CN113408067B - Method for acquiring stroke curve of circuit breaker operating mechanism - Google Patents

Method for acquiring stroke curve of circuit breaker operating mechanism Download PDF

Info

Publication number
CN113408067B
CN113408067B CN202110670346.2A CN202110670346A CN113408067B CN 113408067 B CN113408067 B CN 113408067B CN 202110670346 A CN202110670346 A CN 202110670346A CN 113408067 B CN113408067 B CN 113408067B
Authority
CN
China
Prior art keywords
pair
placing
setting
operating mechanism
point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110670346.2A
Other languages
Chinese (zh)
Other versions
CN113408067A (en
Inventor
吴鹤翔
张笑瑞
王玘
林圣�
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tonghao Changsha Rail Traffic Control Technology Co ltd
Southwest Jiaotong University
Original Assignee
Tonghao Changsha Rail Traffic Control Technology Co ltd
Southwest Jiaotong University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tonghao Changsha Rail Traffic Control Technology Co ltd, Southwest Jiaotong University filed Critical Tonghao Changsha Rail Traffic Control Technology Co ltd
Priority to CN202110670346.2A priority Critical patent/CN113408067B/en
Publication of CN113408067A publication Critical patent/CN113408067A/en
Application granted granted Critical
Publication of CN113408067B publication Critical patent/CN113408067B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Evolutionary Computation (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Computer Graphics (AREA)
  • Software Systems (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The invention discloses a method for acquiring a stroke curve of a circuit breaker operating mechanism, which comprises the following steps: building an assembly model of the circuit breaker operating mechanism; introducing the assembly body model into ADAMS to obtain a multi-body dynamic model, and setting parameters of parts in the multi-body dynamic model and constraint relations among the parts in the ADAMS; setting the magnitudes of the spring and the friction acting force in the multi-body dynamic model, and performing simulation; and setting an observation point, and acquiring a stroke curve and a speed curve of the multi-body dynamic model of the operating mechanism. The system can solve a series of problems of difficulty in setting friction coefficients between mechanisms, limited experimental sites, difficulty in acquiring equipment, difficulty in installing sensors and the like, and can simply and accurately acquire a stroke curve.

Description

Circuit breaker operating mechanism stroke curve obtaining method
Technical Field
The invention relates to the technical field of breaker fault diagnosis, in particular to a method for acquiring a stroke curve of a breaker operating mechanism.
Background
The circuit breaker is important switchgear in a power supply system, and can timely isolate a fault line besides opening and closing the line, so that the accident range is prevented from being further expanded, and the reliable operation of the system is guaranteed. If the breaker has the faults of not-in-place opening and closing or misoperation, refusal action and the like, the line is temporarily powered off if the breaker is in a light state, the stability of the system is endangered if the breaker is in a heavy state, more serious power failure accidents are induced, and huge economic loss is generated. Therefore, in consideration of the important role of the circuit breaker in the power supply system, it is necessary to perform fault diagnosis on the circuit breaker.
According to data statistics, the percentage of mechanical faults in all faults of the circuit breaker is the highest and can reach 70%. According to the field report, the faults of jamming of the operating mechanism, loosening of the spring, loosening of the fastening screw and breakage of the mechanism are the most common in all mechanical faults. It is therefore necessary to investigate these faults and extract the characteristics of them. The travel curve of the circuit breaker operating mechanism contains abundant information from which the characteristic quantities required for diagnosing the above-mentioned several faults can be obtained. However, it is difficult to obtain the stroke curve of the circuit breaker operating mechanism, on one hand, the real object of the circuit breaker is difficult to obtain, and on the other hand, the problems of difficult matching, difficult installation and the like exist because the displacement sensor for collecting the stroke curve is influenced by the model of the circuit breaker and the structure of the operating mechanism.
Disclosure of Invention
The invention provides a method for acquiring a stroke curve of a circuit breaker operating mechanism, which aims to solve the problem that the prior art is difficult to acquire the stroke curve of the circuit breaker operating mechanism.
A method for acquiring a stroke curve of a circuit breaker operating mechanism comprises the following steps:
step A: building an assembly model of the circuit breaker operating mechanism;
and B: introducing the assembly body model into ADAMS to obtain a multi-body dynamic model, and setting parameters of parts in the multi-body dynamic model and constraint relations among the parts in the ADAMS;
step C: setting the sizes of springs and friction acting force in the multi-body dynamic model, and performing simulation;
step D: and setting an observation point, and acquiring a stroke curve and a speed curve of the multi-body dynamic model of the operating mechanism.
Further, the step a specifically includes:
a1: determining the thickness, the length, the radius, the angle and the width of each part according to a design drawing of a circuit breaker operating mechanism;
a2: constructing a three-dimensional model of each part based on the data acquired in the step A1;
a3: and assembling the three-dimensional models of the parts together according to the positions of the parts in the design drawing of the circuit breaker operating mechanism to form an assembly body model.
Further, the step B includes:
b1: the density of all parts in the multi-body dynamic model was set to 7.85 × 10 -6 kg·mm -3 ；
B2: arranging kinematic pairs on the multi-body dynamic model parts;
b3: and setting collision, spring and friction acting force in the multi-body dynamic model.
Further, the step B2 specifically includes:
setting a rotary pair R1, respectively selecting a geometric central point and an interface blank of the operating shaft, and placing the rotary pair at the geometric central point of the operating shaft;
setting a rotating pair R2, respectively selecting a geometric central point and an interface blank of the energy storage shaft, and placing the rotating pair at the geometric central point of the energy storage shaft;
setting a rotating pair R3, respectively selecting a rotating central point and an interface blank of the closing holding pawl, and placing the rotating pair at the rotating central point of the closing holding pawl;
arranging a rotary pair R4, respectively selecting the geometric central points of the operating shaft and the output crank arm, and placing the rotary pair at the geometric central point of the operating shaft;
arranging a rotary pair R5, respectively selecting the geometric center points of the operating shaft and the large crank arm, and placing the rotary pair at the geometric center point of the operating shaft;
arranging a rotating pair R6, respectively selecting the geometric central points of the energy storage shaft and the cam, and placing the rotating pair at the geometric central point of the energy storage shaft;
arranging a rotating pair R7, respectively selecting the geometric central points of the operating shaft and the ratchet wheel, and placing the rotating pair at the geometric central point of the ratchet wheel;
arranging a rotating pair R8, respectively selecting geometric central points of a closing transmission rod and a ratchet wheel, and placing the rotating pair at the central point of an arc-shaped part of the closing transmission rod;
arranging a rotary pair R9, respectively selecting the geometric central points of the opening transmission rod and the output crank arm, and placing the rotary pair at the central point on the right side of the output crank arm;
arranging a rotating pair R10, respectively selecting the geometric center points of the large crank arm and the roller, and placing the rotating pair at the geometric center point of the roller;
arranging a rotary pair R11, respectively selecting the geometric central points of the output crank arm and the transmission rod, and placing the rotary pair at the central point on the left side of the output crank arm;
arranging a rotating pair R12, respectively selecting the geometric central points of the transmission rod and the crank arm, and placing the rotating pair at the central point of the upper part of the transmission rod;
arranging a rotating pair R13, respectively selecting the geometric center points of the crank arm and the linkage plate, and placing the rotating pair at the geometric center point of the linkage plate;
setting a moving pair T1, respectively selecting a placing point of a closing spring at the tail end of a closing transmission rod and a blank position of an interface, placing the moving pair on the placing point of the closing spring, and simultaneously setting the direction of the moving pair to be the same as the direction of gravity in an ADAMS interface;
setting a moving pair T2, respectively selecting a brake separating spring placing point and an interface blank at the tail end of a brake separating transmission rod, placing the moving pair on the brake separating spring placing point, and simultaneously setting the direction of the moving pair to be the same as the direction of gravity in an ADAMS interface;
arranging a fixed pair F1, respectively selecting the geometric center points of the ratchet wheel and the energy storage shaft, and placing the fixed pair at the geometric center of the energy storage shaft;
arranging a fixed pair F2, respectively selecting the geometric central points of the energy storage shaft and the cam, and placing the fixed pair at the geometric central point of the energy storage shaft;
setting a fixed pair F3, respectively selecting the geometric center points of the large crank arm and the operating shaft, and placing the fixed pair at the geometric center point of the operating shaft;
and arranging a fixed pair F4, respectively selecting the geometric center points of the output crank arm and the operating shaft, and placing the fixed pair at the geometric center point of the operating shaft.
Further, the step B3 includes:
selecting a collision module Contact1 in the ADAMS software acting force column, and then respectively selecting the outer surfaces of a large crank arm and a closing holding pawl to complete the setting of collision acting force;
selecting a collision module Contact2 in the column of the acting force of the ADAMS software, and then respectively selecting the outer surfaces of the cam and the roller to complete the setting of the collision acting force;
selecting a Spring module Spring1 in the ADAMS software acting force column, and then respectively selecting a placing point of a closing Spring and an interface blank right above the placing point to construct a closing Spring;
and selecting a Spring module Spring2 in the column of the acting force of the ADAMS software, and then respectively selecting a placing point of the opening Spring and a blank position of an interface right above the placing point to construct the opening Spring.
Further, the step C specifically includes:
c1: obtaining the line diameter d of a closing spring and an opening spring in a real object of a circuit breaker operating mechanism 1 、d 2 Outer diameter D 1 、D 2 Total number of turns N of spring 1 、N 2 (ii) a Height l of closing spring in free state, height h of stored energy state, and height l of opening spring in free state 0 Height x in the pre-compressed state;
c2: calculating the stiffness coefficient k of the closing spring and the opening spring by using the data obtained in the step C1 1 、k 2 And pressure F applied to the closing spring and the opening spring 1 、F 2 ：
Figure BDA0003118466580000041
N c1 ＝N 1 -2；D m1 ＝D 1 -d 1 ；G＝210GPa
Figure BDA0003118466580000042
N c2 ＝N 2 -2；D m2 ＝D 2 -d 2 ；G＝210GPa
F 1 ＝k 1 ·(l-h)
F 2 ＝k 2 ·(l 0 -x)
C3: the rotating pairs R1 and R2 in the multi-body dynamic model are used for equivalent rolling bearings arranged on an operating shaft and an energy storage shaft in actual equipment of an operating mechanism; setting the dynamic friction coefficients of all the rotating pairs except the rotating pairs R1 and R2 in the multi-body dynamic model to be 0.1, and setting the static friction coefficients to be 0.12;
c4: setting the dynamic friction coefficients of the rotating pairs R1 and R2 to be 0.0035 and the static friction coefficient to be 0.0040;
c5: setting parameters of a Simulation Control module in ADAMS as follows: the simulation end time is 0.1s, and the simulation steps are 100.
Further, the step D specifically includes:
d1: selecting a Marker point in a Construction column in ADAMS software, and fixing the Marker point at the tail end of the crank arm;
d2: after fixing the Marker point, selecting the Measure option of the point, selecting the relational displacement in the Characteriostic column, and then clicking 'Y' in the Component column; and named displacement;
d3: selecting the Measure option of the Marker point again, selecting the relational coordinate in the Characteriostic column, and then clicking 'Y' in the Component column; and is named as velocity;
d4: carrying out simulation calculation on a multi-body dynamic model of the operating mechanism to obtain a stroke and speed curve of the operating mechanism;
d5: and after the calculation is finished, selecting a Postprocessor module in a Result column in the ADAMS, and respectively selecting displacement and velocity in a Measure column of the module to obtain a stroke curve and a speed curve of the operating mechanism.
Further, still include:
step E: verifying the stroke curve of the operating mechanism, and if the deviation of the stroke curve and the actually measured value is less than a preset value, conforming to the requirement; otherwise, modifying the dynamic friction coefficients of the revolute pairs R1 and R2 in the multi-body dynamic model, and re-acquiring the stroke curve until the stroke curve meets the requirements; and the rotating pairs R1 and R2 in the multi-body dynamic model are used for rolling bearings arranged on an operating shaft and an energy storage shaft in actual equipment of an equivalent operating mechanism.
Further, the step E specifically includes:
e1: extracting the peak value X of the travel curve p And its corresponding time t p Moving contact motion time t and peak value v of speed curve p And the corresponding time v t ；
E2: acquiring actual measurement numerical values of the five physical quantities in the step E1;
e3: comparing the five physical quantity values extracted in the step E1 with the actual measurement results of the corresponding five physical quantities in the step E2, and calculating the deviation of each of the five physical quantities:
Figure BDA0003118466580000051
e4: if the absolute values of the deviation of the five physical quantities in the step E3 are all within 20%, the stroke curve of the operating mechanism meets the requirement; otherwise, modifying the dynamic friction coefficients of the rotating pairs R1 and R2 in the multi-body dynamic model, and re-acquiring the stroke curve until the deviation of the five physical quantities in the step E3 is less than 20%.
Advantageous effects
The invention provides a method for acquiring a stroke curve of a circuit breaker operating mechanism, which has the following advantages:
1. according to the invention, a method for setting important mechanism parameters in the model is provided according to the sizes of the opening spring and the closing spring in the equipment, the lengths of the opening spring and the closing spring in different states, the material quality of parts in the mechanism and other information, so that the model is closer to a real object, is more reasonably built, and is convenient for accurately obtaining a stroke curve meeting requirements;
2. the invention can solve a series of problems of difficult setting of friction coefficient between mechanisms, limited experimental site, difficult acquisition of equipment, difficult installation of sensors and the like, and simply and accurately acquire a stroke curve;
3. the multi-body dynamic model obtained based on the method can provide a basis for researches such as diagnosis of mechanical faults of the circuit breaker, mechanism optimization and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an assembly model structure of a spring operating mechanism according to an embodiment of the present invention;
fig. 2 is a schematic position diagram of the end points of the crank arm, the large crank arm, the output crank arm, the transmission rod, the opening transmission rod and the closing transmission rod provided by the embodiment of the invention;
fig. 3 is a flowchart of a method for acquiring a stroke curve of a circuit breaker operating mechanism according to an embodiment of the present invention;
fig. 4 is a travel curve and a speed variation curve provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
As shown in fig. 1 to 4, the present invention provides a method for obtaining a stroke curve of a circuit breaker operating mechanism, including:
step A: and building an assembling body model of the circuit breaker operating mechanism in Solidworks software. The method specifically comprises the following steps:
a1: and determining the thickness, the length, the radius, the angle and the width of each part according to a design drawing of the circuit breaker operating mechanism.
A2: utilizing Solidworks software to construct a three-dimensional model of each part, and then sequentially storing all constructed three-dimensional models in an SLDPRT format, wherein the method specifically comprises the following steps:
building a three-dimensional model of the cam 10 by utilizing Solidworks software according to the thickness of the cam 10 in the spring operating mechanism of the circuit breaker and the radius of the cam at different angles;
building a three-dimensional model of the linkage plate 1 by utilizing Solidworks software according to the length of the linkage plate 1 and the radius of a cylinder in the spring operating mechanism of the circuit breaker;
building a three-dimensional model of the output connecting lever 4 by utilizing Solidworks software according to the thickness, the radius and the radian of the arc-shaped part of the output connecting lever 4 in the spring operating mechanism of the circuit breaker;
building a three-dimensional model of the large crank arm 7 by utilizing Solidworks software according to the length, the width and the thickness of the large crank arm 7 in the spring operating mechanism of the circuit breaker and the radius and the angle of the arc part;
building a three-dimensional model of the roller 9 by utilizing Solidworks software according to the radius and the thickness of the roller 9 in the spring operating mechanism of the circuit breaker;
building a three-dimensional model of the closing holding pawl 8 by utilizing Solidworks software according to the length, the width and the thickness of the closing holding pawl 8 and the radius and the angle of an arc-shaped part in a spring operating mechanism of the circuit breaker;
building a three-dimensional model of the closing transmission rod 13 by utilizing Solidworks software according to the length and the thickness of the closing transmission rod 13 in the spring operating mechanism of the circuit breaker and the radius and the angle of the arc-shaped part;
building a three-dimensional model of the switching-on transmission rod 5 by utilizing Solidworks software according to the total length, the cylinder length and the cylinder radius of the switching-off transmission rod 5 in the spring operating mechanism of the circuit breaker;
building a three-dimensional model of the transmission rod 3 by utilizing Solidworks software according to the total length, the cylinder length and the cylinder radius of the transmission rod 3 in the spring operating mechanism of the circuit breaker;
building a three-dimensional model of the ratchet wheel 12 by utilizing Solidworks software according to the radius and the thickness of the ratchet wheel 12 in the spring operating mechanism of the circuit breaker and the number of pawls on the ratchet wheel;
according to the total length and thickness of the crank arm 2 in the spring operating mechanism of the circuit breaker and the radius and angle of the arc-shaped part, building a three-dimensional model of the crank arm 2 by utilizing Solidworks software;
building a three-dimensional model of the operating shaft 6 by utilizing Solidworks software according to the length and the radius of the operating shaft 6 in the spring operating mechanism of the circuit breaker;
building a three-dimensional model of the energy storage shaft 11 by utilizing Solidworks software according to the length and the radius of the energy storage shaft 11 in the spring operating mechanism of the circuit breaker;
and sequentially storing all the built three-dimensional models in an SLDPRT format.
A3: and assembling the three-dimensional models of the parts led into the Solidworks assembly interface together according to the positions of the parts in the design drawing of the circuit breaker operating mechanism to form an assembly body model. The method specifically comprises the following steps:
all the three-dimensional models of the parts stored in the A2 in the SLDPRT format are led into an assembly interface of Solidworks;
fixing an operating shaft on the assembly interface, and setting the front view of the assembly interface as a reference plane, the central axis of the operating shaft as a reference line and the geometric center point of the operating shaft as a reference point;
setting the central axis of the energy storage shaft 11 to be parallel to the reference line, and then fixing the energy storage shaft 11 in an assembly interface according to the distance between the central axis of the energy storage shaft 11 and the reference line, the height from the geometric central point of the energy storage shaft 11 to the vertical direction of the reference plane and the linear distance from the geometric central point of the energy storage shaft 11 to the reference point;
the method comprises the following steps that a coaxial constraint module in Solidworks is used, a cam 10 and an energy storage shaft 11, a ratchet 12 and the energy storage shaft 11 are respectively selected, and the cam 10 and the ratchet 12 are respectively placed on the energy storage shaft 11; then modifying the positions of the cam 10 and the ratchet wheel 12 on the energy storage shaft 11 according to the linear distance from the geometric center point of the cam 10 and the ratchet wheel 12 to the reference point;
using a coaxial constraint module in Solidworks, respectively placing an output crank arm 4 and a large crank arm 7 on an operating shaft 6, and modifying the positions of parts on the operating shaft 6 according to the distance between the geometric center point of each of the two parts and the geometric center point of the operating shaft 6;
connecting the upper end of an opening transmission rod 5 with the right end 19 of an output crank arm, connecting the lower end point 17 of the transmission rod with the left end 18 of the output crank arm, connecting the central point 22 of an arc part of a closing transmission rod with a ratchet wheel 12, connecting the upper end point 16 of the transmission rod with a crank arm 2, connecting the right end point of the crank arm 2 with the geometric central point 14 of a linkage plate, and connecting the geometric central point of a roller 9 with the lower end point 21 of a large crank arm by using a coaxial constraint module in Solidworks; the end point positions of the parts in the model are shown in FIG. 2;
using a contact constraint module in Solidworks, selecting a closing holding pawl 8 and a roller 9, and simultaneously adjusting the position of the closing holding pawl 8 according to the distance from a rotation center 24 of the closing holding pawl to a geometric center point of an operating shaft 6 and the height of a reference surface; the assembled model is shown in fig. 1. After the assembly model is completed, the assembly model is saved in the x _ t format.
And B: importing the assembly body model into ADAMS software to generate a multi-body dynamic model of the operating mechanism; parameters of each part in the multi-body dynamic model and constraint relations among the parts are set in the ADAMS. The method specifically comprises the following steps:
b1: the materials of the parts in the operating mechanism comprise 45-grade steel, Q235A, 20CrMnTi and 60Si2CrVA, and in the embodiment, the density of all the parts in the multi-body dynamic model is uniformly set to be 7.85 multiplied by 10 -6 kg·mm -3 。
B2: arranging kinematic pairs on the multi-body dynamic model parts; the method specifically comprises the following steps:
setting a rotary pair R1, respectively selecting a geometric central point and an interface blank of the operating shaft 6, and placing the rotary pair at the geometric central point of the operating shaft 6;
setting a rotary pair R2, respectively selecting a geometric central point and an interface blank of the energy storage shaft 11, and placing the rotary pair at the geometric central point of the energy storage shaft 11;
setting a rotating pair R3, respectively selecting a rotating central point 24 of a closing holding pawl and an interface blank, and placing the rotating pair at the rotating central point 24 of the closing holding pawl;
arranging a rotary pair R4, respectively selecting the geometric center points of the operating shaft 6 and the output crank arm 4, and placing the rotary pair at the geometric center point of the operating shaft 6;
arranging a rotary pair R5, respectively selecting the geometric center points of the operating shaft 6 and the large crank arm 7, and placing the rotary pair at the geometric center point 6 of the operating shaft;
arranging a rotating pair R6, respectively selecting the geometric center points of the energy storage shaft 11 and the cam 10, and placing the rotating pair at the geometric center point of the energy storage shaft 11;
arranging a rotating pair R7, respectively selecting the geometric center points of the operating shaft 6 and the ratchet wheel 12, and placing the rotating pair at the geometric center point of the ratchet wheel 12;
arranging a rotary pair R8, respectively selecting geometric central points of a closing transmission rod 13 and a ratchet wheel 12, and placing the rotary pair at the central point 22 of an arc-shaped part of the closing transmission rod; the position of the central point 22 of the arc-shaped part of the closing transmission rod in the model is shown in fig. 2;
arranging a rotating pair R9, respectively selecting the geometric central points of the opening transmission rod 5 and the output crank arm 4, and placing the rotating pair at the central point 19 on the right side of the output crank arm; the position of the center point 19 on the right side of the output crank arm in the model is shown in fig. 2;
arranging a rotating pair R10, respectively selecting the geometric center points of the large crank arm 7 and the roller 9, and placing the rotating pair at the geometric center point of the roller 9;
arranging a rotary pair R11, respectively selecting the geometric central points of the output crank arm 4 and the transmission rod 3, and placing the rotary pair at the central point 18 on the left side of the output crank arm; the position of the center point 18 on the left side of the output crank arm in the model is shown in fig. 2;
arranging a rotating pair R12, respectively selecting the geometric central points of the transmission rod 3 and the crank arm 2, and placing the rotating pair at the central point 16 of the upper part of the transmission rod; the position of the centre point 16 of the upper part of the driving rod in the mould is shown in figure 2;
arranging a rotating pair R13, respectively selecting the geometric center points of the crank arm 2 and the linkage plate 1, and placing the rotating pair at the geometric center point 14 of the linkage plate;
setting a moving pair T1, respectively selecting a closing spring placing point 23 and an interface blank at the tail end of a closing transmission rod 13, placing the moving pair on the closing spring placing point 23, and simultaneously setting the direction of the moving pair to be the same as the direction of gravity in an ADAMS interface; the position of the closing spring placing point 23 in the model is shown in fig. 2;
setting a moving pair T2, respectively selecting a brake separating spring placing point 20 and an interface blank at the tail end of a brake separating transmission rod 5, placing the moving pair on the brake separating spring placing point 20, and simultaneously setting the direction of the moving pair to be the same as the direction of gravity in an ADAMS interface; the position of the opening spring placing point 20 in the model is shown in FIG. 2;
arranging a fixed pair F1, respectively selecting the geometric center points of the ratchet wheel 12 and the energy storage shaft 11, and placing the fixed pair at the geometric center of the energy storage shaft 11;
arranging a fixed pair F2, respectively selecting the geometric central points of the energy storage shaft 11 and the cam 10, and placing the fixed pair at the geometric central point of the energy storage shaft 11;
arranging a fixed pair F3, respectively selecting the geometric center points of a large crank arm 7 and an operating shaft 6, and placing the fixed pair at the geometric center point of the operating shaft 6;
and arranging a fixed pair F4, respectively selecting the geometric center points of the output crank arm 4 and the operating shaft 6, and placing the fixed pair at the geometric center point of the operating shaft 6.
B3: setting collision, spring and friction acting force in the multi-body dynamic model; the method specifically comprises the following steps:
selecting a collision module Contact1 in the ADAMS software acting force column, and then respectively selecting the outer surfaces of a large crank arm 7 and a closing holding pawl 8 to finish the setting of collision acting force;
selecting a collision module Contact2 in the ADAMS software acting force column, and then respectively selecting the outer surfaces of the cam 10 and the roller 9 to complete the setting of collision acting force;
selecting a Spring module Spring1 in the ADAMS software acting force column, and then respectively selecting a placing point 23 of a closing Spring and a blank position of an interface right above the placing point to construct the closing Spring;
and selecting a Spring module Spring2 in the column of the acting force of the ADAMS software, and then respectively selecting a brake-separating Spring placing point 20 and a blank of an interface right above the placing point to construct a brake-separating Spring.
And C: and setting the magnitude of each acting force in the multi-body dynamic model. The method specifically comprises the following steps:
c1: obtaining the line diameter d of a switching-on spring and a switching-off spring in a real object 1 、d 2 Outer diameter D 1 、D 2 Total number of turns of spring N 1 、N 2 (ii) a Height l of closing spring in free state, height h of closing spring in stored energy state, and height l of opening spring in free state 0 Height x in the pre-compressed state;
c2: calculating the stiffness coefficient k of the closing and opening springs by using the data in the C1 1 、k 2 And the pressure F exerted on both 1 、F 2 ：
Figure BDA0003118466580000091
N c1 ＝N 1 -2；D m1 ＝D 1 -d 1 ；G＝210GPa
Figure BDA0003118466580000092
N c2 ＝N 2 -2；D m2 ＝D 2 -d 2 ；G＝210GPa
F 1 ＝k 1 ·(l-h)
F 2 ＝k 2 ·(l 0 -x)
C3: the dynamic friction coefficient of the lubricated iron alloy is 0.1, the static friction coefficient is 0.12, the dynamic friction coefficients of all rotating pairs except the rotating pairs R1 and R2 in the model are set to be 0.1, and the static friction coefficient is set to be 0.12;
c4: the rotating pairs R1 and R2 are used for equivalent rolling bearings arranged on an operating shaft and an energy storage shaft in actual equipment of an operating mechanism, the dynamic friction coefficients of the rotating pairs R1 and R2 are both set to be 0.0035, and the static friction coefficients are set to be 0.0040;
c5: the parameters of the Simulation Control module in the ADAMS are set as follows: the simulation end time is 0.1s, and the simulation steps are 100 steps.
Step D: and setting an observation point, and acquiring a stroke curve and a speed curve of the multi-body dynamic model of the operating mechanism. The method specifically comprises the following steps:
d1: selecting a Marker point in a Construction column in ADAMS software, and fixing the Marker point at the tail end 15 of the crank arm; the specific location of the crank arm end 15 is shown in fig. 2;
d2: after fixing the Marker point, selecting the Measure option of the point, selecting the relational displacement in the Characteriostic column, and then clicking 'Y' in the Component column; and named as displacement (actuator stroke);
d4: selecting again the Measure option of Marker point and selecting transformational gradient in Characteristic column, then clicking "Y" in Component column; and is named as velocity (operating mechanism movement speed)
D5: carrying out simulation calculation on a multi-body dynamic model of the operating mechanism to obtain a stroke and speed curve of the operating mechanism;
d6: and after the calculation is finished, selecting a Postprocessor module in a Result column in the ADAMS, and respectively selecting displacement and velocity in a Measure column of the module to obtain a stroke curve and a speed curve of the operating mechanism.
Step E: and verifying the stroke curve of the operating mechanism. The method specifically comprises the following steps:
e1: extracting the peak value X of the travel curve in the calculation result p And its corresponding time t p Moving contact motion time t and peak value v of speed curve p And corresponding time v t ；
E2: acquiring actual measurement numerical values of the five physical quantities in the step E1;
e3: comparing the five physical quantity values extracted in the step E1 with the corresponding actual measurement results in the step E2, and calculating the respective deviation of the five physical quantities:
Figure BDA0003118466580000101
e4: if the absolute values of the deviation of the five physical quantities in the step E3 can be controlled within 20%, the stroke curve of the operating mechanism is in accordance with the reality and can be used for fault diagnosis research of the circuit breaker; otherwise, returning to the step C4 to modify the dynamic friction coefficients of the rotating pairs R1 and R2 until the calculation result meets the requirement that the deviation is less than 20%.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (8)

1. A method for acquiring a stroke curve of a circuit breaker operating mechanism is characterized by comprising the following steps:
step A: building an assembly model of the circuit breaker operating mechanism;
and B: introducing the assembly body model into ADAMS to obtain a multi-body dynamic model, and setting parameters of parts in the multi-body dynamic model and constraint relations among the parts in the ADAMS;
and C: setting the sizes of springs and friction acting force in the multi-body dynamic model, and performing simulation; setting the dynamic friction coefficients of all the rotating pairs except the rotating pairs R1 and R2 in the multi-body dynamic model to be 0.1, and setting the static friction coefficients to be 0.12; setting the dynamic friction coefficients of the rotating pair R1 and the rotating pair R2 to be 0.0035, and setting the static friction coefficient to be 0.0040; the rotating pairs R1 and R2 in the multi-body dynamic model are used for equivalent rolling bearings arranged on an operating shaft and an energy storage shaft in actual equipment of an operating mechanism;
step D: setting an observation point, and acquiring a stroke curve and a speed curve of the multi-body dynamic model of the operating mechanism;
step E: verifying the stroke curve of the operating mechanism, and if the deviation of the stroke curve and the actually measured value is less than a preset value, conforming to the requirement; otherwise, modifying the dynamic friction coefficients of the rotating pairs R1 and R2 in the multi-body dynamic model, and re-acquiring the stroke curve until the stroke curve meets the requirements.
2. The method for acquiring the stroke curve of the circuit breaker operating mechanism according to claim 1, wherein the step a specifically comprises:
a1: determining the thickness, the length, the radius, the angle and the width of each part according to a design drawing of a circuit breaker operating mechanism;
a2: constructing a three-dimensional model of each part based on the data acquired in the step A1;
a3: and assembling the three-dimensional models of the parts together according to the positions of the parts in the design drawing of the circuit breaker operating mechanism to form an assembly body model.
3. The method for acquiring the stroke curve of the circuit breaker operating mechanism according to claim 1, wherein the step B comprises the following steps:
b1: the density of all parts in the multi-body dynamic model is set to be 7.85 multiplied by 10 -6 kg·mm -3 ；
B2: arranging kinematic pairs on the multi-body dynamic model parts;
b3: and setting collision, spring and friction acting force in the multi-body dynamic model.
4. The method for acquiring the stroke curve of the circuit breaker operating mechanism according to claim 3, wherein the step B2 specifically comprises:
setting a rotary pair R1, respectively selecting a geometric central point and an interface blank of the operating shaft, and placing the rotary pair at the geometric central point of the operating shaft;
setting a rotating pair R2, respectively selecting a geometric central point of the energy storage shaft and an interface blank, and placing the rotating pair at the geometric central point of the energy storage shaft;
setting a rotating pair R3, respectively selecting a rotating central point of the closing keeping pawl and an interface blank, and placing the rotating pair at the rotating central point of the closing keeping pawl;
setting a rotating pair R4, respectively selecting the geometric central points of the operating shaft and the output crank arm, and placing the rotating pair at the geometric central point of the operating shaft;
arranging a rotary pair R5, respectively selecting the geometric center points of the operating shaft and the large crank arm, and placing the rotary pair at the geometric center point of the operating shaft;
arranging a rotating pair R6, respectively selecting the geometric central points of the energy storage shaft and the cam, and placing the rotating pair at the geometric central point of the energy storage shaft;
arranging a rotating pair R7, respectively selecting the geometric central points of the operating shaft and the ratchet wheel, and placing the rotating pair at the geometric central point of the ratchet wheel;
arranging a rotary pair R8, respectively selecting geometric central points of a closing transmission rod and a ratchet wheel, and placing the rotary pair at the central point of an arc-shaped part of the closing transmission rod;
setting a rotating pair R9, respectively selecting the geometric central points of the opening transmission rod and the output crank arm, and placing the rotating pair at the central point of the right side of the output crank arm;
arranging a rotating pair R10, respectively selecting the geometric center points of the large crank arm and the roller, and placing the rotating pair at the geometric center point of the roller;
setting a rotating pair R11, respectively selecting the geometric central points of the output crank arm and the transmission rod, and placing the rotating pair at the central point of the left side of the output crank arm;
arranging a rotating pair R12, respectively selecting geometric central points of the transmission rod and the crank arm, and placing the rotating pair at the central point of the upper part of the transmission rod;
arranging a rotating pair R13, respectively selecting the geometric center points of the crank arm and the linkage plate, and placing the rotating pair at the geometric center point of the linkage plate;
setting a moving pair T1, respectively selecting a placing point of a closing spring at the tail end of a closing transmission rod and a blank position of an interface, placing the moving pair on the placing point of the closing spring, and simultaneously setting the direction of the moving pair to be the same as the direction of gravity in an ADAMS interface;
setting a moving pair T2, respectively selecting a brake separating spring placing point and an interface blank at the tail end of a brake separating transmission rod, placing the moving pair on the brake separating spring placing point, and simultaneously setting the direction of the moving pair to be the same as the direction of gravity in an ADAMS interface;
arranging a fixed pair F1, respectively selecting the geometric center points of the ratchet wheel and the energy storage shaft, and placing the fixed pair at the geometric center of the energy storage shaft;
arranging a fixed pair F2, respectively selecting the geometric central points of the energy storage shaft and the cam, and placing the fixed pair at the geometric central point of the energy storage shaft;
setting a fixed pair F3, respectively selecting the geometric center points of the large crank arm and the operating shaft, and placing the fixed pair at the geometric center point of the operating shaft;
and arranging a fixed pair F4, respectively selecting the geometric central points of the output crank arm and the operating shaft, and placing the fixed pair at the geometric central point of the operating shaft.
5. The method for acquiring the stroke curve of the circuit breaker operating mechanism according to claim 3, wherein the step B3 comprises:
selecting a collision module Contact1 in the ADAMS software acting force column, and then respectively selecting the outer surfaces of a large crank arm and a closing holding pawl to complete the setting of collision acting force;
selecting a collision module Contact2 in the ADAMS software acting force column, and then respectively selecting the outer surfaces of the cam and the roller to complete the setting of collision acting force;
selecting a Spring module Spring1 in the ADAMS software acting force column, and then respectively selecting a placing point of a closing Spring and an interface blank right above the placing point to construct a closing Spring;
and selecting a Spring module Spring2 in the column of the acting force of the ADAMS software, and then respectively selecting a placing point of the opening Spring and a blank of an interface right above the placing point to construct the opening Spring.
6. The method for acquiring the stroke curve of the circuit breaker operating mechanism according to claim 1, wherein the step C specifically comprises:
c1: obtaining the line diameter d of a closing spring and an opening spring in a real object of a circuit breaker operating mechanism 1 、d 2 Outer diameter D 1 、D 2 Total number of turns N of spring 1 、N 2 (ii) a Height l of closing spring in free state, height h of stored energy state, and height l of opening spring in free state 0 Height x in the pre-compressed state;
c2: calculating the stiffness coefficients k of the closing spring and the opening spring by using the data obtained in the step C1 1 、k 2 And pressure F applied to the closing spring and the opening spring 1 、F 2 ：
Figure FDA0003944314380000031
N c1 ＝N 1 -2；D m1 ＝D 1 -d 1 ；G＝210GPa
Figure FDA0003944314380000032
N c2 ＝N 2 -2；D m2 ＝D 2 -d 2 ；G＝210GPa
F 1 ＝k 1 ·(l-h)
F 2 ＝k 2 ·(l 0 -x)
C3: the rotating pairs R1 and R2 in the multi-body dynamic model are used for equivalent rolling bearings arranged on an operating shaft and an energy storage shaft in actual equipment of an operating mechanism; setting the dynamic friction coefficient of all rotating pairs except the rotating pairs R1 and R2 in the multi-body dynamic model to be 0.1, and setting the static friction coefficient to be 0.12;
c4: setting the dynamic friction coefficients of the rotating pairs R1 and R2 to be 0.0035 and the static friction coefficient to be 0.0040;
c5: setting parameters of a Simulation Control module in ADAMS as follows: the simulation end time is 0.1s, and the simulation steps are 100 steps.
7. The method for acquiring the stroke curve of the circuit breaker operating mechanism according to claim 1, wherein the step D specifically comprises:
d1: selecting a Marker point in a Construction column in ADAMS software, and fixing the Marker point at the tail end of the crank arm;
d2: after fixing the Marker point, selecting the Measure option of the point, selecting the relational displacement in the Characteriodic column, and then clicking 'Y' in the Component column; and named displacement;
d3: selecting the Measure option of the Marker point again, selecting the relational coordinate in the Characteriostic column, and then clicking 'Y' in the Component column; and is named as velocity;
d4: carrying out simulation calculation on a multi-body dynamic model of the operating mechanism to obtain a stroke and speed curve of the operating mechanism;
d5: and after the calculation is finished, selecting a Postprocessor module in a Result column in the ADAMS, and respectively selecting displacement and velocity in a Measure column of the module to obtain a stroke curve and a speed curve of the operating mechanism.
8. The method for acquiring the stroke curve of the circuit breaker operating mechanism according to claim 1, wherein the step E specifically comprises:
e1: extracting the peak value X of the travel curve p And its corresponding time t p Moving contact motion time t and peak value v of speed curve p And the corresponding time v t ；
E2: acquiring actual measurement numerical values of the five physical quantities in the step E1;
e3: comparing the five physical quantity values extracted in the step E1 with the actual measurement results of the corresponding five physical quantities in the step E2, and calculating the deviation of each of the five physical quantities:
Figure FDA0003944314380000041
e4: if the absolute values of the deviation of the five physical quantities in the step E3 are all within 20%, the stroke curve of the operating mechanism meets the requirement; otherwise, modifying the dynamic friction coefficients of the rotating pairs R1 and R2 in the multi-body dynamic model, and re-acquiring the stroke curve until the deviation of the five physical quantities in the step E3 is less than 20%.
CN202110670346.2A 2021-06-17 2021-06-17 Method for acquiring stroke curve of circuit breaker operating mechanism Active CN113408067B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110670346.2A CN113408067B (en) 2021-06-17 2021-06-17 Method for acquiring stroke curve of circuit breaker operating mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110670346.2A CN113408067B (en) 2021-06-17 2021-06-17 Method for acquiring stroke curve of circuit breaker operating mechanism

Publications (2)

Publication Number Publication Date
CN113408067A CN113408067A (en) 2021-09-17
CN113408067B true CN113408067B (en) 2023-02-28

Family

ID=77684615

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110670346.2A Active CN113408067B (en) 2021-06-17 2021-06-17 Method for acquiring stroke curve of circuit breaker operating mechanism

Country Status (1)

Country Link
CN (1) CN113408067B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115078983A (en) * 2022-06-17 2022-09-20 国网河南省电力公司电力科学研究院 Circuit breaker stroke curve measuring method and device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106096165A (en) * 2016-06-22 2016-11-09 北华大学 A kind of method of the ADAMS script multiple pattern of analogue crank slide block mechanism
CN112580194A (en) * 2020-11-27 2021-03-30 西安交通大学 Construction method of virtual prototype of circuit breaker operating mechanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3460822B1 (en) * 2017-09-26 2021-04-07 ABB Schweiz AG Method for operating a medium voltage circuit breaker or recloser and medium voltage circuit breaker or recloser itself

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106096165A (en) * 2016-06-22 2016-11-09 北华大学 A kind of method of the ADAMS script multiple pattern of analogue crank slide block mechanism
CN112580194A (en) * 2020-11-27 2021-03-30 西安交通大学 Construction method of virtual prototype of circuit breaker operating mechanism

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
动车组主断路器分析优化与试验研究;邓文明;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20200415;摘要、第1-6章 *
基于Pro/E和ADAMS的高压断路器机构仿真分析;屠凯等;《机械研究与应用》;20090630(第03期);第47-48页 *
断路器弹簧操动机构参数化建模与优化;任效龙，等;《机械设计与制造》;20180228;第142-145页 *
邓文明.动车组主断路器分析优化与试验研究.《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》.2020, *

Also Published As

Publication number Publication date
CN113408067A (en) 2021-09-17

Similar Documents

Publication Publication Date Title
CN113408067B (en) Method for acquiring stroke curve of circuit breaker operating mechanism
CN104156541B (en) A kind of emulation platform system and method for breaker in extra high voltage hydraulic actuating mechanism
CN107742130A (en) High iron catenary based on deep learning supports device fastener failure diagnostic method
CN206029943U (en) Machinery indicates dexterous hand more
CN110435710B (en) Simulation control method and device for train pipe pressure and simulation controller
CN105930622A (en) Method for determining motion state of spring operating mechanism of circuit breaker
CN205691328U (en) Board test apparatus is stepped in a kind of parking
CN209296334U (en) A kind of pump load simulation test device
CN102068818B (en) Dynamic game machine platform with functions of fault tolerance and error correction and fault tolerance and error correction method
JP6779458B1 (en) Machine learning equipment, data processing systems, inference equipment and machine learning methods
CN109176106A (en) A kind of tool changing device and its cutter replacing method having vertical sleeping conversion function
CN105702520B (en) A kind of large power spring operation mechanism
CN102166754A (en) Two-degree-of-freedom shoulder joint mechanism for robot
CN110355740A (en) Parallel institution with two kinds of motor patterns of 1R1T and 3T
CN109241553B (en) A kind of joint of mechanical arm Real-time dynamics modeling method
CN103398911A (en) Torque testing machine for drill rod joint
CN207204985U (en) A kind of bearing machining hole punched device of convenient buffering
CN203616143U (en) Worm and gear type electronic parking brake gradient simulation testing station
CN103935241A (en) Matching structure of clutch pedal and clutch main cylinder
CN204924814U (en) Can realize that three dimensions is respectively to removing large -scale staight scissors appearance
CN206891711U (en) A kind of push type quick-detachable lock durability automatic testing equipment
CN207087297U (en) One kind is tightened to determine nut body
CN206474963U (en) Automatic turning device
CN206811961U (en) Truss manipulator based on planetary gear train
CN207556818U (en) A kind of big axis aeration valve action checking device of the hydraulic turbine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant