Elevator flexible body sway suppression device

Abstract

The application discloses an elevator flexible body swing suppression device, which comprises a mass body, a driving component and a first controller. The driving component is fixed on the mass body and drives the mass body to slide up and down along the flexible body in the shaft. The first controller controls the driving component so that the mass body is located at the intersection of the swing region and the safety region of the elevator flexible body. The swing region refers to the part of the elevator flexible body which deviates from the static position when not swinging due to the swing. The safety region refers to the part of the elevator flexible body which is greater than the preset safety distance between the end of the elevator flexible body and the elevator component directly contacting with the elevator flexible body. The elevator flexible body swing suppression device can move to the swing region on the flexible body, dynamically adapt to the changing swing region in the elevator operation, and achieve better swing suppression effect.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and more specifically to an elevator flexible body sway suppression device. Background Technology

[0002] During elevator operation, the building will sway to some extent due to earthquakes or strong winds. This swaying, combined with airflow within the shaft, will cause the elevator's flexible components (such as the steel cables / belts suspending the elevator car, compensating chains, and traveling cables, hereinafter collectively referred to as flexible components) to sway horizontally. This swaying may cause damage to the flexible components themselves or the objects they collide with due to collisions or entanglement with equipment in the shaft, and may even endanger the elevator's operational safety. Therefore, it is necessary to monitor and suppress the swaying of the elevator's flexible components.

[0003] Currently, a common method for suppressing the swaying of flexible elevator components is to detect the swaying of the component and then use a controller to control the actuator based on the detection results, thereby suppressing the swaying. For example:

[0004] The cable damping device provided in document 1 (CN201980101833.8) can suppress the displacement instability of the elevator cable by amplifying the displacement with a negative restoring force. The damping device (21) has a first displacement measuring unit, a first displacement amplifier, and a control unit (24). The first displacement measuring unit measures the lateral displacement of the cable body centered on the equilibrium position (20) at a first position (P1) in the length direction of the cable body of the elevator (1). The first displacement amplifier applies a negative restoring force to the cable body to amplify the displacement of the cable body. The control unit (24) applies a negative restoring force smaller than the positive restoring force to the first displacement amplifier based on the displacement measured by the first displacement measuring unit. The positive restoring force is the force that returns the cable body to the equilibrium position (20).

[0005] The elevator system provided in document 2 (CN201080068334.2) includes: a first mass movable within a shaft; a second mass movable within the shaft; a plurality of elongated members coupling the first mass to the second mass; at least one damper selectively contacting the at least one of the elongated members in response to lateral movement of the at least one of the elongated members; and a sensor detecting the contact between the damper and the at least one of the elongated members, wherein the sensor provides detected contact between the damper and the at least one of the elongated members. The controller, in response to detected contact, controls at least one aspect of elevator system operation, wherein the controller selects said at least one aspect of elevator system operation for adjustment based on the magnitude of the indication from said sensor, said at least one aspect including at least one of: limiting the length of elevator travel to the upper or lower platform of the shaft; moving the elevator car to a designated position within the shaft that is considered advantageous during a swaying condition; causing the elevator car to proceed to the nearest platform and causing the elevator car doors to open to allow passengers to exit the elevator car.

[0006] The vibration damping devices or dampers in the aforementioned existing technical solutions are all located near the constraint parts of the flexible body, such as near the flexible body drive wheel or anti-cord sheave. However, the locations where the flexible body sways significantly are mostly located in the middle between the constraint parts at both ends of the flexible body, and vary depending on the position of the car. Therefore, the aforementioned existing technical solutions have limited effectiveness in suppressing the sway of the flexible body, especially for elevators with long flexible bodies and high lifting heights.

[0007] Therefore, how to provide a technology solution for suppressing the swaying of the elevator flexible body that can dynamically adapt to the changes in the swaying parts of the flexible body when the car is in different positions has become a technical problem to be solved. Summary of the Invention

[0008] To address the aforementioned technical problems, this invention discloses an elevator flexible body sway suppression device, comprising a mass body, a driving component, and a first controller; the driving component is fixed to the mass body, driving the mass body to slide up and down along the flexible body in the shaft; the first controller controls the driving component, such that the mass body is located at the intersection of the swaying region and the safe region of the elevator flexible body; the swaying region refers to the portion of the elevator flexible body that deviates from its stationary position when it is not swaying due to swaying, and the safe region refers to the portion of the elevator flexible body that is greater than a preset safe distance from the end of the elevator flexible body and from elevator components that are in direct contact with the elevator flexible body.

[0009] Preferably, the first controller controls the driving component according to the following rules: when the mass body moves away from the stationary position where the elevator flexible body is not swaying along with it, the first controller controls the driving component to make the mass body slide towards the point where the swaying amplitude of the elevator flexible body is the maximum; when the mass body moves closer to the stationary position of the elevator flexible body along with it, the first controller controls the driving component to make the mass body slide away from the point where the swaying amplitude of the elevator flexible body is the maximum.

[0010] Preferably, the ratio α of the linear density of the sway suppression device along the length of the flexible body to the linear density of the elevator flexible body satisfies min≤α≤max, or the ratio β of the mass of the sway suppression device to the mass of the flexible body of a preset length satisfies min≤β≤max, where min and max are both positive real numbers; the preset length refers to the effective length by which the sway suppression device limits the bending deformation of the flexible body.

[0011] Preferably, the driving component includes a first pressing member and a second pressing member, the first pressing member and the second pressing member having a first edge and a second edge respectively, and when the first edge and the second edge are combined, they form a central hole. The shape of the central hole matches the cross-sectional shape of the elevator flexible body, so that when the first pressing member and the second pressing member approach each other in such a way that the central hole is formed by the first edge and the second edge facing each other, the central hole can accommodate the elevator flexible body.

[0012] Preferably, the driving component further includes an elastic member, which is connected to the first pressing member and the second pressing member respectively, such that the pressure applied by the first pressing member and the second pressing member to the elevator flexible body is not less than a pressure threshold, and the coefficient of friction between the contact portion of the first pressing member and the second pressing member and the flexible body is such that when the pressure is not less than the pressure threshold, the first pressing member and the second pressing member and the flexible body only have rolling friction and no sliding friction.

[0013] Preferably, the first clamping member and the second clamping member are cylindrical rollers, and the shape of one side of the cross section of the cylindrical roller along the straight line containing its center is half of the central hole.

[0014] Preferably, the first controller controls the sliding of the mass body by controlling the rolling of at least one of the first and second clamping members.

[0015] Preferably, the swaying area is determined using the building's swaying information and elevator operation information, based on a pre-established elevator flexible body swaying model.

[0016] Preferably, the sway suppression device further includes: a sway detection component for detecting the swaying of the mass body in the elevator flexible body; the first controller controls the drive component based on the detection result of the sway detection component.

[0017] Preferably, the first controller controls the mass body to be positioned such that the distance between the mass body and the position of maximum sway does not exceed a threshold within the swaying region.

[0018] Preferably, the method by which the first controller determines the position of maximum shaking based on the detection result of the shaking detection component is as follows:

[0019] Step A1: Control the drive component to move a preset amount of movement in the first direction;

[0020] Step A2: Detect the sway at the new position. If the sway at the new position is greater than the sway before the move, keep the new position and return to step A1 until the sway at the new position is less than the sway before the most recent move. Take the position before the most recent move as the first position with the greatest sway.

[0021] Step A3: Control the drive component to move in the second direction by a preset amount of movement;

[0022] Step A4: Detect the sway at the new position. If the sway at the new position is greater than the sway before the move, keep the new position and return to step A3 until the sway at the new position is less than the sway before the most recent move. Take the position before the most recent move as the second position with the greatest sway.

[0023] Step A5: Select the position with the larger sway between the first maximum sway position and the second maximum sway position as the maximum sway position and output it.

[0024] Preferably, the sway detection component includes a distance sensor, which determines the sway of the mass body in the elevator flexible body based on the measured distance between the sensor and the shaft wall.

[0025] Preferably, there are two ranging sensors, and the ranging directions are perpendicular to each other in the horizontal direction.

[0026] Preferably, the sway detection component includes a sensor for measuring the deviation angle or attitude of the mass relative to the vertical direction, and the sway detection component determines the sway of the mass in the elevator flexible body based on the detection results of the sensor.

[0027] Preferably, the sway suppression device further includes a sway suppression component and a second controller. The second controller controls the sway suppression component based on the detection result of the sway detection component, so that air exerts a force on the sway suppression component, which is used to suppress the swaying of the elevator's flexible body.

[0028] Preferably, the second controller determines the swaying direction and amplitude of the elevator flexible body based on the detection results of the sway detection component, determines the direction and magnitude of the force required to suppress the swaying of the elevator flexible body, and controls the sway suppression component accordingly to generate the force required to suppress the swaying of the elevator flexible body.

[0029] Preferably, the second controller uses the sway amplitude of the elevator flexible body as the controlled variable to perform closed-loop control on the sway of the elevator flexible body. That is, the desired sway amplitude of the elevator flexible body is used as a controllable input, the difference between the desired sway amplitude and the actual sway amplitude of the elevator flexible body is calculated, and the difference is sent as an input to the sway suppression component, which generates the control command required to suppress the actual sway amplitude of the elevator flexible body.

[0030] Preferably, the sway suppression component is a fan, and the second controller can change the airflow direction by changing the rotation direction of the fan blades, thereby changing the direction of the force required to suppress the sway of the elevator flexible body.

[0031] Preferably, the sway suppression components include two components, and the directions of the forces they generate to suppress the swaying of the elevator flexible body are perpendicular to each other in the horizontal direction.

[0032] Preferably, the distance between the two sway suppression components in the vertical direction is not less than a distance threshold.

[0033] Preferably, the sway suppression device further includes an energy storage device that provides the required energy to the energy-consuming components in the sway suppression device, the energy storage device receiving energy from the outside in a wired or wireless manner.

[0034] Preferably, when the charging conditions are met, the first controller controls the sway suppression device to slide near the elevator car so as to receive charging from the elevator car.

[0035] Preferably, the charging conditions include: the remaining energy of the energy storage device is below a threshold.

[0036] Preferably, the charging conditions also include: the amplitude of the flexible body swaying is less than a threshold and / or there are no passengers in the car or the elevator is in an idle state.

[0037] Preferably, the sway suppression device further includes a communication unit for establishing communication between the sway suppression device and the elevator shaft. When the charging conditions are met or the sway suppression device has reached the charging position near the elevator car, communication is established in the elevator shaft so as to activate the wireless charging transmitter located in the elevator car to charge the wireless charging receiver of the energy storage device located in the sway suppression device.

[0038] Beneficial technical effects

[0039] Compared with the prior art, the elevator flexible body sway suppression device of the present invention can move on the flexible body to the swaying area, dynamically adapt to the changing swaying area during elevator operation, and achieve a better sway suppression effect; at the same time, the elevator flexible body sway suppression device of the present invention is attached to the flexible body, does not require external support, and will not interfere with the operation of the car or counterweight. Attached Figure Description

[0040] Figure 1 Examples of the structures of the two elevator systems in Example 1, and examples of the placement of the elevator flexible body sway suppression device in the elevator system in Example 1;

[0041] Figure 2 This is a schematic diagram of the elevator flexible body sway suppression device in Example 2;

[0042] Figure 3 This is a schematic diagram of the elevator flexible body sway suppression device in Example 3. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention. It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0044] Example 1

[0045] This embodiment provides an elevator flexible body sway suppression device, including a mass body, a driving component, and a first controller; the driving component is fixed on the mass body and drives the mass body to slide up and down along the flexible body in the shaft.

[0046] The first controller controls the drive component so that the mass body is located at the intersection of the swaying region and the safe region of the elevator flexible body; the swaying region refers to the part of the elevator flexible body that deviates from its stationary position when it is not swaying due to swaying, and the safe region refers to the part of the elevator flexible body that is greater than a preset safe distance from the end of the elevator flexible body and the elevator components that are in direct contact with the elevator flexible body.

[0047] When the elevator car (especially for medium- and high-speed elevators with large lifting heights) moves up and down in the shaft, and especially when the building where the elevator is located sways due to factors such as strong winds, the flexible parts in the elevator system (such as the steel wire ropes used to suspend the car and counterweight, the traveling cable, the compensating cable, etc.) will sway to varying degrees. The location, range and amplitude of the swaying are closely related to a variety of factors such as the car position, the car speed, the airflow in the shaft, and the swaying of the building.

[0048] Figure 1 Two exemplary elevator systems are shown in the diagram. Figure 1 In the elevator system shown in diagram a, the upper parts of the car 5 and counterweight 6 are suspended from the drive wheel 8 and guide wheel 10 by suspension rope 3. A traveling cable fixing device 7, used to fix the traveling cable 4 to the shaft wall in the middle of the shaft, is connected to the car 5. The traveling cable 4 is used to transmit power and electrical signals. A compensating cable 2 is connected to the lower parts of the car 5 and counterweight 6. The compensating cable 2 is used to compensate for the mass difference of the suspension rope 3 on the car side and the counterweight side. The compensating cable 2 is tensioned and guided by a tensioning wheel 9 (this is commonly used in medium and high-speed elevators). The suspension rope 3, traveling cable 4, and compensating cable 2 are collectively referred to as flexible bodies. Figure 1 The elevator system shown in b is Figure 1 The difference in elevator system A is that the compensating cable 2 hangs down naturally and is not tensioned by the tensioning wheel 9 (this is usually the case in low-speed elevators).

[0049] for Figure 1 The suspension rope 3 in section a may actually sway at any position and range in the portion between the drive wheel 8 and the car, and in the portion between the guide wheel 10 and the counterweight 6. That is, the swaying area can be any length of the portion between the drive wheel 8 and the car and / or any length of the portion between the guide wheel 10 and the counterweight 6. Therefore, its possible swaying area is the sum of the portions of the suspension rope 3 between the drive wheel 8 and the car and the portion between the guide wheel 10 and the counterweight 6. For the portion of the suspension rope 3 between the drive wheel 8 and the car, its safe area is the remaining portion after removing the portion from the drive wheel 8 to the safe distance from the drive wheel 8 and the portion from the car 5 to the safe distance from the car 5, respectively. Similarly, the safe area of ​​the portion of the suspension rope 3 between the guide wheel 10 and the counterweight 6 can be determined. Figure 1 The method for determining the possible swaying area and safe area of ​​the compensation cable 2 in section a is the same as... Figure 1 The suspension rope 3 in a is the same.

[0050] for Figure 1The compensating cable 2 in b, since its actual sway may occur at any position and range of the entire compensating cable 2 located at the lower part of the counterweight and the lower part of the car, that is, the swaying area can be any length of the compensating cable 2 located between the counterweight 6 and the car 5, its possible swaying area is the entire compensating cable 2 located between the counterweight 6 and the car 5; its safe area is the remaining part after removing a section of safe distance from each of the two ends of the compensating cable 2. Figure 1 The method for determining the possible swaying area and safe area of ​​the accompanying cable 4 in b is the same as... Figure 1 The compensation cable 2 in b is the same.

[0051] As can be seen from the above analysis, the actual swaying area of ​​the elevator's flexible body must be part of its potential swaying area. Theoretically, the intersection of the swaying area and the safe area may be empty or non-empty. The swaying area may (truly) contain the safe area, or the safe area may (truly) contain the swaying area.

[0052] Figure 1 c Figure 1 Taking the elevator system shown in Figure b as an example, the installation position of the elevator flexible body sway suppression device 1 in the elevator according to this embodiment is illustrated. Figure 1 c indicates the approximate location of the possible swaying area. For example, the possible swaying area of ​​the suspension rope 3 in the entire elevator system can be divided into two areas: one is located between the car 5 and the drive wheel 8, and the other is located between the counterweight 6 and the guide wheel 10. The sway suppression device 1 is set in these two possible swaying areas respectively to suppress the swaying that occurs in their respective possible swaying areas (Note: the swaying area refers to the area where the flexible body deviates from the stationary area of ​​the flexible body when there is no swaying caused by a certain actual swaying).

[0053] Without the tensioning pulley 9, the actual swaying of the compensating cable 2 can occur at any position and range within the entire compensating cable 2 located below the counterweight and below the car. That is, the swaying area can be any length of the compensating cable 2 between the counterweight 6 and the car 5, so its possible swaying area is the entire compensating cable 2 between the counterweight 6 and the car 5. For a possible swaying area, one sway suppression device 1 can be installed, or multiple devices can be installed. However, if for a continuous swaying area, according to the swaying model, multiple S-shaped sway bends may occur, in order to suppress multiple sway bends simultaneously, multiple sway suppression devices 1 can be installed according to the number of sway bends. The method for determining the possible swaying area of ​​the traveling cable 4 is the same as that for the compensating cable 2, and the installation of the sway suppression device 1 is also the same as that for the compensating cable 2.

[0054] Figure 1Figure c also shows a schematic diagram of the compensating cable 2 when it deviates from its stationary position without swaying. At this time, the mass of the sway suppression device 1 slides towards the position with a larger sway amplitude.

[0055] Furthermore, corresponding sway suppression devices 1 can be installed in two vertical sections of both the traveling cable and the compensating cable to suppress swaying in each vertical section. In this case, the sway suppression device 1 is only responsible for suppressing the swaying of its own vertical section and will not move from one vertical section to another.

[0056] As can be seen from the above description, the sway suppression device has a certain mass. Under the action of gravity, when it moves away from the stationary position (horizontal direction) when the flexible body is swaying, it will play a damping role similar to a damper, thus suppressing the swaying of the flexible body.

[0057] Considering that the sway suppression device uses its own mass to generate damping to suppress the swaying of the flexible body, the mass of the sway suppression device needs to meet certain conditions. It's easy to understand that if the mass is too small, it will be difficult to achieve a damping effect, but if the mass is too large, it will place higher demands on the tensile strength and other properties of the flexible body (in addition, when the mass is too large, although swaying will no longer occur at the location of the sway suppression device, new swaying will occur in the flexible body located between the sway suppression device and the car or counterweight). To solve this problem, the following limitations are made on the sway suppression device (mass or linear density):

[0058] The ratio α of the linear density of the sway suppression device along the length of the flexible body to the linear density of the elevator flexible body satisfies min≤α≤max, or the ratio β of the mass of the sway suppression device to the mass of the flexible body of a preset length satisfies min≤β≤max, where min and max are both positive real numbers; the preset length refers to the effective length by which the sway suppression device limits the bending deformation of the flexible body.

[0059] As explained above, to ensure the optimal sway suppression effect of the sway suppression device on the flexible body, it is best to keep the sway suppression device within both the swaying area and the safe area. The safe area can be predetermined based on the position and arrangement of the flexible body within the elevator system. However, the swaying area varies with changes in the swaying of the building, the car's position, airflow in the shaft, and the car's speed. Therefore, the swaying area can be determined by detecting the actual swaying of the flexible body using a sway detection device. Alternatively, a swaying model can be pre-established between the swaying influencing factors of the flexible body (such as the swaying and structure of the building, the car's position, and its speed) and the swaying area of ​​the flexible body. Then, based on the actual values ​​of these influencing factors and the pre-established swaying model, the swaying area of ​​the elevator flexible body can be determined.

[0060] In this embodiment, the mass of the sway suppression device 1 is moved to the swaying area of ​​the elevator flexible body, especially the position where the swaying amplitude is large. The mass of the device generates a damping effect on the swaying of the flexible body, thereby reducing the swaying amplitude of the flexible body.

[0061] Example 2

[0062] This embodiment further defines and explains the embodiments based on Embodiment 1.

[0063] The first controller controls the driving component according to the following rules: when the mass body moves away from the stationary position where the elevator flexible body is not swaying along with it, the first controller controls the driving component to make the mass body slide towards the point where the swaying amplitude of the elevator flexible body is the maximum; when the mass body moves closer to the stationary position of the elevator flexible body along with it, the first controller controls the driving component to make the mass body slide away from the point where the swaying amplitude of the elevator flexible body is the maximum.

[0064] The sway suppression device further includes a sway detection component for detecting the swaying of the mass 15 in the elevator flexible body 2; the first controller controls the drive component based on the detection result of the sway detection component. The first controller controls the mass 15 to be positioned such that the distance between the mass 15 and the maximum swaying position in its swaying region does not exceed a threshold.

[0065] The method by which the first controller determines the position of maximum shaking based on the detection results of the shaking detection component is as follows:

[0066] Step A1: Control the drive component to move a preset amount of movement in the first direction;

[0067] Step A2: Detect the sway at the new position. If the sway at the new position is greater than the sway before the move, keep the new position and return to step A1 until the sway at the new position is less than the sway before the most recent move. Take the position before the most recent move as the first position with the greatest sway.

[0068] Step A3: Control the drive component to move in the second direction by a preset amount of movement;

[0069] Step A4: Detect the sway at the new position. If the sway at the new position is greater than the sway before the move, keep the new position and return to step A3 until the sway at the new position is less than the sway before the most recent move. Take the position before the most recent move as the second position with the greatest sway.

[0070] Step A5: Select the position with the larger sway between the first maximum sway position and the second maximum sway position as the maximum sway position and output it.

[0071] The sway detection component is equipped with distance sensors, which determine the sway of the mass within the elevator's flexible structure based on the measured distance between the sensors and the shaft wall. There are two distance sensors, and their measuring directions are perpendicular to each other in the horizontal plane.

[0072] Alternatively, the sway detection component may be equipped with a sensor (such as a gyroscope, IMU, etc.) for measuring the deviation angle or attitude of the mass 15 relative to the vertical direction. The sway detection component determines the sway of the mass in the elevator flexible body based on the sensor's detection results (the larger the deviation angle, the greater the sway).

[0073] The following is an exemplary structure of the elevator flexible body sway suppression device 1.

[0074] like Figure 2 As shown in the figure, this embodiment illustrates an exemplary structure of an elevator flexible body sway suppression device 1. The elevator flexible body sway suppression device 1 includes a mass body 15, a drive component, and a first controller (not shown in the figure). The drive component is fixed to the mass body 15, and the first controller can be fixed to the mass body 15 or disposed outside the mass body 15, such as on the car.

[0075] The driving component includes a first pressing member 11 and a second pressing member 12. The first pressing member 11 and the second pressing member 12 have a first edge 111 and a second edge 121, respectively. When the first edge 111 and the second edge 121 are combined, they form a central hole 20. The shape of the central hole matches the cross-sectional shape of the elevator flexible body, so that when the first pressing member 11 and the second pressing member 12 approach each other in such a way that the first edge 111 and the second edge 121 are opposite each other to form the central hole 20, the central hole 20 can accommodate the elevator flexible body 2.

[0076] The drive component also includes an elastic member 13, which is connected to the first pressing member 11 and the second pressing member 12 respectively, such that the pressure applied by the first pressing member 11 and the second pressing member 12 to the elevator flexible body 2 is not less than the pressure threshold, and the coefficient of friction between the contact portion of the first pressing member 11 and the second pressing member 12 and the flexible body 2 is such that when the pressure is not less than the pressure threshold, the first pressing member 11 and the second pressing member 12 and the flexible body 2 only have rolling friction and no sliding friction.

[0077] The first clamping member 11 and the second clamping member 12 are cylindrical rollers, and the shape of one side of the cross section of the cylindrical roller along the straight line where its center is located is half of the central hole 20.

[0078] The first controller controls the sliding of the mass body 15 by controlling the rolling of at least one of the first clamping member 11 and the second clamping member 12.

[0079] Example 3

[0080] like Figure 3 As shown, in this embodiment, based on embodiment 2, the sway suppression device 1 further includes a sway suppression component 14 and a second controller (not shown in the figure). The second controller controls the sway suppression component 14 according to the detection result of the sway detection component, so that the air exerts a force on the sway suppression component 14, and this force is used to suppress the swaying of the elevator flexible body 2.

[0081] The second controller determines the direction and amplitude of the swaying of the elevator flexible body 2 based on the detection results of the sway detection component, determines the direction and magnitude of the force required to suppress the swaying of the elevator flexible body 2, and controls the sway suppression component 14 accordingly to generate the force required to suppress the swaying of the elevator flexible body 2. When there are multiple sway detection components in two horizontal directions, control is performed separately in each direction.

[0082] The second controller uses the sway amplitude of the elevator flexible body 2 as the controlled variable to perform closed-loop control on the sway of the elevator flexible body 2. That is, the desired sway amplitude of the elevator flexible body 2 is used as the controllable input, the difference between the desired sway amplitude and the actual sway amplitude of the elevator flexible body 2 is calculated, and the difference is sent as input to the sway suppression component 14. The sway suppression component 14 generates the control command required to suppress the actual sway amplitude of the elevator flexible body.

[0083] Preferably, the sway suppression component 14 is a fan, and the second controller can change the airflow direction by changing the rotation direction of the fan blades, thereby changing the direction of the force required to suppress the swaying of the elevator flexible body 2. Two sway suppression components 14 are included, and the directions of the forces they generate to suppress the swaying of the elevator flexible body 2 are perpendicular to each other in the horizontal direction. The vertical distance between the two sway suppression components is not less than a distance threshold, in order to avoid mutual interference between airflows.

[0084] This embodiment adds a sway suppression component 14 to actively apply a force to suppress swaying, which can work together with gravity to achieve a better sway suppression effect.

[0085] Example 4

[0086] Based on Embodiment 1, Embodiment 2 or Embodiment 3, the sway suppression device further includes an energy storage device that provides the required energy to the energy-consuming components in the sway suppression device, the energy storage device receiving energy from the outside in a wired or wireless manner.

[0087] When the charging conditions are met, the first controller controls the sway suppression device to slide near the elevator car so as to receive charging from the elevator car (preferably wireless charging).

[0088] Charging conditions include: the remaining energy of the energy storage device is below a threshold, or the amplitude of the flexible body swaying is less than a threshold and / or there are no passengers in the car or the elevator is idle.

[0089] The sway suppression device also includes a communication unit for establishing communication between the sway suppression device and the elevator shaft. When the charging conditions are met or the sway suppression device has reached the charging position near the elevator car, communication is established in the elevator shaft so that the wireless charging transmitter located in the elevator car can be activated to charge the wireless charging receiver of the energy storage device located in the sway suppression device.

Claims

1. A device for suppressing swaying of a flexible elevator body, characterized in that, Includes a mass body, a drive component, and a first controller; The driving component is fixed to the mass body, which drives the mass body to slide up and down along the flexible body in the wellbore. The first controller controls the drive component so that the mass body is located at the intersection of the swaying area and the safe area of ​​the elevator flexible body; the swaying area refers to the part of the elevator flexible body that deviates from its stationary position when it is not swaying due to swaying; the safe area refers to the part of the elevator flexible body that is greater than a preset safe distance from the end of the elevator flexible body and the elevator components that are in direct contact with the elevator flexible body. The sway suppression device further includes: The sway detection component is used to detect the swaying of the mass body in the flexible body of the elevator. The first controller controls the driving component based on the detection results of the shaking detection component; The sway suppression device further includes a sway suppression component and a second controller. The second controller controls the sway suppression component based on the detection result of the sway detection component, so that air exerts a force on the sway suppression component, which is used to suppress the swaying of the elevator's flexible body. The sway suppression component is a fan, and the second controller can change the direction of airflow by changing the rotation direction of the fan blades, thereby changing the direction of the force required to suppress the sway of the elevator flexible body.

2. The elevator flexible body sway suppression device according to claim 1, characterized in that, The first controller controls the drive component according to the following rules: When the mass body moves away from the stationary position of the elevator flexible body along with it, the first controller controls the driving component to make the mass body slide towards the point of maximum sway of the elevator flexible body; when the mass body moves closer to the stationary position of the elevator flexible body along with it, the first controller controls the driving component to make the mass body slide away from the point of maximum sway of the elevator flexible body.

3. The elevator flexible body sway suppression device according to claim 1, characterized in that, The ratio α of the linear density of the sway suppression device along the length of the flexible body to the linear density of the elevator flexible body satisfies min≤α≤max, or the ratio β of the mass of the sway suppression device to the mass of the flexible body of a preset length satisfies min≤β≤max, where min and max are both positive real numbers; the preset length refers to the effective length by which the sway suppression device limits the bending deformation of the flexible body.

4. The elevator flexible body sway suppression device according to claim 1, characterized in that, The driving component includes a first pressing member and a second pressing member. The first pressing member and the second pressing member have a first edge and a second edge, respectively. When the first edge and the second edge are combined, they form a central hole. The shape of the central hole matches the cross-sectional shape of the elevator flexible body, so that when the first pressing member and the second pressing member approach each other in such a way that the central hole is formed by the first edge and the second edge facing each other, the central hole can accommodate the elevator flexible body.

5. The elevator flexible body sway suppression device according to claim 4, characterized in that, The driving component further includes an elastic member, which is connected to the first pressing member and the second pressing member respectively, such that the pressure applied by the first pressing member and the second pressing member to the elevator flexible body is not less than the pressure threshold, and the coefficient of friction between the contact portion of the first pressing member and the second pressing member and the flexible body is such that when the pressure is not less than the pressure threshold, the first pressing member and the second pressing member and the flexible body only have rolling friction and no sliding friction.

6. The elevator flexible body sway suppression device according to claim 5, characterized in that, The first and second clamping components are cylindrical rollers, and the shape of one side of the cross section of the cylindrical roller along the straight line containing its center is half of the central hole.

7. The elevator flexible body sway suppression device according to claim 6, characterized in that, The first controller controls the sliding of the mass body by controlling the rolling of at least one of the first and second clamping members.

8. The elevator flexible body sway suppression device according to claim 1, characterized in that, The swaying area is determined using the building's swaying information and elevator operation information, based on a pre-established elevator flexible body swaying model.

9. The elevator flexible body sway suppression device according to claim 1, characterized in that, The first controller controls the mass body to be positioned such that the distance between the mass body and the maximum sway position in the swaying region does not exceed a threshold.

10. The elevator flexible body sway suppression device according to claim 9, characterized in that, The method by which the first controller determines the position of maximum shaking based on the detection results of the shaking detection component is as follows: Step A1: Control the drive component to move a preset amount of movement in the first direction; Step A2: Detect the sway at the new position. If the sway at the new position is greater than the sway before the move, keep the new position and return to step A1 until the sway at the new position is less than the sway before the most recent move. Take the position before the most recent move as the first position with the greatest sway. Step A3: Control the drive component to move in the second direction by a preset amount of movement; Step A4: Detect the sway at the new position. If the sway at the new position is greater than the sway before the move, keep the new position and return to step A3 until the sway at the new position is less than the sway before the most recent move. Take the position before the most recent move as the second position with the greatest sway. Step A5: Select the position with the larger sway between the first maximum sway position and the second maximum sway position as the maximum sway position and output it.

11. The elevator flexible body sway suppression device according to claim 1, characterized in that, The sway detection component is equipped with a distance sensor, which determines the sway of the mass body in the elevator's flexible body based on the measured distance between the sensor and the shaft wall.

12. The elevator flexible body sway suppression device according to claim 11, characterized in that, There are two ranging sensors, and the ranging directions are perpendicular to each other in the horizontal direction.

13. The elevator flexible body sway suppression device according to claim 11, characterized in that, The sway detection component has a sensor for measuring the deviation angle or attitude of the mass relative to the vertical direction. The sway detection component determines the sway of the mass in the elevator flexible body based on the sensor detection results.

14. The elevator flexible body sway suppression device according to claim 1, characterized in that, The second controller determines the swaying direction and amplitude of the elevator flexible body based on the detection results of the sway detection component, determines the direction and magnitude of the force required to suppress the swaying of the elevator flexible body, and controls the sway suppression component accordingly to generate the force required to suppress the swaying of the elevator flexible body.

15. The elevator flexible body sway suppression device according to claim 14, characterized in that, The second controller uses the sway amplitude of the elevator flexible body as the controlled variable to perform closed-loop control on the sway of the elevator flexible body. That is, it takes the desired sway amplitude of the elevator flexible body as the controllable input, calculates the difference between the desired sway amplitude and the actual sway amplitude of the elevator flexible body, and sends the difference as an input to the sway suppression component. The sway suppression component generates the control command required to suppress the actual sway amplitude of the elevator flexible body.

16. The elevator flexible body sway suppression device according to claim 1, characterized in that, The sway suppression components include two parts, and the directions of the forces they generate to suppress the swaying of the elevator flexible body are perpendicular to each other in the horizontal direction.

17. The elevator flexible body sway suppression device according to claim 16, characterized in that, The vertical distance between the two sway suppression components is not less than the distance threshold.

18. The elevator flexible body sway suppression device according to claim 1, characterized in that, The sway suppression device also includes an energy storage device that provides the necessary energy to the energy-consuming components in the sway suppression device, the energy storage device receiving energy from the outside in a wired or wireless manner.

19. The elevator flexible body sway suppression device according to claim 18, characterized in that, When the charging conditions are met, the first controller controls the sway suppression device to slide near the elevator car so as to receive charging from the elevator car.

20. The elevator flexible body sway suppression device according to claim 19, characterized in that, Charging conditions include: the remaining energy of the energy storage device is below a threshold.

21. The elevator flexible body sway suppression device according to claim 20, characterized in that, Charging conditions also include: the amplitude of flexible body swaying is less than a threshold and / or there are no passengers in the car or the elevator is idle.

22. The elevator flexible body sway suppression device according to claim 19, characterized in that, The sway suppression device also includes a communication unit for establishing communication between the sway suppression device and the elevator shaft. When the charging conditions are met or the sway suppression device has reached the charging position near the elevator car, communication is established in the elevator shaft so that the wireless charging transmitter located in the elevator car can be activated to charge the wireless charging receiver of the energy storage device located in the sway suppression device.

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