and the other end is hinged to the second end of the right reversing rocker arm 34.

[0034] Combination Figure 1 and Figure 2 As shown, in some optional embodiments of the present invention, the left reversing mechanism further includes a left fork lug 23, a left anti-torsion rotary joint 27, and a left force sensor 28; the right reversing mechanism further includes a right fork lug 33, a right anti-torsion rotary joint 37, and a right force sensor 38. The left anti-torsion rotary joint 27 is sleeved on the bottom end of the left wire rope, and the left fork lug 23 is fixedly connected to the left slide block 22. The lower end of the left anti-torsion rotary joint 27 is connected to the left fork lug 23 via the left force sensor 28. The right anti-torsion rotary joint 37 is sleeved on the bottom end of the right wire rope, and the right fork lug 33 is fixedly connected to the right slide block 32. The lower end of the right anti-torsion rotary joint 37 is connected to the right fork lug 33 via the right force sensor 38. Both the left and right anti-torsion rotary joints 27 and 37 are pin-type and are used to measure the tension of the left and right wire ropes, respectively.

[0035] The load balancing device for the steel wire rope at the container end of the dual self-driven permanent magnet external rotor hoist also includes a control unit 5. The input end of the control unit 5 is connected to the left force sensor 28 and the right force sensor 38, respectively, and the output end is electrically connected to the control end of the adjustable damping lock valve assembly 44. The control unit 5 is configured to acquire the tension values ​​of the steel wire ropes on both sides in real time, calculate the difference, and output a control signal to adjust the valve opening of the adjustable damping lock valve assembly 44 according to the magnitude and trend of the difference, thereby dynamically adjusting the damping characteristics of the hydraulic balancing mechanism.

[0036] In some optional embodiments, the load balancing device for the wire rope at the container end of the dual self-driven permanent magnet external rotor hoist also includes a cylinder stroke sensor, an oil pressure sensor, an audible and visual alarm, and a button, all connected to the control unit 5. The cylinder stroke sensor detects the piston rod stroke of the left cylinder 41 and the piston rod stroke of the right cylinder 42, respectively. The oil pressure sensor detects the internal oil pressure of the left cylinder 41 and the right cylinder 42, respectively. The control unit 5 is also configured to determine the system's operating status based on the signals from the cylinder stroke sensor and the oil pressure sensor, and to activate the audible and visual alarm when the stroke exceeds the limit or the oil pressure is abnormal. The button is used for manual reset after the adjustable damping locking valve assembly 44 closes its valve port and enters a locked state due to excessive tension difference, restoring the wire rope load balancing device's compensation function.

[0037] The following is a further description of the working process of the wire rope load balancing device in a specific embodiment of the present invention.

[0038] I. Normal operating conditions of a dual external rotor motor: When both double external rotor motors are working normally, if the tension of one wire rope is slightly higher than that of the other wire rope due to wire rope length error, manufacturing error, wear difference or transient load, a small amount of compensation is made through the left and right reversing mechanism, left oil cylinder 41, right oil cylinder 42 and oil pipe 43, so that the tension of the two wire ropes gradually tends to be the same.

[0039] Assuming that the tension of the left wire rope is higher than that of the right wire rope, the upward movement of the left slide block 22 drives the left reversing rocker arm 24 to rotate around the left rocker arm support 16 via the left connecting rod 26. The left reversing rocker arm 24 drives the left push-pull rod 25 to move, and produces a corresponding translation through the piston rod of the left cylinder 41. The piston rod of the right cylinder 42 then drives the right push-pull rod 35 and the right reversing rocker arm 34 to adjust the right slide block 32 in the opposite direction. Under normal dual-machine operating conditions, the valve port of the adjustable damping lock valve assembly 44 remains in a throttling state.

[0040] During the compensation process described above, the rope head slide corresponding to the high-tension side wire rope undergoes a slight displacement along the direction of releasing the equivalent working length of that side, and the rope head slide corresponding to the low-tension side wire rope undergoes a slight displacement along the direction of reducing the equivalent working length of that side. This results in a decrease in tension on the high-tension side and an increase in tension on the low-tension side, causing the tension of the two wire ropes to gradually converge.

[0041] II. Performance degradation conditions of a single external rotor motor: When the output capacity of an external rotor motor decreases but has not completely failed, the control unit 5 controls the adjustable damping locking valve group 44 to reduce the valve opening or increase the damping level based on the output speed of the external rotor on one side and the tension difference of the wire ropes on both sides, so as to suppress the rapid alternating swing, repeated rope slippage or impact vibration of the lifting container 7 and keep the system running smoothly.

[0042] III. Fault conditions of a single external rotor motor: When one of the external rotor motors malfunctions and cannot rotate, the control unit 5, based on the output speed of the external rotor on one side and the tension difference between the two wire ropes, controls the adjustable damping lock-up valve assembly 44 to further reduce the valve opening or enter a high-damping state, while continuously monitoring the piston rod stroke, the tension difference between the two wire ropes, and the oil circuit pressure. If the piston rod stroke, the tension difference between the two wire ropes, and the oil circuit pressure reach the set threshold, the adjustable damping lock-up valve assembly 44 closes the valve and enters the lock-up state, and the left cylinder 41 and the right cylinder 42 stop operating, constraining the relative compensation amount of the two wire ropes within a safe range. This prevents continuous overload of one side of the wire rope or excessive slack of the other side, ensuring the stability of the lifting container 7 and system safety during the fault degradation process.

[0043] After the lock-up occurs, the audible and visual alarm will sound. After confirming that the fault has been eliminated and the lifting system is in a safe state, the operator can manually unlock the system by inputting a reset confirmation and resetting the adjustable damping lock-up valve group 44, so that the oil pipe and oil circuit can be restored to controllable connection.

[0044] It should be noted that in the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A load balancing device for the steel wire rope at the container end of a dual self-driven permanent magnet external rotor hoist, characterized in that, include: The supporting frame includes a frame body and two rocker arm supports (16). The bottom of the frame body is used to connect the lifting container (7). The two rocker arm supports (16) are respectively fixed to the left and right sides inside the frame body. The left reversing mechanism includes a left guide rail seat (21), a left slide seat (22), a left reversing rocker arm (24), and a left connecting rod (26); the left slide seat (22) slides vertically with the left guide rail seat (21) and is used to connect the left wire rope; the first end of the left reversing rocker arm (24) is hinged to the rocker arm support (16) on the left side; one end of the left connecting rod (26) is connected to the left slide seat (22), and the other end is connected to the second end of the left reversing rocker arm (24), configured to convert the vertical movement of the left slide seat (22) into the rotational movement of the left reversing rocker arm (24); The right reversing mechanism includes a right guide rail seat (31), a right slide seat (32), a right reversing rocker arm (34), and a right connecting rod (36); the right slide seat (32) slides vertically with the right guide rail seat (31) and is used to connect the right wire rope; the first end of the right reversing rocker arm (34) is hinged to the rocker arm support (16) on the right side; one end of the right connecting rod (36) is connected to the right slide seat (32), and the other end is connected to the second end of the right reversing rocker arm (34), configured to convert the vertical motion of the right slide seat (32) into the rotational motion of the right reversing rocker arm (34); The hydraulic equalization mechanism is connected to the left reversing rocker arm (24) and the right reversing rocker arm (34) at both ends, respectively. It is configured to provide damping adjustment, absorb impact energy and lock when the tension difference exceeds the limit when the tension of the wire ropes on both sides is uneven.

2. The container end wire rope load balancing device of the dual self-driven permanent magnet external rotor hoist according to claim 1, characterized in that, The frame body includes a left side plate (11), a right side plate (12), an upper beam (13), a lower beam (14), a front plate, a back plate, and an equipment mounting base (15). The left side plate (11) and the right side plate (12) are arranged opposite to each other. The upper beam (13) and the lower beam (14) are respectively connected to the upper and lower ends of the left side plate (11) and the right side plate (12). The front plate and the back plate are respectively connected to the front and rear sides of the left side plate (11) and the right side plate (12). The equipment mounting base (15) is installed through the lower beam (14). The top is used to install the hydraulic balancing mechanism, and the bottom is used to connect the lifting container (7).

3. The container end wire rope load balancing device for the dual self-driven permanent magnet external rotor hoist according to claim 1, characterized in that, The hydraulic balancing mechanism includes a left cylinder (41), a right cylinder (42), an oil pipe (43), and an adjustable damping lock-up valve assembly (44); both the left cylinder (41) and the right cylinder (42) are double piston rod cylinders; the left end of the piston rod of the left cylinder (41) is hinged to the second end of the left reversing rocker arm (24), and the right end of the piston rod of the left cylinder (41) is coaxially and fixedly connected to the left end of the piston rod of the right cylinder (42); the right end of the piston rod of the right cylinder (42) is hinged to the second end of the right reversing rocker arm (34); the oil holes of the outer chambers of the left cylinder (41) and the right cylinder (42) are connected to the adjustable damping lock-up valve assembly (44) through the oil pipe (43).

4. The container end wire rope load balancing device of the dual self-driven permanent magnet external rotor hoist according to claim 3, characterized in that, The left reversing mechanism also includes a left push-pull rod (25), and the right reversing mechanism also includes a right push-pull rod (35); one end of the left push-pull rod (25) is hinged to the second end of the left reversing rocker arm (24), and the other end is hinged to the left end of the piston rod of the left oil cylinder (41); one end of the right push-pull rod (35) is hinged to the right end of the piston rod of the right oil cylinder (42), and the other end is hinged to the second end of the right reversing rocker arm (34).

5. The container end wire rope load balancing device for the dual self-driven permanent magnet external rotor hoist according to claim 3, characterized in that, The left reversing mechanism also includes a left fork lug (23), a left anti-torsion rotary joint (27), and a left force sensor (28). The right reversing mechanism also includes a right fork lug (33), a right anti-torsion rotary joint (37), and a right force sensor (38). The left anti-torsion rotary joint (27) is sleeved on the bottom end of the left wire rope. The left fork lug (23) is fixedly connected to the left slide block (22). The lower end of the left anti-torsion rotary joint (27) is connected to the left fork lug (23) through the left force sensor (28). The right anti-torsion rotary joint (37) is sleeved on the bottom end of the right wire rope. The right fork lug (33) is fixedly connected to the right slide block (32). The lower end of the right anti-torsion rotary joint (37) is connected to the right fork lug (33) through the right force sensor (38).

6. The container end wire rope load balancing device of the dual self-driven permanent magnet external rotor hoist according to claim 5, characterized in that, It also includes a control unit (5), whose input end is connected to the left force sensor (28) and the right force sensor (38) respectively, and whose output end is electrically connected to the control end of the adjustable damping lock valve group (44); the control unit (5) is configured to acquire the tension values ​​of the steel wire ropes on both sides in real time, calculate the difference, and output a control signal according to the magnitude and trend of the difference to adjust the valve opening of the adjustable damping lock valve group (44) and dynamically adjust the damping characteristics of the hydraulic equalization mechanism.

7. The container end wire rope load balancing device for the dual self-driven permanent magnet external rotor hoist according to claim 6, characterized in that, It also includes a cylinder stroke sensor, an oil pressure sensor, an audible and visual alarm, and a button, all connected to the control unit (5); the cylinder stroke sensor is used to detect the piston rod stroke of the left cylinder (41) and the piston rod stroke of the right cylinder (42) respectively; the oil pressure sensor is used to detect the internal oil pressure of the left cylinder (41) and the right cylinder (42) respectively; the control unit (5) is also configured to determine the system working status based on the signals of the cylinder stroke sensor and the oil pressure sensor, and drive the audible and visual alarm to issue an alarm when the stroke exceeds the limit or the oil pressure is abnormal; the button is used to manually reset the adjustable damping lock valve group (44) after it closes the valve port and enters the lock state due to the tension difference exceeding the limit.

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