CN103712682A - Vertical shaft hoist main shaft vibration detection method based on finite element analysis method - Google Patents

Vertical shaft hoist main shaft vibration detection method based on finite element analysis method Download PDF

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Publication number
CN103712682A
CN103712682A CN201310656475.1A CN201310656475A CN103712682A CN 103712682 A CN103712682 A CN 103712682A CN 201310656475 A CN201310656475 A CN 201310656475A CN 103712682 A CN103712682 A CN 103712682A
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CN
China
Prior art keywords
vibration
finite
data
signal
algorithm
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CN201310656475.1A
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Chinese (zh)
Inventor
张宏忠
杨行
徐辉
王长春
解波
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安徽恒源煤电股份有限公司
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Priority to CN201310656475.1A priority Critical patent/CN103712682A/en
Publication of CN103712682A publication Critical patent/CN103712682A/en

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Abstract

The invention discloses a vertical shaft main shaft vibration detection method based on a finite element analysis method. According to the special structure of a vertical shaft hoist, an integrated vibration transmitter is adopted to detect data of the vibration frequency amplitude of a hoist main shaft, the transmitter is adopted to convert a vibration signal to a 4-20MA analog signal to be transmitted to a field S7-300PLC, then after processing through the PLC, an RS485 bus is adopted to convert the processed signal to a TCP/IP Ethernet signal which can be recognized on a PC through a CP343-1LEAN bus converter, the signal is further transmitted to an upper computer located inside a monitoring room through an underground ring network, received by Kingview software in the upper computer and then transmitted to a finite element algorithm model with built-in MATLAB software, relatively accurate early warning of a future development tread is obtained through calculation, data are displayed on the upper computer in real time, and safe operation of the hoist is monitored in real time through a PC of the monitoring room, so that safety and stability of coalmine production are ensured. The vertical shaft main shaft vibration detection method based on the finite element analysis method starts from safety of the vertical shaft hoist, in combination with the actual situation of daily running, and makes full use of the advantages of the finite element algorithm to predict the running state of the hoist, so as to realize timely warning and repair when an accident does not happen, and thus ensure the safety of underground workers.

Description

Main hoist spindle vibration monitoring method based on limited element analysis technique
Technical field
The present invention relates to mine vertical shaft hoist security improvement detection method field, be specially a kind of vertical shaft hoist spindle vibration detection method based on limited element analysis technique.
Background technology
Hoister is colliery visual plant, and can it safe and stable operation be directly connected to the safety in production in colliery.What yet the colliery of China was used mostly is tower multirope friction winder, the main shaft device of main shaft hooist motor and head sheave are as main load bearing component, its operation conditions whether normal efficiency and safety that directly impact is produced, be related to stablizing and safety of whole system.
Find according to the study, more than 70% rotating machinery fault causes by vibration, and vibrational state is a key factor weighing running state of rotating machine quality.Vibrate excessive harm extremely many, it can directly cause mechanical accident.In the past, only the operation at hoister goes wrong or takes equipment inspection apart, just knows that in machine, fault has occurred certain part.In order to ensure the normal operation of machine, the regulation of having to scheduled maintenance inspection system is not only uneconomical but also unreasonable.
Summary of the invention
The object of this invention is to provide a kind of vertical shaft hoist spindle vibration detection method based on limited element analysis technique and carry out remote real time monitoring, to solve prior art inefficiency, cannot realize the problem of Real-Time Monitoring vertical shaft hoist safe operation situation.
In order to achieve the above object, the technical solution adopted in the present invention is:
Vertical shaft hoist spindle vibration detection method based on limited element analysis technique, it is characterized in that: based on remote control technology, and adopt transmitter to transfer vibration signal to 4-20MA simulating signal to send on-the-spot S7-300PLC to, then after processing, PLC adopt RS485 bus through CP343-1LEAN bus converter, to convert the TCP/IP ethernet signal that can identify on PC to, and then send into and be arranged in the host computer of Control Room and receive by the KingView software of host computer the finite element algorithm model that is then transferred to built-in MATLAB software through down-hole looped network, through calculation, obtain future developing trend early warning more accurately, and data are presented on host computer in real time, comprise the following steps:
(1) according to the concrete condition of vertical shaft hoist to be detected, sensor location is set, adopts integrated vibration transmitter to detect frequency and the amplitude of spindle vibration;
(2) in described host computer, KingView software and MATLAB software are housed, MATLAB software is used for the data that gather carried out computing and data trend is predicted by finite element algorithm, KingView software is used for showing constantly the variation tendency of the main shaft of hoister vibration of these data representatives, wherein vibration transducer adopts integrated design, and this sensor integrates sensor and transmitter, adopts high-precision integrated circuit, be output as 4-20mA current signal, facilitate terminal to sample.
(3) transmitter will detect vibration signal and convert to the current signal of 4-20MA, by the analog input module of PLC, carry out signals collecting again, by PLC inside programming, carried out conversion and the conversion of signal, converting vibration data to RS485 data delivers in RS485 bus, data in RS485 bus convert by the RS232/RS485 bus converter connecting the level that PC can be identified to, data are delivered to the RS232 interface of host computer through RS232 bus, sent into immediately the KingView software in host computer and deliver in the finite element algorithm model of MATLAB software;
(4) MATLAB sets up finite element algorithm model by finite element algorithm, the numerical value such as the vibration frequency amplitude of the main shaft that its data are detected by vibration transmitters form, by finite element algorithm, in conjunction with KingView software, calculate and can obtain future developing trend early warning more accurately, operation conditions to vertical shaft hoist is predicted, and data is presented on host computer in real time.
The described vertical shaft hoist spindle vibration detection method based on limited element analysis technique, is characterized in that: described KingView software and MATLAB software communicate by OPC technology.
The present invention adopts integrated vibration transmitter to detect the data such as vibration frequency amplitude of main shaft of hoister according to the special construction of vertical shaft hoist, based on remote control technology, and adopt transmitter to transfer vibration signal to 4-20MA simulating signal to send on-the-spot S7-300PLC to, then after processing, PLC adopt RS485 bus through CP343-1LEAN bus converter, to convert the TCP/IP ethernet signal that can identify on PC to, and then send into and be arranged in the host computer of Control Room and receive by the KingView software of host computer the finite element algorithm model that is then transferred to built-in MATLAB software through down-hole looped network, through calculation, obtain future developing trend early warning more accurately, and data are presented on host computer in real time, the safe operation of the PC Real-Time Monitoring hoister by Control Room, to guarantee the safety and stability of coal production.
The present invention is from vertical shaft hoist security, in conjunction with the actual conditions of day-to-day operation, the advantage that makes full use of finite element algorithm is predicted hoister operation conditions, to realize when accident conditions do not occur, warn in time repairing, to guarantee underground work personnel's safety.
Advantage of the present invention is:
Circuit of the present invention is simple, data transmission is reliable, precision of prediction is high, good stability, the life-span is grown and adopt advanced finite element algorithm to predict and realized remote real time monitoring to the safe operation of vertical shaft hoist, a large amount of manpower and materials have been saved, and adopt KingView software as real-time monitoring interface, friendly interface.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention.
Fig. 2 is hoister vibration mechanics model of the present invention.
Fig. 3 is the principal character frequency that the present invention is based on the hoister of finite element algorithm.
Embodiment
As shown in Figure 1, first according to the special construction of vertical shaft hoist, adopt integrated vibration transmitter to detect the data such as vibration frequency amplitude of main shaft of hoister, and adopt transmitter to transfer vibration signal to 4-20MA simulating signal to send on-the-spot S7-300PLC to, then after processing, PLC adopt RS485 bus through CP343-1LEAN bus converter, to convert the TCP/IP ethernet signal that can identify on PC to, and then send into and be arranged in the host computer of Control Room and receive by the KingView software of host computer the finite element algorithm model that is then transferred to built-in MATLAB software through down-hole looped network, through calculation, obtain future developing trend early warning more accurately, and data are presented on host computer in real time, the safe operation of the PC Real-Time Monitoring hoister by Control Room,
1, the theoretical foundation of finite element algorithm
Finite element is the numerical method of the general continuous problem of approximate solution.It is applied to the stress analysis of structure at first, is widely used in soon solving the continuous domain problems such as hot conduction, electromagnetic field, fluid mechanics.
Finite Element Method is married with engineering application, is directly for product design service.Thereby along with the development and perfection of finite element theory, various big and small, special-purpose, general finite-element structure analysis programs also emerge in multitude out.At present, general Engineering Structure Analysis problem, can directly solve with universal program, needn't require efforts and the another calculation procedure of compiling of time.
The fundamental equation of three dimensional elastic dynamics is:
Balance equation σ ij, j+ f i=ρ u i, tt+ μ u i, t(in V territory)
Geometric equation ϵ ij = 1 2 ( u i , j + u j , i ) (in V territory)
Physical equation σ ij=D ijklε kl(in V territory)
Boundary condition u i = u ‾ i (at S uon border)
σ ij = n j = T ‾ i (at S uon border)
u i(x,y,z,0)=u i(x,y,z)
Starting condition
u i,t(x,y,z,0)=u i,t(x,y,z)
In formula, ρ is mass density; μ ratio of damping; u i, ttand u i, trespectively u ito the second derivative of t and first order derivative, represent respectively acceleration and the speed of i direction.ρ u i, ttwith μ u i, trepresent respectively inertial force and damping force (getting negative value).Structure is under the load action of time to time change, and displacement, speed, acceleration, strain, stress are by the function that is all the time.
The general step of solid finite element dynamic analysis can be expressed as follows:
1. the discretize of continuum
In dynamic analysis because introduced time coordinate, processing be four-dimensional (x, y, z, t) problem.In finite element analysis, the general discrete method of part that adopts, only carries out discrete to spatial domain.
2.. structure interpolating function
Discrete owing to only spatial domain being carried out, thus unit intrinsic displacement u, v, the interpolation representation of w is
u ( x , y , z , t ) = Σ i = 1 n N i ( x , y , z ) u i ( t )
v ( x , y , z , t ) = Σ i = 1 n N i ( x , y , z ) v i ( t )
w ( x , y , z , t ) = Σ i = 1 n N i ( x , y , z ) w i ( t )
Or u=Na e
u = u ( x , y , z , t ) v ( x , y , z , t ) w ( x , y , z , t ) , N = N 1 N 2 L N n
Wherein, N i=N ii 3X3(i=1,2, L, n)
a e = a 1 a 2 M a n , a i = u i ( t ) v i ( t ) w i ( t ) , ( i = 1,2 , L , n )
3.. form the solving equation of system
The Galerkin formulation of the equivalent integration forms of the boundary condition of balance equation and power can be expressed as follows:
∫ v δu i ( σ ij , j + f i - ρu i , t ) dV - ∫ s σ δu i ( σ ij n ji - T ‾ i ) dS = 0
To first of above formula carrying out integration by parts, and substitution physical equation, from above formula, can obtain
∫ v ( δϵ ij D ijkl ϵ kl + δu i u i , t + δu i μu i , t ) dV = ∫ v δu i f l dV + ∫ S σ δu i T ‾ i dS
Expression formula after displacement space is discrete and (u 1=u, v 1=v, w 1=w) substitution above formula, and notice displacement of joint variation δ aarbitrariness, just finally obtain the solving equation of system
Ma(t)+Ca(t)+Ka(t)=Q(t)
Wherein a (t) is the node vector acceleration of system, M, and C, K and Q (t) they are respectively mass matrix, damping matrix, stiffness matrix and the node load vectors of system, integrated by cell matrix and vector separately respectively
M e=∑M e,K e=∑K e,C e=∑C e,Q e=∑Q e
M e = ∫ V e ρN T NdV , K e = ∫ V e DBdV , C e = ∫ V e μ N T NdV
Respectively mass matrix, stiffness matrix and the damping matrix of unit.
The foundation of hoister vibration mechanics model:
The foundation of the mechanical model of vertical shaft hoist be based on to the abstract of this type of big machinery system with summarize, its system has integral rigidity and quality non-uniform Distribution, containing features such as a plurality of independent parts.Reasonably mechanical model not only can facilitate theoretical calculating but also can meet the demand of precision in engineering, for the vibrations of effective analysis hoister, played crucial effect
For hoister total abstract being become to a mechanical model, we carry out segmentation whole elevator system, regard as by a plurality of relevant but independently particle formed, by whole elevator system simplify become one without quality, intensively act on the many-degrees of freedom system that has several quality on axle.As shown in Figure 2, the first span is motor portion, and the second span is speed reduction unit part, and the 3rd span is main shaft of hoister part.Due to wheel hub being installed on main shaft, the installation of wheel hub has limited the distortion of main shaft to a certain extent, thereby improved the rigidity of main shaft, so when calculating the rigidity of main shaft, consider the booster action of the installation of wheel hub to main axis stiffness, wheel hub and an integral body of main shaft work are considered, get the diameter of wheel hub as the diameter of main shaft, by parameter, describe the fastening degree of wheel hub to main shaft, and the connecting stiffness parameter of introducing shaft coupling shows the minimizing degree of the rigidity of connection place.
The finite element analysis of vibrating failure diagnosis:
Finite element is the numerical method of the general continuous problem of approximate solution.To as comparatively general in the application of electric field, magnetic field, fluid mechanics etc. with continuous domain problem.The vibration of whole elevator system is abstracted into a linear kinetic model herein, the analytical approach of utilization finite element is aided with computer software to be calculated, thereby reaches the diagnosis of vibration fault and the judgement of source location.
2. the lifting vibration source analysis and diagnosis based on limited element analysis technique
Vibration source factor
General vibration source is mainly from three aspects::
(1) bias of machine rotating part.It is characterized in that vibration frequency is directly proportional to the gyro frequency of eccentric rotary parts.
(2) non-couple carry-over moment.Its feature is that amplitude is directly proportional to load, frequency and non-couple transmitting element identical.
(3) other vibration sources.It is characterized in that vibration frequency is identical with revolution (impact) frequency that produces vibration source equipment
In order to detect excited frequency the vibration signal from rotating machinery, determine exciting reason, generally adopt frequency-domain analysis, utilize the vibration data of finite element analysis Algorithm Analysis calculating sampling, calculate the parameters such as natural frequency, damping, strain, contrast following table, in programming, realize and search comparison, determine the vibration source of vibration, once vibration appearance is abnormal, we can determine failure cause according to vibration source diagnosis, are convenient to the eliminating of fault and the fault analysis and handling in later stage and improvement.
Vibration source analysis and diagnosis
In order to detect excited frequency the vibration signal from rotating machinery, determine exciting reason, general employing frequency-domain analysis, the vibration data of the finite element analysis Algorithm Analysis calculating sampling that utilization is introduced above, calculates the parameters such as natural frequency, damping, strain, comparison diagram 3, in programming, realize and search comparison, determine the vibration source of vibration, once vibration appearance is abnormal, we can determine failure cause according to vibration source diagnosis, are convenient to the eliminating of fault and the fault analysis and handling in later stage and improvement.

Claims (2)

1. the vertical shaft hoist spindle vibration detection method based on limited element analysis technique, it is characterized in that: based on remote control technology, and adopt transmitter to transfer vibration signal to 4-20MA simulating signal to send on-the-spot S7-300PLC to, then after processing, PLC adopt RS485 bus through CP343-1LEAN bus converter, to convert the TCP/IP ethernet signal that can identify on PC to, and then send into and be arranged in the host computer of Control Room and receive by the KingView software of host computer the finite element algorithm model that is then transferred to built-in MATLAB software through down-hole looped network, through calculation, obtain future developing trend early warning more accurately, and data are presented on host computer in real time, comprise the following steps:
(1) according to the concrete condition of vertical shaft hoist to be detected, sensor location is set, adopts integrated vibration transmitter to detect frequency and the amplitude of spindle vibration;
(2) in described host computer, KingView software and MATLAB software are housed, MATLAB software is used for the data that gather carried out computing and data trend is predicted by finite element algorithm, KingView software is used for showing constantly the variation tendency of the main shaft of hoister vibration of these data representatives, wherein vibration transducer adopts integrated design, and this sensor integrates sensor and transmitter, adopts high-precision integrated circuit, be output as 4-20mA current signal, facilitate terminal to sample.
(3) transmitter will detect vibration signal and convert to the current signal of 4-20MA, by the analog input module of PLC, carry out signals collecting again, by PLC inside programming, carried out conversion and the conversion of signal, converting vibration data to RS485 data delivers in RS485 bus, data in RS485 bus convert by the CP343-1LEAN bus converter connecting the TCP/IP ethernet signal that can identify on PC to, and then send into and be arranged in the host computer of Control Room and receive by the KingView software of host computer the finite element algorithm model that is then transferred to built-in MATLAB software through down-hole looped network,
(4) MATLAB sets up finite element algorithm model by finite element algorithm, the numerical value such as the vibration frequency amplitude of the main shaft that its data are detected by vibration transmitters form, by finite element algorithm, in conjunction with KingView software, calculate and can obtain future developing trend early warning more accurately, operation conditions to vertical shaft hoist is predicted, and data is presented on host computer in real time.
2. the vertical shaft hoist spindle vibration detection method based on limited element analysis technique according to claim 1, is characterized in that: described KingView software and MATLAB software communicate by OPC technology.
CN201310656475.1A 2013-11-30 2013-11-30 Vertical shaft hoist main shaft vibration detection method based on finite element analysis method CN103712682A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104915502A (en) * 2015-06-16 2015-09-16 中国海洋石油总公司 Layout method for vibration monitoring device on cylindrical offshore engineering structures
CN107391783A (en) * 2017-06-02 2017-11-24 西安交通大学 A kind of asymmetric Combined Cycle Unit shafting vibration monitoring method based on finite element theory
CN110057580A (en) * 2019-04-17 2019-07-26 中国矿业大学 A kind of main shaft of hoister dynamic response characteristic test device and method
CN110145501A (en) * 2019-04-10 2019-08-20 中国矿业大学 A kind of Double rope winding extra deep shaft lifting system hoisting container posture control method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
解波: ""基于有限元分析法的立井提升机主轴振动监测系统"", 《数字技术与应用》, no. 5, 31 May 2013 (2013-05-31), pages 103 - 104 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104915502A (en) * 2015-06-16 2015-09-16 中国海洋石油总公司 Layout method for vibration monitoring device on cylindrical offshore engineering structures
CN104915502B (en) * 2015-06-16 2017-10-20 中国海洋石油总公司 A kind of method for arranging of vibration monitoring device on cylindric ocean engineering structure
CN107391783A (en) * 2017-06-02 2017-11-24 西安交通大学 A kind of asymmetric Combined Cycle Unit shafting vibration monitoring method based on finite element theory
CN107391783B (en) * 2017-06-02 2020-04-28 西安交通大学 Finite element theory-based asymmetric combined cycle unit shafting vibration monitoring method
CN110145501A (en) * 2019-04-10 2019-08-20 中国矿业大学 A kind of Double rope winding extra deep shaft lifting system hoisting container posture control method
CN110057580A (en) * 2019-04-17 2019-07-26 中国矿业大学 A kind of main shaft of hoister dynamic response characteristic test device and method
CN110057580B (en) * 2019-04-17 2020-09-01 中国矿业大学 Device and method for testing dynamic response characteristics of main shaft of elevator

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