CN116753259B - Resonance type vibration absorption device, energy balance vibration absorption method and shaping method - Google Patents
Resonance type vibration absorption device, energy balance vibration absorption method and shaping method Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
- F16F7/116—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted on metal springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
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- F16F2222/08—Inertia
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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Abstract
The invention provides a resonance type vibration damping device, an energy balance vibration damping method and a shaping method, which belong to the field of field treatment of vibration faults of rotating machinery in the power industry, and comprise the following steps: the first end of the sleeve is opened, and the opening end of the sleeve is connected with a cover plate; the cover plate is fixed to the rotating device; a mass block is arranged in the sleeve, and the mass block is arranged close to the center of the sleeve; the first connecting end of the mass block is connected to the first connecting point of the second end of the sleeve through a first spring; the second connecting end of the mass block is connected with the first vibration absorption point of the cover plate through a second spring; the third connecting end of the mass block is connected to the second connecting point of the second end of the sleeve through the first damper; the fourth connecting end of the mass block is connected with a second vibration absorption point of the cover plate through a second damper. The vibration damping device can be suitable for any vibration damping arrangement mode of rotating equipment, and can effectively restrain the vibration of the rotating equipment by only matching the mass of the device mass block with the dead weight of the rotating equipment through experiments and on-site actual vibration.
Description
Technical Field
The invention belongs to the field of field treatment of vibration faults of rotary machinery in the power industry, and particularly relates to a resonance type vibration damping device, an energy balance vibration damping method and a shaping method.
Background
Rotary machines are major auxiliary devices in the power industry, such as various pumps and fans. In the actual operation process of the site, load reduction or shutdown of the power plant caused by vibration faults of the rotary machinery often occurs, and the operation safety of the power plant is seriously affected. At present, a method for processing vibration faults of a rotary machine mainly comprises the step of adding a counterweight on a rotary part to control the on-site dynamic balance of vibration. But it can only solve the industrial frequency vibration whose vibration frequency is identical to the rotation frequency of equipment, and at the same time it requires a process for stopping equipment operation. There are also cases where vibration treatment is performed by adding a damping damper or a kinetic energy absorber to a stationary member, the former principle being that energy consuming materials are added to the stationary member, and vibration energy transmitted from the stationary member is converted into heat energy of the energy consuming materials, thereby reducing vibration of the rotating apparatus, but the method requires that the weight of the energy consuming materials added to the stationary member is at least 8% of the weight of the rotating apparatus, i.e., for a rotating apparatus having a weight of 1000kg, the required weight of the energy consuming materials is at least 80 kg.
For example, patent number CN201220269780.6 discloses a dynamic vibration absorber of a variable-frequency condensate pump, the document is provided with a vibration absorber, the vibration absorber comprises a cantilever beam and an energy absorption block, the energy absorption block is arranged on one side of the free end of the cantilever beam, the other end of the cantilever beam is fixedly connected with a connecting block, a supporting frame is connected on the connecting block, and the supporting frame is connected with a motor main body or a frame thereof; the number of the vibration absorbers is even, the two vibration absorbers are in a group, each group of two vibration absorbers are symmetrically distributed on two sides of the connecting block, and opposite central lines are positioned on the same straight line; the surface of the cantilever beam (1) is coated with a constraint layer and a damping layer; when the vibration absorber works, the vibration energy is absorbed greatly by the cooperation of the connecting block, the cantilever beam and the energy absorption block under a certain vibration frequency. It can be seen that the document eliminates the vibration of the condensate pump by adding a kinetic energy absorber of a given structure to its stationary part, but the absorber for mounting the document requires a large weight and a layout of the rotary equipment, and cannot utilize a small weight absorber for vibration elimination.
Disclosure of Invention
The invention provides a resonance type vibration damping device, wherein the mass of a device mass block can effectively inhibit the vibration of rotating equipment only by matching with the self weight of the rotating equipment.
The device comprises: the first end of the sleeve is opened, and the opening end of the sleeve is connected with a cover plate; the cover plate is fixed to the rotating device;
a mass block is arranged in the sleeve, and the mass block is arranged close to the center of the sleeve;
the first connecting end of the mass block is connected to the first connecting point of the second end of the sleeve through a first spring;
The second connecting end of the mass block is connected with the first vibration absorption point of the cover plate through a second spring;
the third connecting end of the mass block is connected to the second connecting point of the second end of the sleeve through the first damper;
the fourth connecting end of the mass block is connected with a second vibration absorption point of the cover plate through a second damper.
It should be further noted that the first connection point and the second connection point of the second end of the sleeve do not coincide.
The first vibration absorption point and the second vibration absorption point of the cover plate are not coincident.
It is further noted that the cover plate is bolted to the rotating equipment.
The sleeve is a round cylinder or a rectangular cylinder.
It should be further noted that the method further includes: a vibration elimination processing terminal;
the damping processing terminal obtains a spring stiffness coefficient k, a mass m, a mass design operation amplitude A and a damper damping coefficient C;
defining a spring stiffness coefficient k, and enabling a mass m and a damper damping coefficient C to meet the following relation:
The vibration frequency ω p of the rotating apparatus and the vibration amplitude a p of the rotating apparatus are obtained.
The invention also provides an energy balance vibration elimination method, which comprises the following steps:
Step 1: acquiring the weight M p of the rotating equipment;
The method comprises the following steps: acquiring vibration data of the rotating equipment based on a frequency spectrum analyzer, and performing frequency spectrum analysis to obtain the vibration size A and the vibration frequency f p of the rotating equipment;
step 3: preliminarily selecting the mass m of the mass block;
step 4: the stiffness coefficients k of the first and second springs are calculated separately,
Wherein: omega p is the vibration frequency of the rotating equipment;
step 5: according to the stiffness coefficient k, matching a first spring and a second spring;
Step 6: selecting a mass block, wherein the mass block is made of 304 stainless steel, and the mass m is as follows:
step 7: selecting a first damper and a second damper, wherein damping coefficients of the first damper and the second damper meet the following requirements:
Wherein Ap is the vibration amplitude of the rotating equipment, A is the vibration amplitude of the designed parametric block for parametric vibration, and M is the mass of the parametric block for parametric vibration;
Step 8: packaging and combining the cover plate, the sleeve, the mass block, the first spring, the second spring, the first damper and the second damper to form a vibration damping device, and installing the vibration damping device on rotating equipment;
Step 9: and acquiring vibration data of the rotating equipment, if the vibration data is larger than a preset vibration threshold value, adding a vibration elimination device again until the vibration data of the rotating equipment is lower than the preset vibration threshold value.
In the method, the mass of the mass block is selected, and the mass m=0.005M p is set to be m=10 kg if M >10 kg.
The material of the first spring and the second spring is spring steel not lower than 65Mn, the wire diameter is 3-6 mm, and the number of turns is 2.5-4.5.
The invention also provides a shaping method based on the vibration damping device, which comprises the following steps:
The first stage: analyzing a fault mechanism and making a vibration elimination treatment technical scheme;
(1) Collecting field device installation and debugging data, vibration test data, design data and manufacturer data;
(2) Modeling a fault object based on the collected data, and analyzing a fault mechanism by combining a modal calculation and simulation technology to form a fault analysis report;
(3) On the basis of the fault analysis report, a processing scheme is formulated:
adopting a super-state balance technology to design a resonance type vibration eliminating device aiming at field fault equipment;
Simulating the original vibration phenomenon of the fault object, and performing the application simulation of the resonance type kinetic energy absorber on a computer;
(4) Forming a project processing technical scheme according to the simulation result;
And a second stage: performing field verification processing;
(1) Producing a resonance type vibration damping device;
(2) Performing verification processing on fault equipment, and performing relevant debugging and installation condition correction on the application of the resonance type vibration damping device on site according to the actual condition of the site;
(3) Verifying whether the vibration of the free end of the motor of the fault equipment is in a qualified range, if so, the verification is successful;
And a third stage: and the resonance type vibration damping device is produced by combining the verification of the post-treatment effect, the perfection of the related performance and the on-site installation and modification requirement.
From the above technical scheme, the invention has the following advantages:
The resonance type vibration damping device adopts a compression type double-spring-single mass block-double damping structure, and the mass block does not need to be hung independently due to the supporting function of the compression spring, so that the vibration damping device can work in any direction. The mass blocks of the vibration damping device are enclosed in a round or square cylinder, so that the on-line operation of the mass blocks during vibration damping does not have safety influence on the outside.
The vibration damping device can be suitable for any vibration damping arrangement mode of rotating equipment, and can effectively restrain the vibration of the rotating equipment by only matching the mass of the device mass block with the dead weight of the rotating equipment through experiments and on-site actual vibration.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a resonant vibration damping device;
FIG. 2 is a flow chart of an energy balance damping method;
FIG. 3 is an exemplary diagram of a resonant vibration damping device installation;
FIG. 4 is a simulated time domain diagram of the original vibration of the fan motor;
Fig. 5 is a simulated time domain diagram of vibration after the fan motor is provided with a vibration damping device.
Detailed Description
The resonance type vibration damping device provided by the invention is mainly used for damping the rotation equipment, and can be matched with the rotation equipment to realize vertical arrangement or horizontal arrangement. For example, the vibration damping device can be arranged on a rotating device driven by a centrifugal pump or a rotating device driven by a motor to realize vibration damping treatment.
The vibration damping device according to the invention is shown in fig. 1, which is a schematic diagram illustrating the basic idea of the invention only in a schematic way, and only the components and modules related to the invention are shown in the figure, not according to the number and functions of the components and modules in actual implementation, the functions, numbers and roles of the components and modules in actual implementation can be changed at will, and the functions and uses of the components and modules can be more complex.
The vibration damping device can acquire and process the data related to the vibration damping device before and during the vibration damping process based on an artificial intelligence technology. The method and the device for eliminating vibration can utilize a digital computer, such as machine simulation of a vibration elimination terminal, intelligent extension and expansion of people, sense environment, acquire vibration data and states of rotating equipment, and calculate by using a related model to obtain an optimal result. Of course, the invention also utilizes the technologies of sensor monitoring, data transmission and the like to reflect the data in the running process of the rotating equipment, so as to obtain the vibration absorption effect after the vibration absorption device is installed, and further adjusts the vibration absorption device again based on the actual requirement, so that the vibration absorption requirement is met.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the resonance type vibration damping apparatus includes: the sleeve 1 is provided with an opening at the first end, and the opening end of the sleeve 1 is connected with the cover plate 2; the cover plate 2 is fixed to the rotating device. The cover plate 2 can be fixed to the rotating device by fastening bolts 3. But also to the rotating device by means of a snap-fit connection. Of course, the vibration absorber can be installed at a position with larger vibration quantity of the rotating equipment, so that the vibration absorber can absorb vibration.
Alternatively, the sleeve 1 is a circular cylinder, or a rectangular cylinder. The sleeve 1 may be made of plastic material, stainless steel material, or the like. The cover plate 2 can be connected to the open side of the sleeve 1 by means of a snap-fit or by means of a screw connection.
A mass block 4 is arranged in the sleeve 1, and the mass block 4 is arranged near the center of the sleeve 1; in order to be able to fix the mass 4, a first connection end of the mass 4 is connected to a second end first connection point of the sleeve 1 by means of a first spring 5; the second connecting end of the mass block 4 is connected with a first vibration absorption point of the cover plate 2 through a second spring 6; the second end first connection point of the sleeve 1 is not coincident with the second connection point.
The third connection end of the mass 4 is connected to the second connection point of the second end of the sleeve 1 through a first damper 7; the fourth connection end of the mass block 4 is connected with a second vibration absorption point of the cover plate 2 through a second damper 8. The first vibration damping point and the second vibration damping point of the cover plate 2 are not coincident.
In this way, the user can mount the mass 4 inside the sleeve 1 through the opening of the sleeve 1 and connect the spring and the damper. Here, a hook or a fixed block may be provided inside the sleeve 1, fixedly connecting the spring and the damper.
In one exemplary embodiment, the vibration damping device further includes: a vibration elimination processing terminal; the vibration canceling terminal has a microprocessor, an Application SPECIFIC INTEGRATED Circuit (ASIC), a Programmable gate array (Field-Programmable GATE ARRAY, FPGA), a digital Processor (DIGITAL SIGNAL Processor, DSP), and the like. The shock absorbing processing terminal is intended to represent various forms of digital computers, such as laptops, desktops, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers.
In particular, the vibration damping device of the present invention adopts a compression type double-spring-single mass block-double damping structure, and the mass block 4 does not need to be separately suspended due to the supporting function of the compression spring, so that the vibration damping device can work in any direction. The mass 4 of the vibration damper is enclosed in a circular or square cylinder, so that the on-web operation of the mass 4 during vibration damping does not have a safety influence on the outside. In order to realize the vibration elimination effect, corresponding vibration elimination devices are configured according to related parameters and process states of the rotating equipment.
In the embodiment, a vibration elimination processing terminal acquires a spring stiffness coefficient k, a mass block 4 mass m, a mass block 4 design operation amplitude A and a damper damping coefficient C; the parameters can be manually input by a user, and then calculated by the vibration elimination processing terminal based on a preset mathematical model to further obtain the mass block 4 mass m, the damper coefficient C of the damper and the like. The mass block 4 mass m, the damper damping coefficient C and the like can be automatically matched by the system according to the related parameters of the rotating equipment and the technological state according to preset conditions.
Specifically, a spring stiffness coefficient k is defined, and the mass 4 mass m and the damper damping coefficient C satisfy the following relation:
The vibration frequency ω p of the rotating apparatus and the vibration amplitude a p of the rotating apparatus are obtained.
Thus, the vibration damping device of the present invention can be adapted to any arrangement of rotating equipment, such as a vertical arrangement or a horizontal arrangement. Because the vibration-absorbing components such as the mass block 4 for vibration absorption are all arranged inside the sleeve 1, no exposed operation component exists, the stability is good, and the vibration-absorbing requirement can be met. The invention can be arranged on the static part of the rotary equipment, so that the vibration fault of the rotary equipment can be treated on site without stopping the rotary equipment.
The following is an embodiment of an energy balance damping method provided by an embodiment of the present disclosure, which belongs to the same inventive concept as the resonant damping device of the above embodiments, and details of the embodiment of the energy balance damping method, which are not described in detail, may refer to the embodiment of the resonant damping device.
The method comprises the following steps:
S1: acquiring the weight M p of the rotating equipment; here manually input to the system by the user.
S2: acquiring vibration data of the rotating equipment based on a frequency spectrum analyzer, and performing frequency spectrum analysis to obtain the vibration size A and the vibration frequency f p of the rotating equipment;
S3: preliminarily selecting the mass m of the mass block; wherein the mass m=0.005M p is selected. Of course, if m >10kg, m=10 kg.
S4: the stiffness coefficients k of the first and second springs are calculated separately,
Wherein: omega p is the vibration frequency of the rotating equipment;
S5: according to the stiffness coefficient k, matching a first spring and a second spring; the first spring and the second spring are made of spring steel with the material not lower than 65Mn, the wire diameter is 3-6 mm, and the number of turns is 2.5-4.5.
S6: and selecting a mass block, wherein the mass block is made of 304 stainless steel.
The mass m is calculated by the following formula,
S7: selecting a first damper and a second damper, wherein damping coefficients of the first damper and the second damper meet the following requirements:
wherein A p is the vibration amplitude of the rotating equipment, A is the designed vibration amplitude of the parametric block, and M is the mass of the parametric block;
s8: packaging and combining the cover plate, the sleeve, the mass block, the first spring, the second spring, the first damper and the second damper to form a vibration damping device, and installing the vibration damping device on rotating equipment;
s9: and acquiring vibration data of the rotating equipment, if the vibration data is larger than a preset vibration threshold value, adding a vibration elimination device again until the vibration data of the rotating equipment is lower than the preset vibration threshold value.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
According to the embodiment of the application, the vibration elimination processing terminal can store parameter information of preset rotating equipment, a cover plate, a sleeve, a mass block, a first spring, a second spring, a first damper, a second damper and the like. And a vibration frequency and vibration amplitude trend chart or graph can be constructed, and the vibration elimination effect can be analyzed. The vibration elimination processing terminal is provided with a man-machine operation interface, so that an operator can add data for vibration elimination which is not stored or configured in the system; or modifying or deleting the stored data for damping. The vibration elimination processing terminal also receives a user side control information instruction in real time based on a local area network or a wide area network, and sends relevant data of the vibration elimination process, such as vibration data of the rotating equipment, spectrum analysis data, mass data of a mass block, stiffness coefficient data, vibration amplitude of the rotating equipment, vibration amplitude of a parameter block and the like to the user side. The user is made aware of the current state information.
The energy balance vibration damping method realizes the automation of the vibration damping device, reduces manual intervention and improves the vibration damping effect. And whether the current vibration damping device meets the vibration damping requirement can be obtained by judging that the vibration data is larger than a preset vibration threshold value, and if the vibration data does not meet the vibration damping requirement, the vibration damping device can be additionally arranged again. So as to improve the management level and efficiency of the vibration elimination process, thereby realizing timeliness and scientificity of monitoring, managing and controlling the vibration elimination whole process.
Based on the resonance type vibration damper, the invention also relates to a design process of the resonance type vibration damper, wherein the fuel/gas-steam combined cycle air cooling unit is used for designing the net output 1960 megawatt of the unit, and the resonance type vibration damper comprises two sets of three-to-one combined cycle generator sets, wherein each set of generator sets mainly comprises 3 GE 700FA.05 gas turbines, 3 bypass chimneys, 3 waste heat boilers, 1 GE D600 steam turbines and 1 air cooling island.
Each unit of air cooling island is arranged in 7 columns and x 6 rows, and 42 fin cooling fans are arranged in a matrix. Each fin cooling fan consisted of a motor (185 kW rated, 1785RPM rated asynchronous), a fan (8 blades, 95.10RPM rated) and a speed change gearbox connected between the two. The motor is vertically arranged above the gear box and is connected through a flexible claw coupling with a sleeve. The vertical suspension type fan impeller hub is connected with the output shaft of the gearbox. The blade mounting angle was designed to be 15.5 degrees.
The fault condition is that the non-driving end of the motor generates high-level vibration (the maximum of the vibration exceeds 30 mm/s) when the single fin cooling fan operates, and the vibration is aggravated when the single fin cooling fan operates for a longer time; the motor operating current fluctuates between 20 and 40 amps. The field device has been out of operation for more than a year due to failure.
The fault can exist for a long time to indicate the technical complexity and the difficulty of processing, and in this way, the following three stages are adopted:
The first stage: a fault mechanism analysis and treatment technical scheme is formulated;
(1) Collecting field device installation and debugging data, vibration test data, design data and manufacturer data;
(2) Comprehensively collecting data, modeling a fault object, and analyzing a fault mechanism (requiring reasonable explanation of all phenomena occurring on site) by combining a modal calculation and simulation technology to form a fault analysis report;
(3) On the basis of the fault analysis report, a processing scheme is formulated: as the field vibration is expressed as single-frequency resonance excitation, a super-state balance technology (Ultrustate Balance Technology) is adopted, and a resonance type vibration eliminating device is designed for the field fault equipment. And on the basis of accurately simulating the original vibration phenomenon of the fault object, the operation simulation of the resonance type kinetic energy absorber is performed on a computer.
(4) And forming a project processing technical scheme according to the simulation result.
And a second stage: in-situ validation process
(1) Producing a resonance type vibration damping device;
(2) Performing verification processing on fault equipment, and performing relevant debugging and installation condition correction on the application of the resonance type vibration damping device on site according to the actual condition of the site;
(3) Verifying whether the vibration of the free end of the motor of the fault equipment is in a qualified range, if so, the verification is successful;
(4) And a third stage: and the resonance type vibration damping device is produced by combining the verification of the post-treatment effect, the perfection of the related performance and the on-site installation and modification requirement.
In the embodiment of the invention, in the first stage, the small-amplitude blade passing frequency excitation is considered to be generated in the running process of the machine: from the fan installation test report, the installation angle of each fan blade is 15.5 degrees, and the actual measurement dispersity is within the required range: from an out-of-sync analysis, the fan blades were open enough to produce a small amplitude through-frequency excitation, with blade mounting angle divergence as shown in the table below:
The installation angle of the No. 1 blade of the No. 1 fan of the 1 row is 15.1 degrees different from the installation angle of the No. 7 blade by 0.7 degrees; the installation angle of the No. 2 blades of the No. 2 fan of the 1 row is 15.1 degrees different from the installation angle of the No. 8 blades by 0.8 degrees; the installation angle of the No. 6 blades of the No. 3 fan of the 1 row is 15.1 degrees different from the installation angle of the No. 8 blades by 0.6 degrees; the asynchronization degree exceeds 0.5 degree.
The field actual measurement and the modal analysis show that the self-vibration frequency of the motor is as follows: horizontal 12-13 Hz and vertical 15H; the system has the problems of excitation and self-vibration timing, namely, the motor can generate resonance phenomenon (especially the horizontal direction of the non-driving end of the motor) under the excitation of the passing frequency of the fan blade in the running state.
Due to the reverse transfer effect of the system vibration energy, the motor current also fluctuates periodically, affecting the system transfer torque by affecting the gear mesh.
Since the fan rotating system components are well balanced, i.e. the blade passing frequency is not the result of poor balance of the rotating member, vibration faults cannot be eliminated by a field balance mode.
Mode of eliminating vibration and motor current fluctuation faults on site: because the on-site vibration is expressed as single-frequency Resonance excitation, a Resonance type kinetic energy absorber (Resonance Based KINETIC ENERGY Absorber) specially designed by the company and special super-state balance technology (Ultrustate Balance Technology) is arranged on the motor shell, and opposite-impact type vibration absorption is carried out on the vibration energy of the motor (especially the non-driving end). Therefore, most of vibration (more than 90%) energy of the motor under specific frequency is transferred to the vibration absorber, and the motor vibration can be controlled in an excellent range after an energy feedback channel of the original motor is broken due to the fact that the original motor is resonant vibration, and the vibration absorber with special design also keeps a small vibration state. Considering the possible variable frequency operation of the field device in the future, the specially designed resonant kinetic energy vibration absorber used in the project can check that the vibration of the non-driving end of the motor is smaller than a qualified value within the rotating speed range of 30% -120%, and the vibration of the non-driving end of the motor is smaller than an excellent value within the rotating speed range of 70% -110% (variable frequency main operation area). Because the natural frequencies of the motors in the horizontal direction and the vertical direction are different, the number of the vibration absorbers which are required to be installed by one motor is 2-4 according to actual conditions on site. The installation position of the resonance damping device 9 on the fan motor 10 is shown in fig. 3.
And modeling and simulating the vibration state of the motor vibration system according to the field drawing and the design data so as to identify the characteristic parameters of the motor vibration system. The vibration simulation results are shown in fig. 4.
After the resonant kinetic energy absorber is arranged at the designated position of the motor according to the scheme, the simulation result of the vibration state of the same motor under the same vibration source excitation condition is shown in fig. 5. The simulation result of the fan is satisfied, and the vibration elimination requirement is satisfied. After the resonance type vibration eliminating device is installed, the vibration eliminating effect is realized, and the vibration of the free end of the motor in the horizontal direction is reduced to 2.2mm/s after the treatment from 30mm/s before the treatment within a short time (within 2 seconds).
The units and algorithm steps of each example described in the embodiments disclosed in the resonant vibration damping device and method provided in the present invention can be implemented in electronic hardware, computer software, or a combination of both, and in order to clearly illustrate the interchangeability of hardware and software, each example's composition and steps have been generally described in terms of functions in the above description. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The computer program code for carrying out operations of the present disclosure may be written in various computing modes of embodiments of the invention in one or more programming languages, including but not limited to an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A shaping method based on a vibration damping device is characterized in that the method is shaping the resonance vibration damping device;
the resonance type vibration damping device comprises: the first end of the sleeve is opened, and the opening end of the sleeve is connected with a cover plate; the cover plate is fixed to the rotating device;
a mass block is arranged in the sleeve, and the mass block is arranged close to the center of the sleeve;
the first connecting end of the mass block is connected to the first connecting point of the second end of the sleeve through a first spring;
The second connecting end of the mass block is connected with the first vibration absorption point of the cover plate through a second spring;
the third connecting end of the mass block is connected to the second connecting point of the second end of the sleeve through the first damper;
the fourth connecting end of the mass block is connected with a second vibration absorption point of the cover plate through a second damper;
The first connecting point and the second connecting point of the second end of the sleeve are not overlapped;
the first vibration absorption point and the second vibration absorption point of the cover plate are not overlapped;
the cover plate is fixed on the rotating equipment through bolts;
the sleeve is a round cylinder or a rectangular cylinder;
Further comprises: a vibration elimination processing terminal;
the damping processing terminal obtains a spring stiffness coefficient k, a mass m, a mass design operation amplitude A and a damper damping coefficient C;
defining a spring stiffness coefficient k, and enabling a mass m and a damper damping coefficient C to meet the following relation:
(1)
(2)
obtaining the vibration frequency of the rotating equipment Vibration amplitude of rotary equipment；
The shaping method comprises the following steps:
The first stage: analyzing a fault mechanism and making a vibration elimination treatment technical scheme;
(1) Collecting field device installation and debugging data, vibration test data, design data and manufacturer data;
(2) Modeling a fault object based on the collected data, and analyzing a fault mechanism by combining a modal calculation and simulation technology to form a fault analysis report;
(3) On the basis of the fault analysis report, a processing scheme is formulated:
adopting a super-state balance technology to design a resonance type vibration eliminating device aiming at field fault equipment;
Simulating the original vibration phenomenon of the fault object, and performing the application simulation of the resonance type kinetic energy absorber on a computer;
(4) Forming a project processing technical scheme according to the simulation result;
And a second stage: performing field verification processing;
(1) Producing a resonance type vibration damping device;
(2) Performing verification processing on fault equipment, and performing relevant debugging and installation condition correction on the application of the resonance type vibration damping device on site according to the actual condition of the site;
(3) Verifying whether the vibration of the free end of the motor of the fault equipment is in a qualified range, if so, the verification is successful;
And a third stage: and the resonance type vibration damping device is produced by combining the verification of the post-treatment effect, the perfection of the related performance and the on-site installation and modification requirement.
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| CN101302995A (en) * | 2008-05-21 | 2008-11-12 | 三一电气有限责任公司 | Tuning quality damper vibration damping control device for blower fan |
| CN201751626U (en) * | 2010-04-22 | 2011-02-23 | 浙江吉利汽车研究院有限公司 | Undamped power vibration absorber used for silencer system |
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| CN202628930U (en) * | 2012-06-09 | 2012-12-26 | 刘石 | Frequency conversion condensate pump dynamic vibration absorber |
| CN203384280U (en) * | 2013-06-20 | 2014-01-08 | 上海柴油机股份有限公司 | Power assembly damp auxiliary shock absorber |
| CN205637213U (en) * | 2016-04-18 | 2016-10-12 | 西北工业大学 | Harmonious mass damper damping controlling means of multifrequency |
| JP6830251B2 (en) * | 2017-09-06 | 2021-02-17 | ヤクモ株式会社 | Vibration damping device |
| CN109577361A (en) * | 2018-12-26 | 2019-04-05 | 湖南科技大学 | Frequency damp adjustable two-freedom universal horizontal vibration damping tuned mass damper |
| CN112647609B (en) * | 2020-12-18 | 2021-11-30 | 中铁大桥局集团有限公司 | Self-adaptive variable mass tuned mass damper |
| CN112696837B (en) * | 2020-12-25 | 2022-04-12 | 青岛华丰伟业电力科技工程有限公司 | Debugging and control method for tower type photo-thermal power station |
| CN218582146U (en) * | 2022-05-27 | 2023-03-07 | 大唐南京发电厂 | Vertical rotating equipment vibration damper |
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| CN101302995A (en) * | 2008-05-21 | 2008-11-12 | 三一电气有限责任公司 | Tuning quality damper vibration damping control device for blower fan |
| CN201751626U (en) * | 2010-04-22 | 2011-02-23 | 浙江吉利汽车研究院有限公司 | Undamped power vibration absorber used for silencer system |
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