CN109132768B - Fatigue life verification system for elevator components - Google Patents
Fatigue life verification system for elevator components Download PDFInfo
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- CN109132768B CN109132768B CN201811275198.9A CN201811275198A CN109132768B CN 109132768 B CN109132768 B CN 109132768B CN 201811275198 A CN201811275198 A CN 201811275198A CN 109132768 B CN109132768 B CN 109132768B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0037—Performance analysers
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Abstract
The present invention relates to a fatigue life verification system for elevator components. The method comprises the following steps: the device comprises a taper sleeve set with a steel wire rope, a rope wheel set, a power device, a mobile platform, a test bed bracket, an electric cabinet, a distance measuring device electrically connected with the electric cabinet and a pressure sensor; the moving table and the rope wheel set are positioned on the test bed bracket, and the moving table is positioned above the rope wheel set and forms a space with the rope wheel set; the taper sleeve group is positioned in the space and wound on the rope pulley group, and one end of the taper sleeve group is fixedly connected with the mobile station; the power device is fixed on the test bed support, the electric cabinet is electrically connected with the power device, and the pressure sensor is used for measuring the stress of the steel wire rope in the tensioning state and feeding the stress back to the electric cabinet. By utilizing the system, the elongation of the elevator steel wire rope can be measured on the ground, and the structure is simpler, so that the verification cost can be greatly reduced.
Description
Technical Field
The invention relates to the technical field of engineering, in particular to a fatigue life verification system for an elevator component.
Background
The elevator steel wire rope and the termination device are common parts of the elevator, the taper sleeve is the most important part of the termination device, and the fatigue life of the taper sleeve and the steel wire rope are related to the safe operation problem of the elevator. Therefore, it is very important to verify the fatigue life of the steel wire rope and the fatigue life of the taper sleeve.
The traditional verification of the fatigue life of the steel wire rope of the elevator is generally carried out at the bottom of the elevator well, and whether the steel wire rope reaches the fatigue life or not is determined by manually measuring the elongation of the steel wire rope of the counterweight on the side opposite to the elevator car. The fatigue life of the taper sleeve is generally only the strength theoretical value calculated through the aspect of material mechanics, and no experimental value exists. Therefore, when the taper sleeve can be replaced without knowing how many times the steel wire rope is used, the taper sleeve is replaced together when the steel wire rope of the elevator is replaced each time for safe operation of the elevator.
However, the scheme for measuring whether the steel wire rope reaches the fatigue life at the bottom of the elevator has the problem of high verification cost.
Disclosure of Invention
Therefore, it is necessary to provide a fatigue life verification system for elevator components, which aims at the problem that the verification cost is high due to the scheme of measuring whether the steel wire rope reaches the fatigue life at the bottom of the elevator.
A fatigue life verification system for an elevator component, comprising: the device comprises a taper sleeve set with a steel wire rope, a rope wheel set, a power device, a mobile platform, a test bed bracket, an electric cabinet, a distance measuring device electrically connected with the electric cabinet and a pressure sensor; the moving table and the rope wheel set are positioned on the test bed bracket, and the moving table is positioned above the rope wheel set and forms a space with the rope wheel set; the taper sleeve group is positioned in the space and wound on the rope pulley group, and one end of the taper sleeve group is fixedly connected with the mobile station; the power device is fixed on the test bed bracket, and the electric cabinet is electrically connected with the power device;
the power device outputs driving force under the control of the electric cabinet so as to drive the mobile platform to move up and down; the distance measuring device is used for measuring the elongation of the steel wire rope when the steel wire rope moves upwards from the stretched state to the tensioned state, and the pressure sensor is used for measuring the stress of the steel wire rope in the tensioned state and feeding the stress back to the electric cabinet.
In one embodiment, the sheave assembly includes: the device comprises a rope pulley, a rotating shaft and two rope pulley supports which are oppositely arranged, wherein the two rope pulley supports are fixed on a test bed support; the rotating shaft penetrates through the two rope wheel brackets, the rope wheel is sleeved on the rotating shaft, and the steel wire rope is wound on the rope wheel; in an initial state, the steel wire ropes are in a stretched state under the action of the rope wheel, and the length of the steel wire ropes on two sides of the rope wheel is the same.
In one embodiment, the set of cones comprises: the device comprises two taper sleeves, two wedge blocks, a steel wire rope, two lifting eye bolts and two pin shafts; one end of the lifting eye bolt is inserted into the taper sleeve and connected with the taper sleeve through the pin shaft, and the other end of the lifting eye bolt is fixedly connected with the mobile station; and two ends of the steel wire rope are respectively positioned in the cavity inside the taper sleeve and are fixed in the taper sleeve through wedging of the wedge block.
In one embodiment, the set of cones further comprises a fixture; the other end of the lifting bolt penetrates through the mobile station and protrudes out of the mobile station; the pressure sensor is sleeved on the part, protruding out of the mobile station, of the lifting bolt, and the fixing piece is used for fixing the pressure sensor and the lifting bolt on the mobile station.
In one embodiment, the power plant comprises: the device comprises a torque motor, a speed reducer, a staggered shaft transmission assembly, a coupler and a ball screw group; the driving shaft of the torque motor is connected with the staggered shaft transmission assembly through the driving shaft of the speed reducer; the staggered shaft transmission assembly is connected with the ball screw group through a coupler; the torque motor and the speed reducer are electrically connected with the electric cabinet; the torque motor and the speed reducer horizontally rotate under the electric action of the electric cabinet and generate horizontal power; and the horizontal power is transmitted to the ball screw group under the action of the staggered shaft transmission assembly and the shaft coupling, so that the ball screw group rotates to drive the mobile platform to move up and down.
In one embodiment, the power device further comprises a screw bracket, the coupler is located in a hollow cavity inside the screw bracket, and one end of the rolling screw group penetrates through a through hole in the screw bracket to be connected with the coupler.
In one embodiment, the test stand support comprises: the support comprises a support upper beam, a support base and a guide polished rod, wherein the support upper beam is connected with the support base through the guide polished rod; the distance measuring device is fixed on the upper beam of the bracket; the power device and the rope wheel set are respectively fixed on the bracket base, and the ball screw set is rotationally connected with the bracket upper beam; the moving table moves up and down along the guide polish rod.
In one embodiment, the mobile station comprises: the device comprises a mobile platform bracket, a ball nut group and a linear bearing; one end of the guide polished rod penetrates through the linear bearing and is connected with the upper beam of the bracket; the other end of the guide polished rod is connected with the bracket base; the ball screw group penetrates through the ball nut group and is rotationally connected with the upper beam of the bracket; the ball nut group drives the moving platform to move up and down along the guide polish rod under the rotating action of the ball screw group.
In one embodiment, the electric cabinet includes: the PLC comprises a PLC programmable logic controller, a torque motor controller and a display screen; the PLC is electrically connected with the torque motor controller and the display screen; the torque motor controller is electrically connected with the torque motor and the speed reducer.
In one embodiment, the system further comprises: the photographing component is electrically connected with the electric cabinet; the photographing assembly is used for photographing the state of the taper sleeve in the taper sleeve set and sending the obtained image to the electric cabinet.
The fatigue life verification system for an elevator component includes: the device comprises a taper sleeve set with a steel wire rope, a rope wheel set, a power device, a moving platform, a test bed support, an electric cabinet, a distance measuring device and a pressure sensor. After the electric cabinet is started to work, firstly inputting parameters on the electric cabinet to obtain a curve of tension and time borne by the steel wire rope, and then the electric cabinet can output driving force through controlling a power device to enable the mobile station to move up and down so as to drive the steel wire rope to stretch and generate elongation; the pressure sensor can monitor whether the power device outputs the driving force according to the preset pulling force or not, the driving force is transmitted to the electric cabinet for processing, the distance measuring device can measure the elongation of the steel wire rope in the moving process of the mobile station, the total elongation of the steel wire rope is obtained, the measured total elongation of the steel wire rope is compared with the scrapped elongation of the preset steel wire rope, if the scrapped elongation of the preset steel wire rope is reached, the steel wire rope is replaced, and if the scrapped elongation of the preset steel wire rope is not reached, the steel wire rope is continuously utilized for testing. The fatigue life verification system for the elevator component can truly simulate the operation process of the elevator, so that the total elongation of the steel wire rope obtained by the system accords with the actual operation condition of the elevator, the total elongation is compared with the preset scrapped elongation of the steel wire rope, whether the steel wire rope needs to be replaced or not can be verified, and the verification result is accurate. In addition, the system provided by the embodiment can be implemented on the ground, is different from the traditional scheme of measuring the fatigue life of the elevator steel wire rope at the bottom of the elevator shaft, and has a simpler composition structure, so that the verification cost can be greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a fatigue life verification system for elevator components according to an embodiment;
fig. 2 is a schematic structural diagram of a sheave group in a fatigue life verification system for elevator components according to an embodiment;
fig. 3 is a schematic structural diagram of a taper sleeve group in a fatigue life verification system of an elevator component provided by an embodiment;
fig. 4 is a schematic diagram of a power plant in a fatigue life verification system for elevator components according to an embodiment;
FIG. 5 is a schematic diagram of a test bed bracket in a fatigue life verification system for elevator components according to an embodiment;
fig. 6 is a schematic structural diagram of a mobile station in a fatigue life verification system for elevator components according to an embodiment;
fig. 7 is a schematic structural diagram of an electric cabinet in a fatigue life verification system for elevator components according to an embodiment;
FIG. 8 is a graph of tension experienced by a wire rope versus time in one embodiment;
fig. 9 is a schematic structural diagram of a fatigue life verification system for an elevator component according to another embodiment.
Reference numerals:
10: a cone sleeve set; 11: a rope pulley group;
12: a power plant; 13: a mobile station;
14: a test stand support; 15: an electric cabinet;
16: a distance measuring device; 17: a pressure sensor;
18: a photographing component; 101: a wire rope;
102: a taper sleeve; 103: a wedge block;
104: an eye bolt; 105: a pin shaft;
106: a fixing member; 107: an elastic cushion pad;
111: a sheave; 112: a rotating shaft;
113: a sheave bracket; 114: fixing the bolt;
121: a torque motor; 122: a speed reducer;
123: a cross-shaft drive assembly; 124: a coupling;
125: a ball screw group; 126: a lead screw bracket;
131: a mobile station support; 132: a ball nut set;
133: a linear bearing; 141: a support is put on the beam;
142: a bracket base; 143: a guide polish rod;
144: a ground cup; 151: a PLC programmable logic controller;
152: a torque motor controller; 153: a display screen.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The fatigue life verification system of elevator part that this application embodiment provided can be applied to the elevator field. It not only can be used for measuring whether elevator wire rope reaches fatigue life, can also be used for measuring whether elevator wire rope's termination equipment reaches fatigue life. Because the terminating device comprises parts such as a taper sleeve and a wedge block, the fatigue life verification system for the elevator part provided by the embodiment of the invention can also verify whether the taper sleeve reaches the fatigue life, and the embodiment of the application does not limit the system.
The traditional verification of the fatigue life of the steel wire rope of the elevator is generally carried out at the bottom of the elevator well, and whether the steel wire rope reaches the fatigue life or not is determined by manually measuring the elongation of the steel wire rope of the counterweight on the side opposite to the elevator car. Although the scheme can measure whether the steel wire rope reaches the fatigue life, the verification needs to be carried out at the bottom of the elevator shaft, so that the problem of high verification cost exists. The embodiment of the application provides a fatigue life verification system of elevator part, aims at solving above technical problem in the conventional art.
Fig. 1 is a schematic structural diagram of a fatigue life verification system for elevator components according to an embodiment. As shown in fig. 1, the system includes: the device comprises a taper sleeve group 10 with a steel wire rope 101, a rope pulley group 11, a power device 12, a mobile station 13, a test bed bracket 14, an electric cabinet 15, a distance measuring device 16 electrically connected with the electric cabinet 15 and a pressure sensor 17; the moving table 13 and the rope pulley group 11 are positioned on the test bed bracket 14, and the moving table 13 is positioned above the rope pulley group 11 and forms a space with the rope pulley group 11; the taper sleeve set 10 is located in the space and is wound on the rope pulley set 11, and one end of the taper sleeve set 10 is fixedly connected with the mobile station 13; the power device 12 is fixed on the test bed bracket 14, and the electric cabinet 15 is electrically connected with the power device 12.
In an initial state, the steel wire rope 101 is in a stretched state, and the power device 12 outputs a driving force under the control of the electric cabinet 15 so as to drive the mobile station 13 to move up and down; the steel wire rope 101 changes from a stretched state to a tensioned state when the mobile station 13 moves upwards, the distance measuring device 16 is used for measuring the elongation of the steel wire rope 101 when the stretched state is changed to the tensioned state, and the pressure sensor is used for measuring the stress of the steel wire rope in the tensioned state and feeding the stress back to the electric cabinet.
Specifically, the moving platform 13 and the sheave group 11 are located on the test bed bracket 14, and optionally, the moving platform and the sheave group may be connected to the test bed bracket by using bolts or other fasteners, which is not limited in this embodiment; the moving table 13 is located above the sheave block 11, so a certain distance exists between the sheave block 11 and the moving table 13, and optionally, the distance between the moving table 13 and the sheave block 11 may be determined according to the length of the steel wire rope 101 that is actually used, which is not limited in this embodiment. A space can be formed between the mobile station 13 and the sheave group 11, the taper sleeve group 10 is located in the space and wound on the sheave group 11, and one end of the taper sleeve group 10 is fixedly connected with the mobile station 13, optionally, the connection may be fixed by using a nut, or may be fixed by using other fasteners, which is not limited in this embodiment. In addition, the power device 12 is fixed on the test bed bracket 14, and optionally, the power device may be fixed by using a bolt, or may be fixed by using other fasteners, which is not limited in this embodiment.
In addition, in the initial state, the wire rope 101 is in a stretched state in which the wire rope is stretched and the elongation is zero.
When the fatigue life verification system of the elevator component works, the working principle is as follows:
when the system works, the electric cabinet 15 is started firstly, the electric cabinet 15 enters parameter setting in the electric cabinet 15 firstly after being started, and numerical values of car full load force, car running acceleration frequency, intermittent time, single vibration frequency and steel wire rope scrapped elongation are input respectively according to test requirements. The car full load force refers to the weight of the car plus the weight of a full load; alternatively, the car running acceleration may be a constant value, and the acceleration represents a change process of the speed of the elevator in actual running (for example, up and down running), and the tension of the steel wire rope connected with the elevator is continuously changed based on the acceleration in the running process of the car. Optionally, the car running acceleration frequency refers to the speed of the elevator in ascending and descending. The intermittent time refers to the situation that the elevator has a rest for a period of time after running for a period of time, and then continues to run, and the rest period of time is the intermittent time. The single vibration times refer to the number of floors above and/or the number of floors below the elevator in a period from the ending time of the last intermittent time to the starting time of the next intermittent time in the actual running process of the elevator.
Based on the introduction of the parameters, the electric cabinet can generate a curve with the vertical axis as the tension applied to the steel wire rope and the horizontal axis as time based on the parameters, as shown in fig. 8, the curve in fig. 8 represents the stress change condition of the steel wire rope under the influence of the parameters of the car running acceleration, the car full load force, the car running acceleration frequency, the intermittent time and the single vibration frequency along with the continuous change of the time. Taking point a in fig. 8 as an example, the horizontal line on the curve simulates the full load of the on-site car, and the ripple of the curve simulates the stress of the steel wire rope when the car is accelerated and decelerated during operation.
Therefore, based on the parameters, the electric control box only needs to monitor and control the tension measured by the pressure sensor to meet the curve shown in fig. 8, and the real running condition of the car is simulated. Therefore, in the actual control process, the electric cabinet 15 can control the power device 12 to output the driving force, and the power device 12 is connected with the mobile station 13, so that the driving force can drive the mobile station 13 to move up and down; in the process that the mobile station 13 moves up and down, the mobile station can generate an upward or downward pulling force for the steel wire rope 101, the pressure sensor 17 can monitor the pulling force measured by the pressure sensor in real time, and a pulling force signal measured in real time is uploaded to the electric control box 15, so that the electric control box 15 can compare the pulling force measured by the pressure sensor 17 with the pulling force corresponding to the moment on the curve of fig. 8; optionally, if the comparison result is that the tension measured by the pressure sensor 17 is not equal to the preset tension, the electric control box 15 may output a new voltage or a new current signal to the power device 12, so that the tension of the steel wire rope can meet the curve change in fig. 8, thereby simulating a real elevator car running condition.
Based on the above real simulation, in the process of multiple up-and-down movements of the mobile station 13, the steel wire rope 101 is stretched to generate an elongation, the distance measuring device 16 may measure the elongation and upload the measured elongation to the electric cabinet 15 for processing, optionally, the processing may be to multiply the elongation measured by the distance measuring device 16 by 2 to obtain the total elongation of the steel wire rope, and compare the total elongation with the preset scrapped elongation of the steel wire rope; optionally, if the comparison result shows that the total elongation of the steel wire rope is less than the preset scrapped elongation of the steel wire rope, the steel wire rope can be continuously used for testing; if the comparison result shows that the total elongation of the steel wire rope is equal to and/or larger than the preset scrapped elongation of the steel wire rope, the steel wire rope needs to be replaced, and then the next test is carried out. Optionally, the distance measuring device 16 may be a distance measuring sensor, or may be another device capable of measuring a distance, which is not limited in this embodiment.
Based on the real simulation process, the actual elongation of the elevator steel wire rope in the real operation process of the elevator can be obtained, so that the total elongation of the steel wire rope obtained by the verification system is more consistent with the elongation of the steel wire rope under the real condition. Therefore, by using the fatigue life verification system for elevator components provided by the embodiment, as the running condition of the elevator can be truly simulated, the total elongation of the steel wire rope obtained by the system conforms to the actual running condition of the elevator, and the steel wire rope can be verified whether to be replaced or not by comparing the total elongation with the preset scrapped elongation of the steel wire rope, and the verification result is accurate. That is to say, the system provided by the embodiment can be implemented on the ground, and different from the traditional scheme of measuring the fatigue life of the elevator steel wire rope at the bottom of the elevator, the component structure of the system is simpler, so that the verification cost can be greatly reduced.
The fatigue life verification system for elevator components provided by the embodiment comprises: the device comprises a taper sleeve set with a steel wire rope, a rope wheel set, a power device, a moving platform, a test bed support, an electric cabinet, a distance measuring device and a pressure sensor. In the embodiment, after the electric cabinet is started to work, firstly, parameters are input into the electric cabinet to obtain a curve of tension and time borne by the steel wire rope, and then the electric cabinet can output driving force through controlling the power device to enable the mobile station to move up and down so as to drive the steel wire rope to stretch and generate elongation; the pressure sensor can monitor whether the power device outputs the driving force according to the preset pulling force or not, the driving force is transmitted to the electric cabinet for processing, the distance measuring device can measure the elongation of the steel wire rope in the moving process of the mobile station, the total elongation of the steel wire rope is obtained, the measured total elongation of the steel wire rope is compared with the scrapped elongation of the preset steel wire rope, if the scrapped elongation of the preset steel wire rope is reached, the steel wire rope is replaced, and if the scrapped elongation of the preset steel wire rope is not reached, the steel wire rope is continuously utilized for testing. The fatigue life verification system for the elevator component can truly simulate the operation process of the elevator, so that the total elongation of the steel wire rope obtained by the system accords with the actual operation condition of the elevator, the total elongation is compared with the preset scrapped elongation of the steel wire rope, whether the steel wire rope needs to be replaced or not can be verified, and the verification result is accurate. In addition, the system provided by the embodiment can be implemented on the ground, is different from the traditional scheme of measuring the fatigue life of the elevator steel wire rope at the bottom of the elevator shaft, and has a simpler composition structure, so that the verification cost can be greatly reduced.
Fig. 2 is a schematic structural diagram of a sheave group in the fatigue life verification system for elevator components according to an embodiment. On the basis of the above embodiment, as shown in fig. 2, the sheave group 11 includes: the device comprises a rope pulley 111, a rotating shaft 112 and two rope pulley brackets 113 which are oppositely arranged, wherein the two rope pulley brackets 113 are fixed on the test bed bracket 14; the rotating shaft 112 penetrates through the two rope wheel brackets 113, the rope wheel 111 is sleeved on the rotating shaft 112, and the steel wire rope 101 is wound on the rope wheel 111; in an initial state, the steel wire rope 101 is in a stretched state under the action of the rope pulley 111, and the lengths of the steel wire ropes 101 on the two sides of the rope pulley 111 are the same.
Specifically, the sheave block 11 may further include a fixing bolt 114, and the fixing bolt 114 may be used to fixedly connect the two sheave brackets 113 to the test bed bracket 14, alternatively, four fixing bolts 114 may be used in this embodiment, or other numbers of fixing bolts 114 may be used, and the number of the fixing bolts 114 is not limited in this embodiment; in addition, the center of the rope wheel 111 can be provided with a through hole, so that the rope wheel can be sleeved on the rotating shaft 112 through the through hole; the thickness of the rotating shaft 112 and the diameter of the central through hole of the rope pulley 111 can be determined according to the actual situation, as long as the two can be matched, which is not limited in this embodiment; the diameter of the sheave 111 may be determined according to the actual situation, and this embodiment is not limited to this.
In an initial state, the rotating shaft 112 can be rotated to drive the rope pulley 111 to rotate, so that the steel wire rope 101 wound around the rope pulley 111 is in a stretched state, and the rotation can also move the steel wire rope 101, and finally, the lengths of the steel wire ropes 101 on two sides of the rope pulley 111 are equal.
The rope sheave group in this embodiment includes rope sheave, pivot, two rope sheave supports of relative setting, can also include fixing bolt. The rope wheel support can be fixed on the test bed support through the fixing bolt, the rope wheel can be sleeved on the rotating shaft, and the rotating shaft can penetrate through the two rope wheel supports. Utilize this rope sheave group, can make the wire rope length that is located the rope sheave both sides equal, the rope sheave group can make the wire rope of rope sheave both sides reciprocate the in-process at the mobile station promptly, obtains the same pulling force, and then can produce the same elongation, and the range unit of being convenient for obtains wire rope's elongation through the displacement who measures the mobile station, then multiplies 2 with this displacement. In addition, the rope wheel set can change the stress direction of the steel wire rope on the rope wheel in the process of moving the mobile station up and down, so that the fatigue life verification system of the elevator component can better simulate the actual process of moving the elevator up and down, and the measured elongation of the steel wire rope can be more fit with the actual elongation of the steel wire rope in the running process of the elevator.
Fig. 3 is a schematic structural diagram of a taper sleeve set in the fatigue life verification system for elevator components according to an embodiment. On the basis of the above embodiment, as shown in fig. 3, the taper sleeve set includes two taper sleeves 102, two wedges 103, a steel wire rope 101, two eyebolts 104, and two pins 105; one end of the lifting eye bolt 104 is inserted into the taper sleeve 102 and connected with the taper sleeve 102 through the pin shaft 105, and the other end of the lifting eye bolt 104 is fixedly connected with the mobile station 13; two ends of the steel wire rope 101 are respectively positioned in the cavity inside the taper sleeve 102 and are wedged and fixed in the taper sleeve 102 through the wedge block 103.
Specifically, the other end of the eye bolt 104 is fixedly connected to the mobile station 13, optionally, a nut may be used for connection, and other fastening members may also be used for connection, which is not limited in this embodiment. In addition, the size of the taper sleeve 102 and the size of the wedge 103 may be determined according to actual conditions, as long as the two can be matched, and the steel wire rope 101 can be fixed in the inner cavity of the taper sleeve 102, which is not limited in this embodiment; similarly, the thickness of the steel wire rope 101 and the size of the inner cavity of the taper sleeve 102 are not limited in this embodiment as long as the steel wire rope 101 can pass through the taper sleeve 102.
Optionally, with continued reference to fig. 3, the set of cones 10 may further include a fixture 106; the other end of the lifting bolt 104 penetrates through the mobile station 13 and protrudes out of the mobile station 13; the pressure sensor 17 is sleeved on the part of the eyebolt 104 protruding out of the mobile station 13, and the fixing piece 106 is used for fixing the pressure sensor 17 and the eyebolt 104 on the mobile station 13.
In this possible embodiment, the taper sleeve set may further include an elastic buffer pad 107 for damping the mobile station 13 when the verification system is in operation, the elastic buffer pad 107 is sleeved on a portion of the eyebolt 104 protruding from the mobile station 13, and on a side having the pressure sensor 17, the elastic buffer pad 107 may be sleeved under the pressure sensor 17; the pressure sensor 17 may be a hollow pressure sensor, so that the pressure sensor 17 may be sleeved on the portion of the eyebolt 104 protruding from the mobile station 13, measure the stress of the steel wire rope 101, and transmit the measured stress to the electric cabinet 15 for processing; optionally, the height of the portion of the eye bolt 104 protruding from the mobile station 13 may be determined according to actual situations, which is not limited in this embodiment; alternatively, the fastener 106 may be a nut, or may be another fastener that can be matched with the eyebolt 104, and this embodiment is not limited thereto as long as the fastener 106 can fix the pressure sensor 17 and the eyebolt 104 on the mobile station 13.
The taper sleeve group in this embodiment includes: the device comprises two taper sleeves, two wedge blocks, a steel wire rope, two lifting bolts, two pin shafts, a pressure sensor and a fastener. One end of the lifting bolt is inserted into the taper sleeve and connected with the taper sleeve through a pin shaft, the other end of the lifting bolt penetrates through the mobile station and protrudes out of the mobile station, the pressure sensor is sleeved on the protruding part of the lifting bolt, the pressure sensor and the lifting bolt can be fixed on the mobile station through the fastener, the up-and-down operation process of the elevator can be truly simulated through the structures of the parts and the connection relation between the parts, and a foundation is established for the subsequent measurement of the fatigue life of the steel wire rope. In addition, the two ends of the steel wire rope are respectively positioned in the cavity inside the taper sleeve and are fixed in the taper sleeve through wedge wedging, so that the steel wire rope can be prevented from falling off on one hand, and the real state of the steel wire rope in the running process of the elevator can be truly simulated on the other hand, and the fatigue life of the steel wire rope and the fatigue life of the taper sleeve can be conveniently measured in the subsequent process.
Fig. 4 is a schematic structural diagram of a power unit in the fatigue life verification system for elevator components according to an embodiment. In addition to the above embodiment, as shown in fig. 4, the power unit 12 includes: a torque motor 121, a speed reducer 122, a staggered shaft transmission assembly 123, a coupling 124 and a ball screw group 125; the driving shaft of the torque motor 121 is connected with the staggered shaft transmission assembly 123 through the driving shaft of the speed reducer 122; the staggered shaft transmission assembly 123 is connected with the ball screw group 125 through a coupling 124; the torque motor 121 and the speed reducer 122 are electrically connected with the electric cabinet 15; the torque motor 121 and the speed reducer 122 horizontally rotate under the electric action of the electric cabinet 15 and generate horizontal power; the horizontal power is transmitted to the ball screw assembly 125 under the action of the staggered shaft transmission assembly 123 and the shaft coupling 124, so that the ball screw assembly 125 rotates to drive the mobile station 13 to move up and down.
Specifically, a driving shaft of the torque motor 121 is connected with a driving shaft of the speed reducer 122, optionally, the connection may be a fixed connection or a detachable connection, for example, a coupling connection may be adopted; in addition, the driving shaft of the speed reducer 11 is connected to the staggered shaft transmission assembly 123, optionally, the connection may be a fixed connection or a detachable connection, and for the staggered shaft transmission assembly 123, optionally, a gear transmission assembly may be used, or a worm gear transmission assembly may also be used, which is not limited in this embodiment.
Optionally, the power device may further include a screw bracket 126, the coupler 124 is located in a hollow cavity inside the screw bracket 126, and one end of the rolling screw group 125 passes through a through hole on the screw bracket 126 and is connected to the coupler 124.
In this possible embodiment, the power device 12 may be connected to the test bed bracket 14 through the lead screw bracket 126, and optionally, the connection may be through a bolt, or may be through other fasteners, which is not limited in this embodiment; in addition, the size of the hollow cavity inside the screw rod bracket 126 may be determined according to actual conditions, and the shape of the screw rod bracket 126 may be a rectangular parallelepiped or a square, which is not limited in this embodiment; in addition, the size and shape of the through hole of the screw bracket 126 are not limited in this embodiment, as long as one end of the ball screw group 125 can pass through the through hole.
The power plant in this embodiment includes: torque motor, speed reducer, staggered shaft transmission assembly, shaft coupling, ball screw group. In this embodiment, after the electric cabinet is started, the electric cabinet controls the torque motor to output a horizontal driving force, and the speed reducer can increase a torque to a driving shaft of the torque motor, so that an output torque of the torque motor can be changed; torque motor can be through crisscross axle drive assembly and shaft coupling with horizontal drive power transmission for ball group to make ball group rotate, can drive the mobile station when this ball group rotates and reciprocate, thereby make wire rope receive the pulling force, slowly become the tight state of rising from the state of straightening, and then produce the elongation, the range unit's of being convenient for measurement. In addition, when the power device further comprises a screw bracket, one end of the ball screw group penetrates through the through hole in the screw bracket to be connected with the coupler, so that the stability of the ball screw group during rotation can be ensured; in addition, the screw rod support can be fixed on a test bed support, so that the stability of the whole power device in the motion process is ensured, and the subsequent measurement of the elongation of the steel wire rope is facilitated.
Fig. 5 is a schematic structural diagram of a test bed bracket in the fatigue life verification system for elevator components provided by one embodiment. On the basis of the above embodiment, as shown in fig. 5, the above-described test stand support 14 includes: the support comprises a support upper beam 141, a support base 142 and a guide polished rod 143, wherein the support upper beam 141 is connected with the support base 142 through the guide polished rod 143; the distance measuring device 16 is fixed on the bracket upper beam 141; the power device 12 and the rope pulley set 11 are respectively fixed on the bracket base 142, and the ball screw set 125 is rotatably connected with the bracket upper beam 141; the moving table 13 moves up and down along the guide polished rod 143.
In particular, the test stand support 14 may further include a ground cup 144 to ensure the test stand support is level and provide shock absorption during operation of the test stand support. Optionally, the number of the foundation cups 144 may be four, or six or eight foundation cups, which is not limited in this embodiment; the distance measuring device 16 is fixed on the upper beam 141 of the bracket, optionally, the distance measuring device 16 may be fixed in an internal cavity formed by the upper beam 141 of the bracket, or may be fixed outside the upper beam 141 of the bracket, which is not limited in this embodiment; the power device 12 and the sheave group 11 are respectively fixed on the bracket base 142, optionally, the fixing manner may be bolt fixing, or fixing by using other fasteners, which is not limited in this embodiment; optionally, the ball screw assembly 125 and the upper beam 141 of the bracket may be connected by a ball nut assembly, or by another rotating member.
The test bench support in this embodiment includes: the support upper beam, the support base and the guide polished rod can also comprise a ground foot cup. The upper beam of the bracket is connected with the base of the bracket through the guide polished rod, so that the bracket of the test bed can form a frame to enhance the strength of the bracket of the test bed; in addition, the guide polished rod is used for guiding the mobile station so as to ensure that the mobile station can run stably when moving up and down along the guide polished rod; the power device and the rope wheel are respectively fixed on the bracket base, so that the stability of the verification system in operation can be ensured; the ball screw group of the power device is rotationally connected with the upper beam of the bracket, so that the stability of the ball screw group of the power device in rotation can be ensured.
Fig. 6 is a schematic structural diagram of a mobile station in the fatigue life verification system for elevator components provided by one embodiment. In addition to the above embodiment, as shown in fig. 6, the mobile station 13 includes: a moving table bracket 131, a ball nut set 132, and a linear bearing 133; one end of the guide polished rod 143 passes through the linear bearing 133 to be connected with the bracket upper beam 141; the other end of the guide polished rod 143 is connected with the bracket base 142; the ball screw group 125 passes through the ball nut group 132 and is rotationally connected with the bracket upper beam 141; the ball nut set 132 drives the mobile station 13 to move up and down along the guide rod 143 under the rotation action of the ball screw set 125.
Specifically, one end of the guide polished rod 143 is connected to the bracket upper beam 141, and the other end of the guide polished rod 143 is connected to the bracket base 142, optionally, the two connections may be fixed connections or detachable connections, which is not limited in this embodiment.
The mobile station in the present embodiment includes: the moving platform comprises a moving platform bracket, a ball nut group and a linear bearing. One end of the guide polished rod penetrates through the linear bearing to be connected with the upper beam of the support, and the other end of the guide polished rod is connected with the base of the support, so that the stability of the mobile station in the motion process is ensured.
Fig. 7 is a schematic structural diagram of an electric cabinet in the fatigue life verification system for elevator components according to an embodiment. In addition to the above-described embodiments, as shown in fig. 7, the electric control box 15 includes: a PLC 151, a torque motor controller 152 and a display 153; the PLC 151 is electrically connected with the torque motor controller 152 and the display screen 153; the torque motor controller 152 is electrically connected to the torque motor 121 and the speed reducer 122.
Specifically, after the electric cabinet 15 is started, the parameter setting in the display screen 153 is firstly entered, and the numerical values of the car full load force, the car running acceleration frequency, the intermittent time, the single vibration frequency and the steel wire rope scrapped elongation are respectively input according to the test requirements. The above parameters can be introduced in the introduction part of the embodiment of fig. 1, and the description of the embodiment is omitted here. After the parameters are set, the start button on the display 153 is pressed to start the test, and the PLC 151 may generate a curve whose vertical axis is the tensile force applied to the steel wire rope and horizontal axis is time according to the input parameters, as shown in fig. 8, where the curve in fig. 8 represents the stress change condition of the steel wire rope under the influence of the parameters of the car running acceleration, the car full load force, the car running acceleration frequency, the pause time, and the single vibration frequency, along with the continuous change of time. Taking point a in fig. 8 as an example, the horizontal line on the curve simulates the full load of the on-site car, and the ripple of the curve simulates the stress of the steel wire rope when the car is accelerated and decelerated during operation.
Therefore, based on the above parameters, the PLC 151 simulates the real operation of the car as long as it monitors and controls the tension measured by the pressure sensor to satisfy the curve shown in fig. 8. Therefore, in the actual control process, the PLC 151 may control the torque motor 121 to output the driving force by controlling the torque motor controller 152, so as to drive the mobile station 13 to move up and down; in the process that the mobile station 13 moves up and down, the mobile station can generate an upward or downward pulling force for the steel wire rope 101, the pressure sensor 17 can monitor the pulling force measured by the pressure sensor in real time, and a pulling force signal measured in real time is uploaded to the PLC 151, so that the PLC 151 can compare the pulling force measured by the pressure sensor 17 with the pulling force corresponding to the moment on the curve of FIG. 8; optionally, if the comparison result is that the tension measured by the pressure sensor 17 is not equal to the preset tension, the PLC 151 may output a new voltage or a new current signal to the power plant 12, so that the tension of the steel wire rope can meet the curve change in fig. 8, thereby simulating a real elevator car operating condition.
In addition, the PLC 151 may also perform analog-to-digital conversion on the measured analog tension signal, transmit the converted digital tension signal to the display 153, and record and store the digital tension signal in the display 153.
Based on the above real simulation, in the process of multiple up-and-down movements of the mobile station 13, the steel wire rope 101 is stretched to generate an elongation, the distance measuring device 16 may measure the elongation, and the measured elongation is uploaded to the PLC programmable logic controller 151 for processing, optionally, the processing may be to multiply the elongation measured by the distance measuring device 16 by 2 to obtain a total elongation of the steel wire rope, and compare the total elongation with a preset scrapped elongation of the steel wire rope; optionally, if the comparison result shows that the total elongation of the steel wire rope is less than the preset scrapped elongation of the steel wire rope, the steel wire rope can be continuously used for testing; if the comparison result shows that the total elongation of the steel wire rope is equal to and/or larger than the preset scrapped elongation of the steel wire rope, the steel wire rope needs to be replaced, and then the next test is carried out.
In addition, the PLC 151 may also perform analog-to-digital conversion on the obtained analog signal of the total elongation of the steel wire rope, transmit the converted digital signal to the display 153, and record and store the digital signal in the display 153.
Optionally, the electric cabinet 15 may be placed on the test bed bracket 14, or may be placed at another position, which is not limited in this embodiment.
The electric cabinet in this embodiment includes: PLC programmable logic controller, torque motor controller, display screen. After the electric cabinet is started to work, firstly, parameters are input on a display screen to obtain a curve of tension and time borne by the steel wire rope, and then the PLC can control the torque motor to output driving force by controlling the torque motor controller so as to enable the mobile station to move up and down, so that the steel wire rope is driven to stretch to generate elongation; the pressure sensor can monitor whether the torque motor outputs driving force according to preset tension, the driving force is transmitted to the PLC for processing, the distance measuring device can measure the elongation of the steel wire rope in the moving process of the mobile station, the total elongation of the steel wire rope is obtained, the measured total elongation of the steel wire rope is compared with the scrapped elongation of the preset steel wire rope, if the scrapped elongation of the preset steel wire rope is reached, the steel wire rope is replaced, and if the scrapped elongation of the preset steel wire rope is not reached, the steel wire rope is continuously used for continuing the test. The electric cabinet provided by the implementation can truly simulate the running process of the elevator, so that the total elongation of the steel wire rope obtained through the electric cabinet accords with the real running condition of the elevator, the total elongation is compared with the preset steel wire rope scrapped elongation, whether the steel wire rope needs to be replaced or not can be verified, and the verified result is accurate.
In the prior art, although whether the steel wire rope reaches the fatigue life can be measured in the pit, the taper sleeve cannot be measured, the fatigue life is not reached, therefore, generally, when the steel wire rope is replaced, the taper sleeve can be replaced at the same time, so that the steel wire rope is replaced at the same time, the taper sleeve does not reach the fatigue life, the maintenance cost of the elevator is increased, and the problem of resource waste is caused. The following embodiments of the present application may further address this issue.
Fig. 9 is a schematic structural diagram of a fatigue life verification system for an elevator component according to another embodiment. On the basis of the above embodiment, as shown in fig. 9, the system may further include: the photographing component 18 is electrically connected with the electric cabinet 15; the photographing component 18 is configured to photograph the state of the taper sleeve 102 in the taper sleeve set 10, and send an obtained image to the electric cabinet 15.
Specifically, when the measured elongation of the steel wire rope reaches the scrapped elongation, the steel wire rope can be replaced, and the electric cabinet 15 can start the photographing assembly 18 to work when the steel wire rope is replaced each time; then, the photographing component 18 can perform nondestructive inspection photographing on the current state of the taper sleeve 102, compare the nondestructive inspection photographing with the fatigue life grade of the taper sleeve preset in the electric cabinet 15, and determine whether the current state of the taper sleeve 102 reaches the preset fatigue life grade of the taper sleeve; if the fatigue life grade of the taper sleeve is not reached, the taper sleeve is continuously used for testing, and if the fatigue life grade of the taper sleeve is reached, the taper sleeve is replaced. Optionally, whether the comparison taper sleeve reaches the fatigue life grade or not may be determined by comparing the weld grade in the nondestructive testing radiograph of the taper sleeve, or may be determined by comparing the size grade of bubbles in the nondestructive testing radiograph of the taper sleeve, and taking the comparison weld grade as an example, the reference standard of the preset fatigue life grade of the taper sleeve may be referred to a grade standard in weld nondestructive testing ultrasonic acceptance grade GB/T29712-2013.
Above-mentioned experiment will utilize the subassembly of shooing to take a photograph the state of taper sleeve when changing wire rope at every turn, see whether the taper sleeve reaches fatigue life, consequently, when the taper sleeve reaches fatigue life and needs to be changed, the staff can clearly know how many sets of wire rope have been changed, can know one set of taper sleeve and just need to be changed with how many sets of wire rope, has confirmed the fatigue life of taper sleeve promptly. Therefore, by utilizing the verification system provided by the embodiment, the working personnel can conveniently and clearly know that the taper sleeve needs to be replaced when a plurality of sets of steel wire ropes are replaced, so that the taper sleeve is prevented from being replaced blindly, social resources are saved, and the maintenance cost of the elevator is also reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A fatigue life verification system for an elevator component, comprising: the device comprises a taper sleeve set with a steel wire rope, a rope wheel set, a power device, a mobile platform, a test bed bracket, an electric cabinet, a distance measuring device electrically connected with the electric cabinet and a pressure sensor; the moving table and the rope wheel set are positioned on the test bed bracket, and the moving table is positioned above the rope wheel set and forms a space with the rope wheel set; the taper sleeve group is positioned in the space and wound on the rope pulley group, and one end of the taper sleeve group is fixedly connected with the mobile station; the power device is fixed on the test bed bracket, and the electric cabinet is electrically connected with the power device;
the power device outputs driving force under the control of the electric cabinet so as to drive the mobile platform to move up and down; the distance measuring device is used for measuring the elongation of the steel wire rope when the steel wire rope moves upwards from the stretched state to the tensioned state, and the pressure sensor is used for measuring the stress of the steel wire rope in the tensioned state and feeding the stress back to the electric cabinet;
the steel wire rope is in a stretched state, namely the steel wire rope is in a stretched state and the elongation is zero.
2. The system of claim 1, wherein the sheave block comprises: the device comprises a rope pulley, a rotating shaft and two rope pulley supports which are oppositely arranged, wherein the two rope pulley supports are fixed on a test bed support;
the rotating shaft penetrates through the two rope wheel brackets, the rope wheel is sleeved on the rotating shaft, and the steel wire rope is wound on the rope wheel;
in an initial state, the steel wire ropes are in a stretched state under the action of the rope wheel, and the length of the steel wire ropes on two sides of the rope wheel is the same.
3. The system of claim 2, wherein the set of cones comprises: the device comprises two taper sleeves, two wedge blocks, a steel wire rope, two lifting eye bolts and two pin shafts;
one end of the lifting eye bolt is inserted into the taper sleeve and connected with the taper sleeve through the pin shaft, and the other end of the lifting eye bolt is fixedly connected with the mobile station; and two ends of the steel wire rope are respectively positioned in the cavity inside the taper sleeve and are fixed in the taper sleeve through wedging of the wedge block.
4. The system of claim 3, wherein the set of cones further comprises a fixture;
the other end of the lifting bolt penetrates through the mobile station and protrudes out of the mobile station; the pressure sensor is sleeved on the part, protruding out of the mobile station, of the lifting bolt, and the fixing piece is used for fixing the pressure sensor and the lifting bolt on the mobile station.
5. The system of claim 1, wherein the power plant comprises: the device comprises a torque motor, a speed reducer, a staggered shaft transmission assembly, a coupler and a ball screw group;
the driving shaft of the torque motor is connected with the staggered shaft transmission assembly through the driving shaft of the speed reducer; the staggered shaft transmission assembly is connected with the ball screw group through a coupler; the torque motor and the speed reducer are electrically connected with the electric cabinet;
the torque motor and the speed reducer horizontally rotate under the electric action of the electric cabinet and generate horizontal power; and the horizontal power is transmitted to the ball screw group under the action of the staggered shaft transmission assembly and the shaft coupling, so that the ball screw group rotates to drive the mobile platform to move up and down.
6. The system of claim 5, wherein the power device further comprises a screw bracket, the coupler is located in a hollow cavity inside the screw bracket, and one end of the ball screw group passes through a through hole in the screw bracket to be connected with the coupler.
7. The system of claim 5, wherein the test stand support comprises: the support comprises a support upper beam, a support base and a guide polished rod, wherein the support upper beam is connected with the support base through the guide polished rod;
the distance measuring device is fixed on the upper beam of the bracket; the power device and the rope wheel set are respectively fixed on the bracket base, and the ball screw set is rotationally connected with the bracket upper beam; the moving table moves up and down along the guide polish rod.
8. The system of claim 7, wherein the mobile station comprises: the device comprises a mobile platform bracket, a ball nut group and a linear bearing; one end of the guide polished rod penetrates through the linear bearing and is connected with the upper beam of the bracket; the other end of the guide polished rod is connected with the bracket base;
the ball screw group penetrates through the ball nut group and is rotationally connected with the upper beam of the bracket; the ball nut group drives the moving platform to move up and down along the guide polish rod under the rotating action of the ball screw group.
9. The system of claim 5, wherein the electrical cabinet comprises: the PLC comprises a PLC programmable logic controller, a torque motor controller and a display screen;
the PLC is electrically connected with the torque motor controller and the display screen; the torque motor controller is electrically connected with the torque motor and the speed reducer.
10. The system according to any one of claims 1-9, further comprising: the photographing component is electrically connected with the electric cabinet;
the photographing assembly is used for photographing the state of the taper sleeve in the taper sleeve set and sending the obtained image to the electric cabinet.
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| CN101598647B (en) * | 2009-07-14 | 2011-06-08 | 中国矿业大学 | Steel wire fretting fatigue testing machine and method |
| CN102128747A (en) * | 2010-10-26 | 2011-07-20 | 江苏赛福天钢绳有限公司 | Device for testing elongation property of steel wire rope for elevator |
| CN105588750B (en) * | 2016-02-19 | 2018-03-16 | 中国矿业大学 | Km deep-well boom hoist cable multiaxis fretting corrosion fatigue damage detection device and method |
| CN106052931B (en) * | 2016-05-18 | 2018-09-14 | 中国矿业大学 | A kind of multi rope winding steel wire rope tension self-balancing testing stand and method |
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