A semi-active composite vibration absorber for elevator traction machine vibration reduction

Abstract

The present invention relates to a semi-active composite vibration absorber for elevator traction machine vibration reduction, which includes a vibration absorber, a vibration absorber installation base, a three-axis acceleration sensor, a vibration isolator, an oil mass control system and an oil pipe. The elevator traction machine is installed on the vibration absorber installation base, the vibration absorber installation base is installed on the vibration isolator, the three-axis acceleration sensor is installed on the vibration absorber installation base, the vibration absorber is connected to the vibration absorber installation base, and the oil mass control system is connected to the vibration absorber through the oil pipe to adjust the oil mass in the vibration absorber. This device is beneficial to reducing the vibration of the elevator traction machine.

Description

Technical Field

[0001] The present invention belongs to the technical field of vibration damping, and particularly relates to a semi-active composite vibration absorber for elevator traction machine vibration damping. Background Art

[0002] With the continuous development of the economic society, people's social life and working space are also continuously developing in depth. As an efficient vertical transportation tool, the elevator plays an indispensable role in people's daily life. The traction machine, as the power source of the elevator, is the core of the elevator traction system. Eccentric problems generated during the installation and manufacturing process of the motor in the traction machine, wear of the traction wheel after long-term operation, and roundness errors of the traction wheel usually cause relatively strong vibrations. In particular, it should be noted that every time the elevator runs to the required stopping floor, due to the sudden braking of the traction wheel and the traction rope, the elevator traction machine will generate periodic vibrations near its natural frequency.

[0003] The vibrations generated by the traction machine will not only be transmitted to the car where the passengers are located through the traction rope, bringing certain pressure to the passengers' bodies and minds, but also be transmitted to the surrounding housing along the floor and walls of the machine room where the traction machine is located, seriously interfering with the daily life of the residents. Moreover, long-term vibrations will also damage the traction machine and other components of the elevator. Therefore, it is extremely important to attenuate the vibrations of the traction machine, and the vibration damping device of the traction machine has become one of the essential components in the elevator.

[0004] Currently, almost all the vibration damping solutions adopted in the market are to install rubber vibration dampers at the bottom of the traction machine. However, the heat resistance and fatigue resistance of ordinary rubber are not very good, and the machine room environment where the traction machine works is harsh. The rubber is extremely prone to aging and cracking, reducing its vibration damping performance, and it cannot effectively attenuate the periodic vibrations generated when the elevator runs and stops at the floors.

[0005] In addition, the traction machine vibration damper almost bears the entire mass of the traction machine and other components of the elevator. Therefore, designing a vibration absorber that can work for a long time, can both bear and effectively adaptively absorb periodic vibrations, and can mitigate the impact on the traction machine has become an inevitable need in the elevator field. Summary of the Invention

[0006] The purpose of the present invention is to provide a semi-active composite vibration absorber for elevator traction machine vibration damping, which is beneficial to reducing the vibrations of the elevator traction machine.

[0007] To achieve the above object, the technical solution adopted by the present invention is: a semi-active composite vibration absorber for elevator traction machine vibration reduction, including a vibration absorber, a vibration absorber mounting base, a three-axis acceleration sensor, a vibration isolator, an oil mass control system, and an oil pipe. The elevator traction machine is installed on the vibration absorber mounting base, the vibration absorber mounting base is installed on the vibration isolator, the three-axis acceleration sensor is installed on the vibration absorber mounting base, the vibration absorber is connected to the vibration absorber mounting base, and the oil mass control system is connected to the vibration absorber through the oil pipe to adjust the oil mass in the vibration absorber.

[0008] Further, corresponding to the four feet of the elevator traction machine, the semi-active composite vibration absorber includes four vibration absorbers, four vibration absorber mounting bases, four three-axis acceleration sensors, and four vibration isolators. The four feet of the elevator traction machine are respectively installed on the four vibration absorber mounting bases.

[0009] Further, the vibration absorber mainly consists of a cantilever beam, an I-shaped mass block, a lower metal rubber block, an upper metal rubber block, a metal rubber block pressing plate, and a mass block mounting fastener. An opening groove is provided in the middle of the cantilever beam along the length direction. The middle of the I-shaped mass block has a through hole. The mass block mounting fastener passes through the opening groove and the through hole in the middle of the I-shaped mass block to fixedly connect the cantilever beam and the I-shaped mass block together. The I-shaped mass block has an internal cavity for filling oil. Oil ports communicating with the internal cavity are respectively provided on the left and right sides of the I-shaped mass block. The oil ports are respectively connected to the oil mass control system through oil pipes. The upper metal rubber block and the lower metal rubber block are respectively arranged on the upper and lower sides of one end of the cantilever beam. The metal rubber block pressing plate is pressed on the upper side of the upper metal rubber block. The metal rubber block pressing plate, the upper metal rubber block, the cantilever beam, and the lower metal rubber block are fixedly connected to the vibration absorber mounting base through the first bolt fastener for preloading.

[0010] Further, the cantilever beam is a serrated cantilever beam with a serrated structure on one surface. The middle surface of the I-shaped mass block has a rib structure matching the serrated structure to ensure that the I-shaped mass block does not slip and detach during vibration.

[0011] Further, the bottom surface of the cantilever beam has a certain angle with the horizontal plane. The size of the angle is set according to the predetermined stiffness in each direction, so that the stiffness of the cantilever beam is decomposed into the stiffness in two orthogonal directions, and the natural frequencies of the vibration absorber in the vertical and horizontal directions are adapted to the natural frequencies of the elevator traction machine in the corresponding directions.

[0012] Further, the vibration absorber mounting base is an integral component. The vibration absorber mounting base is provided with a cantilever beam connection hole for connecting the cantilever beam through the first bolt fastener and a traction machine connection hole for connecting the elevator traction machine through the second bolt fastener.

[0013] Furthermore, the vibration isolator is a two-stage vibration isolation structure, including a shell, a high-density metal rubber-silicone rubber composite material, a low-density metal rubber-silicone rubber composite material, an intermediate pressure cover, an upper pressure cover and an end cover. A plurality of guide columns are vertically arranged in the shell. The high-density metal rubber-silicone rubber composite material is arranged in a groove on the bottom surface of the middle part of the shell. The intermediate pressure cover passes through the guide column and is pressed on the high-density metal rubber-silicone rubber composite material, and the intermediate pressure cover is locked on the guide column by an intermediate locking nut to pre-press the high-density metal rubber-silicone rubber composite material; the low-density metal rubber-silicone rubber composite material is arranged in the intermediate pressure cover. The cover is mounted on the upper end of the housing, the upper end pressure cover passes through the guide column and is pressed on the low-density metal rubber-silicone rubber composite material, and the upper end pressure cover is locked on the guide column by the upper end locking nut to pre-press the low-density metal rubber-silicone rubber composite material; the portion of the guide column that cooperates with the intermediate locking nut and the upper end locking nut has a thread; the end cover and the housing are fixedly connected by bolts, the bearing end of the upper part of the upper end pressure cover passes through the end cover, and the upper end surface of the bearing end is provided with a threaded countersunk hole to connect the vibration absorber mounting base and the elevator traction machine by bolts; the lower end of the housing is provided with a bottom through hole, and is connected to the bottom base of the traction machine by bolts.

[0014] Furthermore, the radial dimensions of the middle grooves of the shell, the middle gland, and the upper gland are all larger than the radial dimensions of the low-density metal rubber-silicone rubber composite material and the high-density metal rubber-silicone rubber composite material, so as to reserve a portion of gap to prevent the low-density metal rubber-silicone rubber composite material and the high-density metal rubber-silicone rubber composite material from squeezing the inner wall after being compressed and expanded.

[0015] Furthermore, the oil quality control system includes an oil storage tank, an electric regulating valve, an electric pump, a flow sensor and a controller. The controller controls the operation of the electric pump and the electric regulating valve through signals detected by the three-way acceleration sensor and the flow sensor, thereby adjusting the oil quality in the I-shaped mass block.

[0016] Compared with existing technologies, the present invention has the following advantages: It provides a semi-active composite vibration absorption device for elevator traction machine vibration reduction, resolving the problems of traditional elevator traction machine vibration absorbers, which easily degrade in vibration reduction performance in harsh environments and fail to effectively attenuate periodic vibrations generated when the elevator stops at a certain floor. While utilizing the vibration absorber to achieve vibration absorption, the device also utilizes the vibration isolator to attenuate vertical vibration impacts. Furthermore, to better adapt to vibrations in different frequency bands, the flow of oil in the vibration absorber is actively controlled, adaptively adjusting the absorber's mass to achieve precise regulation of the absorber's natural frequency, thereby fully utilizing the absorber's vibration absorption capacity. Therefore, the present invention has strong practicality and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the device according to an embodiment of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the vibration absorber in an embodiment of the present invention.

[0019] Figure 3 It is a schematic external structural diagram of the I-shaped mass block in an embodiment of the present invention.

[0020] Figure 4 It is a schematic internal structural diagram of the I-shaped mass block in an embodiment of the present invention.

[0021] Figure 5 It is a schematic structural diagram of the installation base of the vibration absorber in an embodiment of the present invention.

[0022] Figure 6 It is a schematic structural diagram of the installation base of the vibration absorber in an embodiment of the present invention (from another perspective).

[0023] Figure 7 It is a schematic external structural diagram of the vibration isolator in an embodiment of the present invention.

[0024] Figure 8 It is a schematic internal structural diagram of the vibration isolator in an embodiment of the present invention. Detailed implementation manners

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0027] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] As Figure 1As shown in the figure, this embodiment provides a semi-active composite vibration absorber for elevator traction machines, which includes a vibration absorber 2, a vibration absorber mounting base 3, a three-axis acceleration sensor 4, a vibration isolator 5, an oil mass control system 6, and an oil pipe 8. The elevator traction machine 1 is installed on the vibration absorber mounting base 3, the vibration absorber mounting base 3 is installed on the vibration isolator 5, the three-axis acceleration sensor 4 is installed on the vibration absorber mounting base 3, the vibration absorber 2 is connected to the vibration absorber mounting base 3, and the oil mass control system 6 is connected to the vibration absorber 2 through the oil pipe 8 to adjust the oil mass in the vibration absorber.

[0029] In this embodiment, the elevator traction machine 1 has four feet. Corresponding to the four feet of the elevator traction machine, the semi-active composite vibration absorber includes four vibration absorbers 2, four vibration absorber mounting bases 3, four three-axis acceleration sensors 4, and four vibration isolators 5. The four feet of the elevator traction machine 1 are respectively installed on the four vibration absorber mounting bases 3.

[0030] As Figures 2 - 4 shown in the figure, the vibration absorber mainly consists of a cantilever beam 202, an I-shaped mass 205, a lower metal rubber block 208, an upper metal rubber block 209, a metal rubber block pressing plate 210, and mass mounting fasteners (including a mass mounting bolt 203 and a mass mounting nut 204). An opening slot 207 is provided in the middle of the cantilever beam 202 along the length direction. The middle of the I-shaped mass 205 has a through hole. The mass mounting bolt 203 passes through the opening slot 207 and the through hole in the middle of the I-shaped mass 205 and cooperates with the mass mounting nut 204 to fixedly connect the cantilever beam 202 and the I-shaped mass 205 together. The I-shaped mass 205 has an internal cavity for filling oil. Oil ports 206 communicating with the internal cavity are respectively provided on the left and right sides of the I-shaped mass 205. The oil ports 206 are respectively connected to pipe connectors 7, and the pipe connectors 7 are further connected to the oil mass control system 6 through the oil pipe 8. The upper metal rubber block 209 and the lower metal rubber block 208 are respectively provided on the upper and lower sides of one end of the cantilever beam 202. The metal rubber block pressing plate 210 is pressed on the upper side of the upper metal rubber block 209. The metal rubber block pressing plate 210, the upper metal rubber block 209, the cantilever beam 202, and the lower metal rubber block 208 are fixedly connected to the vibration absorber mounting base 3 through the first bolt fasteners for preloading. The metal rubber block provides the damping unit of the vibration absorber. When the cantilever beam vibrates, tensile or compressive deformation occurs, thereby absorbing vibration energy. When the cantilever beam 202 vibrates, one of the two metal rubber blocks 209 and 208 is always compressed and the other is always stretched, ensuring the reliability of the bolt connection.

[0031] In this embodiment, the cantilever beam 202 is a serrated cantilever beam with a serrated structure on one side surface. The intervals between each serration are relatively small, ensuring that the mass block will not slip or break away during vibration. Moreover, by changing the mating position of the mass block thereon, preliminary adjustment of the stiffness of the vibration absorber can be achieved. One end of the cantilever beam 202 for connecting the vibration absorber mounting base 3 is provided with two through holes for bolt connection with the vibration absorber mounting base 3. The middle surface of the I-shaped mass block 205 has a rib structure that mates with the serrated structure to ensure that the I-shaped mass block will not slip or break away during vibration. The internally cavity of the I-shaped mass block that penetrates left and right is used to hold the oil. The mass of the oil therein can be controlled through the control system.

[0032] In this embodiment, the bottom surface of the cantilever beam has a certain angle with the horizontal plane. The size of the angle is set according to the predetermined stiffness in each direction, so that the stiffness of the cantilever beam is decomposed into the stiffness in two orthogonal directions, making the natural frequencies of the vibration absorber in the vertical and horizontal directions adapt to the natural frequencies of the elevator traction machine in the corresponding directions.

[0033] As Figure 5 , 6 shown, the vibration absorber mounting base 3 is an integral component. The vibration absorber mounting base 3 is provided with a cantilever beam connection hole for connecting the cantilever beam 202 through a first bolt fastener and a traction machine connection hole for connecting the elevator traction machine through a second bolt fastener. In this embodiment, the traction machine connection hole includes a larger hole 301 in the middle of the upper bottom surface and the remaining smaller holes 303. Among them, the larger hole 301 in the middle of the upper bottom surface is used to cooperate with the threaded hole at the upper end of the vibration isolator. That is, during installation, the larger hole 301 in the middle is concentric with the threaded counterbore 511 of the vibration isolator, and the vibration absorber mounting base 3 is sleeved on the vibration isolator 5, so that the bearing end 512 is in contact with the surface where the inner port of the larger hole 301 in the middle is located. The larger hole 301 in the middle is a through hole without threads. The bolt passes through the non-threaded through hole on the traction machine base, the larger hole 301 in the middle and the threaded counterbore 511 in sequence, thereby locking the vibration isolator 5 and the vibration absorber mounting base 3 to the traction machine 1. The remaining smaller holes 303 on the upper bottom surface are connected to the traction machine through bolts to form a fixing effect.

[0034] As Figure 7 , 8As shown, the vibration isolator 5 is a two-stage vibration isolation structure, including a housing 501, a high-density metal rubber-silicone rubber composite material 505, a low-density metal rubber-silicone rubber composite material 506, an intermediate gland 504, an upper gland 507 and an end cap 510. A plurality of guide posts 502 are vertically arranged in the housing 501. The high-density metal rubber-silicone rubber composite material 505 is arranged in the bottom groove in the middle of the housing 501. The intermediate gland 504 passes through the guide posts 502 and presses on the high-density metal rubber-silicone rubber composite material 505, and the intermediate gland 504 is locked on the guide posts 502 through an intermediate locking nut 503 to pre-compress the high-density metal rubber-silicone rubber composite material 505. The low-density metal rubber-silicone rubber composite material 506 is arranged in the upper groove of the intermediate gland 504. The upper gland 507 passes through the guide posts 502 and presses on the low-density metal rubber-silicone rubber composite material 506, and the upper gland 507 is locked on the guide posts 502 through an upper locking nut 508 to pre-compress the low-density metal rubber-silicone rubber composite material 506. The parts of the guide posts 502 that cooperate with the intermediate locking nut 503 and the upper locking nut 508 have threads. The end cap 510 and the housing 501 are fixedly connected by bolts. The bearing end 512 on the upper part of the upper gland 507 passes through the end cap 510, and a threaded counterbore 511 is provided on the upper end surface of the bearing end 512 to connect the absorber mounting base and the elevator traction machine through bolts. An oval bottom through hole is provided at the lower end of the housing 501, and the bottom base of the traction machine is connected by bolts.

[0035] When the traction machine is working, it will transmit vibration to the bearing end 512 of the upper gland 507 and generate a certain movement trend. When a small downward extrusion force is generated at the bearing end 512, the pressure is transmitted to the low-density metal rubber-silicone rubber composite material 506, and the low-density metal rubber-silicone rubber composite material 506 will be further compressed on the basis of pre-tightening, while the high-density metal rubber-silicone rubber composite material 505 will only produce a small deformation. When a large downward extrusion force is generated at the bearing end 512, the low-density metal rubber-silicone rubber composite material 506 approaches the limit of the extrusion deformation amount, and the high-density metal rubber-silicone rubber composite material 505 will also produce a large deformation. Through the combination of the low-density metal rubber-silicone rubber composite material 506 and the high-density metal rubber-silicone rubber composite material 505, a multi-stage adjustment system is formed to reduce the vibration amplitude.

[0036] In this embodiment, the radial dimensions of the middle grooves of the housing 501, the middle gland 504, and the upper gland 507 are all larger than the radial dimensions of the low-density metal rubber-silicone rubber composite material 506 and the high-density metal rubber-silicone rubber composite material 505, so as to reserve a part of the gap to prevent the low-density metal rubber-silicone rubber composite material 506 and the high-density metal rubber-silicone rubber composite material 505 from extruding the inner wall after being compressed and expanded.

[0037] Since the total weight of structures such as the traction machine and the car is very large, the stiffness element of the vibration isolator must ensure appropriate stiffness requirements and minimize the volume as much as possible. The silicone rubber is filled into the pores of the metal rubber by vacuum infiltration technology to form a coating, and a high-performance metal rubber-silicone rubber continuous interpenetrating phase composite material (MES-SRC) is prepared. This material is used as the stiffness and damping elements of the vibration isolator for large-load traction machines. Compared with traditional composite materials and single materials, this continuous interpenetrating phase composite material has excellent damping performance while maintaining a large stiffness. When using a single metal rubber material, a large number of metal wires are required to meet the stiffness requirements, which will lead to problems in preparation such as difficulty in stamping. Therefore, using this material avoids this problem.

[0038] In this embodiment, the oil quality control system 6 mainly consists of an oil storage tank, an electric control valve, an electric pump, a flow sensor, and a controller. The oil storage tank is sequentially connected to the electric control valve, the electric pump, and the flow sensor, and then connected to the shock absorber 2 through the oil pipe 8. The signal input end of the controller is connected to the triaxial acceleration sensor and the flow sensor, and the control output end is connected to the electric pump and the electric control valve, so as to control the operation of the electric pump and the electric control valve through the signals detected by the triaxial acceleration sensor and the flow sensor, thereby adjusting the oil quality in the I-beam mass block.

[0039] During installation, the high-density metal rubber-silicone rubber composite material 505 is placed in the middle groove of the housing 501. The middle gland 504 passes through the guide post 502 and presses on the high-density metal rubber-silicone rubber composite material 505, and the high-density metal rubber-silicone rubber composite material 505 is pre-compressed with the middle locking nut 503. The low-density metal rubber-silicone rubber composite material 506 is placed in the upper groove of the middle gland 504. The upper gland 507 passes through the guide post 502 and presses on the low-density metal rubber-silicone rubber composite material 506, and the low-density metal rubber-silicone rubber composite material 506 is pre-compressed with the upper locking nut 508. The bolt 509 is used for the fixed connection between the end cover 510 and the housing 501. Four oval through holes are opened at the lower end of the housing 501, and the bottom base of the traction machine is connected by bolts. A threaded counterbore 511 is opened on the upper end face, and the shock absorber installation base 3 and the traction machine 1 are connected by bolts.

[0040] Next, fit the contact surface between the vibration absorber mounting base 3 and the lower part of the traction machine 1, and install each fixing bolt. Secondly, assemble the mass block 205 to the appropriate position of the cantilever beam 202 through two bolts 203 and two nuts 204. Next, place the lower metal rubber block 208 at the position where it matches the two through holes 302 in the groove of the vibration absorber mounting base 3, then press the cantilever beam 202 on the lower metal rubber block 208, and then place the upper metal rubber block 209 at the mating position on the cantilever beam 202. Then press the metal rubber block pressing plate 210 on the upper metal rubber block 209 and fix it at the position of the two through holes 302 in the groove on the vibration absorber mounting base 3 through two bolts and nuts to pre-compress the lower metal rubber block 208 and the upper metal rubber block 209. Finally, fit the contact surface between the vibration isolator 5 and the vibration absorber mounting base 3, and the larger hole 301 in the middle of the upper bottom surface of the vibration absorber mounting base 3 is mated with the threaded counterbore 511 of the vibration isolator 5, and it is screwed and connected to the traction machine 1 through bolts. Then connect each metal hose (oil pipe) 8 to the pipe port 206 with a pipe connector 7, and then the oil pipe is connected to the oil mass control system 6, where the electric pump and the electric control valve are both connected to the controller through circuit connection wires, and the three-axis acceleration sensor 4 and the flow sensor are connected to the controller through circuit connection wires. Thus, all installations are completed.

[0041] When there is a large deviation between the natural frequency of the vibration absorber 2 and the vibration frequency of the traction machine 1, resulting in the vibration absorber 2 being unable to effectively absorb vibration, the vibration frequency of the traction machine 1 can be obtained through the three-axis acceleration sensor 4, etc. Then, the required length is calculated through the stiffness derivation formula of the cantilever beam 202, and the mass block 205 is adjusted to the nearest position to this length. At this time, if the engineering requirements still cannot be met, that is, the required natural frequency cannot be achieved, the controller controls the electric pump and the electric control valve through the signals fed back by the three-axis acceleration sensor 4 and the flow sensor, thereby adjusting the oil mass in the mass block 205 to more precisely adjust the natural frequency of the vibration absorber 2 to achieve a very ideal natural frequency. Finally, precise frequency modulation is realized, and the vibration absorption capacity of the vibration absorber 2 is fully exerted.

[0042] The present invention installs a composite vibration absorption device composed of a vibration isolator and a vibration absorber at the bottom of the traction machine. The vibration absorber adopts a cantilever beam and an I-shaped mass block structure, and metal rubber is added. This device has the following advantages:

[0043] 1) The cantilever beam of the vibration absorber is designed as a serrated structure, and each serration has a small interval, which can realize the preliminary adjustment of the stiffness and natural frequency of the vibration absorber. The I-shaped mass block is provided with a serrated structure that matches the cantilever beam, so that when large vibrations occur, the mass block can be stably clamped on the cantilever beam.

[0044] 2) The angle between the bottom surface of the cantilever beam and the horizontal plane is designed to be a certain angle according to the stiffness requirements predetermined in each direction. Then, the stiffness of the cantilever beam can be decomposed into the stiffness in two orthogonal directions, so that the natural frequencies of the vibration absorber in the vertical direction and the two horizontal directions are adapted to the natural frequencies of the main system in the corresponding directions. This ensures that the vibration absorber can not only absorb the vibration in the vertical direction, but also absorb the vibration in the two horizontal directions, realizing the three-way vibration absorption function of the vibration absorber.

[0045] 3) The mass block is a hollow through structure. The mass of the oil contained in it is precisely adjusted through a controller, etc., and in cooperation with the adjustment of the effective length of the cantilever beam, the further precise adjustment of the natural frequency is realized, so as to absorb the periodic vibration of the traction machine more effectively.

[0046] 4) Two-stage vibration isolators are introduced. A multi-stage adjustment system is formed through the combination of low-density metal rubber-silicone rubber composite materials and high-density metal rubber-silicone rubber composite materials, which can play a good role in vibration isolation and shock prevention when the traction machine has large vibrations or impacts in the vertical direction.

[0047] 5) The silicone rubber is filled into the pores of the metal rubber by using the vacuum infiltration technology to form a coating, and a high-performance metal rubber-silicone rubber continuous interpenetrating phase composite material (MES-SRC) is prepared. This material is used as the stiffness and damping elements of the vibration isolator for large-load traction machines. Compared with traditional composite materials and single materials, this continuous interpenetrating phase composite material has excellent damping performance while maintaining a large stiffness. When using a single metal rubber material, a large number of metal wires are required to meet the stiffness requirements, which will lead to problems in preparation such as difficult stamping. Therefore, using this material avoids this problem.

[0048] 6) This device is convenient for disassembly and assembly, does not affect the normal operation of the traction machine, and has good engineering application capabilities.

[0049] The above are only the preferred embodiments of the present invention, and it is not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A semi-active composite vibration absorber for elevator traction machine vibration reduction, characterized in that, It includes a vibration absorber, a vibration absorber mounting base, a three-axis acceleration sensor, a vibration isolator, an oil quality control system and an oil pipe. The elevator traction machine is installed on the vibration absorber mounting base, the vibration absorber mounting base is installed on the vibration isolator, the three-axis acceleration sensor is installed on the vibration absorber mounting base, the vibration absorber is connected to the vibration absorber mounting base, and the oil quality control system is connected to the vibration absorber through the oil pipe to adjust the oil quality in the vibration absorber; The vibration absorber is mainly composed of a cantilever beam, an I-shaped mass block, a lower metal rubber block, an upper metal rubber block, a metal rubber block pressing plate and a mass block mounting fastener. An opening groove is provided in the middle of the cantilever beam along the length direction, a through hole is provided in the middle of the I-shaped mass block, and the mass block mounting fastener passes through the opening groove and the through hole in the middle of the I-shaped mass block to fixedly connect the cantilever beam and the I-shaped mass block together; an internal cavity for filling oil is provided in the I-shaped mass block, and oil ports communicating with the internal cavity are respectively provided on the left and right sides of the I-shaped mass block, and the oil ports are respectively connected to the oil quality control system through oil pipes; the upper metal rubber block and the lower metal rubber block are respectively arranged on the upper and lower sides of one end of the cantilever beam, and the metal rubber block pressing plate is pressed on the upper side of the upper metal rubber block, and the metal rubber block pressing plate, the upper metal rubber block, the cantilever beam and the lower metal rubber block are fixedly connected to the vibration absorber mounting base through the first bolt fastener for preloading; The vibration isolator is a two-stage vibration isolation structure, including a housing, a high-density metal rubber-silicone rubber composite material, a low-density metal rubber-silicone rubber composite material, an intermediate gland, an upper gland and an end cover. A plurality of guide columns are vertically arranged in the housing, the high-density metal rubber-silicone rubber composite material is arranged in the bottom groove in the middle of the housing, the intermediate gland passes through the guide columns and presses on the high-density metal rubber-silicone rubber composite material, and the intermediate gland is locked on the guide columns through an intermediate locking nut to preload the high-density metal rubber-silicone rubber composite material; the low-density metal rubber-silicone rubber composite material is arranged on the intermediate gland, the upper gland passes through the guide columns and presses on the low-density metal rubber-silicone rubber composite material, and the upper gland is locked on the guide columns through an upper locking nut to preload the low-density metal rubber-silicone rubber composite material; the parts of the guide columns cooperating with the intermediate locking nut and the upper locking nut have threads; the end cover and the housing are fixedly connected by bolts, the bearing end on the upper part of the upper gland passes through the end cover, and a threaded counterbore is provided on the upper end surface of the bearing end to connect the vibration absorber mounting base and the elevator traction machine through bolts; a bottom through hole is provided at the lower end of the housing and is connected to the bottom base of the traction machine through bolts.

2. The semi-active composite vibration absorber for elevator traction machine vibration reduction according to claim 1, characterized in that, Corresponding to the four feet of the elevator traction machine, the semi-active composite vibration absorption device includes four vibration absorbers, four vibration absorber mounting bases, four three-axis acceleration sensors and four vibration isolators, and the four feet of the elevator traction machine are respectively installed on the four vibration absorber mounting bases.

3. A semi-active composite vibration absorber for elevator traction machine vibration reduction according to claim 1, characterized in that, The cantilever beam is a serrated cantilever beam with a serrated structure on one side surface. The middle surface of the I-shaped mass block has a rib structure that cooperates with the serrated structure to ensure that the I-shaped mass block does not slip or disengage during vibration.

4. A semi-active composite vibration absorber for elevator traction machine vibration reduction according to claim 1, characterized in that, The bottom surface of the cantilever beam has a certain angle with the horizontal plane. The size of the angle is set according to the predetermined stiffness in each direction, so that the stiffness of the cantilever beam is decomposed into the stiffness in two orthogonal directions, making the natural frequencies of the vibration absorber in the vertical and horizontal directions adapt to the natural frequencies of the elevator traction machine in the corresponding directions.

5. A semi-active composite vibration absorber for elevator traction machine vibration reduction according to claim 1, characterized in that, The vibration absorber mounting base is an integral component. The vibration absorber mounting base is provided with a cantilever beam connection hole for connecting the cantilever beam through a first bolt fastener and a traction machine connection hole for connecting the elevator traction machine through a second bolt fastener.

6. The semi-active composite vibration absorber for elevator traction machine vibration reduction according to claim 1, characterized in that, The radial dimensions of the middle grooves of the housing, the middle gland, and the upper gland are all larger than the radial dimensions of the low-density metal rubber-silicone rubber composite material and the high-density metal rubber-silicone rubber composite material, so as to reserve a part of the gap to prevent the low-density metal rubber-silicone rubber composite material and the high-density metal rubber-silicone rubber composite material from squeezing the inner wall after being compressed and expanded.

7. A semi-active composite vibration absorber for elevator traction machine vibration reduction according to claim 1, characterized in that, The oil mass control system includes an oil storage tank, an electric control valve, an electric pump, a flow sensor, and a controller. The controller controls the operation of the electric pump and the electric control valve through the signals detected by the three-axis acceleration sensor and the flow sensor, so as to adjust the oil mass in the I-shaped mass block.

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